Update to iD v2.20.2

[rails.git] / vendor / assets / iD / iD.js

diff --git a/vendor/assets/iD/iD.js b/vendor/assets/iD/iD.js
index ba3246b5f48ac1bb3616031fa6be2bbb6407686c..929da2dd897561a44e4f6e2378bc5222f7964612 100644 (file)
--- a/vendor/assets/iD/iD.js
+++ b/vendor/assets/iD/iD.js
@@ -1,55586 +1,54457 @@
 (function () {
 (function () {

-       var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
-
-       function createCommonjsModule(fn, basedir, module) {
-               return module = {
-                 path: basedir,
-                 exports: {},
-                 require: function (path, base) {
-             return commonjsRequire(path, (base === undefined || base === null) ? module.path : base);
-           }
-               }, fn(module, module.exports), module.exports;
-       }

 
 

-       function getCjsExportFromNamespace (n) {
-               return n && n['default'] || n;
-       }
+       var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};

 
 

-       function commonjsRequire () {
-               throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');
-       }
+       var check = function (it) {
+         return it && it.Math == Math && it;
+       };

 
 

-       var isImplemented = function () {
-               var set, iterator, result;
-               if (typeof Set !== 'function') { return false; }
-               set = new Set(['raz', 'dwa', 'trzy']);
-               if (String(set) !== '[object Set]') { return false; }
-               if (set.size !== 3) { return false; }
-               if (typeof set.add !== 'function') { return false; }
-               if (typeof set.clear !== 'function') { return false; }
-               if (typeof set.delete !== 'function') { return false; }
-               if (typeof set.entries !== 'function') { return false; }
-               if (typeof set.forEach !== 'function') { return false; }
-               if (typeof set.has !== 'function') { return false; }
-               if (typeof set.keys !== 'function') { return false; }
-               if (typeof set.values !== 'function') { return false; }
+       // https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
+       var global$F =
+         // eslint-disable-next-line es/no-global-this -- safe
+         check(typeof globalThis == 'object' && globalThis) ||
+         check(typeof window == 'object' && window) ||
+         // eslint-disable-next-line no-restricted-globals -- safe
+         check(typeof self == 'object' && self) ||
+         check(typeof commonjsGlobal == 'object' && commonjsGlobal) ||
+         // eslint-disable-next-line no-new-func -- fallback
+         (function () { return this; })() || Function('return this')();

 
 

-               iterator = set.values();
-               result = iterator.next();
-               if (result.done !== false) { return false; }
-               if (result.value !== 'raz') { return false; }
+       var objectGetOwnPropertyDescriptor = {};

 
 

-               return true;
+       var fails$N = function (exec) {
+         try {
+           return !!exec();
+         } catch (error) {
+           return true;
+         }

        };
 
        };
 

-       // eslint-disable-next-line no-empty-function
-       var noop = function () {};
+       var fails$M = fails$N;

 
 

-       var _undefined = noop(); // Support ES3 engines
+       // Detect IE8's incomplete defineProperty implementation
+       var descriptors = !fails$M(function () {
+         // eslint-disable-next-line es/no-object-defineproperty -- required for testing
+         return Object.defineProperty({}, 1, { get: function () { return 7; } })[1] != 7;
+       });

 
 

-       var isValue = function (val) { return val !== _undefined && val !== null; };
+       var objectPropertyIsEnumerable = {};

 
 

-       var validValue = function (value) {
-               if (!isValue(value)) { throw new TypeError("Cannot use null or undefined"); }
-               return value;
-       };
+       var $propertyIsEnumerable$1 = {}.propertyIsEnumerable;
+       // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+       var getOwnPropertyDescriptor$5 = Object.getOwnPropertyDescriptor;

 
 

-       var clear = function () {
-               validValue(this).length = 0;
-               return this;
-       };
+       // Nashorn ~ JDK8 bug
+       var NASHORN_BUG = getOwnPropertyDescriptor$5 && !$propertyIsEnumerable$1.call({ 1: 2 }, 1);

 
 

-       var isImplemented$1 = function () {
-               var numberIsNaN = Number.isNaN;
-               if (typeof numberIsNaN !== "function") { return false; }
-               return !numberIsNaN({}) && numberIsNaN(NaN) && !numberIsNaN(34);
-       };
+       // `Object.prototype.propertyIsEnumerable` method implementation
+       // https://tc39.es/ecma262/#sec-object.prototype.propertyisenumerable
+       objectPropertyIsEnumerable.f = NASHORN_BUG ? function propertyIsEnumerable(V) {
+         var descriptor = getOwnPropertyDescriptor$5(this, V);
+         return !!descriptor && descriptor.enumerable;
+       } : $propertyIsEnumerable$1;

 
 

-       var shim = function (value) {
-               // eslint-disable-next-line no-self-compare
-               return value !== value;
+       var createPropertyDescriptor$7 = function (bitmap, value) {
+         return {
+           enumerable: !(bitmap & 1),
+           configurable: !(bitmap & 2),
+           writable: !(bitmap & 4),
+           value: value
+         };

        };
 
        };
 

-       var isNan = isImplemented$1() ? Number.isNaN : shim;
+       var toString$2 = {}.toString;

 
 

-       var isImplemented$2 = function () {
-               var sign = Math.sign;
-               if (typeof sign !== "function") { return false; }
-               return sign(10) === 1 && sign(-20) === -1;
+       var classofRaw$1 = function (it) {
+         return toString$2.call(it).slice(8, -1);

        };
 
        };
 

-       var shim$1 = function (value) {
-               value = Number(value);
-               if (isNaN(value) || value === 0) { return value; }
-               return value > 0 ? 1 : -1;
-       };
+       var fails$L = fails$N;
+       var classof$c = classofRaw$1;

 
 

-       var sign = isImplemented$2() ? Math.sign : shim$1;
+       var split$1 = ''.split;

 
 

-       var abs   = Math.abs
-         , floor = Math.floor;
+       // fallback for non-array-like ES3 and non-enumerable old V8 strings
+       var indexedObject = fails$L(function () {
+         // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346
+         // eslint-disable-next-line no-prototype-builtins -- safe
+         return !Object('z').propertyIsEnumerable(0);
+       }) ? function (it) {
+         return classof$c(it) == 'String' ? split$1.call(it, '') : Object(it);
+       } : Object;

 
 

-       var toInteger = function (value) {
-               if (isNaN(value)) { return 0; }
-               value = Number(value);
-               if (value === 0 || !isFinite(value)) { return value; }
-               return sign(value) * floor(abs(value));
+       // `RequireObjectCoercible` abstract operation
+       // https://tc39.es/ecma262/#sec-requireobjectcoercible
+       var requireObjectCoercible$e = function (it) {
+         if (it == undefined) throw TypeError("Can't call method on " + it);
+         return it;

        };
 
        };
 

-       var max       = Math.max;
+       // toObject with fallback for non-array-like ES3 strings
+       var IndexedObject$4 = indexedObject;
+       var requireObjectCoercible$d = requireObjectCoercible$e;

 
 

-       var toPosInteger = function (value) { return max(0, toInteger(value)); };
-
-       var indexOf           = Array.prototype.indexOf
-         , objHasOwnProperty = Object.prototype.hasOwnProperty
-         , abs$1               = Math.abs
-         , floor$1             = Math.floor;
+       var toIndexedObject$b = function (it) {
+         return IndexedObject$4(requireObjectCoercible$d(it));
+       };

 
 

-       var eIndexOf = function (searchElement/*, fromIndex*/) {
-               var i, length, fromIndex, val;
-               if (!isNan(searchElement)) { return indexOf.apply(this, arguments); }
+       var isObject$r = function (it) {
+         return typeof it === 'object' ? it !== null : typeof it === 'function';
+       };

 
 

-               length = toPosInteger(validValue(this).length);
-               fromIndex = arguments[1];
-               if (isNaN(fromIndex)) { fromIndex = 0; }
-               else if (fromIndex >= 0) { fromIndex = floor$1(fromIndex); }
-               else { fromIndex = toPosInteger(this.length) - floor$1(abs$1(fromIndex)); }
+       var isObject$q = isObject$r;

 
 

-               for (i = fromIndex; i < length; ++i) {
-                       if (objHasOwnProperty.call(this, i)) {
-                               val = this[i];
-                               if (isNan(val)) { return i; } // Jslint: ignore
-                       }
-               }
-               return -1;
+       // `ToPrimitive` abstract operation
+       // https://tc39.es/ecma262/#sec-toprimitive
+       // instead of the ES6 spec version, we didn't implement @@toPrimitive case
+       // and the second argument - flag - preferred type is a string
+       var toPrimitive$7 = function (input, PREFERRED_STRING) {
+         if (!isObject$q(input)) return input;
+         var fn, val;
+         if (PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject$q(val = fn.call(input))) return val;
+         if (typeof (fn = input.valueOf) == 'function' && !isObject$q(val = fn.call(input))) return val;
+         if (!PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject$q(val = fn.call(input))) return val;
+         throw TypeError("Can't convert object to primitive value");

        };
 
        };
 

-       var create = Object.create, getPrototypeOf = Object.getPrototypeOf, plainObject = {};
+       var requireObjectCoercible$c = requireObjectCoercible$e;

 
 

-       var isImplemented$3 = function (/* CustomCreate*/) {
-               var setPrototypeOf = Object.setPrototypeOf, customCreate = arguments[0] || create;
-               if (typeof setPrototypeOf !== "function") { return false; }
-               return getPrototypeOf(setPrototypeOf(customCreate(null), plainObject)) === plainObject;
+       // `ToObject` abstract operation
+       // https://tc39.es/ecma262/#sec-toobject
+       var toObject$i = function (argument) {
+         return Object(requireObjectCoercible$c(argument));

        };
 
        };
 

-       var map = { function: true, object: true };
-
-       var isObject = function (value) { return (isValue(value) && map[typeof value]) || false; };
-
-       var create$1 = Object.create, shim$2;
-
-       if (!isImplemented$3()) {
-               shim$2 = shim$3;
-       }
-
-       var create_1 = (function () {
-               var nullObject, polyProps, desc;
-               if (!shim$2) { return create$1; }
-               if (shim$2.level !== 1) { return create$1; }
-
-               nullObject = {};
-               polyProps = {};
-               desc = { configurable: false, enumerable: false, writable: true, value: undefined };
-               Object.getOwnPropertyNames(Object.prototype).forEach(function (name) {
-                       if (name === "__proto__") {
-                               polyProps[name] = {
-                                       configurable: true,
-                                       enumerable: false,
-                                       writable: true,
-                                       value: undefined
-                               };
-                               return;
-                       }
-                       polyProps[name] = desc;
-               });
-               Object.defineProperties(nullObject, polyProps);
-
-               Object.defineProperty(shim$2, "nullPolyfill", {
-                       configurable: false,
-                       enumerable: false,
-                       writable: false,
-                       value: nullObject
-               });
-
-               return function (prototype, props) {
-                       return create$1(prototype === null ? nullObject : prototype, props);
-               };
-       })();
-
-       var objIsPrototypeOf = Object.prototype.isPrototypeOf
-         , defineProperty   = Object.defineProperty
-         , nullDesc         = { configurable: true, enumerable: false, writable: true, value: undefined }
-         , validate;
+       var toObject$h = toObject$i;

 
 

-       validate = function (obj, prototype) {
-               validValue(obj);
-               if (prototype === null || isObject(prototype)) { return obj; }
-               throw new TypeError("Prototype must be null or an object");
-       };
+       var hasOwnProperty$3 = {}.hasOwnProperty;

 
 

-       var shim$3 = (function (status) {
-               var fn, set;
-               if (!status) { return null; }
-               if (status.level === 2) {
-                       if (status.set) {
-                               set = status.set;
-                               fn = function (obj, prototype) {
-                                       set.call(validate(obj, prototype), prototype);
-                                       return obj;
-                               };
-                       } else {
-                               fn = function (obj, prototype) {
-                                       validate(obj, prototype).__proto__ = prototype;
-                                       return obj;
-                               };
-                       }
-               } else {
-                       fn = function self(obj, prototype) {
-                               var isNullBase;
-                               validate(obj, prototype);
-                               isNullBase = objIsPrototypeOf.call(self.nullPolyfill, obj);
-                               if (isNullBase) { delete self.nullPolyfill.__proto__; }
-                               if (prototype === null) { prototype = self.nullPolyfill; }
-                               obj.__proto__ = prototype;
-                               if (isNullBase) { defineProperty(self.nullPolyfill, "__proto__", nullDesc); }
-                               return obj;
-                       };
-               }
-               return Object.defineProperty(fn, "level", {
-                       configurable: false,
-                       enumerable: false,
-                       writable: false,
-                       value: status.level
-               });
-       })(
-               (function () {
-                       var tmpObj1 = Object.create(null)
-                         , tmpObj2 = {}
-                         , set
-                         , desc = Object.getOwnPropertyDescriptor(Object.prototype, "__proto__");
-
-                       if (desc) {
-                               try {
-                                       set = desc.set; // Opera crashes at this point
-                                       set.call(tmpObj1, tmpObj2);
-                               } catch (ignore) {}
-                               if (Object.getPrototypeOf(tmpObj1) === tmpObj2) { return { set: set, level: 2 }; }
-                       }
-
-                       tmpObj1.__proto__ = tmpObj2;
-                       if (Object.getPrototypeOf(tmpObj1) === tmpObj2) { return { level: 2 }; }
-
-                       tmpObj1 = {};
-                       tmpObj1.__proto__ = tmpObj2;
-                       if (Object.getPrototypeOf(tmpObj1) === tmpObj2) { return { level: 1 }; }
-
-                       return false;
-               })()
-       );
-
-       var setPrototypeOf = isImplemented$3() ? Object.setPrototypeOf : shim$3;
-
-       var validCallable = function (fn) {
-               if (typeof fn !== "function") { throw new TypeError(fn + " is not a function"); }
-               return fn;
+       var has$j = Object.hasOwn || function hasOwn(it, key) {
+         return hasOwnProperty$3.call(toObject$h(it), key);

        };
 
        };
 

-       // ES3 safe
-       var _undefined$1 = void 0;
+       var global$E = global$F;
+       var isObject$p = isObject$r;

 
 

-       var is = function (value) { return value !== _undefined$1 && value !== null; };
+       var document$3 = global$E.document;
+       // typeof document.createElement is 'object' in old IE
+       var EXISTS = isObject$p(document$3) && isObject$p(document$3.createElement);

 
 

-       // prettier-ignore
-       var possibleTypes = { "object": true, "function": true, "undefined": true /* document.all */ };
-
-       var is$1 = function (value) {
-               if (!is(value)) { return false; }
-               return hasOwnProperty.call(possibleTypes, typeof value);
+       var documentCreateElement$1 = function (it) {
+         return EXISTS ? document$3.createElement(it) : {};

        };
 
        };
 

-       var is$2 = function (value) {
-               if (!is$1(value)) { return false; }
-               try {
-                       if (!value.constructor) { return false; }
-                       return value.constructor.prototype === value;
-               } catch (error) {
-                       return false;
-               }
-       };
+       var DESCRIPTORS$m = descriptors;
+       var fails$K = fails$N;
+       var createElement$1 = documentCreateElement$1;

 
 

-       var is$3 = function (value) {
-               if (typeof value !== "function") { return false; }
+       // Thank's IE8 for his funny defineProperty
+       var ie8DomDefine = !DESCRIPTORS$m && !fails$K(function () {
+         // eslint-disable-next-line es/no-object-defineproperty -- requied for testing
+         return Object.defineProperty(createElement$1('div'), 'a', {
+           get: function () { return 7; }
+         }).a != 7;
+       });

 
 

-               if (!hasOwnProperty.call(value, "length")) { return false; }
+       var DESCRIPTORS$l = descriptors;
+       var propertyIsEnumerableModule$2 = objectPropertyIsEnumerable;
+       var createPropertyDescriptor$6 = createPropertyDescriptor$7;
+       var toIndexedObject$a = toIndexedObject$b;
+       var toPrimitive$6 = toPrimitive$7;
+       var has$i = has$j;
+       var IE8_DOM_DEFINE$1 = ie8DomDefine;

 
 

-               try {
-                       if (typeof value.length !== "number") { return false; }
-                       if (typeof value.call !== "function") { return false; }
-                       if (typeof value.apply !== "function") { return false; }
-               } catch (error) {
-                       return false;
-               }
+       // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+       var $getOwnPropertyDescriptor$1 = Object.getOwnPropertyDescriptor;

 
 

-               return !is$2(value);
+       // `Object.getOwnPropertyDescriptor` method
+       // https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
+       objectGetOwnPropertyDescriptor.f = DESCRIPTORS$l ? $getOwnPropertyDescriptor$1 : function getOwnPropertyDescriptor(O, P) {
+         O = toIndexedObject$a(O);
+         P = toPrimitive$6(P, true);
+         if (IE8_DOM_DEFINE$1) try {
+           return $getOwnPropertyDescriptor$1(O, P);
+         } catch (error) { /* empty */ }
+         if (has$i(O, P)) return createPropertyDescriptor$6(!propertyIsEnumerableModule$2.f.call(O, P), O[P]);

        };
 
        };
 

-       var classRe = /^\s*class[\s{/}]/, functionToString = Function.prototype.toString;
-
-       var is$4 = function (value) {
-               if (!is$3(value)) { return false; }
-               if (classRe.test(functionToString.call(value))) { return false; }
-               return true;
-       };
+       var objectDefineProperty = {};

 
 

-       var isImplemented$4 = function () {
-               var assign = Object.assign, obj;
-               if (typeof assign !== "function") { return false; }
-               obj = { foo: "raz" };
-               assign(obj, { bar: "dwa" }, { trzy: "trzy" });
-               return obj.foo + obj.bar + obj.trzy === "razdwatrzy";
-       };
+       var isObject$o = isObject$r;

 
 

-       var isImplemented$5 = function () {
-               try {
-                       Object.keys("primitive");
-                       return true;
-               } catch (e) {
-                       return false;
-               }
+       var anObject$m = function (it) {
+         if (!isObject$o(it)) {
+           throw TypeError(String(it) + ' is not an object');
+         } return it;

        };
 
        };
 

-       var keys = Object.keys;
-
-       var shim$4 = function (object) { return keys(isValue(object) ? Object(object) : object); };
-
-       var keys$1 = isImplemented$5() ? Object.keys : shim$4;
+       var DESCRIPTORS$k = descriptors;
+       var IE8_DOM_DEFINE = ie8DomDefine;
+       var anObject$l = anObject$m;
+       var toPrimitive$5 = toPrimitive$7;

 
 

-       var max$1   = Math.max;
+       // eslint-disable-next-line es/no-object-defineproperty -- safe
+       var $defineProperty$1 = Object.defineProperty;

 
 

-       var shim$5 = function (dest, src/*, …srcn*/) {
-               var arguments$1 = arguments;
-
-               var error, i, length = max$1(arguments.length, 2), assign;
-               dest = Object(validValue(dest));
-               assign = function (key) {
-                       try {
-                               dest[key] = src[key];
-                       } catch (e) {
-                               if (!error) { error = e; }
-                       }
-               };
-               for (i = 1; i < length; ++i) {
-                       src = arguments$1[i];
-                       keys$1(src).forEach(assign);
-               }
-               if (error !== undefined) { throw error; }
-               return dest;
+       // `Object.defineProperty` method
+       // https://tc39.es/ecma262/#sec-object.defineproperty
+       objectDefineProperty.f = DESCRIPTORS$k ? $defineProperty$1 : function defineProperty(O, P, Attributes) {
+         anObject$l(O);
+         P = toPrimitive$5(P, true);
+         anObject$l(Attributes);
+         if (IE8_DOM_DEFINE) try {
+           return $defineProperty$1(O, P, Attributes);
+         } catch (error) { /* empty */ }
+         if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');
+         if ('value' in Attributes) O[P] = Attributes.value;
+         return O;

        };
 
        };
 

-       var assign = isImplemented$4() ? Object.assign : shim$5;
-
-       var forEach = Array.prototype.forEach, create$2 = Object.create;
+       var DESCRIPTORS$j = descriptors;
+       var definePropertyModule$7 = objectDefineProperty;
+       var createPropertyDescriptor$5 = createPropertyDescriptor$7;

 
 

-       var process$1 = function (src, obj) {
-               var key;
-               for (key in src) { obj[key] = src[key]; }
+       var createNonEnumerableProperty$e = DESCRIPTORS$j ? function (object, key, value) {
+         return definePropertyModule$7.f(object, key, createPropertyDescriptor$5(1, value));
+       } : function (object, key, value) {
+         object[key] = value;
+         return object;

        };
 
        };
 

-       // eslint-disable-next-line no-unused-vars
-       var normalizeOptions = function (opts1/*, …options*/) {
-               var result = create$2(null);
-               forEach.call(arguments, function (options) {
-                       if (!isValue(options)) { return; }
-                       process$1(Object(options), result);
-               });
-               return result;
-       };
+       var redefine$g = {exports: {}};

 
 

-       var str = "razdwatrzy";
+       var global$D = global$F;
+       var createNonEnumerableProperty$d = createNonEnumerableProperty$e;

 
 

-       var isImplemented$6 = function () {
-               if (typeof str.contains !== "function") { return false; }
-               return str.contains("dwa") === true && str.contains("foo") === false;
+       var setGlobal$3 = function (key, value) {
+         try {
+           createNonEnumerableProperty$d(global$D, key, value);
+         } catch (error) {
+           global$D[key] = value;
+         } return value;

        };
 
        };
 

-       var indexOf$1 = String.prototype.indexOf;
+       var global$C = global$F;
+       var setGlobal$2 = setGlobal$3;

 
 

-       var shim$6 = function (searchString/*, position*/) {
-               return indexOf$1.call(this, searchString, arguments[1]) > -1;
-       };
+       var SHARED = '__core-js_shared__';
+       var store$4 = global$C[SHARED] || setGlobal$2(SHARED, {});

 
 

-       var contains = isImplemented$6() ? String.prototype.contains : shim$6;
+       var sharedStore = store$4;

 
 

-       var d_1 = createCommonjsModule(function (module) {
+       var store$3 = sharedStore;

 
 

+       var functionToString = Function.toString;

 
 

+       // this helper broken in `core-js@3.4.1-3.4.4`, so we can't use `shared` helper
+       if (typeof store$3.inspectSource != 'function') {
+         store$3.inspectSource = function (it) {
+           return functionToString.call(it);
+         };
+       }

 
 

-       var d = (module.exports = function (dscr, value/*, options*/) {
-               var c, e, w, options, desc;
-               if (arguments.length < 2 || typeof dscr !== "string") {
-                       options = value;
-                       value = dscr;
-                       dscr = null;
-               } else {
-                       options = arguments[2];
-               }
-               if (is(dscr)) {
-                       c = contains.call(dscr, "c");
-                       e = contains.call(dscr, "e");
-                       w = contains.call(dscr, "w");
-               } else {
-                       c = w = true;
-                       e = false;
-               }
+       var inspectSource$3 = store$3.inspectSource;

 
 

-               desc = { value: value, configurable: c, enumerable: e, writable: w };
-               return !options ? desc : assign(normalizeOptions(options), desc);
-       });
+       var global$B = global$F;
+       var inspectSource$2 = inspectSource$3;

 
 

-       d.gs = function (dscr, get, set/*, options*/) {
-               var c, e, options, desc;
-               if (typeof dscr !== "string") {
-                       options = set;
-                       set = get;
-                       get = dscr;
-                       dscr = null;
-               } else {
-                       options = arguments[3];
-               }
-               if (!is(get)) {
-                       get = undefined;
-               } else if (!is$4(get)) {
-                       options = get;
-                       get = set = undefined;
-               } else if (!is(set)) {
-                       set = undefined;
-               } else if (!is$4(set)) {
-                       options = set;
-                       set = undefined;
-               }
-               if (is(dscr)) {
-                       c = contains.call(dscr, "c");
-                       e = contains.call(dscr, "e");
-               } else {
-                       c = true;
-                       e = false;
-               }
-
-               desc = { get: get, set: set, configurable: c, enumerable: e };
-               return !options ? desc : assign(normalizeOptions(options), desc);
-       };
-       });
+       var WeakMap$1 = global$B.WeakMap;

 
 

-       var eventEmitter = createCommonjsModule(function (module, exports) {
+       var nativeWeakMap = typeof WeakMap$1 === 'function' && /native code/.test(inspectSource$2(WeakMap$1));

 
 

-       var apply = Function.prototype.apply, call = Function.prototype.call
-         , create = Object.create, defineProperty = Object.defineProperty
-         , defineProperties = Object.defineProperties
-         , hasOwnProperty = Object.prototype.hasOwnProperty
-         , descriptor = { configurable: true, enumerable: false, writable: true }
+       var shared$5 = {exports: {}};

 
 

-         , on, once, off, emit, methods, descriptors, base;
+       var isPure = false;

 
 

-       on = function (type, listener) {
-               var data;
+       var store$2 = sharedStore;

 
 

-               validCallable(listener);
+       (shared$5.exports = function (key, value) {
+         return store$2[key] || (store$2[key] = value !== undefined ? value : {});
+       })('versions', []).push({
+         version: '3.15.0',
+         mode: 'global',
+         copyright: '© 2021 Denis Pushkarev (zloirock.ru)'
+       });

 
 

-               if (!hasOwnProperty.call(this, '__ee__')) {
-                       data = descriptor.value = create(null);
-                       defineProperty(this, '__ee__', descriptor);
-                       descriptor.value = null;
-               } else {
-                       data = this.__ee__;
-               }
-               if (!data[type]) { data[type] = listener; }
-               else if (typeof data[type] === 'object') { data[type].push(listener); }
-               else { data[type] = [data[type], listener]; }
+       var id$2 = 0;
+       var postfix = Math.random();

 
 

-               return this;
+       var uid$5 = function (key) {
+         return 'Symbol(' + String(key === undefined ? '' : key) + ')_' + (++id$2 + postfix).toString(36);

        };
 
        };
 

-       once = function (type, listener) {
-               var once, self;
+       var shared$4 = shared$5.exports;
+       var uid$4 = uid$5;

 
 

-               validCallable(listener);
-               self = this;
-               on.call(this, type, once = function () {
-                       off.call(self, type, once);
-                       apply.call(listener, this, arguments);
-               });
+       var keys$3 = shared$4('keys');

 
 

-               once.__eeOnceListener__ = listener;
-               return this;
+       var sharedKey$4 = function (key) {
+         return keys$3[key] || (keys$3[key] = uid$4(key));

        };
 
        };
 

-       off = function (type, listener) {
-               var data, listeners, candidate, i;
-
-               validCallable(listener);
-
-               if (!hasOwnProperty.call(this, '__ee__')) { return this; }
-               data = this.__ee__;
-               if (!data[type]) { return this; }
-               listeners = data[type];
-
-               if (typeof listeners === 'object') {
-                       for (i = 0; (candidate = listeners[i]); ++i) {
-                               if ((candidate === listener) ||
-                                               (candidate.__eeOnceListener__ === listener)) {
-                                       if (listeners.length === 2) { data[type] = listeners[i ? 0 : 1]; }
-                                       else { listeners.splice(i, 1); }
-                               }
-                       }
-               } else {
-                       if ((listeners === listener) ||
-                                       (listeners.__eeOnceListener__ === listener)) {
-                               delete data[type];
-                       }
-               }
-
-               return this;
-       };
+       var hiddenKeys$6 = {};

 
 

-       emit = function (type) {
-               var arguments$1 = arguments;
-
-               var i, l, listener, listeners, args;
-
-               if (!hasOwnProperty.call(this, '__ee__')) { return; }
-               listeners = this.__ee__[type];
-               if (!listeners) { return; }
-
-               if (typeof listeners === 'object') {
-                       l = arguments.length;
-                       args = new Array(l - 1);
-                       for (i = 1; i < l; ++i) { args[i - 1] = arguments$1[i]; }
-
-                       listeners = listeners.slice();
-                       for (i = 0; (listener = listeners[i]); ++i) {
-                               apply.call(listener, this, args);
-                       }
-               } else {
-                       switch (arguments.length) {
-                       case 1:
-                               call.call(listeners, this);
-                               break;
-                       case 2:
-                               call.call(listeners, this, arguments[1]);
-                               break;
-                       case 3:
-                               call.call(listeners, this, arguments[1], arguments[2]);
-                               break;
-                       default:
-                               l = arguments.length;
-                               args = new Array(l - 1);
-                               for (i = 1; i < l; ++i) {
-                                       args[i - 1] = arguments$1[i];
-                               }
-                               apply.call(listeners, this, args);
-                       }
-               }
-       };
+       var NATIVE_WEAK_MAP = nativeWeakMap;
+       var global$A = global$F;
+       var isObject$n = isObject$r;
+       var createNonEnumerableProperty$c = createNonEnumerableProperty$e;
+       var objectHas = has$j;
+       var shared$3 = sharedStore;
+       var sharedKey$3 = sharedKey$4;
+       var hiddenKeys$5 = hiddenKeys$6;

 
 

-       methods = {
-               on: on,
-               once: once,
-               off: off,
-               emit: emit
-       };
+       var OBJECT_ALREADY_INITIALIZED = 'Object already initialized';
+       var WeakMap = global$A.WeakMap;
+       var set$4, get$5, has$h;

 
 

-       descriptors = {
-               on: d_1(on),
-               once: d_1(once),
-               off: d_1(off),
-               emit: d_1(emit)
+       var enforce = function (it) {
+         return has$h(it) ? get$5(it) : set$4(it, {});

        };
 
        };
 

-       base = defineProperties({}, descriptors);
-
-       module.exports = exports = function (o) {
-               return (o == null) ? create(base) : defineProperties(Object(o), descriptors);
+       var getterFor = function (TYPE) {
+         return function (it) {
+           var state;
+           if (!isObject$n(it) || (state = get$5(it)).type !== TYPE) {
+             throw TypeError('Incompatible receiver, ' + TYPE + ' required');
+           } return state;
+         };

        };
        };

-       exports.methods = methods;
+
+       if (NATIVE_WEAK_MAP || shared$3.state) {
+         var store$1 = shared$3.state || (shared$3.state = new WeakMap());
+         var wmget = store$1.get;
+         var wmhas = store$1.has;
+         var wmset = store$1.set;
+         set$4 = function (it, metadata) {
+           if (wmhas.call(store$1, it)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);
+           metadata.facade = it;
+           wmset.call(store$1, it, metadata);
+           return metadata;
+         };
+         get$5 = function (it) {
+           return wmget.call(store$1, it) || {};
+         };
+         has$h = function (it) {
+           return wmhas.call(store$1, it);
+         };
+       } else {
+         var STATE = sharedKey$3('state');
+         hiddenKeys$5[STATE] = true;
+         set$4 = function (it, metadata) {
+           if (objectHas(it, STATE)) throw new TypeError(OBJECT_ALREADY_INITIALIZED);
+           metadata.facade = it;
+           createNonEnumerableProperty$c(it, STATE, metadata);
+           return metadata;
+         };
+         get$5 = function (it) {
+           return objectHas(it, STATE) ? it[STATE] : {};
+         };
+         has$h = function (it) {
+           return objectHas(it, STATE);
+         };
+       }
+
+       var internalState = {
+         set: set$4,
+         get: get$5,
+         has: has$h,
+         enforce: enforce,
+         getterFor: getterFor
+       };
+
+       var global$z = global$F;
+       var createNonEnumerableProperty$b = createNonEnumerableProperty$e;
+       var has$g = has$j;
+       var setGlobal$1 = setGlobal$3;
+       var inspectSource$1 = inspectSource$3;
+       var InternalStateModule$9 = internalState;
+
+       var getInternalState$7 = InternalStateModule$9.get;
+       var enforceInternalState$1 = InternalStateModule$9.enforce;
+       var TEMPLATE = String(String).split('String');
+
+       (redefine$g.exports = function (O, key, value, options) {
+         var unsafe = options ? !!options.unsafe : false;
+         var simple = options ? !!options.enumerable : false;
+         var noTargetGet = options ? !!options.noTargetGet : false;
+         var state;
+         if (typeof value == 'function') {
+           if (typeof key == 'string' && !has$g(value, 'name')) {
+             createNonEnumerableProperty$b(value, 'name', key);
+           }
+           state = enforceInternalState$1(value);
+           if (!state.source) {
+             state.source = TEMPLATE.join(typeof key == 'string' ? key : '');
+           }
+         }
+         if (O === global$z) {
+           if (simple) O[key] = value;
+           else setGlobal$1(key, value);
+           return;
+         } else if (!unsafe) {
+           delete O[key];
+         } else if (!noTargetGet && O[key]) {
+           simple = true;
+         }
+         if (simple) O[key] = value;
+         else createNonEnumerableProperty$b(O, key, value);
+       // add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative
+       })(Function.prototype, 'toString', function toString() {
+         return typeof this == 'function' && getInternalState$7(this).source || inspectSource$1(this);

        });
 
        });
 

-       var validTypes = { object: true, symbol: true };
+       var global$y = global$F;

 
 

-       var isImplemented$7 = function () {
-               var symbol;
-               if (typeof Symbol !== 'function') { return false; }
-               symbol = Symbol('test symbol');
-               try { String(symbol); } catch (e) { return false; }
+       var path$2 = global$y;

 
 

-               // Return 'true' also for polyfills
-               if (!validTypes[typeof Symbol.iterator]) { return false; }
-               if (!validTypes[typeof Symbol.toPrimitive]) { return false; }
-               if (!validTypes[typeof Symbol.toStringTag]) { return false; }
+       var path$1 = path$2;
+       var global$x = global$F;

 
 

-               return true;
+       var aFunction$a = function (variable) {
+         return typeof variable == 'function' ? variable : undefined;

        };
 
        };
 

-       var isSymbol = function (x) {
-               if (!x) { return false; }
-               if (typeof x === 'symbol') { return true; }
-               if (!x.constructor) { return false; }
-               if (x.constructor.name !== 'Symbol') { return false; }
-               return (x[x.constructor.toStringTag] === 'Symbol');
+       var getBuiltIn$9 = function (namespace, method) {
+         return arguments.length < 2 ? aFunction$a(path$1[namespace]) || aFunction$a(global$x[namespace])
+           : path$1[namespace] && path$1[namespace][method] || global$x[namespace] && global$x[namespace][method];

        };
 
        };
 

-       var validateSymbol = function (value) {
-               if (!isSymbol(value)) { throw new TypeError(value + " is not a symbol"); }
-               return value;
-       };
+       var objectGetOwnPropertyNames = {};

 
 

-       var create$3 = Object.create, defineProperties = Object.defineProperties
-         , defineProperty$1 = Object.defineProperty, objPrototype = Object.prototype
-         , NativeSymbol, SymbolPolyfill, HiddenSymbol, globalSymbols = create$3(null)
-         , isNativeSafe;
-
-       if (typeof Symbol === 'function') {
-               NativeSymbol = Symbol;
-               try {
-                       String(NativeSymbol());
-                       isNativeSafe = true;
-               } catch (ignore) {}
-       }
-
-       var generateName = (function () {
-               var created = create$3(null);
-               return function (desc) {
-                       var postfix = 0, name, ie11BugWorkaround;
-                       while (created[desc + (postfix || '')]) { ++postfix; }
-                       desc += (postfix || '');
-                       created[desc] = true;
-                       name = '@@' + desc;
-                       defineProperty$1(objPrototype, name, d_1.gs(null, function (value) {
-                               // For IE11 issue see:
-                               // https://connect.microsoft.com/IE/feedbackdetail/view/1928508/
-                               //    ie11-broken-getters-on-dom-objects
-                               // https://github.com/medikoo/es6-symbol/issues/12
-                               if (ie11BugWorkaround) { return; }
-                               ie11BugWorkaround = true;
-                               defineProperty$1(this, name, d_1(value));
-                               ie11BugWorkaround = false;
-                       }));
-                       return name;
-               };
-       }());
-
-       // Internal constructor (not one exposed) for creating Symbol instances.
-       // This one is used to ensure that `someSymbol instanceof Symbol` always return false
-       HiddenSymbol = function Symbol(description) {
-               if (this instanceof HiddenSymbol) { throw new TypeError('Symbol is not a constructor'); }
-               return SymbolPolyfill(description);
-       };
+       var ceil$1 = Math.ceil;
+       var floor$7 = Math.floor;

 
 

-       // Exposed `Symbol` constructor
-       // (returns instances of HiddenSymbol)
-       var polyfill = SymbolPolyfill = function Symbol(description) {
-               var symbol;
-               if (this instanceof Symbol) { throw new TypeError('Symbol is not a constructor'); }
-               if (isNativeSafe) { return NativeSymbol(description); }
-               symbol = create$3(HiddenSymbol.prototype);
-               description = (description === undefined ? '' : String(description));
-               return defineProperties(symbol, {
-                       __description__: d_1('', description),
-                       __name__: d_1('', generateName(description))
-               });
+       // `ToInteger` abstract operation
+       // https://tc39.es/ecma262/#sec-tointeger
+       var toInteger$b = function (argument) {
+         return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor$7 : ceil$1)(argument);

        };
        };

-       defineProperties(SymbolPolyfill, {
-               for: d_1(function (key) {
-                       if (globalSymbols[key]) { return globalSymbols[key]; }
-                       return (globalSymbols[key] = SymbolPolyfill(String(key)));
-               }),
-               keyFor: d_1(function (s) {
-                       var key;
-                       validateSymbol(s);
-                       for (key in globalSymbols) { if (globalSymbols[key] === s) { return key; } }
-               }),
-
-               // To ensure proper interoperability with other native functions (e.g. Array.from)
-               // fallback to eventual native implementation of given symbol
-               hasInstance: d_1('', (NativeSymbol && NativeSymbol.hasInstance) || SymbolPolyfill('hasInstance')),
-               isConcatSpreadable: d_1('', (NativeSymbol && NativeSymbol.isConcatSpreadable) ||
-                       SymbolPolyfill('isConcatSpreadable')),
-               iterator: d_1('', (NativeSymbol && NativeSymbol.iterator) || SymbolPolyfill('iterator')),
-               match: d_1('', (NativeSymbol && NativeSymbol.match) || SymbolPolyfill('match')),
-               replace: d_1('', (NativeSymbol && NativeSymbol.replace) || SymbolPolyfill('replace')),
-               search: d_1('', (NativeSymbol && NativeSymbol.search) || SymbolPolyfill('search')),
-               species: d_1('', (NativeSymbol && NativeSymbol.species) || SymbolPolyfill('species')),
-               split: d_1('', (NativeSymbol && NativeSymbol.split) || SymbolPolyfill('split')),
-               toPrimitive: d_1('', (NativeSymbol && NativeSymbol.toPrimitive) || SymbolPolyfill('toPrimitive')),
-               toStringTag: d_1('', (NativeSymbol && NativeSymbol.toStringTag) || SymbolPolyfill('toStringTag')),
-               unscopables: d_1('', (NativeSymbol && NativeSymbol.unscopables) || SymbolPolyfill('unscopables'))
-       });
-
-       // Internal tweaks for real symbol producer
-       defineProperties(HiddenSymbol.prototype, {
-               constructor: d_1(SymbolPolyfill),
-               toString: d_1('', function () { return this.__name__; })
-       });
-
-       // Proper implementation of methods exposed on Symbol.prototype
-       // They won't be accessible on produced symbol instances as they derive from HiddenSymbol.prototype
-       defineProperties(SymbolPolyfill.prototype, {
-               toString: d_1(function () { return 'Symbol (' + validateSymbol(this).__description__ + ')'; }),
-               valueOf: d_1(function () { return validateSymbol(this); })
-       });
-       defineProperty$1(SymbolPolyfill.prototype, SymbolPolyfill.toPrimitive, d_1('', function () {
-               var symbol = validateSymbol(this);
-               if (typeof symbol === 'symbol') { return symbol; }
-               return symbol.toString();
-       }));
-       defineProperty$1(SymbolPolyfill.prototype, SymbolPolyfill.toStringTag, d_1('c', 'Symbol'));
-
-       // Proper implementaton of toPrimitive and toStringTag for returned symbol instances
-       defineProperty$1(HiddenSymbol.prototype, SymbolPolyfill.toStringTag,
-               d_1('c', SymbolPolyfill.prototype[SymbolPolyfill.toStringTag]));
-
-       // Note: It's important to define `toPrimitive` as last one, as some implementations
-       // implement `toPrimitive` natively without implementing `toStringTag` (or other specified symbols)
-       // And that may invoke error in definition flow:
-       // See: https://github.com/medikoo/es6-symbol/issues/13#issuecomment-164146149
-       defineProperty$1(HiddenSymbol.prototype, SymbolPolyfill.toPrimitive,
-               d_1('c', SymbolPolyfill.prototype[SymbolPolyfill.toPrimitive]));

 
 

-       var es6Symbol = isImplemented$7() ? Symbol : polyfill;
+       var toInteger$a = toInteger$b;

 
 

-       var objToString = Object.prototype.toString
-         , id = objToString.call((function () { return arguments; })());
+       var min$9 = Math.min;

 
 

-       var isArguments = function (value) { return objToString.call(value) === id; };
-
-       var objToString$1 = Object.prototype.toString, id$1 = objToString$1.call("");
-
-       var isString = function (value) {
-               return (
-                       typeof value === "string" ||
-                       (value &&
-                               typeof value === "object" &&
-                               (value instanceof String || objToString$1.call(value) === id$1)) ||
-                       false
-               );
-       };
-
-       var isImplemented$8 = function () {
-               if (typeof globalThis !== "object") { return false; }
-               if (!globalThis) { return false; }
-               return globalThis.Array === Array;
+       // `ToLength` abstract operation
+       // https://tc39.es/ecma262/#sec-tolength
+       var toLength$q = function (argument) {
+         return argument > 0 ? min$9(toInteger$a(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991

        };
 
        };
 

-       var naiveFallback = function () {
-               if (typeof self === "object" && self) { return self; }
-               if (typeof window === "object" && window) { return window; }
-               throw new Error("Unable to resolve global `this`");
-       };
-
-       var implementation = (function () {
-               if (this) { return this; }
-
-               // Unexpected strict mode (may happen if e.g. bundled into ESM module)
-
-               // Thanks @mathiasbynens -> https://mathiasbynens.be/notes/globalthis
-               // In all ES5+ engines global object inherits from Object.prototype
-               // (if you approached one that doesn't please report)
-               try {
-                       Object.defineProperty(Object.prototype, "__global__", {
-                               get: function () { return this; },
-                               configurable: true
-                       });
-               } catch (error) {
-                       // Unfortunate case of Object.prototype being sealed (via preventExtensions, seal or freeze)
-                       return naiveFallback();
-               }
-               try {
-                       // Safari case (window.__global__ is resolved with global context, but __global__ does not)
-                       if (!__global__) { return naiveFallback(); }
-                       return __global__;
-               } finally {
-                       delete Object.prototype.__global__;
-               }
-       })();
-
-       var globalThis_1 = isImplemented$8() ? globalThis : implementation;
+       var toInteger$9 = toInteger$b;

 
 

-       var validTypes$1 = { object: true, symbol: true };
+       var max$4 = Math.max;
+       var min$8 = Math.min;

 
 

-       var isImplemented$9 = function () {
-               var Symbol = globalThis_1.Symbol;
-               var symbol;
-               if (typeof Symbol !== "function") { return false; }
-               symbol = Symbol("test symbol");
-               try { String(symbol); }
-               catch (e) { return false; }
-
-               // Return 'true' also for polyfills
-               if (!validTypes$1[typeof Symbol.iterator]) { return false; }
-               if (!validTypes$1[typeof Symbol.toPrimitive]) { return false; }
-               if (!validTypes$1[typeof Symbol.toStringTag]) { return false; }
-
-               return true;
+       // Helper for a popular repeating case of the spec:
+       // Let integer be ? ToInteger(index).
+       // If integer < 0, let result be max((length + integer), 0); else let result be min(integer, length).
+       var toAbsoluteIndex$8 = function (index, length) {
+         var integer = toInteger$9(index);
+         return integer < 0 ? max$4(integer + length, 0) : min$8(integer, length);

        };
 
        };
 

-       var isSymbol$1 = function (value) {
-               if (!value) { return false; }
-               if (typeof value === "symbol") { return true; }
-               if (!value.constructor) { return false; }
-               if (value.constructor.name !== "Symbol") { return false; }
-               return value[value.constructor.toStringTag] === "Symbol";
-       };
+       var toIndexedObject$9 = toIndexedObject$b;
+       var toLength$p = toLength$q;
+       var toAbsoluteIndex$7 = toAbsoluteIndex$8;

 
 

-       var validateSymbol$1 = function (value) {
-               if (!isSymbol$1(value)) { throw new TypeError(value + " is not a symbol"); }
-               return value;
+       // `Array.prototype.{ indexOf, includes }` methods implementation
+       var createMethod$6 = function (IS_INCLUDES) {
+         return function ($this, el, fromIndex) {
+           var O = toIndexedObject$9($this);
+           var length = toLength$p(O.length);
+           var index = toAbsoluteIndex$7(fromIndex, length);
+           var value;
+           // Array#includes uses SameValueZero equality algorithm
+           // eslint-disable-next-line no-self-compare -- NaN check
+           if (IS_INCLUDES && el != el) while (length > index) {
+             value = O[index++];
+             // eslint-disable-next-line no-self-compare -- NaN check
+             if (value != value) return true;
+           // Array#indexOf ignores holes, Array#includes - not
+           } else for (;length > index; index++) {
+             if ((IS_INCLUDES || index in O) && O[index] === el) return IS_INCLUDES || index || 0;
+           } return !IS_INCLUDES && -1;
+         };

        };
 
        };
 

-       var create$4 = Object.create, defineProperty$2 = Object.defineProperty, objPrototype$1 = Object.prototype;
-
-       var created = create$4(null);
-       var generateName$1 = function (desc) {
-               var postfix = 0, name, ie11BugWorkaround;
-               while (created[desc + (postfix || "")]) { ++postfix; }
-               desc += postfix || "";
-               created[desc] = true;
-               name = "@@" + desc;
-               defineProperty$2(
-                       objPrototype$1,
-                       name,
-                       d_1.gs(null, function (value) {
-                               // For IE11 issue see:
-                               // https://connect.microsoft.com/IE/feedbackdetail/view/1928508/
-                               //    ie11-broken-getters-on-dom-objects
-                               // https://github.com/medikoo/es6-symbol/issues/12
-                               if (ie11BugWorkaround) { return; }
-                               ie11BugWorkaround = true;
-                               defineProperty$2(this, name, d_1(value));
-                               ie11BugWorkaround = false;
-                       })
-               );
-               return name;
+       var arrayIncludes = {
+         // `Array.prototype.includes` method
+         // https://tc39.es/ecma262/#sec-array.prototype.includes
+         includes: createMethod$6(true),
+         // `Array.prototype.indexOf` method
+         // https://tc39.es/ecma262/#sec-array.prototype.indexof
+         indexOf: createMethod$6(false)

        };
 
        };
 

-       var NativeSymbol$1 = globalThis_1.Symbol;
-
-       var standardSymbols = function (SymbolPolyfill) {
-               return Object.defineProperties(SymbolPolyfill, {
-                       // To ensure proper interoperability with other native functions (e.g. Array.from)
-                       // fallback to eventual native implementation of given symbol
-                       hasInstance: d_1(
-                               "", (NativeSymbol$1 && NativeSymbol$1.hasInstance) || SymbolPolyfill("hasInstance")
-                       ),
-                       isConcatSpreadable: d_1(
-                               "",
-                               (NativeSymbol$1 && NativeSymbol$1.isConcatSpreadable) ||
-                                       SymbolPolyfill("isConcatSpreadable")
-                       ),
-                       iterator: d_1("", (NativeSymbol$1 && NativeSymbol$1.iterator) || SymbolPolyfill("iterator")),
-                       match: d_1("", (NativeSymbol$1 && NativeSymbol$1.match) || SymbolPolyfill("match")),
-                       replace: d_1("", (NativeSymbol$1 && NativeSymbol$1.replace) || SymbolPolyfill("replace")),
-                       search: d_1("", (NativeSymbol$1 && NativeSymbol$1.search) || SymbolPolyfill("search")),
-                       species: d_1("", (NativeSymbol$1 && NativeSymbol$1.species) || SymbolPolyfill("species")),
-                       split: d_1("", (NativeSymbol$1 && NativeSymbol$1.split) || SymbolPolyfill("split")),
-                       toPrimitive: d_1(
-                               "", (NativeSymbol$1 && NativeSymbol$1.toPrimitive) || SymbolPolyfill("toPrimitive")
-                       ),
-                       toStringTag: d_1(
-                               "", (NativeSymbol$1 && NativeSymbol$1.toStringTag) || SymbolPolyfill("toStringTag")
-                       ),
-                       unscopables: d_1(
-                               "", (NativeSymbol$1 && NativeSymbol$1.unscopables) || SymbolPolyfill("unscopables")
-                       )
-               });
-       };
+       var has$f = has$j;
+       var toIndexedObject$8 = toIndexedObject$b;
+       var indexOf = arrayIncludes.indexOf;
+       var hiddenKeys$4 = hiddenKeys$6;

 
 

-       var registry = Object.create(null);
-
-       var symbolRegistry = function (SymbolPolyfill) {
-               return Object.defineProperties(SymbolPolyfill, {
-                       for: d_1(function (key) {
-                               if (registry[key]) { return registry[key]; }
-                               return (registry[key] = SymbolPolyfill(String(key)));
-                       }),
-                       keyFor: d_1(function (symbol) {
-                               var key;
-                               validateSymbol$1(symbol);
-                               for (key in registry) {
-                                       if (registry[key] === symbol) { return key; }
-                               }
-                               return undefined;
-                       })
-               });
+       var objectKeysInternal = function (object, names) {
+         var O = toIndexedObject$8(object);
+         var i = 0;
+         var result = [];
+         var key;
+         for (key in O) !has$f(hiddenKeys$4, key) && has$f(O, key) && result.push(key);
+         // Don't enum bug & hidden keys
+         while (names.length > i) if (has$f(O, key = names[i++])) {
+           ~indexOf(result, key) || result.push(key);
+         }
+         return result;

        };
 
        };
 

-       var NativeSymbol$2         = globalThis_1.Symbol;
-
-       var create$5 = Object.create
-         , defineProperties$1 = Object.defineProperties
-         , defineProperty$3 = Object.defineProperty;
-
-       var SymbolPolyfill$1, HiddenSymbol$1, isNativeSafe$1;
+       // IE8- don't enum bug keys
+       var enumBugKeys$3 = [
+         'constructor',
+         'hasOwnProperty',
+         'isPrototypeOf',
+         'propertyIsEnumerable',
+         'toLocaleString',
+         'toString',
+         'valueOf'
+       ];

 
 

-       if (typeof NativeSymbol$2 === "function") {
-               try {
-                       String(NativeSymbol$2());
-                       isNativeSafe$1 = true;
-               } catch (ignore) {}
-       } else {
-               NativeSymbol$2 = null;
-       }
+       var internalObjectKeys$1 = objectKeysInternal;
+       var enumBugKeys$2 = enumBugKeys$3;

 
 

-       // Internal constructor (not one exposed) for creating Symbol instances.
-       // This one is used to ensure that `someSymbol instanceof Symbol` always return false
-       HiddenSymbol$1 = function Symbol(description) {
-               if (this instanceof HiddenSymbol$1) { throw new TypeError("Symbol is not a constructor"); }
-               return SymbolPolyfill$1(description);
-       };
+       var hiddenKeys$3 = enumBugKeys$2.concat('length', 'prototype');

 
 

-       // Exposed `Symbol` constructor
-       // (returns instances of HiddenSymbol)
-       var polyfill$1 = SymbolPolyfill$1 = function Symbol(description) {
-               var symbol;
-               if (this instanceof Symbol) { throw new TypeError("Symbol is not a constructor"); }
-               if (isNativeSafe$1) { return NativeSymbol$2(description); }
-               symbol = create$5(HiddenSymbol$1.prototype);
-               description = description === undefined ? "" : String(description);
-               return defineProperties$1(symbol, {
-                       __description__: d_1("", description),
-                       __name__: d_1("", generateName$1(description))
-               });
+       // `Object.getOwnPropertyNames` method
+       // https://tc39.es/ecma262/#sec-object.getownpropertynames
+       // eslint-disable-next-line es/no-object-getownpropertynames -- safe
+       objectGetOwnPropertyNames.f = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
+         return internalObjectKeys$1(O, hiddenKeys$3);

        };
 
        };
 

-       standardSymbols(SymbolPolyfill$1);
-       symbolRegistry(SymbolPolyfill$1);
-
-       // Internal tweaks for real symbol producer
-       defineProperties$1(HiddenSymbol$1.prototype, {
-               constructor: d_1(SymbolPolyfill$1),
-               toString: d_1("", function () { return this.__name__; })
-       });
+       var objectGetOwnPropertySymbols = {};

 
 

-       // Proper implementation of methods exposed on Symbol.prototype
-       // They won't be accessible on produced symbol instances as they derive from HiddenSymbol.prototype
-       defineProperties$1(SymbolPolyfill$1.prototype, {
-               toString: d_1(function () { return "Symbol (" + validateSymbol$1(this).__description__ + ")"; }),
-               valueOf: d_1(function () { return validateSymbol$1(this); })
-       });
-       defineProperty$3(
-               SymbolPolyfill$1.prototype,
-               SymbolPolyfill$1.toPrimitive,
-               d_1("", function () {
-                       var symbol = validateSymbol$1(this);
-                       if (typeof symbol === "symbol") { return symbol; }
-                       return symbol.toString();
-               })
-       );
-       defineProperty$3(SymbolPolyfill$1.prototype, SymbolPolyfill$1.toStringTag, d_1("c", "Symbol"));
-
-       // Proper implementaton of toPrimitive and toStringTag for returned symbol instances
-       defineProperty$3(
-               HiddenSymbol$1.prototype, SymbolPolyfill$1.toStringTag,
-               d_1("c", SymbolPolyfill$1.prototype[SymbolPolyfill$1.toStringTag])
-       );
-
-       // Note: It's important to define `toPrimitive` as last one, as some implementations
-       // implement `toPrimitive` natively without implementing `toStringTag` (or other specified symbols)
-       // And that may invoke error in definition flow:
-       // See: https://github.com/medikoo/es6-symbol/issues/13#issuecomment-164146149
-       defineProperty$3(
-               HiddenSymbol$1.prototype, SymbolPolyfill$1.toPrimitive,
-               d_1("c", SymbolPolyfill$1.prototype[SymbolPolyfill$1.toPrimitive])
-       );
-
-       var es6Symbol$1 = isImplemented$9()
-               ? globalThis_1.Symbol
-               : polyfill$1;
-
-       var iteratorSymbol = es6Symbol$1.iterator
-         , isArray        = Array.isArray;
-
-       var isIterable = function (value) {
-               if (!isValue(value)) { return false; }
-               if (isArray(value)) { return true; }
-               if (isString(value)) { return true; }
-               if (isArguments(value)) { return true; }
-               return typeof value[iteratorSymbol] === "function";
-       };
+       // eslint-disable-next-line es/no-object-getownpropertysymbols -- safe
+       objectGetOwnPropertySymbols.f = Object.getOwnPropertySymbols;

 
 

-       var validIterable = function (value) {
-               if (!isIterable(value)) { throw new TypeError(value + " is not iterable"); }
-               return value;
-       };
+       var getBuiltIn$8 = getBuiltIn$9;
+       var getOwnPropertyNamesModule$1 = objectGetOwnPropertyNames;
+       var getOwnPropertySymbolsModule$2 = objectGetOwnPropertySymbols;
+       var anObject$k = anObject$m;

 
 

-       var objectToString = Object.prototype.toString;
-
-       var coerce = function (value) {
-               if (!is(value)) { return null; }
-               if (is$1(value)) {
-                       // Reject Object.prototype.toString coercion
-                       var valueToString = value.toString;
-                       if (typeof valueToString !== "function") { return null; }
-                       if (valueToString === objectToString) { return null; }
-                       // Note: It can be object coming from other realm, still as there's no ES3 and CSP compliant
-                       // way to resolve its realm's Object.prototype.toString it's left as not addressed edge case
-               }
-               try {
-                       return "" + value; // Ensure implicit coercion
-               } catch (error) {
-                       return null;
-               }
+       // all object keys, includes non-enumerable and symbols
+       var ownKeys$1 = getBuiltIn$8('Reflect', 'ownKeys') || function ownKeys(it) {
+         var keys = getOwnPropertyNamesModule$1.f(anObject$k(it));
+         var getOwnPropertySymbols = getOwnPropertySymbolsModule$2.f;
+         return getOwnPropertySymbols ? keys.concat(getOwnPropertySymbols(it)) : keys;

        };
 
        };
 

-       var safeToString = function (value) {
-               try {
-                       return value.toString();
-               } catch (error) {
-                       try { return String(value); }
-                       catch (error2) { return null; }
-               }
-       };
+       var has$e = has$j;
+       var ownKeys = ownKeys$1;
+       var getOwnPropertyDescriptorModule$3 = objectGetOwnPropertyDescriptor;
+       var definePropertyModule$6 = objectDefineProperty;

 
 

-       var reNewLine = /[\n\r\u2028\u2029]/g;
-
-       var toShortString = function (value) {
-               var string = safeToString(value);
-               if (string === null) { return "<Non-coercible to string value>"; }
-               // Trim if too long
-               if (string.length > 100) { string = string.slice(0, 99) + "…"; }
-               // Replace eventual new lines
-               string = string.replace(reNewLine, function (char) {
-                       switch (char) {
-                               case "\n":
-                                       return "\\n";
-                               case "\r":
-                                       return "\\r";
-                               case "\u2028":
-                                       return "\\u2028";
-                               case "\u2029":
-                                       return "\\u2029";
-                               /* istanbul ignore next */
-                               default:
-                                       throw new Error("Unexpected character");
-                       }
-               });
-               return string;
+       var copyConstructorProperties$2 = function (target, source) {
+         var keys = ownKeys(source);
+         var defineProperty = definePropertyModule$6.f;
+         var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule$3.f;
+         for (var i = 0; i < keys.length; i++) {
+           var key = keys[i];
+           if (!has$e(target, key)) defineProperty(target, key, getOwnPropertyDescriptor(source, key));
+         }

        };
 
        };
 

-       var resolveMessage = function (message, value) {
-               return message.replace("%v", toShortString(value));
-       };
+       var fails$J = fails$N;

 
 

-       var resolveException = function (value, defaultMessage, inputOptions) {
-               if (!is$1(inputOptions)) { throw new TypeError(resolveMessage(defaultMessage, value)); }
-               if (!is(value)) {
-                       if ("default" in inputOptions) { return inputOptions["default"]; }
-                       if (inputOptions.isOptional) { return null; }
-               }
-               var errorMessage = coerce(inputOptions.errorMessage);
-               if (!is(errorMessage)) { errorMessage = defaultMessage; }
-               throw new TypeError(resolveMessage(errorMessage, value));
-       };
+       var replacement = /#|\.prototype\./;

 
 

-       var ensure = function (value/*, options*/) {
-               if (is(value)) { return value; }
-               return resolveException(value, "Cannot use %v", arguments[1]);
+       var isForced$5 = function (feature, detection) {
+         var value = data[normalize$1(feature)];
+         return value == POLYFILL ? true
+           : value == NATIVE ? false
+           : typeof detection == 'function' ? fails$J(detection)
+           : !!detection;

        };
 
        };
 

-       var ensure$1 = function (value/*, options*/) {
-               if (is$4(value)) { return value; }
-               return resolveException(value, "%v is not a plain function", arguments[1]);
+       var normalize$1 = isForced$5.normalize = function (string) {
+         return String(string).replace(replacement, '.').toLowerCase();

        };
 
        };
 

-       var isImplemented$a = function () {
-               var from = Array.from, arr, result;
-               if (typeof from !== "function") { return false; }
-               arr = ["raz", "dwa"];
-               result = from(arr);
-               return Boolean(result && result !== arr && result[1] === "dwa");
-       };
+       var data = isForced$5.data = {};
+       var NATIVE = isForced$5.NATIVE = 'N';
+       var POLYFILL = isForced$5.POLYFILL = 'P';

 
 

-       var objToString$2 = Object.prototype.toString
-         , isFunctionStringTag = RegExp.prototype.test.bind(/^[object [A-Za-z0-9]*Function]$/);
+       var isForced_1 = isForced$5;

 
 

-       var isFunction = function (value) {
-               return typeof value === "function" && isFunctionStringTag(objToString$2.call(value));
-       };
+       var global$w = global$F;
+       var getOwnPropertyDescriptor$4 = objectGetOwnPropertyDescriptor.f;
+       var createNonEnumerableProperty$a = createNonEnumerableProperty$e;
+       var redefine$f = redefine$g.exports;
+       var setGlobal = setGlobal$3;
+       var copyConstructorProperties$1 = copyConstructorProperties$2;
+       var isForced$4 = isForced_1;

 
 

-       var iteratorSymbol$1 = es6Symbol$1.iterator
-         , isArray$1        = Array.isArray
-         , call           = Function.prototype.call
-         , desc           = { configurable: true, enumerable: true, writable: true, value: null }
-         , defineProperty$4 = Object.defineProperty;
-
-       // eslint-disable-next-line complexity, max-lines-per-function
-       var shim$7 = function (arrayLike/*, mapFn, thisArg*/) {
-               var mapFn = arguments[1]
-                 , thisArg = arguments[2]
-                 , Context
-                 , i
-                 , j
-                 , arr
-                 , length
-                 , code
-                 , iterator
-                 , result
-                 , getIterator
-                 , value;
-
-               arrayLike = Object(validValue(arrayLike));
-
-               if (isValue(mapFn)) { validCallable(mapFn); }
-               if (!this || this === Array || !isFunction(this)) {
-                       // Result: Plain array
-                       if (!mapFn) {
-                               if (isArguments(arrayLike)) {
-                                       // Source: Arguments
-                                       length = arrayLike.length;
-                                       if (length !== 1) { return Array.apply(null, arrayLike); }
-                                       arr = new Array(1);
-                                       arr[0] = arrayLike[0];
-                                       return arr;
-                               }
-                               if (isArray$1(arrayLike)) {
-                                       // Source: Array
-                                       arr = new Array((length = arrayLike.length));
-                                       for (i = 0; i < length; ++i) { arr[i] = arrayLike[i]; }
-                                       return arr;
-                               }
-                       }
-                       arr = [];
-               } else {
-                       // Result: Non plain array
-                       Context = this;
-               }
-
-               if (!isArray$1(arrayLike)) {
-                       if ((getIterator = arrayLike[iteratorSymbol$1]) !== undefined) {
-                               // Source: Iterator
-                               iterator = validCallable(getIterator).call(arrayLike);
-                               if (Context) { arr = new Context(); }
-                               result = iterator.next();
-                               i = 0;
-                               while (!result.done) {
-                                       value = mapFn ? call.call(mapFn, thisArg, result.value, i) : result.value;
-                                       if (Context) {
-                                               desc.value = value;
-                                               defineProperty$4(arr, i, desc);
-                                       } else {
-                                               arr[i] = value;
-                                       }
-                                       result = iterator.next();
-                                       ++i;
-                               }
-                               length = i;
-                       } else if (isString(arrayLike)) {
-                               // Source: String
-                               length = arrayLike.length;
-                               if (Context) { arr = new Context(); }
-                               for (i = 0, j = 0; i < length; ++i) {
-                                       value = arrayLike[i];
-                                       if (i + 1 < length) {
-                                               code = value.charCodeAt(0);
-                                               // eslint-disable-next-line max-depth
-                                               if (code >= 0xd800 && code <= 0xdbff) { value += arrayLike[++i]; }
-                                       }
-                                       value = mapFn ? call.call(mapFn, thisArg, value, j) : value;
-                                       if (Context) {
-                                               desc.value = value;
-                                               defineProperty$4(arr, j, desc);
-                                       } else {
-                                               arr[j] = value;
-                                       }
-                                       ++j;
-                               }
-                               length = j;
-                       }
-               }
-               if (length === undefined) {
-                       // Source: array or array-like
-                       length = toPosInteger(arrayLike.length);
-                       if (Context) { arr = new Context(length); }
-                       for (i = 0; i < length; ++i) {
-                               value = mapFn ? call.call(mapFn, thisArg, arrayLike[i], i) : arrayLike[i];
-                               if (Context) {
-                                       desc.value = value;
-                                       defineProperty$4(arr, i, desc);
-                               } else {
-                                       arr[i] = value;
-                               }
-                       }
-               }
-               if (Context) {
-                       desc.value = null;
-                       arr.length = length;
-               }
-               return arr;
+       /*
+         options.target      - name of the target object
+         options.global      - target is the global object
+         options.stat        - export as static methods of target
+         options.proto       - export as prototype methods of target
+         options.real        - real prototype method for the `pure` version
+         options.forced      - export even if the native feature is available
+         options.bind        - bind methods to the target, required for the `pure` version
+         options.wrap        - wrap constructors to preventing global pollution, required for the `pure` version
+         options.unsafe      - use the simple assignment of property instead of delete + defineProperty
+         options.sham        - add a flag to not completely full polyfills
+         options.enumerable  - export as enumerable property
+         options.noTargetGet - prevent calling a getter on target
+       */
+       var _export = function (options, source) {
+         var TARGET = options.target;
+         var GLOBAL = options.global;
+         var STATIC = options.stat;
+         var FORCED, target, key, targetProperty, sourceProperty, descriptor;
+         if (GLOBAL) {
+           target = global$w;
+         } else if (STATIC) {
+           target = global$w[TARGET] || setGlobal(TARGET, {});
+         } else {
+           target = (global$w[TARGET] || {}).prototype;
+         }
+         if (target) for (key in source) {
+           sourceProperty = source[key];
+           if (options.noTargetGet) {
+             descriptor = getOwnPropertyDescriptor$4(target, key);
+             targetProperty = descriptor && descriptor.value;
+           } else targetProperty = target[key];
+           FORCED = isForced$4(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);
+           // contained in target
+           if (!FORCED && targetProperty !== undefined) {
+             if (typeof sourceProperty === typeof targetProperty) continue;
+             copyConstructorProperties$1(sourceProperty, targetProperty);
+           }
+           // add a flag to not completely full polyfills
+           if (options.sham || (targetProperty && targetProperty.sham)) {
+             createNonEnumerableProperty$a(sourceProperty, 'sham', true);
+           }
+           // extend global
+           redefine$f(target, key, sourceProperty, options);
+         }

        };
 
        };
 

-       var from_1 = isImplemented$a() ? Array.from : shim$7;
-
-       var copy = function (obj/*, propertyNames, options*/) {
-               var copy = Object(validValue(obj)), propertyNames = arguments[1], options = Object(arguments[2]);
-               if (copy !== obj && !propertyNames) { return copy; }
-               var result = {};
-               if (propertyNames) {
-                       from_1(propertyNames, function (propertyName) {
-                               if (options.ensure || propertyName in obj) { result[propertyName] = obj[propertyName]; }
-                       });
-               } else {
-                       assign(result, obj);
-               }
-               return result;
-       };
+       var $$16 = _export;

 
 

-       var bind                    = Function.prototype.bind
-         , call$1                    = Function.prototype.call
-         , keys$2                    = Object.keys
-         , objPropertyIsEnumerable = Object.prototype.propertyIsEnumerable;
-
-       var _iterate = function (method, defVal) {
-               return function (obj, cb/*, thisArg, compareFn*/) {
-                       var list, thisArg = arguments[2], compareFn = arguments[3];
-                       obj = Object(validValue(obj));
-                       validCallable(cb);
-
-                       list = keys$2(obj);
-                       if (compareFn) {
-                               list.sort(typeof compareFn === "function" ? bind.call(compareFn, obj) : undefined);
-                       }
-                       if (typeof method !== "function") { method = list[method]; }
-                       return call$1.call(method, list, function (key, index) {
-                               if (!objPropertyIsEnumerable.call(obj, key)) { return defVal; }
-                               return call$1.call(cb, thisArg, obj[key], key, obj, index);
-                       });
-               };
-       };
+       // `Date.now` method
+       // https://tc39.es/ecma262/#sec-date.now
+       $$16({ target: 'Date', stat: true }, {
+         now: function now() {
+           return new Date().getTime();
+         }
+       });

 
 

-       var forEach$1 = _iterate("forEach");
+       var redefine$e = redefine$g.exports;
+
+       var DatePrototype$1 = Date.prototype;
+       var INVALID_DATE = 'Invalid Date';
+       var TO_STRING$1 = 'toString';
+       var nativeDateToString = DatePrototype$1[TO_STRING$1];
+       var getTime$1 = DatePrototype$1.getTime;
+
+       // `Date.prototype.toString` method
+       // https://tc39.es/ecma262/#sec-date.prototype.tostring
+       if (new Date(NaN) + '' != INVALID_DATE) {
+         redefine$e(DatePrototype$1, TO_STRING$1, function toString() {
+           var value = getTime$1.call(this);
+           // eslint-disable-next-line no-self-compare -- NaN check
+           return value === value ? nativeDateToString.call(this) : INVALID_DATE;
+         });
+       }

 
 

-       var call$2     = Function.prototype.call;
+       function _typeof(obj) {
+         "@babel/helpers - typeof";

 
 

-       var map$1 = function (obj, cb/*, thisArg*/) {
-               var result = {}, thisArg = arguments[2];
-               validCallable(cb);
-               forEach$1(obj, function (value, key, targetObj, index) {
-                       result[key] = call$2.call(cb, thisArg, value, key, targetObj, index);
-               });
-               return result;
-       };
+         if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
+           _typeof = function (obj) {
+             return typeof obj;
+           };
+         } else {
+           _typeof = function (obj) {
+             return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+           };
+         }

 
 

-       var bind$1 = Function.prototype.bind
-         , defineProperty$5 = Object.defineProperty
-         , hasOwnProperty$1 = Object.prototype.hasOwnProperty
-         , define;
-
-       define = function (name, desc, options) {
-               var value = ensure(desc) && ensure$1(desc.value), dgs;
-               dgs = copy(desc);
-               delete dgs.writable;
-               delete dgs.value;
-               dgs.get = function () {
-                       if (!options.overwriteDefinition && hasOwnProperty$1.call(this, name)) { return value; }
-                       desc.value = bind$1.call(value, options.resolveContext ? options.resolveContext(this) : this);
-                       defineProperty$5(this, name, desc);
-                       return this[name];
-               };
-               return dgs;
-       };
+         return _typeof(obj);
+       }

 
 

-       var autoBind = function (props/*, options*/) {
-               var options = normalizeOptions(arguments[1]);
-               if (is(options.resolveContext)) { ensure$1(options.resolveContext); }
-               return map$1(props, function (desc, name) { return define(name, desc, options); });
-       };
+       function _classCallCheck$1(instance, Constructor) {
+         if (!(instance instanceof Constructor)) {
+           throw new TypeError("Cannot call a class as a function");
+         }
+       }

 
 

-       var defineProperty$6 = Object.defineProperty, defineProperties$2 = Object.defineProperties, Iterator;
-
-       var es6Iterator = Iterator = function (list, context) {
-               if (!(this instanceof Iterator)) { throw new TypeError("Constructor requires 'new'"); }
-               defineProperties$2(this, {
-                       __list__: d_1("w", validValue(list)),
-                       __context__: d_1("w", context),
-                       __nextIndex__: d_1("w", 0)
-               });
-               if (!context) { return; }
-               validCallable(context.on);
-               context.on("_add", this._onAdd);
-               context.on("_delete", this._onDelete);
-               context.on("_clear", this._onClear);
-       };
+       function _defineProperties$1(target, props) {
+         for (var i = 0; i < props.length; i++) {
+           var descriptor = props[i];
+           descriptor.enumerable = descriptor.enumerable || false;
+           descriptor.configurable = true;
+           if ("value" in descriptor) descriptor.writable = true;
+           Object.defineProperty(target, descriptor.key, descriptor);
+         }
+       }

 
 

-       // Internal %IteratorPrototype% doesn't expose its constructor
-       delete Iterator.prototype.constructor;
-
-       defineProperties$2(
-               Iterator.prototype,
-               assign(
-                       {
-                               _next: d_1(function () {
-                                       var i;
-                                       if (!this.__list__) { return undefined; }
-                                       if (this.__redo__) {
-                                               i = this.__redo__.shift();
-                                               if (i !== undefined) { return i; }
-                                       }
-                                       if (this.__nextIndex__ < this.__list__.length) { return this.__nextIndex__++; }
-                                       this._unBind();
-                                       return undefined;
-                               }),
-                               next: d_1(function () {
-                                       return this._createResult(this._next());
-                               }),
-                               _createResult: d_1(function (i) {
-                                       if (i === undefined) { return { done: true, value: undefined }; }
-                                       return { done: false, value: this._resolve(i) };
-                               }),
-                               _resolve: d_1(function (i) {
-                                       return this.__list__[i];
-                               }),
-                               _unBind: d_1(function () {
-                                       this.__list__ = null;
-                                       delete this.__redo__;
-                                       if (!this.__context__) { return; }
-                                       this.__context__.off("_add", this._onAdd);
-                                       this.__context__.off("_delete", this._onDelete);
-                                       this.__context__.off("_clear", this._onClear);
-                                       this.__context__ = null;
-                               }),
-                               toString: d_1(function () {
-                                       return "[object " + (this[es6Symbol$1.toStringTag] || "Object") + "]";
-                               })
-                       },
-                       autoBind({
-                               _onAdd: d_1(function (index) {
-                                       if (index >= this.__nextIndex__) { return; }
-                                       ++this.__nextIndex__;
-                                       if (!this.__redo__) {
-                                               defineProperty$6(this, "__redo__", d_1("c", [index]));
-                                               return;
-                                       }
-                                       this.__redo__.forEach(function (redo, i) {
-                                               if (redo >= index) { this.__redo__[i] = ++redo; }
-                                       }, this);
-                                       this.__redo__.push(index);
-                               }),
-                               _onDelete: d_1(function (index) {
-                                       var i;
-                                       if (index >= this.__nextIndex__) { return; }
-                                       --this.__nextIndex__;
-                                       if (!this.__redo__) { return; }
-                                       i = this.__redo__.indexOf(index);
-                                       if (i !== -1) { this.__redo__.splice(i, 1); }
-                                       this.__redo__.forEach(function (redo, j) {
-                                               if (redo > index) { this.__redo__[j] = --redo; }
-                                       }, this);
-                               }),
-                               _onClear: d_1(function () {
-                                       if (this.__redo__) { clear.call(this.__redo__); }
-                                       this.__nextIndex__ = 0;
-                               })
-                       })
-               )
-       );
-
-       defineProperty$6(
-               Iterator.prototype,
-               es6Symbol$1.iterator,
-               d_1(function () {
-                       return this;
-               })
-       );
-
-       var array = createCommonjsModule(function (module) {
-
-
-
-       var defineProperty = Object.defineProperty, ArrayIterator;
-
-       ArrayIterator = module.exports = function (arr, kind) {
-               if (!(this instanceof ArrayIterator)) { throw new TypeError("Constructor requires 'new'"); }
-               es6Iterator.call(this, arr);
-               if (!kind) { kind = "value"; }
-               else if (contains.call(kind, "key+value")) { kind = "key+value"; }
-               else if (contains.call(kind, "key")) { kind = "key"; }
-               else { kind = "value"; }
-               defineProperty(this, "__kind__", d_1("", kind));
-       };
-       if (setPrototypeOf) { setPrototypeOf(ArrayIterator, es6Iterator); }
+       function _createClass$1(Constructor, protoProps, staticProps) {
+         if (protoProps) _defineProperties$1(Constructor.prototype, protoProps);
+         if (staticProps) _defineProperties$1(Constructor, staticProps);
+         return Constructor;
+       }

 
 

-       // Internal %ArrayIteratorPrototype% doesn't expose its constructor
-       delete ArrayIterator.prototype.constructor;
+       function _defineProperty(obj, key, value) {
+         if (key in obj) {
+           Object.defineProperty(obj, key, {
+             value: value,
+             enumerable: true,
+             configurable: true,
+             writable: true
+           });
+         } else {
+           obj[key] = value;
+         }

 
 

-       ArrayIterator.prototype = Object.create(es6Iterator.prototype, {
-               _resolve: d_1(function (i) {
-                       if (this.__kind__ === "value") { return this.__list__[i]; }
-                       if (this.__kind__ === "key+value") { return [i, this.__list__[i]]; }
-                       return i;
-               })
-       });
-       defineProperty(ArrayIterator.prototype, es6Symbol$1.toStringTag, d_1("c", "Array Iterator"));
-       });
+         return obj;
+       }

 
 

-       var string = createCommonjsModule(function (module) {
+       function _slicedToArray(arr, i) {
+         return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
+       }

 
 

+       function _toConsumableArray(arr) {
+         return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
+       }

 
 

+       function _arrayWithoutHoles(arr) {
+         if (Array.isArray(arr)) return _arrayLikeToArray(arr);
+       }

 
 

-       var defineProperty = Object.defineProperty, StringIterator;
+       function _arrayWithHoles(arr) {
+         if (Array.isArray(arr)) return arr;
+       }

 
 

-       StringIterator = module.exports = function (str) {
-               if (!(this instanceof StringIterator)) { throw new TypeError("Constructor requires 'new'"); }
-               str = String(str);
-               es6Iterator.call(this, str);
-               defineProperty(this, "__length__", d_1("", str.length));
-       };
-       if (setPrototypeOf) { setPrototypeOf(StringIterator, es6Iterator); }
-
-       // Internal %ArrayIteratorPrototype% doesn't expose its constructor
-       delete StringIterator.prototype.constructor;
-
-       StringIterator.prototype = Object.create(es6Iterator.prototype, {
-               _next: d_1(function () {
-                       if (!this.__list__) { return undefined; }
-                       if (this.__nextIndex__ < this.__length__) { return this.__nextIndex__++; }
-                       this._unBind();
-                       return undefined;
-               }),
-               _resolve: d_1(function (i) {
-                       var char = this.__list__[i], code;
-                       if (this.__nextIndex__ === this.__length__) { return char; }
-                       code = char.charCodeAt(0);
-                       if (code >= 0xd800 && code <= 0xdbff) { return char + this.__list__[this.__nextIndex__++]; }
-                       return char;
-               })
-       });
-       defineProperty(StringIterator.prototype, es6Symbol$1.toStringTag, d_1("c", "String Iterator"));
-       });
+       function _iterableToArray(iter) {
+         if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter);
+       }

 
 

-       var iteratorSymbol$2 = es6Symbol$1.iterator;
+       function _iterableToArrayLimit(arr, i) {
+         var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"];

 
 

-       var get = function (obj) {
-               if (typeof validIterable(obj)[iteratorSymbol$2] === "function") { return obj[iteratorSymbol$2](); }
-               if (isArguments(obj)) { return new array(obj); }
-               if (isString(obj)) { return new string(obj); }
-               return new array(obj);
-       };
+         if (_i == null) return;
+         var _arr = [];
+         var _n = true;
+         var _d = false;

 
 

-       var isArray$2 = Array.isArray, call$3 = Function.prototype.call, some = Array.prototype.some;
-
-       var forOf = function (iterable, cb /*, thisArg*/) {
-               var mode, thisArg = arguments[2], result, doBreak, broken, i, length, char, code;
-               if (isArray$2(iterable) || isArguments(iterable)) { mode = "array"; }
-               else if (isString(iterable)) { mode = "string"; }
-               else { iterable = get(iterable); }
-
-               validCallable(cb);
-               doBreak = function () {
-                       broken = true;
-               };
-               if (mode === "array") {
-                       some.call(iterable, function (value) {
-                               call$3.call(cb, thisArg, value, doBreak);
-                               return broken;
-                       });
-                       return;
-               }
-               if (mode === "string") {
-                       length = iterable.length;
-                       for (i = 0; i < length; ++i) {
-                               char = iterable[i];
-                               if (i + 1 < length) {
-                                       code = char.charCodeAt(0);
-                                       if (code >= 0xd800 && code <= 0xdbff) { char += iterable[++i]; }
-                               }
-                               call$3.call(cb, thisArg, char, doBreak);
-                               if (broken) { break; }
-                       }
-                       return;
-               }
-               result = iterable.next();
-
-               while (!result.done) {
-                       call$3.call(cb, thisArg, result.value, doBreak);
-                       if (broken) { return; }
-                       result = iterable.next();
-               }
-       };
+         var _s, _e;

 
 

-       var iterator = createCommonjsModule(function (module) {
+         try {
+           for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) {
+             _arr.push(_s.value);

 
 

-       var toStringTagSymbol = es6Symbol.toStringTag
+             if (i && _arr.length === i) break;
+           }
+         } catch (err) {
+           _d = true;
+           _e = err;
+         } finally {
+           try {
+             if (!_n && _i["return"] != null) _i["return"]();
+           } finally {
+             if (_d) throw _e;
+           }
+         }

 
 

-         , defineProperty = Object.defineProperty
-         , SetIterator;
+         return _arr;
+       }

 
 

-       SetIterator = module.exports = function (set, kind) {
-               if (!(this instanceof SetIterator)) { return new SetIterator(set, kind); }
-               es6Iterator.call(this, set.__setData__, set);
-               if (!kind) { kind = 'value'; }
-               else if (contains.call(kind, 'key+value')) { kind = 'key+value'; }
-               else { kind = 'value'; }
-               defineProperty(this, '__kind__', d_1('', kind));
-       };
-       if (setPrototypeOf) { setPrototypeOf(SetIterator, es6Iterator); }
-
-       SetIterator.prototype = Object.create(es6Iterator.prototype, {
-               constructor: d_1(SetIterator),
-               _resolve: d_1(function (i) {
-                       if (this.__kind__ === 'value') { return this.__list__[i]; }
-                       return [this.__list__[i], this.__list__[i]];
-               }),
-               toString: d_1(function () { return '[object Set Iterator]'; })
-       });
-       defineProperty(SetIterator.prototype, toStringTagSymbol, d_1('c', 'Set Iterator'));
-       });
+       function _unsupportedIterableToArray(o, minLen) {
+         if (!o) return;
+         if (typeof o === "string") return _arrayLikeToArray(o, minLen);
+         var n = Object.prototype.toString.call(o).slice(8, -1);
+         if (n === "Object" && o.constructor) n = o.constructor.name;
+         if (n === "Map" || n === "Set") return Array.from(o);
+         if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
+       }

 
 

-       // Exports true if environment provides native `Set` implementation,
-
-       var isNativeImplemented = (function () {
-               if (typeof Set === 'undefined') { return false; }
-               return (Object.prototype.toString.call(Set.prototype) === '[object Set]');
-       }());
-
-       var iterator$1       = validIterable
-
-         , call$4 = Function.prototype.call
-         , defineProperty$7 = Object.defineProperty, getPrototypeOf$1 = Object.getPrototypeOf
-         , SetPoly, getValues, NativeSet;
-
-       if (isNativeImplemented) { NativeSet = Set; }
-
-       var polyfill$2 = SetPoly = function Set(/*iterable*/) {
-               var iterable = arguments[0], self;
-               if (!(this instanceof SetPoly)) { throw new TypeError('Constructor requires \'new\''); }
-               if (isNativeImplemented && setPrototypeOf) { self = setPrototypeOf(new NativeSet(), getPrototypeOf$1(this)); }
-               else { self = this; }
-               if (iterable != null) { iterator$1(iterable); }
-               defineProperty$7(self, '__setData__', d_1('c', []));
-               if (!iterable) { return self; }
-               forOf(iterable, function (value) {
-                       if (eIndexOf.call(this, value) !== -1) { return; }
-                       this.push(value);
-               }, self.__setData__);
-               return self;
-       };
+       function _arrayLikeToArray(arr, len) {
+         if (len == null || len > arr.length) len = arr.length;

 
 

-       if (isNativeImplemented) {
-               if (setPrototypeOf) { setPrototypeOf(SetPoly, NativeSet); }
-               SetPoly.prototype = Object.create(NativeSet.prototype, { constructor: d_1(SetPoly) });
-       }
-
-       eventEmitter(Object.defineProperties(SetPoly.prototype, {
-               add: d_1(function (value) {
-                       if (this.has(value)) { return this; }
-                       this.emit('_add', this.__setData__.push(value) - 1, value);
-                       return this;
-               }),
-               clear: d_1(function () {
-                       if (!this.__setData__.length) { return; }
-                       clear.call(this.__setData__);
-                       this.emit('_clear');
-               }),
-               delete: d_1(function (value) {
-                       var index = eIndexOf.call(this.__setData__, value);
-                       if (index === -1) { return false; }
-                       this.__setData__.splice(index, 1);
-                       this.emit('_delete', index, value);
-                       return true;
-               }),
-               entries: d_1(function () { return new iterator(this, 'key+value'); }),
-               forEach: d_1(function (cb/*, thisArg*/) {
-                       var thisArg = arguments[1], iterator, result, value;
-                       validCallable(cb);
-                       iterator = this.values();
-                       result = iterator._next();
-                       while (result !== undefined) {
-                               value = iterator._resolve(result);
-                               call$4.call(cb, thisArg, value, value, this);
-                               result = iterator._next();
-                       }
-               }),
-               has: d_1(function (value) {
-                       return (eIndexOf.call(this.__setData__, value) !== -1);
-               }),
-               keys: d_1(getValues = function () { return this.values(); }),
-               size: d_1.gs(function () { return this.__setData__.length; }),
-               values: d_1(function () { return new iterator(this); }),
-               toString: d_1(function () { return '[object Set]'; })
-       }));
-       defineProperty$7(SetPoly.prototype, es6Symbol.iterator, d_1(getValues));
-       defineProperty$7(SetPoly.prototype, es6Symbol.toStringTag, d_1('c', 'Set'));
-
-       var es6Set = isImplemented() ? Set : polyfill$2;
-
-       var isImplemented$b = function () {
-               var map, iterator, result;
-               if (typeof Map !== 'function') { return false; }
-               try {
-                       // WebKit doesn't support arguments and crashes
-                       map = new Map([['raz', 'one'], ['dwa', 'two'], ['trzy', 'three']]);
-               } catch (e) {
-                       return false;
-               }
-               if (String(map) !== '[object Map]') { return false; }
-               if (map.size !== 3) { return false; }
-               if (typeof map.clear !== 'function') { return false; }
-               if (typeof map.delete !== 'function') { return false; }
-               if (typeof map.entries !== 'function') { return false; }
-               if (typeof map.forEach !== 'function') { return false; }
-               if (typeof map.get !== 'function') { return false; }
-               if (typeof map.has !== 'function') { return false; }
-               if (typeof map.keys !== 'function') { return false; }
-               if (typeof map.set !== 'function') { return false; }
-               if (typeof map.values !== 'function') { return false; }
-
-               iterator = map.entries();
-               result = iterator.next();
-               if (result.done !== false) { return false; }
-               if (!result.value) { return false; }
-               if (result.value[0] !== 'raz') { return false; }
-               if (result.value[1] !== 'one') { return false; }
-
-               return true;
-       };
+         for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];

 
 

-       var forEach$2 = Array.prototype.forEach, create$6 = Object.create;
+         return arr2;
+       }

 
 

-       // eslint-disable-next-line no-unused-vars
-       var primitiveSet = function (arg/*, …args*/) {
-               var set = create$6(null);
-               forEach$2.call(arguments, function (name) { set[name] = true; });
-               return set;
-       };
+       function _nonIterableSpread() {
+         throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+       }

 
 

-       var iteratorKinds = primitiveSet('key',
-               'value', 'key+value');
+       function _nonIterableRest() {
+         throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+       }

 
 

-       var iterator$2 = createCommonjsModule(function (module) {
+       function _createForOfIteratorHelper(o, allowArrayLike) {
+         var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];

 
 

-       var toStringTagSymbol = es6Symbol$1.toStringTag
+         if (!it) {
+           if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
+             if (it) o = it;
+             var i = 0;

 
 

-         , defineProperties = Object.defineProperties
-         , unBind = es6Iterator.prototype._unBind
-         , MapIterator;
+             var F = function () {};

 
 

-       MapIterator = module.exports = function (map, kind) {
-               if (!(this instanceof MapIterator)) { return new MapIterator(map, kind); }
-               es6Iterator.call(this, map.__mapKeysData__, map);
-               if (!kind || !iteratorKinds[kind]) { kind = 'key+value'; }
-               defineProperties(this, {
-                       __kind__: d_1('', kind),
-                       __values__: d_1('w', map.__mapValuesData__)
-               });
-       };
-       if (setPrototypeOf) { setPrototypeOf(MapIterator, es6Iterator); }
-
-       MapIterator.prototype = Object.create(es6Iterator.prototype, {
-               constructor: d_1(MapIterator),
-               _resolve: d_1(function (i) {
-                       if (this.__kind__ === 'value') { return this.__values__[i]; }
-                       if (this.__kind__ === 'key') { return this.__list__[i]; }
-                       return [this.__list__[i], this.__values__[i]];
-               }),
-               _unBind: d_1(function () {
-                       this.__values__ = null;
-                       unBind.call(this);
-               }),
-               toString: d_1(function () { return '[object Map Iterator]'; })
-       });
-       Object.defineProperty(MapIterator.prototype, toStringTagSymbol,
-               d_1('c', 'Map Iterator'));
-       });
+             return {
+               s: F,
+               n: function () {
+                 if (i >= o.length) return {
+                   done: true
+                 };
+                 return {
+                   done: false,
+                   value: o[i++]
+                 };
+               },
+               e: function (e) {
+                 throw e;
+               },
+               f: F
+             };
+           }

 
 

-       // Exports true if environment provides native `Map` implementation,
-
-       var isNativeImplemented$1 = (function () {
-               if (typeof Map === 'undefined') { return false; }
-               return (Object.prototype.toString.call(new Map()) === '[object Map]');
-       }());
-
-       var iterator$3       = validIterable
-
-         , call$5 = Function.prototype.call
-         , defineProperties$3 = Object.defineProperties, getPrototypeOf$2 = Object.getPrototypeOf
-         , MapPoly;
-
-       var polyfill$3 = MapPoly = function (/*iterable*/) {
-               var iterable = arguments[0], keys, values, self;
-               if (!(this instanceof MapPoly)) { throw new TypeError('Constructor requires \'new\''); }
-               if (isNativeImplemented$1 && setPrototypeOf && (Map !== MapPoly)) {
-                       self = setPrototypeOf(new Map(), getPrototypeOf$2(this));
-               } else {
-                       self = this;
-               }
-               if (iterable != null) { iterator$3(iterable); }
-               defineProperties$3(self, {
-                       __mapKeysData__: d_1('c', keys = []),
-                       __mapValuesData__: d_1('c', values = [])
-               });
-               if (!iterable) { return self; }
-               forOf(iterable, function (value) {
-                       var key = validValue(value)[0];
-                       value = value[1];
-                       if (eIndexOf.call(keys, key) !== -1) { return; }
-                       keys.push(key);
-                       values.push(value);
-               }, self);
-               return self;
-       };
+           throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+         }

 
 

-       if (isNativeImplemented$1) {
-               if (setPrototypeOf) { setPrototypeOf(MapPoly, Map); }
-               MapPoly.prototype = Object.create(Map.prototype, {
-                       constructor: d_1(MapPoly)
-               });
-       }
-
-       eventEmitter(defineProperties$3(MapPoly.prototype, {
-               clear: d_1(function () {
-                       if (!this.__mapKeysData__.length) { return; }
-                       clear.call(this.__mapKeysData__);
-                       clear.call(this.__mapValuesData__);
-                       this.emit('_clear');
-               }),
-               delete: d_1(function (key) {
-                       var index = eIndexOf.call(this.__mapKeysData__, key);
-                       if (index === -1) { return false; }
-                       this.__mapKeysData__.splice(index, 1);
-                       this.__mapValuesData__.splice(index, 1);
-                       this.emit('_delete', index, key);
-                       return true;
-               }),
-               entries: d_1(function () { return new iterator$2(this, 'key+value'); }),
-               forEach: d_1(function (cb/*, thisArg*/) {
-                       var thisArg = arguments[1], iterator, result;
-                       validCallable(cb);
-                       iterator = this.entries();
-                       result = iterator._next();
-                       while (result !== undefined) {
-                               call$5.call(cb, thisArg, this.__mapValuesData__[result],
-                                       this.__mapKeysData__[result], this);
-                               result = iterator._next();
-                       }
-               }),
-               get: d_1(function (key) {
-                       var index = eIndexOf.call(this.__mapKeysData__, key);
-                       if (index === -1) { return; }
-                       return this.__mapValuesData__[index];
-               }),
-               has: d_1(function (key) {
-                       return (eIndexOf.call(this.__mapKeysData__, key) !== -1);
-               }),
-               keys: d_1(function () { return new iterator$2(this, 'key'); }),
-               set: d_1(function (key, value) {
-                       var index = eIndexOf.call(this.__mapKeysData__, key), emit;
-                       if (index === -1) {
-                               index = this.__mapKeysData__.push(key) - 1;
-                               emit = true;
-                       }
-                       this.__mapValuesData__[index] = value;
-                       if (emit) { this.emit('_add', index, key); }
-                       return this;
-               }),
-               size: d_1.gs(function () { return this.__mapKeysData__.length; }),
-               values: d_1(function () { return new iterator$2(this, 'value'); }),
-               toString: d_1(function () { return '[object Map]'; })
-       }));
-       Object.defineProperty(MapPoly.prototype, es6Symbol$1.iterator, d_1(function () {
-               return this.entries();
-       }));
-       Object.defineProperty(MapPoly.prototype, es6Symbol$1.toStringTag, d_1('c', 'Map'));
-
-       var es6Map = isImplemented$b() ? Map : polyfill$3;
-
-       var toStr = Object.prototype.toString;
-
-       var isArguments$1 = function isArguments(value) {
-               var str = toStr.call(value);
-               var isArgs = str === '[object Arguments]';
-               if (!isArgs) {
-                       isArgs = str !== '[object Array]' &&
-                               value !== null &&
-                               typeof value === 'object' &&
-                               typeof value.length === 'number' &&
-                               value.length >= 0 &&
-                               toStr.call(value.callee) === '[object Function]';
-               }
-               return isArgs;
-       };
+         var normalCompletion = true,
+             didErr = false,
+             err;
+         return {
+           s: function () {
+             it = it.call(o);
+           },
+           n: function () {
+             var step = it.next();
+             normalCompletion = step.done;
+             return step;
+           },
+           e: function (e) {
+             didErr = true;
+             err = e;
+           },
+           f: function () {
+             try {
+               if (!normalCompletion && it.return != null) it.return();
+             } finally {
+               if (didErr) throw err;
+             }
+           }
+         };
+       }

 
 

-       var keysShim;
-       if (!Object.keys) {
-               // modified from https://github.com/es-shims/es5-shim
-               var has = Object.prototype.hasOwnProperty;
-               var toStr$1 = Object.prototype.toString;
-               var isArgs = isArguments$1; // eslint-disable-line global-require
-               var isEnumerable = Object.prototype.propertyIsEnumerable;
-               var hasDontEnumBug = !isEnumerable.call({ toString: null }, 'toString');
-               var hasProtoEnumBug = isEnumerable.call(function () {}, 'prototype');
-               var dontEnums = [
-                       'toString',
-                       'toLocaleString',
-                       'valueOf',
-                       'hasOwnProperty',
-                       'isPrototypeOf',
-                       'propertyIsEnumerable',
-                       'constructor'
-               ];
-               var equalsConstructorPrototype = function (o) {
-                       var ctor = o.constructor;
-                       return ctor && ctor.prototype === o;
-               };
-               var excludedKeys = {
-                       $applicationCache: true,
-                       $console: true,
-                       $external: true,
-                       $frame: true,
-                       $frameElement: true,
-                       $frames: true,
-                       $innerHeight: true,
-                       $innerWidth: true,
-                       $onmozfullscreenchange: true,
-                       $onmozfullscreenerror: true,
-                       $outerHeight: true,
-                       $outerWidth: true,
-                       $pageXOffset: true,
-                       $pageYOffset: true,
-                       $parent: true,
-                       $scrollLeft: true,
-                       $scrollTop: true,
-                       $scrollX: true,
-                       $scrollY: true,
-                       $self: true,
-                       $webkitIndexedDB: true,
-                       $webkitStorageInfo: true,
-                       $window: true
-               };
-               var hasAutomationEqualityBug = (function () {
-                       /* global window */
-                       if (typeof window === 'undefined') { return false; }
-                       for (var k in window) {
-                               try {
-                                       if (!excludedKeys['$' + k] && has.call(window, k) && window[k] !== null && typeof window[k] === 'object') {
-                                               try {
-                                                       equalsConstructorPrototype(window[k]);
-                                               } catch (e) {
-                                                       return true;
-                                               }
-                                       }
-                               } catch (e$1) {
-                                       return true;
-                               }
-                       }
-                       return false;
-               }());
-               var equalsConstructorPrototypeIfNotBuggy = function (o) {
-                       /* global window */
-                       if (typeof window === 'undefined' || !hasAutomationEqualityBug) {
-                               return equalsConstructorPrototype(o);
-                       }
-                       try {
-                               return equalsConstructorPrototype(o);
-                       } catch (e) {
-                               return false;
-                       }
-               };
-
-               keysShim = function keys(object) {
-                       var isObject = object !== null && typeof object === 'object';
-                       var isFunction = toStr$1.call(object) === '[object Function]';
-                       var isArguments = isArgs(object);
-                       var isString = isObject && toStr$1.call(object) === '[object String]';
-                       var theKeys = [];
-
-                       if (!isObject && !isFunction && !isArguments) {
-                               throw new TypeError('Object.keys called on a non-object');
-                       }
-
-                       var skipProto = hasProtoEnumBug && isFunction;
-                       if (isString && object.length > 0 && !has.call(object, 0)) {
-                               for (var i = 0; i < object.length; ++i) {
-                                       theKeys.push(String(i));
-                               }
-                       }
-
-                       if (isArguments && object.length > 0) {
-                               for (var j = 0; j < object.length; ++j) {
-                                       theKeys.push(String(j));
-                               }
-                       } else {
-                               for (var name in object) {
-                                       if (!(skipProto && name === 'prototype') && has.call(object, name)) {
-                                               theKeys.push(String(name));
-                                       }
-                               }
-                       }
-
-                       if (hasDontEnumBug) {
-                               var skipConstructor = equalsConstructorPrototypeIfNotBuggy(object);
-
-                               for (var k = 0; k < dontEnums.length; ++k) {
-                                       if (!(skipConstructor && dontEnums[k] === 'constructor') && has.call(object, dontEnums[k])) {
-                                               theKeys.push(dontEnums[k]);
-                                       }
-                               }
-                       }
-                       return theKeys;
-               };
-       }
-       var implementation$1 = keysShim;
-
-       var slice = Array.prototype.slice;
-
-
-       var origKeys = Object.keys;
-       var keysShim$1 = origKeys ? function keys(o) { return origKeys(o); } : implementation$1;
-
-       var originalKeys = Object.keys;
-
-       keysShim$1.shim = function shimObjectKeys() {
-               if (Object.keys) {
-                       var keysWorksWithArguments = (function () {
-                               // Safari 5.0 bug
-                               var args = Object.keys(arguments);
-                               return args && args.length === arguments.length;
-                       }(1, 2));
-                       if (!keysWorksWithArguments) {
-                               Object.keys = function keys(object) { // eslint-disable-line func-name-matching
-                                       if (isArguments$1(object)) {
-                                               return originalKeys(slice.call(object));
-                                       }
-                                       return originalKeys(object);
-                               };
-                       }
-               } else {
-                       Object.keys = keysShim$1;
-               }
-               return Object.keys || keysShim$1;
-       };
+       var wellKnownSymbolWrapped = {};

 
 

-       var objectKeys = keysShim$1;
+       var getBuiltIn$7 = getBuiltIn$9;

 
 

-       var hasSymbols = typeof Symbol === 'function' && typeof Symbol('foo') === 'symbol';
+       var engineUserAgent = getBuiltIn$7('navigator', 'userAgent') || '';

 
 

-       var toStr$2 = Object.prototype.toString;
-       var concat = Array.prototype.concat;
-       var origDefineProperty = Object.defineProperty;
+       var global$v = global$F;
+       var userAgent$5 = engineUserAgent;

 
 

-       var isFunction$1 = function (fn) {
-               return typeof fn === 'function' && toStr$2.call(fn) === '[object Function]';
-       };
+       var process$4 = global$v.process;
+       var versions = process$4 && process$4.versions;
+       var v8 = versions && versions.v8;
+       var match, version$1;

 
 

-       var arePropertyDescriptorsSupported = function () {
-               var obj = {};
-               try {
-                       origDefineProperty(obj, 'x', { enumerable: false, value: obj });
-                       // eslint-disable-next-line no-unused-vars, no-restricted-syntax
-                       for (var _ in obj) { // jscs:ignore disallowUnusedVariables
-                               return false;
-                       }
-                       return obj.x === obj;
-               } catch (e) { /* this is IE 8. */
-                       return false;
-               }
-       };
-       var supportsDescriptors = origDefineProperty && arePropertyDescriptorsSupported();
-
-       var defineProperty$8 = function (object, name, value, predicate) {
-               if (name in object && (!isFunction$1(predicate) || !predicate())) {
-                       return;
-               }
-               if (supportsDescriptors) {
-                       origDefineProperty(object, name, {
-                               configurable: true,
-                               enumerable: false,
-                               value: value,
-                               writable: true
-                       });
-               } else {
-                       object[name] = value;
-               }
-       };
+       if (v8) {
+         match = v8.split('.');
+         version$1 = match[0] < 4 ? 1 : match[0] + match[1];
+       } else if (userAgent$5) {
+         match = userAgent$5.match(/Edge\/(\d+)/);
+         if (!match || match[1] >= 74) {
+           match = userAgent$5.match(/Chrome\/(\d+)/);
+           if (match) version$1 = match[1];
+         }
+       }

 
 

-       var defineProperties$4 = function (object, map) {
-               var predicates = arguments.length > 2 ? arguments[2] : {};
-               var props = objectKeys(map);
-               if (hasSymbols) {
-                       props = concat.call(props, Object.getOwnPropertySymbols(map));
-               }
-               for (var i = 0; i < props.length; i += 1) {
-                       defineProperty$8(object, props[i], map[props[i]], predicates[props[i]]);
-               }
-       };
+       var engineV8Version = version$1 && +version$1;

 
 

-       defineProperties$4.supportsDescriptors = !!supportsDescriptors;
+       /* eslint-disable es/no-symbol -- required for testing */

 
 

-       var defineProperties_1 = defineProperties$4;
+       var V8_VERSION$3 = engineV8Version;
+       var fails$I = fails$N;

 
 

-       /* eslint complexity: [2, 18], max-statements: [2, 33] */
-       var shams = function hasSymbols() {
-               if (typeof Symbol !== 'function' || typeof Object.getOwnPropertySymbols !== 'function') { return false; }
-               if (typeof Symbol.iterator === 'symbol') { return true; }
+       // eslint-disable-next-line es/no-object-getownpropertysymbols -- required for testing
+       var nativeSymbol = !!Object.getOwnPropertySymbols && !fails$I(function () {
+         var symbol = Symbol();
+         // Chrome 38 Symbol has incorrect toString conversion
+         // `get-own-property-symbols` polyfill symbols converted to object are not Symbol instances
+         return !String(symbol) || !(Object(symbol) instanceof Symbol) ||
+           // Chrome 38-40 symbols are not inherited from DOM collections prototypes to instances
+           !Symbol.sham && V8_VERSION$3 && V8_VERSION$3 < 41;
+       });

 
 

-               var obj = {};
-               var sym = Symbol('test');
-               var symObj = Object(sym);
-               if (typeof sym === 'string') { return false; }
+       /* eslint-disable es/no-symbol -- required for testing */

 
 

-               if (Object.prototype.toString.call(sym) !== '[object Symbol]') { return false; }
-               if (Object.prototype.toString.call(symObj) !== '[object Symbol]') { return false; }
+       var NATIVE_SYMBOL$2 = nativeSymbol;

 
 

-               // temp disabled per https://github.com/ljharb/object.assign/issues/17
-               // if (sym instanceof Symbol) { return false; }
-               // temp disabled per https://github.com/WebReflection/get-own-property-symbols/issues/4
-               // if (!(symObj instanceof Symbol)) { return false; }
+       var useSymbolAsUid = NATIVE_SYMBOL$2
+         && !Symbol.sham
+         && typeof Symbol.iterator == 'symbol';

 
 

-               // if (typeof Symbol.prototype.toString !== 'function') { return false; }
-               // if (String(sym) !== Symbol.prototype.toString.call(sym)) { return false; }
+       var global$u = global$F;
+       var shared$2 = shared$5.exports;
+       var has$d = has$j;
+       var uid$3 = uid$5;
+       var NATIVE_SYMBOL$1 = nativeSymbol;
+       var USE_SYMBOL_AS_UID$1 = useSymbolAsUid;

 
 

-               var symVal = 42;
-               obj[sym] = symVal;
-               for (sym in obj) { return false; } // eslint-disable-line no-restricted-syntax
-               if (typeof Object.keys === 'function' && Object.keys(obj).length !== 0) { return false; }
+       var WellKnownSymbolsStore$1 = shared$2('wks');
+       var Symbol$1 = global$u.Symbol;
+       var createWellKnownSymbol = USE_SYMBOL_AS_UID$1 ? Symbol$1 : Symbol$1 && Symbol$1.withoutSetter || uid$3;

 
 

-               if (typeof Object.getOwnPropertyNames === 'function' && Object.getOwnPropertyNames(obj).length !== 0) { return false; }
+       var wellKnownSymbol$s = function (name) {
+         if (!has$d(WellKnownSymbolsStore$1, name) || !(NATIVE_SYMBOL$1 || typeof WellKnownSymbolsStore$1[name] == 'string')) {
+           if (NATIVE_SYMBOL$1 && has$d(Symbol$1, name)) {
+             WellKnownSymbolsStore$1[name] = Symbol$1[name];
+           } else {
+             WellKnownSymbolsStore$1[name] = createWellKnownSymbol('Symbol.' + name);
+           }
+         } return WellKnownSymbolsStore$1[name];
+       };

 
 

-               var syms = Object.getOwnPropertySymbols(obj);
-               if (syms.length !== 1 || syms[0] !== sym) { return false; }
+       var wellKnownSymbol$r = wellKnownSymbol$s;

 
 

-               if (!Object.prototype.propertyIsEnumerable.call(obj, sym)) { return false; }
+       wellKnownSymbolWrapped.f = wellKnownSymbol$r;

 
 

-               if (typeof Object.getOwnPropertyDescriptor === 'function') {
-                       var descriptor = Object.getOwnPropertyDescriptor(obj, sym);
-                       if (descriptor.value !== symVal || descriptor.enumerable !== true) { return false; }
-               }
+       var path = path$2;
+       var has$c = has$j;
+       var wrappedWellKnownSymbolModule$1 = wellKnownSymbolWrapped;
+       var defineProperty$a = objectDefineProperty.f;

 
 

-               return true;
+       var defineWellKnownSymbol$4 = function (NAME) {
+         var Symbol = path.Symbol || (path.Symbol = {});
+         if (!has$c(Symbol, NAME)) defineProperty$a(Symbol, NAME, {
+           value: wrappedWellKnownSymbolModule$1.f(NAME)
+         });

        };
 
        };
 

-       var origSymbol = commonjsGlobal.Symbol;
+       var defineWellKnownSymbol$3 = defineWellKnownSymbol$4;

 
 

+       // `Symbol.iterator` well-known symbol
+       // https://tc39.es/ecma262/#sec-symbol.iterator
+       defineWellKnownSymbol$3('iterator');

 
 

-       var hasSymbols$1 = function hasNativeSymbols() {
-               if (typeof origSymbol !== 'function') { return false; }
-               if (typeof Symbol !== 'function') { return false; }
-               if (typeof origSymbol('foo') !== 'symbol') { return false; }
-               if (typeof Symbol('bar') !== 'symbol') { return false; }
+       var internalObjectKeys = objectKeysInternal;
+       var enumBugKeys$1 = enumBugKeys$3;

 
 

-               return shams();
+       // `Object.keys` method
+       // https://tc39.es/ecma262/#sec-object.keys
+       // eslint-disable-next-line es/no-object-keys -- safe
+       var objectKeys$4 = Object.keys || function keys(O) {
+         return internalObjectKeys(O, enumBugKeys$1);

        };
 
        };
 

-       /* eslint no-invalid-this: 1 */
-
-       var ERROR_MESSAGE = 'Function.prototype.bind called on incompatible ';
-       var slice$1 = Array.prototype.slice;
-       var toStr$3 = Object.prototype.toString;
-       var funcType = '[object Function]';
-
-       var implementation$2 = function bind(that) {
-           var target = this;
-           if (typeof target !== 'function' || toStr$3.call(target) !== funcType) {
-               throw new TypeError(ERROR_MESSAGE + target);
-           }
-           var args = slice$1.call(arguments, 1);
-
-           var bound;
-           var binder = function () {
-               if (this instanceof bound) {
-                   var result = target.apply(
-                       this,
-                       args.concat(slice$1.call(arguments))
-                   );
-                   if (Object(result) === result) {
-                       return result;
-                   }
-                   return this;
-               } else {
-                   return target.apply(
-                       that,
-                       args.concat(slice$1.call(arguments))
-                   );
-               }
-           };
-
-           var boundLength = Math.max(0, target.length - args.length);
-           var boundArgs = [];
-           for (var i = 0; i < boundLength; i++) {
-               boundArgs.push('$' + i);
-           }
-
-           bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this,arguments); }')(binder);
-
-           if (target.prototype) {
-               var Empty = function Empty() {};
-               Empty.prototype = target.prototype;
-               bound.prototype = new Empty();
-               Empty.prototype = null;
-           }
+       var DESCRIPTORS$i = descriptors;
+       var definePropertyModule$5 = objectDefineProperty;
+       var anObject$j = anObject$m;
+       var objectKeys$3 = objectKeys$4;

 
 

-           return bound;
+       // `Object.defineProperties` method
+       // https://tc39.es/ecma262/#sec-object.defineproperties
+       // eslint-disable-next-line es/no-object-defineproperties -- safe
+       var objectDefineProperties = DESCRIPTORS$i ? Object.defineProperties : function defineProperties(O, Properties) {
+         anObject$j(O);
+         var keys = objectKeys$3(Properties);
+         var length = keys.length;
+         var index = 0;
+         var key;
+         while (length > index) definePropertyModule$5.f(O, key = keys[index++], Properties[key]);
+         return O;
+       };
+
+       var getBuiltIn$6 = getBuiltIn$9;
+
+       var html$2 = getBuiltIn$6('document', 'documentElement');
+
+       var anObject$i = anObject$m;
+       var defineProperties$2 = objectDefineProperties;
+       var enumBugKeys = enumBugKeys$3;
+       var hiddenKeys$2 = hiddenKeys$6;
+       var html$1 = html$2;
+       var documentCreateElement = documentCreateElement$1;
+       var sharedKey$2 = sharedKey$4;
+
+       var GT = '>';
+       var LT = '<';
+       var PROTOTYPE$2 = 'prototype';
+       var SCRIPT = 'script';
+       var IE_PROTO$1 = sharedKey$2('IE_PROTO');
+
+       var EmptyConstructor = function () { /* empty */ };
+
+       var scriptTag = function (content) {
+         return LT + SCRIPT + GT + content + LT + '/' + SCRIPT + GT;
+       };
+
+       // Create object with fake `null` prototype: use ActiveX Object with cleared prototype
+       var NullProtoObjectViaActiveX = function (activeXDocument) {
+         activeXDocument.write(scriptTag(''));
+         activeXDocument.close();
+         var temp = activeXDocument.parentWindow.Object;
+         activeXDocument = null; // avoid memory leak
+         return temp;
+       };
+
+       // Create object with fake `null` prototype: use iframe Object with cleared prototype
+       var NullProtoObjectViaIFrame = function () {
+         // Thrash, waste and sodomy: IE GC bug
+         var iframe = documentCreateElement('iframe');
+         var JS = 'java' + SCRIPT + ':';
+         var iframeDocument;
+         iframe.style.display = 'none';
+         html$1.appendChild(iframe);
+         // https://github.com/zloirock/core-js/issues/475
+         iframe.src = String(JS);
+         iframeDocument = iframe.contentWindow.document;
+         iframeDocument.open();
+         iframeDocument.write(scriptTag('document.F=Object'));
+         iframeDocument.close();
+         return iframeDocument.F;
+       };
+
+       // Check for document.domain and active x support
+       // No need to use active x approach when document.domain is not set
+       // see https://github.com/es-shims/es5-shim/issues/150
+       // variation of https://github.com/kitcambridge/es5-shim/commit/4f738ac066346
+       // avoid IE GC bug
+       var activeXDocument;
+       var NullProtoObject = function () {
+         try {
+           /* global ActiveXObject -- old IE */
+           activeXDocument = document.domain && new ActiveXObject('htmlfile');
+         } catch (error) { /* ignore */ }
+         NullProtoObject = activeXDocument ? NullProtoObjectViaActiveX(activeXDocument) : NullProtoObjectViaIFrame();
+         var length = enumBugKeys.length;
+         while (length--) delete NullProtoObject[PROTOTYPE$2][enumBugKeys[length]];
+         return NullProtoObject();

        };
 
        };
 

-       var functionBind = Function.prototype.bind || implementation$2;
+       hiddenKeys$2[IE_PROTO$1] = true;

 
 

-       /* globals
-               Atomics,
-               SharedArrayBuffer,
-       */
+       // `Object.create` method
+       // https://tc39.es/ecma262/#sec-object.create
+       var objectCreate = Object.create || function create(O, Properties) {
+         var result;
+         if (O !== null) {
+           EmptyConstructor[PROTOTYPE$2] = anObject$i(O);
+           result = new EmptyConstructor();
+           EmptyConstructor[PROTOTYPE$2] = null;
+           // add "__proto__" for Object.getPrototypeOf polyfill
+           result[IE_PROTO$1] = O;
+         } else result = NullProtoObject();
+         return Properties === undefined ? result : defineProperties$2(result, Properties);
+       };
+
+       var wellKnownSymbol$q = wellKnownSymbol$s;
+       var create$b = objectCreate;
+       var definePropertyModule$4 = objectDefineProperty;
+
+       var UNSCOPABLES = wellKnownSymbol$q('unscopables');
+       var ArrayPrototype$1 = Array.prototype;
+
+       // Array.prototype[@@unscopables]
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       if (ArrayPrototype$1[UNSCOPABLES] == undefined) {
+         definePropertyModule$4.f(ArrayPrototype$1, UNSCOPABLES, {
+           configurable: true,
+           value: create$b(null)
+         });
+       }

 
 

-       var undefined$1;
-
-       var $TypeError = TypeError;
-
-       var $gOPD = Object.getOwnPropertyDescriptor;
-       if ($gOPD) {
-               try {
-                       $gOPD({}, '');
-               } catch (e) {
-                       $gOPD = null; // this is IE 8, which has a broken gOPD
-               }
-       }
-
-       var throwTypeError = function () { throw new $TypeError(); };
-       var ThrowTypeError = $gOPD
-               ? (function () {
-                       try {
-                               // eslint-disable-next-line no-unused-expressions, no-caller, no-restricted-properties
-                               arguments.callee; // IE 8 does not throw here
-                               return throwTypeError;
-                       } catch (calleeThrows) {
-                               try {
-                                       // IE 8 throws on Object.getOwnPropertyDescriptor(arguments, '')
-                                       return $gOPD(arguments, 'callee').get;
-                               } catch (gOPDthrows) {
-                                       return throwTypeError;
-                               }
-                       }
-               }())
-               : throwTypeError;
-
-       var hasSymbols$2 = hasSymbols$1();
-
-       var getProto = Object.getPrototypeOf || function (x) { return x.__proto__; }; // eslint-disable-line no-proto
-       var generatorFunction =  undefined$1;
-       var asyncFunction =  undefined$1;
-       var asyncGenFunction =  undefined$1;
-
-       var TypedArray = typeof Uint8Array === 'undefined' ? undefined$1 : getProto(Uint8Array);
-
-       var INTRINSICS = {
-               '%Array%': Array,
-               '%ArrayBuffer%': typeof ArrayBuffer === 'undefined' ? undefined$1 : ArrayBuffer,
-               '%ArrayBufferPrototype%': typeof ArrayBuffer === 'undefined' ? undefined$1 : ArrayBuffer.prototype,
-               '%ArrayIteratorPrototype%': hasSymbols$2 ? getProto([][Symbol.iterator]()) : undefined$1,
-               '%ArrayPrototype%': Array.prototype,
-               '%ArrayProto_entries%': Array.prototype.entries,
-               '%ArrayProto_forEach%': Array.prototype.forEach,
-               '%ArrayProto_keys%': Array.prototype.keys,
-               '%ArrayProto_values%': Array.prototype.values,
-               '%AsyncFromSyncIteratorPrototype%': undefined$1,
-               '%AsyncFunction%': asyncFunction,
-               '%AsyncFunctionPrototype%':  undefined$1,
-               '%AsyncGenerator%':  undefined$1,
-               '%AsyncGeneratorFunction%': asyncGenFunction,
-               '%AsyncGeneratorPrototype%':  undefined$1,
-               '%AsyncIteratorPrototype%':  undefined$1,
-               '%Atomics%': typeof Atomics === 'undefined' ? undefined$1 : Atomics,
-               '%Boolean%': Boolean,
-               '%BooleanPrototype%': Boolean.prototype,
-               '%DataView%': typeof DataView === 'undefined' ? undefined$1 : DataView,
-               '%DataViewPrototype%': typeof DataView === 'undefined' ? undefined$1 : DataView.prototype,
-               '%Date%': Date,
-               '%DatePrototype%': Date.prototype,
-               '%decodeURI%': decodeURI,
-               '%decodeURIComponent%': decodeURIComponent,
-               '%encodeURI%': encodeURI,
-               '%encodeURIComponent%': encodeURIComponent,
-               '%Error%': Error,
-               '%ErrorPrototype%': Error.prototype,
-               '%eval%': eval, // eslint-disable-line no-eval
-               '%EvalError%': EvalError,
-               '%EvalErrorPrototype%': EvalError.prototype,
-               '%Float32Array%': typeof Float32Array === 'undefined' ? undefined$1 : Float32Array,
-               '%Float32ArrayPrototype%': typeof Float32Array === 'undefined' ? undefined$1 : Float32Array.prototype,
-               '%Float64Array%': typeof Float64Array === 'undefined' ? undefined$1 : Float64Array,
-               '%Float64ArrayPrototype%': typeof Float64Array === 'undefined' ? undefined$1 : Float64Array.prototype,
-               '%Function%': Function,
-               '%FunctionPrototype%': Function.prototype,
-               '%Generator%':  undefined$1,
-               '%GeneratorFunction%': generatorFunction,
-               '%GeneratorPrototype%':  undefined$1,
-               '%Int8Array%': typeof Int8Array === 'undefined' ? undefined$1 : Int8Array,
-               '%Int8ArrayPrototype%': typeof Int8Array === 'undefined' ? undefined$1 : Int8Array.prototype,
-               '%Int16Array%': typeof Int16Array === 'undefined' ? undefined$1 : Int16Array,
-               '%Int16ArrayPrototype%': typeof Int16Array === 'undefined' ? undefined$1 : Int8Array.prototype,
-               '%Int32Array%': typeof Int32Array === 'undefined' ? undefined$1 : Int32Array,
-               '%Int32ArrayPrototype%': typeof Int32Array === 'undefined' ? undefined$1 : Int32Array.prototype,
-               '%isFinite%': isFinite,
-               '%isNaN%': isNaN,
-               '%IteratorPrototype%': hasSymbols$2 ? getProto(getProto([][Symbol.iterator]())) : undefined$1,
-               '%JSON%': typeof JSON === 'object' ? JSON : undefined$1,
-               '%JSONParse%': typeof JSON === 'object' ? JSON.parse : undefined$1,
-               '%Map%': typeof Map === 'undefined' ? undefined$1 : Map,
-               '%MapIteratorPrototype%': typeof Map === 'undefined' || !hasSymbols$2 ? undefined$1 : getProto(new Map()[Symbol.iterator]()),
-               '%MapPrototype%': typeof Map === 'undefined' ? undefined$1 : Map.prototype,
-               '%Math%': Math,
-               '%Number%': Number,
-               '%NumberPrototype%': Number.prototype,
-               '%Object%': Object,
-               '%ObjectPrototype%': Object.prototype,
-               '%ObjProto_toString%': Object.prototype.toString,
-               '%ObjProto_valueOf%': Object.prototype.valueOf,
-               '%parseFloat%': parseFloat,
-               '%parseInt%': parseInt,
-               '%Promise%': typeof Promise === 'undefined' ? undefined$1 : Promise,
-               '%PromisePrototype%': typeof Promise === 'undefined' ? undefined$1 : Promise.prototype,
-               '%PromiseProto_then%': typeof Promise === 'undefined' ? undefined$1 : Promise.prototype.then,
-               '%Promise_all%': typeof Promise === 'undefined' ? undefined$1 : Promise.all,
-               '%Promise_reject%': typeof Promise === 'undefined' ? undefined$1 : Promise.reject,
-               '%Promise_resolve%': typeof Promise === 'undefined' ? undefined$1 : Promise.resolve,
-               '%Proxy%': typeof Proxy === 'undefined' ? undefined$1 : Proxy,
-               '%RangeError%': RangeError,
-               '%RangeErrorPrototype%': RangeError.prototype,
-               '%ReferenceError%': ReferenceError,
-               '%ReferenceErrorPrototype%': ReferenceError.prototype,
-               '%Reflect%': typeof Reflect === 'undefined' ? undefined$1 : Reflect,
-               '%RegExp%': RegExp,
-               '%RegExpPrototype%': RegExp.prototype,
-               '%Set%': typeof Set === 'undefined' ? undefined$1 : Set,
-               '%SetIteratorPrototype%': typeof Set === 'undefined' || !hasSymbols$2 ? undefined$1 : getProto(new Set()[Symbol.iterator]()),
-               '%SetPrototype%': typeof Set === 'undefined' ? undefined$1 : Set.prototype,
-               '%SharedArrayBuffer%': typeof SharedArrayBuffer === 'undefined' ? undefined$1 : SharedArrayBuffer,
-               '%SharedArrayBufferPrototype%': typeof SharedArrayBuffer === 'undefined' ? undefined$1 : SharedArrayBuffer.prototype,
-               '%String%': String,
-               '%StringIteratorPrototype%': hasSymbols$2 ? getProto(''[Symbol.iterator]()) : undefined$1,
-               '%StringPrototype%': String.prototype,
-               '%Symbol%': hasSymbols$2 ? Symbol : undefined$1,
-               '%SymbolPrototype%': hasSymbols$2 ? Symbol.prototype : undefined$1,
-               '%SyntaxError%': SyntaxError,
-               '%SyntaxErrorPrototype%': SyntaxError.prototype,
-               '%ThrowTypeError%': ThrowTypeError,
-               '%TypedArray%': TypedArray,
-               '%TypedArrayPrototype%': TypedArray ? TypedArray.prototype : undefined$1,
-               '%TypeError%': $TypeError,
-               '%TypeErrorPrototype%': $TypeError.prototype,
-               '%Uint8Array%': typeof Uint8Array === 'undefined' ? undefined$1 : Uint8Array,
-               '%Uint8ArrayPrototype%': typeof Uint8Array === 'undefined' ? undefined$1 : Uint8Array.prototype,
-               '%Uint8ClampedArray%': typeof Uint8ClampedArray === 'undefined' ? undefined$1 : Uint8ClampedArray,
-               '%Uint8ClampedArrayPrototype%': typeof Uint8ClampedArray === 'undefined' ? undefined$1 : Uint8ClampedArray.prototype,
-               '%Uint16Array%': typeof Uint16Array === 'undefined' ? undefined$1 : Uint16Array,
-               '%Uint16ArrayPrototype%': typeof Uint16Array === 'undefined' ? undefined$1 : Uint16Array.prototype,
-               '%Uint32Array%': typeof Uint32Array === 'undefined' ? undefined$1 : Uint32Array,
-               '%Uint32ArrayPrototype%': typeof Uint32Array === 'undefined' ? undefined$1 : Uint32Array.prototype,
-               '%URIError%': URIError,
-               '%URIErrorPrototype%': URIError.prototype,
-               '%WeakMap%': typeof WeakMap === 'undefined' ? undefined$1 : WeakMap,
-               '%WeakMapPrototype%': typeof WeakMap === 'undefined' ? undefined$1 : WeakMap.prototype,
-               '%WeakSet%': typeof WeakSet === 'undefined' ? undefined$1 : WeakSet,
-               '%WeakSetPrototype%': typeof WeakSet === 'undefined' ? undefined$1 : WeakSet.prototype
+       // add a key to Array.prototype[@@unscopables]
+       var addToUnscopables$5 = function (key) {
+         ArrayPrototype$1[UNSCOPABLES][key] = true;

        };
 
        };
 

+       var iterators = {};

 
 

-       var $replace = functionBind.call(Function.call, String.prototype.replace);
+       var fails$H = fails$N;

 
 

-       /* adapted from https://github.com/lodash/lodash/blob/4.17.15/dist/lodash.js#L6735-L6744 */
-       var rePropName = /[^%.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|%$))/g;
-       var reEscapeChar = /\\(\\)?/g; /** Used to match backslashes in property paths. */
-       var stringToPath = function stringToPath(string) {
-               var result = [];
-               $replace(string, rePropName, function (match, number, quote, subString) {
-                       result[result.length] = quote ? $replace(subString, reEscapeChar, '$1') : (number || match);
-               });
-               return result;
-       };
-       /* end adaptation */
+       var correctPrototypeGetter = !fails$H(function () {
+         function F() { /* empty */ }
+         F.prototype.constructor = null;
+         // eslint-disable-next-line es/no-object-getprototypeof -- required for testing
+         return Object.getPrototypeOf(new F()) !== F.prototype;
+       });
+
+       var has$b = has$j;
+       var toObject$g = toObject$i;
+       var sharedKey$1 = sharedKey$4;
+       var CORRECT_PROTOTYPE_GETTER$1 = correctPrototypeGetter;
+
+       var IE_PROTO = sharedKey$1('IE_PROTO');
+       var ObjectPrototype$3 = Object.prototype;
+
+       // `Object.getPrototypeOf` method
+       // https://tc39.es/ecma262/#sec-object.getprototypeof
+       // eslint-disable-next-line es/no-object-getprototypeof -- safe
+       var objectGetPrototypeOf = CORRECT_PROTOTYPE_GETTER$1 ? Object.getPrototypeOf : function (O) {
+         O = toObject$g(O);
+         if (has$b(O, IE_PROTO)) return O[IE_PROTO];
+         if (typeof O.constructor == 'function' && O instanceof O.constructor) {
+           return O.constructor.prototype;
+         } return O instanceof Object ? ObjectPrototype$3 : null;
+       };
+
+       var fails$G = fails$N;
+       var getPrototypeOf$4 = objectGetPrototypeOf;
+       var createNonEnumerableProperty$9 = createNonEnumerableProperty$e;
+       var has$a = has$j;
+       var wellKnownSymbol$p = wellKnownSymbol$s;
+
+       var ITERATOR$8 = wellKnownSymbol$p('iterator');
+       var BUGGY_SAFARI_ITERATORS$1 = false;
+
+       var returnThis$2 = function () { return this; };
+
+       // `%IteratorPrototype%` object
+       // https://tc39.es/ecma262/#sec-%iteratorprototype%-object
+       var IteratorPrototype$2, PrototypeOfArrayIteratorPrototype, arrayIterator;
+
+       /* eslint-disable es/no-array-prototype-keys -- safe */
+       if ([].keys) {
+         arrayIterator = [].keys();
+         // Safari 8 has buggy iterators w/o `next`
+         if (!('next' in arrayIterator)) BUGGY_SAFARI_ITERATORS$1 = true;
+         else {
+           PrototypeOfArrayIteratorPrototype = getPrototypeOf$4(getPrototypeOf$4(arrayIterator));
+           if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype$2 = PrototypeOfArrayIteratorPrototype;
+         }
+       }

 
 

-       var getBaseIntrinsic = function getBaseIntrinsic(name, allowMissing) {
-               if (!(name in INTRINSICS)) {
-                       throw new SyntaxError('intrinsic ' + name + ' does not exist!');
-               }
+       var NEW_ITERATOR_PROTOTYPE = IteratorPrototype$2 == undefined || fails$G(function () {
+         var test = {};
+         // FF44- legacy iterators case
+         return IteratorPrototype$2[ITERATOR$8].call(test) !== test;
+       });

 
 

-               // istanbul ignore if // hopefully this is impossible to test :-)
-               if (typeof INTRINSICS[name] === 'undefined' && !allowMissing) {
-                       throw new $TypeError('intrinsic ' + name + ' exists, but is not available. Please file an issue!');
-               }
+       if (NEW_ITERATOR_PROTOTYPE) IteratorPrototype$2 = {};

 
 

-               return INTRINSICS[name];
-       };
+       // `%IteratorPrototype%[@@iterator]()` method
+       // https://tc39.es/ecma262/#sec-%iteratorprototype%-@@iterator
+       if (!has$a(IteratorPrototype$2, ITERATOR$8)) {
+         createNonEnumerableProperty$9(IteratorPrototype$2, ITERATOR$8, returnThis$2);
+       }

 
 

-       var GetIntrinsic = function GetIntrinsic(name, allowMissing) {
-               if (typeof name !== 'string' || name.length === 0) {
-                       throw new TypeError('intrinsic name must be a non-empty string');
-               }
-               if (arguments.length > 1 && typeof allowMissing !== 'boolean') {
-                       throw new TypeError('"allowMissing" argument must be a boolean');
-               }
-
-               var parts = stringToPath(name);
-
-               var value = getBaseIntrinsic('%' + (parts.length > 0 ? parts[0] : '') + '%', allowMissing);
-               for (var i = 1; i < parts.length; i += 1) {
-                       if (value != null) {
-                               if ($gOPD && (i + 1) >= parts.length) {
-                                       var desc = $gOPD(value, parts[i]);
-                                       if (!allowMissing && !(parts[i] in value)) {
-                                               throw new $TypeError('base intrinsic for ' + name + ' exists, but the property is not available.');
-                                       }
-                                       value = desc ? (desc.get || desc.value) : value[parts[i]];
-                               } else {
-                                       value = value[parts[i]];
-                               }
-                       }
-               }
-               return value;
+       var iteratorsCore = {
+         IteratorPrototype: IteratorPrototype$2,
+         BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS$1

        };
 
        };
 

-       var $TypeError$1 = GetIntrinsic('%TypeError%');
+       var defineProperty$9 = objectDefineProperty.f;
+       var has$9 = has$j;
+       var wellKnownSymbol$o = wellKnownSymbol$s;

 
 

-       // http://www.ecma-international.org/ecma-262/5.1/#sec-9.10
+       var TO_STRING_TAG$4 = wellKnownSymbol$o('toStringTag');

 
 

-       var CheckObjectCoercible = function CheckObjectCoercible(value, optMessage) {
-               if (value == null) {
-                       throw new $TypeError$1(optMessage || ('Cannot call method on ' + value));
-               }
-               return value;
+       var setToStringTag$a = function (it, TAG, STATIC) {
+         if (it && !has$9(it = STATIC ? it : it.prototype, TO_STRING_TAG$4)) {
+           defineProperty$9(it, TO_STRING_TAG$4, { configurable: true, value: TAG });
+         }

        };
 
        };
 

-       var RequireObjectCoercible = CheckObjectCoercible;
-
-       var $Object = GetIntrinsic('%Object%');
+       var IteratorPrototype$1 = iteratorsCore.IteratorPrototype;
+       var create$a = objectCreate;
+       var createPropertyDescriptor$4 = createPropertyDescriptor$7;
+       var setToStringTag$9 = setToStringTag$a;
+       var Iterators$4 = iterators;

 
 

+       var returnThis$1 = function () { return this; };

 
 

+       var createIteratorConstructor$2 = function (IteratorConstructor, NAME, next) {
+         var TO_STRING_TAG = NAME + ' Iterator';
+         IteratorConstructor.prototype = create$a(IteratorPrototype$1, { next: createPropertyDescriptor$4(1, next) });
+         setToStringTag$9(IteratorConstructor, TO_STRING_TAG, false);
+         Iterators$4[TO_STRING_TAG] = returnThis$1;
+         return IteratorConstructor;
+       };

 
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-toobject
+       var isObject$m = isObject$r;

 
 

-       var ToObject = function ToObject(value) {
-               RequireObjectCoercible(value);
-               return $Object(value);
+       var aPossiblePrototype$1 = function (it) {
+         if (!isObject$m(it) && it !== null) {
+           throw TypeError("Can't set " + String(it) + ' as a prototype');
+         } return it;

        };
 
        };
 

-       var $Math = GetIntrinsic('%Math%');
-       var $Number = GetIntrinsic('%Number%');
-
-       var maxSafeInteger = $Number.MAX_SAFE_INTEGER || $Math.pow(2, 53) - 1;
+       /* eslint-disable no-proto -- safe */

 
 

-       // http://www.ecma-international.org/ecma-262/5.1/#sec-9.3
+       var anObject$h = anObject$m;
+       var aPossiblePrototype = aPossiblePrototype$1;

 
 

-       var ToNumber = function ToNumber(value) {
-               return +value; // eslint-disable-line no-implicit-coercion
-       };
+       // `Object.setPrototypeOf` method
+       // https://tc39.es/ecma262/#sec-object.setprototypeof
+       // Works with __proto__ only. Old v8 can't work with null proto objects.
+       // eslint-disable-next-line es/no-object-setprototypeof -- safe
+       var objectSetPrototypeOf = Object.setPrototypeOf || ('__proto__' in {} ? function () {
+         var CORRECT_SETTER = false;
+         var test = {};
+         var setter;
+         try {
+           // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+           setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;
+           setter.call(test, []);
+           CORRECT_SETTER = test instanceof Array;
+         } catch (error) { /* empty */ }
+         return function setPrototypeOf(O, proto) {
+           anObject$h(O);
+           aPossiblePrototype(proto);
+           if (CORRECT_SETTER) setter.call(O, proto);
+           else O.__proto__ = proto;
+           return O;
+         };
+       }() : undefined);
+
+       var $$15 = _export;
+       var createIteratorConstructor$1 = createIteratorConstructor$2;
+       var getPrototypeOf$3 = objectGetPrototypeOf;
+       var setPrototypeOf$6 = objectSetPrototypeOf;
+       var setToStringTag$8 = setToStringTag$a;
+       var createNonEnumerableProperty$8 = createNonEnumerableProperty$e;
+       var redefine$d = redefine$g.exports;
+       var wellKnownSymbol$n = wellKnownSymbol$s;
+       var Iterators$3 = iterators;
+       var IteratorsCore = iteratorsCore;
+
+       var IteratorPrototype = IteratorsCore.IteratorPrototype;
+       var BUGGY_SAFARI_ITERATORS = IteratorsCore.BUGGY_SAFARI_ITERATORS;
+       var ITERATOR$7 = wellKnownSymbol$n('iterator');
+       var KEYS = 'keys';
+       var VALUES = 'values';
+       var ENTRIES = 'entries';
+
+       var returnThis = function () { return this; };
+
+       var defineIterator$3 = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {
+         createIteratorConstructor$1(IteratorConstructor, NAME, next);
+
+         var getIterationMethod = function (KIND) {
+           if (KIND === DEFAULT && defaultIterator) return defaultIterator;
+           if (!BUGGY_SAFARI_ITERATORS && KIND in IterablePrototype) return IterablePrototype[KIND];
+           switch (KIND) {
+             case KEYS: return function keys() { return new IteratorConstructor(this, KIND); };
+             case VALUES: return function values() { return new IteratorConstructor(this, KIND); };
+             case ENTRIES: return function entries() { return new IteratorConstructor(this, KIND); };
+           } return function () { return new IteratorConstructor(this); };
+         };
+
+         var TO_STRING_TAG = NAME + ' Iterator';
+         var INCORRECT_VALUES_NAME = false;
+         var IterablePrototype = Iterable.prototype;
+         var nativeIterator = IterablePrototype[ITERATOR$7]
+           || IterablePrototype['@@iterator']
+           || DEFAULT && IterablePrototype[DEFAULT];
+         var defaultIterator = !BUGGY_SAFARI_ITERATORS && nativeIterator || getIterationMethod(DEFAULT);
+         var anyNativeIterator = NAME == 'Array' ? IterablePrototype.entries || nativeIterator : nativeIterator;
+         var CurrentIteratorPrototype, methods, KEY;
+
+         // fix native
+         if (anyNativeIterator) {
+           CurrentIteratorPrototype = getPrototypeOf$3(anyNativeIterator.call(new Iterable()));
+           if (IteratorPrototype !== Object.prototype && CurrentIteratorPrototype.next) {
+             if (getPrototypeOf$3(CurrentIteratorPrototype) !== IteratorPrototype) {
+               if (setPrototypeOf$6) {
+                 setPrototypeOf$6(CurrentIteratorPrototype, IteratorPrototype);
+               } else if (typeof CurrentIteratorPrototype[ITERATOR$7] != 'function') {
+                 createNonEnumerableProperty$8(CurrentIteratorPrototype, ITERATOR$7, returnThis);
+               }
+             }
+             // Set @@toStringTag to native iterators
+             setToStringTag$8(CurrentIteratorPrototype, TO_STRING_TAG, true);
+           }
+         }

 
 

-       var _isNaN = Number.isNaN || function isNaN(a) {
-               return a !== a;
-       };
+         // fix Array.prototype.{ values, @@iterator }.name in V8 / FF
+         if (DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {
+           INCORRECT_VALUES_NAME = true;
+           defaultIterator = function values() { return nativeIterator.call(this); };
+         }

 
 

-       var $isNaN = Number.isNaN || function (a) { return a !== a; };
+         // define iterator
+         if (IterablePrototype[ITERATOR$7] !== defaultIterator) {
+           createNonEnumerableProperty$8(IterablePrototype, ITERATOR$7, defaultIterator);
+         }
+         Iterators$3[NAME] = defaultIterator;

 
 

-       var _isFinite = Number.isFinite || function (x) { return typeof x === 'number' && !$isNaN(x) && x !== Infinity && x !== -Infinity; };
+         // export additional methods
+         if (DEFAULT) {
+           methods = {
+             values: getIterationMethod(VALUES),
+             keys: IS_SET ? defaultIterator : getIterationMethod(KEYS),
+             entries: getIterationMethod(ENTRIES)
+           };
+           if (FORCED) for (KEY in methods) {
+             if (BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {
+               redefine$d(IterablePrototype, KEY, methods[KEY]);
+             }
+           } else $$15({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME }, methods);
+         }
+
+         return methods;
+       };
+
+       var toIndexedObject$7 = toIndexedObject$b;
+       var addToUnscopables$4 = addToUnscopables$5;
+       var Iterators$2 = iterators;
+       var InternalStateModule$8 = internalState;
+       var defineIterator$2 = defineIterator$3;
+
+       var ARRAY_ITERATOR = 'Array Iterator';
+       var setInternalState$8 = InternalStateModule$8.set;
+       var getInternalState$6 = InternalStateModule$8.getterFor(ARRAY_ITERATOR);
+
+       // `Array.prototype.entries` method
+       // https://tc39.es/ecma262/#sec-array.prototype.entries
+       // `Array.prototype.keys` method
+       // https://tc39.es/ecma262/#sec-array.prototype.keys
+       // `Array.prototype.values` method
+       // https://tc39.es/ecma262/#sec-array.prototype.values
+       // `Array.prototype[@@iterator]` method
+       // https://tc39.es/ecma262/#sec-array.prototype-@@iterator
+       // `CreateArrayIterator` internal method
+       // https://tc39.es/ecma262/#sec-createarrayiterator
+       var es_array_iterator = defineIterator$2(Array, 'Array', function (iterated, kind) {
+         setInternalState$8(this, {
+           type: ARRAY_ITERATOR,
+           target: toIndexedObject$7(iterated), // target
+           index: 0,                          // next index
+           kind: kind                         // kind
+         });
+       // `%ArrayIteratorPrototype%.next` method
+       // https://tc39.es/ecma262/#sec-%arrayiteratorprototype%.next
+       }, function () {
+         var state = getInternalState$6(this);
+         var target = state.target;
+         var kind = state.kind;
+         var index = state.index++;
+         if (!target || index >= target.length) {
+           state.target = undefined;
+           return { value: undefined, done: true };
+         }
+         if (kind == 'keys') return { value: index, done: false };
+         if (kind == 'values') return { value: target[index], done: false };
+         return { value: [index, target[index]], done: false };
+       }, 'values');
+
+       // argumentsList[@@iterator] is %ArrayProto_values%
+       // https://tc39.es/ecma262/#sec-createunmappedargumentsobject
+       // https://tc39.es/ecma262/#sec-createmappedargumentsobject
+       Iterators$2.Arguments = Iterators$2.Array;
+
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables$4('keys');
+       addToUnscopables$4('values');
+       addToUnscopables$4('entries');
+
+       var wellKnownSymbol$m = wellKnownSymbol$s;
+
+       var TO_STRING_TAG$3 = wellKnownSymbol$m('toStringTag');
+       var test$2 = {};
+
+       test$2[TO_STRING_TAG$3] = 'z';
+
+       var toStringTagSupport = String(test$2) === '[object z]';
+
+       var TO_STRING_TAG_SUPPORT$2 = toStringTagSupport;
+       var classofRaw = classofRaw$1;
+       var wellKnownSymbol$l = wellKnownSymbol$s;
+
+       var TO_STRING_TAG$2 = wellKnownSymbol$l('toStringTag');
+       // ES3 wrong here
+       var CORRECT_ARGUMENTS = classofRaw(function () { return arguments; }()) == 'Arguments';
+
+       // fallback for IE11 Script Access Denied error
+       var tryGet = function (it, key) {
+         try {
+           return it[key];
+         } catch (error) { /* empty */ }
+       };
+
+       // getting tag from ES6+ `Object.prototype.toString`
+       var classof$b = TO_STRING_TAG_SUPPORT$2 ? classofRaw : function (it) {
+         var O, tag, result;
+         return it === undefined ? 'Undefined' : it === null ? 'Null'
+           // @@toStringTag case
+           : typeof (tag = tryGet(O = Object(it), TO_STRING_TAG$2)) == 'string' ? tag
+           // builtinTag case
+           : CORRECT_ARGUMENTS ? classofRaw(O)
+           // ES3 arguments fallback
+           : (result = classofRaw(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : result;
+       };
+
+       var TO_STRING_TAG_SUPPORT$1 = toStringTagSupport;
+       var classof$a = classof$b;
+
+       // `Object.prototype.toString` method implementation
+       // https://tc39.es/ecma262/#sec-object.prototype.tostring
+       var objectToString$1 = TO_STRING_TAG_SUPPORT$1 ? {}.toString : function toString() {
+         return '[object ' + classof$a(this) + ']';
+       };
+
+       var TO_STRING_TAG_SUPPORT = toStringTagSupport;
+       var redefine$c = redefine$g.exports;
+       var toString$1 = objectToString$1;
+
+       // `Object.prototype.toString` method
+       // https://tc39.es/ecma262/#sec-object.prototype.tostring
+       if (!TO_STRING_TAG_SUPPORT) {
+         redefine$c(Object.prototype, 'toString', toString$1, { unsafe: true });
+       }
+
+       var toInteger$8 = toInteger$b;
+       var requireObjectCoercible$b = requireObjectCoercible$e;
+
+       // `String.prototype.{ codePointAt, at }` methods implementation
+       var createMethod$5 = function (CONVERT_TO_STRING) {
+         return function ($this, pos) {
+           var S = String(requireObjectCoercible$b($this));
+           var position = toInteger$8(pos);
+           var size = S.length;
+           var first, second;
+           if (position < 0 || position >= size) return CONVERT_TO_STRING ? '' : undefined;
+           first = S.charCodeAt(position);
+           return first < 0xD800 || first > 0xDBFF || position + 1 === size
+             || (second = S.charCodeAt(position + 1)) < 0xDC00 || second > 0xDFFF
+               ? CONVERT_TO_STRING ? S.charAt(position) : first
+               : CONVERT_TO_STRING ? S.slice(position, position + 2) : (first - 0xD800 << 10) + (second - 0xDC00) + 0x10000;
+         };
+       };
+
+       var stringMultibyte = {
+         // `String.prototype.codePointAt` method
+         // https://tc39.es/ecma262/#sec-string.prototype.codepointat
+         codeAt: createMethod$5(false),
+         // `String.prototype.at` method
+         // https://github.com/mathiasbynens/String.prototype.at
+         charAt: createMethod$5(true)
+       };
+
+       var charAt$1 = stringMultibyte.charAt;
+       var InternalStateModule$7 = internalState;
+       var defineIterator$1 = defineIterator$3;
+
+       var STRING_ITERATOR = 'String Iterator';
+       var setInternalState$7 = InternalStateModule$7.set;
+       var getInternalState$5 = InternalStateModule$7.getterFor(STRING_ITERATOR);
+
+       // `String.prototype[@@iterator]` method
+       // https://tc39.es/ecma262/#sec-string.prototype-@@iterator
+       defineIterator$1(String, 'String', function (iterated) {
+         setInternalState$7(this, {
+           type: STRING_ITERATOR,
+           string: String(iterated),
+           index: 0
+         });
+       // `%StringIteratorPrototype%.next` method
+       // https://tc39.es/ecma262/#sec-%stringiteratorprototype%.next
+       }, function next() {
+         var state = getInternalState$5(this);
+         var string = state.string;
+         var index = state.index;
+         var point;
+         if (index >= string.length) return { value: undefined, done: true };
+         point = charAt$1(string, index);
+         state.index += point.length;
+         return { value: point, done: false };
+       });

 
 

-       var sign$1 = function sign(number) {
-               return number >= 0 ? 1 : -1;
-       };
+       // iterable DOM collections
+       // flag - `iterable` interface - 'entries', 'keys', 'values', 'forEach' methods
+       var domIterables = {
+         CSSRuleList: 0,
+         CSSStyleDeclaration: 0,
+         CSSValueList: 0,
+         ClientRectList: 0,
+         DOMRectList: 0,
+         DOMStringList: 0,
+         DOMTokenList: 1,
+         DataTransferItemList: 0,
+         FileList: 0,
+         HTMLAllCollection: 0,
+         HTMLCollection: 0,
+         HTMLFormElement: 0,
+         HTMLSelectElement: 0,
+         MediaList: 0,
+         MimeTypeArray: 0,
+         NamedNodeMap: 0,
+         NodeList: 1,
+         PaintRequestList: 0,
+         Plugin: 0,
+         PluginArray: 0,
+         SVGLengthList: 0,
+         SVGNumberList: 0,
+         SVGPathSegList: 0,
+         SVGPointList: 0,
+         SVGStringList: 0,
+         SVGTransformList: 0,
+         SourceBufferList: 0,
+         StyleSheetList: 0,
+         TextTrackCueList: 0,
+         TextTrackList: 0,
+         TouchList: 0
+       };
+
+       var global$t = global$F;
+       var DOMIterables$1 = domIterables;
+       var ArrayIteratorMethods = es_array_iterator;
+       var createNonEnumerableProperty$7 = createNonEnumerableProperty$e;
+       var wellKnownSymbol$k = wellKnownSymbol$s;
+
+       var ITERATOR$6 = wellKnownSymbol$k('iterator');
+       var TO_STRING_TAG$1 = wellKnownSymbol$k('toStringTag');
+       var ArrayValues = ArrayIteratorMethods.values;
+
+       for (var COLLECTION_NAME$1 in DOMIterables$1) {
+         var Collection$1 = global$t[COLLECTION_NAME$1];
+         var CollectionPrototype$1 = Collection$1 && Collection$1.prototype;
+         if (CollectionPrototype$1) {
+           // some Chrome versions have non-configurable methods on DOMTokenList
+           if (CollectionPrototype$1[ITERATOR$6] !== ArrayValues) try {
+             createNonEnumerableProperty$7(CollectionPrototype$1, ITERATOR$6, ArrayValues);
+           } catch (error) {
+             CollectionPrototype$1[ITERATOR$6] = ArrayValues;
+           }
+           if (!CollectionPrototype$1[TO_STRING_TAG$1]) {
+             createNonEnumerableProperty$7(CollectionPrototype$1, TO_STRING_TAG$1, COLLECTION_NAME$1);
+           }
+           if (DOMIterables$1[COLLECTION_NAME$1]) for (var METHOD_NAME in ArrayIteratorMethods) {
+             // some Chrome versions have non-configurable methods on DOMTokenList
+             if (CollectionPrototype$1[METHOD_NAME] !== ArrayIteratorMethods[METHOD_NAME]) try {
+               createNonEnumerableProperty$7(CollectionPrototype$1, METHOD_NAME, ArrayIteratorMethods[METHOD_NAME]);
+             } catch (error) {
+               CollectionPrototype$1[METHOD_NAME] = ArrayIteratorMethods[METHOD_NAME];
+             }
+           }
+         }
+       }

 
 

-       var $Math$1 = GetIntrinsic('%Math%');
+       var classof$9 = classofRaw$1;

 
 

+       // `IsArray` abstract operation
+       // https://tc39.es/ecma262/#sec-isarray
+       // eslint-disable-next-line es/no-array-isarray -- safe
+       var isArray$6 = Array.isArray || function isArray(arg) {
+         return classof$9(arg) == 'Array';
+       };

 
 

+       var objectGetOwnPropertyNamesExternal = {};

 
 

+       /* eslint-disable es/no-object-getownpropertynames -- safe */

 
 

+       var toIndexedObject$6 = toIndexedObject$b;
+       var $getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;

 
 

+       var toString = {}.toString;

 
 

-       var $floor = $Math$1.floor;
-       var $abs = $Math$1.abs;
+       var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames
+         ? Object.getOwnPropertyNames(window) : [];

 
 

-       // http://www.ecma-international.org/ecma-262/5.1/#sec-9.4
+       var getWindowNames = function (it) {
+         try {
+           return $getOwnPropertyNames$1(it);
+         } catch (error) {
+           return windowNames.slice();
+         }
+       };
+
+       // fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
+       objectGetOwnPropertyNamesExternal.f = function getOwnPropertyNames(it) {
+         return windowNames && toString.call(it) == '[object Window]'
+           ? getWindowNames(it)
+           : $getOwnPropertyNames$1(toIndexedObject$6(it));
+       };
+
+       var aFunction$9 = function (it) {
+         if (typeof it != 'function') {
+           throw TypeError(String(it) + ' is not a function');
+         } return it;
+       };
+
+       var aFunction$8 = aFunction$9;
+
+       // optional / simple context binding
+       var functionBindContext = function (fn, that, length) {
+         aFunction$8(fn);
+         if (that === undefined) return fn;
+         switch (length) {
+           case 0: return function () {
+             return fn.call(that);
+           };
+           case 1: return function (a) {
+             return fn.call(that, a);
+           };
+           case 2: return function (a, b) {
+             return fn.call(that, a, b);
+           };
+           case 3: return function (a, b, c) {
+             return fn.call(that, a, b, c);
+           };
+         }
+         return function (/* ...args */) {
+           return fn.apply(that, arguments);
+         };
+       };
+
+       var isObject$l = isObject$r;
+       var isArray$5 = isArray$6;
+       var wellKnownSymbol$j = wellKnownSymbol$s;
+
+       var SPECIES$6 = wellKnownSymbol$j('species');
+
+       // `ArraySpeciesCreate` abstract operation
+       // https://tc39.es/ecma262/#sec-arrayspeciescreate
+       var arraySpeciesCreate$3 = function (originalArray, length) {
+         var C;
+         if (isArray$5(originalArray)) {
+           C = originalArray.constructor;
+           // cross-realm fallback
+           if (typeof C == 'function' && (C === Array || isArray$5(C.prototype))) C = undefined;
+           else if (isObject$l(C)) {
+             C = C[SPECIES$6];
+             if (C === null) C = undefined;
+           }
+         } return new (C === undefined ? Array : C)(length === 0 ? 0 : length);
+       };
+
+       var bind$b = functionBindContext;
+       var IndexedObject$3 = indexedObject;
+       var toObject$f = toObject$i;
+       var toLength$o = toLength$q;
+       var arraySpeciesCreate$2 = arraySpeciesCreate$3;
+
+       var push = [].push;
+
+       // `Array.prototype.{ forEach, map, filter, some, every, find, findIndex, filterOut }` methods implementation
+       var createMethod$4 = function (TYPE) {
+         var IS_MAP = TYPE == 1;
+         var IS_FILTER = TYPE == 2;
+         var IS_SOME = TYPE == 3;
+         var IS_EVERY = TYPE == 4;
+         var IS_FIND_INDEX = TYPE == 6;
+         var IS_FILTER_OUT = TYPE == 7;
+         var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
+         return function ($this, callbackfn, that, specificCreate) {
+           var O = toObject$f($this);
+           var self = IndexedObject$3(O);
+           var boundFunction = bind$b(callbackfn, that, 3);
+           var length = toLength$o(self.length);
+           var index = 0;
+           var create = specificCreate || arraySpeciesCreate$2;
+           var target = IS_MAP ? create($this, length) : IS_FILTER || IS_FILTER_OUT ? create($this, 0) : undefined;
+           var value, result;
+           for (;length > index; index++) if (NO_HOLES || index in self) {
+             value = self[index];
+             result = boundFunction(value, index, O);
+             if (TYPE) {
+               if (IS_MAP) target[index] = result; // map
+               else if (result) switch (TYPE) {
+                 case 3: return true;              // some
+                 case 5: return value;             // find
+                 case 6: return index;             // findIndex
+                 case 2: push.call(target, value); // filter
+               } else switch (TYPE) {
+                 case 4: return false;             // every
+                 case 7: push.call(target, value); // filterOut
+               }
+             }
+           }
+           return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;
+         };
+       };
+
+       var arrayIteration = {
+         // `Array.prototype.forEach` method
+         // https://tc39.es/ecma262/#sec-array.prototype.foreach
+         forEach: createMethod$4(0),
+         // `Array.prototype.map` method
+         // https://tc39.es/ecma262/#sec-array.prototype.map
+         map: createMethod$4(1),
+         // `Array.prototype.filter` method
+         // https://tc39.es/ecma262/#sec-array.prototype.filter
+         filter: createMethod$4(2),
+         // `Array.prototype.some` method
+         // https://tc39.es/ecma262/#sec-array.prototype.some
+         some: createMethod$4(3),
+         // `Array.prototype.every` method
+         // https://tc39.es/ecma262/#sec-array.prototype.every
+         every: createMethod$4(4),
+         // `Array.prototype.find` method
+         // https://tc39.es/ecma262/#sec-array.prototype.find
+         find: createMethod$4(5),
+         // `Array.prototype.findIndex` method
+         // https://tc39.es/ecma262/#sec-array.prototype.findIndex
+         findIndex: createMethod$4(6),
+         // `Array.prototype.filterOut` method
+         // https://github.com/tc39/proposal-array-filtering
+         filterOut: createMethod$4(7)
+       };
+
+       var $$14 = _export;
+       var global$s = global$F;
+       var getBuiltIn$5 = getBuiltIn$9;
+       var DESCRIPTORS$h = descriptors;
+       var NATIVE_SYMBOL = nativeSymbol;
+       var USE_SYMBOL_AS_UID = useSymbolAsUid;
+       var fails$F = fails$N;
+       var has$8 = has$j;
+       var isArray$4 = isArray$6;
+       var isObject$k = isObject$r;
+       var anObject$g = anObject$m;
+       var toObject$e = toObject$i;
+       var toIndexedObject$5 = toIndexedObject$b;
+       var toPrimitive$4 = toPrimitive$7;
+       var createPropertyDescriptor$3 = createPropertyDescriptor$7;
+       var nativeObjectCreate = objectCreate;
+       var objectKeys$2 = objectKeys$4;
+       var getOwnPropertyNamesModule = objectGetOwnPropertyNames;
+       var getOwnPropertyNamesExternal = objectGetOwnPropertyNamesExternal;
+       var getOwnPropertySymbolsModule$1 = objectGetOwnPropertySymbols;
+       var getOwnPropertyDescriptorModule$2 = objectGetOwnPropertyDescriptor;
+       var definePropertyModule$3 = objectDefineProperty;
+       var propertyIsEnumerableModule$1 = objectPropertyIsEnumerable;
+       var createNonEnumerableProperty$6 = createNonEnumerableProperty$e;
+       var redefine$b = redefine$g.exports;
+       var shared$1 = shared$5.exports;
+       var sharedKey = sharedKey$4;
+       var hiddenKeys$1 = hiddenKeys$6;
+       var uid$2 = uid$5;
+       var wellKnownSymbol$i = wellKnownSymbol$s;
+       var wrappedWellKnownSymbolModule = wellKnownSymbolWrapped;
+       var defineWellKnownSymbol$2 = defineWellKnownSymbol$4;
+       var setToStringTag$7 = setToStringTag$a;
+       var InternalStateModule$6 = internalState;
+       var $forEach$2 = arrayIteration.forEach;
+
+       var HIDDEN = sharedKey('hidden');
+       var SYMBOL = 'Symbol';
+       var PROTOTYPE$1 = 'prototype';
+       var TO_PRIMITIVE = wellKnownSymbol$i('toPrimitive');
+       var setInternalState$6 = InternalStateModule$6.set;
+       var getInternalState$4 = InternalStateModule$6.getterFor(SYMBOL);
+       var ObjectPrototype$2 = Object[PROTOTYPE$1];
+       var $Symbol = global$s.Symbol;
+       var $stringify = getBuiltIn$5('JSON', 'stringify');
+       var nativeGetOwnPropertyDescriptor$2 = getOwnPropertyDescriptorModule$2.f;
+       var nativeDefineProperty$1 = definePropertyModule$3.f;
+       var nativeGetOwnPropertyNames = getOwnPropertyNamesExternal.f;
+       var nativePropertyIsEnumerable = propertyIsEnumerableModule$1.f;
+       var AllSymbols = shared$1('symbols');
+       var ObjectPrototypeSymbols = shared$1('op-symbols');
+       var StringToSymbolRegistry = shared$1('string-to-symbol-registry');
+       var SymbolToStringRegistry = shared$1('symbol-to-string-registry');
+       var WellKnownSymbolsStore = shared$1('wks');
+       var QObject = global$s.QObject;
+       // Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173
+       var USE_SETTER = !QObject || !QObject[PROTOTYPE$1] || !QObject[PROTOTYPE$1].findChild;
+
+       // fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687
+       var setSymbolDescriptor = DESCRIPTORS$h && fails$F(function () {
+         return nativeObjectCreate(nativeDefineProperty$1({}, 'a', {
+           get: function () { return nativeDefineProperty$1(this, 'a', { value: 7 }).a; }
+         })).a != 7;
+       }) ? function (O, P, Attributes) {
+         var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor$2(ObjectPrototype$2, P);
+         if (ObjectPrototypeDescriptor) delete ObjectPrototype$2[P];
+         nativeDefineProperty$1(O, P, Attributes);
+         if (ObjectPrototypeDescriptor && O !== ObjectPrototype$2) {
+           nativeDefineProperty$1(ObjectPrototype$2, P, ObjectPrototypeDescriptor);
+         }
+       } : nativeDefineProperty$1;
+
+       var wrap$2 = function (tag, description) {
+         var symbol = AllSymbols[tag] = nativeObjectCreate($Symbol[PROTOTYPE$1]);
+         setInternalState$6(symbol, {
+           type: SYMBOL,
+           tag: tag,
+           description: description
+         });
+         if (!DESCRIPTORS$h) symbol.description = description;
+         return symbol;
+       };

 
 

-       var ToInteger = function ToInteger(value) {
-               var number = ToNumber(value);
-               if (_isNaN(number)) { return 0; }
-               if (number === 0 || !_isFinite(number)) { return number; }
-               return sign$1(number) * $floor($abs(number));
+       var isSymbol$1 = USE_SYMBOL_AS_UID ? function (it) {
+         return typeof it == 'symbol';
+       } : function (it) {
+         return Object(it) instanceof $Symbol;

        };
 
        };
 

-       var $apply = GetIntrinsic('%Function.prototype.apply%');
-       var $call = GetIntrinsic('%Function.prototype.call%');
-       var $reflectApply = GetIntrinsic('%Reflect.apply%', true) || functionBind.call($call, $apply);
+       var $defineProperty = function defineProperty(O, P, Attributes) {
+         if (O === ObjectPrototype$2) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
+         anObject$g(O);
+         var key = toPrimitive$4(P, true);
+         anObject$g(Attributes);
+         if (has$8(AllSymbols, key)) {
+           if (!Attributes.enumerable) {
+             if (!has$8(O, HIDDEN)) nativeDefineProperty$1(O, HIDDEN, createPropertyDescriptor$3(1, {}));
+             O[HIDDEN][key] = true;
+           } else {
+             if (has$8(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
+             Attributes = nativeObjectCreate(Attributes, { enumerable: createPropertyDescriptor$3(0, false) });
+           } return setSymbolDescriptor(O, key, Attributes);
+         } return nativeDefineProperty$1(O, key, Attributes);
+       };
+
+       var $defineProperties = function defineProperties(O, Properties) {
+         anObject$g(O);
+         var properties = toIndexedObject$5(Properties);
+         var keys = objectKeys$2(properties).concat($getOwnPropertySymbols(properties));
+         $forEach$2(keys, function (key) {
+           if (!DESCRIPTORS$h || $propertyIsEnumerable.call(properties, key)) $defineProperty(O, key, properties[key]);
+         });
+         return O;
+       };

 
 

-       var callBind = function callBind() {
-               return $reflectApply(functionBind, $call, arguments);
+       var $create = function create(O, Properties) {
+         return Properties === undefined ? nativeObjectCreate(O) : $defineProperties(nativeObjectCreate(O), Properties);

        };
 
        };
 

-       var apply = function applyBind() {
-               return $reflectApply(functionBind, $apply, arguments);
+       var $propertyIsEnumerable = function propertyIsEnumerable(V) {
+         var P = toPrimitive$4(V, true);
+         var enumerable = nativePropertyIsEnumerable.call(this, P);
+         if (this === ObjectPrototype$2 && has$8(AllSymbols, P) && !has$8(ObjectPrototypeSymbols, P)) return false;
+         return enumerable || !has$8(this, P) || !has$8(AllSymbols, P) || has$8(this, HIDDEN) && this[HIDDEN][P] ? enumerable : true;

        };
        };

-       callBind.apply = apply;

 
 

-       var $indexOf = callBind(GetIntrinsic('String.prototype.indexOf'));
+       var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) {
+         var it = toIndexedObject$5(O);
+         var key = toPrimitive$4(P, true);
+         if (it === ObjectPrototype$2 && has$8(AllSymbols, key) && !has$8(ObjectPrototypeSymbols, key)) return;
+         var descriptor = nativeGetOwnPropertyDescriptor$2(it, key);
+         if (descriptor && has$8(AllSymbols, key) && !(has$8(it, HIDDEN) && it[HIDDEN][key])) {
+           descriptor.enumerable = true;
+         }
+         return descriptor;
+       };

 
 

-       var callBound = function callBoundIntrinsic(name, allowMissing) {
-               var intrinsic = GetIntrinsic(name, !!allowMissing);
-               if (typeof intrinsic === 'function' && $indexOf(name, '.prototype.')) {
-                       return callBind(intrinsic);
-               }
-               return intrinsic;
+       var $getOwnPropertyNames = function getOwnPropertyNames(O) {
+         var names = nativeGetOwnPropertyNames(toIndexedObject$5(O));
+         var result = [];
+         $forEach$2(names, function (key) {
+           if (!has$8(AllSymbols, key) && !has$8(hiddenKeys$1, key)) result.push(key);
+         });
+         return result;

        };
 
        };
 

-       var $test = GetIntrinsic('RegExp.prototype.test');
+       var $getOwnPropertySymbols = function getOwnPropertySymbols(O) {
+         var IS_OBJECT_PROTOTYPE = O === ObjectPrototype$2;
+         var names = nativeGetOwnPropertyNames(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject$5(O));
+         var result = [];
+         $forEach$2(names, function (key) {
+           if (has$8(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has$8(ObjectPrototype$2, key))) {
+             result.push(AllSymbols[key]);
+           }
+         });
+         return result;
+       };

 
 

+       // `Symbol` constructor
+       // https://tc39.es/ecma262/#sec-symbol-constructor
+       if (!NATIVE_SYMBOL) {
+         $Symbol = function Symbol() {
+           if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor');
+           var description = !arguments.length || arguments[0] === undefined ? undefined : String(arguments[0]);
+           var tag = uid$2(description);
+           var setter = function (value) {
+             if (this === ObjectPrototype$2) setter.call(ObjectPrototypeSymbols, value);
+             if (has$8(this, HIDDEN) && has$8(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
+             setSymbolDescriptor(this, tag, createPropertyDescriptor$3(1, value));
+           };
+           if (DESCRIPTORS$h && USE_SETTER) setSymbolDescriptor(ObjectPrototype$2, tag, { configurable: true, set: setter });
+           return wrap$2(tag, description);
+         };

 
 

+         redefine$b($Symbol[PROTOTYPE$1], 'toString', function toString() {
+           return getInternalState$4(this).tag;
+         });

 
 

-       var regexTester = function regexTester(regex) {
-               return callBind($test, regex);
-       };
+         redefine$b($Symbol, 'withoutSetter', function (description) {
+           return wrap$2(uid$2(description), description);
+         });

 
 

-       var isPrimitive = function isPrimitive(value) {
-               return value === null || (typeof value !== 'function' && typeof value !== 'object');
-       };
+         propertyIsEnumerableModule$1.f = $propertyIsEnumerable;
+         definePropertyModule$3.f = $defineProperty;
+         getOwnPropertyDescriptorModule$2.f = $getOwnPropertyDescriptor;
+         getOwnPropertyNamesModule.f = getOwnPropertyNamesExternal.f = $getOwnPropertyNames;
+         getOwnPropertySymbolsModule$1.f = $getOwnPropertySymbols;

 
 

-       var isPrimitive$1 = function isPrimitive(value) {
-               return value === null || (typeof value !== 'function' && typeof value !== 'object');
-       };
+         wrappedWellKnownSymbolModule.f = function (name) {
+           return wrap$2(wellKnownSymbol$i(name), name);
+         };

 
 

-       var fnToStr = Function.prototype.toString;
-       var reflectApply = typeof Reflect === 'object' && Reflect !== null && Reflect.apply;
-       var badArrayLike;
-       var isCallableMarker;
-       if (typeof reflectApply === 'function' && typeof Object.defineProperty === 'function') {
-               try {
-                       badArrayLike = Object.defineProperty({}, 'length', {
-                               get: function () {
-                                       throw isCallableMarker;
-                               }
-                       });
-                       isCallableMarker = {};
-               } catch (_) {
-                       reflectApply = null;
-               }
-       } else {
-               reflectApply = null;
+         if (DESCRIPTORS$h) {
+           // https://github.com/tc39/proposal-Symbol-description
+           nativeDefineProperty$1($Symbol[PROTOTYPE$1], 'description', {
+             configurable: true,
+             get: function description() {
+               return getInternalState$4(this).description;
+             }
+           });
+           {
+             redefine$b(ObjectPrototype$2, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });
+           }
+         }

        }
 
        }
 

-       var constructorRegex = /^\s*class\b/;
-       var isES6ClassFn = function isES6ClassFunction(value) {
-               try {
-                       var fnStr = fnToStr.call(value);
-                       return constructorRegex.test(fnStr);
-               } catch (e) {
-                       return false; // not a function
-               }
-       };
+       $$14({ global: true, wrap: true, forced: !NATIVE_SYMBOL, sham: !NATIVE_SYMBOL }, {
+         Symbol: $Symbol
+       });

 
 

-       var tryFunctionObject = function tryFunctionToStr(value) {
-               try {
-                       if (isES6ClassFn(value)) { return false; }
-                       fnToStr.call(value);
-                       return true;
-               } catch (e) {
-                       return false;
-               }
-       };
-       var toStr$4 = Object.prototype.toString;
-       var fnClass = '[object Function]';
-       var genClass = '[object GeneratorFunction]';
-       var hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
-
-       var isCallable = reflectApply
-               ? function isCallable(value) {
-                       if (!value) { return false; }
-                       if (typeof value !== 'function' && typeof value !== 'object') { return false; }
-                       if (typeof value === 'function' && !value.prototype) { return true; }
-                       try {
-                               reflectApply(value, null, badArrayLike);
-                       } catch (e) {
-                               if (e !== isCallableMarker) { return false; }
-                       }
-                       return !isES6ClassFn(value);
-               }
-               : function isCallable(value) {
-                       if (!value) { return false; }
-                       if (typeof value !== 'function' && typeof value !== 'object') { return false; }
-                       if (typeof value === 'function' && !value.prototype) { return true; }
-                       if (hasToStringTag) { return tryFunctionObject(value); }
-                       if (isES6ClassFn(value)) { return false; }
-                       var strClass = toStr$4.call(value);
-                       return strClass === fnClass || strClass === genClass;
-               };
-
-       var getDay = Date.prototype.getDay;
-       var tryDateObject = function tryDateGetDayCall(value) {
-               try {
-                       getDay.call(value);
-                       return true;
-               } catch (e) {
-                       return false;
-               }
-       };
+       $forEach$2(objectKeys$2(WellKnownSymbolsStore), function (name) {
+         defineWellKnownSymbol$2(name);
+       });

 
 

-       var toStr$5 = Object.prototype.toString;
-       var dateClass = '[object Date]';
-       var hasToStringTag$1 = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
+       $$14({ target: SYMBOL, stat: true, forced: !NATIVE_SYMBOL }, {
+         // `Symbol.for` method
+         // https://tc39.es/ecma262/#sec-symbol.for
+         'for': function (key) {
+           var string = String(key);
+           if (has$8(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];
+           var symbol = $Symbol(string);
+           StringToSymbolRegistry[string] = symbol;
+           SymbolToStringRegistry[symbol] = string;
+           return symbol;
+         },
+         // `Symbol.keyFor` method
+         // https://tc39.es/ecma262/#sec-symbol.keyfor
+         keyFor: function keyFor(sym) {
+           if (!isSymbol$1(sym)) throw TypeError(sym + ' is not a symbol');
+           if (has$8(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
+         },
+         useSetter: function () { USE_SETTER = true; },
+         useSimple: function () { USE_SETTER = false; }
+       });

 
 

-       var isDateObject = function isDateObject(value) {
-               if (typeof value !== 'object' || value === null) {
-                       return false;
-               }
-               return hasToStringTag$1 ? tryDateObject(value) : toStr$5.call(value) === dateClass;
-       };
+       $$14({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL, sham: !DESCRIPTORS$h }, {
+         // `Object.create` method
+         // https://tc39.es/ecma262/#sec-object.create
+         create: $create,
+         // `Object.defineProperty` method
+         // https://tc39.es/ecma262/#sec-object.defineproperty
+         defineProperty: $defineProperty,
+         // `Object.defineProperties` method
+         // https://tc39.es/ecma262/#sec-object.defineproperties
+         defineProperties: $defineProperties,
+         // `Object.getOwnPropertyDescriptor` method
+         // https://tc39.es/ecma262/#sec-object.getownpropertydescriptors
+         getOwnPropertyDescriptor: $getOwnPropertyDescriptor
+       });

 
 

-       var isSymbol$2 = createCommonjsModule(function (module) {
-
-       var toStr = Object.prototype.toString;
-       var hasSymbols = hasSymbols$1();
-
-       if (hasSymbols) {
-               var symToStr = Symbol.prototype.toString;
-               var symStringRegex = /^Symbol\(.*\)$/;
-               var isSymbolObject = function isRealSymbolObject(value) {
-                       if (typeof value.valueOf() !== 'symbol') {
-                               return false;
-                       }
-                       return symStringRegex.test(symToStr.call(value));
-               };
-
-               module.exports = function isSymbol(value) {
-                       if (typeof value === 'symbol') {
-                               return true;
-                       }
-                       if (toStr.call(value) !== '[object Symbol]') {
-                               return false;
-                       }
-                       try {
-                               return isSymbolObject(value);
-                       } catch (e) {
-                               return false;
-                       }
-               };
-       } else {
+       $$14({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL }, {
+         // `Object.getOwnPropertyNames` method
+         // https://tc39.es/ecma262/#sec-object.getownpropertynames
+         getOwnPropertyNames: $getOwnPropertyNames,
+         // `Object.getOwnPropertySymbols` method
+         // https://tc39.es/ecma262/#sec-object.getownpropertysymbols
+         getOwnPropertySymbols: $getOwnPropertySymbols
+       });

 
 

-               module.exports = function isSymbol(value) {
-                       // this environment does not support Symbols.
-                       return false ;
-               };
-       }
+       // Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives
+       // https://bugs.chromium.org/p/v8/issues/detail?id=3443
+       $$14({ target: 'Object', stat: true, forced: fails$F(function () { getOwnPropertySymbolsModule$1.f(1); }) }, {
+         getOwnPropertySymbols: function getOwnPropertySymbols(it) {
+           return getOwnPropertySymbolsModule$1.f(toObject$e(it));
+         }

        });
 
        });
 

-       var hasSymbols$3 = typeof Symbol === 'function' && typeof Symbol.iterator === 'symbol';
+       // `JSON.stringify` method behavior with symbols
+       // https://tc39.es/ecma262/#sec-json.stringify
+       if ($stringify) {
+         var FORCED_JSON_STRINGIFY = !NATIVE_SYMBOL || fails$F(function () {
+           var symbol = $Symbol();
+           // MS Edge converts symbol values to JSON as {}
+           return $stringify([symbol]) != '[null]'
+             // WebKit converts symbol values to JSON as null
+             || $stringify({ a: symbol }) != '{}'
+             // V8 throws on boxed symbols
+             || $stringify(Object(symbol)) != '{}';
+         });

 
 

+         $$14({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {
+           // eslint-disable-next-line no-unused-vars -- required for `.length`
+           stringify: function stringify(it, replacer, space) {
+             var args = [it];
+             var index = 1;
+             var $replacer;
+             while (arguments.length > index) args.push(arguments[index++]);
+             $replacer = replacer;
+             if (!isObject$k(replacer) && it === undefined || isSymbol$1(it)) return; // IE8 returns string on undefined
+             if (!isArray$4(replacer)) replacer = function (key, value) {
+               if (typeof $replacer == 'function') value = $replacer.call(this, key, value);
+               if (!isSymbol$1(value)) return value;
+             };
+             args[1] = replacer;
+             return $stringify.apply(null, args);
+           }
+         });
+       }

 
 

+       // `Symbol.prototype[@@toPrimitive]` method
+       // https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive
+       if (!$Symbol[PROTOTYPE$1][TO_PRIMITIVE]) {
+         createNonEnumerableProperty$6($Symbol[PROTOTYPE$1], TO_PRIMITIVE, $Symbol[PROTOTYPE$1].valueOf);
+       }
+       // `Symbol.prototype[@@toStringTag]` property
+       // https://tc39.es/ecma262/#sec-symbol.prototype-@@tostringtag
+       setToStringTag$7($Symbol, SYMBOL);
+
+       hiddenKeys$1[HIDDEN] = true;
+
+       var $$13 = _export;
+       var DESCRIPTORS$g = descriptors;
+       var global$r = global$F;
+       var has$7 = has$j;
+       var isObject$j = isObject$r;
+       var defineProperty$8 = objectDefineProperty.f;
+       var copyConstructorProperties = copyConstructorProperties$2;
+
+       var NativeSymbol = global$r.Symbol;
+
+       if (DESCRIPTORS$g && typeof NativeSymbol == 'function' && (!('description' in NativeSymbol.prototype) ||
+         // Safari 12 bug
+         NativeSymbol().description !== undefined
+       )) {
+         var EmptyStringDescriptionStore = {};
+         // wrap Symbol constructor for correct work with undefined description
+         var SymbolWrapper = function Symbol() {
+           var description = arguments.length < 1 || arguments[0] === undefined ? undefined : String(arguments[0]);
+           var result = this instanceof SymbolWrapper
+             ? new NativeSymbol(description)
+             // in Edge 13, String(Symbol(undefined)) === 'Symbol(undefined)'
+             : description === undefined ? NativeSymbol() : NativeSymbol(description);
+           if (description === '') EmptyStringDescriptionStore[result] = true;
+           return result;
+         };
+         copyConstructorProperties(SymbolWrapper, NativeSymbol);
+         var symbolPrototype = SymbolWrapper.prototype = NativeSymbol.prototype;
+         symbolPrototype.constructor = SymbolWrapper;

 
 

+         var symbolToString = symbolPrototype.toString;
+         var native = String(NativeSymbol('test')) == 'Symbol(test)';
+         var regexp = /^Symbol\((.*)\)[^)]+$/;
+         defineProperty$8(symbolPrototype, 'description', {
+           configurable: true,
+           get: function description() {
+             var symbol = isObject$j(this) ? this.valueOf() : this;
+             var string = symbolToString.call(symbol);
+             if (has$7(EmptyStringDescriptionStore, symbol)) return '';
+             var desc = native ? string.slice(7, -1) : string.replace(regexp, '$1');
+             return desc === '' ? undefined : desc;
+           }
+         });

 
 

+         $$13({ global: true, forced: true }, {
+           Symbol: SymbolWrapper
+         });
+       }

 
 

+       // eslint-disable-next-line es/no-typed-arrays -- safe
+       var arrayBufferNative = typeof ArrayBuffer !== 'undefined' && typeof DataView !== 'undefined';

 
 

-       var ordinaryToPrimitive = function OrdinaryToPrimitive(O, hint) {
-               if (typeof O === 'undefined' || O === null) {
-                       throw new TypeError('Cannot call method on ' + O);
-               }
-               if (typeof hint !== 'string' || (hint !== 'number' && hint !== 'string')) {
-                       throw new TypeError('hint must be "string" or "number"');
-               }
-               var methodNames = hint === 'string' ? ['toString', 'valueOf'] : ['valueOf', 'toString'];
-               var method, result, i;
-               for (i = 0; i < methodNames.length; ++i) {
-                       method = O[methodNames[i]];
-                       if (isCallable(method)) {
-                               result = method.call(O);
-                               if (isPrimitive$1(result)) {
-                                       return result;
-                               }
-                       }
-               }
-               throw new TypeError('No default value');
-       };
+       var redefine$a = redefine$g.exports;

 
 

-       var GetMethod = function GetMethod(O, P) {
-               var func = O[P];
-               if (func !== null && typeof func !== 'undefined') {
-                       if (!isCallable(func)) {
-                               throw new TypeError(func + ' returned for property ' + P + ' of object ' + O + ' is not a function');
-                       }
-                       return func;
-               }
-               return void 0;
+       var redefineAll$4 = function (target, src, options) {
+         for (var key in src) redefine$a(target, key, src[key], options);
+         return target;

        };
 
        };
 

-       // http://www.ecma-international.org/ecma-262/6.0/#sec-toprimitive
-       var es2015 = function ToPrimitive(input) {
-               if (isPrimitive$1(input)) {
-                       return input;
-               }
-               var hint = 'default';
-               if (arguments.length > 1) {
-                       if (arguments[1] === String) {
-                               hint = 'string';
-                       } else if (arguments[1] === Number) {
-                               hint = 'number';
-                       }
-               }
-
-               var exoticToPrim;
-               if (hasSymbols$3) {
-                       if (Symbol.toPrimitive) {
-                               exoticToPrim = GetMethod(input, Symbol.toPrimitive);
-                       } else if (isSymbol$2(input)) {
-                               exoticToPrim = Symbol.prototype.valueOf;
-                       }
-               }
-               if (typeof exoticToPrim !== 'undefined') {
-                       var result = exoticToPrim.call(input, hint);
-                       if (isPrimitive$1(result)) {
-                               return result;
-                       }
-                       throw new TypeError('unable to convert exotic object to primitive');
-               }
-               if (hint === 'default' && (isDateObject(input) || isSymbol$2(input))) {
-                       hint = 'string';
-               }
-               return ordinaryToPrimitive(input, hint === 'default' ? 'number' : hint);
+       var anInstance$7 = function (it, Constructor, name) {
+         if (!(it instanceof Constructor)) {
+           throw TypeError('Incorrect ' + (name ? name + ' ' : '') + 'invocation');
+         } return it;

        };
 
        };
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-toprimitive
+       var toInteger$7 = toInteger$b;
+       var toLength$n = toLength$q;

 
 

-       var ToPrimitive = function ToPrimitive(input) {
-               if (arguments.length > 1) {
-                       return es2015(input, arguments[1]);
-               }
-               return es2015(input);
+       // `ToIndex` abstract operation
+       // https://tc39.es/ecma262/#sec-toindex
+       var toIndex$2 = function (it) {
+         if (it === undefined) return 0;
+         var number = toInteger$7(it);
+         var length = toLength$n(number);
+         if (number !== length) throw RangeError('Wrong length or index');
+         return length;

        };
 
        };
 

-       var $TypeError$2 = GetIntrinsic('%TypeError%');
-       var $Number$1 = GetIntrinsic('%Number%');
-       var $RegExp = GetIntrinsic('%RegExp%');
-       var $parseInteger = GetIntrinsic('%parseInt%');
-
+       // IEEE754 conversions based on https://github.com/feross/ieee754
+       var abs$4 = Math.abs;
+       var pow$2 = Math.pow;
+       var floor$6 = Math.floor;
+       var log$2 = Math.log;
+       var LN2 = Math.LN2;

 
 

+       var pack = function (number, mantissaLength, bytes) {
+         var buffer = new Array(bytes);
+         var exponentLength = bytes * 8 - mantissaLength - 1;
+         var eMax = (1 << exponentLength) - 1;
+         var eBias = eMax >> 1;
+         var rt = mantissaLength === 23 ? pow$2(2, -24) - pow$2(2, -77) : 0;
+         var sign = number < 0 || number === 0 && 1 / number < 0 ? 1 : 0;
+         var index = 0;
+         var exponent, mantissa, c;
+         number = abs$4(number);
+         // eslint-disable-next-line no-self-compare -- NaN check
+         if (number != number || number === Infinity) {
+           // eslint-disable-next-line no-self-compare -- NaN check
+           mantissa = number != number ? 1 : 0;
+           exponent = eMax;
+         } else {
+           exponent = floor$6(log$2(number) / LN2);
+           if (number * (c = pow$2(2, -exponent)) < 1) {
+             exponent--;
+             c *= 2;
+           }
+           if (exponent + eBias >= 1) {
+             number += rt / c;
+           } else {
+             number += rt * pow$2(2, 1 - eBias);
+           }
+           if (number * c >= 2) {
+             exponent++;
+             c /= 2;
+           }
+           if (exponent + eBias >= eMax) {
+             mantissa = 0;
+             exponent = eMax;
+           } else if (exponent + eBias >= 1) {
+             mantissa = (number * c - 1) * pow$2(2, mantissaLength);
+             exponent = exponent + eBias;
+           } else {
+             mantissa = number * pow$2(2, eBias - 1) * pow$2(2, mantissaLength);
+             exponent = 0;
+           }
+         }
+         for (; mantissaLength >= 8; buffer[index++] = mantissa & 255, mantissa /= 256, mantissaLength -= 8);
+         exponent = exponent << mantissaLength | mantissa;
+         exponentLength += mantissaLength;
+         for (; exponentLength > 0; buffer[index++] = exponent & 255, exponent /= 256, exponentLength -= 8);
+         buffer[--index] |= sign * 128;
+         return buffer;
+       };

 
 

-
-
-       var $strSlice = callBound('String.prototype.slice');
-       var isBinary = regexTester(/^0b[01]+$/i);
-       var isOctal = regexTester(/^0o[0-7]+$/i);
-       var isInvalidHexLiteral = regexTester(/^[-+]0x[0-9a-f]+$/i);
-       var nonWS = ['\u0085', '\u200b', '\ufffe'].join('');
-       var nonWSregex = new $RegExp('[' + nonWS + ']', 'g');
-       var hasNonWS = regexTester(nonWSregex);
-
-       // whitespace from: https://es5.github.io/#x15.5.4.20
-       // implementation from https://github.com/es-shims/es5-shim/blob/v3.4.0/es5-shim.js#L1304-L1324
-       var ws = [
-               '\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u180E\u2000\u2001\u2002\u2003',
-               '\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028',
-               '\u2029\uFEFF'
-       ].join('');
-       var trimRegex = new RegExp('(^[' + ws + ']+)|([' + ws + ']+$)', 'g');
-       var $replace$1 = callBound('String.prototype.replace');
-       var $trim = function (value) {
-               return $replace$1(value, trimRegex, '');
+       var unpack = function (buffer, mantissaLength) {
+         var bytes = buffer.length;
+         var exponentLength = bytes * 8 - mantissaLength - 1;
+         var eMax = (1 << exponentLength) - 1;
+         var eBias = eMax >> 1;
+         var nBits = exponentLength - 7;
+         var index = bytes - 1;
+         var sign = buffer[index--];
+         var exponent = sign & 127;
+         var mantissa;
+         sign >>= 7;
+         for (; nBits > 0; exponent = exponent * 256 + buffer[index], index--, nBits -= 8);
+         mantissa = exponent & (1 << -nBits) - 1;
+         exponent >>= -nBits;
+         nBits += mantissaLength;
+         for (; nBits > 0; mantissa = mantissa * 256 + buffer[index], index--, nBits -= 8);
+         if (exponent === 0) {
+           exponent = 1 - eBias;
+         } else if (exponent === eMax) {
+           return mantissa ? NaN : sign ? -Infinity : Infinity;
+         } else {
+           mantissa = mantissa + pow$2(2, mantissaLength);
+           exponent = exponent - eBias;
+         } return (sign ? -1 : 1) * mantissa * pow$2(2, exponent - mantissaLength);

        };
 
        };
 

+       var ieee754$2 = {
+         pack: pack,
+         unpack: unpack
+       };

 
 

+       var toObject$d = toObject$i;
+       var toAbsoluteIndex$6 = toAbsoluteIndex$8;
+       var toLength$m = toLength$q;

 
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-tonumber
-
-       var ToNumber$1 = function ToNumber(argument) {
-               var value = isPrimitive(argument) ? argument : ToPrimitive(argument, $Number$1);
-               if (typeof value === 'symbol') {
-                       throw new $TypeError$2('Cannot convert a Symbol value to a number');
-               }
-               if (typeof value === 'string') {
-                       if (isBinary(value)) {
-                               return ToNumber($parseInteger($strSlice(value, 2), 2));
-                       } else if (isOctal(value)) {
-                               return ToNumber($parseInteger($strSlice(value, 2), 8));
-                       } else if (hasNonWS(value) || isInvalidHexLiteral(value)) {
-                               return NaN;
-                       } else {
-                               var trimmed = $trim(value);
-                               if (trimmed !== value) {
-                                       return ToNumber(trimmed);
-                               }
-                       }
-               }
-               return $Number$1(value);
-       };
+       // `Array.prototype.fill` method implementation
+       // https://tc39.es/ecma262/#sec-array.prototype.fill
+       var arrayFill$1 = function fill(value /* , start = 0, end = @length */) {
+         var O = toObject$d(this);
+         var length = toLength$m(O.length);
+         var argumentsLength = arguments.length;
+         var index = toAbsoluteIndex$6(argumentsLength > 1 ? arguments[1] : undefined, length);
+         var end = argumentsLength > 2 ? arguments[2] : undefined;
+         var endPos = end === undefined ? length : toAbsoluteIndex$6(end, length);
+         while (endPos > index) O[index++] = value;
+         return O;
+       };
+
+       var global$q = global$F;
+       var DESCRIPTORS$f = descriptors;
+       var NATIVE_ARRAY_BUFFER$2 = arrayBufferNative;
+       var createNonEnumerableProperty$5 = createNonEnumerableProperty$e;
+       var redefineAll$3 = redefineAll$4;
+       var fails$E = fails$N;
+       var anInstance$6 = anInstance$7;
+       var toInteger$6 = toInteger$b;
+       var toLength$l = toLength$q;
+       var toIndex$1 = toIndex$2;
+       var IEEE754 = ieee754$2;
+       var getPrototypeOf$2 = objectGetPrototypeOf;
+       var setPrototypeOf$5 = objectSetPrototypeOf;
+       var getOwnPropertyNames$4 = objectGetOwnPropertyNames.f;
+       var defineProperty$7 = objectDefineProperty.f;
+       var arrayFill = arrayFill$1;
+       var setToStringTag$6 = setToStringTag$a;
+       var InternalStateModule$5 = internalState;
+
+       var getInternalState$3 = InternalStateModule$5.get;
+       var setInternalState$5 = InternalStateModule$5.set;
+       var ARRAY_BUFFER$1 = 'ArrayBuffer';
+       var DATA_VIEW = 'DataView';
+       var PROTOTYPE = 'prototype';
+       var WRONG_LENGTH$1 = 'Wrong length';
+       var WRONG_INDEX = 'Wrong index';
+       var NativeArrayBuffer$1 = global$q[ARRAY_BUFFER$1];
+       var $ArrayBuffer = NativeArrayBuffer$1;
+       var $DataView = global$q[DATA_VIEW];
+       var $DataViewPrototype = $DataView && $DataView[PROTOTYPE];
+       var ObjectPrototype$1 = Object.prototype;
+       var RangeError$2 = global$q.RangeError;
+
+       var packIEEE754 = IEEE754.pack;
+       var unpackIEEE754 = IEEE754.unpack;
+
+       var packInt8 = function (number) {
+         return [number & 0xFF];
+       };
+
+       var packInt16 = function (number) {
+         return [number & 0xFF, number >> 8 & 0xFF];
+       };
+
+       var packInt32 = function (number) {
+         return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];
+       };
+
+       var unpackInt32 = function (buffer) {
+         return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
+       };
+
+       var packFloat32 = function (number) {
+         return packIEEE754(number, 23, 4);
+       };
+
+       var packFloat64 = function (number) {
+         return packIEEE754(number, 52, 8);
+       };
+
+       var addGetter$1 = function (Constructor, key) {
+         defineProperty$7(Constructor[PROTOTYPE], key, { get: function () { return getInternalState$3(this)[key]; } });
+       };
+
+       var get$4 = function (view, count, index, isLittleEndian) {
+         var intIndex = toIndex$1(index);
+         var store = getInternalState$3(view);
+         if (intIndex + count > store.byteLength) throw RangeError$2(WRONG_INDEX);
+         var bytes = getInternalState$3(store.buffer).bytes;
+         var start = intIndex + store.byteOffset;
+         var pack = bytes.slice(start, start + count);
+         return isLittleEndian ? pack : pack.reverse();
+       };
+
+       var set$3 = function (view, count, index, conversion, value, isLittleEndian) {
+         var intIndex = toIndex$1(index);
+         var store = getInternalState$3(view);
+         if (intIndex + count > store.byteLength) throw RangeError$2(WRONG_INDEX);
+         var bytes = getInternalState$3(store.buffer).bytes;
+         var start = intIndex + store.byteOffset;
+         var pack = conversion(+value);
+         for (var i = 0; i < count; i++) bytes[start + i] = pack[isLittleEndian ? i : count - i - 1];
+       };
+
+       if (!NATIVE_ARRAY_BUFFER$2) {
+         $ArrayBuffer = function ArrayBuffer(length) {
+           anInstance$6(this, $ArrayBuffer, ARRAY_BUFFER$1);
+           var byteLength = toIndex$1(length);
+           setInternalState$5(this, {
+             bytes: arrayFill.call(new Array(byteLength), 0),
+             byteLength: byteLength
+           });
+           if (!DESCRIPTORS$f) this.byteLength = byteLength;
+         };
+
+         $DataView = function DataView(buffer, byteOffset, byteLength) {
+           anInstance$6(this, $DataView, DATA_VIEW);
+           anInstance$6(buffer, $ArrayBuffer, DATA_VIEW);
+           var bufferLength = getInternalState$3(buffer).byteLength;
+           var offset = toInteger$6(byteOffset);
+           if (offset < 0 || offset > bufferLength) throw RangeError$2('Wrong offset');
+           byteLength = byteLength === undefined ? bufferLength - offset : toLength$l(byteLength);
+           if (offset + byteLength > bufferLength) throw RangeError$2(WRONG_LENGTH$1);
+           setInternalState$5(this, {
+             buffer: buffer,
+             byteLength: byteLength,
+             byteOffset: offset
+           });
+           if (!DESCRIPTORS$f) {
+             this.buffer = buffer;
+             this.byteLength = byteLength;
+             this.byteOffset = offset;
+           }
+         };

 
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-tointeger
+         if (DESCRIPTORS$f) {
+           addGetter$1($ArrayBuffer, 'byteLength');
+           addGetter$1($DataView, 'buffer');
+           addGetter$1($DataView, 'byteLength');
+           addGetter$1($DataView, 'byteOffset');
+         }

 
 

-       var ToInteger$1 = function ToInteger$1(value) {
-               var number = ToNumber$1(value);
-               return ToInteger(number);
-       };
+         redefineAll$3($DataView[PROTOTYPE], {
+           getInt8: function getInt8(byteOffset) {
+             return get$4(this, 1, byteOffset)[0] << 24 >> 24;
+           },
+           getUint8: function getUint8(byteOffset) {
+             return get$4(this, 1, byteOffset)[0];
+           },
+           getInt16: function getInt16(byteOffset /* , littleEndian */) {
+             var bytes = get$4(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
+             return (bytes[1] << 8 | bytes[0]) << 16 >> 16;
+           },
+           getUint16: function getUint16(byteOffset /* , littleEndian */) {
+             var bytes = get$4(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
+             return bytes[1] << 8 | bytes[0];
+           },
+           getInt32: function getInt32(byteOffset /* , littleEndian */) {
+             return unpackInt32(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));
+           },
+           getUint32: function getUint32(byteOffset /* , littleEndian */) {
+             return unpackInt32(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;
+           },
+           getFloat32: function getFloat32(byteOffset /* , littleEndian */) {
+             return unpackIEEE754(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);
+           },
+           getFloat64: function getFloat64(byteOffset /* , littleEndian */) {
+             return unpackIEEE754(get$4(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);
+           },
+           setInt8: function setInt8(byteOffset, value) {
+             set$3(this, 1, byteOffset, packInt8, value);
+           },
+           setUint8: function setUint8(byteOffset, value) {
+             set$3(this, 1, byteOffset, packInt8, value);
+           },
+           setInt16: function setInt16(byteOffset, value /* , littleEndian */) {
+             set$3(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
+           },
+           setUint16: function setUint16(byteOffset, value /* , littleEndian */) {
+             set$3(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
+           },
+           setInt32: function setInt32(byteOffset, value /* , littleEndian */) {
+             set$3(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
+           },
+           setUint32: function setUint32(byteOffset, value /* , littleEndian */) {
+             set$3(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
+           },
+           setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {
+             set$3(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);
+           },
+           setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {
+             set$3(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);
+           }
+         });
+       } else {
+         /* eslint-disable no-new -- required for testing */
+         if (!fails$E(function () {
+           NativeArrayBuffer$1(1);
+         }) || !fails$E(function () {
+           new NativeArrayBuffer$1(-1);
+         }) || fails$E(function () {
+           new NativeArrayBuffer$1();
+           new NativeArrayBuffer$1(1.5);
+           new NativeArrayBuffer$1(NaN);
+           return NativeArrayBuffer$1.name != ARRAY_BUFFER$1;
+         })) {
+         /* eslint-enable no-new -- required for testing */
+           $ArrayBuffer = function ArrayBuffer(length) {
+             anInstance$6(this, $ArrayBuffer);
+             return new NativeArrayBuffer$1(toIndex$1(length));
+           };
+           var ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE] = NativeArrayBuffer$1[PROTOTYPE];
+           for (var keys$2 = getOwnPropertyNames$4(NativeArrayBuffer$1), j$2 = 0, key$1; keys$2.length > j$2;) {
+             if (!((key$1 = keys$2[j$2++]) in $ArrayBuffer)) {
+               createNonEnumerableProperty$5($ArrayBuffer, key$1, NativeArrayBuffer$1[key$1]);
+             }
+           }
+           ArrayBufferPrototype.constructor = $ArrayBuffer;
+         }

 
 

-       var ToLength = function ToLength(argument) {
-               var len = ToInteger$1(argument);
-               if (len <= 0) { return 0; } // includes converting -0 to +0
-               if (len > maxSafeInteger) { return maxSafeInteger; }
-               return len;
-       };
+         // WebKit bug - the same parent prototype for typed arrays and data view
+         if (setPrototypeOf$5 && getPrototypeOf$2($DataViewPrototype) !== ObjectPrototype$1) {
+           setPrototypeOf$5($DataViewPrototype, ObjectPrototype$1);
+         }

 
 

-       // http://www.ecma-international.org/ecma-262/5.1/#sec-9.11
-
-       var IsCallable = isCallable;
-
-       var implementation$3 = function find(predicate) {
-               var list = ToObject(this);
-               var length = ToLength(list.length);
-               if (!IsCallable(predicate)) {
-                       throw new TypeError('Array#find: predicate must be a function');
-               }
-               if (length === 0) {
-                       return void 0;
-               }
-               var thisArg;
-               if (arguments.length > 0) {
-                       thisArg = arguments[1];
-               }
-
-               for (var i = 0, value; i < length; i++) {
-                       value = list[i];
-                       // inlined for performance: if (Call(predicate, thisArg, [value, i, list])) {
-                       if (predicate.apply(thisArg, [value, i, list])) {
-                               return value;
-                       }
-               }
-               return void 0;
-       };
+         // iOS Safari 7.x bug
+         var testView = new $DataView(new $ArrayBuffer(2));
+         var $setInt8 = $DataViewPrototype.setInt8;
+         testView.setInt8(0, 2147483648);
+         testView.setInt8(1, 2147483649);
+         if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll$3($DataViewPrototype, {
+           setInt8: function setInt8(byteOffset, value) {
+             $setInt8.call(this, byteOffset, value << 24 >> 24);
+           },
+           setUint8: function setUint8(byteOffset, value) {
+             $setInt8.call(this, byteOffset, value << 24 >> 24);
+           }
+         }, { unsafe: true });
+       }

 
 

-       var polyfill$4 = function getPolyfill() {
-               // Detect if an implementation exists
-               // Detect early implementations which skipped holes in sparse arrays
-               // eslint-disable-next-line no-sparse-arrays
-               var implemented = Array.prototype.find && [, 1].find(function () {
-                       return true;
-               }) !== 1;
+       setToStringTag$6($ArrayBuffer, ARRAY_BUFFER$1);
+       setToStringTag$6($DataView, DATA_VIEW);

 
 

-               // eslint-disable-next-line global-require
-               return implemented ? Array.prototype.find : implementation$3;
+       var arrayBuffer = {
+         ArrayBuffer: $ArrayBuffer,
+         DataView: $DataView

        };
 
        };
 

-       var shim$8 = function shimArrayPrototypeFind() {
-               var polyfill = polyfill$4();
+       var anObject$f = anObject$m;
+       var aFunction$7 = aFunction$9;
+       var wellKnownSymbol$h = wellKnownSymbol$s;

 
 

-               defineProperties_1(Array.prototype, { find: polyfill }, {
-                       find: function () {
-                               return Array.prototype.find !== polyfill;
-                       }
-               });
+       var SPECIES$5 = wellKnownSymbol$h('species');

 
 

-               return polyfill;
+       // `SpeciesConstructor` abstract operation
+       // https://tc39.es/ecma262/#sec-speciesconstructor
+       var speciesConstructor$8 = function (O, defaultConstructor) {
+         var C = anObject$f(O).constructor;
+         var S;
+         return C === undefined || (S = anObject$f(C)[SPECIES$5]) == undefined ? defaultConstructor : aFunction$7(S);

        };
 
        };
 

-       var slice$2 = Array.prototype.slice;
+       var $$12 = _export;
+       var fails$D = fails$N;
+       var ArrayBufferModule$2 = arrayBuffer;
+       var anObject$e = anObject$m;
+       var toAbsoluteIndex$5 = toAbsoluteIndex$8;
+       var toLength$k = toLength$q;
+       var speciesConstructor$7 = speciesConstructor$8;

 
 

-       var polyfill$5 = polyfill$4();
+       var ArrayBuffer$4 = ArrayBufferModule$2.ArrayBuffer;
+       var DataView$2 = ArrayBufferModule$2.DataView;
+       var nativeArrayBufferSlice = ArrayBuffer$4.prototype.slice;

 
 

-       var boundFindShim = function find(array, predicate) { // eslint-disable-line no-unused-vars
-               RequireObjectCoercible(array);
-               var args = slice$2.call(arguments, 1);
-               return polyfill$5.apply(array, args);
-       };
+       var INCORRECT_SLICE = fails$D(function () {
+         return !new ArrayBuffer$4(2).slice(1, undefined).byteLength;
+       });

 
 

-       defineProperties_1(boundFindShim, {
-               getPolyfill: polyfill$4,
-               implementation: implementation$3,
-               shim: shim$8
+       // `ArrayBuffer.prototype.slice` method
+       // https://tc39.es/ecma262/#sec-arraybuffer.prototype.slice
+       $$12({ target: 'ArrayBuffer', proto: true, unsafe: true, forced: INCORRECT_SLICE }, {
+         slice: function slice(start, end) {
+           if (nativeArrayBufferSlice !== undefined && end === undefined) {
+             return nativeArrayBufferSlice.call(anObject$e(this), start); // FF fix
+           }
+           var length = anObject$e(this).byteLength;
+           var first = toAbsoluteIndex$5(start, length);
+           var fin = toAbsoluteIndex$5(end === undefined ? length : end, length);
+           var result = new (speciesConstructor$7(this, ArrayBuffer$4))(toLength$k(fin - first));
+           var viewSource = new DataView$2(this);
+           var viewTarget = new DataView$2(result);
+           var index = 0;
+           while (first < fin) {
+             viewTarget.setUint8(index++, viewSource.getUint8(first++));
+           } return result;
+         }

        });
 
        });
 

-       var array_prototype_find = boundFindShim;
-
-       var implementation$4 = function findIndex(predicate) {
-               var list = ToObject(this);
-               var length = ToLength(list.length);
-               if (!IsCallable(predicate)) {
-                       throw new TypeError('Array#findIndex: predicate must be a function');
-               }
-
-               if (length === 0) {
-                       return -1;
-               }
-
-               var thisArg;
-               if (arguments.length > 0) {
-                       thisArg = arguments[1];
-               }
-
-               for (var i = 0, value; i < length; i++) {
-                       value = list[i];
-                       // inlined for performance: if (Call(predicate, thisArg, [value, i, list])) return i;
-                       if (predicate.apply(thisArg, [value, i, list])) {
-                               return i;
-                       }
-               }
-
-               return -1;
-       };
+       var $$11 = _export;
+       var ArrayBufferModule$1 = arrayBuffer;
+       var NATIVE_ARRAY_BUFFER$1 = arrayBufferNative;

 
 

-       var polyfill$6 = function getPolyfill() {
-               // Detect if an implementation exists
-               // Detect early implementations which skipped holes in sparse arrays
-               // eslint-disable-next-line no-sparse-arrays
-               var implemented = Array.prototype.findIndex && ([, 1].findIndex(function (item, idx) {
-                       return idx === 0;
-               }) === 0);
+       // `DataView` constructor
+       // https://tc39.es/ecma262/#sec-dataview-constructor
+       $$11({ global: true, forced: !NATIVE_ARRAY_BUFFER$1 }, {
+         DataView: ArrayBufferModule$1.DataView
+       });

 
 

-               return implemented ? Array.prototype.findIndex : implementation$4;
+       var NATIVE_ARRAY_BUFFER = arrayBufferNative;
+       var DESCRIPTORS$e = descriptors;
+       var global$p = global$F;
+       var isObject$i = isObject$r;
+       var has$6 = has$j;
+       var classof$8 = classof$b;
+       var createNonEnumerableProperty$4 = createNonEnumerableProperty$e;
+       var redefine$9 = redefine$g.exports;
+       var defineProperty$6 = objectDefineProperty.f;
+       var getPrototypeOf$1 = objectGetPrototypeOf;
+       var setPrototypeOf$4 = objectSetPrototypeOf;
+       var wellKnownSymbol$g = wellKnownSymbol$s;
+       var uid$1 = uid$5;
+
+       var Int8Array$3 = global$p.Int8Array;
+       var Int8ArrayPrototype = Int8Array$3 && Int8Array$3.prototype;
+       var Uint8ClampedArray = global$p.Uint8ClampedArray;
+       var Uint8ClampedArrayPrototype = Uint8ClampedArray && Uint8ClampedArray.prototype;
+       var TypedArray$1 = Int8Array$3 && getPrototypeOf$1(Int8Array$3);
+       var TypedArrayPrototype$1 = Int8ArrayPrototype && getPrototypeOf$1(Int8ArrayPrototype);
+       var ObjectPrototype = Object.prototype;
+       var isPrototypeOf = ObjectPrototype.isPrototypeOf;
+
+       var TO_STRING_TAG = wellKnownSymbol$g('toStringTag');
+       var TYPED_ARRAY_TAG$1 = uid$1('TYPED_ARRAY_TAG');
+       // Fixing native typed arrays in Opera Presto crashes the browser, see #595
+       var NATIVE_ARRAY_BUFFER_VIEWS$3 = NATIVE_ARRAY_BUFFER && !!setPrototypeOf$4 && classof$8(global$p.opera) !== 'Opera';
+       var TYPED_ARRAY_TAG_REQIRED = false;
+       var NAME$1;
+
+       var TypedArrayConstructorsList = {
+         Int8Array: 1,
+         Uint8Array: 1,
+         Uint8ClampedArray: 1,
+         Int16Array: 2,
+         Uint16Array: 2,
+         Int32Array: 4,
+         Uint32Array: 4,
+         Float32Array: 4,
+         Float64Array: 8
+       };
+
+       var BigIntArrayConstructorsList = {
+         BigInt64Array: 8,
+         BigUint64Array: 8
+       };
+
+       var isView = function isView(it) {
+         if (!isObject$i(it)) return false;
+         var klass = classof$8(it);
+         return klass === 'DataView'
+           || has$6(TypedArrayConstructorsList, klass)
+           || has$6(BigIntArrayConstructorsList, klass);
+       };
+
+       var isTypedArray$1 = function (it) {
+         if (!isObject$i(it)) return false;
+         var klass = classof$8(it);
+         return has$6(TypedArrayConstructorsList, klass)
+           || has$6(BigIntArrayConstructorsList, klass);
+       };
+
+       var aTypedArray$m = function (it) {
+         if (isTypedArray$1(it)) return it;
+         throw TypeError('Target is not a typed array');
+       };
+
+       var aTypedArrayConstructor$5 = function (C) {
+         if (setPrototypeOf$4) {
+           if (isPrototypeOf.call(TypedArray$1, C)) return C;
+         } else for (var ARRAY in TypedArrayConstructorsList) if (has$6(TypedArrayConstructorsList, NAME$1)) {
+           var TypedArrayConstructor = global$p[ARRAY];
+           if (TypedArrayConstructor && (C === TypedArrayConstructor || isPrototypeOf.call(TypedArrayConstructor, C))) {
+             return C;
+           }
+         } throw TypeError('Target is not a typed array constructor');
+       };
+
+       var exportTypedArrayMethod$n = function (KEY, property, forced) {
+         if (!DESCRIPTORS$e) return;
+         if (forced) for (var ARRAY in TypedArrayConstructorsList) {
+           var TypedArrayConstructor = global$p[ARRAY];
+           if (TypedArrayConstructor && has$6(TypedArrayConstructor.prototype, KEY)) try {
+             delete TypedArrayConstructor.prototype[KEY];
+           } catch (error) { /* empty */ }
+         }
+         if (!TypedArrayPrototype$1[KEY] || forced) {
+           redefine$9(TypedArrayPrototype$1, KEY, forced ? property
+             : NATIVE_ARRAY_BUFFER_VIEWS$3 && Int8ArrayPrototype[KEY] || property);
+         }
+       };
+
+       var exportTypedArrayStaticMethod$1 = function (KEY, property, forced) {
+         var ARRAY, TypedArrayConstructor;
+         if (!DESCRIPTORS$e) return;
+         if (setPrototypeOf$4) {
+           if (forced) for (ARRAY in TypedArrayConstructorsList) {
+             TypedArrayConstructor = global$p[ARRAY];
+             if (TypedArrayConstructor && has$6(TypedArrayConstructor, KEY)) try {
+               delete TypedArrayConstructor[KEY];
+             } catch (error) { /* empty */ }
+           }
+           if (!TypedArray$1[KEY] || forced) {
+             // V8 ~ Chrome 49-50 `%TypedArray%` methods are non-writable non-configurable
+             try {
+               return redefine$9(TypedArray$1, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS$3 && TypedArray$1[KEY] || property);
+             } catch (error) { /* empty */ }
+           } else return;
+         }
+         for (ARRAY in TypedArrayConstructorsList) {
+           TypedArrayConstructor = global$p[ARRAY];
+           if (TypedArrayConstructor && (!TypedArrayConstructor[KEY] || forced)) {
+             redefine$9(TypedArrayConstructor, KEY, property);
+           }
+         }

        };
 
        };
 

-       var shim$9 = function shimFindIndex() {
-               var polyfill = polyfill$6();
+       for (NAME$1 in TypedArrayConstructorsList) {
+         if (!global$p[NAME$1]) NATIVE_ARRAY_BUFFER_VIEWS$3 = false;
+       }

 
 

-               defineProperties_1(Array.prototype, { findIndex: polyfill }, {
-                       findIndex: function () {
-                               return Array.prototype.findIndex !== polyfill;
-                       }
-               });
+       // WebKit bug - typed arrays constructors prototype is Object.prototype
+       if (!NATIVE_ARRAY_BUFFER_VIEWS$3 || typeof TypedArray$1 != 'function' || TypedArray$1 === Function.prototype) {
+         // eslint-disable-next-line no-shadow -- safe
+         TypedArray$1 = function TypedArray() {
+           throw TypeError('Incorrect invocation');
+         };
+         if (NATIVE_ARRAY_BUFFER_VIEWS$3) for (NAME$1 in TypedArrayConstructorsList) {
+           if (global$p[NAME$1]) setPrototypeOf$4(global$p[NAME$1], TypedArray$1);
+         }
+       }

 
 

-               return polyfill;
-       };
+       if (!NATIVE_ARRAY_BUFFER_VIEWS$3 || !TypedArrayPrototype$1 || TypedArrayPrototype$1 === ObjectPrototype) {
+         TypedArrayPrototype$1 = TypedArray$1.prototype;
+         if (NATIVE_ARRAY_BUFFER_VIEWS$3) for (NAME$1 in TypedArrayConstructorsList) {
+           if (global$p[NAME$1]) setPrototypeOf$4(global$p[NAME$1].prototype, TypedArrayPrototype$1);
+         }
+       }

 
 

-       var slice$3 = Array.prototype.slice;
+       // WebKit bug - one more object in Uint8ClampedArray prototype chain
+       if (NATIVE_ARRAY_BUFFER_VIEWS$3 && getPrototypeOf$1(Uint8ClampedArrayPrototype) !== TypedArrayPrototype$1) {
+         setPrototypeOf$4(Uint8ClampedArrayPrototype, TypedArrayPrototype$1);
+       }

 
 

-       var polyfill$7 = polyfill$6();
+       if (DESCRIPTORS$e && !has$6(TypedArrayPrototype$1, TO_STRING_TAG)) {
+         TYPED_ARRAY_TAG_REQIRED = true;
+         defineProperty$6(TypedArrayPrototype$1, TO_STRING_TAG, { get: function () {
+           return isObject$i(this) ? this[TYPED_ARRAY_TAG$1] : undefined;
+         } });
+         for (NAME$1 in TypedArrayConstructorsList) if (global$p[NAME$1]) {
+           createNonEnumerableProperty$4(global$p[NAME$1], TYPED_ARRAY_TAG$1, NAME$1);
+         }
+       }

 
 

-       var boundShim = function findIndex(array, predicate) { // eslint-disable-line no-unused-vars
-               RequireObjectCoercible(array);
-               var args = slice$3.call(arguments, 1);
-               return polyfill$7.apply(array, args);
+       var arrayBufferViewCore = {
+         NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS$3,
+         TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQIRED && TYPED_ARRAY_TAG$1,
+         aTypedArray: aTypedArray$m,
+         aTypedArrayConstructor: aTypedArrayConstructor$5,
+         exportTypedArrayMethod: exportTypedArrayMethod$n,
+         exportTypedArrayStaticMethod: exportTypedArrayStaticMethod$1,
+         isView: isView,
+         isTypedArray: isTypedArray$1,
+         TypedArray: TypedArray$1,
+         TypedArrayPrototype: TypedArrayPrototype$1

        };
 
        };
 

-       defineProperties_1(boundShim, {
-               getPolyfill: polyfill$6,
-               implementation: implementation$4,
-               shim: shim$9
+       var $$10 = _export;
+       var ArrayBufferViewCore$n = arrayBufferViewCore;
+
+       var NATIVE_ARRAY_BUFFER_VIEWS$2 = ArrayBufferViewCore$n.NATIVE_ARRAY_BUFFER_VIEWS;
+
+       // `ArrayBuffer.isView` method
+       // https://tc39.es/ecma262/#sec-arraybuffer.isview
+       $$10({ target: 'ArrayBuffer', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS$2 }, {
+         isView: ArrayBufferViewCore$n.isView

        });
 
        });
 

-       var array_prototype_findindex = boundShim;
+       var getBuiltIn$4 = getBuiltIn$9;
+       var definePropertyModule$2 = objectDefineProperty;
+       var wellKnownSymbol$f = wellKnownSymbol$s;
+       var DESCRIPTORS$d = descriptors;

 
 

-       var $apply$1 = GetIntrinsic('%Reflect.apply%', true) || callBound('%Function.prototype.apply%');
+       var SPECIES$4 = wellKnownSymbol$f('species');

 
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-call
+       var setSpecies$5 = function (CONSTRUCTOR_NAME) {
+         var Constructor = getBuiltIn$4(CONSTRUCTOR_NAME);
+         var defineProperty = definePropertyModule$2.f;

 
 

-       var Call = function Call(F, V) {
-               var args = arguments.length > 2 ? arguments[2] : [];
-               return $apply$1(F, V, args);
+         if (DESCRIPTORS$d && Constructor && !Constructor[SPECIES$4]) {
+           defineProperty(Constructor, SPECIES$4, {
+             configurable: true,
+             get: function () { return this; }
+           });
+         }

        };
 
        };
 

-       var $defineProperty = GetIntrinsic('%Object.defineProperty%', true);
-
-       if ($defineProperty) {
-               try {
-                       $defineProperty({}, 'a', { value: 1 });
-               } catch (e) {
-                       // IE 8 has a broken defineProperty
-                       $defineProperty = null;
-               }
-       }
-
-
-
-       var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable');
-
-       // eslint-disable-next-line max-params
-       var DefineOwnProperty = function DefineOwnProperty(IsDataDescriptor, SameValue, FromPropertyDescriptor, O, P, desc) {
-               if (!$defineProperty) {
-                       if (!IsDataDescriptor(desc)) {
-                               // ES3 does not support getters/setters
-                               return false;
-                       }
-                       if (!desc['[[Configurable]]'] || !desc['[[Writable]]']) {
-                               return false;
-                       }
-
-                       // fallback for ES3
-                       if (P in O && $isEnumerable(O, P) !== !!desc['[[Enumerable]]']) {
-                               // a non-enumerable existing property
-                               return false;
-                       }
-
-                       // property does not exist at all, or exists but is enumerable
-                       var V = desc['[[Value]]'];
-                       // eslint-disable-next-line no-param-reassign
-                       O[P] = V; // will use [[Define]]
-                       return SameValue(O[P], V);
-               }
-               $defineProperty(O, P, FromPropertyDescriptor(desc));
-               return true;
-       };
+       var $$$ = _export;
+       var global$o = global$F;
+       var arrayBufferModule = arrayBuffer;
+       var setSpecies$4 = setSpecies$5;

 
 

-       var src = functionBind.call(Function.call, Object.prototype.hasOwnProperty);
-
-       var $TypeError$3 = GetIntrinsic('%TypeError%');
-       var $SyntaxError = GetIntrinsic('%SyntaxError%');
-
-
-
-       var predicates = {
-               // https://ecma-international.org/ecma-262/6.0/#sec-property-descriptor-specification-type
-               'Property Descriptor': function isPropertyDescriptor(Type, Desc) {
-                       if (Type(Desc) !== 'Object') {
-                               return false;
-                       }
-                       var allowed = {
-                               '[[Configurable]]': true,
-                               '[[Enumerable]]': true,
-                               '[[Get]]': true,
-                               '[[Set]]': true,
-                               '[[Value]]': true,
-                               '[[Writable]]': true
-                       };
-
-                       for (var key in Desc) { // eslint-disable-line
-                               if (src(Desc, key) && !allowed[key]) {
-                                       return false;
-                               }
-                       }
-
-                       var isData = src(Desc, '[[Value]]');
-                       var IsAccessor = src(Desc, '[[Get]]') || src(Desc, '[[Set]]');
-                       if (isData && IsAccessor) {
-                               throw new $TypeError$3('Property Descriptors may not be both accessor and data descriptors');
-                       }
-                       return true;
-               }
-       };
+       var ARRAY_BUFFER = 'ArrayBuffer';
+       var ArrayBuffer$3 = arrayBufferModule[ARRAY_BUFFER];
+       var NativeArrayBuffer = global$o[ARRAY_BUFFER];

 
 

-       var assertRecord = function assertRecord(Type, recordType, argumentName, value) {
-               var predicate = predicates[recordType];
-               if (typeof predicate !== 'function') {
-                       throw new $SyntaxError('unknown record type: ' + recordType);
-               }
-               if (!predicate(Type, value)) {
-                       throw new $TypeError$3(argumentName + ' must be a ' + recordType);
-               }
-       };
+       // `ArrayBuffer` constructor
+       // https://tc39.es/ecma262/#sec-arraybuffer-constructor
+       $$$({ global: true, forced: NativeArrayBuffer !== ArrayBuffer$3 }, {
+         ArrayBuffer: ArrayBuffer$3
+       });

 
 

-       // https://www.ecma-international.org/ecma-262/5.1/#sec-8
-
-       var Type = function Type(x) {
-               if (x === null) {
-                       return 'Null';
-               }
-               if (typeof x === 'undefined') {
-                       return 'Undefined';
-               }
-               if (typeof x === 'function' || typeof x === 'object') {
-                       return 'Object';
-               }
-               if (typeof x === 'number') {
-                       return 'Number';
-               }
-               if (typeof x === 'boolean') {
-                       return 'Boolean';
-               }
-               if (typeof x === 'string') {
-                       return 'String';
-               }
-       };
+       setSpecies$4(ARRAY_BUFFER);

 
 

-       // https://ecma-international.org/ecma-262/6.0/#sec-ecmascript-data-types-and-values
+       var fails$C = fails$N;

 
 

-       var Type$1 = function Type$1(x) {
-               if (typeof x === 'symbol') {
-                       return 'Symbol';
-               }
-               return Type(x);
+       var arrayMethodIsStrict$8 = function (METHOD_NAME, argument) {
+         var method = [][METHOD_NAME];
+         return !!method && fails$C(function () {
+           // eslint-disable-next-line no-useless-call,no-throw-literal -- required for testing
+           method.call(null, argument || function () { throw 1; }, 1);
+         });

        };
 
        };
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-frompropertydescriptor
-
-       var FromPropertyDescriptor = function FromPropertyDescriptor(Desc) {
-               if (typeof Desc === 'undefined') {
-                       return Desc;
-               }
-
-               assertRecord(Type$1, 'Property Descriptor', 'Desc', Desc);
-
-               var obj = {};
-               if ('[[Value]]' in Desc) {
-                       obj.value = Desc['[[Value]]'];
-               }
-               if ('[[Writable]]' in Desc) {
-                       obj.writable = Desc['[[Writable]]'];
-               }
-               if ('[[Get]]' in Desc) {
-                       obj.get = Desc['[[Get]]'];
-               }
-               if ('[[Set]]' in Desc) {
-                       obj.set = Desc['[[Set]]'];
-               }
-               if ('[[Enumerable]]' in Desc) {
-                       obj.enumerable = Desc['[[Enumerable]]'];
-               }
-               if ('[[Configurable]]' in Desc) {
-                       obj.configurable = Desc['[[Configurable]]'];
-               }
-               return obj;
-       };
+       /* eslint-disable es/no-array-prototype-indexof -- required for testing */
+       var $$_ = _export;
+       var $indexOf$1 = arrayIncludes.indexOf;
+       var arrayMethodIsStrict$7 = arrayMethodIsStrict$8;

 
 

-       var $gOPD$1 = GetIntrinsic('%Object.getOwnPropertyDescriptor%');
-       if ($gOPD$1) {
-               try {
-                       $gOPD$1([], 'length');
-               } catch (e) {
-                       // IE 8 has a broken gOPD
-                       $gOPD$1 = null;
-               }
-       }
+       var nativeIndexOf = [].indexOf;

 
 

-       var getOwnPropertyDescriptor = $gOPD$1;
+       var NEGATIVE_ZERO$1 = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;
+       var STRICT_METHOD$7 = arrayMethodIsStrict$7('indexOf');

 
 

-       var $Array = GetIntrinsic('%Array%');
+       // `Array.prototype.indexOf` method
+       // https://tc39.es/ecma262/#sec-array.prototype.indexof
+       $$_({ target: 'Array', proto: true, forced: NEGATIVE_ZERO$1 || !STRICT_METHOD$7 }, {
+         indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
+           return NEGATIVE_ZERO$1
+             // convert -0 to +0
+             ? nativeIndexOf.apply(this, arguments) || 0
+             : $indexOf$1(this, searchElement, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });

 
 

-       // eslint-disable-next-line global-require
-       var toStr$6 = !$Array.isArray && callBound('Object.prototype.toString');
+       var fails$B = fails$N;
+       var wellKnownSymbol$e = wellKnownSymbol$s;
+       var V8_VERSION$2 = engineV8Version;

 
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-isarray
+       var SPECIES$3 = wellKnownSymbol$e('species');

 
 

-       var IsArray = $Array.isArray || function IsArray(argument) {
-               return toStr$6(argument) === '[object Array]';
+       var arrayMethodHasSpeciesSupport$5 = function (METHOD_NAME) {
+         // We can't use this feature detection in V8 since it causes
+         // deoptimization and serious performance degradation
+         // https://github.com/zloirock/core-js/issues/677
+         return V8_VERSION$2 >= 51 || !fails$B(function () {
+           var array = [];
+           var constructor = array.constructor = {};
+           constructor[SPECIES$3] = function () {
+             return { foo: 1 };
+           };
+           return array[METHOD_NAME](Boolean).foo !== 1;
+         });

        };
 
        };
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-ispropertykey
+       var $$Z = _export;
+       var $map$1 = arrayIteration.map;
+       var arrayMethodHasSpeciesSupport$4 = arrayMethodHasSpeciesSupport$5;

 
 

-       var IsPropertyKey = function IsPropertyKey(argument) {
-               return typeof argument === 'string' || typeof argument === 'symbol';
-       };
+       var HAS_SPECIES_SUPPORT$3 = arrayMethodHasSpeciesSupport$4('map');

 
 

-       var hasSymbols$4 = hasSymbols$1();
-       var hasToStringTag$2 = hasSymbols$4 && typeof Symbol.toStringTag === 'symbol';
-       var regexExec;
-       var isRegexMarker;
-       var badStringifier;
+       // `Array.prototype.map` method
+       // https://tc39.es/ecma262/#sec-array.prototype.map
+       // with adding support of @@species
+       $$Z({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$3 }, {
+         map: function map(callbackfn /* , thisArg */) {
+           return $map$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });

 
 

-       if (hasToStringTag$2) {
-               regexExec = Function.call.bind(RegExp.prototype.exec);
-               isRegexMarker = {};
+       var $forEach$1 = arrayIteration.forEach;
+       var arrayMethodIsStrict$6 = arrayMethodIsStrict$8;

 
 

-               var throwRegexMarker = function () {
-                       throw isRegexMarker;
-               };
-               badStringifier = {
-                       toString: throwRegexMarker,
-                       valueOf: throwRegexMarker
-               };
+       var STRICT_METHOD$6 = arrayMethodIsStrict$6('forEach');

 
 

-               if (typeof Symbol.toPrimitive === 'symbol') {
-                       badStringifier[Symbol.toPrimitive] = throwRegexMarker;
-               }
-       }
+       // `Array.prototype.forEach` method implementation
+       // https://tc39.es/ecma262/#sec-array.prototype.foreach
+       var arrayForEach = !STRICT_METHOD$6 ? function forEach(callbackfn /* , thisArg */) {
+         return $forEach$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       // eslint-disable-next-line es/no-array-prototype-foreach -- safe
+       } : [].forEach;

 
 

-       var toStr$7 = Object.prototype.toString;
-       var regexClass = '[object RegExp]';
+       var $$Y = _export;
+       var forEach$3 = arrayForEach;

 
 

-       var isRegex = hasToStringTag$2
-               // eslint-disable-next-line consistent-return
-               ? function isRegex(value) {
-                       if (!value || typeof value !== 'object') {
-                               return false;
-                       }
+       // `Array.prototype.forEach` method
+       // https://tc39.es/ecma262/#sec-array.prototype.foreach
+       // eslint-disable-next-line es/no-array-prototype-foreach -- safe
+       $$Y({ target: 'Array', proto: true, forced: [].forEach != forEach$3 }, {
+         forEach: forEach$3
+       });

 
 

-                       try {
-                               regexExec(value, badStringifier);
-                       } catch (e) {
-                               return e === isRegexMarker;
-                       }
-               }
-               : function isRegex(value) {
-                       // In older browsers, typeof regex incorrectly returns 'function'
-                       if (!value || (typeof value !== 'object' && typeof value !== 'function')) {
-                               return false;
-                       }
+       var global$n = global$F;
+       var DOMIterables = domIterables;
+       var forEach$2 = arrayForEach;
+       var createNonEnumerableProperty$3 = createNonEnumerableProperty$e;

 
 

-                       return toStr$7.call(value) === regexClass;
-               };
+       for (var COLLECTION_NAME in DOMIterables) {
+         var Collection = global$n[COLLECTION_NAME];
+         var CollectionPrototype = Collection && Collection.prototype;
+         // some Chrome versions have non-configurable methods on DOMTokenList
+         if (CollectionPrototype && CollectionPrototype.forEach !== forEach$2) try {
+           createNonEnumerableProperty$3(CollectionPrototype, 'forEach', forEach$2);
+         } catch (error) {
+           CollectionPrototype.forEach = forEach$2;
+         }
+       }

 
 

-       // http://www.ecma-international.org/ecma-262/5.1/#sec-9.2
+       var $$X = _export;
+       var isArray$3 = isArray$6;

 
 

-       var ToBoolean = function ToBoolean(value) { return !!value; };
+       // `Array.isArray` method
+       // https://tc39.es/ecma262/#sec-array.isarray
+       $$X({ target: 'Array', stat: true }, {
+         isArray: isArray$3
+       });

 
 

-       var $match = GetIntrinsic('%Symbol.match%', true);
+       var $$W = _export;
+       var fails$A = fails$N;
+       var getOwnPropertyNames$3 = objectGetOwnPropertyNamesExternal.f;

 
 

+       // eslint-disable-next-line es/no-object-getownpropertynames -- required for testing
+       var FAILS_ON_PRIMITIVES$4 = fails$A(function () { return !Object.getOwnPropertyNames(1); });

 
 

+       // `Object.getOwnPropertyNames` method
+       // https://tc39.es/ecma262/#sec-object.getownpropertynames
+       $$W({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$4 }, {
+         getOwnPropertyNames: getOwnPropertyNames$3
+       });

 
 

+       var global$m = global$F;

 
 

+       var nativePromiseConstructor = global$m.Promise;

 
 

-       // https://ecma-international.org/ecma-262/6.0/#sec-isregexp
+       var wellKnownSymbol$d = wellKnownSymbol$s;
+       var Iterators$1 = iterators;

 
 

-       var IsRegExp = function IsRegExp(argument) {
-               if (!argument || typeof argument !== 'object') {
-                       return false;
-               }
-               if ($match) {
-                       var isRegExp = argument[$match];
-                       if (typeof isRegExp !== 'undefined') {
-                               return ToBoolean(isRegExp);
-                       }
-               }
-               return isRegex(argument);
-       };
+       var ITERATOR$5 = wellKnownSymbol$d('iterator');
+       var ArrayPrototype = Array.prototype;

 
 

-       var $TypeError$4 = GetIntrinsic('%TypeError%');
-
-
-
-
-
-       // https://ecma-international.org/ecma-262/5.1/#sec-8.10.5
-
-       var ToPropertyDescriptor = function ToPropertyDescriptor(Obj) {
-               if (Type$1(Obj) !== 'Object') {
-                       throw new $TypeError$4('ToPropertyDescriptor requires an object');
-               }
-
-               var desc = {};
-               if (src(Obj, 'enumerable')) {
-                       desc['[[Enumerable]]'] = ToBoolean(Obj.enumerable);
-               }
-               if (src(Obj, 'configurable')) {
-                       desc['[[Configurable]]'] = ToBoolean(Obj.configurable);
-               }
-               if (src(Obj, 'value')) {
-                       desc['[[Value]]'] = Obj.value;
-               }
-               if (src(Obj, 'writable')) {
-                       desc['[[Writable]]'] = ToBoolean(Obj.writable);
-               }
-               if (src(Obj, 'get')) {
-                       var getter = Obj.get;
-                       if (typeof getter !== 'undefined' && !IsCallable(getter)) {
-                               throw new TypeError('getter must be a function');
-                       }
-                       desc['[[Get]]'] = getter;
-               }
-               if (src(Obj, 'set')) {
-                       var setter = Obj.set;
-                       if (typeof setter !== 'undefined' && !IsCallable(setter)) {
-                               throw new $TypeError$4('setter must be a function');
-                       }
-                       desc['[[Set]]'] = setter;
-               }
-
-               if ((src(desc, '[[Get]]') || src(desc, '[[Set]]')) && (src(desc, '[[Value]]') || src(desc, '[[Writable]]'))) {
-                       throw new $TypeError$4('Invalid property descriptor. Cannot both specify accessors and a value or writable attribute');
-               }
-               return desc;
+       // check on default Array iterator
+       var isArrayIteratorMethod$3 = function (it) {
+         return it !== undefined && (Iterators$1.Array === it || ArrayPrototype[ITERATOR$5] === it);

        };
 
        };
 

-       var $TypeError$5 = GetIntrinsic('%TypeError%');
-
+       var classof$7 = classof$b;
+       var Iterators = iterators;
+       var wellKnownSymbol$c = wellKnownSymbol$s;

 
 

+       var ITERATOR$4 = wellKnownSymbol$c('iterator');

 
 

-       var $isEnumerable$1 = callBound('Object.prototype.propertyIsEnumerable');
-
+       var getIteratorMethod$5 = function (it) {
+         if (it != undefined) return it[ITERATOR$4]
+           || it['@@iterator']
+           || Iterators[classof$7(it)];
+       };

 
 

+       var anObject$d = anObject$m;

 
 

+       var iteratorClose$2 = function (iterator) {
+         var returnMethod = iterator['return'];
+         if (returnMethod !== undefined) {
+           return anObject$d(returnMethod.call(iterator)).value;
+         }
+       };

 
 

+       var anObject$c = anObject$m;
+       var isArrayIteratorMethod$2 = isArrayIteratorMethod$3;
+       var toLength$j = toLength$q;
+       var bind$a = functionBindContext;
+       var getIteratorMethod$4 = getIteratorMethod$5;
+       var iteratorClose$1 = iteratorClose$2;

 
 

+       var Result = function (stopped, result) {
+         this.stopped = stopped;
+         this.result = result;
+       };

 
 

+       var iterate$3 = function (iterable, unboundFunction, options) {
+         var that = options && options.that;
+         var AS_ENTRIES = !!(options && options.AS_ENTRIES);
+         var IS_ITERATOR = !!(options && options.IS_ITERATOR);
+         var INTERRUPTED = !!(options && options.INTERRUPTED);
+         var fn = bind$a(unboundFunction, that, 1 + AS_ENTRIES + INTERRUPTED);
+         var iterator, iterFn, index, length, result, next, step;

 
 

+         var stop = function (condition) {
+           if (iterator) iteratorClose$1(iterator);
+           return new Result(true, condition);
+         };

 
 

+         var callFn = function (value) {
+           if (AS_ENTRIES) {
+             anObject$c(value);
+             return INTERRUPTED ? fn(value[0], value[1], stop) : fn(value[0], value[1]);
+           } return INTERRUPTED ? fn(value, stop) : fn(value);
+         };

 
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-ordinarygetownproperty
+         if (IS_ITERATOR) {
+           iterator = iterable;
+         } else {
+           iterFn = getIteratorMethod$4(iterable);
+           if (typeof iterFn != 'function') throw TypeError('Target is not iterable');
+           // optimisation for array iterators
+           if (isArrayIteratorMethod$2(iterFn)) {
+             for (index = 0, length = toLength$j(iterable.length); length > index; index++) {
+               result = callFn(iterable[index]);
+               if (result && result instanceof Result) return result;
+             } return new Result(false);
+           }
+           iterator = iterFn.call(iterable);
+         }

 
 

-       var OrdinaryGetOwnProperty = function OrdinaryGetOwnProperty(O, P) {
-               if (Type$1(O) !== 'Object') {
-                       throw new $TypeError$5('Assertion failed: O must be an Object');
-               }
-               if (!IsPropertyKey(P)) {
-                       throw new $TypeError$5('Assertion failed: P must be a Property Key');
-               }
-               if (!src(O, P)) {
-                       return void 0;
-               }
-               if (!getOwnPropertyDescriptor) {
-                       // ES3 / IE 8 fallback
-                       var arrayLength = IsArray(O) && P === 'length';
-                       var regexLastIndex = IsRegExp(O) && P === 'lastIndex';
-                       return {
-                               '[[Configurable]]': !(arrayLength || regexLastIndex),
-                               '[[Enumerable]]': $isEnumerable$1(O, P),
-                               '[[Value]]': O[P],
-                               '[[Writable]]': true
-                       };
-               }
-               return ToPropertyDescriptor(getOwnPropertyDescriptor(O, P));
+         next = iterator.next;
+         while (!(step = next.call(iterator)).done) {
+           try {
+             result = callFn(step.value);
+           } catch (error) {
+             iteratorClose$1(iterator);
+             throw error;
+           }
+           if (typeof result == 'object' && result && result instanceof Result) return result;
+         } return new Result(false);

        };
 
        };
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-isdatadescriptor
+       var wellKnownSymbol$b = wellKnownSymbol$s;

 
 

-       var IsDataDescriptor = function IsDataDescriptor(Desc) {
-               if (typeof Desc === 'undefined') {
-                       return false;
-               }
+       var ITERATOR$3 = wellKnownSymbol$b('iterator');
+       var SAFE_CLOSING = false;

 
 

-               assertRecord(Type$1, 'Property Descriptor', 'Desc', Desc);
+       try {
+         var called = 0;
+         var iteratorWithReturn = {
+           next: function () {
+             return { done: !!called++ };
+           },
+           'return': function () {
+             SAFE_CLOSING = true;
+           }
+         };
+         iteratorWithReturn[ITERATOR$3] = function () {
+           return this;
+         };
+         // eslint-disable-next-line es/no-array-from, no-throw-literal -- required for testing
+         Array.from(iteratorWithReturn, function () { throw 2; });
+       } catch (error) { /* empty */ }

 
 

-               if (!src(Desc, '[[Value]]') && !src(Desc, '[[Writable]]')) {
-                       return false;
-               }
+       var checkCorrectnessOfIteration$4 = function (exec, SKIP_CLOSING) {
+         if (!SKIP_CLOSING && !SAFE_CLOSING) return false;
+         var ITERATION_SUPPORT = false;
+         try {
+           var object = {};
+           object[ITERATOR$3] = function () {
+             return {
+               next: function () {
+                 return { done: ITERATION_SUPPORT = true };
+               }
+             };
+           };
+           exec(object);
+         } catch (error) { /* empty */ }
+         return ITERATION_SUPPORT;
+       };
+
+       var userAgent$4 = engineUserAgent;
+
+       var engineIsIos = /(?:iphone|ipod|ipad).*applewebkit/i.test(userAgent$4);
+
+       var classof$6 = classofRaw$1;
+       var global$l = global$F;
+
+       var engineIsNode = classof$6(global$l.process) == 'process';
+
+       var global$k = global$F;
+       var fails$z = fails$N;
+       var bind$9 = functionBindContext;
+       var html = html$2;
+       var createElement = documentCreateElement$1;
+       var IS_IOS$1 = engineIsIos;
+       var IS_NODE$3 = engineIsNode;
+
+       var location$1 = global$k.location;
+       var set$2 = global$k.setImmediate;
+       var clear = global$k.clearImmediate;
+       var process$3 = global$k.process;
+       var MessageChannel = global$k.MessageChannel;
+       var Dispatch$1 = global$k.Dispatch;
+       var counter = 0;
+       var queue = {};
+       var ONREADYSTATECHANGE = 'onreadystatechange';
+       var defer, channel, port;
+
+       var run = function (id) {
+         // eslint-disable-next-line no-prototype-builtins -- safe
+         if (queue.hasOwnProperty(id)) {
+           var fn = queue[id];
+           delete queue[id];
+           fn();
+         }
+       };
+
+       var runner = function (id) {
+         return function () {
+           run(id);
+         };
+       };
+
+       var listener = function (event) {
+         run(event.data);
+       };
+
+       var post = function (id) {
+         // old engines have not location.origin
+         global$k.postMessage(id + '', location$1.protocol + '//' + location$1.host);
+       };
+
+       // Node.js 0.9+ & IE10+ has setImmediate, otherwise:
+       if (!set$2 || !clear) {
+         set$2 = function setImmediate(fn) {
+           var args = [];
+           var i = 1;
+           while (arguments.length > i) args.push(arguments[i++]);
+           queue[++counter] = function () {
+             // eslint-disable-next-line no-new-func -- spec requirement
+             (typeof fn == 'function' ? fn : Function(fn)).apply(undefined, args);
+           };
+           defer(counter);
+           return counter;
+         };
+         clear = function clearImmediate(id) {
+           delete queue[id];
+         };
+         // Node.js 0.8-
+         if (IS_NODE$3) {
+           defer = function (id) {
+             process$3.nextTick(runner(id));
+           };
+         // Sphere (JS game engine) Dispatch API
+         } else if (Dispatch$1 && Dispatch$1.now) {
+           defer = function (id) {
+             Dispatch$1.now(runner(id));
+           };
+         // Browsers with MessageChannel, includes WebWorkers
+         // except iOS - https://github.com/zloirock/core-js/issues/624
+         } else if (MessageChannel && !IS_IOS$1) {
+           channel = new MessageChannel();
+           port = channel.port2;
+           channel.port1.onmessage = listener;
+           defer = bind$9(port.postMessage, port, 1);
+         // Browsers with postMessage, skip WebWorkers
+         // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'
+         } else if (
+           global$k.addEventListener &&
+           typeof postMessage == 'function' &&
+           !global$k.importScripts &&
+           location$1 && location$1.protocol !== 'file:' &&
+           !fails$z(post)
+         ) {
+           defer = post;
+           global$k.addEventListener('message', listener, false);
+         // IE8-
+         } else if (ONREADYSTATECHANGE in createElement('script')) {
+           defer = function (id) {
+             html.appendChild(createElement('script'))[ONREADYSTATECHANGE] = function () {
+               html.removeChild(this);
+               run(id);
+             };
+           };
+         // Rest old browsers
+         } else {
+           defer = function (id) {
+             setTimeout(runner(id), 0);
+           };
+         }
+       }

 
 

-               return true;
+       var task$1 = {
+         set: set$2,
+         clear: clear

        };
 
        };
 

-       var $Object$1 = GetIntrinsic('%Object%');
-
+       var userAgent$3 = engineUserAgent;

 
 

+       var engineIsWebosWebkit = /web0s(?!.*chrome)/i.test(userAgent$3);

 
 

-       var $preventExtensions = $Object$1.preventExtensions;
-       var $isExtensible = $Object$1.isExtensible;
+       var global$j = global$F;
+       var getOwnPropertyDescriptor$3 = objectGetOwnPropertyDescriptor.f;
+       var macrotask = task$1.set;
+       var IS_IOS = engineIsIos;
+       var IS_WEBOS_WEBKIT = engineIsWebosWebkit;
+       var IS_NODE$2 = engineIsNode;

 
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-isextensible-o
+       var MutationObserver = global$j.MutationObserver || global$j.WebKitMutationObserver;
+       var document$2 = global$j.document;
+       var process$2 = global$j.process;
+       var Promise$1 = global$j.Promise;
+       // Node.js 11 shows ExperimentalWarning on getting `queueMicrotask`
+       var queueMicrotaskDescriptor = getOwnPropertyDescriptor$3(global$j, 'queueMicrotask');
+       var queueMicrotask = queueMicrotaskDescriptor && queueMicrotaskDescriptor.value;

 
 

-       var IsExtensible = $preventExtensions
-               ? function IsExtensible(obj) {
-                       return !isPrimitive(obj) && $isExtensible(obj);
-               }
-               : function IsExtensible(obj) {
-                       return !isPrimitive(obj);
-               };
+       var flush, head, last, notify$1, toggle, node, promise, then;

 
 

-       // http://www.ecma-international.org/ecma-262/5.1/#sec-9.12
+       // modern engines have queueMicrotask method
+       if (!queueMicrotask) {
+         flush = function () {
+           var parent, fn;
+           if (IS_NODE$2 && (parent = process$2.domain)) parent.exit();
+           while (head) {
+             fn = head.fn;
+             head = head.next;
+             try {
+               fn();
+             } catch (error) {
+               if (head) notify$1();
+               else last = undefined;
+               throw error;
+             }
+           } last = undefined;
+           if (parent) parent.enter();
+         };
+
+         // browsers with MutationObserver, except iOS - https://github.com/zloirock/core-js/issues/339
+         // also except WebOS Webkit https://github.com/zloirock/core-js/issues/898
+         if (!IS_IOS && !IS_NODE$2 && !IS_WEBOS_WEBKIT && MutationObserver && document$2) {
+           toggle = true;
+           node = document$2.createTextNode('');
+           new MutationObserver(flush).observe(node, { characterData: true });
+           notify$1 = function () {
+             node.data = toggle = !toggle;
+           };
+         // environments with maybe non-completely correct, but existent Promise
+         } else if (Promise$1 && Promise$1.resolve) {
+           // Promise.resolve without an argument throws an error in LG WebOS 2
+           promise = Promise$1.resolve(undefined);
+           // workaround of WebKit ~ iOS Safari 10.1 bug
+           promise.constructor = Promise$1;
+           then = promise.then;
+           notify$1 = function () {
+             then.call(promise, flush);
+           };
+         // Node.js without promises
+         } else if (IS_NODE$2) {
+           notify$1 = function () {
+             process$2.nextTick(flush);
+           };
+         // for other environments - macrotask based on:
+         // - setImmediate
+         // - MessageChannel
+         // - window.postMessag
+         // - onreadystatechange
+         // - setTimeout
+         } else {
+           notify$1 = function () {
+             // strange IE + webpack dev server bug - use .call(global)
+             macrotask.call(global$j, flush);
+           };
+         }
+       }

 
 

-       var SameValue = function SameValue(x, y) {
-               if (x === y) { // 0 === -0, but they are not identical.
-                       if (x === 0) { return 1 / x === 1 / y; }
-                       return true;
-               }
-               return _isNaN(x) && _isNaN(y);
+       var microtask$1 = queueMicrotask || function (fn) {
+         var task = { fn: fn, next: undefined };
+         if (last) last.next = task;
+         if (!head) {
+           head = task;
+           notify$1();
+         } last = task;

        };
 
        };
 

-       var $TypeError$6 = GetIntrinsic('%TypeError%');
-
+       var newPromiseCapability$2 = {};

 
 

+       var aFunction$6 = aFunction$9;

 
 

+       var PromiseCapability = function (C) {
+         var resolve, reject;
+         this.promise = new C(function ($$resolve, $$reject) {
+           if (resolve !== undefined || reject !== undefined) throw TypeError('Bad Promise constructor');
+           resolve = $$resolve;
+           reject = $$reject;
+         });
+         this.resolve = aFunction$6(resolve);
+         this.reject = aFunction$6(reject);
+       };

 
 

+       // `NewPromiseCapability` abstract operation
+       // https://tc39.es/ecma262/#sec-newpromisecapability
+       newPromiseCapability$2.f = function (C) {
+         return new PromiseCapability(C);
+       };

 
 

+       var anObject$b = anObject$m;
+       var isObject$h = isObject$r;
+       var newPromiseCapability$1 = newPromiseCapability$2;

 
 

+       var promiseResolve$2 = function (C, x) {
+         anObject$b(C);
+         if (isObject$h(x) && x.constructor === C) return x;
+         var promiseCapability = newPromiseCapability$1.f(C);
+         var resolve = promiseCapability.resolve;
+         resolve(x);
+         return promiseCapability.promise;
+       };

 
 

+       var global$i = global$F;

 
 

+       var hostReportErrors$1 = function (a, b) {
+         var console = global$i.console;
+         if (console && console.error) {
+           arguments.length === 1 ? console.error(a) : console.error(a, b);
+         }
+       };

 
 

+       var perform$1 = function (exec) {
+         try {
+           return { error: false, value: exec() };
+         } catch (error) {
+           return { error: true, value: error };
+         }
+       };
+
+       var engineIsBrowser = typeof window == 'object';
+
+       var $$V = _export;
+       var global$h = global$F;
+       var getBuiltIn$3 = getBuiltIn$9;
+       var NativePromise$1 = nativePromiseConstructor;
+       var redefine$8 = redefine$g.exports;
+       var redefineAll$2 = redefineAll$4;
+       var setPrototypeOf$3 = objectSetPrototypeOf;
+       var setToStringTag$5 = setToStringTag$a;
+       var setSpecies$3 = setSpecies$5;
+       var isObject$g = isObject$r;
+       var aFunction$5 = aFunction$9;
+       var anInstance$5 = anInstance$7;
+       var inspectSource = inspectSource$3;
+       var iterate$2 = iterate$3;
+       var checkCorrectnessOfIteration$3 = checkCorrectnessOfIteration$4;
+       var speciesConstructor$6 = speciesConstructor$8;
+       var task = task$1.set;
+       var microtask = microtask$1;
+       var promiseResolve$1 = promiseResolve$2;
+       var hostReportErrors = hostReportErrors$1;
+       var newPromiseCapabilityModule = newPromiseCapability$2;
+       var perform = perform$1;
+       var InternalStateModule$4 = internalState;
+       var isForced$3 = isForced_1;
+       var wellKnownSymbol$a = wellKnownSymbol$s;
+       var IS_BROWSER = engineIsBrowser;
+       var IS_NODE$1 = engineIsNode;
+       var V8_VERSION$1 = engineV8Version;
+
+       var SPECIES$2 = wellKnownSymbol$a('species');
+       var PROMISE = 'Promise';
+       var getInternalState$2 = InternalStateModule$4.get;
+       var setInternalState$4 = InternalStateModule$4.set;
+       var getInternalPromiseState = InternalStateModule$4.getterFor(PROMISE);
+       var NativePromisePrototype = NativePromise$1 && NativePromise$1.prototype;
+       var PromiseConstructor = NativePromise$1;
+       var PromiseConstructorPrototype = NativePromisePrototype;
+       var TypeError$1 = global$h.TypeError;
+       var document$1 = global$h.document;
+       var process$1 = global$h.process;
+       var newPromiseCapability = newPromiseCapabilityModule.f;
+       var newGenericPromiseCapability = newPromiseCapability;
+       var DISPATCH_EVENT = !!(document$1 && document$1.createEvent && global$h.dispatchEvent);
+       var NATIVE_REJECTION_EVENT = typeof PromiseRejectionEvent == 'function';
+       var UNHANDLED_REJECTION = 'unhandledrejection';
+       var REJECTION_HANDLED = 'rejectionhandled';
+       var PENDING = 0;
+       var FULFILLED = 1;
+       var REJECTED = 2;
+       var HANDLED = 1;
+       var UNHANDLED = 2;
+       var SUBCLASSING = false;
+       var Internal, OwnPromiseCapability, PromiseWrapper, nativeThen;
+
+       var FORCED$f = isForced$3(PROMISE, function () {
+         var GLOBAL_CORE_JS_PROMISE = inspectSource(PromiseConstructor) !== String(PromiseConstructor);
+         // V8 6.6 (Node 10 and Chrome 66) have a bug with resolving custom thenables
+         // https://bugs.chromium.org/p/chromium/issues/detail?id=830565
+         // We can't detect it synchronously, so just check versions
+         if (!GLOBAL_CORE_JS_PROMISE && V8_VERSION$1 === 66) return true;
+         // We can't use @@species feature detection in V8 since it causes
+         // deoptimization and performance degradation
+         // https://github.com/zloirock/core-js/issues/679
+         if (V8_VERSION$1 >= 51 && /native code/.test(PromiseConstructor)) return false;
+         // Detect correctness of subclassing with @@species support
+         var promise = new PromiseConstructor(function (resolve) { resolve(1); });
+         var FakePromise = function (exec) {
+           exec(function () { /* empty */ }, function () { /* empty */ });
+         };
+         var constructor = promise.constructor = {};
+         constructor[SPECIES$2] = FakePromise;
+         SUBCLASSING = promise.then(function () { /* empty */ }) instanceof FakePromise;
+         if (!SUBCLASSING) return true;
+         // Unhandled rejections tracking support, NodeJS Promise without it fails @@species test
+         return !GLOBAL_CORE_JS_PROMISE && IS_BROWSER && !NATIVE_REJECTION_EVENT;
+       });

 
 

+       var INCORRECT_ITERATION$1 = FORCED$f || !checkCorrectnessOfIteration$3(function (iterable) {
+         PromiseConstructor.all(iterable)['catch'](function () { /* empty */ });
+       });

 
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-createdataproperty
+       // helpers
+       var isThenable = function (it) {
+         var then;
+         return isObject$g(it) && typeof (then = it.then) == 'function' ? then : false;
+       };
+
+       var notify = function (state, isReject) {
+         if (state.notified) return;
+         state.notified = true;
+         var chain = state.reactions;
+         microtask(function () {
+           var value = state.value;
+           var ok = state.state == FULFILLED;
+           var index = 0;
+           // variable length - can't use forEach
+           while (chain.length > index) {
+             var reaction = chain[index++];
+             var handler = ok ? reaction.ok : reaction.fail;
+             var resolve = reaction.resolve;
+             var reject = reaction.reject;
+             var domain = reaction.domain;
+             var result, then, exited;
+             try {
+               if (handler) {
+                 if (!ok) {
+                   if (state.rejection === UNHANDLED) onHandleUnhandled(state);
+                   state.rejection = HANDLED;
+                 }
+                 if (handler === true) result = value;
+                 else {
+                   if (domain) domain.enter();
+                   result = handler(value); // can throw
+                   if (domain) {
+                     domain.exit();
+                     exited = true;
+                   }
+                 }
+                 if (result === reaction.promise) {
+                   reject(TypeError$1('Promise-chain cycle'));
+                 } else if (then = isThenable(result)) {
+                   then.call(result, resolve, reject);
+                 } else resolve(result);
+               } else reject(value);
+             } catch (error) {
+               if (domain && !exited) domain.exit();
+               reject(error);
+             }
+           }
+           state.reactions = [];
+           state.notified = false;
+           if (isReject && !state.rejection) onUnhandled(state);
+         });
+       };

 
 

-       var CreateDataProperty = function CreateDataProperty(O, P, V) {
-               if (Type$1(O) !== 'Object') {
-                       throw new $TypeError$6('Assertion failed: Type(O) is not Object');
-               }
-               if (!IsPropertyKey(P)) {
-                       throw new $TypeError$6('Assertion failed: IsPropertyKey(P) is not true');
-               }
-               var oldDesc = OrdinaryGetOwnProperty(O, P);
-               var extensible = !oldDesc || IsExtensible(O);
-               var immutable = oldDesc && (!oldDesc['[[Writable]]'] || !oldDesc['[[Configurable]]']);
-               if (immutable || !extensible) {
-                       return false;
-               }
-               return DefineOwnProperty(
-                       IsDataDescriptor,
-                       SameValue,
-                       FromPropertyDescriptor,
-                       O,
-                       P,
-                       {
-                               '[[Configurable]]': true,
-                               '[[Enumerable]]': true,
-                               '[[Value]]': V,
-                               '[[Writable]]': true
-                       }
-               );
+       var dispatchEvent$1 = function (name, promise, reason) {
+         var event, handler;
+         if (DISPATCH_EVENT) {
+           event = document$1.createEvent('Event');
+           event.promise = promise;
+           event.reason = reason;
+           event.initEvent(name, false, true);
+           global$h.dispatchEvent(event);
+         } else event = { promise: promise, reason: reason };
+         if (!NATIVE_REJECTION_EVENT && (handler = global$h['on' + name])) handler(event);
+         else if (name === UNHANDLED_REJECTION) hostReportErrors('Unhandled promise rejection', reason);
+       };
+
+       var onUnhandled = function (state) {
+         task.call(global$h, function () {
+           var promise = state.facade;
+           var value = state.value;
+           var IS_UNHANDLED = isUnhandled(state);
+           var result;
+           if (IS_UNHANDLED) {
+             result = perform(function () {
+               if (IS_NODE$1) {
+                 process$1.emit('unhandledRejection', value, promise);
+               } else dispatchEvent$1(UNHANDLED_REJECTION, promise, value);
+             });
+             // Browsers should not trigger `rejectionHandled` event if it was handled here, NodeJS - should
+             state.rejection = IS_NODE$1 || isUnhandled(state) ? UNHANDLED : HANDLED;
+             if (result.error) throw result.value;
+           }
+         });

        };
 
        };
 

-       var $TypeError$7 = GetIntrinsic('%TypeError%');
+       var isUnhandled = function (state) {
+         return state.rejection !== HANDLED && !state.parent;
+       };

 
 

+       var onHandleUnhandled = function (state) {
+         task.call(global$h, function () {
+           var promise = state.facade;
+           if (IS_NODE$1) {
+             process$1.emit('rejectionHandled', promise);
+           } else dispatchEvent$1(REJECTION_HANDLED, promise, state.value);
+         });
+       };

 
 

+       var bind$8 = function (fn, state, unwrap) {
+         return function (value) {
+           fn(state, value, unwrap);
+         };
+       };

 
 

+       var internalReject = function (state, value, unwrap) {
+         if (state.done) return;
+         state.done = true;
+         if (unwrap) state = unwrap;
+         state.value = value;
+         state.state = REJECTED;
+         notify(state, true);
+       };

 
 

+       var internalResolve = function (state, value, unwrap) {
+         if (state.done) return;
+         state.done = true;
+         if (unwrap) state = unwrap;
+         try {
+           if (state.facade === value) throw TypeError$1("Promise can't be resolved itself");
+           var then = isThenable(value);
+           if (then) {
+             microtask(function () {
+               var wrapper = { done: false };
+               try {
+                 then.call(value,
+                   bind$8(internalResolve, wrapper, state),
+                   bind$8(internalReject, wrapper, state)
+                 );
+               } catch (error) {
+                 internalReject(wrapper, error, state);
+               }
+             });
+           } else {
+             state.value = value;
+             state.state = FULFILLED;
+             notify(state, false);
+           }
+         } catch (error) {
+           internalReject({ done: false }, error, state);
+         }
+       };

 
 

-       // // https://ecma-international.org/ecma-262/6.0/#sec-createdatapropertyorthrow
+       // constructor polyfill
+       if (FORCED$f) {
+         // 25.4.3.1 Promise(executor)
+         PromiseConstructor = function Promise(executor) {
+           anInstance$5(this, PromiseConstructor, PROMISE);
+           aFunction$5(executor);
+           Internal.call(this);
+           var state = getInternalState$2(this);
+           try {
+             executor(bind$8(internalResolve, state), bind$8(internalReject, state));
+           } catch (error) {
+             internalReject(state, error);
+           }
+         };
+         PromiseConstructorPrototype = PromiseConstructor.prototype;
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         Internal = function Promise(executor) {
+           setInternalState$4(this, {
+             type: PROMISE,
+             done: false,
+             notified: false,
+             parent: false,
+             reactions: [],
+             rejection: false,
+             state: PENDING,
+             value: undefined
+           });
+         };
+         Internal.prototype = redefineAll$2(PromiseConstructorPrototype, {
+           // `Promise.prototype.then` method
+           // https://tc39.es/ecma262/#sec-promise.prototype.then
+           then: function then(onFulfilled, onRejected) {
+             var state = getInternalPromiseState(this);
+             var reaction = newPromiseCapability(speciesConstructor$6(this, PromiseConstructor));
+             reaction.ok = typeof onFulfilled == 'function' ? onFulfilled : true;
+             reaction.fail = typeof onRejected == 'function' && onRejected;
+             reaction.domain = IS_NODE$1 ? process$1.domain : undefined;
+             state.parent = true;
+             state.reactions.push(reaction);
+             if (state.state != PENDING) notify(state, false);
+             return reaction.promise;
+           },
+           // `Promise.prototype.catch` method
+           // https://tc39.es/ecma262/#sec-promise.prototype.catch
+           'catch': function (onRejected) {
+             return this.then(undefined, onRejected);
+           }
+         });
+         OwnPromiseCapability = function () {
+           var promise = new Internal();
+           var state = getInternalState$2(promise);
+           this.promise = promise;
+           this.resolve = bind$8(internalResolve, state);
+           this.reject = bind$8(internalReject, state);
+         };
+         newPromiseCapabilityModule.f = newPromiseCapability = function (C) {
+           return C === PromiseConstructor || C === PromiseWrapper
+             ? new OwnPromiseCapability(C)
+             : newGenericPromiseCapability(C);
+         };

 
 

-       var CreateDataPropertyOrThrow = function CreateDataPropertyOrThrow(O, P, V) {
-               if (Type$1(O) !== 'Object') {
-                       throw new $TypeError$7('Assertion failed: Type(O) is not Object');
-               }
-               if (!IsPropertyKey(P)) {
-                       throw new $TypeError$7('Assertion failed: IsPropertyKey(P) is not true');
-               }
-               var success = CreateDataProperty(O, P, V);
-               if (!success) {
-                       throw new $TypeError$7('unable to create data property');
-               }
-               return success;
-       };
+         if (typeof NativePromise$1 == 'function' && NativePromisePrototype !== Object.prototype) {
+           nativeThen = NativePromisePrototype.then;

 
 

-       var hasMap = typeof Map === 'function' && Map.prototype;
-       var mapSizeDescriptor = Object.getOwnPropertyDescriptor && hasMap ? Object.getOwnPropertyDescriptor(Map.prototype, 'size') : null;
-       var mapSize = hasMap && mapSizeDescriptor && typeof mapSizeDescriptor.get === 'function' ? mapSizeDescriptor.get : null;
-       var mapForEach = hasMap && Map.prototype.forEach;
-       var hasSet = typeof Set === 'function' && Set.prototype;
-       var setSizeDescriptor = Object.getOwnPropertyDescriptor && hasSet ? Object.getOwnPropertyDescriptor(Set.prototype, 'size') : null;
-       var setSize = hasSet && setSizeDescriptor && typeof setSizeDescriptor.get === 'function' ? setSizeDescriptor.get : null;
-       var setForEach = hasSet && Set.prototype.forEach;
-       var booleanValueOf = Boolean.prototype.valueOf;
-       var objectToString$1 = Object.prototype.toString;
+           if (!SUBCLASSING) {
+             // make `Promise#then` return a polyfilled `Promise` for native promise-based APIs
+             redefine$8(NativePromisePrototype, 'then', function then(onFulfilled, onRejected) {
+               var that = this;
+               return new PromiseConstructor(function (resolve, reject) {
+                 nativeThen.call(that, resolve, reject);
+               }).then(onFulfilled, onRejected);
+             // https://github.com/zloirock/core-js/issues/640
+             }, { unsafe: true });

 
 

-       var objectInspect = function inspect_ (obj, opts, depth, seen) {
-           if (typeof obj === 'undefined') {
-               return 'undefined';
-           }
-           if (obj === null) {
-               return 'null';
-           }
-           if (typeof obj === 'boolean') {
-               return obj ? 'true' : 'false';
-           }
-           if (typeof obj === 'string') {
-               return inspectString(obj);
-           }
-           if (typeof obj === 'number') {
-             if (obj === 0) {
-               return Infinity / obj > 0 ? '0' : '-0';
-             }
-             return String(obj);
+             // makes sure that native promise-based APIs `Promise#catch` properly works with patched `Promise#then`
+             redefine$8(NativePromisePrototype, 'catch', PromiseConstructorPrototype['catch'], { unsafe: true });

            }
 
            }
 

-           if (!opts) { opts = {}; }
+           // make `.constructor === Promise` work for native promise-based APIs
+           try {
+             delete NativePromisePrototype.constructor;
+           } catch (error) { /* empty */ }

 
 

-           var maxDepth = typeof opts.depth === 'undefined' ? 5 : opts.depth;
-           if (typeof depth === 'undefined') { depth = 0; }
-           if (depth >= maxDepth && maxDepth > 0 && typeof obj === 'object') {
-               return '[Object]';
+           // make `instanceof Promise` work for native promise-based APIs
+           if (setPrototypeOf$3) {
+             setPrototypeOf$3(NativePromisePrototype, PromiseConstructorPrototype);

            }
            }

+         }
+       }

 
 

-           if (typeof seen === 'undefined') { seen = []; }
-           else if (indexOf$2(seen, obj) >= 0) {
-               return '[Circular]';
-           }
+       $$V({ global: true, wrap: true, forced: FORCED$f }, {
+         Promise: PromiseConstructor
+       });

 
 

-           function inspect (value, from) {
-               if (from) {
-                   seen = seen.slice();
-                   seen.push(from);
-               }
-               return inspect_(value, opts, depth + 1, seen);
-           }
+       setToStringTag$5(PromiseConstructor, PROMISE, false);
+       setSpecies$3(PROMISE);

 
 

-           if (typeof obj === 'function') {
-               var name = nameOf(obj);
-               return '[Function' + (name ? ': ' + name : '') + ']';
-           }
-           if (isSymbol$3(obj)) {
-               var symString = Symbol.prototype.toString.call(obj);
-               return typeof obj === 'object' ? markBoxed(symString) : symString;
-           }
-           if (isElement(obj)) {
-               var s = '<' + String(obj.nodeName).toLowerCase();
-               var attrs = obj.attributes || [];
-               for (var i = 0; i < attrs.length; i++) {
-                   s += ' ' + attrs[i].name + '="' + quote(attrs[i].value) + '"';
-               }
-               s += '>';
-               if (obj.childNodes && obj.childNodes.length) { s += '...'; }
-               s += '</' + String(obj.nodeName).toLowerCase() + '>';
-               return s;
-           }
-           if (isArray$3(obj)) {
-               if (obj.length === 0) { return '[]'; }
-               return '[ ' + arrObjKeys(obj, inspect).join(', ') + ' ]';
-           }
-           if (isError(obj)) {
-               var parts = arrObjKeys(obj, inspect);
-               if (parts.length === 0) { return '[' + String(obj) + ']'; }
-               return '{ [' + String(obj) + '] ' + parts.join(', ') + ' }';
-           }
-           if (typeof obj === 'object' && typeof obj.inspect === 'function') {
-               return obj.inspect();
-           }
-           if (isMap(obj)) {
-               var parts = [];
-               mapForEach.call(obj, function (value, key) {
-                   parts.push(inspect(key, obj) + ' => ' + inspect(value, obj));
-               });
-               return collectionOf('Map', mapSize.call(obj), parts);
-           }
-           if (isSet(obj)) {
-               var parts = [];
-               setForEach.call(obj, function (value ) {
-                   parts.push(inspect(value, obj));
-               });
-               return collectionOf('Set', setSize.call(obj), parts);
-           }
-           if (isNumber(obj)) {
-               return markBoxed(Number(obj));
-           }
-           if (isBoolean(obj)) {
-               return markBoxed(booleanValueOf.call(obj));
-           }
-           if (isString$1(obj)) {
-               return markBoxed(inspect(String(obj)));
-           }
-           if (!isDate(obj) && !isRegExp(obj)) {
-               var xs = arrObjKeys(obj, inspect);
-               if (xs.length === 0) { return '{}'; }
-               return '{ ' + xs.join(', ') + ' }';
-           }
-           return String(obj);
-       };
+       PromiseWrapper = getBuiltIn$3(PROMISE);

 
 

-       function quote (s) {
-           return String(s).replace(/"/g, '&quot;');
-       }
+       // statics
+       $$V({ target: PROMISE, stat: true, forced: FORCED$f }, {
+         // `Promise.reject` method
+         // https://tc39.es/ecma262/#sec-promise.reject
+         reject: function reject(r) {
+           var capability = newPromiseCapability(this);
+           capability.reject.call(undefined, r);
+           return capability.promise;
+         }
+       });

 
 

-       function isArray$3 (obj) { return toStr$8(obj) === '[object Array]' }
-       function isDate (obj) { return toStr$8(obj) === '[object Date]' }
-       function isRegExp (obj) { return toStr$8(obj) === '[object RegExp]' }
-       function isError (obj) { return toStr$8(obj) === '[object Error]' }
-       function isSymbol$3 (obj) { return toStr$8(obj) === '[object Symbol]' }
-       function isString$1 (obj) { return toStr$8(obj) === '[object String]' }
-       function isNumber (obj) { return toStr$8(obj) === '[object Number]' }
-       function isBoolean (obj) { return toStr$8(obj) === '[object Boolean]' }
+       $$V({ target: PROMISE, stat: true, forced: FORCED$f }, {
+         // `Promise.resolve` method
+         // https://tc39.es/ecma262/#sec-promise.resolve
+         resolve: function resolve(x) {
+           return promiseResolve$1(this, x);
+         }
+       });

 
 

-       var hasOwn = Object.prototype.hasOwnProperty || function (key) { return key in this; };
-       function has$1 (obj, key) {
-           return hasOwn.call(obj, key);
-       }
+       $$V({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION$1 }, {
+         // `Promise.all` method
+         // https://tc39.es/ecma262/#sec-promise.all
+         all: function all(iterable) {
+           var C = this;
+           var capability = newPromiseCapability(C);
+           var resolve = capability.resolve;
+           var reject = capability.reject;
+           var result = perform(function () {
+             var $promiseResolve = aFunction$5(C.resolve);
+             var values = [];
+             var counter = 0;
+             var remaining = 1;
+             iterate$2(iterable, function (promise) {
+               var index = counter++;
+               var alreadyCalled = false;
+               values.push(undefined);
+               remaining++;
+               $promiseResolve.call(C, promise).then(function (value) {
+                 if (alreadyCalled) return;
+                 alreadyCalled = true;
+                 values[index] = value;
+                 --remaining || resolve(values);
+               }, reject);
+             });
+             --remaining || resolve(values);
+           });
+           if (result.error) reject(result.value);
+           return capability.promise;
+         },
+         // `Promise.race` method
+         // https://tc39.es/ecma262/#sec-promise.race
+         race: function race(iterable) {
+           var C = this;
+           var capability = newPromiseCapability(C);
+           var reject = capability.reject;
+           var result = perform(function () {
+             var $promiseResolve = aFunction$5(C.resolve);
+             iterate$2(iterable, function (promise) {
+               $promiseResolve.call(C, promise).then(capability.resolve, reject);
+             });
+           });
+           if (result.error) reject(result.value);
+           return capability.promise;
+         }
+       });

 
 

-       function toStr$8 (obj) {
-           return objectToString$1.call(obj);
-       }
+       var typedArrayConstructor = {exports: {}};
+
+       /* eslint-disable no-new -- required for testing */
+
+       var global$g = global$F;
+       var fails$y = fails$N;
+       var checkCorrectnessOfIteration$2 = checkCorrectnessOfIteration$4;
+       var NATIVE_ARRAY_BUFFER_VIEWS$1 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
+
+       var ArrayBuffer$2 = global$g.ArrayBuffer;
+       var Int8Array$2 = global$g.Int8Array;
+
+       var typedArrayConstructorsRequireWrappers = !NATIVE_ARRAY_BUFFER_VIEWS$1 || !fails$y(function () {
+         Int8Array$2(1);
+       }) || !fails$y(function () {
+         new Int8Array$2(-1);
+       }) || !checkCorrectnessOfIteration$2(function (iterable) {
+         new Int8Array$2();
+         new Int8Array$2(null);
+         new Int8Array$2(1.5);
+         new Int8Array$2(iterable);
+       }, true) || fails$y(function () {
+         // Safari (11+) bug - a reason why even Safari 13 should load a typed array polyfill
+         return new Int8Array$2(new ArrayBuffer$2(2), 1, undefined).length !== 1;
+       });

 
 

-       function nameOf (f) {
-           if (f.name) { return f.name; }
-           var m = String(f).match(/^function\s*([\w$]+)/);
-           if (m) { return m[1]; }
-       }
+       var toInteger$5 = toInteger$b;

 
 

-       function indexOf$2 (xs, x) {
-           if (xs.indexOf) { return xs.indexOf(x); }
-           for (var i = 0, l = xs.length; i < l; i++) {
-               if (xs[i] === x) { return i; }
-           }
-           return -1;
-       }
+       var toPositiveInteger$1 = function (it) {
+         var result = toInteger$5(it);
+         if (result < 0) throw RangeError("The argument can't be less than 0");
+         return result;
+       };

 
 

-       function isMap (x) {
-           if (!mapSize) {
-               return false;
-           }
-           try {
-               mapSize.call(x);
-               try {
-                   setSize.call(x);
-               } catch (s) {
-                   return true;
-               }
-               return x instanceof Map; // core-js workaround, pre-v2.5.0
-           } catch (e) {}
-           return false;
-       }
+       var toPositiveInteger = toPositiveInteger$1;

 
 

-       function isSet (x) {
-           if (!setSize) {
-               return false;
-           }
-           try {
-               setSize.call(x);
-               try {
-                   mapSize.call(x);
-               } catch (m) {
-                   return true;
-               }
-               return x instanceof Set; // core-js workaround, pre-v2.5.0
-           } catch (e) {}
-           return false;
-       }
+       var toOffset$2 = function (it, BYTES) {
+         var offset = toPositiveInteger(it);
+         if (offset % BYTES) throw RangeError('Wrong offset');
+         return offset;
+       };

 
 

-       function isElement (x) {
-           if (!x || typeof x !== 'object') { return false; }
-           if (typeof HTMLElement !== 'undefined' && x instanceof HTMLElement) {
-               return true;
+       var toObject$c = toObject$i;
+       var toLength$i = toLength$q;
+       var getIteratorMethod$3 = getIteratorMethod$5;
+       var isArrayIteratorMethod$1 = isArrayIteratorMethod$3;
+       var bind$7 = functionBindContext;
+       var aTypedArrayConstructor$4 = arrayBufferViewCore.aTypedArrayConstructor;
+
+       var typedArrayFrom$2 = function from(source /* , mapfn, thisArg */) {
+         var O = toObject$c(source);
+         var argumentsLength = arguments.length;
+         var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
+         var mapping = mapfn !== undefined;
+         var iteratorMethod = getIteratorMethod$3(O);
+         var i, length, result, step, iterator, next;
+         if (iteratorMethod != undefined && !isArrayIteratorMethod$1(iteratorMethod)) {
+           iterator = iteratorMethod.call(O);
+           next = iterator.next;
+           O = [];
+           while (!(step = next.call(iterator)).done) {
+             O.push(step.value);

            }
            }

-           return typeof x.nodeName === 'string'
-               && typeof x.getAttribute === 'function'
-           ;
-       }
+         }
+         if (mapping && argumentsLength > 2) {
+           mapfn = bind$7(mapfn, arguments[2], 2);
+         }
+         length = toLength$i(O.length);
+         result = new (aTypedArrayConstructor$4(this))(length);
+         for (i = 0; length > i; i++) {
+           result[i] = mapping ? mapfn(O[i], i) : O[i];
+         }
+         return result;
+       };

 
 

-       function inspectString (str) {
-           var s = str.replace(/(['\\])/g, '\\$1').replace(/[\x00-\x1f]/g, lowbyte);
-           return "'" + s + "'";
-       }
+       var isObject$f = isObject$r;
+       var setPrototypeOf$2 = objectSetPrototypeOf;
+
+       // makes subclassing work correct for wrapped built-ins
+       var inheritIfRequired$4 = function ($this, dummy, Wrapper) {
+         var NewTarget, NewTargetPrototype;
+         if (
+           // it can work only with native `setPrototypeOf`
+           setPrototypeOf$2 &&
+           // we haven't completely correct pre-ES6 way for getting `new.target`, so use this
+           typeof (NewTarget = dummy.constructor) == 'function' &&
+           NewTarget !== Wrapper &&
+           isObject$f(NewTargetPrototype = NewTarget.prototype) &&
+           NewTargetPrototype !== Wrapper.prototype
+         ) setPrototypeOf$2($this, NewTargetPrototype);
+         return $this;
+       };
+
+       var $$U = _export;
+       var global$f = global$F;
+       var DESCRIPTORS$c = descriptors;
+       var TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS$1 = typedArrayConstructorsRequireWrappers;
+       var ArrayBufferViewCore$m = arrayBufferViewCore;
+       var ArrayBufferModule = arrayBuffer;
+       var anInstance$4 = anInstance$7;
+       var createPropertyDescriptor$2 = createPropertyDescriptor$7;
+       var createNonEnumerableProperty$2 = createNonEnumerableProperty$e;
+       var toLength$h = toLength$q;
+       var toIndex = toIndex$2;
+       var toOffset$1 = toOffset$2;
+       var toPrimitive$3 = toPrimitive$7;
+       var has$5 = has$j;
+       var classof$5 = classof$b;
+       var isObject$e = isObject$r;
+       var create$9 = objectCreate;
+       var setPrototypeOf$1 = objectSetPrototypeOf;
+       var getOwnPropertyNames$2 = objectGetOwnPropertyNames.f;
+       var typedArrayFrom$1 = typedArrayFrom$2;
+       var forEach$1 = arrayIteration.forEach;
+       var setSpecies$2 = setSpecies$5;
+       var definePropertyModule$1 = objectDefineProperty;
+       var getOwnPropertyDescriptorModule$1 = objectGetOwnPropertyDescriptor;
+       var InternalStateModule$3 = internalState;
+       var inheritIfRequired$3 = inheritIfRequired$4;
+
+       var getInternalState$1 = InternalStateModule$3.get;
+       var setInternalState$3 = InternalStateModule$3.set;
+       var nativeDefineProperty = definePropertyModule$1.f;
+       var nativeGetOwnPropertyDescriptor$1 = getOwnPropertyDescriptorModule$1.f;
+       var round = Math.round;
+       var RangeError$1 = global$f.RangeError;
+       var ArrayBuffer$1 = ArrayBufferModule.ArrayBuffer;
+       var DataView$1 = ArrayBufferModule.DataView;
+       var NATIVE_ARRAY_BUFFER_VIEWS = ArrayBufferViewCore$m.NATIVE_ARRAY_BUFFER_VIEWS;
+       var TYPED_ARRAY_TAG = ArrayBufferViewCore$m.TYPED_ARRAY_TAG;
+       var TypedArray = ArrayBufferViewCore$m.TypedArray;
+       var TypedArrayPrototype = ArrayBufferViewCore$m.TypedArrayPrototype;
+       var aTypedArrayConstructor$3 = ArrayBufferViewCore$m.aTypedArrayConstructor;
+       var isTypedArray = ArrayBufferViewCore$m.isTypedArray;
+       var BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';
+       var WRONG_LENGTH = 'Wrong length';
+
+       var fromList = function (C, list) {
+         var index = 0;
+         var length = list.length;
+         var result = new (aTypedArrayConstructor$3(C))(length);
+         while (length > index) result[index] = list[index++];
+         return result;
+       };

 
 

-       function lowbyte (c) {
-           var n = c.charCodeAt(0);
-           var x = { 8: 'b', 9: 't', 10: 'n', 12: 'f', 13: 'r' }[n];
-           if (x) { return '\\' + x; }
-           return '\\x' + (n < 0x10 ? '0' : '') + n.toString(16);
-       }
+       var addGetter = function (it, key) {
+         nativeDefineProperty(it, key, { get: function () {
+           return getInternalState$1(this)[key];
+         } });
+       };

 
 

-       function markBoxed (str) {
-           return 'Object(' + str + ')';
-       }
+       var isArrayBuffer = function (it) {
+         var klass;
+         return it instanceof ArrayBuffer$1 || (klass = classof$5(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
+       };

 
 

-       function collectionOf (type, size, entries) {
-           return type + ' (' + size + ') {' + entries.join(', ') + '}';
-       }
+       var isTypedArrayIndex = function (target, key) {
+         return isTypedArray(target)
+           && typeof key != 'symbol'
+           && key in target
+           && String(+key) == String(key);
+       };

 
 

-       function arrObjKeys (obj, inspect) {
-           var isArr = isArray$3(obj);
-           var xs = [];
-           if (isArr) {
-               xs.length = obj.length;
-               for (var i = 0; i < obj.length; i++) {
-                   xs[i] = has$1(obj, i) ? inspect(obj[i], obj) : '';
-               }
-           }
-           for (var key in obj) {
-               if (!has$1(obj, key)) { continue; }
-               if (isArr && String(Number(key)) === key && key < obj.length) { continue; }
-               if (/[^\w$]/.test(key)) {
-                   xs.push(inspect(key, obj) + ': ' + inspect(obj[key], obj));
-               } else {
-                   xs.push(key + ': ' + inspect(obj[key], obj));
-               }
-           }
-           return xs;
-       }
+       var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
+         return isTypedArrayIndex(target, key = toPrimitive$3(key, true))
+           ? createPropertyDescriptor$2(2, target[key])
+           : nativeGetOwnPropertyDescriptor$1(target, key);
+       };

 
 

-       var $TypeError$8 = GetIntrinsic('%TypeError%');
+       var wrappedDefineProperty = function defineProperty(target, key, descriptor) {
+         if (isTypedArrayIndex(target, key = toPrimitive$3(key, true))
+           && isObject$e(descriptor)
+           && has$5(descriptor, 'value')
+           && !has$5(descriptor, 'get')
+           && !has$5(descriptor, 'set')
+           // TODO: add validation descriptor w/o calling accessors
+           && !descriptor.configurable
+           && (!has$5(descriptor, 'writable') || descriptor.writable)
+           && (!has$5(descriptor, 'enumerable') || descriptor.enumerable)
+         ) {
+           target[key] = descriptor.value;
+           return target;
+         } return nativeDefineProperty(target, key, descriptor);
+       };

 
 

+       if (DESCRIPTORS$c) {
+         if (!NATIVE_ARRAY_BUFFER_VIEWS) {
+           getOwnPropertyDescriptorModule$1.f = wrappedGetOwnPropertyDescriptor;
+           definePropertyModule$1.f = wrappedDefineProperty;
+           addGetter(TypedArrayPrototype, 'buffer');
+           addGetter(TypedArrayPrototype, 'byteOffset');
+           addGetter(TypedArrayPrototype, 'byteLength');
+           addGetter(TypedArrayPrototype, 'length');
+         }

 
 

+         $$U({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
+           getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
+           defineProperty: wrappedDefineProperty
+         });

 
 

+         typedArrayConstructor.exports = function (TYPE, wrapper, CLAMPED) {
+           var BYTES = TYPE.match(/\d+$/)[0] / 8;
+           var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';
+           var GETTER = 'get' + TYPE;
+           var SETTER = 'set' + TYPE;
+           var NativeTypedArrayConstructor = global$f[CONSTRUCTOR_NAME];
+           var TypedArrayConstructor = NativeTypedArrayConstructor;
+           var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;
+           var exported = {};

 
 

+           var getter = function (that, index) {
+             var data = getInternalState$1(that);
+             return data.view[GETTER](index * BYTES + data.byteOffset, true);
+           };

 
 

+           var setter = function (that, index, value) {
+             var data = getInternalState$1(that);
+             if (CLAMPED) value = (value = round(value)) < 0 ? 0 : value > 0xFF ? 0xFF : value & 0xFF;
+             data.view[SETTER](index * BYTES + data.byteOffset, value, true);
+           };

 
 

-       /**
-        * 7.3.1 Get (O, P) - https://ecma-international.org/ecma-262/6.0/#sec-get-o-p
-        * 1. Assert: Type(O) is Object.
-        * 2. Assert: IsPropertyKey(P) is true.
-        * 3. Return O.[[Get]](P, O).
-        */
+           var addElement = function (that, index) {
+             nativeDefineProperty(that, index, {
+               get: function () {
+                 return getter(this, index);
+               },
+               set: function (value) {
+                 return setter(this, index, value);
+               },
+               enumerable: true
+             });
+           };

 
 

-       var Get = function Get(O, P) {
-               // 7.3.1.1
-               if (Type$1(O) !== 'Object') {
-                       throw new $TypeError$8('Assertion failed: Type(O) is not Object');
-               }
-               // 7.3.1.2
-               if (!IsPropertyKey(P)) {
-                       throw new $TypeError$8('Assertion failed: IsPropertyKey(P) is not true, got ' + objectInspect(P));
-               }
-               // 7.3.1.3
-               return O[P];
-       };
+           if (!NATIVE_ARRAY_BUFFER_VIEWS) {
+             TypedArrayConstructor = wrapper(function (that, data, offset, $length) {
+               anInstance$4(that, TypedArrayConstructor, CONSTRUCTOR_NAME);
+               var index = 0;
+               var byteOffset = 0;
+               var buffer, byteLength, length;
+               if (!isObject$e(data)) {
+                 length = toIndex(data);
+                 byteLength = length * BYTES;
+                 buffer = new ArrayBuffer$1(byteLength);
+               } else if (isArrayBuffer(data)) {
+                 buffer = data;
+                 byteOffset = toOffset$1(offset, BYTES);
+                 var $len = data.byteLength;
+                 if ($length === undefined) {
+                   if ($len % BYTES) throw RangeError$1(WRONG_LENGTH);
+                   byteLength = $len - byteOffset;
+                   if (byteLength < 0) throw RangeError$1(WRONG_LENGTH);
+                 } else {
+                   byteLength = toLength$h($length) * BYTES;
+                   if (byteLength + byteOffset > $len) throw RangeError$1(WRONG_LENGTH);
+                 }
+                 length = byteLength / BYTES;
+               } else if (isTypedArray(data)) {
+                 return fromList(TypedArrayConstructor, data);
+               } else {
+                 return typedArrayFrom$1.call(TypedArrayConstructor, data);
+               }
+               setInternalState$3(that, {
+                 buffer: buffer,
+                 byteOffset: byteOffset,
+                 byteLength: byteLength,
+                 length: length,
+                 view: new DataView$1(buffer)
+               });
+               while (index < length) addElement(that, index++);
+             });

 
 

-       var $TypeError$9 = GetIntrinsic('%TypeError%');
-
-       var isPropertyDescriptor = function IsPropertyDescriptor(ES, Desc) {
-               if (ES.Type(Desc) !== 'Object') {
-                       return false;
-               }
-               var allowed = {
-                       '[[Configurable]]': true,
-                       '[[Enumerable]]': true,
-                       '[[Get]]': true,
-                       '[[Set]]': true,
-                       '[[Value]]': true,
-                       '[[Writable]]': true
-               };
-
-               for (var key in Desc) { // eslint-disable-line no-restricted-syntax
-                       if (src(Desc, key) && !allowed[key]) {
-                               return false;
-                       }
-               }
-
-               if (ES.IsDataDescriptor(Desc) && ES.IsAccessorDescriptor(Desc)) {
-                       throw new $TypeError$9('Property Descriptors may not be both accessor and data descriptors');
-               }
-               return true;
-       };
+             if (setPrototypeOf$1) setPrototypeOf$1(TypedArrayConstructor, TypedArray);
+             TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = create$9(TypedArrayPrototype);
+           } else if (TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS$1) {
+             TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {
+               anInstance$4(dummy, TypedArrayConstructor, CONSTRUCTOR_NAME);
+               return inheritIfRequired$3(function () {
+                 if (!isObject$e(data)) return new NativeTypedArrayConstructor(toIndex(data));
+                 if (isArrayBuffer(data)) return $length !== undefined
+                   ? new NativeTypedArrayConstructor(data, toOffset$1(typedArrayOffset, BYTES), $length)
+                   : typedArrayOffset !== undefined
+                     ? new NativeTypedArrayConstructor(data, toOffset$1(typedArrayOffset, BYTES))
+                     : new NativeTypedArrayConstructor(data);
+                 if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);
+                 return typedArrayFrom$1.call(TypedArrayConstructor, data);
+               }(), dummy, TypedArrayConstructor);
+             });
+
+             if (setPrototypeOf$1) setPrototypeOf$1(TypedArrayConstructor, TypedArray);
+             forEach$1(getOwnPropertyNames$2(NativeTypedArrayConstructor), function (key) {
+               if (!(key in TypedArrayConstructor)) {
+                 createNonEnumerableProperty$2(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);
+               }
+             });
+             TypedArrayConstructor.prototype = TypedArrayConstructorPrototype;
+           }

 
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-isaccessordescriptor
+           if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {
+             createNonEnumerableProperty$2(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);
+           }

 
 

-       var IsAccessorDescriptor = function IsAccessorDescriptor(Desc) {
-               if (typeof Desc === 'undefined') {
-                       return false;
-               }
+           if (TYPED_ARRAY_TAG) {
+             createNonEnumerableProperty$2(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);
+           }

 
 

-               assertRecord(Type$1, 'Property Descriptor', 'Desc', Desc);
+           exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;

 
 

-               if (!src(Desc, '[[Get]]') && !src(Desc, '[[Set]]')) {
-                       return false;
-               }
+           $$U({
+             global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS
+           }, exported);

 
 

-               return true;
-       };
+           if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {
+             createNonEnumerableProperty$2(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);
+           }

 
 

-       var $TypeError$a = GetIntrinsic('%TypeError%');
+           if (!(BYTES_PER_ELEMENT in TypedArrayConstructorPrototype)) {
+             createNonEnumerableProperty$2(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);
+           }

 
 

+           setSpecies$2(CONSTRUCTOR_NAME);
+         };
+       } else typedArrayConstructor.exports = function () { /* empty */ };

 
 

+       var createTypedArrayConstructor$1 = typedArrayConstructor.exports;

 
 

+       // `Uint8Array` constructor
+       // https://tc39.es/ecma262/#sec-typedarray-objects
+       createTypedArrayConstructor$1('Uint8', function (init) {
+         return function Uint8Array(data, byteOffset, length) {
+           return init(this, data, byteOffset, length);
+         };
+       });

 
 

+       var toObject$b = toObject$i;
+       var toAbsoluteIndex$4 = toAbsoluteIndex$8;
+       var toLength$g = toLength$q;
+
+       var min$7 = Math.min;
+
+       // `Array.prototype.copyWithin` method implementation
+       // https://tc39.es/ecma262/#sec-array.prototype.copywithin
+       // eslint-disable-next-line es/no-array-prototype-copywithin -- safe
+       var arrayCopyWithin = [].copyWithin || function copyWithin(target /* = 0 */, start /* = 0, end = @length */) {
+         var O = toObject$b(this);
+         var len = toLength$g(O.length);
+         var to = toAbsoluteIndex$4(target, len);
+         var from = toAbsoluteIndex$4(start, len);
+         var end = arguments.length > 2 ? arguments[2] : undefined;
+         var count = min$7((end === undefined ? len : toAbsoluteIndex$4(end, len)) - from, len - to);
+         var inc = 1;
+         if (from < to && to < from + count) {
+           inc = -1;
+           from += count - 1;
+           to += count - 1;
+         }
+         while (count-- > 0) {
+           if (from in O) O[to] = O[from];
+           else delete O[to];
+           to += inc;
+           from += inc;
+         } return O;
+       };
+
+       var ArrayBufferViewCore$l = arrayBufferViewCore;
+       var $copyWithin = arrayCopyWithin;
+
+       var aTypedArray$l = ArrayBufferViewCore$l.aTypedArray;
+       var exportTypedArrayMethod$m = ArrayBufferViewCore$l.exportTypedArrayMethod;
+
+       // `%TypedArray%.prototype.copyWithin` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.copywithin
+       exportTypedArrayMethod$m('copyWithin', function copyWithin(target, start /* , end */) {
+         return $copyWithin.call(aTypedArray$l(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
+       });

 
 

+       var ArrayBufferViewCore$k = arrayBufferViewCore;
+       var $every$1 = arrayIteration.every;

 
 

+       var aTypedArray$k = ArrayBufferViewCore$k.aTypedArray;
+       var exportTypedArrayMethod$l = ArrayBufferViewCore$k.exportTypedArrayMethod;

 
 

+       // `%TypedArray%.prototype.every` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.every
+       exportTypedArrayMethod$l('every', function every(callbackfn /* , thisArg */) {
+         return $every$1(aTypedArray$k(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       });

 
 

+       var ArrayBufferViewCore$j = arrayBufferViewCore;
+       var $fill = arrayFill$1;

 
 

+       var aTypedArray$j = ArrayBufferViewCore$j.aTypedArray;
+       var exportTypedArrayMethod$k = ArrayBufferViewCore$j.exportTypedArrayMethod;

 
 

+       // `%TypedArray%.prototype.fill` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.fill
+       // eslint-disable-next-line no-unused-vars -- required for `.length`
+       exportTypedArrayMethod$k('fill', function fill(value /* , start, end */) {
+         return $fill.apply(aTypedArray$j(this), arguments);
+       });

 
 

+       var aTypedArrayConstructor$2 = arrayBufferViewCore.aTypedArrayConstructor;
+       var speciesConstructor$5 = speciesConstructor$8;

 
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-definepropertyorthrow
+       var typedArrayFromSpeciesAndList = function (instance, list) {
+         var C = speciesConstructor$5(instance, instance.constructor);
+         var index = 0;
+         var length = list.length;
+         var result = new (aTypedArrayConstructor$2(C))(length);
+         while (length > index) result[index] = list[index++];
+         return result;
+       };

 
 

-       var DefinePropertyOrThrow = function DefinePropertyOrThrow(O, P, desc) {
-               if (Type$1(O) !== 'Object') {
-                       throw new $TypeError$a('Assertion failed: Type(O) is not Object');
-               }
+       var ArrayBufferViewCore$i = arrayBufferViewCore;
+       var $filter$1 = arrayIteration.filter;
+       var fromSpeciesAndList = typedArrayFromSpeciesAndList;

 
 

-               if (!IsPropertyKey(P)) {
-                       throw new $TypeError$a('Assertion failed: IsPropertyKey(P) is not true');
-               }
+       var aTypedArray$i = ArrayBufferViewCore$i.aTypedArray;
+       var exportTypedArrayMethod$j = ArrayBufferViewCore$i.exportTypedArrayMethod;

 
 

-               var Desc = isPropertyDescriptor({
-                       Type: Type$1,
-                       IsDataDescriptor: IsDataDescriptor,
-                       IsAccessorDescriptor: IsAccessorDescriptor
-               }, desc) ? desc : ToPropertyDescriptor(desc);
-               if (!isPropertyDescriptor({
-                       Type: Type$1,
-                       IsDataDescriptor: IsDataDescriptor,
-                       IsAccessorDescriptor: IsAccessorDescriptor
-               }, Desc)) {
-                       throw new $TypeError$a('Assertion failed: Desc is not a valid Property Descriptor');
-               }
+       // `%TypedArray%.prototype.filter` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.filter
+       exportTypedArrayMethod$j('filter', function filter(callbackfn /* , thisArg */) {
+         var list = $filter$1(aTypedArray$i(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         return fromSpeciesAndList(this, list);
+       });

 
 

-               return DefineOwnProperty(
-                       IsDataDescriptor,
-                       SameValue,
-                       FromPropertyDescriptor,
-                       O,
-                       P,
-                       Desc
-               );
-       };
+       var ArrayBufferViewCore$h = arrayBufferViewCore;
+       var $find$1 = arrayIteration.find;

 
 

-       var IsConstructor = createCommonjsModule(function (module) {
+       var aTypedArray$h = ArrayBufferViewCore$h.aTypedArray;
+       var exportTypedArrayMethod$i = ArrayBufferViewCore$h.exportTypedArrayMethod;

 
 

+       // `%TypedArray%.prototype.find` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.find
+       exportTypedArrayMethod$i('find', function find(predicate /* , thisArg */) {
+         return $find$1(aTypedArray$h(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
+       });

 
 

+       var ArrayBufferViewCore$g = arrayBufferViewCore;
+       var $findIndex$1 = arrayIteration.findIndex;

 
 

-       var $construct = GetIntrinsic('%Reflect.construct%', true);
+       var aTypedArray$g = ArrayBufferViewCore$g.aTypedArray;
+       var exportTypedArrayMethod$h = ArrayBufferViewCore$g.exportTypedArrayMethod;

 
 

-       var DefinePropertyOrThrow$1 = DefinePropertyOrThrow;
-       try {
-               DefinePropertyOrThrow$1({}, '', { '[[Get]]': function () {} });
-       } catch (e) {
-               // Accessor properties aren't supported
-               DefinePropertyOrThrow$1 = null;
-       }
-
-       // https://www.ecma-international.org/ecma-262/6.0/#sec-isconstructor
-
-       if (DefinePropertyOrThrow$1 && $construct) {
-               var isConstructorMarker = {};
-               var badArrayLike = {};
-               DefinePropertyOrThrow$1(badArrayLike, 'length', {
-                       '[[Get]]': function () {
-                               throw isConstructorMarker;
-                       },
-                       '[[Enumerable]]': true
-               });
-
-               module.exports = function IsConstructor(argument) {
-                       try {
-                               // `Reflect.construct` invokes `IsConstructor(target)` before `Get(args, 'length')`:
-                               $construct(argument, badArrayLike);
-                       } catch (err) {
-                               return err === isConstructorMarker;
-                       }
-               };
-       } else {
-               module.exports = function IsConstructor(argument) {
-                       // unfortunately there's no way to truly check this without try/catch `new argument` in old environments
-                       return typeof argument === 'function' && !!argument.prototype;
-               };
-       }
+       // `%TypedArray%.prototype.findIndex` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.findindex
+       exportTypedArrayMethod$h('findIndex', function findIndex(predicate /* , thisArg */) {
+         return $findIndex$1(aTypedArray$g(this), predicate, arguments.length > 1 ? arguments[1] : undefined);

        });
 
        });
 

-       var $String = GetIntrinsic('%String%');
-       var $TypeError$b = GetIntrinsic('%TypeError%');
+       var ArrayBufferViewCore$f = arrayBufferViewCore;
+       var $forEach = arrayIteration.forEach;

 
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-tostring
+       var aTypedArray$f = ArrayBufferViewCore$f.aTypedArray;
+       var exportTypedArrayMethod$g = ArrayBufferViewCore$f.exportTypedArrayMethod;

 
 

-       var ToString = function ToString(argument) {
-               if (typeof argument === 'symbol') {
-                       throw new $TypeError$b('Cannot convert a Symbol value to a string');
-               }
-               return $String(argument);
-       };
+       // `%TypedArray%.prototype.forEach` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.foreach
+       exportTypedArrayMethod$g('forEach', function forEach(callbackfn /* , thisArg */) {
+         $forEach(aTypedArray$f(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       });

 
 

-       var hasToStringTag$3 = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
-       var toStr$9 = Object.prototype.toString;
+       var ArrayBufferViewCore$e = arrayBufferViewCore;
+       var $includes$1 = arrayIncludes.includes;

 
 

-       var isStandardArguments = function isArguments(value) {
-               if (hasToStringTag$3 && value && typeof value === 'object' && Symbol.toStringTag in value) {
-                       return false;
-               }
-               return toStr$9.call(value) === '[object Arguments]';
-       };
+       var aTypedArray$e = ArrayBufferViewCore$e.aTypedArray;
+       var exportTypedArrayMethod$f = ArrayBufferViewCore$e.exportTypedArrayMethod;

 
 

-       var isLegacyArguments = function isArguments(value) {
-               if (isStandardArguments(value)) {
-                       return true;
-               }
-               return value !== null &&
-                       typeof value === 'object' &&
-                       typeof value.length === 'number' &&
-                       value.length >= 0 &&
-                       toStr$9.call(value) !== '[object Array]' &&
-                       toStr$9.call(value.callee) === '[object Function]';
-       };
+       // `%TypedArray%.prototype.includes` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.includes
+       exportTypedArrayMethod$f('includes', function includes(searchElement /* , fromIndex */) {
+         return $includes$1(aTypedArray$e(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+       });

 
 

-       var supportsStandardArguments = (function () {
-               return isStandardArguments(arguments);
-       }());
+       var ArrayBufferViewCore$d = arrayBufferViewCore;
+       var $indexOf = arrayIncludes.indexOf;

 
 

-       isStandardArguments.isLegacyArguments = isLegacyArguments; // for tests
+       var aTypedArray$d = ArrayBufferViewCore$d.aTypedArray;
+       var exportTypedArrayMethod$e = ArrayBufferViewCore$d.exportTypedArrayMethod;

 
 

-       var isArguments$2 = supportsStandardArguments ? isStandardArguments : isLegacyArguments;
+       // `%TypedArray%.prototype.indexOf` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.indexof
+       exportTypedArrayMethod$e('indexOf', function indexOf(searchElement /* , fromIndex */) {
+         return $indexOf(aTypedArray$d(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+       });

 
 

-       var toString = {}.toString;
+       var global$e = global$F;
+       var ArrayBufferViewCore$c = arrayBufferViewCore;
+       var ArrayIterators = es_array_iterator;
+       var wellKnownSymbol$9 = wellKnownSymbol$s;

 
 

-       var isarray = Array.isArray || function (arr) {
-         return toString.call(arr) == '[object Array]';
-       };
+       var ITERATOR$2 = wellKnownSymbol$9('iterator');
+       var Uint8Array$2 = global$e.Uint8Array;
+       var arrayValues = ArrayIterators.values;
+       var arrayKeys = ArrayIterators.keys;
+       var arrayEntries = ArrayIterators.entries;
+       var aTypedArray$c = ArrayBufferViewCore$c.aTypedArray;
+       var exportTypedArrayMethod$d = ArrayBufferViewCore$c.exportTypedArrayMethod;
+       var nativeTypedArrayIterator = Uint8Array$2 && Uint8Array$2.prototype[ITERATOR$2];

 
 

-       var strValue = String.prototype.valueOf;
-       var tryStringObject = function tryStringObject(value) {
-               try {
-                       strValue.call(value);
-                       return true;
-               } catch (e) {
-                       return false;
-               }
-       };
-       var toStr$a = Object.prototype.toString;
-       var strClass = '[object String]';
-       var hasToStringTag$4 = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol';
-
-       var isString$2 = function isString(value) {
-               if (typeof value === 'string') {
-                       return true;
-               }
-               if (typeof value !== 'object') {
-                       return false;
-               }
-               return hasToStringTag$4 ? tryStringObject(value) : toStr$a.call(value) === strClass;
-       };
+       var CORRECT_ITER_NAME = !!nativeTypedArrayIterator
+         && (nativeTypedArrayIterator.name == 'values' || nativeTypedArrayIterator.name == undefined);

 
 

-       var $Map = typeof Map === 'function' && Map.prototype ? Map : null;
-       var $Set = typeof Set === 'function' && Set.prototype ? Set : null;
-
-       var exported;
-
-       if (!$Map) {
-               // eslint-disable-next-line no-unused-vars
-               exported = function isMap(x) {
-                       // `Map` is not present in this environment.
-                       return false;
-               };
-       }
-
-       var $mapHas = $Map ? Map.prototype.has : null;
-       var $setHas = $Set ? Set.prototype.has : null;
-       if (!exported && !$mapHas) {
-               // eslint-disable-next-line no-unused-vars
-               exported = function isMap(x) {
-                       // `Map` does not have a `has` method
-                       return false;
-               };
-       }
-
-       var isMap$1 = exported || function isMap(x) {
-               if (!x || typeof x !== 'object') {
-                       return false;
-               }
-               try {
-                       $mapHas.call(x);
-                       if ($setHas) {
-                               try {
-                                       $setHas.call(x);
-                               } catch (e) {
-                                       return true;
-                               }
-                       }
-                       return x instanceof $Map; // core-js workaround, pre-v2.5.0
-               } catch (e$1) {}
-               return false;
+       var typedArrayValues = function values() {
+         return arrayValues.call(aTypedArray$c(this));

        };
 
        };
 

-       var $Map$1 = typeof Map === 'function' && Map.prototype ? Map : null;
-       var $Set$1 = typeof Set === 'function' && Set.prototype ? Set : null;
-
-       var exported$1;
-
-       if (!$Set$1) {
-               // eslint-disable-next-line no-unused-vars
-               exported$1 = function isSet(x) {
-                       // `Set` is not present in this environment.
-                       return false;
-               };
-       }
-
-       var $mapHas$1 = $Map$1 ? Map.prototype.has : null;
-       var $setHas$1 = $Set$1 ? Set.prototype.has : null;
-       if (!exported$1 && !$setHas$1) {
-               // eslint-disable-next-line no-unused-vars
-               exported$1 = function isSet(x) {
-                       // `Set` does not have a `has` method
-                       return false;
-               };
-       }
-
-       var isSet$1 = exported$1 || function isSet(x) {
-               if (!x || typeof x !== 'object') {
-                       return false;
-               }
-               try {
-                       $setHas$1.call(x);
-                       if ($mapHas$1) {
-                               try {
-                                       $mapHas$1.call(x);
-                               } catch (e) {
-                                       return true;
-                               }
-                       }
-                       return x instanceof $Set$1; // core-js workaround, pre-v2.5.0
-               } catch (e$1) {}
-               return false;
-       };
+       // `%TypedArray%.prototype.entries` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.entries
+       exportTypedArrayMethod$d('entries', function entries() {
+         return arrayEntries.call(aTypedArray$c(this));
+       });
+       // `%TypedArray%.prototype.keys` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.keys
+       exportTypedArrayMethod$d('keys', function keys() {
+         return arrayKeys.call(aTypedArray$c(this));
+       });
+       // `%TypedArray%.prototype.values` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.values
+       exportTypedArrayMethod$d('values', typedArrayValues, !CORRECT_ITER_NAME);
+       // `%TypedArray%.prototype[@@iterator]` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype-@@iterator
+       exportTypedArrayMethod$d(ITERATOR$2, typedArrayValues, !CORRECT_ITER_NAME);
+
+       var ArrayBufferViewCore$b = arrayBufferViewCore;
+
+       var aTypedArray$b = ArrayBufferViewCore$b.aTypedArray;
+       var exportTypedArrayMethod$c = ArrayBufferViewCore$b.exportTypedArrayMethod;
+       var $join = [].join;
+
+       // `%TypedArray%.prototype.join` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.join
+       // eslint-disable-next-line no-unused-vars -- required for `.length`
+       exportTypedArrayMethod$c('join', function join(separator) {
+         return $join.apply(aTypedArray$b(this), arguments);
+       });

 
 

-       var esGetIterator = createCommonjsModule(function (module) {
+       /* eslint-disable es/no-array-prototype-lastindexof -- safe */
+       var toIndexedObject$4 = toIndexedObject$b;
+       var toInteger$4 = toInteger$b;
+       var toLength$f = toLength$q;
+       var arrayMethodIsStrict$5 = arrayMethodIsStrict$8;
+
+       var min$6 = Math.min;
+       var $lastIndexOf$1 = [].lastIndexOf;
+       var NEGATIVE_ZERO = !!$lastIndexOf$1 && 1 / [1].lastIndexOf(1, -0) < 0;
+       var STRICT_METHOD$5 = arrayMethodIsStrict$5('lastIndexOf');
+       var FORCED$e = NEGATIVE_ZERO || !STRICT_METHOD$5;
+
+       // `Array.prototype.lastIndexOf` method implementation
+       // https://tc39.es/ecma262/#sec-array.prototype.lastindexof
+       var arrayLastIndexOf = FORCED$e ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {
+         // convert -0 to +0
+         if (NEGATIVE_ZERO) return $lastIndexOf$1.apply(this, arguments) || 0;
+         var O = toIndexedObject$4(this);
+         var length = toLength$f(O.length);
+         var index = length - 1;
+         if (arguments.length > 1) index = min$6(index, toInteger$4(arguments[1]));
+         if (index < 0) index = length + index;
+         for (;index >= 0; index--) if (index in O && O[index] === searchElement) return index || 0;
+         return -1;
+       } : $lastIndexOf$1;

 
 

-       /* eslint global-require: 0 */
-       // the code is structured this way so that bundlers can
-       // alias out `has-symbols` to `() => true` or `() => false` if your target
-       // environments' Symbol capabilities are known, and then use
-       // dead code elimination on the rest of this module.
-       //
-       // Similarly, `isarray` can be aliased to `Array.isArray` if
-       // available in all target environments.
-
-
-
-       if (hasSymbols$1() || shams()) {
-               var $iterator = Symbol.iterator;
-               // Symbol is available natively or shammed
-               // natively:
-               //  - Chrome >= 38
-               //  - Edge 12-14?, Edge >= 15 for sure
-               //  - FF >= 36
-               //  - Safari >= 9
-               //  - node >= 0.12
-               module.exports = function getIterator(iterable) {
-                       // alternatively, `iterable[$iterator]?.()`
-                       if (iterable != null && typeof iterable[$iterator] !== 'undefined') {
-                               return iterable[$iterator]();
-                       }
-                       if (isArguments$2(iterable)) {
-                               // arguments objects lack Symbol.iterator
-                               // - node 0.12
-                               return Array.prototype[$iterator].call(iterable);
-                       }
-               };
-       } else {
-               // Symbol is not available, native or shammed
-               var isArray = isarray;
-               var isString = isString$2;
-               var GetIntrinsic$1 = GetIntrinsic;
-               var $Map = GetIntrinsic$1('%Map%', true);
-               var $Set = GetIntrinsic$1('%Set%', true);
-               var callBound$1 = callBound;
-               var $arrayPush = callBound$1('Array.prototype.push');
-               var $charCodeAt = callBound$1('String.prototype.charCodeAt');
-               var $stringSlice = callBound$1('String.prototype.slice');
-
-               var advanceStringIndex = function advanceStringIndex(S, index) {
-                       var length = S.length;
-                       if ((index + 1) >= length) {
-                               return index + 1;
-                       }
-
-                       var first = $charCodeAt(S, index);
-                       if (first < 0xD800 || first > 0xDBFF) {
-                               return index + 1;
-                       }
-
-                       var second = $charCodeAt(S, index + 1);
-                       if (second < 0xDC00 || second > 0xDFFF) {
-                               return index + 1;
-                       }
-
-                       return index + 2;
-               };
-
-               var getArrayIterator = function getArrayIterator(arraylike) {
-                       var i = 0;
-                       return {
-                               next: function next() {
-                                       var done = i >= arraylike.length;
-                                       var value;
-                                       if (!done) {
-                                               value = arraylike[i];
-                                               i += 1;
-                                       }
-                                       return {
-                                               done: done,
-                                               value: value
-                                       };
-                               }
-                       };
-               };
-
-               var getNonCollectionIterator = function getNonCollectionIterator(iterable) {
-                       if (isArray(iterable) || isArguments$2(iterable)) {
-                               return getArrayIterator(iterable);
-                       }
-                       if (isString(iterable)) {
-                               var i = 0;
-                               return {
-                                       next: function next() {
-                                               var nextIndex = advanceStringIndex(iterable, i);
-                                               var value = $stringSlice(iterable, i, nextIndex);
-                                               i = nextIndex;
-                                               return {
-                                                       done: nextIndex > iterable.length,
-                                                       value: value
-                                               };
-                                       }
-                               };
-                       }
-               };
-
-               if (!$Map && !$Set) {
-                       // the only language iterables are Array, String, arguments
-                       // - Safari <= 6.0
-                       // - Chrome < 38
-                       // - node < 0.12
-                       // - FF < 13
-                       // - IE < 11
-                       // - Edge < 11
-
-                       module.exports = getNonCollectionIterator;
-               } else {
-                       // either Map or Set are available, but Symbol is not
-                       // - es6-shim on an ES5 browser
-                       // - Safari 6.2 (maybe 6.1?)
-                       // - FF v[13, 36)
-                       // - IE 11
-                       // - Edge 11
-                       // - Safari v[6, 9)
-
-                       var isMap = isMap$1;
-                       var isSet = isSet$1;
-
-                       // Firefox >= 27, IE 11, Safari 6.2 - 9, Edge 11, es6-shim in older envs, all have forEach
-                       var $mapForEach = callBound$1('Map.prototype.forEach', true);
-                       var $setForEach = callBound$1('Set.prototype.forEach', true);
-                       if (typeof process === 'undefined' || !process.versions || !process.versions.node) { // "if is not node"
-
-                               // Firefox 17 - 26 has `.iterator()`, whose iterator `.next()` either
-                               // returns a value, or throws a StopIteration object. These browsers
-                               // do not have any other mechanism for iteration.
-                               var $mapIterator = callBound$1('Map.prototype.iterator', true);
-                               var $setIterator = callBound$1('Set.prototype.iterator', true);
-                               var getStopIterationIterator = function (iterator) {
-                                       var done = false;
-                                       return {
-                                               next: function next() {
-                                                       try {
-                                                               return {
-                                                                       done: done,
-                                                                       value: done ? undefined : iterator.next()
-                                                               };
-                                                       } catch (e) {
-                                                               done = true;
-                                                               return {
-                                                                       done: true,
-                                                                       value: undefined
-                                                               };
-                                                       }
-                                               }
-                                       };
-                               };
-                       }
-                       // Firefox 27-35, and some older es6-shim versions, use a string "@@iterator" property
-                       // this returns a proper iterator object, so we should use it instead of forEach.
-                       // newer es6-shim versions use a string "_es6-shim iterator_" property.
-                       var $mapAtAtIterator = callBound$1('Map.prototype.@@iterator', true) || callBound$1('Map.prototype._es6-shim iterator_', true);
-                       var $setAtAtIterator = callBound$1('Set.prototype.@@iterator', true) || callBound$1('Set.prototype._es6-shim iterator_', true);
-
-                       var getCollectionIterator = function getCollectionIterator(iterable) {
-                               if (isMap(iterable)) {
-                                       if ($mapIterator) {
-                                               return getStopIterationIterator($mapIterator(iterable));
-                                       }
-                                       if ($mapAtAtIterator) {
-                                               return $mapAtAtIterator(iterable);
-                                       }
-                                       if ($mapForEach) {
-                                               var entries = [];
-                                               $mapForEach(iterable, function (v, k) {
-                                                       $arrayPush(entries, [k, v]);
-                                               });
-                                               return getArrayIterator(entries);
-                                       }
-                               }
-                               if (isSet(iterable)) {
-                                       if ($setIterator) {
-                                               return getStopIterationIterator($setIterator(iterable));
-                                       }
-                                       if ($setAtAtIterator) {
-                                               return $setAtAtIterator(iterable);
-                                       }
-                                       if ($setForEach) {
-                                               var values = [];
-                                               $setForEach(iterable, function (v) {
-                                                       $arrayPush(values, v);
-                                               });
-                                               return getArrayIterator(values);
-                                       }
-                               }
-                       };
-
-                       module.exports = function getIterator(iterable) {
-                               return getCollectionIterator(iterable) || getNonCollectionIterator(iterable);
-                       };
-               }
-       }
-       });
+       var ArrayBufferViewCore$a = arrayBufferViewCore;
+       var $lastIndexOf = arrayLastIndexOf;

 
 

-       var $TypeError$c = TypeError;
-
-       // eslint-disable-next-line consistent-return
-       var iterateIterator = function iterateIterator(iterator) {
-               if (!iterator || typeof iterator.next !== 'function') {
-                       throw new $TypeError$c('iterator must be an object with a `next` method');
-               }
-               if (arguments.length > 1) {
-                       var callback = arguments[1];
-                       if (typeof callback !== 'function') {
-                               throw new $TypeError$c('`callback`, if provided, must be a function');
-                       }
-               }
-               var values = callback || [];
-               var result;
-               while ((result = iterator.next()) && !result.done) {
-                       if (callback) {
-                               callback(result.value); // eslint-disable-line callback-return
-                       } else {
-                               values.push(result.value);
-                       }
-               }
-               if (!callback) {
-                       return values;
-               }
-       };
+       var aTypedArray$a = ArrayBufferViewCore$a.aTypedArray;
+       var exportTypedArrayMethod$b = ArrayBufferViewCore$a.exportTypedArrayMethod;

 
 

-       var $TypeError$d = TypeError;
+       // `%TypedArray%.prototype.lastIndexOf` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.lastindexof
+       // eslint-disable-next-line no-unused-vars -- required for `.length`
+       exportTypedArrayMethod$b('lastIndexOf', function lastIndexOf(searchElement /* , fromIndex */) {
+         return $lastIndexOf.apply(aTypedArray$a(this), arguments);
+       });

 
 

+       var ArrayBufferViewCore$9 = arrayBufferViewCore;
+       var $map = arrayIteration.map;
+       var speciesConstructor$4 = speciesConstructor$8;

 
 

-       var iterateValue = function iterateValue(iterable) {
-               var iterator = esGetIterator(iterable);
-               if (!iterator) {
-                       throw new $TypeError$d('non-iterable value provided');
-               }
-               if (arguments.length > 1) {
-                       return iterateIterator(iterator, arguments[1]);
-               }
-               return iterateIterator(iterator);
-       };
+       var aTypedArray$9 = ArrayBufferViewCore$9.aTypedArray;
+       var aTypedArrayConstructor$1 = ArrayBufferViewCore$9.aTypedArrayConstructor;
+       var exportTypedArrayMethod$a = ArrayBufferViewCore$9.exportTypedArrayMethod;

 
 

-       var implementation$5 = function from(items) {
-               var C = this;
-               if (items === null || typeof items === 'undefined') {
-                       throw new TypeError('`Array.from` requires an array-like object, not `null` or `undefined`');
-               }
-               var mapFn, T;
-               if (typeof arguments[1] !== 'undefined') {
-                       mapFn = arguments[1];
-                       if (!IsCallable(mapFn)) {
-                               throw new TypeError('When provided, the second argument to `Array.from` must be a function');
-                       }
-                       if (arguments.length > 2) {
-                               T = arguments[2];
-                       }
-               }
-
-               var values;
-               try {
-                       values = iterateValue(items);
-               } catch (e) {
-                       values = items;
-               }
-
-               var arrayLike = ToObject(values);
-               var len = ToLength(arrayLike.length);
-               var A = IsConstructor(C) ? ToObject(new C(len)) : new Array(len);
-               var k = 0;
-               var kValue, mappedValue;
-
-               while (k < len) {
-                       var Pk = ToString(k);
-                       kValue = Get(arrayLike, Pk);
-                       if (mapFn) {
-                               mappedValue = typeof T === 'undefined' ? mapFn(kValue, k) : Call(mapFn, T, [kValue, k]);
-                       } else {
-                               mappedValue = kValue;
-                       }
-                       CreateDataPropertyOrThrow(A, Pk, mappedValue);
-                       k += 1;
-               }
-               A.length = len;
-               return A;
-       };
+       // `%TypedArray%.prototype.map` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.map
+       exportTypedArrayMethod$a('map', function map(mapfn /* , thisArg */) {
+         return $map(aTypedArray$9(this), mapfn, arguments.length > 1 ? arguments[1] : undefined, function (O, length) {
+           return new (aTypedArrayConstructor$1(speciesConstructor$4(O, O.constructor)))(length);
+         });
+       });

 
 

-       var tryCall = function (fn) {
-               try {
-                       return fn();
-               } catch (e) {
-                       return false;
-               }
+       var aFunction$4 = aFunction$9;
+       var toObject$a = toObject$i;
+       var IndexedObject$2 = indexedObject;
+       var toLength$e = toLength$q;
+
+       // `Array.prototype.{ reduce, reduceRight }` methods implementation
+       var createMethod$3 = function (IS_RIGHT) {
+         return function (that, callbackfn, argumentsLength, memo) {
+           aFunction$4(callbackfn);
+           var O = toObject$a(that);
+           var self = IndexedObject$2(O);
+           var length = toLength$e(O.length);
+           var index = IS_RIGHT ? length - 1 : 0;
+           var i = IS_RIGHT ? -1 : 1;
+           if (argumentsLength < 2) while (true) {
+             if (index in self) {
+               memo = self[index];
+               index += i;
+               break;
+             }
+             index += i;
+             if (IS_RIGHT ? index < 0 : length <= index) {
+               throw TypeError('Reduce of empty array with no initial value');
+             }
+           }
+           for (;IS_RIGHT ? index >= 0 : length > index; index += i) if (index in self) {
+             memo = callbackfn(memo, self[index], index, O);
+           }
+           return memo;
+         };

        };
 
        };
 

-       var polyfill$8 = function getPolyfill() {
-               if (IsCallable(Array.from)) {
-                       var handlesUndefMapper = tryCall(function () {
-                               // Microsoft Edge v0.11 throws if the mapFn argument is *provided* but undefined,
-                               // but the spec doesn't care if it's provided or not - undefined doesn't throw.
-                               return Array.from([0], undefined);
-                       });
-                       if (!handlesUndefMapper) {
-                               var origArrayFrom = Array.from;
-                               return function from(items) {
-                                       /* eslint no-invalid-this: 0 */
-                                       if (arguments.length > 1 && typeof arguments[1] !== 'undefined') {
-                                               return Call(origArrayFrom, this, arguments);
-                                       } else {
-                                               return Call(origArrayFrom, this, [items]);
-                                       }
-                               };
-                       }
-                       var implemented = tryCall(function () {
-                               // Detects a Firefox bug in v32
-                               // https://bugzilla.mozilla.org/show_bug.cgi?id=1063993
-                               return Array.from({ 'length': -1 }) === 0;
-                       })
-                       && tryCall(function () {
-                               // Detects a bug in Webkit nightly r181886
-                               var arr = Array.from([0].entries());
-                               return arr.length === 1 && IsArray(arr[0]) && arr[0][0] === 0 && arr[0][1] === 0;
-                       })
-                       && tryCall(function () {
-                               return Array.from({ 'length': -Infinity });
-                       });
-                       if (implemented) {
-                               return Array.from;
-                       }
-               }
-
-               return implementation$5;
+       var arrayReduce = {
+         // `Array.prototype.reduce` method
+         // https://tc39.es/ecma262/#sec-array.prototype.reduce
+         left: createMethod$3(false),
+         // `Array.prototype.reduceRight` method
+         // https://tc39.es/ecma262/#sec-array.prototype.reduceright
+         right: createMethod$3(true)

        };
 
        };
 

-       var shim$a = function shimArrayFrom() {
-               var polyfill = polyfill$8();
+       var ArrayBufferViewCore$8 = arrayBufferViewCore;
+       var $reduce$1 = arrayReduce.left;

 
 

-               defineProperties_1(Array, { 'from': polyfill }, {
-                       'from': function () {
-                               return Array.from !== polyfill;
-                       }
-               });
+       var aTypedArray$8 = ArrayBufferViewCore$8.aTypedArray;
+       var exportTypedArrayMethod$9 = ArrayBufferViewCore$8.exportTypedArrayMethod;

 
 

-               return polyfill;
-       };
+       // `%TypedArray%.prototype.reduce` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduce
+       exportTypedArrayMethod$9('reduce', function reduce(callbackfn /* , initialValue */) {
+         return $reduce$1(aTypedArray$8(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+       });

 
 

-       var polyfill$9 = polyfill$8();
+       var ArrayBufferViewCore$7 = arrayBufferViewCore;
+       var $reduceRight = arrayReduce.right;

 
 

-       // eslint-disable-next-line no-unused-vars
-       var boundFromShim = function from(items) {
-               // eslint-disable-next-line no-invalid-this
-               return polyfill$9.apply(this || Array, arguments);
-       };
+       var aTypedArray$7 = ArrayBufferViewCore$7.aTypedArray;
+       var exportTypedArrayMethod$8 = ArrayBufferViewCore$7.exportTypedArrayMethod;

 
 

-       defineProperties_1(boundFromShim, {
-               'getPolyfill': polyfill$8,
-               'implementation': implementation$5,
-               'shim': shim$a
+       // `%TypedArray%.prototype.reduceRicht` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduceright
+       exportTypedArrayMethod$8('reduceRight', function reduceRight(callbackfn /* , initialValue */) {
+         return $reduceRight(aTypedArray$7(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);

        });
 
        });
 

-       var array_from = boundFromShim;
+       var ArrayBufferViewCore$6 = arrayBufferViewCore;

 
 

-       var $isEnumerable$2 = callBound('Object.prototype.propertyIsEnumerable');
+       var aTypedArray$6 = ArrayBufferViewCore$6.aTypedArray;
+       var exportTypedArrayMethod$7 = ArrayBufferViewCore$6.exportTypedArrayMethod;
+       var floor$5 = Math.floor;

 
 

-       var implementation$6 = function values(O) {
-               var obj = RequireObjectCoercible(O);
-               var vals = [];
-               for (var key in obj) {
-                       if (src(obj, key) && $isEnumerable$2(obj, key)) {
-                               vals.push(obj[key]);
-                       }
-               }
-               return vals;
-       };
+       // `%TypedArray%.prototype.reverse` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.reverse
+       exportTypedArrayMethod$7('reverse', function reverse() {
+         var that = this;
+         var length = aTypedArray$6(that).length;
+         var middle = floor$5(length / 2);
+         var index = 0;
+         var value;
+         while (index < middle) {
+           value = that[index];
+           that[index++] = that[--length];
+           that[length] = value;
+         } return that;
+       });

 
 

-       var polyfill$a = function getPolyfill() {
-               return typeof Object.values === 'function' ? Object.values : implementation$6;
-       };
+       var ArrayBufferViewCore$5 = arrayBufferViewCore;
+       var toLength$d = toLength$q;
+       var toOffset = toOffset$2;
+       var toObject$9 = toObject$i;
+       var fails$x = fails$N;

 
 

-       var shim$b = function shimValues() {
-               var polyfill = polyfill$a();
-               defineProperties_1(Object, { values: polyfill }, {
-                       values: function testValues() {
-                               return Object.values !== polyfill;
-                       }
-               });
-               return polyfill;
-       };
+       var aTypedArray$5 = ArrayBufferViewCore$5.aTypedArray;
+       var exportTypedArrayMethod$6 = ArrayBufferViewCore$5.exportTypedArrayMethod;

 
 

-       var polyfill$b = polyfill$a();
+       var FORCED$d = fails$x(function () {
+         // eslint-disable-next-line es/no-typed-arrays -- required for testing
+         new Int8Array(1).set({});
+       });

 
 

-       defineProperties_1(polyfill$b, {
-               getPolyfill: polyfill$a,
-               implementation: implementation$6,
-               shim: shim$b
+       // `%TypedArray%.prototype.set` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.set
+       exportTypedArrayMethod$6('set', function set(arrayLike /* , offset */) {
+         aTypedArray$5(this);
+         var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);
+         var length = this.length;
+         var src = toObject$9(arrayLike);
+         var len = toLength$d(src.length);
+         var index = 0;
+         if (len + offset > length) throw RangeError('Wrong length');
+         while (index < len) this[offset + index] = src[index++];
+       }, FORCED$d);
+
+       var ArrayBufferViewCore$4 = arrayBufferViewCore;
+       var speciesConstructor$3 = speciesConstructor$8;
+       var fails$w = fails$N;
+
+       var aTypedArray$4 = ArrayBufferViewCore$4.aTypedArray;
+       var aTypedArrayConstructor = ArrayBufferViewCore$4.aTypedArrayConstructor;
+       var exportTypedArrayMethod$5 = ArrayBufferViewCore$4.exportTypedArrayMethod;
+       var $slice$1 = [].slice;
+
+       var FORCED$c = fails$w(function () {
+         // eslint-disable-next-line es/no-typed-arrays -- required for testing
+         new Int8Array(1).slice();

        });
 
        });
 

-       var object_values = polyfill$b;
+       // `%TypedArray%.prototype.slice` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.slice
+       exportTypedArrayMethod$5('slice', function slice(start, end) {
+         var list = $slice$1.call(aTypedArray$4(this), start, end);
+         var C = speciesConstructor$3(this, this.constructor);
+         var index = 0;
+         var length = list.length;
+         var result = new (aTypedArrayConstructor(C))(length);
+         while (length > index) result[index] = list[index++];
+         return result;
+       }, FORCED$c);

 
 

-       // modified from https://github.com/es-shims/es6-shim
+       var ArrayBufferViewCore$3 = arrayBufferViewCore;
+       var $some$1 = arrayIteration.some;

 
 

+       var aTypedArray$3 = ArrayBufferViewCore$3.aTypedArray;
+       var exportTypedArrayMethod$4 = ArrayBufferViewCore$3.exportTypedArrayMethod;

 
 

-       var canBeObject = function (obj) {
-               return typeof obj !== 'undefined' && obj !== null;
-       };
-       var hasSymbols$5 = shams();
-       var toObject = Object;
-       var push = functionBind.call(Function.call, Array.prototype.push);
-       var propIsEnumerable = functionBind.call(Function.call, Object.prototype.propertyIsEnumerable);
-       var originalGetSymbols = hasSymbols$5 ? Object.getOwnPropertySymbols : null;
-
-       var implementation$7 = function assign(target, source1) {
-               var arguments$1 = arguments;
-
-               if (!canBeObject(target)) { throw new TypeError('target must be an object'); }
-               var objTarget = toObject(target);
-               var s, source, i, props, syms, value, key;
-               for (s = 1; s < arguments.length; ++s) {
-                       source = toObject(arguments$1[s]);
-                       props = objectKeys(source);
-                       var getSymbols = hasSymbols$5 && (Object.getOwnPropertySymbols || originalGetSymbols);
-                       if (getSymbols) {
-                               syms = getSymbols(source);
-                               for (i = 0; i < syms.length; ++i) {
-                                       key = syms[i];
-                                       if (propIsEnumerable(source, key)) {
-                                               push(props, key);
-                                       }
-                               }
-                       }
-                       for (i = 0; i < props.length; ++i) {
-                               key = props[i];
-                               value = source[key];
-                               if (propIsEnumerable(source, key)) {
-                                       objTarget[key] = value;
-                               }
-                       }
-               }
-               return objTarget;
-       };
+       // `%TypedArray%.prototype.some` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.some
+       exportTypedArrayMethod$4('some', function some(callbackfn /* , thisArg */) {
+         return $some$1(aTypedArray$3(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       });

 
 

-       var lacksProperEnumerationOrder = function () {
-               if (!Object.assign) {
-                       return false;
-               }
-               // v8, specifically in node 4.x, has a bug with incorrect property enumeration order
-               // note: this does not detect the bug unless there's 20 characters
-               var str = 'abcdefghijklmnopqrst';
-               var letters = str.split('');
-               var map = {};
-               for (var i = 0; i < letters.length; ++i) {
-                       map[letters[i]] = letters[i];
-               }
-               var obj = Object.assign({}, map);
-               var actual = '';
-               for (var k in obj) {
-                       actual += k;
-               }
-               return str !== actual;
-       };
+       // TODO: use something more complex like timsort?
+       var floor$4 = Math.floor;

 
 

-       var assignHasPendingExceptions = function () {
-               if (!Object.assign || !Object.preventExtensions) {
-                       return false;
-               }
-               // Firefox 37 still has "pending exception" logic in its Object.assign implementation,
-               // which is 72% slower than our shim, and Firefox 40's native implementation.
-               var thrower = Object.preventExtensions({ 1: 2 });
-               try {
-                       Object.assign(thrower, 'xy');
-               } catch (e) {
-                       return thrower[1] === 'y';
-               }
-               return false;
+       var mergeSort = function (array, comparefn) {
+         var length = array.length;
+         var middle = floor$4(length / 2);
+         return length < 8 ? insertionSort(array, comparefn) : merge$5(
+           mergeSort(array.slice(0, middle), comparefn),
+           mergeSort(array.slice(middle), comparefn),
+           comparefn
+         );

        };
 
        };
 

-       var polyfill$c = function getPolyfill() {
-               if (!Object.assign) {
-                       return implementation$7;
-               }
-               if (lacksProperEnumerationOrder()) {
-                       return implementation$7;
-               }
-               if (assignHasPendingExceptions()) {
-                       return implementation$7;
-               }
-               return Object.assign;
+       var insertionSort = function (array, comparefn) {
+         var length = array.length;
+         var i = 1;
+         var element, j;
+
+         while (i < length) {
+           j = i;
+           element = array[i];
+           while (j && comparefn(array[j - 1], element) > 0) {
+             array[j] = array[--j];
+           }
+           if (j !== i++) array[j] = element;
+         } return array;

        };
 
        };
 

-       var shim$c = function shimAssign() {
-               var polyfill = polyfill$c();
-               defineProperties_1(
-                       Object,
-                       { assign: polyfill },
-                       { assign: function () { return Object.assign !== polyfill; } }
-               );
-               return polyfill;
+       var merge$5 = function (left, right, comparefn) {
+         var llength = left.length;
+         var rlength = right.length;
+         var lindex = 0;
+         var rindex = 0;
+         var result = [];
+
+         while (lindex < llength || rindex < rlength) {
+           if (lindex < llength && rindex < rlength) {
+             result.push(comparefn(left[lindex], right[rindex]) <= 0 ? left[lindex++] : right[rindex++]);
+           } else {
+             result.push(lindex < llength ? left[lindex++] : right[rindex++]);
+           }
+         } return result;

        };
 
        };
 

-       var polyfill$d = polyfill$c();
+       var arraySort = mergeSort;

 
 

-       defineProperties_1(polyfill$d, {
-               getPolyfill: polyfill$c,
-               implementation: implementation$7,
-               shim: shim$c
-       });
+       var userAgent$2 = engineUserAgent;

 
 

-       var object_assign = polyfill$d;
+       var firefox = userAgent$2.match(/firefox\/(\d+)/i);

 
 

-       /**
-        * @this {Promise}
-        */
-       function finallyConstructor(callback) {
-         var constructor = this.constructor;
-         return this.then(
-           function(value) {
-             // @ts-ignore
-             return constructor.resolve(callback()).then(function() {
-               return value;
-             });
-           },
-           function(reason) {
-             // @ts-ignore
-             return constructor.resolve(callback()).then(function() {
-               // @ts-ignore
-               return constructor.reject(reason);
-             });
-           }
-         );
-       }
+       var engineFfVersion = !!firefox && +firefox[1];

 
 

-       // Store setTimeout reference so promise-polyfill will be unaffected by
-       // other code modifying setTimeout (like sinon.useFakeTimers())
-       var setTimeoutFunc = setTimeout;
+       var UA = engineUserAgent;

 
 

-       function isArray$4(x) {
-         return Boolean(x && typeof x.length !== 'undefined');
-       }
+       var engineIsIeOrEdge = /MSIE|Trident/.test(UA);

 
 

-       function noop$1() {}
+       var userAgent$1 = engineUserAgent;

 
 

-       // Polyfill for Function.prototype.bind
-       function bind$2(fn, thisArg) {
-         return function() {
-           fn.apply(thisArg, arguments);
-         };
-       }
+       var webkit = userAgent$1.match(/AppleWebKit\/(\d+)\./);

 
 

-       /**
-        * @constructor
-        * @param {Function} fn
-        */
-       function Promise$1(fn) {
-         if (!(this instanceof Promise$1))
-           { throw new TypeError('Promises must be constructed via new'); }
-         if (typeof fn !== 'function') { throw new TypeError('not a function'); }
-         /** @type {!number} */
-         this._state = 0;
-         /** @type {!boolean} */
-         this._handled = false;
-         /** @type {Promise|undefined} */
-         this._value = undefined;
-         /** @type {!Array<!Function>} */
-         this._deferreds = [];
-
-         doResolve(fn, this);
-       }
-
-       function handle(self, deferred) {
-         while (self._state === 3) {
-           self = self._value;
-         }
-         if (self._state === 0) {
-           self._deferreds.push(deferred);
-           return;
+       var engineWebkitVersion = !!webkit && +webkit[1];
+
+       var ArrayBufferViewCore$2 = arrayBufferViewCore;
+       var global$d = global$F;
+       var fails$v = fails$N;
+       var aFunction$3 = aFunction$9;
+       var toLength$c = toLength$q;
+       var internalSort$1 = arraySort;
+       var FF$1 = engineFfVersion;
+       var IE_OR_EDGE$1 = engineIsIeOrEdge;
+       var V8$1 = engineV8Version;
+       var WEBKIT$1 = engineWebkitVersion;
+
+       var aTypedArray$2 = ArrayBufferViewCore$2.aTypedArray;
+       var exportTypedArrayMethod$3 = ArrayBufferViewCore$2.exportTypedArrayMethod;
+       var Uint16Array = global$d.Uint16Array;
+       var nativeSort$1 = Uint16Array && Uint16Array.prototype.sort;
+
+       // WebKit
+       var ACCEPT_INCORRECT_ARGUMENTS = !!nativeSort$1 && !fails$v(function () {
+         var array = new Uint16Array(2);
+         array.sort(null);
+         array.sort({});
+       });
+
+       var STABLE_SORT$1 = !!nativeSort$1 && !fails$v(function () {
+         // feature detection can be too slow, so check engines versions
+         if (V8$1) return V8$1 < 74;
+         if (FF$1) return FF$1 < 67;
+         if (IE_OR_EDGE$1) return true;
+         if (WEBKIT$1) return WEBKIT$1 < 602;
+
+         var array = new Uint16Array(516);
+         var expected = Array(516);
+         var index, mod;
+
+         for (index = 0; index < 516; index++) {
+           mod = index % 4;
+           array[index] = 515 - index;
+           expected[index] = index - 2 * mod + 3;

          }
          }

-         self._handled = true;
-         Promise$1._immediateFn(function() {
-           var cb = self._state === 1 ? deferred.onFulfilled : deferred.onRejected;
-           if (cb === null) {
-             (self._state === 1 ? resolve : reject)(deferred.promise, self._value);
-             return;
-           }
-           var ret;
-           try {
-             ret = cb(self._value);
-           } catch (e) {
-             reject(deferred.promise, e);
-             return;
-           }
-           resolve(deferred.promise, ret);
+
+         array.sort(function (a, b) {
+           return (a / 4 | 0) - (b / 4 | 0);

          });
          });

-       }

 
 

-       function resolve(self, newValue) {
-         try {
-           // Promise Resolution Procedure: https://github.com/promises-aplus/promises-spec#the-promise-resolution-procedure
-           if (newValue === self)
-             { throw new TypeError('A promise cannot be resolved with itself.'); }
-           if (
-             newValue &&
-             (typeof newValue === 'object' || typeof newValue === 'function')
-           ) {
-             var then = newValue.then;
-             if (newValue instanceof Promise$1) {
-               self._state = 3;
-               self._value = newValue;
-               finale(self);
-               return;
-             } else if (typeof then === 'function') {
-               doResolve(bind$2(then, newValue), self);
-               return;
-             }
-           }
-           self._state = 1;
-           self._value = newValue;
-           finale(self);
-         } catch (e) {
-           reject(self, e);
+         for (index = 0; index < 516; index++) {
+           if (array[index] !== expected[index]) return true;

          }
          }

-       }
+       });

 
 

-       function reject(self, newValue) {
-         self._state = 2;
-         self._value = newValue;
-         finale(self);
-       }
+       var getSortCompare$1 = function (comparefn) {
+         return function (x, y) {
+           if (comparefn !== undefined) return +comparefn(x, y) || 0;
+           // eslint-disable-next-line no-self-compare -- NaN check
+           if (y !== y) return -1;
+           // eslint-disable-next-line no-self-compare -- NaN check
+           if (x !== x) return 1;
+           if (x === 0 && y === 0) return 1 / x > 0 && 1 / y < 0 ? 1 : -1;
+           return x > y;
+         };
+       };

 
 

-       function finale(self) {
-         if (self._state === 2 && self._deferreds.length === 0) {
-           Promise$1._immediateFn(function() {
-             if (!self._handled) {
-               Promise$1._unhandledRejectionFn(self._value);
-             }
-           });
-         }
+       // `%TypedArray%.prototype.sort` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.sort
+       exportTypedArrayMethod$3('sort', function sort(comparefn) {
+         var array = this;
+         if (comparefn !== undefined) aFunction$3(comparefn);
+         if (STABLE_SORT$1) return nativeSort$1.call(array, comparefn);
+
+         aTypedArray$2(array);
+         var arrayLength = toLength$c(array.length);
+         var items = Array(arrayLength);
+         var index;

 
 

-         for (var i = 0, len = self._deferreds.length; i < len; i++) {
-           handle(self, self._deferreds[i]);
+         for (index = 0; index < arrayLength; index++) {
+           items[index] = array[index];

          }
          }

-         self._deferreds = null;
-       }

 
 

-       /**
-        * @constructor
-        */
-       function Handler(onFulfilled, onRejected, promise) {
-         this.onFulfilled = typeof onFulfilled === 'function' ? onFulfilled : null;
-         this.onRejected = typeof onRejected === 'function' ? onRejected : null;
-         this.promise = promise;
-       }
+         items = internalSort$1(array, getSortCompare$1(comparefn));

 
 

-       /**
-        * Take a potentially misbehaving resolver function and make sure
-        * onFulfilled and onRejected are only called once.
-        *
-        * Makes no guarantees about asynchrony.
-        */
-       function doResolve(fn, self) {
-         var done = false;
-         try {
-           fn(
-             function(value) {
-               if (done) { return; }
-               done = true;
-               resolve(self, value);
-             },
-             function(reason) {
-               if (done) { return; }
-               done = true;
-               reject(self, reason);
-             }
-           );
-         } catch (ex) {
-           if (done) { return; }
-           done = true;
-           reject(self, ex);
+         for (index = 0; index < arrayLength; index++) {
+           array[index] = items[index];

          }
          }

-       }

 
 

-       Promise$1.prototype['catch'] = function(onRejected) {
-         return this.then(null, onRejected);
-       };
+         return array;
+       }, !STABLE_SORT$1 || ACCEPT_INCORRECT_ARGUMENTS);

 
 

-       Promise$1.prototype.then = function(onFulfilled, onRejected) {
-         // @ts-ignore
-         var prom = new this.constructor(noop$1);
+       var ArrayBufferViewCore$1 = arrayBufferViewCore;
+       var toLength$b = toLength$q;
+       var toAbsoluteIndex$3 = toAbsoluteIndex$8;
+       var speciesConstructor$2 = speciesConstructor$8;

 
 

-         handle(this, new Handler(onFulfilled, onRejected, prom));
-         return prom;
-       };
+       var aTypedArray$1 = ArrayBufferViewCore$1.aTypedArray;
+       var exportTypedArrayMethod$2 = ArrayBufferViewCore$1.exportTypedArrayMethod;

 
 

-       Promise$1.prototype['finally'] = finallyConstructor;
+       // `%TypedArray%.prototype.subarray` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.subarray
+       exportTypedArrayMethod$2('subarray', function subarray(begin, end) {
+         var O = aTypedArray$1(this);
+         var length = O.length;
+         var beginIndex = toAbsoluteIndex$3(begin, length);
+         return new (speciesConstructor$2(O, O.constructor))(
+           O.buffer,
+           O.byteOffset + beginIndex * O.BYTES_PER_ELEMENT,
+           toLength$b((end === undefined ? length : toAbsoluteIndex$3(end, length)) - beginIndex)
+         );
+       });

 
 

-       Promise$1.all = function(arr) {
-         return new Promise$1(function(resolve, reject) {
-           if (!isArray$4(arr)) {
-             return reject(new TypeError('Promise.all accepts an array'));
-           }
+       var global$c = global$F;
+       var ArrayBufferViewCore = arrayBufferViewCore;
+       var fails$u = fails$N;

 
 

-           var args = Array.prototype.slice.call(arr);
-           if (args.length === 0) { return resolve([]); }
-           var remaining = args.length;
+       var Int8Array$1 = global$c.Int8Array;
+       var aTypedArray = ArrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$1 = ArrayBufferViewCore.exportTypedArrayMethod;
+       var $toLocaleString = [].toLocaleString;
+       var $slice = [].slice;

 
 

-           function res(i, val) {
-             try {
-               if (val && (typeof val === 'object' || typeof val === 'function')) {
-                 var then = val.then;
-                 if (typeof then === 'function') {
-                   then.call(
-                     val,
-                     function(val) {
-                       res(i, val);
-                     },
-                     reject
-                   );
-                   return;
-                 }
-               }
-               args[i] = val;
-               if (--remaining === 0) {
-                 resolve(args);
-               }
-             } catch (ex) {
-               reject(ex);
-             }
-           }
+       // iOS Safari 6.x fails here
+       var TO_LOCALE_STRING_BUG = !!Int8Array$1 && fails$u(function () {
+         $toLocaleString.call(new Int8Array$1(1));
+       });

 
 

-           for (var i = 0; i < args.length; i++) {
-             res(i, args[i]);
-           }
-         });
-       };
+       var FORCED$b = fails$u(function () {
+         return [1, 2].toLocaleString() != new Int8Array$1([1, 2]).toLocaleString();
+       }) || !fails$u(function () {
+         Int8Array$1.prototype.toLocaleString.call([1, 2]);
+       });

 
 

-       Promise$1.resolve = function(value) {
-         if (value && typeof value === 'object' && value.constructor === Promise$1) {
-           return value;
-         }
+       // `%TypedArray%.prototype.toLocaleString` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.tolocalestring
+       exportTypedArrayMethod$1('toLocaleString', function toLocaleString() {
+         return $toLocaleString.apply(TO_LOCALE_STRING_BUG ? $slice.call(aTypedArray(this)) : aTypedArray(this), arguments);
+       }, FORCED$b);

 
 

-         return new Promise$1(function(resolve) {
-           resolve(value);
-         });
-       };
+       var exportTypedArrayMethod = arrayBufferViewCore.exportTypedArrayMethod;
+       var fails$t = fails$N;
+       var global$b = global$F;

 
 

-       Promise$1.reject = function(value) {
-         return new Promise$1(function(resolve, reject) {
-           reject(value);
-         });
-       };
+       var Uint8Array$1 = global$b.Uint8Array;
+       var Uint8ArrayPrototype = Uint8Array$1 && Uint8Array$1.prototype || {};
+       var arrayToString = [].toString;
+       var arrayJoin = [].join;

 
 

-       Promise$1.race = function(arr) {
-         return new Promise$1(function(resolve, reject) {
-           if (!isArray$4(arr)) {
-             return reject(new TypeError('Promise.race accepts an array'));
-           }
+       if (fails$t(function () { arrayToString.call({}); })) {
+         arrayToString = function toString() {
+           return arrayJoin.call(this);
+         };
+       }

 
 

-           for (var i = 0, len = arr.length; i < len; i++) {
-             Promise$1.resolve(arr[i]).then(resolve, reject);
-           }
-         });
-       };
+       var IS_NOT_ARRAY_METHOD = Uint8ArrayPrototype.toString != arrayToString;

 
 

-       // Use polyfill for setImmediate for performance gains
-       Promise$1._immediateFn =
-         // @ts-ignore
-         (typeof setImmediate === 'function' &&
-           function(fn) {
-             // @ts-ignore
-             setImmediate(fn);
-           }) ||
-         function(fn) {
-           setTimeoutFunc(fn, 0);
-         };
+       // `%TypedArray%.prototype.toString` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.tostring
+       exportTypedArrayMethod('toString', arrayToString, IS_NOT_ARRAY_METHOD);

 
 

-       Promise$1._unhandledRejectionFn = function _unhandledRejectionFn(err) {
-         if (typeof console !== 'undefined' && console) {
-           console.warn('Possible Unhandled Promise Rejection:', err); // eslint-disable-line no-console
-         }
-       };
+       var $$T = _export;
+       var IndexedObject$1 = indexedObject;
+       var toIndexedObject$3 = toIndexedObject$b;
+       var arrayMethodIsStrict$4 = arrayMethodIsStrict$8;

 
 

-       /** @suppress {undefinedVars} */
-       var globalNS = (function() {
-         // the only reliable means to get the global object is
-         // `Function('return this')()`
-         // However, this causes CSP violations in Chrome apps.
-         if (typeof self !== 'undefined') {
-           return self;
-         }
-         if (typeof window !== 'undefined') {
-           return window;
-         }
-         if (typeof global !== 'undefined') {
-           return global;
-         }
-         throw new Error('unable to locate global object');
-       })();
+       var nativeJoin = [].join;

 
 

-       if (!('Promise' in globalNS)) {
-         globalNS['Promise'] = Promise$1;
-       } else if (!globalNS.Promise.prototype['finally']) {
-         globalNS.Promise.prototype['finally'] = finallyConstructor;
-       }
+       var ES3_STRINGS = IndexedObject$1 != Object;
+       var STRICT_METHOD$4 = arrayMethodIsStrict$4('join', ',');

 
 

-       var polyfill$e = /*#__PURE__*/Object.freeze({
-               __proto__: null
+       // `Array.prototype.join` method
+       // https://tc39.es/ecma262/#sec-array.prototype.join
+       $$T({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD$4 }, {
+         join: function join(separator) {
+           return nativeJoin.call(toIndexedObject$3(this), separator === undefined ? ',' : separator);
+         }

        });
 
        });
 

-       var setAsap = createCommonjsModule(function (module) {
-       (function (thisVar, undefined$1) {
-               var main = (typeof window === 'object' && window) || (typeof commonjsGlobal === 'object' && commonjsGlobal) ||
-                       typeof self === 'object' && self || thisVar;
-
-               var hasSetImmediate = typeof setImmediate === 'function';
-               var hasNextTick = typeof process === 'object' && !!process && typeof process.nextTick === 'function';
-               var index = 0;
-
-               function getNewIndex() {
-                       if (index === 9007199254740991) {
-                               return 0;
-                       }
-                       return ++index;
-               }
-
-               var setAsap = (function () {
-                       var hiddenDiv, scriptEl, timeoutFn, callbacks;
-
-                       // Modern browsers, fastest async
-                       if (main.MutationObserver) {
-                               return function setAsap(callback) {
-                                       hiddenDiv = document.createElement("div");
-                                       (new MutationObserver(function() {
-                                               callback();
-                                               hiddenDiv = null;
-                                       })).observe(hiddenDiv, { attributes: true });
-                                       hiddenDiv.setAttribute('i', '1');
-                               };
-
-                       // Browsers that support postMessage
-                       } else if (!hasSetImmediate && main.postMessage && !main.importScripts && main.addEventListener) {
-
-                               var MESSAGE_PREFIX = "com.setImmediate" + Math.random();
-                               callbacks = {};
-
-                               var onGlobalMessage = function (event) {
-                                       if (event.source === main && event.data.indexOf(MESSAGE_PREFIX) === 0) {
-                                               var i = +event.data.split(':')[1];
-                                               callbacks[i]();
-                                               delete callbacks[i];
-                                       }
-                               };
-
-                               main.addEventListener("message", onGlobalMessage, false);
-
-                               return function setAsap(callback) {
-                                       var i = getNewIndex();
-                                       callbacks[i] = callback;
-                                       main.postMessage(MESSAGE_PREFIX + ':' + i, "*");
-                               };
-
-                               // IE browsers without postMessage
-                       } else if (!hasSetImmediate && main.document && 'onreadystatechange' in document.createElement('script')) {
-
-                               return function setAsap(callback) {
-                                       scriptEl = document.createElement("script");
-                                       scriptEl.onreadystatechange = function onreadystatechange() {
-                                               scriptEl.onreadystatechange = null;
-                                               scriptEl.parentNode.removeChild(scriptEl);
-                                               scriptEl = null;
-                                               callback();
-                                       };
-                                       document.body.appendChild(scriptEl);
-                               };
-
-                       // All other browsers and node
-                       } else {
-
-                               timeoutFn = (hasSetImmediate && setImmediate) || (hasNextTick && process.nextTick) || setTimeout;
-                               return function setAsap(callback) {
-                                       timeoutFn(callback);
-                               };
-                       }
-
-               })();
-
-               if ( module.exports) {
-                       module.exports = setAsap;
-               } else if (typeof commonjsRequire !== 'undefined' && commonjsRequire.amd) {
-                       undefined$1(function () {
-                               return setAsap;
-                       });
-               } else {
-                       main.setAsap = setAsap;
-               }
-       })(commonjsGlobal);
+       var toPrimitive$2 = toPrimitive$7;
+       var definePropertyModule = objectDefineProperty;
+       var createPropertyDescriptor$1 = createPropertyDescriptor$7;
+
+       var createProperty$4 = function (object, key, value) {
+         var propertyKey = toPrimitive$2(key);
+         if (propertyKey in object) definePropertyModule.f(object, propertyKey, createPropertyDescriptor$1(0, value));
+         else object[propertyKey] = value;
+       };
+
+       var $$S = _export;
+       var isObject$d = isObject$r;
+       var isArray$2 = isArray$6;
+       var toAbsoluteIndex$2 = toAbsoluteIndex$8;
+       var toLength$a = toLength$q;
+       var toIndexedObject$2 = toIndexedObject$b;
+       var createProperty$3 = createProperty$4;
+       var wellKnownSymbol$8 = wellKnownSymbol$s;
+       var arrayMethodHasSpeciesSupport$3 = arrayMethodHasSpeciesSupport$5;
+
+       var HAS_SPECIES_SUPPORT$2 = arrayMethodHasSpeciesSupport$3('slice');
+
+       var SPECIES$1 = wellKnownSymbol$8('species');
+       var nativeSlice = [].slice;
+       var max$3 = Math.max;
+
+       // `Array.prototype.slice` method
+       // https://tc39.es/ecma262/#sec-array.prototype.slice
+       // fallback for not array-like ES3 strings and DOM objects
+       $$S({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$2 }, {
+         slice: function slice(start, end) {
+           var O = toIndexedObject$2(this);
+           var length = toLength$a(O.length);
+           var k = toAbsoluteIndex$2(start, length);
+           var fin = toAbsoluteIndex$2(end === undefined ? length : end, length);
+           // inline `ArraySpeciesCreate` for usage native `Array#slice` where it's possible
+           var Constructor, result, n;
+           if (isArray$2(O)) {
+             Constructor = O.constructor;
+             // cross-realm fallback
+             if (typeof Constructor == 'function' && (Constructor === Array || isArray$2(Constructor.prototype))) {
+               Constructor = undefined;
+             } else if (isObject$d(Constructor)) {
+               Constructor = Constructor[SPECIES$1];
+               if (Constructor === null) Constructor = undefined;
+             }
+             if (Constructor === Array || Constructor === undefined) {
+               return nativeSlice.call(O, k, fin);
+             }
+           }
+           result = new (Constructor === undefined ? Array : Constructor)(max$3(fin - k, 0));
+           for (n = 0; k < fin; k++, n++) if (k in O) createProperty$3(result, n, O[k]);
+           result.length = n;
+           return result;
+         }

        });
 
        });
 

-       var performanceNow = createCommonjsModule(function (module) {
-       // Generated by CoffeeScript 1.12.2
-       (function() {
-         var getNanoSeconds, hrtime, loadTime, moduleLoadTime, nodeLoadTime, upTime;
+       var fails$s = fails$N;
+       var wellKnownSymbol$7 = wellKnownSymbol$s;
+       var IS_PURE = isPure;

 
 

-         if ((typeof performance !== "undefined" && performance !== null) && performance.now) {
-           module.exports = function() {
-             return performance.now();
-           };
-         } else if ((typeof process !== "undefined" && process !== null) && process.hrtime) {
-           module.exports = function() {
-             return (getNanoSeconds() - nodeLoadTime) / 1e6;
-           };
-           hrtime = process.hrtime;
-           getNanoSeconds = function() {
-             var hr;
-             hr = hrtime();
-             return hr[0] * 1e9 + hr[1];
-           };
-           moduleLoadTime = getNanoSeconds();
-           upTime = process.uptime() * 1e9;
-           nodeLoadTime = moduleLoadTime - upTime;
-         } else if (Date.now) {
-           module.exports = function() {
-             return Date.now() - loadTime;
-           };
-           loadTime = Date.now();
-         } else {
-           module.exports = function() {
-             return new Date().getTime() - loadTime;
-           };
-           loadTime = new Date().getTime();
-         }
+       var ITERATOR$1 = wellKnownSymbol$7('iterator');

 
 

-       }).call(commonjsGlobal);
+       var nativeUrl = !fails$s(function () {
+         var url = new URL('b?a=1&b=2&c=3', 'http://a');
+         var searchParams = url.searchParams;
+         var result = '';
+         url.pathname = 'c%20d';
+         searchParams.forEach(function (value, key) {
+           searchParams['delete']('b');
+           result += key + value;
+         });
+         return (IS_PURE && !url.toJSON)
+           || !searchParams.sort
+           || url.href !== 'http://a/c%20d?a=1&c=3'
+           || searchParams.get('c') !== '3'
+           || String(new URLSearchParams('?a=1')) !== 'a=1'
+           || !searchParams[ITERATOR$1]
+           // throws in Edge
+           || new URL('https://a@b').username !== 'a'
+           || new URLSearchParams(new URLSearchParams('a=b')).get('a') !== 'b'
+           // not punycoded in Edge
+           || new URL('http://тест').host !== 'xn--e1aybc'
+           // not escaped in Chrome 62-
+           || new URL('http://a#б').hash !== '#%D0%B1'
+           // fails in Chrome 66-
+           || result !== 'a1c3'
+           // throws in Safari
+           || new URL('http://x', undefined).host !== 'x';
+       });

 
 

+       var DESCRIPTORS$b = descriptors;
+       var fails$r = fails$N;
+       var objectKeys$1 = objectKeys$4;
+       var getOwnPropertySymbolsModule = objectGetOwnPropertySymbols;
+       var propertyIsEnumerableModule = objectPropertyIsEnumerable;
+       var toObject$8 = toObject$i;
+       var IndexedObject = indexedObject;
+
+       // eslint-disable-next-line es/no-object-assign -- safe
+       var $assign = Object.assign;
+       // eslint-disable-next-line es/no-object-defineproperty -- required for testing
+       var defineProperty$5 = Object.defineProperty;
+
+       // `Object.assign` method
+       // https://tc39.es/ecma262/#sec-object.assign
+       var objectAssign = !$assign || fails$r(function () {
+         // should have correct order of operations (Edge bug)
+         if (DESCRIPTORS$b && $assign({ b: 1 }, $assign(defineProperty$5({}, 'a', {
+           enumerable: true,
+           get: function () {
+             defineProperty$5(this, 'b', {
+               value: 3,
+               enumerable: false
+             });
+           }
+         }), { b: 2 })).b !== 1) return true;
+         // should work with symbols and should have deterministic property order (V8 bug)
+         var A = {};
+         var B = {};
+         // eslint-disable-next-line es/no-symbol -- safe
+         var symbol = Symbol();
+         var alphabet = 'abcdefghijklmnopqrst';
+         A[symbol] = 7;
+         alphabet.split('').forEach(function (chr) { B[chr] = chr; });
+         return $assign({}, A)[symbol] != 7 || objectKeys$1($assign({}, B)).join('') != alphabet;
+       }) ? function assign(target, source) { // eslint-disable-line no-unused-vars -- required for `.length`
+         var T = toObject$8(target);
+         var argumentsLength = arguments.length;
+         var index = 1;
+         var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;
+         var propertyIsEnumerable = propertyIsEnumerableModule.f;
+         while (argumentsLength > index) {
+           var S = IndexedObject(arguments[index++]);
+           var keys = getOwnPropertySymbols ? objectKeys$1(S).concat(getOwnPropertySymbols(S)) : objectKeys$1(S);
+           var length = keys.length;
+           var j = 0;
+           var key;
+           while (length > j) {
+             key = keys[j++];
+             if (!DESCRIPTORS$b || propertyIsEnumerable.call(S, key)) T[key] = S[key];
+           }
+         } return T;
+       } : $assign;

 
 

-       });
+       var anObject$a = anObject$m;
+       var iteratorClose = iteratorClose$2;

 
 

-       var root = typeof window === 'undefined' ? commonjsGlobal : window
-         , vendors = ['moz', 'webkit']
-         , suffix = 'AnimationFrame'
-         , raf = root['request' + suffix]
-         , caf = root['cancel' + suffix] || root['cancelRequest' + suffix];
-
-       for(var i = 0; !raf && i < vendors.length; i++) {
-         raf = root[vendors[i] + 'Request' + suffix];
-         caf = root[vendors[i] + 'Cancel' + suffix]
-             || root[vendors[i] + 'CancelRequest' + suffix];
-       }
-
-       // Some versions of FF have rAF but not cAF
-       if(!raf || !caf) {
-         var last = 0
-           , id$2 = 0
-           , queue = []
-           , frameDuration = 1000 / 60;
-
-         raf = function(callback) {
-           if(queue.length === 0) {
-             var _now = performanceNow()
-               , next = Math.max(0, frameDuration - (_now - last));
-             last = next + _now;
-             setTimeout(function() {
-               var cp = queue.slice(0);
-               // Clear queue here to prevent
-               // callbacks from appending listeners
-               // to the current frame's queue
-               queue.length = 0;
-               for(var i = 0; i < cp.length; i++) {
-                 if(!cp[i].cancelled) {
-                   try{
-                     cp[i].callback(last);
-                   } catch(e) {
-                     setTimeout(function() { throw e }, 0);
-                   }
-                 }
-               }
-             }, Math.round(next));
+       // call something on iterator step with safe closing on error
+       var callWithSafeIterationClosing$1 = function (iterator, fn, value, ENTRIES) {
+         try {
+           return ENTRIES ? fn(anObject$a(value)[0], value[1]) : fn(value);
+         } catch (error) {
+           iteratorClose(iterator);
+           throw error;
+         }
+       };
+
+       var bind$6 = functionBindContext;
+       var toObject$7 = toObject$i;
+       var callWithSafeIterationClosing = callWithSafeIterationClosing$1;
+       var isArrayIteratorMethod = isArrayIteratorMethod$3;
+       var toLength$9 = toLength$q;
+       var createProperty$2 = createProperty$4;
+       var getIteratorMethod$2 = getIteratorMethod$5;
+
+       // `Array.from` method implementation
+       // https://tc39.es/ecma262/#sec-array.from
+       var arrayFrom$1 = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {
+         var O = toObject$7(arrayLike);
+         var C = typeof this == 'function' ? this : Array;
+         var argumentsLength = arguments.length;
+         var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
+         var mapping = mapfn !== undefined;
+         var iteratorMethod = getIteratorMethod$2(O);
+         var index = 0;
+         var length, result, step, iterator, next, value;
+         if (mapping) mapfn = bind$6(mapfn, argumentsLength > 2 ? arguments[2] : undefined, 2);
+         // if the target is not iterable or it's an array with the default iterator - use a simple case
+         if (iteratorMethod != undefined && !(C == Array && isArrayIteratorMethod(iteratorMethod))) {
+           iterator = iteratorMethod.call(O);
+           next = iterator.next;
+           result = new C();
+           for (;!(step = next.call(iterator)).done; index++) {
+             value = mapping ? callWithSafeIterationClosing(iterator, mapfn, [step.value, index], true) : step.value;
+             createProperty$2(result, index, value);

            }
            }

-           queue.push({
-             handle: ++id$2,
-             callback: callback,
-             cancelled: false
-           });
-           return id$2
-         };
+         } else {
+           length = toLength$9(O.length);
+           result = new C(length);
+           for (;length > index; index++) {
+             value = mapping ? mapfn(O[index], index) : O[index];
+             createProperty$2(result, index, value);
+           }
+         }
+         result.length = index;
+         return result;
+       };

 
 

-         caf = function(handle) {
-           for(var i = 0; i < queue.length; i++) {
-             if(queue[i].handle === handle) {
-               queue[i].cancelled = true;
+       // based on https://github.com/bestiejs/punycode.js/blob/master/punycode.js
+       var maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1
+       var base = 36;
+       var tMin = 1;
+       var tMax = 26;
+       var skew = 38;
+       var damp = 700;
+       var initialBias = 72;
+       var initialN = 128; // 0x80
+       var delimiter = '-'; // '\x2D'
+       var regexNonASCII = /[^\0-\u007E]/; // non-ASCII chars
+       var regexSeparators = /[.\u3002\uFF0E\uFF61]/g; // RFC 3490 separators
+       var OVERFLOW_ERROR = 'Overflow: input needs wider integers to process';
+       var baseMinusTMin = base - tMin;
+       var floor$3 = Math.floor;
+       var stringFromCharCode = String.fromCharCode;
+
+       /**
+        * Creates an array containing the numeric code points of each Unicode
+        * character in the string. While JavaScript uses UCS-2 internally,
+        * this function will convert a pair of surrogate halves (each of which
+        * UCS-2 exposes as separate characters) into a single code point,
+        * matching UTF-16.
+        */
+       var ucs2decode = function (string) {
+         var output = [];
+         var counter = 0;
+         var length = string.length;
+         while (counter < length) {
+           var value = string.charCodeAt(counter++);
+           if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
+             // It's a high surrogate, and there is a next character.
+             var extra = string.charCodeAt(counter++);
+             if ((extra & 0xFC00) == 0xDC00) { // Low surrogate.
+               output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
+             } else {
+               // It's an unmatched surrogate; only append this code unit, in case the
+               // next code unit is the high surrogate of a surrogate pair.
+               output.push(value);
+               counter--;

              }
              }

+           } else {
+             output.push(value);

            }
            }

-         };
-       }
-
-       var raf_1 = function(fn) {
-         // Wrap in a new function to prevent
-         // `cancel` potentially being assigned
-         // to the native rAF function
-         return raf.call(root, fn)
+         }
+         return output;

        };
        };

-       var cancel = function() {
-         caf.apply(root, arguments);
+
+       /**
+        * Converts a digit/integer into a basic code point.
+        */
+       var digitToBasic = function (digit) {
+         //  0..25 map to ASCII a..z or A..Z
+         // 26..35 map to ASCII 0..9
+         return digit + 22 + 75 * (digit < 26);

        };
        };

-       var polyfill$f = function(object) {
-         if (!object) {
-           object = root;
+
+       /**
+        * Bias adaptation function as per section 3.4 of RFC 3492.
+        * https://tools.ietf.org/html/rfc3492#section-3.4
+        */
+       var adapt = function (delta, numPoints, firstTime) {
+         var k = 0;
+         delta = firstTime ? floor$3(delta / damp) : delta >> 1;
+         delta += floor$3(delta / numPoints);
+         for (; delta > baseMinusTMin * tMax >> 1; k += base) {
+           delta = floor$3(delta / baseMinusTMin);

          }
          }

-         object.requestAnimationFrame = raf;
-         object.cancelAnimationFrame = caf;
+         return floor$3(k + (baseMinusTMin + 1) * delta / (delta + skew));

        };
        };

-       raf_1.cancel = cancel;
-       raf_1.polyfill = polyfill$f;

 
 

-       var global$1 = (function(self) {
-         return self
-         // eslint-disable-next-line no-invalid-this
-       })(typeof self !== 'undefined' ? self : undefined);
-       var support = {
-         searchParams: 'URLSearchParams' in global$1,
-         iterable: 'Symbol' in global$1 && 'iterator' in Symbol,
-         blob:
-           'FileReader' in global$1 &&
-           'Blob' in global$1 &&
-           (function() {
-             try {
-               new Blob();
-               return true
-             } catch (e) {
-               return false
-             }
-           })(),
-         formData: 'FormData' in global$1,
-         arrayBuffer: 'ArrayBuffer' in global$1
-       };
+       /**
+        * Converts a string of Unicode symbols (e.g. a domain name label) to a
+        * Punycode string of ASCII-only symbols.
+        */
+       // eslint-disable-next-line max-statements -- TODO
+       var encode = function (input) {
+         var output = [];

 
 

-       function isDataView(obj) {
-         return obj && DataView.prototype.isPrototypeOf(obj)
-       }
+         // Convert the input in UCS-2 to an array of Unicode code points.
+         input = ucs2decode(input);

 
 

-       if (support.arrayBuffer) {
-         var viewClasses = [
-           '[object Int8Array]',
-           '[object Uint8Array]',
-           '[object Uint8ClampedArray]',
-           '[object Int16Array]',
-           '[object Uint16Array]',
-           '[object Int32Array]',
-           '[object Uint32Array]',
-           '[object Float32Array]',
-           '[object Float64Array]'
-         ];
+         // Cache the length.
+         var inputLength = input.length;

 
 

-         var isArrayBufferView =
-           ArrayBuffer.isView ||
-           function(obj) {
-             return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1
-           };
-       }
+         // Initialize the state.
+         var n = initialN;
+         var delta = 0;
+         var bias = initialBias;
+         var i, currentValue;

 
 

-       function normalizeName(name) {
-         if (typeof name !== 'string') {
-           name = String(name);
-         }
-         if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
-           throw new TypeError('Invalid character in header field name')
+         // Handle the basic code points.
+         for (i = 0; i < input.length; i++) {
+           currentValue = input[i];
+           if (currentValue < 0x80) {
+             output.push(stringFromCharCode(currentValue));
+           }

          }
          }

-         return name.toLowerCase()
-       }

 
 

-       function normalizeValue(value) {
-         if (typeof value !== 'string') {
-           value = String(value);
+         var basicLength = output.length; // number of basic code points.
+         var handledCPCount = basicLength; // number of code points that have been handled;
+
+         // Finish the basic string with a delimiter unless it's empty.
+         if (basicLength) {
+           output.push(delimiter);

          }
          }

-         return value
-       }

 
 

-       // Build a destructive iterator for the value list
-       function iteratorFor(items) {
-         var iterator = {
-           next: function() {
-             var value = items.shift();
-             return {done: value === undefined, value: value}
+         // Main encoding loop:
+         while (handledCPCount < inputLength) {
+           // All non-basic code points < n have been handled already. Find the next larger one:
+           var m = maxInt;
+           for (i = 0; i < input.length; i++) {
+             currentValue = input[i];
+             if (currentValue >= n && currentValue < m) {
+               m = currentValue;
+             }

            }
            }

-         };

 
 

-         if (support.iterable) {
-           iterator[Symbol.iterator] = function() {
-             return iterator
-           };
-         }
+           // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>, but guard against overflow.
+           var handledCPCountPlusOne = handledCPCount + 1;
+           if (m - n > floor$3((maxInt - delta) / handledCPCountPlusOne)) {
+             throw RangeError(OVERFLOW_ERROR);
+           }

 
 

-         return iterator
-       }
+           delta += (m - n) * handledCPCountPlusOne;
+           n = m;

 
 

-       function Headers(headers) {
-         this.map = {};
+           for (i = 0; i < input.length; i++) {
+             currentValue = input[i];
+             if (currentValue < n && ++delta > maxInt) {
+               throw RangeError(OVERFLOW_ERROR);
+             }
+             if (currentValue == n) {
+               // Represent delta as a generalized variable-length integer.
+               var q = delta;
+               for (var k = base; /* no condition */; k += base) {
+                 var t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+                 if (q < t) break;
+                 var qMinusT = q - t;
+                 var baseMinusT = base - t;
+                 output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT)));
+                 q = floor$3(qMinusT / baseMinusT);
+               }
+
+               output.push(stringFromCharCode(digitToBasic(q)));
+               bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
+               delta = 0;
+               ++handledCPCount;
+             }
+           }

 
 

-         if (headers instanceof Headers) {
-           headers.forEach(function(value, name) {
-             this.append(name, value);
-           }, this);
-         } else if (Array.isArray(headers)) {
-           headers.forEach(function(header) {
-             this.append(header[0], header[1]);
-           }, this);
-         } else if (headers) {
-           Object.getOwnPropertyNames(headers).forEach(function(name) {
-             this.append(name, headers[name]);
-           }, this);
+           ++delta;
+           ++n;
+         }
+         return output.join('');
+       };
+
+       var stringPunycodeToAscii = function (input) {
+         var encoded = [];
+         var labels = input.toLowerCase().replace(regexSeparators, '\u002E').split('.');
+         var i, label;
+         for (i = 0; i < labels.length; i++) {
+           label = labels[i];
+           encoded.push(regexNonASCII.test(label) ? 'xn--' + encode(label) : label);
+         }
+         return encoded.join('.');
+       };
+
+       var anObject$9 = anObject$m;
+       var getIteratorMethod$1 = getIteratorMethod$5;
+
+       var getIterator$1 = function (it) {
+         var iteratorMethod = getIteratorMethod$1(it);
+         if (typeof iteratorMethod != 'function') {
+           throw TypeError(String(it) + ' is not iterable');
+         } return anObject$9(iteratorMethod.call(it));
+       };
+
+       // TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
+
+       var $$R = _export;
+       var getBuiltIn$2 = getBuiltIn$9;
+       var USE_NATIVE_URL$1 = nativeUrl;
+       var redefine$7 = redefine$g.exports;
+       var redefineAll$1 = redefineAll$4;
+       var setToStringTag$4 = setToStringTag$a;
+       var createIteratorConstructor = createIteratorConstructor$2;
+       var InternalStateModule$2 = internalState;
+       var anInstance$3 = anInstance$7;
+       var hasOwn = has$j;
+       var bind$5 = functionBindContext;
+       var classof$4 = classof$b;
+       var anObject$8 = anObject$m;
+       var isObject$c = isObject$r;
+       var create$8 = objectCreate;
+       var createPropertyDescriptor = createPropertyDescriptor$7;
+       var getIterator = getIterator$1;
+       var getIteratorMethod = getIteratorMethod$5;
+       var wellKnownSymbol$6 = wellKnownSymbol$s;
+
+       var $fetch = getBuiltIn$2('fetch');
+       var Headers$1 = getBuiltIn$2('Headers');
+       var ITERATOR = wellKnownSymbol$6('iterator');
+       var URL_SEARCH_PARAMS = 'URLSearchParams';
+       var URL_SEARCH_PARAMS_ITERATOR = URL_SEARCH_PARAMS + 'Iterator';
+       var setInternalState$2 = InternalStateModule$2.set;
+       var getInternalParamsState = InternalStateModule$2.getterFor(URL_SEARCH_PARAMS);
+       var getInternalIteratorState = InternalStateModule$2.getterFor(URL_SEARCH_PARAMS_ITERATOR);
+
+       var plus = /\+/g;
+       var sequences = Array(4);
+
+       var percentSequence = function (bytes) {
+         return sequences[bytes - 1] || (sequences[bytes - 1] = RegExp('((?:%[\\da-f]{2}){' + bytes + '})', 'gi'));
+       };
+
+       var percentDecode = function (sequence) {
+         try {
+           return decodeURIComponent(sequence);
+         } catch (error) {
+           return sequence;

          }
          }

-       }
-
-       Headers.prototype.append = function(name, value) {
-         name = normalizeName(name);
-         value = normalizeValue(value);
-         var oldValue = this.map[name];
-         this.map[name] = oldValue ? oldValue + ', ' + value : value;

        };
 
        };
 

-       Headers.prototype['delete'] = function(name) {
-         delete this.map[normalizeName(name)];
+       var deserialize = function (it) {
+         var result = it.replace(plus, ' ');
+         var bytes = 4;
+         try {
+           return decodeURIComponent(result);
+         } catch (error) {
+           while (bytes) {
+             result = result.replace(percentSequence(bytes--), percentDecode);
+           }
+           return result;
+         }

        };
 
        };
 

-       Headers.prototype.get = function(name) {
-         name = normalizeName(name);
-         return this.has(name) ? this.map[name] : null
+       var find$1 = /[!'()~]|%20/g;
+
+       var replace$1 = {
+         '!': '%21',
+         "'": '%27',
+         '(': '%28',
+         ')': '%29',
+         '~': '%7E',
+         '%20': '+'

        };
 
        };
 

-       Headers.prototype.has = function(name) {
-         return this.map.hasOwnProperty(normalizeName(name))
+       var replacer = function (match) {
+         return replace$1[match];

        };
 
        };
 

-       Headers.prototype.set = function(name, value) {
-         this.map[normalizeName(name)] = normalizeValue(value);
+       var serialize = function (it) {
+         return encodeURIComponent(it).replace(find$1, replacer);

        };
 
        };
 

-       Headers.prototype.forEach = function(callback, thisArg) {
-         for (var name in this.map) {
-           if (this.map.hasOwnProperty(name)) {
-             callback.call(thisArg, this.map[name], name, this);
+       var parseSearchParams = function (result, query) {
+         if (query) {
+           var attributes = query.split('&');
+           var index = 0;
+           var attribute, entry;
+           while (index < attributes.length) {
+             attribute = attributes[index++];
+             if (attribute.length) {
+               entry = attribute.split('=');
+               result.push({
+                 key: deserialize(entry.shift()),
+                 value: deserialize(entry.join('='))
+               });
+             }

            }
          }
        };
 
            }
          }
        };
 

-       Headers.prototype.keys = function() {
-         var items = [];
-         this.forEach(function(value, name) {
-           items.push(name);
-         });
-         return iteratorFor(items)
+       var updateSearchParams = function (query) {
+         this.entries.length = 0;
+         parseSearchParams(this.entries, query);

        };
 
        };
 

-       Headers.prototype.values = function() {
-         var items = [];
-         this.forEach(function(value) {
-           items.push(value);
-         });
-         return iteratorFor(items)
+       var validateArgumentsLength = function (passed, required) {
+         if (passed < required) throw TypeError('Not enough arguments');

        };
 
        };
 

-       Headers.prototype.entries = function() {
-         var items = [];
-         this.forEach(function(value, name) {
-           items.push([name, value]);
+       var URLSearchParamsIterator = createIteratorConstructor(function Iterator(params, kind) {
+         setInternalState$2(this, {
+           type: URL_SEARCH_PARAMS_ITERATOR,
+           iterator: getIterator(getInternalParamsState(params).entries),
+           kind: kind

          });
          });

-         return iteratorFor(items)
+       }, 'Iterator', function next() {
+         var state = getInternalIteratorState(this);
+         var kind = state.kind;
+         var step = state.iterator.next();
+         var entry = step.value;
+         if (!step.done) {
+           step.value = kind === 'keys' ? entry.key : kind === 'values' ? entry.value : [entry.key, entry.value];
+         } return step;
+       });
+
+       // `URLSearchParams` constructor
+       // https://url.spec.whatwg.org/#interface-urlsearchparams
+       var URLSearchParamsConstructor = function URLSearchParams(/* init */) {
+         anInstance$3(this, URLSearchParamsConstructor, URL_SEARCH_PARAMS);
+         var init = arguments.length > 0 ? arguments[0] : undefined;
+         var that = this;
+         var entries = [];
+         var iteratorMethod, iterator, next, step, entryIterator, entryNext, first, second, key;
+
+         setInternalState$2(that, {
+           type: URL_SEARCH_PARAMS,
+           entries: entries,
+           updateURL: function () { /* empty */ },
+           updateSearchParams: updateSearchParams
+         });
+
+         if (init !== undefined) {
+           if (isObject$c(init)) {
+             iteratorMethod = getIteratorMethod(init);
+             if (typeof iteratorMethod === 'function') {
+               iterator = iteratorMethod.call(init);
+               next = iterator.next;
+               while (!(step = next.call(iterator)).done) {
+                 entryIterator = getIterator(anObject$8(step.value));
+                 entryNext = entryIterator.next;
+                 if (
+                   (first = entryNext.call(entryIterator)).done ||
+                   (second = entryNext.call(entryIterator)).done ||
+                   !entryNext.call(entryIterator).done
+                 ) throw TypeError('Expected sequence with length 2');
+                 entries.push({ key: first.value + '', value: second.value + '' });
+               }
+             } else for (key in init) if (hasOwn(init, key)) entries.push({ key: key, value: init[key] + '' });
+           } else {
+             parseSearchParams(entries, typeof init === 'string' ? init.charAt(0) === '?' ? init.slice(1) : init : init + '');
+           }
+         }

        };
 
        };
 

-       if (support.iterable) {
-         Headers.prototype[Symbol.iterator] = Headers.prototype.entries;
-       }
+       var URLSearchParamsPrototype = URLSearchParamsConstructor.prototype;

 
 

-       function consumed(body) {
-         if (body.bodyUsed) {
-           return Promise.reject(new TypeError('Already read'))
+       redefineAll$1(URLSearchParamsPrototype, {
+         // `URLSearchParams.prototype.append` method
+         // https://url.spec.whatwg.org/#dom-urlsearchparams-append
+         append: function append(name, value) {
+           validateArgumentsLength(arguments.length, 2);
+           var state = getInternalParamsState(this);
+           state.entries.push({ key: name + '', value: value + '' });
+           state.updateURL();
+         },
+         // `URLSearchParams.prototype.delete` method
+         // https://url.spec.whatwg.org/#dom-urlsearchparams-delete
+         'delete': function (name) {
+           validateArgumentsLength(arguments.length, 1);
+           var state = getInternalParamsState(this);
+           var entries = state.entries;
+           var key = name + '';
+           var index = 0;
+           while (index < entries.length) {
+             if (entries[index].key === key) entries.splice(index, 1);
+             else index++;
+           }
+           state.updateURL();
+         },
+         // `URLSearchParams.prototype.get` method
+         // https://url.spec.whatwg.org/#dom-urlsearchparams-get
+         get: function get(name) {
+           validateArgumentsLength(arguments.length, 1);
+           var entries = getInternalParamsState(this).entries;
+           var key = name + '';
+           var index = 0;
+           for (; index < entries.length; index++) {
+             if (entries[index].key === key) return entries[index].value;
+           }
+           return null;
+         },
+         // `URLSearchParams.prototype.getAll` method
+         // https://url.spec.whatwg.org/#dom-urlsearchparams-getall
+         getAll: function getAll(name) {
+           validateArgumentsLength(arguments.length, 1);
+           var entries = getInternalParamsState(this).entries;
+           var key = name + '';
+           var result = [];
+           var index = 0;
+           for (; index < entries.length; index++) {
+             if (entries[index].key === key) result.push(entries[index].value);
+           }
+           return result;
+         },
+         // `URLSearchParams.prototype.has` method
+         // https://url.spec.whatwg.org/#dom-urlsearchparams-has
+         has: function has(name) {
+           validateArgumentsLength(arguments.length, 1);
+           var entries = getInternalParamsState(this).entries;
+           var key = name + '';
+           var index = 0;
+           while (index < entries.length) {
+             if (entries[index++].key === key) return true;
+           }
+           return false;
+         },
+         // `URLSearchParams.prototype.set` method
+         // https://url.spec.whatwg.org/#dom-urlsearchparams-set
+         set: function set(name, value) {
+           validateArgumentsLength(arguments.length, 1);
+           var state = getInternalParamsState(this);
+           var entries = state.entries;
+           var found = false;
+           var key = name + '';
+           var val = value + '';
+           var index = 0;
+           var entry;
+           for (; index < entries.length; index++) {
+             entry = entries[index];
+             if (entry.key === key) {
+               if (found) entries.splice(index--, 1);
+               else {
+                 found = true;
+                 entry.value = val;
+               }
+             }
+           }
+           if (!found) entries.push({ key: key, value: val });
+           state.updateURL();
+         },
+         // `URLSearchParams.prototype.sort` method
+         // https://url.spec.whatwg.org/#dom-urlsearchparams-sort
+         sort: function sort() {
+           var state = getInternalParamsState(this);
+           var entries = state.entries;
+           // Array#sort is not stable in some engines
+           var slice = entries.slice();
+           var entry, entriesIndex, sliceIndex;
+           entries.length = 0;
+           for (sliceIndex = 0; sliceIndex < slice.length; sliceIndex++) {
+             entry = slice[sliceIndex];
+             for (entriesIndex = 0; entriesIndex < sliceIndex; entriesIndex++) {
+               if (entries[entriesIndex].key > entry.key) {
+                 entries.splice(entriesIndex, 0, entry);
+                 break;
+               }
+             }
+             if (entriesIndex === sliceIndex) entries.push(entry);
+           }
+           state.updateURL();
+         },
+         // `URLSearchParams.prototype.forEach` method
+         forEach: function forEach(callback /* , thisArg */) {
+           var entries = getInternalParamsState(this).entries;
+           var boundFunction = bind$5(callback, arguments.length > 1 ? arguments[1] : undefined, 3);
+           var index = 0;
+           var entry;
+           while (index < entries.length) {
+             entry = entries[index++];
+             boundFunction(entry.value, entry.key, this);
+           }
+         },
+         // `URLSearchParams.prototype.keys` method
+         keys: function keys() {
+           return new URLSearchParamsIterator(this, 'keys');
+         },
+         // `URLSearchParams.prototype.values` method
+         values: function values() {
+           return new URLSearchParamsIterator(this, 'values');
+         },
+         // `URLSearchParams.prototype.entries` method
+         entries: function entries() {
+           return new URLSearchParamsIterator(this, 'entries');

          }
          }

-         body.bodyUsed = true;
-       }
+       }, { enumerable: true });

 
 

-       function fileReaderReady(reader) {
-         return new Promise(function(resolve, reject) {
-           reader.onload = function() {
-             resolve(reader.result);
-           };
-           reader.onerror = function() {
-             reject(reader.error);
-           };
-         })
-       }
+       // `URLSearchParams.prototype[@@iterator]` method
+       redefine$7(URLSearchParamsPrototype, ITERATOR, URLSearchParamsPrototype.entries);

 
 

-       function readBlobAsArrayBuffer(blob) {
-         var reader = new FileReader();
-         var promise = fileReaderReady(reader);
-         reader.readAsArrayBuffer(blob);
-         return promise
-       }
+       // `URLSearchParams.prototype.toString` method
+       // https://url.spec.whatwg.org/#urlsearchparams-stringification-behavior
+       redefine$7(URLSearchParamsPrototype, 'toString', function toString() {
+         var entries = getInternalParamsState(this).entries;
+         var result = [];
+         var index = 0;
+         var entry;
+         while (index < entries.length) {
+           entry = entries[index++];
+           result.push(serialize(entry.key) + '=' + serialize(entry.value));
+         } return result.join('&');
+       }, { enumerable: true });

 
 

-       function readBlobAsText(blob) {
-         var reader = new FileReader();
-         var promise = fileReaderReady(reader);
-         reader.readAsText(blob);
-         return promise
-       }
+       setToStringTag$4(URLSearchParamsConstructor, URL_SEARCH_PARAMS);

 
 

-       function readArrayBufferAsText(buf) {
-         var view = new Uint8Array(buf);
-         var chars = new Array(view.length);
+       $$R({ global: true, forced: !USE_NATIVE_URL$1 }, {
+         URLSearchParams: URLSearchParamsConstructor
+       });

 
 

-         for (var i = 0; i < view.length; i++) {
-           chars[i] = String.fromCharCode(view[i]);
-         }
-         return chars.join('')
+       // Wrap `fetch` for correct work with polyfilled `URLSearchParams`
+       // https://github.com/zloirock/core-js/issues/674
+       if (!USE_NATIVE_URL$1 && typeof $fetch == 'function' && typeof Headers$1 == 'function') {
+         $$R({ global: true, enumerable: true, forced: true }, {
+           fetch: function fetch(input /* , init */) {
+             var args = [input];
+             var init, body, headers;
+             if (arguments.length > 1) {
+               init = arguments[1];
+               if (isObject$c(init)) {
+                 body = init.body;
+                 if (classof$4(body) === URL_SEARCH_PARAMS) {
+                   headers = init.headers ? new Headers$1(init.headers) : new Headers$1();
+                   if (!headers.has('content-type')) {
+                     headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
+                   }
+                   init = create$8(init, {
+                     body: createPropertyDescriptor(0, String(body)),
+                     headers: createPropertyDescriptor(0, headers)
+                   });
+                 }
+               }
+               args.push(init);
+             } return $fetch.apply(this, args);
+           }
+         });

        }
 
        }
 

-       function bufferClone(buf) {
-         if (buf.slice) {
-           return buf.slice(0)
+       var web_urlSearchParams = {
+         URLSearchParams: URLSearchParamsConstructor,
+         getState: getInternalParamsState
+       };
+
+       // TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
+
+       var $$Q = _export;
+       var DESCRIPTORS$a = descriptors;
+       var USE_NATIVE_URL = nativeUrl;
+       var global$a = global$F;
+       var defineProperties$1 = objectDefineProperties;
+       var redefine$6 = redefine$g.exports;
+       var anInstance$2 = anInstance$7;
+       var has$4 = has$j;
+       var assign$2 = objectAssign;
+       var arrayFrom = arrayFrom$1;
+       var codeAt = stringMultibyte.codeAt;
+       var toASCII = stringPunycodeToAscii;
+       var setToStringTag$3 = setToStringTag$a;
+       var URLSearchParamsModule = web_urlSearchParams;
+       var InternalStateModule$1 = internalState;
+
+       var NativeURL = global$a.URL;
+       var URLSearchParams$1 = URLSearchParamsModule.URLSearchParams;
+       var getInternalSearchParamsState = URLSearchParamsModule.getState;
+       var setInternalState$1 = InternalStateModule$1.set;
+       var getInternalURLState = InternalStateModule$1.getterFor('URL');
+       var floor$2 = Math.floor;
+       var pow$1 = Math.pow;
+
+       var INVALID_AUTHORITY = 'Invalid authority';
+       var INVALID_SCHEME = 'Invalid scheme';
+       var INVALID_HOST = 'Invalid host';
+       var INVALID_PORT = 'Invalid port';
+
+       var ALPHA = /[A-Za-z]/;
+       // eslint-disable-next-line regexp/no-obscure-range -- safe
+       var ALPHANUMERIC = /[\d+-.A-Za-z]/;
+       var DIGIT = /\d/;
+       var HEX_START = /^0x/i;
+       var OCT = /^[0-7]+$/;
+       var DEC = /^\d+$/;
+       var HEX = /^[\dA-Fa-f]+$/;
+       /* eslint-disable no-control-regex -- safe */
+       var FORBIDDEN_HOST_CODE_POINT = /[\0\t\n\r #%/:<>?@[\\\]^|]/;
+       var FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\0\t\n\r #/:<>?@[\\\]^|]/;
+       var LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\u0000-\u001F ]+|[\u0000-\u001F ]+$/g;
+       var TAB_AND_NEW_LINE = /[\t\n\r]/g;
+       /* eslint-enable no-control-regex -- safe */
+       var EOF;
+
+       var parseHost = function (url, input) {
+         var result, codePoints, index;
+         if (input.charAt(0) == '[') {
+           if (input.charAt(input.length - 1) != ']') return INVALID_HOST;
+           result = parseIPv6(input.slice(1, -1));
+           if (!result) return INVALID_HOST;
+           url.host = result;
+         // opaque host
+         } else if (!isSpecial(url)) {
+           if (FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT.test(input)) return INVALID_HOST;
+           result = '';
+           codePoints = arrayFrom(input);
+           for (index = 0; index < codePoints.length; index++) {
+             result += percentEncode(codePoints[index], C0ControlPercentEncodeSet);
+           }
+           url.host = result;

          } else {
          } else {

-           var view = new Uint8Array(buf.byteLength);
-           view.set(new Uint8Array(buf));
-           return view.buffer
-         }
-       }
+           input = toASCII(input);
+           if (FORBIDDEN_HOST_CODE_POINT.test(input)) return INVALID_HOST;
+           result = parseIPv4(input);
+           if (result === null) return INVALID_HOST;
+           url.host = result;
+         }
+       };
+
+       var parseIPv4 = function (input) {
+         var parts = input.split('.');
+         var partsLength, numbers, index, part, radix, number, ipv4;
+         if (parts.length && parts[parts.length - 1] == '') {
+           parts.pop();
+         }
+         partsLength = parts.length;
+         if (partsLength > 4) return input;
+         numbers = [];
+         for (index = 0; index < partsLength; index++) {
+           part = parts[index];
+           if (part == '') return input;
+           radix = 10;
+           if (part.length > 1 && part.charAt(0) == '0') {
+             radix = HEX_START.test(part) ? 16 : 8;
+             part = part.slice(radix == 8 ? 1 : 2);
+           }
+           if (part === '') {
+             number = 0;
+           } else {
+             if (!(radix == 10 ? DEC : radix == 8 ? OCT : HEX).test(part)) return input;
+             number = parseInt(part, radix);
+           }
+           numbers.push(number);
+         }
+         for (index = 0; index < partsLength; index++) {
+           number = numbers[index];
+           if (index == partsLength - 1) {
+             if (number >= pow$1(256, 5 - partsLength)) return null;
+           } else if (number > 255) return null;
+         }
+         ipv4 = numbers.pop();
+         for (index = 0; index < numbers.length; index++) {
+           ipv4 += numbers[index] * pow$1(256, 3 - index);
+         }
+         return ipv4;
+       };
+
+       // eslint-disable-next-line max-statements -- TODO
+       var parseIPv6 = function (input) {
+         var address = [0, 0, 0, 0, 0, 0, 0, 0];
+         var pieceIndex = 0;
+         var compress = null;
+         var pointer = 0;
+         var value, length, numbersSeen, ipv4Piece, number, swaps, swap;
+
+         var char = function () {
+           return input.charAt(pointer);
+         };
+
+         if (char() == ':') {
+           if (input.charAt(1) != ':') return;
+           pointer += 2;
+           pieceIndex++;
+           compress = pieceIndex;
+         }
+         while (char()) {
+           if (pieceIndex == 8) return;
+           if (char() == ':') {
+             if (compress !== null) return;
+             pointer++;
+             pieceIndex++;
+             compress = pieceIndex;
+             continue;
+           }
+           value = length = 0;
+           while (length < 4 && HEX.test(char())) {
+             value = value * 16 + parseInt(char(), 16);
+             pointer++;
+             length++;
+           }
+           if (char() == '.') {
+             if (length == 0) return;
+             pointer -= length;
+             if (pieceIndex > 6) return;
+             numbersSeen = 0;
+             while (char()) {
+               ipv4Piece = null;
+               if (numbersSeen > 0) {
+                 if (char() == '.' && numbersSeen < 4) pointer++;
+                 else return;
+               }
+               if (!DIGIT.test(char())) return;
+               while (DIGIT.test(char())) {
+                 number = parseInt(char(), 10);
+                 if (ipv4Piece === null) ipv4Piece = number;
+                 else if (ipv4Piece == 0) return;
+                 else ipv4Piece = ipv4Piece * 10 + number;
+                 if (ipv4Piece > 255) return;
+                 pointer++;
+               }
+               address[pieceIndex] = address[pieceIndex] * 256 + ipv4Piece;
+               numbersSeen++;
+               if (numbersSeen == 2 || numbersSeen == 4) pieceIndex++;
+             }
+             if (numbersSeen != 4) return;
+             break;
+           } else if (char() == ':') {
+             pointer++;
+             if (!char()) return;
+           } else if (char()) return;
+           address[pieceIndex++] = value;
+         }
+         if (compress !== null) {
+           swaps = pieceIndex - compress;
+           pieceIndex = 7;
+           while (pieceIndex != 0 && swaps > 0) {
+             swap = address[pieceIndex];
+             address[pieceIndex--] = address[compress + swaps - 1];
+             address[compress + --swaps] = swap;
+           }
+         } else if (pieceIndex != 8) return;
+         return address;
+       };
+
+       var findLongestZeroSequence = function (ipv6) {
+         var maxIndex = null;
+         var maxLength = 1;
+         var currStart = null;
+         var currLength = 0;
+         var index = 0;
+         for (; index < 8; index++) {
+           if (ipv6[index] !== 0) {
+             if (currLength > maxLength) {
+               maxIndex = currStart;
+               maxLength = currLength;
+             }
+             currStart = null;
+             currLength = 0;
+           } else {
+             if (currStart === null) currStart = index;
+             ++currLength;
+           }
+         }
+         if (currLength > maxLength) {
+           maxIndex = currStart;
+           maxLength = currLength;
+         }
+         return maxIndex;
+       };
+
+       var serializeHost = function (host) {
+         var result, index, compress, ignore0;
+         // ipv4
+         if (typeof host == 'number') {
+           result = [];
+           for (index = 0; index < 4; index++) {
+             result.unshift(host % 256);
+             host = floor$2(host / 256);
+           } return result.join('.');
+         // ipv6
+         } else if (typeof host == 'object') {
+           result = '';
+           compress = findLongestZeroSequence(host);
+           for (index = 0; index < 8; index++) {
+             if (ignore0 && host[index] === 0) continue;
+             if (ignore0) ignore0 = false;
+             if (compress === index) {
+               result += index ? ':' : '::';
+               ignore0 = true;
+             } else {
+               result += host[index].toString(16);
+               if (index < 7) result += ':';
+             }
+           }
+           return '[' + result + ']';
+         } return host;
+       };

 
 

-       function Body() {
-         this.bodyUsed = false;
+       var C0ControlPercentEncodeSet = {};
+       var fragmentPercentEncodeSet = assign$2({}, C0ControlPercentEncodeSet, {
+         ' ': 1, '"': 1, '<': 1, '>': 1, '`': 1
+       });
+       var pathPercentEncodeSet = assign$2({}, fragmentPercentEncodeSet, {
+         '#': 1, '?': 1, '{': 1, '}': 1
+       });
+       var userinfoPercentEncodeSet = assign$2({}, pathPercentEncodeSet, {
+         '/': 1, ':': 1, ';': 1, '=': 1, '@': 1, '[': 1, '\\': 1, ']': 1, '^': 1, '|': 1
+       });

 
 

-         this._initBody = function(body) {
-           /*
-             fetch-mock wraps the Response object in an ES6 Proxy to
-             provide useful test harness features such as flush. However, on
-             ES5 browsers without fetch or Proxy support pollyfills must be used;
-             the proxy-pollyfill is unable to proxy an attribute unless it exists
-             on the object before the Proxy is created. This change ensures
-             Response.bodyUsed exists on the instance, while maintaining the
-             semantic of setting Request.bodyUsed in the constructor before
-             _initBody is called.
-           */
-           this.bodyUsed = this.bodyUsed;
-           this._bodyInit = body;
-           if (!body) {
-             this._bodyText = '';
-           } else if (typeof body === 'string') {
-             this._bodyText = body;
-           } else if (support.blob && Blob.prototype.isPrototypeOf(body)) {
-             this._bodyBlob = body;
-           } else if (support.formData && FormData.prototype.isPrototypeOf(body)) {
-             this._bodyFormData = body;
-           } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
-             this._bodyText = body.toString();
-           } else if (support.arrayBuffer && support.blob && isDataView(body)) {
-             this._bodyArrayBuffer = bufferClone(body.buffer);
-             // IE 10-11 can't handle a DataView body.
-             this._bodyInit = new Blob([this._bodyArrayBuffer]);
-           } else if (support.arrayBuffer && (ArrayBuffer.prototype.isPrototypeOf(body) || isArrayBufferView(body))) {
-             this._bodyArrayBuffer = bufferClone(body);
-           } else {
-             this._bodyText = body = Object.prototype.toString.call(body);
-           }
+       var percentEncode = function (char, set) {
+         var code = codeAt(char, 0);
+         return code > 0x20 && code < 0x7F && !has$4(set, char) ? char : encodeURIComponent(char);
+       };

 
 

-           if (!this.headers.get('content-type')) {
-             if (typeof body === 'string') {
-               this.headers.set('content-type', 'text/plain;charset=UTF-8');
-             } else if (this._bodyBlob && this._bodyBlob.type) {
-               this.headers.set('content-type', this._bodyBlob.type);
-             } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
-               this.headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
-             }
-           }
-         };
+       var specialSchemes = {
+         ftp: 21,
+         file: null,
+         http: 80,
+         https: 443,
+         ws: 80,
+         wss: 443
+       };

 
 

-         if (support.blob) {
-           this.blob = function() {
-             var rejected = consumed(this);
-             if (rejected) {
-               return rejected
-             }
+       var isSpecial = function (url) {
+         return has$4(specialSchemes, url.scheme);
+       };

 
 

-             if (this._bodyBlob) {
-               return Promise.resolve(this._bodyBlob)
-             } else if (this._bodyArrayBuffer) {
-               return Promise.resolve(new Blob([this._bodyArrayBuffer]))
-             } else if (this._bodyFormData) {
-               throw new Error('could not read FormData body as blob')
-             } else {
-               return Promise.resolve(new Blob([this._bodyText]))
-             }
-           };
+       var includesCredentials = function (url) {
+         return url.username != '' || url.password != '';
+       };

 
 

-           this.arrayBuffer = function() {
-             if (this._bodyArrayBuffer) {
-               return consumed(this) || Promise.resolve(this._bodyArrayBuffer)
-             } else {
-               return this.blob().then(readBlobAsArrayBuffer)
-             }
-           };
-         }
+       var cannotHaveUsernamePasswordPort = function (url) {
+         return !url.host || url.cannotBeABaseURL || url.scheme == 'file';
+       };

 
 

-         this.text = function() {
-           var rejected = consumed(this);
-           if (rejected) {
-             return rejected
-           }
+       var isWindowsDriveLetter = function (string, normalized) {
+         var second;
+         return string.length == 2 && ALPHA.test(string.charAt(0))
+           && ((second = string.charAt(1)) == ':' || (!normalized && second == '|'));
+       };

 
 

-           if (this._bodyBlob) {
-             return readBlobAsText(this._bodyBlob)
-           } else if (this._bodyArrayBuffer) {
-             return Promise.resolve(readArrayBufferAsText(this._bodyArrayBuffer))
-           } else if (this._bodyFormData) {
-             throw new Error('could not read FormData body as text')
-           } else {
-             return Promise.resolve(this._bodyText)
-           }
-         };
+       var startsWithWindowsDriveLetter = function (string) {
+         var third;
+         return string.length > 1 && isWindowsDriveLetter(string.slice(0, 2)) && (
+           string.length == 2 ||
+           ((third = string.charAt(2)) === '/' || third === '\\' || third === '?' || third === '#')
+         );
+       };

 
 

-         if (support.formData) {
-           this.formData = function() {
-             return this.text().then(decode)
-           };
-         }
+       var shortenURLsPath = function (url) {
+         var path = url.path;
+         var pathSize = path.length;
+         if (pathSize && (url.scheme != 'file' || pathSize != 1 || !isWindowsDriveLetter(path[0], true))) {
+           path.pop();
+         }
+       };
+
+       var isSingleDot = function (segment) {
+         return segment === '.' || segment.toLowerCase() === '%2e';
+       };
+
+       var isDoubleDot = function (segment) {
+         segment = segment.toLowerCase();
+         return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';
+       };
+
+       // States:
+       var SCHEME_START = {};
+       var SCHEME = {};
+       var NO_SCHEME = {};
+       var SPECIAL_RELATIVE_OR_AUTHORITY = {};
+       var PATH_OR_AUTHORITY = {};
+       var RELATIVE = {};
+       var RELATIVE_SLASH = {};
+       var SPECIAL_AUTHORITY_SLASHES = {};
+       var SPECIAL_AUTHORITY_IGNORE_SLASHES = {};
+       var AUTHORITY = {};
+       var HOST = {};
+       var HOSTNAME = {};
+       var PORT = {};
+       var FILE = {};
+       var FILE_SLASH = {};
+       var FILE_HOST = {};
+       var PATH_START = {};
+       var PATH = {};
+       var CANNOT_BE_A_BASE_URL_PATH = {};
+       var QUERY = {};
+       var FRAGMENT = {};
+
+       // eslint-disable-next-line max-statements -- TODO
+       var parseURL = function (url, input, stateOverride, base) {
+         var state = stateOverride || SCHEME_START;
+         var pointer = 0;
+         var buffer = '';
+         var seenAt = false;
+         var seenBracket = false;
+         var seenPasswordToken = false;
+         var codePoints, char, bufferCodePoints, failure;
+
+         if (!stateOverride) {
+           url.scheme = '';
+           url.username = '';
+           url.password = '';
+           url.host = null;
+           url.port = null;
+           url.path = [];
+           url.query = null;
+           url.fragment = null;
+           url.cannotBeABaseURL = false;
+           input = input.replace(LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE, '');
+         }
+
+         input = input.replace(TAB_AND_NEW_LINE, '');
+
+         codePoints = arrayFrom(input);
+
+         while (pointer <= codePoints.length) {
+           char = codePoints[pointer];
+           switch (state) {
+             case SCHEME_START:
+               if (char && ALPHA.test(char)) {
+                 buffer += char.toLowerCase();
+                 state = SCHEME;
+               } else if (!stateOverride) {
+                 state = NO_SCHEME;
+                 continue;
+               } else return INVALID_SCHEME;
+               break;

 
 

-         this.json = function() {
-           return this.text().then(JSON.parse)
-         };
+             case SCHEME:
+               if (char && (ALPHANUMERIC.test(char) || char == '+' || char == '-' || char == '.')) {
+                 buffer += char.toLowerCase();
+               } else if (char == ':') {
+                 if (stateOverride && (
+                   (isSpecial(url) != has$4(specialSchemes, buffer)) ||
+                   (buffer == 'file' && (includesCredentials(url) || url.port !== null)) ||
+                   (url.scheme == 'file' && !url.host)
+                 )) return;
+                 url.scheme = buffer;
+                 if (stateOverride) {
+                   if (isSpecial(url) && specialSchemes[url.scheme] == url.port) url.port = null;
+                   return;
+                 }
+                 buffer = '';
+                 if (url.scheme == 'file') {
+                   state = FILE;
+                 } else if (isSpecial(url) && base && base.scheme == url.scheme) {
+                   state = SPECIAL_RELATIVE_OR_AUTHORITY;
+                 } else if (isSpecial(url)) {
+                   state = SPECIAL_AUTHORITY_SLASHES;
+                 } else if (codePoints[pointer + 1] == '/') {
+                   state = PATH_OR_AUTHORITY;
+                   pointer++;
+                 } else {
+                   url.cannotBeABaseURL = true;
+                   url.path.push('');
+                   state = CANNOT_BE_A_BASE_URL_PATH;
+                 }
+               } else if (!stateOverride) {
+                 buffer = '';
+                 state = NO_SCHEME;
+                 pointer = 0;
+                 continue;
+               } else return INVALID_SCHEME;
+               break;

 
 

-         return this
-       }
+             case NO_SCHEME:
+               if (!base || (base.cannotBeABaseURL && char != '#')) return INVALID_SCHEME;
+               if (base.cannotBeABaseURL && char == '#') {
+                 url.scheme = base.scheme;
+                 url.path = base.path.slice();
+                 url.query = base.query;
+                 url.fragment = '';
+                 url.cannotBeABaseURL = true;
+                 state = FRAGMENT;
+                 break;
+               }
+               state = base.scheme == 'file' ? FILE : RELATIVE;
+               continue;

 
 

-       // HTTP methods whose capitalization should be normalized
-       var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT'];
+             case SPECIAL_RELATIVE_OR_AUTHORITY:
+               if (char == '/' && codePoints[pointer + 1] == '/') {
+                 state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+                 pointer++;
+               } else {
+                 state = RELATIVE;
+                 continue;
+               } break;

 
 

-       function normalizeMethod(method) {
-         var upcased = method.toUpperCase();
-         return methods.indexOf(upcased) > -1 ? upcased : method
-       }
+             case PATH_OR_AUTHORITY:
+               if (char == '/') {
+                 state = AUTHORITY;
+                 break;
+               } else {
+                 state = PATH;
+                 continue;
+               }

 
 

-       function Request(input, options) {
-         options = options || {};
-         var body = options.body;
+             case RELATIVE:
+               url.scheme = base.scheme;
+               if (char == EOF) {
+                 url.username = base.username;
+                 url.password = base.password;
+                 url.host = base.host;
+                 url.port = base.port;
+                 url.path = base.path.slice();
+                 url.query = base.query;
+               } else if (char == '/' || (char == '\\' && isSpecial(url))) {
+                 state = RELATIVE_SLASH;
+               } else if (char == '?') {
+                 url.username = base.username;
+                 url.password = base.password;
+                 url.host = base.host;
+                 url.port = base.port;
+                 url.path = base.path.slice();
+                 url.query = '';
+                 state = QUERY;
+               } else if (char == '#') {
+                 url.username = base.username;
+                 url.password = base.password;
+                 url.host = base.host;
+                 url.port = base.port;
+                 url.path = base.path.slice();
+                 url.query = base.query;
+                 url.fragment = '';
+                 state = FRAGMENT;
+               } else {
+                 url.username = base.username;
+                 url.password = base.password;
+                 url.host = base.host;
+                 url.port = base.port;
+                 url.path = base.path.slice();
+                 url.path.pop();
+                 state = PATH;
+                 continue;
+               } break;

 
 

-         if (input instanceof Request) {
-           if (input.bodyUsed) {
-             throw new TypeError('Already read')
-           }
-           this.url = input.url;
-           this.credentials = input.credentials;
-           if (!options.headers) {
-             this.headers = new Headers(input.headers);
-           }
-           this.method = input.method;
-           this.mode = input.mode;
-           this.signal = input.signal;
-           if (!body && input._bodyInit != null) {
-             body = input._bodyInit;
-             input.bodyUsed = true;
-           }
-         } else {
-           this.url = String(input);
-         }
+             case RELATIVE_SLASH:
+               if (isSpecial(url) && (char == '/' || char == '\\')) {
+                 state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+               } else if (char == '/') {
+                 state = AUTHORITY;
+               } else {
+                 url.username = base.username;
+                 url.password = base.password;
+                 url.host = base.host;
+                 url.port = base.port;
+                 state = PATH;
+                 continue;
+               } break;

 
 

-         this.credentials = options.credentials || this.credentials || 'same-origin';
-         if (options.headers || !this.headers) {
-           this.headers = new Headers(options.headers);
-         }
-         this.method = normalizeMethod(options.method || this.method || 'GET');
-         this.mode = options.mode || this.mode || null;
-         this.signal = options.signal || this.signal;
-         this.referrer = null;
+             case SPECIAL_AUTHORITY_SLASHES:
+               state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+               if (char != '/' || buffer.charAt(pointer + 1) != '/') continue;
+               pointer++;
+               break;

 
 

-         if ((this.method === 'GET' || this.method === 'HEAD') && body) {
-           throw new TypeError('Body not allowed for GET or HEAD requests')
-         }
-         this._initBody(body);
+             case SPECIAL_AUTHORITY_IGNORE_SLASHES:
+               if (char != '/' && char != '\\') {
+                 state = AUTHORITY;
+                 continue;
+               } break;
+
+             case AUTHORITY:
+               if (char == '@') {
+                 if (seenAt) buffer = '%40' + buffer;
+                 seenAt = true;
+                 bufferCodePoints = arrayFrom(buffer);
+                 for (var i = 0; i < bufferCodePoints.length; i++) {
+                   var codePoint = bufferCodePoints[i];
+                   if (codePoint == ':' && !seenPasswordToken) {
+                     seenPasswordToken = true;
+                     continue;
+                   }
+                   var encodedCodePoints = percentEncode(codePoint, userinfoPercentEncodeSet);
+                   if (seenPasswordToken) url.password += encodedCodePoints;
+                   else url.username += encodedCodePoints;
+                 }
+                 buffer = '';
+               } else if (
+                 char == EOF || char == '/' || char == '?' || char == '#' ||
+                 (char == '\\' && isSpecial(url))
+               ) {
+                 if (seenAt && buffer == '') return INVALID_AUTHORITY;
+                 pointer -= arrayFrom(buffer).length + 1;
+                 buffer = '';
+                 state = HOST;
+               } else buffer += char;
+               break;

 
 

-         if (this.method === 'GET' || this.method === 'HEAD') {
-           if (options.cache === 'no-store' || options.cache === 'no-cache') {
-             // Search for a '_' parameter in the query string
-             var reParamSearch = /([?&])_=[^&]*/;
-             if (reParamSearch.test(this.url)) {
-               // If it already exists then set the value with the current time
-               this.url = this.url.replace(reParamSearch, '$1_=' + new Date().getTime());
-             } else {
-               // Otherwise add a new '_' parameter to the end with the current time
-               var reQueryString = /\?/;
-               this.url += (reQueryString.test(this.url) ? '&' : '?') + '_=' + new Date().getTime();
-             }
+             case HOST:
+             case HOSTNAME:
+               if (stateOverride && url.scheme == 'file') {
+                 state = FILE_HOST;
+                 continue;
+               } else if (char == ':' && !seenBracket) {
+                 if (buffer == '') return INVALID_HOST;
+                 failure = parseHost(url, buffer);
+                 if (failure) return failure;
+                 buffer = '';
+                 state = PORT;
+                 if (stateOverride == HOSTNAME) return;
+               } else if (
+                 char == EOF || char == '/' || char == '?' || char == '#' ||
+                 (char == '\\' && isSpecial(url))
+               ) {
+                 if (isSpecial(url) && buffer == '') return INVALID_HOST;
+                 if (stateOverride && buffer == '' && (includesCredentials(url) || url.port !== null)) return;
+                 failure = parseHost(url, buffer);
+                 if (failure) return failure;
+                 buffer = '';
+                 state = PATH_START;
+                 if (stateOverride) return;
+                 continue;
+               } else {
+                 if (char == '[') seenBracket = true;
+                 else if (char == ']') seenBracket = false;
+                 buffer += char;
+               } break;
+
+             case PORT:
+               if (DIGIT.test(char)) {
+                 buffer += char;
+               } else if (
+                 char == EOF || char == '/' || char == '?' || char == '#' ||
+                 (char == '\\' && isSpecial(url)) ||
+                 stateOverride
+               ) {
+                 if (buffer != '') {
+                   var port = parseInt(buffer, 10);
+                   if (port > 0xFFFF) return INVALID_PORT;
+                   url.port = (isSpecial(url) && port === specialSchemes[url.scheme]) ? null : port;
+                   buffer = '';
+                 }
+                 if (stateOverride) return;
+                 state = PATH_START;
+                 continue;
+               } else return INVALID_PORT;
+               break;
+
+             case FILE:
+               url.scheme = 'file';
+               if (char == '/' || char == '\\') state = FILE_SLASH;
+               else if (base && base.scheme == 'file') {
+                 if (char == EOF) {
+                   url.host = base.host;
+                   url.path = base.path.slice();
+                   url.query = base.query;
+                 } else if (char == '?') {
+                   url.host = base.host;
+                   url.path = base.path.slice();
+                   url.query = '';
+                   state = QUERY;
+                 } else if (char == '#') {
+                   url.host = base.host;
+                   url.path = base.path.slice();
+                   url.query = base.query;
+                   url.fragment = '';
+                   state = FRAGMENT;
+                 } else {
+                   if (!startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {
+                     url.host = base.host;
+                     url.path = base.path.slice();
+                     shortenURLsPath(url);
+                   }
+                   state = PATH;
+                   continue;
+                 }
+               } else {
+                 state = PATH;
+                 continue;
+               } break;
+
+             case FILE_SLASH:
+               if (char == '/' || char == '\\') {
+                 state = FILE_HOST;
+                 break;
+               }
+               if (base && base.scheme == 'file' && !startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {
+                 if (isWindowsDriveLetter(base.path[0], true)) url.path.push(base.path[0]);
+                 else url.host = base.host;
+               }
+               state = PATH;
+               continue;
+
+             case FILE_HOST:
+               if (char == EOF || char == '/' || char == '\\' || char == '?' || char == '#') {
+                 if (!stateOverride && isWindowsDriveLetter(buffer)) {
+                   state = PATH;
+                 } else if (buffer == '') {
+                   url.host = '';
+                   if (stateOverride) return;
+                   state = PATH_START;
+                 } else {
+                   failure = parseHost(url, buffer);
+                   if (failure) return failure;
+                   if (url.host == 'localhost') url.host = '';
+                   if (stateOverride) return;
+                   buffer = '';
+                   state = PATH_START;
+                 } continue;
+               } else buffer += char;
+               break;
+
+             case PATH_START:
+               if (isSpecial(url)) {
+                 state = PATH;
+                 if (char != '/' && char != '\\') continue;
+               } else if (!stateOverride && char == '?') {
+                 url.query = '';
+                 state = QUERY;
+               } else if (!stateOverride && char == '#') {
+                 url.fragment = '';
+                 state = FRAGMENT;
+               } else if (char != EOF) {
+                 state = PATH;
+                 if (char != '/') continue;
+               } break;
+
+             case PATH:
+               if (
+                 char == EOF || char == '/' ||
+                 (char == '\\' && isSpecial(url)) ||
+                 (!stateOverride && (char == '?' || char == '#'))
+               ) {
+                 if (isDoubleDot(buffer)) {
+                   shortenURLsPath(url);
+                   if (char != '/' && !(char == '\\' && isSpecial(url))) {
+                     url.path.push('');
+                   }
+                 } else if (isSingleDot(buffer)) {
+                   if (char != '/' && !(char == '\\' && isSpecial(url))) {
+                     url.path.push('');
+                   }
+                 } else {
+                   if (url.scheme == 'file' && !url.path.length && isWindowsDriveLetter(buffer)) {
+                     if (url.host) url.host = '';
+                     buffer = buffer.charAt(0) + ':'; // normalize windows drive letter
+                   }
+                   url.path.push(buffer);
+                 }
+                 buffer = '';
+                 if (url.scheme == 'file' && (char == EOF || char == '?' || char == '#')) {
+                   while (url.path.length > 1 && url.path[0] === '') {
+                     url.path.shift();
+                   }
+                 }
+                 if (char == '?') {
+                   url.query = '';
+                   state = QUERY;
+                 } else if (char == '#') {
+                   url.fragment = '';
+                   state = FRAGMENT;
+                 }
+               } else {
+                 buffer += percentEncode(char, pathPercentEncodeSet);
+               } break;
+
+             case CANNOT_BE_A_BASE_URL_PATH:
+               if (char == '?') {
+                 url.query = '';
+                 state = QUERY;
+               } else if (char == '#') {
+                 url.fragment = '';
+                 state = FRAGMENT;
+               } else if (char != EOF) {
+                 url.path[0] += percentEncode(char, C0ControlPercentEncodeSet);
+               } break;
+
+             case QUERY:
+               if (!stateOverride && char == '#') {
+                 url.fragment = '';
+                 state = FRAGMENT;
+               } else if (char != EOF) {
+                 if (char == "'" && isSpecial(url)) url.query += '%27';
+                 else if (char == '#') url.query += '%23';
+                 else url.query += percentEncode(char, C0ControlPercentEncodeSet);
+               } break;
+
+             case FRAGMENT:
+               if (char != EOF) url.fragment += percentEncode(char, fragmentPercentEncodeSet);
+               break;

            }
            }

+
+           pointer++;

          }
          }

-       }
+       };

 
 

-       Request.prototype.clone = function() {
-         return new Request(this, {body: this._bodyInit})
+       // `URL` constructor
+       // https://url.spec.whatwg.org/#url-class
+       var URLConstructor = function URL(url /* , base */) {
+         var that = anInstance$2(this, URLConstructor, 'URL');
+         var base = arguments.length > 1 ? arguments[1] : undefined;
+         var urlString = String(url);
+         var state = setInternalState$1(that, { type: 'URL' });
+         var baseState, failure;
+         if (base !== undefined) {
+           if (base instanceof URLConstructor) baseState = getInternalURLState(base);
+           else {
+             failure = parseURL(baseState = {}, String(base));
+             if (failure) throw TypeError(failure);
+           }
+         }
+         failure = parseURL(state, urlString, null, baseState);
+         if (failure) throw TypeError(failure);
+         var searchParams = state.searchParams = new URLSearchParams$1();
+         var searchParamsState = getInternalSearchParamsState(searchParams);
+         searchParamsState.updateSearchParams(state.query);
+         searchParamsState.updateURL = function () {
+           state.query = String(searchParams) || null;
+         };
+         if (!DESCRIPTORS$a) {
+           that.href = serializeURL.call(that);
+           that.origin = getOrigin.call(that);
+           that.protocol = getProtocol.call(that);
+           that.username = getUsername.call(that);
+           that.password = getPassword.call(that);
+           that.host = getHost.call(that);
+           that.hostname = getHostname.call(that);
+           that.port = getPort.call(that);
+           that.pathname = getPathname.call(that);
+           that.search = getSearch.call(that);
+           that.searchParams = getSearchParams.call(that);
+           that.hash = getHash.call(that);
+         }

        };
 
        };
 

-       function decode(body) {
-         var form = new FormData();
-         body
-           .trim()
-           .split('&')
-           .forEach(function(bytes) {
-             if (bytes) {
-               var split = bytes.split('=');
-               var name = split.shift().replace(/\+/g, ' ');
-               var value = split.join('=').replace(/\+/g, ' ');
-               form.append(decodeURIComponent(name), decodeURIComponent(value));
-             }
-           });
-         return form
-       }
+       var URLPrototype = URLConstructor.prototype;

 
 

-       function parseHeaders(rawHeaders) {
-         var headers = new Headers();
-         // Replace instances of \r\n and \n followed by at least one space or horizontal tab with a space
-         // https://tools.ietf.org/html/rfc7230#section-3.2
-         var preProcessedHeaders = rawHeaders.replace(/\r?\n[\t ]+/g, ' ');
-         preProcessedHeaders.split(/\r?\n/).forEach(function(line) {
-           var parts = line.split(':');
-           var key = parts.shift().trim();
-           if (key) {
-             var value = parts.join(':').trim();
-             headers.append(key, value);
+       var serializeURL = function () {
+         var url = getInternalURLState(this);
+         var scheme = url.scheme;
+         var username = url.username;
+         var password = url.password;
+         var host = url.host;
+         var port = url.port;
+         var path = url.path;
+         var query = url.query;
+         var fragment = url.fragment;
+         var output = scheme + ':';
+         if (host !== null) {
+           output += '//';
+           if (includesCredentials(url)) {
+             output += username + (password ? ':' + password : '') + '@';

            }
            }

-         });
-         return headers
-       }
-
-       Body.call(Request.prototype);
+           output += serializeHost(host);
+           if (port !== null) output += ':' + port;
+         } else if (scheme == 'file') output += '//';
+         output += url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';
+         if (query !== null) output += '?' + query;
+         if (fragment !== null) output += '#' + fragment;
+         return output;
+       };

 
 

-       function Response(bodyInit, options) {
-         if (!options) {
-           options = {};
+       var getOrigin = function () {
+         var url = getInternalURLState(this);
+         var scheme = url.scheme;
+         var port = url.port;
+         if (scheme == 'blob') try {
+           return new URLConstructor(scheme.path[0]).origin;
+         } catch (error) {
+           return 'null';

          }
          }

+         if (scheme == 'file' || !isSpecial(url)) return 'null';
+         return scheme + '://' + serializeHost(url.host) + (port !== null ? ':' + port : '');
+       };

 
 

-         this.type = 'default';
-         this.status = options.status === undefined ? 200 : options.status;
-         this.ok = this.status >= 200 && this.status < 300;
-         this.statusText = 'statusText' in options ? options.statusText : '';
-         this.headers = new Headers(options.headers);
-         this.url = options.url || '';
-         this._initBody(bodyInit);
-       }
-
-       Body.call(Response.prototype);
+       var getProtocol = function () {
+         return getInternalURLState(this).scheme + ':';
+       };

 
 

-       Response.prototype.clone = function() {
-         return new Response(this._bodyInit, {
-           status: this.status,
-           statusText: this.statusText,
-           headers: new Headers(this.headers),
-           url: this.url
-         })
+       var getUsername = function () {
+         return getInternalURLState(this).username;

        };
 
        };
 

-       Response.error = function() {
-         var response = new Response(null, {status: 0, statusText: ''});
-         response.type = 'error';
-         return response
+       var getPassword = function () {
+         return getInternalURLState(this).password;

        };
 
        };
 

-       var redirectStatuses = [301, 302, 303, 307, 308];
+       var getHost = function () {
+         var url = getInternalURLState(this);
+         var host = url.host;
+         var port = url.port;
+         return host === null ? ''
+           : port === null ? serializeHost(host)
+           : serializeHost(host) + ':' + port;
+       };

 
 

-       Response.redirect = function(url, status) {
-         if (redirectStatuses.indexOf(status) === -1) {
-           throw new RangeError('Invalid status code')
-         }
+       var getHostname = function () {
+         var host = getInternalURLState(this).host;
+         return host === null ? '' : serializeHost(host);
+       };

 
 

-         return new Response(null, {status: status, headers: {location: url}})
+       var getPort = function () {
+         var port = getInternalURLState(this).port;
+         return port === null ? '' : String(port);

        };
 
        };
 

-       var DOMException$1 = global$1.DOMException;
+       var getPathname = function () {
+         var url = getInternalURLState(this);
+         var path = url.path;
+         return url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';
+       };

 
 

-       if (typeof DOMException$1 !== 'function') {
-         DOMException$1 = function(message, name) {
-           this.message = message;
-           this.name = name;
-           var error = Error(message);
-           this.stack = error.stack;
-         };
-         DOMException$1.prototype = Object.create(Error.prototype);
-         DOMException$1.prototype.constructor = DOMException$1;
-       }
+       var getSearch = function () {
+         var query = getInternalURLState(this).query;
+         return query ? '?' + query : '';
+       };

 
 

-       function fetch$1(input, init) {
-         return new Promise(function(resolve, reject) {
-           var request = new Request(input, init);
+       var getSearchParams = function () {
+         return getInternalURLState(this).searchParams;
+       };

 
 

-           if (request.signal && request.signal.aborted) {
-             return reject(new DOMException$1('Aborted', 'AbortError'))
-           }
+       var getHash = function () {
+         var fragment = getInternalURLState(this).fragment;
+         return fragment ? '#' + fragment : '';
+       };

 
 

-           var xhr = new XMLHttpRequest();
+       var accessorDescriptor = function (getter, setter) {
+         return { get: getter, set: setter, configurable: true, enumerable: true };
+       };

 
 

-           function abortXhr() {
-             xhr.abort();
-           }
+       if (DESCRIPTORS$a) {
+         defineProperties$1(URLPrototype, {
+           // `URL.prototype.href` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-href
+           href: accessorDescriptor(serializeURL, function (href) {
+             var url = getInternalURLState(this);
+             var urlString = String(href);
+             var failure = parseURL(url, urlString);
+             if (failure) throw TypeError(failure);
+             getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);
+           }),
+           // `URL.prototype.origin` getter
+           // https://url.spec.whatwg.org/#dom-url-origin
+           origin: accessorDescriptor(getOrigin),
+           // `URL.prototype.protocol` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-protocol
+           protocol: accessorDescriptor(getProtocol, function (protocol) {
+             var url = getInternalURLState(this);
+             parseURL(url, String(protocol) + ':', SCHEME_START);
+           }),
+           // `URL.prototype.username` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-username
+           username: accessorDescriptor(getUsername, function (username) {
+             var url = getInternalURLState(this);
+             var codePoints = arrayFrom(String(username));
+             if (cannotHaveUsernamePasswordPort(url)) return;
+             url.username = '';
+             for (var i = 0; i < codePoints.length; i++) {
+               url.username += percentEncode(codePoints[i], userinfoPercentEncodeSet);
+             }
+           }),
+           // `URL.prototype.password` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-password
+           password: accessorDescriptor(getPassword, function (password) {
+             var url = getInternalURLState(this);
+             var codePoints = arrayFrom(String(password));
+             if (cannotHaveUsernamePasswordPort(url)) return;
+             url.password = '';
+             for (var i = 0; i < codePoints.length; i++) {
+               url.password += percentEncode(codePoints[i], userinfoPercentEncodeSet);
+             }
+           }),
+           // `URL.prototype.host` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-host
+           host: accessorDescriptor(getHost, function (host) {
+             var url = getInternalURLState(this);
+             if (url.cannotBeABaseURL) return;
+             parseURL(url, String(host), HOST);
+           }),
+           // `URL.prototype.hostname` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-hostname
+           hostname: accessorDescriptor(getHostname, function (hostname) {
+             var url = getInternalURLState(this);
+             if (url.cannotBeABaseURL) return;
+             parseURL(url, String(hostname), HOSTNAME);
+           }),
+           // `URL.prototype.port` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-port
+           port: accessorDescriptor(getPort, function (port) {
+             var url = getInternalURLState(this);
+             if (cannotHaveUsernamePasswordPort(url)) return;
+             port = String(port);
+             if (port == '') url.port = null;
+             else parseURL(url, port, PORT);
+           }),
+           // `URL.prototype.pathname` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-pathname
+           pathname: accessorDescriptor(getPathname, function (pathname) {
+             var url = getInternalURLState(this);
+             if (url.cannotBeABaseURL) return;
+             url.path = [];
+             parseURL(url, pathname + '', PATH_START);
+           }),
+           // `URL.prototype.search` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-search
+           search: accessorDescriptor(getSearch, function (search) {
+             var url = getInternalURLState(this);
+             search = String(search);
+             if (search == '') {
+               url.query = null;
+             } else {
+               if ('?' == search.charAt(0)) search = search.slice(1);
+               url.query = '';
+               parseURL(url, search, QUERY);
+             }
+             getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);
+           }),
+           // `URL.prototype.searchParams` getter
+           // https://url.spec.whatwg.org/#dom-url-searchparams
+           searchParams: accessorDescriptor(getSearchParams),
+           // `URL.prototype.hash` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-hash
+           hash: accessorDescriptor(getHash, function (hash) {
+             var url = getInternalURLState(this);
+             hash = String(hash);
+             if (hash == '') {
+               url.fragment = null;
+               return;
+             }
+             if ('#' == hash.charAt(0)) hash = hash.slice(1);
+             url.fragment = '';
+             parseURL(url, hash, FRAGMENT);
+           })
+         });
+       }

 
 

-           xhr.onload = function() {
-             var options = {
-               status: xhr.status,
-               statusText: xhr.statusText,
-               headers: parseHeaders(xhr.getAllResponseHeaders() || '')
-             };
-             options.url = 'responseURL' in xhr ? xhr.responseURL : options.headers.get('X-Request-URL');
-             var body = 'response' in xhr ? xhr.response : xhr.responseText;
-             setTimeout(function() {
-               resolve(new Response(body, options));
-             }, 0);
-           };
+       // `URL.prototype.toJSON` method
+       // https://url.spec.whatwg.org/#dom-url-tojson
+       redefine$6(URLPrototype, 'toJSON', function toJSON() {
+         return serializeURL.call(this);
+       }, { enumerable: true });
+
+       // `URL.prototype.toString` method
+       // https://url.spec.whatwg.org/#URL-stringification-behavior
+       redefine$6(URLPrototype, 'toString', function toString() {
+         return serializeURL.call(this);
+       }, { enumerable: true });
+
+       if (NativeURL) {
+         var nativeCreateObjectURL = NativeURL.createObjectURL;
+         var nativeRevokeObjectURL = NativeURL.revokeObjectURL;
+         // `URL.createObjectURL` method
+         // https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         if (nativeCreateObjectURL) redefine$6(URLConstructor, 'createObjectURL', function createObjectURL(blob) {
+           return nativeCreateObjectURL.apply(NativeURL, arguments);
+         });
+         // `URL.revokeObjectURL` method
+         // https://developer.mozilla.org/en-US/docs/Web/API/URL/revokeObjectURL
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         if (nativeRevokeObjectURL) redefine$6(URLConstructor, 'revokeObjectURL', function revokeObjectURL(url) {
+           return nativeRevokeObjectURL.apply(NativeURL, arguments);
+         });
+       }

 
 

-           xhr.onerror = function() {
-             setTimeout(function() {
-               reject(new TypeError('Network request failed'));
-             }, 0);
-           };
+       setToStringTag$3(URLConstructor, 'URL');

 
 

-           xhr.ontimeout = function() {
-             setTimeout(function() {
-               reject(new TypeError('Network request failed'));
-             }, 0);
-           };
+       $$Q({ global: true, forced: !USE_NATIVE_URL, sham: !DESCRIPTORS$a }, {
+         URL: URLConstructor
+       });

 
 

-           xhr.onabort = function() {
-             setTimeout(function() {
-               reject(new DOMException$1('Aborted', 'AbortError'));
-             }, 0);
-           };
+       var anObject$7 = anObject$m;
+
+       // `RegExp.prototype.flags` getter implementation
+       // https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
+       var regexpFlags$1 = function () {
+         var that = anObject$7(this);
+         var result = '';
+         if (that.global) result += 'g';
+         if (that.ignoreCase) result += 'i';
+         if (that.multiline) result += 'm';
+         if (that.dotAll) result += 's';
+         if (that.unicode) result += 'u';
+         if (that.sticky) result += 'y';
+         return result;
+       };

 
 

-           function fixUrl(url) {
-             try {
-               return url === '' && global$1.location.href ? global$1.location.href : url
-             } catch (e) {
-               return url
-             }
-           }
+       var redefine$5 = redefine$g.exports;
+       var anObject$6 = anObject$m;
+       var fails$q = fails$N;
+       var flags = regexpFlags$1;

 
 

-           xhr.open(request.method, fixUrl(request.url), true);
+       var TO_STRING = 'toString';
+       var RegExpPrototype$2 = RegExp.prototype;
+       var nativeToString = RegExpPrototype$2[TO_STRING];

 
 

-           if (request.credentials === 'include') {
-             xhr.withCredentials = true;
-           } else if (request.credentials === 'omit') {
-             xhr.withCredentials = false;
-           }
+       var NOT_GENERIC = fails$q(function () { return nativeToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
+       // FF44- RegExp#toString has a wrong name
+       var INCORRECT_NAME = nativeToString.name != TO_STRING;

 
 

-           if ('responseType' in xhr) {
-             if (support.blob) {
-               xhr.responseType = 'blob';
-             } else if (
-               support.arrayBuffer &&
-               request.headers.get('Content-Type') &&
-               request.headers.get('Content-Type').indexOf('application/octet-stream') !== -1
-             ) {
-               xhr.responseType = 'arraybuffer';
-             }
-           }
+       // `RegExp.prototype.toString` method
+       // https://tc39.es/ecma262/#sec-regexp.prototype.tostring
+       if (NOT_GENERIC || INCORRECT_NAME) {
+         redefine$5(RegExp.prototype, TO_STRING, function toString() {
+           var R = anObject$6(this);
+           var p = String(R.source);
+           var rf = R.flags;
+           var f = String(rf === undefined && R instanceof RegExp && !('flags' in RegExpPrototype$2) ? flags.call(R) : rf);
+           return '/' + p + '/' + f;
+         }, { unsafe: true });
+       }

 
 

-           request.headers.forEach(function(value, name) {
-             xhr.setRequestHeader(name, value);
-           });
+       var regexpStickyHelpers = {};

 
 

-           if (request.signal) {
-             request.signal.addEventListener('abort', abortXhr);
+       var fails$p = fails$N;

 
 

-             xhr.onreadystatechange = function() {
-               // DONE (success or failure)
-               if (xhr.readyState === 4) {
-                 request.signal.removeEventListener('abort', abortXhr);
-               }
-             };
-           }
+       // babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError,
+       var RE = function (s, f) {
+         return RegExp(s, f);
+       };

 
 

-           xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit);
-         })
-       }
+       regexpStickyHelpers.UNSUPPORTED_Y = fails$p(function () {
+         var re = RE('a', 'y');
+         re.lastIndex = 2;
+         return re.exec('abcd') != null;
+       });

 
 

-       fetch$1.polyfill = true;
+       regexpStickyHelpers.BROKEN_CARET = fails$p(function () {
+         // https://bugzilla.mozilla.org/show_bug.cgi?id=773687
+         var re = RE('^r', 'gy');
+         re.lastIndex = 2;
+         return re.exec('str') != null;
+       });

 
 

-       if (!global$1.fetch) {
-         global$1.fetch = fetch$1;
-         global$1.Headers = Headers;
-         global$1.Request = Request;
-         global$1.Response = Response;
-       }
+       var fails$o = fails$N;

 
 

-       var lib = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
+       var regexpUnsupportedDotAll = fails$o(function () {
+         // babel-minify transpiles RegExp('.', 's') -> /./s and it causes SyntaxError
+         var re = RegExp('.', (typeof '').charAt(0));
+         return !(re.dotAll && re.exec('\n') && re.flags === 's');
+       });

 
 

+       var fails$n = fails$N;

 
 

+       var regexpUnsupportedNcg = fails$n(function () {
+         // babel-minify transpiles RegExp('.', 'g') -> /./g and it causes SyntaxError
+         var re = RegExp('(?<a>b)', (typeof '').charAt(5));
+         return re.exec('b').groups.a !== 'b' ||
+           'b'.replace(re, '$<a>c') !== 'bc';
+       });

 
 

+       /* eslint-disable regexp/no-assertion-capturing-group, regexp/no-empty-group, regexp/no-lazy-ends -- testing */
+       /* eslint-disable regexp/no-useless-quantifier -- testing */
+       var regexpFlags = regexpFlags$1;
+       var stickyHelpers$2 = regexpStickyHelpers;
+       var shared = shared$5.exports;
+       var create$7 = objectCreate;
+       var getInternalState = internalState.get;
+       var UNSUPPORTED_DOT_ALL$1 = regexpUnsupportedDotAll;
+       var UNSUPPORTED_NCG$1 = regexpUnsupportedNcg;
+
+       var nativeExec = RegExp.prototype.exec;
+       var nativeReplace = shared('native-string-replace', String.prototype.replace);
+
+       var patchedExec = nativeExec;
+
+       var UPDATES_LAST_INDEX_WRONG = (function () {
+         var re1 = /a/;
+         var re2 = /b*/g;
+         nativeExec.call(re1, 'a');
+         nativeExec.call(re2, 'a');
+         return re1.lastIndex !== 0 || re2.lastIndex !== 0;
+       })();

 
 

+       var UNSUPPORTED_Y$2 = stickyHelpers$2.UNSUPPORTED_Y || stickyHelpers$2.BROKEN_CARET;

 
 

+       // nonparticipating capturing group, copied from es5-shim's String#split patch.
+       var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;

 
 

+       var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y$2 || UNSUPPORTED_DOT_ALL$1 || UNSUPPORTED_NCG$1;

 
 

+       if (PATCH) {
+         // eslint-disable-next-line max-statements -- TODO
+         patchedExec = function exec(str) {
+           var re = this;
+           var state = getInternalState(re);
+           var raw = state.raw;
+           var result, reCopy, lastIndex, match, i, object, group;

 
 

+           if (raw) {
+             raw.lastIndex = re.lastIndex;
+             result = patchedExec.call(raw, str);
+             re.lastIndex = raw.lastIndex;
+             return result;
+           }

 
 

+           var groups = state.groups;
+           var sticky = UNSUPPORTED_Y$2 && re.sticky;
+           var flags = regexpFlags.call(re);
+           var source = re.source;
+           var charsAdded = 0;
+           var strCopy = str;

 
 

-       if (!window.Set) {
-           window.Set = es6Set;
-       }
-       if (!window.Map) {
-           window.Map = es6Map;
-       }
-       if (!window.Promise) {
-           window.Promise = polyfill$e;
-           window.Promise._immediateFn = setAsap;
-       }
-       if (!Array.prototype.find) {
-           array_prototype_find.shim();
-       }
-       if (!Array.prototype.findIndex) {
-           array_prototype_findindex.shim();
-       }
-       if (!Array.from) {
-           array_from.shim();
-       }
-       if (!Object.values) {
-           object_values.shim();
-       }
-       if (!Object.assign) {
-           object_assign.shim();
-       }
-       if (!window.requestAnimationFrame || !window.cancelAnimationFrame) {
-           window.requestAnimationFrame = raf_1;
-           window.cancelAnimationFrame = raf_1.cancel;
-       }
+           if (sticky) {
+             flags = flags.replace('y', '');
+             if (flags.indexOf('g') === -1) {
+               flags += 'g';
+             }

 
 

-       var finalFetch = window.fetch;
-       var finalPromise = window.Promise;
-       window.fetch = function (input, init) {
-           try {
-               return finalFetch(input, init);
-           }
-           catch (error) {
-               return new finalPromise(function (_, reject) { return reject(error); });
+             strCopy = String(str).slice(re.lastIndex);
+             // Support anchored sticky behavior.
+             if (re.lastIndex > 0 && (!re.multiline || re.multiline && str[re.lastIndex - 1] !== '\n')) {
+               source = '(?: ' + source + ')';
+               strCopy = ' ' + strCopy;
+               charsAdded++;
+             }
+             // ^(? + rx + ) is needed, in combination with some str slicing, to
+             // simulate the 'y' flag.
+             reCopy = new RegExp('^(?:' + source + ')', flags);

            }
            }

-       };
-       });
-
-       var $Math$2 = GetIntrinsic('%Math%');

 
 

-       var $floor$1 = $Math$2.floor;
-       var $abs$1 = $Math$2.abs;
+           if (NPCG_INCLUDED) {
+             reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
+           }
+           if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;

 
 

+           match = nativeExec.call(sticky ? reCopy : re, strCopy);

 
 

+           if (sticky) {
+             if (match) {
+               match.input = match.input.slice(charsAdded);
+               match[0] = match[0].slice(charsAdded);
+               match.index = re.lastIndex;
+               re.lastIndex += match[0].length;
+             } else re.lastIndex = 0;
+           } else if (UPDATES_LAST_INDEX_WRONG && match) {
+             re.lastIndex = re.global ? match.index + match[0].length : lastIndex;
+           }
+           if (NPCG_INCLUDED && match && match.length > 1) {
+             // Fix browsers whose `exec` methods don't consistently return `undefined`
+             // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/
+             nativeReplace.call(match[0], reCopy, function () {
+               for (i = 1; i < arguments.length - 2; i++) {
+                 if (arguments[i] === undefined) match[i] = undefined;
+               }
+             });
+           }

 
 

+           if (match && groups) {
+             match.groups = object = create$7(null);
+             for (i = 0; i < groups.length; i++) {
+               group = groups[i];
+               object[group[0]] = match[group[1]];
+             }
+           }

 
 

-       // https://www.ecma-international.org/ecma-262/6.0/#sec-isinteger
+           return match;
+         };
+       }

 
 

-       var IsInteger = function IsInteger(argument) {
-               if (typeof argument !== 'number' || _isNaN(argument) || !_isFinite(argument)) {
-                       return false;
-               }
-               var abs = $abs$1(argument);
-               return $floor$1(abs) === abs;
-       };
+       var regexpExec$3 = patchedExec;

 
 

-       var ArrayPush = callBound('Array.prototype.push');
-       var StringFromCharCodeSpread = callBind.apply(String.fromCharCode, null);
-
-       var implementation$8 = function fromCodePoint(_ /* fromCodePoint.length is 1 */) {
-               var arguments$1 = arguments;
-
-               var MAX_SIZE = 0x4000;
-               var codeUnits = [];
-               var highSurrogate;
-               var lowSurrogate;
-               var index = -1;
-               var length = arguments.length;
-               if (!length) {
-                       return '';
-               }
-               var result = '';
-               while (++index < length) {
-                       var codePoint = ToNumber$1(arguments$1[index]);
-                       if (
-                               !IsInteger(codePoint) ||
-                               codePoint < 0 || codePoint > 0x10FFFF // not a valid Unicode code point
-                       ) {
-                               throw RangeError('Invalid code point: ' + codePoint);
-                       }
-                       if (codePoint <= 0xFFFF) { // BMP code point
-                               ArrayPush(codeUnits, codePoint);
-                       } else { // Astral code point; split in surrogate halves
-                               // https://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae
-                               codePoint -= 0x10000;
-                               highSurrogate = (codePoint >> 10) + 0xD800;
-                               lowSurrogate = (codePoint % 0x400) + 0xDC00;
-                               ArrayPush(codeUnits, highSurrogate, lowSurrogate);
-                       }
-                       if (index + 1 == length || codeUnits.length > MAX_SIZE) {
-                               result += StringFromCharCodeSpread(codeUnits);
-                               codeUnits.length = 0;
-                       }
-               }
-               return result;
-       };
+       var $$P = _export;
+       var exec = regexpExec$3;

 
 

-       var polyfill$g = function getPolyfill() {
-               return String.fromCodePoint || implementation$8;
-       };
+       // `RegExp.prototype.exec` method
+       // https://tc39.es/ecma262/#sec-regexp.prototype.exec
+       $$P({ target: 'RegExp', proto: true, forced: /./.exec !== exec }, {
+         exec: exec
+       });

 
 

-       var shim$d = function shimFromCodePoint() {
-               var polyfill = polyfill$g();
+       // TODO: Remove from `core-js@4` since it's moved to entry points

 
 

-               if (String.fromCodePoint !== polyfill) {
-                       defineProperties_1(String, { fromCodePoint: polyfill });
-               }
+       var redefine$4 = redefine$g.exports;
+       var regexpExec$2 = regexpExec$3;
+       var fails$m = fails$N;
+       var wellKnownSymbol$5 = wellKnownSymbol$s;
+       var createNonEnumerableProperty$1 = createNonEnumerableProperty$e;

 
 

-               return polyfill;
-       };
+       var SPECIES = wellKnownSymbol$5('species');
+       var RegExpPrototype$1 = RegExp.prototype;

 
 

-       /*! https://mths.be/fromcodepoint v1.0.0 by @mathias */
+       var fixRegexpWellKnownSymbolLogic = function (KEY, exec, FORCED, SHAM) {
+         var SYMBOL = wellKnownSymbol$5(KEY);

 
 

-       shim$d();
+         var DELEGATES_TO_SYMBOL = !fails$m(function () {
+           // String methods call symbol-named RegEp methods
+           var O = {};
+           O[SYMBOL] = function () { return 7; };
+           return ''[KEY](O) != 7;
+         });

 
 

-       (function (factory) {
-         
-         factory();
-       }((function () {
-         function _classCallCheck(instance, Constructor) {
-           if (!(instance instanceof Constructor)) {
-             throw new TypeError("Cannot call a class as a function");
-           }
-         }
+         var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails$m(function () {
+           // Symbol-named RegExp methods call .exec
+           var execCalled = false;
+           var re = /a/;

 
 

-         function _defineProperties(target, props) {
-           for (var i = 0; i < props.length; i++) {
-             var descriptor = props[i];
-             descriptor.enumerable = descriptor.enumerable || false;
-             descriptor.configurable = true;
-             if ("value" in descriptor) { descriptor.writable = true; }
-             Object.defineProperty(target, descriptor.key, descriptor);
+           if (KEY === 'split') {
+             // We can't use real regex here since it causes deoptimization
+             // and serious performance degradation in V8
+             // https://github.com/zloirock/core-js/issues/306
+             re = {};
+             // RegExp[@@split] doesn't call the regex's exec method, but first creates
+             // a new one. We need to return the patched regex when creating the new one.
+             re.constructor = {};
+             re.constructor[SPECIES] = function () { return re; };
+             re.flags = '';
+             re[SYMBOL] = /./[SYMBOL];

            }
            }

-         }

 
 

-         function _createClass(Constructor, protoProps, staticProps) {
-           if (protoProps) { _defineProperties(Constructor.prototype, protoProps); }
-           if (staticProps) { _defineProperties(Constructor, staticProps); }
-           return Constructor;
-         }
+           re.exec = function () { execCalled = true; return null; };

 
 

-         function _inherits(subClass, superClass) {
-           if (typeof superClass !== "function" && superClass !== null) {
-             throw new TypeError("Super expression must either be null or a function");
-           }
+           re[SYMBOL]('');
+           return !execCalled;
+         });

 
 

-           subClass.prototype = Object.create(superClass && superClass.prototype, {
-             constructor: {
-               value: subClass,
-               writable: true,
-               configurable: true
+         if (
+           !DELEGATES_TO_SYMBOL ||
+           !DELEGATES_TO_EXEC ||
+           FORCED
+         ) {
+           var nativeRegExpMethod = /./[SYMBOL];
+           var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {
+             var $exec = regexp.exec;
+             if ($exec === regexpExec$2 || $exec === RegExpPrototype$1.exec) {
+               if (DELEGATES_TO_SYMBOL && !forceStringMethod) {
+                 // The native String method already delegates to @@method (this
+                 // polyfilled function), leasing to infinite recursion.
+                 // We avoid it by directly calling the native @@method method.
+                 return { done: true, value: nativeRegExpMethod.call(regexp, str, arg2) };
+               }
+               return { done: true, value: nativeMethod.call(str, regexp, arg2) };

              }
              }

+             return { done: false };

            });
            });

-           if (superClass) { _setPrototypeOf(subClass, superClass); }
-         }

 
 

-         function _getPrototypeOf(o) {
-           _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
-             return o.__proto__ || Object.getPrototypeOf(o);
-           };
-           return _getPrototypeOf(o);
+           redefine$4(String.prototype, KEY, methods[0]);
+           redefine$4(RegExpPrototype$1, SYMBOL, methods[1]);

          }
 
          }
 

-         function _setPrototypeOf(o, p) {
-           _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
-             o.__proto__ = p;
-             return o;
-           };
+         if (SHAM) createNonEnumerableProperty$1(RegExpPrototype$1[SYMBOL], 'sham', true);
+       };

 
 

-           return _setPrototypeOf(o, p);
-         }
+       var charAt = stringMultibyte.charAt;

 
 

-         function _assertThisInitialized(self) {
-           if (self === void 0) {
-             throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
-           }
+       // `AdvanceStringIndex` abstract operation
+       // https://tc39.es/ecma262/#sec-advancestringindex
+       var advanceStringIndex$3 = function (S, index, unicode) {
+         return index + (unicode ? charAt(S, index).length : 1);
+       };

 
 

-           return self;
-         }
+       var toObject$6 = toObject$i;

 
 

-         function _possibleConstructorReturn(self, call) {
-           if (call && (typeof call === "object" || typeof call === "function")) {
-             return call;
-           }
+       var floor$1 = Math.floor;
+       var replace = ''.replace;
+       var SUBSTITUTION_SYMBOLS = /\$([$&'`]|\d{1,2}|<[^>]*>)/g;
+       var SUBSTITUTION_SYMBOLS_NO_NAMED = /\$([$&'`]|\d{1,2})/g;

 
 

-           return _assertThisInitialized(self);
+       // `GetSubstitution` abstract operation
+       // https://tc39.es/ecma262/#sec-getsubstitution
+       var getSubstitution$1 = function (matched, str, position, captures, namedCaptures, replacement) {
+         var tailPos = position + matched.length;
+         var m = captures.length;
+         var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;
+         if (namedCaptures !== undefined) {
+           namedCaptures = toObject$6(namedCaptures);
+           symbols = SUBSTITUTION_SYMBOLS;

          }
          }

+         return replace.call(replacement, symbols, function (match, ch) {
+           var capture;
+           switch (ch.charAt(0)) {
+             case '$': return '$';
+             case '&': return matched;
+             case '`': return str.slice(0, position);
+             case "'": return str.slice(tailPos);
+             case '<':
+               capture = namedCaptures[ch.slice(1, -1)];
+               break;
+             default: // \d\d?
+               var n = +ch;
+               if (n === 0) return match;
+               if (n > m) {
+                 var f = floor$1(n / 10);
+                 if (f === 0) return match;
+                 if (f <= m) return captures[f - 1] === undefined ? ch.charAt(1) : captures[f - 1] + ch.charAt(1);
+                 return match;
+               }
+               capture = captures[n - 1];
+           }
+           return capture === undefined ? '' : capture;
+         });
+       };

 
 

-         function _superPropBase(object, property) {
-           while (!Object.prototype.hasOwnProperty.call(object, property)) {
-             object = _getPrototypeOf(object);
-             if (object === null) { break; }
+       var classof$3 = classofRaw$1;
+       var regexpExec$1 = regexpExec$3;
+
+       // `RegExpExec` abstract operation
+       // https://tc39.es/ecma262/#sec-regexpexec
+       var regexpExecAbstract = function (R, S) {
+         var exec = R.exec;
+         if (typeof exec === 'function') {
+           var result = exec.call(R, S);
+           if (typeof result !== 'object') {
+             throw TypeError('RegExp exec method returned something other than an Object or null');

            }
            }

+           return result;
+         }

 
 

-           return object;
+         if (classof$3(R) !== 'RegExp') {
+           throw TypeError('RegExp#exec called on incompatible receiver');

          }
 
          }
 

-         function _get(target, property, receiver) {
-           if (typeof Reflect !== "undefined" && Reflect.get) {
-             _get = Reflect.get;
-           } else {
-             _get = function _get(target, property, receiver) {
-               var base = _superPropBase(target, property);
+         return regexpExec$1.call(R, S);
+       };

 
 

-               if (!base) { return; }
-               var desc = Object.getOwnPropertyDescriptor(base, property);
+       var fixRegExpWellKnownSymbolLogic$3 = fixRegexpWellKnownSymbolLogic;
+       var fails$l = fails$N;
+       var anObject$5 = anObject$m;
+       var toLength$8 = toLength$q;
+       var toInteger$3 = toInteger$b;
+       var requireObjectCoercible$a = requireObjectCoercible$e;
+       var advanceStringIndex$2 = advanceStringIndex$3;
+       var getSubstitution = getSubstitution$1;
+       var regExpExec$2 = regexpExecAbstract;
+       var wellKnownSymbol$4 = wellKnownSymbol$s;

 
 

-               if (desc.get) {
-                 return desc.get.call(receiver);
-               }
+       var REPLACE = wellKnownSymbol$4('replace');
+       var max$2 = Math.max;
+       var min$5 = Math.min;

 
 

-               return desc.value;
-             };
-           }
+       var maybeToString = function (it) {
+         return it === undefined ? it : String(it);
+       };

 
 

-           return _get(target, property, receiver || target);
+       // IE <= 11 replaces $0 with the whole match, as if it was $&
+       // https://stackoverflow.com/questions/6024666/getting-ie-to-replace-a-regex-with-the-literal-string-0
+       var REPLACE_KEEPS_$0 = (function () {
+         // eslint-disable-next-line regexp/prefer-escape-replacement-dollar-char -- required for testing
+         return 'a'.replace(/./, '$0') === '$0';
+       })();
+
+       // Safari <= 13.0.3(?) substitutes nth capture where n>m with an empty string
+       var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = (function () {
+         if (/./[REPLACE]) {
+           return /./[REPLACE]('a', '$0') === '';

          }
          }

+         return false;
+       })();

 
 

-         var Emitter =
-         /*#__PURE__*/
-         function () {
-           function Emitter() {
-             _classCallCheck(this, Emitter);
+       var REPLACE_SUPPORTS_NAMED_GROUPS = !fails$l(function () {
+         var re = /./;
+         re.exec = function () {
+           var result = [];
+           result.groups = { a: '7' };
+           return result;
+         };
+         return ''.replace(re, '$<a>') !== '7';
+       });

 
 

-             Object.defineProperty(this, 'listeners', {
-               value: {},
-               writable: true,
-               configurable: true
-             });
-           }
+       // @@replace logic
+       fixRegExpWellKnownSymbolLogic$3('replace', function (_, nativeReplace, maybeCallNative) {
+         var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';

 
 

-           _createClass(Emitter, [{
-             key: "addEventListener",
-             value: function addEventListener(type, callback) {
-               if (!(type in this.listeners)) {
-                 this.listeners[type] = [];
-               }
+         return [
+           // `String.prototype.replace` method
+           // https://tc39.es/ecma262/#sec-string.prototype.replace
+           function replace(searchValue, replaceValue) {
+             var O = requireObjectCoercible$a(this);
+             var replacer = searchValue == undefined ? undefined : searchValue[REPLACE];
+             return replacer !== undefined
+               ? replacer.call(searchValue, O, replaceValue)
+               : nativeReplace.call(String(O), searchValue, replaceValue);
+           },
+           // `RegExp.prototype[@@replace]` method
+           // https://tc39.es/ecma262/#sec-regexp.prototype-@@replace
+           function (string, replaceValue) {
+             if (
+               typeof replaceValue === 'string' &&
+               replaceValue.indexOf(UNSAFE_SUBSTITUTE) === -1 &&
+               replaceValue.indexOf('$<') === -1
+             ) {
+               var res = maybeCallNative(nativeReplace, this, string, replaceValue);
+               if (res.done) return res.value;
+             }
+
+             var rx = anObject$5(this);
+             var S = String(string);
+
+             var functionalReplace = typeof replaceValue === 'function';
+             if (!functionalReplace) replaceValue = String(replaceValue);

 
 

-               this.listeners[type].push(callback);
+             var global = rx.global;
+             if (global) {
+               var fullUnicode = rx.unicode;
+               rx.lastIndex = 0;

              }
              }

-           }, {
-             key: "removeEventListener",
-             value: function removeEventListener(type, callback) {
-               if (!(type in this.listeners)) {
-                 return;
-               }
+             var results = [];
+             while (true) {
+               var result = regExpExec$2(rx, S);
+               if (result === null) break;

 
 

-               var stack = this.listeners[type];
+               results.push(result);
+               if (!global) break;

 
 

-               for (var i = 0, l = stack.length; i < l; i++) {
-                 if (stack[i] === callback) {
-                   stack.splice(i, 1);
-                   return;
-                 }
-               }
+               var matchStr = String(result[0]);
+               if (matchStr === '') rx.lastIndex = advanceStringIndex$2(S, toLength$8(rx.lastIndex), fullUnicode);

              }
              }

-           }, {
-             key: "dispatchEvent",
-             value: function dispatchEvent(event) {
-               var _this = this;

 
 

-               if (!(event.type in this.listeners)) {
-                 return;
+             var accumulatedResult = '';
+             var nextSourcePosition = 0;
+             for (var i = 0; i < results.length; i++) {
+               result = results[i];
+
+               var matched = String(result[0]);
+               var position = max$2(min$5(toInteger$3(result.index), S.length), 0);
+               var captures = [];
+               // NOTE: This is equivalent to
+               //   captures = result.slice(1).map(maybeToString)
+               // but for some reason `nativeSlice.call(result, 1, result.length)` (called in
+               // the slice polyfill when slicing native arrays) "doesn't work" in safari 9 and
+               // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.
+               for (var j = 1; j < result.length; j++) captures.push(maybeToString(result[j]));
+               var namedCaptures = result.groups;
+               if (functionalReplace) {
+                 var replacerArgs = [matched].concat(captures, position, S);
+                 if (namedCaptures !== undefined) replacerArgs.push(namedCaptures);
+                 var replacement = String(replaceValue.apply(undefined, replacerArgs));
+               } else {
+                 replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);

                }
                }

+               if (position >= nextSourcePosition) {
+                 accumulatedResult += S.slice(nextSourcePosition, position) + replacement;
+                 nextSourcePosition = position + matched.length;
+               }
+             }
+             return accumulatedResult + S.slice(nextSourcePosition);
+           }
+         ];
+       }, !REPLACE_SUPPORTS_NAMED_GROUPS || !REPLACE_KEEPS_$0 || REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE);
+
+       var isObject$b = isObject$r;
+       var classof$2 = classofRaw$1;
+       var wellKnownSymbol$3 = wellKnownSymbol$s;
+
+       var MATCH$2 = wellKnownSymbol$3('match');
+
+       // `IsRegExp` abstract operation
+       // https://tc39.es/ecma262/#sec-isregexp
+       var isRegexp = function (it) {
+         var isRegExp;
+         return isObject$b(it) && ((isRegExp = it[MATCH$2]) !== undefined ? !!isRegExp : classof$2(it) == 'RegExp');
+       };
+
+       var fixRegExpWellKnownSymbolLogic$2 = fixRegexpWellKnownSymbolLogic;
+       var isRegExp$2 = isRegexp;
+       var anObject$4 = anObject$m;
+       var requireObjectCoercible$9 = requireObjectCoercible$e;
+       var speciesConstructor$1 = speciesConstructor$8;
+       var advanceStringIndex$1 = advanceStringIndex$3;
+       var toLength$7 = toLength$q;
+       var callRegExpExec = regexpExecAbstract;
+       var regexpExec = regexpExec$3;
+       var stickyHelpers$1 = regexpStickyHelpers;
+       var fails$k = fails$N;
+
+       var UNSUPPORTED_Y$1 = stickyHelpers$1.UNSUPPORTED_Y;
+       var arrayPush = [].push;
+       var min$4 = Math.min;
+       var MAX_UINT32 = 0xFFFFFFFF;
+
+       // Chrome 51 has a buggy "split" implementation when RegExp#exec !== nativeExec
+       // Weex JS has frozen built-in prototypes, so use try / catch wrapper
+       var SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails$k(function () {
+         // eslint-disable-next-line regexp/no-empty-group -- required for testing
+         var re = /(?:)/;
+         var originalExec = re.exec;
+         re.exec = function () { return originalExec.apply(this, arguments); };
+         var result = 'ab'.split(re);
+         return result.length !== 2 || result[0] !== 'a' || result[1] !== 'b';
+       });

 
 

-               var debounce = function debounce(callback) {
-                 setTimeout(function () {
-                   return callback.call(_this, event);
-                 });
-               };
-
-               var stack = this.listeners[event.type];
+       // @@split logic
+       fixRegExpWellKnownSymbolLogic$2('split', function (SPLIT, nativeSplit, maybeCallNative) {
+         var internalSplit;
+         if (
+           'abbc'.split(/(b)*/)[1] == 'c' ||
+           // eslint-disable-next-line regexp/no-empty-group -- required for testing
+           'test'.split(/(?:)/, -1).length != 4 ||
+           'ab'.split(/(?:ab)*/).length != 2 ||
+           '.'.split(/(.?)(.?)/).length != 4 ||
+           // eslint-disable-next-line regexp/no-assertion-capturing-group, regexp/no-empty-group -- required for testing
+           '.'.split(/()()/).length > 1 ||
+           ''.split(/.?/).length
+         ) {
+           // based on es5-shim implementation, need to rework it
+           internalSplit = function (separator, limit) {
+             var string = String(requireObjectCoercible$9(this));
+             var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
+             if (lim === 0) return [];
+             if (separator === undefined) return [string];
+             // If `separator` is not a regex, use native split
+             if (!isRegExp$2(separator)) {
+               return nativeSplit.call(string, separator, lim);
+             }
+             var output = [];
+             var flags = (separator.ignoreCase ? 'i' : '') +
+                         (separator.multiline ? 'm' : '') +
+                         (separator.unicode ? 'u' : '') +
+                         (separator.sticky ? 'y' : '');
+             var lastLastIndex = 0;
+             // Make `global` and avoid `lastIndex` issues by working with a copy
+             var separatorCopy = new RegExp(separator.source, flags + 'g');
+             var match, lastIndex, lastLength;
+             while (match = regexpExec.call(separatorCopy, string)) {
+               lastIndex = separatorCopy.lastIndex;
+               if (lastIndex > lastLastIndex) {
+                 output.push(string.slice(lastLastIndex, match.index));
+                 if (match.length > 1 && match.index < string.length) arrayPush.apply(output, match.slice(1));
+                 lastLength = match[0].length;
+                 lastLastIndex = lastIndex;
+                 if (output.length >= lim) break;
+               }
+               if (separatorCopy.lastIndex === match.index) separatorCopy.lastIndex++; // Avoid an infinite loop
+             }
+             if (lastLastIndex === string.length) {
+               if (lastLength || !separatorCopy.test('')) output.push('');
+             } else output.push(string.slice(lastLastIndex));
+             return output.length > lim ? output.slice(0, lim) : output;
+           };
+         // Chakra, V8
+         } else if ('0'.split(undefined, 0).length) {
+           internalSplit = function (separator, limit) {
+             return separator === undefined && limit === 0 ? [] : nativeSplit.call(this, separator, limit);
+           };
+         } else internalSplit = nativeSplit;

 
 

-               for (var i = 0, l = stack.length; i < l; i++) {
-                 debounce(stack[i]);
+         return [
+           // `String.prototype.split` method
+           // https://tc39.es/ecma262/#sec-string.prototype.split
+           function split(separator, limit) {
+             var O = requireObjectCoercible$9(this);
+             var splitter = separator == undefined ? undefined : separator[SPLIT];
+             return splitter !== undefined
+               ? splitter.call(separator, O, limit)
+               : internalSplit.call(String(O), separator, limit);
+           },
+           // `RegExp.prototype[@@split]` method
+           // https://tc39.es/ecma262/#sec-regexp.prototype-@@split
+           //
+           // NOTE: This cannot be properly polyfilled in engines that don't support
+           // the 'y' flag.
+           function (string, limit) {
+             var res = maybeCallNative(internalSplit, this, string, limit, internalSplit !== nativeSplit);
+             if (res.done) return res.value;
+
+             var rx = anObject$4(this);
+             var S = String(string);
+             var C = speciesConstructor$1(rx, RegExp);
+
+             var unicodeMatching = rx.unicode;
+             var flags = (rx.ignoreCase ? 'i' : '') +
+                         (rx.multiline ? 'm' : '') +
+                         (rx.unicode ? 'u' : '') +
+                         (UNSUPPORTED_Y$1 ? 'g' : 'y');
+
+             // ^(? + rx + ) is needed, in combination with some S slicing, to
+             // simulate the 'y' flag.
+             var splitter = new C(UNSUPPORTED_Y$1 ? '^(?:' + rx.source + ')' : rx, flags);
+             var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
+             if (lim === 0) return [];
+             if (S.length === 0) return callRegExpExec(splitter, S) === null ? [S] : [];
+             var p = 0;
+             var q = 0;
+             var A = [];
+             while (q < S.length) {
+               splitter.lastIndex = UNSUPPORTED_Y$1 ? 0 : q;
+               var z = callRegExpExec(splitter, UNSUPPORTED_Y$1 ? S.slice(q) : S);
+               var e;
+               if (
+                 z === null ||
+                 (e = min$4(toLength$7(splitter.lastIndex + (UNSUPPORTED_Y$1 ? q : 0)), S.length)) === p
+               ) {
+                 q = advanceStringIndex$1(S, q, unicodeMatching);
+               } else {
+                 A.push(S.slice(p, q));
+                 if (A.length === lim) return A;
+                 for (var i = 1; i <= z.length - 1; i++) {
+                   A.push(z[i]);
+                   if (A.length === lim) return A;
+                 }
+                 q = p = e;

                }
                }

-
-               return !event.defaultPrevented;

              }
              }

-           }]);
+             A.push(S.slice(p));
+             return A;
+           }
+         ];
+       }, !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC, UNSUPPORTED_Y$1);

 
 

-           return Emitter;
-         }();
+       // a string of all valid unicode whitespaces
+       var whitespaces$4 = '\u0009\u000A\u000B\u000C\u000D\u0020\u00A0\u1680\u2000\u2001\u2002' +
+         '\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF';

 
 

-         var AbortSignal =
-         /*#__PURE__*/
-         function (_Emitter) {
-           _inherits(AbortSignal, _Emitter);
+       var requireObjectCoercible$8 = requireObjectCoercible$e;
+       var whitespaces$3 = whitespaces$4;

 
 

-           function AbortSignal() {
-             var _this2;
+       var whitespace = '[' + whitespaces$3 + ']';
+       var ltrim = RegExp('^' + whitespace + whitespace + '*');
+       var rtrim$2 = RegExp(whitespace + whitespace + '*$');

 
 

-             _classCallCheck(this, AbortSignal);
+       // `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation
+       var createMethod$2 = function (TYPE) {
+         return function ($this) {
+           var string = String(requireObjectCoercible$8($this));
+           if (TYPE & 1) string = string.replace(ltrim, '');
+           if (TYPE & 2) string = string.replace(rtrim$2, '');
+           return string;
+         };
+       };

 
 

-             _this2 = _possibleConstructorReturn(this, _getPrototypeOf(AbortSignal).call(this)); // Some versions of babel does not transpile super() correctly for IE <= 10, if the parent
-             // constructor has failed to run, then "this.listeners" will still be undefined and then we call
-             // the parent constructor directly instead as a workaround. For general details, see babel bug:
-             // https://github.com/babel/babel/issues/3041
-             // This hack was added as a fix for the issue described here:
-             // https://github.com/Financial-Times/polyfill-library/pull/59#issuecomment-477558042
+       var stringTrim = {
+         // `String.prototype.{ trimLeft, trimStart }` methods
+         // https://tc39.es/ecma262/#sec-string.prototype.trimstart
+         start: createMethod$2(1),
+         // `String.prototype.{ trimRight, trimEnd }` methods
+         // https://tc39.es/ecma262/#sec-string.prototype.trimend
+         end: createMethod$2(2),
+         // `String.prototype.trim` method
+         // https://tc39.es/ecma262/#sec-string.prototype.trim
+         trim: createMethod$2(3)
+       };

 
 

-             if (!_this2.listeners) {
-               Emitter.call(_assertThisInitialized(_this2));
-             } // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
-             // we want Object.keys(new AbortController().signal) to be [] for compat with the native impl
+       var fails$j = fails$N;
+       var whitespaces$2 = whitespaces$4;

 
 

+       var non = '\u200B\u0085\u180E';

 
 

-             Object.defineProperty(_assertThisInitialized(_this2), 'aborted', {
-               value: false,
-               writable: true,
-               configurable: true
-             });
-             Object.defineProperty(_assertThisInitialized(_this2), 'onabort', {
-               value: null,
-               writable: true,
-               configurable: true
-             });
-             return _this2;
-           }
+       // check that a method works with the correct list
+       // of whitespaces and has a correct name
+       var stringTrimForced = function (METHOD_NAME) {
+         return fails$j(function () {
+           return !!whitespaces$2[METHOD_NAME]() || non[METHOD_NAME]() != non || whitespaces$2[METHOD_NAME].name !== METHOD_NAME;
+         });
+       };

 
 

-           _createClass(AbortSignal, [{
-             key: "toString",
-             value: function toString() {
-               return '[object AbortSignal]';
-             }
-           }, {
-             key: "dispatchEvent",
-             value: function dispatchEvent(event) {
-               if (event.type === 'abort') {
-                 this.aborted = true;
+       var $$O = _export;
+       var $trim = stringTrim.trim;
+       var forcedStringTrimMethod = stringTrimForced;

 
 

-                 if (typeof this.onabort === 'function') {
-                   this.onabort.call(this, event);
-                 }
-               }
+       // `String.prototype.trim` method
+       // https://tc39.es/ecma262/#sec-string.prototype.trim
+       $$O({ target: 'String', proto: true, forced: forcedStringTrimMethod('trim') }, {
+         trim: function trim() {
+           return $trim(this);
+         }
+       });

 
 

-               _get(_getPrototypeOf(AbortSignal.prototype), "dispatchEvent", this).call(this, event);
-             }
-           }]);
+       var DESCRIPTORS$9 = descriptors;
+       var defineProperty$4 = objectDefineProperty.f;

 
 

-           return AbortSignal;
-         }(Emitter);
-         var AbortController =
-         /*#__PURE__*/
-         function () {
-           function AbortController() {
-             _classCallCheck(this, AbortController);
+       var FunctionPrototype = Function.prototype;
+       var FunctionPrototypeToString = FunctionPrototype.toString;
+       var nameRE = /^\s*function ([^ (]*)/;
+       var NAME = 'name';

 
 

-             // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
-             // we want Object.keys(new AbortController()) to be [] for compat with the native impl
-             Object.defineProperty(this, 'signal', {
-               value: new AbortSignal(),
-               writable: true,
-               configurable: true
-             });
+       // Function instances `.name` property
+       // https://tc39.es/ecma262/#sec-function-instances-name
+       if (DESCRIPTORS$9 && !(NAME in FunctionPrototype)) {
+         defineProperty$4(FunctionPrototype, NAME, {
+           configurable: true,
+           get: function () {
+             try {
+               return FunctionPrototypeToString.call(this).match(nameRE)[1];
+             } catch (error) {
+               return '';
+             }

            }
            }

+         });
+       }

 
 

-           _createClass(AbortController, [{
-             key: "abort",
-             value: function abort() {
-               var event;
+       var $$N = _export;
+       var DESCRIPTORS$8 = descriptors;
+       var create$6 = objectCreate;

 
 

-               try {
-                 event = new Event('abort');
-               } catch (e) {
-                 if (typeof document !== 'undefined') {
-                   if (!document.createEvent) {
-                     // For Internet Explorer 8:
-                     event = document.createEventObject();
-                     event.type = 'abort';
-                   } else {
-                     // For Internet Explorer 11:
-                     event = document.createEvent('Event');
-                     event.initEvent('abort', false, false);
-                   }
-                 } else {
-                   // Fallback where document isn't available:
-                   event = {
-                     type: 'abort',
-                     bubbles: false,
-                     cancelable: false
-                   };
-                 }
-               }
+       // `Object.create` method
+       // https://tc39.es/ecma262/#sec-object.create
+       $$N({ target: 'Object', stat: true, sham: !DESCRIPTORS$8 }, {
+         create: create$6
+       });

 
 

-               this.signal.dispatchEvent(event);
-             }
-           }, {
-             key: "toString",
-             value: function toString() {
-               return '[object AbortController]';
-             }
-           }]);
+       var $$M = _export;
+       var global$9 = global$F;
+       var userAgent = engineUserAgent;
+
+       var slice$3 = [].slice;
+       var MSIE = /MSIE .\./.test(userAgent); // <- dirty ie9- check
+
+       var wrap$1 = function (scheduler) {
+         return function (handler, timeout /* , ...arguments */) {
+           var boundArgs = arguments.length > 2;
+           var args = boundArgs ? slice$3.call(arguments, 2) : undefined;
+           return scheduler(boundArgs ? function () {
+             // eslint-disable-next-line no-new-func -- spec requirement
+             (typeof handler == 'function' ? handler : Function(handler)).apply(this, args);
+           } : handler, timeout);
+         };
+       };
+
+       // ie9- setTimeout & setInterval additional parameters fix
+       // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timers
+       $$M({ global: true, bind: true, forced: MSIE }, {
+         // `setTimeout` method
+         // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-settimeout
+         setTimeout: wrap$1(global$9.setTimeout),
+         // `setInterval` method
+         // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-setinterval
+         setInterval: wrap$1(global$9.setInterval)
+       });

 
 

-           return AbortController;
-         }();
+       var global$8 = typeof globalThis !== 'undefined' && globalThis || typeof self !== 'undefined' && self || typeof global$8 !== 'undefined' && global$8;
+       var support = {
+         searchParams: 'URLSearchParams' in global$8,
+         iterable: 'Symbol' in global$8 && 'iterator' in Symbol,
+         blob: 'FileReader' in global$8 && 'Blob' in global$8 && function () {
+           try {
+             new Blob();
+             return true;
+           } catch (e) {
+             return false;
+           }
+         }(),
+         formData: 'FormData' in global$8,
+         arrayBuffer: 'ArrayBuffer' in global$8
+       };

 
 

-         if (typeof Symbol !== 'undefined' && Symbol.toStringTag) {
-           // These are necessary to make sure that we get correct output for:
-           // Object.prototype.toString.call(new AbortController())
-           AbortController.prototype[Symbol.toStringTag] = 'AbortController';
-           AbortSignal.prototype[Symbol.toStringTag] = 'AbortSignal';
-         }
+       function isDataView(obj) {
+         return obj && DataView.prototype.isPrototypeOf(obj);
+       }

 
 

-         function polyfillNeeded(self) {
-           if (self.__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL) {
-             console.log('__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL=true is set, will force install polyfill');
-             return true;
-           } // Note that the "unfetch" minimal fetch polyfill defines fetch() without
-           // defining window.Request, and this polyfill need to work on top of unfetch
-           // so the below feature detection needs the !self.AbortController part.
-           // The Request.prototype check is also needed because Safari versions 11.1.2
-           // up to and including 12.1.x has a window.AbortController present but still
-           // does NOT correctly implement abortable fetch:
-           // https://bugs.webkit.org/show_bug.cgi?id=174980#c2
+       if (support.arrayBuffer) {
+         var viewClasses = ['[object Int8Array]', '[object Uint8Array]', '[object Uint8ClampedArray]', '[object Int16Array]', '[object Uint16Array]', '[object Int32Array]', '[object Uint32Array]', '[object Float32Array]', '[object Float64Array]'];

 
 

+         var isArrayBufferView = ArrayBuffer.isView || function (obj) {
+           return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1;
+         };
+       }

 
 

-           return typeof self.Request === 'function' && !self.Request.prototype.hasOwnProperty('signal') || !self.AbortController;
+       function normalizeName(name) {
+         if (typeof name !== 'string') {
+           name = String(name);

          }
 
          }
 

-         /**
-          * Note: the "fetch.Request" default value is available for fetch imported from
-          * the "node-fetch" package and not in browsers. This is OK since browsers
-          * will be importing umd-polyfill.js from that path "self" is passed the
-          * decorator so the default value will not be used (because browsers that define
-          * fetch also has Request). One quirky setup where self.fetch exists but
-          * self.Request does not is when the "unfetch" minimal fetch polyfill is used
-          * on top of IE11; for this case the browser will try to use the fetch.Request
-          * default value which in turn will be undefined but then then "if (Request)"
-          * will ensure that you get a patched fetch but still no Request (as expected).
-          * @param {fetch, Request = fetch.Request}
-          * @returns {fetch: abortableFetch, Request: AbortableRequest}
-          */
+         if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
+           throw new TypeError('Invalid character in header field name: "' + name + '"');
+         }

 
 

-         function abortableFetchDecorator(patchTargets) {
-           if ('function' === typeof patchTargets) {
-             patchTargets = {
-               fetch: patchTargets
-             };
-           }
+         return name.toLowerCase();
+       }

 
 

-           var _patchTargets = patchTargets,
-               fetch = _patchTargets.fetch,
-               _patchTargets$Request = _patchTargets.Request,
-               NativeRequest = _patchTargets$Request === void 0 ? fetch.Request : _patchTargets$Request,
-               NativeAbortController = _patchTargets.AbortController,
-               _patchTargets$__FORCE = _patchTargets.__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL,
-               __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL = _patchTargets$__FORCE === void 0 ? false : _patchTargets$__FORCE;
+       function normalizeValue(value) {
+         if (typeof value !== 'string') {
+           value = String(value);
+         }

 
 

-           if (!polyfillNeeded({
-             fetch: fetch,
-             Request: NativeRequest,
-             AbortController: NativeAbortController,
-             __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL: __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL
-           })) {
+         return value;
+       } // Build a destructive iterator for the value list
+
+
+       function iteratorFor(items) {
+         var iterator = {
+           next: function next() {
+             var value = items.shift();

              return {
              return {

-               fetch: fetch,
-               Request: Request
+               done: value === undefined,
+               value: value

              };
            }
              };
            }

+         };

 
 

-           var Request = NativeRequest; // Note that the "unfetch" minimal fetch polyfill defines fetch() without
-           // defining window.Request, and this polyfill need to work on top of unfetch
-           // hence we only patch it if it's available. Also we don't patch it if signal
-           // is already available on the Request prototype because in this case support
-           // is present and the patching below can cause a crash since it assigns to
-           // request.signal which is technically a read-only property. This latter error
-           // happens when you run the main5.js node-fetch example in the repo
-           // "abortcontroller-polyfill-examples". The exact error is:
-           //   request.signal = init.signal;
-           //   ^
-           // TypeError: Cannot set property signal of #<Request> which has only a getter
+         if (support.iterable) {
+           iterator[Symbol.iterator] = function () {
+             return iterator;
+           };
+         }

 
 

-           if (Request && !Request.prototype.hasOwnProperty('signal') || __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL) {
-             Request = function Request(input, init) {
-               var signal;
+         return iterator;
+       }

 
 

-               if (init && init.signal) {
-                 signal = init.signal; // Never pass init.signal to the native Request implementation when the polyfill has
-                 // been installed because if we're running on top of a browser with a
-                 // working native AbortController (i.e. the polyfill was installed due to
-                 // __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL being set), then passing our
-                 // fake AbortSignal to the native fetch will trigger:
-                 // TypeError: Failed to construct 'Request': member signal is not of type AbortSignal.
+       function Headers(headers) {
+         this.map = {};

 
 

-                 delete init.signal;
-               }
+         if (headers instanceof Headers) {
+           headers.forEach(function (value, name) {
+             this.append(name, value);
+           }, this);
+         } else if (Array.isArray(headers)) {
+           headers.forEach(function (header) {
+             this.append(header[0], header[1]);
+           }, this);
+         } else if (headers) {
+           Object.getOwnPropertyNames(headers).forEach(function (name) {
+             this.append(name, headers[name]);
+           }, this);
+         }
+       }

 
 

-               var request = new NativeRequest(input, init);
+       Headers.prototype.append = function (name, value) {
+         name = normalizeName(name);
+         value = normalizeValue(value);
+         var oldValue = this.map[name];
+         this.map[name] = oldValue ? oldValue + ', ' + value : value;
+       };

 
 

-               if (signal) {
-                 Object.defineProperty(request, 'signal', {
-                   writable: false,
-                   enumerable: false,
-                   configurable: true,
-                   value: signal
-                 });
-               }
+       Headers.prototype['delete'] = function (name) {
+         delete this.map[normalizeName(name)];
+       };

 
 

-               return request;
-             };
+       Headers.prototype.get = function (name) {
+         name = normalizeName(name);
+         return this.has(name) ? this.map[name] : null;
+       };

 
 

-             Request.prototype = NativeRequest.prototype;
+       Headers.prototype.has = function (name) {
+         return this.map.hasOwnProperty(normalizeName(name));
+       };
+
+       Headers.prototype.set = function (name, value) {
+         this.map[normalizeName(name)] = normalizeValue(value);
+       };
+
+       Headers.prototype.forEach = function (callback, thisArg) {
+         for (var name in this.map) {
+           if (this.map.hasOwnProperty(name)) {
+             callback.call(thisArg, this.map[name], name, this);

            }
            }

+         }
+       };

 
 

-           var realFetch = fetch;
+       Headers.prototype.keys = function () {
+         var items = [];
+         this.forEach(function (value, name) {
+           items.push(name);
+         });
+         return iteratorFor(items);
+       };

 
 

-           var abortableFetch = function abortableFetch(input, init) {
-             var signal = Request && Request.prototype.isPrototypeOf(input) ? input.signal : init ? init.signal : undefined;
+       Headers.prototype.values = function () {
+         var items = [];
+         this.forEach(function (value) {
+           items.push(value);
+         });
+         return iteratorFor(items);
+       };

 
 

-             if (signal) {
-               var abortError;
+       Headers.prototype.entries = function () {
+         var items = [];
+         this.forEach(function (value, name) {
+           items.push([name, value]);
+         });
+         return iteratorFor(items);
+       };

 
 

-               try {
-                 abortError = new DOMException('Aborted', 'AbortError');
-               } catch (err) {
-                 // IE 11 does not support calling the DOMException constructor, use a
-                 // regular error object on it instead.
-                 abortError = new Error('Aborted');
-                 abortError.name = 'AbortError';
-               } // Return early if already aborted, thus avoiding making an HTTP request
+       if (support.iterable) {
+         Headers.prototype[Symbol.iterator] = Headers.prototype.entries;
+       }

 
 

+       function consumed(body) {
+         if (body.bodyUsed) {
+           return Promise.reject(new TypeError('Already read'));
+         }

 
 

-               if (signal.aborted) {
-                 return Promise.reject(abortError);
-               } // Turn an event into a promise, reject it once `abort` is dispatched
+         body.bodyUsed = true;
+       }

 
 

+       function fileReaderReady(reader) {
+         return new Promise(function (resolve, reject) {
+           reader.onload = function () {
+             resolve(reader.result);
+           };

 
 

-               var cancellation = new Promise(function (_, reject) {
-                 signal.addEventListener('abort', function () {
-                   return reject(abortError);
-                 }, {
-                   once: true
-                 });
-               });
+           reader.onerror = function () {
+             reject(reader.error);
+           };
+         });
+       }

 
 

-               if (init && init.signal) {
-                 // Never pass .signal to the native implementation when the polyfill has
-                 // been installed because if we're running on top of a browser with a
-                 // working native AbortController (i.e. the polyfill was installed due to
-                 // __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL being set), then passing our
-                 // fake AbortSignal to the native fetch will trigger:
-                 // TypeError: Failed to execute 'fetch' on 'Window': member signal is not of type AbortSignal.
-                 delete init.signal;
-               } // Return the fastest promise (don't need to wait for request to finish)
+       function readBlobAsArrayBuffer(blob) {
+         var reader = new FileReader();
+         var promise = fileReaderReady(reader);
+         reader.readAsArrayBuffer(blob);
+         return promise;
+       }

 
 

+       function readBlobAsText(blob) {
+         var reader = new FileReader();
+         var promise = fileReaderReady(reader);
+         reader.readAsText(blob);
+         return promise;
+       }

 
 

-               return Promise.race([cancellation, realFetch(input, init)]);
-             }
+       function readArrayBufferAsText(buf) {
+         var view = new Uint8Array(buf);
+         var chars = new Array(view.length);

 
 

-             return realFetch(input, init);
-           };
+         for (var i = 0; i < view.length; i++) {
+           chars[i] = String.fromCharCode(view[i]);
+         }

 
 

-           return {
-             fetch: abortableFetch,
-             Request: Request
-           };
+         return chars.join('');
+       }
+
+       function bufferClone(buf) {
+         if (buf.slice) {
+           return buf.slice(0);
+         } else {
+           var view = new Uint8Array(buf.byteLength);
+           view.set(new Uint8Array(buf));
+           return view.buffer;

          }
          }

+       }

 
 

-         (function (self) {
+       function Body() {
+         this.bodyUsed = false;

 
 

-           if (!polyfillNeeded(self)) {
-             return;
-           }
+         this._initBody = function (body) {
+           /*
+             fetch-mock wraps the Response object in an ES6 Proxy to
+             provide useful test harness features such as flush. However, on
+             ES5 browsers without fetch or Proxy support pollyfills must be used;
+             the proxy-pollyfill is unable to proxy an attribute unless it exists
+             on the object before the Proxy is created. This change ensures
+             Response.bodyUsed exists on the instance, while maintaining the
+             semantic of setting Request.bodyUsed in the constructor before
+             _initBody is called.
+           */
+           this.bodyUsed = this.bodyUsed;
+           this._bodyInit = body;

 
 

-           if (!self.fetch) {
-             console.warn('fetch() is not available, cannot install abortcontroller-polyfill');
-             return;
+           if (!body) {
+             this._bodyText = '';
+           } else if (typeof body === 'string') {
+             this._bodyText = body;
+           } else if (support.blob && Blob.prototype.isPrototypeOf(body)) {
+             this._bodyBlob = body;
+           } else if (support.formData && FormData.prototype.isPrototypeOf(body)) {
+             this._bodyFormData = body;
+           } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
+             this._bodyText = body.toString();
+           } else if (support.arrayBuffer && support.blob && isDataView(body)) {
+             this._bodyArrayBuffer = bufferClone(body.buffer); // IE 10-11 can't handle a DataView body.
+
+             this._bodyInit = new Blob([this._bodyArrayBuffer]);
+           } else if (support.arrayBuffer && (ArrayBuffer.prototype.isPrototypeOf(body) || isArrayBufferView(body))) {
+             this._bodyArrayBuffer = bufferClone(body);
+           } else {
+             this._bodyText = body = Object.prototype.toString.call(body);

            }
 
            }
 

-           var _abortableFetch = abortableFetchDecorator(self),
-               fetch = _abortableFetch.fetch,
-               Request = _abortableFetch.Request;
+           if (!this.headers.get('content-type')) {
+             if (typeof body === 'string') {
+               this.headers.set('content-type', 'text/plain;charset=UTF-8');
+             } else if (this._bodyBlob && this._bodyBlob.type) {
+               this.headers.set('content-type', this._bodyBlob.type);
+             } else if (support.searchParams && URLSearchParams.prototype.isPrototypeOf(body)) {
+               this.headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
+             }
+           }
+         };

 
 

-           self.fetch = fetch;
-           self.Request = Request;
-           Object.defineProperty(self, 'AbortController', {
-             writable: true,
-             enumerable: false,
-             configurable: true,
-             value: AbortController
-           });
-           Object.defineProperty(self, 'AbortSignal', {
-             writable: true,
-             enumerable: false,
-             configurable: true,
-             value: AbortSignal
-           });
-         })(typeof self !== 'undefined' ? self : commonjsGlobal);
+         if (support.blob) {
+           this.blob = function () {
+             var rejected = consumed(this);

 
 

-       })));
+             if (rejected) {
+               return rejected;
+             }

 
 

-       function actionAddEntity(way) {
-           return function(graph) {
-               return graph.replace(way);
+             if (this._bodyBlob) {
+               return Promise.resolve(this._bodyBlob);
+             } else if (this._bodyArrayBuffer) {
+               return Promise.resolve(new Blob([this._bodyArrayBuffer]));
+             } else if (this._bodyFormData) {
+               throw new Error('could not read FormData body as blob');
+             } else {
+               return Promise.resolve(new Blob([this._bodyText]));
+             }

            };
            };

-       }
-
-       /*
-       Order the nodes of a way in reverse order and reverse any direction dependent tags
-       other than `oneway`. (We assume that correcting a backwards oneway is the primary
-       reason for reversing a way.)
-
-       In addition, numeric-valued `incline` tags are negated.

 
 

-       The JOSM implementation was used as a guide, but transformations that were of unclear benefit
-       or adjusted tags that don't seem to be used in practice were omitted.
+           this.arrayBuffer = function () {
+             if (this._bodyArrayBuffer) {
+               var isConsumed = consumed(this);

 
 

-       References:
-           http://wiki.openstreetmap.org/wiki/Forward_%26_backward,_left_%26_right
-           http://wiki.openstreetmap.org/wiki/Key:direction#Steps
-           http://wiki.openstreetmap.org/wiki/Key:incline
-           http://wiki.openstreetmap.org/wiki/Route#Members
-           http://josm.openstreetmap.de/browser/josm/trunk/src/org/openstreetmap/josm/corrector/ReverseWayTagCorrector.java
-           http://wiki.openstreetmap.org/wiki/Tag:highway%3Dstop
-           http://wiki.openstreetmap.org/wiki/Key:traffic_sign#On_a_way_or_area
-       */
-       function actionReverse(entityID, options) {
-           var ignoreKey = /^.*(_|:)?(description|name|note|website|ref|source|comment|watch|attribution)(_|:)?/;
-           var numeric = /^([+\-]?)(?=[\d.])/;
-           var directionKey = /direction$/;
-           var turn_lanes = /^turn:lanes:?/;
-           var keyReplacements = [
-               [/:right$/, ':left'],
-               [/:left$/, ':right'],
-               [/:forward$/, ':backward'],
-               [/:backward$/, ':forward'],
-               [/:right:/, ':left:'],
-               [/:left:/, ':right:'],
-               [/:forward:/, ':backward:'],
-               [/:backward:/, ':forward:']
-           ];
-           var valueReplacements = {
-               left: 'right',
-               right: 'left',
-               up: 'down',
-               down: 'up',
-               forward: 'backward',
-               backward: 'forward',
-               forwards: 'backward',
-               backwards: 'forward',
-           };
-           var roleReplacements = {
-               forward: 'backward',
-               backward: 'forward',
-               forwards: 'backward',
-               backwards: 'forward'
-           };
-           var onewayReplacements = {
-               yes: '-1',
-               '1': '-1',
-               '-1': 'yes'
-           };
+               if (isConsumed) {
+                 return isConsumed;
+               }

 
 

-           var compassReplacements = {
-               N: 'S',
-               NNE: 'SSW',
-               NE: 'SW',
-               ENE: 'WSW',
-               E: 'W',
-               ESE: 'WNW',
-               SE: 'NW',
-               SSE: 'NNW',
-               S: 'N',
-               SSW: 'NNE',
-               SW: 'NE',
-               WSW: 'ENE',
-               W: 'E',
-               WNW: 'ESE',
-               NW: 'SE',
-               NNW: 'SSE'
+               if (ArrayBuffer.isView(this._bodyArrayBuffer)) {
+                 return Promise.resolve(this._bodyArrayBuffer.buffer.slice(this._bodyArrayBuffer.byteOffset, this._bodyArrayBuffer.byteOffset + this._bodyArrayBuffer.byteLength));
+               } else {
+                 return Promise.resolve(this._bodyArrayBuffer);
+               }
+             } else {
+               return this.blob().then(readBlobAsArrayBuffer);
+             }

            };
            };

+         }

 
 

+         this.text = function () {
+           var rejected = consumed(this);

 
 

-           function reverseKey(key) {
-               for (var i = 0; i < keyReplacements.length; ++i) {
-                   var replacement = keyReplacements[i];
-                   if (replacement[0].test(key)) {
-                       return key.replace(replacement[0], replacement[1]);
-                   }
-               }
-               return key;
+           if (rejected) {
+             return rejected;

            }
 
            }
 

+           if (this._bodyBlob) {
+             return readBlobAsText(this._bodyBlob);
+           } else if (this._bodyArrayBuffer) {
+             return Promise.resolve(readArrayBufferAsText(this._bodyArrayBuffer));
+           } else if (this._bodyFormData) {
+             throw new Error('could not read FormData body as text');
+           } else {
+             return Promise.resolve(this._bodyText);
+           }
+         };

 
 

-           function reverseValue(key, value, includeAbsolute) {
-               if (ignoreKey.test(key)) { return value; }
-
-               // Turn lanes are left/right to key (not way) direction - #5674
-               if (turn_lanes.test(key)) {
-                   return value;
+         if (support.formData) {
+           this.formData = function () {
+             return this.text().then(decode);
+           };
+         }

 
 

-               } else if (key === 'incline' && numeric.test(value)) {
-                   return value.replace(numeric, function(_, sign) { return sign === '-' ? '' : '-'; });
+         this.json = function () {
+           return this.text().then(JSON.parse);
+         };

 
 

-               } else if (options && options.reverseOneway && key === 'oneway') {
-                   return onewayReplacements[value] || value;
+         return this;
+       } // HTTP methods whose capitalization should be normalized

 
 

-               } else if (includeAbsolute && directionKey.test(key)) {
-                   if (compassReplacements[value]) { return compassReplacements[value]; }

 
 

-                   var degrees = parseFloat(value);
-                   if (typeof degrees === 'number' && !isNaN(degrees)) {
-                       if (degrees < 180) {
-                           degrees += 180;
-                       } else {
-                           degrees -= 180;
-                       }
-                       return degrees.toString();
-                   }
-               }
+       var methods = ['DELETE', 'GET', 'HEAD', 'OPTIONS', 'POST', 'PUT'];

 
 

-               return valueReplacements[value] || value;
-           }
+       function normalizeMethod(method) {
+         var upcased = method.toUpperCase();
+         return methods.indexOf(upcased) > -1 ? upcased : method;
+       }

 
 

+       function Request(input, options) {
+         if (!(this instanceof Request)) {
+           throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
+         }

 
 

-           // Reverse the direction of tags attached to the nodes - #3076
-           function reverseNodeTags(graph, nodeIDs) {
-               for (var i = 0; i < nodeIDs.length; i++) {
-                   var node = graph.hasEntity(nodeIDs[i]);
-                   if (!node || !Object.keys(node.tags).length) { continue; }
+         options = options || {};
+         var body = options.body;

 
 

-                   var tags = {};
-                   for (var key in node.tags) {
-                       tags[reverseKey(key)] = reverseValue(key, node.tags[key], node.id === entityID);
-                   }
-                   graph = graph.replace(node.update({tags: tags}));
-               }
-               return graph;
+         if (input instanceof Request) {
+           if (input.bodyUsed) {
+             throw new TypeError('Already read');

            }
 
            }
 

+           this.url = input.url;
+           this.credentials = input.credentials;

 
 

-           function reverseWay(graph, way) {
-               var nodes = way.nodes.slice().reverse();
-               var tags = {};
-               var role;
-
-               for (var key in way.tags) {
-                   tags[reverseKey(key)] = reverseValue(key, way.tags[key]);
-               }
+           if (!options.headers) {
+             this.headers = new Headers(input.headers);
+           }

 
 

-               graph.parentRelations(way).forEach(function(relation) {
-                   relation.members.forEach(function(member, index) {
-                       if (member.id === way.id && (role = roleReplacements[member.role])) {
-                           relation = relation.updateMember({role: role}, index);
-                           graph = graph.replace(relation);
-                       }
-                   });
-               });
+           this.method = input.method;
+           this.mode = input.mode;
+           this.signal = input.signal;

 
 

-               // Reverse any associated directions on nodes on the way and then replace
-               // the way itself with the reversed node ids and updated way tags
-               return reverseNodeTags(graph, nodes)
-                   .replace(way.update({nodes: nodes, tags: tags}));
+           if (!body && input._bodyInit != null) {
+             body = input._bodyInit;
+             input.bodyUsed = true;

            }
            }

+         } else {
+           this.url = String(input);
+         }

 
 

+         this.credentials = options.credentials || this.credentials || 'same-origin';

 
 

-           var action = function(graph) {
-               var entity = graph.entity(entityID);
-               if (entity.type === 'way') {
-                   return reverseWay(graph, entity);
-               }
-               return reverseNodeTags(graph, [entityID]);
-           };
+         if (options.headers || !this.headers) {
+           this.headers = new Headers(options.headers);
+         }

 
 

-           action.disabled = function(graph) {
-               var entity = graph.hasEntity(entityID);
-               if (!entity || entity.type === 'way') { return false; }
+         this.method = normalizeMethod(options.method || this.method || 'GET');
+         this.mode = options.mode || this.mode || null;
+         this.signal = options.signal || this.signal;
+         this.referrer = null;

 
 

-               for (var key in entity.tags) {
-                   var value = entity.tags[key];
-                   if (reverseKey(key) !== key || reverseValue(key, value, true) !== value) {
-                       return false;
-                   }
-               }
-               return 'nondirectional_node';
-           };
+         if ((this.method === 'GET' || this.method === 'HEAD') && body) {
+           throw new TypeError('Body not allowed for GET or HEAD requests');
+         }

 
 

-           action.entityID = function() {
-               return entityID;
-           };
+         this._initBody(body);

 
 

-           return action;
-       }
+         if (this.method === 'GET' || this.method === 'HEAD') {
+           if (options.cache === 'no-store' || options.cache === 'no-cache') {
+             // Search for a '_' parameter in the query string
+             var reParamSearch = /([?&])_=[^&]*/;

 
 

-       function osmIsInterestingTag(key) {
-           return key !== 'attribution' &&
-               key !== 'created_by' &&
-               key !== 'source' &&
-               key !== 'odbl' &&
-               key.indexOf('source:') !== 0 &&
-               key.indexOf('source_ref') !== 0 && // purposely exclude colon
-               key.indexOf('tiger:') !== 0;
+             if (reParamSearch.test(this.url)) {
+               // If it already exists then set the value with the current time
+               this.url = this.url.replace(reParamSearch, '$1_=' + new Date().getTime());
+             } else {
+               // Otherwise add a new '_' parameter to the end with the current time
+               var reQueryString = /\?/;
+               this.url += (reQueryString.test(this.url) ? '&' : '?') + '_=' + new Date().getTime();
+             }
+           }
+         }

        }
 
        }
 

-       var osmAreaKeys = {};
-       function osmSetAreaKeys(value) {
-           osmAreaKeys = value;
-       }
+       Request.prototype.clone = function () {
+         return new Request(this, {
+           body: this._bodyInit
+         });
+       };

 
 

-       // returns an object with the tag from `tags` that implies an area geometry, if any
-       function osmTagSuggestingArea(tags) {
-           if (tags.area === 'yes') { return { area: 'yes' }; }
-           if (tags.area === 'no') { return null; }
-
-           // `highway` and `railway` are typically linear features, but there
-           // are a few exceptions that should be treated as areas, even in the
-           // absence of a proper `area=yes` or `areaKeys` tag.. see #4194
-           var lineKeys = {
-               highway: {
-                   rest_area: true,
-                   services: true
-               },
-               railway: {
-                   roundhouse: true,
-                   station: true,
-                   traverser: true,
-                   turntable: true,
-                   wash: true
-               }
-           };
-           var returnTags = {};
-           for (var key in tags) {
-               if (key in osmAreaKeys && !(tags[key] in osmAreaKeys[key])) {
-                   returnTags[key] = tags[key];
-                   return returnTags;
-               }
-               if (key in lineKeys && tags[key] in lineKeys[key]) {
-                   returnTags[key] = tags[key];
-                   return returnTags;
-               }
+       function decode(body) {
+         var form = new FormData();
+         body.trim().split('&').forEach(function (bytes) {
+           if (bytes) {
+             var split = bytes.split('=');
+             var name = split.shift().replace(/\+/g, ' ');
+             var value = split.join('=').replace(/\+/g, ' ');
+             form.append(decodeURIComponent(name), decodeURIComponent(value));

            }
            }

-           return null;
+         });
+         return form;

        }
 
        }
 

-       // Tags that indicate a node can be a standalone point
-       // e.g. { amenity: { bar: true, parking: true, ... } ... }
-       var osmPointTags = {};
-       function osmSetPointTags(value) {
-           osmPointTags = value;
-       }
-       // Tags that indicate a node can be part of a way
-       // e.g. { amenity: { parking: true, ... }, highway: { stop: true ... } ... }
-       var osmVertexTags = {};
-       function osmSetVertexTags(value) {
-           osmVertexTags = value;
-       }
+       function parseHeaders(rawHeaders) {
+         var headers = new Headers(); // Replace instances of \r\n and \n followed by at least one space or horizontal tab with a space
+         // https://tools.ietf.org/html/rfc7230#section-3.2

 
 

-       function osmNodeGeometriesForTags(nodeTags) {
-           var geometries = {};
-           for (var key in nodeTags) {
-               if (osmPointTags[key] &&
-                   (osmPointTags[key]['*'] || osmPointTags[key][nodeTags[key]])) {
-                   geometries.point = true;
-               }
-               if (osmVertexTags[key] &&
-                   (osmVertexTags[key]['*'] || osmVertexTags[key][nodeTags[key]])) {
-                   geometries.vertex = true;
-               }
-               // break early if both are already supported
-               if (geometries.point && geometries.vertex) { break; }
-           }
-           return geometries;
-       }
+         var preProcessedHeaders = rawHeaders.replace(/\r?\n[\t ]+/g, ' '); // Avoiding split via regex to work around a common IE11 bug with the core-js 3.6.0 regex polyfill
+         // https://github.com/github/fetch/issues/748
+         // https://github.com/zloirock/core-js/issues/751

 
 

-       var osmOneWayTags = {
-           'aerialway': {
-               'chair_lift': true,
-               'drag_lift': true,
-               'j-bar': true,
-               'magic_carpet': true,
-               'mixed_lift': true,
-               'platter': true,
-               'rope_tow': true,
-               't-bar': true,
-               'zip_line': true
-           },
-           'highway': {
-               'motorway': true
-           },
-           'junction': {
-               'circular': true,
-               'roundabout': true
-           },
-           'man_made': {
-               'goods_conveyor': true,
-               'piste:halfpipe': true
-           },
-           'piste:type': {
-               'downhill': true,
-               'sled': true,
-               'yes': true
-           },
-           'waterway': {
-               'canal': true,
-               'ditch': true,
-               'drain': true,
-               'fish_pass': true,
-               'river': true,
-               'stream': true,
-               'tidal_channel': true
-           }
-       };
+         preProcessedHeaders.split('\r').map(function (header) {
+           return header.indexOf('\n') === 0 ? header.substr(1, header.length) : header;
+         }).forEach(function (line) {
+           var parts = line.split(':');
+           var key = parts.shift().trim();

 
 

-       // solid and smooth surfaces akin to the assumed default road surface in OSM
-       var osmPavedTags = {
-           'surface': {
-               'paved': true,
-               'asphalt': true,
-               'concrete': true,
-               'concrete:lanes': true,
-               'concrete:plates': true
-           },
-           'tracktype': {
-               'grade1': true
+           if (key) {
+             var value = parts.join(':').trim();
+             headers.append(key, value);

            }
            }

-       };
+         });
+         return headers;
+       }

 
 

-       // solid, if somewhat uncommon surfaces with a high range of smoothness
-       var osmSemipavedTags = {
-           'surface': {
-               'cobblestone': true,
-               'cobblestone:flattened': true,
-               'unhewn_cobblestone': true,
-               'sett': true,
-               'paving_stones': true,
-               'metal': true,
-               'wood': true
-           }
-       };
+       Body.call(Request.prototype);
+       function Response(bodyInit, options) {
+         if (!(this instanceof Response)) {
+           throw new TypeError('Please use the "new" operator, this DOM object constructor cannot be called as a function.');
+         }

 
 

-       var osmRightSideIsInsideTags = {
-           'natural': {
-               'cliff': true,
-               'coastline': 'coastline',
-           },
-           'barrier': {
-               'retaining_wall': true,
-               'kerb': true,
-               'guard_rail': true,
-               'city_wall': true,
-           },
-           'man_made': {
-               'embankment': true
-           },
-           'waterway': {
-               'weir': true
-           }
-       };
+         if (!options) {
+           options = {};
+         }

 
 

-       // "highway" tag values for pedestrian or vehicle right-of-ways that make up the routable network
-       // (does not include `raceway`)
-       var osmRoutableHighwayTagValues = {
-           motorway: true, trunk: true, primary: true, secondary: true, tertiary: true, residential: true,
-           motorway_link: true, trunk_link: true, primary_link: true, secondary_link: true, tertiary_link: true,
-           unclassified: true, road: true, service: true, track: true, living_street: true, bus_guideway: true,
-           path: true, footway: true, cycleway: true, bridleway: true, pedestrian: true, corridor: true, steps: true
-       };
-       // "highway" tag values that generally do not allow motor vehicles
-       var osmPathHighwayTagValues = {
-           path: true, footway: true, cycleway: true, bridleway: true, pedestrian: true, corridor: true, steps: true
-       };
+         this.type = 'default';
+         this.status = options.status === undefined ? 200 : options.status;
+         this.ok = this.status >= 200 && this.status < 300;
+         this.statusText = options.statusText === undefined ? '' : '' + options.statusText;
+         this.headers = new Headers(options.headers);
+         this.url = options.url || '';

 
 

-       // "railway" tag values representing existing railroad tracks (purposely does not include 'abandoned')
-       var osmRailwayTrackTagValues = {
-           rail: true, light_rail: true, tram: true, subway: true,
-           monorail: true, funicular: true, miniature: true, narrow_gauge: true,
-           disused: true, preserved: true
-       };
+         this._initBody(bodyInit);
+       }
+       Body.call(Response.prototype);

 
 

-       // "waterway" tag values for line features representing water flow
-       var osmFlowingWaterwayTagValues = {
-           canal: true, ditch: true, drain: true, fish_pass: true, river: true, stream: true, tidal_channel: true
+       Response.prototype.clone = function () {
+         return new Response(this._bodyInit, {
+           status: this.status,
+           statusText: this.statusText,
+           headers: new Headers(this.headers),
+           url: this.url
+         });

        };
 
        };
 

-       // Adds floating point numbers with twice the normal precision.
-       // Reference: J. R. Shewchuk, Adaptive Precision Floating-Point Arithmetic and
-       // Fast Robust Geometric Predicates, Discrete & Computational Geometry 18(3)
-       // 305–363 (1997).
-       // Code adapted from GeographicLib by Charles F. F. Karney,
-       // http://geographiclib.sourceforge.net/
-
-       function adder() {
-         return new Adder;
-       }
+       Response.error = function () {
+         var response = new Response(null, {
+           status: 0,
+           statusText: ''
+         });
+         response.type = 'error';
+         return response;
+       };

 
 

-       function Adder() {
-         this.reset();
-       }
+       var redirectStatuses = [301, 302, 303, 307, 308];

 
 

-       Adder.prototype = {
-         constructor: Adder,
-         reset: function() {
-           this.s = // rounded value
-           this.t = 0; // exact error
-         },
-         add: function(y) {
-           add(temp, y, this.t);
-           add(this, temp.s, this.s);
-           if (this.s) { this.t += temp.t; }
-           else { this.s = temp.t; }
-         },
-         valueOf: function() {
-           return this.s;
+       Response.redirect = function (url, status) {
+         if (redirectStatuses.indexOf(status) === -1) {
+           throw new RangeError('Invalid status code');

          }
          }

+
+         return new Response(null, {
+           status: status,
+           headers: {
+             location: url
+           }
+         });

        };
 
        };
 

-       var temp = new Adder;
+       var DOMException$1 = global$8.DOMException;

 
 

-       function add(adder, a, b) {
-         var x = adder.s = a + b,
-             bv = x - a,
-             av = x - bv;
-         adder.t = (a - av) + (b - bv);
-       }
+       try {
+         new DOMException$1();
+       } catch (err) {
+         DOMException$1 = function DOMException(message, name) {
+           this.message = message;
+           this.name = name;
+           var error = Error(message);
+           this.stack = error.stack;
+         };

 
 

-       var epsilon = 1e-6;
-       var epsilon2 = 1e-12;
-       var pi = Math.PI;
-       var halfPi = pi / 2;
-       var quarterPi = pi / 4;
-       var tau = pi * 2;
+         DOMException$1.prototype = Object.create(Error.prototype);
+         DOMException$1.prototype.constructor = DOMException$1;
+       }

 
 

-       var degrees = 180 / pi;
-       var radians = pi / 180;
+       function fetch$1(input, init) {
+         return new Promise(function (resolve, reject) {
+           var request = new Request(input, init);

 
 

-       var abs$2 = Math.abs;
-       var atan = Math.atan;
-       var atan2 = Math.atan2;
-       var cos = Math.cos;
-       var exp = Math.exp;
-       var log = Math.log;
-       var sin = Math.sin;
-       var sign$2 = Math.sign || function(x) { return x > 0 ? 1 : x < 0 ? -1 : 0; };
-       var sqrt = Math.sqrt;
-       var tan = Math.tan;
+           if (request.signal && request.signal.aborted) {
+             return reject(new DOMException$1('Aborted', 'AbortError'));
+           }

 
 

-       function acos(x) {
-         return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
-       }
+           var xhr = new XMLHttpRequest();

 
 

-       function asin(x) {
-         return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
-       }
+           function abortXhr() {
+             xhr.abort();
+           }

 
 

-       function noop$2() {}
+           xhr.onload = function () {
+             var options = {
+               status: xhr.status,
+               statusText: xhr.statusText,
+               headers: parseHeaders(xhr.getAllResponseHeaders() || '')
+             };
+             options.url = 'responseURL' in xhr ? xhr.responseURL : options.headers.get('X-Request-URL');
+             var body = 'response' in xhr ? xhr.response : xhr.responseText;
+             setTimeout(function () {
+               resolve(new Response(body, options));
+             }, 0);
+           };

 
 

-       function streamGeometry(geometry, stream) {
-         if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
-           streamGeometryType[geometry.type](geometry, stream);
-         }
-       }
+           xhr.onerror = function () {
+             setTimeout(function () {
+               reject(new TypeError('Network request failed'));
+             }, 0);
+           };

 
 

-       var streamObjectType = {
-         Feature: function(object, stream) {
-           streamGeometry(object.geometry, stream);
-         },
-         FeatureCollection: function(object, stream) {
-           var features = object.features, i = -1, n = features.length;
-           while (++i < n) { streamGeometry(features[i].geometry, stream); }
-         }
-       };
+           xhr.ontimeout = function () {
+             setTimeout(function () {
+               reject(new TypeError('Network request failed'));
+             }, 0);
+           };

 
 

-       var streamGeometryType = {
-         Sphere: function(object, stream) {
-           stream.sphere();
-         },
-         Point: function(object, stream) {
-           object = object.coordinates;
-           stream.point(object[0], object[1], object[2]);
-         },
-         MultiPoint: function(object, stream) {
-           var coordinates = object.coordinates, i = -1, n = coordinates.length;
-           while (++i < n) { object = coordinates[i], stream.point(object[0], object[1], object[2]); }
-         },
-         LineString: function(object, stream) {
-           streamLine(object.coordinates, stream, 0);
-         },
-         MultiLineString: function(object, stream) {
-           var coordinates = object.coordinates, i = -1, n = coordinates.length;
-           while (++i < n) { streamLine(coordinates[i], stream, 0); }
-         },
-         Polygon: function(object, stream) {
-           streamPolygon(object.coordinates, stream);
-         },
-         MultiPolygon: function(object, stream) {
-           var coordinates = object.coordinates, i = -1, n = coordinates.length;
-           while (++i < n) { streamPolygon(coordinates[i], stream); }
-         },
-         GeometryCollection: function(object, stream) {
-           var geometries = object.geometries, i = -1, n = geometries.length;
-           while (++i < n) { streamGeometry(geometries[i], stream); }
-         }
-       };
+           xhr.onabort = function () {
+             setTimeout(function () {
+               reject(new DOMException$1('Aborted', 'AbortError'));
+             }, 0);
+           };

 
 

-       function streamLine(coordinates, stream, closed) {
-         var i = -1, n = coordinates.length - closed, coordinate;
-         stream.lineStart();
-         while (++i < n) { coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]); }
-         stream.lineEnd();
-       }
+           function fixUrl(url) {
+             try {
+               return url === '' && global$8.location.href ? global$8.location.href : url;
+             } catch (e) {
+               return url;
+             }
+           }

 
 

-       function streamPolygon(coordinates, stream) {
-         var i = -1, n = coordinates.length;
-         stream.polygonStart();
-         while (++i < n) { streamLine(coordinates[i], stream, 1); }
-         stream.polygonEnd();
-       }
+           xhr.open(request.method, fixUrl(request.url), true);

 
 

-       function d3_geoStream(object, stream) {
-         if (object && streamObjectType.hasOwnProperty(object.type)) {
-           streamObjectType[object.type](object, stream);
-         } else {
-           streamGeometry(object, stream);
-         }
-       }
+           if (request.credentials === 'include') {
+             xhr.withCredentials = true;
+           } else if (request.credentials === 'omit') {
+             xhr.withCredentials = false;
+           }

 
 

-       var areaRingSum = adder();
+           if ('responseType' in xhr) {
+             if (support.blob) {
+               xhr.responseType = 'blob';
+             } else if (support.arrayBuffer && request.headers.get('Content-Type') && request.headers.get('Content-Type').indexOf('application/octet-stream') !== -1) {
+               xhr.responseType = 'arraybuffer';
+             }
+           }

 
 

-       var areaSum = adder(),
-           lambda00,
-           phi00,
-           lambda0,
-           cosPhi0,
-           sinPhi0;
+           if (init && _typeof(init.headers) === 'object' && !(init.headers instanceof Headers)) {
+             Object.getOwnPropertyNames(init.headers).forEach(function (name) {
+               xhr.setRequestHeader(name, normalizeValue(init.headers[name]));
+             });
+           } else {
+             request.headers.forEach(function (value, name) {
+               xhr.setRequestHeader(name, value);
+             });
+           }

 
 

-       var areaStream = {
-         point: noop$2,
-         lineStart: noop$2,
-         lineEnd: noop$2,
-         polygonStart: function() {
-           areaRingSum.reset();
-           areaStream.lineStart = areaRingStart;
-           areaStream.lineEnd = areaRingEnd;
-         },
-         polygonEnd: function() {
-           var areaRing = +areaRingSum;
-           areaSum.add(areaRing < 0 ? tau + areaRing : areaRing);
-           this.lineStart = this.lineEnd = this.point = noop$2;
-         },
-         sphere: function() {
-           areaSum.add(tau);
-         }
-       };
+           if (request.signal) {
+             request.signal.addEventListener('abort', abortXhr);

 
 

-       function areaRingStart() {
-         areaStream.point = areaPointFirst;
-       }
+             xhr.onreadystatechange = function () {
+               // DONE (success or failure)
+               if (xhr.readyState === 4) {
+                 request.signal.removeEventListener('abort', abortXhr);
+               }
+             };
+           }

 
 

-       function areaRingEnd() {
-         areaPoint(lambda00, phi00);
+           xhr.send(typeof request._bodyInit === 'undefined' ? null : request._bodyInit);
+         });

        }
        }

+       fetch$1.polyfill = true;

 
 

-       function areaPointFirst(lambda, phi) {
-         areaStream.point = areaPoint;
-         lambda00 = lambda, phi00 = phi;
-         lambda *= radians, phi *= radians;
-         lambda0 = lambda, cosPhi0 = cos(phi = phi / 2 + quarterPi), sinPhi0 = sin(phi);
+       if (!global$8.fetch) {
+         global$8.fetch = fetch$1;
+         global$8.Headers = Headers;
+         global$8.Request = Request;
+         global$8.Response = Response;

        }
 
        }
 

-       function areaPoint(lambda, phi) {
-         lambda *= radians, phi *= radians;
-         phi = phi / 2 + quarterPi; // half the angular distance from south pole
-
-         // Spherical excess E for a spherical triangle with vertices: south pole,
-         // previous point, current point.  Uses a formula derived from Cagnoli’s
-         // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
-         var dLambda = lambda - lambda0,
-             sdLambda = dLambda >= 0 ? 1 : -1,
-             adLambda = sdLambda * dLambda,
-             cosPhi = cos(phi),
-             sinPhi = sin(phi),
-             k = sinPhi0 * sinPhi,
-             u = cosPhi0 * cosPhi + k * cos(adLambda),
-             v = k * sdLambda * sin(adLambda);
-         areaRingSum.add(atan2(v, u));
+       var $$L = _export;
+       var DESCRIPTORS$7 = descriptors;
+       var objectDefinePropertyModile = objectDefineProperty;

 
 

-         // Advance the previous points.
-         lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
-       }
+       // `Object.defineProperty` method
+       // https://tc39.es/ecma262/#sec-object.defineproperty
+       $$L({ target: 'Object', stat: true, forced: !DESCRIPTORS$7, sham: !DESCRIPTORS$7 }, {
+         defineProperty: objectDefinePropertyModile.f
+       });

 
 

-       function d3_geoArea(object) {
-         areaSum.reset();
-         d3_geoStream(object, areaStream);
-         return areaSum * 2;
-       }
+       var $$K = _export;
+       var setPrototypeOf = objectSetPrototypeOf;

 
 

-       function spherical(cartesian) {
-         return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
-       }
+       // `Object.setPrototypeOf` method
+       // https://tc39.es/ecma262/#sec-object.setprototypeof
+       $$K({ target: 'Object', stat: true }, {
+         setPrototypeOf: setPrototypeOf
+       });

 
 

-       function cartesian(spherical) {
-         var lambda = spherical[0], phi = spherical[1], cosPhi = cos(phi);
-         return [cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi)];
-       }
+       var $$J = _export;
+       var fails$i = fails$N;
+       var toObject$5 = toObject$i;
+       var nativeGetPrototypeOf = objectGetPrototypeOf;
+       var CORRECT_PROTOTYPE_GETTER = correctPrototypeGetter;

 
 

-       function cartesianDot(a, b) {
-         return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
-       }
+       var FAILS_ON_PRIMITIVES$3 = fails$i(function () { nativeGetPrototypeOf(1); });

 
 

-       function cartesianCross(a, b) {
-         return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
-       }
+       // `Object.getPrototypeOf` method
+       // https://tc39.es/ecma262/#sec-object.getprototypeof
+       $$J({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$3, sham: !CORRECT_PROTOTYPE_GETTER }, {
+         getPrototypeOf: function getPrototypeOf(it) {
+           return nativeGetPrototypeOf(toObject$5(it));
+         }
+       });

 
 

-       // TODO return a
-       function cartesianAddInPlace(a, b) {
-         a[0] += b[0], a[1] += b[1], a[2] += b[2];
-       }
+       var aFunction$2 = aFunction$9;
+       var isObject$a = isObject$r;
+
+       var slice$2 = [].slice;
+       var factories = {};
+
+       var construct = function (C, argsLength, args) {
+         if (!(argsLength in factories)) {
+           for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';
+           // eslint-disable-next-line no-new-func -- we have no proper alternatives, IE8- only
+           factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');
+         } return factories[argsLength](C, args);
+       };
+
+       // `Function.prototype.bind` method implementation
+       // https://tc39.es/ecma262/#sec-function.prototype.bind
+       var functionBind = Function.bind || function bind(that /* , ...args */) {
+         var fn = aFunction$2(this);
+         var partArgs = slice$2.call(arguments, 1);
+         var boundFunction = function bound(/* args... */) {
+           var args = partArgs.concat(slice$2.call(arguments));
+           return this instanceof boundFunction ? construct(fn, args.length, args) : fn.apply(that, args);
+         };
+         if (isObject$a(fn.prototype)) boundFunction.prototype = fn.prototype;
+         return boundFunction;
+       };
+
+       var $$I = _export;
+       var getBuiltIn$1 = getBuiltIn$9;
+       var aFunction$1 = aFunction$9;
+       var anObject$3 = anObject$m;
+       var isObject$9 = isObject$r;
+       var create$5 = objectCreate;
+       var bind$4 = functionBind;
+       var fails$h = fails$N;
+
+       var nativeConstruct = getBuiltIn$1('Reflect', 'construct');
+
+       // `Reflect.construct` method
+       // https://tc39.es/ecma262/#sec-reflect.construct
+       // MS Edge supports only 2 arguments and argumentsList argument is optional
+       // FF Nightly sets third argument as `new.target`, but does not create `this` from it
+       var NEW_TARGET_BUG = fails$h(function () {
+         function F() { /* empty */ }
+         return !(nativeConstruct(function () { /* empty */ }, [], F) instanceof F);
+       });
+       var ARGS_BUG = !fails$h(function () {
+         nativeConstruct(function () { /* empty */ });
+       });
+       var FORCED$a = NEW_TARGET_BUG || ARGS_BUG;
+
+       $$I({ target: 'Reflect', stat: true, forced: FORCED$a, sham: FORCED$a }, {
+         construct: function construct(Target, args /* , newTarget */) {
+           aFunction$1(Target);
+           anObject$3(args);
+           var newTarget = arguments.length < 3 ? Target : aFunction$1(arguments[2]);
+           if (ARGS_BUG && !NEW_TARGET_BUG) return nativeConstruct(Target, args, newTarget);
+           if (Target == newTarget) {
+             // w/o altered newTarget, optimization for 0-4 arguments
+             switch (args.length) {
+               case 0: return new Target();
+               case 1: return new Target(args[0]);
+               case 2: return new Target(args[0], args[1]);
+               case 3: return new Target(args[0], args[1], args[2]);
+               case 4: return new Target(args[0], args[1], args[2], args[3]);
+             }
+             // w/o altered newTarget, lot of arguments case
+             var $args = [null];
+             $args.push.apply($args, args);
+             return new (bind$4.apply(Target, $args))();
+           }
+           // with altered newTarget, not support built-in constructors
+           var proto = newTarget.prototype;
+           var instance = create$5(isObject$9(proto) ? proto : Object.prototype);
+           var result = Function.apply.call(Target, instance, args);
+           return isObject$9(result) ? result : instance;
+         }
+       });

 
 

-       function cartesianScale(vector, k) {
-         return [vector[0] * k, vector[1] * k, vector[2] * k];
-       }
+       var $$H = _export;
+       var isObject$8 = isObject$r;
+       var anObject$2 = anObject$m;
+       var has$3 = has$j;
+       var getOwnPropertyDescriptorModule = objectGetOwnPropertyDescriptor;
+       var getPrototypeOf = objectGetPrototypeOf;
+
+       // `Reflect.get` method
+       // https://tc39.es/ecma262/#sec-reflect.get
+       function get$3(target, propertyKey /* , receiver */) {
+         var receiver = arguments.length < 3 ? target : arguments[2];
+         var descriptor, prototype;
+         if (anObject$2(target) === receiver) return target[propertyKey];
+         if (descriptor = getOwnPropertyDescriptorModule.f(target, propertyKey)) return has$3(descriptor, 'value')
+           ? descriptor.value
+           : descriptor.get === undefined
+             ? undefined
+             : descriptor.get.call(receiver);
+         if (isObject$8(prototype = getPrototypeOf(target))) return get$3(prototype, propertyKey, receiver);
+       }
+
+       $$H({ target: 'Reflect', stat: true }, {
+         get: get$3
+       });

 
 

-       // TODO return d
-       function cartesianNormalizeInPlace(d) {
-         var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
-         d[0] /= l, d[1] /= l, d[2] /= l;
-       }
+       var $$G = _export;
+       var fails$g = fails$N;
+       var toIndexedObject$1 = toIndexedObject$b;
+       var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+       var DESCRIPTORS$6 = descriptors;

 
 

-       var lambda0$1, phi0, lambda1, phi1, // bounds
-           lambda2, // previous lambda-coordinate
-           lambda00$1, phi00$1, // first point
-           p0, // previous 3D point
-           deltaSum = adder(),
-           ranges,
-           range;
+       var FAILS_ON_PRIMITIVES$2 = fails$g(function () { nativeGetOwnPropertyDescriptor(1); });
+       var FORCED$9 = !DESCRIPTORS$6 || FAILS_ON_PRIMITIVES$2;

 
 

-       var boundsStream = {
-         point: boundsPoint,
-         lineStart: boundsLineStart,
-         lineEnd: boundsLineEnd,
-         polygonStart: function() {
-           boundsStream.point = boundsRingPoint;
-           boundsStream.lineStart = boundsRingStart;
-           boundsStream.lineEnd = boundsRingEnd;
-           deltaSum.reset();
-           areaStream.polygonStart();
-         },
-         polygonEnd: function() {
-           areaStream.polygonEnd();
-           boundsStream.point = boundsPoint;
-           boundsStream.lineStart = boundsLineStart;
-           boundsStream.lineEnd = boundsLineEnd;
-           if (areaRingSum < 0) { lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90); }
-           else if (deltaSum > epsilon) { phi1 = 90; }
-           else if (deltaSum < -epsilon) { phi0 = -90; }
-           range[0] = lambda0$1, range[1] = lambda1;
-         },
-         sphere: function() {
-           lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
+       // `Object.getOwnPropertyDescriptor` method
+       // https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
+       $$G({ target: 'Object', stat: true, forced: FORCED$9, sham: !DESCRIPTORS$6 }, {
+         getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {
+           return nativeGetOwnPropertyDescriptor(toIndexedObject$1(it), key);

          }
          }

-       };
-
-       function boundsPoint(lambda, phi) {
-         ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
-         if (phi < phi0) { phi0 = phi; }
-         if (phi > phi1) { phi1 = phi; }
-       }
+       });

 
 

-       function linePoint(lambda, phi) {
-         var p = cartesian([lambda * radians, phi * radians]);
-         if (p0) {
-           var normal = cartesianCross(p0, p),
-               equatorial = [normal[1], -normal[0], 0],
-               inflection = cartesianCross(equatorial, normal);
-           cartesianNormalizeInPlace(inflection);
-           inflection = spherical(inflection);
-           var delta = lambda - lambda2,
-               sign = delta > 0 ? 1 : -1,
-               lambdai = inflection[0] * degrees * sign,
-               phii,
-               antimeridian = abs$2(delta) > 180;
-           if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
-             phii = inflection[1] * degrees;
-             if (phii > phi1) { phi1 = phii; }
-           } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
-             phii = -inflection[1] * degrees;
-             if (phii < phi0) { phi0 = phii; }
+       var $$F = _export;
+       var toAbsoluteIndex$1 = toAbsoluteIndex$8;
+       var toInteger$2 = toInteger$b;
+       var toLength$6 = toLength$q;
+       var toObject$4 = toObject$i;
+       var arraySpeciesCreate$1 = arraySpeciesCreate$3;
+       var createProperty$1 = createProperty$4;
+       var arrayMethodHasSpeciesSupport$2 = arrayMethodHasSpeciesSupport$5;
+
+       var HAS_SPECIES_SUPPORT$1 = arrayMethodHasSpeciesSupport$2('splice');
+
+       var max$1 = Math.max;
+       var min$3 = Math.min;
+       var MAX_SAFE_INTEGER$1 = 0x1FFFFFFFFFFFFF;
+       var MAXIMUM_ALLOWED_LENGTH_EXCEEDED = 'Maximum allowed length exceeded';
+
+       // `Array.prototype.splice` method
+       // https://tc39.es/ecma262/#sec-array.prototype.splice
+       // with adding support of @@species
+       $$F({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$1 }, {
+         splice: function splice(start, deleteCount /* , ...items */) {
+           var O = toObject$4(this);
+           var len = toLength$6(O.length);
+           var actualStart = toAbsoluteIndex$1(start, len);
+           var argumentsLength = arguments.length;
+           var insertCount, actualDeleteCount, A, k, from, to;
+           if (argumentsLength === 0) {
+             insertCount = actualDeleteCount = 0;
+           } else if (argumentsLength === 1) {
+             insertCount = 0;
+             actualDeleteCount = len - actualStart;

            } else {
            } else {

-             if (phi < phi0) { phi0 = phi; }
-             if (phi > phi1) { phi1 = phi; }
-           }
-           if (antimeridian) {
-             if (lambda < lambda2) {
-               if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) { lambda1 = lambda; }
-             } else {
-               if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) { lambda0$1 = lambda; }
+             insertCount = argumentsLength - 2;
+             actualDeleteCount = min$3(max$1(toInteger$2(deleteCount), 0), len - actualStart);
+           }
+           if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER$1) {
+             throw TypeError(MAXIMUM_ALLOWED_LENGTH_EXCEEDED);
+           }
+           A = arraySpeciesCreate$1(O, actualDeleteCount);
+           for (k = 0; k < actualDeleteCount; k++) {
+             from = actualStart + k;
+             if (from in O) createProperty$1(A, k, O[from]);
+           }
+           A.length = actualDeleteCount;
+           if (insertCount < actualDeleteCount) {
+             for (k = actualStart; k < len - actualDeleteCount; k++) {
+               from = k + actualDeleteCount;
+               to = k + insertCount;
+               if (from in O) O[to] = O[from];
+               else delete O[to];

              }
              }

-           } else {
-             if (lambda1 >= lambda0$1) {
-               if (lambda < lambda0$1) { lambda0$1 = lambda; }
-               if (lambda > lambda1) { lambda1 = lambda; }
-             } else {
-               if (lambda > lambda2) {
-                 if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) { lambda1 = lambda; }
-               } else {
-                 if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) { lambda0$1 = lambda; }
-               }
+             for (k = len; k > len - actualDeleteCount + insertCount; k--) delete O[k - 1];
+           } else if (insertCount > actualDeleteCount) {
+             for (k = len - actualDeleteCount; k > actualStart; k--) {
+               from = k + actualDeleteCount - 1;
+               to = k + insertCount - 1;
+               if (from in O) O[to] = O[from];
+               else delete O[to];

              }
            }
              }
            }

-         } else {
-           ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
+           for (k = 0; k < insertCount; k++) {
+             O[k + actualStart] = arguments[k + 2];
+           }
+           O.length = len - actualDeleteCount + insertCount;
+           return A;

          }
          }

-         if (phi < phi0) { phi0 = phi; }
-         if (phi > phi1) { phi1 = phi; }
-         p0 = p, lambda2 = lambda;
-       }
+       });

 
 

-       function boundsLineStart() {
-         boundsStream.point = linePoint;
-       }
+       var defineWellKnownSymbol$1 = defineWellKnownSymbol$4;

 
 

-       function boundsLineEnd() {
-         range[0] = lambda0$1, range[1] = lambda1;
-         boundsStream.point = boundsPoint;
-         p0 = null;
-       }
+       // `Symbol.toStringTag` well-known symbol
+       // https://tc39.es/ecma262/#sec-symbol.tostringtag
+       defineWellKnownSymbol$1('toStringTag');

 
 

-       function boundsRingPoint(lambda, phi) {
-         if (p0) {
-           var delta = lambda - lambda2;
-           deltaSum.add(abs$2(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
-         } else {
-           lambda00$1 = lambda, phi00$1 = phi;
-         }
-         areaStream.point(lambda, phi);
-         linePoint(lambda, phi);
-       }
+       var global$7 = global$F;
+       var setToStringTag$2 = setToStringTag$a;

 
 

-       function boundsRingStart() {
-         areaStream.lineStart();
-       }
+       // JSON[@@toStringTag] property
+       // https://tc39.es/ecma262/#sec-json-@@tostringtag
+       setToStringTag$2(global$7.JSON, 'JSON', true);

 
 

-       function boundsRingEnd() {
-         boundsRingPoint(lambda00$1, phi00$1);
-         areaStream.lineEnd();
-         if (abs$2(deltaSum) > epsilon) { lambda0$1 = -(lambda1 = 180); }
-         range[0] = lambda0$1, range[1] = lambda1;
-         p0 = null;
-       }
+       var setToStringTag$1 = setToStringTag$a;

 
 

-       // Finds the left-right distance between two longitudes.
-       // This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
-       // the distance between ±180° to be 360°.
-       function angle(lambda0, lambda1) {
-         return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;
-       }
+       // Math[@@toStringTag] property
+       // https://tc39.es/ecma262/#sec-math-@@tostringtag
+       setToStringTag$1(Math, 'Math', true);

 
 

-       function rangeCompare(a, b) {
-         return a[0] - b[0];
-       }
+       (function (factory) {
+         factory();
+       })(function () {

 
 

-       function rangeContains(range, x) {
-         return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;
-       }
+         function _classCallCheck(instance, Constructor) {
+           if (!(instance instanceof Constructor)) {
+             throw new TypeError("Cannot call a class as a function");
+           }
+         }

 
 

-       function d3_geoBounds(feature) {
-         var i, n, a, b, merged, deltaMax, delta;
+         function _defineProperties(target, props) {
+           for (var i = 0; i < props.length; i++) {
+             var descriptor = props[i];
+             descriptor.enumerable = descriptor.enumerable || false;
+             descriptor.configurable = true;
+             if ("value" in descriptor) descriptor.writable = true;
+             Object.defineProperty(target, descriptor.key, descriptor);
+           }
+         }

 
 

-         phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
-         ranges = [];
-         d3_geoStream(feature, boundsStream);
+         function _createClass(Constructor, protoProps, staticProps) {
+           if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+           if (staticProps) _defineProperties(Constructor, staticProps);
+           return Constructor;
+         }

 
 

-         // First, sort ranges by their minimum longitudes.
-         if (n = ranges.length) {
-           ranges.sort(rangeCompare);
+         function _inherits(subClass, superClass) {
+           if (typeof superClass !== "function" && superClass !== null) {
+             throw new TypeError("Super expression must either be null or a function");
+           }

 
 

-           // Then, merge any ranges that overlap.
-           for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
-             b = ranges[i];
-             if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
-               if (angle(a[0], b[1]) > angle(a[0], a[1])) { a[1] = b[1]; }
-               if (angle(b[0], a[1]) > angle(a[0], a[1])) { a[0] = b[0]; }
-             } else {
-               merged.push(a = b);
+           subClass.prototype = Object.create(superClass && superClass.prototype, {
+             constructor: {
+               value: subClass,
+               writable: true,
+               configurable: true

              }
              }

-           }
+           });
+           if (superClass) _setPrototypeOf(subClass, superClass);
+         }

 
 

-           // Finally, find the largest gap between the merged ranges.
-           // The final bounding box will be the inverse of this gap.
-           for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
-             b = merged[i];
-             if ((delta = angle(a[1], b[0])) > deltaMax) { deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1]; }
-           }
+         function _getPrototypeOf(o) {
+           _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf : function _getPrototypeOf(o) {
+             return o.__proto__ || Object.getPrototypeOf(o);
+           };
+           return _getPrototypeOf(o);

          }
 
          }
 

-         ranges = range = null;
+         function _setPrototypeOf(o, p) {
+           _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
+             o.__proto__ = p;
+             return o;
+           };

 
 

-         return lambda0$1 === Infinity || phi0 === Infinity
-             ? [[NaN, NaN], [NaN, NaN]]
-             : [[lambda0$1, phi0], [lambda1, phi1]];
-       }
+           return _setPrototypeOf(o, p);
+         }

 
 

-       var W0, W1,
-           X0, Y0, Z0,
-           X1, Y1, Z1,
-           X2, Y2, Z2,
-           lambda00$2, phi00$2, // first point
-           x0, y0, z0; // previous point
+         function _isNativeReflectConstruct() {
+           if (typeof Reflect === "undefined" || !Reflect.construct) return false;
+           if (Reflect.construct.sham) return false;
+           if (typeof Proxy === "function") return true;

 
 

-       var centroidStream = {
-         sphere: noop$2,
-         point: centroidPoint,
-         lineStart: centroidLineStart,
-         lineEnd: centroidLineEnd,
-         polygonStart: function() {
-           centroidStream.lineStart = centroidRingStart;
-           centroidStream.lineEnd = centroidRingEnd;
-         },
-         polygonEnd: function() {
-           centroidStream.lineStart = centroidLineStart;
-           centroidStream.lineEnd = centroidLineEnd;
+           try {
+             Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
+             return true;
+           } catch (e) {
+             return false;
+           }

          }
          }

-       };

 
 

-       // Arithmetic mean of Cartesian vectors.
-       function centroidPoint(lambda, phi) {
-         lambda *= radians, phi *= radians;
-         var cosPhi = cos(phi);
-         centroidPointCartesian(cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi));
-       }
+         function _assertThisInitialized(self) {
+           if (self === void 0) {
+             throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
+           }

 
 

-       function centroidPointCartesian(x, y, z) {
-         ++W0;
-         X0 += (x - X0) / W0;
-         Y0 += (y - Y0) / W0;
-         Z0 += (z - Z0) / W0;
-       }
+           return self;
+         }

 
 

-       function centroidLineStart() {
-         centroidStream.point = centroidLinePointFirst;
-       }
+         function _possibleConstructorReturn(self, call) {
+           if (call && (_typeof(call) === "object" || typeof call === "function")) {
+             return call;
+           }

 
 

-       function centroidLinePointFirst(lambda, phi) {
-         lambda *= radians, phi *= radians;
-         var cosPhi = cos(phi);
-         x0 = cosPhi * cos(lambda);
-         y0 = cosPhi * sin(lambda);
-         z0 = sin(phi);
-         centroidStream.point = centroidLinePoint;
-         centroidPointCartesian(x0, y0, z0);
-       }
+           return _assertThisInitialized(self);
+         }

 
 

-       function centroidLinePoint(lambda, phi) {
-         lambda *= radians, phi *= radians;
-         var cosPhi = cos(phi),
-             x = cosPhi * cos(lambda),
-             y = cosPhi * sin(lambda),
-             z = sin(phi),
-             w = atan2(sqrt((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
-         W1 += w;
-         X1 += w * (x0 + (x0 = x));
-         Y1 += w * (y0 + (y0 = y));
-         Z1 += w * (z0 + (z0 = z));
-         centroidPointCartesian(x0, y0, z0);
-       }
+         function _createSuper(Derived) {
+           var hasNativeReflectConstruct = _isNativeReflectConstruct();

 
 

-       function centroidLineEnd() {
-         centroidStream.point = centroidPoint;
-       }
+           return function _createSuperInternal() {
+             var Super = _getPrototypeOf(Derived),
+                 result;

 
 

-       // See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
-       // J. Applied Mechanics 42, 239 (1975).
-       function centroidRingStart() {
-         centroidStream.point = centroidRingPointFirst;
-       }
+             if (hasNativeReflectConstruct) {
+               var NewTarget = _getPrototypeOf(this).constructor;

 
 

-       function centroidRingEnd() {
-         centroidRingPoint(lambda00$2, phi00$2);
-         centroidStream.point = centroidPoint;
-       }
+               result = Reflect.construct(Super, arguments, NewTarget);
+             } else {
+               result = Super.apply(this, arguments);
+             }

 
 

-       function centroidRingPointFirst(lambda, phi) {
-         lambda00$2 = lambda, phi00$2 = phi;
-         lambda *= radians, phi *= radians;
-         centroidStream.point = centroidRingPoint;
-         var cosPhi = cos(phi);
-         x0 = cosPhi * cos(lambda);
-         y0 = cosPhi * sin(lambda);
-         z0 = sin(phi);
-         centroidPointCartesian(x0, y0, z0);
-       }
+             return _possibleConstructorReturn(this, result);
+           };
+         }

 
 

-       function centroidRingPoint(lambda, phi) {
-         lambda *= radians, phi *= radians;
-         var cosPhi = cos(phi),
-             x = cosPhi * cos(lambda),
-             y = cosPhi * sin(lambda),
-             z = sin(phi),
-             cx = y0 * z - z0 * y,
-             cy = z0 * x - x0 * z,
-             cz = x0 * y - y0 * x,
-             m = sqrt(cx * cx + cy * cy + cz * cz),
-             w = asin(m), // line weight = angle
-             v = m && -w / m; // area weight multiplier
-         X2 += v * cx;
-         Y2 += v * cy;
-         Z2 += v * cz;
-         W1 += w;
-         X1 += w * (x0 + (x0 = x));
-         Y1 += w * (y0 + (y0 = y));
-         Z1 += w * (z0 + (z0 = z));
-         centroidPointCartesian(x0, y0, z0);
-       }
-
-       function d3_geoCentroid(object) {
-         W0 = W1 =
-         X0 = Y0 = Z0 =
-         X1 = Y1 = Z1 =
-         X2 = Y2 = Z2 = 0;
-         d3_geoStream(object, centroidStream);
-
-         var x = X2,
-             y = Y2,
-             z = Z2,
-             m = x * x + y * y + z * z;
-
-         // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
-         if (m < epsilon2) {
-           x = X1, y = Y1, z = Z1;
-           // If the feature has zero length, fall back to arithmetic mean of point vectors.
-           if (W1 < epsilon) { x = X0, y = Y0, z = Z0; }
-           m = x * x + y * y + z * z;
-           // If the feature still has an undefined ccentroid, then return.
-           if (m < epsilon2) { return [NaN, NaN]; }
-         }
-
-         return [atan2(y, x) * degrees, asin(z / sqrt(m)) * degrees];
-       }
-
-       function compose(a, b) {
+         function _superPropBase(object, property) {
+           while (!Object.prototype.hasOwnProperty.call(object, property)) {
+             object = _getPrototypeOf(object);
+             if (object === null) break;
+           }

 
 

-         function compose(x, y) {
-           return x = a(x, y), b(x[0], x[1]);
+           return object;

          }
 
          }
 

-         if (a.invert && b.invert) { compose.invert = function(x, y) {
-           return x = b.invert(x, y), x && a.invert(x[0], x[1]);
-         }; }
+         function _get(target, property, receiver) {
+           if (typeof Reflect !== "undefined" && Reflect.get) {
+             _get = Reflect.get;
+           } else {
+             _get = function _get(target, property, receiver) {
+               var base = _superPropBase(target, property);

 
 

-         return compose;
-       }
+               if (!base) return;
+               var desc = Object.getOwnPropertyDescriptor(base, property);

 
 

-       function rotationIdentity(lambda, phi) {
-         return [abs$2(lambda) > pi ? lambda + Math.round(-lambda / tau) * tau : lambda, phi];
-       }
+               if (desc.get) {
+                 return desc.get.call(receiver);
+               }

 
 

-       rotationIdentity.invert = rotationIdentity;
+               return desc.value;
+             };
+           }

 
 

-       function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
-         return (deltaLambda %= tau) ? (deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma))
-           : rotationLambda(deltaLambda))
-           : (deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma)
-           : rotationIdentity);
-       }
-
-       function forwardRotationLambda(deltaLambda) {
-         return function(lambda, phi) {
-           return lambda += deltaLambda, [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];
-         };
-       }
-
-       function rotationLambda(deltaLambda) {
-         var rotation = forwardRotationLambda(deltaLambda);
-         rotation.invert = forwardRotationLambda(-deltaLambda);
-         return rotation;
-       }
-
-       function rotationPhiGamma(deltaPhi, deltaGamma) {
-         var cosDeltaPhi = cos(deltaPhi),
-             sinDeltaPhi = sin(deltaPhi),
-             cosDeltaGamma = cos(deltaGamma),
-             sinDeltaGamma = sin(deltaGamma);
-
-         function rotation(lambda, phi) {
-           var cosPhi = cos(phi),
-               x = cos(lambda) * cosPhi,
-               y = sin(lambda) * cosPhi,
-               z = sin(phi),
-               k = z * cosDeltaPhi + x * sinDeltaPhi;
-           return [
-             atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi),
-             asin(k * cosDeltaGamma + y * sinDeltaGamma)
-           ];
-         }
-
-         rotation.invert = function(lambda, phi) {
-           var cosPhi = cos(phi),
-               x = cos(lambda) * cosPhi,
-               y = sin(lambda) * cosPhi,
-               z = sin(phi),
-               k = z * cosDeltaGamma - y * sinDeltaGamma;
-           return [
-             atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi),
-             asin(k * cosDeltaPhi - x * sinDeltaPhi)
-           ];
-         };
-
-         return rotation;
-       }
-
-       function rotation(rotate) {
-         rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);
-
-         function forward(coordinates) {
-           coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
-           return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
-         }
-
-         forward.invert = function(coordinates) {
-           coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
-           return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
-         };
-
-         return forward;
-       }
-
-       // Generates a circle centered at [0°, 0°], with a given radius and precision.
-       function circleStream(stream, radius, delta, direction, t0, t1) {
-         if (!delta) { return; }
-         var cosRadius = cos(radius),
-             sinRadius = sin(radius),
-             step = direction * delta;
-         if (t0 == null) {
-           t0 = radius + direction * tau;
-           t1 = radius - step / 2;
-         } else {
-           t0 = circleRadius(cosRadius, t0);
-           t1 = circleRadius(cosRadius, t1);
-           if (direction > 0 ? t0 < t1 : t0 > t1) { t0 += direction * tau; }
-         }
-         for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
-           point = spherical([cosRadius, -sinRadius * cos(t), -sinRadius * sin(t)]);
-           stream.point(point[0], point[1]);
+           return _get(target, property, receiver || target);

          }
          }

-       }

 
 

-       // Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
-       function circleRadius(cosRadius, point) {
-         point = cartesian(point), point[0] -= cosRadius;
-         cartesianNormalizeInPlace(point);
-         var radius = acos(-point[1]);
-         return ((-point[2] < 0 ? -radius : radius) + tau - epsilon) % tau;
-       }
+         var Emitter = /*#__PURE__*/function () {
+           function Emitter() {
+             _classCallCheck(this, Emitter);

 
 

-       function clipBuffer() {
-         var lines = [],
-             line;
-         return {
-           point: function(x, y, m) {
-             line.push([x, y, m]);
-           },
-           lineStart: function() {
-             lines.push(line = []);
-           },
-           lineEnd: noop$2,
-           rejoin: function() {
-             if (lines.length > 1) { lines.push(lines.pop().concat(lines.shift())); }
-           },
-           result: function() {
-             var result = lines;
-             lines = [];
-             line = null;
-             return result;
+             Object.defineProperty(this, 'listeners', {
+               value: {},
+               writable: true,
+               configurable: true
+             });

            }
            }

-         };
-       }
-
-       function pointEqual(a, b) {
-         return abs$2(a[0] - b[0]) < epsilon && abs$2(a[1] - b[1]) < epsilon;
-       }
-
-       function Intersection(point, points, other, entry) {
-         this.x = point;
-         this.z = points;
-         this.o = other; // another intersection
-         this.e = entry; // is an entry?
-         this.v = false; // visited
-         this.n = this.p = null; // next & previous
-       }
-
-       // A generalized polygon clipping algorithm: given a polygon that has been cut
-       // into its visible line segments, and rejoins the segments by interpolating
-       // along the clip edge.
-       function clipRejoin(segments, compareIntersection, startInside, interpolate, stream) {
-         var subject = [],
-             clip = [],
-             i,
-             n;

 
 

-         segments.forEach(function(segment) {
-           if ((n = segment.length - 1) <= 0) { return; }
-           var n, p0 = segment[0], p1 = segment[n], x;
+           _createClass(Emitter, [{
+             key: "addEventListener",
+             value: function addEventListener(type, callback, options) {
+               if (!(type in this.listeners)) {
+                 this.listeners[type] = [];
+               }

 
 

-           if (pointEqual(p0, p1)) {
-             if (!p0[2] && !p1[2]) {
-               stream.lineStart();
-               for (i = 0; i < n; ++i) { stream.point((p0 = segment[i])[0], p0[1]); }
-               stream.lineEnd();
-               return;
+               this.listeners[type].push({
+                 callback: callback,
+                 options: options
+               });

              }
              }

-             // handle degenerate cases by moving the point
-             p1[0] += 2 * epsilon;
-           }
+           }, {
+             key: "removeEventListener",
+             value: function removeEventListener(type, callback) {
+               if (!(type in this.listeners)) {
+                 return;
+               }

 
 

-           subject.push(x = new Intersection(p0, segment, null, true));
-           clip.push(x.o = new Intersection(p0, null, x, false));
-           subject.push(x = new Intersection(p1, segment, null, false));
-           clip.push(x.o = new Intersection(p1, null, x, true));
-         });
+               var stack = this.listeners[type];

 
 

-         if (!subject.length) { return; }
+               for (var i = 0, l = stack.length; i < l; i++) {
+                 if (stack[i].callback === callback) {
+                   stack.splice(i, 1);
+                   return;
+                 }
+               }
+             }
+           }, {
+             key: "dispatchEvent",
+             value: function dispatchEvent(event) {
+               if (!(event.type in this.listeners)) {
+                 return;
+               }

 
 

-         clip.sort(compareIntersection);
-         link(subject);
-         link(clip);
+               var stack = this.listeners[event.type];
+               var stackToCall = stack.slice();

 
 

-         for (i = 0, n = clip.length; i < n; ++i) {
-           clip[i].e = startInside = !startInside;
-         }
+               for (var i = 0, l = stackToCall.length; i < l; i++) {
+                 var listener = stackToCall[i];

 
 

-         var start = subject[0],
-             points,
-             point;
+                 try {
+                   listener.callback.call(this, event);
+                 } catch (e) {
+                   Promise.resolve().then(function () {
+                     throw e;
+                   });
+                 }

 
 

-         while (1) {
-           // Find first unvisited intersection.
-           var current = start,
-               isSubject = true;
-           while (current.v) { if ((current = current.n) === start) { return; } }
-           points = current.z;
-           stream.lineStart();
-           do {
-             current.v = current.o.v = true;
-             if (current.e) {
-               if (isSubject) {
-                 for (i = 0, n = points.length; i < n; ++i) { stream.point((point = points[i])[0], point[1]); }
-               } else {
-                 interpolate(current.x, current.n.x, 1, stream);
-               }
-               current = current.n;
-             } else {
-               if (isSubject) {
-                 points = current.p.z;
-                 for (i = points.length - 1; i >= 0; --i) { stream.point((point = points[i])[0], point[1]); }
-               } else {
-                 interpolate(current.x, current.p.x, -1, stream);
+                 if (listener.options && listener.options.once) {
+                   this.removeEventListener(event.type, listener.callback);
+                 }

                }
                }

-               current = current.p;
+
+               return !event.defaultPrevented;

              }
              }

-             current = current.o;
-             points = current.z;
-             isSubject = !isSubject;
-           } while (!current.v);
-           stream.lineEnd();
-         }
-       }
+           }]);

 
 

-       function link(array) {
-         if (!(n = array.length)) { return; }
-         var n,
-             i = 0,
-             a = array[0],
-             b;
-         while (++i < n) {
-           a.n = b = array[i];
-           b.p = a;
-           a = b;
-         }
-         a.n = b = array[0];
-         b.p = a;
-       }
+           return Emitter;
+         }();

 
 

-       var sum = adder();
+         var AbortSignal = /*#__PURE__*/function (_Emitter) {
+           _inherits(AbortSignal, _Emitter);

 
 

-       function longitude(point) {
-         if (abs$2(point[0]) <= pi)
-           { return point[0]; }
-         else
-           { return sign$2(point[0]) * ((abs$2(point[0]) + pi) % tau - pi); }
-       }
+           var _super = _createSuper(AbortSignal);

 
 

-       function polygonContains(polygon, point) {
-         var lambda = longitude(point),
-             phi = point[1],
-             sinPhi = sin(phi),
-             normal = [sin(lambda), -cos(lambda), 0],
-             angle = 0,
-             winding = 0;
+           function AbortSignal() {
+             var _this;

 
 

-         sum.reset();
+             _classCallCheck(this, AbortSignal);

 
 

-         if (sinPhi === 1) { phi = halfPi + epsilon; }
-         else if (sinPhi === -1) { phi = -halfPi - epsilon; }
+             _this = _super.call(this); // Some versions of babel does not transpile super() correctly for IE <= 10, if the parent
+             // constructor has failed to run, then "this.listeners" will still be undefined and then we call
+             // the parent constructor directly instead as a workaround. For general details, see babel bug:
+             // https://github.com/babel/babel/issues/3041
+             // This hack was added as a fix for the issue described here:
+             // https://github.com/Financial-Times/polyfill-library/pull/59#issuecomment-477558042

 
 

-         for (var i = 0, n = polygon.length; i < n; ++i) {
-           if (!(m = (ring = polygon[i]).length)) { continue; }
-           var ring,
-               m,
-               point0 = ring[m - 1],
-               lambda0 = longitude(point0),
-               phi0 = point0[1] / 2 + quarterPi,
-               sinPhi0 = sin(phi0),
-               cosPhi0 = cos(phi0);
+             if (!_this.listeners) {
+               Emitter.call(_assertThisInitialized(_this));
+             } // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
+             // we want Object.keys(new AbortController().signal) to be [] for compat with the native impl

 
 

-           for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
-             var point1 = ring[j],
-                 lambda1 = longitude(point1),
-                 phi1 = point1[1] / 2 + quarterPi,
-                 sinPhi1 = sin(phi1),
-                 cosPhi1 = cos(phi1),
-                 delta = lambda1 - lambda0,
-                 sign = delta >= 0 ? 1 : -1,
-                 absDelta = sign * delta,
-                 antimeridian = absDelta > pi,
-                 k = sinPhi0 * sinPhi1;

 
 

-             sum.add(atan2(k * sign * sin(absDelta), cosPhi0 * cosPhi1 + k * cos(absDelta)));
-             angle += antimeridian ? delta + sign * tau : delta;
+             Object.defineProperty(_assertThisInitialized(_this), 'aborted', {
+               value: false,
+               writable: true,
+               configurable: true
+             });
+             Object.defineProperty(_assertThisInitialized(_this), 'onabort', {
+               value: null,
+               writable: true,
+               configurable: true
+             });
+             return _this;
+           }

 
 

-             // Are the longitudes either side of the point’s meridian (lambda),
-             // and are the latitudes smaller than the parallel (phi)?
-             if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
-               var arc = cartesianCross(cartesian(point0), cartesian(point1));
-               cartesianNormalizeInPlace(arc);
-               var intersection = cartesianCross(normal, arc);
-               cartesianNormalizeInPlace(intersection);
-               var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);
-               if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
-                 winding += antimeridian ^ delta >= 0 ? 1 : -1;
+           _createClass(AbortSignal, [{
+             key: "toString",
+             value: function toString() {
+               return '[object AbortSignal]';
+             }
+           }, {
+             key: "dispatchEvent",
+             value: function dispatchEvent(event) {
+               if (event.type === 'abort') {
+                 this.aborted = true;
+
+                 if (typeof this.onabort === 'function') {
+                   this.onabort.call(this, event);
+                 }

                }
                }

+
+               _get(_getPrototypeOf(AbortSignal.prototype), "dispatchEvent", this).call(this, event);

              }
              }

-           }
-         }
+           }]);

 
 

-         // First, determine whether the South pole is inside or outside:
-         //
-         // It is inside if:
-         // * the polygon winds around it in a clockwise direction.
-         // * the polygon does not (cumulatively) wind around it, but has a negative
-         //   (counter-clockwise) area.
-         //
-         // Second, count the (signed) number of times a segment crosses a lambda
-         // from the point to the South pole.  If it is zero, then the point is the
-         // same side as the South pole.
+           return AbortSignal;
+         }(Emitter);

 
 

-         return (angle < -epsilon || angle < epsilon && sum < -epsilon) ^ (winding & 1);
-       }
+         var AbortController = /*#__PURE__*/function () {
+           function AbortController() {
+             _classCallCheck(this, AbortController); // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
+             // we want Object.keys(new AbortController()) to be [] for compat with the native impl

 
 

-       function d3_ascending(a, b) {
-         return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
-       }

 
 

-       function d3_bisector(compare) {
-         if (compare.length === 1) { compare = ascendingComparator(compare); }
-         return {
-           left: function(a, x, lo, hi) {
-             if (lo == null) { lo = 0; }
-             if (hi == null) { hi = a.length; }
-             while (lo < hi) {
-               var mid = lo + hi >>> 1;
-               if (compare(a[mid], x) < 0) { lo = mid + 1; }
-               else { hi = mid; }
-             }
-             return lo;
-           },
-           right: function(a, x, lo, hi) {
-             if (lo == null) { lo = 0; }
-             if (hi == null) { hi = a.length; }
-             while (lo < hi) {
-               var mid = lo + hi >>> 1;
-               if (compare(a[mid], x) > 0) { hi = mid; }
-               else { lo = mid + 1; }
-             }
-             return lo;
+             Object.defineProperty(this, 'signal', {
+               value: new AbortSignal(),
+               writable: true,
+               configurable: true
+             });

            }
            }

-         };
-       }

 
 

-       function ascendingComparator(f) {
-         return function(d, x) {
-           return d3_ascending(f(d), x);
-         };
-       }
+           _createClass(AbortController, [{
+             key: "abort",
+             value: function abort() {
+               var event;

 
 

-       var ascendingBisect = d3_bisector(d3_ascending);
-       var bisectRight = ascendingBisect.right;
+               try {
+                 event = new Event('abort');
+               } catch (e) {
+                 if (typeof document !== 'undefined') {
+                   if (!document.createEvent) {
+                     // For Internet Explorer 8:
+                     event = document.createEventObject();
+                     event.type = 'abort';
+                   } else {
+                     // For Internet Explorer 11:
+                     event = document.createEvent('Event');
+                     event.initEvent('abort', false, false);
+                   }
+                 } else {
+                   // Fallback where document isn't available:
+                   event = {
+                     type: 'abort',
+                     bubbles: false,
+                     cancelable: false
+                   };
+                 }
+               }

 
 

-       function d3_descending(a, b) {
-         return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
-       }
+               this.signal.dispatchEvent(event);
+             }
+           }, {
+             key: "toString",
+             value: function toString() {
+               return '[object AbortController]';
+             }
+           }]);

 
 

-       function number(x) {
-         return x === null ? NaN : +x;
-       }
+           return AbortController;
+         }();

 
 

-       function range$1(start, stop, step) {
-         start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
+         if (typeof Symbol !== 'undefined' && Symbol.toStringTag) {
+           // These are necessary to make sure that we get correct output for:
+           // Object.prototype.toString.call(new AbortController())
+           AbortController.prototype[Symbol.toStringTag] = 'AbortController';
+           AbortSignal.prototype[Symbol.toStringTag] = 'AbortSignal';
+         }

 
 

-         var i = -1,
-             n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
-             range = new Array(n);
+         function polyfillNeeded(self) {
+           if (self.__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL) {
+             console.log('__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL=true is set, will force install polyfill');
+             return true;
+           } // Note that the "unfetch" minimal fetch polyfill defines fetch() without
+           // defining window.Request, and this polyfill need to work on top of unfetch
+           // so the below feature detection needs the !self.AbortController part.
+           // The Request.prototype check is also needed because Safari versions 11.1.2
+           // up to and including 12.1.x has a window.AbortController present but still
+           // does NOT correctly implement abortable fetch:
+           // https://bugs.webkit.org/show_bug.cgi?id=174980#c2

 
 

-         while (++i < n) {
-           range[i] = start + i * step;
+
+           return typeof self.Request === 'function' && !self.Request.prototype.hasOwnProperty('signal') || !self.AbortController;

          }
          }

+         /**
+          * Note: the "fetch.Request" default value is available for fetch imported from
+          * the "node-fetch" package and not in browsers. This is OK since browsers
+          * will be importing umd-polyfill.js from that path "self" is passed the
+          * decorator so the default value will not be used (because browsers that define
+          * fetch also has Request). One quirky setup where self.fetch exists but
+          * self.Request does not is when the "unfetch" minimal fetch polyfill is used
+          * on top of IE11; for this case the browser will try to use the fetch.Request
+          * default value which in turn will be undefined but then then "if (Request)"
+          * will ensure that you get a patched fetch but still no Request (as expected).
+          * @param {fetch, Request = fetch.Request}
+          * @returns {fetch: abortableFetch, Request: AbortableRequest}
+          */

 
 

-         return range;
-       }

 
 

-       var e10 = Math.sqrt(50),
-           e5 = Math.sqrt(10),
-           e2 = Math.sqrt(2);
+         function abortableFetchDecorator(patchTargets) {
+           if ('function' === typeof patchTargets) {
+             patchTargets = {
+               fetch: patchTargets
+             };
+           }

 
 

-       function ticks(start, stop, count) {
-         var reverse,
-             i = -1,
-             n,
-             ticks,
-             step;
+           var _patchTargets = patchTargets,
+               fetch = _patchTargets.fetch,
+               _patchTargets$Request = _patchTargets.Request,
+               NativeRequest = _patchTargets$Request === void 0 ? fetch.Request : _patchTargets$Request,
+               NativeAbortController = _patchTargets.AbortController,
+               _patchTargets$__FORCE = _patchTargets.__FORCE_INSTALL_ABORTCONTROLLER_POLYFILL,
+               __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL = _patchTargets$__FORCE === void 0 ? false : _patchTargets$__FORCE;

 
 

-         stop = +stop, start = +start, count = +count;
-         if (start === stop && count > 0) { return [start]; }
-         if (reverse = stop < start) { n = start, start = stop, stop = n; }
-         if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) { return []; }
+           if (!polyfillNeeded({
+             fetch: fetch,
+             Request: NativeRequest,
+             AbortController: NativeAbortController,
+             __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL: __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL
+           })) {
+             return {
+               fetch: fetch,
+               Request: Request
+             };
+           }

 
 

-         if (step > 0) {
-           start = Math.ceil(start / step);
-           stop = Math.floor(stop / step);
-           ticks = new Array(n = Math.ceil(stop - start + 1));
-           while (++i < n) { ticks[i] = (start + i) * step; }
-         } else {
-           start = Math.floor(start * step);
-           stop = Math.ceil(stop * step);
-           ticks = new Array(n = Math.ceil(start - stop + 1));
-           while (++i < n) { ticks[i] = (start - i) / step; }
-         }
+           var Request = NativeRequest; // Note that the "unfetch" minimal fetch polyfill defines fetch() without
+           // defining window.Request, and this polyfill need to work on top of unfetch
+           // hence we only patch it if it's available. Also we don't patch it if signal
+           // is already available on the Request prototype because in this case support
+           // is present and the patching below can cause a crash since it assigns to
+           // request.signal which is technically a read-only property. This latter error
+           // happens when you run the main5.js node-fetch example in the repo
+           // "abortcontroller-polyfill-examples". The exact error is:
+           //   request.signal = init.signal;
+           //   ^
+           // TypeError: Cannot set property signal of #<Request> which has only a getter

 
 

-         if (reverse) { ticks.reverse(); }
+           if (Request && !Request.prototype.hasOwnProperty('signal') || __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL) {
+             Request = function Request(input, init) {
+               var signal;

 
 

-         return ticks;
-       }
+               if (init && init.signal) {
+                 signal = init.signal; // Never pass init.signal to the native Request implementation when the polyfill has
+                 // been installed because if we're running on top of a browser with a
+                 // working native AbortController (i.e. the polyfill was installed due to
+                 // __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL being set), then passing our
+                 // fake AbortSignal to the native fetch will trigger:
+                 // TypeError: Failed to construct 'Request': member signal is not of type AbortSignal.

 
 

-       function tickIncrement(start, stop, count) {
-         var step = (stop - start) / Math.max(0, count),
-             power = Math.floor(Math.log(step) / Math.LN10),
-             error = step / Math.pow(10, power);
-         return power >= 0
-             ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power)
-             : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);
-       }
+                 delete init.signal;
+               }

 
 

-       function tickStep(start, stop, count) {
-         var step0 = Math.abs(stop - start) / Math.max(0, count),
-             step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
-             error = step0 / step1;
-         if (error >= e10) { step1 *= 10; }
-         else if (error >= e5) { step1 *= 5; }
-         else if (error >= e2) { step1 *= 2; }
-         return stop < start ? -step1 : step1;
-       }
+               var request = new NativeRequest(input, init);

 
 

-       function threshold(values, p, valueof) {
-         if (valueof == null) { valueof = number; }
-         if (!(n = values.length)) { return; }
-         if ((p = +p) <= 0 || n < 2) { return +valueof(values[0], 0, values); }
-         if (p >= 1) { return +valueof(values[n - 1], n - 1, values); }
-         var n,
-             i = (n - 1) * p,
-             i0 = Math.floor(i),
-             value0 = +valueof(values[i0], i0, values),
-             value1 = +valueof(values[i0 + 1], i0 + 1, values);
-         return value0 + (value1 - value0) * (i - i0);
-       }
+               if (signal) {
+                 Object.defineProperty(request, 'signal', {
+                   writable: false,
+                   enumerable: false,
+                   configurable: true,
+                   value: signal
+                 });
+               }

 
 

-       function d3_median(values, valueof) {
-         var n = values.length,
-             i = -1,
-             value,
-             numbers = [];
+               return request;
+             };

 
 

-         if (valueof == null) {
-           while (++i < n) {
-             if (!isNaN(value = number(values[i]))) {
-               numbers.push(value);
-             }
+             Request.prototype = NativeRequest.prototype;

            }
            }

-         }

 
 

-         else {
-           while (++i < n) {
-             if (!isNaN(value = number(valueof(values[i], i, values)))) {
-               numbers.push(value);
-             }
-           }
-         }
+           var realFetch = fetch;

 
 

-         return threshold(numbers.sort(d3_ascending), 0.5);
-       }
+           var abortableFetch = function abortableFetch(input, init) {
+             var signal = Request && Request.prototype.isPrototypeOf(input) ? input.signal : init ? init.signal : undefined;

 
 

-       function merge(arrays) {
-         var n = arrays.length,
-             m,
-             i = -1,
-             j = 0,
-             merged,
-             array;
+             if (signal) {
+               var abortError;

 
 

-         while (++i < n) { j += arrays[i].length; }
-         merged = new Array(j);
+               try {
+                 abortError = new DOMException('Aborted', 'AbortError');
+               } catch (err) {
+                 // IE 11 does not support calling the DOMException constructor, use a
+                 // regular error object on it instead.
+                 abortError = new Error('Aborted');
+                 abortError.name = 'AbortError';
+               } // Return early if already aborted, thus avoiding making an HTTP request

 
 

-         while (--n >= 0) {
-           array = arrays[n];
-           m = array.length;
-           while (--m >= 0) {
-             merged[--j] = array[m];
-           }
-         }

 
 

-         return merged;
-       }
+               if (signal.aborted) {
+                 return Promise.reject(abortError);
+               } // Turn an event into a promise, reject it once `abort` is dispatched

 
 

-       function clip(pointVisible, clipLine, interpolate, start) {
-         return function(sink) {
-           var line = clipLine(sink),
-               ringBuffer = clipBuffer(),
-               ringSink = clipLine(ringBuffer),
-               polygonStarted = false,
-               polygon,
-               segments,
-               ring;

 
 

-           var clip = {
-             point: point,
-             lineStart: lineStart,
-             lineEnd: lineEnd,
-             polygonStart: function() {
-               clip.point = pointRing;
-               clip.lineStart = ringStart;
-               clip.lineEnd = ringEnd;
-               segments = [];
-               polygon = [];
-             },
-             polygonEnd: function() {
-               clip.point = point;
-               clip.lineStart = lineStart;
-               clip.lineEnd = lineEnd;
-               segments = merge(segments);
-               var startInside = polygonContains(polygon, start);
-               if (segments.length) {
-                 if (!polygonStarted) { sink.polygonStart(), polygonStarted = true; }
-                 clipRejoin(segments, compareIntersection, startInside, interpolate, sink);
-               } else if (startInside) {
-                 if (!polygonStarted) { sink.polygonStart(), polygonStarted = true; }
-                 sink.lineStart();
-                 interpolate(null, null, 1, sink);
-                 sink.lineEnd();
-               }
-               if (polygonStarted) { sink.polygonEnd(), polygonStarted = false; }
-               segments = polygon = null;
-             },
-             sphere: function() {
-               sink.polygonStart();
-               sink.lineStart();
-               interpolate(null, null, 1, sink);
-               sink.lineEnd();
-               sink.polygonEnd();
+               var cancellation = new Promise(function (_, reject) {
+                 signal.addEventListener('abort', function () {
+                   return reject(abortError);
+                 }, {
+                   once: true
+                 });
+               });
+
+               if (init && init.signal) {
+                 // Never pass .signal to the native implementation when the polyfill has
+                 // been installed because if we're running on top of a browser with a
+                 // working native AbortController (i.e. the polyfill was installed due to
+                 // __FORCE_INSTALL_ABORTCONTROLLER_POLYFILL being set), then passing our
+                 // fake AbortSignal to the native fetch will trigger:
+                 // TypeError: Failed to execute 'fetch' on 'Window': member signal is not of type AbortSignal.
+                 delete init.signal;
+               } // Return the fastest promise (don't need to wait for request to finish)
+
+
+               return Promise.race([cancellation, realFetch(input, init)]);

              }
              }

+
+             return realFetch(input, init);

            };
 
            };
 

-           function point(lambda, phi) {
-             if (pointVisible(lambda, phi)) { sink.point(lambda, phi); }
-           }
+           return {
+             fetch: abortableFetch,
+             Request: Request
+           };
+         }

 
 

-           function pointLine(lambda, phi) {
-             line.point(lambda, phi);
+         (function (self) {
+           if (!polyfillNeeded(self)) {
+             return;

            }
 
            }
 

-           function lineStart() {
-             clip.point = pointLine;
-             line.lineStart();
+           if (!self.fetch) {
+             console.warn('fetch() is not available, cannot install abortcontroller-polyfill');
+             return;

            }
 
            }
 

-           function lineEnd() {
-             clip.point = point;
-             line.lineEnd();
-           }
+           var _abortableFetch = abortableFetchDecorator(self),
+               fetch = _abortableFetch.fetch,
+               Request = _abortableFetch.Request;

 
 

-           function pointRing(lambda, phi) {
-             ring.push([lambda, phi]);
-             ringSink.point(lambda, phi);
-           }
+           self.fetch = fetch;
+           self.Request = Request;
+           Object.defineProperty(self, 'AbortController', {
+             writable: true,
+             enumerable: false,
+             configurable: true,
+             value: AbortController
+           });
+           Object.defineProperty(self, 'AbortSignal', {
+             writable: true,
+             enumerable: false,
+             configurable: true,
+             value: AbortSignal
+           });
+         })(typeof self !== 'undefined' ? self : commonjsGlobal);
+       });

 
 

-           function ringStart() {
-             ringSink.lineStart();
-             ring = [];
+       function actionAddEntity(way) {
+         return function (graph) {
+           return graph.replace(way);
+         };
+       }
+
+       var $$E = _export;
+       var fails$f = fails$N;
+       var isArray$1 = isArray$6;
+       var isObject$7 = isObject$r;
+       var toObject$3 = toObject$i;
+       var toLength$5 = toLength$q;
+       var createProperty = createProperty$4;
+       var arraySpeciesCreate = arraySpeciesCreate$3;
+       var arrayMethodHasSpeciesSupport$1 = arrayMethodHasSpeciesSupport$5;
+       var wellKnownSymbol$2 = wellKnownSymbol$s;
+       var V8_VERSION = engineV8Version;
+
+       var IS_CONCAT_SPREADABLE = wellKnownSymbol$2('isConcatSpreadable');
+       var MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;
+       var MAXIMUM_ALLOWED_INDEX_EXCEEDED = 'Maximum allowed index exceeded';
+
+       // We can't use this feature detection in V8 since it causes
+       // deoptimization and serious performance degradation
+       // https://github.com/zloirock/core-js/issues/679
+       var IS_CONCAT_SPREADABLE_SUPPORT = V8_VERSION >= 51 || !fails$f(function () {
+         var array = [];
+         array[IS_CONCAT_SPREADABLE] = false;
+         return array.concat()[0] !== array;
+       });
+
+       var SPECIES_SUPPORT = arrayMethodHasSpeciesSupport$1('concat');
+
+       var isConcatSpreadable = function (O) {
+         if (!isObject$7(O)) return false;
+         var spreadable = O[IS_CONCAT_SPREADABLE];
+         return spreadable !== undefined ? !!spreadable : isArray$1(O);
+       };
+
+       var FORCED$8 = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT;
+
+       // `Array.prototype.concat` method
+       // https://tc39.es/ecma262/#sec-array.prototype.concat
+       // with adding support of @@isConcatSpreadable and @@species
+       $$E({ target: 'Array', proto: true, forced: FORCED$8 }, {
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         concat: function concat(arg) {
+           var O = toObject$3(this);
+           var A = arraySpeciesCreate(O, 0);
+           var n = 0;
+           var i, k, length, len, E;
+           for (i = -1, length = arguments.length; i < length; i++) {
+             E = i === -1 ? O : arguments[i];
+             if (isConcatSpreadable(E)) {
+               len = toLength$5(E.length);
+               if (n + len > MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
+               for (k = 0; k < len; k++, n++) if (k in E) createProperty(A, n, E[k]);
+             } else {
+               if (n >= MAX_SAFE_INTEGER) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
+               createProperty(A, n++, E);
+             }

            }
            }

+           A.length = n;
+           return A;
+         }
+       });

 
 

-           function ringEnd() {
-             pointRing(ring[0][0], ring[0][1]);
-             ringSink.lineEnd();
+       var $$D = _export;
+       var assign$1 = objectAssign;

 
 

-             var clean = ringSink.clean(),
-                 ringSegments = ringBuffer.result(),
-                 i, n = ringSegments.length, m,
-                 segment,
-                 point;
+       // `Object.assign` method
+       // https://tc39.es/ecma262/#sec-object.assign
+       // eslint-disable-next-line es/no-object-assign -- required for testing
+       $$D({ target: 'Object', stat: true, forced: Object.assign !== assign$1 }, {
+         assign: assign$1
+       });

 
 

-             ring.pop();
-             polygon.push(ring);
-             ring = null;
+       var $$C = _export;
+       var $filter = arrayIteration.filter;
+       var arrayMethodHasSpeciesSupport = arrayMethodHasSpeciesSupport$5;

 
 

-             if (!n) { return; }
+       var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('filter');

 
 

-             // No intersections.
-             if (clean & 1) {
-               segment = ringSegments[0];
-               if ((m = segment.length - 1) > 0) {
-                 if (!polygonStarted) { sink.polygonStart(), polygonStarted = true; }
-                 sink.lineStart();
-                 for (i = 0; i < m; ++i) { sink.point((point = segment[i])[0], point[1]); }
-                 sink.lineEnd();
-               }
-               return;
-             }
+       // `Array.prototype.filter` method
+       // https://tc39.es/ecma262/#sec-array.prototype.filter
+       // with adding support of @@species
+       $$C({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {
+         filter: function filter(callbackfn /* , thisArg */) {
+           return $filter(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });

 
 

-             // Rejoin connected segments.
-             // TODO reuse ringBuffer.rejoin()?
-             if (n > 1 && clean & 2) { ringSegments.push(ringSegments.pop().concat(ringSegments.shift())); }
+       var $$B = _export;
+       var toObject$2 = toObject$i;
+       var nativeKeys = objectKeys$4;
+       var fails$e = fails$N;

 
 

-             segments.push(ringSegments.filter(validSegment));
-           }
+       var FAILS_ON_PRIMITIVES$1 = fails$e(function () { nativeKeys(1); });

 
 

-           return clip;
-         };
-       }
+       // `Object.keys` method
+       // https://tc39.es/ecma262/#sec-object.keys
+       $$B({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$1 }, {
+         keys: function keys(it) {
+           return nativeKeys(toObject$2(it));
+         }
+       });

 
 

-       function validSegment(segment) {
-         return segment.length > 1;
-       }
+       var $$A = _export;
+       var isArray = isArray$6;

 
 

-       // Intersections are sorted along the clip edge. For both antimeridian cutting
-       // and circle clipping, the same comparison is used.
-       function compareIntersection(a, b) {
-         return ((a = a.x)[0] < 0 ? a[1] - halfPi - epsilon : halfPi - a[1])
-              - ((b = b.x)[0] < 0 ? b[1] - halfPi - epsilon : halfPi - b[1]);
-       }
+       var nativeReverse = [].reverse;
+       var test$1 = [1, 2];

 
 

-       var clipAntimeridian = clip(
-         function() { return true; },
-         clipAntimeridianLine,
-         clipAntimeridianInterpolate,
-         [-pi, -halfPi]
-       );
+       // `Array.prototype.reverse` method
+       // https://tc39.es/ecma262/#sec-array.prototype.reverse
+       // fix for Safari 12.0 bug
+       // https://bugs.webkit.org/show_bug.cgi?id=188794
+       $$A({ target: 'Array', proto: true, forced: String(test$1) === String(test$1.reverse()) }, {
+         reverse: function reverse() {
+           // eslint-disable-next-line no-self-assign -- dirty hack
+           if (isArray(this)) this.length = this.length;
+           return nativeReverse.call(this);
+         }
+       });

 
 

-       // Takes a line and cuts into visible segments. Return values: 0 - there were
-       // intersections or the line was empty; 1 - no intersections; 2 - there were
-       // intersections, and the first and last segments should be rejoined.
-       function clipAntimeridianLine(stream) {
-         var lambda0 = NaN,
-             phi0 = NaN,
-             sign0 = NaN,
-             clean; // no intersections
+       var global$6 = global$F;
+       var trim$4 = stringTrim.trim;
+       var whitespaces$1 = whitespaces$4;

 
 

-         return {
-           lineStart: function() {
-             stream.lineStart();
-             clean = 1;
-           },
-           point: function(lambda1, phi1) {
-             var sign1 = lambda1 > 0 ? pi : -pi,
-                 delta = abs$2(lambda1 - lambda0);
-             if (abs$2(delta - pi) < epsilon) { // line crosses a pole
-               stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi : -halfPi);
-               stream.point(sign0, phi0);
-               stream.lineEnd();
-               stream.lineStart();
-               stream.point(sign1, phi0);
-               stream.point(lambda1, phi0);
-               clean = 0;
-             } else if (sign0 !== sign1 && delta >= pi) { // line crosses antimeridian
-               if (abs$2(lambda0 - sign0) < epsilon) { lambda0 -= sign0 * epsilon; } // handle degeneracies
-               if (abs$2(lambda1 - sign1) < epsilon) { lambda1 -= sign1 * epsilon; }
-               phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
-               stream.point(sign0, phi0);
-               stream.lineEnd();
-               stream.lineStart();
-               stream.point(sign1, phi0);
-               clean = 0;
-             }
-             stream.point(lambda0 = lambda1, phi0 = phi1);
-             sign0 = sign1;
-           },
-           lineEnd: function() {
-             stream.lineEnd();
-             lambda0 = phi0 = NaN;
-           },
-           clean: function() {
-             return 2 - clean; // if intersections, rejoin first and last segments
-           }
-         };
-       }
+       var $parseFloat = global$6.parseFloat;
+       var FORCED$7 = 1 / $parseFloat(whitespaces$1 + '-0') !== -Infinity;

 
 

-       function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
-         var cosPhi0,
-             cosPhi1,
-             sinLambda0Lambda1 = sin(lambda0 - lambda1);
-         return abs$2(sinLambda0Lambda1) > epsilon
-             ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1)
-                 - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0))
-                 / (cosPhi0 * cosPhi1 * sinLambda0Lambda1))
-             : (phi0 + phi1) / 2;
-       }
+       // `parseFloat` method
+       // https://tc39.es/ecma262/#sec-parsefloat-string
+       var numberParseFloat = FORCED$7 ? function parseFloat(string) {
+         var trimmedString = trim$4(String(string));
+         var result = $parseFloat(trimmedString);
+         return result === 0 && trimmedString.charAt(0) == '-' ? -0 : result;
+       } : $parseFloat;

 
 

-       function clipAntimeridianInterpolate(from, to, direction, stream) {
-         var phi;
-         if (from == null) {
-           phi = direction * halfPi;
-           stream.point(-pi, phi);
-           stream.point(0, phi);
-           stream.point(pi, phi);
-           stream.point(pi, 0);
-           stream.point(pi, -phi);
-           stream.point(0, -phi);
-           stream.point(-pi, -phi);
-           stream.point(-pi, 0);
-           stream.point(-pi, phi);
-         } else if (abs$2(from[0] - to[0]) > epsilon) {
-           var lambda = from[0] < to[0] ? pi : -pi;
-           phi = direction * lambda / 2;
-           stream.point(-lambda, phi);
-           stream.point(0, phi);
-           stream.point(lambda, phi);
-         } else {
-           stream.point(to[0], to[1]);
-         }
-       }
+       var $$z = _export;
+       var parseFloatImplementation = numberParseFloat;

 
 

-       function clipCircle(radius) {
-         var cr = cos(radius),
-             delta = 6 * radians,
-             smallRadius = cr > 0,
-             notHemisphere = abs$2(cr) > epsilon; // TODO optimise for this common case
+       // `parseFloat` method
+       // https://tc39.es/ecma262/#sec-parsefloat-string
+       $$z({ global: true, forced: parseFloat != parseFloatImplementation }, {
+         parseFloat: parseFloatImplementation
+       });

 
 

-         function interpolate(from, to, direction, stream) {
-           circleStream(stream, radius, delta, direction, from, to);
-         }
+       /*
+       Order the nodes of a way in reverse order and reverse any direction dependent tags
+       other than `oneway`. (We assume that correcting a backwards oneway is the primary
+       reason for reversing a way.)

 
 

-         function visible(lambda, phi) {
-           return cos(lambda) * cos(phi) > cr;
+       In addition, numeric-valued `incline` tags are negated.
+
+       The JOSM implementation was used as a guide, but transformations that were of unclear benefit
+       or adjusted tags that don't seem to be used in practice were omitted.
+
+       References:
+           http://wiki.openstreetmap.org/wiki/Forward_%26_backward,_left_%26_right
+           http://wiki.openstreetmap.org/wiki/Key:direction#Steps
+           http://wiki.openstreetmap.org/wiki/Key:incline
+           http://wiki.openstreetmap.org/wiki/Route#Members
+           http://josm.openstreetmap.de/browser/josm/trunk/src/org/openstreetmap/josm/corrector/ReverseWayTagCorrector.java
+           http://wiki.openstreetmap.org/wiki/Tag:highway%3Dstop
+           http://wiki.openstreetmap.org/wiki/Key:traffic_sign#On_a_way_or_area
+       */
+       function actionReverse(entityID, options) {
+         var ignoreKey = /^.*(_|:)?(description|name|note|website|ref|source|comment|watch|attribution)(_|:)?/;
+         var numeric = /^([+\-]?)(?=[\d.])/;
+         var directionKey = /direction$/;
+         var turn_lanes = /^turn:lanes:?/;
+         var keyReplacements = [[/:right$/, ':left'], [/:left$/, ':right'], [/:forward$/, ':backward'], [/:backward$/, ':forward'], [/:right:/, ':left:'], [/:left:/, ':right:'], [/:forward:/, ':backward:'], [/:backward:/, ':forward:']];
+         var valueReplacements = {
+           left: 'right',
+           right: 'left',
+           up: 'down',
+           down: 'up',
+           forward: 'backward',
+           backward: 'forward',
+           forwards: 'backward',
+           backwards: 'forward'
+         };
+         var roleReplacements = {
+           forward: 'backward',
+           backward: 'forward',
+           forwards: 'backward',
+           backwards: 'forward'
+         };
+         var onewayReplacements = {
+           yes: '-1',
+           '1': '-1',
+           '-1': 'yes'
+         };
+         var compassReplacements = {
+           N: 'S',
+           NNE: 'SSW',
+           NE: 'SW',
+           ENE: 'WSW',
+           E: 'W',
+           ESE: 'WNW',
+           SE: 'NW',
+           SSE: 'NNW',
+           S: 'N',
+           SSW: 'NNE',
+           SW: 'NE',
+           WSW: 'ENE',
+           W: 'E',
+           WNW: 'ESE',
+           NW: 'SE',
+           NNW: 'SSE'
+         };
+
+         function reverseKey(key) {
+           for (var i = 0; i < keyReplacements.length; ++i) {
+             var replacement = keyReplacements[i];
+
+             if (replacement[0].test(key)) {
+               return key.replace(replacement[0], replacement[1]);
+             }
+           }
+
+           return key;

          }
 
          }
 

-         // Takes a line and cuts into visible segments. Return values used for polygon
-         // clipping: 0 - there were intersections or the line was empty; 1 - no
-         // intersections 2 - there were intersections, and the first and last segments
-         // should be rejoined.
-         function clipLine(stream) {
-           var point0, // previous point
-               c0, // code for previous point
-               v0, // visibility of previous point
-               v00, // visibility of first point
-               clean; // no intersections
-           return {
-             lineStart: function() {
-               v00 = v0 = false;
-               clean = 1;
-             },
-             point: function(lambda, phi) {
-               var point1 = [lambda, phi],
-                   point2,
-                   v = visible(lambda, phi),
-                   c = smallRadius
-                     ? v ? 0 : code(lambda, phi)
-                     : v ? code(lambda + (lambda < 0 ? pi : -pi), phi) : 0;
-               if (!point0 && (v00 = v0 = v)) { stream.lineStart(); }
-               if (v !== v0) {
-                 point2 = intersect(point0, point1);
-                 if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2))
-                   { point1[2] = 1; }
-               }
-               if (v !== v0) {
-                 clean = 0;
-                 if (v) {
-                   // outside going in
-                   stream.lineStart();
-                   point2 = intersect(point1, point0);
-                   stream.point(point2[0], point2[1]);
-                 } else {
-                   // inside going out
-                   point2 = intersect(point0, point1);
-                   stream.point(point2[0], point2[1], 2);
-                   stream.lineEnd();
-                 }
-                 point0 = point2;
-               } else if (notHemisphere && point0 && smallRadius ^ v) {
-                 var t;
-                 // If the codes for two points are different, or are both zero,
-                 // and there this segment intersects with the small circle.
-                 if (!(c & c0) && (t = intersect(point1, point0, true))) {
-                   clean = 0;
-                   if (smallRadius) {
-                     stream.lineStart();
-                     stream.point(t[0][0], t[0][1]);
-                     stream.point(t[1][0], t[1][1]);
-                     stream.lineEnd();
-                   } else {
-                     stream.point(t[1][0], t[1][1]);
-                     stream.lineEnd();
-                     stream.lineStart();
-                     stream.point(t[0][0], t[0][1], 3);
-                   }
-                 }
-               }
-               if (v && (!point0 || !pointEqual(point0, point1))) {
-                 stream.point(point1[0], point1[1]);
+         function reverseValue(key, value, includeAbsolute) {
+           if (ignoreKey.test(key)) return value; // Turn lanes are left/right to key (not way) direction - #5674
+
+           if (turn_lanes.test(key)) {
+             return value;
+           } else if (key === 'incline' && numeric.test(value)) {
+             return value.replace(numeric, function (_, sign) {
+               return sign === '-' ? '' : '-';
+             });
+           } else if (options && options.reverseOneway && key === 'oneway') {
+             return onewayReplacements[value] || value;
+           } else if (includeAbsolute && directionKey.test(key)) {
+             if (compassReplacements[value]) return compassReplacements[value];
+             var degrees = parseFloat(value);
+
+             if (typeof degrees === 'number' && !isNaN(degrees)) {
+               if (degrees < 180) {
+                 degrees += 180;
+               } else {
+                 degrees -= 180;

                }
                }

-               point0 = point1, v0 = v, c0 = c;
-             },
-             lineEnd: function() {
-               if (v0) { stream.lineEnd(); }
-               point0 = null;
-             },
-             // Rejoin first and last segments if there were intersections and the first
-             // and last points were visible.
-             clean: function() {
-               return clean | ((v00 && v0) << 1);
+
+               return degrees.toString();

              }
              }

-           };
-         }
+           }

 
 

-         // Intersects the great circle between a and b with the clip circle.
-         function intersect(a, b, two) {
-           var pa = cartesian(a),
-               pb = cartesian(b);
+           return valueReplacements[value] || value;
+         } // Reverse the direction of tags attached to the nodes - #3076

 
 

-           // We have two planes, n1.p = d1 and n2.p = d2.
-           // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
-           var n1 = [1, 0, 0], // normal
-               n2 = cartesianCross(pa, pb),
-               n2n2 = cartesianDot(n2, n2),
-               n1n2 = n2[0], // cartesianDot(n1, n2),
-               determinant = n2n2 - n1n2 * n1n2;

 
 

-           // Two polar points.
-           if (!determinant) { return !two && a; }
+         function reverseNodeTags(graph, nodeIDs) {
+           for (var i = 0; i < nodeIDs.length; i++) {
+             var node = graph.hasEntity(nodeIDs[i]);
+             if (!node || !Object.keys(node.tags).length) continue;
+             var tags = {};

 
 

-           var c1 =  cr * n2n2 / determinant,
-               c2 = -cr * n1n2 / determinant,
-               n1xn2 = cartesianCross(n1, n2),
-               A = cartesianScale(n1, c1),
-               B = cartesianScale(n2, c2);
-           cartesianAddInPlace(A, B);
+             for (var key in node.tags) {
+               tags[reverseKey(key)] = reverseValue(key, node.tags[key], node.id === entityID);
+             }

 
 

-           // Solve |p(t)|^2 = 1.
-           var u = n1xn2,
-               w = cartesianDot(A, u),
-               uu = cartesianDot(u, u),
-               t2 = w * w - uu * (cartesianDot(A, A) - 1);
+             graph = graph.replace(node.update({
+               tags: tags
+             }));
+           }

 
 

-           if (t2 < 0) { return; }
+           return graph;
+         }

 
 

-           var t = sqrt(t2),
-               q = cartesianScale(u, (-w - t) / uu);
-           cartesianAddInPlace(q, A);
-           q = spherical(q);
+         function reverseWay(graph, way) {
+           var nodes = way.nodes.slice().reverse();
+           var tags = {};
+           var role;

 
 

-           if (!two) { return q; }
+           for (var key in way.tags) {
+             tags[reverseKey(key)] = reverseValue(key, way.tags[key]);
+           }

 
 

-           // Two intersection points.
-           var lambda0 = a[0],
-               lambda1 = b[0],
-               phi0 = a[1],
-               phi1 = b[1],
-               z;
+           graph.parentRelations(way).forEach(function (relation) {
+             relation.members.forEach(function (member, index) {
+               if (member.id === way.id && (role = roleReplacements[member.role])) {
+                 relation = relation.updateMember({
+                   role: role
+                 }, index);
+                 graph = graph.replace(relation);
+               }
+             });
+           }); // Reverse any associated directions on nodes on the way and then replace
+           // the way itself with the reversed node ids and updated way tags

 
 

-           if (lambda1 < lambda0) { z = lambda0, lambda0 = lambda1, lambda1 = z; }
+           return reverseNodeTags(graph, nodes).replace(way.update({
+             nodes: nodes,
+             tags: tags
+           }));
+         }

 
 

-           var delta = lambda1 - lambda0,
-               polar = abs$2(delta - pi) < epsilon,
-               meridian = polar || delta < epsilon;
+         var action = function action(graph) {
+           var entity = graph.entity(entityID);

 
 

-           if (!polar && phi1 < phi0) { z = phi0, phi0 = phi1, phi1 = z; }
+           if (entity.type === 'way') {
+             return reverseWay(graph, entity);
+           }

 
 

-           // Check that the first point is between a and b.
-           if (meridian
-               ? polar
-                 ? phi0 + phi1 > 0 ^ q[1] < (abs$2(q[0] - lambda0) < epsilon ? phi0 : phi1)
-                 : phi0 <= q[1] && q[1] <= phi1
-               : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
-             var q1 = cartesianScale(u, (-w + t) / uu);
-             cartesianAddInPlace(q1, A);
-             return [q, spherical(q1)];
+           return reverseNodeTags(graph, [entityID]);
+         };
+
+         action.disabled = function (graph) {
+           var entity = graph.hasEntity(entityID);
+           if (!entity || entity.type === 'way') return false;
+
+           for (var key in entity.tags) {
+             var value = entity.tags[key];
+
+             if (reverseKey(key) !== key || reverseValue(key, value, true) !== value) {
+               return false;
+             }

            }
            }

-         }

 
 

-         // Generates a 4-bit vector representing the location of a point relative to
-         // the small circle's bounding box.
-         function code(lambda, phi) {
-           var r = smallRadius ? radius : pi - radius,
-               code = 0;
-           if (lambda < -r) { code |= 1; } // left
-           else if (lambda > r) { code |= 2; } // right
-           if (phi < -r) { code |= 4; } // below
-           else if (phi > r) { code |= 8; } // above
-           return code;
-         }
+           return 'nondirectional_node';
+         };

 
 

-         return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi, radius - pi]);
+         action.entityID = function () {
+           return entityID;
+         };
+
+         return action;

        }
 
        }
 

-       function clipLine(a, b, x0, y0, x1, y1) {
-         var ax = a[0],
-             ay = a[1],
-             bx = b[0],
-             by = b[1],
-             t0 = 0,
-             t1 = 1,
-             dx = bx - ax,
-             dy = by - ay,
-             r;
+       function osmIsInterestingTag(key) {
+         return key !== 'attribution' && key !== 'created_by' && key !== 'source' && key !== 'odbl' && key.indexOf('source:') !== 0 && key.indexOf('source_ref') !== 0 && // purposely exclude colon
+         key.indexOf('tiger:') !== 0;
+       }
+       var osmAreaKeys = {};
+       function osmSetAreaKeys(value) {
+         osmAreaKeys = value;
+       } // returns an object with the tag from `tags` that implies an area geometry, if any

 
 

-         r = x0 - ax;
-         if (!dx && r > 0) { return; }
-         r /= dx;
-         if (dx < 0) {
-           if (r < t0) { return; }
-           if (r < t1) { t1 = r; }
-         } else if (dx > 0) {
-           if (r > t1) { return; }
-           if (r > t0) { t0 = r; }
-         }
+       function osmTagSuggestingArea(tags) {
+         if (tags.area === 'yes') return {
+           area: 'yes'
+         };
+         if (tags.area === 'no') return null; // `highway` and `railway` are typically linear features, but there
+         // are a few exceptions that should be treated as areas, even in the
+         // absence of a proper `area=yes` or `areaKeys` tag.. see #4194

 
 

-         r = x1 - ax;
-         if (!dx && r < 0) { return; }
-         r /= dx;
-         if (dx < 0) {
-           if (r > t1) { return; }
-           if (r > t0) { t0 = r; }
-         } else if (dx > 0) {
-           if (r < t0) { return; }
-           if (r < t1) { t1 = r; }
-         }
+         var lineKeys = {
+           highway: {
+             rest_area: true,
+             services: true
+           },
+           railway: {
+             roundhouse: true,
+             station: true,
+             traverser: true,
+             turntable: true,
+             wash: true
+           }
+         };
+         var returnTags = {};

 
 

-         r = y0 - ay;
-         if (!dy && r > 0) { return; }
-         r /= dy;
-         if (dy < 0) {
-           if (r < t0) { return; }
-           if (r < t1) { t1 = r; }
-         } else if (dy > 0) {
-           if (r > t1) { return; }
-           if (r > t0) { t0 = r; }
-         }
+         for (var key in tags) {
+           if (key in osmAreaKeys && !(tags[key] in osmAreaKeys[key])) {
+             returnTags[key] = tags[key];
+             return returnTags;
+           }

 
 

-         r = y1 - ay;
-         if (!dy && r < 0) { return; }
-         r /= dy;
-         if (dy < 0) {
-           if (r > t1) { return; }
-           if (r > t0) { t0 = r; }
-         } else if (dy > 0) {
-           if (r < t0) { return; }
-           if (r < t1) { t1 = r; }
+           if (key in lineKeys && tags[key] in lineKeys[key]) {
+             returnTags[key] = tags[key];
+             return returnTags;
+           }

          }
 
          }
 

-         if (t0 > 0) { a[0] = ax + t0 * dx, a[1] = ay + t0 * dy; }
-         if (t1 < 1) { b[0] = ax + t1 * dx, b[1] = ay + t1 * dy; }
-         return true;
+         return null;
+       } // Tags that indicate a node can be a standalone point
+       // e.g. { amenity: { bar: true, parking: true, ... } ... }
+
+       var osmPointTags = {};
+       function osmSetPointTags(value) {
+         osmPointTags = value;
+       } // Tags that indicate a node can be part of a way
+       // e.g. { amenity: { parking: true, ... }, highway: { stop: true ... } ... }
+
+       var osmVertexTags = {};
+       function osmSetVertexTags(value) {
+         osmVertexTags = value;

        }
        }

+       function osmNodeGeometriesForTags(nodeTags) {
+         var geometries = {};

 
 

-       var clipMax = 1e9, clipMin = -clipMax;
+         for (var key in nodeTags) {
+           if (osmPointTags[key] && (osmPointTags[key]['*'] || osmPointTags[key][nodeTags[key]])) {
+             geometries.point = true;
+           }

 
 

-       // TODO Use d3-polygon’s polygonContains here for the ring check?
-       // TODO Eliminate duplicate buffering in clipBuffer and polygon.push?
+           if (osmVertexTags[key] && (osmVertexTags[key]['*'] || osmVertexTags[key][nodeTags[key]])) {
+             geometries.vertex = true;
+           } // break early if both are already supported

 
 

-       function clipRectangle(x0, y0, x1, y1) {

 
 

-         function visible(x, y) {
-           return x0 <= x && x <= x1 && y0 <= y && y <= y1;
+           if (geometries.point && geometries.vertex) break;

          }
 
          }
 

-         function interpolate(from, to, direction, stream) {
-           var a = 0, a1 = 0;
-           if (from == null
-               || (a = corner(from, direction)) !== (a1 = corner(to, direction))
-               || comparePoint(from, to) < 0 ^ direction > 0) {
-             do { stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0); }
-             while ((a = (a + direction + 4) % 4) !== a1);
-           } else {
-             stream.point(to[0], to[1]);
-           }
+         return geometries;
+       }
+       var osmOneWayTags = {
+         'aerialway': {
+           'chair_lift': true,
+           'drag_lift': true,
+           'j-bar': true,
+           'magic_carpet': true,
+           'mixed_lift': true,
+           'platter': true,
+           'rope_tow': true,
+           't-bar': true,
+           'zip_line': true
+         },
+         'highway': {
+           'motorway': true
+         },
+         'junction': {
+           'circular': true,
+           'roundabout': true
+         },
+         'man_made': {
+           'goods_conveyor': true,
+           'piste:halfpipe': true
+         },
+         'piste:type': {
+           'downhill': true,
+           'sled': true,
+           'yes': true
+         },
+         'waterway': {
+           'canal': true,
+           'ditch': true,
+           'drain': true,
+           'fish_pass': true,
+           'river': true,
+           'stream': true,
+           'tidal_channel': true

          }
          }

+       }; // solid and smooth surfaces akin to the assumed default road surface in OSM

 
 

-         function corner(p, direction) {
-           return abs$2(p[0] - x0) < epsilon ? direction > 0 ? 0 : 3
-               : abs$2(p[0] - x1) < epsilon ? direction > 0 ? 2 : 1
-               : abs$2(p[1] - y0) < epsilon ? direction > 0 ? 1 : 0
-               : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
+       var osmPavedTags = {
+         'surface': {
+           'paved': true,
+           'asphalt': true,
+           'concrete': true,
+           'concrete:lanes': true,
+           'concrete:plates': true
+         },
+         'tracktype': {
+           'grade1': true

          }
          }

+       }; // solid, if somewhat uncommon surfaces with a high range of smoothness

 
 

-         function compareIntersection(a, b) {
-           return comparePoint(a.x, b.x);
+       var osmSemipavedTags = {
+         'surface': {
+           'cobblestone': true,
+           'cobblestone:flattened': true,
+           'unhewn_cobblestone': true,
+           'sett': true,
+           'paving_stones': true,
+           'metal': true,
+           'wood': true

          }
          }

-
-         function comparePoint(a, b) {
-           var ca = corner(a, 1),
-               cb = corner(b, 1);
-           return ca !== cb ? ca - cb
-               : ca === 0 ? b[1] - a[1]
-               : ca === 1 ? a[0] - b[0]
-               : ca === 2 ? a[1] - b[1]
-               : b[0] - a[0];
+       };
+       var osmRightSideIsInsideTags = {
+         'natural': {
+           'cliff': true,
+           'coastline': 'coastline'
+         },
+         'barrier': {
+           'retaining_wall': true,
+           'kerb': true,
+           'guard_rail': true,
+           'city_wall': true
+         },
+         'man_made': {
+           'embankment': true
+         },
+         'waterway': {
+           'weir': true

          }
          }

+       }; // "highway" tag values for pedestrian or vehicle right-of-ways that make up the routable network
+       // (does not include `raceway`)

 
 

-         return function(stream) {
-           var activeStream = stream,
-               bufferStream = clipBuffer(),
-               segments,
-               polygon,
-               ring,
-               x__, y__, v__, // first point
-               x_, y_, v_, // previous point
-               first,
-               clean;
+       var osmRoutableHighwayTagValues = {
+         motorway: true,
+         trunk: true,
+         primary: true,
+         secondary: true,
+         tertiary: true,
+         residential: true,
+         motorway_link: true,
+         trunk_link: true,
+         primary_link: true,
+         secondary_link: true,
+         tertiary_link: true,
+         unclassified: true,
+         road: true,
+         service: true,
+         track: true,
+         living_street: true,
+         bus_guideway: true,
+         path: true,
+         footway: true,
+         cycleway: true,
+         bridleway: true,
+         pedestrian: true,
+         corridor: true,
+         steps: true
+       }; // "highway" tag values that generally do not allow motor vehicles

 
 

-           var clipStream = {
-             point: point,
-             lineStart: lineStart,
-             lineEnd: lineEnd,
-             polygonStart: polygonStart,
-             polygonEnd: polygonEnd
-           };
+       var osmPathHighwayTagValues = {
+         path: true,
+         footway: true,
+         cycleway: true,
+         bridleway: true,
+         pedestrian: true,
+         corridor: true,
+         steps: true
+       }; // "railway" tag values representing existing railroad tracks (purposely does not include 'abandoned')

 
 

-           function point(x, y) {
-             if (visible(x, y)) { activeStream.point(x, y); }
-           }
+       var osmRailwayTrackTagValues = {
+         rail: true,
+         light_rail: true,
+         tram: true,
+         subway: true,
+         monorail: true,
+         funicular: true,
+         miniature: true,
+         narrow_gauge: true,
+         disused: true,
+         preserved: true
+       }; // "waterway" tag values for line features representing water flow

 
 

-           function polygonInside() {
-             var winding = 0;
+       var osmFlowingWaterwayTagValues = {
+         canal: true,
+         ditch: true,
+         drain: true,
+         fish_pass: true,
+         river: true,
+         stream: true,
+         tidal_channel: true
+       };
+
+       var global$5 = global$F;
+       var trim$3 = stringTrim.trim;
+       var whitespaces = whitespaces$4;
+
+       var $parseInt = global$5.parseInt;
+       var hex$2 = /^[+-]?0[Xx]/;
+       var FORCED$6 = $parseInt(whitespaces + '08') !== 8 || $parseInt(whitespaces + '0x16') !== 22;
+
+       // `parseInt` method
+       // https://tc39.es/ecma262/#sec-parseint-string-radix
+       var numberParseInt = FORCED$6 ? function parseInt(string, radix) {
+         var S = trim$3(String(string));
+         return $parseInt(S, (radix >>> 0) || (hex$2.test(S) ? 16 : 10));
+       } : $parseInt;
+
+       var $$y = _export;
+       var parseIntImplementation = numberParseInt;
+
+       // `parseInt` method
+       // https://tc39.es/ecma262/#sec-parseint-string-radix
+       $$y({ global: true, forced: parseInt != parseIntImplementation }, {
+         parseInt: parseIntImplementation
+       });

 
 

-             for (var i = 0, n = polygon.length; i < n; ++i) {
-               for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
-                 a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
-                 if (a1 <= y1) { if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) { ++winding; } }
-                 else { if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) { --winding; } }
-               }
-             }
+       var internalMetadata = {exports: {}};

 
 

-             return winding;
-           }
+       var fails$d = fails$N;

 
 

-           // Buffer geometry within a polygon and then clip it en masse.
-           function polygonStart() {
-             activeStream = bufferStream, segments = [], polygon = [], clean = true;
-           }
+       var freezing = !fails$d(function () {
+         // eslint-disable-next-line es/no-object-isextensible, es/no-object-preventextensions -- required for testing
+         return Object.isExtensible(Object.preventExtensions({}));
+       });

 
 

-           function polygonEnd() {
-             var startInside = polygonInside(),
-                 cleanInside = clean && startInside,
-                 visible = (segments = merge(segments)).length;
-             if (cleanInside || visible) {
-               stream.polygonStart();
-               if (cleanInside) {
-                 stream.lineStart();
-                 interpolate(null, null, 1, stream);
-                 stream.lineEnd();
-               }
-               if (visible) {
-                 clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
-               }
-               stream.polygonEnd();
+       var hiddenKeys = hiddenKeys$6;
+       var isObject$6 = isObject$r;
+       var has$2 = has$j;
+       var defineProperty$3 = objectDefineProperty.f;
+       var uid = uid$5;
+       var FREEZING$1 = freezing;
+
+       var METADATA = uid('meta');
+       var id$1 = 0;
+
+       // eslint-disable-next-line es/no-object-isextensible -- safe
+       var isExtensible = Object.isExtensible || function () {
+         return true;
+       };
+
+       var setMetadata = function (it) {
+         defineProperty$3(it, METADATA, { value: {
+           objectID: 'O' + ++id$1, // object ID
+           weakData: {}          // weak collections IDs
+         } });
+       };
+
+       var fastKey$1 = function (it, create) {
+         // return a primitive with prefix
+         if (!isObject$6(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;
+         if (!has$2(it, METADATA)) {
+           // can't set metadata to uncaught frozen object
+           if (!isExtensible(it)) return 'F';
+           // not necessary to add metadata
+           if (!create) return 'E';
+           // add missing metadata
+           setMetadata(it);
+         // return object ID
+         } return it[METADATA].objectID;
+       };
+
+       var getWeakData = function (it, create) {
+         if (!has$2(it, METADATA)) {
+           // can't set metadata to uncaught frozen object
+           if (!isExtensible(it)) return true;
+           // not necessary to add metadata
+           if (!create) return false;
+           // add missing metadata
+           setMetadata(it);
+         // return the store of weak collections IDs
+         } return it[METADATA].weakData;
+       };
+
+       // add metadata on freeze-family methods calling
+       var onFreeze$1 = function (it) {
+         if (FREEZING$1 && meta.REQUIRED && isExtensible(it) && !has$2(it, METADATA)) setMetadata(it);
+         return it;
+       };
+
+       var meta = internalMetadata.exports = {
+         REQUIRED: false,
+         fastKey: fastKey$1,
+         getWeakData: getWeakData,
+         onFreeze: onFreeze$1
+       };
+
+       hiddenKeys[METADATA] = true;
+
+       var $$x = _export;
+       var global$4 = global$F;
+       var isForced$2 = isForced_1;
+       var redefine$3 = redefine$g.exports;
+       var InternalMetadataModule = internalMetadata.exports;
+       var iterate$1 = iterate$3;
+       var anInstance$1 = anInstance$7;
+       var isObject$5 = isObject$r;
+       var fails$c = fails$N;
+       var checkCorrectnessOfIteration$1 = checkCorrectnessOfIteration$4;
+       var setToStringTag = setToStringTag$a;
+       var inheritIfRequired$2 = inheritIfRequired$4;
+
+       var collection$2 = function (CONSTRUCTOR_NAME, wrapper, common) {
+         var IS_MAP = CONSTRUCTOR_NAME.indexOf('Map') !== -1;
+         var IS_WEAK = CONSTRUCTOR_NAME.indexOf('Weak') !== -1;
+         var ADDER = IS_MAP ? 'set' : 'add';
+         var NativeConstructor = global$4[CONSTRUCTOR_NAME];
+         var NativePrototype = NativeConstructor && NativeConstructor.prototype;
+         var Constructor = NativeConstructor;
+         var exported = {};
+
+         var fixMethod = function (KEY) {
+           var nativeMethod = NativePrototype[KEY];
+           redefine$3(NativePrototype, KEY,
+             KEY == 'add' ? function add(value) {
+               nativeMethod.call(this, value === 0 ? 0 : value);
+               return this;
+             } : KEY == 'delete' ? function (key) {
+               return IS_WEAK && !isObject$5(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);
+             } : KEY == 'get' ? function get(key) {
+               return IS_WEAK && !isObject$5(key) ? undefined : nativeMethod.call(this, key === 0 ? 0 : key);
+             } : KEY == 'has' ? function has(key) {
+               return IS_WEAK && !isObject$5(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);
+             } : function set(key, value) {
+               nativeMethod.call(this, key === 0 ? 0 : key, value);
+               return this;

              }
              }

-             activeStream = stream, segments = polygon = ring = null;
-           }
+           );
+         };

 
 

-           function lineStart() {
-             clipStream.point = linePoint;
-             if (polygon) { polygon.push(ring = []); }
-             first = true;
-             v_ = false;
-             x_ = y_ = NaN;
+         var REPLACE = isForced$2(
+           CONSTRUCTOR_NAME,
+           typeof NativeConstructor != 'function' || !(IS_WEAK || NativePrototype.forEach && !fails$c(function () {
+             new NativeConstructor().entries().next();
+           }))
+         );
+
+         if (REPLACE) {
+           // create collection constructor
+           Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER);
+           InternalMetadataModule.REQUIRED = true;
+         } else if (isForced$2(CONSTRUCTOR_NAME, true)) {
+           var instance = new Constructor();
+           // early implementations not supports chaining
+           var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance;
+           // V8 ~ Chromium 40- weak-collections throws on primitives, but should return false
+           var THROWS_ON_PRIMITIVES = fails$c(function () { instance.has(1); });
+           // most early implementations doesn't supports iterables, most modern - not close it correctly
+           // eslint-disable-next-line no-new -- required for testing
+           var ACCEPT_ITERABLES = checkCorrectnessOfIteration$1(function (iterable) { new NativeConstructor(iterable); });
+           // for early implementations -0 and +0 not the same
+           var BUGGY_ZERO = !IS_WEAK && fails$c(function () {
+             // V8 ~ Chromium 42- fails only with 5+ elements
+             var $instance = new NativeConstructor();
+             var index = 5;
+             while (index--) $instance[ADDER](index, index);
+             return !$instance.has(-0);
+           });
+
+           if (!ACCEPT_ITERABLES) {
+             Constructor = wrapper(function (dummy, iterable) {
+               anInstance$1(dummy, Constructor, CONSTRUCTOR_NAME);
+               var that = inheritIfRequired$2(new NativeConstructor(), dummy, Constructor);
+               if (iterable != undefined) iterate$1(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
+               return that;
+             });
+             Constructor.prototype = NativePrototype;
+             NativePrototype.constructor = Constructor;

            }
 
            }
 

-           // TODO rather than special-case polygons, simply handle them separately.
-           // Ideally, coincident intersection points should be jittered to avoid
-           // clipping issues.
-           function lineEnd() {
-             if (segments) {
-               linePoint(x__, y__);
-               if (v__ && v_) { bufferStream.rejoin(); }
-               segments.push(bufferStream.result());
-             }
-             clipStream.point = point;
-             if (v_) { activeStream.lineEnd(); }
+           if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {
+             fixMethod('delete');
+             fixMethod('has');
+             IS_MAP && fixMethod('get');

            }
 
            }
 

-           function linePoint(x, y) {
-             var v = visible(x, y);
-             if (polygon) { ring.push([x, y]); }
-             if (first) {
-               x__ = x, y__ = y, v__ = v;
-               first = false;
-               if (v) {
-                 activeStream.lineStart();
-                 activeStream.point(x, y);
-               }
-             } else {
-               if (v && v_) { activeStream.point(x, y); }
-               else {
-                 var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
-                     b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];
-                 if (clipLine(a, b, x0, y0, x1, y1)) {
-                   if (!v_) {
-                     activeStream.lineStart();
-                     activeStream.point(a[0], a[1]);
-                   }
-                   activeStream.point(b[0], b[1]);
-                   if (!v) { activeStream.lineEnd(); }
-                   clean = false;
-                 } else if (v) {
-                   activeStream.lineStart();
-                   activeStream.point(x, y);
-                   clean = false;
-                 }
-               }
-             }
-             x_ = x, y_ = y, v_ = v;
-           }
+           if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);

 
 

-           return clipStream;
-         };
-       }
+           // weak collections should not contains .clear method
+           if (IS_WEAK && NativePrototype.clear) delete NativePrototype.clear;
+         }

 
 

-       var lengthSum = adder(),
-           lambda0$2,
-           sinPhi0$1,
-           cosPhi0$1;
+         exported[CONSTRUCTOR_NAME] = Constructor;
+         $$x({ global: true, forced: Constructor != NativeConstructor }, exported);

 
 

-       var lengthStream = {
-         sphere: noop$2,
-         point: noop$2,
-         lineStart: lengthLineStart,
-         lineEnd: noop$2,
-         polygonStart: noop$2,
-         polygonEnd: noop$2
-       };
+         setToStringTag(Constructor, CONSTRUCTOR_NAME);

 
 

-       function lengthLineStart() {
-         lengthStream.point = lengthPointFirst;
-         lengthStream.lineEnd = lengthLineEnd;
-       }
+         if (!IS_WEAK) common.setStrong(Constructor, CONSTRUCTOR_NAME, IS_MAP);

 
 

-       function lengthLineEnd() {
-         lengthStream.point = lengthStream.lineEnd = noop$2;
-       }
+         return Constructor;
+       };

 
 

-       function lengthPointFirst(lambda, phi) {
-         lambda *= radians, phi *= radians;
-         lambda0$2 = lambda, sinPhi0$1 = sin(phi), cosPhi0$1 = cos(phi);
-         lengthStream.point = lengthPoint;
-       }
+       var defineProperty$2 = objectDefineProperty.f;
+       var create$4 = objectCreate;
+       var redefineAll = redefineAll$4;
+       var bind$3 = functionBindContext;
+       var anInstance = anInstance$7;
+       var iterate = iterate$3;
+       var defineIterator = defineIterator$3;
+       var setSpecies$1 = setSpecies$5;
+       var DESCRIPTORS$5 = descriptors;
+       var fastKey = internalMetadata.exports.fastKey;
+       var InternalStateModule = internalState;

 
 

-       function lengthPoint(lambda, phi) {
-         lambda *= radians, phi *= radians;
-         var sinPhi = sin(phi),
-             cosPhi = cos(phi),
-             delta = abs$2(lambda - lambda0$2),
-             cosDelta = cos(delta),
-             sinDelta = sin(delta),
-             x = cosPhi * sinDelta,
-             y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,
-             z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;
-         lengthSum.add(atan2(sqrt(x * x + y * y), z));
-         lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
-       }
+       var setInternalState = InternalStateModule.set;
+       var internalStateGetterFor = InternalStateModule.getterFor;

 
 

-       function d3_geoLength(object) {
-         lengthSum.reset();
-         d3_geoStream(object, lengthStream);
-         return +lengthSum;
-       }
+       var collectionStrong$2 = {
+         getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {
+           var C = wrapper(function (that, iterable) {
+             anInstance(that, C, CONSTRUCTOR_NAME);
+             setInternalState(that, {
+               type: CONSTRUCTOR_NAME,
+               index: create$4(null),
+               first: undefined,
+               last: undefined,
+               size: 0
+             });
+             if (!DESCRIPTORS$5) that.size = 0;
+             if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
+           });

 
 

-       function identity(x) {
-         return x;
-       }
+           var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);

 
 

-       var areaSum$1 = adder(),
-           areaRingSum$1 = adder(),
-           x00,
-           y00,
-           x0$1,
-           y0$1;
+           var define = function (that, key, value) {
+             var state = getInternalState(that);
+             var entry = getEntry(that, key);
+             var previous, index;
+             // change existing entry
+             if (entry) {
+               entry.value = value;
+             // create new entry
+             } else {
+               state.last = entry = {
+                 index: index = fastKey(key, true),
+                 key: key,
+                 value: value,
+                 previous: previous = state.last,
+                 next: undefined,
+                 removed: false
+               };
+               if (!state.first) state.first = entry;
+               if (previous) previous.next = entry;
+               if (DESCRIPTORS$5) state.size++;
+               else that.size++;
+               // add to index
+               if (index !== 'F') state.index[index] = entry;
+             } return that;
+           };
+
+           var getEntry = function (that, key) {
+             var state = getInternalState(that);
+             // fast case
+             var index = fastKey(key);
+             var entry;
+             if (index !== 'F') return state.index[index];
+             // frozen object case
+             for (entry = state.first; entry; entry = entry.next) {
+               if (entry.key == key) return entry;
+             }
+           };

 
 

-       var areaStream$1 = {
-         point: noop$2,
-         lineStart: noop$2,
-         lineEnd: noop$2,
-         polygonStart: function() {
-           areaStream$1.lineStart = areaRingStart$1;
-           areaStream$1.lineEnd = areaRingEnd$1;
-         },
-         polygonEnd: function() {
-           areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop$2;
-           areaSum$1.add(abs$2(areaRingSum$1));
-           areaRingSum$1.reset();
+           redefineAll(C.prototype, {
+             // `{ Map, Set }.prototype.clear()` methods
+             // https://tc39.es/ecma262/#sec-map.prototype.clear
+             // https://tc39.es/ecma262/#sec-set.prototype.clear
+             clear: function clear() {
+               var that = this;
+               var state = getInternalState(that);
+               var data = state.index;
+               var entry = state.first;
+               while (entry) {
+                 entry.removed = true;
+                 if (entry.previous) entry.previous = entry.previous.next = undefined;
+                 delete data[entry.index];
+                 entry = entry.next;
+               }
+               state.first = state.last = undefined;
+               if (DESCRIPTORS$5) state.size = 0;
+               else that.size = 0;
+             },
+             // `{ Map, Set }.prototype.delete(key)` methods
+             // https://tc39.es/ecma262/#sec-map.prototype.delete
+             // https://tc39.es/ecma262/#sec-set.prototype.delete
+             'delete': function (key) {
+               var that = this;
+               var state = getInternalState(that);
+               var entry = getEntry(that, key);
+               if (entry) {
+                 var next = entry.next;
+                 var prev = entry.previous;
+                 delete state.index[entry.index];
+                 entry.removed = true;
+                 if (prev) prev.next = next;
+                 if (next) next.previous = prev;
+                 if (state.first == entry) state.first = next;
+                 if (state.last == entry) state.last = prev;
+                 if (DESCRIPTORS$5) state.size--;
+                 else that.size--;
+               } return !!entry;
+             },
+             // `{ Map, Set }.prototype.forEach(callbackfn, thisArg = undefined)` methods
+             // https://tc39.es/ecma262/#sec-map.prototype.foreach
+             // https://tc39.es/ecma262/#sec-set.prototype.foreach
+             forEach: function forEach(callbackfn /* , that = undefined */) {
+               var state = getInternalState(this);
+               var boundFunction = bind$3(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);
+               var entry;
+               while (entry = entry ? entry.next : state.first) {
+                 boundFunction(entry.value, entry.key, this);
+                 // revert to the last existing entry
+                 while (entry && entry.removed) entry = entry.previous;
+               }
+             },
+             // `{ Map, Set}.prototype.has(key)` methods
+             // https://tc39.es/ecma262/#sec-map.prototype.has
+             // https://tc39.es/ecma262/#sec-set.prototype.has
+             has: function has(key) {
+               return !!getEntry(this, key);
+             }
+           });
+
+           redefineAll(C.prototype, IS_MAP ? {
+             // `Map.prototype.get(key)` method
+             // https://tc39.es/ecma262/#sec-map.prototype.get
+             get: function get(key) {
+               var entry = getEntry(this, key);
+               return entry && entry.value;
+             },
+             // `Map.prototype.set(key, value)` method
+             // https://tc39.es/ecma262/#sec-map.prototype.set
+             set: function set(key, value) {
+               return define(this, key === 0 ? 0 : key, value);
+             }
+           } : {
+             // `Set.prototype.add(value)` method
+             // https://tc39.es/ecma262/#sec-set.prototype.add
+             add: function add(value) {
+               return define(this, value = value === 0 ? 0 : value, value);
+             }
+           });
+           if (DESCRIPTORS$5) defineProperty$2(C.prototype, 'size', {
+             get: function () {
+               return getInternalState(this).size;
+             }
+           });
+           return C;

          },
          },

-         result: function() {
-           var area = areaSum$1 / 2;
-           areaSum$1.reset();
-           return area;
+         setStrong: function (C, CONSTRUCTOR_NAME, IS_MAP) {
+           var ITERATOR_NAME = CONSTRUCTOR_NAME + ' Iterator';
+           var getInternalCollectionState = internalStateGetterFor(CONSTRUCTOR_NAME);
+           var getInternalIteratorState = internalStateGetterFor(ITERATOR_NAME);
+           // `{ Map, Set }.prototype.{ keys, values, entries, @@iterator }()` methods
+           // https://tc39.es/ecma262/#sec-map.prototype.entries
+           // https://tc39.es/ecma262/#sec-map.prototype.keys
+           // https://tc39.es/ecma262/#sec-map.prototype.values
+           // https://tc39.es/ecma262/#sec-map.prototype-@@iterator
+           // https://tc39.es/ecma262/#sec-set.prototype.entries
+           // https://tc39.es/ecma262/#sec-set.prototype.keys
+           // https://tc39.es/ecma262/#sec-set.prototype.values
+           // https://tc39.es/ecma262/#sec-set.prototype-@@iterator
+           defineIterator(C, CONSTRUCTOR_NAME, function (iterated, kind) {
+             setInternalState(this, {
+               type: ITERATOR_NAME,
+               target: iterated,
+               state: getInternalCollectionState(iterated),
+               kind: kind,
+               last: undefined
+             });
+           }, function () {
+             var state = getInternalIteratorState(this);
+             var kind = state.kind;
+             var entry = state.last;
+             // revert to the last existing entry
+             while (entry && entry.removed) entry = entry.previous;
+             // get next entry
+             if (!state.target || !(state.last = entry = entry ? entry.next : state.state.first)) {
+               // or finish the iteration
+               state.target = undefined;
+               return { value: undefined, done: true };
+             }
+             // return step by kind
+             if (kind == 'keys') return { value: entry.key, done: false };
+             if (kind == 'values') return { value: entry.value, done: false };
+             return { value: [entry.key, entry.value], done: false };
+           }, IS_MAP ? 'entries' : 'values', !IS_MAP, true);
+
+           // `{ Map, Set }.prototype[@@species]` accessors
+           // https://tc39.es/ecma262/#sec-get-map-@@species
+           // https://tc39.es/ecma262/#sec-get-set-@@species
+           setSpecies$1(CONSTRUCTOR_NAME);

          }
        };
 
          }
        };
 

-       function areaRingStart$1() {
-         areaStream$1.point = areaPointFirst$1;
-       }
+       var collection$1 = collection$2;
+       var collectionStrong$1 = collectionStrong$2;

 
 

-       function areaPointFirst$1(x, y) {
-         areaStream$1.point = areaPoint$1;
-         x00 = x0$1 = x, y00 = y0$1 = y;
-       }
+       // `Set` constructor
+       // https://tc39.es/ecma262/#sec-set-objects
+       collection$1('Set', function (init) {
+         return function Set() { return init(this, arguments.length ? arguments[0] : undefined); };
+       }, collectionStrong$1);

 
 

-       function areaPoint$1(x, y) {
-         areaRingSum$1.add(y0$1 * x - x0$1 * y);
-         x0$1 = x, y0$1 = y;
+       function d3_ascending (a, b) {
+         return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;

        }
 
        }
 

-       function areaRingEnd$1() {
-         areaPoint$1(x00, y00);
-       }
+       function d3_bisector (f) {
+         var delta = f;
+         var compare = f;

 
 

-       var x0$2 = Infinity,
-           y0$2 = x0$2,
-           x1 = -x0$2,
-           y1 = x1;
+         if (f.length === 1) {
+           delta = function delta(d, x) {
+             return f(d) - x;
+           };

 
 

-       var boundsStream$1 = {
-         point: boundsPoint$1,
-         lineStart: noop$2,
-         lineEnd: noop$2,
-         polygonStart: noop$2,
-         polygonEnd: noop$2,
-         result: function() {
-           var bounds = [[x0$2, y0$2], [x1, y1]];
-           x1 = y1 = -(y0$2 = x0$2 = Infinity);
-           return bounds;
+           compare = ascendingComparator(f);

          }
          }

-       };
-
-       function boundsPoint$1(x, y) {
-         if (x < x0$2) { x0$2 = x; }
-         if (x > x1) { x1 = x; }
-         if (y < y0$2) { y0$2 = y; }
-         if (y > y1) { y1 = y; }
-       }

 
 

-       // TODO Enforce positive area for exterior, negative area for interior?
+         function left(a, x, lo, hi) {
+           if (lo == null) lo = 0;
+           if (hi == null) hi = a.length;

 
 

-       var X0$1 = 0,
-           Y0$1 = 0,
-           Z0$1 = 0,
-           X1$1 = 0,
-           Y1$1 = 0,
-           Z1$1 = 0,
-           X2$1 = 0,
-           Y2$1 = 0,
-           Z2$1 = 0,
-           x00$1,
-           y00$1,
-           x0$3,
-           y0$3;
+           while (lo < hi) {
+             var mid = lo + hi >>> 1;
+             if (compare(a[mid], x) < 0) lo = mid + 1;else hi = mid;
+           }

 
 

-       var centroidStream$1 = {
-         point: centroidPoint$1,
-         lineStart: centroidLineStart$1,
-         lineEnd: centroidLineEnd$1,
-         polygonStart: function() {
-           centroidStream$1.lineStart = centroidRingStart$1;
-           centroidStream$1.lineEnd = centroidRingEnd$1;
-         },
-         polygonEnd: function() {
-           centroidStream$1.point = centroidPoint$1;
-           centroidStream$1.lineStart = centroidLineStart$1;
-           centroidStream$1.lineEnd = centroidLineEnd$1;
-         },
-         result: function() {
-           var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1]
-               : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1]
-               : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1]
-               : [NaN, NaN];
-           X0$1 = Y0$1 = Z0$1 =
-           X1$1 = Y1$1 = Z1$1 =
-           X2$1 = Y2$1 = Z2$1 = 0;
-           return centroid;
+           return lo;

          }
          }

-       };

 
 

-       function centroidPoint$1(x, y) {
-         X0$1 += x;
-         Y0$1 += y;
-         ++Z0$1;
-       }
+         function right(a, x, lo, hi) {
+           if (lo == null) lo = 0;
+           if (hi == null) hi = a.length;

 
 

-       function centroidLineStart$1() {
-         centroidStream$1.point = centroidPointFirstLine;
-       }
+           while (lo < hi) {
+             var mid = lo + hi >>> 1;
+             if (compare(a[mid], x) > 0) hi = mid;else lo = mid + 1;
+           }

 
 

-       function centroidPointFirstLine(x, y) {
-         centroidStream$1.point = centroidPointLine;
-         centroidPoint$1(x0$3 = x, y0$3 = y);
-       }
+           return lo;
+         }

 
 

-       function centroidPointLine(x, y) {
-         var dx = x - x0$3, dy = y - y0$3, z = sqrt(dx * dx + dy * dy);
-         X1$1 += z * (x0$3 + x) / 2;
-         Y1$1 += z * (y0$3 + y) / 2;
-         Z1$1 += z;
-         centroidPoint$1(x0$3 = x, y0$3 = y);
-       }
+         function center(a, x, lo, hi) {
+           if (lo == null) lo = 0;
+           if (hi == null) hi = a.length;
+           var i = left(a, x, lo, hi - 1);
+           return i > lo && delta(a[i - 1], x) > -delta(a[i], x) ? i - 1 : i;
+         }

 
 

-       function centroidLineEnd$1() {
-         centroidStream$1.point = centroidPoint$1;
+         return {
+           left: left,
+           center: center,
+           right: right
+         };

        }
 
        }
 

-       function centroidRingStart$1() {
-         centroidStream$1.point = centroidPointFirstRing;
+       function ascendingComparator(f) {
+         return function (d, x) {
+           return d3_ascending(f(d), x);
+         };

        }
 
        }
 

-       function centroidRingEnd$1() {
-         centroidPointRing(x00$1, y00$1);
-       }
+       var defineWellKnownSymbol = defineWellKnownSymbol$4;

 
 

-       function centroidPointFirstRing(x, y) {
-         centroidStream$1.point = centroidPointRing;
-         centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
-       }
+       // `Symbol.asyncIterator` well-known symbol
+       // https://tc39.es/ecma262/#sec-symbol.asynciterator
+       defineWellKnownSymbol('asyncIterator');

 
 

-       function centroidPointRing(x, y) {
-         var dx = x - x0$3,
-             dy = y - y0$3,
-             z = sqrt(dx * dx + dy * dy);
+       var runtime = {exports: {}};

 
 

-         X1$1 += z * (x0$3 + x) / 2;
-         Y1$1 += z * (y0$3 + y) / 2;
-         Z1$1 += z;
+       (function (module) {
+         var runtime = function (exports) {

 
 

-         z = y0$3 * x - x0$3 * y;
-         X2$1 += z * (x0$3 + x);
-         Y2$1 += z * (y0$3 + y);
-         Z2$1 += z * 3;
-         centroidPoint$1(x0$3 = x, y0$3 = y);
-       }
+           var Op = Object.prototype;
+           var hasOwn = Op.hasOwnProperty;
+           var undefined$1; // More compressible than void 0.

 
 

-       function PathContext(context) {
-         this._context = context;
-       }
+           var $Symbol = typeof Symbol === "function" ? Symbol : {};
+           var iteratorSymbol = $Symbol.iterator || "@@iterator";
+           var asyncIteratorSymbol = $Symbol.asyncIterator || "@@asyncIterator";
+           var toStringTagSymbol = $Symbol.toStringTag || "@@toStringTag";

 
 

-       PathContext.prototype = {
-         _radius: 4.5,
-         pointRadius: function(_) {
-           return this._radius = _, this;
-         },
-         polygonStart: function() {
-           this._line = 0;
-         },
-         polygonEnd: function() {
-           this._line = NaN;
-         },
-         lineStart: function() {
-           this._point = 0;
-         },
-         lineEnd: function() {
-           if (this._line === 0) { this._context.closePath(); }
-           this._point = NaN;
-         },
-         point: function(x, y) {
-           switch (this._point) {
-             case 0: {
-               this._context.moveTo(x, y);
-               this._point = 1;
-               break;
-             }
-             case 1: {
-               this._context.lineTo(x, y);
-               break;
-             }
-             default: {
-               this._context.moveTo(x + this._radius, y);
-               this._context.arc(x, y, this._radius, 0, tau);
-               break;
-             }
+           function define(obj, key, value) {
+             Object.defineProperty(obj, key, {
+               value: value,
+               enumerable: true,
+               configurable: true,
+               writable: true
+             });
+             return obj[key];

            }
            }

-         },
-         result: noop$2
-       };
-
-       var lengthSum$1 = adder(),
-           lengthRing,
-           x00$2,
-           y00$2,
-           x0$4,
-           y0$4;

 
 

-       var lengthStream$1 = {
-         point: noop$2,
-         lineStart: function() {
-           lengthStream$1.point = lengthPointFirst$1;
-         },
-         lineEnd: function() {
-           if (lengthRing) { lengthPoint$1(x00$2, y00$2); }
-           lengthStream$1.point = noop$2;
-         },
-         polygonStart: function() {
-           lengthRing = true;
-         },
-         polygonEnd: function() {
-           lengthRing = null;
-         },
-         result: function() {
-           var length = +lengthSum$1;
-           lengthSum$1.reset();
-           return length;
-         }
-       };
+           try {
+             // IE 8 has a broken Object.defineProperty that only works on DOM objects.
+             define({}, "");
+           } catch (err) {
+             define = function define(obj, key, value) {
+               return obj[key] = value;
+             };
+           }

 
 

-       function lengthPointFirst$1(x, y) {
-         lengthStream$1.point = lengthPoint$1;
-         x00$2 = x0$4 = x, y00$2 = y0$4 = y;
-       }
+           function wrap(innerFn, outerFn, self, tryLocsList) {
+             // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.
+             var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;
+             var generator = Object.create(protoGenerator.prototype);
+             var context = new Context(tryLocsList || []); // The ._invoke method unifies the implementations of the .next,
+             // .throw, and .return methods.

 
 

-       function lengthPoint$1(x, y) {
-         x0$4 -= x, y0$4 -= y;
-         lengthSum$1.add(sqrt(x0$4 * x0$4 + y0$4 * y0$4));
-         x0$4 = x, y0$4 = y;
-       }
+             generator._invoke = makeInvokeMethod(innerFn, self, context);
+             return generator;
+           }

 
 

-       function PathString() {
-         this._string = [];
-       }
+           exports.wrap = wrap; // Try/catch helper to minimize deoptimizations. Returns a completion
+           // record like context.tryEntries[i].completion. This interface could
+           // have been (and was previously) designed to take a closure to be
+           // invoked without arguments, but in all the cases we care about we
+           // already have an existing method we want to call, so there's no need
+           // to create a new function object. We can even get away with assuming
+           // the method takes exactly one argument, since that happens to be true
+           // in every case, so we don't have to touch the arguments object. The
+           // only additional allocation required is the completion record, which
+           // has a stable shape and so hopefully should be cheap to allocate.

 
 

-       PathString.prototype = {
-         _radius: 4.5,
-         _circle: circle(4.5),
-         pointRadius: function(_) {
-           if ((_ = +_) !== this._radius) { this._radius = _, this._circle = null; }
-           return this;
-         },
-         polygonStart: function() {
-           this._line = 0;
-         },
-         polygonEnd: function() {
-           this._line = NaN;
-         },
-         lineStart: function() {
-           this._point = 0;
-         },
-         lineEnd: function() {
-           if (this._line === 0) { this._string.push("Z"); }
-           this._point = NaN;
-         },
-         point: function(x, y) {
-           switch (this._point) {
-             case 0: {
-               this._string.push("M", x, ",", y);
-               this._point = 1;
-               break;
-             }
-             case 1: {
-               this._string.push("L", x, ",", y);
-               break;
-             }
-             default: {
-               if (this._circle == null) { this._circle = circle(this._radius); }
-               this._string.push("M", x, ",", y, this._circle);
-               break;
+           function tryCatch(fn, obj, arg) {
+             try {
+               return {
+                 type: "normal",
+                 arg: fn.call(obj, arg)
+               };
+             } catch (err) {
+               return {
+                 type: "throw",
+                 arg: err
+               };

              }
            }
              }
            }

-         },
-         result: function() {
-           if (this._string.length) {
-             var result = this._string.join("");
-             this._string = [];
-             return result;
-           } else {
-             return null;
-           }
-         }
-       };

 
 

-       function circle(radius) {
-         return "m0," + radius
-             + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius
-             + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius
-             + "z";
-       }
+           var GenStateSuspendedStart = "suspendedStart";
+           var GenStateSuspendedYield = "suspendedYield";
+           var GenStateExecuting = "executing";
+           var GenStateCompleted = "completed"; // Returning this object from the innerFn has the same effect as
+           // breaking out of the dispatch switch statement.

 
 

-       function d3_geoPath(projection, context) {
-         var pointRadius = 4.5,
-             projectionStream,
-             contextStream;
+           var ContinueSentinel = {}; // Dummy constructor functions that we use as the .constructor and
+           // .constructor.prototype properties for functions that return Generator
+           // objects. For full spec compliance, you may wish to configure your
+           // minifier not to mangle the names of these two functions.

 
 

-         function path(object) {
-           if (object) {
-             if (typeof pointRadius === "function") { contextStream.pointRadius(+pointRadius.apply(this, arguments)); }
-             d3_geoStream(object, projectionStream(contextStream));
-           }
-           return contextStream.result();
-         }
+           function Generator() {}

 
 

-         path.area = function(object) {
-           d3_geoStream(object, projectionStream(areaStream$1));
-           return areaStream$1.result();
-         };
+           function GeneratorFunction() {}

 
 

-         path.measure = function(object) {
-           d3_geoStream(object, projectionStream(lengthStream$1));
-           return lengthStream$1.result();
-         };
+           function GeneratorFunctionPrototype() {} // This is a polyfill for %IteratorPrototype% for environments that
+           // don't natively support it.

 
 

-         path.bounds = function(object) {
-           d3_geoStream(object, projectionStream(boundsStream$1));
-           return boundsStream$1.result();
-         };

 
 

-         path.centroid = function(object) {
-           d3_geoStream(object, projectionStream(centroidStream$1));
-           return centroidStream$1.result();
-         };
+           var IteratorPrototype = {};

 
 

-         path.projection = function(_) {
-           return arguments.length ? (projectionStream = _ == null ? (projection = null, identity) : (projection = _).stream, path) : projection;
-         };
+           IteratorPrototype[iteratorSymbol] = function () {
+             return this;
+           };

 
 

-         path.context = function(_) {
-           if (!arguments.length) { return context; }
-           contextStream = _ == null ? (context = null, new PathString) : new PathContext(context = _);
-           if (typeof pointRadius !== "function") { contextStream.pointRadius(pointRadius); }
-           return path;
-         };
+           var getProto = Object.getPrototypeOf;
+           var NativeIteratorPrototype = getProto && getProto(getProto(values([])));

 
 

-         path.pointRadius = function(_) {
-           if (!arguments.length) { return pointRadius; }
-           pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
-           return path;
-         };
+           if (NativeIteratorPrototype && NativeIteratorPrototype !== Op && hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {
+             // This environment has a native %IteratorPrototype%; use it instead
+             // of the polyfill.
+             IteratorPrototype = NativeIteratorPrototype;
+           }

 
 

-         return path.projection(projection).context(context);
-       }
+           var Gp = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(IteratorPrototype);
+           GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;
+           GeneratorFunctionPrototype.constructor = GeneratorFunction;
+           GeneratorFunction.displayName = define(GeneratorFunctionPrototype, toStringTagSymbol, "GeneratorFunction"); // Helper for defining the .next, .throw, and .return methods of the
+           // Iterator interface in terms of a single ._invoke method.

 
 

-       function d3_geoTransform(methods) {
-         return {
-           stream: transformer(methods)
-         };
-       }
+           function defineIteratorMethods(prototype) {
+             ["next", "throw", "return"].forEach(function (method) {
+               define(prototype, method, function (arg) {
+                 return this._invoke(method, arg);
+               });
+             });
+           }

 
 

-       function transformer(methods) {
-         return function(stream) {
-           var s = new TransformStream;
-           for (var key in methods) { s[key] = methods[key]; }
-           s.stream = stream;
-           return s;
-         };
-       }
+           exports.isGeneratorFunction = function (genFun) {
+             var ctor = typeof genFun === "function" && genFun.constructor;
+             return ctor ? ctor === GeneratorFunction || // For the native GeneratorFunction constructor, the best we can
+             // do is to check its .name property.
+             (ctor.displayName || ctor.name) === "GeneratorFunction" : false;
+           };

 
 

-       function TransformStream() {}
+           exports.mark = function (genFun) {
+             if (Object.setPrototypeOf) {
+               Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);
+             } else {
+               genFun.__proto__ = GeneratorFunctionPrototype;
+               define(genFun, toStringTagSymbol, "GeneratorFunction");
+             }

 
 

-       TransformStream.prototype = {
-         constructor: TransformStream,
-         point: function(x, y) { this.stream.point(x, y); },
-         sphere: function() { this.stream.sphere(); },
-         lineStart: function() { this.stream.lineStart(); },
-         lineEnd: function() { this.stream.lineEnd(); },
-         polygonStart: function() { this.stream.polygonStart(); },
-         polygonEnd: function() { this.stream.polygonEnd(); }
-       };
+             genFun.prototype = Object.create(Gp);
+             return genFun;
+           }; // Within the body of any async function, `await x` is transformed to
+           // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test
+           // `hasOwn.call(value, "__await")` to determine if the yielded value is
+           // meant to be awaited.

 
 

-       function fit(projection, fitBounds, object) {
-         var clip = projection.clipExtent && projection.clipExtent();
-         projection.scale(150).translate([0, 0]);
-         if (clip != null) { projection.clipExtent(null); }
-         d3_geoStream(object, projection.stream(boundsStream$1));
-         fitBounds(boundsStream$1.result());
-         if (clip != null) { projection.clipExtent(clip); }
-         return projection;
-       }

 
 

-       function fitExtent(projection, extent, object) {
-         return fit(projection, function(b) {
-           var w = extent[1][0] - extent[0][0],
-               h = extent[1][1] - extent[0][1],
-               k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
-               x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
-               y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
-           projection.scale(150 * k).translate([x, y]);
-         }, object);
-       }
+           exports.awrap = function (arg) {
+             return {
+               __await: arg
+             };
+           };

 
 

-       function fitSize(projection, size, object) {
-         return fitExtent(projection, [[0, 0], size], object);
-       }
+           function AsyncIterator(generator, PromiseImpl) {
+             function invoke(method, arg, resolve, reject) {
+               var record = tryCatch(generator[method], generator, arg);

 
 

-       function fitWidth(projection, width, object) {
-         return fit(projection, function(b) {
-           var w = +width,
-               k = w / (b[1][0] - b[0][0]),
-               x = (w - k * (b[1][0] + b[0][0])) / 2,
-               y = -k * b[0][1];
-           projection.scale(150 * k).translate([x, y]);
-         }, object);
-       }
+               if (record.type === "throw") {
+                 reject(record.arg);
+               } else {
+                 var result = record.arg;
+                 var value = result.value;
+
+                 if (value && _typeof(value) === "object" && hasOwn.call(value, "__await")) {
+                   return PromiseImpl.resolve(value.__await).then(function (value) {
+                     invoke("next", value, resolve, reject);
+                   }, function (err) {
+                     invoke("throw", err, resolve, reject);
+                   });
+                 }

 
 

-       function fitHeight(projection, height, object) {
-         return fit(projection, function(b) {
-           var h = +height,
-               k = h / (b[1][1] - b[0][1]),
-               x = -k * b[0][0],
-               y = (h - k * (b[1][1] + b[0][1])) / 2;
-           projection.scale(150 * k).translate([x, y]);
-         }, object);
-       }
+                 return PromiseImpl.resolve(value).then(function (unwrapped) {
+                   // When a yielded Promise is resolved, its final value becomes
+                   // the .value of the Promise<{value,done}> result for the
+                   // current iteration.
+                   result.value = unwrapped;
+                   resolve(result);
+                 }, function (error) {
+                   // If a rejected Promise was yielded, throw the rejection back
+                   // into the async generator function so it can be handled there.
+                   return invoke("throw", error, resolve, reject);
+                 });
+               }
+             }

 
 

-       var maxDepth = 16, // maximum depth of subdivision
-           cosMinDistance = cos(30 * radians); // cos(minimum angular distance)
+             var previousPromise;

 
 

-       function resample(project, delta2) {
-         return +delta2 ? resample$1(project, delta2) : resampleNone(project);
-       }
+             function enqueue(method, arg) {
+               function callInvokeWithMethodAndArg() {
+                 return new PromiseImpl(function (resolve, reject) {
+                   invoke(method, arg, resolve, reject);
+                 });
+               }

 
 

-       function resampleNone(project) {
-         return transformer({
-           point: function(x, y) {
-             x = project(x, y);
-             this.stream.point(x[0], x[1]);
-           }
-         });
-       }
+               return previousPromise = // If enqueue has been called before, then we want to wait until
+               // all previous Promises have been resolved before calling invoke,
+               // so that results are always delivered in the correct order. If
+               // enqueue has not been called before, then it is important to
+               // call invoke immediately, without waiting on a callback to fire,
+               // so that the async generator function has the opportunity to do
+               // any necessary setup in a predictable way. This predictability
+               // is why the Promise constructor synchronously invokes its
+               // executor callback, and why async functions synchronously
+               // execute code before the first await. Since we implement simple
+               // async functions in terms of async generators, it is especially
+               // important to get this right, even though it requires care.
+               previousPromise ? previousPromise.then(callInvokeWithMethodAndArg, // Avoid propagating failures to Promises returned by later
+               // invocations of the iterator.
+               callInvokeWithMethodAndArg) : callInvokeWithMethodAndArg();
+             } // Define the unified helper method that is used to implement .next,
+             // .throw, and .return (see defineIteratorMethods).

 
 

-       function resample$1(project, delta2) {

 
 

-         function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
-           var dx = x1 - x0,
-               dy = y1 - y0,
-               d2 = dx * dx + dy * dy;
-           if (d2 > 4 * delta2 && depth--) {
-             var a = a0 + a1,
-                 b = b0 + b1,
-                 c = c0 + c1,
-                 m = sqrt(a * a + b * b + c * c),
-                 phi2 = asin(c /= m),
-                 lambda2 = abs$2(abs$2(c) - 1) < epsilon || abs$2(lambda0 - lambda1) < epsilon ? (lambda0 + lambda1) / 2 : atan2(b, a),
-                 p = project(lambda2, phi2),
-                 x2 = p[0],
-                 y2 = p[1],
-                 dx2 = x2 - x0,
-                 dy2 = y2 - y0,
-                 dz = dy * dx2 - dx * dy2;
-             if (dz * dz / d2 > delta2 // perpendicular projected distance
-                 || abs$2((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
-                 || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) { // angular distance
-               resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
-               stream.point(x2, y2);
-               resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
-             }
+             this._invoke = enqueue;

            }
            }

-         }
-         return function(stream) {
-           var lambda00, x00, y00, a00, b00, c00, // first point
-               lambda0, x0, y0, a0, b0, c0; // previous point

 
 

-           var resampleStream = {
-             point: point,
-             lineStart: lineStart,
-             lineEnd: lineEnd,
-             polygonStart: function() { stream.polygonStart(); resampleStream.lineStart = ringStart; },
-             polygonEnd: function() { stream.polygonEnd(); resampleStream.lineStart = lineStart; }
+           defineIteratorMethods(AsyncIterator.prototype);
+
+           AsyncIterator.prototype[asyncIteratorSymbol] = function () {
+             return this;

            };
 
            };
 

-           function point(x, y) {
-             x = project(x, y);
-             stream.point(x[0], x[1]);
-           }
+           exports.AsyncIterator = AsyncIterator; // Note that simple async functions are implemented on top of
+           // AsyncIterator objects; they just return a Promise for the value of
+           // the final result produced by the iterator.

 
 

-           function lineStart() {
-             x0 = NaN;
-             resampleStream.point = linePoint;
-             stream.lineStart();
-           }
+           exports.async = function (innerFn, outerFn, self, tryLocsList, PromiseImpl) {
+             if (PromiseImpl === void 0) PromiseImpl = Promise;
+             var iter = new AsyncIterator(wrap(innerFn, outerFn, self, tryLocsList), PromiseImpl);
+             return exports.isGeneratorFunction(outerFn) ? iter // If outerFn is a generator, return the full iterator.
+             : iter.next().then(function (result) {
+               return result.done ? result.value : iter.next();
+             });
+           };

 
 

-           function linePoint(lambda, phi) {
-             var c = cartesian([lambda, phi]), p = project(lambda, phi);
-             resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
-             stream.point(x0, y0);
-           }
+           function makeInvokeMethod(innerFn, self, context) {
+             var state = GenStateSuspendedStart;
+             return function invoke(method, arg) {
+               if (state === GenStateExecuting) {
+                 throw new Error("Generator is already running");
+               }

 
 

-           function lineEnd() {
-             resampleStream.point = point;
-             stream.lineEnd();
-           }
+               if (state === GenStateCompleted) {
+                 if (method === "throw") {
+                   throw arg;
+                 } // Be forgiving, per 25.3.3.3.3 of the spec:
+                 // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume

 
 

-           function ringStart() {
-             lineStart();
-             resampleStream.point = ringPoint;
-             resampleStream.lineEnd = ringEnd;
-           }

 
 

-           function ringPoint(lambda, phi) {
-             linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
-             resampleStream.point = linePoint;
-           }
+                 return doneResult();
+               }

 
 

-           function ringEnd() {
-             resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
-             resampleStream.lineEnd = lineEnd;
-             lineEnd();
-           }
+               context.method = method;
+               context.arg = arg;

 
 

-           return resampleStream;
-         };
-       }
+               while (true) {
+                 var delegate = context.delegate;

 
 

-       var transformRadians = transformer({
-         point: function(x, y) {
-           this.stream.point(x * radians, y * radians);
-         }
-       });
+                 if (delegate) {
+                   var delegateResult = maybeInvokeDelegate(delegate, context);

 
 

-       function transformRotate(rotate) {
-         return transformer({
-           point: function(x, y) {
-             var r = rotate(x, y);
-             return this.stream.point(r[0], r[1]);
-           }
-         });
-       }
+                   if (delegateResult) {
+                     if (delegateResult === ContinueSentinel) continue;
+                     return delegateResult;
+                   }
+                 }

 
 

-       function scaleTranslate(k, dx, dy, sx, sy) {
-         function transform(x, y) {
-           x *= sx; y *= sy;
-           return [dx + k * x, dy - k * y];
-         }
-         transform.invert = function(x, y) {
-           return [(x - dx) / k * sx, (dy - y) / k * sy];
-         };
-         return transform;
-       }
+                 if (context.method === "next") {
+                   // Setting context._sent for legacy support of Babel's
+                   // function.sent implementation.
+                   context.sent = context._sent = context.arg;
+                 } else if (context.method === "throw") {
+                   if (state === GenStateSuspendedStart) {
+                     state = GenStateCompleted;
+                     throw context.arg;
+                   }

 
 

-       function scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {
-         var cosAlpha = cos(alpha),
-             sinAlpha = sin(alpha),
-             a = cosAlpha * k,
-             b = sinAlpha * k,
-             ai = cosAlpha / k,
-             bi = sinAlpha / k,
-             ci = (sinAlpha * dy - cosAlpha * dx) / k,
-             fi = (sinAlpha * dx + cosAlpha * dy) / k;
-         function transform(x, y) {
-           x *= sx; y *= sy;
-           return [a * x - b * y + dx, dy - b * x - a * y];
-         }
-         transform.invert = function(x, y) {
-           return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
-         };
-         return transform;
-       }
+                   context.dispatchException(context.arg);
+                 } else if (context.method === "return") {
+                   context.abrupt("return", context.arg);
+                 }

 
 

-       function projection(project) {
-         return projectionMutator(function() { return project; })();
-       }
+                 state = GenStateExecuting;
+                 var record = tryCatch(innerFn, self, context);

 
 

-       function projectionMutator(projectAt) {
-         var project,
-             k = 150, // scale
-             x = 480, y = 250, // translate
-             lambda = 0, phi = 0, // center
-             deltaLambda = 0, deltaPhi = 0, deltaGamma = 0, rotate, // pre-rotate
-             alpha = 0, // post-rotate angle
-             sx = 1, // reflectX
-             sy = 1, // reflectX
-             theta = null, preclip = clipAntimeridian, // pre-clip angle
-             x0 = null, y0, x1, y1, postclip = identity, // post-clip extent
-             delta2 = 0.5, // precision
-             projectResample,
-             projectTransform,
-             projectRotateTransform,
-             cache,
-             cacheStream;
+                 if (record.type === "normal") {
+                   // If an exception is thrown from innerFn, we leave state ===
+                   // GenStateExecuting and loop back for another invocation.
+                   state = context.done ? GenStateCompleted : GenStateSuspendedYield;

 
 

-         function projection(point) {
-           return projectRotateTransform(point[0] * radians, point[1] * radians);
-         }
+                   if (record.arg === ContinueSentinel) {
+                     continue;
+                   }

 
 

-         function invert(point) {
-           point = projectRotateTransform.invert(point[0], point[1]);
-           return point && [point[0] * degrees, point[1] * degrees];
-         }
+                   return {
+                     value: record.arg,
+                     done: context.done
+                   };
+                 } else if (record.type === "throw") {
+                   state = GenStateCompleted; // Dispatch the exception by looping back around to the
+                   // context.dispatchException(context.arg) call above.

 
 

-         projection.stream = function(stream) {
-           return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
-         };
+                   context.method = "throw";
+                   context.arg = record.arg;
+                 }
+               }
+             };
+           } // Call delegate.iterator[context.method](context.arg) and handle the
+           // result, either by returning a { value, done } result from the
+           // delegate iterator, or by modifying context.method and context.arg,
+           // setting context.delegate to null, and returning the ContinueSentinel.
+
+
+           function maybeInvokeDelegate(delegate, context) {
+             var method = delegate.iterator[context.method];
+
+             if (method === undefined$1) {
+               // A .throw or .return when the delegate iterator has no .throw
+               // method always terminates the yield* loop.
+               context.delegate = null;
+
+               if (context.method === "throw") {
+                 // Note: ["return"] must be used for ES3 parsing compatibility.
+                 if (delegate.iterator["return"]) {
+                   // If the delegate iterator has a return method, give it a
+                   // chance to clean up.
+                   context.method = "return";
+                   context.arg = undefined$1;
+                   maybeInvokeDelegate(delegate, context);
+
+                   if (context.method === "throw") {
+                     // If maybeInvokeDelegate(context) changed context.method from
+                     // "return" to "throw", let that override the TypeError below.
+                     return ContinueSentinel;
+                   }
+                 }

 
 

-         projection.preclip = function(_) {
-           return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
-         };
+                 context.method = "throw";
+                 context.arg = new TypeError("The iterator does not provide a 'throw' method");
+               }

 
 

-         projection.postclip = function(_) {
-           return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
-         };
+               return ContinueSentinel;
+             }

 
 

-         projection.clipAngle = function(_) {
-           return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees;
-         };
+             var record = tryCatch(method, delegate.iterator, context.arg);

 
 

-         projection.clipExtent = function(_) {
-           return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-         };
+             if (record.type === "throw") {
+               context.method = "throw";
+               context.arg = record.arg;
+               context.delegate = null;
+               return ContinueSentinel;
+             }

 
 

-         projection.scale = function(_) {
-           return arguments.length ? (k = +_, recenter()) : k;
-         };
+             var info = record.arg;

 
 

-         projection.translate = function(_) {
-           return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
-         };
+             if (!info) {
+               context.method = "throw";
+               context.arg = new TypeError("iterator result is not an object");
+               context.delegate = null;
+               return ContinueSentinel;
+             }

 
 

-         projection.center = function(_) {
-           return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees, phi * degrees];
-         };
+             if (info.done) {
+               // Assign the result of the finished delegate to the temporary
+               // variable specified by delegate.resultName (see delegateYield).
+               context[delegate.resultName] = info.value; // Resume execution at the desired location (see delegateYield).

 
 

-         projection.rotate = function(_) {
-           return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees, deltaPhi * degrees, deltaGamma * degrees];
-         };
+               context.next = delegate.nextLoc; // If context.method was "throw" but the delegate handled the
+               // exception, let the outer generator proceed normally. If
+               // context.method was "next", forget context.arg since it has been
+               // "consumed" by the delegate iterator. If context.method was
+               // "return", allow the original .return call to continue in the
+               // outer generator.

 
 

-         projection.angle = function(_) {
-           return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees;
-         };
+               if (context.method !== "return") {
+                 context.method = "next";
+                 context.arg = undefined$1;
+               }
+             } else {
+               // Re-yield the result returned by the delegate method.
+               return info;
+             } // The delegate iterator is finished, so forget it and continue with
+             // the outer generator.

 
 

-         projection.reflectX = function(_) {
-           return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
-         };

 
 

-         projection.reflectY = function(_) {
-           return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
-         };
+             context.delegate = null;
+             return ContinueSentinel;
+           } // Define Generator.prototype.{next,throw,return} in terms of the
+           // unified ._invoke helper method.

 
 

-         projection.precision = function(_) {
-           return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
-         };

 
 

-         projection.fitExtent = function(extent, object) {
-           return fitExtent(projection, extent, object);
-         };
+           defineIteratorMethods(Gp);
+           define(Gp, toStringTagSymbol, "Generator"); // A Generator should always return itself as the iterator object when the
+           // @@iterator function is called on it. Some browsers' implementations of the
+           // iterator prototype chain incorrectly implement this, causing the Generator
+           // object to not be returned from this call. This ensures that doesn't happen.
+           // See https://github.com/facebook/regenerator/issues/274 for more details.

 
 

-         projection.fitSize = function(size, object) {
-           return fitSize(projection, size, object);
-         };
+           Gp[iteratorSymbol] = function () {
+             return this;
+           };

 
 

-         projection.fitWidth = function(width, object) {
-           return fitWidth(projection, width, object);
-         };
+           Gp.toString = function () {
+             return "[object Generator]";
+           };

 
 

-         projection.fitHeight = function(height, object) {
-           return fitHeight(projection, height, object);
-         };
+           function pushTryEntry(locs) {
+             var entry = {
+               tryLoc: locs[0]
+             };

 
 

-         function recenter() {
-           var center = scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),
-               transform = (alpha ? scaleTranslateRotate : scaleTranslate)(k, x - center[0], y - center[1], sx, sy, alpha);
-           rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
-           projectTransform = compose(project, transform);
-           projectRotateTransform = compose(rotate, projectTransform);
-           projectResample = resample(projectTransform, delta2);
-           return reset();
-         }
+             if (1 in locs) {
+               entry.catchLoc = locs[1];
+             }

 
 

-         function reset() {
-           cache = cacheStream = null;
-           return projection;
-         }
+             if (2 in locs) {
+               entry.finallyLoc = locs[2];
+               entry.afterLoc = locs[3];
+             }

 
 

-         return function() {
-           project = projectAt.apply(this, arguments);
-           projection.invert = project.invert && invert;
-           return recenter();
-         };
-       }
+             this.tryEntries.push(entry);
+           }

 
 

-       function mercatorRaw(lambda, phi) {
-         return [lambda, log(tan((halfPi + phi) / 2))];
-       }
+           function resetTryEntry(entry) {
+             var record = entry.completion || {};
+             record.type = "normal";
+             delete record.arg;
+             entry.completion = record;
+           }

 
 

-       mercatorRaw.invert = function(x, y) {
-         return [x, 2 * atan(exp(y)) - halfPi];
-       };
+           function Context(tryLocsList) {
+             // The root entry object (effectively a try statement without a catch
+             // or a finally block) gives us a place to store values thrown from
+             // locations where there is no enclosing try statement.
+             this.tryEntries = [{
+               tryLoc: "root"
+             }];
+             tryLocsList.forEach(pushTryEntry, this);
+             this.reset(true);
+           }

 
 

-       function mercator() {
-         return mercatorProjection(mercatorRaw)
-             .scale(961 / tau);
-       }
+           exports.keys = function (object) {
+             var keys = [];

 
 

-       function mercatorProjection(project) {
-         var m = projection(project),
-             center = m.center,
-             scale = m.scale,
-             translate = m.translate,
-             clipExtent = m.clipExtent,
-             x0 = null, y0, x1, y1; // clip extent
+             for (var key in object) {
+               keys.push(key);
+             }

 
 

-         m.scale = function(_) {
-           return arguments.length ? (scale(_), reclip()) : scale();
-         };
+             keys.reverse(); // Rather than returning an object with a next method, we keep
+             // things simple and return the next function itself.

 
 

-         m.translate = function(_) {
-           return arguments.length ? (translate(_), reclip()) : translate();
-         };
+             return function next() {
+               while (keys.length) {
+                 var key = keys.pop();

 
 

-         m.center = function(_) {
-           return arguments.length ? (center(_), reclip()) : center();
-         };
+                 if (key in object) {
+                   next.value = key;
+                   next.done = false;
+                   return next;
+                 }
+               } // To avoid creating an additional object, we just hang the .value
+               // and .done properties off the next function object itself. This
+               // also ensures that the minifier will not anonymize the function.

 
 

-         m.clipExtent = function(_) {
-           return arguments.length ? ((_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1])), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-         };

 
 

-         function reclip() {
-           var k = pi * scale(),
-               t = m(rotation(m.rotate()).invert([0, 0]));
-           return clipExtent(x0 == null
-               ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw
-               ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]]
-               : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
-         }
+               next.done = true;
+               return next;
+             };
+           };

 
 

-         return reclip();
-       }
+           function values(iterable) {
+             if (iterable) {
+               var iteratorMethod = iterable[iteratorSymbol];

 
 

-       function d3_geoIdentity() {
-         var k = 1, tx = 0, ty = 0, sx = 1, sy = 1, // scale, translate and reflect
-             alpha = 0, ca, sa, // angle
-             x0 = null, y0, x1, y1, // clip extent
-             kx = 1, ky = 1,
-             transform = transformer({
-               point: function(x, y) {
-                 var p = projection([x, y]);
-                 this.stream.point(p[0], p[1]);
+               if (iteratorMethod) {
+                 return iteratorMethod.call(iterable);

                }
                }

-             }),
-             postclip = identity,
-             cache,
-             cacheStream;

 
 

-         function reset() {
-           kx = k * sx;
-           ky = k * sy;
-           cache = cacheStream = null;
-           return projection;
-         }
+               if (typeof iterable.next === "function") {
+                 return iterable;
+               }

 
 

-         function projection (p) {
-           var x = p[0] * kx, y = p[1] * ky;
-           if (alpha) {
-             var t = y * ca - x * sa;
-             x = x * ca + y * sa;
-             y = t;
-           }    
-           return [x + tx, y + ty];
-         }
-         projection.invert = function(p) {
-           var x = p[0] - tx, y = p[1] - ty;
-           if (alpha) {
-             var t = y * ca + x * sa;
-             x = x * ca - y * sa;
-             y = t;
-           }
-           return [x / kx, y / ky];
-         };
-         projection.stream = function(stream) {
-           return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
-         };
-         projection.postclip = function(_) {
-           return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
-         };
-         projection.clipExtent = function(_) {
-           return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
-         };
-         projection.scale = function(_) {
-           return arguments.length ? (k = +_, reset()) : k;
-         };
-         projection.translate = function(_) {
-           return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];
-         };
-         projection.angle = function(_) {
-           return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees;
-         };
-         projection.reflectX = function(_) {
-           return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;
-         };
-         projection.reflectY = function(_) {
-           return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
-         };
-         projection.fitExtent = function(extent, object) {
-           return fitExtent(projection, extent, object);
-         };
-         projection.fitSize = function(size, object) {
-           return fitSize(projection, size, object);
-         };
-         projection.fitWidth = function(width, object) {
-           return fitWidth(projection, width, object);
-         };
-         projection.fitHeight = function(height, object) {
-           return fitHeight(projection, height, object);
-         };
+               if (!isNaN(iterable.length)) {
+                 var i = -1,
+                     next = function next() {
+                   while (++i < iterable.length) {
+                     if (hasOwn.call(iterable, i)) {
+                       next.value = iterable[i];
+                       next.done = false;
+                       return next;
+                     }
+                   }

 
 

-         return projection;
-       }
+                   next.value = undefined$1;
+                   next.done = true;
+                   return next;
+                 };

 
 

-       // constants
-       var TAU = 2 * Math.PI;
-       var EQUATORIAL_RADIUS = 6356752.314245179;
-       var POLAR_RADIUS = 6378137.0;
+                 return next.next = next;
+               }
+             } // Return an iterator with no values.

 
 
 
 

-       function geoLatToMeters(dLat) {
-           return dLat * (TAU * POLAR_RADIUS / 360);
-       }
+             return {
+               next: doneResult
+             };
+           }

 
 

+           exports.values = values;

 
 

-       function geoLonToMeters(dLon, atLat) {
-           return Math.abs(atLat) >= 90 ? 0 :
-               dLon * (TAU * EQUATORIAL_RADIUS / 360) * Math.abs(Math.cos(atLat * (Math.PI / 180)));
-       }
+           function doneResult() {
+             return {
+               value: undefined$1,
+               done: true
+             };
+           }

 
 

+           Context.prototype = {
+             constructor: Context,
+             reset: function reset(skipTempReset) {
+               this.prev = 0;
+               this.next = 0; // Resetting context._sent for legacy support of Babel's
+               // function.sent implementation.

 
 

-       function geoMetersToLat(m) {
-           return m / (TAU * POLAR_RADIUS / 360);
-       }
+               this.sent = this._sent = undefined$1;
+               this.done = false;
+               this.delegate = null;
+               this.method = "next";
+               this.arg = undefined$1;
+               this.tryEntries.forEach(resetTryEntry);

 
 

+               if (!skipTempReset) {
+                 for (var name in this) {
+                   // Not sure about the optimal order of these conditions:
+                   if (name.charAt(0) === "t" && hasOwn.call(this, name) && !isNaN(+name.slice(1))) {
+                     this[name] = undefined$1;
+                   }
+                 }
+               }
+             },
+             stop: function stop() {
+               this.done = true;
+               var rootEntry = this.tryEntries[0];
+               var rootRecord = rootEntry.completion;

 
 

-       function geoMetersToLon(m, atLat) {
-           return Math.abs(atLat) >= 90 ? 0 :
-               m / (TAU * EQUATORIAL_RADIUS / 360) / Math.abs(Math.cos(atLat * (Math.PI / 180)));
-       }
+               if (rootRecord.type === "throw") {
+                 throw rootRecord.arg;
+               }

 
 

+               return this.rval;
+             },
+             dispatchException: function dispatchException(exception) {
+               if (this.done) {
+                 throw exception;
+               }

 
 

-       function geoMetersToOffset(meters, tileSize) {
-           tileSize = tileSize || 256;
-           return [
-               meters[0] * tileSize / (TAU * EQUATORIAL_RADIUS),
-               -meters[1] * tileSize / (TAU * POLAR_RADIUS)
-           ];
-       }
+               var context = this;

 
 

+               function handle(loc, caught) {
+                 record.type = "throw";
+                 record.arg = exception;
+                 context.next = loc;

 
 

-       function geoOffsetToMeters(offset, tileSize) {
-           tileSize = tileSize || 256;
-           return [
-               offset[0] * TAU * EQUATORIAL_RADIUS / tileSize,
-               -offset[1] * TAU * POLAR_RADIUS / tileSize
-           ];
-       }
+                 if (caught) {
+                   // If the dispatched exception was caught by a catch block,
+                   // then let that catch block handle the exception normally.
+                   context.method = "next";
+                   context.arg = undefined$1;
+                 }

 
 

+                 return !!caught;
+               }

 
 

-       // Equirectangular approximation of spherical distances on Earth
-       function geoSphericalDistance(a, b) {
-           var x = geoLonToMeters(a[0] - b[0], (a[1] + b[1]) / 2);
-           var y = geoLatToMeters(a[1] - b[1]);
-           return Math.sqrt((x * x) + (y * y));
-       }
+               for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+                 var entry = this.tryEntries[i];
+                 var record = entry.completion;

 
 

+                 if (entry.tryLoc === "root") {
+                   // Exception thrown outside of any try block that could handle
+                   // it, so set the completion value of the entire function to
+                   // throw the exception.
+                   return handle("end");
+                 }

 
 

-       // scale to zoom
-       function geoScaleToZoom(k, tileSize) {
-           tileSize = tileSize || 256;
-           var log2ts = Math.log(tileSize) * Math.LOG2E;
-           return Math.log(k * TAU) / Math.LN2 - log2ts;
-       }
+                 if (entry.tryLoc <= this.prev) {
+                   var hasCatch = hasOwn.call(entry, "catchLoc");
+                   var hasFinally = hasOwn.call(entry, "finallyLoc");

 
 

+                   if (hasCatch && hasFinally) {
+                     if (this.prev < entry.catchLoc) {
+                       return handle(entry.catchLoc, true);
+                     } else if (this.prev < entry.finallyLoc) {
+                       return handle(entry.finallyLoc);
+                     }
+                   } else if (hasCatch) {
+                     if (this.prev < entry.catchLoc) {
+                       return handle(entry.catchLoc, true);
+                     }
+                   } else if (hasFinally) {
+                     if (this.prev < entry.finallyLoc) {
+                       return handle(entry.finallyLoc);
+                     }
+                   } else {
+                     throw new Error("try statement without catch or finally");
+                   }
+                 }
+               }
+             },
+             abrupt: function abrupt(type, arg) {
+               for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+                 var entry = this.tryEntries[i];

 
 

-       // zoom to scale
-       function geoZoomToScale(z, tileSize) {
-           tileSize = tileSize || 256;
-           return tileSize * Math.pow(2, z) / TAU;
-       }
+                 if (entry.tryLoc <= this.prev && hasOwn.call(entry, "finallyLoc") && this.prev < entry.finallyLoc) {
+                   var finallyEntry = entry;
+                   break;
+                 }
+               }

 
 

+               if (finallyEntry && (type === "break" || type === "continue") && finallyEntry.tryLoc <= arg && arg <= finallyEntry.finallyLoc) {
+                 // Ignore the finally entry if control is not jumping to a
+                 // location outside the try/catch block.
+                 finallyEntry = null;
+               }

 
 

-       // returns info about the node from `nodes` closest to the given `point`
-       function geoSphericalClosestNode(nodes, point) {
-           var minDistance = Infinity, distance;
-           var indexOfMin;
+               var record = finallyEntry ? finallyEntry.completion : {};
+               record.type = type;
+               record.arg = arg;

 
 

-           for (var i in nodes) {
-               distance = geoSphericalDistance(nodes[i].loc, point);
-               if (distance < minDistance) {
-                   minDistance = distance;
-                   indexOfMin = i;
+               if (finallyEntry) {
+                 this.method = "next";
+                 this.next = finallyEntry.finallyLoc;
+                 return ContinueSentinel;

                }
                }

-           }

 
 

-           if (indexOfMin !== undefined) {
-               return { index: indexOfMin, distance: minDistance, node: nodes[indexOfMin] };
-           } else {
-               return null;
-           }
-       }
+               return this.complete(record);
+             },
+             complete: function complete(record, afterLoc) {
+               if (record.type === "throw") {
+                 throw record.arg;
+               }

 
 

-       function geoExtent(min, max) {
-           if (!(this instanceof geoExtent)) {
-               return new geoExtent(min, max);
-           } else if (min instanceof geoExtent) {
-               return min;
-           } else if (min && min.length === 2 && min[0].length === 2 && min[1].length === 2) {
-               this[0] = min[0];
-               this[1] = min[1];
-           } else {
-               this[0] = min        || [ Infinity,  Infinity];
-               this[1] = max || min || [-Infinity, -Infinity];
-           }
-       }
+               if (record.type === "break" || record.type === "continue") {
+                 this.next = record.arg;
+               } else if (record.type === "return") {
+                 this.rval = this.arg = record.arg;
+                 this.method = "return";
+                 this.next = "end";
+               } else if (record.type === "normal" && afterLoc) {
+                 this.next = afterLoc;
+               }

 
 

-       geoExtent.prototype = new Array(2);
+               return ContinueSentinel;
+             },
+             finish: function finish(finallyLoc) {
+               for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+                 var entry = this.tryEntries[i];
+
+                 if (entry.finallyLoc === finallyLoc) {
+                   this.complete(entry.completion, entry.afterLoc);
+                   resetTryEntry(entry);
+                   return ContinueSentinel;
+                 }
+               }
+             },
+             "catch": function _catch(tryLoc) {
+               for (var i = this.tryEntries.length - 1; i >= 0; --i) {
+                 var entry = this.tryEntries[i];

 
 

-       Object.assign(geoExtent.prototype, {
+                 if (entry.tryLoc === tryLoc) {
+                   var record = entry.completion;

 
 

-           equals: function (obj) {
-               return this[0][0] === obj[0][0] &&
-                   this[0][1] === obj[0][1] &&
-                   this[1][0] === obj[1][0] &&
-                   this[1][1] === obj[1][1];
-           },
+                   if (record.type === "throw") {
+                     var thrown = record.arg;
+                     resetTryEntry(entry);
+                   }

 
 

+                   return thrown;
+                 }
+               } // The context.catch method must only be called with a location
+               // argument that corresponds to a known catch block.

 
 

-           extend: function(obj) {
-               if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-               return geoExtent(
-                   [Math.min(obj[0][0], this[0][0]), Math.min(obj[0][1], this[0][1])],
-                   [Math.max(obj[1][0], this[1][0]), Math.max(obj[1][1], this[1][1])]
-               );
-           },

 
 

+               throw new Error("illegal catch attempt");
+             },
+             delegateYield: function delegateYield(iterable, resultName, nextLoc) {
+               this.delegate = {
+                 iterator: values(iterable),
+                 resultName: resultName,
+                 nextLoc: nextLoc
+               };

 
 

-           _extend: function(extent) {
-               this[0][0] = Math.min(extent[0][0], this[0][0]);
-               this[0][1] = Math.min(extent[0][1], this[0][1]);
-               this[1][0] = Math.max(extent[1][0], this[1][0]);
-               this[1][1] = Math.max(extent[1][1], this[1][1]);
-           },
+               if (this.method === "next") {
+                 // Deliberately forget the last sent value so that we don't
+                 // accidentally pass it on to the delegate.
+                 this.arg = undefined$1;
+               }

 
 

+               return ContinueSentinel;
+             }
+           }; // Regardless of whether this script is executing as a CommonJS module
+           // or not, return the runtime object so that we can declare the variable
+           // regeneratorRuntime in the outer scope, which allows this module to be
+           // injected easily by `bin/regenerator --include-runtime script.js`.
+
+           return exports;
+         }( // If this script is executing as a CommonJS module, use module.exports
+         // as the regeneratorRuntime namespace. Otherwise create a new empty
+         // object. Either way, the resulting object will be used to initialize
+         // the regeneratorRuntime variable at the top of this file.
+         module.exports );

 
 

-           area: function() {
-               return Math.abs((this[1][0] - this[0][0]) * (this[1][1] - this[0][1]));
-           },
+         try {
+           regeneratorRuntime = runtime;
+         } catch (accidentalStrictMode) {
+           // This module should not be running in strict mode, so the above
+           // assignment should always work unless something is misconfigured. Just
+           // in case runtime.js accidentally runs in strict mode, we can escape
+           // strict mode using a global Function call. This could conceivably fail
+           // if a Content Security Policy forbids using Function, but in that case
+           // the proper solution is to fix the accidental strict mode problem. If
+           // you've misconfigured your bundler to force strict mode and applied a
+           // CSP to forbid Function, and you're not willing to fix either of those
+           // problems, please detail your unique predicament in a GitHub issue.
+           Function("r", "regeneratorRuntime = r")(runtime);
+         }
+       })(runtime);
+
+       var _marked$3 = /*#__PURE__*/regeneratorRuntime.mark(numbers);
+
+       function number$1 (x) {
+         return x === null ? NaN : +x;
+       }
+       function numbers(values, valueof) {
+         var _iterator, _step, value, index, _iterator2, _step2, _value;

 
 

+         return regeneratorRuntime.wrap(function numbers$(_context) {
+           while (1) {
+             switch (_context.prev = _context.next) {
+               case 0:
+                 if (!(valueof === undefined)) {
+                   _context.next = 21;
+                   break;
+                 }

 
 

-           center: function() {
-               return [(this[0][0] + this[1][0]) / 2, (this[0][1] + this[1][1]) / 2];
-           },
+                 _iterator = _createForOfIteratorHelper(values);
+                 _context.prev = 2;

 
 

+                 _iterator.s();

 
 

-           rectangle: function() {
-               return [this[0][0], this[0][1], this[1][0], this[1][1]];
-           },
+               case 4:
+                 if ((_step = _iterator.n()).done) {
+                   _context.next = 11;
+                   break;
+                 }

 
 

+                 value = _step.value;

 
 

-           bbox: function() {
-               return { minX: this[0][0], minY: this[0][1], maxX: this[1][0], maxY: this[1][1] };
-           },
+                 if (!(value != null && (value = +value) >= value)) {
+                   _context.next = 9;
+                   break;
+                 }

 
 

+                 _context.next = 9;
+                 return value;

 
 

-           polygon: function() {
-               return [
-                   [this[0][0], this[0][1]],
-                   [this[0][0], this[1][1]],
-                   [this[1][0], this[1][1]],
-                   [this[1][0], this[0][1]],
-                   [this[0][0], this[0][1]]
-               ];
-           },
+               case 9:
+                 _context.next = 4;
+                 break;

 
 

+               case 11:
+                 _context.next = 16;
+                 break;

 
 

-           contains: function(obj) {
-               if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-               return obj[0][0] >= this[0][0] &&
-                      obj[0][1] >= this[0][1] &&
-                      obj[1][0] <= this[1][0] &&
-                      obj[1][1] <= this[1][1];
-           },
+               case 13:
+                 _context.prev = 13;
+                 _context.t0 = _context["catch"](2);

 
 

+                 _iterator.e(_context.t0);

 
 

-           intersects: function(obj) {
-               if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-               return obj[0][0] <= this[1][0] &&
-                      obj[0][1] <= this[1][1] &&
-                      obj[1][0] >= this[0][0] &&
-                      obj[1][1] >= this[0][1];
-           },
+               case 16:
+                 _context.prev = 16;

 
 

+                 _iterator.f();

 
 

-           intersection: function(obj) {
-               if (!this.intersects(obj)) { return new geoExtent(); }
-               return new geoExtent(
-                   [Math.max(obj[0][0], this[0][0]), Math.max(obj[0][1], this[0][1])],
-                   [Math.min(obj[1][0], this[1][0]), Math.min(obj[1][1], this[1][1])]
-               );
-           },
+                 return _context.finish(16);

 
 

+               case 19:
+                 _context.next = 40;
+                 break;

 
 

-           percentContainedIn: function(obj) {
-               if (!(obj instanceof geoExtent)) { obj = new geoExtent(obj); }
-               var a1 = this.intersection(obj).area();
-               var a2 = this.area();
+               case 21:
+                 index = -1;
+                 _iterator2 = _createForOfIteratorHelper(values);
+                 _context.prev = 23;

 
 

-               if (a1 === Infinity || a2 === Infinity) {
-                   return 0;
-               } else if (a1 === 0 || a2 === 0) {
-                   if (obj.contains(this)) {
-                       return 1;
-                   }
-                   return 0;
-               } else {
-                   return a1 / a2;
-               }
-           },
+                 _iterator2.s();

 
 

+               case 25:
+                 if ((_step2 = _iterator2.n()).done) {
+                   _context.next = 32;
+                   break;
+                 }

 
 

-           padByMeters: function(meters) {
-               var dLat = geoMetersToLat(meters);
-               var dLon = geoMetersToLon(meters, this.center()[1]);
-               return geoExtent(
-                   [this[0][0] - dLon, this[0][1] - dLat],
-                   [this[1][0] + dLon, this[1][1] + dLat]
-               );
-           },
+                 _value = _step2.value;

 
 

+                 if (!((_value = valueof(_value, ++index, values)) != null && (_value = +_value) >= _value)) {
+                   _context.next = 30;
+                   break;
+                 }

 
 

-           toParam: function() {
-               return this.rectangle().join(',');
-           }
+                 _context.next = 30;
+                 return _value;

 
 

-       });
+               case 30:
+                 _context.next = 25;
+                 break;

 
 

-       function d3_polygonArea(polygon) {
-         var i = -1,
-             n = polygon.length,
-             a,
-             b = polygon[n - 1],
-             area = 0;
+               case 32:
+                 _context.next = 37;
+                 break;

 
 

-         while (++i < n) {
-           a = b;
-           b = polygon[i];
-           area += a[1] * b[0] - a[0] * b[1];
-         }
+               case 34:
+                 _context.prev = 34;
+                 _context.t1 = _context["catch"](23);

 
 

-         return area / 2;
-       }
+                 _iterator2.e(_context.t1);

 
 

-       function d3_polygonCentroid(polygon) {
-         var i = -1,
-             n = polygon.length,
-             x = 0,
-             y = 0,
-             a,
-             b = polygon[n - 1],
-             c,
-             k = 0;
+               case 37:
+                 _context.prev = 37;

 
 

-         while (++i < n) {
-           a = b;
-           b = polygon[i];
-           k += c = a[0] * b[1] - b[0] * a[1];
-           x += (a[0] + b[0]) * c;
-           y += (a[1] + b[1]) * c;
-         }
+                 _iterator2.f();

 
 

-         return k *= 3, [x / k, y / k];
-       }
+                 return _context.finish(37);

 
 

-       // Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
-       // the 3D cross product in a quadrant I Cartesian coordinate system (+x is
-       // right, +y is up). Returns a positive value if ABC is counter-clockwise,
-       // negative if clockwise, and zero if the points are collinear.
-       function cross(a, b, c) {
-         return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
+               case 40:
+               case "end":
+                 return _context.stop();
+             }
+           }
+         }, _marked$3, null, [[2, 13, 16, 19], [23, 34, 37, 40]]);

        }
 
        }
 

-       function lexicographicOrder(a, b) {
-         return a[0] - b[0] || a[1] - b[1];
-       }
+       var ascendingBisect = d3_bisector(d3_ascending);
+       var bisectRight = ascendingBisect.right;
+       d3_bisector(number$1).center;

 
 

-       // Computes the upper convex hull per the monotone chain algorithm.
-       // Assumes points.length >= 3, is sorted by x, unique in y.
-       // Returns an array of indices into points in left-to-right order.
-       function computeUpperHullIndexes(points) {
-         var n = points.length,
-             indexes = [0, 1],
-             size = 2;
+       var $$w = _export;
+       var from = arrayFrom$1;
+       var checkCorrectnessOfIteration = checkCorrectnessOfIteration$4;

 
 

-         for (var i = 2; i < n; ++i) {
-           while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) { --size; }
-           indexes[size++] = i;
-         }
+       var INCORRECT_ITERATION = !checkCorrectnessOfIteration(function (iterable) {
+         // eslint-disable-next-line es/no-array-from -- required for testing
+         Array.from(iterable);
+       });

 
 

-         return indexes.slice(0, size); // remove popped points
-       }
+       // `Array.from` method
+       // https://tc39.es/ecma262/#sec-array.from
+       $$w({ target: 'Array', stat: true, forced: INCORRECT_ITERATION }, {
+         from: from
+       });

 
 

-       function d3_polygonHull(points) {
-         if ((n = points.length) < 3) { return null; }
+       var $$v = _export;
+       var fill = arrayFill$1;
+       var addToUnscopables$3 = addToUnscopables$5;

 
 

-         var i,
-             n,
-             sortedPoints = new Array(n),
-             flippedPoints = new Array(n);
+       // `Array.prototype.fill` method
+       // https://tc39.es/ecma262/#sec-array.prototype.fill
+       $$v({ target: 'Array', proto: true }, {
+         fill: fill
+       });

 
 

-         for (i = 0; i < n; ++i) { sortedPoints[i] = [+points[i][0], +points[i][1], i]; }
-         sortedPoints.sort(lexicographicOrder);
-         for (i = 0; i < n; ++i) { flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]]; }
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables$3('fill');

 
 

-         var upperIndexes = computeUpperHullIndexes(sortedPoints),
-             lowerIndexes = computeUpperHullIndexes(flippedPoints);
+       var $$u = _export;
+       var $some = arrayIteration.some;
+       var arrayMethodIsStrict$3 = arrayMethodIsStrict$8;

 
 

-         // Construct the hull polygon, removing possible duplicate endpoints.
-         var skipLeft = lowerIndexes[0] === upperIndexes[0],
-             skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
-             hull = [];
+       var STRICT_METHOD$3 = arrayMethodIsStrict$3('some');

 
 

-         // Add upper hull in right-to-l order.
-         // Then add lower hull in left-to-right order.
-         for (i = upperIndexes.length - 1; i >= 0; --i) { hull.push(points[sortedPoints[upperIndexes[i]][2]]); }
-         for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) { hull.push(points[sortedPoints[lowerIndexes[i]][2]]); }
+       // `Array.prototype.some` method
+       // https://tc39.es/ecma262/#sec-array.prototype.some
+       $$u({ target: 'Array', proto: true, forced: !STRICT_METHOD$3 }, {
+         some: function some(callbackfn /* , thisArg */) {
+           return $some(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });

 
 

-         return hull;
-       }
+       var TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS = typedArrayConstructorsRequireWrappers;
+       var exportTypedArrayStaticMethod = arrayBufferViewCore.exportTypedArrayStaticMethod;
+       var typedArrayFrom = typedArrayFrom$2;

 
 

-       // vector equals
-       function geoVecEqual(a, b, epsilon) {
-           if (epsilon) {
-               return (Math.abs(a[0] - b[0]) <= epsilon) && (Math.abs(a[1] - b[1]) <= epsilon);
-           } else {
-               return (a[0] === b[0]) && (a[1] === b[1]);
-           }
-       }
+       // `%TypedArray%.from` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.from
+       exportTypedArrayStaticMethod('from', typedArrayFrom, TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS);

 
 

-       // vector addition
-       function geoVecAdd(a, b) {
-           return [ a[0] + b[0], a[1] + b[1] ];
-       }
+       var createTypedArrayConstructor = typedArrayConstructor.exports;

 
 

-       // vector subtraction
-       function geoVecSubtract(a, b) {
-           return [ a[0] - b[0], a[1] - b[1] ];
-       }
+       // `Float64Array` constructor
+       // https://tc39.es/ecma262/#sec-typedarray-objects
+       createTypedArrayConstructor('Float64', function (init) {
+         return function Float64Array(data, byteOffset, length) {
+           return init(this, data, byteOffset, length);
+         };
+       });

 
 

-       // vector scaling
-       function geoVecScale(a, mag) {
-           return [ a[0] * mag, a[1] * mag ];
+       function d3_descending (a, b) {
+         return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;

        }
 
        }
 

-       // vector rounding (was: geoRoundCoordinates)
-       function geoVecFloor(a) {
-           return [ Math.floor(a[0]), Math.floor(a[1]) ];
-       }
+       // https://github.com/python/cpython/blob/a74eea238f5baba15797e2e8b570d153bc8690a7/Modules/mathmodule.c#L1423
+       var Adder = /*#__PURE__*/function () {
+         function Adder() {
+           _classCallCheck$1(this, Adder);

 
 

-       // linear interpolation
-       function geoVecInterp(a, b, t) {
-           return [
-               a[0] + (b[0] - a[0]) * t,
-               a[1] + (b[1] - a[1]) * t
-           ];
-       }
+           this._partials = new Float64Array(32);
+           this._n = 0;
+         }

 
 

-       // http://jsperf.com/id-dist-optimization
-       function geoVecLength(a, b) {
-           return Math.sqrt(geoVecLengthSquare(a,b));
-       }
+         _createClass$1(Adder, [{
+           key: "add",
+           value: function add(x) {
+             var p = this._partials;
+             var i = 0;

 
 

-       // length of vector raised to the power two
-       function geoVecLengthSquare(a, b) {
-           b = b || [0, 0];
-           var x = a[0] - b[0];
-           var y = a[1] - b[1];
-           return (x * x) + (y * y);
-       }
+             for (var j = 0; j < this._n && j < 32; j++) {
+               var y = p[j],
+                   hi = x + y,
+                   lo = Math.abs(x) < Math.abs(y) ? x - (hi - y) : y - (hi - x);
+               if (lo) p[i++] = lo;
+               x = hi;
+             }

 
 

-       // get a unit vector
-       function geoVecNormalize(a) {
-           var length = Math.sqrt((a[0] * a[0]) + (a[1] * a[1]));
-           if (length !== 0) {
-               return geoVecScale(a, 1 / length);
+             p[i] = x;
+             this._n = i + 1;
+             return this;

            }
            }

-           return [0, 0];
-       }
+         }, {
+           key: "valueOf",
+           value: function valueOf() {
+             var p = this._partials;
+             var n = this._n,
+                 x,
+                 y,
+                 lo,
+                 hi = 0;
+
+             if (n > 0) {
+               hi = p[--n];
+
+               while (n > 0) {
+                 x = hi;
+                 y = p[--n];
+                 hi = x + y;
+                 lo = y - (hi - x);
+                 if (lo) break;
+               }
+
+               if (n > 0 && (lo < 0 && p[n - 1] < 0 || lo > 0 && p[n - 1] > 0)) {
+                 y = lo * 2;
+                 x = hi + y;
+                 if (y == x - hi) hi = x;
+               }
+             }

 
 

-       // Return the counterclockwise angle in the range (-pi, pi)
-       // between the positive X axis and the line intersecting a and b.
-       function geoVecAngle(a, b) {
-           return Math.atan2(b[1] - a[1], b[0] - a[0]);
-       }
+             return hi;
+           }
+         }]);

 
 

-       // dot product
-       function geoVecDot(a, b, origin) {
-           origin = origin || [0, 0];
-           var p = geoVecSubtract(a, origin);
-           var q = geoVecSubtract(b, origin);
-           return (p[0]) * (q[0]) + (p[1]) * (q[1]);
-       }
+         return Adder;
+       }();

 
 

-       // normalized dot product
-       function geoVecNormalizedDot(a, b, origin) {
-           origin = origin || [0, 0];
-           var p = geoVecNormalize(geoVecSubtract(a, origin));
-           var q = geoVecNormalize(geoVecSubtract(b, origin));
-           return geoVecDot(p, q);
-       }
+       var $$t = _export;
+       var DESCRIPTORS$4 = descriptors;
+       var defineProperties = objectDefineProperties;

 
 

-       // 2D cross product of OA and OB vectors, returns magnitude of Z vector
-       // Returns a positive value, if OAB makes a counter-clockwise turn,
-       // negative for clockwise turn, and zero if the points are collinear.
-       function geoVecCross(a, b, origin) {
-           origin = origin || [0, 0];
-           var p = geoVecSubtract(a, origin);
-           var q = geoVecSubtract(b, origin);
-           return (p[0]) * (q[1]) - (p[1]) * (q[0]);
-       }
+       // `Object.defineProperties` method
+       // https://tc39.es/ecma262/#sec-object.defineproperties
+       $$t({ target: 'Object', stat: true, forced: !DESCRIPTORS$4, sham: !DESCRIPTORS$4 }, {
+         defineProperties: defineProperties
+       });

 
 

+       var collection = collection$2;
+       var collectionStrong = collectionStrong$2;
+
+       // `Map` constructor
+       // https://tc39.es/ecma262/#sec-map-objects
+       collection('Map', function (init) {
+         return function Map() { return init(this, arguments.length ? arguments[0] : undefined); };
+       }, collectionStrong);
+
+       var $$s = _export;
+       var aFunction = aFunction$9;
+       var toObject$1 = toObject$i;
+       var toLength$4 = toLength$q;
+       var fails$b = fails$N;
+       var internalSort = arraySort;
+       var arrayMethodIsStrict$2 = arrayMethodIsStrict$8;
+       var FF = engineFfVersion;
+       var IE_OR_EDGE = engineIsIeOrEdge;
+       var V8 = engineV8Version;
+       var WEBKIT = engineWebkitVersion;
+
+       var test = [];
+       var nativeSort = test.sort;
+
+       // IE8-
+       var FAILS_ON_UNDEFINED = fails$b(function () {
+         test.sort(undefined);
+       });
+       // V8 bug
+       var FAILS_ON_NULL = fails$b(function () {
+         test.sort(null);
+       });
+       // Old WebKit
+       var STRICT_METHOD$2 = arrayMethodIsStrict$2('sort');

 
 

-       // find closest orthogonal projection of point onto points array
-       function geoVecProject(a, points) {
-           var min = Infinity;
-           var idx;
-           var target;
-
-           for (var i = 0; i < points.length - 1; i++) {
-               var o = points[i];
-               var s = geoVecSubtract(points[i + 1], o);
-               var v = geoVecSubtract(a, o);
-               var proj = geoVecDot(v, s) / geoVecDot(s, s);
-               var p;
-
-               if (proj < 0) {
-                   p = o;
-               } else if (proj > 1) {
-                   p = points[i + 1];
-               } else {
-                   p = [o[0] + proj * s[0], o[1] + proj * s[1]];
-               }
+       var STABLE_SORT = !fails$b(function () {
+         // feature detection can be too slow, so check engines versions
+         if (V8) return V8 < 70;
+         if (FF && FF > 3) return;
+         if (IE_OR_EDGE) return true;
+         if (WEBKIT) return WEBKIT < 603;

 
 

-               var dist = geoVecLength(p, a);
-               if (dist < min) {
-                   min = dist;
-                   idx = i + 1;
-                   target = p;
-               }
+         var result = '';
+         var code, chr, value, index;
+
+         // generate an array with more 512 elements (Chakra and old V8 fails only in this case)
+         for (code = 65; code < 76; code++) {
+           chr = String.fromCharCode(code);
+
+           switch (code) {
+             case 66: case 69: case 70: case 72: value = 3; break;
+             case 68: case 71: value = 4; break;
+             default: value = 2;

            }
 
            }
 

-           if (idx !== undefined) {
-               return { index: idx, distance: min, target: target };
-           } else {
-               return null;
+           for (index = 0; index < 47; index++) {
+             test.push({ k: chr + index, v: value });

            }
            }

-       }
+         }

 
 

-       // Return the counterclockwise angle in the range (-pi, pi)
-       // between the positive X axis and the line intersecting a and b.
-       function geoAngle(a, b, projection) {
-           return geoVecAngle(projection(a.loc), projection(b.loc));
-       }
+         test.sort(function (a, b) { return b.v - a.v; });

 
 

+         for (index = 0; index < test.length; index++) {
+           chr = test[index].k.charAt(0);
+           if (result.charAt(result.length - 1) !== chr) result += chr;
+         }

 
 

-       function geoEdgeEqual(a, b) {
-           return (a[0] === b[0] && a[1] === b[1]) ||
-               (a[0] === b[1] && a[1] === b[0]);
-       }
+         return result !== 'DGBEFHACIJK';
+       });

 
 

+       var FORCED$5 = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD$2 || !STABLE_SORT;

 
 

-       // Rotate all points counterclockwise around a pivot point by given angle
-       function geoRotate(points, angle, around) {
-           return points.map(function(point) {
-               var radial = geoVecSubtract(point, around);
-               return [
-                   radial[0] * Math.cos(angle) - radial[1] * Math.sin(angle) + around[0],
-                   radial[0] * Math.sin(angle) + radial[1] * Math.cos(angle) + around[1]
-               ];
-           });
-       }
+       var getSortCompare = function (comparefn) {
+         return function (x, y) {
+           if (y === undefined) return -1;
+           if (x === undefined) return 1;
+           if (comparefn !== undefined) return +comparefn(x, y) || 0;
+           return String(x) > String(y) ? 1 : -1;
+         };
+       };

 
 

+       // `Array.prototype.sort` method
+       // https://tc39.es/ecma262/#sec-array.prototype.sort
+       $$s({ target: 'Array', proto: true, forced: FORCED$5 }, {
+         sort: function sort(comparefn) {
+           if (comparefn !== undefined) aFunction(comparefn);

 
 

-       // Choose the edge with the minimal distance from `point` to its orthogonal
-       // projection onto that edge, if such a projection exists, or the distance to
-       // the closest vertex on that edge. Returns an object with the `index` of the
-       // chosen edge, the chosen `loc` on that edge, and the `distance` to to it.
-       function geoChooseEdge(nodes, point, projection, activeID) {
-           var dist = geoVecLength;
-           var points = nodes.map(function(n) { return projection(n.loc); });
-           var ids = nodes.map(function(n) { return n.id; });
-           var min = Infinity;
-           var idx;
-           var loc;
-
-           for (var i = 0; i < points.length - 1; i++) {
-               if (ids[i] === activeID || ids[i + 1] === activeID) { continue; }
-
-               var o = points[i];
-               var s = geoVecSubtract(points[i + 1], o);
-               var v = geoVecSubtract(point, o);
-               var proj = geoVecDot(v, s) / geoVecDot(s, s);
-               var p;
-
-               if (proj < 0) {
-                   p = o;
-               } else if (proj > 1) {
-                   p = points[i + 1];
-               } else {
-                   p = [o[0] + proj * s[0], o[1] + proj * s[1]];
-               }
+           var array = toObject$1(this);

 
 

-               var d = dist(p, point);
-               if (d < min) {
-                   min = d;
-                   idx = i + 1;
-                   loc = projection.invert(p);
-               }
+           if (STABLE_SORT) return comparefn === undefined ? nativeSort.call(array) : nativeSort.call(array, comparefn);
+
+           var items = [];
+           var arrayLength = toLength$4(array.length);
+           var itemsLength, index;
+
+           for (index = 0; index < arrayLength; index++) {
+             if (index in array) items.push(array[index]);

            }
 
            }
 

-           if (idx !== undefined) {
-               return { index: idx, distance: min, loc: loc };
-           } else {
-               return null;
+           items = internalSort(items, getSortCompare(comparefn));
+           itemsLength = items.length;
+           index = 0;
+
+           while (index < itemsLength) array[index] = items[index++];
+           while (index < arrayLength) delete array[index++];
+
+           return array;
+         }
+       });
+
+       var e10 = Math.sqrt(50),
+           e5 = Math.sqrt(10),
+           e2 = Math.sqrt(2);
+       function ticks (start, stop, count) {
+         var reverse,
+             i = -1,
+             n,
+             ticks,
+             step;
+         stop = +stop, start = +start, count = +count;
+         if (start === stop && count > 0) return [start];
+         if (reverse = stop < start) n = start, start = stop, stop = n;
+         if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];
+
+         if (step > 0) {
+           var r0 = Math.round(start / step),
+               r1 = Math.round(stop / step);
+           if (r0 * step < start) ++r0;
+           if (r1 * step > stop) --r1;
+           ticks = new Array(n = r1 - r0 + 1);
+
+           while (++i < n) {
+             ticks[i] = (r0 + i) * step;

            }
            }

-       }
+         } else {
+           step = -step;

 
 

+           var _r = Math.round(start * step),
+               _r2 = Math.round(stop * step);

 
 

-       // Test active (dragged or drawing) segments against inactive segments
-       // This is used to test e.g. multipolygon rings that cross
-       // `activeNodes` is the ring containing the activeID being dragged.
-       // `inactiveNodes` is the other ring to test against
-       function geoHasLineIntersections(activeNodes, inactiveNodes, activeID) {
-           var actives = [];
-           var inactives = [];
-           var j, k, n1, n2, segment;
-
-           // gather active segments (only segments in activeNodes that contain the activeID)
-           for (j = 0; j < activeNodes.length - 1; j++) {
-               n1 = activeNodes[j];
-               n2 = activeNodes[j+1];
-               segment = [n1.loc, n2.loc];
-               if (n1.id === activeID || n2.id === activeID) {
-                   actives.push(segment);
-               }
-           }
-
-           // gather inactive segments
-           for (j = 0; j < inactiveNodes.length - 1; j++) {
-               n1 = inactiveNodes[j];
-               n2 = inactiveNodes[j+1];
-               segment = [n1.loc, n2.loc];
-               inactives.push(segment);
-           }
-
-           // test
-           for (j = 0; j < actives.length; j++) {
-               for (k = 0; k < inactives.length; k++) {
-                   var p = actives[j];
-                   var q = inactives[k];
-                   var hit = geoLineIntersection(p, q);
-                   if (hit) {
-                       return true;
-                   }
-               }
+           if (_r / step < start) ++_r;
+           if (_r2 / step > stop) --_r2;
+           ticks = new Array(n = _r2 - _r + 1);
+
+           while (++i < n) {
+             ticks[i] = (_r + i) / step;

            }
            }

+         }

 
 

-           return false;
+         if (reverse) ticks.reverse();
+         return ticks;
+       }
+       function tickIncrement(start, stop, count) {
+         var step = (stop - start) / Math.max(0, count),
+             power = Math.floor(Math.log(step) / Math.LN10),
+             error = step / Math.pow(10, power);
+         return power >= 0 ? (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1) * Math.pow(10, power) : -Math.pow(10, -power) / (error >= e10 ? 10 : error >= e5 ? 5 : error >= e2 ? 2 : 1);
+       }
+       function tickStep(start, stop, count) {
+         var step0 = Math.abs(stop - start) / Math.max(0, count),
+             step1 = Math.pow(10, Math.floor(Math.log(step0) / Math.LN10)),
+             error = step0 / step1;
+         if (error >= e10) step1 *= 10;else if (error >= e5) step1 *= 5;else if (error >= e2) step1 *= 2;
+         return stop < start ? -step1 : step1;

        }
 
        }
 

+       function max(values, valueof) {
+         var max;

 
 

-       // Test active (dragged or drawing) segments against inactive segments
-       // This is used to test whether a way intersects with itself.
-       function geoHasSelfIntersections(nodes, activeID) {
-           var actives = [];
-           var inactives = [];
-           var j, k;
-
-           // group active and passive segments along the nodes
-           for (j = 0; j < nodes.length - 1; j++) {
-               var n1 = nodes[j];
-               var n2 = nodes[j+1];
-               var segment = [n1.loc, n2.loc];
-               if (n1.id === activeID || n2.id === activeID) {
-                   actives.push(segment);
-               } else {
-                   inactives.push(segment);
+         if (valueof === undefined) {
+           var _iterator = _createForOfIteratorHelper(values),
+               _step;
+
+           try {
+             for (_iterator.s(); !(_step = _iterator.n()).done;) {
+               var value = _step.value;
+
+               if (value != null && (max < value || max === undefined && value >= value)) {
+                 max = value;

                }
                }

+             }
+           } catch (err) {
+             _iterator.e(err);
+           } finally {
+             _iterator.f();

            }
            }

+         } else {
+           var index = -1;

 
 

-           // test
-           for (j = 0; j < actives.length; j++) {
-               for (k = 0; k < inactives.length; k++) {
-                   var p = actives[j];
-                   var q = inactives[k];
-                   // skip if segments share an endpoint
-                   if (geoVecEqual(p[1], q[0]) || geoVecEqual(p[0], q[1]) ||
-                       geoVecEqual(p[0], q[0]) || geoVecEqual(p[1], q[1]) ) {
-                       continue;
-                   }
+           var _iterator2 = _createForOfIteratorHelper(values),
+               _step2;

 
 

-                   var hit = geoLineIntersection(p, q);
-                   if (hit) {
-                       var epsilon = 1e-8;
-                       // skip if the hit is at the segment's endpoint
-                       if (geoVecEqual(p[1], hit, epsilon) || geoVecEqual(p[0], hit, epsilon) ||
-                           geoVecEqual(q[1], hit, epsilon) || geoVecEqual(q[0], hit, epsilon) ) {
-                           continue;
-                       } else {
-                           return true;
-                       }
-                   }
+           try {
+             for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+               var _value = _step2.value;
+
+               if ((_value = valueof(_value, ++index, values)) != null && (max < _value || max === undefined && _value >= _value)) {
+                 max = _value;

                }
                }

+             }
+           } catch (err) {
+             _iterator2.e(err);
+           } finally {
+             _iterator2.f();

            }
            }

+         }

 
 

-           return false;
+         return max;

        }
 
        }
 

+       function min$2(values, valueof) {
+         var min;

 
 

-       // Return the intersection point of 2 line segments.
-       // From https://github.com/pgkelley4/line-segments-intersect
-       // This uses the vector cross product approach described below:
-       //  http://stackoverflow.com/a/565282/786339
-       function geoLineIntersection(a, b) {
-           var p = [a[0][0], a[0][1]];
-           var p2 = [a[1][0], a[1][1]];
-           var q = [b[0][0], b[0][1]];
-           var q2 = [b[1][0], b[1][1]];
-           var r = geoVecSubtract(p2, p);
-           var s = geoVecSubtract(q2, q);
-           var uNumerator = geoVecCross(geoVecSubtract(q, p), r);
-           var denominator = geoVecCross(r, s);
+         if (valueof === undefined) {
+           var _iterator = _createForOfIteratorHelper(values),
+               _step;

 
 

-           if (uNumerator && denominator) {
-               var u = uNumerator / denominator;
-               var t = geoVecCross(geoVecSubtract(q, p), s) / denominator;
+           try {
+             for (_iterator.s(); !(_step = _iterator.n()).done;) {
+               var value = _step.value;

 
 

-               if ((t >= 0) && (t <= 1) && (u >= 0) && (u <= 1)) {
-                   return geoVecInterp(p, p2, t);
+               if (value != null && (min > value || min === undefined && value >= value)) {
+                 min = value;

                }
                }

+             }
+           } catch (err) {
+             _iterator.e(err);
+           } finally {
+             _iterator.f();

            }
            }

+         } else {
+           var index = -1;

 
 

-           return null;
-       }
+           var _iterator2 = _createForOfIteratorHelper(values),
+               _step2;

 
 

+           try {
+             for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+               var _value = _step2.value;

 
 

-       function geoPathIntersections(path1, path2) {
-           var intersections = [];
-           for (var i = 0; i < path1.length - 1; i++) {
-               for (var j = 0; j < path2.length - 1; j++) {
-                   var a = [ path1[i], path1[i+1] ];
-                   var b = [ path2[j], path2[j+1] ];
-                   var hit = geoLineIntersection(a, b);
-                   if (hit) {
-                       intersections.push(hit);
-                   }
+               if ((_value = valueof(_value, ++index, values)) != null && (min > _value || min === undefined && _value >= _value)) {
+                 min = _value;

                }
                }

+             }
+           } catch (err) {
+             _iterator2.e(err);
+           } finally {
+             _iterator2.f();

            }
            }

-           return intersections;
+         }
+
+         return min;

        }
 
        }
 

-       function geoPathHasIntersections(path1, path2) {
-           for (var i = 0; i < path1.length - 1; i++) {
-               for (var j = 0; j < path2.length - 1; j++) {
-                   var a = [ path1[i], path1[i+1] ];
-                   var b = [ path2[j], path2[j+1] ];
-                   var hit = geoLineIntersection(a, b);
-                   if (hit) {
-                       return true;
-                   }
-               }
+       // ISC license, Copyright 2018 Vladimir Agafonkin.
+
+       function quickselect$3(array, k) {
+         var left = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
+         var right = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : array.length - 1;
+         var compare = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : d3_ascending;
+
+         while (right > left) {
+           if (right - left > 600) {
+             var n = right - left + 1;
+             var m = k - left + 1;
+             var z = Math.log(n);
+             var s = 0.5 * Math.exp(2 * z / 3);
+             var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+             var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+             var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+             quickselect$3(array, k, newLeft, newRight, compare);

            }
            }

-           return false;
-       }

 
 

+           var t = array[k];
+           var i = left;
+           var j = right;
+           swap$1(array, left, k);
+           if (compare(array[right], t) > 0) swap$1(array, left, right);

 
 

-       // Return whether point is contained in polygon.
-       //
-       // `point` should be a 2-item array of coordinates.
-       // `polygon` should be an array of 2-item arrays of coordinates.
-       //
-       // From https://github.com/substack/point-in-polygon.
-       // ray-casting algorithm based on
-       // http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
-       //
-       function geoPointInPolygon(point, polygon) {
-           var x = point[0];
-           var y = point[1];
-           var inside = false;
+           while (i < j) {
+             swap$1(array, i, j), ++i, --j;

 
 

-           for (var i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
-               var xi = polygon[i][0];
-               var yi = polygon[i][1];
-               var xj = polygon[j][0];
-               var yj = polygon[j][1];
+             while (compare(array[i], t) < 0) {
+               ++i;
+             }

 
 

-               var intersect = ((yi > y) !== (yj > y)) &&
-                   (x < (xj - xi) * (y - yi) / (yj - yi) + xi);
-               if (intersect) { inside = !inside; }
+             while (compare(array[j], t) > 0) {
+               --j;
+             }

            }
 
            }
 

-           return inside;
-       }
-
+           if (compare(array[left], t) === 0) swap$1(array, left, j);else ++j, swap$1(array, j, right);
+           if (j <= k) left = j + 1;
+           if (k <= j) right = j - 1;
+         }

 
 

-       function geoPolygonContainsPolygon(outer, inner) {
-           return inner.every(function(point) {
-               return geoPointInPolygon(point, outer);
-           });
+         return array;

        }
 
        }
 

+       function swap$1(array, i, j) {
+         var t = array[i];
+         array[i] = array[j];
+         array[j] = t;
+       }

 
 

-       function geoPolygonIntersectsPolygon(outer, inner, checkSegments) {
-           function testPoints(outer, inner) {
-               return inner.some(function(point) {
-                   return geoPointInPolygon(point, outer);
-               });
-           }
+       function quantile(values, p, valueof) {
+         values = Float64Array.from(numbers(values, valueof));
+         if (!(n = values.length)) return;
+         if ((p = +p) <= 0 || n < 2) return min$2(values);
+         if (p >= 1) return max(values);
+         var n,
+             i = (n - 1) * p,
+             i0 = Math.floor(i),
+             value0 = max(quickselect$3(values, i0).subarray(0, i0 + 1)),
+             value1 = min$2(values.subarray(i0 + 1));
+         return value0 + (value1 - value0) * (i - i0);
+       }

 
 

-          return testPoints(outer, inner) || (!!checkSegments && geoPathHasIntersections(outer, inner));
+       function d3_median (values, valueof) {
+         return quantile(values, 0.5, valueof);

        }
 
        }
 

+       var _marked$2 = /*#__PURE__*/regeneratorRuntime.mark(flatten);

 
 

-       // http://gis.stackexchange.com/questions/22895/finding-minimum-area-rectangle-for-given-points
-       // http://gis.stackexchange.com/questions/3739/generalisation-strategies-for-building-outlines/3756#3756
-       function geoGetSmallestSurroundingRectangle(points) {
-           var hull = d3_polygonHull(points);
-           var centroid = d3_polygonCentroid(hull);
-           var minArea = Infinity;
-           var ssrExtent = [];
-           var ssrAngle = 0;
-           var c1 = hull[0];
-
-           for (var i = 0; i <= hull.length - 1; i++) {
-               var c2 = (i === hull.length - 1) ? hull[0] : hull[i + 1];
-               var angle = Math.atan2(c2[1] - c1[1], c2[0] - c1[0]);
-               var poly = geoRotate(hull, -angle, centroid);
-               var extent = poly.reduce(function(extent, point) {
-                   return extent.extend(geoExtent(point));
-               }, geoExtent());
-
-               var area = extent.area();
-               if (area < minArea) {
-                   minArea = area;
-                   ssrExtent = extent;
-                   ssrAngle = angle;
-               }
-               c1 = c2;
-           }
+       function flatten(arrays) {
+         var _iterator, _step, array;

 
 

-           return {
-               poly: geoRotate(ssrExtent.polygon(), ssrAngle, centroid),
-               angle: ssrAngle
-           };
-       }
+         return regeneratorRuntime.wrap(function flatten$(_context) {
+           while (1) {
+             switch (_context.prev = _context.next) {
+               case 0:
+                 _iterator = _createForOfIteratorHelper(arrays);
+                 _context.prev = 1;

 
 

+                 _iterator.s();

 
 

-       function geoPathLength(path) {
-           var length = 0;
-           for (var i = 0; i < path.length - 1; i++) {
-               length += geoVecLength(path[i], path[i + 1]);
-           }
-           return length;
-       }
+               case 3:
+                 if ((_step = _iterator.n()).done) {
+                   _context.next = 8;
+                   break;
+                 }

 
 

+                 array = _step.value;
+                 return _context.delegateYield(array, "t0", 6);

 
 

-       // If the given point is at the edge of the padded viewport,
-       // return a vector that will nudge the viewport in that direction
-       function geoViewportEdge(point, dimensions) {
-           var pad = [80, 20, 50, 20];   // top, right, bottom, left
-           var x = 0;
-           var y = 0;
-
-           if (point[0] > dimensions[0] - pad[1])
-               { x = -10; }
-           if (point[0] < pad[3])
-               { x = 10; }
-           if (point[1] > dimensions[1] - pad[2])
-               { y = -10; }
-           if (point[1] < pad[0])
-               { y = 10; }
-
-           if (x || y) {
-               return [x, y];
-           } else {
-               return null;
-           }
-       }
+               case 6:
+                 _context.next = 3;
+                 break;

 
 

-       var noop$3 = {value: function() {}};
+               case 8:
+                 _context.next = 13;
+                 break;

 
 

-       function dispatch() {
-         var arguments$1 = arguments;
+               case 10:
+                 _context.prev = 10;
+                 _context.t1 = _context["catch"](1);

 
 

-         for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
-           if (!(t = arguments$1[i] + "") || (t in _) || /[\s.]/.test(t)) { throw new Error("illegal type: " + t); }
-           _[t] = [];
-         }
-         return new Dispatch(_);
-       }
+                 _iterator.e(_context.t1);

 
 

-       function Dispatch(_) {
-         this._ = _;
-       }
+               case 13:
+                 _context.prev = 13;

 
 

-       function parseTypenames(typenames, types) {
-         return typenames.trim().split(/^|\s+/).map(function(t) {
-           var name = "", i = t.indexOf(".");
-           if (i >= 0) { name = t.slice(i + 1), t = t.slice(0, i); }
-           if (t && !types.hasOwnProperty(t)) { throw new Error("unknown type: " + t); }
-           return {type: t, name: name};
-         });
-       }
+                 _iterator.f();

 
 

-       Dispatch.prototype = dispatch.prototype = {
-         constructor: Dispatch,
-         on: function(typename, callback) {
-           var _ = this._,
-               T = parseTypenames(typename + "", _),
-               t,
-               i = -1,
-               n = T.length;
+                 return _context.finish(13);

 
 

-           // If no callback was specified, return the callback of the given type and name.
-           if (arguments.length < 2) {
-             while (++i < n) { if ((t = (typename = T[i]).type) && (t = get$1(_[t], typename.name))) { return t; } }
-             return;
+               case 16:
+               case "end":
+                 return _context.stop();
+             }

            }
            }

+         }, _marked$2, null, [[1, 10, 13, 16]]);
+       }

 
 

-           // If a type was specified, set the callback for the given type and name.
-           // Otherwise, if a null callback was specified, remove callbacks of the given name.
-           if (callback != null && typeof callback !== "function") { throw new Error("invalid callback: " + callback); }
-           while (++i < n) {
-             if (t = (typename = T[i]).type) { _[t] = set(_[t], typename.name, callback); }
-             else if (callback == null) { for (t in _) { _[t] = set(_[t], typename.name, null); } }
-           }
+       function merge$4(arrays) {
+         return Array.from(flatten(arrays));
+       }

 
 

-           return this;
-         },
-         copy: function() {
-           var copy = {}, _ = this._;
-           for (var t in _) { copy[t] = _[t].slice(); }
-           return new Dispatch(copy);
-         },
-         call: function(type, that) {
-           var arguments$1 = arguments;
+       function range$1 (start, stop, step) {
+         start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
+         var i = -1,
+             n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
+             range = new Array(n);

 
 

-           if ((n = arguments.length - 2) > 0) { for (var args = new Array(n), i = 0, n, t; i < n; ++i) { args[i] = arguments$1[i + 2]; } }
-           if (!this._.hasOwnProperty(type)) { throw new Error("unknown type: " + type); }
-           for (t = this._[type], i = 0, n = t.length; i < n; ++i) { t[i].value.apply(that, args); }
-         },
-         apply: function(type, that, args) {
-           if (!this._.hasOwnProperty(type)) { throw new Error("unknown type: " + type); }
-           for (var t = this._[type], i = 0, n = t.length; i < n; ++i) { t[i].value.apply(that, args); }
+         while (++i < n) {
+           range[i] = start + i * step;

          }
          }

-       };

 
 

-       function get$1(type, name) {
-         for (var i = 0, n = type.length, c; i < n; ++i) {
-           if ((c = type[i]).name === name) {
-             return c.value;
-           }
-         }
+         return range;

        }
 
        }
 

-       function set(type, name, callback) {
-         for (var i = 0, n = type.length; i < n; ++i) {
-           if (type[i].name === name) {
-             type[i] = noop$3, type = type.slice(0, i).concat(type.slice(i + 1));
-             break;
-           }
-         }
-         if (callback != null) { type.push({name: name, value: callback}); }
-         return type;
-       }
+       // `SameValue` abstract operation
+       // https://tc39.es/ecma262/#sec-samevalue
+       // eslint-disable-next-line es/no-object-is -- safe
+       var sameValue$1 = Object.is || function is(x, y) {
+         // eslint-disable-next-line no-self-compare -- NaN check
+         return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;
+       };

 
 

-       var xhtml = "http://www.w3.org/1999/xhtml";
+       var $$r = _export;

 
 

-       var namespaces = {
-         svg: "http://www.w3.org/2000/svg",
-         xhtml: xhtml,
-         xlink: "http://www.w3.org/1999/xlink",
-         xml: "http://www.w3.org/XML/1998/namespace",
-         xmlns: "http://www.w3.org/2000/xmlns/"
+       // eslint-disable-next-line es/no-math-hypot -- required for testing
+       var $hypot = Math.hypot;
+       var abs$3 = Math.abs;
+       var sqrt$1 = Math.sqrt;
+
+       // Chrome 77 bug
+       // https://bugs.chromium.org/p/v8/issues/detail?id=9546
+       var BUGGY = !!$hypot && $hypot(Infinity, NaN) !== Infinity;
+
+       // `Math.hypot` method
+       // https://tc39.es/ecma262/#sec-math.hypot
+       $$r({ target: 'Math', stat: true, forced: BUGGY }, {
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         hypot: function hypot(value1, value2) {
+           var sum = 0;
+           var i = 0;
+           var aLen = arguments.length;
+           var larg = 0;
+           var arg, div;
+           while (i < aLen) {
+             arg = abs$3(arguments[i++]);
+             if (larg < arg) {
+               div = larg / arg;
+               sum = sum * div * div + 1;
+               larg = arg;
+             } else if (arg > 0) {
+               div = arg / larg;
+               sum += div * div;
+             } else sum += arg;
+           }
+           return larg === Infinity ? Infinity : larg * sqrt$1(sum);
+         }
+       });
+
+       // `Math.sign` method implementation
+       // https://tc39.es/ecma262/#sec-math.sign
+       // eslint-disable-next-line es/no-math-sign -- safe
+       var mathSign = Math.sign || function sign(x) {
+         // eslint-disable-next-line no-self-compare -- NaN check
+         return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;

        };
 
        };
 

-       function namespace(name) {
-         var prefix = name += "", i = prefix.indexOf(":");
-         if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") { name = name.slice(i + 1); }
-         return namespaces.hasOwnProperty(prefix) ? {space: namespaces[prefix], local: name} : name;
-       }
+       var $$q = _export;
+       var sign$1 = mathSign;

 
 

-       function creatorInherit(name) {
-         return function() {
-           var document = this.ownerDocument,
-               uri = this.namespaceURI;
-           return uri === xhtml && document.documentElement.namespaceURI === xhtml
-               ? document.createElement(name)
-               : document.createElementNS(uri, name);
-         };
-       }
+       // `Math.sign` method
+       // https://tc39.es/ecma262/#sec-math.sign
+       $$q({ target: 'Math', stat: true }, {
+         sign: sign$1
+       });

 
 

-       function creatorFixed(fullname) {
-         return function() {
-           return this.ownerDocument.createElementNS(fullname.space, fullname.local);
-         };
+       var epsilon$1 = 1e-6;
+       var epsilon2$1 = 1e-12;
+       var pi = Math.PI;
+       var halfPi = pi / 2;
+       var quarterPi = pi / 4;
+       var tau = pi * 2;
+       var degrees$1 = 180 / pi;
+       var radians = pi / 180;
+       var abs$2 = Math.abs;
+       var atan = Math.atan;
+       var atan2 = Math.atan2;
+       var cos = Math.cos;
+       var exp$2 = Math.exp;
+       var log$1 = Math.log;
+       var sin = Math.sin;
+       var sign = Math.sign || function (x) {
+         return x > 0 ? 1 : x < 0 ? -1 : 0;
+       };
+       var sqrt = Math.sqrt;
+       var tan = Math.tan;
+       function acos(x) {
+         return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);

        }
        }

-
-       function creator(name) {
-         var fullname = namespace(name);
-         return (fullname.local
-             ? creatorFixed
-             : creatorInherit)(fullname);
+       function asin(x) {
+         return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);

        }
 
        }
 

-       function none() {}
+       function noop$1() {}

 
 

-       function selector(selector) {
-         return selector == null ? none : function() {
-           return this.querySelector(selector);
-         };
+       function streamGeometry(geometry, stream) {
+         if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
+           streamGeometryType[geometry.type](geometry, stream);
+         }

        }
 
        }
 

-       function selection_select(select) {
-         if (typeof select !== "function") { select = selector(select); }
+       var streamObjectType = {
+         Feature: function Feature(object, stream) {
+           streamGeometry(object.geometry, stream);
+         },
+         FeatureCollection: function FeatureCollection(object, stream) {
+           var features = object.features,
+               i = -1,
+               n = features.length;

 
 

-         for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-           for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
-             if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
-               if ("__data__" in node) { subnode.__data__ = node.__data__; }
-               subgroup[i] = subnode;
-             }
+           while (++i < n) {
+             streamGeometry(features[i].geometry, stream);

            }
          }
            }
          }

+       };
+       var streamGeometryType = {
+         Sphere: function Sphere(object, stream) {
+           stream.sphere();
+         },
+         Point: function Point(object, stream) {
+           object = object.coordinates;
+           stream.point(object[0], object[1], object[2]);
+         },
+         MultiPoint: function MultiPoint(object, stream) {
+           var coordinates = object.coordinates,
+               i = -1,
+               n = coordinates.length;

 
 

-         return new Selection(subgroups, this._parents);
-       }
-
-       function empty() {
-         return [];
-       }
+           while (++i < n) {
+             object = coordinates[i], stream.point(object[0], object[1], object[2]);
+           }
+         },
+         LineString: function LineString(object, stream) {
+           streamLine(object.coordinates, stream, 0);
+         },
+         MultiLineString: function MultiLineString(object, stream) {
+           var coordinates = object.coordinates,
+               i = -1,
+               n = coordinates.length;

 
 

-       function selectorAll(selector) {
-         return selector == null ? empty : function() {
-           return this.querySelectorAll(selector);
-         };
-       }
+           while (++i < n) {
+             streamLine(coordinates[i], stream, 0);
+           }
+         },
+         Polygon: function Polygon(object, stream) {
+           streamPolygon(object.coordinates, stream);
+         },
+         MultiPolygon: function MultiPolygon(object, stream) {
+           var coordinates = object.coordinates,
+               i = -1,
+               n = coordinates.length;

 
 

-       function selection_selectAll(select) {
-         if (typeof select !== "function") { select = selectorAll(select); }
+           while (++i < n) {
+             streamPolygon(coordinates[i], stream);
+           }
+         },
+         GeometryCollection: function GeometryCollection(object, stream) {
+           var geometries = object.geometries,
+               i = -1,
+               n = geometries.length;

 
 

-         for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
-           for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-             if (node = group[i]) {
-               subgroups.push(select.call(node, node.__data__, i, group));
-               parents.push(node);
-             }
+           while (++i < n) {
+             streamGeometry(geometries[i], stream);

            }
          }
            }
          }

+       };

 
 

-         return new Selection(subgroups, parents);
-       }
+       function streamLine(coordinates, stream, closed) {
+         var i = -1,
+             n = coordinates.length - closed,
+             coordinate;
+         stream.lineStart();

 
 

-       function matcher(selector) {
-         return function() {
-           return this.matches(selector);
-         };
+         while (++i < n) {
+           coordinate = coordinates[i], stream.point(coordinate[0], coordinate[1], coordinate[2]);
+         }
+
+         stream.lineEnd();

        }
 
        }
 

-       function selection_filter(match) {
-         if (typeof match !== "function") { match = matcher(match); }
+       function streamPolygon(coordinates, stream) {
+         var i = -1,
+             n = coordinates.length;
+         stream.polygonStart();

 
 

-         for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-           for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
-             if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
-               subgroup.push(node);
-             }
-           }
+         while (++i < n) {
+           streamLine(coordinates[i], stream, 1);

          }
 
          }
 

-         return new Selection(subgroups, this._parents);
-       }
-
-       function sparse(update) {
-         return new Array(update.length);
+         stream.polygonEnd();

        }
 
        }
 

-       function selection_enter() {
-         return new Selection(this._enter || this._groups.map(sparse), this._parents);
+       function d3_geoStream (object, stream) {
+         if (object && streamObjectType.hasOwnProperty(object.type)) {
+           streamObjectType[object.type](object, stream);
+         } else {
+           streamGeometry(object, stream);
+         }

        }
 
        }
 

-       function EnterNode(parent, datum) {
-         this.ownerDocument = parent.ownerDocument;
-         this.namespaceURI = parent.namespaceURI;
-         this._next = null;
-         this._parent = parent;
-         this.__data__ = datum;
-       }
+       var areaRingSum$1 = new Adder(); // hello?

 
 

-       EnterNode.prototype = {
-         constructor: EnterNode,
-         appendChild: function(child) { return this._parent.insertBefore(child, this._next); },
-         insertBefore: function(child, next) { return this._parent.insertBefore(child, next); },
-         querySelector: function(selector) { return this._parent.querySelector(selector); },
-         querySelectorAll: function(selector) { return this._parent.querySelectorAll(selector); }
+       var areaSum$1 = new Adder(),
+           lambda00$1,
+           phi00$1,
+           lambda0$2,
+           cosPhi0$1,
+           sinPhi0$1;
+       var areaStream$1 = {
+         point: noop$1,
+         lineStart: noop$1,
+         lineEnd: noop$1,
+         polygonStart: function polygonStart() {
+           areaRingSum$1 = new Adder();
+           areaStream$1.lineStart = areaRingStart$1;
+           areaStream$1.lineEnd = areaRingEnd$1;
+         },
+         polygonEnd: function polygonEnd() {
+           var areaRing = +areaRingSum$1;
+           areaSum$1.add(areaRing < 0 ? tau + areaRing : areaRing);
+           this.lineStart = this.lineEnd = this.point = noop$1;
+         },
+         sphere: function sphere() {
+           areaSum$1.add(tau);
+         }

        };
 
        };
 

-       function constant(x) {
-         return function() {
-           return x;
-         };
+       function areaRingStart$1() {
+         areaStream$1.point = areaPointFirst$1;

        }
 
        }
 

-       var keyPrefix = "$"; // Protect against keys like “__proto__”.
+       function areaRingEnd$1() {
+         areaPoint$1(lambda00$1, phi00$1);
+       }

 
 

-       function bindIndex(parent, group, enter, update, exit, data) {
-         var i = 0,
-             node,
-             groupLength = group.length,
-             dataLength = data.length;
+       function areaPointFirst$1(lambda, phi) {
+         areaStream$1.point = areaPoint$1;
+         lambda00$1 = lambda, phi00$1 = phi;
+         lambda *= radians, phi *= radians;
+         lambda0$2 = lambda, cosPhi0$1 = cos(phi = phi / 2 + quarterPi), sinPhi0$1 = sin(phi);
+       }

 
 

-         // Put any non-null nodes that fit into update.
-         // Put any null nodes into enter.
-         // Put any remaining data into enter.
-         for (; i < dataLength; ++i) {
-           if (node = group[i]) {
-             node.__data__ = data[i];
-             update[i] = node;
-           } else {
-             enter[i] = new EnterNode(parent, data[i]);
-           }
-         }
+       function areaPoint$1(lambda, phi) {
+         lambda *= radians, phi *= radians;
+         phi = phi / 2 + quarterPi; // half the angular distance from south pole
+         // Spherical excess E for a spherical triangle with vertices: south pole,
+         // previous point, current point.  Uses a formula derived from Cagnoli’s
+         // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).

 
 

-         // Put any non-null nodes that don’t fit into exit.
-         for (; i < groupLength; ++i) {
-           if (node = group[i]) {
-             exit[i] = node;
-           }
-         }
+         var dLambda = lambda - lambda0$2,
+             sdLambda = dLambda >= 0 ? 1 : -1,
+             adLambda = sdLambda * dLambda,
+             cosPhi = cos(phi),
+             sinPhi = sin(phi),
+             k = sinPhi0$1 * sinPhi,
+             u = cosPhi0$1 * cosPhi + k * cos(adLambda),
+             v = k * sdLambda * sin(adLambda);
+         areaRingSum$1.add(atan2(v, u)); // Advance the previous points.
+
+         lambda0$2 = lambda, cosPhi0$1 = cosPhi, sinPhi0$1 = sinPhi;

        }
 
        }
 

-       function bindKey(parent, group, enter, update, exit, data, key) {
-         var i,
-             node,
-             nodeByKeyValue = {},
-             groupLength = group.length,
-             dataLength = data.length,
-             keyValues = new Array(groupLength),
-             keyValue;
+       function d3_geoArea (object) {
+         areaSum$1 = new Adder();
+         d3_geoStream(object, areaStream$1);
+         return areaSum$1 * 2;
+       }

 
 

-         // Compute the key for each node.
-         // If multiple nodes have the same key, the duplicates are added to exit.
-         for (i = 0; i < groupLength; ++i) {
-           if (node = group[i]) {
-             keyValues[i] = keyValue = keyPrefix + key.call(node, node.__data__, i, group);
-             if (keyValue in nodeByKeyValue) {
-               exit[i] = node;
-             } else {
-               nodeByKeyValue[keyValue] = node;
-             }
-           }
-         }
+       function spherical(cartesian) {
+         return [atan2(cartesian[1], cartesian[0]), asin(cartesian[2])];
+       }
+       function cartesian(spherical) {
+         var lambda = spherical[0],
+             phi = spherical[1],
+             cosPhi = cos(phi);
+         return [cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi)];
+       }
+       function cartesianDot(a, b) {
+         return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
+       }
+       function cartesianCross(a, b) {
+         return [a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]];
+       } // TODO return a

 
 

-         // Compute the key for each datum.
-         // If there a node associated with this key, join and add it to update.
-         // If there is not (or the key is a duplicate), add it to enter.
-         for (i = 0; i < dataLength; ++i) {
-           keyValue = keyPrefix + key.call(parent, data[i], i, data);
-           if (node = nodeByKeyValue[keyValue]) {
-             update[i] = node;
-             node.__data__ = data[i];
-             nodeByKeyValue[keyValue] = null;
-           } else {
-             enter[i] = new EnterNode(parent, data[i]);
-           }
-         }
+       function cartesianAddInPlace(a, b) {
+         a[0] += b[0], a[1] += b[1], a[2] += b[2];
+       }
+       function cartesianScale(vector, k) {
+         return [vector[0] * k, vector[1] * k, vector[2] * k];
+       } // TODO return d

 
 

-         // Add any remaining nodes that were not bound to data to exit.
-         for (i = 0; i < groupLength; ++i) {
-           if ((node = group[i]) && (nodeByKeyValue[keyValues[i]] === node)) {
-             exit[i] = node;
-           }
-         }
+       function cartesianNormalizeInPlace(d) {
+         var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
+         d[0] /= l, d[1] /= l, d[2] /= l;

        }
 
        }
 

-       function selection_data(value, key) {
-         if (!value) {
-           data = new Array(this.size()), j = -1;
-           this.each(function(d) { data[++j] = d; });
-           return data;
+       var lambda0$1, phi0, lambda1, phi1, // bounds
+       lambda2, // previous lambda-coordinate
+       lambda00, phi00, // first point
+       p0, // previous 3D point
+       deltaSum, ranges, range;
+       var boundsStream$1 = {
+         point: boundsPoint$1,
+         lineStart: boundsLineStart,
+         lineEnd: boundsLineEnd,
+         polygonStart: function polygonStart() {
+           boundsStream$1.point = boundsRingPoint;
+           boundsStream$1.lineStart = boundsRingStart;
+           boundsStream$1.lineEnd = boundsRingEnd;
+           deltaSum = new Adder();
+           areaStream$1.polygonStart();
+         },
+         polygonEnd: function polygonEnd() {
+           areaStream$1.polygonEnd();
+           boundsStream$1.point = boundsPoint$1;
+           boundsStream$1.lineStart = boundsLineStart;
+           boundsStream$1.lineEnd = boundsLineEnd;
+           if (areaRingSum$1 < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);else if (deltaSum > epsilon$1) phi1 = 90;else if (deltaSum < -epsilon$1) phi0 = -90;
+           range[0] = lambda0$1, range[1] = lambda1;
+         },
+         sphere: function sphere() {
+           lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);

          }
          }

+       };

 
 

-         var bind = key ? bindKey : bindIndex,
-             parents = this._parents,
-             groups = this._groups;
+       function boundsPoint$1(lambda, phi) {
+         ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
+         if (phi < phi0) phi0 = phi;
+         if (phi > phi1) phi1 = phi;
+       }

 
 

-         if (typeof value !== "function") { value = constant(value); }
+       function linePoint(lambda, phi) {
+         var p = cartesian([lambda * radians, phi * radians]);

 
 

-         for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
-           var parent = parents[j],
-               group = groups[j],
-               groupLength = group.length,
-               data = value.call(parent, parent && parent.__data__, j, parents),
-               dataLength = data.length,
-               enterGroup = enter[j] = new Array(dataLength),
-               updateGroup = update[j] = new Array(dataLength),
-               exitGroup = exit[j] = new Array(groupLength);
+         if (p0) {
+           var normal = cartesianCross(p0, p),
+               equatorial = [normal[1], -normal[0], 0],
+               inflection = cartesianCross(equatorial, normal);
+           cartesianNormalizeInPlace(inflection);
+           inflection = spherical(inflection);
+           var delta = lambda - lambda2,
+               sign = delta > 0 ? 1 : -1,
+               lambdai = inflection[0] * degrees$1 * sign,
+               phii,
+               antimeridian = abs$2(delta) > 180;

 
 

-           bind(parent, group, enterGroup, updateGroup, exitGroup, data, key);
+           if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
+             phii = inflection[1] * degrees$1;
+             if (phii > phi1) phi1 = phii;
+           } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
+             phii = -inflection[1] * degrees$1;
+             if (phii < phi0) phi0 = phii;
+           } else {
+             if (phi < phi0) phi0 = phi;
+             if (phi > phi1) phi1 = phi;
+           }

 
 

-           // Now connect the enter nodes to their following update node, such that
-           // appendChild can insert the materialized enter node before this node,
-           // rather than at the end of the parent node.
-           for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
-             if (previous = enterGroup[i0]) {
-               if (i0 >= i1) { i1 = i0 + 1; }
-               while (!(next = updateGroup[i1]) && ++i1 < dataLength){ }
-               previous._next = next || null;
+           if (antimeridian) {
+             if (lambda < lambda2) {
+               if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
+             } else {
+               if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
+             }
+           } else {
+             if (lambda1 >= lambda0$1) {
+               if (lambda < lambda0$1) lambda0$1 = lambda;
+               if (lambda > lambda1) lambda1 = lambda;
+             } else {
+               if (lambda > lambda2) {
+                 if (angle(lambda0$1, lambda) > angle(lambda0$1, lambda1)) lambda1 = lambda;
+               } else {
+                 if (angle(lambda, lambda1) > angle(lambda0$1, lambda1)) lambda0$1 = lambda;
+               }

              }
            }
              }
            }

+         } else {
+           ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);

          }
 
          }
 

-         update = new Selection(update, parents);
-         update._enter = enter;
-         update._exit = exit;
-         return update;
+         if (phi < phi0) phi0 = phi;
+         if (phi > phi1) phi1 = phi;
+         p0 = p, lambda2 = lambda;

        }
 
        }
 

-       function selection_exit() {
-         return new Selection(this._exit || this._groups.map(sparse), this._parents);
+       function boundsLineStart() {
+         boundsStream$1.point = linePoint;

        }
 
        }
 

-       function selection_join(onenter, onupdate, onexit) {
-         var enter = this.enter(), update = this, exit = this.exit();
-         enter = typeof onenter === "function" ? onenter(enter) : enter.append(onenter + "");
-         if (onupdate != null) { update = onupdate(update); }
-         if (onexit == null) { exit.remove(); } else { onexit(exit); }
-         return enter && update ? enter.merge(update).order() : update;
+       function boundsLineEnd() {
+         range[0] = lambda0$1, range[1] = lambda1;
+         boundsStream$1.point = boundsPoint$1;
+         p0 = null;

        }
 
        }
 

-       function selection_merge(selection) {
-
-         for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
-           for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
-             if (node = group0[i] || group1[i]) {
-               merge[i] = node;
-             }
-           }
-         }
-
-         for (; j < m0; ++j) {
-           merges[j] = groups0[j];
+       function boundsRingPoint(lambda, phi) {
+         if (p0) {
+           var delta = lambda - lambda2;
+           deltaSum.add(abs$2(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
+         } else {
+           lambda00 = lambda, phi00 = phi;

          }
 
          }
 

-         return new Selection(merges, this._parents);
+         areaStream$1.point(lambda, phi);
+         linePoint(lambda, phi);

        }
 
        }
 

-       function selection_order() {
-
-         for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
-           for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
-             if (node = group[i]) {
-               if (next && node.compareDocumentPosition(next) ^ 4) { next.parentNode.insertBefore(node, next); }
-               next = node;
-             }
-           }
-         }
-
-         return this;
+       function boundsRingStart() {
+         areaStream$1.lineStart();

        }
 
        }
 

-       function selection_sort(compare) {
-         if (!compare) { compare = ascending; }
-
-         function compareNode(a, b) {
-           return a && b ? compare(a.__data__, b.__data__) : !a - !b;
-         }
-
-         for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
-           for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
-             if (node = group[i]) {
-               sortgroup[i] = node;
-             }
-           }
-           sortgroup.sort(compareNode);
-         }
+       function boundsRingEnd() {
+         boundsRingPoint(lambda00, phi00);
+         areaStream$1.lineEnd();
+         if (abs$2(deltaSum) > epsilon$1) lambda0$1 = -(lambda1 = 180);
+         range[0] = lambda0$1, range[1] = lambda1;
+         p0 = null;
+       } // Finds the left-right distance between two longitudes.
+       // This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
+       // the distance between ±180° to be 360°.

 
 

-         return new Selection(sortgroups, this._parents).order();
-       }

 
 

-       function ascending(a, b) {
-         return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+       function angle(lambda0, lambda1) {
+         return (lambda1 -= lambda0) < 0 ? lambda1 + 360 : lambda1;

        }
 
        }
 

-       function selection_call() {
-         var callback = arguments[0];
-         arguments[0] = this;
-         callback.apply(null, arguments);
-         return this;
+       function rangeCompare(a, b) {
+         return a[0] - b[0];

        }
 
        }
 

-       function selection_nodes() {
-         var nodes = new Array(this.size()), i = -1;
-         this.each(function() { nodes[++i] = this; });
-         return nodes;
+       function rangeContains(range, x) {
+         return range[0] <= range[1] ? range[0] <= x && x <= range[1] : x < range[0] || range[1] < x;

        }
 
        }
 

-       function selection_node() {
-
-         for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
-           for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
-             var node = group[i];
-             if (node) { return node; }
-           }
-         }
+       function d3_geoBounds (feature) {
+         var i, n, a, b, merged, deltaMax, delta;
+         phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
+         ranges = [];
+         d3_geoStream(feature, boundsStream$1); // First, sort ranges by their minimum longitudes.

 
 

-         return null;
-       }
+         if (n = ranges.length) {
+           ranges.sort(rangeCompare); // Then, merge any ranges that overlap.

 
 

-       function selection_size() {
-         var size = 0;
-         this.each(function() { ++size; });
-         return size;
-       }
+           for (i = 1, a = ranges[0], merged = [a]; i < n; ++i) {
+             b = ranges[i];

 
 

-       function selection_empty() {
-         return !this.node();
-       }
+             if (rangeContains(a, b[0]) || rangeContains(a, b[1])) {
+               if (angle(a[0], b[1]) > angle(a[0], a[1])) a[1] = b[1];
+               if (angle(b[0], a[1]) > angle(a[0], a[1])) a[0] = b[0];
+             } else {
+               merged.push(a = b);
+             }
+           } // Finally, find the largest gap between the merged ranges.
+           // The final bounding box will be the inverse of this gap.

 
 

-       function selection_each(callback) {

 
 

-         for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
-           for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
-             if (node = group[i]) { callback.call(node, node.__data__, i, group); }
+           for (deltaMax = -Infinity, n = merged.length - 1, i = 0, a = merged[n]; i <= n; a = b, ++i) {
+             b = merged[i];
+             if ((delta = angle(a[1], b[0])) > deltaMax) deltaMax = delta, lambda0$1 = b[0], lambda1 = a[1];

            }
          }
 
            }
          }
 

-         return this;
+         ranges = range = null;
+         return lambda0$1 === Infinity || phi0 === Infinity ? [[NaN, NaN], [NaN, NaN]] : [[lambda0$1, phi0], [lambda1, phi1]];

        }
 
        }
 

-       function attrRemove(name) {
-         return function() {
-           this.removeAttribute(name);
-         };
-       }
+       function compose (a, b) {
+         function compose(x, y) {
+           return x = a(x, y), b(x[0], x[1]);
+         }

 
 

-       function attrRemoveNS(fullname) {
-         return function() {
-           this.removeAttributeNS(fullname.space, fullname.local);
+         if (a.invert && b.invert) compose.invert = function (x, y) {
+           return x = b.invert(x, y), x && a.invert(x[0], x[1]);

          };
          };

+         return compose;

        }
 
        }
 

-       function attrConstant(name, value) {
-         return function() {
-           this.setAttribute(name, value);
-         };
+       function rotationIdentity(lambda, phi) {
+         return [abs$2(lambda) > pi ? lambda + Math.round(-lambda / tau) * tau : lambda, phi];

        }
 
        }
 

-       function attrConstantNS(fullname, value) {
-         return function() {
-           this.setAttributeNS(fullname.space, fullname.local, value);
-         };
+       rotationIdentity.invert = rotationIdentity;
+       function rotateRadians(deltaLambda, deltaPhi, deltaGamma) {
+         return (deltaLambda %= tau) ? deltaPhi || deltaGamma ? compose(rotationLambda(deltaLambda), rotationPhiGamma(deltaPhi, deltaGamma)) : rotationLambda(deltaLambda) : deltaPhi || deltaGamma ? rotationPhiGamma(deltaPhi, deltaGamma) : rotationIdentity;

        }
 
        }
 

-       function attrFunction(name, value) {
-         return function() {
-           var v = value.apply(this, arguments);
-           if (v == null) { this.removeAttribute(name); }
-           else { this.setAttribute(name, v); }
+       function forwardRotationLambda(deltaLambda) {
+         return function (lambda, phi) {
+           return lambda += deltaLambda, [lambda > pi ? lambda - tau : lambda < -pi ? lambda + tau : lambda, phi];

          };
        }
 
          };
        }
 

-       function attrFunctionNS(fullname, value) {
-         return function() {
-           var v = value.apply(this, arguments);
-           if (v == null) { this.removeAttributeNS(fullname.space, fullname.local); }
-           else { this.setAttributeNS(fullname.space, fullname.local, v); }
-         };
+       function rotationLambda(deltaLambda) {
+         var rotation = forwardRotationLambda(deltaLambda);
+         rotation.invert = forwardRotationLambda(-deltaLambda);
+         return rotation;

        }
 
        }
 

-       function selection_attr(name, value) {
-         var fullname = namespace(name);
+       function rotationPhiGamma(deltaPhi, deltaGamma) {
+         var cosDeltaPhi = cos(deltaPhi),
+             sinDeltaPhi = sin(deltaPhi),
+             cosDeltaGamma = cos(deltaGamma),
+             sinDeltaGamma = sin(deltaGamma);

 
 

-         if (arguments.length < 2) {
-           var node = this.node();
-           return fullname.local
-               ? node.getAttributeNS(fullname.space, fullname.local)
-               : node.getAttribute(fullname);
+         function rotation(lambda, phi) {
+           var cosPhi = cos(phi),
+               x = cos(lambda) * cosPhi,
+               y = sin(lambda) * cosPhi,
+               z = sin(phi),
+               k = z * cosDeltaPhi + x * sinDeltaPhi;
+           return [atan2(y * cosDeltaGamma - k * sinDeltaGamma, x * cosDeltaPhi - z * sinDeltaPhi), asin(k * cosDeltaGamma + y * sinDeltaGamma)];

          }
 
          }
 

-         return this.each((value == null
-             ? (fullname.local ? attrRemoveNS : attrRemove) : (typeof value === "function"
-             ? (fullname.local ? attrFunctionNS : attrFunction)
-             : (fullname.local ? attrConstantNS : attrConstant)))(fullname, value));
-       }
+         rotation.invert = function (lambda, phi) {
+           var cosPhi = cos(phi),
+               x = cos(lambda) * cosPhi,
+               y = sin(lambda) * cosPhi,
+               z = sin(phi),
+               k = z * cosDeltaGamma - y * sinDeltaGamma;
+           return [atan2(y * cosDeltaGamma + z * sinDeltaGamma, x * cosDeltaPhi + k * sinDeltaPhi), asin(k * cosDeltaPhi - x * sinDeltaPhi)];
+         };

 
 

-       function defaultView(node) {
-         return (node.ownerDocument && node.ownerDocument.defaultView) // node is a Node
-             || (node.document && node) // node is a Window
-             || node.defaultView; // node is a Document
+         return rotation;

        }
 
        }
 

-       function styleRemove(name) {
-         return function() {
-           this.style.removeProperty(name);
-         };
-       }
+       function rotation (rotate) {
+         rotate = rotateRadians(rotate[0] * radians, rotate[1] * radians, rotate.length > 2 ? rotate[2] * radians : 0);

 
 

-       function styleConstant(name, value, priority) {
-         return function() {
-           this.style.setProperty(name, value, priority);
-         };
-       }
+         function forward(coordinates) {
+           coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
+           return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
+         }

 
 

-       function styleFunction(name, value, priority) {
-         return function() {
-           var v = value.apply(this, arguments);
-           if (v == null) { this.style.removeProperty(name); }
-           else { this.style.setProperty(name, v, priority); }
+         forward.invert = function (coordinates) {
+           coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
+           return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;

          };
          };

-       }

 
 

-       function selection_style(name, value, priority) {
-         return arguments.length > 1
-             ? this.each((value == null
-                   ? styleRemove : typeof value === "function"
-                   ? styleFunction
-                   : styleConstant)(name, value, priority == null ? "" : priority))
-             : styleValue(this.node(), name);
+         return forward;

        }
 
        }
 

-       function styleValue(node, name) {
-         return node.style.getPropertyValue(name)
-             || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
-       }
+       function circleStream(stream, radius, delta, direction, t0, t1) {
+         if (!delta) return;
+         var cosRadius = cos(radius),
+             sinRadius = sin(radius),
+             step = direction * delta;

 
 

-       function propertyRemove(name) {
-         return function() {
-           delete this[name];
-         };
-       }
+         if (t0 == null) {
+           t0 = radius + direction * tau;
+           t1 = radius - step / 2;
+         } else {
+           t0 = circleRadius(cosRadius, t0);
+           t1 = circleRadius(cosRadius, t1);
+           if (direction > 0 ? t0 < t1 : t0 > t1) t0 += direction * tau;
+         }

 
 

-       function propertyConstant(name, value) {
-         return function() {
-           this[name] = value;
-         };
+         for (var point, t = t0; direction > 0 ? t > t1 : t < t1; t -= step) {
+           point = spherical([cosRadius, -sinRadius * cos(t), -sinRadius * sin(t)]);
+           stream.point(point[0], point[1]);
+         }
+       } // Returns the signed angle of a cartesian point relative to [cosRadius, 0, 0].
+
+       function circleRadius(cosRadius, point) {
+         point = cartesian(point), point[0] -= cosRadius;
+         cartesianNormalizeInPlace(point);
+         var radius = acos(-point[1]);
+         return ((-point[2] < 0 ? -radius : radius) + tau - epsilon$1) % tau;

        }
 
        }
 

-       function propertyFunction(name, value) {
-         return function() {
-           var v = value.apply(this, arguments);
-           if (v == null) { delete this[name]; }
-           else { this[name] = v; }
+       function clipBuffer () {
+         var lines = [],
+             line;
+         return {
+           point: function point(x, y, m) {
+             line.push([x, y, m]);
+           },
+           lineStart: function lineStart() {
+             lines.push(line = []);
+           },
+           lineEnd: noop$1,
+           rejoin: function rejoin() {
+             if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
+           },
+           result: function result() {
+             var result = lines;
+             lines = [];
+             line = null;
+             return result;
+           }

          };
        }
 
          };
        }
 

-       function selection_property(name, value) {
-         return arguments.length > 1
-             ? this.each((value == null
-                 ? propertyRemove : typeof value === "function"
-                 ? propertyFunction
-                 : propertyConstant)(name, value))
-             : this.node()[name];
+       function pointEqual (a, b) {
+         return abs$2(a[0] - b[0]) < epsilon$1 && abs$2(a[1] - b[1]) < epsilon$1;

        }
 
        }
 

-       function classArray(string) {
-         return string.trim().split(/^|\s+/);
-       }
+       function Intersection(point, points, other, entry) {
+         this.x = point;
+         this.z = points;
+         this.o = other; // another intersection

 
 

-       function classList(node) {
-         return node.classList || new ClassList(node);
-       }
+         this.e = entry; // is an entry?

 
 

-       function ClassList(node) {
-         this._node = node;
-         this._names = classArray(node.getAttribute("class") || "");
-       }
+         this.v = false; // visited

 
 

-       ClassList.prototype = {
-         add: function(name) {
-           var i = this._names.indexOf(name);
-           if (i < 0) {
-             this._names.push(name);
-             this._node.setAttribute("class", this._names.join(" "));
-           }
-         },
-         remove: function(name) {
-           var i = this._names.indexOf(name);
-           if (i >= 0) {
-             this._names.splice(i, 1);
-             this._node.setAttribute("class", this._names.join(" "));
-           }
-         },
-         contains: function(name) {
-           return this._names.indexOf(name) >= 0;
-         }
-       };
+         this.n = this.p = null; // next & previous
+       } // A generalized polygon clipping algorithm: given a polygon that has been cut
+       // into its visible line segments, and rejoins the segments by interpolating
+       // along the clip edge.

 
 

-       function classedAdd(node, names) {
-         var list = classList(node), i = -1, n = names.length;
-         while (++i < n) { list.add(names[i]); }
-       }

 
 

-       function classedRemove(node, names) {
-         var list = classList(node), i = -1, n = names.length;
-         while (++i < n) { list.remove(names[i]); }
-       }
+       function clipRejoin (segments, compareIntersection, startInside, interpolate, stream) {
+         var subject = [],
+             clip = [],
+             i,
+             n;
+         segments.forEach(function (segment) {
+           if ((n = segment.length - 1) <= 0) return;
+           var n,
+               p0 = segment[0],
+               p1 = segment[n],
+               x;

 
 

-       function classedTrue(names) {
-         return function() {
-           classedAdd(this, names);
-         };
-       }
+           if (pointEqual(p0, p1)) {
+             if (!p0[2] && !p1[2]) {
+               stream.lineStart();

 
 

-       function classedFalse(names) {
-         return function() {
-           classedRemove(this, names);
-         };
-       }
+               for (i = 0; i < n; ++i) {
+                 stream.point((p0 = segment[i])[0], p0[1]);
+               }

 
 

-       function classedFunction(names, value) {
-         return function() {
-           (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
-         };
-       }
+               stream.lineEnd();
+               return;
+             } // handle degenerate cases by moving the point

 
 

-       function selection_classed(name, value) {
-         var names = classArray(name + "");

 
 

-         if (arguments.length < 2) {
-           var list = classList(this.node()), i = -1, n = names.length;
-           while (++i < n) { if (!list.contains(names[i])) { return false; } }
-           return true;
+             p1[0] += 2 * epsilon$1;
+           }
+
+           subject.push(x = new Intersection(p0, segment, null, true));
+           clip.push(x.o = new Intersection(p0, null, x, false));
+           subject.push(x = new Intersection(p1, segment, null, false));
+           clip.push(x.o = new Intersection(p1, null, x, true));
+         });
+         if (!subject.length) return;
+         clip.sort(compareIntersection);
+         link(subject);
+         link(clip);
+
+         for (i = 0, n = clip.length; i < n; ++i) {
+           clip[i].e = startInside = !startInside;

          }
 
          }
 

-         return this.each((typeof value === "function"
-             ? classedFunction : value
-             ? classedTrue
-             : classedFalse)(names, value));
-       }
+         var start = subject[0],
+             points,
+             point;

 
 

-       function textRemove() {
-         this.textContent = "";
-       }
+         while (1) {
+           // Find first unvisited intersection.
+           var current = start,
+               isSubject = true;

 
 

-       function textConstant(value) {
-         return function() {
-           this.textContent = value;
-         };
-       }
+           while (current.v) {
+             if ((current = current.n) === start) return;
+           }

 
 

-       function textFunction(value) {
-         return function() {
-           var v = value.apply(this, arguments);
-           this.textContent = v == null ? "" : v;
-         };
-       }
+           points = current.z;
+           stream.lineStart();

 
 

-       function selection_text(value) {
-         return arguments.length
-             ? this.each(value == null
-                 ? textRemove : (typeof value === "function"
-                 ? textFunction
-                 : textConstant)(value))
-             : this.node().textContent;
-       }
+           do {
+             current.v = current.o.v = true;

 
 

-       function htmlRemove() {
-         this.innerHTML = "";
-       }
+             if (current.e) {
+               if (isSubject) {
+                 for (i = 0, n = points.length; i < n; ++i) {
+                   stream.point((point = points[i])[0], point[1]);
+                 }
+               } else {
+                 interpolate(current.x, current.n.x, 1, stream);
+               }

 
 

-       function htmlConstant(value) {
-         return function() {
-           this.innerHTML = value;
-         };
-       }
+               current = current.n;
+             } else {
+               if (isSubject) {
+                 points = current.p.z;

 
 

-       function htmlFunction(value) {
-         return function() {
-           var v = value.apply(this, arguments);
-           this.innerHTML = v == null ? "" : v;
-         };
-       }
+                 for (i = points.length - 1; i >= 0; --i) {
+                   stream.point((point = points[i])[0], point[1]);
+                 }
+               } else {
+                 interpolate(current.x, current.p.x, -1, stream);
+               }

 
 

-       function selection_html(value) {
-         return arguments.length
-             ? this.each(value == null
-                 ? htmlRemove : (typeof value === "function"
-                 ? htmlFunction
-                 : htmlConstant)(value))
-             : this.node().innerHTML;
-       }
+               current = current.p;
+             }

 
 

-       function raise() {
-         if (this.nextSibling) { this.parentNode.appendChild(this); }
-       }
+             current = current.o;
+             points = current.z;
+             isSubject = !isSubject;
+           } while (!current.v);

 
 

-       function selection_raise() {
-         return this.each(raise);
+           stream.lineEnd();
+         }

        }
 
        }
 

-       function lower() {
-         if (this.previousSibling) { this.parentNode.insertBefore(this, this.parentNode.firstChild); }
-       }
+       function link(array) {
+         if (!(n = array.length)) return;
+         var n,
+             i = 0,
+             a = array[0],
+             b;

 
 

-       function selection_lower() {
-         return this.each(lower);
-       }
+         while (++i < n) {
+           a.n = b = array[i];
+           b.p = a;
+           a = b;
+         }

 
 

-       function selection_append(name) {
-         var create = typeof name === "function" ? name : creator(name);
-         return this.select(function() {
-           return this.appendChild(create.apply(this, arguments));
-         });
+         a.n = b = array[0];
+         b.p = a;

        }
 
        }
 

-       function constantNull() {
-         return null;
+       function longitude(point) {
+         if (abs$2(point[0]) <= pi) return point[0];else return sign(point[0]) * ((abs$2(point[0]) + pi) % tau - pi);

        }
 
        }
 

-       function selection_insert(name, before) {
-         var create = typeof name === "function" ? name : creator(name),
-             select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
-         return this.select(function() {
-           return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
-         });
-       }
+       function polygonContains (polygon, point) {
+         var lambda = longitude(point),
+             phi = point[1],
+             sinPhi = sin(phi),
+             normal = [sin(lambda), -cos(lambda), 0],
+             angle = 0,
+             winding = 0;
+         var sum = new Adder();
+         if (sinPhi === 1) phi = halfPi + epsilon$1;else if (sinPhi === -1) phi = -halfPi - epsilon$1;

 
 

-       function remove() {
-         var parent = this.parentNode;
-         if (parent) { parent.removeChild(this); }
-       }
+         for (var i = 0, n = polygon.length; i < n; ++i) {
+           if (!(m = (ring = polygon[i]).length)) continue;
+           var ring,
+               m,
+               point0 = ring[m - 1],
+               lambda0 = longitude(point0),
+               phi0 = point0[1] / 2 + quarterPi,
+               sinPhi0 = sin(phi0),
+               cosPhi0 = cos(phi0);

 
 

-       function selection_remove() {
-         return this.each(remove);
-       }
+           for (var j = 0; j < m; ++j, lambda0 = lambda1, sinPhi0 = sinPhi1, cosPhi0 = cosPhi1, point0 = point1) {
+             var point1 = ring[j],
+                 lambda1 = longitude(point1),
+                 phi1 = point1[1] / 2 + quarterPi,
+                 sinPhi1 = sin(phi1),
+                 cosPhi1 = cos(phi1),
+                 delta = lambda1 - lambda0,
+                 sign = delta >= 0 ? 1 : -1,
+                 absDelta = sign * delta,
+                 antimeridian = absDelta > pi,
+                 k = sinPhi0 * sinPhi1;
+             sum.add(atan2(k * sign * sin(absDelta), cosPhi0 * cosPhi1 + k * cos(absDelta)));
+             angle += antimeridian ? delta + sign * tau : delta; // Are the longitudes either side of the point’s meridian (lambda),
+             // and are the latitudes smaller than the parallel (phi)?

 
 

-       function selection_cloneShallow() {
-         var clone = this.cloneNode(false), parent = this.parentNode;
-         return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
-       }
+             if (antimeridian ^ lambda0 >= lambda ^ lambda1 >= lambda) {
+               var arc = cartesianCross(cartesian(point0), cartesian(point1));
+               cartesianNormalizeInPlace(arc);
+               var intersection = cartesianCross(normal, arc);
+               cartesianNormalizeInPlace(intersection);
+               var phiArc = (antimeridian ^ delta >= 0 ? -1 : 1) * asin(intersection[2]);

 
 

-       function selection_cloneDeep() {
-         var clone = this.cloneNode(true), parent = this.parentNode;
-         return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
-       }
+               if (phi > phiArc || phi === phiArc && (arc[0] || arc[1])) {
+                 winding += antimeridian ^ delta >= 0 ? 1 : -1;
+               }
+             }
+           }
+         } // First, determine whether the South pole is inside or outside:
+         //
+         // It is inside if:
+         // * the polygon winds around it in a clockwise direction.
+         // * the polygon does not (cumulatively) wind around it, but has a negative
+         //   (counter-clockwise) area.
+         //
+         // Second, count the (signed) number of times a segment crosses a lambda
+         // from the point to the South pole.  If it is zero, then the point is the
+         // same side as the South pole.

 
 

-       function selection_clone(deep) {
-         return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
-       }

 
 

-       function selection_datum(value) {
-         return arguments.length
-             ? this.property("__data__", value)
-             : this.node().__data__;
+         return (angle < -epsilon$1 || angle < epsilon$1 && sum < -epsilon2$1) ^ winding & 1;

        }
 
        }
 

-       var filterEvents = {};
+       function clip (pointVisible, clipLine, interpolate, start) {
+         return function (sink) {
+           var line = clipLine(sink),
+               ringBuffer = clipBuffer(),
+               ringSink = clipLine(ringBuffer),
+               polygonStarted = false,
+               polygon,
+               segments,
+               ring;
+           var clip = {
+             point: point,
+             lineStart: lineStart,
+             lineEnd: lineEnd,
+             polygonStart: function polygonStart() {
+               clip.point = pointRing;
+               clip.lineStart = ringStart;
+               clip.lineEnd = ringEnd;
+               segments = [];
+               polygon = [];
+             },
+             polygonEnd: function polygonEnd() {
+               clip.point = point;
+               clip.lineStart = lineStart;
+               clip.lineEnd = lineEnd;
+               segments = merge$4(segments);
+               var startInside = polygonContains(polygon, start);

 
 

-       var event = null;
+               if (segments.length) {
+                 if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+                 clipRejoin(segments, compareIntersection, startInside, interpolate, sink);
+               } else if (startInside) {
+                 if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+                 sink.lineStart();
+                 interpolate(null, null, 1, sink);
+                 sink.lineEnd();
+               }

 
 

-       if (typeof document !== "undefined") {
-         var element = document.documentElement;
-         if (!("onmouseenter" in element)) {
-           filterEvents = {mouseenter: "mouseover", mouseleave: "mouseout"};
-         }
-       }
+               if (polygonStarted) sink.polygonEnd(), polygonStarted = false;
+               segments = polygon = null;
+             },
+             sphere: function sphere() {
+               sink.polygonStart();
+               sink.lineStart();
+               interpolate(null, null, 1, sink);
+               sink.lineEnd();
+               sink.polygonEnd();
+             }
+           };

 
 

-       function filterContextListener(listener, index, group) {
-         listener = contextListener(listener, index, group);
-         return function(event) {
-           var related = event.relatedTarget;
-           if (!related || (related !== this && !(related.compareDocumentPosition(this) & 8))) {
-             listener.call(this, event);
+           function point(lambda, phi) {
+             if (pointVisible(lambda, phi)) sink.point(lambda, phi);

            }
            }

-         };
-       }

 
 

-       function contextListener(listener, index, group) {
-         return function(event1) {
-           var event0 = event; // Events can be reentrant (e.g., focus).
-           event = event1;
-           try {
-             listener.call(this, this.__data__, index, group);
-           } finally {
-             event = event0;
+           function pointLine(lambda, phi) {
+             line.point(lambda, phi);

            }
            }

-         };
-       }
-
-       function parseTypenames$1(typenames) {
-         return typenames.trim().split(/^|\s+/).map(function(t) {
-           var name = "", i = t.indexOf(".");
-           if (i >= 0) { name = t.slice(i + 1), t = t.slice(0, i); }
-           return {type: t, name: name};
-         });
-       }

 
 

-       function onRemove(typename) {
-         return function() {
-           var on = this.__on;
-           if (!on) { return; }
-           for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
-             if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
-               this.removeEventListener(o.type, o.listener, o.capture);
-             } else {
-               on[++i] = o;
-             }
+           function lineStart() {
+             clip.point = pointLine;
+             line.lineStart();

            }
            }

-           if (++i) { on.length = i; }
-           else { delete this.__on; }
-         };
-       }
-
-       function onAdd(typename, value, capture) {
-         var wrap = filterEvents.hasOwnProperty(typename.type) ? filterContextListener : contextListener;
-         return function(d, i, group) {
-           var on = this.__on, o, listener = wrap(value, i, group);
-           if (on) { for (var j = 0, m = on.length; j < m; ++j) {
-             if ((o = on[j]).type === typename.type && o.name === typename.name) {
-               this.removeEventListener(o.type, o.listener, o.capture);
-               this.addEventListener(o.type, o.listener = listener, o.capture = capture);
-               o.value = value;
-               return;
-             }
-           } }
-           this.addEventListener(typename.type, listener, capture);
-           o = {type: typename.type, name: typename.name, value: value, listener: listener, capture: capture};
-           if (!on) { this.__on = [o]; }
-           else { on.push(o); }
-         };
-       }
-
-       function selection_on(typename, value, capture) {
-         var typenames = parseTypenames$1(typename + ""), i, n = typenames.length, t;

 
 

-         if (arguments.length < 2) {
-           var on = this.node().__on;
-           if (on) { for (var j = 0, m = on.length, o; j < m; ++j) {
-             for (i = 0, o = on[j]; i < n; ++i) {
-               if ((t = typenames[i]).type === o.type && t.name === o.name) {
-                 return o.value;
-               }
-             }
-           } }
-           return;
-         }
+           function lineEnd() {
+             clip.point = point;
+             line.lineEnd();
+           }

 
 

-         on = value ? onAdd : onRemove;
-         if (capture == null) { capture = false; }
-         for (i = 0; i < n; ++i) { this.each(on(typenames[i], value, capture)); }
-         return this;
-       }
+           function pointRing(lambda, phi) {
+             ring.push([lambda, phi]);
+             ringSink.point(lambda, phi);
+           }

 
 

-       function customEvent(event1, listener, that, args) {
-         var event0 = event;
-         event1.sourceEvent = event;
-         event = event1;
-         try {
-           return listener.apply(that, args);
-         } finally {
-           event = event0;
-         }
-       }
+           function ringStart() {
+             ringSink.lineStart();
+             ring = [];
+           }

 
 

-       function dispatchEvent(node, type, params) {
-         var window = defaultView(node),
-             event = window.CustomEvent;
+           function ringEnd() {
+             pointRing(ring[0][0], ring[0][1]);
+             ringSink.lineEnd();
+             var clean = ringSink.clean(),
+                 ringSegments = ringBuffer.result(),
+                 i,
+                 n = ringSegments.length,
+                 m,
+                 segment,
+                 point;
+             ring.pop();
+             polygon.push(ring);
+             ring = null;
+             if (!n) return; // No intersections.

 
 

-         if (typeof event === "function") {
-           event = new event(type, params);
-         } else {
-           event = window.document.createEvent("Event");
-           if (params) { event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail; }
-           else { event.initEvent(type, false, false); }
-         }
+             if (clean & 1) {
+               segment = ringSegments[0];

 
 

-         node.dispatchEvent(event);
-       }
+               if ((m = segment.length - 1) > 0) {
+                 if (!polygonStarted) sink.polygonStart(), polygonStarted = true;
+                 sink.lineStart();

 
 

-       function dispatchConstant(type, params) {
-         return function() {
-           return dispatchEvent(this, type, params);
-         };
-       }
+                 for (i = 0; i < m; ++i) {
+                   sink.point((point = segment[i])[0], point[1]);
+                 }

 
 

-       function dispatchFunction(type, params) {
-         return function() {
-           return dispatchEvent(this, type, params.apply(this, arguments));
-         };
-       }
+                 sink.lineEnd();
+               }

 
 

-       function selection_dispatch(type, params) {
-         return this.each((typeof params === "function"
-             ? dispatchFunction
-             : dispatchConstant)(type, params));
-       }
+               return;
+             } // Rejoin connected segments.
+             // TODO reuse ringBuffer.rejoin()?

 
 

-       var root$1 = [null];

 
 

-       function Selection(groups, parents) {
-         this._groups = groups;
-         this._parents = parents;
-       }
+             if (n > 1 && clean & 2) ringSegments.push(ringSegments.pop().concat(ringSegments.shift()));
+             segments.push(ringSegments.filter(validSegment));
+           }

 
 

-       function selection() {
-         return new Selection([[document.documentElement]], root$1);
+           return clip;
+         };

        }
 
        }
 

-       Selection.prototype = selection.prototype = {
-         constructor: Selection,
-         select: selection_select,
-         selectAll: selection_selectAll,
-         filter: selection_filter,
-         data: selection_data,
-         enter: selection_enter,
-         exit: selection_exit,
-         join: selection_join,
-         merge: selection_merge,
-         order: selection_order,
-         sort: selection_sort,
-         call: selection_call,
-         nodes: selection_nodes,
-         node: selection_node,
-         size: selection_size,
-         empty: selection_empty,
-         each: selection_each,
-         attr: selection_attr,
-         style: selection_style,
-         property: selection_property,
-         classed: selection_classed,
-         text: selection_text,
-         html: selection_html,
-         raise: selection_raise,
-         lower: selection_lower,
-         append: selection_append,
-         insert: selection_insert,
-         remove: selection_remove,
-         clone: selection_clone,
-         datum: selection_datum,
-         on: selection_on,
-         dispatch: selection_dispatch
-       };
+       function validSegment(segment) {
+         return segment.length > 1;
+       } // Intersections are sorted along the clip edge. For both antimeridian cutting
+       // and circle clipping, the same comparison is used.

 
 

-       function select(selector) {
-         return typeof selector === "string"
-             ? new Selection([[document.querySelector(selector)]], [document.documentElement])
-             : new Selection([[selector]], root$1);
-       }

 
 

-       function sourceEvent() {
-         var current = event, source;
-         while (source = current.sourceEvent) { current = source; }
-         return current;
+       function compareIntersection(a, b) {
+         return ((a = a.x)[0] < 0 ? a[1] - halfPi - epsilon$1 : halfPi - a[1]) - ((b = b.x)[0] < 0 ? b[1] - halfPi - epsilon$1 : halfPi - b[1]);

        }
 
        }
 

-       function point(node, event) {
-         var svg = node.ownerSVGElement || node;
+       var clipAntimeridian = clip(function () {
+         return true;
+       }, clipAntimeridianLine, clipAntimeridianInterpolate, [-pi, -halfPi]); // Takes a line and cuts into visible segments. Return values: 0 - there were
+       // intersections or the line was empty; 1 - no intersections; 2 - there were
+       // intersections, and the first and last segments should be rejoined.

 
 

-         if (svg.createSVGPoint) {
-           var point = svg.createSVGPoint();
-           point.x = event.clientX, point.y = event.clientY;
-           point = point.matrixTransform(node.getScreenCTM().inverse());
-           return [point.x, point.y];
-         }
+       function clipAntimeridianLine(stream) {
+         var lambda0 = NaN,
+             phi0 = NaN,
+             sign0 = NaN,
+             _clean; // no intersections

 
 

-         var rect = node.getBoundingClientRect();
-         return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
-       }

 
 

-       function mouse(node) {
-         var event = sourceEvent();
-         if (event.changedTouches) { event = event.changedTouches[0]; }
-         return point(node, event);
-       }
+         return {
+           lineStart: function lineStart() {
+             stream.lineStart();
+             _clean = 1;
+           },
+           point: function point(lambda1, phi1) {
+             var sign1 = lambda1 > 0 ? pi : -pi,
+                 delta = abs$2(lambda1 - lambda0);

 
 

-       function selectAll(selector) {
-         return typeof selector === "string"
-             ? new Selection([document.querySelectorAll(selector)], [document.documentElement])
-             : new Selection([selector == null ? [] : selector], root$1);
-       }
+             if (abs$2(delta - pi) < epsilon$1) {
+               // line crosses a pole
+               stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi : -halfPi);
+               stream.point(sign0, phi0);
+               stream.lineEnd();
+               stream.lineStart();
+               stream.point(sign1, phi0);
+               stream.point(lambda1, phi0);
+               _clean = 0;
+             } else if (sign0 !== sign1 && delta >= pi) {
+               // line crosses antimeridian
+               if (abs$2(lambda0 - sign0) < epsilon$1) lambda0 -= sign0 * epsilon$1; // handle degeneracies

 
 

-       function touch(node, touches, identifier) {
-         if (arguments.length < 3) { identifier = touches, touches = sourceEvent().changedTouches; }
+               if (abs$2(lambda1 - sign1) < epsilon$1) lambda1 -= sign1 * epsilon$1;
+               phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
+               stream.point(sign0, phi0);
+               stream.lineEnd();
+               stream.lineStart();
+               stream.point(sign1, phi0);
+               _clean = 0;
+             }

 
 

-         for (var i = 0, n = touches ? touches.length : 0, touch; i < n; ++i) {
-           if ((touch = touches[i]).identifier === identifier) {
-             return point(node, touch);
+             stream.point(lambda0 = lambda1, phi0 = phi1);
+             sign0 = sign1;
+           },
+           lineEnd: function lineEnd() {
+             stream.lineEnd();
+             lambda0 = phi0 = NaN;
+           },
+           clean: function clean() {
+             return 2 - _clean; // if intersections, rejoin first and last segments

            }
            }

-         }
-
-         return null;
-       }
-
-       function nopropagation() {
-         event.stopImmediatePropagation();
+         };

        }
 
        }
 

-       function noevent() {
-         event.preventDefault();
-         event.stopImmediatePropagation();
+       function clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1) {
+         var cosPhi0,
+             cosPhi1,
+             sinLambda0Lambda1 = sin(lambda0 - lambda1);
+         return abs$2(sinLambda0Lambda1) > epsilon$1 ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1) - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0)) / (cosPhi0 * cosPhi1 * sinLambda0Lambda1)) : (phi0 + phi1) / 2;

        }
 
        }
 

-       function dragDisable(view) {
-         var root = view.document.documentElement,
-             selection = select(view).on("dragstart.drag", noevent, true);
-         if ("onselectstart" in root) {
-           selection.on("selectstart.drag", noevent, true);
-         } else {
-           root.__noselect = root.style.MozUserSelect;
-           root.style.MozUserSelect = "none";
-         }
-       }
+       function clipAntimeridianInterpolate(from, to, direction, stream) {
+         var phi;

 
 

-       function yesdrag(view, noclick) {
-         var root = view.document.documentElement,
-             selection = select(view).on("dragstart.drag", null);
-         if (noclick) {
-           selection.on("click.drag", noevent, true);
-           setTimeout(function() { selection.on("click.drag", null); }, 0);
-         }
-         if ("onselectstart" in root) {
-           selection.on("selectstart.drag", null);
+         if (from == null) {
+           phi = direction * halfPi;
+           stream.point(-pi, phi);
+           stream.point(0, phi);
+           stream.point(pi, phi);
+           stream.point(pi, 0);
+           stream.point(pi, -phi);
+           stream.point(0, -phi);
+           stream.point(-pi, -phi);
+           stream.point(-pi, 0);
+           stream.point(-pi, phi);
+         } else if (abs$2(from[0] - to[0]) > epsilon$1) {
+           var lambda = from[0] < to[0] ? pi : -pi;
+           phi = direction * lambda / 2;
+           stream.point(-lambda, phi);
+           stream.point(0, phi);
+           stream.point(lambda, phi);

          } else {
          } else {

-           root.style.MozUserSelect = root.__noselect;
-           delete root.__noselect;
+           stream.point(to[0], to[1]);

          }
        }
 
          }
        }
 

-       function constant$1(x) {
-         return function() {
-           return x;
-         };
-       }
+       function clipCircle (radius) {
+         var cr = cos(radius),
+             delta = 6 * radians,
+             smallRadius = cr > 0,
+             notHemisphere = abs$2(cr) > epsilon$1; // TODO optimise for this common case

 
 

-       function DragEvent(target, type, subject, id, active, x, y, dx, dy, dispatch) {
-         this.target = target;
-         this.type = type;
-         this.subject = subject;
-         this.identifier = id;
-         this.active = active;
-         this.x = x;
-         this.y = y;
-         this.dx = dx;
-         this.dy = dy;
-         this._ = dispatch;
-       }
+         function interpolate(from, to, direction, stream) {
+           circleStream(stream, radius, delta, direction, from, to);
+         }

 
 

-       DragEvent.prototype.on = function() {
-         var value = this._.on.apply(this._, arguments);
-         return value === this._ ? this : value;
-       };
+         function visible(lambda, phi) {
+           return cos(lambda) * cos(phi) > cr;
+         } // Takes a line and cuts into visible segments. Return values used for polygon
+         // clipping: 0 - there were intersections or the line was empty; 1 - no
+         // intersections 2 - there were intersections, and the first and last segments
+         // should be rejoined.

 
 

-       // Ignore right-click, since that should open the context menu.
-       function defaultFilter() {
-         return !event.ctrlKey && !event.button;
-       }

 
 

-       function defaultContainer() {
-         return this.parentNode;
-       }
+         function clipLine(stream) {
+           var point0, // previous point
+           c0, // code for previous point
+           v0, // visibility of previous point
+           v00, // visibility of first point
+           _clean; // no intersections

 
 

-       function defaultSubject(d) {
-         return d == null ? {x: event.x, y: event.y} : d;
-       }

 
 

-       function defaultTouchable() {
-         return navigator.maxTouchPoints || ("ontouchstart" in this);
+           return {
+             lineStart: function lineStart() {
+               v00 = v0 = false;
+               _clean = 1;
+             },
+             point: function point(lambda, phi) {
+               var point1 = [lambda, phi],
+                   point2,
+                   v = visible(lambda, phi),
+                   c = smallRadius ? v ? 0 : code(lambda, phi) : v ? code(lambda + (lambda < 0 ? pi : -pi), phi) : 0;
+               if (!point0 && (v00 = v0 = v)) stream.lineStart();
+
+               if (v !== v0) {
+                 point2 = intersect(point0, point1);
+                 if (!point2 || pointEqual(point0, point2) || pointEqual(point1, point2)) point1[2] = 1;
+               }
+
+               if (v !== v0) {
+                 _clean = 0;
+
+                 if (v) {
+                   // outside going in
+                   stream.lineStart();
+                   point2 = intersect(point1, point0);
+                   stream.point(point2[0], point2[1]);
+                 } else {
+                   // inside going out
+                   point2 = intersect(point0, point1);
+                   stream.point(point2[0], point2[1], 2);
+                   stream.lineEnd();
+                 }
+
+                 point0 = point2;
+               } else if (notHemisphere && point0 && smallRadius ^ v) {
+                 var t; // If the codes for two points are different, or are both zero,
+                 // and there this segment intersects with the small circle.
+
+                 if (!(c & c0) && (t = intersect(point1, point0, true))) {
+                   _clean = 0;
+
+                   if (smallRadius) {
+                     stream.lineStart();
+                     stream.point(t[0][0], t[0][1]);
+                     stream.point(t[1][0], t[1][1]);
+                     stream.lineEnd();
+                   } else {
+                     stream.point(t[1][0], t[1][1]);
+                     stream.lineEnd();
+                     stream.lineStart();
+                     stream.point(t[0][0], t[0][1], 3);
+                   }
+                 }
+               }
+
+               if (v && (!point0 || !pointEqual(point0, point1))) {
+                 stream.point(point1[0], point1[1]);
+               }
+
+               point0 = point1, v0 = v, c0 = c;
+             },
+             lineEnd: function lineEnd() {
+               if (v0) stream.lineEnd();
+               point0 = null;
+             },
+             // Rejoin first and last segments if there were intersections and the first
+             // and last points were visible.
+             clean: function clean() {
+               return _clean | (v00 && v0) << 1;
+             }
+           };
+         } // Intersects the great circle between a and b with the clip circle.
+
+
+         function intersect(a, b, two) {
+           var pa = cartesian(a),
+               pb = cartesian(b); // We have two planes, n1.p = d1 and n2.p = d2.
+           // Find intersection line p(t) = c1 n1 + c2 n2 + t (n1 ⨯ n2).
+
+           var n1 = [1, 0, 0],
+               // normal
+           n2 = cartesianCross(pa, pb),
+               n2n2 = cartesianDot(n2, n2),
+               n1n2 = n2[0],
+               // cartesianDot(n1, n2),
+           determinant = n2n2 - n1n2 * n1n2; // Two polar points.
+
+           if (!determinant) return !two && a;
+           var c1 = cr * n2n2 / determinant,
+               c2 = -cr * n1n2 / determinant,
+               n1xn2 = cartesianCross(n1, n2),
+               A = cartesianScale(n1, c1),
+               B = cartesianScale(n2, c2);
+           cartesianAddInPlace(A, B); // Solve |p(t)|^2 = 1.
+
+           var u = n1xn2,
+               w = cartesianDot(A, u),
+               uu = cartesianDot(u, u),
+               t2 = w * w - uu * (cartesianDot(A, A) - 1);
+           if (t2 < 0) return;
+           var t = sqrt(t2),
+               q = cartesianScale(u, (-w - t) / uu);
+           cartesianAddInPlace(q, A);
+           q = spherical(q);
+           if (!two) return q; // Two intersection points.
+
+           var lambda0 = a[0],
+               lambda1 = b[0],
+               phi0 = a[1],
+               phi1 = b[1],
+               z;
+           if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;
+           var delta = lambda1 - lambda0,
+               polar = abs$2(delta - pi) < epsilon$1,
+               meridian = polar || delta < epsilon$1;
+           if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z; // Check that the first point is between a and b.
+
+           if (meridian ? polar ? phi0 + phi1 > 0 ^ q[1] < (abs$2(q[0] - lambda0) < epsilon$1 ? phi0 : phi1) : phi0 <= q[1] && q[1] <= phi1 : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
+             var q1 = cartesianScale(u, (-w + t) / uu);
+             cartesianAddInPlace(q1, A);
+             return [q, spherical(q1)];
+           }
+         } // Generates a 4-bit vector representing the location of a point relative to
+         // the small circle's bounding box.
+
+
+         function code(lambda, phi) {
+           var r = smallRadius ? radius : pi - radius,
+               code = 0;
+           if (lambda < -r) code |= 1; // left
+           else if (lambda > r) code |= 2; // right
+
+           if (phi < -r) code |= 4; // below
+           else if (phi > r) code |= 8; // above
+
+           return code;
+         }
+
+         return clip(visible, clipLine, interpolate, smallRadius ? [0, -radius] : [-pi, radius - pi]);

        }
 
        }
 

-       function d3_drag() {
-         var filter = defaultFilter,
-             container = defaultContainer,
-             subject = defaultSubject,
-             touchable = defaultTouchable,
-             gestures = {},
-             listeners = dispatch("start", "drag", "end"),
-             active = 0,
-             mousedownx,
-             mousedowny,
-             mousemoving,
-             touchending,
-             clickDistance2 = 0;
+       function clipLine (a, b, x0, y0, x1, y1) {
+         var ax = a[0],
+             ay = a[1],
+             bx = b[0],
+             by = b[1],
+             t0 = 0,
+             t1 = 1,
+             dx = bx - ax,
+             dy = by - ay,
+             r;
+         r = x0 - ax;
+         if (!dx && r > 0) return;
+         r /= dx;

 
 

-         function drag(selection) {
-           selection
-               .on("mousedown.drag", mousedowned)
-             .filter(touchable)
-               .on("touchstart.drag", touchstarted)
-               .on("touchmove.drag", touchmoved)
-               .on("touchend.drag touchcancel.drag", touchended)
-               .style("touch-action", "none")
-               .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
-         }
-
-         function mousedowned() {
-           if (touchending || !filter.apply(this, arguments)) { return; }
-           var gesture = beforestart("mouse", container.apply(this, arguments), mouse, this, arguments);
-           if (!gesture) { return; }
-           select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
-           dragDisable(event.view);
-           nopropagation();
-           mousemoving = false;
-           mousedownx = event.clientX;
-           mousedowny = event.clientY;
-           gesture("start");
+         if (dx < 0) {
+           if (r < t0) return;
+           if (r < t1) t1 = r;
+         } else if (dx > 0) {
+           if (r > t1) return;
+           if (r > t0) t0 = r;

          }
 
          }
 

-         function mousemoved() {
-           noevent();
-           if (!mousemoving) {
-             var dx = event.clientX - mousedownx, dy = event.clientY - mousedowny;
-             mousemoving = dx * dx + dy * dy > clickDistance2;
-           }
-           gestures.mouse("drag");
+         r = x1 - ax;
+         if (!dx && r < 0) return;
+         r /= dx;
+
+         if (dx < 0) {
+           if (r > t1) return;
+           if (r > t0) t0 = r;
+         } else if (dx > 0) {
+           if (r < t0) return;
+           if (r < t1) t1 = r;

          }
 
          }
 

-         function mouseupped() {
-           select(event.view).on("mousemove.drag mouseup.drag", null);
-           yesdrag(event.view, mousemoving);
-           noevent();
-           gestures.mouse("end");
+         r = y0 - ay;
+         if (!dy && r > 0) return;
+         r /= dy;
+
+         if (dy < 0) {
+           if (r < t0) return;
+           if (r < t1) t1 = r;
+         } else if (dy > 0) {
+           if (r > t1) return;
+           if (r > t0) t0 = r;

          }
 
          }
 

-         function touchstarted() {
-           var arguments$1 = arguments;
+         r = y1 - ay;
+         if (!dy && r < 0) return;
+         r /= dy;

 
 

-           if (!filter.apply(this, arguments)) { return; }
-           var touches = event.changedTouches,
-               c = container.apply(this, arguments),
-               n = touches.length, i, gesture;
+         if (dy < 0) {
+           if (r > t1) return;
+           if (r > t0) t0 = r;
+         } else if (dy > 0) {
+           if (r < t0) return;
+           if (r < t1) t1 = r;
+         }

 
 

-           for (i = 0; i < n; ++i) {
-             if (gesture = beforestart(touches[i].identifier, c, touch, this, arguments$1)) {
-               nopropagation();
-               gesture("start");
-             }
-           }
+         if (t0 > 0) a[0] = ax + t0 * dx, a[1] = ay + t0 * dy;
+         if (t1 < 1) b[0] = ax + t1 * dx, b[1] = ay + t1 * dy;
+         return true;
+       }
+
+       var clipMax = 1e9,
+           clipMin = -clipMax; // TODO Use d3-polygon’s polygonContains here for the ring check?
+       // TODO Eliminate duplicate buffering in clipBuffer and polygon.push?
+
+       function clipRectangle(x0, y0, x1, y1) {
+         function visible(x, y) {
+           return x0 <= x && x <= x1 && y0 <= y && y <= y1;

          }
 
          }
 

-         function touchmoved() {
-           var touches = event.changedTouches,
-               n = touches.length, i, gesture;
+         function interpolate(from, to, direction, stream) {
+           var a = 0,
+               a1 = 0;

 
 

-           for (i = 0; i < n; ++i) {
-             if (gesture = gestures[touches[i].identifier]) {
-               noevent();
-               gesture("drag");
-             }
+           if (from == null || (a = corner(from, direction)) !== (a1 = corner(to, direction)) || comparePoint(from, to) < 0 ^ direction > 0) {
+             do {
+               stream.point(a === 0 || a === 3 ? x0 : x1, a > 1 ? y1 : y0);
+             } while ((a = (a + direction + 4) % 4) !== a1);
+           } else {
+             stream.point(to[0], to[1]);

            }
          }
 
            }
          }
 

-         function touchended() {
-           var touches = event.changedTouches,
-               n = touches.length, i, gesture;
+         function corner(p, direction) {
+           return abs$2(p[0] - x0) < epsilon$1 ? direction > 0 ? 0 : 3 : abs$2(p[0] - x1) < epsilon$1 ? direction > 0 ? 2 : 1 : abs$2(p[1] - y0) < epsilon$1 ? direction > 0 ? 1 : 0 : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
+         }

 
 

-           if (touchending) { clearTimeout(touchending); }
-           touchending = setTimeout(function() { touchending = null; }, 500); // Ghost clicks are delayed!
-           for (i = 0; i < n; ++i) {
-             if (gesture = gestures[touches[i].identifier]) {
-               nopropagation();
-               gesture("end");
-             }
-           }
+         function compareIntersection(a, b) {
+           return comparePoint(a.x, b.x);

          }
 
          }
 

-         function beforestart(id, container, point, that, args) {
-           var p = point(container, id), s, dx, dy,
-               sublisteners = listeners.copy();
+         function comparePoint(a, b) {
+           var ca = corner(a, 1),
+               cb = corner(b, 1);
+           return ca !== cb ? ca - cb : ca === 0 ? b[1] - a[1] : ca === 1 ? a[0] - b[0] : ca === 2 ? a[1] - b[1] : b[0] - a[0];
+         }

 
 

-           if (!customEvent(new DragEvent(drag, "beforestart", s, id, active, p[0], p[1], 0, 0, sublisteners), function() {
-             if ((event.subject = s = subject.apply(that, args)) == null) { return false; }
-             dx = s.x - p[0] || 0;
-             dy = s.y - p[1] || 0;
-             return true;
-           })) { return; }
+         return function (stream) {
+           var activeStream = stream,
+               bufferStream = clipBuffer(),
+               segments,
+               polygon,
+               ring,
+               x__,
+               y__,
+               v__,
+               // first point
+           x_,
+               y_,
+               v_,
+               // previous point
+           first,
+               clean;
+           var clipStream = {
+             point: point,
+             lineStart: lineStart,
+             lineEnd: lineEnd,
+             polygonStart: polygonStart,
+             polygonEnd: polygonEnd
+           };

 
 

-           return function gesture(type) {
-             var p0 = p, n;
-             switch (type) {
-               case "start": gestures[id] = gesture, n = active++; break;
-               case "end": delete gestures[id], --active; // nobreak
-               case "drag": p = point(container, id), n = active; break;
+           function point(x, y) {
+             if (visible(x, y)) activeStream.point(x, y);
+           }
+
+           function polygonInside() {
+             var winding = 0;
+
+             for (var i = 0, n = polygon.length; i < n; ++i) {
+               for (var ring = polygon[i], j = 1, m = ring.length, point = ring[0], a0, a1, b0 = point[0], b1 = point[1]; j < m; ++j) {
+                 a0 = b0, a1 = b1, point = ring[j], b0 = point[0], b1 = point[1];
+
+                 if (a1 <= y1) {
+                   if (b1 > y1 && (b0 - a0) * (y1 - a1) > (b1 - a1) * (x0 - a0)) ++winding;
+                 } else {
+                   if (b1 <= y1 && (b0 - a0) * (y1 - a1) < (b1 - a1) * (x0 - a0)) --winding;
+                 }
+               }

              }
              }

-             customEvent(new DragEvent(drag, type, s, id, n, p[0] + dx, p[1] + dy, p[0] - p0[0], p[1] - p0[1], sublisteners), sublisteners.apply, sublisteners, [type, that, args]);
-           };
-         }

 
 

-         drag.filter = function(_) {
-           return arguments.length ? (filter = typeof _ === "function" ? _ : constant$1(!!_), drag) : filter;
-         };
+             return winding;
+           } // Buffer geometry within a polygon and then clip it en masse.

 
 

-         drag.container = function(_) {
-           return arguments.length ? (container = typeof _ === "function" ? _ : constant$1(_), drag) : container;
-         };

 
 

-         drag.subject = function(_) {
-           return arguments.length ? (subject = typeof _ === "function" ? _ : constant$1(_), drag) : subject;
-         };
+           function polygonStart() {
+             activeStream = bufferStream, segments = [], polygon = [], clean = true;
+           }

 
 

-         drag.touchable = function(_) {
-           return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$1(!!_), drag) : touchable;
-         };
+           function polygonEnd() {
+             var startInside = polygonInside(),
+                 cleanInside = clean && startInside,
+                 visible = (segments = merge$4(segments)).length;

 
 

-         drag.on = function() {
-           var value = listeners.on.apply(listeners, arguments);
-           return value === listeners ? drag : value;
-         };
+             if (cleanInside || visible) {
+               stream.polygonStart();

 
 

-         drag.clickDistance = function(_) {
-           return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
-         };
+               if (cleanInside) {
+                 stream.lineStart();
+                 interpolate(null, null, 1, stream);
+                 stream.lineEnd();
+               }

 
 

-         return drag;
-       }
+               if (visible) {
+                 clipRejoin(segments, compareIntersection, startInside, interpolate, stream);
+               }

 
 

-       function define$1(constructor, factory, prototype) {
-         constructor.prototype = factory.prototype = prototype;
-         prototype.constructor = constructor;
-       }
+               stream.polygonEnd();
+             }

 
 

-       function extend(parent, definition) {
-         var prototype = Object.create(parent.prototype);
-         for (var key in definition) { prototype[key] = definition[key]; }
-         return prototype;
-       }
+             activeStream = stream, segments = polygon = ring = null;
+           }

 
 

-       function Color() {}
+           function lineStart() {
+             clipStream.point = linePoint;
+             if (polygon) polygon.push(ring = []);
+             first = true;
+             v_ = false;
+             x_ = y_ = NaN;
+           } // TODO rather than special-case polygons, simply handle them separately.
+           // Ideally, coincident intersection points should be jittered to avoid
+           // clipping issues.

 
 

-       var darker = 0.7;
-       var brighter = 1 / darker;

 
 

-       var reI = "\\s*([+-]?\\d+)\\s*",
-           reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
-           reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
-           reHex = /^#([0-9a-f]{3,8})$/,
-           reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
-           reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
-           reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
-           reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"),
-           reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"),
-           reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
+           function lineEnd() {
+             if (segments) {
+               linePoint(x__, y__);
+               if (v__ && v_) bufferStream.rejoin();
+               segments.push(bufferStream.result());
+             }

 
 

-       var named = {
-         aliceblue: 0xf0f8ff,
-         antiquewhite: 0xfaebd7,
-         aqua: 0x00ffff,
-         aquamarine: 0x7fffd4,
-         azure: 0xf0ffff,
-         beige: 0xf5f5dc,
-         bisque: 0xffe4c4,
-         black: 0x000000,
-         blanchedalmond: 0xffebcd,
-         blue: 0x0000ff,
-         blueviolet: 0x8a2be2,
-         brown: 0xa52a2a,
-         burlywood: 0xdeb887,
-         cadetblue: 0x5f9ea0,
-         chartreuse: 0x7fff00,
-         chocolate: 0xd2691e,
-         coral: 0xff7f50,
-         cornflowerblue: 0x6495ed,
-         cornsilk: 0xfff8dc,
-         crimson: 0xdc143c,
-         cyan: 0x00ffff,
-         darkblue: 0x00008b,
-         darkcyan: 0x008b8b,
-         darkgoldenrod: 0xb8860b,
-         darkgray: 0xa9a9a9,
-         darkgreen: 0x006400,
-         darkgrey: 0xa9a9a9,
-         darkkhaki: 0xbdb76b,
-         darkmagenta: 0x8b008b,
-         darkolivegreen: 0x556b2f,
-         darkorange: 0xff8c00,
-         darkorchid: 0x9932cc,
-         darkred: 0x8b0000,
-         darksalmon: 0xe9967a,
-         darkseagreen: 0x8fbc8f,
-         darkslateblue: 0x483d8b,
-         darkslategray: 0x2f4f4f,
-         darkslategrey: 0x2f4f4f,
-         darkturquoise: 0x00ced1,
-         darkviolet: 0x9400d3,
-         deeppink: 0xff1493,
-         deepskyblue: 0x00bfff,
-         dimgray: 0x696969,
-         dimgrey: 0x696969,
-         dodgerblue: 0x1e90ff,
-         firebrick: 0xb22222,
-         floralwhite: 0xfffaf0,
-         forestgreen: 0x228b22,
-         fuchsia: 0xff00ff,
-         gainsboro: 0xdcdcdc,
-         ghostwhite: 0xf8f8ff,
-         gold: 0xffd700,
-         goldenrod: 0xdaa520,
-         gray: 0x808080,
-         green: 0x008000,
-         greenyellow: 0xadff2f,
-         grey: 0x808080,
-         honeydew: 0xf0fff0,
-         hotpink: 0xff69b4,
-         indianred: 0xcd5c5c,
-         indigo: 0x4b0082,
-         ivory: 0xfffff0,
-         khaki: 0xf0e68c,
-         lavender: 0xe6e6fa,
-         lavenderblush: 0xfff0f5,
-         lawngreen: 0x7cfc00,
-         lemonchiffon: 0xfffacd,
-         lightblue: 0xadd8e6,
-         lightcoral: 0xf08080,
-         lightcyan: 0xe0ffff,
-         lightgoldenrodyellow: 0xfafad2,
-         lightgray: 0xd3d3d3,
-         lightgreen: 0x90ee90,
-         lightgrey: 0xd3d3d3,
-         lightpink: 0xffb6c1,
-         lightsalmon: 0xffa07a,
-         lightseagreen: 0x20b2aa,
-         lightskyblue: 0x87cefa,
-         lightslategray: 0x778899,
-         lightslategrey: 0x778899,
-         lightsteelblue: 0xb0c4de,
-         lightyellow: 0xffffe0,
-         lime: 0x00ff00,
-         limegreen: 0x32cd32,
-         linen: 0xfaf0e6,
-         magenta: 0xff00ff,
-         maroon: 0x800000,
-         mediumaquamarine: 0x66cdaa,
-         mediumblue: 0x0000cd,
-         mediumorchid: 0xba55d3,
-         mediumpurple: 0x9370db,
-         mediumseagreen: 0x3cb371,
-         mediumslateblue: 0x7b68ee,
-         mediumspringgreen: 0x00fa9a,
-         mediumturquoise: 0x48d1cc,
-         mediumvioletred: 0xc71585,
-         midnightblue: 0x191970,
-         mintcream: 0xf5fffa,
-         mistyrose: 0xffe4e1,
-         moccasin: 0xffe4b5,
-         navajowhite: 0xffdead,
-         navy: 0x000080,
-         oldlace: 0xfdf5e6,
-         olive: 0x808000,
-         olivedrab: 0x6b8e23,
-         orange: 0xffa500,
-         orangered: 0xff4500,
-         orchid: 0xda70d6,
-         palegoldenrod: 0xeee8aa,
-         palegreen: 0x98fb98,
-         paleturquoise: 0xafeeee,
-         palevioletred: 0xdb7093,
-         papayawhip: 0xffefd5,
-         peachpuff: 0xffdab9,
-         peru: 0xcd853f,
-         pink: 0xffc0cb,
-         plum: 0xdda0dd,
-         powderblue: 0xb0e0e6,
-         purple: 0x800080,
-         rebeccapurple: 0x663399,
-         red: 0xff0000,
-         rosybrown: 0xbc8f8f,
-         royalblue: 0x4169e1,
-         saddlebrown: 0x8b4513,
-         salmon: 0xfa8072,
-         sandybrown: 0xf4a460,
-         seagreen: 0x2e8b57,
-         seashell: 0xfff5ee,
-         sienna: 0xa0522d,
-         silver: 0xc0c0c0,
-         skyblue: 0x87ceeb,
-         slateblue: 0x6a5acd,
-         slategray: 0x708090,
-         slategrey: 0x708090,
-         snow: 0xfffafa,
-         springgreen: 0x00ff7f,
-         steelblue: 0x4682b4,
-         tan: 0xd2b48c,
-         teal: 0x008080,
-         thistle: 0xd8bfd8,
-         tomato: 0xff6347,
-         turquoise: 0x40e0d0,
-         violet: 0xee82ee,
-         wheat: 0xf5deb3,
-         white: 0xffffff,
-         whitesmoke: 0xf5f5f5,
-         yellow: 0xffff00,
-         yellowgreen: 0x9acd32
-       };
+             clipStream.point = point;
+             if (v_) activeStream.lineEnd();
+           }

 
 

-       define$1(Color, color, {
-         copy: function(channels) {
-           return Object.assign(new this.constructor, this, channels);
-         },
-         displayable: function() {
-           return this.rgb().displayable();
-         },
-         hex: color_formatHex, // Deprecated! Use color.formatHex.
-         formatHex: color_formatHex,
-         formatHsl: color_formatHsl,
-         formatRgb: color_formatRgb,
-         toString: color_formatRgb
-       });
+           function linePoint(x, y) {
+             var v = visible(x, y);
+             if (polygon) ring.push([x, y]);

 
 

-       function color_formatHex() {
-         return this.rgb().formatHex();
-       }
+             if (first) {
+               x__ = x, y__ = y, v__ = v;
+               first = false;

 
 

-       function color_formatHsl() {
-         return hslConvert(this).formatHsl();
-       }
+               if (v) {
+                 activeStream.lineStart();
+                 activeStream.point(x, y);
+               }
+             } else {
+               if (v && v_) activeStream.point(x, y);else {
+                 var a = [x_ = Math.max(clipMin, Math.min(clipMax, x_)), y_ = Math.max(clipMin, Math.min(clipMax, y_))],
+                     b = [x = Math.max(clipMin, Math.min(clipMax, x)), y = Math.max(clipMin, Math.min(clipMax, y))];

 
 

-       function color_formatRgb() {
-         return this.rgb().formatRgb();
-       }
+                 if (clipLine(a, b, x0, y0, x1, y1)) {
+                   if (!v_) {
+                     activeStream.lineStart();
+                     activeStream.point(a[0], a[1]);
+                   }

 
 

-       function color(format) {
-         var m, l;
-         format = (format + "").trim().toLowerCase();
-         return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000
-             : l === 3 ? new Rgb((m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), ((m & 0xf) << 4) | (m & 0xf), 1) // #f00
-             : l === 8 ? rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000
-             : l === 4 ? rgba((m >> 12 & 0xf) | (m >> 8 & 0xf0), (m >> 8 & 0xf) | (m >> 4 & 0xf0), (m >> 4 & 0xf) | (m & 0xf0), (((m & 0xf) << 4) | (m & 0xf)) / 0xff) // #f000
-             : null) // invalid hex
-             : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
-             : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
-             : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
-             : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
-             : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
-             : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
-             : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins
-             : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0)
-             : null;
+                   activeStream.point(b[0], b[1]);
+                   if (!v) activeStream.lineEnd();
+                   clean = false;
+                 } else if (v) {
+                   activeStream.lineStart();
+                   activeStream.point(x, y);
+                   clean = false;
+                 }
+               }
+             }
+
+             x_ = x, y_ = y, v_ = v;
+           }
+
+           return clipStream;
+         };

        }
 
        }
 

-       function rgbn(n) {
-         return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
+       var lengthSum$1, lambda0, sinPhi0, cosPhi0;
+       var lengthStream$1 = {
+         sphere: noop$1,
+         point: noop$1,
+         lineStart: lengthLineStart,
+         lineEnd: noop$1,
+         polygonStart: noop$1,
+         polygonEnd: noop$1
+       };
+
+       function lengthLineStart() {
+         lengthStream$1.point = lengthPointFirst$1;
+         lengthStream$1.lineEnd = lengthLineEnd;

        }
 
        }
 

-       function rgba(r, g, b, a) {
-         if (a <= 0) { r = g = b = NaN; }
-         return new Rgb(r, g, b, a);
+       function lengthLineEnd() {
+         lengthStream$1.point = lengthStream$1.lineEnd = noop$1;

        }
 
        }
 

-       function rgbConvert(o) {
-         if (!(o instanceof Color)) { o = color(o); }
-         if (!o) { return new Rgb; }
-         o = o.rgb();
-         return new Rgb(o.r, o.g, o.b, o.opacity);
+       function lengthPointFirst$1(lambda, phi) {
+         lambda *= radians, phi *= radians;
+         lambda0 = lambda, sinPhi0 = sin(phi), cosPhi0 = cos(phi);
+         lengthStream$1.point = lengthPoint$1;

        }
 
        }
 

-       function rgb(r, g, b, opacity) {
-         return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
+       function lengthPoint$1(lambda, phi) {
+         lambda *= radians, phi *= radians;
+         var sinPhi = sin(phi),
+             cosPhi = cos(phi),
+             delta = abs$2(lambda - lambda0),
+             cosDelta = cos(delta),
+             sinDelta = sin(delta),
+             x = cosPhi * sinDelta,
+             y = cosPhi0 * sinPhi - sinPhi0 * cosPhi * cosDelta,
+             z = sinPhi0 * sinPhi + cosPhi0 * cosPhi * cosDelta;
+         lengthSum$1.add(atan2(sqrt(x * x + y * y), z));
+         lambda0 = lambda, sinPhi0 = sinPhi, cosPhi0 = cosPhi;

        }
 
        }
 

-       function Rgb(r, g, b, opacity) {
-         this.r = +r;
-         this.g = +g;
-         this.b = +b;
-         this.opacity = +opacity;
+       function d3_geoLength (object) {
+         lengthSum$1 = new Adder();
+         d3_geoStream(object, lengthStream$1);
+         return +lengthSum$1;

        }
 
        }
 

-       define$1(Rgb, rgb, extend(Color, {
-         brighter: function(k) {
-           k = k == null ? brighter : Math.pow(brighter, k);
-           return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
-         },
-         darker: function(k) {
-           k = k == null ? darker : Math.pow(darker, k);
-           return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
-         },
-         rgb: function() {
-           return this;
+       var identity$4 = (function (x) {
+         return x;
+       });
+
+       var areaSum = new Adder(),
+           areaRingSum = new Adder(),
+           x00$2,
+           y00$2,
+           x0$3,
+           y0$3;
+       var areaStream = {
+         point: noop$1,
+         lineStart: noop$1,
+         lineEnd: noop$1,
+         polygonStart: function polygonStart() {
+           areaStream.lineStart = areaRingStart;
+           areaStream.lineEnd = areaRingEnd;

          },
          },

-         displayable: function() {
-           return (-0.5 <= this.r && this.r < 255.5)
-               && (-0.5 <= this.g && this.g < 255.5)
-               && (-0.5 <= this.b && this.b < 255.5)
-               && (0 <= this.opacity && this.opacity <= 1);
+         polygonEnd: function polygonEnd() {
+           areaStream.lineStart = areaStream.lineEnd = areaStream.point = noop$1;
+           areaSum.add(abs$2(areaRingSum));
+           areaRingSum = new Adder();

          },
          },

-         hex: rgb_formatHex, // Deprecated! Use color.formatHex.
-         formatHex: rgb_formatHex,
-         formatRgb: rgb_formatRgb,
-         toString: rgb_formatRgb
-       }));
+         result: function result() {
+           var area = areaSum / 2;
+           areaSum = new Adder();
+           return area;
+         }
+       };

 
 

-       function rgb_formatHex() {
-         return "#" + hex$1(this.r) + hex$1(this.g) + hex$1(this.b);
+       function areaRingStart() {
+         areaStream.point = areaPointFirst;

        }
 
        }
 

-       function rgb_formatRgb() {
-         var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
-         return (a === 1 ? "rgb(" : "rgba(")
-             + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", "
-             + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", "
-             + Math.max(0, Math.min(255, Math.round(this.b) || 0))
-             + (a === 1 ? ")" : ", " + a + ")");
+       function areaPointFirst(x, y) {
+         areaStream.point = areaPoint;
+         x00$2 = x0$3 = x, y00$2 = y0$3 = y;

        }
 
        }
 

-       function hex$1(value) {
-         value = Math.max(0, Math.min(255, Math.round(value) || 0));
-         return (value < 16 ? "0" : "") + value.toString(16);
+       function areaPoint(x, y) {
+         areaRingSum.add(y0$3 * x - x0$3 * y);
+         x0$3 = x, y0$3 = y;

        }
 
        }
 

-       function hsla(h, s, l, a) {
-         if (a <= 0) { h = s = l = NaN; }
-         else if (l <= 0 || l >= 1) { h = s = NaN; }
-         else if (s <= 0) { h = NaN; }
-         return new Hsl(h, s, l, a);
+       function areaRingEnd() {
+         areaPoint(x00$2, y00$2);

        }
 
        }
 

-       function hslConvert(o) {
-         if (o instanceof Hsl) { return new Hsl(o.h, o.s, o.l, o.opacity); }
-         if (!(o instanceof Color)) { o = color(o); }
-         if (!o) { return new Hsl; }
-         if (o instanceof Hsl) { return o; }
-         o = o.rgb();
-         var r = o.r / 255,
-             g = o.g / 255,
-             b = o.b / 255,
-             min = Math.min(r, g, b),
-             max = Math.max(r, g, b),
-             h = NaN,
-             s = max - min,
-             l = (max + min) / 2;
-         if (s) {
-           if (r === max) { h = (g - b) / s + (g < b) * 6; }
-           else if (g === max) { h = (b - r) / s + 2; }
-           else { h = (r - g) / s + 4; }
-           s /= l < 0.5 ? max + min : 2 - max - min;
-           h *= 60;
-         } else {
-           s = l > 0 && l < 1 ? 0 : h;
+       var x0$2 = Infinity,
+           y0$2 = x0$2,
+           x1 = -x0$2,
+           y1 = x1;
+       var boundsStream = {
+         point: boundsPoint,
+         lineStart: noop$1,
+         lineEnd: noop$1,
+         polygonStart: noop$1,
+         polygonEnd: noop$1,
+         result: function result() {
+           var bounds = [[x0$2, y0$2], [x1, y1]];
+           x1 = y1 = -(y0$2 = x0$2 = Infinity);
+           return bounds;

          }
          }

-         return new Hsl(h, s, l, o.opacity);
-       }
-
-       function hsl(h, s, l, opacity) {
-         return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
-       }
+       };

 
 

-       function Hsl(h, s, l, opacity) {
-         this.h = +h;
-         this.s = +s;
-         this.l = +l;
-         this.opacity = +opacity;
+       function boundsPoint(x, y) {
+         if (x < x0$2) x0$2 = x;
+         if (x > x1) x1 = x;
+         if (y < y0$2) y0$2 = y;
+         if (y > y1) y1 = y;

        }
 
        }
 

-       define$1(Hsl, hsl, extend(Color, {
-         brighter: function(k) {
-           k = k == null ? brighter : Math.pow(brighter, k);
-           return new Hsl(this.h, this.s, this.l * k, this.opacity);
-         },
-         darker: function(k) {
-           k = k == null ? darker : Math.pow(darker, k);
-           return new Hsl(this.h, this.s, this.l * k, this.opacity);
-         },
-         rgb: function() {
-           var h = this.h % 360 + (this.h < 0) * 360,
-               s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
-               l = this.l,
-               m2 = l + (l < 0.5 ? l : 1 - l) * s,
-               m1 = 2 * l - m2;
-           return new Rgb(
-             hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2),
-             hsl2rgb(h, m1, m2),
-             hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2),
-             this.opacity
-           );
+       var X0 = 0,
+           Y0 = 0,
+           Z0 = 0,
+           X1 = 0,
+           Y1 = 0,
+           Z1 = 0,
+           X2 = 0,
+           Y2 = 0,
+           Z2 = 0,
+           x00$1,
+           y00$1,
+           x0$1,
+           y0$1;
+       var centroidStream = {
+         point: centroidPoint,
+         lineStart: centroidLineStart,
+         lineEnd: centroidLineEnd,
+         polygonStart: function polygonStart() {
+           centroidStream.lineStart = centroidRingStart;
+           centroidStream.lineEnd = centroidRingEnd;

          },
          },

-         displayable: function() {
-           return (0 <= this.s && this.s <= 1 || isNaN(this.s))
-               && (0 <= this.l && this.l <= 1)
-               && (0 <= this.opacity && this.opacity <= 1);
+         polygonEnd: function polygonEnd() {
+           centroidStream.point = centroidPoint;
+           centroidStream.lineStart = centroidLineStart;
+           centroidStream.lineEnd = centroidLineEnd;

          },
          },

-         formatHsl: function() {
-           var a = this.opacity; a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
-           return (a === 1 ? "hsl(" : "hsla(")
-               + (this.h || 0) + ", "
-               + (this.s || 0) * 100 + "%, "
-               + (this.l || 0) * 100 + "%"
-               + (a === 1 ? ")" : ", " + a + ")");
+         result: function result() {
+           var centroid = Z2 ? [X2 / Z2, Y2 / Z2] : Z1 ? [X1 / Z1, Y1 / Z1] : Z0 ? [X0 / Z0, Y0 / Z0] : [NaN, NaN];
+           X0 = Y0 = Z0 = X1 = Y1 = Z1 = X2 = Y2 = Z2 = 0;
+           return centroid;

          }
          }

-       }));
+       };

 
 

-       /* From FvD 13.37, CSS Color Module Level 3 */
-       function hsl2rgb(h, m1, m2) {
-         return (h < 60 ? m1 + (m2 - m1) * h / 60
-             : h < 180 ? m2
-             : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60
-             : m1) * 255;
+       function centroidPoint(x, y) {
+         X0 += x;
+         Y0 += y;
+         ++Z0;

        }
 
        }
 

-       function constant$2(x) {
-         return function() {
-           return x;
-         };
+       function centroidLineStart() {
+         centroidStream.point = centroidPointFirstLine;

        }
 
        }
 

-       function linear(a, d) {
-         return function(t) {
-           return a + t * d;
-         };
+       function centroidPointFirstLine(x, y) {
+         centroidStream.point = centroidPointLine;
+         centroidPoint(x0$1 = x, y0$1 = y);

        }
 
        }
 

-       function exponential(a, b, y) {
-         return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function(t) {
-           return Math.pow(a + t * b, y);
-         };
+       function centroidPointLine(x, y) {
+         var dx = x - x0$1,
+             dy = y - y0$1,
+             z = sqrt(dx * dx + dy * dy);
+         X1 += z * (x0$1 + x) / 2;
+         Y1 += z * (y0$1 + y) / 2;
+         Z1 += z;
+         centroidPoint(x0$1 = x, y0$1 = y);

        }
 
        }
 

-       function gamma(y) {
-         return (y = +y) === 1 ? nogamma : function(a, b) {
-           return b - a ? exponential(a, b, y) : constant$2(isNaN(a) ? b : a);
-         };
+       function centroidLineEnd() {
+         centroidStream.point = centroidPoint;

        }
 
        }
 

-       function nogamma(a, b) {
-         var d = b - a;
-         return d ? linear(a, d) : constant$2(isNaN(a) ? b : a);
+       function centroidRingStart() {
+         centroidStream.point = centroidPointFirstRing;

        }
 
        }
 

-       var d3_interpolateRgb = (function rgbGamma(y) {
-         var color = gamma(y);
-
-         function rgb$1(start, end) {
-           var r = color((start = rgb(start)).r, (end = rgb(end)).r),
-               g = color(start.g, end.g),
-               b = color(start.b, end.b),
-               opacity = nogamma(start.opacity, end.opacity);
-           return function(t) {
-             start.r = r(t);
-             start.g = g(t);
-             start.b = b(t);
-             start.opacity = opacity(t);
-             return start + "";
-           };
-         }
-
-         rgb$1.gamma = rgbGamma;
+       function centroidRingEnd() {
+         centroidPointRing(x00$1, y00$1);
+       }

 
 

-         return rgb$1;
-       })(1);
+       function centroidPointFirstRing(x, y) {
+         centroidStream.point = centroidPointRing;
+         centroidPoint(x00$1 = x0$1 = x, y00$1 = y0$1 = y);
+       }

 
 

-       function numberArray(a, b) {
-         if (!b) { b = []; }
-         var n = a ? Math.min(b.length, a.length) : 0,
-             c = b.slice(),
-             i;
-         return function(t) {
-           for (i = 0; i < n; ++i) { c[i] = a[i] * (1 - t) + b[i] * t; }
-           return c;
-         };
+       function centroidPointRing(x, y) {
+         var dx = x - x0$1,
+             dy = y - y0$1,
+             z = sqrt(dx * dx + dy * dy);
+         X1 += z * (x0$1 + x) / 2;
+         Y1 += z * (y0$1 + y) / 2;
+         Z1 += z;
+         z = y0$1 * x - x0$1 * y;
+         X2 += z * (x0$1 + x);
+         Y2 += z * (y0$1 + y);
+         Z2 += z * 3;
+         centroidPoint(x0$1 = x, y0$1 = y);

        }
 
        }
 

-       function isNumberArray(x) {
-         return ArrayBuffer.isView(x) && !(x instanceof DataView);
+       function PathContext(context) {
+         this._context = context;

        }
        }

+       PathContext.prototype = {
+         _radius: 4.5,
+         pointRadius: function pointRadius(_) {
+           return this._radius = _, this;
+         },
+         polygonStart: function polygonStart() {
+           this._line = 0;
+         },
+         polygonEnd: function polygonEnd() {
+           this._line = NaN;
+         },
+         lineStart: function lineStart() {
+           this._point = 0;
+         },
+         lineEnd: function lineEnd() {
+           if (this._line === 0) this._context.closePath();
+           this._point = NaN;
+         },
+         point: function point(x, y) {
+           switch (this._point) {
+             case 0:
+               {
+                 this._context.moveTo(x, y);

 
 

-       function genericArray(a, b) {
-         var nb = b ? b.length : 0,
-             na = a ? Math.min(nb, a.length) : 0,
-             x = new Array(na),
-             c = new Array(nb),
-             i;
+                 this._point = 1;
+                 break;
+               }

 
 

-         for (i = 0; i < na; ++i) { x[i] = interpolate(a[i], b[i]); }
-         for (; i < nb; ++i) { c[i] = b[i]; }
+             case 1:
+               {
+                 this._context.lineTo(x, y);

 
 

-         return function(t) {
-           for (i = 0; i < na; ++i) { c[i] = x[i](t); }
-           return c;
-         };
+                 break;
+               }
+
+             default:
+               {
+                 this._context.moveTo(x + this._radius, y);
+
+                 this._context.arc(x, y, this._radius, 0, tau);
+
+                 break;
+               }
+           }
+         },
+         result: noop$1
+       };
+
+       var lengthSum = new Adder(),
+           lengthRing,
+           x00,
+           y00,
+           x0,
+           y0;
+       var lengthStream = {
+         point: noop$1,
+         lineStart: function lineStart() {
+           lengthStream.point = lengthPointFirst;
+         },
+         lineEnd: function lineEnd() {
+           if (lengthRing) lengthPoint(x00, y00);
+           lengthStream.point = noop$1;
+         },
+         polygonStart: function polygonStart() {
+           lengthRing = true;
+         },
+         polygonEnd: function polygonEnd() {
+           lengthRing = null;
+         },
+         result: function result() {
+           var length = +lengthSum;
+           lengthSum = new Adder();
+           return length;
+         }
+       };
+
+       function lengthPointFirst(x, y) {
+         lengthStream.point = lengthPoint;
+         x00 = x0 = x, y00 = y0 = y;

        }
 
        }
 

-       function date(a, b) {
-         var d = new Date;
-         return a = +a, b = +b, function(t) {
-           return d.setTime(a * (1 - t) + b * t), d;
-         };
+       function lengthPoint(x, y) {
+         x0 -= x, y0 -= y;
+         lengthSum.add(sqrt(x0 * x0 + y0 * y0));
+         x0 = x, y0 = y;

        }
 
        }
 

-       function d3_interpolateNumber(a, b) {
-         return a = +a, b = +b, function(t) {
-           return a * (1 - t) + b * t;
-         };
+       function PathString() {
+         this._string = [];

        }
        }

+       PathString.prototype = {
+         _radius: 4.5,
+         _circle: circle(4.5),
+         pointRadius: function pointRadius(_) {
+           if ((_ = +_) !== this._radius) this._radius = _, this._circle = null;
+           return this;
+         },
+         polygonStart: function polygonStart() {
+           this._line = 0;
+         },
+         polygonEnd: function polygonEnd() {
+           this._line = NaN;
+         },
+         lineStart: function lineStart() {
+           this._point = 0;
+         },
+         lineEnd: function lineEnd() {
+           if (this._line === 0) this._string.push("Z");
+           this._point = NaN;
+         },
+         point: function point(x, y) {
+           switch (this._point) {
+             case 0:
+               {
+                 this._string.push("M", x, ",", y);

 
 

-       function object(a, b) {
-         var i = {},
-             c = {},
-             k;
+                 this._point = 1;
+                 break;
+               }

 
 

-         if (a === null || typeof a !== "object") { a = {}; }
-         if (b === null || typeof b !== "object") { b = {}; }
+             case 1:
+               {
+                 this._string.push("L", x, ",", y);

 
 

-         for (k in b) {
-           if (k in a) {
-             i[k] = interpolate(a[k], b[k]);
+                 break;
+               }
+
+             default:
+               {
+                 if (this._circle == null) this._circle = circle(this._radius);
+
+                 this._string.push("M", x, ",", y, this._circle);
+
+                 break;
+               }
+           }
+         },
+         result: function result() {
+           if (this._string.length) {
+             var result = this._string.join("");
+
+             this._string = [];
+             return result;

            } else {
            } else {

-             c[k] = b[k];
+             return null;

            }
          }
            }
          }

+       };

 
 

-         return function(t) {
-           for (k in i) { c[k] = i[k](t); }
-           return c;
-         };
+       function circle(radius) {
+         return "m0," + radius + "a" + radius + "," + radius + " 0 1,1 0," + -2 * radius + "a" + radius + "," + radius + " 0 1,1 0," + 2 * radius + "z";

        }
 
        }
 

-       var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
-           reB = new RegExp(reA.source, "g");
+       function d3_geoPath (projection, context) {
+         var pointRadius = 4.5,
+             projectionStream,
+             contextStream;

 
 

-       function zero(b) {
-         return function() {
-           return b;
+         function path(object) {
+           if (object) {
+             if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
+             d3_geoStream(object, projectionStream(contextStream));
+           }
+
+           return contextStream.result();
+         }
+
+         path.area = function (object) {
+           d3_geoStream(object, projectionStream(areaStream));
+           return areaStream.result();

          };
          };

-       }

 
 

-       function one(b) {
-         return function(t) {
-           return b(t) + "";
+         path.measure = function (object) {
+           d3_geoStream(object, projectionStream(lengthStream));
+           return lengthStream.result();

          };
          };

-       }

 
 

-       function interpolateString(a, b) {
-         var bi = reA.lastIndex = reB.lastIndex = 0, // scan index for next number in b
-             am, // current match in a
-             bm, // current match in b
-             bs, // string preceding current number in b, if any
-             i = -1, // index in s
-             s = [], // string constants and placeholders
-             q = []; // number interpolators
+         path.bounds = function (object) {
+           d3_geoStream(object, projectionStream(boundsStream));
+           return boundsStream.result();
+         };

 
 

-         // Coerce inputs to strings.
-         a = a + "", b = b + "";
+         path.centroid = function (object) {
+           d3_geoStream(object, projectionStream(centroidStream));
+           return centroidStream.result();
+         };

 
 

-         // Interpolate pairs of numbers in a & b.
-         while ((am = reA.exec(a))
-             && (bm = reB.exec(b))) {
-           if ((bs = bm.index) > bi) { // a string precedes the next number in b
-             bs = b.slice(bi, bs);
-             if (s[i]) { s[i] += bs; } // coalesce with previous string
-             else { s[++i] = bs; }
-           }
-           if ((am = am[0]) === (bm = bm[0])) { // numbers in a & b match
-             if (s[i]) { s[i] += bm; } // coalesce with previous string
-             else { s[++i] = bm; }
-           } else { // interpolate non-matching numbers
-             s[++i] = null;
-             q.push({i: i, x: d3_interpolateNumber(am, bm)});
-           }
-           bi = reB.lastIndex;
-         }
+         path.projection = function (_) {
+           return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection;
+         };

 
 

-         // Add remains of b.
-         if (bi < b.length) {
-           bs = b.slice(bi);
-           if (s[i]) { s[i] += bs; } // coalesce with previous string
-           else { s[++i] = bs; }
-         }
+         path.context = function (_) {
+           if (!arguments.length) return context;
+           contextStream = _ == null ? (context = null, new PathString()) : new PathContext(context = _);
+           if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
+           return path;
+         };

 
 

-         // Special optimization for only a single match.
-         // Otherwise, interpolate each of the numbers and rejoin the string.
-         return s.length < 2 ? (q[0]
-             ? one(q[0].x)
-             : zero(b))
-             : (b = q.length, function(t) {
-                 for (var i = 0, o; i < b; ++i) { s[(o = q[i]).i] = o.x(t); }
-                 return s.join("");
-               });
+         path.pointRadius = function (_) {
+           if (!arguments.length) return pointRadius;
+           pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
+           return path;
+         };
+
+         return path.projection(projection).context(context);

        }
 
        }
 

-       function interpolate(a, b) {
-         var t = typeof b, c;
-         return b == null || t === "boolean" ? constant$2(b)
-             : (t === "number" ? d3_interpolateNumber
-             : t === "string" ? ((c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString)
-             : b instanceof color ? d3_interpolateRgb
-             : b instanceof Date ? date
-             : isNumberArray(b) ? numberArray
-             : Array.isArray(b) ? genericArray
-             : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object
-             : d3_interpolateNumber)(a, b);
+       function d3_geoTransform (methods) {
+         return {
+           stream: transformer$1(methods)
+         };

        }
        }

+       function transformer$1(methods) {
+         return function (stream) {
+           var s = new TransformStream();

 
 

-       function interpolateRound(a, b) {
-         return a = +a, b = +b, function(t) {
-           return Math.round(a * (1 - t) + b * t);
+           for (var key in methods) {
+             s[key] = methods[key];
+           }
+
+           s.stream = stream;
+           return s;

          };
        }
 
          };
        }
 

-       var degrees$1 = 180 / Math.PI;
+       function TransformStream() {}

 
 

-       var identity$1 = {
-         translateX: 0,
-         translateY: 0,
-         rotate: 0,
-         skewX: 0,
-         scaleX: 1,
-         scaleY: 1
+       TransformStream.prototype = {
+         constructor: TransformStream,
+         point: function point(x, y) {
+           this.stream.point(x, y);
+         },
+         sphere: function sphere() {
+           this.stream.sphere();
+         },
+         lineStart: function lineStart() {
+           this.stream.lineStart();
+         },
+         lineEnd: function lineEnd() {
+           this.stream.lineEnd();
+         },
+         polygonStart: function polygonStart() {
+           this.stream.polygonStart();
+         },
+         polygonEnd: function polygonEnd() {
+           this.stream.polygonEnd();
+         }

        };
 
        };
 

-       function decompose(a, b, c, d, e, f) {
-         var scaleX, scaleY, skewX;
-         if (scaleX = Math.sqrt(a * a + b * b)) { a /= scaleX, b /= scaleX; }
-         if (skewX = a * c + b * d) { c -= a * skewX, d -= b * skewX; }
-         if (scaleY = Math.sqrt(c * c + d * d)) { c /= scaleY, d /= scaleY, skewX /= scaleY; }
-         if (a * d < b * c) { a = -a, b = -b, skewX = -skewX, scaleX = -scaleX; }
-         return {
-           translateX: e,
-           translateY: f,
-           rotate: Math.atan2(b, a) * degrees$1,
-           skewX: Math.atan(skewX) * degrees$1,
-           scaleX: scaleX,
-           scaleY: scaleY
-         };
+       function fit(projection, fitBounds, object) {
+         var clip = projection.clipExtent && projection.clipExtent();
+         projection.scale(150).translate([0, 0]);
+         if (clip != null) projection.clipExtent(null);
+         d3_geoStream(object, projection.stream(boundsStream));
+         fitBounds(boundsStream.result());
+         if (clip != null) projection.clipExtent(clip);
+         return projection;
+       }
+
+       function fitExtent(projection, extent, object) {
+         return fit(projection, function (b) {
+           var w = extent[1][0] - extent[0][0],
+               h = extent[1][1] - extent[0][1],
+               k = Math.min(w / (b[1][0] - b[0][0]), h / (b[1][1] - b[0][1])),
+               x = +extent[0][0] + (w - k * (b[1][0] + b[0][0])) / 2,
+               y = +extent[0][1] + (h - k * (b[1][1] + b[0][1])) / 2;
+           projection.scale(150 * k).translate([x, y]);
+         }, object);
+       }
+       function fitSize(projection, size, object) {
+         return fitExtent(projection, [[0, 0], size], object);
+       }
+       function fitWidth(projection, width, object) {
+         return fit(projection, function (b) {
+           var w = +width,
+               k = w / (b[1][0] - b[0][0]),
+               x = (w - k * (b[1][0] + b[0][0])) / 2,
+               y = -k * b[0][1];
+           projection.scale(150 * k).translate([x, y]);
+         }, object);
+       }
+       function fitHeight(projection, height, object) {
+         return fit(projection, function (b) {
+           var h = +height,
+               k = h / (b[1][1] - b[0][1]),
+               x = -k * b[0][0],
+               y = (h - k * (b[1][1] + b[0][1])) / 2;
+           projection.scale(150 * k).translate([x, y]);
+         }, object);

        }
 
        }
 

-       var cssNode,
-           cssRoot,
-           cssView,
-           svgNode;
+       var maxDepth = 16,
+           // maximum depth of subdivision
+       cosMinDistance = cos(30 * radians); // cos(minimum angular distance)

 
 

-       function parseCss(value) {
-         if (value === "none") { return identity$1; }
-         if (!cssNode) { cssNode = document.createElement("DIV"), cssRoot = document.documentElement, cssView = document.defaultView; }
-         cssNode.style.transform = value;
-         value = cssView.getComputedStyle(cssRoot.appendChild(cssNode), null).getPropertyValue("transform");
-         cssRoot.removeChild(cssNode);
-         value = value.slice(7, -1).split(",");
-         return decompose(+value[0], +value[1], +value[2], +value[3], +value[4], +value[5]);
+       function resample (project, delta2) {
+         return +delta2 ? resample$1(project, delta2) : resampleNone(project);

        }
 
        }
 

-       function parseSvg(value) {
-         if (value == null) { return identity$1; }
-         if (!svgNode) { svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g"); }
-         svgNode.setAttribute("transform", value);
-         if (!(value = svgNode.transform.baseVal.consolidate())) { return identity$1; }
-         value = value.matrix;
-         return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
+       function resampleNone(project) {
+         return transformer$1({
+           point: function point(x, y) {
+             x = project(x, y);
+             this.stream.point(x[0], x[1]);
+           }
+         });

        }
 
        }
 

-       function interpolateTransform(parse, pxComma, pxParen, degParen) {
+       function resample$1(project, delta2) {
+         function resampleLineTo(x0, y0, lambda0, a0, b0, c0, x1, y1, lambda1, a1, b1, c1, depth, stream) {
+           var dx = x1 - x0,
+               dy = y1 - y0,
+               d2 = dx * dx + dy * dy;

 
 

-         function pop(s) {
-           return s.length ? s.pop() + " " : "";
-         }
+           if (d2 > 4 * delta2 && depth--) {
+             var a = a0 + a1,
+                 b = b0 + b1,
+                 c = c0 + c1,
+                 m = sqrt(a * a + b * b + c * c),
+                 phi2 = asin(c /= m),
+                 lambda2 = abs$2(abs$2(c) - 1) < epsilon$1 || abs$2(lambda0 - lambda1) < epsilon$1 ? (lambda0 + lambda1) / 2 : atan2(b, a),
+                 p = project(lambda2, phi2),
+                 x2 = p[0],
+                 y2 = p[1],
+                 dx2 = x2 - x0,
+                 dy2 = y2 - y0,
+                 dz = dy * dx2 - dx * dy2;

 
 

-         function translate(xa, ya, xb, yb, s, q) {
-           if (xa !== xb || ya !== yb) {
-             var i = s.push("translate(", null, pxComma, null, pxParen);
-             q.push({i: i - 4, x: d3_interpolateNumber(xa, xb)}, {i: i - 2, x: d3_interpolateNumber(ya, yb)});
-           } else if (xb || yb) {
-             s.push("translate(" + xb + pxComma + yb + pxParen);
+             if (dz * dz / d2 > delta2 // perpendicular projected distance
+             || abs$2((dx * dx2 + dy * dy2) / d2 - 0.5) > 0.3 // midpoint close to an end
+             || a0 * a1 + b0 * b1 + c0 * c1 < cosMinDistance) {
+               // angular distance
+               resampleLineTo(x0, y0, lambda0, a0, b0, c0, x2, y2, lambda2, a /= m, b /= m, c, depth, stream);
+               stream.point(x2, y2);
+               resampleLineTo(x2, y2, lambda2, a, b, c, x1, y1, lambda1, a1, b1, c1, depth, stream);
+             }

            }
          }
 
            }
          }
 

-         function rotate(a, b, s, q) {
-           if (a !== b) {
-             if (a - b > 180) { b += 360; } else if (b - a > 180) { a += 360; } // shortest path
-             q.push({i: s.push(pop(s) + "rotate(", null, degParen) - 2, x: d3_interpolateNumber(a, b)});
-           } else if (b) {
-             s.push(pop(s) + "rotate(" + b + degParen);
+         return function (stream) {
+           var lambda00, x00, y00, a00, b00, c00, // first point
+           lambda0, x0, y0, a0, b0, c0; // previous point
+
+           var resampleStream = {
+             point: point,
+             lineStart: lineStart,
+             lineEnd: lineEnd,
+             polygonStart: function polygonStart() {
+               stream.polygonStart();
+               resampleStream.lineStart = ringStart;
+             },
+             polygonEnd: function polygonEnd() {
+               stream.polygonEnd();
+               resampleStream.lineStart = lineStart;
+             }
+           };
+
+           function point(x, y) {
+             x = project(x, y);
+             stream.point(x[0], x[1]);

            }
            }

-         }

 
 

-         function skewX(a, b, s, q) {
-           if (a !== b) {
-             q.push({i: s.push(pop(s) + "skewX(", null, degParen) - 2, x: d3_interpolateNumber(a, b)});
-           } else if (b) {
-             s.push(pop(s) + "skewX(" + b + degParen);
+           function lineStart() {
+             x0 = NaN;
+             resampleStream.point = linePoint;
+             stream.lineStart();

            }
            }

-         }

 
 

-         function scale(xa, ya, xb, yb, s, q) {
-           if (xa !== xb || ya !== yb) {
-             var i = s.push(pop(s) + "scale(", null, ",", null, ")");
-             q.push({i: i - 4, x: d3_interpolateNumber(xa, xb)}, {i: i - 2, x: d3_interpolateNumber(ya, yb)});
-           } else if (xb !== 1 || yb !== 1) {
-             s.push(pop(s) + "scale(" + xb + "," + yb + ")");
+           function linePoint(lambda, phi) {
+             var c = cartesian([lambda, phi]),
+                 p = project(lambda, phi);
+             resampleLineTo(x0, y0, lambda0, a0, b0, c0, x0 = p[0], y0 = p[1], lambda0 = lambda, a0 = c[0], b0 = c[1], c0 = c[2], maxDepth, stream);
+             stream.point(x0, y0);

            }
            }

-         }

 
 

-         return function(a, b) {
-           var s = [], // string constants and placeholders
-               q = []; // number interpolators
-           a = parse(a), b = parse(b);
-           translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
-           rotate(a.rotate, b.rotate, s, q);
-           skewX(a.skewX, b.skewX, s, q);
-           scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
-           a = b = null; // gc
-           return function(t) {
-             var i = -1, n = q.length, o;
-             while (++i < n) { s[(o = q[i]).i] = o.x(t); }
-             return s.join("");
-           };
-         };
-       }
+           function lineEnd() {
+             resampleStream.point = point;
+             stream.lineEnd();
+           }

 
 

-       var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
-       var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
+           function ringStart() {
+             lineStart();
+             resampleStream.point = ringPoint;
+             resampleStream.lineEnd = ringEnd;
+           }

 
 

-       var rho = Math.SQRT2,
-           rho2 = 2,
-           rho4 = 4,
-           epsilon2$1 = 1e-12;
+           function ringPoint(lambda, phi) {
+             linePoint(lambda00 = lambda, phi), x00 = x0, y00 = y0, a00 = a0, b00 = b0, c00 = c0;
+             resampleStream.point = linePoint;
+           }

 
 

-       function cosh(x) {
-         return ((x = Math.exp(x)) + 1 / x) / 2;
-       }
+           function ringEnd() {
+             resampleLineTo(x0, y0, lambda0, a0, b0, c0, x00, y00, lambda00, a00, b00, c00, maxDepth, stream);
+             resampleStream.lineEnd = lineEnd;
+             lineEnd();
+           }

 
 

-       function sinh(x) {
-         return ((x = Math.exp(x)) - 1 / x) / 2;
+           return resampleStream;
+         };

        }
 
        }
 

-       function tanh(x) {
-         return ((x = Math.exp(2 * x)) - 1) / (x + 1);
+       var transformRadians = transformer$1({
+         point: function point(x, y) {
+           this.stream.point(x * radians, y * radians);
+         }
+       });
+
+       function transformRotate(rotate) {
+         return transformer$1({
+           point: function point(x, y) {
+             var r = rotate(x, y);
+             return this.stream.point(r[0], r[1]);
+           }
+         });

        }
 
        }
 

-       // p0 = [ux0, uy0, w0]
-       // p1 = [ux1, uy1, w1]
-       function interpolateZoom(p0, p1) {
-         var ux0 = p0[0], uy0 = p0[1], w0 = p0[2],
-             ux1 = p1[0], uy1 = p1[1], w1 = p1[2],
-             dx = ux1 - ux0,
-             dy = uy1 - uy0,
-             d2 = dx * dx + dy * dy,
-             i,
-             S;
-
-         // Special case for u0 ≅ u1.
-         if (d2 < epsilon2$1) {
-           S = Math.log(w1 / w0) / rho;
-           i = function(t) {
-             return [
-               ux0 + t * dx,
-               uy0 + t * dy,
-               w0 * Math.exp(rho * t * S)
-             ];
-           };
+       function scaleTranslate(k, dx, dy, sx, sy) {
+         function transform(x, y) {
+           x *= sx;
+           y *= sy;
+           return [dx + k * x, dy - k * y];

          }
 
          }
 

-         // General case.
-         else {
-           var d1 = Math.sqrt(d2),
-               b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
-               b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
-               r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
-               r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
-           S = (r1 - r0) / rho;
-           i = function(t) {
-             var s = t * S,
-                 coshr0 = cosh(r0),
-                 u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
-             return [
-               ux0 + u * dx,
-               uy0 + u * dy,
-               w0 * coshr0 / cosh(rho * s + r0)
-             ];
-           };
+         transform.invert = function (x, y) {
+           return [(x - dx) / k * sx, (dy - y) / k * sy];
+         };
+
+         return transform;
+       }
+
+       function scaleTranslateRotate(k, dx, dy, sx, sy, alpha) {
+         if (!alpha) return scaleTranslate(k, dx, dy, sx, sy);
+         var cosAlpha = cos(alpha),
+             sinAlpha = sin(alpha),
+             a = cosAlpha * k,
+             b = sinAlpha * k,
+             ai = cosAlpha / k,
+             bi = sinAlpha / k,
+             ci = (sinAlpha * dy - cosAlpha * dx) / k,
+             fi = (sinAlpha * dx + cosAlpha * dy) / k;
+
+         function transform(x, y) {
+           x *= sx;
+           y *= sy;
+           return [a * x - b * y + dx, dy - b * x - a * y];

          }
 
          }
 

-         i.duration = S * 1000;
+         transform.invert = function (x, y) {
+           return [sx * (ai * x - bi * y + ci), sy * (fi - bi * x - ai * y)];
+         };

 
 

-         return i;
+         return transform;

        }
 
        }
 

-       function d3_quantize(interpolator, n) {
-         var samples = new Array(n);
-         for (var i = 0; i < n; ++i) { samples[i] = interpolator(i / (n - 1)); }
-         return samples;
-       }
-
-       var frame = 0, // is an animation frame pending?
-           timeout = 0, // is a timeout pending?
-           interval = 0, // are any timers active?
-           pokeDelay = 1000, // how frequently we check for clock skew
-           taskHead,
-           taskTail,
-           clockLast = 0,
-           clockNow = 0,
-           clockSkew = 0,
-           clock = typeof performance === "object" && performance.now ? performance : Date,
-           setFrame = typeof window === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function(f) { setTimeout(f, 17); };
-
-       function now() {
-         return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
-       }
-
-       function clearNow() {
-         clockNow = 0;
-       }
-
-       function Timer() {
-         this._call =
-         this._time =
-         this._next = null;
-       }
-
-       Timer.prototype = timer.prototype = {
-         constructor: Timer,
-         restart: function(callback, delay, time) {
-           if (typeof callback !== "function") { throw new TypeError("callback is not a function"); }
-           time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
-           if (!this._next && taskTail !== this) {
-             if (taskTail) { taskTail._next = this; }
-             else { taskHead = this; }
-             taskTail = this;
-           }
-           this._call = callback;
-           this._time = time;
-           sleep();
-         },
-         stop: function() {
-           if (this._call) {
-             this._call = null;
-             this._time = Infinity;
-             sleep();
-           }
-         }
-       };
-
-       function timer(callback, delay, time) {
-         var t = new Timer;
-         t.restart(callback, delay, time);
-         return t;
-       }
-
-       function timerFlush() {
-         now(); // Get the current time, if not already set.
-         ++frame; // Pretend we’ve set an alarm, if we haven’t already.
-         var t = taskHead, e;
-         while (t) {
-           if ((e = clockNow - t._time) >= 0) { t._call.call(null, e); }
-           t = t._next;
-         }
-         --frame;
-       }
-
-       function wake() {
-         clockNow = (clockLast = clock.now()) + clockSkew;
-         frame = timeout = 0;
-         try {
-           timerFlush();
-         } finally {
-           frame = 0;
-           nap();
-           clockNow = 0;
-         }
-       }
-
-       function poke() {
-         var now = clock.now(), delay = now - clockLast;
-         if (delay > pokeDelay) { clockSkew -= delay, clockLast = now; }
+       function projection(project) {
+         return projectionMutator(function () {
+           return project;
+         })();

        }
        }

+       function projectionMutator(projectAt) {
+         var project,
+             k = 150,
+             // scale
+         x = 480,
+             y = 250,
+             // translate
+         lambda = 0,
+             phi = 0,
+             // center
+         deltaLambda = 0,
+             deltaPhi = 0,
+             deltaGamma = 0,
+             rotate,
+             // pre-rotate
+         alpha = 0,
+             // post-rotate angle
+         sx = 1,
+             // reflectX
+         sy = 1,
+             // reflectX
+         theta = null,
+             preclip = clipAntimeridian,
+             // pre-clip angle
+         x0 = null,
+             y0,
+             x1,
+             y1,
+             postclip = identity$4,
+             // post-clip extent
+         delta2 = 0.5,
+             // precision
+         projectResample,
+             projectTransform,
+             projectRotateTransform,
+             cache,
+             cacheStream;

 
 

-       function nap() {
-         var t0, t1 = taskHead, t2, time = Infinity;
-         while (t1) {
-           if (t1._call) {
-             if (time > t1._time) { time = t1._time; }
-             t0 = t1, t1 = t1._next;
-           } else {
-             t2 = t1._next, t1._next = null;
-             t1 = t0 ? t0._next = t2 : taskHead = t2;
-           }
+         function projection(point) {
+           return projectRotateTransform(point[0] * radians, point[1] * radians);

          }
          }

-         taskTail = t0;
-         sleep(time);
-       }

 
 

-       function sleep(time) {
-         if (frame) { return; } // Soonest alarm already set, or will be.
-         if (timeout) { timeout = clearTimeout(timeout); }
-         var delay = time - clockNow; // Strictly less than if we recomputed clockNow.
-         if (delay > 24) {
-           if (time < Infinity) { timeout = setTimeout(wake, time - clock.now() - clockSkew); }
-           if (interval) { interval = clearInterval(interval); }
-         } else {
-           if (!interval) { clockLast = clock.now(), interval = setInterval(poke, pokeDelay); }
-           frame = 1, setFrame(wake);
+         function invert(point) {
+           point = projectRotateTransform.invert(point[0], point[1]);
+           return point && [point[0] * degrees$1, point[1] * degrees$1];

          }
          }

-       }
-
-       function d3_timeout(callback, delay, time) {
-         var t = new Timer;
-         delay = delay == null ? 0 : +delay;
-         t.restart(function(elapsed) {
-           t.stop();
-           callback(elapsed + delay);
-         }, delay, time);
-         return t;
-       }
-
-       var emptyOn = dispatch("start", "end", "cancel", "interrupt");
-       var emptyTween = [];

 
 

-       var CREATED = 0;
-       var SCHEDULED = 1;
-       var STARTING = 2;
-       var STARTED = 3;
-       var RUNNING = 4;
-       var ENDING = 5;
-       var ENDED = 6;
+         projection.stream = function (stream) {
+           return cache && cacheStream === stream ? cache : cache = transformRadians(transformRotate(rotate)(preclip(projectResample(postclip(cacheStream = stream)))));
+         };

 
 

-       function schedule(node, name, id, index, group, timing) {
-         var schedules = node.__transition;
-         if (!schedules) { node.__transition = {}; }
-         else if (id in schedules) { return; }
-         create$7(node, id, {
-           name: name,
-           index: index, // For context during callback.
-           group: group, // For context during callback.
-           on: emptyOn,
-           tween: emptyTween,
-           time: timing.time,
-           delay: timing.delay,
-           duration: timing.duration,
-           ease: timing.ease,
-           timer: null,
-           state: CREATED
-         });
-       }
+         projection.preclip = function (_) {
+           return arguments.length ? (preclip = _, theta = undefined, reset()) : preclip;
+         };

 
 

-       function init(node, id) {
-         var schedule = get$2(node, id);
-         if (schedule.state > CREATED) { throw new Error("too late; already scheduled"); }
-         return schedule;
-       }
+         projection.postclip = function (_) {
+           return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;
+         };

 
 

-       function set$1(node, id) {
-         var schedule = get$2(node, id);
-         if (schedule.state > STARTED) { throw new Error("too late; already running"); }
-         return schedule;
-       }
+         projection.clipAngle = function (_) {
+           return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;
+         };

 
 

-       function get$2(node, id) {
-         var schedule = node.__transition;
-         if (!schedule || !(schedule = schedule[id])) { throw new Error("transition not found"); }
-         return schedule;
-       }
+         projection.clipExtent = function (_) {
+           return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+         };

 
 

-       function create$7(node, id, self) {
-         var schedules = node.__transition,
-             tween;
+         projection.scale = function (_) {
+           return arguments.length ? (k = +_, recenter()) : k;
+         };

 
 

-         // Initialize the self timer when the transition is created.
-         // Note the actual delay is not known until the first callback!
-         schedules[id] = self;
-         self.timer = timer(schedule, 0, self.time);
+         projection.translate = function (_) {
+           return arguments.length ? (x = +_[0], y = +_[1], recenter()) : [x, y];
+         };

 
 

-         function schedule(elapsed) {
-           self.state = SCHEDULED;
-           self.timer.restart(start, self.delay, self.time);
+         projection.center = function (_) {
+           return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];
+         };

 
 

-           // If the elapsed delay is less than our first sleep, start immediately.
-           if (self.delay <= elapsed) { start(elapsed - self.delay); }
-         }
+         projection.rotate = function (_) {
+           return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];
+         };

 
 

-         function start(elapsed) {
-           var i, j, n, o;
+         projection.angle = function (_) {
+           return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees$1;
+         };

 
 

-           // If the state is not SCHEDULED, then we previously errored on start.
-           if (self.state !== SCHEDULED) { return stop(); }
+         projection.reflectX = function (_) {
+           return arguments.length ? (sx = _ ? -1 : 1, recenter()) : sx < 0;
+         };

 
 

-           for (i in schedules) {
-             o = schedules[i];
-             if (o.name !== self.name) { continue; }
+         projection.reflectY = function (_) {
+           return arguments.length ? (sy = _ ? -1 : 1, recenter()) : sy < 0;
+         };

 
 

-             // While this element already has a starting transition during this frame,
-             // defer starting an interrupting transition until that transition has a
-             // chance to tick (and possibly end); see d3/d3-transition#54!
-             if (o.state === STARTED) { return d3_timeout(start); }
+         projection.precision = function (_) {
+           return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
+         };

 
 

-             // Interrupt the active transition, if any.
-             if (o.state === RUNNING) {
-               o.state = ENDED;
-               o.timer.stop();
-               o.on.call("interrupt", node, node.__data__, o.index, o.group);
-               delete schedules[i];
-             }
+         projection.fitExtent = function (extent, object) {
+           return fitExtent(projection, extent, object);
+         };

 
 

-             // Cancel any pre-empted transitions.
-             else if (+i < id) {
-               o.state = ENDED;
-               o.timer.stop();
-               o.on.call("cancel", node, node.__data__, o.index, o.group);
-               delete schedules[i];
-             }
-           }
+         projection.fitSize = function (size, object) {
+           return fitSize(projection, size, object);
+         };

 
 

-           // Defer the first tick to end of the current frame; see d3/d3#1576.
-           // Note the transition may be canceled after start and before the first tick!
-           // Note this must be scheduled before the start event; see d3/d3-transition#16!
-           // Assuming this is successful, subsequent callbacks go straight to tick.
-           d3_timeout(function() {
-             if (self.state === STARTED) {
-               self.state = RUNNING;
-               self.timer.restart(tick, self.delay, self.time);
-               tick(elapsed);
-             }
-           });
+         projection.fitWidth = function (width, object) {
+           return fitWidth(projection, width, object);
+         };

 
 

-           // Dispatch the start event.
-           // Note this must be done before the tween are initialized.
-           self.state = STARTING;
-           self.on.call("start", node, node.__data__, self.index, self.group);
-           if (self.state !== STARTING) { return; } // interrupted
-           self.state = STARTED;
+         projection.fitHeight = function (height, object) {
+           return fitHeight(projection, height, object);
+         };

 
 

-           // Initialize the tween, deleting null tween.
-           tween = new Array(n = self.tween.length);
-           for (i = 0, j = -1; i < n; ++i) {
-             if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
-               tween[++j] = o;
-             }
-           }
-           tween.length = j + 1;
+         function recenter() {
+           var center = scaleTranslateRotate(k, 0, 0, sx, sy, alpha).apply(null, project(lambda, phi)),
+               transform = scaleTranslateRotate(k, x - center[0], y - center[1], sx, sy, alpha);
+           rotate = rotateRadians(deltaLambda, deltaPhi, deltaGamma);
+           projectTransform = compose(project, transform);
+           projectRotateTransform = compose(rotate, projectTransform);
+           projectResample = resample(projectTransform, delta2);
+           return reset();

          }
 
          }
 

-         function tick(elapsed) {
-           var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
-               i = -1,
-               n = tween.length;
-
-           while (++i < n) {
-             tween[i].call(node, t);
-           }
-
-           // Dispatch the end event.
-           if (self.state === ENDING) {
-             self.on.call("end", node, node.__data__, self.index, self.group);
-             stop();
-           }
+         function reset() {
+           cache = cacheStream = null;
+           return projection;

          }
 
          }
 

-         function stop() {
-           self.state = ENDED;
-           self.timer.stop();
-           delete schedules[id];
-           for (var i in schedules) { return; } // eslint-disable-line no-unused-vars
-           delete node.__transition;
-         }
+         return function () {
+           project = projectAt.apply(this, arguments);
+           projection.invert = project.invert && invert;
+           return recenter();
+         };

        }
 
        }
 

-       function interrupt(node, name) {
-         var schedules = node.__transition,
-             schedule,
-             active,
-             empty = true,
-             i;
-
-         if (!schedules) { return; }
-
-         name = name == null ? null : name + "";
-
-         for (i in schedules) {
-           if ((schedule = schedules[i]).name !== name) { empty = false; continue; }
-           active = schedule.state > STARTING && schedule.state < ENDING;
-           schedule.state = ENDED;
-           schedule.timer.stop();
-           schedule.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule.index, schedule.group);
-           delete schedules[i];
-         }
-
-         if (empty) { delete node.__transition; }
+       function mercatorRaw(lambda, phi) {
+         return [lambda, log$1(tan((halfPi + phi) / 2))];

        }
 
        }
 

-       function selection_interrupt(name) {
-         return this.each(function() {
-           interrupt(this, name);
-         });
+       mercatorRaw.invert = function (x, y) {
+         return [x, 2 * atan(exp$2(y)) - halfPi];
+       };
+
+       function mercator () {
+         return mercatorProjection(mercatorRaw).scale(961 / tau);

        }
        }

+       function mercatorProjection(project) {
+         var m = projection(project),
+             center = m.center,
+             scale = m.scale,
+             translate = m.translate,
+             clipExtent = m.clipExtent,
+             x0 = null,
+             y0,
+             x1,
+             y1; // clip extent

 
 

-       function tweenRemove(id, name) {
-         var tween0, tween1;
-         return function() {
-           var schedule = set$1(this, id),
-               tween = schedule.tween;
+         m.scale = function (_) {
+           return arguments.length ? (scale(_), reclip()) : scale();
+         };

 
 

-           // If this node shared tween with the previous node,
-           // just assign the updated shared tween and we’re done!
-           // Otherwise, copy-on-write.
-           if (tween !== tween0) {
-             tween1 = tween0 = tween;
-             for (var i = 0, n = tween1.length; i < n; ++i) {
-               if (tween1[i].name === name) {
-                 tween1 = tween1.slice();
-                 tween1.splice(i, 1);
-                 break;
-               }
-             }
-           }
+         m.translate = function (_) {
+           return arguments.length ? (translate(_), reclip()) : translate();
+         };

 
 

-           schedule.tween = tween1;
+         m.center = function (_) {
+           return arguments.length ? (center(_), reclip()) : center();

          };
          };

-       }

 
 

-       function tweenFunction(id, name, value) {
-         var tween0, tween1;
-         if (typeof value !== "function") { throw new Error; }
-         return function() {
-           var schedule = set$1(this, id),
-               tween = schedule.tween;
+         m.clipExtent = function (_) {
+           return arguments.length ? (_ == null ? x0 = y0 = x1 = y1 = null : (x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reclip()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+         };

 
 

-           // If this node shared tween with the previous node,
-           // just assign the updated shared tween and we’re done!
-           // Otherwise, copy-on-write.
-           if (tween !== tween0) {
-             tween1 = (tween0 = tween).slice();
-             for (var t = {name: name, value: value}, i = 0, n = tween1.length; i < n; ++i) {
-               if (tween1[i].name === name) {
-                 tween1[i] = t;
-                 break;
-               }
-             }
-             if (i === n) { tween1.push(t); }
-           }
+         function reclip() {
+           var k = pi * scale(),
+               t = m(rotation(m.rotate()).invert([0, 0]));
+           return clipExtent(x0 == null ? [[t[0] - k, t[1] - k], [t[0] + k, t[1] + k]] : project === mercatorRaw ? [[Math.max(t[0] - k, x0), y0], [Math.min(t[0] + k, x1), y1]] : [[x0, Math.max(t[1] - k, y0)], [x1, Math.min(t[1] + k, y1)]]);
+         }

 
 

-           schedule.tween = tween1;
-         };
+         return reclip();

        }
 
        }
 

-       function transition_tween(name, value) {
-         var id = this._id;
+       function d3_geoIdentity () {
+         var k = 1,
+             tx = 0,
+             ty = 0,
+             sx = 1,
+             sy = 1,
+             // scale, translate and reflect
+         alpha = 0,
+             ca,
+             sa,
+             // angle
+         x0 = null,
+             y0,
+             x1,
+             y1,
+             // clip extent
+         kx = 1,
+             ky = 1,
+             transform = transformer$1({
+           point: function point(x, y) {
+             var p = projection([x, y]);
+             this.stream.point(p[0], p[1]);
+           }
+         }),
+             postclip = identity$4,
+             cache,
+             cacheStream;

 
 

-         name += "";
+         function reset() {
+           kx = k * sx;
+           ky = k * sy;
+           cache = cacheStream = null;
+           return projection;
+         }

 
 

-         if (arguments.length < 2) {
-           var tween = get$2(this.node(), id).tween;
-           for (var i = 0, n = tween.length, t; i < n; ++i) {
-             if ((t = tween[i]).name === name) {
-               return t.value;
-             }
+         function projection(p) {
+           var x = p[0] * kx,
+               y = p[1] * ky;
+
+           if (alpha) {
+             var t = y * ca - x * sa;
+             x = x * ca + y * sa;
+             y = t;

            }
            }

-           return null;
-         }

 
 

-         return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
-       }
+           return [x + tx, y + ty];
+         }

 
 

-       function tweenValue(transition, name, value) {
-         var id = transition._id;
+         projection.invert = function (p) {
+           var x = p[0] - tx,
+               y = p[1] - ty;

 
 

-         transition.each(function() {
-           var schedule = set$1(this, id);
-           (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
-         });
+           if (alpha) {
+             var t = y * ca + x * sa;
+             x = x * ca - y * sa;
+             y = t;
+           }

 
 

-         return function(node) {
-           return get$2(node, id).value[name];
+           return [x / kx, y / ky];

          };
          };

-       }

 
 

-       function interpolate$1(a, b) {
-         var c;
-         return (typeof b === "number" ? d3_interpolateNumber
-             : b instanceof color ? d3_interpolateRgb
-             : (c = color(b)) ? (b = c, d3_interpolateRgb)
-             : interpolateString)(a, b);
-       }
+         projection.stream = function (stream) {
+           return cache && cacheStream === stream ? cache : cache = transform(postclip(cacheStream = stream));
+         };

 
 

-       function attrRemove$1(name) {
-         return function() {
-           this.removeAttribute(name);
+         projection.postclip = function (_) {
+           return arguments.length ? (postclip = _, x0 = y0 = x1 = y1 = null, reset()) : postclip;

          };
          };

-       }

 
 

-       function attrRemoveNS$1(fullname) {
-         return function() {
-           this.removeAttributeNS(fullname.space, fullname.local);
+         projection.clipExtent = function (_) {
+           return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];

          };
          };

-       }

 
 

-       function attrConstant$1(name, interpolate, value1) {
-         var string00,
-             string1 = value1 + "",
-             interpolate0;
-         return function() {
-           var string0 = this.getAttribute(name);
-           return string0 === string1 ? null
-               : string0 === string00 ? interpolate0
-               : interpolate0 = interpolate(string00 = string0, value1);
+         projection.scale = function (_) {
+           return arguments.length ? (k = +_, reset()) : k;

          };
          };

-       }

 
 

-       function attrConstantNS$1(fullname, interpolate, value1) {
-         var string00,
-             string1 = value1 + "",
-             interpolate0;
-         return function() {
-           var string0 = this.getAttributeNS(fullname.space, fullname.local);
-           return string0 === string1 ? null
-               : string0 === string00 ? interpolate0
-               : interpolate0 = interpolate(string00 = string0, value1);
+         projection.translate = function (_) {
+           return arguments.length ? (tx = +_[0], ty = +_[1], reset()) : [tx, ty];

          };
          };

-       }

 
 

-       function attrFunction$1(name, interpolate, value) {
-         var string00,
-             string10,
-             interpolate0;
-         return function() {
-           var string0, value1 = value(this), string1;
-           if (value1 == null) { return void this.removeAttribute(name); }
-           string0 = this.getAttribute(name);
-           string1 = value1 + "";
-           return string0 === string1 ? null
-               : string0 === string00 && string1 === string10 ? interpolate0
-               : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+         projection.angle = function (_) {
+           return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees$1;

          };
          };

-       }

 
 

-       function attrFunctionNS$1(fullname, interpolate, value) {
-         var string00,
-             string10,
-             interpolate0;
-         return function() {
-           var string0, value1 = value(this), string1;
-           if (value1 == null) { return void this.removeAttributeNS(fullname.space, fullname.local); }
-           string0 = this.getAttributeNS(fullname.space, fullname.local);
-           string1 = value1 + "";
-           return string0 === string1 ? null
-               : string0 === string00 && string1 === string10 ? interpolate0
-               : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+         projection.reflectX = function (_) {
+           return arguments.length ? (sx = _ ? -1 : 1, reset()) : sx < 0;

          };
          };

-       }

 
 

-       function transition_attr(name, value) {
-         var fullname = namespace(name), i = fullname === "transform" ? interpolateTransformSvg : interpolate$1;
-         return this.attrTween(name, typeof value === "function"
-             ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value))
-             : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname)
-             : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value));
-       }
+         projection.reflectY = function (_) {
+           return arguments.length ? (sy = _ ? -1 : 1, reset()) : sy < 0;
+         };

 
 

-       function attrInterpolate(name, i) {
-         return function(t) {
-           this.setAttribute(name, i.call(this, t));
+         projection.fitExtent = function (extent, object) {
+           return fitExtent(projection, extent, object);

          };
          };

-       }

 
 

-       function attrInterpolateNS(fullname, i) {
-         return function(t) {
-           this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
+         projection.fitSize = function (size, object) {
+           return fitSize(projection, size, object);

          };
          };

-       }

 
 

-       function attrTweenNS(fullname, value) {
-         var t0, i0;
-         function tween() {
-           var i = value.apply(this, arguments);
-           if (i !== i0) { t0 = (i0 = i) && attrInterpolateNS(fullname, i); }
-           return t0;
-         }
-         tween._value = value;
-         return tween;
-       }
+         projection.fitWidth = function (width, object) {
+           return fitWidth(projection, width, object);
+         };

 
 

-       function attrTween(name, value) {
-         var t0, i0;
-         function tween() {
-           var i = value.apply(this, arguments);
-           if (i !== i0) { t0 = (i0 = i) && attrInterpolate(name, i); }
-           return t0;
-         }
-         tween._value = value;
-         return tween;
-       }
+         projection.fitHeight = function (height, object) {
+           return fitHeight(projection, height, object);
+         };

 
 

-       function transition_attrTween(name, value) {
-         var key = "attr." + name;
-         if (arguments.length < 2) { return (key = this.tween(key)) && key._value; }
-         if (value == null) { return this.tween(key, null); }
-         if (typeof value !== "function") { throw new Error; }
-         var fullname = namespace(name);
-         return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
+         return projection;

        }
 
        }
 

-       function delayFunction(id, value) {
-         return function() {
-           init(this, id).delay = +value.apply(this, arguments);
-         };
+       // constants
+       var TAU = 2 * Math.PI;
+       var EQUATORIAL_RADIUS = 6356752.314245179;
+       var POLAR_RADIUS = 6378137.0;
+       function geoLatToMeters(dLat) {
+         return dLat * (TAU * POLAR_RADIUS / 360);

        }
        }

-
-       function delayConstant(id, value) {
-         return value = +value, function() {
-           init(this, id).delay = value;
-         };
+       function geoLonToMeters(dLon, atLat) {
+         return Math.abs(atLat) >= 90 ? 0 : dLon * (TAU * EQUATORIAL_RADIUS / 360) * Math.abs(Math.cos(atLat * (Math.PI / 180)));

        }
        }

-
-       function transition_delay(value) {
-         var id = this._id;
-
-         return arguments.length
-             ? this.each((typeof value === "function"
-                 ? delayFunction
-                 : delayConstant)(id, value))
-             : get$2(this.node(), id).delay;
+       function geoMetersToLat(m) {
+         return m / (TAU * POLAR_RADIUS / 360);

        }
        }

-
-       function durationFunction(id, value) {
-         return function() {
-           set$1(this, id).duration = +value.apply(this, arguments);
-         };
+       function geoMetersToLon(m, atLat) {
+         return Math.abs(atLat) >= 90 ? 0 : m / (TAU * EQUATORIAL_RADIUS / 360) / Math.abs(Math.cos(atLat * (Math.PI / 180)));

        }
        }

-
-       function durationConstant(id, value) {
-         return value = +value, function() {
-           set$1(this, id).duration = value;
-         };
+       function geoMetersToOffset(meters, tileSize) {
+         tileSize = tileSize || 256;
+         return [meters[0] * tileSize / (TAU * EQUATORIAL_RADIUS), -meters[1] * tileSize / (TAU * POLAR_RADIUS)];

        }
        }

+       function geoOffsetToMeters(offset, tileSize) {
+         tileSize = tileSize || 256;
+         return [offset[0] * TAU * EQUATORIAL_RADIUS / tileSize, -offset[1] * TAU * POLAR_RADIUS / tileSize];
+       } // Equirectangular approximation of spherical distances on Earth

 
 

-       function transition_duration(value) {
-         var id = this._id;
-
-         return arguments.length
-             ? this.each((typeof value === "function"
-                 ? durationFunction
-                 : durationConstant)(id, value))
-             : get$2(this.node(), id).duration;
-       }
+       function geoSphericalDistance(a, b) {
+         var x = geoLonToMeters(a[0] - b[0], (a[1] + b[1]) / 2);
+         var y = geoLatToMeters(a[1] - b[1]);
+         return Math.sqrt(x * x + y * y);
+       } // scale to zoom

 
 

-       function easeConstant(id, value) {
-         if (typeof value !== "function") { throw new Error; }
-         return function() {
-           set$1(this, id).ease = value;
-         };
-       }
+       function geoScaleToZoom(k, tileSize) {
+         tileSize = tileSize || 256;
+         var log2ts = Math.log(tileSize) * Math.LOG2E;
+         return Math.log(k * TAU) / Math.LN2 - log2ts;
+       } // zoom to scale

 
 

-       function transition_ease(value) {
-         var id = this._id;
+       function geoZoomToScale(z, tileSize) {
+         tileSize = tileSize || 256;
+         return tileSize * Math.pow(2, z) / TAU;
+       } // returns info about the node from `nodes` closest to the given `point`

 
 

-         return arguments.length
-             ? this.each(easeConstant(id, value))
-             : get$2(this.node(), id).ease;
-       }
+       function geoSphericalClosestNode(nodes, point) {
+         var minDistance = Infinity,
+             distance;
+         var indexOfMin;

 
 

-       function transition_filter(match) {
-         if (typeof match !== "function") { match = matcher(match); }
+         for (var i in nodes) {
+           distance = geoSphericalDistance(nodes[i].loc, point);

 
 

-         for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-           for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
-             if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
-               subgroup.push(node);
-             }
+           if (distance < minDistance) {
+             minDistance = distance;
+             indexOfMin = i;

            }
          }
 
            }
          }
 

-         return new Transition(subgroups, this._parents, this._name, this._id);
+         if (indexOfMin !== undefined) {
+           return {
+             index: indexOfMin,
+             distance: minDistance,
+             node: nodes[indexOfMin]
+           };
+         } else {
+           return null;
+         }

        }
 
        }
 

-       function transition_merge(transition) {
-         if (transition._id !== this._id) { throw new Error; }
-
-         for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
-           for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
-             if (node = group0[i] || group1[i]) {
-               merge[i] = node;
-             }
-           }
+       function geoExtent(min, max) {
+         if (!(this instanceof geoExtent)) {
+           return new geoExtent(min, max);
+         } else if (min instanceof geoExtent) {
+           return min;
+         } else if (min && min.length === 2 && min[0].length === 2 && min[1].length === 2) {
+           this[0] = min[0];
+           this[1] = min[1];
+         } else {
+           this[0] = min || [Infinity, Infinity];
+           this[1] = max || min || [-Infinity, -Infinity];

          }
          }

+       }
+       geoExtent.prototype = new Array(2);
+       Object.assign(geoExtent.prototype, {
+         equals: function equals(obj) {
+           return this[0][0] === obj[0][0] && this[0][1] === obj[0][1] && this[1][0] === obj[1][0] && this[1][1] === obj[1][1];
+         },
+         extend: function extend(obj) {
+           if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+           return geoExtent([Math.min(obj[0][0], this[0][0]), Math.min(obj[0][1], this[0][1])], [Math.max(obj[1][0], this[1][0]), Math.max(obj[1][1], this[1][1])]);
+         },
+         _extend: function _extend(extent) {
+           this[0][0] = Math.min(extent[0][0], this[0][0]);
+           this[0][1] = Math.min(extent[0][1], this[0][1]);
+           this[1][0] = Math.max(extent[1][0], this[1][0]);
+           this[1][1] = Math.max(extent[1][1], this[1][1]);
+         },
+         area: function area() {
+           return Math.abs((this[1][0] - this[0][0]) * (this[1][1] - this[0][1]));
+         },
+         center: function center() {
+           return [(this[0][0] + this[1][0]) / 2, (this[0][1] + this[1][1]) / 2];
+         },
+         rectangle: function rectangle() {
+           return [this[0][0], this[0][1], this[1][0], this[1][1]];
+         },
+         bbox: function bbox() {
+           return {
+             minX: this[0][0],
+             minY: this[0][1],
+             maxX: this[1][0],
+             maxY: this[1][1]
+           };
+         },
+         polygon: function polygon() {
+           return [[this[0][0], this[0][1]], [this[0][0], this[1][1]], [this[1][0], this[1][1]], [this[1][0], this[0][1]], [this[0][0], this[0][1]]];
+         },
+         contains: function contains(obj) {
+           if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+           return obj[0][0] >= this[0][0] && obj[0][1] >= this[0][1] && obj[1][0] <= this[1][0] && obj[1][1] <= this[1][1];
+         },
+         intersects: function intersects(obj) {
+           if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+           return obj[0][0] <= this[1][0] && obj[0][1] <= this[1][1] && obj[1][0] >= this[0][0] && obj[1][1] >= this[0][1];
+         },
+         intersection: function intersection(obj) {
+           if (!this.intersects(obj)) return new geoExtent();
+           return new geoExtent([Math.max(obj[0][0], this[0][0]), Math.max(obj[0][1], this[0][1])], [Math.min(obj[1][0], this[1][0]), Math.min(obj[1][1], this[1][1])]);
+         },
+         percentContainedIn: function percentContainedIn(obj) {
+           if (!(obj instanceof geoExtent)) obj = new geoExtent(obj);
+           var a1 = this.intersection(obj).area();
+           var a2 = this.area();
+
+           if (a1 === Infinity || a2 === Infinity) {
+             return 0;
+           } else if (a1 === 0 || a2 === 0) {
+             if (obj.contains(this)) {
+               return 1;
+             }

 
 

-         for (; j < m0; ++j) {
-           merges[j] = groups0[j];
+             return 0;
+           } else {
+             return a1 / a2;
+           }
+         },
+         padByMeters: function padByMeters(meters) {
+           var dLat = geoMetersToLat(meters);
+           var dLon = geoMetersToLon(meters, this.center()[1]);
+           return geoExtent([this[0][0] - dLon, this[0][1] - dLat], [this[1][0] + dLon, this[1][1] + dLat]);
+         },
+         toParam: function toParam() {
+           return this.rectangle().join(',');

          }
          }

+       });

 
 

-         return new Transition(merges, this._parents, this._name, this._id);
-       }
-
-       function start(name) {
-         return (name + "").trim().split(/^|\s+/).every(function(t) {
-           var i = t.indexOf(".");
-           if (i >= 0) { t = t.slice(0, i); }
-           return !t || t === "start";
-         });
-       }
+       var $$p = _export;
+       var $every = arrayIteration.every;
+       var arrayMethodIsStrict$1 = arrayMethodIsStrict$8;

 
 

-       function onFunction(id, name, listener) {
-         var on0, on1, sit = start(name) ? init : set$1;
-         return function() {
-           var schedule = sit(this, id),
-               on = schedule.on;
+       var STRICT_METHOD$1 = arrayMethodIsStrict$1('every');

 
 

-           // If this node shared a dispatch with the previous node,
-           // just assign the updated shared dispatch and we’re done!
-           // Otherwise, copy-on-write.
-           if (on !== on0) { (on1 = (on0 = on).copy()).on(name, listener); }
+       // `Array.prototype.every` method
+       // https://tc39.es/ecma262/#sec-array.prototype.every
+       $$p({ target: 'Array', proto: true, forced: !STRICT_METHOD$1 }, {
+         every: function every(callbackfn /* , thisArg */) {
+           return $every(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });

 
 

-           schedule.on = on1;
-         };
-       }
+       var $$o = _export;
+       var $reduce = arrayReduce.left;
+       var arrayMethodIsStrict = arrayMethodIsStrict$8;
+       var CHROME_VERSION = engineV8Version;
+       var IS_NODE = engineIsNode;

 
 

-       function transition_on(name, listener) {
-         var id = this._id;
+       var STRICT_METHOD = arrayMethodIsStrict('reduce');
+       // Chrome 80-82 has a critical bug
+       // https://bugs.chromium.org/p/chromium/issues/detail?id=1049982
+       var CHROME_BUG = !IS_NODE && CHROME_VERSION > 79 && CHROME_VERSION < 83;

 
 

-         return arguments.length < 2
-             ? get$2(this.node(), id).on.on(name)
-             : this.each(onFunction(id, name, listener));
-       }
+       // `Array.prototype.reduce` method
+       // https://tc39.es/ecma262/#sec-array.prototype.reduce
+       $$o({ target: 'Array', proto: true, forced: !STRICT_METHOD || CHROME_BUG }, {
+         reduce: function reduce(callbackfn /* , initialValue */) {
+           return $reduce(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });

 
 

-       function removeFunction(id) {
-         return function() {
-           var parent = this.parentNode;
-           for (var i in this.__transition) { if (+i !== id) { return; } }
-           if (parent) { parent.removeChild(this); }
-         };
-       }
+       function d3_polygonArea (polygon) {
+         var i = -1,
+             n = polygon.length,
+             a,
+             b = polygon[n - 1],
+             area = 0;

 
 

-       function transition_remove() {
-         return this.on("end.remove", removeFunction(this._id));
-       }
+         while (++i < n) {
+           a = b;
+           b = polygon[i];
+           area += a[1] * b[0] - a[0] * b[1];
+         }

 
 

-       function transition_select(select) {
-         var name = this._name,
-             id = this._id;
+         return area / 2;
+       }

 
 

-         if (typeof select !== "function") { select = selector(select); }
+       function d3_polygonCentroid (polygon) {
+         var i = -1,
+             n = polygon.length,
+             x = 0,
+             y = 0,
+             a,
+             b = polygon[n - 1],
+             c,
+             k = 0;

 
 

-         for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
-           for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
-             if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
-               if ("__data__" in node) { subnode.__data__ = node.__data__; }
-               subgroup[i] = subnode;
-               schedule(subgroup[i], name, id, i, subgroup, get$2(node, id));
-             }
-           }
+         while (++i < n) {
+           a = b;
+           b = polygon[i];
+           k += c = a[0] * b[1] - b[0] * a[1];
+           x += (a[0] + b[0]) * c;
+           y += (a[1] + b[1]) * c;

          }
 
          }
 

-         return new Transition(subgroups, this._parents, name, id);
+         return k *= 3, [x / k, y / k];

        }
 
        }
 

-       function transition_selectAll(select) {
-         var name = this._name,
-             id = this._id;
+       // Returns the 2D cross product of AB and AC vectors, i.e., the z-component of
+       // the 3D cross product in a quadrant I Cartesian coordinate system (+x is
+       // right, +y is up). Returns a positive value if ABC is counter-clockwise,
+       // negative if clockwise, and zero if the points are collinear.
+       function cross (a, b, c) {
+         return (b[0] - a[0]) * (c[1] - a[1]) - (b[1] - a[1]) * (c[0] - a[0]);
+       }

 
 

-         if (typeof select !== "function") { select = selectorAll(select); }
+       function lexicographicOrder(a, b) {
+         return a[0] - b[0] || a[1] - b[1];
+       } // Computes the upper convex hull per the monotone chain algorithm.
+       // Assumes points.length >= 3, is sorted by x, unique in y.
+       // Returns an array of indices into points in left-to-right order.

 
 

-         for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
-           for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-             if (node = group[i]) {
-               for (var children = select.call(node, node.__data__, i, group), child, inherit = get$2(node, id), k = 0, l = children.length; k < l; ++k) {
-                 if (child = children[k]) {
-                   schedule(child, name, id, k, children, inherit);
-                 }
-               }
-               subgroups.push(children);
-               parents.push(node);
-             }
+
+       function computeUpperHullIndexes(points) {
+         var n = points.length,
+             indexes = [0, 1];
+         var size = 2,
+             i;
+
+         for (i = 2; i < n; ++i) {
+           while (size > 1 && cross(points[indexes[size - 2]], points[indexes[size - 1]], points[i]) <= 0) {
+             --size;

            }
            }

+
+           indexes[size++] = i;

          }
 
          }
 

-         return new Transition(subgroups, parents, name, id);
+         return indexes.slice(0, size); // remove popped points

        }
 
        }
 

-       var Selection$1 = selection.prototype.constructor;
+       function d3_polygonHull (points) {
+         if ((n = points.length) < 3) return null;
+         var i,
+             n,
+             sortedPoints = new Array(n),
+             flippedPoints = new Array(n);

 
 

-       function transition_selection() {
-         return new Selection$1(this._groups, this._parents);
-       }
+         for (i = 0; i < n; ++i) {
+           sortedPoints[i] = [+points[i][0], +points[i][1], i];
+         }

 
 

-       function styleNull(name, interpolate) {
-         var string00,
-             string10,
-             interpolate0;
-         return function() {
-           var string0 = styleValue(this, name),
-               string1 = (this.style.removeProperty(name), styleValue(this, name));
-           return string0 === string1 ? null
-               : string0 === string00 && string1 === string10 ? interpolate0
-               : interpolate0 = interpolate(string00 = string0, string10 = string1);
-         };
-       }
+         sortedPoints.sort(lexicographicOrder);

 
 

-       function styleRemove$1(name) {
-         return function() {
-           this.style.removeProperty(name);
-         };
-       }
+         for (i = 0; i < n; ++i) {
+           flippedPoints[i] = [sortedPoints[i][0], -sortedPoints[i][1]];
+         }

 
 

-       function styleConstant$1(name, interpolate, value1) {
-         var string00,
-             string1 = value1 + "",
-             interpolate0;
-         return function() {
-           var string0 = styleValue(this, name);
-           return string0 === string1 ? null
-               : string0 === string00 ? interpolate0
-               : interpolate0 = interpolate(string00 = string0, value1);
-         };
-       }
+         var upperIndexes = computeUpperHullIndexes(sortedPoints),
+             lowerIndexes = computeUpperHullIndexes(flippedPoints); // Construct the hull polygon, removing possible duplicate endpoints.

 
 

-       function styleFunction$1(name, interpolate, value) {
-         var string00,
-             string10,
-             interpolate0;
-         return function() {
-           var string0 = styleValue(this, name),
-               value1 = value(this),
-               string1 = value1 + "";
-           if (value1 == null) { string1 = value1 = (this.style.removeProperty(name), styleValue(this, name)); }
-           return string0 === string1 ? null
-               : string0 === string00 && string1 === string10 ? interpolate0
-               : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
-         };
-       }
+         var skipLeft = lowerIndexes[0] === upperIndexes[0],
+             skipRight = lowerIndexes[lowerIndexes.length - 1] === upperIndexes[upperIndexes.length - 1],
+             hull = []; // Add upper hull in right-to-l order.
+         // Then add lower hull in left-to-right order.

 
 

-       function styleMaybeRemove(id, name) {
-         var on0, on1, listener0, key = "style." + name, event = "end." + key, remove;
-         return function() {
-           var schedule = set$1(this, id),
-               on = schedule.on,
-               listener = schedule.value[key] == null ? remove || (remove = styleRemove$1(name)) : undefined;
+         for (i = upperIndexes.length - 1; i >= 0; --i) {
+           hull.push(points[sortedPoints[upperIndexes[i]][2]]);
+         }

 
 

-           // If this node shared a dispatch with the previous node,
-           // just assign the updated shared dispatch and we’re done!
-           // Otherwise, copy-on-write.
-           if (on !== on0 || listener0 !== listener) { (on1 = (on0 = on).copy()).on(event, listener0 = listener); }
+         for (i = +skipLeft; i < lowerIndexes.length - skipRight; ++i) {
+           hull.push(points[sortedPoints[lowerIndexes[i]][2]]);
+         }

 
 

-           schedule.on = on1;
-         };
+         return hull;

        }
 
        }
 

-       function transition_style(name, value, priority) {
-         var i = (name += "") === "transform" ? interpolateTransformCss : interpolate$1;
-         return value == null ? this
-             .styleTween(name, styleNull(name, i))
-             .on("end.style." + name, styleRemove$1(name))
-           : typeof value === "function" ? this
-             .styleTween(name, styleFunction$1(name, i, tweenValue(this, "style." + name, value)))
-             .each(styleMaybeRemove(this._id, name))
-           : this
-             .styleTween(name, styleConstant$1(name, i, value), priority)
-             .on("end.style." + name, null);
-       }
+       // vector equals
+       function geoVecEqual(a, b, epsilon) {
+         if (epsilon) {
+           return Math.abs(a[0] - b[0]) <= epsilon && Math.abs(a[1] - b[1]) <= epsilon;
+         } else {
+           return a[0] === b[0] && a[1] === b[1];
+         }
+       } // vector addition

 
 

-       function styleInterpolate(name, i, priority) {
-         return function(t) {
-           this.style.setProperty(name, i.call(this, t), priority);
-         };
-       }
+       function geoVecAdd(a, b) {
+         return [a[0] + b[0], a[1] + b[1]];
+       } // vector subtraction

 
 

-       function styleTween(name, value, priority) {
-         var t, i0;
-         function tween() {
-           var i = value.apply(this, arguments);
-           if (i !== i0) { t = (i0 = i) && styleInterpolate(name, i, priority); }
-           return t;
-         }
-         tween._value = value;
-         return tween;
-       }
+       function geoVecSubtract(a, b) {
+         return [a[0] - b[0], a[1] - b[1]];
+       } // vector scaling

 
 

-       function transition_styleTween(name, value, priority) {
-         var key = "style." + (name += "");
-         if (arguments.length < 2) { return (key = this.tween(key)) && key._value; }
-         if (value == null) { return this.tween(key, null); }
-         if (typeof value !== "function") { throw new Error; }
-         return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
-       }
+       function geoVecScale(a, mag) {
+         return [a[0] * mag, a[1] * mag];
+       } // vector rounding (was: geoRoundCoordinates)

 
 

-       function textConstant$1(value) {
-         return function() {
-           this.textContent = value;
-         };
-       }
+       function geoVecFloor(a) {
+         return [Math.floor(a[0]), Math.floor(a[1])];
+       } // linear interpolation

 
 

-       function textFunction$1(value) {
-         return function() {
-           var value1 = value(this);
-           this.textContent = value1 == null ? "" : value1;
-         };
-       }
+       function geoVecInterp(a, b, t) {
+         return [a[0] + (b[0] - a[0]) * t, a[1] + (b[1] - a[1]) * t];
+       } // http://jsperf.com/id-dist-optimization

 
 

-       function transition_text(value) {
-         return this.tween("text", typeof value === "function"
-             ? textFunction$1(tweenValue(this, "text", value))
-             : textConstant$1(value == null ? "" : value + ""));
-       }
+       function geoVecLength(a, b) {
+         return Math.sqrt(geoVecLengthSquare(a, b));
+       } // length of vector raised to the power two

 
 

-       function textInterpolate(i) {
-         return function(t) {
-           this.textContent = i.call(this, t);
-         };
-       }
+       function geoVecLengthSquare(a, b) {
+         b = b || [0, 0];
+         var x = a[0] - b[0];
+         var y = a[1] - b[1];
+         return x * x + y * y;
+       } // get a unit vector

 
 

-       function textTween(value) {
-         var t0, i0;
-         function tween() {
-           var i = value.apply(this, arguments);
-           if (i !== i0) { t0 = (i0 = i) && textInterpolate(i); }
-           return t0;
+       function geoVecNormalize(a) {
+         var length = Math.sqrt(a[0] * a[0] + a[1] * a[1]);
+
+         if (length !== 0) {
+           return geoVecScale(a, 1 / length);

          }
          }

-         tween._value = value;
-         return tween;
-       }

 
 

-       function transition_textTween(value) {
-         var key = "text";
-         if (arguments.length < 1) { return (key = this.tween(key)) && key._value; }
-         if (value == null) { return this.tween(key, null); }
-         if (typeof value !== "function") { throw new Error; }
-         return this.tween(key, textTween(value));
-       }
+         return [0, 0];
+       } // Return the counterclockwise angle in the range (-pi, pi)
+       // between the positive X axis and the line intersecting a and b.

 
 

-       function transition_transition() {
-         var name = this._name,
-             id0 = this._id,
-             id1 = newId();
+       function geoVecAngle(a, b) {
+         return Math.atan2(b[1] - a[1], b[0] - a[0]);
+       } // dot product

 
 

-         for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
-           for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-             if (node = group[i]) {
-               var inherit = get$2(node, id0);
-               schedule(node, name, id1, i, group, {
-                 time: inherit.time + inherit.delay + inherit.duration,
-                 delay: 0,
-                 duration: inherit.duration,
-                 ease: inherit.ease
-               });
-             }
+       function geoVecDot(a, b, origin) {
+         origin = origin || [0, 0];
+         var p = geoVecSubtract(a, origin);
+         var q = geoVecSubtract(b, origin);
+         return p[0] * q[0] + p[1] * q[1];
+       } // normalized dot product
+
+       function geoVecNormalizedDot(a, b, origin) {
+         origin = origin || [0, 0];
+         var p = geoVecNormalize(geoVecSubtract(a, origin));
+         var q = geoVecNormalize(geoVecSubtract(b, origin));
+         return geoVecDot(p, q);
+       } // 2D cross product of OA and OB vectors, returns magnitude of Z vector
+       // Returns a positive value, if OAB makes a counter-clockwise turn,
+       // negative for clockwise turn, and zero if the points are collinear.
+
+       function geoVecCross(a, b, origin) {
+         origin = origin || [0, 0];
+         var p = geoVecSubtract(a, origin);
+         var q = geoVecSubtract(b, origin);
+         return p[0] * q[1] - p[1] * q[0];
+       } // find closest orthogonal projection of point onto points array
+
+       function geoVecProject(a, points) {
+         var min = Infinity;
+         var idx;
+         var target;
+
+         for (var i = 0; i < points.length - 1; i++) {
+           var o = points[i];
+           var s = geoVecSubtract(points[i + 1], o);
+           var v = geoVecSubtract(a, o);
+           var proj = geoVecDot(v, s) / geoVecDot(s, s);
+           var p;
+
+           if (proj < 0) {
+             p = o;
+           } else if (proj > 1) {
+             p = points[i + 1];
+           } else {
+             p = [o[0] + proj * s[0], o[1] + proj * s[1]];
+           }
+
+           var dist = geoVecLength(p, a);
+
+           if (dist < min) {
+             min = dist;
+             idx = i + 1;
+             target = p;

            }
          }
 
            }
          }
 

-         return new Transition(groups, this._parents, name, id1);
+         if (idx !== undefined) {
+           return {
+             index: idx,
+             distance: min,
+             target: target
+           };
+         } else {
+           return null;
+         }

        }
 
        }
 

-       function transition_end() {
-         var on0, on1, that = this, id = that._id, size = that.size();
-         return new Promise(function(resolve, reject) {
-           var cancel = {value: reject},
-               end = {value: function() { if (--size === 0) { resolve(); } }};
+       // between the positive X axis and the line intersecting a and b.

 
 

-           that.each(function() {
-             var schedule = set$1(this, id),
-                 on = schedule.on;
+       function geoAngle(a, b, projection) {
+         return geoVecAngle(projection(a.loc), projection(b.loc));
+       }
+       function geoEdgeEqual(a, b) {
+         return a[0] === b[0] && a[1] === b[1] || a[0] === b[1] && a[1] === b[0];
+       } // Rotate all points counterclockwise around a pivot point by given angle

 
 

-             // If this node shared a dispatch with the previous node,
-             // just assign the updated shared dispatch and we’re done!
-             // Otherwise, copy-on-write.
-             if (on !== on0) {
-               on1 = (on0 = on).copy();
-               on1._.cancel.push(cancel);
-               on1._.interrupt.push(cancel);
-               on1._.end.push(end);
-             }
+       function geoRotate(points, angle, around) {
+         return points.map(function (point) {
+           var radial = geoVecSubtract(point, around);
+           return [radial[0] * Math.cos(angle) - radial[1] * Math.sin(angle) + around[0], radial[0] * Math.sin(angle) + radial[1] * Math.cos(angle) + around[1]];
+         });
+       } // Choose the edge with the minimal distance from `point` to its orthogonal
+       // projection onto that edge, if such a projection exists, or the distance to
+       // the closest vertex on that edge. Returns an object with the `index` of the
+       // chosen edge, the chosen `loc` on that edge, and the `distance` to to it.

 
 

-             schedule.on = on1;
-           });
+       function geoChooseEdge(nodes, point, projection, activeID) {
+         var dist = geoVecLength;
+         var points = nodes.map(function (n) {
+           return projection(n.loc);

          });
          });

-       }
+         var ids = nodes.map(function (n) {
+           return n.id;
+         });
+         var min = Infinity;
+         var idx;
+         var loc;
+
+         for (var i = 0; i < points.length - 1; i++) {
+           if (ids[i] === activeID || ids[i + 1] === activeID) continue;
+           var o = points[i];
+           var s = geoVecSubtract(points[i + 1], o);
+           var v = geoVecSubtract(point, o);
+           var proj = geoVecDot(v, s) / geoVecDot(s, s);
+           var p;
+
+           if (proj < 0) {
+             p = o;
+           } else if (proj > 1) {
+             p = points[i + 1];
+           } else {
+             p = [o[0] + proj * s[0], o[1] + proj * s[1]];
+           }

 
 

-       var id$3 = 0;
+           var d = dist(p, point);

 
 

-       function Transition(groups, parents, name, id) {
-         this._groups = groups;
-         this._parents = parents;
-         this._name = name;
-         this._id = id;
-       }
+           if (d < min) {
+             min = d;
+             idx = i + 1;
+             loc = projection.invert(p);
+           }
+         }

 
 

-       function transition(name) {
-         return selection().transition(name);
-       }
+         if (idx !== undefined) {
+           return {
+             index: idx,
+             distance: min,
+             loc: loc
+           };
+         } else {
+           return null;
+         }
+       } // Test active (dragged or drawing) segments against inactive segments
+       // This is used to test e.g. multipolygon rings that cross
+       // `activeNodes` is the ring containing the activeID being dragged.
+       // `inactiveNodes` is the other ring to test against

 
 

-       function newId() {
-         return ++id$3;
-       }
+       function geoHasLineIntersections(activeNodes, inactiveNodes, activeID) {
+         var actives = [];
+         var inactives = [];
+         var j, k, n1, n2, segment; // gather active segments (only segments in activeNodes that contain the activeID)

 
 

-       var selection_prototype = selection.prototype;
+         for (j = 0; j < activeNodes.length - 1; j++) {
+           n1 = activeNodes[j];
+           n2 = activeNodes[j + 1];
+           segment = [n1.loc, n2.loc];

 
 

-       Transition.prototype = transition.prototype = {
-         constructor: Transition,
-         select: transition_select,
-         selectAll: transition_selectAll,
-         filter: transition_filter,
-         merge: transition_merge,
-         selection: transition_selection,
-         transition: transition_transition,
-         call: selection_prototype.call,
-         nodes: selection_prototype.nodes,
-         node: selection_prototype.node,
-         size: selection_prototype.size,
-         empty: selection_prototype.empty,
-         each: selection_prototype.each,
-         on: transition_on,
-         attr: transition_attr,
-         attrTween: transition_attrTween,
-         style: transition_style,
-         styleTween: transition_styleTween,
-         text: transition_text,
-         textTween: transition_textTween,
-         remove: transition_remove,
-         tween: transition_tween,
-         delay: transition_delay,
-         duration: transition_duration,
-         ease: transition_ease,
-         end: transition_end
-       };
+           if (n1.id === activeID || n2.id === activeID) {
+             actives.push(segment);
+           }
+         } // gather inactive segments

 
 

-       function linear$1(t) {
-         return +t;
-       }

 
 

-       function cubicInOut(t) {
-         return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
-       }
+         for (j = 0; j < inactiveNodes.length - 1; j++) {
+           n1 = inactiveNodes[j];
+           n2 = inactiveNodes[j + 1];
+           segment = [n1.loc, n2.loc];
+           inactives.push(segment);
+         } // test

 
 

-       var defaultTiming = {
-         time: null, // Set on use.
-         delay: 0,
-         duration: 250,
-         ease: cubicInOut
-       };

 
 

-       function inherit(node, id) {
-         var timing;
-         while (!(timing = node.__transition) || !(timing = timing[id])) {
-           if (!(node = node.parentNode)) {
-             return defaultTiming.time = now(), defaultTiming;
+         for (j = 0; j < actives.length; j++) {
+           for (k = 0; k < inactives.length; k++) {
+             var p = actives[j];
+             var q = inactives[k];
+             var hit = geoLineIntersection(p, q);
+
+             if (hit) {
+               return true;
+             }

            }
          }
            }
          }

-         return timing;
-       }

 
 

-       function selection_transition(name) {
-         var id,
-             timing;
+         return false;
+       } // Test active (dragged or drawing) segments against inactive segments
+       // This is used to test whether a way intersects with itself.

 
 

-         if (name instanceof Transition) {
-           id = name._id, name = name._name;
-         } else {
-           id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
-         }
+       function geoHasSelfIntersections(nodes, activeID) {
+         var actives = [];
+         var inactives = [];
+         var j, k; // group active and passive segments along the nodes

 
 

-         for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
-           for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
-             if (node = group[i]) {
-               schedule(node, name, id, i, group, timing || inherit(node, id));
-             }
+         for (j = 0; j < nodes.length - 1; j++) {
+           var n1 = nodes[j];
+           var n2 = nodes[j + 1];
+           var segment = [n1.loc, n2.loc];
+
+           if (n1.id === activeID || n2.id === activeID) {
+             actives.push(segment);
+           } else {
+             inactives.push(segment);

            }
            }

-         }
+         } // test

 
 

-         return new Transition(groups, this._parents, name, id);
-       }

 
 

-       selection.prototype.interrupt = selection_interrupt;
-       selection.prototype.transition = selection_transition;
+         for (j = 0; j < actives.length; j++) {
+           for (k = 0; k < inactives.length; k++) {
+             var p = actives[j];
+             var q = inactives[k]; // skip if segments share an endpoint

 
 

-       function constant$3(x) {
-         return function() {
-           return x;
-         };
-       }
+             if (geoVecEqual(p[1], q[0]) || geoVecEqual(p[0], q[1]) || geoVecEqual(p[0], q[0]) || geoVecEqual(p[1], q[1])) {
+               continue;
+             }

 
 

-       function ZoomEvent(target, type, transform) {
-         this.target = target;
-         this.type = type;
-         this.transform = transform;
-       }
+             var hit = geoLineIntersection(p, q);

 
 

-       function Transform(k, x, y) {
-         this.k = k;
-         this.x = x;
-         this.y = y;
-       }
+             if (hit) {
+               var epsilon = 1e-8; // skip if the hit is at the segment's endpoint

 
 

-       Transform.prototype = {
-         constructor: Transform,
-         scale: function(k) {
-           return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
-         },
-         translate: function(x, y) {
-           return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
-         },
-         apply: function(point) {
-           return [point[0] * this.k + this.x, point[1] * this.k + this.y];
-         },
-         applyX: function(x) {
-           return x * this.k + this.x;
-         },
-         applyY: function(y) {
-           return y * this.k + this.y;
-         },
-         invert: function(location) {
-           return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
-         },
-         invertX: function(x) {
-           return (x - this.x) / this.k;
-         },
-         invertY: function(y) {
-           return (y - this.y) / this.k;
-         },
-         rescaleX: function(x) {
-           return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
-         },
-         rescaleY: function(y) {
-           return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
-         },
-         toString: function() {
-           return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
+               if (geoVecEqual(p[1], hit, epsilon) || geoVecEqual(p[0], hit, epsilon) || geoVecEqual(q[1], hit, epsilon) || geoVecEqual(q[0], hit, epsilon)) {
+                 continue;
+               } else {
+                 return true;
+               }
+             }
+           }

          }
          }

-       };

 
 

-       var identity$2 = new Transform(1, 0, 0);
+         return false;
+       } // Return the intersection point of 2 line segments.
+       // From https://github.com/pgkelley4/line-segments-intersect
+       // This uses the vector cross product approach described below:
+       //  http://stackoverflow.com/a/565282/786339

 
 

-       function nopropagation$1() {
-         event.stopImmediatePropagation();
-       }
+       function geoLineIntersection(a, b) {
+         var p = [a[0][0], a[0][1]];
+         var p2 = [a[1][0], a[1][1]];
+         var q = [b[0][0], b[0][1]];
+         var q2 = [b[1][0], b[1][1]];
+         var r = geoVecSubtract(p2, p);
+         var s = geoVecSubtract(q2, q);
+         var uNumerator = geoVecCross(geoVecSubtract(q, p), r);
+         var denominator = geoVecCross(r, s);

 
 

-       function noevent$1() {
-         event.preventDefault();
-         event.stopImmediatePropagation();
-       }
+         if (uNumerator && denominator) {
+           var u = uNumerator / denominator;
+           var t = geoVecCross(geoVecSubtract(q, p), s) / denominator;

 
 

-       // Ignore right-click, since that should open the context menu.
-       function defaultFilter$1() {
-         return !event.ctrlKey && !event.button;
+           if (t >= 0 && t <= 1 && u >= 0 && u <= 1) {
+             return geoVecInterp(p, p2, t);
+           }
+         }
+
+         return null;

        }
        }

+       function geoPathIntersections(path1, path2) {
+         var intersections = [];

 
 

-       function defaultExtent() {
-         var e = this;
-         if (e instanceof SVGElement) {
-           e = e.ownerSVGElement || e;
-           if (e.hasAttribute("viewBox")) {
-             e = e.viewBox.baseVal;
-             return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+         for (var i = 0; i < path1.length - 1; i++) {
+           for (var j = 0; j < path2.length - 1; j++) {
+             var a = [path1[i], path1[i + 1]];
+             var b = [path2[j], path2[j + 1]];
+             var hit = geoLineIntersection(a, b);
+
+             if (hit) {
+               intersections.push(hit);
+             }

            }
            }

-           return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];

          }
          }

-         return [[0, 0], [e.clientWidth, e.clientHeight]];
-       }

 
 

-       function defaultTransform() {
-         return this.__zoom || identity$2;
+         return intersections;

        }
        }

+       function geoPathHasIntersections(path1, path2) {
+         for (var i = 0; i < path1.length - 1; i++) {
+           for (var j = 0; j < path2.length - 1; j++) {
+             var a = [path1[i], path1[i + 1]];
+             var b = [path2[j], path2[j + 1]];
+             var hit = geoLineIntersection(a, b);

 
 

-       function defaultWheelDelta() {
-         return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002);
-       }
+             if (hit) {
+               return true;
+             }
+           }
+         }

 
 

-       function defaultTouchable$1() {
-         return navigator.maxTouchPoints || ("ontouchstart" in this);
-       }
+         return false;
+       } // Return whether point is contained in polygon.
+       //
+       // `point` should be a 2-item array of coordinates.
+       // `polygon` should be an array of 2-item arrays of coordinates.
+       //
+       // From https://github.com/substack/point-in-polygon.
+       // ray-casting algorithm based on
+       // http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html
+       //

 
 

-       function defaultConstrain(transform, extent, translateExtent) {
-         var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
-             dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
-             dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
-             dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
-         return transform.translate(
-           dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
-           dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
-         );
+       function geoPointInPolygon(point, polygon) {
+         var x = point[0];
+         var y = point[1];
+         var inside = false;
+
+         for (var i = 0, j = polygon.length - 1; i < polygon.length; j = i++) {
+           var xi = polygon[i][0];
+           var yi = polygon[i][1];
+           var xj = polygon[j][0];
+           var yj = polygon[j][1];
+           var intersect = yi > y !== yj > y && x < (xj - xi) * (y - yi) / (yj - yi) + xi;
+           if (intersect) inside = !inside;
+         }
+
+         return inside;

        }
        }

+       function geoPolygonContainsPolygon(outer, inner) {
+         return inner.every(function (point) {
+           return geoPointInPolygon(point, outer);
+         });
+       }
+       function geoPolygonIntersectsPolygon(outer, inner, checkSegments) {
+         function testPoints(outer, inner) {
+           return inner.some(function (point) {
+             return geoPointInPolygon(point, outer);
+           });
+         }

 
 

-       function d3_zoom() {
-         var filter = defaultFilter$1,
-             extent = defaultExtent,
-             constrain = defaultConstrain,
-             wheelDelta = defaultWheelDelta,
-             touchable = defaultTouchable$1,
-             scaleExtent = [0, Infinity],
-             translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
-             duration = 250,
-             interpolate = interpolateZoom,
-             listeners = dispatch("start", "zoom", "end"),
-             touchstarting,
-             touchending,
-             touchDelay = 500,
-             wheelDelay = 150,
-             clickDistance2 = 0;
+         return testPoints(outer, inner) || !!checkSegments && geoPathHasIntersections(outer, inner);
+       } // http://gis.stackexchange.com/questions/22895/finding-minimum-area-rectangle-for-given-points
+       // http://gis.stackexchange.com/questions/3739/generalisation-strategies-for-building-outlines/3756#3756

 
 

-         function zoom(selection) {
-           selection
-               .property("__zoom", defaultTransform)
-               .on("wheel.zoom", wheeled)
-               .on("mousedown.zoom", mousedowned)
-               .on("dblclick.zoom", dblclicked)
-             .filter(touchable)
-               .on("touchstart.zoom", touchstarted)
-               .on("touchmove.zoom", touchmoved)
-               .on("touchend.zoom touchcancel.zoom", touchended)
-               .style("touch-action", "none")
-               .style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
-         }
-
-         zoom.transform = function(collection, transform, point) {
-           var selection = collection.selection ? collection.selection() : collection;
-           selection.property("__zoom", defaultTransform);
-           if (collection !== selection) {
-             schedule(collection, transform, point);
-           } else {
-             selection.interrupt().each(function() {
-               gesture(this, arguments)
-                   .start()
-                   .zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform)
-                   .end();
-             });
+       function geoGetSmallestSurroundingRectangle(points) {
+         var hull = d3_polygonHull(points);
+         var centroid = d3_polygonCentroid(hull);
+         var minArea = Infinity;
+         var ssrExtent = [];
+         var ssrAngle = 0;
+         var c1 = hull[0];
+
+         for (var i = 0; i <= hull.length - 1; i++) {
+           var c2 = i === hull.length - 1 ? hull[0] : hull[i + 1];
+           var angle = Math.atan2(c2[1] - c1[1], c2[0] - c1[0]);
+           var poly = geoRotate(hull, -angle, centroid);
+           var extent = poly.reduce(function (extent, point) {
+             return extent.extend(geoExtent(point));
+           }, geoExtent());
+           var area = extent.area();
+
+           if (area < minArea) {
+             minArea = area;
+             ssrExtent = extent;
+             ssrAngle = angle;

            }
            }

-         };

 
 

-         zoom.scaleBy = function(selection, k, p) {
-           zoom.scaleTo(selection, function() {
-             var k0 = this.__zoom.k,
-                 k1 = typeof k === "function" ? k.apply(this, arguments) : k;
-             return k0 * k1;
-           }, p);
-         };
+           c1 = c2;
+         }

 
 

-         zoom.scaleTo = function(selection, k, p) {
-           zoom.transform(selection, function() {
-             var e = extent.apply(this, arguments),
-                 t0 = this.__zoom,
-                 p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p,
-                 p1 = t0.invert(p0),
-                 k1 = typeof k === "function" ? k.apply(this, arguments) : k;
-             return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
-           }, p);
+         return {
+           poly: geoRotate(ssrExtent.polygon(), ssrAngle, centroid),
+           angle: ssrAngle

          };
          };

+       }
+       function geoPathLength(path) {
+         var length = 0;

 
 

-         zoom.translateBy = function(selection, x, y) {
-           zoom.transform(selection, function() {
-             return constrain(this.__zoom.translate(
-               typeof x === "function" ? x.apply(this, arguments) : x,
-               typeof y === "function" ? y.apply(this, arguments) : y
-             ), extent.apply(this, arguments), translateExtent);
-           });
-         };
+         for (var i = 0; i < path.length - 1; i++) {
+           length += geoVecLength(path[i], path[i + 1]);
+         }

 
 

-         zoom.translateTo = function(selection, x, y, p) {
-           zoom.transform(selection, function() {
-             var e = extent.apply(this, arguments),
-                 t = this.__zoom,
-                 p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p;
-             return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(
-               typeof x === "function" ? -x.apply(this, arguments) : -x,
-               typeof y === "function" ? -y.apply(this, arguments) : -y
-             ), e, translateExtent);
-           }, p);
-         };
+         return length;
+       } // If the given point is at the edge of the padded viewport,
+       // return a vector that will nudge the viewport in that direction

 
 

-         function scale(transform, k) {
-           k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
-           return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+       function geoViewportEdge(point, dimensions) {
+         var pad = [80, 20, 50, 20]; // top, right, bottom, left
+
+         var x = 0;
+         var y = 0;
+
+         if (point[0] > dimensions[0] - pad[1]) {
+           x = -10;

          }
 
          }
 

-         function translate(transform, p0, p1) {
-           var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;
-           return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+         if (point[0] < pad[3]) {
+           x = 10;

          }
 
          }
 

-         function centroid(extent) {
-           return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+         if (point[1] > dimensions[1] - pad[2]) {
+           y = -10;

          }
 
          }
 

-         function schedule(transition, transform, point) {
-           transition
-               .on("start.zoom", function() { gesture(this, arguments).start(); })
-               .on("interrupt.zoom end.zoom", function() { gesture(this, arguments).end(); })
-               .tween("zoom", function() {
-                 var that = this,
-                     args = arguments,
-                     g = gesture(that, args),
-                     e = extent.apply(that, args),
-                     p = point == null ? centroid(e) : typeof point === "function" ? point.apply(that, args) : point,
-                     w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
-                     a = that.__zoom,
-                     b = typeof transform === "function" ? transform.apply(that, args) : transform,
-                     i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
-                 return function(t) {
-                   if (t === 1) { t = b; } // Avoid rounding error on end.
-                   else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }
-                   g.zoom(null, t);
-                 };
-               });
+         if (point[1] < pad[0]) {
+           y = 10;

          }
 
          }
 

-         function gesture(that, args, clean) {
-           return (!clean && that.__zooming) || new Gesture(that, args);
+         if (x || y) {
+           return [x, y];
+         } else {
+           return null;

          }
          }

+       }

 
 

-         function Gesture(that, args) {
-           this.that = that;
-           this.args = args;
-           this.active = 0;
-           this.extent = extent.apply(that, args);
-           this.taps = 0;
+       var noop = {
+         value: function value() {}
+       };
+
+       function dispatch$8() {
+         for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
+           if (!(t = arguments[i] + "") || t in _ || /[\s.]/.test(t)) throw new Error("illegal type: " + t);
+           _[t] = [];

          }
 
          }
 

-         Gesture.prototype = {
-           start: function() {
-             if (++this.active === 1) {
-               this.that.__zooming = this;
-               this.emit("start");
-             }
-             return this;
-           },
-           zoom: function(key, transform) {
-             if (this.mouse && key !== "mouse") { this.mouse[1] = transform.invert(this.mouse[0]); }
-             if (this.touch0 && key !== "touch") { this.touch0[1] = transform.invert(this.touch0[0]); }
-             if (this.touch1 && key !== "touch") { this.touch1[1] = transform.invert(this.touch1[0]); }
-             this.that.__zoom = transform;
-             this.emit("zoom");
-             return this;
-           },
-           end: function() {
-             if (--this.active === 0) {
-               delete this.that.__zooming;
-               this.emit("end");
+         return new Dispatch(_);
+       }
+
+       function Dispatch(_) {
+         this._ = _;
+       }
+
+       function parseTypenames$1(typenames, types) {
+         return typenames.trim().split(/^|\s+/).map(function (t) {
+           var name = "",
+               i = t.indexOf(".");
+           if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+           if (t && !types.hasOwnProperty(t)) throw new Error("unknown type: " + t);
+           return {
+             type: t,
+             name: name
+           };
+         });
+       }
+
+       Dispatch.prototype = dispatch$8.prototype = {
+         constructor: Dispatch,
+         on: function on(typename, callback) {
+           var _ = this._,
+               T = parseTypenames$1(typename + "", _),
+               t,
+               i = -1,
+               n = T.length; // If no callback was specified, return the callback of the given type and name.
+
+           if (arguments.length < 2) {
+             while (++i < n) {
+               if ((t = (typename = T[i]).type) && (t = get$2(_[t], typename.name))) return t;

              }
              }

-             return this;
-           },
-           emit: function(type) {
-             customEvent(new ZoomEvent(zoom, type, this.that.__zoom), listeners.apply, listeners, [type, this.that, this.args]);
-           }
-         };

 
 

-         function wheeled() {
-           if (!filter.apply(this, arguments)) { return; }
-           var g = gesture(this, arguments),
-               t = this.__zoom,
-               k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
-               p = mouse(this);
+             return;
+           } // If a type was specified, set the callback for the given type and name.
+           // Otherwise, if a null callback was specified, remove callbacks of the given name.

 
 

-           // If the mouse is in the same location as before, reuse it.
-           // If there were recent wheel events, reset the wheel idle timeout.
-           if (g.wheel) {
-             if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
-               g.mouse[1] = t.invert(g.mouse[0] = p);
+
+           if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
+
+           while (++i < n) {
+             if (t = (typename = T[i]).type) _[t] = set$1(_[t], typename.name, callback);else if (callback == null) for (t in _) {
+               _[t] = set$1(_[t], typename.name, null);

              }
              }

-             clearTimeout(g.wheel);

            }
 
            }
 

-           // If this wheel event won’t trigger a transform change, ignore it.
-           else if (t.k === k) { return; }
+           return this;
+         },
+         copy: function copy() {
+           var copy = {},
+               _ = this._;

 
 

-           // Otherwise, capture the mouse point and location at the start.
-           else {
-             g.mouse = [p, t.invert(p)];
-             interrupt(this);
-             g.start();
+           for (var t in _) {
+             copy[t] = _[t].slice();

            }
 
            }
 

-           noevent$1();
-           g.wheel = setTimeout(wheelidled, wheelDelay);
-           g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
-
-           function wheelidled() {
-             g.wheel = null;
-             g.end();
+           return new Dispatch(copy);
+         },
+         call: function call(type, that) {
+           if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) {
+             args[i] = arguments[i + 2];

            }
            }

-         }
+           if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);

 
 

-         function mousedowned() {
-           if (touchending || !filter.apply(this, arguments)) { return; }
-           var g = gesture(this, arguments, true),
-               v = select(event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
-               p = mouse(this),
-               x0 = event.clientX,
-               y0 = event.clientY;
+           for (t = this._[type], i = 0, n = t.length; i < n; ++i) {
+             t[i].value.apply(that, args);
+           }
+         },
+         apply: function apply(type, that, args) {
+           if (!this._.hasOwnProperty(type)) throw new Error("unknown type: " + type);

 
 

-           dragDisable(event.view);
-           nopropagation$1();
-           g.mouse = [p, this.__zoom.invert(p)];
-           interrupt(this);
-           g.start();
+           for (var t = this._[type], i = 0, n = t.length; i < n; ++i) {
+             t[i].value.apply(that, args);
+           }
+         }
+       };

 
 

-           function mousemoved() {
-             noevent$1();
-             if (!g.moved) {
-               var dx = event.clientX - x0, dy = event.clientY - y0;
-               g.moved = dx * dx + dy * dy > clickDistance2;
-             }
-             g.zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = mouse(g.that), g.mouse[1]), g.extent, translateExtent));
+       function get$2(type, name) {
+         for (var i = 0, n = type.length, c; i < n; ++i) {
+           if ((c = type[i]).name === name) {
+             return c.value;

            }
            }

+         }
+       }

 
 

-           function mouseupped() {
-             v.on("mousemove.zoom mouseup.zoom", null);
-             yesdrag(event.view, g.moved);
-             noevent$1();
-             g.end();
+       function set$1(type, name, callback) {
+         for (var i = 0, n = type.length; i < n; ++i) {
+           if (type[i].name === name) {
+             type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
+             break;

            }
          }
 
            }
          }
 

-         function dblclicked() {
-           if (!filter.apply(this, arguments)) { return; }
-           var t0 = this.__zoom,
-               p0 = mouse(this),
-               p1 = t0.invert(p0),
-               k1 = t0.k * (event.shiftKey ? 0.5 : 2),
-               t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, arguments), translateExtent);
+         if (callback != null) type.push({
+           name: name,
+           value: callback
+         });
+         return type;
+       }

 
 

-           noevent$1();
-           if (duration > 0) { select(this).transition().duration(duration).call(schedule, t1, p0); }
-           else { select(this).call(zoom.transform, t1); }
-         }
+       var xhtml = "http://www.w3.org/1999/xhtml";
+       var namespaces = {
+         svg: "http://www.w3.org/2000/svg",
+         xhtml: xhtml,
+         xlink: "http://www.w3.org/1999/xlink",
+         xml: "http://www.w3.org/XML/1998/namespace",
+         xmlns: "http://www.w3.org/2000/xmlns/"
+       };

 
 

-         function touchstarted() {
-           if (!filter.apply(this, arguments)) { return; }
-           var touches = event.touches,
-               n = touches.length,
-               g = gesture(this, arguments, event.changedTouches.length === n),
-               started, i, t, p;
+       function namespace (name) {
+         var prefix = name += "",
+             i = prefix.indexOf(":");
+         if (i >= 0 && (prefix = name.slice(0, i)) !== "xmlns") name = name.slice(i + 1);
+         return namespaces.hasOwnProperty(prefix) ? {
+           space: namespaces[prefix],
+           local: name
+         } : name; // eslint-disable-line no-prototype-builtins
+       }

 
 

-           nopropagation$1();
-           for (i = 0; i < n; ++i) {
-             t = touches[i], p = touch(this, touches, t.identifier);
-             p = [p, this.__zoom.invert(p), t.identifier];
-             if (!g.touch0) { g.touch0 = p, started = true, g.taps = 1 + !!touchstarting; }
-             else if (!g.touch1 && g.touch0[2] !== p[2]) { g.touch1 = p, g.taps = 0; }
-           }
+       function creatorInherit(name) {
+         return function () {
+           var document = this.ownerDocument,
+               uri = this.namespaceURI;
+           return uri === xhtml && document.documentElement.namespaceURI === xhtml ? document.createElement(name) : document.createElementNS(uri, name);
+         };
+       }

 
 

-           if (touchstarting) { touchstarting = clearTimeout(touchstarting); }
+       function creatorFixed(fullname) {
+         return function () {
+           return this.ownerDocument.createElementNS(fullname.space, fullname.local);
+         };
+       }

 
 

-           if (started) {
-             if (g.taps < 2) { touchstarting = setTimeout(function() { touchstarting = null; }, touchDelay); }
-             interrupt(this);
-             g.start();
-           }
-         }
+       function creator (name) {
+         var fullname = namespace(name);
+         return (fullname.local ? creatorFixed : creatorInherit)(fullname);
+       }

 
 

-         function touchmoved() {
-           if (!this.__zooming) { return; }
-           var g = gesture(this, arguments),
-               touches = event.changedTouches,
-               n = touches.length, i, t, p, l;
+       function none() {}

 
 

-           noevent$1();
-           if (touchstarting) { touchstarting = clearTimeout(touchstarting); }
-           g.taps = 0;
-           for (i = 0; i < n; ++i) {
-             t = touches[i], p = touch(this, touches, t.identifier);
-             if (g.touch0 && g.touch0[2] === t.identifier) { g.touch0[0] = p; }
-             else if (g.touch1 && g.touch1[2] === t.identifier) { g.touch1[0] = p; }
-           }
-           t = g.that.__zoom;
-           if (g.touch1) {
-             var p0 = g.touch0[0], l0 = g.touch0[1],
-                 p1 = g.touch1[0], l1 = g.touch1[1],
-                 dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
-                 dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
-             t = scale(t, Math.sqrt(dp / dl));
-             p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
-             l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
-           }
-           else if (g.touch0) { p = g.touch0[0], l = g.touch0[1]; }
-           else { return; }
-           g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
-         }
+       function selector (selector) {
+         return selector == null ? none : function () {
+           return this.querySelector(selector);
+         };
+       }

 
 

-         function touchended() {
-           if (!this.__zooming) { return; }
-           var g = gesture(this, arguments),
-               touches = event.changedTouches,
-               n = touches.length, i, t;
+       function selection_select (select) {
+         if (typeof select !== "function") select = selector(select);

 
 

-           nopropagation$1();
-           if (touchending) { clearTimeout(touchending); }
-           touchending = setTimeout(function() { touchending = null; }, touchDelay);
-           for (i = 0; i < n; ++i) {
-             t = touches[i];
-             if (g.touch0 && g.touch0[2] === t.identifier) { delete g.touch0; }
-             else if (g.touch1 && g.touch1[2] === t.identifier) { delete g.touch1; }
-           }
-           if (g.touch1 && !g.touch0) { g.touch0 = g.touch1, delete g.touch1; }
-           if (g.touch0) { g.touch0[1] = this.__zoom.invert(g.touch0[0]); }
-           else {
-             g.end();
-             // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.
-             if (g.taps === 2) {
-               var p = select(this).on("dblclick.zoom");
-               if (p) { p.apply(this, arguments); }
+         for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+           for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+             if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+               if ("__data__" in node) subnode.__data__ = node.__data__;
+               subgroup[i] = subnode;

              }
            }
          }
 
              }
            }
          }
 

-         zoom.wheelDelta = function(_) {
-           return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$3(+_), zoom) : wheelDelta;
-         };
+         return new Selection$1(subgroups, this._parents);
+       }

 
 

-         zoom.filter = function(_) {
-           return arguments.length ? (filter = typeof _ === "function" ? _ : constant$3(!!_), zoom) : filter;
-         };
+       function array (x) {
+         return _typeof(x) === "object" && "length" in x ? x // Array, TypedArray, NodeList, array-like
+         : Array.from(x); // Map, Set, iterable, string, or anything else
+       }

 
 

-         zoom.touchable = function(_) {
-           return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$3(!!_), zoom) : touchable;
-         };
+       function empty() {
+         return [];
+       }

 
 

-         zoom.extent = function(_) {
-           return arguments.length ? (extent = typeof _ === "function" ? _ : constant$3([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+       function selectorAll (selector) {
+         return selector == null ? empty : function () {
+           return this.querySelectorAll(selector);

          };
          };

+       }

 
 

-         zoom.scaleExtent = function(_) {
-           return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+       function arrayAll(select) {
+         return function () {
+           var group = select.apply(this, arguments);
+           return group == null ? [] : array(group);

          };
          };

+       }

 
 

-         zoom.translateExtent = function(_) {
-           return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
-         };
+       function selection_selectAll (select) {
+         if (typeof select === "function") select = arrayAll(select);else select = selectorAll(select);

 
 

-         zoom.constrain = function(_) {
-           return arguments.length ? (constrain = _, zoom) : constrain;
-         };
+         for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+           for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+             if (node = group[i]) {
+               subgroups.push(select.call(node, node.__data__, i, group));
+               parents.push(node);
+             }
+           }
+         }

 
 

-         zoom.duration = function(_) {
-           return arguments.length ? (duration = +_, zoom) : duration;
-         };
+         return new Selection$1(subgroups, parents);
+       }

 
 

-         zoom.interpolate = function(_) {
-           return arguments.length ? (interpolate = _, zoom) : interpolate;
-         };
+       var $$n = _export;
+       var $find = arrayIteration.find;
+       var addToUnscopables$2 = addToUnscopables$5;

 
 

-         zoom.on = function() {
-           var value = listeners.on.apply(listeners, arguments);
-           return value === listeners ? zoom : value;
+       var FIND = 'find';
+       var SKIPS_HOLES$1 = true;
+
+       // Shouldn't skip holes
+       if (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES$1 = false; });
+
+       // `Array.prototype.find` method
+       // https://tc39.es/ecma262/#sec-array.prototype.find
+       $$n({ target: 'Array', proto: true, forced: SKIPS_HOLES$1 }, {
+         find: function find(callbackfn /* , that = undefined */) {
+           return $find(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });
+
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables$2(FIND);
+
+       function matcher (selector) {
+         return function () {
+           return this.matches(selector);
+         };
+       }
+       function childMatcher(selector) {
+         return function (node) {
+           return node.matches(selector);

          };
          };

+       }

 
 

-         zoom.clickDistance = function(_) {
-           return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
+       var find = Array.prototype.find;
+
+       function childFind(match) {
+         return function () {
+           return find.call(this.children, match);

          };
          };

+       }

 
 

-         return zoom;
+       function childFirst() {
+         return this.firstElementChild;

        }
 
        }
 

-       /*
-           Bypasses features of D3's default projection stream pipeline that are unnecessary:
-           * Antimeridian clipping
-           * Spherical rotation
-           * Resampling
-       */
-       function geoRawMercator() {
-           var project = mercatorRaw;
-           var k = 512 / Math.PI; // scale
-           var x = 0;
-           var y = 0; // translate
-           var clipExtent = [[0, 0], [0, 0]];
+       function selection_selectChild (match) {
+         return this.select(match == null ? childFirst : childFind(typeof match === "function" ? match : childMatcher(match)));
+       }

 
 

+       var filter = Array.prototype.filter;

 
 

-           function projection(point) {
-               point = project(point[0] * Math.PI / 180, point[1] * Math.PI / 180);
-               return [point[0] * k + x, y - point[1] * k];
-           }
+       function children() {
+         return this.children;
+       }

 
 

+       function childrenFilter(match) {
+         return function () {
+           return filter.call(this.children, match);
+         };
+       }

 
 

-           projection.invert = function(point) {
-               point = project.invert((point[0] - x) / k, (y - point[1]) / k);
-               return point && [point[0] * 180 / Math.PI, point[1] * 180 / Math.PI];
-           };
+       function selection_selectChildren (match) {
+         return this.selectAll(match == null ? children : childrenFilter(typeof match === "function" ? match : childMatcher(match)));
+       }

 
 

+       function selection_filter (match) {
+         if (typeof match !== "function") match = matcher(match);

 
 

-           projection.scale = function(_) {
-               if (!arguments.length) { return k; }
-               k = +_;
-               return projection;
-           };
+         for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+           for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+             if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+               subgroup.push(node);
+             }
+           }
+         }

 
 

+         return new Selection$1(subgroups, this._parents);
+       }

 
 

-           projection.translate = function(_) {
-               if (!arguments.length) { return [x, y]; }
-               x = +_[0];
-               y = +_[1];
-               return projection;
-           };
+       function sparse (update) {
+         return new Array(update.length);
+       }

 
 

+       function selection_enter () {
+         return new Selection$1(this._enter || this._groups.map(sparse), this._parents);
+       }
+       function EnterNode(parent, datum) {
+         this.ownerDocument = parent.ownerDocument;
+         this.namespaceURI = parent.namespaceURI;
+         this._next = null;
+         this._parent = parent;
+         this.__data__ = datum;
+       }
+       EnterNode.prototype = {
+         constructor: EnterNode,
+         appendChild: function appendChild(child) {
+           return this._parent.insertBefore(child, this._next);
+         },
+         insertBefore: function insertBefore(child, next) {
+           return this._parent.insertBefore(child, next);
+         },
+         querySelector: function querySelector(selector) {
+           return this._parent.querySelector(selector);
+         },
+         querySelectorAll: function querySelectorAll(selector) {
+           return this._parent.querySelectorAll(selector);
+         }
+       };

 
 

-           projection.clipExtent = function(_) {
-               if (!arguments.length) { return clipExtent; }
-               clipExtent = _;
-               return projection;
-           };
+       function constant$3 (x) {
+         return function () {
+           return x;
+         };
+       }

 
 

+       function bindIndex(parent, group, enter, update, exit, data) {
+         var i = 0,
+             node,
+             groupLength = group.length,
+             dataLength = data.length; // Put any non-null nodes that fit into update.
+         // Put any null nodes into enter.
+         // Put any remaining data into enter.

 
 

-           projection.transform = function(obj) {
-               if (!arguments.length) { return identity$2.translate(x, y).scale(k); }
-               x = +obj.x;
-               y = +obj.y;
-               k = +obj.k;
-               return projection;
-           };
+         for (; i < dataLength; ++i) {
+           if (node = group[i]) {
+             node.__data__ = data[i];
+             update[i] = node;
+           } else {
+             enter[i] = new EnterNode(parent, data[i]);
+           }
+         } // Put any non-null nodes that don’t fit into exit.

 
 
 
 

-           projection.stream = d3_geoTransform({
-               point: function(x, y) {
-                   var vec = projection([x, y]);
-                   this.stream.point(vec[0], vec[1]);
-               }
-           }).stream;
+         for (; i < groupLength; ++i) {
+           if (node = group[i]) {
+             exit[i] = node;
+           }
+         }
+       }

 
 

+       function bindKey(parent, group, enter, update, exit, data, key) {
+         var i,
+             node,
+             nodeByKeyValue = new Map(),
+             groupLength = group.length,
+             dataLength = data.length,
+             keyValues = new Array(groupLength),
+             keyValue; // Compute the key for each node.
+         // If multiple nodes have the same key, the duplicates are added to exit.

 
 

-           return projection;
-       }
+         for (i = 0; i < groupLength; ++i) {
+           if (node = group[i]) {
+             keyValues[i] = keyValue = key.call(node, node.__data__, i, group) + "";

 
 

-       function geoOrthoNormalizedDotProduct(a, b, origin) {
-           if (geoVecEqual(origin, a) || geoVecEqual(origin, b)) {
-               return 1;  // coincident points, treat as straight and try to remove
+             if (nodeByKeyValue.has(keyValue)) {
+               exit[i] = node;
+             } else {
+               nodeByKeyValue.set(keyValue, node);
+             }

            }
            }

-           return geoVecNormalizedDot(a, b, origin);
-       }
+         } // Compute the key for each datum.
+         // If there a node associated with this key, join and add it to update.
+         // If there is not (or the key is a duplicate), add it to enter.

 
 
 
 

-       function geoOrthoFilterDotProduct(dotp, epsilon, lowerThreshold, upperThreshold, allowStraightAngles) {
-           var val = Math.abs(dotp);
-           if (val < epsilon) {
-               return 0;      // already orthogonal
-           } else if (allowStraightAngles && Math.abs(val-1) < epsilon) {
-               return 0;      // straight angle, which is okay in this case
-           } else if (val < lowerThreshold || val > upperThreshold) {
-               return dotp;   // can be adjusted
+         for (i = 0; i < dataLength; ++i) {
+           keyValue = key.call(parent, data[i], i, data) + "";
+
+           if (node = nodeByKeyValue.get(keyValue)) {
+             update[i] = node;
+             node.__data__ = data[i];
+             nodeByKeyValue["delete"](keyValue);

            } else {
            } else {

-               return null;   // ignore vertex
+             enter[i] = new EnterNode(parent, data[i]);
+           }
+         } // Add any remaining nodes that were not bound to data to exit.
+
+
+         for (i = 0; i < groupLength; ++i) {
+           if ((node = group[i]) && nodeByKeyValue.get(keyValues[i]) === node) {
+             exit[i] = node;

            }
            }

+         }

        }
 
        }
 

+       function datum(node) {
+         return node.__data__;
+       }

 
 

-       function geoOrthoCalcScore(points, isClosed, epsilon, threshold) {
-           var score = 0;
-           var first = isClosed ? 0 : 1;
-           var last = isClosed ? points.length : points.length - 1;
-           var coords = points.map(function(p) { return p.coord; });
+       function selection_data (value, key) {
+         if (!arguments.length) return Array.from(this, datum);
+         var bind = key ? bindKey : bindIndex,
+             parents = this._parents,
+             groups = this._groups;
+         if (typeof value !== "function") value = constant$3(value);
+
+         for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
+           var parent = parents[j],
+               group = groups[j],
+               groupLength = group.length,
+               data = array(value.call(parent, parent && parent.__data__, j, parents)),
+               dataLength = data.length,
+               enterGroup = enter[j] = new Array(dataLength),
+               updateGroup = update[j] = new Array(dataLength),
+               exitGroup = exit[j] = new Array(groupLength);
+           bind(parent, group, enterGroup, updateGroup, exitGroup, data, key); // Now connect the enter nodes to their following update node, such that
+           // appendChild can insert the materialized enter node before this node,
+           // rather than at the end of the parent node.

 
 

-           var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-           var upperThreshold = Math.cos(threshold * Math.PI / 180);
+           for (var i0 = 0, i1 = 0, previous, next; i0 < dataLength; ++i0) {
+             if (previous = enterGroup[i0]) {
+               if (i0 >= i1) i1 = i0 + 1;

 
 

-           for (var i = first; i < last; i++) {
-               var a = coords[(i - 1 + coords.length) % coords.length];
-               var origin = coords[i];
-               var b = coords[(i + 1) % coords.length];
+               while (!(next = updateGroup[i1]) && ++i1 < dataLength) {
+               }

 
 

-               var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold);
-               if (dotp === null) { continue; }    // ignore vertex
-               score = score + 2.0 * Math.min(Math.abs(dotp - 1.0), Math.min(Math.abs(dotp), Math.abs(dotp + 1)));
+               previous._next = next || null;
+             }

            }
            }

+         }

 
 

-           return score;
+         update = new Selection$1(update, parents);
+         update._enter = enter;
+         update._exit = exit;
+         return update;

        }
 
        }
 

-       // returns the maximum angle less than `lessThan` between the actual corner and a 0° or 90° corner
-       function geoOrthoMaxOffsetAngle(coords, isClosed, lessThan) {
-           var max = -Infinity;
+       function selection_exit () {
+         return new Selection$1(this._exit || this._groups.map(sparse), this._parents);
+       }

 
 

-           var first = isClosed ? 0 : 1;
-           var last = isClosed ? coords.length : coords.length - 1;
+       function selection_join (onenter, onupdate, onexit) {
+         var enter = this.enter(),
+             update = this,
+             exit = this.exit();
+         enter = typeof onenter === "function" ? onenter(enter) : enter.append(onenter + "");
+         if (onupdate != null) update = onupdate(update);
+         if (onexit == null) exit.remove();else onexit(exit);
+         return enter && update ? enter.merge(update).order() : update;
+       }

 
 

-           for (var i = first; i < last; i++) {
-               var a = coords[(i - 1 + coords.length) % coords.length];
-               var origin = coords[i];
-               var b = coords[(i + 1) % coords.length];
-               var normalizedDotP = geoOrthoNormalizedDotProduct(a, b, origin);
+       function selection_merge (selection) {
+         if (!(selection instanceof Selection$1)) throw new Error("invalid merge");

 
 

-               var angle = Math.acos(Math.abs(normalizedDotP)) * 180 / Math.PI;
+         for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+           for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+             if (node = group0[i] || group1[i]) {
+               merge[i] = node;
+             }
+           }
+         }

 
 

-               if (angle > 45) { angle = 90 - angle; }
+         for (; j < m0; ++j) {
+           merges[j] = groups0[j];
+         }

 
 

-               if (angle >= lessThan) { continue; }
+         return new Selection$1(merges, this._parents);
+       }

 
 

-               if (angle > max) { max = angle; }
+       function selection_order () {
+         for (var groups = this._groups, j = -1, m = groups.length; ++j < m;) {
+           for (var group = groups[j], i = group.length - 1, next = group[i], node; --i >= 0;) {
+             if (node = group[i]) {
+               if (next && node.compareDocumentPosition(next) ^ 4) next.parentNode.insertBefore(node, next);
+               next = node;
+             }

            }
            }

+         }

 
 

-           if (max === -Infinity) { return null; }
-
-           return max;
+         return this;

        }
 
        }
 

+       function selection_sort (compare) {
+         if (!compare) compare = ascending;

 
 

-       // similar to geoOrthoCalcScore, but returns quickly if there is something to do
-       function geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles) {
-           var score = null;
-           var first = isClosed ? 0 : 1;
-           var last = isClosed ? coords.length : coords.length - 1;
+         function compareNode(a, b) {
+           return a && b ? compare(a.__data__, b.__data__) : !a - !b;
+         }
+
+         for (var groups = this._groups, m = groups.length, sortgroups = new Array(m), j = 0; j < m; ++j) {
+           for (var group = groups[j], n = group.length, sortgroup = sortgroups[j] = new Array(n), node, i = 0; i < n; ++i) {
+             if (node = group[i]) {
+               sortgroup[i] = node;
+             }
+           }

 
 

-           var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-           var upperThreshold = Math.cos(threshold * Math.PI / 180);
+           sortgroup.sort(compareNode);
+         }

 
 

-           for (var i = first; i < last; i++) {
-               var a = coords[(i - 1 + coords.length) % coords.length];
-               var origin = coords[i];
-               var b = coords[(i + 1) % coords.length];
+         return new Selection$1(sortgroups, this._parents).order();
+       }

 
 

-               var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold, allowStraightAngles);
-               if (dotp === null) { continue; }        // ignore vertex
-               if (Math.abs(dotp) > 0) { return 1; }   // something to do
-               score = 0;                          // already square
-           }
+       function ascending(a, b) {
+         return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
+       }

 
 

-           return score;
+       function selection_call () {
+         var callback = arguments[0];
+         arguments[0] = this;
+         callback.apply(null, arguments);
+         return this;

        }
 
        }
 

-       // Returns true if a and b have the same elements at the same indices.
-       function utilArrayIdentical(a, b) {
-           // an array is always identical to itself
-           if (a === b) { return true; }
+       function selection_nodes () {
+         return Array.from(this);
+       }

 
 

-           var i = a.length;
-           if (i !== b.length) { return false; }
-           while (i--) {
-               if (a[i] !== b[i]) { return false; }
+       function selection_node () {
+         for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+           for (var group = groups[j], i = 0, n = group.length; i < n; ++i) {
+             var node = group[i];
+             if (node) return node;

            }
            }

-           return true;
+         }
+
+         return null;

        }
 
        }
 

-       // http://2ality.com/2015/01/es6-set-operations.html
+       function selection_size () {
+         var size = 0;

 
 

-       // Difference (a \ b): create a set that contains those elements of set a that are not in set b.
-       // This operation is also sometimes called minus (-).
-       // var a = [1,2,3];
-       // var b = [4,3,2];
-       // utilArrayDifference(a, b)
-       //   [1]
-       // utilArrayDifference(b, a)
-       //   [4]
-       function utilArrayDifference(a, b) {
-           var other = new Set(b);
-           return Array.from(new Set(a))
-               .filter(function(v) { return !other.has(v); });
+         var _iterator = _createForOfIteratorHelper(this),
+             _step;
+
+         try {
+           for (_iterator.s(); !(_step = _iterator.n()).done;) {
+             var node = _step.value;
+             ++size;
+           } // eslint-disable-line no-unused-vars
+
+         } catch (err) {
+           _iterator.e(err);
+         } finally {
+           _iterator.f();
+         }
+
+         return size;

        }
 
        }
 

-       // Intersection (a ∩ b): create a set that contains those elements of set a that are also in set b.
-       // var a = [1,2,3];
-       // var b = [4,3,2];
-       // utilArrayIntersection(a, b)
-       //   [2,3]
-       function utilArrayIntersection(a, b) {
-           var other = new Set(b);
-           return Array.from(new Set(a))
-               .filter(function(v) { return other.has(v); });
+       function selection_empty () {
+         return !this.node();

        }
 
        }
 

-       // Union (a ∪ b): create a set that contains the elements of both set a and set b.
-       // var a = [1,2,3];
-       // var b = [4,3,2];
-       // utilArrayUnion(a, b)
-       //   [1,2,3,4]
-       function utilArrayUnion(a, b) {
-           var result = new Set(a);
-           b.forEach(function(v) { result.add(v); });
-           return Array.from(result);
+       function selection_each (callback) {
+         for (var groups = this._groups, j = 0, m = groups.length; j < m; ++j) {
+           for (var group = groups[j], i = 0, n = group.length, node; i < n; ++i) {
+             if (node = group[i]) callback.call(node, node.__data__, i, group);
+           }
+         }
+
+         return this;

        }
 
        }
 

-       // Returns an Array with all the duplicates removed
-       // var a = [1,1,2,3,3];
-       // utilArrayUniq(a)
-       //   [1,2,3]
-       function utilArrayUniq(a) {
-           return Array.from(new Set(a));
+       function attrRemove$1(name) {
+         return function () {
+           this.removeAttribute(name);
+         };

        }
 
        }
 

+       function attrRemoveNS$1(fullname) {
+         return function () {
+           this.removeAttributeNS(fullname.space, fullname.local);
+         };
+       }

 
 

-       // Splits array into chunks of given chunk size
-       // var a = [1,2,3,4,5,6,7];
-       // utilArrayChunk(a, 3);
-       //   [[1,2,3],[4,5,6],[7]];
-       function utilArrayChunk(a, chunkSize) {
-           if (!chunkSize || chunkSize < 0) { return [a.slice()]; }
+       function attrConstant$1(name, value) {
+         return function () {
+           this.setAttribute(name, value);
+         };
+       }

 
 

-           var result = new Array(Math.ceil(a.length / chunkSize));
-           return Array.from(result, function(item, i) {
-               return a.slice(i * chunkSize, i * chunkSize + chunkSize);
-           });
+       function attrConstantNS$1(fullname, value) {
+         return function () {
+           this.setAttributeNS(fullname.space, fullname.local, value);
+         };

        }
 
        }
 

+       function attrFunction$1(name, value) {
+         return function () {
+           var v = value.apply(this, arguments);
+           if (v == null) this.removeAttribute(name);else this.setAttribute(name, v);
+         };
+       }

 
 

-       // Flattens two level array into a single level
-       // var a = [[1,2,3],[4,5,6],[7]];
-       // utilArrayFlatten(a);
-       //   [1,2,3,4,5,6,7];
-       function utilArrayFlatten(a) {
-           return a.reduce(function(acc, val) {
-               return acc.concat(val);
-           }, []);
+       function attrFunctionNS$1(fullname, value) {
+         return function () {
+           var v = value.apply(this, arguments);
+           if (v == null) this.removeAttributeNS(fullname.space, fullname.local);else this.setAttributeNS(fullname.space, fullname.local, v);
+         };

        }
 
        }
 

+       function selection_attr (name, value) {
+         var fullname = namespace(name);

 
 

-       // Groups the items of the Array according to the given key
-       // `key` can be passed as a property or as a key function
-       //
-       // var pets = [
-       //     { type: 'Dog', name: 'Spot' },
-       //     { type: 'Cat', name: 'Tiger' },
-       //     { type: 'Dog', name: 'Rover' },
-       //     { type: 'Cat', name: 'Leo' }
-       // ];
-       //
-       // utilArrayGroupBy(pets, 'type')
-       //   {
-       //     'Dog': [{type: 'Dog', name: 'Spot'}, {type: 'Dog', name: 'Rover'}],
-       //     'Cat': [{type: 'Cat', name: 'Tiger'}, {type: 'Cat', name: 'Leo'}]
-       //   }
-       //
-       // utilArrayGroupBy(pets, function(item) { return item.name.length; })
-       //   {
-       //     3: [{type: 'Cat', name: 'Leo'}],
-       //     4: [{type: 'Dog', name: 'Spot'}],
-       //     5: [{type: 'Cat', name: 'Tiger'}, {type: 'Dog', name: 'Rover'}]
-       //   }
-       function utilArrayGroupBy(a, key) {
-           return a.reduce(function(acc, item) {
-               var group = (typeof key === 'function') ? key(item) : item[key];
-               (acc[group] = acc[group] || []).push(item);
-               return acc;
-           }, {});
+         if (arguments.length < 2) {
+           var node = this.node();
+           return fullname.local ? node.getAttributeNS(fullname.space, fullname.local) : node.getAttribute(fullname);
+         }
+
+         return this.each((value == null ? fullname.local ? attrRemoveNS$1 : attrRemove$1 : typeof value === "function" ? fullname.local ? attrFunctionNS$1 : attrFunction$1 : fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, value));

        }
 
        }
 

+       function defaultView (node) {
+         return node.ownerDocument && node.ownerDocument.defaultView || // node is a Node
+         node.document && node // node is a Window
+         || node.defaultView; // node is a Document
+       }

 
 

-       // Returns an Array with all the duplicates removed
-       // where uniqueness determined by the given key
-       // `key` can be passed as a property or as a key function
-       //
-       // var pets = [
-       //     { type: 'Dog', name: 'Spot' },
-       //     { type: 'Cat', name: 'Tiger' },
-       //     { type: 'Dog', name: 'Rover' },
-       //     { type: 'Cat', name: 'Leo' }
-       // ];
-       //
-       // utilArrayUniqBy(pets, 'type')
-       //   [
-       //     { type: 'Dog', name: 'Spot' },
-       //     { type: 'Cat', name: 'Tiger' }
-       //   ]
-       //
-       // utilArrayUniqBy(pets, function(item) { return item.name.length; })
-       //   [
-       //     { type: 'Dog', name: 'Spot' },
-       //     { type: 'Cat', name: 'Tiger' },
-       //     { type: 'Cat', name: 'Leo' }
-       //   }
-       function utilArrayUniqBy(a, key) {
-           var seen = new Set();
-           return a.reduce(function(acc, item) {
-               var val = (typeof key === 'function') ? key(item) : item[key];
-               if (val && !seen.has(val)) {
-                   seen.add(val);
-                   acc.push(item);
-               }
-               return acc;
-           }, []);
+       function styleRemove$1(name) {
+         return function () {
+           this.style.removeProperty(name);
+         };

        }
 
        }
 

-       var remove$1 = removeDiacritics;
+       function styleConstant$1(name, value, priority) {
+         return function () {
+           this.style.setProperty(name, value, priority);
+         };
+       }

 
 

-       var replacementList = [
-         {
-           base: ' ',
-           chars: "\u00A0",
-         }, {
-           base: '0',
-           chars: "\u07C0",
-         }, {
-           base: 'A',
-           chars: "\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F",
-         }, {
-           base: 'AA',
-           chars: "\uA732",
-         }, {
-           base: 'AE',
-           chars: "\u00C6\u01FC\u01E2",
-         }, {
-           base: 'AO',
-           chars: "\uA734",
-         }, {
-           base: 'AU',
-           chars: "\uA736",
-         }, {
-           base: 'AV',
-           chars: "\uA738\uA73A",
-         }, {
-           base: 'AY',
-           chars: "\uA73C",
-         }, {
-           base: 'B',
-           chars: "\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0181",
-         }, {
-           base: 'C',
-           chars: "\u24b8\uff23\uA73E\u1E08\u0106\u0043\u0108\u010A\u010C\u00C7\u0187\u023B",
-         }, {
-           base: 'D',
-           chars: "\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018A\u0189\u1D05\uA779",
-         }, {
-           base: 'Dh',
-           chars: "\u00D0",
-         }, {
-           base: 'DZ',
-           chars: "\u01F1\u01C4",
-         }, {
-           base: 'Dz',
-           chars: "\u01F2\u01C5",
-         }, {
-           base: 'E',
-           chars: "\u025B\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E\u1D07",
-         }, {
-           base: 'F',
-           chars: "\uA77C\u24BB\uFF26\u1E1E\u0191\uA77B",
-         }, {
-           base: 'G',
-           chars: "\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E\u0262",
-         }, {
-           base: 'H',
-           chars: "\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D",
-         }, {
-           base: 'I',
-           chars: "\u24BE\uFF29\xCC\xCD\xCE\u0128\u012A\u012C\u0130\xCF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197",
-         }, {
-           base: 'J',
-           chars: "\u24BF\uFF2A\u0134\u0248\u0237",
-         }, {
-           base: 'K',
-           chars: "\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2",
-         }, {
-           base: 'L',
-           chars: "\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780",
-         }, {
-           base: 'LJ',
-           chars: "\u01C7",
-         }, {
-           base: 'Lj',
-           chars: "\u01C8",
-         }, {
-           base: 'M',
-           chars: "\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C\u03FB",
-         }, {
-           base: 'N',
-           chars: "\uA7A4\u0220\u24C3\uFF2E\u01F8\u0143\xD1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u019D\uA790\u1D0E",
-         }, {
-           base: 'NJ',
-           chars: "\u01CA",
-         }, {
-           base: 'Nj',
-           chars: "\u01CB",
-         }, {
-           base: 'O',
-           chars: "\u24C4\uFF2F\xD2\xD3\xD4\u1ED2\u1ED0\u1ED6\u1ED4\xD5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\xD6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\xD8\u01FE\u0186\u019F\uA74A\uA74C",
-         }, {
-           base: 'OE',
-           chars: "\u0152",
-         }, {
-           base: 'OI',
-           chars: "\u01A2",
-         }, {
-           base: 'OO',
-           chars: "\uA74E",
-         }, {
-           base: 'OU',
-           chars: "\u0222",
-         }, {
-           base: 'P',
-           chars: "\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754",
-         }, {
-           base: 'Q',
-           chars: "\u24C6\uFF31\uA756\uA758\u024A",
-         }, {
-           base: 'R',
-           chars: "\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782",
-         }, {
-           base: 'S',
-           chars: "\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784",
-         }, {
-           base: 'T',
-           chars: "\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786",
-         }, {
-           base: 'Th',
-           chars: "\u00DE",
-         }, {
-           base: 'TZ',
-           chars: "\uA728",
-         }, {
-           base: 'U',
-           chars: "\u24CA\uFF35\xD9\xDA\xDB\u0168\u1E78\u016A\u1E7A\u016C\xDC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244",
-         }, {
-           base: 'V',
-           chars: "\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245",
-         }, {
-           base: 'VY',
-           chars: "\uA760",
-         }, {
-           base: 'W',
-           chars: "\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72",
-         }, {
-           base: 'X',
-           chars: "\u24CD\uFF38\u1E8A\u1E8C",
-         }, {
-           base: 'Y',
-           chars: "\u24CE\uFF39\u1EF2\xDD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE",
-         }, {
-           base: 'Z',
-           chars: "\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762",
-         }, {
-           base: 'a',
-           chars: "\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250\u0251",
-         }, {
-           base: 'aa',
-           chars: "\uA733",
-         }, {
-           base: 'ae',
-           chars: "\u00E6\u01FD\u01E3",
-         }, {
-           base: 'ao',
-           chars: "\uA735",
-         }, {
-           base: 'au',
-           chars: "\uA737",
-         }, {
-           base: 'av',
-           chars: "\uA739\uA73B",
-         }, {
-           base: 'ay',
-           chars: "\uA73D",
-         }, {
-           base: 'b',
-           chars: "\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253\u0182",
-         }, {
-           base: 'c',
-           chars: "\uFF43\u24D2\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184",
-         }, {
-           base: 'd',
-           chars: "\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\u018B\u13E7\u0501\uA7AA",
-         }, {
-           base: 'dh',
-           chars: "\u00F0",
-         }, {
-           base: 'dz',
-           chars: "\u01F3\u01C6",
-         }, {
-           base: 'e',
-           chars: "\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u01DD",
-         }, {
-           base: 'f',
-           chars: "\u24D5\uFF46\u1E1F\u0192",
-         }, {
-           base: 'ff',
-           chars: "\uFB00",
-         }, {
-           base: 'fi',
-           chars: "\uFB01",
-         }, {
-           base: 'fl',
-           chars: "\uFB02",
-         }, {
-           base: 'ffi',
-           chars: "\uFB03",
-         }, {
-           base: 'ffl',
-           chars: "\uFB04",
-         }, {
-           base: 'g',
-           chars: "\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\uA77F\u1D79",
-         }, {
-           base: 'h',
-           chars: "\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265",
-         }, {
-           base: 'hv',
-           chars: "\u0195",
-         }, {
-           base: 'i',
-           chars: "\u24D8\uFF49\xEC\xED\xEE\u0129\u012B\u012D\xEF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131",
-         }, {
-           base: 'j',
-           chars: "\u24D9\uFF4A\u0135\u01F0\u0249",
-         }, {
-           base: 'k',
-           chars: "\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3",
-         }, {
-           base: 'l',
-           chars: "\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747\u026D",
-         }, {
-           base: 'lj',
-           chars: "\u01C9",
-         }, {
-           base: 'm',
-           chars: "\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F",
-         }, {
-           base: 'n',
-           chars: "\u24DD\uFF4E\u01F9\u0144\xF1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5\u043B\u0509",
-         }, {
-           base: 'nj',
-           chars: "\u01CC",
-         }, {
-           base: 'o',
-           chars: "\u24DE\uFF4F\xF2\xF3\xF4\u1ED3\u1ED1\u1ED7\u1ED5\xF5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\xF6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\xF8\u01FF\uA74B\uA74D\u0275\u0254\u1D11",
-         }, {
-           base: 'oe',
-           chars: "\u0153",
-         }, {
-           base: 'oi',
-           chars: "\u01A3",
-         }, {
-           base: 'oo',
-           chars: "\uA74F",
-         }, {
-           base: 'ou',
-           chars: "\u0223",
-         }, {
-           base: 'p',
-           chars: "\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755\u03C1",
-         }, {
-           base: 'q',
-           chars: "\u24E0\uFF51\u024B\uA757\uA759",
-         }, {
-           base: 'r',
-           chars: "\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783",
-         }, {
-           base: 's',
-           chars: "\u24E2\uFF53\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B\u0282",
-         }, {
-           base: 'ss',
-           chars: "\xDF",
-         }, {
-           base: 't',
-           chars: "\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787",
-         }, {
-           base: 'th',
-           chars: "\u00FE",
-         }, {
-           base: 'tz',
-           chars: "\uA729",
-         }, {
-           base: 'u',
-           chars: "\u24E4\uFF55\xF9\xFA\xFB\u0169\u1E79\u016B\u1E7B\u016D\xFC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289",
-         }, {
-           base: 'v',
-           chars: "\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C",
-         }, {
-           base: 'vy',
-           chars: "\uA761",
-         }, {
-           base: 'w',
-           chars: "\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73",
-         }, {
-           base: 'x',
-           chars: "\u24E7\uFF58\u1E8B\u1E8D",
-         }, {
-           base: 'y',
-           chars: "\u24E8\uFF59\u1EF3\xFD\u0177\u1EF9\u0233\u1E8F\xFF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF",
-         }, {
-           base: 'z',
-           chars: "\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763",
-         }
-       ];
-
-       var diacriticsMap = {};
-       for (var i$1 = 0; i$1 < replacementList.length; i$1 += 1) {
-         var chars = replacementList[i$1].chars;
-         for (var j = 0; j < chars.length; j += 1) {
-           diacriticsMap[chars[j]] = replacementList[i$1].base;
-         }
-       }
-
-       function removeDiacritics(str) {
-         return str.replace(/[^\u0000-\u007e]/g, function(c) {
-           return diacriticsMap[c] || c;
-         });
-       }
-
-       var replacementList_1 = replacementList;
-       var diacriticsMap_1 = diacriticsMap;
-
-       var diacritics = {
-               remove: remove$1,
-               replacementList: replacementList_1,
-               diacriticsMap: diacriticsMap_1
-       };
-
-       var isArabic_1 = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
-       var arabicBlocks = [
-           [0x0600, 0x06FF],
-           [0x0750, 0x077F],
-           [0x08A0, 0x08FF],
-           [0xFB50, 0xFDFF],
-           [0xFE70, 0xFEFF],
-           [0x10E60, 0x10E7F],
-           [0x1EC70, 0x1ECBF],
-           [0x1EE00, 0x1EEFF] // Mathematical Alphabetic symbols https://www.unicode.org/charts/PDF/U1EE00.pdf
-       ];
-       function isArabic(char) {
-           if (char.length > 1) {
-               // allow the newer chars?
-               throw new Error('isArabic works on only one-character strings');
-           }
-           var code = char.charCodeAt(0);
-           for (var i = 0; i < arabicBlocks.length; i++) {
-               var block = arabicBlocks[i];
-               if (code >= block[0] && code <= block[1]) {
-                   return true;
-               }
-           }
-           return false;
-       }
-       exports.isArabic = isArabic;
-       function isMath(char) {
-           if (char.length > 2) {
-               // allow the newer chars?
-               throw new Error('isMath works on only one-character strings');
-           }
-           var code = char.charCodeAt(0);
-           return ((code >= 0x660 && code <= 0x66C) || (code >= 0x6F0 && code <= 0x6F9));
-       }
-       exports.isMath = isMath;
-       });
-
-       var unicodeArabic = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
-       var arabicReference = {
-           "alef": {
-               "normal": [
-                   "\u0627"
-               ],
-               "madda_above": {
-                   "normal": [
-                       "\u0627\u0653",
-                       "\u0622"
-                   ],
-                   "isolated": "\uFE81",
-                   "final": "\uFE82"
-               },
-               "hamza_above": {
-                   "normal": [
-                       "\u0627\u0654",
-                       "\u0623"
-                   ],
-                   "isolated": "\uFE83",
-                   "final": "\uFE84"
-               },
-               "hamza_below": {
-                   "normal": [
-                       "\u0627\u0655",
-                       "\u0625"
-                   ],
-                   "isolated": "\uFE87",
-                   "final": "\uFE88"
-               },
-               "wasla": {
-                   "normal": "\u0671",
-                   "isolated": "\uFB50",
-                   "final": "\uFB51"
-               },
-               "wavy_hamza_above": [
-                   "\u0672"
-               ],
-               "wavy_hamza_below": [
-                   "\u0627\u065F",
-                   "\u0673"
-               ],
-               "high_hamza": [
-                   "\u0675",
-                   "\u0627\u0674"
-               ],
-               "indic_two_above": [
-                   "\u0773"
-               ],
-               "indic_three_above": [
-                   "\u0774"
-               ],
-               "fathatan": {
-                   "normal": [
-                       "\u0627\u064B"
-                   ],
-                   "final": "\uFD3C",
-                   "isolated": "\uFD3D"
-               },
-               "isolated": "\uFE8D",
-               "final": "\uFE8E"
-           },
-           "beh": {
-               "normal": [
-                   "\u0628"
-               ],
-               "dotless": [
-                   "\u066E"
-               ],
-               "three_dots_horizontally_below": [
-                   "\u0750"
-               ],
-               "dot_below_three_dots_above": [
-                   "\u0751"
-               ],
-               "three_dots_pointing_upwards_below": [
-                   "\u0752"
-               ],
-               "three_dots_pointing_upwards_below_two_dots_above": [
-                   "\u0753"
-               ],
-               "two_dots_below_dot_above": [
-                   "\u0754"
-               ],
-               "inverted_small_v_below": [
-                   "\u0755"
-               ],
-               "small_v": [
-                   "\u0756"
-               ],
-               "small_v_below": [
-                   "\u08A0"
-               ],
-               "hamza_above": [
-                   "\u08A1"
-               ],
-               "small_meem_above": [
-                   "\u08B6"
-               ],
-               "isolated": "\uFE8F",
-               "final": "\uFE90",
-               "initial": "\uFE91",
-               "medial": "\uFE92"
-           },
-           "teh marbuta": {
-               "normal": [
-                   "\u0629"
-               ],
-               "isolated": "\uFE93",
-               "final": "\uFE94"
-           },
-           "teh": {
-               "normal": [
-                   "\u062A"
-               ],
-               "ring": [
-                   "\u067C"
-               ],
-               "three_dots_above_downwards": [
-                   "\u067D"
-               ],
-               "small_teh_above": [
-                   "\u08B8"
-               ],
-               "isolated": "\uFE95",
-               "final": "\uFE96",
-               "initial": "\uFE97",
-               "medial": "\uFE98"
-           },
-           "theh": {
-               "normal": [
-                   "\u062B"
-               ],
-               "isolated": "\uFE99",
-               "final": "\uFE9A",
-               "initial": "\uFE9B",
-               "medial": "\uFE9C"
-           },
-           "jeem": {
-               "normal": [
-                   "\u062C"
-               ],
-               "two_dots_above": [
-                   "\u08A2"
-               ],
-               "isolated": "\uFE9D",
-               "final": "\uFE9E",
-               "initial": "\uFE9F",
-               "medial": "\uFEA0"
-           },
-           "hah": {
-               "normal": [
-                   "\u062D"
-               ],
-               "hamza_above": [
-                   "\u0681"
-               ],
-               "two_dots_vertical_above": [
-                   "\u0682"
-               ],
-               "three_dots_above": [
-                   "\u0685"
-               ],
-               "two_dots_above": [
-                   "\u0757"
-               ],
-               "three_dots_pointing_upwards_below": [
-                   "\u0758"
-               ],
-               "small_tah_below": [
-                   "\u076E"
-               ],
-               "small_tah_two_dots": [
-                   "\u076F"
-               ],
-               "small_tah_above": [
-                   "\u0772"
-               ],
-               "indic_four_below": [
-                   "\u077C"
-               ],
-               "isolated": "\uFEA1",
-               "final": "\uFEA2",
-               "initial": "\uFEA3",
-               "medial": "\uFEA4"
-           },
-           "khah": {
-               "normal": [
-                   "\u062E"
-               ],
-               "isolated": "\uFEA5",
-               "final": "\uFEA6",
-               "initial": "\uFEA7",
-               "medial": "\uFEA8"
-           },
-           "dal": {
-               "normal": [
-                   "\u062F"
-               ],
-               "ring": [
-                   "\u0689"
-               ],
-               "dot_below": [
-                   "\u068A"
-               ],
-               "dot_below_small_tah": [
-                   "\u068B"
-               ],
-               "three_dots_above_downwards": [
-                   "\u068F"
-               ],
-               "four_dots_above": [
-                   "\u0690"
-               ],
-               "inverted_v": [
-                   "\u06EE"
-               ],
-               "two_dots_vertically_below_small_tah": [
-                   "\u0759"
-               ],
-               "inverted_small_v_below": [
-                   "\u075A"
-               ],
-               "three_dots_below": [
-                   "\u08AE"
-               ],
-               "isolated": "\uFEA9",
-               "final": "\uFEAA"
-           },
-           "thal": {
-               "normal": [
-                   "\u0630"
-               ],
-               "isolated": "\uFEAB",
-               "final": "\uFEAC"
-           },
-           "reh": {
-               "normal": [
-                   "\u0631"
-               ],
-               "small_v": [
-                   "\u0692"
-               ],
-               "ring": [
-                   "\u0693"
-               ],
-               "dot_below": [
-                   "\u0694"
-               ],
-               "small_v_below": [
-                   "\u0695"
-               ],
-               "dot_below_dot_above": [
-                   "\u0696"
-               ],
-               "two_dots_above": [
-                   "\u0697"
-               ],
-               "four_dots_above": [
-                   "\u0699"
-               ],
-               "inverted_v": [
-                   "\u06EF"
-               ],
-               "stroke": [
-                   "\u075B"
-               ],
-               "two_dots_vertically_above": [
-                   "\u076B"
-               ],
-               "hamza_above": [
-                   "\u076C"
-               ],
-               "small_tah_two_dots": [
-                   "\u0771"
-               ],
-               "loop": [
-                   "\u08AA"
-               ],
-               "small_noon_above": [
-                   "\u08B9"
-               ],
-               "isolated": "\uFEAD",
-               "final": "\uFEAE"
-           },
-           "zain": {
-               "normal": [
-                   "\u0632"
-               ],
-               "inverted_v_above": [
-                   "\u08B2"
-               ],
-               "isolated": "\uFEAF",
-               "final": "\uFEB0"
-           },
-           "seen": {
-               "normal": [
-                   "\u0633"
-               ],
-               "dot_below_dot_above": [
-                   "\u069A"
-               ],
-               "three_dots_below": [
-                   "\u069B"
-               ],
-               "three_dots_below_three_dots_above": [
-                   "\u069C"
-               ],
-               "four_dots_above": [
-                   "\u075C"
-               ],
-               "two_dots_vertically_above": [
-                   "\u076D"
-               ],
-               "small_tah_two_dots": [
-                   "\u0770"
-               ],
-               "indic_four_above": [
-                   "\u077D"
-               ],
-               "inverted_v": [
-                   "\u077E"
-               ],
-               "isolated": "\uFEB1",
-               "final": "\uFEB2",
-               "initial": "\uFEB3",
-               "medial": "\uFEB4"
-           },
-           "sheen": {
-               "normal": [
-                   "\u0634"
-               ],
-               "dot_below": [
-                   "\u06FA"
-               ],
-               "isolated": "\uFEB5",
-               "final": "\uFEB6",
-               "initial": "\uFEB7",
-               "medial": "\uFEB8"
-           },
-           "sad": {
-               "normal": [
-                   "\u0635"
-               ],
-               "two_dots_below": [
-                   "\u069D"
-               ],
-               "three_dots_above": [
-                   "\u069E"
-               ],
-               "three_dots_below": [
-                   "\u08AF"
-               ],
-               "isolated": "\uFEB9",
-               "final": "\uFEBA",
-               "initial": "\uFEBB",
-               "medial": "\uFEBC"
-           },
-           "dad": {
-               "normal": [
-                   "\u0636"
-               ],
-               "dot_below": [
-                   "\u06FB"
-               ],
-               "isolated": "\uFEBD",
-               "final": "\uFEBE",
-               "initial": "\uFEBF",
-               "medial": "\uFEC0"
-           },
-           "tah": {
-               "normal": [
-                   "\u0637"
-               ],
-               "three_dots_above": [
-                   "\u069F"
-               ],
-               "two_dots_above": [
-                   "\u08A3"
-               ],
-               "isolated": "\uFEC1",
-               "final": "\uFEC2",
-               "initial": "\uFEC3",
-               "medial": "\uFEC4"
-           },
-           "zah": {
-               "normal": [
-                   "\u0638"
-               ],
-               "isolated": "\uFEC5",
-               "final": "\uFEC6",
-               "initial": "\uFEC7",
-               "medial": "\uFEC8"
-           },
-           "ain": {
-               "normal": [
-                   "\u0639"
-               ],
-               "three_dots_above": [
-                   "\u06A0"
-               ],
-               "two_dots_above": [
-                   "\u075D"
-               ],
-               "three_dots_pointing_downwards_above": [
-                   "\u075E"
-               ],
-               "two_dots_vertically_above": [
-                   "\u075F"
-               ],
-               "three_dots_below": [
-                   "\u08B3"
-               ],
-               "isolated": "\uFEC9",
-               "final": "\uFECA",
-               "initial": "\uFECB",
-               "medial": "\uFECC"
-           },
-           "ghain": {
-               "normal": [
-                   "\u063A"
-               ],
-               "dot_below": [
-                   "\u06FC"
-               ],
-               "isolated": "\uFECD",
-               "final": "\uFECE",
-               "initial": "\uFECF",
-               "medial": "\uFED0"
-           },
-           "feh": {
-               "normal": [
-                   "\u0641"
-               ],
-               "dotless": [
-                   "\u06A1"
-               ],
-               "dot_moved_below": [
-                   "\u06A2"
-               ],
-               "dot_below": [
-                   "\u06A3"
-               ],
-               "three_dots_below": [
-                   "\u06A5"
-               ],
-               "two_dots_below": [
-                   "\u0760"
-               ],
-               "three_dots_pointing_upwards_below": [
-                   "\u0761"
-               ],
-               "dot_below_three_dots_above": [
-                   "\u08A4"
-               ],
-               "isolated": "\uFED1",
-               "final": "\uFED2",
-               "initial": "\uFED3",
-               "medial": "\uFED4"
-           },
-           "qaf": {
-               "normal": [
-                   "\u0642"
-               ],
-               "dotless": [
-                   "\u066F"
-               ],
-               "dot_above": [
-                   "\u06A7"
-               ],
-               "three_dots_above": [
-                   "\u06A8"
-               ],
-               "dot_below": [
-                   "\u08A5"
-               ],
-               "isolated": "\uFED5",
-               "final": "\uFED6",
-               "initial": "\uFED7",
-               "medial": "\uFED8"
-           },
-           "kaf": {
-               "normal": [
-                   "\u0643"
-               ],
-               "swash": [
-                   "\u06AA"
-               ],
-               "ring": [
-                   "\u06AB"
-               ],
-               "dot_above": [
-                   "\u06AC"
-               ],
-               "three_dots_below": [
-                   "\u06AE"
-               ],
-               "two_dots_above": [
-                   "\u077F"
-               ],
-               "dot_below": [
-                   "\u08B4"
-               ],
-               "isolated": "\uFED9",
-               "final": "\uFEDA",
-               "initial": "\uFEDB",
-               "medial": "\uFEDC"
-           },
-           "lam": {
-               "normal": [
-                   "\u0644"
-               ],
-               "small_v": [
-                   "\u06B5"
-               ],
-               "dot_above": [
-                   "\u06B6"
-               ],
-               "three_dots_above": [
-                   "\u06B7"
-               ],
-               "three_dots_below": [
-                   "\u06B8"
-               ],
-               "bar": [
-                   "\u076A"
-               ],
-               "double_bar": [
-                   "\u08A6"
-               ],
-               "isolated": "\uFEDD",
-               "final": "\uFEDE",
-               "initial": "\uFEDF",
-               "medial": "\uFEE0"
-           },
-           "meem": {
-               "normal": [
-                   "\u0645"
-               ],
-               "dot_above": [
-                   "\u0765"
-               ],
-               "dot_below": [
-                   "\u0766"
-               ],
-               "three_dots_above": [
-                   "\u08A7"
-               ],
-               "isolated": "\uFEE1",
-               "final": "\uFEE2",
-               "initial": "\uFEE3",
-               "medial": "\uFEE4"
-           },
-           "noon": {
-               "normal": [
-                   "\u0646"
-               ],
-               "dot_below": [
-                   "\u06B9"
-               ],
-               "ring": [
-                   "\u06BC"
-               ],
-               "three_dots_above": [
-                   "\u06BD"
-               ],
-               "two_dots_below": [
-                   "\u0767"
-               ],
-               "small_tah": [
-                   "\u0768"
-               ],
-               "small_v": [
-                   "\u0769"
-               ],
-               "isolated": "\uFEE5",
-               "final": "\uFEE6",
-               "initial": "\uFEE7",
-               "medial": "\uFEE8"
-           },
-           "heh": {
-               "normal": [
-                   "\u0647"
-               ],
-               "isolated": "\uFEE9",
-               "final": "\uFEEA",
-               "initial": "\uFEEB",
-               "medial": "\uFEEC"
-           },
-           "waw": {
-               "normal": [
-                   "\u0648"
-               ],
-               "hamza_above": {
-                   "normal": [
-                       "\u0624",
-                       "\u0648\u0654"
-                   ],
-                   "isolated": "\uFE85",
-                   "final": "\uFE86"
-               },
-               "high_hamza": [
-                   "\u0676",
-                   "\u0648\u0674"
-               ],
-               "ring": [
-                   "\u06C4"
-               ],
-               "two_dots_above": [
-                   "\u06CA"
-               ],
-               "dot_above": [
-                   "\u06CF"
-               ],
-               "indic_two_above": [
-                   "\u0778"
-               ],
-               "indic_three_above": [
-                   "\u0779"
-               ],
-               "dot_within": [
-                   "\u08AB"
-               ],
-               "isolated": "\uFEED",
-               "final": "\uFEEE"
-           },
-           "alef_maksura": {
-               "normal": [
-                   "\u0649"
-               ],
-               "hamza_above": [
-                   "\u0626",
-                   "\u064A\u0654"
-               ],
-               "initial": "\uFBE8",
-               "medial": "\uFBE9",
-               "isolated": "\uFEEF",
-               "final": "\uFEF0"
-           },
-           "yeh": {
-               "normal": [
-                   "\u064A"
-               ],
-               "hamza_above": {
-                   "normal": [
-                       "\u0626",
-                       "\u0649\u0654"
-                   ],
-                   "isolated": "\uFE89",
-                   "final": "\uFE8A",
-                   "initial": "\uFE8B",
-                   "medial": "\uFE8C"
-               },
-               "two_dots_below_hamza_above": [
-                   "\u08A8"
-               ],
-               "high_hamza": [
-                   "\u0678",
-                   "\u064A\u0674"
-               ],
-               "tail": [
-                   "\u06CD"
-               ],
-               "small_v": [
-                   "\u06CE"
-               ],
-               "three_dots_below": [
-                   "\u06D1"
-               ],
-               "two_dots_below_dot_above": [
-                   "\u08A9"
-               ],
-               "two_dots_below_small_noon_above": [
-                   "\u08BA"
-               ],
-               "isolated": "\uFEF1",
-               "final": "\uFEF2",
-               "initial": "\uFEF3",
-               "medial": "\uFEF4"
-           },
-           "tteh": {
-               "normal": [
-                   "\u0679"
-               ],
-               "isolated": "\uFB66",
-               "final": "\uFB67",
-               "initial": "\uFB68",
-               "medial": "\uFB69"
-           },
-           "tteheh": {
-               "normal": [
-                   "\u067A"
-               ],
-               "isolated": "\uFB5E",
-               "final": "\uFB5F",
-               "initial": "\uFB60",
-               "medial": "\uFB61"
-           },
-           "beeh": {
-               "normal": [
-                   "\u067B"
-               ],
-               "isolated": "\uFB52",
-               "final": "\uFB53",
-               "initial": "\uFB54",
-               "medial": "\uFB55"
-           },
-           "peh": {
-               "normal": [
-                   "\u067E"
-               ],
-               "small_meem_above": [
-                   "\u08B7"
-               ],
-               "isolated": "\uFB56",
-               "final": "\uFB57",
-               "initial": "\uFB58",
-               "medial": "\uFB59"
-           },
-           "teheh": {
-               "normal": [
-                   "\u067F"
-               ],
-               "isolated": "\uFB62",
-               "final": "\uFB63",
-               "initial": "\uFB64",
-               "medial": "\uFB65"
-           },
-           "beheh": {
-               "normal": [
-                   "\u0680"
-               ],
-               "isolated": "\uFB5A",
-               "final": "\uFB5B",
-               "initial": "\uFB5C",
-               "medial": "\uFB5D"
-           },
-           "nyeh": {
-               "normal": [
-                   "\u0683"
-               ],
-               "isolated": "\uFB76",
-               "final": "\uFB77",
-               "initial": "\uFB78",
-               "medial": "\uFB79"
-           },
-           "dyeh": {
-               "normal": [
-                   "\u0684"
-               ],
-               "isolated": "\uFB72",
-               "final": "\uFB73",
-               "initial": "\uFB74",
-               "medial": "\uFB75"
-           },
-           "tcheh": {
-               "normal": [
-                   "\u0686"
-               ],
-               "dot_above": [
-                   "\u06BF"
-               ],
-               "isolated": "\uFB7A",
-               "final": "\uFB7B",
-               "initial": "\uFB7C",
-               "medial": "\uFB7D"
-           },
-           "tcheheh": {
-               "normal": [
-                   "\u0687"
-               ],
-               "isolated": "\uFB7E",
-               "final": "\uFB7F",
-               "initial": "\uFB80",
-               "medial": "\uFB81"
-           },
-           "ddal": {
-               "normal": [
-                   "\u0688"
-               ],
-               "isolated": "\uFB88",
-               "final": "\uFB89"
-           },
-           "dahal": {
-               "normal": [
-                   "\u068C"
-               ],
-               "isolated": "\uFB84",
-               "final": "\uFB85"
-           },
-           "ddahal": {
-               "normal": [
-                   "\u068D"
-               ],
-               "isolated": "\uFB82",
-               "final": "\uFB83"
-           },
-           "dul": {
-               "normal": [
-                   "\u068F",
-                   "\u068E"
-               ],
-               "isolated": "\uFB86",
-               "final": "\uFB87"
-           },
-           "rreh": {
-               "normal": [
-                   "\u0691"
-               ],
-               "isolated": "\uFB8C",
-               "final": "\uFB8D"
-           },
-           "jeh": {
-               "normal": [
-                   "\u0698"
-               ],
-               "isolated": "\uFB8A",
-               "final": "\uFB8B"
-           },
-           "veh": {
-               "normal": [
-                   "\u06A4"
-               ],
-               "isolated": "\uFB6A",
-               "final": "\uFB6B",
-               "initial": "\uFB6C",
-               "medial": "\uFB6D"
-           },
-           "peheh": {
-               "normal": [
-                   "\u06A6"
-               ],
-               "isolated": "\uFB6E",
-               "final": "\uFB6F",
-               "initial": "\uFB70",
-               "medial": "\uFB71"
-           },
-           "keheh": {
-               "normal": [
-                   "\u06A9"
-               ],
-               "dot_above": [
-                   "\u0762"
-               ],
-               "three_dots_above": [
-                   "\u0763"
-               ],
-               "three_dots_pointing_upwards_below": [
-                   "\u0764"
-               ],
-               "isolated": "\uFB8E",
-               "final": "\uFB8F",
-               "initial": "\uFB90",
-               "medial": "\uFB91"
-           },
-           "ng": {
-               "normal": [
-                   "\u06AD"
-               ],
-               "isolated": "\uFBD3",
-               "final": "\uFBD4",
-               "initial": "\uFBD5",
-               "medial": "\uFBD6"
-           },
-           "gaf": {
-               "normal": [
-                   "\u06AF"
-               ],
-               "ring": [
-                   "\u06B0"
-               ],
-               "two_dots_below": [
-                   "\u06B2"
-               ],
-               "three_dots_above": [
-                   "\u06B4"
-               ],
-               "inverted_stroke": [
-                   "\u08B0"
-               ],
-               "isolated": "\uFB92",
-               "final": "\uFB93",
-               "initial": "\uFB94",
-               "medial": "\uFB95"
-           },
-           "ngoeh": {
-               "normal": [
-                   "\u06B1"
-               ],
-               "isolated": "\uFB9A",
-               "final": "\uFB9B",
-               "initial": "\uFB9C",
-               "medial": "\uFB9D"
-           },
-           "gueh": {
-               "normal": [
-                   "\u06B3"
-               ],
-               "isolated": "\uFB96",
-               "final": "\uFB97",
-               "initial": "\uFB98",
-               "medial": "\uFB99"
-           },
-           "noon ghunna": {
-               "normal": [
-                   "\u06BA"
-               ],
-               "isolated": "\uFB9E",
-               "final": "\uFB9F"
-           },
-           "rnoon": {
-               "normal": [
-                   "\u06BB"
-               ],
-               "isolated": "\uFBA0",
-               "final": "\uFBA1",
-               "initial": "\uFBA2",
-               "medial": "\uFBA3"
-           },
-           "heh doachashmee": {
-               "normal": [
-                   "\u06BE"
-               ],
-               "isolated": "\uFBAA",
-               "final": "\uFBAB",
-               "initial": "\uFBAC",
-               "medial": "\uFBAD"
-           },
-           "heh goal": {
-               "normal": [
-                   "\u06C1"
-               ],
-               "hamza_above": [
-                   "\u06C1\u0654",
-                   "\u06C2"
-               ],
-               "isolated": "\uFBA6",
-               "final": "\uFBA7",
-               "initial": "\uFBA8",
-               "medial": "\uFBA9"
-           },
-           "teh marbuta goal": {
-               "normal": [
-                   "\u06C3"
-               ]
-           },
-           "kirghiz oe": {
-               "normal": [
-                   "\u06C5"
-               ],
-               "isolated": "\uFBE0",
-               "final": "\uFBE1"
-           },
-           "oe": {
-               "normal": [
-                   "\u06C6"
-               ],
-               "isolated": "\uFBD9",
-               "final": "\uFBDA"
-           },
-           "u": {
-               "normal": [
-                   "\u06C7"
-               ],
-               "hamza_above": {
-                   "normal": [
-                       "\u0677",
-                       "\u06C7\u0674"
-                   ],
-                   "isolated": "\uFBDD"
-               },
-               "isolated": "\uFBD7",
-               "final": "\uFBD8"
-           },
-           "yu": {
-               "normal": [
-                   "\u06C8"
-               ],
-               "isolated": "\uFBDB",
-               "final": "\uFBDC"
-           },
-           "kirghiz yu": {
-               "normal": [
-                   "\u06C9"
-               ],
-               "isolated": "\uFBE2",
-               "final": "\uFBE3"
-           },
-           "ve": {
-               "normal": [
-                   "\u06CB"
-               ],
-               "isolated": "\uFBDE",
-               "final": "\uFBDF"
-           },
-           "farsi yeh": {
-               "normal": [
-                   "\u06CC"
-               ],
-               "indic_two_above": [
-                   "\u0775"
-               ],
-               "indic_three_above": [
-                   "\u0776"
-               ],
-               "indic_four_above": [
-                   "\u0777"
-               ],
-               "isolated": "\uFBFC",
-               "final": "\uFBFD",
-               "initial": "\uFBFE",
-               "medial": "\uFBFF"
-           },
-           "e": {
-               "normal": [
-                   "\u06D0"
-               ],
-               "isolated": "\uFBE4",
-               "final": "\uFBE5",
-               "initial": "\uFBE6",
-               "medial": "\uFBE7"
-           },
-           "yeh barree": {
-               "normal": [
-                   "\u06D2"
-               ],
-               "hamza_above": {
-                   "normal": [
-                       "\u06D2\u0654",
-                       "\u06D3"
-                   ],
-                   "isolated": "\uFBB0",
-                   "final": "\uFBB1"
-               },
-               "indic_two_above": [
-                   "\u077A"
-               ],
-               "indic_three_above": [
-                   "\u077B"
-               ],
-               "isolated": "\uFBAE",
-               "final": "\uFBAF"
-           },
-           "ae": {
-               "normal": [
-                   "\u06D5"
-               ],
-               "isolated": "\u06D5",
-               "final": "\uFEEA",
-               "yeh_above": {
-                   "normal": [
-                       "\u06C0",
-                       "\u06D5\u0654"
-                   ],
-                   "isolated": "\uFBA4",
-                   "final": "\uFBA5"
-               }
-           },
-           "rohingya yeh": {
-               "normal": [
-                   "\u08AC"
-               ]
-           },
-           "low alef": {
-               "normal": [
-                   "\u08AD"
-               ]
-           },
-           "straight waw": {
-               "normal": [
-                   "\u08B1"
-               ]
-           },
-           "african feh": {
-               "normal": [
-                   "\u08BB"
-               ]
-           },
-           "african qaf": {
-               "normal": [
-                   "\u08BC"
-               ]
-           },
-           "african noon": {
-               "normal": [
-                   "\u08BD"
-               ]
-           }
-       };
-       exports.default = arabicReference;
-       });
-
-       var unicodeLigatures = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
-       var ligatureReference = {
-           "\u0626\u0627": {
-               "isolated": "\uFBEA",
-               "final": "\uFBEB"
-           },
-           "\u0626\u06D5": {
-               "isolated": "\uFBEC",
-               "final": "\uFBED"
-           },
-           "\u0626\u0648": {
-               "isolated": "\uFBEE",
-               "final": "\uFBEF"
-           },
-           "\u0626\u06C7": {
-               "isolated": "\uFBF0",
-               "final": "\uFBF1"
-           },
-           "\u0626\u06C6": {
-               "isolated": "\uFBF2",
-               "final": "\uFBF3"
-           },
-           "\u0626\u06C8": {
-               "isolated": "\uFBF4",
-               "final": "\uFBF5"
-           },
-           "\u0626\u06D0": {
-               "isolated": "\uFBF6",
-               "final": "\uFBF7",
-               "initial": "\uFBF8"
-           },
-           "\u0626\u0649": {
-               "uighur_kirghiz": {
-                   "isolated": "\uFBF9",
-                   "final": "\uFBFA",
-                   "initial": "\uFBFB"
-               },
-               "isolated": "\uFC03",
-               "final": "\uFC68"
-           },
-           "\u0626\u062C": {
-               "isolated": "\uFC00",
-               "initial": "\uFC97"
-           },
-           "\u0626\u062D": {
-               "isolated": "\uFC01",
-               "initial": "\uFC98"
-           },
-           "\u0626\u0645": {
-               "isolated": "\uFC02",
-               "final": "\uFC66",
-               "initial": "\uFC9A",
-               "medial": "\uFCDF"
-           },
-           "\u0626\u064A": {
-               "isolated": "\uFC04",
-               "final": "\uFC69"
-           },
-           "\u0628\u062C": {
-               "isolated": "\uFC05",
-               "initial": "\uFC9C"
-           },
-           "\u0628\u062D": {
-               "isolated": "\uFC06",
-               "initial": "\uFC9D"
-           },
-           "\u0628\u062E": {
-               "isolated": "\uFC07",
-               "initial": "\uFC9E"
-           },
-           "\u0628\u0645": {
-               "isolated": "\uFC08",
-               "final": "\uFC6C",
-               "initial": "\uFC9F",
-               "medial": "\uFCE1"
-           },
-           "\u0628\u0649": {
-               "isolated": "\uFC09",
-               "final": "\uFC6E"
-           },
-           "\u0628\u064A": {
-               "isolated": "\uFC0A",
-               "final": "\uFC6F"
-           },
-           "\u062A\u062C": {
-               "isolated": "\uFC0B",
-               "initial": "\uFCA1"
-           },
-           "\u062A\u062D": {
-               "isolated": "\uFC0C",
-               "initial": "\uFCA2"
-           },
-           "\u062A\u062E": {
-               "isolated": "\uFC0D",
-               "initial": "\uFCA3"
-           },
-           "\u062A\u0645": {
-               "isolated": "\uFC0E",
-               "final": "\uFC72",
-               "initial": "\uFCA4",
-               "medial": "\uFCE3"
-           },
-           "\u062A\u0649": {
-               "isolated": "\uFC0F",
-               "final": "\uFC74"
-           },
-           "\u062A\u064A": {
-               "isolated": "\uFC10",
-               "final": "\uFC75"
-           },
-           "\u062B\u062C": {
-               "isolated": "\uFC11"
-           },
-           "\u062B\u0645": {
-               "isolated": "\uFC12",
-               "final": "\uFC78",
-               "initial": "\uFCA6",
-               "medial": "\uFCE5"
-           },
-           "\u062B\u0649": {
-               "isolated": "\uFC13",
-               "final": "\uFC7A"
-           },
-           "\u062B\u0648": {
-               "isolated": "\uFC14"
-           },
-           "\u062C\u062D": {
-               "isolated": "\uFC15",
-               "initial": "\uFCA7"
-           },
-           "\u062C\u0645": {
-               "isolated": "\uFC16",
-               "initial": "\uFCA8"
-           },
-           "\u062D\u062C": {
-               "isolated": "\uFC17",
-               "initial": "\uFCA9"
-           },
-           "\u062D\u0645": {
-               "isolated": "\uFC18",
-               "initial": "\uFCAA"
-           },
-           "\u062E\u062C": {
-               "isolated": "\uFC19",
-               "initial": "\uFCAB"
-           },
-           "\u062E\u062D": {
-               "isolated": "\uFC1A"
-           },
-           "\u062E\u0645": {
-               "isolated": "\uFC1B",
-               "initial": "\uFCAC"
-           },
-           "\u0633\u062C": {
-               "isolated": "\uFC1C",
-               "initial": "\uFCAD",
-               "medial": "\uFD34"
-           },
-           "\u0633\u062D": {
-               "isolated": "\uFC1D",
-               "initial": "\uFCAE",
-               "medial": "\uFD35"
-           },
-           "\u0633\u062E": {
-               "isolated": "\uFC1E",
-               "initial": "\uFCAF",
-               "medial": "\uFD36"
-           },
-           "\u0633\u0645": {
-               "isolated": "\uFC1F",
-               "initial": "\uFCB0",
-               "medial": "\uFCE7"
-           },
-           "\u0635\u062D": {
-               "isolated": "\uFC20",
-               "initial": "\uFCB1"
-           },
-           "\u0635\u0645": {
-               "isolated": "\uFC21",
-               "initial": "\uFCB3"
-           },
-           "\u0636\u062C": {
-               "isolated": "\uFC22",
-               "initial": "\uFCB4"
-           },
-           "\u0636\u062D": {
-               "isolated": "\uFC23",
-               "initial": "\uFCB5"
-           },
-           "\u0636\u062E": {
-               "isolated": "\uFC24",
-               "initial": "\uFCB6"
-           },
-           "\u0636\u0645": {
-               "isolated": "\uFC25",
-               "initial": "\uFCB7"
-           },
-           "\u0637\u062D": {
-               "isolated": "\uFC26",
-               "initial": "\uFCB8"
-           },
-           "\u0637\u0645": {
-               "isolated": "\uFC27",
-               "initial": "\uFD33",
-               "medial": "\uFD3A"
-           },
-           "\u0638\u0645": {
-               "isolated": "\uFC28",
-               "initial": "\uFCB9",
-               "medial": "\uFD3B"
-           },
-           "\u0639\u062C": {
-               "isolated": "\uFC29",
-               "initial": "\uFCBA"
-           },
-           "\u0639\u0645": {
-               "isolated": "\uFC2A",
-               "initial": "\uFCBB"
-           },
-           "\u063A\u062C": {
-               "isolated": "\uFC2B",
-               "initial": "\uFCBC"
-           },
-           "\u063A\u0645": {
-               "isolated": "\uFC2C",
-               "initial": "\uFCBD"
-           },
-           "\u0641\u062C": {
-               "isolated": "\uFC2D",
-               "initial": "\uFCBE"
-           },
-           "\u0641\u062D": {
-               "isolated": "\uFC2E",
-               "initial": "\uFCBF"
-           },
-           "\u0641\u062E": {
-               "isolated": "\uFC2F",
-               "initial": "\uFCC0"
-           },
-           "\u0641\u0645": {
-               "isolated": "\uFC30",
-               "initial": "\uFCC1"
-           },
-           "\u0641\u0649": {
-               "isolated": "\uFC31",
-               "final": "\uFC7C"
-           },
-           "\u0641\u064A": {
-               "isolated": "\uFC32",
-               "final": "\uFC7D"
-           },
-           "\u0642\u062D": {
-               "isolated": "\uFC33",
-               "initial": "\uFCC2"
-           },
-           "\u0642\u0645": {
-               "isolated": "\uFC34",
-               "initial": "\uFCC3"
-           },
-           "\u0642\u0649": {
-               "isolated": "\uFC35",
-               "final": "\uFC7E"
-           },
-           "\u0642\u064A": {
-               "isolated": "\uFC36",
-               "final": "\uFC7F"
-           },
-           "\u0643\u0627": {
-               "isolated": "\uFC37",
-               "final": "\uFC80"
-           },
-           "\u0643\u062C": {
-               "isolated": "\uFC38",
-               "initial": "\uFCC4"
-           },
-           "\u0643\u062D": {
-               "isolated": "\uFC39",
-               "initial": "\uFCC5"
-           },
-           "\u0643\u062E": {
-               "isolated": "\uFC3A",
-               "initial": "\uFCC6"
-           },
-           "\u0643\u0644": {
-               "isolated": "\uFC3B",
-               "final": "\uFC81",
-               "initial": "\uFCC7",
-               "medial": "\uFCEB"
-           },
-           "\u0643\u0645": {
-               "isolated": "\uFC3C",
-               "final": "\uFC82",
-               "initial": "\uFCC8",
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-           },
-           "words": {
-               "\u0635\u0644\u06D2": "\uFDF0",
-               "\u0642\u0644\u06D2": "\uFDF1",
-               "\u0627\u0644\u0644\u0647": "\uFDF2",
-               "\u0627\u0643\u0628\u0631": "\uFDF3",
-               "\u0645\u062D\u0645\u062F": "\uFDF4",
-               "\u0635\u0644\u0639\u0645": "\uFDF5",
-               "\u0631\u0633\u0648\u0644": "\uFDF6",
-               "\u0639\u0644\u064A\u0647": "\uFDF7",
-               "\u0648\u0633\u0644\u0645": "\uFDF8",
-               "\u0635\u0644\u0649": "\uFDF9",
-               "\u0635\u0644\u0649\u0627\u0644\u0644\u0647\u0639\u0644\u064A\u0647\u0648\u0633\u0644\u0645": "\uFDFA",
-               "\u062C\u0644\u062C\u0644\u0627\u0644\u0647": "\uFDFB",
-               "\u0631\u06CC\u0627\u0644": "\uFDFC"
-           }
-       };
-       exports.default = ligatureReference;
-       });
-
-       var reference = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
-
-
-       var letterList = Object.keys(unicodeArabic.default);
-       exports.letterList = letterList;
-       var ligatureList = Object.keys(unicodeLigatures.default);
-       exports.ligatureList = ligatureList;
-       var ligatureWordList = Object.keys(unicodeLigatures.default.words);
-       exports.ligatureWordList = ligatureWordList;
-       var lams = '\u0644\u06B5\u06B6\u06B7\u06B8';
-       exports.lams = lams;
-       var alefs = '\u0627\u0622\u0623\u0625\u0671\u0672\u0673\u0675\u0773\u0774';
-       exports.alefs = alefs;
-       // for (var l = 1; l < lams.length; l++) {
-       //   console.log('-');
-       //   for (var a = 0; a < alefs.length; a++) {
-       //     console.log(a + ': ' + lams[l] + alefs[a]);
-       //   }
-       // }
-       var tashkeel = '\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8';
-       exports.tashkeel = tashkeel;
-       function addToTashkeel(start, finish) {
-           for (var i = start; i <= finish; i++) {
-               exports.tashkeel = tashkeel += String.fromCharCode(i);
-           }
-       }
-       addToTashkeel(0x0610, 0x061A);
-       addToTashkeel(0x064B, 0x065F);
-       addToTashkeel(0x06D6, 0x06DC);
-       addToTashkeel(0x06E0, 0x06E4);
-       addToTashkeel(0x06EA, 0x06ED);
-       addToTashkeel(0x08D3, 0x08E1);
-       addToTashkeel(0x08E3, 0x08FF);
-       addToTashkeel(0xFE70, 0xFE7F);
-       var lineBreakers = '\u0627\u0629\u0648\u06C0\u06CF\u06FD\u06FE\u076B\u076C\u0771\u0773\u0774\u0778\u0779\u08E2\u08B1\u08B2\u08B9';
-       exports.lineBreakers = lineBreakers;
-       function addToLineBreakers(start, finish) {
-           for (var i = start; i <= finish; i++) {
-               exports.lineBreakers = lineBreakers += String.fromCharCode(i);
-           }
-       }
-       addToLineBreakers(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored
-       addToLineBreakers(0x0621, 0x0625);
-       addToLineBreakers(0x062F, 0x0632);
-       addToLineBreakers(0x0660, 0x066D); // numerals, math
-       addToLineBreakers(0x0671, 0x0677);
-       addToLineBreakers(0x0688, 0x0699);
-       addToLineBreakers(0x06C3, 0x06CB);
-       addToLineBreakers(0x06D2, 0x06F9);
-       addToLineBreakers(0x0759, 0x075B);
-       addToLineBreakers(0x08AA, 0x08AE);
-       addToLineBreakers(0xFB50, 0xFDFD); // presentation forms look like they could connect, but never do
-       // Presentation Forms A includes diacritics but they are meant to stand alone
-       addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
-       // numerals, math
-       addToLineBreakers(0x10E60, 0x10E7F);
-       addToLineBreakers(0x1EC70, 0x1ECBF);
-       addToLineBreakers(0x1EE00, 0x1EEFF);
-       });
-
-       var GlyphSplitter_1 = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
-
-
-       function GlyphSplitter(word) {
-           var letters = [];
-           var lastLetter = '';
-           word.split('').forEach(function (letter) {
-               if (isArabic_1.isArabic(letter)) {
-                   if (reference.tashkeel.indexOf(letter) > -1) {
-                       letters[letters.length - 1] += letter;
-                   }
-                   else if (lastLetter.length && ((reference.lams.indexOf(lastLetter) === 0 && reference.alefs.indexOf(letter) > -1) || (reference.lams.indexOf(lastLetter) > 0 && reference.alefs.indexOf(letter) === 0))) {
-                       // valid LA forms
-                       letters[letters.length - 1] += letter;
-                   }
-                   else {
-                       letters.push(letter);
-                   }
-               }
-               else {
-                   letters.push(letter);
-               }
-               if (reference.tashkeel.indexOf(letter) === -1) {
-                   lastLetter = letter;
-               }
-           });
-           return letters;
-       }
-       exports.GlyphSplitter = GlyphSplitter;
-       });
-
-       var BaselineSplitter_1 = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
-
-
-       function BaselineSplitter(word) {
-           var letters = [];
-           var lastLetter = '';
-           word.split('').forEach(function (letter) {
-               if (isArabic_1.isArabic(letter) && isArabic_1.isArabic(lastLetter)) {
-                   if (lastLetter.length && reference.tashkeel.indexOf(letter) > -1) {
-                       letters[letters.length - 1] += letter;
-                   }
-                   else if (reference.lineBreakers.indexOf(lastLetter) > -1) {
-                       letters.push(letter);
-                   }
-                   else {
-                       letters[letters.length - 1] += letter;
-                   }
-               }
-               else {
-                   letters.push(letter);
-               }
-               if (reference.tashkeel.indexOf(letter) === -1) {
-                   // don't allow tashkeel to hide line break
-                   lastLetter = letter;
-               }
-           });
-           return letters;
-       }
-       exports.BaselineSplitter = BaselineSplitter;
-       });
-
-       var Normalization = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
-
-
-
-
-       function Normal(word, breakPresentationForm) {
-           // default is to turn initial/isolated/medial/final presentation form to generic
-           if (typeof breakPresentationForm === 'undefined') {
-               breakPresentationForm = true;
-           }
-           var returnable = '';
-           word.split('').forEach(function (letter) {
-               if (!isArabic_1.isArabic(letter)) {
-                   returnable += letter;
-                   return;
-               }
-               for (var w = 0; w < reference.letterList.length; w++) {
-                   // ok so we are checking this potential lettertron
-                   var letterForms = unicodeArabic.default[reference.letterList[w]];
-                   var versions = Object.keys(letterForms);
-                   for (var v = 0; v < versions.length; v++) {
-                       var localVersion = letterForms[versions[v]];
-                       if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-                           // look at this embedded object
-                           var embeddedForms = Object.keys(localVersion);
-                           for (var ef = 0; ef < embeddedForms.length; ef++) {
-                               var form = localVersion[embeddedForms[ef]];
-                               if (form === letter || (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1)) {
-                                   // match
-                                   // console.log('embedded match');
-                                   if (form === letter) {
-                                       // match exact
-                                       if (breakPresentationForm && localVersion['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(embeddedForms[ef]) > -1) {
-                                           // replace presentation form
-                                           // console.log('keeping normal form of the letter');
-                                           if (typeof localVersion['normal'] === 'object') {
-                                               returnable += localVersion['normal'][0];
-                                           }
-                                           else {
-                                               returnable += localVersion['normal'];
-                                           }
-                                           return;
-                                       }
-                                       // console.log('keeping this letter');
-                                       returnable += letter;
-                                       return;
-                                   }
-                                   else if (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1) {
-                                       // match
-                                       returnable += form[0];
-                                       // console.log('added the first letter from the same array');
-                                       return;
-                                   }
-                               }
-                           }
-                       }
-                       else if (localVersion === letter) {
-                           // match exact
-                           if (breakPresentationForm && letterForms['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(versions[v]) > -1) {
-                               // replace presentation form
-                               // console.log('keeping normal form of the letter');
-                               if (typeof letterForms['normal'] === 'object') {
-                                   returnable += letterForms['normal'][0];
-                               }
-                               else {
-                                   returnable += letterForms['normal'];
-                               }
-                               return;
-                           }
-                           // console.log('keeping this letter');
-                           returnable += letter;
-                           return;
-                       }
-                       else if (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
-                           // match
-                           returnable += localVersion[0];
-                           // console.log('added the first letter from the same array');
-                           return;
-                       }
-                   }
-               }
-               // try ligatures
-               for (var v2 = 0; v2 < reference.ligatureList.length; v2++) {
-                   var normalForm = reference.ligatureList[v2];
-                   if (normalForm !== 'words') {
-                       var ligForms = Object.keys(unicodeLigatures.default[normalForm]);
-                       for (var f = 0; f < ligForms.length; f++) {
-                           if (unicodeLigatures.default[normalForm][ligForms[f]] === letter) {
-                               returnable += normalForm;
-                               return;
-                           }
-                       }
-                   }
-               }
-               // try words ligatures
-               for (var v3 = 0; v3 < reference.ligatureWordList.length; v3++) {
-                   var normalForm$1 = reference.ligatureWordList[v3];
-                   if (unicodeLigatures.default.words[normalForm$1] === letter) {
-                       returnable += normalForm$1;
-                       return;
-                   }
-               }
-               returnable += letter;
-               // console.log('kept the letter')
-           });
-           return returnable;
-       }
-       exports.Normal = Normal;
-       });
-
-       var CharShaper_1 = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
-
-
-
-       function CharShaper(letter, form) {
-           if (!isArabic_1.isArabic(letter)) {
-               // fail not Arabic
-               throw new Error('Not Arabic');
-           }
-           if (letter === "\u0621") {
-               // hamza alone
-               return "\u0621";
-           }
-           for (var w = 0; w < reference.letterList.length; w++) {
-               // ok so we are checking this potential lettertron
-               var letterForms = unicodeArabic.default[reference.letterList[w]];
-               var versions = Object.keys(letterForms);
-               for (var v = 0; v < versions.length; v++) {
-                   var localVersion = letterForms[versions[v]];
-                   if ((localVersion === letter) ||
-                       (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1)) {
-                       if (versions.indexOf(form) > -1) {
-                           return letterForms[form];
-                       }
-                   }
-                   else if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-                       // check embedded
-                       var embeddedVersions = Object.keys(localVersion);
-                       for (var ev = 0; ev < embeddedVersions.length; ev++) {
-                           if ((localVersion[embeddedVersions[ev]] === letter) ||
-                               (typeof localVersion[embeddedVersions[ev]] === 'object' && localVersion[embeddedVersions[ev]].indexOf && localVersion[embeddedVersions[ev]].indexOf(letter) > -1)) {
-                               if (embeddedVersions.indexOf(form) > -1) {
-                                   return localVersion[form];
-                               }
-                           }
-                       }
-                   }
-               }
-           }
-       }
-       exports.CharShaper = CharShaper;
-       });
-
-       var WordShaper_1 = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
-
-
-
-
-       function WordShaper(word) {
-           var state = 'initial';
-           var output = '';
-           for (var w = 0; w < word.length; w++) {
-               var nextLetter = ' ';
-               for (var nxw = w + 1; nxw < word.length; nxw++) {
-                   if (!isArabic_1.isArabic(word[nxw])) {
-                       break;
-                   }
-                   if (reference.tashkeel.indexOf(word[nxw]) === -1) {
-                       nextLetter = word[nxw];
-                       break;
-                   }
-               }
-               if (!isArabic_1.isArabic(word[w]) || isArabic_1.isMath(word[w])) {
-                   // space or other non-Arabic
-                   output += word[w];
-                   state = 'initial';
-               }
-               else if (reference.tashkeel.indexOf(word[w]) > -1) {
-                   // tashkeel - add without changing state
-                   output += word[w];
-               }
-               else if ((nextLetter === ' ') // last Arabic letter in this word
-                   || (reference.lineBreakers.indexOf(word[w]) > -1)) { // the current letter is known to break lines
-                   output += CharShaper_1.CharShaper(word[w], state === 'initial' ? 'isolated' : 'final');
-                   state = 'initial';
-               }
-               else if (reference.lams.indexOf(word[w]) > -1 && reference.alefs.indexOf(nextLetter) > -1) {
-                   // LA letters - advance an additional letter after this
-                   output += unicodeLigatures.default[word[w] + nextLetter][(state === 'initial' ? 'isolated' : 'final')];
-                   while (word[w] !== nextLetter) {
-                       w++;
-                   }
-                   state = 'initial';
-               }
-               else {
-                   output += CharShaper_1.CharShaper(word[w], state);
-                   state = 'medial';
-               }
-           }
-           return output;
-       }
-       exports.WordShaper = WordShaper;
-       });
-
-       var ParentLetter_1 = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
-
-
-
-       function ParentLetter(letter) {
-           if (!isArabic_1.isArabic(letter)) {
-               throw new Error('Not an Arabic letter');
-           }
-           for (var w = 0; w < reference.letterList.length; w++) {
-               // ok so we are checking this potential lettertron
-               var letterForms = unicodeArabic.default[reference.letterList[w]];
-               var versions = Object.keys(letterForms);
-               for (var v = 0; v < versions.length; v++) {
-                   var localVersion = letterForms[versions[v]];
-                   if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-                       // look at this embedded object
-                       var embeddedForms = Object.keys(localVersion);
-                       for (var ef = 0; ef < embeddedForms.length; ef++) {
-                           var form = localVersion[embeddedForms[ef]];
-                           if (form === letter || (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1)) {
-                               // match
-                               return localVersion;
-                           }
-                       }
-                   }
-                   else if (localVersion === letter || (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1)) {
-                       // match
-                       return letterForms;
-                   }
-               }
-               return null;
-           }
-       }
-       exports.ParentLetter = ParentLetter;
-       function GrandparentLetter(letter) {
-           if (!isArabic_1.isArabic(letter)) {
-               throw new Error('Not an Arabic letter');
-           }
-           for (var w = 0; w < reference.letterList.length; w++) {
-               // ok so we are checking this potential lettertron
-               var letterForms = unicodeArabic.default[reference.letterList[w]];
-               var versions = Object.keys(letterForms);
-               for (var v = 0; v < versions.length; v++) {
-                   var localVersion = letterForms[versions[v]];
-                   if (typeof localVersion === 'object' && typeof localVersion.indexOf === 'undefined') {
-                       // look at this embedded object
-                       var embeddedForms = Object.keys(localVersion);
-                       for (var ef = 0; ef < embeddedForms.length; ef++) {
-                           var form = localVersion[embeddedForms[ef]];
-                           if (form === letter || (typeof form === 'object' && form.indexOf && form.indexOf(letter) > -1)) {
-                               // match
-                               return letterForms;
-                           }
-                       }
-                   }
-                   else if (localVersion === letter || (typeof localVersion === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1)) {
-                       // match
-                       return letterForms;
-                   }
-               }
-               return null;
-           }
-       }
-       exports.GrandparentLetter = GrandparentLetter;
-       });
-
-       var lib$1 = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
-
-       exports.isArabic = isArabic_1.isArabic;
-
-       exports.GlyphSplitter = GlyphSplitter_1.GlyphSplitter;
-
-       exports.BaselineSplitter = BaselineSplitter_1.BaselineSplitter;
-
-       exports.Normal = Normalization.Normal;
-
-       exports.CharShaper = CharShaper_1.CharShaper;
-
-       exports.WordShaper = WordShaper_1.WordShaper;
-
-       exports.ParentLetter = ParentLetter_1.ParentLetter;
-       exports.GrandparentLetter = ParentLetter_1.GrandparentLetter;
-       });
-
-       // see https://github.com/openstreetmap/iD/pull/3707
-
-       var rtlRegex = /[\u0590-\u05FF\u0600-\u06FF\u0750-\u07BF\u08A0–\u08BF]/;
-
-       function fixRTLTextForSvg(inputText) {
-           var ret = '', rtlBuffer = [];
-           var arabicRegex = /[\u0600-\u06FF]/g;
-           var arabicDiacritics = /[\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06ED]/g;
-           var arabicMath = /[\u0660-\u066C\u06F0-\u06F9]+/g;
-           var thaanaVowel = /[\u07A6-\u07B0]/;
-           var hebrewSign = /[\u0591-\u05bd\u05bf\u05c1-\u05c5\u05c7]/;
-
-           // Arabic word shaping
-           if (arabicRegex.test(inputText)) {
-               inputText = lib$1.WordShaper(inputText);
-           }
-
-           for (var n = 0; n < inputText.length; n++) {
-               var c = inputText[n];
-               if (arabicMath.test(c)) {
-                   // Arabic numbers go LTR
-                   ret += rtlBuffer.reverse().join('');
-                   rtlBuffer = [c];
-               } else {
-                   if (rtlBuffer.length && arabicMath.test(rtlBuffer[rtlBuffer.length - 1])) {
-                       ret += rtlBuffer.reverse().join('');
-                       rtlBuffer = [];
-                   }
-                   if ((thaanaVowel.test(c) || hebrewSign.test(c) || arabicDiacritics.test(c)) && rtlBuffer.length) {
-                       rtlBuffer[rtlBuffer.length - 1] += c;
-                   } else if (rtlRegex.test(c)
-                       // include Arabic presentation forms
-                       || (c.charCodeAt(0) >= 64336 && c.charCodeAt(0) <= 65023)
-                       || (c.charCodeAt(0) >= 65136 && c.charCodeAt(0) <= 65279)) {
-                       rtlBuffer.push(c);
-                   } else if (c === ' ' && rtlBuffer.length) {
-                       // whitespace within RTL text
-                       rtlBuffer = [rtlBuffer.reverse().join('') + ' '];
-                   } else {
-                       // non-RTL character
-                       ret += rtlBuffer.reverse().join('') + c;
-                       rtlBuffer = [];
-                   }
-               }
-           }
-           ret += rtlBuffer.reverse().join('');
-           return ret;
-       }
-
-       // https://github.com/openstreetmap/iD/issues/772
-       // http://mathiasbynens.be/notes/localstorage-pattern#comment-9
-       var _storage;
-       try { _storage = localStorage; } catch (e) {}  // eslint-disable-line no-empty
-       _storage = _storage || (function () {
-         var s = {};
-         return {
-           getItem: function (k) { return s[k]; },
-           setItem: function (k, v) { return s[k] = v; },
-           removeItem: function (k) { return delete s[k]; }
-         };
-       })();
-
-       //
-       // corePreferences is an interface for persisting basic key-value strings
-       // within and between iD sessions on the same site.
-       //
-       function corePreferences(k, v) {
-
-         try {
-           if (arguments.length === 1) { return _storage.getItem(k); }
-           else if (v === null) { _storage.removeItem(k); }
-           else { _storage.setItem(k, v); }
-         } catch (e) {
-           /* eslint-disable no-console */
-           if (typeof console !== 'undefined') {
-             console.error('localStorage quota exceeded');
-           }
-           /* eslint-enable no-console */
-         }
-
-       }
-
-       function responseText(response) {
-         if (!response.ok) { throw new Error(response.status + " " + response.statusText); }
-         return response.text();
-       }
-
-       function d3_text(input, init) {
-         return fetch(input, init).then(responseText);
-       }
-
-       function responseJson(response) {
-         if (!response.ok) { throw new Error(response.status + " " + response.statusText); }
-         if (response.status === 204 || response.status === 205) { return; }
-         return response.json();
-       }
-
-       function d3_json(input, init) {
-         return fetch(input, init).then(responseJson);
-       }
-
-       function parser(type) {
-         return function(input, init)  {
-           return d3_text(input, init).then(function(text) {
-             return (new DOMParser).parseFromString(text, type);
-           });
-         };
-       }
-
-       var d3_xml = parser("application/xml");
-
-       var svg = parser("image/svg+xml");
-
-       var _mainFileFetcher = coreFileFetcher(); // singleton
-
-       //
-       // coreFileFetcher asynchronously fetches data from JSON files
-       //
-       function coreFileFetcher() {
-         var _this = {};
-         var _inflight = {};
-         var _fileMap = {
-           'address_formats': 'data/address_formats.min.json',
-           'deprecated': 'data/deprecated.min.json',
-           'discarded': 'data/discarded.min.json',
-           'imagery': 'data/imagery.min.json',
-           'intro_graph': 'data/intro_graph.min.json',
-           'keepRight': 'data/keepRight.min.json',
-           'languages': 'data/languages.min.json',
-           'locales': 'data/locales.min.json',
-           'nsi_brands': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@4/dist/brands.min.json',
-           'nsi_filters': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@4/dist/filters.min.json',
-           'oci_features': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/features.min.json',
-           'oci_resources': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/resources.min.json',
-           'preset_categories': 'data/preset_categories.min.json',
-           'preset_defaults': 'data/preset_defaults.min.json',
-           'preset_fields': 'data/preset_fields.min.json',
-           'preset_presets': 'data/preset_presets.min.json',
-           'phone_formats': 'data/phone_formats.min.json',
-           'qa_data': 'data/qa_data.min.json',
-           'shortcuts': 'data/shortcuts.min.json',
-           'territory_languages': 'data/territory_languages.min.json',
-           'wmf_sitematrix': 'https://cdn.jsdelivr.net/npm/wmf-sitematrix@0.1/wikipedia.min.json'
-         };
-
-         var _cachedData = {};
-         // expose the cache; useful for tests
-         _this.cache = function () { return _cachedData; };
-
-
-         // Returns a Promise to fetch data
-         // (resolved with the data if we have it already)
-         _this.get = function (which) {
-           if (_cachedData[which]) {
-             return Promise.resolve(_cachedData[which]);
-           }
-
-           var file = _fileMap[which];
-           var url = file && _this.asset(file);
-           if (!url) {
-             return Promise.reject(("Unknown data file for \"" + which + "\""));
-           }
-
-           var prom = _inflight[url];
-           if (!prom) {
-             _inflight[url] = prom = d3_json(url)
-               .then(function (result) {
-                 delete _inflight[url];
-                 if (!result) {
-                   throw new Error(("No data loaded for \"" + which + "\""));
-                 }
-                 _cachedData[which] = result;
-                 return result;
-               })
-               .catch(function (err) {
-                 delete _inflight[url];
-                 throw err;
-               });
-           }
-
-           return prom;
-         };
-
-
-         // Accessor for the file map
-         _this.fileMap = function(val) {
-           if (!arguments.length) { return _fileMap; }
-           _fileMap = val;
-           return _this;
-         };
-
-         var _assetPath = '';
-         _this.assetPath = function(val) {
-           if (!arguments.length) { return _assetPath; }
-           _assetPath = val;
-           return _this;
-         };
-
-         var _assetMap = {};
-         _this.assetMap = function(val) {
-           if (!arguments.length) { return _assetMap; }
-           _assetMap = val;
-           return _this;
-         };
-
-         _this.asset = function (val) {
-           if (/^http(s)?:\/\//i.test(val)) { return val; }
-           var filename = _assetPath + val;
-           return _assetMap[filename] || filename;
-         };
-
-         return _this;
-       }
-
-       var _detected;
-
-       function utilDetect(refresh) {
-         if (_detected && !refresh) { return _detected; }
-         _detected = {};
-
-         var ua = navigator.userAgent;
-         var m = null;
-
-         /* Browser */
-         m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i);   // Edge
-         if (m !== null) {
-           _detected.browser = m[1];
-           _detected.version = m[2];
-         }
-         if (!_detected.browser) {
-           m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i);   // IE11
-           if (m !== null) {
-             _detected.browser = 'msie';
-             _detected.version = m[1];
-           }
-         }
-         if (!_detected.browser) {
-           m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i);   // Opera 15+
-           if (m !== null) {
-             _detected.browser = 'Opera';
-             _detected.version = m[2];
-           }
-         }
-         if (!_detected.browser) {
-           m = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
-           if (m !== null) {
-             _detected.browser = m[1];
-             _detected.version = m[2];
-             m = ua.match(/version\/([\.\d]+)/i);
-             if (m !== null) { _detected.version = m[1]; }
-           }
-         }
-         if (!_detected.browser) {
-           _detected.browser = navigator.appName;
-           _detected.version = navigator.appVersion;
-         }
-
-         // keep major.minor version only..
-         _detected.version = _detected.version.split(/\W/).slice(0,2).join('.');
-
-         // detect other browser capabilities
-         // Legacy Opera has incomplete svg style support. See #715
-         _detected.opera = (_detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15 );
-
-         if (_detected.browser.toLowerCase() === 'msie') {
-           _detected.ie = true;
-           _detected.browser = 'Internet Explorer';
-           _detected.support = parseFloat(_detected.version) >= 11;
-         } else {
-           _detected.ie = false;
-           _detected.support = true;
-         }
-
-         _detected.filedrop = (window.FileReader && 'ondrop' in window);
-         _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
-         _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
-
-
-         /* Platform */
-         if (/Win/.test(ua)) {
-           _detected.os = 'win';
-           _detected.platform = 'Windows';
-         } else if (/Mac/.test(ua)) {
-           _detected.os = 'mac';
-           _detected.platform = 'Macintosh';
-         } else if (/X11/.test(ua) || /Linux/.test(ua)) {
-           _detected.os = 'linux';
-           _detected.platform = 'Linux';
-         } else {
-           _detected.os = 'win';
-           _detected.platform = 'Unknown';
-         }
-
-         _detected.isMobileWebKit = (/\b(iPad|iPhone|iPod)\b/.test(ua) ||
-           // HACK: iPadOS 13+ requests desktop sites by default by using a Mac user agent,
-           // so assume any "mac" with multitouch is actually iOS
-           (navigator.platform === 'MacIntel' && 'maxTouchPoints' in navigator && navigator.maxTouchPoints > 1)) &&
-           /WebKit/.test(ua) &&
-           !/Edge/.test(ua) &&
-           !window.MSStream;
-
-
-         /* Locale */
-         // An array of locales requested by the browser in priority order.
-         _detected.browserLocales = Array.from(new Set( // remove duplicates
-             [navigator.language]
-               .concat(navigator.languages || [])
-               .concat([
-                   // old property for backwards compatibility
-                   navigator.userLanguage,
-                   // fallback to English
-                   'en'
-               ])
-               // remove any undefined values
-               .filter(Boolean)
-           ));
-
-
-         /* Host */
-         var loc = window.top.location;
-         var origin = loc.origin;
-         if (!origin) {  // for unpatched IE11
-           origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port: '');
-         }
-
-         _detected.host = origin + loc.pathname;
-
-
-         return _detected;
-       }
-
-       var aesJs = createCommonjsModule(function (module, exports) {
-       /*! MIT License. Copyright 2015-2018 Richard Moore <me@ricmoo.com>. See LICENSE.txt. */
-       (function(root) {
-
-           function checkInt(value) {
-               return (parseInt(value) === value);
-           }
-
-           function checkInts(arrayish) {
-               if (!checkInt(arrayish.length)) { return false; }
-
-               for (var i = 0; i < arrayish.length; i++) {
-                   if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
-                       return false;
-                   }
-               }
-
-               return true;
-           }
-
-           function coerceArray(arg, copy) {
-
-               // ArrayBuffer view
-               if (arg.buffer && arg.name === 'Uint8Array') {
-
-                   if (copy) {
-                       if (arg.slice) {
-                           arg = arg.slice();
-                       } else {
-                           arg = Array.prototype.slice.call(arg);
-                       }
-                   }
-
-                   return arg;
-               }
-
-               // It's an array; check it is a valid representation of a byte
-               if (Array.isArray(arg)) {
-                   if (!checkInts(arg)) {
-                       throw new Error('Array contains invalid value: ' + arg);
-                   }
-
-                   return new Uint8Array(arg);
-               }
-
-               // Something else, but behaves like an array (maybe a Buffer? Arguments?)
-               if (checkInt(arg.length) && checkInts(arg)) {
-                   return new Uint8Array(arg);
-               }
-
-               throw new Error('unsupported array-like object');
-           }
-
-           function createArray(length) {
-               return new Uint8Array(length);
-           }
-
-           function copyArray(sourceArray, targetArray, targetStart, sourceStart, sourceEnd) {
-               if (sourceStart != null || sourceEnd != null) {
-                   if (sourceArray.slice) {
-                       sourceArray = sourceArray.slice(sourceStart, sourceEnd);
-                   } else {
-                       sourceArray = Array.prototype.slice.call(sourceArray, sourceStart, sourceEnd);
-                   }
-               }
-               targetArray.set(sourceArray, targetStart);
-           }
-
-
-
-           var convertUtf8 = (function() {
-               function toBytes(text) {
-                   var result = [], i = 0;
-                   text = encodeURI(text);
-                   while (i < text.length) {
-                       var c = text.charCodeAt(i++);
-
-                       // if it is a % sign, encode the following 2 bytes as a hex value
-                       if (c === 37) {
-                           result.push(parseInt(text.substr(i, 2), 16));
-                           i += 2;
-
-                       // otherwise, just the actual byte
-                       } else {
-                           result.push(c);
-                       }
-                   }
-
-                   return coerceArray(result);
-               }
-
-               function fromBytes(bytes) {
-                   var result = [], i = 0;
-
-                   while (i < bytes.length) {
-                       var c = bytes[i];
-
-                       if (c < 128) {
-                           result.push(String.fromCharCode(c));
-                           i++;
-                       } else if (c > 191 && c < 224) {
-                           result.push(String.fromCharCode(((c & 0x1f) << 6) | (bytes[i + 1] & 0x3f)));
-                           i += 2;
-                       } else {
-                           result.push(String.fromCharCode(((c & 0x0f) << 12) | ((bytes[i + 1] & 0x3f) << 6) | (bytes[i + 2] & 0x3f)));
-                           i += 3;
-                       }
-                   }
-
-                   return result.join('');
-               }
-
-               return {
-                   toBytes: toBytes,
-                   fromBytes: fromBytes,
-               }
-           })();
-
-           var convertHex = (function() {
-               function toBytes(text) {
-                   var result = [];
-                   for (var i = 0; i < text.length; i += 2) {
-                       result.push(parseInt(text.substr(i, 2), 16));
-                   }
-
-                   return result;
-               }
-
-               // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html
-               var Hex = '0123456789abcdef';
-
-               function fromBytes(bytes) {
-                       var result = [];
-                       for (var i = 0; i < bytes.length; i++) {
-                           var v = bytes[i];
-                           result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
-                       }
-                       return result.join('');
-               }
-
-               return {
-                   toBytes: toBytes,
-                   fromBytes: fromBytes,
-               }
-           })();
-
-
-           // Number of rounds by keysize
-           var numberOfRounds = {16: 10, 24: 12, 32: 14};
-
-           // Round constant words
-           var rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91];
-
-           // S-box and Inverse S-box (S is for Substitution)
-           var S = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16];
-           var Si =[0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d];
-
-           // Transformations for encryption
-           var T1 = [0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4, 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12, 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a];
-           var T2 = [0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0, 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, 0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a, 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5, 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2, 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c, 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e, 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616];
-           var T3 = [0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, 0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a, 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c, 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008, 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e, 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, 0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16];
-           var T4 = [0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, 0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f, 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8, 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810, 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c, 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c];
-
-           // Transformations for decryption
-           var T5 = [0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742];
-           var T6 = [0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857];
-           var T7 = [0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8];
-           var T8 = [0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0];
-
-           // Transformations for decryption key expansion
-           var U1 = [0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3];
-           var U2 = [0x00000000, 0x0b0e090d, 0x161c121a, 0x1d121b17, 0x2c382434, 0x27362d39, 0x3a24362e, 0x312a3f23, 0x58704868, 0x537e4165, 0x4e6c5a72, 0x4562537f, 0x74486c5c, 0x7f466551, 0x62547e46, 0x695a774b, 0xb0e090d0, 0xbbee99dd, 0xa6fc82ca, 0xadf28bc7, 0x9cd8b4e4, 0x97d6bde9, 0x8ac4a6fe, 0x81caaff3, 0xe890d8b8, 0xe39ed1b5, 0xfe8ccaa2, 0xf582c3af, 0xc4a8fc8c, 0xcfa6f581, 0xd2b4ee96, 0xd9bae79b, 0x7bdb3bbb, 0x70d532b6, 0x6dc729a1, 0x66c920ac, 0x57e31f8f, 0x5ced1682, 0x41ff0d95, 0x4af10498, 0x23ab73d3, 0x28a57ade, 0x35b761c9, 0x3eb968c4, 0x0f9357e7, 0x049d5eea, 0x198f45fd, 0x12814cf0, 0xcb3bab6b, 0xc035a266, 0xdd27b971, 0xd629b07c, 0xe7038f5f, 0xec0d8652, 0xf11f9d45, 0xfa119448, 0x934be303, 0x9845ea0e, 0x8557f119, 0x8e59f814, 0xbf73c737, 0xb47dce3a, 0xa96fd52d, 0xa261dc20, 0xf6ad766d, 0xfda37f60, 0xe0b16477, 0xebbf6d7a, 0xda955259, 0xd19b5b54, 0xcc894043, 0xc787494e, 0xaedd3e05, 0xa5d33708, 0xb8c12c1f, 0xb3cf2512, 0x82e51a31, 0x89eb133c, 0x94f9082b, 0x9ff70126, 0x464de6bd, 0x4d43efb0, 0x5051f4a7, 0x5b5ffdaa, 0x6a75c289, 0x617bcb84, 0x7c69d093, 0x7767d99e, 0x1e3daed5, 0x1533a7d8, 0x0821bccf, 0x032fb5c2, 0x32058ae1, 0x390b83ec, 0x241998fb, 0x2f1791f6, 0x8d764dd6, 0x867844db, 0x9b6a5fcc, 0x906456c1, 0xa14e69e2, 0xaa4060ef, 0xb7527bf8, 0xbc5c72f5, 0xd50605be, 0xde080cb3, 0xc31a17a4, 0xc8141ea9, 0xf93e218a, 0xf2302887, 0xef223390, 0xe42c3a9d, 0x3d96dd06, 0x3698d40b, 0x2b8acf1c, 0x2084c611, 0x11aef932, 0x1aa0f03f, 0x07b2eb28, 0x0cbce225, 0x65e6956e, 0x6ee89c63, 0x73fa8774, 0x78f48e79, 0x49deb15a, 0x42d0b857, 0x5fc2a340, 0x54ccaa4d, 0xf741ecda, 0xfc4fe5d7, 0xe15dfec0, 0xea53f7cd, 0xdb79c8ee, 0xd077c1e3, 0xcd65daf4, 0xc66bd3f9, 0xaf31a4b2, 0xa43fadbf, 0xb92db6a8, 0xb223bfa5, 0x83098086, 0x8807898b, 0x9515929c, 0x9e1b9b91, 0x47a17c0a, 0x4caf7507, 0x51bd6e10, 0x5ab3671d, 0x6b99583e, 0x60975133, 0x7d854a24, 0x768b4329, 0x1fd13462, 0x14df3d6f, 0x09cd2678, 0x02c32f75, 0x33e91056, 0x38e7195b, 0x25f5024c, 0x2efb0b41, 0x8c9ad761, 0x8794de6c, 0x9a86c57b, 0x9188cc76, 0xa0a2f355, 0xabacfa58, 0xb6bee14f, 0xbdb0e842, 0xd4ea9f09, 0xdfe49604, 0xc2f68d13, 0xc9f8841e, 0xf8d2bb3d, 0xf3dcb230, 0xeecea927, 0xe5c0a02a, 0x3c7a47b1, 0x37744ebc, 0x2a6655ab, 0x21685ca6, 0x10426385, 0x1b4c6a88, 0x065e719f, 0x0d507892, 0x640a0fd9, 0x6f0406d4, 0x72161dc3, 0x791814ce, 0x48322bed, 0x433c22e0, 0x5e2e39f7, 0x552030fa, 0x01ec9ab7, 0x0ae293ba, 0x17f088ad, 0x1cfe81a0, 0x2dd4be83, 0x26dab78e, 0x3bc8ac99, 0x30c6a594, 0x599cd2df, 0x5292dbd2, 0x4f80c0c5, 0x448ec9c8, 0x75a4f6eb, 0x7eaaffe6, 0x63b8e4f1, 0x68b6edfc, 0xb10c0a67, 0xba02036a, 0xa710187d, 0xac1e1170, 0x9d342e53, 0x963a275e, 0x8b283c49, 0x80263544, 0xe97c420f, 0xe2724b02, 0xff605015, 0xf46e5918, 0xc544663b, 0xce4a6f36, 0xd3587421, 0xd8567d2c, 0x7a37a10c, 0x7139a801, 0x6c2bb316, 0x6725ba1b, 0x560f8538, 0x5d018c35, 0x40139722, 0x4b1d9e2f, 0x2247e964, 0x2949e069, 0x345bfb7e, 0x3f55f273, 0x0e7fcd50, 0x0571c45d, 0x1863df4a, 0x136dd647, 0xcad731dc, 0xc1d938d1, 0xdccb23c6, 0xd7c52acb, 0xe6ef15e8, 0xede11ce5, 0xf0f307f2, 0xfbfd0eff, 0x92a779b4, 0x99a970b9, 0x84bb6bae, 0x8fb562a3, 0xbe9f5d80, 0xb591548d, 0xa8834f9a, 0xa38d4697];
-           var U3 = [0x00000000, 0x0d0b0e09, 0x1a161c12, 0x171d121b, 0x342c3824, 0x3927362d, 0x2e3a2436, 0x23312a3f, 0x68587048, 0x65537e41, 0x724e6c5a, 0x7f456253, 0x5c74486c, 0x517f4665, 0x4662547e, 0x4b695a77, 0xd0b0e090, 0xddbbee99, 0xcaa6fc82, 0xc7adf28b, 0xe49cd8b4, 0xe997d6bd, 0xfe8ac4a6, 0xf381caaf, 0xb8e890d8, 0xb5e39ed1, 0xa2fe8cca, 0xaff582c3, 0x8cc4a8fc, 0x81cfa6f5, 0x96d2b4ee, 0x9bd9bae7, 0xbb7bdb3b, 0xb670d532, 0xa16dc729, 0xac66c920, 0x8f57e31f, 0x825ced16, 0x9541ff0d, 0x984af104, 0xd323ab73, 0xde28a57a, 0xc935b761, 0xc43eb968, 0xe70f9357, 0xea049d5e, 0xfd198f45, 0xf012814c, 0x6bcb3bab, 0x66c035a2, 0x71dd27b9, 0x7cd629b0, 0x5fe7038f, 0x52ec0d86, 0x45f11f9d, 0x48fa1194, 0x03934be3, 0x0e9845ea, 0x198557f1, 0x148e59f8, 0x37bf73c7, 0x3ab47dce, 0x2da96fd5, 0x20a261dc, 0x6df6ad76, 0x60fda37f, 0x77e0b164, 0x7aebbf6d, 0x59da9552, 0x54d19b5b, 0x43cc8940, 0x4ec78749, 0x05aedd3e, 0x08a5d337, 0x1fb8c12c, 0x12b3cf25, 0x3182e51a, 0x3c89eb13, 0x2b94f908, 0x269ff701, 0xbd464de6, 0xb04d43ef, 0xa75051f4, 0xaa5b5ffd, 0x896a75c2, 0x84617bcb, 0x937c69d0, 0x9e7767d9, 0xd51e3dae, 0xd81533a7, 0xcf0821bc, 0xc2032fb5, 0xe132058a, 0xec390b83, 0xfb241998, 0xf62f1791, 0xd68d764d, 0xdb867844, 0xcc9b6a5f, 0xc1906456, 0xe2a14e69, 0xefaa4060, 0xf8b7527b, 0xf5bc5c72, 0xbed50605, 0xb3de080c, 0xa4c31a17, 0xa9c8141e, 0x8af93e21, 0x87f23028, 0x90ef2233, 0x9de42c3a, 0x063d96dd, 0x0b3698d4, 0x1c2b8acf, 0x112084c6, 0x3211aef9, 0x3f1aa0f0, 0x2807b2eb, 0x250cbce2, 0x6e65e695, 0x636ee89c, 0x7473fa87, 0x7978f48e, 0x5a49deb1, 0x5742d0b8, 0x405fc2a3, 0x4d54ccaa, 0xdaf741ec, 0xd7fc4fe5, 0xc0e15dfe, 0xcdea53f7, 0xeedb79c8, 0xe3d077c1, 0xf4cd65da, 0xf9c66bd3, 0xb2af31a4, 0xbfa43fad, 0xa8b92db6, 0xa5b223bf, 0x86830980, 0x8b880789, 0x9c951592, 0x919e1b9b, 0x0a47a17c, 0x074caf75, 0x1051bd6e, 0x1d5ab367, 0x3e6b9958, 0x33609751, 0x247d854a, 0x29768b43, 0x621fd134, 0x6f14df3d, 0x7809cd26, 0x7502c32f, 0x5633e910, 0x5b38e719, 0x4c25f502, 0x412efb0b, 0x618c9ad7, 0x6c8794de, 0x7b9a86c5, 0x769188cc, 0x55a0a2f3, 0x58abacfa, 0x4fb6bee1, 0x42bdb0e8, 0x09d4ea9f, 0x04dfe496, 0x13c2f68d, 0x1ec9f884, 0x3df8d2bb, 0x30f3dcb2, 0x27eecea9, 0x2ae5c0a0, 0xb13c7a47, 0xbc37744e, 0xab2a6655, 0xa621685c, 0x85104263, 0x881b4c6a, 0x9f065e71, 0x920d5078, 0xd9640a0f, 0xd46f0406, 0xc372161d, 0xce791814, 0xed48322b, 0xe0433c22, 0xf75e2e39, 0xfa552030, 0xb701ec9a, 0xba0ae293, 0xad17f088, 0xa01cfe81, 0x832dd4be, 0x8e26dab7, 0x993bc8ac, 0x9430c6a5, 0xdf599cd2, 0xd25292db, 0xc54f80c0, 0xc8448ec9, 0xeb75a4f6, 0xe67eaaff, 0xf163b8e4, 0xfc68b6ed, 0x67b10c0a, 0x6aba0203, 0x7da71018, 0x70ac1e11, 0x539d342e, 0x5e963a27, 0x498b283c, 0x44802635, 0x0fe97c42, 0x02e2724b, 0x15ff6050, 0x18f46e59, 0x3bc54466, 0x36ce4a6f, 0x21d35874, 0x2cd8567d, 0x0c7a37a1, 0x017139a8, 0x166c2bb3, 0x1b6725ba, 0x38560f85, 0x355d018c, 0x22401397, 0x2f4b1d9e, 0x642247e9, 0x692949e0, 0x7e345bfb, 0x733f55f2, 0x500e7fcd, 0x5d0571c4, 0x4a1863df, 0x47136dd6, 0xdccad731, 0xd1c1d938, 0xc6dccb23, 0xcbd7c52a, 0xe8e6ef15, 0xe5ede11c, 0xf2f0f307, 0xfffbfd0e, 0xb492a779, 0xb999a970, 0xae84bb6b, 0xa38fb562, 0x80be9f5d, 0x8db59154, 0x9aa8834f, 0x97a38d46];
-           var U4 = [0x00000000, 0x090d0b0e, 0x121a161c, 0x1b171d12, 0x24342c38, 0x2d392736, 0x362e3a24, 0x3f23312a, 0x48685870, 0x4165537e, 0x5a724e6c, 0x537f4562, 0x6c5c7448, 0x65517f46, 0x7e466254, 0x774b695a, 0x90d0b0e0, 0x99ddbbee, 0x82caa6fc, 0x8bc7adf2, 0xb4e49cd8, 0xbde997d6, 0xa6fe8ac4, 0xaff381ca, 0xd8b8e890, 0xd1b5e39e, 0xcaa2fe8c, 0xc3aff582, 0xfc8cc4a8, 0xf581cfa6, 0xee96d2b4, 0xe79bd9ba, 0x3bbb7bdb, 0x32b670d5, 0x29a16dc7, 0x20ac66c9, 0x1f8f57e3, 0x16825ced, 0x0d9541ff, 0x04984af1, 0x73d323ab, 0x7ade28a5, 0x61c935b7, 0x68c43eb9, 0x57e70f93, 0x5eea049d, 0x45fd198f, 0x4cf01281, 0xab6bcb3b, 0xa266c035, 0xb971dd27, 0xb07cd629, 0x8f5fe703, 0x8652ec0d, 0x9d45f11f, 0x9448fa11, 0xe303934b, 0xea0e9845, 0xf1198557, 0xf8148e59, 0xc737bf73, 0xce3ab47d, 0xd52da96f, 0xdc20a261, 0x766df6ad, 0x7f60fda3, 0x6477e0b1, 0x6d7aebbf, 0x5259da95, 0x5b54d19b, 0x4043cc89, 0x494ec787, 0x3e05aedd, 0x3708a5d3, 0x2c1fb8c1, 0x2512b3cf, 0x1a3182e5, 0x133c89eb, 0x082b94f9, 0x01269ff7, 0xe6bd464d, 0xefb04d43, 0xf4a75051, 0xfdaa5b5f, 0xc2896a75, 0xcb84617b, 0xd0937c69, 0xd99e7767, 0xaed51e3d, 0xa7d81533, 0xbccf0821, 0xb5c2032f, 0x8ae13205, 0x83ec390b, 0x98fb2419, 0x91f62f17, 0x4dd68d76, 0x44db8678, 0x5fcc9b6a, 0x56c19064, 0x69e2a14e, 0x60efaa40, 0x7bf8b752, 0x72f5bc5c, 0x05bed506, 0x0cb3de08, 0x17a4c31a, 0x1ea9c814, 0x218af93e, 0x2887f230, 0x3390ef22, 0x3a9de42c, 0xdd063d96, 0xd40b3698, 0xcf1c2b8a, 0xc6112084, 0xf93211ae, 0xf03f1aa0, 0xeb2807b2, 0xe2250cbc, 0x956e65e6, 0x9c636ee8, 0x877473fa, 0x8e7978f4, 0xb15a49de, 0xb85742d0, 0xa3405fc2, 0xaa4d54cc, 0xecdaf741, 0xe5d7fc4f, 0xfec0e15d, 0xf7cdea53, 0xc8eedb79, 0xc1e3d077, 0xdaf4cd65, 0xd3f9c66b, 0xa4b2af31, 0xadbfa43f, 0xb6a8b92d, 0xbfa5b223, 0x80868309, 0x898b8807, 0x929c9515, 0x9b919e1b, 0x7c0a47a1, 0x75074caf, 0x6e1051bd, 0x671d5ab3, 0x583e6b99, 0x51336097, 0x4a247d85, 0x4329768b, 0x34621fd1, 0x3d6f14df, 0x267809cd, 0x2f7502c3, 0x105633e9, 0x195b38e7, 0x024c25f5, 0x0b412efb, 0xd7618c9a, 0xde6c8794, 0xc57b9a86, 0xcc769188, 0xf355a0a2, 0xfa58abac, 0xe14fb6be, 0xe842bdb0, 0x9f09d4ea, 0x9604dfe4, 0x8d13c2f6, 0x841ec9f8, 0xbb3df8d2, 0xb230f3dc, 0xa927eece, 0xa02ae5c0, 0x47b13c7a, 0x4ebc3774, 0x55ab2a66, 0x5ca62168, 0x63851042, 0x6a881b4c, 0x719f065e, 0x78920d50, 0x0fd9640a, 0x06d46f04, 0x1dc37216, 0x14ce7918, 0x2bed4832, 0x22e0433c, 0x39f75e2e, 0x30fa5520, 0x9ab701ec, 0x93ba0ae2, 0x88ad17f0, 0x81a01cfe, 0xbe832dd4, 0xb78e26da, 0xac993bc8, 0xa59430c6, 0xd2df599c, 0xdbd25292, 0xc0c54f80, 0xc9c8448e, 0xf6eb75a4, 0xffe67eaa, 0xe4f163b8, 0xedfc68b6, 0x0a67b10c, 0x036aba02, 0x187da710, 0x1170ac1e, 0x2e539d34, 0x275e963a, 0x3c498b28, 0x35448026, 0x420fe97c, 0x4b02e272, 0x5015ff60, 0x5918f46e, 0x663bc544, 0x6f36ce4a, 0x7421d358, 0x7d2cd856, 0xa10c7a37, 0xa8017139, 0xb3166c2b, 0xba1b6725, 0x8538560f, 0x8c355d01, 0x97224013, 0x9e2f4b1d, 0xe9642247, 0xe0692949, 0xfb7e345b, 0xf2733f55, 0xcd500e7f, 0xc45d0571, 0xdf4a1863, 0xd647136d, 0x31dccad7, 0x38d1c1d9, 0x23c6dccb, 0x2acbd7c5, 0x15e8e6ef, 0x1ce5ede1, 0x07f2f0f3, 0x0efffbfd, 0x79b492a7, 0x70b999a9, 0x6bae84bb, 0x62a38fb5, 0x5d80be9f, 0x548db591, 0x4f9aa883, 0x4697a38d];
-
-           function convertToInt32(bytes) {
-               var result = [];
-               for (var i = 0; i < bytes.length; i += 4) {
-                   result.push(
-                       (bytes[i    ] << 24) |
-                       (bytes[i + 1] << 16) |
-                       (bytes[i + 2] <<  8) |
-                        bytes[i + 3]
-                   );
-               }
-               return result;
-           }
-
-           var AES = function(key) {
-               if (!(this instanceof AES)) {
-                   throw Error('AES must be instanitated with `new`');
-               }
-
-               Object.defineProperty(this, 'key', {
-                   value: coerceArray(key, true)
-               });
-
-               this._prepare();
-           };
-
-
-           AES.prototype._prepare = function() {
-
-               var rounds = numberOfRounds[this.key.length];
-               if (rounds == null) {
-                   throw new Error('invalid key size (must be 16, 24 or 32 bytes)');
-               }
-
-               // encryption round keys
-               this._Ke = [];
-
-               // decryption round keys
-               this._Kd = [];
-
-               for (var i = 0; i <= rounds; i++) {
-                   this._Ke.push([0, 0, 0, 0]);
-                   this._Kd.push([0, 0, 0, 0]);
-               }
-
-               var roundKeyCount = (rounds + 1) * 4;
-               var KC = this.key.length / 4;
-
-               // convert the key into ints
-               var tk = convertToInt32(this.key);
-
-               // copy values into round key arrays
-               var index;
-               for (var i = 0; i < KC; i++) {
-                   index = i >> 2;
-                   this._Ke[index][i % 4] = tk[i];
-                   this._Kd[rounds - index][i % 4] = tk[i];
-               }
-
-               // key expansion (fips-197 section 5.2)
-               var rconpointer = 0;
-               var t = KC, tt;
-               while (t < roundKeyCount) {
-                   tt = tk[KC - 1];
-                   tk[0] ^= ((S[(tt >> 16) & 0xFF] << 24) ^
-                             (S[(tt >>  8) & 0xFF] << 16) ^
-                             (S[ tt        & 0xFF] <<  8) ^
-                              S[(tt >> 24) & 0xFF]        ^
-                             (rcon[rconpointer] << 24));
-                   rconpointer += 1;
-
-                   // key expansion (for non-256 bit)
-                   if (KC != 8) {
-                       for (var i = 1; i < KC; i++) {
-                           tk[i] ^= tk[i - 1];
-                       }
-
-                   // key expansion for 256-bit keys is "slightly different" (fips-197)
-                   } else {
-                       for (var i = 1; i < (KC / 2); i++) {
-                           tk[i] ^= tk[i - 1];
-                       }
-                       tt = tk[(KC / 2) - 1];
-
-                       tk[KC / 2] ^= (S[ tt        & 0xFF]        ^
-                                     (S[(tt >>  8) & 0xFF] <<  8) ^
-                                     (S[(tt >> 16) & 0xFF] << 16) ^
-                                     (S[(tt >> 24) & 0xFF] << 24));
-
-                       for (var i = (KC / 2) + 1; i < KC; i++) {
-                           tk[i] ^= tk[i - 1];
-                       }
-                   }
-
-                   // copy values into round key arrays
-                   var i = 0, r, c;
-                   while (i < KC && t < roundKeyCount) {
-                       r = t >> 2;
-                       c = t % 4;
-                       this._Ke[r][c] = tk[i];
-                       this._Kd[rounds - r][c] = tk[i++];
-                       t++;
-                   }
-               }
-
-               // inverse-cipher-ify the decryption round key (fips-197 section 5.3)
-               for (var r = 1; r < rounds; r++) {
-                   for (var c = 0; c < 4; c++) {
-                       tt = this._Kd[r][c];
-                       this._Kd[r][c] = (U1[(tt >> 24) & 0xFF] ^
-                                         U2[(tt >> 16) & 0xFF] ^
-                                         U3[(tt >>  8) & 0xFF] ^
-                                         U4[ tt        & 0xFF]);
-                   }
-               }
-           };
-
-           AES.prototype.encrypt = function(plaintext) {
-               if (plaintext.length != 16) {
-                   throw new Error('invalid plaintext size (must be 16 bytes)');
-               }
-
-               var rounds = this._Ke.length - 1;
-               var a = [0, 0, 0, 0];
-
-               // convert plaintext to (ints ^ key)
-               var t = convertToInt32(plaintext);
-               for (var i = 0; i < 4; i++) {
-                   t[i] ^= this._Ke[0][i];
-               }
-
-               // apply round transforms
-               for (var r = 1; r < rounds; r++) {
-                   for (var i = 0; i < 4; i++) {
-                       a[i] = (T1[(t[ i         ] >> 24) & 0xff] ^
-                               T2[(t[(i + 1) % 4] >> 16) & 0xff] ^
-                               T3[(t[(i + 2) % 4] >>  8) & 0xff] ^
-                               T4[ t[(i + 3) % 4]        & 0xff] ^
-                               this._Ke[r][i]);
-                   }
-                   t = a.slice();
-               }
-
-               // the last round is special
-               var result = createArray(16), tt;
-               for (var i = 0; i < 4; i++) {
-                   tt = this._Ke[rounds][i];
-                   result[4 * i    ] = (S[(t[ i         ] >> 24) & 0xff] ^ (tt >> 24)) & 0xff;
-                   result[4 * i + 1] = (S[(t[(i + 1) % 4] >> 16) & 0xff] ^ (tt >> 16)) & 0xff;
-                   result[4 * i + 2] = (S[(t[(i + 2) % 4] >>  8) & 0xff] ^ (tt >>  8)) & 0xff;
-                   result[4 * i + 3] = (S[ t[(i + 3) % 4]        & 0xff] ^  tt       ) & 0xff;
-               }
-
-               return result;
-           };
-
-           AES.prototype.decrypt = function(ciphertext) {
-               if (ciphertext.length != 16) {
-                   throw new Error('invalid ciphertext size (must be 16 bytes)');
-               }
-
-               var rounds = this._Kd.length - 1;
-               var a = [0, 0, 0, 0];
-
-               // convert plaintext to (ints ^ key)
-               var t = convertToInt32(ciphertext);
-               for (var i = 0; i < 4; i++) {
-                   t[i] ^= this._Kd[0][i];
-               }
-
-               // apply round transforms
-               for (var r = 1; r < rounds; r++) {
-                   for (var i = 0; i < 4; i++) {
-                       a[i] = (T5[(t[ i          ] >> 24) & 0xff] ^
-                               T6[(t[(i + 3) % 4] >> 16) & 0xff] ^
-                               T7[(t[(i + 2) % 4] >>  8) & 0xff] ^
-                               T8[ t[(i + 1) % 4]        & 0xff] ^
-                               this._Kd[r][i]);
-                   }
-                   t = a.slice();
-               }
-
-               // the last round is special
-               var result = createArray(16), tt;
-               for (var i = 0; i < 4; i++) {
-                   tt = this._Kd[rounds][i];
-                   result[4 * i    ] = (Si[(t[ i         ] >> 24) & 0xff] ^ (tt >> 24)) & 0xff;
-                   result[4 * i + 1] = (Si[(t[(i + 3) % 4] >> 16) & 0xff] ^ (tt >> 16)) & 0xff;
-                   result[4 * i + 2] = (Si[(t[(i + 2) % 4] >>  8) & 0xff] ^ (tt >>  8)) & 0xff;
-                   result[4 * i + 3] = (Si[ t[(i + 1) % 4]        & 0xff] ^  tt       ) & 0xff;
-               }
-
-               return result;
-           };
-
-
-           /**
-            *  Mode Of Operation - Electonic Codebook (ECB)
-            */
-           var ModeOfOperationECB = function(key) {
-               if (!(this instanceof ModeOfOperationECB)) {
-                   throw Error('AES must be instanitated with `new`');
-               }
-
-               this.description = "Electronic Code Block";
-               this.name = "ecb";
-
-               this._aes = new AES(key);
-           };
-
-           ModeOfOperationECB.prototype.encrypt = function(plaintext) {
-               plaintext = coerceArray(plaintext);
-
-               if ((plaintext.length % 16) !== 0) {
-                   throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
-               }
-
-               var ciphertext = createArray(plaintext.length);
-               var block = createArray(16);
-
-               for (var i = 0; i < plaintext.length; i += 16) {
-                   copyArray(plaintext, block, 0, i, i + 16);
-                   block = this._aes.encrypt(block);
-                   copyArray(block, ciphertext, i);
-               }
-
-               return ciphertext;
-           };
-
-           ModeOfOperationECB.prototype.decrypt = function(ciphertext) {
-               ciphertext = coerceArray(ciphertext);
-
-               if ((ciphertext.length % 16) !== 0) {
-                   throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
-               }
-
-               var plaintext = createArray(ciphertext.length);
-               var block = createArray(16);
-
-               for (var i = 0; i < ciphertext.length; i += 16) {
-                   copyArray(ciphertext, block, 0, i, i + 16);
-                   block = this._aes.decrypt(block);
-                   copyArray(block, plaintext, i);
-               }
-
-               return plaintext;
-           };
-
-
-           /**
-            *  Mode Of Operation - Cipher Block Chaining (CBC)
-            */
-           var ModeOfOperationCBC = function(key, iv) {
-               if (!(this instanceof ModeOfOperationCBC)) {
-                   throw Error('AES must be instanitated with `new`');
-               }
-
-               this.description = "Cipher Block Chaining";
-               this.name = "cbc";
-
-               if (!iv) {
-                   iv = createArray(16);
-
-               } else if (iv.length != 16) {
-                   throw new Error('invalid initialation vector size (must be 16 bytes)');
-               }
-
-               this._lastCipherblock = coerceArray(iv, true);
-
-               this._aes = new AES(key);
-           };
-
-           ModeOfOperationCBC.prototype.encrypt = function(plaintext) {
-               plaintext = coerceArray(plaintext);
-
-               if ((plaintext.length % 16) !== 0) {
-                   throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
-               }
-
-               var ciphertext = createArray(plaintext.length);
-               var block = createArray(16);
-
-               for (var i = 0; i < plaintext.length; i += 16) {
-                   copyArray(plaintext, block, 0, i, i + 16);
-
-                   for (var j = 0; j < 16; j++) {
-                       block[j] ^= this._lastCipherblock[j];
-                   }
-
-                   this._lastCipherblock = this._aes.encrypt(block);
-                   copyArray(this._lastCipherblock, ciphertext, i);
-               }
-
-               return ciphertext;
-           };
-
-           ModeOfOperationCBC.prototype.decrypt = function(ciphertext) {
-               ciphertext = coerceArray(ciphertext);
-
-               if ((ciphertext.length % 16) !== 0) {
-                   throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
-               }
-
-               var plaintext = createArray(ciphertext.length);
-               var block = createArray(16);
-
-               for (var i = 0; i < ciphertext.length; i += 16) {
-                   copyArray(ciphertext, block, 0, i, i + 16);
-                   block = this._aes.decrypt(block);
-
-                   for (var j = 0; j < 16; j++) {
-                       plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
-                   }
-
-                   copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
-               }
-
-               return plaintext;
-           };
-
-
-           /**
-            *  Mode Of Operation - Cipher Feedback (CFB)
-            */
-           var ModeOfOperationCFB = function(key, iv, segmentSize) {
-               if (!(this instanceof ModeOfOperationCFB)) {
-                   throw Error('AES must be instanitated with `new`');
-               }
-
-               this.description = "Cipher Feedback";
-               this.name = "cfb";
-
-               if (!iv) {
-                   iv = createArray(16);
-
-               } else if (iv.length != 16) {
-                   throw new Error('invalid initialation vector size (must be 16 size)');
-               }
-
-               if (!segmentSize) { segmentSize = 1; }
-
-               this.segmentSize = segmentSize;
-
-               this._shiftRegister = coerceArray(iv, true);
-
-               this._aes = new AES(key);
-           };
-
-           ModeOfOperationCFB.prototype.encrypt = function(plaintext) {
-               if ((plaintext.length % this.segmentSize) != 0) {
-                   throw new Error('invalid plaintext size (must be segmentSize bytes)');
-               }
-
-               var encrypted = coerceArray(plaintext, true);
-
-               var xorSegment;
-               for (var i = 0; i < encrypted.length; i += this.segmentSize) {
-                   xorSegment = this._aes.encrypt(this._shiftRegister);
-                   for (var j = 0; j < this.segmentSize; j++) {
-                       encrypted[i + j] ^= xorSegment[j];
-                   }
-
-                   // Shift the register
-                   copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
-                   copyArray(encrypted, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
-               }
-
-               return encrypted;
-           };
-
-           ModeOfOperationCFB.prototype.decrypt = function(ciphertext) {
-               if ((ciphertext.length % this.segmentSize) != 0) {
-                   throw new Error('invalid ciphertext size (must be segmentSize bytes)');
-               }
-
-               var plaintext = coerceArray(ciphertext, true);
-
-               var xorSegment;
-               for (var i = 0; i < plaintext.length; i += this.segmentSize) {
-                   xorSegment = this._aes.encrypt(this._shiftRegister);
-
-                   for (var j = 0; j < this.segmentSize; j++) {
-                       plaintext[i + j] ^= xorSegment[j];
-                   }
-
-                   // Shift the register
-                   copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
-                   copyArray(ciphertext, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
-               }
-
-               return plaintext;
-           };
-
-           /**
-            *  Mode Of Operation - Output Feedback (OFB)
-            */
-           var ModeOfOperationOFB = function(key, iv) {
-               if (!(this instanceof ModeOfOperationOFB)) {
-                   throw Error('AES must be instanitated with `new`');
-               }
-
-               this.description = "Output Feedback";
-               this.name = "ofb";
-
-               if (!iv) {
-                   iv = createArray(16);
-
-               } else if (iv.length != 16) {
-                   throw new Error('invalid initialation vector size (must be 16 bytes)');
-               }
-
-               this._lastPrecipher = coerceArray(iv, true);
-               this._lastPrecipherIndex = 16;
-
-               this._aes = new AES(key);
-           };
-
-           ModeOfOperationOFB.prototype.encrypt = function(plaintext) {
-               var encrypted = coerceArray(plaintext, true);
-
-               for (var i = 0; i < encrypted.length; i++) {
-                   if (this._lastPrecipherIndex === 16) {
-                       this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
-                       this._lastPrecipherIndex = 0;
-                   }
-                   encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
-               }
-
-               return encrypted;
-           };
-
-           // Decryption is symetric
-           ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
-
-
-           /**
-            *  Counter object for CTR common mode of operation
-            */
-           var Counter = function(initialValue) {
-               if (!(this instanceof Counter)) {
-                   throw Error('Counter must be instanitated with `new`');
-               }
-
-               // We allow 0, but anything false-ish uses the default 1
-               if (initialValue !== 0 && !initialValue) { initialValue = 1; }
-
-               if (typeof(initialValue) === 'number') {
-                   this._counter = createArray(16);
-                   this.setValue(initialValue);
-
-               } else {
-                   this.setBytes(initialValue);
-               }
-           };
-
-           Counter.prototype.setValue = function(value) {
-               if (typeof(value) !== 'number' || parseInt(value) != value) {
-                   throw new Error('invalid counter value (must be an integer)');
-               }
-
-               // We cannot safely handle numbers beyond the safe range for integers
-               if (value > Number.MAX_SAFE_INTEGER) {
-                   throw new Error('integer value out of safe range');
-               }
-
-               for (var index = 15; index >= 0; --index) {
-                   this._counter[index] = value % 256;
-                   value = parseInt(value / 256);
-               }
-           };
-
-           Counter.prototype.setBytes = function(bytes) {
-               bytes = coerceArray(bytes, true);
-
-               if (bytes.length != 16) {
-                   throw new Error('invalid counter bytes size (must be 16 bytes)');
-               }
-
-               this._counter = bytes;
-           };
-
-           Counter.prototype.increment = function() {
-               for (var i = 15; i >= 0; i--) {
-                   if (this._counter[i] === 255) {
-                       this._counter[i] = 0;
-                   } else {
-                       this._counter[i]++;
-                       break;
-                   }
-               }
-           };
-
-
-           /**
-            *  Mode Of Operation - Counter (CTR)
-            */
-           var ModeOfOperationCTR = function(key, counter) {
-               if (!(this instanceof ModeOfOperationCTR)) {
-                   throw Error('AES must be instanitated with `new`');
-               }
-
-               this.description = "Counter";
-               this.name = "ctr";
-
-               if (!(counter instanceof Counter)) {
-                   counter = new Counter(counter);
-               }
-
-               this._counter = counter;
-
-               this._remainingCounter = null;
-               this._remainingCounterIndex = 16;
-
-               this._aes = new AES(key);
-           };
-
-           ModeOfOperationCTR.prototype.encrypt = function(plaintext) {
-               var encrypted = coerceArray(plaintext, true);
-
-               for (var i = 0; i < encrypted.length; i++) {
-                   if (this._remainingCounterIndex === 16) {
-                       this._remainingCounter = this._aes.encrypt(this._counter._counter);
-                       this._remainingCounterIndex = 0;
-                       this._counter.increment();
-                   }
-                   encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
-               }
-
-               return encrypted;
-           };
-
-           // Decryption is symetric
-           ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt;
-
-
-           ///////////////////////
-           // Padding
-
-           // See:https://tools.ietf.org/html/rfc2315
-           function pkcs7pad(data) {
-               data = coerceArray(data, true);
-               var padder = 16 - (data.length % 16);
-               var result = createArray(data.length + padder);
-               copyArray(data, result);
-               for (var i = data.length; i < result.length; i++) {
-                   result[i] = padder;
-               }
-               return result;
-           }
-
-           function pkcs7strip(data) {
-               data = coerceArray(data, true);
-               if (data.length < 16) { throw new Error('PKCS#7 invalid length'); }
-
-               var padder = data[data.length - 1];
-               if (padder > 16) { throw new Error('PKCS#7 padding byte out of range'); }
-
-               var length = data.length - padder;
-               for (var i = 0; i < padder; i++) {
-                   if (data[length + i] !== padder) {
-                       throw new Error('PKCS#7 invalid padding byte');
-                   }
-               }
-
-               var result = createArray(length);
-               copyArray(data, result, 0, 0, length);
-               return result;
-           }
-
-           ///////////////////////
-           // Exporting
-
-
-           // The block cipher
-           var aesjs = {
-               AES: AES,
-               Counter: Counter,
-
-               ModeOfOperation: {
-                   ecb: ModeOfOperationECB,
-                   cbc: ModeOfOperationCBC,
-                   cfb: ModeOfOperationCFB,
-                   ofb: ModeOfOperationOFB,
-                   ctr: ModeOfOperationCTR
-               },
-
-               utils: {
-                   hex: convertHex,
-                   utf8: convertUtf8
-               },
-
-               padding: {
-                   pkcs7: {
-                       pad: pkcs7pad,
-                       strip: pkcs7strip
-                   }
-               },
-
-               _arrayTest: {
-                   coerceArray: coerceArray,
-                   createArray: createArray,
-                   copyArray: copyArray,
-               }
-           };
-
-
-           // node.js
-           {
-               module.exports = aesjs;
-
-           // RequireJS/AMD
-           // http://www.requirejs.org/docs/api.html
-           // https://github.com/amdjs/amdjs-api/wiki/AMD
-           }
-
-
-       })();
-       });
-
-       // See https://github.com/ricmoo/aes-js
-       // We can use keys that are 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes).
-       // To generate a random key:  window.crypto.getRandomValues(new Uint8Array(16));
-
-       // This default signing key is built into iD and can be used to mask/unmask sensitive values.
-       var DEFAULT_128 = [250, 157, 60, 79, 142, 134, 229, 129, 138, 126, 210, 129, 29, 71, 160, 208];
-
-
-       function utilAesEncrypt(text, key) {
-         key = key || DEFAULT_128;
-         var textBytes = aesJs.utils.utf8.toBytes(text);
-         var aesCtr = new aesJs.ModeOfOperation.ctr(key);
-         var encryptedBytes = aesCtr.encrypt(textBytes);
-         var encryptedHex = aesJs.utils.hex.fromBytes(encryptedBytes);
-         return encryptedHex;
-       }
-
-
-       function utilAesDecrypt(encryptedHex, key) {
-         key = key || DEFAULT_128;
-         var encryptedBytes = aesJs.utils.hex.toBytes(encryptedHex);
-         var aesCtr = new aesJs.ModeOfOperation.ctr(key);
-         var decryptedBytes = aesCtr.decrypt(encryptedBytes);
-         var text = aesJs.utils.utf8.fromBytes(decryptedBytes);
-         return text;
-       }
-
-       function utilCleanTags(tags) {
-           var out = {};
-           for (var k in tags) {
-               if (!k) { continue; }
-               var v = tags[k];
-               if (v !== undefined) {
-                   out[k] = cleanValue(k, v);
-               }
-           }
-
-           return out;
-
-
-           function cleanValue(k, v) {
-               function keepSpaces(k) {
-                   return /_hours|_times|:conditional$/.test(k);
-               }
-
-               function skip(k) {
-                   return /^(description|note|fixme)$/.test(k);
-               }
-
-               if (skip(k)) { return v; }
-
-               var cleaned = v
-                   .split(';')
-                   .map(function(s) { return s.trim(); })
-                   .join(keepSpaces(k) ? '; ' : ';');
-
-               // The code below is not intended to validate websites and emails.
-               // It is only intended to prevent obvious copy-paste errors. (#2323)
-               // clean website- and email-like tags
-               if (k.indexOf('website') !== -1 ||
-                   k.indexOf('email') !== -1 ||
-                   cleaned.indexOf('http') === 0) {
-                   cleaned = cleaned
-                       .replace(/[\u200B-\u200F\uFEFF]/g, '');  // strip LRM and other zero width chars
-
-               }
-
-               return cleaned;
-           }
-       }
-
-       // Like selection.property('value', ...), but avoids no-op value sets,
-       // which can result in layout/repaint thrashing in some situations.
-       function utilGetSetValue(selection, value) {
-           function d3_selection_value(value) {
-               function valueNull() {
-                   delete this.value;
-               }
-
-               function valueConstant() {
-                   if (this.value !== value) {
-                       this.value = value;
-                   }
-               }
-
-               function valueFunction() {
-                   var x = value.apply(this, arguments);
-                   if (x == null) {
-                       delete this.value;
-                   } else if (this.value !== x) {
-                       this.value = x;
-                   }
-               }
-
-               return value == null
-                   ? valueNull : (typeof value === 'function'
-                   ? valueFunction : valueConstant);
-           }
-
-           if (arguments.length === 1) {
-               return selection.property('value');
-           }
-
-           return selection.each(d3_selection_value(value));
-       }
-
-       function utilKeybinding(namespace) {
-           var _keybindings = {};
-
-
-           function testBindings(isCapturing) {
-               var didMatch = false;
-               var bindings = Object.keys(_keybindings).map(function(id) { return _keybindings[id]; });
-               var i, binding;
-
-               // Most key shortcuts will accept either lower or uppercase ('h' or 'H'),
-               // so we don't strictly match on the shift key, but we prioritize
-               // shifted keybindings first, and fallback to unshifted only if no match.
-               // (This lets us differentiate between '←'/'⇧←' or '⌘Z'/'⌘⇧Z')
-
-               // priority match shifted keybindings first
-               for (i = 0; i < bindings.length; i++) {
-                   binding = bindings[i];
-                   if (!binding.event.modifiers.shiftKey) { continue; }  // no shift
-                   if (!!binding.capture !== isCapturing) { continue; }
-                   if (matches(binding, true)) {
-                       binding.callback();
-                       didMatch = true;
-                   }
-               }
-
-               // then unshifted keybindings
-               if (didMatch) { return; }
-               for (i = 0; i < bindings.length; i++) {
-                   binding = bindings[i];
-                   if (binding.event.modifiers.shiftKey) { continue; }   // shift
-                   if (!!binding.capture !== isCapturing) { continue; }
-                   if (matches(binding, false)) {
-                       binding.callback();
-                   }
-               }
-
-
-               function matches(binding, testShift) {
-                   var event$1 = event;
-                   var isMatch = false;
-                   var tryKeyCode = true;
-
-                   // Prefer a match on `KeyboardEvent.key`
-                   if (event$1.key !== undefined) {
-                       tryKeyCode = (event$1.key.charCodeAt(0) > 255);  // outside ISO-Latin-1
-                       isMatch = true;
-
-                       if (binding.event.key === undefined) {
-                           isMatch = false;
-                       } else if (Array.isArray(binding.event.key)) {
-                           if (binding.event.key.map(function(s) { return s.toLowerCase(); }).indexOf(event$1.key.toLowerCase()) === -1)
-                               { isMatch = false; }
-                       } else {
-                           if (event$1.key.toLowerCase() !== binding.event.key.toLowerCase())
-                               { isMatch = false; }
-                       }
-                   }
-
-                   // Fallback match on `KeyboardEvent.keyCode`, can happen if:
-                   // - browser doesn't support `KeyboardEvent.key`
-                   // - `KeyboardEvent.key` is outside ISO-Latin-1 range (cyrillic?)
-                   if (!isMatch && tryKeyCode) {
-                       isMatch = (event$1.keyCode === binding.event.keyCode);
-                   }
-
-                   if (!isMatch) { return false; }
-
-                   // test modifier keys
-                   if (!(event$1.ctrlKey && event$1.altKey)) {  // if both are set, assume AltGr and skip it - #4096
-                       if (event$1.ctrlKey !== binding.event.modifiers.ctrlKey) { return false; }
-                       if (event$1.altKey !== binding.event.modifiers.altKey) { return false; }
-                   }
-                   if (event$1.metaKey !== binding.event.modifiers.metaKey) { return false; }
-                   if (testShift && event$1.shiftKey !== binding.event.modifiers.shiftKey) { return false; }
-
-                   return true;
-               }
-           }
-
-
-           function capture() {
-               testBindings(true);
-           }
-
-
-           function bubble() {
-               var tagName = select(event.target).node().tagName;
-               if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
-                   return;
-               }
-               testBindings(false);
-           }
-
-
-           function keybinding(selection) {
-               selection = selection || select(document);
-               selection.on('keydown.capture.' + namespace, capture, true);
-               selection.on('keydown.bubble.' + namespace, bubble, false);
-               return keybinding;
-           }
-
-           // was: keybinding.off()
-           keybinding.unbind = function(selection) {
-               _keybindings = [];
-               selection = selection || select(document);
-               selection.on('keydown.capture.' + namespace, null);
-               selection.on('keydown.bubble.' + namespace, null);
-               return keybinding;
-           };
-
-
-           keybinding.clear = function() {
-               _keybindings = {};
-               return keybinding;
-           };
-
-
-           // Remove one or more keycode bindings.
-           keybinding.off = function(codes, capture) {
-               var arr = utilArrayUniq([].concat(codes));
-
-               for (var i = 0; i < arr.length; i++) {
-                   var id = arr[i] + (capture ? '-capture' : '-bubble');
-                   delete _keybindings[id];
-               }
-               return keybinding;
-           };
-
-
-           // Add one or more keycode bindings.
-           keybinding.on = function(codes, callback, capture) {
-               if (typeof callback !== 'function') {
-                   return keybinding.off(codes, capture);
-               }
-
-               var arr = utilArrayUniq([].concat(codes));
-
-               for (var i = 0; i < arr.length; i++) {
-                   var id = arr[i] + (capture ? '-capture' : '-bubble');
-                   var binding = {
-                       id: id,
-                       capture: capture,
-                       callback: callback,
-                       event: {
-                           key: undefined,  // preferred
-                           keyCode: 0,      // fallback
-                           modifiers: {
-                               shiftKey: false,
-                               ctrlKey: false,
-                               altKey: false,
-                               metaKey: false
-                           }
-                       }
-                   };
-
-                   if (_keybindings[id]) {
-                       console.warn('warning: duplicate keybinding for "' + id + '"'); // eslint-disable-line no-console
-                   }
-
-                   _keybindings[id] = binding;
-
-                   var matches = arr[i].toLowerCase().match(/(?:(?:[^+⇧⌃⌥⌘])+|[⇧⌃⌥⌘]|\+\+|^\+$)/g);
-                   for (var j = 0; j < matches.length; j++) {
-                       // Normalise matching errors
-                       if (matches[j] === '++') { matches[j] = '+'; }
-
-                       if (matches[j] in utilKeybinding.modifierCodes) {
-                           var prop = utilKeybinding.modifierProperties[utilKeybinding.modifierCodes[matches[j]]];
-                           binding.event.modifiers[prop] = true;
-                       } else {
-                           binding.event.key = utilKeybinding.keys[matches[j]] || matches[j];
-                           if (matches[j] in utilKeybinding.keyCodes) {
-                               binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
-                           }
-                       }
-                   }
-               }
-
-               return keybinding;
-           };
-
-
-           return keybinding;
-       }
-
-
-       /*
-        * See https://github.com/keithamus/jwerty
-        */
-
-       utilKeybinding.modifierCodes = {
-           // Shift key, ⇧
-           '⇧': 16, shift: 16,
-           // CTRL key, on Mac: ⌃
-           '⌃': 17, ctrl: 17,
-           // ALT key, on Mac: ⌥ (Alt)
-           '⌥': 18, alt: 18, option: 18,
-           // META, on Mac: ⌘ (CMD), on Windows (Win), on Linux (Super)
-           '⌘': 91, meta: 91, cmd: 91, 'super': 91, win: 91
-       };
-
-       utilKeybinding.modifierProperties = {
-           16: 'shiftKey',
-           17: 'ctrlKey',
-           18: 'altKey',
-           91: 'metaKey'
-       };
-
-       utilKeybinding.keys = {
-           // Backspace key, on Mac: ⌫ (Backspace)
-           '⌫': 'Backspace', backspace: 'Backspace',
-           // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
-           '⇥': 'Tab', '⇆': 'Tab', tab: 'Tab',
-           // Return key, ↩
-           '↩': 'Enter', 'return': 'Enter', enter: 'Enter', '⌅': 'Enter',
-           // Pause/Break key
-           'pause': 'Pause', 'pause-break': 'Pause',
-           // Caps Lock key, ⇪
-           '⇪': 'CapsLock', caps: 'CapsLock', 'caps-lock': 'CapsLock',
-           // Escape key, on Mac: ⎋, on Windows: Esc
-           '⎋': ['Escape', 'Esc'], escape: ['Escape', 'Esc'], esc: ['Escape', 'Esc'],
-           // Space key
-           space: [' ', 'Spacebar'],
-           // Page-Up key, or pgup, on Mac: ↖
-           '↖': 'PageUp', pgup: 'PageUp', 'page-up': 'PageUp',
-           // Page-Down key, or pgdown, on Mac: ↘
-           '↘': 'PageDown', pgdown: 'PageDown', 'page-down': 'PageDown',
-           // END key, on Mac: ⇟
-           '⇟': 'End', end: 'End',
-           // HOME key, on Mac: ⇞
-           '⇞': 'Home', home: 'Home',
-           // Insert key, or ins
-           ins: 'Insert', insert: 'Insert',
-           // Delete key, on Mac: ⌦ (Delete)
-           '⌦': ['Delete', 'Del'], del: ['Delete', 'Del'], 'delete': ['Delete', 'Del'],
-           // Left Arrow Key, or ←
-           '←': ['ArrowLeft', 'Left'], left: ['ArrowLeft', 'Left'], 'arrow-left': ['ArrowLeft', 'Left'],
-           // Up Arrow Key, or ↑
-           '↑': ['ArrowUp', 'Up'], up: ['ArrowUp', 'Up'], 'arrow-up': ['ArrowUp', 'Up'],
-           // Right Arrow Key, or →
-           '→': ['ArrowRight', 'Right'], right: ['ArrowRight', 'Right'], 'arrow-right': ['ArrowRight', 'Right'],
-           // Up Arrow Key, or ↓
-           '↓': ['ArrowDown', 'Down'], down: ['ArrowDown', 'Down'], 'arrow-down': ['ArrowDown', 'Down'],
-           // odities, stuff for backward compatibility (browsers and code):
-           // Num-Multiply, or *
-           '*': ['*', 'Multiply'], star: ['*', 'Multiply'], asterisk: ['*', 'Multiply'], multiply: ['*', 'Multiply'],
-           // Num-Plus or +
-           '+': ['+', 'Add'], 'plus': ['+', 'Add'],
-           // Num-Subtract, or -
-           '-': ['-', 'Subtract'], subtract: ['-', 'Subtract'], 'dash': ['-', 'Subtract'],
-           // Semicolon
-           semicolon: ';',
-           // = or equals
-           equals: '=',
-           // Comma, or ,
-           comma: ',',
-           // Period, or ., or full-stop
-           period: '.', 'full-stop': '.',
-           // Slash, or /, or forward-slash
-           slash: '/', 'forward-slash': '/',
-           // Tick, or `, or back-quote
-           tick: '`', 'back-quote': '`',
-           // Open bracket, or [
-           'open-bracket': '[',
-           // Back slash, or \
-           'back-slash': '\\',
-           // Close backet, or ]
-           'close-bracket': ']',
-           // Apostrophe, or Quote, or '
-           quote: '\'', apostrophe: '\'',
-           // NUMPAD 0-9
-           'num-0': '0',
-           'num-1': '1',
-           'num-2': '2',
-           'num-3': '3',
-           'num-4': '4',
-           'num-5': '5',
-           'num-6': '6',
-           'num-7': '7',
-           'num-8': '8',
-           'num-9': '9',
-           // F1-F25
-           f1: 'F1',
-           f2: 'F2',
-           f3: 'F3',
-           f4: 'F4',
-           f5: 'F5',
-           f6: 'F6',
-           f7: 'F7',
-           f8: 'F8',
-           f9: 'F9',
-           f10: 'F10',
-           f11: 'F11',
-           f12: 'F12',
-           f13: 'F13',
-           f14: 'F14',
-           f15: 'F15',
-           f16: 'F16',
-           f17: 'F17',
-           f18: 'F18',
-           f19: 'F19',
-           f20: 'F20',
-           f21: 'F21',
-           f22: 'F22',
-           f23: 'F23',
-           f24: 'F24',
-           f25: 'F25'
-       };
-
-       utilKeybinding.keyCodes = {
-           // Backspace key, on Mac: ⌫ (Backspace)
-           '⌫': 8, backspace: 8,
-           // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
-           '⇥': 9, '⇆': 9, tab: 9,
-           // Return key, ↩
-           '↩': 13, 'return': 13, enter: 13, '⌅': 13,
-           // Pause/Break key
-           'pause': 19, 'pause-break': 19,
-           // Caps Lock key, ⇪
-           '⇪': 20, caps: 20, 'caps-lock': 20,
-           // Escape key, on Mac: ⎋, on Windows: Esc
-           '⎋': 27, escape: 27, esc: 27,
-           // Space key
-           space: 32,
-           // Page-Up key, or pgup, on Mac: ↖
-           '↖': 33, pgup: 33, 'page-up': 33,
-           // Page-Down key, or pgdown, on Mac: ↘
-           '↘': 34, pgdown: 34, 'page-down': 34,
-           // END key, on Mac: ⇟
-           '⇟': 35, end: 35,
-           // HOME key, on Mac: ⇞
-           '⇞': 36, home: 36,
-           // Insert key, or ins
-           ins: 45, insert: 45,
-           // Delete key, on Mac: ⌦ (Delete)
-           '⌦': 46, del: 46, 'delete': 46,
-           // Left Arrow Key, or ←
-           '←': 37, left: 37, 'arrow-left': 37,
-           // Up Arrow Key, or ↑
-           '↑': 38, up: 38, 'arrow-up': 38,
-           // Right Arrow Key, or →
-           '→': 39, right: 39, 'arrow-right': 39,
-           // Up Arrow Key, or ↓
-           '↓': 40, down: 40, 'arrow-down': 40,
-           // odities, printing characters that come out wrong:
-           // Firefox Equals
-           'ffequals': 61,
-           // Num-Multiply, or *
-           '*': 106, star: 106, asterisk: 106, multiply: 106,
-           // Num-Plus or +
-           '+': 107, 'plus': 107,
-           // Num-Subtract, or -
-           '-': 109, subtract: 109,
-           // Firefox Plus
-           'ffplus': 171,
-           // Firefox Minus
-           'ffminus': 173,
-           // Semicolon
-           ';': 186, semicolon: 186,
-           // = or equals
-           '=': 187, 'equals': 187,
-           // Comma, or ,
-           ',': 188, comma: 188,
-           // Dash / Underscore key
-           'dash': 189,
-           // Period, or ., or full-stop
-           '.': 190, period: 190, 'full-stop': 190,
-           // Slash, or /, or forward-slash
-           '/': 191, slash: 191, 'forward-slash': 191,
-           // Tick, or `, or back-quote
-           '`': 192, tick: 192, 'back-quote': 192,
-           // Open bracket, or [
-           '[': 219, 'open-bracket': 219,
-           // Back slash, or \
-           '\\': 220, 'back-slash': 220,
-           // Close backet, or ]
-           ']': 221, 'close-bracket': 221,
-           // Apostrophe, or Quote, or '
-           '\'': 222, quote: 222, apostrophe: 222
-       };
-
-       // NUMPAD 0-9
-       var i$2 = 95, n = 0;
-       while (++i$2 < 106) {
-           utilKeybinding.keyCodes['num-' + n] = i$2;
-           ++n;
-       }
-
-       // 0-9
-       i$2 = 47; n = 0;
-       while (++i$2 < 58) {
-           utilKeybinding.keyCodes[n] = i$2;
-           ++n;
-       }
-
-       // F1-F25
-       i$2 = 111; n = 1;
-       while (++i$2 < 136) {
-           utilKeybinding.keyCodes['f' + n] = i$2;
-           ++n;
-       }
-
-       // a-z
-       i$2 = 64;
-       while (++i$2 < 91) {
-           utilKeybinding.keyCodes[String.fromCharCode(i$2).toLowerCase()] = i$2;
-       }
-
-       function utilObjectOmit(obj, omitKeys) {
-           return Object.keys(obj).reduce(function(result, key) {
-               if (omitKeys.indexOf(key) === -1) {
-                   result[key] = obj[key];  // keep
-               }
-               return result;
-           }, {});
-       }
-
-       // Copies a variable number of methods from source to target.
-       function utilRebind(target, source) {
-           var arguments$1 = arguments;
-
-           var i = 1, n = arguments.length, method;
-           while (++i < n) {
-               target[method = arguments$1[i]] = d3_rebind(target, source, source[method]);
-           }
-           return target;
-       }
-
-       // Method is assumed to be a standard D3 getter-setter:
-       // If passed with no arguments, gets the value.
-       // If passed with arguments, sets the value and returns the target.
-       function d3_rebind(target, source, method) {
-           return function() {
-               var value = method.apply(source, arguments);
-               return value === source ? target : value;
-           };
-       }
-
-       // A per-domain session mutex backed by a cookie and dead man's
-       // switch. If the session crashes, the mutex will auto-release
-       // after 5 seconds.
-
-       // This accepts a string and returns an object that complies with utilSessionMutexType
-       function utilSessionMutex(name) {
-           var mutex = {};
-           var intervalID;
-
-           function renew() {
-               var expires = new Date();
-               expires.setSeconds(expires.getSeconds() + 5);
-               document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
-           }
-
-           mutex.lock = function () {
-               if (intervalID) { return true; }
-               var cookie = document.cookie.replace(new RegExp('(?:(?:^|.*;)\\s*' + name + '\\s*\\=\\s*([^;]*).*$)|^.*$'), '$1');
-               if (cookie) { return false; }
-               renew();
-               intervalID = window.setInterval(renew, 4000);
-               return true;
-           };
-
-           mutex.unlock = function () {
-               if (!intervalID) { return; }
-               document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
-               clearInterval(intervalID);
-               intervalID = null;
-           };
-
-           mutex.locked = function () {
-               return !!intervalID;
-           };
-
-           return mutex;
-       }
-
-       function utilTiler() {
-           var _size = [256, 256];
-           var _scale = 256;
-           var _tileSize = 256;
-           var _zoomExtent = [0, 20];
-           var _translate = [_size[0] / 2, _size[1] / 2];
-           var _margin = 0;
-           var _skipNullIsland = false;
-
-
-           function clamp(num, min, max) {
-               return Math.max(min, Math.min(num, max));
-           }
-
-
-           function nearNullIsland(tile) {
-               var x = tile[0];
-               var y = tile[1];
-               var z = tile[2];
-               if (z >= 7) {
-                   var center = Math.pow(2, z - 1);
-                   var width = Math.pow(2, z - 6);
-                   var min = center - (width / 2);
-                   var max = center + (width / 2) - 1;
-                   return x >= min && x <= max && y >= min && y <= max;
-               }
-               return false;
-           }
-
-
-           function tiler() {
-               var z = geoScaleToZoom(_scale / (2 * Math.PI), _tileSize);
-               var z0 = clamp(Math.round(z), _zoomExtent[0], _zoomExtent[1]);
-               var tileMin = 0;
-               var tileMax = Math.pow(2, z0) - 1;
-               var log2ts = Math.log(_tileSize) * Math.LOG2E;
-               var k = Math.pow(2, z - z0 + log2ts);
-               var origin = [
-                   (_translate[0] - _scale / 2) / k,
-                   (_translate[1] - _scale / 2) / k
-               ];
-
-               var cols = range$1(
-                   clamp(Math.floor(-origin[0]) - _margin,               tileMin, tileMax + 1),
-                   clamp(Math.ceil(_size[0] / k - origin[0]) + _margin,  tileMin, tileMax + 1)
-               );
-               var rows = range$1(
-                   clamp(Math.floor(-origin[1]) - _margin,               tileMin, tileMax + 1),
-                   clamp(Math.ceil(_size[1] / k - origin[1]) + _margin,  tileMin, tileMax + 1)
-               );
-
-               var tiles = [];
-               for (var i = 0; i < rows.length; i++) {
-                   var y = rows[i];
-                   for (var j = 0; j < cols.length; j++) {
-                       var x = cols[j];
-
-                       if (i >= _margin && i <= rows.length - _margin &&
-                           j >= _margin && j <= cols.length - _margin) {
-                           tiles.unshift([x, y, z0]);  // tiles in view at beginning
-                       } else {
-                           tiles.push([x, y, z0]);     // tiles in margin at the end
-                       }
-                   }
-               }
-
-               tiles.translate = origin;
-               tiles.scale = k;
-
-               return tiles;
-           }
-
-
-           /**
-            * getTiles() returns an array of tiles that cover the map view
-            */
-           tiler.getTiles = function(projection) {
-               var origin = [
-                   projection.scale() * Math.PI - projection.translate()[0],
-                   projection.scale() * Math.PI - projection.translate()[1]
-               ];
-
-               this
-                   .size(projection.clipExtent()[1])
-                   .scale(projection.scale() * 2 * Math.PI)
-                   .translate(projection.translate());
-
-               var tiles = tiler();
-               var ts = tiles.scale;
-
-               return tiles
-                   .map(function(tile) {
-                       if (_skipNullIsland && nearNullIsland(tile)) {
-                           return false;
-                       }
-                       var x = tile[0] * ts - origin[0];
-                       var y = tile[1] * ts - origin[1];
-                       return {
-                           id: tile.toString(),
-                           xyz: tile,
-                           extent: geoExtent(
-                               projection.invert([x, y + ts]),
-                               projection.invert([x + ts, y])
-                           )
-                       };
-                   }).filter(Boolean);
-           };
-
-
-           /**
-            * getGeoJSON() returns a FeatureCollection for debugging tiles
-            */
-           tiler.getGeoJSON = function(projection) {
-               var features = tiler.getTiles(projection).map(function(tile) {
-                   return {
-                       type: 'Feature',
-                       properties: {
-                           id: tile.id,
-                           name: tile.id
-                       },
-                       geometry: {
-                           type: 'Polygon',
-                           coordinates: [ tile.extent.polygon() ]
-                       }
-                   };
-               });
-
-               return {
-                   type: 'FeatureCollection',
-                   features: features
-               };
-           };
-
-
-           tiler.tileSize = function(val) {
-               if (!arguments.length) { return _tileSize; }
-               _tileSize = val;
-               return tiler;
-           };
-
-
-           tiler.zoomExtent = function(val) {
-               if (!arguments.length) { return _zoomExtent; }
-               _zoomExtent = val;
-               return tiler;
-           };
-
-
-           tiler.size = function(val) {
-               if (!arguments.length) { return _size; }
-               _size = val;
-               return tiler;
-           };
-
-
-           tiler.scale = function(val) {
-               if (!arguments.length) { return _scale; }
-               _scale = val;
-               return tiler;
-           };
-
-
-           tiler.translate = function(val) {
-               if (!arguments.length) { return _translate; }
-               _translate = val;
-               return tiler;
-           };
-
-
-           // number to extend the rows/columns beyond those covering the viewport
-           tiler.margin = function(val) {
-               if (!arguments.length) { return _margin; }
-               _margin = +val;
-               return tiler;
-           };
-
-
-           tiler.skipNullIsland = function(val) {
-               if (!arguments.length) { return _skipNullIsland; }
-               _skipNullIsland = val;
-               return tiler;
-           };
-
-
-           return tiler;
-       }
-
-       function utilTriggerEvent(target, type) {
-           target.each(function() {
-               var evt = document.createEvent('HTMLEvents');
-               evt.initEvent(type, true, true);
-               this.dispatchEvent(evt);
-           });
-       }
-
-       var _mainLocalizer = coreLocalizer(); // singleton
-       var _t = _mainLocalizer.t;
-
-       //
-       // coreLocalizer manages language and locale parameters including translated strings
-       //
-       function coreLocalizer() {
-
-           var localizer = {};
-
-           var _dataLanguages = {};
-
-           // `localeData` is an object containing all _supported_ locale codes -> language info.
-           // {
-           // en: { rtl: false, languageNames: {…}, scriptNames: {…} },
-           // de: { rtl: false, languageNames: {…}, scriptNames: {…} },
-           // …
-           // }
-           var _dataLocales = {};
-
-           // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
-           // {
-           // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-           // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-           // …
-           // }
-           var _localeStrings = {};
-
-           // the current locale parameters
-           var _localeCode = 'en-US';
-           var _languageCode = 'en';
-           var _textDirection = 'ltr';
-           var _usesMetric = false;
-           var _languageNames = {};
-           var _scriptNames = {};
-
-           // getters for the current locale parameters
-           localizer.localeCode = function () { return _localeCode; };
-           localizer.languageCode = function () { return _languageCode; };
-           localizer.textDirection = function () { return _textDirection; };
-           localizer.usesMetric = function () { return _usesMetric; };
-           localizer.languageNames = function () { return _languageNames; };
-           localizer.scriptNames = function () { return _scriptNames; };
-
-
-           // The client app may want to manually set the locale, regardless of the
-           // settings provided by the browser
-           var _preferredLocaleCodes = [];
-           localizer.preferredLocaleCodes = function(codes) {
-               if (!arguments.length) { return _preferredLocaleCodes; }
-               if (typeof codes === 'string') {
-                   // be generous and accept delimited strings as input
-                   _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
-               } else {
-                   _preferredLocaleCodes = codes;
-               }
-               return localizer;
-           };
-
-
-           var _loadPromise;
-
-           localizer.ensureLoaded = function () {
-
-               if (_loadPromise) { return _loadPromise; }
-
-               return _loadPromise = Promise.all([
-                       // load the list of langauges
-                       _mainFileFetcher.get('languages'),
-                       // load the list of supported locales
-                       _mainFileFetcher.get('locales')
-                   ])
-                   .then(function (results) {
-                       _dataLanguages = results[0];
-                       _dataLocales = results[1];
-                   })
-                   .then(function () {
-                       var requestedLocales = (_preferredLocaleCodes || [])
-                           // list of locales preferred by the browser in priority order
-                           .concat(utilDetect().browserLocales);
-                       _localeCode = bestSupportedLocale(requestedLocales);
-
-                       return Promise.all([
-                           // always load the English locale strings as fallbacks
-                           localizer.loadLocale('en'),
-                           // load the preferred locale
-                           localizer.loadLocale(_localeCode)
-                       ]);
-                   })
-                   .then(function () {
-                       updateForCurrentLocale();
-                   })
-                   .catch(function (err) { return console.error(err); });  // eslint-disable-line
-           };
-
-           // Returns the best locale from `locales` supported by iD, if any
-           function bestSupportedLocale(locales) {
-               var supportedLocales = _dataLocales;
-
-               var loop = function ( i ) {
-                   var locale = locales[i];
-                   if (locale.includes('-')) { // full locale ('es-ES')
-
-                       if (supportedLocales[locale]) { return { v: locale }; }
-
-                       // If full locale not supported ('es-FAKE'), fallback to the base ('es')
-                       var langPart = locale.split('-')[0];
-                       if (supportedLocales[langPart]) { return { v: langPart }; }
-
-                   } else { // base locale ('es')
-
-                       // prefer a lower-priority full locale with this base ('es' < 'es-ES')
-                       var fullLocale = locales.find(function (locale2, index) {
-                           return index > i &&
-                               locale2 !== locale &&
-                               locale2.split('-')[0] === locale &&
-                               supportedLocales[locale2];
-                       });
-                       if (fullLocale) { return { v: fullLocale }; }
-
-                       if (supportedLocales[locale]) { return { v: locale }; }
-                   }
-               };
-
-               for (var i in locales) {
-                   var returned = loop( i );
-
-                   if ( returned ) return returned.v;
-               }
-
-               return null;
-           }
-
-           function updateForCurrentLocale() {
-               if (!_localeCode) { return; }
-
-               _languageCode = _localeCode.split('-')[0];
-
-               var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
-
-               var hash = utilStringQs(window.location.hash);
-
-               if (hash.rtl === 'true') {
-                   _textDirection = 'rtl';
-               } else if (hash.rtl === 'false') {
-                   _textDirection = 'ltr';
-               }  else {
-                   _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
-               }
-
-               _languageNames = currentData && currentData.languageNames;
-               _scriptNames = currentData && currentData.scriptNames;
-
-               _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
-           }
-
-
-           /* Locales */
-           // Returns a Promise to load the strings for the requested locale
-           localizer.loadLocale = function (requested) {
-
-               if (!_dataLocales) {
-                   return Promise.reject('loadLocale called before init');
-               }
-
-               var locale = requested;
-
-               // US English is the default
-               if (locale.toLowerCase() === 'en-us') { locale = 'en'; }
-
-               if (!_dataLocales[locale]) {
-                   return Promise.reject(("Unsupported locale: " + requested));
-               }
-
-               if (_localeStrings[locale]) {    // already loaded
-                   return Promise.resolve(locale);
-               }
-
-               var fileMap = _mainFileFetcher.fileMap();
-               var key = "locale_" + locale;
-               fileMap[key] = "locales/" + locale + ".json";
-
-               return _mainFileFetcher.get(key)
-                   .then(function (d) {
-                       _localeStrings[locale] = d[locale];
-                       return locale;
-                   });
-           };
-
-           /**
-           * Given a string identifier, try to find that string in the current
-           * language, and return it.  This function will be called recursively
-           * with locale `en` if a string can not be found in the requested language.
-           *
-           * @param  {string}   s             string identifier
-           * @param  {object?}  replacements  token replacements and default string
-           * @param  {string?}  locale        locale to use (defaults to currentLocale)
-           * @return {string?}  localized string
-           */
-           localizer.t = function(s, replacements, locale) {
-               locale = locale || _localeCode;
-
-               // US English is the default
-               if (locale.toLowerCase() === 'en-us') { locale = 'en'; }
-
-               var path = s
-                 .split('.')
-                 .map(function (s) { return s.replace(/<TX_DOT>/g, '.'); })
-                 .reverse();
-
-               var result = _localeStrings[locale];
-
-               while (result !== undefined && path.length) {
-                 result = result[path.pop()];
-               }
-
-               if (result !== undefined) {
-                 if (replacements) {
-                   for (var k in replacements) {
-                     var token = "{" + k + "}";
-                     var regex = new RegExp(token, 'g');
-                     result = result.replace(regex, replacements[k]);
-                   }
-                 }
-                 return result;
-               }
-
-               if (locale !== 'en') {
-                 return localizer.t(s, replacements, 'en');  // fallback - recurse with 'en'
-               }
-
-               if (replacements && 'default' in replacements) {
-                 return replacements.default;      // fallback - replacements.default
-               }
-
-               var missing = "Missing " + locale + " translation: " + s;
-               if (typeof console !== 'undefined') { console.error(missing); }  // eslint-disable-line
-
-               return missing;
-           };
-
-           localizer.languageName = function (code, options) {
-
-               if (_languageNames[code]) {  // name in locale langauge
-                 // e.g. "German"
-                 return _languageNames[code];
-               }
-
-               // sometimes we only want the local name
-               if (options && options.localOnly) { return null; }
-
-               var langInfo = _dataLanguages[code];
-               if (langInfo) {
-                 if (langInfo.nativeName) {  // name in native language
-                   // e.g. "Deutsch (de)"
-                   return localizer.t('translate.language_and_code', { language: langInfo.nativeName, code: code });
-
-                 } else if (langInfo.base && langInfo.script) {
-                   var base = langInfo.base;   // the code of the langauge this is based on
-
-                   if (_languageNames[base]) {   // base language name in locale langauge
-                     var scriptCode = langInfo.script;
-                     var script = _scriptNames[scriptCode] || scriptCode;
-                     // e.g. "Serbian (Cyrillic)"
-                     return localizer.t('translate.language_and_code', { language: _languageNames[base], code: script });
-
-                   } else if (_dataLanguages[base] && _dataLanguages[base].nativeName) {
-                     // e.g. "српски (sr-Cyrl)"
-                     return localizer.t('translate.language_and_code', { language: _dataLanguages[base].nativeName, code: code });
-                   }
-                 }
-               }
-               return code;  // if not found, use the code
-           };
-
-           return localizer;
-       }
-
-       //
-       // `presetCollection` is a wrapper around an `Array` of presets `collection`,
-       // and decorated with some extra methods for searching and matching geometry
-       //
-       function presetCollection(collection) {
-         var MAXRESULTS = 50;
-         var _this = {};
-         var _memo = {};
-
-         _this.collection = collection;
-
-         _this.item = function (id) {
-           if (_memo[id]) { return _memo[id]; }
-           var found = _this.collection.find(function (d) { return d.id === id; });
-           if (found) { _memo[id] = found; }
-           return found;
-         };
-
-         _this.index = function (id) { return _this.collection.findIndex(function (d) { return d.id === id; }); };
-
-         _this.matchGeometry = function (geometry) {
-           return presetCollection(
-             _this.collection.filter(function (d) { return d.matchGeometry(geometry); })
-           );
-         };
-
-         _this.matchAllGeometry = function (geometries) {
-           return presetCollection(
-             _this.collection.filter(function (d) { return d && d.matchAllGeometry(geometries); })
-           );
-         };
-
-         _this.matchAnyGeometry = function (geometries) {
-           return presetCollection(
-             _this.collection.filter(function (d) { return geometries.some(function (geom) { return d.matchGeometry(geom); }); })
-           );
-         };
-
-         _this.fallback = function (geometry) {
-           var id = geometry;
-           if (id === 'vertex') { id = 'point'; }
-           return _this.item(id);
-         };
-
-         _this.search = function (value, geometry, countryCode) {
-           if (!value) { return _this; }
-
-           value = value.toLowerCase().trim();
-
-           // match at name beginning or just after a space (e.g. "office" -> match "Law Office")
-           function leading(a) {
-             var index = a.indexOf(value);
-             return index === 0 || a[index - 1] === ' ';
-           }
-
-           // match at name beginning only
-           function leadingStrict(a) {
-             var index = a.indexOf(value);
-             return index === 0;
-           }
-
-           function sortNames(a, b) {
-             var aCompare = (a.suggestion ? a.originalName : a.name()).toLowerCase();
-             var bCompare = (b.suggestion ? b.originalName : b.name()).toLowerCase();
-
-             // priority if search string matches preset name exactly - #4325
-             if (value === aCompare) { return -1; }
-             if (value === bCompare) { return 1; }
-
-             // priority for higher matchScore
-             var i = b.originalScore - a.originalScore;
-             if (i !== 0) { return i; }
-
-             // priority if search string appears earlier in preset name
-             i = aCompare.indexOf(value) - bCompare.indexOf(value);
-             if (i !== 0) { return i; }
-
-             // priority for shorter preset names
-             return aCompare.length - bCompare.length;
-           }
-
-           var pool = _this.collection;
-           if (countryCode) {
-             pool = pool.filter(function (a) {
-               if (a.countryCodes && a.countryCodes.indexOf(countryCode) === -1) { return false; }
-               if (a.notCountryCodes && a.notCountryCodes.indexOf(countryCode) !== -1) { return false; }
-               return true;
-             });
-           }
-           var searchable = pool.filter(function (a) { return a.searchable !== false && a.suggestion !== true; });
-           var suggestions = pool.filter(function (a) { return a.suggestion === true; });
-
-           // matches value to preset.name
-           var leading_name = searchable
-             .filter(function (a) { return leading(a.name().toLowerCase()); })
-             .sort(sortNames);
-
-           // matches value to preset suggestion name (original name is unhyphenated)
-           var leading_suggestions = suggestions
-             .filter(function (a) { return leadingStrict(a.originalName.toLowerCase()); })
-             .sort(sortNames);
-
-           // matches value to preset.terms values
-           var leading_terms = searchable
-             .filter(function (a) { return (a.terms() || []).some(leading); });
-
-           // matches value to preset.tags values
-           var leading_tag_values = searchable
-             .filter(function (a) { return Object.values(a.tags || {}).filter(function (val) { return val !== '*'; }).some(leading); });
-
-           // finds close matches to value in preset.name
-           var similar_name = searchable
-             .map(function (a) { return ({ preset: a, dist: utilEditDistance(value, a.name()) }); })
-             .filter(function (a) { return a.dist + Math.min(value.length - a.preset.name().length, 0) < 3; })
-             .sort(function (a, b) { return a.dist - b.dist; })
-             .map(function (a) { return a.preset; });
-
-           // finds close matches to value to preset suggestion name (original name is unhyphenated)
-           var similar_suggestions = suggestions
-             .map(function (a) { return ({ preset: a, dist: utilEditDistance(value, a.originalName.toLowerCase()) }); })
-             .filter(function (a) { return a.dist + Math.min(value.length - a.preset.originalName.length, 0) < 1; })
-             .sort(function (a, b) { return a.dist - b.dist; })
-             .map(function (a) { return a.preset; });
-
-           // finds close matches to value in preset.terms
-           var similar_terms = searchable
-             .filter(function (a) {
-               return (a.terms() || []).some(function (b) {
-                 return utilEditDistance(value, b) + Math.min(value.length - b.length, 0) < 3;
-               });
-             });
-
-           var results = leading_name.concat(
-             leading_suggestions,
-             leading_terms,
-             leading_tag_values,
-             similar_name,
-             similar_suggestions,
-             similar_terms
-           ).slice(0, MAXRESULTS - 1);
-
-           if (geometry) {
-             if (typeof geometry === 'string') {
-               results.push(_this.fallback(geometry));
-             } else {
-               geometry.forEach(function (geom) { return results.push(_this.fallback(geom)); });
-             }
-           }
-
-           return presetCollection(utilArrayUniq(results));
-         };
-
-
-         return _this;
-       }
-
-       //
-       // `presetCategory` builds a `presetCollection` of member presets,
-       // decorated with some extra methods for searching and matching geometry
-       //
-       function presetCategory(categoryID, category, all) {
-         var _this = Object.assign({}, category);   // shallow copy
-
-         _this.id = categoryID;
-
-         _this.members = presetCollection(
-           category.members.map(function (presetID) { return all.item(presetID); }).filter(Boolean)
-         );
-
-         _this.geometry = _this.members.collection
-           .reduce(function (acc, preset) {
-             for (var i in preset.geometry) {
-               var geometry = preset.geometry[i];
-               if (acc.indexOf(geometry) === -1) {
-                 acc.push(geometry);
-               }
-             }
-             return acc;
-           }, []);
-
-         _this.matchGeometry = function (geom) { return _this.geometry.indexOf(geom) >= 0; };
-
-         _this.matchAllGeometry = function (geometries) { return _this.members.collection
-           .some(function (preset) { return preset.matchAllGeometry(geometries); }); };
-
-         _this.matchScore = function () { return -1; };
-
-         _this.name = function () { return _t(("presets.categories." + categoryID + ".name"), { 'default': categoryID }); };
-
-         _this.terms = function () { return []; };
-
-
-         return _this;
-       }
-
-       //
-       // `presetField` decorates a given `field` Object
-       // with some extra methods for searching and matching geometry
-       //
-       function presetField(fieldID, field) {
-         var _this = Object.assign({}, field);   // shallow copy
-
-         _this.id = fieldID;
-
-         // for use in classes, element ids, css selectors
-         _this.safeid = utilSafeClassName(fieldID);
-
-         _this.matchGeometry = function (geom) { return !_this.geometry || _this.geometry.indexOf(geom) !== -1; };
-
-         _this.matchAllGeometry = function (geometries) {
-           return !_this.geometry || geometries.every(function (geom) { return _this.geometry.indexOf(geom) !== -1; });
-         };
-
-         _this.t = function (scope, options) { return _t(("presets.fields." + fieldID + "." + scope), options); };
-
-         _this.label = function () { return _this.overrideLabel || _this.t('label', { 'default': fieldID }); };
-
-         var _placeholder = _this.placeholder;
-         _this.placeholder = function () { return _this.t('placeholder', { 'default': _placeholder }); };
-
-         _this.originalTerms = (_this.terms || []).join();
-
-         _this.terms = function () { return _this.t('terms', { 'default': _this.originalTerms })
-           .toLowerCase().trim().split(/\s*,+\s*/); };
-
-
-         return _this;
-       }
-
-       //
-       // `presetPreset` decorates a given `preset` Object
-       // with some extra methods for searching and matching geometry
-       //
-       function presetPreset(presetID, preset, addable, allFields, allPresets) {
-         allFields = allFields || {};
-         allPresets = allPresets || {};
-         var _this = Object.assign({}, preset);   // shallow copy
-         var _addable = addable || false;
-         var _resolvedFields;      // cache
-         var _resolvedMoreFields;  // cache
-
-         _this.id = presetID;
-
-         _this.safeid = utilSafeClassName(presetID);  // for use in css classes, selectors, element ids
-
-         _this.originalTerms = (_this.terms || []).join();
-
-         _this.originalName = _this.name || '';
-
-         _this.originalScore = _this.matchScore || 1;
-
-         _this.originalReference = _this.reference || {};
-
-         _this.originalFields = (_this.fields || []);
-
-         _this.originalMoreFields = (_this.moreFields || []);
-
-         _this.fields = function () { return _resolvedFields || (_resolvedFields = resolve('fields')); };
-
-         _this.moreFields = function () { return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields')); };
-
-         _this.resetFields = function () { return _resolvedFields = _resolvedMoreFields = null; };
-
-         _this.tags = _this.tags || {};
-
-         _this.addTags = _this.addTags || _this.tags;
-
-         _this.removeTags = _this.removeTags || _this.addTags;
-
-         _this.geometry = (_this.geometry || []);
-
-         _this.matchGeometry = function (geom) { return _this.geometry.indexOf(geom) >= 0; };
-
-         _this.matchAllGeometry = function (geoms) { return geoms.every(_this.matchGeometry); };
-
-         _this.matchScore = function (entityTags) {
-           var tags = _this.tags;
-           var seen = {};
-           var score = 0;
-
-           // match on tags
-           for (var k in tags) {
-             seen[k] = true;
-             if (entityTags[k] === tags[k]) {
-               score += _this.originalScore;
-             } else if (tags[k] === '*' && k in entityTags) {
-               score += _this.originalScore / 2;
-             } else {
-               return -1;
-             }
-           }
-
-           // boost score for additional matches in addTags - #6802
-           var addTags = _this.addTags;
-           for (var k$1 in addTags) {
-             if (!seen[k$1] && entityTags[k$1] === addTags[k$1]) {
-               score += _this.originalScore;
-             }
-           }
-
-           return score;
-         };
-
-
-         var _textCache = {};
-         _this.t = function (scope, options) {
-           var textID = "presets.presets." + presetID + "." + scope;
-           if (_textCache[textID]) { return _textCache[textID]; }
-           return _textCache[textID] = _t(textID, options);
-         };
-
-
-         _this.name = function () {
-           if (_this.suggestion) {
-             var path = presetID.split('/');
-             path.pop();  // remove brand name
-             // NOTE: insert an en-dash, not a hypen (to avoid conflict with fr - nl names in Brussels etc)
-             return _this.originalName + ' – ' + _t('presets.presets.' + path.join('/') + '.name');
-           }
-           return _this.t('name', { 'default': _this.originalName });
-         };
-
-
-         _this.terms = function () { return _this.t('terms', { 'default': _this.originalTerms })
-           .toLowerCase().trim().split(/\s*,+\s*/); };
-
-
-         _this.isFallback = function () {
-           var tagCount = Object.keys(_this.tags).length;
-           return tagCount === 0 || (tagCount === 1 && _this.tags.hasOwnProperty('area'));
-         };
-
-
-         _this.addable = function(val) {
-           if (!arguments.length) { return _addable; }
-           _addable = val;
-           return _this;
-         };
-
-
-         _this.reference = function (geom) {
-           // Lookup documentation on Wikidata...
-           var qid = _this.tags.wikidata || _this.tags['brand:wikidata'] || _this.tags['operator:wikidata'];
-           if (qid) {
-             return { qid: qid };
-           }
-
-           // Lookup documentation on OSM Wikibase...
-           var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
-           var value = _this.originalReference.value || _this.tags[key];
-
-           if (geom === 'relation' && key === 'type') {
-             if (value in _this.tags) {
-               key = value;
-               value = _this.tags[key];
-             } else {
-               return { rtype: value };
-             }
-           }
-
-           if (value === '*') {
-             return { key: key };
-           } else {
-             return { key: key, value: value };
-           }
-         };
-
-
-         _this.unsetTags = function (tags, geometry, skipFieldDefaults) {
-           tags = utilObjectOmit(tags, Object.keys(_this.removeTags));
-
-           if (geometry && !skipFieldDefaults) {
-             _this.fields().forEach(function (field) {
-               if (field.matchGeometry(geometry) && field.key && field.default === tags[field.key]) {
-                 delete tags[field.key];
-               }
-             });
-           }
-
-           delete tags.area;
-           return tags;
-         };
-
-
-         _this.setTags = function (tags, geometry, skipFieldDefaults) {
-           var addTags = _this.addTags;
-           tags = Object.assign({}, tags);   // shallow copy
-
-           for (var k in addTags) {
-             if (addTags[k] === '*') {
-               tags[k] = 'yes';
-             } else {
-               tags[k] = addTags[k];
-             }
-           }
-
-           // Add area=yes if necessary.
-           // This is necessary if the geometry is already an area (e.g. user drew an area) AND any of:
-           // 1. chosen preset could be either an area or a line (`barrier=city_wall`)
-           // 2. chosen preset doesn't have a key in osmAreaKeys (`railway=station`)
-           if (!addTags.hasOwnProperty('area')) {
-             delete tags.area;
-             if (geometry === 'area') {
-               var needsAreaTag = true;
-               if (_this.geometry.indexOf('line') === -1) {
-                 for (var k$1 in addTags) {
-                   if (k$1 in osmAreaKeys) {
-                     needsAreaTag = false;
-                     break;
-                   }
-                 }
-               }
-               if (needsAreaTag) {
-                 tags.area = 'yes';
-               }
-             }
-           }
-
-           if (geometry && !skipFieldDefaults) {
-             _this.fields().forEach(function (field) {
-               if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field.default) {
-                 tags[field.key] = field.default;
-               }
-             });
-           }
-
-           return tags;
-         };
-
-
-         // For a preset without fields, use the fields of the parent preset.
-         // Replace {preset} placeholders with the fields of the specified presets.
-         function resolve(which) {
-           var fieldIDs = (which === 'fields' ? _this.originalFields : _this.originalMoreFields);
-           var resolved = [];
-
-           fieldIDs.forEach(function (fieldID) {
-             var match = fieldID.match(/\{(.*)\}/);
-             if (match !== null) {    // a presetID wrapped in braces {}
-               resolved = resolved.concat(inheritFields(match[1], which));
-             } else if (allFields[fieldID]) {    // a normal fieldID
-               resolved.push(allFields[fieldID]);
-             } else {
-               console.log(("Cannot resolve \"" + fieldID + "\" found in " + (_this.id) + "." + which));  // eslint-disable-line no-console
-             }
-           });
-
-           // no fields resolved, so use the parent's if possible
-           if (!resolved.length) {
-             var endIndex = _this.id.lastIndexOf('/');
-             var parentID = endIndex && _this.id.substring(0, endIndex);
-             if (parentID) {
-               resolved = inheritFields(parentID, which);
-             }
-           }
-
-           return utilArrayUniq(resolved);
-
-
-           // returns an array of fields to inherit from the given presetID, if found
-           function inheritFields(presetID, which) {
-             var parent = allPresets[presetID];
-             if (!parent) { return []; }
-
-             if (which === 'fields') {
-               return parent.fields().filter(shouldInherit);
-             } else if (which === 'moreFields') {
-               return parent.moreFields();
-             } else {
-               return [];
-             }
-           }
-
-
-           // Skip `fields` for the keys which define the preset.
-           // These are usually `typeCombo` fields like `shop=*`
-           function shouldInherit(f) {
-             if (f.key && _this.tags[f.key] !== undefined &&
-               // inherit anyway if multiple values are allowed or just a checkbox
-               f.type !== 'multiCombo' && f.type !== 'semiCombo' && f.type !== 'check'
-             ) { return false; }
-
-             return true;
-           }
-         }
-
-
-         return _this;
-       }
-
-       var _mainPresetIndex = presetIndex(); // singleton
-
-       //
-       // `presetIndex` wraps a `presetCollection`
-       // with methods for loading new data and returning defaults
-       //
-       function presetIndex() {
-         var dispatch$1 = dispatch('favoritePreset', 'recentsChange');
-         var MAXRECENTS = 30;
-
-         // seed the preset lists with geometry fallbacks
-         var POINT = presetPreset('point', { name: 'Point', tags: {}, geometry: ['point', 'vertex'], matchScore: 0.1 } );
-         var LINE = presetPreset('line', { name: 'Line', tags: {}, geometry: ['line'], matchScore: 0.1 } );
-         var AREA = presetPreset('area', { name: 'Area', tags: { area: 'yes' }, geometry: ['area'], matchScore: 0.1 } );
-         var RELATION = presetPreset('relation', { name: 'Relation', tags: {}, geometry: ['relation'], matchScore: 0.1 } );
-
-         var _this = presetCollection([POINT, LINE, AREA, RELATION]);
-         var _presets = { point: POINT, line: LINE, area: AREA, relation: RELATION };
-
-         var _defaults = {
-           point: presetCollection([POINT]),
-           vertex: presetCollection([POINT]),
-           line: presetCollection([LINE]),
-           area: presetCollection([AREA]),
-           relation: presetCollection([RELATION])
-         };
-
-         var _fields = {};
-         var _categories = {};
-         var _universal = [];
-         var _addablePresetIDs = null;   // Set of preset IDs that the user can add
-         var _recents;
-         var _favorites;
-
-         // Index of presets by (geometry, tag key).
-         var _geometryIndex = { point: {}, vertex: {}, line: {}, area: {}, relation: {} };
-
-         var _loadPromise;
-
-         _this.ensureLoaded = function () {
-           if (_loadPromise) { return _loadPromise; }
-
-           return _loadPromise = Promise.all([
-               _mainFileFetcher.get('preset_categories'),
-               _mainFileFetcher.get('preset_defaults'),
-               _mainFileFetcher.get('preset_presets'),
-               _mainFileFetcher.get('preset_fields')
-             ])
-             .then(function (vals) {
-               _this.merge({
-                 categories: vals[0],
-                 defaults: vals[1],
-                 presets: vals[2],
-                 fields: vals[3]
-               });
-               osmSetAreaKeys(_this.areaKeys());
-               osmSetPointTags(_this.pointTags());
-               osmSetVertexTags(_this.vertexTags());
-             });
-         };
-
-
-         _this.merge = function (d) {
-           // Merge Fields
-           if (d.fields) {
-             Object.keys(d.fields).forEach(function (fieldID) {
-               var f = d.fields[fieldID];
-               if (f) {   // add or replace
-                 _fields[fieldID] = presetField(fieldID, f);
-               } else {   // remove
-                 delete _fields[fieldID];
-               }
-             });
-           }
-
-           // Merge Presets
-           if (d.presets) {
-             Object.keys(d.presets).forEach(function (presetID) {
-               var p = d.presets[presetID];
-               if (p) {   // add or replace
-                 var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
-                 _presets[presetID] = presetPreset(presetID, p, isAddable, _fields, _presets);
-               } else {   // remove (but not if it's a fallback)
-                 var existing = _presets[presetID];
-                 if (existing && !existing.isFallback()) {
-                   delete _presets[presetID];
-                 }
-               }
-             });
-           }
-
-           // Need to rebuild _this.collection before loading categories
-           _this.collection = Object.values(_presets).concat(Object.values(_categories));
-
-           // Merge Categories
-           if (d.categories) {
-             Object.keys(d.categories).forEach(function (categoryID) {
-               var c = d.categories[categoryID];
-               if (c) {   // add or replace
-                 _categories[categoryID] = presetCategory(categoryID, c, _this);
-               } else {   // remove
-                 delete _categories[categoryID];
-               }
-             });
-           }
-
-           // Rebuild _this.collection after loading categories
-           _this.collection = Object.values(_presets).concat(Object.values(_categories));
-
-           // Merge Defaults
-           if (d.defaults) {
-             Object.keys(d.defaults).forEach(function (geometry) {
-               var def = d.defaults[geometry];
-               if (Array.isArray(def)) {   // add or replace
-                 _defaults[geometry] = presetCollection(
-                   def.map(function (id) { return _presets[id] || _categories[id]; }).filter(Boolean)
-                 );
-               } else {   // remove
-                 delete _defaults[geometry];
-               }
-             });
-           }
-
-           // Rebuild universal fields array
-           _universal = Object.values(_fields).filter(function (field) { return field.universal; });
-
-           // Reset all the preset fields - they'll need to be resolved again
-           Object.values(_presets).forEach(function (preset) { return preset.resetFields(); });
-
-           // Rebuild geometry index
-           _geometryIndex = { point: {}, vertex: {}, line: {}, area: {}, relation: {} };
-           _this.collection.forEach(function (preset) {
-             (preset.geometry || []).forEach(function (geometry) {
-               var g = _geometryIndex[geometry];
-               for (var key in preset.tags) {
-                 (g[key] = g[key] || []).push(preset);
-               }
-             });
-           });
-
-           return _this;
-         };
-
-
-         _this.match = function (entity, resolver) {
-           return resolver.transient(entity, 'presetMatch', function () {
-             var geometry = entity.geometry(resolver);
-             // Treat entities on addr:interpolation lines as points, not vertices - #3241
-             if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
-               geometry = 'point';
-             }
-             return _this.matchTags(entity.tags, geometry);
-           });
-         };
-
-
-         _this.matchTags = function (tags, geometry) {
-           var geometryMatches = _geometryIndex[geometry];
-           var address;
-           var best = -1;
-           var match;
-
-           for (var k in tags) {
-             // If any part of an address is present, allow fallback to "Address" preset - #4353
-             if (/^addr:/.test(k) && geometryMatches['addr:*']) {
-               address = geometryMatches['addr:*'][0];
-             }
-
-             var keyMatches = geometryMatches[k];
-             if (!keyMatches) { continue; }
-
-             for (var i = 0; i < keyMatches.length; i++) {
-               var score = keyMatches[i].matchScore(tags);
-               if (score > best) {
-                 best = score;
-                 match = keyMatches[i];
-               }
-             }
-           }
-
-           if (address && (!match || match.isFallback())) {
-             match = address;
-           }
-           return match || _this.fallback(geometry);
-         };
-
-
-         _this.allowsVertex = function (entity, resolver) {
-           if (entity.type !== 'node') { return false; }
-           if (Object.keys(entity.tags).length === 0) { return true; }
-
-           return resolver.transient(entity, 'vertexMatch', function () {
-             // address lines allow vertices to act as standalone points
-             if (entity.isOnAddressLine(resolver)) { return true; }
-
-             var geometries = osmNodeGeometriesForTags(entity.tags);
-             if (geometries.vertex) { return true; }
-             if (geometries.point) { return false; }
-             // allow vertices for unspecified points
-             return true;
-           });
-         };
-
-
-         // Because of the open nature of tagging, iD will never have a complete
-         // list of tags used in OSM, so we want it to have logic like "assume
-         // that a closed way with an amenity tag is an area, unless the amenity
-         // is one of these specific types". This function computes a structure
-         // that allows testing of such conditions, based on the presets designated
-         // as as supporting (or not supporting) the area geometry.
-         //
-         // The returned object L is a keeplist/discardlist of tags. A closed way
-         // with a tag (k, v) is considered to be an area if `k in L && !(v in L[k])`
-         // (see `Way#isArea()`). In other words, the keys of L form the keeplist,
-         // and the subkeys form the discardlist.
-         _this.areaKeys = function () {
-           // The ignore list is for keys that imply lines. (We always add `area=yes` for exceptions)
-           var ignore = ['barrier', 'highway', 'footway', 'railway', 'junction', 'type'];
-           var areaKeys = {};
-
-           // ignore name-suggestion-index and deprecated presets
-           var presets = _this.collection.filter(function (p) { return !p.suggestion && !p.replacement; });
-
-           // keeplist
-           presets.forEach(function (p) {
-             var key;
-             for (key in p.tags) { break; }  // pick the first tag
-             if (!key) { return; }
-             if (ignore.indexOf(key) !== -1) { return; }
-
-             if (p.geometry.indexOf('area') !== -1) {    // probably an area..
-               areaKeys[key] = areaKeys[key] || {};
-             }
-           });
-
-           // discardlist
-           presets.forEach(function (p) {
-             var key;
-             for (key in p.addTags) {
-               // examine all addTags to get a better sense of what can be tagged on lines - #6800
-               var value = p.addTags[key];
-               if (key in areaKeys &&                    // probably an area...
-                 p.geometry.indexOf('line') !== -1 &&    // but sometimes a line
-                 value !== '*') {
-                 areaKeys[key][value] = true;
-               }
-             }
-           });
-
-           return areaKeys;
-         };
-
-
-         _this.pointTags = function () {
-           return _this.collection.reduce(function (pointTags, d) {
-             // ignore name-suggestion-index, deprecated, and generic presets
-             if (d.suggestion || d.replacement || d.searchable === false) { return pointTags; }
-
-             // only care about the primary tag
-             var key;
-             for (key in d.tags) { break; }  // pick the first tag
-             if (!key) { return pointTags; }
-
-             // if this can be a point
-             if (d.geometry.indexOf('point') !== -1) {
-               pointTags[key] = pointTags[key] || {};
-               pointTags[key][d.tags[key]] = true;
-             }
-             return pointTags;
-           }, {});
-         };
-
-
-         _this.vertexTags = function () {
-           return _this.collection.reduce(function (vertexTags, d) {
-             // ignore name-suggestion-index, deprecated, and generic presets
-             if (d.suggestion || d.replacement || d.searchable === false) { return vertexTags; }
-
-             // only care about the primary tag
-             var key;
-             for (key in d.tags) { break; }   // pick the first tag
-             if (!key) { return vertexTags; }
-
-             // if this can be a vertex
-             if (d.geometry.indexOf('vertex') !== -1) {
-               vertexTags[key] = vertexTags[key] || {};
-               vertexTags[key][d.tags[key]] = true;
-             }
-             return vertexTags;
-           }, {});
-         };
-
-
-         _this.field = function (id) { return _fields[id]; };
-
-         _this.universal = function () { return _universal; };
-
-
-         _this.defaults = function (geometry, n, startWithRecents) {
-           var recents = [];
-           if (startWithRecents) {
-             recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
-           }
-           var defaults;
-           if (_addablePresetIDs) {
-             defaults = Array.from(_addablePresetIDs).map(function(id) {
-               var preset = _this.item(id);
-               if (preset && preset.matchGeometry(geometry)) { return preset; }
-               return null;
-             }).filter(Boolean);
-           } else {
-             defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
-           }
-
-           return presetCollection(
-             utilArrayUniq(recents.concat(defaults)).slice(0, n - 1)
-           );
-         };
-
-         // pass a Set of addable preset ids
-         _this.addablePresetIDs = function(val) {
-           if (!arguments.length) { return _addablePresetIDs; }
-
-           // accept and convert arrays
-           if (Array.isArray(val)) { val = new Set(val); }
-
-           _addablePresetIDs = val;
-           if (_addablePresetIDs) {   // reset all presets
-             _this.collection.forEach(function (p) {
-               // categories aren't addable
-               if (p.addable) { p.addable(_addablePresetIDs.has(p.id)); }
-             });
-           } else {
-             _this.collection.forEach(function (p) {
-               if (p.addable) { p.addable(true); }
-             });
-           }
-
-           return _this;
-         };
-
-
-         _this.recent = function () {
-           return presetCollection(
-             utilArrayUniq(_this.getRecents().map(function (d) { return d.preset; }))
-           );
-         };
-
-
-         function RibbonItem(preset, source) {
-           var item = {};
-           item.preset = preset;
-           item.source = source;
-
-           item.isFavorite = function () { return item.source === 'favorite'; };
-           item.isRecent = function () { return item.source === 'recent'; };
-           item.matches = function (preset) { return item.preset.id === preset.id; };
-           item.minified = function () { return ({ pID: item.preset.id }); };
-
-           return item;
-         }
-
-
-         function ribbonItemForMinified(d, source) {
-           if (d && d.pID) {
-             var preset = _this.item(d.pID);
-             if (!preset) { return null; }
-             return RibbonItem(preset, source);
-           }
-           return null;
-         }
-
-
-         _this.getGenericRibbonItems = function () {
-           return ['point', 'line', 'area'].map(function (id) { return RibbonItem(_this.item(id), 'generic'); });
-         };
-
-
-         _this.getAddable = function () {
-             if (!_addablePresetIDs) { return []; }
-
-             return _addablePresetIDs.map(function (id) {
-               var preset = _this.item(id);
-               if (preset) {
-                 return RibbonItem(preset, 'addable');
-               }
-             }).filter(Boolean);
-         };
-
-
-         function setRecents(items) {
-           _recents = items;
-           var minifiedItems = items.map(function (d) { return d.minified(); });
-           corePreferences('preset_recents', JSON.stringify(minifiedItems));
-           dispatch$1.call('recentsChange');
-         }
-
-
-         _this.getRecents = function () {
-           if (!_recents) {
-             // fetch from local storage
-             _recents = (JSON.parse(corePreferences('preset_recents')) || [])
-               .reduce(function (acc, d) {
-                 var item = ribbonItemForMinified(d, 'recent');
-                 if (item && item.preset.addable()) { acc.push(item); }
-                 return acc;
-               }, []);
-           }
-           return _recents;
-         };
-
-
-         _this.addRecent = function (preset, besidePreset, after) {
-           var recents = _this.getRecents();
-
-           var beforeItem = _this.recentMatching(besidePreset);
-           var toIndex = recents.indexOf(beforeItem);
-           if (after) { toIndex += 1; }
-
-           var newItem = RibbonItem(preset, 'recent');
-           recents.splice(toIndex, 0, newItem);
-           setRecents(recents);
-         };
-
-
-         _this.removeRecent = function (preset) {
-           var item = _this.recentMatching(preset);
-           if (item) {
-             var items = _this.getRecents();
-             items.splice(items.indexOf(item), 1);
-             setRecents(items);
-           }
-         };
-
-
-         _this.recentMatching = function (preset) {
-           var items = _this.getRecents();
-           for (var i in items) {
-             if (items[i].matches(preset)) {
-               return items[i];
-             }
-           }
-           return null;
-         };
-
-
-         _this.moveItem = function (items, fromIndex, toIndex) {
-           if (fromIndex === toIndex ||
-             fromIndex < 0 || toIndex < 0 ||
-             fromIndex >= items.length || toIndex >= items.length
-           ) { return null; }
-
-           items.splice(toIndex, 0, items.splice(fromIndex, 1)[0]);
-           return items;
-         };
-
-
-         _this.moveRecent = function (item, beforeItem) {
-           var recents = _this.getRecents();
-           var fromIndex = recents.indexOf(item);
-           var toIndex = recents.indexOf(beforeItem);
-           var items = _this.moveItem(recents, fromIndex, toIndex);
-           if (items) { setRecents(items); }
-         };
-
-
-         _this.setMostRecent = function (preset) {
-           if (preset.searchable === false) { return; }
-
-           var items = _this.getRecents();
-           var item = _this.recentMatching(preset);
-           if (item) {
-             items.splice(items.indexOf(item), 1);
-           } else {
-             item = RibbonItem(preset, 'recent');
-           }
-
-           // remove the last recent (first in, first out)
-           while (items.length >= MAXRECENTS) {
-             items.pop();
-           }
-
-           // prepend array
-           items.unshift(item);
-           setRecents(items);
-         };
-
-         function setFavorites(items) {
-           _favorites = items;
-           var minifiedItems = items.map(function (d) { return d.minified(); });
-           corePreferences('preset_favorites', JSON.stringify(minifiedItems));
-
-           // call update
-           dispatch$1.call('favoritePreset');
-         }
-
-         _this.addFavorite = function (preset, besidePreset, after) {
-             var favorites = _this.getFavorites();
-
-             var beforeItem = _this.favoriteMatching(besidePreset);
-             var toIndex = favorites.indexOf(beforeItem);
-             if (after) { toIndex += 1; }
-
-             var newItem = RibbonItem(preset, 'favorite');
-             favorites.splice(toIndex, 0, newItem);
-             setFavorites(favorites);
-         };
-
-         _this.toggleFavorite = function (preset) {
-           var favs = _this.getFavorites();
-           var favorite = _this.favoriteMatching(preset);
-           if (favorite) {
-             favs.splice(favs.indexOf(favorite), 1);
-           } else {
-             // only allow 10 favorites
-             if (favs.length === 10) {
-                 // remove the last favorite (last in, first out)
-                 favs.pop();
-             }
-             // append array
-             favs.push(RibbonItem(preset, 'favorite'));
-           }
-           setFavorites(favs);
-         };
-
-
-         _this.removeFavorite = function (preset) {
-           var item = _this.favoriteMatching(preset);
-           if (item) {
-             var items = _this.getFavorites();
-             items.splice(items.indexOf(item), 1);
-             setFavorites(items);
-           }
-         };
-
-
-         _this.getFavorites = function () {
-           if (!_favorites) {
-
-             // fetch from local storage
-             var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
-
-             if (!rawFavorites) {
-               rawFavorites = [];
-               corePreferences('preset_favorites', JSON.stringify(rawFavorites));
-             }
-
-             _favorites = rawFavorites.reduce(function (output, d) {
-               var item = ribbonItemForMinified(d, 'favorite');
-               if (item && item.preset.addable()) { output.push(item); }
-               return output;
-             }, []);
-           }
-           return _favorites;
-         };
-
-
-         _this.favoriteMatching = function (preset) {
-           var favs = _this.getFavorites();
-           for (var index in favs) {
-             if (favs[index].matches(preset)) {
-               return favs[index];
-             }
-           }
-           return null;
-         };
-
-
-         return utilRebind(_this, dispatch$1, 'on');
-       }
-
-       function utilTagText(entity) {
-           var obj = (entity && entity.tags) || {};
-           return Object.keys(obj)
-               .map(function(k) { return k + '=' + obj[k]; })
-               .join(', ');
-       }
-
-
-       function utilTotalExtent(array, graph) {
-           var extent = geoExtent();
-           var val, entity;
-           for (var i = 0; i < array.length; i++) {
-               val = array[i];
-               entity = typeof val === 'string' ? graph.hasEntity(val) : val;
-               if (entity) {
-                   extent._extend(entity.extent(graph));
-               }
-           }
-           return extent;
-       }
-
-
-       function utilTagDiff(oldTags, newTags) {
-           var tagDiff = [];
-           var keys = utilArrayUnion(Object.keys(oldTags), Object.keys(newTags)).sort();
-           keys.forEach(function(k) {
-               var oldVal = oldTags[k];
-               var newVal = newTags[k];
-
-               if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
-                   tagDiff.push({
-                       type: '-',
-                       key: k,
-                       oldVal: oldVal,
-                       newVal: newVal,
-                       display: '- ' + k + '=' + oldVal
-                   });
-               }
-               if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
-                   tagDiff.push({
-                       type: '+',
-                       key: k,
-                       oldVal: oldVal,
-                       newVal: newVal,
-                       display: '+ ' + k + '=' + newVal
-                   });
-               }
-           });
-           return tagDiff;
-       }
-
-
-       function utilEntitySelector(ids) {
-           return ids.length ? '.' + ids.join(',.') : 'nothing';
-       }
-
-
-       // returns an selector to select entity ids for:
-       //  - entityIDs passed in
-       //  - shallow descendant entityIDs for any of those entities that are relations
-       function utilEntityOrMemberSelector(ids, graph) {
-           var seen = new Set(ids);
-           ids.forEach(collectShallowDescendants);
-           return utilEntitySelector(Array.from(seen));
-
-           function collectShallowDescendants(id) {
-               var entity = graph.hasEntity(id);
-               if (!entity || entity.type !== 'relation') { return; }
-
-               entity.members
-                   .map(function(member) { return member.id; })
-                   .forEach(function(id) { seen.add(id); });
-           }
-       }
-
-
-       // returns an selector to select entity ids for:
-       //  - entityIDs passed in
-       //  - deep descendant entityIDs for any of those entities that are relations
-       function utilEntityOrDeepMemberSelector(ids, graph) {
-           return utilEntitySelector(utilEntityAndDeepMemberIDs(ids, graph));
-       }
-
-
-       // returns an selector to select entity ids for:
-       //  - entityIDs passed in
-       //  - deep descendant entityIDs for any of those entities that are relations
-       function utilEntityAndDeepMemberIDs(ids, graph) {
-           var seen = new Set();
-           ids.forEach(collectDeepDescendants);
-           return Array.from(seen);
-
-           function collectDeepDescendants(id) {
-               if (seen.has(id)) { return; }
-               seen.add(id);
-
-               var entity = graph.hasEntity(id);
-               if (!entity || entity.type !== 'relation') { return; }
-
-               entity.members
-                   .map(function(member) { return member.id; })
-                   .forEach(collectDeepDescendants);   // recurse
-           }
-       }
-
-       // returns an selector to select entity ids for:
-       //  - deep descendant entityIDs for any of those entities that are relations
-       function utilDeepMemberSelector(ids, graph, skipMultipolgonMembers) {
-           var idsSet = new Set(ids);
-           var seen = new Set();
-           var returners = new Set();
-           ids.forEach(collectDeepDescendants);
-           return utilEntitySelector(Array.from(returners));
-
-           function collectDeepDescendants(id) {
-               if (seen.has(id)) { return; }
-               seen.add(id);
-
-               if (!idsSet.has(id)) {
-                   returners.add(id);
-               }
-
-               var entity = graph.hasEntity(id);
-               if (!entity || entity.type !== 'relation') { return; }
-               if (skipMultipolgonMembers && entity.isMultipolygon()) { return; }
-               entity.members
-                   .map(function(member) { return member.id; })
-                   .forEach(collectDeepDescendants);   // recurse
-           }
-       }
-
-
-       // Adds or removes highlight styling for the specified entities
-       function utilHighlightEntities(ids, highlighted, context) {
-           context.surface()
-               .selectAll(utilEntityOrDeepMemberSelector(ids, context.graph()))
-               .classed('highlighted', highlighted);
-       }
-
-
-       // returns an Array that is the union of:
-       //  - nodes for any nodeIDs passed in
-       //  - child nodes of any wayIDs passed in
-       //  - descendant member and child nodes of relationIDs passed in
-       function utilGetAllNodes(ids, graph) {
-           var seen = new Set();
-           var nodes = new Set();
-
-           ids.forEach(collectNodes);
-           return Array.from(nodes);
-
-           function collectNodes(id) {
-               if (seen.has(id)) { return; }
-               seen.add(id);
-
-               var entity = graph.hasEntity(id);
-               if (!entity) { return; }
-
-               if (entity.type === 'node') {
-                   nodes.add(entity);
-               } else if (entity.type === 'way') {
-                   entity.nodes.forEach(collectNodes);
-               } else {
-                   entity.members
-                       .map(function(member) { return member.id; })
-                       .forEach(collectNodes);   // recurse
-               }
-           }
-       }
-
-
-       function utilDisplayName(entity) {
-           var localizedNameKey = 'name:' + _mainLocalizer.languageCode().toLowerCase();
-           var name = entity.tags[localizedNameKey] || entity.tags.name || '';
-           var network = entity.tags.cycle_network || entity.tags.network;
-
-           if (!name && entity.tags.ref) {
-               name = entity.tags.ref;
-               if (network) {
-                   name = network + ' ' + name;
-               }
-           }
-
-           return name;
-       }
-
-
-       function utilDisplayNameForPath(entity) {
-           var name = utilDisplayName(entity);
-           var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
-
-           if (!isFirefox && name && rtlRegex.test(name)) {
-               name = fixRTLTextForSvg(name);
-           }
-
-           return name;
-       }
-
-
-       function utilDisplayType(id) {
-           return {
-               n: _t('inspector.node'),
-               w: _t('inspector.way'),
-               r: _t('inspector.relation')
-           }[id.charAt(0)];
-       }
-
-
-       function utilDisplayLabel(entity, graph) {
-           var displayName = utilDisplayName(entity);
-           if (displayName) {
-               // use the display name if there is one
-               return displayName;
-           }
-           var preset = _mainPresetIndex.match(entity, graph);
-           if (preset && preset.name()) {
-               // use the preset name if there is a match
-               return preset.name();
-           }
-           // fallback to the display type (node/way/relation)
-           return utilDisplayType(entity.id);
-       }
-
-
-       function utilEntityRoot(entityType) {
-           return {
-               node: 'n',
-               way: 'w',
-               relation: 'r'
-           }[entityType];
-       }
-
-
-       // Returns a single object containing the tags of all the given entities.
-       // Example:
-       // {
-       //   highway: 'service',
-       //   service: 'parking_aisle'
-       // }
-       //           +
-       // {
-       //   highway: 'service',
-       //   service: 'driveway',
-       //   width: '3'
-       // }
-       //           =
-       // {
-       //   highway: 'service',
-       //   service: [ 'driveway', 'parking_aisle' ],
-       //   width: [ '3', undefined ]
-       // }
-       function utilCombinedTags(entityIDs, graph) {
-
-           var tags = {};
-           var tagCounts = {};
-           var allKeys = new Set();
-
-           var entities = entityIDs.map(function(entityID) {
-               return graph.hasEntity(entityID);
-           }).filter(Boolean);
-
-           // gather the aggregate keys
-           entities.forEach(function(entity) {
-               var keys = Object.keys(entity.tags).filter(Boolean);
-               keys.forEach(function(key) {
-                   allKeys.add(key);
-               });
-           });
-
-           entities.forEach(function(entity) {
-
-               allKeys.forEach(function(key) {
-
-                   var value = entity.tags[key]; // purposely allow `undefined`
-
-                   if (!tags.hasOwnProperty(key)) {
-                       // first value, set as raw
-                       tags[key] = value;
-                   } else {
-                       if (!Array.isArray(tags[key])) {
-                           if (tags[key] !== value) {
-                               // first alternate value, replace single value with array
-                               tags[key] = [tags[key], value];
-                           }
-                       } else { // type is array
-                           if (tags[key].indexOf(value) === -1) {
-                               // subsequent alternate value, add to array
-                               tags[key].push(value);
-                           }
-                       }
-                   }
-
-                   var tagHash = key + '=' + value;
-                   if (!tagCounts[tagHash]) { tagCounts[tagHash] = 0; }
-                   tagCounts[tagHash] += 1;
-               });
-           });
-
-           for (var key in tags) {
-               if (!Array.isArray(tags[key])) { continue; }
-
-               // sort values by frequency then alphabetically
-               tags[key] = tags[key].sort(function(val1, val2) {
-                   var key = key; // capture
-                   var count2 = tagCounts[key + '=' + val2];
-                   var count1 = tagCounts[key + '=' + val1];
-                   if (count2 !== count1) {
-                       return count2 - count1;
-                   }
-                   if (val2 && val1) {
-                       return val1.localeCompare(val2);
-                   }
-                   return val1 ? 1 : -1;
-               });
-           }
-
-           return tags;
-       }
-
-
-       function utilStringQs(str) {
-           var i = 0;  // advance past any leading '?' or '#' characters
-           while (i < str.length && (str[i] === '?' || str[i] === '#')) { i++; }
-           str = str.slice(i);
-
-           return str.split('&').reduce(function(obj, pair){
-               var parts = pair.split('=');
-               if (parts.length === 2) {
-                   obj[parts[0]] = (null === parts[1]) ? '' : decodeURIComponent(parts[1]);
-               }
-               return obj;
-           }, {});
-       }
-
-
-       function utilQsString(obj, noencode) {
-           // encode everything except special characters used in certain hash parameters:
-           // "/" in map states, ":", ",", {" and "}" in background
-           function softEncode(s) {
-               return encodeURIComponent(s).replace(/(%2F|%3A|%2C|%7B|%7D)/g, decodeURIComponent);
-           }
-
-           return Object.keys(obj).sort().map(function(key) {
-               return encodeURIComponent(key) + '=' + (
-                   noencode ? softEncode(obj[key]) : encodeURIComponent(obj[key]));
-           }).join('&');
-       }
-
-
-       function utilPrefixDOMProperty(property) {
-           var prefixes = ['webkit', 'ms', 'moz', 'o'];
-           var i = -1;
-           var n = prefixes.length;
-           var s = document.body;
-
-           if (property in s)
-               { return property; }
-
-           property = property.substr(0, 1).toUpperCase() + property.substr(1);
-
-           while (++i < n) {
-               if (prefixes[i] + property in s) {
-                   return prefixes[i] + property;
-               }
-           }
-
-           return false;
-       }
-
-
-       function utilPrefixCSSProperty(property) {
-           var prefixes = ['webkit', 'ms', 'Moz', 'O'];
-           var i = -1;
-           var n = prefixes.length;
-           var s = document.body.style;
-
-           if (property.toLowerCase() in s) {
-               return property.toLowerCase();
-           }
-
-           while (++i < n) {
-               if (prefixes[i] + property in s) {
-                   return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
-               }
-           }
-
-           return false;
-       }
-
-
-       var transformProperty;
-       function utilSetTransform(el, x, y, scale) {
-           var prop = transformProperty = transformProperty || utilPrefixCSSProperty('Transform');
-           var translate = utilDetect().opera ? 'translate('   + x + 'px,' + y + 'px)'
-               : 'translate3d(' + x + 'px,' + y + 'px,0)';
-           return el.style(prop, translate + (scale ? ' scale(' + scale + ')' : ''));
-       }
-
-
-       // Calculates Levenshtein distance between two strings
-       // see:  https://en.wikipedia.org/wiki/Levenshtein_distance
-       // first converts the strings to lowercase and replaces diacritic marks with ascii equivalents.
-       function utilEditDistance(a, b) {
-           a = remove$1(a.toLowerCase());
-           b = remove$1(b.toLowerCase());
-           if (a.length === 0) { return b.length; }
-           if (b.length === 0) { return a.length; }
-           var matrix = [];
-           for (var i = 0; i <= b.length; i++) { matrix[i] = [i]; }
-           for (var j = 0; j <= a.length; j++) { matrix[0][j] = j; }
-           for (i = 1; i <= b.length; i++) {
-               for (j = 1; j <= a.length; j++) {
-                   if (b.charAt(i-1) === a.charAt(j-1)) {
-                       matrix[i][j] = matrix[i-1][j-1];
-                   } else {
-                       matrix[i][j] = Math.min(matrix[i-1][j-1] + 1, // substitution
-                           Math.min(matrix[i][j-1] + 1, // insertion
-                           matrix[i-1][j] + 1)); // deletion
-                   }
-               }
-           }
-           return matrix[b.length][a.length];
-       }
-
-
-       // a d3.mouse-alike which
-       // 1. Only works on HTML elements, not SVG
-       // 2. Does not cause style recalculation
-       function utilFastMouse(container) {
-           var rect = container.getBoundingClientRect();
-           var rectLeft = rect.left;
-           var rectTop = rect.top;
-           var clientLeft = +container.clientLeft;
-           var clientTop = +container.clientTop;
-           return function(e) {
-               return [
-                   e.clientX - rectLeft - clientLeft,
-                   e.clientY - rectTop - clientTop];
-           };
-       }
-
-
-       function utilAsyncMap(inputs, func, callback) {
-           var remaining = inputs.length;
-           var results = [];
-           var errors = [];
-
-           inputs.forEach(function(d, i) {
-               func(d, function done(err, data) {
-                   errors[i] = err;
-                   results[i] = data;
-                   remaining--;
-                   if (!remaining) { callback(errors, results); }
-               });
-           });
-       }
-
-
-       // wraps an index to an interval [0..length-1]
-       function utilWrap(index, length) {
-           if (index < 0) {
-               index += Math.ceil(-index/length)*length;
-           }
-           return index % length;
-       }
-
-
-       /**
-        * a replacement for functor
-        *
-        * @param {*} value any value
-        * @returns {Function} a function that returns that value or the value if it's a function
-        */
-       function utilFunctor(value) {
-           if (typeof value === 'function') { return value; }
-           return function() {
-               return value;
-           };
-       }
-
-
-       function utilNoAuto(selection) {
-           var isText = (selection.size() && selection.node().tagName.toLowerCase() === 'textarea');
-
-           return selection
-               // assign 'new-password' even for non-password fields to prevent browsers (Chrome) ignoring 'off'
-               .attr('autocomplete', 'new-password')
-               .attr('autocorrect', 'off')
-               .attr('autocapitalize', 'off')
-               .attr('spellcheck', isText ? 'true' : 'false');
-       }
-
-
-       // https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript
-       // https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
-       function utilHashcode(str) {
-           var hash = 0;
-           if (str.length === 0) {
-               return hash;
-           }
-           for (var i = 0; i < str.length; i++) {
-               var char = str.charCodeAt(i);
-               hash = ((hash << 5) - hash) + char;
-               hash = hash & hash; // Convert to 32bit integer
-           }
-           return hash;
-       }
-
-       // Returns version of `str` with all runs of special characters replaced by `_`;
-       // suitable for HTML ids, classes, selectors, etc.
-       function utilSafeClassName(str) {
-           return str.toLowerCase().replace(/[^a-z0-9]+/g, '_');
-       }
-
-       // Returns string based on `val` that is highly unlikely to collide with an id
-       // used previously or that's present elsewhere in the document. Useful for preventing
-       // browser-provided autofills or when embedding iD on pages with unknown elements.
-       function utilUniqueDomId(val) {
-           return 'ideditor-' + utilSafeClassName(val.toString()) + '-' + new Date().getTime().toString();
-       }
-
-       // Returns the length of `str` in unicode characters. This can be less than
-       // `String.length()` since a single unicode character can be composed of multiple
-       // JavaScript UTF-16 code units.
-       function utilUnicodeCharsCount(str) {
-           // Native ES2015 implementations of `Array.from` split strings into unicode characters
-           return Array.from(str).length;
-       }
-
-       // Returns a new string representing `str` cut from its start to `limit` length
-       // in unicode characters. Note that this runs the risk of splitting graphemes.
-       function utilUnicodeCharsTruncated(str, limit) {
-           return Array.from(str).slice(0, limit).join('');
-       }
-
-       function osmEntity(attrs) {
-           // For prototypal inheritance.
-           if (this instanceof osmEntity) { return; }
-
-           // Create the appropriate subtype.
-           if (attrs && attrs.type) {
-               return osmEntity[attrs.type].apply(this, arguments);
-           } else if (attrs && attrs.id) {
-               return osmEntity[osmEntity.id.type(attrs.id)].apply(this, arguments);
-           }
-
-           // Initialize a generic Entity (used only in tests).
-           return (new osmEntity()).initialize(arguments);
-       }
-
-
-       osmEntity.id = function(type) {
-           return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
-       };
-
-
-       osmEntity.id.next = {
-           changeset: -1, node: -1, way: -1, relation: -1
-       };
-
-
-       osmEntity.id.fromOSM = function(type, id) {
-           return type[0] + id;
-       };
-
-
-       osmEntity.id.toOSM = function(id) {
-           return id.slice(1);
-       };
-
-
-       osmEntity.id.type = function(id) {
-           return { 'c': 'changeset', 'n': 'node', 'w': 'way', 'r': 'relation' }[id[0]];
-       };
-
-
-       // A function suitable for use as the second argument to d3.selection#data().
-       osmEntity.key = function(entity) {
-           return entity.id + 'v' + (entity.v || 0);
-       };
-
-       var _deprecatedTagValuesByKey;
-
-       osmEntity.deprecatedTagValuesByKey = function(dataDeprecated) {
-           if (!_deprecatedTagValuesByKey) {
-               _deprecatedTagValuesByKey = {};
-               dataDeprecated.forEach(function(d) {
-                   var oldKeys = Object.keys(d.old);
-                   if (oldKeys.length === 1) {
-                       var oldKey = oldKeys[0];
-                       var oldValue = d.old[oldKey];
-                       if (oldValue !== '*') {
-                           if (!_deprecatedTagValuesByKey[oldKey]) {
-                               _deprecatedTagValuesByKey[oldKey] = [oldValue];
-                           } else {
-                               _deprecatedTagValuesByKey[oldKey].push(oldValue);
-                           }
-                       }
-                   }
-               });
-           }
-           return _deprecatedTagValuesByKey;
-       };
-
-
-       osmEntity.prototype = {
-
-           tags: {},
-
-
-           initialize: function(sources) {
-               for (var i = 0; i < sources.length; ++i) {
-                   var source = sources[i];
-                   for (var prop in source) {
-                       if (Object.prototype.hasOwnProperty.call(source, prop)) {
-                           if (source[prop] === undefined) {
-                               delete this[prop];
-                           } else {
-                               this[prop] = source[prop];
-                           }
-                       }
-                   }
-               }
-
-               if (!this.id && this.type) {
-                   this.id = osmEntity.id(this.type);
-               }
-               if (!this.hasOwnProperty('visible')) {
-                   this.visible = true;
-               }
-
-               return this;
-           },
-
-
-           copy: function(resolver, copies) {
-               if (copies[this.id])
-                   { return copies[this.id]; }
-
-               var copy = osmEntity(this, { id: undefined, user: undefined, version: undefined });
-               copies[this.id] = copy;
-
-               return copy;
-           },
-
-
-           osmId: function() {
-               return osmEntity.id.toOSM(this.id);
-           },
-
-
-           isNew: function() {
-               return this.osmId() < 0;
-           },
-
-
-           update: function(attrs) {
-               return osmEntity(this, attrs, { v: 1 + (this.v || 0) });
-           },
-
-
-           mergeTags: function(tags) {
-               var merged = Object.assign({}, this.tags);   // shallow copy
-               var changed = false;
-               for (var k in tags) {
-                   var t1 = merged[k];
-                   var t2 = tags[k];
-                   if (!t1) {
-                       changed = true;
-                       merged[k] = t2;
-                   } else if (t1 !== t2) {
-                       changed = true;
-                       merged[k] = utilUnicodeCharsTruncated(
-                           utilArrayUnion(t1.split(/;\s*/), t2.split(/;\s*/)).join(';'),
-                           255 // avoid exceeding character limit; see also services/osm.js -> maxCharsForTagValue()
-                       );
-                   }
-               }
-               return changed ? this.update({ tags: merged }) : this;
-           },
-
-
-           intersects: function(extent, resolver) {
-               return this.extent(resolver).intersects(extent);
-           },
-
-
-           hasNonGeometryTags: function() {
-               return Object.keys(this.tags).some(function(k) { return k !== 'area'; });
-           },
-
-           hasParentRelations: function(resolver) {
-               return resolver.parentRelations(this).length > 0;
-           },
-
-           hasInterestingTags: function() {
-               return Object.keys(this.tags).some(osmIsInterestingTag);
-           },
-
-           hasWikidata: function() {
-               return !!this.tags.wikidata || !!this.tags['brand:wikidata'];
-           },
-
-           isHighwayIntersection: function() {
-               return false;
-           },
-
-           isDegenerate: function() {
-               return true;
-           },
-
-           deprecatedTags: function(dataDeprecated) {
-               var tags = this.tags;
-
-               // if there are no tags, none can be deprecated
-               if (Object.keys(tags).length === 0) { return []; }
-
-               var deprecated = [];
-               dataDeprecated.forEach(function(d) {
-                   var oldKeys = Object.keys(d.old);
-                   var matchesDeprecatedTags = oldKeys.every(function(oldKey) {
-                       if (!tags[oldKey]) { return false; }
-                       if (d.old[oldKey] === '*') { return true; }
-
-                       var vals = tags[oldKey].split(';').filter(Boolean);
-                       if (vals.length === 0) {
-                           return false;
-                       } else if (vals.length > 1) {
-                           return vals.indexOf(d.old[oldKey]) !== -1;
-                       } else {
-                           if (tags[oldKey] === d.old[oldKey]) {
-                               if (d.replace && d.old[oldKey] === d.replace[oldKey]) {
-                                   var replaceKeys = Object.keys(d.replace);
-                                   return !replaceKeys.every(function(replaceKey) {
-                                       return tags[replaceKey] === d.replace[replaceKey];
-                                   });
-                               } else {
-                                   return true;
-                               }
-                           }
-                       }
-                       return false;
-                   });
-                   if (matchesDeprecatedTags) {
-                       deprecated.push(d);
-                   }
-               });
-
-               return deprecated;
-           }
-       };
-
-       function osmLanes(entity) {
-           if (entity.type !== 'way') { return null; }
-           if (!entity.tags.highway) { return null; }
-
-           var tags = entity.tags;
-           var isOneWay = entity.isOneWay();
-           var laneCount = getLaneCount(tags, isOneWay);
-           var maxspeed = parseMaxspeed(tags);
-
-           var laneDirections = parseLaneDirections(tags, isOneWay, laneCount);
-           var forward = laneDirections.forward;
-           var backward = laneDirections.backward;
-           var bothways = laneDirections.bothways;
-
-           // parse the piped string 'x|y|z' format
-           var turnLanes = {};
-           turnLanes.unspecified = parseTurnLanes(tags['turn:lanes']);
-           turnLanes.forward = parseTurnLanes(tags['turn:lanes:forward']);
-           turnLanes.backward = parseTurnLanes(tags['turn:lanes:backward']);
-
-           var maxspeedLanes = {};
-           maxspeedLanes.unspecified = parseMaxspeedLanes(tags['maxspeed:lanes'], maxspeed);
-           maxspeedLanes.forward = parseMaxspeedLanes(tags['maxspeed:lanes:forward'], maxspeed);
-           maxspeedLanes.backward = parseMaxspeedLanes(tags['maxspeed:lanes:backward'], maxspeed);
-
-           var psvLanes = {};
-           psvLanes.unspecified = parseMiscLanes(tags['psv:lanes']);
-           psvLanes.forward = parseMiscLanes(tags['psv:lanes:forward']);
-           psvLanes.backward = parseMiscLanes(tags['psv:lanes:backward']);
-
-           var busLanes = {};
-           busLanes.unspecified = parseMiscLanes(tags['bus:lanes']);
-           busLanes.forward = parseMiscLanes(tags['bus:lanes:forward']);
-           busLanes.backward = parseMiscLanes(tags['bus:lanes:backward']);
-
-           var taxiLanes = {};
-           taxiLanes.unspecified = parseMiscLanes(tags['taxi:lanes']);
-           taxiLanes.forward = parseMiscLanes(tags['taxi:lanes:forward']);
-           taxiLanes.backward = parseMiscLanes(tags['taxi:lanes:backward']);
-
-           var hovLanes = {};
-           hovLanes.unspecified = parseMiscLanes(tags['hov:lanes']);
-           hovLanes.forward = parseMiscLanes(tags['hov:lanes:forward']);
-           hovLanes.backward = parseMiscLanes(tags['hov:lanes:backward']);
-
-           var hgvLanes = {};
-           hgvLanes.unspecified = parseMiscLanes(tags['hgv:lanes']);
-           hgvLanes.forward = parseMiscLanes(tags['hgv:lanes:forward']);
-           hgvLanes.backward = parseMiscLanes(tags['hgv:lanes:backward']);
-
-           var bicyclewayLanes = {};
-           bicyclewayLanes.unspecified = parseBicycleWay(tags['bicycleway:lanes']);
-           bicyclewayLanes.forward = parseBicycleWay(tags['bicycleway:lanes:forward']);
-           bicyclewayLanes.backward = parseBicycleWay(tags['bicycleway:lanes:backward']);
-
-           var lanesObj = {
-               forward: [],
-               backward: [],
-               unspecified: []
-           };
-
-           // map forward/backward/unspecified of each lane type to lanesObj
-           mapToLanesObj(lanesObj, turnLanes, 'turnLane');
-           mapToLanesObj(lanesObj, maxspeedLanes, 'maxspeed');
-           mapToLanesObj(lanesObj, psvLanes, 'psv');
-           mapToLanesObj(lanesObj, busLanes, 'bus');
-           mapToLanesObj(lanesObj, taxiLanes, 'taxi');
-           mapToLanesObj(lanesObj, hovLanes, 'hov');
-           mapToLanesObj(lanesObj, hgvLanes, 'hgv');
-           mapToLanesObj(lanesObj, bicyclewayLanes, 'bicycleway');
-
-           return {
-               metadata: {
-                   count: laneCount,
-                   oneway: isOneWay,
-                   forward: forward,
-                   backward: backward,
-                   bothways: bothways,
-                   turnLanes: turnLanes,
-                   maxspeed: maxspeed,
-                   maxspeedLanes: maxspeedLanes,
-                   psvLanes: psvLanes,
-                   busLanes: busLanes,
-                   taxiLanes: taxiLanes,
-                   hovLanes: hovLanes,
-                   hgvLanes: hgvLanes,
-                   bicyclewayLanes: bicyclewayLanes
-               },
-               lanes: lanesObj
-           };
-       }
-
-
-       function getLaneCount(tags, isOneWay) {
-           var count;
-           if (tags.lanes) {
-               count = parseInt(tags.lanes, 10);
-               if (count > 0) {
-                   return count;
-               }
-           }
-
-
-           switch (tags.highway) {
-               case 'trunk':
-               case 'motorway':
-                   count = isOneWay ? 2 : 4;
-                   break;
-               default:
-                   count = isOneWay ? 1 : 2;
-                   break;
-           }
-
-           return count;
-       }
-
-
-       function parseMaxspeed(tags) {
-           var maxspeed = tags.maxspeed;
-           if (!maxspeed) { return; }
-
-           var maxspeedRegex = /^([0-9][\.0-9]+?)(?:[ ]?(?:km\/h|kmh|kph|mph|knots))?$/;
-           if (!maxspeedRegex.test(maxspeed)) { return; }
-
-           return parseInt(maxspeed, 10);
-       }
-
-
-       function parseLaneDirections(tags, isOneWay, laneCount) {
-           var forward = parseInt(tags['lanes:forward'], 10);
-           var backward = parseInt(tags['lanes:backward'], 10);
-           var bothways = parseInt(tags['lanes:both_ways'], 10) > 0 ? 1 : 0;
-
-           if (parseInt(tags.oneway, 10) === -1) {
-               forward = 0;
-               bothways = 0;
-               backward = laneCount;
-           }
-           else if (isOneWay) {
-               forward = laneCount;
-               bothways = 0;
-               backward = 0;
-           }
-           else if (isNaN(forward) && isNaN(backward)) {
-               backward = Math.floor((laneCount - bothways) / 2);
-               forward = laneCount - bothways - backward;
-           }
-           else if (isNaN(forward)) {
-               if (backward > laneCount - bothways) {
-                   backward = laneCount - bothways;
-               }
-               forward = laneCount - bothways - backward;
-           }
-           else if (isNaN(backward)) {
-               if (forward > laneCount - bothways) {
-                   forward = laneCount - bothways;
-               }
-               backward = laneCount - bothways - forward;
-           }
-           return {
-               forward: forward,
-               backward: backward,
-               bothways: bothways
-           };
-       }
-
-
-       function parseTurnLanes(tag){
-           if (!tag) { return; }
-
-           var validValues = [
-               'left', 'slight_left', 'sharp_left', 'through', 'right', 'slight_right',
-               'sharp_right', 'reverse', 'merge_to_left', 'merge_to_right', 'none'
-           ];
-
-           return tag.split('|')
-               .map(function (s) {
-                   if (s === '') { s = 'none'; }
-                   return s.split(';')
-                       .map(function (d) {
-                           return validValues.indexOf(d) === -1 ? 'unknown': d;
-                       });
-               });
-       }
-
-
-       function parseMaxspeedLanes(tag, maxspeed) {
-           if (!tag) { return; }
-
-           return tag.split('|')
-               .map(function (s) {
-                   if (s === 'none') { return s; }
-                   var m = parseInt(s, 10);
-                   if (s === '' || m === maxspeed) { return null; }
-                   return isNaN(m) ? 'unknown': m;
-               });
-       }
-
-
-       function parseMiscLanes(tag) {
-           if (!tag) { return; }
-
-           var validValues = [
-               'yes', 'no', 'designated'
-           ];
-
-           return tag.split('|')
-               .map(function (s) {
-                   if (s === '') { s = 'no'; }
-                   return validValues.indexOf(s) === -1 ? 'unknown': s;
-               });
-       }
-
-
-       function parseBicycleWay(tag) {
-           if (!tag) { return; }
-
-           var validValues = [
-               'yes', 'no', 'designated', 'lane'
-           ];
-
-           return tag.split('|')
-               .map(function (s) {
-                   if (s === '') { s = 'no'; }
-                   return validValues.indexOf(s) === -1 ? 'unknown': s;
-               });
-       }
-
-
-       function mapToLanesObj(lanesObj, data, key) {
-           if (data.forward) { data.forward.forEach(function(l, i) {
-               if (!lanesObj.forward[i]) { lanesObj.forward[i] = {}; }
-               lanesObj.forward[i][key] = l;
-           }); }
-           if (data.backward) { data.backward.forEach(function(l, i) {
-               if (!lanesObj.backward[i]) { lanesObj.backward[i] = {}; }
-               lanesObj.backward[i][key] = l;
-           }); }
-           if (data.unspecified) { data.unspecified.forEach(function(l, i) {
-               if (!lanesObj.unspecified[i]) { lanesObj.unspecified[i] = {}; }
-               lanesObj.unspecified[i][key] = l;
-           }); }
-       }
-
-       function osmWay() {
-           if (!(this instanceof osmWay)) {
-               return (new osmWay()).initialize(arguments);
-           } else if (arguments.length) {
-               this.initialize(arguments);
-           }
-       }
-
-
-       osmEntity.way = osmWay;
-
-       osmWay.prototype = Object.create(osmEntity.prototype);
-
-
-       Object.assign(osmWay.prototype, {
-           type: 'way',
-           nodes: [],
-
-
-           copy: function(resolver, copies) {
-               if (copies[this.id]) { return copies[this.id]; }
-
-               var copy = osmEntity.prototype.copy.call(this, resolver, copies);
-
-               var nodes = this.nodes.map(function(id) {
-                   return resolver.entity(id).copy(resolver, copies).id;
-               });
-
-               copy = copy.update({ nodes: nodes });
-               copies[this.id] = copy;
-
-               return copy;
-           },
-
-
-           extent: function(resolver) {
-               return resolver.transient(this, 'extent', function() {
-                   var extent = geoExtent();
-                   for (var i = 0; i < this.nodes.length; i++) {
-                       var node = resolver.hasEntity(this.nodes[i]);
-                       if (node) {
-                           extent._extend(node.extent());
-                       }
-                   }
-                   return extent;
-               });
-           },
-
-
-           first: function() {
-               return this.nodes[0];
-           },
-
-
-           last: function() {
-               return this.nodes[this.nodes.length - 1];
-           },
-
-
-           contains: function(node) {
-               return this.nodes.indexOf(node) >= 0;
-           },
-
-
-           affix: function(node) {
-               if (this.nodes[0] === node) { return 'prefix'; }
-               if (this.nodes[this.nodes.length - 1] === node) { return 'suffix'; }
-           },
-
-
-           layer: function() {
-               // explicit layer tag, clamp between -10, 10..
-               if (isFinite(this.tags.layer)) {
-                   return Math.max(-10, Math.min(+(this.tags.layer), 10));
-               }
-
-               // implied layer tag..
-               if (this.tags.covered === 'yes') { return -1; }
-               if (this.tags.location === 'overground') { return 1; }
-               if (this.tags.location === 'underground') { return -1; }
-               if (this.tags.location === 'underwater') { return -10; }
-
-               if (this.tags.power === 'line') { return 10; }
-               if (this.tags.power === 'minor_line') { return 10; }
-               if (this.tags.aerialway) { return 10; }
-               if (this.tags.bridge) { return 1; }
-               if (this.tags.cutting) { return -1; }
-               if (this.tags.tunnel) { return -1; }
-               if (this.tags.waterway) { return -1; }
-               if (this.tags.man_made === 'pipeline') { return -10; }
-               if (this.tags.boundary) { return -10; }
-               return 0;
-           },
-
-
-           // the approximate width of the line based on its tags except its `width` tag
-           impliedLineWidthMeters: function() {
-               var averageWidths = {
-                   highway: { // width is for single lane
-                       motorway: 5, motorway_link: 5, trunk: 4.5, trunk_link: 4.5,
-                       primary: 4, secondary: 4, tertiary: 4,
-                       primary_link: 4, secondary_link: 4, tertiary_link: 4,
-                       unclassified: 4, road: 4, living_street: 4, bus_guideway: 4, pedestrian: 4,
-                       residential: 3.5, service: 3.5, track: 3, cycleway: 2.5,
-                       bridleway: 2, corridor: 2, steps: 2, path: 1.5, footway: 1.5
-                   },
-                   railway: { // width includes ties and rail bed, not just track gauge
-                       rail: 2.5, light_rail: 2.5, tram: 2.5, subway: 2.5,
-                       monorail: 2.5, funicular: 2.5, disused: 2.5, preserved: 2.5,
-                       miniature: 1.5, narrow_gauge: 1.5
-                   },
-                   waterway: {
-                       river: 50, canal: 25, stream: 5, tidal_channel: 5, fish_pass: 2.5, drain: 2.5, ditch: 1.5
-                   }
-               };
-               for (var key in averageWidths) {
-                   if (this.tags[key] && averageWidths[key][this.tags[key]]) {
-                       var width = averageWidths[key][this.tags[key]];
-                       if (key === 'highway') {
-                           var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
-                           if (!laneCount) { laneCount = this.isOneWay() ? 1 : 2; }
-
-                           return width * laneCount;
-                       }
-                       return width;
-                   }
-               }
-               return null;
-           },
-
-
-           isOneWay: function() {
-               // explicit oneway tag..
-               var values = {
-                   'yes': true,
-                   '1': true,
-                   '-1': true,
-                   'reversible': true,
-                   'alternating': true,
-                   'no': false,
-                   '0': false
-               };
-               if (values[this.tags.oneway] !== undefined) {
-                   return values[this.tags.oneway];
-               }
-
-               // implied oneway tag..
-               for (var key in this.tags) {
-                   if (key in osmOneWayTags && (this.tags[key] in osmOneWayTags[key]))
-                       { return true; }
-               }
-               return false;
-           },
-
-           // Some identifier for tag that implies that this way is "sided",
-           // i.e. the right side is the 'inside' (e.g. the right side of a
-           // natural=cliff is lower).
-           sidednessIdentifier: function() {
-               for (var key in this.tags) {
-                   var value = this.tags[key];
-                   if (key in osmRightSideIsInsideTags && (value in osmRightSideIsInsideTags[key])) {
-                       if (osmRightSideIsInsideTags[key][value] === true) {
-                           return key;
-                       } else {
-                           // if the map's value is something other than a
-                           // literal true, we should use it so we can
-                           // special case some keys (e.g. natural=coastline
-                           // is handled differently to other naturals).
-                           return osmRightSideIsInsideTags[key][value];
-                       }
-                   }
-               }
-
-               return null;
-           },
-
-           isSided: function() {
-               if (this.tags.two_sided === 'yes') {
-                   return false;
-               }
-
-               return this.sidednessIdentifier() !== null;
-           },
-
-           lanes: function() {
-               return osmLanes(this);
-           },
-
-
-           isClosed: function() {
-               return this.nodes.length > 1 && this.first() === this.last();
-           },
-
-
-           isConvex: function(resolver) {
-               if (!this.isClosed() || this.isDegenerate()) { return null; }
-
-               var nodes = utilArrayUniq(resolver.childNodes(this));
-               var coords = nodes.map(function(n) { return n.loc; });
-               var curr = 0;
-               var prev = 0;
-
-               for (var i = 0; i < coords.length; i++) {
-                   var o = coords[(i+1) % coords.length];
-                   var a = coords[i];
-                   var b = coords[(i+2) % coords.length];
-                   var res = geoVecCross(a, b, o);
-
-                   curr = (res > 0) ? 1 : (res < 0) ? -1 : 0;
-                   if (curr === 0) {
-                       continue;
-                   } else if (prev && curr !== prev) {
-                       return false;
-                   }
-                   prev = curr;
-               }
-               return true;
-           },
-
-           // returns an object with the tag that implies this is an area, if any
-           tagSuggestingArea: function() {
-               return osmTagSuggestingArea(this.tags);
-           },
-
-           isArea: function() {
-               if (this.tags.area === 'yes')
-                   { return true; }
-               if (!this.isClosed() || this.tags.area === 'no')
-                   { return false; }
-               return this.tagSuggestingArea() !== null;
-           },
-
-
-           isDegenerate: function() {
-               return (new Set(this.nodes).size < (this.isArea() ? 3 : 2));
-           },
-
-
-           areAdjacent: function(n1, n2) {
-               for (var i = 0; i < this.nodes.length; i++) {
-                   if (this.nodes[i] === n1) {
-                       if (this.nodes[i - 1] === n2) { return true; }
-                       if (this.nodes[i + 1] === n2) { return true; }
-                   }
-               }
-               return false;
-           },
-
-
-           geometry: function(graph) {
-               return graph.transient(this, 'geometry', function() {
-                   return this.isArea() ? 'area' : 'line';
-               });
-           },
-
-
-           // returns an array of objects representing the segments between the nodes in this way
-           segments: function(graph) {
-
-               function segmentExtent(graph) {
-                   var n1 = graph.hasEntity(this.nodes[0]);
-                   var n2 = graph.hasEntity(this.nodes[1]);
-                   return n1 && n2 && geoExtent([
-                       [
-                           Math.min(n1.loc[0], n2.loc[0]),
-                           Math.min(n1.loc[1], n2.loc[1])
-                       ],
-                       [
-                           Math.max(n1.loc[0], n2.loc[0]),
-                           Math.max(n1.loc[1], n2.loc[1])
-                       ]
-                   ]);
-               }
-
-               return graph.transient(this, 'segments', function() {
-                   var segments = [];
-                   for (var i = 0; i < this.nodes.length - 1; i++) {
-                       segments.push({
-                           id: this.id + '-' + i,
-                           wayId: this.id,
-                           index: i,
-                           nodes: [this.nodes[i], this.nodes[i + 1]],
-                           extent: segmentExtent
-                       });
-                   }
-                   return segments;
-               });
-           },
-
-
-           // If this way is not closed, append the beginning node to the end of the nodelist to close it.
-           close: function() {
-               if (this.isClosed() || !this.nodes.length) { return this; }
-
-               var nodes = this.nodes.slice();
-               nodes = nodes.filter(noRepeatNodes);
-               nodes.push(nodes[0]);
-               return this.update({ nodes: nodes });
-           },
-
-
-           // If this way is closed, remove any connector nodes from the end of the nodelist to unclose it.
-           unclose: function() {
-               if (!this.isClosed()) { return this; }
-
-               var nodes = this.nodes.slice();
-               var connector = this.first();
-               var i = nodes.length - 1;
-
-               // remove trailing connectors..
-               while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-                   nodes.splice(i, 1);
-                   i = nodes.length - 1;
-               }
-
-               nodes = nodes.filter(noRepeatNodes);
-               return this.update({ nodes: nodes });
-           },
-
-
-           // Adds a node (id) in front of the node which is currently at position index.
-           // If index is undefined, the node will be added to the end of the way for linear ways,
-           //   or just before the final connecting node for circular ways.
-           // Consecutive duplicates are eliminated including existing ones.
-           // Circularity is always preserved when adding a node.
-           addNode: function(id, index) {
-               var nodes = this.nodes.slice();
-               var isClosed = this.isClosed();
-               var max = isClosed ? nodes.length - 1 : nodes.length;
-
-               if (index === undefined) {
-                   index = max;
-               }
-
-               if (index < 0 || index > max) {
-                   throw new RangeError('index ' + index + ' out of range 0..' + max);
-               }
-
-               // If this is a closed way, remove all connector nodes except the first one
-               // (there may be duplicates) and adjust index if necessary..
-               if (isClosed) {
-                   var connector = this.first();
-
-                   // leading connectors..
-                   var i = 1;
-                   while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-                       nodes.splice(i, 1);
-                       if (index > i) { index--; }
-                   }
-
-                   // trailing connectors..
-                   i = nodes.length - 1;
-                   while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-                       nodes.splice(i, 1);
-                       if (index > i) { index--; }
-                       i = nodes.length - 1;
-                   }
-               }
-
-               nodes.splice(index, 0, id);
-               nodes = nodes.filter(noRepeatNodes);
-
-               // If the way was closed before, append a connector node to keep it closed..
-               if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-                   nodes.push(nodes[0]);
-               }
-
-               return this.update({ nodes: nodes });
-           },
-
-
-           // Replaces the node which is currently at position index with the given node (id).
-           // Consecutive duplicates are eliminated including existing ones.
-           // Circularity is preserved when updating a node.
-           updateNode: function(id, index) {
-               var nodes = this.nodes.slice();
-               var isClosed = this.isClosed();
-               var max = nodes.length - 1;
-
-               if (index === undefined || index < 0 || index > max) {
-                   throw new RangeError('index ' + index + ' out of range 0..' + max);
-               }
-
-               // If this is a closed way, remove all connector nodes except the first one
-               // (there may be duplicates) and adjust index if necessary..
-               if (isClosed) {
-                   var connector = this.first();
-
-                   // leading connectors..
-                   var i = 1;
-                   while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-                       nodes.splice(i, 1);
-                       if (index > i) { index--; }
-                   }
-
-                   // trailing connectors..
-                   i = nodes.length - 1;
-                   while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-                       nodes.splice(i, 1);
-                       if (index === i) { index = 0; }  // update leading connector instead
-                       i = nodes.length - 1;
-                   }
-               }
-
-               nodes.splice(index, 1, id);
-               nodes = nodes.filter(noRepeatNodes);
-
-               // If the way was closed before, append a connector node to keep it closed..
-               if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-                   nodes.push(nodes[0]);
-               }
-
-               return this.update({nodes: nodes});
-           },
-
-
-           // Replaces each occurrence of node id needle with replacement.
-           // Consecutive duplicates are eliminated including existing ones.
-           // Circularity is preserved.
-           replaceNode: function(needleID, replacementID) {
-               var nodes = this.nodes.slice();
-               var isClosed = this.isClosed();
-
-               for (var i = 0; i < nodes.length; i++) {
-                   if (nodes[i] === needleID) {
-                       nodes[i] = replacementID;
-                   }
-               }
-
-               nodes = nodes.filter(noRepeatNodes);
-
-               // If the way was closed before, append a connector node to keep it closed..
-               if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-                   nodes.push(nodes[0]);
-               }
-
-               return this.update({nodes: nodes});
-           },
-
-
-           // Removes each occurrence of node id.
-           // Consecutive duplicates are eliminated including existing ones.
-           // Circularity is preserved.
-           removeNode: function(id) {
-               var nodes = this.nodes.slice();
-               var isClosed = this.isClosed();
-
-               nodes = nodes
-                   .filter(function(node) { return node !== id; })
-                   .filter(noRepeatNodes);
-
-               // If the way was closed before, append a connector node to keep it closed..
-               if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-                   nodes.push(nodes[0]);
-               }
-
-               return this.update({nodes: nodes});
-           },
-
-
-           asJXON: function(changeset_id) {
-               var r = {
-                   way: {
-                       '@id': this.osmId(),
-                       '@version': this.version || 0,
-                       nd: this.nodes.map(function(id) {
-                           return { keyAttributes: { ref: osmEntity.id.toOSM(id) } };
-                       }, this),
-                       tag: Object.keys(this.tags).map(function(k) {
-                           return { keyAttributes: { k: k, v: this.tags[k] } };
-                       }, this)
-                   }
-               };
-               if (changeset_id) {
-                   r.way['@changeset'] = changeset_id;
-               }
-               return r;
-           },
-
-
-           asGeoJSON: function(resolver) {
-               return resolver.transient(this, 'GeoJSON', function() {
-                   var coordinates = resolver.childNodes(this)
-                       .map(function(n) { return n.loc; });
-
-                   if (this.isArea() && this.isClosed()) {
-                       return {
-                           type: 'Polygon',
-                           coordinates: [coordinates]
-                       };
-                   } else {
-                       return {
-                           type: 'LineString',
-                           coordinates: coordinates
-                       };
-                   }
-               });
-           },
-
-
-           area: function(resolver) {
-               return resolver.transient(this, 'area', function() {
-                   var nodes = resolver.childNodes(this);
-
-                   var json = {
-                       type: 'Polygon',
-                       coordinates: [ nodes.map(function(n) { return n.loc; }) ]
-                   };
-
-                   if (!this.isClosed() && nodes.length) {
-                       json.coordinates[0].push(nodes[0].loc);
-                   }
-
-                   var area = d3_geoArea(json);
-
-                   // Heuristic for detecting counterclockwise winding order. Assumes
-                   // that OpenStreetMap polygons are not hemisphere-spanning.
-                   if (area > 2 * Math.PI) {
-                       json.coordinates[0] = json.coordinates[0].reverse();
-                       area = d3_geoArea(json);
-                   }
-
-                   return isNaN(area) ? 0 : area;
-               });
-           }
-       });
-
-
-       // Filter function to eliminate consecutive duplicates.
-       function noRepeatNodes(node, i, arr) {
-           return i === 0 || node !== arr[i - 1];
-       }
-
-       // "Old" multipolyons, previously known as "simple" multipolygons, are as follows:
-       //
-       // 1. Relation tagged with `type=multipolygon` and no interesting tags.
-       // 2. One and only one member with the `outer` role. Must be a way with interesting tags.
-       // 3. No members without a role.
-       //
-       // Old multipolygons are no longer recommended but are still rendered as areas by iD.
-
-       function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
-           if (entity.type !== 'relation' ||
-               !entity.isMultipolygon()
-               || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
-               return false;
-           }
-
-           var outerMember;
-           for (var memberIndex in entity.members) {
-               var member = entity.members[memberIndex];
-               if (!member.role || member.role === 'outer') {
-                   if (outerMember) { return false; }
-                   if (member.type !== 'way') { return false; }
-                   if (!graph.hasEntity(member.id)) { return false; }
-
-                   outerMember = graph.entity(member.id);
-
-                   if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
-                       return false;
-                   }
-               }
-           }
-
-           return outerMember;
-       }
-
-       // For fixing up rendering of multipolygons with tags on the outer member.
-       // https://github.com/openstreetmap/iD/issues/613
-       function osmIsOldMultipolygonOuterMember(entity, graph) {
-           if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0)
-               { return false; }
-
-           var parents = graph.parentRelations(entity);
-           if (parents.length !== 1)
-               { return false; }
-
-           var parent = parents[0];
-           if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1)
-               { return false; }
-
-           var members = parent.members, member;
-           for (var i = 0; i < members.length; i++) {
-               member = members[i];
-               if (member.id === entity.id && member.role && member.role !== 'outer')
-                   { return false; } // Not outer member
-               if (member.id !== entity.id && (!member.role || member.role === 'outer'))
-                   { return false; } // Not a simple multipolygon
-           }
-
-           return parent;
-       }
-
-
-       function osmOldMultipolygonOuterMember(entity, graph) {
-           if (entity.type !== 'way')
-               { return false; }
-
-           var parents = graph.parentRelations(entity);
-           if (parents.length !== 1)
-               { return false; }
-
-           var parent = parents[0];
-           if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1)
-               { return false; }
-
-           var members = parent.members, member, outerMember;
-           for (var i = 0; i < members.length; i++) {
-               member = members[i];
-               if (!member.role || member.role === 'outer') {
-                   if (outerMember)
-                       { return false; } // Not a simple multipolygon
-                   outerMember = member;
-               }
-           }
-
-           if (!outerMember)
-               { return false; }
-
-           var outerEntity = graph.hasEntity(outerMember.id);
-           if (!outerEntity || !Object.keys(outerEntity.tags).filter(osmIsInterestingTag).length)
-               { return false; }
-
-           return outerEntity;
-       }
-
-
-       // Join `toJoin` array into sequences of connecting ways.
-
-       // Segments which share identical start/end nodes will, as much as possible,
-       // be connected with each other.
-       //
-       // The return value is a nested array. Each constituent array contains elements
-       // of `toJoin` which have been determined to connect.
-       //
-       // Each consitituent array also has a `nodes` property whose value is an
-       // ordered array of member nodes, with appropriate order reversal and
-       // start/end coordinate de-duplication.
-       //
-       // Members of `toJoin` must have, at minimum, `type` and `id` properties.
-       // Thus either an array of `osmWay`s or a relation member array may be used.
-       //
-       // If an member is an `osmWay`, its tags and childnodes may be reversed via
-       // `actionReverse` in the output.
-       //
-       // The returned sequences array also has an `actions` array property, containing
-       // any reversal actions that should be applied to the graph, should the calling
-       // code attempt to actually join the given ways.
-       //
-       // Incomplete members (those for which `graph.hasEntity(element.id)` returns
-       // false) and non-way members are ignored.
-       //
-       function osmJoinWays(toJoin, graph) {
-           function resolve(member) {
-               return graph.childNodes(graph.entity(member.id));
-           }
-
-           function reverse(item) {
-               var action = actionReverse(item.id, { reverseOneway: true });
-               sequences.actions.push(action);
-               return (item instanceof osmWay) ? action(graph).entity(item.id) : item;
-           }
-
-           // make a copy containing only the items to join
-           toJoin = toJoin.filter(function(member) {
-               return member.type === 'way' && graph.hasEntity(member.id);
-           });
-
-           // Are the things we are joining relation members or `osmWays`?
-           // If `osmWays`, skip the "prefer a forward path" code below (see #4872)
-           var i;
-           var joinAsMembers = true;
-           for (i = 0; i < toJoin.length; i++) {
-               if (toJoin[i] instanceof osmWay) {
-                   joinAsMembers = false;
-                   break;
-               }
-           }
-
-           var sequences = [];
-           sequences.actions = [];
-
-           while (toJoin.length) {
-               // start a new sequence
-               var item = toJoin.shift();
-               var currWays = [item];
-               var currNodes = resolve(item).slice();
-               var doneSequence = false;
-
-               // add to it
-               while (toJoin.length && !doneSequence) {
-                   var start = currNodes[0];
-                   var end = currNodes[currNodes.length - 1];
-                   var fn = null;
-                   var nodes = null;
-
-                   // Find the next way/member to join.
-                   for (i = 0; i < toJoin.length; i++) {
-                       item = toJoin[i];
-                       nodes = resolve(item);
-
-                       // (for member ordering only, not way ordering - see #4872)
-                       // Strongly prefer to generate a forward path that preserves the order
-                       // of the members array. For multipolygons and most relations, member
-                       // order does not matter - but for routes, it does. (see #4589)
-                       // If we started this sequence backwards (i.e. next member way attaches to
-                       // the start node and not the end node), reverse the initial way before continuing.
-                       if (joinAsMembers && currWays.length === 1 && nodes[0] !== end && nodes[nodes.length - 1] !== end &&
-                           (nodes[nodes.length - 1] === start || nodes[0] === start)
-                       ) {
-                           currWays[0] = reverse(currWays[0]);
-                           currNodes.reverse();
-                           start = currNodes[0];
-                           end = currNodes[currNodes.length - 1];
-                       }
-
-                       if (nodes[0] === end) {
-                           fn = currNodes.push;               // join to end
-                           nodes = nodes.slice(1);
-                           break;
-                       } else if (nodes[nodes.length - 1] === end) {
-                           fn = currNodes.push;               // join to end
-                           nodes = nodes.slice(0, -1).reverse();
-                           item = reverse(item);
-                           break;
-                       } else if (nodes[nodes.length - 1] === start) {
-                           fn = currNodes.unshift;            // join to beginning
-                           nodes = nodes.slice(0, -1);
-                           break;
-                       } else if (nodes[0] === start) {
-                           fn = currNodes.unshift;            // join to beginning
-                           nodes = nodes.slice(1).reverse();
-                           item = reverse(item);
-                           break;
-                       } else {
-                           fn = nodes = null;
-                       }
-                   }
-
-                   if (!nodes) {     // couldn't find a joinable way/member
-                       doneSequence = true;
-                       break;
-                   }
-
-                   fn.apply(currWays, [item]);
-                   fn.apply(currNodes, nodes);
-
-                   toJoin.splice(i, 1);
-               }
-
-               currWays.nodes = currNodes;
-               sequences.push(currWays);
-           }
-
-           return sequences;
-       }
-
-       function actionAddMember(relationId, member, memberIndex, insertPair) {
-
-           return function action(graph) {
-               var relation = graph.entity(relationId);
-
-               // There are some special rules for Public Transport v2 routes.
-               var isPTv2 = /stop|platform/.test(member.role);
-
-               if ((isNaN(memberIndex) || insertPair) && member.type === 'way' && !isPTv2) {
-                   // Try to perform sensible inserts based on how the ways join together
-                   graph = addWayMember(relation, graph);
-               } else {
-                   // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
-                   // Stops and Platforms for PTv2 should be ordered first.
-                   // hack: We do not currently have the ability to place them in the exactly correct order.
-                   if (isPTv2 && isNaN(memberIndex)) {
-                       memberIndex = 0;
-                   }
-
-                   graph = graph.replace(relation.addMember(member, memberIndex));
-               }
-
-               return graph;
-           };
-
-
-           // Add a way member into the relation "wherever it makes sense".
-           // In this situation we were not supplied a memberIndex.
-           function addWayMember(relation, graph) {
-               var groups, tempWay, item, i, j, k;
-
-               // remove PTv2 stops and platforms before doing anything.
-               var PTv2members = [];
-               var members = [];
-               for (i = 0; i < relation.members.length; i++) {
-                   var m = relation.members[i];
-                   if (/stop|platform/.test(m.role)) {
-                       PTv2members.push(m);
-                   } else {
-                       members.push(m);
-                   }
-               }
-               relation = relation.update({ members: members });
-
-
-               if (insertPair) {
-                   // We're adding a member that must stay paired with an existing member.
-                   // (This feature is used by `actionSplit`)
-                   //
-                   // This is tricky because the members may exist multiple times in the
-                   // member list, and with different A-B/B-A ordering and different roles.
-                   // (e.g. a bus route that loops out and back - #4589).
-                   //
-                   // Replace the existing member with a temporary way,
-                   // so that `osmJoinWays` can treat the pair like a single way.
-                   tempWay = osmWay({ id: 'wTemp', nodes: insertPair.nodes });
-                   graph = graph.replace(tempWay);
-                   var tempMember = { id: tempWay.id, type: 'way', role: member.role };
-                   var tempRelation = relation.replaceMember({id: insertPair.originalID}, tempMember, true);
-                   groups = utilArrayGroupBy(tempRelation.members, 'type');
-                   groups.way = groups.way || [];
-
-               } else {
-                   // Add the member anywhere, one time. Just push and let `osmJoinWays` decide where to put it.
-                   groups = utilArrayGroupBy(relation.members, 'type');
-                   groups.way = groups.way || [];
-                   groups.way.push(member);
-               }
-
-               members = withIndex(groups.way);
-               var joined = osmJoinWays(members, graph);
-
-               // `joined` might not contain all of the way members,
-               // But will contain only the completed (downloaded) members
-               for (i = 0; i < joined.length; i++) {
-                   var segment = joined[i];
-                   var nodes = segment.nodes.slice();
-                   var startIndex = segment[0].index;
-
-                   // j = array index in `members` where this segment starts
-                   for (j = 0; j < members.length; j++) {
-                       if (members[j].index === startIndex) {
-                           break;
-                       }
-                   }
-
-                   // k = each member in segment
-                   for (k = 0; k < segment.length; k++) {
-                       item = segment[k];
-                       var way = graph.entity(item.id);
-
-                       // If this is a paired item, generate members in correct order and role
-                       if (tempWay && item.id === tempWay.id) {
-                           if (nodes[0].id === insertPair.nodes[0]) {
-                               item.pair = [
-                                   { id: insertPair.originalID, type: 'way', role: item.role },
-                                   { id: insertPair.insertedID, type: 'way', role: item.role }
-                               ];
-                           } else {
-                               item.pair = [
-                                   { id: insertPair.insertedID, type: 'way', role: item.role },
-                                   { id: insertPair.originalID, type: 'way', role: item.role }
-                               ];
-                           }
-                       }
-
-                       // reorder `members` if necessary
-                       if (k > 0) {
-                           if (j+k >= members.length || item.index !== members[j+k].index) {
-                               moveMember(members, item.index, j+k);
-                           }
-                       }
-
-                       nodes.splice(0, way.nodes.length - 1);
-                   }
-               }
-
-               if (tempWay) {
-                   graph = graph.remove(tempWay);
-               }
-
-               // Final pass: skip dead items, split pairs, remove index properties
-               var wayMembers = [];
-               for (i = 0; i < members.length; i++) {
-                   item = members[i];
-                   if (item.index === -1) { continue; }
-
-                   if (item.pair) {
-                       wayMembers.push(item.pair[0]);
-                       wayMembers.push(item.pair[1]);
-                   } else {
-                       wayMembers.push(utilObjectOmit(item, ['index']));
-                   }
-               }
-
-               // Put stops and platforms first, then nodes, ways, relations
-               // This is recommended for Public Transport v2 routes:
-               // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
-               var newMembers = PTv2members.concat( (groups.node || []), wayMembers, (groups.relation || []) );
-
-               return graph.replace(relation.update({ members: newMembers }));
-
-
-               // `moveMember()` changes the `members` array in place by splicing
-               // the item with `.index = findIndex` to where it belongs,
-               // and marking the old position as "dead" with `.index = -1`
-               //
-               // j=5, k=0                jk
-               // segment                 5 4 7 6
-               // members       0 1 2 3 4 5 6 7 8 9        keep 5 in j+k
-               //
-               // j=5, k=1                j k
-               // segment                 5 4 7 6
-               // members       0 1 2 3 4 5 6 7 8 9        move 4 to j+k
-               // members       0 1 2 3 x 5 4 6 7 8 9      moved
-               //
-               // j=5, k=2                j   k
-               // segment                 5 4 7 6
-               // members       0 1 2 3 x 5 4 6 7 8 9      move 7 to j+k
-               // members       0 1 2 3 x 5 4 7 6 x 8 9    moved
-               //
-               // j=5, k=3                j     k
-               // segment                 5 4 7 6
-               // members       0 1 2 3 x 5 4 7 6 x 8 9    keep 6 in j+k
-               //
-               function moveMember(arr, findIndex, toIndex) {
-                   for (var i = 0; i < arr.length; i++) {
-                       if (arr[i].index === findIndex) {
-                           break;
-                       }
-                   }
-
-                   var item = Object.assign({}, arr[i]);   // shallow copy
-                   arr[i].index = -1;   // mark as dead
-                   item.index = toIndex;
-                   arr.splice(toIndex, 0, item);
-               }
-
-
-               // This is the same as `Relation.indexedMembers`,
-               // Except we don't want to index all the members, only the ways
-               function withIndex(arr) {
-                   var result = new Array(arr.length);
-                   for (var i = 0; i < arr.length; i++) {
-                       result[i] = Object.assign({}, arr[i]);   // shallow copy
-                       result[i].index = i;
-                   }
-                   return result;
-               }
-           }
-
-       }
-
-       function actionAddMidpoint(midpoint, node) {
-           return function(graph) {
-               graph = graph.replace(node.move(midpoint.loc));
-
-               var parents = utilArrayIntersection(
-                   graph.parentWays(graph.entity(midpoint.edge[0])),
-                   graph.parentWays(graph.entity(midpoint.edge[1]))
-               );
-
-               parents.forEach(function(way) {
-                   for (var i = 0; i < way.nodes.length - 1; i++) {
-                       if (geoEdgeEqual([way.nodes[i], way.nodes[i + 1]], midpoint.edge)) {
-                           graph = graph.replace(graph.entity(way.id).addNode(node.id, i + 1));
-
-                           // Add only one midpoint on doubled-back segments,
-                           // turning them into self-intersections.
-                           return;
-                       }
-                   }
-               });
-
-               return graph;
-           };
-       }
-
-       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/AddNodeToWayAction.as
-       function actionAddVertex(wayId, nodeId, index) {
-           return function(graph) {
-               return graph.replace(graph.entity(wayId).addNode(nodeId, index));
-           };
-       }
-
-       function actionChangeMember(relationId, member, memberIndex) {
-           return function(graph) {
-               return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
-           };
-       }
-
-       function actionChangePreset(entityID, oldPreset, newPreset, skipFieldDefaults) {
-           return function action(graph) {
-               var entity = graph.entity(entityID);
-               var geometry = entity.geometry(graph);
-               var tags = entity.tags;
-
-               if (oldPreset) { tags = oldPreset.unsetTags(tags, geometry); }
-               if (newPreset) { tags = newPreset.setTags(tags, geometry, skipFieldDefaults); }
-
-               return graph.replace(entity.update({tags: tags}));
-           };
-       }
-
-       function actionChangeTags(entityId, tags) {
-           return function(graph) {
-               var entity = graph.entity(entityId);
-               return graph.replace(entity.update({tags: tags}));
-           };
-       }
-
-       function osmNode() {
-           if (!(this instanceof osmNode)) {
-               return (new osmNode()).initialize(arguments);
-           } else if (arguments.length) {
-               this.initialize(arguments);
-           }
-       }
-
-       osmEntity.node = osmNode;
-
-       osmNode.prototype = Object.create(osmEntity.prototype);
-
-       Object.assign(osmNode.prototype, {
-           type: 'node',
-           loc: [9999, 9999],
-
-           extent: function() {
-               return new geoExtent(this.loc);
-           },
-
-
-           geometry: function(graph) {
-               return graph.transient(this, 'geometry', function() {
-                   return graph.isPoi(this) ? 'point' : 'vertex';
-               });
-           },
-
-
-           move: function(loc) {
-               return this.update({loc: loc});
-           },
-
-
-           isDegenerate: function() {
-               return !(
-                   Array.isArray(this.loc) && this.loc.length === 2 &&
-                   this.loc[0] >= -180 && this.loc[0] <= 180 &&
-                   this.loc[1] >= -90 && this.loc[1] <= 90
-               );
-           },
-
-
-           // Inspect tags and geometry to determine which direction(s) this node/vertex points
-           directions: function(resolver, projection) {
-               var val;
-               var i;
-
-               // which tag to use?
-               if (this.isHighwayIntersection(resolver) && (this.tags.stop || '').toLowerCase() === 'all') {
-                   // all-way stop tag on a highway intersection
-                   val = 'all';
-               } else {
-                   // generic direction tag
-                   val = (this.tags.direction || '').toLowerCase();
-
-                   // better suffix-style direction tag
-                   var re = /:direction$/i;
-                   var keys = Object.keys(this.tags);
-                   for (i = 0; i < keys.length; i++) {
-                       if (re.test(keys[i])) {
-                           val = this.tags[keys[i]].toLowerCase();
-                           break;
-                       }
-                   }
-               }
-
-               if (val === '') { return []; }
-
-               var cardinal = {
-                   north: 0,               n: 0,
-                   northnortheast: 22,     nne: 22,
-                   northeast: 45,          ne: 45,
-                   eastnortheast: 67,      ene: 67,
-                   east: 90,               e: 90,
-                   eastsoutheast: 112,     ese: 112,
-                   southeast: 135,         se: 135,
-                   southsoutheast: 157,    sse: 157,
-                   south: 180,             s: 180,
-                   southsouthwest: 202,    ssw: 202,
-                   southwest: 225,         sw: 225,
-                   westsouthwest: 247,     wsw: 247,
-                   west: 270,              w: 270,
-                   westnorthwest: 292,     wnw: 292,
-                   northwest: 315,         nw: 315,
-                   northnorthwest: 337,    nnw: 337
-               };
-
-
-               var values = val.split(';');
-               var results = [];
-
-               values.forEach(function(v) {
-                   // swap cardinal for numeric directions
-                   if (cardinal[v] !== undefined) {
-                       v = cardinal[v];
-                   }
-
-                   // numeric direction - just add to results
-                   if (v !== '' && !isNaN(+v)) {
-                       results.push(+v);
-                       return;
-                   }
-
-                   // string direction - inspect parent ways
-                   var lookBackward =
-                       (this.tags['traffic_sign:backward'] || v === 'backward' || v === 'both' || v === 'all');
-                   var lookForward =
-                       (this.tags['traffic_sign:forward'] || v === 'forward' || v === 'both' || v === 'all');
-
-                   if (!lookForward && !lookBackward) { return; }
-
-                   var nodeIds = {};
-                   resolver.parentWays(this).forEach(function(parent) {
-                       var nodes = parent.nodes;
-                       for (i = 0; i < nodes.length; i++) {
-                           if (nodes[i] === this.id) {  // match current entity
-                               if (lookForward && i > 0) {
-                                   nodeIds[nodes[i - 1]] = true;  // look back to prev node
-                               }
-                               if (lookBackward && i < nodes.length - 1) {
-                                   nodeIds[nodes[i + 1]] = true;  // look ahead to next node
-                               }
-                           }
-                       }
-                   }, this);
-
-                   Object.keys(nodeIds).forEach(function(nodeId) {
-                       // +90 because geoAngle returns angle from X axis, not Y (north)
-                       results.push(
-                           (geoAngle(this, resolver.entity(nodeId), projection) * (180 / Math.PI)) + 90
-                       );
-                   }, this);
-
-               }, this);
-
-               return utilArrayUniq(results);
-           },
-
-
-           isEndpoint: function(resolver) {
-               return resolver.transient(this, 'isEndpoint', function() {
-                   var id = this.id;
-                   return resolver.parentWays(this).filter(function(parent) {
-                       return !parent.isClosed() && !!parent.affix(id);
-                   }).length > 0;
-               });
-           },
-
-
-           isConnected: function(resolver) {
-               return resolver.transient(this, 'isConnected', function() {
-                   var parents = resolver.parentWays(this);
-
-                   if (parents.length > 1) {
-                       // vertex is connected to multiple parent ways
-                       for (var i in parents) {
-                           if (parents[i].geometry(resolver) === 'line' &&
-                               parents[i].hasInterestingTags()) { return true; }
-                       }
-                   } else if (parents.length === 1) {
-                       var way = parents[0];
-                       var nodes = way.nodes.slice();
-                       if (way.isClosed()) { nodes.pop(); }  // ignore connecting node if closed
-
-                       // return true if vertex appears multiple times (way is self intersecting)
-                       return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
-                   }
-
-                   return false;
-               });
-           },
-
-
-           parentIntersectionWays: function(resolver) {
-               return resolver.transient(this, 'parentIntersectionWays', function() {
-                   return resolver.parentWays(this).filter(function(parent) {
-                       return (parent.tags.highway ||
-                           parent.tags.waterway ||
-                           parent.tags.railway ||
-                           parent.tags.aeroway) &&
-                           parent.geometry(resolver) === 'line';
-                   });
-               });
-           },
-
-
-           isIntersection: function(resolver) {
-               return this.parentIntersectionWays(resolver).length > 1;
-           },
-
-
-           isHighwayIntersection: function(resolver) {
-               return resolver.transient(this, 'isHighwayIntersection', function() {
-                   return resolver.parentWays(this).filter(function(parent) {
-                       return parent.tags.highway && parent.geometry(resolver) === 'line';
-                   }).length > 1;
-               });
-           },
-
-
-           isOnAddressLine: function(resolver) {
-               return resolver.transient(this, 'isOnAddressLine', function() {
-                   return resolver.parentWays(this).filter(function(parent) {
-                       return parent.tags.hasOwnProperty('addr:interpolation') &&
-                           parent.geometry(resolver) === 'line';
-                   }).length > 0;
-               });
-           },
-
-
-           asJXON: function(changeset_id) {
-               var r = {
-                   node: {
-                       '@id': this.osmId(),
-                       '@lon': this.loc[0],
-                       '@lat': this.loc[1],
-                       '@version': (this.version || 0),
-                       tag: Object.keys(this.tags).map(function(k) {
-                           return { keyAttributes: { k: k, v: this.tags[k] } };
-                       }, this)
-                   }
-               };
-               if (changeset_id) { r.node['@changeset'] = changeset_id; }
-               return r;
-           },
-
-
-           asGeoJSON: function() {
-               return {
-                   type: 'Point',
-                   coordinates: this.loc
-               };
-           }
-       });
-
-       function actionCircularize(wayId, projection, maxAngle) {
-           maxAngle = (maxAngle || 20) * Math.PI / 180;
-
-
-           var action = function(graph, t) {
-               if (t === null || !isFinite(t)) { t = 1; }
-               t = Math.min(Math.max(+t, 0), 1);
-
-               var way = graph.entity(wayId);
-               var origNodes = {};
-
-               graph.childNodes(way).forEach(function(node) {
-                   if (!origNodes[node.id]) { origNodes[node.id] = node; }
-               });
-
-               if (!way.isConvex(graph)) {
-                   graph = action.makeConvex(graph);
-               }
-
-               var nodes = utilArrayUniq(graph.childNodes(way));
-               var keyNodes = nodes.filter(function(n) { return graph.parentWays(n).length !== 1; });
-               var points = nodes.map(function(n) { return projection(n.loc); });
-               var keyPoints = keyNodes.map(function(n) { return projection(n.loc); });
-               var centroid = (points.length === 2) ? geoVecInterp(points[0], points[1], 0.5) : d3_polygonCentroid(points);
-               var radius = d3_median(points, function(p) { return geoVecLength(centroid, p); });
-               var sign = d3_polygonArea(points) > 0 ? 1 : -1;
-               var ids, i, j, k;
-
-               // we need atleast two key nodes for the algorithm to work
-               if (!keyNodes.length) {
-                   keyNodes = [nodes[0]];
-                   keyPoints = [points[0]];
-               }
-
-               if (keyNodes.length === 1) {
-                   var index = nodes.indexOf(keyNodes[0]);
-                   var oppositeIndex = Math.floor((index + nodes.length / 2) % nodes.length);
-
-                   keyNodes.push(nodes[oppositeIndex]);
-                   keyPoints.push(points[oppositeIndex]);
-               }
-
-               // key points and nodes are those connected to the ways,
-               // they are projected onto the circle, inbetween nodes are moved
-               // to constant intervals between key nodes, extra inbetween nodes are
-               // added if necessary.
-               for (i = 0; i < keyPoints.length; i++) {
-                   var nextKeyNodeIndex = (i + 1) % keyNodes.length;
-                   var startNode = keyNodes[i];
-                   var endNode = keyNodes[nextKeyNodeIndex];
-                   var startNodeIndex = nodes.indexOf(startNode);
-                   var endNodeIndex = nodes.indexOf(endNode);
-                   var numberNewPoints = -1;
-                   var indexRange = endNodeIndex - startNodeIndex;
-                   var nearNodes = {};
-                   var inBetweenNodes = [];
-                   var startAngle, endAngle, totalAngle, eachAngle;
-                   var angle, loc, node, origNode;
-
-                   if (indexRange < 0) {
-                       indexRange += nodes.length;
-                   }
-
-                   // position this key node
-                   var distance = geoVecLength(centroid, keyPoints[i]) || 1e-4;
-                   keyPoints[i] = [
-                       centroid[0] + (keyPoints[i][0] - centroid[0]) / distance * radius,
-                       centroid[1] + (keyPoints[i][1] - centroid[1]) / distance * radius
-                   ];
-                   loc = projection.invert(keyPoints[i]);
-                   node = keyNodes[i];
-                   origNode = origNodes[node.id];
-                   node = node.move(geoVecInterp(origNode.loc, loc, t));
-                   graph = graph.replace(node);
-
-                   // figure out the between delta angle we want to match to
-                   startAngle = Math.atan2(keyPoints[i][1] - centroid[1], keyPoints[i][0] - centroid[0]);
-                   endAngle = Math.atan2(keyPoints[nextKeyNodeIndex][1] - centroid[1], keyPoints[nextKeyNodeIndex][0] - centroid[0]);
-                   totalAngle = endAngle - startAngle;
-
-                   // detects looping around -pi/pi
-                   if (totalAngle * sign > 0) {
-                       totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
-                   }
-
-                   do {
-                       numberNewPoints++;
-                       eachAngle = totalAngle / (indexRange + numberNewPoints);
-                   } while (Math.abs(eachAngle) > maxAngle);
-
-
-                   // move existing nodes
-                   for (j = 1; j < indexRange; j++) {
-                       angle = startAngle + j * eachAngle;
-                       loc = projection.invert([
-                           centroid[0] + Math.cos(angle) * radius,
-                           centroid[1] + Math.sin(angle) * radius
-                       ]);
-
-                       node = nodes[(j + startNodeIndex) % nodes.length];
-                       origNode = origNodes[node.id];
-                       nearNodes[node.id] = angle;
-
-                       node = node.move(geoVecInterp(origNode.loc, loc, t));
-                       graph = graph.replace(node);
-                   }
-
-                   // add new inbetween nodes if necessary
-                   for (j = 0; j < numberNewPoints; j++) {
-                       angle = startAngle + (indexRange + j) * eachAngle;
-                       loc = projection.invert([
-                           centroid[0] + Math.cos(angle) * radius,
-                           centroid[1] + Math.sin(angle) * radius
-                       ]);
-
-                       // choose a nearnode to use as the original
-                       var min = Infinity;
-                       for (var nodeId in nearNodes) {
-                           var nearAngle = nearNodes[nodeId];
-                           var dist = Math.abs(nearAngle - angle);
-                           if (dist < min) {
-                               dist = min;
-                               origNode = origNodes[nodeId];
-                           }
-                       }
-
-                       node = osmNode({ loc: geoVecInterp(origNode.loc, loc, t) });
-                       graph = graph.replace(node);
-
-                       nodes.splice(endNodeIndex + j, 0, node);
-                       inBetweenNodes.push(node.id);
-                   }
-
-                   // Check for other ways that share these keyNodes..
-                   // If keyNodes are adjacent in both ways,
-                   // we can add inBetween nodes to that shared way too..
-                   if (indexRange === 1 && inBetweenNodes.length) {
-                       var startIndex1 = way.nodes.lastIndexOf(startNode.id);
-                       var endIndex1 = way.nodes.lastIndexOf(endNode.id);
-                       var wayDirection1 = (endIndex1 - startIndex1);
-                       if (wayDirection1 < -1) { wayDirection1 = 1; }
-
-                       var parentWays = graph.parentWays(keyNodes[i]);
-                       for (j = 0; j < parentWays.length; j++) {
-                           var sharedWay = parentWays[j];
-                           if (sharedWay === way) { continue; }
-
-                           if (sharedWay.areAdjacent(startNode.id, endNode.id)) {
-                               var startIndex2 = sharedWay.nodes.lastIndexOf(startNode.id);
-                               var endIndex2 = sharedWay.nodes.lastIndexOf(endNode.id);
-                               var wayDirection2 = (endIndex2 - startIndex2);
-                               var insertAt = endIndex2;
-                               if (wayDirection2 < -1) { wayDirection2 = 1; }
-
-                               if (wayDirection1 !== wayDirection2) {
-                                   inBetweenNodes.reverse();
-                                   insertAt = startIndex2;
-                               }
-                               for (k = 0; k < inBetweenNodes.length; k++) {
-                                   sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
-                               }
-                               graph = graph.replace(sharedWay);
-                           }
-                       }
-                   }
-
-               }
-
-               // update the way to have all the new nodes
-               ids = nodes.map(function(n) { return n.id; });
-               ids.push(ids[0]);
-
-               way = way.update({nodes: ids});
-               graph = graph.replace(way);
-
-               return graph;
-           };
-
-
-           action.makeConvex = function(graph) {
-               var way = graph.entity(wayId);
-               var nodes = utilArrayUniq(graph.childNodes(way));
-               var points = nodes.map(function(n) { return projection(n.loc); });
-               var sign = d3_polygonArea(points) > 0 ? 1 : -1;
-               var hull = d3_polygonHull(points);
-               var i, j;
-
-               // D3 convex hulls go counterclockwise..
-               if (sign === -1) {
-                   nodes.reverse();
-                   points.reverse();
-               }
-
-               for (i = 0; i < hull.length - 1; i++) {
-                   var startIndex = points.indexOf(hull[i]);
-                   var endIndex = points.indexOf(hull[i+1]);
-                   var indexRange = (endIndex - startIndex);
-
-                   if (indexRange < 0) {
-                       indexRange += nodes.length;
-                   }
-
-                   // move interior nodes to the surface of the convex hull..
-                   for (j = 1; j < indexRange; j++) {
-                       var point = geoVecInterp(hull[i], hull[i+1], j / indexRange);
-                       var node = nodes[(j + startIndex) % nodes.length].move(projection.invert(point));
-                       graph = graph.replace(node);
-                   }
-               }
-               return graph;
-           };
-
-
-           action.disabled = function(graph) {
-               if (!graph.entity(wayId).isClosed()) {
-                   return 'not_closed';
-               }
-
-               //disable when already circular
-               var way = graph.entity(wayId);
-               var nodes = utilArrayUniq(graph.childNodes(way));
-               var points = nodes.map(function(n) { return projection(n.loc); });
-               var hull = d3_polygonHull(points);
-               var epsilonAngle =  Math.PI / 180;
-               if (hull.length !== points.length || hull.length < 3){
-                   return false;
-               }
-               var centroid = d3_polygonCentroid(points);
-               var radius = geoVecLengthSquare(centroid, points[0]);
-
-               // compare distances between centroid and points
-               for (var i = 0; i<hull.length; i++){
-                   var actualPoint = hull[i];
-                   var actualDist = geoVecLengthSquare(actualPoint, centroid);
-                   var diff = Math.abs(actualDist - radius);
-                   //compare distances with epsilon-error (5%)
-                   if (diff > 0.05*radius) {
-                       return false;
-                   }
-               }
-               
-               //check if central angles are smaller than maxAngle
-               for (i = 0; i<hull.length; i++){
-                   actualPoint = hull[i];
-                   var nextPoint = hull[(i+1)%hull.length];
-                   var startAngle = Math.atan2(actualPoint[1] - centroid[1], actualPoint[0] - centroid[0]);
-                   var endAngle = Math.atan2(nextPoint[1] - centroid[1], nextPoint[0] - centroid[0]);
-                   var angle = endAngle - startAngle;
-                   if (angle < 0) {
-                       angle = -angle;
-                   }
-                   if (angle > Math.PI){
-                       angle = (2*Math.PI - angle);
-                   }
-        
-                   if (angle > maxAngle + epsilonAngle) {
-                       return false;
-                   }
-               }
-               return 'already_circular';
-           };
-
-
-           action.transitionable = true;
-
-
-           return action;
-       }
-
-       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/DeleteWayAction.as
-       function actionDeleteWay(wayID) {
-
-           function canDeleteNode(node, graph) {
-               // don't delete nodes still attached to ways or relations
-               if (graph.parentWays(node).length ||
-                   graph.parentRelations(node).length) { return false; }
-
-               var geometries = osmNodeGeometriesForTags(node.tags);
-               // don't delete if this node can be a standalone point
-               if (geometries.point) { return false; }
-               // delete if this node only be a vertex
-               if (geometries.vertex) { return true; }
-
-               // iD doesn't know if this should be a point or vertex,
-               // so only delete if there are no interesting tags
-               return !node.hasInterestingTags();
-           }
-
-
-           var action = function(graph) {
-               var way = graph.entity(wayID);
-
-               graph.parentRelations(way).forEach(function(parent) {
-                   parent = parent.removeMembersWithID(wayID);
-                   graph = graph.replace(parent);
-
-                   if (parent.isDegenerate()) {
-                       graph = actionDeleteRelation(parent.id)(graph);
-                   }
-               });
-
-               (new Set(way.nodes)).forEach(function(nodeID) {
-                   graph = graph.replace(way.removeNode(nodeID));
-
-                   var node = graph.entity(nodeID);
-                   if (canDeleteNode(node, graph)) {
-                       graph = graph.remove(node);
-                   }
-               });
-
-               return graph.remove(way);
-           };
-
-
-           return action;
-       }
-
-       function actionDeleteMultiple(ids) {
-           var actions = {
-               way: actionDeleteWay,
-               node: actionDeleteNode,
-               relation: actionDeleteRelation
-           };
-
-
-           var action = function(graph) {
-               ids.forEach(function(id) {
-                   if (graph.hasEntity(id)) { // It may have been deleted aready.
-                       graph = actions[graph.entity(id).type](id)(graph);
-                   }
-               });
-
-               return graph;
-           };
-
-
-           return action;
-       }
-
-       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/DeleteRelationAction.as
-       function actionDeleteRelation(relationID, allowUntaggedMembers) {
-
-           function canDeleteEntity(entity, graph) {
-               return !graph.parentWays(entity).length &&
-                   !graph.parentRelations(entity).length &&
-                   (!entity.hasInterestingTags() && !allowUntaggedMembers);
-           }
-
-
-           var action = function(graph) {
-               var relation = graph.entity(relationID);
-
-               graph.parentRelations(relation)
-                   .forEach(function(parent) {
-                       parent = parent.removeMembersWithID(relationID);
-                       graph = graph.replace(parent);
-
-                       if (parent.isDegenerate()) {
-                           graph = actionDeleteRelation(parent.id)(graph);
-                       }
-                   });
-
-               var memberIDs = utilArrayUniq(relation.members.map(function(m) { return m.id; }));
-               memberIDs.forEach(function(memberID) {
-                   graph = graph.replace(relation.removeMembersWithID(memberID));
-
-                   var entity = graph.entity(memberID);
-                   if (canDeleteEntity(entity, graph)) {
-                       graph = actionDeleteMultiple([memberID])(graph);
-                   }
-               });
-
-               return graph.remove(relation);
-           };
-
-
-           return action;
-       }
-
-       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/DeleteNodeAction.as
-       function actionDeleteNode(nodeId) {
-           var action = function(graph) {
-               var node = graph.entity(nodeId);
-
-               graph.parentWays(node)
-                   .forEach(function(parent) {
-                       parent = parent.removeNode(nodeId);
-                       graph = graph.replace(parent);
-
-                       if (parent.isDegenerate()) {
-                           graph = actionDeleteWay(parent.id)(graph);
-                       }
-                   });
-
-               graph.parentRelations(node)
-                   .forEach(function(parent) {
-                       parent = parent.removeMembersWithID(nodeId);
-                       graph = graph.replace(parent);
-
-                       if (parent.isDegenerate()) {
-                           graph = actionDeleteRelation(parent.id)(graph);
-                       }
-                   });
-
-               return graph.remove(node);
-           };
-
-
-           return action;
-       }
-
-       // Connect the ways at the given nodes.
-       //
-       // First choose a node to be the survivor, with preference given
-       // to an existing (not new) node.
-       //
-       // Tags and relation memberships of of non-surviving nodes are merged
-       // to the survivor.
-       //
-       // This is the inverse of `iD.actionDisconnect`.
-       //
-       // Reference:
-       //   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeNodesAction.as
-       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/MergeNodesAction.java
-       //
-       function actionConnect(nodeIDs) {
-           var action = function(graph) {
-               var survivor;
-               var node;
-               var parents;
-               var i, j;
-
-               // Choose a survivor node, prefer an existing (not new) node - #4974
-               for (i = 0; i < nodeIDs.length; i++) {
-                   survivor = graph.entity(nodeIDs[i]);
-                   if (survivor.version) { break; }  // found one
-               }
-
-               // Replace all non-surviving nodes with the survivor and merge tags.
-               for (i = 0; i < nodeIDs.length; i++) {
-                   node = graph.entity(nodeIDs[i]);
-                   if (node.id === survivor.id) { continue; }
-
-                   parents = graph.parentWays(node);
-                   for (j = 0; j < parents.length; j++) {
-                       graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
-                   }
-
-                   parents = graph.parentRelations(node);
-                   for (j = 0; j < parents.length; j++) {
-                       graph = graph.replace(parents[j].replaceMember(node, survivor));
-                   }
-
-                   survivor = survivor.mergeTags(node.tags);
-                   graph = actionDeleteNode(node.id)(graph);
-               }
-
-               graph = graph.replace(survivor);
-
-               // find and delete any degenerate ways created by connecting adjacent vertices
-               parents = graph.parentWays(survivor);
-               for (i = 0; i < parents.length; i++) {
-                   if (parents[i].isDegenerate()) {
-                       graph = actionDeleteWay(parents[i].id)(graph);
-                   }
-               }
-
-               return graph;
-           };
-
-
-           action.disabled = function(graph) {
-               var seen = {};
-               var restrictionIDs = [];
-               var survivor;
-               var node, way;
-               var relations, relation, role;
-               var i, j, k;
-
-               // Choose a survivor node, prefer an existing (not new) node - #4974
-               for (i = 0; i < nodeIDs.length; i++) {
-                   survivor = graph.entity(nodeIDs[i]);
-                   if (survivor.version) { break; }  // found one
-               }
-
-               // 1. disable if the nodes being connected have conflicting relation roles
-               for (i = 0; i < nodeIDs.length; i++) {
-                   node = graph.entity(nodeIDs[i]);
-                   relations = graph.parentRelations(node);
-
-                   for (j = 0; j < relations.length; j++) {
-                       relation = relations[j];
-                       role = relation.memberById(node.id).role || '';
-
-                       // if this node is a via node in a restriction, remember for later
-                       if (relation.hasFromViaTo()) {
-                           restrictionIDs.push(relation.id);
-                       }
-
-                       if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
-                           return 'relation';
-                       } else {
-                           seen[relation.id] = role;
-                       }
-                   }
-               }
-
-               // gather restrictions for parent ways
-               for (i = 0; i < nodeIDs.length; i++) {
-                   node = graph.entity(nodeIDs[i]);
-
-                   var parents = graph.parentWays(node);
-                   for (j = 0; j < parents.length; j++) {
-                       var parent = parents[j];
-                       relations = graph.parentRelations(parent);
-
-                       for (k = 0; k < relations.length; k++) {
-                           relation = relations[k];
-                           if (relation.hasFromViaTo()) {
-                               restrictionIDs.push(relation.id);
-                           }
-                       }
-                   }
-               }
-
-
-               // test restrictions
-               restrictionIDs = utilArrayUniq(restrictionIDs);
-               for (i = 0; i < restrictionIDs.length; i++) {
-                   relation = graph.entity(restrictionIDs[i]);
-                   if (!relation.isComplete(graph)) { continue; }
-
-                   var memberWays = relation.members
-                       .filter(function(m) { return m.type === 'way'; })
-                       .map(function(m) { return graph.entity(m.id); });
-
-                   memberWays = utilArrayUniq(memberWays);
-                   var f = relation.memberByRole('from');
-                   var t = relation.memberByRole('to');
-                   var isUturn = (f.id === t.id);
-
-                   // 2a. disable if connection would damage a restriction
-                   // (a key node is a node at the junction of ways)
-                   var nodes = { from: [], via: [], to: [], keyfrom: [], keyto: [] };
-                   for (j = 0; j < relation.members.length; j++) {
-                       collectNodes(relation.members[j], nodes);
-                   }
-
-                   nodes.keyfrom = utilArrayUniq(nodes.keyfrom.filter(hasDuplicates));
-                   nodes.keyto = utilArrayUniq(nodes.keyto.filter(hasDuplicates));
-
-                   var filter = keyNodeFilter(nodes.keyfrom, nodes.keyto);
-                   nodes.from = nodes.from.filter(filter);
-                   nodes.via = nodes.via.filter(filter);
-                   nodes.to = nodes.to.filter(filter);
-
-                   var connectFrom = false;
-                   var connectVia = false;
-                   var connectTo = false;
-                   var connectKeyFrom = false;
-                   var connectKeyTo = false;
-
-                   for (j = 0; j < nodeIDs.length; j++) {
-                       var n = nodeIDs[j];
-                       if (nodes.from.indexOf(n) !== -1)    { connectFrom = true; }
-                       if (nodes.via.indexOf(n) !== -1)     { connectVia = true; }
-                       if (nodes.to.indexOf(n) !== -1)      { connectTo = true; }
-                       if (nodes.keyfrom.indexOf(n) !== -1) { connectKeyFrom = true; }
-                       if (nodes.keyto.indexOf(n) !== -1)   { connectKeyTo = true; }
-                   }
-                   if (connectFrom && connectTo && !isUturn) { return 'restriction'; }
-                   if (connectFrom && connectVia) { return 'restriction'; }
-                   if (connectTo   && connectVia) { return 'restriction'; }
-
-                   // connecting to a key node -
-                   // if both nodes are on a member way (i.e. part of the turn restriction),
-                   // the connecting node must be adjacent to the key node.
-                   if (connectKeyFrom || connectKeyTo) {
-                       if (nodeIDs.length !== 2) { return 'restriction'; }
-
-                       var n0 = null;
-                       var n1 = null;
-                       for (j = 0; j < memberWays.length; j++) {
-                           way = memberWays[j];
-                           if (way.contains(nodeIDs[0])) { n0 = nodeIDs[0]; }
-                           if (way.contains(nodeIDs[1])) { n1 = nodeIDs[1]; }
-                       }
-
-                       if (n0 && n1) {    // both nodes are part of the restriction
-                           var ok = false;
-                           for (j = 0; j < memberWays.length; j++) {
-                               way = memberWays[j];
-                               if (way.areAdjacent(n0, n1)) {
-                                   ok = true;
-                                   break;
-                               }
-                           }
-                           if (!ok) {
-                               return 'restriction';
-                           }
-                       }
-                   }
-
-                   // 2b. disable if nodes being connected will destroy a member way in a restriction
-                   // (to test, make a copy and try actually connecting the nodes)
-                   for (j = 0; j < memberWays.length; j++) {
-                       way = memberWays[j].update({});   // make copy
-                       for (k = 0; k < nodeIDs.length; k++) {
-                           if (nodeIDs[k] === survivor.id) { continue; }
-
-                           if (way.areAdjacent(nodeIDs[k], survivor.id)) {
-                               way = way.removeNode(nodeIDs[k]);
-                           } else {
-                               way = way.replaceNode(nodeIDs[k], survivor.id);
-                           }
-                       }
-                       if (way.isDegenerate()) {
-                           return 'restriction';
-                       }
-                   }
-               }
-
-               return false;
-
-
-               // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
-               function hasDuplicates(n, i, arr) {
-                   return arr.indexOf(n) !== arr.lastIndexOf(n);
-               }
-
-               function keyNodeFilter(froms, tos) {
-                   return function(n) {
-                       return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
-                   };
-               }
-
-               function collectNodes(member, collection) {
-                   var entity = graph.hasEntity(member.id);
-                   if (!entity) { return; }
-
-                   var role = member.role || '';
-                   if (!collection[role]) {
-                       collection[role] = [];
-                   }
-
-                   if (member.type === 'node') {
-                       collection[role].push(member.id);
-                       if (role === 'via') {
-                           collection.keyfrom.push(member.id);
-                           collection.keyto.push(member.id);
-                       }
-
-                   } else if (member.type === 'way') {
-                       collection[role].push.apply(collection[role], entity.nodes);
-                       if (role === 'from' || role === 'via') {
-                           collection.keyfrom.push(entity.first());
-                           collection.keyfrom.push(entity.last());
-                       }
-                       if (role === 'to' || role === 'via') {
-                           collection.keyto.push(entity.first());
-                           collection.keyto.push(entity.last());
-                       }
-                   }
-               }
-           };
-
-
-           return action;
-       }
-
-       function actionCopyEntities(ids, fromGraph) {
-           var _copies = {};
-
-
-           var action = function(graph) {
-               ids.forEach(function(id) {
-                   fromGraph.entity(id).copy(fromGraph, _copies);
-               });
-
-               for (var id in _copies) {
-                   graph = graph.replace(_copies[id]);
-               }
-
-               return graph;
-           };
-
-
-           action.copies = function() {
-               return _copies;
-           };
-
-
-           return action;
-       }
-
-       function actionDeleteMember(relationId, memberIndex) {
-           return function(graph) {
-               var relation = graph.entity(relationId)
-                   .removeMember(memberIndex);
-
-               graph = graph.replace(relation);
-
-               if (relation.isDegenerate())
-                   { graph = actionDeleteRelation(relation.id)(graph); }
-
-               return graph;
-           };
-       }
-
-       function actionDiscardTags(difference, discardTags) {
-         discardTags = discardTags || {};
-
-         return function (graph) {
-           difference.modified().forEach(checkTags);
-           difference.created().forEach(checkTags);
-           return graph;
-
-           function checkTags(entity) {
-             var keys = Object.keys(entity.tags);
-             var didDiscard = false;
-             var tags = {};
-
-             for (var i = 0; i < keys.length; i++) {
-               var k = keys[i];
-               if (discardTags[k] || !entity.tags[k]) {
-                 didDiscard = true;
-               } else {
-                 tags[k] = entity.tags[k];
-               }
-             }
-             if (didDiscard) {
-               graph = graph.replace(entity.update({ tags: tags }));
-             }
-           }
-
-         };
-       }
-
-       // Disconect the ways at the given node.
-       //
-       // Optionally, disconnect only the given ways.
-       //
-       // For testing convenience, accepts an ID to assign to the (first) new node.
-       // Normally, this will be undefined and the way will automatically
-       // be assigned a new ID.
-       //
-       // This is the inverse of `iD.actionConnect`.
-       //
-       // Reference:
-       //   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/UnjoinNodeAction.as
-       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/UnGlueAction.java
-       //
-       function actionDisconnect(nodeId, newNodeId) {
-           var wayIds;
-
-
-           var action = function(graph) {
-               var node = graph.entity(nodeId);
-               var connections = action.connections(graph);
-
-               connections.forEach(function(connection) {
-                   var way = graph.entity(connection.wayID);
-                   var newNode = osmNode({id: newNodeId, loc: node.loc, tags: node.tags});
-
-                   graph = graph.replace(newNode);
-                   if (connection.index === 0 && way.isArea()) {
-                       // replace shared node with shared node..
-                       graph = graph.replace(way.replaceNode(way.nodes[0], newNode.id));
-                   } else if (way.isClosed() && connection.index === way.nodes.length - 1) {
-                       // replace closing node with new new node..
-                       graph = graph.replace(way.unclose().addNode(newNode.id));
-                   } else {
-                       // replace shared node with multiple new nodes..
-                       graph = graph.replace(way.updateNode(newNode.id, connection.index));
-                   }
-               });
-
-               return graph;
-           };
-
-
-           action.connections = function(graph) {
-               var candidates = [];
-               var keeping = false;
-               var parentWays = graph.parentWays(graph.entity(nodeId));
-               var way, waynode;
-               for (var i = 0; i < parentWays.length; i++) {
-                   way = parentWays[i];
-                   if (wayIds && wayIds.indexOf(way.id) === -1) {
-                       keeping = true;
-                       continue;
-                   }
-                   if (way.isArea() && (way.nodes[0] === nodeId)) {
-                       candidates.push({ wayID: way.id, index: 0 });
-                   } else {
-                       for (var j = 0; j < way.nodes.length; j++) {
-                           waynode = way.nodes[j];
-                           if (waynode === nodeId) {
-                               if (way.isClosed() &&
-                                   parentWays.length > 1 &&
-                                   wayIds &&
-                                   wayIds.indexOf(way.id) !== -1 &&
-                                   j === way.nodes.length - 1) {
-                                   continue;
-                               }
-                               candidates.push({ wayID: way.id, index: j });
-                           }
-                       }
-                   }
-               }
-
-               return keeping ? candidates : candidates.slice(1);
-           };
-
-
-           action.disabled = function(graph) {
-               var connections = action.connections(graph);
-               if (connections.length === 0)
-                   { return 'not_connected'; }
-
-               var parentWays = graph.parentWays(graph.entity(nodeId));
-               var seenRelationIds = {};
-               var sharedRelation;
-
-               parentWays.forEach(function(way) {
-                   var relations = graph.parentRelations(way);
-                   relations.forEach(function(relation) {
-                       if (relation.id in seenRelationIds) {
-                           if (wayIds) {
-                               if (wayIds.indexOf(way.id) !== -1 ||
-                                   wayIds.indexOf(seenRelationIds[relation.id]) !== -1) {
-                                   sharedRelation = relation;
-                               }
-                           } else {
-                               sharedRelation = relation;
-                           }
-                       } else {
-                           seenRelationIds[relation.id] = way.id;
-                       }
-                   });
-               });
-
-               if (sharedRelation)
-                   { return 'relation'; }
-           };
-
-
-           action.limitWays = function(val) {
-               if (!arguments.length) { return wayIds; }
-               wayIds = val;
-               return action;
-           };
-
-
-           return action;
-       }
-
-       function actionExtract(entityID) {
-
-           var extractedNodeID;
-
-           var action = function(graph) {
-               var entity = graph.entity(entityID);
-
-               if (entity.type === 'node') {
-                   return extractFromNode(entity, graph);
-               }
-
-               return extractFromWayOrRelation(entity, graph);
-           };
-
-           function extractFromNode(node, graph) {
-
-               extractedNodeID = node.id;
-
-               // Create a new node to replace the one we will detach
-               var replacement = osmNode({ loc: node.loc });
-               graph = graph.replace(replacement);
-
-               // Process each way in turn, updating the graph as we go
-               graph = graph.parentWays(node)
-                   .reduce(function(accGraph, parentWay) {
-                       return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
-                   }, graph);
-
-               // Process any relations too
-               return graph.parentRelations(node)
-                   .reduce(function(accGraph, parentRel) {
-                       return accGraph.replace(parentRel.replaceMember(node, replacement));
-                   }, graph);
-           }
-
-           function extractFromWayOrRelation(entity, graph) {
-
-               var fromGeometry = entity.geometry(graph);
-
-               var keysToCopyAndRetain = ['source', 'wheelchair'];
-               var keysToRetain = ['area'];
-               var buildingKeysToRetain = ['architect', 'building', 'height', 'layer'];
-
-               var extractedLoc = d3_geoCentroid(entity.asGeoJSON(graph));
-               if (!extractedLoc  || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
-                   extractedLoc = entity.extent(graph).center();
-               }
-
-               var isBuilding = entity.tags.building && entity.tags.building !== 'no';
-
-               var entityTags = Object.assign({}, entity.tags);  // shallow copy
-               var pointTags = {};
-               for (var key in entityTags) {
-
-                   if (entity.type === 'relation' &&
-                       key === 'type') {
-                       continue;
-                   }
-
-                   if (keysToRetain.indexOf(key) !== -1) {
-                       continue;
-                   }
-
-                   if (isBuilding) {
-                       // don't transfer building-related tags
-                       if (buildingKeysToRetain.indexOf(key) !== -1 ||
-                           key.match(/^building:.{1,}/) ||
-                           key.match(/^roof:.{1,}/)) { continue; }
-                   }
-
-                   // copy the tag from the entity to the point
-                   pointTags[key] = entityTags[key];
-
-                   // leave addresses and some other tags so they're on both features
-                   if (keysToCopyAndRetain.indexOf(key) !== -1 ||
-                       key.match(/^addr:.{1,}/)) {
-                       continue;
-                   }
-
-                   // remove the tag from the entity
-                   delete entityTags[key];
-               }
-
-               if (!isBuilding && fromGeometry === 'area') {
-                   // ensure that areas keep area geometry
-                   entityTags.area = 'yes';
-               }
-
-               var replacement = osmNode({ loc: extractedLoc, tags: pointTags });
-               graph = graph.replace(replacement);
-
-               extractedNodeID = replacement.id;
-
-               return graph.replace(entity.update({tags: entityTags}));
-           }
-
-           action.getExtractedNodeID = function() {
-               return extractedNodeID;
-           };
-
-           return action;
-       }
-
-       // Join ways at the end node they share.
-       //
-       // This is the inverse of `iD.actionSplit`.
-       //
-       // Reference:
-       //   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeWaysAction.as
-       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/CombineWayAction.java
-       //
-       function actionJoin(ids) {
-
-           function groupEntitiesByGeometry(graph) {
-               var entities = ids.map(function(id) { return graph.entity(id); });
-               return Object.assign(
-                   { line: [] },
-                   utilArrayGroupBy(entities, function(entity) { return entity.geometry(graph); })
-               );
-           }
-
-
-           var action = function(graph) {
-               var ways = ids.map(graph.entity, graph);
-               var survivorID = ways[0].id;
-
-               // if any of the ways are sided (e.g. coastline, cliff, kerb)
-               // sort them first so they establish the overall order - #6033
-               ways.sort(function(a, b) {
-                   var aSided = a.isSided();
-                   var bSided = b.isSided();
-                   return (aSided && !bSided) ? -1
-                       : (bSided && !aSided) ? 1
-                       : 0;
-               });
-
-               // Prefer to keep an existing way.
-               for (var i = 0; i < ways.length; i++) {
-                   if (!ways[i].isNew()) {
-                       survivorID = ways[i].id;
-                       break;
-                   }
-               }
-
-               var sequences = osmJoinWays(ways, graph);
-               var joined = sequences[0];
-
-               // We might need to reverse some of these ways before joining them.  #4688
-               // `joined.actions` property will contain any actions we need to apply.
-               graph = sequences.actions.reduce(function(g, action) { return action(g); }, graph);
-
-               var survivor = graph.entity(survivorID);
-               survivor = survivor.update({ nodes: joined.nodes.map(function(n) { return n.id; }) });
-               graph = graph.replace(survivor);
-
-               joined.forEach(function(way) {
-                   if (way.id === survivorID) { return; }
-
-                   graph.parentRelations(way).forEach(function(parent) {
-                       graph = graph.replace(parent.replaceMember(way, survivor));
-                   });
-
-                   survivor = survivor.mergeTags(way.tags);
-
-                   graph = graph.replace(survivor);
-                   graph = actionDeleteWay(way.id)(graph);
-               });
-
-               // Finds if the join created a single-member multipolygon,
-               // and if so turns it into a basic area instead
-               function checkForSimpleMultipolygon() {
-                   if (!survivor.isClosed()) { return; }
-
-                   var multipolygons = graph.parentMultipolygons(survivor).filter(function(multipolygon) {
-                       // find multipolygons where the survivor is the only member
-                       return multipolygon.members.length === 1;
-                   });
-
-                   // skip if this is the single member of multiple multipolygons
-                   if (multipolygons.length !== 1) { return; }
-
-                   var multipolygon = multipolygons[0];
-
-                   for (var key in survivor.tags) {
-                       if (multipolygon.tags[key] &&
-                           // don't collapse if tags cannot be cleanly merged
-                           multipolygon.tags[key] !== survivor.tags[key]) { return; }
-                   }
-
-                   survivor = survivor.mergeTags(multipolygon.tags);
-                   graph = graph.replace(survivor);
-                   graph = actionDeleteRelation(multipolygon.id, true /* allow untagged members */)(graph);
-
-                   var tags = Object.assign({}, survivor.tags);
-                   if (survivor.geometry(graph) !== 'area') {
-                       // ensure the feature persists as an area
-                       tags.area = 'yes';
-                   }
-                   delete tags.type; // remove type=multipolygon
-                   survivor = survivor.update({ tags: tags });
-                   graph = graph.replace(survivor);
-               }
-               checkForSimpleMultipolygon();
-
-               return graph;
-           };
-
-           // Returns the number of nodes the resultant way is expected to have
-           action.resultingWayNodesLength = function(graph) {
-               return ids.reduce(function(count, id) {
-                   return count + graph.entity(id).nodes.length;
-               }, 0) - ids.length - 1;
-           };
-
-
-           action.disabled = function(graph) {
-               var geometries = groupEntitiesByGeometry(graph);
-               if (ids.length < 2 || ids.length !== geometries.line.length) {
-                   return 'not_eligible';
-               }
-
-               var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
-               if (joined.length > 1) {
-                   return 'not_adjacent';
-               }
-
-               // Loop through all combinations of path-pairs
-               // to check potential intersections between all pairs
-               for (var i = 0; i < ids.length - 1; i++) {
-                   for (var j = i + 1; j < ids.length; j++) {
-                       var path1 = graph.childNodes(graph.entity(ids[i]))
-                           .map(function(e) { return e.loc; });
-                       var path2 = graph.childNodes(graph.entity(ids[j]))
-                           .map(function(e) { return e.loc; });
-                       var intersections = geoPathIntersections(path1, path2);
-
-                       // Check if intersections are just nodes lying on top of
-                       // each other/the line, as opposed to crossing it
-                       var common = utilArrayIntersection(
-                           joined[0].nodes.map(function(n) { return n.loc.toString(); }),
-                           intersections.map(function(n) { return n.toString(); })
-                       );
-                       if (common.length !== intersections.length) {
-                           return 'paths_intersect';
-                       }
-                   }
-               }
-
-               var nodeIds = joined[0].nodes.map(function(n) { return n.id; }).slice(1, -1);
-               var relation;
-               var tags = {};
-               var conflicting = false;
-
-               joined[0].forEach(function(way) {
-                   var parents = graph.parentRelations(way);
-                   parents.forEach(function(parent) {
-                       if (parent.isRestriction() && parent.members.some(function(m) { return nodeIds.indexOf(m.id) >= 0; })) {
-                           relation = parent;
-                       }
-                   });
-
-                   for (var k in way.tags) {
-                       if (!(k in tags)) {
-                           tags[k] = way.tags[k];
-                       } else if (tags[k] && osmIsInterestingTag(k) && tags[k] !== way.tags[k]) {
-                           conflicting = true;
-                       }
-                   }
-               });
-
-               if (relation) {
-                   return 'restriction';
-               }
-
-               if (conflicting) {
-                   return 'conflicting_tags';
-               }
-           };
-
-
-           return action;
-       }
-
-       function actionMerge(ids) {
-
-           function groupEntitiesByGeometry(graph) {
-               var entities = ids.map(function(id) { return graph.entity(id); });
-               return Object.assign(
-                   { point: [], area: [], line: [], relation: [] },
-                   utilArrayGroupBy(entities, function(entity) { return entity.geometry(graph); })
-               );
-           }
-
-
-           var action = function(graph) {
-               var geometries = groupEntitiesByGeometry(graph);
-               var target = geometries.area[0] || geometries.line[0];
-               var points = geometries.point;
-
-               points.forEach(function(point) {
-                   target = target.mergeTags(point.tags);
-                   graph = graph.replace(target);
-
-                   graph.parentRelations(point).forEach(function(parent) {
-                       graph = graph.replace(parent.replaceMember(point, target));
-                   });
-
-                   var nodes = utilArrayUniq(graph.childNodes(target));
-                   var removeNode = point;
-
-                   for (var i = 0; i < nodes.length; i++) {
-                       var node = nodes[i];
-                       if (graph.parentWays(node).length > 1 ||
-                           graph.parentRelations(node).length ||
-                           node.hasInterestingTags()) {
-                           continue;
-                       }
-
-                       // Found an uninteresting child node on the target way.
-                       // Move orig point into its place to preserve point's history. #3683
-                       graph = graph.replace(point.update({ tags: {}, loc: node.loc }));
-                       target = target.replaceNode(node.id, point.id);
-                       graph = graph.replace(target);
-                       removeNode = node;
-                       break;
-                   }
-
-                   graph = graph.remove(removeNode);
-               });
-
-               if (target.tags.area === 'yes') {
-                   var tags = Object.assign({}, target.tags); // shallow copy
-                   delete tags.area;
-                   if (osmTagSuggestingArea(tags)) {
-                       // remove the `area` tag if area geometry is now implied - #3851
-                       target = target.update({ tags: tags });
-                       graph = graph.replace(target);
-                   }
-               }
-
-               return graph;
-           };
-
-
-           action.disabled = function(graph) {
-               var geometries = groupEntitiesByGeometry(graph);
-               if (geometries.point.length === 0 ||
-                   (geometries.area.length + geometries.line.length) !== 1 ||
-                   geometries.relation.length !== 0) {
-                   return 'not_eligible';
-               }
-           };
-
-
-           return action;
-       }
-
-       // `actionMergeNodes` is just a combination of:
-       //
-       // 1. move all the nodes to a common location
-       // 2. `actionConnect` them
-
-       function actionMergeNodes(nodeIDs, loc) {
-
-           // If there is a single "interesting" node, use that as the location.
-           // Otherwise return the average location of all the nodes.
-           function chooseLoc(graph) {
-               if (!nodeIDs.length) { return null; }
-               var sum = [0,0];
-               var interestingCount = 0;
-               var interestingLoc;
-
-               for (var i = 0; i < nodeIDs.length; i++) {
-                   var node = graph.entity(nodeIDs[i]);
-                   if (node.hasInterestingTags()) {
-                       interestingLoc = (++interestingCount === 1) ? node.loc : null;
-                   }
-                   sum = geoVecAdd(sum, node.loc);
-               }
-
-               return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
-           }
-
-
-           var action = function(graph) {
-               if (nodeIDs.length < 2) { return graph; }
-               var toLoc = loc;
-               if (!toLoc) {
-                   toLoc = chooseLoc(graph);
-               }
-
-               for (var i = 0; i < nodeIDs.length; i++) {
-                   var node = graph.entity(nodeIDs[i]);
-                   if (node.loc !== toLoc) {
-                       graph = graph.replace(node.move(toLoc));
-                   }
-               }
-
-               return actionConnect(nodeIDs)(graph);
-           };
-
-
-           action.disabled = function(graph) {
-               if (nodeIDs.length < 2) { return 'not_eligible'; }
-
-               for (var i = 0; i < nodeIDs.length; i++) {
-                   var entity = graph.entity(nodeIDs[i]);
-                   if (entity.type !== 'node') { return 'not_eligible'; }
-               }
-
-               return actionConnect(nodeIDs).disabled(graph);
-           };
-
-           return action;
+       function styleFunction$1(name, value, priority) {
+         return function () {
+           var v = value.apply(this, arguments);
+           if (v == null) this.style.removeProperty(name);else this.style.setProperty(name, v, priority);
+         };

        }
 
        }
 

-       function osmChangeset() {
-           if (!(this instanceof osmChangeset)) {
-               return (new osmChangeset()).initialize(arguments);
-           } else if (arguments.length) {
-               this.initialize(arguments);
-           }
+       function selection_style (name, value, priority) {
+         return arguments.length > 1 ? this.each((value == null ? styleRemove$1 : typeof value === "function" ? styleFunction$1 : styleConstant$1)(name, value, priority == null ? "" : priority)) : styleValue(this.node(), name);

        }
        }

-
-
-       osmEntity.changeset = osmChangeset;
-
-       osmChangeset.prototype = Object.create(osmEntity.prototype);
-
-       Object.assign(osmChangeset.prototype, {
-
-           type: 'changeset',
-
-
-           extent: function() {
-               return new geoExtent();
-           },
-
-
-           geometry: function() {
-               return 'changeset';
-           },
-
-
-           asJXON: function() {
-               return {
-                   osm: {
-                       changeset: {
-                           tag: Object.keys(this.tags).map(function(k) {
-                               return { '@k': k, '@v': this.tags[k] };
-                           }, this),
-                           '@version': 0.6,
-                           '@generator': 'iD'
-                       }
-                   }
-               };
-           },
-
-
-           // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
-           // XML. Returns a string.
-           osmChangeJXON: function(changes) {
-               var changeset_id = this.id;
-
-               function nest(x, order) {
-                   var groups = {};
-                   for (var i = 0; i < x.length; i++) {
-                       var tagName = Object.keys(x[i])[0];
-                       if (!groups[tagName]) { groups[tagName] = []; }
-                       groups[tagName].push(x[i][tagName]);
-                   }
-                   var ordered = {};
-                   order.forEach(function(o) {
-                       if (groups[o]) { ordered[o] = groups[o]; }
-                   });
-                   return ordered;
-               }
-
-
-               // sort relations in a changeset by dependencies
-               function sort(changes) {
-
-                   // find a referenced relation in the current changeset
-                   function resolve(item) {
-                       return relations.find(function(relation) {
-                           return item.keyAttributes.type === 'relation'
-                               && item.keyAttributes.ref === relation['@id'];
-                       });
-                   }
-
-                   // a new item is an item that has not been already processed
-                   function isNew(item) {
-                       return !sorted[ item['@id'] ] && !processing.find(function(proc) {
-                           return proc['@id'] === item['@id'];
-                       });
-                   }
-
-                   var processing = [];
-                   var sorted = {};
-                   var relations = changes.relation;
-
-                   if (!relations) { return changes; }
-
-                   for (var i = 0; i < relations.length; i++) {
-                       var relation = relations[i];
-
-                       // skip relation if already sorted
-                       if (!sorted[relation['@id']]) {
-                           processing.push(relation);
-                       }
-
-                       while (processing.length > 0) {
-                           var next = processing[0],
-                           deps = next.member.map(resolve).filter(Boolean).filter(isNew);
-                           if (deps.length === 0) {
-                               sorted[next['@id']] = next;
-                               processing.shift();
-                           } else {
-                               processing = deps.concat(processing);
-                           }
-                       }
-                   }
-
-                   changes.relation = Object.values(sorted);
-                   return changes;
-               }
-
-               function rep(entity) {
-                   return entity.asJXON(changeset_id);
-               }
-
-               return {
-                   osmChange: {
-                       '@version': 0.6,
-                       '@generator': 'iD',
-                       'create': sort(nest(changes.created.map(rep), ['node', 'way', 'relation'])),
-                       'modify': nest(changes.modified.map(rep), ['node', 'way', 'relation']),
-                       'delete': Object.assign(nest(changes.deleted.map(rep), ['relation', 'way', 'node']), { '@if-unused': true })
-                   }
-               };
-           },
-
-
-           asGeoJSON: function() {
-               return {};
-           }
-
-       });
-
-       function osmNote() {
-           if (!(this instanceof osmNote)) {
-               return (new osmNote()).initialize(arguments);
-           } else if (arguments.length) {
-               this.initialize(arguments);
-           }
+       function styleValue(node, name) {
+         return node.style.getPropertyValue(name) || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);

        }
 
        }
 

-
-       osmNote.id = function() {
-           return osmNote.id.next--;
-       };
-
-
-       osmNote.id.next = -1;
-
-
-       Object.assign(osmNote.prototype, {
-
-           type: 'note',
-
-           initialize: function(sources) {
-               for (var i = 0; i < sources.length; ++i) {
-                   var source = sources[i];
-                   for (var prop in source) {
-                       if (Object.prototype.hasOwnProperty.call(source, prop)) {
-                           if (source[prop] === undefined) {
-                               delete this[prop];
-                           } else {
-                               this[prop] = source[prop];
-                           }
-                       }
-                   }
-               }
-
-               if (!this.id) {
-                   this.id = osmNote.id() + '';  // as string
-               }
-
-               return this;
-           },
-
-           extent: function() {
-               return new geoExtent(this.loc);
-           },
-
-           update: function(attrs) {
-               return osmNote(this, attrs); // {v: 1 + (this.v || 0)}
-           },
-
-           isNew: function() {
-               return this.id < 0;
-           },
-
-           move: function(loc) {
-               return this.update({ loc: loc });
-           }
-
-       });
-
-       function osmRelation() {
-           if (!(this instanceof osmRelation)) {
-               return (new osmRelation()).initialize(arguments);
-           } else if (arguments.length) {
-               this.initialize(arguments);
-           }
+       function propertyRemove(name) {
+         return function () {
+           delete this[name];
+         };

        }
 
        }
 

-
-       osmEntity.relation = osmRelation;
-
-       osmRelation.prototype = Object.create(osmEntity.prototype);
-
-
-       osmRelation.creationOrder = function(a, b) {
-           var aId = parseInt(osmEntity.id.toOSM(a.id), 10);
-           var bId = parseInt(osmEntity.id.toOSM(b.id), 10);
-
-           if (aId < 0 || bId < 0) { return aId - bId; }
-           return bId - aId;
-       };
-
-
-       Object.assign(osmRelation.prototype, {
-           type: 'relation',
-           members: [],
-
-
-           copy: function(resolver, copies) {
-               if (copies[this.id]) { return copies[this.id]; }
-
-               var copy = osmEntity.prototype.copy.call(this, resolver, copies);
-
-               var members = this.members.map(function(member) {
-                   return Object.assign({}, member, { id: resolver.entity(member.id).copy(resolver, copies).id });
-               });
-
-               copy = copy.update({members: members});
-               copies[this.id] = copy;
-
-               return copy;
-           },
-
-
-           extent: function(resolver, memo) {
-               return resolver.transient(this, 'extent', function() {
-                   if (memo && memo[this.id]) { return geoExtent(); }
-                   memo = memo || {};
-                   memo[this.id] = true;
-
-                   var extent = geoExtent();
-                   for (var i = 0; i < this.members.length; i++) {
-                       var member = resolver.hasEntity(this.members[i].id);
-                       if (member) {
-                           extent._extend(member.extent(resolver, memo));
-                       }
-                   }
-                   return extent;
-               });
-           },
-
-
-           geometry: function(graph) {
-               return graph.transient(this, 'geometry', function() {
-                   return this.isMultipolygon() ? 'area' : 'relation';
-               });
-           },
-
-
-           isDegenerate: function() {
-               return this.members.length === 0;
-           },
-
-
-           // Return an array of members, each extended with an 'index' property whose value
-           // is the member index.
-           indexedMembers: function() {
-               var result = new Array(this.members.length);
-               for (var i = 0; i < this.members.length; i++) {
-                   result[i] = Object.assign({}, this.members[i], {index: i});
-               }
-               return result;
-           },
-
-
-           // Return the first member with the given role. A copy of the member object
-           // is returned, extended with an 'index' property whose value is the member index.
-           memberByRole: function(role) {
-               for (var i = 0; i < this.members.length; i++) {
-                   if (this.members[i].role === role) {
-                       return Object.assign({}, this.members[i], {index: i});
-                   }
-               }
-           },
-
-           // Same as memberByRole, but returns all members with the given role
-           membersByRole: function(role) {
-               var result = [];
-               for (var i = 0; i < this.members.length; i++) {
-                   if (this.members[i].role === role) {
-                       result.push(Object.assign({}, this.members[i], {index: i}));
-                   }
-               }
-               return result;
-           },
-
-           // Return the first member with the given id. A copy of the member object
-           // is returned, extended with an 'index' property whose value is the member index.
-           memberById: function(id) {
-               for (var i = 0; i < this.members.length; i++) {
-                   if (this.members[i].id === id) {
-                       return Object.assign({}, this.members[i], {index: i});
-                   }
-               }
-           },
-
-
-           // Return the first member with the given id and role. A copy of the member object
-           // is returned, extended with an 'index' property whose value is the member index.
-           memberByIdAndRole: function(id, role) {
-               for (var i = 0; i < this.members.length; i++) {
-                   if (this.members[i].id === id && this.members[i].role === role) {
-                       return Object.assign({}, this.members[i], {index: i});
-                   }
-               }
-           },
-
-
-           addMember: function(member, index) {
-               var members = this.members.slice();
-               members.splice(index === undefined ? members.length : index, 0, member);
-               return this.update({members: members});
-           },
-
-
-           updateMember: function(member, index) {
-               var members = this.members.slice();
-               members.splice(index, 1, Object.assign({}, members[index], member));
-               return this.update({members: members});
-           },
-
-
-           removeMember: function(index) {
-               var members = this.members.slice();
-               members.splice(index, 1);
-               return this.update({members: members});
-           },
-
-
-           removeMembersWithID: function(id) {
-               var members = this.members.filter(function(m) { return m.id !== id; });
-               return this.update({members: members});
-           },
-
-           moveMember: function(fromIndex, toIndex) {
-               var members = this.members.slice();
-               members.splice(toIndex, 0, members.splice(fromIndex, 1)[0]);
-               return this.update({members: members});
-           },
-
-
-           // Wherever a member appears with id `needle.id`, replace it with a member
-           // with id `replacement.id`, type `replacement.type`, and the original role,
-           // By default, adding a duplicate member (by id and role) is prevented.
-           // Return an updated relation.
-           replaceMember: function(needle, replacement, keepDuplicates) {
-               if (!this.memberById(needle.id)) { return this; }
-
-               var members = [];
-
-               for (var i = 0; i < this.members.length; i++) {
-                   var member = this.members[i];
-                   if (member.id !== needle.id) {
-                       members.push(member);
-                   } else if (keepDuplicates || !this.memberByIdAndRole(replacement.id, member.role)) {
-                       members.push({ id: replacement.id, type: replacement.type, role: member.role });
-                   }
-               }
-
-               return this.update({ members: members });
-           },
-
-
-           asJXON: function(changeset_id) {
-               var r = {
-                   relation: {
-                       '@id': this.osmId(),
-                       '@version': this.version || 0,
-                       member: this.members.map(function(member) {
-                           return {
-                               keyAttributes: {
-                                   type: member.type,
-                                   role: member.role,
-                                   ref: osmEntity.id.toOSM(member.id)
-                               }
-                           };
-                       }, this),
-                       tag: Object.keys(this.tags).map(function(k) {
-                           return { keyAttributes: { k: k, v: this.tags[k] } };
-                       }, this)
-                   }
-               };
-               if (changeset_id) {
-                   r.relation['@changeset'] = changeset_id;
-               }
-               return r;
-           },
-
-
-           asGeoJSON: function(resolver) {
-               return resolver.transient(this, 'GeoJSON', function () {
-                   if (this.isMultipolygon()) {
-                       return {
-                           type: 'MultiPolygon',
-                           coordinates: this.multipolygon(resolver)
-                       };
-                   } else {
-                       return {
-                           type: 'FeatureCollection',
-                           properties: this.tags,
-                           features: this.members.map(function (member) {
-                               return Object.assign({role: member.role}, resolver.entity(member.id).asGeoJSON(resolver));
-                           })
-                       };
-                   }
-               });
-           },
-
-
-           area: function(resolver) {
-               return resolver.transient(this, 'area', function() {
-                   return d3_geoArea(this.asGeoJSON(resolver));
-               });
-           },
-
-
-           isMultipolygon: function() {
-               return this.tags.type === 'multipolygon';
-           },
-
-
-           isComplete: function(resolver) {
-               for (var i = 0; i < this.members.length; i++) {
-                   if (!resolver.hasEntity(this.members[i].id)) {
-                       return false;
-                   }
-               }
-               return true;
-           },
-
-
-           hasFromViaTo: function() {
-               return (
-                   this.members.some(function(m) { return m.role === 'from'; }) &&
-                   this.members.some(function(m) { return m.role === 'via'; }) &&
-                   this.members.some(function(m) { return m.role === 'to'; })
-               );
-           },
-
-
-           isRestriction: function() {
-               return !!(this.tags.type && this.tags.type.match(/^restriction:?/));
-           },
-
-
-           isValidRestriction: function() {
-               if (!this.isRestriction()) { return false; }
-
-               var froms = this.members.filter(function(m) { return m.role === 'from'; });
-               var vias = this.members.filter(function(m) { return m.role === 'via'; });
-               var tos = this.members.filter(function(m) { return m.role === 'to'; });
-
-               if (froms.length !== 1 && this.tags.restriction !== 'no_entry') { return false; }
-               if (froms.some(function(m) { return m.type !== 'way'; })) { return false; }
-
-               if (tos.length !== 1 && this.tags.restriction !== 'no_exit') { return false; }
-               if (tos.some(function(m) { return m.type !== 'way'; })) { return false; }
-
-               if (vias.length === 0) { return false; }
-               if (vias.length > 1 && vias.some(function(m) { return m.type !== 'way'; })) { return false; }
-
-               return true;
-           },
-
-
-           // Returns an array [A0, ... An], each Ai being an array of node arrays [Nds0, ... Ndsm],
-           // where Nds0 is an outer ring and subsequent Ndsi's (if any i > 0) being inner rings.
-           //
-           // This corresponds to the structure needed for rendering a multipolygon path using a
-           // `evenodd` fill rule, as well as the structure of a GeoJSON MultiPolygon geometry.
-           //
-           // In the case of invalid geometries, this function will still return a result which
-           // includes the nodes of all way members, but some Nds may be unclosed and some inner
-           // rings not matched with the intended outer ring.
-           //
-           multipolygon: function(resolver) {
-               var outers = this.members.filter(function(m) { return 'outer' === (m.role || 'outer'); });
-               var inners = this.members.filter(function(m) { return 'inner' === m.role; });
-
-               outers = osmJoinWays(outers, resolver);
-               inners = osmJoinWays(inners, resolver);
-
-               var sequenceToLineString = function(sequence) {
-                   if (sequence.nodes.length > 2 &&
-                       sequence.nodes[0] !== sequence.nodes[sequence.nodes.length - 1]) {
-                       // close unclosed parts to ensure correct area rendering - #2945
-                       sequence.nodes.push(sequence.nodes[0]);
-                   }
-                   return sequence.nodes.map(function(node) { return node.loc; });
-               };
-
-               outers = outers.map(sequenceToLineString);
-               inners = inners.map(sequenceToLineString);
-
-               var result = outers.map(function(o) {
-                   // Heuristic for detecting counterclockwise winding order. Assumes
-                   // that OpenStreetMap polygons are not hemisphere-spanning.
-                   return [d3_geoArea({ type: 'Polygon', coordinates: [o] }) > 2 * Math.PI ? o.reverse() : o];
-               });
-
-               function findOuter(inner) {
-                   var o, outer;
-
-                   for (o = 0; o < outers.length; o++) {
-                       outer = outers[o];
-                       if (geoPolygonContainsPolygon(outer, inner))
-                           { return o; }
-                   }
-
-                   for (o = 0; o < outers.length; o++) {
-                       outer = outers[o];
-                       if (geoPolygonIntersectsPolygon(outer, inner, false))
-                           { return o; }
-                   }
-               }
-
-               for (var i = 0; i < inners.length; i++) {
-                   var inner = inners[i];
-
-                   if (d3_geoArea({ type: 'Polygon', coordinates: [inner] }) < 2 * Math.PI) {
-                       inner = inner.reverse();
-                   }
-
-                   var o = findOuter(inners[i]);
-                   if (o !== undefined) {
-                       result[o].push(inners[i]);
-                   } else {
-                       result.push([inners[i]]); // Invalid geometry
-                   }
-               }
-
-               return result;
-           }
-       });
-
-       var QAItem = function QAItem(loc, service, itemType, id, props) {
-         // Store required properties
-         this.loc = loc;
-         this.service = service.title;
-         this.itemType = itemType;
-
-         // All issues must have an ID for selection, use generic if none specified
-         this.id = id ? id : ("" + (QAItem.id()));
-
-         this.update(props);
-
-         // Some QA services have marker icons to differentiate issues
-         if (service && typeof service.getIcon === 'function') {
-           this.icon = service.getIcon(itemType);
-         }
-
-         return this;
-       };
-
-       QAItem.prototype.update = function update (props) {
-           var this$1 = this;
-
-         // You can't override this inital information
-         var ref = this;
-           var loc = ref.loc;
-           var service = ref.service;
-           var itemType = ref.itemType;
-           var id = ref.id;
-
-         Object.keys(props).forEach(function (prop) { return this$1[prop] = props[prop]; });
-
-         this.loc = loc;
-         this.service = service;
-         this.itemType = itemType;
-         this.id = id;
-
-         return this;
-       };
-
-       // Generic handling for newly created QAItems
-       QAItem.id = function id () {
-         return this.nextId--;
-       };
-       QAItem.nextId = -1;
-
-       // Split a way at the given node.
-       //
-       // Optionally, split only the given ways, if multiple ways share
-       // the given node.
-       //
-       // This is the inverse of `iD.actionJoin`.
-       //
-       // For testing convenience, accepts an ID to assign to the new way.
-       // Normally, this will be undefined and the way will automatically
-       // be assigned a new ID.
-       //
-       // Reference:
-       //   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/SplitWayAction.as
-       //
-       function actionSplit(nodeId, newWayIds) {
-           var _wayIDs;
-
-           // The IDs of the ways actually created by running this action
-           var createdWayIDs = [];
-
-           // If the way is closed, we need to search for a partner node
-           // to split the way at.
-           //
-           // The following looks for a node that is both far away from
-           // the initial node in terms of way segment length and nearby
-           // in terms of beeline-distance. This assures that areas get
-           // split on the most "natural" points (independent of the number
-           // of nodes).
-           // For example: bone-shaped areas get split across their waist
-           // line, circles across the diameter.
-           function splitArea(nodes, idxA, graph) {
-               var lengths = new Array(nodes.length);
-               var length;
-               var i;
-               var best = 0;
-               var idxB;
-
-               function wrap(index) {
-                   return utilWrap(index, nodes.length);
-               }
-
-               function dist(nA, nB) {
-                   var locA = graph.entity(nA).loc;
-                   var locB = graph.entity(nB).loc;
-                   var epsilon = 1e-6;
-                   return (locA && locB) ? geoSphericalDistance(locA, locB) : epsilon;
-               }
-
-               // calculate lengths
-               length = 0;
-               for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
-                   length += dist(nodes[i], nodes[wrap(i - 1)]);
-                   lengths[i] = length;
-               }
-
-               length = 0;
-               for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
-                   length += dist(nodes[i], nodes[wrap(i + 1)]);
-                   if (length < lengths[i]) {
-                       lengths[i] = length;
-                   }
-               }
-
-               // determine best opposite node to split
-               for (i = 0; i < nodes.length; i++) {
-                   var cost = lengths[i] / dist(nodes[idxA], nodes[i]);
-                   if (cost > best) {
-                       idxB = i;
-                       best = cost;
-                   }
-               }
-
-               return idxB;
-           }
-
-
-           function split(graph, wayA, newWayId) {
-               var wayB = osmWay({ id: newWayId, tags: wayA.tags });   // `wayB` is the NEW way
-               var origNodes = wayA.nodes.slice();
-               var nodesA;
-               var nodesB;
-               var isArea = wayA.isArea();
-               var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
-
-               if (wayA.isClosed()) {
-                   var nodes = wayA.nodes.slice(0, -1);
-                   var idxA = nodes.indexOf(nodeId);
-                   var idxB = splitArea(nodes, idxA, graph);
-
-                   if (idxB < idxA) {
-                       nodesA = nodes.slice(idxA).concat(nodes.slice(0, idxB + 1));
-                       nodesB = nodes.slice(idxB, idxA + 1);
-                   } else {
-                       nodesA = nodes.slice(idxA, idxB + 1);
-                       nodesB = nodes.slice(idxB).concat(nodes.slice(0, idxA + 1));
-                   }
-               } else {
-                   var idx = wayA.nodes.indexOf(nodeId, 1);
-                   nodesA = wayA.nodes.slice(0, idx + 1);
-                   nodesB = wayA.nodes.slice(idx);
-               }
-
-               wayA = wayA.update({ nodes: nodesA });
-               wayB = wayB.update({ nodes: nodesB });
-
-               graph = graph.replace(wayA);
-               graph = graph.replace(wayB);
-
-               graph.parentRelations(wayA).forEach(function(relation) {
-                   var member;
-
-                   // Turn restrictions - make sure:
-                   // 1. Splitting a FROM/TO way - only `wayA` OR `wayB` remains in relation
-                   //    (whichever one is connected to the VIA node/ways)
-                   // 2. Splitting a VIA way - `wayB` remains in relation as a VIA way
-                   if (relation.hasFromViaTo()) {
-                       var f = relation.memberByRole('from');
-                       var v = relation.membersByRole('via');
-                       var t = relation.memberByRole('to');
-                       var i;
-
-                       // 1. split a FROM/TO
-                       if (f.id === wayA.id || t.id === wayA.id) {
-                           var keepB = false;
-                           if (v.length === 1 && v[0].type === 'node') {   // check via node
-                               keepB = wayB.contains(v[0].id);
-                           } else {                                        // check via way(s)
-                               for (i = 0; i < v.length; i++) {
-                                   if (v[i].type === 'way') {
-                                       var wayVia = graph.hasEntity(v[i].id);
-                                       if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
-                                           keepB = true;
-                                           break;
-                                       }
-                                   }
-                               }
-                           }
-
-                           if (keepB) {
-                               relation = relation.replaceMember(wayA, wayB);
-                               graph = graph.replace(relation);
-                           }
-
-                       // 2. split a VIA
-                       } else {
-                           for (i = 0; i < v.length; i++) {
-                               if (v[i].type === 'way' && v[i].id === wayA.id) {
-                                   member = {
-                                       id: wayB.id,
-                                       type: 'way',
-                                       role: 'via'
-                                   };
-                                   graph = actionAddMember(relation.id, member, v[i].index + 1)(graph);
-                                   break;
-                               }
-                           }
-                       }
-
-                   // All other relations (Routes, Multipolygons, etc):
-                   // 1. Both `wayA` and `wayB` remain in the relation
-                   // 2. But must be inserted as a pair (see `actionAddMember` for details)
-                   } else {
-                       if (relation === isOuter) {
-                           graph = graph.replace(relation.mergeTags(wayA.tags));
-                           graph = graph.replace(wayA.update({ tags: {} }));
-                           graph = graph.replace(wayB.update({ tags: {} }));
-                       }
-
-                       member = {
-                           id: wayB.id,
-                           type: 'way',
-                           role: relation.memberById(wayA.id).role
-                       };
-
-                       var insertPair = {
-                           originalID: wayA.id,
-                           insertedID: wayB.id,
-                           nodes: origNodes
-                       };
-
-                       graph = actionAddMember(relation.id, member, undefined, insertPair)(graph);
-                   }
-               });
-
-               if (!isOuter && isArea) {
-                   var multipolygon = osmRelation({
-                       tags: Object.assign({}, wayA.tags, { type: 'multipolygon' }),
-                       members: [
-                           { id: wayA.id, role: 'outer', type: 'way' },
-                           { id: wayB.id, role: 'outer', type: 'way' }
-                       ]
-                   });
-
-                   graph = graph.replace(multipolygon);
-                   graph = graph.replace(wayA.update({ tags: {} }));
-                   graph = graph.replace(wayB.update({ tags: {} }));
-               }
-
-               createdWayIDs.push(wayB.id);
-
-               return graph;
-           }
-
-           var action = function(graph) {
-               var candidates = action.ways(graph);
-               createdWayIDs = [];
-               for (var i = 0; i < candidates.length; i++) {
-                   graph = split(graph, candidates[i], newWayIds && newWayIds[i]);
-               }
-               return graph;
-           };
-
-           action.getCreatedWayIDs = function() {
-               return createdWayIDs;
-           };
-
-           action.ways = function(graph) {
-               var node = graph.entity(nodeId);
-               var parents = graph.parentWays(node);
-               var hasLines = parents.some(function(parent) {
-                   return parent.geometry(graph) === 'line';
-               });
-
-               return parents.filter(function(parent) {
-                   if (_wayIDs && _wayIDs.indexOf(parent.id) === -1)
-                       { return false; }
-
-                   if (!_wayIDs && hasLines && parent.geometry(graph) !== 'line')
-                       { return false; }
-
-                   if (parent.isClosed()) {
-                       return true;
-                   }
-
-                   for (var i = 1; i < parent.nodes.length - 1; i++) {
-                       if (parent.nodes[i] === nodeId) {
-                           return true;
-                       }
-                   }
-
-                   return false;
-               });
-           };
-
-
-           action.disabled = function(graph) {
-               var candidates = action.ways(graph);
-               if (candidates.length === 0 || (_wayIDs && _wayIDs.length !== candidates.length)) {
-                   return 'not_eligible';
-               }
-           };
-
-
-           action.limitWays = function(val) {
-               if (!arguments.length) { return _wayIDs; }
-               _wayIDs = val;
-               return action;
-           };
-
-
-           return action;
+       function propertyConstant(name, value) {
+         return function () {
+           this[name] = value;
+         };

        }
 
        }
 

-       function coreGraph(other, mutable) {
-           if (!(this instanceof coreGraph)) { return new coreGraph(other, mutable); }
-
-           if (other instanceof coreGraph) {
-               var base = other.base();
-               this.entities = Object.assign(Object.create(base.entities), other.entities);
-               this._parentWays = Object.assign(Object.create(base.parentWays), other._parentWays);
-               this._parentRels = Object.assign(Object.create(base.parentRels), other._parentRels);
-
-           } else {
-               this.entities = Object.create({});
-               this._parentWays = Object.create({});
-               this._parentRels = Object.create({});
-               this.rebase(other || [], [this]);
-           }
-
-           this.transients = {};
-           this._childNodes = {};
-           this.frozen = !mutable;
+       function propertyFunction(name, value) {
+         return function () {
+           var v = value.apply(this, arguments);
+           if (v == null) delete this[name];else this[name] = v;
+         };

        }
 
        }
 

+       function selection_property (name, value) {
+         return arguments.length > 1 ? this.each((value == null ? propertyRemove : typeof value === "function" ? propertyFunction : propertyConstant)(name, value)) : this.node()[name];
+       }

 
 

-       coreGraph.prototype = {
-
-           hasEntity: function(id) {
-               return this.entities[id];
-           },
-
-
-           entity: function(id) {
-               var entity = this.entities[id];
-
-               //https://github.com/openstreetmap/iD/issues/3973#issuecomment-307052376
-               if (!entity) {
-                   entity = this.entities.__proto__[id];  // eslint-disable-line no-proto
-               }
-
-               if (!entity) {
-                   throw new Error('entity ' + id + ' not found');
-               }
-               return entity;
-           },
-
-
-           geometry: function(id) {
-               return this.entity(id).geometry(this);
-           },
-
-
-           transient: function(entity, key, fn) {
-               var id = entity.id;
-               var transients = this.transients[id] || (this.transients[id] = {});
-
-               if (transients[key] !== undefined) {
-                   return transients[key];
-               }
-
-               transients[key] = fn.call(entity);
-
-               return transients[key];
-           },
-
-
-           parentWays: function(entity) {
-               var parents = this._parentWays[entity.id];
-               var result = [];
-               if (parents) {
-                   parents.forEach(function(id) {
-                       result.push(this.entity(id));
-                   }, this);
-               }
-               return result;
-           },
-
-
-           isPoi: function(entity) {
-               var parents = this._parentWays[entity.id];
-               return !parents || parents.size === 0;
-           },
-
-
-           isShared: function(entity) {
-               var parents = this._parentWays[entity.id];
-               return parents && parents.size > 1;
-           },
-
-
-           parentRelations: function(entity) {
-               var parents = this._parentRels[entity.id];
-               var result = [];
-               if (parents) {
-                   parents.forEach(function(id) {
-                       result.push(this.entity(id));
-                   }, this);
-               }
-               return result;
-           },
-
-           parentMultipolygons: function(entity) {
-               return this.parentRelations(entity).filter(function(relation) {
-                   return relation.isMultipolygon();
-               });
-           },
-
-
-           childNodes: function(entity) {
-               if (this._childNodes[entity.id]) { return this._childNodes[entity.id]; }
-               if (!entity.nodes) { return []; }
-
-               var nodes = [];
-               for (var i = 0; i < entity.nodes.length; i++) {
-                   nodes[i] = this.entity(entity.nodes[i]);
-               }
-
-               this._childNodes[entity.id] = nodes;
-               return this._childNodes[entity.id];
-           },
-
-
-           base: function() {
-               return {
-                   'entities': Object.getPrototypeOf(this.entities),
-                   'parentWays': Object.getPrototypeOf(this._parentWays),
-                   'parentRels': Object.getPrototypeOf(this._parentRels)
-               };
-           },
-
-
-           // Unlike other graph methods, rebase mutates in place. This is because it
-           // is used only during the history operation that merges newly downloaded
-           // data into each state. To external consumers, it should appear as if the
-           // graph always contained the newly downloaded data.
-           rebase: function(entities, stack, force) {
-               var base = this.base();
-               var i, j, k, id;
-
-               for (i = 0; i < entities.length; i++) {
-                   var entity = entities[i];
-
-                   if (!entity.visible || (!force && base.entities[entity.id]))
-                       { continue; }
-
-                   // Merging data into the base graph
-                   base.entities[entity.id] = entity;
-                   this._updateCalculated(undefined, entity, base.parentWays, base.parentRels);
-
-                   // Restore provisionally-deleted nodes that are discovered to have an extant parent
-                   if (entity.type === 'way') {
-                       for (j = 0; j < entity.nodes.length; j++) {
-                           id = entity.nodes[j];
-                           for (k = 1; k < stack.length; k++) {
-                               var ents = stack[k].entities;
-                               if (ents.hasOwnProperty(id) && ents[id] === undefined) {
-                                   delete ents[id];
-                               }
-                           }
-                       }
-                   }
-               }
-
-               for (i = 0; i < stack.length; i++) {
-                   stack[i]._updateRebased();
-               }
-           },
-
-
-           _updateRebased: function() {
-               var base = this.base();
-
-               Object.keys(this._parentWays).forEach(function(child) {
-                   if (base.parentWays[child]) {
-                       base.parentWays[child].forEach(function(id) {
-                           if (!this.entities.hasOwnProperty(id)) {
-                               this._parentWays[child].add(id);
-                           }
-                       }, this);
-                   }
-               }, this);
-
-               Object.keys(this._parentRels).forEach(function(child) {
-                   if (base.parentRels[child]) {
-                       base.parentRels[child].forEach(function(id) {
-                           if (!this.entities.hasOwnProperty(id)) {
-                               this._parentRels[child].add(id);
-                           }
-                       }, this);
-                   }
-               }, this);
-
-               this.transients = {};
-
-               // this._childNodes is not updated, under the assumption that
-               // ways are always downloaded with their child nodes.
-           },
-
-
-           // Updates calculated properties (parentWays, parentRels) for the specified change
-           _updateCalculated: function(oldentity, entity, parentWays, parentRels) {
-               parentWays = parentWays || this._parentWays;
-               parentRels = parentRels || this._parentRels;
-
-               var type = entity && entity.type || oldentity && oldentity.type;
-               var removed, added, i;
-
-               if (type === 'way') {   // Update parentWays
-                   if (oldentity && entity) {
-                       removed = utilArrayDifference(oldentity.nodes, entity.nodes);
-                       added = utilArrayDifference(entity.nodes, oldentity.nodes);
-                   } else if (oldentity) {
-                       removed = oldentity.nodes;
-                       added = [];
-                   } else if (entity) {
-                       removed = [];
-                       added = entity.nodes;
-                   }
-                   for (i = 0; i < removed.length; i++) {
-                       // make a copy of prototype property, store as own property, and update..
-                       parentWays[removed[i]] = new Set(parentWays[removed[i]]);
-                       parentWays[removed[i]].delete(oldentity.id);
-                   }
-                   for (i = 0; i < added.length; i++) {
-                       // make a copy of prototype property, store as own property, and update..
-                       parentWays[added[i]] = new Set(parentWays[added[i]]);
-                       parentWays[added[i]].add(entity.id);
-                   }
-
-               } else if (type === 'relation') {   // Update parentRels
-
-                   // diff only on the IDs since the same entity can be a member multiple times with different roles
-                   var oldentityMemberIDs = oldentity ? oldentity.members.map(function(m) { return m.id; }) : [];
-                   var entityMemberIDs = entity ? entity.members.map(function(m) { return m.id; }) : [];
-
-                   if (oldentity && entity) {
-                       removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
-                       added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
-                   } else if (oldentity) {
-                       removed = oldentityMemberIDs;
-                       added = [];
-                   } else if (entity) {
-                       removed = [];
-                       added = entityMemberIDs;
-                   }
-                   for (i = 0; i < removed.length; i++) {
-                       // make a copy of prototype property, store as own property, and update..
-                       parentRels[removed[i]] = new Set(parentRels[removed[i]]);
-                       parentRels[removed[i]].delete(oldentity.id);
-                   }
-                   for (i = 0; i < added.length; i++) {
-                       // make a copy of prototype property, store as own property, and update..
-                       parentRels[added[i]] = new Set(parentRels[added[i]]);
-                       parentRels[added[i]].add(entity.id);
-                   }
-               }
-           },
-
-
-           replace: function(entity) {
-               if (this.entities[entity.id] === entity) { return this; }
-
-               return this.update(function() {
-                   this._updateCalculated(this.entities[entity.id], entity);
-                   this.entities[entity.id] = entity;
-               });
-           },
-
-
-           remove: function(entity) {
-               return this.update(function() {
-                   this._updateCalculated(entity, undefined);
-                   this.entities[entity.id] = undefined;
-               });
-           },
+       function classArray(string) {
+         return string.trim().split(/^|\s+/);
+       }

 
 

+       function classList(node) {
+         return node.classList || new ClassList(node);
+       }

 
 

-           revert: function(id) {
-               var baseEntity = this.base().entities[id];
-               var headEntity = this.entities[id];
-               if (headEntity === baseEntity) { return this; }
+       function ClassList(node) {
+         this._node = node;
+         this._names = classArray(node.getAttribute("class") || "");
+       }

 
 

-               return this.update(function() {
-                   this._updateCalculated(headEntity, baseEntity);
-                   delete this.entities[id];
-               });
-           },
+       ClassList.prototype = {
+         add: function add(name) {
+           var i = this._names.indexOf(name);

 
 

+           if (i < 0) {
+             this._names.push(name);

 
 

-           update: function() {
-               var arguments$1 = arguments;
+             this._node.setAttribute("class", this._names.join(" "));
+           }
+         },
+         remove: function remove(name) {
+           var i = this._names.indexOf(name);

 
 

-               var graph = this.frozen ? coreGraph(this, true) : this;
-               for (var i = 0; i < arguments.length; i++) {
-                   arguments$1[i].call(graph, graph);
-               }
+           if (i >= 0) {
+             this._names.splice(i, 1);

 
 

-               if (this.frozen) { graph.frozen = true; }
+             this._node.setAttribute("class", this._names.join(" "));
+           }
+         },
+         contains: function contains(name) {
+           return this._names.indexOf(name) >= 0;
+         }
+       };

 
 

-               return graph;
-           },
+       function classedAdd(node, names) {
+         var list = classList(node),
+             i = -1,
+             n = names.length;

 
 

+         while (++i < n) {
+           list.add(names[i]);
+         }
+       }

 
 

-           // Obliterates any existing entities
-           load: function(entities) {
-               var base = this.base();
-               this.entities = Object.create(base.entities);
+       function classedRemove(node, names) {
+         var list = classList(node),
+             i = -1,
+             n = names.length;

 
 

-               for (var i in entities) {
-                   this.entities[i] = entities[i];
-                   this._updateCalculated(base.entities[i], this.entities[i]);
-               }
+         while (++i < n) {
+           list.remove(names[i]);
+         }
+       }

 
 

-               return this;
-           }
-       };
+       function classedTrue(names) {
+         return function () {
+           classedAdd(this, names);
+         };
+       }

 
 

-       function osmTurn(turn) {
-           if (!(this instanceof osmTurn)) {
-               return new osmTurn(turn);
-           }
-           Object.assign(this, turn);
+       function classedFalse(names) {
+         return function () {
+           classedRemove(this, names);
+         };

        }
 
        }
 

+       function classedFunction(names, value) {
+         return function () {
+           (value.apply(this, arguments) ? classedAdd : classedRemove)(this, names);
+         };
+       }

 
 

-       function osmIntersection(graph, startVertexId, maxDistance) {
-           maxDistance = maxDistance || 30;    // in meters
-           var vgraph = coreGraph();           // virtual graph
-           var i, j, k;
+       function selection_classed (name, value) {
+         var names = classArray(name + "");

 
 

+         if (arguments.length < 2) {
+           var list = classList(this.node()),
+               i = -1,
+               n = names.length;

 
 

-           function memberOfRestriction(entity) {
-               return graph.parentRelations(entity)
-                   .some(function(r) { return r.isRestriction(); });
-           }
-
-           function isRoad(way) {
-               if (way.isArea() || way.isDegenerate()) { return false; }
-               var roads = {
-                   'motorway': true,
-                   'motorway_link': true,
-                   'trunk': true,
-                   'trunk_link': true,
-                   'primary': true,
-                   'primary_link': true,
-                   'secondary': true,
-                   'secondary_link': true,
-                   'tertiary': true,
-                   'tertiary_link': true,
-                   'residential': true,
-                   'unclassified': true,
-                   'living_street': true,
-                   'service': true,
-                   'road': true,
-                   'track': true
-               };
-               return roads[way.tags.highway];
+           while (++i < n) {
+             if (!list.contains(names[i])) return false;

            }
 
            }
 

+           return true;
+         }

 
 

-           var startNode = graph.entity(startVertexId);
-           var checkVertices = [startNode];
-           var checkWays;
-           var vertices = [];
-           var vertexIds = [];
-           var vertex;
-           var ways = [];
-           var wayIds = [];
-           var way;
-           var nodes = [];
-           var node;
-           var parents = [];
-           var parent;
-
-           // `actions` will store whatever actions must be performed to satisfy
-           // preconditions for adding a turn restriction to this intersection.
-           //  - Remove any existing degenerate turn restrictions (missing from/to, etc)
-           //  - Reverse oneways so that they are drawn in the forward direction
-           //  - Split ways on key vertices
-           var actions = [];
-
+         return this.each((typeof value === "function" ? classedFunction : value ? classedTrue : classedFalse)(names, value));
+       }

 
 

-           // STEP 1:  walk the graph outwards from starting vertex to search
-           //  for more key vertices and ways to include in the intersection..
-
-           while (checkVertices.length) {
-               vertex = checkVertices.pop();
-
-               // check this vertex for parent ways that are roads
-               checkWays = graph.parentWays(vertex);
-               var hasWays = false;
-               for (i = 0; i < checkWays.length; i++) {
-                   way = checkWays[i];
-                   if (!isRoad(way) && !memberOfRestriction(way)) { continue; }
-
-                   ways.push(way);   // it's a road, or it's already in a turn restriction
-                   hasWays = true;
-
-                   // check the way's children for more key vertices
-                   nodes = utilArrayUniq(graph.childNodes(way));
-                   for (j = 0; j < nodes.length; j++) {
-                       node = nodes[j];
-                       if (node === vertex) { continue; }                                           // same thing
-                       if (vertices.indexOf(node) !== -1) { continue; }                             // seen it already
-                       if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) { continue; }   // too far from start
-
-                       // a key vertex will have parents that are also roads
-                       var hasParents = false;
-                       parents = graph.parentWays(node);
-                       for (k = 0; k < parents.length; k++) {
-                           parent = parents[k];
-                           if (parent === way) { continue; }                 // same thing
-                           if (ways.indexOf(parent) !== -1) { continue; }    // seen it already
-                           if (!isRoad(parent)) { continue; }                // not a road
-                           hasParents = true;
-                           break;
-                       }
+       function textRemove() {
+         this.textContent = "";
+       }

 
 

-                       if (hasParents) {
-                           checkVertices.push(node);
-                       }
-                   }
-               }
+       function textConstant$1(value) {
+         return function () {
+           this.textContent = value;
+         };
+       }

 
 

-               if (hasWays) {
-                   vertices.push(vertex);
-               }
-           }
+       function textFunction$1(value) {
+         return function () {
+           var v = value.apply(this, arguments);
+           this.textContent = v == null ? "" : v;
+         };
+       }

 
 

-           vertices = utilArrayUniq(vertices);
-           ways = utilArrayUniq(ways);
+       function selection_text (value) {
+         return arguments.length ? this.each(value == null ? textRemove : (typeof value === "function" ? textFunction$1 : textConstant$1)(value)) : this.node().textContent;
+       }

 
 

+       function htmlRemove() {
+         this.innerHTML = "";
+       }

 
 

-           // STEP 2:  Build a virtual graph containing only the entities in the intersection..
-           // Everything done after this step should act on the virtual graph
-           // Any actions that must be performed later to the main graph go in `actions` array
-           ways.forEach(function(way) {
-               graph.childNodes(way).forEach(function(node) {
-                   vgraph = vgraph.replace(node);
-               });
+       function htmlConstant(value) {
+         return function () {
+           this.innerHTML = value;
+         };
+       }

 
 

-               vgraph = vgraph.replace(way);
+       function htmlFunction(value) {
+         return function () {
+           var v = value.apply(this, arguments);
+           this.innerHTML = v == null ? "" : v;
+         };
+       }

 
 

-               graph.parentRelations(way).forEach(function(relation) {
-                   if (relation.isRestriction()) {
-                       if (relation.isValidRestriction(graph)) {
-                           vgraph = vgraph.replace(relation);
-                       } else if (relation.isComplete(graph)) {
-                           actions.push(actionDeleteRelation(relation.id));
-                       }
-                   }
-               });
-           });
+       function selection_html (value) {
+         return arguments.length ? this.each(value == null ? htmlRemove : (typeof value === "function" ? htmlFunction : htmlConstant)(value)) : this.node().innerHTML;
+       }

 
 

+       function raise() {
+         if (this.nextSibling) this.parentNode.appendChild(this);
+       }

 
 

-           // STEP 3:  Force all oneways to be drawn in the forward direction
-           ways.forEach(function(w) {
-               var way = vgraph.entity(w.id);
-               if (way.tags.oneway === '-1') {
-                   var action = actionReverse(way.id, { reverseOneway: true });
-                   actions.push(action);
-                   vgraph = action(vgraph);
-               }
-           });
+       function selection_raise () {
+         return this.each(raise);
+       }

 
 

+       function lower() {
+         if (this.previousSibling) this.parentNode.insertBefore(this, this.parentNode.firstChild);
+       }

 
 

-           // STEP 4:  Split ways on key vertices
-           var origCount = osmEntity.id.next.way;
-           vertices.forEach(function(v) {
-               // This is an odd way to do it, but we need to find all the ways that
-               // will be split here, then split them one at a time to ensure that these
-               // actions can be replayed on the main graph exactly in the same order.
-               // (It is unintuitive, but the order of ways returned from graph.parentWays()
-               // is arbitrary, depending on how the main graph and vgraph were built)
-               var splitAll = actionSplit(v.id);
-               if (!splitAll.disabled(vgraph)) {
-                   splitAll.ways(vgraph).forEach(function(way) {
-                       var splitOne = actionSplit(v.id).limitWays([way.id]);
-                       actions.push(splitOne);
-                       vgraph = splitOne(vgraph);
-                   });
-               }
-           });
+       function selection_lower () {
+         return this.each(lower);
+       }

 
 

-           // In here is where we should also split the intersection at nearby junction.
-           //   for https://github.com/mapbox/iD-internal/issues/31
-           // nearbyVertices.forEach(function(v) {
-           // });
+       function selection_append (name) {
+         var create = typeof name === "function" ? name : creator(name);
+         return this.select(function () {
+           return this.appendChild(create.apply(this, arguments));
+         });
+       }

 
 

-           // Reasons why we reset the way id count here:
-           //  1. Continuity with way ids created by the splits so that we can replay
-           //     these actions later if the user decides to create a turn restriction
-           //  2. Avoids churning way ids just by hovering over a vertex
-           //     and displaying the turn restriction editor
-           osmEntity.id.next.way = origCount;
+       function constantNull() {
+         return null;
+       }

 
 

+       function selection_insert (name, before) {
+         var create = typeof name === "function" ? name : creator(name),
+             select = before == null ? constantNull : typeof before === "function" ? before : selector(before);
+         return this.select(function () {
+           return this.insertBefore(create.apply(this, arguments), select.apply(this, arguments) || null);
+         });
+       }

 
 

-           // STEP 5:  Update arrays to point to vgraph entities
-           vertexIds = vertices.map(function(v) { return v.id; });
-           vertices = [];
-           ways = [];
+       function remove$7() {
+         var parent = this.parentNode;
+         if (parent) parent.removeChild(this);
+       }

 
 

-           vertexIds.forEach(function(id) {
-               var vertex = vgraph.entity(id);
-               var parents = vgraph.parentWays(vertex);
-               vertices.push(vertex);
-               ways = ways.concat(parents);
-           });
+       function selection_remove () {
+         return this.each(remove$7);
+       }

 
 

-           vertices = utilArrayUniq(vertices);
-           ways = utilArrayUniq(ways);
+       function selection_cloneShallow() {
+         var clone = this.cloneNode(false),
+             parent = this.parentNode;
+         return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
+       }

 
 

-           vertexIds = vertices.map(function(v) { return v.id; });
-           wayIds = ways.map(function(w) { return w.id; });
+       function selection_cloneDeep() {
+         var clone = this.cloneNode(true),
+             parent = this.parentNode;
+         return parent ? parent.insertBefore(clone, this.nextSibling) : clone;
+       }

 
 

+       function selection_clone (deep) {
+         return this.select(deep ? selection_cloneDeep : selection_cloneShallow);
+       }

 
 

-           // STEP 6:  Update the ways with some metadata that will be useful for
-           // walking the intersection graph later and rendering turn arrows.
+       function selection_datum (value) {
+         return arguments.length ? this.property("__data__", value) : this.node().__data__;
+       }

 
 

-           function withMetadata(way, vertexIds) {
-               var __oneWay = way.isOneWay();
+       function contextListener(listener) {
+         return function (event) {
+           listener.call(this, event, this.__data__);
+         };
+       }

 
 

-               // which affixes are key vertices?
-               var __first = (vertexIds.indexOf(way.first()) !== -1);
-               var __last = (vertexIds.indexOf(way.last()) !== -1);
+       function parseTypenames(typenames) {
+         return typenames.trim().split(/^|\s+/).map(function (t) {
+           var name = "",
+               i = t.indexOf(".");
+           if (i >= 0) name = t.slice(i + 1), t = t.slice(0, i);
+           return {
+             type: t,
+             name: name
+           };
+         });
+       }

 
 

-               // what roles is this way eligible for?
-               var __via = (__first && __last);
-               var __from = ((__first && !__oneWay) || __last);
-               var __to = (__first || (__last && !__oneWay));
+       function onRemove(typename) {
+         return function () {
+           var on = this.__on;
+           if (!on) return;

 
 

-               return way.update({
-                   __first:  __first,
-                   __last:  __last,
-                   __from:  __from,
-                   __via: __via,
-                   __to:  __to,
-                   __oneWay:  __oneWay
-               });
+           for (var j = 0, i = -1, m = on.length, o; j < m; ++j) {
+             if (o = on[j], (!typename.type || o.type === typename.type) && o.name === typename.name) {
+               this.removeEventListener(o.type, o.listener, o.options);
+             } else {
+               on[++i] = o;
+             }

            }
 
            }
 

-           ways = [];
-           wayIds.forEach(function(id) {
-               var way = withMetadata(vgraph.entity(id), vertexIds);
-               vgraph = vgraph.replace(way);
-               ways.push(way);
-           });
+           if (++i) on.length = i;else delete this.__on;
+         };
+       }

 
 

+       function onAdd(typename, value, options) {
+         return function () {
+           var on = this.__on,
+               o,
+               listener = contextListener(value);
+           if (on) for (var j = 0, m = on.length; j < m; ++j) {
+             if ((o = on[j]).type === typename.type && o.name === typename.name) {
+               this.removeEventListener(o.type, o.listener, o.options);
+               this.addEventListener(o.type, o.listener = listener, o.options = options);
+               o.value = value;
+               return;
+             }
+           }
+           this.addEventListener(typename.type, listener, options);
+           o = {
+             type: typename.type,
+             name: typename.name,
+             value: value,
+             listener: listener,
+             options: options
+           };
+           if (!on) this.__on = [o];else on.push(o);
+         };
+       }

 
 

-           // STEP 7:  Simplify - This is an iterative process where we:
-           //  1. Find trivial vertices with only 2 parents
-           //  2. trim off the leaf way from those vertices and remove from vgraph
+       function selection_on (typename, value, options) {
+         var typenames = parseTypenames(typename + ""),
+             i,
+             n = typenames.length,
+             t;

 
 

-           var keepGoing;
-           var removeWayIds = [];
-           var removeVertexIds = [];
+         if (arguments.length < 2) {
+           var on = this.node().__on;

 
 

-           do {
-               keepGoing = false;
-               checkVertices = vertexIds.slice();
+           if (on) for (var j = 0, m = on.length, o; j < m; ++j) {
+             for (i = 0, o = on[j]; i < n; ++i) {
+               if ((t = typenames[i]).type === o.type && t.name === o.name) {
+                 return o.value;
+               }
+             }
+           }
+           return;
+         }

 
 

-               for (i = 0; i < checkVertices.length; i++) {
-                   var vertexId = checkVertices[i];
-                   vertex = vgraph.hasEntity(vertexId);
+         on = value ? onAdd : onRemove;

 
 

-                   if (!vertex) {
-                       if (vertexIds.indexOf(vertexId) !== -1) {
-                           vertexIds.splice(vertexIds.indexOf(vertexId), 1);   // stop checking this one
-                       }
-                       removeVertexIds.push(vertexId);
-                       continue;
-                   }
+         for (i = 0; i < n; ++i) {
+           this.each(on(typenames[i], value, options));
+         }

 
 

-                   parents = vgraph.parentWays(vertex);
-                   if (parents.length < 3) {
-                       if (vertexIds.indexOf(vertexId) !== -1) {
-                           vertexIds.splice(vertexIds.indexOf(vertexId), 1);   // stop checking this one
-                       }
-                   }
+         return this;
+       }

 
 

-                   if (parents.length === 2) {     // vertex with 2 parents is trivial
-                       var a = parents[0];
-                       var b = parents[1];
-                       var aIsLeaf = a && !a.__via;
-                       var bIsLeaf = b && !b.__via;
-                       var leaf, survivor;
-
-                       if (aIsLeaf && !bIsLeaf) {
-                           leaf = a;
-                           survivor = b;
-                       } else if (!aIsLeaf && bIsLeaf) {
-                           leaf = b;
-                           survivor = a;
-                       }
+       function dispatchEvent(node, type, params) {
+         var window = defaultView(node),
+             event = window.CustomEvent;

 
 

-                       if (leaf && survivor) {
-                           survivor = withMetadata(survivor, vertexIds);      // update survivor way
-                           vgraph = vgraph.replace(survivor).remove(leaf);    // update graph
-                           removeWayIds.push(leaf.id);
-                           keepGoing = true;
-                       }
-                   }
+         if (typeof event === "function") {
+           event = new event(type, params);
+         } else {
+           event = window.document.createEvent("Event");
+           if (params) event.initEvent(type, params.bubbles, params.cancelable), event.detail = params.detail;else event.initEvent(type, false, false);
+         }

 
 

-                   parents = vgraph.parentWays(vertex);
+         node.dispatchEvent(event);
+       }

 
 

-                   if (parents.length < 2) {     // vertex is no longer a key vertex
-                       if (vertexIds.indexOf(vertexId) !== -1) {
-                           vertexIds.splice(vertexIds.indexOf(vertexId), 1);   // stop checking this one
-                       }
-                       removeVertexIds.push(vertexId);
-                       keepGoing = true;
-                   }
+       function dispatchConstant(type, params) {
+         return function () {
+           return dispatchEvent(this, type, params);
+         };
+       }

 
 

-                   if (parents.length < 1) {     // vertex is no longer attached to anything
-                       vgraph = vgraph.remove(vertex);
-                   }
+       function dispatchFunction(type, params) {
+         return function () {
+           return dispatchEvent(this, type, params.apply(this, arguments));
+         };
+       }

 
 

-               }
-           } while (keepGoing);
+       function selection_dispatch (type, params) {
+         return this.each((typeof params === "function" ? dispatchFunction : dispatchConstant)(type, params));
+       }

 
 

+       var _marked$1 = /*#__PURE__*/regeneratorRuntime.mark(_callee);

 
 

-           vertices = vertices
-               .filter(function(vertex) { return removeVertexIds.indexOf(vertex.id) === -1; })
-               .map(function(vertex) { return vgraph.entity(vertex.id); });
-           ways = ways
-               .filter(function(way) { return removeWayIds.indexOf(way.id) === -1; })
-               .map(function(way) { return vgraph.entity(way.id); });
+       function _callee() {
+         var groups, j, m, group, i, n, node;
+         return regeneratorRuntime.wrap(function _callee$(_context) {
+           while (1) {
+             switch (_context.prev = _context.next) {
+               case 0:
+                 groups = this._groups, j = 0, m = groups.length;

 
 

+               case 1:
+                 if (!(j < m)) {
+                   _context.next = 13;
+                   break;
+                 }

 
 

-           // OK!  Here is our intersection..
-           var intersection = {
-               graph: vgraph,
-               actions: actions,
-               vertices: vertices,
-               ways: ways,
-           };
+                 group = groups[j], i = 0, n = group.length;

 
 

+               case 3:
+                 if (!(i < n)) {
+                   _context.next = 10;
+                   break;
+                 }

 
 

+                 if (!(node = group[i])) {
+                   _context.next = 7;
+                   break;
+                 }

 
 

-           // Get all the valid turns through this intersection given a starting way id.
-           // This operates on the virtual graph for everything.
-           //
-           // Basically, walk through all possible paths from starting way,
-           //   honoring the existing turn restrictions as we go (watch out for loops!)
-           //
-           // For each path found, generate and return a `osmTurn` datastructure.
-           //
-           intersection.turns = function(fromWayId, maxViaWay) {
-               if (!fromWayId) { return []; }
-               if (!maxViaWay) { maxViaWay = 0; }
-
-               var vgraph = intersection.graph;
-               var keyVertexIds = intersection.vertices.map(function(v) { return v.id; });
-
-               var start = vgraph.entity(fromWayId);
-               if (!start || !(start.__from || start.__via)) { return []; }
-
-               // maxViaWay=0   from-*-to              (0 vias)
-               // maxViaWay=1   from-*-via-*-to        (1 via max)
-               // maxViaWay=2   from-*-via-*-via-*-to  (2 vias max)
-               var maxPathLength = (maxViaWay * 2) + 3;
-               var turns = [];
-
-               step(start);
-               return turns;
-
-
-               // traverse the intersection graph and find all the valid paths
-               function step(entity, currPath, currRestrictions, matchedRestriction) {
-                   currPath = (currPath || []).slice();  // shallow copy
-                   if (currPath.length >= maxPathLength) { return; }
-                   currPath.push(entity.id);
-                   currRestrictions = (currRestrictions || []).slice();  // shallow copy
-                   var i, j;
-
-                   if (entity.type === 'node') {
-                       var parents = vgraph.parentWays(entity);
-                       var nextWays = [];
-
-                       // which ways can we step into?
-                       for (i = 0; i < parents.length; i++) {
-                           var way = parents[i];
-
-                           // if next way is a oneway incoming to this vertex, skip
-                           if (way.__oneWay && way.nodes[0] !== entity.id) { continue; }
-
-                           // if we have seen it before (allowing for an initial u-turn), skip
-                           if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) { continue; }
-
-                           // Check all "current" restrictions (where we've already walked the `FROM`)
-                           var restrict = undefined;
-                           for (j = 0; j < currRestrictions.length; j++) {
-                               var restriction = currRestrictions[j];
-                               var f = restriction.memberByRole('from');
-                               var v = restriction.membersByRole('via');
-                               var t = restriction.memberByRole('to');
-                               var isOnly = /^only_/.test(restriction.tags.restriction);
-
-                               // Does the current path match this turn restriction?
-                               var matchesFrom = (f.id === fromWayId);
-                               var matchesViaTo = false;
-                               var isAlongOnlyPath = false;
-
-                               if (t.id === way.id) {     // match TO
-
-                                   if (v.length === 1 && v[0].type === 'node') {    // match VIA node
-                                       matchesViaTo = (v[0].id === entity.id && (
-                                           (matchesFrom && currPath.length === 2) ||
-                                           (!matchesFrom && currPath.length > 2)
-                                       ));
-
-                                   } else {                                         // match all VIA ways
-                                       var pathVias = [];
-                                       for (k = 2; k < currPath.length; k +=2 ) {   // k = 2 skips FROM
-                                           pathVias.push(currPath[k]);              // (path goes way-node-way...)
-                                       }
-                                       var restrictionVias = [];
-                                       for (k = 0; k < v.length; k++) {
-                                           if (v[k].type === 'way') {
-                                               restrictionVias.push(v[k].id);
-                                           }
-                                       }
-                                       var diff = utilArrayDifference(pathVias, restrictionVias);
-                                       matchesViaTo = !diff.length;
-                                   }
-
-                               } else if (isOnly) {
-                                   for (k = 0; k < v.length; k++) {
-                                       // way doesn't match TO, but is one of the via ways along the path of an "only"
-                                       if (v[k].type === 'way' && v[k].id === way.id) {
-                                           isAlongOnlyPath = true;
-                                           break;
-                                       }
-                                   }
-                               }
-
-                               if (matchesViaTo) {
-                                   if (isOnly) {
-                                       restrict = { id: restriction.id, direct: matchesFrom, from: f.id, only: true, end: true };
-                                   } else {
-                                       restrict = { id: restriction.id, direct: matchesFrom, from: f.id, no: true, end: true };
-                                   }
-                               } else {    // indirect - caused by a different nearby restriction
-                                   if (isAlongOnlyPath) {
-                                       restrict = { id: restriction.id, direct: false, from: f.id, only: true, end: false };
-                                   } else if (isOnly) {
-                                       restrict = { id: restriction.id, direct: false, from: f.id, no: true, end: true };
-                                   }
-                               }
-
-                               // stop looking if we find a "direct" restriction (matching FROM, VIA, TO)
-                               if (restrict && restrict.direct)
-                                   { break; }
-                           }
+                 _context.next = 7;
+                 return node;

 
 

-                           nextWays.push({ way: way, restrict: restrict });
-                       }
+               case 7:
+                 ++i;
+                 _context.next = 3;
+                 break;

 
 

-                       nextWays.forEach(function(nextWay) {
-                           step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
-                       });
+               case 10:
+                 ++j;
+                 _context.next = 1;
+                 break;

 
 

+               case 13:
+               case "end":
+                 return _context.stop();
+             }
+           }
+         }, _marked$1, this);
+       }

 
 

-                   } else {  // entity.type === 'way'
-                       if (currPath.length >= 3) {     // this is a "complete" path..
-                           var turnPath = currPath.slice();   // shallow copy
+       var root$1 = [null];
+       function Selection$1(groups, parents) {
+         this._groups = groups;
+         this._parents = parents;
+       }

 
 

-                           // an indirect restriction - only include the partial path (starting at FROM)
-                           if (matchedRestriction && matchedRestriction.direct === false) {
-                               for (i = 0; i < turnPath.length; i++) {
-                                   if (turnPath[i] === matchedRestriction.from) {
-                                       turnPath = turnPath.slice(i);
-                                       break;
-                                   }
-                               }
-                           }
+       function selection() {
+         return new Selection$1([[document.documentElement]], root$1);
+       }

 
 

-                           var turn = pathToTurn(turnPath);
-                           if (turn) {
-                               if (matchedRestriction) {
-                                   turn.restrictionID = matchedRestriction.id;
-                                   turn.no = matchedRestriction.no;
-                                   turn.only = matchedRestriction.only;
-                                   turn.direct = matchedRestriction.direct;
-                               }
-                               turns.push(osmTurn(turn));
-                           }
+       function selection_selection() {
+         return this;
+       }

 
 

-                           if (currPath[0] === currPath[2]) { return; }   // if we made a u-turn - stop here
-                       }
+       Selection$1.prototype = selection.prototype = _defineProperty({
+         constructor: Selection$1,
+         select: selection_select,
+         selectAll: selection_selectAll,
+         selectChild: selection_selectChild,
+         selectChildren: selection_selectChildren,
+         filter: selection_filter,
+         data: selection_data,
+         enter: selection_enter,
+         exit: selection_exit,
+         join: selection_join,
+         merge: selection_merge,
+         selection: selection_selection,
+         order: selection_order,
+         sort: selection_sort,
+         call: selection_call,
+         nodes: selection_nodes,
+         node: selection_node,
+         size: selection_size,
+         empty: selection_empty,
+         each: selection_each,
+         attr: selection_attr,
+         style: selection_style,
+         property: selection_property,
+         classed: selection_classed,
+         text: selection_text,
+         html: selection_html,
+         raise: selection_raise,
+         lower: selection_lower,
+         append: selection_append,
+         insert: selection_insert,
+         remove: selection_remove,
+         clone: selection_clone,
+         datum: selection_datum,
+         on: selection_on,
+         dispatch: selection_dispatch
+       }, Symbol.iterator, _callee);

 
 

-                       if (matchedRestriction && matchedRestriction.end) { return; }  // don't advance any further
+       function select (selector) {
+         return typeof selector === "string" ? new Selection$1([[document.querySelector(selector)]], [document.documentElement]) : new Selection$1([[selector]], root$1);
+       }

 
 

-                       // which nodes can we step into?
-                       var n1 = vgraph.entity(entity.first());
-                       var n2 = vgraph.entity(entity.last());
-                       var dist = geoSphericalDistance(n1.loc, n2.loc);
-                       var nextNodes = [];
+       function sourceEvent (event) {
+         var sourceEvent;

 
 

-                       if (currPath.length > 1) {
-                           if (dist > maxDistance) { return; }   // the next node is too far
-                           if (!entity.__via) { return; }        // this way is a leaf / can't be a via
-                       }
+         while (sourceEvent = event.sourceEvent) {
+           event = sourceEvent;
+         }

 
 

-                       if (!entity.__oneWay &&                     // bidirectional..
-                           keyVertexIds.indexOf(n1.id) !== -1 &&   // key vertex..
-                           currPath.indexOf(n1.id) === -1) {       // haven't seen it yet..
-                           nextNodes.push(n1);                     // can advance to first node
-                       }
-                       if (keyVertexIds.indexOf(n2.id) !== -1 &&   // key vertex..
-                           currPath.indexOf(n2.id) === -1) {       // haven't seen it yet..
-                           nextNodes.push(n2);                     // can advance to last node
-                       }
+         return event;
+       }

 
 

-                       nextNodes.forEach(function(nextNode) {
-                           // gather restrictions FROM this way
-                           var fromRestrictions = vgraph.parentRelations(entity).filter(function(r) {
-                               if (!r.isRestriction()) { return false; }
-
-                               var f = r.memberByRole('from');
-                               if (!f || f.id !== entity.id) { return false; }
-
-                               var isOnly = /^only_/.test(r.tags.restriction);
-                               if (!isOnly) { return true; }
-
-                               // `only_` restrictions only matter along the direction of the VIA - #4849
-                               var isOnlyVia = false;
-                               var v = r.membersByRole('via');
-                               if (v.length === 1 && v[0].type === 'node') {   // via node
-                                   isOnlyVia = (v[0].id === nextNode.id);
-                               } else {                                        // via way(s)
-                                   for (var i = 0; i < v.length; i++) {
-                                       if (v[i].type !== 'way') { continue; }
-                                       var viaWay = vgraph.entity(v[i].id);
-                                       if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
-                                           isOnlyVia = true;
-                                           break;
-                                       }
-                                   }
-                               }
-                               return isOnlyVia;
-                           });
+       function pointer (event, node) {
+         event = sourceEvent(event);
+         if (node === undefined) node = event.currentTarget;

 
 

-                           step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
-                       });
-                   }
-               }
+         if (node) {
+           var svg = node.ownerSVGElement || node;

 
 

+           if (svg.createSVGPoint) {
+             var point = svg.createSVGPoint();
+             point.x = event.clientX, point.y = event.clientY;
+             point = point.matrixTransform(node.getScreenCTM().inverse());
+             return [point.x, point.y];
+           }

 
 

-               // assumes path is alternating way-node-way of odd length
-               function pathToTurn(path) {
-                   if (path.length < 3) { return; }
-                   var fromWayId, fromNodeId, fromVertexId;
-                   var toWayId, toNodeId, toVertexId;
-                   var viaWayIds, viaNodeId, isUturn;
+           if (node.getBoundingClientRect) {
+             var rect = node.getBoundingClientRect();
+             return [event.clientX - rect.left - node.clientLeft, event.clientY - rect.top - node.clientTop];
+           }
+         }

 
 

-                   fromWayId = path[0];
-                   toWayId = path[path.length - 1];
+         return [event.pageX, event.pageY];
+       }

 
 

-                   if (path.length === 3 && fromWayId === toWayId) {  // u turn
-                       var way = vgraph.entity(fromWayId);
-                       if (way.__oneWay) { return null; }
+       function selectAll (selector) {
+         return typeof selector === "string" ? new Selection$1([document.querySelectorAll(selector)], [document.documentElement]) : new Selection$1([selector == null ? [] : array(selector)], root$1);
+       }

 
 

-                       isUturn = true;
-                       viaNodeId = fromVertexId = toVertexId = path[1];
-                       fromNodeId = toNodeId = adjacentNode(fromWayId, viaNodeId);
+       function nopropagation$1(event) {
+         event.stopImmediatePropagation();
+       }
+       function noevent$1 (event) {
+         event.preventDefault();
+         event.stopImmediatePropagation();
+       }

 
 

-                   } else {
-                       isUturn = false;
-                       fromVertexId = path[1];
-                       fromNodeId = adjacentNode(fromWayId, fromVertexId);
-                       toVertexId = path[path.length - 2];
-                       toNodeId = adjacentNode(toWayId, toVertexId);
-
-                       if (path.length === 3) {
-                           viaNodeId = path[1];
-                       } else {
-                           viaWayIds = path.filter(function(entityId) { return entityId[0] === 'w'; });
-                           viaWayIds = viaWayIds.slice(1, viaWayIds.length - 1);  // remove first, last
-                       }
-                   }
+       function dragDisable (view) {
+         var root = view.document.documentElement,
+             selection = select(view).on("dragstart.drag", noevent$1, true);

 
 

-                   return {
-                       key:  path.join('_'),
-                       path: path,
-                       from: { node: fromNodeId, way:  fromWayId, vertex: fromVertexId },
-                       via:  { node: viaNodeId,  ways: viaWayIds },
-                       to:   { node: toNodeId,   way:  toWayId, vertex: toVertexId },
-                       u:    isUturn
-                   };
+         if ("onselectstart" in root) {
+           selection.on("selectstart.drag", noevent$1, true);
+         } else {
+           root.__noselect = root.style.MozUserSelect;
+           root.style.MozUserSelect = "none";
+         }
+       }
+       function yesdrag(view, noclick) {
+         var root = view.document.documentElement,
+             selection = select(view).on("dragstart.drag", null);

 
 

+         if (noclick) {
+           selection.on("click.drag", noevent$1, true);
+           setTimeout(function () {
+             selection.on("click.drag", null);
+           }, 0);
+         }

 
 

-                   function adjacentNode(wayId, affixId) {
-                       var nodes = vgraph.entity(wayId).nodes;
-                       return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
-                   }
-               }
+         if ("onselectstart" in root) {
+           selection.on("selectstart.drag", null);
+         } else {
+           root.style.MozUserSelect = root.__noselect;
+           delete root.__noselect;
+         }
+       }

 
 

-           };
+       var constant$2 = (function (x) {
+         return function () {
+           return x;
+         };
+       });

 
 

-           return intersection;
+       function DragEvent(type, _ref) {
+         var sourceEvent = _ref.sourceEvent,
+             subject = _ref.subject,
+             target = _ref.target,
+             identifier = _ref.identifier,
+             active = _ref.active,
+             x = _ref.x,
+             y = _ref.y,
+             dx = _ref.dx,
+             dy = _ref.dy,
+             dispatch = _ref.dispatch;
+         Object.defineProperties(this, {
+           type: {
+             value: type,
+             enumerable: true,
+             configurable: true
+           },
+           sourceEvent: {
+             value: sourceEvent,
+             enumerable: true,
+             configurable: true
+           },
+           subject: {
+             value: subject,
+             enumerable: true,
+             configurable: true
+           },
+           target: {
+             value: target,
+             enumerable: true,
+             configurable: true
+           },
+           identifier: {
+             value: identifier,
+             enumerable: true,
+             configurable: true
+           },
+           active: {
+             value: active,
+             enumerable: true,
+             configurable: true
+           },
+           x: {
+             value: x,
+             enumerable: true,
+             configurable: true
+           },
+           y: {
+             value: y,
+             enumerable: true,
+             configurable: true
+           },
+           dx: {
+             value: dx,
+             enumerable: true,
+             configurable: true
+           },
+           dy: {
+             value: dy,
+             enumerable: true,
+             configurable: true
+           },
+           _: {
+             value: dispatch
+           }
+         });

        }
 
        }
 

+       DragEvent.prototype.on = function () {
+         var value = this._.on.apply(this._, arguments);

 
 

-       function osmInferRestriction(graph, turn, projection) {
-           var fromWay = graph.entity(turn.from.way);
-           var fromNode = graph.entity(turn.from.node);
-           var fromVertex = graph.entity(turn.from.vertex);
-           var toWay = graph.entity(turn.to.way);
-           var toNode = graph.entity(turn.to.node);
-           var toVertex = graph.entity(turn.to.vertex);
-
-           var fromOneWay = (fromWay.tags.oneway === 'yes');
-           var toOneWay = (toWay.tags.oneway === 'yes');
-           var angle = (geoAngle(fromVertex, fromNode, projection) -
-                       geoAngle(toVertex, toNode, projection)) * 180 / Math.PI;
+         return value === this._ ? this : value;
+       };

 
 

-           while (angle < 0)
-               { angle += 360; }
+       function defaultFilter$2(event) {
+         return !event.ctrlKey && !event.button;
+       }

 
 

-           if (fromNode === toNode)
-               { return 'no_u_turn'; }
-           if ((angle < 23 || angle > 336) && fromOneWay && toOneWay)
-               { return 'no_u_turn'; }   // wider tolerance for u-turn if both ways are oneway
-           if ((angle < 40 || angle > 319) && fromOneWay && toOneWay && turn.from.vertex !== turn.to.vertex)
-               { return 'no_u_turn'; }   // even wider tolerance for u-turn if there is a via way (from !== to)
-           if (angle < 158)
-               { return 'no_right_turn'; }
-           if (angle > 202)
-               { return 'no_left_turn'; }
+       function defaultContainer() {
+         return this.parentNode;
+       }

 
 

-           return 'no_straight_on';
+       function defaultSubject(event, d) {
+         return d == null ? {
+           x: event.x,
+           y: event.y
+         } : d;

        }
 
        }
 

-       function actionMergePolygon(ids, newRelationId) {
+       function defaultTouchable$1() {
+         return navigator.maxTouchPoints || "ontouchstart" in this;
+       }

 
 

-           function groupEntities(graph) {
-               var entities = ids.map(function (id) { return graph.entity(id); });
-               var geometryGroups = utilArrayGroupBy(entities, function(entity) {
-                   if (entity.type === 'way' && entity.isClosed()) {
-                       return 'closedWay';
-                   } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-                       return 'multipolygon';
-                   } else {
-                       return 'other';
-                   }
-               });
+       function d3_drag () {
+         var filter = defaultFilter$2,
+             container = defaultContainer,
+             subject = defaultSubject,
+             touchable = defaultTouchable$1,
+             gestures = {},
+             listeners = dispatch$8("start", "drag", "end"),
+             active = 0,
+             mousedownx,
+             mousedowny,
+             mousemoving,
+             touchending,
+             clickDistance2 = 0;

 
 

-               return Object.assign(
-                   { closedWay: [], multipolygon: [], other: [] },
-                   geometryGroups
-               );
-           }
+         function drag(selection) {
+           selection.on("mousedown.drag", mousedowned).filter(touchable).on("touchstart.drag", touchstarted).on("touchmove.drag", touchmoved).on("touchend.drag touchcancel.drag", touchended).style("touch-action", "none").style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+         }

 
 

+         function mousedowned(event, d) {
+           if (touchending || !filter.call(this, event, d)) return;
+           var gesture = beforestart(this, container.call(this, event, d), event, d, "mouse");
+           if (!gesture) return;
+           select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
+           dragDisable(event.view);
+           nopropagation$1(event);
+           mousemoving = false;
+           mousedownx = event.clientX;
+           mousedowny = event.clientY;
+           gesture("start", event);
+         }

 
 

-           var action = function(graph) {
-               var entities = groupEntities(graph);
+         function mousemoved(event) {
+           noevent$1(event);

 
 

-               // An array representing all the polygons that are part of the multipolygon.
-               //
-               // Each element is itself an array of objects with an id property, and has a
-               // locs property which is an array of the locations forming the polygon.
-               var polygons = entities.multipolygon.reduce(function(polygons, m) {
-                   return polygons.concat(osmJoinWays(m.members, graph));
-               }, []).concat(entities.closedWay.map(function(d) {
-                   var member = [{id: d.id}];
-                   member.nodes = graph.childNodes(d);
-                   return member;
-               }));
+           if (!mousemoving) {
+             var dx = event.clientX - mousedownx,
+                 dy = event.clientY - mousedowny;
+             mousemoving = dx * dx + dy * dy > clickDistance2;
+           }

 
 

-               // contained is an array of arrays of boolean values,
-               // where contained[j][k] is true iff the jth way is
-               // contained by the kth way.
-               var contained = polygons.map(function(w, i) {
-                   return polygons.map(function(d, n) {
-                       if (i === n) { return null; }
-                       return geoPolygonContainsPolygon(
-                           d.nodes.map(function(n) { return n.loc; }),
-                           w.nodes.map(function(n) { return n.loc; })
-                       );
-                   });
-               });
+           gestures.mouse("drag", event);
+         }

 
 

-               // Sort all polygons as either outer or inner ways
-               var members = [];
-               var outer = true;
+         function mouseupped(event) {
+           select(event.view).on("mousemove.drag mouseup.drag", null);
+           yesdrag(event.view, mousemoving);
+           noevent$1(event);
+           gestures.mouse("end", event);
+         }

 
 

-               while (polygons.length) {
-                   extractUncontained(polygons);
-                   polygons = polygons.filter(isContained);
-                   contained = contained.filter(isContained).map(filterContained);
-               }
+         function touchstarted(event, d) {
+           if (!filter.call(this, event, d)) return;
+           var touches = event.changedTouches,
+               c = container.call(this, event, d),
+               n = touches.length,
+               i,
+               gesture;

 
 

-               function isContained(d, i) {
-                   return contained[i].some(function(val) { return val; });
-               }
+           for (i = 0; i < n; ++i) {
+             if (gesture = beforestart(this, c, event, d, touches[i].identifier, touches[i])) {
+               nopropagation$1(event);
+               gesture("start", event, touches[i]);
+             }
+           }
+         }

 
 

-               function filterContained(d) {
-                   return d.filter(isContained);
-               }
+         function touchmoved(event) {
+           var touches = event.changedTouches,
+               n = touches.length,
+               i,
+               gesture;

 
 

-               function extractUncontained(polygons) {
-                   polygons.forEach(function(d, i) {
-                       if (!isContained(d, i)) {
-                           d.forEach(function(member) {
-                               members.push({
-                                   type: 'way',
-                                   id: member.id,
-                                   role: outer ? 'outer' : 'inner'
-                               });
-                           });
-                       }
-                   });
-                   outer = !outer;
-               }
+           for (i = 0; i < n; ++i) {
+             if (gesture = gestures[touches[i].identifier]) {
+               noevent$1(event);
+               gesture("drag", event, touches[i]);
+             }
+           }
+         }

 
 

-               // Move all tags to one relation
-               var relation = entities.multipolygon[0] ||
-                   osmRelation({ id: newRelationId, tags: { type: 'multipolygon' }});
+         function touchended(event) {
+           var touches = event.changedTouches,
+               n = touches.length,
+               i,
+               gesture;
+           if (touchending) clearTimeout(touchending);
+           touchending = setTimeout(function () {
+             touchending = null;
+           }, 500); // Ghost clicks are delayed!

 
 

-               entities.multipolygon.slice(1).forEach(function(m) {
-                   relation = relation.mergeTags(m.tags);
-                   graph = graph.remove(m);
-               });
+           for (i = 0; i < n; ++i) {
+             if (gesture = gestures[touches[i].identifier]) {
+               nopropagation$1(event);
+               gesture("end", event, touches[i]);
+             }
+           }
+         }

 
 

-               entities.closedWay.forEach(function(way) {
-                   function isThisOuter(m) {
-                       return m.id === way.id && m.role !== 'inner';
-                   }
-                   if (members.some(isThisOuter)) {
-                       relation = relation.mergeTags(way.tags);
-                       graph = graph.replace(way.update({ tags: {} }));
-                   }
-               });
+         function beforestart(that, container, event, d, identifier, touch) {
+           var dispatch = listeners.copy(),
+               p = pointer(touch || event, container),
+               dx,
+               dy,
+               s;
+           if ((s = subject.call(that, new DragEvent("beforestart", {
+             sourceEvent: event,
+             target: drag,
+             identifier: identifier,
+             active: active,
+             x: p[0],
+             y: p[1],
+             dx: 0,
+             dy: 0,
+             dispatch: dispatch
+           }), d)) == null) return;
+           dx = s.x - p[0] || 0;
+           dy = s.y - p[1] || 0;
+           return function gesture(type, event, touch) {
+             var p0 = p,
+                 n;

 
 

-               return graph.replace(relation.update({
-                   members: members,
-                   tags: utilObjectOmit(relation.tags, ['area'])
-               }));
-           };
+             switch (type) {
+               case "start":
+                 gestures[identifier] = gesture, n = active++;
+                 break;

 
 

+               case "end":
+                 delete gestures[identifier], --active;
+               // nobreak

 
 

-           action.disabled = function(graph) {
-               var entities = groupEntities(graph);
-               if (entities.other.length > 0 ||
-                   entities.closedWay.length + entities.multipolygon.length < 2) {
-                   return 'not_eligible';
-               }
-               if (!entities.multipolygon.every(function(r) { return r.isComplete(graph); })) {
-                   return 'incomplete_relation';
-               }
+               case "drag":
+                 p = pointer(touch || event, container), n = active;
+                 break;
+             }

 
 

-               if (!entities.multipolygon.length) {
-                   var sharedMultipolygons = [];
-                   entities.closedWay.forEach(function(way, i) {
-                       if (i === 0) {
-                           sharedMultipolygons = graph.parentMultipolygons(way);
-                       } else {
-                           sharedMultipolygons = utilArrayIntersection(sharedMultipolygons, graph.parentMultipolygons(way));
-                       }
-                   });
-                   sharedMultipolygons = sharedMultipolygons.filter(function(relation) {
-                       return relation.members.length === entities.closedWay.length;
-                   });
-                   if (sharedMultipolygons.length) {
-                       // don't create a new multipolygon if it'd be redundant
-                       return 'not_eligible';
-                   }
-               } else if (entities.closedWay.some(function(way) {
-                       return utilArrayIntersection(graph.parentMultipolygons(way), entities.multipolygon).length;
-                   })) {
-                   // don't add a way to a multipolygon again if it's already a member
-                   return 'not_eligible';
-               }
+             dispatch.call(type, that, new DragEvent(type, {
+               sourceEvent: event,
+               subject: s,
+               target: drag,
+               identifier: identifier,
+               active: n,
+               x: p[0] + dx,
+               y: p[1] + dy,
+               dx: p[0] - p0[0],
+               dy: p[1] - p0[1],
+               dispatch: dispatch
+             }), d);

            };
            };

+         }

 
 

+         drag.filter = function (_) {
+           return arguments.length ? (filter = typeof _ === "function" ? _ : constant$2(!!_), drag) : filter;
+         };

 
 

-           return action;
-       }
+         drag.container = function (_) {
+           return arguments.length ? (container = typeof _ === "function" ? _ : constant$2(_), drag) : container;
+         };

 
 

-       // do not edit .js files directly - edit src/index.jst
+         drag.subject = function (_) {
+           return arguments.length ? (subject = typeof _ === "function" ? _ : constant$2(_), drag) : subject;
+         };

 
 

+         drag.touchable = function (_) {
+           return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$2(!!_), drag) : touchable;
+         };

 
 

+         drag.on = function () {
+           var value = listeners.on.apply(listeners, arguments);
+           return value === listeners ? drag : value;
+         };

 
 

-       var fastDeepEqual = function equal(a, b) {
-         if (a === b) { return true; }
+         drag.clickDistance = function (_) {
+           return arguments.length ? (clickDistance2 = (_ = +_) * _, drag) : Math.sqrt(clickDistance2);
+         };

 
 

-         if (a && b && typeof a == 'object' && typeof b == 'object') {
-           if (a.constructor !== b.constructor) { return false; }
+         return drag;
+       }

 
 

-           var length, i, keys;
-           if (Array.isArray(a)) {
-             length = a.length;
-             if (length != b.length) { return false; }
-             for (i = length; i-- !== 0;)
-               { if (!equal(a[i], b[i])) { return false; } }
-             return true;
+       var DESCRIPTORS$3 = descriptors;
+       var global$3 = global$F;
+       var isForced$1 = isForced_1;
+       var inheritIfRequired$1 = inheritIfRequired$4;
+       var createNonEnumerableProperty = createNonEnumerableProperty$e;
+       var defineProperty$1 = objectDefineProperty.f;
+       var getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
+       var isRegExp$1 = isRegexp;
+       var getFlags = regexpFlags$1;
+       var stickyHelpers = regexpStickyHelpers;
+       var redefine$2 = redefine$g.exports;
+       var fails$a = fails$N;
+       var has$1 = has$j;
+       var enforceInternalState = internalState.enforce;
+       var setSpecies = setSpecies$5;
+       var wellKnownSymbol$1 = wellKnownSymbol$s;
+       var UNSUPPORTED_DOT_ALL = regexpUnsupportedDotAll;
+       var UNSUPPORTED_NCG = regexpUnsupportedNcg;
+
+       var MATCH$1 = wellKnownSymbol$1('match');
+       var NativeRegExp = global$3.RegExp;
+       var RegExpPrototype = NativeRegExp.prototype;
+       // TODO: Use only propper RegExpIdentifierName
+       var IS_NCG = /^\?<[^\s\d!#%&*+<=>@^][^\s!#%&*+<=>@^]*>/;
+       var re1 = /a/g;
+       var re2 = /a/g;
+
+       // "new" should create a new object, old webkit bug
+       var CORRECT_NEW = new NativeRegExp(re1) !== re1;
+
+       var UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y;
+
+       var BASE_FORCED = DESCRIPTORS$3 &&
+         (!CORRECT_NEW || UNSUPPORTED_Y || UNSUPPORTED_DOT_ALL || UNSUPPORTED_NCG || fails$a(function () {
+           re2[MATCH$1] = false;
+           // RegExp constructor can alter flags and IsRegExp works correct with @@match
+           return NativeRegExp(re1) != re1 || NativeRegExp(re2) == re2 || NativeRegExp(re1, 'i') != '/a/i';
+         }));
+
+       var handleDotAll = function (string) {
+         var length = string.length;
+         var index = 0;
+         var result = '';
+         var brackets = false;
+         var chr;
+         for (; index <= length; index++) {
+           chr = string.charAt(index);
+           if (chr === '\\') {
+             result += chr + string.charAt(++index);
+             continue;
+           }
+           if (!brackets && chr === '.') {
+             result += '[\\s\\S]';
+           } else {
+             if (chr === '[') {
+               brackets = true;
+             } else if (chr === ']') {
+               brackets = false;
+             } result += chr;

            }
            }

+         } return result;
+       };

 
 

+       var handleNCG = function (string) {
+         var length = string.length;
+         var index = 0;
+         var result = '';
+         var named = [];
+         var names = {};
+         var brackets = false;
+         var ncg = false;
+         var groupid = 0;
+         var groupname = '';
+         var chr;
+         for (; index <= length; index++) {
+           chr = string.charAt(index);
+           if (chr === '\\') {
+             chr = chr + string.charAt(++index);
+           } else if (chr === ']') {
+             brackets = false;
+           } else if (!brackets) switch (true) {
+             case chr === '[':
+               brackets = true;
+               break;
+             case chr === '(':
+               if (IS_NCG.test(string.slice(index + 1))) {
+                 index += 2;
+                 ncg = true;
+               }
+               result += chr;
+               groupid++;
+               continue;
+             case chr === '>' && ncg:
+               if (groupname === '' || has$1(names, groupname)) {
+                 throw new SyntaxError('Invalid capture group name');
+               }
+               names[groupname] = true;
+               named.push([groupname, groupid]);
+               ncg = false;
+               groupname = '';
+               continue;
+           }
+           if (ncg) groupname += chr;
+           else result += chr;
+         } return [result, named];
+       };

 
 

+       // `RegExp` constructor
+       // https://tc39.es/ecma262/#sec-regexp-constructor
+       if (isForced$1('RegExp', BASE_FORCED)) {
+         var RegExpWrapper = function RegExp(pattern, flags) {
+           var thisIsRegExp = this instanceof RegExpWrapper;
+           var patternIsRegExp = isRegExp$1(pattern);
+           var flagsAreUndefined = flags === undefined;
+           var groups = [];
+           var rawPattern, rawFlags, dotAll, sticky, handled, result, state;

 
 

-           if (a.constructor === RegExp) { return a.source === b.source && a.flags === b.flags; }
-           if (a.valueOf !== Object.prototype.valueOf) { return a.valueOf() === b.valueOf(); }
-           if (a.toString !== Object.prototype.toString) { return a.toString() === b.toString(); }
-
-           keys = Object.keys(a);
-           length = keys.length;
-           if (length !== Object.keys(b).length) { return false; }
+           if (!thisIsRegExp && patternIsRegExp && pattern.constructor === RegExpWrapper && flagsAreUndefined) {
+             return pattern;
+           }

 
 

-           for (i = length; i-- !== 0;)
-             { if (!Object.prototype.hasOwnProperty.call(b, keys[i])) { return false; } }
+           if (CORRECT_NEW) {
+             if (patternIsRegExp && !flagsAreUndefined) pattern = pattern.source;
+           } else if (pattern instanceof RegExpWrapper) {
+             if (flagsAreUndefined) flags = getFlags.call(pattern);
+             pattern = pattern.source;
+           }

 
 

-           for (i = length; i-- !== 0;) {
-             var key = keys[i];
+           pattern = pattern === undefined ? '' : String(pattern);
+           flags = flags === undefined ? '' : String(flags);
+           rawPattern = pattern;

 
 

-             if (!equal(a[key], b[key])) { return false; }
+           if (UNSUPPORTED_DOT_ALL && 'dotAll' in re1) {
+             dotAll = !!flags && flags.indexOf('s') > -1;
+             if (dotAll) flags = flags.replace(/s/g, '');

            }
 
            }
 

-           return true;
-         }
-
-         // true if both NaN, false otherwise
-         return a!==a && b!==b;
-       };
+           rawFlags = flags;

 
 

-       // Text diff algorithm following Hunt and McIlroy 1976.
-       // J. W. Hunt and M. D. McIlroy, An algorithm for differential buffer
-       // comparison, Bell Telephone Laboratories CSTR #41 (1976)
-       // http://www.cs.dartmouth.edu/~doug/
-       // https://en.wikipedia.org/wiki/Longest_common_subsequence_problem
-       //
-       // Expects two arrays, finds longest common sequence
-       function LCS(buffer1, buffer2) {
+           if (UNSUPPORTED_Y && 'sticky' in re1) {
+             sticky = !!flags && flags.indexOf('y') > -1;
+             if (sticky) flags = flags.replace(/y/g, '');
+           }

 
 

-         var equivalenceClasses = {};
-         for (var j = 0; j < buffer2.length; j++) {
-           var item = buffer2[j];
-           if (equivalenceClasses[item]) {
-             equivalenceClasses[item].push(j);
-           } else {
-             equivalenceClasses[item] = [j];
+           if (UNSUPPORTED_NCG) {
+             handled = handleNCG(pattern);
+             pattern = handled[0];
+             groups = handled[1];

            }
            }

-         }

 
 

-         var NULLRESULT = { buffer1index: -1, buffer2index: -1, chain: null };
-         var candidates = [NULLRESULT];
+           result = inheritIfRequired$1(
+             CORRECT_NEW ? new NativeRegExp(pattern, flags) : NativeRegExp(pattern, flags),
+             thisIsRegExp ? this : RegExpPrototype,
+             RegExpWrapper
+           );

 
 

-         for (var i = 0; i < buffer1.length; i++) {
-           var item$1 = buffer1[i];
-           var buffer2indices = equivalenceClasses[item$1] || [];
-           var r = 0;
-           var c = candidates[0];
+           if (dotAll || sticky || groups.length) {
+             state = enforceInternalState(result);
+             if (dotAll) {
+               state.dotAll = true;
+               state.raw = RegExpWrapper(handleDotAll(pattern), rawFlags);
+             }
+             if (sticky) state.sticky = true;
+             if (groups.length) state.groups = groups;
+           }

 
 

-           for (var jx = 0; jx < buffer2indices.length; jx++) {
-             var j$1 = buffer2indices[jx];
+           if (pattern !== rawPattern) try {
+             // fails in old engines, but we have no alternatives for unsupported regex syntax
+             createNonEnumerableProperty(result, 'source', rawPattern === '' ? '(?:)' : rawPattern);
+           } catch (error) { /* empty */ }

 
 

-             var s = (void 0);
-             for (s = r; s < candidates.length; s++) {
-               if ((candidates[s].buffer2index < j$1) && ((s === candidates.length - 1) || (candidates[s + 1].buffer2index > j$1))) {
-                 break;
-               }
-             }
+           return result;
+         };

 
 

-             if (s < candidates.length) {
-               var newCandidate = { buffer1index: i, buffer2index: j$1, chain: candidates[s] };
-               if (r === candidates.length) {
-                 candidates.push(c);
-               } else {
-                 candidates[r] = c;
-               }
-               r = s + 1;
-               c = newCandidate;
-               if (r === candidates.length) {
-                 break; // no point in examining further (j)s
-               }
-             }
-           }
+         var proxy = function (key) {
+           key in RegExpWrapper || defineProperty$1(RegExpWrapper, key, {
+             configurable: true,
+             get: function () { return NativeRegExp[key]; },
+             set: function (it) { NativeRegExp[key] = it; }
+           });
+         };

 
 

-           candidates[r] = c;
+         for (var keys$1 = getOwnPropertyNames$1(NativeRegExp), index$1 = 0; keys$1.length > index$1;) {
+           proxy(keys$1[index$1++]);

          }
 
          }
 

-         // At this point, we know the LCS: it's in the reverse of the
-         // linked-list through .chain of candidates[candidates.length - 1].
+         RegExpPrototype.constructor = RegExpWrapper;
+         RegExpWrapper.prototype = RegExpPrototype;
+         redefine$2(global$3, 'RegExp', RegExpWrapper);
+       }
+
+       // https://tc39.es/ecma262/#sec-get-regexp-@@species
+       setSpecies('RegExp');

 
 

-         return candidates[candidates.length - 1];
+       function define (constructor, factory, prototype) {
+         constructor.prototype = factory.prototype = prototype;
+         prototype.constructor = constructor;

        }
        }

+       function extend$3(parent, definition) {
+         var prototype = Object.create(parent.prototype);

 
 

+         for (var key in definition) {
+           prototype[key] = definition[key];
+         }

 
 

-       // We apply the LCS to give a simple representation of the
-       // offsets and lengths of mismatched chunks in the input
-       // buffers. This is used by diff3MergeRegions.
-       function diffIndices(buffer1, buffer2) {
-         var lcs = LCS(buffer1, buffer2);
-         var result = [];
-         var tail1 = buffer1.length;
-         var tail2 = buffer2.length;
+         return prototype;
+       }

 
 

-         for (var candidate = lcs; candidate !== null; candidate = candidate.chain) {
-           var mismatchLength1 = tail1 - candidate.buffer1index - 1;
-           var mismatchLength2 = tail2 - candidate.buffer2index - 1;
-           tail1 = candidate.buffer1index;
-           tail2 = candidate.buffer2index;
+       function Color() {}
+       var _darker = 0.7;

 
 

-           if (mismatchLength1 || mismatchLength2) {
-             result.push({
-               buffer1: [tail1 + 1, mismatchLength1],
-               buffer1Content: buffer1.slice(tail1 + 1, tail1 + 1 + mismatchLength1),
-               buffer2: [tail2 + 1, mismatchLength2],
-               buffer2Content: buffer2.slice(tail2 + 1, tail2 + 1 + mismatchLength2)
-             });
-           }
-         }
+       var _brighter = 1 / _darker;
+       var reI = "\\s*([+-]?\\d+)\\s*",
+           reN = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)\\s*",
+           reP = "\\s*([+-]?\\d*\\.?\\d+(?:[eE][+-]?\\d+)?)%\\s*",
+           reHex = /^#([0-9a-f]{3,8})$/,
+           reRgbInteger = new RegExp("^rgb\\(" + [reI, reI, reI] + "\\)$"),
+           reRgbPercent = new RegExp("^rgb\\(" + [reP, reP, reP] + "\\)$"),
+           reRgbaInteger = new RegExp("^rgba\\(" + [reI, reI, reI, reN] + "\\)$"),
+           reRgbaPercent = new RegExp("^rgba\\(" + [reP, reP, reP, reN] + "\\)$"),
+           reHslPercent = new RegExp("^hsl\\(" + [reN, reP, reP] + "\\)$"),
+           reHslaPercent = new RegExp("^hsla\\(" + [reN, reP, reP, reN] + "\\)$");
+       var named = {
+         aliceblue: 0xf0f8ff,
+         antiquewhite: 0xfaebd7,
+         aqua: 0x00ffff,
+         aquamarine: 0x7fffd4,
+         azure: 0xf0ffff,
+         beige: 0xf5f5dc,
+         bisque: 0xffe4c4,
+         black: 0x000000,
+         blanchedalmond: 0xffebcd,
+         blue: 0x0000ff,
+         blueviolet: 0x8a2be2,
+         brown: 0xa52a2a,
+         burlywood: 0xdeb887,
+         cadetblue: 0x5f9ea0,
+         chartreuse: 0x7fff00,
+         chocolate: 0xd2691e,
+         coral: 0xff7f50,
+         cornflowerblue: 0x6495ed,
+         cornsilk: 0xfff8dc,
+         crimson: 0xdc143c,
+         cyan: 0x00ffff,
+         darkblue: 0x00008b,
+         darkcyan: 0x008b8b,
+         darkgoldenrod: 0xb8860b,
+         darkgray: 0xa9a9a9,
+         darkgreen: 0x006400,
+         darkgrey: 0xa9a9a9,
+         darkkhaki: 0xbdb76b,
+         darkmagenta: 0x8b008b,
+         darkolivegreen: 0x556b2f,
+         darkorange: 0xff8c00,
+         darkorchid: 0x9932cc,
+         darkred: 0x8b0000,
+         darksalmon: 0xe9967a,
+         darkseagreen: 0x8fbc8f,
+         darkslateblue: 0x483d8b,
+         darkslategray: 0x2f4f4f,
+         darkslategrey: 0x2f4f4f,
+         darkturquoise: 0x00ced1,
+         darkviolet: 0x9400d3,
+         deeppink: 0xff1493,
+         deepskyblue: 0x00bfff,
+         dimgray: 0x696969,
+         dimgrey: 0x696969,
+         dodgerblue: 0x1e90ff,
+         firebrick: 0xb22222,
+         floralwhite: 0xfffaf0,
+         forestgreen: 0x228b22,
+         fuchsia: 0xff00ff,
+         gainsboro: 0xdcdcdc,
+         ghostwhite: 0xf8f8ff,
+         gold: 0xffd700,
+         goldenrod: 0xdaa520,
+         gray: 0x808080,
+         green: 0x008000,
+         greenyellow: 0xadff2f,
+         grey: 0x808080,
+         honeydew: 0xf0fff0,
+         hotpink: 0xff69b4,
+         indianred: 0xcd5c5c,
+         indigo: 0x4b0082,
+         ivory: 0xfffff0,
+         khaki: 0xf0e68c,
+         lavender: 0xe6e6fa,
+         lavenderblush: 0xfff0f5,
+         lawngreen: 0x7cfc00,
+         lemonchiffon: 0xfffacd,
+         lightblue: 0xadd8e6,
+         lightcoral: 0xf08080,
+         lightcyan: 0xe0ffff,
+         lightgoldenrodyellow: 0xfafad2,
+         lightgray: 0xd3d3d3,
+         lightgreen: 0x90ee90,
+         lightgrey: 0xd3d3d3,
+         lightpink: 0xffb6c1,
+         lightsalmon: 0xffa07a,
+         lightseagreen: 0x20b2aa,
+         lightskyblue: 0x87cefa,
+         lightslategray: 0x778899,
+         lightslategrey: 0x778899,
+         lightsteelblue: 0xb0c4de,
+         lightyellow: 0xffffe0,
+         lime: 0x00ff00,
+         limegreen: 0x32cd32,
+         linen: 0xfaf0e6,
+         magenta: 0xff00ff,
+         maroon: 0x800000,
+         mediumaquamarine: 0x66cdaa,
+         mediumblue: 0x0000cd,
+         mediumorchid: 0xba55d3,
+         mediumpurple: 0x9370db,
+         mediumseagreen: 0x3cb371,
+         mediumslateblue: 0x7b68ee,
+         mediumspringgreen: 0x00fa9a,
+         mediumturquoise: 0x48d1cc,
+         mediumvioletred: 0xc71585,
+         midnightblue: 0x191970,
+         mintcream: 0xf5fffa,
+         mistyrose: 0xffe4e1,
+         moccasin: 0xffe4b5,
+         navajowhite: 0xffdead,
+         navy: 0x000080,
+         oldlace: 0xfdf5e6,
+         olive: 0x808000,
+         olivedrab: 0x6b8e23,
+         orange: 0xffa500,
+         orangered: 0xff4500,
+         orchid: 0xda70d6,
+         palegoldenrod: 0xeee8aa,
+         palegreen: 0x98fb98,
+         paleturquoise: 0xafeeee,
+         palevioletred: 0xdb7093,
+         papayawhip: 0xffefd5,
+         peachpuff: 0xffdab9,
+         peru: 0xcd853f,
+         pink: 0xffc0cb,
+         plum: 0xdda0dd,
+         powderblue: 0xb0e0e6,
+         purple: 0x800080,
+         rebeccapurple: 0x663399,
+         red: 0xff0000,
+         rosybrown: 0xbc8f8f,
+         royalblue: 0x4169e1,
+         saddlebrown: 0x8b4513,
+         salmon: 0xfa8072,
+         sandybrown: 0xf4a460,
+         seagreen: 0x2e8b57,
+         seashell: 0xfff5ee,
+         sienna: 0xa0522d,
+         silver: 0xc0c0c0,
+         skyblue: 0x87ceeb,
+         slateblue: 0x6a5acd,
+         slategray: 0x708090,
+         slategrey: 0x708090,
+         snow: 0xfffafa,
+         springgreen: 0x00ff7f,
+         steelblue: 0x4682b4,
+         tan: 0xd2b48c,
+         teal: 0x008080,
+         thistle: 0xd8bfd8,
+         tomato: 0xff6347,
+         turquoise: 0x40e0d0,
+         violet: 0xee82ee,
+         wheat: 0xf5deb3,
+         white: 0xffffff,
+         whitesmoke: 0xf5f5f5,
+         yellow: 0xffff00,
+         yellowgreen: 0x9acd32
+       };
+       define(Color, color, {
+         copy: function copy(channels) {
+           return Object.assign(new this.constructor(), this, channels);
+         },
+         displayable: function displayable() {
+           return this.rgb().displayable();
+         },
+         hex: color_formatHex,
+         // Deprecated! Use color.formatHex.
+         formatHex: color_formatHex,
+         formatHsl: color_formatHsl,
+         formatRgb: color_formatRgb,
+         toString: color_formatRgb
+       });

 
 

-         result.reverse();
-         return result;
+       function color_formatHex() {
+         return this.rgb().formatHex();

        }
 
        }
 

+       function color_formatHsl() {
+         return hslConvert(this).formatHsl();
+       }

 
 

-       // Given three buffers, A, O, and B, where both A and B are
-       // independently derived from O, returns a fairly complicated
-       // internal representation of merge decisions it's taken. The
-       // interested reader may wish to consult
-       //
-       // Sanjeev Khanna, Keshav Kunal, and Benjamin C. Pierce.
-       // 'A Formal Investigation of ' In Arvind and Prasad,
-       // editors, Foundations of Software Technology and Theoretical
-       // Computer Science (FSTTCS), December 2007.
-       //
-       // (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf)
-       //
-       function diff3MergeRegions(a, o, b) {
+       function color_formatRgb() {
+         return this.rgb().formatRgb();
+       }

 
 

-         // "hunks" are array subsets where `a` or `b` are different from `o`
-         // https://www.gnu.org/software/diffutils/manual/html_node/diff3-Hunks.html
-         var hunks = [];
-         function addHunk(h, ab) {
-           hunks.push({
-             ab: ab,
-             oStart: h.buffer1[0],
-             oLength: h.buffer1[1],   // length of o to remove
-             abStart: h.buffer2[0],
-             abLength: h.buffer2[1]   // length of a/b to insert
-             // abContent: (ab === 'a' ? a : b).slice(h.buffer2[0], h.buffer2[0] + h.buffer2[1])
-           });
-         }
+       function color(format) {
+         var m, l;
+         format = (format + "").trim().toLowerCase();
+         return (m = reHex.exec(format)) ? (l = m[1].length, m = parseInt(m[1], 16), l === 6 ? rgbn(m) // #ff0000
+         : l === 3 ? new Rgb(m >> 8 & 0xf | m >> 4 & 0xf0, m >> 4 & 0xf | m & 0xf0, (m & 0xf) << 4 | m & 0xf, 1) // #f00
+         : l === 8 ? rgba(m >> 24 & 0xff, m >> 16 & 0xff, m >> 8 & 0xff, (m & 0xff) / 0xff) // #ff000000
+         : l === 4 ? rgba(m >> 12 & 0xf | m >> 8 & 0xf0, m >> 8 & 0xf | m >> 4 & 0xf0, m >> 4 & 0xf | m & 0xf0, ((m & 0xf) << 4 | m & 0xf) / 0xff) // #f000
+         : null // invalid hex
+         ) : (m = reRgbInteger.exec(format)) ? new Rgb(m[1], m[2], m[3], 1) // rgb(255, 0, 0)
+         : (m = reRgbPercent.exec(format)) ? new Rgb(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, 1) // rgb(100%, 0%, 0%)
+         : (m = reRgbaInteger.exec(format)) ? rgba(m[1], m[2], m[3], m[4]) // rgba(255, 0, 0, 1)
+         : (m = reRgbaPercent.exec(format)) ? rgba(m[1] * 255 / 100, m[2] * 255 / 100, m[3] * 255 / 100, m[4]) // rgb(100%, 0%, 0%, 1)
+         : (m = reHslPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, 1) // hsl(120, 50%, 50%)
+         : (m = reHslaPercent.exec(format)) ? hsla(m[1], m[2] / 100, m[3] / 100, m[4]) // hsla(120, 50%, 50%, 1)
+         : named.hasOwnProperty(format) ? rgbn(named[format]) // eslint-disable-line no-prototype-builtins
+         : format === "transparent" ? new Rgb(NaN, NaN, NaN, 0) : null;
+       }

 
 

-         diffIndices(o, a).forEach(function (item) { return addHunk(item, 'a'); });
-         diffIndices(o, b).forEach(function (item) { return addHunk(item, 'b'); });
-         hunks.sort(function (x,y) { return x.oStart - y.oStart; });
+       function rgbn(n) {
+         return new Rgb(n >> 16 & 0xff, n >> 8 & 0xff, n & 0xff, 1);
+       }

 
 

-         var results = [];
-         var currOffset = 0;
+       function rgba(r, g, b, a) {
+         if (a <= 0) r = g = b = NaN;
+         return new Rgb(r, g, b, a);
+       }

 
 

-         function advanceTo(endOffset) {
-           if (endOffset > currOffset) {
-             results.push({
-               stable: true,
-               buffer: 'o',
-               bufferStart: currOffset,
-               bufferLength: endOffset - currOffset,
-               bufferContent: o.slice(currOffset, endOffset)
-             });
-             currOffset = endOffset;
-           }
-         }
+       function rgbConvert(o) {
+         if (!(o instanceof Color)) o = color(o);
+         if (!o) return new Rgb();
+         o = o.rgb();
+         return new Rgb(o.r, o.g, o.b, o.opacity);
+       }
+       function rgb(r, g, b, opacity) {
+         return arguments.length === 1 ? rgbConvert(r) : new Rgb(r, g, b, opacity == null ? 1 : opacity);
+       }
+       function Rgb(r, g, b, opacity) {
+         this.r = +r;
+         this.g = +g;
+         this.b = +b;
+         this.opacity = +opacity;
+       }
+       define(Rgb, rgb, extend$3(Color, {
+         brighter: function brighter(k) {
+           k = k == null ? _brighter : Math.pow(_brighter, k);
+           return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+         },
+         darker: function darker(k) {
+           k = k == null ? _darker : Math.pow(_darker, k);
+           return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
+         },
+         rgb: function rgb() {
+           return this;
+         },
+         displayable: function displayable() {
+           return -0.5 <= this.r && this.r < 255.5 && -0.5 <= this.g && this.g < 255.5 && -0.5 <= this.b && this.b < 255.5 && 0 <= this.opacity && this.opacity <= 1;
+         },
+         hex: rgb_formatHex,
+         // Deprecated! Use color.formatHex.
+         formatHex: rgb_formatHex,
+         formatRgb: rgb_formatRgb,
+         toString: rgb_formatRgb
+       }));

 
 

-         while (hunks.length) {
-           var hunk = hunks.shift();
-           var regionStart = hunk.oStart;
-           var regionEnd = hunk.oStart + hunk.oLength;
-           var regionHunks = [hunk];
-           advanceTo(regionStart);
+       function rgb_formatHex() {
+         return "#" + hex$1(this.r) + hex$1(this.g) + hex$1(this.b);
+       }

 
 

-           // Try to pull next overlapping hunk into this region
-           while (hunks.length) {
-             var nextHunk = hunks[0];
-             var nextHunkStart = nextHunk.oStart;
-             if (nextHunkStart > regionEnd) { break; }   // no overlap
+       function rgb_formatRgb() {
+         var a = this.opacity;
+         a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+         return (a === 1 ? "rgb(" : "rgba(") + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.b) || 0)) + (a === 1 ? ")" : ", " + a + ")");
+       }

 
 

-             regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
-             regionHunks.push(hunks.shift());
-           }
+       function hex$1(value) {
+         value = Math.max(0, Math.min(255, Math.round(value) || 0));
+         return (value < 16 ? "0" : "") + value.toString(16);
+       }

 
 

-           if (regionHunks.length === 1) {
-             // Only one hunk touches this region, meaning that there is no conflict here.
-             // Either `a` or `b` is inserting into a region of `o` unchanged by the other.
-             if (hunk.abLength > 0) {
-               var buffer = (hunk.ab === 'a' ? a : b);
-               results.push({
-                 stable: true,
-                 buffer: hunk.ab,
-                 bufferStart: hunk.abStart,
-                 bufferLength: hunk.abLength,
-                 bufferContent: buffer.slice(hunk.abStart, hunk.abStart + hunk.abLength)
-               });
-             }
-           } else {
-             // A true a/b conflict. Determine the bounds involved from `a`, `o`, and `b`.
-             // Effectively merge all the `a` hunks into one giant hunk, then do the
-             // same for the `b` hunks; then, correct for skew in the regions of `o`
-             // that each side changed, and report appropriate spans for the three sides.
-             var bounds = {
-               a: [a.length, -1, o.length, -1],
-               b: [b.length, -1, o.length, -1]
-             };
-             while (regionHunks.length) {
-               hunk = regionHunks.shift();
-               var oStart = hunk.oStart;
-               var oEnd = oStart + hunk.oLength;
-               var abStart = hunk.abStart;
-               var abEnd = abStart + hunk.abLength;
-               var b$1 = bounds[hunk.ab];
-               b$1[0] = Math.min(abStart, b$1[0]);
-               b$1[1] = Math.max(abEnd, b$1[1]);
-               b$1[2] = Math.min(oStart, b$1[2]);
-               b$1[3] = Math.max(oEnd, b$1[3]);
-             }
+       function hsla(h, s, l, a) {
+         if (a <= 0) h = s = l = NaN;else if (l <= 0 || l >= 1) h = s = NaN;else if (s <= 0) h = NaN;
+         return new Hsl(h, s, l, a);
+       }

 
 

-             var aStart = bounds.a[0] + (regionStart - bounds.a[2]);
-             var aEnd = bounds.a[1] + (regionEnd - bounds.a[3]);
-             var bStart = bounds.b[0] + (regionStart - bounds.b[2]);
-             var bEnd = bounds.b[1] + (regionEnd - bounds.b[3]);
+       function hslConvert(o) {
+         if (o instanceof Hsl) return new Hsl(o.h, o.s, o.l, o.opacity);
+         if (!(o instanceof Color)) o = color(o);
+         if (!o) return new Hsl();
+         if (o instanceof Hsl) return o;
+         o = o.rgb();
+         var r = o.r / 255,
+             g = o.g / 255,
+             b = o.b / 255,
+             min = Math.min(r, g, b),
+             max = Math.max(r, g, b),
+             h = NaN,
+             s = max - min,
+             l = (max + min) / 2;

 
 

-             var result = {
-               stable: false,
-               aStart: aStart,
-               aLength: aEnd - aStart,
-               aContent: a.slice(aStart, aEnd),
-               oStart: regionStart,
-               oLength: regionEnd - regionStart,
-               oContent: o.slice(regionStart, regionEnd),
-               bStart: bStart,
-               bLength: bEnd - bStart,
-               bContent: b.slice(bStart, bEnd)
-             };
-             results.push(result);
-           }
-           currOffset = regionEnd;
+         if (s) {
+           if (r === max) h = (g - b) / s + (g < b) * 6;else if (g === max) h = (b - r) / s + 2;else h = (r - g) / s + 4;
+           s /= l < 0.5 ? max + min : 2 - max - min;
+           h *= 60;
+         } else {
+           s = l > 0 && l < 1 ? 0 : h;

          }
 
          }
 

-         advanceTo(o.length);
+         return new Hsl(h, s, l, o.opacity);
+       }
+       function hsl(h, s, l, opacity) {
+         return arguments.length === 1 ? hslConvert(h) : new Hsl(h, s, l, opacity == null ? 1 : opacity);
+       }

 
 

-         return results;
+       function Hsl(h, s, l, opacity) {
+         this.h = +h;
+         this.s = +s;
+         this.l = +l;
+         this.opacity = +opacity;

        }
 
        }
 

+       define(Hsl, hsl, extend$3(Color, {
+         brighter: function brighter(k) {
+           k = k == null ? _brighter : Math.pow(_brighter, k);
+           return new Hsl(this.h, this.s, this.l * k, this.opacity);
+         },
+         darker: function darker(k) {
+           k = k == null ? _darker : Math.pow(_darker, k);
+           return new Hsl(this.h, this.s, this.l * k, this.opacity);
+         },
+         rgb: function rgb() {
+           var h = this.h % 360 + (this.h < 0) * 360,
+               s = isNaN(h) || isNaN(this.s) ? 0 : this.s,
+               l = this.l,
+               m2 = l + (l < 0.5 ? l : 1 - l) * s,
+               m1 = 2 * l - m2;
+           return new Rgb(hsl2rgb(h >= 240 ? h - 240 : h + 120, m1, m2), hsl2rgb(h, m1, m2), hsl2rgb(h < 120 ? h + 240 : h - 120, m1, m2), this.opacity);
+         },
+         displayable: function displayable() {
+           return (0 <= this.s && this.s <= 1 || isNaN(this.s)) && 0 <= this.l && this.l <= 1 && 0 <= this.opacity && this.opacity <= 1;
+         },
+         formatHsl: function formatHsl() {
+           var a = this.opacity;
+           a = isNaN(a) ? 1 : Math.max(0, Math.min(1, a));
+           return (a === 1 ? "hsl(" : "hsla(") + (this.h || 0) + ", " + (this.s || 0) * 100 + "%, " + (this.l || 0) * 100 + "%" + (a === 1 ? ")" : ", " + a + ")");
+         }
+       }));
+       /* From FvD 13.37, CSS Color Module Level 3 */
+
+       function hsl2rgb(h, m1, m2) {
+         return (h < 60 ? m1 + (m2 - m1) * h / 60 : h < 180 ? m2 : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60 : m1) * 255;
+       }

 
 

-       // Applies the output of diff3MergeRegions to actually
-       // construct the merged buffer; the returned result alternates
-       // between 'ok' and 'conflict' blocks.
-       // A "false conflict" is where `a` and `b` both change the same from `o`
-       function diff3Merge(a, o, b, options) {
-         var defaults = {
-           excludeFalseConflicts: true,
-           stringSeparator: /\s+/
+       var constant$1 = (function (x) {
+         return function () {
+           return x;

          };
          };

-         options = Object.assign(defaults, options);
+       });

 
 

-         var aString = (typeof a === 'string');
-         var oString = (typeof o === 'string');
-         var bString = (typeof b === 'string');
+       function linear$2(a, d) {
+         return function (t) {
+           return a + t * d;
+         };
+       }

 
 

-         if (aString) { a = a.split(options.stringSeparator); }
-         if (oString) { o = o.split(options.stringSeparator); }
-         if (bString) { b = b.split(options.stringSeparator); }
+       function exponential(a, b, y) {
+         return a = Math.pow(a, y), b = Math.pow(b, y) - a, y = 1 / y, function (t) {
+           return Math.pow(a + t * b, y);
+         };
+       }
+       function gamma(y) {
+         return (y = +y) === 1 ? nogamma : function (a, b) {
+           return b - a ? exponential(a, b, y) : constant$1(isNaN(a) ? b : a);
+         };
+       }
+       function nogamma(a, b) {
+         var d = b - a;
+         return d ? linear$2(a, d) : constant$1(isNaN(a) ? b : a);
+       }

 
 

-         var results = [];
-         var regions = diff3MergeRegions(a, o, b);
+       var d3_interpolateRgb = (function rgbGamma(y) {
+         var color = gamma(y);

 
 

-         var okBuffer = [];
-         function flushOk() {
-           if (okBuffer.length) {
-             results.push({ ok: okBuffer });
-           }
-           okBuffer = [];
+         function rgb$1(start, end) {
+           var r = color((start = rgb(start)).r, (end = rgb(end)).r),
+               g = color(start.g, end.g),
+               b = color(start.b, end.b),
+               opacity = nogamma(start.opacity, end.opacity);
+           return function (t) {
+             start.r = r(t);
+             start.g = g(t);
+             start.b = b(t);
+             start.opacity = opacity(t);
+             return start + "";
+           };

          }
 
          }
 

-         function isFalseConflict(a, b) {
-           if (a.length !== b.length) { return false; }
-           for (var i = 0; i < a.length; i++) {
-             if (a[i] !== b[i]) { return false; }
-           }
-           return true;
-         }
+         rgb$1.gamma = rgbGamma;
+         return rgb$1;
+       })(1);

 
 

-         regions.forEach(function (region) {
-           if (region.stable) {
-             okBuffer.push.apply(okBuffer, region.bufferContent);
-           } else {
-             if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
-               okBuffer.push.apply(okBuffer, region.aContent);
-             } else {
-               flushOk();
-               results.push({
-                 conflict: {
-                   a: region.aContent,
-                   aIndex: region.aStart,
-                   o: region.oContent,
-                   oIndex: region.oStart,
-                   b: region.bContent,
-                   bIndex: region.bStart
-                 }
-               });
-             }
+       function numberArray (a, b) {
+         if (!b) b = [];
+         var n = a ? Math.min(b.length, a.length) : 0,
+             c = b.slice(),
+             i;
+         return function (t) {
+           for (i = 0; i < n; ++i) {
+             c[i] = a[i] * (1 - t) + b[i] * t;

            }
            }

-         });

 
 

-         flushOk();
-         return results;
+           return c;
+         };
+       }
+       function isNumberArray(x) {
+         return ArrayBuffer.isView(x) && !(x instanceof DataView);

        }
 
        }
 

-       function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
-           discardTags = discardTags || {};
-           var _option = 'safe';  // 'safe', 'force_local', 'force_remote'
-           var _conflicts = [];
-
-
-           function user(d) {
-               return (typeof formatUser === 'function') ? formatUser(d) : d;
-           }
-
+       function genericArray(a, b) {
+         var nb = b ? b.length : 0,
+             na = a ? Math.min(nb, a.length) : 0,
+             x = new Array(na),
+             c = new Array(nb),
+             i;

 
 

-           function mergeLocation(remote, target) {
-               function pointEqual(a, b) {
-                   var epsilon = 1e-6;
-                   return (Math.abs(a[0] - b[0]) < epsilon) && (Math.abs(a[1] - b[1]) < epsilon);
-               }
+         for (i = 0; i < na; ++i) {
+           x[i] = interpolate$1(a[i], b[i]);
+         }

 
 

-               if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
-                   return target;
-               }
-               if (_option === 'force_remote') {
-                   return target.update({loc: remote.loc});
-               }
+         for (; i < nb; ++i) {
+           c[i] = b[i];
+         }

 
 

-               _conflicts.push(_t('merge_remote_changes.conflict.location', { user: user(remote.user) }));
-               return target;
+         return function (t) {
+           for (i = 0; i < na; ++i) {
+             c[i] = x[i](t);

            }
 
            }
 

+           return c;
+         };
+       }

 
 

-           function mergeNodes(base, remote, target) {
-               if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
-                   return target;
-               }
-               if (_option === 'force_remote') {
-                   return target.update({nodes: remote.nodes});
-               }
+       function date (a, b) {
+         var d = new Date();
+         return a = +a, b = +b, function (t) {
+           return d.setTime(a * (1 - t) + b * t), d;
+         };
+       }

 
 

-               var ccount = _conflicts.length;
-               var o = base.nodes || [];
-               var a = target.nodes || [];
-               var b = remote.nodes || [];
-               var nodes = [];
-               var hunks = diff3Merge(a, o, b, { excludeFalseConflicts: true });
+       function d3_interpolateNumber (a, b) {
+         return a = +a, b = +b, function (t) {
+           return a * (1 - t) + b * t;
+         };
+       }

 
 

-               for (var i = 0; i < hunks.length; i++) {
-                   var hunk = hunks[i];
-                   if (hunk.ok) {
-                       nodes.push.apply(nodes, hunk.ok);
-                   } else {
-                       // for all conflicts, we can assume c.a !== c.b
-                       // because `diff3Merge` called with `true` option to exclude false conflicts..
-                       var c = hunk.conflict;
-                       if (fastDeepEqual(c.o, c.a)) {  // only changed remotely
-                           nodes.push.apply(nodes, c.b);
-                       } else if (fastDeepEqual(c.o, c.b)) {  // only changed locally
-                           nodes.push.apply(nodes, c.a);
-                       } else {       // changed both locally and remotely
-                           _conflicts.push(_t('merge_remote_changes.conflict.nodelist', { user: user(remote.user) }));
-                           break;
-                       }
-                   }
-               }
+       function object (a, b) {
+         var i = {},
+             c = {},
+             k;
+         if (a === null || _typeof(a) !== "object") a = {};
+         if (b === null || _typeof(b) !== "object") b = {};

 
 

-               return (_conflicts.length === ccount) ? target.update({nodes: nodes}) : target;
+         for (k in b) {
+           if (k in a) {
+             i[k] = interpolate$1(a[k], b[k]);
+           } else {
+             c[k] = b[k];

            }
            }

+         }

 
 

+         return function (t) {
+           for (k in i) {
+             c[k] = i[k](t);
+           }

 
 

-           function mergeChildren(targetWay, children, updates, graph) {
-               function isUsed(node, targetWay) {
-                   var hasInterestingParent = graph.parentWays(node)
-                       .some(function(way) { return way.id !== targetWay.id; });
-
-                   return node.hasInterestingTags() ||
-                       hasInterestingParent ||
-                       graph.parentRelations(node).length > 0;
-               }
-
-               var ccount = _conflicts.length;
-
-               for (var i = 0; i < children.length; i++) {
-                   var id = children[i];
-                   var node = graph.hasEntity(id);
+           return c;
+         };
+       }

 
 

-                   // remove unused childNodes..
-                   if (targetWay.nodes.indexOf(id) === -1) {
-                       if (node && !isUsed(node, targetWay)) {
-                           updates.removeIds.push(id);
-                       }
-                       continue;
-                   }
+       var reA = /[-+]?(?:\d+\.?\d*|\.?\d+)(?:[eE][-+]?\d+)?/g,
+           reB = new RegExp(reA.source, "g");

 
 

-                   // restore used childNodes..
-                   var local = localGraph.hasEntity(id);
-                   var remote = remoteGraph.hasEntity(id);
-                   var target;
+       function zero(b) {
+         return function () {
+           return b;
+         };
+       }

 
 

-                   if (_option === 'force_remote' && remote && remote.visible) {
-                       updates.replacements.push(remote);
+       function one(b) {
+         return function (t) {
+           return b(t) + "";
+         };
+       }

 
 

-                   } else if (_option === 'force_local' && local) {
-                       target = osmEntity(local);
-                       if (remote) {
-                           target = target.update({ version: remote.version });
-                       }
-                       updates.replacements.push(target);
+       function interpolateString (a, b) {
+         var bi = reA.lastIndex = reB.lastIndex = 0,
+             // scan index for next number in b
+         am,
+             // current match in a
+         bm,
+             // current match in b
+         bs,
+             // string preceding current number in b, if any
+         i = -1,
+             // index in s
+         s = [],
+             // string constants and placeholders
+         q = []; // number interpolators
+         // Coerce inputs to strings.

 
 

-                   } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
-                       target = osmEntity(local, { version: remote.version });
-                       if (remote.visible) {
-                           target = mergeLocation(remote, target);
-                       } else {
-                           _conflicts.push(_t('merge_remote_changes.conflict.deleted', { user: user(remote.user) }));
-                       }
+         a = a + "", b = b + ""; // Interpolate pairs of numbers in a & b.

 
 

-                       if (_conflicts.length !== ccount) { break; }
-                       updates.replacements.push(target);
-                   }
-               }
+         while ((am = reA.exec(a)) && (bm = reB.exec(b))) {
+           if ((bs = bm.index) > bi) {
+             // a string precedes the next number in b
+             bs = b.slice(bi, bs);
+             if (s[i]) s[i] += bs; // coalesce with previous string
+             else s[++i] = bs;
+           }

 
 

-               return targetWay;
+           if ((am = am[0]) === (bm = bm[0])) {
+             // numbers in a & b match
+             if (s[i]) s[i] += bm; // coalesce with previous string
+             else s[++i] = bm;
+           } else {
+             // interpolate non-matching numbers
+             s[++i] = null;
+             q.push({
+               i: i,
+               x: d3_interpolateNumber(am, bm)
+             });

            }
 
            }
 

+           bi = reB.lastIndex;
+         } // Add remains of b.

 
 

-           function updateChildren(updates, graph) {
-               for (var i = 0; i < updates.replacements.length; i++) {
-                   graph = graph.replace(updates.replacements[i]);
-               }
-               if (updates.removeIds.length) {
-                   graph = actionDeleteMultiple(updates.removeIds)(graph);
-               }
-               return graph;
-           }

 
 

+         if (bi < b.length) {
+           bs = b.slice(bi);
+           if (s[i]) s[i] += bs; // coalesce with previous string
+           else s[++i] = bs;
+         } // Special optimization for only a single match.
+         // Otherwise, interpolate each of the numbers and rejoin the string.

 
 

-           function mergeMembers(remote, target) {
-               if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
-                   return target;
-               }
-               if (_option === 'force_remote') {
-                   return target.update({members: remote.members});
-               }

 
 

-               _conflicts.push(_t('merge_remote_changes.conflict.memberlist', { user: user(remote.user) }));
-               return target;
+         return s.length < 2 ? q[0] ? one(q[0].x) : zero(b) : (b = q.length, function (t) {
+           for (var i = 0, o; i < b; ++i) {
+             s[(o = q[i]).i] = o.x(t);

            }
 
            }
 

+           return s.join("");
+         });
+       }

 
 

-           function mergeTags(base, remote, target) {
-               if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
-                   return target;
-               }
-               if (_option === 'force_remote') {
-                   return target.update({tags: remote.tags});
-               }
+       function interpolate$1 (a, b) {
+         var t = _typeof(b),
+             c;

 
 

-               var ccount = _conflicts.length;
-               var o = base.tags || {};
-               var a = target.tags || {};
-               var b = remote.tags || {};
-               var keys = utilArrayUnion(utilArrayUnion(Object.keys(o), Object.keys(a)), Object.keys(b))
-                   .filter(function(k) { return !discardTags[k]; });
-               var tags = Object.assign({}, a);   // shallow copy
-               var changed = false;
+         return b == null || t === "boolean" ? constant$1(b) : (t === "number" ? d3_interpolateNumber : t === "string" ? (c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString : b instanceof color ? d3_interpolateRgb : b instanceof Date ? date : isNumberArray(b) ? numberArray : Array.isArray(b) ? genericArray : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object : d3_interpolateNumber)(a, b);
+       }

 
 

-               for (var i = 0; i < keys.length; i++) {
-                   var k = keys[i];
+       function interpolateRound (a, b) {
+         return a = +a, b = +b, function (t) {
+           return Math.round(a * (1 - t) + b * t);
+         };
+       }

 
 

-                   if (o[k] !== b[k] && a[k] !== b[k]) {    // changed remotely..
-                       if (o[k] !== a[k]) {      // changed locally..
-                           _conflicts.push(_t('merge_remote_changes.conflict.tags',
-                               { tag: k, local: a[k], remote: b[k], user: user(remote.user) }));
+       var degrees = 180 / Math.PI;
+       var identity$3 = {
+         translateX: 0,
+         translateY: 0,
+         rotate: 0,
+         skewX: 0,
+         scaleX: 1,
+         scaleY: 1
+       };
+       function decompose (a, b, c, d, e, f) {
+         var scaleX, scaleY, skewX;
+         if (scaleX = Math.sqrt(a * a + b * b)) a /= scaleX, b /= scaleX;
+         if (skewX = a * c + b * d) c -= a * skewX, d -= b * skewX;
+         if (scaleY = Math.sqrt(c * c + d * d)) c /= scaleY, d /= scaleY, skewX /= scaleY;
+         if (a * d < b * c) a = -a, b = -b, skewX = -skewX, scaleX = -scaleX;
+         return {
+           translateX: e,
+           translateY: f,
+           rotate: Math.atan2(b, a) * degrees,
+           skewX: Math.atan(skewX) * degrees,
+           scaleX: scaleX,
+           scaleY: scaleY
+         };
+       }

 
 

-                       } else {                  // unchanged locally, accept remote change..
-                           if (b.hasOwnProperty(k)) {
-                               tags[k] = b[k];
-                           } else {
-                               delete tags[k];
-                           }
-                           changed = true;
-                       }
-                   }
-               }
+       var svgNode;
+       /* eslint-disable no-undef */

 
 

-               return (changed && _conflicts.length === ccount) ? target.update({tags: tags}) : target;
-           }
+       function parseCss(value) {
+         var m = new (typeof DOMMatrix === "function" ? DOMMatrix : WebKitCSSMatrix)(value + "");
+         return m.isIdentity ? identity$3 : decompose(m.a, m.b, m.c, m.d, m.e, m.f);
+       }
+       function parseSvg(value) {
+         if (value == null) return identity$3;
+         if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
+         svgNode.setAttribute("transform", value);
+         if (!(value = svgNode.transform.baseVal.consolidate())) return identity$3;
+         value = value.matrix;
+         return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
+       }

 
 

+       function interpolateTransform(parse, pxComma, pxParen, degParen) {
+         function pop(s) {
+           return s.length ? s.pop() + " " : "";
+         }

 
 

-           //  `graph.base()` is the common ancestor of the two graphs.
-           //  `localGraph` contains user's edits up to saving
-           //  `remoteGraph` contains remote edits to modified nodes
-           //  `graph` must be a descendent of `localGraph` and may include
-           //      some conflict resolution actions performed on it.
-           //
-           //                  --- ... --- `localGraph` -- ... -- `graph`
-           //                 /
-           //  `graph.base()` --- ... --- `remoteGraph`
-           //
-           var action = function(graph) {
-               var updates = { replacements: [], removeIds: [] };
-               var base = graph.base().entities[id];
-               var local = localGraph.entity(id);
-               var remote = remoteGraph.entity(id);
-               var target = osmEntity(local, { version: remote.version });
+         function translate(xa, ya, xb, yb, s, q) {
+           if (xa !== xb || ya !== yb) {
+             var i = s.push("translate(", null, pxComma, null, pxParen);
+             q.push({
+               i: i - 4,
+               x: d3_interpolateNumber(xa, xb)
+             }, {
+               i: i - 2,
+               x: d3_interpolateNumber(ya, yb)
+             });
+           } else if (xb || yb) {
+             s.push("translate(" + xb + pxComma + yb + pxParen);
+           }
+         }

 
 

-               // delete/undelete
-               if (!remote.visible) {
-                   if (_option === 'force_remote') {
-                       return actionDeleteMultiple([id])(graph);
+         function rotate(a, b, s, q) {
+           if (a !== b) {
+             if (a - b > 180) b += 360;else if (b - a > 180) a += 360; // shortest path

 
 

-                   } else if (_option === 'force_local') {
-                       if (target.type === 'way') {
-                           target = mergeChildren(target, utilArrayUniq(local.nodes), updates, graph);
-                           graph = updateChildren(updates, graph);
-                       }
-                       return graph.replace(target);
+             q.push({
+               i: s.push(pop(s) + "rotate(", null, degParen) - 2,
+               x: d3_interpolateNumber(a, b)
+             });
+           } else if (b) {
+             s.push(pop(s) + "rotate(" + b + degParen);
+           }
+         }

 
 

-                   } else {
-                       _conflicts.push(_t('merge_remote_changes.conflict.deleted', { user: user(remote.user) }));
-                       return graph;  // do nothing
-                   }
-               }
+         function skewX(a, b, s, q) {
+           if (a !== b) {
+             q.push({
+               i: s.push(pop(s) + "skewX(", null, degParen) - 2,
+               x: d3_interpolateNumber(a, b)
+             });
+           } else if (b) {
+             s.push(pop(s) + "skewX(" + b + degParen);
+           }
+         }

 
 

-               // merge
-               if (target.type === 'node') {
-                   target = mergeLocation(remote, target);
+         function scale(xa, ya, xb, yb, s, q) {
+           if (xa !== xb || ya !== yb) {
+             var i = s.push(pop(s) + "scale(", null, ",", null, ")");
+             q.push({
+               i: i - 4,
+               x: d3_interpolateNumber(xa, xb)
+             }, {
+               i: i - 2,
+               x: d3_interpolateNumber(ya, yb)
+             });
+           } else if (xb !== 1 || yb !== 1) {
+             s.push(pop(s) + "scale(" + xb + "," + yb + ")");
+           }
+         }

 
 

-               } else if (target.type === 'way') {
-                   // pull in any child nodes that may not be present locally..
-                   graph.rebase(remoteGraph.childNodes(remote), [graph], false);
-                   target = mergeNodes(base, remote, target);
-                   target = mergeChildren(target, utilArrayUnion(local.nodes, remote.nodes), updates, graph);
+         return function (a, b) {
+           var s = [],
+               // string constants and placeholders
+           q = []; // number interpolators

 
 

-               } else if (target.type === 'relation') {
-                   target = mergeMembers(remote, target);
-               }
+           a = parse(a), b = parse(b);
+           translate(a.translateX, a.translateY, b.translateX, b.translateY, s, q);
+           rotate(a.rotate, b.rotate, s, q);
+           skewX(a.skewX, b.skewX, s, q);
+           scale(a.scaleX, a.scaleY, b.scaleX, b.scaleY, s, q);
+           a = b = null; // gc

 
 

-               target = mergeTags(base, remote, target);
+           return function (t) {
+             var i = -1,
+                 n = q.length,
+                 o;

 
 

-               if (!_conflicts.length) {
-                   graph = updateChildren(updates, graph).replace(target);
-               }
+             while (++i < n) {
+               s[(o = q[i]).i] = o.x(t);
+             }

 
 

-               return graph;
+             return s.join("");

            };
            };

+         };
+       }

 
 

+       var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
+       var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");

 
 

-           action.withOption = function(opt) {
-               _option = opt;
-               return action;
-           };
-
+       var epsilon2 = 1e-12;

 
 

-           action.conflicts = function() {
-               return _conflicts;
-           };
+       function cosh(x) {
+         return ((x = Math.exp(x)) + 1 / x) / 2;
+       }

 
 

+       function sinh(x) {
+         return ((x = Math.exp(x)) - 1 / x) / 2;
+       }

 
 

-           return action;
+       function tanh(x) {
+         return ((x = Math.exp(2 * x)) - 1) / (x + 1);

        }
 
        }
 

-       // https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/command/MoveCommand.java
-       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
-       function actionMove(moveIDs, tryDelta, projection, cache) {
-           var _delta = tryDelta;
+       var interpolateZoom = (function zoomRho(rho, rho2, rho4) {
+         // p0 = [ux0, uy0, w0]
+         // p1 = [ux1, uy1, w1]
+         function zoom(p0, p1) {
+           var ux0 = p0[0],
+               uy0 = p0[1],
+               w0 = p0[2],
+               ux1 = p1[0],
+               uy1 = p1[1],
+               w1 = p1[2],
+               dx = ux1 - ux0,
+               dy = uy1 - uy0,
+               d2 = dx * dx + dy * dy,
+               i,
+               S; // Special case for u0 ≅ u1.
+
+           if (d2 < epsilon2) {
+             S = Math.log(w1 / w0) / rho;
+
+             i = function i(t) {
+               return [ux0 + t * dx, uy0 + t * dy, w0 * Math.exp(rho * t * S)];
+             };
+           } // General case.
+           else {
+               var d1 = Math.sqrt(d2),
+                   b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
+                   b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
+                   r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
+                   r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
+               S = (r1 - r0) / rho;
+
+               i = function i(t) {
+                 var s = t * S,
+                     coshr0 = cosh(r0),
+                     u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
+                 return [ux0 + u * dx, uy0 + u * dy, w0 * coshr0 / cosh(rho * s + r0)];
+               };
+             }

 
 

-           function setupCache(graph) {
-               function canMove(nodeID) {
-                   // Allow movement of any node that is in the selectedIDs list..
-                   if (moveIDs.indexOf(nodeID) !== -1) { return true; }
+           i.duration = S * 1000 * rho / Math.SQRT2;
+           return i;
+         }

 
 

-                   // Allow movement of a vertex where 2 ways meet..
-                   var parents = graph.parentWays(graph.entity(nodeID));
-                   if (parents.length < 3) { return true; }
+         zoom.rho = function (_) {
+           var _1 = Math.max(1e-3, +_),
+               _2 = _1 * _1,
+               _4 = _2 * _2;

 
 

-                   // Restrict movement of a vertex where >2 ways meet, unless all parentWays are moving too..
-                   var parentsMoving = parents.every(function(way) { return cache.moving[way.id]; });
-                   if (!parentsMoving) { delete cache.moving[nodeID]; }
+           return zoomRho(_1, _2, _4);
+         };

 
 

-                   return parentsMoving;
-               }
+         return zoom;
+       })(Math.SQRT2, 2, 4);

 
 

-               function cacheEntities(ids) {
-                   for (var i = 0; i < ids.length; i++) {
-                       var id = ids[i];
-                       if (cache.moving[id]) { continue; }
-                       cache.moving[id] = true;
+       function d3_quantize (interpolator, n) {
+         var samples = new Array(n);

 
 

-                       var entity = graph.hasEntity(id);
-                       if (!entity) { continue; }
+         for (var i = 0; i < n; ++i) {
+           samples[i] = interpolator(i / (n - 1));
+         }

 
 

-                       if (entity.type === 'node') {
-                           cache.nodes.push(id);
-                           cache.startLoc[id] = entity.loc;
-                       } else if (entity.type === 'way') {
-                           cache.ways.push(id);
-                           cacheEntities(entity.nodes);
-                       } else {
-                           cacheEntities(entity.members.map(function(member) {
-                               return member.id;
-                           }));
-                       }
-                   }
-               }
+         return samples;
+       }

 
 

-               function cacheIntersections(ids) {
-                   function isEndpoint(way, id) {
-                       return !way.isClosed() && !!way.affix(id);
-                   }
+       var $$m = _export;
+       var bind$2 = functionBind;

 
 

-                   for (var i = 0; i < ids.length; i++) {
-                       var id = ids[i];
-
-                       // consider only intersections with 1 moved and 1 unmoved way.
-                       var childNodes = graph.childNodes(graph.entity(id));
-                       for (var j = 0; j < childNodes.length; j++) {
-                           var node = childNodes[j];
-                           var parents = graph.parentWays(node);
-                           if (parents.length !== 2) { continue; }
-
-                           var moved = graph.entity(id);
-                           var unmoved = null;
-                           for (var k = 0; k < parents.length; k++) {
-                               var way = parents[k];
-                               if (!cache.moving[way.id]) {
-                                   unmoved = way;
-                                   break;
-                               }
-                           }
-                           if (!unmoved) { continue; }
-
-                           // exclude ways that are overly connected..
-                           if (utilArrayIntersection(moved.nodes, unmoved.nodes).length > 2) { continue; }
-                           if (moved.isArea() || unmoved.isArea()) { continue; }
-
-                           cache.intersections.push({
-                               nodeId: node.id,
-                               movedId: moved.id,
-                               unmovedId: unmoved.id,
-                               movedIsEP: isEndpoint(moved, node.id),
-                               unmovedIsEP: isEndpoint(unmoved, node.id)
-                           });
-                       }
-                   }
-               }
+       // `Function.prototype.bind` method
+       // https://tc39.es/ecma262/#sec-function.prototype.bind
+       $$m({ target: 'Function', proto: true }, {
+         bind: bind$2
+       });

 
 

+       var frame = 0,
+           // is an animation frame pending?
+       timeout = 0,
+           // is a timeout pending?
+       interval = 0,
+           // are any timers active?
+       pokeDelay = 1000,
+           // how frequently we check for clock skew
+       taskHead,
+           taskTail,
+           clockLast = 0,
+           clockNow = 0,
+           clockSkew = 0,
+           clock = (typeof performance === "undefined" ? "undefined" : _typeof(performance)) === "object" && performance.now ? performance : Date,
+           setFrame = (typeof window === "undefined" ? "undefined" : _typeof(window)) === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function (f) {
+         setTimeout(f, 17);
+       };
+       function now$1() {
+         return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
+       }

 
 

-               if (!cache) {
-                   cache = {};
-               }
-               if (!cache.ok) {
-                   cache.moving = {};
-                   cache.intersections = [];
-                   cache.replacedVertex = {};
-                   cache.startLoc = {};
-                   cache.nodes = [];
-                   cache.ways = [];
+       function clearNow() {
+         clockNow = 0;
+       }

 
 

-                   cacheEntities(moveIDs);
-                   cacheIntersections(cache.ways);
-                   cache.nodes = cache.nodes.filter(canMove);
+       function Timer() {
+         this._call = this._time = this._next = null;
+       }
+       Timer.prototype = timer.prototype = {
+         constructor: Timer,
+         restart: function restart(callback, delay, time) {
+           if (typeof callback !== "function") throw new TypeError("callback is not a function");
+           time = (time == null ? now$1() : +time) + (delay == null ? 0 : +delay);

 
 

-                   cache.ok = true;
-               }
+           if (!this._next && taskTail !== this) {
+             if (taskTail) taskTail._next = this;else taskHead = this;
+             taskTail = this;

            }
 
            }
 

+           this._call = callback;
+           this._time = time;
+           sleep();
+         },
+         stop: function stop() {
+           if (this._call) {
+             this._call = null;
+             this._time = Infinity;
+             sleep();
+           }
+         }
+       };
+       function timer(callback, delay, time) {
+         var t = new Timer();
+         t.restart(callback, delay, time);
+         return t;
+       }
+       function timerFlush() {
+         now$1(); // Get the current time, if not already set.

 
 

-           // Place a vertex where the moved vertex used to be, to preserve way shape..
-           //
-           //  Start:
-           //      b ---- e
-           //     / \
-           //    /   \
-           //   /     \
-           //  a       c
-           //
-           //      *               node '*' added to preserve shape
-           //     / \
-           //    /   b ---- e      way `b,e` moved here:
-           //   /     \
-           //  a       c
-           //
-           //
-           function replaceMovedVertex(nodeId, wayId, graph, delta) {
-               var way = graph.entity(wayId);
-               var moved = graph.entity(nodeId);
-               var movedIndex = way.nodes.indexOf(nodeId);
-               var len, prevIndex, nextIndex;
-
-               if (way.isClosed()) {
-                   len = way.nodes.length - 1;
-                   prevIndex = (movedIndex + len - 1) % len;
-                   nextIndex = (movedIndex + len + 1) % len;
-               } else {
-                   len = way.nodes.length;
-                   prevIndex = movedIndex - 1;
-                   nextIndex = movedIndex + 1;
-               }
-
-               var prev = graph.hasEntity(way.nodes[prevIndex]);
-               var next = graph.hasEntity(way.nodes[nextIndex]);
+         ++frame; // Pretend we’ve set an alarm, if we haven’t already.

 
 

-               // Don't add orig vertex at endpoint..
-               if (!prev || !next) { return graph; }
+         var t = taskHead,
+             e;

 
 

-               var key = wayId + '_' + nodeId;
-               var orig = cache.replacedVertex[key];
-               if (!orig) {
-                   orig = osmNode();
-                   cache.replacedVertex[key] = orig;
-                   cache.startLoc[orig.id] = cache.startLoc[nodeId];
-               }
+         while (t) {
+           if ((e = clockNow - t._time) >= 0) t._call.call(null, e);
+           t = t._next;
+         }

 
 

-               var start, end;
-               if (delta) {
-                   start = projection(cache.startLoc[nodeId]);
-                   end = projection.invert(geoVecAdd(start, delta));
-               } else {
-                   end = cache.startLoc[nodeId];
-               }
-               orig = orig.move(end);
+         --frame;
+       }

 
 

-               var angle = Math.abs(geoAngle(orig, prev, projection) -
-                       geoAngle(orig, next, projection)) * 180 / Math.PI;
+       function wake() {
+         clockNow = (clockLast = clock.now()) + clockSkew;
+         frame = timeout = 0;

 
 

-               // Don't add orig vertex if it would just make a straight line..
-               if (angle > 175 && angle < 185) { return graph; }
+         try {
+           timerFlush();
+         } finally {
+           frame = 0;
+           nap();
+           clockNow = 0;
+         }
+       }

 
 

-               // moving forward or backward along way?
-               var p1 = [prev.loc, orig.loc, moved.loc, next.loc].map(projection);
-               var p2 = [prev.loc, moved.loc, orig.loc, next.loc].map(projection);
-               var d1 = geoPathLength(p1);
-               var d2 = geoPathLength(p2);
-               var insertAt = (d1 <= d2) ? movedIndex : nextIndex;
+       function poke() {
+         var now = clock.now(),
+             delay = now - clockLast;
+         if (delay > pokeDelay) clockSkew -= delay, clockLast = now;
+       }

 
 

-               // moving around closed loop?
-               if (way.isClosed() && insertAt === 0) { insertAt = len; }
+       function nap() {
+         var t0,
+             t1 = taskHead,
+             t2,
+             time = Infinity;

 
 

-               way = way.addNode(orig.id, insertAt);
-               return graph.replace(orig).replace(way);
+         while (t1) {
+           if (t1._call) {
+             if (time > t1._time) time = t1._time;
+             t0 = t1, t1 = t1._next;
+           } else {
+             t2 = t1._next, t1._next = null;
+             t1 = t0 ? t0._next = t2 : taskHead = t2;

            }
            }

+         }

 
 

+         taskTail = t0;
+         sleep(time);
+       }

 
 

-           // Remove duplicate vertex that might have been added by
-           // replaceMovedVertex.  This is done after the unzorro checks.
-           function removeDuplicateVertices(wayId, graph) {
-               var way = graph.entity(wayId);
-               var epsilon = 1e-6;
-               var prev, curr;
-
-               function isInteresting(node, graph) {
-                   return graph.parentWays(node).length > 1 ||
-                       graph.parentRelations(node).length ||
-                       node.hasInterestingTags();
-               }
-
-               for (var i = 0; i < way.nodes.length; i++) {
-                   curr = graph.entity(way.nodes[i]);
+       function sleep(time) {
+         if (frame) return; // Soonest alarm already set, or will be.

 
 

-                   if (prev && curr && geoVecEqual(prev.loc, curr.loc, epsilon)) {
-                       if (!isInteresting(prev, graph)) {
-                           way = way.removeNode(prev.id);
-                           graph = graph.replace(way).remove(prev);
-                       } else if (!isInteresting(curr, graph)) {
-                           way = way.removeNode(curr.id);
-                           graph = graph.replace(way).remove(curr);
-                       }
-                   }
+         if (timeout) timeout = clearTimeout(timeout);
+         var delay = time - clockNow; // Strictly less than if we recomputed clockNow.

 
 

-                   prev = curr;
-               }
+         if (delay > 24) {
+           if (time < Infinity) timeout = setTimeout(wake, time - clock.now() - clockSkew);
+           if (interval) interval = clearInterval(interval);
+         } else {
+           if (!interval) clockLast = clock.now(), interval = setInterval(poke, pokeDelay);
+           frame = 1, setFrame(wake);
+         }
+       }

 
 

-               return graph;
-           }
+       function d3_timeout (callback, delay, time) {
+         var t = new Timer();
+         delay = delay == null ? 0 : +delay;
+         t.restart(function (elapsed) {
+           t.stop();
+           callback(elapsed + delay);
+         }, delay, time);
+         return t;
+       }

 
 

+       var emptyOn = dispatch$8("start", "end", "cancel", "interrupt");
+       var emptyTween = [];
+       var CREATED = 0;
+       var SCHEDULED = 1;
+       var STARTING = 2;
+       var STARTED = 3;
+       var RUNNING = 4;
+       var ENDING = 5;
+       var ENDED = 6;
+       function schedule (node, name, id, index, group, timing) {
+         var schedules = node.__transition;
+         if (!schedules) node.__transition = {};else if (id in schedules) return;
+         create$3(node, id, {
+           name: name,
+           index: index,
+           // For context during callback.
+           group: group,
+           // For context during callback.
+           on: emptyOn,
+           tween: emptyTween,
+           time: timing.time,
+           delay: timing.delay,
+           duration: timing.duration,
+           ease: timing.ease,
+           timer: null,
+           state: CREATED
+         });
+       }
+       function init(node, id) {
+         var schedule = get$1(node, id);
+         if (schedule.state > CREATED) throw new Error("too late; already scheduled");
+         return schedule;
+       }
+       function set(node, id) {
+         var schedule = get$1(node, id);
+         if (schedule.state > STARTED) throw new Error("too late; already running");
+         return schedule;
+       }
+       function get$1(node, id) {
+         var schedule = node.__transition;
+         if (!schedule || !(schedule = schedule[id])) throw new Error("transition not found");
+         return schedule;
+       }

 
 

-           // Reorder nodes around intersections that have moved..
-           //
-           //  Start:                way1.nodes: b,e         (moving)
-           //  a - b - c ----- d     way2.nodes: a,b,c,d     (static)
-           //      |                 vertex: b
-           //      e                 isEP1: true,  isEP2, false
-           //
-           //  way1 `b,e` moved here:
-           //  a ----- c = b - d
-           //              |
-           //              e
-           //
-           //  reorder nodes         way1.nodes: b,e
-           //  a ----- c - b - d     way2.nodes: a,c,b,d
-           //              |
-           //              e
-           //
-           function unZorroIntersection(intersection, graph) {
-               var vertex = graph.entity(intersection.nodeId);
-               var way1 = graph.entity(intersection.movedId);
-               var way2 = graph.entity(intersection.unmovedId);
-               var isEP1 = intersection.movedIsEP;
-               var isEP2 = intersection.unmovedIsEP;
-
-               // don't move the vertex if it is the endpoint of both ways.
-               if (isEP1 && isEP2) { return graph; }
-
-               var nodes1 = graph.childNodes(way1).filter(function(n) { return n !== vertex; });
-               var nodes2 = graph.childNodes(way2).filter(function(n) { return n !== vertex; });
-
-               if (way1.isClosed() && way1.first() === vertex.id) { nodes1.push(nodes1[0]); }
-               if (way2.isClosed() && way2.first() === vertex.id) { nodes2.push(nodes2[0]); }
-
-               var edge1 = !isEP1 && geoChooseEdge(nodes1, projection(vertex.loc), projection);
-               var edge2 = !isEP2 && geoChooseEdge(nodes2, projection(vertex.loc), projection);
-               var loc;
-
-               // snap vertex to nearest edge (or some point between them)..
-               if (!isEP1 && !isEP2) {
-                   var epsilon = 1e-6, maxIter = 10;
-                   for (var i = 0; i < maxIter; i++) {
-                       loc = geoVecInterp(edge1.loc, edge2.loc, 0.5);
-                       edge1 = geoChooseEdge(nodes1, projection(loc), projection);
-                       edge2 = geoChooseEdge(nodes2, projection(loc), projection);
-                       if (Math.abs(edge1.distance - edge2.distance) < epsilon) { break; }
-                   }
-               } else if (!isEP1) {
-                   loc = edge1.loc;
-               } else {
-                   loc = edge2.loc;
-               }
+       function create$3(node, id, self) {
+         var schedules = node.__transition,
+             tween; // Initialize the self timer when the transition is created.
+         // Note the actual delay is not known until the first callback!

 
 

-               graph = graph.replace(vertex.move(loc));
+         schedules[id] = self;
+         self.timer = timer(schedule, 0, self.time);

 
 

-               // if zorro happened, reorder nodes..
-               if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
-                   way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
-                   graph = graph.replace(way1);
-               }
-               if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
-                   way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
-                   graph = graph.replace(way2);
-               }
+         function schedule(elapsed) {
+           self.state = SCHEDULED;
+           self.timer.restart(start, self.delay, self.time); // If the elapsed delay is less than our first sleep, start immediately.

 
 

-               return graph;
-           }
+           if (self.delay <= elapsed) start(elapsed - self.delay);
+         }

 
 

+         function start(elapsed) {
+           var i, j, n, o; // If the state is not SCHEDULED, then we previously errored on start.

 
 

-           function cleanupIntersections(graph) {
-               for (var i = 0; i < cache.intersections.length; i++) {
-                   var obj = cache.intersections[i];
-                   graph = replaceMovedVertex(obj.nodeId, obj.movedId, graph, _delta);
-                   graph = replaceMovedVertex(obj.nodeId, obj.unmovedId, graph, null);
-                   graph = unZorroIntersection(obj, graph);
-                   graph = removeDuplicateVertices(obj.movedId, graph);
-                   graph = removeDuplicateVertices(obj.unmovedId, graph);
-               }
+           if (self.state !== SCHEDULED) return stop();

 
 

-               return graph;
-           }
+           for (i in schedules) {
+             o = schedules[i];
+             if (o.name !== self.name) continue; // While this element already has a starting transition during this frame,
+             // defer starting an interrupting transition until that transition has a
+             // chance to tick (and possibly end); see d3/d3-transition#54!

 
 

+             if (o.state === STARTED) return d3_timeout(start); // Interrupt the active transition, if any.

 
 

-           // check if moving way endpoint can cross an unmoved way, if so limit delta..
-           function limitDelta(graph) {
-               function moveNode(loc) {
-                   return geoVecAdd(projection(loc), _delta);
+             if (o.state === RUNNING) {
+               o.state = ENDED;
+               o.timer.stop();
+               o.on.call("interrupt", node, node.__data__, o.index, o.group);
+               delete schedules[i];
+             } // Cancel any pre-empted transitions.
+             else if (+i < id) {
+                 o.state = ENDED;
+                 o.timer.stop();
+                 o.on.call("cancel", node, node.__data__, o.index, o.group);
+                 delete schedules[i];

                }
                }

+           } // Defer the first tick to end of the current frame; see d3/d3#1576.
+           // Note the transition may be canceled after start and before the first tick!
+           // Note this must be scheduled before the start event; see d3/d3-transition#16!
+           // Assuming this is successful, subsequent callbacks go straight to tick.

 
 

-               for (var i = 0; i < cache.intersections.length; i++) {
-                   var obj = cache.intersections[i];
-
-                   // Don't limit movement if this is vertex joins 2 endpoints..
-                   if (obj.movedIsEP && obj.unmovedIsEP) { continue; }
-                   // Don't limit movement if this vertex is not an endpoint anyway..
-                   if (!obj.movedIsEP) { continue; }

 
 

-                   var node = graph.entity(obj.nodeId);
-                   var start = projection(node.loc);
-                   var end = geoVecAdd(start, _delta);
-                   var movedNodes = graph.childNodes(graph.entity(obj.movedId));
-                   var movedPath = movedNodes.map(function(n) { return moveNode(n.loc); });
-                   var unmovedNodes = graph.childNodes(graph.entity(obj.unmovedId));
-                   var unmovedPath = unmovedNodes.map(function(n) { return projection(n.loc); });
-                   var hits = geoPathIntersections(movedPath, unmovedPath);
+           d3_timeout(function () {
+             if (self.state === STARTED) {
+               self.state = RUNNING;
+               self.timer.restart(tick, self.delay, self.time);
+               tick(elapsed);
+             }
+           }); // Dispatch the start event.
+           // Note this must be done before the tween are initialized.

 
 

-                   for (var j = 0; i < hits.length; i++) {
-                       if (geoVecEqual(hits[j], end)) { continue; }
-                       var edge = geoChooseEdge(unmovedNodes, end, projection);
-                       _delta = geoVecSubtract(projection(edge.loc), start);
-                   }
-               }
-           }
+           self.state = STARTING;
+           self.on.call("start", node, node.__data__, self.index, self.group);
+           if (self.state !== STARTING) return; // interrupted

 
 

+           self.state = STARTED; // Initialize the tween, deleting null tween.

 
 

-           var action = function(graph) {
-               if (_delta[0] === 0 && _delta[1] === 0) { return graph; }
+           tween = new Array(n = self.tween.length);

 
 

-               setupCache(graph);
+           for (i = 0, j = -1; i < n; ++i) {
+             if (o = self.tween[i].value.call(node, node.__data__, self.index, self.group)) {
+               tween[++j] = o;
+             }
+           }

 
 

-               if (cache.intersections.length) {
-                   limitDelta(graph);
-               }
+           tween.length = j + 1;
+         }

 
 

-               for (var i = 0; i < cache.nodes.length; i++) {
-                   var node = graph.entity(cache.nodes[i]);
-                   var start = projection(node.loc);
-                   var end = geoVecAdd(start, _delta);
-                   graph = graph.replace(node.move(projection.invert(end)));
-               }
+         function tick(elapsed) {
+           var t = elapsed < self.duration ? self.ease.call(null, elapsed / self.duration) : (self.timer.restart(stop), self.state = ENDING, 1),
+               i = -1,
+               n = tween.length;

 
 

-               if (cache.intersections.length) {
-                   graph = cleanupIntersections(graph);
-               }
+           while (++i < n) {
+             tween[i].call(node, t);
+           } // Dispatch the end event.

 
 

-               return graph;
-           };

 
 

+           if (self.state === ENDING) {
+             self.on.call("end", node, node.__data__, self.index, self.group);
+             stop();
+           }
+         }

 
 

-           action.delta = function() {
-               return _delta;
-           };
+         function stop() {
+           self.state = ENDED;
+           self.timer.stop();
+           delete schedules[id];

 
 

+           for (var i in schedules) {
+             return;
+           } // eslint-disable-line no-unused-vars

 
 

-           return action;
-       }

 
 

-       function actionMoveMember(relationId, fromIndex, toIndex) {
-           return function(graph) {
-               return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
-           };
+           delete node.__transition;
+         }

        }
 
        }
 

-       function actionMoveNode(nodeID, toLoc) {
-
-           var action = function(graph, t) {
-               if (t === null || !isFinite(t)) { t = 1; }
-               t = Math.min(Math.max(+t, 0), 1);
+       function interrupt (node, name) {
+         var schedules = node.__transition,
+             schedule,
+             active,
+             empty = true,
+             i;
+         if (!schedules) return;
+         name = name == null ? null : name + "";

 
 

-               var node = graph.entity(nodeID);
-               return graph.replace(
-                   node.move(geoVecInterp(node.loc, toLoc, t))
-               );
-           };
+         for (i in schedules) {
+           if ((schedule = schedules[i]).name !== name) {
+             empty = false;
+             continue;
+           }

 
 

-           action.transitionable = true;
+           active = schedule.state > STARTING && schedule.state < ENDING;
+           schedule.state = ENDED;
+           schedule.timer.stop();
+           schedule.on.call(active ? "interrupt" : "cancel", node, node.__data__, schedule.index, schedule.group);
+           delete schedules[i];
+         }

 
 

-           return action;
+         if (empty) delete node.__transition;

        }
 
        }
 

-       function actionNoop() {
-           return function(graph) {
-               return graph;
-           };
+       function selection_interrupt (name) {
+         return this.each(function () {
+           interrupt(this, name);
+         });

        }
 
        }
 

-       function actionOrthogonalize(wayID, projection, vertexID, degThresh, ep) {
-           var epsilon = ep || 1e-4;
-           var threshold = degThresh || 13;  // degrees within right or straight to alter
+       function tweenRemove(id, name) {
+         var tween0, tween1;
+         return function () {
+           var schedule = set(this, id),
+               tween = schedule.tween; // If this node shared tween with the previous node,
+           // just assign the updated shared tween and we’re done!
+           // Otherwise, copy-on-write.
+
+           if (tween !== tween0) {
+             tween1 = tween0 = tween;

 
 

-           // We test normalized dot products so we can compare as cos(angle)
-           var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-           var upperThreshold = Math.cos(threshold * Math.PI / 180);
+             for (var i = 0, n = tween1.length; i < n; ++i) {
+               if (tween1[i].name === name) {
+                 tween1 = tween1.slice();
+                 tween1.splice(i, 1);
+                 break;
+               }
+             }
+           }

 
 

+           schedule.tween = tween1;
+         };
+       }

 
 

-           var action = function(graph, t) {
-               if (t === null || !isFinite(t)) { t = 1; }
-               t = Math.min(Math.max(+t, 0), 1);
+       function tweenFunction(id, name, value) {
+         var tween0, tween1;
+         if (typeof value !== "function") throw new Error();
+         return function () {
+           var schedule = set(this, id),
+               tween = schedule.tween; // If this node shared tween with the previous node,
+           // just assign the updated shared tween and we’re done!
+           // Otherwise, copy-on-write.

 
 

-               var way = graph.entity(wayID);
-               way = way.removeNode('');   // sanity check - remove any consecutive duplicates
+           if (tween !== tween0) {
+             tween1 = (tween0 = tween).slice();

 
 

-               if (way.tags.nonsquare) {
-                   var tags = Object.assign({}, way.tags);
-                   // since we're squaring, remove indication that this is physically unsquare
-                   delete tags.nonsquare;
-                   way = way.update({tags: tags});
+             for (var t = {
+               name: name,
+               value: value
+             }, i = 0, n = tween1.length; i < n; ++i) {
+               if (tween1[i].name === name) {
+                 tween1[i] = t;
+                 break;

                }
                }

+             }
+
+             if (i === n) tween1.push(t);
+           }

 
 

-               graph = graph.replace(way);
+           schedule.tween = tween1;
+         };
+       }

 
 

-               var isClosed = way.isClosed();
-               var nodes = graph.childNodes(way).slice();  // shallow copy
-               if (isClosed) { nodes.pop(); }
+       function transition_tween (name, value) {
+         var id = this._id;
+         name += "";

 
 

-               if (vertexID !== undefined) {
-                   nodes = nodeSubset(nodes, vertexID, isClosed);
-                   if (nodes.length !== 3) { return graph; }
-               }
+         if (arguments.length < 2) {
+           var tween = get$1(this.node(), id).tween;

 
 

-               // note: all geometry functions here use the unclosed node/point/coord list
+           for (var i = 0, n = tween.length, t; i < n; ++i) {
+             if ((t = tween[i]).name === name) {
+               return t.value;
+             }
+           }

 
 

-               var nodeCount = {};
-               var points = [];
-               var corner = { i: 0, dotp: 1 };
-               var node, point, loc, score, motions, i, j;
+           return null;
+         }

 
 

-               for (i = 0; i < nodes.length; i++) {
-                   node = nodes[i];
-                   nodeCount[node.id] = (nodeCount[node.id] || 0) + 1;
-                   points.push({ id: node.id, coord: projection(node.loc) });
-               }
+         return this.each((value == null ? tweenRemove : tweenFunction)(id, name, value));
+       }
+       function tweenValue(transition, name, value) {
+         var id = transition._id;
+         transition.each(function () {
+           var schedule = set(this, id);
+           (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
+         });
+         return function (node) {
+           return get$1(node, id).value[name];
+         };
+       }

 
 

+       function interpolate (a, b) {
+         var c;
+         return (typeof b === "number" ? d3_interpolateNumber : b instanceof color ? d3_interpolateRgb : (c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString)(a, b);
+       }

 
 

-               if (points.length === 3) {   // move only one vertex for right triangle
-                   for (i = 0; i < 1000; i++) {
-                       motions = points.map(calcMotion);
+       function attrRemove(name) {
+         return function () {
+           this.removeAttribute(name);
+         };
+       }

 
 

-                       points[corner.i].coord = geoVecAdd(points[corner.i].coord, motions[corner.i]);
-                       score = corner.dotp;
-                       if (score < epsilon) {
-                           break;
-                       }
-                   }
+       function attrRemoveNS(fullname) {
+         return function () {
+           this.removeAttributeNS(fullname.space, fullname.local);
+         };
+       }

 
 

-                   node = graph.entity(nodes[corner.i].id);
-                   loc = projection.invert(points[corner.i].coord);
-                   graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+       function attrConstant(name, interpolate, value1) {
+         var string00,
+             string1 = value1 + "",
+             interpolate0;
+         return function () {
+           var string0 = this.getAttribute(name);
+           return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
+         };
+       }

 
 

-               } else {
-                   var straights = [];
-                   var simplified = [];
-
-                   // Remove points from nearly straight sections..
-                   // This produces a simplified shape to orthogonalize
-                   for (i = 0; i < points.length; i++) {
-                       point = points[i];
-                       var dotp = 0;
-                       if (isClosed || (i > 0 && i < points.length - 1)) {
-                           var a = points[(i - 1 + points.length) % points.length];
-                           var b = points[(i + 1) % points.length];
-                           dotp = Math.abs(geoOrthoNormalizedDotProduct(a.coord, b.coord, point.coord));
-                       }
+       function attrConstantNS(fullname, interpolate, value1) {
+         var string00,
+             string1 = value1 + "",
+             interpolate0;
+         return function () {
+           var string0 = this.getAttributeNS(fullname.space, fullname.local);
+           return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
+         };
+       }

 
 

-                       if (dotp > upperThreshold) {
-                           straights.push(point);
-                       } else {
-                           simplified.push(point);
-                       }
-                   }
+       function attrFunction(name, interpolate, value) {
+         var string00, string10, interpolate0;
+         return function () {
+           var string0,
+               value1 = value(this),
+               string1;
+           if (value1 == null) return void this.removeAttribute(name);
+           string0 = this.getAttribute(name);
+           string1 = value1 + "";
+           return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+         };
+       }

 
 

-                   // Orthogonalize the simplified shape
-                   var bestPoints = clonePoints(simplified);
-                   var originalPoints = clonePoints(simplified);
+       function attrFunctionNS(fullname, interpolate, value) {
+         var string00, string10, interpolate0;
+         return function () {
+           var string0,
+               value1 = value(this),
+               string1;
+           if (value1 == null) return void this.removeAttributeNS(fullname.space, fullname.local);
+           string0 = this.getAttributeNS(fullname.space, fullname.local);
+           string1 = value1 + "";
+           return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+         };
+       }

 
 

-                   score = Infinity;
-                   for (i = 0; i < 1000; i++) {
-                       motions = simplified.map(calcMotion);
+       function transition_attr (name, value) {
+         var fullname = namespace(name),
+             i = fullname === "transform" ? interpolateTransformSvg : interpolate;
+         return this.attrTween(name, typeof value === "function" ? (fullname.local ? attrFunctionNS : attrFunction)(fullname, i, tweenValue(this, "attr." + name, value)) : value == null ? (fullname.local ? attrRemoveNS : attrRemove)(fullname) : (fullname.local ? attrConstantNS : attrConstant)(fullname, i, value));
+       }

 
 

-                       for (j = 0; j < motions.length; j++) {
-                           simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
-                       }
-                       var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
-                       if (newScore < score) {
-                           bestPoints = clonePoints(simplified);
-                           score = newScore;
-                       }
-                       if (score < epsilon) {
-                           break;
-                       }
-                   }
+       function attrInterpolate(name, i) {
+         return function (t) {
+           this.setAttribute(name, i.call(this, t));
+         };
+       }

 
 

-                   var bestCoords = bestPoints.map(function(p) { return p.coord; });
-                   if (isClosed) { bestCoords.push(bestCoords[0]); }
+       function attrInterpolateNS(fullname, i) {
+         return function (t) {
+           this.setAttributeNS(fullname.space, fullname.local, i.call(this, t));
+         };
+       }

 
 

-                   // move the nodes that should move
-                   for (i = 0; i < bestPoints.length; i++) {
-                       point = bestPoints[i];
-                       if (!geoVecEqual(originalPoints[i].coord, point.coord)) {
-                           node = graph.entity(point.id);
-                           loc = projection.invert(point.coord);
-                           graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
-                       }
-                   }
+       function attrTweenNS(fullname, value) {
+         var t0, i0;

 
 

-                   // move the nodes along straight segments
-                   for (i = 0; i < straights.length; i++) {
-                       point = straights[i];
-                       if (nodeCount[point.id] > 1) { continue; }   // skip self-intersections
+         function tween() {
+           var i = value.apply(this, arguments);
+           if (i !== i0) t0 = (i0 = i) && attrInterpolateNS(fullname, i);
+           return t0;
+         }

 
 

-                       node = graph.entity(point.id);
+         tween._value = value;
+         return tween;
+       }

 
 

-                       if (t === 1 &&
-                           graph.parentWays(node).length === 1 &&
-                           graph.parentRelations(node).length === 0 &&
-                           !node.hasInterestingTags()
-                       ) {
-                           // remove uninteresting points..
-                           graph = actionDeleteNode(node.id)(graph);
+       function attrTween(name, value) {
+         var t0, i0;

 
 

-                       } else {
-                           // move interesting points to the nearest edge..
-                           var choice = geoVecProject(point.coord, bestCoords);
-                           if (choice) {
-                               loc = projection.invert(choice.target);
-                               graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
-                           }
-                       }
-                   }
-               }
+         function tween() {
+           var i = value.apply(this, arguments);
+           if (i !== i0) t0 = (i0 = i) && attrInterpolate(name, i);
+           return t0;
+         }

 
 

-               return graph;
+         tween._value = value;
+         return tween;
+       }

 
 

+       function transition_attrTween (name, value) {
+         var key = "attr." + name;
+         if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+         if (value == null) return this.tween(key, null);
+         if (typeof value !== "function") throw new Error();
+         var fullname = namespace(name);
+         return this.tween(key, (fullname.local ? attrTweenNS : attrTween)(fullname, value));
+       }

 
 

-               function clonePoints(array) {
-                   return array.map(function(p) {
-                       return { id: p.id, coord: [p.coord[0], p.coord[1]] };
-                   });
-               }
+       function delayFunction(id, value) {
+         return function () {
+           init(this, id).delay = +value.apply(this, arguments);
+         };
+       }

 
 

+       function delayConstant(id, value) {
+         return value = +value, function () {
+           init(this, id).delay = value;
+         };
+       }

 
 

-               function calcMotion(point, i, array) {
-                   // don't try to move the endpoints of a non-closed way.
-                   if (!isClosed && (i === 0 || i === array.length - 1)) { return [0, 0]; }
-                   // don't try to move a node that appears more than once (self intersection)
-                   if (nodeCount[array[i].id] > 1) { return [0, 0]; }
+       function transition_delay (value) {
+         var id = this._id;
+         return arguments.length ? this.each((typeof value === "function" ? delayFunction : delayConstant)(id, value)) : get$1(this.node(), id).delay;
+       }

 
 

-                   var a = array[(i - 1 + array.length) % array.length].coord;
-                   var origin = point.coord;
-                   var b = array[(i + 1) % array.length].coord;
-                   var p = geoVecSubtract(a, origin);
-                   var q = geoVecSubtract(b, origin);
+       function durationFunction(id, value) {
+         return function () {
+           set(this, id).duration = +value.apply(this, arguments);
+         };
+       }

 
 

-                   var scale = 2 * Math.min(geoVecLength(p), geoVecLength(q));
-                   p = geoVecNormalize(p);
-                   q = geoVecNormalize(q);
+       function durationConstant(id, value) {
+         return value = +value, function () {
+           set(this, id).duration = value;
+         };
+       }

 
 

-                   var dotp = (p[0] * q[0] + p[1] * q[1]);
-                   var val = Math.abs(dotp);
+       function transition_duration (value) {
+         var id = this._id;
+         return arguments.length ? this.each((typeof value === "function" ? durationFunction : durationConstant)(id, value)) : get$1(this.node(), id).duration;
+       }

 
 

-                   if (val < lowerThreshold) {  // nearly orthogonal
-                       corner.i = i;
-                       corner.dotp = val;
-                       var vec = geoVecNormalize(geoVecAdd(p, q));
-                       return geoVecScale(vec, 0.1 * dotp * scale);
-                   }
+       function easeConstant(id, value) {
+         if (typeof value !== "function") throw new Error();
+         return function () {
+           set(this, id).ease = value;
+         };
+       }

 
 

-                   return [0, 0];   // do nothing
-               }
-           };
+       function transition_ease (value) {
+         var id = this._id;
+         return arguments.length ? this.each(easeConstant(id, value)) : get$1(this.node(), id).ease;
+       }

 
 

+       function easeVarying(id, value) {
+         return function () {
+           var v = value.apply(this, arguments);
+           if (typeof v !== "function") throw new Error();
+           set(this, id).ease = v;
+         };
+       }

 
 

-           // if we are only orthogonalizing one vertex,
-           // get that vertex and the previous and next
-           function nodeSubset(nodes, vertexID, isClosed) {
-               var first = isClosed ? 0 : 1;
-               var last = isClosed ? nodes.length : nodes.length - 1;
+       function transition_easeVarying (value) {
+         if (typeof value !== "function") throw new Error();
+         return this.each(easeVarying(this._id, value));
+       }

 
 

-               for (var i = first; i < last; i++) {
-                   if (nodes[i].id === vertexID) {
-                       return [
-                           nodes[(i - 1 + nodes.length) % nodes.length],
-                           nodes[i],
-                           nodes[(i + 1) % nodes.length]
-                       ];
-                   }
-               }
+       function transition_filter (match) {
+         if (typeof match !== "function") match = matcher(match);

 
 

-               return [];
+         for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+           for (var group = groups[j], n = group.length, subgroup = subgroups[j] = [], node, i = 0; i < n; ++i) {
+             if ((node = group[i]) && match.call(node, node.__data__, i, group)) {
+               subgroup.push(node);
+             }

            }
            }

+         }

 
 

+         return new Transition(subgroups, this._parents, this._name, this._id);
+       }

 
 

-           action.disabled = function(graph) {
-               var way = graph.entity(wayID);
-               way = way.removeNode('');  // sanity check - remove any consecutive duplicates
-               graph = graph.replace(way);
+       function transition_merge (transition) {
+         if (transition._id !== this._id) throw new Error();

 
 

-               var isClosed = way.isClosed();
-               var nodes = graph.childNodes(way).slice();  // shallow copy
-               if (isClosed) { nodes.pop(); }
+         for (var groups0 = this._groups, groups1 = transition._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
+           for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
+             if (node = group0[i] || group1[i]) {
+               merge[i] = node;
+             }
+           }
+         }

 
 

-               var allowStraightAngles = false;
-               if (vertexID !== undefined) {
-                   allowStraightAngles = true;
-                   nodes = nodeSubset(nodes, vertexID, isClosed);
-                   if (nodes.length !== 3) { return 'end_vertex'; }
-               }
+         for (; j < m0; ++j) {
+           merges[j] = groups0[j];
+         }

 
 

-               var coords = nodes.map(function(n) { return projection(n.loc); });
-               var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
+         return new Transition(merges, this._parents, this._name, this._id);
+       }

 
 

-               if (score === null) {
-                   return 'not_squarish';
-               } else if (score === 0) {
-                   return 'square_enough';
-               } else {
-                   return false;
-               }
-           };
+       function start(name) {
+         return (name + "").trim().split(/^|\s+/).every(function (t) {
+           var i = t.indexOf(".");
+           if (i >= 0) t = t.slice(0, i);
+           return !t || t === "start";
+         });
+       }

 
 

+       function onFunction(id, name, listener) {
+         var on0,
+             on1,
+             sit = start(name) ? init : set;
+         return function () {
+           var schedule = sit(this, id),
+               on = schedule.on; // If this node shared a dispatch with the previous node,
+           // just assign the updated shared dispatch and we’re done!
+           // Otherwise, copy-on-write.

 
 

-           action.transitionable = true;
+           if (on !== on0) (on1 = (on0 = on).copy()).on(name, listener);
+           schedule.on = on1;
+         };
+       }

 
 

-           return action;
+       function transition_on (name, listener) {
+         var id = this._id;
+         return arguments.length < 2 ? get$1(this.node(), id).on.on(name) : this.each(onFunction(id, name, listener));

        }
 
        }
 

-       // `actionRestrictTurn` creates a turn restriction relation.
-       //
-       // `turn` must be an `osmTurn` object
-       // see osm/intersection.js, pathToTurn()
-       //
-       // This specifies a restriction of type `restriction` when traveling from
-       // `turn.from.way` toward `turn.to.way` via `turn.via.node` OR `turn.via.ways`.
-       // (The action does not check that these entities form a valid intersection.)
-       //
-       // From, to, and via ways should be split before calling this action.
-       // (old versions of the code would split the ways here, but we no longer do it)
-       //
-       // For testing convenience, accepts a restrictionID to assign to the new
-       // relation. Normally, this will be undefined and the relation will
-       // automatically be assigned a new ID.
-       //
-       function actionRestrictTurn(turn, restrictionType, restrictionID) {
+       function removeFunction(id) {
+         return function () {
+           var parent = this.parentNode;

 
 

-           return function(graph) {
-               var fromWay = graph.entity(turn.from.way);
-               var toWay = graph.entity(turn.to.way);
-               var viaNode = turn.via.node && graph.entity(turn.via.node);
-               var viaWays = turn.via.ways && turn.via.ways.map(function(id) { return graph.entity(id); });
-               var members = [];
+           for (var i in this.__transition) {
+             if (+i !== id) return;
+           }

 
 

-               members.push({ id: fromWay.id, type: 'way',  role: 'from' });
+           if (parent) parent.removeChild(this);
+         };
+       }

 
 

-               if (viaNode) {
-                   members.push({ id: viaNode.id,  type: 'node', role: 'via' });
-               } else if (viaWays) {
-                   viaWays.forEach(function(viaWay) {
-                       members.push({ id: viaWay.id,  type: 'way', role: 'via' });
-                   });
-               }
+       function transition_remove () {
+         return this.on("end.remove", removeFunction(this._id));
+       }

 
 

-               members.push({ id: toWay.id, type: 'way',  role: 'to' });
+       function transition_select (select) {
+         var name = this._name,
+             id = this._id;
+         if (typeof select !== "function") select = selector(select);

 
 

-               return graph.replace(osmRelation({
-                   id: restrictionID,
-                   tags: {
-                       type: 'restriction',
-                       restriction: restrictionType
-                   },
-                   members: members
-               }));
-           };
-       }
+         for (var groups = this._groups, m = groups.length, subgroups = new Array(m), j = 0; j < m; ++j) {
+           for (var group = groups[j], n = group.length, subgroup = subgroups[j] = new Array(n), node, subnode, i = 0; i < n; ++i) {
+             if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
+               if ("__data__" in node) subnode.__data__ = node.__data__;
+               subgroup[i] = subnode;
+               schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
+             }
+           }
+         }

 
 

-       function actionRevert(id) {
-           var action = function(graph) {
-               var entity = graph.hasEntity(id),
-                   base = graph.base().entities[id];
-
-               if (entity && !base) {    // entity will be removed..
-                   if (entity.type === 'node') {
-                       graph.parentWays(entity)
-                           .forEach(function(parent) {
-                               parent = parent.removeNode(id);
-                               graph = graph.replace(parent);
-
-                               if (parent.isDegenerate()) {
-                                   graph = actionDeleteWay(parent.id)(graph);
-                               }
-                           });
-                   }
+         return new Transition(subgroups, this._parents, name, id);
+       }

 
 

-                   graph.parentRelations(entity)
-                       .forEach(function(parent) {
-                           parent = parent.removeMembersWithID(id);
-                           graph = graph.replace(parent);
+       function transition_selectAll (select) {
+         var name = this._name,
+             id = this._id;
+         if (typeof select !== "function") select = selectorAll(select);

 
 

-                           if (parent.isDegenerate()) {
-                               graph = actionDeleteRelation(parent.id)(graph);
-                           }
-                       });
+         for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
+           for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+             if (node = group[i]) {
+               for (var children = select.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
+                 if (child = children[k]) {
+                   schedule(child, name, id, k, children, inherit);
+                 }

                }
 
                }
 

-               return graph.revert(id);
-           };
+               subgroups.push(children);
+               parents.push(node);
+             }
+           }
+         }

 
 

-           return action;
+         return new Transition(subgroups, parents, name, id);

        }
 
        }
 

-       function actionRotate(rotateIds, pivot, angle, projection) {
-
-           var action = function(graph) {
-               return graph.update(function(graph) {
-                   utilGetAllNodes(rotateIds, graph).forEach(function(node) {
-                       var point = geoRotate([projection(node.loc)], angle, pivot)[0];
-                       graph = graph.replace(node.move(projection.invert(point)));
-                   });
-               });
-           };
-
-           return action;
+       var Selection = selection.prototype.constructor;
+       function transition_selection () {
+         return new Selection(this._groups, this._parents);

        }
 
        }
 

-       /* Align nodes along their common axis */
-       function actionStraightenNodes(nodeIDs, projection) {
-
-           function positionAlongWay(a, o, b) {
-               return geoVecDot(a, b, o) / geoVecDot(b, b, o);
-           }
-
-           // returns the endpoints of the long axis of symmetry of the `points` bounding rect 
-           function getEndpoints(points) {
-               var ssr = geoGetSmallestSurroundingRectangle(points);
+       function styleNull(name, interpolate) {
+         var string00, string10, interpolate0;
+         return function () {
+           var string0 = styleValue(this, name),
+               string1 = (this.style.removeProperty(name), styleValue(this, name));
+           return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : interpolate0 = interpolate(string00 = string0, string10 = string1);
+         };
+       }

 
 

-               // Choose line pq = axis of symmetry.
-               // The shape's surrounding rectangle has 2 axes of symmetry.
-               // Snap points to the long axis
-               var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2 ];
-               var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2 ];
-               var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2 ];
-               var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2 ];
+       function styleRemove(name) {
+         return function () {
+           this.style.removeProperty(name);
+         };
+       }

 
 

-               var isLong = (geoVecLength(p1, q1) > geoVecLength(p2, q2));
-               if (isLong) {
-                   return [p1, q1];
-               }
-               return [p2, q2];
-           }
+       function styleConstant(name, interpolate, value1) {
+         var string00,
+             string1 = value1 + "",
+             interpolate0;
+         return function () {
+           var string0 = styleValue(this, name);
+           return string0 === string1 ? null : string0 === string00 ? interpolate0 : interpolate0 = interpolate(string00 = string0, value1);
+         };
+       }

 
 

+       function styleFunction(name, interpolate, value) {
+         var string00, string10, interpolate0;
+         return function () {
+           var string0 = styleValue(this, name),
+               value1 = value(this),
+               string1 = value1 + "";
+           if (value1 == null) string1 = value1 = (this.style.removeProperty(name), styleValue(this, name));
+           return string0 === string1 ? null : string0 === string00 && string1 === string10 ? interpolate0 : (string10 = string1, interpolate0 = interpolate(string00 = string0, value1));
+         };
+       }

 
 

-           var action = function(graph, t) {
-               if (t === null || !isFinite(t)) { t = 1; }
-               t = Math.min(Math.max(+t, 0), 1);
+       function styleMaybeRemove(id, name) {
+         var on0,
+             on1,
+             listener0,
+             key = "style." + name,
+             event = "end." + key,
+             remove;
+         return function () {
+           var schedule = set(this, id),
+               on = schedule.on,
+               listener = schedule.value[key] == null ? remove || (remove = styleRemove(name)) : undefined; // If this node shared a dispatch with the previous node,
+           // just assign the updated shared dispatch and we’re done!
+           // Otherwise, copy-on-write.

 
 

-               var nodes = nodeIDs.map(function(id) { return graph.entity(id); });
-               var points = nodes.map(function(n) { return projection(n.loc); });
-               var endpoints = getEndpoints(points);
-               var startPoint = endpoints[0];
-               var endPoint = endpoints[1];
+           if (on !== on0 || listener0 !== listener) (on1 = (on0 = on).copy()).on(event, listener0 = listener);
+           schedule.on = on1;
+         };
+       }

 
 

-               // Move points onto the line connecting the endpoints
-               for (var i = 0; i < points.length; i++) {
-                   var node = nodes[i];
-                   var point = points[i];
-                   var u = positionAlongWay(point, startPoint, endPoint);
-                   var point2 = geoVecInterp(startPoint, endPoint, u);
-                   var loc2 = projection.invert(point2);
-                   graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
-               }
+       function transition_style (name, value, priority) {
+         var i = (name += "") === "transform" ? interpolateTransformCss : interpolate;
+         return value == null ? this.styleTween(name, styleNull(name, i)).on("end.style." + name, styleRemove(name)) : typeof value === "function" ? this.styleTween(name, styleFunction(name, i, tweenValue(this, "style." + name, value))).each(styleMaybeRemove(this._id, name)) : this.styleTween(name, styleConstant(name, i, value), priority).on("end.style." + name, null);
+       }

 
 

-               return graph;
-           };
+       function styleInterpolate(name, i, priority) {
+         return function (t) {
+           this.style.setProperty(name, i.call(this, t), priority);
+         };
+       }

 
 

+       function styleTween(name, value, priority) {
+         var t, i0;

 
 

-           action.disabled = function(graph) {
+         function tween() {
+           var i = value.apply(this, arguments);
+           if (i !== i0) t = (i0 = i) && styleInterpolate(name, i, priority);
+           return t;
+         }

 
 

-               var nodes = nodeIDs.map(function(id) { return graph.entity(id); });
-               var points = nodes.map(function(n) { return projection(n.loc); });
-               var endpoints = getEndpoints(points);
-               var startPoint = endpoints[0];
-               var endPoint = endpoints[1];
+         tween._value = value;
+         return tween;
+       }

 
 

-               var maxDistance = 0;
+       function transition_styleTween (name, value, priority) {
+         var key = "style." + (name += "");
+         if (arguments.length < 2) return (key = this.tween(key)) && key._value;
+         if (value == null) return this.tween(key, null);
+         if (typeof value !== "function") throw new Error();
+         return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
+       }

 
 

-               for (var i = 0; i < points.length; i++) {
-                   var point = points[i];
-                   var u = positionAlongWay(point, startPoint, endPoint);
-                   var p = geoVecInterp(startPoint, endPoint, u);
-                   var dist = geoVecLength(p, point);
+       function textConstant(value) {
+         return function () {
+           this.textContent = value;
+         };
+       }

 
 

-                   if (!isNaN(dist) && dist > maxDistance) {
-                       maxDistance = dist;
-                   }
-               }
+       function textFunction(value) {
+         return function () {
+           var value1 = value(this);
+           this.textContent = value1 == null ? "" : value1;
+         };
+       }

 
 

-               if (maxDistance < 0.0001) {
-                   return 'straight_enough';
-               }
-           };
+       function transition_text (value) {
+         return this.tween("text", typeof value === "function" ? textFunction(tweenValue(this, "text", value)) : textConstant(value == null ? "" : value + ""));
+       }

 
 

+       function textInterpolate(i) {
+         return function (t) {
+           this.textContent = i.call(this, t);
+         };
+       }

 
 

-           action.transitionable = true;
+       function textTween(value) {
+         var t0, i0;

 
 

+         function tween() {
+           var i = value.apply(this, arguments);
+           if (i !== i0) t0 = (i0 = i) && textInterpolate(i);
+           return t0;
+         }

 
 

-           return action;
+         tween._value = value;
+         return tween;

        }
 
        }
 

-       /*
-        * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
-        */
-       function actionStraightenWay(selectedIDs, projection) {
-
-           function positionAlongWay(a, o, b) {
-               return geoVecDot(a, b, o) / geoVecDot(b, b, o);
-           }
-
-           // Return all selected ways as a continuous, ordered array of nodes
-           function allNodes(graph) {
-               var nodes = [];
-               var startNodes = [];
-               var endNodes = [];
-               var remainingWays = [];
-               var selectedWays = selectedIDs.filter(function(w) {
-                   return graph.entity(w).type === 'way';
-               });
-               var selectedNodes = selectedIDs.filter(function(n) {
-                   return graph.entity(n).type === 'node';
-               });
+       function transition_textTween (value) {
+         var key = "text";
+         if (arguments.length < 1) return (key = this.tween(key)) && key._value;
+         if (value == null) return this.tween(key, null);
+         if (typeof value !== "function") throw new Error();
+         return this.tween(key, textTween(value));
+       }

 
 

-               for (var i = 0; i < selectedWays.length; i++) {
-                   var way = graph.entity(selectedWays[i]);
-                   nodes = way.nodes.slice(0);
-                   remainingWays.push(nodes);
-                   startNodes.push(nodes[0]);
-                   endNodes.push(nodes[nodes.length-1]);
-               }
+       function transition_transition () {
+         var name = this._name,
+             id0 = this._id,
+             id1 = newId();

 
 

-               // Remove duplicate end/startNodes (duplicate nodes cannot be at the line end,
-               //   and need to be removed so currNode difference calculation below works)
-               // i.e. ["n-1", "n-1", "n-2"] => ["n-2"]
-               startNodes = startNodes.filter(function(n) {
-                   return startNodes.indexOf(n) === startNodes.lastIndexOf(n);
-               });
-               endNodes = endNodes.filter(function(n) {
-                   return endNodes.indexOf(n) === endNodes.lastIndexOf(n);
+         for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+           for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+             if (node = group[i]) {
+               var inherit = get$1(node, id0);
+               schedule(node, name, id1, i, group, {
+                 time: inherit.time + inherit.delay + inherit.duration,
+                 delay: 0,
+                 duration: inherit.duration,
+                 ease: inherit.ease

                });
                });

+             }
+           }
+         }

 
 

-               // Choose the initial endpoint to start from
-               var currNode = utilArrayDifference(startNodes, endNodes)
-                   .concat(utilArrayDifference(endNodes, startNodes))[0];
-               var nextWay = [];
-               nodes = [];
-
-               // Create nested function outside of loop to avoid "function in loop" lint error
-               var getNextWay = function(currNode, remainingWays) {
-                   return remainingWays.filter(function(way) {
-                       return way[0] === currNode || way[way.length-1] === currNode;
-                   })[0];
-               };
+         return new Transition(groups, this._parents, name, id1);
+       }

 
 

-               // Add nodes to end of nodes array, until all ways are added
-               while (remainingWays.length) {
-                   nextWay = getNextWay(currNode, remainingWays);
-                   remainingWays = utilArrayDifference(remainingWays, [nextWay]);
+       function transition_end () {
+         var on0,
+             on1,
+             that = this,
+             id = that._id,
+             size = that.size();
+         return new Promise(function (resolve, reject) {
+           var cancel = {
+             value: reject
+           },
+               end = {
+             value: function value() {
+               if (--size === 0) resolve();
+             }
+           };
+           that.each(function () {
+             var schedule = set(this, id),
+                 on = schedule.on; // If this node shared a dispatch with the previous node,
+             // just assign the updated shared dispatch and we’re done!
+             // Otherwise, copy-on-write.

 
 

-                   if (nextWay[0] !== currNode) {
-                       nextWay.reverse();
-                   }
-                   nodes = nodes.concat(nextWay);
-                   currNode = nodes[nodes.length-1];
-               }
+             if (on !== on0) {
+               on1 = (on0 = on).copy();

 
 

-               // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
-               if (selectedNodes.length === 2) {
-                   var startNodeIdx = nodes.indexOf(selectedNodes[0]);
-                   var endNodeIdx = nodes.indexOf(selectedNodes[1]);
-                   var sortedStartEnd = [startNodeIdx, endNodeIdx];
+               on1._.cancel.push(cancel);

 
 

-                   sortedStartEnd.sort(function(a, b) { return a - b; });
-                   nodes = nodes.slice(sortedStartEnd[0], sortedStartEnd[1]+1);
-               }
+               on1._.interrupt.push(cancel);

 
 

-               return nodes.map(function(n) { return graph.entity(n); });
-           }
+               on1._.end.push(end);
+             }

 
 

-           function shouldKeepNode(node, graph) {
-               return graph.parentWays(node).length > 1 ||
-                   graph.parentRelations(node).length ||
-                   node.hasInterestingTags();
-           }
+             schedule.on = on1;
+           }); // The selection was empty, resolve end immediately

 
 

+           if (size === 0) resolve();
+         });
+       }

 
 

-           var action = function(graph, t) {
-               if (t === null || !isFinite(t)) { t = 1; }
-               t = Math.min(Math.max(+t, 0), 1);
+       var id = 0;
+       function Transition(groups, parents, name, id) {
+         this._groups = groups;
+         this._parents = parents;
+         this._name = name;
+         this._id = id;
+       }
+       function newId() {
+         return ++id;
+       }
+       var selection_prototype = selection.prototype;
+       Transition.prototype = _defineProperty({
+         constructor: Transition,
+         select: transition_select,
+         selectAll: transition_selectAll,
+         filter: transition_filter,
+         merge: transition_merge,
+         selection: transition_selection,
+         transition: transition_transition,
+         call: selection_prototype.call,
+         nodes: selection_prototype.nodes,
+         node: selection_prototype.node,
+         size: selection_prototype.size,
+         empty: selection_prototype.empty,
+         each: selection_prototype.each,
+         on: transition_on,
+         attr: transition_attr,
+         attrTween: transition_attrTween,
+         style: transition_style,
+         styleTween: transition_styleTween,
+         text: transition_text,
+         textTween: transition_textTween,
+         remove: transition_remove,
+         tween: transition_tween,
+         delay: transition_delay,
+         duration: transition_duration,
+         ease: transition_ease,
+         easeVarying: transition_easeVarying,
+         end: transition_end
+       }, Symbol.iterator, selection_prototype[Symbol.iterator]);

 
 

-               var nodes = allNodes(graph);
-               var points = nodes.map(function(n) { return projection(n.loc); });
-               var startPoint = points[0];
-               var endPoint = points[points.length-1];
-               var toDelete = [];
-               var i;
+       var linear$1 = function linear(t) {
+         return +t;
+       };

 
 

-               for (i = 1; i < points.length-1; i++) {
-                   var node = nodes[i];
-                   var point = points[i];
+       function cubicInOut(t) {
+         return ((t *= 2) <= 1 ? t * t * t : (t -= 2) * t * t + 2) / 2;
+       }

 
 

-                   if (t < 1 || shouldKeepNode(node, graph)) {
-                       var u = positionAlongWay(point, startPoint, endPoint);
-                       var p = geoVecInterp(startPoint, endPoint, u);
-                       var loc2 = projection.invert(p);
-                       graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
+       var defaultTiming = {
+         time: null,
+         // Set on use.
+         delay: 0,
+         duration: 250,
+         ease: cubicInOut
+       };

 
 

-                   } else {
-                       // safe to delete
-                       if (toDelete.indexOf(node) === -1) {
-                           toDelete.push(node);
-                       }
-                   }
-               }
+       function inherit(node, id) {
+         var timing;

 
 

-               for (i = 0; i < toDelete.length; i++) {
-                   graph = actionDeleteNode(toDelete[i].id)(graph);
-               }
+         while (!(timing = node.__transition) || !(timing = timing[id])) {
+           if (!(node = node.parentNode)) {
+             throw new Error("transition ".concat(id, " not found"));
+           }
+         }

 
 

-               return graph;
-           };
+         return timing;
+       }

 
 

+       function selection_transition (name) {
+         var id, timing;

 
 

-           action.disabled = function(graph) {
-               // check way isn't too bendy
-               var nodes = allNodes(graph);
-               var points = nodes.map(function(n) { return projection(n.loc); });
-               var startPoint = points[0];
-               var endPoint = points[points.length-1];
-               var threshold = 0.2 * geoVecLength(startPoint, endPoint);
-               var i;
+         if (name instanceof Transition) {
+           id = name._id, name = name._name;
+         } else {
+           id = newId(), (timing = defaultTiming).time = now$1(), name = name == null ? null : name + "";
+         }

 
 

-               if (threshold === 0) {
-                   return 'too_bendy';
-               }
+         for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
+           for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
+             if (node = group[i]) {
+               schedule(node, name, id, i, group, timing || inherit(node, id));
+             }
+           }
+         }

 
 

-               var maxDistance = 0;
+         return new Transition(groups, this._parents, name, id);
+       }

 
 

-               for (i = 1; i < points.length - 1; i++) {
-                   var point = points[i];
-                   var u = positionAlongWay(point, startPoint, endPoint);
-                   var p = geoVecInterp(startPoint, endPoint, u);
-                   var dist = geoVecLength(p, point);
+       selection.prototype.interrupt = selection_interrupt;
+       selection.prototype.transition = selection_transition;

 
 

-                   // to bendy if point is off by 20% of total start/end distance in projected space
-                   if (isNaN(dist) || dist > threshold) {
-                       return 'too_bendy';
-                   } else if (dist > maxDistance) {
-                       maxDistance = dist;
-                   }
-               }
+       var constant = (function (x) {
+         return function () {
+           return x;
+         };
+       });

 
 

-               var keepingAllNodes = nodes.every(function(node, i) {
-                   return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
-               });
+       function ZoomEvent(type, _ref) {
+         var sourceEvent = _ref.sourceEvent,
+             target = _ref.target,
+             transform = _ref.transform,
+             dispatch = _ref.dispatch;
+         Object.defineProperties(this, {
+           type: {
+             value: type,
+             enumerable: true,
+             configurable: true
+           },
+           sourceEvent: {
+             value: sourceEvent,
+             enumerable: true,
+             configurable: true
+           },
+           target: {
+             value: target,
+             enumerable: true,
+             configurable: true
+           },
+           transform: {
+             value: transform,
+             enumerable: true,
+             configurable: true
+           },
+           _: {
+             value: dispatch
+           }
+         });
+       }

 
 

-               if (maxDistance < 0.0001 &&
-                   // Allow straightening even if already straight in order to remove extraneous nodes
-                   keepingAllNodes) {
-                   return 'straight_enough';
-               }
-           };
+       function Transform(k, x, y) {
+         this.k = k;
+         this.x = x;
+         this.y = y;
+       }
+       Transform.prototype = {
+         constructor: Transform,
+         scale: function scale(k) {
+           return k === 1 ? this : new Transform(this.k * k, this.x, this.y);
+         },
+         translate: function translate(x, y) {
+           return x === 0 & y === 0 ? this : new Transform(this.k, this.x + this.k * x, this.y + this.k * y);
+         },
+         apply: function apply(point) {
+           return [point[0] * this.k + this.x, point[1] * this.k + this.y];
+         },
+         applyX: function applyX(x) {
+           return x * this.k + this.x;
+         },
+         applyY: function applyY(y) {
+           return y * this.k + this.y;
+         },
+         invert: function invert(location) {
+           return [(location[0] - this.x) / this.k, (location[1] - this.y) / this.k];
+         },
+         invertX: function invertX(x) {
+           return (x - this.x) / this.k;
+         },
+         invertY: function invertY(y) {
+           return (y - this.y) / this.k;
+         },
+         rescaleX: function rescaleX(x) {
+           return x.copy().domain(x.range().map(this.invertX, this).map(x.invert, x));
+         },
+         rescaleY: function rescaleY(y) {
+           return y.copy().domain(y.range().map(this.invertY, this).map(y.invert, y));
+         },
+         toString: function toString() {
+           return "translate(" + this.x + "," + this.y + ") scale(" + this.k + ")";
+         }
+       };
+       var identity$2 = new Transform(1, 0, 0);

 
 

-           action.transitionable = true;
+       function nopropagation(event) {
+         event.stopImmediatePropagation();
+       }
+       function noevent (event) {
+         event.preventDefault();
+         event.stopImmediatePropagation();
+       }

 
 

+       // except for pinch-to-zoom, which is sent as a wheel+ctrlKey event

 
 

-           return action;
+       function defaultFilter$1(event) {
+         return (!event.ctrlKey || event.type === 'wheel') && !event.button;

        }
 
        }
 

-       // `actionUnrestrictTurn` deletes a turn restriction relation.
-       //
-       // `turn` must be an `osmTurn` object with a `restrictionID` property.
-       // see osm/intersection.js, pathToTurn()
-       //
-       function actionUnrestrictTurn(turn) {
-           return function(graph) {
-               return actionDeleteRelation(turn.restrictionID)(graph);
-           };
-       }
+       function defaultExtent$1() {
+         var e = this;

 
 

-       /* Reflect the given area around its axis of symmetry */
-       function actionReflect(reflectIds, projection) {
-           var _useLongAxis = true;
-
-
-           var action = function(graph, t) {
-               if (t === null || !isFinite(t)) { t = 1; }
-               t = Math.min(Math.max(+t, 0), 1);
-
-               var nodes = utilGetAllNodes(reflectIds, graph);
-               var points = nodes.map(function(n) { return projection(n.loc); });
-               var ssr = geoGetSmallestSurroundingRectangle(points);
-
-               // Choose line pq = axis of symmetry.
-               // The shape's surrounding rectangle has 2 axes of symmetry.
-               // Reflect across the longer axis by default.
-               var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2 ];
-               var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2 ];
-               var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2 ];
-               var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2 ];
-               var p, q;
-
-               var isLong = (geoVecLength(p1, q1) > geoVecLength(p2, q2));
-               if ((_useLongAxis && isLong) || (!_useLongAxis && !isLong)) {
-                   p = p1;
-                   q = q1;
-               } else {
-                   p = p2;
-                   q = q2;
-               }
-
-               // reflect c across pq
-               // http://math.stackexchange.com/questions/65503/point-reflection-over-a-line
-               var dx = q[0] - p[0];
-               var dy = q[1] - p[1];
-               var a = (dx * dx - dy * dy) / (dx * dx + dy * dy);
-               var b = 2 * dx * dy / (dx * dx + dy * dy);
-               for (var i = 0; i < nodes.length; i++) {
-                   var node = nodes[i];
-                   var c = projection(node.loc);
-                   var c2 = [
-                       a * (c[0] - p[0]) + b * (c[1] - p[1]) + p[0],
-                       b * (c[0] - p[0]) - a * (c[1] - p[1]) + p[1]
-                   ];
-                   var loc2 = projection.invert(c2);
-                   node = node.move(geoVecInterp(node.loc, loc2, t));
-                   graph = graph.replace(node);
-               }
+         if (e instanceof SVGElement) {
+           e = e.ownerSVGElement || e;

 
 

-               return graph;
-           };
+           if (e.hasAttribute("viewBox")) {
+             e = e.viewBox.baseVal;
+             return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+           }

 
 

+           return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+         }

 
 

-           action.useLongAxis = function(val) {
-               if (!arguments.length) { return _useLongAxis; }
-               _useLongAxis = val;
-               return action;
-           };
+         return [[0, 0], [e.clientWidth, e.clientHeight]];
+       }

 
 

+       function defaultTransform() {
+         return this.__zoom || identity$2;
+       }

 
 

-           action.transitionable = true;
+       function defaultWheelDelta$1(event) {
+         return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * (event.ctrlKey ? 10 : 1);
+       }

 
 

+       function defaultTouchable() {
+         return navigator.maxTouchPoints || "ontouchstart" in this;
+       }

 
 

-           return action;
+       function defaultConstrain$1(transform, extent, translateExtent) {
+         var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
+             dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
+             dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
+             dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
+         return transform.translate(dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1));

        }
 
        }
 

-       function actionUpgradeTags(entityId, oldTags, replaceTags) {
+       function d3_zoom () {
+         var filter = defaultFilter$1,
+             extent = defaultExtent$1,
+             constrain = defaultConstrain$1,
+             wheelDelta = defaultWheelDelta$1,
+             touchable = defaultTouchable,
+             scaleExtent = [0, Infinity],
+             translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
+             duration = 250,
+             interpolate = interpolateZoom,
+             listeners = dispatch$8("start", "zoom", "end"),
+             touchstarting,
+             touchfirst,
+             touchending,
+             touchDelay = 500,
+             wheelDelay = 150,
+             clickDistance2 = 0,
+             tapDistance = 10;

 
 

-           return function(graph) {
-               var entity = graph.entity(entityId);
-               var tags = Object.assign({}, entity.tags);  // shallow copy
-               var transferValue;
-               var semiIndex;
+         function zoom(selection) {
+           selection.property("__zoom", defaultTransform).on("wheel.zoom", wheeled).on("mousedown.zoom", mousedowned).on("dblclick.zoom", dblclicked).filter(touchable).on("touchstart.zoom", touchstarted).on("touchmove.zoom", touchmoved).on("touchend.zoom touchcancel.zoom", touchended).style("-webkit-tap-highlight-color", "rgba(0,0,0,0)");
+         }

 
 

-               for (var oldTagKey in oldTags) {
-                   if (oldTags[oldTagKey] === '*') {
-                       transferValue = tags[oldTagKey];
-                       delete tags[oldTagKey];
-                   } else {
-                       var vals = tags[oldTagKey].split(';').filter(Boolean);
-                       var oldIndex = vals.indexOf(oldTags[oldTagKey]);
-                       if (vals.length === 1 || oldIndex === -1) {
-                           delete tags[oldTagKey];
-                       } else {
-                           if (replaceTags && replaceTags[oldTagKey]) {
-                               // replacing a value within a semicolon-delimited value, note the index
-                               semiIndex = oldIndex;
-                           }
-                           vals.splice(oldIndex, 1);
-                           tags[oldTagKey] = vals.join(';');
-                       }
-                   }
-               }
+         zoom.transform = function (collection, transform, point, event) {
+           var selection = collection.selection ? collection.selection() : collection;
+           selection.property("__zoom", defaultTransform);

 
 

-               if (replaceTags) {
-                   for (var replaceKey in replaceTags) {
-                       var replaceValue = replaceTags[replaceKey];
-                       if (replaceValue === '*') {
-                           if (tags[replaceKey] && tags[replaceKey] !== 'no') {
-                               // allow any pre-existing value except `no` (troll tag)
-                               continue;
-                           } else {
-                               // otherwise assume `yes` is okay
-                               tags[replaceKey] = 'yes';
-                           }
-                       } else if (replaceValue === '$1') {
-                           tags[replaceKey] = transferValue;
-                       } else {
-                           if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
-                               // don't override preexisting values
-                               var existingVals = tags[replaceKey].split(';').filter(Boolean);
-                               if (existingVals.indexOf(replaceValue) === -1) {
-                                   existingVals.splice(semiIndex, 0, replaceValue);
-                                   tags[replaceKey] = existingVals.join(';');
-                               }
-                           } else {
-                               tags[replaceKey] = replaceValue;
-                           }
-                       }
-                   }
-               }
+           if (collection !== selection) {
+             schedule(collection, transform, point, event);
+           } else {
+             selection.interrupt().each(function () {
+               gesture(this, arguments).event(event).start().zoom(null, typeof transform === "function" ? transform.apply(this, arguments) : transform).end();
+             });
+           }
+         };

 
 

-               return graph.replace(entity.update({ tags: tags }));
-           };
-       }
+         zoom.scaleBy = function (selection, k, p, event) {
+           zoom.scaleTo(selection, function () {
+             var k0 = this.__zoom.k,
+                 k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+             return k0 * k1;
+           }, p, event);
+         };

 
 

-       function behaviorEdit(context) {
+         zoom.scaleTo = function (selection, k, p, event) {
+           zoom.transform(selection, function () {
+             var e = extent.apply(this, arguments),
+                 t0 = this.__zoom,
+                 p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p,
+                 p1 = t0.invert(p0),
+                 k1 = typeof k === "function" ? k.apply(this, arguments) : k;
+             return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
+           }, p, event);
+         };

 
 

-           function behavior() {
-               context.map()
-                   .minzoom(context.minEditableZoom());
-           }
+         zoom.translateBy = function (selection, x, y, event) {
+           zoom.transform(selection, function () {
+             return constrain(this.__zoom.translate(typeof x === "function" ? x.apply(this, arguments) : x, typeof y === "function" ? y.apply(this, arguments) : y), extent.apply(this, arguments), translateExtent);
+           }, null, event);
+         };

 
 

+         zoom.translateTo = function (selection, x, y, p, event) {
+           zoom.transform(selection, function () {
+             var e = extent.apply(this, arguments),
+                 t = this.__zoom,
+                 p0 = p == null ? centroid(e) : typeof p === "function" ? p.apply(this, arguments) : p;
+             return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(typeof x === "function" ? -x.apply(this, arguments) : -x, typeof y === "function" ? -y.apply(this, arguments) : -y), e, translateExtent);
+           }, p, event);
+         };

 
 

-           behavior.off = function() {
-               context.map()
-                   .minzoom(0);
-           };
+         function scale(transform, k) {
+           k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
+           return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+         }

 
 

-           return behavior;
-       }
+         function translate(transform, p0, p1) {
+           var x = p0[0] - p1[0] * transform.k,
+               y = p0[1] - p1[1] * transform.k;
+           return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+         }

 
 

-       /*
-          The hover behavior adds the `.hover` class on pointerover to all elements to which
-          the identical datum is bound, and removes it on pointerout.
+         function centroid(extent) {
+           return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+         }

 
 

-          The :hover pseudo-class is insufficient for iD's purposes because a datum's visual
-          representation may consist of several elements scattered throughout the DOM hierarchy.
-          Only one of these elements can have the :hover pseudo-class, but all of them will
-          have the .hover class.
-        */
-       function behaviorHover(context) {
-           var dispatch$1 = dispatch('hover');
-           var _selection = select(null);
-           var _newNodeId = null;
-           var _initialNodeID = null;
-           var _altDisables;
-           var _ignoreVertex;
-           var _targets = [];
+         function schedule(transition, transform, point, event) {
+           transition.on("start.zoom", function () {
+             gesture(this, arguments).event(event).start();
+           }).on("interrupt.zoom end.zoom", function () {
+             gesture(this, arguments).event(event).end();
+           }).tween("zoom", function () {
+             var that = this,
+                 args = arguments,
+                 g = gesture(that, args).event(event),
+                 e = extent.apply(that, args),
+                 p = point == null ? centroid(e) : typeof point === "function" ? point.apply(that, args) : point,
+                 w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
+                 a = that.__zoom,
+                 b = typeof transform === "function" ? transform.apply(that, args) : transform,
+                 i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
+             return function (t) {
+               if (t === 1) t = b; // Avoid rounding error on end.
+               else {
+                   var l = i(t),
+                       k = w / l[2];
+                   t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
+                 }
+               g.zoom(null, t);
+             };
+           });
+         }

 
 

-           // use pointer events on supported platforms; fallback to mouse events
-           var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+         function gesture(that, args, clean) {
+           return !clean && that.__zooming || new Gesture(that, args);
+         }

 
 

+         function Gesture(that, args) {
+           this.that = that;
+           this.args = args;
+           this.active = 0;
+           this.sourceEvent = null;
+           this.extent = extent.apply(that, args);
+           this.taps = 0;
+         }

 
 

-           function keydown() {
-               if (_altDisables && event.keyCode === utilKeybinding.modifierCodes.alt) {
-                   _selection.selectAll('.hover')
-                       .classed('hover-suppressed', true)
-                       .classed('hover', false);
+         Gesture.prototype = {
+           event: function event(_event) {
+             if (_event) this.sourceEvent = _event;
+             return this;
+           },
+           start: function start() {
+             if (++this.active === 1) {
+               this.that.__zooming = this;
+               this.emit("start");
+             }

 
 

-                   _selection
-                       .classed('hover-disabled', true);
+             return this;
+           },
+           zoom: function zoom(key, transform) {
+             if (this.mouse && key !== "mouse") this.mouse[1] = transform.invert(this.mouse[0]);
+             if (this.touch0 && key !== "touch") this.touch0[1] = transform.invert(this.touch0[0]);
+             if (this.touch1 && key !== "touch") this.touch1[1] = transform.invert(this.touch1[0]);
+             this.that.__zoom = transform;
+             this.emit("zoom");
+             return this;
+           },
+           end: function end() {
+             if (--this.active === 0) {
+               delete this.that.__zooming;
+               this.emit("end");
+             }

 
 

-                   dispatch$1.call('hover', this, null);
-               }
+             return this;
+           },
+           emit: function emit(type) {
+             var d = select(this.that).datum();
+             listeners.call(type, this.that, new ZoomEvent(type, {
+               sourceEvent: this.sourceEvent,
+               target: zoom,
+               type: type,
+               transform: this.that.__zoom,
+               dispatch: listeners
+             }), d);

            }
            }

+         };

 
 

+         function wheeled(event) {
+           for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+             args[_key - 1] = arguments[_key];
+           }

 
 

-           function keyup() {
-               if (_altDisables && event.keyCode === utilKeybinding.modifierCodes.alt) {
-                   _selection.selectAll('.hover-suppressed')
-                       .classed('hover-suppressed', false)
-                       .classed('hover', true);
+           if (!filter.apply(this, arguments)) return;
+           var g = gesture(this, args).event(event),
+               t = this.__zoom,
+               k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
+               p = pointer(event); // If the mouse is in the same location as before, reuse it.
+           // If there were recent wheel events, reset the wheel idle timeout.

 
 

-                   _selection
-                       .classed('hover-disabled', false);
+           if (g.wheel) {
+             if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
+               g.mouse[1] = t.invert(g.mouse[0] = p);
+             }

 
 

-                   dispatch$1.call('hover', this, _targets);
+             clearTimeout(g.wheel);
+           } // If this wheel event won’t trigger a transform change, ignore it.
+           else if (t.k === k) return; // Otherwise, capture the mouse point and location at the start.
+             else {
+                 g.mouse = [p, t.invert(p)];
+                 interrupt(this);
+                 g.start();

                }
                }

-           }

 
 

+           noevent(event);
+           g.wheel = setTimeout(wheelidled, wheelDelay);
+           g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));

 
 

-           function behavior(selection) {
-               _selection = selection;
+           function wheelidled() {
+             g.wheel = null;
+             g.end();
+           }
+         }

 
 

-               _targets = [];
+         function mousedowned(event) {
+           for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
+             args[_key2 - 1] = arguments[_key2];
+           }

 
 

-               if (_initialNodeID) {
-                   _newNodeId = _initialNodeID;
-                   _initialNodeID = null;
-               } else {
-                   _newNodeId = null;
-               }
+           if (touchending || !filter.apply(this, arguments)) return;
+           var g = gesture(this, args, true).event(event),
+               v = select(event.view).on("mousemove.zoom", mousemoved, true).on("mouseup.zoom", mouseupped, true),
+               p = pointer(event, currentTarget),
+               currentTarget = event.currentTarget,
+               x0 = event.clientX,
+               y0 = event.clientY;
+           dragDisable(event.view);
+           nopropagation(event);
+           g.mouse = [p, this.__zoom.invert(p)];
+           interrupt(this);
+           g.start();

 
 

-               _selection
-                   .on(_pointerPrefix + 'over.hover', pointerover)
-                   .on(_pointerPrefix + 'out.hover', pointerout)
-                   // treat pointerdown as pointerover for touch devices
-                   .on(_pointerPrefix + 'down.hover', pointerover);
+           function mousemoved(event) {
+             noevent(event);

 
 

-               select(window)
-                   .on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true)
-                   .on('keydown.hover', keydown)
-                   .on('keyup.hover', keyup);
+             if (!g.moved) {
+               var dx = event.clientX - x0,
+                   dy = event.clientY - y0;
+               g.moved = dx * dx + dy * dy > clickDistance2;
+             }

 
 

+             g.event(event).zoom("mouse", constrain(translate(g.that.__zoom, g.mouse[0] = pointer(event, currentTarget), g.mouse[1]), g.extent, translateExtent));
+           }

 
 

-               function eventTarget() {
-                   var datum = event.target && event.target.__data__;
-                   if (typeof datum !== 'object') { return null; }
-                   if (!(datum instanceof osmEntity) && datum.properties && (datum.properties.entity instanceof osmEntity)) {
-                       return datum.properties.entity;
-                   }
-                   return datum;
-               }
+           function mouseupped(event) {
+             v.on("mousemove.zoom mouseup.zoom", null);
+             yesdrag(event.view, g.moved);
+             noevent(event);
+             g.event(event).end();
+           }
+         }

 
 

-               function pointerover() {
-                   // ignore mouse hovers with buttons pressed unless dragging
-                   if (context.mode().id.indexOf('drag') === -1 &&
-                       (!event.pointerType || event.pointerType === 'mouse') &&
-                       event.buttons) { return; }
+         function dblclicked(event) {
+           for (var _len3 = arguments.length, args = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
+             args[_key3 - 1] = arguments[_key3];
+           }

 
 

-                   var target = eventTarget();
-                   if (target && _targets.indexOf(target) === -1) {
-                       _targets.push(target);
-                       updateHover(_targets);
-                   }
-               }
+           if (!filter.apply(this, arguments)) return;
+           var t0 = this.__zoom,
+               p0 = pointer(event.changedTouches ? event.changedTouches[0] : event, this),
+               p1 = t0.invert(p0),
+               k1 = t0.k * (event.shiftKey ? 0.5 : 2),
+               t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, args), translateExtent);
+           noevent(event);
+           if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0, event);else select(this).call(zoom.transform, t1, p0, event);
+         }

 
 

-               function pointerout() {
+         function touchstarted(event) {
+           for (var _len4 = arguments.length, args = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
+             args[_key4 - 1] = arguments[_key4];
+           }

 
 

-                   var target = eventTarget();
-                   var index = _targets.indexOf(target);
-                   if (index !== -1) {
-                       _targets.splice(index);
-                       updateHover(_targets);
-                   }
-               }
+           if (!filter.apply(this, arguments)) return;
+           var touches = event.touches,
+               n = touches.length,
+               g = gesture(this, args, event.changedTouches.length === n).event(event),
+               started,
+               i,
+               t,
+               p;
+           nopropagation(event);

 
 

-               function allowsVertex(d) {
-                   return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-               }
+           for (i = 0; i < n; ++i) {
+             t = touches[i], p = pointer(t, this);
+             p = [p, this.__zoom.invert(p), t.identifier];
+             if (!g.touch0) g.touch0 = p, started = true, g.taps = 1 + !!touchstarting;else if (!g.touch1 && g.touch0[2] !== p[2]) g.touch1 = p, g.taps = 0;
+           }

 
 

-               function modeAllowsHover(target) {
-                   var mode = context.mode();
-                   if (mode.id === 'add-point') {
-                       return mode.preset.matchGeometry('vertex') ||
-                           (target.type !== 'way' && target.geometry(context.graph()) !== 'vertex');
-                   }
-                   return true;
-               }
+           if (touchstarting) touchstarting = clearTimeout(touchstarting);

 
 

-               function updateHover(targets) {
+           if (started) {
+             if (g.taps < 2) touchfirst = p[0], touchstarting = setTimeout(function () {
+               touchstarting = null;
+             }, touchDelay);
+             interrupt(this);
+             g.start();
+           }
+         }

 
 

-                   _selection.selectAll('.hover')
-                       .classed('hover', false);
-                   _selection.selectAll('.hover-suppressed')
-                       .classed('hover-suppressed', false);
+         function touchmoved(event) {
+           if (!this.__zooming) return;

 
 

-                   var mode = context.mode();
+           for (var _len5 = arguments.length, args = new Array(_len5 > 1 ? _len5 - 1 : 0), _key5 = 1; _key5 < _len5; _key5++) {
+             args[_key5 - 1] = arguments[_key5];
+           }

 
 

-                   if (!_newNodeId && (mode.id === 'draw-line' || mode.id === 'draw-area')) {
-                       var node = targets.find(function(target) {
-                           return target instanceof osmEntity && target.type === 'node';
-                       });
-                       _newNodeId = node && node.id;
-                   }
+           var g = gesture(this, args).event(event),
+               touches = event.changedTouches,
+               n = touches.length,
+               i,
+               t,
+               p,
+               l;
+           noevent(event);

 
 

-                   targets = targets.filter(function(datum) {
-                       if (datum instanceof osmEntity) {
-                           // If drawing a way, don't hover on a node that was just placed. #3974
-                           return datum.id !== _newNodeId &&
-                               (datum.type !== 'node' || !_ignoreVertex || allowsVertex(datum)) &&
-                               modeAllowsHover(datum);
-                       }
-                       return true;
-                   });
+           for (i = 0; i < n; ++i) {
+             t = touches[i], p = pointer(t, this);
+             if (g.touch0 && g.touch0[2] === t.identifier) g.touch0[0] = p;else if (g.touch1 && g.touch1[2] === t.identifier) g.touch1[0] = p;
+           }

 
 

-                   var selector = '';
+           t = g.that.__zoom;

 
 

-                   for (var i in targets) {
-                       var datum = targets[i];
+           if (g.touch1) {
+             var p0 = g.touch0[0],
+                 l0 = g.touch0[1],
+                 p1 = g.touch1[0],
+                 l1 = g.touch1[1],
+                 dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
+                 dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
+             t = scale(t, Math.sqrt(dp / dl));
+             p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
+             l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
+           } else if (g.touch0) p = g.touch0[0], l = g.touch0[1];else return;

 
 

-                       // What are we hovering over?
-                       if (datum.__featurehash__) {
-                           // hovering custom data
-                           selector += ', .data' + datum.__featurehash__;
+           g.zoom("touch", constrain(translate(t, p, l), g.extent, translateExtent));
+         }

 
 

-                       } else if (datum instanceof QAItem) {
-                           selector += ', .' + datum.service + '.itemId-' + datum.id;
+         function touchended(event) {
+           for (var _len6 = arguments.length, args = new Array(_len6 > 1 ? _len6 - 1 : 0), _key6 = 1; _key6 < _len6; _key6++) {
+             args[_key6 - 1] = arguments[_key6];
+           }

 
 

-                       } else if (datum instanceof osmNote) {
-                           selector += ', .note-' + datum.id;
+           if (!this.__zooming) return;
+           var g = gesture(this, args).event(event),
+               touches = event.changedTouches,
+               n = touches.length,
+               i,
+               t;
+           nopropagation(event);
+           if (touchending) clearTimeout(touchending);
+           touchending = setTimeout(function () {
+             touchending = null;
+           }, touchDelay);

 
 

-                       } else if (datum instanceof osmEntity) {
-                           selector += ', .' + datum.id;
-                           if (datum.type === 'relation') {
-                               for (var j in datum.members) {
-                                   selector += ', .' + datum.members[j].id;
-                               }
-                           }
-                       }
-                   }
+           for (i = 0; i < n; ++i) {
+             t = touches[i];
+             if (g.touch0 && g.touch0[2] === t.identifier) delete g.touch0;else if (g.touch1 && g.touch1[2] === t.identifier) delete g.touch1;
+           }

 
 

-                   var suppressed = _altDisables && event && event.altKey;
+           if (g.touch1 && !g.touch0) g.touch0 = g.touch1, delete g.touch1;
+           if (g.touch0) g.touch0[1] = this.__zoom.invert(g.touch0[0]);else {
+             g.end(); // If this was a dbltap, reroute to the (optional) dblclick.zoom handler.

 
 

-                   if (selector.trim().length) {
-                       // remove the first comma
-                       selector = selector.slice(1);
-                       _selection.selectAll(selector)
-                           .classed(suppressed ? 'hover-suppressed' : 'hover', true);
-                   }
+             if (g.taps === 2) {
+               t = pointer(t, this);

 
 

-                   dispatch$1.call('hover', this, !suppressed && targets);
+               if (Math.hypot(touchfirst[0] - t[0], touchfirst[1] - t[1]) < tapDistance) {
+                 var p = select(this).on("dblclick.zoom");
+                 if (p) p.apply(this, arguments);

                }
                }

+             }

            }
            }

+         }

 
 

+         zoom.wheelDelta = function (_) {
+           return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant(+_), zoom) : wheelDelta;
+         };

 
 

-           behavior.off = function(selection) {
-               selection.selectAll('.hover')
-                   .classed('hover', false);
-               selection.selectAll('.hover-suppressed')
-                   .classed('hover-suppressed', false);
-               selection
-                   .classed('hover-disabled', false);
-
-               selection
-                   .on(_pointerPrefix + 'over.hover', null)
-                   .on(_pointerPrefix + 'out.hover', null)
-                   .on(_pointerPrefix + 'down.hover', null);
+         zoom.filter = function (_) {
+           return arguments.length ? (filter = typeof _ === "function" ? _ : constant(!!_), zoom) : filter;
+         };

 
 

-               select(window)
-                   .on(_pointerPrefix + 'up.hover pointercancel.hover', null, true)
-                   .on('keydown.hover', null)
-                   .on('keyup.hover', null);
-           };
+         zoom.touchable = function (_) {
+           return arguments.length ? (touchable = typeof _ === "function" ? _ : constant(!!_), zoom) : touchable;
+         };

 
 

+         zoom.extent = function (_) {
+           return arguments.length ? (extent = typeof _ === "function" ? _ : constant([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+         };

 
 

-           behavior.altDisables = function(val) {
-               if (!arguments.length) { return _altDisables; }
-               _altDisables = val;
-               return behavior;
-           };
+         zoom.scaleExtent = function (_) {
+           return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+         };

 
 

-           behavior.ignoreVertex = function(val) {
-               if (!arguments.length) { return _ignoreVertex; }
-               _ignoreVertex = val;
-               return behavior;
-           };
+         zoom.translateExtent = function (_) {
+           return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+         };

 
 

-           behavior.initialNodeID = function(nodeId) {
-               _initialNodeID = nodeId;
-               return behavior;
-           };
+         zoom.constrain = function (_) {
+           return arguments.length ? (constrain = _, zoom) : constrain;
+         };

 
 

-           return utilRebind(behavior, dispatch$1, 'on');
-       }
+         zoom.duration = function (_) {
+           return arguments.length ? (duration = +_, zoom) : duration;
+         };

 
 

-       var _disableSpace = false;
-       var _lastSpace = null;
+         zoom.interpolate = function (_) {
+           return arguments.length ? (interpolate = _, zoom) : interpolate;
+         };

 
 

+         zoom.on = function () {
+           var value = listeners.on.apply(listeners, arguments);
+           return value === listeners ? zoom : value;
+         };

 
 

-       function behaviorDraw(context) {
-           var dispatch$1 = dispatch(
-               'move', 'down', 'downcancel', 'click', 'clickWay', 'clickNode', 'undo', 'cancel', 'finish'
-           );
+         zoom.clickDistance = function (_) {
+           return arguments.length ? (clickDistance2 = (_ = +_) * _, zoom) : Math.sqrt(clickDistance2);
+         };

 
 

-           var keybinding = utilKeybinding('draw');
+         zoom.tapDistance = function (_) {
+           return arguments.length ? (tapDistance = +_, zoom) : tapDistance;
+         };

 
 

-           var _hover = behaviorHover(context)
-               .altDisables(true)
-               .ignoreVertex(true)
-               .on('hover', context.ui().sidebar.hover);
-           var _edit = behaviorEdit(context);
+         return zoom;
+       }

 
 

-           var _closeTolerance = 4;
-           var _tolerance = 12;
-           var _mouseLeave = false;
-           var _lastMouse = null;
-           var _lastPointerUpEvent;
+       /*
+           Bypasses features of D3's default projection stream pipeline that are unnecessary:
+           * Antimeridian clipping
+           * Spherical rotation
+           * Resampling
+       */

 
 

-           var _downPointer;
+       function geoRawMercator() {
+         var project = mercatorRaw;
+         var k = 512 / Math.PI; // scale

 
 

-           // use pointer events on supported platforms; fallback to mouse events
-           var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+         var x = 0;
+         var y = 0; // translate

 
 

+         var clipExtent = [[0, 0], [0, 0]];

 
 

-           // related code
-           // - `mode/drag_node.js` `datum()`
-           function datum() {
-               var mode = context.mode();
-               var isNote = mode && (mode.id.indexOf('note') !== -1);
-               if (event.altKey || isNote) { return {}; }
+         function projection(point) {
+           point = project(point[0] * Math.PI / 180, point[1] * Math.PI / 180);
+           return [point[0] * k + x, y - point[1] * k];
+         }

 
 

-               var element;
-               if (event.type === 'keydown') {
-                   element = _lastMouse && _lastMouse.target;
-               } else {
-                   element = event.target;
-               }
+         projection.invert = function (point) {
+           point = project.invert((point[0] - x) / k, (y - point[1]) / k);
+           return point && [point[0] * 180 / Math.PI, point[1] * 180 / Math.PI];
+         };

 
 

-               // When drawing, snap only to touch targets..
-               // (this excludes area fills and active drawing elements)
-               var d = element.__data__;
-               return (d && d.properties && d.properties.target) ? d : {};
-           }
+         projection.scale = function (_) {
+           if (!arguments.length) return k;
+           k = +_;
+           return projection;
+         };

 
 

-           function pointerdown() {
+         projection.translate = function (_) {
+           if (!arguments.length) return [x, y];
+           x = +_[0];
+           y = +_[1];
+           return projection;
+         };

 
 

-               if (_downPointer) { return; }
+         projection.clipExtent = function (_) {
+           if (!arguments.length) return clipExtent;
+           clipExtent = _;
+           return projection;
+         };

 
 

-               var pointerLocGetter = utilFastMouse(this);
-               _downPointer = {
-                   id: event.pointerId || 'mouse',
-                   pointerLocGetter: pointerLocGetter,
-                   downTime: +new Date(),
-                   downLoc: pointerLocGetter(event)
-               };
+         projection.transform = function (obj) {
+           if (!arguments.length) return identity$2.translate(x, y).scale(k);
+           x = +obj.x;
+           y = +obj.y;
+           k = +obj.k;
+           return projection;
+         };

 
 

-               dispatch$1.call('down', this, datum());
+         projection.stream = d3_geoTransform({
+           point: function point(x, y) {
+             var vec = projection([x, y]);
+             this.stream.point(vec[0], vec[1]);

            }
            }

+         }).stream;
+         return projection;
+       }

 
 

-           function pointerup() {
-
-               if (!_downPointer || _downPointer.id !== (event.pointerId || 'mouse')) { return; }
-
-               var downPointer = _downPointer;
-               _downPointer = null;
-
-               _lastPointerUpEvent = event;
+       function geoOrthoNormalizedDotProduct(a, b, origin) {
+         if (geoVecEqual(origin, a) || geoVecEqual(origin, b)) {
+           return 1; // coincident points, treat as straight and try to remove
+         }

 
 

-               if (downPointer.isCancelled) { return; }
+         return geoVecNormalizedDot(a, b, origin);
+       }

 
 

-               var t2 = +new Date();
-               var p2 = downPointer.pointerLocGetter(event);
-               var dist = geoVecLength(downPointer.downLoc, p2);
+       function geoOrthoFilterDotProduct(dotp, epsilon, lowerThreshold, upperThreshold, allowStraightAngles) {
+         var val = Math.abs(dotp);
+
+         if (val < epsilon) {
+           return 0; // already orthogonal
+         } else if (allowStraightAngles && Math.abs(val - 1) < epsilon) {
+           return 0; // straight angle, which is okay in this case
+         } else if (val < lowerThreshold || val > upperThreshold) {
+           return dotp; // can be adjusted
+         } else {
+           return null; // ignore vertex
+         }
+       }

 
 

-               if (dist < _closeTolerance || (dist < _tolerance && (t2 - downPointer.downTime) < 500)) {
-                   // Prevent a quick second click
-                   select(window).on('click.draw-block', function() {
-                       event.stopPropagation();
-                   }, true);
+       function geoOrthoCalcScore(points, isClosed, epsilon, threshold) {
+         var score = 0;
+         var first = isClosed ? 0 : 1;
+         var last = isClosed ? points.length : points.length - 1;
+         var coords = points.map(function (p) {
+           return p.coord;
+         });
+         var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+         var upperThreshold = Math.cos(threshold * Math.PI / 180);

 
 

-                   context.map().dblclickZoomEnable(false);
+         for (var i = first; i < last; i++) {
+           var a = coords[(i - 1 + coords.length) % coords.length];
+           var origin = coords[i];
+           var b = coords[(i + 1) % coords.length];
+           var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold);
+           if (dotp === null) continue; // ignore vertex

 
 

-                   window.setTimeout(function() {
-                       context.map().dblclickZoomEnable(true);
-                       select(window).on('click.draw-block', null);
-                   }, 500);
+           score = score + 2.0 * Math.min(Math.abs(dotp - 1.0), Math.min(Math.abs(dotp), Math.abs(dotp + 1)));
+         }

 
 

-                   click(p2);
-               }
-           }
+         return score;
+       } // returns the maximum angle less than `lessThan` between the actual corner and a 0° or 90° corner

 
 

-           function pointermove() {
-               if (_downPointer &&
-                   _downPointer.id === (event.pointerId || 'mouse') &&
-                   !_downPointer.isCancelled) {
-                   var p2 = _downPointer.pointerLocGetter(event);
-                   var dist = geoVecLength(_downPointer.downLoc, p2);
-                   if (dist >= _closeTolerance) {
-                       _downPointer.isCancelled = true;
-                       dispatch$1.call('downcancel', this);
-                   }
-               }
+       function geoOrthoMaxOffsetAngle(coords, isClosed, lessThan) {
+         var max = -Infinity;
+         var first = isClosed ? 0 : 1;
+         var last = isClosed ? coords.length : coords.length - 1;

 
 

-               if ((event.pointerType && event.pointerType !== 'mouse') ||
-                   event.buttons ||
-                   _downPointer) { return; }
+         for (var i = first; i < last; i++) {
+           var a = coords[(i - 1 + coords.length) % coords.length];
+           var origin = coords[i];
+           var b = coords[(i + 1) % coords.length];
+           var normalizedDotP = geoOrthoNormalizedDotProduct(a, b, origin);
+           var angle = Math.acos(Math.abs(normalizedDotP)) * 180 / Math.PI;
+           if (angle > 45) angle = 90 - angle;
+           if (angle >= lessThan) continue;
+           if (angle > max) max = angle;
+         }

 
 

-               // HACK: Mobile Safari likes to send one or more `mouse` type pointermove
-               // events immediately after non-mouse pointerup events; detect and ignore them.
-               if (_lastPointerUpEvent &&
-                   _lastPointerUpEvent.pointerType !== 'mouse' &&
-                   event.timeStamp - _lastPointerUpEvent.timeStamp < 100) { return; }
+         if (max === -Infinity) return null;
+         return max;
+       } // similar to geoOrthoCalcScore, but returns quickly if there is something to do

 
 

-               _lastMouse = event;
-               dispatch$1.call('move', this, datum());
-           }
+       function geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles) {
+         var score = null;
+         var first = isClosed ? 0 : 1;
+         var last = isClosed ? coords.length : coords.length - 1;
+         var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+         var upperThreshold = Math.cos(threshold * Math.PI / 180);

 
 

-           function pointercancel() {
-               if (_downPointer &&
-                   _downPointer.id === (event.pointerId || 'mouse')) {
+         for (var i = first; i < last; i++) {
+           var a = coords[(i - 1 + coords.length) % coords.length];
+           var origin = coords[i];
+           var b = coords[(i + 1) % coords.length];
+           var dotp = geoOrthoFilterDotProduct(geoOrthoNormalizedDotProduct(a, b, origin), epsilon, lowerThreshold, upperThreshold, allowStraightAngles);
+           if (dotp === null) continue; // ignore vertex

 
 

-                   if (!_downPointer.isCancelled) {
-                       dispatch$1.call('downcancel', this);
-                   }
-                   _downPointer = null;
-               }
-           }
+           if (Math.abs(dotp) > 0) return 1; // something to do

 
 

-           function mouseenter() {
-               _mouseLeave = false;
-           }
+           score = 0; // already square
+         }

 
 

-           function mouseleave() {
-               _mouseLeave = true;
-           }
+         return score;
+       }

 
 

-           function allowsVertex(d) {
-               return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-           }
+       var $$l = _export;
+       var FREEZING = freezing;
+       var fails$9 = fails$N;
+       var isObject$4 = isObject$r;
+       var onFreeze = internalMetadata.exports.onFreeze;

 
 

-           // related code
-           // - `mode/drag_node.js`     `doMove()`
-           // - `behavior/draw.js`      `click()`
-           // - `behavior/draw_way.js`  `move()`
-           function click(loc) {
-               var d = datum();
-               var target = d && d.properties && d.properties.entity;
+       // eslint-disable-next-line es/no-object-freeze -- safe
+       var $freeze = Object.freeze;
+       var FAILS_ON_PRIMITIVES = fails$9(function () { $freeze(1); });

 
 

-               var mode = context.mode();
+       // `Object.freeze` method
+       // https://tc39.es/ecma262/#sec-object.freeze
+       $$l({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !FREEZING }, {
+         freeze: function freeze(it) {
+           return $freeze && isObject$4(it) ? $freeze(onFreeze(it)) : it;
+         }
+       });

 
 

-               if (target && target.type === 'node' && allowsVertex(target)) {   // Snap to a node
-                   dispatch$1.call('clickNode', this, target, d);
-                   return;
+       // Returns true if a and b have the same elements at the same indices.
+       function utilArrayIdentical(a, b) {
+         // an array is always identical to itself
+         if (a === b) return true;
+         var i = a.length;
+         if (i !== b.length) return false;

 
 

-               } else if (target && target.type === 'way' && (mode.id !== 'add-point' || mode.preset.matchGeometry('vertex'))) {   // Snap to a way
-                   var choice = geoChooseEdge(
-                       context.graph().childNodes(target), loc, context.projection, context.activeID()
-                   );
-                   if (choice) {
-                       var edge = [target.nodes[choice.index - 1], target.nodes[choice.index]];
-                       dispatch$1.call('clickWay', this, choice.loc, edge, d);
-                       return;
-                   }
-               } else if (mode.id !== 'add-point' || mode.preset.matchGeometry('point')) {
-                   var locLatLng = context.projection.invert(loc);
-                   dispatch$1.call('click', this, locLatLng, d);
-               }
+         while (i--) {
+           if (a[i] !== b[i]) return false;
+         }

 
 

-           }
+         return true;
+       } // http://2ality.com/2015/01/es6-set-operations.html
+       // Difference (a \ b): create a set that contains those elements of set a that are not in set b.
+       // This operation is also sometimes called minus (-).
+       // var a = [1,2,3];
+       // var b = [4,3,2];
+       // utilArrayDifference(a, b)
+       //   [1]
+       // utilArrayDifference(b, a)
+       //   [4]

 
 

-           // treat a spacebar press like a click
-           function space() {
-               event.preventDefault();
-               event.stopPropagation();
+       function utilArrayDifference(a, b) {
+         var other = new Set(b);
+         return Array.from(new Set(a)).filter(function (v) {
+           return !other.has(v);
+         });
+       } // Intersection (a ∩ b): create a set that contains those elements of set a that are also in set b.
+       // var a = [1,2,3];
+       // var b = [4,3,2];
+       // utilArrayIntersection(a, b)
+       //   [2,3]

 
 

-               var currSpace = context.map().mouse();
-               if (_disableSpace && _lastSpace) {
-                   var dist = geoVecLength(_lastSpace, currSpace);
-                   if (dist > _tolerance) {
-                       _disableSpace = false;
-                   }
-               }
+       function utilArrayIntersection(a, b) {
+         var other = new Set(b);
+         return Array.from(new Set(a)).filter(function (v) {
+           return other.has(v);
+         });
+       } // Union (a ∪ b): create a set that contains the elements of both set a and set b.
+       // var a = [1,2,3];
+       // var b = [4,3,2];
+       // utilArrayUnion(a, b)
+       //   [1,2,3,4]

 
 

-               if (_disableSpace || _mouseLeave || !_lastMouse) { return; }
+       function utilArrayUnion(a, b) {
+         var result = new Set(a);
+         b.forEach(function (v) {
+           result.add(v);
+         });
+         return Array.from(result);
+       } // Returns an Array with all the duplicates removed
+       // var a = [1,1,2,3,3];
+       // utilArrayUniq(a)
+       //   [1,2,3]

 
 

-               // user must move mouse or release space bar to allow another click
-               _lastSpace = currSpace;
-               _disableSpace = true;
+       function utilArrayUniq(a) {
+         return Array.from(new Set(a));
+       } // Splits array into chunks of given chunk size
+       // var a = [1,2,3,4,5,6,7];
+       // utilArrayChunk(a, 3);
+       //   [[1,2,3],[4,5,6],[7]];

 
 

-               select(window).on('keyup.space-block', function() {
-                   event.preventDefault();
-                   event.stopPropagation();
-                   _disableSpace = false;
-                   select(window).on('keyup.space-block', null);
-               });
+       function utilArrayChunk(a, chunkSize) {
+         if (!chunkSize || chunkSize < 0) return [a.slice()];
+         var result = new Array(Math.ceil(a.length / chunkSize));
+         return Array.from(result, function (item, i) {
+           return a.slice(i * chunkSize, i * chunkSize + chunkSize);
+         });
+       } // Flattens two level array into a single level
+       // var a = [[1,2,3],[4,5,6],[7]];
+       // utilArrayFlatten(a);
+       //   [1,2,3,4,5,6,7];

 
 

-               // get the current mouse position
-               var loc = context.map().mouse() ||
-                   // or the map center if the mouse has never entered the map
-                   context.projection(context.map().center());
-               click(loc);
-           }
+       function utilArrayFlatten(a) {
+         return a.reduce(function (acc, val) {
+           return acc.concat(val);
+         }, []);
+       } // Groups the items of the Array according to the given key
+       // `key` can be passed as a property or as a key function
+       //
+       // var pets = [
+       //     { type: 'Dog', name: 'Spot' },
+       //     { type: 'Cat', name: 'Tiger' },
+       //     { type: 'Dog', name: 'Rover' },
+       //     { type: 'Cat', name: 'Leo' }
+       // ];
+       //
+       // utilArrayGroupBy(pets, 'type')
+       //   {
+       //     'Dog': [{type: 'Dog', name: 'Spot'}, {type: 'Dog', name: 'Rover'}],
+       //     'Cat': [{type: 'Cat', name: 'Tiger'}, {type: 'Cat', name: 'Leo'}]
+       //   }
+       //
+       // utilArrayGroupBy(pets, function(item) { return item.name.length; })
+       //   {
+       //     3: [{type: 'Cat', name: 'Leo'}],
+       //     4: [{type: 'Dog', name: 'Spot'}],
+       //     5: [{type: 'Cat', name: 'Tiger'}, {type: 'Dog', name: 'Rover'}]
+       //   }

 
 

+       function utilArrayGroupBy(a, key) {
+         return a.reduce(function (acc, item) {
+           var group = typeof key === 'function' ? key(item) : item[key];
+           (acc[group] = acc[group] || []).push(item);
+           return acc;
+         }, {});
+       } // Returns an Array with all the duplicates removed
+       // where uniqueness determined by the given key
+       // `key` can be passed as a property or as a key function
+       //
+       // var pets = [
+       //     { type: 'Dog', name: 'Spot' },
+       //     { type: 'Cat', name: 'Tiger' },
+       //     { type: 'Dog', name: 'Rover' },
+       //     { type: 'Cat', name: 'Leo' }
+       // ];
+       //
+       // utilArrayUniqBy(pets, 'type')
+       //   [
+       //     { type: 'Dog', name: 'Spot' },
+       //     { type: 'Cat', name: 'Tiger' }
+       //   ]
+       //
+       // utilArrayUniqBy(pets, function(item) { return item.name.length; })
+       //   [
+       //     { type: 'Dog', name: 'Spot' },
+       //     { type: 'Cat', name: 'Tiger' },
+       //     { type: 'Cat', name: 'Leo' }
+       //   }

 
 

-           function backspace() {
-               event.preventDefault();
-               dispatch$1.call('undo');
+       function utilArrayUniqBy(a, key) {
+         var seen = new Set();
+         return a.reduce(function (acc, item) {
+           var val = typeof key === 'function' ? key(item) : item[key];
+
+           if (val && !seen.has(val)) {
+             seen.add(val);
+             acc.push(item);
+           }
+
+           return acc;
+         }, []);
+       }
+
+       var DESCRIPTORS$2 = descriptors;
+       var global$2 = global$F;
+       var isForced = isForced_1;
+       var redefine$1 = redefine$g.exports;
+       var has = has$j;
+       var classof$1 = classofRaw$1;
+       var inheritIfRequired = inheritIfRequired$4;
+       var toPrimitive$1 = toPrimitive$7;
+       var fails$8 = fails$N;
+       var create$2 = objectCreate;
+       var getOwnPropertyNames = objectGetOwnPropertyNames.f;
+       var getOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
+       var defineProperty = objectDefineProperty.f;
+       var trim$2 = stringTrim.trim;
+
+       var NUMBER = 'Number';
+       var NativeNumber = global$2[NUMBER];
+       var NumberPrototype = NativeNumber.prototype;
+
+       // Opera ~12 has broken Object#toString
+       var BROKEN_CLASSOF = classof$1(create$2(NumberPrototype)) == NUMBER;
+
+       // `ToNumber` abstract operation
+       // https://tc39.es/ecma262/#sec-tonumber
+       var toNumber$1 = function (argument) {
+         var it = toPrimitive$1(argument, false);
+         var first, third, radix, maxCode, digits, length, index, code;
+         if (typeof it == 'string' && it.length > 2) {
+           it = trim$2(it);
+           first = it.charCodeAt(0);
+           if (first === 43 || first === 45) {
+             third = it.charCodeAt(2);
+             if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix
+           } else if (first === 48) {
+             switch (it.charCodeAt(1)) {
+               case 66: case 98: radix = 2; maxCode = 49; break; // fast equal of /^0b[01]+$/i
+               case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i
+               default: return +it;
+             }
+             digits = it.slice(2);
+             length = digits.length;
+             for (index = 0; index < length; index++) {
+               code = digits.charCodeAt(index);
+               // parseInt parses a string to a first unavailable symbol
+               // but ToNumber should return NaN if a string contains unavailable symbols
+               if (code < 48 || code > maxCode) return NaN;
+             } return parseInt(digits, radix);
+           }
+         } return +it;
+       };
+
+       // `Number` constructor
+       // https://tc39.es/ecma262/#sec-number-constructor
+       if (isForced(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {
+         var NumberWrapper = function Number(value) {
+           var it = arguments.length < 1 ? 0 : value;
+           var dummy = this;
+           return dummy instanceof NumberWrapper
+             // check on 1..constructor(foo) case
+             && (BROKEN_CLASSOF ? fails$8(function () { NumberPrototype.valueOf.call(dummy); }) : classof$1(dummy) != NUMBER)
+               ? inheritIfRequired(new NativeNumber(toNumber$1(it)), dummy, NumberWrapper) : toNumber$1(it);
+         };
+         for (var keys = DESCRIPTORS$2 ? getOwnPropertyNames(NativeNumber) : (
+           // ES3:
+           'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +
+           // ES2015 (in case, if modules with ES2015 Number statics required before):
+           'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +
+           'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger,' +
+           // ESNext
+           'fromString,range'
+         ).split(','), j$1 = 0, key; keys.length > j$1; j$1++) {
+           if (has(NativeNumber, key = keys[j$1]) && !has(NumberWrapper, key)) {
+             defineProperty(NumberWrapper, key, getOwnPropertyDescriptor$2(NativeNumber, key));
+           }
+         }
+         NumberWrapper.prototype = NumberPrototype;
+         NumberPrototype.constructor = NumberWrapper;
+         redefine$1(global$2, NUMBER, NumberWrapper);
+       }
+
+       var fixRegExpWellKnownSymbolLogic$1 = fixRegexpWellKnownSymbolLogic;
+       var anObject$1 = anObject$m;
+       var toLength$3 = toLength$q;
+       var requireObjectCoercible$7 = requireObjectCoercible$e;
+       var advanceStringIndex = advanceStringIndex$3;
+       var regExpExec$1 = regexpExecAbstract;
+
+       // @@match logic
+       fixRegExpWellKnownSymbolLogic$1('match', function (MATCH, nativeMatch, maybeCallNative) {
+         return [
+           // `String.prototype.match` method
+           // https://tc39.es/ecma262/#sec-string.prototype.match
+           function match(regexp) {
+             var O = requireObjectCoercible$7(this);
+             var matcher = regexp == undefined ? undefined : regexp[MATCH];
+             return matcher !== undefined ? matcher.call(regexp, O) : new RegExp(regexp)[MATCH](String(O));
+           },
+           // `RegExp.prototype[@@match]` method
+           // https://tc39.es/ecma262/#sec-regexp.prototype-@@match
+           function (string) {
+             var res = maybeCallNative(nativeMatch, this, string);
+             if (res.done) return res.value;
+
+             var rx = anObject$1(this);
+             var S = String(string);
+
+             if (!rx.global) return regExpExec$1(rx, S);
+
+             var fullUnicode = rx.unicode;
+             rx.lastIndex = 0;
+             var A = [];
+             var n = 0;
+             var result;
+             while ((result = regExpExec$1(rx, S)) !== null) {
+               var matchStr = String(result[0]);
+               A[n] = matchStr;
+               if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength$3(rx.lastIndex), fullUnicode);
+               n++;
+             }
+             return n === 0 ? null : A;

            }
            }

+         ];
+       });

 
 

+       var diacritics = {};
+
+       var remove$6 = diacritics.remove = removeDiacritics;
+       var replacementList = [{
+         base: ' ',
+         chars: "\xA0"
+       }, {
+         base: '0',
+         chars: "\u07C0"
+       }, {
+         base: 'A',
+         chars: "\u24B6\uFF21\xC0\xC1\xC2\u1EA6\u1EA4\u1EAA\u1EA8\xC3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\xC4\u01DE\u1EA2\xC5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F"
+       }, {
+         base: 'AA',
+         chars: "\uA732"
+       }, {
+         base: 'AE',
+         chars: "\xC6\u01FC\u01E2"
+       }, {
+         base: 'AO',
+         chars: "\uA734"
+       }, {
+         base: 'AU',
+         chars: "\uA736"
+       }, {
+         base: 'AV',
+         chars: "\uA738\uA73A"
+       }, {
+         base: 'AY',
+         chars: "\uA73C"
+       }, {
+         base: 'B',
+         chars: "\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0181"
+       }, {
+         base: 'C',
+         chars: "\u24B8\uFF23\uA73E\u1E08\u0106C\u0108\u010A\u010C\xC7\u0187\u023B"
+       }, {
+         base: 'D',
+         chars: "\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018A\u0189\u1D05\uA779"
+       }, {
+         base: 'Dh',
+         chars: "\xD0"
+       }, {
+         base: 'DZ',
+         chars: "\u01F1\u01C4"
+       }, {
+         base: 'Dz',
+         chars: "\u01F2\u01C5"
+       }, {
+         base: 'E',
+         chars: "\u025B\u24BA\uFF25\xC8\xC9\xCA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\xCB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E\u1D07"
+       }, {
+         base: 'F',
+         chars: "\uA77C\u24BB\uFF26\u1E1E\u0191\uA77B"
+       }, {
+         base: 'G',
+         chars: "\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E\u0262"
+       }, {
+         base: 'H',
+         chars: "\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D"
+       }, {
+         base: 'I',
+         chars: "\u24BE\uFF29\xCC\xCD\xCE\u0128\u012A\u012C\u0130\xCF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197"
+       }, {
+         base: 'J',
+         chars: "\u24BF\uFF2A\u0134\u0248\u0237"
+       }, {
+         base: 'K',
+         chars: "\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2"
+       }, {
+         base: 'L',
+         chars: "\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780"
+       }, {
+         base: 'LJ',
+         chars: "\u01C7"
+       }, {
+         base: 'Lj',
+         chars: "\u01C8"
+       }, {
+         base: 'M',
+         chars: "\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C\u03FB"
+       }, {
+         base: 'N',
+         chars: "\uA7A4\u0220\u24C3\uFF2E\u01F8\u0143\xD1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u019D\uA790\u1D0E"
+       }, {
+         base: 'NJ',
+         chars: "\u01CA"
+       }, {
+         base: 'Nj',
+         chars: "\u01CB"
+       }, {
+         base: 'O',
+         chars: "\u24C4\uFF2F\xD2\xD3\xD4\u1ED2\u1ED0\u1ED6\u1ED4\xD5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\xD6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\xD8\u01FE\u0186\u019F\uA74A\uA74C"
+       }, {
+         base: 'OE',
+         chars: "\u0152"
+       }, {
+         base: 'OI',
+         chars: "\u01A2"
+       }, {
+         base: 'OO',
+         chars: "\uA74E"
+       }, {
+         base: 'OU',
+         chars: "\u0222"
+       }, {
+         base: 'P',
+         chars: "\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754"
+       }, {
+         base: 'Q',
+         chars: "\u24C6\uFF31\uA756\uA758\u024A"
+       }, {
+         base: 'R',
+         chars: "\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782"
+       }, {
+         base: 'S',
+         chars: "\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784"
+       }, {
+         base: 'T',
+         chars: "\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786"
+       }, {
+         base: 'Th',
+         chars: "\xDE"
+       }, {
+         base: 'TZ',
+         chars: "\uA728"
+       }, {
+         base: 'U',
+         chars: "\u24CA\uFF35\xD9\xDA\xDB\u0168\u1E78\u016A\u1E7A\u016C\xDC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244"
+       }, {
+         base: 'V',
+         chars: "\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245"
+       }, {
+         base: 'VY',
+         chars: "\uA760"
+       }, {
+         base: 'W',
+         chars: "\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72"
+       }, {
+         base: 'X',
+         chars: "\u24CD\uFF38\u1E8A\u1E8C"
+       }, {
+         base: 'Y',
+         chars: "\u24CE\uFF39\u1EF2\xDD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE"
+       }, {
+         base: 'Z',
+         chars: "\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762"
+       }, {
+         base: 'a',
+         chars: "\u24D0\uFF41\u1E9A\xE0\xE1\xE2\u1EA7\u1EA5\u1EAB\u1EA9\xE3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\xE4\u01DF\u1EA3\xE5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250\u0251"
+       }, {
+         base: 'aa',
+         chars: "\uA733"
+       }, {
+         base: 'ae',
+         chars: "\xE6\u01FD\u01E3"
+       }, {
+         base: 'ao',
+         chars: "\uA735"
+       }, {
+         base: 'au',
+         chars: "\uA737"
+       }, {
+         base: 'av',
+         chars: "\uA739\uA73B"
+       }, {
+         base: 'ay',
+         chars: "\uA73D"
+       }, {
+         base: 'b',
+         chars: "\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253\u0182"
+       }, {
+         base: 'c',
+         chars: "\uFF43\u24D2\u0107\u0109\u010B\u010D\xE7\u1E09\u0188\u023C\uA73F\u2184"
+       }, {
+         base: 'd',
+         chars: "\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\u018B\u13E7\u0501\uA7AA"
+       }, {
+         base: 'dh',
+         chars: "\xF0"
+       }, {
+         base: 'dz',
+         chars: "\u01F3\u01C6"
+       }, {
+         base: 'e',
+         chars: "\u24D4\uFF45\xE8\xE9\xEA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\xEB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u01DD"
+       }, {
+         base: 'f',
+         chars: "\u24D5\uFF46\u1E1F\u0192"
+       }, {
+         base: 'ff',
+         chars: "\uFB00"
+       }, {
+         base: 'fi',
+         chars: "\uFB01"
+       }, {
+         base: 'fl',
+         chars: "\uFB02"
+       }, {
+         base: 'ffi',
+         chars: "\uFB03"
+       }, {
+         base: 'ffl',
+         chars: "\uFB04"
+       }, {
+         base: 'g',
+         chars: "\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\uA77F\u1D79"
+       }, {
+         base: 'h',
+         chars: "\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265"
+       }, {
+         base: 'hv',
+         chars: "\u0195"
+       }, {
+         base: 'i',
+         chars: "\u24D8\uFF49\xEC\xED\xEE\u0129\u012B\u012D\xEF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131"
+       }, {
+         base: 'j',
+         chars: "\u24D9\uFF4A\u0135\u01F0\u0249"
+       }, {
+         base: 'k',
+         chars: "\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3"
+       }, {
+         base: 'l',
+         chars: "\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747\u026D"
+       }, {
+         base: 'lj',
+         chars: "\u01C9"
+       }, {
+         base: 'm',
+         chars: "\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F"
+       }, {
+         base: 'n',
+         chars: "\u24DD\uFF4E\u01F9\u0144\xF1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5\u043B\u0509"
+       }, {
+         base: 'nj',
+         chars: "\u01CC"
+       }, {
+         base: 'o',
+         chars: "\u24DE\uFF4F\xF2\xF3\xF4\u1ED3\u1ED1\u1ED7\u1ED5\xF5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\xF6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\xF8\u01FF\uA74B\uA74D\u0275\u0254\u1D11"
+       }, {
+         base: 'oe',
+         chars: "\u0153"
+       }, {
+         base: 'oi',
+         chars: "\u01A3"
+       }, {
+         base: 'oo',
+         chars: "\uA74F"
+       }, {
+         base: 'ou',
+         chars: "\u0223"
+       }, {
+         base: 'p',
+         chars: "\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755\u03C1"
+       }, {
+         base: 'q',
+         chars: "\u24E0\uFF51\u024B\uA757\uA759"
+       }, {
+         base: 'r',
+         chars: "\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783"
+       }, {
+         base: 's',
+         chars: "\u24E2\uFF53\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B\u0282"
+       }, {
+         base: 'ss',
+         chars: "\xDF"
+       }, {
+         base: 't',
+         chars: "\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787"
+       }, {
+         base: 'th',
+         chars: "\xFE"
+       }, {
+         base: 'tz',
+         chars: "\uA729"
+       }, {
+         base: 'u',
+         chars: "\u24E4\uFF55\xF9\xFA\xFB\u0169\u1E79\u016B\u1E7B\u016D\xFC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289"
+       }, {
+         base: 'v',
+         chars: "\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C"
+       }, {
+         base: 'vy',
+         chars: "\uA761"
+       }, {
+         base: 'w',
+         chars: "\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73"
+       }, {
+         base: 'x',
+         chars: "\u24E7\uFF58\u1E8B\u1E8D"
+       }, {
+         base: 'y',
+         chars: "\u24E8\uFF59\u1EF3\xFD\u0177\u1EF9\u0233\u1E8F\xFF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF"
+       }, {
+         base: 'z',
+         chars: "\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763"
+       }];
+       var diacriticsMap = {};

 
 

-           function del() {
-               event.preventDefault();
-               dispatch$1.call('cancel');
-           }
+       for (var i$1 = 0; i$1 < replacementList.length; i$1 += 1) {
+         var chars = replacementList[i$1].chars;

 
 

+         for (var j = 0; j < chars.length; j += 1) {
+           diacriticsMap[chars[j]] = replacementList[i$1].base;
+         }
+       }

 
 

-           function ret() {
-               event.preventDefault();
-               dispatch$1.call('finish');
-           }
+       function removeDiacritics(str) {
+         return str.replace(/[^\u0000-\u007e]/g, function (c) {
+           return diacriticsMap[c] || c;
+         });
+       }

 
 

+       diacritics.replacementList = replacementList;
+       diacritics.diacriticsMap = diacriticsMap;

 
 

-           function behavior(selection) {
-               context.install(_hover);
-               context.install(_edit);
+       var lib = {};

 
 

-               _downPointer = null;
+       var isArabic$1 = {};

 
 

-               keybinding
-                   .on('⌫', backspace)
-                   .on('⌦', del)
-                   .on('⎋', ret)
-                   .on('↩', ret)
-                   .on('space', space)
-                   .on('⌥space', space);
+       Object.defineProperty(isArabic$1, "__esModule", {
+         value: true
+       });
+       var arabicBlocks = [[0x0600, 0x06FF], [0x0750, 0x077F], [0x08A0, 0x08FF], [0xFB50, 0xFDFF], [0xFE70, 0xFEFF], [0x10E60, 0x10E7F], [0x1EC70, 0x1ECBF], [0x1EE00, 0x1EEFF] // Mathematical Alphabetic symbols https://www.unicode.org/charts/PDF/U1EE00.pdf
+       ];

 
 

-               selection
-                   .on('mouseenter.draw', mouseenter)
-                   .on('mouseleave.draw', mouseleave)
-                   .on(_pointerPrefix + 'down.draw', pointerdown)
-                   .on(_pointerPrefix + 'move.draw', pointermove);
+       function isArabic(_char) {
+         if (_char.length > 1) {
+           // allow the newer chars?
+           throw new Error('isArabic works on only one-character strings');
+         }

 
 

-               select(window)
-                   .on(_pointerPrefix + 'up.draw', pointerup, true)
-                   .on('pointercancel.draw', pointercancel, true);
+         var code = _char.charCodeAt(0);

 
 

-               select(document)
-                   .call(keybinding);
+         for (var i = 0; i < arabicBlocks.length; i++) {
+           var block = arabicBlocks[i];

 
 

-               return behavior;
+           if (code >= block[0] && code <= block[1]) {
+             return true;

            }
            }

+         }

 
 

+         return false;
+       }

 
 

-           behavior.off = function(selection) {
-               context.ui().sidebar.hover.cancel();
-               context.uninstall(_hover);
-               context.uninstall(_edit);
+       isArabic$1.isArabic = isArabic;

 
 

-               selection
-                   .on('mouseenter.draw', null)
-                   .on('mouseleave.draw', null)
-                   .on(_pointerPrefix + 'down.draw', null)
-                   .on(_pointerPrefix + 'move.draw', null);
+       function isMath(_char2) {
+         if (_char2.length > 2) {
+           // allow the newer chars?
+           throw new Error('isMath works on only one-character strings');
+         }

 
 

-               select(window)
-                   .on(_pointerPrefix + 'up.draw', null)
-                   .on('pointercancel.draw', null);
-                   // note: keyup.space-block, click.draw-block should remain
+         var code = _char2.charCodeAt(0);

 
 

-               select(document)
-                   .call(keybinding.unbind);
-           };
+         return code >= 0x660 && code <= 0x66C || code >= 0x6F0 && code <= 0x6F9;
+       }

 
 

+       isArabic$1.isMath = isMath;

 
 

-           behavior.hover = function() {
-               return _hover;
-           };
+       var GlyphSplitter$1 = {};

 
 

+       var reference = {};

 
 

-           return utilRebind(behavior, dispatch$1, 'on');
-       }
+       var unicodeArabic = {};

 
 

-       function initRange(domain, range) {
-         switch (arguments.length) {
-           case 0: break;
-           case 1: this.range(domain); break;
-           default: this.range(range).domain(domain); break;
+       Object.defineProperty(unicodeArabic, "__esModule", {
+         value: true
+       });
+       var arabicReference = {
+         "alef": {
+           "normal": ["\u0627"],
+           "madda_above": {
+             "normal": ["\u0627\u0653", "\u0622"],
+             "isolated": "\uFE81",
+             "final": "\uFE82"
+           },
+           "hamza_above": {
+             "normal": ["\u0627\u0654", "\u0623"],
+             "isolated": "\uFE83",
+             "final": "\uFE84"
+           },
+           "hamza_below": {
+             "normal": ["\u0627\u0655", "\u0625"],
+             "isolated": "\uFE87",
+             "final": "\uFE88"
+           },
+           "wasla": {
+             "normal": "\u0671",
+             "isolated": "\uFB50",
+             "final": "\uFB51"
+           },
+           "wavy_hamza_above": ["\u0672"],
+           "wavy_hamza_below": ["\u0627\u065F", "\u0673"],
+           "high_hamza": ["\u0675", "\u0627\u0674"],
+           "indic_two_above": ["\u0773"],
+           "indic_three_above": ["\u0774"],
+           "fathatan": {
+             "normal": ["\u0627\u064B"],
+             "final": "\uFD3C",
+             "isolated": "\uFD3D"
+           },
+           "isolated": "\uFE8D",
+           "final": "\uFE8E"
+         },
+         "beh": {
+           "normal": ["\u0628"],
+           "dotless": ["\u066E"],
+           "three_dots_horizontally_below": ["\u0750"],
+           "dot_below_three_dots_above": ["\u0751"],
+           "three_dots_pointing_upwards_below": ["\u0752"],
+           "three_dots_pointing_upwards_below_two_dots_above": ["\u0753"],
+           "two_dots_below_dot_above": ["\u0754"],
+           "inverted_small_v_below": ["\u0755"],
+           "small_v": ["\u0756"],
+           "small_v_below": ["\u08A0"],
+           "hamza_above": ["\u08A1"],
+           "small_meem_above": ["\u08B6"],
+           "isolated": "\uFE8F",
+           "final": "\uFE90",
+           "initial": "\uFE91",
+           "medial": "\uFE92"
+         },
+         "teh marbuta": {
+           "normal": ["\u0629"],
+           "isolated": "\uFE93",
+           "final": "\uFE94"
+         },
+         "teh": {
+           "normal": ["\u062A"],
+           "ring": ["\u067C"],
+           "three_dots_above_downwards": ["\u067D"],
+           "small_teh_above": ["\u08B8"],
+           "isolated": "\uFE95",
+           "final": "\uFE96",
+           "initial": "\uFE97",
+           "medial": "\uFE98"
+         },
+         "theh": {
+           "normal": ["\u062B"],
+           "isolated": "\uFE99",
+           "final": "\uFE9A",
+           "initial": "\uFE9B",
+           "medial": "\uFE9C"
+         },
+         "jeem": {
+           "normal": ["\u062C"],
+           "two_dots_above": ["\u08A2"],
+           "isolated": "\uFE9D",
+           "final": "\uFE9E",
+           "initial": "\uFE9F",
+           "medial": "\uFEA0"
+         },
+         "hah": {
+           "normal": ["\u062D"],
+           "hamza_above": ["\u0681"],
+           "two_dots_vertical_above": ["\u0682"],
+           "three_dots_above": ["\u0685"],
+           "two_dots_above": ["\u0757"],
+           "three_dots_pointing_upwards_below": ["\u0758"],
+           "small_tah_below": ["\u076E"],
+           "small_tah_two_dots": ["\u076F"],
+           "small_tah_above": ["\u0772"],
+           "indic_four_below": ["\u077C"],
+           "isolated": "\uFEA1",
+           "final": "\uFEA2",
+           "initial": "\uFEA3",
+           "medial": "\uFEA4"
+         },
+         "khah": {
+           "normal": ["\u062E"],
+           "isolated": "\uFEA5",
+           "final": "\uFEA6",
+           "initial": "\uFEA7",
+           "medial": "\uFEA8"
+         },
+         "dal": {
+           "normal": ["\u062F"],
+           "ring": ["\u0689"],
+           "dot_below": ["\u068A"],
+           "dot_below_small_tah": ["\u068B"],
+           "three_dots_above_downwards": ["\u068F"],
+           "four_dots_above": ["\u0690"],
+           "inverted_v": ["\u06EE"],
+           "two_dots_vertically_below_small_tah": ["\u0759"],
+           "inverted_small_v_below": ["\u075A"],
+           "three_dots_below": ["\u08AE"],
+           "isolated": "\uFEA9",
+           "final": "\uFEAA"
+         },
+         "thal": {
+           "normal": ["\u0630"],
+           "isolated": "\uFEAB",
+           "final": "\uFEAC"
+         },
+         "reh": {
+           "normal": ["\u0631"],
+           "small_v": ["\u0692"],
+           "ring": ["\u0693"],
+           "dot_below": ["\u0694"],
+           "small_v_below": ["\u0695"],
+           "dot_below_dot_above": ["\u0696"],
+           "two_dots_above": ["\u0697"],
+           "four_dots_above": ["\u0699"],
+           "inverted_v": ["\u06EF"],
+           "stroke": ["\u075B"],
+           "two_dots_vertically_above": ["\u076B"],
+           "hamza_above": ["\u076C"],
+           "small_tah_two_dots": ["\u0771"],
+           "loop": ["\u08AA"],
+           "small_noon_above": ["\u08B9"],
+           "isolated": "\uFEAD",
+           "final": "\uFEAE"
+         },
+         "zain": {
+           "normal": ["\u0632"],
+           "inverted_v_above": ["\u08B2"],
+           "isolated": "\uFEAF",
+           "final": "\uFEB0"
+         },
+         "seen": {
+           "normal": ["\u0633"],
+           "dot_below_dot_above": ["\u069A"],
+           "three_dots_below": ["\u069B"],
+           "three_dots_below_three_dots_above": ["\u069C"],
+           "four_dots_above": ["\u075C"],
+           "two_dots_vertically_above": ["\u076D"],
+           "small_tah_two_dots": ["\u0770"],
+           "indic_four_above": ["\u077D"],
+           "inverted_v": ["\u077E"],
+           "isolated": "\uFEB1",
+           "final": "\uFEB2",
+           "initial": "\uFEB3",
+           "medial": "\uFEB4"
+         },
+         "sheen": {
+           "normal": ["\u0634"],
+           "dot_below": ["\u06FA"],
+           "isolated": "\uFEB5",
+           "final": "\uFEB6",
+           "initial": "\uFEB7",
+           "medial": "\uFEB8"
+         },
+         "sad": {
+           "normal": ["\u0635"],
+           "two_dots_below": ["\u069D"],
+           "three_dots_above": ["\u069E"],
+           "three_dots_below": ["\u08AF"],
+           "isolated": "\uFEB9",
+           "final": "\uFEBA",
+           "initial": "\uFEBB",
+           "medial": "\uFEBC"
+         },
+         "dad": {
+           "normal": ["\u0636"],
+           "dot_below": ["\u06FB"],
+           "isolated": "\uFEBD",
+           "final": "\uFEBE",
+           "initial": "\uFEBF",
+           "medial": "\uFEC0"
+         },
+         "tah": {
+           "normal": ["\u0637"],
+           "three_dots_above": ["\u069F"],
+           "two_dots_above": ["\u08A3"],
+           "isolated": "\uFEC1",
+           "final": "\uFEC2",
+           "initial": "\uFEC3",
+           "medial": "\uFEC4"
+         },
+         "zah": {
+           "normal": ["\u0638"],
+           "isolated": "\uFEC5",
+           "final": "\uFEC6",
+           "initial": "\uFEC7",
+           "medial": "\uFEC8"
+         },
+         "ain": {
+           "normal": ["\u0639"],
+           "three_dots_above": ["\u06A0"],
+           "two_dots_above": ["\u075D"],
+           "three_dots_pointing_downwards_above": ["\u075E"],
+           "two_dots_vertically_above": ["\u075F"],
+           "three_dots_below": ["\u08B3"],
+           "isolated": "\uFEC9",
+           "final": "\uFECA",
+           "initial": "\uFECB",
+           "medial": "\uFECC"
+         },
+         "ghain": {
+           "normal": ["\u063A"],
+           "dot_below": ["\u06FC"],
+           "isolated": "\uFECD",
+           "final": "\uFECE",
+           "initial": "\uFECF",
+           "medial": "\uFED0"
+         },
+         "feh": {
+           "normal": ["\u0641"],
+           "dotless": ["\u06A1"],
+           "dot_moved_below": ["\u06A2"],
+           "dot_below": ["\u06A3"],
+           "three_dots_below": ["\u06A5"],
+           "two_dots_below": ["\u0760"],
+           "three_dots_pointing_upwards_below": ["\u0761"],
+           "dot_below_three_dots_above": ["\u08A4"],
+           "isolated": "\uFED1",
+           "final": "\uFED2",
+           "initial": "\uFED3",
+           "medial": "\uFED4"
+         },
+         "qaf": {
+           "normal": ["\u0642"],
+           "dotless": ["\u066F"],
+           "dot_above": ["\u06A7"],
+           "three_dots_above": ["\u06A8"],
+           "dot_below": ["\u08A5"],
+           "isolated": "\uFED5",
+           "final": "\uFED6",
+           "initial": "\uFED7",
+           "medial": "\uFED8"
+         },
+         "kaf": {
+           "normal": ["\u0643"],
+           "swash": ["\u06AA"],
+           "ring": ["\u06AB"],
+           "dot_above": ["\u06AC"],
+           "three_dots_below": ["\u06AE"],
+           "two_dots_above": ["\u077F"],
+           "dot_below": ["\u08B4"],
+           "isolated": "\uFED9",
+           "final": "\uFEDA",
+           "initial": "\uFEDB",
+           "medial": "\uFEDC"
+         },
+         "lam": {
+           "normal": ["\u0644"],
+           "small_v": ["\u06B5"],
+           "dot_above": ["\u06B6"],
+           "three_dots_above": ["\u06B7"],
+           "three_dots_below": ["\u06B8"],
+           "bar": ["\u076A"],
+           "double_bar": ["\u08A6"],
+           "isolated": "\uFEDD",
+           "final": "\uFEDE",
+           "initial": "\uFEDF",
+           "medial": "\uFEE0"
+         },
+         "meem": {
+           "normal": ["\u0645"],
+           "dot_above": ["\u0765"],
+           "dot_below": ["\u0766"],
+           "three_dots_above": ["\u08A7"],
+           "isolated": "\uFEE1",
+           "final": "\uFEE2",
+           "initial": "\uFEE3",
+           "medial": "\uFEE4"
+         },
+         "noon": {
+           "normal": ["\u0646"],
+           "dot_below": ["\u06B9"],
+           "ring": ["\u06BC"],
+           "three_dots_above": ["\u06BD"],
+           "two_dots_below": ["\u0767"],
+           "small_tah": ["\u0768"],
+           "small_v": ["\u0769"],
+           "isolated": "\uFEE5",
+           "final": "\uFEE6",
+           "initial": "\uFEE7",
+           "medial": "\uFEE8"
+         },
+         "heh": {
+           "normal": ["\u0647"],
+           "isolated": "\uFEE9",
+           "final": "\uFEEA",
+           "initial": "\uFEEB",
+           "medial": "\uFEEC"
+         },
+         "waw": {
+           "normal": ["\u0648"],
+           "hamza_above": {
+             "normal": ["\u0624", "\u0648\u0654"],
+             "isolated": "\uFE85",
+             "final": "\uFE86"
+           },
+           "high_hamza": ["\u0676", "\u0648\u0674"],
+           "ring": ["\u06C4"],
+           "two_dots_above": ["\u06CA"],
+           "dot_above": ["\u06CF"],
+           "indic_two_above": ["\u0778"],
+           "indic_three_above": ["\u0779"],
+           "dot_within": ["\u08AB"],
+           "isolated": "\uFEED",
+           "final": "\uFEEE"
+         },
+         "alef_maksura": {
+           "normal": ["\u0649"],
+           "hamza_above": ["\u0626", "\u064A\u0654"],
+           "initial": "\uFBE8",
+           "medial": "\uFBE9",
+           "isolated": "\uFEEF",
+           "final": "\uFEF0"
+         },
+         "yeh": {
+           "normal": ["\u064A"],
+           "hamza_above": {
+             "normal": ["\u0626", "\u0649\u0654"],
+             "isolated": "\uFE89",
+             "final": "\uFE8A",
+             "initial": "\uFE8B",
+             "medial": "\uFE8C"
+           },
+           "two_dots_below_hamza_above": ["\u08A8"],
+           "high_hamza": ["\u0678", "\u064A\u0674"],
+           "tail": ["\u06CD"],
+           "small_v": ["\u06CE"],
+           "three_dots_below": ["\u06D1"],
+           "two_dots_below_dot_above": ["\u08A9"],
+           "two_dots_below_small_noon_above": ["\u08BA"],
+           "isolated": "\uFEF1",
+           "final": "\uFEF2",
+           "initial": "\uFEF3",
+           "medial": "\uFEF4"
+         },
+         "tteh": {
+           "normal": ["\u0679"],
+           "isolated": "\uFB66",
+           "final": "\uFB67",
+           "initial": "\uFB68",
+           "medial": "\uFB69"
+         },
+         "tteheh": {
+           "normal": ["\u067A"],
+           "isolated": "\uFB5E",
+           "final": "\uFB5F",
+           "initial": "\uFB60",
+           "medial": "\uFB61"
+         },
+         "beeh": {
+           "normal": ["\u067B"],
+           "isolated": "\uFB52",
+           "final": "\uFB53",
+           "initial": "\uFB54",
+           "medial": "\uFB55"
+         },
+         "peh": {
+           "normal": ["\u067E"],
+           "small_meem_above": ["\u08B7"],
+           "isolated": "\uFB56",
+           "final": "\uFB57",
+           "initial": "\uFB58",
+           "medial": "\uFB59"
+         },
+         "teheh": {
+           "normal": ["\u067F"],
+           "isolated": "\uFB62",
+           "final": "\uFB63",
+           "initial": "\uFB64",
+           "medial": "\uFB65"
+         },
+         "beheh": {
+           "normal": ["\u0680"],
+           "isolated": "\uFB5A",
+           "final": "\uFB5B",
+           "initial": "\uFB5C",
+           "medial": "\uFB5D"
+         },
+         "nyeh": {
+           "normal": ["\u0683"],
+           "isolated": "\uFB76",
+           "final": "\uFB77",
+           "initial": "\uFB78",
+           "medial": "\uFB79"
+         },
+         "dyeh": {
+           "normal": ["\u0684"],
+           "isolated": "\uFB72",
+           "final": "\uFB73",
+           "initial": "\uFB74",
+           "medial": "\uFB75"
+         },
+         "tcheh": {
+           "normal": ["\u0686"],
+           "dot_above": ["\u06BF"],
+           "isolated": "\uFB7A",
+           "final": "\uFB7B",
+           "initial": "\uFB7C",
+           "medial": "\uFB7D"
+         },
+         "tcheheh": {
+           "normal": ["\u0687"],
+           "isolated": "\uFB7E",
+           "final": "\uFB7F",
+           "initial": "\uFB80",
+           "medial": "\uFB81"
+         },
+         "ddal": {
+           "normal": ["\u0688"],
+           "isolated": "\uFB88",
+           "final": "\uFB89"
+         },
+         "dahal": {
+           "normal": ["\u068C"],
+           "isolated": "\uFB84",
+           "final": "\uFB85"
+         },
+         "ddahal": {
+           "normal": ["\u068D"],
+           "isolated": "\uFB82",
+           "final": "\uFB83"
+         },
+         "dul": {
+           "normal": ["\u068F", "\u068E"],
+           "isolated": "\uFB86",
+           "final": "\uFB87"
+         },
+         "rreh": {
+           "normal": ["\u0691"],
+           "isolated": "\uFB8C",
+           "final": "\uFB8D"
+         },
+         "jeh": {
+           "normal": ["\u0698"],
+           "isolated": "\uFB8A",
+           "final": "\uFB8B"
+         },
+         "veh": {
+           "normal": ["\u06A4"],
+           "isolated": "\uFB6A",
+           "final": "\uFB6B",
+           "initial": "\uFB6C",
+           "medial": "\uFB6D"
+         },
+         "peheh": {
+           "normal": ["\u06A6"],
+           "isolated": "\uFB6E",
+           "final": "\uFB6F",
+           "initial": "\uFB70",
+           "medial": "\uFB71"
+         },
+         "keheh": {
+           "normal": ["\u06A9"],
+           "dot_above": ["\u0762"],
+           "three_dots_above": ["\u0763"],
+           "three_dots_pointing_upwards_below": ["\u0764"],
+           "isolated": "\uFB8E",
+           "final": "\uFB8F",
+           "initial": "\uFB90",
+           "medial": "\uFB91"
+         },
+         "ng": {
+           "normal": ["\u06AD"],
+           "isolated": "\uFBD3",
+           "final": "\uFBD4",
+           "initial": "\uFBD5",
+           "medial": "\uFBD6"
+         },
+         "gaf": {
+           "normal": ["\u06AF"],
+           "ring": ["\u06B0"],
+           "two_dots_below": ["\u06B2"],
+           "three_dots_above": ["\u06B4"],
+           "inverted_stroke": ["\u08B0"],
+           "isolated": "\uFB92",
+           "final": "\uFB93",
+           "initial": "\uFB94",
+           "medial": "\uFB95"
+         },
+         "ngoeh": {
+           "normal": ["\u06B1"],
+           "isolated": "\uFB9A",
+           "final": "\uFB9B",
+           "initial": "\uFB9C",
+           "medial": "\uFB9D"
+         },
+         "gueh": {
+           "normal": ["\u06B3"],
+           "isolated": "\uFB96",
+           "final": "\uFB97",
+           "initial": "\uFB98",
+           "medial": "\uFB99"
+         },
+         "noon ghunna": {
+           "normal": ["\u06BA"],
+           "isolated": "\uFB9E",
+           "final": "\uFB9F"
+         },
+         "rnoon": {
+           "normal": ["\u06BB"],
+           "isolated": "\uFBA0",
+           "final": "\uFBA1",
+           "initial": "\uFBA2",
+           "medial": "\uFBA3"
+         },
+         "heh doachashmee": {
+           "normal": ["\u06BE"],
+           "isolated": "\uFBAA",
+           "final": "\uFBAB",
+           "initial": "\uFBAC",
+           "medial": "\uFBAD"
+         },
+         "heh goal": {
+           "normal": ["\u06C1"],
+           "hamza_above": ["\u06C1\u0654", "\u06C2"],
+           "isolated": "\uFBA6",
+           "final": "\uFBA7",
+           "initial": "\uFBA8",
+           "medial": "\uFBA9"
+         },
+         "teh marbuta goal": {
+           "normal": ["\u06C3"]
+         },
+         "kirghiz oe": {
+           "normal": ["\u06C5"],
+           "isolated": "\uFBE0",
+           "final": "\uFBE1"
+         },
+         "oe": {
+           "normal": ["\u06C6"],
+           "isolated": "\uFBD9",
+           "final": "\uFBDA"
+         },
+         "u": {
+           "normal": ["\u06C7"],
+           "hamza_above": {
+             "normal": ["\u0677", "\u06C7\u0674"],
+             "isolated": "\uFBDD"
+           },
+           "isolated": "\uFBD7",
+           "final": "\uFBD8"
+         },
+         "yu": {
+           "normal": ["\u06C8"],
+           "isolated": "\uFBDB",
+           "final": "\uFBDC"
+         },
+         "kirghiz yu": {
+           "normal": ["\u06C9"],
+           "isolated": "\uFBE2",
+           "final": "\uFBE3"
+         },
+         "ve": {
+           "normal": ["\u06CB"],
+           "isolated": "\uFBDE",
+           "final": "\uFBDF"
+         },
+         "farsi yeh": {
+           "normal": ["\u06CC"],
+           "indic_two_above": ["\u0775"],
+           "indic_three_above": ["\u0776"],
+           "indic_four_above": ["\u0777"],
+           "isolated": "\uFBFC",
+           "final": "\uFBFD",
+           "initial": "\uFBFE",
+           "medial": "\uFBFF"
+         },
+         "e": {
+           "normal": ["\u06D0"],
+           "isolated": "\uFBE4",
+           "final": "\uFBE5",
+           "initial": "\uFBE6",
+           "medial": "\uFBE7"
+         },
+         "yeh barree": {
+           "normal": ["\u06D2"],
+           "hamza_above": {
+             "normal": ["\u06D2\u0654", "\u06D3"],
+             "isolated": "\uFBB0",
+             "final": "\uFBB1"
+           },
+           "indic_two_above": ["\u077A"],
+           "indic_three_above": ["\u077B"],
+           "isolated": "\uFBAE",
+           "final": "\uFBAF"
+         },
+         "ae": {
+           "normal": ["\u06D5"],
+           "isolated": "\u06D5",
+           "final": "\uFEEA",
+           "yeh_above": {
+             "normal": ["\u06C0", "\u06D5\u0654"],
+             "isolated": "\uFBA4",
+             "final": "\uFBA5"
+           }
+         },
+         "rohingya yeh": {
+           "normal": ["\u08AC"]
+         },
+         "low alef": {
+           "normal": ["\u08AD"]
+         },
+         "straight waw": {
+           "normal": ["\u08B1"]
+         },
+         "african feh": {
+           "normal": ["\u08BB"]
+         },
+         "african qaf": {
+           "normal": ["\u08BC"]
+         },
+         "african noon": {
+           "normal": ["\u08BD"]

          }
          }

-         return this;
-       }
+       };

 
 

-       var prefix = "$";
+       unicodeArabic["default"] = arabicReference;

 
 

-       function Map$1() {}
+       var unicodeLigatures = {};

 
 

-       Map$1.prototype = map$2.prototype = {
-         constructor: Map$1,
-         has: function(key) {
-           return (prefix + key) in this;
+       Object.defineProperty(unicodeLigatures, "__esModule", {
+         value: true
+       });
+       var ligatureReference = {
+         "\u0626\u0627": {
+           "isolated": "\uFBEA",
+           "final": "\uFBEB"
+         },
+         "\u0626\u06D5": {
+           "isolated": "\uFBEC",
+           "final": "\uFBED"
+         },
+         "\u0626\u0648": {
+           "isolated": "\uFBEE",
+           "final": "\uFBEF"
+         },
+         "\u0626\u06C7": {
+           "isolated": "\uFBF0",
+           "final": "\uFBF1"
+         },
+         "\u0626\u06C6": {
+           "isolated": "\uFBF2",
+           "final": "\uFBF3"
+         },
+         "\u0626\u06C8": {
+           "isolated": "\uFBF4",
+           "final": "\uFBF5"
+         },
+         "\u0626\u06D0": {
+           "isolated": "\uFBF6",
+           "final": "\uFBF7",
+           "initial": "\uFBF8"
+         },
+         "\u0626\u0649": {
+           "uighur_kirghiz": {
+             "isolated": "\uFBF9",
+             "final": "\uFBFA",
+             "initial": "\uFBFB"
+           },
+           "isolated": "\uFC03",
+           "final": "\uFC68"
+         },
+         "\u0626\u062C": {
+           "isolated": "\uFC00",
+           "initial": "\uFC97"
+         },
+         "\u0626\u062D": {
+           "isolated": "\uFC01",
+           "initial": "\uFC98"
+         },
+         "\u0626\u0645": {
+           "isolated": "\uFC02",
+           "final": "\uFC66",
+           "initial": "\uFC9A",
+           "medial": "\uFCDF"
+         },
+         "\u0626\u064A": {
+           "isolated": "\uFC04",
+           "final": "\uFC69"
+         },
+         "\u0628\u062C": {
+           "isolated": "\uFC05",
+           "initial": "\uFC9C"
+         },
+         "\u0628\u062D": {
+           "isolated": "\uFC06",
+           "initial": "\uFC9D"
+         },
+         "\u0628\u062E": {
+           "isolated": "\uFC07",
+           "initial": "\uFC9E"
+         },
+         "\u0628\u0645": {
+           "isolated": "\uFC08",
+           "final": "\uFC6C",
+           "initial": "\uFC9F",
+           "medial": "\uFCE1"
+         },
+         "\u0628\u0649": {
+           "isolated": "\uFC09",
+           "final": "\uFC6E"
+         },
+         "\u0628\u064A": {
+           "isolated": "\uFC0A",
+           "final": "\uFC6F"
+         },
+         "\u062A\u062C": {
+           "isolated": "\uFC0B",
+           "initial": "\uFCA1"
+         },
+         "\u062A\u062D": {
+           "isolated": "\uFC0C",
+           "initial": "\uFCA2"
+         },
+         "\u062A\u062E": {
+           "isolated": "\uFC0D",
+           "initial": "\uFCA3"
+         },
+         "\u062A\u0645": {
+           "isolated": "\uFC0E",
+           "final": "\uFC72",
+           "initial": "\uFCA4",
+           "medial": "\uFCE3"
+         },
+         "\u062A\u0649": {
+           "isolated": "\uFC0F",
+           "final": "\uFC74"
+         },
+         "\u062A\u064A": {
+           "isolated": "\uFC10",
+           "final": "\uFC75"
+         },
+         "\u062B\u062C": {
+           "isolated": "\uFC11"
+         },
+         "\u062B\u0645": {
+           "isolated": "\uFC12",
+           "final": "\uFC78",
+           "initial": "\uFCA6",
+           "medial": "\uFCE5"
+         },
+         "\u062B\u0649": {
+           "isolated": "\uFC13",
+           "final": "\uFC7A"
+         },
+         "\u062B\u0648": {
+           "isolated": "\uFC14"
+         },
+         "\u062C\u062D": {
+           "isolated": "\uFC15",
+           "initial": "\uFCA7"
+         },
+         "\u062C\u0645": {
+           "isolated": "\uFC16",
+           "initial": "\uFCA8"
+         },
+         "\u062D\u062C": {
+           "isolated": "\uFC17",
+           "initial": "\uFCA9"
+         },
+         "\u062D\u0645": {
+           "isolated": "\uFC18",
+           "initial": "\uFCAA"
+         },
+         "\u062E\u062C": {
+           "isolated": "\uFC19",
+           "initial": "\uFCAB"
+         },
+         "\u062E\u062D": {
+           "isolated": "\uFC1A"
+         },
+         "\u062E\u0645": {
+           "isolated": "\uFC1B",
+           "initial": "\uFCAC"
+         },
+         "\u0633\u062C": {
+           "isolated": "\uFC1C",
+           "initial": "\uFCAD",
+           "medial": "\uFD34"
+         },
+         "\u0633\u062D": {
+           "isolated": "\uFC1D",
+           "initial": "\uFCAE",
+           "medial": "\uFD35"
+         },
+         "\u0633\u062E": {
+           "isolated": "\uFC1E",
+           "initial": "\uFCAF",
+           "medial": "\uFD36"

          },
          },

-         get: function(key) {
-           return this[prefix + key];
+         "\u0633\u0645": {
+           "isolated": "\uFC1F",
+           "initial": "\uFCB0",
+           "medial": "\uFCE7"

          },
          },

-         set: function(key, value) {
-           this[prefix + key] = value;
-           return this;
+         "\u0635\u062D": {
+           "isolated": "\uFC20",
+           "initial": "\uFCB1"

          },
          },

-         remove: function(key) {
-           var property = prefix + key;
-           return property in this && delete this[property];
+         "\u0635\u0645": {
+           "isolated": "\uFC21",
+           "initial": "\uFCB3"

          },
          },

-         clear: function() {
-           for (var property in this) { if (property[0] === prefix) { delete this[property]; } }
+         "\u0636\u062C": {
+           "isolated": "\uFC22",
+           "initial": "\uFCB4"

          },
          },

-         keys: function() {
-           var keys = [];
-           for (var property in this) { if (property[0] === prefix) { keys.push(property.slice(1)); } }
-           return keys;
+         "\u0636\u062D": {
+           "isolated": "\uFC23",
+           "initial": "\uFCB5"

          },
          },

-         values: function() {
-           var values = [];
-           for (var property in this) { if (property[0] === prefix) { values.push(this[property]); } }
-           return values;
+         "\u0636\u062E": {
+           "isolated": "\uFC24",
+           "initial": "\uFCB6"

          },
          },

-         entries: function() {
-           var entries = [];
-           for (var property in this) { if (property[0] === prefix) { entries.push({key: property.slice(1), value: this[property]}); } }
-           return entries;
+         "\u0636\u0645": {
+           "isolated": "\uFC25",
+           "initial": "\uFCB7"

          },
          },

-         size: function() {
-           var size = 0;
-           for (var property in this) { if (property[0] === prefix) { ++size; } }
-           return size;
+         "\u0637\u062D": {
+           "isolated": "\uFC26",
+           "initial": "\uFCB8"

          },
          },

-         empty: function() {
-           for (var property in this) { if (property[0] === prefix) { return false; } }
-           return true;
+         "\u0637\u0645": {
+           "isolated": "\uFC27",
+           "initial": "\uFD33",
+           "medial": "\uFD3A"

          },
          },

-         each: function(f) {
-           for (var property in this) { if (property[0] === prefix) { f(this[property], property.slice(1), this); } }
-         }
-       };
-
-       function map$2(object, f) {
-         var map = new Map$1;
-
-         // Copy constructor.
-         if (object instanceof Map$1) { object.each(function(value, key) { map.set(key, value); }); }
+         "\u0638\u0645": {
+           "isolated": "\uFC28",
+           "initial": "\uFCB9",
+           "medial": "\uFD3B"
+         },
+         "\u0639\u062C": {
+           "isolated": "\uFC29",
+           "initial": "\uFCBA"
+         },
+         "\u0639\u0645": {
+           "isolated": "\uFC2A",
+           "initial": "\uFCBB"
+         },
+         "\u063A\u062C": {
+           "isolated": "\uFC2B",
+           "initial": "\uFCBC"
+         },
+         "\u063A\u0645": {
+           "isolated": "\uFC2C",
+           "initial": "\uFCBD"
+         },
+         "\u0641\u062C": {
+           "isolated": "\uFC2D",
+           "initial": "\uFCBE"
+         },
+         "\u0641\u062D": {
+           "isolated": "\uFC2E",
+           "initial": "\uFCBF"
+         },
+         "\u0641\u062E": {
+           "isolated": "\uFC2F",
+           "initial": "\uFCC0"
+         },
+         "\u0641\u0645": {
+           "isolated": "\uFC30",
+           "initial": "\uFCC1"
+         },
+         "\u0641\u0649": {
+           "isolated": "\uFC31",
+           "final": "\uFC7C"
+         },
+         "\u0641\u064A": {
+           "isolated": "\uFC32",
+           "final": "\uFC7D"
+         },
+         "\u0642\u062D": {
+           "isolated": "\uFC33",
+           "initial": "\uFCC2"
+         },
+         "\u0642\u0645": {
+           "isolated": "\uFC34",
+           "initial": "\uFCC3"
+         },
+         "\u0642\u0649": {
+           "isolated": "\uFC35",
+           "final": "\uFC7E"
+         },
+         "\u0642\u064A": {
+           "isolated": "\uFC36",
+           "final": "\uFC7F"
+         },
+         "\u0643\u0627": {
+           "isolated": "\uFC37",
+           "final": "\uFC80"
+         },
+         "\u0643\u062C": {
+           "isolated": "\uFC38",
+           "initial": "\uFCC4"
+         },
+         "\u0643\u062D": {
+           "isolated": "\uFC39",
+           "initial": "\uFCC5"
+         },
+         "\u0643\u062E": {
+           "isolated": "\uFC3A",
+           "initial": "\uFCC6"
+         },
+         "\u0643\u0644": {
+           "isolated": "\uFC3B",
+           "final": "\uFC81",
+           "initial": "\uFCC7",
+           "medial": "\uFCEB"
+         },
+         "\u0643\u0645": {
+           "isolated": "\uFC3C",
+           "final": "\uFC82",
+           "initial": "\uFCC8",
+           "medial": "\uFCEC"
+         },
+         "\u0643\u0649": {
+           "isolated": "\uFC3D",
+           "final": "\uFC83"
+         },
+         "\u0643\u064A": {
+           "isolated": "\uFC3E",
+           "final": "\uFC84"
+         },
+         "\u0644\u062C": {
+           "isolated": "\uFC3F",
+           "initial": "\uFCC9"
+         },
+         "\u0644\u062D": {
+           "isolated": "\uFC40",
+           "initial": "\uFCCA"
+         },
+         "\u0644\u062E": {
+           "isolated": "\uFC41",
+           "initial": "\uFCCB"
+         },
+         "\u0644\u0645": {
+           "isolated": "\uFC42",
+           "final": "\uFC85",
+           "initial": "\uFCCC",
+           "medial": "\uFCED"
+         },
+         "\u0644\u0649": {
+           "isolated": "\uFC43",
+           "final": "\uFC86"
+         },
+         "\u0644\u064A": {
+           "isolated": "\uFC44",
+           "final": "\uFC87"
+         },
+         "\u0645\u062C": {
+           "isolated": "\uFC45",
+           "initial": "\uFCCE"
+         },
+         "\u0645\u062D": {
+           "isolated": "\uFC46",
+           "initial": "\uFCCF"
+         },
+         "\u0645\u062E": {
+           "isolated": "\uFC47",
+           "initial": "\uFCD0"
+         },
+         "\u0645\u0645": {
+           "isolated": "\uFC48",
+           "final": "\uFC89",
+           "initial": "\uFCD1"
+         },
+         "\u0645\u0649": {
+           "isolated": "\uFC49"
+         },
+         "\u0645\u064A": {
+           "isolated": "\uFC4A"
+         },
+         "\u0646\u062C": {
+           "isolated": "\uFC4B",
+           "initial": "\uFCD2"
+         },
+         "\u0646\u062D": {
+           "isolated": "\uFC4C",
+           "initial": "\uFCD3"
+         },
+         "\u0646\u062E": {
+           "isolated": "\uFC4D",
+           "initial": "\uFCD4"
+         },
+         "\u0646\u0645": {
+           "isolated": "\uFC4E",
+           "final": "\uFC8C",
+           "initial": "\uFCD5",
+           "medial": "\uFCEE"
+         },
+         "\u0646\u0649": {
+           "isolated": "\uFC4F",
+           "final": "\uFC8E"
+         },
+         "\u0646\u064A": {
+           "isolated": "\uFC50",
+           "final": "\uFC8F"
+         },
+         "\u0647\u062C": {
+           "isolated": "\uFC51",
+           "initial": "\uFCD7"
+         },
+         "\u0647\u0645": {
+           "isolated": "\uFC52",
+           "initial": "\uFCD8"
+         },
+         "\u0647\u0649": {
+           "isolated": "\uFC53"
+         },
+         "\u0647\u064A": {
+           "isolated": "\uFC54"
+         },
+         "\u064A\u062C": {
+           "isolated": "\uFC55",
+           "initial": "\uFCDA"
+         },
+         "\u064A\u062D": {
+           "isolated": "\uFC56",
+           "initial": "\uFCDB"
+         },
+         "\u064A\u062E": {
+           "isolated": "\uFC57",
+           "initial": "\uFCDC"
+         },
+         "\u064A\u0645": {
+           "isolated": "\uFC58",
+           "final": "\uFC93",
+           "initial": "\uFCDD",
+           "medial": "\uFCF0"
+         },
+         "\u064A\u0649": {
+           "isolated": "\uFC59",
+           "final": "\uFC95"
+         },
+         "\u064A\u064A": {
+           "isolated": "\uFC5A",
+           "final": "\uFC96"
+         },
+         "\u0630\u0670": {
+           "isolated": "\uFC5B"
+         },
+         "\u0631\u0670": {
+           "isolated": "\uFC5C"
+         },
+         "\u0649\u0670": {
+           "isolated": "\uFC5D",
+           "final": "\uFC90"
+         },
+         "\u064C\u0651": {
+           "isolated": "\uFC5E"
+         },
+         "\u064D\u0651": {
+           "isolated": "\uFC5F"
+         },
+         "\u064E\u0651": {
+           "isolated": "\uFC60"
+         },
+         "\u064F\u0651": {
+           "isolated": "\uFC61"
+         },
+         "\u0650\u0651": {
+           "isolated": "\uFC62"
+         },
+         "\u0651\u0670": {
+           "isolated": "\uFC63"
+         },
+         "\u0626\u0631": {
+           "final": "\uFC64"
+         },
+         "\u0626\u0632": {
+           "final": "\uFC65"
+         },
+         "\u0626\u0646": {
+           "final": "\uFC67"
+         },
+         "\u0628\u0631": {
+           "final": "\uFC6A"
+         },
+         "\u0628\u0632": {
+           "final": "\uFC6B"
+         },
+         "\u0628\u0646": {
+           "final": "\uFC6D"
+         },
+         "\u062A\u0631": {
+           "final": "\uFC70"
+         },
+         "\u062A\u0632": {
+           "final": "\uFC71"
+         },
+         "\u062A\u0646": {
+           "final": "\uFC73"
+         },
+         "\u062B\u0631": {
+           "final": "\uFC76"
+         },
+         "\u062B\u0632": {
+           "final": "\uFC77"
+         },
+         "\u062B\u0646": {
+           "final": "\uFC79"
+         },
+         "\u062B\u064A": {
+           "final": "\uFC7B"
+         },
+         "\u0645\u0627": {
+           "final": "\uFC88"
+         },
+         "\u0646\u0631": {
+           "final": "\uFC8A"
+         },
+         "\u0646\u0632": {
+           "final": "\uFC8B"
+         },
+         "\u0646\u0646": {
+           "final": "\uFC8D"
+         },
+         "\u064A\u0631": {
+           "final": "\uFC91"
+         },
+         "\u064A\u0632": {
+           "final": "\uFC92"
+         },
+         "\u064A\u0646": {
+           "final": "\uFC94"
+         },
+         "\u0626\u062E": {
+           "initial": "\uFC99"
+         },
+         "\u0626\u0647": {
+           "initial": "\uFC9B",
+           "medial": "\uFCE0"
+         },
+         "\u0628\u0647": {
+           "initial": "\uFCA0",
+           "medial": "\uFCE2"
+         },
+         "\u062A\u0647": {
+           "initial": "\uFCA5",
+           "medial": "\uFCE4"
+         },
+         "\u0635\u062E": {
+           "initial": "\uFCB2"
+         },
+         "\u0644\u0647": {
+           "initial": "\uFCCD"
+         },
+         "\u0646\u0647": {
+           "initial": "\uFCD6",
+           "medial": "\uFCEF"
+         },
+         "\u0647\u0670": {
+           "initial": "\uFCD9"
+         },
+         "\u064A\u0647": {
+           "initial": "\uFCDE",
+           "medial": "\uFCF1"
+         },
+         "\u062B\u0647": {
+           "medial": "\uFCE6"
+         },
+         "\u0633\u0647": {
+           "medial": "\uFCE8",
+           "initial": "\uFD31"
+         },
+         "\u0634\u0645": {
+           "medial": "\uFCE9",
+           "isolated": "\uFD0C",
+           "final": "\uFD28",
+           "initial": "\uFD30"
+         },
+         "\u0634\u0647": {
+           "medial": "\uFCEA",
+           "initial": "\uFD32"
+         },
+         "\u0640\u064E\u0651": {
+           "medial": "\uFCF2"
+         },
+         "\u0640\u064F\u0651": {
+           "medial": "\uFCF3"
+         },
+         "\u0640\u0650\u0651": {
+           "medial": "\uFCF4"
+         },
+         "\u0637\u0649": {
+           "isolated": "\uFCF5",
+           "final": "\uFD11"
+         },
+         "\u0637\u064A": {
+           "isolated": "\uFCF6",
+           "final": "\uFD12"
+         },
+         "\u0639\u0649": {
+           "isolated": "\uFCF7",
+           "final": "\uFD13"
+         },
+         "\u0639\u064A": {
+           "isolated": "\uFCF8",
+           "final": "\uFD14"
+         },
+         "\u063A\u0649": {
+           "isolated": "\uFCF9",
+           "final": "\uFD15"
+         },
+         "\u063A\u064A": {
+           "isolated": "\uFCFA",
+           "final": "\uFD16"
+         },
+         "\u0633\u0649": {
+           "isolated": "\uFCFB"
+         },
+         "\u0633\u064A": {
+           "isolated": "\uFCFC",
+           "final": "\uFD18"
+         },
+         "\u0634\u0649": {
+           "isolated": "\uFCFD",
+           "final": "\uFD19"
+         },
+         "\u0634\u064A": {
+           "isolated": "\uFCFE",
+           "final": "\uFD1A"
+         },
+         "\u062D\u0649": {
+           "isolated": "\uFCFF",
+           "final": "\uFD1B"
+         },
+         "\u062D\u064A": {
+           "isolated": "\uFD00",
+           "final": "\uFD1C"
+         },
+         "\u062C\u0649": {
+           "isolated": "\uFD01",
+           "final": "\uFD1D"
+         },
+         "\u062C\u064A": {
+           "isolated": "\uFD02",
+           "final": "\uFD1E"
+         },
+         "\u062E\u0649": {
+           "isolated": "\uFD03",
+           "final": "\uFD1F"
+         },
+         "\u062E\u064A": {
+           "isolated": "\uFD04",
+           "final": "\uFD20"
+         },
+         "\u0635\u0649": {
+           "isolated": "\uFD05",
+           "final": "\uFD21"
+         },
+         "\u0635\u064A": {
+           "isolated": "\uFD06",
+           "final": "\uFD22"
+         },
+         "\u0636\u0649": {
+           "isolated": "\uFD07",
+           "final": "\uFD23"
+         },
+         "\u0636\u064A": {
+           "isolated": "\uFD08",
+           "final": "\uFD24"
+         },
+         "\u0634\u062C": {
+           "isolated": "\uFD09",
+           "final": "\uFD25",
+           "initial": "\uFD2D",
+           "medial": "\uFD37"
+         },
+         "\u0634\u062D": {
+           "isolated": "\uFD0A",
+           "final": "\uFD26",
+           "initial": "\uFD2E",
+           "medial": "\uFD38"
+         },
+         "\u0634\u062E": {
+           "isolated": "\uFD0B",
+           "final": "\uFD27",
+           "initial": "\uFD2F",
+           "medial": "\uFD39"
+         },
+         "\u0634\u0631": {
+           "isolated": "\uFD0D",
+           "final": "\uFD29"
+         },
+         "\u0633\u0631": {
+           "isolated": "\uFD0E",
+           "final": "\uFD2A"
+         },
+         "\u0635\u0631": {
+           "isolated": "\uFD0F",
+           "final": "\uFD2B"
+         },
+         "\u0636\u0631": {
+           "isolated": "\uFD10",
+           "final": "\uFD2C"
+         },
+         "\u0633\u0639": {
+           "final": "\uFD17"
+         },
+         "\u062A\u062C\u0645": {
+           "initial": "\uFD50"
+         },
+         "\u062A\u062D\u062C": {
+           "final": "\uFD51",
+           "initial": "\uFD52"
+         },
+         "\u062A\u062D\u0645": {
+           "initial": "\uFD53"
+         },
+         "\u062A\u062E\u0645": {
+           "initial": "\uFD54"
+         },
+         "\u062A\u0645\u062C": {
+           "initial": "\uFD55"
+         },
+         "\u062A\u0645\u062D": {
+           "initial": "\uFD56"
+         },
+         "\u062A\u0645\u062E": {
+           "initial": "\uFD57"
+         },
+         "\u062C\u0645\u062D": {
+           "final": "\uFD58",
+           "initial": "\uFD59"
+         },
+         "\u062D\u0645\u064A": {
+           "final": "\uFD5A"
+         },
+         "\u062D\u0645\u0649": {
+           "final": "\uFD5B"
+         },
+         "\u0633\u062D\u062C": {
+           "initial": "\uFD5C"
+         },
+         "\u0633\u062C\u062D": {
+           "initial": "\uFD5D"
+         },
+         "\u0633\u062C\u0649": {
+           "final": "\uFD5E"
+         },
+         "\u0633\u0645\u062D": {
+           "final": "\uFD5F",
+           "initial": "\uFD60"
+         },
+         "\u0633\u0645\u062C": {
+           "initial": "\uFD61"
+         },
+         "\u0633\u0645\u0645": {
+           "final": "\uFD62",
+           "initial": "\uFD63"
+         },
+         "\u0635\u062D\u062D": {
+           "final": "\uFD64",
+           "initial": "\uFD65"
+         },
+         "\u0635\u0645\u0645": {
+           "final": "\uFD66",
+           "initial": "\uFDC5"
+         },
+         "\u0634\u062D\u0645": {
+           "final": "\uFD67",
+           "initial": "\uFD68"
+         },
+         "\u0634\u062C\u064A": {
+           "final": "\uFD69"
+         },
+         "\u0634\u0645\u062E": {
+           "final": "\uFD6A",
+           "initial": "\uFD6B"
+         },
+         "\u0634\u0645\u0645": {
+           "final": "\uFD6C",
+           "initial": "\uFD6D"
+         },
+         "\u0636\u062D\u0649": {
+           "final": "\uFD6E"
+         },
+         "\u0636\u062E\u0645": {
+           "final": "\uFD6F",
+           "initial": "\uFD70"
+         },
+         "\u0636\u0645\u062D": {
+           "final": "\uFD71"
+         },
+         "\u0637\u0645\u062D": {
+           "initial": "\uFD72"
+         },
+         "\u0637\u0645\u0645": {
+           "initial": "\uFD73"
+         },
+         "\u0637\u0645\u064A": {
+           "final": "\uFD74"
+         },
+         "\u0639\u062C\u0645": {
+           "final": "\uFD75",
+           "initial": "\uFDC4"
+         },
+         "\u0639\u0645\u0645": {
+           "final": "\uFD76",
+           "initial": "\uFD77"
+         },
+         "\u0639\u0645\u0649": {
+           "final": "\uFD78"
+         },
+         "\u063A\u0645\u0645": {
+           "final": "\uFD79"
+         },
+         "\u063A\u0645\u064A": {
+           "final": "\uFD7A"
+         },
+         "\u063A\u0645\u0649": {
+           "final": "\uFD7B"
+         },
+         "\u0641\u062E\u0645": {
+           "final": "\uFD7C",
+           "initial": "\uFD7D"
+         },
+         "\u0642\u0645\u062D": {
+           "final": "\uFD7E",
+           "initial": "\uFDB4"
+         },
+         "\u0642\u0645\u0645": {
+           "final": "\uFD7F"
+         },
+         "\u0644\u062D\u0645": {
+           "final": "\uFD80",
+           "initial": "\uFDB5"
+         },
+         "\u0644\u062D\u064A": {
+           "final": "\uFD81"
+         },
+         "\u0644\u062D\u0649": {
+           "final": "\uFD82"
+         },
+         "\u0644\u062C\u062C": {
+           "initial": "\uFD83",
+           "final": "\uFD84"
+         },
+         "\u0644\u062E\u0645": {
+           "final": "\uFD85",
+           "initial": "\uFD86"
+         },
+         "\u0644\u0645\u062D": {
+           "final": "\uFD87",
+           "initial": "\uFD88"
+         },
+         "\u0645\u062D\u062C": {
+           "initial": "\uFD89"
+         },
+         "\u0645\u062D\u0645": {
+           "initial": "\uFD8A"
+         },
+         "\u0645\u062D\u064A": {
+           "final": "\uFD8B"
+         },
+         "\u0645\u062C\u062D": {
+           "initial": "\uFD8C"
+         },
+         "\u0645\u062C\u0645": {
+           "initial": "\uFD8D"
+         },
+         "\u0645\u062E\u062C": {
+           "initial": "\uFD8E"
+         },
+         "\u0645\u062E\u0645": {
+           "initial": "\uFD8F"
+         },
+         "\u0645\u062C\u062E": {
+           "initial": "\uFD92"
+         },
+         "\u0647\u0645\u062C": {
+           "initial": "\uFD93"
+         },
+         "\u0647\u0645\u0645": {
+           "initial": "\uFD94"
+         },
+         "\u0646\u062D\u0645": {
+           "initial": "\uFD95"
+         },
+         "\u0646\u062D\u0649": {
+           "final": "\uFD96"
+         },
+         "\u0646\u062C\u0645": {
+           "final": "\uFD97",
+           "initial": "\uFD98"
+         },
+         "\u0646\u062C\u0649": {
+           "final": "\uFD99"
+         },
+         "\u0646\u0645\u064A": {
+           "final": "\uFD9A"
+         },
+         "\u0646\u0645\u0649": {
+           "final": "\uFD9B"
+         },
+         "\u064A\u0645\u0645": {
+           "final": "\uFD9C",
+           "initial": "\uFD9D"
+         },
+         "\u0628\u062E\u064A": {
+           "final": "\uFD9E"
+         },
+         "\u062A\u062C\u064A": {
+           "final": "\uFD9F"
+         },
+         "\u062A\u062C\u0649": {
+           "final": "\uFDA0"
+         },
+         "\u062A\u062E\u064A": {
+           "final": "\uFDA1"
+         },
+         "\u062A\u062E\u0649": {
+           "final": "\uFDA2"
+         },
+         "\u062A\u0645\u064A": {
+           "final": "\uFDA3"
+         },
+         "\u062A\u0645\u0649": {
+           "final": "\uFDA4"
+         },
+         "\u062C\u0645\u064A": {
+           "final": "\uFDA5"
+         },
+         "\u062C\u062D\u0649": {
+           "final": "\uFDA6"
+         },
+         "\u062C\u0645\u0649": {
+           "final": "\uFDA7"
+         },
+         "\u0633\u062E\u0649": {
+           "final": "\uFDA8"
+         },
+         "\u0635\u062D\u064A": {
+           "final": "\uFDA9"
+         },
+         "\u0634\u062D\u064A": {
+           "final": "\uFDAA"
+         },
+         "\u0636\u062D\u064A": {
+           "final": "\uFDAB"
+         },
+         "\u0644\u062C\u064A": {
+           "final": "\uFDAC"
+         },
+         "\u0644\u0645\u064A": {
+           "final": "\uFDAD"
+         },
+         "\u064A\u062D\u064A": {
+           "final": "\uFDAE"
+         },
+         "\u064A\u062C\u064A": {
+           "final": "\uFDAF"
+         },
+         "\u064A\u0645\u064A": {
+           "final": "\uFDB0"
+         },
+         "\u0645\u0645\u064A": {
+           "final": "\uFDB1"
+         },
+         "\u0642\u0645\u064A": {
+           "final": "\uFDB2"
+         },
+         "\u0646\u062D\u064A": {
+           "final": "\uFDB3"
+         },
+         "\u0639\u0645\u064A": {
+           "final": "\uFDB6"
+         },
+         "\u0643\u0645\u064A": {
+           "final": "\uFDB7"
+         },
+         "\u0646\u062C\u062D": {
+           "initial": "\uFDB8",
+           "final": "\uFDBD"
+         },
+         "\u0645\u062E\u064A": {
+           "final": "\uFDB9"
+         },
+         "\u0644\u062C\u0645": {
+           "initial": "\uFDBA",
+           "final": "\uFDBC"
+         },
+         "\u0643\u0645\u0645": {
+           "final": "\uFDBB",
+           "initial": "\uFDC3"
+         },
+         "\u062C\u062D\u064A": {
+           "final": "\uFDBE"
+         },
+         "\u062D\u062C\u064A": {
+           "final": "\uFDBF"
+         },
+         "\u0645\u062C\u064A": {
+           "final": "\uFDC0"
+         },
+         "\u0641\u0645\u064A": {
+           "final": "\uFDC1"
+         },
+         "\u0628\u062D\u064A": {
+           "final": "\uFDC2"
+         },
+         "\u0633\u062E\u064A": {
+           "final": "\uFDC6"
+         },
+         "\u0646\u062C\u064A": {
+           "final": "\uFDC7"
+         },
+         "\u0644\u0622": {
+           "isolated": "\uFEF5",
+           "final": "\uFEF6"
+         },
+         "\u0644\u0623": {
+           "isolated": "\uFEF7",
+           "final": "\uFEF8"
+         },
+         "\u0644\u0625": {
+           "isolated": "\uFEF9",
+           "final": "\uFEFA"
+         },
+         "\u0644\u0627": {
+           "isolated": "\uFEFB",
+           "final": "\uFEFC"
+         },
+         "words": {
+           "\u0635\u0644\u06D2": "\uFDF0",
+           "\u0642\u0644\u06D2": "\uFDF1",
+           "\u0627\u0644\u0644\u0647": "\uFDF2",
+           "\u0627\u0643\u0628\u0631": "\uFDF3",
+           "\u0645\u062D\u0645\u062F": "\uFDF4",
+           "\u0635\u0644\u0639\u0645": "\uFDF5",
+           "\u0631\u0633\u0648\u0644": "\uFDF6",
+           "\u0639\u0644\u064A\u0647": "\uFDF7",
+           "\u0648\u0633\u0644\u0645": "\uFDF8",
+           "\u0635\u0644\u0649": "\uFDF9",
+           "\u0635\u0644\u0649\u0627\u0644\u0644\u0647\u0639\u0644\u064A\u0647\u0648\u0633\u0644\u0645": "\uFDFA",
+           "\u062C\u0644\u062C\u0644\u0627\u0644\u0647": "\uFDFB",
+           "\u0631\u06CC\u0627\u0644": "\uFDFC"
+         }
+       };
+
+       unicodeLigatures["default"] = ligatureReference;
+
+       Object.defineProperty(reference, "__esModule", {
+         value: true
+       });
+       var unicode_arabic_1$3 = unicodeArabic;
+       var unicode_ligatures_1$2 = unicodeLigatures;
+       var letterList = Object.keys(unicode_arabic_1$3["default"]);
+       reference.letterList = letterList;
+       var ligatureList = Object.keys(unicode_ligatures_1$2["default"]);
+       reference.ligatureList = ligatureList;
+       var ligatureWordList = Object.keys(unicode_ligatures_1$2["default"].words);
+       reference.ligatureWordList = ligatureWordList;
+       var lams = "\u0644\u06B5\u06B6\u06B7\u06B8";
+       reference.lams = lams;
+       var alefs = "\u0627\u0622\u0623\u0625\u0671\u0672\u0673\u0675\u0773\u0774";
+       reference.alefs = alefs; // for (var l = 1; l < lams.length; l++) {
+       //   console.log('-');
+       //   for (var a = 0; a < alefs.length; a++) {
+       //     console.log(a + ': ' + lams[l] + alefs[a]);
+       //   }
+       // }

 
 

-         // Index array by numeric index or specified key function.
-         else if (Array.isArray(object)) {
-           var i = -1,
-               n = object.length,
-               o;
+       var tashkeel = "\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8";
+       reference.tashkeel = tashkeel;

 
 

-           if (f == null) { while (++i < n) { map.set(i, object[i]); } }
-           else { while (++i < n) { map.set(f(o = object[i], i, object), o); } }
+       function addToTashkeel(start, finish) {
+         for (var i = start; i <= finish; i++) {
+           reference.tashkeel = tashkeel += String.fromCharCode(i);

          }
          }

-
-         // Convert object to map.
-         else if (object) { for (var key in object) { map.set(key, object[key]); } }
-
-         return map;

        }
 
        }
 

-       function Set$1() {}
-
-       var proto = map$2.prototype;
-
-       Set$1.prototype = set$2.prototype = {
-         constructor: Set$1,
-         has: proto.has,
-         add: function(value) {
-           value += "";
-           this[prefix + value] = value;
-           return this;
-         },
-         remove: proto.remove,
-         clear: proto.clear,
-         values: proto.keys,
-         size: proto.size,
-         empty: proto.empty,
-         each: proto.each
-       };
-
-       function set$2(object, f) {
-         var set = new Set$1;
-
-         // Copy constructor.
-         if (object instanceof Set$1) { object.each(function(value) { set.add(value); }); }
+       addToTashkeel(0x0610, 0x061A);
+       addToTashkeel(0x064B, 0x065F);
+       addToTashkeel(0x06D6, 0x06DC);
+       addToTashkeel(0x06E0, 0x06E4);
+       addToTashkeel(0x06EA, 0x06ED);
+       addToTashkeel(0x08D3, 0x08E1);
+       addToTashkeel(0x08E3, 0x08FF);
+       addToTashkeel(0xFE70, 0xFE7F);
+       var lineBreakers = "\u0627\u0629\u0648\u06C0\u06CF\u06FD\u06FE\u076B\u076C\u0771\u0773\u0774\u0778\u0779\u08E2\u08B1\u08B2\u08B9";
+       reference.lineBreakers = lineBreakers;

 
 

-         // Otherwise, assume it’s an array.
-         else if (object) {
-           var i = -1, n = object.length;
-           if (f == null) { while (++i < n) { set.add(object[i]); } }
-           else { while (++i < n) { set.add(f(object[i], i, object)); } }
+       function addToLineBreakers(start, finish) {
+         for (var i = start; i <= finish; i++) {
+           reference.lineBreakers = lineBreakers += String.fromCharCode(i);

          }
          }

-
-         return set;

        }
 
        }
 

-       var array$1 = Array.prototype;
+       addToLineBreakers(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored

 
 

-       var map$3 = array$1.map;
-       var slice$4 = array$1.slice;
+       addToLineBreakers(0x0621, 0x0625);
+       addToLineBreakers(0x062F, 0x0632);
+       addToLineBreakers(0x0660, 0x066D); // numerals, math

 
 

-       function constant$4(x) {
-         return function() {
-           return x;
-         };
-       }
+       addToLineBreakers(0x0671, 0x0677);
+       addToLineBreakers(0x0688, 0x0699);
+       addToLineBreakers(0x06C3, 0x06CB);
+       addToLineBreakers(0x06D2, 0x06F9);
+       addToLineBreakers(0x0759, 0x075B);
+       addToLineBreakers(0x08AA, 0x08AE);
+       addToLineBreakers(0xFB50, 0xFDFD); // presentation forms look like they could connect, but never do
+       // Presentation Forms A includes diacritics but they are meant to stand alone

 
 

-       function number$1(x) {
-         return +x;
-       }
+       addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
+       // numerals, math

 
 

-       var unit = [0, 1];
+       addToLineBreakers(0x10E60, 0x10E7F);
+       addToLineBreakers(0x1EC70, 0x1ECBF);
+       addToLineBreakers(0x1EE00, 0x1EEFF);

 
 

-       function identity$3(x) {
-         return x;
-       }
+       Object.defineProperty(GlyphSplitter$1, "__esModule", {
+         value: true
+       });
+       var isArabic_1$6 = isArabic$1;
+       var reference_1$5 = reference;

 
 

-       function normalize(a, b) {
-         return (b -= (a = +a))
-             ? function(x) { return (x - a) / b; }
-             : constant$4(isNaN(b) ? NaN : 0.5);
-       }
+       function GlyphSplitter(word) {
+         var letters = [];
+         var lastLetter = '';
+         word.split('').forEach(function (letter) {
+           if (isArabic_1$6.isArabic(letter)) {
+             if (reference_1$5.tashkeel.indexOf(letter) > -1) {
+               letters[letters.length - 1] += letter;
+             } else if (lastLetter.length && (reference_1$5.lams.indexOf(lastLetter) === 0 && reference_1$5.alefs.indexOf(letter) > -1 || reference_1$5.lams.indexOf(lastLetter) > 0 && reference_1$5.alefs.indexOf(letter) === 0)) {
+               // valid LA forms
+               letters[letters.length - 1] += letter;
+             } else {
+               letters.push(letter);
+             }
+           } else {
+             letters.push(letter);
+           }

 
 

-       function clamper(domain) {
-         var a = domain[0], b = domain[domain.length - 1], t;
-         if (a > b) { t = a, a = b, b = t; }
-         return function(x) { return Math.max(a, Math.min(b, x)); };
+           if (reference_1$5.tashkeel.indexOf(letter) === -1) {
+             lastLetter = letter;
+           }
+         });
+         return letters;

        }
 
        }
 

-       // normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
-       // interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
-       function bimap(domain, range, interpolate) {
-         var d0 = domain[0], d1 = domain[1], r0 = range[0], r1 = range[1];
-         if (d1 < d0) { d0 = normalize(d1, d0), r0 = interpolate(r1, r0); }
-         else { d0 = normalize(d0, d1), r0 = interpolate(r0, r1); }
-         return function(x) { return r0(d0(x)); };
-       }
+       GlyphSplitter$1.GlyphSplitter = GlyphSplitter;

 
 

-       function polymap(domain, range, interpolate) {
-         var j = Math.min(domain.length, range.length) - 1,
-             d = new Array(j),
-             r = new Array(j),
-             i = -1;
+       var BaselineSplitter$1 = {};

 
 

-         // Reverse descending domains.
-         if (domain[j] < domain[0]) {
-           domain = domain.slice().reverse();
-           range = range.slice().reverse();
-         }
+       Object.defineProperty(BaselineSplitter$1, "__esModule", {
+         value: true
+       });
+       var isArabic_1$5 = isArabic$1;
+       var reference_1$4 = reference;

 
 

-         while (++i < j) {
-           d[i] = normalize(domain[i], domain[i + 1]);
-           r[i] = interpolate(range[i], range[i + 1]);
-         }
+       function BaselineSplitter(word) {
+         var letters = [];
+         var lastLetter = '';
+         word.split('').forEach(function (letter) {
+           if (isArabic_1$5.isArabic(letter) && isArabic_1$5.isArabic(lastLetter)) {
+             if (lastLetter.length && reference_1$4.tashkeel.indexOf(letter) > -1) {
+               letters[letters.length - 1] += letter;
+             } else if (reference_1$4.lineBreakers.indexOf(lastLetter) > -1) {
+               letters.push(letter);
+             } else {
+               letters[letters.length - 1] += letter;
+             }
+           } else {
+             letters.push(letter);
+           }

 
 

-         return function(x) {
-           var i = bisectRight(domain, x, 1, j) - 1;
-           return r[i](d[i](x));
-         };
+           if (reference_1$4.tashkeel.indexOf(letter) === -1) {
+             // don't allow tashkeel to hide line break
+             lastLetter = letter;
+           }
+         });
+         return letters;

        }
 
        }
 

-       function copy$1(source, target) {
-         return target
-             .domain(source.domain())
-             .range(source.range())
-             .interpolate(source.interpolate())
-             .clamp(source.clamp())
-             .unknown(source.unknown());
-       }
+       BaselineSplitter$1.BaselineSplitter = BaselineSplitter;

 
 

-       function transformer$1() {
-         var domain = unit,
-             range = unit,
-             interpolate$1 = interpolate,
-             transform,
-             untransform,
-             unknown,
-             clamp = identity$3,
-             piecewise,
-             output,
-             input;
+       var Normalization = {};

 
 

-         function rescale() {
-           piecewise = Math.min(domain.length, range.length) > 2 ? polymap : bimap;
-           output = input = null;
-           return scale;
-         }
+       Object.defineProperty(Normalization, "__esModule", {
+         value: true
+       });
+       var unicode_arabic_1$2 = unicodeArabic;
+       var unicode_ligatures_1$1 = unicodeLigatures;
+       var isArabic_1$4 = isArabic$1;
+       var reference_1$3 = reference;

 
 

-         function scale(x) {
-           return isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate$1)))(transform(clamp(x)));
+       function Normal(word, breakPresentationForm) {
+         // default is to turn initial/isolated/medial/final presentation form to generic
+         if (typeof breakPresentationForm === 'undefined') {
+           breakPresentationForm = true;

          }
 
          }
 

-         scale.invert = function(y) {
-           return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
-         };
-
-         scale.domain = function(_) {
-           return arguments.length ? (domain = map$3.call(_, number$1), clamp === identity$3 || (clamp = clamper(domain)), rescale()) : domain.slice();
-         };
+         var returnable = '';
+         word.split('').forEach(function (letter) {
+           if (!isArabic_1$4.isArabic(letter)) {
+             returnable += letter;
+             return;
+           }

 
 

-         scale.range = function(_) {
-           return arguments.length ? (range = slice$4.call(_), rescale()) : range.slice();
-         };
+           for (var w = 0; w < reference_1$3.letterList.length; w++) {
+             // ok so we are checking this potential lettertron
+             var letterForms = unicode_arabic_1$2["default"][reference_1$3.letterList[w]];
+             var versions = Object.keys(letterForms);

 
 

-         scale.rangeRound = function(_) {
-           return range = slice$4.call(_), interpolate$1 = interpolateRound, rescale();
-         };
+             for (var v = 0; v < versions.length; v++) {
+               var localVersion = letterForms[versions[v]];

 
 

-         scale.clamp = function(_) {
-           return arguments.length ? (clamp = _ ? clamper(domain) : identity$3, scale) : clamp !== identity$3;
-         };
+               if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+                 // look at this embedded object
+                 var embeddedForms = Object.keys(localVersion);

 
 

-         scale.interpolate = function(_) {
-           return arguments.length ? (interpolate$1 = _, rescale()) : interpolate$1;
-         };
+                 for (var ef = 0; ef < embeddedForms.length; ef++) {
+                   var form = localVersion[embeddedForms[ef]];

 
 

-         scale.unknown = function(_) {
-           return arguments.length ? (unknown = _, scale) : unknown;
-         };
+                   if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+                     // match
+                     // console.log('embedded match');
+                     if (form === letter) {
+                       // match exact
+                       if (breakPresentationForm && localVersion['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(embeddedForms[ef]) > -1) {
+                         // replace presentation form
+                         // console.log('keeping normal form of the letter');
+                         if (_typeof(localVersion['normal']) === 'object') {
+                           returnable += localVersion['normal'][0];
+                         } else {
+                           returnable += localVersion['normal'];
+                         }

 
 

-         return function(t, u) {
-           transform = t, untransform = u;
-           return rescale();
-         };
-       }
+                         return;
+                       } // console.log('keeping this letter');

 
 

-       function continuous(transform, untransform) {
-         return transformer$1()(transform, untransform);
-       }

 
 

-       // Computes the decimal coefficient and exponent of the specified number x with
-       // significant digits p, where x is positive and p is in [1, 21] or undefined.
-       // For example, formatDecimal(1.23) returns ["123", 0].
-       function formatDecimal(x, p) {
-         if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) { return null; } // NaN, ±Infinity
-         var i, coefficient = x.slice(0, i);
+                       returnable += letter;
+                       return;
+                     } else if (_typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+                       // match
+                       returnable += form[0]; // console.log('added the first letter from the same array');

 
 

-         // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
-         // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
-         return [
-           coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient,
-           +x.slice(i + 1)
-         ];
-       }
+                       return;
+                     }
+                   }
+                 }
+               } else if (localVersion === letter) {
+                 // match exact
+                 if (breakPresentationForm && letterForms['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(versions[v]) > -1) {
+                   // replace presentation form
+                   // console.log('keeping normal form of the letter');
+                   if (_typeof(letterForms['normal']) === 'object') {
+                     returnable += letterForms['normal'][0];
+                   } else {
+                     returnable += letterForms['normal'];
+                   }

 
 

-       function exponent(x) {
-         return x = formatDecimal(Math.abs(x)), x ? x[1] : NaN;
-       }
+                   return;
+                 } // console.log('keeping this letter');

 
 

-       function formatGroup(grouping, thousands) {
-         return function(value, width) {
-           var i = value.length,
-               t = [],
-               j = 0,
-               g = grouping[0],
-               length = 0;

 
 

-           while (i > 0 && g > 0) {
-             if (length + g + 1 > width) { g = Math.max(1, width - length); }
-             t.push(value.substring(i -= g, i + g));
-             if ((length += g + 1) > width) { break; }
-             g = grouping[j = (j + 1) % grouping.length];
-           }
+                 returnable += letter;
+                 return;
+               } else if (_typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+                 // match
+                 returnable += localVersion[0]; // console.log('added the first letter from the same array');

 
 

-           return t.reverse().join(thousands);
-         };
-       }
+                 return;
+               }
+             }
+           } // try ligatures

 
 

-       function formatNumerals(numerals) {
-         return function(value) {
-           return value.replace(/[0-9]/g, function(i) {
-             return numerals[+i];
-           });
-         };
-       }

 
 

-       // [[fill]align][sign][symbol][0][width][,][.precision][~][type]
-       var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
+           for (var v2 = 0; v2 < reference_1$3.ligatureList.length; v2++) {
+             var normalForm = reference_1$3.ligatureList[v2];

 
 

-       function formatSpecifier(specifier) {
-         if (!(match = re.exec(specifier))) { throw new Error("invalid format: " + specifier); }
-         var match;
-         return new FormatSpecifier({
-           fill: match[1],
-           align: match[2],
-           sign: match[3],
-           symbol: match[4],
-           zero: match[5],
-           width: match[6],
-           comma: match[7],
-           precision: match[8] && match[8].slice(1),
-           trim: match[9],
-           type: match[10]
-         });
-       }
+             if (normalForm !== 'words') {
+               var ligForms = Object.keys(unicode_ligatures_1$1["default"][normalForm]);

 
 

-       formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
+               for (var f = 0; f < ligForms.length; f++) {
+                 if (unicode_ligatures_1$1["default"][normalForm][ligForms[f]] === letter) {
+                   returnable += normalForm;
+                   return;
+                 }
+               }
+             }
+           } // try words ligatures

 
 

-       function FormatSpecifier(specifier) {
-         this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
-         this.align = specifier.align === undefined ? ">" : specifier.align + "";
-         this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
-         this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
-         this.zero = !!specifier.zero;
-         this.width = specifier.width === undefined ? undefined : +specifier.width;
-         this.comma = !!specifier.comma;
-         this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
-         this.trim = !!specifier.trim;
-         this.type = specifier.type === undefined ? "" : specifier.type + "";
-       }

 
 

-       FormatSpecifier.prototype.toString = function() {
-         return this.fill
-             + this.align
-             + this.sign
-             + this.symbol
-             + (this.zero ? "0" : "")
-             + (this.width === undefined ? "" : Math.max(1, this.width | 0))
-             + (this.comma ? "," : "")
-             + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0))
-             + (this.trim ? "~" : "")
-             + this.type;
-       };
+           for (var v3 = 0; v3 < reference_1$3.ligatureWordList.length; v3++) {
+             var _normalForm = reference_1$3.ligatureWordList[v3];

 
 

-       // Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
-       function formatTrim(s) {
-         out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
-           switch (s[i]) {
-             case ".": i0 = i1 = i; break;
-             case "0": if (i0 === 0) { i0 = i; } i1 = i; break;
-             default: if (!+s[i]) { break out; } if (i0 > 0) { i0 = 0; } break;
+             if (unicode_ligatures_1$1["default"].words[_normalForm] === letter) {
+               returnable += _normalForm;
+               return;
+             }

            }
            }

-         }
-         return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
-       }
-
-       var prefixExponent;
-
-       function formatPrefixAuto(x, p) {
-         var d = formatDecimal(x, p);
-         if (!d) { return x + ""; }
-         var coefficient = d[0],
-             exponent = d[1],
-             i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
-             n = coefficient.length;
-         return i === n ? coefficient
-             : i > n ? coefficient + new Array(i - n + 1).join("0")
-             : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i)
-             : "0." + new Array(1 - i).join("0") + formatDecimal(x, Math.max(0, p + i - 1))[0]; // less than 1y!
-       }
-
-       function formatRounded(x, p) {
-         var d = formatDecimal(x, p);
-         if (!d) { return x + ""; }
-         var coefficient = d[0],
-             exponent = d[1];
-         return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient
-             : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1)
-             : coefficient + new Array(exponent - coefficient.length + 2).join("0");
-       }
-
-       var formatTypes = {
-         "%": function(x, p) { return (x * 100).toFixed(p); },
-         "b": function(x) { return Math.round(x).toString(2); },
-         "c": function(x) { return x + ""; },
-         "d": function(x) { return Math.round(x).toString(10); },
-         "e": function(x, p) { return x.toExponential(p); },
-         "f": function(x, p) { return x.toFixed(p); },
-         "g": function(x, p) { return x.toPrecision(p); },
-         "o": function(x) { return Math.round(x).toString(8); },
-         "p": function(x, p) { return formatRounded(x * 100, p); },
-         "r": formatRounded,
-         "s": formatPrefixAuto,
-         "X": function(x) { return Math.round(x).toString(16).toUpperCase(); },
-         "x": function(x) { return Math.round(x).toString(16); }
-       };

 
 

-       function identity$4(x) {
-         return x;
+           returnable += letter; // console.log('kept the letter')
+         });
+         return returnable;

        }
 
        }
 

-       var map$4 = Array.prototype.map,
-           prefixes = ["y","z","a","f","p","n","µ","m","","k","M","G","T","P","E","Z","Y"];
-
-       function formatLocale(locale) {
-         var group = locale.grouping === undefined || locale.thousands === undefined ? identity$4 : formatGroup(map$4.call(locale.grouping, Number), locale.thousands + ""),
-             currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
-             currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
-             decimal = locale.decimal === undefined ? "." : locale.decimal + "",
-             numerals = locale.numerals === undefined ? identity$4 : formatNumerals(map$4.call(locale.numerals, String)),
-             percent = locale.percent === undefined ? "%" : locale.percent + "",
-             minus = locale.minus === undefined ? "-" : locale.minus + "",
-             nan = locale.nan === undefined ? "NaN" : locale.nan + "";
-
-         function newFormat(specifier) {
-           specifier = formatSpecifier(specifier);
-
-           var fill = specifier.fill,
-               align = specifier.align,
-               sign = specifier.sign,
-               symbol = specifier.symbol,
-               zero = specifier.zero,
-               width = specifier.width,
-               comma = specifier.comma,
-               precision = specifier.precision,
-               trim = specifier.trim,
-               type = specifier.type;
-
-           // The "n" type is an alias for ",g".
-           if (type === "n") { comma = true, type = "g"; }
-
-           // The "" type, and any invalid type, is an alias for ".12~g".
-           else if (!formatTypes[type]) { precision === undefined && (precision = 12), trim = true, type = "g"; }
-
-           // If zero fill is specified, padding goes after sign and before digits.
-           if (zero || (fill === "0" && align === "=")) { zero = true, fill = "0", align = "="; }
-
-           // Compute the prefix and suffix.
-           // For SI-prefix, the suffix is lazily computed.
-           var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
-               suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : "";
-
-           // What format function should we use?
-           // Is this an integer type?
-           // Can this type generate exponential notation?
-           var formatType = formatTypes[type],
-               maybeSuffix = /[defgprs%]/.test(type);
-
-           // Set the default precision if not specified,
-           // or clamp the specified precision to the supported range.
-           // For significant precision, it must be in [1, 21].
-           // For fixed precision, it must be in [0, 20].
-           precision = precision === undefined ? 6
-               : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision))
-               : Math.max(0, Math.min(20, precision));
+       Normalization.Normal = Normal;

 
 

-           function format(value) {
-             var valuePrefix = prefix,
-                 valueSuffix = suffix,
-                 i, n, c;
+       var CharShaper$1 = {};

 
 

-             if (type === "c") {
-               valueSuffix = formatType(value) + valueSuffix;
-               value = "";
-             } else {
-               value = +value;
+       Object.defineProperty(CharShaper$1, "__esModule", {
+         value: true
+       });
+       var unicode_arabic_1$1 = unicodeArabic;
+       var isArabic_1$3 = isArabic$1;
+       var reference_1$2 = reference;

 
 

-               // Determine the sign. -0 is not less than 0, but 1 / -0 is!
-               var valueNegative = value < 0 || 1 / value < 0;
+       function CharShaper(letter, form) {
+         if (!isArabic_1$3.isArabic(letter)) {
+           // fail not Arabic
+           throw new Error('Not Arabic');
+         }

 
 

-               // Perform the initial formatting.
-               value = isNaN(value) ? nan : formatType(Math.abs(value), precision);
+         if (letter === "\u0621") {
+           // hamza alone
+           return "\u0621";
+         }

 
 

-               // Trim insignificant zeros.
-               if (trim) { value = formatTrim(value); }
+         for (var w = 0; w < reference_1$2.letterList.length; w++) {
+           // ok so we are checking this potential lettertron
+           var letterForms = unicode_arabic_1$1["default"][reference_1$2.letterList[w]];
+           var versions = Object.keys(letterForms);

 
 

-               // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
-               if (valueNegative && +value === 0 && sign !== "+") { valueNegative = false; }
+           for (var v = 0; v < versions.length; v++) {
+             var localVersion = letterForms[versions[v]];

 
 

-               // Compute the prefix and suffix.
-               valuePrefix = (valueNegative ? (sign === "(" ? sign : minus) : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
-               valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : "");
+             if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+               if (versions.indexOf(form) > -1) {
+                 return letterForms[form];
+               }
+             } else if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+               // check embedded
+               var embeddedVersions = Object.keys(localVersion);

 
 

-               // Break the formatted value into the integer “value” part that can be
-               // grouped, and fractional or exponential “suffix” part that is not.
-               if (maybeSuffix) {
-                 i = -1, n = value.length;
-                 while (++i < n) {
-                   if (c = value.charCodeAt(i), 48 > c || c > 57) {
-                     valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
-                     value = value.slice(0, i);
-                     break;
+               for (var ev = 0; ev < embeddedVersions.length; ev++) {
+                 if (localVersion[embeddedVersions[ev]] === letter || _typeof(localVersion[embeddedVersions[ev]]) === 'object' && localVersion[embeddedVersions[ev]].indexOf && localVersion[embeddedVersions[ev]].indexOf(letter) > -1) {
+                   if (embeddedVersions.indexOf(form) > -1) {
+                     return localVersion[form];

                    }
                  }
                }
              }
                    }
                  }
                }
              }

+           }
+         }
+       }

 
 

-             // If the fill character is not "0", grouping is applied before padding.
-             if (comma && !zero) { value = group(value, Infinity); }
+       CharShaper$1.CharShaper = CharShaper;

 
 

-             // Compute the padding.
-             var length = valuePrefix.length + value.length + valueSuffix.length,
-                 padding = length < width ? new Array(width - length + 1).join(fill) : "";
+       var WordShaper$2 = {};
+
+       Object.defineProperty(WordShaper$2, "__esModule", {
+         value: true
+       });
+       var isArabic_1$2 = isArabic$1;
+       var reference_1$1 = reference;
+       var CharShaper_1$1 = CharShaper$1;
+       var unicode_ligatures_1 = unicodeLigatures;
+
+       function WordShaper$1(word) {
+         var state = 'initial';
+         var output = '';

 
 

-             // If the fill character is "0", grouping is applied after padding.
-             if (comma && zero) { value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; }
+         for (var w = 0; w < word.length; w++) {
+           var nextLetter = ' ';

 
 

-             // Reconstruct the final output based on the desired alignment.
-             switch (align) {
-               case "<": value = valuePrefix + value + valueSuffix + padding; break;
-               case "=": value = valuePrefix + padding + value + valueSuffix; break;
-               case "^": value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length); break;
-               default: value = padding + valuePrefix + value + valueSuffix; break;
+           for (var nxw = w + 1; nxw < word.length; nxw++) {
+             if (!isArabic_1$2.isArabic(word[nxw])) {
+               break;

              }
 
              }
 

-             return numerals(value);
+             if (reference_1$1.tashkeel.indexOf(word[nxw]) === -1) {
+               nextLetter = word[nxw];
+               break;
+             }

            }
 
            }
 

-           format.toString = function() {
-             return specifier + "";
-           };
-
-           return format;
-         }
+           if (!isArabic_1$2.isArabic(word[w]) || isArabic_1$2.isMath(word[w])) {
+             // space or other non-Arabic
+             output += word[w];
+             state = 'initial';
+           } else if (reference_1$1.tashkeel.indexOf(word[w]) > -1) {
+             // tashkeel - add without changing state
+             output += word[w];
+           } else if (nextLetter === ' ' || // last Arabic letter in this word
+           reference_1$1.lineBreakers.indexOf(word[w]) > -1) {
+             // the current letter is known to break lines
+             output += CharShaper_1$1.CharShaper(word[w], state === 'initial' ? 'isolated' : 'final');
+             state = 'initial';
+           } else if (reference_1$1.lams.indexOf(word[w]) > -1 && reference_1$1.alefs.indexOf(nextLetter) > -1) {
+             // LA letters - advance an additional letter after this
+             output += unicode_ligatures_1["default"][word[w] + nextLetter][state === 'initial' ? 'isolated' : 'final'];
+
+             while (word[w] !== nextLetter) {
+               w++;
+             }

 
 

-         function formatPrefix(specifier, value) {
-           var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
-               e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
-               k = Math.pow(10, -e),
-               prefix = prefixes[8 + e / 3];
-           return function(value) {
-             return f(k * value) + prefix;
-           };
+             state = 'initial';
+           } else {
+             output += CharShaper_1$1.CharShaper(word[w], state);
+             state = 'medial';
+           }

          }
 
          }
 

-         return {
-           format: newFormat,
-           formatPrefix: formatPrefix
-         };
+         return output;

        }
 
        }
 

-       var locale;
-       var format;
-       var formatPrefix;
+       WordShaper$2.WordShaper = WordShaper$1;

 
 

-       defaultLocale({
-         decimal: ".",
-         thousands: ",",
-         grouping: [3],
-         currency: ["$", ""],
-         minus: "-"
+       var ParentLetter$1 = {};
+
+       Object.defineProperty(ParentLetter$1, "__esModule", {
+         value: true

        });
        });

+       var unicode_arabic_1 = unicodeArabic;
+       var isArabic_1$1 = isArabic$1;
+       var reference_1 = reference;

 
 

-       function defaultLocale(definition) {
-         locale = formatLocale(definition);
-         format = locale.format;
-         formatPrefix = locale.formatPrefix;
-         return locale;
-       }
+       function ParentLetter(letter) {
+         if (!isArabic_1$1.isArabic(letter)) {
+           throw new Error('Not an Arabic letter');
+         }

 
 

-       function precisionFixed(step) {
-         return Math.max(0, -exponent(Math.abs(step)));
-       }
+         for (var w = 0; w < reference_1.letterList.length; w++) {
+           // ok so we are checking this potential lettertron
+           var letterForms = unicode_arabic_1["default"][reference_1.letterList[w]];
+           var versions = Object.keys(letterForms);

 
 

-       function precisionPrefix(step, value) {
-         return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
-       }
+           for (var v = 0; v < versions.length; v++) {
+             var localVersion = letterForms[versions[v]];

 
 

-       function precisionRound(step, max) {
-         step = Math.abs(step), max = Math.abs(max) - step;
-         return Math.max(0, exponent(max) - exponent(step)) + 1;
-       }
+             if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+               // look at this embedded object
+               var embeddedForms = Object.keys(localVersion);

 
 

-       function tickFormat(start, stop, count, specifier) {
-         var step = tickStep(start, stop, count),
-             precision;
-         specifier = formatSpecifier(specifier == null ? ",f" : specifier);
-         switch (specifier.type) {
-           case "s": {
-             var value = Math.max(Math.abs(start), Math.abs(stop));
-             if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) { specifier.precision = precision; }
-             return formatPrefix(specifier, value);
-           }
-           case "":
-           case "e":
-           case "g":
-           case "p":
-           case "r": {
-             if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) { specifier.precision = precision - (specifier.type === "e"); }
-             break;
-           }
-           case "f":
-           case "%": {
-             if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) { specifier.precision = precision - (specifier.type === "%") * 2; }
-             break;
+               for (var ef = 0; ef < embeddedForms.length; ef++) {
+                 var form = localVersion[embeddedForms[ef]];
+
+                 if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+                   // match
+                   return localVersion;
+                 }
+               }
+             } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+               // match
+               return letterForms;
+             }

            }
            }

+
+           return null;

          }
          }

-         return format(specifier);

        }
 
        }
 

-       function linearish(scale) {
-         var domain = scale.domain;
+       ParentLetter$1.ParentLetter = ParentLetter;

 
 

-         scale.ticks = function(count) {
-           var d = domain();
-           return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
-         };
+       function GrandparentLetter(letter) {
+         if (!isArabic_1$1.isArabic(letter)) {
+           throw new Error('Not an Arabic letter');
+         }

 
 

-         scale.tickFormat = function(count, specifier) {
-           var d = domain();
-           return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
-         };
+         for (var w = 0; w < reference_1.letterList.length; w++) {
+           // ok so we are checking this potential lettertron
+           var letterForms = unicode_arabic_1["default"][reference_1.letterList[w]];
+           var versions = Object.keys(letterForms);

 
 

-         scale.nice = function(count) {
-           if (count == null) { count = 10; }
+           for (var v = 0; v < versions.length; v++) {
+             var localVersion = letterForms[versions[v]];

 
 

-           var d = domain(),
-               i0 = 0,
-               i1 = d.length - 1,
-               start = d[i0],
-               stop = d[i1],
-               step;
+             if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+               // look at this embedded object
+               var embeddedForms = Object.keys(localVersion);

 
 

-           if (stop < start) {
-             step = start, start = stop, stop = step;
-             step = i0, i0 = i1, i1 = step;
+               for (var ef = 0; ef < embeddedForms.length; ef++) {
+                 var form = localVersion[embeddedForms[ef]];
+
+                 if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+                   // match
+                   return letterForms;
+                 }
+               }
+             } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+               // match
+               return letterForms;
+             }

            }
 
            }
 

-           step = tickIncrement(start, stop, count);
+           return null;
+         }
+       }

 
 

-           if (step > 0) {
-             start = Math.floor(start / step) * step;
-             stop = Math.ceil(stop / step) * step;
-             step = tickIncrement(start, stop, count);
-           } else if (step < 0) {
-             start = Math.ceil(start * step) / step;
-             stop = Math.floor(stop * step) / step;
-             step = tickIncrement(start, stop, count);
-           }
+       ParentLetter$1.GrandparentLetter = GrandparentLetter;

 
 

-           if (step > 0) {
-             d[i0] = Math.floor(start / step) * step;
-             d[i1] = Math.ceil(stop / step) * step;
-             domain(d);
-           } else if (step < 0) {
-             d[i0] = Math.ceil(start * step) / step;
-             d[i1] = Math.floor(stop * step) / step;
-             domain(d);
-           }
+       Object.defineProperty(lib, "__esModule", {
+         value: true
+       });
+       var isArabic_1 = isArabic$1;
+       lib.isArabic = isArabic_1.isArabic;
+       var GlyphSplitter_1 = GlyphSplitter$1;
+       lib.GlyphSplitter = GlyphSplitter_1.GlyphSplitter;
+       var BaselineSplitter_1 = BaselineSplitter$1;
+       lib.BaselineSplitter = BaselineSplitter_1.BaselineSplitter;
+       var Normalization_1 = Normalization;
+       lib.Normal = Normalization_1.Normal;
+       var CharShaper_1 = CharShaper$1;
+       lib.CharShaper = CharShaper_1.CharShaper;
+       var WordShaper_1 = WordShaper$2;
+       var WordShaper = lib.WordShaper = WordShaper_1.WordShaper;
+       var ParentLetter_1 = ParentLetter$1;
+       lib.ParentLetter = ParentLetter_1.ParentLetter;
+       lib.GrandparentLetter = ParentLetter_1.GrandparentLetter;

 
 

-           return scale;
-         };
+       var rtlRegex = /[\u0590-\u05FF\u0600-\u06FF\u0750-\u07BF\u08A0–\u08BF]/;
+       function fixRTLTextForSvg(inputText) {
+         var ret = '',
+             rtlBuffer = [];
+         var arabicRegex = /[\u0600-\u06FF]/g;
+         var arabicDiacritics = /[\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06ED]/g;
+         var arabicMath = /[\u0660-\u066C\u06F0-\u06F9]+/g;
+         var thaanaVowel = /[\u07A6-\u07B0]/;
+         var hebrewSign = /[\u0591-\u05bd\u05bf\u05c1-\u05c5\u05c7]/; // Arabic word shaping

 
 

-         return scale;
-       }
+         if (arabicRegex.test(inputText)) {
+           inputText = WordShaper(inputText);
+         }

 
 

-       function linear$2() {
-         var scale = continuous(identity$3, identity$3);
+         for (var n = 0; n < inputText.length; n++) {
+           var c = inputText[n];

 
 

-         scale.copy = function() {
-           return copy$1(scale, linear$2());
-         };
+           if (arabicMath.test(c)) {
+             // Arabic numbers go LTR
+             ret += rtlBuffer.reverse().join('');
+             rtlBuffer = [c];
+           } else {
+             if (rtlBuffer.length && arabicMath.test(rtlBuffer[rtlBuffer.length - 1])) {
+               ret += rtlBuffer.reverse().join('');
+               rtlBuffer = [];
+             }

 
 

-         initRange.apply(scale, arguments);
+             if ((thaanaVowel.test(c) || hebrewSign.test(c) || arabicDiacritics.test(c)) && rtlBuffer.length) {
+               rtlBuffer[rtlBuffer.length - 1] += c;
+             } else if (rtlRegex.test(c) // include Arabic presentation forms
+             || c.charCodeAt(0) >= 64336 && c.charCodeAt(0) <= 65023 || c.charCodeAt(0) >= 65136 && c.charCodeAt(0) <= 65279) {
+               rtlBuffer.push(c);
+             } else if (c === ' ' && rtlBuffer.length) {
+               // whitespace within RTL text
+               rtlBuffer = [rtlBuffer.reverse().join('') + ' '];
+             } else {
+               // non-RTL character
+               ret += rtlBuffer.reverse().join('') + c;
+               rtlBuffer = [];
+             }
+           }
+         }

 
 

-         return linearish(scale);
+         ret += rtlBuffer.reverse().join('');
+         return ret;

        }
 
        }
 

-       function quantize() {
-         var x0 = 0,
-             x1 = 1,
-             n = 1,
-             domain = [0.5],
-             range = [0, 1],
-             unknown;
+       var DESCRIPTORS$1 = descriptors;
+       var objectKeys = objectKeys$4;
+       var toIndexedObject = toIndexedObject$b;
+       var propertyIsEnumerable = objectPropertyIsEnumerable.f;

 
 

-         function scale(x) {
-           return x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
-         }
+       // `Object.{ entries, values }` methods implementation
+       var createMethod$1 = function (TO_ENTRIES) {
+         return function (it) {
+           var O = toIndexedObject(it);
+           var keys = objectKeys(O);
+           var length = keys.length;
+           var i = 0;
+           var result = [];
+           var key;
+           while (length > i) {
+             key = keys[i++];
+             if (!DESCRIPTORS$1 || propertyIsEnumerable.call(O, key)) {
+               result.push(TO_ENTRIES ? [key, O[key]] : O[key]);
+             }
+           }
+           return result;
+         };
+       };

 
 

-         function rescale() {
-           var i = -1;
-           domain = new Array(n);
-           while (++i < n) { domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1); }
-           return scale;
-         }
+       var objectToArray = {
+         // `Object.entries` method
+         // https://tc39.es/ecma262/#sec-object.entries
+         entries: createMethod$1(true),
+         // `Object.values` method
+         // https://tc39.es/ecma262/#sec-object.values
+         values: createMethod$1(false)
+       };

 
 

-         scale.domain = function(_) {
-           return arguments.length ? (x0 = +_[0], x1 = +_[1], rescale()) : [x0, x1];
-         };
+       var $$k = _export;
+       var $values = objectToArray.values;

 
 

-         scale.range = function(_) {
-           return arguments.length ? (n = (range = slice$4.call(_)).length - 1, rescale()) : range.slice();
-         };
+       // `Object.values` method
+       // https://tc39.es/ecma262/#sec-object.values
+       $$k({ target: 'Object', stat: true }, {
+         values: function values(O) {
+           return $values(O);
+         }
+       });

 
 

-         scale.invertExtent = function(y) {
-           var i = range.indexOf(y);
-           return i < 0 ? [NaN, NaN]
-               : i < 1 ? [x0, domain[0]]
-               : i >= n ? [domain[n - 1], x1]
-               : [domain[i - 1], domain[i]];
-         };
+       // https://github.com/openstreetmap/iD/issues/772
+       // http://mathiasbynens.be/notes/localstorage-pattern#comment-9
+       var _storage;

 
 

-         scale.unknown = function(_) {
-           return arguments.length ? (unknown = _, scale) : scale;
-         };
+       try {
+         _storage = localStorage;
+       } catch (e) {} // eslint-disable-line no-empty

 
 

-         scale.thresholds = function() {
-           return domain.slice();
-         };

 
 

-         scale.copy = function() {
-           return quantize()
-               .domain([x0, x1])
-               .range(range)
-               .unknown(unknown);
+       _storage = _storage || function () {
+         var s = {};
+         return {
+           getItem: function getItem(k) {
+             return s[k];
+           },
+           setItem: function setItem(k, v) {
+             return s[k] = v;
+           },
+           removeItem: function removeItem(k) {
+             return delete s[k];
+           }

          };
          };

+       }(); //
+       // corePreferences is an interface for persisting basic key-value strings
+       // within and between iD sessions on the same site.
+       //

 
 

-         return initRange.apply(linearish(scale), arguments);
-       }
+       /**
+        * @param {string} k
+        * @param {string?} v
+        * @returns {boolean} true if the action succeeded
+        */

 
 

-       function behaviorBreathe() {
-           var duration = 800;
-           var steps = 4;
-           var selector = '.selected.shadow, .selected .shadow';
-           var _selected = select(null);
-           var _classed = '';
-           var _params = {};
-           var _done = false;
-           var _timer;
-
-
-           function ratchetyInterpolator(a, b, steps, units) {
-               a = parseFloat(a);
-               b = parseFloat(b);
-               var sample = quantize()
-                   .domain([0, 1])
-                   .range(d3_quantize(d3_interpolateNumber(a, b), steps));
-
-               return function(t) {
-                   return String(sample(t)) + (units || '');
-               };
+
+       function corePreferences(k, v) {
+         try {
+           if (arguments.length === 1) return _storage.getItem(k);else if (v === null) _storage.removeItem(k);else _storage.setItem(k, v);
+           return true;
+         } catch (e) {
+           /* eslint-disable no-console */
+           if (typeof console !== 'undefined') {
+             console.error('localStorage quota exceeded');

            }
            }

+           /* eslint-enable no-console */

 
 
 
 

-           function reset(selection) {
-               selection
-                   .style('stroke-opacity', null)
-                   .style('stroke-width', null)
-                   .style('fill-opacity', null)
-                   .style('r', null);
-           }
+           return false;
+         }
+       }

 
 

+       var vparse = {exports: {}};

 
 

-           function setAnimationParams(transition, fromTo) {
-               var toFrom = (fromTo === 'from' ? 'to' : 'from');
+       (function (module) {
+         (function (window) {

 
 

-               transition
-                   .styleTween('stroke-opacity', function(d) {
-                       return ratchetyInterpolator(
-                           _params[d.id][toFrom].opacity,
-                           _params[d.id][fromTo].opacity,
-                           steps
-                       );
-                   })
-                   .styleTween('stroke-width', function(d) {
-                       return ratchetyInterpolator(
-                           _params[d.id][toFrom].width,
-                           _params[d.id][fromTo].width,
-                           steps,
-                           'px'
-                       );
-                   })
-                   .styleTween('fill-opacity', function(d) {
-                       return ratchetyInterpolator(
-                           _params[d.id][toFrom].opacity,
-                           _params[d.id][fromTo].opacity,
-                           steps
-                       );
-                   })
-                   .styleTween('r', function(d) {
-                       return ratchetyInterpolator(
-                           _params[d.id][toFrom].width,
-                           _params[d.id][fromTo].width,
-                           steps,
-                           'px'
-                       );
-                   });
+           function parseVersion(v) {
+             var m = v.replace(/[^0-9.]/g, '').match(/[0-9]*\.|[0-9]+/g) || [];
+             v = {
+               major: +m[0] || 0,
+               minor: +m[1] || 0,
+               patch: +m[2] || 0,
+               build: +m[3] || 0
+             };
+             v.isEmpty = !v.major && !v.minor && !v.patch && !v.build;
+             v.parsed = [v.major, v.minor, v.patch, v.build];
+             v.text = v.parsed.join('.');
+             v.compare = compare;
+             return v;

            }
 
            }
 

+           function compare(v) {
+             if (typeof v === 'string') {
+               v = parseVersion(v);
+             }

 
 

-           function calcAnimationParams(selection) {
-               selection
-                   .call(reset)
-                   .each(function(d) {
-                       var s = select(this);
-                       var tag = s.node().tagName;
-                       var p = {'from': {}, 'to': {}};
-                       var opacity;
-                       var width;
-
-                       // determine base opacity and width
-                       if (tag === 'circle') {
-                           opacity = parseFloat(s.style('fill-opacity') || 0.5);
-                           width = parseFloat(s.style('r') || 15.5);
-                       } else {
-                           opacity = parseFloat(s.style('stroke-opacity') || 0.7);
-                           width = parseFloat(s.style('stroke-width') || 10);
-                       }
+             for (var i = 0; i < 4; i++) {
+               if (this.parsed[i] !== v.parsed[i]) {
+                 return this.parsed[i] > v.parsed[i] ? 1 : -1;
+               }
+             }

 
 

-                       // calculate from/to interpolation params..
-                       p.tag = tag;
-                       p.from.opacity = opacity * 0.6;
-                       p.to.opacity = opacity * 1.25;
-                       p.from.width = width * 0.7;
-                       p.to.width = width * (tag === 'circle' ? 1.5 : 1);
-                       _params[d.id] = p;
-                   });
+             return 0;

            }
            }

+           /* istanbul ignore next */

 
 
 
 

-           function run(surface, fromTo) {
-               var toFrom = (fromTo === 'from' ? 'to' : 'from');
-               var currSelected = surface.selectAll(selector);
-               var currClassed = surface.attr('class');
+           if (module && 'object' === 'object') {
+             module.exports = parseVersion;
+           } else {
+             window.parseVersion = parseVersion;
+           }
+         })(commonjsGlobal);
+       })(vparse);
+
+       var parseVersion = vparse.exports;
+
+       var name = "iD";
+       var version = "2.20.2";
+       var description = "A friendly editor for OpenStreetMap";
+       var main = "dist/iD.min.js";
+       var repository = "github:openstreetmap/iD";
+       var homepage = "https://github.com/openstreetmap/iD";
+       var bugs = "https://github.com/openstreetmap/iD/issues";
+       var keywords = ["editor","openstreetmap"];
+       var license = "ISC";
+       var scripts = {all:"npm-run-all -s clean build build:legacy dist",build:"npm-run-all -s build:css build:data build:dev","build:css":"node scripts/build_css.js","build:data":"shx mkdir -p dist/data && node scripts/build_data.js","build:dev":"rollup --config config/rollup.config.dev.js","build:legacy":"rollup --config config/rollup.config.legacy.js","build:stats":"rollup --config config/rollup.config.stats.js",clean:"shx rm -f dist/*.js dist/*.map dist/*.css dist/img/*.svg",dist:"npm-run-all -p dist:**","dist:mapillary":"shx mkdir -p dist/mapillary-js && shx cp -R node_modules/mapillary-js/dist/* dist/mapillary-js/","dist:pannellum":"shx mkdir -p dist/pannellum-streetside && shx cp -R node_modules/pannellum/build/* dist/pannellum-streetside/","dist:min:iD":"uglifyjs dist/iD.legacy.js --compress --mangle --output dist/iD.min.js","dist:svg:iD":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"iD-%s\" --symbol-sprite dist/img/iD-sprite.svg \"svg/iD-sprite/**/*.svg\"","dist:svg:community":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"community-%s\" --symbol-sprite dist/img/community-sprite.svg node_modules/osm-community-index/dist/img/*.svg","dist:svg:fa":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/fa-sprite.svg svg/fontawesome/*.svg","dist:svg:maki":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"maki-%s\" --symbol-sprite dist/img/maki-sprite.svg node_modules/@mapbox/maki/icons/*.svg","dist:svg:mapillary:signs":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/mapillary-sprite.svg node_modules/mapillary_sprite_source/package_signs/*.svg","dist:svg:mapillary:objects":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/mapillary-object-sprite.svg node_modules/mapillary_sprite_source/package_objects/*.svg","dist:svg:temaki":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"temaki-%s\" --symbol-sprite dist/img/temaki-sprite.svg node_modules/@ideditor/temaki/icons/*.svg",imagery:"node scripts/update_imagery.js",lint:"eslint scripts test/spec modules","lint:fix":"eslint scripts test/spec modules --fix",start:"npm-run-all -s build start:server",quickstart:"npm-run-all -s build:dev start:server","start:server":"node scripts/server.js",test:"npm-run-all -s lint build:css build:data build:legacy test:spec","test:spec":"phantomjs --web-security=no node_modules/mocha-phantomjs-core/mocha-phantomjs-core.js test/index.html spec",translations:"node scripts/update_locales.js"};
+       var dependencies = {"@ideditor/country-coder":"~5.0.3","@ideditor/location-conflation":"~1.0.2","@mapbox/geojson-area":"^0.2.2","@mapbox/sexagesimal":"1.2.0","@mapbox/vector-tile":"^1.3.1","@tmcw/togeojson":"^4.5.0","@turf/bbox-clip":"^6.0.0","abortcontroller-polyfill":"^1.4.0","aes-js":"^3.1.2","alif-toolkit":"^1.2.9","core-js":"^3.6.5",diacritics:"1.3.0","fast-deep-equal":"~3.1.1","fast-json-stable-stringify":"2.1.0","lodash-es":"~4.17.15",marked:"~2.0.0","node-diff3":"2.1.0","osm-auth":"1.1.0",pannellum:"2.5.6",pbf:"^3.2.1","polygon-clipping":"~0.15.1",rbush:"3.0.1","whatwg-fetch":"^3.4.1","which-polygon":"2.2.0"};
+       var devDependencies = {"@babel/core":"^7.11.6","@babel/preset-env":"^7.11.5","@fortawesome/fontawesome-svg-core":"^1.2.32","@fortawesome/free-brands-svg-icons":"~5.15.1","@fortawesome/free-regular-svg-icons":"~5.15.1","@fortawesome/free-solid-svg-icons":"~5.15.1","@ideditor/temaki":"~4.4.0","@mapbox/maki":"^6.0.0","@rollup/plugin-babel":"^5.2.1","@rollup/plugin-commonjs":"^21.0.0","@rollup/plugin-json":"^4.0.1","@rollup/plugin-node-resolve":"~13.0.5",autoprefixer:"^10.0.1",btoa:"^1.2.1",chai:"^4.1.0","cldr-core":"37.0.0","cldr-localenames-full":"37.0.0",colors:"^1.1.2","concat-files":"^0.1.1",d3:"~6.6.0","editor-layer-index":"github:osmlab/editor-layer-index#gh-pages",eslint:"^7.1.0",gaze:"^1.1.3",glob:"^7.1.0",happen:"^0.3.1","js-yaml":"^4.0.0","json-stringify-pretty-compact":"^3.0.0",mapillary_sprite_source:"^1.8.0","mapillary-js":"4.0.0",minimist:"^1.2.3",mocha:"^7.0.1","mocha-phantomjs-core":"^2.1.0","name-suggestion-index":"~6.0","node-fetch":"^2.6.1","npm-run-all":"^4.0.0","object-inspect":"1.10.3","osm-community-index":"~5.1.0","phantomjs-prebuilt":"~2.1.16",postcss:"^8.1.1","postcss-selector-prepend":"^0.5.0",rollup:"~2.52.8","rollup-plugin-includepaths":"~0.2.3","rollup-plugin-progress":"^1.1.1","rollup-plugin-visualizer":"~4.2.0",shelljs:"^0.8.0",shx:"^0.3.0",sinon:"7.5.0","sinon-chai":"^3.3.0",smash:"0.0","static-server":"^2.2.1","svg-sprite":"1.5.1","uglify-js":"~3.13.0",vparse:"~1.1.0"};
+       var engines = {node:">=10"};
+       var browserslist = ["> 0.2%, last 6 major versions, Firefox ESR, IE 11, maintained node versions"];
+       var packageJSON = {
+       name: name,
+       version: version,
+       description: description,
+       main: main,
+       repository: repository,
+       homepage: homepage,
+       bugs: bugs,
+       keywords: keywords,
+       license: license,
+       scripts: scripts,
+       dependencies: dependencies,
+       devDependencies: devDependencies,
+       engines: engines,
+       browserslist: browserslist
+       };

 
 

-               if (_done || currSelected.empty()) {
-                   _selected.call(reset);
-                   _selected = select(null);
-                   return;
-               }
+       var _mainFileFetcher = coreFileFetcher(); // singleton
+       // coreFileFetcher asynchronously fetches data from JSON files
+       //

 
 

-               if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
-                   _selected.call(reset);
-                   _classed = currClassed;
-                   _selected = currSelected.call(calcAnimationParams);
-               }
+       function coreFileFetcher() {
+         var ociVersion = packageJSON.devDependencies['osm-community-index'];
+         var v = parseVersion(ociVersion);
+         var vMinor = "".concat(v.major, ".").concat(v.minor);
+         var _this = {};
+         var _inflight = {};
+         var _fileMap = {
+           'address_formats': 'data/address_formats.min.json',
+           'deprecated': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/deprecated.min.json',
+           'discarded': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/discarded.min.json',
+           'imagery': 'data/imagery.min.json',
+           'intro_graph': 'data/intro_graph.min.json',
+           'keepRight': 'data/keepRight.min.json',
+           'languages': 'data/languages.min.json',
+           'locales': 'locales/index.min.json',
+           'oci_defaults': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/defaults.min.json"),
+           'oci_features': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/featureCollection.min.json"),
+           'oci_resources': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/resources.min.json"),
+           'preset_categories': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/preset_categories.min.json',
+           'preset_defaults': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/preset_defaults.min.json',
+           'preset_fields': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/fields.min.json',
+           'preset_presets': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/presets.min.json',
+           'phone_formats': 'data/phone_formats.min.json',
+           'qa_data': 'data/qa_data.min.json',
+           'shortcuts': 'data/shortcuts.min.json',
+           'territory_languages': 'data/territory_languages.min.json',
+           'wmf_sitematrix': 'https://cdn.jsdelivr.net/npm/wmf-sitematrix@0.1/wikipedia.min.json'
+         };
+         var _cachedData = {}; // expose the cache; useful for tests

 
 

-               var didCallNextRun = false;
+         _this.cache = function () {
+           return _cachedData;
+         }; // Returns a Promise to fetch data
+         // (resolved with the data if we have it already)

 
 

-               _selected
-                   .transition()
-                   .duration(duration)
-                   .call(setAnimationParams, fromTo)
-                   .on('end', function() {
-                       // `end` event is called for each selected element, but we want
-                       // it to run only once
-                       if (!didCallNextRun) {
-                           surface.call(run, toFrom);
-                           didCallNextRun = true;
-                       }

 
 

-                       // if entity was deselected, remove breathe styling
-                       if (!select(this).classed('selected')) {
-                           reset(select(this));
-                       }
-                   });
+         _this.get = function (which) {
+           if (_cachedData[which]) {
+             return Promise.resolve(_cachedData[which]);

            }
 
            }
 

-           function behavior(surface) {
-               _done = false;
-               _timer = timer(function() {
-                   // wait for elements to actually become selected
-                   if (surface.selectAll(selector).empty()) {
-                       return false;
-                   }
+           var file = _fileMap[which];

 
 

-                   surface.call(run, 'from');
-                   _timer.stop();
-                   return true;
-               }, 20);
+           var url = file && _this.asset(file);
+
+           if (!url) {
+             return Promise.reject("Unknown data file for \"".concat(which, "\""));

            }
 
            }
 

-           behavior.restartIfNeeded = function(surface) {
-               if (_selected.empty()) {
-                   surface.call(run, 'from');
-                   if (_timer) {
-                       _timer.stop();
-                   }
-               }
-           };
+           var prom = _inflight[url];

 
 

-           behavior.off = function() {
-               _done = true;
-               if (_timer) {
-                   _timer.stop();
+           if (!prom) {
+             _inflight[url] = prom = fetch(url).then(function (response) {
+               // fetch in PhantomJS tests may return ok=false and status=0 even if it's okay
+               if (!response.ok && response.status !== 0 || !response.json) {
+                 throw new Error(response.status + ' ' + response.statusText);

                }
                }

-               _selected
-                   .interrupt()
-                   .call(reset);
-           };

 
 

+               if (response.status === 204 || response.status === 205) return; // No Content, Reset Content

 
 

-           return behavior;
-       }
+               return response.json();
+             }).then(function (result) {
+               delete _inflight[url];

 
 

-       /* Creates a keybinding behavior for an operation */
-       function behaviorOperation(context) {
-           var _operation;
+               if (!result) {
+                 throw new Error("No data loaded for \"".concat(which, "\""));
+               }

 
 

-           function keypress() {
-               // prevent operations during low zoom selection
-               if (!context.map().withinEditableZoom()) { return; }
+               _cachedData[which] = result;
+               return result;
+             })["catch"](function (err) {
+               delete _inflight[url];
+               throw err;
+             });
+           }

 
 

-               event.preventDefault();
-               var disabled = _operation.disabled();
+           return prom;
+         }; // Accessor for the file map

 
 

-               if (disabled) {
-                   context.ui().flash
-                       .duration(4000)
-                       .iconName('#iD-operation-' + _operation.id)
-                       .iconClass('operation disabled')
-                       .text(_operation.tooltip)();

 
 

-               } else {
-                   context.ui().flash
-                       .duration(2000)
-                       .iconName('#iD-operation-' + _operation.id)
-                       .iconClass('operation')
-                       .text(_operation.annotation() || _operation.title)();
+         _this.fileMap = function (val) {
+           if (!arguments.length) return _fileMap;
+           _fileMap = val;
+           return _this;
+         };

 
 

-                   if (_operation.point) { _operation.point(null); }
-                   _operation();
-               }
-           }
+         var _assetPath = '';

 
 

+         _this.assetPath = function (val) {
+           if (!arguments.length) return _assetPath;
+           _assetPath = val;
+           return _this;
+         };

 
 

-           function behavior() {
-               if (_operation && _operation.available()) {
-                   context.keybinding()
-                       .on(_operation.keys, keypress);
-               }
+         var _assetMap = {};

 
 

-               return behavior;
-           }
+         _this.assetMap = function (val) {
+           if (!arguments.length) return _assetMap;
+           _assetMap = val;
+           return _this;
+         };

 
 

+         _this.asset = function (val) {
+           if (/^http(s)?:\/\//i.test(val)) return val;
+           var filename = _assetPath + val;
+           return _assetMap[filename] || filename;
+         };

 
 

-           behavior.off = function() {
-               context.keybinding()
-                   .off(_operation.keys);
-           };
+         return _this;
+       }

 
 

+       var classof = classofRaw$1;

 
 

-           behavior.which = function (_) {
-               if (!arguments.length) { return _operation; }
-               _operation = _;
-               return behavior;
-           };
+       // `thisNumberValue` abstract operation
+       // https://tc39.es/ecma262/#sec-thisnumbervalue
+       var thisNumberValue$2 = function (value) {
+         if (typeof value != 'number' && classof(value) != 'Number') {
+           throw TypeError('Incorrect invocation');
+         }
+         return +value;
+       };

 
 

+       var toInteger$1 = toInteger$b;
+       var requireObjectCoercible$6 = requireObjectCoercible$e;

 
 

-           return behavior;
-       }
+       // `String.prototype.repeat` method implementation
+       // https://tc39.es/ecma262/#sec-string.prototype.repeat
+       var stringRepeat = function repeat(count) {
+         var str = String(requireObjectCoercible$6(this));
+         var result = '';
+         var n = toInteger$1(count);
+         if (n < 0 || n == Infinity) throw RangeError('Wrong number of repetitions');
+         for (;n > 0; (n >>>= 1) && (str += str)) if (n & 1) result += str;
+         return result;
+       };

 
 

-       function operationCircularize(context, selectedIDs) {
-           var _extent;
-           var _actions = selectedIDs.map(getAction).filter(Boolean);
-           var _amount = _actions.length === 1 ? 'single' : 'multiple';
-           var _coords = utilGetAllNodes(selectedIDs, context.graph())
-               .map(function(n) { return n.loc; });
+       var $$j = _export;
+       var toInteger = toInteger$b;
+       var thisNumberValue$1 = thisNumberValue$2;
+       var repeat$2 = stringRepeat;
+       var fails$7 = fails$N;

 
 

-           function getAction(entityID) {
+       var nativeToFixed = 1.0.toFixed;
+       var floor = Math.floor;

 
 

-               var entity = context.entity(entityID);
+       var pow = function (x, n, acc) {
+         return n === 0 ? acc : n % 2 === 1 ? pow(x, n - 1, acc * x) : pow(x * x, n / 2, acc);
+       };

 
 

-               if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) { return null; }
+       var log = function (x) {
+         var n = 0;
+         var x2 = x;
+         while (x2 >= 4096) {
+           n += 12;
+           x2 /= 4096;
+         }
+         while (x2 >= 2) {
+           n += 1;
+           x2 /= 2;
+         } return n;
+       };

 
 

-               if (!_extent) {
-                   _extent =  entity.extent(context.graph());
-               } else {
-                   _extent = _extent.extend(entity.extent(context.graph()));
-               }
+       var multiply = function (data, n, c) {
+         var index = -1;
+         var c2 = c;
+         while (++index < 6) {
+           c2 += n * data[index];
+           data[index] = c2 % 1e7;
+           c2 = floor(c2 / 1e7);
+         }
+       };

 
 

-               return actionCircularize(entityID, context.projection);
+       var divide = function (data, n) {
+         var index = 6;
+         var c = 0;
+         while (--index >= 0) {
+           c += data[index];
+           data[index] = floor(c / n);
+           c = (c % n) * 1e7;
+         }
+       };
+
+       var dataToString = function (data) {
+         var index = 6;
+         var s = '';
+         while (--index >= 0) {
+           if (s !== '' || index === 0 || data[index] !== 0) {
+             var t = String(data[index]);
+             s = s === '' ? t : s + repeat$2.call('0', 7 - t.length) + t;

            }
            }

+         } return s;
+       };

 
 

-           var operation = function() {
-               if (!_actions.length) { return; }
+       var FORCED$4 = nativeToFixed && (
+         0.00008.toFixed(3) !== '0.000' ||
+         0.9.toFixed(0) !== '1' ||
+         1.255.toFixed(2) !== '1.25' ||
+         1000000000000000128.0.toFixed(0) !== '1000000000000000128'
+       ) || !fails$7(function () {
+         // V8 ~ Android 4.3-
+         nativeToFixed.call({});
+       });

 
 

-               var combinedAction = function(graph, t) {
-                   _actions.forEach(function(action) {
-                       if (!action.disabled(graph)) {
-                           graph = action(graph, t);
-                       }
-                   });
-                   return graph;
-               };
-               combinedAction.transitionable = true;
+       // `Number.prototype.toFixed` method
+       // https://tc39.es/ecma262/#sec-number.prototype.tofixed
+       $$j({ target: 'Number', proto: true, forced: FORCED$4 }, {
+         toFixed: function toFixed(fractionDigits) {
+           var number = thisNumberValue$1(this);
+           var fractDigits = toInteger(fractionDigits);
+           var data = [0, 0, 0, 0, 0, 0];
+           var sign = '';
+           var result = '0';
+           var e, z, j, k;
+
+           if (fractDigits < 0 || fractDigits > 20) throw RangeError('Incorrect fraction digits');
+           // eslint-disable-next-line no-self-compare -- NaN check
+           if (number != number) return 'NaN';
+           if (number <= -1e21 || number >= 1e21) return String(number);
+           if (number < 0) {
+             sign = '-';
+             number = -number;
+           }
+           if (number > 1e-21) {
+             e = log(number * pow(2, 69, 1)) - 69;
+             z = e < 0 ? number * pow(2, -e, 1) : number / pow(2, e, 1);
+             z *= 0x10000000000000;
+             e = 52 - e;
+             if (e > 0) {
+               multiply(data, 0, z);
+               j = fractDigits;
+               while (j >= 7) {
+                 multiply(data, 1e7, 0);
+                 j -= 7;
+               }
+               multiply(data, pow(10, j, 1), 0);
+               j = e - 1;
+               while (j >= 23) {
+                 divide(data, 1 << 23);
+                 j -= 23;
+               }
+               divide(data, 1 << j);
+               multiply(data, 1, 1);
+               divide(data, 2);
+               result = dataToString(data);
+             } else {
+               multiply(data, 0, z);
+               multiply(data, 1 << -e, 0);
+               result = dataToString(data) + repeat$2.call('0', fractDigits);
+             }
+           }
+           if (fractDigits > 0) {
+             k = result.length;
+             result = sign + (k <= fractDigits
+               ? '0.' + repeat$2.call('0', fractDigits - k) + result
+               : result.slice(0, k - fractDigits) + '.' + result.slice(k - fractDigits));
+           } else {
+             result = sign + result;
+           } return result;
+         }
+       });

 
 

-               context.perform(combinedAction, operation.annotation());
+       var global$1 = global$F;

 
 

-               window.setTimeout(function() {
-                   context.validator().validate();
-               }, 300);  // after any transition
-           };
+       var globalIsFinite = global$1.isFinite;

 
 

+       // `Number.isFinite` method
+       // https://tc39.es/ecma262/#sec-number.isfinite
+       // eslint-disable-next-line es/no-number-isfinite -- safe
+       var numberIsFinite$1 = Number.isFinite || function isFinite(it) {
+         return typeof it == 'number' && globalIsFinite(it);
+       };

 
 

-           operation.available = function() {
-               return _actions.length && selectedIDs.length === _actions.length;
-           };
+       var $$i = _export;
+       var numberIsFinite = numberIsFinite$1;

 
 

+       // `Number.isFinite` method
+       // https://tc39.es/ecma262/#sec-number.isfinite
+       $$i({ target: 'Number', stat: true }, { isFinite: numberIsFinite });

 
 

-           // don't cache this because the visible extent could change
-           operation.disabled = function() {
-               if (!_actions.length) { return ''; }
+       var $$h = _export;
+       var toAbsoluteIndex = toAbsoluteIndex$8;

 
 

-               var actionDisableds = _actions.map(function(action) {
-                   return action.disabled(context.graph());
-               }).filter(Boolean);
+       var fromCharCode = String.fromCharCode;
+       // eslint-disable-next-line es/no-string-fromcodepoint -- required for testing
+       var $fromCodePoint = String.fromCodePoint;

 
 

-               if (actionDisableds.length === _actions.length) {
-                   // none of the features can be circularized
+       // length should be 1, old FF problem
+       var INCORRECT_LENGTH = !!$fromCodePoint && $fromCodePoint.length != 1;

 
 

-                   if (new Set(actionDisableds).size > 1) {
-                       return 'multiple_blockers';
-                   }
-                   return actionDisableds[0];
-               } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
-                   return 'too_large';
-               } else if (someMissing()) {
-                   return 'not_downloaded';
-               } else if (selectedIDs.some(context.hasHiddenConnections)) {
-                   return 'connected_to_hidden';
-               }
+       // `String.fromCodePoint` method
+       // https://tc39.es/ecma262/#sec-string.fromcodepoint
+       $$h({ target: 'String', stat: true, forced: INCORRECT_LENGTH }, {
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         fromCodePoint: function fromCodePoint(x) {
+           var elements = [];
+           var length = arguments.length;
+           var i = 0;
+           var code;
+           while (length > i) {
+             code = +arguments[i++];
+             if (toAbsoluteIndex(code, 0x10FFFF) !== code) throw RangeError(code + ' is not a valid code point');
+             elements.push(code < 0x10000
+               ? fromCharCode(code)
+               : fromCharCode(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00)
+             );
+           } return elements.join('');
+         }
+       });

 
 

-               return false;
+       var fixRegExpWellKnownSymbolLogic = fixRegexpWellKnownSymbolLogic;
+       var anObject = anObject$m;
+       var requireObjectCoercible$5 = requireObjectCoercible$e;
+       var sameValue = sameValue$1;
+       var regExpExec = regexpExecAbstract;

 
 

+       // @@search logic
+       fixRegExpWellKnownSymbolLogic('search', function (SEARCH, nativeSearch, maybeCallNative) {
+         return [
+           // `String.prototype.search` method
+           // https://tc39.es/ecma262/#sec-string.prototype.search
+           function search(regexp) {
+             var O = requireObjectCoercible$5(this);
+             var searcher = regexp == undefined ? undefined : regexp[SEARCH];
+             return searcher !== undefined ? searcher.call(regexp, O) : new RegExp(regexp)[SEARCH](String(O));
+           },
+           // `RegExp.prototype[@@search]` method
+           // https://tc39.es/ecma262/#sec-regexp.prototype-@@search
+           function (string) {
+             var res = maybeCallNative(nativeSearch, this, string);
+             if (res.done) return res.value;
+
+             var rx = anObject(this);
+             var S = String(string);
+
+             var previousLastIndex = rx.lastIndex;
+             if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;
+             var result = regExpExec(rx, S);
+             if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;
+             return result === null ? -1 : result.index;
+           }
+         ];
+       });

 
 

-               function someMissing() {
-                   if (context.inIntro()) { return false; }
-                   var osm = context.connection();
-                   if (osm) {
-                       var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-                       if (missing.length) {
-                           missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-                           return true;
-                       }
-                   }
-                   return false;
-               }
-           };
+       var rbush$2 = {exports: {}};

 
 

+       var quickselect$2 = {exports: {}};

 
 

-           operation.tooltip = function() {
-               var disable = operation.disabled();
-               return disable ?
-                   _t('operations.circularize.' + disable + '.' + _amount) :
-                   _t('operations.circularize.description.' + _amount);
-           };
+       (function (module, exports) {
+         (function (global, factory) {
+           module.exports = factory() ;
+         })(commonjsGlobal, function () {

 
 

+           function quickselect(arr, k, left, right, compare) {
+             quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+           }

 
 

-           operation.annotation = function() {
-               return _t('operations.circularize.annotation.' + _amount);
-           };
+           function quickselectStep(arr, k, left, right, compare) {
+             while (right > left) {
+               if (right - left > 600) {
+                 var n = right - left + 1;
+                 var m = k - left + 1;
+                 var z = Math.log(n);
+                 var s = 0.5 * Math.exp(2 * z / 3);
+                 var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+                 var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+                 var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+                 quickselectStep(arr, k, newLeft, newRight, compare);
+               }

 
 

+               var t = arr[k];
+               var i = left;
+               var j = right;
+               swap(arr, left, k);
+               if (compare(arr[right], t) > 0) swap(arr, left, right);

 
 

-           operation.id = 'circularize';
-           operation.keys = [_t('operations.circularize.key')];
-           operation.title = _t('operations.circularize.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+               while (i < j) {
+                 swap(arr, i, j);
+                 i++;
+                 j--;

 
 

-           return operation;
-       }
+                 while (compare(arr[i], t) < 0) {
+                   i++;
+                 }

 
 

-       // Translate a MacOS key command into the appropriate Windows/Linux equivalent.
-       // For example, ⌘Z -> Ctrl+Z
-       var uiCmd = function (code) {
-           var detected = utilDetect();
+                 while (compare(arr[j], t) > 0) {
+                   j--;
+                 }
+               }

 
 

-           if (detected.os === 'mac') {
-               return code;
+               if (compare(arr[left], t) === 0) swap(arr, left, j);else {
+                 j++;
+                 swap(arr, j, right);
+               }
+               if (j <= k) left = j + 1;
+               if (k <= j) right = j - 1;
+             }

            }
 
            }
 

-           if (detected.os === 'win') {
-               if (code === '⌘⇧Z') { return 'Ctrl+Y'; }
+           function swap(arr, i, j) {
+             var tmp = arr[i];
+             arr[i] = arr[j];
+             arr[j] = tmp;

            }
 
            }
 

-           var result = '',
-               replacements = {
-                   '⌘': 'Ctrl',
-                   '⇧': 'Shift',
-                   '⌥': 'Alt',
-                   '⌫': 'Backspace',
-                   '⌦': 'Delete'
-               };
-
-           for (var i = 0; i < code.length; i++) {
-               if (code[i] in replacements) {
-                   result += replacements[code[i]] + (i < code.length - 1 ? '+' : '');
-               } else {
-                   result += code[i];
-               }
+           function defaultCompare(a, b) {
+             return a < b ? -1 : a > b ? 1 : 0;

            }
 
            }
 

-           return result;
-       };
-
+           return quickselect;
+         });
+       })(quickselect$2);

 
 

-       // return a display-focused string for a given keyboard code
-       uiCmd.display = function(code) {
-           if (code.length !== 1) { return code; }
+       rbush$2.exports = rbush$1;

 
 

-           var detected = utilDetect();
-           var mac = (detected.os === 'mac');
-           var replacements = {
-               '⌘': mac ? '⌘ ' + _t('shortcuts.key.cmd')    : _t('shortcuts.key.ctrl'),
-               '⇧': mac ? '⇧ ' + _t('shortcuts.key.shift')  : _t('shortcuts.key.shift'),
-               '⌥': mac ? '⌥ ' + _t('shortcuts.key.option') : _t('shortcuts.key.alt'),
-               '⌃': mac ? '⌃ ' + _t('shortcuts.key.ctrl')   : _t('shortcuts.key.ctrl'),
-               '⌫': mac ? '⌫ ' + _t('shortcuts.key.delete') : _t('shortcuts.key.backspace'),
-               '⌦': mac ? '⌦ ' + _t('shortcuts.key.del')    : _t('shortcuts.key.del'),
-               '↖': mac ? '↖ ' + _t('shortcuts.key.pgup')   : _t('shortcuts.key.pgup'),
-               '↘': mac ? '↘ ' + _t('shortcuts.key.pgdn')   : _t('shortcuts.key.pgdn'),
-               '⇞': mac ? '⇞ ' + _t('shortcuts.key.home')   : _t('shortcuts.key.home'),
-               '⇟': mac ? '⇟ ' + _t('shortcuts.key.end')    : _t('shortcuts.key.end'),
-               '↵': mac ? '⏎ ' + _t('shortcuts.key.return') : _t('shortcuts.key.enter'),
-               '⎋': mac ? '⎋ ' + _t('shortcuts.key.esc')    : _t('shortcuts.key.esc'),
-               '☰': mac ? '☰ ' + _t('shortcuts.key.menu')  : _t('shortcuts.key.menu'),
-           };
+       rbush$2.exports["default"] = rbush$1;

 
 

-           return replacements[code] || code;
-       };
+       var quickselect$1 = quickselect$2.exports;

 
 

-       function operationDelete(context, selectedIDs) {
-           var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-           var action = actionDeleteMultiple(selectedIDs);
-           var nodes = utilGetAllNodes(selectedIDs, context.graph());
-           var coords = nodes.map(function(n) { return n.loc; });
-           var extent = utilTotalExtent(selectedIDs, context.graph());
+       function rbush$1(maxEntries, format) {
+         if (!(this instanceof rbush$1)) return new rbush$1(maxEntries, format); // max entries in a node is 9 by default; min node fill is 40% for best performance

 
 

+         this._maxEntries = Math.max(4, maxEntries || 9);
+         this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));

 
 

-           var operation = function() {
-               var nextSelectedID;
-               var nextSelectedLoc;
+         if (format) {
+           this._initFormat(format);
+         }

 
 

-               if (selectedIDs.length === 1) {
-                   var id = selectedIDs[0];
-                   var entity = context.entity(id);
-                   var geometry = entity.geometry(context.graph());
-                   var parents = context.graph().parentWays(entity);
-                   var parent = parents[0];
-
-                   // Select the next closest node in the way.
-                   if (geometry === 'vertex') {
-                       var nodes = parent.nodes;
-                       var i = nodes.indexOf(id);
-
-                       if (i === 0) {
-                           i++;
-                       } else if (i === nodes.length - 1) {
-                           i--;
-                       } else {
-                           var a = geoSphericalDistance(entity.loc, context.entity(nodes[i - 1]).loc);
-                           var b = geoSphericalDistance(entity.loc, context.entity(nodes[i + 1]).loc);
-                           i = a < b ? i - 1 : i + 1;
-                       }
+         this.clear();
+       }

 
 

-                       nextSelectedID = nodes[i];
-                       nextSelectedLoc = context.entity(nextSelectedID).loc;
-                   }
-               }
+       rbush$1.prototype = {
+         all: function all() {
+           return this._all(this.data, []);
+         },
+         search: function search(bbox) {
+           var node = this.data,
+               result = [],
+               toBBox = this.toBBox;
+           if (!intersects$1(bbox, node)) return result;
+           var nodesToSearch = [],
+               i,
+               len,
+               child,
+               childBBox;

 
 

-               context.perform(action, operation.annotation());
-               context.validator().validate();
+           while (node) {
+             for (i = 0, len = node.children.length; i < len; i++) {
+               child = node.children[i];
+               childBBox = node.leaf ? toBBox(child) : child;

 
 

-               if (nextSelectedID && nextSelectedLoc) {
-                   if (context.hasEntity(nextSelectedID)) {
-                       context.enter(modeSelect(context, [nextSelectedID]).follow(true));
-                   } else {
-                       context.map().centerEase(nextSelectedLoc);
-                       context.enter(modeBrowse(context));
-                   }
-               } else {
-                   context.enter(modeBrowse(context));
+               if (intersects$1(bbox, childBBox)) {
+                 if (node.leaf) result.push(child);else if (contains$1(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);

                }
                }

+             }

 
 

-           };
-
+             node = nodesToSearch.pop();
+           }

 
 

-           operation.available = function() {
-               return true;
-           };
+           return result;
+         },
+         collides: function collides(bbox) {
+           var node = this.data,
+               toBBox = this.toBBox;
+           if (!intersects$1(bbox, node)) return false;
+           var nodesToSearch = [],
+               i,
+               len,
+               child,
+               childBBox;

 
 

+           while (node) {
+             for (i = 0, len = node.children.length; i < len; i++) {
+               child = node.children[i];
+               childBBox = node.leaf ? toBBox(child) : child;

 
 

-           operation.disabled = function() {
-               if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-                   return 'too_large';
-               } else if (someMissing()) {
-                   return 'not_downloaded';
-               } else if (selectedIDs.some(context.hasHiddenConnections)) {
-                   return 'connected_to_hidden';
-               } else if (selectedIDs.some(protectedMember)) {
-                   return 'part_of_relation';
-               } else if (selectedIDs.some(incompleteRelation)) {
-                   return 'incomplete_relation';
-               } else if (selectedIDs.some(hasWikidataTag)) {
-                   return 'has_wikidata_tag';
+               if (intersects$1(bbox, childBBox)) {
+                 if (node.leaf || contains$1(bbox, childBBox)) return true;
+                 nodesToSearch.push(child);

                }
                }

+             }

 
 

-               return false;
+             node = nodesToSearch.pop();
+           }

 
 

+           return false;
+         },
+         load: function load(data) {
+           if (!(data && data.length)) return this;

 
 

-               function someMissing() {
-                   if (context.inIntro()) { return false; }
-                   var osm = context.connection();
-                   if (osm) {
-                       var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-                       if (missing.length) {
-                           missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-                           return true;
-                       }
-                   }
-                   return false;
-               }
+           if (data.length < this._minEntries) {
+             for (var i = 0, len = data.length; i < len; i++) {
+               this.insert(data[i]);
+             }

 
 

-               function hasWikidataTag(id) {
-                   var entity = context.entity(id);
-                   return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-               }
+             return this;
+           } // recursively build the tree with the given data from scratch using OMT algorithm

 
 

-               function incompleteRelation(id) {
-                   var entity = context.entity(id);
-                   return entity.type === 'relation' && !entity.isComplete(context.graph());
-               }

 
 

-               function protectedMember(id) {
-                   var entity = context.entity(id);
-                   if (entity.type !== 'way') { return false; }
-
-                   var parents = context.graph().parentRelations(entity);
-                   for (var i = 0; i < parents.length; i++) {
-                       var parent = parents[i];
-                       var type = parent.tags.type;
-                       var role = parent.memberById(id).role || 'outer';
-                       if (type === 'route' || type === 'boundary' || (type === 'multipolygon' && role === 'outer')) {
-                           return true;
-                       }
-                   }
-                   return false;
-               }
-           };
+           var node = this._build(data.slice(), 0, data.length - 1, 0);

 
 

+           if (!this.data.children.length) {
+             // save as is if tree is empty
+             this.data = node;
+           } else if (this.data.height === node.height) {
+             // split root if trees have the same height
+             this._splitRoot(this.data, node);
+           } else {
+             if (this.data.height < node.height) {
+               // swap trees if inserted one is bigger
+               var tmpNode = this.data;
+               this.data = node;
+               node = tmpNode;
+             } // insert the small tree into the large tree at appropriate level

 
 

-           operation.tooltip = function() {
-               var disable = operation.disabled();
-               return disable ?
-                   _t('operations.delete.' + disable + '.' + multi) :
-                   _t('operations.delete.description' + '.' + multi);
-           };

 
 

+             this._insert(node, this.data.height - node.height - 1, true);
+           }

 
 

-           operation.annotation = function() {
-               return selectedIDs.length === 1 ?
-                   _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) :
-                   _t('operations.delete.annotation.multiple', { n: selectedIDs.length });
-           };
+           return this;
+         },
+         insert: function insert(item) {
+           if (item) this._insert(item, this.data.height - 1);
+           return this;
+         },
+         clear: function clear() {
+           this.data = createNode$1([]);
+           return this;
+         },
+         remove: function remove(item, equalsFn) {
+           if (!item) return this;
+           var node = this.data,
+               bbox = this.toBBox(item),
+               path = [],
+               indexes = [],
+               i,
+               parent,
+               index,
+               goingUp; // depth-first iterative tree traversal

 
 

+           while (node || path.length) {
+             if (!node) {
+               // go up
+               node = path.pop();
+               parent = path[path.length - 1];
+               i = indexes.pop();
+               goingUp = true;
+             }

 
 

-           operation.id = 'delete';
-           operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
-           operation.title = _t('operations.delete.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+             if (node.leaf) {
+               // check current node
+               index = findItem$1(item, node.children, equalsFn);

 
 

-           return operation;
-       }
+               if (index !== -1) {
+                 // item found, remove the item and condense tree upwards
+                 node.children.splice(index, 1);
+                 path.push(node);

 
 

-       function operationOrthogonalize(context, selectedIDs) {
-           var _extent;
-           var _type;
-           var _actions = selectedIDs.map(chooseAction).filter(Boolean);
-           var _amount = _actions.length === 1 ? 'single' : 'multiple';
-           var _coords = utilGetAllNodes(selectedIDs, context.graph())
-               .map(function(n) { return n.loc; });
+                 this._condense(path);

 
 

+                 return this;
+               }
+             }

 
 

-           function chooseAction(entityID) {
+             if (!goingUp && !node.leaf && contains$1(node, bbox)) {
+               // go down
+               path.push(node);
+               indexes.push(i);
+               i = 0;
+               parent = node;
+               node = node.children[0];
+             } else if (parent) {
+               // go right
+               i++;
+               node = parent.children[i];
+               goingUp = false;
+             } else node = null; // nothing found

 
 

-               var entity = context.entity(entityID);
-               var geometry = entity.geometry(context.graph());
+           }

 
 

-               if (!_extent) {
-                   _extent =  entity.extent(context.graph());
-               } else {
-                   _extent = _extent.extend(entity.extent(context.graph()));
-               }
-
-               // square a line/area
-               if (entity.type === 'way' && new Set(entity.nodes).size > 2 ) {
-                   if (_type && _type !== 'feature') { return null; }
-                   _type = 'feature';
-                   return actionOrthogonalize(entityID, context.projection);
-
-               // square a single vertex
-               } else if (geometry === 'vertex') {
-                   if (_type && _type !== 'corner') { return null; }
-                   _type = 'corner';
-                   var graph = context.graph();
-                   var parents = graph.parentWays(entity);
-                   if (parents.length === 1) {
-                       var way = parents[0];
-                       if (way.nodes.indexOf(entityID) !== -1) {
-                           return actionOrthogonalize(way.id, context.projection, entityID);
-                       }
-                   }
-               }
+           return this;
+         },
+         toBBox: function toBBox(item) {
+           return item;
+         },
+         compareMinX: compareNodeMinX$1,
+         compareMinY: compareNodeMinY$1,
+         toJSON: function toJSON() {
+           return this.data;
+         },
+         fromJSON: function fromJSON(data) {
+           this.data = data;
+           return this;
+         },
+         _all: function _all(node, result) {
+           var nodesToSearch = [];

 
 

-               return null;
+           while (node) {
+             if (node.leaf) result.push.apply(result, node.children);else nodesToSearch.push.apply(nodesToSearch, node.children);
+             node = nodesToSearch.pop();

            }
 
            }
 

+           return result;
+         },
+         _build: function _build(items, left, right, height) {
+           var N = right - left + 1,
+               M = this._maxEntries,
+               node;

 
 

-           var operation = function() {
-               if (!_actions.length) { return; }
+           if (N <= M) {
+             // reached leaf level; return leaf
+             node = createNode$1(items.slice(left, right + 1));
+             calcBBox$1(node, this.toBBox);
+             return node;
+           }

 
 

-               var combinedAction = function(graph, t) {
-                   _actions.forEach(function(action) {
-                       if (!action.disabled(graph)) {
-                           graph = action(graph, t);
-                       }
-                   });
-                   return graph;
-               };
-               combinedAction.transitionable = true;
+           if (!height) {
+             // target height of the bulk-loaded tree
+             height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization

 
 

-               context.perform(combinedAction, operation.annotation());
+             M = Math.ceil(N / Math.pow(M, height - 1));
+           }

 
 

-               window.setTimeout(function() {
-                   context.validator().validate();
-               }, 300);  // after any transition
-           };
+           node = createNode$1([]);
+           node.leaf = false;
+           node.height = height; // split the items into M mostly square tiles

 
 

+           var N2 = Math.ceil(N / M),
+               N1 = N2 * Math.ceil(Math.sqrt(M)),
+               i,
+               j,
+               right2,
+               right3;
+           multiSelect$1(items, left, right, N1, this.compareMinX);

 
 

-           operation.available = function() {
-               return _actions.length && selectedIDs.length === _actions.length;
-           };
+           for (i = left; i <= right; i += N1) {
+             right2 = Math.min(i + N1 - 1, right);
+             multiSelect$1(items, i, right2, N2, this.compareMinY);

 
 

+             for (j = i; j <= right2; j += N2) {
+               right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively

 
 

-           // don't cache this because the visible extent could change
-           operation.disabled = function() {
-               if (!_actions.length) { return ''; }
+               node.children.push(this._build(items, j, right3, height - 1));
+             }
+           }

 
 

-               var actionDisableds = _actions.map(function(action) {
-                   return action.disabled(context.graph());
-               }).filter(Boolean);
+           calcBBox$1(node, this.toBBox);
+           return node;
+         },
+         _chooseSubtree: function _chooseSubtree(bbox, node, level, path) {
+           var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;

 
 

-               if (actionDisableds.length === _actions.length) {
-                   // none of the features can be squared
+           while (true) {
+             path.push(node);
+             if (node.leaf || path.length - 1 === level) break;
+             minArea = minEnlargement = Infinity;

 
 

-                   if (new Set(actionDisableds).size > 1) {
-                       return 'multiple_blockers';
-                   }
-                   return actionDisableds[0];
-               } else if (_extent &&
-                          _extent.percentContainedIn(context.map().extent()) < 0.8) {
-                   return 'too_large';
-               } else if (someMissing()) {
-                   return 'not_downloaded';
-               } else if (selectedIDs.some(context.hasHiddenConnections)) {
-                   return 'connected_to_hidden';
+             for (i = 0, len = node.children.length; i < len; i++) {
+               child = node.children[i];
+               area = bboxArea$1(child);
+               enlargement = enlargedArea$1(bbox, child) - area; // choose entry with the least area enlargement
+
+               if (enlargement < minEnlargement) {
+                 minEnlargement = enlargement;
+                 minArea = area < minArea ? area : minArea;
+                 targetNode = child;
+               } else if (enlargement === minEnlargement) {
+                 // otherwise choose one with the smallest area
+                 if (area < minArea) {
+                   minArea = area;
+                   targetNode = child;
+                 }

                }
                }

+             }

 
 

-               return false;
+             node = targetNode || node.children[0];
+           }

 
 

+           return node;
+         },
+         _insert: function _insert(item, level, isNode) {
+           var toBBox = this.toBBox,
+               bbox = isNode ? item : toBBox(item),
+               insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too

 
 

-               function someMissing() {
-                   if (context.inIntro()) { return false; }
-                   var osm = context.connection();
-                   if (osm) {
-                       var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-                       if (missing.length) {
-                           missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-                           return true;
-                       }
-                   }
-                   return false;
-               }
-           };
+           var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node

 
 
 
 

-           operation.tooltip = function() {
-               var disable = operation.disabled();
-               return disable ?
-                   _t('operations.orthogonalize.' + disable + '.' + _amount) :
-                   _t('operations.orthogonalize.description.' + _type + '.' + _amount);
-           };
+           node.children.push(item);
+           extend$2(node, bbox); // split on node overflow; propagate upwards if necessary

 
 

+           while (level >= 0) {
+             if (insertPath[level].children.length > this._maxEntries) {
+               this._split(insertPath, level);

 
 

-           operation.annotation = function() {
-               return _t('operations.orthogonalize.annotation.' + _type + '.' + _amount);
-           };
+               level--;
+             } else break;
+           } // adjust bboxes along the insertion path

 
 
 
 

-           operation.id = 'orthogonalize';
-           operation.keys = [_t('operations.orthogonalize.key')];
-           operation.title = _t('operations.orthogonalize.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+           this._adjustParentBBoxes(bbox, insertPath, level);
+         },
+         // split overflowed node into two
+         _split: function _split(insertPath, level) {
+           var node = insertPath[level],
+               M = node.children.length,
+               m = this._minEntries;

 
 

-           return operation;
-       }
+           this._chooseSplitAxis(node, m, M);

 
 

-       function operationReflectShort(context, selectedIDs) {
-           return operationReflect(context, selectedIDs, 'short');
-       }
+           var splitIndex = this._chooseSplitIndex(node, m, M);

 
 

+           var newNode = createNode$1(node.children.splice(splitIndex, node.children.length - splitIndex));
+           newNode.height = node.height;
+           newNode.leaf = node.leaf;
+           calcBBox$1(node, this.toBBox);
+           calcBBox$1(newNode, this.toBBox);
+           if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
+         },
+         _splitRoot: function _splitRoot(node, newNode) {
+           // split root node
+           this.data = createNode$1([node, newNode]);
+           this.data.height = node.height + 1;
+           this.data.leaf = false;
+           calcBBox$1(this.data, this.toBBox);
+         },
+         _chooseSplitIndex: function _chooseSplitIndex(node, m, M) {
+           var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;
+           minOverlap = minArea = Infinity;
+
+           for (i = m; i <= M - m; i++) {
+             bbox1 = distBBox$1(node, 0, i, this.toBBox);
+             bbox2 = distBBox$1(node, i, M, this.toBBox);
+             overlap = intersectionArea$1(bbox1, bbox2);
+             area = bboxArea$1(bbox1) + bboxArea$1(bbox2); // choose distribution with minimum overlap
+
+             if (overlap < minOverlap) {
+               minOverlap = overlap;
+               index = i;
+               minArea = area < minArea ? area : minArea;
+             } else if (overlap === minOverlap) {
+               // otherwise choose distribution with minimum area
+               if (area < minArea) {
+                 minArea = area;
+                 index = i;
+               }
+             }
+           }

 
 

-       function operationReflectLong(context, selectedIDs) {
-           return operationReflect(context, selectedIDs, 'long');
-       }
+           return index;
+         },
+         // sorts node children by the best axis for split
+         _chooseSplitAxis: function _chooseSplitAxis(node, m, M) {
+           var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX$1,
+               compareMinY = node.leaf ? this.compareMinY : compareNodeMinY$1,
+               xMargin = this._allDistMargin(node, m, M, compareMinX),
+               yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
+           // otherwise it's already sorted by minY

 
 
 
 

-       function operationReflect(context, selectedIDs, axis) {
-           axis = axis || 'long';
-           var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-           var nodes = utilGetAllNodes(selectedIDs, context.graph());
-           var coords = nodes.map(function(n) { return n.loc; });
-           var extent = utilTotalExtent(selectedIDs, context.graph());
+           if (xMargin < yMargin) node.children.sort(compareMinX);
+         },
+         // total margin of all possible split distributions where each node is at least m full
+         _allDistMargin: function _allDistMargin(node, m, M, compare) {
+           node.children.sort(compare);
+           var toBBox = this.toBBox,
+               leftBBox = distBBox$1(node, 0, m, toBBox),
+               rightBBox = distBBox$1(node, M - m, M, toBBox),
+               margin = bboxMargin$1(leftBBox) + bboxMargin$1(rightBBox),
+               i,
+               child;

 
 

+           for (i = m; i < M - m; i++) {
+             child = node.children[i];
+             extend$2(leftBBox, node.leaf ? toBBox(child) : child);
+             margin += bboxMargin$1(leftBBox);
+           }

 
 

-           var operation = function() {
-               var action = actionReflect(selectedIDs, context.projection)
-                   .useLongAxis(Boolean(axis === 'long'));
+           for (i = M - m - 1; i >= m; i--) {
+             child = node.children[i];
+             extend$2(rightBBox, node.leaf ? toBBox(child) : child);
+             margin += bboxMargin$1(rightBBox);
+           }

 
 

-               context.perform(action, operation.annotation());
+           return margin;
+         },
+         _adjustParentBBoxes: function _adjustParentBBoxes(bbox, path, level) {
+           // adjust bboxes along the given tree path
+           for (var i = level; i >= 0; i--) {
+             extend$2(path[i], bbox);
+           }
+         },
+         _condense: function _condense(path) {
+           // go through the path, removing empty nodes and updating bboxes
+           for (var i = path.length - 1, siblings; i >= 0; i--) {
+             if (path[i].children.length === 0) {
+               if (i > 0) {
+                 siblings = path[i - 1].children;
+                 siblings.splice(siblings.indexOf(path[i]), 1);
+               } else this.clear();
+             } else calcBBox$1(path[i], this.toBBox);
+           }
+         },
+         _initFormat: function _initFormat(format) {
+           // data format (minX, minY, maxX, maxY accessors)
+           // uses eval-type function compilation instead of just accepting a toBBox function
+           // because the algorithms are very sensitive to sorting functions performance,
+           // so they should be dead simple and without inner calls
+           var compareArr = ['return a', ' - b', ';'];
+           this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));
+           this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));
+           this.toBBox = new Function('a', 'return {minX: a' + format[0] + ', minY: a' + format[1] + ', maxX: a' + format[2] + ', maxY: a' + format[3] + '};');
+         }
+       };

 
 

-               window.setTimeout(function() {
-                   context.validator().validate();
-               }, 300);  // after any transition
-           };
+       function findItem$1(item, items, equalsFn) {
+         if (!equalsFn) return items.indexOf(item);

 
 

+         for (var i = 0; i < items.length; i++) {
+           if (equalsFn(item, items[i])) return i;
+         }

 
 

-           operation.available = function() {
-               return nodes.length >= 3;
-           };
+         return -1;
+       } // calculate node's bbox from bboxes of its children

 
 
 
 

-           // don't cache this because the visible extent could change
-           operation.disabled = function() {
-               if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-                   return 'too_large';
-               } else if (someMissing()) {
-                   return 'not_downloaded';
-               } else if (selectedIDs.some(context.hasHiddenConnections)) {
-                   return 'connected_to_hidden';
-               } else if (selectedIDs.some(incompleteRelation)) {
-                   return 'incomplete_relation';
-               }
+       function calcBBox$1(node, toBBox) {
+         distBBox$1(node, 0, node.children.length, toBBox, node);
+       } // min bounding rectangle of node children from k to p-1

 
 

-               return false;

 
 

+       function distBBox$1(node, k, p, toBBox, destNode) {
+         if (!destNode) destNode = createNode$1(null);
+         destNode.minX = Infinity;
+         destNode.minY = Infinity;
+         destNode.maxX = -Infinity;
+         destNode.maxY = -Infinity;

 
 

-               function someMissing() {
-                   if (context.inIntro()) { return false; }
-                   var osm = context.connection();
-                   if (osm) {
-                       var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-                       if (missing.length) {
-                           missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-                           return true;
-                       }
-                   }
-                   return false;
-               }
+         for (var i = k, child; i < p; i++) {
+           child = node.children[i];
+           extend$2(destNode, node.leaf ? toBBox(child) : child);
+         }

 
 

-               function incompleteRelation(id) {
-                   var entity = context.entity(id);
-                   return entity.type === 'relation' && !entity.isComplete(context.graph());
-               }
-           };
+         return destNode;
+       }

 
 

+       function extend$2(a, b) {
+         a.minX = Math.min(a.minX, b.minX);
+         a.minY = Math.min(a.minY, b.minY);
+         a.maxX = Math.max(a.maxX, b.maxX);
+         a.maxY = Math.max(a.maxY, b.maxY);
+         return a;
+       }

 
 

-           operation.tooltip = function() {
-               var disable = operation.disabled();
-               return disable ?
-                   _t('operations.reflect.' + disable + '.' + multi) :
-                   _t('operations.reflect.description.' + axis + '.' + multi);
-           };
+       function compareNodeMinX$1(a, b) {
+         return a.minX - b.minX;
+       }

 
 

+       function compareNodeMinY$1(a, b) {
+         return a.minY - b.minY;
+       }

 
 

-           operation.annotation = function() {
-               return _t('operations.reflect.annotation.' + axis + '.' + multi);
-           };
+       function bboxArea$1(a) {
+         return (a.maxX - a.minX) * (a.maxY - a.minY);
+       }

 
 

+       function bboxMargin$1(a) {
+         return a.maxX - a.minX + (a.maxY - a.minY);
+       }

 
 

-           operation.id = 'reflect-' + axis;
-           operation.keys = [_t('operations.reflect.key.' + axis)];
-           operation.title = _t('operations.reflect.title.' + axis);
-           operation.behavior = behaviorOperation(context).which(operation);
+       function enlargedArea$1(a, b) {
+         return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
+       }

 
 

-           return operation;
+       function intersectionArea$1(a, b) {
+         var minX = Math.max(a.minX, b.minX),
+             minY = Math.max(a.minY, b.minY),
+             maxX = Math.min(a.maxX, b.maxX),
+             maxY = Math.min(a.maxY, b.maxY);
+         return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);

        }
 
        }
 

-       function operationMove(context, selectedIDs) {
-           var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-           var nodes = utilGetAllNodes(selectedIDs, context.graph());
-           var coords = nodes.map(function(n) { return n.loc; });
-           var extent = utilTotalExtent(selectedIDs, context.graph());
+       function contains$1(a, b) {
+         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+       }

 
 

+       function intersects$1(a, b) {
+         return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+       }

 
 

-           var operation = function() {
-               context.enter(modeMove(context, selectedIDs));
-           };
+       function createNode$1(children) {
+         return {
+           children: children,
+           height: 1,
+           leaf: true,
+           minX: Infinity,
+           minY: Infinity,
+           maxX: -Infinity,
+           maxY: -Infinity
+         };
+       } // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
+       // combines selection algorithm with binary divide & conquer approach

 
 
 
 

-           operation.available = function() {
-               return selectedIDs.length > 1 ||
-                   context.entity(selectedIDs[0]).type !== 'node';
-           };
+       function multiSelect$1(arr, left, right, n, compare) {
+         var stack = [left, right],
+             mid;

 
 

+         while (stack.length) {
+           right = stack.pop();
+           left = stack.pop();
+           if (right - left <= n) continue;
+           mid = left + Math.ceil((right - left) / n / 2) * n;
+           quickselect$1(arr, mid, left, right, compare);
+           stack.push(left, mid, mid, right);
+         }
+       }

 
 

-           operation.disabled = function() {
-               if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-                   return 'too_large';
-               } else if (someMissing()) {
-                   return 'not_downloaded';
-               } else if (selectedIDs.some(context.hasHiddenConnections)) {
-                   return 'connected_to_hidden';
-               } else if (selectedIDs.some(incompleteRelation)) {
-                   return 'incomplete_relation';
-               }
+       var lineclip_1 = lineclip$2;
+       lineclip$2.polyline = lineclip$2;
+       lineclip$2.polygon = polygonclip$1; // Cohen-Sutherland line clippign algorithm, adapted to efficiently
+       // handle polylines rather than just segments

 
 

-               return false;
+       function lineclip$2(points, bbox, result) {
+         var len = points.length,
+             codeA = bitCode$1(points[0], bbox),
+             part = [],
+             i,
+             a,
+             b,
+             codeB,
+             lastCode;
+         if (!result) result = [];

 
 

+         for (i = 1; i < len; i++) {
+           a = points[i - 1];
+           b = points[i];
+           codeB = lastCode = bitCode$1(b, bbox);

 
 

-               function someMissing() {
-                   if (context.inIntro()) { return false; }
-                   var osm = context.connection();
-                   if (osm) {
-                       var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-                       if (missing.length) {
-                           missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-                           return true;
-                       }
-                   }
-                   return false;
+           while (true) {
+             if (!(codeA | codeB)) {
+               // accept
+               part.push(a);
+
+               if (codeB !== lastCode) {
+                 // segment went outside
+                 part.push(b);
+
+                 if (i < len - 1) {
+                   // start a new line
+                   result.push(part);
+                   part = [];
+                 }
+               } else if (i === len - 1) {
+                 part.push(b);

                }
 
                }
 

-               function incompleteRelation(id) {
-                   var entity = context.entity(id);
-                   return entity.type === 'relation' && !entity.isComplete(context.graph());
-               }
-           };
+               break;
+             } else if (codeA & codeB) {
+               // trivial reject
+               break;
+             } else if (codeA) {
+               // a outside, intersect with clip edge
+               a = intersect$1(a, b, codeA, bbox);
+               codeA = bitCode$1(a, bbox);
+             } else {
+               // b outside
+               b = intersect$1(a, b, codeB, bbox);
+               codeB = bitCode$1(b, bbox);
+             }
+           }

 
 

+           codeA = lastCode;
+         }

 
 

-           operation.tooltip = function() {
-               var disable = operation.disabled();
-               return disable ?
-                   _t('operations.move.' + disable + '.' + multi) :
-                   _t('operations.move.description.' + multi);
-           };
+         if (part.length) result.push(part);
+         return result;
+       } // Sutherland-Hodgeman polygon clipping algorithm

 
 
 
 

-           operation.annotation = function() {
-               return selectedIDs.length === 1 ?
-                   _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) :
-                   _t('operations.move.annotation.multiple');
-           };
+       function polygonclip$1(points, bbox) {
+         var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle

 
 

+         for (edge = 1; edge <= 8; edge *= 2) {
+           result = [];
+           prev = points[points.length - 1];
+           prevInside = !(bitCode$1(prev, bbox) & edge);

 
 

-           operation.id = 'move';
-           operation.keys = [_t('operations.move.key')];
-           operation.title = _t('operations.move.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+           for (i = 0; i < points.length; i++) {
+             p = points[i];
+             inside = !(bitCode$1(p, bbox) & edge); // if segment goes through the clip window, add an intersection

 
 

-           operation.mouseOnly = true;
+             if (inside !== prevInside) result.push(intersect$1(prev, p, edge, bbox));
+             if (inside) result.push(p); // add a point if it's inside

 
 

-           return operation;
-       }
+             prev = p;
+             prevInside = inside;
+           }

 
 

-       function modeRotate(context, entityIDs) {
-           var mode = {
-               id: 'rotate',
-               button: 'browse'
-           };
+           points = result;
+           if (!points.length) break;
+         }

 
 

-           var keybinding = utilKeybinding('rotate');
-           var behaviors = [
-               behaviorEdit(context),
-               operationCircularize(context, entityIDs).behavior,
-               operationDelete(context, entityIDs).behavior,
-               operationMove(context, entityIDs).behavior,
-               operationOrthogonalize(context, entityIDs).behavior,
-               operationReflectLong(context, entityIDs).behavior,
-               operationReflectShort(context, entityIDs).behavior
-           ];
-           var annotation = entityIDs.length === 1 ?
-               _t('operations.rotate.annotation.' + context.graph().geometry(entityIDs[0])) :
-               _t('operations.rotate.annotation.multiple');
+         return result;
+       } // intersect a segment against one of the 4 lines that make up the bbox

 
 

-           var _prevGraph;
-           var _prevAngle;
-           var _prevTransform;
-           var _pivot;

 
 

+       function intersect$1(a, b, edge, bbox) {
+         return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
+         edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
+         edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
+         edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
+         null;
+       } // bit code reflects the point position relative to the bbox:
+       //         left  mid  right
+       //    top  1001  1000  1010
+       //    mid  0001  0000  0010
+       // bottom  0101  0100  0110

 
 

-           function doRotate() {
-               var fn;
-               if (context.graph() !== _prevGraph) {
-                   fn = context.perform;
-               } else {
-                   fn = context.replace;
-               }

 
 

-               // projection changed, recalculate _pivot
-               var projection = context.projection;
-               var currTransform = projection.transform();
-               if (!_prevTransform ||
-                   currTransform.k !== _prevTransform.k ||
-                   currTransform.x !== _prevTransform.x ||
-                   currTransform.y !== _prevTransform.y) {
+       function bitCode$1(p, bbox) {
+         var code = 0;
+         if (p[0] < bbox[0]) code |= 1; // left
+         else if (p[0] > bbox[2]) code |= 2; // right

 
 

-                   var nodes = utilGetAllNodes(entityIDs, context.graph());
-                   var points = nodes.map(function(n) { return projection(n.loc); });
-                   _pivot = getPivot(points);
-                   _prevAngle = undefined;
-               }
+         if (p[1] < bbox[1]) code |= 4; // bottom
+         else if (p[1] > bbox[3]) code |= 8; // top

 
 

+         return code;
+       }

 
 

-               var currMouse = context.map().mouse();
-               var currAngle = Math.atan2(currMouse[1] - _pivot[1], currMouse[0] - _pivot[0]);
+       var rbush = rbush$2.exports;
+       var lineclip$1 = lineclip_1;
+       var whichPolygon_1 = whichPolygon;

 
 

-               if (typeof _prevAngle === 'undefined') { _prevAngle = currAngle; }
-               var delta = currAngle - _prevAngle;
+       function whichPolygon(data) {
+         var bboxes = [];

 
 

-               fn(actionRotate(entityIDs, _pivot, delta, projection));
+         for (var i = 0; i < data.features.length; i++) {
+           var feature = data.features[i];
+           var coords = feature.geometry.coordinates;

 
 

-               _prevTransform = currTransform;
-               _prevAngle = currAngle;
-               _prevGraph = context.graph();
+           if (feature.geometry.type === 'Polygon') {
+             bboxes.push(treeItem(coords, feature.properties));
+           } else if (feature.geometry.type === 'MultiPolygon') {
+             for (var j = 0; j < coords.length; j++) {
+               bboxes.push(treeItem(coords[j], feature.properties));
+             }

            }
            }

+         }

 
 

-           function getPivot(points) {
-               var _pivot;
-               if (points.length === 1) {
-                   _pivot = points[0];
-               } else if (points.length === 2) {
-                   _pivot = geoVecInterp(points[0], points[1], 0.5);
-               } else {
-                   var polygonHull = d3_polygonHull(points);
-                   if (polygonHull.length === 2) {
-                       _pivot = geoVecInterp(points[0], points[1], 0.5);
-                   } else {
-                       _pivot = d3_polygonCentroid(d3_polygonHull(points));
-                   }
-               }
-               return _pivot;
-           }
+         var tree = rbush().load(bboxes);

 
 

+         function query(p, multi) {
+           var output = [],
+               result = tree.search({
+             minX: p[0],
+             minY: p[1],
+             maxX: p[0],
+             maxY: p[1]
+           });

 
 

-           function finish() {
-               event.stopPropagation();
-               context.replace(actionNoop(), annotation);
-               context.enter(modeSelect(context, entityIDs));
+           for (var i = 0; i < result.length; i++) {
+             if (insidePolygon(result[i].coords, p)) {
+               if (multi) output.push(result[i].props);else return result[i].props;
+             }

            }
 
            }
 

+           return multi && output.length ? output : null;
+         }

 
 

-           function cancel() {
-               context.pop();
-               context.enter(modeSelect(context, entityIDs));
-           }
+         query.tree = tree;

 
 

+         query.bbox = function queryBBox(bbox) {
+           var output = [];
+           var result = tree.search({
+             minX: bbox[0],
+             minY: bbox[1],
+             maxX: bbox[2],
+             maxY: bbox[3]
+           });

 
 

-           function undone() {
-               context.enter(modeBrowse(context));
+           for (var i = 0; i < result.length; i++) {
+             if (polygonIntersectsBBox(result[i].coords, bbox)) {
+               output.push(result[i].props);
+             }

            }
 
            }
 

+           return output;
+         };

 
 

-           mode.enter = function() {
-               context.features().forceVisible(entityIDs);
+         return query;
+       }

 
 

-               behaviors.forEach(context.install);
+       function polygonIntersectsBBox(polygon, bbox) {
+         var bboxCenter = [(bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2];
+         if (insidePolygon(polygon, bboxCenter)) return true;

 
 

-               context.surface()
-                   .on('mousemove.rotate', doRotate)
-                   .on('click.rotate', finish);
+         for (var i = 0; i < polygon.length; i++) {
+           if (lineclip$1(polygon[i], bbox).length > 0) return true;
+         }

 
 

-               context.history()
-                   .on('undone.rotate', undone);
+         return false;
+       } // ray casting algorithm for detecting if point is in polygon

 
 

-               keybinding
-                   .on('⎋', cancel)
-                   .on('↩', finish);

 
 

-               select(document)
-                   .call(keybinding);
-           };
+       function insidePolygon(rings, p) {
+         var inside = false;

 
 

+         for (var i = 0, len = rings.length; i < len; i++) {
+           var ring = rings[i];

 
 

-           mode.exit = function() {
-               behaviors.forEach(context.uninstall);
+           for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
+             if (rayIntersect(p, ring[j], ring[k])) inside = !inside;
+           }
+         }

 
 

-               context.surface()
-                   .on('mousemove.rotate', null)
-                   .on('click.rotate', null);
+         return inside;
+       }

 
 

-               context.history()
-                   .on('undone.rotate', null);
+       function rayIntersect(p, p1, p2) {
+         return p1[1] > p[1] !== p2[1] > p[1] && p[0] < (p2[0] - p1[0]) * (p[1] - p1[1]) / (p2[1] - p1[1]) + p1[0];
+       }
+
+       function treeItem(coords, props) {
+         var item = {
+           minX: Infinity,
+           minY: Infinity,
+           maxX: -Infinity,
+           maxY: -Infinity,
+           coords: coords,
+           props: props
+         };

 
 

-               select(document)
-                   .call(keybinding.unbind);
+         for (var i = 0; i < coords[0].length; i++) {
+           var p = coords[0][i];
+           item.minX = Math.min(item.minX, p[0]);
+           item.minY = Math.min(item.minY, p[1]);
+           item.maxX = Math.max(item.maxX, p[0]);
+           item.maxY = Math.max(item.maxY, p[1]);
+         }

 
 

-               context.features().forceVisible([]);
-           };
+         return item;
+       }

 
 

+       var type = "FeatureCollection";
+       var features = [{
+         type: "Feature",
+         properties: {
+           wikidata: "Q21",
+           nameEn: "England",
+           aliases: ["GB-ENG"],
+           country: "GB",
+           groups: ["Q23666", "Q3336843", "154", "150", "UN"],
+           driveSide: "left",
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["44"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-6.03913, 51.13217], [-7.74976, 48.64773], [1.17405, 50.74239], [2.18458, 51.52087], [2.56575, 51.85301], [0.792, 57.56437], [-2.30613, 55.62698], [-2.17058, 55.45916], [-2.6095, 55.28488], [-2.63532, 55.19452], [-3.02906, 55.04606], [-3.09361, 54.94924], [-3.38407, 54.94278], [-4.1819, 54.57861], [-3.5082, 53.54318], [-3.08228, 53.25526], [-3.03675, 53.25092], [-2.92329, 53.19383], [-2.92022, 53.17685], [-2.98598, 53.15589], [-2.90649, 53.10964], [-2.87469, 53.12337], [-2.89131, 53.09374], [-2.83133, 52.99184], [-2.7251, 52.98389], [-2.72221, 52.92969], [-2.80549, 52.89428], [-2.85897, 52.94487], [-2.92401, 52.93836], [-2.97243, 52.9651], [-3.13576, 52.895], [-3.15744, 52.84947], [-3.16105, 52.79599], [-3.08734, 52.77504], [-3.01001, 52.76636], [-2.95581, 52.71794], [-3.01724, 52.72083], [-3.04398, 52.65435], [-3.13648, 52.58208], [-3.12926, 52.5286], [-3.09746, 52.53077], [-3.08662, 52.54811], [-3.00929, 52.57774], [-2.99701, 52.551], [-3.03603, 52.49969], [-3.13359, 52.49174], [-3.22971, 52.45344], [-3.22754, 52.42526], [-3.04687, 52.34504], [-2.95364, 52.3501], [-2.99701, 52.323], [-3.00785, 52.2753], [-3.09289, 52.20546], [-3.12638, 52.08114], [-2.97111, 51.90456], [-2.8818, 51.93196], [-2.78742, 51.88833], [-2.74277, 51.84367], [-2.66234, 51.83555], [-2.66336, 51.59504], [-3.20563, 51.31615], [-6.03913, 51.13217]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q22",
+           nameEn: "Scotland",
+           aliases: ["GB-SCT"],
+           country: "GB",
+           groups: ["Q23666", "Q3336843", "154", "150", "UN"],
+           driveSide: "left",
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["44"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[0.792, 57.56437], [-0.3751, 61.32236], [-14.78497, 57.60709], [-6.82333, 55.83103], [-4.69044, 54.3629], [-3.38407, 54.94278], [-3.09361, 54.94924], [-3.02906, 55.04606], [-2.63532, 55.19452], [-2.6095, 55.28488], [-2.17058, 55.45916], [-2.30613, 55.62698], [0.792, 57.56437]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q25",
+           nameEn: "Wales",
+           aliases: ["GB-WLS"],
+           country: "GB",
+           groups: ["Q23666", "Q3336843", "154", "150", "UN"],
+           driveSide: "left",
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["44"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-3.5082, 53.54318], [-5.37267, 53.63269], [-6.03913, 51.13217], [-3.20563, 51.31615], [-2.66336, 51.59504], [-2.66234, 51.83555], [-2.74277, 51.84367], [-2.78742, 51.88833], [-2.8818, 51.93196], [-2.97111, 51.90456], [-3.12638, 52.08114], [-3.09289, 52.20546], [-3.00785, 52.2753], [-2.99701, 52.323], [-2.95364, 52.3501], [-3.04687, 52.34504], [-3.22754, 52.42526], [-3.22971, 52.45344], [-3.13359, 52.49174], [-3.03603, 52.49969], [-2.99701, 52.551], [-3.00929, 52.57774], [-3.08662, 52.54811], [-3.09746, 52.53077], [-3.12926, 52.5286], [-3.13648, 52.58208], [-3.04398, 52.65435], [-3.01724, 52.72083], [-2.95581, 52.71794], [-3.01001, 52.76636], [-3.08734, 52.77504], [-3.16105, 52.79599], [-3.15744, 52.84947], [-3.13576, 52.895], [-2.97243, 52.9651], [-2.92401, 52.93836], [-2.85897, 52.94487], [-2.80549, 52.89428], [-2.72221, 52.92969], [-2.7251, 52.98389], [-2.83133, 52.99184], [-2.89131, 53.09374], [-2.87469, 53.12337], [-2.90649, 53.10964], [-2.98598, 53.15589], [-2.92022, 53.17685], [-2.92329, 53.19383], [-3.03675, 53.25092], [-3.08228, 53.25526], [-3.5082, 53.54318]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q26",
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+           coordinates: [[[[31.30611, -22.422], [31.16344, -22.32599], [31.08932, -22.34884], [30.86696, -22.28907], [30.6294, -22.32599], [30.48686, -22.31368], [30.38614, -22.34533], [30.28351, -22.35587], [30.2265, -22.2961], [30.13147, -22.30841], [29.92242, -22.19408], [29.76848, -22.14128], [29.64609, -22.12917], [29.37703, -22.19581], [29.21955, -22.17771], [29.18974, -22.18599], [29.15268, -22.21399], [29.10881, -22.21202], [29.0151, -22.22907], [28.91889, -22.44299], [28.63287, -22.55887], [28.34874, -22.5694], [28.04562, -22.8394], [28.04752, -22.90243], [27.93729, -22.96194], [27.93539, -23.04941], [27.74154, -23.2137], [27.6066, -23.21894], [27.52393, -23.37952], [27.33768, -23.40917], [26.99749, -23.65486], [26.84165, -24.24885], [26.51667, -24.47219], [26.46346, -24.60358], [26.39409, -24.63468], [25.8515, -24.75727], [25.84295, -24.78661], [25.88571, -24.87802], [25.72702, -25.25503], [25.69661, -25.29284], [25.6643, -25.4491], [25.58543, -25.6343], [25.33076, -25.76616], [25.12266, -25.75931], [25.01718, -25.72507], [24.8946, -25.80723], [24.67319, -25.81749], [24.44703, -25.73021], [24.36531, -25.773], [24.18287, -25.62916], [23.9244, -25.64286], [23.47588, -25.29971], [23.03497, -25.29971], [22.86012, -25.50572], [22.70808, -25.99186], [22.56365, -26.19668], [22.41921, -26.23078], [22.21206, -26.3773], [22.06192, -26.61882], [21.90703, -26.66808], [21.83291, -26.65959], [21.77114, -26.69015], [21.7854, -26.79199], [21.69322, -26.86152], [21.37869, -26.82083], [21.13353, -26.86661], [20.87031, -26.80047], [20.68596, -26.9039], [20.63275, -26.78181], [20.61754, -26.4692], [20.86081, -26.14892], [20.64795, -25.47827], [20.29826, -24.94869], [20.03678, -24.81004], [20.02809, -24.78725], [19.99817, -24.76768], [19.99882, -28.42622], [18.99885, -28.89165], [17.4579, -28.68718], [17.15405, -28.08573], [16.90446, -28.057], [16.59922, -28.53246], [16.46592, -28.57126], [16.45332, -28.63117], [12.51595, -32.27486], [38.88176, -48.03306], [34.51034, -26.91792], [32.35222, -26.86027], [32.29584, -26.852], [32.22302, -26.84136], [32.19409, -26.84032], [32.13315, -26.84345], [32.09664, -26.80721], [32.00893, -26.8096], [31.97463, -27.11057], [31.97592, -27.31675], [31.49834, -27.31549], [31.15027, -27.20151], [30.96088, -27.0245], [30.97757, -26.92706], [30.88826, -26.79622], [30.81101, -26.84722], [30.78927, -26.48271], [30.95819, -26.26303], [31.13073, -25.91558], [31.31237, -25.7431], [31.4175, -25.71886], [31.86881, -25.99973], [31.974, -25.95387], [31.92649, -25.84216], [32.00631, -25.65044], [31.97875, -25.46356], [32.01676, -25.38117], [32.03196, -25.10785], [31.9835, -24.29983], [31.90368, -24.18892], [31.87707, -23.95293], [31.77445, -23.90082], [31.70223, -23.72695], [31.67942, -23.60858], [31.56539, -23.47268], [31.55779, -23.176], [31.30611, -22.422]], [[29.33204, -29.45598], [29.28545, -29.58456], [29.12553, -29.76266], [29.16548, -29.91706], [28.9338, -30.05072], [28.80222, -30.10579], [28.68627, -30.12885], [28.399, -30.1592], [28.2319, -30.28476], [28.12073, -30.68072], [27.74814, -30.60635], [27.69467, -30.55862], [27.67819, -30.53437], [27.6521, -30.51707], [27.62137, -30.50509], [27.56781, -30.44562], [27.56901, -30.42504], [27.45452, -30.32239], [27.38108, -30.33456], [27.36649, -30.27246], [27.37293, -30.19401], [27.40778, -30.14577], [27.32555, -30.14785], [27.29603, -30.05473], [27.22719, -30.00718], [27.09489, -29.72796], [27.01016, -29.65439], [27.33464, -29.48161], [27.4358, -29.33465], [27.47254, -29.31968], [27.45125, -29.29708], [27.48679, -29.29349], [27.54258, -29.25575], [27.5158, -29.2261], [27.55974, -29.18954], [27.75458, -28.89839], [27.8907, -28.91612], [27.88933, -28.88156], [27.9392, -28.84864], [27.98675, -28.8787], [28.02503, -28.85991], [28.1317, -28.7293], [28.2348, -28.69471], [28.30518, -28.69531], [28.40612, -28.6215], [28.65091, -28.57025], [28.68043, -28.58744], [29.40524, -29.21246], [29.44883, -29.3772], [29.33204, -29.45598]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "ZM",
+           iso1A3: "ZMB",
+           iso1N3: "894",
+           wikidata: "Q953",
+           nameEn: "Zambia",
+           groups: ["014", "202", "002", "UN"],
+           driveSide: "left",
+           callingCodes: ["260"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[32.95389, -9.40138], [32.76233, -9.31963], [32.75611, -9.28583], [32.53661, -9.24281], [32.49147, -9.14754], [32.43543, -9.11988], [32.25486, -9.13371], [32.16146, -9.05993], [32.08206, -9.04609], [31.98866, -9.07069], [31.94196, -9.02303], [31.94663, -8.93846], [31.81587, -8.88618], [31.71158, -8.91386], [31.57147, -8.81388], [31.57147, -8.70619], [31.37533, -8.60769], [31.00796, -8.58615], [30.79243, -8.27382], [28.88917, -8.4831], [28.9711, -8.66935], [28.38526, -9.23393], [28.36562, -9.30091], [28.52636, -9.35379], [28.51627, -9.44726], [28.56208, -9.49122], [28.68532, -9.78], [28.62795, -9.92942], [28.65032, -10.65133], [28.37241, -11.57848], [28.48357, -11.87532], [29.18592, -12.37921], [29.4992, -12.43843], [29.48404, -12.23604], [29.8139, -12.14898], [29.81551, -13.44683], [29.65078, -13.41844], [29.60531, -13.21685], [29.01918, -13.41353], [28.33199, -12.41375], [27.59932, -12.22123], [27.21025, -11.76157], [27.22541, -11.60323], [27.04351, -11.61312], [26.88687, -12.01868], [26.01777, -11.91488], [25.33058, -11.65767], [25.34069, -11.19707], [24.42612, -11.44975], [24.34528, -11.06816], [24.00027, -10.89356], [24.02603, -11.15368], [23.98804, -12.13149], [24.06672, -12.29058], [23.90937, -12.844], [24.03339, -12.99091], [21.97988, -13.00148], [22.00323, -16.18028], [22.17217, -16.50269], [23.20038, -17.47563], [23.47474, -17.62877], [24.23619, -17.47489], [24.32811, -17.49082], [24.38712, -17.46818], [24.5621, -17.52963], [24.70864, -17.49501], [25.00198, -17.58221], [25.26433, -17.79571], [25.51646, -17.86232], [25.6827, -17.81987], [25.85738, -17.91403], [25.85892, -17.97726], [26.08925, -17.98168], [26.0908, -17.93021], [26.21601, -17.88608], [26.55918, -17.99638], [26.68403, -18.07411], [26.74314, -18.0199], [26.89926, -17.98756], [27.14196, -17.81398], [27.30736, -17.60487], [27.61377, -17.34378], [27.62795, -17.24365], [27.83141, -16.96274], [28.73725, -16.5528], [28.76199, -16.51575], [28.81454, -16.48611], [28.8501, -16.04537], [28.9243, -15.93987], [29.01298, -15.93805], [29.21955, -15.76589], [29.4437, -15.68702], [29.8317, -15.6126], [30.35574, -15.6513], [30.41902, -15.62269], [30.22098, -14.99447], [33.24249, -14.00019], [33.16749, -13.93992], [33.07568, -13.98447], [33.02977, -14.05022], [32.99042, -13.95689], [32.88985, -13.82956], [32.79015, -13.80755], [32.76962, -13.77224], [32.84528, -13.71576], [32.7828, -13.64805], [32.68654, -13.64268], [32.66468, -13.60019], [32.68436, -13.55769], [32.73683, -13.57682], [32.84176, -13.52794], [32.86113, -13.47292], [33.0078, -13.19492], [32.98289, -13.12671], [33.02181, -12.88707], [32.96733, -12.88251], [32.94397, -12.76868], [33.05917, -12.59554], [33.18837, -12.61377], [33.28177, -12.54692], [33.37517, -12.54085], [33.54485, -12.35996], [33.47636, -12.32498], [33.3705, -12.34931], [33.25998, -12.14242], [33.33937, -11.91252], [33.32692, -11.59248], [33.24252, -11.59302], [33.23663, -11.40637], [33.29267, -11.43536], [33.29267, -11.3789], [33.39697, -11.15296], [33.25998, -10.88862], [33.28022, -10.84428], [33.47636, -10.78465], [33.70675, -10.56896], [33.54797, -10.36077], [33.53863, -10.20148], [33.31297, -10.05133], [33.37902, -9.9104], [33.36581, -9.81063], [33.31517, -9.82364], [33.2095, -9.61099], [33.12144, -9.58929], [33.10163, -9.66525], [33.05485, -9.61316], [33.00256, -9.63053], [33.00476, -9.5133], [32.95389, -9.40138]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           iso1A2: "ZW",
+           iso1A3: "ZWE",
+           iso1N3: "716",
+           wikidata: "Q954",
+           nameEn: "Zimbabwe",
+           groups: ["014", "202", "002", "UN"],
+           driveSide: "left",
+           callingCodes: ["263"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[30.41902, -15.62269], [30.35574, -15.6513], [29.8317, -15.6126], [29.4437, -15.68702], [29.21955, -15.76589], [29.01298, -15.93805], [28.9243, -15.93987], [28.8501, -16.04537], [28.81454, -16.48611], [28.76199, -16.51575], [28.73725, -16.5528], [27.83141, -16.96274], [27.62795, -17.24365], [27.61377, -17.34378], [27.30736, -17.60487], [27.14196, -17.81398], [26.89926, -17.98756], [26.74314, -18.0199], [26.68403, -18.07411], [26.55918, -17.99638], [26.21601, -17.88608], [26.0908, -17.93021], [26.08925, -17.98168], [25.85892, -17.97726], [25.85738, -17.91403], [25.6827, -17.81987], [25.51646, -17.86232], [25.26433, -17.79571], [25.23909, -17.90832], [25.31799, -18.07091], [25.39972, -18.12691], [25.53465, -18.39041], [25.68859, -18.56165], [25.79217, -18.6355], [25.82353, -18.82808], [25.94326, -18.90362], [25.99837, -19.02943], [25.96226, -19.08152], [26.17227, -19.53709], [26.72246, -19.92707], [27.21278, -20.08244], [27.29831, -20.28935], [27.28865, -20.49873], [27.69361, -20.48531], [27.72972, -20.51735], [27.69171, -21.08409], [27.91407, -21.31621], [28.01669, -21.57624], [28.29416, -21.59037], [28.49942, -21.66634], [28.58114, -21.63455], [29.07763, -21.81877], [29.04023, -21.85864], [29.02191, -21.90647], [29.02191, -21.95665], [29.04108, -22.00563], [29.08495, -22.04867], [29.14501, -22.07275], [29.1974, -22.07472], [29.24648, -22.05967], [29.3533, -22.18363], [29.37703, -22.19581], [29.64609, -22.12917], [29.76848, -22.14128], [29.92242, -22.19408], [30.13147, -22.30841], [30.2265, -22.2961], [30.28351, -22.35587], [30.38614, -22.34533], [30.48686, -22.31368], [30.6294, -22.32599], [30.86696, -22.28907], [31.08932, -22.34884], [31.16344, -22.32599], [31.30611, -22.422], [31.38336, -22.36919], [32.41234, -21.31246], [32.48236, -21.32873], [32.37115, -21.133], [32.51644, -20.91929], [32.48122, -20.63319], [32.55167, -20.56312], [32.66174, -20.56106], [32.85987, -20.27841], [32.85987, -20.16686], [32.93032, -20.03868], [33.01178, -20.02007], [33.06461, -19.77787], [32.95013, -19.67219], [32.84666, -19.68462], [32.84446, -19.48343], [32.78282, -19.47513], [32.77966, -19.36098], [32.85107, -19.29238], [32.87088, -19.09279], [32.84006, -19.0262], [32.72118, -19.02204], [32.69917, -18.94293], [32.73439, -18.92628], [32.70137, -18.84712], [32.82465, -18.77419], [32.9017, -18.7992], [32.95013, -18.69079], [32.88629, -18.58023], [32.88629, -18.51344], [33.02278, -18.4696], [33.03159, -18.35054], [32.94133, -17.99705], [33.0492, -17.60298], [32.98536, -17.55891], [32.96554, -17.48964], [33.0426, -17.3468], [33.00517, -17.30477], [32.96554, -17.11971], [32.84113, -16.92259], [32.91051, -16.89446], [32.97655, -16.70689], [32.78943, -16.70267], [32.69917, -16.66893], [32.71017, -16.59932], [32.42838, -16.4727], [32.28529, -16.43892], [32.02772, -16.43892], [31.91324, -16.41569], [31.90223, -16.34388], [31.67988, -16.19595], [31.42451, -16.15154], [31.30563, -16.01193], [31.13171, -15.98019], [30.97761, -16.05848], [30.91597, -15.99924], [30.42568, -15.9962], [30.41902, -15.62269]]]]
+         }
+       }];
+       var borders_default = {
+         type: type,
+         features: features
+       }; // src/country-coder.ts

 
 

-           mode.selectedIDs = function() {
-               if (!arguments.length) { return entityIDs; }
-               // no assign
-               return mode;
-           };
+       var borders = borders_default;
+       var whichPolygonGetter = {};
+       var featuresByCode = {};
+       var idFilterRegex = /(?=(?!^(and|the|of|el|la|de)$))(\b(and|the|of|el|la|de)\b)|[-_ .,'()&[\]/]/gi;

 
 

+       function canonicalID(id) {
+         var s = id || "";

 
 

-           return mode;
+         if (s.charAt(0) === ".") {
+           return s.toUpperCase();
+         } else {
+           return s.replace(idFilterRegex, "").toUpperCase();
+         }

        }
 
        }
 

-       function operationRotate(context, selectedIDs) {
-           var multi = (selectedIDs.length === 1 ? 'single' : 'multiple');
-           var nodes = utilGetAllNodes(selectedIDs, context.graph());
-           var coords = nodes.map(function(n) { return n.loc; });
-           var extent = utilTotalExtent(selectedIDs, context.graph());
-
-
-           var operation = function() {
-               context.enter(modeRotate(context, selectedIDs));
-           };
-
-
-           operation.available = function() {
-               return nodes.length >= 2;
-           };
-
-
-           operation.disabled = function() {
-
-               if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-                   return 'too_large';
-               } else if (someMissing()) {
-                   return 'not_downloaded';
-               } else if (selectedIDs.some(context.hasHiddenConnections)) {
-                   return 'connected_to_hidden';
-               } else if (selectedIDs.some(incompleteRelation)) {
-                   return 'incomplete_relation';
-               }
-
-               return false;
-
-
-               function someMissing() {
-                   if (context.inIntro()) { return false; }
-                   var osm = context.connection();
-                   if (osm) {
-                       var missing = coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-                       if (missing.length) {
-                           missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-                           return true;
-                       }
-                   }
-                   return false;
-               }
-
-               function incompleteRelation(id) {
-                   var entity = context.entity(id);
-                   return entity.type === 'relation' && !entity.isComplete(context.graph());
-               }
-           };
-
-
-           operation.tooltip = function() {
-               var disable = operation.disabled();
-               return disable ?
-                   _t('operations.rotate.' + disable + '.' + multi) :
-                   _t('operations.rotate.description.' + multi);
-           };
-
-
-           operation.annotation = function() {
-               return selectedIDs.length === 1 ?
-                   _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) :
-                   _t('operations.rotate.annotation.multiple');
-           };
-
+       var levels = ["subterritory", "territory", "subcountryGroup", "country", "sharedLandform", "intermediateRegion", "subregion", "region", "subunion", "union", "unitedNations", "world"];
+       loadDerivedDataAndCaches(borders);

 
 

-           operation.id = 'rotate';
-           operation.keys = [_t('operations.rotate.key')];
-           operation.title = _t('operations.rotate.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+       function loadDerivedDataAndCaches(borders2) {
+         var identifierProps = ["iso1A2", "iso1A3", "m49", "wikidata", "emojiFlag", "ccTLD", "nameEn"];
+         var geometryFeatures = [];

 
 

-           operation.mouseOnly = true;
+         for (var i in borders2.features) {
+           var feature2 = borders2.features[i];
+           feature2.properties.id = feature2.properties.iso1A2 || feature2.properties.m49 || feature2.properties.wikidata;
+           loadM49(feature2);
+           loadTLD(feature2);
+           loadIsoStatus(feature2);
+           loadLevel(feature2);
+           loadGroups(feature2);
+           loadFlag(feature2);
+           cacheFeatureByIDs(feature2);
+           if (feature2.geometry) geometryFeatures.push(feature2);
+         }
+
+         for (var _i in borders2.features) {
+           var _feature = borders2.features[_i];
+           _feature.properties.groups = _feature.properties.groups.map(function (groupID) {
+             return featuresByCode[groupID].properties.id;
+           });
+           loadMembersForGroupsOf(_feature);
+         }

 
 

-           return operation;
-       }
+         for (var _i2 in borders2.features) {
+           var _feature2 = borders2.features[_i2];
+           loadRoadSpeedUnit(_feature2);
+           loadRoadHeightUnit(_feature2);
+           loadDriveSide(_feature2);
+           loadCallingCodes(_feature2);
+           loadGroupGroups(_feature2);
+         }

 
 

-       function modeMove(context, entityIDs, baseGraph) {
-           var mode = {
-               id: 'move',
-               button: 'browse'
-           };
+         for (var _i3 in borders2.features) {
+           var _feature3 = borders2.features[_i3];

 
 

-           var keybinding = utilKeybinding('move');
-           var behaviors = [
-               behaviorEdit(context),
-               operationCircularize(context, entityIDs).behavior,
-               operationDelete(context, entityIDs).behavior,
-               operationOrthogonalize(context, entityIDs).behavior,
-               operationReflectLong(context, entityIDs).behavior,
-               operationReflectShort(context, entityIDs).behavior,
-               operationRotate(context, entityIDs).behavior
-           ];
-           var annotation = entityIDs.length === 1 ?
-               _t('operations.move.annotation.' + context.graph().geometry(entityIDs[0])) :
-               _t('operations.move.annotation.multiple');
+           _feature3.properties.groups.sort(function (groupID1, groupID2) {
+             return levels.indexOf(featuresByCode[groupID1].properties.level) - levels.indexOf(featuresByCode[groupID2].properties.level);
+           });

 
 

-           var _prevGraph;
-           var _cache;
-           var _origin;
-           var _nudgeInterval;
+           if (_feature3.properties.members) _feature3.properties.members.sort(function (id1, id2) {
+             var diff = levels.indexOf(featuresByCode[id1].properties.level) - levels.indexOf(featuresByCode[id2].properties.level);

 
 

+             if (diff === 0) {
+               return borders2.features.indexOf(featuresByCode[id1]) - borders2.features.indexOf(featuresByCode[id2]);
+             }

 
 

-           function doMove(nudge) {
-               nudge = nudge || [0, 0];
+             return diff;
+           });
+         }

 
 

-               var fn;
-               if (_prevGraph !== context.graph()) {
-                   _cache = {};
-                   _origin = context.map().mouseCoordinates();
-                   fn = context.perform;
-               } else {
-                   fn = context.overwrite;
-               }
+         var geometryOnlyCollection = {
+           type: "FeatureCollection",
+           features: geometryFeatures
+         };
+         whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);

 
 

-               var currMouse = context.map().mouse();
-               var origMouse = context.projection(_origin);
-               var delta = geoVecSubtract(geoVecSubtract(currMouse, origMouse), nudge);
+         function loadGroups(feature2) {
+           var props = feature2.properties;

 
 

-               fn(actionMove(entityIDs, delta, context.projection, _cache));
-               _prevGraph = context.graph();
+           if (!props.groups) {
+             props.groups = [];

            }
 
            }
 

-
-           function startNudge(nudge) {
-               if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-               _nudgeInterval = window.setInterval(function() {
-                   context.map().pan(nudge);
-                   doMove(nudge);
-               }, 50);
+           if (feature2.geometry && props.country) {
+             props.groups.push(props.country);

            }
 
            }
 

-
-           function stopNudge() {
-               if (_nudgeInterval) {
-                   window.clearInterval(_nudgeInterval);
-                   _nudgeInterval = null;
-               }
+           if (props.m49 !== "001") {
+             props.groups.push("001");

            }
            }

+         }

 
 

+         function loadM49(feature2) {
+           var props = feature2.properties;

 
 

-           function move() {
-               doMove();
-               var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
-               if (nudge) {
-                   startNudge(nudge);
-               } else {
-                   stopNudge();
-               }
+           if (!props.m49 && props.iso1N3) {
+             props.m49 = props.iso1N3;

            }
            }

+         }

 
 

+         function loadTLD(feature2) {
+           var props = feature2.properties;
+           if (props.level === "unitedNations") return;

 
 

-           function finish() {
-               event.stopPropagation();
-               context.replace(actionNoop(), annotation);
-               context.enter(modeSelect(context, entityIDs));
-               stopNudge();
+           if (!props.ccTLD && props.iso1A2) {
+             props.ccTLD = "." + props.iso1A2.toLowerCase();

            }
            }

+         }

 
 

+         function loadIsoStatus(feature2) {
+           var props = feature2.properties;

 
 

-           function cancel() {
-               if (baseGraph) {
-                   while (context.graph() !== baseGraph) { context.pop(); }
-                   context.enter(modeBrowse(context));
-               } else {
-                   context.pop();
-                   context.enter(modeSelect(context, entityIDs));
-               }
-               stopNudge();
+           if (!props.isoStatus && props.iso1A2) {
+             props.isoStatus = "official";

            }
            }

+         }

 
 

+         function loadLevel(feature2) {
+           var props = feature2.properties;
+           if (props.level) return;

 
 

-           function undone() {
-               context.enter(modeBrowse(context));
+           if (!props.country) {
+             props.level = "country";
+           } else if (!props.iso1A2 || props.isoStatus === "official") {
+             props.level = "territory";
+           } else {
+             props.level = "subterritory";

            }
            }

+         }

 
 

+         function loadGroupGroups(feature2) {
+           var props = feature2.properties;
+           if (feature2.geometry || !props.members) return;
+           var featureLevelIndex = levels.indexOf(props.level);
+           var sharedGroups = [];

 
 

-           mode.enter = function() {
-               _origin = context.map().mouseCoordinates();
-               _prevGraph = null;
-               _cache = {};
-
-               context.features().forceVisible(entityIDs);
-
-               behaviors.forEach(context.install);
-
-               context.surface()
-                   .on('mousemove.move', move)
-                   .on('click.move', finish);
-
-               context.history()
-                   .on('undone.move', undone);
-
-               keybinding
-                   .on('⎋', cancel)
-                   .on('↩', finish);
-
-               select(document)
-                   .call(keybinding);
-           };
-
-
-           mode.exit = function() {
-               stopNudge();
+           var _loop = function _loop(_i4) {
+             var memberID = props.members[_i4];
+             var member = featuresByCode[memberID];
+             var memberGroups = member.properties.groups.filter(function (groupID) {
+               return groupID !== feature2.properties.id && featureLevelIndex < levels.indexOf(featuresByCode[groupID].properties.level);
+             });

 
 

-               behaviors.forEach(function(behavior) {
-                   context.uninstall(behavior);
+             if (_i4 === "0") {
+               sharedGroups = memberGroups;
+             } else {
+               sharedGroups = sharedGroups.filter(function (groupID) {
+                 return memberGroups.indexOf(groupID) !== -1;

                });
                });

-
-               context.surface()
-                   .on('mousemove.move', null)
-                   .on('click.move', null);
-
-               context.history()
-                   .on('undone.move', null);
-
-               select(document)
-                   .call(keybinding.unbind);
-
-               context.features().forceVisible([]);
-           };
-
-
-           mode.selectedIDs = function() {
-               if (!arguments.length) { return entityIDs; }
-               // no assign
-               return mode;
+             }

            };
 
            };
 

+           for (var _i4 in props.members) {
+             _loop(_i4);
+           }

 
 

-           return mode;
-       }
-
-       // see also `operationPaste`
-       function behaviorPaste(context) {
+           props.groups = props.groups.concat(sharedGroups.filter(function (groupID) {
+             return props.groups.indexOf(groupID) === -1;
+           }));

 
 

-           function doPaste() {
-               // prevent paste during low zoom selection
-               if (!context.map().withinEditableZoom()) { return; }
+           for (var j in sharedGroups) {
+             var groupFeature = featuresByCode[sharedGroups[j]];

 
 

-               event.preventDefault();
+             if (groupFeature.properties.members.indexOf(props.id) === -1) {
+               groupFeature.properties.members.push(props.id);
+             }
+           }
+         }

 
 

-               var baseGraph = context.graph();
-               var mouse = context.map().mouse();
-               var projection = context.projection;
-               var viewport = geoExtent(projection.clipExtent()).polygon();
+         function loadRoadSpeedUnit(feature2) {
+           var props = feature2.properties;

 
 

-               if (!geoPointInPolygon(mouse, viewport)) { return; }
+           if (feature2.geometry) {
+             if (!props.roadSpeedUnit) props.roadSpeedUnit = "km/h";
+           } else if (props.members) {
+             var vals = Array.from(new Set(props.members.map(function (id) {
+               var member = featuresByCode[id];
+               if (member.geometry) return member.properties.roadSpeedUnit || "km/h";
+             }).filter(Boolean)));
+             if (vals.length === 1) props.roadSpeedUnit = vals[0];
+           }
+         }

 
 

-               var oldIDs = context.copyIDs();
-               if (!oldIDs.length) { return; }
+         function loadRoadHeightUnit(feature2) {
+           var props = feature2.properties;

 
 

-               var extent = geoExtent();
-               var oldGraph = context.copyGraph();
-               var newIDs = [];
+           if (feature2.geometry) {
+             if (!props.roadHeightUnit) props.roadHeightUnit = "m";
+           } else if (props.members) {
+             var vals = Array.from(new Set(props.members.map(function (id) {
+               var member = featuresByCode[id];
+               if (member.geometry) return member.properties.roadHeightUnit || "m";
+             }).filter(Boolean)));
+             if (vals.length === 1) props.roadHeightUnit = vals[0];
+           }
+         }

 
 

-               var action = actionCopyEntities(oldIDs, oldGraph);
-               context.perform(action);
+         function loadDriveSide(feature2) {
+           var props = feature2.properties;

 
 

-               var copies = action.copies();
-               var originals = new Set();
-               Object.values(copies).forEach(function(entity) { originals.add(entity.id); });
+           if (feature2.geometry) {
+             if (!props.driveSide) props.driveSide = "right";
+           } else if (props.members) {
+             var vals = Array.from(new Set(props.members.map(function (id) {
+               var member = featuresByCode[id];
+               if (member.geometry) return member.properties.driveSide || "right";
+             }).filter(Boolean)));
+             if (vals.length === 1) props.driveSide = vals[0];
+           }
+         }

 
 

-               for (var id in copies) {
-                   var oldEntity = oldGraph.entity(id);
-                   var newEntity = copies[id];
+         function loadCallingCodes(feature2) {
+           var props = feature2.properties;

 
 

-                   extent._extend(oldEntity.extent(oldGraph));
+           if (!feature2.geometry && props.members) {
+             props.callingCodes = Array.from(new Set(props.members.reduce(function (array, id) {
+               var member = featuresByCode[id];
+               if (member.geometry && member.properties.callingCodes) return array.concat(member.properties.callingCodes);
+               return array;
+             }, [])));
+           }
+         }

 
 

-                   // Exclude child nodes from newIDs if their parent way was also copied.
-                   var parents = context.graph().parentWays(newEntity);
-                   var parentCopied = parents.some(function(parent) {
-                       return originals.has(parent.id);
-                   });
+         function loadFlag(feature2) {
+           if (!feature2.properties.iso1A2) return;
+           var flag = feature2.properties.iso1A2.replace(/./g, function (_char) {
+             return String.fromCodePoint(_char.charCodeAt(0) + 127397);
+           });
+           feature2.properties.emojiFlag = flag;
+         }

 
 

-                   if (!parentCopied) {
-                       newIDs.push(newEntity.id);
-                   }
-               }
+         function loadMembersForGroupsOf(feature2) {
+           for (var j in feature2.properties.groups) {
+             var groupID = feature2.properties.groups[j];
+             var groupFeature = featuresByCode[groupID];
+             if (!groupFeature.properties.members) groupFeature.properties.members = [];
+             groupFeature.properties.members.push(feature2.properties.id);
+           }
+         }

 
 

-               // Put pasted objects where mouse pointer is..
-               var copyPoint = (context.copyLonLat() && projection(context.copyLonLat())) || projection(extent.center());
-               var delta = geoVecSubtract(mouse, copyPoint);
+         function cacheFeatureByIDs(feature2) {
+           var ids = [];

 
 

-               context.perform(actionMove(newIDs, delta, projection));
-               context.enter(modeMove(context, newIDs, baseGraph));
+           for (var k in identifierProps) {
+             var prop = identifierProps[k];
+             var id = feature2.properties[prop];
+             if (id) ids.push(id);

            }
 
            }
 

-
-           function behavior() {
-               context.keybinding().on(uiCmd('⌘V'), doPaste);
-               return behavior;
+           if (feature2.properties.aliases) {
+             for (var j in feature2.properties.aliases) {
+               ids.push(feature2.properties.aliases[j]);
+             }

            }
 
            }
 

+           for (var _i5 in ids) {
+             var _id = canonicalID(ids[_i5]);

 
 

-           behavior.off = function() {
-               context.keybinding().off(uiCmd('⌘V'));
-           };
+             featuresByCode[_id] = feature2;
+           }
+         }
+       }

 
 

+       function locArray(loc) {
+         if (Array.isArray(loc)) {
+           return loc;
+         } else if (loc.coordinates) {
+           return loc.coordinates;
+         }

 
 

-           return behavior;
+         return loc.geometry.coordinates;

        }
 
        }
 

-       /*
-           `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
-
-           * The `origin` function is expected to return an [x, y] tuple rather than an
-             {x, y} object.
-           * The events are `start`, `move`, and `end`.
-             (https://github.com/mbostock/d3/issues/563)
-           * The `start` event is not dispatched until the first cursor movement occurs.
-             (https://github.com/mbostock/d3/pull/368)
-           * The `move` event has a `point` and `delta` [x, y] tuple properties rather
-             than `x`, `y`, `dx`, and `dy` properties.
-           * The `end` event is not dispatched if no movement occurs.
-           * An `off` function is available that unbinds the drag's internal event handlers.
-        */
+       function smallestFeature(loc) {
+         var query = locArray(loc);
+         var featureProperties = whichPolygonGetter(query);
+         if (!featureProperties) return null;
+         return featuresByCode[featureProperties.id];
+       }

 
 

-       function behaviorDrag() {
-           var dispatch$1 = dispatch('start', 'move', 'end');
-
-           // see also behaviorSelect
-           var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
-           var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
-
-           var _origin = null;
-           var _selector = '';
-           var _event;
-           var _target;
-           var _surface;
-           var _pointerId;
-
-           // use pointer events on supported platforms; fallback to mouse events
-           var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-           var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
-           var d3_event_userSelectSuppress = function() {
-                   var selection$1 = selection();
-                   var select = selection$1.style(d3_event_userSelectProperty);
-                   selection$1.style(d3_event_userSelectProperty, 'none');
-                   return function() {
-                       selection$1.style(d3_event_userSelectProperty, select);
-                   };
-               };
+       function countryFeature(loc) {
+         var feature2 = smallestFeature(loc);
+         if (!feature2) return null;
+         var countryCode = feature2.properties.country || feature2.properties.iso1A2;
+         return featuresByCode[countryCode] || null;
+       }

 
 

+       var defaultOpts = {
+         level: void 0,
+         maxLevel: void 0,
+         withProp: void 0
+       };

 
 

-           function eventOf(thiz, argumentz) {
-               return function(e1) {
-                   e1.target = behavior;
-                   customEvent(e1, dispatch$1.apply, dispatch$1, [e1.type, thiz, argumentz]);
-               };
+       function featureForLoc(loc, opts) {
+         var targetLevel = opts.level || "country";
+         var maxLevel = opts.maxLevel || "world";
+         var withProp = opts.withProp;
+         var targetLevelIndex = levels.indexOf(targetLevel);
+         if (targetLevelIndex === -1) return null;
+         var maxLevelIndex = levels.indexOf(maxLevel);
+         if (maxLevelIndex === -1) return null;
+         if (maxLevelIndex < targetLevelIndex) return null;
+
+         if (targetLevel === "country") {
+           var fastFeature = countryFeature(loc);
+
+           if (fastFeature) {
+             if (!withProp || fastFeature.properties[withProp]) {
+               return fastFeature;
+             }

            }
            }

+         }

 
 

+         var features2 = featuresContaining(loc);

 
 

-           function pointerdown() {
-
-               if (_pointerId) { return; }
-
-               _pointerId = event.pointerId || 'mouse';
-
-               _target = this;
-               _event = eventOf(_target, arguments);
+         for (var i in features2) {
+           var feature2 = features2[i];
+           var levelIndex = levels.indexOf(feature2.properties.level);

 
 

-               // only force reflow once per drag
-               var pointerLocGetter = utilFastMouse(_surface || _target.parentNode);
+           if (feature2.properties.level === targetLevel || levelIndex > targetLevelIndex && levelIndex <= maxLevelIndex) {
+             if (!withProp || feature2.properties[withProp]) {
+               return feature2;
+             }
+           }
+         }

 
 

-               var offset;
-               var startOrigin = pointerLocGetter(event);
-               var started = false;
-               var selectEnable = d3_event_userSelectSuppress();
+         return null;
+       }

 
 

-               select(window)
-                   .on(_pointerPrefix + 'move.drag', pointermove)
-                   .on(_pointerPrefix + 'up.drag pointercancel.drag', pointerup, true);
+       function featureForID(id) {
+         var stringID;

 
 

-               if (_origin) {
-                   offset = _origin.apply(_target, arguments);
-                   offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
-               } else {
-                   offset = [0, 0];
-               }
+         if (typeof id === "number") {
+           stringID = id.toString();

 
 

-               event.stopPropagation();
+           if (stringID.length === 1) {
+             stringID = "00" + stringID;
+           } else if (stringID.length === 2) {
+             stringID = "0" + stringID;
+           }
+         } else {
+           stringID = canonicalID(id);
+         }

 
 

+         return featuresByCode[stringID] || null;
+       }

 
 

-               function pointermove() {
-                   if (_pointerId !== (event.pointerId || 'mouse')) { return; }
+       function smallestFeaturesForBbox(bbox) {
+         return whichPolygonGetter.bbox(bbox).map(function (props) {
+           return featuresByCode[props.id];
+         });
+       }

 
 

-                   var p = pointerLocGetter(event);
+       function smallestOrMatchingFeature(query) {
+         if (_typeof(query) === "object") {
+           return smallestFeature(query);
+         }

 
 

-                   if (!started) {
-                       var dist = geoVecLength(startOrigin,  p);
-                       var tolerance = event.pointerType === 'pen' ? _penTolerancePx : _tolerancePx;
-                       // don't start until the drag has actually moved somewhat
-                       if (dist < tolerance) { return; }
+         return featureForID(query);
+       }

 
 

-                       started = true;
-                       _event({ type: 'start' });
+       function feature$1(query) {
+         var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOpts;

 
 

-                   // Don't send a `move` event in the same cycle as `start` since dragging
-                   // a midpoint will convert the target to a node.
-                   } else {
+         if (_typeof(query) === "object") {
+           return featureForLoc(query, opts);
+         }

 
 

-                       startOrigin = p;
-                       event.stopPropagation();
-                       event.preventDefault();
+         return featureForID(query);
+       }

 
 

-                       var dx = p[0] - startOrigin[0];
-                       var dy = p[1] - startOrigin[1];
-                       _event({
-                           type: 'move',
-                           point: [p[0] + offset[0],  p[1] + offset[1]],
-                           delta: [dx, dy]
-                       });
-                   }
-               }
+       function iso1A2Code(query) {
+         var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOpts;
+         opts.withProp = "iso1A2";
+         var match = feature$1(query, opts);
+         if (!match) return null;
+         return match.properties.iso1A2 || null;
+       }

 
 

+       function featuresContaining(query, strict) {
+         var matchingFeatures;

 
 

-               function pointerup() {
-                   if (_pointerId !== (event.pointerId || 'mouse')) { return; }
+         if (Array.isArray(query) && query.length === 4) {
+           matchingFeatures = smallestFeaturesForBbox(query);
+         } else {
+           var smallestOrMatching = smallestOrMatchingFeature(query);
+           matchingFeatures = smallestOrMatching ? [smallestOrMatching] : [];
+         }

 
 

-                   _pointerId = null;
+         if (!matchingFeatures.length) return [];
+         var returnFeatures;

 
 

-                   if (started) {
-                       _event({ type: 'end' });
+         if (!strict || _typeof(query) === "object") {
+           returnFeatures = matchingFeatures.slice();
+         } else {
+           returnFeatures = [];
+         }

 
 

-                       event.preventDefault();
-                   }
+         for (var j in matchingFeatures) {
+           var properties = matchingFeatures[j].properties;

 
 

-                   select(window)
-                       .on(_pointerPrefix + 'move.drag', null)
-                       .on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+           for (var i in properties.groups) {
+             var groupID = properties.groups[i];
+             var groupFeature = featuresByCode[groupID];

 
 

-                   selectEnable();
-               }
+             if (returnFeatures.indexOf(groupFeature) === -1) {
+               returnFeatures.push(groupFeature);
+             }

            }
            }

+         }

 
 

+         return returnFeatures;
+       }

 
 

-           function behavior(selection) {
-               _pointerId = null;
-               var matchesSelector = utilPrefixDOMProperty('matchesSelector');
-               var delegate = pointerdown;
-
-               if (_selector) {
-                   delegate = function() {
-                       var root = this;
-                       var target = event.target;
-                       for (; target && target !== root; target = target.parentNode) {
-                           var datum = target.__data__;
+       function featuresIn(id, strict) {
+         var feature2 = featureForID(id);
+         if (!feature2) return [];
+         var features2 = [];

 
 

-                           var entity = datum instanceof osmNote ? datum
-                               : datum && datum.properties && datum.properties.entity;
+         if (!strict) {
+           features2.push(feature2);
+         }

 
 

-                           if (entity && target[matchesSelector](_selector)) {
-                               return pointerdown.call(target, entity);
-                           }
-                       }
-                   };
-               }
+         var properties = feature2.properties;

 
 

-               selection
-                   .on(_pointerPrefix + 'down.drag' + _selector, delegate);
+         if (properties.members) {
+           for (var i in properties.members) {
+             var memberID = properties.members[i];
+             features2.push(featuresByCode[memberID]);

            }
            }

+         }

 
 

-
-           behavior.off = function(selection) {
-               selection
-                   .on(_pointerPrefix + 'down.drag' + _selector, null);
-           };
-
-
-           behavior.selector = function(_) {
-               if (!arguments.length) { return _selector; }
-               _selector = _;
-               return behavior;
-           };
-
-
-           behavior.origin = function(_) {
-               if (!arguments.length) { return _origin; }
-               _origin = _;
-               return behavior;
-           };
-
-
-           behavior.cancel = function() {
-               select(window)
-                   .on(_pointerPrefix + 'move.drag', null)
-                   .on(_pointerPrefix + 'up.drag pointercancel.drag', null);
-               return behavior;
-           };
-
-
-           behavior.target = function() {
-               if (!arguments.length) { return _target; }
-               _target = arguments[0];
-               _event = eventOf(_target, Array.prototype.slice.call(arguments, 1));
-               return behavior;
-           };
-
-
-           behavior.surface = function() {
-               if (!arguments.length) { return _surface; }
-               _surface = arguments[0];
-               return behavior;
-           };
-
-
-           return utilRebind(behavior, dispatch$1, 'on');
+         return features2;

        }
 
        }
 

-       function modeDragNode(context) {
-           var mode = {
-               id: 'drag-node',
-               button: 'browse'
-           };
-           var hover = behaviorHover(context).altDisables(true)
-               .on('hover', context.ui().sidebar.hover);
-           var edit = behaviorEdit(context);
-
-           var _nudgeInterval;
-           var _restoreSelectedIDs = [];
-           var _wasMidpoint = false;
-           var _isCancelled = false;
-           var _activeEntity;
-           var _startLoc;
-           var _lastLoc;
-
-
-           function startNudge(entity, nudge) {
-               if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-               _nudgeInterval = window.setInterval(function() {
-                   context.map().pan(nudge);
-                   doMove(entity, nudge);
-               }, 50);
-           }
+       function aggregateFeature(id) {
+         var features2 = featuresIn(id, false);
+         if (features2.length === 0) return null;
+         var aggregateCoordinates = [];

 
 

+         for (var i in features2) {
+           var feature2 = features2[i];

 
 

-           function stopNudge() {
-               if (_nudgeInterval) {
-                   window.clearInterval(_nudgeInterval);
-                   _nudgeInterval = null;
-               }
+           if (feature2.geometry && feature2.geometry.type === "MultiPolygon" && feature2.geometry.coordinates) {
+             aggregateCoordinates = aggregateCoordinates.concat(feature2.geometry.coordinates);

            }
            }

+         }

 
 

-
-           function moveAnnotation(entity) {
-               return _t('operations.move.annotation.' + entity.geometry(context.graph()));
+         return {
+           type: "Feature",
+           properties: features2[0].properties,
+           geometry: {
+             type: "MultiPolygon",
+             coordinates: aggregateCoordinates

            }
            }

+         };
+       }

 
 

+       function roadSpeedUnit(query) {
+         var feature2 = smallestOrMatchingFeature(query);
+         return feature2 && feature2.properties.roadSpeedUnit || null;
+       }

 
 

-           function connectAnnotation(nodeEntity, targetEntity) {
-               var nodeGeometry = nodeEntity.geometry(context.graph());
-               var targetGeometry = targetEntity.geometry(context.graph());
-               if (nodeGeometry === 'vertex' && targetGeometry === 'vertex') {
-                   var nodeParentWayIDs = context.graph().parentWays(nodeEntity);
-                   var targetParentWayIDs = context.graph().parentWays(targetEntity);
-                   var sharedParentWays = utilArrayIntersection(nodeParentWayIDs, targetParentWayIDs);
-                   // if both vertices are part of the same way
-                   if (sharedParentWays.length !== 0) {
-                       // if the nodes are next to each other, they are merged
-                       if (sharedParentWays[0].areAdjacent(nodeEntity.id, targetEntity.id)) {
-                           return _t('operations.connect.annotation.from_vertex.to_adjacent_vertex');
-                       }
-                       return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
-                   }
-               }
-               return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
-           }
-
+       function roadHeightUnit(query) {
+         var feature2 = smallestOrMatchingFeature(query);
+         return feature2 && feature2.properties.roadHeightUnit || null;
+       }

 
 

-           function shouldSnapToNode(target) {
-               if (!_activeEntity) { return false; }
-               return _activeEntity.geometry(context.graph()) !== 'vertex' ||
-                   (target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph()));
-           }
+       var geojsonArea = {};

 
 

+       var wgs84$1 = {};

 
 

-           function origin(entity) {
-               return context.projection(entity.loc);
-           }
+       wgs84$1.RADIUS = 6378137;
+       wgs84$1.FLATTENING = 1 / 298.257223563;
+       wgs84$1.POLAR_RADIUS = 6356752.3142;

 
 

+       var wgs84 = wgs84$1;
+       geojsonArea.geometry = geometry;
+       geojsonArea.ring = ringArea;

 
 

-           function keydown() {
-               if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-                   if (context.surface().classed('nope')) {
-                       context.surface()
-                           .classed('nope-suppressed', true);
-                   }
-                   context.surface()
-                       .classed('nope', false)
-                       .classed('nope-disabled', true);
-               }
-           }
+       function geometry(_) {
+         var area = 0,
+             i;

 
 

+         switch (_.type) {
+           case 'Polygon':
+             return polygonArea(_.coordinates);

 
 

-           function keyup() {
-               if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-                   if (context.surface().classed('nope-suppressed')) {
-                       context.surface()
-                           .classed('nope', true);
-                   }
-                   context.surface()
-                       .classed('nope-suppressed', false)
-                       .classed('nope-disabled', false);
-               }
-           }
+           case 'MultiPolygon':
+             for (i = 0; i < _.coordinates.length; i++) {
+               area += polygonArea(_.coordinates[i]);
+             }

 
 

+             return area;

 
 

-           function start(entity) {
-               _wasMidpoint = entity.type === 'midpoint';
-               var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
-               _isCancelled = !context.editable() || event.sourceEvent.shiftKey || hasHidden;
+           case 'Point':
+           case 'MultiPoint':
+           case 'LineString':
+           case 'MultiLineString':
+             return 0;

 
 

+           case 'GeometryCollection':
+             for (i = 0; i < _.geometries.length; i++) {
+               area += geometry(_.geometries[i]);
+             }

 
 

-               if (_isCancelled) {
-                   if (hasHidden) {
-                       context.ui().flash
-                           .duration(4000)
-                           .text(_t('modes.drag_node.connected_to_hidden'))();
-                   }
-                   return drag.cancel();
-               }
+             return area;
+         }
+       }

 
 

-               if (_wasMidpoint) {
-                   var midpoint = entity;
-                   entity = osmNode();
-                   context.perform(actionAddMidpoint(midpoint, entity));
-                   entity = context.entity(entity.id);   // get post-action entity
+       function polygonArea(coords) {
+         var area = 0;

 
 

-                   var vertex = context.surface().selectAll('.' + entity.id);
-                   drag.target(vertex.node(), entity);
+         if (coords && coords.length > 0) {
+           area += Math.abs(ringArea(coords[0]));

 
 

-               } else {
-                   context.perform(actionNoop());
-               }
+           for (var i = 1; i < coords.length; i++) {
+             area -= Math.abs(ringArea(coords[i]));
+           }
+         }

 
 

-               _activeEntity = entity;
-               _startLoc = entity.loc;
+         return area;
+       }
+       /**
+        * Calculate the approximate area of the polygon were it projected onto
+        *     the earth.  Note that this area will be positive if ring is oriented
+        *     clockwise, otherwise it will be negative.
+        *
+        * Reference:
+        * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
+        *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
+        *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
+        *
+        * Returns:
+        * {float} The approximate signed geodesic area of the polygon in square
+        *     meters.
+        */

 
 

-               hover.ignoreVertex(entity.geometry(context.graph()) === 'vertex');

 
 

-               context.surface().selectAll('.' + _activeEntity.id)
-                   .classed('active', true);
+       function ringArea(coords) {
+         var p1,
+             p2,
+             p3,
+             lowerIndex,
+             middleIndex,
+             upperIndex,
+             i,
+             area = 0,
+             coordsLength = coords.length;
+
+         if (coordsLength > 2) {
+           for (i = 0; i < coordsLength; i++) {
+             if (i === coordsLength - 2) {
+               // i = N-2
+               lowerIndex = coordsLength - 2;
+               middleIndex = coordsLength - 1;
+               upperIndex = 0;
+             } else if (i === coordsLength - 1) {
+               // i = N-1
+               lowerIndex = coordsLength - 1;
+               middleIndex = 0;
+               upperIndex = 1;
+             } else {
+               // i = 0 to N-3
+               lowerIndex = i;
+               middleIndex = i + 1;
+               upperIndex = i + 2;
+             }

 
 

-               context.enter(mode);
+             p1 = coords[lowerIndex];
+             p2 = coords[middleIndex];
+             p3 = coords[upperIndex];
+             area += (rad(p3[0]) - rad(p1[0])) * Math.sin(rad(p2[1]));

            }
 
            }
 

+           area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
+         }

 
 

-           // related code
-           // - `behavior/draw.js` `datum()`
-           function datum() {
-               var event$1 = event && event.sourceEvent;
-               if (!event$1 || event$1.altKey) {
-                   return {};
-               } else {
-                   // When dragging, snap only to touch targets..
-                   // (this excludes area fills and active drawing elements)
-                   var d = event$1.target.__data__;
-                   return (d && d.properties && d.properties.target) ? d : {};
-               }
-           }
-
+         return area;
+       }

 
 

-           function doMove(entity, nudge) {
-               nudge = nudge || [0, 0];
+       function rad(_) {
+         return _ * Math.PI / 180;
+       }

 
 

-               var currPoint = (event && event.point) || context.projection(_lastLoc);
-               var currMouse = geoVecSubtract(currPoint, nudge);
-               var loc = context.projection.invert(currMouse);
+       var inputValidation = {};

 
 

-               if (!_nudgeInterval) {   // If not nudging at the edge of the viewport, try to snap..
-                   // related code
-                   // - `mode/drag_node.js`     `doMove()`
-                   // - `behavior/draw.js`      `click()`
-                   // - `behavior/draw_way.js`  `move()`
-                   var d = datum();
-                   var target = d && d.properties && d.properties.entity;
-                   var targetLoc = target && target.loc;
-                   var targetNodes = d && d.properties && d.properties.nodes;
-                   var edge;
+       var $$g = _export;
+       var $includes = arrayIncludes.includes;
+       var addToUnscopables$1 = addToUnscopables$5;

 
 

-                   if (targetLoc) {   // snap to node/vertex - a point target with `.loc`
-                       if (shouldSnapToNode(target)) {
-                           loc = targetLoc;
-                       }
+       // `Array.prototype.includes` method
+       // https://tc39.es/ecma262/#sec-array.prototype.includes
+       $$g({ target: 'Array', proto: true }, {
+         includes: function includes(el /* , fromIndex = 0 */) {
+           return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });

 
 

-                   } else if (targetNodes) {   // snap to way - a line target with `.nodes`
-                       edge = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, end.id);
-                       if (edge) {
-                           loc = edge.loc;
-                       }
-                   }
-               }
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables$1('includes');

 
 

-               context.replace(
-                   actionMoveNode(entity.id, loc)
-               );
+       var validateCenter$1 = {};

 
 

-               // Below here: validations
-               var isInvalid = false;
+       validateCenter$1.validateCenter = function validateCenter(center) {
+         var validCenterLengths = [2, 3];

 
 

-               // Check if this connection to `target` could cause relations to break..
-               if (target) {
-                   isInvalid = hasRelationConflict(entity, target, edge, context.graph());
-               }
+         if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
+           throw new Error("ERROR! Center has to be an array of length two or three");
+         }

 
 

-               // Check if this drag causes the geometry to break..
-               if (!isInvalid) {
-                   isInvalid = hasInvalidGeometry(entity, context.graph());
-               }
+         var _center = _slicedToArray(center, 2),
+             lng = _center[0],
+             lat = _center[1];

 
 

+         if (typeof lng !== "number" || typeof lat !== "number") {
+           throw new Error("ERROR! Longitude and Latitude has to be numbers but where ".concat(_typeof(lng), " and ").concat(_typeof(lat)));
+         }

 
 

-               var nope = context.surface().classed('nope');
-               if (isInvalid === 'relation' || isInvalid === 'restriction') {
-                   if (!nope) {   // about to nope - show hint
-                       context.ui().flash
-                           .duration(4000)
-                           .text(_t('operations.connect.' + isInvalid,
-                               { relation: _mainPresetIndex.item('type/restriction').name() }
-                           ))();
-                   }
-               } else if (isInvalid) {
-                   var errorID = isInvalid === 'line' ? 'lines' : 'areas';
-                   context.ui().flash
-                       .duration(3000)
-                       .text(_t('self_intersection.error.' + errorID))();
-               } else {
-                   if (nope) {   // about to un-nope, remove hint
-                       context.ui().flash
-                           .duration(1)
-                           .text('')();
-                   }
-               }
+         if (lng > 180 || lng < -180) {
+           throw new Error("ERROR! Longitude has to be between -180 and 180 but was ".concat(lng));
+         }

 
 

+         if (lat > 90 || lat < -90) {
+           throw new Error("ERROR! Latitude has to be between -90 and 90 but was ".concat(lat));
+         }
+       };

 
 

-               var nopeDisabled = context.surface().classed('nope-disabled');
-               if (nopeDisabled) {
-                   context.surface()
-                       .classed('nope', false)
-                       .classed('nope-suppressed', isInvalid);
-               } else {
-                   context.surface()
-                       .classed('nope', isInvalid)
-                       .classed('nope-suppressed', false);
-               }
+       var validateRadius$1 = {};

 
 

-               _lastLoc = loc;
-           }
+       validateRadius$1.validateRadius = function validateRadius(radius) {
+         if (typeof radius !== "number") {
+           throw new Error("ERROR! Radius has to be a positive number but was: ".concat(_typeof(radius)));
+         }

 
 

+         if (radius <= 0) {
+           throw new Error("ERROR! Radius has to be a positive number but was: ".concat(radius));
+         }
+       };

 
 

-           // Uses `actionConnect.disabled()` to know whether this connection is ok..
-           function hasRelationConflict(entity, target, edge, graph) {
-               var testGraph = graph.update();  // copy
+       var validateNumberOfEdges$1 = {};

 
 

-               // if snapping to way - add midpoint there and consider that the target..
-               if (edge) {
-                   var midpoint = osmNode();
-                   var action = actionAddMidpoint({
-                       loc: edge.loc,
-                       edge: [target.nodes[edge.index - 1], target.nodes[edge.index]]
-                   }, midpoint);
+       validateNumberOfEdges$1.validateNumberOfEdges = function validateNumberOfEdges(numberOfEdges) {
+         if (typeof numberOfEdges !== "number") {
+           var ARGUMENT_TYPE = Array.isArray(numberOfEdges) ? "array" : _typeof(numberOfEdges);
+           throw new Error("ERROR! Number of edges has to be a number but was: ".concat(ARGUMENT_TYPE));
+         }

 
 

-                   testGraph = action(testGraph);
-                   target = midpoint;
-               }
+         if (numberOfEdges < 3) {
+           throw new Error("ERROR! Number of edges has to be at least 3 but was: ".concat(numberOfEdges));
+         }
+       };

 
 

-               // can we connect to it?
-               var ids = [entity.id, target.id];
-               return actionConnect(ids).disabled(testGraph);
-           }
+       var validateEarthRadius$1 = {};

 
 

+       validateEarthRadius$1.validateEarthRadius = function validateEarthRadius(earthRadius) {
+         if (typeof earthRadius !== "number") {
+           var ARGUMENT_TYPE = Array.isArray(earthRadius) ? "array" : _typeof(earthRadius);
+           throw new Error("ERROR! Earth radius has to be a number but was: ".concat(ARGUMENT_TYPE));
+         }

 
 

-           function hasInvalidGeometry(entity, graph) {
-               var parents = graph.parentWays(entity);
-               var i, j, k;
+         if (earthRadius <= 0) {
+           throw new Error("ERROR! Earth radius has to be a positive number but was: ".concat(earthRadius));
+         }
+       };

 
 

-               for (i = 0; i < parents.length; i++) {
-                   var parent = parents[i];
-                   var nodes = [];
-                   var activeIndex = null;    // which multipolygon ring contains node being dragged
-
-                   // test any parent multipolygons for valid geometry
-                   var relations = graph.parentRelations(parent);
-                   for (j = 0; j < relations.length; j++) {
-                       if (!relations[j].isMultipolygon()) { continue; }
-
-                       var rings = osmJoinWays(relations[j].members, graph);
-
-                       // find active ring and test it for self intersections
-                       for (k = 0; k < rings.length; k++) {
-                           nodes = rings[k].nodes;
-                           if (nodes.find(function(n) { return n.id === entity.id; })) {
-                               activeIndex = k;
-                               if (geoHasSelfIntersections(nodes, entity.id)) {
-                                   return 'multipolygonMember';
-                               }
-                           }
-                           rings[k].coords = nodes.map(function(n) { return n.loc; });
-                       }
+       var validateBearing$1 = {};

 
 

-                       // test active ring for intersections with other rings in the multipolygon
-                       for (k = 0; k < rings.length; k++) {
-                           if (k === activeIndex) { continue; }
+       validateBearing$1.validateBearing = function validateBearing(bearing) {
+         if (typeof bearing !== "number") {
+           var ARGUMENT_TYPE = Array.isArray(bearing) ? "array" : _typeof(bearing);
+           throw new Error("ERROR! Bearing has to be a number but was: ".concat(ARGUMENT_TYPE));
+         }
+       };

 
 

-                           // make sure active ring doesnt cross passive rings
-                           if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
-                               return 'multipolygonRing';
-                           }
-                       }
-                   }
+       var validateCenter = validateCenter$1.validateCenter;
+       var validateRadius = validateRadius$1.validateRadius;
+       var validateNumberOfEdges = validateNumberOfEdges$1.validateNumberOfEdges;
+       var validateEarthRadius = validateEarthRadius$1.validateEarthRadius;
+       var validateBearing = validateBearing$1.validateBearing;

 
 

+       function validateInput$1(_ref) {
+         var center = _ref.center,
+             radius = _ref.radius,
+             numberOfEdges = _ref.numberOfEdges,
+             earthRadius = _ref.earthRadius,
+             bearing = _ref.bearing;
+         validateCenter(center);
+         validateRadius(radius);
+         validateNumberOfEdges(numberOfEdges);
+         validateEarthRadius(earthRadius);
+         validateBearing(bearing);
+       }

 
 

-                   // If we still haven't tested this node's parent way for self-intersections.
-                   // (because it's not a member of a multipolygon), test it now.
-                   if (activeIndex === null) {
-                       nodes = parent.nodes.map(function(nodeID) { return graph.entity(nodeID); });
-                       if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
-                           return parent.geometry(graph);
-                       }
-                   }
+       inputValidation.validateCenter = validateCenter;
+       inputValidation.validateRadius = validateRadius;
+       inputValidation.validateNumberOfEdges = validateNumberOfEdges;
+       inputValidation.validateEarthRadius = validateEarthRadius;
+       inputValidation.validateBearing = validateBearing;
+       inputValidation.validateInput = validateInput$1;

 
 

-               }
+       var validateInput = inputValidation.validateInput;
+       var defaultEarthRadius = 6378137; // equatorial Earth radius

 
 

-               return false;
-           }
+       function toRadians(angleInDegrees) {
+         return angleInDegrees * Math.PI / 180;
+       }

 
 

+       function toDegrees(angleInRadians) {
+         return angleInRadians * 180 / Math.PI;
+       }

 
 

-           function move(entity) {
-               if (_isCancelled) { return; }
-               event.sourceEvent.stopPropagation();
+       function offset(c1, distance, earthRadius, bearing) {
+         var lat1 = toRadians(c1[1]);
+         var lon1 = toRadians(c1[0]);
+         var dByR = distance / earthRadius;
+         var lat = Math.asin(Math.sin(lat1) * Math.cos(dByR) + Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing));
+         var lon = lon1 + Math.atan2(Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1), Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat));
+         return [toDegrees(lon), toDegrees(lat)];
+       }

 
 

-               context.surface().classed('nope-disabled', event.sourceEvent.altKey);
+       var circleToPolygon = function circleToPolygon(center, radius, options) {
+         var n = getNumberOfEdges(options);
+         var earthRadius = getEarthRadius(options);
+         var bearing = getBearing(options);
+         var direction = getDirection(options); // validateInput() throws error on invalid input and do nothing on valid input

 
 

-               _lastLoc = context.projection.invert(event.point);
+         validateInput({
+           center: center,
+           radius: radius,
+           numberOfEdges: n,
+           earthRadius: earthRadius,
+           bearing: bearing
+         });
+         var start = toRadians(bearing);
+         var coordinates = [];

 
 

-               doMove(entity);
-               var nudge = geoViewportEdge(event.point, context.map().dimensions());
-               if (nudge) {
-                   startNudge(entity, nudge);
-               } else {
-                   stopNudge();
-               }
-           }
+         for (var i = 0; i < n; ++i) {
+           coordinates.push(offset(center, radius, earthRadius, start + direction * 2 * Math.PI * -i / n));
+         }

 
 

-           function end(entity) {
-               if (_isCancelled) { return; }
+         coordinates.push(coordinates[0]);
+         return {
+           type: "Polygon",
+           coordinates: [coordinates]
+         };
+       };

 
 

-               var wasPoint = entity.geometry(context.graph()) === 'point';
+       function getNumberOfEdges(options) {
+         if (isUndefinedOrNull(options)) {
+           return 32;
+         } else if (isObjectNotArray(options)) {
+           var numberOfEdges = options.numberOfEdges;
+           return numberOfEdges === undefined ? 32 : numberOfEdges;
+         }

 
 

-               var d = datum();
-               var nope = (d && d.properties && d.properties.nope) || context.surface().classed('nope');
-               var target = d && d.properties && d.properties.entity;   // entity to snap to
+         return options;
+       }

 
 

-               if (nope) {   // bounce back
-                   context.perform(
-                       _actionBounceBack(entity.id, _startLoc)
-                   );
+       function getEarthRadius(options) {
+         if (isUndefinedOrNull(options)) {
+           return defaultEarthRadius;
+         } else if (isObjectNotArray(options)) {
+           var earthRadius = options.earthRadius;
+           return earthRadius === undefined ? defaultEarthRadius : earthRadius;
+         }

 
 

-               } else if (target && target.type === 'way') {
-                   var choice = geoChooseEdge(context.graph().childNodes(target), context.map().mouse(), context.projection, entity.id);
-                   context.replace(
-                       actionAddMidpoint({
-                           loc: choice.loc,
-                           edge: [target.nodes[choice.index - 1], target.nodes[choice.index]]
-                       }, entity),
-                       connectAnnotation(entity, target)
-                   );
+         return defaultEarthRadius;
+       }

 
 

-               } else if (target && target.type === 'node' && shouldSnapToNode(target)) {
-                   context.replace(
-                       actionConnect([target.id, entity.id]),
-                       connectAnnotation(entity, target)
-                   );
+       function getDirection(options) {
+         if (isObjectNotArray(options) && options.rightHandRule) {
+           return -1;
+         }

 
 

-               } else if (_wasMidpoint) {
-                   context.replace(
-                       actionNoop(),
-                       _t('operations.add.annotation.vertex')
-                   );
+         return 1;
+       }

 
 

-               } else {
-                   context.replace(
-                       actionNoop(),
-                       moveAnnotation(entity)
-                   );
-               }
+       function getBearing(options) {
+         if (isUndefinedOrNull(options)) {
+           return 0;
+         } else if (isObjectNotArray(options)) {
+           var bearing = options.bearing;
+           return bearing === undefined ? 0 : bearing;
+         }

 
 

-               if (wasPoint) {
-                   context.enter(modeSelect(context, [entity.id]));
+         return 0;
+       }

 
 

-               } else {
-                   var reselection = _restoreSelectedIDs.filter(function(id) {
-                       return context.graph().hasEntity(id);
-                   });
+       function isObjectNotArray(argument) {
+         return argument !== null && _typeof(argument) === "object" && !Array.isArray(argument);
+       }

 
 

-                   if (reselection.length) {
-                       context.enter(modeSelect(context, reselection));
-                   } else {
-                       context.enter(modeBrowse(context));
-                   }
-               }
-           }
+       function isUndefinedOrNull(argument) {
+         return argument === null || argument === undefined;
+       }

 
 

+       var $$f = _export;

 
 

-           function _actionBounceBack(nodeID, toLoc) {
-               var moveNode = actionMoveNode(nodeID, toLoc);
-               var action = function(graph, t) {
-                   // last time through, pop off the bounceback perform.
-                   // it will then overwrite the initial perform with a moveNode that does nothing
-                   if (t === 1) { context.pop(); }
-                   return moveNode(graph, t);
-               };
-               action.transitionable = true;
-               return action;
-           }
+       // `Number.EPSILON` constant
+       // https://tc39.es/ecma262/#sec-number.epsilon
+       $$f({ target: 'Number', stat: true }, {
+         EPSILON: Math.pow(2, -52)
+       });

 
 

+       var requireObjectCoercible$4 = requireObjectCoercible$e;

 
 

-           function cancel() {
-               drag.cancel();
-               context.enter(modeBrowse(context));
-           }
+       var quot = /"/g;

 
 

+       // `CreateHTML` abstract operation
+       // https://tc39.es/ecma262/#sec-createhtml
+       var createHtml = function (string, tag, attribute, value) {
+         var S = String(requireObjectCoercible$4(string));
+         var p1 = '<' + tag;
+         if (attribute !== '') p1 += ' ' + attribute + '="' + String(value).replace(quot, '&quot;') + '"';
+         return p1 + '>' + S + '</' + tag + '>';
+       };

 
 

-           var drag = behaviorDrag()
-               .selector('.layer-touch.points .target')
-               .surface(context.container().select('.main-map').node())
-               .origin(origin)
-               .on('start', start)
-               .on('move', move)
-               .on('end', end);
+       var fails$6 = fails$N;

 
 

+       // check the existence of a method, lowercase
+       // of a tag and escaping quotes in arguments
+       var stringHtmlForced = function (METHOD_NAME) {
+         return fails$6(function () {
+           var test = ''[METHOD_NAME]('"');
+           return test !== test.toLowerCase() || test.split('"').length > 3;
+         });
+       };

 
 

-           mode.enter = function() {
-               context.install(hover);
-               context.install(edit);
+       var $$e = _export;
+       var createHTML = createHtml;
+       var forcedStringHTMLMethod = stringHtmlForced;

 
 

-               select(window)
-                   .on('keydown.dragNode', keydown)
-                   .on('keyup.dragNode', keyup);
+       // `String.prototype.link` method
+       // https://tc39.es/ecma262/#sec-string.prototype.link
+       $$e({ target: 'String', proto: true, forced: forcedStringHTMLMethod('link') }, {
+         link: function link(url) {
+           return createHTML(this, 'a', 'href', url);
+         }
+       });

 
 

-               context.history()
-                   .on('undone.drag-node', cancel);
-           };
+       /**
+        * splaytree v3.1.0
+        * Fast Splay tree for Node and browser
+        *
+        * @author Alexander Milevski <info@w8r.name>
+        * @license MIT
+        * @preserve
+        */
+       var Node =
+       /** @class */
+       function () {
+         function Node(key, data) {
+           this.next = null;
+           this.key = key;
+           this.data = data;
+           this.left = null;
+           this.right = null;
+         }

 
 

+         return Node;
+       }();
+       /* follows "An implementation of top-down splaying"
+        * by D. Sleator <sleator@cs.cmu.edu> March 1992
+        */

 
 

-           mode.exit = function() {
-               context.ui().sidebar.hover.cancel();
-               context.uninstall(hover);
-               context.uninstall(edit);

 
 

-               select(window)
-                   .on('keydown.dragNode', null)
-                   .on('keyup.dragNode', null);
+       function DEFAULT_COMPARE(a, b) {
+         return a > b ? 1 : a < b ? -1 : 0;
+       }
+       /**
+        * Simple top down splay, not requiring i to be in the tree t.
+        */

 
 

-               context.history()
-                   .on('undone.drag-node', null);

 
 

-               _activeEntity = null;
+       function splay(i, t, comparator) {
+         var N = new Node(null, null);
+         var l = N;
+         var r = N;

 
 

-               context.surface()
-                   .classed('nope', false)
-                   .classed('nope-suppressed', false)
-                   .classed('nope-disabled', false)
-                   .selectAll('.active')
-                   .classed('active', false);
+         while (true) {
+           var cmp = comparator(i, t.key); //if (i < t.key) {

 
 

-               stopNudge();
-           };
+           if (cmp < 0) {
+             if (t.left === null) break; //if (i < t.left.key) {

 
 

+             if (comparator(i, t.left.key) < 0) {
+               var y = t.left;
+               /* rotate right */

 
 

-           mode.selectedIDs = function() {
-               if (!arguments.length) { return _activeEntity ? [_activeEntity.id] : []; }
-               // no assign
-               return mode;
-           };
+               t.left = y.right;
+               y.right = t;
+               t = y;
+               if (t.left === null) break;
+             }

 
 

+             r.left = t;
+             /* link right */

 
 

-           mode.activeID = function() {
-               if (!arguments.length) { return _activeEntity && _activeEntity.id; }
-               // no assign
-               return mode;
-           };
+             r = t;
+             t = t.left; //} else if (i > t.key) {
+           } else if (cmp > 0) {
+             if (t.right === null) break; //if (i > t.right.key) {

 
 

+             if (comparator(i, t.right.key) > 0) {
+               var y = t.right;
+               /* rotate left */

 
 

-           mode.restoreSelectedIDs = function(_) {
-               if (!arguments.length) { return _restoreSelectedIDs; }
-               _restoreSelectedIDs = _;
-               return mode;
-           };
+               t.right = y.left;
+               y.left = t;
+               t = y;
+               if (t.right === null) break;
+             }

 
 

+             l.right = t;
+             /* link left */

 
 

-           mode.behavior = drag;
+             l = t;
+             t = t.right;
+           } else break;
+         }
+         /* assemble */

 
 
 
 

-           return mode;
+         l.right = t.left;
+         r.left = t.right;
+         t.left = N.right;
+         t.right = N.left;
+         return t;

        }
 
        }
 

-       function quickselect(arr, k, left, right, compare) {
-           quickselectStep(arr, k, left || 0, right || (arr.length - 1), compare || defaultCompare);
-       }
+       function insert(i, data, t, comparator) {
+         var node = new Node(i, data);

 
 

-       function quickselectStep(arr, k, left, right, compare) {
+         if (t === null) {
+           node.left = node.right = null;
+           return node;
+         }

 
 

-           while (right > left) {
-               if (right - left > 600) {
-                   var n = right - left + 1;
-                   var m = k - left + 1;
-                   var z = Math.log(n);
-                   var s = 0.5 * Math.exp(2 * z / 3);
-                   var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
-                   var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
-                   var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
-                   quickselectStep(arr, k, newLeft, newRight, compare);
-               }
+         t = splay(i, t, comparator);
+         var cmp = comparator(i, t.key);

 
 

-               var t = arr[k];
-               var i = left;
-               var j = right;
+         if (cmp < 0) {
+           node.left = t.left;
+           node.right = t;
+           t.left = null;
+         } else if (cmp >= 0) {
+           node.right = t.right;
+           node.left = t;
+           t.right = null;
+         }

 
 

-               swap(arr, left, k);
-               if (compare(arr[right], t) > 0) { swap(arr, left, right); }
+         return node;
+       }

 
 

-               while (i < j) {
-                   swap(arr, i, j);
-                   i++;
-                   j--;
-                   while (compare(arr[i], t) < 0) { i++; }
-                   while (compare(arr[j], t) > 0) { j--; }
-               }
+       function split(key, v, comparator) {
+         var left = null;
+         var right = null;

 
 

-               if (compare(arr[left], t) === 0) { swap(arr, left, j); }
-               else {
-                   j++;
-                   swap(arr, j, right);
-               }
+         if (v) {
+           v = splay(key, v, comparator);
+           var cmp = comparator(v.key, key);

 
 

-               if (j <= k) { left = j + 1; }
-               if (k <= j) { right = j - 1; }
+           if (cmp === 0) {
+             left = v.left;
+             right = v.right;
+           } else if (cmp < 0) {
+             right = v.right;
+             v.right = null;
+             left = v;
+           } else {
+             left = v.left;
+             v.left = null;
+             right = v;

            }
            }

-       }
+         }

 
 

-       function swap(arr, i, j) {
-           var tmp = arr[i];
-           arr[i] = arr[j];
-           arr[j] = tmp;
+         return {
+           left: left,
+           right: right
+         };

        }
 
        }
 

-       function defaultCompare(a, b) {
-           return a < b ? -1 : a > b ? 1 : 0;
+       function merge$3(left, right, comparator) {
+         if (right === null) return left;
+         if (left === null) return right;
+         right = splay(left.key, right, comparator);
+         right.left = left;
+         return right;

        }
        }

+       /**
+        * Prints level of the tree
+        */

 
 

-       var RBush = function RBush(maxEntries) {
-           if ( maxEntries === void 0 ) maxEntries = 9;

 
 

-           // max entries in a node is 9 by default; min node fill is 40% for best performance
-           this._maxEntries = Math.max(4, maxEntries);
-           this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
-           this.clear();
-       };
+       function printRow(root, prefix, isTail, out, printNode) {
+         if (root) {
+           out("" + prefix + (isTail ? '└── ' : '├── ') + printNode(root) + "\n");
+           var indent = prefix + (isTail ? '    ' : '│   ');
+           if (root.left) printRow(root.left, indent, false, out, printNode);
+           if (root.right) printRow(root.right, indent, true, out, printNode);
+         }
+       }

 
 

-       RBush.prototype.all = function all () {
-           return this._all(this.data, []);
-       };
+       var Tree =
+       /** @class */
+       function () {
+         function Tree(comparator) {
+           if (comparator === void 0) {
+             comparator = DEFAULT_COMPARE;
+           }

 
 

-       RBush.prototype.search = function search (bbox) {
-           var node = this.data;
-           var result = [];
+           this._root = null;
+           this._size = 0;
+           this._comparator = comparator;
+         }
+         /**
+          * Inserts a key, allows duplicates
+          */

 
 

-           if (!intersects(bbox, node)) { return result; }

 
 

-           var toBBox = this.toBBox;
-           var nodesToSearch = [];
+         Tree.prototype.insert = function (key, data) {
+           this._size++;
+           return this._root = insert(key, data, this._root, this._comparator);
+         };
+         /**
+          * Adds a key, if it is not present in the tree
+          */

 
 

-           while (node) {
-               for (var i = 0; i < node.children.length; i++) {
-                   var child = node.children[i];
-                   var childBBox = node.leaf ? toBBox(child) : child;

 
 

-                   if (intersects(bbox, childBBox)) {
-                       if (node.leaf) { result.push(child); }
-                       else if (contains$1(bbox, childBBox)) { this._all(child, result); }
-                       else { nodesToSearch.push(child); }
-                   }
-               }
-               node = nodesToSearch.pop();
+         Tree.prototype.add = function (key, data) {
+           var node = new Node(key, data);
+
+           if (this._root === null) {
+             node.left = node.right = null;
+             this._size++;
+             this._root = node;

            }
 
            }
 

-           return result;
-       };
+           var comparator = this._comparator;
+           var t = splay(key, this._root, comparator);
+           var cmp = comparator(key, t.key);
+           if (cmp === 0) this._root = t;else {
+             if (cmp < 0) {
+               node.left = t.left;
+               node.right = t;
+               t.left = null;
+             } else if (cmp > 0) {
+               node.right = t.right;
+               node.left = t;
+               t.right = null;
+             }

 
 

-       RBush.prototype.collides = function collides (bbox) {
-           var node = this.data;
+             this._size++;
+             this._root = node;
+           }
+           return this._root;
+         };
+         /**
+          * @param  {Key} key
+          * @return {Node|null}
+          */

 
 

-           if (!intersects(bbox, node)) { return false; }

 
 

-           var nodesToSearch = [];
-           while (node) {
-               for (var i = 0; i < node.children.length; i++) {
-                   var child = node.children[i];
-                   var childBBox = node.leaf ? this.toBBox(child) : child;
+         Tree.prototype.remove = function (key) {
+           this._root = this._remove(key, this._root, this._comparator);
+         };
+         /**
+          * Deletes i from the tree if it's there
+          */

 
 

-                   if (intersects(bbox, childBBox)) {
-                       if (node.leaf || contains$1(bbox, childBBox)) { return true; }
-                       nodesToSearch.push(child);
-                   }
-               }
-               node = nodesToSearch.pop();
-           }

 
 

-           return false;
-       };
+         Tree.prototype._remove = function (i, t, comparator) {
+           var x;
+           if (t === null) return null;
+           t = splay(i, t, comparator);
+           var cmp = comparator(i, t.key);

 
 

-       RBush.prototype.load = function load (data) {
-           if (!(data && data.length)) { return this; }
+           if (cmp === 0) {
+             /* found it */
+             if (t.left === null) {
+               x = t.right;
+             } else {
+               x = splay(i, t.left, comparator);
+               x.right = t.right;
+             }

 
 

-           if (data.length < this._minEntries) {
-               for (var i = 0; i < data.length; i++) {
-                   this.insert(data[i]);
-               }
-               return this;
+             this._size--;
+             return x;

            }
 
            }
 

-           // recursively build the tree with the given data from scratch using OMT algorithm
-           var node = this._build(data.slice(), 0, data.length - 1, 0);
+           return t;
+           /* It wasn't there */
+         };
+         /**
+          * Removes and returns the node with smallest key
+          */

 
 

-           if (!this.data.children.length) {
-               // save as is if tree is empty
-               this.data = node;

 
 

-           } else if (this.data.height === node.height) {
-               // split root if trees have the same height
-               this._splitRoot(this.data, node);
+         Tree.prototype.pop = function () {
+           var node = this._root;

 
 

-           } else {
-               if (this.data.height < node.height) {
-                   // swap trees if inserted one is bigger
-                   var tmpNode = this.data;
-                   this.data = node;
-                   node = tmpNode;
-               }
+           if (node) {
+             while (node.left) {
+               node = node.left;
+             }

 
 

-               // insert the small tree into the large tree at appropriate level
-               this._insert(node, this.data.height - node.height - 1, true);
+             this._root = splay(node.key, this._root, this._comparator);
+             this._root = this._remove(node.key, this._root, this._comparator);
+             return {
+               key: node.key,
+               data: node.data
+             };

            }
 
            }
 

-           return this;
-       };
+           return null;
+         };
+         /**
+          * Find without splaying
+          */

 
 

-       RBush.prototype.insert = function insert (item) {
-           if (item) { this._insert(item, this.data.height - 1); }
-           return this;
-       };

 
 

-       RBush.prototype.clear = function clear () {
-           this.data = createNode([]);
-           return this;
-       };
+         Tree.prototype.findStatic = function (key) {
+           var current = this._root;
+           var compare = this._comparator;

 
 

-       RBush.prototype.remove = function remove (item, equalsFn) {
-           if (!item) { return this; }
+           while (current) {
+             var cmp = compare(key, current.key);
+             if (cmp === 0) return current;else if (cmp < 0) current = current.left;else current = current.right;
+           }

 
 

-           var node = this.data;
-           var bbox = this.toBBox(item);
-           var path = [];
-           var indexes = [];
-           var i, parent, goingUp;
+           return null;
+         };

 
 

-           // depth-first iterative tree traversal
-           while (node || path.length) {
+         Tree.prototype.find = function (key) {
+           if (this._root) {
+             this._root = splay(key, this._root, this._comparator);
+             if (this._comparator(key, this._root.key) !== 0) return null;
+           }

 
 

-               if (!node) { // go up
-                   node = path.pop();
-                   parent = path[path.length - 1];
-                   i = indexes.pop();
-                   goingUp = true;
-               }
+           return this._root;
+         };

 
 

-               if (node.leaf) { // check current node
-                   var index = findItem(item, node.children, equalsFn);
+         Tree.prototype.contains = function (key) {
+           var current = this._root;
+           var compare = this._comparator;

 
 

-                   if (index !== -1) {
-                       // item found, remove the item and condense tree upwards
-                       node.children.splice(index, 1);
-                       path.push(node);
-                       this._condense(path);
-                       return this;
-                   }
-               }
+           while (current) {
+             var cmp = compare(key, current.key);
+             if (cmp === 0) return true;else if (cmp < 0) current = current.left;else current = current.right;
+           }

 
 

-               if (!goingUp && !node.leaf && contains$1(node, bbox)) { // go down
-                   path.push(node);
-                   indexes.push(i);
-                   i = 0;
-                   parent = node;
-                   node = node.children[0];
+           return false;
+         };

 
 

-               } else if (parent) { // go right
-                   i++;
-                   node = parent.children[i];
-                   goingUp = false;
+         Tree.prototype.forEach = function (visitor, ctx) {
+           var current = this._root;
+           var Q = [];
+           /* Initialize stack s */
+
+           var done = false;

 
 

-               } else { node = null; } // nothing found
+           while (!done) {
+             if (current !== null) {
+               Q.push(current);
+               current = current.left;
+             } else {
+               if (Q.length !== 0) {
+                 current = Q.pop();
+                 visitor.call(ctx, current);
+                 current = current.right;
+               } else done = true;
+             }

            }
 
            return this;
            }
 
            return this;

-       };
+         };
+         /**
+          * Walk key range from `low` to `high`. Stops if `fn` returns a value.
+          */

 
 

-       RBush.prototype.toBBox = function toBBox (item) { return item; };

 
 

-       RBush.prototype.compareMinX = function compareMinX (a, b) { return a.minX - b.minX; };
-       RBush.prototype.compareMinY = function compareMinY (a, b) { return a.minY - b.minY; };
+         Tree.prototype.range = function (low, high, fn, ctx) {
+           var Q = [];
+           var compare = this._comparator;
+           var node = this._root;
+           var cmp;

 
 

-       RBush.prototype.toJSON = function toJSON () { return this.data; };
+           while (Q.length !== 0 || node) {
+             if (node) {
+               Q.push(node);
+               node = node.left;
+             } else {
+               node = Q.pop();
+               cmp = compare(node.key, high);
+
+               if (cmp > 0) {
+                 break;
+               } else if (compare(node.key, low) >= 0) {
+                 if (fn.call(ctx, node)) return this; // stop if smth is returned
+               }
+
+               node = node.right;
+             }
+           }

 
 

-       RBush.prototype.fromJSON = function fromJSON (data) {
-           this.data = data;

            return this;
            return this;

-       };
+         };
+         /**
+          * Returns array of keys
+          */

 
 

-       RBush.prototype._all = function _all (node, result) {
-           var nodesToSearch = [];
-           while (node) {
-               if (node.leaf) { result.push.apply(result, node.children); }
-               else { nodesToSearch.push.apply(nodesToSearch, node.children); }

 
 

-               node = nodesToSearch.pop();
-           }
-           return result;
-       };
+         Tree.prototype.keys = function () {
+           var keys = [];
+           this.forEach(function (_a) {
+             var key = _a.key;
+             return keys.push(key);
+           });
+           return keys;
+         };
+         /**
+          * Returns array of all the data in the nodes
+          */

 
 

-       RBush.prototype._build = function _build (items, left, right, height) {

 
 

-           var N = right - left + 1;
-           var M = this._maxEntries;
-           var node;
+         Tree.prototype.values = function () {
+           var values = [];
+           this.forEach(function (_a) {
+             var data = _a.data;
+             return values.push(data);
+           });
+           return values;
+         };

 
 

-           if (N <= M) {
-               // reached leaf level; return leaf
-               node = createNode(items.slice(left, right + 1));
-               calcBBox(node, this.toBBox);
-               return node;
+         Tree.prototype.min = function () {
+           if (this._root) return this.minNode(this._root).key;
+           return null;
+         };
+
+         Tree.prototype.max = function () {
+           if (this._root) return this.maxNode(this._root).key;
+           return null;
+         };
+
+         Tree.prototype.minNode = function (t) {
+           if (t === void 0) {
+             t = this._root;

            }
 
            }
 

-           if (!height) {
-               // target height of the bulk-loaded tree
-               height = Math.ceil(Math.log(N) / Math.log(M));
+           if (t) while (t.left) {
+             t = t.left;
+           }
+           return t;
+         };

 
 

-               // target number of root entries to maximize storage utilization
-               M = Math.ceil(N / Math.pow(M, height - 1));
+         Tree.prototype.maxNode = function (t) {
+           if (t === void 0) {
+             t = this._root;

            }
 
            }
 

-           node = createNode([]);
-           node.leaf = false;
-           node.height = height;
+           if (t) while (t.right) {
+             t = t.right;
+           }
+           return t;
+         };
+         /**
+          * Returns node at given index
+          */

 
 

-           // split the items into M mostly square tiles

 
 

-           var N2 = Math.ceil(N / M);
-           var N1 = N2 * Math.ceil(Math.sqrt(M));
+         Tree.prototype.at = function (index) {
+           var current = this._root;
+           var done = false;
+           var i = 0;
+           var Q = [];

 
 

-           multiSelect(items, left, right, N1, this.compareMinX);
+           while (!done) {
+             if (current) {
+               Q.push(current);
+               current = current.left;
+             } else {
+               if (Q.length > 0) {
+                 current = Q.pop();
+                 if (i === index) return current;
+                 i++;
+                 current = current.right;
+               } else done = true;
+             }
+           }

 
 

-           for (var i = left; i <= right; i += N1) {
+           return null;
+         };

 
 

-               var right2 = Math.min(i + N1 - 1, right);
+         Tree.prototype.next = function (d) {
+           var root = this._root;
+           var successor = null;

 
 

-               multiSelect(items, i, right2, N2, this.compareMinY);
+           if (d.right) {
+             successor = d.right;

 
 

-               for (var j = i; j <= right2; j += N2) {
+             while (successor.left) {
+               successor = successor.left;
+             }

 
 

-                   var right3 = Math.min(j + N2 - 1, right2);
+             return successor;
+           }

 
 

-                   // pack each entry recursively
-                   node.children.push(this._build(items, j, right3, height - 1));
-               }
+           var comparator = this._comparator;
+
+           while (root) {
+             var cmp = comparator(d.key, root.key);
+             if (cmp === 0) break;else if (cmp < 0) {
+               successor = root;
+               root = root.left;
+             } else root = root.right;

            }
 
            }
 

-           calcBBox(node, this.toBBox);
+           return successor;
+         };

 
 

-           return node;
-       };
+         Tree.prototype.prev = function (d) {
+           var root = this._root;
+           var predecessor = null;

 
 

-       RBush.prototype._chooseSubtree = function _chooseSubtree (bbox, node, level, path) {
-           while (true) {
-               path.push(node);
+           if (d.left !== null) {
+             predecessor = d.left;

 
 

-               if (node.leaf || path.length - 1 === level) { break; }
+             while (predecessor.right) {
+               predecessor = predecessor.right;
+             }

 
 

-               var minArea = Infinity;
-               var minEnlargement = Infinity;
-               var targetNode = (void 0);
+             return predecessor;
+           }

 
 

-               for (var i = 0; i < node.children.length; i++) {
-                   var child = node.children[i];
-                   var area = bboxArea(child);
-                   var enlargement = enlargedArea(bbox, child) - area;
-
-                   // choose entry with the least area enlargement
-                   if (enlargement < minEnlargement) {
-                       minEnlargement = enlargement;
-                       minArea = area < minArea ? area : minArea;
-                       targetNode = child;
-
-                   } else if (enlargement === minEnlargement) {
-                       // otherwise choose one with the smallest area
-                       if (area < minArea) {
-                           minArea = area;
-                           targetNode = child;
-                       }
-                   }
-               }
+           var comparator = this._comparator;

 
 

-               node = targetNode || node.children[0];
+           while (root) {
+             var cmp = comparator(d.key, root.key);
+             if (cmp === 0) break;else if (cmp < 0) root = root.left;else {
+               predecessor = root;
+               root = root.right;
+             }

            }
 
            }
 

-           return node;
-       };
+           return predecessor;
+         };

 
 

-       RBush.prototype._insert = function _insert (item, level, isNode) {
-           var bbox = isNode ? item : this.toBBox(item);
-           var insertPath = [];
+         Tree.prototype.clear = function () {
+           this._root = null;
+           this._size = 0;
+           return this;
+         };

 
 

-           // find the best node for accommodating the item, saving all nodes along the path too
-           var node = this._chooseSubtree(bbox, this.data, level, insertPath);
+         Tree.prototype.toList = function () {
+           return toList(this._root);
+         };
+         /**
+          * Bulk-load items. Both array have to be same size
+          */

 
 

-           // put the item into the node
-           node.children.push(item);
-           extend$1(node, bbox);

 
 

-           // split on node overflow; propagate upwards if necessary
-           while (level >= 0) {
-               if (insertPath[level].children.length > this._maxEntries) {
-                   this._split(insertPath, level);
-                   level--;
-               } else { break; }
+         Tree.prototype.load = function (keys, values, presort) {
+           if (values === void 0) {
+             values = [];

            }
 
            }
 

-           // adjust bboxes along the insertion path
-           this._adjustParentBBoxes(bbox, insertPath, level);
-       };
+           if (presort === void 0) {
+             presort = false;
+           }

 
 

-       // split overflowed node into two
-       RBush.prototype._split = function _split (insertPath, level) {
-           var node = insertPath[level];
-           var M = node.children.length;
-           var m = this._minEntries;
+           var size = keys.length;
+           var comparator = this._comparator; // sort if needed

 
 

-           this._chooseSplitAxis(node, m, M);
+           if (presort) sort(keys, values, 0, size - 1, comparator);

 
 

-           var splitIndex = this._chooseSplitIndex(node, m, M);
+           if (this._root === null) {
+             // empty tree
+             this._root = loadRecursive(keys, values, 0, size);
+             this._size = size;
+           } else {
+             // that re-builds the whole tree from two in-order traversals
+             var mergedList = mergeLists(this.toList(), createList(keys, values), comparator);
+             size = this._size + size;
+             this._root = sortedListToBST({
+               head: mergedList
+             }, 0, size);
+           }

 
 

-           var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));
-           newNode.height = node.height;
-           newNode.leaf = node.leaf;
+           return this;
+         };

 
 

-           calcBBox(node, this.toBBox);
-           calcBBox(newNode, this.toBBox);
+         Tree.prototype.isEmpty = function () {
+           return this._root === null;
+         };

 
 

-           if (level) { insertPath[level - 1].children.push(newNode); }
-           else { this._splitRoot(node, newNode); }
-       };
+         Object.defineProperty(Tree.prototype, "size", {
+           get: function get() {
+             return this._size;
+           },
+           enumerable: true,
+           configurable: true
+         });
+         Object.defineProperty(Tree.prototype, "root", {
+           get: function get() {
+             return this._root;
+           },
+           enumerable: true,
+           configurable: true
+         });

 
 

-       RBush.prototype._splitRoot = function _splitRoot (node, newNode) {
-           // split root node
-           this.data = createNode([node, newNode]);
-           this.data.height = node.height + 1;
-           this.data.leaf = false;
-           calcBBox(this.data, this.toBBox);
-       };
+         Tree.prototype.toString = function (printNode) {
+           if (printNode === void 0) {
+             printNode = function printNode(n) {
+               return String(n.key);
+             };
+           }

 
 

-       RBush.prototype._chooseSplitIndex = function _chooseSplitIndex (node, m, M) {
-           var index;
-           var minOverlap = Infinity;
-           var minArea = Infinity;
+           var out = [];
+           printRow(this._root, '', true, function (v) {
+             return out.push(v);
+           }, printNode);
+           return out.join('');
+         };

 
 

-           for (var i = m; i <= M - m; i++) {
-               var bbox1 = distBBox(node, 0, i, this.toBBox);
-               var bbox2 = distBBox(node, i, M, this.toBBox);
+         Tree.prototype.update = function (key, newKey, newData) {
+           var comparator = this._comparator;

 
 

-               var overlap = intersectionArea(bbox1, bbox2);
-               var area = bboxArea(bbox1) + bboxArea(bbox2);
+           var _a = split(key, this._root, comparator),
+               left = _a.left,
+               right = _a.right;

 
 

-               // choose distribution with minimum overlap
-               if (overlap < minOverlap) {
-                   minOverlap = overlap;
-                   index = i;
+           if (comparator(key, newKey) < 0) {
+             right = insert(newKey, newData, right, comparator);
+           } else {
+             left = insert(newKey, newData, left, comparator);
+           }

 
 

-                   minArea = area < minArea ? area : minArea;
+           this._root = merge$3(left, right, comparator);
+         };

 
 

-               } else if (overlap === minOverlap) {
-                   // otherwise choose distribution with minimum area
-                   if (area < minArea) {
-                       minArea = area;
-                       index = i;
-                   }
-               }
-           }
+         Tree.prototype.split = function (key) {
+           return split(key, this._root, this._comparator);
+         };

 
 

-           return index || M - m;
-       };
+         return Tree;
+       }();

 
 

-       // sorts node children by the best axis for split
-       RBush.prototype._chooseSplitAxis = function _chooseSplitAxis (node, m, M) {
-           var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
-           var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
-           var xMargin = this._allDistMargin(node, m, M, compareMinX);
-           var yMargin = this._allDistMargin(node, m, M, compareMinY);
+       function loadRecursive(keys, values, start, end) {
+         var size = end - start;

 
 

-           // if total distributions margin value is minimal for x, sort by minX,
-           // otherwise it's already sorted by minY
-           if (xMargin < yMargin) { node.children.sort(compareMinX); }
-       };
+         if (size > 0) {
+           var middle = start + Math.floor(size / 2);
+           var key = keys[middle];
+           var data = values[middle];
+           var node = new Node(key, data);
+           node.left = loadRecursive(keys, values, start, middle);
+           node.right = loadRecursive(keys, values, middle + 1, end);
+           return node;
+         }

 
 

-       // total margin of all possible split distributions where each node is at least m full
-       RBush.prototype._allDistMargin = function _allDistMargin (node, m, M, compare) {
-           node.children.sort(compare);
+         return null;
+       }

 
 

-           var toBBox = this.toBBox;
-           var leftBBox = distBBox(node, 0, m, toBBox);
-           var rightBBox = distBBox(node, M - m, M, toBBox);
-           var margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);
+       function createList(keys, values) {
+         var head = new Node(null, null);
+         var p = head;

 
 

-           for (var i = m; i < M - m; i++) {
-               var child = node.children[i];
-               extend$1(leftBBox, node.leaf ? toBBox(child) : child);
-               margin += bboxMargin(leftBBox);
-           }
+         for (var i = 0; i < keys.length; i++) {
+           p = p.next = new Node(keys[i], values[i]);
+         }

 
 

-           for (var i$1 = M - m - 1; i$1 >= m; i$1--) {
-               var child$1 = node.children[i$1];
-               extend$1(rightBBox, node.leaf ? toBBox(child$1) : child$1);
-               margin += bboxMargin(rightBBox);
-           }
+         p.next = null;
+         return head.next;
+       }

 
 

-           return margin;
-       };
+       function toList(root) {
+         var current = root;
+         var Q = [];
+         var done = false;
+         var head = new Node(null, null);
+         var p = head;

 
 

-       RBush.prototype._adjustParentBBoxes = function _adjustParentBBoxes (bbox, path, level) {
-           // adjust bboxes along the given tree path
-           for (var i = level; i >= 0; i--) {
-               extend$1(path[i], bbox);
+         while (!done) {
+           if (current) {
+             Q.push(current);
+             current = current.left;
+           } else {
+             if (Q.length > 0) {
+               current = p = p.next = Q.pop();
+               current = current.right;
+             } else done = true;

            }
            }

-       };
+         }

 
 

-       RBush.prototype._condense = function _condense (path) {
-           // go through the path, removing empty nodes and updating bboxes
-           for (var i = path.length - 1, siblings = (void 0); i >= 0; i--) {
-               if (path[i].children.length === 0) {
-                   if (i > 0) {
-                       siblings = path[i - 1].children;
-                       siblings.splice(siblings.indexOf(path[i]), 1);
+         p.next = null; // that'll work even if the tree was empty

 
 

-                   } else { this.clear(); }
+         return head.next;
+       }

 
 

-               } else { calcBBox(path[i], this.toBBox); }
-           }
-       };
+       function sortedListToBST(list, start, end) {
+         var size = end - start;

 
 

-       function findItem(item, items, equalsFn) {
-           if (!equalsFn) { return items.indexOf(item); }
+         if (size > 0) {
+           var middle = start + Math.floor(size / 2);
+           var left = sortedListToBST(list, start, middle);
+           var root = list.head;
+           root.left = left;
+           list.head = list.head.next;
+           root.right = sortedListToBST(list, middle + 1, end);
+           return root;
+         }

 
 

-           for (var i = 0; i < items.length; i++) {
-               if (equalsFn(item, items[i])) { return i; }
-           }
-           return -1;
+         return null;

        }
 
        }
 

-       // calculate node's bbox from bboxes of its children
-       function calcBBox(node, toBBox) {
-           distBBox(node, 0, node.children.length, toBBox, node);
-       }
+       function mergeLists(l1, l2, compare) {
+         var head = new Node(null, null); // dummy

 
 

-       // min bounding rectangle of node children from k to p-1
-       function distBBox(node, k, p, toBBox, destNode) {
-           if (!destNode) { destNode = createNode(null); }
-           destNode.minX = Infinity;
-           destNode.minY = Infinity;
-           destNode.maxX = -Infinity;
-           destNode.maxY = -Infinity;
+         var p = head;
+         var p1 = l1;
+         var p2 = l2;

 
 

-           for (var i = k; i < p; i++) {
-               var child = node.children[i];
-               extend$1(destNode, node.leaf ? toBBox(child) : child);
+         while (p1 !== null && p2 !== null) {
+           if (compare(p1.key, p2.key) < 0) {
+             p.next = p1;
+             p1 = p1.next;
+           } else {
+             p.next = p2;
+             p2 = p2.next;

            }
 
            }
 

-           return destNode;
-       }
+           p = p.next;
+         }

 
 

-       function extend$1(a, b) {
-           a.minX = Math.min(a.minX, b.minX);
-           a.minY = Math.min(a.minY, b.minY);
-           a.maxX = Math.max(a.maxX, b.maxX);
-           a.maxY = Math.max(a.maxY, b.maxY);
-           return a;
+         if (p1 !== null) {
+           p.next = p1;
+         } else if (p2 !== null) {
+           p.next = p2;
+         }
+
+         return head.next;

        }
 
        }
 

-       function compareNodeMinX(a, b) { return a.minX - b.minX; }
-       function compareNodeMinY(a, b) { return a.minY - b.minY; }
+       function sort(keys, values, left, right, compare) {
+         if (left >= right) return;
+         var pivot = keys[left + right >> 1];
+         var i = left - 1;
+         var j = right + 1;

 
 

-       function bboxArea(a)   { return (a.maxX - a.minX) * (a.maxY - a.minY); }
-       function bboxMargin(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }
+         while (true) {
+           do {
+             i++;
+           } while (compare(keys[i], pivot) < 0);

 
 

-       function enlargedArea(a, b) {
-           return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *
-                  (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
-       }
+           do {
+             j--;
+           } while (compare(keys[j], pivot) > 0);

 
 

-       function intersectionArea(a, b) {
-           var minX = Math.max(a.minX, b.minX);
-           var minY = Math.max(a.minY, b.minY);
-           var maxX = Math.min(a.maxX, b.maxX);
-           var maxY = Math.min(a.maxY, b.maxY);
+           if (i >= j) break;
+           var tmp = keys[i];
+           keys[i] = keys[j];
+           keys[j] = tmp;
+           tmp = values[i];
+           values[i] = values[j];
+           values[j] = tmp;
+         }

 
 

-           return Math.max(0, maxX - minX) *
-                  Math.max(0, maxY - minY);
+         sort(keys, values, left, j, compare);
+         sort(keys, values, j + 1, right, compare);

        }
 
        }
 

-       function contains$1(a, b) {
-           return a.minX <= b.minX &&
-                  a.minY <= b.minY &&
-                  b.maxX <= a.maxX &&
-                  b.maxY <= a.maxY;
+       function _classCallCheck(instance, Constructor) {
+         if (!(instance instanceof Constructor)) {
+           throw new TypeError("Cannot call a class as a function");
+         }

        }
 
        }
 

-       function intersects(a, b) {
-           return b.minX <= a.maxX &&
-                  b.minY <= a.maxY &&
-                  b.maxX >= a.minX &&
-                  b.maxY >= a.minY;
+       function _defineProperties(target, props) {
+         for (var i = 0; i < props.length; i++) {
+           var descriptor = props[i];
+           descriptor.enumerable = descriptor.enumerable || false;
+           descriptor.configurable = true;
+           if ("value" in descriptor) descriptor.writable = true;
+           Object.defineProperty(target, descriptor.key, descriptor);
+         }

        }
 
        }
 

-       function createNode(children) {
-           return {
-               children: children,
-               height: 1,
-               leaf: true,
-               minX: Infinity,
-               minY: Infinity,
-               maxX: -Infinity,
-               maxY: -Infinity
-           };
+       function _createClass(Constructor, protoProps, staticProps) {
+         if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+         if (staticProps) _defineProperties(Constructor, staticProps);
+         return Constructor;

        }
        }

+       /**
+        * A bounding box has the format:
+        *
+        *  { ll: { x: xmin, y: ymin }, ur: { x: xmax, y: ymax } }
+        *
+        */

 
 

-       // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
-       // combines selection algorithm with binary divide & conquer approach

 
 

-       function multiSelect(arr, left, right, n, compare) {
-           var stack = [left, right];
+       var isInBbox = function isInBbox(bbox, point) {
+         return bbox.ll.x <= point.x && point.x <= bbox.ur.x && bbox.ll.y <= point.y && point.y <= bbox.ur.y;
+       };
+       /* Returns either null, or a bbox (aka an ordered pair of points)
+        * If there is only one point of overlap, a bbox with identical points
+        * will be returned */
+

 
 

-           while (stack.length) {
-               right = stack.pop();
-               left = stack.pop();
+       var getBboxOverlap = function getBboxOverlap(b1, b2) {
+         // check if the bboxes overlap at all
+         if (b2.ur.x < b1.ll.x || b1.ur.x < b2.ll.x || b2.ur.y < b1.ll.y || b1.ur.y < b2.ll.y) return null; // find the middle two X values

 
 

-               if (right - left <= n) { continue; }
+         var lowerX = b1.ll.x < b2.ll.x ? b2.ll.x : b1.ll.x;
+         var upperX = b1.ur.x < b2.ur.x ? b1.ur.x : b2.ur.x; // find the middle two Y values

 
 

-               var mid = left + Math.ceil((right - left) / n / 2) * n;
-               quickselect(arr, mid, left, right, compare);
+         var lowerY = b1.ll.y < b2.ll.y ? b2.ll.y : b1.ll.y;
+         var upperY = b1.ur.y < b2.ur.y ? b1.ur.y : b2.ur.y; // put those middle values together to get the overlap

 
 

-               stack.push(left, mid, mid, right);
+         return {
+           ll: {
+             x: lowerX,
+             y: lowerY
+           },
+           ur: {
+             x: upperX,
+             y: upperY

            }
            }

-       }
+         };
+       };
+       /* Javascript doesn't do integer math. Everything is
+        * floating point with percision Number.EPSILON.
+        *
+        * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/EPSILON
+        */

 
 

-       var tiler = utilTiler();
-       var dispatch$1 = dispatch('loaded');
-       var _tileZoom = 14;
-       var _krUrlRoot = 'https://www.keepright.at';
-       var _krData = { errorTypes: {}, localizeStrings: {} };

 
 

-       // This gets reassigned if reset
-       var _cache;
+       var epsilon = Number.EPSILON; // IE Polyfill

 
 

-       var _krRuleset = [
-         // no 20 - multiple node on same spot - these are mostly boundaries overlapping roads
-         30, 40, 50, 60, 70, 90, 100, 110, 120, 130, 150, 160, 170, 180,
-         190, 191, 192, 193, 194, 195, 196, 197, 198,
-         200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 220,
-         230, 231, 232, 270, 280, 281, 282, 283, 284, 285,
-         290, 291, 292, 293, 294, 295, 296, 297, 298, 300, 310, 311, 312, 313,
-         320, 350, 360, 370, 380, 390, 400, 401, 402, 410, 411, 412, 413
-       ];
+       if (epsilon === undefined) epsilon = Math.pow(2, -52);
+       var EPSILON_SQ = epsilon * epsilon;
+       /* FLP comparator */

 
 

+       var cmp = function cmp(a, b) {
+         // check if they're both 0
+         if (-epsilon < a && a < epsilon) {
+           if (-epsilon < b && b < epsilon) {
+             return 0;
+           }
+         } // check if they're flp equal

 
 

-       function abortRequest(controller) {
-         if (controller) {
-           controller.abort();
-         }
-       }

 
 

-       function abortUnwantedRequests(cache, tiles) {
-         Object.keys(cache.inflightTile).forEach(function (k) {
-           var wanted = tiles.find(function (tile) { return k === tile.id; });
-           if (!wanted) {
-             abortRequest(cache.inflightTile[k]);
-             delete cache.inflightTile[k];
-           }
-         });
-       }
+         var ab = a - b;

 
 

+         if (ab * ab < EPSILON_SQ * a * b) {
+           return 0;
+         } // normal comparison

 
 

-       function encodeIssueRtree(d) {
-         return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-       }

 
 

+         return a < b ? -1 : 1;
+       };
+       /**
+        * This class rounds incoming values sufficiently so that
+        * floating points problems are, for the most part, avoided.
+        *
+        * Incoming points are have their x & y values tested against
+        * all previously seen x & y values. If either is 'too close'
+        * to a previously seen value, it's value is 'snapped' to the
+        * previously seen value.
+        *
+        * All points should be rounded by this class before being
+        * stored in any data structures in the rest of this algorithm.
+        */

 
 

-       // Replace or remove QAItem from rtree
-       function updateRtree(item, replace) {
-         _cache.rtree.remove(item, function (a, b) { return a.data.id === b.data.id; });

 
 

-         if (replace) {
-           _cache.rtree.insert(item);
+       var PtRounder = /*#__PURE__*/function () {
+         function PtRounder() {
+           _classCallCheck(this, PtRounder);
+
+           this.reset();

          }
          }

-       }

 
 

+         _createClass(PtRounder, [{
+           key: "reset",
+           value: function reset() {
+             this.xRounder = new CoordRounder();
+             this.yRounder = new CoordRounder();
+           }
+         }, {
+           key: "round",
+           value: function round(x, y) {
+             return {
+               x: this.xRounder.round(x),
+               y: this.yRounder.round(y)
+             };
+           }
+         }]);

 
 

-       function tokenReplacements(d) {
-         if (!(d instanceof QAItem)) { return; }
+         return PtRounder;
+       }();

 
 

-         var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
-         var replacements = {};
+       var CoordRounder = /*#__PURE__*/function () {
+         function CoordRounder() {
+           _classCallCheck(this, CoordRounder);

 
 

-         var issueTemplate = _krData.errorTypes[d.whichType];
-         if (!issueTemplate) {
-           /* eslint-disable no-console */
-           console.log('No Template: ', d.whichType);
-           console.log('  ', d.description);
-           /* eslint-enable no-console */
-           return;
-         }
+           this.tree = new Tree(); // preseed with 0 so we don't end up with values < Number.EPSILON

 
 

-         // some descriptions are just fixed text
-         if (!issueTemplate.regex) { return; }
+           this.round(0);
+         } // Note: this can rounds input values backwards or forwards.
+         //       You might ask, why not restrict this to just rounding
+         //       forwards? Wouldn't that allow left endpoints to always
+         //       remain left endpoints during splitting (never change to
+         //       right). No - it wouldn't, because we snap intersections
+         //       to endpoints (to establish independence from the segment
+         //       angle for t-intersections).

 
 

-         // regex pattern should match description with variable details captured
-         var errorRegex = new RegExp(issueTemplate.regex, 'i');
-         var errorMatch = errorRegex.exec(d.description);
-         if (!errorMatch) {
-           /* eslint-disable no-console */
-           console.log('Unmatched: ', d.whichType);
-           console.log('  ', d.description);
-           console.log('  ', errorRegex);
-           /* eslint-enable no-console */
-           return;
-         }

 
 

-         for (var i = 1; i < errorMatch.length; i++) {   // skip first
-           var capture = errorMatch[i];
-           var idType = (void 0);
+         _createClass(CoordRounder, [{
+           key: "round",
+           value: function round(coord) {
+             var node = this.tree.add(coord);
+             var prevNode = this.tree.prev(node);

 
 

-           idType = 'IDs' in issueTemplate ? issueTemplate.IDs[i-1] : '';
-           if (idType && capture) {   // link IDs if present in the capture
-             capture = parseError(capture, idType);
-           } else if (htmlRegex.test(capture)) {   // escape any html in non-IDs
-             capture = '\\' +  capture + '\\';
-           } else {
-             var compare = capture.toLowerCase();
-             if (_krData.localizeStrings[compare]) {   // some replacement strings can be localized
-               capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+             if (prevNode !== null && cmp(node.key, prevNode.key) === 0) {
+               this.tree.remove(coord);
+               return prevNode.key;
+             }
+
+             var nextNode = this.tree.next(node);
+
+             if (nextNode !== null && cmp(node.key, nextNode.key) === 0) {
+               this.tree.remove(coord);
+               return nextNode.key;

              }
              }

+
+             return coord;

            }
            }

+         }]);

 
 

-           replacements['var' + i] = capture;
-         }
+         return CoordRounder;
+       }(); // singleton available by import

 
 

-         return replacements;
-       }

 
 

+       var rounder = new PtRounder();
+       /* Cross Product of two vectors with first point at origin */

 
 

-       function parseError(capture, idType) {
-         var compare = capture.toLowerCase();
-         if (_krData.localizeStrings[compare]) {   // some replacement strings can be localized
-           capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
-         }
+       var crossProduct = function crossProduct(a, b) {
+         return a.x * b.y - a.y * b.x;
+       };
+       /* Dot Product of two vectors with first point at origin */

 
 

-         switch (idType) {
-           // link a string like "this node"
-           case 'this':
-             capture = linkErrorObject(capture);
-             break;

 
 

-           case 'url':
-             capture = linkURL(capture);
-             break;
+       var dotProduct = function dotProduct(a, b) {
+         return a.x * b.x + a.y * b.y;
+       };
+       /* Comparator for two vectors with same starting point */

 
 

-           // link an entity ID
-           case 'n':
-           case 'w':
-           case 'r':
-             capture = linkEntity(idType + capture);
-             break;

 
 

-           // some errors have more complex ID lists/variance
-           case '20':
-             capture = parse20(capture);
-             break;
-           case '211':
-             capture = parse211(capture);
-             break;
-           case '231':
-             capture = parse231(capture);
-             break;
-           case '294':
-             capture = parse294(capture);
-             break;
-           case '370':
-             capture = parse370(capture);
-             break;
-         }
+       var compareVectorAngles = function compareVectorAngles(basePt, endPt1, endPt2) {
+         var v1 = {
+           x: endPt1.x - basePt.x,
+           y: endPt1.y - basePt.y
+         };
+         var v2 = {
+           x: endPt2.x - basePt.x,
+           y: endPt2.y - basePt.y
+         };
+         var kross = crossProduct(v1, v2);
+         return cmp(kross, 0);
+       };

 
 

-         return capture;
+       var length = function length(v) {
+         return Math.sqrt(dotProduct(v, v));
+       };
+       /* Get the sine of the angle from pShared -> pAngle to pShaed -> pBase */

 
 
 
 

-         function linkErrorObject(d) {
-           return ("<a class=\"error_object_link\">" + d + "</a>");
-         }
+       var sineOfAngle = function sineOfAngle(pShared, pBase, pAngle) {
+         var vBase = {
+           x: pBase.x - pShared.x,
+           y: pBase.y - pShared.y
+         };
+         var vAngle = {
+           x: pAngle.x - pShared.x,
+           y: pAngle.y - pShared.y
+         };
+         return crossProduct(vAngle, vBase) / length(vAngle) / length(vBase);
+       };
+       /* Get the cosine of the angle from pShared -> pAngle to pShaed -> pBase */

 
 

-         function linkEntity(d) {
-           return ("<a class=\"error_entity_link\">" + d + "</a>");
-         }

 
 

-         function linkURL(d) {
-           return ("<a class=\"kr_external_link\" target=\"_blank\" href=\"" + d + "\">" + d + "</a>");
-         }
+       var cosineOfAngle = function cosineOfAngle(pShared, pBase, pAngle) {
+         var vBase = {
+           x: pBase.x - pShared.x,
+           y: pBase.y - pShared.y
+         };
+         var vAngle = {
+           x: pAngle.x - pShared.x,
+           y: pAngle.y - pShared.y
+         };
+         return dotProduct(vAngle, vBase) / length(vAngle) / length(vBase);
+       };
+       /* Get the x coordinate where the given line (defined by a point and vector)
+        * crosses the horizontal line with the given y coordiante.
+        * In the case of parrallel lines (including overlapping ones) returns null. */

 
 

-         // arbitrary node list of form: #ID, #ID, #ID...
-         function parse211(capture) {
-           var newList = [];
-           var items = capture.split(', ');

 
 

-           items.forEach(function (item) {
-             // ID has # at the front
-             var id = linkEntity('n' + item.slice(1));
-             newList.push(id);
-           });
+       var horizontalIntersection = function horizontalIntersection(pt, v, y) {
+         if (v.y === 0) return null;
+         return {
+           x: pt.x + v.x / v.y * (y - pt.y),
+           y: y
+         };
+       };
+       /* Get the y coordinate where the given line (defined by a point and vector)
+        * crosses the vertical line with the given x coordiante.
+        * In the case of parrallel lines (including overlapping ones) returns null. */

 
 

-           return newList.join(', ');
-         }

 
 

-         // arbitrary way list of form: #ID(layer),#ID(layer),#ID(layer)...
-         function parse231(capture) {
-           var newList = [];
-           // unfortunately 'layer' can itself contain commas, so we split on '),'
-           var items = capture.split('),');
+       var verticalIntersection = function verticalIntersection(pt, v, x) {
+         if (v.x === 0) return null;
+         return {
+           x: x,
+           y: pt.y + v.y / v.x * (x - pt.x)
+         };
+       };
+       /* Get the intersection of two lines, each defined by a base point and a vector.
+        * In the case of parrallel lines (including overlapping ones) returns null. */
+
+
+       var intersection = function intersection(pt1, v1, pt2, v2) {
+         // take some shortcuts for vertical and horizontal lines
+         // this also ensures we don't calculate an intersection and then discover
+         // it's actually outside the bounding box of the line
+         if (v1.x === 0) return verticalIntersection(pt2, v2, pt1.x);
+         if (v2.x === 0) return verticalIntersection(pt1, v1, pt2.x);
+         if (v1.y === 0) return horizontalIntersection(pt2, v2, pt1.y);
+         if (v2.y === 0) return horizontalIntersection(pt1, v1, pt2.y); // General case for non-overlapping segments.
+         // This algorithm is based on Schneider and Eberly.
+         // http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf - pg 244
+
+         var kross = crossProduct(v1, v2);
+         if (kross == 0) return null;
+         var ve = {
+           x: pt2.x - pt1.x,
+           y: pt2.y - pt1.y
+         };
+         var d1 = crossProduct(ve, v1) / kross;
+         var d2 = crossProduct(ve, v2) / kross; // take the average of the two calculations to minimize rounding error
+
+         var x1 = pt1.x + d2 * v1.x,
+             x2 = pt2.x + d1 * v2.x;
+         var y1 = pt1.y + d2 * v1.y,
+             y2 = pt2.y + d1 * v2.y;
+         var x = (x1 + x2) / 2;
+         var y = (y1 + y2) / 2;
+         return {
+           x: x,
+           y: y
+         };
+       };

 
 

-           items.forEach(function (item) {
-             var match = item.match(/\#(\d+)\((.+)\)?/);
-             if (match !== null && match.length > 2) {
-               newList.push(linkEntity('w' + match[1]) + ' ' +
-                 _t('QA.keepRight.errorTypes.231.layer', { layer: match[2] })
-               );
+       var SweepEvent = /*#__PURE__*/function () {
+         _createClass(SweepEvent, null, [{
+           key: "compare",
+           // for ordering sweep events in the sweep event queue
+           value: function compare(a, b) {
+             // favor event with a point that the sweep line hits first
+             var ptCmp = SweepEvent.comparePoints(a.point, b.point);
+             if (ptCmp !== 0) return ptCmp; // the points are the same, so link them if needed
+
+             if (a.point !== b.point) a.link(b); // favor right events over left
+
+             if (a.isLeft !== b.isLeft) return a.isLeft ? 1 : -1; // we have two matching left or right endpoints
+             // ordering of this case is the same as for their segments
+
+             return Segment.compare(a.segment, b.segment);
+           } // for ordering points in sweep line order
+
+         }, {
+           key: "comparePoints",
+           value: function comparePoints(aPt, bPt) {
+             if (aPt.x < bPt.x) return -1;
+             if (aPt.x > bPt.x) return 1;
+             if (aPt.y < bPt.y) return -1;
+             if (aPt.y > bPt.y) return 1;
+             return 0;
+           } // Warning: 'point' input will be modified and re-used (for performance)
+
+         }]);
+
+         function SweepEvent(point, isLeft) {
+           _classCallCheck(this, SweepEvent);
+
+           if (point.events === undefined) point.events = [this];else point.events.push(this);
+           this.point = point;
+           this.isLeft = isLeft; // this.segment, this.otherSE set by factory
+         }
+
+         _createClass(SweepEvent, [{
+           key: "link",
+           value: function link(other) {
+             if (other.point === this.point) {
+               throw new Error('Tried to link already linked events');

              }
              }

-           });

 
 

-           return newList.join(', ');
-         }
+             var otherEvents = other.point.events;
+
+             for (var i = 0, iMax = otherEvents.length; i < iMax; i++) {
+               var evt = otherEvents[i];
+               this.point.events.push(evt);
+               evt.point = this.point;
+             }
+
+             this.checkForConsuming();
+           }
+           /* Do a pass over our linked events and check to see if any pair
+            * of segments match, and should be consumed. */
+
+         }, {
+           key: "checkForConsuming",
+           value: function checkForConsuming() {
+             // FIXME: The loops in this method run O(n^2) => no good.
+             //        Maintain little ordered sweep event trees?
+             //        Can we maintaining an ordering that avoids the need
+             //        for the re-sorting with getLeftmostComparator in geom-out?
+             // Compare each pair of events to see if other events also match
+             var numEvents = this.point.events.length;
+
+             for (var i = 0; i < numEvents; i++) {
+               var evt1 = this.point.events[i];
+               if (evt1.segment.consumedBy !== undefined) continue;
+
+               for (var j = i + 1; j < numEvents; j++) {
+                 var evt2 = this.point.events[j];
+                 if (evt2.consumedBy !== undefined) continue;
+                 if (evt1.otherSE.point.events !== evt2.otherSE.point.events) continue;
+                 evt1.segment.consume(evt2.segment);
+               }
+             }
+           }
+         }, {
+           key: "getAvailableLinkedEvents",
+           value: function getAvailableLinkedEvents() {
+             // point.events is always of length 2 or greater
+             var events = [];
+
+             for (var i = 0, iMax = this.point.events.length; i < iMax; i++) {
+               var evt = this.point.events[i];
+
+               if (evt !== this && !evt.segment.ringOut && evt.segment.isInResult()) {
+                 events.push(evt);
+               }
+             }
+
+             return events;
+           }
+           /**
+            * Returns a comparator function for sorting linked events that will
+            * favor the event that will give us the smallest left-side angle.
+            * All ring construction starts as low as possible heading to the right,
+            * so by always turning left as sharp as possible we'll get polygons
+            * without uncessary loops & holes.
+            *
+            * The comparator function has a compute cache such that it avoids
+            * re-computing already-computed values.
+            */
+
+         }, {
+           key: "getLeftmostComparator",
+           value: function getLeftmostComparator(baseEvent) {
+             var _this = this;
+
+             var cache = new Map();
+
+             var fillCache = function fillCache(linkedEvent) {
+               var nextEvent = linkedEvent.otherSE;
+               cache.set(linkedEvent, {
+                 sine: sineOfAngle(_this.point, baseEvent.point, nextEvent.point),
+                 cosine: cosineOfAngle(_this.point, baseEvent.point, nextEvent.point)
+               });
+             };

 
 

-         // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...
-         function parse294(capture) {
-           var newList = [];
-           var items = capture.split(',');
+             return function (a, b) {
+               if (!cache.has(a)) fillCache(a);
+               if (!cache.has(b)) fillCache(b);

 
 

-           items.forEach(function (item) {
-             // item of form "from/to node/relation #ID"
-             item = item.split(' ');
+               var _cache$get = cache.get(a),
+                   asine = _cache$get.sine,
+                   acosine = _cache$get.cosine;

 
 

-             // to/from role is more clear in quotes
-             var role = "\"" + (item[0]) + "\"";
+               var _cache$get2 = cache.get(b),
+                   bsine = _cache$get2.sine,
+                   bcosine = _cache$get2.cosine; // both on or above x-axis

 
 

-             // first letter of node/relation provides the type
-             var idType = item[1].slice(0,1);

 
 

-             // ID has # at the front
-             var id = item[2].slice(1);
-             id = linkEntity(idType + id);
+               if (asine >= 0 && bsine >= 0) {
+                 if (acosine < bcosine) return 1;
+                 if (acosine > bcosine) return -1;
+                 return 0;
+               } // both below x-axis

 
 

-             newList.push((role + " " + (item[1]) + " " + id));
-           });

 
 

-           return newList.join(', ');
-         }
+               if (asine < 0 && bsine < 0) {
+                 if (acosine < bcosine) return -1;
+                 if (acosine > bcosine) return 1;
+                 return 0;
+               } // one above x-axis, one below

 
 

-         // may or may not include the string "(including the name 'name')"
-         function parse370(capture) {
-           if (!capture) { return ''; }

 
 

-           var match = capture.match(/\(including the name (\'.+\')\)/);
-           if (match && match.length) {
-             return _t('QA.keepRight.errorTypes.370.including_the_name', { name: match[1] });
+               if (bsine < asine) return -1;
+               if (bsine > asine) return 1;
+               return 0;
+             };

            }
            }

-           return '';
-         }
+         }]);

 
 

-         // arbitrary node list of form: #ID,#ID,#ID...
-         function parse20(capture) {
-           var newList = [];
-           var items = capture.split(',');
+         return SweepEvent;
+       }(); // segments and sweep events when all else is identical

 
 

-           items.forEach(function (item) {
-             // ID has # at the front
-             var id = linkEntity('n' + item.slice(1));
-             newList.push(id);
-           });

 
 

-           return newList.join(', ');
-         }
-       }
+       var segmentId = 0;

 
 

+       var Segment = /*#__PURE__*/function () {
+         _createClass(Segment, null, [{
+           key: "compare",

 
 

-       var serviceKeepRight = {
-         title: 'keepRight',
+           /* This compare() function is for ordering segments in the sweep
+            * line tree, and does so according to the following criteria:
+            *
+            * Consider the vertical line that lies an infinestimal step to the
+            * right of the right-more of the two left endpoints of the input
+            * segments. Imagine slowly moving a point up from negative infinity
+            * in the increasing y direction. Which of the two segments will that
+            * point intersect first? That segment comes 'before' the other one.
+            *
+            * If neither segment would be intersected by such a line, (if one
+            * or more of the segments are vertical) then the line to be considered
+            * is directly on the right-more of the two left inputs.
+            */
+           value: function compare(a, b) {
+             var alx = a.leftSE.point.x;
+             var blx = b.leftSE.point.x;
+             var arx = a.rightSE.point.x;
+             var brx = b.rightSE.point.x; // check if they're even in the same vertical plane
+
+             if (brx < alx) return 1;
+             if (arx < blx) return -1;
+             var aly = a.leftSE.point.y;
+             var bly = b.leftSE.point.y;
+             var ary = a.rightSE.point.y;
+             var bry = b.rightSE.point.y; // is left endpoint of segment B the right-more?
+
+             if (alx < blx) {
+               // are the two segments in the same horizontal plane?
+               if (bly < aly && bly < ary) return 1;
+               if (bly > aly && bly > ary) return -1; // is the B left endpoint colinear to segment A?
+
+               var aCmpBLeft = a.comparePoint(b.leftSE.point);
+               if (aCmpBLeft < 0) return 1;
+               if (aCmpBLeft > 0) return -1; // is the A right endpoint colinear to segment B ?
+
+               var bCmpARight = b.comparePoint(a.rightSE.point);
+               if (bCmpARight !== 0) return bCmpARight; // colinear segments, consider the one with left-more
+               // left endpoint to be first (arbitrary?)

 
 

-         init: function init() {
-           _mainFileFetcher.get('keepRight')
-             .then(function (d) { return _krData = d; });
+               return -1;
+             } // is left endpoint of segment A the right-more?

 
 

-           if (!_cache) {
-             this.reset();
-           }

 
 

-           this.event = utilRebind(this, dispatch$1, 'on');
-         },
+             if (alx > blx) {
+               if (aly < bly && aly < bry) return -1;
+               if (aly > bly && aly > bry) return 1; // is the A left endpoint colinear to segment B?

 
 

-         reset: function reset() {
-           if (_cache) {
-             Object.values(_cache.inflightTile).forEach(abortRequest);
-           }
+               var bCmpALeft = b.comparePoint(a.leftSE.point);
+               if (bCmpALeft !== 0) return bCmpALeft; // is the B right endpoint colinear to segment A?

 
 

-           _cache = {
-             data: {},
-             loadedTile: {},
-             inflightTile: {},
-             inflightPost: {},
-             closed: {},
-             rtree: new RBush()
-           };
-         },
+               var aCmpBRight = a.comparePoint(b.rightSE.point);
+               if (aCmpBRight < 0) return 1;
+               if (aCmpBRight > 0) return -1; // colinear segments, consider the one with left-more
+               // left endpoint to be first (arbitrary?)

 
 

+               return 1;
+             } // if we get here, the two left endpoints are in the same
+             // vertical plane, ie alx === blx
+             // consider the lower left-endpoint to come first

 
 

-         // KeepRight API:  http://osm.mueschelsoft.de/keepright/interfacing.php
-         loadIssues: function loadIssues(projection) {
-           var this$1 = this;

 
 

-           var options = {
-             format: 'geojson',
-             ch: _krRuleset
-           };
+             if (aly < bly) return -1;
+             if (aly > bly) return 1; // left endpoints are identical
+             // check for colinearity by using the left-more right endpoint
+             // is the A right endpoint more left-more?

 
 

-           // determine the needed tiles to cover the view
-           var tiles = tiler
-             .zoomExtent([_tileZoom, _tileZoom])
-             .getTiles(projection);
+             if (arx < brx) {
+               var _bCmpARight = b.comparePoint(a.rightSE.point);

 
 

-           // abort inflight requests that are no longer needed
-           abortUnwantedRequests(_cache, tiles);
+               if (_bCmpARight !== 0) return _bCmpARight;
+             } // is the B right endpoint more left-more?

 
 

-           // issue new requests..
-           tiles.forEach(function (tile) {
-             if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) { return; }
-
-             var ref = tile.extent.rectangle();
-             var left = ref[0];
-             var top = ref[1];
-             var right = ref[2];
-             var bottom = ref[3];
-             var params = Object.assign({}, options, { left: left, bottom: bottom, right: right, top: top });
-             var url = _krUrlRoot + "/export.php?" + utilQsString(params);
-             var controller = new AbortController();

 
 

-             _cache.inflightTile[tile.id] = controller;
+             if (arx > brx) {
+               var _aCmpBRight = a.comparePoint(b.rightSE.point);

 
 

-             d3_json(url, { signal: controller.signal })
-               .then(function (data) {
-                 delete _cache.inflightTile[tile.id];
-                 _cache.loadedTile[tile.id] = true;
-                 if (!data || !data.features || !data.features.length) {
-                   throw new Error('No Data');
-                 }
+               if (_aCmpBRight < 0) return 1;
+               if (_aCmpBRight > 0) return -1;
+             }

 
 

-                 data.features.forEach(function (feature) {
-                   var feature_properties = feature.properties;
-                   var itemType = feature_properties.error_type;
-                   var id = feature_properties.error_id;
-                   var comment = feature_properties.comment; if ( comment === void 0 ) comment = null;
-                   var objectId = feature_properties.object_id;
-                   var objectType = feature_properties.object_type;
-                   var schema = feature_properties.schema;
-                   var title = feature_properties.title;
-                   var loc = feature.geometry.coordinates;
-                   var description = feature.properties.description; if ( description === void 0 ) description = '';
-
-                   // if there is a parent, save its error type e.g.:
-                   //  Error 191 = "highway-highway"
-                   //  Error 190 = "intersections without junctions"  (parent)
-                   var issueTemplate = _krData.errorTypes[itemType];
-                   var parentIssueType = (Math.floor(itemType / 10) * 10).toString();
-
-                   // try to handle error type directly, fallback to parent error type.
-                   var whichType = issueTemplate ? itemType : parentIssueType;
-                   var whichTemplate = _krData.errorTypes[whichType];
-
-                   // Rewrite a few of the errors at this point..
-                   // This is done to make them easier to linkify and translate.
-                   switch (whichType) {
-                     case '170':
-                       description = "This feature has a FIXME tag: " + description;
-                       break;
-                     case '292':
-                     case '293':
-                       description = description.replace('A turn-', 'This turn-');
-                       break;
-                     case '294':
-                     case '295':
-                     case '296':
-                     case '297':
-                     case '298':
-                       description = "This turn-restriction~" + description;
-                       break;
-                     case '300':
-                       description = 'This highway is missing a maxspeed tag';
-                       break;
-                     case '411':
-                     case '412':
-                     case '413':
-                       description = "This feature~" + description;
-                       break;
-                   }
+             if (arx !== brx) {
+               // are these two [almost] vertical segments with opposite orientation?
+               // if so, the one with the lower right endpoint comes first
+               var ay = ary - aly;
+               var ax = arx - alx;
+               var by = bry - bly;
+               var bx = brx - blx;
+               if (ay > ax && by < bx) return 1;
+               if (ay < ax && by > bx) return -1;
+             } // we have colinear segments with matching orientation
+             // consider the one with more left-more right endpoint to be first

 
 

-                   // move markers slightly so it doesn't obscure the geometry,
-                   // then move markers away from other coincident markers
-                   var coincident = false;
-                   do {
-                     // first time, move marker up. after that, move marker right.
-                     var delta = coincident ? [0.00001, 0] : [0, 0.00001];
-                     loc = geoVecAdd(loc, delta);
-                     var bbox = geoExtent(loc).bbox();
-                     coincident = _cache.rtree.search(bbox).length;
-                   } while (coincident);
-
-                   var d = new QAItem(loc, this$1, itemType, id, {
-                     comment: comment,
-                     description: description,
-                     whichType: whichType,
-                     parentIssueType: parentIssueType,
-                     severity: whichTemplate.severity || 'error',
-                     objectId: objectId,
-                     objectType: objectType,
-                     schema: schema,
-                     title: title
-                   });

 
 

-                   d.replacements = tokenReplacements(d);
+             if (arx > brx) return 1;
+             if (arx < brx) return -1; // if we get here, two two right endpoints are in the same
+             // vertical plane, ie arx === brx
+             // consider the lower right-endpoint to come first

 
 

-                   _cache.data[id] = d;
-                   _cache.rtree.insert(encodeIssueRtree(d));
-                 });
+             if (ary < bry) return -1;
+             if (ary > bry) return 1; // right endpoints identical as well, so the segments are idential
+             // fall back on creation order as consistent tie-breaker

 
 

-                 dispatch$1.call('loaded');
-               })
-               .catch(function () {
-                 delete _cache.inflightTile[tile.id];
-                 _cache.loadedTile[tile.id] = true;
-               });
+             if (a.id < b.id) return -1;
+             if (a.id > b.id) return 1; // identical segment, ie a === b

 
 

-           });
-         },
+             return 0;
+           }
+           /* Warning: a reference to ringWindings input will be stored,
+            *  and possibly will be later modified */

 
 

+         }]);

 
 

-         postUpdate: function postUpdate(d, callback) {
-           var this$1 = this;
+         function Segment(leftSE, rightSE, rings, windings) {
+           _classCallCheck(this, Segment);

 
 

-           if (_cache.inflightPost[d.id]) {
-             return callback({ message: 'Error update already inflight', status: -2 }, d);
-           }
+           this.id = ++segmentId;
+           this.leftSE = leftSE;
+           leftSE.segment = this;
+           leftSE.otherSE = rightSE;
+           this.rightSE = rightSE;
+           rightSE.segment = this;
+           rightSE.otherSE = leftSE;
+           this.rings = rings;
+           this.windings = windings; // left unset for performance, set later in algorithm
+           // this.ringOut, this.consumedBy, this.prev
+         }

 
 

-           var params = { schema: d.schema, id: d.id };
+         _createClass(Segment, [{
+           key: "replaceRightSE",

 
 

-           if (d.newStatus) {
-             params.st = d.newStatus;
+           /* When a segment is split, the rightSE is replaced with a new sweep event */
+           value: function replaceRightSE(newRightSE) {
+             this.rightSE = newRightSE;
+             this.rightSE.segment = this;
+             this.rightSE.otherSE = this.leftSE;
+             this.leftSE.otherSE = this.rightSE;

            }
            }

-           if (d.newComment !== undefined) {
-             params.co = d.newComment;
+         }, {
+           key: "bbox",
+           value: function bbox() {
+             var y1 = this.leftSE.point.y;
+             var y2 = this.rightSE.point.y;
+             return {
+               ll: {
+                 x: this.leftSE.point.x,
+                 y: y1 < y2 ? y1 : y2
+               },
+               ur: {
+                 x: this.rightSE.point.x,
+                 y: y1 > y2 ? y1 : y2
+               }
+             };

            }
            }

+           /* A vector from the left point to the right */

 
 

-           // NOTE: This throws a CORS err, but it seems successful.
-           // We don't care too much about the response, so this is fine.
-           var url = _krUrlRoot + "/comment.php?" + utilQsString(params);
-           var controller = new AbortController();
+         }, {
+           key: "vector",
+           value: function vector() {
+             return {
+               x: this.rightSE.point.x - this.leftSE.point.x,
+               y: this.rightSE.point.y - this.leftSE.point.y
+             };
+           }
+         }, {
+           key: "isAnEndpoint",
+           value: function isAnEndpoint(pt) {
+             return pt.x === this.leftSE.point.x && pt.y === this.leftSE.point.y || pt.x === this.rightSE.point.x && pt.y === this.rightSE.point.y;
+           }
+           /* Compare this segment with a point.
+            *
+            * A point P is considered to be colinear to a segment if there
+            * exists a distance D such that if we travel along the segment
+            * from one * endpoint towards the other a distance D, we find
+            * ourselves at point P.
+            *
+            * Return value indicates:
+            *
+            *   1: point lies above the segment (to the left of vertical)
+            *   0: point is colinear to segment
+            *  -1: point lies below the segment (to the right of vertical)
+            */

 
 

-           _cache.inflightPost[d.id] = controller;
+         }, {
+           key: "comparePoint",
+           value: function comparePoint(point) {
+             if (this.isAnEndpoint(point)) return 0;
+             var lPt = this.leftSE.point;
+             var rPt = this.rightSE.point;
+             var v = this.vector(); // Exactly vertical segments.
+
+             if (lPt.x === rPt.x) {
+               if (point.x === lPt.x) return 0;
+               return point.x < lPt.x ? 1 : -1;
+             } // Nearly vertical segments with an intersection.
+             // Check to see where a point on the line with matching Y coordinate is.
+
+
+             var yDist = (point.y - lPt.y) / v.y;
+             var xFromYDist = lPt.x + yDist * v.x;
+             if (point.x === xFromYDist) return 0; // General case.
+             // Check to see where a point on the line with matching X coordinate is.
+
+             var xDist = (point.x - lPt.x) / v.x;
+             var yFromXDist = lPt.y + xDist * v.y;
+             if (point.y === yFromXDist) return 0;
+             return point.y < yFromXDist ? -1 : 1;
+           }
+           /**
+            * Given another segment, returns the first non-trivial intersection
+            * between the two segments (in terms of sweep line ordering), if it exists.
+            *
+            * A 'non-trivial' intersection is one that will cause one or both of the
+            * segments to be split(). As such, 'trivial' vs. 'non-trivial' intersection:
+            *
+            *   * endpoint of segA with endpoint of segB --> trivial
+            *   * endpoint of segA with point along segB --> non-trivial
+            *   * endpoint of segB with point along segA --> non-trivial
+            *   * point along segA with point along segB --> non-trivial
+            *
+            * If no non-trivial intersection exists, return null
+            * Else, return null.
+            */

 
 

-           // Since this is expected to throw an error just continue as if it worked
-           // (worst case scenario the request truly fails and issue will show up if iD restarts)
-           d3_json(url, { signal: controller.signal })
-             .finally(function () {
-               delete _cache.inflightPost[d.id];
-
-               if (d.newStatus === 'ignore') {
-                 // ignore permanently (false positive)
-                 this$1.removeItem(d);
-               } else if (d.newStatus === 'ignore_t') {
-                 // ignore temporarily (error fixed)
-                 this$1.removeItem(d);
-                 _cache.closed[((d.schema) + ":" + (d.id))] = true;
-               } else {
-                 d = this$1.replaceItem(d.update({
-                   comment: d.newComment,
-                   newComment: undefined,
-                   newState: undefined
-                 }));
-               }
+         }, {
+           key: "getIntersection",
+           value: function getIntersection(other) {
+             // If bboxes don't overlap, there can't be any intersections
+             var tBbox = this.bbox();
+             var oBbox = other.bbox();
+             var bboxOverlap = getBboxOverlap(tBbox, oBbox);
+             if (bboxOverlap === null) return null; // We first check to see if the endpoints can be considered intersections.
+             // This will 'snap' intersections to endpoints if possible, and will
+             // handle cases of colinearity.
+
+             var tlp = this.leftSE.point;
+             var trp = this.rightSE.point;
+             var olp = other.leftSE.point;
+             var orp = other.rightSE.point; // does each endpoint touch the other segment?
+             // note that we restrict the 'touching' definition to only allow segments
+             // to touch endpoints that lie forward from where we are in the sweep line pass
+
+             var touchesOtherLSE = isInBbox(tBbox, olp) && this.comparePoint(olp) === 0;
+             var touchesThisLSE = isInBbox(oBbox, tlp) && other.comparePoint(tlp) === 0;
+             var touchesOtherRSE = isInBbox(tBbox, orp) && this.comparePoint(orp) === 0;
+             var touchesThisRSE = isInBbox(oBbox, trp) && other.comparePoint(trp) === 0; // do left endpoints match?
+
+             if (touchesThisLSE && touchesOtherLSE) {
+               // these two cases are for colinear segments with matching left
+               // endpoints, and one segment being longer than the other
+               if (touchesThisRSE && !touchesOtherRSE) return trp;
+               if (!touchesThisRSE && touchesOtherRSE) return orp; // either the two segments match exactly (two trival intersections)
+               // or just on their left endpoint (one trivial intersection

 
 

-               if (callback) { callback(null, d); }
-             });
-         },
+               return null;
+             } // does this left endpoint matches (other doesn't)

 
 

-         // Get all cached QAItems covering the viewport
-         getItems: function getItems(projection) {
-           var viewport = projection.clipExtent();
-           var min = [viewport[0][0], viewport[1][1]];
-           var max = [viewport[1][0], viewport[0][1]];
-           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();

 
 

-           return _cache.rtree.search(bbox).map(function (d) { return d.data; });
-         },
+             if (touchesThisLSE) {
+               // check for segments that just intersect on opposing endpoints
+               if (touchesOtherRSE) {
+                 if (tlp.x === orp.x && tlp.y === orp.y) return null;
+               } // t-intersection on left endpoint

 
 

-         // Get a QAItem from cache
-         // NOTE: Don't change method name until UI v3 is merged
-         getError: function getError(id) {
-           return _cache.data[id];
-         },

 
 

-         // Replace a single QAItem in the cache
-         replaceItem: function replaceItem(item) {
-           if (!(item instanceof QAItem) || !item.id) { return; }
+               return tlp;
+             } // does other left endpoint matches (this doesn't)

 
 

-           _cache.data[item.id] = item;
-           updateRtree(encodeIssueRtree(item), true); // true = replace
-           return item;
-         },

 
 

-         // Remove a single QAItem from the cache
-         removeItem: function removeItem(item) {
-           if (!(item instanceof QAItem) || !item.id) { return; }
+             if (touchesOtherLSE) {
+               // check for segments that just intersect on opposing endpoints
+               if (touchesThisRSE) {
+                 if (trp.x === olp.x && trp.y === olp.y) return null;
+               } // t-intersection on left endpoint

 
 

-           delete _cache.data[item.id];
-           updateRtree(encodeIssueRtree(item), false); // false = remove
-         },

 
 

-         issueURL: function issueURL(item) {
-           return (_krUrlRoot + "/report_map.php?schema=" + (item.schema) + "&error=" + (item.id));
-         },
+               return olp;
+             } // trivial intersection on right endpoints

 
 

-         // Get an array of issues closed during this session.
-         // Used to populate `closed:keepright` changeset tag
-         getClosedIDs: function getClosedIDs() {
-           return Object.keys(_cache.closed).sort();
-         }

 
 

-       };
+             if (touchesThisRSE && touchesOtherRSE) return null; // t-intersections on just one right endpoint

 
 

-       var tiler$1 = utilTiler();
-       var dispatch$2 = dispatch('loaded');
-       var _tileZoom$1 = 14;
-       var _impOsmUrls = {
-         ow: 'https://grab.community.improve-osm.org/directionOfFlowService',
-         mr: 'https://grab.community.improve-osm.org/missingGeoService',
-         tr: 'https://grab.community.improve-osm.org/turnRestrictionService'
-       };
-       var _impOsmData = { icons: {} };
+             if (touchesThisRSE) return trp;
+             if (touchesOtherRSE) return orp; // None of our endpoints intersect. Look for a general intersection between
+             // infinite lines laid over the segments

 
 

+             var pt = intersection(tlp, this.vector(), olp, other.vector()); // are the segments parrallel? Note that if they were colinear with overlap,
+             // they would have an endpoint intersection and that case was already handled above

 
 

-       // This gets reassigned if reset
-       var _cache$1;
+             if (pt === null) return null; // is the intersection found between the lines not on the segments?

 
 

-       function abortRequest$1(i) {
-         Object.values(i).forEach(function (controller) {
-           if (controller) {
-             controller.abort();
-           }
-         });
-       }
+             if (!isInBbox(bboxOverlap, pt)) return null; // round the the computed point if needed

 
 

-       function abortUnwantedRequests$1(cache, tiles) {
-         Object.keys(cache.inflightTile).forEach(function (k) {
-           var wanted = tiles.find(function (tile) { return k === tile.id; });
-           if (!wanted) {
-             abortRequest$1(cache.inflightTile[k]);
-             delete cache.inflightTile[k];
+             return rounder.round(pt.x, pt.y);

            }
            }

-         });
-       }
+           /**
+            * Split the given segment into multiple segments on the given points.
+            *  * Each existing segment will retain its leftSE and a new rightSE will be
+            *    generated for it.
+            *  * A new segment will be generated which will adopt the original segment's
+            *    rightSE, and a new leftSE will be generated for it.
+            *  * If there are more than two points given to split on, new segments
+            *    in the middle will be generated with new leftSE and rightSE's.
+            *  * An array of the newly generated SweepEvents will be returned.
+            *
+            * Warning: input array of points is modified
+            */

 
 

-       function encodeIssueRtree$1(d) {
-         return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-       }
+         }, {
+           key: "split",
+           value: function split(point) {
+             var newEvents = [];
+             var alreadyLinked = point.events !== undefined;
+             var newLeftSE = new SweepEvent(point, true);
+             var newRightSE = new SweepEvent(point, false);
+             var oldRightSE = this.rightSE;
+             this.replaceRightSE(newRightSE);
+             newEvents.push(newRightSE);
+             newEvents.push(newLeftSE);
+             var newSeg = new Segment(newLeftSE, oldRightSE, this.rings.slice(), this.windings.slice()); // when splitting a nearly vertical downward-facing segment,
+             // sometimes one of the resulting new segments is vertical, in which
+             // case its left and right events may need to be swapped
+
+             if (SweepEvent.comparePoints(newSeg.leftSE.point, newSeg.rightSE.point) > 0) {
+               newSeg.swapEvents();
+             }

 
 

-       // Replace or remove QAItem from rtree
-       function updateRtree$1(item, replace) {
-         _cache$1.rtree.remove(item, function (a, b) { return a.data.id === b.data.id; });
+             if (SweepEvent.comparePoints(this.leftSE.point, this.rightSE.point) > 0) {
+               this.swapEvents();
+             } // in the point we just used to create new sweep events with was already
+             // linked to other events, we need to check if either of the affected
+             // segments should be consumed

 
 

-         if (replace) {
-           _cache$1.rtree.insert(item);
-         }
-       }

 
 

-       function linkErrorObject(d) {
-         return ("<a class=\"error_object_link\">" + d + "</a>");
-       }
+             if (alreadyLinked) {
+               newLeftSE.checkForConsuming();
+               newRightSE.checkForConsuming();
+             }

 
 

-       function linkEntity(d) {
-         return ("<a class=\"error_entity_link\">" + d + "</a>");
-       }
+             return newEvents;
+           }
+           /* Swap which event is left and right */

 
 

-       function pointAverage(points) {
-         if (points.length) {
-           var sum = points.reduce(
-             function (acc, point) { return geoVecAdd(acc, [point.lon, point.lat]); },
-             [0,0]
-           );
-           return geoVecScale(sum, 1 / points.length);
-         } else {
-           return [0,0];
-         }
-       }
+         }, {
+           key: "swapEvents",
+           value: function swapEvents() {
+             var tmpEvt = this.rightSE;
+             this.rightSE = this.leftSE;
+             this.leftSE = tmpEvt;
+             this.leftSE.isLeft = true;
+             this.rightSE.isLeft = false;
+
+             for (var i = 0, iMax = this.windings.length; i < iMax; i++) {
+               this.windings[i] *= -1;
+             }
+           }
+           /* Consume another segment. We take their rings under our wing
+            * and mark them as consumed. Use for perfectly overlapping segments */

 
 

-       function relativeBearing(p1, p2) {
-         var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
-         if (angle < 0) {
-           angle += 2 * Math.PI;
-         }
+         }, {
+           key: "consume",
+           value: function consume(other) {
+             var consumer = this;
+             var consumee = other;

 
 

-         // Return degrees
-         return angle * 180 / Math.PI;
-       }
+             while (consumer.consumedBy) {
+               consumer = consumer.consumedBy;
+             }

 
 

-       // Assuming range [0,360)
-       function cardinalDirection(bearing) {
-         var dir = 45 * Math.round(bearing / 45);
-         var compass = {
-           0: 'north',
-           45: 'northeast',
-           90: 'east',
-           135: 'southeast',
-           180: 'south',
-           225: 'southwest',
-           270: 'west',
-           315: 'northwest',
-           360: 'north'
-         };
+             while (consumee.consumedBy) {
+               consumee = consumee.consumedBy;
+             }

 
 

-         return _t(("QA.improveOSM.directions." + (compass[dir])));
-       }
+             var cmp = Segment.compare(consumer, consumee);
+             if (cmp === 0) return; // already consumed
+             // the winner of the consumption is the earlier segment
+             // according to sweep line ordering

 
 

-       // Errors shouldn't obscure eachother
-       function preventCoincident(loc, bumpUp) {
-         var coincident = false;
-         do {
-           // first time, move marker up. after that, move marker right.
-           var delta = coincident ? [0.00001, 0] : (bumpUp ? [0, 0.00001] : [0, 0]);
-           loc = geoVecAdd(loc, delta);
-           var bbox = geoExtent(loc).bbox();
-           coincident = _cache$1.rtree.search(bbox).length;
-         } while (coincident);
+             if (cmp > 0) {
+               var tmp = consumer;
+               consumer = consumee;
+               consumee = tmp;
+             } // make sure a segment doesn't consume it's prev

 
 

-         return loc;
-       }

 
 

-       var serviceImproveOSM = {
-         title: 'improveOSM',
+             if (consumer.prev === consumee) {
+               var _tmp = consumer;
+               consumer = consumee;
+               consumee = _tmp;
+             }

 
 

-         init: function init() {
-           _mainFileFetcher.get('qa_data')
-             .then(function (d) { return _impOsmData = d.improveOSM; });
+             for (var i = 0, iMax = consumee.rings.length; i < iMax; i++) {
+               var ring = consumee.rings[i];
+               var winding = consumee.windings[i];
+               var index = consumer.rings.indexOf(ring);

 
 

-           if (!_cache$1) {
-             this.reset();
-           }
+               if (index === -1) {
+                 consumer.rings.push(ring);
+                 consumer.windings.push(winding);
+               } else consumer.windings[index] += winding;
+             }

 
 

-           this.event = utilRebind(this, dispatch$2, 'on');
-         },
+             consumee.rings = null;
+             consumee.windings = null;
+             consumee.consumedBy = consumer; // mark sweep events consumed as to maintain ordering in sweep event queue

 
 

-         reset: function reset() {
-           if (_cache$1) {
-             Object.values(_cache$1.inflightTile).forEach(abortRequest$1);
+             consumee.leftSE.consumedBy = consumer.leftSE;
+             consumee.rightSE.consumedBy = consumer.rightSE;

            }
            }

-           _cache$1 = {
-             data: {},
-             loadedTile: {},
-             inflightTile: {},
-             inflightPost: {},
-             closed: {},
-             rtree: new RBush()
-           };
-         },
+           /* The first segment previous segment chain that is in the result */

 
 

-         loadIssues: function loadIssues(projection) {
-           var this$1 = this;
+         }, {
+           key: "prevInResult",
+           value: function prevInResult() {
+             if (this._prevInResult !== undefined) return this._prevInResult;
+             if (!this.prev) this._prevInResult = null;else if (this.prev.isInResult()) this._prevInResult = this.prev;else this._prevInResult = this.prev.prevInResult();
+             return this._prevInResult;
+           }
+         }, {
+           key: "beforeState",
+           value: function beforeState() {
+             if (this._beforeState !== undefined) return this._beforeState;
+             if (!this.prev) this._beforeState = {
+               rings: [],
+               windings: [],
+               multiPolys: []
+             };else {
+               var seg = this.prev.consumedBy || this.prev;
+               this._beforeState = seg.afterState();
+             }
+             return this._beforeState;
+           }
+         }, {
+           key: "afterState",
+           value: function afterState() {
+             if (this._afterState !== undefined) return this._afterState;
+             var beforeState = this.beforeState();
+             this._afterState = {
+               rings: beforeState.rings.slice(0),
+               windings: beforeState.windings.slice(0),
+               multiPolys: []
+             };
+             var ringsAfter = this._afterState.rings;
+             var windingsAfter = this._afterState.windings;
+             var mpsAfter = this._afterState.multiPolys; // calculate ringsAfter, windingsAfter

 
 

-           var options = {
-             client: 'iD',
-             status: 'OPEN',
-             zoom: '19' // Use a high zoom so that clusters aren't returned
-           };
+             for (var i = 0, iMax = this.rings.length; i < iMax; i++) {
+               var ring = this.rings[i];
+               var winding = this.windings[i];
+               var index = ringsAfter.indexOf(ring);

 
 

-           // determine the needed tiles to cover the view
-           var tiles = tiler$1
-             .zoomExtent([_tileZoom$1, _tileZoom$1])
-             .getTiles(projection);
+               if (index === -1) {
+                 ringsAfter.push(ring);
+                 windingsAfter.push(winding);
+               } else windingsAfter[index] += winding;
+             } // calcualte polysAfter

 
 

-           // abort inflight requests that are no longer needed
-           abortUnwantedRequests$1(_cache$1, tiles);

 
 

-           // issue new requests..
-           tiles.forEach(function (tile) {
-             if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) { return; }
+             var polysAfter = [];
+             var polysExclude = [];

 
 

-             var ref = tile.extent.rectangle();
-             var east = ref[0];
-             var north = ref[1];
-             var west = ref[2];
-             var south = ref[3];
-             var params = Object.assign({}, options, { east: east, south: south, west: west, north: north });
+             for (var _i = 0, _iMax = ringsAfter.length; _i < _iMax; _i++) {
+               if (windingsAfter[_i] === 0) continue; // non-zero rule

 
 

-             // 3 separate requests to store for each tile
-             var requests = {};
+               var _ring = ringsAfter[_i];
+               var poly = _ring.poly;
+               if (polysExclude.indexOf(poly) !== -1) continue;
+               if (_ring.isExterior) polysAfter.push(poly);else {
+                 if (polysExclude.indexOf(poly) === -1) polysExclude.push(poly);

 
 

-             Object.keys(_impOsmUrls).forEach(function (k) {
-               // We exclude WATER from missing geometry as it doesn't seem useful
-               // We use most confident one-way and turn restrictions only, still have false positives
-               var kParams = Object.assign({},
-                 params,
-                 (k === 'mr') ? { type: 'PARKING,ROAD,BOTH,PATH' } : { confidenceLevel: 'C1' }
-               );
-               var url = (_impOsmUrls[k]) + "/search?" + utilQsString(kParams);
-               var controller = new AbortController();
+                 var _index = polysAfter.indexOf(_ring.poly);

 
 

-               requests[k] = controller;
+                 if (_index !== -1) polysAfter.splice(_index, 1);
+               }
+             } // calculate multiPolysAfter

 
 

-               d3_json(url, { signal: controller.signal })
-                 .then(function (data) {
-                   delete _cache$1.inflightTile[tile.id][k];
-                   if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
-                     delete _cache$1.inflightTile[tile.id];
-                     _cache$1.loadedTile[tile.id] = true;
-                   }

 
 

-                   // Road segments at high zoom == oneways
-                   if (data.roadSegments) {
-                     data.roadSegments.forEach(function (feature) {
-                       // Position error at the approximate middle of the segment
-                       var points = feature.points;
-                       var wayId = feature.wayId;
-                       var fromNodeId = feature.fromNodeId;
-                       var toNodeId = feature.toNodeId;
-                       var itemId = "" + wayId + fromNodeId + toNodeId;
-                       var mid = points.length / 2;
-                       var loc;
-
-                       // Even number of points, find midpoint of the middle two
-                       // Odd number of points, use position of very middle point
-                       if (mid % 1 === 0) {
-                         loc = pointAverage([points[mid - 1], points[mid]]);
-                       } else {
-                         mid = points[Math.floor(mid)];
-                         loc = [mid.lon, mid.lat];
-                       }
+             for (var _i2 = 0, _iMax2 = polysAfter.length; _i2 < _iMax2; _i2++) {
+               var mp = polysAfter[_i2].multiPoly;
+               if (mpsAfter.indexOf(mp) === -1) mpsAfter.push(mp);
+             }

 
 

-                       // One-ways can land on same segment in opposite direction
-                       loc = preventCoincident(loc, false);
-
-                       var d = new QAItem(loc, this$1, k, itemId, {
-                         issueKey: k, // used as a category
-                         identifier: { // used to post changes
-                           wayId: wayId,
-                           fromNodeId: fromNodeId,
-                           toNodeId: toNodeId
-                         },
-                         objectId: wayId,
-                         objectType: 'way'
-                       });
+             return this._afterState;
+           }
+           /* Is this segment part of the final result? */

 
 

-                       // Variables used in the description
-                       d.replacements = {
-                         percentage: feature.percentOfTrips,
-                         num_trips: feature.numberOfTrips,
-                         highway: linkErrorObject(_t('QA.keepRight.error_parts.highway')),
-                         from_node: linkEntity('n' + feature.fromNodeId),
-                         to_node: linkEntity('n' + feature.toNodeId)
-                       };
+         }, {
+           key: "isInResult",
+           value: function isInResult() {
+             // if we've been consumed, we're not in the result
+             if (this.consumedBy) return false;
+             if (this._isInResult !== undefined) return this._isInResult;
+             var mpsBefore = this.beforeState().multiPolys;
+             var mpsAfter = this.afterState().multiPolys;
+
+             switch (operation.type) {
+               case 'union':
+                 {
+                   // UNION - included iff:
+                   //  * On one side of us there is 0 poly interiors AND
+                   //  * On the other side there is 1 or more.
+                   var noBefores = mpsBefore.length === 0;
+                   var noAfters = mpsAfter.length === 0;
+                   this._isInResult = noBefores !== noAfters;
+                   break;
+                 }

 
 

-                       _cache$1.data[d.id] = d;
-                       _cache$1.rtree.insert(encodeIssueRtree$1(d));
-                     });
+               case 'intersection':
+                 {
+                   // INTERSECTION - included iff:
+                   //  * on one side of us all multipolys are rep. with poly interiors AND
+                   //  * on the other side of us, not all multipolys are repsented
+                   //    with poly interiors
+                   var least;
+                   var most;
+
+                   if (mpsBefore.length < mpsAfter.length) {
+                     least = mpsBefore.length;
+                     most = mpsAfter.length;
+                   } else {
+                     least = mpsAfter.length;
+                     most = mpsBefore.length;

                    }
 
                    }
 

-                   // Tiles at high zoom == missing roads
-                   if (data.tiles) {
-                     data.tiles.forEach(function (feature) {
-                       var type = feature.type;
-                       var x = feature.x;
-                       var y = feature.y;
-                       var numberOfTrips = feature.numberOfTrips;
-                       var geoType = type.toLowerCase();
-                       var itemId = "" + geoType + x + y + numberOfTrips;
-
-                       // Average of recorded points should land on the missing geometry
-                       // Missing geometry could happen to land on another error
-                       var loc = pointAverage(feature.points);
-                       loc = preventCoincident(loc, false);
-
-                       var d = new QAItem(loc, this$1, (k + "-" + geoType), itemId, {
-                         issueKey: k,
-                         identifier: { x: x, y: y }
-                       });
+                   this._isInResult = most === operation.numMultiPolys && least < most;
+                   break;
+                 }

 
 

-                       d.replacements = {
-                         num_trips: numberOfTrips,
-                         geometry_type: _t(("QA.improveOSM.geometry_types." + geoType))
-                       };
+               case 'xor':
+                 {
+                   // XOR - included iff:
+                   //  * the difference between the number of multipolys represented
+                   //    with poly interiors on our two sides is an odd number
+                   var diff = Math.abs(mpsBefore.length - mpsAfter.length);
+                   this._isInResult = diff % 2 === 1;
+                   break;
+                 }

 
 

-                       // -1 trips indicates data came from a 3rd party
-                       if (numberOfTrips === -1) {
-                         d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
-                       }
+               case 'difference':
+                 {
+                   // DIFFERENCE included iff:
+                   //  * on exactly one side, we have just the subject
+                   var isJustSubject = function isJustSubject(mps) {
+                     return mps.length === 1 && mps[0].isSubject;
+                   };

 
 

-                       _cache$1.data[d.id] = d;
-                       _cache$1.rtree.insert(encodeIssueRtree$1(d));
-                     });
-                   }
+                   this._isInResult = isJustSubject(mpsBefore) !== isJustSubject(mpsAfter);
+                   break;
+                 }

 
 

-                   // Entities at high zoom == turn restrictions
-                   if (data.entities) {
-                     data.entities.forEach(function (feature) {
-                       var point = feature.point;
-                       var id = feature.id;
-                       var segments = feature.segments;
-                       var numberOfPasses = feature.numberOfPasses;
-                       var turnType = feature.turnType;
-                       var itemId = "" + (id.replace(/[,:+#]/g, '_'));
-
-                       // Turn restrictions could be missing at same junction
-                       // We also want to bump the error up so node is accessible
-                       var loc = preventCoincident([point.lon, point.lat], true);
-
-                       // Elements are presented in a strange way
-                       var ids = id.split(',');
-                       var from_way = ids[0];
-                       var via_node = ids[3];
-                       var to_way = ids[2].split(':')[1];
-
-                       var d = new QAItem(loc, this$1, k, itemId, {
-                         issueKey: k,
-                         identifier: id,
-                         objectId: via_node,
-                         objectType: 'node'
-                       });
+               default:
+                 throw new Error("Unrecognized operation type found ".concat(operation.type));
+             }

 
 

-                       // Travel direction along from_way clarifies the turn restriction
-                       var ref = segments[0].points;
-                       var p1 = ref[0];
-                       var p2 = ref[1];
-                       var dir_of_travel = cardinalDirection(relativeBearing(p1, p2));
-
-                       // Variables used in the description
-                       d.replacements = {
-                         num_passed: numberOfPasses,
-                         num_trips: segments[0].numberOfTrips,
-                         turn_restriction: turnType.toLowerCase(),
-                         from_way: linkEntity('w' + from_way),
-                         to_way: linkEntity('w' + to_way),
-                         travel_direction: dir_of_travel,
-                         junction: linkErrorObject(_t('QA.keepRight.error_parts.this_node'))
-                       };
+             return this._isInResult;
+           }
+         }], [{
+           key: "fromRing",
+           value: function fromRing(pt1, pt2, ring) {
+             var leftPt, rightPt, winding; // ordering the two points according to sweep line ordering

 
 

-                       _cache$1.data[d.id] = d;
-                       _cache$1.rtree.insert(encodeIssueRtree$1(d));
-                       dispatch$2.call('loaded');
-                     });
-                   }
-                 })
-                 .catch(function () {
-                   delete _cache$1.inflightTile[tile.id][k];
-                   if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
-                     delete _cache$1.inflightTile[tile.id];
-                     _cache$1.loadedTile[tile.id] = true;
-                   }
-                 });
-             });
+             var cmpPts = SweepEvent.comparePoints(pt1, pt2);

 
 

-             _cache$1.inflightTile[tile.id] = requests;
-           });
-         },
+             if (cmpPts < 0) {
+               leftPt = pt1;
+               rightPt = pt2;
+               winding = 1;
+             } else if (cmpPts > 0) {
+               leftPt = pt2;
+               rightPt = pt1;
+               winding = -1;
+             } else throw new Error("Tried to create degenerate segment at [".concat(pt1.x, ", ").concat(pt1.y, "]"));

 
 

-         getComments: function getComments(item) {
-           var this$1 = this;
+             var leftSE = new SweepEvent(leftPt, true);
+             var rightSE = new SweepEvent(rightPt, false);
+             return new Segment(leftSE, rightSE, [ring], [winding]);
+           }
+         }]);

 
 

-           // If comments already retrieved no need to do so again
-           if (item.comments) {
-             return Promise.resolve(item);
+         return Segment;
+       }();
+
+       var RingIn = /*#__PURE__*/function () {
+         function RingIn(geomRing, poly, isExterior) {
+           _classCallCheck(this, RingIn);
+
+           if (!Array.isArray(geomRing) || geomRing.length === 0) {
+             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');

            }
 
            }
 

-           var key = item.issueKey;
-           var qParams = {};
+           this.poly = poly;
+           this.isExterior = isExterior;
+           this.segments = [];

 
 

-           if (key === 'ow') {
-             qParams = item.identifier;
-           } else if (key === 'mr') {
-             qParams.tileX = item.identifier.x;
-             qParams.tileY = item.identifier.y;
-           } else if (key === 'tr') {
-             qParams.targetId = item.identifier;
+           if (typeof geomRing[0][0] !== 'number' || typeof geomRing[0][1] !== 'number') {
+             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');

            }
 
            }
 

-           var url = (_impOsmUrls[key]) + "/retrieveComments?" + utilQsString(qParams);
-           var cacheComments = function (data) {
-             // Assign directly for immediate use afterwards
-             // comments are served newest to oldest
-             item.comments = data.comments ? data.comments.reverse() : [];
-             this$1.replaceItem(item);
+           var firstPoint = rounder.round(geomRing[0][0], geomRing[0][1]);
+           this.bbox = {
+             ll: {
+               x: firstPoint.x,
+               y: firstPoint.y
+             },
+             ur: {
+               x: firstPoint.x,
+               y: firstPoint.y
+             }

            };
            };

+           var prevPoint = firstPoint;

 
 

-           return d3_json(url).then(cacheComments).then(function () { return item; });
-         },
+           for (var i = 1, iMax = geomRing.length; i < iMax; i++) {
+             if (typeof geomRing[i][0] !== 'number' || typeof geomRing[i][1] !== 'number') {
+               throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+             }

 
 

-         postUpdate: function postUpdate(d, callback) {
-           if (!serviceOsm.authenticated()) { // Username required in payload
-             return callback({ message: 'Not Authenticated', status: -3}, d);
+             var point = rounder.round(geomRing[i][0], geomRing[i][1]); // skip repeated points
+
+             if (point.x === prevPoint.x && point.y === prevPoint.y) continue;
+             this.segments.push(Segment.fromRing(prevPoint, point, this));
+             if (point.x < this.bbox.ll.x) this.bbox.ll.x = point.x;
+             if (point.y < this.bbox.ll.y) this.bbox.ll.y = point.y;
+             if (point.x > this.bbox.ur.x) this.bbox.ur.x = point.x;
+             if (point.y > this.bbox.ur.y) this.bbox.ur.y = point.y;
+             prevPoint = point;
+           } // add segment from last to first if last is not the same as first
+
+
+           if (firstPoint.x !== prevPoint.x || firstPoint.y !== prevPoint.y) {
+             this.segments.push(Segment.fromRing(prevPoint, firstPoint, this));

            }
            }

-           if (_cache$1.inflightPost[d.id]) {
-             return callback({ message: 'Error update already inflight', status: -2 }, d);
+         }
+
+         _createClass(RingIn, [{
+           key: "getSweepEvents",
+           value: function getSweepEvents() {
+             var sweepEvents = [];
+
+             for (var i = 0, iMax = this.segments.length; i < iMax; i++) {
+               var segment = this.segments[i];
+               sweepEvents.push(segment.leftSE);
+               sweepEvents.push(segment.rightSE);
+             }
+
+             return sweepEvents;

            }
            }

+         }]);

 
 

-           // Payload can only be sent once username is established
-           serviceOsm.userDetails(sendPayload.bind(this));
+         return RingIn;
+       }();

 
 

-           function sendPayload(err, user) {
-             var this$1 = this;
+       var PolyIn = /*#__PURE__*/function () {
+         function PolyIn(geomPoly, multiPoly) {
+           _classCallCheck(this, PolyIn);

 
 

-             if (err) { return callback(err, d); }
+           if (!Array.isArray(geomPoly)) {
+             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+           }

 
 

-             var key = d.issueKey;
-             var url = (_impOsmUrls[key]) + "/comment";
-             var payload = {
-               username: user.display_name,
-               targetIds: [ d.identifier ]
-             };
+           this.exteriorRing = new RingIn(geomPoly[0], this, true); // copy by value

 
 

-             if (d.newStatus) {
-               payload.status = d.newStatus;
-               payload.text = 'status changed';
+           this.bbox = {
+             ll: {
+               x: this.exteriorRing.bbox.ll.x,
+               y: this.exteriorRing.bbox.ll.y
+             },
+             ur: {
+               x: this.exteriorRing.bbox.ur.x,
+               y: this.exteriorRing.bbox.ur.y

              }
              }

+           };
+           this.interiorRings = [];

 
 

-             // Comment take place of default text
-             if (d.newComment) {
-               payload.text = d.newComment;
+           for (var i = 1, iMax = geomPoly.length; i < iMax; i++) {
+             var ring = new RingIn(geomPoly[i], this, false);
+             if (ring.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = ring.bbox.ll.x;
+             if (ring.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = ring.bbox.ll.y;
+             if (ring.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = ring.bbox.ur.x;
+             if (ring.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = ring.bbox.ur.y;
+             this.interiorRings.push(ring);
+           }
+
+           this.multiPoly = multiPoly;
+         }
+
+         _createClass(PolyIn, [{
+           key: "getSweepEvents",
+           value: function getSweepEvents() {
+             var sweepEvents = this.exteriorRing.getSweepEvents();
+
+             for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
+               var ringSweepEvents = this.interiorRings[i].getSweepEvents();
+
+               for (var j = 0, jMax = ringSweepEvents.length; j < jMax; j++) {
+                 sweepEvents.push(ringSweepEvents[j]);
+               }

              }
 
              }
 

-             var controller = new AbortController();
-             _cache$1.inflightPost[d.id] = controller;
+             return sweepEvents;
+           }
+         }]);

 
 

-             var options = {
-               method: 'POST',
-               signal: controller.signal,
-               body: JSON.stringify(payload)
-             };
+         return PolyIn;
+       }();

 
 

-             d3_json(url, options)
-               .then(function () {
-                 delete _cache$1.inflightPost[d.id];
+       var MultiPolyIn = /*#__PURE__*/function () {
+         function MultiPolyIn(geom, isSubject) {
+           _classCallCheck(this, MultiPolyIn);

 
 

-                 // Just a comment, update error in cache
-                 if (!d.newStatus) {
-                   var now = new Date();
-                   var comments = d.comments ? d.comments : [];
+           if (!Array.isArray(geom)) {
+             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+           }

 
 

-                   comments.push({
-                     username: payload.username,
-                     text: payload.text,
-                     timestamp: now.getTime() / 1000
-                   });
+           try {
+             // if the input looks like a polygon, convert it to a multipolygon
+             if (typeof geom[0][0][0] === 'number') geom = [geom];
+           } catch (ex) {// The input is either malformed or has empty arrays.
+             // In either case, it will be handled later on.
+           }

 
 

-                   this$1.replaceItem(d.update({
-                     comments: comments,
-                     newComment: undefined
-                   }));
-                 } else {
-                   this$1.removeItem(d);
-                   if (d.newStatus === 'SOLVED') {
-                     // Keep track of the number of issues closed per type to tag the changeset
-                     if (!(d.issueKey in _cache$1.closed)) {
-                       _cache$1.closed[d.issueKey] = 0;
-                     }
-                     _cache$1.closed[d.issueKey] += 1;
-                   }
-                 }
-                 if (callback) { callback(null, d); }
-               })
-               .catch(function (err) {
-                 delete _cache$1.inflightPost[d.id];
-                 if (callback) { callback(err.message); }
-               });
+           this.polys = [];
+           this.bbox = {
+             ll: {
+               x: Number.POSITIVE_INFINITY,
+               y: Number.POSITIVE_INFINITY
+             },
+             ur: {
+               x: Number.NEGATIVE_INFINITY,
+               y: Number.NEGATIVE_INFINITY
+             }
+           };
+
+           for (var i = 0, iMax = geom.length; i < iMax; i++) {
+             var poly = new PolyIn(geom[i], this);
+             if (poly.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = poly.bbox.ll.x;
+             if (poly.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = poly.bbox.ll.y;
+             if (poly.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = poly.bbox.ur.x;
+             if (poly.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = poly.bbox.ur.y;
+             this.polys.push(poly);

            }
            }

-         },

 
 

+           this.isSubject = isSubject;
+         }

 
 

-         // Get all cached QAItems covering the viewport
-         getItems: function getItems(projection) {
-           var viewport = projection.clipExtent();
-           var min = [viewport[0][0], viewport[1][1]];
-           var max = [viewport[1][0], viewport[0][1]];
-           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+         _createClass(MultiPolyIn, [{
+           key: "getSweepEvents",
+           value: function getSweepEvents() {
+             var sweepEvents = [];

 
 

-           return _cache$1.rtree.search(bbox).map(function (d) { return d.data; });
-         },
+             for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
+               var polySweepEvents = this.polys[i].getSweepEvents();

 
 

-         // Get a QAItem from cache
-         // NOTE: Don't change method name until UI v3 is merged
-         getError: function getError(id) {
-           return _cache$1.data[id];
-         },
+               for (var j = 0, jMax = polySweepEvents.length; j < jMax; j++) {
+                 sweepEvents.push(polySweepEvents[j]);
+               }
+             }

 
 

-         // get the name of the icon to display for this item
-         getIcon: function getIcon(itemType) {
-           return _impOsmData.icons[itemType];
-         },
+             return sweepEvents;
+           }
+         }]);

 
 

-         // Replace a single QAItem in the cache
-         replaceItem: function replaceItem(issue) {
-           if (!(issue instanceof QAItem) || !issue.id) { return; }
+         return MultiPolyIn;
+       }();

 
 

-           _cache$1.data[issue.id] = issue;
-           updateRtree$1(encodeIssueRtree$1(issue), true); // true = replace
-           return issue;
-         },
+       var RingOut = /*#__PURE__*/function () {
+         _createClass(RingOut, null, [{
+           key: "factory",

 
 

-         // Remove a single QAItem from the cache
-         removeItem: function removeItem(issue) {
-           if (!(issue instanceof QAItem) || !issue.id) { return; }
+           /* Given the segments from the sweep line pass, compute & return a series
+            * of closed rings from all the segments marked to be part of the result */
+           value: function factory(allSegments) {
+             var ringsOut = [];

 
 

-           delete _cache$1.data[issue.id];
-           updateRtree$1(encodeIssueRtree$1(issue), false); // false = remove
-         },
+             for (var i = 0, iMax = allSegments.length; i < iMax; i++) {
+               var segment = allSegments[i];
+               if (!segment.isInResult() || segment.ringOut) continue;
+               var prevEvent = null;
+               var event = segment.leftSE;
+               var nextEvent = segment.rightSE;
+               var events = [event];
+               var startingPoint = event.point;
+               var intersectionLEs = [];
+               /* Walk the chain of linked events to form a closed ring */

 
 

-         // Used to populate `closed:improveosm:*` changeset tags
-         getClosedCounts: function getClosedCounts() {
-           return _cache$1.closed;
-         }
-       };
+               while (true) {
+                 prevEvent = event;
+                 event = nextEvent;
+                 events.push(event);
+                 /* Is the ring complete? */

 
 

-       var defaults = createCommonjsModule(function (module) {
-       function getDefaults() {
-         return {
-           baseUrl: null,
-           breaks: false,
-           gfm: true,
-           headerIds: true,
-           headerPrefix: '',
-           highlight: null,
-           langPrefix: 'language-',
-           mangle: true,
-           pedantic: false,
-           renderer: null,
-           sanitize: false,
-           sanitizer: null,
-           silent: false,
-           smartLists: false,
-           smartypants: false,
-           tokenizer: null,
-           xhtml: false
-         };
-       }
+                 if (event.point === startingPoint) break;

 
 

-       function changeDefaults(newDefaults) {
-         module.exports.defaults = newDefaults;
-       }
+                 while (true) {
+                   var availableLEs = event.getAvailableLinkedEvents();
+                   /* Did we hit a dead end? This shouldn't happen. Indicates some earlier
+                    * part of the algorithm malfunctioned... please file a bug report. */

 
 

-       module.exports = {
-         defaults: getDefaults(),
-         getDefaults: getDefaults,
-         changeDefaults: changeDefaults
-       };
-       });
+                   if (availableLEs.length === 0) {
+                     var firstPt = events[0].point;
+                     var lastPt = events[events.length - 1].point;
+                     throw new Error("Unable to complete output ring starting at [".concat(firstPt.x, ",") + " ".concat(firstPt.y, "]. Last matching segment found ends at") + " [".concat(lastPt.x, ", ").concat(lastPt.y, "]."));
+                   }
+                   /* Only one way to go, so cotinue on the path */

 
 

-       /**
-        * Helpers
-        */
-       var escapeTest = /[&<>"']/;
-       var escapeReplace = /[&<>"']/g;
-       var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
-       var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
-       var escapeReplacements = {
-         '&': '&amp;',
-         '<': '&lt;',
-         '>': '&gt;',
-         '"': '&quot;',
-         "'": '&#39;'
-       };
-       var getEscapeReplacement = function (ch) { return escapeReplacements[ch]; };
-       function escape$1(html, encode) {
-         if (encode) {
-           if (escapeTest.test(html)) {
-             return html.replace(escapeReplace, getEscapeReplacement);
-           }
-         } else {
-           if (escapeTestNoEncode.test(html)) {
-             return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
-           }
-         }

 
 

-         return html;
-       }
+                   if (availableLEs.length === 1) {
+                     nextEvent = availableLEs[0].otherSE;
+                     break;
+                   }
+                   /* We must have an intersection. Check for a completed loop */

 
 

-       var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;

 
 

-       function unescape$1(html) {
-         // explicitly match decimal, hex, and named HTML entities
-         return html.replace(unescapeTest, function (_, n) {
-           n = n.toLowerCase();
-           if (n === 'colon') { return ':'; }
-           if (n.charAt(0) === '#') {
-             return n.charAt(1) === 'x'
-               ? String.fromCharCode(parseInt(n.substring(2), 16))
-               : String.fromCharCode(+n.substring(1));
-           }
-           return '';
-         });
-       }
+                   var indexLE = null;

 
 

-       var caret = /(^|[^\[])\^/g;
-       function edit(regex, opt) {
-         regex = regex.source || regex;
-         opt = opt || '';
-         var obj = {
-           replace: function (name, val) {
-             val = val.source || val;
-             val = val.replace(caret, '$1');
-             regex = regex.replace(name, val);
-             return obj;
-           },
-           getRegex: function () {
-             return new RegExp(regex, opt);
-           }
-         };
-         return obj;
-       }
+                   for (var j = 0, jMax = intersectionLEs.length; j < jMax; j++) {
+                     if (intersectionLEs[j].point === event.point) {
+                       indexLE = j;
+                       break;
+                     }
+                   }
+                   /* Found a completed loop. Cut that off and make a ring */
+
+
+                   if (indexLE !== null) {
+                     var intersectionLE = intersectionLEs.splice(indexLE)[0];
+                     var ringEvents = events.splice(intersectionLE.index);
+                     ringEvents.unshift(ringEvents[0].otherSE);
+                     ringsOut.push(new RingOut(ringEvents.reverse()));
+                     continue;
+                   }
+                   /* register the intersection */
+
+
+                   intersectionLEs.push({
+                     index: events.length,
+                     point: event.point
+                   });
+                   /* Choose the left-most option to continue the walk */
+
+                   var comparator = event.getLeftmostComparator(prevEvent);
+                   nextEvent = availableLEs.sort(comparator)[0].otherSE;
+                   break;
+                 }
+               }
+
+               ringsOut.push(new RingOut(events));
+             }

 
 

-       var nonWordAndColonTest = /[^\w:]/g;
-       var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
-       function cleanUrl(sanitize, base, href) {
-         if (sanitize) {
-           var prot;
-           try {
-             prot = decodeURIComponent(unescape$1(href))
-               .replace(nonWordAndColonTest, '')
-               .toLowerCase();
-           } catch (e) {
-             return null;
-           }
-           if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
-             return null;
+             return ringsOut;

            }
            }

-         }
-         if (base && !originIndependentUrl.test(href)) {
-           href = resolveUrl(base, href);
-         }
-         try {
-           href = encodeURI(href).replace(/%25/g, '%');
-         } catch (e$1) {
-           return null;
-         }
-         return href;
-       }
+         }]);

 
 

-       var baseUrls = {};
-       var justDomain = /^[^:]+:\/*[^/]*$/;
-       var protocol = /^([^:]+:)[\s\S]*$/;
-       var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
+         function RingOut(events) {
+           _classCallCheck(this, RingOut);

 
 

-       function resolveUrl(base, href) {
-         if (!baseUrls[' ' + base]) {
-           // we can ignore everything in base after the last slash of its path component,
-           // but we might need to add _that_
-           // https://tools.ietf.org/html/rfc3986#section-3
-           if (justDomain.test(base)) {
-             baseUrls[' ' + base] = base + '/';
-           } else {
-             baseUrls[' ' + base] = rtrim(base, '/', true);
-           }
-         }
-         base = baseUrls[' ' + base];
-         var relativeBase = base.indexOf(':') === -1;
+           this.events = events;

 
 

-         if (href.substring(0, 2) === '//') {
-           if (relativeBase) {
-             return href;
-           }
-           return base.replace(protocol, '$1') + href;
-         } else if (href.charAt(0) === '/') {
-           if (relativeBase) {
-             return href;
+           for (var i = 0, iMax = events.length; i < iMax; i++) {
+             events[i].segment.ringOut = this;

            }
            }

-           return base.replace(domain, '$1') + href;
-         } else {
-           return base + href;
+
+           this.poly = null;

          }
          }

-       }

 
 

-       var noopTest = { exec: function noopTest() {} };
+         _createClass(RingOut, [{
+           key: "getGeom",
+           value: function getGeom() {
+             // Remove superfluous points (ie extra points along a straight line),
+             var prevPt = this.events[0].point;
+             var points = [prevPt];

 
 

-       function merge$1(obj) {
-         var arguments$1 = arguments;
+             for (var i = 1, iMax = this.events.length - 1; i < iMax; i++) {
+               var _pt = this.events[i].point;
+               var _nextPt = this.events[i + 1].point;
+               if (compareVectorAngles(_pt, prevPt, _nextPt) === 0) continue;
+               points.push(_pt);
+               prevPt = _pt;
+             } // ring was all (within rounding error of angle calc) colinear points

 
 

-         var i = 1,
-           target,
-           key;

 
 

-         for (; i < arguments.length; i++) {
-           target = arguments$1[i];
-           for (key in target) {
-             if (Object.prototype.hasOwnProperty.call(target, key)) {
-               obj[key] = target[key];
+             if (points.length === 1) return null; // check if the starting point is necessary
+
+             var pt = points[0];
+             var nextPt = points[1];
+             if (compareVectorAngles(pt, prevPt, nextPt) === 0) points.shift();
+             points.push(points[0]);
+             var step = this.isExteriorRing() ? 1 : -1;
+             var iStart = this.isExteriorRing() ? 0 : points.length - 1;
+             var iEnd = this.isExteriorRing() ? points.length : -1;
+             var orderedPoints = [];
+
+             for (var _i = iStart; _i != iEnd; _i += step) {
+               orderedPoints.push([points[_i].x, points[_i].y]);

              }
              }

+
+             return orderedPoints;

            }
            }

-         }
+         }, {
+           key: "isExteriorRing",
+           value: function isExteriorRing() {
+             if (this._isExteriorRing === undefined) {
+               var enclosing = this.enclosingRing();
+               this._isExteriorRing = enclosing ? !enclosing.isExteriorRing() : true;
+             }

 
 

-         return obj;
-       }
+             return this._isExteriorRing;
+           }
+         }, {
+           key: "enclosingRing",
+           value: function enclosingRing() {
+             if (this._enclosingRing === undefined) {
+               this._enclosingRing = this._calcEnclosingRing();
+             }

 
 

-       function splitCells(tableRow, count) {
-         // ensure that every cell-delimiting pipe has a space
-         // before it to distinguish it from an escaped pipe
-         var row = tableRow.replace(/\|/g, function (match, offset, str) {
-             var escaped = false,
-               curr = offset;
-             while (--curr >= 0 && str[curr] === '\\') { escaped = !escaped; }
-             if (escaped) {
-               // odd number of slashes means | is escaped
-               // so we leave it alone
-               return '|';
-             } else {
-               // add space before unescaped |
-               return ' |';
+             return this._enclosingRing;
+           }
+           /* Returns the ring that encloses this one, if any */
+
+         }, {
+           key: "_calcEnclosingRing",
+           value: function _calcEnclosingRing() {
+             // start with the ealier sweep line event so that the prevSeg
+             // chain doesn't lead us inside of a loop of ours
+             var leftMostEvt = this.events[0];
+
+             for (var i = 1, iMax = this.events.length; i < iMax; i++) {
+               var evt = this.events[i];
+               if (SweepEvent.compare(leftMostEvt, evt) > 0) leftMostEvt = evt;

              }
              }

-           }),
-           cells = row.split(/ \|/);
-         var i = 0;

 
 

-         if (cells.length > count) {
-           cells.splice(count);
-         } else {
-           while (cells.length < count) { cells.push(''); }
-         }
+             var prevSeg = leftMostEvt.segment.prevInResult();
+             var prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;

 
 

-         for (; i < cells.length; i++) {
-           // leading or trailing whitespace is ignored per the gfm spec
-           cells[i] = cells[i].trim().replace(/\\\|/g, '|');
-         }
-         return cells;
-       }
+             while (true) {
+               // no segment found, thus no ring can enclose us
+               if (!prevSeg) return null; // no segments below prev segment found, thus the ring of the prev
+               // segment must loop back around and enclose us

 
 

-       // Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
-       // /c*$/ is vulnerable to REDOS.
-       // invert: Remove suffix of non-c chars instead. Default falsey.
-       function rtrim(str, c, invert) {
-         var l = str.length;
-         if (l === 0) {
-           return '';
-         }
+               if (!prevPrevSeg) return prevSeg.ringOut; // if the two segments are of different rings, the ring of the prev
+               // segment must either loop around us or the ring of the prev prev
+               // seg, which would make us and the ring of the prev peers

 
 

-         // Length of suffix matching the invert condition.
-         var suffLen = 0;
+               if (prevPrevSeg.ringOut !== prevSeg.ringOut) {
+                 if (prevPrevSeg.ringOut.enclosingRing() !== prevSeg.ringOut) {
+                   return prevSeg.ringOut;
+                 } else return prevSeg.ringOut.enclosingRing();
+               } // two segments are from the same ring, so this was a penisula
+               // of that ring. iterate downward, keep searching

 
 

-         // Step left until we fail to match the invert condition.
-         while (suffLen < l) {
-           var currChar = str.charAt(l - suffLen - 1);
-           if (currChar === c && !invert) {
-             suffLen++;
-           } else if (currChar !== c && invert) {
-             suffLen++;
-           } else {
-             break;
+
+               prevSeg = prevPrevSeg.prevInResult();
+               prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+             }

            }
            }

-         }
+         }]);

 
 

-         return str.substr(0, l - suffLen);
-       }
+         return RingOut;
+       }();

 
 

-       function findClosingBracket(str, b) {
-         if (str.indexOf(b[1]) === -1) {
-           return -1;
+       var PolyOut = /*#__PURE__*/function () {
+         function PolyOut(exteriorRing) {
+           _classCallCheck(this, PolyOut);
+
+           this.exteriorRing = exteriorRing;
+           exteriorRing.poly = this;
+           this.interiorRings = [];

          }
          }

-         var l = str.length;
-         var level = 0,
-           i = 0;
-         for (; i < l; i++) {
-           if (str[i] === '\\') {
-             i++;
-           } else if (str[i] === b[0]) {
-             level++;
-           } else if (str[i] === b[1]) {
-             level--;
-             if (level < 0) {
-               return i;
+
+         _createClass(PolyOut, [{
+           key: "addInterior",
+           value: function addInterior(ring) {
+             this.interiorRings.push(ring);
+             ring.poly = this;
+           }
+         }, {
+           key: "getGeom",
+           value: function getGeom() {
+             var geom = [this.exteriorRing.getGeom()]; // exterior ring was all (within rounding error of angle calc) colinear points
+
+             if (geom[0] === null) return null;
+
+             for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
+               var ringGeom = this.interiorRings[i].getGeom(); // interior ring was all (within rounding error of angle calc) colinear points
+
+               if (ringGeom === null) continue;
+               geom.push(ringGeom);

              }
              }

+
+             return geom;

            }
            }

-         }
-         return -1;
-       }
+         }]);

 
 

-       function checkSanitizeDeprecation(opt) {
-         if (opt && opt.sanitize && !opt.silent) {
-           console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
+         return PolyOut;
+       }();
+
+       var MultiPolyOut = /*#__PURE__*/function () {
+         function MultiPolyOut(rings) {
+           _classCallCheck(this, MultiPolyOut);
+
+           this.rings = rings;
+           this.polys = this._composePolys(rings);

          }
          }

-       }

 
 

-       var helpers = {
-         escape: escape$1,
-         unescape: unescape$1,
-         edit: edit,
-         cleanUrl: cleanUrl,
-         resolveUrl: resolveUrl,
-         noopTest: noopTest,
-         merge: merge$1,
-         splitCells: splitCells,
-         rtrim: rtrim,
-         findClosingBracket: findClosingBracket,
-         checkSanitizeDeprecation: checkSanitizeDeprecation
-       };
+         _createClass(MultiPolyOut, [{
+           key: "getGeom",
+           value: function getGeom() {
+             var geom = [];

 
 

-       var defaults$1 = defaults.defaults;
-       var rtrim$1 = helpers.rtrim;
-       var splitCells$1 = helpers.splitCells;
-       var escape$2 = helpers.escape;
-       var findClosingBracket$1 = helpers.findClosingBracket;
+             for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
+               var polyGeom = this.polys[i].getGeom(); // exterior ring was all (within rounding error of angle calc) colinear points

 
 

-       function outputLink(cap, link, raw) {
-         var href = link.href;
-         var title = link.title ? escape$2(link.title) : null;
+               if (polyGeom === null) continue;
+               geom.push(polyGeom);
+             }

 
 

-         if (cap[0].charAt(0) !== '!') {
-           return {
-             type: 'link',
-             raw: raw,
-             href: href,
-             title: title,
-             text: cap[1]
-           };
-         } else {
-           return {
-             type: 'image',
-             raw: raw,
-             text: escape$2(cap[1]),
-             href: href,
-             title: title
-           };
-         }
-       }
+             return geom;
+           }
+         }, {
+           key: "_composePolys",
+           value: function _composePolys(rings) {
+             var polys = [];
+
+             for (var i = 0, iMax = rings.length; i < iMax; i++) {
+               var ring = rings[i];
+               if (ring.poly) continue;
+               if (ring.isExteriorRing()) polys.push(new PolyOut(ring));else {
+                 var enclosingRing = ring.enclosingRing();
+                 if (!enclosingRing.poly) polys.push(new PolyOut(enclosingRing));
+                 enclosingRing.poly.addInterior(ring);
+               }
+             }
+
+             return polys;
+           }
+         }]);

 
 

+         return MultiPolyOut;
+       }();

        /**
        /**

-        * Tokenizer
+        * NOTE:  We must be careful not to change any segments while
+        *        they are in the SplayTree. AFAIK, there's no way to tell
+        *        the tree to rebalance itself - thus before splitting
+        *        a segment that's in the tree, we remove it from the tree,
+        *        do the split, then re-insert it. (Even though splitting a
+        *        segment *shouldn't* change its correct position in the
+        *        sweep line tree, the reality is because of rounding errors,
+        *        it sometimes does.)

         */
         */

-       var Tokenizer_1 = /*@__PURE__*/(function () {
-         function Tokenizer(options) {
-           this.options = options || defaults$1;
+
+
+       var SweepLine = /*#__PURE__*/function () {
+         function SweepLine(queue) {
+           var comparator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Segment.compare;
+
+           _classCallCheck(this, SweepLine);
+
+           this.queue = queue;
+           this.tree = new Tree(comparator);
+           this.segments = [];

          }
 
          }
 

-         Tokenizer.prototype.space = function space (src) {
-           var cap = this.rules.block.newline.exec(src);
-           if (cap) {
-             if (cap[0].length > 1) {
-               return {
-                 type: 'space',
-                 raw: cap[0]
-               };
+         _createClass(SweepLine, [{
+           key: "process",
+           value: function process(event) {
+             var segment = event.segment;
+             var newEvents = []; // if we've already been consumed by another segment,
+             // clean up our body parts and get out
+
+             if (event.consumedBy) {
+               if (event.isLeft) this.queue.remove(event.otherSE);else this.tree.remove(segment);
+               return newEvents;

              }
              }

-             return { raw: '\n' };
-           }
-         };

 
 

-         Tokenizer.prototype.code = function code (src, tokens) {
-           var cap = this.rules.block.code.exec(src);
-           if (cap) {
-             var lastToken = tokens[tokens.length - 1];
-             // An indented code block cannot interrupt a paragraph.
-             if (lastToken && lastToken.type === 'paragraph') {
-               tokens.pop();
-               lastToken.text += '\n' + cap[0].trimRight();
-               lastToken.raw += '\n' + cap[0];
-               return lastToken;
-             } else {
-               var text = cap[0].replace(/^ {4}/gm, '');
-               return {
-                 type: 'code',
-                 raw: cap[0],
-                 codeBlockStyle: 'indented',
-                 text: !this.options.pedantic
-                   ? rtrim$1(text, '\n')
-                   : text
-               };
+             var node = event.isLeft ? this.tree.insert(segment) : this.tree.find(segment);
+             if (!node) throw new Error("Unable to find segment #".concat(segment.id, " ") + "[".concat(segment.leftSE.point.x, ", ").concat(segment.leftSE.point.y, "] -> ") + "[".concat(segment.rightSE.point.x, ", ").concat(segment.rightSE.point.y, "] ") + 'in SweepLine tree. Please submit a bug report.');
+             var prevNode = node;
+             var nextNode = node;
+             var prevSeg = undefined;
+             var nextSeg = undefined; // skip consumed segments still in tree
+
+             while (prevSeg === undefined) {
+               prevNode = this.tree.prev(prevNode);
+               if (prevNode === null) prevSeg = null;else if (prevNode.key.consumedBy === undefined) prevSeg = prevNode.key;
+             } // skip consumed segments still in tree
+
+
+             while (nextSeg === undefined) {
+               nextNode = this.tree.next(nextNode);
+               if (nextNode === null) nextSeg = null;else if (nextNode.key.consumedBy === undefined) nextSeg = nextNode.key;

              }
              }

-           }
-         };

 
 

-         Tokenizer.prototype.fences = function fences (src) {
-           var cap = this.rules.block.fences.exec(src);
-           if (cap) {
-             return {
-               type: 'code',
-               raw: cap[0],
-               lang: cap[2] ? cap[2].trim() : cap[2],
-               text: cap[3] || ''
-             };
-           }
-         };
+             if (event.isLeft) {
+               // Check for intersections against the previous segment in the sweep line
+               var prevMySplitter = null;

 
 

-         Tokenizer.prototype.heading = function heading (src) {
-           var cap = this.rules.block.heading.exec(src);
-           if (cap) {
-             return {
-               type: 'heading',
-               raw: cap[0],
-               depth: cap[1].length,
-               text: cap[2]
-             };
-           }
-         };
+               if (prevSeg) {
+                 var prevInter = prevSeg.getIntersection(segment);

 
 

-         Tokenizer.prototype.nptable = function nptable (src) {
-           var cap = this.rules.block.nptable.exec(src);
-           if (cap) {
-             var item = {
-               type: 'table',
-               header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
-               align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
-               cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : [],
-               raw: cap[0]
-             };
+                 if (prevInter !== null) {
+                   if (!segment.isAnEndpoint(prevInter)) prevMySplitter = prevInter;

 
 

-             if (item.header.length === item.align.length) {
-               var l = item.align.length;
-               var i;
-               for (i = 0; i < l; i++) {
-                 if (/^ *-+: *$/.test(item.align[i])) {
-                   item.align[i] = 'right';
-                 } else if (/^ *:-+: *$/.test(item.align[i])) {
-                   item.align[i] = 'center';
-                 } else if (/^ *:-+ *$/.test(item.align[i])) {
-                   item.align[i] = 'left';
-                 } else {
-                   item.align[i] = null;
+                   if (!prevSeg.isAnEndpoint(prevInter)) {
+                     var newEventsFromSplit = this._splitSafely(prevSeg, prevInter);
+
+                     for (var i = 0, iMax = newEventsFromSplit.length; i < iMax; i++) {
+                       newEvents.push(newEventsFromSplit[i]);
+                     }
+                   }

                  }
                  }

-               }
+               } // Check for intersections against the next segment in the sweep line

 
 

-               l = item.cells.length;
-               for (i = 0; i < l; i++) {
-                 item.cells[i] = splitCells$1(item.cells[i], item.header.length);
-               }

 
 

-               return item;
-             }
-           }
-         };
+               var nextMySplitter = null;

 
 

-         Tokenizer.prototype.hr = function hr (src) {
-           var cap = this.rules.block.hr.exec(src);
-           if (cap) {
-             return {
-               type: 'hr',
-               raw: cap[0]
-             };
-           }
-         };
+               if (nextSeg) {
+                 var nextInter = nextSeg.getIntersection(segment);

 
 

-         Tokenizer.prototype.blockquote = function blockquote (src) {
-           var cap = this.rules.block.blockquote.exec(src);
-           if (cap) {
-             var text = cap[0].replace(/^ *> ?/gm, '');
+                 if (nextInter !== null) {
+                   if (!segment.isAnEndpoint(nextInter)) nextMySplitter = nextInter;

 
 

-             return {
-               type: 'blockquote',
-               raw: cap[0],
-               text: text
-             };
-           }
-         };
+                   if (!nextSeg.isAnEndpoint(nextInter)) {
+                     var _newEventsFromSplit = this._splitSafely(nextSeg, nextInter);
+
+                     for (var _i = 0, _iMax = _newEventsFromSplit.length; _i < _iMax; _i++) {
+                       newEvents.push(_newEventsFromSplit[_i]);
+                     }
+                   }
+                 }
+               } // For simplicity, even if we find more than one intersection we only
+               // spilt on the 'earliest' (sweep-line style) of the intersections.
+               // The other intersection will be handled in a future process().

 
 

-         Tokenizer.prototype.list = function list (src) {
-           var cap = this.rules.block.list.exec(src);
-           if (cap) {
-             var raw = cap[0];
-             var bull = cap[2];
-             var isordered = bull.length > 1;

 
 

-             var list = {
-               type: 'list',
-               raw: raw,
-               ordered: isordered,
-               start: isordered ? +bull : '',
-               loose: false,
-               items: []
-             };
+               if (prevMySplitter !== null || nextMySplitter !== null) {
+                 var mySplitter = null;
+                 if (prevMySplitter === null) mySplitter = nextMySplitter;else if (nextMySplitter === null) mySplitter = prevMySplitter;else {
+                   var cmpSplitters = SweepEvent.comparePoints(prevMySplitter, nextMySplitter);
+                   mySplitter = cmpSplitters <= 0 ? prevMySplitter : nextMySplitter;
+                 } // Rounding errors can cause changes in ordering,
+                 // so remove afected segments and right sweep events before splitting
+
+                 this.queue.remove(segment.rightSE);
+                 newEvents.push(segment.rightSE);

 
 

-             // Get each top-level item.
-             var itemMatch = cap[0].match(this.rules.block.item);
-
-             var next = false,
-               item,
-               space,
-               b,
-               addBack,
-               loose,
-               istask,
-               ischecked;
-
-             var l = itemMatch.length;
-             for (var i = 0; i < l; i++) {
-               item = itemMatch[i];
-               raw = item;
-
-               // Remove the list item's bullet
-               // so it is seen as the next token.
-               space = item.length;
-               item = item.replace(/^ *([*+-]|\d+\.) */, '');
-
-               // Outdent whatever the
-               // list item contains. Hacky.
-               if (~item.indexOf('\n ')) {
-                 space -= item.length;
-                 item = !this.options.pedantic
-                   ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '')
-                   : item.replace(/^ {1,4}/gm, '');
-               }
-
-               // Determine whether the next list item belongs here.
-               // Backpedal if it does not belong in this list.
-               if (i !== l - 1) {
-                 b = this.rules.block.bullet.exec(itemMatch[i + 1])[0];
-                 if (bull.length > 1 ? b.length === 1
-                   : (b.length > 1 || (this.options.smartLists && b !== bull))) {
-                   addBack = itemMatch.slice(i + 1).join('\n');
-                   list.raw = list.raw.substring(0, list.raw.length - addBack.length);
-                   i = l - 1;
+                 var _newEventsFromSplit2 = segment.split(mySplitter);
+
+                 for (var _i2 = 0, _iMax2 = _newEventsFromSplit2.length; _i2 < _iMax2; _i2++) {
+                   newEvents.push(_newEventsFromSplit2[_i2]);

                  }
                }
 
                  }
                }
 

-               // Determine whether item is loose or not.
-               // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
-               // for discount behavior.
-               loose = next || /\n\n(?!\s*$)/.test(item);
-               if (i !== l - 1) {
-                 next = item.charAt(item.length - 1) === '\n';
-                 if (!loose) { loose = next; }
+               if (newEvents.length > 0) {
+                 // We found some intersections, so re-do the current event to
+                 // make sure sweep line ordering is totally consistent for later
+                 // use with the segment 'prev' pointers
+                 this.tree.remove(segment);
+                 newEvents.push(event);
+               } else {
+                 // done with left event
+                 this.segments.push(segment);
+                 segment.prev = prevSeg;

                }
                }

+             } else {
+               // event.isRight
+               // since we're about to be removed from the sweep line, check for
+               // intersections between our previous and next segments
+               if (prevSeg && nextSeg) {
+                 var inter = prevSeg.getIntersection(nextSeg);
+
+                 if (inter !== null) {
+                   if (!prevSeg.isAnEndpoint(inter)) {
+                     var _newEventsFromSplit3 = this._splitSafely(prevSeg, inter);
+
+                     for (var _i3 = 0, _iMax3 = _newEventsFromSplit3.length; _i3 < _iMax3; _i3++) {
+                       newEvents.push(_newEventsFromSplit3[_i3]);
+                     }
+                   }

 
 

-               if (loose) {
-                 list.loose = true;
-               }
+                   if (!nextSeg.isAnEndpoint(inter)) {
+                     var _newEventsFromSplit4 = this._splitSafely(nextSeg, inter);

 
 

-               // Check for task list items
-               istask = /^\[[ xX]\] /.test(item);
-               ischecked = undefined;
-               if (istask) {
-                 ischecked = item[1] !== ' ';
-                 item = item.replace(/^\[[ xX]\] +/, '');
+                     for (var _i4 = 0, _iMax4 = _newEventsFromSplit4.length; _i4 < _iMax4; _i4++) {
+                       newEvents.push(_newEventsFromSplit4[_i4]);
+                     }
+                   }
+                 }

                }
 
                }
 

-               list.items.push({
-                 raw: raw,
-                 task: istask,
-                 checked: ischecked,
-                 loose: loose,
-                 text: item
-               });
+               this.tree.remove(segment);

              }
 
              }
 

-             return list;
+             return newEvents;

            }
            }

-         };
+           /* Safely split a segment that is currently in the datastructures
+            * IE - a segment other than the one that is currently being processed. */

 
 

-         Tokenizer.prototype.html = function html (src) {
-           var cap = this.rules.block.html.exec(src);
-           if (cap) {
-             return {
-               type: this.options.sanitize
-                 ? 'paragraph'
-                 : 'html',
-               raw: cap[0],
-               pre: !this.options.sanitizer
-                 && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
-               text: this.options.sanitize ? (this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape$2(cap[0])) : cap[0]
-             };
-           }
-         };
+         }, {
+           key: "_splitSafely",
+           value: function _splitSafely(seg, pt) {
+             // Rounding errors can cause changes in ordering,
+             // so remove afected segments and right sweep events before splitting
+             // removeNode() doesn't work, so have re-find the seg
+             // https://github.com/w8r/splay-tree/pull/5
+             this.tree.remove(seg);
+             var rightSE = seg.rightSE;
+             this.queue.remove(rightSE);
+             var newEvents = seg.split(pt);
+             newEvents.push(rightSE); // splitting can trigger consumption

 
 

-         Tokenizer.prototype.def = function def (src) {
-           var cap = this.rules.block.def.exec(src);
-           if (cap) {
-             if (cap[3]) { cap[3] = cap[3].substring(1, cap[3].length - 1); }
-             var tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
-             return {
-               tag: tag,
-               raw: cap[0],
-               href: cap[2],
-               title: cap[3]
-             };
+             if (seg.consumedBy === undefined) this.tree.insert(seg);
+             return newEvents;

            }
            }

-         };
+         }]);

 
 

-         Tokenizer.prototype.table = function table (src) {
-           var cap = this.rules.block.table.exec(src);
-           if (cap) {
-             var item = {
-               type: 'table',
-               header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
-               align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
-               cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
-             };
+         return SweepLine;
+       }();

 
 

-             if (item.header.length === item.align.length) {
-               item.raw = cap[0];
+       var POLYGON_CLIPPING_MAX_QUEUE_SIZE = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_QUEUE_SIZE || 1000000;
+       var POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS || 1000000;

 
 

-               var l = item.align.length;
-               var i;
-               for (i = 0; i < l; i++) {
-                 if (/^ *-+: *$/.test(item.align[i])) {
-                   item.align[i] = 'right';
-                 } else if (/^ *:-+: *$/.test(item.align[i])) {
-                   item.align[i] = 'center';
-                 } else if (/^ *:-+ *$/.test(item.align[i])) {
-                   item.align[i] = 'left';
-                 } else {
-                   item.align[i] = null;
-                 }
-               }
+       var Operation = /*#__PURE__*/function () {
+         function Operation() {
+           _classCallCheck(this, Operation);
+         }

 
 

-               l = item.cells.length;
-               for (i = 0; i < l; i++) {
-                 item.cells[i] = splitCells$1(
-                   item.cells[i].replace(/^ *\| *| *\| *$/g, ''),
-                   item.header.length);
-               }
+         _createClass(Operation, [{
+           key: "run",
+           value: function run(type, geom, moreGeoms) {
+             operation.type = type;
+             rounder.reset();
+             /* Convert inputs to MultiPoly objects */
+
+             var multipolys = [new MultiPolyIn(geom, true)];

 
 

-               return item;
+             for (var i = 0, iMax = moreGeoms.length; i < iMax; i++) {
+               multipolys.push(new MultiPolyIn(moreGeoms[i], false));

              }
              }

-           }
-         };

 
 

-         Tokenizer.prototype.lheading = function lheading (src) {
-           var cap = this.rules.block.lheading.exec(src);
-           if (cap) {
-             return {
-               type: 'heading',
-               raw: cap[0],
-               depth: cap[2].charAt(0) === '=' ? 1 : 2,
-               text: cap[1]
-             };
-           }
-         };
+             operation.numMultiPolys = multipolys.length;
+             /* BBox optimization for difference operation
+              * If the bbox of a multipolygon that's part of the clipping doesn't
+              * intersect the bbox of the subject at all, we can just drop that
+              * multiploygon. */

 
 

-         Tokenizer.prototype.paragraph = function paragraph (src) {
-           var cap = this.rules.block.paragraph.exec(src);
-           if (cap) {
-             return {
-               type: 'paragraph',
-               raw: cap[0],
-               text: cap[1].charAt(cap[1].length - 1) === '\n'
-                 ? cap[1].slice(0, -1)
-                 : cap[1]
-             };
-           }
-         };
+             if (operation.type === 'difference') {
+               // in place removal
+               var subject = multipolys[0];
+               var _i = 1;

 
 

-         Tokenizer.prototype.text = function text (src) {
-           var cap = this.rules.block.text.exec(src);
-           if (cap) {
-             return {
-               type: 'text',
-               raw: cap[0],
-               text: cap[0]
-             };
-           }
-         };
+               while (_i < multipolys.length) {
+                 if (getBboxOverlap(multipolys[_i].bbox, subject.bbox) !== null) _i++;else multipolys.splice(_i, 1);
+               }
+             }
+             /* BBox optimization for intersection operation
+              * If we can find any pair of multipolygons whose bbox does not overlap,
+              * then the result will be empty. */

 
 

-         Tokenizer.prototype.escape = function escape$1 (src) {
-           var cap = this.rules.inline.escape.exec(src);
-           if (cap) {
-             return {
-               type: 'escape',
-               raw: cap[0],
-               text: escape$2(cap[1])
-             };
-           }
-         };

 
 

-         Tokenizer.prototype.tag = function tag (src, inLink, inRawBlock) {
-           var cap = this.rules.inline.tag.exec(src);
-           if (cap) {
-             if (!inLink && /^<a /i.test(cap[0])) {
-               inLink = true;
-             } else if (inLink && /^<\/a>/i.test(cap[0])) {
-               inLink = false;
+             if (operation.type === 'intersection') {
+               // TODO: this is O(n^2) in number of polygons. By sorting the bboxes,
+               //       it could be optimized to O(n * ln(n))
+               for (var _i2 = 0, _iMax = multipolys.length; _i2 < _iMax; _i2++) {
+                 var mpA = multipolys[_i2];
+
+                 for (var j = _i2 + 1, jMax = multipolys.length; j < jMax; j++) {
+                   if (getBboxOverlap(mpA.bbox, multipolys[j].bbox) === null) return [];
+                 }
+               }

              }
              }

-             if (!inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
-               inRawBlock = true;
-             } else if (inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
-               inRawBlock = false;
+             /* Put segment endpoints in a priority queue */
+
+
+             var queue = new Tree(SweepEvent.compare);
+
+             for (var _i3 = 0, _iMax2 = multipolys.length; _i3 < _iMax2; _i3++) {
+               var sweepEvents = multipolys[_i3].getSweepEvents();
+
+               for (var _j = 0, _jMax = sweepEvents.length; _j < _jMax; _j++) {
+                 queue.insert(sweepEvents[_j]);
+
+                 if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
+                   // prevents an infinite loop, an otherwise common manifestation of bugs
+                   throw new Error('Infinite loop when putting segment endpoints in a priority queue ' + '(queue size too big). Please file a bug report.');
+                 }
+               }

              }
              }

+             /* Pass the sweep line over those endpoints */

 
 

-             return {
-               type: this.options.sanitize
-                 ? 'text'
-                 : 'html',
-               raw: cap[0],
-               inLink: inLink,
-               inRawBlock: inRawBlock,
-               text: this.options.sanitize
-                 ? (this.options.sanitizer
-                   ? this.options.sanitizer(cap[0])
-                   : escape$2(cap[0]))
-                 : cap[0]
-             };
+
+             var sweepLine = new SweepLine(queue);
+             var prevQueueSize = queue.size;
+             var node = queue.pop();
+
+             while (node) {
+               var evt = node.key;
+
+               if (queue.size === prevQueueSize) {
+                 // prevents an infinite loop, an otherwise common manifestation of bugs
+                 var seg = evt.segment;
+                 throw new Error("Unable to pop() ".concat(evt.isLeft ? 'left' : 'right', " SweepEvent ") + "[".concat(evt.point.x, ", ").concat(evt.point.y, "] from segment #").concat(seg.id, " ") + "[".concat(seg.leftSE.point.x, ", ").concat(seg.leftSE.point.y, "] -> ") + "[".concat(seg.rightSE.point.x, ", ").concat(seg.rightSE.point.y, "] from queue. ") + 'Please file a bug report.');
+               }
+
+               if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
+                 // prevents an infinite loop, an otherwise common manifestation of bugs
+                 throw new Error('Infinite loop when passing sweep line over endpoints ' + '(queue size too big). Please file a bug report.');
+               }
+
+               if (sweepLine.segments.length > POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS) {
+                 // prevents an infinite loop, an otherwise common manifestation of bugs
+                 throw new Error('Infinite loop when passing sweep line over endpoints ' + '(too many sweep line segments). Please file a bug report.');
+               }
+
+               var newEvents = sweepLine.process(evt);
+
+               for (var _i4 = 0, _iMax3 = newEvents.length; _i4 < _iMax3; _i4++) {
+                 var _evt = newEvents[_i4];
+                 if (_evt.consumedBy === undefined) queue.insert(_evt);
+               }
+
+               prevQueueSize = queue.size;
+               node = queue.pop();
+             } // free some memory we don't need anymore
+
+
+             rounder.reset();
+             /* Collect and compile segments we're keeping into a multipolygon */
+
+             var ringsOut = RingOut.factory(sweepLine.segments);
+             var result = new MultiPolyOut(ringsOut);
+             return result.getGeom();

            }
            }

-         };
+         }]);

 
 

-         Tokenizer.prototype.link = function link (src) {
-           var cap = this.rules.inline.link.exec(src);
-           if (cap) {
-             var lastParenIndex = findClosingBracket$1(cap[2], '()');
-             if (lastParenIndex > -1) {
-               var start = cap[0].indexOf('!') === 0 ? 5 : 4;
-               var linkLen = start + cap[1].length + lastParenIndex;
-               cap[2] = cap[2].substring(0, lastParenIndex);
-               cap[0] = cap[0].substring(0, linkLen).trim();
-               cap[3] = '';
-             }
-             var href = cap[2];
-             var title = '';
-             if (this.options.pedantic) {
-               var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
+         return Operation;
+       }(); // singleton available by import
+
+
+       var operation = new Operation();
+
+       var union = function union(geom) {
+         for (var _len = arguments.length, moreGeoms = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+           moreGeoms[_key - 1] = arguments[_key];
+         }
+
+         return operation.run('union', geom, moreGeoms);
+       };
+
+       var intersection$1 = function intersection(geom) {
+         for (var _len2 = arguments.length, moreGeoms = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
+           moreGeoms[_key2 - 1] = arguments[_key2];
+         }
+
+         return operation.run('intersection', geom, moreGeoms);
+       };

 
 

-               if (link) {
-                 href = link[1];
-                 title = link[3];
+       var xor = function xor(geom) {
+         for (var _len3 = arguments.length, moreGeoms = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
+           moreGeoms[_key3 - 1] = arguments[_key3];
+         }
+
+         return operation.run('xor', geom, moreGeoms);
+       };
+
+       var difference = function difference(subjectGeom) {
+         for (var _len4 = arguments.length, clippingGeoms = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
+           clippingGeoms[_key4 - 1] = arguments[_key4];
+         }
+
+         return operation.run('difference', subjectGeom, clippingGeoms);
+       };
+
+       var index = {
+         union: union,
+         intersection: intersection$1,
+         xor: xor,
+         difference: difference
+       };
+
+       var geojsonPrecision = {exports: {}};
+
+       (function () {
+         function parse(t, coordinatePrecision, extrasPrecision) {
+           function point(p) {
+             return p.map(function (e, index) {
+               if (index < 2) {
+                 return 1 * e.toFixed(coordinatePrecision);

                } else {
                } else {

-                 title = '';
+                 return 1 * e.toFixed(extrasPrecision);

                }
                }

-             } else {
-               title = cap[3] ? cap[3].slice(1, -1) : '';
-             }
-             href = href.trim().replace(/^<([\s\S]*)>$/, '$1');
-             var token = outputLink(cap, {
-               href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
-               title: title ? title.replace(this.rules.inline._escapes, '$1') : title
-             }, cap[0]);
-             return token;
+             });

            }
            }

-         };

 
 

-         Tokenizer.prototype.reflink = function reflink (src, links) {
-           var cap;
-           if ((cap = this.rules.inline.reflink.exec(src))
-               || (cap = this.rules.inline.nolink.exec(src))) {
-             var link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
-             link = links[link.toLowerCase()];
-             if (!link || !link.href) {
-               var text = cap[0].charAt(0);
-               return {
-                 type: 'text',
-                 raw: text,
-                 text: text
-               };
-             }
-             var token = outputLink(cap, link, cap[0]);
-             return token;
+           function multi(l) {
+             return l.map(point);

            }
            }

-         };

 
 

-         Tokenizer.prototype.strong = function strong (src) {
-           var cap = this.rules.inline.strong.exec(src);
-           if (cap) {
-             return {
-               type: 'strong',
-               raw: cap[0],
-               text: cap[4] || cap[3] || cap[2] || cap[1]
-             };
+           function poly(p) {
+             return p.map(multi);

            }
            }

-         };

 
 

-         Tokenizer.prototype.em = function em (src) {
-           var cap = this.rules.inline.em.exec(src);
-           if (cap) {
-             return {
-               type: 'em',
-               raw: cap[0],
-               text: cap[6] || cap[5] || cap[4] || cap[3] || cap[2] || cap[1]
-             };
+           function multiPoly(m) {
+             return m.map(poly);

            }
            }

-         };

 
 

-         Tokenizer.prototype.codespan = function codespan (src) {
-           var cap = this.rules.inline.code.exec(src);
-           if (cap) {
-             return {
-               type: 'codespan',
-               raw: cap[0],
-               text: escape$2(cap[2].trim(), true)
-             };
-           }
-         };
+           function geometry(obj) {
+             if (!obj) {
+               return {};
+             }

 
 

-         Tokenizer.prototype.br = function br (src) {
-           var cap = this.rules.inline.br.exec(src);
-           if (cap) {
-             return {
-               type: 'br',
-               raw: cap[0]
-             };
-           }
-         };
+             switch (obj.type) {
+               case "Point":
+                 obj.coordinates = point(obj.coordinates);
+                 return obj;

 
 

-         Tokenizer.prototype.del = function del (src) {
-           var cap = this.rules.inline.del.exec(src);
-           if (cap) {
-             return {
-               type: 'del',
-               raw: cap[0],
-               text: cap[1]
-             };
-           }
-         };
+               case "LineString":
+               case "MultiPoint":
+                 obj.coordinates = multi(obj.coordinates);
+                 return obj;

 
 

-         Tokenizer.prototype.autolink = function autolink (src, mangle) {
-           var cap = this.rules.inline.autolink.exec(src);
-           if (cap) {
-             var text, href;
-             if (cap[2] === '@') {
-               text = escape$2(this.options.mangle ? mangle(cap[1]) : cap[1]);
-               href = 'mailto:' + text;
-             } else {
-               text = escape$2(cap[1]);
-               href = text;
+               case "Polygon":
+               case "MultiLineString":
+                 obj.coordinates = poly(obj.coordinates);
+                 return obj;
+
+               case "MultiPolygon":
+                 obj.coordinates = multiPoly(obj.coordinates);
+                 return obj;
+
+               case "GeometryCollection":
+                 obj.geometries = obj.geometries.map(geometry);
+                 return obj;
+
+               default:
+                 return {};

              }
              }

+           }

 
 

-             return {
-               type: 'link',
-               raw: cap[0],
-               text: text,
-               href: href,
-               tokens: [
-                 {
-                   type: 'text',
-                   raw: text,
-                   text: text
-                 }
-               ]
-             };
+           function feature(obj) {
+             obj.geometry = geometry(obj.geometry);
+             return obj;

            }
            }

-         };

 
 

-         Tokenizer.prototype.url = function url (src, mangle) {
-           var cap;
-           if (cap = this.rules.inline.url.exec(src)) {
-             var text, href;
-             if (cap[2] === '@') {
-               text = escape$2(this.options.mangle ? mangle(cap[0]) : cap[0]);
-               href = 'mailto:' + text;
-             } else {
-               // do extended autolink path validation
-               var prevCapZero;
-               do {
-                 prevCapZero = cap[0];
-                 cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
-               } while (prevCapZero !== cap[0]);
-               text = escape$2(cap[0]);
-               if (cap[1] === 'www.') {
-                 href = 'http://' + text;
-               } else {
-                 href = text;
-               }
-             }
-             return {
-               type: 'link',
-               raw: cap[0],
-               text: text,
-               href: href,
-               tokens: [
-                 {
-                   type: 'text',
-                   raw: text,
-                   text: text
-                 }
-               ]
-             };
+           function featureCollection(f) {
+             f.features = f.features.map(feature);
+             return f;

            }
            }

-         };

 
 

-         Tokenizer.prototype.inlineText = function inlineText (src, inRawBlock, smartypants) {
-           var cap = this.rules.inline.text.exec(src);
-           if (cap) {
-             var text;
-             if (inRawBlock) {
-               text = this.options.sanitize ? (this.options.sanitizer ? this.options.sanitizer(cap[0]) : escape$2(cap[0])) : cap[0];
-             } else {
-               text = escape$2(this.options.smartypants ? smartypants(cap[0]) : cap[0]);
-             }
-             return {
-               type: 'text',
-               raw: cap[0],
-               text: text
-             };
+           function geometryCollection(g) {
+             g.geometries = g.geometries.map(geometry);
+             return g;

            }
            }

-         };

 
 

-         return Tokenizer;
-       }());
+           if (!t) {
+             return t;
+           }

 
 

-       var noopTest$1 = helpers.noopTest;
-       var edit$1 = helpers.edit;
-       var merge$2 = helpers.merge;
+           switch (t.type) {
+             case "Feature":
+               return feature(t);

 
 

-       /**
-        * Block-Level Grammar
-        */
-       var block = {
-         newline: /^\n+/,
-         code: /^( {4}[^\n]+\n*)+/,
-         fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)/,
-         hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
-         heading: /^ {0,3}(#{1,6}) +([^\n]*?)(?: +#+)? *(?:\n+|$)/,
-         blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
-         list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
-         html: '^ {0,3}(?:' // optional indentation
-           + '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
-           + '|comment[^\\n]*(\\n+|$)' // (2)
-           + '|<\\?[\\s\\S]*?\\?>\\n*' // (3)
-           + '|<![A-Z][\\s\\S]*?>\\n*' // (4)
-           + '|<!\\[CDATA\\[[\\s\\S]*?\\]\\]>\\n*' // (5)
-           + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:\\n{2,}|$)' // (6)
-           + '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) open tag
-           + '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) closing tag
-           + ')',
-         def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
-         nptable: noopTest$1,
-         table: noopTest$1,
-         lheading: /^([^\n]+)\n {0,3}(=+|-+) *(?:\n+|$)/,
-         // regex template, placeholders will be replaced according to different paragraph
-         // interruption rules of commonmark and the original markdown spec:
-         _paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html)[^\n]+)*)/,
-         text: /^[^\n]+/
-       };
+             case "GeometryCollection":
+               return geometryCollection(t);

 
 

-       block._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
-       block._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
-       block.def = edit$1(block.def)
-         .replace('label', block._label)
-         .replace('title', block._title)
-         .getRegex();
-
-       block.bullet = /(?:[*+-]|\d{1,9}\.)/;
-       block.item = /^( *)(bull) ?[^\n]*(?:\n(?!\1bull ?)[^\n]*)*/;
-       block.item = edit$1(block.item, 'gm')
-         .replace(/bull/g, block.bullet)
-         .getRegex();
-
-       block.list = edit$1(block.list)
-         .replace(/bull/g, block.bullet)
-         .replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))')
-         .replace('def', '\\n+(?=' + block.def.source + ')')
-         .getRegex();
-
-       block._tag = 'address|article|aside|base|basefont|blockquote|body|caption'
-         + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption'
-         + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe'
-         + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option'
-         + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr'
-         + '|track|ul';
-       block._comment = /<!--(?!-?>)[\s\S]*?-->/;
-       block.html = edit$1(block.html, 'i')
-         .replace('comment', block._comment)
-         .replace('tag', block._tag)
-         .replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/)
-         .getRegex();
-
-       block.paragraph = edit$1(block._paragraph)
-         .replace('hr', block.hr)
-         .replace('heading', ' {0,3}#{1,6} ')
-         .replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
-         .replace('blockquote', ' {0,3}>')
-         .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
-         .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-         .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)')
-         .replace('tag', block._tag) // pars can be interrupted by type (6) html blocks
-         .getRegex();
-
-       block.blockquote = edit$1(block.blockquote)
-         .replace('paragraph', block.paragraph)
-         .getRegex();
+             case "FeatureCollection":
+               return featureCollection(t);

 
 

-       /**
-        * Normal Block Grammar
-        */
+             case "Point":
+             case "LineString":
+             case "Polygon":
+             case "MultiPoint":
+             case "MultiPolygon":
+             case "MultiLineString":
+               return geometry(t);
+
+             default:
+               return t;
+           }
+         }

 
 

-       block.normal = merge$2({}, block);
+         geojsonPrecision.exports = parse;
+         geojsonPrecision.exports.parse = parse;
+       })();

 
 

-       /**
-        * GFM Block Grammar
-        */
+       var precision = geojsonPrecision.exports;

 
 

-       block.gfm = merge$2({}, block.normal, {
-         nptable: '^ *([^|\\n ].*\\|.*)\\n' // Header
-           + ' *([-:]+ *\\|[-| :]*)' // Align
-           + '(?:\\n((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)', // Cells
-         table: '^ *\\|(.+)\\n' // Header
-           + ' *\\|?( *[-:]+[-| :]*)' // Align
-           + '(?:\\n *((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells
+       var $$d = _export;
+       var fails$5 = fails$N;
+       var toObject = toObject$i;
+       var toPrimitive = toPrimitive$7;
+
+       var FORCED$3 = fails$5(function () {
+         return new Date(NaN).toJSON() !== null
+           || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;

        });
 
        });
 

-       block.gfm.nptable = edit$1(block.gfm.nptable)
-         .replace('hr', block.hr)
-         .replace('heading', ' {0,3}#{1,6} ')
-         .replace('blockquote', ' {0,3}>')
-         .replace('code', ' {4}[^\\n]')
-         .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
-         .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-         .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)')
-         .replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
-         .getRegex();
-
-       block.gfm.table = edit$1(block.gfm.table)
-         .replace('hr', block.hr)
-         .replace('heading', ' {0,3}#{1,6} ')
-         .replace('blockquote', ' {0,3}>')
-         .replace('code', ' {4}[^\\n]')
-         .replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n')
-         .replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-         .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)')
-         .replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
-         .getRegex();
+       // `Date.prototype.toJSON` method
+       // https://tc39.es/ecma262/#sec-date.prototype.tojson
+       $$d({ target: 'Date', proto: true, forced: FORCED$3 }, {
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         toJSON: function toJSON(key) {
+           var O = toObject(this);
+           var pv = toPrimitive(O);
+           return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();
+         }
+       });

 
 

-       /**
-        * Pedantic grammar (original John Gruber's loose markdown specification)
-        */
+       var $$c = _export;

 
 

-       block.pedantic = merge$2({}, block.normal, {
-         html: edit$1(
-           '^ *(?:comment *(?:\\n|\\s*$)'
-           + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
-           + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))')
-           .replace('comment', block._comment)
-           .replace(/tag/g, '(?!(?:'
-             + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub'
-             + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)'
-             + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b')
-           .getRegex(),
-         def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
-         heading: /^ *(#{1,6}) *([^\n]+?) *(?:#+ *)?(?:\n+|$)/,
-         fences: noopTest$1, // fences not supported
-         paragraph: edit$1(block.normal._paragraph)
-           .replace('hr', block.hr)
-           .replace('heading', ' *#{1,6} *[^\n]')
-           .replace('lheading', block.lheading)
-           .replace('blockquote', ' {0,3}>')
-           .replace('|fences', '')
-           .replace('|list', '')
-           .replace('|html', '')
-           .getRegex()
+       // `URL.prototype.toJSON` method
+       // https://url.spec.whatwg.org/#dom-url-tojson
+       $$c({ target: 'URL', proto: true, enumerable: true }, {
+         toJSON: function toJSON() {
+           return URL.prototype.toString.call(this);
+         }

        });
 
        });
 

-       /**
-        * Inline-Level Grammar
-        */
-       var inline = {
-         escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
-         autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
-         url: noopTest$1,
-         tag: '^comment'
-           + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
-           + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
-           + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
-           + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
-           + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>', // CDATA section
-         link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
-         reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
-         nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
-         strong: /^__([^\s_])__(?!_)|^\*\*([^\s*])\*\*(?!\*)|^__([^\s][\s\S]*?[^\s])__(?!_)|^\*\*([^\s][\s\S]*?[^\s])\*\*(?!\*)/,
-         em: /^_([^\s_])_(?!_)|^_([^\s_<][\s\S]*?[^\s_])_(?!_|[^\spunctuation])|^_([^\s_<][\s\S]*?[^\s])_(?!_|[^\spunctuation])|^\*([^\s*<\[])\*(?!\*)|^\*([^\s<"][\s\S]*?[^\s\[\*])\*(?![\]`punctuation])|^\*([^\s*"<\[][\s\S]*[^\s])\*(?!\*)/,
-         code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
-         br: /^( {2,}|\\)\n(?!\s*$)/,
-         del: noopTest$1,
-         text: /^(`+|[^`])(?:[\s\S]*?(?:(?=[\\<!\[`*]|\b_|$)|[^ ](?= {2,}\n))|(?= {2,}\n))/
-       };
+       function isObject$3(obj) {
+         return _typeof(obj) === 'object' && obj !== null;
+       }
+
+       function forEach(obj, cb) {
+         if (Array.isArray(obj)) {
+           obj.forEach(cb);
+         } else if (isObject$3(obj)) {
+           Object.keys(obj).forEach(function (key) {
+             var val = obj[key];
+             cb(val, key);
+           });
+         }
+       }
+
+       function getTreeDepth(obj) {
+         var depth = 0;
+
+         if (Array.isArray(obj) || isObject$3(obj)) {
+           forEach(obj, function (val) {
+             if (Array.isArray(val) || isObject$3(val)) {
+               var tmpDepth = getTreeDepth(val);
+
+               if (tmpDepth > depth) {
+                 depth = tmpDepth;
+               }
+             }
+           });
+           return depth + 1;
+         }
+
+         return depth;
+       }
+
+       function stringify(obj, options) {
+         options = options || {};
+         var indent = JSON.stringify([1], null, get(options, 'indent', 2)).slice(2, -3);
+         var addMargin = get(options, 'margins', false);
+         var addArrayMargin = get(options, 'arrayMargins', false);
+         var addObjectMargin = get(options, 'objectMargins', false);
+         var maxLength = indent === '' ? Infinity : get(options, 'maxLength', 80);
+         var maxNesting = get(options, 'maxNesting', Infinity);
+         return function _stringify(obj, currentIndent, reserved) {
+           if (obj && typeof obj.toJSON === 'function') {
+             obj = obj.toJSON();
+           }
+
+           var string = JSON.stringify(obj);
+
+           if (string === undefined) {
+             return string;
+           }
+
+           var length = maxLength - currentIndent.length - reserved;
+           var treeDepth = getTreeDepth(obj);
+
+           if (treeDepth <= maxNesting && string.length <= length) {
+             var prettified = prettify(string, {
+               addMargin: addMargin,
+               addArrayMargin: addArrayMargin,
+               addObjectMargin: addObjectMargin
+             });
+
+             if (prettified.length <= length) {
+               return prettified;
+             }
+           }
+
+           if (isObject$3(obj)) {
+             var nextIndent = currentIndent + indent;
+             var items = [];
+             var delimiters;
+
+             var comma = function comma(array, index) {
+               return index === array.length - 1 ? 0 : 1;
+             };

 
 

-       // list of punctuation marks from common mark spec
-       // without ` and ] to workaround Rule 17 (inline code blocks/links)
-       inline._punctuation = '!"#$%&\'()*+\\-./:;<=>?@\\[^_{|}~';
-       inline.em = edit$1(inline.em).replace(/punctuation/g, inline._punctuation).getRegex();
+             if (Array.isArray(obj)) {
+               for (var index = 0; index < obj.length; index++) {
+                 items.push(_stringify(obj[index], nextIndent, comma(obj, index)) || 'null');
+               }

 
 

-       inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
+               delimiters = '[]';
+             } else {
+               Object.keys(obj).forEach(function (key, index, array) {
+                 var keyPart = JSON.stringify(key) + ': ';

 
 

-       inline._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
-       inline._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
-       inline.autolink = edit$1(inline.autolink)
-         .replace('scheme', inline._scheme)
-         .replace('email', inline._email)
-         .getRegex();
+                 var value = _stringify(obj[key], nextIndent, keyPart.length + comma(array, index));

 
 

-       inline._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
+                 if (value !== undefined) {
+                   items.push(keyPart + value);
+                 }
+               });
+               delimiters = '{}';
+             }

 
 

-       inline.tag = edit$1(inline.tag)
-         .replace('comment', block._comment)
-         .replace('attribute', inline._attribute)
-         .getRegex();
+             if (items.length > 0) {
+               return [delimiters[0], indent + items.join(',\n' + nextIndent), delimiters[1]].join('\n' + currentIndent);
+             }
+           }

 
 

-       inline._label = /(?:\[[^\[\]]*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
-       inline._href = /<(?:\\[<>]?|[^\s<>\\])*>|[^\s\x00-\x1f]*/;
-       inline._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
+           return string;
+         }(obj, '', 0);
+       } // Note: This regex matches even invalid JSON strings, but since we’re
+       // working on the output of `JSON.stringify` we know that only valid strings
+       // are present (unless the user supplied a weird `options.indent` but in
+       // that case we don’t care since the output would be invalid anyway).

 
 

-       inline.link = edit$1(inline.link)
-         .replace('label', inline._label)
-         .replace('href', inline._href)
-         .replace('title', inline._title)
-         .getRegex();

 
 

-       inline.reflink = edit$1(inline.reflink)
-         .replace('label', inline._label)
-         .getRegex();
+       var stringOrChar = /("(?:[^\\"]|\\.)*")|[:,\][}{]/g;

 
 

-       /**
-        * Normal Inline Grammar
-        */
+       function prettify(string, options) {
+         options = options || {};
+         var tokens = {
+           '{': '{',
+           '}': '}',
+           '[': '[',
+           ']': ']',
+           ',': ', ',
+           ':': ': '
+         };

 
 

-       inline.normal = merge$2({}, inline);
+         if (options.addMargin || options.addObjectMargin) {
+           tokens['{'] = '{ ';
+           tokens['}'] = ' }';
+         }

 
 

-       /**
-        * Pedantic Inline Grammar
-        */
+         if (options.addMargin || options.addArrayMargin) {
+           tokens['['] = '[ ';
+           tokens[']'] = ' ]';
+         }

 
 

-       inline.pedantic = merge$2({}, inline.normal, {
-         strong: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
-         em: /^_(?=\S)([\s\S]*?\S)_(?!_)|^\*(?=\S)([\s\S]*?\S)\*(?!\*)/,
-         link: edit$1(/^!?\[(label)\]\((.*?)\)/)
-           .replace('label', inline._label)
-           .getRegex(),
-         reflink: edit$1(/^!?\[(label)\]\s*\[([^\]]*)\]/)
-           .replace('label', inline._label)
-           .getRegex()
-       });
+         return string.replace(stringOrChar, function (match, string) {
+           return string ? match : tokens[match];
+         });
+       }

 
 

-       /**
-        * GFM Inline Grammar
-        */
+       function get(options, name, defaultValue) {
+         return name in options ? options[name] : defaultValue;
+       }

 
 

-       inline.gfm = merge$2({}, inline.normal, {
-         escape: edit$1(inline.escape).replace('])', '~|])').getRegex(),
-         _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
-         url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
-         _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
-         del: /^~+(?=\S)([\s\S]*?\S)~+/,
-         text: /^(`+|[^`])(?:[\s\S]*?(?:(?=[\\<!\[`*~]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))|(?= {2,}\n|[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))/
-       });
+       var jsonStringifyPrettyCompact = stringify;

 
 

-       inline.gfm.url = edit$1(inline.gfm.url, 'i')
-         .replace('email', inline.gfm._extended_email)
-         .getRegex();
-       /**
-        * GFM + Line Breaks Inline Grammar
-        */
+       var _default = /*#__PURE__*/function () {
+         // constructor
+         //
+         // `fc`  Optional FeatureCollection of known features
+         //
+         // Optionally pass a GeoJSON FeatureCollection of known features which we can refer to later.
+         // Each feature must have a filename-like `id`, for example: `something.geojson`
+         //
+         // {
+         //   "type": "FeatureCollection"
+         //   "features": [
+         //     {
+         //       "type": "Feature",
+         //       "id": "philly_metro.geojson",
+         //       "properties": { … },
+         //       "geometry": { … }
+         //     }
+         //   ]
+         // }
+         function _default(fc) {
+           var _this = this;

 
 

-       inline.breaks = merge$2({}, inline.gfm, {
-         br: edit$1(inline.br).replace('{2,}', '*').getRegex(),
-         text: edit$1(inline.gfm.text)
-           .replace('\\b_', '\\b_| {2,}\\n')
-           .replace(/\{2,\}/g, '*')
-           .getRegex()
-       });
+           _classCallCheck$1(this, _default);

 
 

-       var rules = {
-         block: block,
-         inline: inline
-       };
+           // The _cache retains resolved features, so if you ask for the same thing multiple times
+           // we don't repeat the expensive resolving/clipping operations.
+           //
+           // Each feature has a stable identifier that is used as the cache key.
+           // The identifiers look like:
+           // - for point locations, the stringified point:          e.g. '[8.67039,49.41882]'
+           // - for geojson locations, the geojson id:               e.g. 'de-hamburg.geojson'
+           // - for countrycoder locations, feature.id property:     e.g. 'Q2'  (countrycoder uses Wikidata identifiers)
+           // - for aggregated locationSets, +[include]-[exclude]:   e.g '+[Q2]-[Q18,Q27611]'
+           this._cache = {}; // When strict mode = true, throw on invalid locations or locationSets.
+           // When strict mode = false, return `null` for invalid locations or locationSets.

 
 

-       var defaults$2 = defaults.defaults;
-       var block$1 = rules.block;
-       var inline$1 = rules.inline;
+           this._strict = true; // process input FeatureCollection

 
 

-       /**
-        * smartypants text replacement
-        */
-       function smartypants(text) {
-         return text
-           // em-dashes
-           .replace(/---/g, '\u2014')
-           // en-dashes
-           .replace(/--/g, '\u2013')
-           // opening singles
-           .replace(/(^|[-\u2014/(\[{"\s])'/g, '$1\u2018')
-           // closing singles & apostrophes
-           .replace(/'/g, '\u2019')
-           // opening doubles
-           .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, '$1\u201c')
-           // closing doubles
-           .replace(/"/g, '\u201d')
-           // ellipses
-           .replace(/\.{3}/g, '\u2026');
-       }
+           if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
+             fc.features.forEach(function (feature) {
+               feature.properties = feature.properties || {};
+               var props = feature.properties; // Get `id` from either `id` or `properties`

 
 

-       /**
-        * mangle email addresses
-        */
-       function mangle(text) {
-         var out = '',
-           i,
-           ch;
+               var id = feature.id || props.id;
+               if (!id || !/^\S+\.geojson$/i.test(id)) return; // Ensure `id` exists and is lowercase

 
 

-         var l = text.length;
-         for (i = 0; i < l; i++) {
-           ch = text.charCodeAt(i);
-           if (Math.random() > 0.5) {
-             ch = 'x' + ch.toString(16);
-           }
-           out += '&#' + ch + ';';
-         }
+               id = id.toLowerCase();
+               feature.id = id;
+               props.id = id; // Ensure `area` property exists

 
 

-         return out;
-       }
+               if (!props.area) {
+                 var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²

 
 

-       /**
-        * Block Lexer
-        */
-       var Lexer_1 = /*@__PURE__*/(function () {
-         function Lexer(options) {
-           this.tokens = [];
-           this.tokens.links = Object.create(null);
-           this.options = options || defaults$2;
-           this.options.tokenizer = this.options.tokenizer || new Tokenizer_1();
-           this.tokenizer = this.options.tokenizer;
-           this.tokenizer.options = this.options;
+                 props.area = Number(area.toFixed(2));
+               }

 
 

-           var rules = {
-             block: block$1.normal,
-             inline: inline$1.normal
-           };
+               _this._cache[id] = feature;
+             });
+           } // Replace CountryCoder world geometry to be a polygon covering the world.

 
 

-           if (this.options.pedantic) {
-             rules.block = block$1.pedantic;
-             rules.inline = inline$1.pedantic;
-           } else if (this.options.gfm) {
-             rules.block = block$1.gfm;
-             if (this.options.breaks) {
-               rules.inline = inline$1.breaks;
-             } else {
-               rules.inline = inline$1.gfm;
-             }
-           }
-           this.tokenizer.rules = rules;
-         }

 
 

-         var staticAccessors = { rules: { configurable: true } };
+           var world = _cloneDeep(feature$1('Q2'));

 
 

-         /**
-          * Expose Rules
-          */
-         staticAccessors.rules.get = function () {
-           return {
-             block: block$1,
-             inline: inline$1
+           world.geometry = {
+             type: 'Polygon',
+             coordinates: [[[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]]]

            };
            };

-         };
+           world.id = 'Q2';
+           world.properties.id = 'Q2';
+           world.properties.area = geojsonArea.geometry(world.geometry) / 1e6; // m² to km²

 
 

-         /**
-          * Static Lex Method
-          */
-         Lexer.lex = function lex (src, options) {
-           var lexer = new Lexer(options);
-           return lexer.lex(src);
-         };
+           this._cache.Q2 = world;
+         } // validateLocation
+         // `location`  The location to validate
+         //
+         // Pass a `location` value to validate
+         //
+         // Returns a result like:
+         //   {
+         //     type:     'point', 'geojson', or 'countrycoder'
+         //     location:  the queried location
+         //     id:        the stable identifier for the feature
+         //   }
+         // or `null` if the location is invalid
+         //

 
 

-         /**
-          * Preprocessing
-          */
-         Lexer.prototype.lex = function lex (src) {
-           src = src
-             .replace(/\r\n|\r/g, '\n')
-             .replace(/\t/g, '    ');

 
 

-           this.blockTokens(src, this.tokens, true);
+         _createClass$1(_default, [{
+           key: "validateLocation",
+           value: function validateLocation(location) {
+             if (Array.isArray(location) && (location.length === 2 || location.length === 3)) {
+               // [lon, lat] or [lon, lat, radius] point?
+               var lon = location[0];
+               var lat = location[1];
+               var radius = location[2];

 
 

-           this.inline(this.tokens);
+               if (Number.isFinite(lon) && lon >= -180 && lon <= 180 && Number.isFinite(lat) && lat >= -90 && lat <= 90 && (location.length === 2 || Number.isFinite(radius) && radius > 0)) {
+                 var id = '[' + location.toString() + ']';
+                 return {
+                   type: 'point',
+                   location: location,
+                   id: id
+                 };
+               }
+             } else if (typeof location === 'string' && /^\S+\.geojson$/i.test(location)) {
+               // a .geojson filename?
+               var _id = location.toLowerCase();

 
 

-           return this.tokens;
-         };
+               if (this._cache[_id]) {
+                 return {
+                   type: 'geojson',
+                   location: location,
+                   id: _id
+                 };
+               }
+             } else if (typeof location === 'string' || typeof location === 'number') {
+               // a country-coder value?
+               var feature = feature$1(location);

 
 

-         /**
-          * Lexing
-          */
-         Lexer.prototype.blockTokens = function blockTokens (src, tokens, top) {
-           if ( tokens === void 0 ) tokens = [];
-           if ( top === void 0 ) top = true;
-
-           src = src.replace(/^ +$/gm, '');
-           var token, i, l;
-
-           while (src) {
-             // newline
-             if (token = this.tokenizer.space(src)) {
-               src = src.substring(token.raw.length);
-               if (token.type) {
-                 tokens.push(token);
+               if (feature) {
+                 // Use wikidata QID as the identifier, since that seems to be the one
+                 // property that everything in CountryCoder is guaranteed to have.
+                 var _id2 = feature.properties.wikidata;
+                 return {
+                   type: 'countrycoder',
+                   location: location,
+                   id: _id2
+                 };

                }
                }

-               continue;

              }
 
              }
 

-             // code
-             if (token = this.tokenizer.code(src, tokens)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
+             if (this._strict) {
+               throw new Error("validateLocation:  Invalid location: \"".concat(location, "\"."));
+             } else {
+               return null;

              }
              }

+           } // resolveLocation
+           // `location`  The location to resolve
+           //
+           // Pass a `location` value to resolve
+           //
+           // Returns a result like:
+           //   {
+           //     type:      'point', 'geojson', or 'countrycoder'
+           //     location:  the queried location
+           //     id:        a stable identifier for the feature
+           //     feature:   the resolved GeoJSON feature
+           //   }
+           //  or `null` if the location is invalid
+           //

 
 

-             // fences
-             if (token = this.tokenizer.fences(src)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
-             }
+         }, {
+           key: "resolveLocation",
+           value: function resolveLocation(location) {
+             var valid = this.validateLocation(location);
+             if (!valid) return null;
+             var id = valid.id; // Return a result from cache if we can
+
+             if (this._cache[id]) {
+               return Object.assign(valid, {
+                 feature: this._cache[id]
+               });
+             } // A [lon,lat] coordinate pair?

 
 

-             // heading
-             if (token = this.tokenizer.heading(src)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
-             }

 
 

-             // table no leading pipe (gfm)
-             if (token = this.tokenizer.nptable(src)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
-             }
+             if (valid.type === 'point') {
+               var lon = location[0];
+               var lat = location[1];
+               var radius = location[2] || 25; // km

 
 

-             // hr
-             if (token = this.tokenizer.hr(src)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
+               var EDGES = 10;
+               var PRECISION = 3;
+               var area = Math.PI * radius * radius;
+               var feature = this._cache[id] = precision({
+                 type: 'Feature',
+                 id: id,
+                 properties: {
+                   id: id,
+                   area: Number(area.toFixed(2))
+                 },
+                 geometry: circleToPolygon([lon, lat], radius * 1000, EDGES) // km to m
+
+               }, PRECISION);
+               return Object.assign(valid, {
+                 feature: feature
+               }); // A .geojson filename?
+             } else if (valid.type === 'geojson') ; else if (valid.type === 'countrycoder') {
+               var _feature = _cloneDeep(feature$1(id));
+
+               var props = _feature.properties; // -> This block of code is weird and requires some explanation. <-
+               // CountryCoder includes higher level features which are made up of members.
+               // These features don't have their own geometry, but CountryCoder provides an
+               //   `aggregateFeature` method to combine these members into a MultiPolygon.
+               // In the past, Turf/JSTS/martinez could not handle the aggregated features,
+               //   so we'd iteratively union them all together.  (this was slow)
+               // But now mfogel/polygon-clipping handles these MultiPolygons like a boss.
+               // This approach also has the benefit of removing all the internal boaders and
+               //   simplifying the regional polygons a lot.
+
+               if (Array.isArray(props.members)) {
+                 var aggregate = aggregateFeature(id);
+                 aggregate.geometry.coordinates = _clip([aggregate], 'UNION').geometry.coordinates;
+                 _feature.geometry = aggregate.geometry;
+               } // Ensure `area` property exists
+
+
+               if (!props.area) {
+                 var _area = geojsonArea.geometry(_feature.geometry) / 1e6; // m² to km²
+
+
+                 props.area = Number(_area.toFixed(2));
+               } // Ensure `id` property exists
+
+
+               _feature.id = id;
+               props.id = id;
+               this._cache[id] = _feature;
+               return Object.assign(valid, {
+                 feature: _feature
+               });

              }
 
              }
 

-             // blockquote
-             if (token = this.tokenizer.blockquote(src)) {
-               src = src.substring(token.raw.length);
-               token.tokens = this.blockTokens(token.text, [], top);
-               tokens.push(token);
-               continue;
+             if (this._strict) {
+               throw new Error("resolveLocation:  Couldn't resolve location \"".concat(location, "\"."));
+             } else {
+               return null;

              }
              }

+           } // validateLocationSet
+           // `locationSet`  the locationSet to validate
+           //
+           // Pass a locationSet Object to validate like:
+           //   {
+           //     include: [ Array of locations ],
+           //     exclude: [ Array of locations ]
+           //   }
+           //
+           // Returns a result like:
+           //   {
+           //     type:         'locationset'
+           //     locationSet:  the queried locationSet
+           //     id:           the stable identifier for the feature
+           //   }
+           // or `null` if the locationSet is invalid
+           //

 
 

-             // list
-             if (token = this.tokenizer.list(src)) {
-               src = src.substring(token.raw.length);
-               l = token.items.length;
-               for (i = 0; i < l; i++) {
-                 token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
-               }
-               tokens.push(token);
-               continue;
+         }, {
+           key: "validateLocationSet",
+           value: function validateLocationSet(locationSet) {
+             locationSet = locationSet || {};
+             var validator = this.validateLocation.bind(this);
+             var include = (locationSet.include || []).map(validator).filter(Boolean);
+             var exclude = (locationSet.exclude || []).map(validator).filter(Boolean);
+
+             if (!include.length) {
+               if (this._strict) {
+                 throw new Error("validateLocationSet:  LocationSet includes nothing.");
+               } else {
+                 // non-strict mode, replace an empty locationSet with one that includes "the world"
+                 locationSet.include = ['Q2'];
+                 include = [{
+                   type: 'countrycoder',
+                   location: 'Q2',
+                   id: 'Q2'
+                 }];
+               }
+             } // Generate stable identifier
+
+
+             include.sort(_sortLocations);
+             var id = '+[' + include.map(function (d) {
+               return d.id;
+             }).join(',') + ']';
+
+             if (exclude.length) {
+               exclude.sort(_sortLocations);
+               id += '-[' + exclude.map(function (d) {
+                 return d.id;
+               }).join(',') + ']';

              }
 
              }
 

-             // html
-             if (token = this.tokenizer.html(src)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
-             }
+             return {
+               type: 'locationset',
+               locationSet: locationSet,
+               id: id
+             };
+           } // resolveLocationSet
+           // `locationSet`  the locationSet to resolve
+           //
+           // Pass a locationSet Object to validate like:
+           //   {
+           //     include: [ Array of locations ],
+           //     exclude: [ Array of locations ]
+           //   }
+           //
+           // Returns a result like:
+           //   {
+           //     type:         'locationset'
+           //     locationSet:  the queried locationSet
+           //     id:           the stable identifier for the feature
+           //     feature:      the resolved GeoJSON feature
+           //   }
+           // or `null` if the locationSet is invalid
+           //

 
 

-             // def
-             if (top && (token = this.tokenizer.def(src))) {
-               src = src.substring(token.raw.length);
-               if (!this.tokens.links[token.tag]) {
-                 this.tokens.links[token.tag] = {
-                   href: token.href,
-                   title: token.title
-                 };
-               }
-               continue;
+         }, {
+           key: "resolveLocationSet",
+           value: function resolveLocationSet(locationSet) {
+             locationSet = locationSet || {};
+             var valid = this.validateLocationSet(locationSet);
+             if (!valid) return null;
+             var id = valid.id; // Return a result from cache if we can
+
+             if (this._cache[id]) {
+               return Object.assign(valid, {
+                 feature: this._cache[id]
+               });

              }
 
              }
 

-             // table (gfm)
-             if (token = this.tokenizer.table(src)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
-             }
+             var resolver = this.resolveLocation.bind(this);
+             var includes = (locationSet.include || []).map(resolver).filter(Boolean);
+             var excludes = (locationSet.exclude || []).map(resolver).filter(Boolean); // Return quickly if it's a single included location..

 
 

-             // lheading
-             if (token = this.tokenizer.lheading(src)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
-             }
+             if (includes.length === 1 && excludes.length === 0) {
+               return Object.assign(valid, {
+                 feature: includes[0].feature
+               });
+             } // Calculate unions

 
 

-             // top-level paragraph
-             if (top && (token = this.tokenizer.paragraph(src))) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
-             }

 
 

-             // text
-             if (token = this.tokenizer.text(src)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
-             }
+             var includeGeoJSON = _clip(includes.map(function (d) {
+               return d.feature;
+             }), 'UNION');

 
 

-             if (src) {
-               var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
-               if (this.options.silent) {
-                 console.error(errMsg);
-                 break;
-               } else {
-                 throw new Error(errMsg);
-               }
-             }
-           }
+             var excludeGeoJSON = _clip(excludes.map(function (d) {
+               return d.feature;
+             }), 'UNION'); // Calculate difference, update `area` and return result

 
 

-           return tokens;
-         };

 
 

-         Lexer.prototype.inline = function inline (tokens) {
-           var i,
-             j,
-             k,
-             l2,
-             row,
-             token;
+             var resultGeoJSON = excludeGeoJSON ? _clip([includeGeoJSON, excludeGeoJSON], 'DIFFERENCE') : includeGeoJSON;
+             var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6; // m² to km²

 
 

-           var l = tokens.length;
-           for (i = 0; i < l; i++) {
-             token = tokens[i];
-             switch (token.type) {
-               case 'paragraph':
-               case 'text':
-               case 'heading': {
-                 token.tokens = [];
-                 this.inlineTokens(token.text, token.tokens);
-                 break;
-               }
-               case 'table': {
-                 token.tokens = {
-                   header: [],
-                   cells: []
-                 };
+             resultGeoJSON.id = id;
+             resultGeoJSON.properties = {
+               id: id,
+               area: Number(area.toFixed(2))
+             };
+             this._cache[id] = resultGeoJSON;
+             return Object.assign(valid, {
+               feature: resultGeoJSON
+             });
+           } // strict
+           //

 
 

-                 // header
-                 l2 = token.header.length;
-                 for (j = 0; j < l2; j++) {
-                   token.tokens.header[j] = [];
-                   this.inlineTokens(token.header[j], token.tokens.header[j]);
-                 }
+         }, {
+           key: "strict",
+           value: function strict(val) {
+             if (val === undefined) {
+               // get
+               return this._strict;
+             } else {
+               // set
+               this._strict = val;
+               return this;
+             }
+           } // cache
+           // convenience method to access the internal cache

 
 

-                 // cells
-                 l2 = token.cells.length;
-                 for (j = 0; j < l2; j++) {
-                   row = token.cells[j];
-                   token.tokens.cells[j] = [];
-                   for (k = 0; k < row.length; k++) {
-                     token.tokens.cells[j][k] = [];
-                     this.inlineTokens(row[k], token.tokens.cells[j][k]);
-                   }
-                 }
+         }, {
+           key: "cache",
+           value: function cache() {
+             return this._cache;
+           } // stringify
+           // convenience method to prettyStringify the given object

 
 

-                 break;
-               }
-               case 'blockquote': {
-                 this.inline(token.tokens);
-                 break;
-               }
-               case 'list': {
-                 l2 = token.items.length;
-                 for (j = 0; j < l2; j++) {
-                   this.inline(token.items[j].tokens);
-                 }
-                 break;
-               }
-             }
+         }, {
+           key: "stringify",
+           value: function stringify(obj, options) {
+             return jsonStringifyPrettyCompact(obj, options);
+           }
+         }]);
+
+         return _default;
+       }(); // Wrap the mfogel/polygon-clipping library and return a GeoJSON feature.
+
+       function _clip(features, which) {
+         if (!Array.isArray(features) || !features.length) return null;
+         var fn = {
+           UNION: index.union,
+           DIFFERENCE: index.difference
+         }[which];
+         var args = features.map(function (feature) {
+           return feature.geometry.coordinates;
+         });
+         var coords = fn.apply(null, args);
+         return {
+           type: 'Feature',
+           properties: {},
+           geometry: {
+             type: whichType(coords),
+             coordinates: coords

            }
            }

+         }; // is this a Polygon or a MultiPolygon?
+
+         function whichType(coords) {
+           var a = Array.isArray(coords);
+           var b = a && Array.isArray(coords[0]);
+           var c = b && Array.isArray(coords[0][0]);
+           var d = c && Array.isArray(coords[0][0][0]);
+           return d ? 'MultiPolygon' : 'Polygon';
+         }
+       }
+
+       function _cloneDeep(obj) {
+         return JSON.parse(JSON.stringify(obj));
+       } // Sorting the location lists is ok because they end up unioned together.
+       // This sorting makes it possible to generate a deterministic id.

 
 

-           return tokens;
+
+       function _sortLocations(a, b) {
+         var rank = {
+           countrycoder: 1,
+           geojson: 2,
+           point: 3

          };
          };

+         var aRank = rank[a.type];
+         var bRank = rank[b.type];
+         return aRank > bRank ? 1 : aRank < bRank ? -1 : a.id.localeCompare(b.id);
+       }

 
 

-         /**
-          * Lexing/Compiling
-          */
-         Lexer.prototype.inlineTokens = function inlineTokens (src, tokens, inLink, inRawBlock) {
-           if ( tokens === void 0 ) tokens = [];
-           if ( inLink === void 0 ) inLink = false;
-           if ( inRawBlock === void 0 ) inRawBlock = false;
-
-           var token;
-
-           while (src) {
-             // escape
-             if (token = this.tokenizer.escape(src)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
-             }
+       var $$b = _export;

 
 

-             // tag
-             if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
-               src = src.substring(token.raw.length);
-               inLink = token.inLink;
-               inRawBlock = token.inRawBlock;
-               tokens.push(token);
-               continue;
+       // `Number.MAX_SAFE_INTEGER` constant
+       // https://tc39.es/ecma262/#sec-number.max_safe_integer
+       $$b({ target: 'Number', stat: true }, {
+         MAX_SAFE_INTEGER: 0x1FFFFFFFFFFFFF
+       });
+
+       var aesJs = {exports: {}};
+
+       (function (module, exports) {
+         (function (root) {
+
+           function checkInt(value) {
+             return parseInt(value) === value;
+           }
+
+           function checkInts(arrayish) {
+             if (!checkInt(arrayish.length)) {
+               return false;

              }
 
              }
 

-             // link
-             if (token = this.tokenizer.link(src)) {
-               src = src.substring(token.raw.length);
-               if (token.type === 'link') {
-                 token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+             for (var i = 0; i < arrayish.length; i++) {
+               if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
+                 return false;

                }
                }

-               tokens.push(token);
-               continue;

              }
 
              }
 

-             // reflink, nolink
-             if (token = this.tokenizer.reflink(src, this.tokens.links)) {
-               src = src.substring(token.raw.length);
-               if (token.type === 'link') {
-                 token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+             return true;
+           }
+
+           function coerceArray(arg, copy) {
+             // ArrayBuffer view
+             if (arg.buffer && arg.name === 'Uint8Array') {
+               if (copy) {
+                 if (arg.slice) {
+                   arg = arg.slice();
+                 } else {
+                   arg = Array.prototype.slice.call(arg);
+                 }

                }
                }

-               tokens.push(token);
-               continue;
-             }

 
 

-             // strong
-             if (token = this.tokenizer.strong(src)) {
-               src = src.substring(token.raw.length);
-               token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-               tokens.push(token);
-               continue;
-             }
+               return arg;
+             } // It's an array; check it is a valid representation of a byte

 
 

-             // em
-             if (token = this.tokenizer.em(src)) {
-               src = src.substring(token.raw.length);
-               token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-               tokens.push(token);
-               continue;
-             }

 
 

-             // code
-             if (token = this.tokenizer.codespan(src)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
-             }
+             if (Array.isArray(arg)) {
+               if (!checkInts(arg)) {
+                 throw new Error('Array contains invalid value: ' + arg);
+               }

 
 

-             // br
-             if (token = this.tokenizer.br(src)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
-             }
+               return new Uint8Array(arg);
+             } // Something else, but behaves like an array (maybe a Buffer? Arguments?)

 
 

-             // del (gfm)
-             if (token = this.tokenizer.del(src)) {
-               src = src.substring(token.raw.length);
-               token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-               tokens.push(token);
-               continue;
-             }

 
 

-             // autolink
-             if (token = this.tokenizer.autolink(src, mangle)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
+             if (checkInt(arg.length) && checkInts(arg)) {
+               return new Uint8Array(arg);

              }
 
              }
 

-             // url (gfm)
-             if (!inLink && (token = this.tokenizer.url(src, mangle))) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
-             }
+             throw new Error('unsupported array-like object');
+           }

 
 

-             // text
-             if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
-               src = src.substring(token.raw.length);
-               tokens.push(token);
-               continue;
-             }
+           function createArray(length) {
+             return new Uint8Array(length);
+           }

 
 

-             if (src) {
-               var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
-               if (this.options.silent) {
-                 console.error(errMsg);
-                 break;
+           function copyArray(sourceArray, targetArray, targetStart, sourceStart, sourceEnd) {
+             if (sourceStart != null || sourceEnd != null) {
+               if (sourceArray.slice) {
+                 sourceArray = sourceArray.slice(sourceStart, sourceEnd);

                } else {
                } else {

-                 throw new Error(errMsg);
+                 sourceArray = Array.prototype.slice.call(sourceArray, sourceStart, sourceEnd);

                }
              }
                }
              }

+
+             targetArray.set(sourceArray, targetStart);

            }
 
            }
 

-           return tokens;
-         };
+           var convertUtf8 = function () {
+             function toBytes(text) {
+               var result = [],
+                   i = 0;
+               text = encodeURI(text);

 
 

-         Object.defineProperties( Lexer, staticAccessors );
+               while (i < text.length) {
+                 var c = text.charCodeAt(i++); // if it is a % sign, encode the following 2 bytes as a hex value

 
 

-         return Lexer;
-       }());
+                 if (c === 37) {
+                   result.push(parseInt(text.substr(i, 2), 16));
+                   i += 2; // otherwise, just the actual byte
+                 } else {
+                   result.push(c);
+                 }
+               }

 
 

-       var defaults$3 = defaults.defaults;
-       var cleanUrl$1 = helpers.cleanUrl;
-       var escape$3 = helpers.escape;
+               return coerceArray(result);
+             }

 
 

-       /**
-        * Renderer
-        */
-       var Renderer_1 = /*@__PURE__*/(function () {
-         function Renderer(options) {
-           this.options = options || defaults$3;
-         }
+             function fromBytes(bytes) {
+               var result = [],
+                   i = 0;

 
 

-         Renderer.prototype.code = function code (code$1, infostring, escaped) {
-           var lang = (infostring || '').match(/\S*/)[0];
-           if (this.options.highlight) {
-             var out = this.options.highlight(code$1, lang);
-             if (out != null && out !== code$1) {
-               escaped = true;
-               code$1 = out;
-             }
-           }
+               while (i < bytes.length) {
+                 var c = bytes[i];

 
 

-           if (!lang) {
-             return '<pre><code>'
-               + (escaped ? code$1 : escape$3(code$1, true))
-               + '</code></pre>';
-           }
+                 if (c < 128) {
+                   result.push(String.fromCharCode(c));
+                   i++;
+                 } else if (c > 191 && c < 224) {
+                   result.push(String.fromCharCode((c & 0x1f) << 6 | bytes[i + 1] & 0x3f));
+                   i += 2;
+                 } else {
+                   result.push(String.fromCharCode((c & 0x0f) << 12 | (bytes[i + 1] & 0x3f) << 6 | bytes[i + 2] & 0x3f));
+                   i += 3;
+                 }
+               }

 
 

-           return '<pre><code class="'
-             + this.options.langPrefix
-             + escape$3(lang, true)
-             + '">'
-             + (escaped ? code$1 : escape$3(code$1, true))
-             + '</code></pre>\n';
-         };
+               return result.join('');
+             }

 
 

-         Renderer.prototype.blockquote = function blockquote (quote) {
-           return '<blockquote>\n' + quote + '</blockquote>\n';
-         };
+             return {
+               toBytes: toBytes,
+               fromBytes: fromBytes
+             };
+           }();

 
 

-         Renderer.prototype.html = function html (html$1) {
-           return html$1;
-         };
+           var convertHex = function () {
+             function toBytes(text) {
+               var result = [];

 
 

-         Renderer.prototype.heading = function heading (text, level, raw, slugger) {
-           if (this.options.headerIds) {
-             return '<h'
-               + level
-               + ' id="'
-               + this.options.headerPrefix
-               + slugger.slug(raw)
-               + '">'
-               + text
-               + '</h'
-               + level
-               + '>\n';
-           }
-           // ignore IDs
-           return '<h' + level + '>' + text + '</h' + level + '>\n';
-         };
+               for (var i = 0; i < text.length; i += 2) {
+                 result.push(parseInt(text.substr(i, 2), 16));
+               }

 
 

-         Renderer.prototype.hr = function hr () {
-           return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
-         };
+               return result;
+             } // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html

 
 

-         Renderer.prototype.list = function list (body, ordered, start) {
-           var type = ordered ? 'ol' : 'ul',
-             startatt = (ordered && start !== 1) ? (' start="' + start + '"') : '';
-           return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
-         };

 
 

-         Renderer.prototype.listitem = function listitem (text) {
-           return '<li>' + text + '</li>\n';
-         };
+             var Hex = '0123456789abcdef';

 
 

-         Renderer.prototype.checkbox = function checkbox (checked) {
-           return '<input '
-             + (checked ? 'checked="" ' : '')
-             + 'disabled="" type="checkbox"'
-             + (this.options.xhtml ? ' /' : '')
-             + '> ';
-         };
+             function fromBytes(bytes) {
+               var result = [];

 
 

-         Renderer.prototype.paragraph = function paragraph (text) {
-           return '<p>' + text + '</p>\n';
-         };
+               for (var i = 0; i < bytes.length; i++) {
+                 var v = bytes[i];
+                 result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
+               }

 
 

-         Renderer.prototype.table = function table (header, body) {
-           if (body) { body = '<tbody>' + body + '</tbody>'; }
+               return result.join('');
+             }

 
 

-           return '<table>\n'
-             + '<thead>\n'
-             + header
-             + '</thead>\n'
-             + body
-             + '</table>\n';
-         };
+             return {
+               toBytes: toBytes,
+               fromBytes: fromBytes
+             };
+           }(); // Number of rounds by keysize

 
 

-         Renderer.prototype.tablerow = function tablerow (content) {
-           return '<tr>\n' + content + '</tr>\n';
-         };

 
 

-         Renderer.prototype.tablecell = function tablecell (content, flags) {
-           var type = flags.header ? 'th' : 'td';
-           var tag = flags.align
-             ? '<' + type + ' align="' + flags.align + '">'
-             : '<' + type + '>';
-           return tag + content + '</' + type + '>\n';
-         };
+           var numberOfRounds = {
+             16: 10,
+             24: 12,
+             32: 14
+           }; // Round constant words

 
 

-         // span level renderer
-         Renderer.prototype.strong = function strong (text) {
-           return '<strong>' + text + '</strong>';
-         };
+           var rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91]; // S-box and Inverse S-box (S is for Substitution)

 
 

-         Renderer.prototype.em = function em (text) {
-           return '<em>' + text + '</em>';
-         };
+           var S = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16];
+           var Si = [0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d]; // Transformations for encryption

 
 

-         Renderer.prototype.codespan = function codespan (text) {
-           return '<code>' + text + '</code>';
-         };
+           var T1 = [0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4, 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12, 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a];
+           var T2 = [0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0, 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, 0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a, 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5, 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2, 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c, 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e, 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616];
+           var T3 = [0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, 0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a, 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c, 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008, 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e, 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, 0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16];
+           var T4 = [0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, 0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f, 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8, 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810, 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c, 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c]; // Transformations for decryption

 
 

-         Renderer.prototype.br = function br () {
-           return this.options.xhtml ? '<br/>' : '<br>';
-         };
+           var T5 = [0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742];
+           var T6 = [0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857];
+           var T7 = [0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8];
+           var T8 = [0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0]; // Transformations for decryption key expansion

 
 

-         Renderer.prototype.del = function del (text) {
-           return '<del>' + text + '</del>';
-         };
+           var U1 = [0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3];
+           var U2 = [0x00000000, 0x0b0e090d, 0x161c121a, 0x1d121b17, 0x2c382434, 0x27362d39, 0x3a24362e, 0x312a3f23, 0x58704868, 0x537e4165, 0x4e6c5a72, 0x4562537f, 0x74486c5c, 0x7f466551, 0x62547e46, 0x695a774b, 0xb0e090d0, 0xbbee99dd, 0xa6fc82ca, 0xadf28bc7, 0x9cd8b4e4, 0x97d6bde9, 0x8ac4a6fe, 0x81caaff3, 0xe890d8b8, 0xe39ed1b5, 0xfe8ccaa2, 0xf582c3af, 0xc4a8fc8c, 0xcfa6f581, 0xd2b4ee96, 0xd9bae79b, 0x7bdb3bbb, 0x70d532b6, 0x6dc729a1, 0x66c920ac, 0x57e31f8f, 0x5ced1682, 0x41ff0d95, 0x4af10498, 0x23ab73d3, 0x28a57ade, 0x35b761c9, 0x3eb968c4, 0x0f9357e7, 0x049d5eea, 0x198f45fd, 0x12814cf0, 0xcb3bab6b, 0xc035a266, 0xdd27b971, 0xd629b07c, 0xe7038f5f, 0xec0d8652, 0xf11f9d45, 0xfa119448, 0x934be303, 0x9845ea0e, 0x8557f119, 0x8e59f814, 0xbf73c737, 0xb47dce3a, 0xa96fd52d, 0xa261dc20, 0xf6ad766d, 0xfda37f60, 0xe0b16477, 0xebbf6d7a, 0xda955259, 0xd19b5b54, 0xcc894043, 0xc787494e, 0xaedd3e05, 0xa5d33708, 0xb8c12c1f, 0xb3cf2512, 0x82e51a31, 0x89eb133c, 0x94f9082b, 0x9ff70126, 0x464de6bd, 0x4d43efb0, 0x5051f4a7, 0x5b5ffdaa, 0x6a75c289, 0x617bcb84, 0x7c69d093, 0x7767d99e, 0x1e3daed5, 0x1533a7d8, 0x0821bccf, 0x032fb5c2, 0x32058ae1, 0x390b83ec, 0x241998fb, 0x2f1791f6, 0x8d764dd6, 0x867844db, 0x9b6a5fcc, 0x906456c1, 0xa14e69e2, 0xaa4060ef, 0xb7527bf8, 0xbc5c72f5, 0xd50605be, 0xde080cb3, 0xc31a17a4, 0xc8141ea9, 0xf93e218a, 0xf2302887, 0xef223390, 0xe42c3a9d, 0x3d96dd06, 0x3698d40b, 0x2b8acf1c, 0x2084c611, 0x11aef932, 0x1aa0f03f, 0x07b2eb28, 0x0cbce225, 0x65e6956e, 0x6ee89c63, 0x73fa8774, 0x78f48e79, 0x49deb15a, 0x42d0b857, 0x5fc2a340, 0x54ccaa4d, 0xf741ecda, 0xfc4fe5d7, 0xe15dfec0, 0xea53f7cd, 0xdb79c8ee, 0xd077c1e3, 0xcd65daf4, 0xc66bd3f9, 0xaf31a4b2, 0xa43fadbf, 0xb92db6a8, 0xb223bfa5, 0x83098086, 0x8807898b, 0x9515929c, 0x9e1b9b91, 0x47a17c0a, 0x4caf7507, 0x51bd6e10, 0x5ab3671d, 0x6b99583e, 0x60975133, 0x7d854a24, 0x768b4329, 0x1fd13462, 0x14df3d6f, 0x09cd2678, 0x02c32f75, 0x33e91056, 0x38e7195b, 0x25f5024c, 0x2efb0b41, 0x8c9ad761, 0x8794de6c, 0x9a86c57b, 0x9188cc76, 0xa0a2f355, 0xabacfa58, 0xb6bee14f, 0xbdb0e842, 0xd4ea9f09, 0xdfe49604, 0xc2f68d13, 0xc9f8841e, 0xf8d2bb3d, 0xf3dcb230, 0xeecea927, 0xe5c0a02a, 0x3c7a47b1, 0x37744ebc, 0x2a6655ab, 0x21685ca6, 0x10426385, 0x1b4c6a88, 0x065e719f, 0x0d507892, 0x640a0fd9, 0x6f0406d4, 0x72161dc3, 0x791814ce, 0x48322bed, 0x433c22e0, 0x5e2e39f7, 0x552030fa, 0x01ec9ab7, 0x0ae293ba, 0x17f088ad, 0x1cfe81a0, 0x2dd4be83, 0x26dab78e, 0x3bc8ac99, 0x30c6a594, 0x599cd2df, 0x5292dbd2, 0x4f80c0c5, 0x448ec9c8, 0x75a4f6eb, 0x7eaaffe6, 0x63b8e4f1, 0x68b6edfc, 0xb10c0a67, 0xba02036a, 0xa710187d, 0xac1e1170, 0x9d342e53, 0x963a275e, 0x8b283c49, 0x80263544, 0xe97c420f, 0xe2724b02, 0xff605015, 0xf46e5918, 0xc544663b, 0xce4a6f36, 0xd3587421, 0xd8567d2c, 0x7a37a10c, 0x7139a801, 0x6c2bb316, 0x6725ba1b, 0x560f8538, 0x5d018c35, 0x40139722, 0x4b1d9e2f, 0x2247e964, 0x2949e069, 0x345bfb7e, 0x3f55f273, 0x0e7fcd50, 0x0571c45d, 0x1863df4a, 0x136dd647, 0xcad731dc, 0xc1d938d1, 0xdccb23c6, 0xd7c52acb, 0xe6ef15e8, 0xede11ce5, 0xf0f307f2, 0xfbfd0eff, 0x92a779b4, 0x99a970b9, 0x84bb6bae, 0x8fb562a3, 0xbe9f5d80, 0xb591548d, 0xa8834f9a, 0xa38d4697];
+           var U3 = [0x00000000, 0x0d0b0e09, 0x1a161c12, 0x171d121b, 0x342c3824, 0x3927362d, 0x2e3a2436, 0x23312a3f, 0x68587048, 0x65537e41, 0x724e6c5a, 0x7f456253, 0x5c74486c, 0x517f4665, 0x4662547e, 0x4b695a77, 0xd0b0e090, 0xddbbee99, 0xcaa6fc82, 0xc7adf28b, 0xe49cd8b4, 0xe997d6bd, 0xfe8ac4a6, 0xf381caaf, 0xb8e890d8, 0xb5e39ed1, 0xa2fe8cca, 0xaff582c3, 0x8cc4a8fc, 0x81cfa6f5, 0x96d2b4ee, 0x9bd9bae7, 0xbb7bdb3b, 0xb670d532, 0xa16dc729, 0xac66c920, 0x8f57e31f, 0x825ced16, 0x9541ff0d, 0x984af104, 0xd323ab73, 0xde28a57a, 0xc935b761, 0xc43eb968, 0xe70f9357, 0xea049d5e, 0xfd198f45, 0xf012814c, 0x6bcb3bab, 0x66c035a2, 0x71dd27b9, 0x7cd629b0, 0x5fe7038f, 0x52ec0d86, 0x45f11f9d, 0x48fa1194, 0x03934be3, 0x0e9845ea, 0x198557f1, 0x148e59f8, 0x37bf73c7, 0x3ab47dce, 0x2da96fd5, 0x20a261dc, 0x6df6ad76, 0x60fda37f, 0x77e0b164, 0x7aebbf6d, 0x59da9552, 0x54d19b5b, 0x43cc8940, 0x4ec78749, 0x05aedd3e, 0x08a5d337, 0x1fb8c12c, 0x12b3cf25, 0x3182e51a, 0x3c89eb13, 0x2b94f908, 0x269ff701, 0xbd464de6, 0xb04d43ef, 0xa75051f4, 0xaa5b5ffd, 0x896a75c2, 0x84617bcb, 0x937c69d0, 0x9e7767d9, 0xd51e3dae, 0xd81533a7, 0xcf0821bc, 0xc2032fb5, 0xe132058a, 0xec390b83, 0xfb241998, 0xf62f1791, 0xd68d764d, 0xdb867844, 0xcc9b6a5f, 0xc1906456, 0xe2a14e69, 0xefaa4060, 0xf8b7527b, 0xf5bc5c72, 0xbed50605, 0xb3de080c, 0xa4c31a17, 0xa9c8141e, 0x8af93e21, 0x87f23028, 0x90ef2233, 0x9de42c3a, 0x063d96dd, 0x0b3698d4, 0x1c2b8acf, 0x112084c6, 0x3211aef9, 0x3f1aa0f0, 0x2807b2eb, 0x250cbce2, 0x6e65e695, 0x636ee89c, 0x7473fa87, 0x7978f48e, 0x5a49deb1, 0x5742d0b8, 0x405fc2a3, 0x4d54ccaa, 0xdaf741ec, 0xd7fc4fe5, 0xc0e15dfe, 0xcdea53f7, 0xeedb79c8, 0xe3d077c1, 0xf4cd65da, 0xf9c66bd3, 0xb2af31a4, 0xbfa43fad, 0xa8b92db6, 0xa5b223bf, 0x86830980, 0x8b880789, 0x9c951592, 0x919e1b9b, 0x0a47a17c, 0x074caf75, 0x1051bd6e, 0x1d5ab367, 0x3e6b9958, 0x33609751, 0x247d854a, 0x29768b43, 0x621fd134, 0x6f14df3d, 0x7809cd26, 0x7502c32f, 0x5633e910, 0x5b38e719, 0x4c25f502, 0x412efb0b, 0x618c9ad7, 0x6c8794de, 0x7b9a86c5, 0x769188cc, 0x55a0a2f3, 0x58abacfa, 0x4fb6bee1, 0x42bdb0e8, 0x09d4ea9f, 0x04dfe496, 0x13c2f68d, 0x1ec9f884, 0x3df8d2bb, 0x30f3dcb2, 0x27eecea9, 0x2ae5c0a0, 0xb13c7a47, 0xbc37744e, 0xab2a6655, 0xa621685c, 0x85104263, 0x881b4c6a, 0x9f065e71, 0x920d5078, 0xd9640a0f, 0xd46f0406, 0xc372161d, 0xce791814, 0xed48322b, 0xe0433c22, 0xf75e2e39, 0xfa552030, 0xb701ec9a, 0xba0ae293, 0xad17f088, 0xa01cfe81, 0x832dd4be, 0x8e26dab7, 0x993bc8ac, 0x9430c6a5, 0xdf599cd2, 0xd25292db, 0xc54f80c0, 0xc8448ec9, 0xeb75a4f6, 0xe67eaaff, 0xf163b8e4, 0xfc68b6ed, 0x67b10c0a, 0x6aba0203, 0x7da71018, 0x70ac1e11, 0x539d342e, 0x5e963a27, 0x498b283c, 0x44802635, 0x0fe97c42, 0x02e2724b, 0x15ff6050, 0x18f46e59, 0x3bc54466, 0x36ce4a6f, 0x21d35874, 0x2cd8567d, 0x0c7a37a1, 0x017139a8, 0x166c2bb3, 0x1b6725ba, 0x38560f85, 0x355d018c, 0x22401397, 0x2f4b1d9e, 0x642247e9, 0x692949e0, 0x7e345bfb, 0x733f55f2, 0x500e7fcd, 0x5d0571c4, 0x4a1863df, 0x47136dd6, 0xdccad731, 0xd1c1d938, 0xc6dccb23, 0xcbd7c52a, 0xe8e6ef15, 0xe5ede11c, 0xf2f0f307, 0xfffbfd0e, 0xb492a779, 0xb999a970, 0xae84bb6b, 0xa38fb562, 0x80be9f5d, 0x8db59154, 0x9aa8834f, 0x97a38d46];
+           var U4 = [0x00000000, 0x090d0b0e, 0x121a161c, 0x1b171d12, 0x24342c38, 0x2d392736, 0x362e3a24, 0x3f23312a, 0x48685870, 0x4165537e, 0x5a724e6c, 0x537f4562, 0x6c5c7448, 0x65517f46, 0x7e466254, 0x774b695a, 0x90d0b0e0, 0x99ddbbee, 0x82caa6fc, 0x8bc7adf2, 0xb4e49cd8, 0xbde997d6, 0xa6fe8ac4, 0xaff381ca, 0xd8b8e890, 0xd1b5e39e, 0xcaa2fe8c, 0xc3aff582, 0xfc8cc4a8, 0xf581cfa6, 0xee96d2b4, 0xe79bd9ba, 0x3bbb7bdb, 0x32b670d5, 0x29a16dc7, 0x20ac66c9, 0x1f8f57e3, 0x16825ced, 0x0d9541ff, 0x04984af1, 0x73d323ab, 0x7ade28a5, 0x61c935b7, 0x68c43eb9, 0x57e70f93, 0x5eea049d, 0x45fd198f, 0x4cf01281, 0xab6bcb3b, 0xa266c035, 0xb971dd27, 0xb07cd629, 0x8f5fe703, 0x8652ec0d, 0x9d45f11f, 0x9448fa11, 0xe303934b, 0xea0e9845, 0xf1198557, 0xf8148e59, 0xc737bf73, 0xce3ab47d, 0xd52da96f, 0xdc20a261, 0x766df6ad, 0x7f60fda3, 0x6477e0b1, 0x6d7aebbf, 0x5259da95, 0x5b54d19b, 0x4043cc89, 0x494ec787, 0x3e05aedd, 0x3708a5d3, 0x2c1fb8c1, 0x2512b3cf, 0x1a3182e5, 0x133c89eb, 0x082b94f9, 0x01269ff7, 0xe6bd464d, 0xefb04d43, 0xf4a75051, 0xfdaa5b5f, 0xc2896a75, 0xcb84617b, 0xd0937c69, 0xd99e7767, 0xaed51e3d, 0xa7d81533, 0xbccf0821, 0xb5c2032f, 0x8ae13205, 0x83ec390b, 0x98fb2419, 0x91f62f17, 0x4dd68d76, 0x44db8678, 0x5fcc9b6a, 0x56c19064, 0x69e2a14e, 0x60efaa40, 0x7bf8b752, 0x72f5bc5c, 0x05bed506, 0x0cb3de08, 0x17a4c31a, 0x1ea9c814, 0x218af93e, 0x2887f230, 0x3390ef22, 0x3a9de42c, 0xdd063d96, 0xd40b3698, 0xcf1c2b8a, 0xc6112084, 0xf93211ae, 0xf03f1aa0, 0xeb2807b2, 0xe2250cbc, 0x956e65e6, 0x9c636ee8, 0x877473fa, 0x8e7978f4, 0xb15a49de, 0xb85742d0, 0xa3405fc2, 0xaa4d54cc, 0xecdaf741, 0xe5d7fc4f, 0xfec0e15d, 0xf7cdea53, 0xc8eedb79, 0xc1e3d077, 0xdaf4cd65, 0xd3f9c66b, 0xa4b2af31, 0xadbfa43f, 0xb6a8b92d, 0xbfa5b223, 0x80868309, 0x898b8807, 0x929c9515, 0x9b919e1b, 0x7c0a47a1, 0x75074caf, 0x6e1051bd, 0x671d5ab3, 0x583e6b99, 0x51336097, 0x4a247d85, 0x4329768b, 0x34621fd1, 0x3d6f14df, 0x267809cd, 0x2f7502c3, 0x105633e9, 0x195b38e7, 0x024c25f5, 0x0b412efb, 0xd7618c9a, 0xde6c8794, 0xc57b9a86, 0xcc769188, 0xf355a0a2, 0xfa58abac, 0xe14fb6be, 0xe842bdb0, 0x9f09d4ea, 0x9604dfe4, 0x8d13c2f6, 0x841ec9f8, 0xbb3df8d2, 0xb230f3dc, 0xa927eece, 0xa02ae5c0, 0x47b13c7a, 0x4ebc3774, 0x55ab2a66, 0x5ca62168, 0x63851042, 0x6a881b4c, 0x719f065e, 0x78920d50, 0x0fd9640a, 0x06d46f04, 0x1dc37216, 0x14ce7918, 0x2bed4832, 0x22e0433c, 0x39f75e2e, 0x30fa5520, 0x9ab701ec, 0x93ba0ae2, 0x88ad17f0, 0x81a01cfe, 0xbe832dd4, 0xb78e26da, 0xac993bc8, 0xa59430c6, 0xd2df599c, 0xdbd25292, 0xc0c54f80, 0xc9c8448e, 0xf6eb75a4, 0xffe67eaa, 0xe4f163b8, 0xedfc68b6, 0x0a67b10c, 0x036aba02, 0x187da710, 0x1170ac1e, 0x2e539d34, 0x275e963a, 0x3c498b28, 0x35448026, 0x420fe97c, 0x4b02e272, 0x5015ff60, 0x5918f46e, 0x663bc544, 0x6f36ce4a, 0x7421d358, 0x7d2cd856, 0xa10c7a37, 0xa8017139, 0xb3166c2b, 0xba1b6725, 0x8538560f, 0x8c355d01, 0x97224013, 0x9e2f4b1d, 0xe9642247, 0xe0692949, 0xfb7e345b, 0xf2733f55, 0xcd500e7f, 0xc45d0571, 0xdf4a1863, 0xd647136d, 0x31dccad7, 0x38d1c1d9, 0x23c6dccb, 0x2acbd7c5, 0x15e8e6ef, 0x1ce5ede1, 0x07f2f0f3, 0x0efffbfd, 0x79b492a7, 0x70b999a9, 0x6bae84bb, 0x62a38fb5, 0x5d80be9f, 0x548db591, 0x4f9aa883, 0x4697a38d];

 
 

-         Renderer.prototype.link = function link (href, title, text) {
-           href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
-           if (href === null) {
-             return text;
-           }
-           var out = '<a href="' + escape$3(href) + '"';
-           if (title) {
-             out += ' title="' + title + '"';
-           }
-           out += '>' + text + '</a>';
-           return out;
-         };
+           function convertToInt32(bytes) {
+             var result = [];

 
 

-         Renderer.prototype.image = function image (href, title, text) {
-           href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
-           if (href === null) {
-             return text;
-           }
+             for (var i = 0; i < bytes.length; i += 4) {
+               result.push(bytes[i] << 24 | bytes[i + 1] << 16 | bytes[i + 2] << 8 | bytes[i + 3]);
+             }

 
 

-           var out = '<img src="' + href + '" alt="' + text + '"';
-           if (title) {
-             out += ' title="' + title + '"';
+             return result;

            }
            }

-           out += this.options.xhtml ? '/>' : '>';
-           return out;
-         };
-
-         Renderer.prototype.text = function text (text$1) {
-           return text$1;
-         };

 
 

-         return Renderer;
-       }());
+           var AES = function AES(key) {
+             if (!(this instanceof AES)) {
+               throw Error('AES must be instanitated with `new`');
+             }

 
 

-       /**
-        * TextRenderer
-        * returns only the textual part of the token
-        */
-       var TextRenderer_1 = /*@__PURE__*/(function () {
-         function TextRenderer () {}
+             Object.defineProperty(this, 'key', {
+               value: coerceArray(key, true)
+             });

 
 

-         TextRenderer.prototype.strong = function strong (text) {
-           return text;
-         };
+             this._prepare();
+           };

 
 

-         TextRenderer.prototype.em = function em (text) {
-           return text;
-         };
+           AES.prototype._prepare = function () {
+             var rounds = numberOfRounds[this.key.length];

 
 

-         TextRenderer.prototype.codespan = function codespan (text) {
-           return text;
-         };
+             if (rounds == null) {
+               throw new Error('invalid key size (must be 16, 24 or 32 bytes)');
+             } // encryption round keys

 
 

-         TextRenderer.prototype.del = function del (text) {
-           return text;
-         };

 
 

-         TextRenderer.prototype.html = function html (text) {
-           return text;
-         };
+             this._Ke = []; // decryption round keys

 
 

-         TextRenderer.prototype.text = function text (text$1) {
-           return text$1;
-         };
+             this._Kd = [];

 
 

-         TextRenderer.prototype.link = function link (href, title, text) {
-           return '' + text;
-         };
+             for (var i = 0; i <= rounds; i++) {
+               this._Ke.push([0, 0, 0, 0]);

 
 

-         TextRenderer.prototype.image = function image (href, title, text) {
-           return '' + text;
-         };
+               this._Kd.push([0, 0, 0, 0]);
+             }

 
 

-         TextRenderer.prototype.br = function br () {
-           return '';
-         };
+             var roundKeyCount = (rounds + 1) * 4;
+             var KC = this.key.length / 4; // convert the key into ints

 
 

-         return TextRenderer;
-       }());
+             var tk = convertToInt32(this.key); // copy values into round key arrays

 
 

-       /**
-        * Slugger generates header id
-        */
-       var Slugger_1 = /*@__PURE__*/(function () {
-         function Slugger() {
-           this.seen = {};
-         }
+             var index;

 
 

-         /**
-          * Convert string to unique id
-          */
-         Slugger.prototype.slug = function slug (value) {
-           var slug = value
-             .toLowerCase()
-             .trim()
-             // remove html tags
-             .replace(/<[!\/a-z].*?>/ig, '')
-             // remove unwanted chars
-             .replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '')
-             .replace(/\s/g, '-');
-
-           if (this.seen.hasOwnProperty(slug)) {
-             var originalSlug = slug;
-             do {
-               this.seen[originalSlug]++;
-               slug = originalSlug + '-' + this.seen[originalSlug];
-             } while (this.seen.hasOwnProperty(slug));
-           }
-           this.seen[slug] = 0;
+             for (var i = 0; i < KC; i++) {
+               index = i >> 2;
+               this._Ke[index][i % 4] = tk[i];
+               this._Kd[rounds - index][i % 4] = tk[i];
+             } // key expansion (fips-197 section 5.2)

 
 

-           return slug;
-         };

 
 

-         return Slugger;
-       }());
+             var rconpointer = 0;
+             var t = KC,
+                 tt;

 
 

-       var defaults$4 = defaults.defaults;
-       var unescape$2 = helpers.unescape;
+             while (t < roundKeyCount) {
+               tt = tk[KC - 1];
+               tk[0] ^= S[tt >> 16 & 0xFF] << 24 ^ S[tt >> 8 & 0xFF] << 16 ^ S[tt & 0xFF] << 8 ^ S[tt >> 24 & 0xFF] ^ rcon[rconpointer] << 24;
+               rconpointer += 1; // key expansion (for non-256 bit)

 
 

-       /**
-        * Parsing & Compiling
-        */
-       var Parser_1 = /*@__PURE__*/(function () {
-         function Parser(options) {
-           this.options = options || defaults$4;
-           this.options.renderer = this.options.renderer || new Renderer_1();
-           this.renderer = this.options.renderer;
-           this.renderer.options = this.options;
-           this.textRenderer = new TextRenderer_1();
-           this.slugger = new Slugger_1();
-         }
+               if (KC != 8) {
+                 for (var i = 1; i < KC; i++) {
+                   tk[i] ^= tk[i - 1];
+                 } // key expansion for 256-bit keys is "slightly different" (fips-197)

 
 

-         /**
-          * Static Parse Method
-          */
-         Parser.parse = function parse (tokens, options) {
-           var parser = new Parser(options);
-           return parser.parse(tokens);
-         };
+               } else {
+                 for (var i = 1; i < KC / 2; i++) {
+                   tk[i] ^= tk[i - 1];
+                 }

 
 

-         /**
-          * Parse Loop
-          */
-         Parser.prototype.parse = function parse (tokens, top) {
-           if ( top === void 0 ) top = true;
+                 tt = tk[KC / 2 - 1];
+                 tk[KC / 2] ^= S[tt & 0xFF] ^ S[tt >> 8 & 0xFF] << 8 ^ S[tt >> 16 & 0xFF] << 16 ^ S[tt >> 24 & 0xFF] << 24;

 
 

-           var out = '',
-             i,
-             j,
-             k,
-             l2,
-             l3,
-             row,
-             cell,
-             header,
-             body,
-             token,
-             ordered,
-             start,
-             loose,
-             itemBody,
-             item,
-             checked,
-             task,
-             checkbox;
-
-           var l = tokens.length;
-           for (i = 0; i < l; i++) {
-             token = tokens[i];
-             switch (token.type) {
-               case 'space': {
-                 continue;
-               }
-               case 'hr': {
-                 out += this.renderer.hr();
-                 continue;
-               }
-               case 'heading': {
-                 out += this.renderer.heading(
-                   this.parseInline(token.tokens),
-                   token.depth,
-                   unescape$2(this.parseInline(token.tokens, this.textRenderer)),
-                   this.slugger);
-                 continue;
-               }
-               case 'code': {
-                 out += this.renderer.code(token.text,
-                   token.lang,
-                   token.escaped);
-                 continue;
-               }
-               case 'table': {
-                 header = '';
-
-                 // header
-                 cell = '';
-                 l2 = token.header.length;
-                 for (j = 0; j < l2; j++) {
-                   cell += this.renderer.tablecell(
-                     this.parseInline(token.tokens.header[j]),
-                     { header: true, align: token.align[j] }
-                   );
+                 for (var i = KC / 2 + 1; i < KC; i++) {
+                   tk[i] ^= tk[i - 1];

                  }
                  }

-                 header += this.renderer.tablerow(cell);
-
-                 body = '';
-                 l2 = token.cells.length;
-                 for (j = 0; j < l2; j++) {
-                   row = token.tokens.cells[j];
-
-                   cell = '';
-                   l3 = row.length;
-                   for (k = 0; k < l3; k++) {
-                     cell += this.renderer.tablecell(
-                       this.parseInline(row[k]),
-                       { header: false, align: token.align[k] }
-                     );
-                   }
+               } // copy values into round key arrays

 
 

-                   body += this.renderer.tablerow(cell);
-                 }
-                 out += this.renderer.table(header, body);
-                 continue;
-               }
-               case 'blockquote': {
-                 body = this.parse(token.tokens);
-                 out += this.renderer.blockquote(body);
-                 continue;
-               }
-               case 'list': {
-                 ordered = token.ordered;
-                 start = token.start;
-                 loose = token.loose;
-                 l2 = token.items.length;
-
-                 body = '';
-                 for (j = 0; j < l2; j++) {
-                   item = token.items[j];
-                   checked = item.checked;
-                   task = item.task;
-
-                   itemBody = '';
-                   if (item.task) {
-                     checkbox = this.renderer.checkbox(checked);
-                     if (loose) {
-                       if (item.tokens[0].type === 'text') {
-                         item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
-                         if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
-                           item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
-                         }
-                       } else {
-                         item.tokens.unshift({
-                           type: 'text',
-                           text: checkbox
-                         });
-                       }
-                     } else {
-                       itemBody += checkbox;
-                     }
-                   }

 
 

-                   itemBody += this.parse(item.tokens, loose);
-                   body += this.renderer.listitem(itemBody, task, checked);
-                 }
+               var i = 0,
+                   r,
+                   c;

 
 

-                 out += this.renderer.list(body, ordered, start);
-                 continue;
-               }
-               case 'html': {
-                 // TODO parse inline content if parameter markdown=1
-                 out += this.renderer.html(token.text);
-                 continue;
-               }
-               case 'paragraph': {
-                 out += this.renderer.paragraph(this.parseInline(token.tokens));
-                 continue;
-               }
-               case 'text': {
-                 body = token.tokens ? this.parseInline(token.tokens) : token.text;
-                 while (i + 1 < l && tokens[i + 1].type === 'text') {
-                   token = tokens[++i];
-                   body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
-                 }
-                 out += top ? this.renderer.paragraph(body) : body;
-                 continue;
+               while (i < KC && t < roundKeyCount) {
+                 r = t >> 2;
+                 c = t % 4;
+                 this._Ke[r][c] = tk[i];
+                 this._Kd[rounds - r][c] = tk[i++];
+                 t++;

                }
                }

-               default: {
-                 var errMsg = 'Token with "' + token.type + '" type was not found.';
-                 if (this.options.silent) {
-                   console.error(errMsg);
-                   return;
-                 } else {
-                   throw new Error(errMsg);
-                 }
+             } // inverse-cipher-ify the decryption round key (fips-197 section 5.3)
+
+
+             for (var r = 1; r < rounds; r++) {
+               for (var c = 0; c < 4; c++) {
+                 tt = this._Kd[r][c];
+                 this._Kd[r][c] = U1[tt >> 24 & 0xFF] ^ U2[tt >> 16 & 0xFF] ^ U3[tt >> 8 & 0xFF] ^ U4[tt & 0xFF];

                }
              }
                }
              }

-           }
+           };

 
 

-           return out;
-         };
+           AES.prototype.encrypt = function (plaintext) {
+             if (plaintext.length != 16) {
+               throw new Error('invalid plaintext size (must be 16 bytes)');
+             }

 
 

-         /**
-          * Parse Inline Tokens
-          */
-         Parser.prototype.parseInline = function parseInline (tokens, renderer) {
-           renderer = renderer || this.renderer;
-           var out = '',
-             i,
-             token;
+             var rounds = this._Ke.length - 1;
+             var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)

 
 

-           var l = tokens.length;
-           for (i = 0; i < l; i++) {
-             token = tokens[i];
-             switch (token.type) {
-               case 'escape': {
-                 out += renderer.text(token.text);
-                 break;
-               }
-               case 'html': {
-                 out += renderer.html(token.text);
-                 break;
-               }
-               case 'link': {
-                 out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
-                 break;
-               }
-               case 'image': {
-                 out += renderer.image(token.href, token.title, token.text);
-                 break;
-               }
-               case 'strong': {
-                 out += renderer.strong(this.parseInline(token.tokens, renderer));
-                 break;
-               }
-               case 'em': {
-                 out += renderer.em(this.parseInline(token.tokens, renderer));
-                 break;
-               }
-               case 'codespan': {
-                 out += renderer.codespan(token.text);
-                 break;
-               }
-               case 'br': {
-                 out += renderer.br();
-                 break;
-               }
-               case 'del': {
-                 out += renderer.del(this.parseInline(token.tokens, renderer));
-                 break;
-               }
-               case 'text': {
-                 out += renderer.text(token.text);
-                 break;
-               }
-               default: {
-                 var errMsg = 'Token with "' + token.type + '" type was not found.';
-                 if (this.options.silent) {
-                   console.error(errMsg);
-                   return;
-                 } else {
-                   throw new Error(errMsg);
-                 }
+             var t = convertToInt32(plaintext);
+
+             for (var i = 0; i < 4; i++) {
+               t[i] ^= this._Ke[0][i];
+             } // apply round transforms
+
+
+             for (var r = 1; r < rounds; r++) {
+               for (var i = 0; i < 4; i++) {
+                 a[i] = T1[t[i] >> 24 & 0xff] ^ T2[t[(i + 1) % 4] >> 16 & 0xff] ^ T3[t[(i + 2) % 4] >> 8 & 0xff] ^ T4[t[(i + 3) % 4] & 0xff] ^ this._Ke[r][i];

                }
                }

+
+               t = a.slice();
+             } // the last round is special
+
+
+             var result = createArray(16),
+                 tt;
+
+             for (var i = 0; i < 4; i++) {
+               tt = this._Ke[rounds][i];
+               result[4 * i] = (S[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
+               result[4 * i + 1] = (S[t[(i + 1) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
+               result[4 * i + 2] = (S[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
+               result[4 * i + 3] = (S[t[(i + 3) % 4] & 0xff] ^ tt) & 0xff;

              }
              }

-           }
-           return out;
-         };

 
 

-         return Parser;
-       }());
+             return result;
+           };

 
 

-       var merge$3 = helpers.merge;
-       var checkSanitizeDeprecation$1 = helpers.checkSanitizeDeprecation;
-       var escape$4 = helpers.escape;
-       var getDefaults = defaults.getDefaults;
-       var changeDefaults = defaults.changeDefaults;
-       var defaults$5 = defaults.defaults;
+           AES.prototype.decrypt = function (ciphertext) {
+             if (ciphertext.length != 16) {
+               throw new Error('invalid ciphertext size (must be 16 bytes)');
+             }

 
 

-       /**
-        * Marked
-        */
-       function marked(src, opt, callback) {
-         // throw error in case of non string input
-         if (typeof src === 'undefined' || src === null) {
-           throw new Error('marked(): input parameter is undefined or null');
-         }
-         if (typeof src !== 'string') {
-           throw new Error('marked(): input parameter is of type '
-             + Object.prototype.toString.call(src) + ', string expected');
-         }
+             var rounds = this._Kd.length - 1;
+             var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)

 
 

-         if (callback || typeof opt === 'function') {
-           if (!callback) {
-             callback = opt;
-             opt = null;
-           }
+             var t = convertToInt32(ciphertext);

 
 

-           opt = merge$3({}, marked.defaults, opt || {});
-           checkSanitizeDeprecation$1(opt);
-           var highlight = opt.highlight;
-           var tokens,
-             pending,
-             i = 0;
+             for (var i = 0; i < 4; i++) {
+               t[i] ^= this._Kd[0][i];
+             } // apply round transforms

 
 

-           try {
-             tokens = Lexer_1.lex(src, opt);
-           } catch (e) {
-             return callback(e);
-           }

 
 

-           pending = tokens.length;
+             for (var r = 1; r < rounds; r++) {
+               for (var i = 0; i < 4; i++) {
+                 a[i] = T5[t[i] >> 24 & 0xff] ^ T6[t[(i + 3) % 4] >> 16 & 0xff] ^ T7[t[(i + 2) % 4] >> 8 & 0xff] ^ T8[t[(i + 1) % 4] & 0xff] ^ this._Kd[r][i];
+               }

 
 

-           var done = function(err) {
-             if (err) {
-               opt.highlight = highlight;
-               return callback(err);
-             }
+               t = a.slice();
+             } // the last round is special

 
 

-             var out;

 
 

-             try {
-               out = Parser_1.parse(tokens, opt);
-             } catch (e) {
-               err = e;
-             }
+             var result = createArray(16),
+                 tt;

 
 

-             opt.highlight = highlight;
+             for (var i = 0; i < 4; i++) {
+               tt = this._Kd[rounds][i];
+               result[4 * i] = (Si[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
+               result[4 * i + 1] = (Si[t[(i + 3) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
+               result[4 * i + 2] = (Si[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
+               result[4 * i + 3] = (Si[t[(i + 1) % 4] & 0xff] ^ tt) & 0xff;
+             }

 
 

-             return err
-               ? callback(err)
-               : callback(null, out);
+             return result;

            };
            };

+           /**
+            *  Mode Of Operation - Electonic Codebook (ECB)
+            */

 
 

-           if (!highlight || highlight.length < 3) {
-             return done();
-           }

 
 

-           delete opt.highlight;
+           var ModeOfOperationECB = function ModeOfOperationECB(key) {
+             if (!(this instanceof ModeOfOperationECB)) {
+               throw Error('AES must be instanitated with `new`');
+             }

 
 

-           if (!pending) { return done(); }
+             this.description = "Electronic Code Block";
+             this.name = "ecb";
+             this._aes = new AES(key);
+           };

 
 

-           for (; i < tokens.length; i++) {
-             (function(token) {
-               if (token.type !== 'code') {
-                 return --pending || done();
-               }
-               return highlight(token.text, token.lang, function(err, code) {
-                 if (err) { return done(err); }
-                 if (code == null || code === token.text) {
-                   return --pending || done();
-                 }
-                 token.text = code;
-                 token.escaped = true;
-                 --pending || done();
-               });
-             })(tokens[i]);
-           }
+           ModeOfOperationECB.prototype.encrypt = function (plaintext) {
+             plaintext = coerceArray(plaintext);

 
 

-           return;
-         }
-         try {
-           opt = merge$3({}, marked.defaults, opt || {});
-           checkSanitizeDeprecation$1(opt);
-           return Parser_1.parse(Lexer_1.lex(src, opt), opt);
-         } catch (e$1) {
-           e$1.message += '\nPlease report this to https://github.com/markedjs/marked.';
-           if ((opt || marked.defaults).silent) {
-             return '<p>An error occurred:</p><pre>'
-               + escape$4(e$1.message + '', true)
-               + '</pre>';
-           }
-           throw e$1;
-         }
-       }
+             if (plaintext.length % 16 !== 0) {
+               throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
+             }

 
 

-       /**
-        * Options
-        */
+             var ciphertext = createArray(plaintext.length);
+             var block = createArray(16);

 
 

-       marked.options =
-       marked.setOptions = function(opt) {
-         merge$3(marked.defaults, opt);
-         changeDefaults(marked.defaults);
-         return marked;
-       };
+             for (var i = 0; i < plaintext.length; i += 16) {
+               copyArray(plaintext, block, 0, i, i + 16);
+               block = this._aes.encrypt(block);
+               copyArray(block, ciphertext, i);
+             }
+
+             return ciphertext;
+           };

 
 

-       marked.getDefaults = getDefaults;
+           ModeOfOperationECB.prototype.decrypt = function (ciphertext) {
+             ciphertext = coerceArray(ciphertext);

 
 

-       marked.defaults = defaults$5;
+             if (ciphertext.length % 16 !== 0) {
+               throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
+             }

 
 

-       /**
-        * Use Extension
-        */
+             var plaintext = createArray(ciphertext.length);
+             var block = createArray(16);

 
 

-       marked.use = function(extension) {
-         var opts = merge$3({}, extension);
-         if (extension.renderer) {
-           var renderer = marked.defaults.renderer || new Renderer_1();
-           var loop = function ( prop ) {
-             var prevRenderer = renderer[prop];
-             renderer[prop] = function () {
-               var args = [], len = arguments.length;
-               while ( len-- ) args[ len ] = arguments[ len ];
-
-               var ret = extension.renderer[prop].apply(renderer, args);
-               if (ret === false) {
-                 ret = prevRenderer.apply(renderer, args);
-               }
-               return ret;
-             };
-           };
+             for (var i = 0; i < ciphertext.length; i += 16) {
+               copyArray(ciphertext, block, 0, i, i + 16);
+               block = this._aes.decrypt(block);
+               copyArray(block, plaintext, i);
+             }

 
 

-           for (var prop in extension.renderer) loop( prop );
-           opts.renderer = renderer;
-         }
-         if (extension.tokenizer) {
-           var tokenizer = marked.defaults.tokenizer || new Tokenizer_1();
-           var loop$1 = function ( prop ) {
-             var prevTokenizer = tokenizer[prop$1];
-             tokenizer[prop$1] = function () {
-               var args = [], len = arguments.length;
-               while ( len-- ) args[ len ] = arguments[ len ];
-
-               var ret = extension.tokenizer[prop$1].apply(tokenizer, args);
-               if (ret === false) {
-                 ret = prevTokenizer.apply(tokenizer, args);
-               }
-               return ret;
-             };
+             return plaintext;

            };
            };

+           /**
+            *  Mode Of Operation - Cipher Block Chaining (CBC)
+            */

 
 

-           for (var prop$1 in extension.tokenizer) loop$1( prop );
-           opts.tokenizer = tokenizer;
-         }
-         marked.setOptions(opts);
-       };

 
 

-       /**
-        * Expose
-        */
+           var ModeOfOperationCBC = function ModeOfOperationCBC(key, iv) {
+             if (!(this instanceof ModeOfOperationCBC)) {
+               throw Error('AES must be instanitated with `new`');
+             }

 
 

-       marked.Parser = Parser_1;
-       marked.parser = Parser_1.parse;
+             this.description = "Cipher Block Chaining";
+             this.name = "cbc";

 
 

-       marked.Renderer = Renderer_1;
-       marked.TextRenderer = TextRenderer_1;
+             if (!iv) {
+               iv = createArray(16);
+             } else if (iv.length != 16) {
+               throw new Error('invalid initialation vector size (must be 16 bytes)');
+             }

 
 

-       marked.Lexer = Lexer_1;
-       marked.lexer = Lexer_1.lex;
+             this._lastCipherblock = coerceArray(iv, true);
+             this._aes = new AES(key);
+           };

 
 

-       marked.Tokenizer = Tokenizer_1;
+           ModeOfOperationCBC.prototype.encrypt = function (plaintext) {
+             plaintext = coerceArray(plaintext);

 
 

-       marked.Slugger = Slugger_1;
+             if (plaintext.length % 16 !== 0) {
+               throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
+             }

 
 

-       marked.parse = marked;
+             var ciphertext = createArray(plaintext.length);
+             var block = createArray(16);

 
 

-       var marked_1 = marked;
+             for (var i = 0; i < plaintext.length; i += 16) {
+               copyArray(plaintext, block, 0, i, i + 16);

 
 

-       var tiler$2 = utilTiler();
-       var dispatch$3 = dispatch('loaded');
-       var _tileZoom$2 = 14;
-       var _osmoseUrlRoot = 'https://osmose.openstreetmap.fr/api/0.3';
-       var _osmoseData = { icons: {}, items: [] };
+               for (var j = 0; j < 16; j++) {
+                 block[j] ^= this._lastCipherblock[j];
+               }

 
 

-       // This gets reassigned if reset
-       var _cache$2;
+               this._lastCipherblock = this._aes.encrypt(block);
+               copyArray(this._lastCipherblock, ciphertext, i);
+             }

 
 

-       function abortRequest$2(controller) {
-         if (controller) {
-           controller.abort();
-         }
-       }
+             return ciphertext;
+           };

 
 

-       function abortUnwantedRequests$2(cache, tiles) {
-         Object.keys(cache.inflightTile).forEach(function (k) {
-           var wanted = tiles.find(function (tile) { return k === tile.id; });
-           if (!wanted) {
-             abortRequest$2(cache.inflightTile[k]);
-             delete cache.inflightTile[k];
-           }
-         });
-       }
+           ModeOfOperationCBC.prototype.decrypt = function (ciphertext) {
+             ciphertext = coerceArray(ciphertext);

 
 

-       function encodeIssueRtree$2(d) {
-         return { minX: d.loc[0], minY: d.loc[1], maxX: d.loc[0], maxY: d.loc[1], data: d };
-       }
+             if (ciphertext.length % 16 !== 0) {
+               throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
+             }

 
 

-       // Replace or remove QAItem from rtree
-       function updateRtree$2(item, replace) {
-         _cache$2.rtree.remove(item, function (a, b) { return a.data.id === b.data.id; });
+             var plaintext = createArray(ciphertext.length);
+             var block = createArray(16);

 
 

-         if (replace) {
-           _cache$2.rtree.insert(item);
-         }
-       }
+             for (var i = 0; i < ciphertext.length; i += 16) {
+               copyArray(ciphertext, block, 0, i, i + 16);
+               block = this._aes.decrypt(block);

 
 

-       // Issues shouldn't obscure eachother
-       function preventCoincident$1(loc) {
-         var coincident = false;
-         do {
-           // first time, move marker up. after that, move marker right.
-           var delta = coincident ? [0.00001, 0] : [0, 0.00001];
-           loc = geoVecAdd(loc, delta);
-           var bbox = geoExtent(loc).bbox();
-           coincident = _cache$2.rtree.search(bbox).length;
-         } while (coincident);
+               for (var j = 0; j < 16; j++) {
+                 plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
+               }

 
 

-         return loc;
-       }
+               copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
+             }

 
 

-       var serviceOsmose = {
-         title: 'osmose',
+             return plaintext;
+           };
+           /**
+            *  Mode Of Operation - Cipher Feedback (CFB)
+            */

 
 

-         init: function init() {
-           _mainFileFetcher.get('qa_data')
-             .then(function (d) {
-               _osmoseData = d.osmose;
-               _osmoseData.items = Object.keys(d.osmose.icons)
-                 .map(function (s) { return s.split('-')[0]; })
-                 .reduce(function (unique, item) { return unique.indexOf(item) !== -1 ? unique : unique.concat( [item]); }, []);
-             });

 
 

-           if (!_cache$2) {
-             this.reset();
-           }
+           var ModeOfOperationCFB = function ModeOfOperationCFB(key, iv, segmentSize) {
+             if (!(this instanceof ModeOfOperationCFB)) {
+               throw Error('AES must be instanitated with `new`');
+             }

 
 

-           this.event = utilRebind(this, dispatch$3, 'on');
-         },
+             this.description = "Cipher Feedback";
+             this.name = "cfb";

 
 

-         reset: function reset() {
-           var _strings = {};
-           var _colors = {};
-           if (_cache$2) {
-             Object.values(_cache$2.inflightTile).forEach(abortRequest$2);
-             // Strings and colors are static and should not be re-populated
-             _strings = _cache$2.strings;
-             _colors = _cache$2.colors;
-           }
-           _cache$2 = {
-             data: {},
-             loadedTile: {},
-             inflightTile: {},
-             inflightPost: {},
-             closed: {},
-             rtree: new RBush(),
-             strings: _strings,
-             colors: _colors
-           };
-         },
+             if (!iv) {
+               iv = createArray(16);
+             } else if (iv.length != 16) {
+               throw new Error('invalid initialation vector size (must be 16 size)');
+             }

 
 

-         loadIssues: function loadIssues(projection) {
-           var this$1 = this;
+             if (!segmentSize) {
+               segmentSize = 1;
+             }

 
 

-           var params = {
-             // Tiles return a maximum # of issues
-             // So we want to filter our request for only types iD supports
-             item: _osmoseData.items
+             this.segmentSize = segmentSize;
+             this._shiftRegister = coerceArray(iv, true);
+             this._aes = new AES(key);

            };
 
            };
 

-           // determine the needed tiles to cover the view
-           var tiles = tiler$2
-             .zoomExtent([_tileZoom$2, _tileZoom$2])
-             .getTiles(projection);
+           ModeOfOperationCFB.prototype.encrypt = function (plaintext) {
+             if (plaintext.length % this.segmentSize != 0) {
+               throw new Error('invalid plaintext size (must be segmentSize bytes)');
+             }

 
 

-           // abort inflight requests that are no longer needed
-           abortUnwantedRequests$2(_cache$2, tiles);
+             var encrypted = coerceArray(plaintext, true);
+             var xorSegment;

 
 

-           // issue new requests..
-           tiles.forEach(function (tile) {
-             if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) { return; }
+             for (var i = 0; i < encrypted.length; i += this.segmentSize) {
+               xorSegment = this._aes.encrypt(this._shiftRegister);

 
 

-             var ref = tile.xyz;
-             var x = ref[0];
-             var y = ref[1];
-             var z = ref[2];
-             var url = _osmoseUrlRoot + "/issues/" + z + "/" + x + "/" + y + ".json?" + utilQsString(params);
+               for (var j = 0; j < this.segmentSize; j++) {
+                 encrypted[i + j] ^= xorSegment[j];
+               } // Shift the register

 
 

-             var controller = new AbortController();
-             _cache$2.inflightTile[tile.id] = controller;

 
 

-             d3_json(url, { signal: controller.signal })
-               .then(function (data) {
-                 delete _cache$2.inflightTile[tile.id];
-                 _cache$2.loadedTile[tile.id] = true;
-
-                 if (data.features) {
-                   data.features.forEach(function (issue) {
-                     var ref = issue.properties;
-                     var item = ref.item;
-                     var cl = ref.class;
-                     var id = ref.uuid;
-                     /* Osmose issues are uniquely identified by a unique
-                       `item` and `class` combination (both integer values) */
-                     var itemType = item + "-" + cl;
-
-                     // Filter out unsupported issue types (some are too specific or advanced)
-                     if (itemType in _osmoseData.icons) {
-                       var loc = issue.geometry.coordinates; // lon, lat
-                       loc = preventCoincident$1(loc);
-
-                       var d = new QAItem(loc, this$1, itemType, id, { item: item });
-
-                       // Setting elems here prevents UI detail requests
-                       if (item === 8300 || item === 8360) {
-                         d.elems = [];
-                       }
+               copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
+               copyArray(encrypted, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+             }

 
 

-                       _cache$2.data[d.id] = d;
-                       _cache$2.rtree.insert(encodeIssueRtree$2(d));
-                     }
-                   });
-                 }
+             return encrypted;
+           };

 
 

-                 dispatch$3.call('loaded');
-               })
-               .catch(function () {
-                 delete _cache$2.inflightTile[tile.id];
-                 _cache$2.loadedTile[tile.id] = true;
-               });
-           });
-         },
+           ModeOfOperationCFB.prototype.decrypt = function (ciphertext) {
+             if (ciphertext.length % this.segmentSize != 0) {
+               throw new Error('invalid ciphertext size (must be segmentSize bytes)');
+             }

 
 

-         loadIssueDetail: function loadIssueDetail(issue) {
-           var this$1 = this;
+             var plaintext = coerceArray(ciphertext, true);
+             var xorSegment;

 
 

-           // Issue details only need to be fetched once
-           if (issue.elems !== undefined) {
-             return Promise.resolve(issue);
-           }
+             for (var i = 0; i < plaintext.length; i += this.segmentSize) {
+               xorSegment = this._aes.encrypt(this._shiftRegister);

 
 

-           var url = _osmoseUrlRoot + "/issue/" + (issue.id) + "?langs=" + (_mainLocalizer.localeCode());
-           var cacheDetails = function (data) {
-             // Associated elements used for highlighting
-             // Assign directly for immediate use in the callback
-             issue.elems = data.elems.map(function (e) { return e.type.substring(0,1) + e.id; });
+               for (var j = 0; j < this.segmentSize; j++) {
+                 plaintext[i + j] ^= xorSegment[j];
+               } // Shift the register

 
 

-             // Some issues have instance specific detail in a subtitle
-             issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';

 
 

-             this$1.replaceItem(issue);
+               copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
+               copyArray(ciphertext, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+             }
+
+             return plaintext;

            };
            };

+           /**
+            *  Mode Of Operation - Output Feedback (OFB)
+            */

 
 

-           return d3_json(url).then(cacheDetails).then(function () { return issue; });
-         },

 
 

-         loadStrings: function loadStrings(locale) {
-           if ( locale === void 0 ) locale=_mainLocalizer.localeCode();
+           var ModeOfOperationOFB = function ModeOfOperationOFB(key, iv) {
+             if (!(this instanceof ModeOfOperationOFB)) {
+               throw Error('AES must be instanitated with `new`');
+             }

 
 

-           var items = Object.keys(_osmoseData.icons);
+             this.description = "Output Feedback";
+             this.name = "ofb";

 
 

-           if (
-             locale in _cache$2.strings
-             && Object.keys(_cache$2.strings[locale]).length === items.length
-           ) {
-               return Promise.resolve(_cache$2.strings[locale]);
-           }
+             if (!iv) {
+               iv = createArray(16);
+             } else if (iv.length != 16) {
+               throw new Error('invalid initialation vector size (must be 16 bytes)');
+             }

 
 

-           // May be partially populated already if some requests were successful
-           if (!(locale in _cache$2.strings)) {
-             _cache$2.strings[locale] = {};
-           }
+             this._lastPrecipher = coerceArray(iv, true);
+             this._lastPrecipherIndex = 16;
+             this._aes = new AES(key);
+           };

 
 

-           // Only need to cache strings for supported issue types
-           // Using multiple individual item + class requests to reduce fetched data size
-           var allRequests = items.map(function (itemType) {
-             // No need to request data we already have
-             if (itemType in _cache$2.strings[locale]) { return; }
+           ModeOfOperationOFB.prototype.encrypt = function (plaintext) {
+             var encrypted = coerceArray(plaintext, true);

 
 

-             var cacheData = function (data) {
-               // Bunch of nested single value arrays of objects
-               var ref = data.categories;
-               var cat = ref[0]; if ( cat === void 0 ) cat = {items:[]};
-               var ref$1 = cat.items;
-               var item = ref$1[0]; if ( item === void 0 ) item = {class:[]};
-               var ref$2 = item.class;
-               var cl = ref$2[0]; if ( cl === void 0 ) cl = null;
-
-               // If null default value is reached, data wasn't as expected (or was empty)
-               if (!cl) {
-                 /* eslint-disable no-console */
-                 console.log(("Osmose strings request (" + itemType + ") had unexpected data"));
-                 /* eslint-enable no-console */
-                 return;
+             for (var i = 0; i < encrypted.length; i++) {
+               if (this._lastPrecipherIndex === 16) {
+                 this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
+                 this._lastPrecipherIndex = 0;

                }
 
                }
 

-               // Cache served item colors to automatically style issue markers later
-               var itemInt = item.item;
-               var color = item.color;
-               if (/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/.test(color)) {
-                 _cache$2.colors[itemInt] = color;
-               }
+               encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
+             }

 
 

-               // Value of root key will be null if no string exists
-               // If string exists, value is an object with key 'auto' for string
-               var title = cl.title;
-               var detail = cl.detail;
-               var fix = cl.fix;
-               var trap = cl.trap;
+             return encrypted;
+           }; // Decryption is symetric

 
 

-               // Osmose titles shouldn't contain markdown
-               var issueStrings = {};
-               if (title) { issueStrings.title = title.auto; }
-               if (detail) { issueStrings.detail = marked_1(detail.auto); }
-               if (trap) { issueStrings.trap = marked_1(trap.auto); }
-               if (fix) { issueStrings.fix = marked_1(fix.auto); }

 
 

-               _cache$2.strings[locale][itemType] = issueStrings;
-             };
+           ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
+           /**
+            *  Counter object for CTR common mode of operation
+            */

 
 

-             var ref = itemType.split('-');
-             var item = ref[0];
-             var cl = ref[1];
+           var Counter = function Counter(initialValue) {
+             if (!(this instanceof Counter)) {
+               throw Error('Counter must be instanitated with `new`');
+             } // We allow 0, but anything false-ish uses the default 1

 
 

-             // Osmose API falls back to English strings where untranslated or if locale doesn't exist
-             var url = _osmoseUrlRoot + "/items/" + item + "/class/" + cl + "?langs=" + locale;

 
 

-             return d3_json(url).then(cacheData);
-           });
+             if (initialValue !== 0 && !initialValue) {
+               initialValue = 1;
+             }

 
 

-           return Promise.all(allRequests).then(function () { return _cache$2.strings[locale]; });
-         },
+             if (typeof initialValue === 'number') {
+               this._counter = createArray(16);
+               this.setValue(initialValue);
+             } else {
+               this.setBytes(initialValue);
+             }
+           };

 
 

-         getStrings: function getStrings(itemType, locale) {
-           if ( locale === void 0 ) locale=_mainLocalizer.localeCode();
+           Counter.prototype.setValue = function (value) {
+             if (typeof value !== 'number' || parseInt(value) != value) {
+               throw new Error('invalid counter value (must be an integer)');
+             } // We cannot safely handle numbers beyond the safe range for integers

 
 

-           // No need to fallback to English, Osmose API handles this for us
-           return (locale in _cache$2.strings) ? _cache$2.strings[locale][itemType] : {};
-         },

 
 

-         getColor: function getColor(itemType) {
-           return (itemType in _cache$2.colors) ? _cache$2.colors[itemType] : '#FFFFFF';
-         },
+             if (value > Number.MAX_SAFE_INTEGER) {
+               throw new Error('integer value out of safe range');
+             }

 
 

-         postUpdate: function postUpdate(issue, callback) {
-           var this$1 = this;
+             for (var index = 15; index >= 0; --index) {
+               this._counter[index] = value % 256;
+               value = parseInt(value / 256);
+             }
+           };

 
 

-           if (_cache$2.inflightPost[issue.id]) {
-             return callback({ message: 'Issue update already inflight', status: -2 }, issue);
-           }
+           Counter.prototype.setBytes = function (bytes) {
+             bytes = coerceArray(bytes, true);

 
 

-           // UI sets the status to either 'done' or 'false'
-           var url = _osmoseUrlRoot + "/issue/" + (issue.id) + "/" + (issue.newStatus);
-           var controller = new AbortController();
-           var after = function () {
-             delete _cache$2.inflightPost[issue.id];
+             if (bytes.length != 16) {
+               throw new Error('invalid counter bytes size (must be 16 bytes)');
+             }

 
 

-             this$1.removeItem(issue);
-             if (issue.newStatus === 'done') {
-               // Keep track of the number of issues closed per `item` to tag the changeset
-               if (!(issue.item in _cache$2.closed)) {
-                 _cache$2.closed[issue.item] = 0;
+             this._counter = bytes;
+           };
+
+           Counter.prototype.increment = function () {
+             for (var i = 15; i >= 0; i--) {
+               if (this._counter[i] === 255) {
+                 this._counter[i] = 0;
+               } else {
+                 this._counter[i]++;
+                 break;

                }
                }

-               _cache$2.closed[issue.item] += 1;

              }
              }

-             if (callback) { callback(null, issue); }

            };
            };

+           /**
+            *  Mode Of Operation - Counter (CTR)
+            */

 
 

-           _cache$2.inflightPost[issue.id] = controller;
-
-           fetch(url, { signal: controller.signal })
-             .then(after)
-             .catch(function (err) {
-               delete _cache$2.inflightPost[issue.id];
-               if (callback) { callback(err.message); }
-             });
-         },

 
 

-         // Get all cached QAItems covering the viewport
-         getItems: function getItems(projection) {
-           var viewport = projection.clipExtent();
-           var min = [viewport[0][0], viewport[1][1]];
-           var max = [viewport[1][0], viewport[0][1]];
-           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           var ModeOfOperationCTR = function ModeOfOperationCTR(key, counter) {
+             if (!(this instanceof ModeOfOperationCTR)) {
+               throw Error('AES must be instanitated with `new`');
+             }

 
 

-           return _cache$2.rtree.search(bbox).map(function (d) { return d.data; });
-         },
+             this.description = "Counter";
+             this.name = "ctr";

 
 

-         // Get a QAItem from cache
-         // NOTE: Don't change method name until UI v3 is merged
-         getError: function getError(id) {
-           return _cache$2.data[id];
-         },
+             if (!(counter instanceof Counter)) {
+               counter = new Counter(counter);
+             }

 
 

-         // get the name of the icon to display for this item
-         getIcon: function getIcon(itemType) {
-           return _osmoseData.icons[itemType];
-         },
+             this._counter = counter;
+             this._remainingCounter = null;
+             this._remainingCounterIndex = 16;
+             this._aes = new AES(key);
+           };

 
 

-         // Replace a single QAItem in the cache
-         replaceItem: function replaceItem(item) {
-           if (!(item instanceof QAItem) || !item.id) { return; }
+           ModeOfOperationCTR.prototype.encrypt = function (plaintext) {
+             var encrypted = coerceArray(plaintext, true);

 
 

-           _cache$2.data[item.id] = item;
-           updateRtree$2(encodeIssueRtree$2(item), true); // true = replace
-           return item;
-         },
+             for (var i = 0; i < encrypted.length; i++) {
+               if (this._remainingCounterIndex === 16) {
+                 this._remainingCounter = this._aes.encrypt(this._counter._counter);
+                 this._remainingCounterIndex = 0;

 
 

-         // Remove a single QAItem from the cache
-         removeItem: function removeItem(item) {
-           if (!(item instanceof QAItem) || !item.id) { return; }
+                 this._counter.increment();
+               }

 
 

-           delete _cache$2.data[item.id];
-           updateRtree$2(encodeIssueRtree$2(item), false); // false = remove
-         },
+               encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
+             }

 
 

-         // Used to populate `closed:osmose:*` changeset tags
-         getClosedCounts: function getClosedCounts() {
-           return _cache$2.closed;
-         },
+             return encrypted;
+           }; // Decryption is symetric

 
 

-         itemURL: function itemURL(item) {
-           return ("https://osmose.openstreetmap.fr/en/error/" + (item.id));
-         }
-       };

 
 

-       /*
-           A standalone SVG element that contains only a `defs` sub-element. To be
-           used once globally, since defs IDs must be unique within a document.
-       */
-       function svgDefs(context) {
+           ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt; ///////////////////////
+           // Padding
+           // See:https://tools.ietf.org/html/rfc2315

 
 

-           function drawDefs(selection) {
-               var defs = selection.append('defs');
-
-               // add markers
-               defs
-                   .append('marker')
-                   .attr('id', 'ideditor-oneway-marker')
-                   .attr('viewBox', '0 0 10 5')
-                   .attr('refX', 2.5)
-                   .attr('refY', 2.5)
-                   .attr('markerWidth', 2)
-                   .attr('markerHeight', 2)
-                   .attr('markerUnits', 'strokeWidth')
-                   .attr('orient', 'auto')
-                   .append('path')
-                   .attr('class', 'oneway-marker-path')
-                   .attr('d', 'M 5,3 L 0,3 L 0,2 L 5,2 L 5,0 L 10,2.5 L 5,5 z')
-                   .attr('stroke', 'none')
-                   .attr('fill', '#000')
-                   .attr('opacity', '0.75');
-
-               // SVG markers have to be given a colour where they're defined
-               // (they can't inherit it from the line they're attached to),
-               // so we need to manually define markers for each color of tag
-               // (also, it's slightly nicer if we can control the
-               // positioning for different tags)
-               function addSidedMarker(name, color, offset) {
-                   defs
-                       .append('marker')
-                       .attr('id', 'ideditor-sided-marker-' + name)
-                       .attr('viewBox', '0 0 2 2')
-                       .attr('refX', 1)
-                       .attr('refY', -offset)
-                       .attr('markerWidth', 1.5)
-                       .attr('markerHeight', 1.5)
-                       .attr('markerUnits', 'strokeWidth')
-                       .attr('orient', 'auto')
-                       .append('path')
-                       .attr('class', 'sided-marker-path sided-marker-' + name + '-path')
-                       .attr('d', 'M 0,0 L 1,1 L 2,0 z')
-                       .attr('stroke', 'none')
-                       .attr('fill', color);
-               }
-               addSidedMarker('natural', 'rgb(170, 170, 170)', 0);
-               // for a coastline, the arrows are (somewhat unintuitively) on
-               // the water side, so let's color them blue (with a gap) to
-               // give a stronger indication
-               addSidedMarker('coastline', '#77dede', 1);
-               addSidedMarker('waterway', '#77dede', 1);
-               // barriers have a dashed line, and separating the triangle
-               // from the line visually suits that
-               addSidedMarker('barrier', '#ddd', 1);
-               addSidedMarker('man_made', '#fff', 0);
-
-               defs
-                   .append('marker')
-                   .attr('id', 'ideditor-viewfield-marker')
-                   .attr('viewBox', '0 0 16 16')
-                   .attr('refX', 8)
-                   .attr('refY', 16)
-                   .attr('markerWidth', 4)
-                   .attr('markerHeight', 4)
-                   .attr('markerUnits', 'strokeWidth')
-                   .attr('orient', 'auto')
-                   .append('path')
-                   .attr('class', 'viewfield-marker-path')
-                   .attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z')
-                   .attr('fill', '#333')
-                   .attr('fill-opacity', '0.75')
-                   .attr('stroke', '#fff')
-                   .attr('stroke-width', '0.5px')
-                   .attr('stroke-opacity', '0.75');
-
-               defs
-                   .append('marker')
-                   .attr('id', 'ideditor-viewfield-marker-wireframe')
-                   .attr('viewBox', '0 0 16 16')
-                   .attr('refX', 8)
-                   .attr('refY', 16)
-                   .attr('markerWidth', 4)
-                   .attr('markerHeight', 4)
-                   .attr('markerUnits', 'strokeWidth')
-                   .attr('orient', 'auto')
-                   .append('path')
-                   .attr('class', 'viewfield-marker-path')
-                   .attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z')
-                   .attr('fill', 'none')
-                   .attr('stroke', '#fff')
-                   .attr('stroke-width', '0.5px')
-                   .attr('stroke-opacity', '0.75');
-
-               // add patterns
-               var patterns = defs.selectAll('pattern')
-                   .data([
-                       // pattern name, pattern image name
-                       ['beach', 'dots'],
-                       ['construction', 'construction'],
-                       ['cemetery', 'cemetery'],
-                       ['cemetery_christian', 'cemetery_christian'],
-                       ['cemetery_buddhist', 'cemetery_buddhist'],
-                       ['cemetery_muslim', 'cemetery_muslim'],
-                       ['cemetery_jewish', 'cemetery_jewish'],
-                       ['farmland', 'farmland'],
-                       ['farmyard', 'farmyard'],
-                       ['forest', 'forest'],
-                       ['forest_broadleaved', 'forest_broadleaved'],
-                       ['forest_needleleaved', 'forest_needleleaved'],
-                       ['forest_leafless', 'forest_leafless'],
-                       ['golf_green', 'grass'],
-                       ['grass', 'grass'],
-                       ['landfill', 'landfill'],
-                       ['meadow', 'grass'],
-                       ['orchard', 'orchard'],
-                       ['pond', 'pond'],
-                       ['quarry', 'quarry'],
-                       ['scrub', 'bushes'],
-                       ['vineyard', 'vineyard'],
-                       ['water_standing', 'lines'],
-                       ['waves', 'waves'],
-                       ['wetland', 'wetland'],
-                       ['wetland_marsh', 'wetland_marsh'],
-                       ['wetland_swamp', 'wetland_swamp'],
-                       ['wetland_bog', 'wetland_bog'],
-                       ['wetland_reedbed', 'wetland_reedbed']
-                   ])
-                   .enter()
-                   .append('pattern')
-                   .attr('id', function (d) { return 'ideditor-pattern-' + d[0]; })
-                   .attr('width', 32)
-                   .attr('height', 32)
-                   .attr('patternUnits', 'userSpaceOnUse');
-
-               patterns
-                   .append('rect')
-                   .attr('x', 0)
-                   .attr('y', 0)
-                   .attr('width', 32)
-                   .attr('height', 32)
-                   .attr('class', function (d) { return 'pattern-color-' + d[0]; });
-
-               patterns
-                   .append('image')
-                   .attr('x', 0)
-                   .attr('y', 0)
-                   .attr('width', 32)
-                   .attr('height', 32)
-                   .attr('xlink:href', function (d) {
-                       return context.imagePath('pattern/' + d[1] + '.png');
-                   });
+           function pkcs7pad(data) {
+             data = coerceArray(data, true);
+             var padder = 16 - data.length % 16;
+             var result = createArray(data.length + padder);
+             copyArray(data, result);

 
 

-               // add clip paths
-               defs.selectAll('clipPath')
-                   .data([12, 18, 20, 32, 45])
-                   .enter()
-                   .append('clipPath')
-                   .attr('id', function (d) { return 'ideditor-clip-square-' + d; })
-                   .append('rect')
-                   .attr('x', 0)
-                   .attr('y', 0)
-                   .attr('width', function (d) { return d; })
-                   .attr('height', function (d) { return d; });
+             for (var i = data.length; i < result.length; i++) {
+               result[i] = padder;
+             }

 
 

-               // add symbol spritesheets
-               defs
-                   .call(drawDefs.addSprites, [
-                       'iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'tnp-sprite', 'community-sprite'
-                   ], true);
+             return result;

            }
 
            }
 

+           function pkcs7strip(data) {
+             data = coerceArray(data, true);

 
 

-           drawDefs.addSprites = function(selection, ids, overrideColors) {
-               var spritesheets = selection.selectAll('.spritesheet');
-               var currData = spritesheets.data();
-               var data = utilArrayUniq(currData.concat(ids));
+             if (data.length < 16) {
+               throw new Error('PKCS#7 invalid length');
+             }

 
 

-               spritesheets
-                   .data(data)
-                   .enter()
-                   .append('g')
-                   .attr('class', function(d) { return 'spritesheet spritesheet-' + d; })
-                   .each(function(d) {
-                       var url = context.imagePath(d + '.svg');
-                       var node = select(this).node();
-
-                       svg(url)
-                           .then(function(svg) {
-                               node.appendChild(
-                                   select(svg.documentElement).attr('id', 'ideditor-' + d).node()
-                               );
-                               if (overrideColors && d !== 'iD-sprite') {   // allow icon colors to be overridden..
-                                   select(node).selectAll('path')
-                                       .attr('fill', 'currentColor');
-                               }
-                           })
-                           .catch(function() {
-                               /* ignore */
-                           });
-                   });
-           };
+             var padder = data[data.length - 1];

 
 

+             if (padder > 16) {
+               throw new Error('PKCS#7 padding byte out of range');
+             }

 
 

-           return drawDefs;
-       }
-
-       /* global Mapillary:false */
-
-
-       var apibase = 'https://a.mapillary.com/v3/';
-       var viewercss = 'mapillary-js/mapillary.min.css';
-       var viewerjs = 'mapillary-js/mapillary.min.js';
-       var clientId = 'NzNRM2otQkR2SHJzaXJmNmdQWVQ0dzo1ZWYyMmYwNjdmNDdlNmVi';
-       var mapFeatureConfig = {
-           values: [
-               'construction--flat--crosswalk-plain',
-               'marking--discrete--crosswalk-zebra',
-               'object--banner',
-               'object--bench',
-               'object--bike-rack',
-               'object--billboard',
-               'object--catch-basin',
-               'object--cctv-camera',
-               'object--fire-hydrant',
-               'object--mailbox',
-               'object--manhole',
-               'object--phone-booth',
-               'object--sign--advertisement',
-               'object--sign--information',
-               'object--sign--store',
-               'object--street-light',
-               'object--support--utility-pole',
-               'object--traffic-light--*',
-               'object--traffic-light--pedestrians',
-               'object--trash-can'
-           ].join(',')
-       };
-       var maxResults = 1000;
-       var tileZoom = 14;
-       var tiler$3 = utilTiler().zoomExtent([tileZoom, tileZoom]).skipNullIsland(true);
-       var dispatch$4 = dispatch('loadedImages', 'loadedSigns', 'loadedMapFeatures', 'bearingChanged');
-       var _mlyFallback = false;
-       var _mlyCache;
-       var _mlyClicks;
-       var _mlySelectedImageKey;
-       var _mlyViewer;
+             var length = data.length - padder;

 
 

+             for (var i = 0; i < padder; i++) {
+               if (data[length + i] !== padder) {
+                 throw new Error('PKCS#7 invalid padding byte');
+               }
+             }

 
 

-       function abortRequest$3(controller) {
-           controller.abort();
-       }
+             var result = createArray(length);
+             copyArray(data, result, 0, 0, length);
+             return result;
+           } ///////////////////////
+           // Exporting
+           // The block cipher

 
 
 
 

-       function maxPageAtZoom(z) {
-           if (z < 15)   { return 2; }
-           if (z === 15) { return 5; }
-           if (z === 16) { return 10; }
-           if (z === 17) { return 20; }
-           if (z === 18) { return 40; }
-           if (z > 18)   { return 80; }
-       }
+           var aesjs = {
+             AES: AES,
+             Counter: Counter,
+             ModeOfOperation: {
+               ecb: ModeOfOperationECB,
+               cbc: ModeOfOperationCBC,
+               cfb: ModeOfOperationCFB,
+               ofb: ModeOfOperationOFB,
+               ctr: ModeOfOperationCTR
+             },
+             utils: {
+               hex: convertHex,
+               utf8: convertUtf8
+             },
+             padding: {
+               pkcs7: {
+                 pad: pkcs7pad,
+                 strip: pkcs7strip
+               }
+             },
+             _arrayTest: {
+               coerceArray: coerceArray,
+               createArray: createArray,
+               copyArray: copyArray
+             }
+           }; // node.js

 
 

+           {
+             module.exports = aesjs; // RequireJS/AMD
+             // http://www.requirejs.org/docs/api.html
+             // https://github.com/amdjs/amdjs-api/wiki/AMD
+           }
+         })();
+       })(aesJs);

 
 

-       function loadTiles(which, url, projection) {
-           var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
-           var tiles = tiler$3.getTiles(projection);
+       var aesjs = aesJs.exports;

 
 

-           // abort inflight requests that are no longer needed
-           var cache = _mlyCache[which];
-           Object.keys(cache.inflight).forEach(function(k) {
-               var wanted = tiles.find(function(tile) { return k.indexOf(tile.id + ',') === 0; });
-               if (!wanted) {
-                   abortRequest$3(cache.inflight[k]);
-                   delete cache.inflight[k];
-               }
-           });
+       // We can use keys that are 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes).
+       // To generate a random key:  window.crypto.getRandomValues(new Uint8Array(16));
+       // This default signing key is built into iD and can be used to mask/unmask sensitive values.

 
 

-           tiles.forEach(function(tile) {
-               loadNextTilePage(which, currZoom, url, tile);
-           });
+       var DEFAULT_128 = [250, 157, 60, 79, 142, 134, 229, 129, 138, 126, 210, 129, 29, 71, 160, 208];
+       function utilAesEncrypt(text, key) {
+         key = key || DEFAULT_128;
+         var textBytes = aesjs.utils.utf8.toBytes(text);
+         var aesCtr = new aesjs.ModeOfOperation.ctr(key);
+         var encryptedBytes = aesCtr.encrypt(textBytes);
+         var encryptedHex = aesjs.utils.hex.fromBytes(encryptedBytes);
+         return encryptedHex;
+       }
+       function utilAesDecrypt(encryptedHex, key) {
+         key = key || DEFAULT_128;
+         var encryptedBytes = aesjs.utils.hex.toBytes(encryptedHex);
+         var aesCtr = new aesjs.ModeOfOperation.ctr(key);
+         var decryptedBytes = aesCtr.decrypt(encryptedBytes);
+         var text = aesjs.utils.utf8.fromBytes(decryptedBytes);
+         return text;

        }
 
        }
 

+       function utilCleanTags(tags) {
+         var out = {};

 
 

-       function loadNextTilePage(which, currZoom, url, tile) {
-           var cache = _mlyCache[which];
-           var rect = tile.extent.rectangle();
-           var maxPages = maxPageAtZoom(currZoom);
-           var nextPage = cache.nextPage[tile.id] || 0;
-           var nextURL = cache.nextURL[tile.id] || url +
-               utilQsString({
-                   per_page: maxResults,
-                   page: nextPage,
-                   client_id: clientId,
-                   bbox: [rect[0], rect[1], rect[2], rect[3]].join(','),
-               });
+         for (var k in tags) {
+           if (!k) continue;
+           var v = tags[k];

 
 

-           if (nextPage > maxPages) { return; }
+           if (v !== undefined) {
+             out[k] = cleanValue(k, v);
+           }
+         }

 
 

-           var id = tile.id + ',' + String(nextPage);
-           if (cache.loaded[id] || cache.inflight[id]) { return; }
+         return out;

 
 

-           var controller = new AbortController();
-           cache.inflight[id] = controller;
+         function cleanValue(k, v) {
+           function keepSpaces(k) {
+             return /_hours|_times|:conditional$/.test(k);
+           }

 
 

-           var options = {
-               method: 'GET',
-               signal: controller.signal,
-               headers: { 'Content-Type': 'application/json' }
-           };
+           function skip(k) {
+             return /^(description|note|fixme)$/.test(k);
+           }

 
 

-           fetch(nextURL, options)
-               .then(function(response) {
-                   if (!response.ok) {
-                       throw new Error(response.status + ' ' + response.statusText);
-                   }
-                   var linkHeader = response.headers.get('Link');
-                   if (linkHeader) {
-                       var pagination = parsePagination(linkHeader);
-                       if (pagination.next) {
-                           cache.nextURL[tile.id] = pagination.next;
-                       }
-                   }
-                   return response.json();
-               })
-               .then(function(data) {
-                   cache.loaded[id] = true;
-                   delete cache.inflight[id];
-                   if (!data || !data.features || !data.features.length) {
-                       throw new Error('No Data');
-                   }
+           if (skip(k)) return v;
+           var cleaned = v.split(';').map(function (s) {
+             return s.trim();
+           }).join(keepSpaces(k) ? '; ' : ';'); // The code below is not intended to validate websites and emails.
+           // It is only intended to prevent obvious copy-paste errors. (#2323)
+           // clean website- and email-like tags

 
 

-                   var features = data.features.map(function(feature) {
-                       var loc = feature.geometry.coordinates;
-                       var d;
-
-                       // An image (shown as a green dot on the map) is a single street photo with extra
-                       // information such as location, camera angle (CA), camera model, and so on.
-                       // Each image feature is a GeoJSON Point
-                       if (which === 'images') {
-                           d = {
-                               loc: loc,
-                               key: feature.properties.key,
-                               ca: feature.properties.ca,
-                               captured_at: feature.properties.captured_at,
-                               captured_by: feature.properties.username,
-                               pano: feature.properties.pano
-                           };
-
-                           cache.forImageKey[d.key] = d;     // cache imageKey -> image
-
-                       // Mapillary organizes images as sequences. A sequence of images are continuously captured
-                       // by a user at a give time. Sequences are shown on the map as green lines.
-                       // Each sequence feature is a GeoJSON LineString
-                       } else if (which === 'sequences') {
-                           var sequenceKey = feature.properties.key;
-                           cache.lineString[sequenceKey] = feature;           // cache sequenceKey -> lineString
-                           feature.properties.coordinateProperties.image_keys.forEach(function(imageKey) {
-                               cache.forImageKey[imageKey] = sequenceKey;     // cache imageKey -> sequenceKey
-                           });
-                           return false;    // because no `d` data worth loading into an rbush
-
-                       // An image detection is a semantic pixel area on an image. The area could indicate
-                       // sky, trees, sidewalk in the image. A detection can be a polygon, a bounding box, or a point.
-                       // Each image_detection feature is a GeoJSON Point (located where the image was taken)
-                       } else if (which === 'image_detections') {
-                           d = {
-                               key: feature.properties.key,
-                               image_key: feature.properties.image_key,
-                               value: feature.properties.value,
-                               package: feature.properties.package,
-                               shape: feature.properties.shape
-                           };
-
-                           // cache imageKey -> image_detections
-                           if (!cache.forImageKey[d.image_key]) {
-                               cache.forImageKey[d.image_key] = [];
-                           }
-                           cache.forImageKey[d.image_key].push(d);
-                           return false;    // because no `d` data worth loading into an rbush
-
-
-                       // A map feature is a real world object that can be shown on a map. It could be any object
-                       // recognized from images, manually added in images, or added on the map.
-                       // Each map feature is a GeoJSON Point (located where the feature is)
-                       } else if (which === 'map_features' || which === 'points') {
-                           d = {
-                               loc: loc,
-                               key: feature.properties.key,
-                               value: feature.properties.value,
-                               package: feature.properties.package,
-                               detections: feature.properties.detections
-                           };
-                       }
+           if (k.indexOf('website') !== -1 || k.indexOf('email') !== -1 || cleaned.indexOf('http') === 0) {
+             cleaned = cleaned.replace(/[\u200B-\u200F\uFEFF]/g, ''); // strip LRM and other zero width chars
+           }

 
 

-                       return {
-                           minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-                       };
+           return cleaned;
+         }
+       }

 
 

-                   }).filter(Boolean);
+       var _detected;

 
 

-                   if (cache.rtree && features) {
-                       cache.rtree.load(features);
-                   }
+       function utilDetect(refresh) {
+         if (_detected && !refresh) return _detected;
+         _detected = {};
+         var ua = navigator.userAgent;
+         var m = null;
+         /* Browser */

 
 

-                   if (data.features.length === maxResults) {  // more pages to load
-                       cache.nextPage[tile.id] = nextPage + 1;
-                       loadNextTilePage(which, currZoom, url, tile);
-                   } else {
-                       cache.nextPage[tile.id] = Infinity;     // no more pages to load
-                   }
+         m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i); // Edge

 
 

-                   if (which === 'images' || which === 'sequences') {
-                       dispatch$4.call('loadedImages');
-                   } else if (which === 'map_features') {
-                       dispatch$4.call('loadedSigns');
-                   } else if (which === 'points') {
-                       dispatch$4.call('loadedMapFeatures');
-                   }
-               })
-               .catch(function() {
-                   cache.loaded[id] = true;
-                   delete cache.inflight[id];
-               });
-       }
+         if (m !== null) {
+           _detected.browser = m[1];
+           _detected.version = m[2];
+         }

 
 

-       // extract links to pages of API results
-       function parsePagination(links) {
-           return links.split(',').map(function(rel) {
-               var elements = rel.split(';');
-               if (elements.length === 2) {
-                   return [
-                       /<(.+)>/.exec(elements[0])[1],
-                       /rel="(.+)"/.exec(elements[1])[1]
-                   ];
-               } else {
-                   return ['',''];
-               }
-           }).reduce(function(pagination, val) {
-               pagination[val[1]] = val[0];
-               return pagination;
-           }, {});
-       }
+         if (!_detected.browser) {
+           m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i); // IE11

 
 

+           if (m !== null) {
+             _detected.browser = 'msie';
+             _detected.version = m[1];
+           }
+         }

 
 

-       // partition viewport into higher zoom tiles
-       function partitionViewport(projection) {
-           var z = geoScaleToZoom(projection.scale());
-           var z2 = (Math.ceil(z * 2) / 2) + 2.5;   // round to next 0.5 and add 2.5
-           var tiler = utilTiler().zoomExtent([z2, z2]);
+         if (!_detected.browser) {
+           m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i); // Opera 15+

 
 

-           return tiler.getTiles(projection)
-               .map(function(tile) { return tile.extent; });
-       }
+           if (m !== null) {
+             _detected.browser = 'Opera';
+             _detected.version = m[2];
+           }
+         }

 
 

+         if (!_detected.browser) {
+           m = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);

 
 

-       // no more than `limit` results per partition.
-       function searchLimited(limit, projection, rtree) {
-           limit = limit || 5;
+           if (m !== null) {
+             _detected.browser = m[1];
+             _detected.version = m[2];
+             m = ua.match(/version\/([\.\d]+)/i);
+             if (m !== null) _detected.version = m[1];
+           }
+         }

 
 

-           return partitionViewport(projection)
-               .reduce(function(result, extent) {
-                   var found = rtree.search(extent.bbox())
-                       .slice(0, limit)
-                       .map(function(d) { return d.data; });
+         if (!_detected.browser) {
+           _detected.browser = navigator.appName;
+           _detected.version = navigator.appVersion;
+         } // keep major.minor version only..

 
 

-                   return (found.length ? result.concat(found) : result);
-               }, []);
-       }

 
 

+         _detected.version = _detected.version.split(/\W/).slice(0, 2).join('.'); // detect other browser capabilities
+         // Legacy Opera has incomplete svg style support. See #715

 
 

+         _detected.opera = _detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15;

 
 

-       var serviceMapillary = {
+         if (_detected.browser.toLowerCase() === 'msie') {
+           _detected.ie = true;
+           _detected.browser = 'Internet Explorer';
+           _detected.support = parseFloat(_detected.version) >= 11;
+         } else {
+           _detected.ie = false;
+           _detected.support = true;
+         }

 
 

-           init: function() {
-               if (!_mlyCache) {
-                   this.reset();
-               }
+         _detected.filedrop = window.FileReader && 'ondrop' in window;
+         _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+         _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+         /* Platform */

 
 

-               this.event = utilRebind(this, dispatch$4, 'on');
-           },
+         if (/Win/.test(ua)) {
+           _detected.os = 'win';
+           _detected.platform = 'Windows';
+         } else if (/Mac/.test(ua)) {
+           _detected.os = 'mac';
+           _detected.platform = 'Macintosh';
+         } else if (/X11/.test(ua) || /Linux/.test(ua)) {
+           _detected.os = 'linux';
+           _detected.platform = 'Linux';
+         } else {
+           _detected.os = 'win';
+           _detected.platform = 'Unknown';
+         }

 
 

-           reset: function() {
-               if (_mlyCache) {
-                   Object.values(_mlyCache.images.inflight).forEach(abortRequest$3);
-                   Object.values(_mlyCache.image_detections.inflight).forEach(abortRequest$3);
-                   Object.values(_mlyCache.map_features.inflight).forEach(abortRequest$3);
-                   Object.values(_mlyCache.points.inflight).forEach(abortRequest$3);
-                   Object.values(_mlyCache.sequences.inflight).forEach(abortRequest$3);
-               }
-
-               _mlyCache = {
-                   images: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush(), forImageKey: {} },
-                   image_detections: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, forImageKey: {} },
-                   map_features: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush() },
-                   points: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush() },
-                   sequences: { inflight: {}, loaded: {}, nextPage: {}, nextURL: {}, rtree: new RBush(), forImageKey: {}, lineString: {} }
-               };
+         _detected.isMobileWebKit = (/\b(iPad|iPhone|iPod)\b/.test(ua) || // HACK: iPadOS 13+ requests desktop sites by default by using a Mac user agent,
+         // so assume any "mac" with multitouch is actually iOS
+         navigator.platform === 'MacIntel' && 'maxTouchPoints' in navigator && navigator.maxTouchPoints > 1) && /WebKit/.test(ua) && !/Edge/.test(ua) && !window.MSStream;
+         /* Locale */
+         // An array of locales requested by the browser in priority order.

 
 

-               _mlySelectedImageKey = null;
-               _mlyClicks = [];
-           },
+         _detected.browserLocales = Array.from(new Set( // remove duplicates
+         [navigator.language].concat(navigator.languages || []).concat([// old property for backwards compatibility
+         navigator.userLanguage]) // remove any undefined values
+         .filter(Boolean)));
+         /* Host */

 
 

+         var loc = window.top.location;
+         var origin = loc.origin;

 
 

-           images: function(projection) {
-               var limit = 5;
-               return searchLimited(limit, projection, _mlyCache.images.rtree);
-           },
+         if (!origin) {
+           // for unpatched IE11
+           origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port : '');
+         }

 
 

+         _detected.host = origin + loc.pathname;
+         return _detected;
+       }

 
 

-           signs: function(projection) {
-               var limit = 5;
-               return searchLimited(limit, projection, _mlyCache.map_features.rtree);
-           },
+       // Like selection.property('value', ...), but avoids no-op value sets,
+       // which can result in layout/repaint thrashing in some situations.
+       function utilGetSetValue(selection, value) {
+         function d3_selection_value(value) {
+           function valueNull() {
+             delete this.value;
+           }

 
 

+           function valueConstant() {
+             if (this.value !== value) {
+               this.value = value;
+             }
+           }

 
 

-           mapFeatures: function(projection) {
-               var limit = 5;
-               return searchLimited(limit, projection, _mlyCache.points.rtree);
-           },
+           function valueFunction() {
+             var x = value.apply(this, arguments);

 
 

+             if (x === null || x === undefined) {
+               delete this.value;
+             } else if (this.value !== x) {
+               this.value = x;
+             }
+           }

 
 

-           cachedImage: function(imageKey) {
-               return _mlyCache.images.forImageKey[imageKey];
-           },
+           return value === null || value === undefined ? valueNull : typeof value === 'function' ? valueFunction : valueConstant;
+         }

 
 

+         if (arguments.length === 1) {
+           return selection.property('value');
+         }

 
 

-           sequences: function(projection) {
-               var viewport = projection.clipExtent();
-               var min = [viewport[0][0], viewport[1][1]];
-               var max = [viewport[1][0], viewport[0][1]];
-               var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-               var sequenceKeys = {};
+         return selection.each(d3_selection_value(value));
+       }

 
 

-               // all sequences for images in viewport
-               _mlyCache.images.rtree.search(bbox)
-                   .forEach(function(d) {
-                       var sequenceKey = _mlyCache.sequences.forImageKey[d.data.key];
-                       if (sequenceKey) {
-                           sequenceKeys[sequenceKey] = true;
-                       }
-                   });
+       function utilKeybinding(namespace) {
+         var _keybindings = {};

 
 

-               // Return lineStrings for the sequences
-               return Object.keys(sequenceKeys).map(function(sequenceKey) {
-                   return _mlyCache.sequences.lineString[sequenceKey];
-               });
-           },
+         function testBindings(d3_event, isCapturing) {
+           var didMatch = false;
+           var bindings = Object.keys(_keybindings).map(function (id) {
+             return _keybindings[id];
+           });
+           var i, binding; // Most key shortcuts will accept either lower or uppercase ('h' or 'H'),
+           // so we don't strictly match on the shift key, but we prioritize
+           // shifted keybindings first, and fallback to unshifted only if no match.
+           // (This lets us differentiate between '←'/'⇧←' or '⌘Z'/'⌘⇧Z')
+           // priority match shifted keybindings first

 
 

+           for (i = 0; i < bindings.length; i++) {
+             binding = bindings[i];
+             if (!binding.event.modifiers.shiftKey) continue; // no shift

 
 

-           signsSupported: function() {
-               return true;
-           },
+             if (!!binding.capture !== isCapturing) continue;

 
 

+             if (matches(d3_event, binding, true)) {
+               binding.callback(d3_event);
+               didMatch = true; // match a max of one binding per event

 
 

-           loadImages: function(projection) {
-               loadTiles('images', apibase + 'images?sort_by=key&', projection);
-               loadTiles('sequences', apibase + 'sequences?sort_by=key&', projection);
-           },
+               break;
+             }
+           }

 
 

+           if (didMatch) return; // then unshifted keybindings

 
 

-           loadSigns: function(projection) {
-               // if we are looking at signs, we'll actually need to fetch images too
-               loadTiles('images', apibase + 'images?sort_by=key&', projection);
-               loadTiles('map_features', apibase + 'map_features?layers=trafficsigns&min_nbr_image_detections=2&sort_by=key&', projection);
-               loadTiles('image_detections', apibase + 'image_detections?layers=trafficsigns&sort_by=key&', projection);
-           },
+           for (i = 0; i < bindings.length; i++) {
+             binding = bindings[i];
+             if (binding.event.modifiers.shiftKey) continue; // shift

 
 

+             if (!!binding.capture !== isCapturing) continue;

 
 

-           loadMapFeatures: function(projection) {
-               // if we are looking at signs, we'll actually need to fetch images too
-               loadTiles('images', apibase + 'images?sort_by=key', projection);
-               loadTiles('points', apibase + 'map_features?layers=points&min_nbr_image_detections=2&sort_by=key&values=' + mapFeatureConfig.values + '&', projection);
-               loadTiles('image_detections', apibase + 'image_detections?layers=points&sort_by=key&values=' + mapFeatureConfig.values + '&', projection);
-           },
+             if (matches(d3_event, binding, false)) {
+               binding.callback(d3_event);
+               break;
+             }
+           }

 
 

+           function matches(d3_event, binding, testShift) {
+             var event = d3_event;
+             var isMatch = false;
+             var tryKeyCode = true; // Prefer a match on `KeyboardEvent.key`

 
 

-           loadViewer: function(context) {
-               // add mly-wrapper
-               var wrap = context.container().select('.photoviewer')
-                   .selectAll('.mly-wrapper')
-                   .data([0]);
+             if (event.key !== undefined) {
+               tryKeyCode = event.key.charCodeAt(0) > 255; // outside ISO-Latin-1

 
 

-               wrap.enter()
-                   .append('div')
-                   .attr('id', 'ideditor-mly')
-                   .attr('class', 'photo-wrapper mly-wrapper')
-                   .classed('hide', true);
+               isMatch = true;

 
 

-               // load mapillary-viewercss
-               select('head').selectAll('#ideditor-mapillary-viewercss')
-                   .data([0])
-                   .enter()
-                   .append('link')
-                   .attr('id', 'ideditor-mapillary-viewercss')
-                   .attr('rel', 'stylesheet')
-                   .attr('href', context.asset(viewercss));
+               if (binding.event.key === undefined) {
+                 isMatch = false;
+               } else if (Array.isArray(binding.event.key)) {
+                 if (binding.event.key.map(function (s) {
+                   return s.toLowerCase();
+                 }).indexOf(event.key.toLowerCase()) === -1) {
+                   isMatch = false;
+                 }
+               } else {
+                 if (event.key.toLowerCase() !== binding.event.key.toLowerCase()) {
+                   isMatch = false;
+                 }
+               }
+             } // Fallback match on `KeyboardEvent.keyCode`, can happen if:
+             // - browser doesn't support `KeyboardEvent.key`
+             // - `KeyboardEvent.key` is outside ISO-Latin-1 range (cyrillic?)

 
 

-               // load mapillary-viewerjs
-               select('head').selectAll('#ideditor-mapillary-viewerjs')
-                   .data([0])
-                   .enter()
-                   .append('script')
-                   .attr('id', 'ideditor-mapillary-viewerjs')
-                   .attr('src', context.asset(viewerjs));
-
-               // load mapillary signs sprite
-               var defs = context.container().select('defs');
-               defs.call(svgDefs(context).addSprites, ['mapillary-sprite', 'mapillary-object-sprite'], false /* don't override colors */ );
-
-               // Register viewer resize handler
-               context.ui().photoviewer.on('resize.mapillary', function() {
-                   if (_mlyViewer) {
-                       _mlyViewer.resize();
-                   }
-               });
-           },

 
 

+             if (!isMatch && tryKeyCode) {
+               isMatch = event.keyCode === binding.event.keyCode;
+             }
+
+             if (!isMatch) return false; // test modifier keys

 
 

-           showViewer: function(context) {
-               var wrap = context.container().select('.photoviewer')
-                   .classed('hide', false);
+             if (!(event.ctrlKey && event.altKey)) {
+               // if both are set, assume AltGr and skip it - #4096
+               if (event.ctrlKey !== binding.event.modifiers.ctrlKey) return false;
+               if (event.altKey !== binding.event.modifiers.altKey) return false;
+             }

 
 

-               var isHidden = wrap.selectAll('.photo-wrapper.mly-wrapper.hide').size();
+             if (event.metaKey !== binding.event.modifiers.metaKey) return false;
+             if (testShift && event.shiftKey !== binding.event.modifiers.shiftKey) return false;
+             return true;
+           }
+         }

 
 

-               if (isHidden && _mlyViewer) {
-                   wrap
-                       .selectAll('.photo-wrapper:not(.mly-wrapper)')
-                       .classed('hide', true);
+         function capture(d3_event) {
+           testBindings(d3_event, true);
+         }

 
 

-                   wrap
-                       .selectAll('.photo-wrapper.mly-wrapper')
-                       .classed('hide', false);
+         function bubble(d3_event) {
+           var tagName = select(d3_event.target).node().tagName;

 
 

-                   _mlyViewer.resize();
-               }
+           if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
+             return;
+           }

 
 

-               return this;
-           },
+           testBindings(d3_event, false);
+         }

 
 

+         function keybinding(selection) {
+           selection = selection || select(document);
+           selection.on('keydown.capture.' + namespace, capture, true);
+           selection.on('keydown.bubble.' + namespace, bubble, false);
+           return keybinding;
+         } // was: keybinding.off()

 
 

-           hideViewer: function(context) {
-               _mlySelectedImageKey = null;

 
 

-               if (!_mlyFallback && _mlyViewer) {
-                   _mlyViewer.getComponent('sequence').stop();
-               }
+         keybinding.unbind = function (selection) {
+           _keybindings = [];
+           selection = selection || select(document);
+           selection.on('keydown.capture.' + namespace, null);
+           selection.on('keydown.bubble.' + namespace, null);
+           return keybinding;
+         };

 
 

-               var viewer = context.container().select('.photoviewer');
-               if (!viewer.empty()) { viewer.datum(null); }
+         keybinding.clear = function () {
+           _keybindings = {};
+           return keybinding;
+         }; // Remove one or more keycode bindings.

 
 

-               viewer
-                   .classed('hide', true)
-                   .selectAll('.photo-wrapper')
-                   .classed('hide', true);

 
 

-               context.container().selectAll('.viewfield-group, .sequence, .icon-detected')
-                   .classed('currentView', false);
+         keybinding.off = function (codes, capture) {
+           var arr = utilArrayUniq([].concat(codes));

 
 

-               return this.setStyles(context, null, true);
-           },
+           for (var i = 0; i < arr.length; i++) {
+             var id = arr[i] + (capture ? '-capture' : '-bubble');
+             delete _keybindings[id];
+           }

 
 

+           return keybinding;
+         }; // Add one or more keycode bindings.
+
+
+         keybinding.on = function (codes, callback, capture) {
+           if (typeof callback !== 'function') {
+             return keybinding.off(codes, capture);
+           }
+
+           var arr = utilArrayUniq([].concat(codes));
+
+           for (var i = 0; i < arr.length; i++) {
+             var id = arr[i] + (capture ? '-capture' : '-bubble');
+             var binding = {
+               id: id,
+               capture: capture,
+               callback: callback,
+               event: {
+                 key: undefined,
+                 // preferred
+                 keyCode: 0,
+                 // fallback
+                 modifiers: {
+                   shiftKey: false,
+                   ctrlKey: false,
+                   altKey: false,
+                   metaKey: false
+                 }
+               }
+             };

 
 

-           parsePagination: parsePagination,
+             if (_keybindings[id]) {
+               console.warn('warning: duplicate keybinding for "' + id + '"'); // eslint-disable-line no-console
+             }

 
 

+             _keybindings[id] = binding;
+             var matches = arr[i].toLowerCase().match(/(?:(?:[^+⇧⌃⌥⌘])+|[⇧⌃⌥⌘]|\+\+|^\+$)/g);

 
 

-           updateViewer: function(context, imageKey) {
-               if (!imageKey) { return this; }
+             for (var j = 0; j < matches.length; j++) {
+               // Normalise matching errors
+               if (matches[j] === '++') matches[j] = '+';

 
 

-               if (!_mlyViewer) {
-                   this.initViewer(context, imageKey);
+               if (matches[j] in utilKeybinding.modifierCodes) {
+                 var prop = utilKeybinding.modifierProperties[utilKeybinding.modifierCodes[matches[j]]];
+                 binding.event.modifiers[prop] = true;

                } else {
                } else {

-                   _mlyViewer.moveToKey(imageKey)
-                       .catch(function(e) { console.error('mly3', e); });  // eslint-disable-line no-console
+                 binding.event.key = utilKeybinding.keys[matches[j]] || matches[j];
+
+                 if (matches[j] in utilKeybinding.keyCodes) {
+                   binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
+                 }

                }
                }

+             }
+           }

 
 

-               return this;
-           },
+           return keybinding;
+         };

 
 

+         return keybinding;
+       }
+       /*
+        * See https://github.com/keithamus/jwerty
+        */

 
 

-           initViewer: function(context, imageKey) {
-               var that = this;
-               if (window.Mapillary && imageKey) {
-                   var opts = {
-                       baseImageSize: 320,
-                       component: {
-                           cover: false,
-                           keyboard: false,
-                           tag: true
-                       }
-                   };
+       utilKeybinding.modifierCodes = {
+         // Shift key, ⇧
+         '⇧': 16,
+         shift: 16,
+         // CTRL key, on Mac: ⌃
+         '⌃': 17,
+         ctrl: 17,
+         // ALT key, on Mac: ⌥ (Alt)
+         '⌥': 18,
+         alt: 18,
+         option: 18,
+         // META, on Mac: ⌘ (CMD), on Windows (Win), on Linux (Super)
+         '⌘': 91,
+         meta: 91,
+         cmd: 91,
+         'super': 91,
+         win: 91
+       };
+       utilKeybinding.modifierProperties = {
+         16: 'shiftKey',
+         17: 'ctrlKey',
+         18: 'altKey',
+         91: 'metaKey'
+       };
+       utilKeybinding.plusKeys = ['plus', 'ffplus', '=', 'ffequals', '≠', '±'];
+       utilKeybinding.minusKeys = ['_', '-', 'ffminus', 'dash', '–', '—'];
+       utilKeybinding.keys = {
+         // Backspace key, on Mac: ⌫ (Backspace)
+         '⌫': 'Backspace',
+         backspace: 'Backspace',
+         // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
+         '⇥': 'Tab',
+         '⇆': 'Tab',
+         tab: 'Tab',
+         // Return key, ↩
+         '↩': 'Enter',
+         '↵': 'Enter',
+         '⏎': 'Enter',
+         'return': 'Enter',
+         enter: 'Enter',
+         '⌅': 'Enter',
+         // Pause/Break key
+         'pause': 'Pause',
+         'pause-break': 'Pause',
+         // Caps Lock key, ⇪
+         '⇪': 'CapsLock',
+         caps: 'CapsLock',
+         'caps-lock': 'CapsLock',
+         // Escape key, on Mac: ⎋, on Windows: Esc
+         '⎋': ['Escape', 'Esc'],
+         escape: ['Escape', 'Esc'],
+         esc: ['Escape', 'Esc'],
+         // Space key
+         space: [' ', 'Spacebar'],
+         // Page-Up key, or pgup, on Mac: ↖
+         '↖': 'PageUp',
+         pgup: 'PageUp',
+         'page-up': 'PageUp',
+         // Page-Down key, or pgdown, on Mac: ↘
+         '↘': 'PageDown',
+         pgdown: 'PageDown',
+         'page-down': 'PageDown',
+         // END key, on Mac: ⇟
+         '⇟': 'End',
+         end: 'End',
+         // HOME key, on Mac: ⇞
+         '⇞': 'Home',
+         home: 'Home',
+         // Insert key, or ins
+         ins: 'Insert',
+         insert: 'Insert',
+         // Delete key, on Mac: ⌦ (Delete)
+         '⌦': ['Delete', 'Del'],
+         del: ['Delete', 'Del'],
+         'delete': ['Delete', 'Del'],
+         // Left Arrow Key, or ←
+         '←': ['ArrowLeft', 'Left'],
+         left: ['ArrowLeft', 'Left'],
+         'arrow-left': ['ArrowLeft', 'Left'],
+         // Up Arrow Key, or ↑
+         '↑': ['ArrowUp', 'Up'],
+         up: ['ArrowUp', 'Up'],
+         'arrow-up': ['ArrowUp', 'Up'],
+         // Right Arrow Key, or →
+         '→': ['ArrowRight', 'Right'],
+         right: ['ArrowRight', 'Right'],
+         'arrow-right': ['ArrowRight', 'Right'],
+         // Up Arrow Key, or ↓
+         '↓': ['ArrowDown', 'Down'],
+         down: ['ArrowDown', 'Down'],
+         'arrow-down': ['ArrowDown', 'Down'],
+         // odities, stuff for backward compatibility (browsers and code):
+         // Num-Multiply, or *
+         '*': ['*', 'Multiply'],
+         star: ['*', 'Multiply'],
+         asterisk: ['*', 'Multiply'],
+         multiply: ['*', 'Multiply'],
+         // Num-Plus or +
+         '+': ['+', 'Add'],
+         'plus': ['+', 'Add'],
+         // Num-Subtract, or -
+         '-': ['-', 'Subtract'],
+         subtract: ['-', 'Subtract'],
+         'dash': ['-', 'Subtract'],
+         // Semicolon
+         semicolon: ';',
+         // = or equals
+         equals: '=',
+         // Comma, or ,
+         comma: ',',
+         // Period, or ., or full-stop
+         period: '.',
+         'full-stop': '.',
+         // Slash, or /, or forward-slash
+         slash: '/',
+         'forward-slash': '/',
+         // Tick, or `, or back-quote
+         tick: '`',
+         'back-quote': '`',
+         // Open bracket, or [
+         'open-bracket': '[',
+         // Back slash, or \
+         'back-slash': '\\',
+         // Close backet, or ]
+         'close-bracket': ']',
+         // Apostrophe, or Quote, or '
+         quote: '\'',
+         apostrophe: '\'',
+         // NUMPAD 0-9
+         'num-0': '0',
+         'num-1': '1',
+         'num-2': '2',
+         'num-3': '3',
+         'num-4': '4',
+         'num-5': '5',
+         'num-6': '6',
+         'num-7': '7',
+         'num-8': '8',
+         'num-9': '9',
+         // F1-F25
+         f1: 'F1',
+         f2: 'F2',
+         f3: 'F3',
+         f4: 'F4',
+         f5: 'F5',
+         f6: 'F6',
+         f7: 'F7',
+         f8: 'F8',
+         f9: 'F9',
+         f10: 'F10',
+         f11: 'F11',
+         f12: 'F12',
+         f13: 'F13',
+         f14: 'F14',
+         f15: 'F15',
+         f16: 'F16',
+         f17: 'F17',
+         f18: 'F18',
+         f19: 'F19',
+         f20: 'F20',
+         f21: 'F21',
+         f22: 'F22',
+         f23: 'F23',
+         f24: 'F24',
+         f25: 'F25'
+       };
+       utilKeybinding.keyCodes = {
+         // Backspace key, on Mac: ⌫ (Backspace)
+         '⌫': 8,
+         backspace: 8,
+         // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
+         '⇥': 9,
+         '⇆': 9,
+         tab: 9,
+         // Return key, ↩
+         '↩': 13,
+         '↵': 13,
+         '⏎': 13,
+         'return': 13,
+         enter: 13,
+         '⌅': 13,
+         // Pause/Break key
+         'pause': 19,
+         'pause-break': 19,
+         // Caps Lock key, ⇪
+         '⇪': 20,
+         caps: 20,
+         'caps-lock': 20,
+         // Escape key, on Mac: ⎋, on Windows: Esc
+         '⎋': 27,
+         escape: 27,
+         esc: 27,
+         // Space key
+         space: 32,
+         // Page-Up key, or pgup, on Mac: ↖
+         '↖': 33,
+         pgup: 33,
+         'page-up': 33,
+         // Page-Down key, or pgdown, on Mac: ↘
+         '↘': 34,
+         pgdown: 34,
+         'page-down': 34,
+         // END key, on Mac: ⇟
+         '⇟': 35,
+         end: 35,
+         // HOME key, on Mac: ⇞
+         '⇞': 36,
+         home: 36,
+         // Insert key, or ins
+         ins: 45,
+         insert: 45,
+         // Delete key, on Mac: ⌦ (Delete)
+         '⌦': 46,
+         del: 46,
+         'delete': 46,
+         // Left Arrow Key, or ←
+         '←': 37,
+         left: 37,
+         'arrow-left': 37,
+         // Up Arrow Key, or ↑
+         '↑': 38,
+         up: 38,
+         'arrow-up': 38,
+         // Right Arrow Key, or →
+         '→': 39,
+         right: 39,
+         'arrow-right': 39,
+         // Up Arrow Key, or ↓
+         '↓': 40,
+         down: 40,
+         'arrow-down': 40,
+         // odities, printing characters that come out wrong:
+         // Firefox Equals
+         'ffequals': 61,
+         // Num-Multiply, or *
+         '*': 106,
+         star: 106,
+         asterisk: 106,
+         multiply: 106,
+         // Num-Plus or +
+         '+': 107,
+         'plus': 107,
+         // Num-Subtract, or -
+         '-': 109,
+         subtract: 109,
+         // Vertical Bar / Pipe
+         '|': 124,
+         // Firefox Plus
+         'ffplus': 171,
+         // Firefox Minus
+         'ffminus': 173,
+         // Semicolon
+         ';': 186,
+         semicolon: 186,
+         // = or equals
+         '=': 187,
+         'equals': 187,
+         // Comma, or ,
+         ',': 188,
+         comma: 188,
+         // Dash / Underscore key
+         'dash': 189,
+         // Period, or ., or full-stop
+         '.': 190,
+         period: 190,
+         'full-stop': 190,
+         // Slash, or /, or forward-slash
+         '/': 191,
+         slash: 191,
+         'forward-slash': 191,
+         // Tick, or `, or back-quote
+         '`': 192,
+         tick: 192,
+         'back-quote': 192,
+         // Open bracket, or [
+         '[': 219,
+         'open-bracket': 219,
+         // Back slash, or \
+         '\\': 220,
+         'back-slash': 220,
+         // Close backet, or ]
+         ']': 221,
+         'close-bracket': 221,
+         // Apostrophe, or Quote, or '
+         '\'': 222,
+         quote: 222,
+         apostrophe: 222
+       }; // NUMPAD 0-9
+
+       var i = 95,
+           n = 0;
+
+       while (++i < 106) {
+         utilKeybinding.keyCodes['num-' + n] = i;
+         ++n;
+       } // 0-9
+
+
+       i = 47;
+       n = 0;
+
+       while (++i < 58) {
+         utilKeybinding.keyCodes[n] = i;
+         ++n;
+       } // F1-F25
+
+
+       i = 111;
+       n = 1;
+
+       while (++i < 136) {
+         utilKeybinding.keyCodes['f' + n] = i;
+         ++n;
+       } // a-z
+
+
+       i = 64;
+
+       while (++i < 91) {
+         utilKeybinding.keyCodes[String.fromCharCode(i).toLowerCase()] = i;
+       }

 
 

-                   // Disable components requiring WebGL support
-                   if (!Mapillary.isSupported() && Mapillary.isFallbackSupported()) {
-                       _mlyFallback = true;
-                       opts.component = {
-                           cover: false,
-                           direction: false,
-                           imagePlane: false,
-                           keyboard: false,
-                           mouse: false,
-                           sequence: false,
-                           tag: false,
-                           image: true,        // fallback
-                           navigation: true    // fallback
-                       };
-                   }
+       function utilObjectOmit(obj, omitKeys) {
+         return Object.keys(obj).reduce(function (result, key) {
+           if (omitKeys.indexOf(key) === -1) {
+             result[key] = obj[key]; // keep
+           }
+
+           return result;
+         }, {});
+       }
+
+       // Copies a variable number of methods from source to target.
+       function utilRebind(target, source) {
+         var i = 1,
+             n = arguments.length,
+             method;
+
+         while (++i < n) {
+           target[method = arguments[i]] = d3_rebind(target, source, source[method]);
+         }
+
+         return target;
+       } // Method is assumed to be a standard D3 getter-setter:
+       // If passed with no arguments, gets the value.
+       // If passed with arguments, sets the value and returns the target.
+
+       function d3_rebind(target, source, method) {
+         return function () {
+           var value = method.apply(source, arguments);
+           return value === source ? target : value;
+         };
+       }
+
+       // A per-domain session mutex backed by a cookie and dead man's
+       // switch. If the session crashes, the mutex will auto-release
+       // after 5 seconds.
+       // This accepts a string and returns an object that complies with utilSessionMutexType
+       function utilSessionMutex(name) {
+         var mutex = {};
+         var intervalID;

 
 

-                   _mlyViewer = new Mapillary.Viewer('ideditor-mly', clientId, null, opts);
-                   _mlyViewer.on('nodechanged', nodeChanged);
-                   _mlyViewer.on('bearingchanged', bearingChanged);
-                   _mlyViewer.moveToKey(imageKey)
-                       .catch(function(e) { console.error('mly3', e); });  // eslint-disable-line no-console
-               }
-
-               // nodeChanged: called after the viewer has changed images and is ready.
-               //
-               // There is some logic here to batch up clicks into a _mlyClicks array
-               // because the user might click on a lot of markers quickly and nodechanged
-               // may be called out of order asychronously.
-               //
-               // Clicks are added to the array in `selectedImage` and removed here.
-               //
-               function nodeChanged(node) {
-                   if (!_mlyFallback) {
-                       _mlyViewer.getComponent('tag').removeAll();  // remove previous detections
-                   }
+         function renew() {
+           var expires = new Date();
+           expires.setSeconds(expires.getSeconds() + 5);
+           document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
+         }

 
 

-                   var clicks = _mlyClicks;
-                   var index = clicks.indexOf(node.key);
-                   var selectedKey = _mlySelectedImageKey;
+         mutex.lock = function () {
+           if (intervalID) return true;
+           var cookie = document.cookie.replace(new RegExp('(?:(?:^|.*;)\\s*' + name + '\\s*\\=\\s*([^;]*).*$)|^.*$'), '$1');
+           if (cookie) return false;
+           renew();
+           intervalID = window.setInterval(renew, 4000);
+           return true;
+         };

 
 

-                   if (index > -1) {              // `nodechanged` initiated from clicking on a marker..
-                       clicks.splice(index, 1);   // remove the click
-                       // If `node.key` matches the current _mlySelectedImageKey, call `selectImage()`
-                       // one more time to update the detections and attribution..
-                       if (node.key === selectedKey) {
-                           that.selectImage(context, _mlySelectedImageKey, true);
-                       }
-                   } else {             // `nodechanged` initiated from the Mapillary viewer controls..
-                       var loc = node.computedLatLon ? [node.computedLatLon.lon, node.computedLatLon.lat] : [node.latLon.lon, node.latLon.lat];
-                       context.map().centerEase(loc);
-                       that.selectImage(context, node.key, true);
-                   }
-               }
+         mutex.unlock = function () {
+           if (!intervalID) return;
+           document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
+           clearInterval(intervalID);
+           intervalID = null;
+         };

 
 

-               function bearingChanged(e) {
-                   dispatch$4.call('bearingChanged', undefined, e);
-               }
-           },
+         mutex.locked = function () {
+           return !!intervalID;
+         };

 
 

+         return mutex;
+       }

 
 

-           // Pass in the image key string as `imageKey`.
-           // This allows images to be selected from places that dont have access
-           // to the full image datum (like the street signs layer or the js viewer)
-           selectImage: function(context, imageKey, fromViewer) {
+       function utilTiler() {
+         var _size = [256, 256];
+         var _scale = 256;
+         var _tileSize = 256;
+         var _zoomExtent = [0, 20];
+         var _translate = [_size[0] / 2, _size[1] / 2];
+         var _margin = 0;
+         var _skipNullIsland = false;
+
+         function clamp(num, min, max) {
+           return Math.max(min, Math.min(num, max));
+         }

 
 

-               _mlySelectedImageKey = imageKey;
+         function nearNullIsland(tile) {
+           var x = tile[0];
+           var y = tile[1];
+           var z = tile[2];

 
 

-               // Note the datum could be missing, but we'll try to carry on anyway.
-               // There just might be a delay before user sees detections, captured_at, etc.
-               var d = _mlyCache.images.forImageKey[imageKey];
+           if (z >= 7) {
+             var center = Math.pow(2, z - 1);
+             var width = Math.pow(2, z - 6);
+             var min = center - width / 2;
+             var max = center + width / 2 - 1;
+             return x >= min && x <= max && y >= min && y <= max;
+           }

 
 

-               var viewer = context.container().select('.photoviewer');
-               if (!viewer.empty()) { viewer.datum(d); }
+           return false;
+         }

 
 

-               imageKey = (d && d.key) || imageKey;
-               if (!fromViewer && imageKey) {
-                   _mlyClicks.push(imageKey);
-               }
+         function tiler() {
+           var z = geoScaleToZoom(_scale / (2 * Math.PI), _tileSize);
+           var z0 = clamp(Math.round(z), _zoomExtent[0], _zoomExtent[1]);
+           var tileMin = 0;
+           var tileMax = Math.pow(2, z0) - 1;
+           var log2ts = Math.log(_tileSize) * Math.LOG2E;
+           var k = Math.pow(2, z - z0 + log2ts);
+           var origin = [(_translate[0] - _scale / 2) / k, (_translate[1] - _scale / 2) / k];
+           var cols = range$1(clamp(Math.floor(-origin[0]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[0] / k - origin[0]) + _margin, tileMin, tileMax + 1));
+           var rows = range$1(clamp(Math.floor(-origin[1]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[1] / k - origin[1]) + _margin, tileMin, tileMax + 1));
+           var tiles = [];

 
 

-               this.setStyles(context, null, true);
+           for (var i = 0; i < rows.length; i++) {
+             var y = rows[i];

 
 

-               // if signs signs are shown, highlight the ones that appear in this image
-               context.container().selectAll('.layer-mapillary-signs .icon-detected')
-                   .classed('currentView', function(d) {
-                       return d.detections.some(function(detection) {
-                           return detection.image_key === imageKey;
-                       });
-                   });
+             for (var j = 0; j < cols.length; j++) {
+               var x = cols[j];

 
 

-               if (d) {
-                   this.updateDetections(d);
+               if (i >= _margin && i <= rows.length - _margin && j >= _margin && j <= cols.length - _margin) {
+                 tiles.unshift([x, y, z0]); // tiles in view at beginning
+               } else {
+                 tiles.push([x, y, z0]); // tiles in margin at the end

                }
                }

+             }
+           }

 
 

-               return this;
-           },
-
-
-           getSelectedImageKey: function() {
-               return _mlySelectedImageKey;
-           },
+           tiles.translate = origin;
+           tiles.scale = k;
+           return tiles;
+         }
+         /**
+          * getTiles() returns an array of tiles that cover the map view
+          */

 
 
 
 

-           getSequenceKeyForImageKey: function(imageKey) {
-               return _mlyCache.sequences.forImageKey[imageKey];
-           },
+         tiler.getTiles = function (projection) {
+           var origin = [projection.scale() * Math.PI - projection.translate()[0], projection.scale() * Math.PI - projection.translate()[1]];
+           this.size(projection.clipExtent()[1]).scale(projection.scale() * 2 * Math.PI).translate(projection.translate());
+           var tiles = tiler();
+           var ts = tiles.scale;
+           return tiles.map(function (tile) {
+             if (_skipNullIsland && nearNullIsland(tile)) {
+               return false;
+             }

 
 

+             var x = tile[0] * ts - origin[0];
+             var y = tile[1] * ts - origin[1];
+             return {
+               id: tile.toString(),
+               xyz: tile,
+               extent: geoExtent(projection.invert([x, y + ts]), projection.invert([x + ts, y]))
+             };
+           }).filter(Boolean);
+         };
+         /**
+          * getGeoJSON() returns a FeatureCollection for debugging tiles
+          */

 
 

-           // Updates the currently highlighted sequence and selected bubble.
-           // Reset is only necessary when interacting with the viewport because
-           // this implicitly changes the currently selected bubble/sequence
-           setStyles: function(context, hovered, reset) {
-               if (reset) {  // reset all layers
-                   context.container().selectAll('.viewfield-group')
-                       .classed('highlighted', false)
-                       .classed('hovered', false)
-                       .classed('currentView', false);

 
 

-                   context.container().selectAll('.sequence')
-                       .classed('highlighted', false)
-                       .classed('currentView', false);
+         tiler.getGeoJSON = function (projection) {
+           var features = tiler.getTiles(projection).map(function (tile) {
+             return {
+               type: 'Feature',
+               properties: {
+                 id: tile.id,
+                 name: tile.id
+               },
+               geometry: {
+                 type: 'Polygon',
+                 coordinates: [tile.extent.polygon()]

                }
                }

+             };
+           });
+           return {
+             type: 'FeatureCollection',
+             features: features
+           };
+         };

 
 

-               var hoveredImageKey = hovered && hovered.key;
-               var hoveredSequenceKey = hoveredImageKey && this.getSequenceKeyForImageKey(hoveredImageKey);
-               var hoveredLineString = hoveredSequenceKey && _mlyCache.sequences.lineString[hoveredSequenceKey];
-               var hoveredImageKeys = (hoveredLineString && hoveredLineString.properties.coordinateProperties.image_keys) || [];
+         tiler.tileSize = function (val) {
+           if (!arguments.length) return _tileSize;
+           _tileSize = val;
+           return tiler;
+         };

 
 

-               var selectedImageKey = _mlySelectedImageKey;
-               var selectedSequenceKey = selectedImageKey && this.getSequenceKeyForImageKey(selectedImageKey);
-               var selectedLineString = selectedSequenceKey && _mlyCache.sequences.lineString[selectedSequenceKey];
-               var selectedImageKeys = (selectedLineString && selectedLineString.properties.coordinateProperties.image_keys) || [];
+         tiler.zoomExtent = function (val) {
+           if (!arguments.length) return _zoomExtent;
+           _zoomExtent = val;
+           return tiler;
+         };

 
 

-               // highlight sibling viewfields on either the selected or the hovered sequences
-               var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
+         tiler.size = function (val) {
+           if (!arguments.length) return _size;
+           _size = val;
+           return tiler;
+         };

 
 

-               context.container().selectAll('.layer-mapillary .viewfield-group')
-                   .classed('highlighted', function(d) { return highlightedImageKeys.indexOf(d.key) !== -1; })
-                   .classed('hovered', function(d) { return d.key === hoveredImageKey; })
-                   .classed('currentView', function(d) { return d.key === selectedImageKey; });
+         tiler.scale = function (val) {
+           if (!arguments.length) return _scale;
+           _scale = val;
+           return tiler;
+         };

 
 

-               context.container().selectAll('.layer-mapillary .sequence')
-                   .classed('highlighted', function(d) { return d.properties.key === hoveredSequenceKey; })
-                   .classed('currentView', function(d) { return d.properties.key === selectedSequenceKey; });
+         tiler.translate = function (val) {
+           if (!arguments.length) return _translate;
+           _translate = val;
+           return tiler;
+         }; // number to extend the rows/columns beyond those covering the viewport

 
 

-               // update viewfields if needed
-               context.container().selectAll('.viewfield-group .viewfield')
-                   .attr('d', viewfieldPath);

 
 

-               function viewfieldPath() {
-                   var d = this.parentNode.__data__;
-                   if (d.pano && d.key !== selectedImageKey) {
-                       return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-                   } else {
-                       return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-                   }
-               }
+         tiler.margin = function (val) {
+           if (!arguments.length) return _margin;
+           _margin = +val;
+           return tiler;
+         };

 
 

-               return this;
-           },
+         tiler.skipNullIsland = function (val) {
+           if (!arguments.length) return _skipNullIsland;
+           _skipNullIsland = val;
+           return tiler;
+         };

 
 

+         return tiler;
+       }

 
 

-           updateDetections: function(d) {
-               if (!_mlyViewer || _mlyFallback) { return; }
+       function utilTriggerEvent(target, type) {
+         target.each(function () {
+           var evt = document.createEvent('HTMLEvents');
+           evt.initEvent(type, true, true);
+           this.dispatchEvent(evt);
+         });
+       }

 
 

-               var imageKey = d && d.key;
-               if (!imageKey) { return; }
+       var _mainLocations = coreLocations(); // singleton
+       // `coreLocations` maintains an internal index of all the boundaries/geofences used by iD.
+       // It's used by presets, community index, background imagery, to know where in the world these things are valid.
+       // These geofences should be defined by `locationSet` objects:
+       //
+       // let locationSet = {
+       //   include: [ Array of locations ],
+       //   exclude: [ Array of locations ]
+       // };
+       //
+       // For more info see the location-conflation and country-coder projects, see:
+       // https://github.com/ideditor/location-conflation
+       // https://github.com/ideditor/country-coder
+       //

 
 

-               var detections = _mlyCache.image_detections.forImageKey[imageKey] || [];
-               detections.forEach(function(data) {
-                   var tag = makeTag(data);
-                   if (tag) {
-                       var tagComponent = _mlyViewer.getComponent('tag');
-                       tagComponent.add([tag]);
-                   }
-               });
+       function coreLocations() {
+         var _this = {};
+         var _resolvedFeatures = {}; // cache of *resolved* locationSet features

 
 

-               function makeTag(data) {
-                   var valueParts = data.value.split('--');
-                   if (valueParts.length !== 3) { return; }
-
-                   var text = valueParts[1].replace(/-/g, ' ');
-                   var tag;
-
-                   // Currently only two shapes <Polygon|Point>
-                   if (data.shape.type === 'Polygon') {
-                       var polygonGeometry = new Mapillary
-                           .TagComponent
-                           .PolygonGeometry(data.shape.coordinates[0]);
-
-                       tag = new Mapillary.TagComponent.OutlineTag(
-                           data.key,
-                           polygonGeometry,
-                           {
-                               text: text,
-                               textColor: 0xffff00,
-                               lineColor: 0xffff00,
-                               lineWidth: 2,
-                               fillColor: 0xffff00,
-                               fillOpacity: 0.3,
-                           }
-                       );
+         var _loco = new _default(); // instance of a location-conflation resolver

 
 

-                   } else if (data.shape.type === 'Point') {
-                       var pointGeometry = new Mapillary
-                           .TagComponent
-                           .PointGeometry(data.shape.coordinates[0]);
-
-                       tag = new Mapillary.TagComponent.SpotTag(
-                           data.key,
-                           pointGeometry,
-                           {
-                               text: text,
-                               color: 0xffff00,
-                               textColor: 0xffff00
-                           }
-                       );
-                   }

 
 

-                   return tag;
-               }
-           },
+         var _wp; // instance of a which-polygon index
+         // pre-resolve the worldwide locationSet

 
 
 
 

-           cache: function() {
-               return _mlyCache;
+         var world = {
+           locationSet: {
+             include: ['Q2']

            }
            }

+         };
+         resolveLocationSet(world);
+         rebuildIndex();
+         var _queue = [];

 
 

-       };
+         var _deferred = new Set();

 
 

-       function validationIssue(attrs) {
-           this.type = attrs.type;                // required - name of rule that created the issue (e.g. 'missing_tag')
-           this.subtype = attrs.subtype;          // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
-           this.severity = attrs.severity;        // required - 'warning' or 'error'
-           this.message = attrs.message;          // required - function returning localized string
-           this.reference = attrs.reference;      // optional - function(selection) to render reference information
-           this.entityIds = attrs.entityIds;      // optional - array of IDs of entities involved in the issue
-           this.loc = attrs.loc;                  // optional - [lon, lat] to zoom in on to see the issue
-           this.data = attrs.data;                // optional - object containing extra data for the fixes
-           this.dynamicFixes = attrs.dynamicFixes;// optional - function(context) returning fixes
-           this.hash = attrs.hash;                // optional - string to further differentiate the issue
+         var _inProcess; // Returns a Promise to process the queue

 
 

-           this.id = generateID.apply(this);      // generated - see below
-           this.autoFix = null;                   // generated - if autofix exists, will be set below

 
 

-           // A unique, deterministic string hash.
-           // Issues with identical id values are considered identical.
-           function generateID() {
-               var parts = [this.type];
+         function processQueue() {
+           if (!_queue.length) return Promise.resolve(); // console.log(`queue length ${_queue.length}`);

 
 

-               if (this.hash) {   // subclasses can pass in their own differentiator
-                   parts.push(this.hash);
-               }
+           var chunk = _queue.pop();

 
 

-               if (this.subtype) {
-                   parts.push(this.subtype);
-               }
+           return new Promise(function (resolvePromise) {
+             var handle = window.requestIdleCallback(function () {
+               _deferred["delete"](handle); // const t0 = performance.now();

 
 

-               // include the entities this issue is for
-               // (sort them so the id is deterministic)
-               if (this.entityIds) {
-                   var entityKeys = this.entityIds.slice().sort();
-                   parts.push.apply(parts, entityKeys);
-               }

 
 

-               return parts.join(':');
-           }
+               chunk.forEach(resolveLocationSet); // const t1 = performance.now();
+               // console.log('chunk processed in ' + (t1 - t0) + ' ms');

 
 

-           this.extent = function(resolver) {
-               if (this.loc) {
-                   return geoExtent(this.loc);
-               }
-               if (this.entityIds && this.entityIds.length) {
-                   return this.entityIds.reduce(function(extent, entityId) {
-                       return extent.extend(resolver.entity(entityId).extent(resolver));
-                   }, geoExtent());
-               }
-               return null;
-           };
+               resolvePromise();
+             });

 
 

-           this.fixes = function(context) {
-               var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
-               var issue = this;
+             _deferred.add(handle);
+           }).then(function () {
+             return processQueue();
+           });
+         } // Pass an Object with a `locationSet` property,
+         // Performs the locationSet resolution, caches the result, and sets a `locationSetID` property on the object.

 
 

-               if (issue.severity === 'warning') {
-                   // allow ignoring any issue that's not an error
-                   fixes.push(new validationIssueFix({
-                       title: _t('issues.fix.ignore_issue.title'),
-                       icon: 'iD-icon-close',
-                       onClick: function() {
-                           context.validator().ignoreIssue(this.issue.id);
-                       }
-                   }));
-               }

 
 

-               fixes.forEach(function(fix) {
-                   fix.id = fix.title;
-                   // add a reference to the issue for use in actions
-                   fix.issue = issue;
-                   if (fix.autoArgs) {
-                       issue.autoFix = fix;
-                   }
-               });
-               return fixes;
-           };
+         function resolveLocationSet(obj) {
+           if (obj.locationSetID) return; // work was done already

 
 

-       }
+           try {
+             var locationSet = obj.locationSet;

 
 

+             if (!locationSet) {
+               throw new Error('object missing locationSet property');
+             }

 
 

-       function validationIssueFix(attrs) {
-           this.title = attrs.title;                   // Required
-           this.onClick = attrs.onClick;               // Optional - the function to run to apply the fix
-           this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
-           this.icon = attrs.icon;                     // Optional - shows 'iD-icon-wrench' if not set
-           this.entityIds = attrs.entityIds || [];     // Optional - used for hover-higlighting.
-           this.autoArgs = attrs.autoArgs;             // Optional - pass [actions, annotation] arglist if this fix can automatically run
+             if (!locationSet.include) {
+               // missing `include`, default to worldwide include
+               locationSet.include = ['Q2']; // https://github.com/openstreetmap/iD/pull/8305#discussion_r662344647
+             }

 
 

-           this.issue = null;    // Generated link - added by validationIssue
-       }
+             var resolved = _loco.resolveLocationSet(locationSet);

 
 

-       var buildRuleChecks = function() {
-           return {
-               equals: function (equals) {
-                   return function(tags) {
-                       return Object.keys(equals).every(function(k) {
-                           return equals[k] === tags[k];
-                       });
-                   };
-               },
-               notEquals: function (notEquals) {
-                   return function(tags) {
-                       return Object.keys(notEquals).some(function(k) {
-                           return notEquals[k] !== tags[k];
-                       });
-                   };
-               },
-               absence: function(absence) {
-                   return function(tags) {
-                       return Object.keys(tags).indexOf(absence) === -1;
-                   };
-               },
-               presence: function(presence) {
-                   return function(tags) {
-                       return Object.keys(tags).indexOf(presence) > -1;
-                   };
-               },
-               greaterThan: function(greaterThan) {
-                   var key = Object.keys(greaterThan)[0];
-                   var value = greaterThan[key];
+             var locationSetID = resolved.id;
+             obj.locationSetID = locationSetID;

 
 

-                   return function(tags) {
-                       return tags[key] > value;
-                   };
-               },
-               greaterThanEqual: function(greaterThanEqual) {
-                   var key = Object.keys(greaterThanEqual)[0];
-                   var value = greaterThanEqual[key];
+             if (!resolved.feature.geometry.coordinates.length || !resolved.feature.properties.area) {
+               throw new Error("locationSet ".concat(locationSetID, " resolves to an empty feature."));
+             }

 
 

-                   return function(tags) {
-                       return tags[key] >= value;
-                   };
-               },
-               lessThan: function(lessThan) {
-                   var key = Object.keys(lessThan)[0];
-                   var value = lessThan[key];
+             if (!_resolvedFeatures[locationSetID]) {
+               // First time seeing this locationSet feature
+               var feature = JSON.parse(JSON.stringify(resolved.feature)); // deep clone

 
 

-                   return function(tags) {
-                       return tags[key] < value;
-                   };
-               },
-               lessThanEqual: function(lessThanEqual) {
-                   var key = Object.keys(lessThanEqual)[0];
-                   var value = lessThanEqual[key];
+               feature.id = locationSetID; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)

 
 

-                   return function(tags) {
-                       return tags[key] <= value;
-                   };
-               },
-               positiveRegex: function(positiveRegex) {
-                   var tagKey = Object.keys(positiveRegex)[0];
-                   var expression = positiveRegex[tagKey].join('|');
-                   var regex = new RegExp(expression);
+               feature.properties.id = locationSetID;
+               _resolvedFeatures[locationSetID] = feature; // insert into cache
+             }
+           } catch (err) {
+             obj.locationSet = {
+               include: ['Q2']
+             }; // default worldwide

 
 

-                   return function(tags) {
-                       return regex.test(tags[tagKey]);
-                   };
-               },
-               negativeRegex: function(negativeRegex) {
-                   var tagKey = Object.keys(negativeRegex)[0];
-                   var expression = negativeRegex[tagKey].join('|');
-                   var regex = new RegExp(expression);
+             obj.locationSetID = '+[Q2]';
+           }
+         } // Rebuilds the whichPolygon index with whatever features have been resolved.

 
 

-                   return function(tags) {
-                       return !regex.test(tags[tagKey]);
-                   };
-               }
-           };
-       };

 
 

-       var buildLineKeys = function() {
-           return {
-               highway: {
-                   rest_area: true,
-                   services: true
-               },
-               railway: {
-                   roundhouse: true,
-                   station: true,
-                   traverser: true,
-                   turntable: true,
-                   wash: true
-               }
-           };
-       };
+         function rebuildIndex() {
+           _wp = whichPolygon_1({
+             features: Object.values(_resolvedFeatures)
+           });
+         } //
+         // `mergeCustomGeoJSON`
+         //  Accepts an FeatureCollection-like object containing custom locations
+         //  Each feature must have a filename-like `id`, for example: `something.geojson`
+         //
+         //  {
+         //    "type": "FeatureCollection"
+         //    "features": [
+         //      {
+         //        "type": "Feature",
+         //        "id": "philly_metro.geojson",
+         //        "properties": { … },
+         //        "geometry": { … }
+         //      }
+         //    ]
+         //  }
+         //

 
 

-       var serviceMapRules = {
-           init: function() {
-               this._ruleChecks  = buildRuleChecks();
-               this._validationRules = [];
-               this._areaKeys = osmAreaKeys;
-               this._lineKeys = buildLineKeys();
-           },

 
 

-           // list of rules only relevant to tag checks...
-           filterRuleChecks: function(selector) {
-               var _ruleChecks = this._ruleChecks;
-               return Object.keys(selector).reduce(function(rules, key) {
-                   if (['geometry', 'error', 'warning'].indexOf(key) === -1) {
-                       rules.push(_ruleChecks[key](selector[key]));
-                   }
-                   return rules;
-               }, []);
-           },
+         _this.mergeCustomGeoJSON = function (fc) {
+           if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
+             fc.features.forEach(function (feature) {
+               feature.properties = feature.properties || {};
+               var props = feature.properties; // Get `id` from either `id` or `properties`

 
 

-           // builds tagMap from mapcss-parse selector object...
-           buildTagMap: function(selector) {
-               var getRegexValues = function(regexes) {
-                   return regexes.map(function(regex) {
-                       return regex.replace(/\$|\^/g, '');
-                   });
-               };
+               var id = feature.id || props.id;
+               if (!id || !/^\S+\.geojson$/i.test(id)) return; // Ensure `id` exists and is lowercase

 
 

-               var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
-                   var values;
-                   var isRegex = /regex/gi.test(key);
-                   var isEqual = /equals/gi.test(key);
+               id = id.toLowerCase();
+               feature.id = id;
+               props.id = id; // Ensure `area` property exists

 
 

-                   if (isRegex || isEqual) {
-                       Object.keys(selector[key]).forEach(function(selectorKey) {
-                           values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
+               if (!props.area) {
+                 var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²

 
 

-                           if (expectedTags.hasOwnProperty(selectorKey)) {
-                               values = values.concat(expectedTags[selectorKey]);
-                           }
+                 props.area = Number(area.toFixed(2));
+               }

 
 

-                           expectedTags[selectorKey] = values;
-                       });
+               _loco._cache[id] = feature;
+             });
+           }
+         }; //
+         // `mergeLocationSets`
+         //  Accepts an Array of Objects containing `locationSet` properties.
+         //  The locationSets will be resolved and indexed in the background.
+         //  [
+         //   { id: 'preset1', locationSet: {…} },
+         //   { id: 'preset2', locationSet: {…} },
+         //   { id: 'preset3', locationSet: {…} },
+         //   …
+         //  ]
+         //  After resolving and indexing, the Objects will be decorated with a
+         //  `locationSetID` property.
+         //  [
+         //   { id: 'preset1', locationSet: {…}, locationSetID: '+[Q2]' },
+         //   { id: 'preset2', locationSet: {…}, locationSetID: '+[Q30]' },
+         //   { id: 'preset3', locationSet: {…}, locationSetID: '+[Q2]' },
+         //   …
+         //  ]
+         //
+         //  Returns a Promise fulfilled when the resolving/indexing has been completed
+         //  This will take some seconds but happen in the background during browser idle time.
+         //

 
 

-                   } else if (/(greater|less)Than(Equal)?|presence/g.test(key)) {
-                       var tagKey = /presence/.test(key) ? selector[key] : Object.keys(selector[key])[0];

 
 

-                       values = [selector[key][tagKey]];
+         _this.mergeLocationSets = function (objects) {
+           if (!Array.isArray(objects)) return Promise.reject('nothing to do'); // Resolve all locationSets -> geojson, processing data in chunks
+           //
+           // Because this will happen during idle callbacks, we want to choose a chunk size
+           // that won't make the browser stutter too badly.  LocationSets that are a simple
+           // country coder include will resolve instantly, but ones that involve complex
+           // include/exclude operations will take some milliseconds longer.
+           //
+           // Some discussion and performance results on these tickets:
+           // https://github.com/ideditor/location-conflation/issues/26
+           // https://github.com/osmlab/name-suggestion-index/issues/4784#issuecomment-742003434

 
 

-                       if (expectedTags.hasOwnProperty(tagKey)) {
-                           values = values.concat(expectedTags[tagKey]);
-                       }
+           _queue = _queue.concat(utilArrayChunk(objects, 200));

 
 

-                       expectedTags[tagKey] = values;
-                   }
+           if (!_inProcess) {
+             _inProcess = processQueue().then(function () {
+               rebuildIndex();
+               _inProcess = null;
+               return objects;
+             });
+           }

 
 

-                   return expectedTags;
-               }, {});
+           return _inProcess;
+         }; //
+         // `locationSetID`
+         // Returns a locationSetID for a given locationSet (fallback to `+[Q2]`, world)
+         // (The locationset doesn't necessarily need to be resolved to compute its `id`)
+         //
+         // Arguments
+         //   `locationSet`: A locationSet, e.g. `{ include: ['us'] }`
+         // Returns
+         //   The locationSetID, e.g. `+[Q30]`
+         //

 
 

-               return tagMap;
-           },

 
 

-           // inspired by osmWay#isArea()
-           inferGeometry: function(tagMap) {
-               var _lineKeys = this._lineKeys;
-               var _areaKeys = this._areaKeys;
+         _this.locationSetID = function (locationSet) {
+           var locationSetID;

 
 

-               var keyValueDoesNotImplyArea = function(key) {
-                   return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
-               };
-               var keyValueImpliesLine = function(key) {
-                   return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
-               };
+           try {
+             locationSetID = _loco.validateLocationSet(locationSet).id;
+           } catch (err) {
+             locationSetID = '+[Q2]'; // the world
+           }

 
 

-               if (tagMap.hasOwnProperty('area')) {
-                   if (tagMap.area.indexOf('yes') > -1) {
-                       return 'area';
-                   }
-                   if (tagMap.area.indexOf('no') > -1) {
-                       return 'line';
-                   }
-               }
+           return locationSetID;
+         }; //
+         // `feature`
+         // Returns the resolved GeoJSON feature for a given locationSetID (fallback to 'world')
+         //
+         // Arguments
+         //   `locationSetID`: id of the form like `+[Q30]`  (United States)
+         // Returns
+         //   A GeoJSON feature:
+         //   {
+         //     type: 'Feature',
+         //     id: '+[Q30]',
+         //     properties: { id: '+[Q30]', area: 21817019.17, … },
+         //     geometry: { … }
+         //   }
+
+
+         _this.feature = function (locationSetID) {
+           return _resolvedFeatures[locationSetID] || _resolvedFeatures['+[Q2]'];
+         }; //
+         // `locationsAt`
+         // Find all the resolved locationSets valid at the given location.
+         // Results include the area (in km²) to facilitate sorting.
+         //
+         // Arguments
+         //   `loc`: the [lon,lat] location to query, e.g. `[-74.4813, 40.7967]`
+         // Returns
+         //   Object of locationSetIDs to areas (in km²)
+         //   {
+         //     "+[Q2]": 511207893.3958111,
+         //     "+[Q30]": 21817019.17,
+         //     "+[new_jersey.geojson]": 22390.77,
+         //     …
+         //   }
+         //

 
 

-               for (var key in tagMap) {
-                   if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
-                       return 'area';
-                   }
-                   if (key in _lineKeys && keyValueImpliesLine(key)) {
-                       return 'area';
-                   }
-               }

 
 

-               return 'line';
-           },
+         _this.locationsAt = function (loc) {
+           var result = {};
+           (_wp(loc, true) || []).forEach(function (prop) {
+             return result[prop.id] = prop.area;
+           });
+           return result;
+         }; //
+         // `query`
+         // Execute a query directly against which-polygon
+         // https://github.com/mapbox/which-polygon
+         //
+         // Arguments
+         //   `loc`: the [lon,lat] location to query,
+         //   `multi`: `true` to return all results, `false` to return first result
+         // Returns
+         //   Array of GeoJSON *properties* for the locationSet features that exist at `loc`
+         //

 
 

-           // adds from mapcss-parse selector check...
-           addRule: function(selector) {
-               var rule = {
-                   // checks relevant to mapcss-selector
-                   checks: this.filterRuleChecks(selector),
-                   // true if all conditions for a tag error are true..
-                   matches: function(entity) {
-                       return this.checks.every(function(check) {
-                           return check(entity.tags);
-                       });
-                   },
-                   // borrowed from Way#isArea()
-                   inferredGeometry: this.inferGeometry(this.buildTagMap(selector), this._areaKeys),
-                   geometryMatches: function(entity, graph) {
-                       if (entity.type === 'node' || entity.type === 'relation') {
-                           return selector.geometry === entity.type;
-                       } else if (entity.type === 'way') {
-                           return this.inferredGeometry === entity.geometry(graph);
-                       }
-                   },
-                   // when geometries match and tag matches are present, return a warning...
-                   findIssues: function (entity, graph, issues) {
-                       if (this.geometryMatches(entity, graph) && this.matches(entity)) {
-                           var severity = Object.keys(selector).indexOf('error') > -1
-                                   ? 'error'
-                                   : 'warning';
-                           var message = selector[severity];
-                           issues.push(new validationIssue({
-                               type: 'maprules',
-                               severity: severity,
-                               message: function() {
-                                   return message;
-                               },
-                               entityIds: [entity.id]
-                           }));
-                       }
-                   }
-               };
-               this._validationRules.push(rule);
-           },

 
 

-           clearRules: function() { this._validationRules = []; },
+         _this.query = function (loc, multi) {
+           return _wp(loc, multi);
+         }; // Direct access to the location-conflation resolver

 
 

-           // returns validationRules...
-           validationRules: function() { return this._validationRules; },

 
 

-           // returns ruleChecks
-           ruleChecks: function() { return this._ruleChecks; }
-       };
+         _this.loco = function () {
+           return _loco;
+         }; // Direct access to the which-polygon index

 
 

-       var apibase$1 = 'https://nominatim.openstreetmap.org/';
-       var _inflight = {};
-       var _nominatimCache;

 
 

+         _this.wp = function () {
+           return _wp;
+         };

 
 

-       var serviceNominatim = {
+         return _this;
+       }

 
 

-           init: function() {
-               _inflight = {};
-               _nominatimCache = new RBush();
-           },
+       var $$a = _export;
+       var $findIndex = arrayIteration.findIndex;
+       var addToUnscopables = addToUnscopables$5;

 
 

-           reset: function() {
-               Object.values(_inflight).forEach(function(controller) { controller.abort(); });
-               _inflight = {};
-               _nominatimCache = new RBush();
-           },
+       var FIND_INDEX = 'findIndex';
+       var SKIPS_HOLES = true;

 
 

+       // Shouldn't skip holes
+       if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES = false; });

 
 

-           countryCode: function (location, callback) {
-               this.reverse(location, function(err, result) {
-                   if (err) {
-                       return callback(err);
-                   } else if (result.address) {
-                       return callback(null, result.address.country_code);
-                   } else {
-                       return callback('Unable to geocode', null);
-                   }
-               });
-           },
+       // `Array.prototype.findIndex` method
+       // https://tc39.es/ecma262/#sec-array.prototype.findindex
+       $$a({ target: 'Array', proto: true, forced: SKIPS_HOLES }, {
+         findIndex: function findIndex(callbackfn /* , that = undefined */) {
+           return $findIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });

 
 

+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables(FIND_INDEX);

 
 

-           reverse: function (loc, callback) {
-               var cached = _nominatimCache.search(
-                   { minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1] }
-               );
+       var isRegExp = isRegexp;

 
 

-               if (cached.length > 0) {
-                   if (callback) { callback(null, cached[0].data); }
-                   return;
-               }
+       var notARegexp = function (it) {
+         if (isRegExp(it)) {
+           throw TypeError("The method doesn't accept regular expressions");
+         } return it;
+       };

 
 

-               var params = { zoom: 13, format: 'json', addressdetails: 1, lat: loc[1], lon: loc[0] };
-               var url = apibase$1 + 'reverse?' + utilQsString(params);
+       var wellKnownSymbol = wellKnownSymbol$s;

 
 

-               if (_inflight[url]) { return; }
-               var controller = new AbortController();
-               _inflight[url] = controller;
+       var MATCH = wellKnownSymbol('match');

 
 

-               d3_json(url, { signal: controller.signal })
-                   .then(function(result) {
-                       delete _inflight[url];
-                       if (result && result.error) {
-                           throw new Error(result.error);
-                       }
-                       var extent = geoExtent(loc).padByMeters(200);
-                       _nominatimCache.insert(Object.assign(extent.bbox(), {data: result}));
-                       if (callback) { callback(null, result); }
-                   })
-                   .catch(function(err) {
-                       delete _inflight[url];
-                       if (err.name === 'AbortError') { return; }
-                       if (callback) { callback(err.message); }
-                   });
-           },
+       var correctIsRegexpLogic = function (METHOD_NAME) {
+         var regexp = /./;
+         try {
+           '/./'[METHOD_NAME](regexp);
+         } catch (error1) {
+           try {
+             regexp[MATCH] = false;
+             return '/./'[METHOD_NAME](regexp);
+           } catch (error2) { /* empty */ }
+         } return false;
+       };

 
 

+       var $$9 = _export;
+       var notARegExp$2 = notARegexp;
+       var requireObjectCoercible$3 = requireObjectCoercible$e;
+       var correctIsRegExpLogic$2 = correctIsRegexpLogic;

 
 

-           search: function (val, callback) {
-               var searchVal = encodeURIComponent(val);
-               var url = apibase$1 + 'search/' + searchVal + '?limit=10&format=json';
+       // `String.prototype.includes` method
+       // https://tc39.es/ecma262/#sec-string.prototype.includes
+       $$9({ target: 'String', proto: true, forced: !correctIsRegExpLogic$2('includes') }, {
+         includes: function includes(searchString /* , position = 0 */) {
+           return !!~String(requireObjectCoercible$3(this))
+             .indexOf(notARegExp$2(searchString), arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });

 
 

-               if (_inflight[url]) { return; }
-               var controller = new AbortController();
-               _inflight[url] = controller;
+       var _mainLocalizer = coreLocalizer(); // singleton

 
 

-               d3_json(url, { signal: controller.signal })
-                   .then(function(result) {
-                       delete _inflight[url];
-                       if (result && result.error) {
-                           throw new Error(result.error);
-                       }
-                       if (callback) { callback(null, result); }
-                   })
-                   .catch(function(err) {
-                       delete _inflight[url];
-                       if (err.name === 'AbortError') { return; }
-                       if (callback) { callback(err.message); }
-                   });
-           }

 
 

-       };
+       var _t = _mainLocalizer.t;
+       // coreLocalizer manages language and locale parameters including translated strings
+       //

 
 

-       var apibase$2 = 'https://openstreetcam.org';
-       var maxResults$1 = 1000;
-       var tileZoom$1 = 14;
-       var tiler$4 = utilTiler().zoomExtent([tileZoom$1, tileZoom$1]).skipNullIsland(true);
-       var dispatch$5 = dispatch('loadedImages');
-       var imgZoom = d3_zoom()
-           .extent([[0, 0], [320, 240]])
-           .translateExtent([[0, 0], [320, 240]])
-           .scaleExtent([1, 15]);
-       var _oscCache;
-       var _oscSelectedImage;
+       function coreLocalizer() {
+         var localizer = {};
+         var _dataLanguages = {}; // `_dataLocales` is an object containing all _supported_ locale codes -> language info.
+         // * `rtl` - right-to-left or left-to-right text direction
+         // * `pct` - the percent of strings translated; 1 = 100%, full coverage
+         //
+         // {
+         // en: { rtl: false, pct: {…} },
+         // de: { rtl: false, pct: {…} },
+         // …
+         // }

 
 

+         var _dataLocales = {}; // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
+         // {
+         // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+         // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+         // …
+         // }

 
 

-       function abortRequest$4(controller) {
-           controller.abort();
-       }
+         var _localeStrings = {}; // the current locale

 
 

+         var _localeCode = 'en-US'; // `_localeCodes` must contain `_localeCode` first, optionally followed by fallbacks

 
 

-       function maxPageAtZoom$1(z) {
-           if (z < 15)   { return 2; }
-           if (z === 15) { return 5; }
-           if (z === 16) { return 10; }
-           if (z === 17) { return 20; }
-           if (z === 18) { return 40; }
-           if (z > 18)   { return 80; }
-       }
+         var _localeCodes = ['en-US', 'en'];
+         var _languageCode = 'en';
+         var _textDirection = 'ltr';
+         var _usesMetric = false;
+         var _languageNames = {};
+         var _scriptNames = {}; // getters for the current locale parameters

 
 

+         localizer.localeCode = function () {
+           return _localeCode;
+         };

 
 

-       function loadTiles$1(which, url, projection) {
-           var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
-           var tiles = tiler$4.getTiles(projection);
+         localizer.localeCodes = function () {
+           return _localeCodes;
+         };

 
 

-           // abort inflight requests that are no longer needed
-           var cache = _oscCache[which];
-           Object.keys(cache.inflight).forEach(function(k) {
-               var wanted = tiles.find(function(tile) { return k.indexOf(tile.id + ',') === 0; });
-               if (!wanted) {
-                   abortRequest$4(cache.inflight[k]);
-                   delete cache.inflight[k];
-               }
-           });
+         localizer.languageCode = function () {
+           return _languageCode;
+         };

 
 

-           tiles.forEach(function(tile) {
-               loadNextTilePage$1(which, currZoom, url, tile);
-           });
-       }
+         localizer.textDirection = function () {
+           return _textDirection;
+         };

 
 

+         localizer.usesMetric = function () {
+           return _usesMetric;
+         };

 
 

-       function loadNextTilePage$1(which, currZoom, url, tile) {
-           var cache = _oscCache[which];
-           var bbox = tile.extent.bbox();
-           var maxPages = maxPageAtZoom$1(currZoom);
-           var nextPage = cache.nextPage[tile.id] || 1;
-           var params = utilQsString({
-               ipp: maxResults$1,
-               page: nextPage,
-               // client_id: clientId,
-               bbTopLeft: [bbox.maxY, bbox.minX].join(','),
-               bbBottomRight: [bbox.minY, bbox.maxX].join(',')
-           }, true);
+         localizer.languageNames = function () {
+           return _languageNames;
+         };

 
 

-           if (nextPage > maxPages) { return; }
+         localizer.scriptNames = function () {
+           return _scriptNames;
+         }; // The client app may want to manually set the locale, regardless of the
+         // settings provided by the browser

 
 

-           var id = tile.id + ',' + String(nextPage);
-           if (cache.loaded[id] || cache.inflight[id]) { return; }

 
 

-           var controller = new AbortController();
-           cache.inflight[id] = controller;
+         var _preferredLocaleCodes = [];

 
 

-           var options = {
-               method: 'POST',
-               signal: controller.signal,
-               body: params,
-               headers: { 'Content-Type': 'application/x-www-form-urlencoded' }
-           };
+         localizer.preferredLocaleCodes = function (codes) {
+           if (!arguments.length) return _preferredLocaleCodes;

 
 

-           d3_json(url, options)
-               .then(function(data) {
-                   cache.loaded[id] = true;
-                   delete cache.inflight[id];
-                   if (!data || !data.currentPageItems || !data.currentPageItems.length) {
-                       throw new Error('No Data');
-                   }
+           if (typeof codes === 'string') {
+             // be generous and accept delimited strings as input
+             _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
+           } else {
+             _preferredLocaleCodes = codes;
+           }

 
 

-                   var features = data.currentPageItems.map(function(item) {
-                       var loc = [+item.lng, +item.lat];
-                       var d;
-
-                       if (which === 'images') {
-                           d = {
-                               loc: loc,
-                               key: item.id,
-                               ca: +item.heading,
-                               captured_at: (item.shot_date || item.date_added),
-                               captured_by: item.username,
-                               imagePath: item.lth_name,
-                               sequence_id: item.sequence_id,
-                               sequence_index: +item.sequence_index
-                           };
-
-                           // cache sequence info
-                           var seq = _oscCache.sequences[d.sequence_id];
-                           if (!seq) {
-                               seq = { rotation: 0, images: [] };
-                               _oscCache.sequences[d.sequence_id] = seq;
-                           }
-                           seq.images[d.sequence_index] = d;
-                       }
+           return localizer;
+         };

 
 

-                       return {
-                           minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-                       };
-                   });
+         var _loadPromise;

 
 

-                   cache.rtree.load(features);
+         localizer.ensureLoaded = function () {
+           if (_loadPromise) return _loadPromise;
+           var filesToFetch = ['languages', // load the list of languages
+           'locales' // load the list of supported locales
+           ];
+           var localeDirs = {
+             general: 'locales',
+             tagging: 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/translations'
+           };
+           var fileMap = _mainFileFetcher.fileMap();

 
 

-                   if (data.currentPageItems.length === maxResults$1) {  // more pages to load
-                       cache.nextPage[tile.id] = nextPage + 1;
-                       loadNextTilePage$1(which, currZoom, url, tile);
-                   } else {
-                       cache.nextPage[tile.id] = Infinity;     // no more pages to load
-                   }
+           for (var scopeId in localeDirs) {
+             var key = "locales_index_".concat(scopeId);

 
 

-                   if (which === 'images') {
-                       dispatch$5.call('loadedImages');
-                   }
-               })
-               .catch(function() {
-                   cache.loaded[id] = true;
-                   delete cache.inflight[id];
-               });
-       }
+             if (!fileMap[key]) {
+               fileMap[key] = localeDirs[scopeId] + '/index.min.json';
+             }

 
 

+             filesToFetch.push(key);
+           }

 
 

-       // partition viewport into higher zoom tiles
-       function partitionViewport$1(projection) {
-           var z = geoScaleToZoom(projection.scale());
-           var z2 = (Math.ceil(z * 2) / 2) + 2.5;   // round to next 0.5 and add 2.5
-           var tiler = utilTiler().zoomExtent([z2, z2]);
+           return _loadPromise = Promise.all(filesToFetch.map(function (key) {
+             return _mainFileFetcher.get(key);
+           })).then(function (results) {
+             _dataLanguages = results[0];
+             _dataLocales = results[1];
+             var indexes = results.slice(2);

 
 

-           return tiler.getTiles(projection)
-               .map(function(tile) { return tile.extent; });
-       }
+             var requestedLocales = (_preferredLocaleCodes || []).concat(utilDetect().browserLocales) // List of locales preferred by the browser in priority order.
+             .concat(['en']); // fallback to English since it's the only guaranteed complete language

 
 
 
 

-       // no more than `limit` results per partition.
-       function searchLimited$1(limit, projection, rtree) {
-           limit = limit || 5;
+             _localeCodes = localesToUseFrom(requestedLocales);
+             _localeCode = _localeCodes[0]; // Run iD in the highest-priority locale; the rest are fallbacks

 
 

-           return partitionViewport$1(projection)
-               .reduce(function(result, extent) {
-                   var found = rtree.search(extent.bbox())
-                       .slice(0, limit)
-                       .map(function(d) { return d.data; });
+             var loadStringsPromises = [];
+             indexes.forEach(function (index, i) {
+               // Will always return the index for `en` if nothing else
+               var fullCoverageIndex = _localeCodes.findIndex(function (locale) {
+                 return index[locale] && index[locale].pct === 1;
+               }); // We only need to load locales up until we find one with full coverage

 
 

-                   return (found.length ? result.concat(found) : result);
-               }, []);
-       }

 
 

+               _localeCodes.slice(0, fullCoverageIndex + 1).forEach(function (code) {
+                 var scopeId = Object.keys(localeDirs)[i];
+                 var directory = Object.values(localeDirs)[i];
+                 if (index[code]) loadStringsPromises.push(localizer.loadLocale(code, scopeId, directory));
+               });
+             });
+             return Promise.all(loadStringsPromises);
+           }).then(function () {
+             updateForCurrentLocale();
+           })["catch"](function (err) {
+             return console.error(err);
+           }); // eslint-disable-line
+         }; // Returns the locales from `requestedLocales` supported by iD that we should use
+
+
+         function localesToUseFrom(requestedLocales) {
+           var supportedLocales = _dataLocales;
+           var toUse = [];
+
+           for (var i in requestedLocales) {
+             var locale = requestedLocales[i];
+             if (supportedLocales[locale]) toUse.push(locale);
+
+             if (locale.includes('-')) {
+               // Full locale ('es-ES'), add fallback to the base ('es')
+               var langPart = locale.split('-')[0];
+               if (supportedLocales[langPart]) toUse.push(langPart);
+             }
+           } // remove duplicates

 
 

-       var serviceOpenstreetcam = {

 
 

-           init: function() {
-               if (!_oscCache) {
-                   this.reset();
-               }
+           return utilArrayUniq(toUse);
+         }

 
 

-               this.event = utilRebind(this, dispatch$5, 'on');
-           },
+         function updateForCurrentLocale() {
+           if (!_localeCode) return;
+           _languageCode = _localeCode.split('-')[0];
+           var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
+           var hash = utilStringQs(window.location.hash);

 
 

-           reset: function() {
-               if (_oscCache) {
-                   Object.values(_oscCache.images.inflight).forEach(abortRequest$4);
-               }
+           if (hash.rtl === 'true') {
+             _textDirection = 'rtl';
+           } else if (hash.rtl === 'false') {
+             _textDirection = 'ltr';
+           } else {
+             _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
+           }

 
 

-               _oscCache = {
-                   images: { inflight: {}, loaded: {}, nextPage: {}, rtree: new RBush() },
-                   sequences: {}
-               };
+           var locale = _localeCode;
+           if (locale.toLowerCase() === 'en-us') locale = 'en';
+           _languageNames = _localeStrings.general[locale].languageNames;
+           _scriptNames = _localeStrings.general[locale].scriptNames;
+           _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
+         }
+         /* Locales */
+         // Returns a Promise to load the strings for the requested locale

 
 

-               _oscSelectedImage = null;
-           },

 
 

+         localizer.loadLocale = function (locale, scopeId, directory) {
+           // US English is the default
+           if (locale.toLowerCase() === 'en-us') locale = 'en';

 
 

-           images: function(projection) {
-               var limit = 5;
-               return searchLimited$1(limit, projection, _oscCache.images.rtree);
-           },
+           if (_localeStrings[scopeId] && _localeStrings[scopeId][locale]) {
+             // already loaded
+             return Promise.resolve(locale);
+           }

 
 

+           var fileMap = _mainFileFetcher.fileMap();
+           var key = "locale_".concat(scopeId, "_").concat(locale);

 
 

-           sequences: function(projection) {
-               var viewport = projection.clipExtent();
-               var min = [viewport[0][0], viewport[1][1]];
-               var max = [viewport[1][0], viewport[0][1]];
-               var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-               var sequenceKeys = {};
-
-               // all sequences for images in viewport
-               _oscCache.images.rtree.search(bbox)
-                   .forEach(function(d) { sequenceKeys[d.data.sequence_id] = true; });
-
-               // make linestrings from those sequences
-               var lineStrings = [];
-               Object.keys(sequenceKeys)
-                   .forEach(function(sequenceKey) {
-                       var seq = _oscCache.sequences[sequenceKey];
-                       var images = seq && seq.images;
-                       if (images) {
-                           lineStrings.push({
-                               type: 'LineString',
-                               coordinates: images.map(function (d) { return d.loc; }).filter(Boolean),
-                               properties: { key: sequenceKey }
-                           });
-                       }
-                   });
-               return lineStrings;
-           },
+           if (!fileMap[key]) {
+             fileMap[key] = "".concat(directory, "/").concat(locale, ".min.json");
+           }

 
 

+           return _mainFileFetcher.get(key).then(function (d) {
+             if (!_localeStrings[scopeId]) _localeStrings[scopeId] = {};
+             _localeStrings[scopeId][locale] = d[locale];
+             return locale;
+           });
+         };

 
 

-           loadImages: function(projection) {
-               var url = apibase$2 + '/1.0/list/nearby-photos/';
-               loadTiles$1('images', url, projection);
-           },
+         localizer.pluralRule = function (number) {
+           return pluralRule(number, _localeCode);
+         }; // Returns the plural rule for the given `number` with the given `localeCode`.
+         // One of: `zero`, `one`, `two`, `few`, `many`, `other`

 
 
 
 

-           loadViewer: function(context) {
-               var that = this;
+         function pluralRule(number, localeCode) {
+           // modern browsers have this functionality built-in
+           var rules = 'Intl' in window && Intl.PluralRules && new Intl.PluralRules(localeCode);

 
 

-               // add osc-wrapper
-               var wrap = context.container().select('.photoviewer').selectAll('.osc-wrapper')
-                   .data([0]);
+           if (rules) {
+             return rules.select(number);
+           } // fallback to basic one/other, as in English

 
 

-               var wrapEnter = wrap.enter()
-                   .append('div')
-                   .attr('class', 'photo-wrapper osc-wrapper')
-                   .classed('hide', true)
-                   .call(imgZoom.on('zoom', zoomPan))
-                   .on('dblclick.zoom', null);

 
 

-               wrapEnter
-                   .append('div')
-                   .attr('class', 'photo-attribution fillD');
+           if (number === 1) return 'one';
+           return 'other';
+         }
+         /**
+         * Try to find that string in `locale` or the current `_localeCode` matching
+         * the given `stringId`. If no string can be found in the requested locale,
+         * we'll recurse down all the `_localeCodes` until one is found.
+         *
+         * @param  {string}   stringId      string identifier
+         * @param  {object?}  replacements  token replacements and default string
+         * @param  {string?}  locale        locale to use (defaults to currentLocale)
+         * @return {string?}  localized string
+         */

 
 

-               var controlsEnter = wrapEnter
-                   .append('div')
-                   .attr('class', 'photo-controls-wrap')
-                   .append('div')
-                   .attr('class', 'photo-controls');

 
 

-               controlsEnter
-                   .append('button')
-                   .on('click.back', step(-1))
-                   .text('◄');
+         localizer.tInfo = function (origStringId, replacements, locale) {
+           var stringId = origStringId.trim();
+           var scopeId = 'general';

 
 

-               controlsEnter
-                   .append('button')
-                   .on('click.rotate-ccw', rotate(-90))
-                   .text('⤿');
+           if (stringId[0] === '_') {
+             var split = stringId.split('.');
+             scopeId = split[0].slice(1);
+             stringId = split.slice(1).join('.');
+           }

 
 

-               controlsEnter
-                   .append('button')
-                   .on('click.rotate-cw', rotate(90))
-                   .text('⤾');
+           locale = locale || _localeCode;
+           var path = stringId.split('.').map(function (s) {
+             return s.replace(/<TX_DOT>/g, '.');
+           }).reverse();
+           var stringsKey = locale; // US English is the default

 
 

-               controlsEnter
-                   .append('button')
-                   .on('click.forward', step(1))
-                   .text('►');
+           if (stringsKey.toLowerCase() === 'en-us') stringsKey = 'en';
+           var result = _localeStrings && _localeStrings[scopeId] && _localeStrings[scopeId][stringsKey];

 
 

-               wrapEnter
-                   .append('div')
-                   .attr('class', 'osc-image-wrap');
+           while (result !== undefined && path.length) {
+             result = result[path.pop()];
+           }

 
 

+           if (result !== undefined) {
+             if (replacements) {
+               if (_typeof(result) === 'object' && Object.keys(result).length) {
+                 // If plural forms are provided, dig one level deeper based on the
+                 // first numeric token replacement provided.
+                 var number = Object.values(replacements).find(function (value) {
+                   return typeof value === 'number';
+                 });

 
 

-               // Register viewer resize handler
-               context.ui().photoviewer.on('resize.openstreetcam', function(dimensions) {
-                   imgZoom = d3_zoom()
-                       .extent([[0, 0], dimensions])
-                       .translateExtent([[0, 0], dimensions])
-                       .scaleExtent([1, 15])
-                       .on('zoom', zoomPan);
-               });
+                 if (number !== undefined) {
+                   var rule = pluralRule(number, locale);
+
+                   if (result[rule]) {
+                     result = result[rule];
+                   } else {
+                     // We're pretty sure this should be a plural but no string
+                     // could be found for the given rule. Just pick the first
+                     // string and hope it makes sense.
+                     result = Object.values(result)[0];
+                   }
+                 }
+               }
+
+               if (typeof result === 'string') {
+                 for (var key in replacements) {
+                   var value = replacements[key];

 
 

+                   if (typeof value === 'number') {
+                     if (value.toLocaleString) {
+                       // format numbers for the locale
+                       value = value.toLocaleString(locale, {
+                         style: 'decimal',
+                         useGrouping: true,
+                         minimumFractionDigits: 0
+                       });
+                     } else {
+                       value = value.toString();
+                     }
+                   }

 
 

-               function zoomPan() {
-                   var t = event.transform;
-                   context.container().select('.photoviewer .osc-image-wrap')
-                       .call(utilSetTransform, t.x, t.y, t.k);
+                   var token = "{".concat(key, "}");
+                   var regex = new RegExp(token, 'g');
+                   result = result.replace(regex, value);
+                 }

                }
                }

+             }

 
 

+             if (typeof result === 'string') {
+               // found a localized string!
+               return {
+                 text: result,
+                 locale: locale
+               };
+             }
+           } // no localized string found...
+           // attempt to fallback to a lower-priority language

 
 

-               function rotate(deg) {
-                   return function() {
-                       if (!_oscSelectedImage) { return; }
-                       var sequenceKey = _oscSelectedImage.sequence_id;
-                       var sequence = _oscCache.sequences[sequenceKey];
-                       if (!sequence) { return; }

 
 

-                       var r = sequence.rotation || 0;
-                       r += deg;
+           var index = _localeCodes.indexOf(locale);

 
 

-                       if (r > 180) { r -= 360; }
-                       if (r < -180) { r += 360; }
-                       sequence.rotation = r;
+           if (index >= 0 && index < _localeCodes.length - 1) {
+             // eventually this will be 'en' or another locale with 100% coverage
+             var fallback = _localeCodes[index + 1];
+             return localizer.tInfo(origStringId, replacements, fallback);
+           }

 
 

-                       var wrap = context.container().select('.photoviewer .osc-wrapper');
+           if (replacements && 'default' in replacements) {
+             // Fallback to a default value if one is specified in `replacements`
+             return {
+               text: replacements["default"],
+               locale: null
+             };
+           }

 
 

-                       wrap
-                           .transition()
-                           .duration(100)
-                           .call(imgZoom.transform, identity$2);
+           var missing = "Missing ".concat(locale, " translation: ").concat(origStringId);
+           if (typeof console !== 'undefined') console.error(missing); // eslint-disable-line

 
 

-                       wrap.selectAll('.osc-image')
-                           .transition()
-                           .duration(100)
-                           .style('transform', 'rotate(' + r + 'deg)');
-                   };
-               }
+           return {
+             text: missing,
+             locale: 'en'
+           };
+         };

 
 

-               function step(stepBy) {
-                   return function() {
-                       if (!_oscSelectedImage) { return; }
-                       var sequenceKey = _oscSelectedImage.sequence_id;
-                       var sequence = _oscCache.sequences[sequenceKey];
-                       if (!sequence) { return; }
+         localizer.hasTextForStringId = function (stringId) {
+           return !!localizer.tInfo(stringId, {
+             "default": 'nothing found'
+           }).locale;
+         }; // Returns only the localized text, discarding the locale info

 
 

-                       var nextIndex = _oscSelectedImage.sequence_index + stepBy;
-                       var nextImage = sequence.images[nextIndex];
-                       if (!nextImage) { return; }

 
 

-                       context.map().centerEase(nextImage.loc);
+         localizer.t = function (stringId, replacements, locale) {
+           return localizer.tInfo(stringId, replacements, locale).text;
+         }; // Returns the localized text wrapped in an HTML element encoding the locale info

 
 

-                       that
-                           .selectImage(context, nextImage)
-                           .updateViewer(context, nextImage);
-                   };
-               }
-           },

 
 

+         localizer.t.html = function (stringId, replacements, locale) {
+           var info = localizer.tInfo(stringId, replacements, locale); // text may be empty or undefined if `replacements.default` is

 
 

-           showViewer: function(context) {
-               var viewer = context.container().select('.photoviewer')
-                   .classed('hide', false);
+           return info.text ? localizer.htmlForLocalizedText(info.text, info.locale) : '';
+         };

 
 

-               var isHidden = viewer.selectAll('.photo-wrapper.osc-wrapper.hide').size();
+         localizer.htmlForLocalizedText = function (text, localeCode) {
+           return "<span class=\"localized-text\" lang=\"".concat(localeCode || 'unknown', "\">").concat(text, "</span>");
+         };

 
 

-               if (isHidden) {
-                   viewer
-                       .selectAll('.photo-wrapper:not(.osc-wrapper)')
-                       .classed('hide', true);
+         localizer.languageName = function (code, options) {
+           if (_languageNames[code]) {
+             // name in locale language
+             // e.g. "German"
+             return _languageNames[code];
+           } // sometimes we only want the local name

 
 

-                   viewer
-                       .selectAll('.photo-wrapper.osc-wrapper')
-                       .classed('hide', false);
-               }

 
 

-               return this;
-           },
+           if (options && options.localOnly) return null;
+           var langInfo = _dataLanguages[code];

 
 

+           if (langInfo) {
+             if (langInfo.nativeName) {
+               // name in native language
+               // e.g. "Deutsch (de)"
+               return localizer.t('translate.language_and_code', {
+                 language: langInfo.nativeName,
+                 code: code
+               });
+             } else if (langInfo.base && langInfo.script) {
+               var base = langInfo.base; // the code of the language this is based on

 
 

-           hideViewer: function(context) {
-               _oscSelectedImage = null;
+               if (_languageNames[base]) {
+                 // base language name in locale language
+                 var scriptCode = langInfo.script;
+                 var script = _scriptNames[scriptCode] || scriptCode; // e.g. "Serbian (Cyrillic)"

 
 

-               var viewer = context.container().select('.photoviewer');
-               if (!viewer.empty()) { viewer.datum(null); }
+                 return localizer.t('translate.language_and_code', {
+                   language: _languageNames[base],
+                   code: script
+                 });
+               } else if (_dataLanguages[base] && _dataLanguages[base].nativeName) {
+                 // e.g. "српски (sr-Cyrl)"
+                 return localizer.t('translate.language_and_code', {
+                   language: _dataLanguages[base].nativeName,
+                   code: code
+                 });
+               }
+             }
+           }

 
 

-               viewer
-                   .classed('hide', true)
-                   .selectAll('.photo-wrapper')
-                   .classed('hide', true);
+           return code; // if not found, use the code
+         };

 
 

-               context.container().selectAll('.viewfield-group, .sequence, .icon-sign')
-                   .classed('currentView', false);
+         return localizer;
+       }

 
 

-               return this.setStyles(context, null, true);
-           },
+       // `presetCollection` is a wrapper around an `Array` of presets `collection`,
+       // and decorated with some extra methods for searching and matching geometry
+       //

 
 

+       function presetCollection(collection) {
+         var MAXRESULTS = 50;
+         var _this = {};
+         var _memo = {};
+         _this.collection = collection;

 
 

-           updateViewer: function(context, d) {
-               var wrap = context.container().select('.photoviewer .osc-wrapper');
-               var imageWrap = wrap.selectAll('.osc-image-wrap');
-               var attribution = wrap.selectAll('.photo-attribution').html('');
-
-               wrap
-                   .transition()
-                   .duration(100)
-                   .call(imgZoom.transform, identity$2);
-
-               imageWrap
-                   .selectAll('.osc-image')
-                   .remove();
-
-               if (d) {
-                   var sequence = _oscCache.sequences[d.sequence_id];
-                   var r = (sequence && sequence.rotation) || 0;
-
-                   imageWrap
-                       .append('img')
-                       .attr('class', 'osc-image')
-                       .attr('src', apibase$2 + '/' + d.imagePath)
-                       .style('transform', 'rotate(' + r + 'deg)');
-
-                   if (d.captured_by) {
-                       attribution
-                           .append('a')
-                           .attr('class', 'captured_by')
-                           .attr('target', '_blank')
-                           .attr('href', 'https://openstreetcam.org/user/' + encodeURIComponent(d.captured_by))
-                           .text('@' + d.captured_by);
-
-                       attribution
-                           .append('span')
-                           .text('|');
-                   }
+         _this.item = function (id) {
+           if (_memo[id]) return _memo[id];

 
 

-                   if (d.captured_at) {
-                       attribution
-                           .append('span')
-                           .attr('class', 'captured_at')
-                           .text(localeDateString(d.captured_at));
+           var found = _this.collection.find(function (d) {
+             return d.id === id;
+           });

 
 

-                       attribution
-                           .append('span')
-                           .text('|');
-                   }
+           if (found) _memo[id] = found;
+           return found;
+         };

 
 

-                   attribution
-                       .append('a')
-                       .attr('class', 'image-link')
-                       .attr('target', '_blank')
-                       .attr('href', 'https://openstreetcam.org/details/' + d.sequence_id + '/' + d.sequence_index)
-                       .text('openstreetcam.org');
-               }
+         _this.index = function (id) {
+           return _this.collection.findIndex(function (d) {
+             return d.id === id;
+           });
+         };

 
 

-               return this;
+         _this.matchGeometry = function (geometry) {
+           return presetCollection(_this.collection.filter(function (d) {
+             return d.matchGeometry(geometry);
+           }));
+         };

 
 

+         _this.matchAllGeometry = function (geometries) {
+           return presetCollection(_this.collection.filter(function (d) {
+             return d && d.matchAllGeometry(geometries);
+           }));
+         };

 
 

-               function localeDateString(s) {
-                   if (!s) { return null; }
-                   var options = { day: 'numeric', month: 'short', year: 'numeric' };
-                   var d = new Date(s);
-                   if (isNaN(d.getTime())) { return null; }
-                   return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-               }
-           },
+         _this.matchAnyGeometry = function (geometries) {
+           return presetCollection(_this.collection.filter(function (d) {
+             return geometries.some(function (geom) {
+               return d.matchGeometry(geom);
+             });
+           }));
+         };

 
 

+         _this.fallback = function (geometry) {
+           var id = geometry;
+           if (id === 'vertex') id = 'point';
+           return _this.item(id);
+         };

 
 

-           selectImage: function(context, d) {
-               _oscSelectedImage = d;
-               var viewer = context.container().select('.photoviewer');
-               if (!viewer.empty()) { viewer.datum(d); }
+         _this.search = function (value, geometry, loc) {
+           if (!value) return _this; // don't remove diacritical characters since we're assuming the user is being intentional

 
 

-               this.setStyles(context, null, true);
+           value = value.toLowerCase().trim(); // match at name beginning or just after a space (e.g. "office" -> match "Law Office")

 
 

-               context.container().selectAll('.icon-sign')
-                   .classed('currentView', false);
+           function leading(a) {
+             var index = a.indexOf(value);
+             return index === 0 || a[index - 1] === ' ';
+           } // match at name beginning only

 
 

-               return this;
-           },

 
 

+           function leadingStrict(a) {
+             var index = a.indexOf(value);
+             return index === 0;
+           }

 
 

-           getSelectedImage: function() {
-               return _oscSelectedImage;
-           },
+           function sortPresets(nameProp) {
+             return function sortNames(a, b) {
+               var aCompare = a[nameProp]();
+               var bCompare = b[nameProp](); // priority if search string matches preset name exactly - #4325

 
 

+               if (value === aCompare) return -1;
+               if (value === bCompare) return 1; // priority for higher matchScore

 
 

-           getSequenceKeyForImage: function(d) {
-               return d && d.sequence_id;
-           },
+               var i = b.originalScore - a.originalScore;
+               if (i !== 0) return i; // priority if search string appears earlier in preset name

 
 

+               i = aCompare.indexOf(value) - bCompare.indexOf(value);
+               if (i !== 0) return i; // priority for shorter preset names

 
 

-           // Updates the currently highlighted sequence and selected bubble.
-           // Reset is only necessary when interacting with the viewport because
-           // this implicitly changes the currently selected bubble/sequence
-           setStyles: function(context, hovered, reset) {
-               if (reset) {  // reset all layers
-                   context.container().selectAll('.viewfield-group')
-                       .classed('highlighted', false)
-                       .classed('hovered', false)
-                       .classed('currentView', false);
+               return aCompare.length - bCompare.length;
+             };
+           }

 
 

-                   context.container().selectAll('.sequence')
-                       .classed('highlighted', false)
-                       .classed('currentView', false);
-               }
+           var pool = _this.collection;

 
 

-               var hoveredImageKey = hovered && hovered.key;
-               var hoveredSequenceKey = this.getSequenceKeyForImage(hovered);
-               var hoveredSequence = hoveredSequenceKey && _oscCache.sequences[hoveredSequenceKey];
-               var hoveredImageKeys = (hoveredSequence && hoveredSequence.images.map(function (d) { return d.key; })) || [];
+           if (Array.isArray(loc)) {
+             var validLocations = _mainLocations.locationsAt(loc);
+             pool = pool.filter(function (a) {
+               return !a.locationSetID || validLocations[a.locationSetID];
+             });
+           }

 
 

-               var viewer = context.container().select('.photoviewer');
-               var selected = viewer.empty() ? undefined : viewer.datum();
-               var selectedImageKey = selected && selected.key;
-               var selectedSequenceKey = this.getSequenceKeyForImage(selected);
-               var selectedSequence = selectedSequenceKey && _oscCache.sequences[selectedSequenceKey];
-               var selectedImageKeys = (selectedSequence && selectedSequence.images.map(function (d) { return d.key; })) || [];
-
-               // highlight sibling viewfields on either the selected or the hovered sequences
-               var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
-
-               context.container().selectAll('.layer-openstreetcam .viewfield-group')
-                   .classed('highlighted', function(d) { return highlightedImageKeys.indexOf(d.key) !== -1; })
-                   .classed('hovered', function(d) { return d.key === hoveredImageKey; })
-                   .classed('currentView', function(d) { return d.key === selectedImageKey; });
-
-               context.container().selectAll('.layer-openstreetcam .sequence')
-                   .classed('highlighted', function(d) { return d.properties.key === hoveredSequenceKey; })
-                   .classed('currentView', function(d) { return d.properties.key === selectedSequenceKey; });
-
-               // update viewfields if needed
-               context.container().selectAll('.viewfield-group .viewfield')
-                   .attr('d', viewfieldPath);
-
-               function viewfieldPath() {
-                   var d = this.parentNode.__data__;
-                   if (d.pano && d.key !== selectedImageKey) {
-                       return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-                   } else {
-                       return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-                   }
-               }
+           var searchable = pool.filter(function (a) {
+             return a.searchable !== false && a.suggestion !== true;
+           });
+           var suggestions = pool.filter(function (a) {
+             return a.suggestion === true;
+           }); // matches value to preset.name
+
+           var leadingNames = searchable.filter(function (a) {
+             return leading(a.searchName());
+           }).sort(sortPresets('searchName')); // matches value to preset suggestion name
+
+           var leadingSuggestions = suggestions.filter(function (a) {
+             return leadingStrict(a.searchName());
+           }).sort(sortPresets('searchName'));
+           var leadingNamesStripped = searchable.filter(function (a) {
+             return leading(a.searchNameStripped());
+           }).sort(sortPresets('searchNameStripped'));
+           var leadingSuggestionsStripped = suggestions.filter(function (a) {
+             return leadingStrict(a.searchNameStripped());
+           }).sort(sortPresets('searchNameStripped')); // matches value to preset.terms values
+
+           var leadingTerms = searchable.filter(function (a) {
+             return (a.terms() || []).some(leading);
+           });
+           var leadingSuggestionTerms = suggestions.filter(function (a) {
+             return (a.terms() || []).some(leading);
+           }); // matches value to preset.tags values

 
 

-               return this;
-           },
+           var leadingTagValues = searchable.filter(function (a) {
+             return Object.values(a.tags || {}).filter(function (val) {
+               return val !== '*';
+             }).some(leading);
+           }); // finds close matches to value in preset.name

 
 

+           var similarName = searchable.map(function (a) {
+             return {
+               preset: a,
+               dist: utilEditDistance(value, a.searchName())
+             };
+           }).filter(function (a) {
+             return a.dist + Math.min(value.length - a.preset.searchName().length, 0) < 3;
+           }).sort(function (a, b) {
+             return a.dist - b.dist;
+           }).map(function (a) {
+             return a.preset;
+           }); // finds close matches to value to preset suggestion name
+
+           var similarSuggestions = suggestions.map(function (a) {
+             return {
+               preset: a,
+               dist: utilEditDistance(value, a.searchName())
+             };
+           }).filter(function (a) {
+             return a.dist + Math.min(value.length - a.preset.searchName().length, 0) < 1;
+           }).sort(function (a, b) {
+             return a.dist - b.dist;
+           }).map(function (a) {
+             return a.preset;
+           }); // finds close matches to value in preset.terms
+
+           var similarTerms = searchable.filter(function (a) {
+             return (a.terms() || []).some(function (b) {
+               return utilEditDistance(value, b) + Math.min(value.length - b.length, 0) < 3;
+             });
+           });
+           var results = leadingNames.concat(leadingSuggestions, leadingNamesStripped, leadingSuggestionsStripped, leadingTerms, leadingSuggestionTerms, leadingTagValues, similarName, similarSuggestions, similarTerms).slice(0, MAXRESULTS - 1);

 
 

-           cache: function() {
-               return _oscCache;
+           if (geometry) {
+             if (typeof geometry === 'string') {
+               results.push(_this.fallback(geometry));
+             } else {
+               geometry.forEach(function (geom) {
+                 return results.push(_this.fallback(geom));
+               });
+             }

            }
 
            }
 

-       };
+           return presetCollection(utilArrayUniq(results));
+         };

 
 

-       /**
-        * Checks if `value` is the
-        * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
-        * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
-        *
-        * @static
-        * @memberOf _
-        * @since 0.1.0
-        * @category Lang
-        * @param {*} value The value to check.
-        * @returns {boolean} Returns `true` if `value` is an object, else `false`.
-        * @example
-        *
-        * _.isObject({});
-        * // => true
-        *
-        * _.isObject([1, 2, 3]);
-        * // => true
-        *
-        * _.isObject(_.noop);
-        * // => true
-        *
-        * _.isObject(null);
-        * // => false
-        */
-       function isObject$1(value) {
-         var type = typeof value;
-         return value != null && (type == 'object' || type == 'function');
+         return _this;

        }
 
        }
 

-       /** Detect free variable `global` from Node.js. */
-       var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
+       // `presetCategory` builds a `presetCollection` of member presets,
+       // decorated with some extra methods for searching and matching geometry
+       //

 
 

-       /** Detect free variable `self`. */
-       var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
+       function presetCategory(categoryID, category, allPresets) {
+         var _this = Object.assign({}, category); // shallow copy

 
 

-       /** Used as a reference to the global object. */
-       var root$2 = freeGlobal || freeSelf || Function('return this')();

 
 

-       /**
-        * Gets the timestamp of the number of milliseconds that have elapsed since
-        * the Unix epoch (1 January 1970 00:00:00 UTC).
-        *
-        * @static
-        * @memberOf _
-        * @since 2.4.0
-        * @category Date
-        * @returns {number} Returns the timestamp.
-        * @example
-        *
-        * _.defer(function(stamp) {
-        *   console.log(_.now() - stamp);
-        * }, _.now());
-        * // => Logs the number of milliseconds it took for the deferred invocation.
-        */
-       var now$1 = function() {
-         return root$2.Date.now();
-       };
+         var _searchName; // cache

 
 

-       /** Built-in value references. */
-       var Symbol$1 = root$2.Symbol;

 
 

-       /** Used for built-in method references. */
-       var objectProto = Object.prototype;
+         var _searchNameStripped; // cache

 
 

-       /** Used to check objects for own properties. */
-       var hasOwnProperty$2 = objectProto.hasOwnProperty;

 
 

-       /**
-        * Used to resolve the
-        * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-        * of values.
-        */
-       var nativeObjectToString = objectProto.toString;
+         _this.id = categoryID;
+         _this.members = presetCollection((category.members || []).map(function (presetID) {
+           return allPresets[presetID];
+         }).filter(Boolean));
+         _this.geometry = _this.members.collection.reduce(function (acc, preset) {
+           for (var i in preset.geometry) {
+             var geometry = preset.geometry[i];
+
+             if (acc.indexOf(geometry) === -1) {
+               acc.push(geometry);
+             }
+           }
+
+           return acc;
+         }, []);
+
+         _this.matchGeometry = function (geom) {
+           return _this.geometry.indexOf(geom) >= 0;
+         };
+
+         _this.matchAllGeometry = function (geometries) {
+           return _this.members.collection.some(function (preset) {
+             return preset.matchAllGeometry(geometries);
+           });
+         };
+
+         _this.matchScore = function () {
+           return -1;
+         };

 
 

-       /** Built-in value references. */
-       var symToStringTag = Symbol$1 ? Symbol$1.toStringTag : undefined;
+         _this.name = function () {
+           return _t("_tagging.presets.categories.".concat(categoryID, ".name"), {
+             'default': categoryID
+           });
+         };

 
 

-       /**
-        * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
-        *
-        * @private
-        * @param {*} value The value to query.
-        * @returns {string} Returns the raw `toStringTag`.
-        */
-       function getRawTag(value) {
-         var isOwn = hasOwnProperty$2.call(value, symToStringTag),
-             tag = value[symToStringTag];
+         _this.nameLabel = function () {
+           return _t.html("_tagging.presets.categories.".concat(categoryID, ".name"), {
+             'default': categoryID
+           });
+         };

 
 

-         try {
-           value[symToStringTag] = undefined;
-           var unmasked = true;
-         } catch (e) {}
+         _this.terms = function () {
+           return [];
+         };

 
 

-         var result = nativeObjectToString.call(value);
-         if (unmasked) {
-           if (isOwn) {
-             value[symToStringTag] = tag;
-           } else {
-             delete value[symToStringTag];
+         _this.searchName = function () {
+           if (!_searchName) {
+             _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();

            }
            }

-         }
-         return result;
-       }

 
 

-       /** Used for built-in method references. */
-       var objectProto$1 = Object.prototype;
-
-       /**
-        * Used to resolve the
-        * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-        * of values.
-        */
-       var nativeObjectToString$1 = objectProto$1.toString;
+           return _searchName;
+         };

 
 

-       /**
-        * Converts `value` to a string using `Object.prototype.toString`.
-        *
-        * @private
-        * @param {*} value The value to convert.
-        * @returns {string} Returns the converted string.
-        */
-       function objectToString$2(value) {
-         return nativeObjectToString$1.call(value);
-       }
+         _this.searchNameStripped = function () {
+           if (!_searchNameStripped) {
+             _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts

 
 

-       /** `Object#toString` result references. */
-       var nullTag = '[object Null]',
-           undefinedTag = '[object Undefined]';
+             if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics

 
 

-       /** Built-in value references. */
-       var symToStringTag$1 = Symbol$1 ? Symbol$1.toStringTag : undefined;
+             _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
+           }

 
 

-       /**
-        * The base implementation of `getTag` without fallbacks for buggy environments.
-        *
-        * @private
-        * @param {*} value The value to query.
-        * @returns {string} Returns the `toStringTag`.
-        */
-       function baseGetTag(value) {
-         if (value == null) {
-           return value === undefined ? undefinedTag : nullTag;
-         }
-         return (symToStringTag$1 && symToStringTag$1 in Object(value))
-           ? getRawTag(value)
-           : objectToString$2(value);
-       }
+           return _searchNameStripped;
+         };

 
 

-       /**
-        * Checks if `value` is object-like. A value is object-like if it's not `null`
-        * and has a `typeof` result of "object".
-        *
-        * @static
-        * @memberOf _
-        * @since 4.0.0
-        * @category Lang
-        * @param {*} value The value to check.
-        * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
-        * @example
-        *
-        * _.isObjectLike({});
-        * // => true
-        *
-        * _.isObjectLike([1, 2, 3]);
-        * // => true
-        *
-        * _.isObjectLike(_.noop);
-        * // => false
-        *
-        * _.isObjectLike(null);
-        * // => false
-        */
-       function isObjectLike(value) {
-         return value != null && typeof value == 'object';
+         return _this;

        }
 
        }
 

-       /** `Object#toString` result references. */
-       var symbolTag = '[object Symbol]';
+       // `presetField` decorates a given `field` Object
+       // with some extra methods for searching and matching geometry
+       //

 
 

-       /**
-        * Checks if `value` is classified as a `Symbol` primitive or object.
-        *
-        * @static
-        * @memberOf _
-        * @since 4.0.0
-        * @category Lang
-        * @param {*} value The value to check.
-        * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
-        * @example
-        *
-        * _.isSymbol(Symbol.iterator);
-        * // => true
-        *
-        * _.isSymbol('abc');
-        * // => false
-        */
-       function isSymbol$4(value) {
-         return typeof value == 'symbol' ||
-           (isObjectLike(value) && baseGetTag(value) == symbolTag);
-       }
+       function presetField(fieldID, field) {
+         var _this = Object.assign({}, field); // shallow copy

 
 

-       /** Used as references for various `Number` constants. */
-       var NAN = 0 / 0;

 
 

-       /** Used to match leading and trailing whitespace. */
-       var reTrim = /^\s+|\s+$/g;
+         _this.id = fieldID; // for use in classes, element ids, css selectors

 
 

-       /** Used to detect bad signed hexadecimal string values. */
-       var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+         _this.safeid = utilSafeClassName(fieldID);

 
 

-       /** Used to detect binary string values. */
-       var reIsBinary = /^0b[01]+$/i;
+         _this.matchGeometry = function (geom) {
+           return !_this.geometry || _this.geometry.indexOf(geom) !== -1;
+         };

 
 

-       /** Used to detect octal string values. */
-       var reIsOctal = /^0o[0-7]+$/i;
+         _this.matchAllGeometry = function (geometries) {
+           return !_this.geometry || geometries.every(function (geom) {
+             return _this.geometry.indexOf(geom) !== -1;
+           });
+         };

 
 

-       /** Built-in method references without a dependency on `root`. */
-       var freeParseInt = parseInt;
+         _this.t = function (scope, options) {
+           return _t("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
+         };

 
 

-       /**
-        * Converts `value` to a number.
-        *
-        * @static
-        * @memberOf _
-        * @since 4.0.0
-        * @category Lang
-        * @param {*} value The value to process.
-        * @returns {number} Returns the number.
-        * @example
-        *
-        * _.toNumber(3.2);
-        * // => 3.2
-        *
-        * _.toNumber(Number.MIN_VALUE);
-        * // => 5e-324
-        *
-        * _.toNumber(Infinity);
-        * // => Infinity
-        *
-        * _.toNumber('3.2');
-        * // => 3.2
-        */
-       function toNumber(value) {
-         if (typeof value == 'number') {
-           return value;
-         }
-         if (isSymbol$4(value)) {
-           return NAN;
-         }
-         if (isObject$1(value)) {
-           var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
-           value = isObject$1(other) ? (other + '') : other;
-         }
-         if (typeof value != 'string') {
-           return value === 0 ? value : +value;
-         }
-         value = value.replace(reTrim, '');
-         var isBinary = reIsBinary.test(value);
-         return (isBinary || reIsOctal.test(value))
-           ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
-           : (reIsBadHex.test(value) ? NAN : +value);
-       }
+         _this.t.html = function (scope, options) {
+           return _t.html("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
+         };

 
 

-       /** Error message constants. */
-       var FUNC_ERROR_TEXT = 'Expected a function';
+         _this.hasTextForStringId = function (scope) {
+           return _mainLocalizer.hasTextForStringId("_tagging.presets.fields.".concat(fieldID, ".").concat(scope));
+         };

 
 

-       /* Built-in method references for those with the same name as other `lodash` methods. */
-       var nativeMax = Math.max,
-           nativeMin = Math.min;
+         _this.title = function () {
+           return _this.overrideLabel || _this.t('label', {
+             'default': fieldID
+           });
+         };

 
 

-       /**
-        * Creates a debounced function that delays invoking `func` until after `wait`
-        * milliseconds have elapsed since the last time the debounced function was
-        * invoked. The debounced function comes with a `cancel` method to cancel
-        * delayed `func` invocations and a `flush` method to immediately invoke them.
-        * Provide `options` to indicate whether `func` should be invoked on the
-        * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
-        * with the last arguments provided to the debounced function. Subsequent
-        * calls to the debounced function return the result of the last `func`
-        * invocation.
-        *
-        * **Note:** If `leading` and `trailing` options are `true`, `func` is
-        * invoked on the trailing edge of the timeout only if the debounced function
-        * is invoked more than once during the `wait` timeout.
-        *
-        * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
-        * until to the next tick, similar to `setTimeout` with a timeout of `0`.
-        *
-        * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
-        * for details over the differences between `_.debounce` and `_.throttle`.
-        *
-        * @static
-        * @memberOf _
-        * @since 0.1.0
-        * @category Function
-        * @param {Function} func The function to debounce.
-        * @param {number} [wait=0] The number of milliseconds to delay.
-        * @param {Object} [options={}] The options object.
-        * @param {boolean} [options.leading=false]
-        *  Specify invoking on the leading edge of the timeout.
-        * @param {number} [options.maxWait]
-        *  The maximum time `func` is allowed to be delayed before it's invoked.
-        * @param {boolean} [options.trailing=true]
-        *  Specify invoking on the trailing edge of the timeout.
-        * @returns {Function} Returns the new debounced function.
-        * @example
-        *
-        * // Avoid costly calculations while the window size is in flux.
-        * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
-        *
-        * // Invoke `sendMail` when clicked, debouncing subsequent calls.
-        * jQuery(element).on('click', _.debounce(sendMail, 300, {
-        *   'leading': true,
-        *   'trailing': false
-        * }));
-        *
-        * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
-        * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
-        * var source = new EventSource('/stream');
-        * jQuery(source).on('message', debounced);
-        *
-        * // Cancel the trailing debounced invocation.
-        * jQuery(window).on('popstate', debounced.cancel);
-        */
-       function debounce(func, wait, options) {
-         var lastArgs,
-             lastThis,
-             maxWait,
-             result,
-             timerId,
-             lastCallTime,
-             lastInvokeTime = 0,
-             leading = false,
-             maxing = false,
-             trailing = true;
+         _this.label = function () {
+           return _this.overrideLabel || _this.t.html('label', {
+             'default': fieldID
+           });
+         };

 
 

-         if (typeof func != 'function') {
-           throw new TypeError(FUNC_ERROR_TEXT);
-         }
-         wait = toNumber(wait) || 0;
-         if (isObject$1(options)) {
-           leading = !!options.leading;
-           maxing = 'maxWait' in options;
-           maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
-           trailing = 'trailing' in options ? !!options.trailing : trailing;
-         }
+         var _placeholder = _this.placeholder;

 
 

-         function invokeFunc(time) {
-           var args = lastArgs,
-               thisArg = lastThis;
+         _this.placeholder = function () {
+           return _this.t('placeholder', {
+             'default': _placeholder
+           });
+         };

 
 

-           lastArgs = lastThis = undefined;
-           lastInvokeTime = time;
-           result = func.apply(thisArg, args);
-           return result;
-         }
+         _this.originalTerms = (_this.terms || []).join();

 
 

-         function leadingEdge(time) {
-           // Reset any `maxWait` timer.
-           lastInvokeTime = time;
-           // Start the timer for the trailing edge.
-           timerId = setTimeout(timerExpired, wait);
-           // Invoke the leading edge.
-           return leading ? invokeFunc(time) : result;
-         }
+         _this.terms = function () {
+           return _this.t('terms', {
+             'default': _this.originalTerms
+           }).toLowerCase().trim().split(/\s*,+\s*/);
+         };

 
 

-         function remainingWait(time) {
-           var timeSinceLastCall = time - lastCallTime,
-               timeSinceLastInvoke = time - lastInvokeTime,
-               timeWaiting = wait - timeSinceLastCall;
+         _this.increment = _this.type === 'number' ? _this.increment || 1 : undefined;
+         return _this;
+       }

 
 

-           return maxing
-             ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
-             : timeWaiting;
-         }
+       var $$8 = _export;
+       var lastIndexOf = arrayLastIndexOf;

 
 

-         function shouldInvoke(time) {
-           var timeSinceLastCall = time - lastCallTime,
-               timeSinceLastInvoke = time - lastInvokeTime;
+       // `Array.prototype.lastIndexOf` method
+       // https://tc39.es/ecma262/#sec-array.prototype.lastindexof
+       // eslint-disable-next-line es/no-array-prototype-lastindexof -- required for testing
+       $$8({ target: 'Array', proto: true, forced: lastIndexOf !== [].lastIndexOf }, {
+         lastIndexOf: lastIndexOf
+       });

 
 

-           // Either this is the first call, activity has stopped and we're at the
-           // trailing edge, the system time has gone backwards and we're treating
-           // it as the trailing edge, or we've hit the `maxWait` limit.
-           return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
-             (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
-         }
+       // `presetPreset` decorates a given `preset` Object
+       // with some extra methods for searching and matching geometry
+       //

 
 

-         function timerExpired() {
-           var time = now$1();
-           if (shouldInvoke(time)) {
-             return trailingEdge(time);
-           }
-           // Restart the timer.
-           timerId = setTimeout(timerExpired, remainingWait(time));
-         }
+       function presetPreset(presetID, preset, addable, allFields, allPresets) {
+         allFields = allFields || {};
+         allPresets = allPresets || {};

 
 

-         function trailingEdge(time) {
-           timerId = undefined;
+         var _this = Object.assign({}, preset); // shallow copy

 
 

-           // Only invoke if we have `lastArgs` which means `func` has been
-           // debounced at least once.
-           if (trailing && lastArgs) {
-             return invokeFunc(time);
-           }
-           lastArgs = lastThis = undefined;
-           return result;
-         }

 
 

-         function cancel() {
-           if (timerId !== undefined) {
-             clearTimeout(timerId);
-           }
-           lastInvokeTime = 0;
-           lastArgs = lastCallTime = lastThis = timerId = undefined;
-         }
+         var _addable = addable || false;

 
 

-         function flush() {
-           return timerId === undefined ? result : trailingEdge(now$1());
-         }
+         var _resolvedFields; // cache

 
 

-         function debounced() {
-           var time = now$1(),
-               isInvoking = shouldInvoke(time);

 
 

-           lastArgs = arguments;
-           lastThis = this;
-           lastCallTime = time;
+         var _resolvedMoreFields; // cache

 
 

-           if (isInvoking) {
-             if (timerId === undefined) {
-               return leadingEdge(lastCallTime);
-             }
-             if (maxing) {
-               // Handle invocations in a tight loop.
-               clearTimeout(timerId);
-               timerId = setTimeout(timerExpired, wait);
-               return invokeFunc(lastCallTime);
-             }
-           }
-           if (timerId === undefined) {
-             timerId = setTimeout(timerExpired, wait);
-           }
-           return result;
-         }
-         debounced.cancel = cancel;
-         debounced.flush = flush;
-         return debounced;
-       }

 
 

-       /** Error message constants. */
-       var FUNC_ERROR_TEXT$1 = 'Expected a function';
+         var _searchName; // cache

 
 

-       /**
-        * Creates a throttled function that only invokes `func` at most once per
-        * every `wait` milliseconds. The throttled function comes with a `cancel`
-        * method to cancel delayed `func` invocations and a `flush` method to
-        * immediately invoke them. Provide `options` to indicate whether `func`
-        * should be invoked on the leading and/or trailing edge of the `wait`
-        * timeout. The `func` is invoked with the last arguments provided to the
-        * throttled function. Subsequent calls to the throttled function return the
-        * result of the last `func` invocation.
-        *
-        * **Note:** If `leading` and `trailing` options are `true`, `func` is
-        * invoked on the trailing edge of the timeout only if the throttled function
-        * is invoked more than once during the `wait` timeout.
-        *
-        * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
-        * until to the next tick, similar to `setTimeout` with a timeout of `0`.
-        *
-        * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
-        * for details over the differences between `_.throttle` and `_.debounce`.
-        *
-        * @static
-        * @memberOf _
-        * @since 0.1.0
-        * @category Function
-        * @param {Function} func The function to throttle.
-        * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
-        * @param {Object} [options={}] The options object.
-        * @param {boolean} [options.leading=true]
-        *  Specify invoking on the leading edge of the timeout.
-        * @param {boolean} [options.trailing=true]
-        *  Specify invoking on the trailing edge of the timeout.
-        * @returns {Function} Returns the new throttled function.
-        * @example
-        *
-        * // Avoid excessively updating the position while scrolling.
-        * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
-        *
-        * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
-        * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
-        * jQuery(element).on('click', throttled);
-        *
-        * // Cancel the trailing throttled invocation.
-        * jQuery(window).on('popstate', throttled.cancel);
-        */
-       function throttle(func, wait, options) {
-         var leading = true,
-             trailing = true;

 
 

-         if (typeof func != 'function') {
-           throw new TypeError(FUNC_ERROR_TEXT$1);
-         }
-         if (isObject$1(options)) {
-           leading = 'leading' in options ? !!options.leading : leading;
-           trailing = 'trailing' in options ? !!options.trailing : trailing;
-         }
-         return debounce(func, wait, {
-           'leading': leading,
-           'maxWait': wait,
-           'trailing': trailing
-         });
-       }
+         var _searchNameStripped; // cache

 
 

-       var hashes = createCommonjsModule(function (module, exports) {
-       /**
-        * jshashes - https://github.com/h2non/jshashes
-        * Released under the "New BSD" license
-        *
-        * Algorithms specification:
-        *
-        * MD5 - http://www.ietf.org/rfc/rfc1321.txt
-        * RIPEMD-160 - http://homes.esat.kuleuven.be/~bosselae/ripemd160.html
-        * SHA1   - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-        * SHA256 - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-        * SHA512 - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-        * HMAC - http://www.ietf.org/rfc/rfc2104.txt
-        */
-       (function() {
-         var Hashes;

 
 

-         function utf8Encode(str) {
-           var x, y, output = '',
-             i = -1,
-             l;
-
-           if (str && str.length) {
-             l = str.length;
-             while ((i += 1) < l) {
-               /* Decode utf-16 surrogate pairs */
-               x = str.charCodeAt(i);
-               y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
-               if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
-                 x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
-                 i += 1;
-               }
-               /* Encode output as utf-8 */
-               if (x <= 0x7F) {
-                 output += String.fromCharCode(x);
-               } else if (x <= 0x7FF) {
-                 output += String.fromCharCode(0xC0 | ((x >>> 6) & 0x1F),
-                   0x80 | (x & 0x3F));
-               } else if (x <= 0xFFFF) {
-                 output += String.fromCharCode(0xE0 | ((x >>> 12) & 0x0F),
-                   0x80 | ((x >>> 6) & 0x3F),
-                   0x80 | (x & 0x3F));
-               } else if (x <= 0x1FFFFF) {
-                 output += String.fromCharCode(0xF0 | ((x >>> 18) & 0x07),
-                   0x80 | ((x >>> 12) & 0x3F),
-                   0x80 | ((x >>> 6) & 0x3F),
-                   0x80 | (x & 0x3F));
-               }
-             }
-           }
-           return output;
-         }
+         _this.id = presetID;
+         _this.safeid = utilSafeClassName(presetID); // for use in css classes, selectors, element ids

 
 

-         function utf8Decode(str) {
-           var i, ac, c1, c2, c3, arr = [],
-             l;
-           i = ac = c1 = c2 = c3 = 0;
-
-           if (str && str.length) {
-             l = str.length;
-             str += '';
-
-             while (i < l) {
-               c1 = str.charCodeAt(i);
-               ac += 1;
-               if (c1 < 128) {
-                 arr[ac] = String.fromCharCode(c1);
-                 i += 1;
-               } else if (c1 > 191 && c1 < 224) {
-                 c2 = str.charCodeAt(i + 1);
-                 arr[ac] = String.fromCharCode(((c1 & 31) << 6) | (c2 & 63));
-                 i += 2;
-               } else {
-                 c2 = str.charCodeAt(i + 1);
-                 c3 = str.charCodeAt(i + 2);
-                 arr[ac] = String.fromCharCode(((c1 & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
-                 i += 3;
-               }
-             }
-           }
-           return arr.join('');
-         }
+         _this.originalTerms = (_this.terms || []).join();
+         _this.originalName = _this.name || '';
+         _this.originalScore = _this.matchScore || 1;
+         _this.originalReference = _this.reference || {};
+         _this.originalFields = _this.fields || [];
+         _this.originalMoreFields = _this.moreFields || [];

 
 

-         /**
-          * Add integers, wrapping at 2^32. This uses 16-bit operations internally
-          * to work around bugs in some JS interpreters.
-          */
+         _this.fields = function () {
+           return _resolvedFields || (_resolvedFields = resolve('fields'));
+         };

 
 

-         function safe_add(x, y) {
-           var lsw = (x & 0xFFFF) + (y & 0xFFFF),
-             msw = (x >> 16) + (y >> 16) + (lsw >> 16);
-           return (msw << 16) | (lsw & 0xFFFF);
-         }
+         _this.moreFields = function () {
+           return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields'));
+         };

 
 

-         /**
-          * Bitwise rotate a 32-bit number to the left.
-          */
+         _this.resetFields = function () {
+           return _resolvedFields = _resolvedMoreFields = null;
+         };

 
 

-         function bit_rol(num, cnt) {
-           return (num << cnt) | (num >>> (32 - cnt));
-         }
+         _this.tags = _this.tags || {};
+         _this.addTags = _this.addTags || _this.tags;
+         _this.removeTags = _this.removeTags || _this.addTags;
+         _this.geometry = _this.geometry || [];

 
 

-         /**
-          * Convert a raw string to a hex string
-          */
+         _this.matchGeometry = function (geom) {
+           return _this.geometry.indexOf(geom) >= 0;
+         };

 
 

-         function rstr2hex(input, hexcase) {
-           var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
-             output = '',
-             x, i = 0,
-             l = input.length;
-           for (; i < l; i += 1) {
-             x = input.charCodeAt(i);
-             output += hex_tab.charAt((x >>> 4) & 0x0F) + hex_tab.charAt(x & 0x0F);
-           }
-           return output;
-         }
+         _this.matchAllGeometry = function (geoms) {
+           return geoms.every(_this.matchGeometry);
+         };

 
 

-         /**
-          * Convert an array of big-endian words to a string
-          */
+         _this.matchScore = function (entityTags) {
+           var tags = _this.tags;
+           var seen = {};
+           var score = 0; // match on tags

 
 

-         function binb2rstr(input) {
-           var i, l = input.length * 32,
-             output = '';
-           for (i = 0; i < l; i += 8) {
-             output += String.fromCharCode((input[i >> 5] >>> (24 - i % 32)) & 0xFF);
-           }
-           return output;
-         }
+           for (var k in tags) {
+             seen[k] = true;

 
 

-         /**
-          * Convert an array of little-endian words to a string
-          */
+             if (entityTags[k] === tags[k]) {
+               score += _this.originalScore;
+             } else if (tags[k] === '*' && k in entityTags) {
+               score += _this.originalScore / 2;
+             } else {
+               return -1;
+             }
+           } // boost score for additional matches in addTags - #6802

 
 

-         function binl2rstr(input) {
-           var i, l = input.length * 32,
-             output = '';
-           for (i = 0; i < l; i += 8) {
-             output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF);
-           }
-           return output;
-         }

 
 

-         /**
-          * Convert a raw string to an array of little-endian words
-          * Characters >255 have their high-byte silently ignored.
-          */
+           var addTags = _this.addTags;

 
 

-         function rstr2binl(input) {
-           var i, l = input.length * 8,
-             output = Array(input.length >> 2),
-             lo = output.length;
-           for (i = 0; i < lo; i += 1) {
-             output[i] = 0;
-           }
-           for (i = 0; i < l; i += 8) {
-             output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (i % 32);
+           for (var _k in addTags) {
+             if (!seen[_k] && entityTags[_k] === addTags[_k]) {
+               score += _this.originalScore;
+             }

            }
            }

-           return output;
-         }

 
 

-         /**
-          * Convert a raw string to an array of big-endian words
-          * Characters >255 have their high-byte silently ignored.
-          */
+           return score;
+         };

 
 

-         function rstr2binb(input) {
-           var i, l = input.length * 8,
-             output = Array(input.length >> 2),
-             lo = output.length;
-           for (i = 0; i < lo; i += 1) {
-             output[i] = 0;
-           }
-           for (i = 0; i < l; i += 8) {
-             output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (24 - i % 32);
-           }
-           return output;
-         }
+         _this.t = function (scope, options) {
+           var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
+           return _t(textID, options);
+         };

 
 

-         /**
-          * Convert a raw string to an arbitrary string encoding
-          */
+         _this.t.html = function (scope, options) {
+           var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
+           return _t.html(textID, options);
+         };

 
 

-         function rstr2any(input, encoding) {
-           var divisor = encoding.length,
-             remainders = Array(),
-             i, q, x, ld, quotient, dividend, output, full_length;
+         _this.name = function () {
+           return _this.t('name', {
+             'default': _this.originalName
+           });
+         };

 
 

-           /* Convert to an array of 16-bit big-endian values, forming the dividend */
-           dividend = Array(Math.ceil(input.length / 2));
-           ld = dividend.length;
-           for (i = 0; i < ld; i += 1) {
-             dividend[i] = (input.charCodeAt(i * 2) << 8) | input.charCodeAt(i * 2 + 1);
-           }
+         _this.nameLabel = function () {
+           return _this.t.html('name', {
+             'default': _this.originalName
+           });
+         };

 
 

-           /**
-            * Repeatedly perform a long division. The binary array forms the dividend,
-            * the length of the encoding is the divisor. Once computed, the quotient
-            * forms the dividend for the next step. We stop when the dividend is zerHashes.
-            * All remainders are stored for later use.
-            */
-           while (dividend.length > 0) {
-             quotient = Array();
-             x = 0;
-             for (i = 0; i < dividend.length; i += 1) {
-               x = (x << 16) + dividend[i];
-               q = Math.floor(x / divisor);
-               x -= q * divisor;
-               if (quotient.length > 0 || q > 0) {
-                 quotient[quotient.length] = q;
-               }
-             }
-             remainders[remainders.length] = x;
-             dividend = quotient;
-           }
+         _this.subtitle = function () {
+           if (_this.suggestion) {
+             var path = presetID.split('/');
+             path.pop(); // remove brand name

 
 

-           /* Convert the remainders to the output string */
-           output = '';
-           for (i = remainders.length - 1; i >= 0; i--) {
-             output += encoding.charAt(remainders[i]);
+             return _t('_tagging.presets.presets.' + path.join('/') + '.name');

            }
 
            }
 

-           /* Append leading zero equivalents */
-           full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
-           for (i = output.length; i < full_length; i += 1) {
-             output = encoding[0] + output;
-           }
-           return output;
-         }
+           return null;
+         };

 
 

-         /**
-          * Convert a raw string to a base-64 string
-          */
+         _this.subtitleLabel = function () {
+           if (_this.suggestion) {
+             var path = presetID.split('/');
+             path.pop(); // remove brand name

 
 

-         function rstr2b64(input, b64pad) {
-           var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
-             output = '',
-             len = input.length,
-             i, j, triplet;
-           b64pad = b64pad || '=';
-           for (i = 0; i < len; i += 3) {
-             triplet = (input.charCodeAt(i) << 16) | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
-             for (j = 0; j < 4; j += 1) {
-               if (i * 8 + j * 6 > input.length * 8) {
-                 output += b64pad;
-               } else {
-                 output += tab.charAt((triplet >>> 6 * (3 - j)) & 0x3F);
-               }
-             }
+             return _t.html('_tagging.presets.presets.' + path.join('/') + '.name');

            }
            }

-           return output;
-         }

 
 

-         Hashes = {
-           /**
-            * @property {String} version
-            * @readonly
-            */
-           VERSION: '1.0.6',
-           /**
-            * @member Hashes
-            * @class Base64
-            * @constructor
-            */
-           Base64: function() {
-             // private properties
-             var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
-               pad = '=', // default pad according with the RFC standard
-               utf8 = true; // by default enable UTF-8 support encoding
+           return null;
+         };

 
 

-             // public method for encoding
-             this.encode = function(input) {
-               var i, j, triplet,
-                 output = '',
-                 len = input.length;
+         _this.terms = function () {
+           return _this.t('terms', {
+             'default': _this.originalTerms
+           }).toLowerCase().trim().split(/\s*,+\s*/);
+         };

 
 

-               pad = pad || '=';
-               input = (utf8) ? utf8Encode(input) : input;
+         _this.searchName = function () {
+           if (!_searchName) {
+             _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();
+           }

 
 

-               for (i = 0; i < len; i += 3) {
-                 triplet = (input.charCodeAt(i) << 16) | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
-                 for (j = 0; j < 4; j += 1) {
-                   if (i * 8 + j * 6 > len * 8) {
-                     output += pad;
-                   } else {
-                     output += tab.charAt((triplet >>> 6 * (3 - j)) & 0x3F);
-                   }
-                 }
-               }
-               return output;
-             };
+           return _searchName;
+         };

 
 

-             // public method for decoding
-             this.decode = function(input) {
-               // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
-               var i, o1, o2, o3, h1, h2, h3, h4, bits, ac,
-                 dec = '',
-                 arr = [];
-               if (!input) {
-                 return input;
-               }
+         _this.searchNameStripped = function () {
+           if (!_searchNameStripped) {
+             _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts

 
 

-               i = ac = 0;
-               input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
-               //input += '';
+             if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics

 
 

-               do { // unpack four hexets into three octets using index points in b64
-                 h1 = tab.indexOf(input.charAt(i += 1));
-                 h2 = tab.indexOf(input.charAt(i += 1));
-                 h3 = tab.indexOf(input.charAt(i += 1));
-                 h4 = tab.indexOf(input.charAt(i += 1));
+             _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
+           }

 
 

-                 bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
+           return _searchNameStripped;
+         };

 
 

-                 o1 = bits >> 16 & 0xff;
-                 o2 = bits >> 8 & 0xff;
-                 o3 = bits & 0xff;
-                 ac += 1;
+         _this.isFallback = function () {
+           var tagCount = Object.keys(_this.tags).length;
+           return tagCount === 0 || tagCount === 1 && _this.tags.hasOwnProperty('area');
+         };

 
 

-                 if (h3 === 64) {
-                   arr[ac] = String.fromCharCode(o1);
-                 } else if (h4 === 64) {
-                   arr[ac] = String.fromCharCode(o1, o2);
-                 } else {
-                   arr[ac] = String.fromCharCode(o1, o2, o3);
-                 }
-               } while (i < input.length);
+         _this.addable = function (val) {
+           if (!arguments.length) return _addable;
+           _addable = val;
+           return _this;
+         };

 
 

-               dec = arr.join('');
-               dec = (utf8) ? utf8Decode(dec) : dec;
+         _this.reference = function () {
+           // Lookup documentation on Wikidata...
+           var qid = _this.tags.wikidata || _this.tags['flag:wikidata'] || _this.tags['brand:wikidata'] || _this.tags['network:wikidata'] || _this.tags['operator:wikidata'];

 
 

-               return dec;
+           if (qid) {
+             return {
+               qid: qid

              };
              };

+           } // Lookup documentation on OSM Wikibase...

 
 

-             // set custom pad string
-             this.setPad = function(str) {
-               pad = str || pad;
-               return this;
-             };
-             // set custom tab string characters
-             this.setTab = function(str) {
-               tab = str || tab;
-               return this;
-             };
-             this.setUTF8 = function(bool) {
-               if (typeof bool === 'boolean') {
-                 utf8 = bool;
-               }
-               return this;
-             };
-           },

 
 

-           /**
-            * CRC-32 calculation
-            * @member Hashes
-            * @method CRC32
-            * @static
-            * @param {String} str Input String
-            * @return {String}
-            */
-           CRC32: function(str) {
-             var crc = 0,
-               x = 0,
-               y = 0,
-               table, i, iTop;
-             str = utf8Encode(str);
-
-             table = [
-               '00000000 77073096 EE0E612C 990951BA 076DC419 706AF48F E963A535 9E6495A3 0EDB8832 ',
-               '79DCB8A4 E0D5E91E 97D2D988 09B64C2B 7EB17CBD E7B82D07 90BF1D91 1DB71064 6AB020F2 F3B97148 ',
-               '84BE41DE 1ADAD47D 6DDDE4EB F4D4B551 83D385C7 136C9856 646BA8C0 FD62F97A 8A65C9EC 14015C4F ',
-               '63066CD9 FA0F3D63 8D080DF5 3B6E20C8 4C69105E D56041E4 A2677172 3C03E4D1 4B04D447 D20D85FD ',
-               'A50AB56B 35B5A8FA 42B2986C DBBBC9D6 ACBCF940 32D86CE3 45DF5C75 DCD60DCF ABD13D59 26D930AC ',
-               '51DE003A C8D75180 BFD06116 21B4F4B5 56B3C423 CFBA9599 B8BDA50F 2802B89E 5F058808 C60CD9B2 ',
-               'B10BE924 2F6F7C87 58684C11 C1611DAB B6662D3D 76DC4190 01DB7106 98D220BC EFD5102A 71B18589 ',
-               '06B6B51F 9FBFE4A5 E8B8D433 7807C9A2 0F00F934 9609A88E E10E9818 7F6A0DBB 086D3D2D 91646C97 ',
-               'E6635C01 6B6B51F4 1C6C6162 856530D8 F262004E 6C0695ED 1B01A57B 8208F4C1 F50FC457 65B0D9C6 ',
-               '12B7E950 8BBEB8EA FCB9887C 62DD1DDF 15DA2D49 8CD37CF3 FBD44C65 4DB26158 3AB551CE A3BC0074 ',
-               'D4BB30E2 4ADFA541 3DD895D7 A4D1C46D D3D6F4FB 4369E96A 346ED9FC AD678846 DA60B8D0 44042D73 ',
-               '33031DE5 AA0A4C5F DD0D7CC9 5005713C 270241AA BE0B1010 C90C2086 5768B525 206F85B3 B966D409 ',
-               'CE61E49F 5EDEF90E 29D9C998 B0D09822 C7D7A8B4 59B33D17 2EB40D81 B7BD5C3B C0BA6CAD EDB88320 ',
-               '9ABFB3B6 03B6E20C 74B1D29A EAD54739 9DD277AF 04DB2615 73DC1683 E3630B12 94643B84 0D6D6A3E ',
-               '7A6A5AA8 E40ECF0B 9309FF9D 0A00AE27 7D079EB1 F00F9344 8708A3D2 1E01F268 6906C2FE F762575D ',
-               '806567CB 196C3671 6E6B06E7 FED41B76 89D32BE0 10DA7A5A 67DD4ACC F9B9DF6F 8EBEEFF9 17B7BE43 ',
-               '60B08ED5 D6D6A3E8 A1D1937E 38D8C2C4 4FDFF252 D1BB67F1 A6BC5767 3FB506DD 48B2364B D80D2BDA ',
-               'AF0A1B4C 36034AF6 41047A60 DF60EFC3 A867DF55 316E8EEF 4669BE79 CB61B38C BC66831A 256FD2A0 ',
-               '5268E236 CC0C7795 BB0B4703 220216B9 5505262F C5BA3BBE B2BD0B28 2BB45A92 5CB36A04 C2D7FFA7 ',
-               'B5D0CF31 2CD99E8B 5BDEAE1D 9B64C2B0 EC63F226 756AA39C 026D930A 9C0906A9 EB0E363F 72076785 ',
-               '05005713 95BF4A82 E2B87A14 7BB12BAE 0CB61B38 92D28E9B E5D5BE0D 7CDCEFB7 0BDBDF21 86D3D2D4 ',
-               'F1D4E242 68DDB3F8 1FDA836E 81BE16CD F6B9265B 6FB077E1 18B74777 88085AE6 FF0F6A70 66063BCA ',
-               '11010B5C 8F659EFF F862AE69 616BFFD3 166CCF45 A00AE278 D70DD2EE 4E048354 3903B3C2 A7672661 ',
-               'D06016F7 4969474D 3E6E77DB AED16A4A D9D65ADC 40DF0B66 37D83BF0 A9BCAE53 DEBB9EC5 47B2CF7F ',
-               '30B5FFE9 BDBDF21C CABAC28A 53B39330 24B4A3A6 BAD03605 CDD70693 54DE5729 23D967BF B3667A2E ',
-               'C4614AB8 5D681B02 2A6F2B94 B40BBE37 C30C8EA1 5A05DF1B 2D02EF8D'
-             ].join('');
-
-             crc = crc ^ (-1);
-             for (i = 0, iTop = str.length; i < iTop; i += 1) {
-               y = (crc ^ str.charCodeAt(i)) & 0xFF;
-               x = '0x' + table.substr(y * 9, 8);
-               crc = (crc >>> 8) ^ x;
-             }
-             // always return a positive number (that's what >>> 0 does)
-             return (crc ^ (-1)) >>> 0;
-           },
-           /**
-            * @member Hashes
-            * @class MD5
-            * @constructor
-            * @param {Object} [config]
-            *
-            * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
-            * Digest Algorithm, as defined in RFC 1321.
-            * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
-            * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-            * See <http://pajhome.org.uk/crypt/md5> for more infHashes.
-            */
-           MD5: function(options) {
-             /**
-              * Private config properties. You may need to tweak these to be compatible with
-              * the server-side, but the defaults work in most cases.
-              * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
-              */
-             var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false, // hexadecimal output case format. false - lowercase; true - uppercase
-               b64pad = (options && typeof options.pad === 'string') ? options.pad : '=', // base-64 pad character. Defaults to '=' for strict RFC compliance
-               utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true; // enable/disable utf8 encoding
+           var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
+           var value = _this.originalReference.value || _this.tags[key];

 
 

-             // privileged (public) methods
-             this.hex = function(s) {
-               return rstr2hex(rstr(s), hexcase);
-             };
-             this.b64 = function(s) {
-               return rstr2b64(rstr(s), b64pad);
-             };
-             this.any = function(s, e) {
-               return rstr2any(rstr(s), e);
-             };
-             this.raw = function(s) {
-               return rstr(s);
-             };
-             this.hex_hmac = function(k, d) {
-               return rstr2hex(rstr_hmac(k, d), hexcase);
-             };
-             this.b64_hmac = function(k, d) {
-               return rstr2b64(rstr_hmac(k, d), b64pad);
-             };
-             this.any_hmac = function(k, d, e) {
-               return rstr2any(rstr_hmac(k, d), e);
-             };
-             /**
-              * Perform a simple self-test to see if the VM is working
-              * @return {String} Hexadecimal hash sample
-              */
-             this.vm_test = function() {
-               return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-             };
-             /**
-              * Enable/disable uppercase hexadecimal returned string
-              * @param {Boolean}
-              * @return {Object} this
-              */
-             this.setUpperCase = function(a) {
-               if (typeof a === 'boolean') {
-                 hexcase = a;
-               }
-               return this;
+           if (value === '*') {
+             return {
+               key: key

              };
              };

-             /**
-              * Defines a base64 pad string
-              * @param {String} Pad
-              * @return {Object} this
-              */
-             this.setPad = function(a) {
-               b64pad = a || b64pad;
-               return this;
+           } else {
+             return {
+               key: key,
+               value: value

              };
              };

-             /**
-              * Defines a base64 pad string
-              * @param {Boolean}
-              * @return {Object} [this]
-              */
-             this.setUTF8 = function(a) {
-               if (typeof a === 'boolean') {
-                 utf8 = a;
+           }
+         };
+
+         _this.unsetTags = function (tags, geometry, ignoringKeys, skipFieldDefaults) {
+           // allow manually keeping some tags
+           var removeTags = ignoringKeys ? utilObjectOmit(_this.removeTags, ignoringKeys) : _this.removeTags;
+           tags = utilObjectOmit(tags, Object.keys(removeTags));
+
+           if (geometry && !skipFieldDefaults) {
+             _this.fields().forEach(function (field) {
+               if (field.matchGeometry(geometry) && field.key && field["default"] === tags[field.key]) {
+                 delete tags[field.key];

                }
                }

-               return this;
-             };
+             });
+           }

 
 

-             // private methods
+           delete tags.area;
+           return tags;
+         };

 
 

-             /**
-              * Calculate the MD5 of a raw string
-              */
+         _this.setTags = function (tags, geometry, skipFieldDefaults) {
+           var addTags = _this.addTags;
+           tags = Object.assign({}, tags); // shallow copy

 
 

-             function rstr(s) {
-               s = (utf8) ? utf8Encode(s) : s;
-               return binl2rstr(binl(rstr2binl(s), s.length * 8));
+           for (var k in addTags) {
+             if (addTags[k] === '*') {
+               // if this tag is ancillary, don't override an existing value since any value is okay
+               if (_this.tags[k] || !tags[k] || tags[k] === 'no') {
+                 tags[k] = 'yes';
+               }
+             } else {
+               tags[k] = addTags[k];

              }
              }

+           } // Add area=yes if necessary.
+           // This is necessary if the geometry is already an area (e.g. user drew an area) AND any of:
+           // 1. chosen preset could be either an area or a line (`barrier=city_wall`)
+           // 2. chosen preset doesn't have a key in osmAreaKeys (`railway=station`)

 
 

-             /**
-              * Calculate the HMAC-MD5, of a key and some data (raw strings)
-              */

 
 

-             function rstr_hmac(key, data) {
-               var bkey, ipad, opad, hash, i;
+           if (!addTags.hasOwnProperty('area')) {
+             delete tags.area;
+
+             if (geometry === 'area') {
+               var needsAreaTag = true;

 
 

-               key = (utf8) ? utf8Encode(key) : key;
-               data = (utf8) ? utf8Encode(data) : data;
-               bkey = rstr2binl(key);
-               if (bkey.length > 16) {
-                 bkey = binl(bkey, key.length * 8);
+               if (_this.geometry.indexOf('line') === -1) {
+                 for (var _k2 in addTags) {
+                   if (_k2 in osmAreaKeys) {
+                     needsAreaTag = false;
+                     break;
+                   }
+                 }

                }
 
                }
 

-               ipad = Array(16), opad = Array(16);
-               for (i = 0; i < 16; i += 1) {
-                 ipad[i] = bkey[i] ^ 0x36363636;
-                 opad[i] = bkey[i] ^ 0x5C5C5C5C;
+               if (needsAreaTag) {
+                 tags.area = 'yes';

                }
                }

-               hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
-               return binl2rstr(binl(opad.concat(hash), 512 + 128));

              }
              }

+           }

 
 

-             /**
-              * Calculate the MD5 of an array of little-endian words, and a bit length.
-              */
+           if (geometry && !skipFieldDefaults) {
+             _this.fields().forEach(function (field) {
+               if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field["default"]) {
+                 tags[field.key] = field["default"];
+               }
+             });
+           }

 
 

-             function binl(x, len) {
-               var i, olda, oldb, oldc, oldd,
-                 a = 1732584193,
-                 b = -271733879,
-                 c = -1732584194,
-                 d = 271733878;
-
-               /* append padding */
-               x[len >> 5] |= 0x80 << ((len) % 32);
-               x[(((len + 64) >>> 9) << 4) + 14] = len;
-
-               for (i = 0; i < x.length; i += 16) {
-                 olda = a;
-                 oldb = b;
-                 oldc = c;
-                 oldd = d;
-
-                 a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
-                 d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
-                 c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
-                 b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
-                 a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
-                 d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
-                 c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
-                 b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
-                 a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
-                 d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
-                 c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
-                 b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
-                 a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
-                 d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
-                 c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
-                 b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
-
-                 a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
-                 d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
-                 c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
-                 b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
-                 a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
-                 d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
-                 c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
-                 b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
-                 a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
-                 d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
-                 c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
-                 b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
-                 a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
-                 d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
-                 c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
-                 b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
-
-                 a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
-                 d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
-                 c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
-                 b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
-                 a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
-                 d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
-                 c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
-                 b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
-                 a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
-                 d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
-                 c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
-                 b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
-                 a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
-                 d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
-                 c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
-                 b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
-
-                 a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
-                 d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
-                 c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
-                 b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
-                 a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
-                 d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
-                 c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
-                 b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
-                 a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
-                 d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
-                 c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
-                 b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
-                 a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
-                 d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
-                 c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
-                 b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
-
-                 a = safe_add(a, olda);
-                 b = safe_add(b, oldb);
-                 c = safe_add(c, oldc);
-                 d = safe_add(d, oldd);
-               }
-               return Array(a, b, c, d);
-             }
+           return tags;
+         }; // For a preset without fields, use the fields of the parent preset.
+         // Replace {preset} placeholders with the fields of the specified presets.

 
 

-             /**
-              * These functions implement the four basic operations the algorithm uses.
-              */

 
 

-             function md5_cmn(q, a, b, x, s, t) {
-               return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
-             }
+         function resolve(which) {
+           var fieldIDs = which === 'fields' ? _this.originalFields : _this.originalMoreFields;
+           var resolved = [];
+           fieldIDs.forEach(function (fieldID) {
+             var match = fieldID.match(/\{(.*)\}/);

 
 

-             function md5_ff(a, b, c, d, x, s, t) {
-               return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
+             if (match !== null) {
+               // a presetID wrapped in braces {}
+               resolved = resolved.concat(inheritFields(match[1], which));
+             } else if (allFields[fieldID]) {
+               // a normal fieldID
+               resolved.push(allFields[fieldID]);
+             } else {
+               console.log("Cannot resolve \"".concat(fieldID, "\" found in ").concat(_this.id, ".").concat(which)); // eslint-disable-line no-console

              }
              }

+           }); // no fields resolved, so use the parent's if possible

 
 

-             function md5_gg(a, b, c, d, x, s, t) {
-               return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
-             }
+           if (!resolved.length) {
+             var endIndex = _this.id.lastIndexOf('/');

 
 

-             function md5_hh(a, b, c, d, x, s, t) {
-               return md5_cmn(b ^ c ^ d, a, b, x, s, t);
-             }
+             var parentID = endIndex && _this.id.substring(0, endIndex);

 
 

-             function md5_ii(a, b, c, d, x, s, t) {
-               return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
+             if (parentID) {
+               resolved = inheritFields(parentID, which);

              }
              }

-           },
-           /**
-            * @member Hashes
-            * @class Hashes.SHA1
-            * @param {Object} [config]
-            * @constructor
-            *
-            * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined in FIPS 180-1
-            * Version 2.2 Copyright Paul Johnston 2000 - 2009.
-            * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-            * See http://pajhome.org.uk/crypt/md5 for details.
-            */
-           SHA1: function(options) {
-             /**
-              * Private config properties. You may need to tweak these to be compatible with
-              * the server-side, but the defaults work in most cases.
-              * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
-              */
-             var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false, // hexadecimal output case format. false - lowercase; true - uppercase
-               b64pad = (options && typeof options.pad === 'string') ? options.pad : '=', // base-64 pad character. Defaults to '=' for strict RFC compliance
-               utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true; // enable/disable utf8 encoding
-
-             // public methods
-             this.hex = function(s) {
-               return rstr2hex(rstr(s), hexcase);
-             };
-             this.b64 = function(s) {
-               return rstr2b64(rstr(s), b64pad);
-             };
-             this.any = function(s, e) {
-               return rstr2any(rstr(s), e);
-             };
-             this.raw = function(s) {
-               return rstr(s);
-             };
-             this.hex_hmac = function(k, d) {
-               return rstr2hex(rstr_hmac(k, d));
-             };
-             this.b64_hmac = function(k, d) {
-               return rstr2b64(rstr_hmac(k, d), b64pad);
-             };
-             this.any_hmac = function(k, d, e) {
-               return rstr2any(rstr_hmac(k, d), e);
-             };
-             /**
-              * Perform a simple self-test to see if the VM is working
-              * @return {String} Hexadecimal hash sample
-              * @public
-              */
-             this.vm_test = function() {
-               return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-             };
-             /**
-              * @description Enable/disable uppercase hexadecimal returned string
-              * @param {boolean}
-              * @return {Object} this
-              * @public
-              */
-             this.setUpperCase = function(a) {
-               if (typeof a === 'boolean') {
-                 hexcase = a;
-               }
-               return this;
-             };
-             /**
-              * @description Defines a base64 pad string
-              * @param {string} Pad
-              * @return {Object} this
-              * @public
-              */
-             this.setPad = function(a) {
-               b64pad = a || b64pad;
-               return this;
-             };
-             /**
-              * @description Defines a base64 pad string
-              * @param {boolean}
-              * @return {Object} this
-              * @public
-              */
-             this.setUTF8 = function(a) {
-               if (typeof a === 'boolean') {
-                 utf8 = a;
-               }
-               return this;
-             };
+           }

 
 

-             // private methods
+           return utilArrayUniq(resolved); // returns an array of fields to inherit from the given presetID, if found

 
 

-             /**
-              * Calculate the SHA-512 of a raw string
-              */
+           function inheritFields(presetID, which) {
+             var parent = allPresets[presetID];
+             if (!parent) return [];

 
 

-             function rstr(s) {
-               s = (utf8) ? utf8Encode(s) : s;
-               return binb2rstr(binb(rstr2binb(s), s.length * 8));
+             if (which === 'fields') {
+               return parent.fields().filter(shouldInherit);
+             } else if (which === 'moreFields') {
+               return parent.moreFields();
+             } else {
+               return [];

              }
              }

+           } // Skip `fields` for the keys which define the preset.
+           // These are usually `typeCombo` fields like `shop=*`

 
 

-             /**
-              * Calculate the HMAC-SHA1 of a key and some data (raw strings)
-              */

 
 

-             function rstr_hmac(key, data) {
-               var bkey, ipad, opad, i, hash;
-               key = (utf8) ? utf8Encode(key) : key;
-               data = (utf8) ? utf8Encode(data) : data;
-               bkey = rstr2binb(key);
+           function shouldInherit(f) {
+             if (f.key && _this.tags[f.key] !== undefined && // inherit anyway if multiple values are allowed or just a checkbox
+             f.type !== 'multiCombo' && f.type !== 'semiCombo' && f.type !== 'manyCombo' && f.type !== 'check') return false;
+             return true;
+           }
+         }

 
 

-               if (bkey.length > 16) {
-                 bkey = binb(bkey, key.length * 8);
-               }
-               ipad = Array(16), opad = Array(16);
-               for (i = 0; i < 16; i += 1) {
-                 ipad[i] = bkey[i] ^ 0x36363636;
-                 opad[i] = bkey[i] ^ 0x5C5C5C5C;
-               }
-               hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
-               return binb2rstr(binb(opad.concat(hash), 512 + 160));
-             }
+         return _this;
+       }

 
 

-             /**
-              * Calculate the SHA-1 of an array of big-endian words, and a bit length
-              */
+       var _mainPresetIndex = presetIndex(); // singleton
+       // `presetIndex` wraps a `presetCollection`
+       // with methods for loading new data and returning defaults
+       //

 
 

-             function binb(x, len) {
-               var i, j, t, olda, oldb, oldc, oldd, olde,
-                 w = Array(80),
-                 a = 1732584193,
-                 b = -271733879,
-                 c = -1732584194,
-                 d = 271733878,
-                 e = -1009589776;
-
-               /* append padding */
-               x[len >> 5] |= 0x80 << (24 - len % 32);
-               x[((len + 64 >> 9) << 4) + 15] = len;
-
-               for (i = 0; i < x.length; i += 16) {
-                 olda = a;
-                 oldb = b;
-                 oldc = c;
-                 oldd = d;
-                 olde = e;
-
-                 for (j = 0; j < 80; j += 1) {
-                   if (j < 16) {
-                     w[j] = x[i + j];
-                   } else {
-                     w[j] = bit_rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
-                   }
-                   t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)),
-                     safe_add(safe_add(e, w[j]), sha1_kt(j)));
-                   e = d;
-                   d = c;
-                   c = bit_rol(b, 30);
-                   b = a;
-                   a = t;
-                 }
+       function presetIndex() {
+         var dispatch = dispatch$8('favoritePreset', 'recentsChange');
+         var MAXRECENTS = 30; // seed the preset lists with geometry fallbacks

 
 

-                 a = safe_add(a, olda);
-                 b = safe_add(b, oldb);
-                 c = safe_add(c, oldc);
-                 d = safe_add(d, oldd);
-                 e = safe_add(e, olde);
-               }
-               return Array(a, b, c, d, e);
-             }
+         var POINT = presetPreset('point', {
+           name: 'Point',
+           tags: {},
+           geometry: ['point', 'vertex'],
+           matchScore: 0.1
+         });
+         var LINE = presetPreset('line', {
+           name: 'Line',
+           tags: {},
+           geometry: ['line'],
+           matchScore: 0.1
+         });
+         var AREA = presetPreset('area', {
+           name: 'Area',
+           tags: {
+             area: 'yes'
+           },
+           geometry: ['area'],
+           matchScore: 0.1
+         });
+         var RELATION = presetPreset('relation', {
+           name: 'Relation',
+           tags: {},
+           geometry: ['relation'],
+           matchScore: 0.1
+         });

 
 

-             /**
-              * Perform the appropriate triplet combination function for the current
-              * iteration
-              */
+         var _this = presetCollection([POINT, LINE, AREA, RELATION]);

 
 

-             function sha1_ft(t, b, c, d) {
-               if (t < 20) {
-                 return (b & c) | ((~b) & d);
-               }
-               if (t < 40) {
-                 return b ^ c ^ d;
-               }
-               if (t < 60) {
-                 return (b & c) | (b & d) | (c & d);
-               }
-               return b ^ c ^ d;
-             }
+         var _presets = {
+           point: POINT,
+           line: LINE,
+           area: AREA,
+           relation: RELATION
+         };
+         var _defaults = {
+           point: presetCollection([POINT]),
+           vertex: presetCollection([POINT]),
+           line: presetCollection([LINE]),
+           area: presetCollection([AREA]),
+           relation: presetCollection([RELATION])
+         };
+         var _fields = {};
+         var _categories = {};
+         var _universal = [];
+         var _addablePresetIDs = null; // Set of preset IDs that the user can add

 
 

-             /**
-              * Determine the appropriate additive constant for the current iteration
-              */
+         var _recents;

 
 

-             function sha1_kt(t) {
-               return (t < 20) ? 1518500249 : (t < 40) ? 1859775393 :
-                 (t < 60) ? -1894007588 : -899497514;
-             }
-           },
-           /**
-            * @class Hashes.SHA256
-            * @param {config}
-            *
-            * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined in FIPS 180-2
-            * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
-            * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-            * See http://pajhome.org.uk/crypt/md5 for details.
-            * Also http://anmar.eu.org/projects/jssha2/
-            */
-           SHA256: function(options) {
-             /**
-              * Private properties configuration variables. You may need to tweak these to be compatible with
-              * the server-side, but the defaults work in most cases.
-              * @see this.setUpperCase() method
-              * @see this.setPad() method
-              */
-             var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false, // hexadecimal output case format. false - lowercase; true - uppercase  */
-               b64pad = (options && typeof options.pad === 'string') ? options.pad : '=',
-               /* base-64 pad character. Default '=' for strict RFC compliance   */
-               utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true,
-               /* enable/disable utf8 encoding */
-               sha256_K;
+         var _favorites; // Index of presets by (geometry, tag key).

 
 

-             /* privileged (public) methods */
-             this.hex = function(s) {
-               return rstr2hex(rstr(s, utf8));
-             };
-             this.b64 = function(s) {
-               return rstr2b64(rstr(s, utf8), b64pad);
-             };
-             this.any = function(s, e) {
-               return rstr2any(rstr(s, utf8), e);
-             };
-             this.raw = function(s) {
-               return rstr(s, utf8);
-             };
-             this.hex_hmac = function(k, d) {
-               return rstr2hex(rstr_hmac(k, d));
-             };
-             this.b64_hmac = function(k, d) {
-               return rstr2b64(rstr_hmac(k, d), b64pad);
-             };
-             this.any_hmac = function(k, d, e) {
-               return rstr2any(rstr_hmac(k, d), e);
-             };
-             /**
-              * Perform a simple self-test to see if the VM is working
-              * @return {String} Hexadecimal hash sample
-              * @public
-              */
-             this.vm_test = function() {
-               return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-             };
-             /**
-              * Enable/disable uppercase hexadecimal returned string
-              * @param {boolean}
-              * @return {Object} this
-              * @public
-              */
-             this.setUpperCase = function(a) {
-               if (typeof a === 'boolean') {
-                 hexcase = a;
-               }
-               return this;
-             };
-             /**
-              * @description Defines a base64 pad string
-              * @param {string} Pad
-              * @return {Object} this
-              * @public
-              */
-             this.setPad = function(a) {
-               b64pad = a || b64pad;
-               return this;
-             };
-             /**
-              * Defines a base64 pad string
-              * @param {boolean}
-              * @return {Object} this
-              * @public
-              */
-             this.setUTF8 = function(a) {
-               if (typeof a === 'boolean') {
-                 utf8 = a;
-               }
-               return this;
-             };

 
 

-             // private methods
+         var _geometryIndex = {
+           point: {},
+           vertex: {},
+           line: {},
+           area: {},
+           relation: {}
+         };

 
 

-             /**
-              * Calculate the SHA-512 of a raw string
-              */
+         var _loadPromise;

 
 

-             function rstr(s, utf8) {
-               s = (utf8) ? utf8Encode(s) : s;
-               return binb2rstr(binb(rstr2binb(s), s.length * 8));
-             }
+         _this.ensureLoaded = function () {
+           if (_loadPromise) return _loadPromise;
+           return _loadPromise = Promise.all([_mainFileFetcher.get('preset_categories'), _mainFileFetcher.get('preset_defaults'), _mainFileFetcher.get('preset_presets'), _mainFileFetcher.get('preset_fields')]).then(function (vals) {
+             _this.merge({
+               categories: vals[0],
+               defaults: vals[1],
+               presets: vals[2],
+               fields: vals[3]
+             });

 
 

-             /**
-              * Calculate the HMAC-sha256 of a key and some data (raw strings)
-              */
+             osmSetAreaKeys(_this.areaKeys());
+             osmSetPointTags(_this.pointTags());
+             osmSetVertexTags(_this.vertexTags());
+           });
+         }; // `merge` accepts an object containing new preset data (all properties optional):
+         // {
+         //   fields: {},
+         //   presets: {},
+         //   categories: {},
+         //   defaults: {},
+         //   featureCollection: {}
+         //}

 
 

-             function rstr_hmac(key, data) {
-               key = (utf8) ? utf8Encode(key) : key;
-               data = (utf8) ? utf8Encode(data) : data;
-               var hash, i = 0,
-                 bkey = rstr2binb(key),
-                 ipad = Array(16),
-                 opad = Array(16);

 
 

-               if (bkey.length > 16) {
-                 bkey = binb(bkey, key.length * 8);
-               }
+         _this.merge = function (d) {
+           var newLocationSets = []; // Merge Fields
+
+           if (d.fields) {
+             Object.keys(d.fields).forEach(function (fieldID) {
+               var f = d.fields[fieldID];

 
 

-               for (; i < 16; i += 1) {
-                 ipad[i] = bkey[i] ^ 0x36363636;
-                 opad[i] = bkey[i] ^ 0x5C5C5C5C;
+               if (f) {
+                 // add or replace
+                 f = presetField(fieldID, f);
+                 if (f.locationSet) newLocationSets.push(f);
+                 _fields[fieldID] = f;
+               } else {
+                 // remove
+                 delete _fields[fieldID];

                }
                }

+             });
+           } // Merge Presets

 
 

-               hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
-               return binb2rstr(binb(opad.concat(hash), 512 + 256));
-             }

 
 

-             /*
-              * Main sha256 function, with its support functions
-              */
+           if (d.presets) {
+             Object.keys(d.presets).forEach(function (presetID) {
+               var p = d.presets[presetID];

 
 

-             function sha256_S(X, n) {
-               return (X >>> n) | (X << (32 - n));
-             }
+               if (p) {
+                 // add or replace
+                 var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);

 
 

-             function sha256_R(X, n) {
-               return (X >>> n);
-             }
+                 p = presetPreset(presetID, p, isAddable, _fields, _presets);
+                 if (p.locationSet) newLocationSets.push(p);
+                 _presets[presetID] = p;
+               } else {
+                 // remove (but not if it's a fallback)
+                 var existing = _presets[presetID];

 
 

-             function sha256_Ch(x, y, z) {
-               return ((x & y) ^ ((~x) & z));
-             }
+                 if (existing && !existing.isFallback()) {
+                   delete _presets[presetID];
+                 }
+               }
+             });
+           } // Merge Categories

 
 

-             function sha256_Maj(x, y, z) {
-               return ((x & y) ^ (x & z) ^ (y & z));
-             }

 
 

-             function sha256_Sigma0256(x) {
-               return (sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22));
-             }
+           if (d.categories) {
+             Object.keys(d.categories).forEach(function (categoryID) {
+               var c = d.categories[categoryID];

 
 

-             function sha256_Sigma1256(x) {
-               return (sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25));
-             }
+               if (c) {
+                 // add or replace
+                 c = presetCategory(categoryID, c, _presets);
+                 if (c.locationSet) newLocationSets.push(c);
+                 _categories[categoryID] = c;
+               } else {
+                 // remove
+                 delete _categories[categoryID];
+               }
+             });
+           } // Rebuild _this.collection after changing presets and categories

 
 

-             function sha256_Gamma0256(x) {
-               return (sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3));
-             }

 
 

-             function sha256_Gamma1256(x) {
-               return (sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10));
-             }
+           _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Defaults

 
 

-             sha256_K = [
-               1116352408, 1899447441, -1245643825, -373957723, 961987163, 1508970993, -1841331548, -1424204075, -670586216, 310598401, 607225278, 1426881987,
-               1925078388, -2132889090, -1680079193, -1046744716, -459576895, -272742522,
-               264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986, -1740746414, -1473132947, -1341970488, -1084653625, -958395405, -710438585,
-               113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291,
-               1695183700, 1986661051, -2117940946, -1838011259, -1564481375, -1474664885, -1035236496, -949202525, -778901479, -694614492, -200395387, 275423344,
-               430227734, 506948616, 659060556, 883997877, 958139571, 1322822218,
-               1537002063, 1747873779, 1955562222, 2024104815, -2067236844, -1933114872, -1866530822, -1538233109, -1090935817, -965641998
-             ];
+           if (d.defaults) {
+             Object.keys(d.defaults).forEach(function (geometry) {
+               var def = d.defaults[geometry];

 
 

-             function binb(m, l) {
-               var HASH = [1779033703, -1150833019, 1013904242, -1521486534,
-                 1359893119, -1694144372, 528734635, 1541459225
-               ];
-               var W = new Array(64);
-               var a, b, c, d, e, f, g, h;
-               var i, j, T1, T2;
-
-               /* append padding */
-               m[l >> 5] |= 0x80 << (24 - l % 32);
-               m[((l + 64 >> 9) << 4) + 15] = l;
-
-               for (i = 0; i < m.length; i += 16) {
-                 a = HASH[0];
-                 b = HASH[1];
-                 c = HASH[2];
-                 d = HASH[3];
-                 e = HASH[4];
-                 f = HASH[5];
-                 g = HASH[6];
-                 h = HASH[7];
-
-                 for (j = 0; j < 64; j += 1) {
-                   if (j < 16) {
-                     W[j] = m[j + i];
-                   } else {
-                     W[j] = safe_add(safe_add(safe_add(sha256_Gamma1256(W[j - 2]), W[j - 7]),
-                       sha256_Gamma0256(W[j - 15])), W[j - 16]);
-                   }
+               if (Array.isArray(def)) {
+                 // add or replace
+                 _defaults[geometry] = presetCollection(def.map(function (id) {
+                   return _presets[id] || _categories[id];
+                 }).filter(Boolean));
+               } else {
+                 // remove
+                 delete _defaults[geometry];
+               }
+             });
+           } // Rebuild universal fields array

 
 

-                   T1 = safe_add(safe_add(safe_add(safe_add(h, sha256_Sigma1256(e)), sha256_Ch(e, f, g)),
-                     sha256_K[j]), W[j]);
-                   T2 = safe_add(sha256_Sigma0256(a), sha256_Maj(a, b, c));
-                   h = g;
-                   g = f;
-                   f = e;
-                   e = safe_add(d, T1);
-                   d = c;
-                   c = b;
-                   b = a;
-                   a = safe_add(T1, T2);
-                 }

 
 

-                 HASH[0] = safe_add(a, HASH[0]);
-                 HASH[1] = safe_add(b, HASH[1]);
-                 HASH[2] = safe_add(c, HASH[2]);
-                 HASH[3] = safe_add(d, HASH[3]);
-                 HASH[4] = safe_add(e, HASH[4]);
-                 HASH[5] = safe_add(f, HASH[5]);
-                 HASH[6] = safe_add(g, HASH[6]);
-                 HASH[7] = safe_add(h, HASH[7]);
-               }
-               return HASH;
-             }
+           _universal = Object.values(_fields).filter(function (field) {
+             return field.universal;
+           }); // Reset all the preset fields - they'll need to be resolved again

 
 

-           },
+           Object.values(_presets).forEach(function (preset) {
+             return preset.resetFields();
+           }); // Rebuild geometry index

 
 

-           /**
-            * @class Hashes.SHA512
-            * @param {config}
-            *
-            * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined in FIPS 180-2
-            * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
-            * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-            * See http://pajhome.org.uk/crypt/md5 for details.
-            */
-           SHA512: function(options) {
-             /**
-              * Private properties configuration variables. You may need to tweak these to be compatible with
-              * the server-side, but the defaults work in most cases.
-              * @see this.setUpperCase() method
-              * @see this.setPad() method
-              */
-             var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false,
-               /* hexadecimal output case format. false - lowercase; true - uppercase  */
-               b64pad = (options && typeof options.pad === 'string') ? options.pad : '=',
-               /* base-64 pad character. Default '=' for strict RFC compliance   */
-               utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true,
-               /* enable/disable utf8 encoding */
-               sha512_k;
+           _geometryIndex = {
+             point: {},
+             vertex: {},
+             line: {},
+             area: {},
+             relation: {}
+           };

 
 

-             /* privileged (public) methods */
-             this.hex = function(s) {
-               return rstr2hex(rstr(s));
-             };
-             this.b64 = function(s) {
-               return rstr2b64(rstr(s), b64pad);
-             };
-             this.any = function(s, e) {
-               return rstr2any(rstr(s), e);
-             };
-             this.raw = function(s) {
-               return rstr(s);
-             };
-             this.hex_hmac = function(k, d) {
-               return rstr2hex(rstr_hmac(k, d));
-             };
-             this.b64_hmac = function(k, d) {
-               return rstr2b64(rstr_hmac(k, d), b64pad);
-             };
-             this.any_hmac = function(k, d, e) {
-               return rstr2any(rstr_hmac(k, d), e);
-             };
-             /**
-              * Perform a simple self-test to see if the VM is working
-              * @return {String} Hexadecimal hash sample
-              * @public
-              */
-             this.vm_test = function() {
-               return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-             };
-             /**
-              * @description Enable/disable uppercase hexadecimal returned string
-              * @param {boolean}
-              * @return {Object} this
-              * @public
-              */
-             this.setUpperCase = function(a) {
-               if (typeof a === 'boolean') {
-                 hexcase = a;
-               }
-               return this;
-             };
-             /**
-              * @description Defines a base64 pad string
-              * @param {string} Pad
-              * @return {Object} this
-              * @public
-              */
-             this.setPad = function(a) {
-               b64pad = a || b64pad;
-               return this;
-             };
-             /**
-              * @description Defines a base64 pad string
-              * @param {boolean}
-              * @return {Object} this
-              * @public
-              */
-             this.setUTF8 = function(a) {
-               if (typeof a === 'boolean') {
-                 utf8 = a;
-               }
-               return this;
-             };
+           _this.collection.forEach(function (preset) {
+             (preset.geometry || []).forEach(function (geometry) {
+               var g = _geometryIndex[geometry];

 
 

-             /* private methods */
+               for (var key in preset.tags) {
+                 g[key] = g[key] || {};
+                 var value = preset.tags[key];
+                 (g[key][value] = g[key][value] || []).push(preset);
+               }
+             });
+           }); // Merge Custom Features

 
 

-             /**
-              * Calculate the SHA-512 of a raw string
-              */

 
 

-             function rstr(s) {
-               s = (utf8) ? utf8Encode(s) : s;
-               return binb2rstr(binb(rstr2binb(s), s.length * 8));
-             }
-             /*
-              * Calculate the HMAC-SHA-512 of a key and some data (raw strings)
-              */
+           if (d.featureCollection && Array.isArray(d.featureCollection.features)) {
+             _mainLocations.mergeCustomGeoJSON(d.featureCollection);
+           } // Resolve all locationSet features.

 
 

-             function rstr_hmac(key, data) {
-               key = (utf8) ? utf8Encode(key) : key;
-               data = (utf8) ? utf8Encode(data) : data;

 
 

-               var hash, i = 0,
-                 bkey = rstr2binb(key),
-                 ipad = Array(32),
-                 opad = Array(32);
+           if (newLocationSets.length) {
+             _mainLocations.mergeLocationSets(newLocationSets);
+           }

 
 

-               if (bkey.length > 32) {
-                 bkey = binb(bkey, key.length * 8);
-               }
+           return _this;
+         };

 
 

-               for (; i < 32; i += 1) {
-                 ipad[i] = bkey[i] ^ 0x36363636;
-                 opad[i] = bkey[i] ^ 0x5C5C5C5C;
-               }
+         _this.match = function (entity, resolver) {
+           return resolver["transient"](entity, 'presetMatch', function () {
+             var geometry = entity.geometry(resolver); // Treat entities on addr:interpolation lines as points, not vertices - #3241

 
 

-               hash = binb(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
-               return binb2rstr(binb(opad.concat(hash), 1024 + 512));
+             if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
+               geometry = 'point';

              }
 
              }
 

-             /**
-              * Calculate the SHA-512 of an array of big-endian dwords, and a bit length
-              */
-
-             function binb(x, len) {
-               var j, i, l,
-                 W = new Array(80),
-                 hash = new Array(16),
-                 //Initial hash values
-                 H = [
-                   new int64(0x6a09e667, -205731576),
-                   new int64(-1150833019, -2067093701),
-                   new int64(0x3c6ef372, -23791573),
-                   new int64(-1521486534, 0x5f1d36f1),
-                   new int64(0x510e527f, -1377402159),
-                   new int64(-1694144372, 0x2b3e6c1f),
-                   new int64(0x1f83d9ab, -79577749),
-                   new int64(0x5be0cd19, 0x137e2179)
-                 ],
-                 T1 = new int64(0, 0),
-                 T2 = new int64(0, 0),
-                 a = new int64(0, 0),
-                 b = new int64(0, 0),
-                 c = new int64(0, 0),
-                 d = new int64(0, 0),
-                 e = new int64(0, 0),
-                 f = new int64(0, 0),
-                 g = new int64(0, 0),
-                 h = new int64(0, 0),
-                 //Temporary variables not specified by the document
-                 s0 = new int64(0, 0),
-                 s1 = new int64(0, 0),
-                 Ch = new int64(0, 0),
-                 Maj = new int64(0, 0),
-                 r1 = new int64(0, 0),
-                 r2 = new int64(0, 0),
-                 r3 = new int64(0, 0);
-
-               if (sha512_k === undefined) {
-                 //SHA512 constants
-                 sha512_k = [
-                   new int64(0x428a2f98, -685199838), new int64(0x71374491, 0x23ef65cd),
-                   new int64(-1245643825, -330482897), new int64(-373957723, -2121671748),
-                   new int64(0x3956c25b, -213338824), new int64(0x59f111f1, -1241133031),
-                   new int64(-1841331548, -1357295717), new int64(-1424204075, -630357736),
-                   new int64(-670586216, -1560083902), new int64(0x12835b01, 0x45706fbe),
-                   new int64(0x243185be, 0x4ee4b28c), new int64(0x550c7dc3, -704662302),
-                   new int64(0x72be5d74, -226784913), new int64(-2132889090, 0x3b1696b1),
-                   new int64(-1680079193, 0x25c71235), new int64(-1046744716, -815192428),
-                   new int64(-459576895, -1628353838), new int64(-272742522, 0x384f25e3),
-                   new int64(0xfc19dc6, -1953704523), new int64(0x240ca1cc, 0x77ac9c65),
-                   new int64(0x2de92c6f, 0x592b0275), new int64(0x4a7484aa, 0x6ea6e483),
-                   new int64(0x5cb0a9dc, -1119749164), new int64(0x76f988da, -2096016459),
-                   new int64(-1740746414, -295247957), new int64(-1473132947, 0x2db43210),
-                   new int64(-1341970488, -1728372417), new int64(-1084653625, -1091629340),
-                   new int64(-958395405, 0x3da88fc2), new int64(-710438585, -1828018395),
-                   new int64(0x6ca6351, -536640913), new int64(0x14292967, 0xa0e6e70),
-                   new int64(0x27b70a85, 0x46d22ffc), new int64(0x2e1b2138, 0x5c26c926),
-                   new int64(0x4d2c6dfc, 0x5ac42aed), new int64(0x53380d13, -1651133473),
-                   new int64(0x650a7354, -1951439906), new int64(0x766a0abb, 0x3c77b2a8),
-                   new int64(-2117940946, 0x47edaee6), new int64(-1838011259, 0x1482353b),
-                   new int64(-1564481375, 0x4cf10364), new int64(-1474664885, -1136513023),
-                   new int64(-1035236496, -789014639), new int64(-949202525, 0x654be30),
-                   new int64(-778901479, -688958952), new int64(-694614492, 0x5565a910),
-                   new int64(-200395387, 0x5771202a), new int64(0x106aa070, 0x32bbd1b8),
-                   new int64(0x19a4c116, -1194143544), new int64(0x1e376c08, 0x5141ab53),
-                   new int64(0x2748774c, -544281703), new int64(0x34b0bcb5, -509917016),
-                   new int64(0x391c0cb3, -976659869), new int64(0x4ed8aa4a, -482243893),
-                   new int64(0x5b9cca4f, 0x7763e373), new int64(0x682e6ff3, -692930397),
-                   new int64(0x748f82ee, 0x5defb2fc), new int64(0x78a5636f, 0x43172f60),
-                   new int64(-2067236844, -1578062990), new int64(-1933114872, 0x1a6439ec),
-                   new int64(-1866530822, 0x23631e28), new int64(-1538233109, -561857047),
-                   new int64(-1090935817, -1295615723), new int64(-965641998, -479046869),
-                   new int64(-903397682, -366583396), new int64(-779700025, 0x21c0c207),
-                   new int64(-354779690, -840897762), new int64(-176337025, -294727304),
-                   new int64(0x6f067aa, 0x72176fba), new int64(0xa637dc5, -1563912026),
-                   new int64(0x113f9804, -1090974290), new int64(0x1b710b35, 0x131c471b),
-                   new int64(0x28db77f5, 0x23047d84), new int64(0x32caab7b, 0x40c72493),
-                   new int64(0x3c9ebe0a, 0x15c9bebc), new int64(0x431d67c4, -1676669620),
-                   new int64(0x4cc5d4be, -885112138), new int64(0x597f299c, -60457430),
-                   new int64(0x5fcb6fab, 0x3ad6faec), new int64(0x6c44198c, 0x4a475817)
-                 ];
-               }
-
-               for (i = 0; i < 80; i += 1) {
-                 W[i] = new int64(0, 0);
-               }
-
-               // append padding to the source string. The format is described in the FIPS.
-               x[len >> 5] |= 0x80 << (24 - (len & 0x1f));
-               x[((len + 128 >> 10) << 5) + 31] = len;
-               l = x.length;
-               for (i = 0; i < l; i += 32) { //32 dwords is the block size
-                 int64copy(a, H[0]);
-                 int64copy(b, H[1]);
-                 int64copy(c, H[2]);
-                 int64copy(d, H[3]);
-                 int64copy(e, H[4]);
-                 int64copy(f, H[5]);
-                 int64copy(g, H[6]);
-                 int64copy(h, H[7]);
-
-                 for (j = 0; j < 16; j += 1) {
-                   W[j].h = x[i + 2 * j];
-                   W[j].l = x[i + 2 * j + 1];
-                 }
+             var entityExtent = entity.extent(resolver);
+             return _this.matchTags(entity.tags, geometry, entityExtent.center());
+           });
+         };

 
 

-                 for (j = 16; j < 80; j += 1) {
-                   //sigma1
-                   int64rrot(r1, W[j - 2], 19);
-                   int64revrrot(r2, W[j - 2], 29);
-                   int64shr(r3, W[j - 2], 6);
-                   s1.l = r1.l ^ r2.l ^ r3.l;
-                   s1.h = r1.h ^ r2.h ^ r3.h;
-                   //sigma0
-                   int64rrot(r1, W[j - 15], 1);
-                   int64rrot(r2, W[j - 15], 8);
-                   int64shr(r3, W[j - 15], 7);
-                   s0.l = r1.l ^ r2.l ^ r3.l;
-                   s0.h = r1.h ^ r2.h ^ r3.h;
-
-                   int64add4(W[j], s1, W[j - 7], s0, W[j - 16]);
-                 }
+         _this.matchTags = function (tags, geometry, loc) {
+           var keyIndex = _geometryIndex[geometry];
+           var bestScore = -1;
+           var bestMatch;
+           var matchCandidates = [];

 
 

-                 for (j = 0; j < 80; j += 1) {
-                   //Ch
-                   Ch.l = (e.l & f.l) ^ (~e.l & g.l);
-                   Ch.h = (e.h & f.h) ^ (~e.h & g.h);
-
-                   //Sigma1
-                   int64rrot(r1, e, 14);
-                   int64rrot(r2, e, 18);
-                   int64revrrot(r3, e, 9);
-                   s1.l = r1.l ^ r2.l ^ r3.l;
-                   s1.h = r1.h ^ r2.h ^ r3.h;
-
-                   //Sigma0
-                   int64rrot(r1, a, 28);
-                   int64revrrot(r2, a, 2);
-                   int64revrrot(r3, a, 7);
-                   s0.l = r1.l ^ r2.l ^ r3.l;
-                   s0.h = r1.h ^ r2.h ^ r3.h;
-
-                   //Maj
-                   Maj.l = (a.l & b.l) ^ (a.l & c.l) ^ (b.l & c.l);
-                   Maj.h = (a.h & b.h) ^ (a.h & c.h) ^ (b.h & c.h);
-
-                   int64add5(T1, h, s1, Ch, sha512_k[j], W[j]);
-                   int64add(T2, s0, Maj);
-
-                   int64copy(h, g);
-                   int64copy(g, f);
-                   int64copy(f, e);
-                   int64add(e, d, T1);
-                   int64copy(d, c);
-                   int64copy(c, b);
-                   int64copy(b, a);
-                   int64add(a, T1, T2);
-                 }
-                 int64add(H[0], H[0], a);
-                 int64add(H[1], H[1], b);
-                 int64add(H[2], H[2], c);
-                 int64add(H[3], H[3], d);
-                 int64add(H[4], H[4], e);
-                 int64add(H[5], H[5], f);
-                 int64add(H[6], H[6], g);
-                 int64add(H[7], H[7], h);
+           for (var k in tags) {
+             var indexMatches = [];
+             var valueIndex = keyIndex[k];
+             if (!valueIndex) continue;
+             var keyValueMatches = valueIndex[tags[k]];
+             if (keyValueMatches) indexMatches.push.apply(indexMatches, _toConsumableArray(keyValueMatches));
+             var keyStarMatches = valueIndex['*'];
+             if (keyStarMatches) indexMatches.push.apply(indexMatches, _toConsumableArray(keyStarMatches));
+             if (indexMatches.length === 0) continue;
+
+             for (var i = 0; i < indexMatches.length; i++) {
+               var candidate = indexMatches[i];
+               var score = candidate.matchScore(tags);
+
+               if (score === -1) {
+                 continue;

                }
 
                }
 

-               //represent the hash as an array of 32-bit dwords
-               for (i = 0; i < 8; i += 1) {
-                 hash[2 * i] = H[i].h;
-                 hash[2 * i + 1] = H[i].l;
+               matchCandidates.push({
+                 score: score,
+                 candidate: candidate
+               });
+
+               if (score > bestScore) {
+                 bestScore = score;
+                 bestMatch = candidate;

                }
                }

-               return hash;

              }
              }

+           }

 
 

-             //A constructor for 64-bit numbers
+           if (bestMatch && bestMatch.locationSetID && bestMatch.locationSetID !== '+[Q2]' && Array.isArray(loc)) {
+             var validLocations = _mainLocations.locationsAt(loc);

 
 

-             function int64(h, l) {
-               this.h = h;
-               this.l = l;
-               //this.toString = int64toString;
-             }
+             if (!validLocations[bestMatch.locationSetID]) {
+               matchCandidates.sort(function (a, b) {
+                 return a.score < b.score ? 1 : -1;
+               });

 
 

-             //Copies src into dst, assuming both are 64-bit numbers
+               for (var _i = 0; _i < matchCandidates.length; _i++) {
+                 var candidateScore = matchCandidates[_i];

 
 

-             function int64copy(dst, src) {
-               dst.h = src.h;
-               dst.l = src.l;
+                 if (!candidateScore.candidate.locationSetID || validLocations[candidateScore.candidate.locationSetID]) {
+                   bestMatch = candidateScore.candidate;
+                   bestScore = candidateScore.score;
+                   break;
+                 }
+               }

              }
              }

+           } // If any part of an address is present, allow fallback to "Address" preset - #4353

 
 

-             //Right-rotates a 64-bit number by shift
-             //Won't handle cases of shift>=32
-             //The function revrrot() is for that

 
 

-             function int64rrot(dst, x, shift) {
-               dst.l = (x.l >>> shift) | (x.h << (32 - shift));
-               dst.h = (x.h >>> shift) | (x.l << (32 - shift));
+           if (!bestMatch || bestMatch.isFallback()) {
+             for (var _k in tags) {
+               if (/^addr:/.test(_k) && keyIndex['addr:*'] && keyIndex['addr:*']['*']) {
+                 bestMatch = keyIndex['addr:*']['*'][0];
+                 break;
+               }

              }
              }

+           }

 
 

-             //Reverses the dwords of the source and then rotates right by shift.
-             //This is equivalent to rotation by 32+shift
+           return bestMatch || _this.fallback(geometry);
+         };

 
 

-             function int64revrrot(dst, x, shift) {
-               dst.l = (x.h >>> shift) | (x.l << (32 - shift));
-               dst.h = (x.l >>> shift) | (x.h << (32 - shift));
-             }
+         _this.allowsVertex = function (entity, resolver) {
+           if (entity.type !== 'node') return false;
+           if (Object.keys(entity.tags).length === 0) return true;
+           return resolver["transient"](entity, 'vertexMatch', function () {
+             // address lines allow vertices to act as standalone points
+             if (entity.isOnAddressLine(resolver)) return true;
+             var geometries = osmNodeGeometriesForTags(entity.tags);
+             if (geometries.vertex) return true;
+             if (geometries.point) return false; // allow vertices for unspecified points

 
 

-             //Bitwise-shifts right a 64-bit number by shift
-             //Won't handle shift>=32, but it's never needed in SHA512
+             return true;
+           });
+         }; // Because of the open nature of tagging, iD will never have a complete
+         // list of tags used in OSM, so we want it to have logic like "assume
+         // that a closed way with an amenity tag is an area, unless the amenity
+         // is one of these specific types". This function computes a structure
+         // that allows testing of such conditions, based on the presets designated
+         // as as supporting (or not supporting) the area geometry.
+         //
+         // The returned object L is a keeplist/discardlist of tags. A closed way
+         // with a tag (k, v) is considered to be an area if `k in L && !(v in L[k])`
+         // (see `Way#isArea()`). In other words, the keys of L form the keeplist,
+         // and the subkeys form the discardlist.

 
 

-             function int64shr(dst, x, shift) {
-               dst.l = (x.l >>> shift) | (x.h << (32 - shift));
-               dst.h = (x.h >>> shift);
-             }

 
 

-             //Adds two 64-bit numbers
-             //Like the original implementation, does not rely on 32-bit operations
+         _this.areaKeys = function () {
+           // The ignore list is for keys that imply lines. (We always add `area=yes` for exceptions)
+           var ignore = ['barrier', 'highway', 'footway', 'railway', 'junction', 'type'];
+           var areaKeys = {}; // ignore name-suggestion-index and deprecated presets

 
 

-             function int64add(dst, x, y) {
-               var w0 = (x.l & 0xffff) + (y.l & 0xffff);
-               var w1 = (x.l >>> 16) + (y.l >>> 16) + (w0 >>> 16);
-               var w2 = (x.h & 0xffff) + (y.h & 0xffff) + (w1 >>> 16);
-               var w3 = (x.h >>> 16) + (y.h >>> 16) + (w2 >>> 16);
-               dst.l = (w0 & 0xffff) | (w1 << 16);
-               dst.h = (w2 & 0xffff) | (w3 << 16);
-             }
+           var presets = _this.collection.filter(function (p) {
+             return !p.suggestion && !p.replacement;
+           }); // keeplist

 
 

-             //Same, except with 4 addends. Works faster than adding them one by one.

 
 

-             function int64add4(dst, a, b, c, d) {
-               var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff);
-               var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (w0 >>> 16);
-               var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (w1 >>> 16);
-               var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (w2 >>> 16);
-               dst.l = (w0 & 0xffff) | (w1 << 16);
-               dst.h = (w2 & 0xffff) | (w3 << 16);
-             }
+           presets.forEach(function (p) {
+             var keys = p.tags && Object.keys(p.tags);
+             var key = keys && keys.length && keys[0]; // pick the first tag

 
 

-             //Same, except with 5 addends
+             if (!key) return;
+             if (ignore.indexOf(key) !== -1) return;

 
 

-             function int64add5(dst, a, b, c, d, e) {
-               var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff) + (e.l & 0xffff),
-                 w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (e.l >>> 16) + (w0 >>> 16),
-                 w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (e.h & 0xffff) + (w1 >>> 16),
-                 w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (e.h >>> 16) + (w2 >>> 16);
-               dst.l = (w0 & 0xffff) | (w1 << 16);
-               dst.h = (w2 & 0xffff) | (w3 << 16);
+             if (p.geometry.indexOf('area') !== -1) {
+               // probably an area..
+               areaKeys[key] = areaKeys[key] || {};

              }
              }

-           },
-           /**
-            * @class Hashes.RMD160
-            * @constructor
-            * @param {Object} [config]
-            *
-            * A JavaScript implementation of the RIPEMD-160 Algorithm
-            * Version 2.2 Copyright Jeremy Lin, Paul Johnston 2000 - 2009.
-            * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-            * See http://pajhome.org.uk/crypt/md5 for details.
-            * Also http://www.ocf.berkeley.edu/~jjlin/jsotp/
-            */
-           RMD160: function(options) {
-             /**
-              * Private properties configuration variables. You may need to tweak these to be compatible with
-              * the server-side, but the defaults work in most cases.
-              * @see this.setUpperCase() method
-              * @see this.setPad() method
-              */
-             var hexcase = (options && typeof options.uppercase === 'boolean') ? options.uppercase : false,
-               /* hexadecimal output case format. false - lowercase; true - uppercase  */
-               b64pad = (options && typeof options.pad === 'string') ? options.pa : '=',
-               /* base-64 pad character. Default '=' for strict RFC compliance   */
-               utf8 = (options && typeof options.utf8 === 'boolean') ? options.utf8 : true,
-               /* enable/disable utf8 encoding */
-               rmd160_r1 = [
-                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
-                 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8,
-                 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12,
-                 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2,
-                 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13
-               ],
-               rmd160_r2 = [
-                 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12,
-                 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2,
-                 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13,
-                 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14,
-                 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11
-               ],
-               rmd160_s1 = [
-                 11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8,
-                 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12,
-                 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5,
-                 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12,
-                 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6
-               ],
-               rmd160_s2 = [
-                 8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6,
-                 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11,
-                 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5,
-                 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8,
-                 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11
-               ];
-
-             /* privileged (public) methods */
-             this.hex = function(s) {
-               return rstr2hex(rstr(s));
-             };
-             this.b64 = function(s) {
-               return rstr2b64(rstr(s), b64pad);
-             };
-             this.any = function(s, e) {
-               return rstr2any(rstr(s), e);
-             };
-             this.raw = function(s) {
-               return rstr(s);
-             };
-             this.hex_hmac = function(k, d) {
-               return rstr2hex(rstr_hmac(k, d));
-             };
-             this.b64_hmac = function(k, d) {
-               return rstr2b64(rstr_hmac(k, d), b64pad);
-             };
-             this.any_hmac = function(k, d, e) {
-               return rstr2any(rstr_hmac(k, d), e);
-             };
-             /**
-              * Perform a simple self-test to see if the VM is working
-              * @return {String} Hexadecimal hash sample
-              * @public
-              */
-             this.vm_test = function() {
-               return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-             };
-             /**
-              * @description Enable/disable uppercase hexadecimal returned string
-              * @param {boolean}
-              * @return {Object} this
-              * @public
-              */
-             this.setUpperCase = function(a) {
-               if (typeof a === 'boolean') {
-                 hexcase = a;
-               }
-               return this;
-             };
-             /**
-              * @description Defines a base64 pad string
-              * @param {string} Pad
-              * @return {Object} this
-              * @public
-              */
-             this.setPad = function(a) {
-               if (typeof a !== 'undefined') {
-                 b64pad = a;
-               }
-               return this;
-             };
-             /**
-              * @description Defines a base64 pad string
-              * @param {boolean}
-              * @return {Object} this
-              * @public
-              */
-             this.setUTF8 = function(a) {
-               if (typeof a === 'boolean') {
-                 utf8 = a;
-               }
-               return this;
-             };
+           }); // discardlist

 
 

-             /* private methods */
+           presets.forEach(function (p) {
+             var key;

 
 

-             /**
-              * Calculate the rmd160 of a raw string
-              */
+             for (key in p.addTags) {
+               // examine all addTags to get a better sense of what can be tagged on lines - #6800
+               var value = p.addTags[key];

 
 

-             function rstr(s) {
-               s = (utf8) ? utf8Encode(s) : s;
-               return binl2rstr(binl(rstr2binl(s), s.length * 8));
+               if (key in areaKeys && // probably an area...
+               p.geometry.indexOf('line') !== -1 && // but sometimes a line
+               value !== '*') {
+                 areaKeys[key][value] = true;
+               }

              }
              }

+           });
+           return areaKeys;
+         };

 
 

-             /**
-              * Calculate the HMAC-rmd160 of a key and some data (raw strings)
-              */
+         _this.pointTags = function () {
+           return _this.collection.reduce(function (pointTags, d) {
+             // ignore name-suggestion-index, deprecated, and generic presets
+             if (d.suggestion || d.replacement || d.searchable === false) return pointTags; // only care about the primary tag

 
 

-             function rstr_hmac(key, data) {
-               key = (utf8) ? utf8Encode(key) : key;
-               data = (utf8) ? utf8Encode(data) : data;
-               var i, hash,
-                 bkey = rstr2binl(key),
-                 ipad = Array(16),
-                 opad = Array(16);
+             var keys = d.tags && Object.keys(d.tags);
+             var key = keys && keys.length && keys[0]; // pick the first tag

 
 

-               if (bkey.length > 16) {
-                 bkey = binl(bkey, key.length * 8);
-               }
+             if (!key) return pointTags; // if this can be a point

 
 

-               for (i = 0; i < 16; i += 1) {
-                 ipad[i] = bkey[i] ^ 0x36363636;
-                 opad[i] = bkey[i] ^ 0x5C5C5C5C;
-               }
-               hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
-               return binl2rstr(binl(opad.concat(hash), 512 + 160));
+             if (d.geometry.indexOf('point') !== -1) {
+               pointTags[key] = pointTags[key] || {};
+               pointTags[key][d.tags[key]] = true;

              }
 
              }
 

-             /**
-              * Convert an array of little-endian words to a string
-              */
+             return pointTags;
+           }, {});
+         };

 
 

-             function binl2rstr(input) {
-               var i, output = '',
-                 l = input.length * 32;
-               for (i = 0; i < l; i += 8) {
-                 output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF);
-               }
-               return output;
-             }
+         _this.vertexTags = function () {
+           return _this.collection.reduce(function (vertexTags, d) {
+             // ignore name-suggestion-index, deprecated, and generic presets
+             if (d.suggestion || d.replacement || d.searchable === false) return vertexTags; // only care about the primary tag

 
 

-             /**
-              * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
-              */
+             var keys = d.tags && Object.keys(d.tags);
+             var key = keys && keys.length && keys[0]; // pick the first tag

 
 

-             function binl(x, len) {
-               var T, j, i, l,
-                 h0 = 0x67452301,
-                 h1 = 0xefcdab89,
-                 h2 = 0x98badcfe,
-                 h3 = 0x10325476,
-                 h4 = 0xc3d2e1f0,
-                 A1, B1, C1, D1, E1,
-                 A2, B2, C2, D2, E2;
-
-               /* append padding */
-               x[len >> 5] |= 0x80 << (len % 32);
-               x[(((len + 64) >>> 9) << 4) + 14] = len;
-               l = x.length;
-
-               for (i = 0; i < l; i += 16) {
-                 A1 = A2 = h0;
-                 B1 = B2 = h1;
-                 C1 = C2 = h2;
-                 D1 = D2 = h3;
-                 E1 = E2 = h4;
-                 for (j = 0; j <= 79; j += 1) {
-                   T = safe_add(A1, rmd160_f(j, B1, C1, D1));
-                   T = safe_add(T, x[i + rmd160_r1[j]]);
-                   T = safe_add(T, rmd160_K1(j));
-                   T = safe_add(bit_rol(T, rmd160_s1[j]), E1);
-                   A1 = E1;
-                   E1 = D1;
-                   D1 = bit_rol(C1, 10);
-                   C1 = B1;
-                   B1 = T;
-                   T = safe_add(A2, rmd160_f(79 - j, B2, C2, D2));
-                   T = safe_add(T, x[i + rmd160_r2[j]]);
-                   T = safe_add(T, rmd160_K2(j));
-                   T = safe_add(bit_rol(T, rmd160_s2[j]), E2);
-                   A2 = E2;
-                   E2 = D2;
-                   D2 = bit_rol(C2, 10);
-                   C2 = B2;
-                   B2 = T;
-                 }
+             if (!key) return vertexTags; // if this can be a vertex

 
 

-                 T = safe_add(h1, safe_add(C1, D2));
-                 h1 = safe_add(h2, safe_add(D1, E2));
-                 h2 = safe_add(h3, safe_add(E1, A2));
-                 h3 = safe_add(h4, safe_add(A1, B2));
-                 h4 = safe_add(h0, safe_add(B1, C2));
-                 h0 = T;
-               }
-               return [h0, h1, h2, h3, h4];
+             if (d.geometry.indexOf('vertex') !== -1) {
+               vertexTags[key] = vertexTags[key] || {};
+               vertexTags[key][d.tags[key]] = true;

              }
 
              }
 

-             // specific algorithm methods
+             return vertexTags;
+           }, {});
+         };
+
+         _this.field = function (id) {
+           return _fields[id];
+         };

 
 

-             function rmd160_f(j, x, y, z) {
-               return (0 <= j && j <= 15) ? (x ^ y ^ z) :
-                 (16 <= j && j <= 31) ? (x & y) | (~x & z) :
-                 (32 <= j && j <= 47) ? (x | ~y) ^ z :
-                 (48 <= j && j <= 63) ? (x & z) | (y & ~z) :
-                 (64 <= j && j <= 79) ? x ^ (y | ~z) :
-                 'rmd160_f: j out of range';
-             }
+         _this.universal = function () {
+           return _universal;
+         };

 
 

-             function rmd160_K1(j) {
-               return (0 <= j && j <= 15) ? 0x00000000 :
-                 (16 <= j && j <= 31) ? 0x5a827999 :
-                 (32 <= j && j <= 47) ? 0x6ed9eba1 :
-                 (48 <= j && j <= 63) ? 0x8f1bbcdc :
-                 (64 <= j && j <= 79) ? 0xa953fd4e :
-                 'rmd160_K1: j out of range';
-             }
+         _this.defaults = function (geometry, n, startWithRecents, loc) {
+           var recents = [];

 
 

-             function rmd160_K2(j) {
-               return (0 <= j && j <= 15) ? 0x50a28be6 :
-                 (16 <= j && j <= 31) ? 0x5c4dd124 :
-                 (32 <= j && j <= 47) ? 0x6d703ef3 :
-                 (48 <= j && j <= 63) ? 0x7a6d76e9 :
-                 (64 <= j && j <= 79) ? 0x00000000 :
-                 'rmd160_K2: j out of range';
-             }
+           if (startWithRecents) {
+             recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);

            }
            }

-         };

 
 

-         // exposes Hashes
-         (function(window, undefined$1) {
-           var freeExports = false;
-           {
-             freeExports = exports;
-             if (exports && typeof commonjsGlobal === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
-               window = commonjsGlobal;
-             }
-           }
+           var defaults;

 
 

-           if (typeof undefined$1 === 'function' && typeof undefined$1.amd === 'object' && undefined$1.amd) {
-             // define as an anonymous module, so, through path mapping, it can be aliased
-             undefined$1(function() {
-               return Hashes;
-             });
-           } else if (freeExports) {
-             // in Node.js or RingoJS v0.8.0+
-             if ( module && module.exports === freeExports) {
-               module.exports = Hashes;
-             }
-             // in Narwhal or RingoJS v0.7.0-
-             else {
-               freeExports.Hashes = Hashes;
-             }
+           if (_addablePresetIDs) {
+             defaults = Array.from(_addablePresetIDs).map(function (id) {
+               var preset = _this.item(id);
+
+               if (preset && preset.matchGeometry(geometry)) return preset;
+               return null;
+             }).filter(Boolean);

            } else {
            } else {

-             // in a browser or Rhino
-             window.Hashes = Hashes;
+             defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));

            }
            }

-         }(this));
-       }()); // IIFE
-       });

 
 

-       var immutable = extend$2;
+           var result = presetCollection(utilArrayUniq(recents.concat(defaults)).slice(0, n - 1));

 
 

-       var hasOwnProperty$3 = Object.prototype.hasOwnProperty;
+           if (Array.isArray(loc)) {
+             var validLocations = _mainLocations.locationsAt(loc);
+             result.collection = result.collection.filter(function (a) {
+               return !a.locationSetID || validLocations[a.locationSetID];
+             });
+           }

 
 

-       function extend$2() {
-           var arguments$1 = arguments;
+           return result;
+         }; // pass a Set of addable preset ids

 
 

-           var target = {};

 
 

-           for (var i = 0; i < arguments.length; i++) {
-               var source = arguments$1[i];
+         _this.addablePresetIDs = function (val) {
+           if (!arguments.length) return _addablePresetIDs; // accept and convert arrays

 
 

-               for (var key in source) {
-                   if (hasOwnProperty$3.call(source, key)) {
-                       target[key] = source[key];
-                   }
-               }
+           if (Array.isArray(val)) val = new Set(val);
+           _addablePresetIDs = val;
+
+           if (_addablePresetIDs) {
+             // reset all presets
+             _this.collection.forEach(function (p) {
+               // categories aren't addable
+               if (p.addable) p.addable(_addablePresetIDs.has(p.id));
+             });
+           } else {
+             _this.collection.forEach(function (p) {
+               if (p.addable) p.addable(true);
+             });

            }
 
            }
 

-           return target
-       }
+           return _this;
+         };

 
 

-       var sha1 = new hashes.SHA1();
+         _this.recent = function () {
+           return presetCollection(utilArrayUniq(_this.getRecents().map(function (d) {
+             return d.preset;
+           })));
+         };

 
 

-       var ohauth = {};
+         function RibbonItem(preset, source) {
+           var item = {};
+           item.preset = preset;
+           item.source = source;

 
 

-       ohauth.qsString = function(obj) {
-           return Object.keys(obj).sort().map(function(key) {
-               return ohauth.percentEncode(key) + '=' +
-                   ohauth.percentEncode(obj[key]);
-           }).join('&');
-       };
+           item.isFavorite = function () {
+             return item.source === 'favorite';
+           };

 
 

-       ohauth.stringQs = function(str) {
-           return str.split('&').filter(function (pair) {
-               return pair !== '';
-           }).reduce(function(obj, pair){
-               var parts = pair.split('=');
-               obj[decodeURIComponent(parts[0])] = (null === parts[1]) ?
-                   '' : decodeURIComponent(parts[1]);
-               return obj;
-           }, {});
-       };
+           item.isRecent = function () {
+             return item.source === 'recent';
+           };

 
 

-       ohauth.rawxhr = function(method, url, data, headers, callback) {
-           var xhr = new XMLHttpRequest(),
-               twoHundred = /^20\d$/;
-           xhr.onreadystatechange = function() {
-               if (4 === xhr.readyState && 0 !== xhr.status) {
-                   if (twoHundred.test(xhr.status)) { callback(null, xhr); }
-                   else { return callback(xhr, null); }
-               }
+           item.matches = function (preset) {
+             return item.preset.id === preset.id;

            };
            };

-           xhr.onerror = function(e) { return callback(e, null); };
-           xhr.open(method, url, true);
-           for (var h in headers) { xhr.setRequestHeader(h, headers[h]); }
-           xhr.send(data);
-           return xhr;
-       };

 
 

-       ohauth.xhr = function(method, url, auth, data, options, callback) {
-           var headers = (options && options.header) || {
-               'Content-Type': 'application/x-www-form-urlencoded'
+           item.minified = function () {
+             return {
+               pID: item.preset.id
+             };

            };
            };

-           headers.Authorization = 'OAuth ' + ohauth.authHeader(auth);
-           return ohauth.rawxhr(method, url, data, headers, callback);
-       };

 
 

-       ohauth.nonce = function() {
-           for (var o = ''; o.length < 6;) {
-               o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
+           return item;
+         }
+
+         function ribbonItemForMinified(d, source) {
+           if (d && d.pID) {
+             var preset = _this.item(d.pID);
+
+             if (!preset) return null;
+             return RibbonItem(preset, source);

            }
            }

-           return o;
-       };

 
 

-       ohauth.authHeader = function(obj) {
-           return Object.keys(obj).sort().map(function(key) {
-               return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
-           }).join(', ');
-       };
+           return null;
+         }

 
 

-       ohauth.timestamp = function() { return ~~((+new Date()) / 1000); };
+         _this.getGenericRibbonItems = function () {
+           return ['point', 'line', 'area'].map(function (id) {
+             return RibbonItem(_this.item(id), 'generic');
+           });
+         };

 
 

-       ohauth.percentEncode = function(s) {
-           return encodeURIComponent(s)
-               .replace(/\!/g, '%21').replace(/\'/g, '%27')
-               .replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
-       };
+         _this.getAddable = function () {
+           if (!_addablePresetIDs) return [];
+           return _addablePresetIDs.map(function (id) {
+             var preset = _this.item(id);

 
 

-       ohauth.baseString = function(method, url, params) {
-           if (params.oauth_signature) { delete params.oauth_signature; }
-           return [
-               method,
-               ohauth.percentEncode(url),
-               ohauth.percentEncode(ohauth.qsString(params))].join('&');
-       };
+             if (preset) return RibbonItem(preset, 'addable');
+             return null;
+           }).filter(Boolean);
+         };

 
 

-       ohauth.signature = function(oauth_secret, token_secret, baseString) {
-           return sha1.b64_hmac(
-               ohauth.percentEncode(oauth_secret) + '&' +
-               ohauth.percentEncode(token_secret),
-               baseString);
-       };
+         function setRecents(items) {
+           _recents = items;
+           var minifiedItems = items.map(function (d) {
+             return d.minified();
+           });
+           corePreferences('preset_recents', JSON.stringify(minifiedItems));
+           dispatch.call('recentsChange');
+         }

 
 

-       /**
-        * Takes an options object for configuration (consumer_key,
-        * consumer_secret, version, signature_method, token, token_secret)
-        * and returns a function that generates the Authorization header
-        * for given data.
-        *
-        * The returned function takes these parameters:
-        * - method: GET/POST/...
-        * - uri: full URI with protocol, port, path and query string
-        * - extra_params: any extra parameters (that are passed in the POST data),
-        *   can be an object or a from-urlencoded string.
-        *
-        * Returned function returns full OAuth header with "OAuth" string in it.
-        */
+         _this.getRecents = function () {
+           if (!_recents) {
+             // fetch from local storage
+             _recents = (JSON.parse(corePreferences('preset_recents')) || []).reduce(function (acc, d) {
+               var item = ribbonItemForMinified(d, 'recent');
+               if (item && item.preset.addable()) acc.push(item);
+               return acc;
+             }, []);
+           }

 
 

-       ohauth.headerGenerator = function(options) {
-           options = options || {};
-           var consumer_key = options.consumer_key || '',
-               consumer_secret = options.consumer_secret || '',
-               signature_method = options.signature_method || 'HMAC-SHA1',
-               version = options.version || '1.0',
-               token = options.token || '',
-               token_secret = options.token_secret || '';
+           return _recents;
+         };

 
 

-           return function(method, uri, extra_params) {
-               method = method.toUpperCase();
-               if (typeof extra_params === 'string' && extra_params.length > 0) {
-                   extra_params = ohauth.stringQs(extra_params);
-               }
+         _this.addRecent = function (preset, besidePreset, after) {
+           var recents = _this.getRecents();

 
 

-               var uri_parts = uri.split('?', 2),
-               base_uri = uri_parts[0];
+           var beforeItem = _this.recentMatching(besidePreset);
+
+           var toIndex = recents.indexOf(beforeItem);
+           if (after) toIndex += 1;
+           var newItem = RibbonItem(preset, 'recent');
+           recents.splice(toIndex, 0, newItem);
+           setRecents(recents);
+         };

 
 

-               var query_params = uri_parts.length === 2 ?
-                   ohauth.stringQs(uri_parts[1]) : {};
+         _this.removeRecent = function (preset) {
+           var item = _this.recentMatching(preset);

 
 

-               var oauth_params = {
-                   oauth_consumer_key: consumer_key,
-                   oauth_signature_method: signature_method,
-                   oauth_version: version,
-                   oauth_timestamp: ohauth.timestamp(),
-                   oauth_nonce: ohauth.nonce()
-               };
+           if (item) {
+             var items = _this.getRecents();
+
+             items.splice(items.indexOf(item), 1);
+             setRecents(items);
+           }
+         };

 
 

-               if (token) { oauth_params.oauth_token = token; }
+         _this.recentMatching = function (preset) {
+           var items = _this.getRecents();

 
 

-               var all_params = immutable({}, oauth_params, query_params, extra_params),
-                   base_str = ohauth.baseString(method, base_uri, all_params);
+           for (var i in items) {
+             if (items[i].matches(preset)) {
+               return items[i];
+             }
+           }

 
 

-               oauth_params.oauth_signature = ohauth.signature(consumer_secret, token_secret, base_str);
+           return null;
+         };

 
 

-               return 'OAuth ' + ohauth.authHeader(oauth_params);
-           };
-       };
+         _this.moveItem = function (items, fromIndex, toIndex) {
+           if (fromIndex === toIndex || fromIndex < 0 || toIndex < 0 || fromIndex >= items.length || toIndex >= items.length) return null;
+           items.splice(toIndex, 0, items.splice(fromIndex, 1)[0]);
+           return items;
+         };

 
 

-       var ohauth_1 = ohauth;
+         _this.moveRecent = function (item, beforeItem) {
+           var recents = _this.getRecents();

 
 

-       var resolveUrl$1 = createCommonjsModule(function (module, exports) {
-       // Copyright 2014 Simon Lydell
-       // X11 (“MIT”) Licensed. (See LICENSE.)
+           var fromIndex = recents.indexOf(item);
+           var toIndex = recents.indexOf(beforeItem);

 
 

-       void (function(root, factory) {
-         {
-           module.exports = factory();
-         }
-       }(commonjsGlobal, function() {
+           var items = _this.moveItem(recents, fromIndex, toIndex);

 
 

-         function resolveUrl(/* ...urls */) {
-           var arguments$1 = arguments;
+           if (items) setRecents(items);
+         };

 
 

-           var numUrls = arguments.length;
+         _this.setMostRecent = function (preset) {
+           if (preset.searchable === false) return;

 
 

-           if (numUrls === 0) {
-             throw new Error("resolveUrl requires at least one argument; got none.")
-           }
+           var items = _this.getRecents();

 
 

-           var base = document.createElement("base");
-           base.href = arguments[0];
+           var item = _this.recentMatching(preset);

 
 

-           if (numUrls === 1) {
-             return base.href
-           }
+           if (item) {
+             items.splice(items.indexOf(item), 1);
+           } else {
+             item = RibbonItem(preset, 'recent');
+           } // remove the last recent (first in, first out)

 
 

-           var head = document.getElementsByTagName("head")[0];
-           head.insertBefore(base, head.firstChild);

 
 

-           var a = document.createElement("a");
-           var resolved;
+           while (items.length >= MAXRECENTS) {
+             items.pop();
+           } // prepend array
+

 
 

-           for (var index = 1; index < numUrls; index++) {
-             a.href = arguments$1[index];
-             resolved = a.href;
-             base.href = resolved;
-           }
+           items.unshift(item);
+           setRecents(items);
+         };

 
 

-           head.removeChild(base);
+         function setFavorites(items) {
+           _favorites = items;
+           var minifiedItems = items.map(function (d) {
+             return d.minified();
+           });
+           corePreferences('preset_favorites', JSON.stringify(minifiedItems)); // call update

 
 

-           return resolved
+           dispatch.call('favoritePreset');

          }
 
          }
 

-         return resolveUrl
+         _this.addFavorite = function (preset, besidePreset, after) {
+           var favorites = _this.getFavorites();

 
 

-       }));
-       });
+           var beforeItem = _this.favoriteMatching(besidePreset);

 
 

-       var assign$1 = make_assign();
-       var create$8 = make_create();
-       var trim = make_trim();
-       var Global = (typeof window !== 'undefined' ? window : commonjsGlobal);
-
-       var util = {
-               assign: assign$1,
-               create: create$8,
-               trim: trim,
-               bind: bind$3,
-               slice: slice$5,
-               each: each,
-               map: map$5,
-               pluck: pluck,
-               isList: isList,
-               isFunction: isFunction$2,
-               isObject: isObject$2,
-               Global: Global
-       };
+           var toIndex = favorites.indexOf(beforeItem);
+           if (after) toIndex += 1;
+           var newItem = RibbonItem(preset, 'favorite');
+           favorites.splice(toIndex, 0, newItem);
+           setFavorites(favorites);
+         };

 
 

-       function make_assign() {
-               if (Object.assign) {
-                       return Object.assign
-               } else {
-                       return function shimAssign(obj, props1, props2, etc) {
-                               var arguments$1 = arguments;
-
-                               for (var i = 1; i < arguments.length; i++) {
-                                       each(Object(arguments$1[i]), function(val, key) {
-                                               obj[key] = val;
-                                       });
-                               }                       
-                               return obj
-                       }
-               }
-       }
+         _this.toggleFavorite = function (preset) {
+           var favs = _this.getFavorites();

 
 

-       function make_create() {
-               if (Object.create) {
-                       return function create(obj, assignProps1, assignProps2, etc) {
-                               var assignArgsList = slice$5(arguments, 1);
-                               return assign$1.apply(this, [Object.create(obj)].concat(assignArgsList))
-                       }
-               } else {
-                       function F() {} // eslint-disable-line no-inner-declarations
-                       return function create(obj, assignProps1, assignProps2, etc) {
-                               var assignArgsList = slice$5(arguments, 1);
-                               F.prototype = obj;
-                               return assign$1.apply(this, [new F()].concat(assignArgsList))
-                       }
-               }
-       }
+           var favorite = _this.favoriteMatching(preset);

 
 

-       function make_trim() {
-               if (String.prototype.trim) {
-                       return function trim(str) {
-                               return String.prototype.trim.call(str)
-                       }
-               } else {
-                       return function trim(str) {
-                               return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '')
-                       }
-               }
-       }
+           if (favorite) {
+             favs.splice(favs.indexOf(favorite), 1);
+           } else {
+             // only allow 10 favorites
+             if (favs.length === 10) {
+               // remove the last favorite (last in, first out)
+               favs.pop();
+             } // append array

 
 

-       function bind$3(obj, fn) {
-               return function() {
-                       return fn.apply(obj, Array.prototype.slice.call(arguments, 0))
-               }
-       }

 
 

-       function slice$5(arr, index) {
-               return Array.prototype.slice.call(arr, index || 0)
-       }
+             favs.push(RibbonItem(preset, 'favorite'));
+           }

 
 

-       function each(obj, fn) {
-               pluck(obj, function(val, key) {
-                       fn(val, key);
-                       return false
-               });
-       }
+           setFavorites(favs);
+         };

 
 

-       function map$5(obj, fn) {
-               var res = (isList(obj) ? [] : {});
-               pluck(obj, function(v, k) {
-                       res[k] = fn(v, k);
-                       return false
-               });
-               return res
-       }
+         _this.removeFavorite = function (preset) {
+           var item = _this.favoriteMatching(preset);

 
 

-       function pluck(obj, fn) {
-               if (isList(obj)) {
-                       for (var i=0; i<obj.length; i++) {
-                               if (fn(obj[i], i)) {
-                                       return obj[i]
-                               }
-                       }
-               } else {
-                       for (var key in obj) {
-                               if (obj.hasOwnProperty(key)) {
-                                       if (fn(obj[key], key)) {
-                                               return obj[key]
-                                       }
-                               }
-                       }
-               }
-       }
+           if (item) {
+             var items = _this.getFavorites();

 
 

-       function isList(val) {
-               return (val != null && typeof val != 'function' && typeof val.length == 'number')
-       }
+             items.splice(items.indexOf(item), 1);
+             setFavorites(items);
+           }
+         };

 
 

-       function isFunction$2(val) {
-               return val && {}.toString.call(val) === '[object Function]'
-       }
+         _this.getFavorites = function () {
+           if (!_favorites) {
+             // fetch from local storage
+             var rawFavorites = JSON.parse(corePreferences('preset_favorites'));

 
 

-       function isObject$2(val) {
-               return val && {}.toString.call(val) === '[object Object]'
-       }
+             if (!rawFavorites) {
+               rawFavorites = [];
+               corePreferences('preset_favorites', JSON.stringify(rawFavorites));
+             }

 
 

-       var slice$6 = util.slice;
-       var pluck$1 = util.pluck;
-       var each$1 = util.each;
-       var bind$4 = util.bind;
-       var create$9 = util.create;
-       var isList$1 = util.isList;
-       var isFunction$3 = util.isFunction;
-       var isObject$3 = util.isObject;
+             _favorites = rawFavorites.reduce(function (output, d) {
+               var item = ribbonItemForMinified(d, 'favorite');
+               if (item && item.preset.addable()) output.push(item);
+               return output;
+             }, []);
+           }

 
 

-       var storeEngine = {
-               createStore: createStore
-       };
+           return _favorites;
+         };

 
 

-       var storeAPI = {
-               version: '2.0.12',
-               enabled: false,
-               
-               // get returns the value of the given key. If that value
-               // is undefined, it returns optionalDefaultValue instead.
-               get: function(key, optionalDefaultValue) {
-                       var data = this.storage.read(this._namespacePrefix + key);
-                       return this._deserialize(data, optionalDefaultValue)
-               },
-
-               // set will store the given value at key and returns value.
-               // Calling set with value === undefined is equivalent to calling remove.
-               set: function(key, value) {
-                       if (value === undefined) {
-                               return this.remove(key)
-                       }
-                       this.storage.write(this._namespacePrefix + key, this._serialize(value));
-                       return value
-               },
-
-               // remove deletes the key and value stored at the given key.
-               remove: function(key) {
-                       this.storage.remove(this._namespacePrefix + key);
-               },
-
-               // each will call the given callback once for each key-value pair
-               // in this store.
-               each: function(callback) {
-                       var self = this;
-                       this.storage.each(function(val, namespacedKey) {
-                               callback.call(self, self._deserialize(val), (namespacedKey || '').replace(self._namespaceRegexp, ''));
-                       });
-               },
-
-               // clearAll will remove all the stored key-value pairs in this store.
-               clearAll: function() {
-                       this.storage.clearAll();
-               },
-
-               // additional functionality that can't live in plugins
-               // ---------------------------------------------------
-
-               // hasNamespace returns true if this store instance has the given namespace.
-               hasNamespace: function(namespace) {
-                       return (this._namespacePrefix == '__storejs_'+namespace+'_')
-               },
-
-               // createStore creates a store.js instance with the first
-               // functioning storage in the list of storage candidates,
-               // and applies the the given mixins to the instance.
-               createStore: function() {
-                       return createStore.apply(this, arguments)
-               },
-               
-               addPlugin: function(plugin) {
-                       this._addPlugin(plugin);
-               },
-               
-               namespace: function(namespace) {
-                       return createStore(this.storage, this.plugins, namespace)
-               }
-       };
+         _this.favoriteMatching = function (preset) {
+           var favs = _this.getFavorites();

 
 

-       function _warn() {
-               var _console = (typeof console == 'undefined' ? null : console);
-               if (!_console) { return }
-               var fn = (_console.warn ? _console.warn : _console.log);
-               fn.apply(_console, arguments);
-       }
-
-       function createStore(storages, plugins, namespace) {
-               if (!namespace) {
-                       namespace = '';
-               }
-               if (storages && !isList$1(storages)) {
-                       storages = [storages];
-               }
-               if (plugins && !isList$1(plugins)) {
-                       plugins = [plugins];
-               }
-
-               var namespacePrefix = (namespace ? '__storejs_'+namespace+'_' : '');
-               var namespaceRegexp = (namespace ? new RegExp('^'+namespacePrefix) : null);
-               var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
-               if (!legalNamespaces.test(namespace)) {
-                       throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes')
-               }
-               
-               var _privateStoreProps = {
-                       _namespacePrefix: namespacePrefix,
-                       _namespaceRegexp: namespaceRegexp,
-
-                       _testStorage: function(storage) {
-                               try {
-                                       var testStr = '__storejs__test__';
-                                       storage.write(testStr, testStr);
-                                       var ok = (storage.read(testStr) === testStr);
-                                       storage.remove(testStr);
-                                       return ok
-                               } catch(e) {
-                                       return false
-                               }
-                       },
-
-                       _assignPluginFnProp: function(pluginFnProp, propName) {
-                               var oldFn = this[propName];
-                               this[propName] = function pluginFn() {
-                                       var args = slice$6(arguments, 0);
-                                       var self = this;
-
-                                       // super_fn calls the old function which was overwritten by
-                                       // this mixin.
-                                       function super_fn() {
-                                               if (!oldFn) { return }
-                                               each$1(arguments, function(arg, i) {
-                                                       args[i] = arg;
-                                               });
-                                               return oldFn.apply(self, args)
-                                       }
-
-                                       // Give mixing function access to super_fn by prefixing all mixin function
-                                       // arguments with super_fn.
-                                       var newFnArgs = [super_fn].concat(args);
-
-                                       return pluginFnProp.apply(self, newFnArgs)
-                               };
-                       },
-
-                       _serialize: function(obj) {
-                               return JSON.stringify(obj)
-                       },
-
-                       _deserialize: function(strVal, defaultVal) {
-                               if (!strVal) { return defaultVal }
-                               // It is possible that a raw string value has been previously stored
-                               // in a storage without using store.js, meaning it will be a raw
-                               // string value instead of a JSON serialized string. By defaulting
-                               // to the raw string value in case of a JSON parse error, we allow
-                               // for past stored values to be forwards-compatible with store.js
-                               var val = '';
-                               try { val = JSON.parse(strVal); }
-                               catch(e) { val = strVal; }
-
-                               return (val !== undefined ? val : defaultVal)
-                       },
-                       
-                       _addStorage: function(storage) {
-                               if (this.enabled) { return }
-                               if (this._testStorage(storage)) {
-                                       this.storage = storage;
-                                       this.enabled = true;
-                               }
-                       },
-
-                       _addPlugin: function(plugin) {
-                               var self = this;
-
-                               // If the plugin is an array, then add all plugins in the array.
-                               // This allows for a plugin to depend on other plugins.
-                               if (isList$1(plugin)) {
-                                       each$1(plugin, function(plugin) {
-                                               self._addPlugin(plugin);
-                                       });
-                                       return
-                               }
-
-                               // Keep track of all plugins we've seen so far, so that we
-                               // don't add any of them twice.
-                               var seenPlugin = pluck$1(this.plugins, function(seenPlugin) {
-                                       return (plugin === seenPlugin)
-                               });
-                               if (seenPlugin) {
-                                       return
-                               }
-                               this.plugins.push(plugin);
-
-                               // Check that the plugin is properly formed
-                               if (!isFunction$3(plugin)) {
-                                       throw new Error('Plugins must be function values that return objects')
-                               }
-
-                               var pluginProperties = plugin.call(this);
-                               if (!isObject$3(pluginProperties)) {
-                                       throw new Error('Plugins must return an object of function properties')
-                               }
-
-                               // Add the plugin function properties to this store instance.
-                               each$1(pluginProperties, function(pluginFnProp, propName) {
-                                       if (!isFunction$3(pluginFnProp)) {
-                                               throw new Error('Bad plugin property: '+propName+' from plugin '+plugin.name+'. Plugins should only return functions.')
-                                       }
-                                       self._assignPluginFnProp(pluginFnProp, propName);
-                               });
-                       },
-                       
-                       // Put deprecated properties in the private API, so as to not expose it to accidential
-                       // discovery through inspection of the store object.
-                       
-                       // Deprecated: addStorage
-                       addStorage: function(storage) {
-                               _warn('store.addStorage(storage) is deprecated. Use createStore([storages])');
-                               this._addStorage(storage);
-                       }
-               };
-
-               var store = create$9(_privateStoreProps, storeAPI, {
-                       plugins: []
-               });
-               store.raw = {};
-               each$1(store, function(prop, propName) {
-                       if (isFunction$3(prop)) {
-                               store.raw[propName] = bind$4(store, prop);                      
-                       }
-               });
-               each$1(storages, function(storage) {
-                       store._addStorage(storage);
-               });
-               each$1(plugins, function(plugin) {
-                       store._addPlugin(plugin);
-               });
-               return store
-       }
-
-       var Global$1 = util.Global;
+           for (var index in favs) {
+             if (favs[index].matches(preset)) {
+               return favs[index];
+             }
+           }

 
 

-       var localStorage_1 = {
-               name: 'localStorage',
-               read: read,
-               write: write,
-               each: each$2,
-               remove: remove$2,
-               clearAll: clearAll,
-       };
+           return null;
+         };

 
 

-       function localStorage$1() {
-               return Global$1.localStorage
+         return utilRebind(_this, dispatch, 'on');

        }
 
        }
 

-       function read(key) {
-               return localStorage$1().getItem(key)
+       function utilTagText(entity) {
+         var obj = entity && entity.tags || {};
+         return Object.keys(obj).map(function (k) {
+           return k + '=' + obj[k];
+         }).join(', ');

        }
        }

+       function utilTotalExtent(array, graph) {
+         var extent = geoExtent();
+         var val, entity;

 
 

-       function write(key, data) {
-               return localStorage$1().setItem(key, data)
-       }
+         for (var i = 0; i < array.length; i++) {
+           val = array[i];
+           entity = typeof val === 'string' ? graph.hasEntity(val) : val;

 
 

-       function each$2(fn) {
-               for (var i = localStorage$1().length - 1; i >= 0; i--) {
-                       var key = localStorage$1().key(i);
-                       fn(read(key), key);
-               }
-       }
+           if (entity) {
+             extent._extend(entity.extent(graph));
+           }
+         }

 
 

-       function remove$2(key) {
-               return localStorage$1().removeItem(key)
+         return extent;

        }
        }

+       function utilTagDiff(oldTags, newTags) {
+         var tagDiff = [];
+         var keys = utilArrayUnion(Object.keys(oldTags), Object.keys(newTags)).sort();
+         keys.forEach(function (k) {
+           var oldVal = oldTags[k];
+           var newVal = newTags[k];
+
+           if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
+             tagDiff.push({
+               type: '-',
+               key: k,
+               oldVal: oldVal,
+               newVal: newVal,
+               display: '- ' + k + '=' + oldVal
+             });
+           }

 
 

-       function clearAll() {
-               return localStorage$1().clear()
+           if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
+             tagDiff.push({
+               type: '+',
+               key: k,
+               oldVal: oldVal,
+               newVal: newVal,
+               display: '+ ' + k + '=' + newVal
+             });
+           }
+         });
+         return tagDiff;

        }
        }

+       function utilEntitySelector(ids) {
+         return ids.length ? '.' + ids.join(',.') : 'nothing';
+       } // returns an selector to select entity ids for:
+       //  - entityIDs passed in
+       //  - shallow descendant entityIDs for any of those entities that are relations

 
 

-       // oldFF-globalStorage provides storage for Firefox
-       // versions 6 and 7, where no localStorage, etc
-       // is available.
+       function utilEntityOrMemberSelector(ids, graph) {
+         var seen = new Set(ids);
+         ids.forEach(collectShallowDescendants);
+         return utilEntitySelector(Array.from(seen));
+
+         function collectShallowDescendants(id) {
+           var entity = graph.hasEntity(id);
+           if (!entity || entity.type !== 'relation') return;
+           entity.members.map(function (member) {
+             return member.id;
+           }).forEach(function (id) {
+             seen.add(id);
+           });
+         }
+       } // returns an selector to select entity ids for:
+       //  - entityIDs passed in
+       //  - deep descendant entityIDs for any of those entities that are relations

 
 

+       function utilEntityOrDeepMemberSelector(ids, graph) {
+         return utilEntitySelector(utilEntityAndDeepMemberIDs(ids, graph));
+       } // returns an selector to select entity ids for:
+       //  - entityIDs passed in
+       //  - deep descendant entityIDs for any of those entities that are relations

 
 

-       var Global$2 = util.Global;
+       function utilEntityAndDeepMemberIDs(ids, graph) {
+         var seen = new Set();
+         ids.forEach(collectDeepDescendants);
+         return Array.from(seen);
+
+         function collectDeepDescendants(id) {
+           if (seen.has(id)) return;
+           seen.add(id);
+           var entity = graph.hasEntity(id);
+           if (!entity || entity.type !== 'relation') return;
+           entity.members.map(function (member) {
+             return member.id;
+           }).forEach(collectDeepDescendants); // recurse
+         }
+       } // returns an selector to select entity ids for:
+       //  - deep descendant entityIDs for any of those entities that are relations

 
 

-       var oldFFGlobalStorage = {
-               name: 'oldFF-globalStorage',
-               read: read$1,
-               write: write$1,
-               each: each$3,
-               remove: remove$3,
-               clearAll: clearAll$1,
-       };
+       function utilDeepMemberSelector(ids, graph, skipMultipolgonMembers) {
+         var idsSet = new Set(ids);
+         var seen = new Set();
+         var returners = new Set();
+         ids.forEach(collectDeepDescendants);
+         return utilEntitySelector(Array.from(returners));

 
 

-       var globalStorage = Global$2.globalStorage;
+         function collectDeepDescendants(id) {
+           if (seen.has(id)) return;
+           seen.add(id);

 
 

-       function read$1(key) {
-               return globalStorage[key]
-       }
+           if (!idsSet.has(id)) {
+             returners.add(id);
+           }

 
 

-       function write$1(key, data) {
-               globalStorage[key] = data;
-       }
+           var entity = graph.hasEntity(id);
+           if (!entity || entity.type !== 'relation') return;
+           if (skipMultipolgonMembers && entity.isMultipolygon()) return;
+           entity.members.map(function (member) {
+             return member.id;
+           }).forEach(collectDeepDescendants); // recurse
+         }
+       } // Adds or removes highlight styling for the specified entities

 
 

-       function each$3(fn) {
-               for (var i = globalStorage.length - 1; i >= 0; i--) {
-                       var key = globalStorage.key(i);
-                       fn(globalStorage[key], key);
-               }
-       }
+       function utilHighlightEntities(ids, highlighted, context) {
+         context.surface().selectAll(utilEntityOrDeepMemberSelector(ids, context.graph())).classed('highlighted', highlighted);
+       } // returns an Array that is the union of:
+       //  - nodes for any nodeIDs passed in
+       //  - child nodes of any wayIDs passed in
+       //  - descendant member and child nodes of relationIDs passed in

 
 

-       function remove$3(key) {
-               return globalStorage.removeItem(key)
+       function utilGetAllNodes(ids, graph) {
+         var seen = new Set();
+         var nodes = new Set();
+         ids.forEach(collectNodes);
+         return Array.from(nodes);
+
+         function collectNodes(id) {
+           if (seen.has(id)) return;
+           seen.add(id);
+           var entity = graph.hasEntity(id);
+           if (!entity) return;
+
+           if (entity.type === 'node') {
+             nodes.add(entity);
+           } else if (entity.type === 'way') {
+             entity.nodes.forEach(collectNodes);
+           } else {
+             entity.members.map(function (member) {
+               return member.id;
+             }).forEach(collectNodes); // recurse
+           }
+         }

        }
        }

+       function utilDisplayName(entity) {
+         var localizedNameKey = 'name:' + _mainLocalizer.languageCode().toLowerCase();
+         var name = entity.tags[localizedNameKey] || entity.tags.name || '';
+         if (name) return name;
+         var tags = {
+           direction: entity.tags.direction,
+           from: entity.tags.from,
+           network: entity.tags.cycle_network || entity.tags.network,
+           ref: entity.tags.ref,
+           to: entity.tags.to,
+           via: entity.tags.via
+         };
+         var keyComponents = [];

 
 

-       function clearAll$1() {
-               each$3(function(key, _) {
-                       delete globalStorage[key];
-               });
-       }
+         if (tags.network) {
+           keyComponents.push('network');
+         }

 
 

-       // oldIE-userDataStorage provides storage for Internet Explorer
-       // versions 6 and 7, where no localStorage, sessionStorage, etc
-       // is available.
+         if (tags.ref) {
+           keyComponents.push('ref');
+         } // Routes may need more disambiguation based on direction or destination

 
 
 
 

-       var Global$3 = util.Global;
+         if (entity.tags.route) {
+           if (tags.direction) {
+             keyComponents.push('direction');
+           } else if (tags.from && tags.to) {
+             keyComponents.push('from');
+             keyComponents.push('to');

 
 

-       var oldIEUserDataStorage = {
-               name: 'oldIE-userDataStorage',
-               write: write$2,
-               read: read$2,
-               each: each$4,
-               remove: remove$4,
-               clearAll: clearAll$2,
-       };
+             if (tags.via) {
+               keyComponents.push('via');
+             }
+           }
+         }

 
 

-       var storageName = 'storejs';
-       var doc = Global$3.document;
-       var _withStorageEl = _makeIEStorageElFunction();
-       var disable = (Global$3.navigator ? Global$3.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
+         if (keyComponents.length) {
+           name = _t('inspector.display_name.' + keyComponents.join('_'), tags);
+         }

 
 

-       function write$2(unfixedKey, data) {
-               if (disable) { return }
-               var fixedKey = fixKey(unfixedKey);
-               _withStorageEl(function(storageEl) {
-                       storageEl.setAttribute(fixedKey, data);
-                       storageEl.save(storageName);
-               });
+         return name;

        }
        }

+       function utilDisplayNameForPath(entity) {
+         var name = utilDisplayName(entity);
+         var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
+         var isNewChromium = Number(utilDetect().version.split('.')[0]) >= 96.0;

 
 

-       function read$2(unfixedKey) {
-               if (disable) { return }
-               var fixedKey = fixKey(unfixedKey);
-               var res = null;
-               _withStorageEl(function(storageEl) {
-                       res = storageEl.getAttribute(fixedKey);
-               });
-               return res
-       }
+         if (!isFirefox && !isNewChromium && name && rtlRegex.test(name)) {
+           name = fixRTLTextForSvg(name);
+         }

 
 

-       function each$4(callback) {
-               _withStorageEl(function(storageEl) {
-                       var attributes = storageEl.XMLDocument.documentElement.attributes;
-                       for (var i=attributes.length-1; i>=0; i--) {
-                               var attr = attributes[i];
-                               callback(storageEl.getAttribute(attr.name), attr.name);
-                       }
-               });
+         return name;

        }
        }

+       function utilDisplayType(id) {
+         return {
+           n: _t('inspector.node'),
+           w: _t('inspector.way'),
+           r: _t('inspector.relation')
+         }[id.charAt(0)];
+       } // `utilDisplayLabel`
+       // Returns a string suitable for display
+       // By default returns something like name/ref, fallback to preset type, fallback to OSM type
+       //   "Main Street" or "Tertiary Road"
+       // If `verbose=true`, include both preset name and feature name.
+       //   "Tertiary Road Main Street"
+       //

 
 

-       function remove$4(unfixedKey) {
-               var fixedKey = fixKey(unfixedKey);
-               _withStorageEl(function(storageEl) {
-                       storageEl.removeAttribute(fixedKey);
-                       storageEl.save(storageName);
-               });
-       }
+       function utilDisplayLabel(entity, graphOrGeometry, verbose) {
+         var result;
+         var displayName = utilDisplayName(entity);
+         var preset = typeof graphOrGeometry === 'string' ? _mainPresetIndex.matchTags(entity.tags, graphOrGeometry) : _mainPresetIndex.match(entity, graphOrGeometry);
+         var presetName = preset && (preset.suggestion ? preset.subtitle() : preset.name());

 
 

-       function clearAll$2() {
-               _withStorageEl(function(storageEl) {
-                       var attributes = storageEl.XMLDocument.documentElement.attributes;
-                       storageEl.load(storageName);
-                       for (var i=attributes.length-1; i>=0; i--) {
-                               storageEl.removeAttribute(attributes[i].name);
-                       }
-                       storageEl.save(storageName);
-               });
-       }
+         if (verbose) {
+           result = [presetName, displayName].filter(Boolean).join(' ');
+         } else {
+           result = displayName || presetName;
+         } // Fallback to the OSM type (node/way/relation)

 
 

-       // Helpers
-       //////////

 
 

-       // In IE7, keys cannot start with a digit or contain certain chars.
-       // See https://github.com/marcuswestin/store.js/issues/40
-       // See https://github.com/marcuswestin/store.js/issues/83
-       var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
-       function fixKey(key) {
-               return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___')
+         return result || utilDisplayType(entity.id);

        }
        }

+       function utilEntityRoot(entityType) {
+         return {
+           node: 'n',
+           way: 'w',
+           relation: 'r'
+         }[entityType];
+       } // Returns a single object containing the tags of all the given entities.
+       // Example:
+       // {
+       //   highway: 'service',
+       //   service: 'parking_aisle'
+       // }
+       //           +
+       // {
+       //   highway: 'service',
+       //   service: 'driveway',
+       //   width: '3'
+       // }
+       //           =
+       // {
+       //   highway: 'service',
+       //   service: [ 'driveway', 'parking_aisle' ],
+       //   width: [ '3', undefined ]
+       // }

 
 

-       function _makeIEStorageElFunction() {
-               if (!doc || !doc.documentElement || !doc.documentElement.addBehavior) {
-                       return null
-               }
-               var scriptTag = 'script',
-                       storageOwner,
-                       storageContainer,
-                       storageEl;
-
-               // Since #userData storage applies only to specific paths, we need to
-               // somehow link our data to a specific path.  We choose /favicon.ico
-               // as a pretty safe option, since all browsers already make a request to
-               // this URL anyway and being a 404 will not hurt us here.  We wrap an
-               // iframe pointing to the favicon in an ActiveXObject(htmlfile) object
-               // (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
-               // since the iframe access rules appear to allow direct access and
-               // manipulation of the document element, even for a 404 page.  This
-               // document can be used instead of the current document (which would
-               // have been limited to the current path) to perform #userData storage.
-               try {
-                       /* global ActiveXObject */
-                       storageContainer = new ActiveXObject('htmlfile');
-                       storageContainer.open();
-                       storageContainer.write('<'+scriptTag+'>document.w=window</'+scriptTag+'><iframe src="/favicon.ico"></iframe>');
-                       storageContainer.close();
-                       storageOwner = storageContainer.w.frames[0].document;
-                       storageEl = storageOwner.createElement('div');
-               } catch(e) {
-                       // somehow ActiveXObject instantiation failed (perhaps some special
-                       // security settings or otherwse), fall back to per-path storage
-                       storageEl = doc.createElement('div');
-                       storageOwner = doc.body;
-               }
-
-               return function(storeFunction) {
-                       var args = [].slice.call(arguments, 0);
-                       args.unshift(storageEl);
-                       // See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
-                       // and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
-                       storageOwner.appendChild(storageEl);
-                       storageEl.addBehavior('#default#userData');
-                       storageEl.load(storageName);
-                       storeFunction.apply(this, args);
-                       storageOwner.removeChild(storageEl);
-                       return
-               }
-       }
-
-       // cookieStorage is useful Safari private browser mode, where localStorage
-       // doesn't work but cookies do. This implementation is adopted from
-       // https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
+       function utilCombinedTags(entityIDs, graph) {
+         var tags = {};
+         var tagCounts = {};
+         var allKeys = new Set();
+         var entities = entityIDs.map(function (entityID) {
+           return graph.hasEntity(entityID);
+         }).filter(Boolean); // gather the aggregate keys
+
+         entities.forEach(function (entity) {
+           var keys = Object.keys(entity.tags).filter(Boolean);
+           keys.forEach(function (key) {
+             allKeys.add(key);
+           });
+         });
+         entities.forEach(function (entity) {
+           allKeys.forEach(function (key) {
+             var value = entity.tags[key]; // purposely allow `undefined`

 
 

+             if (!tags.hasOwnProperty(key)) {
+               // first value, set as raw
+               tags[key] = value;
+             } else {
+               if (!Array.isArray(tags[key])) {
+                 if (tags[key] !== value) {
+                   // first alternate value, replace single value with array
+                   tags[key] = [tags[key], value];
+                 }
+               } else {
+                 // type is array
+                 if (tags[key].indexOf(value) === -1) {
+                   // subsequent alternate value, add to array
+                   tags[key].push(value);
+                 }
+               }
+             }

 
 

-       var Global$4 = util.Global;
-       var trim$1 = util.trim;
+             var tagHash = key + '=' + value;
+             if (!tagCounts[tagHash]) tagCounts[tagHash] = 0;
+             tagCounts[tagHash] += 1;
+           });
+         });

 
 

-       var cookieStorage = {
-               name: 'cookieStorage',
-               read: read$3,
-               write: write$3,
-               each: each$5,
-               remove: remove$5,
-               clearAll: clearAll$3,
-       };
+         for (var key in tags) {
+           if (!Array.isArray(tags[key])) continue; // sort values by frequency then alphabetically

 
 

-       var doc$1 = Global$4.document;
+           tags[key] = tags[key].sort(function (val1, val2) {
+             var key = key; // capture

 
 

-       function read$3(key) {
-               if (!key || !_has(key)) { return null }
-               var regexpStr = "(?:^|.*;\\s*)" +
-                       escape(key).replace(/[\-\.\+\*]/g, "\\$&") +
-                       "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
-               return unescape(doc$1.cookie.replace(new RegExp(regexpStr), "$1"))
-       }
+             var count2 = tagCounts[key + '=' + val2];
+             var count1 = tagCounts[key + '=' + val1];

 
 

-       function each$5(callback) {
-               var cookies = doc$1.cookie.split(/; ?/g);
-               for (var i = cookies.length - 1; i >= 0; i--) {
-                       if (!trim$1(cookies[i])) {
-                               continue
-                       }
-                       var kvp = cookies[i].split('=');
-                       var key = unescape(kvp[0]);
-                       var val = unescape(kvp[1]);
-                       callback(val, key);
-               }
-       }
+             if (count2 !== count1) {
+               return count2 - count1;
+             }

 
 

-       function write$3(key, data) {
-               if(!key) { return }
-               doc$1.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
-       }
+             if (val2 && val1) {
+               return val1.localeCompare(val2);
+             }

 
 

-       function remove$5(key) {
-               if (!key || !_has(key)) {
-                       return
-               }
-               doc$1.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
-       }
+             return val1 ? 1 : -1;
+           });
+         }

 
 

-       function clearAll$3() {
-               each$5(function(_, key) {
-                       remove$5(key);
-               });
+         return tags;

        }
        }

+       function utilStringQs(str) {
+         var i = 0; // advance past any leading '?' or '#' characters

 
 

-       function _has(key) {
-               return (new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=")).test(doc$1.cookie)
-       }
+         while (i < str.length && (str[i] === '?' || str[i] === '#')) {
+           i++;
+         }

 
 

-       var Global$5 = util.Global;
+         str = str.slice(i);
+         return str.split('&').reduce(function (obj, pair) {
+           var parts = pair.split('=');

 
 

-       var sessionStorage_1 = {
-               name: 'sessionStorage',
-               read: read$4,
-               write: write$4,
-               each: each$6,
-               remove: remove$6,
-               clearAll: clearAll$4
-       };
+           if (parts.length === 2) {
+             obj[parts[0]] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
+           }

 
 

-       function sessionStorage() {
-               return Global$5.sessionStorage
+           return obj;
+         }, {});

        }
        }

+       function utilQsString(obj, noencode) {
+         // encode everything except special characters used in certain hash parameters:
+         // "/" in map states, ":", ",", {" and "}" in background
+         function softEncode(s) {
+           return encodeURIComponent(s).replace(/(%2F|%3A|%2C|%7B|%7D)/g, decodeURIComponent);
+         }

 
 

-       function read$4(key) {
-               return sessionStorage().getItem(key)
+         return Object.keys(obj).sort().map(function (key) {
+           return encodeURIComponent(key) + '=' + (noencode ? softEncode(obj[key]) : encodeURIComponent(obj[key]));
+         }).join('&');

        }
        }

+       function utilPrefixDOMProperty(property) {
+         var prefixes = ['webkit', 'ms', 'moz', 'o'];
+         var i = -1;
+         var n = prefixes.length;
+         var s = document.body;
+         if (property in s) return property;
+         property = property.substr(0, 1).toUpperCase() + property.substr(1);

 
 

-       function write$4(key, data) {
-               return sessionStorage().setItem(key, data)
-       }
+         while (++i < n) {
+           if (prefixes[i] + property in s) {
+             return prefixes[i] + property;
+           }
+         }

 
 

-       function each$6(fn) {
-               for (var i = sessionStorage().length - 1; i >= 0; i--) {
-                       var key = sessionStorage().key(i);
-                       fn(read$4(key), key);
-               }
+         return false;

        }
        }

+       function utilPrefixCSSProperty(property) {
+         var prefixes = ['webkit', 'ms', 'Moz', 'O'];
+         var i = -1;
+         var n = prefixes.length;
+         var s = document.body.style;

 
 

-       function remove$6(key) {
-               return sessionStorage().removeItem(key)
-       }
+         if (property.toLowerCase() in s) {
+           return property.toLowerCase();
+         }

 
 

-       function clearAll$4() {
-               return sessionStorage().clear()
+         while (++i < n) {
+           if (prefixes[i] + property in s) {
+             return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
+           }
+         }
+
+         return false;

        }
        }

+       var transformProperty;
+       function utilSetTransform(el, x, y, scale) {
+         var prop = transformProperty = transformProperty || utilPrefixCSSProperty('Transform');
+         var translate = utilDetect().opera ? 'translate(' + x + 'px,' + y + 'px)' : 'translate3d(' + x + 'px,' + y + 'px,0)';
+         return el.style(prop, translate + (scale ? ' scale(' + scale + ')' : ''));
+       } // Calculates Levenshtein distance between two strings
+       // see:  https://en.wikipedia.org/wiki/Levenshtein_distance
+       // first converts the strings to lowercase and replaces diacritic marks with ascii equivalents.

 
 

-       // memoryStorage is a useful last fallback to ensure that the store
-       // is functions (meaning store.get(), store.set(), etc will all function).
-       // However, stored values will not persist when the browser navigates to
-       // a new page or reloads the current page.
+       function utilEditDistance(a, b) {
+         a = remove$6(a.toLowerCase());
+         b = remove$6(b.toLowerCase());
+         if (a.length === 0) return b.length;
+         if (b.length === 0) return a.length;
+         var matrix = [];
+         var i, j;

 
 

-       var memoryStorage_1 = {
-               name: 'memoryStorage',
-               read: read$5,
-               write: write$5,
-               each: each$7,
-               remove: remove$7,
-               clearAll: clearAll$5,
-       };
+         for (i = 0; i <= b.length; i++) {
+           matrix[i] = [i];
+         }

 
 

-       var memoryStorage = {};
+         for (j = 0; j <= a.length; j++) {
+           matrix[0][j] = j;
+         }

 
 

-       function read$5(key) {
-               return memoryStorage[key]
-       }
+         for (i = 1; i <= b.length; i++) {
+           for (j = 1; j <= a.length; j++) {
+             if (b.charAt(i - 1) === a.charAt(j - 1)) {
+               matrix[i][j] = matrix[i - 1][j - 1];
+             } else {
+               matrix[i][j] = Math.min(matrix[i - 1][j - 1] + 1, // substitution
+               Math.min(matrix[i][j - 1] + 1, // insertion
+               matrix[i - 1][j] + 1)); // deletion
+             }
+           }
+         }

 
 

-       function write$5(key, data) {
-               memoryStorage[key] = data;
-       }
+         return matrix[b.length][a.length];
+       } // a d3.mouse-alike which
+       // 1. Only works on HTML elements, not SVG
+       // 2. Does not cause style recalculation

 
 

-       function each$7(callback) {
-               for (var key in memoryStorage) {
-                       if (memoryStorage.hasOwnProperty(key)) {
-                               callback(memoryStorage[key], key);
-                       }
-               }
+       function utilFastMouse(container) {
+         var rect = container.getBoundingClientRect();
+         var rectLeft = rect.left;
+         var rectTop = rect.top;
+         var clientLeft = +container.clientLeft;
+         var clientTop = +container.clientTop;
+         return function (e) {
+           return [e.clientX - rectLeft - clientLeft, e.clientY - rectTop - clientTop];
+         };

        }
        }

+       function utilAsyncMap(inputs, func, callback) {
+         var remaining = inputs.length;
+         var results = [];
+         var errors = [];
+         inputs.forEach(function (d, i) {
+           func(d, function done(err, data) {
+             errors[i] = err;
+             results[i] = data;
+             remaining--;
+             if (!remaining) callback(errors, results);
+           });
+         });
+       } // wraps an index to an interval [0..length-1]
+
+       function utilWrap(index, length) {
+         if (index < 0) {
+           index += Math.ceil(-index / length) * length;
+         }

 
 

-       function remove$7(key) {
-               delete memoryStorage[key];
+         return index % length;

        }
        }

+       /**
+        * a replacement for functor
+        *
+        * @param {*} value any value
+        * @returns {Function} a function that returns that value or the value if it's a function
+        */

 
 

-       function clearAll$5(key) {
-               memoryStorage = {};
+       function utilFunctor(value) {
+         if (typeof value === 'function') return value;
+         return function () {
+           return value;
+         };

        }
        }

+       function utilNoAuto(selection) {
+         var isText = selection.size() && selection.node().tagName.toLowerCase() === 'textarea';
+         return selection // assign 'new-password' even for non-password fields to prevent browsers (Chrome) ignoring 'off'
+         .attr('autocomplete', 'new-password').attr('autocorrect', 'off').attr('autocapitalize', 'off').attr('spellcheck', isText ? 'true' : 'false');
+       } // https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript
+       // https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/

 
 

-       var all = [
-               // Listed in order of usage preference
-               localStorage_1,
-               oldFFGlobalStorage,
-               oldIEUserDataStorage,
-               cookieStorage,
-               sessionStorage_1,
-               memoryStorage_1
-       ];
+       function utilHashcode(str) {
+         var hash = 0;

 
 

-       /* eslint-disable */
+         if (str.length === 0) {
+           return hash;
+         }

 
 

-       //  json2.js
-       //  2016-10-28
-       //  Public Domain.
-       //  NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
-       //  See http://www.JSON.org/js.html
-       //  This code should be minified before deployment.
-       //  See http://javascript.crockford.com/jsmin.html
+         for (var i = 0; i < str.length; i++) {
+           var _char = str.charCodeAt(i);

 
 

-       //  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
-       //  NOT CONTROL.
+           hash = (hash << 5) - hash + _char;
+           hash = hash & hash; // Convert to 32bit integer
+         }

 
 

-       //  This file creates a global JSON object containing two methods: stringify
-       //  and parse. This file provides the ES5 JSON capability to ES3 systems.
-       //  If a project might run on IE8 or earlier, then this file should be included.
-       //  This file does nothing on ES5 systems.
+         return hash;
+       } // Returns version of `str` with all runs of special characters replaced by `_`;
+       // suitable for HTML ids, classes, selectors, etc.

 
 

-       //      JSON.stringify(value, replacer, space)
-       //          value       any JavaScript value, usually an object or array.
-       //          replacer    an optional parameter that determines how object
-       //                      values are stringified for objects. It can be a
-       //                      function or an array of strings.
-       //          space       an optional parameter that specifies the indentation
-       //                      of nested structures. If it is omitted, the text will
-       //                      be packed without extra whitespace. If it is a number,
-       //                      it will specify the number of spaces to indent at each
-       //                      level. If it is a string (such as "\t" or "&nbsp;"),
-       //                      it contains the characters used to indent at each level.
-       //          This method produces a JSON text from a JavaScript value.
-       //          When an object value is found, if the object contains a toJSON
-       //          method, its toJSON method will be called and the result will be
-       //          stringified. A toJSON method does not serialize: it returns the
-       //          value represented by the name/value pair that should be serialized,
-       //          or undefined if nothing should be serialized. The toJSON method
-       //          will be passed the key associated with the value, and this will be
-       //          bound to the value.
+       function utilSafeClassName(str) {
+         return str.toLowerCase().replace(/[^a-z0-9]+/g, '_');
+       } // Returns string based on `val` that is highly unlikely to collide with an id
+       // used previously or that's present elsewhere in the document. Useful for preventing
+       // browser-provided autofills or when embedding iD on pages with unknown elements.

 
 

-       //          For example, this would serialize Dates as ISO strings.
+       function utilUniqueDomId(val) {
+         return 'ideditor-' + utilSafeClassName(val.toString()) + '-' + new Date().getTime().toString();
+       } // Returns the length of `str` in unicode characters. This can be less than
+       // `String.length()` since a single unicode character can be composed of multiple
+       // JavaScript UTF-16 code units.
+
+       function utilUnicodeCharsCount(str) {
+         // Native ES2015 implementations of `Array.from` split strings into unicode characters
+         return Array.from(str).length;
+       } // Returns a new string representing `str` cut from its start to `limit` length
+       // in unicode characters. Note that this runs the risk of splitting graphemes.
+
+       function utilUnicodeCharsTruncated(str, limit) {
+         return Array.from(str).slice(0, limit).join('');
+       }
+
+       function osmEntity(attrs) {
+         // For prototypal inheritance.
+         if (this instanceof osmEntity) return; // Create the appropriate subtype.
+
+         if (attrs && attrs.type) {
+           return osmEntity[attrs.type].apply(this, arguments);
+         } else if (attrs && attrs.id) {
+           return osmEntity[osmEntity.id.type(attrs.id)].apply(this, arguments);
+         } // Initialize a generic Entity (used only in tests).

 
 

-       //              Date.prototype.toJSON = function (key) {
-       //                  function f(n) {
-       //                      // Format integers to have at least two digits.
-       //                      return (n < 10)
-       //                          ? "0" + n
-       //                          : n;
-       //                  }
-       //                  return this.getUTCFullYear()   + "-" +
-       //                       f(this.getUTCMonth() + 1) + "-" +
-       //                       f(this.getUTCDate())      + "T" +
-       //                       f(this.getUTCHours())     + ":" +
-       //                       f(this.getUTCMinutes())   + ":" +
-       //                       f(this.getUTCSeconds())   + "Z";
-       //              };

 
 

-       //          You can provide an optional replacer method. It will be passed the
-       //          key and value of each member, with this bound to the containing
-       //          object. The value that is returned from your method will be
-       //          serialized. If your method returns undefined, then the member will
-       //          be excluded from the serialization.
+         return new osmEntity().initialize(arguments);
+       }

 
 

-       //          If the replacer parameter is an array of strings, then it will be
-       //          used to select the members to be serialized. It filters the results
-       //          such that only members with keys listed in the replacer array are
-       //          stringified.
+       osmEntity.id = function (type) {
+         return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
+       };

 
 

-       //          Values that do not have JSON representations, such as undefined or
-       //          functions, will not be serialized. Such values in objects will be
-       //          dropped; in arrays they will be replaced with null. You can use
-       //          a replacer function to replace those with JSON values.
+       osmEntity.id.next = {
+         changeset: -1,
+         node: -1,
+         way: -1,
+         relation: -1
+       };

 
 

-       //          JSON.stringify(undefined) returns undefined.
+       osmEntity.id.fromOSM = function (type, id) {
+         return type[0] + id;
+       };

 
 

-       //          The optional space parameter produces a stringification of the
-       //          value that is filled with line breaks and indentation to make it
-       //          easier to read.
+       osmEntity.id.toOSM = function (id) {
+         return id.slice(1);
+       };

 
 

-       //          If the space parameter is a non-empty string, then that string will
-       //          be used for indentation. If the space parameter is a number, then
-       //          the indentation will be that many spaces.
+       osmEntity.id.type = function (id) {
+         return {
+           'c': 'changeset',
+           'n': 'node',
+           'w': 'way',
+           'r': 'relation'
+         }[id[0]];
+       }; // A function suitable for use as the second argument to d3.selection#data().

 
 

-       //          Example:

 
 

-       //          text = JSON.stringify(["e", {pluribus: "unum"}]);
-       //          // text is '["e",{"pluribus":"unum"}]'
+       osmEntity.key = function (entity) {
+         return entity.id + 'v' + (entity.v || 0);
+       };

 
 

-       //          text = JSON.stringify(["e", {pluribus: "unum"}], null, "\t");
-       //          // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+       var _deprecatedTagValuesByKey;

 
 

-       //          text = JSON.stringify([new Date()], function (key, value) {
-       //              return this[key] instanceof Date
-       //                  ? "Date(" + this[key] + ")"
-       //                  : value;
-       //          });
-       //          // text is '["Date(---current time---)"]'
+       osmEntity.deprecatedTagValuesByKey = function (dataDeprecated) {
+         if (!_deprecatedTagValuesByKey) {
+           _deprecatedTagValuesByKey = {};
+           dataDeprecated.forEach(function (d) {
+             var oldKeys = Object.keys(d.old);

 
 

-       //      JSON.parse(text, reviver)
-       //          This method parses a JSON text to produce an object or array.
-       //          It can throw a SyntaxError exception.
+             if (oldKeys.length === 1) {
+               var oldKey = oldKeys[0];
+               var oldValue = d.old[oldKey];

 
 

-       //          The optional reviver parameter is a function that can filter and
-       //          transform the results. It receives each of the keys and values,
-       //          and its return value is used instead of the original value.
-       //          If it returns what it received, then the structure is not modified.
-       //          If it returns undefined then the member is deleted.
+               if (oldValue !== '*') {
+                 if (!_deprecatedTagValuesByKey[oldKey]) {
+                   _deprecatedTagValuesByKey[oldKey] = [oldValue];
+                 } else {
+                   _deprecatedTagValuesByKey[oldKey].push(oldValue);
+                 }
+               }
+             }
+           });
+         }

 
 

-       //          Example:
+         return _deprecatedTagValuesByKey;
+       };

 
 

-       //          // Parse the text. Values that look like ISO date strings will
-       //          // be converted to Date objects.
+       osmEntity.prototype = {
+         tags: {},
+         initialize: function initialize(sources) {
+           for (var i = 0; i < sources.length; ++i) {
+             var source = sources[i];
+
+             for (var prop in source) {
+               if (Object.prototype.hasOwnProperty.call(source, prop)) {
+                 if (source[prop] === undefined) {
+                   delete this[prop];
+                 } else {
+                   this[prop] = source[prop];
+                 }
+               }
+             }
+           }

 
 

-       //          myData = JSON.parse(text, function (key, value) {
-       //              var a;
-       //              if (typeof value === "string") {
-       //                  a =
-       //   /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
-       //                  if (a) {
-       //                      return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
-       //                          +a[5], +a[6]));
-       //                  }
-       //              }
-       //              return value;
-       //          });
+           if (!this.id && this.type) {
+             this.id = osmEntity.id(this.type);
+           }

 
 

-       //          myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
-       //              var d;
-       //              if (typeof value === "string" &&
-       //                      value.slice(0, 5) === "Date(" &&
-       //                      value.slice(-1) === ")") {
-       //                  d = new Date(value.slice(5, -1));
-       //                  if (d) {
-       //                      return d;
-       //                  }
-       //              }
-       //              return value;
-       //          });
+           if (!this.hasOwnProperty('visible')) {
+             this.visible = true;
+           }

 
 

-       //  This is a reference implementation. You are free to copy, modify, or
-       //  redistribute.
+           if (debug) {
+             Object.freeze(this);
+             Object.freeze(this.tags);
+             if (this.loc) Object.freeze(this.loc);
+             if (this.nodes) Object.freeze(this.nodes);
+             if (this.members) Object.freeze(this.members);
+           }

 
 

-       /*jslint
-           eval, for, this
-       */
+           return this;
+         },
+         copy: function copy(resolver, copies) {
+           if (copies[this.id]) return copies[this.id];
+           var copy = osmEntity(this, {
+             id: undefined,
+             user: undefined,
+             version: undefined
+           });
+           copies[this.id] = copy;
+           return copy;
+         },
+         osmId: function osmId() {
+           return osmEntity.id.toOSM(this.id);
+         },
+         isNew: function isNew() {
+           return this.osmId() < 0;
+         },
+         update: function update(attrs) {
+           return osmEntity(this, attrs, {
+             v: 1 + (this.v || 0)
+           });
+         },
+         mergeTags: function mergeTags(tags) {
+           var merged = Object.assign({}, this.tags); // shallow copy

 
 

-       /*property
-           JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
-           getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
-           lastIndex, length, parse, prototype, push, replace, slice, stringify,
-           test, toJSON, toString, valueOf
-       */
+           var changed = false;
+
+           for (var k in tags) {
+             var t1 = merged[k];
+             var t2 = tags[k];
+
+             if (!t1) {
+               changed = true;
+               merged[k] = t2;
+             } else if (t1 !== t2) {
+               changed = true;
+               merged[k] = utilUnicodeCharsTruncated(utilArrayUnion(t1.split(/;\s*/), t2.split(/;\s*/)).join(';'), 255 // avoid exceeding character limit; see also services/osm.js -> maxCharsForTagValue()
+               );
+             }
+           }

 
 

+           return changed ? this.update({
+             tags: merged
+           }) : this;
+         },
+         intersects: function intersects(extent, resolver) {
+           return this.extent(resolver).intersects(extent);
+         },
+         hasNonGeometryTags: function hasNonGeometryTags() {
+           return Object.keys(this.tags).some(function (k) {
+             return k !== 'area';
+           });
+         },
+         hasParentRelations: function hasParentRelations(resolver) {
+           return resolver.parentRelations(this).length > 0;
+         },
+         hasInterestingTags: function hasInterestingTags() {
+           return Object.keys(this.tags).some(osmIsInterestingTag);
+         },
+         isHighwayIntersection: function isHighwayIntersection() {
+           return false;
+         },
+         isDegenerate: function isDegenerate() {
+           return true;
+         },
+         deprecatedTags: function deprecatedTags(dataDeprecated) {
+           var tags = this.tags; // if there are no tags, none can be deprecated
+
+           if (Object.keys(tags).length === 0) return [];
+           var deprecated = [];
+           dataDeprecated.forEach(function (d) {
+             var oldKeys = Object.keys(d.old);
+
+             if (d.replace) {
+               var hasExistingValues = Object.keys(d.replace).some(function (replaceKey) {
+                 if (!tags[replaceKey] || d.old[replaceKey]) return false;
+                 var replaceValue = d.replace[replaceKey];
+                 if (replaceValue === '*') return false;
+                 if (replaceValue === tags[replaceKey]) return false;
+                 return true;
+               }); // don't flag deprecated tags if the upgrade path would overwrite existing data - #7843

 
 

-       // Create a JSON object only if one does not already exist. We create the
-       // methods in a closure to avoid creating global variables.
+               if (hasExistingValues) return;
+             }
+
+             var matchesDeprecatedTags = oldKeys.every(function (oldKey) {
+               if (!tags[oldKey]) return false;
+               if (d.old[oldKey] === '*') return true;
+               if (d.old[oldKey] === tags[oldKey]) return true;
+               var vals = tags[oldKey].split(';').filter(Boolean);
+
+               if (vals.length === 0) {
+                 return false;
+               } else if (vals.length > 1) {
+                 return vals.indexOf(d.old[oldKey]) !== -1;
+               } else {
+                 if (tags[oldKey] === d.old[oldKey]) {
+                   if (d.replace && d.old[oldKey] === d.replace[oldKey]) {
+                     var replaceKeys = Object.keys(d.replace);
+                     return !replaceKeys.every(function (replaceKey) {
+                       return tags[replaceKey] === d.replace[replaceKey];
+                     });
+                   } else {
+                     return true;
+                   }
+                 }
+               }
+
+               return false;
+             });
+
+             if (matchesDeprecatedTags) {
+               deprecated.push(d);
+             }
+           });
+           return deprecated;
+         }
+       };

 
 

-       if (typeof JSON !== "object") {
-           JSON = {};
+       function osmLanes(entity) {
+         if (entity.type !== 'way') return null;
+         if (!entity.tags.highway) return null;
+         var tags = entity.tags;
+         var isOneWay = entity.isOneWay();
+         var laneCount = getLaneCount(tags, isOneWay);
+         var maxspeed = parseMaxspeed(tags);
+         var laneDirections = parseLaneDirections(tags, isOneWay, laneCount);
+         var forward = laneDirections.forward;
+         var backward = laneDirections.backward;
+         var bothways = laneDirections.bothways; // parse the piped string 'x|y|z' format
+
+         var turnLanes = {};
+         turnLanes.unspecified = parseTurnLanes(tags['turn:lanes']);
+         turnLanes.forward = parseTurnLanes(tags['turn:lanes:forward']);
+         turnLanes.backward = parseTurnLanes(tags['turn:lanes:backward']);
+         var maxspeedLanes = {};
+         maxspeedLanes.unspecified = parseMaxspeedLanes(tags['maxspeed:lanes'], maxspeed);
+         maxspeedLanes.forward = parseMaxspeedLanes(tags['maxspeed:lanes:forward'], maxspeed);
+         maxspeedLanes.backward = parseMaxspeedLanes(tags['maxspeed:lanes:backward'], maxspeed);
+         var psvLanes = {};
+         psvLanes.unspecified = parseMiscLanes(tags['psv:lanes']);
+         psvLanes.forward = parseMiscLanes(tags['psv:lanes:forward']);
+         psvLanes.backward = parseMiscLanes(tags['psv:lanes:backward']);
+         var busLanes = {};
+         busLanes.unspecified = parseMiscLanes(tags['bus:lanes']);
+         busLanes.forward = parseMiscLanes(tags['bus:lanes:forward']);
+         busLanes.backward = parseMiscLanes(tags['bus:lanes:backward']);
+         var taxiLanes = {};
+         taxiLanes.unspecified = parseMiscLanes(tags['taxi:lanes']);
+         taxiLanes.forward = parseMiscLanes(tags['taxi:lanes:forward']);
+         taxiLanes.backward = parseMiscLanes(tags['taxi:lanes:backward']);
+         var hovLanes = {};
+         hovLanes.unspecified = parseMiscLanes(tags['hov:lanes']);
+         hovLanes.forward = parseMiscLanes(tags['hov:lanes:forward']);
+         hovLanes.backward = parseMiscLanes(tags['hov:lanes:backward']);
+         var hgvLanes = {};
+         hgvLanes.unspecified = parseMiscLanes(tags['hgv:lanes']);
+         hgvLanes.forward = parseMiscLanes(tags['hgv:lanes:forward']);
+         hgvLanes.backward = parseMiscLanes(tags['hgv:lanes:backward']);
+         var bicyclewayLanes = {};
+         bicyclewayLanes.unspecified = parseBicycleWay(tags['bicycleway:lanes']);
+         bicyclewayLanes.forward = parseBicycleWay(tags['bicycleway:lanes:forward']);
+         bicyclewayLanes.backward = parseBicycleWay(tags['bicycleway:lanes:backward']);
+         var lanesObj = {
+           forward: [],
+           backward: [],
+           unspecified: []
+         }; // map forward/backward/unspecified of each lane type to lanesObj
+
+         mapToLanesObj(lanesObj, turnLanes, 'turnLane');
+         mapToLanesObj(lanesObj, maxspeedLanes, 'maxspeed');
+         mapToLanesObj(lanesObj, psvLanes, 'psv');
+         mapToLanesObj(lanesObj, busLanes, 'bus');
+         mapToLanesObj(lanesObj, taxiLanes, 'taxi');
+         mapToLanesObj(lanesObj, hovLanes, 'hov');
+         mapToLanesObj(lanesObj, hgvLanes, 'hgv');
+         mapToLanesObj(lanesObj, bicyclewayLanes, 'bicycleway');
+         return {
+           metadata: {
+             count: laneCount,
+             oneway: isOneWay,
+             forward: forward,
+             backward: backward,
+             bothways: bothways,
+             turnLanes: turnLanes,
+             maxspeed: maxspeed,
+             maxspeedLanes: maxspeedLanes,
+             psvLanes: psvLanes,
+             busLanes: busLanes,
+             taxiLanes: taxiLanes,
+             hovLanes: hovLanes,
+             hgvLanes: hgvLanes,
+             bicyclewayLanes: bicyclewayLanes
+           },
+           lanes: lanesObj
+         };

        }
 
        }
 

-       (function () {
+       function getLaneCount(tags, isOneWay) {
+         var count;

 
 

-           var rx_one = /^[\],:{}\s]*$/;
-           var rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
-           var rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
-           var rx_four = /(?:^|:|,)(?:\s*\[)+/g;
-           var rx_escapable = /[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
-           var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+         if (tags.lanes) {
+           count = parseInt(tags.lanes, 10);

 
 

-           function f(n) {
-               // Format integers to have at least two digits.
-               return n < 10
-                   ? "0" + n
-                   : n;
+           if (count > 0) {
+             return count;

            }
            }

+         }

 
 

-           function this_value() {
-               return this.valueOf();
-           }
+         switch (tags.highway) {
+           case 'trunk':
+           case 'motorway':
+             count = isOneWay ? 2 : 4;
+             break;

 
 

-           if (typeof Date.prototype.toJSON !== "function") {
+           default:
+             count = isOneWay ? 1 : 2;
+             break;
+         }

 
 

-               Date.prototype.toJSON = function () {
+         return count;
+       }

 
 

-                   return isFinite(this.valueOf())
-                       ? this.getUTCFullYear() + "-" +
-                               f(this.getUTCMonth() + 1) + "-" +
-                               f(this.getUTCDate()) + "T" +
-                               f(this.getUTCHours()) + ":" +
-                               f(this.getUTCMinutes()) + ":" +
-                               f(this.getUTCSeconds()) + "Z"
-                       : null;
-               };
+       function parseMaxspeed(tags) {
+         var maxspeed = tags.maxspeed;
+         if (!maxspeed) return;
+         var maxspeedRegex = /^([0-9][\.0-9]+?)(?:[ ]?(?:km\/h|kmh|kph|mph|knots))?$/;
+         if (!maxspeedRegex.test(maxspeed)) return;
+         return parseInt(maxspeed, 10);
+       }

 
 

-               Boolean.prototype.toJSON = this_value;
-               Number.prototype.toJSON = this_value;
-               String.prototype.toJSON = this_value;
+       function parseLaneDirections(tags, isOneWay, laneCount) {
+         var forward = parseInt(tags['lanes:forward'], 10);
+         var backward = parseInt(tags['lanes:backward'], 10);
+         var bothways = parseInt(tags['lanes:both_ways'], 10) > 0 ? 1 : 0;
+
+         if (parseInt(tags.oneway, 10) === -1) {
+           forward = 0;
+           bothways = 0;
+           backward = laneCount;
+         } else if (isOneWay) {
+           forward = laneCount;
+           bothways = 0;
+           backward = 0;
+         } else if (isNaN(forward) && isNaN(backward)) {
+           backward = Math.floor((laneCount - bothways) / 2);
+           forward = laneCount - bothways - backward;
+         } else if (isNaN(forward)) {
+           if (backward > laneCount - bothways) {
+             backward = laneCount - bothways;
+           }
+
+           forward = laneCount - bothways - backward;
+         } else if (isNaN(backward)) {
+           if (forward > laneCount - bothways) {
+             forward = laneCount - bothways;

            }
 
            }
 

-           var gap;
-           var indent;
-           var meta;
-           var rep;
+           backward = laneCount - bothways - forward;
+         }

 
 

+         return {
+           forward: forward,
+           backward: backward,
+           bothways: bothways
+         };
+       }

 
 

-           function quote(string) {
+       function parseTurnLanes(tag) {
+         if (!tag) return;
+         var validValues = ['left', 'slight_left', 'sharp_left', 'through', 'right', 'slight_right', 'sharp_right', 'reverse', 'merge_to_left', 'merge_to_right', 'none'];
+         return tag.split('|').map(function (s) {
+           if (s === '') s = 'none';
+           return s.split(';').map(function (d) {
+             return validValues.indexOf(d) === -1 ? 'unknown' : d;
+           });
+         });
+       }

 
 

-       // If the string contains no control characters, no quote characters, and no
-       // backslash characters, then we can safely slap some quotes around it.
-       // Otherwise we must also replace the offending characters with safe escape
-       // sequences.
+       function parseMaxspeedLanes(tag, maxspeed) {
+         if (!tag) return;
+         return tag.split('|').map(function (s) {
+           if (s === 'none') return s;
+           var m = parseInt(s, 10);
+           if (s === '' || m === maxspeed) return null;
+           return isNaN(m) ? 'unknown' : m;
+         });
+       }

 
 

-               rx_escapable.lastIndex = 0;
-               return rx_escapable.test(string)
-                   ? "\"" + string.replace(rx_escapable, function (a) {
-                       var c = meta[a];
-                       return typeof c === "string"
-                           ? c
-                           : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
-                   }) + "\""
-                   : "\"" + string + "\"";
-           }
+       function parseMiscLanes(tag) {
+         if (!tag) return;
+         var validValues = ['yes', 'no', 'designated'];
+         return tag.split('|').map(function (s) {
+           if (s === '') s = 'no';
+           return validValues.indexOf(s) === -1 ? 'unknown' : s;
+         });
+       }
+
+       function parseBicycleWay(tag) {
+         if (!tag) return;
+         var validValues = ['yes', 'no', 'designated', 'lane'];
+         return tag.split('|').map(function (s) {
+           if (s === '') s = 'no';
+           return validValues.indexOf(s) === -1 ? 'unknown' : s;
+         });
+       }

 
 

+       function mapToLanesObj(lanesObj, data, key) {
+         if (data.forward) {
+           data.forward.forEach(function (l, i) {
+             if (!lanesObj.forward[i]) lanesObj.forward[i] = {};
+             lanesObj.forward[i][key] = l;
+           });
+         }

 
 

-           function str(key, holder) {
+         if (data.backward) {
+           data.backward.forEach(function (l, i) {
+             if (!lanesObj.backward[i]) lanesObj.backward[i] = {};
+             lanesObj.backward[i][key] = l;
+           });
+         }

 
 

-       // Produce a string from holder[key].
+         if (data.unspecified) {
+           data.unspecified.forEach(function (l, i) {
+             if (!lanesObj.unspecified[i]) lanesObj.unspecified[i] = {};
+             lanesObj.unspecified[i][key] = l;
+           });
+         }
+       }

 
 

-               var i;          // The loop counter.
-               var k;          // The member key.
-               var v;          // The member value.
-               var length;
-               var mind = gap;
-               var partial;
-               var value = holder[key];
+       function osmWay() {
+         if (!(this instanceof osmWay)) {
+           return new osmWay().initialize(arguments);
+         } else if (arguments.length) {
+           this.initialize(arguments);
+         }
+       }
+       osmEntity.way = osmWay;
+       osmWay.prototype = Object.create(osmEntity.prototype);
+       Object.assign(osmWay.prototype, {
+         type: 'way',
+         nodes: [],
+         copy: function copy(resolver, copies) {
+           if (copies[this.id]) return copies[this.id];
+           var copy = osmEntity.prototype.copy.call(this, resolver, copies);
+           var nodes = this.nodes.map(function (id) {
+             return resolver.entity(id).copy(resolver, copies).id;
+           });
+           copy = copy.update({
+             nodes: nodes
+           });
+           copies[this.id] = copy;
+           return copy;
+         },
+         extent: function extent(resolver) {
+           return resolver["transient"](this, 'extent', function () {
+             var extent = geoExtent();

 
 

-       // If the value has a toJSON method, call it to obtain a replacement value.
+             for (var i = 0; i < this.nodes.length; i++) {
+               var node = resolver.hasEntity(this.nodes[i]);

 
 

-               if (value && typeof value === "object" &&
-                       typeof value.toJSON === "function") {
-                   value = value.toJSON(key);
+               if (node) {
+                 extent._extend(node.extent());

                }
                }

+             }
+
+             return extent;
+           });
+         },
+         first: function first() {
+           return this.nodes[0];
+         },
+         last: function last() {
+           return this.nodes[this.nodes.length - 1];
+         },
+         contains: function contains(node) {
+           return this.nodes.indexOf(node) >= 0;
+         },
+         affix: function affix(node) {
+           if (this.nodes[0] === node) return 'prefix';
+           if (this.nodes[this.nodes.length - 1] === node) return 'suffix';
+         },
+         layer: function layer() {
+           // explicit layer tag, clamp between -10, 10..
+           if (isFinite(this.tags.layer)) {
+             return Math.max(-10, Math.min(+this.tags.layer, 10));
+           } // implied layer tag..
+
+
+           if (this.tags.covered === 'yes') return -1;
+           if (this.tags.location === 'overground') return 1;
+           if (this.tags.location === 'underground') return -1;
+           if (this.tags.location === 'underwater') return -10;
+           if (this.tags.power === 'line') return 10;
+           if (this.tags.power === 'minor_line') return 10;
+           if (this.tags.aerialway) return 10;
+           if (this.tags.bridge) return 1;
+           if (this.tags.cutting) return -1;
+           if (this.tags.tunnel) return -1;
+           if (this.tags.waterway) return -1;
+           if (this.tags.man_made === 'pipeline') return -10;
+           if (this.tags.boundary) return -10;
+           return 0;
+         },
+         // the approximate width of the line based on its tags except its `width` tag
+         impliedLineWidthMeters: function impliedLineWidthMeters() {
+           var averageWidths = {
+             highway: {
+               // width is for single lane
+               motorway: 5,
+               motorway_link: 5,
+               trunk: 4.5,
+               trunk_link: 4.5,
+               primary: 4,
+               secondary: 4,
+               tertiary: 4,
+               primary_link: 4,
+               secondary_link: 4,
+               tertiary_link: 4,
+               unclassified: 4,
+               road: 4,
+               living_street: 4,
+               bus_guideway: 4,
+               pedestrian: 4,
+               residential: 3.5,
+               service: 3.5,
+               track: 3,
+               cycleway: 2.5,
+               bridleway: 2,
+               corridor: 2,
+               steps: 2,
+               path: 1.5,
+               footway: 1.5
+             },
+             railway: {
+               // width includes ties and rail bed, not just track gauge
+               rail: 2.5,
+               light_rail: 2.5,
+               tram: 2.5,
+               subway: 2.5,
+               monorail: 2.5,
+               funicular: 2.5,
+               disused: 2.5,
+               preserved: 2.5,
+               miniature: 1.5,
+               narrow_gauge: 1.5
+             },
+             waterway: {
+               river: 50,
+               canal: 25,
+               stream: 5,
+               tidal_channel: 5,
+               fish_pass: 2.5,
+               drain: 2.5,
+               ditch: 1.5
+             }
+           };

 
 

-       // If we were called with a replacer function, then call the replacer to
-       // obtain a replacement value.
+           for (var key in averageWidths) {
+             if (this.tags[key] && averageWidths[key][this.tags[key]]) {
+               var width = averageWidths[key][this.tags[key]];

 
 

-               if (typeof rep === "function") {
-                   value = rep.call(holder, key, value);
+               if (key === 'highway') {
+                 var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
+                 if (!laneCount) laneCount = this.isOneWay() ? 1 : 2;
+                 return width * laneCount;

                }
 
                }
 

-       // What happens next depends on the value's type.
+               return width;
+             }
+           }
+
+           return null;
+         },
+         isOneWay: function isOneWay() {
+           // explicit oneway tag..
+           var values = {
+             'yes': true,
+             '1': true,
+             '-1': true,
+             'reversible': true,
+             'alternating': true,
+             'no': false,
+             '0': false
+           };

 
 

-               switch (typeof value) {
-               case "string":
-                   return quote(value);
+           if (values[this.tags.oneway] !== undefined) {
+             return values[this.tags.oneway];
+           } // implied oneway tag..

 
 

-               case "number":

 
 

-       // JSON numbers must be finite. Encode non-finite numbers as null.
+           for (var key in this.tags) {
+             if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) {
+               return true;
+             }
+           }

 
 

-                   return isFinite(value)
-                       ? String(value)
-                       : "null";
+           return false;
+         },
+         // Some identifier for tag that implies that this way is "sided",
+         // i.e. the right side is the 'inside' (e.g. the right side of a
+         // natural=cliff is lower).
+         sidednessIdentifier: function sidednessIdentifier() {
+           for (var key in this.tags) {
+             var value = this.tags[key];
+
+             if (key in osmRightSideIsInsideTags && value in osmRightSideIsInsideTags[key]) {
+               if (osmRightSideIsInsideTags[key][value] === true) {
+                 return key;
+               } else {
+                 // if the map's value is something other than a
+                 // literal true, we should use it so we can
+                 // special case some keys (e.g. natural=coastline
+                 // is handled differently to other naturals).
+                 return osmRightSideIsInsideTags[key][value];
+               }
+             }
+           }

 
 

-               case "boolean":
-               case "null":
+           return null;
+         },
+         isSided: function isSided() {
+           if (this.tags.two_sided === 'yes') {
+             return false;
+           }

 
 

-       // If the value is a boolean or null, convert it to a string. Note:
-       // typeof null does not produce "null". The case is included here in
-       // the remote chance that this gets fixed someday.
+           return this.sidednessIdentifier() !== null;
+         },
+         lanes: function lanes() {
+           return osmLanes(this);
+         },
+         isClosed: function isClosed() {
+           return this.nodes.length > 1 && this.first() === this.last();
+         },
+         isConvex: function isConvex(resolver) {
+           if (!this.isClosed() || this.isDegenerate()) return null;
+           var nodes = utilArrayUniq(resolver.childNodes(this));
+           var coords = nodes.map(function (n) {
+             return n.loc;
+           });
+           var curr = 0;
+           var prev = 0;

 
 

-                   return String(value);
+           for (var i = 0; i < coords.length; i++) {
+             var o = coords[(i + 1) % coords.length];
+             var a = coords[i];
+             var b = coords[(i + 2) % coords.length];
+             var res = geoVecCross(a, b, o);
+             curr = res > 0 ? 1 : res < 0 ? -1 : 0;

 
 

-       // If the type is "object", we might be dealing with an object or an array or
-       // null.
+             if (curr === 0) {
+               continue;
+             } else if (prev && curr !== prev) {
+               return false;
+             }

 
 

-               case "object":
+             prev = curr;
+           }

 
 

-       // Due to a specification blunder in ECMAScript, typeof null is "object",
-       // so watch out for that case.
+           return true;
+         },
+         // returns an object with the tag that implies this is an area, if any
+         tagSuggestingArea: function tagSuggestingArea() {
+           return osmTagSuggestingArea(this.tags);
+         },
+         isArea: function isArea() {
+           if (this.tags.area === 'yes') return true;
+           if (!this.isClosed() || this.tags.area === 'no') return false;
+           return this.tagSuggestingArea() !== null;
+         },
+         isDegenerate: function isDegenerate() {
+           return new Set(this.nodes).size < (this.isArea() ? 3 : 2);
+         },
+         areAdjacent: function areAdjacent(n1, n2) {
+           for (var i = 0; i < this.nodes.length; i++) {
+             if (this.nodes[i] === n1) {
+               if (this.nodes[i - 1] === n2) return true;
+               if (this.nodes[i + 1] === n2) return true;
+             }
+           }

 
 

-                   if (!value) {
-                       return "null";
-                   }
+           return false;
+         },
+         geometry: function geometry(graph) {
+           return graph["transient"](this, 'geometry', function () {
+             return this.isArea() ? 'area' : 'line';
+           });
+         },
+         // returns an array of objects representing the segments between the nodes in this way
+         segments: function segments(graph) {
+           function segmentExtent(graph) {
+             var n1 = graph.hasEntity(this.nodes[0]);
+             var n2 = graph.hasEntity(this.nodes[1]);
+             return n1 && n2 && geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]);
+           }
+
+           return graph["transient"](this, 'segments', function () {
+             var segments = [];
+
+             for (var i = 0; i < this.nodes.length - 1; i++) {
+               segments.push({
+                 id: this.id + '-' + i,
+                 wayId: this.id,
+                 index: i,
+                 nodes: [this.nodes[i], this.nodes[i + 1]],
+                 extent: segmentExtent
+               });
+             }

 
 

-       // Make an array to hold the partial results of stringifying this object value.
+             return segments;
+           });
+         },
+         // If this way is not closed, append the beginning node to the end of the nodelist to close it.
+         close: function close() {
+           if (this.isClosed() || !this.nodes.length) return this;
+           var nodes = this.nodes.slice();
+           nodes = nodes.filter(noRepeatNodes);
+           nodes.push(nodes[0]);
+           return this.update({
+             nodes: nodes
+           });
+         },
+         // If this way is closed, remove any connector nodes from the end of the nodelist to unclose it.
+         unclose: function unclose() {
+           if (!this.isClosed()) return this;
+           var nodes = this.nodes.slice();
+           var connector = this.first();
+           var i = nodes.length - 1; // remove trailing connectors..

 
 

-                   gap += indent;
-                   partial = [];
+           while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+             nodes.splice(i, 1);
+             i = nodes.length - 1;
+           }

 
 

-       // Is the value an array?
+           nodes = nodes.filter(noRepeatNodes);
+           return this.update({
+             nodes: nodes
+           });
+         },
+         // Adds a node (id) in front of the node which is currently at position index.
+         // If index is undefined, the node will be added to the end of the way for linear ways,
+         //   or just before the final connecting node for circular ways.
+         // Consecutive duplicates are eliminated including existing ones.
+         // Circularity is always preserved when adding a node.
+         addNode: function addNode(id, index) {
+           var nodes = this.nodes.slice();
+           var isClosed = this.isClosed();
+           var max = isClosed ? nodes.length - 1 : nodes.length;

 
 

-                   if (Object.prototype.toString.apply(value) === "[object Array]") {
+           if (index === undefined) {
+             index = max;
+           }

 
 

-       // The value is an array. Stringify every element. Use null as a placeholder
-       // for non-JSON values.
+           if (index < 0 || index > max) {
+             throw new RangeError('index ' + index + ' out of range 0..' + max);
+           } // If this is a closed way, remove all connector nodes except the first one
+           // (there may be duplicates) and adjust index if necessary..

 
 

-                       length = value.length;
-                       for (i = 0; i < length; i += 1) {
-                           partial[i] = str(i, value) || "null";
-                       }

 
 

-       // Join all of the elements together, separated with commas, and wrap them in
-       // brackets.
+           if (isClosed) {
+             var connector = this.first(); // leading connectors..

 
 

-                       v = partial.length === 0
-                           ? "[]"
-                           : gap
-                               ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]"
-                               : "[" + partial.join(",") + "]";
-                       gap = mind;
-                       return v;
-                   }
+             var i = 1;

 
 

-       // If the replacer is an array, use it to select the members to be stringified.
-
-                   if (rep && typeof rep === "object") {
-                       length = rep.length;
-                       for (i = 0; i < length; i += 1) {
-                           if (typeof rep[i] === "string") {
-                               k = rep[i];
-                               v = str(k, value);
-                               if (v) {
-                                   partial.push(quote(k) + (
-                                       gap
-                                           ? ": "
-                                           : ":"
-                                   ) + v);
-                               }
-                           }
-                       }
-                   } else {
+             while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index > i) index--;
+             } // trailing connectors..

 
 

-       // Otherwise, iterate through all of the keys in the object.
-
-                       for (k in value) {
-                           if (Object.prototype.hasOwnProperty.call(value, k)) {
-                               v = str(k, value);
-                               if (v) {
-                                   partial.push(quote(k) + (
-                                       gap
-                                           ? ": "
-                                           : ":"
-                                   ) + v);
-                               }
-                           }
-                       }
-                   }

 
 

-       // Join all of the member texts together, separated with commas,
-       // and wrap them in braces.
+             i = nodes.length - 1;

 
 

-                   v = partial.length === 0
-                       ? "{}"
-                       : gap
-                           ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}"
-                           : "{" + partial.join(",") + "}";
-                   gap = mind;
-                   return v;
-               }
+             while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index > i) index--;
+               i = nodes.length - 1;
+             }

            }
 
            }
 

-       // If the JSON object does not yet have a stringify method, give it one.
+           nodes.splice(index, 0, id);
+           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..

 
 

-           if (typeof JSON.stringify !== "function") {
-               meta = {    // table of character substitutions
-                   "\b": "\\b",
-                   "\t": "\\t",
-                   "\n": "\\n",
-                   "\f": "\\f",
-                   "\r": "\\r",
-                   "\"": "\\\"",
-                   "\\": "\\\\"
-               };
-               JSON.stringify = function (value, replacer, space) {
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
+           }

 
 

-       // The stringify method takes a value and an optional replacer, and an optional
-       // space parameter, and returns a JSON text. The replacer can be a function
-       // that can replace values, or an array of strings that will select the keys.
-       // A default replacer method can be provided. Use of the space parameter can
-       // produce text that is more easily readable.
+           return this.update({
+             nodes: nodes
+           });
+         },
+         // Replaces the node which is currently at position index with the given node (id).
+         // Consecutive duplicates are eliminated including existing ones.
+         // Circularity is preserved when updating a node.
+         updateNode: function updateNode(id, index) {
+           var nodes = this.nodes.slice();
+           var isClosed = this.isClosed();
+           var max = nodes.length - 1;

 
 

-                   var i;
-                   gap = "";
-                   indent = "";
+           if (index === undefined || index < 0 || index > max) {
+             throw new RangeError('index ' + index + ' out of range 0..' + max);
+           } // If this is a closed way, remove all connector nodes except the first one
+           // (there may be duplicates) and adjust index if necessary..

 
 

-       // If the space parameter is a number, make an indent string containing that
-       // many spaces.

 
 

-                   if (typeof space === "number") {
-                       for (i = 0; i < space; i += 1) {
-                           indent += " ";
-                       }
+           if (isClosed) {
+             var connector = this.first(); // leading connectors..

 
 

-       // If the space parameter is a string, it will be used as the indent string.
+             var i = 1;

 
 

-                   } else if (typeof space === "string") {
-                       indent = space;
-                   }
+             while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index > i) index--;
+             } // trailing connectors..

 
 

-       // If there is a replacer, it must be a function or an array.
-       // Otherwise, throw an error.

 
 

-                   rep = replacer;
-                   if (replacer && typeof replacer !== "function" &&
-                           (typeof replacer !== "object" ||
-                           typeof replacer.length !== "number")) {
-                       throw new Error("JSON.stringify");
-                   }
+             i = nodes.length - 1;

 
 

-       // Make a fake root object containing our value under the key of "".
-       // Return the result of stringifying the value.
+             while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index === i) index = 0; // update leading connector instead

 
 

-                   return str("", {"": value});
-               };
+               i = nodes.length - 1;
+             }

            }
 
            }
 

+           nodes.splice(index, 1, id);
+           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..

 
 

-       // If the JSON object does not yet have a parse method, give it one.
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
+           }

 
 

-           if (typeof JSON.parse !== "function") {
-               JSON.parse = function (text, reviver) {
+           return this.update({
+             nodes: nodes
+           });
+         },
+         // Replaces each occurrence of node id needle with replacement.
+         // Consecutive duplicates are eliminated including existing ones.
+         // Circularity is preserved.
+         replaceNode: function replaceNode(needleID, replacementID) {
+           var nodes = this.nodes.slice();
+           var isClosed = this.isClosed();
+
+           for (var i = 0; i < nodes.length; i++) {
+             if (nodes[i] === needleID) {
+               nodes[i] = replacementID;
+             }
+           }

 
 

-       // The parse method takes a text and an optional reviver function, and returns
-       // a JavaScript value if the text is a valid JSON text.
+           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..

 
 

-                   var j;
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
+           }

 
 

-                   function walk(holder, key) {
-
-       // The walk method is used to recursively walk the resulting structure so
-       // that modifications can be made.
-
-                       var k;
-                       var v;
-                       var value = holder[key];
-                       if (value && typeof value === "object") {
-                           for (k in value) {
-                               if (Object.prototype.hasOwnProperty.call(value, k)) {
-                                   v = walk(value, k);
-                                   if (v !== undefined) {
-                                       value[k] = v;
-                                   } else {
-                                       delete value[k];
-                                   }
-                               }
-                           }
-                       }
-                       return reviver.call(holder, key, value);
+           return this.update({
+             nodes: nodes
+           });
+         },
+         // Removes each occurrence of node id.
+         // Consecutive duplicates are eliminated including existing ones.
+         // Circularity is preserved.
+         removeNode: function removeNode(id) {
+           var nodes = this.nodes.slice();
+           var isClosed = this.isClosed();
+           nodes = nodes.filter(function (node) {
+             return node !== id;
+           }).filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
+           }
+
+           return this.update({
+             nodes: nodes
+           });
+         },
+         asJXON: function asJXON(changeset_id) {
+           var r = {
+             way: {
+               '@id': this.osmId(),
+               '@version': this.version || 0,
+               nd: this.nodes.map(function (id) {
+                 return {
+                   keyAttributes: {
+                     ref: osmEntity.id.toOSM(id)

                    }
                    }

-
-
-       // Parsing happens in four stages. In the first stage, we replace certain
-       // Unicode characters with escape sequences. JavaScript handles many characters
-       // incorrectly, either silently deleting them, or treating them as line endings.
-
-                   text = String(text);
-                   rx_dangerous.lastIndex = 0;
-                   if (rx_dangerous.test(text)) {
-                       text = text.replace(rx_dangerous, function (a) {
-                           return "\\u" +
-                                   ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
-                       });
+                 };
+               }, this),
+               tag: Object.keys(this.tags).map(function (k) {
+                 return {
+                   keyAttributes: {
+                     k: k,
+                     v: this.tags[k]

                    }
                    }

+                 };
+               }, this)
+             }
+           };

 
 

-       // In the second stage, we run the text against regular expressions that look
-       // for non-JSON patterns. We are especially concerned with "()" and "new"
-       // because they can cause invocation, and "=" because it can cause mutation.
-       // But just to be safe, we want to reject all unexpected forms.
-
-       // We split the second stage into 4 regexp operations in order to work around
-       // crippling inefficiencies in IE's and Safari's regexp engines. First we
-       // replace the JSON backslash pairs with "@" (a non-JSON character). Second, we
-       // replace all simple value tokens with "]" characters. Third, we delete all
-       // open brackets that follow a colon or comma or that begin the text. Finally,
-       // we look to see that the remaining characters are only whitespace or "]" or
-       // "," or ":" or "{" or "}". If that is so, then the text is safe for eval.
-
-                   if (
-                       rx_one.test(
-                           text
-                               .replace(rx_two, "@")
-                               .replace(rx_three, "]")
-                               .replace(rx_four, "")
-                       )
-                   ) {
-
-       // In the third stage we use the eval function to compile the text into a
-       // JavaScript structure. The "{" operator is subject to a syntactic ambiguity
-       // in JavaScript: it can begin a block or an object literal. We wrap the text
-       // in parens to eliminate the ambiguity.
-
-                       j = eval("(" + text + ")");
-
-       // In the optional fourth stage, we recursively walk the new structure, passing
-       // each name/value pair to a reviver function for possible transformation.
-
-                       return (typeof reviver === "function")
-                           ? walk({"": j}, "")
-                           : j;
-                   }
+           if (changeset_id) {
+             r.way['@changeset'] = changeset_id;
+           }

 
 

-       // If the text is not JSON parseable, then a SyntaxError is thrown.
+           return r;
+         },
+         asGeoJSON: function asGeoJSON(resolver) {
+           return resolver["transient"](this, 'GeoJSON', function () {
+             var coordinates = resolver.childNodes(this).map(function (n) {
+               return n.loc;
+             });

 
 

-                   throw new SyntaxError("JSON.parse");
+             if (this.isArea() && this.isClosed()) {
+               return {
+                 type: 'Polygon',
+                 coordinates: [coordinates]

                };
                };

-           }
-       }());
+             } else {
+               return {
+                 type: 'LineString',
+                 coordinates: coordinates
+               };
+             }
+           });
+         },
+         area: function area(resolver) {
+           return resolver["transient"](this, 'area', function () {
+             var nodes = resolver.childNodes(this);
+             var json = {
+               type: 'Polygon',
+               coordinates: [nodes.map(function (n) {
+                 return n.loc;
+               })]
+             };

 
 

-       var json2 = json2Plugin;
+             if (!this.isClosed() && nodes.length) {
+               json.coordinates[0].push(nodes[0].loc);
+             }

 
 

-       function json2Plugin() {
-               
-               return {}
-       }
+             var area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
+             // that OpenStreetMap polygons are not hemisphere-spanning.

 
 

-       var plugins = [json2];
+             if (area > 2 * Math.PI) {
+               json.coordinates[0] = json.coordinates[0].reverse();
+               area = d3_geoArea(json);
+             }
+
+             return isNaN(area) ? 0 : area;
+           });
+         }
+       }); // Filter function to eliminate consecutive duplicates.

 
 

-       var store_legacy = storeEngine.createStore(all, plugins);
+       function noRepeatNodes(node, i, arr) {
+         return i === 0 || node !== arr[i - 1];
+       }

 
 

-       // # osm-auth

        //
        //

-       // This code is only compatible with IE10+ because the [XDomainRequest](http://bit.ly/LfO7xo)
-       // object, IE<10's idea of [CORS](http://en.wikipedia.org/wiki/Cross-origin_resource_sharing),
-       // does not support custom headers, which this uses everywhere.
-       var osmAuth = function(o) {
+       // 1. Relation tagged with `type=multipolygon` and no interesting tags.
+       // 2. One and only one member with the `outer` role. Must be a way with interesting tags.
+       // 3. No members without a role.
+       //
+       // Old multipolygons are no longer recommended but are still rendered as areas by iD.

 
 

-           var oauth = {};
+       function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
+         if (entity.type !== 'relation' || !entity.isMultipolygon() || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
+           return false;
+         }

 
 

-           // authenticated users will also have a request token secret, but it's
-           // not used in transactions with the server
-           oauth.authenticated = function() {
-               return !!(token('oauth_token') && token('oauth_token_secret'));
-           };
+         var outerMember;

 
 

-           oauth.logout = function() {
-               token('oauth_token', '');
-               token('oauth_token_secret', '');
-               token('oauth_request_token_secret', '');
-               return oauth;
-           };
+         for (var memberIndex in entity.members) {
+           var member = entity.members[memberIndex];

 
 

-           // TODO: detect lack of click event
-           oauth.authenticate = function(callback) {
-               if (oauth.authenticated()) { return callback(); }
-
-               oauth.logout();
-
-               // ## Getting a request token
-               var params = timenonce(getAuth(o)),
-                   url = o.url + '/oauth/request_token';
-
-               params.oauth_signature = ohauth_1.signature(
-                   o.oauth_secret, '',
-                   ohauth_1.baseString('POST', url, params));
-
-               if (!o.singlepage) {
-                   // Create a 600x550 popup window in the center of the screen
-                   var w = 600, h = 550,
-                       settings = [
-                           ['width', w], ['height', h],
-                           ['left', screen.width / 2 - w / 2],
-                           ['top', screen.height / 2 - h / 2]].map(function(x) {
-                               return x.join('=');
-                           }).join(','),
-                       popup = window.open('about:blank', 'oauth_window', settings);
-               }
-
-               // Request a request token. When this is complete, the popup
-               // window is redirected to OSM's authorization page.
-               ohauth_1.xhr('POST', url, params, null, {}, reqTokenDone);
-               o.loading();
-
-               function reqTokenDone(err, xhr) {
-                   o.done();
-                   if (err) { return callback(err); }
-                   var resp = ohauth_1.stringQs(xhr.response);
-                   token('oauth_request_token_secret', resp.oauth_token_secret);
-                   var authorize_url = o.url + '/oauth/authorize?' + ohauth_1.qsString({
-                       oauth_token: resp.oauth_token,
-                       oauth_callback: resolveUrl$1(o.landing)
-                   });
+           if (!member.role || member.role === 'outer') {
+             if (outerMember) return false;
+             if (member.type !== 'way') return false;
+             if (!graph.hasEntity(member.id)) return false;
+             outerMember = graph.entity(member.id);

 
 

-                   if (o.singlepage) {
-                       location.href = authorize_url;
-                   } else {
-                       popup.location = authorize_url;
-                   }
-               }
+             if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
+               return false;
+             }
+           }
+         }

 
 

-               // Called by a function in a landing page, in the popup window. The
-               // window closes itself.
-               window.authComplete = function(token) {
-                   var oauth_token = ohauth_1.stringQs(token.split('?')[1]);
-                   get_access_token(oauth_token.oauth_token);
-                   delete window.authComplete;
-               };
+         return outerMember;
+       } // For fixing up rendering of multipolygons with tags on the outer member.
+       // https://github.com/openstreetmap/iD/issues/613

 
 

-               // ## Getting an request token
-               //
-               // At this point we have an `oauth_token`, brought in from a function
-               // call on a landing page popup.
-               function get_access_token(oauth_token) {
-                   var url = o.url + '/oauth/access_token',
-                       params = timenonce(getAuth(o)),
-                       request_token_secret = token('oauth_request_token_secret');
-                   params.oauth_token = oauth_token;
-                   params.oauth_signature = ohauth_1.signature(
-                       o.oauth_secret,
-                       request_token_secret,
-                       ohauth_1.baseString('POST', url, params));
-
-                   // ## Getting an access token
-                   //
-                   // The final token required for authentication. At this point
-                   // we have a `request token secret`
-                   ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-                   o.loading();
-               }
-
-               function accessTokenDone(err, xhr) {
-                   o.done();
-                   if (err) { return callback(err); }
-                   var access_token = ohauth_1.stringQs(xhr.response);
-                   token('oauth_token', access_token.oauth_token);
-                   token('oauth_token_secret', access_token.oauth_token_secret);
-                   callback(null, oauth);
-               }
-           };
+       function osmIsOldMultipolygonOuterMember(entity, graph) {
+         if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0) {
+           return false;
+         }

 
 

-           oauth.bootstrapToken = function(oauth_token, callback) {
-               // ## Getting an request token
-               // At this point we have an `oauth_token`, brought in from a function
-               // call on a landing page popup.
-               function get_access_token(oauth_token) {
-                   var url = o.url + '/oauth/access_token',
-                       params = timenonce(getAuth(o)),
-                       request_token_secret = token('oauth_request_token_secret');
-                   params.oauth_token = oauth_token;
-                   params.oauth_signature = ohauth_1.signature(
-                       o.oauth_secret,
-                       request_token_secret,
-                       ohauth_1.baseString('POST', url, params));
-
-                   // ## Getting an access token
-                   // The final token required for authentication. At this point
-                   // we have a `request token secret`
-                   ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-                   o.loading();
-               }
-
-               function accessTokenDone(err, xhr) {
-                   o.done();
-                   if (err) { return callback(err); }
-                   var access_token = ohauth_1.stringQs(xhr.response);
-                   token('oauth_token', access_token.oauth_token);
-                   token('oauth_token_secret', access_token.oauth_token_secret);
-                   callback(null, oauth);
-               }
-
-               get_access_token(oauth_token);
-           };
+         var parents = graph.parentRelations(entity);
+         if (parents.length !== 1) return false;
+         var parent = parents[0];

 
 

-           // # xhr
-           //
-           // A single XMLHttpRequest wrapper that does authenticated calls if the
-           // user has logged in.
-           oauth.xhr = function(options, callback) {
-               if (!oauth.authenticated()) {
-                   if (o.auto) {
-                       return oauth.authenticate(run);
-                   } else {
-                       callback('not authenticated', null);
-                       return;
-                   }
-               } else {
-                   return run();
-               }
-
-               function run() {
-                   var params = timenonce(getAuth(o)),
-                       oauth_token_secret = token('oauth_token_secret'),
-                       url = (options.prefix !== false) ? o.url + options.path : options.path,
-                       url_parts = url.replace(/#.*$/, '').split('?', 2),
-                       base_url = url_parts[0],
-                       query = (url_parts.length === 2) ? url_parts[1] : '';
-
-                   // https://tools.ietf.org/html/rfc5849#section-3.4.1.3.1
-                   if ((!options.options || !options.options.header ||
-                       options.options.header['Content-Type'] === 'application/x-www-form-urlencoded') &&
-                       options.content) {
-                       params = immutable(params, ohauth_1.stringQs(options.content));
-                   }
+         if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
+           return false;
+         }

 
 

-                   params.oauth_token = token('oauth_token');
-                   params.oauth_signature = ohauth_1.signature(
-                       o.oauth_secret,
-                       oauth_token_secret,
-                       ohauth_1.baseString(options.method, base_url, immutable(params, ohauth_1.stringQs(query)))
-                   );
+         var members = parent.members,
+             member;

 
 

-                   return ohauth_1.xhr(options.method, url, params, options.content, options.options, done);
-               }
+         for (var i = 0; i < members.length; i++) {
+           member = members[i];

 
 

-               function done(err, xhr) {
-                   if (err) { return callback(err); }
-                   else if (xhr.responseXML) { return callback(err, xhr.responseXML); }
-                   else { return callback(err, xhr.response); }
-               }
-           };
+           if (member.id === entity.id && member.role && member.role !== 'outer') {
+             // Not outer member
+             return false;
+           }

 
 

-           // pre-authorize this object, if we can just get a token and token_secret
-           // from the start
-           oauth.preauth = function(c) {
-               if (!c) { return; }
-               if (c.oauth_token) { token('oauth_token', c.oauth_token); }
-               if (c.oauth_token_secret) { token('oauth_token_secret', c.oauth_token_secret); }
-               return oauth;
-           };
+           if (member.id !== entity.id && (!member.role || member.role === 'outer')) {
+             // Not a simple multipolygon
+             return false;
+           }
+         }

 
 

-           oauth.options = function(_) {
-               if (!arguments.length) { return o; }
+         return parent;
+       }
+       function osmOldMultipolygonOuterMember(entity, graph) {
+         if (entity.type !== 'way') return false;
+         var parents = graph.parentRelations(entity);
+         if (parents.length !== 1) return false;
+         var parent = parents[0];
+
+         if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
+           return false;
+         }

 
 

-               o = _;
-               o.url = o.url || 'https://www.openstreetmap.org';
-               o.landing = o.landing || 'land.html';
-               o.singlepage = o.singlepage || false;
+         var members = parent.members,
+             member,
+             outerMember;

 
 

-               // Optional loading and loading-done functions for nice UI feedback.
-               // by default, no-ops
-               o.loading = o.loading || function() {};
-               o.done = o.done || function() {};
+         for (var i = 0; i < members.length; i++) {
+           member = members[i];

 
 

-               return oauth.preauth(o);
-           };
+           if (!member.role || member.role === 'outer') {
+             if (outerMember) return false; // Not a simple multipolygon

 
 

-           // 'stamp' an authentication object from `getAuth()`
-           // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
-           // and timestamp
-           function timenonce(o) {
-               o.oauth_timestamp = ohauth_1.timestamp();
-               o.oauth_nonce = ohauth_1.nonce();
-               return o;
+             outerMember = member;

            }
            }

+         }

 
 

-           // get/set tokens. These are prefixed with the base URL so that `osm-auth`
-           // can be used with multiple APIs and the keys in `localStorage`
-           // will not clash
-           var token;
+         if (!outerMember) return false;
+         var outerEntity = graph.hasEntity(outerMember.id);

 
 

-           if (store_legacy.enabled) {
-               token = function (x, y) {
-                   if (arguments.length === 1) { return store_legacy.get(o.url + x); }
-                   else if (arguments.length === 2) { return store_legacy.set(o.url + x, y); }
-               };
-           } else {
-               var storage = {};
-               token = function (x, y) {
-                   if (arguments.length === 1) { return storage[o.url + x]; }
-                   else if (arguments.length === 2) { return storage[o.url + x] = y; }
-               };
-           }
+         if (!outerEntity || !Object.keys(outerEntity.tags).filter(osmIsInterestingTag).length) {
+           return false;
+         }

 
 

-           // Get an authentication object. If you just add and remove properties
-           // from a single object, you'll need to use `delete` to make sure that
-           // it doesn't contain undesired properties for authentication
-           function getAuth(o) {
-               return {
-                   oauth_consumer_key: o.oauth_consumer_key,
-                   oauth_signature_method: 'HMAC-SHA1'
-               };
-           }
+         return outerEntity;
+       } // Join `toJoin` array into sequences of connecting ways.
+       // Segments which share identical start/end nodes will, as much as possible,
+       // be connected with each other.
+       //
+       // The return value is a nested array. Each constituent array contains elements
+       // of `toJoin` which have been determined to connect.
+       //
+       // Each consitituent array also has a `nodes` property whose value is an
+       // ordered array of member nodes, with appropriate order reversal and
+       // start/end coordinate de-duplication.
+       //
+       // Members of `toJoin` must have, at minimum, `type` and `id` properties.
+       // Thus either an array of `osmWay`s or a relation member array may be used.
+       //
+       // If an member is an `osmWay`, its tags and childnodes may be reversed via
+       // `actionReverse` in the output.
+       //
+       // The returned sequences array also has an `actions` array property, containing
+       // any reversal actions that should be applied to the graph, should the calling
+       // code attempt to actually join the given ways.
+       //
+       // Incomplete members (those for which `graph.hasEntity(element.id)` returns
+       // false) and non-way members are ignored.
+       //
+
+       function osmJoinWays(toJoin, graph) {
+         function resolve(member) {
+           return graph.childNodes(graph.entity(member.id));
+         }

 
 

-           // potentially pre-authorize
-           oauth.options(o);
+         function reverse(item) {
+           var action = actionReverse(item.id, {
+             reverseOneway: true
+           });
+           sequences.actions.push(action);
+           return item instanceof osmWay ? action(graph).entity(item.id) : item;
+         } // make a copy containing only the items to join

 
 

-           return oauth;
-       };

 
 

-       var JXON = new (function () {
-         var
-           sValueProp = 'keyValue', sAttributesProp = 'keyAttributes', sAttrPref = '@', /* you can customize these values */
-           aCache = [], rIsNull = /^\s*$/, rIsBool = /^(?:true|false)$/i;
+         toJoin = toJoin.filter(function (member) {
+           return member.type === 'way' && graph.hasEntity(member.id);
+         }); // Are the things we are joining relation members or `osmWays`?
+         // If `osmWays`, skip the "prefer a forward path" code below (see #4872)

 
 

-         function parseText (sValue) {
-           if (rIsNull.test(sValue)) { return null; }
-           if (rIsBool.test(sValue)) { return sValue.toLowerCase() === 'true'; }
-           if (isFinite(sValue)) { return parseFloat(sValue); }
-           if (isFinite(Date.parse(sValue))) { return new Date(sValue); }
-           return sValue;
+         var i;
+         var joinAsMembers = true;
+
+         for (i = 0; i < toJoin.length; i++) {
+           if (toJoin[i] instanceof osmWay) {
+             joinAsMembers = false;
+             break;
+           }

          }
 
          }
 

-         function EmptyTree () { }
-         EmptyTree.prototype.toString = function () { return 'null'; };
-         EmptyTree.prototype.valueOf = function () { return null; };
+         var sequences = [];
+         sequences.actions = [];

 
 

-         function objectify (vValue) {
-           return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
-         }
+         while (toJoin.length) {
+           // start a new sequence
+           var item = toJoin.shift();
+           var currWays = [item];
+           var currNodes = resolve(item).slice(); // add to it

 
 

-         function createObjTree (oParentNode, nVerb, bFreeze, bNesteAttr) {
-           var
-             nLevelStart = aCache.length, bChildren = oParentNode.hasChildNodes(),
-             bAttributes = oParentNode.hasAttributes(), bHighVerb = Boolean(nVerb & 2);
+           while (toJoin.length) {
+             var start = currNodes[0];
+             var end = currNodes[currNodes.length - 1];
+             var fn = null;
+             var nodes = null; // Find the next way/member to join.
+
+             for (i = 0; i < toJoin.length; i++) {
+               item = toJoin[i];
+               nodes = resolve(item); // (for member ordering only, not way ordering - see #4872)
+               // Strongly prefer to generate a forward path that preserves the order
+               // of the members array. For multipolygons and most relations, member
+               // order does not matter - but for routes, it does. (see #4589)
+               // If we started this sequence backwards (i.e. next member way attaches to
+               // the start node and not the end node), reverse the initial way before continuing.
+
+               if (joinAsMembers && currWays.length === 1 && nodes[0] !== end && nodes[nodes.length - 1] !== end && (nodes[nodes.length - 1] === start || nodes[0] === start)) {
+                 currWays[0] = reverse(currWays[0]);
+                 currNodes.reverse();
+                 start = currNodes[0];
+                 end = currNodes[currNodes.length - 1];
+               }
+
+               if (nodes[0] === end) {
+                 fn = currNodes.push; // join to end
+
+                 nodes = nodes.slice(1);
+                 break;
+               } else if (nodes[nodes.length - 1] === end) {
+                 fn = currNodes.push; // join to end

 
 

-           var
-             sProp, vContent, nLength = 0, sCollectedTxt = '',
-             vResult = bHighVerb ? {} : /* put here the default value for empty nodes: */ true;
+                 nodes = nodes.slice(0, -1).reverse();
+                 item = reverse(item);
+                 break;
+               } else if (nodes[nodes.length - 1] === start) {
+                 fn = currNodes.unshift; // join to beginning

 
 

-           if (bChildren) {
-             for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
-               oNode = oParentNode.childNodes.item(nItem);
-               if (oNode.nodeType === 4) { sCollectedTxt += oNode.nodeValue; } /* nodeType is 'CDATASection' (4) */
-               else if (oNode.nodeType === 3) { sCollectedTxt += oNode.nodeValue.trim(); } /* nodeType is 'Text' (3) */
-               else if (oNode.nodeType === 1 && !oNode.prefix) { aCache.push(oNode); } /* nodeType is 'Element' (1) */
+                 nodes = nodes.slice(0, -1);
+                 break;
+               } else if (nodes[0] === start) {
+                 fn = currNodes.unshift; // join to beginning
+
+                 nodes = nodes.slice(1).reverse();
+                 item = reverse(item);
+                 break;
+               } else {
+                 fn = nodes = null;
+               }
+             }
+
+             if (!nodes) {
+               // couldn't find a joinable way/member
+               break;

              }
              }

+
+             fn.apply(currWays, [item]);
+             fn.apply(currNodes, nodes);
+             toJoin.splice(i, 1);

            }
 
            }
 

-           var nLevelEnd = aCache.length, vBuiltVal = parseText(sCollectedTxt);
+           currWays.nodes = currNodes;
+           sequences.push(currWays);
+         }

 
 

-           if (!bHighVerb && (bChildren || bAttributes)) { vResult = nVerb === 0 ? objectify(vBuiltVal) : {}; }
+         return sequences;
+       }

 
 

-           for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
-             sProp = aCache[nElId].nodeName.toLowerCase();
-             vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
-             if (vResult.hasOwnProperty(sProp)) {
-               if (vResult[sProp].constructor !== Array) { vResult[sProp] = [vResult[sProp]]; }
-               vResult[sProp].push(vContent);
-             } else {
-               vResult[sProp] = vContent;
-               nLength++;
+       function actionAddMember(relationId, member, memberIndex, insertPair) {
+         return function action(graph) {
+           var relation = graph.entity(relationId); // There are some special rules for Public Transport v2 routes.
+
+           var isPTv2 = /stop|platform/.test(member.role);
+
+           if ((isNaN(memberIndex) || insertPair) && member.type === 'way' && !isPTv2) {
+             // Try to perform sensible inserts based on how the ways join together
+             graph = addWayMember(relation, graph);
+           } else {
+             // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
+             // Stops and Platforms for PTv2 should be ordered first.
+             // hack: We do not currently have the ability to place them in the exactly correct order.
+             if (isPTv2 && isNaN(memberIndex)) {
+               memberIndex = 0;

              }
              }

+
+             graph = graph.replace(relation.addMember(member, memberIndex));

            }
 
            }
 

-           if (bAttributes) {
-             var
-               nAttrLen = oParentNode.attributes.length,
-               sAPrefix = bNesteAttr ? '' : sAttrPref, oAttrParent = bNesteAttr ? {} : vResult;
+           return graph;
+         }; // Add a way member into the relation "wherever it makes sense".
+         // In this situation we were not supplied a memberIndex.

 
 

-             for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
-               oAttrib = oParentNode.attributes.item(nAttrib);
-               oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
-             }
+         function addWayMember(relation, graph) {
+           var groups, tempWay, item, i, j, k; // remove PTv2 stops and platforms before doing anything.

 
 

-             if (bNesteAttr) {
-               if (bFreeze) { Object.freeze(oAttrParent); }
-               vResult[sAttributesProp] = oAttrParent;
-               nLength -= nAttrLen - 1;
+           var PTv2members = [];
+           var members = [];
+
+           for (i = 0; i < relation.members.length; i++) {
+             var m = relation.members[i];
+
+             if (/stop|platform/.test(m.role)) {
+               PTv2members.push(m);
+             } else {
+               members.push(m);

              }
            }
 
              }
            }
 

-           if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
-             vResult[sValueProp] = vBuiltVal;
-           } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
-             vResult = vBuiltVal;
+           relation = relation.update({
+             members: members
+           });
+
+           if (insertPair) {
+             // We're adding a member that must stay paired with an existing member.
+             // (This feature is used by `actionSplit`)
+             //
+             // This is tricky because the members may exist multiple times in the
+             // member list, and with different A-B/B-A ordering and different roles.
+             // (e.g. a bus route that loops out and back - #4589).
+             //
+             // Replace the existing member with a temporary way,
+             // so that `osmJoinWays` can treat the pair like a single way.
+             tempWay = osmWay({
+               id: 'wTemp',
+               nodes: insertPair.nodes
+             });
+             graph = graph.replace(tempWay);
+             var tempMember = {
+               id: tempWay.id,
+               type: 'way',
+               role: member.role
+             };
+             var tempRelation = relation.replaceMember({
+               id: insertPair.originalID
+             }, tempMember, true);
+             groups = utilArrayGroupBy(tempRelation.members, 'type');
+             groups.way = groups.way || [];
+           } else {
+             // Add the member anywhere, one time. Just push and let `osmJoinWays` decide where to put it.
+             groups = utilArrayGroupBy(relation.members, 'type');
+             groups.way = groups.way || [];
+             groups.way.push(member);

            }
 
            }
 

-           if (bFreeze && (bHighVerb || nLength > 0)) { Object.freeze(vResult); }
+           members = withIndex(groups.way);
+           var joined = osmJoinWays(members, graph); // `joined` might not contain all of the way members,
+           // But will contain only the completed (downloaded) members

 
 

-           aCache.length = nLevelStart;
+           for (i = 0; i < joined.length; i++) {
+             var segment = joined[i];
+             var nodes = segment.nodes.slice();
+             var startIndex = segment[0].index; // j = array index in `members` where this segment starts

 
 

-           return vResult;
-         }
+             for (j = 0; j < members.length; j++) {
+               if (members[j].index === startIndex) {
+                 break;
+               }
+             } // k = each member in segment

 
 

-         function loadObjTree (oXMLDoc, oParentEl, oParentObj) {
-           var vValue, oChild;

 
 

-           if (oParentObj instanceof String || oParentObj instanceof Number || oParentObj instanceof Boolean) {
-             oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toString())); /* verbosity level is 0 */
-           } else if (oParentObj.constructor === Date) {
-             oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toGMTString()));    
-           }
+             for (k = 0; k < segment.length; k++) {
+               item = segment[k];
+               var way = graph.entity(item.id); // If this is a paired item, generate members in correct order and role

 
 

-           for (var sName in oParentObj) {
-             vValue = oParentObj[sName];
-             if (isFinite(sName) || vValue instanceof Function) { continue; } /* verbosity level is 0 */
-             if (sName === sValueProp) {
-               if (vValue !== null && vValue !== true) { oParentEl.appendChild(oXMLDoc.createTextNode(vValue.constructor === Date ? vValue.toGMTString() : String(vValue))); }
-             } else if (sName === sAttributesProp) { /* verbosity level is 3 */
-               for (var sAttrib in vValue) { oParentEl.setAttribute(sAttrib, vValue[sAttrib]); }
-             } else if (sName.charAt(0) === sAttrPref) {
-               oParentEl.setAttribute(sName.slice(1), vValue);
-             } else if (vValue.constructor === Array) {
-               for (var nItem = 0; nItem < vValue.length; nItem++) {
-                 oChild = oXMLDoc.createElement(sName);
-                 loadObjTree(oXMLDoc, oChild, vValue[nItem]);
-                 oParentEl.appendChild(oChild);
-               }
-             } else {
-               oChild = oXMLDoc.createElement(sName);
-               if (vValue instanceof Object) {
-                 loadObjTree(oXMLDoc, oChild, vValue);
-               } else if (vValue !== null && vValue !== true) {
-                 oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
+               if (tempWay && item.id === tempWay.id) {
+                 if (nodes[0].id === insertPair.nodes[0]) {
+                   item.pair = [{
+                     id: insertPair.originalID,
+                     type: 'way',
+                     role: item.role
+                   }, {
+                     id: insertPair.insertedID,
+                     type: 'way',
+                     role: item.role
+                   }];
+                 } else {
+                   item.pair = [{
+                     id: insertPair.insertedID,
+                     type: 'way',
+                     role: item.role
+                   }, {
+                     id: insertPair.originalID,
+                     type: 'way',
+                     role: item.role
+                   }];
+                 }
+               } // reorder `members` if necessary
+
+
+               if (k > 0) {
+                 if (j + k >= members.length || item.index !== members[j + k].index) {
+                   moveMember(members, item.index, j + k);
+                 }

                }
                }

-               oParentEl.appendChild(oChild);
-            }
-          }
-         }

 
 

-         this.build = function (oXMLParent, nVerbosity /* optional */, bFreeze /* optional */, bNesteAttributes /* optional */) {
-           var _nVerb = arguments.length > 1 && typeof nVerbosity === 'number' ? nVerbosity & 3 : /* put here the default verbosity level: */ 1;
-           return createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);    
-         };
+               nodes.splice(0, way.nodes.length - 1);
+             }
+           }

 
 

-         this.unbuild = function (oObjTree) {    
-           var oNewDoc = document.implementation.createDocument('', '', null);
-           loadObjTree(oNewDoc, oNewDoc, oObjTree);
-           return oNewDoc;
-         };
+           if (tempWay) {
+             graph = graph.remove(tempWay);
+           } // Final pass: skip dead items, split pairs, remove index properties

 
 

-         this.stringify = function (oObjTree) {
-           return (new XMLSerializer()).serializeToString(JXON.unbuild(oObjTree));
-         };
-       })();

 
 

-       // var myObject = JXON.build(doc);
-       // we got our javascript object! try: alert(JSON.stringify(myObject));
+           var wayMembers = [];

 
 

-       // var newDoc = JXON.unbuild(myObject);
-       // we got our Document instance! try: alert((new XMLSerializer()).serializeToString(newDoc));
+           for (i = 0; i < members.length; i++) {
+             item = members[i];
+             if (item.index === -1) continue;

 
 

-       var tiler$5 = utilTiler();
-       var dispatch$6 = dispatch('apiStatusChange', 'authLoading', 'authDone', 'change', 'loading', 'loaded', 'loadedNotes');
-       var urlroot = 'https://www.openstreetmap.org';
-       var oauth = osmAuth({
-           url: urlroot,
-           oauth_consumer_key: '5A043yRSEugj4DJ5TljuapfnrflWDte8jTOcWLlT',
-           oauth_secret: 'aB3jKq1TRsCOUrfOIZ6oQMEDmv2ptV76PA54NGLL',
-           loading: authLoading,
-           done: authDone
-       });
+             if (item.pair) {
+               wayMembers.push(item.pair[0]);
+               wayMembers.push(item.pair[1]);
+             } else {
+               wayMembers.push(utilObjectOmit(item, ['index']));
+             }
+           } // Put stops and platforms first, then nodes, ways, relations
+           // This is recommended for Public Transport v2 routes:
+           // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes

 
 

-       var _blacklists = ['.*\.google(apis)?\..*/(vt|kh)[\?/].*([xyz]=.*){3}.*'];
-       var _tileCache = { toLoad: {}, loaded: {}, inflight: {}, seen: {}, rtree: new RBush() };
-       var _noteCache = { toLoad: {}, loaded: {}, inflight: {}, inflightPost: {}, note: {}, closed: {}, rtree: new RBush() };
-       var _userCache = { toLoad: {}, user: {} };
-       var _cachedApiStatus;
-       var _changeset = {};

 
 

-       var _deferred = new Set();
-       var _connectionID = 1;
-       var _tileZoom$3 = 16;
-       var _noteZoom = 12;
-       var _rateLimitError;
-       var _userChangesets;
-       var _userDetails;
-       var _off;
+           var newMembers = PTv2members.concat(groups.node || [], wayMembers, groups.relation || []);
+           return graph.replace(relation.update({
+             members: newMembers
+           })); // `moveMember()` changes the `members` array in place by splicing
+           // the item with `.index = findIndex` to where it belongs,
+           // and marking the old position as "dead" with `.index = -1`
+           //
+           // j=5, k=0                jk
+           // segment                 5 4 7 6
+           // members       0 1 2 3 4 5 6 7 8 9        keep 5 in j+k
+           //
+           // j=5, k=1                j k
+           // segment                 5 4 7 6
+           // members       0 1 2 3 4 5 6 7 8 9        move 4 to j+k
+           // members       0 1 2 3 x 5 4 6 7 8 9      moved
+           //
+           // j=5, k=2                j   k
+           // segment                 5 4 7 6
+           // members       0 1 2 3 x 5 4 6 7 8 9      move 7 to j+k
+           // members       0 1 2 3 x 5 4 7 6 x 8 9    moved
+           //
+           // j=5, k=3                j     k
+           // segment                 5 4 7 6
+           // members       0 1 2 3 x 5 4 7 6 x 8 9    keep 6 in j+k
+           //

 
 

-       // set a default but also load this from the API status
-       var _maxWayNodes = 2000;
+           function moveMember(arr, findIndex, toIndex) {
+             var i;

 
 

+             for (i = 0; i < arr.length; i++) {
+               if (arr[i].index === findIndex) {
+                 break;
+               }
+             }

 
 

-       function authLoading() {
-           dispatch$6.call('authLoading');
-       }
+             var item = Object.assign({}, arr[i]); // shallow copy

 
 

+             arr[i].index = -1; // mark as dead

 
 

-       function authDone() {
-           dispatch$6.call('authDone');
-       }
+             item.index = toIndex;
+             arr.splice(toIndex, 0, item);
+           } // This is the same as `Relation.indexedMembers`,
+           // Except we don't want to index all the members, only the ways

 
 
 
 

-       function abortRequest$5(controllerOrXHR) {
-           if (controllerOrXHR) {
-               controllerOrXHR.abort();
-           }
-       }
+           function withIndex(arr) {
+             var result = new Array(arr.length);

 
 

+             for (var i = 0; i < arr.length; i++) {
+               result[i] = Object.assign({}, arr[i]); // shallow copy

 
 

-       function hasInflightRequests(cache) {
-           return Object.keys(cache.inflight).length;
-       }
+               result[i].index = i;
+             }

 
 

+             return result;
+           }
+         }
+       }

 
 

-       function abortUnwantedRequests$3(cache, visibleTiles) {
-           Object.keys(cache.inflight).forEach(function(k) {
-               if (cache.toLoad[k]) { return; }
-               if (visibleTiles.find(function(tile) { return k === tile.id; })) { return; }
+       function actionAddMidpoint(midpoint, node) {
+         return function (graph) {
+           graph = graph.replace(node.move(midpoint.loc));
+           var parents = utilArrayIntersection(graph.parentWays(graph.entity(midpoint.edge[0])), graph.parentWays(graph.entity(midpoint.edge[1])));
+           parents.forEach(function (way) {
+             for (var i = 0; i < way.nodes.length - 1; i++) {
+               if (geoEdgeEqual([way.nodes[i], way.nodes[i + 1]], midpoint.edge)) {
+                 graph = graph.replace(graph.entity(way.id).addNode(node.id, i + 1)); // Add only one midpoint on doubled-back segments,
+                 // turning them into self-intersections.

 
 

-               abortRequest$5(cache.inflight[k]);
-               delete cache.inflight[k];
+                 return;
+               }
+             }

            });
            });

+           return graph;
+         };

        }
 
        }
 

+       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/AddNodeToWayAction.as
+       function actionAddVertex(wayId, nodeId, index) {
+         return function (graph) {
+           return graph.replace(graph.entity(wayId).addNode(nodeId, index));
+         };
+       }

 
 

-       function getLoc(attrs) {
-           var lon = attrs.lon && attrs.lon.value;
-           var lat = attrs.lat && attrs.lat.value;
-           return [parseFloat(lon), parseFloat(lat)];
+       function actionChangeMember(relationId, member, memberIndex) {
+         return function (graph) {
+           return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
+         };

        }
 
        }
 

+       function actionChangePreset(entityID, oldPreset, newPreset, skipFieldDefaults) {
+         return function action(graph) {
+           var entity = graph.entity(entityID);
+           var geometry = entity.geometry(graph);
+           var tags = entity.tags; // preserve tags that the new preset might care about, if any

 
 

-       function getNodes(obj) {
-           var elems = obj.getElementsByTagName('nd');
-           var nodes = new Array(elems.length);
-           for (var i = 0, l = elems.length; i < l; i++) {
-               nodes[i] = 'n' + elems[i].attributes.ref.value;
-           }
-           return nodes;
+           if (oldPreset) tags = oldPreset.unsetTags(tags, geometry, newPreset && newPreset.addTags ? Object.keys(newPreset.addTags) : null);
+           if (newPreset) tags = newPreset.setTags(tags, geometry, skipFieldDefaults);
+           return graph.replace(entity.update({
+             tags: tags
+           }));
+         };

        }
 
        }
 

-       function getNodesJSON(obj) {
-           var elems = obj.nodes;
-           var nodes = new Array(elems.length);
-           for (var i = 0, l = elems.length; i < l; i++) {
-               nodes[i] = 'n' + elems[i];
-           }
-           return nodes;
+       function actionChangeTags(entityId, tags) {
+         return function (graph) {
+           var entity = graph.entity(entityId);
+           return graph.replace(entity.update({
+             tags: tags
+           }));
+         };

        }
 
        }
 

-       function getTags(obj) {
-           var elems = obj.getElementsByTagName('tag');
-           var tags = {};
-           for (var i = 0, l = elems.length; i < l; i++) {
-               var attrs = elems[i].attributes;
-               tags[attrs.k.value] = attrs.v.value;
-           }
-
-           return tags;
+       function osmNode() {
+         if (!(this instanceof osmNode)) {
+           return new osmNode().initialize(arguments);
+         } else if (arguments.length) {
+           this.initialize(arguments);
+         }

        }
        }

+       osmEntity.node = osmNode;
+       osmNode.prototype = Object.create(osmEntity.prototype);
+       Object.assign(osmNode.prototype, {
+         type: 'node',
+         loc: [9999, 9999],
+         extent: function extent() {
+           return new geoExtent(this.loc);
+         },
+         geometry: function geometry(graph) {
+           return graph["transient"](this, 'geometry', function () {
+             return graph.isPoi(this) ? 'point' : 'vertex';
+           });
+         },
+         move: function move(loc) {
+           return this.update({
+             loc: loc
+           });
+         },
+         isDegenerate: function isDegenerate() {
+           return !(Array.isArray(this.loc) && this.loc.length === 2 && this.loc[0] >= -180 && this.loc[0] <= 180 && this.loc[1] >= -90 && this.loc[1] <= 90);
+         },
+         // Inspect tags and geometry to determine which direction(s) this node/vertex points
+         directions: function directions(resolver, projection) {
+           var val;
+           var i; // which tag to use?
+
+           if (this.isHighwayIntersection(resolver) && (this.tags.stop || '').toLowerCase() === 'all') {
+             // all-way stop tag on a highway intersection
+             val = 'all';
+           } else {
+             // generic direction tag
+             val = (this.tags.direction || '').toLowerCase(); // better suffix-style direction tag

 
 

+             var re = /:direction$/i;
+             var keys = Object.keys(this.tags);

 
 

-       function getMembers(obj) {
-           var elems = obj.getElementsByTagName('member');
-           var members = new Array(elems.length);
-           for (var i = 0, l = elems.length; i < l; i++) {
-               var attrs = elems[i].attributes;
-               members[i] = {
-                   id: attrs.type.value[0] + attrs.ref.value,
-                   type: attrs.type.value,
-                   role: attrs.role.value
-               };
+             for (i = 0; i < keys.length; i++) {
+               if (re.test(keys[i])) {
+                 val = this.tags[keys[i]].toLowerCase();
+                 break;
+               }
+             }

            }
            }

-           return members;
-       }

 
 

-       function getMembersJSON(obj) {
-           var elems = obj.members;
-           var members = new Array(elems.length);
-           for (var i = 0, l = elems.length; i < l; i++) {
-               var attrs = elems[i];
-               members[i] = {
-                   id: attrs.type[0] + attrs.ref,
-                   type: attrs.type,
-                   role: attrs.role
-               };
-           }
-           return members;
-       }
+           if (val === '') return [];
+           var cardinal = {
+             north: 0,
+             n: 0,
+             northnortheast: 22,
+             nne: 22,
+             northeast: 45,
+             ne: 45,
+             eastnortheast: 67,
+             ene: 67,
+             east: 90,
+             e: 90,
+             eastsoutheast: 112,
+             ese: 112,
+             southeast: 135,
+             se: 135,
+             southsoutheast: 157,
+             sse: 157,
+             south: 180,
+             s: 180,
+             southsouthwest: 202,
+             ssw: 202,
+             southwest: 225,
+             sw: 225,
+             westsouthwest: 247,
+             wsw: 247,
+             west: 270,
+             w: 270,
+             westnorthwest: 292,
+             wnw: 292,
+             northwest: 315,
+             nw: 315,
+             northnorthwest: 337,
+             nnw: 337
+           };
+           var values = val.split(';');
+           var results = [];
+           values.forEach(function (v) {
+             // swap cardinal for numeric directions
+             if (cardinal[v] !== undefined) {
+               v = cardinal[v];
+             } // numeric direction - just add to results

 
 

-       function getVisible(attrs) {
-           return (!attrs.visible || attrs.visible.value !== 'false');
-       }

 
 

+             if (v !== '' && !isNaN(+v)) {
+               results.push(+v);
+               return;
+             } // string direction - inspect parent ways

 
 

-       function parseComments(comments) {
-           var parsedComments = [];
-
-           // for each comment
-           for (var i = 0; i < comments.length; i++) {
-               var comment = comments[i];
-               if (comment.nodeName === 'comment') {
-                   var childNodes = comment.childNodes;
-                   var parsedComment = {};
-
-                   for (var j = 0; j < childNodes.length; j++) {
-                       var node = childNodes[j];
-                       var nodeName = node.nodeName;
-                       if (nodeName === '#text') { continue; }
-                       parsedComment[nodeName] = node.textContent;
-
-                       if (nodeName === 'uid') {
-                           var uid = node.textContent;
-                           if (uid && !_userCache.user[uid]) {
-                               _userCache.toLoad[uid] = true;
-                           }
-                       }
+
+             var lookBackward = this.tags['traffic_sign:backward'] || v === 'backward' || v === 'both' || v === 'all';
+             var lookForward = this.tags['traffic_sign:forward'] || v === 'forward' || v === 'both' || v === 'all';
+             if (!lookForward && !lookBackward) return;
+             var nodeIds = {};
+             resolver.parentWays(this).forEach(function (parent) {
+               var nodes = parent.nodes;
+
+               for (i = 0; i < nodes.length; i++) {
+                 if (nodes[i] === this.id) {
+                   // match current entity
+                   if (lookForward && i > 0) {
+                     nodeIds[nodes[i - 1]] = true; // look back to prev node

                    }
 
                    }
 

-                   if (parsedComment) {
-                       parsedComments.push(parsedComment);
+                   if (lookBackward && i < nodes.length - 1) {
+                     nodeIds[nodes[i + 1]] = true; // look ahead to next node

                    }
                    }

+                 }

                }
                }

-           }
-           return parsedComments;
-       }
+             }, this);
+             Object.keys(nodeIds).forEach(function (nodeId) {
+               // +90 because geoAngle returns angle from X axis, not Y (north)
+               results.push(geoAngle(this, resolver.entity(nodeId), projection) * (180 / Math.PI) + 90);
+             }, this);
+           }, this);
+           return utilArrayUniq(results);
+         },
+         isCrossing: function isCrossing() {
+           return this.tags.highway === 'crossing' || this.tags.railway && this.tags.railway.indexOf('crossing') !== -1;
+         },
+         isEndpoint: function isEndpoint(resolver) {
+           return resolver["transient"](this, 'isEndpoint', function () {
+             var id = this.id;
+             return resolver.parentWays(this).filter(function (parent) {
+               return !parent.isClosed() && !!parent.affix(id);
+             }).length > 0;
+           });
+         },
+         isConnected: function isConnected(resolver) {
+           return resolver["transient"](this, 'isConnected', function () {
+             var parents = resolver.parentWays(this);

 
 

+             if (parents.length > 1) {
+               // vertex is connected to multiple parent ways
+               for (var i in parents) {
+                 if (parents[i].geometry(resolver) === 'line' && parents[i].hasInterestingTags()) return true;
+               }
+             } else if (parents.length === 1) {
+               var way = parents[0];
+               var nodes = way.nodes.slice();

 
 

-       function encodeNoteRtree(note) {
-           return {
-               minX: note.loc[0],
-               minY: note.loc[1],
-               maxX: note.loc[0],
-               maxY: note.loc[1],
-               data: note
-           };
-       }
+               if (way.isClosed()) {
+                 nodes.pop();
+               } // ignore connecting node if closed
+               // return true if vertex appears multiple times (way is self intersecting)

 
 
 
 

-       var jsonparsers = {
+               return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
+             }

 
 

-           node: function nodeData(obj, uid) {
-               return new osmNode({
-                   id:  uid,
-                   visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-                   version: obj.version && obj.version.toString(),
-                   changeset: obj.changeset && obj.changeset.toString(),
-                   timestamp: obj.timestamp,
-                   user: obj.user,
-                   uid: obj.uid && obj.uid.toString(),
-                   loc: [parseFloat(obj.lon), parseFloat(obj.lat)],
-                   tags: obj.tags
-               });
-           },
+             return false;
+           });
+         },
+         parentIntersectionWays: function parentIntersectionWays(resolver) {
+           return resolver["transient"](this, 'parentIntersectionWays', function () {
+             return resolver.parentWays(this).filter(function (parent) {
+               return (parent.tags.highway || parent.tags.waterway || parent.tags.railway || parent.tags.aeroway) && parent.geometry(resolver) === 'line';
+             });
+           });
+         },
+         isIntersection: function isIntersection(resolver) {
+           return this.parentIntersectionWays(resolver).length > 1;
+         },
+         isHighwayIntersection: function isHighwayIntersection(resolver) {
+           return resolver["transient"](this, 'isHighwayIntersection', function () {
+             return resolver.parentWays(this).filter(function (parent) {
+               return parent.tags.highway && parent.geometry(resolver) === 'line';
+             }).length > 1;
+           });
+         },
+         isOnAddressLine: function isOnAddressLine(resolver) {
+           return resolver["transient"](this, 'isOnAddressLine', function () {
+             return resolver.parentWays(this).filter(function (parent) {
+               return parent.tags.hasOwnProperty('addr:interpolation') && parent.geometry(resolver) === 'line';
+             }).length > 0;
+           });
+         },
+         asJXON: function asJXON(changeset_id) {
+           var r = {
+             node: {
+               '@id': this.osmId(),
+               '@lon': this.loc[0],
+               '@lat': this.loc[1],
+               '@version': this.version || 0,
+               tag: Object.keys(this.tags).map(function (k) {
+                 return {
+                   keyAttributes: {
+                     k: k,
+                     v: this.tags[k]
+                   }
+                 };
+               }, this)
+             }
+           };
+           if (changeset_id) r.node['@changeset'] = changeset_id;
+           return r;
+         },
+         asGeoJSON: function asGeoJSON() {
+           return {
+             type: 'Point',
+             coordinates: this.loc
+           };
+         }
+       });

 
 

-           way: function wayData(obj, uid) {
-               return new osmWay({
-                   id:  uid,
-                   visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-                   version: obj.version && obj.version.toString(),
-                   changeset: obj.changeset && obj.changeset.toString(),
-                   timestamp: obj.timestamp,
-                   user: obj.user,
-                   uid: obj.uid && obj.uid.toString(),
-                   tags: obj.tags,
-                   nodes: getNodesJSON(obj)
-               });
-           },
+       function actionCircularize(wayId, projection, maxAngle) {
+         maxAngle = (maxAngle || 20) * Math.PI / 180;
+
+         var action = function action(graph, t) {
+           if (t === null || !isFinite(t)) t = 1;
+           t = Math.min(Math.max(+t, 0), 1);
+           var way = graph.entity(wayId);
+           var origNodes = {};
+           graph.childNodes(way).forEach(function (node) {
+             if (!origNodes[node.id]) origNodes[node.id] = node;
+           });

 
 

-           relation: function relationData(obj, uid) {
-               return new osmRelation({
-                   id:  uid,
-                   visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-                   version: obj.version && obj.version.toString(),
-                   changeset: obj.changeset && obj.changeset.toString(),
-                   timestamp: obj.timestamp,
-                   user: obj.user,
-                   uid: obj.uid && obj.uid.toString(),
-                   tags: obj.tags,
-                   members: getMembersJSON(obj)
-               });
+           if (!way.isConvex(graph)) {
+             graph = action.makeConvex(graph);

            }
            }

-       };

 
 

-       function parseJSON(payload, callback, options) {
-           options = Object.assign({ skipSeen: true }, options);
-           if (!payload)  {
-               return callback({ message: 'No JSON', status: -1 });
-           }
+           var nodes = utilArrayUniq(graph.childNodes(way));
+           var keyNodes = nodes.filter(function (n) {
+             return graph.parentWays(n).length !== 1;
+           });
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var keyPoints = keyNodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var centroid = points.length === 2 ? geoVecInterp(points[0], points[1], 0.5) : d3_polygonCentroid(points);
+           var radius = d3_median(points, function (p) {
+             return geoVecLength(centroid, p);
+           });
+           var sign = d3_polygonArea(points) > 0 ? 1 : -1;
+           var ids, i, j, k; // we need at least two key nodes for the algorithm to work
+
+           if (!keyNodes.length) {
+             keyNodes = [nodes[0]];
+             keyPoints = [points[0]];
+           }
+
+           if (keyNodes.length === 1) {
+             var index = nodes.indexOf(keyNodes[0]);
+             var oppositeIndex = Math.floor((index + nodes.length / 2) % nodes.length);
+             keyNodes.push(nodes[oppositeIndex]);
+             keyPoints.push(points[oppositeIndex]);
+           } // key points and nodes are those connected to the ways,
+           // they are projected onto the circle, in between nodes are moved
+           // to constant intervals between key nodes, extra in between nodes are
+           // added if necessary.
+
+
+           for (i = 0; i < keyPoints.length; i++) {
+             var nextKeyNodeIndex = (i + 1) % keyNodes.length;
+             var startNode = keyNodes[i];
+             var endNode = keyNodes[nextKeyNodeIndex];
+             var startNodeIndex = nodes.indexOf(startNode);
+             var endNodeIndex = nodes.indexOf(endNode);
+             var numberNewPoints = -1;
+             var indexRange = endNodeIndex - startNodeIndex;
+             var nearNodes = {};
+             var inBetweenNodes = [];
+             var startAngle, endAngle, totalAngle, eachAngle;
+             var angle, loc, node, origNode;
+
+             if (indexRange < 0) {
+               indexRange += nodes.length;
+             } // position this key node
+
+
+             var distance = geoVecLength(centroid, keyPoints[i]) || 1e-4;
+             keyPoints[i] = [centroid[0] + (keyPoints[i][0] - centroid[0]) / distance * radius, centroid[1] + (keyPoints[i][1] - centroid[1]) / distance * radius];
+             loc = projection.invert(keyPoints[i]);
+             node = keyNodes[i];
+             origNode = origNodes[node.id];
+             node = node.move(geoVecInterp(origNode.loc, loc, t));
+             graph = graph.replace(node); // figure out the between delta angle we want to match to
+
+             startAngle = Math.atan2(keyPoints[i][1] - centroid[1], keyPoints[i][0] - centroid[0]);
+             endAngle = Math.atan2(keyPoints[nextKeyNodeIndex][1] - centroid[1], keyPoints[nextKeyNodeIndex][0] - centroid[0]);
+             totalAngle = endAngle - startAngle; // detects looping around -pi/pi
+
+             if (totalAngle * sign > 0) {
+               totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
+             }

 
 

-           var json = payload;
-           if (typeof json !== 'object')
-              { json = JSON.parse(payload); }
+             do {
+               numberNewPoints++;
+               eachAngle = totalAngle / (indexRange + numberNewPoints);
+             } while (Math.abs(eachAngle) > maxAngle); // move existing nodes

 
 

-           if (!json.elements)
-               { return callback({ message: 'No JSON', status: -1 }); }

 
 

-           var children = json.elements;
+             for (j = 1; j < indexRange; j++) {
+               angle = startAngle + j * eachAngle;
+               loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]);
+               node = nodes[(j + startNodeIndex) % nodes.length];
+               origNode = origNodes[node.id];
+               nearNodes[node.id] = angle;
+               node = node.move(geoVecInterp(origNode.loc, loc, t));
+               graph = graph.replace(node);
+             } // add new in between nodes if necessary

 
 

-           var handle = window.requestIdleCallback(function() {
-               var results = [];
-               var result;
-               for (var i = 0; i < children.length; i++) {
-                   result = parseChild(children[i]);
-                   if (result) { results.push(result); }
-               }
-               callback(null, results);
-           });

 
 

-           _deferred.add(handle);
+             for (j = 0; j < numberNewPoints; j++) {
+               angle = startAngle + (indexRange + j) * eachAngle;
+               loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]); // choose a nearnode to use as the original

 
 

-           function parseChild(child) {
-               var parser = jsonparsers[child.type];
-               if (!parser) { return null; }
+               var min = Infinity;

 
 

-               var uid;
+               for (var nodeId in nearNodes) {
+                 var nearAngle = nearNodes[nodeId];
+                 var dist = Math.abs(nearAngle - angle);

 
 

-               uid = osmEntity.id.fromOSM(child.type, child.id);
-               if (options.skipSeen) {
-                   if (_tileCache.seen[uid]) { return null; }  // avoid reparsing a "seen" entity
-                   _tileCache.seen[uid] = true;
+                 if (dist < min) {
+                   min = dist;
+                   origNode = origNodes[nodeId];
+                 }

                }
 
                }
 

-               return parser(child, uid);
-           }
-       }
-
-       var parsers = {
-           node: function nodeData(obj, uid) {
-               var attrs = obj.attributes;
-               return new osmNode({
-                   id: uid,
-                   visible: getVisible(attrs),
-                   version: attrs.version.value,
-                   changeset: attrs.changeset && attrs.changeset.value,
-                   timestamp: attrs.timestamp && attrs.timestamp.value,
-                   user: attrs.user && attrs.user.value,
-                   uid: attrs.uid && attrs.uid.value,
-                   loc: getLoc(attrs),
-                   tags: getTags(obj)
+               node = osmNode({
+                 loc: geoVecInterp(origNode.loc, loc, t)

                });
                });

-           },
+               graph = graph.replace(node);
+               nodes.splice(endNodeIndex + j, 0, node);
+               inBetweenNodes.push(node.id);
+             } // Check for other ways that share these keyNodes..
+             // If keyNodes are adjacent in both ways,
+             // we can add inBetweenNodes to that shared way too..

 
 

-           way: function wayData(obj, uid) {
-               var attrs = obj.attributes;
-               return new osmWay({
-                   id: uid,
-                   visible: getVisible(attrs),
-                   version: attrs.version.value,
-                   changeset: attrs.changeset && attrs.changeset.value,
-                   timestamp: attrs.timestamp && attrs.timestamp.value,
-                   user: attrs.user && attrs.user.value,
-                   uid: attrs.uid && attrs.uid.value,
-                   tags: getTags(obj),
-                   nodes: getNodes(obj),
-               });
-           },

 
 

-           relation: function relationData(obj, uid) {
-               var attrs = obj.attributes;
-               return new osmRelation({
-                   id: uid,
-                   visible: getVisible(attrs),
-                   version: attrs.version.value,
-                   changeset: attrs.changeset && attrs.changeset.value,
-                   timestamp: attrs.timestamp && attrs.timestamp.value,
-                   user: attrs.user && attrs.user.value,
-                   uid: attrs.uid && attrs.uid.value,
-                   tags: getTags(obj),
-                   members: getMembers(obj)
-               });
-           },
+             if (indexRange === 1 && inBetweenNodes.length) {
+               var startIndex1 = way.nodes.lastIndexOf(startNode.id);
+               var endIndex1 = way.nodes.lastIndexOf(endNode.id);
+               var wayDirection1 = endIndex1 - startIndex1;
+
+               if (wayDirection1 < -1) {
+                 wayDirection1 = 1;
+               }

 
 

-           note: function parseNote(obj, uid) {
-               var attrs = obj.attributes;
-               var childNodes = obj.childNodes;
-               var props = {};
+               var parentWays = graph.parentWays(keyNodes[i]);

 
 

-               props.id = uid;
-               props.loc = getLoc(attrs);
+               for (j = 0; j < parentWays.length; j++) {
+                 var sharedWay = parentWays[j];
+                 if (sharedWay === way) continue;

 
 

-               // if notes are coincident, move them apart slightly
-               var coincident = false;
-               var epsilon = 0.00001;
-               do {
-                   if (coincident) {
-                       props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
+                 if (sharedWay.areAdjacent(startNode.id, endNode.id)) {
+                   var startIndex2 = sharedWay.nodes.lastIndexOf(startNode.id);
+                   var endIndex2 = sharedWay.nodes.lastIndexOf(endNode.id);
+                   var wayDirection2 = endIndex2 - startIndex2;
+                   var insertAt = endIndex2;
+
+                   if (wayDirection2 < -1) {
+                     wayDirection2 = 1;

                    }
                    }

-                   var bbox = geoExtent(props.loc).bbox();
-                   coincident = _noteCache.rtree.search(bbox).length;
-               } while (coincident);
-
-               // parse note contents
-               for (var i = 0; i < childNodes.length; i++) {
-                   var node = childNodes[i];
-                   var nodeName = node.nodeName;
-                   if (nodeName === '#text') { continue; }
-
-                   // if the element is comments, parse the comments
-                   if (nodeName === 'comments') {
-                       props[nodeName] = parseComments(node.childNodes);
-                   } else {
-                       props[nodeName] = node.textContent;
+
+                   if (wayDirection1 !== wayDirection2) {
+                     inBetweenNodes.reverse();
+                     insertAt = startIndex2;
+                   }
+
+                   for (k = 0; k < inBetweenNodes.length; k++) {
+                     sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);

                    }
                    }

+
+                   graph = graph.replace(sharedWay);
+                 }

                }
                }

+             }
+           } // update the way to have all the new nodes

 
 

-               var note = new osmNote(props);
-               var item = encodeNoteRtree(note);
-               _noteCache.note[note.id] = note;
-               _noteCache.rtree.insert(item);

 
 

-               return note;
-           },
+           ids = nodes.map(function (n) {
+             return n.id;
+           });
+           ids.push(ids[0]);
+           way = way.update({
+             nodes: ids
+           });
+           graph = graph.replace(way);
+           return graph;
+         };

 
 

-           user: function parseUser(obj, uid) {
-               var attrs = obj.attributes;
-               var user = {
-                   id: uid,
-                   display_name: attrs.display_name && attrs.display_name.value,
-                   account_created: attrs.account_created && attrs.account_created.value,
-                   changesets_count: '0',
-                   active_blocks: '0'
-               };
+         action.makeConvex = function (graph) {
+           var way = graph.entity(wayId);
+           var nodes = utilArrayUniq(graph.childNodes(way));
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var sign = d3_polygonArea(points) > 0 ? 1 : -1;
+           var hull = d3_polygonHull(points);
+           var i, j; // D3 convex hulls go counterclockwise..

 
 

-               var img = obj.getElementsByTagName('img');
-               if (img && img[0] && img[0].getAttribute('href')) {
-                   user.image_url = img[0].getAttribute('href');
-               }
+           if (sign === -1) {
+             nodes.reverse();
+             points.reverse();
+           }

 
 

-               var changesets = obj.getElementsByTagName('changesets');
-               if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
-                   user.changesets_count = changesets[0].getAttribute('count');
-               }
+           for (i = 0; i < hull.length - 1; i++) {
+             var startIndex = points.indexOf(hull[i]);
+             var endIndex = points.indexOf(hull[i + 1]);
+             var indexRange = endIndex - startIndex;

 
 

-               var blocks = obj.getElementsByTagName('blocks');
-               if (blocks && blocks[0]) {
-                   var received = blocks[0].getElementsByTagName('received');
-                   if (received && received[0] && received[0].getAttribute('active')) {
-                       user.active_blocks = received[0].getAttribute('active');
-                   }
-               }
+             if (indexRange < 0) {
+               indexRange += nodes.length;
+             } // move interior nodes to the surface of the convex hull..

 
 

-               _userCache.user[uid] = user;
-               delete _userCache.toLoad[uid];
-               return user;
+
+             for (j = 1; j < indexRange; j++) {
+               var point = geoVecInterp(hull[i], hull[i + 1], j / indexRange);
+               var node = nodes[(j + startIndex) % nodes.length].move(projection.invert(point));
+               graph = graph.replace(node);
+             }

            }
            }

-       };

 
 

+           return graph;
+         };

 
 

-       function parseXML(xml, callback, options) {
-           options = Object.assign({ skipSeen: true }, options);
-           if (!xml || !xml.childNodes) {
-               return callback({ message: 'No XML', status: -1 });
-           }
+         action.disabled = function (graph) {
+           if (!graph.entity(wayId).isClosed()) {
+             return 'not_closed';
+           } //disable when already circular

 
 

-           var root = xml.childNodes[0];
-           var children = root.childNodes;

 
 

-           var handle = window.requestIdleCallback(function() {
-               var results = [];
-               var result;
-               for (var i = 0; i < children.length; i++) {
-                   result = parseChild(children[i]);
-                   if (result) { results.push(result); }
-               }
-               callback(null, results);
+           var way = graph.entity(wayId);
+           var nodes = utilArrayUniq(graph.childNodes(way));
+           var points = nodes.map(function (n) {
+             return projection(n.loc);

            });
            });

+           var hull = d3_polygonHull(points);
+           var epsilonAngle = Math.PI / 180;

 
 

-           _deferred.add(handle);
-
+           if (hull.length !== points.length || hull.length < 3) {
+             return false;
+           }

 
 

-           function parseChild(child) {
-               var parser = parsers[child.nodeName];
-               if (!parser) { return null; }
+           var centroid = d3_polygonCentroid(points);
+           var radius = geoVecLengthSquare(centroid, points[0]);
+           var i, actualPoint; // compare distances between centroid and points

 
 

-               var uid;
-               if (child.nodeName === 'user') {
-                   uid = child.attributes.id.value;
-                   if (options.skipSeen && _userCache.user[uid]) {
-                       delete _userCache.toLoad[uid];
-                       return null;
-                   }
+           for (i = 0; i < hull.length; i++) {
+             actualPoint = hull[i];
+             var actualDist = geoVecLengthSquare(actualPoint, centroid);
+             var diff = Math.abs(actualDist - radius); //compare distances with epsilon-error (5%)

 
 

-               } else if (child.nodeName === 'note') {
-                   uid = child.getElementsByTagName('id')[0].textContent;
+             if (diff > 0.05 * radius) {
+               return false;
+             }
+           } //check if central angles are smaller than maxAngle

 
 

-               } else {
-                   uid = osmEntity.id.fromOSM(child.nodeName, child.attributes.id.value);
-                   if (options.skipSeen) {
-                       if (_tileCache.seen[uid]) { return null; }  // avoid reparsing a "seen" entity
-                       _tileCache.seen[uid] = true;
-                   }
-               }

 
 

-               return parser(child, uid);
-           }
-       }
+           for (i = 0; i < hull.length; i++) {
+             actualPoint = hull[i];
+             var nextPoint = hull[(i + 1) % hull.length];
+             var startAngle = Math.atan2(actualPoint[1] - centroid[1], actualPoint[0] - centroid[0]);
+             var endAngle = Math.atan2(nextPoint[1] - centroid[1], nextPoint[0] - centroid[0]);
+             var angle = endAngle - startAngle;

 
 

+             if (angle < 0) {
+               angle = -angle;
+             }

 
 

-       // replace or remove note from rtree
-       function updateRtree$3(item, replace) {
-           _noteCache.rtree.remove(item, function isEql(a, b) { return a.data.id === b.data.id; });
+             if (angle > Math.PI) {
+               angle = 2 * Math.PI - angle;
+             }

 
 

-           if (replace) {
-               _noteCache.rtree.insert(item);
+             if (angle > maxAngle + epsilonAngle) {
+               return false;
+             }

            }
            }

+
+           return 'already_circular';
+         };
+
+         action.transitionable = true;
+         return action;

        }
 
        }
 

+       function actionDeleteWay(wayID) {
+         function canDeleteNode(node, graph) {
+           // don't delete nodes still attached to ways or relations
+           if (graph.parentWays(node).length || graph.parentRelations(node).length) return false;
+           var geometries = osmNodeGeometriesForTags(node.tags); // don't delete if this node can be a standalone point

 
 

-       function wrapcb(thisArg, callback, cid) {
-           return function(err, result) {
-               if (err) {
-                   // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
-                   if (err.status === 400 || err.status === 401 || err.status === 403) {
-                       thisArg.logout();
-                   }
-                   return callback.call(thisArg, err);
+           if (geometries.point) return false; // delete if this node only be a vertex

 
 

-               } else if (thisArg.getConnectionId() !== cid) {
-                   return callback.call(thisArg, { message: 'Connection Switched', status: -1 });
+           if (geometries.vertex) return true; // iD doesn't know if this should be a point or vertex,
+           // so only delete if there are no interesting tags

 
 

-               } else {
-                   return callback.call(thisArg, err, result);
-               }
-           };
-       }
+           return !node.hasInterestingTags();
+         }

 
 

+         var action = function action(graph) {
+           var way = graph.entity(wayID);
+           graph.parentRelations(way).forEach(function (parent) {
+             parent = parent.removeMembersWithID(wayID);
+             graph = graph.replace(parent);

 
 

-       var serviceOsm = {
+             if (parent.isDegenerate()) {
+               graph = actionDeleteRelation(parent.id)(graph);
+             }
+           });
+           new Set(way.nodes).forEach(function (nodeID) {
+             graph = graph.replace(way.removeNode(nodeID));
+             var node = graph.entity(nodeID);

 
 

-           init: function() {
-               utilRebind(this, dispatch$6, 'on');
-           },
+             if (canDeleteNode(node, graph)) {
+               graph = graph.remove(node);
+             }
+           });
+           return graph.remove(way);
+         };
+
+         return action;
+       }

 
 

+       function actionDeleteMultiple(ids) {
+         var actions = {
+           way: actionDeleteWay,
+           node: actionDeleteNode,
+           relation: actionDeleteRelation
+         };

 
 

-           reset: function() {
-               Array.from(_deferred).forEach(function(handle) {
-                   window.cancelIdleCallback(handle);
-                   _deferred.delete(handle);
-               });
+         var action = function action(graph) {
+           ids.forEach(function (id) {
+             if (graph.hasEntity(id)) {
+               // It may have been deleted already.
+               graph = actions[graph.entity(id).type](id)(graph);
+             }
+           });
+           return graph;
+         };

 
 

-               _connectionID++;
-               _userChangesets = undefined;
-               _userDetails = undefined;
-               _rateLimitError = undefined;
+         return action;
+       }

 
 

-               Object.values(_tileCache.inflight).forEach(abortRequest$5);
-               Object.values(_noteCache.inflight).forEach(abortRequest$5);
-               Object.values(_noteCache.inflightPost).forEach(abortRequest$5);
-               if (_changeset.inflight) { abortRequest$5(_changeset.inflight); }
+       function actionDeleteRelation(relationID, allowUntaggedMembers) {
+         function canDeleteEntity(entity, graph) {
+           return !graph.parentWays(entity).length && !graph.parentRelations(entity).length && !entity.hasInterestingTags() && !allowUntaggedMembers;
+         }

 
 

-               _tileCache = { toLoad: {}, loaded: {}, inflight: {}, seen: {}, rtree: new RBush() };
-               _noteCache = { toLoad: {}, loaded: {}, inflight: {}, inflightPost: {}, note: {}, closed: {}, rtree: new RBush() };
-               _userCache = { toLoad: {}, user: {} };
-               _cachedApiStatus = undefined;
-               _changeset = {};
+         var action = function action(graph) {
+           var relation = graph.entity(relationID);
+           graph.parentRelations(relation).forEach(function (parent) {
+             parent = parent.removeMembersWithID(relationID);
+             graph = graph.replace(parent);

 
 

-               return this;
-           },
+             if (parent.isDegenerate()) {
+               graph = actionDeleteRelation(parent.id)(graph);
+             }
+           });
+           var memberIDs = utilArrayUniq(relation.members.map(function (m) {
+             return m.id;
+           }));
+           memberIDs.forEach(function (memberID) {
+             graph = graph.replace(relation.removeMembersWithID(memberID));
+             var entity = graph.entity(memberID);
+
+             if (canDeleteEntity(entity, graph)) {
+               graph = actionDeleteMultiple([memberID])(graph);
+             }
+           });
+           return graph.remove(relation);
+         };

 
 

+         return action;
+       }

 
 

-           getConnectionId: function() {
-               return _connectionID;
-           },
+       function actionDeleteNode(nodeId) {
+         var action = function action(graph) {
+           var node = graph.entity(nodeId);
+           graph.parentWays(node).forEach(function (parent) {
+             parent = parent.removeNode(nodeId);
+             graph = graph.replace(parent);
+
+             if (parent.isDegenerate()) {
+               graph = actionDeleteWay(parent.id)(graph);
+             }
+           });
+           graph.parentRelations(node).forEach(function (parent) {
+             parent = parent.removeMembersWithID(nodeId);
+             graph = graph.replace(parent);

 
 

+             if (parent.isDegenerate()) {
+               graph = actionDeleteRelation(parent.id)(graph);
+             }
+           });
+           return graph.remove(node);
+         };

 
 

-           changesetURL: function(changesetID) {
-               return urlroot + '/changeset/' + changesetID;
-           },
+         return action;
+       }

 
 

+       //
+       // First choose a node to be the survivor, with preference given
+       // to an existing (not new) node.
+       //
+       // Tags and relation memberships of of non-surviving nodes are merged
+       // to the survivor.
+       //
+       // This is the inverse of `iD.actionDisconnect`.
+       //
+       // Reference:
+       //   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeNodesAction.as
+       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/MergeNodesAction.java
+       //

 
 

-           changesetsURL: function(center, zoom) {
-               var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
-               return urlroot + '/history#map=' +
-                   Math.floor(zoom) + '/' +
-                   center[1].toFixed(precision) + '/' +
-                   center[0].toFixed(precision);
-           },
+       function actionConnect(nodeIDs) {
+         var action = function action(graph) {
+           var survivor;
+           var node;
+           var parents;
+           var i, j; // Choose a survivor node, prefer an existing (not new) node - #4974

 
 

+           for (i = 0; i < nodeIDs.length; i++) {
+             survivor = graph.entity(nodeIDs[i]);
+             if (survivor.version) break; // found one
+           } // Replace all non-surviving nodes with the survivor and merge tags.

 
 

-           entityURL: function(entity) {
-               return urlroot + '/' + entity.type + '/' + entity.osmId();
-           },

 
 

+           for (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
+             if (node.id === survivor.id) continue;
+             parents = graph.parentWays(node);

 
 

-           historyURL: function(entity) {
-               return urlroot + '/' + entity.type + '/' + entity.osmId() + '/history';
-           },
+             for (j = 0; j < parents.length; j++) {
+               graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
+             }

 
 

+             parents = graph.parentRelations(node);

 
 

-           userURL: function(username) {
-               return urlroot + '/user/' + username;
-           },
+             for (j = 0; j < parents.length; j++) {
+               graph = graph.replace(parents[j].replaceMember(node, survivor));
+             }

 
 

+             survivor = survivor.mergeTags(node.tags);
+             graph = actionDeleteNode(node.id)(graph);
+           }

 
 

-           noteURL: function(note) {
-               return urlroot + '/note/' + note.id;
-           },
+           graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices

 
 

+           parents = graph.parentWays(survivor);

 
 

-           noteReportURL: function(note) {
-               return urlroot + '/reports/new?reportable_type=Note&reportable_id=' + note.id;
-           },
+           for (i = 0; i < parents.length; i++) {
+             if (parents[i].isDegenerate()) {
+               graph = actionDeleteWay(parents[i].id)(graph);
+             }
+           }

 
 

+           return graph;
+         };

 
 

-           // Generic method to load data from the OSM API
-           // Can handle either auth or unauth calls.
-           loadFromAPI: function(path, callback, options) {
-               options = Object.assign({ skipSeen: true }, options);
-               var that = this;
-               var cid = _connectionID;
+         action.disabled = function (graph) {
+           var seen = {};
+           var restrictionIDs = [];
+           var survivor;
+           var node, way;
+           var relations, relation, role;
+           var i, j, k; // Choose a survivor node, prefer an existing (not new) node - #4974

 
 

-               function done(err, payload) {
-                   if (that.getConnectionId() !== cid) {
-                       if (callback) { callback({ message: 'Connection Switched', status: -1 }); }
-                       return;
-                   }
+           for (i = 0; i < nodeIDs.length; i++) {
+             survivor = graph.entity(nodeIDs[i]);
+             if (survivor.version) break; // found one
+           } // 1. disable if the nodes being connected have conflicting relation roles

 
 

-                   var isAuthenticated = that.authenticated();

 
 

-                   // 400 Bad Request, 401 Unauthorized, 403 Forbidden
-                   // Logout and retry the request..
-                   if (isAuthenticated && err && err.status &&
-                           (err.status === 400 || err.status === 401 || err.status === 403)) {
-                       that.logout();
-                       that.loadFromAPI(path, callback, options);
+           for (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
+             relations = graph.parentRelations(node);

 
 

-                   // else, no retry..
-                   } else {
-                       // 509 Bandwidth Limit Exceeded, 429 Too Many Requests
-                       // Set the rateLimitError flag and trigger a warning..
-                       if (!isAuthenticated && !_rateLimitError && err && err.status &&
-                               (err.status === 509 || err.status === 429)) {
-                           _rateLimitError = err;
-                           dispatch$6.call('change');
-                           that.reloadApiStatus();
-
-                       } else if ((err && _cachedApiStatus === 'online') ||
-                           (!err && _cachedApiStatus !== 'online')) {
-                           // If the response's error state doesn't match the status,
-                           // it's likely we lost or gained the connection so reload the status
-                           that.reloadApiStatus();
-                       }
+             for (j = 0; j < relations.length; j++) {
+               relation = relations[j];
+               role = relation.memberById(node.id).role || ''; // if this node is a via node in a restriction, remember for later

 
 

-                       if (callback) {
-                           if (err) {
-                               return callback(err);
-                           } else {
-                               if (path.indexOf('.json') !== -1) {
-                                   return parseJSON(payload, callback, options);
-                               } else {
-                                   return parseXML(payload, callback, options);
-                               }
-                           }
-                       }
-                   }
+               if (relation.hasFromViaTo()) {
+                 restrictionIDs.push(relation.id);

                }
 
                }
 

-               if (this.authenticated()) {
-                   return oauth.xhr({ method: 'GET', path: path }, done);
+               if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
+                 return 'relation';

                } else {
                } else {

-                   var url = urlroot + path;
-                   var controller = new AbortController();
-                   d3_json(url, { signal: controller.signal })
-                       .then(function(data) {
-                           done(null, data);
-                       })
-                       .catch(function(err) {
-                           if (err.name === 'AbortError') { return; }
-                           // d3-fetch includes status in the error message,
-                           // but we can't access the response itself
-                           // https://github.com/d3/d3-fetch/issues/27
-                           var match = err.message.match(/^\d{3}/);
-                           if (match) {
-                               done({ status: +match[0], statusText: err.message });
-                           } else {
-                               done(err.message);
-                           }
-                       });
-                   return controller;
+                 seen[relation.id] = role;

                }
                }

-           },
-
+             }
+           } // gather restrictions for parent ways

 
 

-           // Load a single entity by id (ways and relations use the `/full` call)
-           // GET /api/0.6/node/#id
-           // GET /api/0.6/[way|relation]/#id/full
-           loadEntity: function(id, callback) {
-               var type = osmEntity.id.type(id);
-               var osmID = osmEntity.id.toOSM(id);
-               var options = { skipSeen: false };

 
 

-               this.loadFromAPI(
-                   '/api/0.6/' + type + '/' + osmID + (type !== 'node' ? '/full' : '') + '.json',
-                   function(err, entities) {
-                       if (callback) { callback(err, { data: entities }); }
-                   },
-                   options
-               );
-           },
+           for (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
+             var parents = graph.parentWays(node);

 
 

+             for (j = 0; j < parents.length; j++) {
+               var parent = parents[j];
+               relations = graph.parentRelations(parent);

 
 

-           // Load a single entity with a specific version
-           // GET /api/0.6/[node|way|relation]/#id/#version
-           loadEntityVersion: function(id, version, callback) {
-               var type = osmEntity.id.type(id);
-               var osmID = osmEntity.id.toOSM(id);
-               var options = { skipSeen: false };
+               for (k = 0; k < relations.length; k++) {
+                 relation = relations[k];

 
 

-               this.loadFromAPI(
-                   '/api/0.6/' + type + '/' + osmID + '/' + version + '.json',
-                   function(err, entities) {
-                       if (callback) { callback(err, { data: entities }); }
-                   },
-                   options
-               );
-           },
+                 if (relation.hasFromViaTo()) {
+                   restrictionIDs.push(relation.id);
+                 }
+               }
+             }
+           } // test restrictions

 
 
 
 

-           // Load multiple entities in chunks
-           // (note: callback may be called multiple times)
-           // Unlike `loadEntity`, child nodes and members are not fetched
-           // GET /api/0.6/[nodes|ways|relations]?#parameters
-           loadMultiple: function(ids, callback) {
-               var that = this;
-               var groups = utilArrayGroupBy(utilArrayUniq(ids), osmEntity.id.type);
-
-               Object.keys(groups).forEach(function(k) {
-                   var type = k + 's';   // nodes, ways, relations
-                   var osmIDs = groups[k].map(function(id) { return osmEntity.id.toOSM(id); });
-                   var options = { skipSeen: false };
-
-                   utilArrayChunk(osmIDs, 150).forEach(function(arr) {
-                       that.loadFromAPI(
-                           '/api/0.6/' + type + '.json?' + type + '=' + arr.join(),
-                           function(err, entities) {
-                               if (callback) { callback(err, { data: entities }); }
-                           },
-                           options
-                       );
-                   });
-               });
-           },
+           restrictionIDs = utilArrayUniq(restrictionIDs);

 
 

+           for (i = 0; i < restrictionIDs.length; i++) {
+             relation = graph.entity(restrictionIDs[i]);
+             if (!relation.isComplete(graph)) continue;
+             var memberWays = relation.members.filter(function (m) {
+               return m.type === 'way';
+             }).map(function (m) {
+               return graph.entity(m.id);
+             });
+             memberWays = utilArrayUniq(memberWays);
+             var f = relation.memberByRole('from');
+             var t = relation.memberByRole('to');
+             var isUturn = f.id === t.id; // 2a. disable if connection would damage a restriction
+             // (a key node is a node at the junction of ways)
+
+             var nodes = {
+               from: [],
+               via: [],
+               to: [],
+               keyfrom: [],
+               keyto: []
+             };

 
 

-           // Create, upload, and close a changeset
-           // PUT /api/0.6/changeset/create
-           // POST /api/0.6/changeset/#id/upload
-           // PUT /api/0.6/changeset/#id/close
-           putChangeset: function(changeset, changes, callback) {
-               var cid = _connectionID;
+             for (j = 0; j < relation.members.length; j++) {
+               collectNodes(relation.members[j], nodes);
+             }

 
 

-               if (_changeset.inflight) {
-                   return callback({ message: 'Changeset already inflight', status: -2 }, changeset);
+             nodes.keyfrom = utilArrayUniq(nodes.keyfrom.filter(hasDuplicates));
+             nodes.keyto = utilArrayUniq(nodes.keyto.filter(hasDuplicates));
+             var filter = keyNodeFilter(nodes.keyfrom, nodes.keyto);
+             nodes.from = nodes.from.filter(filter);
+             nodes.via = nodes.via.filter(filter);
+             nodes.to = nodes.to.filter(filter);
+             var connectFrom = false;
+             var connectVia = false;
+             var connectTo = false;
+             var connectKeyFrom = false;
+             var connectKeyTo = false;

 
 

-               } else if (_changeset.open) {   // reuse existing open changeset..
-                   return createdChangeset.call(this, null, _changeset.open);
+             for (j = 0; j < nodeIDs.length; j++) {
+               var n = nodeIDs[j];

 
 

-               } else {   // Open a new changeset..
-                   var options = {
-                       method: 'PUT',
-                       path: '/api/0.6/changeset/create',
-                       options: { header: { 'Content-Type': 'text/xml' } },
-                       content: JXON.stringify(changeset.asJXON())
-                   };
-                   _changeset.inflight = oauth.xhr(
-                       options,
-                       wrapcb(this, createdChangeset, cid)
-                   );
+               if (nodes.from.indexOf(n) !== -1) {
+                 connectFrom = true;

                }
 
                }
 

+               if (nodes.via.indexOf(n) !== -1) {
+                 connectVia = true;
+               }

 
 

-               function createdChangeset(err, changesetID) {
-                   _changeset.inflight = null;
-                   if (err) { return callback(err, changeset); }
+               if (nodes.to.indexOf(n) !== -1) {
+                 connectTo = true;
+               }

 
 

-                   _changeset.open = changesetID;
-                   changeset = changeset.update({ id: changesetID });
+               if (nodes.keyfrom.indexOf(n) !== -1) {
+                 connectKeyFrom = true;
+               }

 
 

-                   // Upload the changeset..
-                   var options = {
-                       method: 'POST',
-                       path: '/api/0.6/changeset/' + changesetID + '/upload',
-                       options: { header: { 'Content-Type': 'text/xml' } },
-                       content: JXON.stringify(changeset.osmChangeJXON(changes))
-                   };
-                   _changeset.inflight = oauth.xhr(
-                       options,
-                       wrapcb(this, uploadedChangeset, cid)
-                   );
-               }
-
-
-               function uploadedChangeset(err) {
-                   _changeset.inflight = null;
-                   if (err) { return callback(err, changeset); }
-
-                   // Upload was successful, safe to call the callback.
-                   // Add delay to allow for postgres replication #1646 #2678
-                   window.setTimeout(function() { callback(null, changeset); }, 2500);
-                   _changeset.open = null;
-
-                   // At this point, we don't really care if the connection was switched..
-                   // Only try to close the changeset if we're still talking to the same server.
-                   if (this.getConnectionId() === cid) {
-                       // Still attempt to close changeset, but ignore response because #2667
-                       oauth.xhr({
-                           method: 'PUT',
-                           path: '/api/0.6/changeset/' + changeset.id + '/close',
-                           options: { header: { 'Content-Type': 'text/xml' } }
-                       }, function() { return true; });
-                   }
+               if (nodes.keyto.indexOf(n) !== -1) {
+                 connectKeyTo = true;

                }
                }

-           },
+             }
+
+             if (connectFrom && connectTo && !isUturn) {
+               return 'restriction';
+             }

 
 

+             if (connectFrom && connectVia) {
+               return 'restriction';
+             }

 
 

-           // Load multiple users in chunks
-           // (note: callback may be called multiple times)
-           // GET /api/0.6/users?users=#id1,#id2,...,#idn
-           loadUsers: function(uids, callback) {
-               var toLoad = [];
-               var cached = [];
+             if (connectTo && connectVia) {
+               return 'restriction';
+             } // connecting to a key node -
+             // if both nodes are on a member way (i.e. part of the turn restriction),
+             // the connecting node must be adjacent to the key node.

 
 

-               utilArrayUniq(uids).forEach(function(uid) {
-                   if (_userCache.user[uid]) {
-                       delete _userCache.toLoad[uid];
-                       cached.push(_userCache.user[uid]);
-                   } else {
-                       toLoad.push(uid);
-                   }
-               });

 
 

-               if (cached.length || !this.authenticated()) {
-                   callback(undefined, cached);
-                   if (!this.authenticated()) { return; }  // require auth
+             if (connectKeyFrom || connectKeyTo) {
+               if (nodeIDs.length !== 2) {
+                 return 'restriction';

                }
 
                }
 

-               utilArrayChunk(toLoad, 150).forEach(function(arr) {
-                   oauth.xhr(
-                       { method: 'GET', path: '/api/0.6/users?users=' + arr.join() },
-                       wrapcb(this, done, _connectionID)
-                   );
-               }.bind(this));
-
-               function done(err, xml) {
-                   if (err) { return callback(err); }
+               var n0 = null;
+               var n1 = null;

 
 

-                   var options = { skipSeen: true };
-                   return parseXML(xml, function(err, results) {
-                       if (err) {
-                           return callback(err);
-                       } else {
-                           return callback(undefined, results);
-                       }
-                   }, options);
-               }
-           },
+               for (j = 0; j < memberWays.length; j++) {
+                 way = memberWays[j];

 
 

+                 if (way.contains(nodeIDs[0])) {
+                   n0 = nodeIDs[0];
+                 }

 
 

-           // Load a given user by id
-           // GET /api/0.6/user/#id
-           loadUser: function(uid, callback) {
-               if (_userCache.user[uid] || !this.authenticated()) {   // require auth
-                   delete _userCache.toLoad[uid];
-                   return callback(undefined, _userCache.user[uid]);
+                 if (way.contains(nodeIDs[1])) {
+                   n1 = nodeIDs[1];
+                 }

                }
 
                }
 

-               oauth.xhr(
-                   { method: 'GET', path: '/api/0.6/user/' + uid },
-                   wrapcb(this, done, _connectionID)
-               );
+               if (n0 && n1) {
+                 // both nodes are part of the restriction
+                 var ok = false;

 
 

-               function done(err, xml) {
-                   if (err) { return callback(err); }
+                 for (j = 0; j < memberWays.length; j++) {
+                   way = memberWays[j];

 
 

-                   var options = { skipSeen: true };
-                   return parseXML(xml, function(err, results) {
-                       if (err) {
-                           return callback(err);
-                       } else {
-                           return callback(undefined, results[0]);
-                       }
-                   }, options);
+                   if (way.areAdjacent(n0, n1)) {
+                     ok = true;
+                     break;
+                   }
+                 }
+
+                 if (!ok) {
+                   return 'restriction';
+                 }

                }
                }

-           },
+             } // 2b. disable if nodes being connected will destroy a member way in a restriction
+             // (to test, make a copy and try actually connecting the nodes)

 
 
 
 

-           // Load the details of the logged-in user
-           // GET /api/0.6/user/details
-           userDetails: function(callback) {
-               if (_userDetails) {    // retrieve cached
-                   return callback(undefined, _userDetails);
-               }
+             for (j = 0; j < memberWays.length; j++) {
+               way = memberWays[j].update({}); // make copy

 
 

-               oauth.xhr(
-                   { method: 'GET', path: '/api/0.6/user/details' },
-                   wrapcb(this, done, _connectionID)
-               );
+               for (k = 0; k < nodeIDs.length; k++) {
+                 if (nodeIDs[k] === survivor.id) continue;

 
 

-               function done(err, xml) {
-                   if (err) { return callback(err); }
+                 if (way.areAdjacent(nodeIDs[k], survivor.id)) {
+                   way = way.removeNode(nodeIDs[k]);
+                 } else {
+                   way = way.replaceNode(nodeIDs[k], survivor.id);
+                 }
+               }

 
 

-                   var options = { skipSeen: false };
-                   return parseXML(xml, function(err, results) {
-                       if (err) {
-                           return callback(err);
-                       } else {
-                           _userDetails = results[0];
-                           return callback(undefined, _userDetails);
-                       }
-                   }, options);
+               if (way.isDegenerate()) {
+                 return 'restriction';

                }
                }

-           },
+             }
+           }

 
 

+           return false; // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction

 
 

-           // Load previous changesets for the logged in user
-           // GET /api/0.6/changesets?user=#id
-           userChangesets: function(callback) {
-               if (_userChangesets) {    // retrieve cached
-                   return callback(undefined, _userChangesets);
-               }
+           function hasDuplicates(n, i, arr) {
+             return arr.indexOf(n) !== arr.lastIndexOf(n);
+           }

 
 

-               this.userDetails(
-                   wrapcb(this, gotDetails, _connectionID)
-               );
+           function keyNodeFilter(froms, tos) {
+             return function (n) {
+               return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
+             };
+           }
+
+           function collectNodes(member, collection) {
+             var entity = graph.hasEntity(member.id);
+             if (!entity) return;
+             var role = member.role || '';

 
 

+             if (!collection[role]) {
+               collection[role] = [];
+             }

 
 

-               function gotDetails(err, user) {
-                   if (err) { return callback(err); }
+             if (member.type === 'node') {
+               collection[role].push(member.id);

 
 

-                   oauth.xhr(
-                       { method: 'GET', path: '/api/0.6/changesets?user=' + user.id },
-                       wrapcb(this, done, _connectionID)
-                   );
+               if (role === 'via') {
+                 collection.keyfrom.push(member.id);
+                 collection.keyto.push(member.id);

                }
                }

+             } else if (member.type === 'way') {
+               collection[role].push.apply(collection[role], entity.nodes);

 
 

-               function done(err, xml) {
-                   if (err) { return callback(err); }
-
-                   _userChangesets = Array.prototype.map.call(
-                       xml.getElementsByTagName('changeset'),
-                       function (changeset) { return { tags: getTags(changeset) }; }
-                   ).filter(function (changeset) {
-                       var comment = changeset.tags.comment;
-                       return comment && comment !== '';
-                   });
+               if (role === 'from' || role === 'via') {
+                 collection.keyfrom.push(entity.first());
+                 collection.keyfrom.push(entity.last());
+               }

 
 

-                   return callback(undefined, _userChangesets);
+               if (role === 'to' || role === 'via') {
+                 collection.keyto.push(entity.first());
+                 collection.keyto.push(entity.last());

                }
                }

-           },
+             }
+           }
+         };

 
 

+         return action;
+       }

 
 

-           // Fetch the status of the OSM API
-           // GET /api/capabilities
-           status: function(callback) {
-               var url = urlroot + '/api/capabilities';
-               var errback = wrapcb(this, done, _connectionID);
-               d3_xml(url)
-                   .then(function(data) { errback(null, data); })
-                   .catch(function(err) { errback(err.message); });
+       function actionCopyEntities(ids, fromGraph) {
+         var _copies = {};

 
 

-               function done(err, xml) {
-                   if (err) {
-                       // the status is null if no response could be retrieved
-                       return callback(err, null);
-                   }
+         var action = function action(graph) {
+           ids.forEach(function (id) {
+             fromGraph.entity(id).copy(fromGraph, _copies);
+           });

 
 

-                   // update blacklists
-                   var elements = xml.getElementsByTagName('blacklist');
-                   var regexes = [];
-                   for (var i = 0; i < elements.length; i++) {
-                       var regex = elements[i].getAttribute('regex');  // needs unencode?
-                       if (regex) {
-                           regexes.push(regex);
-                       }
-                   }
-                   if (regexes.length) {
-                       _blacklists = regexes;
-                   }
+           for (var id in _copies) {
+             graph = graph.replace(_copies[id]);
+           }

 
 

-                   if (_rateLimitError) {
-                       return callback(_rateLimitError, 'rateLimited');
-                   } else {
-                       var waynodes = xml.getElementsByTagName('waynodes');
-                       var maxWayNodes = waynodes.length && parseInt(waynodes[0].getAttribute('maximum'), 10);
-                       if (maxWayNodes && isFinite(maxWayNodes)) { _maxWayNodes = maxWayNodes; }
+           return graph;
+         };

 
 

-                       var apiStatus = xml.getElementsByTagName('status');
-                       var val = apiStatus[0].getAttribute('api');
-                       return callback(undefined, val);
-                   }
-               }
-           },
+         action.copies = function () {
+           return _copies;
+         };

 
 

-           // Calls `status` and dispatches an `apiStatusChange` event if the returned
-           // status differs from the cached status.
-           reloadApiStatus: function() {
-               // throttle to avoid unncessary API calls
-               if (!this.throttledReloadApiStatus) {
-                   var that = this;
-                   this.throttledReloadApiStatus = throttle(function() {
-                       that.status(function(err, status) {
-                           if (status !== _cachedApiStatus) {
-                               _cachedApiStatus = status;
-                               dispatch$6.call('apiStatusChange', that, err, status);
-                           }
-                       });
-                   }, 500);
-               }
-               this.throttledReloadApiStatus();
-           },
+         return action;
+       }
+
+       function actionDeleteMember(relationId, memberIndex) {
+         return function (graph) {
+           var relation = graph.entity(relationId).removeMember(memberIndex);
+           graph = graph.replace(relation);

 
 

+           if (relation.isDegenerate()) {
+             graph = actionDeleteRelation(relation.id)(graph);
+           }

 
 

-           // Returns the maximum number of nodes a single way can have
-           maxWayNodes: function() {
-               return _maxWayNodes;
-           },
+           return graph;
+         };
+       }

 
 

+       function actionDiscardTags(difference, discardTags) {
+         discardTags = discardTags || {};
+         return function (graph) {
+           difference.modified().forEach(checkTags);
+           difference.created().forEach(checkTags);
+           return graph;

 
 

-           // Load data (entities) from the API in tiles
-           // GET /api/0.6/map?bbox=
-           loadTiles: function(projection, callback) {
-               if (_off) { return; }
+           function checkTags(entity) {
+             var keys = Object.keys(entity.tags);
+             var didDiscard = false;
+             var tags = {};

 
 

-               // determine the needed tiles to cover the view
-               var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection);
+             for (var i = 0; i < keys.length; i++) {
+               var k = keys[i];

 
 

-               // abort inflight requests that are no longer needed
-               var hadRequests = hasInflightRequests(_tileCache);
-               abortUnwantedRequests$3(_tileCache, tiles);
-               if (hadRequests && !hasInflightRequests(_tileCache)) {
-                   dispatch$6.call('loaded');    // stop the spinner
+               if (discardTags[k] || !entity.tags[k]) {
+                 didDiscard = true;
+               } else {
+                 tags[k] = entity.tags[k];

                }
                }

+             }

 
 

-               // issue new requests..
-               tiles.forEach(function(tile) {
-                   this.loadTile(tile, callback);
-               }, this);
-           },
+             if (didDiscard) {
+               graph = graph.replace(entity.update({
+                 tags: tags
+               }));
+             }
+           }
+         };
+       }
+
+       //
+       // Optionally, disconnect only the given ways.
+       //
+       // For testing convenience, accepts an ID to assign to the (first) new node.
+       // Normally, this will be undefined and the way will automatically
+       // be assigned a new ID.
+       //
+       // This is the inverse of `iD.actionConnect`.
+       //
+       // Reference:
+       //   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/UnjoinNodeAction.as
+       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/UnGlueAction.java
+       //

 
 

+       function actionDisconnect(nodeId, newNodeId) {
+         var wayIds;
+
+         var action = function action(graph) {
+           var node = graph.entity(nodeId);
+           var connections = action.connections(graph);
+           connections.forEach(function (connection) {
+             var way = graph.entity(connection.wayID);
+             var newNode = osmNode({
+               id: newNodeId,
+               loc: node.loc,
+               tags: node.tags
+             });
+             graph = graph.replace(newNode);
+
+             if (connection.index === 0 && way.isArea()) {
+               // replace shared node with shared node..
+               graph = graph.replace(way.replaceNode(way.nodes[0], newNode.id));
+             } else if (way.isClosed() && connection.index === way.nodes.length - 1) {
+               // replace closing node with new new node..
+               graph = graph.replace(way.unclose().addNode(newNode.id));
+             } else {
+               // replace shared node with multiple new nodes..
+               graph = graph.replace(way.updateNode(newNode.id, connection.index));
+             }
+           });
+           return graph;
+         };

 
 

-           // Load a single data tile
-           // GET /api/0.6/map?bbox=
-           loadTile: function(tile, callback) {
-               if (_off) { return; }
-               if (_tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) { return; }
+         action.connections = function (graph) {
+           var candidates = [];
+           var keeping = false;
+           var parentWays = graph.parentWays(graph.entity(nodeId));
+           var way, waynode;

 
 

-               if (!hasInflightRequests(_tileCache)) {
-                   dispatch$6.call('loading');   // start the spinner
-               }
+           for (var i = 0; i < parentWays.length; i++) {
+             way = parentWays[i];

 
 

-               var path = '/api/0.6/map.json?bbox=';
-               var options = { skipSeen: true };
+             if (wayIds && wayIds.indexOf(way.id) === -1) {
+               keeping = true;
+               continue;
+             }

 
 

-               _tileCache.inflight[tile.id] = this.loadFromAPI(
-                   path + tile.extent.toParam(),
-                   tileCallback,
-                   options
-               );
+             if (way.isArea() && way.nodes[0] === nodeId) {
+               candidates.push({
+                 wayID: way.id,
+                 index: 0
+               });
+             } else {
+               for (var j = 0; j < way.nodes.length; j++) {
+                 waynode = way.nodes[j];

 
 

-               function tileCallback(err, parsed) {
-                   delete _tileCache.inflight[tile.id];
-                   if (!err) {
-                       delete _tileCache.toLoad[tile.id];
-                       _tileCache.loaded[tile.id] = true;
-                       var bbox = tile.extent.bbox();
-                       bbox.id = tile.id;
-                       _tileCache.rtree.insert(bbox);
-                   }
-                   if (callback) {
-                       callback(err, Object.assign({ data: parsed }, tile));
+                 if (waynode === nodeId) {
+                   if (way.isClosed() && parentWays.length > 1 && wayIds && wayIds.indexOf(way.id) !== -1 && j === way.nodes.length - 1) {
+                     continue;

                    }
                    }

-                   if (!hasInflightRequests(_tileCache)) {
-                       dispatch$6.call('loaded');     // stop the spinner
+
+                   candidates.push({
+                     wayID: way.id,
+                     index: j
+                   });
+                 }
+               }
+             }
+           }
+
+           return keeping ? candidates : candidates.slice(1);
+         };
+
+         action.disabled = function (graph) {
+           var connections = action.connections(graph);
+           if (connections.length === 0) return 'not_connected';
+           var parentWays = graph.parentWays(graph.entity(nodeId));
+           var seenRelationIds = {};
+           var sharedRelation;
+           parentWays.forEach(function (way) {
+             var relations = graph.parentRelations(way);
+             relations.forEach(function (relation) {
+               if (relation.id in seenRelationIds) {
+                 if (wayIds) {
+                   if (wayIds.indexOf(way.id) !== -1 || wayIds.indexOf(seenRelationIds[relation.id]) !== -1) {
+                     sharedRelation = relation;

                    }
                    }

+                 } else {
+                   sharedRelation = relation;
+                 }
+               } else {
+                 seenRelationIds[relation.id] = way.id;

                }
                }

-           },
+             });
+           });
+           if (sharedRelation) return 'relation';
+         };

 
 

+         action.limitWays = function (val) {
+           if (!arguments.length) return wayIds;
+           wayIds = val;
+           return action;
+         };
+
+         return action;
+       }
+
+       function actionExtract(entityID, projection) {
+         var extractedNodeID;
+
+         var action = function action(graph) {
+           var entity = graph.entity(entityID);
+
+           if (entity.type === 'node') {
+             return extractFromNode(entity, graph);
+           }
+
+           return extractFromWayOrRelation(entity, graph);
+         };
+
+         function extractFromNode(node, graph) {
+           extractedNodeID = node.id; // Create a new node to replace the one we will detach
+
+           var replacement = osmNode({
+             loc: node.loc
+           });
+           graph = graph.replace(replacement); // Process each way in turn, updating the graph as we go
+
+           graph = graph.parentWays(node).reduce(function (accGraph, parentWay) {
+             return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
+           }, graph); // Process any relations too
+
+           return graph.parentRelations(node).reduce(function (accGraph, parentRel) {
+             return accGraph.replace(parentRel.replaceMember(node, replacement));
+           }, graph);
+         }

 
 

-           isDataLoaded: function(loc) {
-               var bbox = { minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1] };
-               return _tileCache.rtree.collides(bbox);
-           },
+         function extractFromWayOrRelation(entity, graph) {
+           var fromGeometry = entity.geometry(graph);
+           var keysToCopyAndRetain = ['source', 'wheelchair'];
+           var keysToRetain = ['area'];
+           var buildingKeysToRetain = ['architect', 'building', 'height', 'layer'];
+           var extractedLoc = d3_geoPath(projection).centroid(entity.asGeoJSON(graph));
+           extractedLoc = extractedLoc && projection.invert(extractedLoc);

 
 

+           if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
+             extractedLoc = entity.extent(graph).center();
+           }

 
 

-           // load the tile that covers the given `loc`
-           loadTileAtLoc: function(loc, callback) {
-               // Back off if the toLoad queue is filling up.. re #6417
-               // (Currently `loadTileAtLoc` requests are considered low priority - used by operations to
-               // let users safely edit geometries which extend to unloaded tiles.  We can drop some.)
-               if (Object.keys(_tileCache.toLoad).length > 50) { return; }
+           var indoorAreaValues = {
+             area: true,
+             corridor: true,
+             elevator: true,
+             level: true,
+             room: true
+           };
+           var isBuilding = entity.tags.building && entity.tags.building !== 'no' || entity.tags['building:part'] && entity.tags['building:part'] !== 'no';
+           var isIndoorArea = fromGeometry === 'area' && entity.tags.indoor && indoorAreaValues[entity.tags.indoor];
+           var entityTags = Object.assign({}, entity.tags); // shallow copy

 
 

-               var k = geoZoomToScale(_tileZoom$3 + 1);
-               var offset = geoRawMercator().scale(k)(loc);
-               var projection = geoRawMercator().transform({ k: k, x: -offset[0], y: -offset[1] });
-               var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection);
+           var pointTags = {};

 
 

-               tiles.forEach(function(tile) {
-                   if (_tileCache.toLoad[tile.id] || _tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) { return; }
+           for (var key in entityTags) {
+             if (entity.type === 'relation' && key === 'type') {
+               continue;
+             }

 
 

-                   _tileCache.toLoad[tile.id] = true;
-                   this.loadTile(tile, callback);
-               }, this);
-           },
+             if (keysToRetain.indexOf(key) !== -1) {
+               continue;
+             }

 
 

+             if (isBuilding) {
+               // don't transfer building-related tags
+               if (buildingKeysToRetain.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+             } // leave `indoor` tag on the area

 
 

-           // Load notes from the API in tiles
-           // GET /api/0.6/notes?bbox=
-           loadNotes: function(projection, noteOptions) {
-               noteOptions = Object.assign({ limit: 10000, closed: 7 }, noteOptions);
-               if (_off) { return; }

 
 

-               var that = this;
-               var path = '/api/0.6/notes?limit=' + noteOptions.limit + '&closed=' + noteOptions.closed + '&bbox=';
-               var throttleLoadUsers = throttle(function() {
-                   var uids = Object.keys(_userCache.toLoad);
-                   if (!uids.length) { return; }
-                   that.loadUsers(uids, function() {});  // eagerly load user details
-               }, 750);
-
-               // determine the needed tiles to cover the view
-               var tiles = tiler$5.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection);
-
-               // abort inflight requests that are no longer needed
-               abortUnwantedRequests$3(_noteCache, tiles);
-
-               // issue new requests..
-               tiles.forEach(function(tile) {
-                   if (_noteCache.loaded[tile.id] || _noteCache.inflight[tile.id]) { return; }
-
-                   var options = { skipSeen: false };
-                   _noteCache.inflight[tile.id] = that.loadFromAPI(
-                       path + tile.extent.toParam(),
-                       function(err) {
-                           delete _noteCache.inflight[tile.id];
-                           if (!err) {
-                               _noteCache.loaded[tile.id] = true;
-                           }
-                           throttleLoadUsers();
-                           dispatch$6.call('loadedNotes');
-                       },
-                       options
-                   );
-               });
-           },
+             if (isIndoorArea && key === 'indoor') {
+               continue;
+             } // copy the tag from the entity to the point

 
 
 
 

-           // Create a note
-           // POST /api/0.6/notes?params
-           postNoteCreate: function(note, callback) {
-               if (!this.authenticated()) {
-                   return callback({ message: 'Not Authenticated', status: -3 }, note);
-               }
-               if (_noteCache.inflightPost[note.id]) {
-                   return callback({ message: 'Note update already inflight', status: -2 }, note);
-               }
+             pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features

 
 

-               if (!note.loc[0] || !note.loc[1] || !note.newComment) { return; } // location & description required
+             if (keysToCopyAndRetain.indexOf(key) !== -1 || key.match(/^addr:.{1,}/)) {
+               continue;
+             } else if (isIndoorArea && key === 'level') {
+               // leave `level` on both features
+               continue;
+             } // remove the tag from the entity

 
 

-               var comment = note.newComment;
-               if (note.newCategory && note.newCategory !== 'None') { comment += ' #' + note.newCategory; }

 
 

-               var path = '/api/0.6/notes?' + utilQsString({ lon: note.loc[0], lat: note.loc[1], text: comment });
+             delete entityTags[key];
+           }

 
 

-               _noteCache.inflightPost[note.id] = oauth.xhr(
-                   { method: 'POST', path: path },
-                   wrapcb(this, done, _connectionID)
-               );
+           if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
+             // ensure that areas keep area geometry
+             entityTags.area = 'yes';
+           }

 
 

+           var replacement = osmNode({
+             loc: extractedLoc,
+             tags: pointTags
+           });
+           graph = graph.replace(replacement);
+           extractedNodeID = replacement.id;
+           return graph.replace(entity.update({
+             tags: entityTags
+           }));
+         }

 
 

-               function done(err, xml) {
-                   delete _noteCache.inflightPost[note.id];
-                   if (err) { return callback(err); }
+         action.getExtractedNodeID = function () {
+           return extractedNodeID;
+         };

 
 

-                   // we get the updated note back, remove from caches and reparse..
-                   this.removeNote(note);
+         return action;
+       }

 
 

-                   var options = { skipSeen: false };
-                   return parseXML(xml, function(err, results) {
-                       if (err) {
-                           return callback(err);
-                       } else {
-                           return callback(undefined, results[0]);
-                       }
-                   }, options);
-               }
-           },
+       //
+       // This is the inverse of `iD.actionSplit`.
+       //
+       // Reference:
+       //   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeWaysAction.as
+       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/CombineWayAction.java
+       //

 
 

+       function actionJoin(ids) {
+         function groupEntitiesByGeometry(graph) {
+           var entities = ids.map(function (id) {
+             return graph.entity(id);
+           });
+           return Object.assign({
+             line: []
+           }, utilArrayGroupBy(entities, function (entity) {
+             return entity.geometry(graph);
+           }));
+         }
+
+         var action = function action(graph) {
+           var ways = ids.map(graph.entity, graph); // if any of the ways are sided (e.g. coastline, cliff, kerb)
+           // sort them first so they establish the overall order - #6033
+
+           ways.sort(function (a, b) {
+             var aSided = a.isSided();
+             var bSided = b.isSided();
+             return aSided && !bSided ? -1 : bSided && !aSided ? 1 : 0;
+           }); // Prefer to keep an existing way.
+           // if there are multiple existing ways, keep the oldest one
+           // the oldest way is determined by the ID of the way
+
+           var survivorID = (ways.filter(function (way) {
+             return !way.isNew();
+           }).sort(function (a, b) {
+             return +a.osmId() - +b.osmId();
+           })[0] || ways[0]).id;
+           var sequences = osmJoinWays(ways, graph);
+           var joined = sequences[0]; // We might need to reverse some of these ways before joining them.  #4688
+           // `joined.actions` property will contain any actions we need to apply.
+
+           graph = sequences.actions.reduce(function (g, action) {
+             return action(g);
+           }, graph);
+           var survivor = graph.entity(survivorID);
+           survivor = survivor.update({
+             nodes: joined.nodes.map(function (n) {
+               return n.id;
+             })
+           });
+           graph = graph.replace(survivor);
+           joined.forEach(function (way) {
+             if (way.id === survivorID) return;
+             graph.parentRelations(way).forEach(function (parent) {
+               graph = graph.replace(parent.replaceMember(way, survivor));
+             });
+             survivor = survivor.mergeTags(way.tags);
+             graph = graph.replace(survivor);
+             graph = actionDeleteWay(way.id)(graph);
+           }); // Finds if the join created a single-member multipolygon,
+           // and if so turns it into a basic area instead
+
+           function checkForSimpleMultipolygon() {
+             if (!survivor.isClosed()) return;
+             var multipolygons = graph.parentMultipolygons(survivor).filter(function (multipolygon) {
+               // find multipolygons where the survivor is the only member
+               return multipolygon.members.length === 1;
+             }); // skip if this is the single member of multiple multipolygons
+
+             if (multipolygons.length !== 1) return;
+             var multipolygon = multipolygons[0];
+
+             for (var key in survivor.tags) {
+               if (multipolygon.tags[key] && // don't collapse if tags cannot be cleanly merged
+               multipolygon.tags[key] !== survivor.tags[key]) return;
+             }

 
 

-           // Update a note
-           // POST /api/0.6/notes/#id/comment?text=comment
-           // POST /api/0.6/notes/#id/close?text=comment
-           // POST /api/0.6/notes/#id/reopen?text=comment
-           postNoteUpdate: function(note, newStatus, callback) {
-               if (!this.authenticated()) {
-                   return callback({ message: 'Not Authenticated', status: -3 }, note);
-               }
-               if (_noteCache.inflightPost[note.id]) {
-                   return callback({ message: 'Note update already inflight', status: -2 }, note);
-               }
+             survivor = survivor.mergeTags(multipolygon.tags);
+             graph = graph.replace(survivor);
+             graph = actionDeleteRelation(multipolygon.id, true
+             /* allow untagged members */
+             )(graph);
+             var tags = Object.assign({}, survivor.tags);

 
 

-               var action;
-               if (note.status !== 'closed' && newStatus === 'closed') {
-                   action = 'close';
-               } else if (note.status !== 'open' && newStatus === 'open') {
-                   action = 'reopen';
-               } else {
-                   action = 'comment';
-                   if (!note.newComment) { return; } // when commenting, comment required
-               }
+             if (survivor.geometry(graph) !== 'area') {
+               // ensure the feature persists as an area
+               tags.area = 'yes';
+             }

 
 

-               var path = '/api/0.6/notes/' + note.id + '/' + action;
-               if (note.newComment) {
-                   path += '?' + utilQsString({ text: note.newComment });
-               }
+             delete tags.type; // remove type=multipolygon

 
 

-               _noteCache.inflightPost[note.id] = oauth.xhr(
-                   { method: 'POST', path: path },
-                   wrapcb(this, done, _connectionID)
-               );
+             survivor = survivor.update({
+               tags: tags
+             });
+             graph = graph.replace(survivor);
+           }

 
 

+           checkForSimpleMultipolygon();
+           return graph;
+         }; // Returns the number of nodes the resultant way is expected to have

 
 

-               function done(err, xml) {
-                   delete _noteCache.inflightPost[note.id];
-                   if (err) { return callback(err); }

 
 

-                   // we get the updated note back, remove from caches and reparse..
-                   this.removeNote(note);
+         action.resultingWayNodesLength = function (graph) {
+           return ids.reduce(function (count, id) {
+             return count + graph.entity(id).nodes.length;
+           }, 0) - ids.length - 1;
+         };

 
 

-                   // update closed note cache - used to populate `closed:note` changeset tag
-                   if (action === 'close') {
-                       _noteCache.closed[note.id] = true;
-                   } else if (action === 'reopen') {
-                       delete _noteCache.closed[note.id];
-                   }
+         action.disabled = function (graph) {
+           var geometries = groupEntitiesByGeometry(graph);

 
 

-                   var options = { skipSeen: false };
-                   return parseXML(xml, function(err, results) {
-                       if (err) {
-                           return callback(err);
-                       } else {
-                           return callback(undefined, results[0]);
-                       }
-                   }, options);
-               }
-           },
+           if (ids.length < 2 || ids.length !== geometries.line.length) {
+             return 'not_eligible';
+           }

 
 

+           var joined = osmJoinWays(ids.map(graph.entity, graph), graph);

 
 

-           switch: function(options) {
-               urlroot = options.urlroot;
+           if (joined.length > 1) {
+             return 'not_adjacent';
+           }

 
 

-               oauth.options(Object.assign({
-                   url: urlroot,
-                   loading: authLoading,
-                   done: authDone
-               }, options));
+           var i; // All joined ways must belong to the same set of (non-restriction) relations.
+           // Restriction relations have different logic, below, which allows some cases
+           // this prohibits, and prohibits some cases this allows.

 
 

-               this.reset();
-               this.userChangesets(function() {});  // eagerly load user details/changesets
-               dispatch$6.call('change');
-               return this;
-           },
+           var sortedParentRelations = function sortedParentRelations(id) {
+             return graph.parentRelations(graph.entity(id)).filter(function (rel) {
+               return !rel.isRestriction() && !rel.isConnectivity();
+             }).sort(function (a, b) {
+               return a.id - b.id;
+             });
+           };

 
 

+           var relsA = sortedParentRelations(ids[0]);

 
 

-           toggle: function(val) {
-               _off = !val;
-               return this;
-           },
+           for (i = 1; i < ids.length; i++) {
+             var relsB = sortedParentRelations(ids[i]);

 
 

+             if (!utilArrayIdentical(relsA, relsB)) {
+               return 'conflicting_relations';
+             }
+           } // Loop through all combinations of path-pairs
+           // to check potential intersections between all pairs

 
 

-           isChangesetInflight: function() {
-               return !!_changeset.inflight;
-           },

 
 

+           for (i = 0; i < ids.length - 1; i++) {
+             for (var j = i + 1; j < ids.length; j++) {
+               var path1 = graph.childNodes(graph.entity(ids[i])).map(function (e) {
+                 return e.loc;
+               });
+               var path2 = graph.childNodes(graph.entity(ids[j])).map(function (e) {
+                 return e.loc;
+               });
+               var intersections = geoPathIntersections(path1, path2); // Check if intersections are just nodes lying on top of
+               // each other/the line, as opposed to crossing it

 
 

-           // get/set cached data
-           // This is used to save/restore the state when entering/exiting the walkthrough
-           // Also used for testing purposes.
-           caches: function(obj) {
-               function cloneCache(source) {
-                   var target = {};
-                   Object.keys(source).forEach(function(k) {
-                       if (k === 'rtree') {
-                           target.rtree = new RBush().fromJSON(source.rtree.toJSON());  // clone rbush
-                       } else if (k === 'note') {
-                           target.note = {};
-                           Object.keys(source.note).forEach(function(id) {
-                               target.note[id] = osmNote(source.note[id]);   // copy notes
-                           });
-                       } else {
-                           target[k] = JSON.parse(JSON.stringify(source[k]));   // clone deep
-                       }
-                   });
-                   return target;
-               }
+               var common = utilArrayIntersection(joined[0].nodes.map(function (n) {
+                 return n.loc.toString();
+               }), intersections.map(function (n) {
+                 return n.toString();
+               }));

 
 

-               if (!arguments.length) {
-                   return {
-                       tile: cloneCache(_tileCache),
-                       note: cloneCache(_noteCache),
-                       user: cloneCache(_userCache)
-                   };
+               if (common.length !== intersections.length) {
+                 return 'paths_intersect';

                }
                }

+             }
+           }

 
 

-               // access caches directly for testing (e.g., loading notes rtree)
-               if (obj === 'get') {
-                   return {
-                       tile: _tileCache,
-                       note: _noteCache,
-                       user: _userCache
-                   };
+           var nodeIds = joined[0].nodes.map(function (n) {
+             return n.id;
+           }).slice(1, -1);
+           var relation;
+           var tags = {};
+           var conflicting = false;
+           joined[0].forEach(function (way) {
+             var parents = graph.parentRelations(way);
+             parents.forEach(function (parent) {
+               if ((parent.isRestriction() || parent.isConnectivity()) && parent.members.some(function (m) {
+                 return nodeIds.indexOf(m.id) >= 0;
+               })) {
+                 relation = parent;

                }
                }

+             });

 
 

-               if (obj.tile) {
-                   _tileCache = obj.tile;
-                   _tileCache.inflight = {};
-               }
-               if (obj.note) {
-                   _noteCache = obj.note;
-                   _noteCache.inflight = {};
-                   _noteCache.inflightPost = {};
-               }
-               if (obj.user) {
-                   _userCache = obj.user;
+             for (var k in way.tags) {
+               if (!(k in tags)) {
+                 tags[k] = way.tags[k];
+               } else if (tags[k] && osmIsInterestingTag(k) && tags[k] !== way.tags[k]) {
+                 conflicting = true;

                }
                }

+             }
+           });

 
 

-               return this;
-           },
-
-
-           logout: function() {
-               _userChangesets = undefined;
-               _userDetails = undefined;
-               oauth.logout();
-               dispatch$6.call('change');
-               return this;
-           },
+           if (relation) {
+             return relation.isRestriction() ? 'restriction' : 'connectivity';
+           }

 
 

+           if (conflicting) {
+             return 'conflicting_tags';
+           }
+         };

 
 

-           authenticated: function() {
-               return oauth.authenticated();
-           },
+         return action;
+       }

 
 

+       function actionMerge(ids) {
+         function groupEntitiesByGeometry(graph) {
+           var entities = ids.map(function (id) {
+             return graph.entity(id);
+           });
+           return Object.assign({
+             point: [],
+             area: [],
+             line: [],
+             relation: []
+           }, utilArrayGroupBy(entities, function (entity) {
+             return entity.geometry(graph);
+           }));
+         }
+
+         var action = function action(graph) {
+           var geometries = groupEntitiesByGeometry(graph);
+           var target = geometries.area[0] || geometries.line[0];
+           var points = geometries.point;
+           points.forEach(function (point) {
+             target = target.mergeTags(point.tags);
+             graph = graph.replace(target);
+             graph.parentRelations(point).forEach(function (parent) {
+               graph = graph.replace(parent.replaceMember(point, target));
+             });
+             var nodes = utilArrayUniq(graph.childNodes(target));
+             var removeNode = point;

 
 

-           authenticate: function(callback) {
-               var that = this;
-               var cid = _connectionID;
-               _userChangesets = undefined;
-               _userDetails = undefined;
+             for (var i = 0; i < nodes.length; i++) {
+               var node = nodes[i];

 
 

-               function done(err, res) {
-                   if (err) {
-                       if (callback) { callback(err); }
-                       return;
-                   }
-                   if (that.getConnectionId() !== cid) {
-                       if (callback) { callback({ message: 'Connection Switched', status: -1 }); }
-                       return;
-                   }
-                   _rateLimitError = undefined;
-                   dispatch$6.call('change');
-                   if (callback) { callback(err, res); }
-                   that.userChangesets(function() {});  // eagerly load user details/changesets
-               }
+               if (graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags()) {
+                 continue;
+               } // Found an uninteresting child node on the target way.
+               // Move orig point into its place to preserve point's history. #3683

 
 

-               return oauth.authenticate(done);
-           },

 
 

+               graph = graph.replace(point.update({
+                 tags: {},
+                 loc: node.loc
+               }));
+               target = target.replaceNode(node.id, point.id);
+               graph = graph.replace(target);
+               removeNode = node;
+               break;
+             }

 
 

-           imageryBlacklists: function() {
-               return _blacklists;
-           },
+             graph = graph.remove(removeNode);
+           });

 
 

+           if (target.tags.area === 'yes') {
+             var tags = Object.assign({}, target.tags); // shallow copy

 
 

-           tileZoom: function(val) {
-               if (!arguments.length) { return _tileZoom$3; }
-               _tileZoom$3 = val;
-               return this;
-           },
+             delete tags.area;

 
 

+             if (osmTagSuggestingArea(tags)) {
+               // remove the `area` tag if area geometry is now implied - #3851
+               target = target.update({
+                 tags: tags
+               });
+               graph = graph.replace(target);
+             }
+           }

 
 

-           // get all cached notes covering the viewport
-           notes: function(projection) {
-               var viewport = projection.clipExtent();
-               var min = [viewport[0][0], viewport[1][1]];
-               var max = [viewport[1][0], viewport[0][1]];
-               var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           return graph;
+         };

 
 

-               return _noteCache.rtree.search(bbox)
-                   .map(function(d) { return d.data; });
-           },
+         action.disabled = function (graph) {
+           var geometries = groupEntitiesByGeometry(graph);

 
 

+           if (geometries.point.length === 0 || geometries.area.length + geometries.line.length !== 1 || geometries.relation.length !== 0) {
+             return 'not_eligible';
+           }
+         };

 
 

-           // get a single note from the cache
-           getNote: function(id) {
-               return _noteCache.note[id];
-           },
+         return action;
+       }

 
 

+       //
+       // 1. move all the nodes to a common location
+       // 2. `actionConnect` them

 
 

-           // remove a single note from the cache
-           removeNote: function(note) {
-               if (!(note instanceof osmNote) || !note.id) { return; }
+       function actionMergeNodes(nodeIDs, loc) {
+         // If there is a single "interesting" node, use that as the location.
+         // Otherwise return the average location of all the nodes.
+         function chooseLoc(graph) {
+           if (!nodeIDs.length) return null;
+           var sum = [0, 0];
+           var interestingCount = 0;
+           var interestingLoc;
+
+           for (var i = 0; i < nodeIDs.length; i++) {
+             var node = graph.entity(nodeIDs[i]);
+
+             if (node.hasInterestingTags()) {
+               interestingLoc = ++interestingCount === 1 ? node.loc : null;
+             }

 
 

-               delete _noteCache.note[note.id];
-               updateRtree$3(encodeNoteRtree(note), false);  // false = remove
-           },
+             sum = geoVecAdd(sum, node.loc);
+           }

 
 

+           return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
+         }

 
 

-           // replace a single note in the cache
-           replaceNote: function(note) {
-               if (!(note instanceof osmNote) || !note.id) { return; }
+         var action = function action(graph) {
+           if (nodeIDs.length < 2) return graph;
+           var toLoc = loc;

 
 

-               _noteCache.note[note.id] = note;
-               updateRtree$3(encodeNoteRtree(note), true);  // true = replace
-               return note;
-           },
+           if (!toLoc) {
+             toLoc = chooseLoc(graph);
+           }

 
 

+           for (var i = 0; i < nodeIDs.length; i++) {
+             var node = graph.entity(nodeIDs[i]);

 
 

-           // Get an array of note IDs closed during this session.
-           // Used to populate `closed:note` changeset tag
-           getClosedIDs: function() {
-               return Object.keys(_noteCache.closed).sort();
+             if (node.loc !== toLoc) {
+               graph = graph.replace(node.move(toLoc));
+             }

            }
 
            }
 

-       };
-
-       var apibase$3 = 'https://wiki.openstreetmap.org/w/api.php';
-       var _inflight$1 = {};
-       var _wikibaseCache = {};
-       var _localeIDs = { en: false };
+           return actionConnect(nodeIDs)(graph);
+         };

 
 

+         action.disabled = function (graph) {
+           if (nodeIDs.length < 2) return 'not_eligible';

 
 

-       var debouncedRequest = debounce(request, 500, { leading: false });
+           for (var i = 0; i < nodeIDs.length; i++) {
+             var entity = graph.entity(nodeIDs[i]);
+             if (entity.type !== 'node') return 'not_eligible';
+           }

 
 

-       function request(url, callback) {
-           if (_inflight$1[url]) { return; }
-           var controller = new AbortController();
-           _inflight$1[url] = controller;
+           return actionConnect(nodeIDs).disabled(graph);
+         };

 
 

-           d3_json(url, { signal: controller.signal })
-               .then(function(result) {
-                   delete _inflight$1[url];
-                   if (callback) { callback(null, result); }
-               })
-               .catch(function(err) {
-                   delete _inflight$1[url];
-                   if (err.name === 'AbortError') { return; }
-                   if (callback) { callback(err.message); }
-               });
+         return action;

        }
 
        }
 

-
-       /**
-        * Get the best string value from the descriptions/labels result
-        * Note that if mediawiki doesn't recognize language code, it will return all values.
-        * In that case, fallback to use English.
-        * @param values object - either descriptions or labels
-        * @param langCode String
-        * @returns localized string
-        */
-       function localizedToString(values, langCode) {
-           if (values) {
-               values = values[langCode] || values.en;
-           }
-           return values ? values.value : '';
+       function osmChangeset() {
+         if (!(this instanceof osmChangeset)) {
+           return new osmChangeset().initialize(arguments);
+         } else if (arguments.length) {
+           this.initialize(arguments);
+         }

        }
        }

+       osmEntity.changeset = osmChangeset;
+       osmChangeset.prototype = Object.create(osmEntity.prototype);
+       Object.assign(osmChangeset.prototype, {
+         type: 'changeset',
+         extent: function extent() {
+           return new geoExtent();
+         },
+         geometry: function geometry() {
+           return 'changeset';
+         },
+         asJXON: function asJXON() {
+           return {
+             osm: {
+               changeset: {
+                 tag: Object.keys(this.tags).map(function (k) {
+                   return {
+                     '@k': k,
+                     '@v': this.tags[k]
+                   };
+                 }, this),
+                 '@version': 0.6,
+                 '@generator': 'iD'
+               }
+             }
+           };
+         },
+         // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
+         // XML. Returns a string.
+         osmChangeJXON: function osmChangeJXON(changes) {
+           var changeset_id = this.id;
+
+           function nest(x, order) {
+             var groups = {};
+
+             for (var i = 0; i < x.length; i++) {
+               var tagName = Object.keys(x[i])[0];
+               if (!groups[tagName]) groups[tagName] = [];
+               groups[tagName].push(x[i][tagName]);
+             }

 
 

+             var ordered = {};
+             order.forEach(function (o) {
+               if (groups[o]) ordered[o] = groups[o];
+             });
+             return ordered;
+           } // sort relations in a changeset by dependencies

 
 

-       var serviceOsmWikibase = {

 
 

-           init: function() {
-               _inflight$1 = {};
-               _wikibaseCache = {};
-               _localeIDs = {};
-           },
+           function sort(changes) {
+             // find a referenced relation in the current changeset
+             function resolve(item) {
+               return relations.find(function (relation) {
+                 return item.keyAttributes.type === 'relation' && item.keyAttributes.ref === relation['@id'];
+               });
+             } // a new item is an item that has not been already processed

 
 
 
 

-           reset: function() {
-               Object.values(_inflight$1).forEach(function(controller) { controller.abort(); });
-               _inflight$1 = {};
-           },
+             function isNew(item) {
+               return !sorted[item['@id']] && !processing.find(function (proc) {
+                 return proc['@id'] === item['@id'];
+               });
+             }

 
 

+             var processing = [];
+             var sorted = {};
+             var relations = changes.relation;
+             if (!relations) return changes;

 
 

-           /**
-            * Get the best value for the property, or undefined if not found
-            * @param entity object from wikibase
-            * @param property string e.g. 'P4' for image
-            * @param langCode string e.g. 'fr' for French
-            */
-           claimToValue: function(entity, property, langCode) {
-               if (!entity.claims[property]) { return undefined; }
-               var locale = _localeIDs[langCode];
-               var preferredPick, localePick;
-
-               entity.claims[property].forEach(function(stmt) {
-                   // If exists, use value limited to the needed language (has a qualifier P26 = locale)
-                   // Or if not found, use the first value with the "preferred" rank
-                   if (!preferredPick && stmt.rank === 'preferred') {
-                       preferredPick = stmt;
-                   }
-                   if (locale && stmt.qualifiers && stmt.qualifiers.P26 &&
-                       stmt.qualifiers.P26[0].datavalue.value.id === locale
-                   ) {
-                       localePick = stmt;
-                   }
-               });
+             for (var i = 0; i < relations.length; i++) {
+               var relation = relations[i]; // skip relation if already sorted

 
 

-               var result = localePick || preferredPick;
-               if (result) {
-                   var datavalue = result.mainsnak.datavalue;
-                   return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
-               } else {
-                   return undefined;
+               if (!sorted[relation['@id']]) {
+                 processing.push(relation);

                }
                }

-           },

 
 

+               while (processing.length > 0) {
+                 var next = processing[0],
+                     deps = next.member.map(resolve).filter(Boolean).filter(isNew);

 
 

-           /**
-            * Convert monolingual property into a key-value object (language -> value)
-            * @param entity object from wikibase
-            * @param property string e.g. 'P31' for monolingual wiki page title
-            */
-           monolingualClaimToValueObj: function(entity, property) {
-               if (!entity || !entity.claims[property]) { return undefined; }
-
-               return entity.claims[property].reduce(function(acc, obj) {
-                   var value = obj.mainsnak.datavalue.value;
-                   acc[value.language] = value.text;
-                   return acc;
-               }, {});
-           },
+                 if (deps.length === 0) {
+                   sorted[next['@id']] = next;
+                   processing.shift();
+                 } else {
+                   processing = deps.concat(processing);
+                 }
+               }
+             }

 
 

+             changes.relation = Object.values(sorted);
+             return changes;
+           }

 
 

-           toSitelink: function(key, value) {
-               var result = value ? ('Tag:' + key + '=' + value) : 'Key:' + key;
-               return result.replace(/_/g, ' ').trim();
-           },
+           function rep(entity) {
+             return entity.asJXON(changeset_id);
+           }

 
 

+           return {
+             osmChange: {
+               '@version': 0.6,
+               '@generator': 'iD',
+               'create': sort(nest(changes.created.map(rep), ['node', 'way', 'relation'])),
+               'modify': nest(changes.modified.map(rep), ['node', 'way', 'relation']),
+               'delete': Object.assign(nest(changes.deleted.map(rep), ['relation', 'way', 'node']), {
+                 '@if-unused': true
+               })
+             }
+           };
+         },
+         asGeoJSON: function asGeoJSON() {
+           return {};
+         }
+       });

 
 

-           //
-           // Pass params object of the form:
-           // {
-           //   key: 'string',
-           //   value: 'string',
-           //   rtype: 'string',
-           //   langCode: 'string'
-           // }
-           //
-           getEntity: function(params, callback) {
-               var doRequest = params.debounce ? debouncedRequest : request;
-               var that = this;
-               var titles = [];
-               var result = {};
-               var rtypeSitelink = params.rtype ? ('Relation:' + params.rtype).replace(/_/g, ' ').trim() : false;
-               var keySitelink = params.key ? this.toSitelink(params.key) : false;
-               var tagSitelink = (params.key && params.value) ? this.toSitelink(params.key, params.value) : false;
-               var localeSitelink;
-
-               if (params.langCode && _localeIDs[params.langCode] === undefined) {
-                   // If this is the first time we are asking about this locale,
-                   // fetch corresponding entity (if it exists), and cache it.
-                   // If there is no such entry, cache `false` value to avoid re-requesting it.
-                   localeSitelink = ('Locale:' + params.langCode).replace(/_/g, ' ').trim();
-                   titles.push(localeSitelink);
-               }
-
-               if (rtypeSitelink) {
-                   if (_wikibaseCache[rtypeSitelink]) {
-                       result.rtype = _wikibaseCache[rtypeSitelink];
-                   } else {
-                       titles.push(rtypeSitelink);
-                   }
-               }
+       function osmNote() {
+         if (!(this instanceof osmNote)) {
+           return new osmNote().initialize(arguments);
+         } else if (arguments.length) {
+           this.initialize(arguments);
+         }
+       }

 
 

-               if (keySitelink) {
-                   if (_wikibaseCache[keySitelink]) {
-                       result.key = _wikibaseCache[keySitelink];
-                   } else {
-                       titles.push(keySitelink);
-                   }
-               }
+       osmNote.id = function () {
+         return osmNote.id.next--;
+       };

 
 

-               if (tagSitelink) {
-                   if (_wikibaseCache[tagSitelink]) {
-                       result.tag = _wikibaseCache[tagSitelink];
-                   } else {
-                       titles.push(tagSitelink);
-                   }
+       osmNote.id.next = -1;
+       Object.assign(osmNote.prototype, {
+         type: 'note',
+         initialize: function initialize(sources) {
+           for (var i = 0; i < sources.length; ++i) {
+             var source = sources[i];
+
+             for (var prop in source) {
+               if (Object.prototype.hasOwnProperty.call(source, prop)) {
+                 if (source[prop] === undefined) {
+                   delete this[prop];
+                 } else {
+                   this[prop] = source[prop];
+                 }

                }
                }

+             }
+           }

 
 

-               if (!titles.length) {
-                   // Nothing to do, we already had everything in the cache
-                   return callback(null, result);
-               }
-
-               // Requesting just the user language code
-               // If backend recognizes the code, it will perform proper fallbacks,
-               // and the result will contain the requested code. If not, all values are returned:
-               // {"zh-tw":{"value":"...","language":"zh-tw","source-language":"zh-hant"}
-               // {"pt-br":{"value":"...","language":"pt","for-language":"pt-br"}}
-               var obj = {
-                   action: 'wbgetentities',
-                   sites: 'wiki',
-                   titles: titles.join('|'),
-                   languages: params.langCode,
-                   languagefallback: 1,
-                   origin: '*',
-                   format: 'json',
-                   // There is an MW Wikibase API bug https://phabricator.wikimedia.org/T212069
-                   // We shouldn't use v1 until it gets fixed, but should switch to it afterwards
-                   // formatversion: 2,
-               };
+           if (!this.id) {
+             this.id = osmNote.id().toString();
+           }

 
 

-               var url = apibase$3 + '?' + utilQsString(obj);
-               doRequest(url, function(err, d) {
-                   if (err) {
-                       callback(err);
-                   } else if (!d.success || d.error) {
-                       callback(d.error.messages.map(function(v) { return v.html['*']; }).join('<br>'));
-                   } else {
-                       var localeID = false;
-                       Object.values(d.entities).forEach(function(res) {
-                           if (res.missing !== '') {
-                               // Simplify access to the localized values
-                               res.description = localizedToString(res.descriptions, params.langCode);
-                               res.label = localizedToString(res.labels, params.langCode);
-
-                               var title = res.sitelinks.wiki.title;
-                               if (title === rtypeSitelink) {
-                                   _wikibaseCache[rtypeSitelink] = res;
-                                   result.rtype = res;
-                               } else if (title === keySitelink) {
-                                   _wikibaseCache[keySitelink] = res;
-                                   result.key = res;
-                               } else if (title === tagSitelink) {
-                                   _wikibaseCache[tagSitelink] = res;
-                                   result.tag = res;
-                               } else if (title === localeSitelink) {
-                                   localeID = res.id;
-                               } else {
-                                   console.log('Unexpected title ' + title);  // eslint-disable-line no-console
-                               }
-                           }
-                       });
+           return this;
+         },
+         extent: function extent() {
+           return new geoExtent(this.loc);
+         },
+         update: function update(attrs) {
+           return osmNote(this, attrs); // {v: 1 + (this.v || 0)}
+         },
+         isNew: function isNew() {
+           return this.id < 0;
+         },
+         move: function move(loc) {
+           return this.update({
+             loc: loc
+           });
+         }
+       });

 
 

-                       if (localeSitelink) {
-                           // If locale ID is not found, store false to prevent repeated queries
-                           that.addLocale(params.langCode, localeID);
-                       }
+       function osmRelation() {
+         if (!(this instanceof osmRelation)) {
+           return new osmRelation().initialize(arguments);
+         } else if (arguments.length) {
+           this.initialize(arguments);
+         }
+       }
+       osmEntity.relation = osmRelation;
+       osmRelation.prototype = Object.create(osmEntity.prototype);

 
 

-                       callback(null, result);
-                   }
-               });
-           },
+       osmRelation.creationOrder = function (a, b) {
+         var aId = parseInt(osmEntity.id.toOSM(a.id), 10);
+         var bId = parseInt(osmEntity.id.toOSM(b.id), 10);
+         if (aId < 0 || bId < 0) return aId - bId;
+         return bId - aId;
+       };

 
 

+       Object.assign(osmRelation.prototype, {
+         type: 'relation',
+         members: [],
+         copy: function copy(resolver, copies) {
+           if (copies[this.id]) return copies[this.id];
+           var copy = osmEntity.prototype.copy.call(this, resolver, copies);
+           var members = this.members.map(function (member) {
+             return Object.assign({}, member, {
+               id: resolver.entity(member.id).copy(resolver, copies).id
+             });
+           });
+           copy = copy.update({
+             members: members
+           });
+           copies[this.id] = copy;
+           return copy;
+         },
+         extent: function extent(resolver, memo) {
+           return resolver["transient"](this, 'extent', function () {
+             if (memo && memo[this.id]) return geoExtent();
+             memo = memo || {};
+             memo[this.id] = true;
+             var extent = geoExtent();

 
 

-           //
-           // Pass params object of the form:
-           // {
-           //   key: 'string',     // required
-           //   value: 'string'    // optional
-           // }
-           //   -or-
-           // {
-           //   rtype: 'rtype'     // relation type  (e.g. 'multipolygon')
-           // }
-           //
-           // Get an result object used to display tag documentation
-           // {
-           //   title:        'string',
-           //   description:  'string',
-           //   editURL:      'string',
-           //   imageURL:     'string',
-           //   wiki:         { title: 'string', text: 'string', url: 'string' }
-           // }
-           //
-           getDocs: function(params, callback) {
-               var that = this;
-               var langCode = _mainLocalizer.localeCode().toLowerCase();
-               params.langCode = langCode;
+             for (var i = 0; i < this.members.length; i++) {
+               var member = resolver.hasEntity(this.members[i].id);

 
 

-               this.getEntity(params, function(err, data) {
-                   if (err) {
-                       callback(err);
-                       return;
-                   }
+               if (member) {
+                 extent._extend(member.extent(resolver, memo));
+               }
+             }

 
 

-                   var entity = data.rtype || data.tag || data.key;
-                   if (!entity) {
-                       callback('No entity');
-                       return;
-                   }
+             return extent;
+           });
+         },
+         geometry: function geometry(graph) {
+           return graph["transient"](this, 'geometry', function () {
+             return this.isMultipolygon() ? 'area' : 'relation';
+           });
+         },
+         isDegenerate: function isDegenerate() {
+           return this.members.length === 0;
+         },
+         // Return an array of members, each extended with an 'index' property whose value
+         // is the member index.
+         indexedMembers: function indexedMembers() {
+           var result = new Array(this.members.length);
+
+           for (var i = 0; i < this.members.length; i++) {
+             result[i] = Object.assign({}, this.members[i], {
+               index: i
+             });
+           }

 
 

-                   // prepare result
-                   var result = {
-                       title: entity.title,
-                       description: entity.description,
-                       editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
-                   };
+           return result;
+         },
+         // Return the first member with the given role. A copy of the member object
+         // is returned, extended with an 'index' property whose value is the member index.
+         memberByRole: function memberByRole(role) {
+           for (var i = 0; i < this.members.length; i++) {
+             if (this.members[i].role === role) {
+               return Object.assign({}, this.members[i], {
+                 index: i
+               });
+             }
+           }
+         },
+         // Same as memberByRole, but returns all members with the given role
+         membersByRole: function membersByRole(role) {
+           var result = [];

 
 

-                   // add image
-                   if (entity.claims) {
-                       var imageroot;
-                       var image = that.claimToValue(entity, 'P4', langCode);
-                       if (image) {
-                           imageroot = 'https://commons.wikimedia.org/w/index.php';
-                       } else {
-                           image = that.claimToValue(entity, 'P28', langCode);
-                           if (image) {
-                               imageroot = 'https://wiki.openstreetmap.org/w/index.php';
-                           }
-                       }
-                       if (imageroot && image) {
-                           result.imageURL = imageroot + '?' + utilQsString({
-                               title: 'Special:Redirect/file/' + image,
-                               width: 400
-                           });
-                       }
-                   }
+           for (var i = 0; i < this.members.length; i++) {
+             if (this.members[i].role === role) {
+               result.push(Object.assign({}, this.members[i], {
+                 index: i
+               }));
+             }
+           }

 
 

-                   // Try to get a wiki page from tag data item first, followed by the corresponding key data item.
-                   // If neither tag nor key data item contain a wiki page in the needed language nor English,
-                   // get the first found wiki page from either the tag or the key item.
-                   var rtypeWiki = that.monolingualClaimToValueObj(data.rtype, 'P31');
-                   var tagWiki = that.monolingualClaimToValueObj(data.tag, 'P31');
-                   var keyWiki = that.monolingualClaimToValueObj(data.key, 'P31');
-
-                   // If exact language code does not exist, try to find the first part before the '-'
-                   // BUG: in some cases, a more elaborate fallback logic might be needed
-                   var langPrefix = langCode.split('-', 2)[0];
-
-                   // use the first acceptable wiki page
-                   result.wiki =
-                       getWikiInfo(rtypeWiki, langCode, 'inspector.wiki_reference') ||
-                       getWikiInfo(rtypeWiki, langPrefix, 'inspector.wiki_reference') ||
-                       getWikiInfo(rtypeWiki, 'en', 'inspector.wiki_en_reference') ||
-                       getWikiInfo(tagWiki, langCode, 'inspector.wiki_reference') ||
-                       getWikiInfo(tagWiki, langPrefix, 'inspector.wiki_reference') ||
-                       getWikiInfo(tagWiki, 'en', 'inspector.wiki_en_reference') ||
-                       getWikiInfo(keyWiki, langCode, 'inspector.wiki_reference') ||
-                       getWikiInfo(keyWiki, langPrefix, 'inspector.wiki_reference') ||
-                       getWikiInfo(keyWiki, 'en', 'inspector.wiki_en_reference');
-
-                   callback(null, result);
-
-
-                   // Helper method to get wiki info if a given language exists
-                   function getWikiInfo(wiki, langCode, tKey) {
-                       if (wiki && wiki[langCode]) {
-                           return {
-                               title: wiki[langCode],
-                               text: tKey,
-                               url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
-                           };
-                       }
-                   }
+           return result;
+         },
+         // Return the first member with the given id. A copy of the member object
+         // is returned, extended with an 'index' property whose value is the member index.
+         memberById: function memberById(id) {
+           for (var i = 0; i < this.members.length; i++) {
+             if (this.members[i].id === id) {
+               return Object.assign({}, this.members[i], {
+                 index: i

                });
                });

-           },
-
+             }
+           }
+         },
+         // Return the first member with the given id and role. A copy of the member object
+         // is returned, extended with an 'index' property whose value is the member index.
+         memberByIdAndRole: function memberByIdAndRole(id, role) {
+           for (var i = 0; i < this.members.length; i++) {
+             if (this.members[i].id === id && this.members[i].role === role) {
+               return Object.assign({}, this.members[i], {
+                 index: i
+               });
+             }
+           }
+         },
+         addMember: function addMember(member, index) {
+           var members = this.members.slice();
+           members.splice(index === undefined ? members.length : index, 0, member);
+           return this.update({
+             members: members
+           });
+         },
+         updateMember: function updateMember(member, index) {
+           var members = this.members.slice();
+           members.splice(index, 1, Object.assign({}, members[index], member));
+           return this.update({
+             members: members
+           });
+         },
+         removeMember: function removeMember(index) {
+           var members = this.members.slice();
+           members.splice(index, 1);
+           return this.update({
+             members: members
+           });
+         },
+         removeMembersWithID: function removeMembersWithID(id) {
+           var members = this.members.filter(function (m) {
+             return m.id !== id;
+           });
+           return this.update({
+             members: members
+           });
+         },
+         moveMember: function moveMember(fromIndex, toIndex) {
+           var members = this.members.slice();
+           members.splice(toIndex, 0, members.splice(fromIndex, 1)[0]);
+           return this.update({
+             members: members
+           });
+         },
+         // Wherever a member appears with id `needle.id`, replace it with a member
+         // with id `replacement.id`, type `replacement.type`, and the original role,
+         // By default, adding a duplicate member (by id and role) is prevented.
+         // Return an updated relation.
+         replaceMember: function replaceMember(needle, replacement, keepDuplicates) {
+           if (!this.memberById(needle.id)) return this;
+           var members = [];
+
+           for (var i = 0; i < this.members.length; i++) {
+             var member = this.members[i];
+
+             if (member.id !== needle.id) {
+               members.push(member);
+             } else if (keepDuplicates || !this.memberByIdAndRole(replacement.id, member.role)) {
+               members.push({
+                 id: replacement.id,
+                 type: replacement.type,
+                 role: member.role
+               });
+             }
+           }

 
 

-           addLocale: function(langCode, qid) {
-               // Makes it easier to unit test
-               _localeIDs[langCode] = qid;
-           },
+           return this.update({
+             members: members
+           });
+         },
+         asJXON: function asJXON(changeset_id) {
+           var r = {
+             relation: {
+               '@id': this.osmId(),
+               '@version': this.version || 0,
+               member: this.members.map(function (member) {
+                 return {
+                   keyAttributes: {
+                     type: member.type,
+                     role: member.role,
+                     ref: osmEntity.id.toOSM(member.id)
+                   }
+                 };
+               }, this),
+               tag: Object.keys(this.tags).map(function (k) {
+                 return {
+                   keyAttributes: {
+                     k: k,
+                     v: this.tags[k]
+                   }
+                 };
+               }, this)
+             }
+           };

 
 

+           if (changeset_id) {
+             r.relation['@changeset'] = changeset_id;
+           }

 
 

-           apibase: function(val) {
-               if (!arguments.length) { return apibase$3; }
-               apibase$3 = val;
-               return this;
+           return r;
+         },
+         asGeoJSON: function asGeoJSON(resolver) {
+           return resolver["transient"](this, 'GeoJSON', function () {
+             if (this.isMultipolygon()) {
+               return {
+                 type: 'MultiPolygon',
+                 coordinates: this.multipolygon(resolver)
+               };
+             } else {
+               return {
+                 type: 'FeatureCollection',
+                 properties: this.tags,
+                 features: this.members.map(function (member) {
+                   return Object.assign({
+                     role: member.role
+                   }, resolver.entity(member.id).asGeoJSON(resolver));
+                 })
+               };
+             }
+           });
+         },
+         area: function area(resolver) {
+           return resolver["transient"](this, 'area', function () {
+             return d3_geoArea(this.asGeoJSON(resolver));
+           });
+         },
+         isMultipolygon: function isMultipolygon() {
+           return this.tags.type === 'multipolygon';
+         },
+         isComplete: function isComplete(resolver) {
+           for (var i = 0; i < this.members.length; i++) {
+             if (!resolver.hasEntity(this.members[i].id)) {
+               return false;
+             }

            }
 
            }
 

-       };
+           return true;
+         },
+         hasFromViaTo: function hasFromViaTo() {
+           return this.members.some(function (m) {
+             return m.role === 'from';
+           }) && this.members.some(function (m) {
+             return m.role === 'via';
+           }) && this.members.some(function (m) {
+             return m.role === 'to';
+           });
+         },
+         isRestriction: function isRestriction() {
+           return !!(this.tags.type && this.tags.type.match(/^restriction:?/));
+         },
+         isValidRestriction: function isValidRestriction() {
+           if (!this.isRestriction()) return false;
+           var froms = this.members.filter(function (m) {
+             return m.role === 'from';
+           });
+           var vias = this.members.filter(function (m) {
+             return m.role === 'via';
+           });
+           var tos = this.members.filter(function (m) {
+             return m.role === 'to';
+           });
+           if (froms.length !== 1 && this.tags.restriction !== 'no_entry') return false;
+           if (froms.some(function (m) {
+             return m.type !== 'way';
+           })) return false;
+           if (tos.length !== 1 && this.tags.restriction !== 'no_exit') return false;
+           if (tos.some(function (m) {
+             return m.type !== 'way';
+           })) return false;
+           if (vias.length === 0) return false;
+           if (vias.length > 1 && vias.some(function (m) {
+             return m.type !== 'way';
+           })) return false;
+           return true;
+         },
+         isConnectivity: function isConnectivity() {
+           return !!(this.tags.type && this.tags.type.match(/^connectivity:?/));
+         },
+         // Returns an array [A0, ... An], each Ai being an array of node arrays [Nds0, ... Ndsm],
+         // where Nds0 is an outer ring and subsequent Ndsi's (if any i > 0) being inner rings.
+         //
+         // This corresponds to the structure needed for rendering a multipolygon path using a
+         // `evenodd` fill rule, as well as the structure of a GeoJSON MultiPolygon geometry.
+         //
+         // In the case of invalid geometries, this function will still return a result which
+         // includes the nodes of all way members, but some Nds may be unclosed and some inner
+         // rings not matched with the intended outer ring.
+         //
+         multipolygon: function multipolygon(resolver) {
+           var outers = this.members.filter(function (m) {
+             return 'outer' === (m.role || 'outer');
+           });
+           var inners = this.members.filter(function (m) {
+             return 'inner' === m.role;
+           });
+           outers = osmJoinWays(outers, resolver);
+           inners = osmJoinWays(inners, resolver);

 
 

-       var jsonpCache = {};
-       window.jsonpCache = jsonpCache;
+           var sequenceToLineString = function sequenceToLineString(sequence) {
+             if (sequence.nodes.length > 2 && sequence.nodes[0] !== sequence.nodes[sequence.nodes.length - 1]) {
+               // close unclosed parts to ensure correct area rendering - #2945
+               sequence.nodes.push(sequence.nodes[0]);
+             }

 
 

-       function jsonpRequest(url, callback) {
-           var request = {
-               abort: function() {}
+             return sequence.nodes.map(function (node) {
+               return node.loc;
+             });

            };
 
            };
 

-           if (window.JSONP_FIX) {
-               if (window.JSONP_DELAY === 0) {
-                   callback(window.JSONP_FIX);
-               } else {
-                   var t = window.setTimeout(function() {
-                       callback(window.JSONP_FIX);
-                   }, window.JSONP_DELAY || 0);
-
-                   request.abort = function() { window.clearTimeout(t); };
-               }
+           outers = outers.map(sequenceToLineString);
+           inners = inners.map(sequenceToLineString);
+           var result = outers.map(function (o) {
+             // Heuristic for detecting counterclockwise winding order. Assumes
+             // that OpenStreetMap polygons are not hemisphere-spanning.
+             return [d3_geoArea({
+               type: 'Polygon',
+               coordinates: [o]
+             }) > 2 * Math.PI ? o.reverse() : o];
+           });

 
 

-               return request;
-           }
+           function findOuter(inner) {
+             var o, outer;

 
 

-           function rand() {
-               var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
-               var c = '';
-               var i = -1;
-               while (++i < 15) { c += chars.charAt(Math.floor(Math.random() * 52)); }
-               return c;
-           }
+             for (o = 0; o < outers.length; o++) {
+               outer = outers[o];

 
 

-           function create(url) {
-               var e = url.match(/callback=(\w+)/);
-               var c = e ? e[1] : rand();
+               if (geoPolygonContainsPolygon(outer, inner)) {
+                 return o;
+               }
+             }

 
 

-               jsonpCache[c] = function(data) {
-                   if (jsonpCache[c]) {
-                       callback(data);
-                   }
-                   finalize();
-               };
+             for (o = 0; o < outers.length; o++) {
+               outer = outers[o];

 
 

-               function finalize() {
-                   delete jsonpCache[c];
-                   script.remove();
+               if (geoPolygonIntersectsPolygon(outer, inner, false)) {
+                 return o;

                }
                }

-
-               request.abort = finalize;
-               return 'jsonpCache.' + c;
+             }

            }
 
            }
 

-           var cb = create(url);
+           for (var i = 0; i < inners.length; i++) {
+             var inner = inners[i];

 
 

-           var script = select('head')
-               .append('script')
-               .attr('type', 'text/javascript')
-               .attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
+             if (d3_geoArea({
+               type: 'Polygon',
+               coordinates: [inner]
+             }) < 2 * Math.PI) {
+               inner = inner.reverse();
+             }

 
 

-           return request;
-       }
+             var o = findOuter(inners[i]);

 
 

-       var bubbleApi = 'https://dev.virtualearth.net/mapcontrol/HumanScaleServices/GetBubbles.ashx?';
-       var streetsideImagesApi = 'https://t.ssl.ak.tiles.virtualearth.net/tiles/';
-       var bubbleAppKey = 'AuftgJsO0Xs8Ts4M1xZUQJQXJNsvmh3IV8DkNieCiy3tCwCUMq76-WpkrBtNAuEm';
-       var pannellumViewerCSS = 'pannellum-streetside/pannellum.css';
-       var pannellumViewerJS = 'pannellum-streetside/pannellum.js';
-       var maxResults$2 = 2000;
-       var tileZoom$2 = 16.5;
-       var tiler$6 = utilTiler().zoomExtent([tileZoom$2, tileZoom$2]).skipNullIsland(true);
-       var dispatch$7 = dispatch('loadedBubbles', 'viewerChanged');
-       var minHfov = 10;         // zoom in degrees:  20, 10, 5
-       var maxHfov = 90;         // zoom out degrees
-       var defaultHfov = 45;
+             if (o !== undefined) {
+               result[o].push(inners[i]);
+             } else {
+               result.push([inners[i]]); // Invalid geometry
+             }
+           }

 
 

-       var _hires = false;
-       var _resolution = 512;    // higher numbers are slower - 512, 1024, 2048, 4096
-       var _currScene = 0;
-       var _ssCache;
-       var _pannellumViewer;
-       var _sceneOptions;
-       var _dataUrlArray = [];
+           return result;
+         }
+       });

 
 

+       var QAItem = /*#__PURE__*/function () {
+         function QAItem(loc, service, itemType, id, props) {
+           _classCallCheck$1(this, QAItem);

 
 

-       /**
-        * abortRequest().
-        */
-       function abortRequest$6(i) {
-         i.abort();
-       }
+           // Store required properties
+           this.loc = loc;
+           this.service = service.title;
+           this.itemType = itemType; // All issues must have an ID for selection, use generic if none specified

 
 

+           this.id = id ? id : "".concat(QAItem.id());
+           this.update(props); // Some QA services have marker icons to differentiate issues

 
 

-       /**
-        * localeTimeStamp().
-        */
-       function localeTimestamp(s) {
-         if (!s) { return null; }
-         var options = { day: 'numeric', month: 'short', year: 'numeric' };
-         var d = new Date(s);
-         if (isNaN(d.getTime())) { return null; }
-         return d.toLocaleString(_mainLocalizer.localeCode(), options);
-       }
+           if (service && typeof service.getIcon === 'function') {
+             this.icon = service.getIcon(itemType);
+           }
+         }

 
 

+         _createClass$1(QAItem, [{
+           key: "update",
+           value: function update(props) {
+             var _this = this;

 
 

-       /**
-        * loadTiles() wraps the process of generating tiles and then fetching image points for each tile.
-        */
-       function loadTiles$2(which, url, projection, margin) {
-         var tiles = tiler$6.margin(margin).getTiles(projection);
+             // You can't override this initial information
+             var loc = this.loc,
+                 service = this.service,
+                 itemType = this.itemType,
+                 id = this.id;
+             Object.keys(props).forEach(function (prop) {
+               return _this[prop] = props[prop];
+             });
+             this.loc = loc;
+             this.service = service;
+             this.itemType = itemType;
+             this.id = id;
+             return this;
+           } // Generic handling for newly created QAItems

 
 

-         // abort inflight requests that are no longer needed
-         var cache = _ssCache[which];
-         Object.keys(cache.inflight).forEach(function (k) {
-           var wanted = tiles.find(function (tile) { return k.indexOf(tile.id + ',') === 0; });
-           if (!wanted) {
-             abortRequest$6(cache.inflight[k]);
-             delete cache.inflight[k];
+         }], [{
+           key: "id",
+           value: function id() {
+             return this.nextId--;

            }
            }

-         });
-
-         tiles.forEach(function (tile) { return loadNextTilePage$2(which, url, tile); });
-       }
-
+         }]);

 
 

-       /**
-        * loadNextTilePage() load data for the next tile page in line.
-        */
-       function loadNextTilePage$2(which, url, tile) {
-         var cache = _ssCache[which];
-         var nextPage = cache.nextPage[tile.id] || 0;
-         var id = tile.id + ',' + String(nextPage);
-         if (cache.loaded[id] || cache.inflight[id]) { return; }
+         return QAItem;
+       }();
+       QAItem.nextId = -1;

 
 

-         cache.inflight[id] = getBubbles(url, tile, function (bubbles) {
-           cache.loaded[id] = true;
-           delete cache.inflight[id];
-           if (!bubbles) { return; }
+       //
+       // Optionally, split only the given ways, if multiple ways share
+       // the given node.
+       //
+       // This is the inverse of `iD.actionJoin`.
+       //
+       // For testing convenience, accepts an ID to assign to the new way.
+       // Normally, this will be undefined and the way will automatically
+       // be assigned a new ID.
+       //
+       // Reference:
+       //   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/SplitWayAction.as
+       //

 
 

-           // [].shift() removes the first element, some statistics info, not a bubble point
-           bubbles.shift();
+       function actionSplit(nodeIds, newWayIds) {
+         // accept single ID for backwards-compatiblity
+         if (typeof nodeIds === 'string') nodeIds = [nodeIds];

 
 

-           var features = bubbles.map(function (bubble) {
-             if (cache.points[bubble.id]) { return null; }  // skip duplicates
+         var _wayIDs; // the strategy for picking which way will have a new version and which way is newly created

 
 

-             var loc = [bubble.lo, bubble.la];
-             var d = {
-               loc: loc,
-               key: bubble.id,
-               ca: bubble.he,
-               captured_at: bubble.cd,
-               captured_by: 'microsoft',
-               // nbn: bubble.nbn,
-               // pbn: bubble.pbn,
-               // ad: bubble.ad,
-               // rn: bubble.rn,
-               pr: bubble.pr,  // previous
-               ne: bubble.ne,  // next
-               pano: true,
-               sequenceKey: null
-             };

 
 

-             cache.points[bubble.id] = d;
+         var _keepHistoryOn = 'longest'; // 'longest', 'first'
+         // The IDs of the ways actually created by running this action

 
 

-             // a sequence starts here
-             if (bubble.pr === undefined) {
-               cache.leaders.push(bubble.id);
-             }
+         var _createdWayIDs = [];

 
 

-             return {
-               minX: loc[0], minY: loc[1], maxX: loc[0], maxY: loc[1], data: d
-             };
+         function dist(graph, nA, nB) {
+           var locA = graph.entity(nA).loc;
+           var locB = graph.entity(nB).loc;
+           var epsilon = 1e-6;
+           return locA && locB ? geoSphericalDistance(locA, locB) : epsilon;
+         } // If the way is closed, we need to search for a partner node
+         // to split the way at.
+         //
+         // The following looks for a node that is both far away from
+         // the initial node in terms of way segment length and nearby
+         // in terms of beeline-distance. This assures that areas get
+         // split on the most "natural" points (independent of the number
+         // of nodes).
+         // For example: bone-shaped areas get split across their waist
+         // line, circles across the diameter.
+
+
+         function splitArea(nodes, idxA, graph) {
+           var lengths = new Array(nodes.length);
+           var length;
+           var i;
+           var best = 0;
+           var idxB;

 
 

-           }).filter(Boolean);
+           function wrap(index) {
+             return utilWrap(index, nodes.length);
+           } // calculate lengths

 
 

-           cache.rtree.load(features);

 
 

-           connectSequences();
+           length = 0;

 
 

-           if (which === 'bubbles') {
-             dispatch$7.call('loadedBubbles');
+           for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
+             length += dist(graph, nodes[i], nodes[wrap(i - 1)]);
+             lengths[i] = length;

            }
            }

-         });
-       }
-
-
-       // call this sometimes to connect the bubbles into sequences
-       function connectSequences() {
-         var cache = _ssCache.bubbles;
-         var keepLeaders = [];
-
-         for (var i = 0; i < cache.leaders.length; i++) {
-           var bubble = cache.points[cache.leaders[i]];
-           var seen = {};

 
 

-           // try to make a sequence.. use the key of the leader bubble.
-           var sequence = { key: bubble.key, bubbles: [] };
-           var complete = false;
+           length = 0;

 
 

-           do {
-             sequence.bubbles.push(bubble);
-             seen[bubble.key] = true;
+           for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
+             length += dist(graph, nodes[i], nodes[wrap(i + 1)]);

 
 

-             if (bubble.ne === undefined) {
-               complete = true;
-             } else {
-               bubble = cache.points[bubble.ne];  // advance to next
+             if (length < lengths[i]) {
+               lengths[i] = length;

              }
              }

-           } while (bubble && !seen[bubble.key] && !complete);
+           } // determine best opposite node to split

 
 
 
 

-           if (complete) {
-             _ssCache.sequences[sequence.key] = sequence;
+           for (i = 0; i < nodes.length; i++) {
+             var cost = lengths[i] / dist(graph, nodes[idxA], nodes[i]);

 
 

-             // assign bubbles to the sequence
-             for (var j = 0; j < sequence.bubbles.length; j++) {
-               sequence.bubbles[j].sequenceKey = sequence.key;
+             if (cost > best) {
+               idxB = i;
+               best = cost;

              }
              }

+           }

 
 

-             // create a GeoJSON LineString
-             sequence.geojson = {
-               type: 'LineString',
-               properties: { key: sequence.key },
-               coordinates: sequence.bubbles.map(function (d) { return d.loc; })
-             };
+           return idxB;
+         }

 
 

-           } else {
-             keepLeaders.push(cache.leaders[i]);
+         function totalLengthBetweenNodes(graph, nodes) {
+           var totalLength = 0;
+
+           for (var i = 0; i < nodes.length - 1; i++) {
+             totalLength += dist(graph, nodes[i], nodes[i + 1]);

            }
            }

+
+           return totalLength;

          }
 
          }
 

-         // couldn't complete these, save for later
-         cache.leaders = keepLeaders;
-       }
+         function split(graph, nodeId, wayA, newWayId) {
+           var wayB = osmWay({
+             id: newWayId,
+             tags: wayA.tags
+           }); // `wayB` is the NEW way

 
 

+           var origNodes = wayA.nodes.slice();
+           var nodesA;
+           var nodesB;
+           var isArea = wayA.isArea();
+           var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);

 
 

-       /**
-        * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
-        */
-       function getBubbles(url, tile, callback) {
-         var rect = tile.extent.rectangle();
-         var urlForRequest = url + utilQsString({
-           n: rect[3],
-           s: rect[1],
-           e: rect[2],
-           w: rect[0],
-           c: maxResults$2,
-           appkey: bubbleAppKey,
-           jsCallback: '{callback}'
-         });
+           if (wayA.isClosed()) {
+             var nodes = wayA.nodes.slice(0, -1);
+             var idxA = nodes.indexOf(nodeId);
+             var idxB = splitArea(nodes, idxA, graph);

 
 

-         return jsonpRequest(urlForRequest, function (data) {
-           if (!data || data.error) {
-             callback(null);
+             if (idxB < idxA) {
+               nodesA = nodes.slice(idxA).concat(nodes.slice(0, idxB + 1));
+               nodesB = nodes.slice(idxB, idxA + 1);
+             } else {
+               nodesA = nodes.slice(idxA, idxB + 1);
+               nodesB = nodes.slice(idxB).concat(nodes.slice(0, idxA + 1));
+             }

            } else {
            } else {

-             callback(data);
+             var idx = wayA.nodes.indexOf(nodeId, 1);
+             nodesA = wayA.nodes.slice(0, idx + 1);
+             nodesB = wayA.nodes.slice(idx);

            }
            }

-         });
-       }

 
 

+           var lengthA = totalLengthBetweenNodes(graph, nodesA);
+           var lengthB = totalLengthBetweenNodes(graph, nodesB);

 
 

-       // partition viewport into higher zoom tiles
-       function partitionViewport$2(projection) {
-         var z = geoScaleToZoom(projection.scale());
-         var z2 = (Math.ceil(z * 2) / 2) + 2.5;   // round to next 0.5 and add 2.5
-         var tiler = utilTiler().zoomExtent([z2, z2]);
+           if (_keepHistoryOn === 'longest' && lengthB > lengthA) {
+             // keep the history on the longer way, regardless of the node count
+             wayA = wayA.update({
+               nodes: nodesB
+             });
+             wayB = wayB.update({
+               nodes: nodesA
+             });
+             var temp = lengthA;
+             lengthA = lengthB;
+             lengthB = temp;
+           } else {
+             wayA = wayA.update({
+               nodes: nodesA
+             });
+             wayB = wayB.update({
+               nodes: nodesB
+             });
+           }

 
 

-         return tiler.getTiles(projection)
-           .map(function (tile) { return tile.extent; });
-       }
+           if (wayA.tags.step_count) {
+             // divide up the the step count proportionally between the two ways
+             var stepCount = parseFloat(wayA.tags.step_count);
+
+             if (stepCount && // ensure a number
+             isFinite(stepCount) && // ensure positive
+             stepCount > 0 && // ensure integer
+             Math.round(stepCount) === stepCount) {
+               var tagsA = Object.assign({}, wayA.tags);
+               var tagsB = Object.assign({}, wayB.tags);
+               var ratioA = lengthA / (lengthA + lengthB);
+               var countA = Math.round(stepCount * ratioA);
+               tagsA.step_count = countA.toString();
+               tagsB.step_count = (stepCount - countA).toString();
+               wayA = wayA.update({
+                 tags: tagsA
+               });
+               wayB = wayB.update({
+                 tags: tagsB
+               });
+             }
+           }

 
 

+           graph = graph.replace(wayA);
+           graph = graph.replace(wayB);
+           graph.parentRelations(wayA).forEach(function (relation) {
+             var member; // Turn restrictions - make sure:
+             // 1. Splitting a FROM/TO way - only `wayA` OR `wayB` remains in relation
+             //    (whichever one is connected to the VIA node/ways)
+             // 2. Splitting a VIA way - `wayB` remains in relation as a VIA way

 
 

-       // no more than `limit` results per partition.
-       function searchLimited$2(limit, projection, rtree) {
-         limit = limit || 5;
+             if (relation.hasFromViaTo()) {
+               var f = relation.memberByRole('from');
+               var v = relation.membersByRole('via');
+               var t = relation.memberByRole('to');
+               var i; // 1. split a FROM/TO

 
 

-         return partitionViewport$2(projection)
-           .reduce(function (result, extent) {
-             var found = rtree.search(extent.bbox())
-               .slice(0, limit)
-               .map(function (d) { return d.data; });
+               if (f.id === wayA.id || t.id === wayA.id) {
+                 var keepB = false;

 
 

-             return (found.length ? result.concat(found) : result);
-           }, []);
-       }
+                 if (v.length === 1 && v[0].type === 'node') {
+                   // check via node
+                   keepB = wayB.contains(v[0].id);
+                 } else {
+                   // check via way(s)
+                   for (i = 0; i < v.length; i++) {
+                     if (v[i].type === 'way') {
+                       var wayVia = graph.hasEntity(v[i].id);
+
+                       if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
+                         keepB = true;
+                         break;
+                       }
+                     }
+                   }
+                 }

 
 

+                 if (keepB) {
+                   relation = relation.replaceMember(wayA, wayB);
+                   graph = graph.replace(relation);
+                 } // 2. split a VIA

 
 

-       /**
-        * loadImage()
-        */
-       function loadImage(imgInfo) {
-         return new Promise(function (resolve) {
-           var img = new Image();
-           img.onload = function () {
-             var canvas = document.getElementById('ideditor-canvas' + imgInfo.face);
-             var ctx = canvas.getContext('2d');
-             ctx.drawImage(img, imgInfo.x, imgInfo.y);
-             resolve({ imgInfo: imgInfo, status: 'ok' });
-           };
-           img.onerror = function () {
-             resolve({ data: imgInfo, status: 'error' });
-           };
-           img.setAttribute('crossorigin', '');
-           img.src = imgInfo.url;
-         });
-       }
+               } else {
+                 for (i = 0; i < v.length; i++) {
+                   if (v[i].type === 'way' && v[i].id === wayA.id) {
+                     member = {
+                       id: wayB.id,
+                       type: 'way',
+                       role: 'via'
+                     };
+                     graph = actionAddMember(relation.id, member, v[i].index + 1)(graph);
+                     break;
+                   }
+                 }
+               } // All other relations (Routes, Multipolygons, etc):
+               // 1. Both `wayA` and `wayB` remain in the relation
+               // 2. But must be inserted as a pair (see `actionAddMember` for details)

 
 

+             } else {
+               if (relation === isOuter) {
+                 graph = graph.replace(relation.mergeTags(wayA.tags));
+                 graph = graph.replace(wayA.update({
+                   tags: {}
+                 }));
+                 graph = graph.replace(wayB.update({
+                   tags: {}
+                 }));
+               }

 
 

-       /**
-        * loadCanvas()
-        */
-       function loadCanvas(imageGroup) {
-         return Promise.all(imageGroup.map(loadImage))
-           .then(function (data) {
-             var canvas = document.getElementById('ideditor-canvas' + data[0].imgInfo.face);
-             var which = { '01': 0, '02': 1, '03': 2, '10': 3, '11': 4, '12': 5 };
-             var face = data[0].imgInfo.face;
-             _dataUrlArray[which[face]] = canvas.toDataURL('image/jpeg', 1.0);
-             return { status: 'loadCanvas for face ' + data[0].imgInfo.face + 'ok'};
+               member = {
+                 id: wayB.id,
+                 type: 'way',
+                 role: relation.memberById(wayA.id).role
+               };
+               var insertPair = {
+                 originalID: wayA.id,
+                 insertedID: wayB.id,
+                 nodes: origNodes
+               };
+               graph = actionAddMember(relation.id, member, undefined, insertPair)(graph);
+             }

            });
            });

-       }

 
 

+           if (!isOuter && isArea) {
+             var multipolygon = osmRelation({
+               tags: Object.assign({}, wayA.tags, {
+                 type: 'multipolygon'
+               }),
+               members: [{
+                 id: wayA.id,
+                 role: 'outer',
+                 type: 'way'
+               }, {
+                 id: wayB.id,
+                 role: 'outer',
+                 type: 'way'
+               }]
+             });
+             graph = graph.replace(multipolygon);
+             graph = graph.replace(wayA.update({
+               tags: {}
+             }));
+             graph = graph.replace(wayB.update({
+               tags: {}
+             }));
+           }

 
 

-       /**
-        * loadFaces()
-        */
-       function loadFaces(faceGroup) {
-         return Promise.all(faceGroup.map(loadCanvas))
-           .then(function () { return { status: 'loadFaces done' }; });
-       }
-
+           _createdWayIDs.push(wayB.id);

 
 

-       function setupCanvas(selection, reset) {
-         if (reset) {
-           selection.selectAll('#ideditor-stitcher-canvases')
-             .remove();
+           return graph;

          }
 
          }
 

-         // Add the Streetside working canvases. These are used for 'stitching', or combining,
-         // multiple images for each of the six faces, before passing to the Pannellum control as DataUrls
-         selection.selectAll('#ideditor-stitcher-canvases')
-           .data([0])
-           .enter()
-           .append('div')
-           .attr('id', 'ideditor-stitcher-canvases')
-           .attr('display', 'none')
-           .selectAll('canvas')
-           .data(['canvas01', 'canvas02', 'canvas03', 'canvas10', 'canvas11', 'canvas12'])
-           .enter()
-           .append('canvas')
-           .attr('id', function (d) { return 'ideditor-' + d; })
-           .attr('width', _resolution)
-           .attr('height', _resolution);
-       }
-
+         var action = function action(graph) {
+           _createdWayIDs = [];
+           var newWayIndex = 0;

 
 

-       function qkToXY(qk) {
-         var x = 0;
-         var y = 0;
-         var scale = 256;
-         for (var i = qk.length; i > 0; i--) {
-           var key = qk[i-1];
-           x += (+(key === '1' || key === '3')) * scale;
-           y += (+(key === '2' || key === '3')) * scale;
-           scale *= 2;
-         }
-         return [x, y];
-       }
+           for (var i = 0; i < nodeIds.length; i++) {
+             var nodeId = nodeIds[i];
+             var candidates = action.waysForNode(nodeId, graph);

 
 

+             for (var j = 0; j < candidates.length; j++) {
+               graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
+               newWayIndex += 1;
+             }
+           }

 
 

-       function getQuadKeys() {
-         var dim = _resolution / 256;
-         var quadKeys;
+           return graph;
+         };

 
 

-         if (dim === 16) {
-           quadKeys = [
-             '0000','0001','0010','0011','0100','0101','0110','0111',  '1000','1001','1010','1011','1100','1101','1110','1111',
-             '0002','0003','0012','0013','0102','0103','0112','0113',  '1002','1003','1012','1013','1102','1103','1112','1113',
-             '0020','0021','0030','0031','0120','0121','0130','0131',  '1020','1021','1030','1031','1120','1121','1130','1131',
-             '0022','0023','0032','0033','0122','0123','0132','0133',  '1022','1023','1032','1033','1122','1123','1132','1133',
-             '0200','0201','0210','0211','0300','0301','0310','0311',  '1200','1201','1210','1211','1300','1301','1310','1311',
-             '0202','0203','0212','0213','0302','0303','0312','0313',  '1202','1203','1212','1213','1302','1303','1312','1313',
-             '0220','0221','0230','0231','0320','0321','0330','0331',  '1220','1221','1230','1231','1320','1321','1330','1331',
-             '0222','0223','0232','0233','0322','0323','0332','0333',  '1222','1223','1232','1233','1322','1323','1332','1333',
-
-             '2000','2001','2010','2011','2100','2101','2110','2111',  '3000','3001','3010','3011','3100','3101','3110','3111',
-             '2002','2003','2012','2013','2102','2103','2112','2113',  '3002','3003','3012','3013','3102','3103','3112','3113',
-             '2020','2021','2030','2031','2120','2121','2130','2131',  '3020','3021','3030','3031','3120','3121','3130','3131',
-             '2022','2023','2032','2033','2122','2123','2132','2133',  '3022','3023','3032','3033','3122','3123','3132','3133',
-             '2200','2201','2210','2211','2300','2301','2310','2311',  '3200','3201','3210','3211','3300','3301','3310','3311',
-             '2202','2203','2212','2213','2302','2303','2312','2313',  '3202','3203','3212','3213','3302','3303','3312','3313',
-             '2220','2221','2230','2231','2320','2321','2330','2331',  '3220','3221','3230','3231','3320','3321','3330','3331',
-             '2222','2223','2232','2233','2322','2323','2332','2333',  '3222','3223','3232','3233','3322','3323','3332','3333'
-           ];
+         action.getCreatedWayIDs = function () {
+           return _createdWayIDs;
+         };

 
 

-         } else if (dim === 8) {
-           quadKeys = [
-             '000','001','010','011',  '100','101','110','111',
-             '002','003','012','013',  '102','103','112','113',
-             '020','021','030','031',  '120','121','130','131',
-             '022','023','032','033',  '122','123','132','133',
-
-             '200','201','210','211',  '300','301','310','311',
-             '202','203','212','213',  '302','303','312','313',
-             '220','221','230','231',  '320','321','330','331',
-             '222','223','232','233',  '322','323','332','333'
-           ];
+         action.waysForNode = function (nodeId, graph) {
+           var node = graph.entity(nodeId);
+           var splittableParents = graph.parentWays(node).filter(isSplittable);

 
 

-         } else if (dim === 4) {
-           quadKeys = [
-             '00','01',  '10','11',
-             '02','03',  '12','13',
+           if (!_wayIDs) {
+             // If the ways to split aren't specified, only split the lines.
+             // If there are no lines to split, split the areas.
+             var hasLine = splittableParents.some(function (parent) {
+               return parent.geometry(graph) === 'line';
+             });

 
 

-             '20','21',  '30','31',
-             '22','23',  '32','33'
-           ];
+             if (hasLine) {
+               return splittableParents.filter(function (parent) {
+                 return parent.geometry(graph) === 'line';
+               });
+             }
+           }

 
 

-         } else {  // dim === 2
-           quadKeys = [
-             '0', '1',
-             '2', '3'
-           ];
-         }
+           return splittableParents;

 
 

-         return quadKeys;
-       }
+           function isSplittable(parent) {
+             // If the ways to split are specified, ignore everything else.
+             if (_wayIDs && _wayIDs.indexOf(parent.id) === -1) return false; // We can fake splitting closed ways at their endpoints...

 
 

+             if (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.

 
 

+             for (var i = 1; i < parent.nodes.length - 1; i++) {
+               if (parent.nodes[i] === nodeId) return true;
+             }

 
 

-       var serviceStreetside = {
-         /**
-          * init() initialize streetside.
-          */
-         init: function() {
-           if (!_ssCache) {
-             this.reset();
+             return false;

            }
            }

+         };

 
 

-           this.event = utilRebind(this, dispatch$7, 'on');
-         },
+         action.ways = function (graph) {
+           return utilArrayUniq([].concat.apply([], nodeIds.map(function (nodeId) {
+             return action.waysForNode(nodeId, graph);
+           })));
+         };

 
 

-         /**
-          * reset() reset the cache.
-          */
-         reset: function() {
-           if (_ssCache) {
-             Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$6);
+         action.disabled = function (graph) {
+           for (var i = 0; i < nodeIds.length; i++) {
+             var nodeId = nodeIds[i];
+             var candidates = action.waysForNode(nodeId, graph);
+
+             if (candidates.length === 0 || _wayIDs && _wayIDs.length !== candidates.length) {
+               return 'not_eligible';
+             }

            }
            }

+         };

 
 

-           _ssCache = {
-             bubbles: { inflight: {}, loaded: {}, nextPage: {}, rtree: new RBush(), points: {}, leaders: [] },
-             sequences: {}
-           };
-         },
+         action.limitWays = function (val) {
+           if (!arguments.length) return _wayIDs;
+           _wayIDs = val;
+           return action;
+         };

 
 

-         /**
-          * bubbles()
-          */
-         bubbles: function(projection) {
-           var limit = 5;
-           return searchLimited$2(limit, projection, _ssCache.bubbles.rtree);
-         },
+         action.keepHistoryOn = function (val) {
+           if (!arguments.length) return _keepHistoryOn;
+           _keepHistoryOn = val;
+           return action;
+         };

 
 

+         return action;
+       }

 
 

-         sequences: function(projection) {
-           var viewport = projection.clipExtent();
-           var min = [viewport[0][0], viewport[1][1]];
-           var max = [viewport[1][0], viewport[0][1]];
-           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-           var seen = {};
-           var results = [];
+       function coreGraph(other, mutable) {
+         if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);

 
 

-           // all sequences for bubbles in viewport
-           _ssCache.bubbles.rtree.search(bbox)
-             .forEach(function (d) {
-               var key = d.data.sequenceKey;
-               if (key && !seen[key]) {
-                   seen[key] = true;
-                   results.push(_ssCache.sequences[key].geojson);
-               }
-             });
+         if (other instanceof coreGraph) {
+           var base = other.base();
+           this.entities = Object.assign(Object.create(base.entities), other.entities);
+           this._parentWays = Object.assign(Object.create(base.parentWays), other._parentWays);
+           this._parentRels = Object.assign(Object.create(base.parentRels), other._parentRels);
+         } else {
+           this.entities = Object.create({});
+           this._parentWays = Object.create({});
+           this._parentRels = Object.create({});
+           this.rebase(other || [], [this]);
+         }

 
 

-           return results;
+         this.transients = {};
+         this._childNodes = {};
+         this.frozen = !mutable;
+       }
+       coreGraph.prototype = {
+         hasEntity: function hasEntity(id) {
+           return this.entities[id];

          },
          },

+         entity: function entity(id) {
+           var entity = this.entities[id]; //https://github.com/openstreetmap/iD/issues/3973#issuecomment-307052376

 
 

+           if (!entity) {
+             entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
+           }

 
 

-         /**
-          * loadBubbles()
-          */
-         loadBubbles: function(projection, margin) {
-           // by default: request 2 nearby tiles so we can connect sequences.
-           if (margin === undefined) { margin = 2; }
+           if (!entity) {
+             throw new Error('entity ' + id + ' not found');
+           }

 
 

-           loadTiles$2('bubbles', bubbleApi, projection, margin);
+           return entity;
+         },
+         geometry: function geometry(id) {
+           return this.entity(id).geometry(this);

          },
          },

+         "transient": function transient(entity, key, fn) {
+           var id = entity.id;
+           var transients = this.transients[id] || (this.transients[id] = {});

 
 

+           if (transients[key] !== undefined) {
+             return transients[key];
+           }

 
 

-         viewer: function() {
-           return _pannellumViewer;
+           transients[key] = fn.call(entity);
+           return transients[key];

          },
          },

+         parentWays: function parentWays(entity) {
+           var parents = this._parentWays[entity.id];
+           var result = [];

 
 

+           if (parents) {
+             parents.forEach(function (id) {
+               result.push(this.entity(id));
+             }, this);
+           }

 
 

-         initViewer: function () {
-           if (!window.pannellum) { return; }
-           if (_pannellumViewer) { return; }
+           return result;
+         },
+         isPoi: function isPoi(entity) {
+           var parents = this._parentWays[entity.id];
+           return !parents || parents.size === 0;
+         },
+         isShared: function isShared(entity) {
+           var parents = this._parentWays[entity.id];
+           return parents && parents.size > 1;
+         },
+         parentRelations: function parentRelations(entity) {
+           var parents = this._parentRels[entity.id];
+           var result = [];

 
 

-           var sceneID = ++_currScene + '';
-           var options = {
-             'default': { firstScene: sceneID },
-             scenes: {}
-           };
-           options.scenes[sceneID] = _sceneOptions;
+           if (parents) {
+             parents.forEach(function (id) {
+               result.push(this.entity(id));
+             }, this);
+           }

 
 

-           _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
+           return result;
+         },
+         parentMultipolygons: function parentMultipolygons(entity) {
+           return this.parentRelations(entity).filter(function (relation) {
+             return relation.isMultipolygon();
+           });

          },
          },

+         childNodes: function childNodes(entity) {
+           if (this._childNodes[entity.id]) return this._childNodes[entity.id];
+           if (!entity.nodes) return [];
+           var nodes = [];

 
 

+           for (var i = 0; i < entity.nodes.length; i++) {
+             nodes[i] = this.entity(entity.nodes[i]);
+           }
+           this._childNodes[entity.id] = nodes;
+           return this._childNodes[entity.id];
+         },
+         base: function base() {
+           return {
+             'entities': Object.getPrototypeOf(this.entities),
+             'parentWays': Object.getPrototypeOf(this._parentWays),
+             'parentRels': Object.getPrototypeOf(this._parentRels)
+           };
+         },
+         // Unlike other graph methods, rebase mutates in place. This is because it
+         // is used only during the history operation that merges newly downloaded
+         // data into each state. To external consumers, it should appear as if the
+         // graph always contained the newly downloaded data.
+         rebase: function rebase(entities, stack, force) {
+           var base = this.base();
+           var i, j, k, id;

 
 

-         /**
-          * loadViewer() create the streeside viewer.
-          */
-         loadViewer: function(context) {
-           var that = this;
+           for (i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             if (!entity.visible || !force && base.entities[entity.id]) continue; // Merging data into the base graph

 
 

-           var pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+             base.entities[entity.id] = entity;

 
 

-           // create ms-wrapper, a photo wrapper class
-           var wrap = context.container().select('.photoviewer').selectAll('.ms-wrapper')
-             .data([0]);
+             this._updateCalculated(undefined, entity, base.parentWays, base.parentRels); // Restore provisionally-deleted nodes that are discovered to have an extant parent

 
 

-           // inject ms-wrapper into the photoviewer div
-           // (used by all to house each custom photo viewer)
-           var wrapEnter = wrap.enter()
-             .append('div')
-             .attr('class', 'photo-wrapper ms-wrapper')
-             .classed('hide', true);
-
-           // inject div to support streetside viewer (pannellum) and attribution line
-           wrapEnter
-             .append('div')
-             .attr('id', 'ideditor-viewer-streetside')
-             .on(pointerPrefix + 'down.streetside', function () {
-               select(window)
-                 .on(pointerPrefix + 'move.streetside', function () {
-                   dispatch$7.call('viewerChanged');
-                 }, true);
-             })
-             .on(pointerPrefix + 'up.streetside pointercancel.streetside', function () {
-               select(window)
-                 .on(pointerPrefix + 'move.streetside', null);
-
-               // continue dispatching events for a few seconds, in case viewer has inertia.
-               var t = timer(function (elapsed) {
-                 dispatch$7.call('viewerChanged');
-                 if (elapsed > 2000) {
-                   t.stop();
+
+             if (entity.type === 'way') {
+               for (j = 0; j < entity.nodes.length; j++) {
+                 id = entity.nodes[j];
+
+                 for (k = 1; k < stack.length; k++) {
+                   var ents = stack[k].entities;
+
+                   if (ents.hasOwnProperty(id) && ents[id] === undefined) {
+                     delete ents[id];
+                   }

                  }
                  }

-               });
-             })
-             .append('div')
-             .attr('class', 'photo-attribution fillD');
-
-           var controlsEnter = wrapEnter
-             .append('div')
-             .attr('class', 'photo-controls-wrap')
-             .append('div')
-             .attr('class', 'photo-controls');
-
-           controlsEnter
-             .append('button')
-             .on('click.back', step(-1))
-             .text('◄');
-
-           controlsEnter
-             .append('button')
-             .on('click.forward', step(1))
-             .text('►');
-
-
-           // create working canvas for stitching together images
-           wrap = wrap
-             .merge(wrapEnter)
-             .call(setupCanvas, true);
-
-           // load streetside pannellum viewer css
-           select('head').selectAll('#ideditor-streetside-viewercss')
-             .data([0])
-             .enter()
-             .append('link')
-             .attr('id', 'ideditor-streetside-viewercss')
-             .attr('rel', 'stylesheet')
-             .attr('href', context.asset(pannellumViewerCSS));
-
-           // load streetside pannellum viewer js
-           select('head').selectAll('#ideditor-streetside-viewerjs')
-             .data([0])
-             .enter()
-             .append('script')
-             .attr('id', 'ideditor-streetside-viewerjs')
-             .attr('src', context.asset(pannellumViewerJS));
-
-
-           // Register viewer resize handler
-           context.ui().photoviewer.on('resize.streetside', function () {
-             if (_pannellumViewer) {
-               _pannellumViewer.resize();
+               }

              }
              }

-           });
-
+           }

 
 

-           function step(stepBy) {
-             return function () {
-               var viewer = context.container().select('.photoviewer');
-               var selected = viewer.empty() ? undefined : viewer.datum();
-               if (!selected) { return; }
+           for (i = 0; i < stack.length; i++) {
+             stack[i]._updateRebased();
+           }
+         },
+         _updateRebased: function _updateRebased() {
+           var base = this.base();
+           Object.keys(this._parentWays).forEach(function (child) {
+             if (base.parentWays[child]) {
+               base.parentWays[child].forEach(function (id) {
+                 if (!this.entities.hasOwnProperty(id)) {
+                   this._parentWays[child].add(id);
+                 }
+               }, this);
+             }
+           }, this);
+           Object.keys(this._parentRels).forEach(function (child) {
+             if (base.parentRels[child]) {
+               base.parentRels[child].forEach(function (id) {
+                 if (!this.entities.hasOwnProperty(id)) {
+                   this._parentRels[child].add(id);
+                 }
+               }, this);
+             }
+           }, this);
+           this.transients = {}; // this._childNodes is not updated, under the assumption that
+           // ways are always downloaded with their child nodes.
+         },
+         // Updates calculated properties (parentWays, parentRels) for the specified change
+         _updateCalculated: function _updateCalculated(oldentity, entity, parentWays, parentRels) {
+           parentWays = parentWays || this._parentWays;
+           parentRels = parentRels || this._parentRels;
+           var type = entity && entity.type || oldentity && oldentity.type;
+           var removed, added, i;
+
+           if (type === 'way') {
+             // Update parentWays
+             if (oldentity && entity) {
+               removed = utilArrayDifference(oldentity.nodes, entity.nodes);
+               added = utilArrayDifference(entity.nodes, oldentity.nodes);
+             } else if (oldentity) {
+               removed = oldentity.nodes;
+               added = [];
+             } else if (entity) {
+               removed = [];
+               added = entity.nodes;
+             }

 
 

-               var nextID = (stepBy === 1 ? selected.ne : selected.pr);
-               var yaw = _pannellumViewer.getYaw();
-               var ca = selected.ca + yaw;
-               var origin = selected.loc;
+             for (i = 0; i < removed.length; i++) {
+               // make a copy of prototype property, store as own property, and update..
+               parentWays[removed[i]] = new Set(parentWays[removed[i]]);
+               parentWays[removed[i]]["delete"](oldentity.id);
+             }

 
 

-               // construct a search trapezoid pointing out from current bubble
-               var meters = 35;
-               var p1 = [
-                 origin[0] + geoMetersToLon(meters / 5, origin[1]),
-                 origin[1]
-               ];
-               var p2 = [
-                 origin[0] + geoMetersToLon(meters / 2, origin[1]),
-                 origin[1] + geoMetersToLat(meters)
-               ];
-               var p3 = [
-                 origin[0] - geoMetersToLon(meters / 2, origin[1]),
-                 origin[1] + geoMetersToLat(meters)
-               ];
-               var p4 = [
-                 origin[0] - geoMetersToLon(meters / 5, origin[1]),
-                 origin[1]
-               ];
+             for (i = 0; i < added.length; i++) {
+               // make a copy of prototype property, store as own property, and update..
+               parentWays[added[i]] = new Set(parentWays[added[i]]);
+               parentWays[added[i]].add(entity.id);
+             }
+           } else if (type === 'relation') {
+             // Update parentRels
+             // diff only on the IDs since the same entity can be a member multiple times with different roles
+             var oldentityMemberIDs = oldentity ? oldentity.members.map(function (m) {
+               return m.id;
+             }) : [];
+             var entityMemberIDs = entity ? entity.members.map(function (m) {
+               return m.id;
+             }) : [];
+
+             if (oldentity && entity) {
+               removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
+               added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
+             } else if (oldentity) {
+               removed = oldentityMemberIDs;
+               added = [];
+             } else if (entity) {
+               removed = [];
+               added = entityMemberIDs;
+             }

 
 

-               var poly = [p1, p2, p3, p4, p1];
+             for (i = 0; i < removed.length; i++) {
+               // make a copy of prototype property, store as own property, and update..
+               parentRels[removed[i]] = new Set(parentRels[removed[i]]);
+               parentRels[removed[i]]["delete"](oldentity.id);
+             }

 
 

-               // rotate it to face forward/backward
-               var angle = (stepBy === 1 ? ca : ca + 180) * (Math.PI / 180);
-               poly = geoRotate(poly, -angle, origin);
+             for (i = 0; i < added.length; i++) {
+               // make a copy of prototype property, store as own property, and update..
+               parentRels[added[i]] = new Set(parentRels[added[i]]);
+               parentRels[added[i]].add(entity.id);
+             }
+           }
+         },
+         replace: function replace(entity) {
+           if (this.entities[entity.id] === entity) return this;
+           return this.update(function () {
+             this._updateCalculated(this.entities[entity.id], entity);

 
 

-               var extent = poly.reduce(function (extent, point) {
-                 return extent.extend(geoExtent(point));
-               }, geoExtent());
+             this.entities[entity.id] = entity;
+           });
+         },
+         remove: function remove(entity) {
+           return this.update(function () {
+             this._updateCalculated(entity, undefined);

 
 

-               // find nearest other bubble in the search polygon
-               var minDist = Infinity;
-               _ssCache.bubbles.rtree.search(extent.bbox())
-                 .forEach(function (d) {
-                   if (d.data.key === selected.key) { return; }
-                   if (!geoPointInPolygon(d.data.loc, poly)) { return; }
-
-                   var dist = geoVecLength(d.data.loc, selected.loc);
-                   var theta = selected.ca - d.data.ca;
-                   var minTheta = Math.min(Math.abs(theta), 360 - Math.abs(theta));
-                   if (minTheta > 20) {
-                     dist += 5;  // penalize distance if camera angles don't match
-                   }
+             this.entities[entity.id] = undefined;
+           });
+         },
+         revert: function revert(id) {
+           var baseEntity = this.base().entities[id];
+           var headEntity = this.entities[id];
+           if (headEntity === baseEntity) return this;
+           return this.update(function () {
+             this._updateCalculated(headEntity, baseEntity);
+
+             delete this.entities[id];
+           });
+         },
+         update: function update() {
+           var graph = this.frozen ? coreGraph(this, true) : this;

 
 

-                   if (dist < minDist) {
-                     nextID = d.data.key;
-                     minDist = dist;
-                   }
-                 });
+           for (var i = 0; i < arguments.length; i++) {
+             arguments[i].call(graph, graph);
+           }

 
 

-               var nextBubble = nextID && _ssCache.bubbles.points[nextID];
-               if (!nextBubble) { return; }
+           if (this.frozen) graph.frozen = true;
+           return graph;
+         },
+         // Obliterates any existing entities
+         load: function load(entities) {
+           var base = this.base();
+           this.entities = Object.create(base.entities);

 
 

-               context.map().centerEase(nextBubble.loc);
+           for (var i in entities) {
+             this.entities[i] = entities[i];

 
 

-               that.selectImage(context, nextBubble)
-                 .then(function (response) {
-                   if (response.status === 'ok') {
-                     _sceneOptions.yaw = yaw;
-                     that.showViewer(context);
-                   }
-                 });
-             };
+             this._updateCalculated(base.entities[i], this.entities[i]);

            }
            }

-         },

 
 

+           return this;
+         }
+       };

 
 

-         /**
-          * showViewer()
-          */
-         showViewer: function(context, yaw) {
-           if (!_sceneOptions) { return; }
+       function osmTurn(turn) {
+         if (!(this instanceof osmTurn)) {
+           return new osmTurn(turn);
+         }

 
 

-           if (yaw !== undefined) {
-             _sceneOptions.yaw = yaw;
-           }
+         Object.assign(this, turn);
+       }
+       function osmIntersection(graph, startVertexId, maxDistance) {
+         maxDistance = maxDistance || 30; // in meters

 
 

-           if (!_pannellumViewer) {
-             this.initViewer();
-           } else {
-             // make a new scene
-             var sceneID = ++_currScene + '';
-             _pannellumViewer
-               .addScene(sceneID, _sceneOptions)
-               .loadScene(sceneID);
+         var vgraph = coreGraph(); // virtual graph

 
 

-             // remove previous scene
-             if (_currScene > 2) {
-               sceneID = (_currScene - 1) + '';
-               _pannellumViewer
-                 .removeScene(sceneID);
-             }
-           }
+         var i, j, k;

 
 

-           var wrap = context.container().select('.photoviewer')
-             .classed('hide', false);
+         function memberOfRestriction(entity) {
+           return graph.parentRelations(entity).some(function (r) {
+             return r.isRestriction();
+           });
+         }

 
 

-           var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
+         function isRoad(way) {
+           if (way.isArea() || way.isDegenerate()) return false;
+           var roads = {
+             'motorway': true,
+             'motorway_link': true,
+             'trunk': true,
+             'trunk_link': true,
+             'primary': true,
+             'primary_link': true,
+             'secondary': true,
+             'secondary_link': true,
+             'tertiary': true,
+             'tertiary_link': true,
+             'residential': true,
+             'unclassified': true,
+             'living_street': true,
+             'service': true,
+             'road': true,
+             'track': true
+           };
+           return roads[way.tags.highway];
+         }
+
+         var startNode = graph.entity(startVertexId);
+         var checkVertices = [startNode];
+         var checkWays;
+         var vertices = [];
+         var vertexIds = [];
+         var vertex;
+         var ways = [];
+         var wayIds = [];
+         var way;
+         var nodes = [];
+         var node;
+         var parents = [];
+         var parent; // `actions` will store whatever actions must be performed to satisfy
+         // preconditions for adding a turn restriction to this intersection.
+         //  - Remove any existing degenerate turn restrictions (missing from/to, etc)
+         //  - Reverse oneways so that they are drawn in the forward direction
+         //  - Split ways on key vertices
+
+         var actions = []; // STEP 1:  walk the graph outwards from starting vertex to search
+         //  for more key vertices and ways to include in the intersection..
+
+         while (checkVertices.length) {
+           vertex = checkVertices.pop(); // check this vertex for parent ways that are roads
+
+           checkWays = graph.parentWays(vertex);
+           var hasWays = false;
+
+           for (i = 0; i < checkWays.length; i++) {
+             way = checkWays[i];
+             if (!isRoad(way) && !memberOfRestriction(way)) continue;
+             ways.push(way); // it's a road, or it's already in a turn restriction
+
+             hasWays = true; // check the way's children for more key vertices
+
+             nodes = utilArrayUniq(graph.childNodes(way));
+
+             for (j = 0; j < nodes.length; j++) {
+               node = nodes[j];
+               if (node === vertex) continue; // same thing
+
+               if (vertices.indexOf(node) !== -1) continue; // seen it already
+
+               if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) continue; // too far from start
+               // a key vertex will have parents that are also roads
+
+               var hasParents = false;
+               parents = graph.parentWays(node);
+
+               for (k = 0; k < parents.length; k++) {
+                 parent = parents[k];
+                 if (parent === way) continue; // same thing
+
+                 if (ways.indexOf(parent) !== -1) continue; // seen it already
+
+                 if (!isRoad(parent)) continue; // not a road
+
+                 hasParents = true;
+                 break;
+               }

 
 

-           if (isHidden) {
-             wrap
-               .selectAll('.photo-wrapper:not(.ms-wrapper)')
-               .classed('hide', true);
+               if (hasParents) {
+                 checkVertices.push(node);
+               }
+             }
+           }

 
 

-             wrap
-               .selectAll('.photo-wrapper.ms-wrapper')
-               .classed('hide', false);
+           if (hasWays) {
+             vertices.push(vertex);

            }
            }

+         }

 
 

-           return this;
-         },
+         vertices = utilArrayUniq(vertices);
+         ways = utilArrayUniq(ways); // STEP 2:  Build a virtual graph containing only the entities in the intersection..
+         // Everything done after this step should act on the virtual graph
+         // Any actions that must be performed later to the main graph go in `actions` array

 
 

+         ways.forEach(function (way) {
+           graph.childNodes(way).forEach(function (node) {
+             vgraph = vgraph.replace(node);
+           });
+           vgraph = vgraph.replace(way);
+           graph.parentRelations(way).forEach(function (relation) {
+             if (relation.isRestriction()) {
+               if (relation.isValidRestriction(graph)) {
+                 vgraph = vgraph.replace(relation);
+               } else if (relation.isComplete(graph)) {
+                 actions.push(actionDeleteRelation(relation.id));
+               }
+             }
+           });
+         }); // STEP 3:  Force all oneways to be drawn in the forward direction

 
 

-         /**
-          * hideViewer()
-          */
-         hideViewer: function (context) {
-           var viewer = context.container().select('.photoviewer');
-           if (!viewer.empty()) { viewer.datum(null); }
+         ways.forEach(function (w) {
+           var way = vgraph.entity(w.id);

 
 

-           viewer
-             .classed('hide', true)
-             .selectAll('.photo-wrapper')
-             .classed('hide', true);
+           if (way.tags.oneway === '-1') {
+             var action = actionReverse(way.id, {
+               reverseOneway: true
+             });
+             actions.push(action);
+             vgraph = action(vgraph);
+           }
+         }); // STEP 4:  Split ways on key vertices
+
+         var origCount = osmEntity.id.next.way;
+         vertices.forEach(function (v) {
+           // This is an odd way to do it, but we need to find all the ways that
+           // will be split here, then split them one at a time to ensure that these
+           // actions can be replayed on the main graph exactly in the same order.
+           // (It is unintuitive, but the order of ways returned from graph.parentWays()
+           // is arbitrary, depending on how the main graph and vgraph were built)
+           var splitAll = actionSplit([v.id]).keepHistoryOn('first');
+
+           if (!splitAll.disabled(vgraph)) {
+             splitAll.ways(vgraph).forEach(function (way) {
+               var splitOne = actionSplit([v.id]).limitWays([way.id]).keepHistoryOn('first');
+               actions.push(splitOne);
+               vgraph = splitOne(vgraph);
+             });
+           }
+         }); // In here is where we should also split the intersection at nearby junction.
+         //   for https://github.com/mapbox/iD-internal/issues/31
+         // nearbyVertices.forEach(function(v) {
+         // });
+         // Reasons why we reset the way id count here:
+         //  1. Continuity with way ids created by the splits so that we can replay
+         //     these actions later if the user decides to create a turn restriction
+         //  2. Avoids churning way ids just by hovering over a vertex
+         //     and displaying the turn restriction editor

 
 

-           context.container().selectAll('.viewfield-group, .sequence, .icon-sign')
-             .classed('currentView', false);
+         osmEntity.id.next.way = origCount; // STEP 5:  Update arrays to point to vgraph entities

 
 

-           return this.setStyles(context, null, true);
-         },
+         vertexIds = vertices.map(function (v) {
+           return v.id;
+         });
+         vertices = [];
+         ways = [];
+         vertexIds.forEach(function (id) {
+           var vertex = vgraph.entity(id);
+           var parents = vgraph.parentWays(vertex);
+           vertices.push(vertex);
+           ways = ways.concat(parents);
+         });
+         vertices = utilArrayUniq(vertices);
+         ways = utilArrayUniq(ways);
+         vertexIds = vertices.map(function (v) {
+           return v.id;
+         });
+         wayIds = ways.map(function (w) {
+           return w.id;
+         }); // STEP 6:  Update the ways with some metadata that will be useful for
+         // walking the intersection graph later and rendering turn arrows.

 
 

+         function withMetadata(way, vertexIds) {
+           var __oneWay = way.isOneWay(); // which affixes are key vertices?

 
 

-         /**
-          * selectImage().
-          */
-         selectImage: function (context, d) {
-           var that = this;
-           var viewer = context.container().select('.photoviewer');
-           if (!viewer.empty()) { viewer.datum(d); }

 
 

-           this.setStyles(context, null, true);
+           var __first = vertexIds.indexOf(way.first()) !== -1;

 
 

-           var wrap = context.container().select('.photoviewer .ms-wrapper');
-           var attribution = wrap.selectAll('.photo-attribution').html('');
+           var __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?

 
 

-           wrap.selectAll('.pnlm-load-box')   // display "loading.."
-             .style('display', 'block');

 
 

-           if (!d) {
-             return Promise.resolve({ status: 'ok' });
-           }
+           var __via = __first && __last;

 
 

-           var line1 = attribution
-             .append('div')
-             .attr('class', 'attribution-row');
+           var __from = __first && !__oneWay || __last;

 
 

-           var hiresDomId = utilUniqueDomId('streetside-hires');
+           var __to = __first || __last && !__oneWay;

 
 

-           // Add hires checkbox
-           var label = line1
-             .append('label')
-             .attr('for', hiresDomId)
-             .attr('class', 'streetside-hires');
+           return way.update({
+             __first: __first,
+             __last: __last,
+             __from: __from,
+             __via: __via,
+             __to: __to,
+             __oneWay: __oneWay
+           });
+         }

 
 

-           label
-             .append('input')
-             .attr('type', 'checkbox')
-             .attr('id', hiresDomId)
-             .property('checked', _hires)
-             .on('click', function () {
-               event.stopPropagation();
+         ways = [];
+         wayIds.forEach(function (id) {
+           var way = withMetadata(vgraph.entity(id), vertexIds);
+           vgraph = vgraph.replace(way);
+           ways.push(way);
+         }); // STEP 7:  Simplify - This is an iterative process where we:
+         //  1. Find trivial vertices with only 2 parents
+         //  2. trim off the leaf way from those vertices and remove from vgraph

 
 

-               _hires = !_hires;
-               _resolution = _hires ? 1024 : 512;
-               wrap.call(setupCanvas, true);
+         var keepGoing;
+         var removeWayIds = [];
+         var removeVertexIds = [];

 
 

-               var viewstate = {
-                 yaw: _pannellumViewer.getYaw(),
-                 pitch: _pannellumViewer.getPitch(),
-                 hfov: _pannellumViewer.getHfov()
-               };
+         do {
+           keepGoing = false;
+           checkVertices = vertexIds.slice();

 
 

-               that.selectImage(context, d)
-                 .then(function (response) {
-                   if (response.status === 'ok') {
-                     _sceneOptions = Object.assign(_sceneOptions, viewstate);
-                     that.showViewer(context);
-                   }
-                 });
-             });
+           for (i = 0; i < checkVertices.length; i++) {
+             var vertexId = checkVertices[i];
+             vertex = vgraph.hasEntity(vertexId);

 
 

-           label
-             .append('span')
-             .text(_t('streetside.hires'));
+             if (!vertex) {
+               if (vertexIds.indexOf(vertexId) !== -1) {
+                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+               }

 
 

+               removeVertexIds.push(vertexId);
+               continue;
+             }

 
 

-           var captureInfo = line1
-             .append('div')
-             .attr('class', 'attribution-capture-info');
+             parents = vgraph.parentWays(vertex);

 
 

-           // Add capture date
-           if (d.captured_by) {
-             var yyyy = (new Date()).getFullYear();
+             if (parents.length < 3) {
+               if (vertexIds.indexOf(vertexId) !== -1) {
+                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+               }
+             }

 
 

-             captureInfo
-               .append('a')
-               .attr('class', 'captured_by')
-               .attr('target', '_blank')
-               .attr('href', 'https://www.microsoft.com/en-us/maps/streetside')
-               .text('©' + yyyy + ' Microsoft');
+             if (parents.length === 2) {
+               // vertex with 2 parents is trivial
+               var a = parents[0];
+               var b = parents[1];
+               var aIsLeaf = a && !a.__via;
+               var bIsLeaf = b && !b.__via;
+               var leaf, survivor;

 
 

-             captureInfo
-               .append('span')
-               .text('|');
-           }
+               if (aIsLeaf && !bIsLeaf) {
+                 leaf = a;
+                 survivor = b;
+               } else if (!aIsLeaf && bIsLeaf) {
+                 leaf = b;
+                 survivor = a;
+               }

 
 

-           if (d.captured_at) {
-             captureInfo
-               .append('span')
-               .attr('class', 'captured_at')
-               .text(localeTimestamp(d.captured_at));
-           }
+               if (leaf && survivor) {
+                 survivor = withMetadata(survivor, vertexIds); // update survivor way

 
 

-           // Add image links
-           var line2 = attribution
-             .append('div')
-             .attr('class', 'attribution-row');
+                 vgraph = vgraph.replace(survivor).remove(leaf); // update graph

 
 

-           line2
-             .append('a')
-             .attr('class', 'image-view-link')
-             .attr('target', '_blank')
-             .attr('href', 'https://www.bing.com/maps?cp=' + d.loc[1] + '~' + d.loc[0] +
-               '&lvl=17&dir=' + d.ca + '&style=x&v=2&sV=1')
-             .text(_t('streetside.view_on_bing'));
+                 removeWayIds.push(leaf.id);
+                 keepGoing = true;
+               }
+             }

 
 

-           line2
-             .append('a')
-             .attr('class', 'image-report-link')
-             .attr('target', '_blank')
-             .attr('href', 'https://www.bing.com/maps/privacyreport/streetsideprivacyreport?bubbleid=' +
-               encodeURIComponent(d.key) + '&focus=photo&lat=' + d.loc[1] + '&lng=' + d.loc[0] + '&z=17')
-             .text(_t('streetside.report'));
+             parents = vgraph.parentWays(vertex);

 
 

+             if (parents.length < 2) {
+               // vertex is no longer a key vertex
+               if (vertexIds.indexOf(vertexId) !== -1) {
+                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+               }

 
 

-           var bubbleIdQuadKey = d.key.toString(4);
-           var paddingNeeded = 16 - bubbleIdQuadKey.length;
-           for (var i = 0; i < paddingNeeded; i++) {
-             bubbleIdQuadKey = '0' + bubbleIdQuadKey;
+               removeVertexIds.push(vertexId);
+               keepGoing = true;
+             }
+
+             if (parents.length < 1) {
+               // vertex is no longer attached to anything
+               vgraph = vgraph.remove(vertex);
+             }

            }
            }

-           var imgUrlPrefix = streetsideImagesApi + 'hs' + bubbleIdQuadKey;
-           var imgUrlSuffix = '.jpg?g=6338&n=z';
+         } while (keepGoing);

 
 

-           // Cubemap face code order matters here: front=01, right=02, back=03, left=10, up=11, down=12
-           var faceKeys = ['01','02','03','10','11','12'];
+         vertices = vertices.filter(function (vertex) {
+           return removeVertexIds.indexOf(vertex.id) === -1;
+         }).map(function (vertex) {
+           return vgraph.entity(vertex.id);
+         });
+         ways = ways.filter(function (way) {
+           return removeWayIds.indexOf(way.id) === -1;
+         }).map(function (way) {
+           return vgraph.entity(way.id);
+         }); // OK!  Here is our intersection..
+
+         var intersection = {
+           graph: vgraph,
+           actions: actions,
+           vertices: vertices,
+           ways: ways
+         }; // Get all the valid turns through this intersection given a starting way id.
+         // This operates on the virtual graph for everything.
+         //
+         // Basically, walk through all possible paths from starting way,
+         //   honoring the existing turn restrictions as we go (watch out for loops!)
+         //
+         // For each path found, generate and return a `osmTurn` datastructure.
+         //

 
 

-           // Map images to cube faces
-           var quadKeys = getQuadKeys();
-           var faces = faceKeys.map(function (faceKey) {
-             return quadKeys.map(function (quadKey) {
-               var xy = qkToXY(quadKey);
-               return {
-                 face: faceKey,
-                 url: imgUrlPrefix + faceKey + quadKey + imgUrlSuffix,
-                 x: xy[0],
-                 y: xy[1]
-               };
-             });
+         intersection.turns = function (fromWayId, maxViaWay) {
+           if (!fromWayId) return [];
+           if (!maxViaWay) maxViaWay = 0;
+           var vgraph = intersection.graph;
+           var keyVertexIds = intersection.vertices.map(function (v) {
+             return v.id;

            });
            });

+           var start = vgraph.entity(fromWayId);
+           if (!start || !(start.__from || start.__via)) return []; // maxViaWay=0   from-*-to              (0 vias)
+           // maxViaWay=1   from-*-via-*-to        (1 via max)
+           // maxViaWay=2   from-*-via-*-via-*-to  (2 vias max)

 
 

-           return loadFaces(faces)
-             .then(function () {
-               _sceneOptions = {
-                 showFullscreenCtrl: false,
-                 autoLoad: true,
-                 compass: true,
-                 northOffset: d.ca,
-                 yaw: 0,
-                 minHfov: minHfov,
-                 maxHfov: maxHfov,
-                 hfov: defaultHfov,
-                 type: 'cubemap',
-                 cubeMap: [
-                   _dataUrlArray[0],
-                   _dataUrlArray[1],
-                   _dataUrlArray[2],
-                   _dataUrlArray[3],
-                   _dataUrlArray[4],
-                   _dataUrlArray[5]
-                 ]
-               };
-               return { status: 'ok' };
-             });
-         },
-
-
-         getSequenceKeyForBubble: function(d) {
-           return d && d.sequenceKey;
-         },
-
+           var maxPathLength = maxViaWay * 2 + 3;
+           var turns = [];
+           step(start);
+           return turns; // traverse the intersection graph and find all the valid paths

 
 

-         // Updates the currently highlighted sequence and selected bubble.
-         // Reset is only necessary when interacting with the viewport because
-         // this implicitly changes the currently selected bubble/sequence
-         setStyles: function (context, hovered, reset) {
-           if (reset) {  // reset all layers
-             context.container().selectAll('.viewfield-group')
-               .classed('highlighted', false)
-               .classed('hovered', false)
-               .classed('currentView', false);
+           function step(entity, currPath, currRestrictions, matchedRestriction) {
+             currPath = (currPath || []).slice(); // shallow copy

 
 

-             context.container().selectAll('.sequence')
-               .classed('highlighted', false)
-               .classed('currentView', false);
-           }
+             if (currPath.length >= maxPathLength) return;
+             currPath.push(entity.id);
+             currRestrictions = (currRestrictions || []).slice(); // shallow copy

 
 

-           var hoveredBubbleKey = hovered && hovered.key;
-           var hoveredSequenceKey = this.getSequenceKeyForBubble(hovered);
-           var hoveredSequence = hoveredSequenceKey && _ssCache.sequences[hoveredSequenceKey];
-           var hoveredBubbleKeys =  (hoveredSequence && hoveredSequence.bubbles.map(function (d) { return d.key; })) || [];
+             var i, j;

 
 

-           var viewer = context.container().select('.photoviewer');
-           var selected = viewer.empty() ? undefined : viewer.datum();
-           var selectedBubbleKey = selected && selected.key;
-           var selectedSequenceKey = this.getSequenceKeyForBubble(selected);
-           var selectedSequence = selectedSequenceKey && _ssCache.sequences[selectedSequenceKey];
-           var selectedBubbleKeys = (selectedSequence && selectedSequence.bubbles.map(function (d) { return d.key; })) || [];
+             if (entity.type === 'node') {
+               var parents = vgraph.parentWays(entity);
+               var nextWays = []; // which ways can we step into?

 
 

-           // highlight sibling viewfields on either the selected or the hovered sequences
-           var highlightedBubbleKeys = utilArrayUnion(hoveredBubbleKeys, selectedBubbleKeys);
+               for (i = 0; i < parents.length; i++) {
+                 var way = parents[i]; // if next way is a oneway incoming to this vertex, skip

 
 

-           context.container().selectAll('.layer-streetside-images .viewfield-group')
-             .classed('highlighted', function (d) { return highlightedBubbleKeys.indexOf(d.key) !== -1; })
-             .classed('hovered',     function (d) { return d.key === hoveredBubbleKey; })
-             .classed('currentView', function (d) { return d.key === selectedBubbleKey; });
+                 if (way.__oneWay && way.nodes[0] !== entity.id) continue; // if we have seen it before (allowing for an initial u-turn), skip

 
 

-           context.container().selectAll('.layer-streetside-images .sequence')
-             .classed('highlighted', function (d) { return d.properties.key === hoveredSequenceKey; })
-             .classed('currentView', function (d) { return d.properties.key === selectedSequenceKey; });
+                 if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) continue; // Check all "current" restrictions (where we've already walked the `FROM`)

 
 

-           // update viewfields if needed
-           context.container().selectAll('.viewfield-group .viewfield')
-             .attr('d', viewfieldPath);
+                 var restrict = null;

 
 

-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
-             if (d.pano && d.key !== selectedBubbleKey) {
-               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-             } else {
-               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-             }
-           }
+                 for (j = 0; j < currRestrictions.length; j++) {
+                   var restriction = currRestrictions[j];
+                   var f = restriction.memberByRole('from');
+                   var v = restriction.membersByRole('via');
+                   var t = restriction.memberByRole('to');
+                   var isOnly = /^only_/.test(restriction.tags.restriction); // Does the current path match this turn restriction?

 
 

-           return this;
-         },
+                   var matchesFrom = f.id === fromWayId;
+                   var matchesViaTo = false;
+                   var isAlongOnlyPath = false;

 
 

+                   if (t.id === way.id) {
+                     // match TO
+                     if (v.length === 1 && v[0].type === 'node') {
+                       // match VIA node
+                       matchesViaTo = v[0].id === entity.id && (matchesFrom && currPath.length === 2 || !matchesFrom && currPath.length > 2);
+                     } else {
+                       // match all VIA ways
+                       var pathVias = [];

 
 

-         /**
-          * cache().
-          */
-         cache: function () {
-           return _ssCache;
-         }
-       };
+                       for (k = 2; k < currPath.length; k += 2) {
+                         // k = 2 skips FROM
+                         pathVias.push(currPath[k]); // (path goes way-node-way...)
+                       }

 
 

-       var apibase$4 = 'https://taginfo.openstreetmap.org/api/4/';
-       var _inflight$2 = {};
-       var _popularKeys = {};
-       var _taginfoCache = {};
+                       var restrictionVias = [];

 
 

-       var tag_sorts = {
-           point: 'count_nodes',
-           vertex: 'count_nodes',
-           area: 'count_ways',
-           line: 'count_ways'
-       };
-       var tag_sort_members = {
-           point: 'count_node_members',
-           vertex: 'count_node_members',
-           area: 'count_way_members',
-           line: 'count_way_members',
-           relation: 'count_relation_members'
-       };
-       var tag_filters = {
-           point: 'nodes',
-           vertex: 'nodes',
-           area: 'ways',
-           line: 'ways'
-       };
-       var tag_members_fractions = {
-           point: 'count_node_members_fraction',
-           vertex: 'count_node_members_fraction',
-           area: 'count_way_members_fraction',
-           line: 'count_way_members_fraction',
-           relation: 'count_relation_members_fraction'
-       };
+                       for (k = 0; k < v.length; k++) {
+                         if (v[k].type === 'way') {
+                           restrictionVias.push(v[k].id);
+                         }
+                       }

 
 

+                       var diff = utilArrayDifference(pathVias, restrictionVias);
+                       matchesViaTo = !diff.length;
+                     }
+                   } else if (isOnly) {
+                     for (k = 0; k < v.length; k++) {
+                       // way doesn't match TO, but is one of the via ways along the path of an "only"
+                       if (v[k].type === 'way' && v[k].id === way.id) {
+                         isAlongOnlyPath = true;
+                         break;
+                       }
+                     }
+                   }

 
 

-       function sets(params, n, o) {
-           if (params.geometry && o[params.geometry]) {
-               params[n] = o[params.geometry];
-           }
-           return params;
-       }
+                   if (matchesViaTo) {
+                     if (isOnly) {
+                       restrict = {
+                         id: restriction.id,
+                         direct: matchesFrom,
+                         from: f.id,
+                         only: true,
+                         end: true
+                       };
+                     } else {
+                       restrict = {
+                         id: restriction.id,
+                         direct: matchesFrom,
+                         from: f.id,
+                         no: true,
+                         end: true
+                       };
+                     }
+                   } else {
+                     // indirect - caused by a different nearby restriction
+                     if (isAlongOnlyPath) {
+                       restrict = {
+                         id: restriction.id,
+                         direct: false,
+                         from: f.id,
+                         only: true,
+                         end: false
+                       };
+                     } else if (isOnly) {
+                       restrict = {
+                         id: restriction.id,
+                         direct: false,
+                         from: f.id,
+                         no: true,
+                         end: true
+                       };
+                     }
+                   } // stop looking if we find a "direct" restriction (matching FROM, VIA, TO)

 
 
 
 

-       function setFilter(params) {
-           return sets(params, 'filter', tag_filters);
-       }
+                   if (restrict && restrict.direct) break;
+                 }

 
 

+                 nextWays.push({
+                   way: way,
+                   restrict: restrict
+                 });
+               }

 
 

-       function setSort(params) {
-           return sets(params, 'sortname', tag_sorts);
-       }
+               nextWays.forEach(function (nextWay) {
+                 step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
+               });
+             } else {
+               // entity.type === 'way'
+               if (currPath.length >= 3) {
+                 // this is a "complete" path..
+                 var turnPath = currPath.slice(); // shallow copy
+                 // an indirect restriction - only include the partial path (starting at FROM)
+
+                 if (matchedRestriction && matchedRestriction.direct === false) {
+                   for (i = 0; i < turnPath.length; i++) {
+                     if (turnPath[i] === matchedRestriction.from) {
+                       turnPath = turnPath.slice(i);
+                       break;
+                     }
+                   }
+                 }

 
 

+                 var turn = pathToTurn(turnPath);

 
 

-       function setSortMembers(params) {
-           return sets(params, 'sortname', tag_sort_members);
-       }
+                 if (turn) {
+                   if (matchedRestriction) {
+                     turn.restrictionID = matchedRestriction.id;
+                     turn.no = matchedRestriction.no;
+                     turn.only = matchedRestriction.only;
+                     turn.direct = matchedRestriction.direct;
+                   }

 
 

+                   turns.push(osmTurn(turn));
+                 }

 
 

-       function clean(params) {
-           return utilObjectOmit(params, ['geometry', 'debounce']);
-       }
+                 if (currPath[0] === currPath[2]) return; // if we made a u-turn - stop here
+               }

 
 

+               if (matchedRestriction && matchedRestriction.end) return; // don't advance any further
+               // which nodes can we step into?

 
 

-       function filterKeys(type) {
-           var count_type = type ? 'count_' + type : 'count_all';
-           return function(d) {
-               return parseFloat(d[count_type]) > 2500 || d.in_wiki;
-           };
-       }
+               var n1 = vgraph.entity(entity.first());
+               var n2 = vgraph.entity(entity.last());
+               var dist = geoSphericalDistance(n1.loc, n2.loc);
+               var nextNodes = [];

 
 

+               if (currPath.length > 1) {
+                 if (dist > maxDistance) return; // the next node is too far

 
 

-       function filterMultikeys(prefix) {
-           return function(d) {
-               // d.key begins with prefix, and d.key contains no additional ':'s
-               var re = new RegExp('^' + prefix + '(.*)$');
-               var matches = d.key.match(re) || [];
-               return (matches.length === 2 && matches[1].indexOf(':') === -1);
-           };
-       }
+                 if (!entity.__via) return; // this way is a leaf / can't be a via
+               }

 
 

+               if (!entity.__oneWay && // bidirectional..
+               keyVertexIds.indexOf(n1.id) !== -1 && // key vertex..
+               currPath.indexOf(n1.id) === -1) {
+                 // haven't seen it yet..
+                 nextNodes.push(n1); // can advance to first node
+               }

 
 

-       function filterValues(allowUpperCase) {
-           return function(d) {
-               if (d.value.match(/[;,]/) !== null) { return false; }  // exclude some punctuation
-               if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) { return false; }  // exclude uppercase letters
-               return parseFloat(d.fraction) > 0.0;
-           };
-       }
+               if (keyVertexIds.indexOf(n2.id) !== -1 && // key vertex..
+               currPath.indexOf(n2.id) === -1) {
+                 // haven't seen it yet..
+                 nextNodes.push(n2); // can advance to last node
+               }

 
 

+               nextNodes.forEach(function (nextNode) {
+                 // gather restrictions FROM this way
+                 var fromRestrictions = vgraph.parentRelations(entity).filter(function (r) {
+                   if (!r.isRestriction()) return false;
+                   var f = r.memberByRole('from');
+                   if (!f || f.id !== entity.id) return false;
+                   var isOnly = /^only_/.test(r.tags.restriction);
+                   if (!isOnly) return true; // `only_` restrictions only matter along the direction of the VIA - #4849

 
 

-       function filterRoles(geometry) {
-           return function(d) {
-               if (d.role === '') { return false; } // exclude empty role
-               if (d.role.match(/[A-Z*;,]/) !== null) { return false; }  // exclude uppercase letters and some punctuation
-               return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
-           };
-       }
+                   var isOnlyVia = false;
+                   var v = r.membersByRole('via');

 
 

+                   if (v.length === 1 && v[0].type === 'node') {
+                     // via node
+                     isOnlyVia = v[0].id === nextNode.id;
+                   } else {
+                     // via way(s)
+                     for (var i = 0; i < v.length; i++) {
+                       if (v[i].type !== 'way') continue;
+                       var viaWay = vgraph.entity(v[i].id);
+
+                       if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
+                         isOnlyVia = true;
+                         break;
+                       }
+                     }
+                   }

 
 

-       function valKey(d) {
-           return {
-               value: d.key,
-               title: d.key
-           };
-       }
+                   return isOnlyVia;
+                 });
+                 step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
+               });
+             }
+           } // assumes path is alternating way-node-way of odd length
+
+
+           function pathToTurn(path) {
+             if (path.length < 3) return;
+             var fromWayId, fromNodeId, fromVertexId;
+             var toWayId, toNodeId, toVertexId;
+             var viaWayIds, viaNodeId, isUturn;
+             fromWayId = path[0];
+             toWayId = path[path.length - 1];
+
+             if (path.length === 3 && fromWayId === toWayId) {
+               // u turn
+               var way = vgraph.entity(fromWayId);
+               if (way.__oneWay) return null;
+               isUturn = true;
+               viaNodeId = fromVertexId = toVertexId = path[1];
+               fromNodeId = toNodeId = adjacentNode(fromWayId, viaNodeId);
+             } else {
+               isUturn = false;
+               fromVertexId = path[1];
+               fromNodeId = adjacentNode(fromWayId, fromVertexId);
+               toVertexId = path[path.length - 2];
+               toNodeId = adjacentNode(toWayId, toVertexId);
+
+               if (path.length === 3) {
+                 viaNodeId = path[1];
+               } else {
+                 viaWayIds = path.filter(function (entityId) {
+                   return entityId[0] === 'w';
+                 });
+                 viaWayIds = viaWayIds.slice(1, viaWayIds.length - 1); // remove first, last
+               }
+             }

 
 

+             return {
+               key: path.join('_'),
+               path: path,
+               from: {
+                 node: fromNodeId,
+                 way: fromWayId,
+                 vertex: fromVertexId
+               },
+               via: {
+                 node: viaNodeId,
+                 ways: viaWayIds
+               },
+               to: {
+                 node: toNodeId,
+                 way: toWayId,
+                 vertex: toVertexId
+               },
+               u: isUturn
+             };

 
 

-       function valKeyDescription(d) {
-           var obj = {
-               value: d.value,
-               title: d.description || d.value
-           };
-           if (d.count) {
-               obj.count = d.count;
+             function adjacentNode(wayId, affixId) {
+               var nodes = vgraph.entity(wayId).nodes;
+               return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
+             }

            }
            }

-           return obj;
-       }
-
+         };

 
 

-       function roleKey(d) {
-           return {
-               value: d.role,
-               title: d.role
-           };
+         return intersection;

        }
        }

+       function osmInferRestriction(graph, turn, projection) {
+         var fromWay = graph.entity(turn.from.way);
+         var fromNode = graph.entity(turn.from.node);
+         var fromVertex = graph.entity(turn.from.vertex);
+         var toWay = graph.entity(turn.to.way);
+         var toNode = graph.entity(turn.to.node);
+         var toVertex = graph.entity(turn.to.vertex);
+         var fromOneWay = fromWay.tags.oneway === 'yes';
+         var toOneWay = toWay.tags.oneway === 'yes';
+         var angle = (geoAngle(fromVertex, fromNode, projection) - geoAngle(toVertex, toNode, projection)) * 180 / Math.PI;
+
+         while (angle < 0) {
+           angle += 360;
+         }

 
 

+         if (fromNode === toNode) {
+           return 'no_u_turn';
+         }

 
 

-       // sort keys with ':' lower than keys without ':'
-       function sortKeys(a, b) {
-           return (a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1) ? -1
-               : (a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1) ? 1
-               : 0;
-       }
+         if ((angle < 23 || angle > 336) && fromOneWay && toOneWay) {
+           return 'no_u_turn'; // wider tolerance for u-turn if both ways are oneway
+         }

 
 

+         if ((angle < 40 || angle > 319) && fromOneWay && toOneWay && turn.from.vertex !== turn.to.vertex) {
+           return 'no_u_turn'; // even wider tolerance for u-turn if there is a via way (from !== to)
+         }

 
 

-       var debouncedRequest$1 = debounce(request$1, 300, { leading: false });
+         if (angle < 158) {
+           return 'no_right_turn';
+         }

 
 

-       function request$1(url, params, exactMatch, callback, loaded) {
-           if (_inflight$2[url]) { return; }
+         if (angle > 202) {
+           return 'no_left_turn';
+         }

 
 

-           if (checkCache(url, params, exactMatch, callback)) { return; }
+         return 'no_straight_on';
+       }

 
 

-           var controller = new AbortController();
-           _inflight$2[url] = controller;
+       function actionMergePolygon(ids, newRelationId) {
+         function groupEntities(graph) {
+           var entities = ids.map(function (id) {
+             return graph.entity(id);
+           });
+           var geometryGroups = utilArrayGroupBy(entities, function (entity) {
+             if (entity.type === 'way' && entity.isClosed()) {
+               return 'closedWay';
+             } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+               return 'multipolygon';
+             } else {
+               return 'other';
+             }
+           });
+           return Object.assign({
+             closedWay: [],
+             multipolygon: [],
+             other: []
+           }, geometryGroups);
+         }

 
 

-           d3_json(url, { signal: controller.signal })
-               .then(function(result) {
-                   delete _inflight$2[url];
-                   if (loaded) { loaded(null, result); }
-               })
-               .catch(function(err) {
-                   delete _inflight$2[url];
-                   if (err.name === 'AbortError') { return; }
-                   if (loaded) { loaded(err.message); }
-               });
-       }
+         var action = function action(graph) {
+           var entities = groupEntities(graph); // An array representing all the polygons that are part of the multipolygon.
+           //
+           // Each element is itself an array of objects with an id property, and has a
+           // locs property which is an array of the locations forming the polygon.
+
+           var polygons = entities.multipolygon.reduce(function (polygons, m) {
+             return polygons.concat(osmJoinWays(m.members, graph));
+           }, []).concat(entities.closedWay.map(function (d) {
+             var member = [{
+               id: d.id
+             }];
+             member.nodes = graph.childNodes(d);
+             return member;
+           })); // contained is an array of arrays of boolean values,
+           // where contained[j][k] is true iff the jth way is
+           // contained by the kth way.
+
+           var contained = polygons.map(function (w, i) {
+             return polygons.map(function (d, n) {
+               if (i === n) return null;
+               return geoPolygonContainsPolygon(d.nodes.map(function (n) {
+                 return n.loc;
+               }), w.nodes.map(function (n) {
+                 return n.loc;
+               }));
+             });
+           }); // Sort all polygons as either outer or inner ways

 
 

+           var members = [];
+           var outer = true;

 
 

-       function checkCache(url, params, exactMatch, callback) {
-           var rp = params.rp || 25;
-           var testQuery = params.query || '';
-           var testUrl = url;
+           while (polygons.length) {
+             extractUncontained(polygons);
+             polygons = polygons.filter(isContained);
+             contained = contained.filter(isContained).map(filterContained);
+           }

 
 

-           do {
-               var hit = _taginfoCache[testUrl];
+           function isContained(d, i) {
+             return contained[i].some(function (val) {
+               return val;
+             });
+           }

 
 

-               // exact match, or shorter match yielding fewer than max results (rp)
-               if (hit && (url === testUrl || hit.length < rp)) {
-                   callback(null, hit);
-                   return true;
+           function filterContained(d) {
+             return d.filter(isContained);
+           }
+
+           function extractUncontained(polygons) {
+             polygons.forEach(function (d, i) {
+               if (!isContained(d, i)) {
+                 d.forEach(function (member) {
+                   members.push({
+                     type: 'way',
+                     id: member.id,
+                     role: outer ? 'outer' : 'inner'
+                   });
+                 });

                }
                }

+             });
+             outer = !outer;
+           } // Move all tags to one relation

 
 

-               // don't try to shorten the query
-               if (exactMatch || !testQuery.length) { return false; }

 
 

-               // do shorten the query to see if we already have a cached result
-               // that has returned fewer than max results (rp)
-               testQuery = testQuery.slice(0, -1);
-               testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
-           } while (testQuery.length >= 0);
+           var relation = entities.multipolygon[0] || osmRelation({
+             id: newRelationId,
+             tags: {
+               type: 'multipolygon'
+             }
+           });
+           entities.multipolygon.slice(1).forEach(function (m) {
+             relation = relation.mergeTags(m.tags);
+             graph = graph.remove(m);
+           });
+           entities.closedWay.forEach(function (way) {
+             function isThisOuter(m) {
+               return m.id === way.id && m.role !== 'inner';
+             }

 
 

-           return false;
-       }
+             if (members.some(isThisOuter)) {
+               relation = relation.mergeTags(way.tags);
+               graph = graph.replace(way.update({
+                 tags: {}
+               }));
+             }
+           });
+           return graph.replace(relation.update({
+             members: members,
+             tags: utilObjectOmit(relation.tags, ['area'])
+           }));
+         };

 
 

+         action.disabled = function (graph) {
+           var entities = groupEntities(graph);

 
 

-       var serviceTaginfo = {
+           if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
+             return 'not_eligible';
+           }

 
 

-           init: function() {
-               _inflight$2 = {};
-               _taginfoCache = {};
-               _popularKeys = {
-                   // manually exclude some keys – #5377, #7485
-                   postal_code: true,
-                   full_name: true,
-                   loc_name: true,
-                   reg_name: true,
-                   short_name: true,
-                   sorting_name: true,
-                   artist_name: true,
-                   nat_name: true,
-                   long_name: true,
-                   'bridge:name': true
-               };
+           if (!entities.multipolygon.every(function (r) {
+             return r.isComplete(graph);
+           })) {
+             return 'incomplete_relation';
+           }

 
 

-               // Fetch popular keys.  We'll exclude these from `values`
-               // lookups because they stress taginfo, and they aren't likely
-               // to yield meaningful autocomplete results.. see #3955
-               var params = {
-                   rp: 100,
-                   sortname: 'values_all',
-                   sortorder: 'desc',
-                   page: 1,
-                   debounce: false,
-                   lang: _mainLocalizer.languageCode()
-               };
-               this.keys(params, function(err, data) {
-                   if (err) { return; }
-                   data.forEach(function(d) {
-                       if (d.value === 'opening_hours') { return; }  // exception
-                       _popularKeys[d.value] = true;
-                   });
-               });
-           },
+           if (!entities.multipolygon.length) {
+             var sharedMultipolygons = [];
+             entities.closedWay.forEach(function (way, i) {
+               if (i === 0) {
+                 sharedMultipolygons = graph.parentMultipolygons(way);
+               } else {
+                 sharedMultipolygons = utilArrayIntersection(sharedMultipolygons, graph.parentMultipolygons(way));
+               }
+             });
+             sharedMultipolygons = sharedMultipolygons.filter(function (relation) {
+               return relation.members.length === entities.closedWay.length;
+             });

 
 

+             if (sharedMultipolygons.length) {
+               // don't create a new multipolygon if it'd be redundant
+               return 'not_eligible';
+             }
+           } else if (entities.closedWay.some(function (way) {
+             return utilArrayIntersection(graph.parentMultipolygons(way), entities.multipolygon).length;
+           })) {
+             // don't add a way to a multipolygon again if it's already a member
+             return 'not_eligible';
+           }
+         };

 
 

-           reset: function() {
-               Object.values(_inflight$2).forEach(function(controller) { controller.abort(); });
-               _inflight$2 = {};
-           },
+         return action;
+       }

 
 

+       var DESCRIPTORS = descriptors;
+       var objectDefinePropertyModule = objectDefineProperty;
+       var regExpFlags = regexpFlags$1;
+       var fails$4 = fails$N;

 
 

-           keys: function(params, callback) {
-               var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-               params = clean(setSort(params));
-               params = Object.assign({
-                   rp: 10,
-                   sortname: 'count_all',
-                   sortorder: 'desc',
-                   page: 1,
-                   lang: _mainLocalizer.languageCode()
-               }, params);
+       var FORCED$2 = DESCRIPTORS && fails$4(function () {
+         // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+         return Object.getOwnPropertyDescriptor(RegExp.prototype, 'flags').get.call({ dotAll: true, sticky: true }) !== 'sy';
+       });

 
 

-               var url = apibase$4 + 'keys/all?' + utilQsString(params);
-               doRequest(url, params, false, callback, function(err, d) {
-                   if (err) {
-                       callback(err);
-                   } else {
-                       var f = filterKeys(params.filter);
-                       var result = d.data.filter(f).sort(sortKeys).map(valKey);
-                       _taginfoCache[url] = result;
-                       callback(null, result);
-                   }
-               });
-           },
+       // `RegExp.prototype.flags` getter
+       // https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
+       if (FORCED$2) objectDefinePropertyModule.f(RegExp.prototype, 'flags', {
+         configurable: true,
+         get: regExpFlags
+       });

 
 

+       var fastDeepEqual = function equal(a, b) {
+         if (a === b) return true;

 
 

-           multikeys: function(params, callback) {
-               var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-               params = clean(setSort(params));
-               params = Object.assign({
-                   rp: 25,
-                   sortname: 'count_all',
-                   sortorder: 'desc',
-                   page: 1,
-                   lang: _mainLocalizer.languageCode()
-               }, params);
-
-               var prefix = params.query;
-               var url = apibase$4 + 'keys/all?' + utilQsString(params);
-               doRequest(url, params, true, callback, function(err, d) {
-                   if (err) {
-                       callback(err);
-                   } else {
-                       var f = filterMultikeys(prefix);
-                       var result = d.data.filter(f).map(valKey);
-                       _taginfoCache[url] = result;
-                       callback(null, result);
-                   }
-               });
-           },
+         if (a && b && _typeof(a) == 'object' && _typeof(b) == 'object') {
+           if (a.constructor !== b.constructor) return false;
+           var length, i, keys;

 
 

+           if (Array.isArray(a)) {
+             length = a.length;
+             if (length != b.length) return false;

 
 

-           values: function(params, callback) {
-               // Exclude popular keys from values lookups.. see #3955
-               var key = params.key;
-               if (key && _popularKeys[key]) {
-                   callback(null, []);
-                   return;
-               }
+             for (i = length; i-- !== 0;) {
+               if (!equal(a[i], b[i])) return false;
+             }

 
 

-               var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-               params = clean(setSort(setFilter(params)));
-               params = Object.assign({
-                   rp: 25,
-                   sortname: 'count_all',
-                   sortorder: 'desc',
-                   page: 1,
-                   lang: _mainLocalizer.languageCode()
-               }, params);
+             return true;
+           }

 
 

-               var url = apibase$4 + 'key/values?' + utilQsString(params);
-               doRequest(url, params, false, callback, function(err, d) {
-                   if (err) {
-                       callback(err);
-                   } else {
-                       // In most cases we prefer taginfo value results with lowercase letters.
-                       // A few OSM keys expect values to contain uppercase values (see #3377).
-                       // This is not an exhaustive list (e.g. `name` also has uppercase values)
-                       // but these are the fields where taginfo value lookup is most useful.
-                       var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery/;
-                       var allowUpperCase = re.test(params.key);
-                       var f = filterValues(allowUpperCase);
-
-                       var result = d.data.filter(f).map(valKeyDescription);
-                       _taginfoCache[url] = result;
-                       callback(null, result);
-                   }
-               });
-           },
+           if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
+           if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
+           if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();
+           keys = Object.keys(a);
+           length = keys.length;
+           if (length !== Object.keys(b).length) return false;

 
 

+           for (i = length; i-- !== 0;) {
+             if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
+           }

 
 

-           roles: function(params, callback) {
-               var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-               var geometry = params.geometry;
-               params = clean(setSortMembers(params));
-               params = Object.assign({
-                   rp: 25,
-                   sortname: 'count_all_members',
-                   sortorder: 'desc',
-                   page: 1,
-                   lang: _mainLocalizer.languageCode()
-               }, params);
-
-               var url = apibase$4 + 'relation/roles?' + utilQsString(params);
-               doRequest(url, params, true, callback, function(err, d) {
-                   if (err) {
-                       callback(err);
-                   } else {
-                       var f = filterRoles(geometry);
-                       var result = d.data.filter(f).map(roleKey);
-                       _taginfoCache[url] = result;
-                       callback(null, result);
-                   }
-               });
-           },
+           for (i = length; i-- !== 0;) {
+             var key = keys[i];
+             if (!equal(a[key], b[key])) return false;
+           }

 
 

+           return true;
+         } // true if both NaN, false otherwise

 
 

-           docs: function(params, callback) {
-               var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-               params = clean(setSort(params));

 
 

-               var path = 'key/wiki_pages?';
-               if (params.value) {
-                   path = 'tag/wiki_pages?';
-               } else if (params.rtype) {
-                   path = 'relation/wiki_pages?';
-               }
+         return a !== a && b !== b;
+       };

 
 

-               var url = apibase$4 + path + utilQsString(params);
-               doRequest(url, params, true, callback, function(err, d) {
-                   if (err) {
-                       callback(err);
-                   } else {
-                       _taginfoCache[url] = d.data;
-                       callback(null, d.data);
-                   }
-               });
-           },
+       // J. W. Hunt and M. D. McIlroy, An algorithm for differential buffer
+       // comparison, Bell Telephone Laboratories CSTR #41 (1976)
+       // http://www.cs.dartmouth.edu/~doug/
+       // https://en.wikipedia.org/wiki/Longest_common_subsequence_problem
+       //
+       // Expects two arrays, finds longest common sequence

 
 

+       function LCS(buffer1, buffer2) {
+         var equivalenceClasses = {};

 
 

-           apibase: function(_) {
-               if (!arguments.length) { return apibase$4; }
-               apibase$4 = _;
-               return this;
+         for (var j = 0; j < buffer2.length; j++) {
+           var item = buffer2[j];
+
+           if (equivalenceClasses[item]) {
+             equivalenceClasses[item].push(j);
+           } else {
+             equivalenceClasses[item] = [j];

            }
            }

+         }

 
 

-       };
+         var NULLRESULT = {
+           buffer1index: -1,
+           buffer2index: -1,
+           chain: null
+         };
+         var candidates = [NULLRESULT];

 
 

-       var helpers$1 = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
-       /**
-        * @module helpers
-        */
-       /**
-        * Earth Radius used with the Harvesine formula and approximates using a spherical (non-ellipsoid) Earth.
-        *
-        * @memberof helpers
-        * @type {number}
-        */
-       exports.earthRadius = 6371008.8;
-       /**
-        * Unit of measurement factors using a spherical (non-ellipsoid) earth radius.
-        *
-        * @memberof helpers
-        * @type {Object}
-        */
-       exports.factors = {
-           centimeters: exports.earthRadius * 100,
-           centimetres: exports.earthRadius * 100,
-           degrees: exports.earthRadius / 111325,
-           feet: exports.earthRadius * 3.28084,
-           inches: exports.earthRadius * 39.370,
-           kilometers: exports.earthRadius / 1000,
-           kilometres: exports.earthRadius / 1000,
-           meters: exports.earthRadius,
-           metres: exports.earthRadius,
-           miles: exports.earthRadius / 1609.344,
-           millimeters: exports.earthRadius * 1000,
-           millimetres: exports.earthRadius * 1000,
-           nauticalmiles: exports.earthRadius / 1852,
-           radians: 1,
-           yards: exports.earthRadius / 1.0936,
-       };
-       /**
-        * Units of measurement factors based on 1 meter.
-        *
-        * @memberof helpers
-        * @type {Object}
-        */
-       exports.unitsFactors = {
-           centimeters: 100,
-           centimetres: 100,
-           degrees: 1 / 111325,
-           feet: 3.28084,
-           inches: 39.370,
-           kilometers: 1 / 1000,
-           kilometres: 1 / 1000,
-           meters: 1,
-           metres: 1,
-           miles: 1 / 1609.344,
-           millimeters: 1000,
-           millimetres: 1000,
-           nauticalmiles: 1 / 1852,
-           radians: 1 / exports.earthRadius,
-           yards: 1 / 1.0936,
-       };
-       /**
-        * Area of measurement factors based on 1 square meter.
-        *
-        * @memberof helpers
-        * @type {Object}
-        */
-       exports.areaFactors = {
-           acres: 0.000247105,
-           centimeters: 10000,
-           centimetres: 10000,
-           feet: 10.763910417,
-           inches: 1550.003100006,
-           kilometers: 0.000001,
-           kilometres: 0.000001,
-           meters: 1,
-           metres: 1,
-           miles: 3.86e-7,
-           millimeters: 1000000,
-           millimetres: 1000000,
-           yards: 1.195990046,
-       };
-       /**
-        * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
-        *
-        * @name feature
-        * @param {Geometry} geometry input geometry
-        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-        * @param {Object} [options={}] Optional Parameters
-        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-        * @param {string|number} [options.id] Identifier associated with the Feature
-        * @returns {Feature} a GeoJSON Feature
-        * @example
-        * var geometry = {
-        *   "type": "Point",
-        *   "coordinates": [110, 50]
-        * };
-        *
-        * var feature = turf.feature(geometry);
-        *
-        * //=feature
-        */
-       function feature(geom, properties, options) {
-           if (options === void 0) { options = {}; }
-           var feat = { type: "Feature" };
-           if (options.id === 0 || options.id) {
-               feat.id = options.id;
-           }
-           if (options.bbox) {
-               feat.bbox = options.bbox;
-           }
-           feat.properties = properties || {};
-           feat.geometry = geom;
-           return feat;
-       }
-       exports.feature = feature;
-       /**
-        * Creates a GeoJSON {@link Geometry} from a Geometry string type & coordinates.
-        * For GeometryCollection type use `helpers.geometryCollection`
-        *
-        * @name geometry
-        * @param {string} type Geometry Type
-        * @param {Array<any>} coordinates Coordinates
-        * @param {Object} [options={}] Optional Parameters
-        * @returns {Geometry} a GeoJSON Geometry
-        * @example
-        * var type = "Point";
-        * var coordinates = [110, 50];
-        * var geometry = turf.geometry(type, coordinates);
-        * // => geometry
-        */
-       function geometry(type, coordinates, options) {
-           switch (type) {
-               case "Point": return point(coordinates).geometry;
-               case "LineString": return lineString(coordinates).geometry;
-               case "Polygon": return polygon(coordinates).geometry;
-               case "MultiPoint": return multiPoint(coordinates).geometry;
-               case "MultiLineString": return multiLineString(coordinates).geometry;
-               case "MultiPolygon": return multiPolygon(coordinates).geometry;
-               default: throw new Error(type + " is invalid");
-           }
-       }
-       exports.geometry = geometry;
-       /**
-        * Creates a {@link Point} {@link Feature} from a Position.
-        *
-        * @name point
-        * @param {Array<number>} coordinates longitude, latitude position (each in decimal degrees)
-        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-        * @param {Object} [options={}] Optional Parameters
-        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-        * @param {string|number} [options.id] Identifier associated with the Feature
-        * @returns {Feature<Point>} a Point feature
-        * @example
-        * var point = turf.point([-75.343, 39.984]);
-        *
-        * //=point
-        */
-       function point(coordinates, properties, options) {
-           if (options === void 0) { options = {}; }
-           var geom = {
-               type: "Point",
-               coordinates: coordinates,
-           };
-           return feature(geom, properties, options);
-       }
-       exports.point = point;
-       /**
-        * Creates a {@link Point} {@link FeatureCollection} from an Array of Point coordinates.
-        *
-        * @name points
-        * @param {Array<Array<number>>} coordinates an array of Points
-        * @param {Object} [properties={}] Translate these properties to each Feature
-        * @param {Object} [options={}] Optional Parameters
-        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]
-        * associated with the FeatureCollection
-        * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-        * @returns {FeatureCollection<Point>} Point Feature
-        * @example
-        * var points = turf.points([
-        *   [-75, 39],
-        *   [-80, 45],
-        *   [-78, 50]
-        * ]);
-        *
-        * //=points
-        */
-       function points(coordinates, properties, options) {
-           if (options === void 0) { options = {}; }
-           return featureCollection(coordinates.map(function (coords) {
-               return point(coords, properties);
-           }), options);
-       }
-       exports.points = points;
-       /**
-        * Creates a {@link Polygon} {@link Feature} from an Array of LinearRings.
-        *
-        * @name polygon
-        * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
-        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-        * @param {Object} [options={}] Optional Parameters
-        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-        * @param {string|number} [options.id] Identifier associated with the Feature
-        * @returns {Feature<Polygon>} Polygon Feature
-        * @example
-        * var polygon = turf.polygon([[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]], { name: 'poly1' });
-        *
-        * //=polygon
-        */
-       function polygon(coordinates, properties, options) {
-           if (options === void 0) { options = {}; }
-           for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
-               var ring = coordinates_1[_i];
-               if (ring.length < 4) {
-                   throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
-               }
-               for (var j = 0; j < ring[ring.length - 1].length; j++) {
-                   // Check if first point of Polygon contains two numbers
-                   if (ring[ring.length - 1][j] !== ring[0][j]) {
-                       throw new Error("First and last Position are not equivalent.");
-                   }
-               }
-           }
-           var geom = {
-               type: "Polygon",
-               coordinates: coordinates,
-           };
-           return feature(geom, properties, options);
-       }
-       exports.polygon = polygon;
-       /**
-        * Creates a {@link Polygon} {@link FeatureCollection} from an Array of Polygon coordinates.
-        *
-        * @name polygons
-        * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygon coordinates
-        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-        * @param {Object} [options={}] Optional Parameters
-        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-        * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-        * @returns {FeatureCollection<Polygon>} Polygon FeatureCollection
-        * @example
-        * var polygons = turf.polygons([
-        *   [[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]],
-        *   [[[-15, 42], [-14, 46], [-12, 41], [-17, 44], [-15, 42]]],
-        * ]);
-        *
-        * //=polygons
-        */
-       function polygons(coordinates, properties, options) {
-           if (options === void 0) { options = {}; }
-           return featureCollection(coordinates.map(function (coords) {
-               return polygon(coords, properties);
-           }), options);
-       }
-       exports.polygons = polygons;
-       /**
-        * Creates a {@link LineString} {@link Feature} from an Array of Positions.
-        *
-        * @name lineString
-        * @param {Array<Array<number>>} coordinates an array of Positions
-        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-        * @param {Object} [options={}] Optional Parameters
-        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-        * @param {string|number} [options.id] Identifier associated with the Feature
-        * @returns {Feature<LineString>} LineString Feature
-        * @example
-        * var linestring1 = turf.lineString([[-24, 63], [-23, 60], [-25, 65], [-20, 69]], {name: 'line 1'});
-        * var linestring2 = turf.lineString([[-14, 43], [-13, 40], [-15, 45], [-10, 49]], {name: 'line 2'});
-        *
-        * //=linestring1
-        * //=linestring2
-        */
-       function lineString(coordinates, properties, options) {
-           if (options === void 0) { options = {}; }
-           if (coordinates.length < 2) {
-               throw new Error("coordinates must be an array of two or more positions");
-           }
-           var geom = {
-               type: "LineString",
-               coordinates: coordinates,
-           };
-           return feature(geom, properties, options);
-       }
-       exports.lineString = lineString;
-       /**
-        * Creates a {@link LineString} {@link FeatureCollection} from an Array of LineString coordinates.
-        *
-        * @name lineStrings
-        * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
-        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-        * @param {Object} [options={}] Optional Parameters
-        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]
-        * associated with the FeatureCollection
-        * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-        * @returns {FeatureCollection<LineString>} LineString FeatureCollection
-        * @example
-        * var linestrings = turf.lineStrings([
-        *   [[-24, 63], [-23, 60], [-25, 65], [-20, 69]],
-        *   [[-14, 43], [-13, 40], [-15, 45], [-10, 49]]
-        * ]);
-        *
-        * //=linestrings
-        */
-       function lineStrings(coordinates, properties, options) {
-           if (options === void 0) { options = {}; }
-           return featureCollection(coordinates.map(function (coords) {
-               return lineString(coords, properties);
-           }), options);
-       }
-       exports.lineStrings = lineStrings;
-       /**
-        * Takes one or more {@link Feature|Features} and creates a {@link FeatureCollection}.
-        *
-        * @name featureCollection
-        * @param {Feature[]} features input features
-        * @param {Object} [options={}] Optional Parameters
-        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-        * @param {string|number} [options.id] Identifier associated with the Feature
-        * @returns {FeatureCollection} FeatureCollection of Features
-        * @example
-        * var locationA = turf.point([-75.343, 39.984], {name: 'Location A'});
-        * var locationB = turf.point([-75.833, 39.284], {name: 'Location B'});
-        * var locationC = turf.point([-75.534, 39.123], {name: 'Location C'});
-        *
-        * var collection = turf.featureCollection([
-        *   locationA,
-        *   locationB,
-        *   locationC
-        * ]);
-        *
-        * //=collection
-        */
-       function featureCollection(features, options) {
-           if (options === void 0) { options = {}; }
-           var fc = { type: "FeatureCollection" };
-           if (options.id) {
-               fc.id = options.id;
-           }
-           if (options.bbox) {
-               fc.bbox = options.bbox;
-           }
-           fc.features = features;
-           return fc;
-       }
-       exports.featureCollection = featureCollection;
-       /**
-        * Creates a {@link Feature<MultiLineString>} based on a
-        * coordinate array. Properties can be added optionally.
-        *
-        * @name multiLineString
-        * @param {Array<Array<Array<number>>>} coordinates an array of LineStrings
-        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-        * @param {Object} [options={}] Optional Parameters
-        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-        * @param {string|number} [options.id] Identifier associated with the Feature
-        * @returns {Feature<MultiLineString>} a MultiLineString feature
-        * @throws {Error} if no coordinates are passed
-        * @example
-        * var multiLine = turf.multiLineString([[[0,0],[10,10]]]);
-        *
-        * //=multiLine
-        */
-       function multiLineString(coordinates, properties, options) {
-           if (options === void 0) { options = {}; }
-           var geom = {
-               type: "MultiLineString",
-               coordinates: coordinates,
-           };
-           return feature(geom, properties, options);
-       }
-       exports.multiLineString = multiLineString;
-       /**
-        * Creates a {@link Feature<MultiPoint>} based on a
-        * coordinate array. Properties can be added optionally.
-        *
-        * @name multiPoint
-        * @param {Array<Array<number>>} coordinates an array of Positions
-        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-        * @param {Object} [options={}] Optional Parameters
-        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-        * @param {string|number} [options.id] Identifier associated with the Feature
-        * @returns {Feature<MultiPoint>} a MultiPoint feature
-        * @throws {Error} if no coordinates are passed
-        * @example
-        * var multiPt = turf.multiPoint([[0,0],[10,10]]);
-        *
-        * //=multiPt
-        */
-       function multiPoint(coordinates, properties, options) {
-           if (options === void 0) { options = {}; }
-           var geom = {
-               type: "MultiPoint",
-               coordinates: coordinates,
-           };
-           return feature(geom, properties, options);
-       }
-       exports.multiPoint = multiPoint;
-       /**
-        * Creates a {@link Feature<MultiPolygon>} based on a
-        * coordinate array. Properties can be added optionally.
-        *
-        * @name multiPolygon
-        * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygons
-        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-        * @param {Object} [options={}] Optional Parameters
-        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-        * @param {string|number} [options.id] Identifier associated with the Feature
-        * @returns {Feature<MultiPolygon>} a multipolygon feature
-        * @throws {Error} if no coordinates are passed
-        * @example
-        * var multiPoly = turf.multiPolygon([[[[0,0],[0,10],[10,10],[10,0],[0,0]]]]);
-        *
-        * //=multiPoly
-        *
-        */
-       function multiPolygon(coordinates, properties, options) {
-           if (options === void 0) { options = {}; }
-           var geom = {
-               type: "MultiPolygon",
-               coordinates: coordinates,
-           };
-           return feature(geom, properties, options);
-       }
-       exports.multiPolygon = multiPolygon;
-       /**
-        * Creates a {@link Feature<GeometryCollection>} based on a
-        * coordinate array. Properties can be added optionally.
-        *
-        * @name geometryCollection
-        * @param {Array<Geometry>} geometries an array of GeoJSON Geometries
-        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-        * @param {Object} [options={}] Optional Parameters
-        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-        * @param {string|number} [options.id] Identifier associated with the Feature
-        * @returns {Feature<GeometryCollection>} a GeoJSON GeometryCollection Feature
-        * @example
-        * var pt = turf.geometry("Point", [100, 0]);
-        * var line = turf.geometry("LineString", [[101, 0], [102, 1]]);
-        * var collection = turf.geometryCollection([pt, line]);
-        *
-        * // => collection
-        */
-       function geometryCollection(geometries, properties, options) {
-           if (options === void 0) { options = {}; }
-           var geom = {
-               type: "GeometryCollection",
-               geometries: geometries,
-           };
-           return feature(geom, properties, options);
-       }
-       exports.geometryCollection = geometryCollection;
-       /**
-        * Round number to precision
-        *
-        * @param {number} num Number
-        * @param {number} [precision=0] Precision
-        * @returns {number} rounded number
-        * @example
-        * turf.round(120.4321)
-        * //=120
-        *
-        * turf.round(120.4321, 2)
-        * //=120.43
-        */
-       function round(num, precision) {
-           if (precision === void 0) { precision = 0; }
-           if (precision && !(precision >= 0)) {
-               throw new Error("precision must be a positive number");
-           }
-           var multiplier = Math.pow(10, precision || 0);
-           return Math.round(num * multiplier) / multiplier;
-       }
-       exports.round = round;
-       /**
-        * Convert a distance measurement (assuming a spherical Earth) from radians to a more friendly unit.
-        * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-        *
-        * @name radiansToLength
-        * @param {number} radians in radians across the sphere
-        * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-        * meters, kilometres, kilometers.
-        * @returns {number} distance
-        */
-       function radiansToLength(radians, units) {
-           if (units === void 0) { units = "kilometers"; }
-           var factor = exports.factors[units];
-           if (!factor) {
-               throw new Error(units + " units is invalid");
-           }
-           return radians * factor;
-       }
-       exports.radiansToLength = radiansToLength;
-       /**
-        * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into radians
-        * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-        *
-        * @name lengthToRadians
-        * @param {number} distance in real units
-        * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-        * meters, kilometres, kilometers.
-        * @returns {number} radians
-        */
-       function lengthToRadians(distance, units) {
-           if (units === void 0) { units = "kilometers"; }
-           var factor = exports.factors[units];
-           if (!factor) {
-               throw new Error(units + " units is invalid");
-           }
-           return distance / factor;
-       }
-       exports.lengthToRadians = lengthToRadians;
-       /**
-        * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into degrees
-        * Valid units: miles, nauticalmiles, inches, yards, meters, metres, centimeters, kilometres, feet
-        *
-        * @name lengthToDegrees
-        * @param {number} distance in real units
-        * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-        * meters, kilometres, kilometers.
-        * @returns {number} degrees
-        */
-       function lengthToDegrees(distance, units) {
-           return radiansToDegrees(lengthToRadians(distance, units));
-       }
-       exports.lengthToDegrees = lengthToDegrees;
-       /**
-        * Converts any bearing angle from the north line direction (positive clockwise)
-        * and returns an angle between 0-360 degrees (positive clockwise), 0 being the north line
-        *
-        * @name bearingToAzimuth
-        * @param {number} bearing angle, between -180 and +180 degrees
-        * @returns {number} angle between 0 and 360 degrees
-        */
-       function bearingToAzimuth(bearing) {
-           var angle = bearing % 360;
-           if (angle < 0) {
-               angle += 360;
-           }
-           return angle;
-       }
-       exports.bearingToAzimuth = bearingToAzimuth;
-       /**
-        * Converts an angle in radians to degrees
-        *
-        * @name radiansToDegrees
-        * @param {number} radians angle in radians
-        * @returns {number} degrees between 0 and 360 degrees
-        */
-       function radiansToDegrees(radians) {
-           var degrees = radians % (2 * Math.PI);
-           return degrees * 180 / Math.PI;
-       }
-       exports.radiansToDegrees = radiansToDegrees;
-       /**
-        * Converts an angle in degrees to radians
-        *
-        * @name degreesToRadians
-        * @param {number} degrees angle between 0 and 360 degrees
-        * @returns {number} angle in radians
-        */
-       function degreesToRadians(degrees) {
-           var radians = degrees % 360;
-           return radians * Math.PI / 180;
-       }
-       exports.degreesToRadians = degreesToRadians;
-       /**
-        * Converts a length to the requested unit.
-        * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-        *
-        * @param {number} length to be converted
-        * @param {Units} [originalUnit="kilometers"] of the length
-        * @param {Units} [finalUnit="kilometers"] returned unit
-        * @returns {number} the converted length
-        */
-       function convertLength(length, originalUnit, finalUnit) {
-           if (originalUnit === void 0) { originalUnit = "kilometers"; }
-           if (finalUnit === void 0) { finalUnit = "kilometers"; }
-           if (!(length >= 0)) {
-               throw new Error("length must be a positive number");
-           }
-           return radiansToLength(lengthToRadians(length, originalUnit), finalUnit);
-       }
-       exports.convertLength = convertLength;
-       /**
-        * Converts a area to the requested unit.
-        * Valid units: kilometers, kilometres, meters, metres, centimetres, millimeters, acres, miles, yards, feet, inches
-        * @param {number} area to be converted
-        * @param {Units} [originalUnit="meters"] of the distance
-        * @param {Units} [finalUnit="kilometers"] returned unit
-        * @returns {number} the converted distance
-        */
-       function convertArea(area, originalUnit, finalUnit) {
-           if (originalUnit === void 0) { originalUnit = "meters"; }
-           if (finalUnit === void 0) { finalUnit = "kilometers"; }
-           if (!(area >= 0)) {
-               throw new Error("area must be a positive number");
-           }
-           var startFactor = exports.areaFactors[originalUnit];
-           if (!startFactor) {
-               throw new Error("invalid original units");
-           }
-           var finalFactor = exports.areaFactors[finalUnit];
-           if (!finalFactor) {
-               throw new Error("invalid final units");
-           }
-           return (area / startFactor) * finalFactor;
-       }
-       exports.convertArea = convertArea;
-       /**
-        * isNumber
-        *
-        * @param {*} num Number to validate
-        * @returns {boolean} true/false
-        * @example
-        * turf.isNumber(123)
-        * //=true
-        * turf.isNumber('foo')
-        * //=false
-        */
-       function isNumber(num) {
-           return !isNaN(num) && num !== null && !Array.isArray(num) && !/^\s*$/.test(num);
-       }
-       exports.isNumber = isNumber;
-       /**
-        * isObject
-        *
-        * @param {*} input variable to validate
-        * @returns {boolean} true/false
-        * @example
-        * turf.isObject({elevation: 10})
-        * //=true
-        * turf.isObject('foo')
-        * //=false
-        */
-       function isObject(input) {
-           return (!!input) && (input.constructor === Object);
-       }
-       exports.isObject = isObject;
-       /**
-        * Validate BBox
-        *
-        * @private
-        * @param {Array<number>} bbox BBox to validate
-        * @returns {void}
-        * @throws Error if BBox is not valid
-        * @example
-        * validateBBox([-180, -40, 110, 50])
-        * //=OK
-        * validateBBox([-180, -40])
-        * //=Error
-        * validateBBox('Foo')
-        * //=Error
-        * validateBBox(5)
-        * //=Error
-        * validateBBox(null)
-        * //=Error
-        * validateBBox(undefined)
-        * //=Error
-        */
-       function validateBBox(bbox) {
-           if (!bbox) {
-               throw new Error("bbox is required");
-           }
-           if (!Array.isArray(bbox)) {
-               throw new Error("bbox must be an Array");
-           }
-           if (bbox.length !== 4 && bbox.length !== 6) {
-               throw new Error("bbox must be an Array of 4 or 6 numbers");
-           }
-           bbox.forEach(function (num) {
-               if (!isNumber(num)) {
-                   throw new Error("bbox must only contain numbers");
-               }
-           });
-       }
-       exports.validateBBox = validateBBox;
-       /**
-        * Validate Id
-        *
-        * @private
-        * @param {string|number} id Id to validate
-        * @returns {void}
-        * @throws Error if Id is not valid
-        * @example
-        * validateId([-180, -40, 110, 50])
-        * //=Error
-        * validateId([-180, -40])
-        * //=Error
-        * validateId('Foo')
-        * //=OK
-        * validateId(5)
-        * //=OK
-        * validateId(null)
-        * //=Error
-        * validateId(undefined)
-        * //=Error
-        */
-       function validateId(id) {
-           if (!id) {
-               throw new Error("id is required");
-           }
-           if (["string", "number"].indexOf(typeof id) === -1) {
-               throw new Error("id must be a number or a string");
-           }
-       }
-       exports.validateId = validateId;
-       // Deprecated methods
-       function radians2degrees() {
-           throw new Error("method has been renamed to `radiansToDegrees`");
-       }
-       exports.radians2degrees = radians2degrees;
-       function degrees2radians() {
-           throw new Error("method has been renamed to `degreesToRadians`");
-       }
-       exports.degrees2radians = degrees2radians;
-       function distanceToDegrees() {
-           throw new Error("method has been renamed to `lengthToDegrees`");
-       }
-       exports.distanceToDegrees = distanceToDegrees;
-       function distanceToRadians() {
-           throw new Error("method has been renamed to `lengthToRadians`");
-       }
-       exports.distanceToRadians = distanceToRadians;
-       function radiansToDistance() {
-           throw new Error("method has been renamed to `radiansToLength`");
-       }
-       exports.radiansToDistance = radiansToDistance;
-       function bearingToAngle() {
-           throw new Error("method has been renamed to `bearingToAzimuth`");
-       }
-       exports.bearingToAngle = bearingToAngle;
-       function convertDistance() {
-           throw new Error("method has been renamed to `convertLength`");
-       }
-       exports.convertDistance = convertDistance;
-       });
+         for (var i = 0; i < buffer1.length; i++) {
+           var _item = buffer1[i];
+           var buffer2indices = equivalenceClasses[_item] || [];
+           var r = 0;
+           var c = candidates[0];

 
 

-       var invariant = createCommonjsModule(function (module, exports) {
-       Object.defineProperty(exports, "__esModule", { value: true });
+           for (var jx = 0; jx < buffer2indices.length; jx++) {
+             var _j = buffer2indices[jx];
+             var s = void 0;

 
 

-       /**
-        * Unwrap a coordinate from a Point Feature, Geometry or a single coordinate.
-        *
-        * @name getCoord
-        * @param {Array<number>|Geometry<Point>|Feature<Point>} coord GeoJSON Point or an Array of numbers
-        * @returns {Array<number>} coordinates
-        * @example
-        * var pt = turf.point([10, 10]);
-        *
-        * var coord = turf.getCoord(pt);
-        * //= [10, 10]
-        */
-       function getCoord(coord) {
-           if (!coord) {
-               throw new Error("coord is required");
-           }
-           if (!Array.isArray(coord)) {
-               if (coord.type === "Feature" && coord.geometry !== null && coord.geometry.type === "Point") {
-                   return coord.geometry.coordinates;
-               }
-               if (coord.type === "Point") {
-                   return coord.coordinates;
-               }
-           }
-           if (Array.isArray(coord) && coord.length >= 2 && !Array.isArray(coord[0]) && !Array.isArray(coord[1])) {
-               return coord;
-           }
-           throw new Error("coord must be GeoJSON Point or an Array of numbers");
-       }
-       exports.getCoord = getCoord;
-       /**
-        * Unwrap coordinates from a Feature, Geometry Object or an Array
-        *
-        * @name getCoords
-        * @param {Array<any>|Geometry|Feature} coords Feature, Geometry Object or an Array
-        * @returns {Array<any>} coordinates
-        * @example
-        * var poly = turf.polygon([[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]);
-        *
-        * var coords = turf.getCoords(poly);
-        * //= [[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]
-        */
-       function getCoords(coords) {
-           if (Array.isArray(coords)) {
-               return coords;
-           }
-           // Feature
-           if (coords.type === "Feature") {
-               if (coords.geometry !== null) {
-                   return coords.geometry.coordinates;
-               }
-           }
-           else {
-               // Geometry
-               if (coords.coordinates) {
-                   return coords.coordinates;
-               }
-           }
-           throw new Error("coords must be GeoJSON Feature, Geometry Object or an Array");
-       }
-       exports.getCoords = getCoords;
-       /**
-        * Checks if coordinates contains a number
-        *
-        * @name containsNumber
-        * @param {Array<any>} coordinates GeoJSON Coordinates
-        * @returns {boolean} true if Array contains a number
-        */
-       function containsNumber(coordinates) {
-           if (coordinates.length > 1 && helpers$1.isNumber(coordinates[0]) && helpers$1.isNumber(coordinates[1])) {
-               return true;
-           }
-           if (Array.isArray(coordinates[0]) && coordinates[0].length) {
-               return containsNumber(coordinates[0]);
-           }
-           throw new Error("coordinates must only contain numbers");
-       }
-       exports.containsNumber = containsNumber;
-       /**
-        * Enforce expectations about types of GeoJSON objects for Turf.
-        *
-        * @name geojsonType
-        * @param {GeoJSON} value any GeoJSON object
-        * @param {string} type expected GeoJSON type
-        * @param {string} name name of calling function
-        * @throws {Error} if value is not the expected type.
-        */
-       function geojsonType(value, type, name) {
-           if (!type || !name) {
-               throw new Error("type and name required");
-           }
-           if (!value || value.type !== type) {
-               throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + value.type);
-           }
-       }
-       exports.geojsonType = geojsonType;
-       /**
-        * Enforce expectations about types of {@link Feature} inputs for Turf.
-        * Internally this uses {@link geojsonType} to judge geometry types.
-        *
-        * @name featureOf
-        * @param {Feature} feature a feature with an expected geometry type
-        * @param {string} type expected GeoJSON type
-        * @param {string} name name of calling function
-        * @throws {Error} error if value is not the expected type.
-        */
-       function featureOf(feature, type, name) {
-           if (!feature) {
-               throw new Error("No feature passed");
-           }
-           if (!name) {
-               throw new Error(".featureOf() requires a name");
-           }
-           if (!feature || feature.type !== "Feature" || !feature.geometry) {
-               throw new Error("Invalid input to " + name + ", Feature with geometry required");
-           }
-           if (!feature.geometry || feature.geometry.type !== type) {
-               throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
-           }
-       }
-       exports.featureOf = featureOf;
-       /**
-        * Enforce expectations about types of {@link FeatureCollection} inputs for Turf.
-        * Internally this uses {@link geojsonType} to judge geometry types.
-        *
-        * @name collectionOf
-        * @param {FeatureCollection} featureCollection a FeatureCollection for which features will be judged
-        * @param {string} type expected GeoJSON type
-        * @param {string} name name of calling function
-        * @throws {Error} if value is not the expected type.
-        */
-       function collectionOf(featureCollection, type, name) {
-           if (!featureCollection) {
-               throw new Error("No featureCollection passed");
-           }
-           if (!name) {
-               throw new Error(".collectionOf() requires a name");
-           }
-           if (!featureCollection || featureCollection.type !== "FeatureCollection") {
-               throw new Error("Invalid input to " + name + ", FeatureCollection required");
-           }
-           for (var _i = 0, _a = featureCollection.features; _i < _a.length; _i++) {
-               var feature = _a[_i];
-               if (!feature || feature.type !== "Feature" || !feature.geometry) {
-                   throw new Error("Invalid input to " + name + ", Feature with geometry required");
-               }
-               if (!feature.geometry || feature.geometry.type !== type) {
-                   throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
-               }
-           }
-       }
-       exports.collectionOf = collectionOf;
-       /**
-        * Get Geometry from Feature or Geometry Object
-        *
-        * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
-        * @returns {Geometry|null} GeoJSON Geometry Object
-        * @throws {Error} if geojson is not a Feature or Geometry Object
-        * @example
-        * var point = {
-        *   "type": "Feature",
-        *   "properties": {},
-        *   "geometry": {
-        *     "type": "Point",
-        *     "coordinates": [110, 40]
-        *   }
-        * }
-        * var geom = turf.getGeom(point)
-        * //={"type": "Point", "coordinates": [110, 40]}
-        */
-       function getGeom(geojson) {
-           if (geojson.type === "Feature") {
-               return geojson.geometry;
-           }
-           return geojson;
-       }
-       exports.getGeom = getGeom;
-       /**
-        * Get GeoJSON object's type, Geometry type is prioritize.
-        *
-        * @param {GeoJSON} geojson GeoJSON object
-        * @param {string} [name="geojson"] name of the variable to display in error message
-        * @returns {string} GeoJSON type
-        * @example
-        * var point = {
-        *   "type": "Feature",
-        *   "properties": {},
-        *   "geometry": {
-        *     "type": "Point",
-        *     "coordinates": [110, 40]
-        *   }
-        * }
-        * var geom = turf.getType(point)
-        * //="Point"
-        */
-       function getType(geojson, name) {
-           if (geojson.type === "FeatureCollection") {
-               return "FeatureCollection";
-           }
-           if (geojson.type === "GeometryCollection") {
-               return "GeometryCollection";
-           }
-           if (geojson.type === "Feature" && geojson.geometry !== null) {
-               return geojson.geometry.type;
-           }
-           return geojson.type;
-       }
-       exports.getType = getType;
-       });
+             for (s = r; s < candidates.length; s++) {
+               if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
+                 break;
+               }
+             }

 
 

-       var lineclip_1 = lineclip;
-       var _default = lineclip;
+             if (s < candidates.length) {
+               var newCandidate = {
+                 buffer1index: i,
+                 buffer2index: _j,
+                 chain: candidates[s]
+               };

 
 

-       lineclip.polyline = lineclip;
-       lineclip.polygon = polygonclip;
+               if (r === candidates.length) {
+                 candidates.push(c);
+               } else {
+                 candidates[r] = c;
+               }

 
 

+               r = s + 1;
+               c = newCandidate;

 
 

-       // Cohen-Sutherland line clippign algorithm, adapted to efficiently
-       // handle polylines rather than just segments
+               if (r === candidates.length) {
+                 break; // no point in examining further (j)s
+               }
+             }
+           }
+
+           candidates[r] = c;
+         } // At this point, we know the LCS: it's in the reverse of the
+         // linked-list through .chain of candidates[candidates.length - 1].

 
 

-       function lineclip(points, bbox, result) {

 
 

-           var len = points.length,
-               codeA = bitCode(points[0], bbox),
-               part = [],
-               i, a, b, codeB, lastCode;
+         return candidates[candidates.length - 1];
+       } // We apply the LCS to build a 'comm'-style picture of the
+       // offsets and lengths of mismatched chunks in the input
+       // buffers. This is used by diff3MergeRegions.

 
 

-           if (!result) { result = []; }

 
 

-           for (i = 1; i < len; i++) {
-               a = points[i - 1];
-               b = points[i];
-               codeB = lastCode = bitCode(b, bbox);
+       function diffIndices(buffer1, buffer2) {
+         var lcs = LCS(buffer1, buffer2);
+         var result = [];
+         var tail1 = buffer1.length;
+         var tail2 = buffer2.length;

 
 

-               while (true) {
+         for (var candidate = lcs; candidate !== null; candidate = candidate.chain) {
+           var mismatchLength1 = tail1 - candidate.buffer1index - 1;
+           var mismatchLength2 = tail2 - candidate.buffer2index - 1;
+           tail1 = candidate.buffer1index;
+           tail2 = candidate.buffer2index;

 
 

-                   if (!(codeA | codeB)) { // accept
-                       part.push(a);
+           if (mismatchLength1 || mismatchLength2) {
+             result.push({
+               buffer1: [tail1 + 1, mismatchLength1],
+               buffer1Content: buffer1.slice(tail1 + 1, tail1 + 1 + mismatchLength1),
+               buffer2: [tail2 + 1, mismatchLength2],
+               buffer2Content: buffer2.slice(tail2 + 1, tail2 + 1 + mismatchLength2)
+             });
+           }
+         }

 
 

-                       if (codeB !== lastCode) { // segment went outside
-                           part.push(b);
+         result.reverse();
+         return result;
+       } // We apply the LCS to build a JSON representation of a
+       // independently derived from O, returns a fairly complicated
+       // internal representation of merge decisions it's taken. The
+       // interested reader may wish to consult
+       //
+       // Sanjeev Khanna, Keshav Kunal, and Benjamin C. Pierce.
+       // 'A Formal Investigation of ' In Arvind and Prasad,
+       // editors, Foundations of Software Technology and Theoretical
+       // Computer Science (FSTTCS), December 2007.
+       //
+       // (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf)
+       //

 
 

-                           if (i < len - 1) { // start a new line
-                               result.push(part);
-                               part = [];
-                           }
-                       } else if (i === len - 1) {
-                           part.push(b);
-                       }
-                       break;

 
 

-                   } else if (codeA & codeB) { // trivial reject
-                       break;
+       function diff3MergeRegions(a, o, b) {
+         // "hunks" are array subsets where `a` or `b` are different from `o`
+         // https://www.gnu.org/software/diffutils/manual/html_node/diff3-Hunks.html
+         var hunks = [];
+
+         function addHunk(h, ab) {
+           hunks.push({
+             ab: ab,
+             oStart: h.buffer1[0],
+             oLength: h.buffer1[1],
+             // length of o to remove
+             abStart: h.buffer2[0],
+             abLength: h.buffer2[1] // length of a/b to insert
+             // abContent: (ab === 'a' ? a : b).slice(h.buffer2[0], h.buffer2[0] + h.buffer2[1])

 
 

-                   } else if (codeA) { // a outside, intersect with clip edge
-                       a = intersect(a, b, codeA, bbox);
-                       codeA = bitCode(a, bbox);
+           });
+         }

 
 

-                   } else { // b outside
-                       b = intersect(a, b, codeB, bbox);
-                       codeB = bitCode(b, bbox);
-                   }
-               }
+         diffIndices(o, a).forEach(function (item) {
+           return addHunk(item, 'a');
+         });
+         diffIndices(o, b).forEach(function (item) {
+           return addHunk(item, 'b');
+         });
+         hunks.sort(function (x, y) {
+           return x.oStart - y.oStart;
+         });
+         var results = [];
+         var currOffset = 0;

 
 

-               codeA = lastCode;
+         function advanceTo(endOffset) {
+           if (endOffset > currOffset) {
+             results.push({
+               stable: true,
+               buffer: 'o',
+               bufferStart: currOffset,
+               bufferLength: endOffset - currOffset,
+               bufferContent: o.slice(currOffset, endOffset)
+             });
+             currOffset = endOffset;

            }
            }

+         }

 
 

-           if (part.length) { result.push(part); }
+         while (hunks.length) {
+           var hunk = hunks.shift();
+           var regionStart = hunk.oStart;
+           var regionEnd = hunk.oStart + hunk.oLength;
+           var regionHunks = [hunk];
+           advanceTo(regionStart); // Try to pull next overlapping hunk into this region

 
 

-           return result;
-       }
+           while (hunks.length) {
+             var nextHunk = hunks[0];
+             var nextHunkStart = nextHunk.oStart;
+             if (nextHunkStart > regionEnd) break; // no overlap

 
 

-       // Sutherland-Hodgeman polygon clipping algorithm
+             regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
+             regionHunks.push(hunks.shift());
+           }

 
 

-       function polygonclip(points, bbox) {
+           if (regionHunks.length === 1) {
+             // Only one hunk touches this region, meaning that there is no conflict here.
+             // Either `a` or `b` is inserting into a region of `o` unchanged by the other.
+             if (hunk.abLength > 0) {
+               var buffer = hunk.ab === 'a' ? a : b;
+               results.push({
+                 stable: true,
+                 buffer: hunk.ab,
+                 bufferStart: hunk.abStart,
+                 bufferLength: hunk.abLength,
+                 bufferContent: buffer.slice(hunk.abStart, hunk.abStart + hunk.abLength)
+               });
+             }
+           } else {
+             // A true a/b conflict. Determine the bounds involved from `a`, `o`, and `b`.
+             // Effectively merge all the `a` hunks into one giant hunk, then do the
+             // same for the `b` hunks; then, correct for skew in the regions of `o`
+             // that each side changed, and report appropriate spans for the three sides.
+             var bounds = {
+               a: [a.length, -1, o.length, -1],
+               b: [b.length, -1, o.length, -1]
+             };

 
 

-           var result, edge, prev, prevInside, i, p, inside;
+             while (regionHunks.length) {
+               hunk = regionHunks.shift();
+               var oStart = hunk.oStart;
+               var oEnd = oStart + hunk.oLength;
+               var abStart = hunk.abStart;
+               var abEnd = abStart + hunk.abLength;
+               var _b = bounds[hunk.ab];
+               _b[0] = Math.min(abStart, _b[0]);
+               _b[1] = Math.max(abEnd, _b[1]);
+               _b[2] = Math.min(oStart, _b[2]);
+               _b[3] = Math.max(oEnd, _b[3]);
+             }
+
+             var aStart = bounds.a[0] + (regionStart - bounds.a[2]);
+             var aEnd = bounds.a[1] + (regionEnd - bounds.a[3]);
+             var bStart = bounds.b[0] + (regionStart - bounds.b[2]);
+             var bEnd = bounds.b[1] + (regionEnd - bounds.b[3]);
+             var result = {
+               stable: false,
+               aStart: aStart,
+               aLength: aEnd - aStart,
+               aContent: a.slice(aStart, aEnd),
+               oStart: regionStart,
+               oLength: regionEnd - regionStart,
+               oContent: o.slice(regionStart, regionEnd),
+               bStart: bStart,
+               bLength: bEnd - bStart,
+               bContent: b.slice(bStart, bEnd)
+             };
+             results.push(result);
+           }
+
+           currOffset = regionEnd;
+         }

 
 

-           // clip against each side of the clip rectangle
-           for (edge = 1; edge <= 8; edge *= 2) {
-               result = [];
-               prev = points[points.length - 1];
-               prevInside = !(bitCode(prev, bbox) & edge);
+         advanceTo(o.length);
+         return results;
+       } // Applies the output of diff3MergeRegions to actually
+       // construct the merged buffer; the returned result alternates
+       // between 'ok' and 'conflict' blocks.
+       // A "false conflict" is where `a` and `b` both change the same from `o`

 
 

-               for (i = 0; i < points.length; i++) {
-                   p = points[i];
-                   inside = !(bitCode(p, bbox) & edge);

 
 

-                   // if segment goes through the clip window, add an intersection
-                   if (inside !== prevInside) { result.push(intersect(prev, p, edge, bbox)); }
+       function diff3Merge(a, o, b, options) {
+         var defaults = {
+           excludeFalseConflicts: true,
+           stringSeparator: /\s+/
+         };
+         options = Object.assign(defaults, options);
+         var aString = typeof a === 'string';
+         var oString = typeof o === 'string';
+         var bString = typeof b === 'string';
+         if (aString) a = a.split(options.stringSeparator);
+         if (oString) o = o.split(options.stringSeparator);
+         if (bString) b = b.split(options.stringSeparator);
+         var results = [];
+         var regions = diff3MergeRegions(a, o, b);
+         var okBuffer = [];

 
 

-                   if (inside) { result.push(p); } // add a point if it's inside
+         function flushOk() {
+           if (okBuffer.length) {
+             results.push({
+               ok: okBuffer
+             });
+           }

 
 

-                   prev = p;
-                   prevInside = inside;
-               }
+           okBuffer = [];
+         }

 
 

-               points = result;
+         function isFalseConflict(a, b) {
+           if (a.length !== b.length) return false;

 
 

-               if (!points.length) { break; }
+           for (var i = 0; i < a.length; i++) {
+             if (a[i] !== b[i]) return false;

            }
 
            }
 

-           return result;
-       }
+           return true;
+         }

 
 

-       // intersect a segment against one of the 4 lines that make up the bbox
+         regions.forEach(function (region) {
+           if (region.stable) {
+             var _okBuffer;

 
 

-       function intersect(a, b, edge, bbox) {
-           return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
-                  edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
-                  edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
-                  edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
-                  null;
+             (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
+           } else {
+             if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
+               var _okBuffer2;
+
+               (_okBuffer2 = okBuffer).push.apply(_okBuffer2, _toConsumableArray(region.aContent));
+             } else {
+               flushOk();
+               results.push({
+                 conflict: {
+                   a: region.aContent,
+                   aIndex: region.aStart,
+                   o: region.oContent,
+                   oIndex: region.oStart,
+                   b: region.bContent,
+                   bIndex: region.bStart
+                 }
+               });
+             }
+           }
+         });
+         flushOk();
+         return results;

        }
 
        }
 

-       // bit code reflects the point position relative to the bbox:
+       function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
+         discardTags = discardTags || {};
+         var _option = 'safe'; // 'safe', 'force_local', 'force_remote'

 
 

-       //         left  mid  right
-       //    top  1001  1000  1010
-       //    mid  0001  0000  0010
-       // bottom  0101  0100  0110
+         var _conflicts = [];

 
 

-       function bitCode(p, bbox) {
-           var code = 0;
+         function user(d) {
+           return typeof formatUser === 'function' ? formatUser(d) : d;
+         }

 
 

-           if (p[0] < bbox[0]) { code |= 1; } // left
-           else if (p[0] > bbox[2]) { code |= 2; } // right
+         function mergeLocation(remote, target) {
+           function pointEqual(a, b) {
+             var epsilon = 1e-6;
+             return Math.abs(a[0] - b[0]) < epsilon && Math.abs(a[1] - b[1]) < epsilon;
+           }

 
 

-           if (p[1] < bbox[1]) { code |= 4; } // bottom
-           else if (p[1] > bbox[3]) { code |= 8; } // top
+           if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
+             return target;
+           }

 
 

-           return code;
-       }
-       lineclip_1.default = _default;
+           if (_option === 'force_remote') {
+             return target.update({
+               loc: remote.loc
+             });
+           }

 
 

-       var bboxClip_1 = createCommonjsModule(function (module, exports) {
-       var __importStar = (commonjsGlobal && commonjsGlobal.__importStar) || function (mod) {
-           if (mod && mod.__esModule) { return mod; }
-           var result = {};
-           if (mod != null) { for (var k in mod) { if (Object.hasOwnProperty.call(mod, k)) { result[k] = mod[k]; } } }
-           result["default"] = mod;
-           return result;
-       };
-       Object.defineProperty(exports, "__esModule", { value: true });
+           _conflicts.push(_t('merge_remote_changes.conflict.location', {
+             user: user(remote.user)
+           }));

 
 

+           return target;
+         }

 
 

-       var lineclip = __importStar(lineclip_1);
-       /**
-        * Takes a {@link Feature} and a bbox and clips the feature to the bbox using
-        * [lineclip](https://github.com/mapbox/lineclip).
-        * May result in degenerate edges when clipping Polygons.
-        *
-        * @name bboxClip
-        * @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
-        * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
-        * @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
-        * @example
-        * var bbox = [0, 0, 10, 10];
-        * var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
-        *
-        * var clipped = turf.bboxClip(poly, bbox);
-        *
-        * //addToMap
-        * var addToMap = [bbox, poly, clipped]
-        */
-       function bboxClip(feature, bbox) {
-           var geom = invariant.getGeom(feature);
-           var type = geom.type;
-           var properties = feature.type === "Feature" ? feature.properties : {};
-           var coords = geom.coordinates;
-           switch (type) {
-               case "LineString":
-               case "MultiLineString":
-                   var lines_1 = [];
-                   if (type === "LineString") {
-                       coords = [coords];
-                   }
-                   coords.forEach(function (line) {
-                       lineclip.polyline(line, bbox, lines_1);
-                   });
-                   if (lines_1.length === 1) {
-                       return helpers$1.lineString(lines_1[0], properties);
-                   }
-                   return helpers$1.multiLineString(lines_1, properties);
-               case "Polygon":
-                   return helpers$1.polygon(clipPolygon(coords, bbox), properties);
-               case "MultiPolygon":
-                   return helpers$1.multiPolygon(coords.map(function (poly) {
-                       return clipPolygon(poly, bbox);
-                   }), properties);
-               default:
-                   throw new Error("geometry " + type + " not supported");
+         function mergeNodes(base, remote, target) {
+           if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
+             return target;

            }
            }

-       }
-       exports.default = bboxClip;
-       function clipPolygon(rings, bbox) {
-           var outRings = [];
-           for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
-               var ring = rings_1[_i];
-               var clipped = lineclip.polygon(ring, bbox);
-               if (clipped.length > 0) {
-                   if (clipped[0][0] !== clipped[clipped.length - 1][0] || clipped[0][1] !== clipped[clipped.length - 1][1]) {
-                       clipped.push(clipped[0]);
-                   }
-                   if (clipped.length >= 4) {
-                       outRings.push(clipped);
-                   }
-               }
+
+           if (_option === 'force_remote') {
+             return target.update({
+               nodes: remote.nodes
+             });

            }
            }

-           return outRings;
-       }
-       });

 
 

-       var fastJsonStableStringify = function (data, opts) {
-           if (!opts) { opts = {}; }
-           if (typeof opts === 'function') { opts = { cmp: opts }; }
-           var cycles = (typeof opts.cycles === 'boolean') ? opts.cycles : false;
-
-           var cmp = opts.cmp && (function (f) {
-               return function (node) {
-                   return function (a, b) {
-                       var aobj = { key: a, value: node[a] };
-                       var bobj = { key: b, value: node[b] };
-                       return f(aobj, bobj);
-                   };
-               };
-           })(opts.cmp);
+           var ccount = _conflicts.length;
+           var o = base.nodes || [];
+           var a = target.nodes || [];
+           var b = remote.nodes || [];
+           var nodes = [];
+           var hunks = diff3Merge(a, o, b, {
+             excludeFalseConflicts: true
+           });

 
 

-           var seen = [];
-           return (function stringify (node) {
-               if (node && node.toJSON && typeof node.toJSON === 'function') {
-                   node = node.toJSON();
-               }
+           for (var i = 0; i < hunks.length; i++) {
+             var hunk = hunks[i];

 
 

-               if (node === undefined) { return; }
-               if (typeof node == 'number') { return isFinite(node) ? '' + node : 'null'; }
-               if (typeof node !== 'object') { return JSON.stringify(node); }
+             if (hunk.ok) {
+               nodes.push.apply(nodes, hunk.ok);
+             } else {
+               // for all conflicts, we can assume c.a !== c.b
+               // because `diff3Merge` called with `true` option to exclude false conflicts..
+               var c = hunk.conflict;
+
+               if (fastDeepEqual(c.o, c.a)) {
+                 // only changed remotely
+                 nodes.push.apply(nodes, c.b);
+               } else if (fastDeepEqual(c.o, c.b)) {
+                 // only changed locally
+                 nodes.push.apply(nodes, c.a);
+               } else {
+                 // changed both locally and remotely
+                 _conflicts.push(_t('merge_remote_changes.conflict.nodelist', {
+                   user: user(remote.user)
+                 }));

 
 

-               var i, out;
-               if (Array.isArray(node)) {
-                   out = '[';
-                   for (i = 0; i < node.length; i++) {
-                       if (i) { out += ','; }
-                       out += stringify(node[i]) || 'null';
-                   }
-                   return out + ']';
+                 break;

                }
                }

+             }
+           }
+
+           return _conflicts.length === ccount ? target.update({
+             nodes: nodes
+           }) : target;
+         }

 
 

-               if (node === null) { return 'null'; }
+         function mergeChildren(targetWay, children, updates, graph) {
+           function isUsed(node, targetWay) {
+             var hasInterestingParent = graph.parentWays(node).some(function (way) {
+               return way.id !== targetWay.id;
+             });
+             return node.hasInterestingTags() || hasInterestingParent || graph.parentRelations(node).length > 0;
+           }

 
 

-               if (seen.indexOf(node) !== -1) {
-                   if (cycles) { return JSON.stringify('__cycle__'); }
-                   throw new TypeError('Converting circular structure to JSON');
-               }
+           var ccount = _conflicts.length;

 
 

-               var seenIndex = seen.push(node) - 1;
-               var keys = Object.keys(node).sort(cmp && cmp(node));
-               out = '';
-               for (i = 0; i < keys.length; i++) {
-                   var key = keys[i];
-                   var value = stringify(node[key]);
+           for (var i = 0; i < children.length; i++) {
+             var id = children[i];
+             var node = graph.hasEntity(id); // remove unused childNodes..

 
 

-                   if (!value) { continue; }
-                   if (out) { out += ','; }
-                   out += JSON.stringify(key) + ':' + value;
+             if (targetWay.nodes.indexOf(id) === -1) {
+               if (node && !isUsed(node, targetWay)) {
+                 updates.removeIds.push(id);

                }
                }

-               seen.splice(seenIndex, 1);
-               return '{' + out + '}';
-           })(data);
-       };

 
 

-       function DEFAULT_COMPARE (a, b) { return a > b ? 1 : a < b ? -1 : 0; }
+               continue;
+             } // restore used childNodes..

 
 

-       var SplayTree = function SplayTree(compare, noDuplicates) {
-         if ( compare === void 0 ) compare = DEFAULT_COMPARE;
-         if ( noDuplicates === void 0 ) noDuplicates = false;

 
 

-         this._compare = compare;
-         this._root = null;
-         this._size = 0;
-         this._noDuplicates = !!noDuplicates;
-       };
+             var local = localGraph.hasEntity(id);
+             var remote = remoteGraph.hasEntity(id);
+             var target;

 
 

-       var prototypeAccessors = { size: { configurable: true } };
+             if (_option === 'force_remote' && remote && remote.visible) {
+               updates.replacements.push(remote);
+             } else if (_option === 'force_local' && local) {
+               target = osmEntity(local);

 
 

+               if (remote) {
+                 target = target.update({
+                   version: remote.version
+                 });
+               }

 
 

-       SplayTree.prototype.rotateLeft = function rotateLeft (x) {
-         var y = x.right;
-         if (y) {
-           x.right = y.left;
-           if (y.left) { y.left.parent = x; }
-           y.parent = x.parent;
-         }
+               updates.replacements.push(target);
+             } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
+               target = osmEntity(local, {
+                 version: remote.version
+               });

 
 

-         if (!x.parent)              { this._root = y; }
-         else if (x === x.parent.left) { x.parent.left = y; }
-         else                        { x.parent.right = y; }
-         if (y) { y.left = x; }
-         x.parent = y;
-       };
+               if (remote.visible) {
+                 target = mergeLocation(remote, target);
+               } else {
+                 _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
+                   user: user(remote.user)
+                 }));
+               }

 
 

+               if (_conflicts.length !== ccount) break;
+               updates.replacements.push(target);
+             }
+           }

 
 

-       SplayTree.prototype.rotateRight = function rotateRight (x) {
-         var y = x.left;
-         if (y) {
-           x.left = y.right;
-           if (y.right) { y.right.parent = x; }
-           y.parent = x.parent;
+           return targetWay;

          }
 
          }
 

-         if (!x.parent)             { this._root = y; }
-         else if(x === x.parent.left) { x.parent.left = y; }
-         else                       { x.parent.right = y; }
-         if (y) { y.right = x; }
-         x.parent = y;
-       };
-
+         function updateChildren(updates, graph) {
+           for (var i = 0; i < updates.replacements.length; i++) {
+             graph = graph.replace(updates.replacements[i]);
+           }

 
 

-       SplayTree.prototype._splay = function _splay (x) {
-         while (x.parent) {
-           var p = x.parent;
-           if (!p.parent) {
-             if (p.left === x) { this.rotateRight(p); }
-             else            { this.rotateLeft(p); }
-           } else if (p.left === x && p.parent.left === p) {
-             this.rotateRight(p.parent);
-             this.rotateRight(p);
-           } else if (p.right === x && p.parent.right === p) {
-             this.rotateLeft(p.parent);
-             this.rotateLeft(p);
-           } else if (p.left === x && p.parent.right === p) {
-             this.rotateRight(p);
-             this.rotateLeft(p);
-           } else {
-             this.rotateLeft(p);
-             this.rotateRight(p);
+           if (updates.removeIds.length) {
+             graph = actionDeleteMultiple(updates.removeIds)(graph);

            }
            }

+
+           return graph;

          }
          }

-       };

 
 

+         function mergeMembers(remote, target) {
+           if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
+             return target;
+           }

 
 

-       SplayTree.prototype.splay = function splay (x) {
-         var p, gp, ggp, l, r;
+           if (_option === 'force_remote') {
+             return target.update({
+               members: remote.members
+             });
+           }

 
 

-         while (x.parent) {
-           p = x.parent;
-           gp = p.parent;
+           _conflicts.push(_t('merge_remote_changes.conflict.memberlist', {
+             user: user(remote.user)
+           }));

 
 

-           if (gp && gp.parent) {
-             ggp = gp.parent;
-             if (ggp.left === gp) { ggp.left= x; }
-             else               { ggp.right = x; }
-             x.parent = ggp;
-           } else {
-             x.parent = null;
-             this._root = x;
-           }
+           return target;
+         }

 
 

-           l = x.left; r = x.right;
+         function mergeTags(base, remote, target) {
+           if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
+             return target;
+           }

 
 

-           if (x === p.left) { // left
-             if (gp) {
-               if (gp.left === p) {
-                 /* zig-zig */
-                 if (p.right) {
-                   gp.left = p.right;
-                   gp.left.parent = gp;
-                 } else { gp.left = null; }
+           if (_option === 'force_remote') {
+             return target.update({
+               tags: remote.tags
+             });
+           }

 
 

-                 p.right = gp;
-                 gp.parent = p;
-               } else {
-                 /* zig-zag */
-                 if (l) {
-                   gp.right = l;
-                   l.parent = gp;
-                 } else { gp.right = null; }
-
-                 x.left  = gp;
-                 gp.parent = x;
-               }
-             }
-             if (r) {
-               p.left = r;
-               r.parent = p;
-             } else { p.left = null; }
-
-             x.right= p;
-             p.parent = x;
-           } else { // right
-             if (gp) {
-               if (gp.right === p) {
-                 /* zig-zig */
-                 if (p.left) {
-                   gp.right = p.left;
-                   gp.right.parent = gp;
-                 } else { gp.right = null; }
-
-                 p.left = gp;
-                 gp.parent = p;
+           var ccount = _conflicts.length;
+           var o = base.tags || {};
+           var a = target.tags || {};
+           var b = remote.tags || {};
+           var keys = utilArrayUnion(utilArrayUnion(Object.keys(o), Object.keys(a)), Object.keys(b)).filter(function (k) {
+             return !discardTags[k];
+           });
+           var tags = Object.assign({}, a); // shallow copy
+
+           var changed = false;
+
+           for (var i = 0; i < keys.length; i++) {
+             var k = keys[i];
+
+             if (o[k] !== b[k] && a[k] !== b[k]) {
+               // changed remotely..
+               if (o[k] !== a[k]) {
+                 // changed locally..
+                 _conflicts.push(_t('merge_remote_changes.conflict.tags', {
+                   tag: k,
+                   local: a[k],
+                   remote: b[k],
+                   user: user(remote.user)
+                 }));

                } else {
                } else {

-                 /* zig-zag */
-                 if (r) {
-                   gp.left = r;
-                   r.parent = gp;
-                 } else { gp.left = null; }
+                 // unchanged locally, accept remote change..
+                 if (b.hasOwnProperty(k)) {
+                   tags[k] = b[k];
+                 } else {
+                   delete tags[k];
+                 }

 
 

-                 x.right = gp;
-                 gp.parent = x;
+                 changed = true;

                }
              }
                }
              }

-             if (l) {
-               p.right = l;
-               l.parent = p;
-             } else { p.right = null; }
-
-             x.left = p;
-             p.parent = x;

            }
            }

-         }
-       };
-
-
-       SplayTree.prototype.replace = function replace (u, v) {
-         if (!u.parent) { this._root = v; }
-         else if (u === u.parent.left) { u.parent.left = v; }
-         else { u.parent.right = v; }
-         if (v) { v.parent = u.parent; }
-       };
-

 
 

-       SplayTree.prototype.minNode = function minNode (u) {
-           if ( u === void 0 ) u = this._root;
+           return changed && _conflicts.length === ccount ? target.update({
+             tags: tags
+           }) : target;
+         } //  `graph.base()` is the common ancestor of the two graphs.
+         //  `localGraph` contains user's edits up to saving
+         //  `remoteGraph` contains remote edits to modified nodes
+         //  `graph` must be a descendent of `localGraph` and may include
+         //      some conflict resolution actions performed on it.
+         //
+         //                  --- ... --- `localGraph` -- ... -- `graph`
+         //                 /
+         //  `graph.base()` --- ... --- `remoteGraph`
+         //

 
 

-         if (u) { while (u.left) { u = u.left; } }
-         return u;
-       };

 
 

+         var action = function action(graph) {
+           var updates = {
+             replacements: [],
+             removeIds: []
+           };
+           var base = graph.base().entities[id];
+           var local = localGraph.entity(id);
+           var remote = remoteGraph.entity(id);
+           var target = osmEntity(local, {
+             version: remote.version
+           }); // delete/undelete

 
 

-       SplayTree.prototype.maxNode = function maxNode (u) {
-           if ( u === void 0 ) u = this._root;
+           if (!remote.visible) {
+             if (_option === 'force_remote') {
+               return actionDeleteMultiple([id])(graph);
+             } else if (_option === 'force_local') {
+               if (target.type === 'way') {
+                 target = mergeChildren(target, utilArrayUniq(local.nodes), updates, graph);
+                 graph = updateChildren(updates, graph);
+               }

 
 

-         if (u) { while (u.right) { u = u.right; } }
-         return u;
-       };
+               return graph.replace(target);
+             } else {
+               _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
+                 user: user(remote.user)
+               }));

 
 

+               return graph; // do nothing
+             }
+           } // merge

 
 

-       SplayTree.prototype.insert = function insert (key, data) {
-         var z = this._root;
-         var p = null;
-         var comp = this._compare;
-         var cmp;

 
 

-         if (this._noDuplicates) {
-           while (z) {
-             p = z;
-             cmp = comp(z.key, key);
-             if (cmp === 0) { return; }
-             else if (comp(z.key, key) < 0) { z = z.right; }
-             else { z = z.left; }
-           }
-         } else {
-           while (z) {
-             p = z;
-             if (comp(z.key, key) < 0) { z = z.right; }
-             else { z = z.left; }
+           if (target.type === 'node') {
+             target = mergeLocation(remote, target);
+           } else if (target.type === 'way') {
+             // pull in any child nodes that may not be present locally..
+             graph.rebase(remoteGraph.childNodes(remote), [graph], false);
+             target = mergeNodes(base, remote, target);
+             target = mergeChildren(target, utilArrayUnion(local.nodes, remote.nodes), updates, graph);
+           } else if (target.type === 'relation') {
+             target = mergeMembers(remote, target);

            }
            }

-         }

 
 

-         z = { key: key, data: data, left: null, right: null, parent: p };
+           target = mergeTags(base, remote, target);

 
 

-         if (!p)                        { this._root = z; }
-         else if (comp(p.key, z.key) < 0) { p.right = z; }
-         else                           { p.left= z; }
-
-         this.splay(z);
-         this._size++;
-         return z;
-       };
+           if (!_conflicts.length) {
+             graph = updateChildren(updates, graph).replace(target);
+           }

 
 

+           return graph;
+         };

 
 

-       SplayTree.prototype.find = function find (key) {
-         var z  = this._root;
-         var comp = this._compare;
-         while (z) {
-           var cmp = comp(z.key, key);
-           if    (cmp < 0) { z = z.right; }
-           else if (cmp > 0) { z = z.left; }
-           else            { return z; }
-         }
-         return null;
-       };
+         action.withOption = function (opt) {
+           _option = opt;
+           return action;
+         };

 
 

-       /**
-        * Whether the tree contains a node with the given key
-        * @param{Key} key
-        * @return {boolean} true/false
-        */
-       SplayTree.prototype.contains = function contains (key) {
-         var node     = this._root;
-         var comparator = this._compare;
-         while (node){
-           var cmp = comparator(key, node.key);
-           if    (cmp === 0) { return true; }
-           else if (cmp < 0) { node = node.left; }
-           else              { node = node.right; }
-         }
+         action.conflicts = function () {
+           return _conflicts;
+         };

 
 

-         return false;
-       };
+         return action;
+       }

 
 

+       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as

 
 

-       SplayTree.prototype.remove = function remove (key) {
-         var z = this.find(key);
+       function actionMove(moveIDs, tryDelta, projection, cache) {
+         var _delta = tryDelta;

 
 

-         if (!z) { return false; }
+         function setupCache(graph) {
+           function canMove(nodeID) {
+             // Allow movement of any node that is in the selectedIDs list..
+             if (moveIDs.indexOf(nodeID) !== -1) return true; // Allow movement of a vertex where 2 ways meet..

 
 

-         this.splay(z);
+             var parents = graph.parentWays(graph.entity(nodeID));
+             if (parents.length < 3) return true; // Restrict movement of a vertex where >2 ways meet, unless all parentWays are moving too..

 
 

-         if (!z.left) { this.replace(z, z.right); }
-         else if (!z.right) { this.replace(z, z.left); }
-         else {
-           var y = this.minNode(z.right);
-           if (y.parent !== z) {
-             this.replace(y, y.right);
-             y.right = z.right;
-             y.right.parent = y;
+             var parentsMoving = parents.every(function (way) {
+               return cache.moving[way.id];
+             });
+             if (!parentsMoving) delete cache.moving[nodeID];
+             return parentsMoving;

            }
            }

-           this.replace(z, y);
-           y.left = z.left;
-           y.left.parent = y;
-         }
-
-         this._size--;
-         return true;
-       };
-

 
 

-       SplayTree.prototype.removeNode = function removeNode (z) {
-         if (!z) { return false; }
-
-         this.splay(z);
+           function cacheEntities(ids) {
+             for (var i = 0; i < ids.length; i++) {
+               var id = ids[i];
+               if (cache.moving[id]) continue;
+               cache.moving[id] = true;
+               var entity = graph.hasEntity(id);
+               if (!entity) continue;

 
 

-         if (!z.left) { this.replace(z, z.right); }
-         else if (!z.right) { this.replace(z, z.left); }
-         else {
-           var y = this.minNode(z.right);
-           if (y.parent !== z) {
-             this.replace(y, y.right);
-             y.right = z.right;
-             y.right.parent = y;
+               if (entity.type === 'node') {
+                 cache.nodes.push(id);
+                 cache.startLoc[id] = entity.loc;
+               } else if (entity.type === 'way') {
+                 cache.ways.push(id);
+                 cacheEntities(entity.nodes);
+               } else {
+                 cacheEntities(entity.members.map(function (member) {
+                   return member.id;
+                 }));
+               }
+             }

            }
            }

-           this.replace(z, y);
-           y.left = z.left;
-           y.left.parent = y;
-         }
-
-         this._size--;
-         return true;
-       };
-

 
 

-       SplayTree.prototype.erase = function erase (key) {
-         var z = this.find(key);
-         if (!z) { return; }
-
-         this.splay(z);
+           function cacheIntersections(ids) {
+             function isEndpoint(way, id) {
+               return !way.isClosed() && !!way.affix(id);
+             }

 
 

-         var s = z.left;
-         var t = z.right;
+             for (var i = 0; i < ids.length; i++) {
+               var id = ids[i]; // consider only intersections with 1 moved and 1 unmoved way.

 
 

-         var sMax = null;
-         if (s) {
-           s.parent = null;
-           sMax = this.maxNode(s);
-           this.splay(sMax);
-           this._root = sMax;
-         }
-         if (t) {
-           if (s) { sMax.right = t; }
-           else { this._root = t; }
-           t.parent = sMax;
-         }
+               var childNodes = graph.childNodes(graph.entity(id));

 
 

-         this._size--;
-       };
+               for (var j = 0; j < childNodes.length; j++) {
+                 var node = childNodes[j];
+                 var parents = graph.parentWays(node);
+                 if (parents.length !== 2) continue;
+                 var moved = graph.entity(id);
+                 var unmoved = null;

 
 

-       /**
-        * Removes and returns the node with smallest key
-        * @return {?Node}
-        */
-       SplayTree.prototype.pop = function pop () {
-         var node = this._root, returnValue = null;
-         if (node) {
-           while (node.left) { node = node.left; }
-           returnValue = { key: node.key, data: node.data };
-           this.remove(node.key);
-         }
-         return returnValue;
-       };
+                 for (var k = 0; k < parents.length; k++) {
+                   var way = parents[k];

 
 

+                   if (!cache.moving[way.id]) {
+                     unmoved = way;
+                     break;
+                   }
+                 }

 
 

-       /* eslint-disable class-methods-use-this */
+                 if (!unmoved) continue; // exclude ways that are overly connected..

 
 

-       /**
-        * Successor node
-        * @param{Node} node
-        * @return {?Node}
-        */
-       SplayTree.prototype.next = function next (node) {
-         var successor = node;
-         if (successor) {
-           if (successor.right) {
-             successor = successor.right;
-             while (successor && successor.left) { successor = successor.left; }
-           } else {
-             successor = node.parent;
-             while (successor && successor.right === node) {
-               node = successor; successor = successor.parent;
+                 if (utilArrayIntersection(moved.nodes, unmoved.nodes).length > 2) continue;
+                 if (moved.isArea() || unmoved.isArea()) continue;
+                 cache.intersections.push({
+                   nodeId: node.id,
+                   movedId: moved.id,
+                   unmovedId: unmoved.id,
+                   movedIsEP: isEndpoint(moved, node.id),
+                   unmovedIsEP: isEndpoint(unmoved, node.id)
+                 });
+               }

              }
            }
              }
            }

-         }
-         return successor;
-       };

 
 

+           if (!cache) {
+             cache = {};
+           }

 
 

-       /**
-        * Predecessor node
-        * @param{Node} node
-        * @return {?Node}
-        */
-       SplayTree.prototype.prev = function prev (node) {
-         var predecessor = node;
-         if (predecessor) {
-           if (predecessor.left) {
-             predecessor = predecessor.left;
-             while (predecessor && predecessor.right) { predecessor = predecessor.right; }
-           } else {
-             predecessor = node.parent;
-             while (predecessor && predecessor.left === node) {
-               node = predecessor;
-               predecessor = predecessor.parent;
-             }
+           if (!cache.ok) {
+             cache.moving = {};
+             cache.intersections = [];
+             cache.replacedVertex = {};
+             cache.startLoc = {};
+             cache.nodes = [];
+             cache.ways = [];
+             cacheEntities(moveIDs);
+             cacheIntersections(cache.ways);
+             cache.nodes = cache.nodes.filter(canMove);
+             cache.ok = true;

            }
            }

-         }
-         return predecessor;
-       };
-       /* eslint-enable class-methods-use-this */
+         } // Place a vertex where the moved vertex used to be, to preserve way shape..
+         //
+         //  Start:
+         //      b ---- e
+         //     / \
+         //    /   \
+         //   /     \
+         //  a       c
+         //
+         //      *               node '*' added to preserve shape
+         //     / \
+         //    /   b ---- e      way `b,e` moved here:
+         //   /     \
+         //  a       c
+         //
+         //

 
 
 
 

-       /**
-        * @param{forEachCallback} callback
-        * @return {SplayTree}
-        */
-       SplayTree.prototype.forEach = function forEach (callback) {
-         var current = this._root;
-         var s = [], done = false, i = 0;
+         function replaceMovedVertex(nodeId, wayId, graph, delta) {
+           var way = graph.entity(wayId);
+           var moved = graph.entity(nodeId);
+           var movedIndex = way.nodes.indexOf(nodeId);
+           var len, prevIndex, nextIndex;

 
 

-         while (!done) {
-           // Reach the left most Node of the current Node
-           if (current) {
-             // Place pointer to a tree node on the stack
-             // before traversing the node's left subtree
-             s.push(current);
-             current = current.left;
+           if (way.isClosed()) {
+             len = way.nodes.length - 1;
+             prevIndex = (movedIndex + len - 1) % len;
+             nextIndex = (movedIndex + len + 1) % len;

            } else {
            } else {

-             // BackTrack from the empty subtree and visit the Node
-             // at the top of the stack; however, if the stack is
-             // empty you are done
-             if (s.length > 0) {
-               current = s.pop();
-               callback(current, i++);
-
-               // We have visited the node and its left
-               // subtree. Now, it's right subtree's turn
-               current = current.right;
-             } else { done = true; }
+             len = way.nodes.length;
+             prevIndex = movedIndex - 1;
+             nextIndex = movedIndex + 1;

            }
            }

-         }
-         return this;
-       };

 
 

+           var prev = graph.hasEntity(way.nodes[prevIndex]);
+           var next = graph.hasEntity(way.nodes[nextIndex]); // Don't add orig vertex at endpoint..

 
 

-       /**
-        * Walk key range from `low` to `high`. Stops if `fn` returns a value.
-        * @param{Key}    low
-        * @param{Key}    high
-        * @param{Function} fn
-        * @param{*?}     ctx
-        * @return {SplayTree}
-        */
-       SplayTree.prototype.range = function range (low, high, fn, ctx) {
-         var Q = [];
-         var compare = this._compare;
-         var node = this._root, cmp;
+           if (!prev || !next) return graph;
+           var key = wayId + '_' + nodeId;
+           var orig = cache.replacedVertex[key];

 
 

-         while (Q.length !== 0 || node) {
-           if (node) {
-             Q.push(node);
-             node = node.left;
-           } else {
-             node = Q.pop();
-             cmp = compare(node.key, high);
-             if (cmp > 0) {
-               break;
-             } else if (compare(node.key, low) >= 0) {
-               if (fn.call(ctx, node)) { return this; } // stop if smth is returned
-             }
-             node = node.right;
+           if (!orig) {
+             orig = osmNode();
+             cache.replacedVertex[key] = orig;
+             cache.startLoc[orig.id] = cache.startLoc[nodeId];

            }
            }

-         }
-         return this;
-       };

 
 

-       /**
-        * Returns all keys in order
-        * @return {Array<Key>}
-        */
-       SplayTree.prototype.keys = function keys () {
-         var current = this._root;
-         var s = [], r = [], done = false;
+           var start, end;

 
 

-         while (!done) {
-           if (current) {
-             s.push(current);
-             current = current.left;
+           if (delta) {
+             start = projection(cache.startLoc[nodeId]);
+             end = projection.invert(geoVecAdd(start, delta));

            } else {
            } else {

-             if (s.length > 0) {
-               current = s.pop();
-               r.push(current.key);
-               current = current.right;
-             } else { done = true; }
+             end = cache.startLoc[nodeId];

            }
            }

-         }
-         return r;
-       };

 
 

+           orig = orig.move(end);
+           var angle = Math.abs(geoAngle(orig, prev, projection) - geoAngle(orig, next, projection)) * 180 / Math.PI; // Don't add orig vertex if it would just make a straight line..

 
 

-       /**
-        * Returns `data` fields of all nodes in order.
-        * @return {Array<Value>}
-        */
-       SplayTree.prototype.values = function values () {
-         var current = this._root;
-         var s = [], r = [], done = false;
+           if (angle > 175 && angle < 185) return graph; // moving forward or backward along way?

 
 

-         while (!done) {
-           if (current) {
-             s.push(current);
-             current = current.left;
-           } else {
-             if (s.length > 0) {
-               current = s.pop();
-               r.push(current.data);
-               current = current.right;
-             } else { done = true; }
-           }
-         }
-         return r;
-       };
+           var p1 = [prev.loc, orig.loc, moved.loc, next.loc].map(projection);
+           var p2 = [prev.loc, moved.loc, orig.loc, next.loc].map(projection);
+           var d1 = geoPathLength(p1);
+           var d2 = geoPathLength(p2);
+           var insertAt = d1 <= d2 ? movedIndex : nextIndex; // moving around closed loop?

 
 

+           if (way.isClosed() && insertAt === 0) insertAt = len;
+           way = way.addNode(orig.id, insertAt);
+           return graph.replace(orig).replace(way);
+         } // Remove duplicate vertex that might have been added by
+         // replaceMovedVertex.  This is done after the unzorro checks.

 
 

-       /**
-        * Returns node at given index
-        * @param{number} index
-        * @return {?Node}
-        */
-       SplayTree.prototype.at = function at (index) {
-         // removed after a consideration, more misleading than useful
-         // index = index % this.size;
-         // if (index < 0) index = this.size - index;

 
 

-         var current = this._root;
-         var s = [], done = false, i = 0;
+         function removeDuplicateVertices(wayId, graph) {
+           var way = graph.entity(wayId);
+           var epsilon = 1e-6;
+           var prev, curr;

 
 

-         while (!done) {
-           if (current) {
-             s.push(current);
-             current = current.left;
-           } else {
-             if (s.length > 0) {
-               current = s.pop();
-               if (i === index) { return current; }
-               i++;
-               current = current.right;
-             } else { done = true; }
+           function isInteresting(node, graph) {
+             return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();

            }
            }

-         }
-         return null;
-       };

 
 

-       /**
-        * Bulk-load items. Both array have to be same size
-        * @param{Array<Key>}  keys
-        * @param{Array<Value>}[values]
-        * @param{Boolean}     [presort=false] Pre-sort keys and values, using
-        *                                       tree's comparator. Sorting is done
-        *                                       in-place
-        * @return {AVLTree}
-        */
-       SplayTree.prototype.load = function load (keys, values, presort) {
-           if ( keys === void 0 ) keys = [];
-           if ( values === void 0 ) values = [];
-           if ( presort === void 0 ) presort = false;
-
-         if (this._size !== 0) { throw new Error('bulk-load: tree is not empty'); }
-         var size = keys.length;
-         if (presort) { sort(keys, values, 0, size - 1, this._compare); }
-         this._root = loadRecursive(null, keys, values, 0, size);
-         this._size = size;
-         return this;
-       };
+           for (var i = 0; i < way.nodes.length; i++) {
+             curr = graph.entity(way.nodes[i]);

 
 

+             if (prev && curr && geoVecEqual(prev.loc, curr.loc, epsilon)) {
+               if (!isInteresting(prev, graph)) {
+                 way = way.removeNode(prev.id);
+                 graph = graph.replace(way).remove(prev);
+               } else if (!isInteresting(curr, graph)) {
+                 way = way.removeNode(curr.id);
+                 graph = graph.replace(way).remove(curr);
+               }
+             }

 
 

-       SplayTree.prototype.min = function min () {
-         var node = this.minNode(this._root);
-         if (node) { return node.key; }
-         else    { return null; }
-       };
+             prev = curr;
+           }

 
 

+           return graph;
+         } // Reorder nodes around intersections that have moved..
+         //
+         //  Start:                way1.nodes: b,e         (moving)
+         //  a - b - c ----- d     way2.nodes: a,b,c,d     (static)
+         //      |                 vertex: b
+         //      e                 isEP1: true,  isEP2, false
+         //
+         //  way1 `b,e` moved here:
+         //  a ----- c = b - d
+         //              |
+         //              e
+         //
+         //  reorder nodes         way1.nodes: b,e
+         //  a ----- c - b - d     way2.nodes: a,c,b,d
+         //              |
+         //              e
+         //

 
 

-       SplayTree.prototype.max = function max () {
-         var node = this.maxNode(this._root);
-         if (node) { return node.key; }
-         else    { return null; }
-       };

 
 

-       SplayTree.prototype.isEmpty = function isEmpty () { return this._root === null; };
-       prototypeAccessors.size.get = function () { return this._size; };
+         function unZorroIntersection(intersection, graph) {
+           var vertex = graph.entity(intersection.nodeId);
+           var way1 = graph.entity(intersection.movedId);
+           var way2 = graph.entity(intersection.unmovedId);
+           var isEP1 = intersection.movedIsEP;
+           var isEP2 = intersection.unmovedIsEP; // don't move the vertex if it is the endpoint of both ways.

 
 

+           if (isEP1 && isEP2) return graph;
+           var nodes1 = graph.childNodes(way1).filter(function (n) {
+             return n !== vertex;
+           });
+           var nodes2 = graph.childNodes(way2).filter(function (n) {
+             return n !== vertex;
+           });
+           if (way1.isClosed() && way1.first() === vertex.id) nodes1.push(nodes1[0]);
+           if (way2.isClosed() && way2.first() === vertex.id) nodes2.push(nodes2[0]);
+           var edge1 = !isEP1 && geoChooseEdge(nodes1, projection(vertex.loc), projection);
+           var edge2 = !isEP2 && geoChooseEdge(nodes2, projection(vertex.loc), projection);
+           var loc; // snap vertex to nearest edge (or some point between them)..
+
+           if (!isEP1 && !isEP2) {
+             var epsilon = 1e-6,
+                 maxIter = 10;
+
+             for (var i = 0; i < maxIter; i++) {
+               loc = geoVecInterp(edge1.loc, edge2.loc, 0.5);
+               edge1 = geoChooseEdge(nodes1, projection(loc), projection);
+               edge2 = geoChooseEdge(nodes2, projection(loc), projection);
+               if (Math.abs(edge1.distance - edge2.distance) < epsilon) break;
+             }
+           } else if (!isEP1) {
+             loc = edge1.loc;
+           } else {
+             loc = edge2.loc;
+           }

 
 

-       /**
-        * Create a tree and load it with items
-        * @param{Array<Key>}        keys
-        * @param{Array<Value>?}      [values]
-
-        * @param{Function?}          [comparator]
-        * @param{Boolean?}           [presort=false] Pre-sort keys and values, using
-        *                                             tree's comparator. Sorting is done
-        *                                             in-place
-        * @param{Boolean?}           [noDuplicates=false] Allow duplicates
-        * @return {SplayTree}
-        */
-       SplayTree.createTree = function createTree (keys, values, comparator, presort, noDuplicates) {
-         return new SplayTree(comparator, noDuplicates).load(keys, values, presort);
-       };
+           graph = graph.replace(vertex.move(loc)); // if zorro happened, reorder nodes..

 
 

-       Object.defineProperties( SplayTree.prototype, prototypeAccessors );
+           if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
+             way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
+             graph = graph.replace(way1);
+           }

 
 

+           if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
+             way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
+             graph = graph.replace(way2);
+           }

 
 

-       function loadRecursive (parent, keys, values, start, end) {
-         var size = end - start;
-         if (size > 0) {
-           var middle = start + Math.floor(size / 2);
-           var key    = keys[middle];
-           var data   = values[middle];
-           var node   = { key: key, data: data, parent: parent };
-           node.left    = loadRecursive(node, keys, values, start, middle);
-           node.right   = loadRecursive(node, keys, values, middle + 1, end);
-           return node;
+           return graph;

          }
          }

-         return null;
-       }

 
 

+         function cleanupIntersections(graph) {
+           for (var i = 0; i < cache.intersections.length; i++) {
+             var obj = cache.intersections[i];
+             graph = replaceMovedVertex(obj.nodeId, obj.movedId, graph, _delta);
+             graph = replaceMovedVertex(obj.nodeId, obj.unmovedId, graph, null);
+             graph = unZorroIntersection(obj, graph);
+             graph = removeDuplicateVertices(obj.movedId, graph);
+             graph = removeDuplicateVertices(obj.unmovedId, graph);
+           }

 
 

-       function sort(keys, values, left, right, compare) {
-         if (left >= right) { return; }
-
-         var pivot = keys[(left + right) >> 1];
-         var i = left - 1;
-         var j = right + 1;
+           return graph;
+         } // check if moving way endpoint can cross an unmoved way, if so limit delta..

 
 

-         while (true) {
-           do { i++; } while (compare(keys[i], pivot) < 0);
-           do { j--; } while (compare(keys[j], pivot) > 0);
-           if (i >= j) { break; }

 
 

-           var tmp = keys[i];
-           keys[i] = keys[j];
-           keys[j] = tmp;
+         function limitDelta(graph) {
+           function moveNode(loc) {
+             return geoVecAdd(projection(loc), _delta);
+           }

 
 

-           tmp = values[i];
-           values[i] = values[j];
-           values[j] = tmp;
-         }
+           for (var i = 0; i < cache.intersections.length; i++) {
+             var obj = cache.intersections[i]; // Don't limit movement if this is vertex joins 2 endpoints..

 
 

-         sort(keys, values,  left,     j, compare);
-         sort(keys, values, j + 1, right, compare);
-       }
+             if (obj.movedIsEP && obj.unmovedIsEP) continue; // Don't limit movement if this vertex is not an endpoint anyway..

 
 

-       var NORMAL               = 0;
-       var NON_CONTRIBUTING     = 1;
-       var SAME_TRANSITION      = 2;
-       var DIFFERENT_TRANSITION = 3;
+             if (!obj.movedIsEP) continue;
+             var node = graph.entity(obj.nodeId);
+             var start = projection(node.loc);
+             var end = geoVecAdd(start, _delta);
+             var movedNodes = graph.childNodes(graph.entity(obj.movedId));
+             var movedPath = movedNodes.map(function (n) {
+               return moveNode(n.loc);
+             });
+             var unmovedNodes = graph.childNodes(graph.entity(obj.unmovedId));
+             var unmovedPath = unmovedNodes.map(function (n) {
+               return projection(n.loc);
+             });
+             var hits = geoPathIntersections(movedPath, unmovedPath);

 
 

-       var INTERSECTION = 0;
-       var UNION        = 1;
-       var DIFFERENCE   = 2;
-       var XOR          = 3;
+             for (var j = 0; i < hits.length; i++) {
+               if (geoVecEqual(hits[j], end)) continue;
+               var edge = geoChooseEdge(unmovedNodes, end, projection);
+               _delta = geoVecSubtract(projection(edge.loc), start);
+             }
+           }
+         }

 
 

-       /**
-        * @param  {SweepEvent} event
-        * @param  {SweepEvent} prev
-        * @param  {Operation} operation
-        */
-       function computeFields (event, prev, operation) {
-         // compute inOut and otherInOut fields
-         if (prev === null) {
-           event.inOut      = false;
-           event.otherInOut = true;
+         var action = function action(graph) {
+           if (_delta[0] === 0 && _delta[1] === 0) return graph;
+           setupCache(graph);

 
 

-         // previous line segment in sweepline belongs to the same polygon
-         } else {
-           if (event.isSubject === prev.isSubject) {
-             event.inOut      = !prev.inOut;
-             event.otherInOut = prev.otherInOut;
+           if (cache.intersections.length) {
+             limitDelta(graph);
+           }

 
 

-           // previous line segment in sweepline belongs to the clipping polygon
-           } else {
-             event.inOut      = !prev.otherInOut;
-             event.otherInOut = prev.isVertical() ? !prev.inOut : prev.inOut;
+           for (var i = 0; i < cache.nodes.length; i++) {
+             var node = graph.entity(cache.nodes[i]);
+             var start = projection(node.loc);
+             var end = geoVecAdd(start, _delta);
+             graph = graph.replace(node.move(projection.invert(end)));

            }
 
            }
 

-           // compute prevInResult field
-           if (prev) {
-             event.prevInResult = (!inResult(prev, operation) || prev.isVertical())
-               ? prev.prevInResult : prev;
+           if (cache.intersections.length) {
+             graph = cleanupIntersections(graph);

            }
            }

-         }

 
 

-         // check if the line segment belongs to the Boolean operation
-         var isInResult = inResult(event, operation);
-         if (isInResult) {
-           event.resultTransition = determineResultTransition(event, operation);
-         } else {
-           event.resultTransition = 0;
-         }
-       }
-
-
-       /* eslint-disable indent */
-       function inResult(event, operation) {
-         switch (event.type) {
-           case NORMAL:
-             switch (operation) {
-               case INTERSECTION:
-                 return !event.otherInOut;
-               case UNION:
-                 return event.otherInOut;
-               case DIFFERENCE:
-                 // return (event.isSubject && !event.otherInOut) ||
-                 //         (!event.isSubject && event.otherInOut);
-                 return (event.isSubject && event.otherInOut) ||
-                         (!event.isSubject && !event.otherInOut);
-               case XOR:
-                 return true;
-             }
-             break;
-           case SAME_TRANSITION:
-             return operation === INTERSECTION || operation === UNION;
-           case DIFFERENT_TRANSITION:
-             return operation === DIFFERENCE;
-           case NON_CONTRIBUTING:
-             return false;
-         }
-         return false;
-       }
-       /* eslint-enable indent */
+           return graph;
+         };

 
 

+         action.delta = function () {
+           return _delta;
+         };

 
 

-       function determineResultTransition(event, operation) {
-         var thisIn = !event.inOut;
-         var thatIn = !event.otherInOut;
+         return action;
+       }

 
 

-         var isIn;
-         switch (operation) {
-           case INTERSECTION:
-             isIn = thisIn && thatIn; break;
-           case UNION:
-             isIn = thisIn || thatIn; break;
-           case XOR:
-             isIn = thisIn ^ thatIn; break;
-           case DIFFERENCE:
-             if (event.isSubject) {
-               isIn = thisIn && !thatIn;
-             } else {
-               isIn = thatIn && !thisIn;
-             }
-             break;
-         }
-         return isIn ? +1 : -1;
+       function actionMoveMember(relationId, fromIndex, toIndex) {
+         return function (graph) {
+           return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
+         };

        }
 
        }
 

-       var SweepEvent = function SweepEvent (point, left, otherEvent, isSubject, edgeType) {
+       function actionMoveNode(nodeID, toLoc) {
+         var action = function action(graph, t) {
+           if (t === null || !isFinite(t)) t = 1;
+           t = Math.min(Math.max(+t, 0), 1);
+           var node = graph.entity(nodeID);
+           return graph.replace(node.move(geoVecInterp(node.loc, toLoc, t)));
+         };

 
 

-         /**
-          * Is left endpoint?
-          * @type {Boolean}
-          */
-         this.left = left;
+         action.transitionable = true;
+         return action;
+       }

 
 

-         /**
-          * @type {Array.<Number>}
-          */
-         this.point = point;
+       function actionNoop() {
+         return function (graph) {
+           return graph;
+         };
+       }

 
 

-         /**
-          * Other edge reference
-          * @type {SweepEvent}
-          */
-         this.otherEvent = otherEvent;
+       function actionOrthogonalize(wayID, projection, vertexID, degThresh, ep) {
+         var epsilon = ep || 1e-4;
+         var threshold = degThresh || 13; // degrees within right or straight to alter
+         // We test normalized dot products so we can compare as cos(angle)

 
 

-         /**
-          * Belongs to source or clipping polygon
-          * @type {Boolean}
-          */
-         this.isSubject = isSubject;
+         var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+         var upperThreshold = Math.cos(threshold * Math.PI / 180);

 
 

-         /**
-          * Edge contribution type
-          * @type {Number}
-          */
-         this.type = edgeType || NORMAL;
+         var action = function action(graph, t) {
+           if (t === null || !isFinite(t)) t = 1;
+           t = Math.min(Math.max(+t, 0), 1);
+           var way = graph.entity(wayID);
+           way = way.removeNode(''); // sanity check - remove any consecutive duplicates

 
 

+           if (way.tags.nonsquare) {
+             var tags = Object.assign({}, way.tags); // since we're squaring, remove indication that this is physically unsquare

 
 

-         /**
-          * In-out transition for the sweepline crossing polygon
-          * @type {Boolean}
-          */
-         this.inOut = false;
+             delete tags.nonsquare;
+             way = way.update({
+               tags: tags
+             });
+           }

 
 

+           graph = graph.replace(way);
+           var isClosed = way.isClosed();
+           var nodes = graph.childNodes(way).slice(); // shallow copy

 
 

-         /**
-          * @type {Boolean}
-          */
-         this.otherInOut = false;
+           if (isClosed) nodes.pop();

 
 

-         /**
-          * Previous event in result?
-          * @type {SweepEvent}
-          */
-         this.prevInResult = null;
+           if (vertexID !== undefined) {
+             nodes = nodeSubset(nodes, vertexID, isClosed);
+             if (nodes.length !== 3) return graph;
+           } // note: all geometry functions here use the unclosed node/point/coord list

 
 

-         /**
-          * Type of result transition (0 = not in result, +1 = out-in, -1, in-out)
-          * @type {Number}
-          */
-         this.resultTransition = 0;

 
 

-         // connection step
+           var nodeCount = {};
+           var points = [];
+           var corner = {
+             i: 0,
+             dotp: 1
+           };
+           var node, point, loc, score, motions, i, j;
+
+           for (i = 0; i < nodes.length; i++) {
+             node = nodes[i];
+             nodeCount[node.id] = (nodeCount[node.id] || 0) + 1;
+             points.push({
+               id: node.id,
+               coord: projection(node.loc)
+             });
+           }

 
 

-         /**
-          * @type {Number}
-          */
-         this.otherPos = -1;
+           if (points.length === 3) {
+             // move only one vertex for right triangle
+             for (i = 0; i < 1000; i++) {
+               motions = points.map(calcMotion);
+               points[corner.i].coord = geoVecAdd(points[corner.i].coord, motions[corner.i]);
+               score = corner.dotp;

 
 

-         /**
-          * @type {Number}
-          */
-         this.outputContourId = -1;
+               if (score < epsilon) {
+                 break;
+               }
+             }

 
 

-         this.isExteriorRing = true; // TODO: Looks unused, remove?
-       };
+             node = graph.entity(nodes[corner.i].id);
+             loc = projection.invert(points[corner.i].coord);
+             graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+           } else {
+             var straights = [];
+             var simplified = []; // Remove points from nearly straight sections..
+             // This produces a simplified shape to orthogonalize

 
 

-       var prototypeAccessors$1 = { inResult: { configurable: true } };
+             for (i = 0; i < points.length; i++) {
+               point = points[i];
+               var dotp = 0;

 
 

+               if (isClosed || i > 0 && i < points.length - 1) {
+                 var a = points[(i - 1 + points.length) % points.length];
+                 var b = points[(i + 1) % points.length];
+                 dotp = Math.abs(geoOrthoNormalizedDotProduct(a.coord, b.coord, point.coord));
+               }

 
 

-       /**
-        * @param{Array.<Number>}p
-        * @return {Boolean}
-        */
-       SweepEvent.prototype.isBelow = function isBelow (p) {
-         var p0 = this.point, p1 = this.otherEvent.point;
-         return this.left
-           ? (p0[0] - p[0]) * (p1[1] - p[1]) - (p1[0] - p[0]) * (p0[1] - p[1]) > 0
-           // signedArea(this.point, this.otherEvent.point, p) > 0 :
-           : (p1[0] - p[0]) * (p0[1] - p[1]) - (p0[0] - p[0]) * (p1[1] - p[1]) > 0;
-           //signedArea(this.otherEvent.point, this.point, p) > 0;
-       };
+               if (dotp > upperThreshold) {
+                 straights.push(point);
+               } else {
+                 simplified.push(point);
+               }
+             } // Orthogonalize the simplified shape

 
 
 
 

-       /**
-        * @param{Array.<Number>}p
-        * @return {Boolean}
-        */
-       SweepEvent.prototype.isAbove = function isAbove (p) {
-         return !this.isBelow(p);
-       };
+             var bestPoints = clonePoints(simplified);
+             var originalPoints = clonePoints(simplified);
+             score = Infinity;

 
 

+             for (i = 0; i < 1000; i++) {
+               motions = simplified.map(calcMotion);

 
 

-       /**
-        * @return {Boolean}
-        */
-       SweepEvent.prototype.isVertical = function isVertical () {
-         return this.point[0] === this.otherEvent.point[0];
-       };
+               for (j = 0; j < motions.length; j++) {
+                 simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
+               }

 
 

+               var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);

 
 

-       /**
-        * Does event belong to result?
-        * @return {Boolean}
-        */
-       prototypeAccessors$1.inResult.get = function () {
-         return this.resultTransition !== 0;
-       };
+               if (newScore < score) {
+                 bestPoints = clonePoints(simplified);
+                 score = newScore;
+               }

 
 

+               if (score < epsilon) {
+                 break;
+               }
+             }

 
 

-       SweepEvent.prototype.clone = function clone () {
-         var copy = new SweepEvent(
-           this.point, this.left, this.otherEvent, this.isSubject, this.type);
+             var bestCoords = bestPoints.map(function (p) {
+               return p.coord;
+             });
+             if (isClosed) bestCoords.push(bestCoords[0]); // move the nodes that should move

 
 

-         copy.contourId      = this.contourId;
-         copy.resultTransition = this.resultTransition;
-         copy.prevInResult   = this.prevInResult;
-         copy.isExteriorRing = this.isExteriorRing;
-         copy.inOut          = this.inOut;
-         copy.otherInOut     = this.otherInOut;
+             for (i = 0; i < bestPoints.length; i++) {
+               point = bestPoints[i];

 
 

-         return copy;
-       };
+               if (!geoVecEqual(originalPoints[i].coord, point.coord)) {
+                 node = graph.entity(point.id);
+                 loc = projection.invert(point.coord);
+                 graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+               }
+             } // move the nodes along straight segments

 
 

-       Object.defineProperties( SweepEvent.prototype, prototypeAccessors$1 );

 
 

-       function equals(p1, p2) {
-         if (p1[0] === p2[0]) {
-           if (p1[1] === p2[1]) {
-             return true;
-           } else {
-             return false;
-           }
-         }
-         return false;
-       }
+             for (i = 0; i < straights.length; i++) {
+               point = straights[i];
+               if (nodeCount[point.id] > 1) continue; // skip self-intersections

 
 

-       // const EPSILON = 1e-9;
-       // const abs = Math.abs;
-       // TODO https://github.com/w8r/martinez/issues/6#issuecomment-262847164
-       // Precision problem.
-       //
-       // module.exports = function equals(p1, p2) {
-       //   return abs(p1[0] - p2[0]) <= EPSILON && abs(p1[1] - p2[1]) <= EPSILON;
-       // };
+               node = graph.entity(point.id);

 
 

-       var epsilon$1 = 1.1102230246251565e-16;
-       var splitter = 134217729;
-       var resulterrbound = (3 + 8 * epsilon$1) * epsilon$1;
-
-       // fast_expansion_sum_zeroelim routine from oritinal code
-       function sum$1(elen, e, flen, f, h) {
-           var Q, Qnew, hh, bvirt;
-           var enow = e[0];
-           var fnow = f[0];
-           var eindex = 0;
-           var findex = 0;
-           if ((fnow > enow) === (fnow > -enow)) {
-               Q = enow;
-               enow = e[++eindex];
-           } else {
-               Q = fnow;
-               fnow = f[++findex];
-           }
-           var hindex = 0;
-           if (eindex < elen && findex < flen) {
-               if ((fnow > enow) === (fnow > -enow)) {
-                   Qnew = enow + Q;
-                   hh = Q - (Qnew - enow);
-                   enow = e[++eindex];
+               if (t === 1 && graph.parentWays(node).length === 1 && graph.parentRelations(node).length === 0 && !node.hasInterestingTags()) {
+                 // remove uninteresting points..
+                 graph = actionDeleteNode(node.id)(graph);

                } else {
                } else {

-                   Qnew = fnow + Q;
-                   hh = Q - (Qnew - fnow);
-                   fnow = f[++findex];
-               }
-               Q = Qnew;
-               if (hh !== 0) {
-                   h[hindex++] = hh;
-               }
-               while (eindex < elen && findex < flen) {
-                   if ((fnow > enow) === (fnow > -enow)) {
-                       Qnew = Q + enow;
-                       bvirt = Qnew - Q;
-                       hh = Q - (Qnew - bvirt) + (enow - bvirt);
-                       enow = e[++eindex];
-                   } else {
-                       Qnew = Q + fnow;
-                       bvirt = Qnew - Q;
-                       hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-                       fnow = f[++findex];
-                   }
-                   Q = Qnew;
-                   if (hh !== 0) {
-                       h[hindex++] = hh;
-                   }
+                 // move interesting points to the nearest edge..
+                 var choice = geoVecProject(point.coord, bestCoords);
+
+                 if (choice) {
+                   loc = projection.invert(choice.target);
+                   graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+                 }

                }
                }

+             }

            }
            }

-           while (eindex < elen) {
-               Qnew = Q + enow;
-               bvirt = Qnew - Q;
-               hh = Q - (Qnew - bvirt) + (enow - bvirt);
-               enow = e[++eindex];
-               Q = Qnew;
-               if (hh !== 0) {
-                   h[hindex++] = hh;
-               }
-           }
-           while (findex < flen) {
-               Qnew = Q + fnow;
-               bvirt = Qnew - Q;
-               hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-               fnow = f[++findex];
-               Q = Qnew;
-               if (hh !== 0) {
-                   h[hindex++] = hh;
-               }
-           }
-           if (Q !== 0 || hindex === 0) {
-               h[hindex++] = Q;
-           }
-           return hindex;
-       }
-
-       function estimate(elen, e) {
-           var Q = e[0];
-           for (var i = 1; i < elen; i++) { Q += e[i]; }
-           return Q;
-       }
-
-       function vec(n) {
-           return new Float64Array(n);
-       }
-
-       var ccwerrboundA = (3 + 16 * epsilon$1) * epsilon$1;
-       var ccwerrboundB = (2 + 12 * epsilon$1) * epsilon$1;
-       var ccwerrboundC = (9 + 64 * epsilon$1) * epsilon$1 * epsilon$1;
-
-       var B = vec(4);
-       var C1 = vec(8);
-       var C2 = vec(12);
-       var D = vec(16);
-       var u = vec(4);
-
-       function orient2dadapt(ax, ay, bx, by, cx, cy, detsum) {
-           var acxtail, acytail, bcxtail, bcytail;
-           var bvirt, c, ahi, alo, bhi, blo, _i, _j, _0, s1, s0, t1, t0, u3;
-
-           var acx = ax - cx;
-           var bcx = bx - cx;
-           var acy = ay - cy;
-           var bcy = by - cy;
-
-           s1 = acx * bcy;
-           c = splitter * acx;
-           ahi = c - (c - acx);
-           alo = acx - ahi;
-           c = splitter * bcy;
-           bhi = c - (c - bcy);
-           blo = bcy - bhi;
-           s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-           t1 = acy * bcx;
-           c = splitter * acy;
-           ahi = c - (c - acy);
-           alo = acy - ahi;
-           c = splitter * bcx;
-           bhi = c - (c - bcx);
-           blo = bcx - bhi;
-           t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-           _i = s0 - t0;
-           bvirt = s0 - _i;
-           B[0] = s0 - (_i + bvirt) + (bvirt - t0);
-           _j = s1 + _i;
-           bvirt = _j - s1;
-           _0 = s1 - (_j - bvirt) + (_i - bvirt);
-           _i = _0 - t1;
-           bvirt = _0 - _i;
-           B[1] = _0 - (_i + bvirt) + (bvirt - t1);
-           u3 = _j + _i;
-           bvirt = u3 - _j;
-           B[2] = _j - (u3 - bvirt) + (_i - bvirt);
-           B[3] = u3;
-
-           var det = estimate(4, B);
-           var errbound = ccwerrboundB * detsum;
-           if (det >= errbound || -det >= errbound) {
-               return det;
-           }
-
-           bvirt = ax - acx;
-           acxtail = ax - (acx + bvirt) + (bvirt - cx);
-           bvirt = bx - bcx;
-           bcxtail = bx - (bcx + bvirt) + (bvirt - cx);
-           bvirt = ay - acy;
-           acytail = ay - (acy + bvirt) + (bvirt - cy);
-           bvirt = by - bcy;
-           bcytail = by - (bcy + bvirt) + (bvirt - cy);
-
-           if (acxtail === 0 && acytail === 0 && bcxtail === 0 && bcytail === 0) {
-               return det;
-           }
-
-           errbound = ccwerrboundC * detsum + resulterrbound * Math.abs(det);
-           det += (acx * bcytail + bcy * acxtail) - (acy * bcxtail + bcx * acytail);
-           if (det >= errbound || -det >= errbound) { return det; }
-
-           s1 = acxtail * bcy;
-           c = splitter * acxtail;
-           ahi = c - (c - acxtail);
-           alo = acxtail - ahi;
-           c = splitter * bcy;
-           bhi = c - (c - bcy);
-           blo = bcy - bhi;
-           s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-           t1 = acytail * bcx;
-           c = splitter * acytail;
-           ahi = c - (c - acytail);
-           alo = acytail - ahi;
-           c = splitter * bcx;
-           bhi = c - (c - bcx);
-           blo = bcx - bhi;
-           t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-           _i = s0 - t0;
-           bvirt = s0 - _i;
-           u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-           _j = s1 + _i;
-           bvirt = _j - s1;
-           _0 = s1 - (_j - bvirt) + (_i - bvirt);
-           _i = _0 - t1;
-           bvirt = _0 - _i;
-           u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-           u3 = _j + _i;
-           bvirt = u3 - _j;
-           u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-           u[3] = u3;
-           var C1len = sum$1(4, B, 4, u, C1);
-
-           s1 = acx * bcytail;
-           c = splitter * acx;
-           ahi = c - (c - acx);
-           alo = acx - ahi;
-           c = splitter * bcytail;
-           bhi = c - (c - bcytail);
-           blo = bcytail - bhi;
-           s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-           t1 = acy * bcxtail;
-           c = splitter * acy;
-           ahi = c - (c - acy);
-           alo = acy - ahi;
-           c = splitter * bcxtail;
-           bhi = c - (c - bcxtail);
-           blo = bcxtail - bhi;
-           t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-           _i = s0 - t0;
-           bvirt = s0 - _i;
-           u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-           _j = s1 + _i;
-           bvirt = _j - s1;
-           _0 = s1 - (_j - bvirt) + (_i - bvirt);
-           _i = _0 - t1;
-           bvirt = _0 - _i;
-           u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-           u3 = _j + _i;
-           bvirt = u3 - _j;
-           u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-           u[3] = u3;
-           var C2len = sum$1(C1len, C1, 4, u, C2);
-
-           s1 = acxtail * bcytail;
-           c = splitter * acxtail;
-           ahi = c - (c - acxtail);
-           alo = acxtail - ahi;
-           c = splitter * bcytail;
-           bhi = c - (c - bcytail);
-           blo = bcytail - bhi;
-           s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-           t1 = acytail * bcxtail;
-           c = splitter * acytail;
-           ahi = c - (c - acytail);
-           alo = acytail - ahi;
-           c = splitter * bcxtail;
-           bhi = c - (c - bcxtail);
-           blo = bcxtail - bhi;
-           t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-           _i = s0 - t0;
-           bvirt = s0 - _i;
-           u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-           _j = s1 + _i;
-           bvirt = _j - s1;
-           _0 = s1 - (_j - bvirt) + (_i - bvirt);
-           _i = _0 - t1;
-           bvirt = _0 - _i;
-           u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-           u3 = _j + _i;
-           bvirt = u3 - _j;
-           u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-           u[3] = u3;
-           var Dlen = sum$1(C2len, C2, 4, u, D);
-
-           return D[Dlen - 1];
-       }
-
-       function orient2d(ax, ay, bx, by, cx, cy) {
-           var detleft = (ay - cy) * (bx - cx);
-           var detright = (ax - cx) * (by - cy);
-           var det = detleft - detright;
-
-           if (detleft === 0 || detright === 0 || (detleft > 0) !== (detright > 0)) { return det; }
-
-           var detsum = Math.abs(detleft + detright);
-           if (Math.abs(det) >= ccwerrboundA * detsum) { return det; }
-
-           return -orient2dadapt(ax, ay, bx, by, cx, cy, detsum);
-       }
-
-       /**
-        * Signed area of the triangle (p0, p1, p2)
-        * @param  {Array.<Number>} p0
-        * @param  {Array.<Number>} p1
-        * @param  {Array.<Number>} p2
-        * @return {Number}
-        */
-       function signedArea(p0, p1, p2) {
-         var res = orient2d(p0[0], p0[1], p1[0], p1[1], p2[0], p2[1]);
-         if (res > 0) { return -1; }
-         if (res < 0) { return 1; }
-         return 0;
-       }
-
-       /**
-        * @param  {SweepEvent} e1
-        * @param  {SweepEvent} e2
-        * @return {Number}
-        */
-       function compareEvents(e1, e2) {
-         var p1 = e1.point;
-         var p2 = e2.point;
-
-         // Different x-coordinate
-         if (p1[0] > p2[0]) { return 1; }
-         if (p1[0] < p2[0]) { return -1; }

 
 

-         // Different points, but same x-coordinate
-         // Event with lower y-coordinate is processed first
-         if (p1[1] !== p2[1]) { return p1[1] > p2[1] ? 1 : -1; }
+           return graph;

 
 

-         return specialCases(e1, e2, p1);
-       }
+           function clonePoints(array) {
+             return array.map(function (p) {
+               return {
+                 id: p.id,
+                 coord: [p.coord[0], p.coord[1]]
+               };
+             });
+           }

 
 

+           function calcMotion(point, i, array) {
+             // don't try to move the endpoints of a non-closed way.
+             if (!isClosed && (i === 0 || i === array.length - 1)) return [0, 0]; // don't try to move a node that appears more than once (self intersection)
+
+             if (nodeCount[array[i].id] > 1) return [0, 0];
+             var a = array[(i - 1 + array.length) % array.length].coord;
+             var origin = point.coord;
+             var b = array[(i + 1) % array.length].coord;
+             var p = geoVecSubtract(a, origin);
+             var q = geoVecSubtract(b, origin);
+             var scale = 2 * Math.min(geoVecLength(p), geoVecLength(q));
+             p = geoVecNormalize(p);
+             q = geoVecNormalize(q);
+             var dotp = p[0] * q[0] + p[1] * q[1];
+             var val = Math.abs(dotp);
+
+             if (val < lowerThreshold) {
+               // nearly orthogonal
+               corner.i = i;
+               corner.dotp = val;
+               var vec = geoVecNormalize(geoVecAdd(p, q));
+               return geoVecScale(vec, 0.1 * dotp * scale);
+             }

 
 

-       /* eslint-disable no-unused-vars */
-       function specialCases(e1, e2, p1, p2) {
-         // Same coordinates, but one is a left endpoint and the other is
-         // a right endpoint. The right endpoint is processed first
-         if (e1.left !== e2.left)
-           { return e1.left ? 1 : -1; }
+             return [0, 0]; // do nothing
+           }
+         }; // if we are only orthogonalizing one vertex,
+         // get that vertex and the previous and next

 
 

-         // const p2 = e1.otherEvent.point, p3 = e2.otherEvent.point;
-         // const sa = (p1[0] - p3[0]) * (p2[1] - p3[1]) - (p2[0] - p3[0]) * (p1[1] - p3[1])
-         // Same coordinates, both events
-         // are left endpoints or right endpoints.
-         // not collinear
-         if (signedArea(p1, e1.otherEvent.point, e2.otherEvent.point) !== 0) {
-           // the event associate to the bottom segment is processed first
-           return (!e1.isBelow(e2.otherEvent.point)) ? 1 : -1;
-         }

 
 

-         return (!e1.isSubject && e2.isSubject) ? 1 : -1;
-       }
-       /* eslint-enable no-unused-vars */
+         function nodeSubset(nodes, vertexID, isClosed) {
+           var first = isClosed ? 0 : 1;
+           var last = isClosed ? nodes.length : nodes.length - 1;

 
 

-       /**
-        * @param  {SweepEvent} se
-        * @param  {Array.<Number>} p
-        * @param  {Queue} queue
-        * @return {Queue}
-        */
-       function divideSegment(se, p, queue)  {
-         var r = new SweepEvent(p, false, se,            se.isSubject);
-         var l = new SweepEvent(p, true,  se.otherEvent, se.isSubject);
+           for (var i = first; i < last; i++) {
+             if (nodes[i].id === vertexID) {
+               return [nodes[(i - 1 + nodes.length) % nodes.length], nodes[i], nodes[(i + 1) % nodes.length]];
+             }
+           }

 
 

-         /* eslint-disable no-console */
-         if (equals(se.point, se.otherEvent.point)) {
-           console.warn('what is that, a collapsed segment?', se);
+           return [];

          }
          }

-         /* eslint-enable no-console */

 
 

-         r.contourId = l.contourId = se.contourId;
+         action.disabled = function (graph) {
+           var way = graph.entity(wayID);
+           way = way.removeNode(''); // sanity check - remove any consecutive duplicates

 
 

-         // avoid a rounding error. The left event would be processed after the right event
-         if (compareEvents(l, se.otherEvent) > 0) {
-           se.otherEvent.left = true;
-           l.left = false;
-         }
-
-         // avoid a rounding error. The left event would be processed after the right event
-         // if (compareEvents(se, r) > 0) {}
+           graph = graph.replace(way);
+           var isClosed = way.isClosed();
+           var nodes = graph.childNodes(way).slice(); // shallow copy

 
 

-         se.otherEvent.otherEvent = l;
-         se.otherEvent = r;
+           if (isClosed) nodes.pop();
+           var allowStraightAngles = false;

 
 

-         queue.push(l);
-         queue.push(r);
+           if (vertexID !== undefined) {
+             allowStraightAngles = true;
+             nodes = nodeSubset(nodes, vertexID, isClosed);
+             if (nodes.length !== 3) return 'end_vertex';
+           }

 
 

-         return queue;
-       }
+           var coords = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);

 
 

-       //const EPS = 1e-9;
+           if (score === null) {
+             return 'not_squarish';
+           } else if (score === 0) {
+             return 'square_enough';
+           } else {
+             return false;
+           }
+         };

 
 

-       /**
-        * Finds the magnitude of the cross product of two vectors (if we pretend
-        * they're in three dimensions)
-        *
-        * @param {Object} a First vector
-        * @param {Object} b Second vector
-        * @private
-        * @returns {Number} The magnitude of the cross product
-        */
-       function crossProduct(a, b) {
-         return (a[0] * b[1]) - (a[1] * b[0]);
+         action.transitionable = true;
+         return action;

        }
 
        }
 

-       /**
-        * Finds the dot product of two vectors.
-        *
-        * @param {Object} a First vector
-        * @param {Object} b Second vector
-        * @private
-        * @returns {Number} The dot product
-        */
-       function dotProduct(a, b) {
-         return (a[0] * b[0]) + (a[1] * b[1]);
-       }
+       //
+       // `turn` must be an `osmTurn` object
+       // see osm/intersection.js, pathToTurn()
+       //
+       // This specifies a restriction of type `restriction` when traveling from
+       // `turn.from.way` toward `turn.to.way` via `turn.via.node` OR `turn.via.ways`.
+       // (The action does not check that these entities form a valid intersection.)
+       //
+       // From, to, and via ways should be split before calling this action.
+       // (old versions of the code would split the ways here, but we no longer do it)
+       //
+       // For testing convenience, accepts a restrictionID to assign to the new
+       // relation. Normally, this will be undefined and the relation will
+       // automatically be assigned a new ID.
+       //

 
 

-       /**
-        * Finds the intersection (if any) between two line segments a and b, given the
-        * line segments' end points a1, a2 and b1, b2.
-        *
-        * This algorithm is based on Schneider and Eberly.
-        * http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf
-        * Page 244.
-        *
-        * @param {Array.<Number>} a1 point of first line
-        * @param {Array.<Number>} a2 point of first line
-        * @param {Array.<Number>} b1 point of second line
-        * @param {Array.<Number>} b2 point of second line
-        * @param {Boolean=}       noEndpointTouch whether to skip single touchpoints
-        *                                         (meaning connected segments) as
-        *                                         intersections
-        * @returns {Array.<Array.<Number>>|Null} If the lines intersect, the point of
-        * intersection. If they overlap, the two end points of the overlapping segment.
-        * Otherwise, null.
-        */
-       function intersection (a1, a2, b1, b2, noEndpointTouch) {
-         // The algorithm expects our lines in the form P + sd, where P is a point,
-         // s is on the interval [0, 1], and d is a vector.
-         // We are passed two points. P can be the first point of each pair. The
-         // vector, then, could be thought of as the distance (in x and y components)
-         // from the first point to the second point.
-         // So first, let's make our vectors:
-         var va = [a2[0] - a1[0], a2[1] - a1[1]];
-         var vb = [b2[0] - b1[0], b2[1] - b1[1]];
-         // We also define a function to convert back to regular point form:
-
-         /* eslint-disable arrow-body-style */
-
-         function toPoint(p, s, d) {
-           return [
-             p[0] + s * d[0],
-             p[1] + s * d[1]
-           ];
-         }
+       function actionRestrictTurn(turn, restrictionType, restrictionID) {
+         return function (graph) {
+           var fromWay = graph.entity(turn.from.way);
+           var toWay = graph.entity(turn.to.way);
+           var viaNode = turn.via.node && graph.entity(turn.via.node);
+           var viaWays = turn.via.ways && turn.via.ways.map(function (id) {
+             return graph.entity(id);
+           });
+           var members = [];
+           members.push({
+             id: fromWay.id,
+             type: 'way',
+             role: 'from'
+           });

 
 

-         /* eslint-enable arrow-body-style */
-
-         // The rest is pretty much a straight port of the algorithm.
-         var e = [b1[0] - a1[0], b1[1] - a1[1]];
-         var kross    = crossProduct(va, vb);
-         var sqrKross = kross * kross;
-         var sqrLenA  = dotProduct(va, va);
-         //const sqrLenB  = dotProduct(vb, vb);
-
-         // Check for line intersection. This works because of the properties of the
-         // cross product -- specifically, two vectors are parallel if and only if the
-         // cross product is the 0 vector. The full calculation involves relative error
-         // to account for possible very small line segments. See Schneider & Eberly
-         // for details.
-         if (sqrKross > 0/* EPS * sqrLenB * sqLenA */) {
-           // If they're not parallel, then (because these are line segments) they
-           // still might not actually intersect. This code checks that the
-           // intersection point of the lines is actually on both line segments.
-           var s = crossProduct(e, vb) / kross;
-           if (s < 0 || s > 1) {
-             // not on line segment a
-             return null;
-           }
-           var t = crossProduct(e, va) / kross;
-           if (t < 0 || t > 1) {
-             // not on line segment b
-             return null;
-           }
-           if (s === 0 || s === 1) {
-             // on an endpoint of line segment a
-             return noEndpointTouch ? null : [toPoint(a1, s, va)];
-           }
-           if (t === 0 || t === 1) {
-             // on an endpoint of line segment b
-             return noEndpointTouch ? null : [toPoint(b1, t, vb)];
+           if (viaNode) {
+             members.push({
+               id: viaNode.id,
+               type: 'node',
+               role: 'via'
+             });
+           } else if (viaWays) {
+             viaWays.forEach(function (viaWay) {
+               members.push({
+                 id: viaWay.id,
+                 type: 'way',
+                 role: 'via'
+               });
+             });

            }
            }

-           return [toPoint(a1, s, va)];
-         }

 
 

-         // If we've reached this point, then the lines are either parallel or the
-         // same, but the segments could overlap partially or fully, or not at all.
-         // So we need to find the overlap, if any. To do that, we can use e, which is
-         // the (vector) difference between the two initial points. If this is parallel
-         // with the line itself, then the two lines are the same line, and there will
-         // be overlap.
-         //const sqrLenE = dotProduct(e, e);
-         kross = crossProduct(e, va);
-         sqrKross = kross * kross;
-
-         if (sqrKross > 0 /* EPS * sqLenB * sqLenE */) {
-         // Lines are just parallel, not the same. No overlap.
-           return null;
-         }
+           members.push({
+             id: toWay.id,
+             type: 'way',
+             role: 'to'
+           });
+           return graph.replace(osmRelation({
+             id: restrictionID,
+             tags: {
+               type: 'restriction',
+               restriction: restrictionType
+             },
+             members: members
+           }));
+         };
+       }

 
 

-         var sa = dotProduct(va, e) / sqrLenA;
-         var sb = sa + dotProduct(va, vb) / sqrLenA;
-         var smin = Math.min(sa, sb);
-         var smax = Math.max(sa, sb);
+       function actionRevert(id) {
+         var action = function action(graph) {
+           var entity = graph.hasEntity(id),
+               base = graph.base().entities[id];
+
+           if (entity && !base) {
+             // entity will be removed..
+             if (entity.type === 'node') {
+               graph.parentWays(entity).forEach(function (parent) {
+                 parent = parent.removeNode(id);
+                 graph = graph.replace(parent);
+
+                 if (parent.isDegenerate()) {
+                   graph = actionDeleteWay(parent.id)(graph);
+                 }
+               });
+             }

 
 

-         // this is, essentially, the FindIntersection acting on floats from
-         // Schneider & Eberly, just inlined into this function.
-         if (smin <= 1 && smax >= 0) {
+             graph.parentRelations(entity).forEach(function (parent) {
+               parent = parent.removeMembersWithID(id);
+               graph = graph.replace(parent);

 
 

-           // overlap on an end point
-           if (smin === 1) {
-             return noEndpointTouch ? null : [toPoint(a1, smin > 0 ? smin : 0, va)];
+               if (parent.isDegenerate()) {
+                 graph = actionDeleteRelation(parent.id)(graph);
+               }
+             });

            }
 
            }
 

-           if (smax === 0) {
-             return noEndpointTouch ? null : [toPoint(a1, smax < 1 ? smax : 1, va)];
-           }
+           return graph.revert(id);
+         };

 
 

-           if (noEndpointTouch && smin === 0 && smax === 1) { return null; }
+         return action;
+       }

 
 

-           // There's overlap on a segment -- two points of intersection. Return both.
-           return [
-             toPoint(a1, smin > 0 ? smin : 0, va),
-             toPoint(a1, smax < 1 ? smax : 1, va)
-           ];
-         }
+       function actionRotate(rotateIds, pivot, angle, projection) {
+         var action = function action(graph) {
+           return graph.update(function (graph) {
+             utilGetAllNodes(rotateIds, graph).forEach(function (node) {
+               var point = geoRotate([projection(node.loc)], angle, pivot)[0];
+               graph = graph.replace(node.move(projection.invert(point)));
+             });
+           });
+         };

 
 

-         return null;
+         return action;

        }
 
        }
 

-       /**
-        * @param  {SweepEvent} se1
-        * @param  {SweepEvent} se2
-        * @param  {Queue}      queue
-        * @return {Number}
-        */
-       function possibleIntersection (se1, se2, queue) {
-         // that disallows self-intersecting polygons,
-         // did cost us half a day, so I'll leave it
-         // out of respect
-         // if (se1.isSubject === se2.isSubject) return;
-         var inter = intersection(
-           se1.point, se1.otherEvent.point,
-           se2.point, se2.otherEvent.point
-         );
+       function actionScale(ids, pivotLoc, scaleFactor, projection) {
+         return function (graph) {
+           return graph.update(function (graph) {
+             var point, radial;
+             utilGetAllNodes(ids, graph).forEach(function (node) {
+               point = projection(node.loc);
+               radial = [point[0] - pivotLoc[0], point[1] - pivotLoc[1]];
+               point = [pivotLoc[0] + scaleFactor * radial[0], pivotLoc[1] + scaleFactor * radial[1]];
+               graph = graph.replace(node.move(projection.invert(point)));
+             });
+           });
+         };
+       }

 
 

-         var nintersections = inter ? inter.length : 0;
-         if (nintersections === 0) { return 0; } // no intersection
+       /* Align nodes along their common axis */

 
 

-         // the line segments intersect at an endpoint of both line segments
-         if ((nintersections === 1) &&
-             (equals(se1.point, se2.point) ||
-              equals(se1.otherEvent.point, se2.otherEvent.point))) {
-           return 0;
-         }
+       function actionStraightenNodes(nodeIDs, projection) {
+         function positionAlongWay(a, o, b) {
+           return geoVecDot(a, b, o) / geoVecDot(b, b, o);
+         } // returns the endpoints of the long axis of symmetry of the `points` bounding rect

 
 

-         if (nintersections === 2 && se1.isSubject === se2.isSubject) {
-           // if(se1.contourId === se2.contourId){
-           // console.warn('Edges of the same polygon overlap',
-           //   se1.point, se1.otherEvent.point, se2.point, se2.otherEvent.point);
-           // }
-           //throw new Error('Edges of the same polygon overlap');
-           return 0;
-         }

 
 

-         // The line segments associated to se1 and se2 intersect
-         if (nintersections === 1) {
+         function getEndpoints(points) {
+           var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
+           // The shape's surrounding rectangle has 2 axes of symmetry.
+           // Snap points to the long axis

 
 

-           // if the intersection point is not an endpoint of se1
-           if (!equals(se1.point, inter[0]) && !equals(se1.otherEvent.point, inter[0])) {
-             divideSegment(se1, inter[0], queue);
-           }
+           var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
+           var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
+           var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
+           var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
+           var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);

 
 

-           // if the intersection point is not an endpoint of se2
-           if (!equals(se2.point, inter[0]) && !equals(se2.otherEvent.point, inter[0])) {
-             divideSegment(se2, inter[0], queue);
+           if (isLong) {
+             return [p1, q1];

            }
            }

-           return 1;
-         }
-
-         // The line segments associated to se1 and se2 overlap
-         var events        = [];
-         var leftCoincide  = false;
-         var rightCoincide = false;
-
-         if (equals(se1.point, se2.point)) {
-           leftCoincide = true; // linked
-         } else if (compareEvents(se1, se2) === 1) {
-           events.push(se2, se1);
-         } else {
-           events.push(se1, se2);
-         }

 
 

-         if (equals(se1.otherEvent.point, se2.otherEvent.point)) {
-           rightCoincide = true;
-         } else if (compareEvents(se1.otherEvent, se2.otherEvent) === 1) {
-           events.push(se2.otherEvent, se1.otherEvent);
-         } else {
-           events.push(se1.otherEvent, se2.otherEvent);
+           return [p2, q2];

          }
 
          }
 

-         if ((leftCoincide && rightCoincide) || leftCoincide) {
-           // both line segments are equal or share the left endpoint
-           se2.type = NON_CONTRIBUTING;
-           se1.type = (se2.inOut === se1.inOut)
-             ? SAME_TRANSITION : DIFFERENT_TRANSITION;
+         var action = function action(graph, t) {
+           if (t === null || !isFinite(t)) t = 1;
+           t = Math.min(Math.max(+t, 0), 1);
+           var nodes = nodeIDs.map(function (id) {
+             return graph.entity(id);
+           });
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var endpoints = getEndpoints(points);
+           var startPoint = endpoints[0];
+           var endPoint = endpoints[1]; // Move points onto the line connecting the endpoints

 
 

-           if (leftCoincide && !rightCoincide) {
-             // honestly no idea, but changing events selection from [2, 1]
-             // to [0, 1] fixes the overlapping self-intersecting polygons issue
-             divideSegment(events[1].otherEvent, events[0].point, queue);
+           for (var i = 0; i < points.length; i++) {
+             var node = nodes[i];
+             var point = points[i];
+             var u = positionAlongWay(point, startPoint, endPoint);
+             var point2 = geoVecInterp(startPoint, endPoint, u);
+             var loc2 = projection.invert(point2);
+             graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));

            }
            }

-           return 2;
-         }

 
 

-         // the line segments share the right endpoint
-         if (rightCoincide) {
-           divideSegment(events[0], events[1].point, queue);
-           return 3;
-         }
+           return graph;
+         };

 
 

-         // no line segment includes totally the other one
-         if (events[0] !== events[3].otherEvent) {
-           divideSegment(events[0], events[1].point, queue);
-           divideSegment(events[1], events[2].point, queue);
-           return 3;
-         }
+         action.disabled = function (graph) {
+           var nodes = nodeIDs.map(function (id) {
+             return graph.entity(id);
+           });
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var endpoints = getEndpoints(points);
+           var startPoint = endpoints[0];
+           var endPoint = endpoints[1];
+           var maxDistance = 0;
+
+           for (var i = 0; i < points.length; i++) {
+             var point = points[i];
+             var u = positionAlongWay(point, startPoint, endPoint);
+             var p = geoVecInterp(startPoint, endPoint, u);
+             var dist = geoVecLength(p, point);
+
+             if (!isNaN(dist) && dist > maxDistance) {
+               maxDistance = dist;
+             }
+           }

 
 

-         // one line segment includes the other one
-         divideSegment(events[0], events[1].point, queue);
-         divideSegment(events[3].otherEvent, events[2].point, queue);
+           if (maxDistance < 0.0001) {
+             return 'straight_enough';
+           }
+         };

 
 

-         return 3;
+         action.transitionable = true;
+         return action;

        }
 
        }
 

-       /**
-        * @param  {SweepEvent} le1
-        * @param  {SweepEvent} le2
-        * @return {Number}
+       /*
+        * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as

         */
         */

-       function compareSegments(le1, le2) {
-         if (le1 === le2) { return 0; }

 
 

-         // Segments are not collinear
-         if (signedArea(le1.point, le1.otherEvent.point, le2.point) !== 0 ||
-           signedArea(le1.point, le1.otherEvent.point, le2.otherEvent.point) !== 0) {
+       function actionStraightenWay(selectedIDs, projection) {
+         function positionAlongWay(a, o, b) {
+           return geoVecDot(a, b, o) / geoVecDot(b, b, o);
+         } // Return all selected ways as a continuous, ordered array of nodes

 
 

-           // If they share their left endpoint use the right endpoint to sort
-           if (equals(le1.point, le2.point)) { return le1.isBelow(le2.otherEvent.point) ? -1 : 1; }

 
 

-           // Different left endpoint: use the left endpoint to sort
-           if (le1.point[0] === le2.point[0]) { return le1.point[1] < le2.point[1] ? -1 : 1; }
+         function allNodes(graph) {
+           var nodes = [];
+           var startNodes = [];
+           var endNodes = [];
+           var remainingWays = [];
+           var selectedWays = selectedIDs.filter(function (w) {
+             return graph.entity(w).type === 'way';
+           });
+           var selectedNodes = selectedIDs.filter(function (n) {
+             return graph.entity(n).type === 'node';
+           });

 
 

-           // has the line segment associated to e1 been inserted
-           // into S after the line segment associated to e2 ?
-           if (compareEvents(le1, le2) === 1) { return le2.isAbove(le1.point) ? -1 : 1; }
+           for (var i = 0; i < selectedWays.length; i++) {
+             var way = graph.entity(selectedWays[i]);
+             nodes = way.nodes.slice(0);
+             remainingWays.push(nodes);
+             startNodes.push(nodes[0]);
+             endNodes.push(nodes[nodes.length - 1]);
+           } // Remove duplicate end/startNodes (duplicate nodes cannot be at the line end,
+           //   and need to be removed so currNode difference calculation below works)
+           // i.e. ["n-1", "n-1", "n-2"] => ["n-2"]

 
 

-           // The line segment associated to e2 has been inserted
-           // into S after the line segment associated to e1
-           return le1.isBelow(le2.point) ? -1 : 1;
-         }

 
 

-         if (le1.isSubject === le2.isSubject) { // same polygon
-           var p1 = le1.point, p2 = le2.point;
-           if (p1[0] === p2[0] && p1[1] === p2[1]/*equals(le1.point, le2.point)*/) {
-             p1 = le1.otherEvent.point; p2 = le2.otherEvent.point;
-             if (p1[0] === p2[0] && p1[1] === p2[1]) { return 0; }
-             else { return le1.contourId > le2.contourId ? 1 : -1; }
-           }
-         } else { // Segments are collinear, but belong to separate polygons
-           return le1.isSubject ? -1 : 1;
-         }
+           startNodes = startNodes.filter(function (n) {
+             return startNodes.indexOf(n) === startNodes.lastIndexOf(n);
+           });
+           endNodes = endNodes.filter(function (n) {
+             return endNodes.indexOf(n) === endNodes.lastIndexOf(n);
+           }); // Choose the initial endpoint to start from

 
 

-         return compareEvents(le1, le2) === 1 ? 1 : -1;
-       }
+           var currNode = utilArrayDifference(startNodes, endNodes).concat(utilArrayDifference(endNodes, startNodes))[0];
+           var nextWay = [];
+           nodes = []; // Create nested function outside of loop to avoid "function in loop" lint error

 
 

-       function subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation) {
-         var sweepLine = new SplayTree(compareSegments);
-         var sortedEvents = [];
+           var getNextWay = function getNextWay(currNode, remainingWays) {
+             return remainingWays.filter(function (way) {
+               return way[0] === currNode || way[way.length - 1] === currNode;
+             })[0];
+           }; // Add nodes to end of nodes array, until all ways are added

 
 

-         var rightbound = Math.min(sbbox[2], cbbox[2]);

 
 

-         var prev, next, begin;
+           while (remainingWays.length) {
+             nextWay = getNextWay(currNode, remainingWays);
+             remainingWays = utilArrayDifference(remainingWays, [nextWay]);

 
 

-         while (eventQueue.length !== 0) {
-           var event = eventQueue.pop();
-           sortedEvents.push(event);
+             if (nextWay[0] !== currNode) {
+               nextWay.reverse();
+             }

 
 

-           // optimization by bboxes for intersection and difference goes here
-           if ((operation === INTERSECTION && event.point[0] > rightbound) ||
-               (operation === DIFFERENCE   && event.point[0] > sbbox[2])) {
-             break;
-           }
+             nodes = nodes.concat(nextWay);
+             currNode = nodes[nodes.length - 1];
+           } // If user selected 2 nodes to straighten between, then slice nodes array to those nodes

 
 

-           if (event.left) {
-             next  = prev = sweepLine.insert(event);
-             begin = sweepLine.minNode();

 
 

-             if (prev !== begin) { prev = sweepLine.prev(prev); }
-             else                { prev = null; }
+           if (selectedNodes.length === 2) {
+             var startNodeIdx = nodes.indexOf(selectedNodes[0]);
+             var endNodeIdx = nodes.indexOf(selectedNodes[1]);
+             var sortedStartEnd = [startNodeIdx, endNodeIdx];
+             sortedStartEnd.sort(function (a, b) {
+               return a - b;
+             });
+             nodes = nodes.slice(sortedStartEnd[0], sortedStartEnd[1] + 1);
+           }

 
 

-             next = sweepLine.next(next);
+           return nodes.map(function (n) {
+             return graph.entity(n);
+           });
+         }

 
 

-             var prevEvent = prev ? prev.key : null;
-             var prevprevEvent = (void 0);
-             computeFields(event, prevEvent, operation);
-             if (next) {
-               if (possibleIntersection(event, next.key, eventQueue) === 2) {
-                 computeFields(event, prevEvent, operation);
-                 computeFields(event, next.key, operation);
-               }
-             }
+         function shouldKeepNode(node, graph) {
+           return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+         }
+
+         var action = function action(graph, t) {
+           if (t === null || !isFinite(t)) t = 1;
+           t = Math.min(Math.max(+t, 0), 1);
+           var nodes = allNodes(graph);
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var startPoint = points[0];
+           var endPoint = points[points.length - 1];
+           var toDelete = [];
+           var i;

 
 

-             if (prev) {
-               if (possibleIntersection(prev.key, event, eventQueue) === 2) {
-                 var prevprev = prev;
-                 if (prevprev !== begin) { prevprev = sweepLine.prev(prevprev); }
-                 else                    { prevprev = null; }
+           for (i = 1; i < points.length - 1; i++) {
+             var node = nodes[i];
+             var point = points[i];

 
 

-                 prevprevEvent = prevprev ? prevprev.key : null;
-                 computeFields(prevEvent, prevprevEvent, operation);
-                 computeFields(event,     prevEvent,     operation);
+             if (t < 1 || shouldKeepNode(node, graph)) {
+               var u = positionAlongWay(point, startPoint, endPoint);
+               var p = geoVecInterp(startPoint, endPoint, u);
+               var loc2 = projection.invert(p);
+               graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
+             } else {
+               // safe to delete
+               if (toDelete.indexOf(node) === -1) {
+                 toDelete.push(node);

                }
              }
                }
              }

-           } else {
-             event = event.otherEvent;
-             next = prev = sweepLine.find(event);
+           }

 
 

-             if (prev && next) {
+           for (i = 0; i < toDelete.length; i++) {
+             graph = actionDeleteNode(toDelete[i].id)(graph);
+           }

 
 

-               if (prev !== begin) { prev = sweepLine.prev(prev); }
-               else                { prev = null; }
+           return graph;
+         };

 
 

-               next = sweepLine.next(next);
-               sweepLine.remove(event);
+         action.disabled = function (graph) {
+           // check way isn't too bendy
+           var nodes = allNodes(graph);
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var startPoint = points[0];
+           var endPoint = points[points.length - 1];
+           var threshold = 0.2 * geoVecLength(startPoint, endPoint);
+           var i;

 
 

-               if (next && prev) {
-                 possibleIntersection(prev.key, next.key, eventQueue);
-               }
-             }
+           if (threshold === 0) {
+             return 'too_bendy';

            }
            }

-         }
-         return sortedEvents;
-       }

 
 

-       var Contour = function Contour() {
-         this.points = [];
-         this.holeIds = [];
-         this.holeOf = null;
-         this.depth = null;
-       };
+           var maxDistance = 0;

 
 

-       Contour.prototype.isExterior = function isExterior () {
-         return this.holeOf == null;
-       };
+           for (i = 1; i < points.length - 1; i++) {
+             var point = points[i];
+             var u = positionAlongWay(point, startPoint, endPoint);
+             var p = geoVecInterp(startPoint, endPoint, u);
+             var dist = geoVecLength(p, point); // to bendy if point is off by 20% of total start/end distance in projected space

 
 

-       /**
-        * @param  {Array.<SweepEvent>} sortedEvents
-        * @return {Array.<SweepEvent>}
-        */
-       function orderEvents(sortedEvents) {
-         var event, i, len, tmp;
-         var resultEvents = [];
-         for (i = 0, len = sortedEvents.length; i < len; i++) {
-           event = sortedEvents[i];
-           if ((event.left && event.inResult) ||
-             (!event.left && event.otherEvent.inResult)) {
-             resultEvents.push(event);
-           }
-         }
-         // Due to overlapping edges the resultEvents array can be not wholly sorted
-         var sorted = false;
-         while (!sorted) {
-           sorted = true;
-           for (i = 0, len = resultEvents.length; i < len; i++) {
-             if ((i + 1) < len &&
-               compareEvents(resultEvents[i], resultEvents[i + 1]) === 1) {
-               tmp = resultEvents[i];
-               resultEvents[i] = resultEvents[i + 1];
-               resultEvents[i + 1] = tmp;
-               sorted = false;
+             if (isNaN(dist) || dist > threshold) {
+               return 'too_bendy';
+             } else if (dist > maxDistance) {
+               maxDistance = dist;

              }
            }
              }
            }

-         }

 
 

+           var keepingAllNodes = nodes.every(function (node, i) {
+             return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
+           });

 
 

-         for (i = 0, len = resultEvents.length; i < len; i++) {
-           event = resultEvents[i];
-           event.otherPos = i;
-         }
-
-         // imagine, the right event is found in the beginning of the queue,
-         // when his left counterpart is not marked yet
-         for (i = 0, len = resultEvents.length; i < len; i++) {
-           event = resultEvents[i];
-           if (!event.left) {
-             tmp = event.otherPos;
-             event.otherPos = event.otherEvent.otherPos;
-             event.otherEvent.otherPos = tmp;
+           if (maxDistance < 0.0001 && // Allow straightening even if already straight in order to remove extraneous nodes
+           keepingAllNodes) {
+             return 'straight_enough';

            }
            }

-         }
+         };

 
 

-         return resultEvents;
+         action.transitionable = true;
+         return action;

        }
 
        }
 

+       //
+       // `turn` must be an `osmTurn` object with a `restrictionID` property.
+       // see osm/intersection.js, pathToTurn()
+       //

 
 

-       /**
-        * @param  {Number} pos
-        * @param  {Array.<SweepEvent>} resultEvents
-        * @param  {Object>}    processed
-        * @return {Number}
-        */
-       function nextPos(pos, resultEvents, processed, origPos) {
-         var newPos = pos + 1,
-             p = resultEvents[pos].point,
-             p1;
-         var length = resultEvents.length;
-
-         if (newPos < length)
-           { p1 = resultEvents[newPos].point; }
-
-         while (newPos < length && p1[0] === p[0] && p1[1] === p[1]) {
-           if (!processed[newPos]) {
-             return newPos;
-           } else   {
-             newPos++;
-           }
-           p1 = resultEvents[newPos].point;
-         }
-
-         newPos = pos - 1;
-
-         while (processed[newPos] && newPos > origPos) {
-           newPos--;
-         }
-
-         return newPos;
-       }
-
-
-       function initializeContourFromContext(event, contours, contourId) {
-         var contour = new Contour();
-         if (event.prevInResult != null) {
-           var prevInResult = event.prevInResult;
-           // Note that it is valid to query the "previous in result" for its output contour id,
-           // because we must have already processed it (i.e., assigned an output contour id)
-           // in an earlier iteration, otherwise it wouldn't be possible that it is "previous in
-           // result".
-           var lowerContourId = prevInResult.outputContourId;
-           var lowerResultTransition = prevInResult.resultTransition;
-           if (lowerResultTransition > 0) {
-             // We are inside. Now we have to check if the thing below us is another hole or
-             // an exterior contour.
-             var lowerContour = contours[lowerContourId];
-             if (lowerContour.holeOf != null) {
-               // The lower contour is a hole => Connect the new contour as a hole to its parent,
-               // and use same depth.
-               var parentContourId = lowerContour.holeOf;
-               contours[parentContourId].holeIds.push(contourId);
-               contour.holeOf = parentContourId;
-               contour.depth = contours[lowerContourId].depth;
-             } else {
-               // The lower contour is an exterior contour => Connect the new contour as a hole,
-               // and increment depth.
-               contours[lowerContourId].holeIds.push(contourId);
-               contour.holeOf = lowerContourId;
-               contour.depth = contours[lowerContourId].depth + 1;
-             }
-           } else {
-             // We are outside => this contour is an exterior contour of same depth.
-             contour.holeOf = null;
-             contour.depth = contours[lowerContourId].depth;
-           }
-         } else {
-           // There is no lower/previous contour => this contour is an exterior contour of depth 0.
-           contour.holeOf = null;
-           contour.depth = 0;
-         }
-         return contour;
+       function actionUnrestrictTurn(turn) {
+         return function (graph) {
+           return actionDeleteRelation(turn.restrictionID)(graph);
+         };

        }
 
        }
 

-       /**
-        * @param  {Array.<SweepEvent>} sortedEvents
-        * @return {Array.<*>} polygons
-        */
-       function connectEdges(sortedEvents) {
-         var i, len;
-         var resultEvents = orderEvents(sortedEvents);
+       /* Reflect the given area around its axis of symmetry */
+
+       function actionReflect(reflectIds, projection) {
+         var _useLongAxis = true;
+
+         var action = function action(graph, t) {
+           if (t === null || !isFinite(t)) t = 1;
+           t = Math.min(Math.max(+t, 0), 1);
+           var nodes = utilGetAllNodes(reflectIds, graph);
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
+           // The shape's surrounding rectangle has 2 axes of symmetry.
+           // Reflect across the longer axis by default.
+
+           var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
+           var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
+           var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
+           var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
+           var p, q;
+           var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
+
+           if (_useLongAxis && isLong || !_useLongAxis && !isLong) {
+             p = p1;
+             q = q1;
+           } else {
+             p = p2;
+             q = q2;
+           } // reflect c across pq
+           // http://math.stackexchange.com/questions/65503/point-reflection-over-a-line

 
 

-         // "false"-filled array
-         var processed = {};
-         var contours = [];

 
 

-         var loop = function (  ) {
+           var dx = q[0] - p[0];
+           var dy = q[1] - p[1];
+           var a = (dx * dx - dy * dy) / (dx * dx + dy * dy);
+           var b = 2 * dx * dy / (dx * dx + dy * dy);

 
 

-           if (processed[i]) {
-             return;
+           for (var i = 0; i < nodes.length; i++) {
+             var node = nodes[i];
+             var c = projection(node.loc);
+             var c2 = [a * (c[0] - p[0]) + b * (c[1] - p[1]) + p[0], b * (c[0] - p[0]) - a * (c[1] - p[1]) + p[1]];
+             var loc2 = projection.invert(c2);
+             node = node.move(geoVecInterp(node.loc, loc2, t));
+             graph = graph.replace(node);

            }
 
            }
 

-           var contourId = contours.length;
-           var contour = initializeContourFromContext(resultEvents[i], contours, contourId);
+           return graph;
+         };

 
 

-           // Helper function that combines marking an event as processed with assigning its output contour ID
-           var markAsProcessed = function (pos) {
-             processed[pos] = true;
-             resultEvents[pos].outputContourId = contourId;
-           };
+         action.useLongAxis = function (val) {
+           if (!arguments.length) return _useLongAxis;
+           _useLongAxis = val;
+           return action;
+         };

 
 

-           var pos = i;
-           var origPos = i;
+         action.transitionable = true;
+         return action;
+       }

 
 

-           var initial = resultEvents[i].point;
-           contour.points.push(initial);
+       function actionUpgradeTags(entityId, oldTags, replaceTags) {
+         return function (graph) {
+           var entity = graph.entity(entityId);
+           var tags = Object.assign({}, entity.tags); // shallow copy

 
 

-           /* eslint no-constant-condition: "off" */
-           while (true) {
-             markAsProcessed(pos);
+           var transferValue;
+           var semiIndex;

 
 

-             pos = resultEvents[pos].otherPos;
+           for (var oldTagKey in oldTags) {
+             if (!(oldTagKey in tags)) continue; // wildcard match

 
 

-             markAsProcessed(pos);
-             contour.points.push(resultEvents[pos].point);
+             if (oldTags[oldTagKey] === '*') {
+               // note the value since we might need to transfer it
+               transferValue = tags[oldTagKey];
+               delete tags[oldTagKey]; // exact match
+             } else if (oldTags[oldTagKey] === tags[oldTagKey]) {
+               delete tags[oldTagKey]; // match is within semicolon-delimited values
+             } else {
+               var vals = tags[oldTagKey].split(';').filter(Boolean);
+               var oldIndex = vals.indexOf(oldTags[oldTagKey]);

 
 

-             pos = nextPos(pos, resultEvents, processed, origPos);
+               if (vals.length === 1 || oldIndex === -1) {
+                 delete tags[oldTagKey];
+               } else {
+                 if (replaceTags && replaceTags[oldTagKey]) {
+                   // replacing a value within a semicolon-delimited value, note the index
+                   semiIndex = oldIndex;
+                 }

 
 

-             if (pos == origPos) {
-               break;
+                 vals.splice(oldIndex, 1);
+                 tags[oldTagKey] = vals.join(';');
+               }

              }
            }
 
              }
            }
 

-           contours.push(contour);
-         };
+           if (replaceTags) {
+             for (var replaceKey in replaceTags) {
+               var replaceValue = replaceTags[replaceKey];

 
 

-         for (i = 0, len = resultEvents.length; i < len; i++) loop(  );
+               if (replaceValue === '*') {
+                 if (tags[replaceKey] && tags[replaceKey] !== 'no') {
+                   // allow any pre-existing value except `no` (troll tag)
+                   continue;
+                 } else {
+                   // otherwise assume `yes` is okay
+                   tags[replaceKey] = 'yes';
+                 }
+               } else if (replaceValue === '$1') {
+                 tags[replaceKey] = transferValue;
+               } else {
+                 if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
+                   // don't override preexisting values
+                   var existingVals = tags[replaceKey].split(';').filter(Boolean);

 
 

-         return contours;
-       }
+                   if (existingVals.indexOf(replaceValue) === -1) {
+                     existingVals.splice(semiIndex, 0, replaceValue);
+                     tags[replaceKey] = existingVals.join(';');
+                   }
+                 } else {
+                   tags[replaceKey] = replaceValue;
+                 }
+               }
+             }
+           }

 
 

-       var tinyqueue = TinyQueue;
-       var _default$1 = TinyQueue;
+           return graph.replace(entity.update({
+             tags: tags
+           }));
+         };
+       }

 
 

-       function TinyQueue(data, compare) {
-           if (!(this instanceof TinyQueue)) { return new TinyQueue(data, compare); }
+       function behaviorEdit(context) {
+         function behavior() {
+           context.map().minzoom(context.minEditableZoom());
+         }

 
 

-           this.data = data || [];
-           this.length = this.data.length;
-           this.compare = compare || defaultCompare$1;
+         behavior.off = function () {
+           context.map().minzoom(0);
+         };

 
 

-           if (this.length > 0) {
-               for (var i = (this.length >> 1) - 1; i >= 0; i--) { this._down(i); }
-           }
+         return behavior;

        }
 
        }
 

-       function defaultCompare$1(a, b) {
-           return a < b ? -1 : a > b ? 1 : 0;
-       }
+       /*
+          The hover behavior adds the `.hover` class on pointerover to all elements to which
+          the identical datum is bound, and removes it on pointerout.

 
 

-       TinyQueue.prototype = {
+          The :hover pseudo-class is insufficient for iD's purposes because a datum's visual
+          representation may consist of several elements scattered throughout the DOM hierarchy.
+          Only one of these elements can have the :hover pseudo-class, but all of them will
+          have the .hover class.
+        */

 
 

-           push: function (item) {
-               this.data.push(item);
-               this.length++;
-               this._up(this.length - 1);
-           },
+       function behaviorHover(context) {
+         var dispatch = dispatch$8('hover');

 
 

-           pop: function () {
-               if (this.length === 0) { return undefined; }
+         var _selection = select(null);

 
 

-               var top = this.data[0];
-               this.length--;
+         var _newNodeId = null;
+         var _initialNodeID = null;

 
 

-               if (this.length > 0) {
-                   this.data[0] = this.data[this.length];
-                   this._down(0);
-               }
-               this.data.pop();
+         var _altDisables;

 
 

-               return top;
-           },
+         var _ignoreVertex;

 
 

-           peek: function () {
-               return this.data[0];
-           },
+         var _targets = []; // use pointer events on supported platforms; fallback to mouse events

 
 

-           _up: function (pos) {
-               var data = this.data;
-               var compare = this.compare;
-               var item = data[pos];
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

 
 

-               while (pos > 0) {
-                   var parent = (pos - 1) >> 1;
-                   var current = data[parent];
-                   if (compare(item, current) >= 0) { break; }
-                   data[pos] = current;
-                   pos = parent;
-               }
+         function keydown(d3_event) {
+           if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             _selection.selectAll('.hover').classed('hover-suppressed', true).classed('hover', false);

 
 

-               data[pos] = item;
-           },
+             _selection.classed('hover-disabled', true);

 
 

-           _down: function (pos) {
-               var data = this.data;
-               var compare = this.compare;
-               var halfLength = this.length >> 1;
-               var item = data[pos];
+             dispatch.call('hover', this, null);
+           }
+         }

 
 

-               while (pos < halfLength) {
-                   var left = (pos << 1) + 1;
-                   var right = left + 1;
-                   var best = data[left];
+         function keyup(d3_event) {
+           if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false).classed('hover', true);

 
 

-                   if (right < this.length && compare(data[right], best) < 0) {
-                       left = right;
-                       best = data[right];
-                   }
-                   if (compare(best, item) >= 0) { break; }
+             _selection.classed('hover-disabled', false);

 
 

-                   data[pos] = best;
-                   pos = left;
-               }
+             dispatch.call('hover', this, _targets);
+           }
+         }
+
+         function behavior(selection) {
+           _selection = selection;
+           _targets = [];

 
 

-               data[pos] = item;
+           if (_initialNodeID) {
+             _newNodeId = _initialNodeID;
+             _initialNodeID = null;
+           } else {
+             _newNodeId = null;

            }
            }

-       };
-       tinyqueue.default = _default$1;

 
 

-       var max$2 = Math.max;
-       var min = Math.min;
+           _selection.on(_pointerPrefix + 'over.hover', pointerover).on(_pointerPrefix + 'out.hover', pointerout) // treat pointerdown as pointerover for touch devices
+           .on(_pointerPrefix + 'down.hover', pointerover);

 
 

-       var contourId = 0;
+           select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);

 
 

+           function eventTarget(d3_event) {
+             var datum = d3_event.target && d3_event.target.__data__;
+             if (_typeof(datum) !== 'object') return null;

 
 

-       function processPolygon(contourOrHole, isSubject, depth, Q, bbox, isExteriorRing) {
-         var i, len, s1, s2, e1, e2;
-         for (i = 0, len = contourOrHole.length - 1; i < len; i++) {
-           s1 = contourOrHole[i];
-           s2 = contourOrHole[i + 1];
-           e1 = new SweepEvent(s1, false, undefined, isSubject);
-           e2 = new SweepEvent(s2, false, e1,        isSubject);
-           e1.otherEvent = e2;
+             if (!(datum instanceof osmEntity) && datum.properties && datum.properties.entity instanceof osmEntity) {
+               return datum.properties.entity;
+             }

 
 

-           if (s1[0] === s2[0] && s1[1] === s2[1]) {
-             continue; // skip collapsed edges, or it breaks
+             return datum;

            }
 
            }
 

-           e1.contourId = e2.contourId = depth;
-           if (!isExteriorRing) {
-             e1.isExteriorRing = false;
-             e2.isExteriorRing = false;
-           }
-           if (compareEvents(e1, e2) > 0) {
-             e2.left = true;
-           } else {
-             e1.left = true;
+           function pointerover(d3_event) {
+             // ignore mouse hovers with buttons pressed unless dragging
+             if (context.mode().id.indexOf('drag') === -1 && (!d3_event.pointerType || d3_event.pointerType === 'mouse') && d3_event.buttons) return;
+             var target = eventTarget(d3_event);
+
+             if (target && _targets.indexOf(target) === -1) {
+               _targets.push(target);
+
+               updateHover(d3_event, _targets);
+             }

            }
 
            }
 

-           var x = s1[0], y = s1[1];
-           bbox[0] = min(bbox[0], x);
-           bbox[1] = min(bbox[1], y);
-           bbox[2] = max$2(bbox[2], x);
-           bbox[3] = max$2(bbox[3], y);
+           function pointerout(d3_event) {
+             var target = eventTarget(d3_event);

 
 

-           // Pushing it so the queue is sorted from left to right,
-           // with object on the left having the highest priority.
-           Q.push(e1);
-           Q.push(e2);
-         }
-       }
+             var index = _targets.indexOf(target);

 
 

+             if (index !== -1) {
+               _targets.splice(index);

 
 

-       function fillQueue(subject, clipping, sbbox, cbbox, operation) {
-         var eventQueue = new tinyqueue(null, compareEvents);
-         var polygonSet, isExteriorRing, i, ii, j, jj; //, k, kk;
+               updateHover(d3_event, _targets);
+             }
+           }

 
 

-         for (i = 0, ii = subject.length; i < ii; i++) {
-           polygonSet = subject[i];
-           for (j = 0, jj = polygonSet.length; j < jj; j++) {
-             isExteriorRing = j === 0;
-             if (isExteriorRing) { contourId++; }
-             processPolygon(polygonSet[j], true, contourId, eventQueue, sbbox, isExteriorRing);
+           function allowsVertex(d) {
+             return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());

            }
            }

-         }

 
 

-         for (i = 0, ii = clipping.length; i < ii; i++) {
-           polygonSet = clipping[i];
-           for (j = 0, jj = polygonSet.length; j < jj; j++) {
-             isExteriorRing = j === 0;
-             if (operation === DIFFERENCE) { isExteriorRing = false; }
-             if (isExteriorRing) { contourId++; }
-             processPolygon(polygonSet[j], false, contourId, eventQueue, cbbox, isExteriorRing);
+           function modeAllowsHover(target) {
+             var mode = context.mode();
+
+             if (mode.id === 'add-point') {
+               return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
+             }
+
+             return true;

            }
            }

-         }

 
 

-         return eventQueue;
-       }
+           function updateHover(d3_event, targets) {
+             _selection.selectAll('.hover').classed('hover', false);

 
 

-       var EMPTY = [];
+             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);

 
 

+             var mode = context.mode();

 
 

-       function trivialOperation(subject, clipping, operation) {
-         var result = null;
-         if (subject.length * clipping.length === 0) {
-           if        (operation === INTERSECTION) {
-             result = EMPTY;
-           } else if (operation === DIFFERENCE) {
-             result = subject;
-           } else if (operation === UNION ||
-                      operation === XOR) {
-             result = (subject.length === 0) ? clipping : subject;
-           }
-         }
-         return result;
-       }
+             if (!_newNodeId && (mode.id === 'draw-line' || mode.id === 'draw-area')) {
+               var node = targets.find(function (target) {
+                 return target instanceof osmEntity && target.type === 'node';
+               });
+               _newNodeId = node && node.id;
+             }

 
 

+             targets = targets.filter(function (datum) {
+               if (datum instanceof osmEntity) {
+                 // If drawing a way, don't hover on a node that was just placed. #3974
+                 return datum.id !== _newNodeId && (datum.type !== 'node' || !_ignoreVertex || allowsVertex(datum)) && modeAllowsHover(datum);
+               }

 
 

-       function compareBBoxes(subject, clipping, sbbox, cbbox, operation) {
-         var result = null;
-         if (sbbox[0] > cbbox[2] ||
-             cbbox[0] > sbbox[2] ||
-             sbbox[1] > cbbox[3] ||
-             cbbox[1] > sbbox[3]) {
-           if        (operation === INTERSECTION) {
-             result = EMPTY;
-           } else if (operation === DIFFERENCE) {
-             result = subject;
-           } else if (operation === UNION ||
-                      operation === XOR) {
-             result = subject.concat(clipping);
-           }
-         }
-         return result;
-       }
+               return true;
+             });
+             var selector = '';

 
 

+             for (var i in targets) {
+               var datum = targets[i]; // What are we hovering over?

 
 

-       function boolean(subject, clipping, operation) {
-         if (typeof subject[0][0][0] === 'number') {
-           subject = [subject];
-         }
-         if (typeof clipping[0][0][0] === 'number') {
-           clipping = [clipping];
-         }
-         var trivial = trivialOperation(subject, clipping, operation);
-         if (trivial) {
-           return trivial === EMPTY ? null : trivial;
-         }
-         var sbbox = [Infinity, Infinity, -Infinity, -Infinity];
-         var cbbox = [Infinity, Infinity, -Infinity, -Infinity];
+               if (datum.__featurehash__) {
+                 // hovering custom data
+                 selector += ', .data' + datum.__featurehash__;
+               } else if (datum instanceof QAItem) {
+                 selector += ', .' + datum.service + '.itemId-' + datum.id;
+               } else if (datum instanceof osmNote) {
+                 selector += ', .note-' + datum.id;
+               } else if (datum instanceof osmEntity) {
+                 selector += ', .' + datum.id;

 
 

-         // console.time('fill queue');
-         var eventQueue = fillQueue(subject, clipping, sbbox, cbbox, operation);
-         //console.timeEnd('fill queue');
+                 if (datum.type === 'relation') {
+                   for (var j in datum.members) {
+                     selector += ', .' + datum.members[j].id;
+                   }
+                 }
+               }
+             }

 
 

-         trivial = compareBBoxes(subject, clipping, sbbox, cbbox, operation);
-         if (trivial) {
-           return trivial === EMPTY ? null : trivial;
-         }
-         // console.time('subdivide edges');
-         var sortedEvents = subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation);
-         //console.timeEnd('subdivide edges');
+             var suppressed = _altDisables && d3_event && d3_event.altKey;

 
 

-         // console.time('connect vertices');
-         var contours = connectEdges(sortedEvents);
-         //console.timeEnd('connect vertices');
+             if (selector.trim().length) {
+               // remove the first comma
+               selector = selector.slice(1);

 
 

-         // Convert contours to polygons
-         var polygons = [];
-         for (var i = 0; i < contours.length; i++) {
-           var contour = contours[i];
-           if (contour.isExterior()) {
-             // The exterior ring goes first
-             var rings = [contour.points];
-             // Followed by holes if any
-             for (var j = 0; j < contour.holeIds.length; j++) {
-               var holeId = contour.holeIds[j];
-               rings.push(contours[holeId].points);
+               _selection.selectAll(selector).classed(suppressed ? 'hover-suppressed' : 'hover', true);

              }
              }

-             polygons.push(rings);
+
+             dispatch.call('hover', this, !suppressed && targets);

            }
          }
 
            }
          }
 

-         return polygons;
-       }
+         behavior.off = function (selection) {
+           selection.selectAll('.hover').classed('hover', false);
+           selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
+           selection.classed('hover-disabled', false);
+           selection.on(_pointerPrefix + 'over.hover', null).on(_pointerPrefix + 'out.hover', null).on(_pointerPrefix + 'down.hover', null);
+           select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', null, true).on('keydown.hover', null).on('keyup.hover', null);
+         };
+
+         behavior.altDisables = function (val) {
+           if (!arguments.length) return _altDisables;
+           _altDisables = val;
+           return behavior;
+         };

 
 

-       function union (subject, clipping) {
-         return boolean(subject, clipping, UNION);
+         behavior.ignoreVertex = function (val) {
+           if (!arguments.length) return _ignoreVertex;
+           _ignoreVertex = val;
+           return behavior;
+         };
+
+         behavior.initialNodeID = function (nodeId) {
+           _initialNodeID = nodeId;
+           return behavior;
+         };
+
+         return utilRebind(behavior, dispatch, 'on');

        }
 
        }
 

-       var read$6 = function (buffer, offset, isLE, mLen, nBytes) {
-         var e, m;
-         var eLen = (nBytes * 8) - mLen - 1;
-         var eMax = (1 << eLen) - 1;
-         var eBias = eMax >> 1;
-         var nBits = -7;
-         var i = isLE ? (nBytes - 1) : 0;
-         var d = isLE ? -1 : 1;
-         var s = buffer[offset + i];
+       var _disableSpace = false;
+       var _lastSpace = null;
+       function behaviorDraw(context) {
+         var dispatch = dispatch$8('move', 'down', 'downcancel', 'click', 'clickWay', 'clickNode', 'undo', 'cancel', 'finish');
+         var keybinding = utilKeybinding('draw');

 
 

-         i += d;
+         var _hover = behaviorHover(context).altDisables(true).ignoreVertex(true).on('hover', context.ui().sidebar.hover);

 
 

-         e = s & ((1 << (-nBits)) - 1);
-         s >>= (-nBits);
-         nBits += eLen;
-         for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+         var _edit = behaviorEdit(context);

 
 

-         m = e & ((1 << (-nBits)) - 1);
-         e >>= (-nBits);
-         nBits += mLen;
-         for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+         var _closeTolerance = 4;
+         var _tolerance = 12;
+         var _mouseLeave = false;
+         var _lastMouse = null;

 
 

-         if (e === 0) {
-           e = 1 - eBias;
-         } else if (e === eMax) {
-           return m ? NaN : ((s ? -1 : 1) * Infinity)
-         } else {
-           m = m + Math.pow(2, mLen);
-           e = e - eBias;
-         }
-         return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
-       };
+         var _lastPointerUpEvent;

 
 

-       var write$6 = function (buffer, value, offset, isLE, mLen, nBytes) {
-         var e, m, c;
-         var eLen = (nBytes * 8) - mLen - 1;
-         var eMax = (1 << eLen) - 1;
-         var eBias = eMax >> 1;
-         var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0);
-         var i = isLE ? 0 : (nBytes - 1);
-         var d = isLE ? 1 : -1;
-         var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0;
+         var _downPointer; // use pointer events on supported platforms; fallback to mouse events

 
 

-         value = Math.abs(value);

 
 

-         if (isNaN(value) || value === Infinity) {
-           m = isNaN(value) ? 1 : 0;
-           e = eMax;
-         } else {
-           e = Math.floor(Math.log(value) / Math.LN2);
-           if (value * (c = Math.pow(2, -e)) < 1) {
-             e--;
-             c *= 2;
-           }
-           if (e + eBias >= 1) {
-             value += rt / c;
-           } else {
-             value += rt * Math.pow(2, 1 - eBias);
-           }
-           if (value * c >= 2) {
-             e++;
-             c /= 2;
-           }
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // related code
+         // - `mode/drag_node.js` `datum()`

 
 

-           if (e + eBias >= eMax) {
-             m = 0;
-             e = eMax;
-           } else if (e + eBias >= 1) {
-             m = ((value * c) - 1) * Math.pow(2, mLen);
-             e = e + eBias;
-           } else {
-             m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
-             e = 0;
-           }
-         }

 
 

-         for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
+         function datum(d3_event) {
+           var mode = context.mode();
+           var isNote = mode && mode.id.indexOf('note') !== -1;
+           if (d3_event.altKey || isNote) return {};
+           var element;

 
 

-         e = (e << mLen) | m;
-         eLen += mLen;
-         for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+           if (d3_event.type === 'keydown') {
+             element = _lastMouse && _lastMouse.target;
+           } else {
+             element = d3_event.target;
+           } // When drawing, snap only to touch targets..
+           // (this excludes area fills and active drawing elements)

 
 

-         buffer[offset + i - d] |= s * 128;
-       };

 
 

-       var ieee754 = {
-               read: read$6,
-               write: write$6
-       };
+           var d = element.__data__;
+           return d && d.properties && d.properties.target ? d : {};
+         }

 
 

-       var pbf = Pbf;
+         function pointerdown(d3_event) {
+           if (_downPointer) return;
+           var pointerLocGetter = utilFastMouse(this);
+           _downPointer = {
+             id: d3_event.pointerId || 'mouse',
+             pointerLocGetter: pointerLocGetter,
+             downTime: +new Date(),
+             downLoc: pointerLocGetter(d3_event)
+           };
+           dispatch.call('down', this, d3_event, datum(d3_event));
+         }
+
+         function pointerup(d3_event) {
+           if (!_downPointer || _downPointer.id !== (d3_event.pointerId || 'mouse')) return;
+           var downPointer = _downPointer;
+           _downPointer = null;
+           _lastPointerUpEvent = d3_event;
+           if (downPointer.isCancelled) return;
+           var t2 = +new Date();
+           var p2 = downPointer.pointerLocGetter(d3_event);
+           var dist = geoVecLength(downPointer.downLoc, p2);

 
 

+           if (dist < _closeTolerance || dist < _tolerance && t2 - downPointer.downTime < 500) {
+             // Prevent a quick second click
+             select(window).on('click.draw-block', function () {
+               d3_event.stopPropagation();
+             }, true);
+             context.map().dblclickZoomEnable(false);
+             window.setTimeout(function () {
+               context.map().dblclickZoomEnable(true);
+               select(window).on('click.draw-block', null);
+             }, 500);
+             click(d3_event, p2);
+           }
+         }

 
 

+         function pointermove(d3_event) {
+           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
+             var p2 = _downPointer.pointerLocGetter(d3_event);

 
 

-       function Pbf(buf) {
-           this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);
-           this.pos = 0;
-           this.type = 0;
-           this.length = this.buf.length;
-       }
+             var dist = geoVecLength(_downPointer.downLoc, p2);

 
 

-       Pbf.Varint  = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
-       Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
-       Pbf.Bytes   = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
-       Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
+             if (dist >= _closeTolerance) {
+               _downPointer.isCancelled = true;
+               dispatch.call('downcancel', this);
+             }
+           }

 
 

-       var SHIFT_LEFT_32 = (1 << 16) * (1 << 16),
-           SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32;
+           if (d3_event.pointerType && d3_event.pointerType !== 'mouse' || d3_event.buttons || _downPointer) return; // HACK: Mobile Safari likes to send one or more `mouse` type pointermove
+           // events immediately after non-mouse pointerup events; detect and ignore them.

 
 

-       // Threshold chosen based on both benchmarking and knowledge about browser string
-       // data structures (which currently switch structure types at 12 bytes or more)
-       var TEXT_DECODER_MIN_LENGTH = 12;
-       var utf8TextDecoder = typeof TextDecoder === 'undefined' ? null : new TextDecoder('utf8');
+           if (_lastPointerUpEvent && _lastPointerUpEvent.pointerType !== 'mouse' && d3_event.timeStamp - _lastPointerUpEvent.timeStamp < 100) return;
+           _lastMouse = d3_event;
+           dispatch.call('move', this, d3_event, datum(d3_event));
+         }

 
 

-       Pbf.prototype = {
+         function pointercancel(d3_event) {
+           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse')) {
+             if (!_downPointer.isCancelled) {
+               dispatch.call('downcancel', this);
+             }

 
 

-           destroy: function() {
-               this.buf = null;
-           },
+             _downPointer = null;
+           }
+         }

 
 

-           // === READING =================================================================
+         function mouseenter() {
+           _mouseLeave = false;
+         }

 
 

-           readFields: function(readField, result, end) {
-               end = end || this.length;
+         function mouseleave() {
+           _mouseLeave = true;
+         }

 
 

-               while (this.pos < end) {
-                   var val = this.readVarint(),
-                       tag = val >> 3,
-                       startPos = this.pos;
+         function allowsVertex(d) {
+           return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+         } // related code
+         // - `mode/drag_node.js`     `doMove()`
+         // - `behavior/draw.js`      `click()`
+         // - `behavior/draw_way.js`  `move()`

 
 

-                   this.type = val & 0x7;
-                   readField(tag, result, this);

 
 

-                   if (this.pos === startPos) { this.skip(val); }
-               }
-               return result;
-           },
+         function click(d3_event, loc) {
+           var d = datum(d3_event);
+           var target = d && d.properties && d.properties.entity;
+           var mode = context.mode();

 
 

-           readMessage: function(readField, result) {
-               return this.readFields(readField, result, this.readVarint() + this.pos);
-           },
+           if (target && target.type === 'node' && allowsVertex(target)) {
+             // Snap to a node
+             dispatch.call('clickNode', this, target, d);
+             return;
+           } else if (target && target.type === 'way' && (mode.id !== 'add-point' || mode.preset.matchGeometry('vertex'))) {
+             // Snap to a way
+             var choice = geoChooseEdge(context.graph().childNodes(target), loc, context.projection, context.activeID());

 
 

-           readFixed32: function() {
-               var val = readUInt32(this.buf, this.pos);
-               this.pos += 4;
-               return val;
-           },
+             if (choice) {
+               var edge = [target.nodes[choice.index - 1], target.nodes[choice.index]];
+               dispatch.call('clickWay', this, choice.loc, edge, d);
+               return;
+             }
+           } else if (mode.id !== 'add-point' || mode.preset.matchGeometry('point')) {
+             var locLatLng = context.projection.invert(loc);
+             dispatch.call('click', this, locLatLng, d);
+           }
+         } // treat a spacebar press like a click

 
 

-           readSFixed32: function() {
-               var val = readInt32(this.buf, this.pos);
-               this.pos += 4;
-               return val;
-           },

 
 

-           // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)
+         function space(d3_event) {
+           d3_event.preventDefault();
+           d3_event.stopPropagation();
+           var currSpace = context.map().mouse();

 
 

-           readFixed64: function() {
-               var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
-               this.pos += 8;
-               return val;
-           },
+           if (_disableSpace && _lastSpace) {
+             var dist = geoVecLength(_lastSpace, currSpace);

 
 

-           readSFixed64: function() {
-               var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
-               this.pos += 8;
-               return val;
-           },
+             if (dist > _tolerance) {
+               _disableSpace = false;
+             }
+           }

 
 

-           readFloat: function() {
-               var val = ieee754.read(this.buf, this.pos, true, 23, 4);
-               this.pos += 4;
-               return val;
-           },
+           if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click

 
 

-           readDouble: function() {
-               var val = ieee754.read(this.buf, this.pos, true, 52, 8);
-               this.pos += 8;
-               return val;
-           },
+           _lastSpace = currSpace;
+           _disableSpace = true;
+           select(window).on('keyup.space-block', function () {
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+             _disableSpace = false;
+             select(window).on('keyup.space-block', null);
+           }); // get the current mouse position

 
 

-           readVarint: function(isSigned) {
-               var buf = this.buf,
-                   val, b;
+           var loc = context.map().mouse() || // or the map center if the mouse has never entered the map
+           context.projection(context.map().center());
+           click(d3_event, loc);
+         }

 
 

-               b = buf[this.pos++]; val  =  b & 0x7f;        if (b < 0x80) { return val; }
-               b = buf[this.pos++]; val |= (b & 0x7f) << 7;  if (b < 0x80) { return val; }
-               b = buf[this.pos++]; val |= (b & 0x7f) << 14; if (b < 0x80) { return val; }
-               b = buf[this.pos++]; val |= (b & 0x7f) << 21; if (b < 0x80) { return val; }
-               b = buf[this.pos];   val |= (b & 0x0f) << 28;
+         function backspace(d3_event) {
+           d3_event.preventDefault();
+           dispatch.call('undo');
+         }

 
 

-               return readVarintRemainder(val, isSigned, this);
-           },
+         function del(d3_event) {
+           d3_event.preventDefault();
+           dispatch.call('cancel');
+         }

 
 

-           readVarint64: function() { // for compatibility with v2.0.1
-               return this.readVarint(true);
-           },
+         function ret(d3_event) {
+           d3_event.preventDefault();
+           dispatch.call('finish');
+         }

 
 

-           readSVarint: function() {
-               var num = this.readVarint();
-               return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
-           },
+         function behavior(selection) {
+           context.install(_hover);
+           context.install(_edit);
+           _downPointer = null;
+           keybinding.on('⌫', backspace).on('⌦', del).on('⎋', ret).on('↩', ret).on('space', space).on('⌥space', space);
+           selection.on('mouseenter.draw', mouseenter).on('mouseleave.draw', mouseleave).on(_pointerPrefix + 'down.draw', pointerdown).on(_pointerPrefix + 'move.draw', pointermove);
+           select(window).on(_pointerPrefix + 'up.draw', pointerup, true).on('pointercancel.draw', pointercancel, true);
+           select(document).call(keybinding);
+           return behavior;
+         }

 
 

-           readBoolean: function() {
-               return Boolean(this.readVarint());
-           },
+         behavior.off = function (selection) {
+           context.ui().sidebar.hover.cancel();
+           context.uninstall(_hover);
+           context.uninstall(_edit);
+           selection.on('mouseenter.draw', null).on('mouseleave.draw', null).on(_pointerPrefix + 'down.draw', null).on(_pointerPrefix + 'move.draw', null);
+           select(window).on(_pointerPrefix + 'up.draw', null).on('pointercancel.draw', null); // note: keyup.space-block, click.draw-block should remain

 
 

-           readString: function() {
-               var end = this.readVarint() + this.pos;
-               var pos = this.pos;
-               this.pos = end;
+           select(document).call(keybinding.unbind);
+         };

 
 

-               if (end - pos >= TEXT_DECODER_MIN_LENGTH && utf8TextDecoder) {
-                   // longer strings are fast with the built-in browser TextDecoder API
-                   return readUtf8TextDecoder(this.buf, pos, end);
-               }
-               // short strings are fast with our custom implementation
-               return readUtf8(this.buf, pos, end);
-           },
+         behavior.hover = function () {
+           return _hover;
+         };

 
 

-           readBytes: function() {
-               var end = this.readVarint() + this.pos,
-                   buffer = this.buf.subarray(this.pos, end);
-               this.pos = end;
-               return buffer;
-           },
+         return utilRebind(behavior, dispatch, 'on');
+       }

 
 

-           // verbose for performance reasons; doesn't affect gzipped size
+       function initRange(domain, range) {
+         switch (arguments.length) {
+           case 0:
+             break;

 
 

-           readPackedVarint: function(arr, isSigned) {
-               if (this.type !== Pbf.Bytes) { return arr.push(this.readVarint(isSigned)); }
-               var end = readPackedEnd(this);
-               arr = arr || [];
-               while (this.pos < end) { arr.push(this.readVarint(isSigned)); }
-               return arr;
-           },
-           readPackedSVarint: function(arr) {
-               if (this.type !== Pbf.Bytes) { return arr.push(this.readSVarint()); }
-               var end = readPackedEnd(this);
-               arr = arr || [];
-               while (this.pos < end) { arr.push(this.readSVarint()); }
-               return arr;
-           },
-           readPackedBoolean: function(arr) {
-               if (this.type !== Pbf.Bytes) { return arr.push(this.readBoolean()); }
-               var end = readPackedEnd(this);
-               arr = arr || [];
-               while (this.pos < end) { arr.push(this.readBoolean()); }
-               return arr;
-           },
-           readPackedFloat: function(arr) {
-               if (this.type !== Pbf.Bytes) { return arr.push(this.readFloat()); }
-               var end = readPackedEnd(this);
-               arr = arr || [];
-               while (this.pos < end) { arr.push(this.readFloat()); }
-               return arr;
-           },
-           readPackedDouble: function(arr) {
-               if (this.type !== Pbf.Bytes) { return arr.push(this.readDouble()); }
-               var end = readPackedEnd(this);
-               arr = arr || [];
-               while (this.pos < end) { arr.push(this.readDouble()); }
-               return arr;
-           },
-           readPackedFixed32: function(arr) {
-               if (this.type !== Pbf.Bytes) { return arr.push(this.readFixed32()); }
-               var end = readPackedEnd(this);
-               arr = arr || [];
-               while (this.pos < end) { arr.push(this.readFixed32()); }
-               return arr;
-           },
-           readPackedSFixed32: function(arr) {
-               if (this.type !== Pbf.Bytes) { return arr.push(this.readSFixed32()); }
-               var end = readPackedEnd(this);
-               arr = arr || [];
-               while (this.pos < end) { arr.push(this.readSFixed32()); }
-               return arr;
-           },
-           readPackedFixed64: function(arr) {
-               if (this.type !== Pbf.Bytes) { return arr.push(this.readFixed64()); }
-               var end = readPackedEnd(this);
-               arr = arr || [];
-               while (this.pos < end) { arr.push(this.readFixed64()); }
-               return arr;
-           },
-           readPackedSFixed64: function(arr) {
-               if (this.type !== Pbf.Bytes) { return arr.push(this.readSFixed64()); }
-               var end = readPackedEnd(this);
-               arr = arr || [];
-               while (this.pos < end) { arr.push(this.readSFixed64()); }
-               return arr;
-           },
+           case 1:
+             this.range(domain);
+             break;

 
 

-           skip: function(val) {
-               var type = val & 0x7;
-               if (type === Pbf.Varint) { while (this.buf[this.pos++] > 0x7f) {} }
-               else if (type === Pbf.Bytes) { this.pos = this.readVarint() + this.pos; }
-               else if (type === Pbf.Fixed32) { this.pos += 4; }
-               else if (type === Pbf.Fixed64) { this.pos += 8; }
-               else { throw new Error('Unimplemented type: ' + type); }
-           },
+           default:
+             this.range(range).domain(domain);
+             break;
+         }

 
 

-           // === WRITING =================================================================
+         return this;
+       }

 
 

-           writeTag: function(tag, type) {
-               this.writeVarint((tag << 3) | type);
-           },
+       function constants(x) {
+         return function () {
+           return x;
+         };
+       }

 
 

-           realloc: function(min) {
-               var length = this.length || 16;
+       function number(x) {
+         return +x;
+       }

 
 

-               while (length < this.pos + min) { length *= 2; }
+       var unit = [0, 1];
+       function identity$1(x) {
+         return x;
+       }

 
 

-               if (length !== this.length) {
-                   var buf = new Uint8Array(length);
-                   buf.set(this.buf);
-                   this.buf = buf;
-                   this.length = length;
-               }
-           },
+       function normalize(a, b) {
+         return (b -= a = +a) ? function (x) {
+           return (x - a) / b;
+         } : constants(isNaN(b) ? NaN : 0.5);
+       }

 
 

-           finish: function() {
-               this.length = this.pos;
-               this.pos = 0;
-               return this.buf.subarray(0, this.length);
-           },
+       function clamper(a, b) {
+         var t;
+         if (a > b) t = a, a = b, b = t;
+         return function (x) {
+           return Math.max(a, Math.min(b, x));
+         };
+       } // normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
+       // interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].

 
 

-           writeFixed32: function(val) {
-               this.realloc(4);
-               writeInt32(this.buf, val, this.pos);
-               this.pos += 4;
-           },

 
 

-           writeSFixed32: function(val) {
-               this.realloc(4);
-               writeInt32(this.buf, val, this.pos);
-               this.pos += 4;
-           },
+       function bimap(domain, range, interpolate) {
+         var d0 = domain[0],
+             d1 = domain[1],
+             r0 = range[0],
+             r1 = range[1];
+         if (d1 < d0) d0 = normalize(d1, d0), r0 = interpolate(r1, r0);else d0 = normalize(d0, d1), r0 = interpolate(r0, r1);
+         return function (x) {
+           return r0(d0(x));
+         };
+       }

 
 

-           writeFixed64: function(val) {
-               this.realloc(8);
-               writeInt32(this.buf, val & -1, this.pos);
-               writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
-               this.pos += 8;
-           },
+       function polymap(domain, range, interpolate) {
+         var j = Math.min(domain.length, range.length) - 1,
+             d = new Array(j),
+             r = new Array(j),
+             i = -1; // Reverse descending domains.

 
 

-           writeSFixed64: function(val) {
-               this.realloc(8);
-               writeInt32(this.buf, val & -1, this.pos);
-               writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
-               this.pos += 8;
-           },
+         if (domain[j] < domain[0]) {
+           domain = domain.slice().reverse();
+           range = range.slice().reverse();
+         }

 
 

-           writeVarint: function(val) {
-               val = +val || 0;
+         while (++i < j) {
+           d[i] = normalize(domain[i], domain[i + 1]);
+           r[i] = interpolate(range[i], range[i + 1]);
+         }

 
 

-               if (val > 0xfffffff || val < 0) {
-                   writeBigVarint(val, this);
-                   return;
-               }
+         return function (x) {
+           var i = bisectRight(domain, x, 1, j) - 1;
+           return r[i](d[i](x));
+         };
+       }

 
 

-               this.realloc(4);
+       function copy(source, target) {
+         return target.domain(source.domain()).range(source.range()).interpolate(source.interpolate()).clamp(source.clamp()).unknown(source.unknown());
+       }
+       function transformer() {
+         var domain = unit,
+             range = unit,
+             interpolate = interpolate$1,
+             transform,
+             untransform,
+             unknown,
+             clamp = identity$1,
+             piecewise,
+             output,
+             input;

 
 

-               this.buf[this.pos++] =           val & 0x7f  | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) { return; }
-               this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) { return; }
-               this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) { return; }
-               this.buf[this.pos++] =   (val >>> 7) & 0x7f;
-           },
+         function rescale() {
+           var n = Math.min(domain.length, range.length);
+           if (clamp !== identity$1) clamp = clamper(domain[0], domain[n - 1]);
+           piecewise = n > 2 ? polymap : bimap;
+           output = input = null;
+           return scale;
+         }

 
 

-           writeSVarint: function(val) {
-               this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);
-           },
+         function scale(x) {
+           return x == null || isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));
+         }

 
 

-           writeBoolean: function(val) {
-               this.writeVarint(Boolean(val));
-           },
+         scale.invert = function (y) {
+           return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
+         };

 
 

-           writeString: function(str) {
-               str = String(str);
-               this.realloc(str.length * 4);
+         scale.domain = function (_) {
+           return arguments.length ? (domain = Array.from(_, number), rescale()) : domain.slice();
+         };

 
 

-               this.pos++; // reserve 1 byte for short string length
+         scale.range = function (_) {
+           return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
+         };

 
 

-               var startPos = this.pos;
-               // write the string directly to the buffer and see how much was written
-               this.pos = writeUtf8(this.buf, str, this.pos);
-               var len = this.pos - startPos;
+         scale.rangeRound = function (_) {
+           return range = Array.from(_), interpolate = interpolateRound, rescale();
+         };

 
 

-               if (len >= 0x80) { makeRoomForExtraLength(startPos, len, this); }
+         scale.clamp = function (_) {
+           return arguments.length ? (clamp = _ ? true : identity$1, rescale()) : clamp !== identity$1;
+         };

 
 

-               // finally, write the message length in the reserved place and restore the position
-               this.pos = startPos - 1;
-               this.writeVarint(len);
-               this.pos += len;
-           },
+         scale.interpolate = function (_) {
+           return arguments.length ? (interpolate = _, rescale()) : interpolate;
+         };

 
 

-           writeFloat: function(val) {
-               this.realloc(4);
-               ieee754.write(this.buf, val, this.pos, true, 23, 4);
-               this.pos += 4;
-           },
+         scale.unknown = function (_) {
+           return arguments.length ? (unknown = _, scale) : unknown;
+         };

 
 

-           writeDouble: function(val) {
-               this.realloc(8);
-               ieee754.write(this.buf, val, this.pos, true, 52, 8);
-               this.pos += 8;
-           },
+         return function (t, u) {
+           transform = t, untransform = u;
+           return rescale();
+         };
+       }
+       function continuous() {
+         return transformer()(identity$1, identity$1);
+       }

 
 

-           writeBytes: function(buffer) {
-               var len = buffer.length;
-               this.writeVarint(len);
-               this.realloc(len);
-               for (var i = 0; i < len; i++) { this.buf[this.pos++] = buffer[i]; }
-           },
+       function formatDecimal (x) {
+         return Math.abs(x = Math.round(x)) >= 1e21 ? x.toLocaleString("en").replace(/,/g, "") : x.toString(10);
+       } // Computes the decimal coefficient and exponent of the specified number x with
+       // significant digits p, where x is positive and p is in [1, 21] or undefined.
+       // For example, formatDecimalParts(1.23) returns ["123", 0].

 
 

-           writeRawMessage: function(fn, obj) {
-               this.pos++; // reserve 1 byte for short message length
+       function formatDecimalParts(x, p) {
+         if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity

 
 

-               // write the message directly to the buffer and see how much was written
-               var startPos = this.pos;
-               fn(obj, this);
-               var len = this.pos - startPos;
+         var i,
+             coefficient = x.slice(0, i); // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
+         // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).

 
 

-               if (len >= 0x80) { makeRoomForExtraLength(startPos, len, this); }
+         return [coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)];
+       }

 
 

-               // finally, write the message length in the reserved place and restore the position
-               this.pos = startPos - 1;
-               this.writeVarint(len);
-               this.pos += len;
-           },
+       function exponent (x) {
+         return x = formatDecimalParts(Math.abs(x)), x ? x[1] : NaN;
+       }

 
 

-           writeMessage: function(tag, fn, obj) {
-               this.writeTag(tag, Pbf.Bytes);
-               this.writeRawMessage(fn, obj);
-           },
+       function formatGroup (grouping, thousands) {
+         return function (value, width) {
+           var i = value.length,
+               t = [],
+               j = 0,
+               g = grouping[0],
+               length = 0;

 
 

-           writePackedVarint:   function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedVarint, arr); }   },
-           writePackedSVarint:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedSVarint, arr); }  },
-           writePackedBoolean:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedBoolean, arr); }  },
-           writePackedFloat:    function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedFloat, arr); }    },
-           writePackedDouble:   function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedDouble, arr); }   },
-           writePackedFixed32:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedFixed32, arr); }  },
-           writePackedSFixed32: function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedSFixed32, arr); } },
-           writePackedFixed64:  function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedFixed64, arr); }  },
-           writePackedSFixed64: function(tag, arr) { if (arr.length) { this.writeMessage(tag, writePackedSFixed64, arr); } },
-
-           writeBytesField: function(tag, buffer) {
-               this.writeTag(tag, Pbf.Bytes);
-               this.writeBytes(buffer);
-           },
-           writeFixed32Field: function(tag, val) {
-               this.writeTag(tag, Pbf.Fixed32);
-               this.writeFixed32(val);
-           },
-           writeSFixed32Field: function(tag, val) {
-               this.writeTag(tag, Pbf.Fixed32);
-               this.writeSFixed32(val);
-           },
-           writeFixed64Field: function(tag, val) {
-               this.writeTag(tag, Pbf.Fixed64);
-               this.writeFixed64(val);
-           },
-           writeSFixed64Field: function(tag, val) {
-               this.writeTag(tag, Pbf.Fixed64);
-               this.writeSFixed64(val);
-           },
-           writeVarintField: function(tag, val) {
-               this.writeTag(tag, Pbf.Varint);
-               this.writeVarint(val);
-           },
-           writeSVarintField: function(tag, val) {
-               this.writeTag(tag, Pbf.Varint);
-               this.writeSVarint(val);
-           },
-           writeStringField: function(tag, str) {
-               this.writeTag(tag, Pbf.Bytes);
-               this.writeString(str);
-           },
-           writeFloatField: function(tag, val) {
-               this.writeTag(tag, Pbf.Fixed32);
-               this.writeFloat(val);
-           },
-           writeDoubleField: function(tag, val) {
-               this.writeTag(tag, Pbf.Fixed64);
-               this.writeDouble(val);
-           },
-           writeBooleanField: function(tag, val) {
-               this.writeVarintField(tag, Boolean(val));
+           while (i > 0 && g > 0) {
+             if (length + g + 1 > width) g = Math.max(1, width - length);
+             t.push(value.substring(i -= g, i + g));
+             if ((length += g + 1) > width) break;
+             g = grouping[j = (j + 1) % grouping.length];

            }
            }

-       };

 
 

-       function readVarintRemainder(l, s, p) {
-           var buf = p.buf,
-               h, b;
+           return t.reverse().join(thousands);
+         };
+       }

 
 

-           b = buf[p.pos++]; h  = (b & 0x70) >> 4;  if (b < 0x80) { return toNum(l, h, s); }
-           b = buf[p.pos++]; h |= (b & 0x7f) << 3;  if (b < 0x80) { return toNum(l, h, s); }
-           b = buf[p.pos++]; h |= (b & 0x7f) << 10; if (b < 0x80) { return toNum(l, h, s); }
-           b = buf[p.pos++]; h |= (b & 0x7f) << 17; if (b < 0x80) { return toNum(l, h, s); }
-           b = buf[p.pos++]; h |= (b & 0x7f) << 24; if (b < 0x80) { return toNum(l, h, s); }
-           b = buf[p.pos++]; h |= (b & 0x01) << 31; if (b < 0x80) { return toNum(l, h, s); }
+       function formatNumerals (numerals) {
+         return function (value) {
+           return value.replace(/[0-9]/g, function (i) {
+             return numerals[+i];
+           });
+         };
+       }

 
 

-           throw new Error('Expected varint not more than 10 bytes');
+       // [[fill]align][sign][symbol][0][width][,][.precision][~][type]
+       var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
+       function formatSpecifier(specifier) {
+         if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
+         var match;
+         return new FormatSpecifier({
+           fill: match[1],
+           align: match[2],
+           sign: match[3],
+           symbol: match[4],
+           zero: match[5],
+           width: match[6],
+           comma: match[7],
+           precision: match[8] && match[8].slice(1),
+           trim: match[9],
+           type: match[10]
+         });

        }
        }

+       formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof

 
 

-       function readPackedEnd(pbf) {
-           return pbf.type === Pbf.Bytes ?
-               pbf.readVarint() + pbf.pos : pbf.pos + 1;
+       function FormatSpecifier(specifier) {
+         this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
+         this.align = specifier.align === undefined ? ">" : specifier.align + "";
+         this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
+         this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
+         this.zero = !!specifier.zero;
+         this.width = specifier.width === undefined ? undefined : +specifier.width;
+         this.comma = !!specifier.comma;
+         this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
+         this.trim = !!specifier.trim;
+         this.type = specifier.type === undefined ? "" : specifier.type + "";

        }
 
        }
 

-       function toNum(low, high, isSigned) {
-           if (isSigned) {
-               return high * 0x100000000 + (low >>> 0);
+       FormatSpecifier.prototype.toString = function () {
+         return this.fill + this.align + this.sign + this.symbol + (this.zero ? "0" : "") + (this.width === undefined ? "" : Math.max(1, this.width | 0)) + (this.comma ? "," : "") + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0)) + (this.trim ? "~" : "") + this.type;
+       };
+
+       // Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
+       function formatTrim (s) {
+         out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
+           switch (s[i]) {
+             case ".":
+               i0 = i1 = i;
+               break;
+
+             case "0":
+               if (i0 === 0) i0 = i;
+               i1 = i;
+               break;
+
+             default:
+               if (!+s[i]) break out;
+               if (i0 > 0) i0 = 0;
+               break;

            }
            }

+         }

 
 

-           return ((high >>> 0) * 0x100000000) + (low >>> 0);
+         return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;

        }
 
        }
 

-       function writeBigVarint(val, pbf) {
-           var low, high;
-
-           if (val >= 0) {
-               low  = (val % 0x100000000) | 0;
-               high = (val / 0x100000000) | 0;
-           } else {
-               low  = ~(-val % 0x100000000);
-               high = ~(-val / 0x100000000);
+       var $$7 = _export;
+       var fails$3 = fails$N;
+       var thisNumberValue = thisNumberValue$2;

 
 

-               if (low ^ 0xffffffff) {
-                   low = (low + 1) | 0;
-               } else {
-                   low = 0;
-                   high = (high + 1) | 0;
-               }
-           }
+       var nativeToPrecision = 1.0.toPrecision;

 
 

-           if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
-               throw new Error('Given varint doesn\'t fit into 10 bytes');
-           }
+       var FORCED$1 = fails$3(function () {
+         // IE7-
+         return nativeToPrecision.call(1, undefined) !== '1';
+       }) || !fails$3(function () {
+         // V8 ~ Android 4.3-
+         nativeToPrecision.call({});
+       });

 
 

-           pbf.realloc(10);
+       // `Number.prototype.toPrecision` method
+       // https://tc39.es/ecma262/#sec-number.prototype.toprecision
+       $$7({ target: 'Number', proto: true, forced: FORCED$1 }, {
+         toPrecision: function toPrecision(precision) {
+           return precision === undefined
+             ? nativeToPrecision.call(thisNumberValue(this))
+             : nativeToPrecision.call(thisNumberValue(this), precision);
+         }
+       });

 
 

-           writeBigVarintLow(low, high, pbf);
-           writeBigVarintHigh(high, pbf);
+       var prefixExponent;
+       function formatPrefixAuto (x, p) {
+         var d = formatDecimalParts(x, p);
+         if (!d) return x + "";
+         var coefficient = d[0],
+             exponent = d[1],
+             i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
+             n = coefficient.length;
+         return i === n ? coefficient : i > n ? coefficient + new Array(i - n + 1).join("0") : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i) : "0." + new Array(1 - i).join("0") + formatDecimalParts(x, Math.max(0, p + i - 1))[0]; // less than 1y!

        }
 
        }
 

-       function writeBigVarintLow(low, high, pbf) {
-           pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-           pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-           pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-           pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;
-           pbf.buf[pbf.pos]   = low & 0x7f;
+       function formatRounded (x, p) {
+         var d = formatDecimalParts(x, p);
+         if (!d) return x + "";
+         var coefficient = d[0],
+             exponent = d[1];
+         return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1) : coefficient + new Array(exponent - coefficient.length + 2).join("0");

        }
 
        }
 

-       function writeBigVarintHigh(high, pbf) {
-           var lsb = (high & 0x07) << 4;
+       var formatTypes = {
+         "%": function _(x, p) {
+           return (x * 100).toFixed(p);
+         },
+         "b": function b(x) {
+           return Math.round(x).toString(2);
+         },
+         "c": function c(x) {
+           return x + "";
+         },
+         "d": formatDecimal,
+         "e": function e(x, p) {
+           return x.toExponential(p);
+         },
+         "f": function f(x, p) {
+           return x.toFixed(p);
+         },
+         "g": function g(x, p) {
+           return x.toPrecision(p);
+         },
+         "o": function o(x) {
+           return Math.round(x).toString(8);
+         },
+         "p": function p(x, _p) {
+           return formatRounded(x * 100, _p);
+         },
+         "r": formatRounded,
+         "s": formatPrefixAuto,
+         "X": function X(x) {
+           return Math.round(x).toString(16).toUpperCase();
+         },
+         "x": function x(_x) {
+           return Math.round(_x).toString(16);
+         }
+       };

 
 

-           pbf.buf[pbf.pos++] |= lsb         | ((high >>>= 3) ? 0x80 : 0); if (!high) { return; }
-           pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-           pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-           pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-           pbf.buf[pbf.pos++]  = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) { return; }
-           pbf.buf[pbf.pos++]  = high & 0x7f;
+       function identity (x) {
+         return x;

        }
 
        }
 

-       function makeRoomForExtraLength(startPos, len, pbf) {
-           var extraLen =
-               len <= 0x3fff ? 1 :
-               len <= 0x1fffff ? 2 :
-               len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7));
+       var map$1 = Array.prototype.map,
+           prefixes = ["y", "z", "a", "f", "p", "n", "µ", "m", "", "k", "M", "G", "T", "P", "E", "Z", "Y"];
+       function formatLocale (locale) {
+         var group = locale.grouping === undefined || locale.thousands === undefined ? identity : formatGroup(map$1.call(locale.grouping, Number), locale.thousands + ""),
+             currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
+             currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
+             decimal = locale.decimal === undefined ? "." : locale.decimal + "",
+             numerals = locale.numerals === undefined ? identity : formatNumerals(map$1.call(locale.numerals, String)),
+             percent = locale.percent === undefined ? "%" : locale.percent + "",
+             minus = locale.minus === undefined ? "−" : locale.minus + "",
+             nan = locale.nan === undefined ? "NaN" : locale.nan + "";

 
 

-           // if 1 byte isn't enough for encoding message length, shift the data to the right
-           pbf.realloc(extraLen);
-           for (var i = pbf.pos - 1; i >= startPos; i--) { pbf.buf[i + extraLen] = pbf.buf[i]; }
-       }
+         function newFormat(specifier) {
+           specifier = formatSpecifier(specifier);
+           var fill = specifier.fill,
+               align = specifier.align,
+               sign = specifier.sign,
+               symbol = specifier.symbol,
+               zero = specifier.zero,
+               width = specifier.width,
+               comma = specifier.comma,
+               precision = specifier.precision,
+               trim = specifier.trim,
+               type = specifier.type; // The "n" type is an alias for ",g".

 
 

-       function writePackedVarint(arr, pbf)   { for (var i = 0; i < arr.length; i++) { pbf.writeVarint(arr[i]); }   }
-       function writePackedSVarint(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeSVarint(arr[i]); }  }
-       function writePackedFloat(arr, pbf)    { for (var i = 0; i < arr.length; i++) { pbf.writeFloat(arr[i]); }    }
-       function writePackedDouble(arr, pbf)   { for (var i = 0; i < arr.length; i++) { pbf.writeDouble(arr[i]); }   }
-       function writePackedBoolean(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeBoolean(arr[i]); }  }
-       function writePackedFixed32(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeFixed32(arr[i]); }  }
-       function writePackedSFixed32(arr, pbf) { for (var i = 0; i < arr.length; i++) { pbf.writeSFixed32(arr[i]); } }
-       function writePackedFixed64(arr, pbf)  { for (var i = 0; i < arr.length; i++) { pbf.writeFixed64(arr[i]); }  }
-       function writePackedSFixed64(arr, pbf) { for (var i = 0; i < arr.length; i++) { pbf.writeSFixed64(arr[i]); } }
+           if (type === "n") comma = true, type = "g"; // The "" type, and any invalid type, is an alias for ".12~g".
+           else if (!formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = "g"; // If zero fill is specified, padding goes after sign and before digits.

 
 

-       // Buffer code below from https://github.com/feross/buffer, MIT-licensed
+           if (zero || fill === "0" && align === "=") zero = true, fill = "0", align = "="; // Compute the prefix and suffix.
+           // For SI-prefix, the suffix is lazily computed.

 
 

-       function readUInt32(buf, pos) {
-           return ((buf[pos]) |
-               (buf[pos + 1] << 8) |
-               (buf[pos + 2] << 16)) +
-               (buf[pos + 3] * 0x1000000);
-       }
+           var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
+               suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : ""; // What format function should we use?
+           // Is this an integer type?
+           // Can this type generate exponential notation?

 
 

-       function writeInt32(buf, val, pos) {
-           buf[pos] = val;
-           buf[pos + 1] = (val >>> 8);
-           buf[pos + 2] = (val >>> 16);
-           buf[pos + 3] = (val >>> 24);
-       }
+           var formatType = formatTypes[type],
+               maybeSuffix = /[defgprs%]/.test(type); // Set the default precision if not specified,
+           // or clamp the specified precision to the supported range.
+           // For significant precision, it must be in [1, 21].
+           // For fixed precision, it must be in [0, 20].

 
 

-       function readInt32(buf, pos) {
-           return ((buf[pos]) |
-               (buf[pos + 1] << 8) |
-               (buf[pos + 2] << 16)) +
-               (buf[pos + 3] << 24);
-       }
+           precision = precision === undefined ? 6 : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) : Math.max(0, Math.min(20, precision));

 
 

-       function readUtf8(buf, pos, end) {
-           var str = '';
-           var i = pos;
+           function format(value) {
+             var valuePrefix = prefix,
+                 valueSuffix = suffix,
+                 i,
+                 n,
+                 c;

 
 

-           while (i < end) {
-               var b0 = buf[i];
-               var c = null; // codepoint
-               var bytesPerSequence =
-                   b0 > 0xEF ? 4 :
-                   b0 > 0xDF ? 3 :
-                   b0 > 0xBF ? 2 : 1;
+             if (type === "c") {
+               valueSuffix = formatType(value) + valueSuffix;
+               value = "";
+             } else {
+               value = +value; // Determine the sign. -0 is not less than 0, but 1 / -0 is!

 
 

-               if (i + bytesPerSequence > end) { break; }
+               var valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.

 
 

-               var b1, b2, b3;
+               value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.

 
 

-               if (bytesPerSequence === 1) {
-                   if (b0 < 0x80) {
-                       c = b0;
-                   }
-               } else if (bytesPerSequence === 2) {
-                   b1 = buf[i + 1];
-                   if ((b1 & 0xC0) === 0x80) {
-                       c = (b0 & 0x1F) << 0x6 | (b1 & 0x3F);
-                       if (c <= 0x7F) {
-                           c = null;
-                       }
-                   }
-               } else if (bytesPerSequence === 3) {
-                   b1 = buf[i + 1];
-                   b2 = buf[i + 2];
-                   if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
-                       c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | (b2 & 0x3F);
-                       if (c <= 0x7FF || (c >= 0xD800 && c <= 0xDFFF)) {
-                           c = null;
-                       }
-                   }
-               } else if (bytesPerSequence === 4) {
-                   b1 = buf[i + 1];
-                   b2 = buf[i + 2];
-                   b3 = buf[i + 3];
-                   if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
-                       c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | (b3 & 0x3F);
-                       if (c <= 0xFFFF || c >= 0x110000) {
-                           c = null;
-                       }
+               if (trim) value = formatTrim(value); // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
+
+               if (valueNegative && +value === 0 && sign !== "+") valueNegative = false; // Compute the prefix and suffix.
+
+               valuePrefix = (valueNegative ? sign === "(" ? sign : minus : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
+               valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : ""); // Break the formatted value into the integer “value” part that can be
+               // grouped, and fractional or exponential “suffix” part that is not.
+
+               if (maybeSuffix) {
+                 i = -1, n = value.length;
+
+                 while (++i < n) {
+                   if (c = value.charCodeAt(i), 48 > c || c > 57) {
+                     valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
+                     value = value.slice(0, i);
+                     break;

                    }
                    }

+                 }

                }
                }

+             } // If the fill character is not "0", grouping is applied before padding.

 
 

-               if (c === null) {
-                   c = 0xFFFD;
-                   bytesPerSequence = 1;

 
 

-               } else if (c > 0xFFFF) {
-                   c -= 0x10000;
-                   str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
-                   c = 0xDC00 | c & 0x3FF;
-               }
+             if (comma && !zero) value = group(value, Infinity); // Compute the padding.

 
 

-               str += String.fromCharCode(c);
-               i += bytesPerSequence;
-           }
+             var length = valuePrefix.length + value.length + valueSuffix.length,
+                 padding = length < width ? new Array(width - length + 1).join(fill) : ""; // If the fill character is "0", grouping is applied after padding.

 
 

-           return str;
-       }
+             if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; // Reconstruct the final output based on the desired alignment.

 
 

-       function readUtf8TextDecoder(buf, pos, end) {
-           return utf8TextDecoder.decode(buf.subarray(pos, end));
-       }
+             switch (align) {
+               case "<":
+                 value = valuePrefix + value + valueSuffix + padding;
+                 break;

 
 

-       function writeUtf8(buf, str, pos) {
-           for (var i = 0, c, lead; i < str.length; i++) {
-               c = str.charCodeAt(i); // code point
-
-               if (c > 0xD7FF && c < 0xE000) {
-                   if (lead) {
-                       if (c < 0xDC00) {
-                           buf[pos++] = 0xEF;
-                           buf[pos++] = 0xBF;
-                           buf[pos++] = 0xBD;
-                           lead = c;
-                           continue;
-                       } else {
-                           c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;
-                           lead = null;
-                       }
-                   } else {
-                       if (c > 0xDBFF || (i + 1 === str.length)) {
-                           buf[pos++] = 0xEF;
-                           buf[pos++] = 0xBF;
-                           buf[pos++] = 0xBD;
-                       } else {
-                           lead = c;
-                       }
-                       continue;
-                   }
-               } else if (lead) {
-                   buf[pos++] = 0xEF;
-                   buf[pos++] = 0xBF;
-                   buf[pos++] = 0xBD;
-                   lead = null;
-               }
+               case "=":
+                 value = valuePrefix + padding + value + valueSuffix;
+                 break;

 
 

-               if (c < 0x80) {
-                   buf[pos++] = c;
-               } else {
-                   if (c < 0x800) {
-                       buf[pos++] = c >> 0x6 | 0xC0;
-                   } else {
-                       if (c < 0x10000) {
-                           buf[pos++] = c >> 0xC | 0xE0;
-                       } else {
-                           buf[pos++] = c >> 0x12 | 0xF0;
-                           buf[pos++] = c >> 0xC & 0x3F | 0x80;
-                       }
-                       buf[pos++] = c >> 0x6 & 0x3F | 0x80;
-                   }
-                   buf[pos++] = c & 0x3F | 0x80;
-               }
+               case "^":
+                 value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
+                 break;
+
+               default:
+                 value = padding + valuePrefix + value + valueSuffix;
+                 break;
+             }
+
+             return numerals(value);

            }
            }

-           return pos;
-       }

 
 

-       var pointGeometry = Point;
+           format.toString = function () {
+             return specifier + "";
+           };

 
 

-       /**
-        * A standalone point geometry with useful accessor, comparison, and
-        * modification methods.
-        *
-        * @class Point
-        * @param {Number} x the x-coordinate. this could be longitude or screen
-        * pixels, or any other sort of unit.
-        * @param {Number} y the y-coordinate. this could be latitude or screen
-        * pixels, or any other sort of unit.
-        * @example
-        * var point = new Point(-77, 38);
-        */
-       function Point(x, y) {
-           this.x = x;
-           this.y = y;
+           return format;
+         }
+
+         function formatPrefix(specifier, value) {
+           var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
+               e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
+               k = Math.pow(10, -e),
+               prefix = prefixes[8 + e / 3];
+           return function (value) {
+             return f(k * value) + prefix;
+           };
+         }
+
+         return {
+           format: newFormat,
+           formatPrefix: formatPrefix
+         };

        }
 
        }
 

-       Point.prototype = {
+       var locale;
+       var format$1;
+       var formatPrefix;
+       defaultLocale({
+         thousands: ",",
+         grouping: [3],
+         currency: ["$", ""]
+       });
+       function defaultLocale(definition) {
+         locale = formatLocale(definition);
+         format$1 = locale.format;
+         formatPrefix = locale.formatPrefix;
+         return locale;
+       }

 
 

-           /**
-            * Clone this point, returning a new point that can be modified
-            * without affecting the old one.
-            * @return {Point} the clone
-            */
-           clone: function() { return new Point(this.x, this.y); },
+       function precisionFixed (step) {
+         return Math.max(0, -exponent(Math.abs(step)));
+       }

 
 

-           /**
-            * Add this point's x & y coordinates to another point,
-            * yielding a new point.
-            * @param {Point} p the other point
-            * @return {Point} output point
-            */
-           add:     function(p) { return this.clone()._add(p); },
+       function precisionPrefix (step, value) {
+         return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
+       }

 
 

-           /**
-            * Subtract this point's x & y coordinates to from point,
-            * yielding a new point.
-            * @param {Point} p the other point
-            * @return {Point} output point
-            */
-           sub:     function(p) { return this.clone()._sub(p); },
+       function precisionRound (step, max) {
+         step = Math.abs(step), max = Math.abs(max) - step;
+         return Math.max(0, exponent(max) - exponent(step)) + 1;
+       }

 
 

-           /**
-            * Multiply this point's x & y coordinates by point,
-            * yielding a new point.
-            * @param {Point} p the other point
-            * @return {Point} output point
-            */
-           multByPoint:    function(p) { return this.clone()._multByPoint(p); },
+       function tickFormat(start, stop, count, specifier) {
+         var step = tickStep(start, stop, count),
+             precision;
+         specifier = formatSpecifier(specifier == null ? ",f" : specifier);

 
 

-           /**
-            * Divide this point's x & y coordinates by point,
-            * yielding a new point.
-            * @param {Point} p the other point
-            * @return {Point} output point
-            */
-           divByPoint:     function(p) { return this.clone()._divByPoint(p); },
+         switch (specifier.type) {
+           case "s":
+             {
+               var value = Math.max(Math.abs(start), Math.abs(stop));
+               if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
+               return formatPrefix(specifier, value);
+             }

 
 

-           /**
-            * Multiply this point's x & y coordinates by a factor,
-            * yielding a new point.
-            * @param {Point} k factor
-            * @return {Point} output point
-            */
-           mult:    function(k) { return this.clone()._mult(k); },
+           case "":
+           case "e":
+           case "g":
+           case "p":
+           case "r":
+             {
+               if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
+               break;
+             }

 
 

-           /**
-            * Divide this point's x & y coordinates by a factor,
-            * yielding a new point.
-            * @param {Point} k factor
-            * @return {Point} output point
-            */
-           div:     function(k) { return this.clone()._div(k); },
+           case "f":
+           case "%":
+             {
+               if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
+               break;
+             }
+         }

 
 

-           /**
-            * Rotate this point around the 0, 0 origin by an angle a,
-            * given in radians
-            * @param {Number} a angle to rotate around, in radians
-            * @return {Point} output point
-            */
-           rotate:  function(a) { return this.clone()._rotate(a); },
+         return format$1(specifier);
+       }

 
 

-           /**
-            * Rotate this point around p point by an angle a,
-            * given in radians
-            * @param {Number} a angle to rotate around, in radians
-            * @param {Point} p Point to rotate around
-            * @return {Point} output point
-            */
-           rotateAround:  function(a,p) { return this.clone()._rotateAround(a,p); },
+       function linearish(scale) {
+         var domain = scale.domain;

 
 

-           /**
-            * Multiply this point by a 4x1 transformation matrix
-            * @param {Array<Number>} m transformation matrix
-            * @return {Point} output point
-            */
-           matMult: function(m) { return this.clone()._matMult(m); },
+         scale.ticks = function (count) {
+           var d = domain();
+           return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
+         };

 
 

-           /**
-            * Calculate this point but as a unit vector from 0, 0, meaning
-            * that the distance from the resulting point to the 0, 0
-            * coordinate will be equal to 1 and the angle from the resulting
-            * point to the 0, 0 coordinate will be the same as before.
-            * @return {Point} unit vector point
-            */
-           unit:    function() { return this.clone()._unit(); },
+         scale.tickFormat = function (count, specifier) {
+           var d = domain();
+           return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
+         };

 
 

-           /**
-            * Compute a perpendicular point, where the new y coordinate
-            * is the old x coordinate and the new x coordinate is the old y
-            * coordinate multiplied by -1
-            * @return {Point} perpendicular point
-            */
-           perp:    function() { return this.clone()._perp(); },
+         scale.nice = function (count) {
+           if (count == null) count = 10;
+           var d = domain();
+           var i0 = 0;
+           var i1 = d.length - 1;
+           var start = d[i0];
+           var stop = d[i1];
+           var prestep;
+           var step;
+           var maxIter = 10;

 
 

-           /**
-            * Return a version of this point with the x & y coordinates
-            * rounded to integers.
-            * @return {Point} rounded point
-            */
-           round:   function() { return this.clone()._round(); },
+           if (stop < start) {
+             step = start, start = stop, stop = step;
+             step = i0, i0 = i1, i1 = step;
+           }

 
 

-           /**
-            * Return the magitude of this point: this is the Euclidean
-            * distance from the 0, 0 coordinate to this point's x and y
-            * coordinates.
-            * @return {Number} magnitude
-            */
-           mag: function() {
-               return Math.sqrt(this.x * this.x + this.y * this.y);
-           },
+           while (maxIter-- > 0) {
+             step = tickIncrement(start, stop, count);

 
 

-           /**
-            * Judge whether this point is equal to another point, returning
-            * true or false.
-            * @param {Point} other the other point
-            * @return {boolean} whether the points are equal
-            */
-           equals: function(other) {
-               return this.x === other.x &&
-                      this.y === other.y;
-           },
+             if (step === prestep) {
+               d[i0] = start;
+               d[i1] = stop;
+               return domain(d);
+             } else if (step > 0) {
+               start = Math.floor(start / step) * step;
+               stop = Math.ceil(stop / step) * step;
+             } else if (step < 0) {
+               start = Math.ceil(start * step) / step;
+               stop = Math.floor(stop * step) / step;
+             } else {
+               break;
+             }

 
 

-           /**
-            * Calculate the distance from this point to another point
-            * @param {Point} p the other point
-            * @return {Number} distance
-            */
-           dist: function(p) {
-               return Math.sqrt(this.distSqr(p));
-           },
+             prestep = step;
+           }

 
 

-           /**
-            * Calculate the distance from this point to another point,
-            * without the square root step. Useful if you're comparing
-            * relative distances.
-            * @param {Point} p the other point
-            * @return {Number} distance
-            */
-           distSqr: function(p) {
-               var dx = p.x - this.x,
-                   dy = p.y - this.y;
-               return dx * dx + dy * dy;
-           },
+           return scale;
+         };

 
 

-           /**
-            * Get the angle from the 0, 0 coordinate to this point, in radians
-            * coordinates.
-            * @return {Number} angle
-            */
-           angle: function() {
-               return Math.atan2(this.y, this.x);
-           },
+         return scale;
+       }
+       function linear() {
+         var scale = continuous();

 
 

-           /**
-            * Get the angle from this point to another point, in radians
-            * @param {Point} b the other point
-            * @return {Number} angle
-            */
-           angleTo: function(b) {
-               return Math.atan2(this.y - b.y, this.x - b.x);
-           },
+         scale.copy = function () {
+           return copy(scale, linear());
+         };

 
 

-           /**
-            * Get the angle between this point and another point, in radians
-            * @param {Point} b the other point
-            * @return {Number} angle
-            */
-           angleWith: function(b) {
-               return this.angleWithSep(b.x, b.y);
-           },
+         initRange.apply(scale, arguments);
+         return linearish(scale);
+       }

 
 

-           /*
-            * Find the angle of the two vectors, solving the formula for
-            * the cross product a x b = |a||b|sin(θ) for θ.
-            * @param {Number} x the x-coordinate
-            * @param {Number} y the y-coordinate
-            * @return {Number} the angle in radians
-            */
-           angleWithSep: function(x, y) {
-               return Math.atan2(
-                   this.x * y - this.y * x,
-                   this.x * x + this.y * y);
-           },
+       // eslint-disable-next-line es/no-math-expm1 -- safe
+       var $expm1 = Math.expm1;
+       var exp$1 = Math.exp;

 
 

-           _matMult: function(m) {
-               var x = m[0] * this.x + m[1] * this.y,
-                   y = m[2] * this.x + m[3] * this.y;
-               this.x = x;
-               this.y = y;
-               return this;
-           },
+       // `Math.expm1` method implementation
+       // https://tc39.es/ecma262/#sec-math.expm1
+       var mathExpm1 = (!$expm1
+         // Old FF bug
+         || $expm1(10) > 22025.465794806719 || $expm1(10) < 22025.4657948067165168
+         // Tor Browser bug
+         || $expm1(-2e-17) != -2e-17
+       ) ? function expm1(x) {
+         return (x = +x) == 0 ? x : x > -1e-6 && x < 1e-6 ? x + x * x / 2 : exp$1(x) - 1;
+       } : $expm1;

 
 

-           _add: function(p) {
-               this.x += p.x;
-               this.y += p.y;
-               return this;
-           },
+       function quantize() {
+         var x0 = 0,
+             x1 = 1,
+             n = 1,
+             domain = [0.5],
+             range = [0, 1],
+             unknown;

 
 

-           _sub: function(p) {
-               this.x -= p.x;
-               this.y -= p.y;
-               return this;
-           },
+         function scale(x) {
+           return x != null && x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
+         }

 
 

-           _mult: function(k) {
-               this.x *= k;
-               this.y *= k;
-               return this;
-           },
+         function rescale() {
+           var i = -1;
+           domain = new Array(n);

 
 

-           _div: function(k) {
-               this.x /= k;
-               this.y /= k;
-               return this;
-           },
+           while (++i < n) {
+             domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
+           }

 
 

-           _multByPoint: function(p) {
-               this.x *= p.x;
-               this.y *= p.y;
-               return this;
-           },
+           return scale;
+         }

 
 

-           _divByPoint: function(p) {
-               this.x /= p.x;
-               this.y /= p.y;
-               return this;
-           },
+         scale.domain = function (_) {
+           var _ref, _ref2;

 
 

-           _unit: function() {
-               this._div(this.mag());
-               return this;
-           },
+           return arguments.length ? ((_ref = _, _ref2 = _slicedToArray(_ref, 2), x0 = _ref2[0], x1 = _ref2[1], _ref), x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
+         };

 
 

-           _perp: function() {
-               var y = this.y;
-               this.y = this.x;
-               this.x = -y;
-               return this;
-           },
+         scale.range = function (_) {
+           return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
+         };

 
 

-           _rotate: function(angle) {
-               var cos = Math.cos(angle),
-                   sin = Math.sin(angle),
-                   x = cos * this.x - sin * this.y,
-                   y = sin * this.x + cos * this.y;
-               this.x = x;
-               this.y = y;
-               return this;
-           },
+         scale.invertExtent = function (y) {
+           var i = range.indexOf(y);
+           return i < 0 ? [NaN, NaN] : i < 1 ? [x0, domain[0]] : i >= n ? [domain[n - 1], x1] : [domain[i - 1], domain[i]];
+         };

 
 

-           _rotateAround: function(angle, p) {
-               var cos = Math.cos(angle),
-                   sin = Math.sin(angle),
-                   x = p.x + cos * (this.x - p.x) - sin * (this.y - p.y),
-                   y = p.y + sin * (this.x - p.x) + cos * (this.y - p.y);
-               this.x = x;
-               this.y = y;
-               return this;
-           },
+         scale.unknown = function (_) {
+           return arguments.length ? (unknown = _, scale) : scale;
+         };

 
 

-           _round: function() {
-               this.x = Math.round(this.x);
-               this.y = Math.round(this.y);
-               return this;
-           }
-       };
+         scale.thresholds = function () {
+           return domain.slice();
+         };

 
 

-       /**
-        * Construct a point from an array if necessary, otherwise if the input
-        * is already a Point, or an unknown type, return it unchanged
-        * @param {Array<Number>|Point|*} a any kind of input value
-        * @return {Point} constructed point, or passed-through value.
-        * @example
-        * // this
-        * var point = Point.convert([0, 1]);
-        * // is equivalent to
-        * var point = new Point(0, 1);
-        */
-       Point.convert = function (a) {
-           if (a instanceof Point) {
-               return a;
-           }
-           if (Array.isArray(a)) {
-               return new Point(a[0], a[1]);
-           }
-           return a;
-       };
+         scale.copy = function () {
+           return quantize().domain([x0, x1]).range(range).unknown(unknown);
+         };

 
 

-       var vectortilefeature = VectorTileFeature;
+         return initRange.apply(linearish(scale), arguments);
+       }

 
 

-       function VectorTileFeature(pbf, end, extent, keys, values) {
-           // Public
-           this.properties = {};
-           this.extent = extent;
-           this.type = 0;
+       // https://github.com/tc39/proposal-string-pad-start-end
+       var toLength$2 = toLength$q;
+       var repeat$1 = stringRepeat;
+       var requireObjectCoercible$2 = requireObjectCoercible$e;
+
+       var ceil = Math.ceil;
+
+       // `String.prototype.{ padStart, padEnd }` methods implementation
+       var createMethod = function (IS_END) {
+         return function ($this, maxLength, fillString) {
+           var S = String(requireObjectCoercible$2($this));
+           var stringLength = S.length;
+           var fillStr = fillString === undefined ? ' ' : String(fillString);
+           var intMaxLength = toLength$2(maxLength);
+           var fillLen, stringFiller;
+           if (intMaxLength <= stringLength || fillStr == '') return S;
+           fillLen = intMaxLength - stringLength;
+           stringFiller = repeat$1.call(fillStr, ceil(fillLen / fillStr.length));
+           if (stringFiller.length > fillLen) stringFiller = stringFiller.slice(0, fillLen);
+           return IS_END ? S + stringFiller : stringFiller + S;
+         };
+       };
+
+       var stringPad = {
+         // `String.prototype.padStart` method
+         // https://tc39.es/ecma262/#sec-string.prototype.padstart
+         start: createMethod(false),
+         // `String.prototype.padEnd` method
+         // https://tc39.es/ecma262/#sec-string.prototype.padend
+         end: createMethod(true)
+       };
+
+       var fails$2 = fails$N;
+       var padStart = stringPad.start;
+
+       var abs$1 = Math.abs;
+       var DatePrototype = Date.prototype;
+       var getTime = DatePrototype.getTime;
+       var nativeDateToISOString = DatePrototype.toISOString;
+
+       // `Date.prototype.toISOString` method implementation
+       // https://tc39.es/ecma262/#sec-date.prototype.toisostring
+       // PhantomJS / old WebKit fails here:
+       var dateToIsoString = (fails$2(function () {
+         return nativeDateToISOString.call(new Date(-5e13 - 1)) != '0385-07-25T07:06:39.999Z';
+       }) || !fails$2(function () {
+         nativeDateToISOString.call(new Date(NaN));
+       })) ? function toISOString() {
+         if (!isFinite(getTime.call(this))) throw RangeError('Invalid time value');
+         var date = this;
+         var year = date.getUTCFullYear();
+         var milliseconds = date.getUTCMilliseconds();
+         var sign = year < 0 ? '-' : year > 9999 ? '+' : '';
+         return sign + padStart(abs$1(year), sign ? 6 : 4, 0) +
+           '-' + padStart(date.getUTCMonth() + 1, 2, 0) +
+           '-' + padStart(date.getUTCDate(), 2, 0) +
+           'T' + padStart(date.getUTCHours(), 2, 0) +
+           ':' + padStart(date.getUTCMinutes(), 2, 0) +
+           ':' + padStart(date.getUTCSeconds(), 2, 0) +
+           '.' + padStart(milliseconds, 3, 0) +
+           'Z';
+       } : nativeDateToISOString;
+
+       var $$6 = _export;
+       var toISOString = dateToIsoString;
+
+       // `Date.prototype.toISOString` method
+       // https://tc39.es/ecma262/#sec-date.prototype.toisostring
+       // PhantomJS / old WebKit has a broken implementations
+       $$6({ target: 'Date', proto: true, forced: Date.prototype.toISOString !== toISOString }, {
+         toISOString: toISOString
+       });

 
 

-           // Private
-           this._pbf = pbf;
-           this._geometry = -1;
-           this._keys = keys;
-           this._values = values;
+       function behaviorBreathe() {
+         var duration = 800;
+         var steps = 4;
+         var selector = '.selected.shadow, .selected .shadow';

 
 

-           pbf.readFields(readFeature, this, end);
-       }
+         var _selected = select(null);

 
 

-       function readFeature(tag, feature, pbf) {
-           if (tag == 1) { feature.id = pbf.readVarint(); }
-           else if (tag == 2) { readTag(pbf, feature); }
-           else if (tag == 3) { feature.type = pbf.readVarint(); }
-           else if (tag == 4) { feature._geometry = pbf.pos; }
-       }
+         var _classed = '';
+         var _params = {};
+         var _done = false;

 
 

-       function readTag(pbf, feature) {
-           var end = pbf.readVarint() + pbf.pos;
+         var _timer;

 
 

-           while (pbf.pos < end) {
-               var key = feature._keys[pbf.readVarint()],
-                   value = feature._values[pbf.readVarint()];
-               feature.properties[key] = value;
-           }
-       }
+         function ratchetyInterpolator(a, b, steps, units) {
+           a = parseFloat(a);
+           b = parseFloat(b);
+           var sample = quantize().domain([0, 1]).range(d3_quantize(d3_interpolateNumber(a, b), steps));
+           return function (t) {
+             return String(sample(t)) + (units || '');
+           };
+         }

 
 

-       VectorTileFeature.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
+         function reset(selection) {
+           selection.style('stroke-opacity', null).style('stroke-width', null).style('fill-opacity', null).style('r', null);
+         }

 
 

-       VectorTileFeature.prototype.loadGeometry = function() {
-           var pbf = this._pbf;
-           pbf.pos = this._geometry;
+         function setAnimationParams(transition, fromTo) {
+           var toFrom = fromTo === 'from' ? 'to' : 'from';
+           transition.styleTween('stroke-opacity', function (d) {
+             return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
+           }).styleTween('stroke-width', function (d) {
+             return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
+           }).styleTween('fill-opacity', function (d) {
+             return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
+           }).styleTween('r', function (d) {
+             return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
+           });
+         }

 
 

-           var end = pbf.readVarint() + pbf.pos,
-               cmd = 1,
-               length = 0,
-               x = 0,
-               y = 0,
-               lines = [],
-               line;
+         function calcAnimationParams(selection) {
+           selection.call(reset).each(function (d) {
+             var s = select(this);
+             var tag = s.node().tagName;
+             var p = {
+               'from': {},
+               'to': {}
+             };
+             var opacity;
+             var width; // determine base opacity and width

 
 

-           while (pbf.pos < end) {
-               if (length <= 0) {
-                   var cmdLen = pbf.readVarint();
-                   cmd = cmdLen & 0x7;
-                   length = cmdLen >> 3;
-               }
+             if (tag === 'circle') {
+               opacity = parseFloat(s.style('fill-opacity') || 0.5);
+               width = parseFloat(s.style('r') || 15.5);
+             } else {
+               opacity = parseFloat(s.style('stroke-opacity') || 0.7);
+               width = parseFloat(s.style('stroke-width') || 10);
+             } // calculate from/to interpolation params..

 
 

-               length--;

 
 

-               if (cmd === 1 || cmd === 2) {
-                   x += pbf.readSVarint();
-                   y += pbf.readSVarint();
+             p.tag = tag;
+             p.from.opacity = opacity * 0.6;
+             p.to.opacity = opacity * 1.25;
+             p.from.width = width * 0.7;
+             p.to.width = width * (tag === 'circle' ? 1.5 : 1);
+             _params[d.id] = p;
+           });
+         }

 
 

-                   if (cmd === 1) { // moveTo
-                       if (line) { lines.push(line); }
-                       line = [];
-                   }
+         function run(surface, fromTo) {
+           var toFrom = fromTo === 'from' ? 'to' : 'from';
+           var currSelected = surface.selectAll(selector);
+           var currClassed = surface.attr('class');

 
 

-                   line.push(new pointGeometry(x, y));
+           if (_done || currSelected.empty()) {
+             _selected.call(reset);

 
 

-               } else if (cmd === 7) {
+             _selected = select(null);
+             return;
+           }

 
 

-                   // Workaround for https://github.com/mapbox/mapnik-vector-tile/issues/90
-                   if (line) {
-                       line.push(line[0].clone()); // closePolygon
-                   }
+           if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
+             _selected.call(reset);

 
 

-               } else {
-                   throw new Error('unknown command ' + cmd);
-               }
+             _classed = currClassed;
+             _selected = currSelected.call(calcAnimationParams);

            }
 
            }
 

-           if (line) { lines.push(line); }
+           var didCallNextRun = false;

 
 

-           return lines;
-       };
+           _selected.transition().duration(duration).call(setAnimationParams, fromTo).on('end', function () {
+             // `end` event is called for each selected element, but we want
+             // it to run only once
+             if (!didCallNextRun) {
+               surface.call(run, toFrom);
+               didCallNextRun = true;
+             } // if entity was deselected, remove breathe styling

 
 

-       VectorTileFeature.prototype.bbox = function() {
-           var pbf = this._pbf;
-           pbf.pos = this._geometry;

 
 

-           var end = pbf.readVarint() + pbf.pos,
-               cmd = 1,
-               length = 0,
-               x = 0,
-               y = 0,
-               x1 = Infinity,
-               x2 = -Infinity,
-               y1 = Infinity,
-               y2 = -Infinity;
+             if (!select(this).classed('selected')) {
+               reset(select(this));
+             }
+           });
+         }

 
 

-           while (pbf.pos < end) {
-               if (length <= 0) {
-                   var cmdLen = pbf.readVarint();
-                   cmd = cmdLen & 0x7;
-                   length = cmdLen >> 3;
-               }
+         function behavior(surface) {
+           _done = false;
+           _timer = timer(function () {
+             // wait for elements to actually become selected
+             if (surface.selectAll(selector).empty()) {
+               return false;
+             }

 
 

-               length--;
+             surface.call(run, 'from');

 
 

-               if (cmd === 1 || cmd === 2) {
-                   x += pbf.readSVarint();
-                   y += pbf.readSVarint();
-                   if (x < x1) { x1 = x; }
-                   if (x > x2) { x2 = x; }
-                   if (y < y1) { y1 = y; }
-                   if (y > y2) { y2 = y; }
+             _timer.stop();

 
 

-               } else if (cmd !== 7) {
-                   throw new Error('unknown command ' + cmd);
-               }
-           }
+             return true;
+           }, 20);
+         }

 
 

-           return [x1, y1, x2, y2];
-       };
+         behavior.restartIfNeeded = function (surface) {
+           if (_selected.empty()) {
+             surface.call(run, 'from');

 
 

-       VectorTileFeature.prototype.toGeoJSON = function(x, y, z) {
-           var size = this.extent * Math.pow(2, z),
-               x0 = this.extent * x,
-               y0 = this.extent * y,
-               coords = this.loadGeometry(),
-               type = VectorTileFeature.types[this.type],
-               i, j;
+             if (_timer) {
+               _timer.stop();
+             }
+           }
+         };

 
 

-           function project(line) {
-               for (var j = 0; j < line.length; j++) {
-                   var p = line[j], y2 = 180 - (p.y + y0) * 360 / size;
-                   line[j] = [
-                       (p.x + x0) * 360 / size - 180,
-                       360 / Math.PI * Math.atan(Math.exp(y2 * Math.PI / 180)) - 90
-                   ];
-               }
+         behavior.off = function () {
+           _done = true;
+
+           if (_timer) {
+             _timer.stop();

            }
 
            }
 

-           switch (this.type) {
-           case 1:
-               var points = [];
-               for (i = 0; i < coords.length; i++) {
-                   points[i] = coords[i][0];
-               }
-               coords = points;
-               project(coords);
-               break;
+           _selected.interrupt().call(reset);
+         };

 
 

-           case 2:
-               for (i = 0; i < coords.length; i++) {
-                   project(coords[i]);
-               }
-               break;
+         return behavior;
+       }

 
 

-           case 3:
-               coords = classifyRings(coords);
-               for (i = 0; i < coords.length; i++) {
-                   for (j = 0; j < coords[i].length; j++) {
-                       project(coords[i][j]);
-                   }
-               }
-               break;
-           }
+       /* Creates a keybinding behavior for an operation */
+       function behaviorOperation(context) {
+         var _operation;

 
 

-           if (coords.length === 1) {
-               coords = coords[0];
+         function keypress(d3_event) {
+           // prevent operations during low zoom selection
+           if (!context.map().withinEditableZoom()) return;
+           if (_operation.availableForKeypress && !_operation.availableForKeypress()) return;
+           d3_event.preventDefault();
+
+           var disabled = _operation.disabled();
+
+           if (disabled) {
+             context.ui().flash.duration(4000).iconName('#iD-operation-' + _operation.id).iconClass('operation disabled').label(_operation.tooltip)();

            } else {
            } else {

-               type = 'Multi' + type;
-           }
+             context.ui().flash.duration(2000).iconName('#iD-operation-' + _operation.id).iconClass('operation').label(_operation.annotation() || _operation.title)();
+             if (_operation.point) _operation.point(null);

 
 

-           var result = {
-               type: "Feature",
-               geometry: {
-                   type: type,
-                   coordinates: coords
-               },
-               properties: this.properties
-           };
+             _operation();
+           }
+         }

 
 

-           if ('id' in this) {
-               result.id = this.id;
+         function behavior() {
+           if (_operation && _operation.available()) {
+             context.keybinding().on(_operation.keys, keypress);

            }
 
            }
 

-           return result;
-       };
+           return behavior;
+         }
+
+         behavior.off = function () {
+           context.keybinding().off(_operation.keys);
+         };

 
 

-       // classifies an array of rings into polygons with outer rings and holes
+         behavior.which = function (_) {
+           if (!arguments.length) return _operation;
+           _operation = _;
+           return behavior;
+         };

 
 

-       function classifyRings(rings) {
-           var len = rings.length;
+         return behavior;
+       }

 
 

-           if (len <= 1) { return [rings]; }
+       function operationCircularize(context, selectedIDs) {
+         var _extent;

 
 

-           var polygons = [],
-               polygon,
-               ccw;
+         var _actions = selectedIDs.map(getAction).filter(Boolean);

 
 

-           for (var i = 0; i < len; i++) {
-               var area = signedArea$1(rings[i]);
-               if (area === 0) { continue; }
+         var _amount = _actions.length === 1 ? 'single' : 'multiple';

 
 

-               if (ccw === undefined) { ccw = area < 0; }
+         var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+           return n.loc;
+         });

 
 

-               if (ccw === area < 0) {
-                   if (polygon) { polygons.push(polygon); }
-                   polygon = [rings[i]];
+         function getAction(entityID) {
+           var entity = context.entity(entityID);
+           if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) return null;

 
 

-               } else {
-                   polygon.push(rings[i]);
-               }
+           if (!_extent) {
+             _extent = entity.extent(context.graph());
+           } else {
+             _extent = _extent.extend(entity.extent(context.graph()));

            }
            }

-           if (polygon) { polygons.push(polygon); }

 
 

-           return polygons;
-       }
+           return actionCircularize(entityID, context.projection);
+         }

 
 

-       function signedArea$1(ring) {
-           var sum = 0;
-           for (var i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {
-               p1 = ring[i];
-               p2 = ring[j];
-               sum += (p2.x - p1.x) * (p1.y + p2.y);
-           }
-           return sum;
-       }
+         var operation = function operation() {
+           if (!_actions.length) return;

 
 

-       var vectortilelayer = VectorTileLayer;
+           var combinedAction = function combinedAction(graph, t) {
+             _actions.forEach(function (action) {
+               if (!action.disabled(graph)) {
+                 graph = action(graph, t);
+               }
+             });

 
 

-       function VectorTileLayer(pbf, end) {
-           // Public
-           this.version = 1;
-           this.name = null;
-           this.extent = 4096;
-           this.length = 0;
+             return graph;
+           };

 
 

-           // Private
-           this._pbf = pbf;
-           this._keys = [];
-           this._values = [];
-           this._features = [];
+           combinedAction.transitionable = true;
+           context.perform(combinedAction, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
+         };

 
 

-           pbf.readFields(readLayer, this, end);
+         operation.available = function () {
+           return _actions.length && selectedIDs.length === _actions.length;
+         }; // don't cache this because the visible extent could change

 
 

-           this.length = this._features.length;
-       }

 
 

-       function readLayer(tag, layer, pbf) {
-           if (tag === 15) { layer.version = pbf.readVarint(); }
-           else if (tag === 1) { layer.name = pbf.readString(); }
-           else if (tag === 5) { layer.extent = pbf.readVarint(); }
-           else if (tag === 2) { layer._features.push(pbf.pos); }
-           else if (tag === 3) { layer._keys.push(pbf.readString()); }
-           else if (tag === 4) { layer._values.push(readValueMessage(pbf)); }
-       }
+         operation.disabled = function () {
+           if (!_actions.length) return '';

 
 

-       function readValueMessage(pbf) {
-           var value = null,
-               end = pbf.readVarint() + pbf.pos;
+           var actionDisableds = _actions.map(function (action) {
+             return action.disabled(context.graph());
+           }).filter(Boolean);

 
 

-           while (pbf.pos < end) {
-               var tag = pbf.readVarint() >> 3;
+           if (actionDisableds.length === _actions.length) {
+             // none of the features can be circularized
+             if (new Set(actionDisableds).size > 1) {
+               return 'multiple_blockers';
+             }

 
 

-               value = tag === 1 ? pbf.readString() :
-                   tag === 2 ? pbf.readFloat() :
-                   tag === 3 ? pbf.readDouble() :
-                   tag === 4 ? pbf.readVarint64() :
-                   tag === 5 ? pbf.readVarint() :
-                   tag === 6 ? pbf.readSVarint() :
-                   tag === 7 ? pbf.readBoolean() : null;
+             return actionDisableds[0];
+           } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';

            }
 
            }
 

-           return value;
-       }
+           return false;

 
 

-       // return feature `i` from this layer as a `VectorTileFeature`
-       VectorTileLayer.prototype.feature = function(i) {
-           if (i < 0 || i >= this._features.length) { throw new Error('feature index out of bounds'); }
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();

 
 

-           this._pbf.pos = this._features[i];
+             if (osm) {
+               var missing = _coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });

 
 

-           var end = this._pbf.readVarint() + this._pbf.pos;
-           return new vectortilefeature(this._pbf, end, this.extent, this._keys, this._values);
-       };
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }

 
 

-       var vectortile = VectorTile;
+             return false;
+           }
+         };

 
 

-       function VectorTile(pbf, end) {
-           this.layers = pbf.readFields(readTile, {}, end);
-       }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.circularize.' + disable + '.' + _amount) : _t('operations.circularize.description.' + _amount);
+         };

 
 

-       function readTile(tag, layers, pbf) {
-           if (tag === 3) {
-               var layer = new vectortilelayer(pbf, pbf.readVarint() + pbf.pos);
-               if (layer.length) { layers[layer.name] = layer; }
-           }
+         operation.annotation = function () {
+           return _t('operations.circularize.annotation.feature', {
+             n: _actions.length
+           });
+         };
+
+         operation.id = 'circularize';
+         operation.keys = [_t('operations.circularize.key')];
+         operation.title = _t('operations.circularize.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;

        }
 
        }
 

-       var VectorTile$1 = vectortile;
-       var VectorTileFeature$1 = vectortilefeature;
-       var VectorTileLayer$1 = vectortilelayer;
+       // For example, ⌘Z -> Ctrl+Z

 
 

-       var vectorTile = {
-               VectorTile: VectorTile$1,
-               VectorTileFeature: VectorTileFeature$1,
-               VectorTileLayer: VectorTileLayer$1
-       };
+       var uiCmd = function uiCmd(code) {
+         var detected = utilDetect();

 
 

-       var tiler$7 = utilTiler().tileSize(512).margin(1);
-       var dispatch$8 = dispatch('loadedData');
-       var _vtCache;
+         if (detected.os === 'mac') {
+           return code;
+         }

 
 

+         if (detected.os === 'win') {
+           if (code === '⌘⇧Z') return 'Ctrl+Y';
+         }

 
 

-       function abortRequest$7(controller) {
-           controller.abort();
-       }
+         var result = '',
+             replacements = {
+           '⌘': 'Ctrl',
+           '⇧': 'Shift',
+           '⌥': 'Alt',
+           '⌫': 'Backspace',
+           '⌦': 'Delete'
+         };

 
 

+         for (var i = 0; i < code.length; i++) {
+           if (code[i] in replacements) {
+             result += replacements[code[i]] + (i < code.length - 1 ? '+' : '');
+           } else {
+             result += code[i];
+           }
+         }

 
 

-       function vtToGeoJSON(data, tile, mergeCache) {
-           var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
-           var layers = Object.keys(vectorTile$1.layers);
-           if (!Array.isArray(layers)) { layers = [layers]; }
-
-           var features = [];
-           layers.forEach(function(layerID) {
-               var layer = vectorTile$1.layers[layerID];
-               if (layer) {
-                   for (var i = 0; i < layer.length; i++) {
-                       var feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
-                       var geometry = feature.geometry;
-
-                       // Treat all Polygons as MultiPolygons
-                       if (geometry.type === 'Polygon') {
-                           geometry.type = 'MultiPolygon';
-                           geometry.coordinates = [geometry.coordinates];
-                       }
+         return result;
+       }; // return a display-focused string for a given keyboard code

 
 

-                       // Clip to tile bounds
-                       if (geometry.type === 'MultiPolygon') {
-                           var isClipped = false;
-                           var featureClip = bboxClip_1(feature, tile.extent.rectangle());
-                           if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
-                               // feature = featureClip;
-                               isClipped = true;
-                           }
-                           if (!feature.geometry.coordinates.length) { continue; }   // not actually on this tile
-                           if (!feature.geometry.coordinates[0].length) { continue; }   // not actually on this tile
-                       }
+       uiCmd.display = function (code) {
+         if (code.length !== 1) return code;
+         var detected = utilDetect();
+         var mac = detected.os === 'mac';
+         var replacements = {
+           '⌘': mac ? '⌘ ' + _t('shortcuts.key.cmd') : _t('shortcuts.key.ctrl'),
+           '⇧': mac ? '⇧ ' + _t('shortcuts.key.shift') : _t('shortcuts.key.shift'),
+           '⌥': mac ? '⌥ ' + _t('shortcuts.key.option') : _t('shortcuts.key.alt'),
+           '⌃': mac ? '⌃ ' + _t('shortcuts.key.ctrl') : _t('shortcuts.key.ctrl'),
+           '⌫': mac ? '⌫ ' + _t('shortcuts.key.delete') : _t('shortcuts.key.backspace'),
+           '⌦': mac ? '⌦ ' + _t('shortcuts.key.del') : _t('shortcuts.key.del'),
+           '↖': mac ? '↖ ' + _t('shortcuts.key.pgup') : _t('shortcuts.key.pgup'),
+           '↘': mac ? '↘ ' + _t('shortcuts.key.pgdn') : _t('shortcuts.key.pgdn'),
+           '⇞': mac ? '⇞ ' + _t('shortcuts.key.home') : _t('shortcuts.key.home'),
+           '⇟': mac ? '⇟ ' + _t('shortcuts.key.end') : _t('shortcuts.key.end'),
+           '↵': mac ? '⏎ ' + _t('shortcuts.key.return') : _t('shortcuts.key.enter'),
+           '⎋': mac ? '⎋ ' + _t('shortcuts.key.esc') : _t('shortcuts.key.esc'),
+           '☰': mac ? '☰ ' + _t('shortcuts.key.menu') : _t('shortcuts.key.menu')
+         };
+         return replacements[code] || code;
+       };

 
 

-                       // Generate some unique IDs and add some metadata
-                       var featurehash = utilHashcode(fastJsonStableStringify(feature));
-                       var propertyhash = utilHashcode(fastJsonStableStringify(feature.properties || {}));
-                       feature.__layerID__ = layerID.replace(/[^_a-zA-Z0-9\-]/g, '_');
-                       feature.__featurehash__ = featurehash;
-                       feature.__propertyhash__ = propertyhash;
-                       features.push(feature);
-
-                       // Clipped Polygons at same zoom with identical properties can get merged
-                       if (isClipped && geometry.type === 'MultiPolygon') {
-                           var merged = mergeCache[propertyhash];
-                           if (merged && merged.length) {
-                               var other = merged[0];
-                               var coords = union(
-                                   feature.geometry.coordinates,
-                                   other.geometry.coordinates
-                               );
-
-                               if (!coords || !coords.length) {
-                                   continue;  // something failed in martinez union
-                               }
-
-                               merged.push(feature);
-                               for (var j = 0; j < merged.length; j++) {      // all these features get...
-                                   merged[j].geometry.coordinates = coords;   // same coords
-                                   merged[j].__featurehash__ = featurehash;   // same hash, so deduplication works
-                               }
-                           } else {
-                               mergeCache[propertyhash] = [feature];
-                           }
-                       }
-                   }
+       function operationDelete(context, selectedIDs) {
+         var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+         var action = actionDeleteMultiple(selectedIDs);
+         var nodes = utilGetAllNodes(selectedIDs, context.graph());
+         var coords = nodes.map(function (n) {
+           return n.loc;
+         });
+         var extent = utilTotalExtent(selectedIDs, context.graph());
+
+         var operation = function operation() {
+           var nextSelectedID;
+           var nextSelectedLoc;
+
+           if (selectedIDs.length === 1) {
+             var id = selectedIDs[0];
+             var entity = context.entity(id);
+             var geometry = entity.geometry(context.graph());
+             var parents = context.graph().parentWays(entity);
+             var parent = parents[0]; // Select the next closest node in the way.
+
+             if (geometry === 'vertex') {
+               var nodes = parent.nodes;
+               var i = nodes.indexOf(id);
+
+               if (i === 0) {
+                 i++;
+               } else if (i === nodes.length - 1) {
+                 i--;
+               } else {
+                 var a = geoSphericalDistance(entity.loc, context.entity(nodes[i - 1]).loc);
+                 var b = geoSphericalDistance(entity.loc, context.entity(nodes[i + 1]).loc);
+                 i = a < b ? i - 1 : i + 1;

                }
                }

-           });

 
 

-           return features;
-       }
+               nextSelectedID = nodes[i];
+               nextSelectedLoc = context.entity(nextSelectedID).loc;
+             }
+           }

 
 

+           context.perform(action, operation.annotation());
+           context.validator().validate();

 
 

-       function loadTile(source, tile) {
-           if (source.loaded[tile.id] || source.inflight[tile.id]) { return; }
-
-           var url = source.template
-               .replace('{x}', tile.xyz[0])
-               .replace('{y}', tile.xyz[1])
-               // TMS-flipped y coordinate
-               .replace(/\{[t-]y\}/, Math.pow(2, tile.xyz[2]) - tile.xyz[1] - 1)
-               .replace(/\{z(oom)?\}/, tile.xyz[2])
-               .replace(/\{switch:([^}]+)\}/, function(s, r) {
-                   var subdomains = r.split(',');
-                   return subdomains[(tile.xyz[0] + tile.xyz[1]) % subdomains.length];
-               });
+           if (nextSelectedID && nextSelectedLoc) {
+             if (context.hasEntity(nextSelectedID)) {
+               context.enter(modeSelect(context, [nextSelectedID]).follow(true));
+             } else {
+               context.map().centerEase(nextSelectedLoc);
+               context.enter(modeBrowse(context));
+             }
+           } else {
+             context.enter(modeBrowse(context));
+           }
+         };

 
 

+         operation.available = function () {
+           return true;
+         };

 
 

-           var controller = new AbortController();
-           source.inflight[tile.id] = controller;
+         operation.disabled = function () {
+           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           } else if (selectedIDs.some(protectedMember)) {
+             return 'part_of_relation';
+           } else if (selectedIDs.some(incompleteRelation)) {
+             return 'incomplete_relation';
+           } else if (selectedIDs.some(hasWikidataTag)) {
+             return 'has_wikidata_tag';
+           }

 
 

-           fetch(url, { signal: controller.signal })
-               .then(function(response) {
-                   if (!response.ok) {
-                       throw new Error(response.status + ' ' + response.statusText);
-                   }
-                   source.loaded[tile.id] = [];
-                   delete source.inflight[tile.id];
-                   return response.arrayBuffer();
-               })
-               .then(function(data) {
-                   if (!data) {
-                       throw new Error('No Data');
-                   }
+           return false;

 
 

-                   var z = tile.xyz[2];
-                   if (!source.canMerge[z]) {
-                       source.canMerge[z] = {};  // initialize mergeCache
-                   }
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();

 
 

-                   source.loaded[tile.id] = vtToGeoJSON(data, tile, source.canMerge[z]);
-                   dispatch$8.call('loadedData');
-               })
-               .catch(function() {
-                   source.loaded[tile.id] = [];
-                   delete source.inflight[tile.id];
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);

                });
                });

-       }
-
-
-       var serviceVectorTile = {

 
 

-           init: function() {
-               if (!_vtCache) {
-                   this.reset();
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;

                }
                }

+             }

 
 

-               this.event = utilRebind(this, dispatch$8, 'on');
-           },
+             return false;
+           }

 
 

+           function hasWikidataTag(id) {
+             var entity = context.entity(id);
+             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+           }

 
 

-           reset: function() {
-               for (var sourceID in _vtCache) {
-                   var source = _vtCache[sourceID];
-                   if (source && source.inflight) {
-                       Object.values(source.inflight).forEach(abortRequest$7);
-                   }
-               }
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());
+           }

 
 

-               _vtCache = {};
-           },
+           function protectedMember(id) {
+             var entity = context.entity(id);
+             if (entity.type !== 'way') return false;
+             var parents = context.graph().parentRelations(entity);

 
 

+             for (var i = 0; i < parents.length; i++) {
+               var parent = parents[i];
+               var type = parent.tags.type;
+               var role = parent.memberById(id).role || 'outer';

 
 

-           addSource: function(sourceID, template) {
-               _vtCache[sourceID] = { template: template, inflight: {}, loaded: {}, canMerge: {} };
-               return _vtCache[sourceID];
-           },
+               if (type === 'route' || type === 'boundary' || type === 'multipolygon' && role === 'outer') {
+                 return true;
+               }
+             }
+
+             return false;
+           }
+         };

 
 

+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.delete.' + disable + '.' + multi) : _t('operations.delete.description.' + multi);
+         };

 
 

-           data: function(sourceID, projection) {
-               var source = _vtCache[sourceID];
-               if (!source) { return []; }
+         operation.annotation = function () {
+           return selectedIDs.length === 1 ? _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.delete.annotation.feature', {
+             n: selectedIDs.length
+           });
+         };

 
 

-               var tiles = tiler$7.getTiles(projection);
-               var seen = {};
-               var results = [];
+         operation.id = 'delete';
+         operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
+         operation.title = _t('operations.delete.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }

 
 

-               for (var i = 0; i < tiles.length; i++) {
-                   var features = source.loaded[tiles[i].id];
-                   if (!features || !features.length) { continue; }
+       function operationOrthogonalize(context, selectedIDs) {
+         var _extent;

 
 

-                   for (var j = 0; j < features.length; j++) {
-                       var feature = features[j];
-                       var hash = feature.__featurehash__;
-                       if (seen[hash]) { continue; }
-                       seen[hash] = true;
+         var _type;

 
 

-                       // return a shallow copy, because the hash may change
-                       // later if this feature gets merged with another
-                       results.push(Object.assign({}, feature));  // shallow copy
-                   }
-               }
+         var _actions = selectedIDs.map(chooseAction).filter(Boolean);

 
 

-               return results;
-           },
+         var _amount = _actions.length === 1 ? 'single' : 'multiple';

 
 

+         var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+           return n.loc;
+         });

 
 

-           loadTiles: function(sourceID, template, projection) {
-               var source = _vtCache[sourceID];
-               if (!source) {
-                   source = this.addSource(sourceID, template);
-               }
+         function chooseAction(entityID) {
+           var entity = context.entity(entityID);
+           var geometry = entity.geometry(context.graph());

 
 

-               var tiles = tiler$7.getTiles(projection);
+           if (!_extent) {
+             _extent = entity.extent(context.graph());
+           } else {
+             _extent = _extent.extend(entity.extent(context.graph()));
+           } // square a line/area

 
 

-               // abort inflight requests that are no longer needed
-               Object.keys(source.inflight).forEach(function(k) {
-                   var wanted = tiles.find(function(tile) { return k === tile.id; });
-                   if (!wanted) {
-                       abortRequest$7(source.inflight[k]);
-                       delete source.inflight[k];
-                   }
-               });

 
 

-               tiles.forEach(function(tile) {
-                   loadTile(source, tile);
-               });
-           },
+           if (entity.type === 'way' && new Set(entity.nodes).size > 2) {
+             if (_type && _type !== 'feature') return null;
+             _type = 'feature';
+             return actionOrthogonalize(entityID, context.projection); // square a single vertex
+           } else if (geometry === 'vertex') {
+             if (_type && _type !== 'corner') return null;
+             _type = 'corner';
+             var graph = context.graph();
+             var parents = graph.parentWays(entity);

 
 

+             if (parents.length === 1) {
+               var way = parents[0];

 
 

-           cache: function() {
-               return _vtCache;
+               if (way.nodes.indexOf(entityID) !== -1) {
+                 return actionOrthogonalize(way.id, context.projection, entityID);
+               }
+             }

            }
 
            }
 

-       };
+           return null;
+         }

 
 

-       var apibase$5 = 'https://www.wikidata.org/w/api.php?';
-       var _wikidataCache = {};
+         var operation = function operation() {
+           if (!_actions.length) return;

 
 

+           var combinedAction = function combinedAction(graph, t) {
+             _actions.forEach(function (action) {
+               if (!action.disabled(graph)) {
+                 graph = action(graph, t);
+               }
+             });

 
 

-       var serviceWikidata = {
+             return graph;
+           };

 
 

-           init: function() {},
+           combinedAction.transitionable = true;
+           context.perform(combinedAction, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
+         };

 
 

-           reset: function() {
-               _wikidataCache = {};
-           },
+         operation.available = function () {
+           return _actions.length && selectedIDs.length === _actions.length;
+         }; // don't cache this because the visible extent could change

 
 
 
 

-           // Search for Wikidata items matching the query
-           itemsForSearchQuery: function(query, callback) {
-               if (!query) {
-                   if (callback) { callback('No query', {}); }
-                   return;
-               }
+         operation.disabled = function () {
+           if (!_actions.length) return '';

 
 

-               var lang = this.languagesToQuery()[0];
-
-               var url = apibase$5 + utilQsString({
-                   action: 'wbsearchentities',
-                   format: 'json',
-                   formatversion: 2,
-                   search: query,
-                   type: 'item',
-                   // the language to search
-                   language: lang,
-                   // the langauge for the label and description in the result
-                   uselang: lang,
-                   limit: 10,
-                   origin: '*'
-               });
+           var actionDisableds = _actions.map(function (action) {
+             return action.disabled(context.graph());
+           }).filter(Boolean);

 
 

-               d3_json(url)
-                   .then(function(result) {
-                       if (result && result.error) {
-                           throw new Error(result.error);
-                       }
-                       if (callback) { callback(null, result.search || {}); }
-                   })
-                   .catch(function(err) {
-                       if (callback) { callback(err.message, {}); }
-                   });
-           },
+           if (actionDisableds.length === _actions.length) {
+             // none of the features can be squared
+             if (new Set(actionDisableds).size > 1) {
+               return 'multiple_blockers';
+             }

 
 

+             return actionDisableds[0];
+           } else if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           }

 
 

-           // Given a Wikipedia language and article title,
-           // return an array of corresponding Wikidata entities.
-           itemsByTitle: function(lang, title, callback) {
-               if (!title) {
-                   if (callback) { callback('No title', {}); }
-                   return;
-               }
+           return false;

 
 

-               lang = lang || 'en';
-               var url = apibase$5 + utilQsString({
-                   action: 'wbgetentities',
-                   format: 'json',
-                   formatversion: 2,
-                   sites: lang.replace(/-/g, '_') + 'wiki',
-                   titles: title,
-                   languages: 'en', // shrink response by filtering to one language
-                   origin: '*'
-               });
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();

 
 

-               d3_json(url)
-                   .then(function(result) {
-                       if (result && result.error) {
-                           throw new Error(result.error);
-                       }
-                       if (callback) { callback(null, result.entities || {}); }
-                   })
-                   .catch(function(err) {
-                       if (callback) { callback(err.message, {}); }
-                   });
-           },
+             if (osm) {
+               var missing = _coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });

 
 

+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }

 
 

-           languagesToQuery: function() {
-               var localeCode = _mainLocalizer.localeCode().toLowerCase();
-               // HACK: en-us isn't a wikidata language. We should really be filtering by
-               // the languages known to be supported by wikidata.
-               if (localeCode === 'en-us') { localeCode = 'en'; }
-               return utilArrayUniq([
-                   localeCode,
-                   _mainLocalizer.languageCode().toLowerCase(),
-                   'en'
-               ]);
-           },
+             return false;
+           }
+         };

 
 

+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.orthogonalize.' + disable + '.' + _amount) : _t('operations.orthogonalize.description.' + _type + '.' + _amount);
+         };

 
 

-           entityByQID: function(qid, callback) {
-               if (!qid) {
-                   callback('No qid', {});
-                   return;
-               }
-               if (_wikidataCache[qid]) {
-                   if (callback) { callback(null, _wikidataCache[qid]); }
-                   return;
-               }
+         operation.annotation = function () {
+           return _t('operations.orthogonalize.annotation.' + _type, {
+             n: _actions.length
+           });
+         };

 
 

-               var langs = this.languagesToQuery();
-               var url = apibase$5 + utilQsString({
-                   action: 'wbgetentities',
-                   format: 'json',
-                   formatversion: 2,
-                   ids: qid,
-                   props: 'labels|descriptions|claims|sitelinks',
-                   sitefilter: langs.map(function(d) { return d + 'wiki'; }).join('|'),
-                   languages: langs.join('|'),
-                   languagefallback: 1,
-                   origin: '*'
-               });
+         operation.id = 'orthogonalize';
+         operation.keys = [_t('operations.orthogonalize.key')];
+         operation.title = _t('operations.orthogonalize.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }

 
 

-               d3_json(url)
-                   .then(function(result) {
-                       if (result && result.error) {
-                           throw new Error(result.error);
-                       }
-                       if (callback) { callback(null, result.entities[qid] || {}); }
-                   })
-                   .catch(function(err) {
-                       if (callback) { callback(err.message, {}); }
-                   });
-           },
+       function operationReflectShort(context, selectedIDs) {
+         return operationReflect(context, selectedIDs, 'short');
+       }
+       function operationReflectLong(context, selectedIDs) {
+         return operationReflect(context, selectedIDs, 'long');
+       }
+       function operationReflect(context, selectedIDs, axis) {
+         axis = axis || 'long';
+         var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+         var nodes = utilGetAllNodes(selectedIDs, context.graph());
+         var coords = nodes.map(function (n) {
+           return n.loc;
+         });
+         var extent = utilTotalExtent(selectedIDs, context.graph());

 
 

+         var operation = function operation() {
+           var action = actionReflect(selectedIDs, context.projection).useLongAxis(Boolean(axis === 'long'));
+           context.perform(action, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
+         };

 
 

-           // Pass `params` object of the form:
-           // {
-           //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
-           // }
-           //
-           // Get an result object used to display tag documentation
-           // {
-           //   title:        'string',
-           //   description:  'string',
-           //   editURL:      'string',
-           //   imageURL:     'string',
-           //   wiki:         { title: 'string', text: 'string', url: 'string' }
-           // }
-           //
-           getDocs: function(params, callback) {
-               var langs = this.languagesToQuery();
-               this.entityByQID(params.qid, function(err, entity) {
-                   if (err || !entity) {
-                       callback(err || 'No entity');
-                       return;
-                   }
+         operation.available = function () {
+           return nodes.length >= 3;
+         }; // don't cache this because the visible extent could change

 
 

-                   var i;
-                   var description;
-                   if (entity.descriptions && Object.keys(entity.descriptions).length > 0) {
-                       description = entity.descriptions[Object.keys(entity.descriptions)[0]].value;
-                   }

 
 

-                   // prepare result
-                   var result = {
-                       title: entity.id,
-                       description: description,
-                       editURL: 'https://www.wikidata.org/wiki/' + entity.id
-                   };
+         operation.disabled = function () {
+           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           } else if (selectedIDs.some(incompleteRelation)) {
+             return 'incomplete_relation';
+           }

 
 

-                   // add image
-                   if (entity.claims) {
-                       var imageroot = 'https://commons.wikimedia.org/w/index.php';
-                       var props = ['P154','P18'];  // logo image, image
-                       var prop, image;
-                       for (i = 0; i < props.length; i++) {
-                           prop = entity.claims[props[i]];
-                           if (prop && Object.keys(prop).length > 0) {
-                               image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;
-                               if (image) {
-                                   result.imageURL = imageroot + '?' + utilQsString({
-                                       title: 'Special:Redirect/file/' + image,
-                                       width: 400
-                                   });
-                                   break;
-                               }
-                           }
-                       }
-                   }
+           return false;

 
 

-                   if (entity.sitelinks) {
-                       var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en';
-
-                       // must be one of these that we requested..
-                       for (i = 0; i < langs.length; i++) {   // check each, in order of preference
-                           var w = langs[i] + 'wiki';
-                           if (entity.sitelinks[w]) {
-                               var title = entity.sitelinks[w].title;
-                               var tKey = 'inspector.wiki_reference';
-                               if (!englishLocale && langs[i] === 'en') {   // user's locale isn't English but
-                                   tKey = 'inspector.wiki_en_reference';    // we are sending them to enwiki anyway..
-                               }
-
-                               result.wiki = {
-                                   title: title,
-                                   text: tKey,
-                                   url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
-                               };
-                               break;
-                           }
-                       }
-                   }
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();

 
 

-                   callback(null, result);
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);

                });
                });

-           }

 
 

-       };
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }

 
 

-       var endpoint = 'https://en.wikipedia.org/w/api.php?';
+             return false;
+           }

 
 

-       var serviceWikipedia = {
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());
+           }
+         };

 
 

-           init: function() {},
-           reset: function() {},
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.reflect.' + disable + '.' + multi) : _t('operations.reflect.description.' + axis + '.' + multi);
+         };

 
 

+         operation.annotation = function () {
+           return _t('operations.reflect.annotation.' + axis + '.feature', {
+             n: selectedIDs.length
+           });
+         };

 
 

-           search: function(lang, query, callback) {
-               if (!query) {
-                   if (callback) { callback('No Query', []); }
-                   return;
-               }
+         operation.id = 'reflect-' + axis;
+         operation.keys = [_t('operations.reflect.key.' + axis)];
+         operation.title = _t('operations.reflect.title.' + axis);
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }

 
 

-               lang = lang || 'en';
-               var url = endpoint.replace('en', lang) +
-                   utilQsString({
-                       action: 'query',
-                       list: 'search',
-                       srlimit: '10',
-                       srinfo: 'suggestion',
-                       format: 'json',
-                       origin: '*',
-                       srsearch: query
-                   });
+       function operationMove(context, selectedIDs) {
+         var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+         var nodes = utilGetAllNodes(selectedIDs, context.graph());
+         var coords = nodes.map(function (n) {
+           return n.loc;
+         });
+         var extent = utilTotalExtent(selectedIDs, context.graph());

 
 

-               d3_json(url)
-                   .then(function(result) {
-                       if (result && result.error) {
-                           throw new Error(result.error);
-                       } else if (!result || !result.query || !result.query.search) {
-                           throw new Error('No Results');
-                       }
-                       if (callback) {
-                           var titles = result.query.search.map(function(d) { return d.title; });
-                           callback(null, titles);
-                       }
-                   })
-                   .catch(function(err) {
-                       if (callback) { callback(err, []); }
-                   });
-           },
+         var operation = function operation() {
+           context.enter(modeMove(context, selectedIDs));
+         };

 
 

+         operation.available = function () {
+           return selectedIDs.length > 0;
+         };

 
 

-           suggestions: function(lang, query, callback) {
-               if (!query) {
-                   if (callback) { callback('', []); }
-                   return;
-               }
+         operation.disabled = function () {
+           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           } else if (selectedIDs.some(incompleteRelation)) {
+             return 'incomplete_relation';
+           }

 
 

-               lang = lang || 'en';
-               var url = endpoint.replace('en', lang) +
-                   utilQsString({
-                       action: 'opensearch',
-                       namespace: 0,
-                       suggest: '',
-                       format: 'json',
-                       origin: '*',
-                       search: query
-                   });
+           return false;

 
 

-               d3_json(url)
-                   .then(function(result) {
-                       if (result && result.error) {
-                           throw new Error(result.error);
-                       } else if (!result || result.length < 2) {
-                           throw new Error('No Results');
-                       }
-                       if (callback) { callback(null, result[1] || []); }
-                   })
-                   .catch(function(err) {
-                       if (callback) { callback(err.message, []); }
-                   });
-           },
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();

 
 

+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });

 
 

-           translations: function(lang, title, callback) {
-               if (!title) {
-                   if (callback) { callback('No Title'); }
-                   return;
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;

                }
                }

+             }

 
 

-               var url = endpoint.replace('en', lang) +
-                   utilQsString({
-                       action: 'query',
-                       prop: 'langlinks',
-                       format: 'json',
-                       origin: '*',
-                       lllimit: 500,
-                       titles: title
-                   });
+             return false;
+           }

 
 

-               d3_json(url)
-                   .then(function(result) {
-                       if (result && result.error) {
-                           throw new Error(result.error);
-                       } else if (!result || !result.query || !result.query.pages) {
-                           throw new Error('No Results');
-                       }
-                       if (callback) {
-                           var list = result.query.pages[Object.keys(result.query.pages)[0]];
-                           var translations = {};
-                           if (list && list.langlinks) {
-                               list.langlinks.forEach(function(d) { translations[d.lang] = d['*']; });
-                           }
-                           callback(null, translations);
-                       }
-                   })
-                   .catch(function(err) {
-                       if (callback) { callback(err.message); }
-                   });
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());

            }
            }

+         };

 
 

-       };
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.move.' + disable + '.' + multi) : _t('operations.move.description.' + multi);
+         };

 
 

-       var services = {
-           geocoder: serviceNominatim,
-           keepRight: serviceKeepRight,
-           improveOSM: serviceImproveOSM,
-           osmose: serviceOsmose,
-           mapillary: serviceMapillary,
-           openstreetcam: serviceOpenstreetcam,
-           osm: serviceOsm,
-           osmWikibase: serviceOsmWikibase,
-           maprules: serviceMapRules,
-           streetside: serviceStreetside,
-           taginfo: serviceTaginfo,
-           vectorTile: serviceVectorTile,
-           wikidata: serviceWikidata,
-           wikipedia: serviceWikipedia
-       };
+         operation.annotation = function () {
+           return selectedIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.move.annotation.feature', {
+             n: selectedIDs.length
+           });
+         };

 
 

-       function svgIcon(name, svgklass, useklass) {
-           return function drawIcon(selection) {
-               selection.selectAll('svg.icon' + (svgklass ? '.' + svgklass.split(' ')[0] : ''))
-                   .data([0])
-                   .enter()
-                   .append('svg')
-                   .attr('class', 'icon ' + (svgklass || ''))
-                   .append('use')
-                   .attr('xlink:href', name)
-                   .attr('class', useklass);
-           };
+         operation.id = 'move';
+         operation.keys = [_t('operations.move.key')];
+         operation.title = _t('operations.move.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         operation.mouseOnly = true;
+         return operation;

        }
 
        }
 

-       function uiNoteComments() {
-           var _note;
+       function modeRotate(context, entityIDs) {
+         var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeMove

 
 

+         var mode = {
+           id: 'rotate',
+           button: 'browse'
+         };
+         var keybinding = utilKeybinding('rotate');
+         var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationMove(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior];
+         var annotation = entityIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.rotate.annotation.feature', {
+           n: entityIDs.length
+         });

 
 

-           function noteComments(selection) {
-               if (_note.isNew()) { return; } // don't draw .comments-container
+         var _prevGraph;

 
 

-               var comments = selection.selectAll('.comments-container')
-                   .data([0]);
+         var _prevAngle;

 
 

-               comments = comments.enter()
-                   .append('div')
-                   .attr('class', 'comments-container')
-                   .merge(comments);
+         var _prevTransform;

 
 

-               var commentEnter = comments.selectAll('.comment')
-                   .data(_note.comments)
-                   .enter()
-                   .append('div')
-                   .attr('class', 'comment');
+         var _pivot; // use pointer events on supported platforms; fallback to mouse events

 
 

-               commentEnter
-                   .append('div')
-                   .attr('class', function(d) { return 'comment-avatar user-' + d.uid; })
-                   .call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));

 
 

-               var mainEnter = commentEnter
-                   .append('div')
-                   .attr('class', 'comment-main');
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

 
 

-               var metadataEnter = mainEnter
-                   .append('div')
-                   .attr('class', 'comment-metadata');
+         function doRotate(d3_event) {
+           var fn;

 
 

-               metadataEnter
-                   .append('div')
-                   .attr('class', 'comment-author')
-                   .each(function(d) {
-                       var selection = select(this);
-                       var osm = services.osm;
-                       if (osm && d.user) {
-                           selection = selection
-                               .append('a')
-                               .attr('class', 'comment-author-link')
-                               .attr('href', osm.userURL(d.user))
-                               .attr('tabindex', -1)
-                               .attr('target', '_blank');
-                       }
-                       selection
-                           .text(function(d) { return d.user || _t('note.anonymous'); });
-                   });
+           if (context.graph() !== _prevGraph) {
+             fn = context.perform;
+           } else {
+             fn = context.replace;
+           } // projection changed, recalculate _pivot

 
 

-               metadataEnter
-                   .append('div')
-                   .attr('class', 'comment-date')
-                   .text(function(d) {
-                       return _t('note.status.' + d.action, { when: localeDateString(d.date) });
-                   });

 
 

-               mainEnter
-                   .append('div')
-                   .attr('class', 'comment-text')
-                   .html(function(d) { return d.html; });
+           var projection = context.projection;
+           var currTransform = projection.transform();

 
 

-               comments
-                   .call(replaceAvatars);
+           if (!_prevTransform || currTransform.k !== _prevTransform.k || currTransform.x !== _prevTransform.x || currTransform.y !== _prevTransform.y) {
+             var nodes = utilGetAllNodes(entityIDs, context.graph());
+             var points = nodes.map(function (n) {
+               return projection(n.loc);
+             });
+             _pivot = getPivot(points);
+             _prevAngle = undefined;

            }
 
            }
 

+           var currMouse = context.map().mouse(d3_event);
+           var currAngle = Math.atan2(currMouse[1] - _pivot[1], currMouse[0] - _pivot[0]);
+           if (typeof _prevAngle === 'undefined') _prevAngle = currAngle;
+           var delta = currAngle - _prevAngle;
+           fn(actionRotate(entityIDs, _pivot, delta, projection));
+           _prevTransform = currTransform;
+           _prevAngle = currAngle;
+           _prevGraph = context.graph();
+         }

 
 

-           function replaceAvatars(selection) {
-               var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
-               var osm = services.osm;
-               if (showThirdPartyIcons !== 'true' || !osm) { return; }
-
-               var uids = {};  // gather uids in the comment thread
-               _note.comments.forEach(function(d) {
-                   if (d.uid) { uids[d.uid] = true; }
-               });
+         function getPivot(points) {
+           var _pivot;

 
 

-               Object.keys(uids).forEach(function(uid) {
-                   osm.loadUser(uid, function(err, user) {
-                       if (!user || !user.image_url) { return; }
+           if (points.length === 1) {
+             _pivot = points[0];
+           } else if (points.length === 2) {
+             _pivot = geoVecInterp(points[0], points[1], 0.5);
+           } else {
+             var polygonHull = d3_polygonHull(points);

 
 

-                       selection.selectAll('.comment-avatar.user-' + uid)
-                           .html('')
-                           .append('img')
-                           .attr('class', 'icon comment-avatar-icon')
-                           .attr('src', user.image_url)
-                           .attr('alt', user.display_name);
-                   });
-               });
+             if (polygonHull.length === 2) {
+               _pivot = geoVecInterp(points[0], points[1], 0.5);
+             } else {
+               _pivot = d3_polygonCentroid(d3_polygonHull(points));
+             }

            }
 
            }
 

+           return _pivot;
+         }

 
 

-           function localeDateString(s) {
-               if (!s) { return null; }
-               var options = { day: 'numeric', month: 'short', year: 'numeric' };
-               s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
-               var d = new Date(s);
-               if (isNaN(d.getTime())) { return null; }
-               return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-           }
+         function finish(d3_event) {
+           d3_event.stopPropagation();
+           context.replace(actionNoop(), annotation);
+           context.enter(modeSelect(context, entityIDs));
+         }

 
 

+         function cancel() {
+           if (_prevGraph) context.pop(); // remove the rotate

 
 

-           noteComments.note = function(val) {
-               if (!arguments.length) { return _note; }
-               _note = val;
-               return noteComments;
-           };
+           context.enter(modeSelect(context, entityIDs));
+         }

 
 

+         function undone() {
+           context.enter(modeBrowse(context));
+         }

 
 

-           return noteComments;
-       }
+         mode.enter = function () {
+           _prevGraph = null;
+           context.features().forceVisible(entityIDs);
+           behaviors.forEach(context.install);
+           var downEvent;
+           context.surface().on(_pointerPrefix + 'down.modeRotate', function (d3_event) {
+             downEvent = d3_event;
+           });
+           select(window).on(_pointerPrefix + 'move.modeRotate', doRotate, true).on(_pointerPrefix + 'up.modeRotate', function (d3_event) {
+             if (!downEvent) return;
+             var mapNode = context.container().select('.main-map').node();
+             var pointGetter = utilFastMouse(mapNode);
+             var p1 = pointGetter(downEvent);
+             var p2 = pointGetter(d3_event);
+             var dist = geoVecLength(p1, p2);
+             if (dist <= _tolerancePx) finish(d3_event);
+             downEvent = null;
+           }, true);
+           context.history().on('undone.modeRotate', undone);
+           keybinding.on('⎋', cancel).on('↩', finish);
+           select(document).call(keybinding);
+         };

 
 

-       function uiNoteHeader() {
-           var _note;
+         mode.exit = function () {
+           behaviors.forEach(context.uninstall);
+           context.surface().on(_pointerPrefix + 'down.modeRotate', null);
+           select(window).on(_pointerPrefix + 'move.modeRotate', null, true).on(_pointerPrefix + 'up.modeRotate', null, true);
+           context.history().on('undone.modeRotate', null);
+           select(document).call(keybinding.unbind);
+           context.features().forceVisible([]);
+         };

 
 

+         mode.selectedIDs = function () {
+           if (!arguments.length) return entityIDs; // no assign

 
 

-           function noteHeader(selection) {
-               var header = selection.selectAll('.note-header')
-                   .data(
-                       (_note ? [_note] : []),
-                       function(d) { return d.status + d.id; }
-                   );
+           return mode;
+         };

 
 

-               header.exit()
-                   .remove();
+         return mode;
+       }

 
 

-               var headerEnter = header.enter()
-                   .append('div')
-                   .attr('class', 'note-header');
+       function operationRotate(context, selectedIDs) {
+         var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+         var nodes = utilGetAllNodes(selectedIDs, context.graph());
+         var coords = nodes.map(function (n) {
+           return n.loc;
+         });
+         var extent = utilTotalExtent(selectedIDs, context.graph());

 
 

-               var iconEnter = headerEnter
-                   .append('div')
-                   .attr('class', function(d) { return 'note-header-icon ' + d.status; })
-                   .classed('new', function(d) { return d.id < 0; });
+         var operation = function operation() {
+           context.enter(modeRotate(context, selectedIDs));
+         };

 
 

-               iconEnter
-                   .append('div')
-                   .attr('class', 'preset-icon-28')
-                   .call(svgIcon('#iD-icon-note', 'note-fill'));
-
-               iconEnter.each(function(d) {
-                   var statusIcon = '#iD-icon-' + (d.id < 0 ? 'plus' : (d.status === 'open' ? 'close' : 'apply'));
-                   iconEnter
-                       .append('div')
-                       .attr('class', 'note-icon-annotation')
-                       .call(svgIcon(statusIcon, 'icon-annotation'));
-               });
+         operation.available = function () {
+           return nodes.length >= 2;
+         };

 
 

-               headerEnter
-                   .append('div')
-                   .attr('class', 'note-header-label')
-                   .text(function(d) {
-                       if (_note.isNew()) { return _t('note.new'); }
-                       return _t('note.note') + ' ' + d.id + ' ' +
-                           (d.status === 'closed' ? _t('note.closed') : '');
-                   });
+         operation.disabled = function () {
+           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           } else if (selectedIDs.some(incompleteRelation)) {
+             return 'incomplete_relation';

            }
 
            }
 

+           return false;

 
 

-           noteHeader.note = function(val) {
-               if (!arguments.length) { return _note; }
-               _note = val;
-               return noteHeader;
-           };
-
-
-           return noteHeader;
-       }
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();

 
 

-       function uiNoteReport() {
-           var _note;
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });

 
 

-           function noteReport(selection) {
-               var url;
-               if (services.osm && (_note instanceof osmNote) && (!_note.isNew())) {
-                   url = services.osm.noteReportURL(_note);
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;

                }
                }

+             }

 
 

-               var link = selection.selectAll('.note-report')
-                   .data(url ? [url] : []);
-
-               // exit
-               link.exit()
-                   .remove();
-
-               // enter
-               var linkEnter = link.enter()
-                   .append('a')
-                   .attr('class', 'note-report')
-                   .attr('target', '_blank')
-                   .attr('href', function(d) { return d; })
-                   .call(svgIcon('#iD-icon-out-link', 'inline'));
+             return false;
+           }

 
 

-               linkEnter
-                   .append('span')
-                   .text(_t('note.report'));
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());

            }
            }

+         };

 
 

+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.rotate.' + disable + '.' + multi) : _t('operations.rotate.description.' + multi);
+         };

 
 

-           noteReport.note = function(val) {
-               if (!arguments.length) { return _note; }
-               _note = val;
-               return noteReport;
-           };
+         operation.annotation = function () {
+           return selectedIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.rotate.annotation.feature', {
+             n: selectedIDs.length
+           });
+         };

 
 

-           return noteReport;
+         operation.id = 'rotate';
+         operation.keys = [_t('operations.rotate.key')];
+         operation.title = _t('operations.rotate.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         operation.mouseOnly = true;
+         return operation;

        }
 
        }
 

-       function uiViewOnOSM(context) {
-           var _what;   // an osmEntity or osmNote
+       function modeMove(context, entityIDs, baseGraph) {
+         var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeRotate

 
 

+         var mode = {
+           id: 'move',
+           button: 'browse'
+         };
+         var keybinding = utilKeybinding('move');
+         var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior, operationRotate(context, entityIDs).behavior];
+         var annotation = entityIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.move.annotation.feature', {
+           n: entityIDs.length
+         });

 
 

-           function viewOnOSM(selection) {
-               var url;
-               if (_what instanceof osmEntity) {
-                   url = context.connection().entityURL(_what);
-               } else if (_what instanceof osmNote) {
-                   url = context.connection().noteURL(_what);
-               }
+         var _prevGraph;

 
 

-               var data = ((!_what || _what.isNew()) ? [] : [_what]);
-               var link = selection.selectAll('.view-on-osm')
-                   .data(data, function(d) { return d.id; });
+         var _cache;

 
 

-               // exit
-               link.exit()
-                   .remove();
+         var _origin;

 
 

-               // enter
-               var linkEnter = link.enter()
-                   .append('a')
-                   .attr('class', 'view-on-osm')
-                   .attr('target', '_blank')
-                   .attr('href', url)
-                   .call(svgIcon('#iD-icon-out-link', 'inline'));
+         var _nudgeInterval; // use pointer events on supported platforms; fallback to mouse events

 
 

-               linkEnter
-                   .append('span')
-                   .text(_t('inspector.view_on_osm'));
-           }

 
 

+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

 
 

-           viewOnOSM.what = function(_) {
-               if (!arguments.length) { return _what; }
-               _what = _;
-               return viewOnOSM;
-           };
+         function doMove(nudge) {
+           nudge = nudge || [0, 0];
+           var fn;

 
 

-           return viewOnOSM;
-       }
+           if (_prevGraph !== context.graph()) {
+             _cache = {};
+             _origin = context.map().mouseCoordinates();
+             fn = context.perform;
+           } else {
+             fn = context.overwrite;
+           }

 
 

-       function uiNoteEditor(context) {
-           var dispatch$1 = dispatch('change');
-           var noteComments = uiNoteComments();
-           var noteHeader = uiNoteHeader();
+           var currMouse = context.map().mouse();
+           var origMouse = context.projection(_origin);
+           var delta = geoVecSubtract(geoVecSubtract(currMouse, origMouse), nudge);
+           fn(actionMove(entityIDs, delta, context.projection, _cache));
+           _prevGraph = context.graph();
+         }
+
+         function startNudge(nudge) {
+           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+           _nudgeInterval = window.setInterval(function () {
+             context.map().pan(nudge);
+             doMove(nudge);
+           }, 50);
+         }
+
+         function stopNudge() {
+           if (_nudgeInterval) {
+             window.clearInterval(_nudgeInterval);
+             _nudgeInterval = null;
+           }
+         }

 
 

-           // var formFields = uiFormFields(context);
+         function move() {
+           doMove();
+           var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());

 
 

-           var _note;
-           var _newNote;
-           // var _fieldsArr;
+           if (nudge) {
+             startNudge(nudge);
+           } else {
+             stopNudge();
+           }
+         }

 
 

+         function finish(d3_event) {
+           d3_event.stopPropagation();
+           context.replace(actionNoop(), annotation);
+           context.enter(modeSelect(context, entityIDs));
+           stopNudge();
+         }

 
 

-           function noteEditor(selection) {
+         function cancel() {
+           if (baseGraph) {
+             while (context.graph() !== baseGraph) {
+               context.pop();
+             } // reset to baseGraph

 
 

-               var header = selection.selectAll('.header')
-                   .data([0]);

 
 

-               var headerEnter = header.enter()
-                   .append('div')
-                   .attr('class', 'header fillL');
+             context.enter(modeBrowse(context));
+           } else {
+             if (_prevGraph) context.pop(); // remove the move

 
 

-               headerEnter
-                   .append('button')
-                   .attr('class', 'close')
-                   .on('click', function() {
-                       context.enter(modeBrowse(context));
-                   })
-                   .call(svgIcon('#iD-icon-close'));
+             context.enter(modeSelect(context, entityIDs));
+           }

 
 

-               headerEnter
-                   .append('h3')
-                   .text(_t('note.title'));
+           stopNudge();
+         }

 
 

+         function undone() {
+           context.enter(modeBrowse(context));
+         }

 
 

-               var body = selection.selectAll('.body')
-                   .data([0]);
+         mode.enter = function () {
+           _origin = context.map().mouseCoordinates();
+           _prevGraph = null;
+           _cache = {};
+           context.features().forceVisible(entityIDs);
+           behaviors.forEach(context.install);
+           var downEvent;
+           context.surface().on(_pointerPrefix + 'down.modeMove', function (d3_event) {
+             downEvent = d3_event;
+           });
+           select(window).on(_pointerPrefix + 'move.modeMove', move, true).on(_pointerPrefix + 'up.modeMove', function (d3_event) {
+             if (!downEvent) return;
+             var mapNode = context.container().select('.main-map').node();
+             var pointGetter = utilFastMouse(mapNode);
+             var p1 = pointGetter(downEvent);
+             var p2 = pointGetter(d3_event);
+             var dist = geoVecLength(p1, p2);
+             if (dist <= _tolerancePx) finish(d3_event);
+             downEvent = null;
+           }, true);
+           context.history().on('undone.modeMove', undone);
+           keybinding.on('⎋', cancel).on('↩', finish);
+           select(document).call(keybinding);
+         };

 
 

-               body = body.enter()
-                   .append('div')
-                   .attr('class', 'body')
-                   .merge(body);
+         mode.exit = function () {
+           stopNudge();
+           behaviors.forEach(function (behavior) {
+             context.uninstall(behavior);
+           });
+           context.surface().on(_pointerPrefix + 'down.modeMove', null);
+           select(window).on(_pointerPrefix + 'move.modeMove', null, true).on(_pointerPrefix + 'up.modeMove', null, true);
+           context.history().on('undone.modeMove', null);
+           select(document).call(keybinding.unbind);
+           context.features().forceVisible([]);
+         };

 
 

-               var editor = body.selectAll('.note-editor')
-                   .data([0]);
+         mode.selectedIDs = function () {
+           if (!arguments.length) return entityIDs; // no assign

 
 

-               editor.enter()
-                   .append('div')
-                   .attr('class', 'modal-section note-editor')
-                   .merge(editor)
-                   .call(noteHeader.note(_note))
-                   .call(noteComments.note(_note))
-                   .call(noteSaveSection);
+           return mode;
+         };

 
 

-               var footer = selection.selectAll('.footer')
-                   .data([0]);
+         return mode;
+       }

 
 

-               footer.enter()
-                   .append('div')
-                   .attr('class', 'footer')
-                   .merge(footer)
-                   .call(uiViewOnOSM(context).what(_note))
-                   .call(uiNoteReport().note(_note));
+       function behaviorPaste(context) {
+         function doPaste(d3_event) {
+           // prevent paste during low zoom selection
+           if (!context.map().withinEditableZoom()) return;
+           d3_event.preventDefault();
+           var baseGraph = context.graph();
+           var mouse = context.map().mouse();
+           var projection = context.projection;
+           var viewport = geoExtent(projection.clipExtent()).polygon();
+           if (!geoPointInPolygon(mouse, viewport)) return;
+           var oldIDs = context.copyIDs();
+           if (!oldIDs.length) return;
+           var extent = geoExtent();
+           var oldGraph = context.copyGraph();
+           var newIDs = [];
+           var action = actionCopyEntities(oldIDs, oldGraph);
+           context.perform(action);
+           var copies = action.copies();
+           var originals = new Set();
+           Object.values(copies).forEach(function (entity) {
+             originals.add(entity.id);
+           });

 
 

+           for (var id in copies) {
+             var oldEntity = oldGraph.entity(id);
+             var newEntity = copies[id];

 
 

-               // rerender the note editor on any auth change
-               var osm = services.osm;
-               if (osm) {
-                   osm.on('change.note-save', function() {
-                       selection.call(noteEditor);
-                   });
-               }
-           }
+             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.

 
 
 
 

-           function noteSaveSection(selection) {
-               var isSelected = (_note && _note.id === context.selectedNoteID());
-               var noteSave = selection.selectAll('.note-save')
-                   .data((isSelected ? [_note] : []), function(d) { return d.status + d.id; });
+             var parents = context.graph().parentWays(newEntity);
+             var parentCopied = parents.some(function (parent) {
+               return originals.has(parent.id);
+             });

 
 

-               // exit
-               noteSave.exit()
-                   .remove();
+             if (!parentCopied) {
+               newIDs.push(newEntity.id);
+             }
+           } // Put pasted objects where mouse pointer is..

 
 

-               // enter
-               var noteSaveEnter = noteSave.enter()
-                   .append('div')
-                   .attr('class', 'note-save save-section cf');
-
-               // // if new note, show categories to pick from
-               // if (_note.isNew()) {
-               //     var presets = presetManager;
-
-               //     // NOTE: this key isn't a age and therefore there is no documentation (yet)
-               //     _fieldsArr = [
-               //         uiField(context, presets.field('category'), null, { show: true, revert: false }),
-               //     ];
-
-               //     _fieldsArr.forEach(function(field) {
-               //         field
-               //             .on('change', changeCategory);
-               //     });
-
-               //     noteSaveEnter
-               //         .append('div')
-               //         .attr('class', 'note-category')
-               //         .call(formFields.fieldsArr(_fieldsArr));
-               // }
-
-               // function changeCategory() {
-               //     // NOTE: perhaps there is a better way to get value
-               //     var val = context.container().select('input[name=\'category\']:checked').property('__data__') || undefined;
-
-               //     // store the unsaved category with the note itself
-               //     _note = _note.update({ newCategory: val });
-               //     var osm = services.osm;
-               //     if (osm) {
-               //         osm.replaceNote(_note);  // update note cache
-               //     }
-               //     noteSave
-               //         .call(noteSaveButtons);
-               // }
-
-               noteSaveEnter
-                   .append('h4')
-                   .attr('class', '.note-save-header')
-                   .text(function() {
-                       return _note.isNew() ? _t('note.newDescription') : _t('note.newComment');
-                   });

 
 

-               var commentTextarea = noteSaveEnter
-                   .append('textarea')
-                   .attr('class', 'new-comment-input')
-                   .attr('placeholder', _t('note.inputPlaceholder'))
-                   .attr('maxlength', 1000)
-                   .property('value', function(d) { return d.newComment; })
-                   .call(utilNoAuto)
-                   .on('keydown.note-input', keydown)
-                   .on('input.note-input', changeInput)
-                   .on('blur.note-input', changeInput);
+           var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
+           var delta = geoVecSubtract(mouse, copyPoint);
+           context.perform(actionMove(newIDs, delta, projection));
+           context.enter(modeMove(context, newIDs, baseGraph));
+         }

 
 

-               if (_newNote) {
-                   // autofocus the comment field for new notes
-                   commentTextarea.node().focus();
-               }
+         function behavior() {
+           context.keybinding().on(uiCmd('⌘V'), doPaste);
+           return behavior;
+         }

 
 

-               // update
-               noteSave = noteSaveEnter
-                   .merge(noteSave)
-                   .call(userDetails)
-                   .call(noteSaveButtons);
+         behavior.off = function () {
+           context.keybinding().off(uiCmd('⌘V'));
+         };

 
 

+         return behavior;
+       }

 
 

-               // fast submit if user presses cmd+enter
-               function keydown() {
-                   if (!(event.keyCode === 13 && event.metaKey)) { return; }
+       var $$5 = _export;
+       var repeat = stringRepeat;

 
 

-                   var osm = services.osm;
-                   if (!osm) { return; }
+       // `String.prototype.repeat` method
+       // https://tc39.es/ecma262/#sec-string.prototype.repeat
+       $$5({ target: 'String', proto: true }, {
+         repeat: repeat
+       });

 
 

-                   var hasAuth = osm.authenticated();
-                   if (!hasAuth) { return; }
+       /*
+           `behaviorDrag` is like `d3_behavior.drag`, with the following differences:

 
 

-                   if (!_note.newComment) { return; }
+           * The `origin` function is expected to return an [x, y] tuple rather than an
+             {x, y} object.
+           * The events are `start`, `move`, and `end`.
+             (https://github.com/mbostock/d3/issues/563)
+           * The `start` event is not dispatched until the first cursor movement occurs.
+             (https://github.com/mbostock/d3/pull/368)
+           * The `move` event has a `point` and `delta` [x, y] tuple properties rather
+             than `x`, `y`, `dx`, and `dy` properties.
+           * The `end` event is not dispatched if no movement occurs.
+           * An `off` function is available that unbinds the drag's internal event handlers.
+        */

 
 

-                   event.preventDefault();
+       function behaviorDrag() {
+         var dispatch = dispatch$8('start', 'move', 'end'); // see also behaviorSelect

 
 

-                   select(this)
-                       .on('keydown.note-input', null);
+         var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping

 
 

-                   // focus on button and submit
-                   window.setTimeout(function() {
-                       if (_note.isNew()) {
-                           noteSave.selectAll('.save-button').node().focus();
-                           clickSave(_note);
-                       } else  {
-                           noteSave.selectAll('.comment-button').node().focus();
-                           clickComment(_note);
-                       }
-                   }, 10);
-               }
+         var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981

 
 

+         var _origin = null;
+         var _selector = '';

 
 

-               function changeInput() {
-                   var input = select(this);
-                   var val = input.property('value').trim() || undefined;
+         var _targetNode;

 
 

-                   // store the unsaved comment with the note itself
-                   _note = _note.update({ newComment: val });
+         var _targetEntity;

 
 

-                   var osm = services.osm;
-                   if (osm) {
-                       osm.replaceNote(_note);  // update note cache
-                   }
+         var _surface;

 
 

-                   noteSave
-                       .call(noteSaveButtons);
-               }
-           }
+         var _pointerId; // use pointer events on supported platforms; fallback to mouse events

 
 
 
 

-           function userDetails(selection) {
-               var detailSection = selection.selectAll('.detail-section')
-                   .data([0]);
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

 
 

-               detailSection = detailSection.enter()
-                   .append('div')
-                   .attr('class', 'detail-section')
-                   .merge(detailSection);
+         var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');

 
 

-               var osm = services.osm;
-               if (!osm) { return; }
-
-               // Add warning if user is not logged in
-               var hasAuth = osm.authenticated();
-               var authWarning = detailSection.selectAll('.auth-warning')
-                   .data(hasAuth ? [] : [0]);
-
-               authWarning.exit()
-                   .transition()
-                   .duration(200)
-                   .style('opacity', 0)
-                   .remove();
-
-               var authEnter = authWarning.enter()
-                   .insert('div', '.tag-reference-body')
-                   .attr('class', 'field-warning auth-warning')
-                   .style('opacity', 0);
-
-               authEnter
-                   .call(svgIcon('#iD-icon-alert', 'inline'));
-
-               authEnter
-                   .append('span')
-                   .text(_t('note.login'));
-
-               authEnter
-                   .append('a')
-                   .attr('target', '_blank')
-                   .call(svgIcon('#iD-icon-out-link', 'inline'))
-                   .append('span')
-                   .text(_t('login'))
-                   .on('click.note-login', function() {
-                       event.preventDefault();
-                       osm.authenticate();
-                   });
+         var d3_event_userSelectSuppress = function d3_event_userSelectSuppress() {
+           var selection$1 = selection();
+           var select = selection$1.style(d3_event_userSelectProperty);
+           selection$1.style(d3_event_userSelectProperty, 'none');
+           return function () {
+             selection$1.style(d3_event_userSelectProperty, select);
+           };
+         };

 
 

-               authEnter
-                   .transition()
-                   .duration(200)
-                   .style('opacity', 1);
+         function pointerdown(d3_event) {
+           if (_pointerId) return;
+           _pointerId = d3_event.pointerId || 'mouse';
+           _targetNode = this; // only force reflow once per drag

 
 

+           var pointerLocGetter = utilFastMouse(_surface || _targetNode.parentNode);
+           var offset;
+           var startOrigin = pointerLocGetter(d3_event);
+           var started = false;
+           var selectEnable = d3_event_userSelectSuppress();
+           select(window).on(_pointerPrefix + 'move.drag', pointermove).on(_pointerPrefix + 'up.drag pointercancel.drag', pointerup, true);

 
 

-               var prose = detailSection.selectAll('.note-save-prose')
-                   .data(hasAuth ? [0] : []);
+           if (_origin) {
+             offset = _origin.call(_targetNode, _targetEntity);
+             offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
+           } else {
+             offset = [0, 0];
+           }

 
 

-               prose.exit()
-                   .remove();
+           d3_event.stopPropagation();

 
 

-               prose = prose.enter()
-                   .append('p')
-                   .attr('class', 'note-save-prose')
-                   .text(_t('note.upload_explanation'))
-                   .merge(prose);
+           function pointermove(d3_event) {
+             if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+             var p = pointerLocGetter(d3_event);

 
 

-               osm.userDetails(function(err, user) {
-                   if (err) { return; }
+             if (!started) {
+               var dist = geoVecLength(startOrigin, p);
+               var tolerance = d3_event.pointerType === 'pen' ? _penTolerancePx : _tolerancePx; // don't start until the drag has actually moved somewhat

 
 

-                   var userLink = select(document.createElement('div'));
+               if (dist < tolerance) return;
+               started = true;
+               dispatch.call('start', this, d3_event, _targetEntity); // Don't send a `move` event in the same cycle as `start` since dragging
+               // a midpoint will convert the target to a node.
+             } else {
+               startOrigin = p;
+               d3_event.stopPropagation();
+               d3_event.preventDefault();
+               var dx = p[0] - startOrigin[0];
+               var dy = p[1] - startOrigin[1];
+               dispatch.call('move', this, d3_event, _targetEntity, [p[0] + offset[0], p[1] + offset[1]], [dx, dy]);
+             }
+           }

 
 

-                   if (user.image_url) {
-                       userLink
-                           .append('img')
-                           .attr('src', user.image_url)
-                           .attr('class', 'icon pre-text user-icon');
-                   }
+           function pointerup(d3_event) {
+             if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+             _pointerId = null;

 
 

-                   userLink
-                       .append('a')
-                       .attr('class', 'user-info')
-                       .text(user.display_name)
-                       .attr('href', osm.userURL(user.display_name))
-                       .attr('tabindex', -1)
-                       .attr('target', '_blank');
+             if (started) {
+               dispatch.call('end', this, d3_event, _targetEntity);
+               d3_event.preventDefault();
+             }

 
 

-                   prose
-                       .html(_t('note.upload_explanation_with_user', { user: userLink.html() }));
-               });
+             select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+             selectEnable();

            }
            }

+         }

 
 

+         function behavior(selection) {
+           var matchesSelector = utilPrefixDOMProperty('matchesSelector');
+           var delegate = pointerdown;

 
 

-           function noteSaveButtons(selection) {
-               var osm = services.osm;
-               var hasAuth = osm && osm.authenticated();
+           if (_selector) {
+             delegate = function delegate(d3_event) {
+               var root = this;
+               var target = d3_event.target;

 
 

-               var isSelected = (_note && _note.id === context.selectedNoteID());
-               var buttonSection = selection.selectAll('.buttons')
-                   .data((isSelected ? [_note] : []), function(d) { return d.status + d.id; });
+               for (; target && target !== root; target = target.parentNode) {
+                 var datum = target.__data__;
+                 _targetEntity = datum instanceof osmNote ? datum : datum && datum.properties && datum.properties.entity;

 
 

-               // exit
-               buttonSection.exit()
-                   .remove();
+                 if (_targetEntity && target[matchesSelector](_selector)) {
+                   return pointerdown.call(target, d3_event);
+                 }
+               }
+             };
+           }

 
 

-               // enter
-               var buttonEnter = buttonSection.enter()
-                   .append('div')
-                   .attr('class', 'buttons');
+           selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
+         }

 
 

-               if (_note.isNew()) {
-                   buttonEnter
-                       .append('button')
-                       .attr('class', 'button cancel-button secondary-action')
-                       .text(_t('confirm.cancel'));
+         behavior.off = function (selection) {
+           selection.on(_pointerPrefix + 'down.drag' + _selector, null);
+         };

 
 

-                   buttonEnter
-                       .append('button')
-                       .attr('class', 'button save-button action')
-                       .text(_t('note.save'));
+         behavior.selector = function (_) {
+           if (!arguments.length) return _selector;
+           _selector = _;
+           return behavior;
+         };

 
 

-               } else {
-                   buttonEnter
-                       .append('button')
-                       .attr('class', 'button status-button action');
+         behavior.origin = function (_) {
+           if (!arguments.length) return _origin;
+           _origin = _;
+           return behavior;
+         };

 
 

-                   buttonEnter
-                       .append('button')
-                       .attr('class', 'button comment-button action')
-                       .text(_t('note.comment'));
-               }
+         behavior.cancel = function () {
+           select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+           return behavior;
+         };
+
+         behavior.targetNode = function (_) {
+           if (!arguments.length) return _targetNode;
+           _targetNode = _;
+           return behavior;
+         };

 
 

+         behavior.targetEntity = function (_) {
+           if (!arguments.length) return _targetEntity;
+           _targetEntity = _;
+           return behavior;
+         };

 
 

-               // update
-               buttonSection = buttonSection
-                   .merge(buttonEnter);
+         behavior.surface = function (_) {
+           if (!arguments.length) return _surface;
+           _surface = _;
+           return behavior;
+         };

 
 

-               buttonSection.select('.cancel-button')   // select and propagate data
-                   .on('click.cancel', clickCancel);
+         return utilRebind(behavior, dispatch, 'on');
+       }

 
 

-               buttonSection.select('.save-button')     // select and propagate data
-                   .attr('disabled', isSaveDisabled)
-                   .on('click.save', clickSave);
+       function modeDragNode(context) {
+         var mode = {
+           id: 'drag-node',
+           button: 'browse'
+         };
+         var hover = behaviorHover(context).altDisables(true).on('hover', context.ui().sidebar.hover);
+         var edit = behaviorEdit(context);

 
 

-               buttonSection.select('.status-button')   // select and propagate data
-                   .attr('disabled', (hasAuth ? null : true))
-                   .text(function(d) {
-                       var action = (d.status === 'open' ? 'close' : 'open');
-                       var andComment = (d.newComment ? '_comment' : '');
-                       return _t('note.' + action + andComment);
-                   })
-                   .on('click.status', clickStatus);
+         var _nudgeInterval;

 
 

-               buttonSection.select('.comment-button')   // select and propagate data
-                   .attr('disabled', isSaveDisabled)
-                   .on('click.comment', clickComment);
+         var _restoreSelectedIDs = [];
+         var _wasMidpoint = false;
+         var _isCancelled = false;

 
 

+         var _activeEntity;

 
 

-               function isSaveDisabled(d) {
-                   return (hasAuth && d.status === 'open' && d.newComment) ? null : true;
-               }
-           }
+         var _startLoc;

 
 

+         var _lastLoc;

 
 

+         function startNudge(d3_event, entity, nudge) {
+           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+           _nudgeInterval = window.setInterval(function () {
+             context.map().pan(nudge);
+             doMove(d3_event, entity, nudge);
+           }, 50);
+         }

 
 

-           function clickCancel(d) {
-               this.blur();    // avoid keeping focus on the button - #4641
-               var osm = services.osm;
-               if (osm) {
-                   osm.removeNote(d);
-               }
-               context.enter(modeBrowse(context));
-               dispatch$1.call('change');
+         function stopNudge() {
+           if (_nudgeInterval) {
+             window.clearInterval(_nudgeInterval);
+             _nudgeInterval = null;

            }
            }

+         }

 
 

+         function moveAnnotation(entity) {
+           return _t('operations.move.annotation.' + entity.geometry(context.graph()));
+         }

 
 

-           function clickSave(d) {
-               this.blur();    // avoid keeping focus on the button - #4641
-               var osm = services.osm;
-               if (osm) {
-                   osm.postNoteCreate(d, function(err, note) {
-                       dispatch$1.call('change', note);
-                   });
-               }
-           }
+         function connectAnnotation(nodeEntity, targetEntity) {
+           var nodeGeometry = nodeEntity.geometry(context.graph());
+           var targetGeometry = targetEntity.geometry(context.graph());

 
 

+           if (nodeGeometry === 'vertex' && targetGeometry === 'vertex') {
+             var nodeParentWayIDs = context.graph().parentWays(nodeEntity);
+             var targetParentWayIDs = context.graph().parentWays(targetEntity);
+             var sharedParentWays = utilArrayIntersection(nodeParentWayIDs, targetParentWayIDs); // if both vertices are part of the same way

 
 

-           function clickStatus(d) {
-               this.blur();    // avoid keeping focus on the button - #4641
-               var osm = services.osm;
-               if (osm) {
-                   var setStatus = (d.status === 'open' ? 'closed' : 'open');
-                   osm.postNoteUpdate(d, setStatus, function(err, note) {
-                       dispatch$1.call('change', note);
-                   });
+             if (sharedParentWays.length !== 0) {
+               // if the nodes are next to each other, they are merged
+               if (sharedParentWays[0].areAdjacent(nodeEntity.id, targetEntity.id)) {
+                 return _t('operations.connect.annotation.from_vertex.to_adjacent_vertex');

                }
                }

-           }

 
 

-           function clickComment(d) {
-               this.blur();    // avoid keeping focus on the button - #4641
-               var osm = services.osm;
-               if (osm) {
-                   osm.postNoteUpdate(d, d.status, function(err, note) {
-                       dispatch$1.call('change', note);
-                   });
-               }
+               return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
+             }

            }
 
            }
 

+           return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
+         }

 
 

-           noteEditor.note = function(val) {
-               if (!arguments.length) { return _note; }
-               _note = val;
-               return noteEditor;
-           };
-
-           noteEditor.newNote = function(val) {
-               if (!arguments.length) { return _newNote; }
-               _newNote = val;
-               return noteEditor;
-           };
+         function shouldSnapToNode(target) {
+           if (!_activeEntity) return false;
+           return _activeEntity.geometry(context.graph()) !== 'vertex' || target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph());
+         }

 
 

+         function origin(entity) {
+           return context.projection(entity.loc);
+         }

 
 

-           return utilRebind(noteEditor, dispatch$1, 'on');
-       }
+         function keydown(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope')) {
+               context.surface().classed('nope-suppressed', true);
+             }

 
 

-       function modeSelectNote(context, selectedNoteID) {
-           var mode = {
-               id: 'select-note',
-               button: 'browse'
-           };
+             context.surface().classed('nope', false).classed('nope-disabled', true);
+           }
+         }

 
 

-           var _keybinding = utilKeybinding('select-note');
-           var _noteEditor = uiNoteEditor(context)
-               .on('change', function() {
-                   context.map().pan([0,0]);  // trigger a redraw
-                   var note = checkSelectedID();
-                   if (!note) { return; }
-                   context.ui().sidebar
-                       .show(_noteEditor.note(note));
-               });
+         function keyup(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope-suppressed')) {
+               context.surface().classed('nope', true);
+             }

 
 

-           var _behaviors = [
-               behaviorBreathe(),
-               behaviorHover(context),
-               behaviorSelect(context),
-               behaviorLasso(context),
-               modeDragNode(context).behavior,
-               modeDragNote(context).behavior
-           ];
+             context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+           }
+         }

 
 

-           var _newFeature = false;
+         function start(d3_event, entity) {
+           _wasMidpoint = entity.type === 'midpoint';
+           var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
+           _isCancelled = !context.editable() || d3_event.shiftKey || hasHidden;

 
 

+           if (_isCancelled) {
+             if (hasHidden) {
+               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
+             }

 
 

-           function checkSelectedID() {
-               if (!services.osm) { return; }
-               var note = services.osm.getNote(selectedNoteID);
-               if (!note) {
-                   context.enter(modeBrowse(context));
-               }
-               return note;
+             return drag.cancel();

            }
 
            }
 

+           if (_wasMidpoint) {
+             var midpoint = entity;
+             entity = osmNode();
+             context.perform(actionAddMidpoint(midpoint, entity));
+             entity = context.entity(entity.id); // get post-action entity

 
 

-           // class the note as selected, or return to browse mode if the note is gone
-           function selectNote(drawn) {
-               if (!checkSelectedID()) { return; }
+             var vertex = context.surface().selectAll('.' + entity.id);
+             drag.targetNode(vertex.node()).targetEntity(entity);
+           } else {
+             context.perform(actionNoop());
+           }

 
 

-               var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
+           _activeEntity = entity;
+           _startLoc = entity.loc;
+           hover.ignoreVertex(entity.geometry(context.graph()) === 'vertex');
+           context.surface().selectAll('.' + _activeEntity.id).classed('active', true);
+           context.enter(mode);
+         } // related code
+         // - `behavior/draw.js` `datum()`

 
 

-               if (selection.empty()) {
-                   // Return to browse mode if selected DOM elements have
-                   // disappeared because the user moved them out of view..
-                   var source = event && event.type === 'zoom' && event.sourceEvent;
-                   if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-                       context.enter(modeBrowse(context));
-                   }

 
 

-               } else {
-                   selection
-                       .classed('selected', true);
+         function datum(d3_event) {
+           if (!d3_event || d3_event.altKey) {
+             return {};
+           } else {
+             // When dragging, snap only to touch targets..
+             // (this excludes area fills and active drawing elements)
+             var d = d3_event.target.__data__;
+             return d && d.properties && d.properties.target ? d : {};
+           }
+         }
+
+         function doMove(d3_event, entity, nudge) {
+           nudge = nudge || [0, 0];
+           var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
+           var currMouse = geoVecSubtract(currPoint, nudge);
+           var loc = context.projection.invert(currMouse);
+           var target, edge;
+
+           if (!_nudgeInterval) {
+             // If not nudging at the edge of the viewport, try to snap..
+             // related code
+             // - `mode/drag_node.js`     `doMove()`
+             // - `behavior/draw.js`      `click()`
+             // - `behavior/draw_way.js`  `move()`
+             var d = datum(d3_event);
+             target = d && d.properties && d.properties.entity;
+             var targetLoc = target && target.loc;
+             var targetNodes = d && d.properties && d.properties.nodes;
+
+             if (targetLoc) {
+               // snap to node/vertex - a point target with `.loc`
+               if (shouldSnapToNode(target)) {
+                 loc = targetLoc;
+               }
+             } else if (targetNodes) {
+               // snap to way - a line target with `.nodes`
+               edge = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, end.id);

 
 

-                   context.selectedNoteID(selectedNoteID);
+               if (edge) {
+                 loc = edge.loc;

                }
                }

+             }

            }
 
            }
 

+           context.replace(actionMoveNode(entity.id, loc)); // Below here: validations

 
 

-           function esc() {
-               if (context.container().select('.combobox').size()) { return; }
-               context.enter(modeBrowse(context));
-           }
-
-
-           mode.zoomToSelected = function() {
-               if (!services.osm) { return; }
-               var note = services.osm.getNote(selectedNoteID);
-               if (note) {
-                   context.map().centerZoomEase(note.loc, 20);
-               }
-           };
+           var isInvalid = false; // Check if this connection to `target` could cause relations to break..

 
 

+           if (target) {
+             isInvalid = hasRelationConflict(entity, target, edge, context.graph());
+           } // Check if this drag causes the geometry to break..

 
 

-           mode.newFeature = function(val) {
-               if (!arguments.length) { return _newFeature; }
-               _newFeature = val;
-               return mode;
-           };

 
 

+           if (!isInvalid) {
+             isInvalid = hasInvalidGeometry(entity, context.graph());
+           }

 
 

-           mode.enter = function() {
-               var note = checkSelectedID();
-               if (!note) { return; }
+           var nope = context.surface().classed('nope');

 
 

-               _behaviors.forEach(context.install);
+           if (isInvalid === 'relation' || isInvalid === 'restriction') {
+             if (!nope) {
+               // about to nope - show hint
+               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('operations.connect.' + isInvalid, {
+                 relation: _mainPresetIndex.item('type/restriction').name()
+               }))();
+             }
+           } else if (isInvalid) {
+             var errorID = isInvalid === 'line' ? 'lines' : 'areas';
+             context.ui().flash.duration(3000).iconName('#iD-icon-no').label(_t('self_intersection.error.' + errorID))();
+           } else {
+             if (nope) {
+               // about to un-nope, remove hint
+               context.ui().flash.duration(1).label('')();
+             }
+           }

 
 

-               _keybinding
-                   .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-                   .on('⎋', esc, true);
+           var nopeDisabled = context.surface().classed('nope-disabled');

 
 

-               select(document)
-                   .call(_keybinding);
+           if (nopeDisabled) {
+             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+           } else {
+             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+           }

 
 

-               selectNote();
+           _lastLoc = loc;
+         } // Uses `actionConnect.disabled()` to know whether this connection is ok..

 
 

-               var sidebar = context.ui().sidebar;
-               sidebar.show(_noteEditor.note(note).newNote(_newFeature));

 
 

-               // expand the sidebar, avoid obscuring the note if needed
-               sidebar.expand(sidebar.intersects(note.extent()));
+         function hasRelationConflict(entity, target, edge, graph) {
+           var testGraph = graph.update(); // copy
+           // if snapping to way - add midpoint there and consider that the target..

 
 

-               context.map()
-                   .on('drawn.select', selectNote);
-           };
+           if (edge) {
+             var midpoint = osmNode();
+             var action = actionAddMidpoint({
+               loc: edge.loc,
+               edge: [target.nodes[edge.index - 1], target.nodes[edge.index]]
+             }, midpoint);
+             testGraph = action(testGraph);
+             target = midpoint;
+           } // can we connect to it?

 
 
 
 

-           mode.exit = function() {
-               _behaviors.forEach(context.uninstall);
+           var ids = [entity.id, target.id];
+           return actionConnect(ids).disabled(testGraph);
+         }

 
 

-               select(document)
-                   .call(_keybinding.unbind);
+         function hasInvalidGeometry(entity, graph) {
+           var parents = graph.parentWays(entity);
+           var i, j, k;

 
 

-               context.surface()
-                   .selectAll('.layer-notes .selected')
-                   .classed('selected hover', false);
+           for (i = 0; i < parents.length; i++) {
+             var parent = parents[i];
+             var nodes = [];
+             var activeIndex = null; // which multipolygon ring contains node being dragged
+             // test any parent multipolygons for valid geometry

 
 

-               context.map()
-                   .on('drawn.select', null);
+             var relations = graph.parentRelations(parent);

 
 

-               context.ui().sidebar
-                   .hide();
+             for (j = 0; j < relations.length; j++) {
+               if (!relations[j].isMultipolygon()) continue;
+               var rings = osmJoinWays(relations[j].members, graph); // find active ring and test it for self intersections

 
 

-               context.selectedNoteID(null);
-           };
+               for (k = 0; k < rings.length; k++) {
+                 nodes = rings[k].nodes;

 
 

+                 if (nodes.find(function (n) {
+                   return n.id === entity.id;
+                 })) {
+                   activeIndex = k;

 
 

-           return mode;
-       }
+                   if (geoHasSelfIntersections(nodes, entity.id)) {
+                     return 'multipolygonMember';
+                   }
+                 }

 
 

-       function modeDragNote(context) {
-           var mode = {
-               id: 'drag-note',
-               button: 'browse'
-           };
+                 rings[k].coords = nodes.map(function (n) {
+                   return n.loc;
+                 });
+               } // test active ring for intersections with other rings in the multipolygon

 
 

-           var edit = behaviorEdit(context);

 
 

-           var _nudgeInterval;
-           var _lastLoc;
-           var _note;    // most current note.. dragged note may have stale datum.
+               for (k = 0; k < rings.length; k++) {
+                 if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings

 
 

+                 if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
+                   return 'multipolygonRing';
+                 }
+               }
+             } // If we still haven't tested this node's parent way for self-intersections.
+             // (because it's not a member of a multipolygon), test it now.

 
 

-           function startNudge(nudge) {
-               if (_nudgeInterval) { window.clearInterval(_nudgeInterval); }
-               _nudgeInterval = window.setInterval(function() {
-                   context.map().pan(nudge);
-                   doMove(nudge);
-               }, 50);
-           }

 
 

+             if (activeIndex === null) {
+               nodes = parent.nodes.map(function (nodeID) {
+                 return graph.entity(nodeID);
+               });

 
 

-           function stopNudge() {
-               if (_nudgeInterval) {
-                   window.clearInterval(_nudgeInterval);
-                   _nudgeInterval = null;
+               if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
+                 return parent.geometry(graph);

                }
                }

+             }

            }
 
            }
 

+           return false;
+         }

 
 

-           function origin(note) {
-               return context.projection(note.loc);
-           }
-
+         function move(d3_event, entity, point) {
+           if (_isCancelled) return;
+           d3_event.stopPropagation();
+           context.surface().classed('nope-disabled', d3_event.altKey);
+           _lastLoc = context.projection.invert(point);
+           doMove(d3_event, entity);
+           var nudge = geoViewportEdge(point, context.map().dimensions());

 
 

-           function start(note) {
-               _note = note;
-               var osm = services.osm;
-               if (osm) {
-                   // Get latest note from cache.. The marker may have a stale datum bound to it
-                   // and dragging it around can sometimes delete the users note comment.
-                   _note = osm.getNote(_note.id);
-               }
+           if (nudge) {
+             startNudge(d3_event, entity, nudge);
+           } else {
+             stopNudge();
+           }
+         }
+
+         function end(d3_event, entity) {
+           if (_isCancelled) return;
+           var wasPoint = entity.geometry(context.graph()) === 'point';
+           var d = datum(d3_event);
+           var nope = d && d.properties && d.properties.nope || context.surface().classed('nope');
+           var target = d && d.properties && d.properties.entity; // entity to snap to
+
+           if (nope) {
+             // bounce back
+             context.perform(_actionBounceBack(entity.id, _startLoc));
+           } else if (target && target.type === 'way') {
+             var choice = geoChooseEdge(context.graph().childNodes(target), context.map().mouse(), context.projection, entity.id);
+             context.replace(actionAddMidpoint({
+               loc: choice.loc,
+               edge: [target.nodes[choice.index - 1], target.nodes[choice.index]]
+             }, entity), connectAnnotation(entity, target));
+           } else if (target && target.type === 'node' && shouldSnapToNode(target)) {
+             context.replace(actionConnect([target.id, entity.id]), connectAnnotation(entity, target));
+           } else if (_wasMidpoint) {
+             context.replace(actionNoop(), _t('operations.add.annotation.vertex'));
+           } else {
+             context.replace(actionNoop(), moveAnnotation(entity));
+           }

 
 

-               context.surface().selectAll('.note-' + _note.id)
-                   .classed('active', true);
+           if (wasPoint) {
+             context.enter(modeSelect(context, [entity.id]));
+           } else {
+             var reselection = _restoreSelectedIDs.filter(function (id) {
+               return context.graph().hasEntity(id);
+             });

 
 

-               context.perform(actionNoop());
-               context.enter(mode);
-               context.selectedNoteID(_note.id);
+             if (reselection.length) {
+               context.enter(modeSelect(context, reselection));
+             } else {
+               context.enter(modeBrowse(context));
+             }

            }
            }

+         }

 
 

+         function _actionBounceBack(nodeID, toLoc) {
+           var moveNode = actionMoveNode(nodeID, toLoc);

 
 

-           function move() {
-               event.sourceEvent.stopPropagation();
-               _lastLoc = context.projection.invert(event.point);
+           var action = function action(graph, t) {
+             // last time through, pop off the bounceback perform.
+             // it will then overwrite the initial perform with a moveNode that does nothing
+             if (t === 1) context.pop();
+             return moveNode(graph, t);
+           };

 
 

-               doMove();
-               var nudge = geoViewportEdge(event.point, context.map().dimensions());
-               if (nudge) {
-                   startNudge(nudge);
-               } else {
-                   stopNudge();
-               }
-           }
+           action.transitionable = true;
+           return action;
+         }

 
 

+         function cancel() {
+           drag.cancel();
+           context.enter(modeBrowse(context));
+         }

 
 

-           function doMove(nudge) {
-               nudge = nudge || [0, 0];
+         var drag = behaviorDrag().selector('.layer-touch.points .target').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);

 
 

-               var currPoint = (event && event.point) || context.projection(_lastLoc);
-               var currMouse = geoVecSubtract(currPoint, nudge);
-               var loc = context.projection.invert(currMouse);
+         mode.enter = function () {
+           context.install(hover);
+           context.install(edit);
+           select(window).on('keydown.dragNode', keydown).on('keyup.dragNode', keyup);
+           context.history().on('undone.drag-node', cancel);
+         };

 
 

-               _note = _note.move(loc);
+         mode.exit = function () {
+           context.ui().sidebar.hover.cancel();
+           context.uninstall(hover);
+           context.uninstall(edit);
+           select(window).on('keydown.dragNode', null).on('keyup.dragNode', null);
+           context.history().on('undone.drag-node', null);
+           _activeEntity = null;
+           context.surface().classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false).selectAll('.active').classed('active', false);
+           stopNudge();
+         };

 
 

-               var osm = services.osm;
-               if (osm) {
-                   osm.replaceNote(_note);  // update note cache
-               }
+         mode.selectedIDs = function () {
+           if (!arguments.length) return _activeEntity ? [_activeEntity.id] : []; // no assign

 
 

-               context.replace(actionNoop());   // trigger redraw
-           }
+           return mode;
+         };

 
 

+         mode.activeID = function () {
+           if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign

 
 

-           function end() {
-               context.replace(actionNoop());   // trigger redraw
+           return mode;
+         };

 
 

-               context
-                   .selectedNoteID(_note.id)
-                   .enter(modeSelectNote(context, _note.id));
-           }
+         mode.restoreSelectedIDs = function (_) {
+           if (!arguments.length) return _restoreSelectedIDs;
+           _restoreSelectedIDs = _;
+           return mode;
+         };

 
 

+         mode.behavior = drag;
+         return mode;
+       }

 
 

-           var drag = behaviorDrag()
-               .selector('.layer-touch.markers .target.note.new')
-               .surface(context.container().select('.main-map').node())
-               .origin(origin)
-               .on('start', start)
-               .on('move', move)
-               .on('end', end);
+       var $$4 = _export;
+       var NativePromise = nativePromiseConstructor;
+       var fails$1 = fails$N;
+       var getBuiltIn = getBuiltIn$9;
+       var speciesConstructor = speciesConstructor$8;
+       var promiseResolve = promiseResolve$2;
+       var redefine = redefine$g.exports;

 
 

+       // Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829
+       var NON_GENERIC = !!NativePromise && fails$1(function () {
+         NativePromise.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });
+       });

 
 

-           mode.enter = function() {
-               context.install(edit);
-           };
+       // `Promise.prototype.finally` method
+       // https://tc39.es/ecma262/#sec-promise.prototype.finally
+       $$4({ target: 'Promise', proto: true, real: true, forced: NON_GENERIC }, {
+         'finally': function (onFinally) {
+           var C = speciesConstructor(this, getBuiltIn('Promise'));
+           var isFunction = typeof onFinally == 'function';
+           return this.then(
+             isFunction ? function (x) {
+               return promiseResolve(C, onFinally()).then(function () { return x; });
+             } : onFinally,
+             isFunction ? function (e) {
+               return promiseResolve(C, onFinally()).then(function () { throw e; });
+             } : onFinally
+           );
+         }
+       });

 
 

+       // makes sure that native promise-based APIs `Promise#finally` properly works with patched `Promise#then`
+       if (typeof NativePromise == 'function') {
+         var method = getBuiltIn('Promise').prototype['finally'];
+         if (NativePromise.prototype['finally'] !== method) {
+           redefine(NativePromise.prototype, 'finally', method, { unsafe: true });
+         }
+       }

 
 

-           mode.exit = function() {
-               context.ui().sidebar.hover.cancel();
-               context.uninstall(edit);
+       function quickselect(arr, k, left, right, compare) {
+         quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+       }

 
 

-               context.surface()
-                   .selectAll('.active')
-                   .classed('active', false);
+       function quickselectStep(arr, k, left, right, compare) {
+         while (right > left) {
+           if (right - left > 600) {
+             var n = right - left + 1;
+             var m = k - left + 1;
+             var z = Math.log(n);
+             var s = 0.5 * Math.exp(2 * z / 3);
+             var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+             var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+             var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+             quickselectStep(arr, k, newLeft, newRight, compare);
+           }
+
+           var t = arr[k];
+           var i = left;
+           var j = right;
+           swap(arr, left, k);
+           if (compare(arr[right], t) > 0) swap(arr, left, right);
+
+           while (i < j) {
+             swap(arr, i, j);
+             i++;
+             j--;

 
 

-               stopNudge();
-           };
+             while (compare(arr[i], t) < 0) {
+               i++;
+             }

 
 

-           mode.behavior = drag;
+             while (compare(arr[j], t) > 0) {
+               j--;
+             }
+           }

 
 

-           return mode;
+           if (compare(arr[left], t) === 0) swap(arr, left, j);else {
+             j++;
+             swap(arr, j, right);
+           }
+           if (j <= k) left = j + 1;
+           if (k <= j) right = j - 1;
+         }

        }
 
        }
 

-       function uiDataHeader() {
-           var _datum;
-
-
-           function dataHeader(selection) {
-               var header = selection.selectAll('.data-header')
-                   .data(
-                       (_datum ? [_datum] : []),
-                       function(d) { return d.__featurehash__; }
-                   );
+       function swap(arr, i, j) {
+         var tmp = arr[i];
+         arr[i] = arr[j];
+         arr[j] = tmp;
+       }

 
 

-               header.exit()
-                   .remove();
+       function defaultCompare(a, b) {
+         return a < b ? -1 : a > b ? 1 : 0;
+       }

 
 

-               var headerEnter = header.enter()
-                   .append('div')
-                   .attr('class', 'data-header');
+       var RBush = /*#__PURE__*/function () {
+         function RBush() {
+           var maxEntries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 9;

 
 

-               var iconEnter = headerEnter
-                   .append('div')
-                   .attr('class', 'data-header-icon');
+           _classCallCheck$1(this, RBush);

 
 

-               iconEnter
-                   .append('div')
-                   .attr('class', 'preset-icon-28')
-                   .call(svgIcon('#iD-icon-data', 'note-fill'));
+           // max entries in a node is 9 by default; min node fill is 40% for best performance
+           this._maxEntries = Math.max(4, maxEntries);
+           this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
+           this.clear();
+         }

 
 

-               headerEnter
-                   .append('div')
-                   .attr('class', 'data-header-label')
-                   .text(_t('map_data.layers.custom.title'));
+         _createClass$1(RBush, [{
+           key: "all",
+           value: function all() {
+             return this._all(this.data, []);

            }
            }

+         }, {
+           key: "search",
+           value: function search(bbox) {
+             var node = this.data;
+             var result = [];
+             if (!intersects(bbox, node)) return result;
+             var toBBox = this.toBBox;
+             var nodesToSearch = [];
+
+             while (node) {
+               for (var i = 0; i < node.children.length; i++) {
+                 var child = node.children[i];
+                 var childBBox = node.leaf ? toBBox(child) : child;

 
 

+                 if (intersects(bbox, childBBox)) {
+                   if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
+                 }
+               }

 
 

-           dataHeader.datum = function(val) {
-               if (!arguments.length) { return _datum; }
-               _datum = val;
-               return this;
-           };
+               node = nodesToSearch.pop();
+             }

 
 

+             return result;
+           }
+         }, {
+           key: "collides",
+           value: function collides(bbox) {
+             var node = this.data;
+             if (!intersects(bbox, node)) return false;
+             var nodesToSearch = [];

 
 

-           return dataHeader;
-       }
+             while (node) {
+               for (var i = 0; i < node.children.length; i++) {
+                 var child = node.children[i];
+                 var childBBox = node.leaf ? this.toBBox(child) : child;

 
 

-       // This code assumes that the combobox values will not have duplicate entries.
-       // It is keyed on the `value` of the entry. Data should be an array of objects like:
-       //   [{
-       //       value:  'display text',  // required
-       //       title:  'hover text'     // optional
-       //   }, ...]
+                 if (intersects(bbox, childBBox)) {
+                   if (node.leaf || contains(bbox, childBBox)) return true;
+                   nodesToSearch.push(child);
+                 }
+               }

 
 

-       var _comboHideTimerID;
+               node = nodesToSearch.pop();
+             }

 
 

-       function uiCombobox(context, klass) {
-           var dispatch$1 = dispatch('accept', 'cancel');
-           var container = context.container();
+             return false;
+           }
+         }, {
+           key: "load",
+           value: function load(data) {
+             if (!(data && data.length)) return this;

 
 

-           var _suggestions = [];
-           var _data = [];
-           var _fetched = {};
-           var _selected = null;
-           var _canAutocomplete = true;
-           var _caseSensitive = false;
-           var _cancelFetch = false;
-           var _minItems = 2;
-           var _tDown = 0;
-           var _mouseEnterHandler, _mouseLeaveHandler;
-
-           var _fetcher = function(val, cb) {
-               cb(_data.filter(function(d) {
-                   var terms = d.terms || [];
-                   terms.push(d.value);
-                   return terms.some(function(term) {
-                       return term
-                           .toString()
-                           .toLowerCase()
-                           .indexOf(val.toLowerCase()) !== -1;
-                   });
-               }));
-           };
+             if (data.length < this._minEntries) {
+               for (var i = 0; i < data.length; i++) {
+                 this.insert(data[i]);
+               }

 
 

-           var combobox = function(input, attachTo) {
-               if (!input || input.empty()) { return; }
-
-               input
-                   .classed('combobox-input', true)
-                   .on('focus.combo-input', focus)
-                   .on('blur.combo-input', blur)
-                   .on('keydown.combo-input', keydown)
-                   .on('keyup.combo-input', keyup)
-                   .on('input.combo-input', change)
-                   .on('mousedown.combo-input', mousedown)
-                   .each(function() {
-                       var parent = this.parentNode;
-                       var sibling = this.nextSibling;
-
-                       select(parent).selectAll('.combobox-caret')
-                           .filter(function(d) { return d === input.node(); })
-                           .data([input.node()])
-                           .enter()
-                           .insert('div', function() { return sibling; })
-                           .attr('class', 'combobox-caret')
-                           .on('mousedown.combo-caret', function() {
-                               event.preventDefault(); // don't steal focus from input
-                               input.node().focus(); // focus the input as if it was clicked
-                               mousedown();
-                           })
-                           .on('mouseup.combo-caret', function() {
-                               event.preventDefault(); // don't steal focus from input
-                               mouseup();
-                           });
-                   });
+               return this;
+             } // recursively build the tree with the given data from scratch using OMT algorithm

 
 
 
 

-               function mousedown() {
-                   if (event.button !== 0) { return; }    // left click only
-                   _tDown = +new Date();
+             var node = this._build(data.slice(), 0, data.length - 1, 0);

 
 

-                   // clear selection
-                   var start = input.property('selectionStart');
-                   var end = input.property('selectionEnd');
-                   if (start !== end) {
-                       var val = utilGetSetValue(input);
-                       input.node().setSelectionRange(val.length, val.length);
-                       return;
-                   }
+             if (!this.data.children.length) {
+               // save as is if tree is empty
+               this.data = node;
+             } else if (this.data.height === node.height) {
+               // split root if trees have the same height
+               this._splitRoot(this.data, node);
+             } else {
+               if (this.data.height < node.height) {
+                 // swap trees if inserted one is bigger
+                 var tmpNode = this.data;
+                 this.data = node;
+                 node = tmpNode;
+               } // insert the small tree into the large tree at appropriate level

 
 

-                   input.on('mouseup.combo-input', mouseup);
-               }

 
 

+               this._insert(node, this.data.height - node.height - 1, true);
+             }

 
 

-               function mouseup() {
-                   input.on('mouseup.combo-input', null);
-                   if (event.button !== 0) { return; }    // left click only
-                   if (input.node() !== document.activeElement) { return; }   // exit if this input is not focused
+             return this;
+           }
+         }, {
+           key: "insert",
+           value: function insert(item) {
+             if (item) this._insert(item, this.data.height - 1);
+             return this;
+           }
+         }, {
+           key: "clear",
+           value: function clear() {
+             this.data = createNode([]);
+             return this;
+           }
+         }, {
+           key: "remove",
+           value: function remove(item, equalsFn) {
+             if (!item) return this;
+             var node = this.data;
+             var bbox = this.toBBox(item);
+             var path = [];
+             var indexes = [];
+             var i, parent, goingUp; // depth-first iterative tree traversal
+
+             while (node || path.length) {
+               if (!node) {
+                 // go up
+                 node = path.pop();
+                 parent = path[path.length - 1];
+                 i = indexes.pop();
+                 goingUp = true;
+               }
+
+               if (node.leaf) {
+                 // check current node
+                 var index = findItem(item, node.children, equalsFn);
+
+                 if (index !== -1) {
+                   // item found, remove the item and condense tree upwards
+                   node.children.splice(index, 1);
+                   path.push(node);

 
 

-                   var start = input.property('selectionStart');
-                   var end = input.property('selectionEnd');
-                   if (start !== end) { return; }  // exit if user is selecting
-
-                   // not showing or showing for a different field - try to show it.
-                   var combo = container.selectAll('.combobox');
-                   if (combo.empty() || combo.datum() !== input.node()) {
-                       var tOrig = _tDown;
-                       window.setTimeout(function() {
-                           if (tOrig !== _tDown) { return; }   // exit if user double clicked
-                           fetchComboData('', function() {
-                               show();
-                               render();
-                           });
-                       }, 250);
+                   this._condense(path);

 
 

-                   } else {
-                       hide();
-                   }
+                   return this;
+                 }

                }
 
                }
 

+               if (!goingUp && !node.leaf && contains(node, bbox)) {
+                 // go down
+                 path.push(node);
+                 indexes.push(i);
+                 i = 0;
+                 parent = node;
+                 node = node.children[0];
+               } else if (parent) {
+                 // go right
+                 i++;
+                 node = parent.children[i];
+                 goingUp = false;
+               } else node = null; // nothing found

 
 

-               function focus() {
-                   fetchComboData('');   // prefetch values (may warm taginfo cache)
-               }
+             }

 
 

+             return this;
+           }
+         }, {
+           key: "toBBox",
+           value: function toBBox(item) {
+             return item;
+           }
+         }, {
+           key: "compareMinX",
+           value: function compareMinX(a, b) {
+             return a.minX - b.minX;
+           }
+         }, {
+           key: "compareMinY",
+           value: function compareMinY(a, b) {
+             return a.minY - b.minY;
+           }
+         }, {
+           key: "toJSON",
+           value: function toJSON() {
+             return this.data;
+           }
+         }, {
+           key: "fromJSON",
+           value: function fromJSON(data) {
+             this.data = data;
+             return this;
+           }
+         }, {
+           key: "_all",
+           value: function _all(node, result) {
+             var nodesToSearch = [];

 
 

-               function blur() {
-                   _comboHideTimerID = window.setTimeout(hide, 75);
-               }
+             while (node) {
+               if (node.leaf) result.push.apply(result, _toConsumableArray(node.children));else nodesToSearch.push.apply(nodesToSearch, _toConsumableArray(node.children));
+               node = nodesToSearch.pop();
+             }
+
+             return result;
+           }
+         }, {
+           key: "_build",
+           value: function _build(items, left, right, height) {
+             var N = right - left + 1;
+             var M = this._maxEntries;
+             var node;

 
 

+             if (N <= M) {
+               // reached leaf level; return leaf
+               node = createNode(items.slice(left, right + 1));
+               calcBBox(node, this.toBBox);
+               return node;
+             }

 
 

-               function show() {
-                   hide();   // remove any existing
+             if (!height) {
+               // target height of the bulk-loaded tree
+               height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization

 
 

-                   container
-                       .insert('div', ':first-child')
-                       .datum(input.node())
-                       .attr('class', 'combobox' + (klass ? ' combobox-' + klass : ''))
-                       .style('position', 'absolute')
-                       .style('display', 'block')
-                       .style('left', '0px')
-                       .on('mousedown.combo-container', function () {
-                           // prevent moving focus out of the input field
-                           event.preventDefault();
-                       });
+               M = Math.ceil(N / Math.pow(M, height - 1));
+             }

 
 

-                   container
-                       .on('scroll.combo-scroll', render, true);
-               }
+             node = createNode([]);
+             node.leaf = false;
+             node.height = height; // split the items into M mostly square tiles

 
 

+             var N2 = Math.ceil(N / M);
+             var N1 = N2 * Math.ceil(Math.sqrt(M));
+             multiSelect(items, left, right, N1, this.compareMinX);

 
 

-               function hide() {
-                   if (_comboHideTimerID) {
-                       window.clearTimeout(_comboHideTimerID);
-                       _comboHideTimerID = undefined;
-                   }
+             for (var i = left; i <= right; i += N1) {
+               var right2 = Math.min(i + N1 - 1, right);
+               multiSelect(items, i, right2, N2, this.compareMinY);

 
 

-                   container.selectAll('.combobox')
-                       .remove();
+               for (var j = i; j <= right2; j += N2) {
+                 var right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively

 
 

-                   container
-                       .on('scroll.combo-scroll', null);
+                 node.children.push(this._build(items, j, right3, height - 1));

                }
                }

+             }

 
 

+             calcBBox(node, this.toBBox);
+             return node;
+           }
+         }, {
+           key: "_chooseSubtree",
+           value: function _chooseSubtree(bbox, node, level, path) {
+             while (true) {
+               path.push(node);
+               if (node.leaf || path.length - 1 === level) break;
+               var minArea = Infinity;
+               var minEnlargement = Infinity;
+               var targetNode = void 0;

 
 

-               function keydown() {
-                   var shown = !container.selectAll('.combobox').empty();
-                   var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
+               for (var i = 0; i < node.children.length; i++) {
+                 var child = node.children[i];
+                 var area = bboxArea(child);
+                 var enlargement = enlargedArea(bbox, child) - area; // choose entry with the least area enlargement

 
 

-                   switch (event.keyCode) {
-                       case 8:   // ⌫ Backspace
-                       case 46:  // ⌦ Delete
-                           event.stopPropagation();
-                           _selected = null;
-                           render();
-                           input.on('input.combo-input', function() {
-                               var start = input.property('selectionStart');
-                               input.node().setSelectionRange(start, start);
-                               input.on('input.combo-input', change);
-                           });
-                           break;
-
-                       case 9:   // ⇥ Tab
-                           accept();
-                           break;
-
-                       case 13:  // ↩ Return
-                           event.preventDefault();
-                           event.stopPropagation();
-                           break;
-
-                       case 38:  // ↑ Up arrow
-                           if (tagName === 'textarea' && !shown) { return; }
-                           event.preventDefault();
-                           if (tagName === 'input' && !shown) {
-                               show();
-                           }
-                           nav(-1);
-                           break;
-
-                       case 40:  // ↓ Down arrow
-                           if (tagName === 'textarea' && !shown) { return; }
-                           event.preventDefault();
-                           if (tagName === 'input' && !shown) {
-                               show();
-                           }
-                           nav(+1);
-                           break;
+                 if (enlargement < minEnlargement) {
+                   minEnlargement = enlargement;
+                   minArea = area < minArea ? area : minArea;
+                   targetNode = child;
+                 } else if (enlargement === minEnlargement) {
+                   // otherwise choose one with the smallest area
+                   if (area < minArea) {
+                     minArea = area;
+                     targetNode = child;

                    }
                    }

+                 }

                }
 
                }
 

+               node = targetNode || node.children[0];
+             }

 
 

-               function keyup() {
-                   switch (event.keyCode) {
-                       case 27:  // ⎋ Escape
-                           cancel();
-                           break;
+             return node;
+           }
+         }, {
+           key: "_insert",
+           value: function _insert(item, level, isNode) {
+             var bbox = isNode ? item : this.toBBox(item);
+             var insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too

 
 

-                       case 13:  // ↩ Return
-                           accept();
-                           break;
-                   }
-               }
+             var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node

 
 
 
 

-               // Called whenever the input value is changed (e.g. on typing)
-               function change() {
-                   fetchComboData(value(), function() {
-                       _selected = null;
-                       var val = input.property('value');
+             node.children.push(item);
+             extend$1(node, bbox); // split on node overflow; propagate upwards if necessary

 
 

-                       if (_suggestions.length) {
-                           if (input.property('selectionEnd') === val.length) {
-                               _selected = tryAutocomplete();
-                           }
+             while (level >= 0) {
+               if (insertPath[level].children.length > this._maxEntries) {
+                 this._split(insertPath, level);

 
 

-                           if (!_selected) {
-                               _selected = val;
-                           }
-                       }
+                 level--;
+               } else break;
+             } // adjust bboxes along the insertion path

 
 

-                       if (val.length) {
-                           var combo = container.selectAll('.combobox');
-                           if (combo.empty()) {
-                               show();
-                           }
-                       } else {
-                           hide();
-                       }

 
 

-                       render();
-                   });
-               }
+             this._adjustParentBBoxes(bbox, insertPath, level);
+           } // split overflowed node into two
+
+         }, {
+           key: "_split",
+           value: function _split(insertPath, level) {
+             var node = insertPath[level];
+             var M = node.children.length;
+             var m = this._minEntries;

 
 

+             this._chooseSplitAxis(node, m, M);

 
 

-               // Called when the user presses up/down arrows to navigate the list
-               function nav(dir) {
-                   if (_suggestions.length) {
-                       // try to determine previously selected index..
-                       var index = -1;
-                       for (var i = 0; i < _suggestions.length; i++) {
-                           if (_selected && _suggestions[i].value === _selected) {
-                               index = i;
-                               break;
-                           }
-                       }
+             var splitIndex = this._chooseSplitIndex(node, m, M);

 
 

-                       // pick new _selected
-                       index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
-                       _selected = _suggestions[index].value;
-                       input.property('value', _selected);
-                   }
+             var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));
+             newNode.height = node.height;
+             newNode.leaf = node.leaf;
+             calcBBox(node, this.toBBox);
+             calcBBox(newNode, this.toBBox);
+             if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
+           }
+         }, {
+           key: "_splitRoot",
+           value: function _splitRoot(node, newNode) {
+             // split root node
+             this.data = createNode([node, newNode]);
+             this.data.height = node.height + 1;
+             this.data.leaf = false;
+             calcBBox(this.data, this.toBBox);
+           }
+         }, {
+           key: "_chooseSplitIndex",
+           value: function _chooseSplitIndex(node, m, M) {
+             var index;
+             var minOverlap = Infinity;
+             var minArea = Infinity;

 
 

-                   render();
-                   ensureVisible();
+             for (var i = m; i <= M - m; i++) {
+               var bbox1 = distBBox(node, 0, i, this.toBBox);
+               var bbox2 = distBBox(node, i, M, this.toBBox);
+               var overlap = intersectionArea(bbox1, bbox2);
+               var area = bboxArea(bbox1) + bboxArea(bbox2); // choose distribution with minimum overlap
+
+               if (overlap < minOverlap) {
+                 minOverlap = overlap;
+                 index = i;
+                 minArea = area < minArea ? area : minArea;
+               } else if (overlap === minOverlap) {
+                 // otherwise choose distribution with minimum area
+                 if (area < minArea) {
+                   minArea = area;
+                   index = i;
+                 }

                }
                }

+             }

 
 

+             return index || M - m;
+           } // sorts node children by the best axis for split

 
 

-               function ensureVisible() {
-                   var combo = container.selectAll('.combobox');
-                   if (combo.empty()) { return; }
+         }, {
+           key: "_chooseSplitAxis",
+           value: function _chooseSplitAxis(node, m, M) {
+             var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
+             var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;

 
 

-                   var containerRect = container.node().getBoundingClientRect();
-                   var comboRect = combo.node().getBoundingClientRect();
+             var xMargin = this._allDistMargin(node, m, M, compareMinX);

 
 

-                   if (comboRect.bottom > containerRect.bottom) {
-                       var node = attachTo ? attachTo.node() : input.node();
-                       node.scrollIntoView({ behavior: 'instant', block: 'center' });
-                       render();
-                   }
+             var yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
+             // otherwise it's already sorted by minY

 
 

-                   // https://stackoverflow.com/questions/11039885/scrollintoview-causing-the-whole-page-to-move
-                   var selected = combo.selectAll('.combobox-option.selected').node();
-                   if (selected) {
-                       selected.scrollIntoView({ behavior: 'smooth', block: 'nearest' });
-                   }
-               }

 
 

+             if (xMargin < yMargin) node.children.sort(compareMinX);
+           } // total margin of all possible split distributions where each node is at least m full

 
 

-               function value() {
-                   var value = input.property('value');
-                   var start = input.property('selectionStart');
-                   var end = input.property('selectionEnd');
+         }, {
+           key: "_allDistMargin",
+           value: function _allDistMargin(node, m, M, compare) {
+             node.children.sort(compare);
+             var toBBox = this.toBBox;
+             var leftBBox = distBBox(node, 0, m, toBBox);
+             var rightBBox = distBBox(node, M - m, M, toBBox);
+             var margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);
+
+             for (var i = m; i < M - m; i++) {
+               var child = node.children[i];
+               extend$1(leftBBox, node.leaf ? toBBox(child) : child);
+               margin += bboxMargin(leftBBox);
+             }

 
 

-                   if (start && end) {
-                       value = value.substring(0, start);
-                   }
+             for (var _i = M - m - 1; _i >= m; _i--) {
+               var _child = node.children[_i];
+               extend$1(rightBBox, node.leaf ? toBBox(_child) : _child);
+               margin += bboxMargin(rightBBox);
+             }

 
 

-                   return value;
-               }
+             return margin;
+           }
+         }, {
+           key: "_adjustParentBBoxes",
+           value: function _adjustParentBBoxes(bbox, path, level) {
+             // adjust bboxes along the given tree path
+             for (var i = level; i >= 0; i--) {
+               extend$1(path[i], bbox);
+             }
+           }
+         }, {
+           key: "_condense",
+           value: function _condense(path) {
+             // go through the path, removing empty nodes and updating bboxes
+             for (var i = path.length - 1, siblings; i >= 0; i--) {
+               if (path[i].children.length === 0) {
+                 if (i > 0) {
+                   siblings = path[i - 1].children;
+                   siblings.splice(siblings.indexOf(path[i]), 1);
+                 } else this.clear();
+               } else calcBBox(path[i], this.toBBox);
+             }
+           }
+         }]);

 
 

+         return RBush;
+       }();

 
 

-               function fetchComboData(v, cb) {
-                   _cancelFetch = false;
+       function findItem(item, items, equalsFn) {
+         if (!equalsFn) return items.indexOf(item);

 
 

-                   _fetcher.call(input, v, function(results) {
-                       // already chose a value, don't overwrite or autocomplete it
-                       if (_cancelFetch) { return; }
+         for (var i = 0; i < items.length; i++) {
+           if (equalsFn(item, items[i])) return i;
+         }

 
 

-                       _suggestions = results;
-                       results.forEach(function(d) { _fetched[d.value] = d; });
+         return -1;
+       } // calculate node's bbox from bboxes of its children

 
 

-                       if (cb) {
-                           cb();
-                       }
-                   });
-               }

 
 

+       function calcBBox(node, toBBox) {
+         distBBox(node, 0, node.children.length, toBBox, node);
+       } // min bounding rectangle of node children from k to p-1

 
 

-               function tryAutocomplete() {
-                   if (!_canAutocomplete) { return; }

 
 

-                   var val = _caseSensitive ? value() : value().toLowerCase();
-                   if (!val) { return; }
+       function distBBox(node, k, p, toBBox, destNode) {
+         if (!destNode) destNode = createNode(null);
+         destNode.minX = Infinity;
+         destNode.minY = Infinity;
+         destNode.maxX = -Infinity;
+         destNode.maxY = -Infinity;

 
 

-                   // Don't autocomplete if user is typing a number - #4935
-                   if (!isNaN(parseFloat(val)) && isFinite(val)) { return; }
+         for (var i = k; i < p; i++) {
+           var child = node.children[i];
+           extend$1(destNode, node.leaf ? toBBox(child) : child);
+         }

 
 

-                   var bestIndex = -1;
-                   for (var i = 0; i < _suggestions.length; i++) {
-                       var suggestion = _suggestions[i].value;
-                       var compare = _caseSensitive ? suggestion : suggestion.toLowerCase();
+         return destNode;
+       }

 
 

-                       // if search string matches suggestion exactly, pick it..
-                       if (compare === val) {
-                           bestIndex = i;
-                           break;
+       function extend$1(a, b) {
+         a.minX = Math.min(a.minX, b.minX);
+         a.minY = Math.min(a.minY, b.minY);
+         a.maxX = Math.max(a.maxX, b.maxX);
+         a.maxY = Math.max(a.maxY, b.maxY);
+         return a;
+       }

 
 

-                       // otherwise lock in the first result that starts with the search string..
-                       } else if (bestIndex === -1 && compare.indexOf(val) === 0) {
-                           bestIndex = i;
-                       }
-                   }
+       function compareNodeMinX(a, b) {
+         return a.minX - b.minX;
+       }

 
 

-                   if (bestIndex !== -1) {
-                       var bestVal = _suggestions[bestIndex].value;
-                       input.property('value', bestVal);
-                       input.node().setSelectionRange(val.length, bestVal.length);
-                       return bestVal;
-                   }
-               }
+       function compareNodeMinY(a, b) {
+         return a.minY - b.minY;
+       }

 
 

+       function bboxArea(a) {
+         return (a.maxX - a.minX) * (a.maxY - a.minY);
+       }

 
 

-               function render() {
-                   if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
-                       hide();
-                       return;
-                   }
+       function bboxMargin(a) {
+         return a.maxX - a.minX + (a.maxY - a.minY);
+       }

 
 

-                   var shown = !container.selectAll('.combobox').empty();
-                   if (!shown) { return; }
-
-                   var combo = container.selectAll('.combobox');
-                   var options = combo.selectAll('.combobox-option')
-                       .data(_suggestions, function(d) { return d.value; });
-
-                   options.exit()
-                       .remove();
-
-                   // enter/update
-                   options.enter()
-                       .append('a')
-                       .attr('class', 'combobox-option')
-                       .attr('title', function(d) { return d.title; })
-                       .text(function(d) { return d.display || d.value; })
-                       .on('mouseenter', _mouseEnterHandler)
-                       .on('mouseleave', _mouseLeaveHandler)
-                       .merge(options)
-                       .classed('selected', function(d) { return d.value === _selected; })
-                       .on('click.combo-option', accept)
-                       .order();
-
-                   var node = attachTo ? attachTo.node() : input.node();
-                   var containerRect = container.node().getBoundingClientRect();
-                   var rect = node.getBoundingClientRect();
-
-                   combo
-                       .style('left', (rect.left + 5 - containerRect.left) + 'px')
-                       .style('width', (rect.width - 10) + 'px')
-                       .style('top', (rect.height + rect.top - containerRect.top) + 'px');
-               }
-
-
-               // Dispatches an 'accept' event
-               // Then hides the combobox.
-               function accept(d) {
-                   _cancelFetch = true;
-                   var thiz = input.node();
-
-                   if (d) {   // user clicked on a suggestion
-                       utilGetSetValue(input, d.value);    // replace field contents
-                       utilTriggerEvent(input, 'change');
-                   }
+       function enlargedArea(a, b) {
+         return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
+       }

 
 

-                   // clear (and keep) selection
-                   var val = utilGetSetValue(input);
-                   thiz.setSelectionRange(val.length, val.length);
+       function intersectionArea(a, b) {
+         var minX = Math.max(a.minX, b.minX);
+         var minY = Math.max(a.minY, b.minY);
+         var maxX = Math.min(a.maxX, b.maxX);
+         var maxY = Math.min(a.maxY, b.maxY);
+         return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);
+       }

 
 

-                   d = _fetched[val];
-                   dispatch$1.call('accept', thiz, d, val);
-                   hide();
-               }
+       function contains(a, b) {
+         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+       }

 
 

+       function intersects(a, b) {
+         return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+       }

 
 

-               // Dispatches an 'cancel' event
-               // Then hides the combobox.
-               function cancel() {
-                   _cancelFetch = true;
-                   var thiz = input.node();
+       function createNode(children) {
+         return {
+           children: children,
+           height: 1,
+           leaf: true,
+           minX: Infinity,
+           minY: Infinity,
+           maxX: -Infinity,
+           maxY: -Infinity
+         };
+       } // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
+       // combines selection algorithm with binary divide & conquer approach

 
 

-                   // clear (and remove) selection, and replace field contents
-                   var val = utilGetSetValue(input);
-                   var start = input.property('selectionStart');
-                   var end = input.property('selectionEnd');
-                   val = val.slice(0, start) + val.slice(end);
-                   utilGetSetValue(input, val);
-                   thiz.setSelectionRange(val.length, val.length);

 
 

-                   dispatch$1.call('cancel', thiz);
-                   hide();
-               }
+       function multiSelect(arr, left, right, n, compare) {
+         var stack = [left, right];

 
 

-           };
+         while (stack.length) {
+           right = stack.pop();
+           left = stack.pop();
+           if (right - left <= n) continue;
+           var mid = left + Math.ceil((right - left) / n / 2) * n;
+           quickselect(arr, mid, left, right, compare);
+           stack.push(left, mid, mid, right);
+         }
+       }

 
 

+       function responseText(response) {
+         if (!response.ok) throw new Error(response.status + " " + response.statusText);
+         return response.text();
+       }

 
 

-           combobox.canAutocomplete = function(val) {
-               if (!arguments.length) { return _canAutocomplete; }
-               _canAutocomplete = val;
-               return combobox;
-           };
+       function d3_text (input, init) {
+         return fetch(input, init).then(responseText);
+       }

 
 

-           combobox.caseSensitive = function(val) {
-               if (!arguments.length) { return _caseSensitive; }
-               _caseSensitive = val;
-               return combobox;
-           };
+       function responseJson(response) {
+         if (!response.ok) throw new Error(response.status + " " + response.statusText);
+         if (response.status === 204 || response.status === 205) return;
+         return response.json();
+       }

 
 

-           combobox.data = function(val) {
-               if (!arguments.length) { return _data; }
-               _data = val;
-               return combobox;
-           };
+       function d3_json (input, init) {
+         return fetch(input, init).then(responseJson);
+       }

 
 

-           combobox.fetcher = function(val) {
-               if (!arguments.length) { return _fetcher; }
-               _fetcher = val;
-               return combobox;
-           };
+       function parser(type) {
+         return function (input, init) {
+           return d3_text(input, init).then(function (text) {
+             return new DOMParser().parseFromString(text, type);
+           });
+         };
+       }

 
 

-           combobox.minItems = function(val) {
-               if (!arguments.length) { return _minItems; }
-               _minItems = val;
-               return combobox;
-           };
+       var d3_xml = parser("application/xml");
+       var svg = parser("image/svg+xml");

 
 

-           combobox.itemsMouseEnter = function(val) {
-               if (!arguments.length) { return _mouseEnterHandler; }
-               _mouseEnterHandler = val;
-               return combobox;
-           };
+       var tiler$6 = utilTiler();
+       var dispatch$7 = dispatch$8('loaded');
+       var _tileZoom$3 = 14;
+       var _krUrlRoot = 'https://www.keepright.at';
+       var _krData = {
+         errorTypes: {},
+         localizeStrings: {}
+       }; // This gets reassigned if reset

 
 

-           combobox.itemsMouseLeave = function(val) {
-               if (!arguments.length) { return _mouseLeaveHandler; }
-               _mouseLeaveHandler = val;
-               return combobox;
-           };
+       var _cache$2;
+
+       var _krRuleset = [// no 20 - multiple node on same spot - these are mostly boundaries overlapping roads
+       30, 40, 50, 60, 70, 90, 100, 110, 120, 130, 150, 160, 170, 180, 190, 191, 192, 193, 194, 195, 196, 197, 198, 200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 220, 230, 231, 232, 270, 280, 281, 282, 283, 284, 285, 290, 291, 292, 293, 294, 295, 296, 297, 298, 300, 310, 311, 312, 313, 320, 350, 360, 370, 380, 390, 400, 401, 402, 410, 411, 412, 413];

 
 

-           return utilRebind(combobox, dispatch$1, 'on');
+       function abortRequest$6(controller) {
+         if (controller) {
+           controller.abort();
+         }

        }
 
        }
 

+       function abortUnwantedRequests$3(cache, tiles) {
+         Object.keys(cache.inflightTile).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k === tile.id;
+           });
+
+           if (!wanted) {
+             abortRequest$6(cache.inflightTile[k]);
+             delete cache.inflightTile[k];
+           }
+         });
+       }

 
 

-       uiCombobox.off = function(input, context) {
-           input
-               .on('focus.combo-input', null)
-               .on('blur.combo-input', null)
-               .on('keydown.combo-input', null)
-               .on('keyup.combo-input', null)
-               .on('input.combo-input', null)
-               .on('mousedown.combo-input', null)
-               .on('mouseup.combo-input', null);
+       function encodeIssueRtree$2(d) {
+         return {
+           minX: d.loc[0],
+           minY: d.loc[1],
+           maxX: d.loc[0],
+           maxY: d.loc[1],
+           data: d
+         };
+       } // Replace or remove QAItem from rtree

 
 
 
 

-           context.container()
-               .on('scroll.combo-scroll', null);
-       };
+       function updateRtree$3(item, replace) {
+         _cache$2.rtree.remove(item, function (a, b) {
+           return a.data.id === b.data.id;
+         });

 
 

-       // toggles the visibility of ui elements, using a combination of the
-       // hide class, which sets display=none, and a d3 transition for opacity.
-       // this will cause blinking when called repeatedly, so check that the
-       // value actually changes between calls.
-       function uiToggle(show, callback) {
-           return function(selection) {
-               selection
-                   .style('opacity', show ? 0 : 1)
-                   .classed('hide', false)
-                   .transition()
-                   .style('opacity', show ? 1 : 0)
-                   .on('end', function() {
-                       select(this)
-                           .classed('hide', !show)
-                           .style('opacity', null);
-                       if (callback) { callback.apply(this); }
-                   });
-           };
+         if (replace) {
+           _cache$2.rtree.insert(item);
+         }

        }
 
        }
 

-       function uiDisclosure(context, key, expandedDefault) {
-           var dispatch$1 = dispatch('toggled');
-           var _expanded;
-           var _title = utilFunctor('');
-           var _updatePreference = true;
-           var _content = function () {};
+       function tokenReplacements(d) {
+         if (!(d instanceof QAItem)) return;
+         var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
+         var replacements = {};
+         var issueTemplate = _krData.errorTypes[d.whichType];
+
+         if (!issueTemplate) {
+           /* eslint-disable no-console */
+           console.log('No Template: ', d.whichType);
+           console.log('  ', d.description);
+           /* eslint-enable no-console */

 
 

+           return;
+         } // some descriptions are just fixed text

 
 

-           var disclosure = function(selection) {

 
 

-               if (_expanded === undefined || _expanded === null) {
-                   // loading _expanded here allows it to be reset by calling `disclosure.expanded(null)`
+         if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured

 
 

-                   var preference = corePreferences('disclosure.' + key + '.expanded');
-                   _expanded = preference === null ? !!expandedDefault : (preference === 'true');
-               }
+         var errorRegex = new RegExp(issueTemplate.regex, 'i');
+         var errorMatch = errorRegex.exec(d.description);

 
 

-               var hideToggle = selection.selectAll('.hide-toggle-' + key)
-                   .data([0]);
+         if (!errorMatch) {
+           /* eslint-disable no-console */
+           console.log('Unmatched: ', d.whichType);
+           console.log('  ', d.description);
+           console.log('  ', errorRegex);
+           /* eslint-enable no-console */

 
 

-               // enter
-               var hideToggleEnter = hideToggle.enter()
-                   .append('a')
-                   .attr('href', '#')
-                   .attr('class', 'hide-toggle hide-toggle-' + key)
-                   .call(svgIcon('', 'pre-text', 'hide-toggle-icon'));
+           return;
+         }

 
 

-               hideToggleEnter
-                   .append('span')
-                   .attr('class', 'hide-toggle-text');
+         for (var i = 1; i < errorMatch.length; i++) {
+           // skip first
+           var capture = errorMatch[i];
+           var idType = void 0;
+           idType = 'IDs' in issueTemplate ? issueTemplate.IDs[i - 1] : '';

 
 

-               // update
-               hideToggle = hideToggleEnter
-                   .merge(hideToggle);
+           if (idType && capture) {
+             // link IDs if present in the capture
+             capture = parseError(capture, idType);
+           } else if (htmlRegex.test(capture)) {
+             // escape any html in non-IDs
+             capture = '\\' + capture + '\\';
+           } else {
+             var compare = capture.toLowerCase();

 
 

-               hideToggle
-                   .on('click', toggle)
-                   .classed('expanded', _expanded);
+             if (_krData.localizeStrings[compare]) {
+               // some replacement strings can be localized
+               capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+             }
+           }

 
 

-               hideToggle.selectAll('.hide-toggle-text')
-                   .text(_title());
+           replacements['var' + i] = capture;
+         }

 
 

-               hideToggle.selectAll('.hide-toggle-icon')
-                   .attr('xlink:href', _expanded ? '#iD-icon-down'
-                       : (_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'
-                   );
+         return replacements;
+       }

 
 

+       function parseError(capture, idType) {
+         var compare = capture.toLowerCase();

 
 

-               var wrap = selection.selectAll('.disclosure-wrap')
-                   .data([0]);
+         if (_krData.localizeStrings[compare]) {
+           // some replacement strings can be localized
+           capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+         }

 
 

-               // enter/update
-               wrap = wrap.enter()
-                   .append('div')
-                   .attr('class', 'disclosure-wrap disclosure-wrap-' + key)
-                   .merge(wrap)
-                   .classed('hide', !_expanded);
+         switch (idType) {
+           // link a string like "this node"
+           case 'this':
+             capture = linkErrorObject(capture);
+             break;

 
 

-               if (_expanded) {
-                   wrap
-                       .call(_content);
-               }
+           case 'url':
+             capture = linkURL(capture);
+             break;
+           // link an entity ID

 
 

+           case 'n':
+           case 'w':
+           case 'r':
+             capture = linkEntity(idType + capture);
+             break;
+           // some errors have more complex ID lists/variance

 
 

-               function toggle() {
-                   event.preventDefault();
+           case '20':
+             capture = parse20(capture);
+             break;

 
 

-                   _expanded = !_expanded;
+           case '211':
+             capture = parse211(capture);
+             break;

 
 

-                   if (_updatePreference) {
-                       corePreferences('disclosure.' + key + '.expanded', _expanded);
-                   }
+           case '231':
+             capture = parse231(capture);
+             break;

 
 

-                   hideToggle
-                       .classed('expanded', _expanded);
+           case '294':
+             capture = parse294(capture);
+             break;

 
 

-                   hideToggle.selectAll('.hide-toggle-icon')
-                       .attr('xlink:href', _expanded ? '#iD-icon-down'
-                           : (_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'
-                       );
+           case '370':
+             capture = parse370(capture);
+             break;
+         }

 
 

-                   wrap
-                       .call(uiToggle(_expanded));
+         return capture;

 
 

-                   if (_expanded) {
-                       wrap
-                           .call(_content);
-                   }
+         function linkErrorObject(d) {
+           return "<a class=\"error_object_link\">".concat(d, "</a>");
+         }

 
 

-                   dispatch$1.call('toggled', this, _expanded);
-               }
-           };
+         function linkEntity(d) {
+           return "<a class=\"error_entity_link\">".concat(d, "</a>");
+         }

 
 

+         function linkURL(d) {
+           return "<a class=\"kr_external_link\" target=\"_blank\" href=\"".concat(d, "\">").concat(d, "</a>");
+         } // arbitrary node list of form: #ID, #ID, #ID...

 
 

-           disclosure.title = function(val) {
-               if (!arguments.length) { return _title; }
-               _title = utilFunctor(val);
-               return disclosure;
-           };

 
 

+         function parse211(capture) {
+           var newList = [];
+           var items = capture.split(', ');
+           items.forEach(function (item) {
+             // ID has # at the front
+             var id = linkEntity('n' + item.slice(1));
+             newList.push(id);
+           });
+           return newList.join(', ');
+         } // arbitrary way list of form: #ID(layer),#ID(layer),#ID(layer)...

 
 

-           disclosure.expanded = function(val) {
-               if (!arguments.length) { return _expanded; }
-               _expanded = val;
-               return disclosure;
-           };

 
 

+         function parse231(capture) {
+           var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'

 
 

-           disclosure.updatePreference = function(val) {
-               if (!arguments.length) { return _updatePreference; }
-               _updatePreference = val;
-               return disclosure;
-           };
+           var items = capture.split('),');
+           items.forEach(function (item) {
+             var match = item.match(/\#(\d+)\((.+)\)?/);

 
 

+             if (match !== null && match.length > 2) {
+               newList.push(linkEntity('w' + match[1]) + ' ' + _t('QA.keepRight.errorTypes.231.layer', {
+                 layer: match[2]
+               }));
+             }
+           });
+           return newList.join(', ');
+         } // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...

 
 

-           disclosure.content = function(val) {
-               if (!arguments.length) { return _content; }
-               _content = val;
-               return disclosure;
-           };

 
 

+         function parse294(capture) {
+           var newList = [];
+           var items = capture.split(',');
+           items.forEach(function (item) {
+             // item of form "from/to node/relation #ID"
+             item = item.split(' '); // to/from role is more clear in quotes

 
 

-           return utilRebind(disclosure, dispatch$1, 'on');
-       }
+             var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type

 
 

-       // A unit of controls or info to be used in a layout, such as within a pane.
-       // Can be labeled and collapsible.
-       function uiSection(id, context) {
+             var idType = item[1].slice(0, 1); // ID has # at the front

 
 

-           var _classes = utilFunctor('');
-           var _shouldDisplay;
-           var _content;
+             var id = item[2].slice(1);
+             id = linkEntity(idType + id);
+             newList.push("".concat(role, " ").concat(item[1], " ").concat(id));
+           });
+           return newList.join(', ');
+         } // may or may not include the string "(including the name 'name')"

 
 

-           var _disclosure;
-           var _title;
-           var _expandedByDefault = utilFunctor(true);
-           var _disclosureContent;
-           var _disclosureExpanded;

 
 

-           var _containerSelection = select(null);
+         function parse370(capture) {
+           if (!capture) return '';
+           var match = capture.match(/\(including the name (\'.+\')\)/);

 
 

-           var section = {
-               id: id
-           };
+           if (match && match.length) {
+             return _t('QA.keepRight.errorTypes.370.including_the_name', {
+               name: match[1]
+             });
+           }

 
 

-           section.classes = function(val) {
-               if (!arguments.length) { return _classes; }
-               _classes = utilFunctor(val);
-               return section;
-           };
+           return '';
+         } // arbitrary node list of form: #ID,#ID,#ID...

 
 

-           section.title = function(val) {
-               if (!arguments.length) { return _title; }
-               _title = utilFunctor(val);
-               return section;
-           };

 
 

-           section.expandedByDefault = function(val) {
-               if (!arguments.length) { return _expandedByDefault; }
-               _expandedByDefault = utilFunctor(val);
-               return section;
-           };
+         function parse20(capture) {
+           var newList = [];
+           var items = capture.split(',');
+           items.forEach(function (item) {
+             // ID has # at the front
+             var id = linkEntity('n' + item.slice(1));
+             newList.push(id);
+           });
+           return newList.join(', ');
+         }
+       }

 
 

-           section.shouldDisplay = function(val) {
-               if (!arguments.length) { return _shouldDisplay; }
-               _shouldDisplay = utilFunctor(val);
-               return section;
-           };
+       var serviceKeepRight = {
+         title: 'keepRight',
+         init: function init() {
+           _mainFileFetcher.get('keepRight').then(function (d) {
+             return _krData = d;
+           });

 
 

-           section.content = function(val) {
-               if (!arguments.length) { return _content; }
-               _content = val;
-               return section;
-           };
+           if (!_cache$2) {
+             this.reset();
+           }

 
 

-           section.disclosureContent = function(val) {
-               if (!arguments.length) { return _disclosureContent; }
-               _disclosureContent = val;
-               return section;
-           };
+           this.event = utilRebind(this, dispatch$7, 'on');
+         },
+         reset: function reset() {
+           if (_cache$2) {
+             Object.values(_cache$2.inflightTile).forEach(abortRequest$6);
+           }

 
 

-           section.disclosureExpanded = function(val) {
-               if (!arguments.length) { return _disclosureExpanded; }
-               _disclosureExpanded = val;
-               return section;
+           _cache$2 = {
+             data: {},
+             loadedTile: {},
+             inflightTile: {},
+             inflightPost: {},
+             closed: {},
+             rtree: new RBush()

            };
            };

+         },
+         // KeepRight API:  http://osm.mueschelsoft.de/keepright/interfacing.php
+         loadIssues: function loadIssues(projection) {
+           var _this = this;

 
 

-           // may be called multiple times
-           section.render = function(selection) {
+           var options = {
+             format: 'geojson',
+             ch: _krRuleset
+           }; // determine the needed tiles to cover the view

 
 

-               _containerSelection = selection
-                   .selectAll('.section-' + id)
-                   .data([0]);
+           var tiles = tiler$6.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed

 
 

-               var sectionEnter = _containerSelection
-                   .enter()
-                   .append('div')
-                   .attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
+           abortUnwantedRequests$3(_cache$2, tiles); // issue new requests..

 
 

-               _containerSelection = sectionEnter
-                   .merge(_containerSelection);
+           tiles.forEach(function (tile) {
+             if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;
+
+             var _tile$extent$rectangl = tile.extent.rectangle(),
+                 _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
+                 left = _tile$extent$rectangl2[0],
+                 top = _tile$extent$rectangl2[1],
+                 right = _tile$extent$rectangl2[2],
+                 bottom = _tile$extent$rectangl2[3];
+
+             var params = Object.assign({}, options, {
+               left: left,
+               bottom: bottom,
+               right: right,
+               top: top
+             });
+             var url = "".concat(_krUrlRoot, "/export.php?") + utilQsString(params);
+             var controller = new AbortController();
+             _cache$2.inflightTile[tile.id] = controller;
+             d3_json(url, {
+               signal: controller.signal
+             }).then(function (data) {
+               delete _cache$2.inflightTile[tile.id];
+               _cache$2.loadedTile[tile.id] = true;
+
+               if (!data || !data.features || !data.features.length) {
+                 throw new Error('No Data');
+               }
+
+               data.features.forEach(function (feature) {
+                 var _feature$properties = feature.properties,
+                     itemType = _feature$properties.error_type,
+                     id = _feature$properties.error_id,
+                     _feature$properties$c = _feature$properties.comment,
+                     comment = _feature$properties$c === void 0 ? null : _feature$properties$c,
+                     objectId = _feature$properties.object_id,
+                     objectType = _feature$properties.object_type,
+                     schema = _feature$properties.schema,
+                     title = _feature$properties.title;
+                 var loc = feature.geometry.coordinates,
+                     _feature$properties$d = feature.properties.description,
+                     description = _feature$properties$d === void 0 ? '' : _feature$properties$d; // if there is a parent, save its error type e.g.:
+                 //  Error 191 = "highway-highway"
+                 //  Error 190 = "intersections without junctions"  (parent)
+
+                 var issueTemplate = _krData.errorTypes[itemType];
+                 var parentIssueType = (Math.floor(itemType / 10) * 10).toString(); // try to handle error type directly, fallback to parent error type.
+
+                 var whichType = issueTemplate ? itemType : parentIssueType;
+                 var whichTemplate = _krData.errorTypes[whichType]; // Rewrite a few of the errors at this point..
+                 // This is done to make them easier to linkify and translate.
+
+                 switch (whichType) {
+                   case '170':
+                     description = "This feature has a FIXME tag: ".concat(description);
+                     break;

 
 

-               _containerSelection
-                   .call(renderContent);
-           };
+                   case '292':
+                   case '293':
+                     description = description.replace('A turn-', 'This turn-');
+                     break;

 
 

-           section.reRender = function() {
-               _containerSelection
-                   .call(renderContent);
-           };
+                   case '294':
+                   case '295':
+                   case '296':
+                   case '297':
+                   case '298':
+                     description = "This turn-restriction~".concat(description);
+                     break;

 
 

-           section.selection = function() {
-               return _containerSelection;
-           };
+                   case '300':
+                     description = 'This highway is missing a maxspeed tag';
+                     break;

 
 

-           section.disclosure = function() {
-               return _disclosure;
-           };
+                   case '411':
+                   case '412':
+                   case '413':
+                     description = "This feature~".concat(description);
+                     break;
+                 } // move markers slightly so it doesn't obscure the geometry,
+                 // then move markers away from other coincident markers
+
+
+                 var coincident = false;
+
+                 do {
+                   // first time, move marker up. after that, move marker right.
+                   var delta = coincident ? [0.00001, 0] : [0, 0.00001];
+                   loc = geoVecAdd(loc, delta);
+                   var bbox = geoExtent(loc).bbox();
+                   coincident = _cache$2.rtree.search(bbox).length;
+                 } while (coincident);
+
+                 var d = new QAItem(loc, _this, itemType, id, {
+                   comment: comment,
+                   description: description,
+                   whichType: whichType,
+                   parentIssueType: parentIssueType,
+                   severity: whichTemplate.severity || 'error',
+                   objectId: objectId,
+                   objectType: objectType,
+                   schema: schema,
+                   title: title
+                 });
+                 d.replacements = tokenReplacements(d);
+                 _cache$2.data[id] = d;

 
 

-           // may be called multiple times
-           function renderContent(selection) {
-               if (_shouldDisplay) {
-                   var shouldDisplay = _shouldDisplay();
-                   selection.classed('hide', !shouldDisplay);
-                   if (!shouldDisplay) {
-                       selection.html('');
-                       return;
-                   }
-               }
+                 _cache$2.rtree.insert(encodeIssueRtree$2(d));
+               });
+               dispatch$7.call('loaded');
+             })["catch"](function () {
+               delete _cache$2.inflightTile[tile.id];
+               _cache$2.loadedTile[tile.id] = true;
+             });
+           });
+         },
+         postUpdate: function postUpdate(d, callback) {
+           var _this2 = this;

 
 

-               if (_disclosureContent) {
-                   if (!_disclosure) {
-                       _disclosure = uiDisclosure(context, id.replace(/-/g, '_'), _expandedByDefault())
-                           .title(_title || '')
-                           /*.on('toggled', function(expanded) {
-                               if (expanded) { selection.node().parentNode.scrollTop += 200; }
-                           })*/
-                           .content(_disclosureContent);
-                   }
-                   if (_disclosureExpanded !== undefined) {
-                       _disclosure.expanded(_disclosureExpanded);
-                       _disclosureExpanded = undefined;
-                   }
-                   selection
-                       .call(_disclosure);
+           if (_cache$2.inflightPost[d.id]) {
+             return callback({
+               message: 'Error update already inflight',
+               status: -2
+             }, d);
+           }

 
 

-                   return;
-               }
+           var params = {
+             schema: d.schema,
+             id: d.id
+           };

 
 

-               if (_content) {
-                   selection
-                       .call(_content);
-               }
+           if (d.newStatus) {
+             params.st = d.newStatus;

            }
 
            }
 

-           return section;
-       }
+           if (d.newComment !== undefined) {
+             params.co = d.newComment;
+           } // NOTE: This throws a CORS err, but it seems successful.
+           // We don't care too much about the response, so this is fine.

 
 

-       // Pass `which` object of the form:
-       // {
-       //   key: 'string',     // required
-       //   value: 'string'    // optional
-       // }
-       //   -or-
-       // {
-       //   rtype: 'string'    // relation type  (e.g. 'multipolygon')
-       // }
-       //   -or-
-       // {
-       //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
-       // }
-       //
-       function uiTagReference(what) {
-           var wikibase = what.qid ? services.wikidata : services.osmWikibase;
-           var tagReference = {};

 
 

-           var _button = select(null);
-           var _body = select(null);
-           var _loaded;
-           var _showing;
+           var url = "".concat(_krUrlRoot, "/comment.php?") + utilQsString(params);
+           var controller = new AbortController();
+           _cache$2.inflightPost[d.id] = controller; // Since this is expected to throw an error just continue as if it worked
+           // (worst case scenario the request truly fails and issue will show up if iD restarts)

 
 

+           d3_json(url, {
+             signal: controller.signal
+           })["finally"](function () {
+             delete _cache$2.inflightPost[d.id];

 
 

-           function load() {
-               if (!wikibase) { return; }
+             if (d.newStatus === 'ignore') {
+               // ignore permanently (false positive)
+               _this2.removeItem(d);
+             } else if (d.newStatus === 'ignore_t') {
+               // ignore temporarily (error fixed)
+               _this2.removeItem(d);

 
 

-               _button
-                   .classed('tag-reference-loading', true);
+               _cache$2.closed["".concat(d.schema, ":").concat(d.id)] = true;
+             } else {
+               d = _this2.replaceItem(d.update({
+                 comment: d.newComment,
+                 newComment: undefined,
+                 newState: undefined
+               }));
+             }

 
 

-               wikibase.getDocs(what, gotDocs);
-           }
+             if (callback) callback(null, d);
+           });
+         },
+         // Get all cached QAItems covering the viewport
+         getItems: function getItems(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           return _cache$2.rtree.search(bbox).map(function (d) {
+             return d.data;
+           });
+         },
+         // Get a QAItem from cache
+         // NOTE: Don't change method name until UI v3 is merged
+         getError: function getError(id) {
+           return _cache$2.data[id];
+         },
+         // Replace a single QAItem in the cache
+         replaceItem: function replaceItem(item) {
+           if (!(item instanceof QAItem) || !item.id) return;
+           _cache$2.data[item.id] = item;
+           updateRtree$3(encodeIssueRtree$2(item), true); // true = replace

 
 

+           return item;
+         },
+         // Remove a single QAItem from the cache
+         removeItem: function removeItem(item) {
+           if (!(item instanceof QAItem) || !item.id) return;
+           delete _cache$2.data[item.id];
+           updateRtree$3(encodeIssueRtree$2(item), false); // false = remove
+         },
+         issueURL: function issueURL(item) {
+           return "".concat(_krUrlRoot, "/report_map.php?schema=").concat(item.schema, "&error=").concat(item.id);
+         },
+         // Get an array of issues closed during this session.
+         // Used to populate `closed:keepright` changeset tag
+         getClosedIDs: function getClosedIDs() {
+           return Object.keys(_cache$2.closed).sort();
+         }
+       };

 
 

-           function gotDocs(err, docs) {
-               _body.html('');
+       var tiler$5 = utilTiler();
+       var dispatch$6 = dispatch$8('loaded');
+       var _tileZoom$2 = 14;
+       var _impOsmUrls = {
+         ow: 'https://grab.community.improve-osm.org/directionOfFlowService',
+         mr: 'https://grab.community.improve-osm.org/missingGeoService',
+         tr: 'https://grab.community.improve-osm.org/turnRestrictionService'
+       };
+       var _impOsmData = {
+         icons: {}
+       }; // This gets reassigned if reset

 
 

-               if (!docs || !docs.title) {
-                   _body
-                       .append('p')
-                       .attr('class', 'tag-reference-description')
-                       .text(_t('inspector.no_documentation_key'));
-                   done();
-                   return;
-               }
+       var _cache$1;

 
 

-               if (docs.imageURL) {
-                   _body
-                       .append('img')
-                       .attr('class', 'tag-reference-wiki-image')
-                       .attr('src', docs.imageURL)
-                       .on('load', function() { done(); })
-                       .on('error', function() { select(this).remove(); done(); });
-               } else {
-                   done();
-               }
-
-               _body
-                   .append('p')
-                   .attr('class', 'tag-reference-description')
-                   .text(docs.description || _t('inspector.no_documentation_key'))
-                   .append('a')
-                   .attr('class', 'tag-reference-edit')
-                   .attr('target', '_blank')
-                   .attr('tabindex', -1)
-                   .attr('title', _t('inspector.edit_reference'))
-                   .attr('href', docs.editURL)
-                   .call(svgIcon('#iD-icon-edit', 'inline'));
-
-               if (docs.wiki) {
-                   _body
-                     .append('a')
-                     .attr('class', 'tag-reference-link')
-                     .attr('target', '_blank')
-                     .attr('tabindex', -1)
-                     .attr('href', docs.wiki.url)
-                     .call(svgIcon('#iD-icon-out-link', 'inline'))
-                     .append('span')
-                     .text(_t(docs.wiki.text));
-               }
-
-               // Add link to info about "good changeset comments" - #2923
-               if (what.key === 'comment') {
-                   _body
-                       .append('a')
-                       .attr('class', 'tag-reference-comment-link')
-                       .attr('target', '_blank')
-                       .attr('tabindex', -1)
-                       .call(svgIcon('#iD-icon-out-link', 'inline'))
-                       .attr('href', _t('commit.about_changeset_comments_link'))
-                       .append('span')
-                       .text(_t('commit.about_changeset_comments'));
-               }
+       function abortRequest$5(i) {
+         Object.values(i).forEach(function (controller) {
+           if (controller) {
+             controller.abort();

            }
            }

+         });
+       }

 
 

+       function abortUnwantedRequests$2(cache, tiles) {
+         Object.keys(cache.inflightTile).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k === tile.id;
+           });

 
 

-           function done() {
-               _loaded = true;
-
-               _button
-                   .classed('tag-reference-loading', false);
-
-               _body
-                   .classed('expanded', true)
-                   .transition()
-                   .duration(200)
-                   .style('max-height', '200px')
-                   .style('opacity', '1');
-
-               _showing = true;
-
-               _button.selectAll('svg.icon use').each(function() {
-                   var iconUse = select(this);
-                   if (iconUse.attr('href') === '#iD-icon-info') {
-                       iconUse.attr('href', '#iD-icon-info-filled');
-                   }
-               });
+           if (!wanted) {
+             abortRequest$5(cache.inflightTile[k]);
+             delete cache.inflightTile[k];

            }
            }

+         });
+       }

 
 

+       function encodeIssueRtree$1(d) {
+         return {
+           minX: d.loc[0],
+           minY: d.loc[1],
+           maxX: d.loc[0],
+           maxY: d.loc[1],
+           data: d
+         };
+       } // Replace or remove QAItem from rtree

 
 

-           function hide() {
-               _body
-                   .transition()
-                   .duration(200)
-                   .style('max-height', '0px')
-                   .style('opacity', '0')
-                   .on('end', function () {
-                       _body.classed('expanded', false);
-                   });
-
-               _showing = false;

 
 

-               _button.selectAll('svg.icon use').each(function() {
-                   var iconUse = select(this);
-                   if (iconUse.attr('href') === '#iD-icon-info-filled') {
-                       iconUse.attr('href', '#iD-icon-info');
-                   }
-               });
+       function updateRtree$2(item, replace) {
+         _cache$1.rtree.remove(item, function (a, b) {
+           return a.data.id === b.data.id;
+         });

 
 

-           }
+         if (replace) {
+           _cache$1.rtree.insert(item);
+         }
+       }

 
 

+       function linkErrorObject(d) {
+         return "<a class=\"error_object_link\">".concat(d, "</a>");
+       }

 
 

-           tagReference.button = function(selection, klass, iconName) {
-               _button = selection.selectAll('.tag-reference-button')
-                   .data([0]);
+       function linkEntity(d) {
+         return "<a class=\"error_entity_link\">".concat(d, "</a>");
+       }

 
 

-               _button = _button.enter()
-                   .append('button')
-                   .attr('class', 'tag-reference-button ' + klass)
-                   .attr('title', _t('icons.information'))
-                   .attr('tabindex', -1)
-                   .call(svgIcon('#iD-icon-' + (iconName || 'inspect')))
-                   .merge(_button);
+       function pointAverage(points) {
+         if (points.length) {
+           var sum = points.reduce(function (acc, point) {
+             return geoVecAdd(acc, [point.lon, point.lat]);
+           }, [0, 0]);
+           return geoVecScale(sum, 1 / points.length);
+         } else {
+           return [0, 0];
+         }
+       }

 
 

-               _button
-                   .on('click', function () {
-                       event.stopPropagation();
-                       event.preventDefault();
-                       this.blur();    // avoid keeping focus on the button - #4641
-                       if (_showing) {
-                           hide();
-                       } else if (_loaded) {
-                           done();
-                       } else {
-                           load();
-                       }
-                   });
-           };
+       function relativeBearing(p1, p2) {
+         var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);

 
 

+         if (angle < 0) {
+           angle += 2 * Math.PI;
+         } // Return degrees

 
 

-           tagReference.body = function(selection) {
-               var itemID = what.qid || what.rtype || (what.key + '-' + what.value);
-               _body = selection.selectAll('.tag-reference-body')
-                   .data([itemID], function(d) { return d; });

 
 

-               _body.exit()
-                   .remove();
+         return angle * 180 / Math.PI;
+       } // Assuming range [0,360)

 
 

-               _body = _body.enter()
-                   .append('div')
-                   .attr('class', 'tag-reference-body')
-                   .style('max-height', '0')
-                   .style('opacity', '0')
-                   .merge(_body);

 
 

-               if (_showing === false) {
-                   hide();
-               }
-           };
+       function cardinalDirection(bearing) {
+         var dir = 45 * Math.round(bearing / 45);
+         var compass = {
+           0: 'north',
+           45: 'northeast',
+           90: 'east',
+           135: 'southeast',
+           180: 'south',
+           225: 'southwest',
+           270: 'west',
+           315: 'northwest',
+           360: 'north'
+         };
+         return _t("QA.improveOSM.directions.".concat(compass[dir]));
+       } // Errors shouldn't obscure each other

 
 
 
 

-           tagReference.showing = function(val) {
-               if (!arguments.length) { return _showing; }
-               _showing = val;
-               return tagReference;
-           };
+       function preventCoincident$1(loc, bumpUp) {
+         var coincident = false;

 
 

+         do {
+           // first time, move marker up. after that, move marker right.
+           var delta = coincident ? [0.00001, 0] : bumpUp ? [0, 0.00001] : [0, 0];
+           loc = geoVecAdd(loc, delta);
+           var bbox = geoExtent(loc).bbox();
+           coincident = _cache$1.rtree.search(bbox).length;
+         } while (coincident);

 
 

-           return tagReference;
+         return loc;

        }
 
        }
 

-       function uiSectionRawTagEditor(id, context) {
-
-           var section = uiSection(id, context)
-               .classes('raw-tag-editor')
-               .title(function() {
-                   var count = Object.keys(_tags).filter(function(d) { return d; }).length;
-                   return _t('inspector.title_count', { title: _t('inspector.tags'), count: count });
-               })
-               .expandedByDefault(false)
-               .disclosureContent(renderDisclosureContent);
-
-           var taginfo = services.taginfo;
-           var dispatch$1 = dispatch('change');
-           var availableViews = [
-               { id: 'text', icon: '#fas-i-cursor' },
-               { id: 'list', icon: '#fas-th-list' }
-           ];
-
-           var _tagView = (corePreferences('raw-tag-editor-view') || 'list');   // 'list, 'text'
-           var _readOnlyTags = [];
-           // the keys in the order we want them to display
-           var _orderedKeys = [];
-           var _showBlank = false;
-           var _pendingChange = null;
-           var _state;
-           var _presets;
-           var _tags;
-           var _entityIDs;
-
-           function renderDisclosureContent(wrap) {
-
-               // remove deleted keys
-               _orderedKeys = _orderedKeys.filter(function(key) {
-                   return _tags[key] !== undefined;
-               });
+       var serviceImproveOSM = {
+         title: 'improveOSM',
+         init: function init() {
+           _mainFileFetcher.get('qa_data').then(function (d) {
+             return _impOsmData = d.improveOSM;
+           });

 
 

-               // When switching to a different entity or changing the state (hover/select)
-               // reorder the keys alphabetically.
-               // We trigger this by emptying the `_orderedKeys` array, then it will be rebuilt here.
-               // Otherwise leave their order alone - #5857, #5927
-               var all = Object.keys(_tags).sort();
-               var missingKeys = utilArrayDifference(all, _orderedKeys);
-               for (var i in missingKeys) {
-                   _orderedKeys.push(missingKeys[i]);
-               }
+           if (!_cache$1) {
+             this.reset();
+           }

 
 

-               // assemble row data
-               var rowData = _orderedKeys.map(function(key, i) {
-                   return { index: i, key: key, value: _tags[key] };
-               });
+           this.event = utilRebind(this, dispatch$6, 'on');
+         },
+         reset: function reset() {
+           if (_cache$1) {
+             Object.values(_cache$1.inflightTile).forEach(abortRequest$5);
+           }

 
 

-               // append blank row last, if necessary
-               if (!rowData.length || _showBlank) {
-                   _showBlank = false;
-                   rowData.push({ index: rowData.length, key: '', value: '' });
-               }
+           _cache$1 = {
+             data: {},
+             loadedTile: {},
+             inflightTile: {},
+             inflightPost: {},
+             closed: {},
+             rtree: new RBush()
+           };
+         },
+         loadIssues: function loadIssues(projection) {
+           var _this = this;

 
 

+           var options = {
+             client: 'iD',
+             status: 'OPEN',
+             zoom: '19' // Use a high zoom so that clusters aren't returned

 
 

-               // View Options
-               var options = wrap.selectAll('.raw-tag-options')
-                   .data([0]);
+           }; // determine the needed tiles to cover the view

 
 

-               options.exit()
-                   .remove();
+           var tiles = tiler$5.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed

 
 

-               var optionsEnter = options.enter()
-                   .insert('div', ':first-child')
-                   .attr('class', 'raw-tag-options');
+           abortUnwantedRequests$2(_cache$1, tiles); // issue new requests..

 
 

-               var optionEnter = optionsEnter.selectAll('.raw-tag-option')
-                   .data(availableViews, function(d) { return d.id; })
-                   .enter();
+           tiles.forEach(function (tile) {
+             if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) return;
+
+             var _tile$extent$rectangl = tile.extent.rectangle(),
+                 _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
+                 east = _tile$extent$rectangl2[0],
+                 north = _tile$extent$rectangl2[1],
+                 west = _tile$extent$rectangl2[2],
+                 south = _tile$extent$rectangl2[3];
+
+             var params = Object.assign({}, options, {
+               east: east,
+               south: south,
+               west: west,
+               north: north
+             }); // 3 separate requests to store for each tile

 
 

-               optionEnter
-                   .append('button')
-                   .attr('class', function(d) {
-                       return 'raw-tag-option raw-tag-option-' + d.id + (_tagView === d.id ? ' selected' : '');
-                   })
-                   .attr('title', function(d) { return _t('icons.' + d.id); })
-                   .on('click', function(d) {
-                       _tagView = d.id;
-                       corePreferences('raw-tag-editor-view', d.id);
+             var requests = {};
+             Object.keys(_impOsmUrls).forEach(function (k) {
+               // We exclude WATER from missing geometry as it doesn't seem useful
+               // We use most confident one-way and turn restrictions only, still have false positives
+               var kParams = Object.assign({}, params, k === 'mr' ? {
+                 type: 'PARKING,ROAD,BOTH,PATH'
+               } : {
+                 confidenceLevel: 'C1'
+               });
+               var url = "".concat(_impOsmUrls[k], "/search?") + utilQsString(kParams);
+               var controller = new AbortController();
+               requests[k] = controller;
+               d3_json(url, {
+                 signal: controller.signal
+               }).then(function (data) {
+                 delete _cache$1.inflightTile[tile.id][k];
+
+                 if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
+                   delete _cache$1.inflightTile[tile.id];
+                   _cache$1.loadedTile[tile.id] = true;
+                 } // Road segments at high zoom == oneways
+
+
+                 if (data.roadSegments) {
+                   data.roadSegments.forEach(function (feature) {
+                     // Position error at the approximate middle of the segment
+                     var points = feature.points,
+                         wayId = feature.wayId,
+                         fromNodeId = feature.fromNodeId,
+                         toNodeId = feature.toNodeId;
+                     var itemId = "".concat(wayId).concat(fromNodeId).concat(toNodeId);
+                     var mid = points.length / 2;
+                     var loc; // Even number of points, find midpoint of the middle two
+                     // Odd number of points, use position of very middle point
+
+                     if (mid % 1 === 0) {
+                       loc = pointAverage([points[mid - 1], points[mid]]);
+                     } else {
+                       mid = points[Math.floor(mid)];
+                       loc = [mid.lon, mid.lat];
+                     } // One-ways can land on same segment in opposite direction
+
+
+                     loc = preventCoincident$1(loc, false);
+                     var d = new QAItem(loc, _this, k, itemId, {
+                       issueKey: k,
+                       // used as a category
+                       identifier: {
+                         // used to post changes
+                         wayId: wayId,
+                         fromNodeId: fromNodeId,
+                         toNodeId: toNodeId
+                       },
+                       objectId: wayId,
+                       objectType: 'way'
+                     }); // Variables used in the description
+
+                     d.replacements = {
+                       percentage: feature.percentOfTrips,
+                       num_trips: feature.numberOfTrips,
+                       highway: linkErrorObject(_t('QA.keepRight.error_parts.highway')),
+                       from_node: linkEntity('n' + feature.fromNodeId),
+                       to_node: linkEntity('n' + feature.toNodeId)
+                     };
+                     _cache$1.data[d.id] = d;
+
+                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
+                   });
+                 } // Tiles at high zoom == missing roads
+
+
+                 if (data.tiles) {
+                   data.tiles.forEach(function (feature) {
+                     var type = feature.type,
+                         x = feature.x,
+                         y = feature.y,
+                         numberOfTrips = feature.numberOfTrips;
+                     var geoType = type.toLowerCase();
+                     var itemId = "".concat(geoType).concat(x).concat(y).concat(numberOfTrips); // Average of recorded points should land on the missing geometry
+                     // Missing geometry could happen to land on another error
+
+                     var loc = pointAverage(feature.points);
+                     loc = preventCoincident$1(loc, false);
+                     var d = new QAItem(loc, _this, "".concat(k, "-").concat(geoType), itemId, {
+                       issueKey: k,
+                       identifier: {
+                         x: x,
+                         y: y
+                       }
+                     });
+                     d.replacements = {
+                       num_trips: numberOfTrips,
+                       geometry_type: _t("QA.improveOSM.geometry_types.".concat(geoType))
+                     }; // -1 trips indicates data came from a 3rd party

 
 

-                       wrap.selectAll('.raw-tag-option')
-                           .classed('selected', function(datum) { return datum === d; });
+                     if (numberOfTrips === -1) {
+                       d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
+                     }

 
 

-                       wrap.selectAll('.tag-text')
-                           .classed('hide', (d.id !== 'text'))
-                           .each(setTextareaHeight);
+                     _cache$1.data[d.id] = d;

 
 

-                       wrap.selectAll('.tag-list, .add-row')
-                           .classed('hide', (d.id !== 'list'));
-                   })
-                   .each(function(d) {
-                       select(this)
-                           .call(svgIcon(d.icon));
+                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
+                   });
+                 } // Entities at high zoom == turn restrictions
+
+
+                 if (data.entities) {
+                   data.entities.forEach(function (feature) {
+                     var point = feature.point,
+                         id = feature.id,
+                         segments = feature.segments,
+                         numberOfPasses = feature.numberOfPasses,
+                         turnType = feature.turnType;
+                     var itemId = "".concat(id.replace(/[,:+#]/g, '_')); // Turn restrictions could be missing at same junction
+                     // We also want to bump the error up so node is accessible
+
+                     var loc = preventCoincident$1([point.lon, point.lat], true); // Elements are presented in a strange way
+
+                     var ids = id.split(',');
+                     var from_way = ids[0];
+                     var via_node = ids[3];
+                     var to_way = ids[2].split(':')[1];
+                     var d = new QAItem(loc, _this, k, itemId, {
+                       issueKey: k,
+                       identifier: id,
+                       objectId: via_node,
+                       objectType: 'node'
+                     }); // Travel direction along from_way clarifies the turn restriction
+
+                     var _segments$0$points = _slicedToArray(segments[0].points, 2),
+                         p1 = _segments$0$points[0],
+                         p2 = _segments$0$points[1];
+
+                     var dir_of_travel = cardinalDirection(relativeBearing(p1, p2)); // Variables used in the description
+
+                     d.replacements = {
+                       num_passed: numberOfPasses,
+                       num_trips: segments[0].numberOfTrips,
+                       turn_restriction: turnType.toLowerCase(),
+                       from_way: linkEntity('w' + from_way),
+                       to_way: linkEntity('w' + to_way),
+                       travel_direction: dir_of_travel,
+                       junction: linkErrorObject(_t('QA.keepRight.error_parts.this_node'))
+                     };
+                     _cache$1.data[d.id] = d;
+
+                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
+
+                     dispatch$6.call('loaded');

                    });
                    });

+                 }
+               })["catch"](function () {
+                 delete _cache$1.inflightTile[tile.id][k];

 
 

+                 if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
+                   delete _cache$1.inflightTile[tile.id];
+                   _cache$1.loadedTile[tile.id] = true;
+                 }
+               });
+             });
+             _cache$1.inflightTile[tile.id] = requests;
+           });
+         },
+         getComments: function getComments(item) {
+           var _this2 = this;

 
 

-               // View as Text
-               var textData = rowsToText(rowData);
-               var textarea = wrap.selectAll('.tag-text')
-                   .data([0]);
+           // If comments already retrieved no need to do so again
+           if (item.comments) {
+             return Promise.resolve(item);
+           }

 
 

-               textarea = textarea.enter()
-                   .append('textarea')
-                   .attr('class', 'tag-text' + (_tagView !== 'text' ? ' hide' : ''))
-                   .call(utilNoAuto)
-                   .attr('placeholder', _t('inspector.key_value'))
-                   .attr('spellcheck', 'false')
-                   .merge(textarea);
+           var key = item.issueKey;
+           var qParams = {};

 
 

-               textarea
-                   .call(utilGetSetValue, textData)
-                   .each(setTextareaHeight)
-                   .on('input', setTextareaHeight)
-                   .on('blur', textChanged)
-                   .on('change', textChanged);
+           if (key === 'ow') {
+             qParams = item.identifier;
+           } else if (key === 'mr') {
+             qParams.tileX = item.identifier.x;
+             qParams.tileY = item.identifier.y;
+           } else if (key === 'tr') {
+             qParams.targetId = item.identifier;
+           }

 
 

+           var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);

 
 

-               // View as List
-               var list = wrap.selectAll('.tag-list')
-                   .data([0]);
+           var cacheComments = function cacheComments(data) {
+             // Assign directly for immediate use afterwards
+             // comments are served newest to oldest
+             item.comments = data.comments ? data.comments.reverse() : [];

 
 

-               list = list.enter()
-                   .append('ul')
-                   .attr('class', 'tag-list' + (_tagView !== 'list' ? ' hide' : ''))
-                   .merge(list);
+             _this2.replaceItem(item);
+           };

 
 

+           return d3_json(url).then(cacheComments).then(function () {
+             return item;
+           });
+         },
+         postUpdate: function postUpdate(d, callback) {
+           if (!serviceOsm.authenticated()) {
+             // Username required in payload
+             return callback({
+               message: 'Not Authenticated',
+               status: -3
+             }, d);
+           }

 
 

-               // Container for the Add button
-               var addRowEnter = wrap.selectAll('.add-row')
-                   .data([0])
-                   .enter()
-                   .append('div')
-                   .attr('class', 'add-row' + (_tagView !== 'list' ? ' hide' : ''));
+           if (_cache$1.inflightPost[d.id]) {
+             return callback({
+               message: 'Error update already inflight',
+               status: -2
+             }, d);
+           } // Payload can only be sent once username is established

 
 

-               addRowEnter
-                   .append('button')
-                   .attr('class', 'add-tag')
-                   .call(svgIcon('#iD-icon-plus', 'light'))
-                   .on('click', addTag);

 
 

-               addRowEnter
-                   .append('div')
-                   .attr('class', 'space-value');   // preserve space
+           serviceOsm.userDetails(sendPayload.bind(this));

 
 

-               addRowEnter
-                   .append('div')
-                   .attr('class', 'space-buttons');  // preserve space
+           function sendPayload(err, user) {
+             var _this3 = this;

 
 

+             if (err) {
+               return callback(err, d);
+             }

 
 

-               // Tag list items
-               var items = list.selectAll('.tag-row')
-                   .data(rowData, function(d) { return d.key; });
+             var key = d.issueKey;
+             var url = "".concat(_impOsmUrls[key], "/comment");
+             var payload = {
+               username: user.display_name,
+               targetIds: [d.identifier]
+             };

 
 

-               items.exit()
-                   .each(unbind)
-                   .remove();
+             if (d.newStatus) {
+               payload.status = d.newStatus;
+               payload.text = 'status changed';
+             } // Comment take place of default text

 
 
 
 

-               // Enter
-               var itemsEnter = items.enter()
-                   .append('li')
-                   .attr('class', 'tag-row')
-                   .classed('readonly', isReadOnly);
+             if (d.newComment) {
+               payload.text = d.newComment;
+             }

 
 

-               var innerWrap = itemsEnter.append('div')
-                   .attr('class', 'inner-wrap');
+             var controller = new AbortController();
+             _cache$1.inflightPost[d.id] = controller;
+             var options = {
+               method: 'POST',
+               signal: controller.signal,
+               body: JSON.stringify(payload)
+             };
+             d3_json(url, options).then(function () {
+               delete _cache$1.inflightPost[d.id]; // Just a comment, update error in cache
+
+               if (!d.newStatus) {
+                 var now = new Date();
+                 var comments = d.comments ? d.comments : [];
+                 comments.push({
+                   username: payload.username,
+                   text: payload.text,
+                   timestamp: now.getTime() / 1000
+                 });

 
 

-               innerWrap
-                   .append('div')
-                   .attr('class', 'key-wrap')
-                   .append('input')
-                   .property('type', 'text')
-                   .attr('class', 'key')
-                   .call(utilNoAuto)
-                   .on('blur', keyChange)
-                   .on('change', keyChange);
-
-               innerWrap
-                   .append('div')
-                   .attr('class', 'value-wrap')
-                   .append('input')
-                   .property('type', 'text')
-                   .attr('class', 'value')
-                   .call(utilNoAuto)
-                   .on('blur', valueChange)
-                   .on('change', valueChange)
-                   .on('keydown.push-more', pushMore);
-
-               innerWrap
-                   .append('button')
-                   .attr('tabindex', -1)
-                   .attr('class', 'form-field-button remove')
-                   .attr('title', _t('icons.remove'))
-                   .call(svgIcon('#iD-operation-delete'));
-
-
-               // Update
-               items = items
-                   .merge(itemsEnter)
-                   .sort(function(a, b) { return a.index - b.index; });
-
-               items
-                   .each(function(d) {
-                       var row = select(this);
-                       var key = row.select('input.key');      // propagate bound data
-                       var value = row.select('input.value');  // propagate bound data
-
-                       if (_entityIDs && taginfo && _state !== 'hover') {
-                           bindTypeahead(key, value);
-                       }
+                 _this3.replaceItem(d.update({
+                   comments: comments,
+                   newComment: undefined
+                 }));
+               } else {
+                 _this3.removeItem(d);

 
 

-                       var reference;
+                 if (d.newStatus === 'SOLVED') {
+                   // Keep track of the number of issues closed per type to tag the changeset
+                   if (!(d.issueKey in _cache$1.closed)) {
+                     _cache$1.closed[d.issueKey] = 0;
+                   }

 
 

-                       if (typeof d.value !== 'string') {
-                           reference = uiTagReference({ key: d.key });
-                       } else {
-                           var isRelation = _entityIDs && _entityIDs.some(function(entityID) {
-                               return context.entity(entityID).type === 'relation';
-                           });
-                           if (isRelation && d.key === 'type') {
-                               reference = uiTagReference({ rtype: d.value });
-                           } else {
-                               reference = uiTagReference({ key: d.key, value: d.value });
-                           }
-                       }
+                   _cache$1.closed[d.issueKey] += 1;
+                 }
+               }

 
 

-                       if (_state === 'hover') {
-                           reference.showing(false);
-                       }
+               if (callback) callback(null, d);
+             })["catch"](function (err) {
+               delete _cache$1.inflightPost[d.id];
+               if (callback) callback(err.message);
+             });
+           }
+         },
+         // Get all cached QAItems covering the viewport
+         getItems: function getItems(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           return _cache$1.rtree.search(bbox).map(function (d) {
+             return d.data;
+           });
+         },
+         // Get a QAItem from cache
+         // NOTE: Don't change method name until UI v3 is merged
+         getError: function getError(id) {
+           return _cache$1.data[id];
+         },
+         // get the name of the icon to display for this item
+         getIcon: function getIcon(itemType) {
+           return _impOsmData.icons[itemType];
+         },
+         // Replace a single QAItem in the cache
+         replaceItem: function replaceItem(issue) {
+           if (!(issue instanceof QAItem) || !issue.id) return;
+           _cache$1.data[issue.id] = issue;
+           updateRtree$2(encodeIssueRtree$1(issue), true); // true = replace

 
 

-                       row.select('.inner-wrap')      // propagate bound data
-                           .call(reference.button);
+           return issue;
+         },
+         // Remove a single QAItem from the cache
+         removeItem: function removeItem(issue) {
+           if (!(issue instanceof QAItem) || !issue.id) return;
+           delete _cache$1.data[issue.id];
+           updateRtree$2(encodeIssueRtree$1(issue), false); // false = remove
+         },
+         // Used to populate `closed:improveosm:*` changeset tags
+         getClosedCounts: function getClosedCounts() {
+           return _cache$1.closed;
+         }
+       };

 
 

-                       row.call(reference.body);
+       var defaults$5 = {exports: {}};

 
 

-                       row.select('button.remove');   // propagate bound data
-                   });
+       function getDefaults$1() {
+         return {
+           baseUrl: null,
+           breaks: false,
+           gfm: true,
+           headerIds: true,
+           headerPrefix: '',
+           highlight: null,
+           langPrefix: 'language-',
+           mangle: true,
+           pedantic: false,
+           renderer: null,
+           sanitize: false,
+           sanitizer: null,
+           silent: false,
+           smartLists: false,
+           smartypants: false,
+           tokenizer: null,
+           walkTokens: null,
+           xhtml: false
+         };
+       }

 
 

-               items.selectAll('input.key')
-                   .attr('title', function(d) { return d.key; })
-                   .call(utilGetSetValue, function(d) { return d.key; })
-                   .attr('readonly', function(d) {
-                       return (isReadOnly(d) || (typeof d.value !== 'string')) || null;
-                   });
+       function changeDefaults$1(newDefaults) {
+         defaults$5.exports.defaults = newDefaults;
+       }

 
 

-               items.selectAll('input.value')
-                   .attr('title', function(d) {
-                       return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : d.value;
-                   })
-                   .classed('mixed', function(d) {
-                       return Array.isArray(d.value);
-                   })
-                   .attr('placeholder', function(d) {
-                       return typeof d.value === 'string' ? null : _t('inspector.multiple_values');
-                   })
-                   .call(utilGetSetValue, function(d) {
-                       return typeof d.value === 'string' ? d.value : '';
-                   })
-                   .attr('readonly', function(d) {
-                       return isReadOnly(d) || null;
-                   });
+       defaults$5.exports = {
+         defaults: getDefaults$1(),
+         getDefaults: getDefaults$1,
+         changeDefaults: changeDefaults$1
+       };

 
 

-               items.selectAll('button.remove')
-                   .on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'down', removeTag);  // 'click' fires too late - #5878
+       var escapeTest = /[&<>"']/;
+       var escapeReplace = /[&<>"']/g;
+       var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
+       var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
+       var escapeReplacements = {
+         '&': '&amp;',
+         '<': '&lt;',
+         '>': '&gt;',
+         '"': '&quot;',
+         "'": '&#39;'
+       };

 
 

-           }
+       var getEscapeReplacement = function getEscapeReplacement(ch) {
+         return escapeReplacements[ch];
+       };

 
 

-           function isReadOnly(d) {
-               for (var i = 0; i < _readOnlyTags.length; i++) {
-                   if (d.key.match(_readOnlyTags[i]) !== null) {
-                       return true;
-                   }
-               }
-               return false;
+       function escape$3(html, encode) {
+         if (encode) {
+           if (escapeTest.test(html)) {
+             return html.replace(escapeReplace, getEscapeReplacement);

            }
            }

-
-           function setTextareaHeight() {
-               if (_tagView !== 'text') { return; }
-
-               var selection = select(this);
-               selection.style('height', null);
-               selection.style('height', selection.node().scrollHeight + 5 + 'px');
+         } else {
+           if (escapeTestNoEncode.test(html)) {
+             return html.replace(escapeReplaceNoEncode, getEscapeReplacement);

            }
            }

+         }

 
 

-           function stringify(s) {
-               return JSON.stringify(s).slice(1, -1);   // without leading/trailing "
-           }
+         return html;
+       }

 
 

-           function unstringify(s) {
-               var leading = '';
-               var trailing = '';
-               if (s.length < 1 || s.charAt(0) !== '"') {
-                   leading = '"';
-               }
-               if (s.length < 2 || s.charAt(s.length - 1) !== '"' ||
-                   (s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\')
-               ) {
-                   trailing = '"';
-               }
-               return JSON.parse(leading + s + trailing);
-           }
+       var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;

 
 

-           function rowsToText(rows) {
-               var str = rows
-                   .filter(function(row) { return row.key && row.key.trim() !== ''; })
-                   .map(function(row) {
-                       var rawVal = row.value;
-                       if (typeof rawVal !== 'string') { rawVal = '*'; }
-                       var val = rawVal ? stringify(rawVal) : '';
-                       return stringify(row.key) + '=' + val;
-                   })
-                   .join('\n');
+       function unescape$2(html) {
+         // explicitly match decimal, hex, and named HTML entities
+         return html.replace(unescapeTest, function (_, n) {
+           n = n.toLowerCase();
+           if (n === 'colon') return ':';

 
 

-               if (_state !== 'hover' && str.length) {
-                   return str + '\n';
-               }
-               return  str;
+           if (n.charAt(0) === '#') {
+             return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));

            }
 
            }
 

-           function textChanged() {
-               var newText = this.value.trim();
-               var newTags = {};
-               newText.split('\n').forEach(function(row) {
-                   var m = row.match(/^\s*([^=]+)=(.*)$/);
-                   if (m !== null) {
-                       var k = context.cleanTagKey(unstringify(m[1].trim()));
-                       var v = context.cleanTagValue(unstringify(m[2].trim()));
-                       newTags[k] = v;
-                   }
-               });
-
-               var tagDiff = utilTagDiff(_tags, newTags);
-               if (!tagDiff.length) { return; }
-
-               _pendingChange  = _pendingChange || {};
+           return '';
+         });
+       }

 
 

-               tagDiff.forEach(function(change) {
-                   if (isReadOnly({ key: change.key })) { return; }
+       var caret = /(^|[^\[])\^/g;

 
 

-                   // skip unchanged multiselection placeholders
-                   if (change.newVal === '*' && typeof change.oldVal !== 'string') { return; }
+       function edit$1(regex, opt) {
+         regex = regex.source || regex;
+         opt = opt || '';
+         var obj = {
+           replace: function replace(name, val) {
+             val = val.source || val;
+             val = val.replace(caret, '$1');
+             regex = regex.replace(name, val);
+             return obj;
+           },
+           getRegex: function getRegex() {
+             return new RegExp(regex, opt);
+           }
+         };
+         return obj;
+       }

 
 

-                   if (change.type === '-') {
-                       _pendingChange[change.key] = undefined;
-                   } else if (change.type === '+') {
-                       _pendingChange[change.key] = change.newVal || '';
-                   }
-               });
+       var nonWordAndColonTest = /[^\w:]/g;
+       var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;

 
 

-               if (Object.keys(_pendingChange).length === 0) {
-                   _pendingChange = null;
-                   return;
-               }
+       function cleanUrl$1(sanitize, base, href) {
+         if (sanitize) {
+           var prot;

 
 

-               scheduleChange();
+           try {
+             prot = decodeURIComponent(unescape$2(href)).replace(nonWordAndColonTest, '').toLowerCase();
+           } catch (e) {
+             return null;

            }
 
            }
 

-           function pushMore() {
-               // if pressing Tab on the last value field with content, add a blank row
-               if (event.keyCode === 9 && !event.shiftKey &&
-                   section.selection().selectAll('.tag-list li:last-child input.value').node() === this &&
-                   utilGetSetValue(select(this))) {
-                   addTag();
-               }
+           if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
+             return null;

            }
            }

+         }

 
 

-           function bindTypeahead(key, value) {
-               if (isReadOnly(key.datum())) { return; }
-
-               if (Array.isArray(value.datum().value)) {
-                   value.call(uiCombobox(context, 'tag-value')
-                       .minItems(1)
-                       .fetcher(function(value, callback) {
-                           var keyString = utilGetSetValue(key);
-                           if (!_tags[keyString]) { return; }
-                           var data = _tags[keyString].filter(Boolean).map(function(tagValue) {
-                               return {
-                                   value: tagValue,
-                                   title: tagValue
-                               };
-                           });
-                           callback(data);
-                       }));
-                   return;
-               }
-
-               var geometry = context.graph().geometry(_entityIDs[0]);
+         if (base && !originIndependentUrl.test(href)) {
+           href = resolveUrl$2(base, href);
+         }

 
 

-               key.call(uiCombobox(context, 'tag-key')
-                   .fetcher(function(value, callback) {
-                       taginfo.keys({
-                           debounce: true,
-                           geometry: geometry,
-                           query: value
-                       }, function(err, data) {
-                           if (!err) {
-                               var filtered = data.filter(function(d) { return _tags[d.value] === undefined; });
-                               callback(sort(value, filtered));
-                           }
-                       });
-                   }));
+         try {
+           href = encodeURI(href).replace(/%25/g, '%');
+         } catch (e) {
+           return null;
+         }

 
 

-               value.call(uiCombobox(context, 'tag-value')
-                   .fetcher(function(value, callback) {
-                       taginfo.values({
-                           debounce: true,
-                           key: utilGetSetValue(key),
-                           geometry: geometry,
-                           query: value
-                       }, function(err, data) {
-                           if (!err) { callback(sort(value, data)); }
-                       });
-                   }));
+         return href;
+       }

 
 

+       var baseUrls = {};
+       var justDomain = /^[^:]+:\/*[^/]*$/;
+       var protocol = /^([^:]+:)[\s\S]*$/;
+       var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;

 
 

-               function sort(value, data) {
-                   var sameletter = [];
-                   var other = [];
-                   for (var i = 0; i < data.length; i++) {
-                       if (data[i].value.substring(0, value.length) === value) {
-                           sameletter.push(data[i]);
-                       } else {
-                           other.push(data[i]);
-                       }
-                   }
-                   return sameletter.concat(other);
-               }
+       function resolveUrl$2(base, href) {
+         if (!baseUrls[' ' + base]) {
+           // we can ignore everything in base after the last slash of its path component,
+           // but we might need to add _that_
+           // https://tools.ietf.org/html/rfc3986#section-3
+           if (justDomain.test(base)) {
+             baseUrls[' ' + base] = base + '/';
+           } else {
+             baseUrls[' ' + base] = rtrim$1(base, '/', true);

            }
            }

+         }

 
 

-           function unbind() {
-               var row = select(this);
-
-               row.selectAll('input.key')
-                   .call(uiCombobox.off, context);
+         base = baseUrls[' ' + base];
+         var relativeBase = base.indexOf(':') === -1;

 
 

-               row.selectAll('input.value')
-                   .call(uiCombobox.off, context);
+         if (href.substring(0, 2) === '//') {
+           if (relativeBase) {
+             return href;

            }
 
            }
 

-           function keyChange(d) {
-               if (select(this).attr('readonly')) { return; }
-
-               var kOld = d.key;
-
-               // exit if we are currently about to delete this row anyway - #6366
-               if (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) { return; }
-
-               var kNew = context.cleanTagKey(this.value.trim());
-
-               // allow no change if the key should be readonly
-               if (isReadOnly({ key: kNew })) {
-                   this.value = kOld;
-                   return;
-               }
-
-               if (kNew &&
-                   kNew !== kOld &&
-                   _tags[kNew] !== undefined) {
-                   // new key is already in use, switch focus to the existing row
-
-                   this.value = kOld;                // reset the key
-                   section.selection().selectAll('.tag-list input.value')
-                       .each(function(d) {
-                           if (d.key === kNew) {     // send focus to that other value combo instead
-                               var input = select(this).node();
-                               input.focus();
-                               input.select();
-                           }
-                       });
-                   return;
-               }
-
-
-               var row = this.parentNode.parentNode;
-               var inputVal = select(row).selectAll('input.value');
-               var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
-
-               _pendingChange = _pendingChange || {};
-
-               if (kOld) {
-                   _pendingChange[kOld] = undefined;
-               }
-
-               _pendingChange[kNew] = vNew;
-
-               // update the ordered key index so this row doesn't change position
-               var existingKeyIndex = _orderedKeys.indexOf(kOld);
-               if (existingKeyIndex !== -1) { _orderedKeys[existingKeyIndex] = kNew; }
-
-               d.key = kNew;    // update datum to avoid exit/enter on tag update
-               d.value = vNew;
-
-               this.value = kNew;
-               utilGetSetValue(inputVal, vNew);
-               scheduleChange();
+           return base.replace(protocol, '$1') + href;
+         } else if (href.charAt(0) === '/') {
+           if (relativeBase) {
+             return href;

            }
 
            }
 

-           function valueChange(d) {
-               if (isReadOnly(d)) { return; }
+           return base.replace(domain, '$1') + href;
+         } else {
+           return base + href;
+         }
+       }

 
 

-               // exit if this is a multiselection and no value was entered
-               if (typeof d.value !== 'string' && !this.value) { return; }
+       var noopTest$1 = {
+         exec: function noopTest() {}
+       };

 
 

-               // exit if we are currently about to delete this row anyway - #6366
-               if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) { return; }
+       function merge$2(obj) {
+         var i = 1,
+             target,
+             key;

 
 

-               _pendingChange = _pendingChange || {};
+         for (; i < arguments.length; i++) {
+           target = arguments[i];

 
 

-               _pendingChange[d.key] = context.cleanTagValue(this.value);
-               scheduleChange();
+           for (key in target) {
+             if (Object.prototype.hasOwnProperty.call(target, key)) {
+               obj[key] = target[key];
+             }

            }
            }

+         }

 
 

-           function removeTag(d) {
-               if (isReadOnly(d)) { return; }
-
-               if (d.key === '') {    // removing the blank row
-                   _showBlank = false;
-                   section.reRender();
+         return obj;
+       }

 
 

-               } else {
-                   // remove the key from the ordered key index
-                   _orderedKeys = _orderedKeys.filter(function(key) { return key !== d.key; });
+       function splitCells$1(tableRow, count) {
+         // ensure that every cell-delimiting pipe has a space
+         // before it to distinguish it from an escaped pipe
+         var row = tableRow.replace(/\|/g, function (match, offset, str) {
+           var escaped = false,
+               curr = offset;

 
 

-                   _pendingChange  = _pendingChange || {};
-                   _pendingChange[d.key] = undefined;
-                   scheduleChange();
-               }
+           while (--curr >= 0 && str[curr] === '\\') {
+             escaped = !escaped;

            }
 
            }
 

-           function addTag() {
-               // Delay render in case this click is blurring an edited combo.
-               // Without the setTimeout, the `content` render would wipe out the pending tag change.
-               window.setTimeout(function() {
-                   _showBlank = true;
-                   section.reRender();
-                   section.selection().selectAll('.tag-list li:last-child input.key').node().focus();
-               }, 20);
+           if (escaped) {
+             // odd number of slashes means | is escaped
+             // so we leave it alone
+             return '|';
+           } else {
+             // add space before unescaped |
+             return ' |';

            }
            }

+         }),
+             cells = row.split(/ \|/);
+         var i = 0;

 
 

-           function scheduleChange() {
-               // Cache IDs in case the editor is reloaded before the change event is called. - #6028
-               var entityIDs = _entityIDs;
-
-               // Delay change in case this change is blurring an edited combo. - #5878
-               window.setTimeout(function() {
-                   if (!_pendingChange) { return; }
-
-                   dispatch$1.call('change', this, entityIDs, _pendingChange);
-                   _pendingChange = null;
-               }, 10);
+         if (cells.length > count) {
+           cells.splice(count);
+         } else {
+           while (cells.length < count) {
+             cells.push('');

            }
            }

+         }

 
 

+         for (; i < cells.length; i++) {
+           // leading or trailing whitespace is ignored per the gfm spec
+           cells[i] = cells[i].trim().replace(/\\\|/g, '|');
+         }

 
 

-           section.state = function(val) {
-               if (!arguments.length) { return _state; }
-               if (_state !== val) {
-                   _orderedKeys = [];
-                   _state = val;
-               }
-               return section;
-           };
-
-
-           section.presets = function(val) {
-               if (!arguments.length) { return _presets; }
-               _presets = val;
-               if (_presets && _presets.length && _presets[0].isFallback()) {
-                   section.disclosureExpanded(true);
-               } else {
-                   section.disclosureExpanded(null);
-               }
-               return section;
-           };
+         return cells;
+       } // Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
+       // /c*$/ is vulnerable to REDOS.
+       // invert: Remove suffix of non-c chars instead. Default falsey.

 
 
 
 

-           section.tags = function(val) {
-               if (!arguments.length) { return _tags; }
-               _tags = val;
-               return section;
-           };
+       function rtrim$1(str, c, invert) {
+         var l = str.length;

 
 

+         if (l === 0) {
+           return '';
+         } // Length of suffix matching the invert condition.

 
 

-           section.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-                   _entityIDs = val;
-                   _orderedKeys = [];
-               }
-               return section;
-           };

 
 

+         var suffLen = 0; // Step left until we fail to match the invert condition.

 
 

-           // pass an array of regular expressions to test against the tag key
-           section.readOnlyTags = function(val) {
-               if (!arguments.length) { return _readOnlyTags; }
-               _readOnlyTags = val;
-               return section;
-           };
+         while (suffLen < l) {
+           var currChar = str.charAt(l - suffLen - 1);

 
 

+           if (currChar === c && !invert) {
+             suffLen++;
+           } else if (currChar !== c && invert) {
+             suffLen++;
+           } else {
+             break;
+           }
+         }

 
 

-           return utilRebind(section, dispatch$1, 'on');
+         return str.substr(0, l - suffLen);

        }
 
        }
 

-       function uiDataEditor(context) {
-           var dataHeader = uiDataHeader();
-           var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context)
-               .expandedByDefault(true)
-               .readOnlyTags([/./]);
-           var _datum;
-
-
-           function dataEditor(selection) {
-
-               var header = selection.selectAll('.header')
-                   .data([0]);
-
-               var headerEnter = header.enter()
-                   .append('div')
-                   .attr('class', 'header fillL');
+       function findClosingBracket$1(str, b) {
+         if (str.indexOf(b[1]) === -1) {
+           return -1;
+         }

 
 

-               headerEnter
-                   .append('button')
-                   .attr('class', 'close')
-                   .on('click', function() {
-                       context.enter(modeBrowse(context));
-                   })
-                   .call(svgIcon('#iD-icon-close'));
+         var l = str.length;
+         var level = 0,
+             i = 0;

 
 

-               headerEnter
-                   .append('h3')
-                   .text(_t('map_data.title'));
+         for (; i < l; i++) {
+           if (str[i] === '\\') {
+             i++;
+           } else if (str[i] === b[0]) {
+             level++;
+           } else if (str[i] === b[1]) {
+             level--;

 
 

+             if (level < 0) {
+               return i;
+             }
+           }
+         }

 
 

-               var body = selection.selectAll('.body')
-                   .data([0]);
+         return -1;
+       }

 
 

-               body = body.enter()
-                   .append('div')
-                   .attr('class', 'body')
-                   .merge(body);
+       function checkSanitizeDeprecation$1(opt) {
+         if (opt && opt.sanitize && !opt.silent) {
+           console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
+         }
+       } // copied from https://stackoverflow.com/a/5450113/806777

 
 

-               var editor = body.selectAll('.data-editor')
-                   .data([0]);

 
 

-               // enter/update
-               editor.enter()
-                   .append('div')
-                   .attr('class', 'modal-section data-editor')
-                   .merge(editor)
-                   .call(dataHeader.datum(_datum));
+       function repeatString$1(pattern, count) {
+         if (count < 1) {
+           return '';
+         }

 
 

-               var rte = body.selectAll('.raw-tag-editor')
-                   .data([0]);
+         var result = '';

 
 

-               // enter/update
-               rte.enter()
-                   .append('div')
-                   .attr('class', 'raw-tag-editor data-editor')
-                   .merge(rte)
-                   .call(rawTagEditor
-                       .tags((_datum && _datum.properties) || {})
-                       .state('hover')
-                       .render
-                   )
-                   .selectAll('textarea.tag-text')
-                   .attr('readonly', true)
-                   .classed('readonly', true);
+         while (count > 1) {
+           if (count & 1) {
+             result += pattern;

            }
 
            }
 

+           count >>= 1;
+           pattern += pattern;
+         }

 
 

-           dataEditor.datum = function(val) {
-               if (!arguments.length) { return _datum; }
-               _datum = val;
-               return this;
-           };
+         return result + pattern;
+       }

 
 

+       var helpers = {
+         escape: escape$3,
+         unescape: unescape$2,
+         edit: edit$1,
+         cleanUrl: cleanUrl$1,
+         resolveUrl: resolveUrl$2,
+         noopTest: noopTest$1,
+         merge: merge$2,
+         splitCells: splitCells$1,
+         rtrim: rtrim$1,
+         findClosingBracket: findClosingBracket$1,
+         checkSanitizeDeprecation: checkSanitizeDeprecation$1,
+         repeatString: repeatString$1
+       };
+
+       var defaults$4 = defaults$5.exports.defaults;
+       var rtrim = helpers.rtrim,
+           splitCells = helpers.splitCells,
+           _escape = helpers.escape,
+           findClosingBracket = helpers.findClosingBracket;

 
 

-           return dataEditor;
-       }
+       function outputLink(cap, link, raw) {
+         var href = link.href;
+         var title = link.title ? _escape(link.title) : null;
+         var text = cap[1].replace(/\\([\[\]])/g, '$1');

 
 

-       function modeSelectData(context, selectedDatum) {
-           var mode = {
-               id: 'select-data',
-               button: 'browse'
+         if (cap[0].charAt(0) !== '!') {
+           return {
+             type: 'link',
+             raw: raw,
+             href: href,
+             title: title,
+             text: text

            };
            };

+         } else {
+           return {
+             type: 'image',
+             raw: raw,
+             href: href,
+             title: title,
+             text: _escape(text)
+           };
+         }
+       }

 
 

-           var keybinding = utilKeybinding('select-data');
-           var dataEditor = uiDataEditor(context);
-
-           var behaviors = [
-               behaviorBreathe(),
-               behaviorHover(context),
-               behaviorSelect(context),
-               behaviorLasso(context),
-               modeDragNode(context).behavior,
-               modeDragNote(context).behavior
-           ];
+       function indentCodeCompensation(raw, text) {
+         var matchIndentToCode = raw.match(/^(\s+)(?:```)/);

 
 

+         if (matchIndentToCode === null) {
+           return text;
+         }

 
 

-           // class the data as selected, or return to browse mode if the data is gone
-           function selectData(drawn) {
-               var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
+         var indentToCode = matchIndentToCode[1];
+         return text.split('\n').map(function (node) {
+           var matchIndentInNode = node.match(/^\s+/);

 
 

-               if (selection.empty()) {
-                   // Return to browse mode if selected DOM elements have
-                   // disappeared because the user moved them out of view..
-                   var source = event && event.type === 'zoom' && event.sourceEvent;
-                   if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-                       context.enter(modeBrowse(context));
-                   }
-               } else {
-                   selection.classed('selected', true);
-               }
+           if (matchIndentInNode === null) {
+             return node;

            }
 
            }
 

+           var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
+               indentInNode = _matchIndentInNode[0];

 
 

-           function esc() {
-               if (context.container().select('.combobox').size()) { return; }
-               context.enter(modeBrowse(context));
+           if (indentInNode.length >= indentToCode.length) {
+             return node.slice(indentToCode.length);

            }
 
            }
 

+           return node;
+         }).join('\n');
+       }
+       /**
+        * Tokenizer
+        */

 
 

-           mode.zoomToSelected = function() {
-               var extent = geoExtent(d3_geoBounds(selectedDatum));
-               context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
-           };
-
-
-           mode.enter = function() {
-               behaviors.forEach(context.install);

 
 

-               keybinding
-                   .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-                   .on('⎋', esc, true);
+       var Tokenizer_1 = /*#__PURE__*/function () {
+         function Tokenizer(options) {
+           _classCallCheck$1(this, Tokenizer);

 
 

-               select(document)
-                   .call(keybinding);
+           this.options = options || defaults$4;
+         }

 
 

-               selectData();
+         _createClass$1(Tokenizer, [{
+           key: "space",
+           value: function space(src) {
+             var cap = this.rules.block.newline.exec(src);

 
 

-               var sidebar = context.ui().sidebar;
-               sidebar.show(dataEditor.datum(selectedDatum));
+             if (cap) {
+               if (cap[0].length > 1) {
+                 return {
+                   type: 'space',
+                   raw: cap[0]
+                 };
+               }

 
 

-               // expand the sidebar, avoid obscuring the data if needed
-               var extent = geoExtent(d3_geoBounds(selectedDatum));
-               sidebar.expand(sidebar.intersects(extent));
+               return {
+                 raw: '\n'
+               };
+             }
+           }
+         }, {
+           key: "code",
+           value: function code(src) {
+             var cap = this.rules.block.code.exec(src);

 
 

-               context.map()
-                   .on('drawn.select-data', selectData);
-           };
+             if (cap) {
+               var text = cap[0].replace(/^ {1,4}/gm, '');
+               return {
+                 type: 'code',
+                 raw: cap[0],
+                 codeBlockStyle: 'indented',
+                 text: !this.options.pedantic ? rtrim(text, '\n') : text
+               };
+             }
+           }
+         }, {
+           key: "fences",
+           value: function fences(src) {
+             var cap = this.rules.block.fences.exec(src);

 
 

+             if (cap) {
+               var raw = cap[0];
+               var text = indentCodeCompensation(raw, cap[3] || '');
+               return {
+                 type: 'code',
+                 raw: raw,
+                 lang: cap[2] ? cap[2].trim() : cap[2],
+                 text: text
+               };
+             }
+           }
+         }, {
+           key: "heading",
+           value: function heading(src) {
+             var cap = this.rules.block.heading.exec(src);

 
 

-           mode.exit = function() {
-               behaviors.forEach(context.uninstall);
+             if (cap) {
+               var text = cap[2].trim(); // remove trailing #s

 
 

-               select(document)
-                   .call(keybinding.unbind);
+               if (/#$/.test(text)) {
+                 var trimmed = rtrim(text, '#');

 
 

-               context.surface()
-                   .selectAll('.layer-mapdata .selected')
-                   .classed('selected hover', false);
+                 if (this.options.pedantic) {
+                   text = trimmed.trim();
+                 } else if (!trimmed || / $/.test(trimmed)) {
+                   // CommonMark requires space before trailing #s
+                   text = trimmed.trim();
+                 }
+               }

 
 

-               context.map()
-                   .on('drawn.select-data', null);
+               return {
+                 type: 'heading',
+                 raw: cap[0],
+                 depth: cap[1].length,
+                 text: text
+               };
+             }
+           }
+         }, {
+           key: "nptable",
+           value: function nptable(src) {
+             var cap = this.rules.block.nptable.exec(src);
+
+             if (cap) {
+               var item = {
+                 type: 'table',
+                 header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
+                 align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+                 cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : [],
+                 raw: cap[0]
+               };

 
 

-               context.ui().sidebar
-                   .hide();
-           };
+               if (item.header.length === item.align.length) {
+                 var l = item.align.length;
+                 var i;
+
+                 for (i = 0; i < l; i++) {
+                   if (/^ *-+: *$/.test(item.align[i])) {
+                     item.align[i] = 'right';
+                   } else if (/^ *:-+: *$/.test(item.align[i])) {
+                     item.align[i] = 'center';
+                   } else if (/^ *:-+ *$/.test(item.align[i])) {
+                     item.align[i] = 'left';
+                   } else {
+                     item.align[i] = null;
+                   }
+                 }

 
 

+                 l = item.cells.length;

 
 

-           return mode;
-       }
+                 for (i = 0; i < l; i++) {
+                   item.cells[i] = splitCells(item.cells[i], item.header.length);
+                 }

 
 

-       function uiImproveOsmComments() {
-         var _qaItem;
+                 return item;
+               }
+             }
+           }
+         }, {
+           key: "hr",
+           value: function hr(src) {
+             var cap = this.rules.block.hr.exec(src);

 
 

-         function issueComments(selection) {
-           // make the div immediately so it appears above the buttons
-           var comments = selection.selectAll('.comments-container')
-             .data([0]);
-
-           comments = comments.enter()
-             .append('div')
-               .attr('class', 'comments-container')
-             .merge(comments);
-
-           // must retrieve comments from API before they can be displayed
-           services.improveOSM.getComments(_qaItem)
-             .then(function (d) {
-               if (!d.comments) { return; } // nothing to do here
-
-               var commentEnter = comments.selectAll('.comment')
-                 .data(d.comments)
-                 .enter()
-                 .append('div')
-                   .attr('class', 'comment');
-
-               commentEnter
-                 .append('div')
-                   .attr('class', 'comment-avatar')
-                   .call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
-
-               var mainEnter = commentEnter
-                 .append('div')
-                 .attr('class', 'comment-main');
-
-               var metadataEnter = mainEnter
-                 .append('div')
-                   .attr('class', 'comment-metadata');
-
-               metadataEnter
-                 .append('div')
-                   .attr('class', 'comment-author')
-                   .each(function(d) {
-                     var osm = services.osm;
-                     var selection = select(this);
-                     if (osm && d.username) {
-                       selection = selection
-                         .append('a')
-                         .attr('class', 'comment-author-link')
-                         .attr('href', osm.userURL(d.username))
-                         .attr('tabindex', -1)
-                         .attr('target', '_blank');
-                     }
-                     selection
-                       .text(function (d) { return d.username; });
-                   });
+             if (cap) {
+               return {
+                 type: 'hr',
+                 raw: cap[0]
+               };
+             }
+           }
+         }, {
+           key: "blockquote",
+           value: function blockquote(src) {
+             var cap = this.rules.block.blockquote.exec(src);

 
 

-               metadataEnter
-                 .append('div')
-                   .attr('class', 'comment-date')
-                   .text(function (d) { return _t('note.status.commented', { when: localeDateString(d.timestamp) }); });
+             if (cap) {
+               var text = cap[0].replace(/^ *> ?/gm, '');
+               return {
+                 type: 'blockquote',
+                 raw: cap[0],
+                 text: text
+               };
+             }
+           }
+         }, {
+           key: "list",
+           value: function list(src) {
+             var cap = this.rules.block.list.exec(src);
+
+             if (cap) {
+               var raw = cap[0];
+               var bull = cap[2];
+               var isordered = bull.length > 1;
+               var list = {
+                 type: 'list',
+                 raw: raw,
+                 ordered: isordered,
+                 start: isordered ? +bull.slice(0, -1) : '',
+                 loose: false,
+                 items: []
+               }; // Get each top-level item.
+
+               var itemMatch = cap[0].match(this.rules.block.item);
+               var next = false,
+                   item,
+                   space,
+                   bcurr,
+                   bnext,
+                   addBack,
+                   loose,
+                   istask,
+                   ischecked,
+                   endMatch;
+               var l = itemMatch.length;
+               bcurr = this.rules.block.listItemStart.exec(itemMatch[0]);
+
+               for (var i = 0; i < l; i++) {
+                 item = itemMatch[i];
+                 raw = item;
+
+                 if (!this.options.pedantic) {
+                   // Determine if current item contains the end of the list
+                   endMatch = item.match(new RegExp('\\n\\s*\\n {0,' + (bcurr[0].length - 1) + '}\\S'));
+
+                   if (endMatch) {
+                     addBack = item.length - endMatch.index + itemMatch.slice(i + 1).join('\n').length;
+                     list.raw = list.raw.substring(0, list.raw.length - addBack);
+                     item = item.substring(0, endMatch.index);
+                     raw = item;
+                     l = i + 1;
+                   }
+                 } // Determine whether the next list item belongs here.
+                 // Backpedal if it does not belong in this list.
+
+
+                 if (i !== l - 1) {
+                   bnext = this.rules.block.listItemStart.exec(itemMatch[i + 1]);
+
+                   if (!this.options.pedantic ? bnext[1].length >= bcurr[0].length || bnext[1].length > 3 : bnext[1].length > bcurr[1].length) {
+                     // nested list or continuation
+                     itemMatch.splice(i, 2, itemMatch[i] + (!this.options.pedantic && bnext[1].length < bcurr[0].length && !itemMatch[i].match(/\n$/) ? '' : '\n') + itemMatch[i + 1]);
+                     i--;
+                     l--;
+                     continue;
+                   } else if ( // different bullet style
+                   !this.options.pedantic || this.options.smartLists ? bnext[2][bnext[2].length - 1] !== bull[bull.length - 1] : isordered === (bnext[2].length === 1)) {
+                     addBack = itemMatch.slice(i + 1).join('\n').length;
+                     list.raw = list.raw.substring(0, list.raw.length - addBack);
+                     i = l - 1;
+                   }
+
+                   bcurr = bnext;
+                 } // Remove the list item's bullet
+                 // so it is seen as the next token.
+
+
+                 space = item.length;
+                 item = item.replace(/^ *([*+-]|\d+[.)]) ?/, ''); // Outdent whatever the
+                 // list item contains. Hacky.
+
+                 if (~item.indexOf('\n ')) {
+                   space -= item.length;
+                   item = !this.options.pedantic ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '') : item.replace(/^ {1,4}/gm, '');
+                 } // trim item newlines at end
+
+
+                 item = rtrim(item, '\n');
+
+                 if (i !== l - 1) {
+                   raw = raw + '\n';
+                 } // Determine whether item is loose or not.
+                 // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
+                 // for discount behavior.
+
+
+                 loose = next || /\n\n(?!\s*$)/.test(raw);
+
+                 if (i !== l - 1) {
+                   next = raw.slice(-2) === '\n\n';
+                   if (!loose) loose = next;
+                 }

 
 

-               mainEnter
-                 .append('div')
-                   .attr('class', 'comment-text')
-                 .append('p')
-                   .text(function (d) { return d.text; });
-           })
-           .catch(function (err) {
-             console.log(err); // eslint-disable-line no-console
-           });
-         }
+                 if (loose) {
+                   list.loose = true;
+                 } // Check for task list items

 
 

-         function localeDateString(s) {
-           if (!s) { return null; }
-           var options = { day: 'numeric', month: 'short', year: 'numeric' };
-           var d = new Date(s * 1000); // timestamp is served in seconds, date takes ms
-           if (isNaN(d.getTime())) { return null; }
-           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-         }

 
 

-         issueComments.issue = function(val) {
-           if (!arguments.length) { return _qaItem; }
-           _qaItem = val;
-           return issueComments;
-         };
+                 if (this.options.gfm) {
+                   istask = /^\[[ xX]\] /.test(item);
+                   ischecked = undefined;

 
 

-         return issueComments;
-       }
+                   if (istask) {
+                     ischecked = item[1] !== ' ';
+                     item = item.replace(/^\[[ xX]\] +/, '');
+                   }
+                 }

 
 

-       function uiImproveOsmDetails(context) {
-         var _qaItem;
+                 list.items.push({
+                   type: 'list_item',
+                   raw: raw,
+                   task: istask,
+                   checked: ischecked,
+                   loose: loose,
+                   text: item
+                 });
+               }

 
 

+               return list;
+             }
+           }
+         }, {
+           key: "html",
+           value: function html(src) {
+             var cap = this.rules.block.html.exec(src);

 
 

-         function issueDetail(d) {
-           if (d.desc) { return d.desc; }
-           var issueKey = d.issueKey;
-           d.replacements = d.replacements || {};
-           d.replacements.default = _t('inspector.unknown');  // special key `default` works as a fallback string
-           return _t(("QA.improveOSM.error_types." + issueKey + ".description"), d.replacements);
-         }
+             if (cap) {
+               return {
+                 type: this.options.sanitize ? 'paragraph' : 'html',
+                 raw: cap[0],
+                 pre: !this.options.sanitizer && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
+                 text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
+               };
+             }
+           }
+         }, {
+           key: "def",
+           value: function def(src) {
+             var cap = this.rules.block.def.exec(src);

 
 

+             if (cap) {
+               if (cap[3]) cap[3] = cap[3].substring(1, cap[3].length - 1);
+               var tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
+               return {
+                 type: 'def',
+                 tag: tag,
+                 raw: cap[0],
+                 href: cap[2],
+                 title: cap[3]
+               };
+             }
+           }
+         }, {
+           key: "table",
+           value: function table(src) {
+             var cap = this.rules.block.table.exec(src);
+
+             if (cap) {
+               var item = {
+                 type: 'table',
+                 header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
+                 align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+                 cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
+               };

 
 

-         function improveOsmDetails(selection) {
-           var details = selection.selectAll('.error-details')
-             .data(
-               (_qaItem ? [_qaItem] : []),
-               function (d) { return ((d.id) + "-" + (d.status || 0)); }
-             );
+               if (item.header.length === item.align.length) {
+                 item.raw = cap[0];
+                 var l = item.align.length;
+                 var i;
+
+                 for (i = 0; i < l; i++) {
+                   if (/^ *-+: *$/.test(item.align[i])) {
+                     item.align[i] = 'right';
+                   } else if (/^ *:-+: *$/.test(item.align[i])) {
+                     item.align[i] = 'center';
+                   } else if (/^ *:-+ *$/.test(item.align[i])) {
+                     item.align[i] = 'left';
+                   } else {
+                     item.align[i] = null;
+                   }
+                 }

 
 

-           details.exit()
-             .remove();
+                 l = item.cells.length;

 
 

-           var detailsEnter = details.enter()
-             .append('div')
-               .attr('class', 'error-details qa-details-container');
+                 for (i = 0; i < l; i++) {
+                   item.cells[i] = splitCells(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
+                 }

 
 

+                 return item;
+               }
+             }
+           }
+         }, {
+           key: "lheading",
+           value: function lheading(src) {
+             var cap = this.rules.block.lheading.exec(src);

 
 

-           // description
-           var descriptionEnter = detailsEnter
-             .append('div')
-               .attr('class', 'qa-details-subsection');
+             if (cap) {
+               return {
+                 type: 'heading',
+                 raw: cap[0],
+                 depth: cap[2].charAt(0) === '=' ? 1 : 2,
+                 text: cap[1]
+               };
+             }
+           }
+         }, {
+           key: "paragraph",
+           value: function paragraph(src) {
+             var cap = this.rules.block.paragraph.exec(src);

 
 

-           descriptionEnter
-             .append('h4')
-               .text(function () { return _t('QA.keepRight.detail_description'); });
+             if (cap) {
+               return {
+                 type: 'paragraph',
+                 raw: cap[0],
+                 text: cap[1].charAt(cap[1].length - 1) === '\n' ? cap[1].slice(0, -1) : cap[1]
+               };
+             }
+           }
+         }, {
+           key: "text",
+           value: function text(src) {
+             var cap = this.rules.block.text.exec(src);

 
 

-           descriptionEnter
-             .append('div')
-               .attr('class', 'qa-details-description-text')
-               .html(issueDetail);
+             if (cap) {
+               return {
+                 type: 'text',
+                 raw: cap[0],
+                 text: cap[0]
+               };
+             }
+           }
+         }, {
+           key: "escape",
+           value: function escape(src) {
+             var cap = this.rules.inline.escape.exec(src);

 
 

-           // If there are entity links in the error message..
-           var relatedEntities = [];
-           descriptionEnter.selectAll('.error_entity_link, .error_object_link')
-             .each(function() {
-               var link = select(this);
-               var isObjectLink = link.classed('error_object_link');
-               var entityID = isObjectLink ?
-                 (utilEntityRoot(_qaItem.objectType) + _qaItem.objectId)
-                 : this.textContent;
-               var entity = context.hasEntity(entityID);
+             if (cap) {
+               return {
+                 type: 'escape',
+                 raw: cap[0],
+                 text: _escape(cap[1])
+               };
+             }
+           }
+         }, {
+           key: "tag",
+           value: function tag(src, inLink, inRawBlock) {
+             var cap = this.rules.inline.tag.exec(src);

 
 

-               relatedEntities.push(entityID);
+             if (cap) {
+               if (!inLink && /^<a /i.test(cap[0])) {
+                 inLink = true;
+               } else if (inLink && /^<\/a>/i.test(cap[0])) {
+                 inLink = false;
+               }

 
 

-               // Add click handler
-               link
-                 .on('mouseenter', function () {
-                   utilHighlightEntities([entityID], true, context);
-                 })
-                 .on('mouseleave', function () {
-                   utilHighlightEntities([entityID], false, context);
-                 })
-                 .on('click', function () {
-                   event.preventDefault();
+               if (!inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+                 inRawBlock = true;
+               } else if (inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+                 inRawBlock = false;
+               }

 
 

-                   utilHighlightEntities([entityID], false, context);
+               return {
+                 type: this.options.sanitize ? 'text' : 'html',
+                 raw: cap[0],
+                 inLink: inLink,
+                 inRawBlock: inRawBlock,
+                 text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
+               };
+             }
+           }
+         }, {
+           key: "link",
+           value: function link(src) {
+             var cap = this.rules.inline.link.exec(src);

 
 

-                   var osmlayer = context.layers().layer('osm');
-                   if (!osmlayer.enabled()) {
-                     osmlayer.enabled(true);
-                   }
+             if (cap) {
+               var trimmedUrl = cap[2].trim();

 
 

-                   context.map().centerZoom(_qaItem.loc, 20);
+               if (!this.options.pedantic && /^</.test(trimmedUrl)) {
+                 // commonmark requires matching angle brackets
+                 if (!/>$/.test(trimmedUrl)) {
+                   return;
+                 } // ending angle bracket cannot be escaped

 
 

-                   if (entity) {
-                     context.enter(modeSelect(context, [entityID]));
-                   } else {
-                     context.loadEntity(entityID, function () {
-                       context.enter(modeSelect(context, [entityID]));
-                     });
-                   }
-                 });

 
 

-               // Replace with friendly name if possible
-               // (The entity may not yet be loaded into the graph)
-               if (entity) {
-                 var name = utilDisplayName(entity);  // try to use common name
+                 var rtrimSlash = rtrim(trimmedUrl.slice(0, -1), '\\');

 
 

-                 if (!name && !isObjectLink) {
-                   var preset = _mainPresetIndex.match(entity, context.graph());
-                   name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
+                 if ((trimmedUrl.length - rtrimSlash.length) % 2 === 0) {
+                   return;

                  }
                  }

-
-                 if (name) {
-                   this.innerText = name;
+               } else {
+                 // find closing parenthesis
+                 var lastParenIndex = findClosingBracket(cap[2], '()');
+
+                 if (lastParenIndex > -1) {
+                   var start = cap[0].indexOf('!') === 0 ? 5 : 4;
+                   var linkLen = start + cap[1].length + lastParenIndex;
+                   cap[2] = cap[2].substring(0, lastParenIndex);
+                   cap[0] = cap[0].substring(0, linkLen).trim();
+                   cap[3] = '';

                  }
                }
                  }
                }

-             });
-
-           // Don't hide entities related to this error - #5880
-           context.features().forceVisible(relatedEntities);
-           context.map().pan([0,0]);  // trigger a redraw
-         }
-
-         improveOsmDetails.issue = function(val) {
-           if (!arguments.length) { return _qaItem; }
-           _qaItem = val;
-           return improveOsmDetails;
-         };
-
-         return improveOsmDetails;
-       }

 
 

-       function uiImproveOsmHeader() {
-         var _qaItem;
+               var href = cap[2];
+               var title = '';

 
 

+               if (this.options.pedantic) {
+                 // split pedantic href and title
+                 var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);

 
 

-         function issueTitle(d) {
-           var issueKey = d.issueKey;
-           d.replacements = d.replacements || {};
-           d.replacements.default = _t('inspector.unknown');  // special key `default` works as a fallback string
-           return _t(("QA.improveOSM.error_types." + issueKey + ".title"), d.replacements);
-         }
-
+                 if (link) {
+                   href = link[1];
+                   title = link[3];
+                 }
+               } else {
+                 title = cap[3] ? cap[3].slice(1, -1) : '';
+               }

 
 

-         function improveOsmHeader(selection) {
-           var header = selection.selectAll('.qa-header')
-             .data(
-               (_qaItem ? [_qaItem] : []),
-               function (d) { return ((d.id) + "-" + (d.status || 0)); }
-             );
+               href = href.trim();

 
 

-           header.exit()
-             .remove();
-
-           var headerEnter = header.enter()
-             .append('div')
-               .attr('class', 'qa-header');
-
-           var svgEnter = headerEnter
-             .append('div')
-               .attr('class', 'qa-header-icon')
-               .classed('new', function (d) { return d.id < 0; })
-             .append('svg')
-               .attr('width', '20px')
-               .attr('height', '30px')
-               .attr('viewbox', '0 0 20 30')
-               .attr('class', function (d) { return ("preset-icon-28 qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-           svgEnter
-             .append('polygon')
-               .attr('fill', 'currentColor')
-               .attr('class', 'qaItem-fill')
-               .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-
-           svgEnter
-             .append('use')
-               .attr('class', 'icon-annotation')
-               .attr('width', '13px')
-               .attr('height', '13px')
-               .attr('transform', 'translate(3.5, 5)')
-               .attr('xlink:href', function (d) {
-                 var picon = d.icon;
-                 if (!picon) {
-                   return '';
+               if (/^</.test(href)) {
+                 if (this.options.pedantic && !/>$/.test(trimmedUrl)) {
+                   // pedantic allows starting angle bracket without ending angle bracket
+                   href = href.slice(1);

                  } else {
                  } else {

-                   var isMaki = /^maki-/.test(picon);
-                   return ("#" + picon + (isMaki ? '-11' : ''));
+                   href = href.slice(1, -1);

                  }
                  }

-               });
-
-           headerEnter
-             .append('div')
-               .attr('class', 'qa-header-label')
-               .text(issueTitle);
-         }
-
-         improveOsmHeader.issue = function(val) {
-           if (!arguments.length) { return _qaItem; }
-           _qaItem = val;
-           return improveOsmHeader;
-         };
-
-         return improveOsmHeader;
-       }
-
-       function uiImproveOsmEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var qaDetails = uiImproveOsmDetails(context);
-         var qaComments = uiImproveOsmComments();
-         var qaHeader = uiImproveOsmHeader();
-
-         var _qaItem;
-
-         function improveOsmEditor(selection) {
-
-           var headerEnter = selection.selectAll('.header')
-             .data([0])
-             .enter()
-             .append('div')
-               .attr('class', 'header fillL');
+               }

 
 

-           headerEnter
-             .append('button')
-               .attr('class', 'close')
-               .on('click', function () { return context.enter(modeBrowse(context)); })
-               .call(svgIcon('#iD-icon-close'));
+               return outputLink(cap, {
+                 href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
+                 title: title ? title.replace(this.rules.inline._escapes, '$1') : title
+               }, cap[0]);
+             }
+           }
+         }, {
+           key: "reflink",
+           value: function reflink(src, links) {
+             var cap;

 
 

-           headerEnter
-             .append('h3')
-               .text(_t('QA.improveOSM.title'));
+             if ((cap = this.rules.inline.reflink.exec(src)) || (cap = this.rules.inline.nolink.exec(src))) {
+               var link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
+               link = links[link.toLowerCase()];

 
 

-           var body = selection.selectAll('.body')
-             .data([0]);
+               if (!link || !link.href) {
+                 var text = cap[0].charAt(0);
+                 return {
+                   type: 'text',
+                   raw: text,
+                   text: text
+                 };
+               }

 
 

-           body = body.enter()
-             .append('div')
-               .attr('class', 'body')
-             .merge(body);
+               return outputLink(cap, link, cap[0]);
+             }
+           }
+         }, {
+           key: "emStrong",
+           value: function emStrong(src, maskedSrc) {
+             var prevChar = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '';
+             var match = this.rules.inline.emStrong.lDelim.exec(src);
+             if (!match) return; // _ can't be between two alphanumerics. \p{L}\p{N} includes non-english alphabet/numbers as well
+
+             if (match[3] && prevChar.match(/(?:[0-9A-Za-z\xAA\xB2\xB3\xB5\xB9\xBA\xBC-\xBE\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0560-\u0588\u05D0-\u05EA\u05EF-\u05F2\u0620-\u064A\u0660-\u0669\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07C0-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u0860-\u086A\u08A0-\u08B4\u08B6-\u08C7\u0904-\u0939\u093D\u0950\u0958-\u0961\u0966-\u096F\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09E6-\u09F1\u09F4-\u09F9\u09FC\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A66-\u0A6F\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0AE6-\u0AEF\u0AF9\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B66-\u0B6F\u0B71-\u0B77\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0BE6-\u0BF2\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58-\u0C5A\u0C60\u0C61\u0C66-\u0C6F\u0C78-\u0C7E\u0C80\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CE6-\u0CEF\u0CF1\u0CF2\u0D04-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D54-\u0D56\u0D58-\u0D61\u0D66-\u0D78\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DE6-\u0DEF\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E86-\u0E8A\u0E8C-\u0EA3\u0EA5\u0EA7-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F20-\u0F33\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F-\u1049\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u1090-\u1099\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1369-\u137C\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u17E0-\u17E9\u17F0-\u17F9\u1810-\u1819\u1820-\u1878\u1880-\u1884\u1887-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19DA\u1A00-\u1A16\u1A20-\u1A54\u1A80-\u1A89\u1A90-\u1A99\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B50-\u1B59\u1B83-\u1BA0\u1BAE-\u1BE5\u1C00-\u1C23\u1C40-\u1C49\u1C4D-\u1C7D\u1C80-\u1C88\u1C90-\u1CBA\u1CBD-\u1CBF\u1CE9-\u1CEC\u1CEE-\u1CF3\u1CF5\u1CF6\u1CFA\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2070\u2071\u2074-\u2079\u207F-\u2089\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2150-\u2189\u2460-\u249B\u24EA-\u24FF\u2776-\u2793\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2CFD\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312F\u3131-\u318E\u3192-\u3195\u31A0-\u31BF\u31F0-\u31FF\u3220-\u3229\u3248-\u324F\u3251-\u325F\u3280-\u3289\u32B1-\u32BF\u3400-\u4DBF\u4E00-\u9FFC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA7BF\uA7C2-\uA7CA\uA7F5-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA830-\uA835\uA840-\uA873\uA882-\uA8B3\uA8D0-\uA8D9\uA8F2-\uA8F7\uA8FB\uA8FD\uA8FE\uA900-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF-\uA9D9\uA9E0-\uA9E4\uA9E6-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA50-\uAA59\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB69\uAB70-\uABE2\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD07-\uDD33\uDD40-\uDD78\uDD8A\uDD8B\uDE80-\uDE9C\uDEA0-\uDED0\uDEE1-\uDEFB\uDF00-\uDF23\uDF2D-\uDF4A\uDF50-\uDF75\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDCB0-\uDCD3\uDCD8-\uDCFB\uDD00-\uDD27\uDD30-\uDD63\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC58-\uDC76\uDC79-\uDC9E\uDCA7-\uDCAF\uDCE0-\uDCF2\uDCF4\uDCF5\uDCFB-\uDD1B\uDD20-\uDD39\uDD80-\uDDB7\uDDBC-\uDDCF\uDDD2-\uDE00\uDE10-\uDE13\uDE15-\uDE17\uDE19-\uDE35\uDE40-\uDE48\uDE60-\uDE7E\uDE80-\uDE9F\uDEC0-\uDEC7\uDEC9-\uDEE4\uDEEB-\uDEEF\uDF00-\uDF35\uDF40-\uDF55\uDF58-\uDF72\uDF78-\uDF91\uDFA9-\uDFAF]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2\uDCFA-\uDD23\uDD30-\uDD39\uDE60-\uDE7E\uDE80-\uDEA9\uDEB0\uDEB1\uDF00-\uDF27\uDF30-\uDF45\uDF51-\uDF54\uDFB0-\uDFCB\uDFE0-\uDFF6]|\uD804[\uDC03-\uDC37\uDC52-\uDC6F\uDC83-\uDCAF\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD03-\uDD26\uDD36-\uDD3F\uDD44\uDD47\uDD50-\uDD72\uDD76\uDD83-\uDDB2\uDDC1-\uDDC4\uDDD0-\uDDDA\uDDDC\uDDE1-\uDDF4\uDE00-\uDE11\uDE13-\uDE2B\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEDE\uDEF0-\uDEF9\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3D\uDF50\uDF5D-\uDF61]|\uD805[\uDC00-\uDC34\uDC47-\uDC4A\uDC50-\uDC59\uDC5F-\uDC61\uDC80-\uDCAF\uDCC4\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDAE\uDDD8-\uDDDB\uDE00-\uDE2F\uDE44\uDE50-\uDE59\uDE80-\uDEAA\uDEB8\uDEC0-\uDEC9\uDF00-\uDF1A\uDF30-\uDF3B]|\uD806[\uDC00-\uDC2B\uDCA0-\uDCF2\uDCFF-\uDD06\uDD09\uDD0C-\uDD13\uDD15\uDD16\uDD18-\uDD2F\uDD3F\uDD41\uDD50-\uDD59\uDDA0-\uDDA7\uDDAA-\uDDD0\uDDE1\uDDE3\uDE00\uDE0B-\uDE32\uDE3A\uDE50\uDE5C-\uDE89\uDE9D\uDEC0-\uDEF8]|\uD807[\uDC00-\uDC08\uDC0A-\uDC2E\uDC40\uDC50-\uDC6C\uDC72-\uDC8F\uDD00-\uDD06\uDD08\uDD09\uDD0B-\uDD30\uDD46\uDD50-\uDD59\uDD60-\uDD65\uDD67\uDD68\uDD6A-\uDD89\uDD98\uDDA0-\uDDA9\uDEE0-\uDEF2\uDFB0\uDFC0-\uDFD4]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|[\uD80C\uD81C-\uD820\uD822\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872\uD874-\uD879\uD880-\uD883][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDED0-\uDEED\uDF00-\uDF2F\uDF40-\uDF43\uDF50-\uDF59\uDF5B-\uDF61\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDE40-\uDE96\uDF00-\uDF4A\uDF50\uDF93-\uDF9F\uDFE0\uDFE1\uDFE3]|\uD821[\uDC00-\uDFF7]|\uD823[\uDC00-\uDCD5\uDD00-\uDD08]|\uD82C[\uDC00-\uDD1E\uDD50-\uDD52\uDD64-\uDD67\uDD70-\uDEFB]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99]|\uD834[\uDEE0-\uDEF3\uDF60-\uDF78]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD838[\uDD00-\uDD2C\uDD37-\uDD3D\uDD40-\uDD49\uDD4E\uDEC0-\uDEEB\uDEF0-\uDEF9]|\uD83A[\uDC00-\uDCC4\uDCC7-\uDCCF\uDD00-\uDD43\uDD4B\uDD50-\uDD59]|\uD83B[\uDC71-\uDCAB\uDCAD-\uDCAF\uDCB1-\uDCB4\uDD01-\uDD2D\uDD2F-\uDD3D\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD83C[\uDD00-\uDD0C]|\uD83E[\uDFF0-\uDFF9]|\uD869[\uDC00-\uDEDD\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF34\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1\uDEB0-\uDFFF]|\uD87A[\uDC00-\uDFE0]|\uD87E[\uDC00-\uDE1D]|\uD884[\uDC00-\uDF4A])/)) return;
+             var nextChar = match[1] || match[2] || '';
+
+             if (!nextChar || nextChar && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar))) {
+               var lLength = match[0].length - 1;
+               var rDelim,
+                   rLength,
+                   delimTotal = lLength,
+                   midDelimTotal = 0;
+               var endReg = match[0][0] === '*' ? this.rules.inline.emStrong.rDelimAst : this.rules.inline.emStrong.rDelimUnd;
+               endReg.lastIndex = 0; // Clip maskedSrc to same section of string as src (move to lexer?)
+
+               maskedSrc = maskedSrc.slice(-1 * src.length + lLength);
+
+               while ((match = endReg.exec(maskedSrc)) != null) {
+                 rDelim = match[1] || match[2] || match[3] || match[4] || match[5] || match[6];
+                 if (!rDelim) continue; // skip single * in __abc*abc__
+
+                 rLength = rDelim.length;
+
+                 if (match[3] || match[4]) {
+                   // found another Left Delim
+                   delimTotal += rLength;
+                   continue;
+                 } else if (match[5] || match[6]) {
+                   // either Left or Right Delim
+                   if (lLength % 3 && !((lLength + rLength) % 3)) {
+                     midDelimTotal += rLength;
+                     continue; // CommonMark Emphasis Rules 9-10
+                   }
+                 }

 
 

-           var editor = body.selectAll('.qa-editor')
-             .data([0]);
+                 delimTotal -= rLength;
+                 if (delimTotal > 0) continue; // Haven't found enough closing delimiters
+                 // Remove extra characters. *a*** -> *a*

 
 

-           editor.enter()
-             .append('div')
-               .attr('class', 'modal-section qa-editor')
-             .merge(editor)
-               .call(qaHeader.issue(_qaItem))
-               .call(qaDetails.issue(_qaItem))
-               .call(qaComments.issue(_qaItem))
-               .call(improveOsmSaveSection);
-         }
+                 rLength = Math.min(rLength, rLength + delimTotal + midDelimTotal); // Create `em` if smallest delimiter has odd char count. *a***

 
 

-         function improveOsmSaveSection(selection) {
-           var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-           var isShown = (_qaItem && (isSelected || _qaItem.newComment || _qaItem.comment));
-           var saveSection = selection.selectAll('.qa-save')
-             .data(
-               (isShown ? [_qaItem] : []),
-               function (d) { return ((d.id) + "-" + (d.status || 0)); }
-             );
+                 if (Math.min(lLength, rLength) % 2) {
+                   return {
+                     type: 'em',
+                     raw: src.slice(0, lLength + match.index + rLength + 1),
+                     text: src.slice(1, lLength + match.index + rLength)
+                   };
+                 } // Create 'strong' if smallest delimiter has even char count. **a***

 
 

-           // exit
-           saveSection.exit()
-             .remove();

 
 

-           // enter
-           var saveSectionEnter = saveSection.enter()
-             .append('div')
-               .attr('class', 'qa-save save-section cf');
-
-           saveSectionEnter
-             .append('h4')
-               .attr('class', '.qa-save-header')
-               .text(_t('note.newComment'));
-
-           saveSectionEnter
-             .append('textarea')
-               .attr('class', 'new-comment-input')
-               .attr('placeholder', _t('QA.keepRight.comment_placeholder'))
-               .attr('maxlength', 1000)
-               .property('value', function (d) { return d.newComment; })
-               .call(utilNoAuto)
-               .on('input', changeInput)
-               .on('blur', changeInput);
+                 return {
+                   type: 'strong',
+                   raw: src.slice(0, lLength + match.index + rLength + 1),
+                   text: src.slice(2, lLength + match.index + rLength - 1)
+                 };
+               }
+             }
+           }
+         }, {
+           key: "codespan",
+           value: function codespan(src) {
+             var cap = this.rules.inline.code.exec(src);

 
 

-           // update
-           saveSection = saveSectionEnter
-             .merge(saveSection)
-               .call(qaSaveButtons);
+             if (cap) {
+               var text = cap[2].replace(/\n/g, ' ');
+               var hasNonSpaceChars = /[^ ]/.test(text);
+               var hasSpaceCharsOnBothEnds = /^ /.test(text) && / $/.test(text);

 
 

-           function changeInput() {
-             var input = select(this);
-             var val = input.property('value').trim();
+               if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
+                 text = text.substring(1, text.length - 1);
+               }

 
 

-             if (val === '') {
-               val = undefined;
+               text = _escape(text, true);
+               return {
+                 type: 'codespan',
+                 raw: cap[0],
+                 text: text
+               };

              }
              }

+           }
+         }, {
+           key: "br",
+           value: function br(src) {
+             var cap = this.rules.inline.br.exec(src);

 
 

-             // store the unsaved comment with the issue itself
-             _qaItem = _qaItem.update({ newComment: val });
-
-             var qaService = services.improveOSM;
-             if (qaService) {
-               qaService.replaceItem(_qaItem);
+             if (cap) {
+               return {
+                 type: 'br',
+                 raw: cap[0]
+               };

              }
              }

+           }
+         }, {
+           key: "del",
+           value: function del(src) {
+             var cap = this.rules.inline.del.exec(src);

 
 

-             saveSection
-               .call(qaSaveButtons);
+             if (cap) {
+               return {
+                 type: 'del',
+                 raw: cap[0],
+                 text: cap[2]
+               };
+             }

            }
            }

-         }
+         }, {
+           key: "autolink",
+           value: function autolink(src, mangle) {
+             var cap = this.rules.inline.autolink.exec(src);

 
 

-         function qaSaveButtons(selection) {
-           var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-           var buttonSection = selection.selectAll('.buttons')
-             .data((isSelected ? [_qaItem] : []), function (d) { return d.status + d.id; });
+             if (cap) {
+               var text, href;

 
 

-           // exit
-           buttonSection.exit()
-             .remove();
+               if (cap[2] === '@') {
+                 text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
+                 href = 'mailto:' + text;
+               } else {
+                 text = _escape(cap[1]);
+                 href = text;
+               }

 
 

-           // enter
-           var buttonEnter = buttonSection.enter()
-             .append('div')
-               .attr('class', 'buttons');
+               return {
+                 type: 'link',
+                 raw: cap[0],
+                 text: text,
+                 href: href,
+                 tokens: [{
+                   type: 'text',
+                   raw: text,
+                   text: text
+                 }]
+               };
+             }
+           }
+         }, {
+           key: "url",
+           value: function url(src, mangle) {
+             var cap;

 
 

-           buttonEnter
-             .append('button')
-               .attr('class', 'button comment-button action')
-               .text(_t('QA.keepRight.save_comment'));
+             if (cap = this.rules.inline.url.exec(src)) {
+               var text, href;

 
 

-           buttonEnter
-             .append('button')
-               .attr('class', 'button close-button action');
+               if (cap[2] === '@') {
+                 text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
+                 href = 'mailto:' + text;
+               } else {
+                 // do extended autolink path validation
+                 var prevCapZero;

 
 

-           buttonEnter
-             .append('button')
-               .attr('class', 'button ignore-button action');
+                 do {
+                   prevCapZero = cap[0];
+                   cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
+                 } while (prevCapZero !== cap[0]);

 
 

-           // update
-           buttonSection = buttonSection
-             .merge(buttonEnter);
+                 text = _escape(cap[0]);

 
 

-           buttonSection.select('.comment-button')
-             .attr('disabled', function (d) { return d.newComment ? null : true; })
-             .on('click.comment', function(d) {
-               this.blur();    // avoid keeping focus on the button - #4641
-               var qaService = services.improveOSM;
-               if (qaService) {
-                 qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
+                 if (cap[1] === 'www.') {
+                   href = 'http://' + text;
+                 } else {
+                   href = text;
+                 }

                }
                }

-             });

 
 

-           buttonSection.select('.close-button')
-             .text(function (d) {
-               var andComment = (d.newComment ? '_comment' : '');
-               return _t(("QA.keepRight.close" + andComment));
-             })
-             .on('click.close', function(d) {
-               this.blur();    // avoid keeping focus on the button - #4641
-               var qaService = services.improveOSM;
-               if (qaService) {
-                 d.newStatus = 'SOLVED';
-                 qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-               }
-             });
+               return {
+                 type: 'link',
+                 raw: cap[0],
+                 text: text,
+                 href: href,
+                 tokens: [{
+                   type: 'text',
+                   raw: text,
+                   text: text
+                 }]
+               };
+             }
+           }
+         }, {
+           key: "inlineText",
+           value: function inlineText(src, inRawBlock, smartypants) {
+             var cap = this.rules.inline.text.exec(src);

 
 

-           buttonSection.select('.ignore-button')
-             .text(function (d) {
-               var andComment = (d.newComment ? '_comment' : '');
-               return _t(("QA.keepRight.ignore" + andComment));
-             })
-             .on('click.ignore', function(d) {
-               this.blur();    // avoid keeping focus on the button - #4641
-               var qaService = services.improveOSM;
-               if (qaService) {
-                 d.newStatus = 'INVALID';
-                 qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
+             if (cap) {
+               var text;
+
+               if (inRawBlock) {
+                 text = this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0];
+               } else {
+                 text = _escape(this.options.smartypants ? smartypants(cap[0]) : cap[0]);

                }
                }

-             });
-         }

 
 

-         // NOTE: Don't change method name until UI v3 is merged
-         improveOsmEditor.error = function(val) {
-           if (!arguments.length) { return _qaItem; }
-           _qaItem = val;
-           return improveOsmEditor;
-         };
+               return {
+                 type: 'text',
+                 raw: cap[0],
+                 text: text
+               };
+             }
+           }
+         }]);

 
 

-         return utilRebind(improveOsmEditor, dispatch$1, 'on');
-       }
+         return Tokenizer;
+       }();

 
 

-       function uiKeepRightDetails(context) {
-         var _qaItem;
+       var noopTest = helpers.noopTest,
+           edit = helpers.edit,
+           merge$1 = helpers.merge;
+       /**
+        * Block-Level Grammar
+        */

 
 

+       var block$1 = {
+         newline: /^(?: *(?:\n|$))+/,
+         code: /^( {4}[^\n]+(?:\n(?: *(?:\n|$))*)?)+/,
+         fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)/,
+         hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
+         heading: /^ {0,3}(#{1,6})(?=\s|$)(.*)(?:\n+|$)/,
+         blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
+         list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?! {0,3}bull )\n*|\s*$)/,
+         html: '^ {0,3}(?:' // optional indentation
+         + '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
+         + '|comment[^\\n]*(\\n+|$)' // (2)
+         + '|<\\?[\\s\\S]*?(?:\\?>\\n*|$)' // (3)
+         + '|<![A-Z][\\s\\S]*?(?:>\\n*|$)' // (4)
+         + '|<!\\[CDATA\\[[\\s\\S]*?(?:\\]\\]>\\n*|$)' // (5)
+         + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (6)
+         + '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) open tag
+         + '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) closing tag
+         + ')',
+         def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
+         nptable: noopTest,
+         table: noopTest,
+         lheading: /^([^\n]+)\n {0,3}(=+|-+) *(?:\n+|$)/,
+         // regex template, placeholders will be replaced according to different paragraph
+         // interruption rules of commonmark and the original markdown spec:
+         _paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html| +\n)[^\n]+)*)/,
+         text: /^[^\n]+/
+       };
+       block$1._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
+       block$1._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
+       block$1.def = edit(block$1.def).replace('label', block$1._label).replace('title', block$1._title).getRegex();
+       block$1.bullet = /(?:[*+-]|\d{1,9}[.)])/;
+       block$1.item = /^( *)(bull) ?[^\n]*(?:\n(?! *bull ?)[^\n]*)*/;
+       block$1.item = edit(block$1.item, 'gm').replace(/bull/g, block$1.bullet).getRegex();
+       block$1.listItemStart = edit(/^( *)(bull) */).replace('bull', block$1.bullet).getRegex();
+       block$1.list = edit(block$1.list).replace(/bull/g, block$1.bullet).replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))').replace('def', '\\n+(?=' + block$1.def.source + ')').getRegex();
+       block$1._tag = 'address|article|aside|base|basefont|blockquote|body|caption' + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption' + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe' + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option' + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr' + '|track|ul';
+       block$1._comment = /<!--(?!-?>)[\s\S]*?(?:-->|$)/;
+       block$1.html = edit(block$1.html, 'i').replace('comment', block$1._comment).replace('tag', block$1._tag).replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/).getRegex();
+       block$1.paragraph = edit(block$1._paragraph).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
+       .replace('blockquote', ' {0,3}>').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+       .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // pars can be interrupted by type (6) html blocks
+       .getRegex();
+       block$1.blockquote = edit(block$1.blockquote).replace('paragraph', block$1.paragraph).getRegex();
+       /**
+        * Normal Block Grammar
+        */

 
 

-         function issueDetail(d) {
-           var itemType = d.itemType;
-           var parentIssueType = d.parentIssueType;
-           var unknown = _t('inspector.unknown');
-           var replacements = d.replacements || {};
-           replacements.default = unknown;  // special key `default` works as a fallback string
+       block$1.normal = merge$1({}, block$1);
+       /**
+        * GFM Block Grammar
+        */

 
 

-           var detail = _t(("QA.keepRight.errorTypes." + itemType + ".description"), replacements);
-           if (detail === unknown) {
-             detail = _t(("QA.keepRight.errorTypes." + parentIssueType + ".description"), replacements);
-           }
-           return detail;
-         }
+       block$1.gfm = merge$1({}, block$1.normal, {
+         nptable: '^ *([^|\\n ].*\\|.*)\\n' // Header
+         + ' {0,3}([-:]+ *\\|[-| :]*)' // Align
+         + '(?:\\n((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)',
+         // Cells
+         table: '^ *\\|(.+)\\n' // Header
+         + ' {0,3}\\|?( *[-:]+[-| :]*)' // Align
+         + '(?:\\n *((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells

 
 

+       });
+       block$1.gfm.nptable = edit(block$1.gfm.nptable).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+       .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // tables can be interrupted by type (6) html blocks
+       .getRegex();
+       block$1.gfm.table = edit(block$1.gfm.table).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+       .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // tables can be interrupted by type (6) html blocks
+       .getRegex();
+       /**
+        * Pedantic grammar (original John Gruber's loose markdown specification)
+        */

 
 

-         function keepRightDetails(selection) {
-           var details = selection.selectAll('.error-details')
-             .data(
-               (_qaItem ? [_qaItem] : []),
-               function (d) { return ((d.id) + "-" + (d.status || 0)); }
-             );
+       block$1.pedantic = merge$1({}, block$1.normal, {
+         html: edit('^ *(?:comment *(?:\\n|\\s*$)' + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
+         + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))').replace('comment', block$1._comment).replace(/tag/g, '(?!(?:' + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub' + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)' + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b').getRegex(),
+         def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
+         heading: /^(#{1,6})(.*)(?:\n+|$)/,
+         fences: noopTest,
+         // fences not supported
+         paragraph: edit(block$1.normal._paragraph).replace('hr', block$1.hr).replace('heading', ' *#{1,6} *[^\n]').replace('lheading', block$1.lheading).replace('blockquote', ' {0,3}>').replace('|fences', '').replace('|list', '').replace('|html', '').getRegex()
+       });
+       /**
+        * Inline-Level Grammar
+        */

 
 

-           details.exit()
-             .remove();
+       var inline$1 = {
+         escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
+         autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
+         url: noopTest,
+         tag: '^comment' + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
+         + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
+         + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
+         + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
+         + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>',
+         // CDATA section
+         link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
+         reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
+         nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
+         reflinkSearch: 'reflink|nolink(?!\\()',
+         emStrong: {
+           lDelim: /^(?:\*+(?:([punct_])|[^\s*]))|^_+(?:([punct*])|([^\s_]))/,
+           //        (1) and (2) can only be a Right Delimiter. (3) and (4) can only be Left.  (5) and (6) can be either Left or Right.
+           //        () Skip other delimiter (1) #***                   (2) a***#, a***                   (3) #***a, ***a                 (4) ***#              (5) #***#                 (6) a***a
+           rDelimAst: /\_\_[^_*]*?\*[^_*]*?\_\_|[punct_](\*+)(?=[\s]|$)|[^punct*_\s](\*+)(?=[punct_\s]|$)|[punct_\s](\*+)(?=[^punct*_\s])|[\s](\*+)(?=[punct_])|[punct_](\*+)(?=[punct_])|[^punct*_\s](\*+)(?=[^punct*_\s])/,
+           rDelimUnd: /\*\*[^_*]*?\_[^_*]*?\*\*|[punct*](\_+)(?=[\s]|$)|[^punct*_\s](\_+)(?=[punct*\s]|$)|[punct*\s](\_+)(?=[^punct*_\s])|[\s](\_+)(?=[punct*])|[punct*](\_+)(?=[punct*])/ // ^- Not allowed for _

 
 

-           var detailsEnter = details.enter()
-             .append('div')
-               .attr('class', 'error-details qa-details-container');
+         },
+         code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
+         br: /^( {2,}|\\)\n(?!\s*$)/,
+         del: noopTest,
+         text: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*_]|\b_|$)|[^ ](?= {2,}\n)))/,
+         punctuation: /^([\spunctuation])/
+       }; // list of punctuation marks from CommonMark spec
+       // without * and _ to handle the different emphasis markers * and _
+
+       inline$1._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
+       inline$1.punctuation = edit(inline$1.punctuation).replace(/punctuation/g, inline$1._punctuation).getRegex(); // sequences em should skip over [title](link), `code`, <html>
+
+       inline$1.blockSkip = /\[[^\]]*?\]\([^\)]*?\)|`[^`]*?`|<[^>]*?>/g;
+       inline$1.escapedEmSt = /\\\*|\\_/g;
+       inline$1._comment = edit(block$1._comment).replace('(?:-->|$)', '-->').getRegex();
+       inline$1.emStrong.lDelim = edit(inline$1.emStrong.lDelim).replace(/punct/g, inline$1._punctuation).getRegex();
+       inline$1.emStrong.rDelimAst = edit(inline$1.emStrong.rDelimAst, 'g').replace(/punct/g, inline$1._punctuation).getRegex();
+       inline$1.emStrong.rDelimUnd = edit(inline$1.emStrong.rDelimUnd, 'g').replace(/punct/g, inline$1._punctuation).getRegex();
+       inline$1._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
+       inline$1._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
+       inline$1._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
+       inline$1.autolink = edit(inline$1.autolink).replace('scheme', inline$1._scheme).replace('email', inline$1._email).getRegex();
+       inline$1._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
+       inline$1.tag = edit(inline$1.tag).replace('comment', inline$1._comment).replace('attribute', inline$1._attribute).getRegex();
+       inline$1._label = /(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
+       inline$1._href = /<(?:\\.|[^\n<>\\])+>|[^\s\x00-\x1f]*/;
+       inline$1._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
+       inline$1.link = edit(inline$1.link).replace('label', inline$1._label).replace('href', inline$1._href).replace('title', inline$1._title).getRegex();
+       inline$1.reflink = edit(inline$1.reflink).replace('label', inline$1._label).getRegex();
+       inline$1.reflinkSearch = edit(inline$1.reflinkSearch, 'g').replace('reflink', inline$1.reflink).replace('nolink', inline$1.nolink).getRegex();
+       /**
+        * Normal Inline Grammar
+        */

 
 

-           // description
-           var descriptionEnter = detailsEnter
-             .append('div')
-               .attr('class', 'qa-details-subsection');
+       inline$1.normal = merge$1({}, inline$1);
+       /**
+        * Pedantic Inline Grammar
+        */

 
 

-           descriptionEnter
-             .append('h4')
-               .text(function () { return _t('QA.keepRight.detail_description'); });
+       inline$1.pedantic = merge$1({}, inline$1.normal, {
+         strong: {
+           start: /^__|\*\*/,
+           middle: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
+           endAst: /\*\*(?!\*)/g,
+           endUnd: /__(?!_)/g
+         },
+         em: {
+           start: /^_|\*/,
+           middle: /^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,
+           endAst: /\*(?!\*)/g,
+           endUnd: /_(?!_)/g
+         },
+         link: edit(/^!?\[(label)\]\((.*?)\)/).replace('label', inline$1._label).getRegex(),
+         reflink: edit(/^!?\[(label)\]\s*\[([^\]]*)\]/).replace('label', inline$1._label).getRegex()
+       });
+       /**
+        * GFM Inline Grammar
+        */

 
 

-           descriptionEnter
-             .append('div')
-               .attr('class', 'qa-details-description-text')
-               .html(issueDetail);
+       inline$1.gfm = merge$1({}, inline$1.normal, {
+         escape: edit(inline$1.escape).replace('])', '~|])').getRegex(),
+         _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
+         url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
+         _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
+         del: /^(~~?)(?=[^\s~])([\s\S]*?[^\s~])\1(?=[^~]|$)/,
+         text: /^([`~]+|[^`~])(?:(?= {2,}\n)|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)|[\s\S]*?(?:(?=[\\<!\[`*~_]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)))/
+       });
+       inline$1.gfm.url = edit(inline$1.gfm.url, 'i').replace('email', inline$1.gfm._extended_email).getRegex();
+       /**
+        * GFM + Line Breaks Inline Grammar
+        */

 
 

-           // If there are entity links in the error message..
-           var relatedEntities = [];
-           descriptionEnter.selectAll('.error_entity_link, .error_object_link')
-             .each(function() {
-               var link = select(this);
-               var isObjectLink = link.classed('error_object_link');
-               var entityID = isObjectLink ?
-                 (utilEntityRoot(_qaItem.objectType) + _qaItem.objectId)
-                 : this.textContent;
-               var entity = context.hasEntity(entityID);
+       inline$1.breaks = merge$1({}, inline$1.gfm, {
+         br: edit(inline$1.br).replace('{2,}', '*').getRegex(),
+         text: edit(inline$1.gfm.text).replace('\\b_', '\\b_| {2,}\\n').replace(/\{2,\}/g, '*').getRegex()
+       });
+       var rules = {
+         block: block$1,
+         inline: inline$1
+       };

 
 

-               relatedEntities.push(entityID);
+       var Tokenizer$1 = Tokenizer_1;
+       var defaults$3 = defaults$5.exports.defaults;
+       var block = rules.block,
+           inline = rules.inline;
+       var repeatString = helpers.repeatString;
+       /**
+        * smartypants text replacement
+        */

 
 

-               // Add click handler
-               link
-                 .on('mouseenter', function () {
-                   utilHighlightEntities([entityID], true, context);
-                 })
-                 .on('mouseleave', function () {
-                   utilHighlightEntities([entityID], false, context);
-                 })
-                 .on('click', function () {
-                   event.preventDefault();
+       function smartypants(text) {
+         return text // em-dashes
+         .replace(/---/g, "\u2014") // en-dashes
+         .replace(/--/g, "\u2013") // opening singles
+         .replace(/(^|[-\u2014/(\[{"\s])'/g, "$1\u2018") // closing singles & apostrophes
+         .replace(/'/g, "\u2019") // opening doubles
+         .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, "$1\u201C") // closing doubles
+         .replace(/"/g, "\u201D") // ellipses
+         .replace(/\.{3}/g, "\u2026");
+       }
+       /**
+        * mangle email addresses
+        */

 
 

-                   utilHighlightEntities([entityID], false, context);

 
 

-                   var osmlayer = context.layers().layer('osm');
-                   if (!osmlayer.enabled()) {
-                     osmlayer.enabled(true);
-                   }
+       function mangle(text) {
+         var out = '',
+             i,
+             ch;
+         var l = text.length;

 
 

-                   context.map().centerZoomEase(_qaItem.loc, 20);
+         for (i = 0; i < l; i++) {
+           ch = text.charCodeAt(i);

 
 

-                   if (entity) {
-                     context.enter(modeSelect(context, [entityID]));
-                   } else {
-                     context.loadEntity(entityID, function () {
-                       context.enter(modeSelect(context, [entityID]));
-                     });
-                   }
-                 });
+           if (Math.random() > 0.5) {
+             ch = 'x' + ch.toString(16);
+           }

 
 

-               // Replace with friendly name if possible
-               // (The entity may not yet be loaded into the graph)
-               if (entity) {
-                 var name = utilDisplayName(entity);  // try to use common name
+           out += '&#' + ch + ';';
+         }

 
 

-                 if (!name && !isObjectLink) {
-                   var preset = _mainPresetIndex.match(entity, context.graph());
-                   name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
-                 }
+         return out;
+       }
+       /**
+        * Block Lexer
+        */

 
 

-                 if (name) {
-                   this.innerText = name;
-                 }
-               }
-             });

 
 

-           // Don't hide entities related to this issue - #5880
-           context.features().forceVisible(relatedEntities);
-           context.map().pan([0,0]);  // trigger a redraw
-         }
+       var Lexer_1 = /*#__PURE__*/function () {
+         function Lexer(options) {
+           _classCallCheck$1(this, Lexer);

 
 

-         keepRightDetails.issue = function(val) {
-           if (!arguments.length) { return _qaItem; }
-           _qaItem = val;
-           return keepRightDetails;
-         };
+           this.tokens = [];
+           this.tokens.links = Object.create(null);
+           this.options = options || defaults$3;
+           this.options.tokenizer = this.options.tokenizer || new Tokenizer$1();
+           this.tokenizer = this.options.tokenizer;
+           this.tokenizer.options = this.options;
+           var rules = {
+             block: block.normal,
+             inline: inline.normal
+           };

 
 

-         return keepRightDetails;
-       }
+           if (this.options.pedantic) {
+             rules.block = block.pedantic;
+             rules.inline = inline.pedantic;
+           } else if (this.options.gfm) {
+             rules.block = block.gfm;

 
 

-       function uiKeepRightHeader() {
-         var _qaItem;
+             if (this.options.breaks) {
+               rules.inline = inline.breaks;
+             } else {
+               rules.inline = inline.gfm;
+             }
+           }

 
 

+           this.tokenizer.rules = rules;
+         }
+         /**
+          * Expose Rules
+          */

 
 

-         function issueTitle(d) {
-           var itemType = d.itemType;
-           var parentIssueType = d.parentIssueType;
-           var unknown = _t('inspector.unknown');
-           var replacements = d.replacements || {};
-           replacements.default = unknown;  // special key `default` works as a fallback string

 
 

-           var title = _t(("QA.keepRight.errorTypes." + itemType + ".title"), replacements);
-           if (title === unknown) {
-             title = _t(("QA.keepRight.errorTypes." + parentIssueType + ".title"), replacements);
+         _createClass$1(Lexer, [{
+           key: "lex",
+           value:
+           /**
+            * Preprocessing
+            */
+           function lex(src) {
+             src = src.replace(/\r\n|\r/g, '\n').replace(/\t/g, '    ');
+             this.blockTokens(src, this.tokens, true);
+             this.inline(this.tokens);
+             return this.tokens;

            }
            }

-           return title;
-         }
+           /**
+            * Lexing
+            */

 
 

+         }, {
+           key: "blockTokens",
+           value: function blockTokens(src) {
+             var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+             var top = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;

 
 

-         function keepRightHeader(selection) {
-           var header = selection.selectAll('.qa-header')
-             .data(
-               (_qaItem ? [_qaItem] : []),
-               function (d) { return ((d.id) + "-" + (d.status || 0)); }
-             );
+             if (this.options.pedantic) {
+               src = src.replace(/^ +$/gm, '');
+             }

 
 

-           header.exit()
-             .remove();
+             var token, i, l, lastToken;

 
 

-           var headerEnter = header.enter()
-             .append('div')
-               .attr('class', 'qa-header');
+             while (src) {
+               // newline
+               if (token = this.tokenizer.space(src)) {
+                 src = src.substring(token.raw.length);
+
+                 if (token.type) {
+                   tokens.push(token);
+                 }

 
 

-           var iconEnter = headerEnter
-             .append('div')
-               .attr('class', 'qa-header-icon')
-               .classed('new', function (d) { return d.id < 0; });
+                 continue;
+               } // code

 
 

-           iconEnter
-             .append('div')
-               .attr('class', function (d) { return ("preset-icon-28 qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.parentIssueType)); })
-               .call(svgIcon('#iD-icon-bolt', 'qaItem-fill'));

 
 

-           headerEnter
-             .append('div')
-               .attr('class', 'qa-header-label')
-               .text(issueTitle);
-         }
+               if (token = this.tokenizer.code(src)) {
+                 src = src.substring(token.raw.length);
+                 lastToken = tokens[tokens.length - 1]; // An indented code block cannot interrupt a paragraph.

 
 

+                 if (lastToken && lastToken.type === 'paragraph') {
+                   lastToken.raw += '\n' + token.raw;
+                   lastToken.text += '\n' + token.text;
+                 } else {
+                   tokens.push(token);
+                 }

 
 

-         keepRightHeader.issue = function(val) {
-           if (!arguments.length) { return _qaItem; }
-           _qaItem = val;
-           return keepRightHeader;
-         };
+                 continue;
+               } // fences

 
 

-         return keepRightHeader;
-       }

 
 

-       function uiViewOnKeepRight() {
-         var _qaItem;
+               if (token = this.tokenizer.fences(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // heading

 
 

-         function viewOnKeepRight(selection) {
-           var url;
-           if (services.keepRight && (_qaItem instanceof QAItem)) {
-             url = services.keepRight.issueURL(_qaItem);
-           }

 
 

-           var link = selection.selectAll('.view-on-keepRight')
-             .data(url ? [url] : []);
+               if (token = this.tokenizer.heading(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // table no leading pipe (gfm)

 
 

-           // exit
-           link.exit()
-             .remove();

 
 

-           // enter
-           var linkEnter = link.enter()
-             .append('a')
-               .attr('class', 'view-on-keepRight')
-               .attr('target', '_blank')
-               .attr('rel', 'noopener') // security measure
-               .attr('href', function (d) { return d; })
-               .call(svgIcon('#iD-icon-out-link', 'inline'));
+               if (token = this.tokenizer.nptable(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // hr

 
 

-           linkEnter
-             .append('span')
-               .text(_t('inspector.view_on_keepRight'));
-         }

 
 

-         viewOnKeepRight.what = function(val) {
-           if (!arguments.length) { return _qaItem; }
-           _qaItem = val;
-           return viewOnKeepRight;
-         };
+               if (token = this.tokenizer.hr(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // blockquote

 
 

-         return viewOnKeepRight;
-       }

 
 

-       function uiKeepRightEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var qaDetails = uiKeepRightDetails(context);
-         var qaHeader = uiKeepRightHeader();
+               if (token = this.tokenizer.blockquote(src)) {
+                 src = src.substring(token.raw.length);
+                 token.tokens = this.blockTokens(token.text, [], top);
+                 tokens.push(token);
+                 continue;
+               } // list

 
 

-         var _qaItem;

 
 

-         function keepRightEditor(selection) {
+               if (token = this.tokenizer.list(src)) {
+                 src = src.substring(token.raw.length);
+                 l = token.items.length;

 
 

-           var headerEnter = selection.selectAll('.header')
-             .data([0])
-             .enter()
-             .append('div')
-               .attr('class', 'header fillL');
+                 for (i = 0; i < l; i++) {
+                   token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
+                 }

 
 

-           headerEnter
-             .append('button')
-               .attr('class', 'close')
-               .on('click', function () { return context.enter(modeBrowse(context)); })
-               .call(svgIcon('#iD-icon-close'));
+                 tokens.push(token);
+                 continue;
+               } // html

 
 

-           headerEnter
-             .append('h3')
-               .text(_t('QA.keepRight.title'));

 
 

+               if (token = this.tokenizer.html(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // def

 
 

-           var body = selection.selectAll('.body')
-             .data([0]);

 
 

-           body = body.enter()
-             .append('div')
-               .attr('class', 'body')
-             .merge(body);
+               if (top && (token = this.tokenizer.def(src))) {
+                 src = src.substring(token.raw.length);

 
 

-           var editor = body.selectAll('.qa-editor')
-             .data([0]);
+                 if (!this.tokens.links[token.tag]) {
+                   this.tokens.links[token.tag] = {
+                     href: token.href,
+                     title: token.title
+                   };
+                 }

 
 

-           editor.enter()
-             .append('div')
-               .attr('class', 'modal-section qa-editor')
-             .merge(editor)
-               .call(qaHeader.issue(_qaItem))
-               .call(qaDetails.issue(_qaItem))
-               .call(keepRightSaveSection);
+                 continue;
+               } // table (gfm)

 
 
 
 

-           var footer = selection.selectAll('.footer')
-             .data([0]);
+               if (token = this.tokenizer.table(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // lheading

 
 

-           footer.enter()
-             .append('div')
-             .attr('class', 'footer')
-             .merge(footer)
-             .call(uiViewOnKeepRight().what(_qaItem));
-         }

 
 

+               if (token = this.tokenizer.lheading(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // top-level paragraph

 
 

-         function keepRightSaveSection(selection) {
-           var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-           var isShown = (_qaItem && (isSelected || _qaItem.newComment || _qaItem.comment));
-           var saveSection = selection.selectAll('.qa-save')
-             .data(
-               (isShown ? [_qaItem] : []),
-               function (d) { return ((d.id) + "-" + (d.status || 0)); }
-             );

 
 

-           // exit
-           saveSection.exit()
-             .remove();
+               if (top && (token = this.tokenizer.paragraph(src))) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // text

 
 

-           // enter
-           var saveSectionEnter = saveSection.enter()
-             .append('div')
-               .attr('class', 'qa-save save-section cf');
-
-           saveSectionEnter
-             .append('h4')
-               .attr('class', '.qa-save-header')
-               .text(_t('QA.keepRight.comment'));
-
-           saveSectionEnter
-             .append('textarea')
-               .attr('class', 'new-comment-input')
-               .attr('placeholder', _t('QA.keepRight.comment_placeholder'))
-               .attr('maxlength', 1000)
-               .property('value', function (d) { return d.newComment || d.comment; })
-               .call(utilNoAuto)
-               .on('input', changeInput)
-               .on('blur', changeInput);

 
 

-           // update
-           saveSection = saveSectionEnter
-             .merge(saveSection)
-               .call(qaSaveButtons);
+               if (token = this.tokenizer.text(src)) {
+                 src = src.substring(token.raw.length);
+                 lastToken = tokens[tokens.length - 1];

 
 

-           function changeInput() {
-             var input = select(this);
-             var val = input.property('value').trim();
+                 if (lastToken && lastToken.type === 'text') {
+                   lastToken.raw += '\n' + token.raw;
+                   lastToken.text += '\n' + token.text;
+                 } else {
+                   tokens.push(token);
+                 }

 
 

-             if (val === _qaItem.comment) {
-               val = undefined;
-             }
+                 continue;
+               }

 
 

-             // store the unsaved comment with the issue itself
-             _qaItem = _qaItem.update({ newComment: val });
+               if (src) {
+                 var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);

 
 

-             var qaService = services.keepRight;
-             if (qaService) {
-               qaService.replaceItem(_qaItem);  // update keepright cache
+                 if (this.options.silent) {
+                   console.error(errMsg);
+                   break;
+                 } else {
+                   throw new Error(errMsg);
+                 }
+               }

              }
 
              }
 

-             saveSection
-               .call(qaSaveButtons);
+             return tokens;

            }
            }

-         }
+         }, {
+           key: "inline",
+           value: function inline(tokens) {
+             var i, j, k, l2, row, token;
+             var l = tokens.length;
+
+             for (i = 0; i < l; i++) {
+               token = tokens[i];
+
+               switch (token.type) {
+                 case 'paragraph':
+                 case 'text':
+                 case 'heading':
+                   {
+                     token.tokens = [];
+                     this.inlineTokens(token.text, token.tokens);
+                     break;
+                   }

 
 

+                 case 'table':
+                   {
+                     token.tokens = {
+                       header: [],
+                       cells: []
+                     }; // header

 
 

-         function qaSaveButtons(selection) {
-           var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-           var buttonSection = selection.selectAll('.buttons')
-             .data((isSelected ? [_qaItem] : []), function (d) { return d.status + d.id; });
+                     l2 = token.header.length;

 
 

-           // exit
-           buttonSection.exit()
-             .remove();
+                     for (j = 0; j < l2; j++) {
+                       token.tokens.header[j] = [];
+                       this.inlineTokens(token.header[j], token.tokens.header[j]);
+                     } // cells

 
 

-           // enter
-           var buttonEnter = buttonSection.enter()
-             .append('div')
-               .attr('class', 'buttons');

 
 

-           buttonEnter
-             .append('button')
-               .attr('class', 'button comment-button action')
-               .text(_t('QA.keepRight.save_comment'));
+                     l2 = token.cells.length;

 
 

-           buttonEnter
-             .append('button')
-               .attr('class', 'button close-button action');
+                     for (j = 0; j < l2; j++) {
+                       row = token.cells[j];
+                       token.tokens.cells[j] = [];

 
 

-           buttonEnter
-             .append('button')
-               .attr('class', 'button ignore-button action');
+                       for (k = 0; k < row.length; k++) {
+                         token.tokens.cells[j][k] = [];
+                         this.inlineTokens(row[k], token.tokens.cells[j][k]);
+                       }
+                     }

 
 

-           // update
-           buttonSection = buttonSection
-             .merge(buttonEnter);
+                     break;
+                   }

 
 

-           buttonSection.select('.comment-button')   // select and propagate data
-             .attr('disabled', function (d) { return d.newComment ? null : true; })
-             .on('click.comment', function(d) {
-               this.blur();    // avoid keeping focus on the button - #4641
-               var qaService = services.keepRight;
-               if (qaService) {
-                 qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-               }
-             });
+                 case 'blockquote':
+                   {
+                     this.inline(token.tokens);
+                     break;
+                   }

 
 

-           buttonSection.select('.close-button')   // select and propagate data
-             .text(function (d) {
-               var andComment = (d.newComment ? '_comment' : '');
-               return _t(("QA.keepRight.close" + andComment));
-             })
-             .on('click.close', function(d) {
-               this.blur();    // avoid keeping focus on the button - #4641
-               var qaService = services.keepRight;
-               if (qaService) {
-                 d.newStatus = 'ignore_t';   // ignore temporarily (item fixed)
-                 qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-               }
-             });
+                 case 'list':
+                   {
+                     l2 = token.items.length;

 
 

-           buttonSection.select('.ignore-button')   // select and propagate data
-             .text(function (d) {
-               var andComment = (d.newComment ? '_comment' : '');
-               return _t(("QA.keepRight.ignore" + andComment));
-             })
-             .on('click.ignore', function(d) {
-               this.blur();    // avoid keeping focus on the button - #4641
-               var qaService = services.keepRight;
-               if (qaService) {
-                 d.newStatus = 'ignore';   // ignore permanently (false positive)
-                 qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
+                     for (j = 0; j < l2; j++) {
+                       this.inline(token.items[j].tokens);
+                     }
+
+                     break;
+                   }

                }
                }

-             });
-         }
+             }

 
 

-         // NOTE: Don't change method name until UI v3 is merged
-         keepRightEditor.error = function(val) {
-           if (!arguments.length) { return _qaItem; }
-           _qaItem = val;
-           return keepRightEditor;
-         };
+             return tokens;
+           }
+           /**
+            * Lexing/Compiling
+            */

 
 

-         return utilRebind(keepRightEditor, dispatch$1, 'on');
-       }
+         }, {
+           key: "inlineTokens",
+           value: function inlineTokens(src) {
+             var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+             var inLink = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+             var inRawBlock = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;
+             var token, lastToken; // String with links masked to avoid interference with em and strong

 
 

-       function uiOsmoseDetails(context) {
-         var _qaItem;
+             var maskedSrc = src;
+             var match;
+             var keepPrevChar, prevChar; // Mask out reflinks

 
 

-         function issueString(d, type) {
-           if (!d) { return ''; }
+             if (this.tokens.links) {
+               var links = Object.keys(this.tokens.links);

 
 

-           // Issue strings are cached from Osmose API
-           var s = services.osmose.getStrings(d.itemType);
-           return (type in s) ? s[type] : '';
-         }
+               if (links.length > 0) {
+                 while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
+                   if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
+                     maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
+                   }
+                 }
+               }
+             } // Mask out other blocks

 
 
 
 

-         function osmoseDetails(selection) {
-           var details = selection.selectAll('.error-details')
-             .data(
-               _qaItem ? [_qaItem] : [],
-               function (d) { return ((d.id) + "-" + (d.status || 0)); }
-             );
+             while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
+               maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
+             } // Mask out escaped em & strong delimiters

 
 

-           details.exit()
-             .remove();

 
 

-           var detailsEnter = details.enter()
-             .append('div')
-               .attr('class', 'error-details qa-details-container');
+             while ((match = this.tokenizer.rules.inline.escapedEmSt.exec(maskedSrc)) != null) {
+               maskedSrc = maskedSrc.slice(0, match.index) + '++' + maskedSrc.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex);
+             }

 
 

+             while (src) {
+               if (!keepPrevChar) {
+                 prevChar = '';
+               }

 
 

-           // Description
-           if (issueString(_qaItem, 'detail')) {
-             var div = detailsEnter
-               .append('div')
-                 .attr('class', 'qa-details-subsection');
+               keepPrevChar = false; // escape

 
 

-             div
-               .append('h4')
-                 .text(function () { return _t('QA.keepRight.detail_description'); });
+               if (token = this.tokenizer.escape(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // tag

 
 

-             div
-               .append('p')
-                 .attr('class', 'qa-details-description-text')
-                 .html(function (d) { return issueString(d, 'detail'); })
-               .selectAll('a')
-                 .attr('rel', 'noopener')
-                 .attr('target', '_blank');
-           }

 
 

-           // Elements (populated later as data is requested)
-           var detailsDiv = detailsEnter
-             .append('div')
-               .attr('class', 'qa-details-subsection');
+               if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
+                 src = src.substring(token.raw.length);
+                 inLink = token.inLink;
+                 inRawBlock = token.inRawBlock;
+                 var _lastToken = tokens[tokens.length - 1];

 
 

-           var elemsDiv = detailsEnter
-             .append('div')
-               .attr('class', 'qa-details-subsection');
+                 if (_lastToken && token.type === 'text' && _lastToken.type === 'text') {
+                   _lastToken.raw += token.raw;
+                   _lastToken.text += token.text;
+                 } else {
+                   tokens.push(token);
+                 }

 
 

-           // Suggested Fix (musn't exist for every issue type)
-           if (issueString(_qaItem, 'fix')) {
-             var div$1 = detailsEnter
-               .append('div')
-                 .attr('class', 'qa-details-subsection');
+                 continue;
+               } // link

 
 

-             div$1
-               .append('h4')
-                 .text(function () { return _t('QA.osmose.fix_title'); });

 
 

-             div$1
-               .append('p')
-                 .html(function (d) { return issueString(d, 'fix'); })
-               .selectAll('a')
-                 .attr('rel', 'noopener')
-                 .attr('target', '_blank');
-           }
+               if (token = this.tokenizer.link(src)) {
+                 src = src.substring(token.raw.length);

 
 

-           // Common Pitfalls (musn't exist for every issue type)
-           if (issueString(_qaItem, 'trap')) {
-             var div$2 = detailsEnter
-               .append('div')
-                 .attr('class', 'qa-details-subsection');
+                 if (token.type === 'link') {
+                   token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+                 }

 
 

-             div$2
-               .append('h4')
-                 .text(function () { return _t('QA.osmose.trap_title'); });
+                 tokens.push(token);
+                 continue;
+               } // reflink, nolink

 
 

-             div$2
-               .append('p')
-                 .html(function (d) { return issueString(d, 'trap'); })
-               .selectAll('a')
-                 .attr('rel', 'noopener')
-                 .attr('target', '_blank');
-           }

 
 

-           // Save current item to check if UI changed by time request resolves
-           var thisItem = _qaItem;
-           services.osmose.loadIssueDetail(_qaItem)
-             .then(function (d) {
-               // No details to add if there are no associated issue elements
-               if (!d.elems || d.elems.length === 0) { return; }
+               if (token = this.tokenizer.reflink(src, this.tokens.links)) {
+                 src = src.substring(token.raw.length);
+                 var _lastToken2 = tokens[tokens.length - 1];

 
 

-               // Do nothing if UI has moved on by the time this resolves
-               if (
-                 context.selectedErrorID() !== thisItem.id
-                 && context.container().selectAll((".qaItem.osmose.hover.itemId-" + (thisItem.id))).empty()
-               ) { return; }
-
-               // Things like keys and values are dynamically added to a subtitle string
-               if (d.detail) {
-                 detailsDiv
-                   .append('h4')
-                     .text(function () { return _t('QA.osmose.detail_title'); });
-
-                 detailsDiv
-                   .append('p')
-                     .html(function (d) { return d.detail; })
-                   .selectAll('a')
-                     .attr('rel', 'noopener')
-                     .attr('target', '_blank');
-               }
-
-               // Create list of linked issue elements
-               elemsDiv
-                 .append('h4')
-                   .text(function () { return _t('QA.osmose.elems_title'); });
-
-               elemsDiv
-                 .append('ul').selectAll('li')
-                 .data(d.elems)
-                 .enter()
-                 .append('li')
-                 .append('a')
-                   .attr('class', 'error_entity_link')
-                   .text(function (d) { return d; })
-                   .each(function() {
-                     var link = select(this);
-                     var entityID = this.textContent;
-                     var entity = context.hasEntity(entityID);
-
-                     // Add click handler
-                     link
-                       .on('mouseenter', function () {
-                         utilHighlightEntities([entityID], true, context);
-                       })
-                       .on('mouseleave', function () {
-                         utilHighlightEntities([entityID], false, context);
-                       })
-                       .on('click', function () {
-                         event.preventDefault();
+                 if (token.type === 'link') {
+                   token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+                   tokens.push(token);
+                 } else if (_lastToken2 && token.type === 'text' && _lastToken2.type === 'text') {
+                   _lastToken2.raw += token.raw;
+                   _lastToken2.text += token.text;
+                 } else {
+                   tokens.push(token);
+                 }

 
 

-                         utilHighlightEntities([entityID], false, context);
+                 continue;
+               } // em & strong

 
 

-                         var osmlayer = context.layers().layer('osm');
-                         if (!osmlayer.enabled()) {
-                           osmlayer.enabled(true);
-                         }

 
 

-                         context.map().centerZoom(d.loc, 20);
+               if (token = this.tokenizer.emStrong(src, maskedSrc, prevChar)) {
+                 src = src.substring(token.raw.length);
+                 token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
+                 tokens.push(token);
+                 continue;
+               } // code

 
 

-                         if (entity) {
-                           context.enter(modeSelect(context, [entityID]));
-                         } else {
-                           context.loadEntity(entityID, function () {
-                             context.enter(modeSelect(context, [entityID]));
-                           });
-                         }
-                       });

 
 

-                     // Replace with friendly name if possible
-                     // (The entity may not yet be loaded into the graph)
-                     if (entity) {
-                       var name = utilDisplayName(entity);  // try to use common name
+               if (token = this.tokenizer.codespan(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // br

 
 

-                       if (!name) {
-                         var preset = _mainPresetIndex.match(entity, context.graph());
-                         name = preset && !preset.isFallback() && preset.name();  // fallback to preset name
-                       }

 
 

-                       if (name) {
-                         this.innerText = name;
-                       }
-                     }
-                   });
+               if (token = this.tokenizer.br(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // del (gfm)

 
 

-               // Don't hide entities related to this issue - #5880
-               context.features().forceVisible(d.elems);
-               context.map().pan([0,0]);  // trigger a redraw
-             })
-             .catch(function (err) {
-               console.log(err); // eslint-disable-line no-console
-             });
-         }

 
 

+               if (token = this.tokenizer.del(src)) {
+                 src = src.substring(token.raw.length);
+                 token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
+                 tokens.push(token);
+                 continue;
+               } // autolink

 
 

-         osmoseDetails.issue = function(val) {
-           if (!arguments.length) { return _qaItem; }
-           _qaItem = val;
-           return osmoseDetails;
-         };

 
 

+               if (token = this.tokenizer.autolink(src, mangle)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // url (gfm)

 
 

-         return osmoseDetails;
-       }

 
 

-       function uiOsmoseHeader() {
-         var _qaItem;
+               if (!inLink && (token = this.tokenizer.url(src, mangle))) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // text

 
 

-         function issueTitle(d) {
-           var unknown = _t('inspector.unknown');

 
 

-           if (!d) { return unknown; }
+               if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
+                 src = src.substring(token.raw.length);

 
 

-           // Issue titles supplied by Osmose
-           var s = services.osmose.getStrings(d.itemType);
-           return ('title' in s) ? s.title : unknown;
-         }
+                 if (token.raw.slice(-1) !== '_') {
+                   // Track prevChar before string of ____ started
+                   prevChar = token.raw.slice(-1);
+                 }

 
 

-         function osmoseHeader(selection) {
-           var header = selection.selectAll('.qa-header')
-             .data(
-               (_qaItem ? [_qaItem] : []),
-               function (d) { return ((d.id) + "-" + (d.status || 0)); }
-             );
+                 keepPrevChar = true;
+                 lastToken = tokens[tokens.length - 1];

 
 

-           header.exit()
-             .remove();
-
-           var headerEnter = header.enter()
-             .append('div')
-               .attr('class', 'qa-header');
-
-           var svgEnter = headerEnter
-             .append('div')
-               .attr('class', 'qa-header-icon')
-               .classed('new', function (d) { return d.id < 0; })
-             .append('svg')
-               .attr('width', '20px')
-               .attr('height', '30px')
-               .attr('viewbox', '0 0 20 30')
-               .attr('class', function (d) { return ("preset-icon-28 qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-           svgEnter
-             .append('polygon')
-               .attr('fill', function (d) { return services.osmose.getColor(d.item); })
-               .attr('class', 'qaItem-fill')
-               .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-
-           svgEnter
-             .append('use')
-               .attr('class', 'icon-annotation')
-               .attr('width', '13px')
-               .attr('height', '13px')
-               .attr('transform', 'translate(3.5, 5)')
-               .attr('xlink:href', function (d) {
-                 var picon = d.icon;
-
-                 if (!picon) {
-                   return '';
+                 if (lastToken && lastToken.type === 'text') {
+                   lastToken.raw += token.raw;
+                   lastToken.text += token.text;

                  } else {
                  } else {

-                   var isMaki = /^maki-/.test(picon);
-                   return ("#" + picon + (isMaki ? '-11' : ''));
+                   tokens.push(token);

                  }
                  }

-               });

 
 

-           headerEnter
-             .append('div')
-               .attr('class', 'qa-header-label')
-               .text(issueTitle);
-         }
+                 continue;
+               }

 
 

-         osmoseHeader.issue = function(val) {
-           if (!arguments.length) { return _qaItem; }
-           _qaItem = val;
-           return osmoseHeader;
-         };
+               if (src) {
+                 var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);

 
 

-         return osmoseHeader;
-       }
+                 if (this.options.silent) {
+                   console.error(errMsg);
+                   break;
+                 } else {
+                   throw new Error(errMsg);
+                 }
+               }
+             }

 
 

-       function uiViewOnOsmose() {
-         var _qaItem;
+             return tokens;
+           }
+         }], [{
+           key: "rules",
+           get: function get() {
+             return {
+               block: block,
+               inline: inline
+             };
+           }
+           /**
+            * Static Lex Method
+            */

 
 

-         function viewOnOsmose(selection) {
-           var url;
-           if (services.osmose && (_qaItem instanceof QAItem)) {
-             url = services.osmose.itemURL(_qaItem);
+         }, {
+           key: "lex",
+           value: function lex(src, options) {
+             var lexer = new Lexer(options);
+             return lexer.lex(src);

            }
            }

+           /**
+            * Static Lex Inline Method
+            */

 
 

-           var link = selection.selectAll('.view-on-osmose')
-             .data(url ? [url] : []);
+         }, {
+           key: "lexInline",
+           value: function lexInline(src, options) {
+             var lexer = new Lexer(options);
+             return lexer.inlineTokens(src);
+           }
+         }]);

 
 

-           // exit
-           link.exit()
-             .remove();
+         return Lexer;
+       }();

 
 

-           // enter
-           var linkEnter = link.enter()
-             .append('a')
-               .attr('class', 'view-on-osmose')
-               .attr('target', '_blank')
-               .attr('rel', 'noopener') // security measure
-               .attr('href', function (d) { return d; })
-               .call(svgIcon('#iD-icon-out-link', 'inline'));
+       var defaults$2 = defaults$5.exports.defaults;
+       var cleanUrl = helpers.cleanUrl,
+           escape$2 = helpers.escape;
+       /**
+        * Renderer
+        */
+
+       var Renderer_1 = /*#__PURE__*/function () {
+         function Renderer(options) {
+           _classCallCheck$1(this, Renderer);

 
 

-           linkEnter
-             .append('span')
-               .text(_t('inspector.view_on_osmose'));
+           this.options = options || defaults$2;

          }
 
          }
 

-         viewOnOsmose.what = function(val) {
-           if (!arguments.length) { return _qaItem; }
-           _qaItem = val;
-           return viewOnOsmose;
-         };
+         _createClass$1(Renderer, [{
+           key: "code",
+           value: function code(_code, infostring, escaped) {
+             var lang = (infostring || '').match(/\S*/)[0];

 
 

-         return viewOnOsmose;
-       }
+             if (this.options.highlight) {
+               var out = this.options.highlight(_code, lang);

 
 

-       function uiOsmoseEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var qaDetails = uiOsmoseDetails(context);
-         var qaHeader = uiOsmoseHeader();
+               if (out != null && out !== _code) {
+                 escaped = true;
+                 _code = out;
+               }
+             }

 
 

-         var _qaItem;
+             _code = _code.replace(/\n$/, '') + '\n';
+
+             if (!lang) {
+               return '<pre><code>' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
+             }
+
+             return '<pre><code class="' + this.options.langPrefix + escape$2(lang, true) + '">' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
+           }
+         }, {
+           key: "blockquote",
+           value: function blockquote(quote) {
+             return '<blockquote>\n' + quote + '</blockquote>\n';
+           }
+         }, {
+           key: "html",
+           value: function html(_html) {
+             return _html;
+           }
+         }, {
+           key: "heading",
+           value: function heading(text, level, raw, slugger) {
+             if (this.options.headerIds) {
+               return '<h' + level + ' id="' + this.options.headerPrefix + slugger.slug(raw) + '">' + text + '</h' + level + '>\n';
+             } // ignore IDs
+
+
+             return '<h' + level + '>' + text + '</h' + level + '>\n';
+           }
+         }, {
+           key: "hr",
+           value: function hr() {
+             return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
+           }
+         }, {
+           key: "list",
+           value: function list(body, ordered, start) {
+             var type = ordered ? 'ol' : 'ul',
+                 startatt = ordered && start !== 1 ? ' start="' + start + '"' : '';
+             return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
+           }
+         }, {
+           key: "listitem",
+           value: function listitem(text) {
+             return '<li>' + text + '</li>\n';
+           }
+         }, {
+           key: "checkbox",
+           value: function checkbox(checked) {
+             return '<input ' + (checked ? 'checked="" ' : '') + 'disabled="" type="checkbox"' + (this.options.xhtml ? ' /' : '') + '> ';
+           }
+         }, {
+           key: "paragraph",
+           value: function paragraph(text) {
+             return '<p>' + text + '</p>\n';
+           }
+         }, {
+           key: "table",
+           value: function table(header, body) {
+             if (body) body = '<tbody>' + body + '</tbody>';
+             return '<table>\n' + '<thead>\n' + header + '</thead>\n' + body + '</table>\n';
+           }
+         }, {
+           key: "tablerow",
+           value: function tablerow(content) {
+             return '<tr>\n' + content + '</tr>\n';
+           }
+         }, {
+           key: "tablecell",
+           value: function tablecell(content, flags) {
+             var type = flags.header ? 'th' : 'td';
+             var tag = flags.align ? '<' + type + ' align="' + flags.align + '">' : '<' + type + '>';
+             return tag + content + '</' + type + '>\n';
+           } // span level renderer

 
 

-         function osmoseEditor(selection) {
+         }, {
+           key: "strong",
+           value: function strong(text) {
+             return '<strong>' + text + '</strong>';
+           }
+         }, {
+           key: "em",
+           value: function em(text) {
+             return '<em>' + text + '</em>';
+           }
+         }, {
+           key: "codespan",
+           value: function codespan(text) {
+             return '<code>' + text + '</code>';
+           }
+         }, {
+           key: "br",
+           value: function br() {
+             return this.options.xhtml ? '<br/>' : '<br>';
+           }
+         }, {
+           key: "del",
+           value: function del(text) {
+             return '<del>' + text + '</del>';
+           }
+         }, {
+           key: "link",
+           value: function link(href, title, text) {
+             href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);

 
 

-           var header = selection.selectAll('.header')
-             .data([0]);
+             if (href === null) {
+               return text;
+             }

 
 

-           var headerEnter = header.enter()
-             .append('div')
-               .attr('class', 'header fillL');
+             var out = '<a href="' + escape$2(href) + '"';

 
 

-           headerEnter
-             .append('button')
-               .attr('class', 'close')
-               .on('click', function () { return context.enter(modeBrowse(context)); })
-               .call(svgIcon('#iD-icon-close'));
+             if (title) {
+               out += ' title="' + title + '"';
+             }

 
 

-           headerEnter
-             .append('h3')
-               .text(_t('QA.osmose.title'));
+             out += '>' + text + '</a>';
+             return out;
+           }
+         }, {
+           key: "image",
+           value: function image(href, title, text) {
+             href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);

 
 

-           var body = selection.selectAll('.body')
-             .data([0]);
+             if (href === null) {
+               return text;
+             }

 
 

-           body = body.enter()
-               .append('div')
-               .attr('class', 'body')
-             .merge(body);
+             var out = '<img src="' + href + '" alt="' + text + '"';

 
 

-           var editor = body.selectAll('.qa-editor')
-             .data([0]);
+             if (title) {
+               out += ' title="' + title + '"';
+             }

 
 

-           editor.enter()
-             .append('div')
-               .attr('class', 'modal-section qa-editor')
-             .merge(editor)
-               .call(qaHeader.issue(_qaItem))
-               .call(qaDetails.issue(_qaItem))
-               .call(osmoseSaveSection);
+             out += this.options.xhtml ? '/>' : '>';
+             return out;
+           }
+         }, {
+           key: "text",
+           value: function text(_text) {
+             return _text;
+           }
+         }]);

 
 

-           var footer = selection.selectAll('.footer')
-             .data([0]);
+         return Renderer;
+       }();

 
 

-           footer.enter()
-             .append('div')
-             .attr('class', 'footer')
-             .merge(footer)
-             .call(uiViewOnOsmose().what(_qaItem));
+       var TextRenderer_1 = /*#__PURE__*/function () {
+         function TextRenderer() {
+           _classCallCheck$1(this, TextRenderer);

          }
 
          }
 

-         function osmoseSaveSection(selection) {
-           var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-           var isShown = (_qaItem && isSelected);
-           var saveSection = selection.selectAll('.qa-save')
-             .data(
-               (isShown ? [_qaItem] : []),
-               function (d) { return ((d.id) + "-" + (d.status || 0)); }
-             );
+         _createClass$1(TextRenderer, [{
+           key: "strong",
+           value: // no need for block level renderers
+           function strong(text) {
+             return text;
+           }
+         }, {
+           key: "em",
+           value: function em(text) {
+             return text;
+           }
+         }, {
+           key: "codespan",
+           value: function codespan(text) {
+             return text;
+           }
+         }, {
+           key: "del",
+           value: function del(text) {
+             return text;
+           }
+         }, {
+           key: "html",
+           value: function html(text) {
+             return text;
+           }
+         }, {
+           key: "text",
+           value: function text(_text) {
+             return _text;
+           }
+         }, {
+           key: "link",
+           value: function link(href, title, text) {
+             return '' + text;
+           }
+         }, {
+           key: "image",
+           value: function image(href, title, text) {
+             return '' + text;
+           }
+         }, {
+           key: "br",
+           value: function br() {
+             return '';
+           }
+         }]);

 
 

-           // exit
-           saveSection.exit()
-             .remove();
+         return TextRenderer;
+       }();

 
 

-           // enter
-           var saveSectionEnter = saveSection.enter()
-             .append('div')
-               .attr('class', 'qa-save save-section cf');
+       var Slugger_1 = /*#__PURE__*/function () {
+         function Slugger() {
+           _classCallCheck$1(this, Slugger);

 
 

-           // update
-           saveSection = saveSectionEnter
-             .merge(saveSection)
-               .call(qaSaveButtons);
+           this.seen = {};

          }
 
          }
 

-         function qaSaveButtons(selection) {
-           var isSelected = (_qaItem && _qaItem.id === context.selectedErrorID());
-           var buttonSection = selection.selectAll('.buttons')
-             .data((isSelected ? [_qaItem] : []), function (d) { return d.status + d.id; });
-
-           // exit
-           buttonSection.exit()
-             .remove();
-
-           // enter
-           var buttonEnter = buttonSection.enter()
-             .append('div')
-               .attr('class', 'buttons');
-
-           buttonEnter
-             .append('button')
-               .attr('class', 'button close-button action');
-
-           buttonEnter
-             .append('button')
-               .attr('class', 'button ignore-button action');
-
-           // update
-           buttonSection = buttonSection
-             .merge(buttonEnter);
-
-           buttonSection.select('.close-button')
-             .text(function () { return _t('QA.keepRight.close'); })
-             .on('click.close', function(d) {
-               this.blur();    // avoid keeping focus on the button - #4641
-               var qaService = services.osmose;
-               if (qaService) {
-                 d.newStatus = 'done';
-                 qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-               }
-             });
+         _createClass$1(Slugger, [{
+           key: "serialize",
+           value: function serialize(value) {
+             return value.toLowerCase().trim() // remove html tags
+             .replace(/<[!\/a-z].*?>/ig, '') // remove unwanted chars
+             .replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '').replace(/\s/g, '-');
+           }
+           /**
+            * Finds the next safe (unique) slug to use
+            */

 
 

-           buttonSection.select('.ignore-button')
-             .text(function () { return _t('QA.keepRight.ignore'); })
-             .on('click.ignore', function(d) {
-               this.blur();    // avoid keeping focus on the button - #4641
-               var qaService = services.osmose;
-               if (qaService) {
-                 d.newStatus = 'false';
-                 qaService.postUpdate(d, function (err, item) { return dispatch$1.call('change', item); });
-               }
-             });
-         }
+         }, {
+           key: "getNextSafeSlug",
+           value: function getNextSafeSlug(originalSlug, isDryRun) {
+             var slug = originalSlug;
+             var occurenceAccumulator = 0;

 
 

-         // NOTE: Don't change method name until UI v3 is merged
-         osmoseEditor.error = function(val) {
-           if (!arguments.length) { return _qaItem; }
-           _qaItem = val;
-           return osmoseEditor;
-         };
+             if (this.seen.hasOwnProperty(slug)) {
+               occurenceAccumulator = this.seen[originalSlug];

 
 

-         return utilRebind(osmoseEditor, dispatch$1, 'on');
-       }
+               do {
+                 occurenceAccumulator++;
+                 slug = originalSlug + '-' + occurenceAccumulator;
+               } while (this.seen.hasOwnProperty(slug));
+             }

 
 

-       // NOTE: Don't change name of this until UI v3 is merged
-       function modeSelectError(context, selectedErrorID, selectedErrorService) {
-           var mode = {
-               id: 'select-error',
-               button: 'browse'
-           };
+             if (!isDryRun) {
+               this.seen[originalSlug] = occurenceAccumulator;
+               this.seen[slug] = 0;
+             }

 
 

-           var keybinding = utilKeybinding('select-error');
-
-           var errorService = services[selectedErrorService];
-           var errorEditor;
-           switch (selectedErrorService) {
-               case 'improveOSM':
-                   errorEditor = uiImproveOsmEditor(context)
-                   .on('change', function() {
-                       context.map().pan([0,0]);  // trigger a redraw
-                       var error = checkSelectedID();
-                       if (!error) { return; }
-                       context.ui().sidebar
-                           .show(errorEditor.error(error));
-                   });
-                   break;
-               case 'keepRight':
-                   errorEditor = uiKeepRightEditor(context)
-                   .on('change', function() {
-                       context.map().pan([0,0]);  // trigger a redraw
-                       var error = checkSelectedID();
-                       if (!error) { return; }
-                       context.ui().sidebar
-                           .show(errorEditor.error(error));
-                   });
-                   break;
-               case 'osmose':
-                   errorEditor = uiOsmoseEditor(context)
-                   .on('change', function() {
-                       context.map().pan([0,0]);  // trigger a redraw
-                       var error = checkSelectedID();
-                       if (!error) { return; }
-                       context.ui().sidebar
-                           .show(errorEditor.error(error));
-                   });
-                   break;
+             return slug;

            }
            }

+           /**
+            * Convert string to unique id
+            * @param {object} options
+            * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.
+            */

 
 

+         }, {
+           key: "slug",
+           value: function slug(value) {
+             var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+             var slug = this.serialize(value);
+             return this.getNextSafeSlug(slug, options.dryrun);
+           }
+         }]);

 
 

-           var behaviors = [
-               behaviorBreathe(),
-               behaviorHover(context),
-               behaviorSelect(context),
-               behaviorLasso(context),
-               modeDragNode(context).behavior,
-               modeDragNote(context).behavior
-           ];
-
+         return Slugger;
+       }();

 
 

-           function checkSelectedID() {
-               if (!errorService) { return; }
-               var error = errorService.getError(selectedErrorID);
-               if (!error) {
-                   context.enter(modeBrowse(context));
-               }
-               return error;
-           }
+       var Renderer$1 = Renderer_1;
+       var TextRenderer$1 = TextRenderer_1;
+       var Slugger$1 = Slugger_1;
+       var defaults$1 = defaults$5.exports.defaults;
+       var unescape$1 = helpers.unescape;
+       /**
+        * Parsing & Compiling
+        */

 
 

+       var Parser_1 = /*#__PURE__*/function () {
+         function Parser(options) {
+           _classCallCheck$1(this, Parser);

 
 

-           mode.zoomToSelected = function() {
-               if (!errorService) { return; }
-               var error = errorService.getError(selectedErrorID);
-               if (error) {
-                   context.map().centerZoomEase(error.loc, 20);
-               }
-           };
+           this.options = options || defaults$1;
+           this.options.renderer = this.options.renderer || new Renderer$1();
+           this.renderer = this.options.renderer;
+           this.renderer.options = this.options;
+           this.textRenderer = new TextRenderer$1();
+           this.slugger = new Slugger$1();
+         }
+         /**
+          * Static Parse Method
+          */

 
 
 
 

-           mode.enter = function() {
-               var error = checkSelectedID();
-               if (!error) { return; }
+         _createClass$1(Parser, [{
+           key: "parse",
+           value:
+           /**
+            * Parse Loop
+            */
+           function parse(tokens) {
+             var top = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
+             var out = '',
+                 i,
+                 j,
+                 k,
+                 l2,
+                 l3,
+                 row,
+                 cell,
+                 header,
+                 body,
+                 token,
+                 ordered,
+                 start,
+                 loose,
+                 itemBody,
+                 item,
+                 checked,
+                 task,
+                 checkbox;
+             var l = tokens.length;
+
+             for (i = 0; i < l; i++) {
+               token = tokens[i];
+
+               switch (token.type) {
+                 case 'space':
+                   {
+                     continue;
+                   }

 
 

-               behaviors.forEach(context.install);
-               keybinding
-                   .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-                   .on('⎋', esc, true);
+                 case 'hr':
+                   {
+                     out += this.renderer.hr();
+                     continue;
+                   }

 
 

-               select(document)
-                   .call(keybinding);
+                 case 'heading':
+                   {
+                     out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$1(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
+                     continue;
+                   }

 
 

-               selectError();
+                 case 'code':
+                   {
+                     out += this.renderer.code(token.text, token.lang, token.escaped);
+                     continue;
+                   }

 
 

-               var sidebar = context.ui().sidebar;
-               sidebar.show(errorEditor.error(error));
+                 case 'table':
+                   {
+                     header = ''; // header

 
 

-               context.map()
-                   .on('drawn.select-error', selectError);
+                     cell = '';
+                     l2 = token.header.length;

 
 

+                     for (j = 0; j < l2; j++) {
+                       cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
+                         header: true,
+                         align: token.align[j]
+                       });
+                     }

 
 

-               // class the error as selected, or return to browse mode if the error is gone
-               function selectError(drawn) {
-                   if (!checkSelectedID()) { return; }
+                     header += this.renderer.tablerow(cell);
+                     body = '';
+                     l2 = token.cells.length;

 
 

-                   var selection = context.surface()
-                       .selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
+                     for (j = 0; j < l2; j++) {
+                       row = token.tokens.cells[j];
+                       cell = '';
+                       l3 = row.length;

 
 

-                   if (selection.empty()) {
-                       // Return to browse mode if selected DOM elements have
-                       // disappeared because the user moved them out of view..
-                       var source = event && event.type === 'zoom' && event.sourceEvent;
-                       if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-                           context.enter(modeBrowse(context));
+                       for (k = 0; k < l3; k++) {
+                         cell += this.renderer.tablecell(this.parseInline(row[k]), {
+                           header: false,
+                           align: token.align[k]
+                         });

                        }
 
                        }
 

-                   } else {
-                       selection
-                           .classed('selected', true);
+                       body += this.renderer.tablerow(cell);
+                     }

 
 

-                       context.selectedErrorID(selectedErrorID);
+                     out += this.renderer.table(header, body);
+                     continue;

                    }
                    }

-               }

 
 

-               function esc() {
-                   if (context.container().select('.combobox').size()) { return; }
-                   context.enter(modeBrowse(context));
-               }
-           };
+                 case 'blockquote':
+                   {
+                     body = this.parse(token.tokens);
+                     out += this.renderer.blockquote(body);
+                     continue;
+                   }

 
 

+                 case 'list':
+                   {
+                     ordered = token.ordered;
+                     start = token.start;
+                     loose = token.loose;
+                     l2 = token.items.length;
+                     body = '';
+
+                     for (j = 0; j < l2; j++) {
+                       item = token.items[j];
+                       checked = item.checked;
+                       task = item.task;
+                       itemBody = '';
+
+                       if (item.task) {
+                         checkbox = this.renderer.checkbox(checked);
+
+                         if (loose) {
+                           if (item.tokens.length > 0 && item.tokens[0].type === 'text') {
+                             item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
+
+                             if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
+                               item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
+                             }
+                           } else {
+                             item.tokens.unshift({
+                               type: 'text',
+                               text: checkbox
+                             });
+                           }
+                         } else {
+                           itemBody += checkbox;
+                         }
+                       }

 
 

-           mode.exit = function() {
-               behaviors.forEach(context.uninstall);
+                       itemBody += this.parse(item.tokens, loose);
+                       body += this.renderer.listitem(itemBody, task, checked);
+                     }

 
 

-               select(document)
-                   .call(keybinding.unbind);
+                     out += this.renderer.list(body, ordered, start);
+                     continue;
+                   }

 
 

-               context.surface()
-                   .selectAll('.qaItem.selected')
-                   .classed('selected hover', false);
+                 case 'html':
+                   {
+                     // TODO parse inline content if parameter markdown=1
+                     out += this.renderer.html(token.text);
+                     continue;
+                   }

 
 

-               context.map()
-                   .on('drawn.select-error', null);
+                 case 'paragraph':
+                   {
+                     out += this.renderer.paragraph(this.parseInline(token.tokens));
+                     continue;
+                   }

 
 

-               context.ui().sidebar
-                   .hide();
+                 case 'text':
+                   {
+                     body = token.tokens ? this.parseInline(token.tokens) : token.text;

 
 

-               context.selectedErrorID(null);
-               context.features().forceVisible([]);
-           };
+                     while (i + 1 < l && tokens[i + 1].type === 'text') {
+                       token = tokens[++i];
+                       body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
+                     }

 
 

+                     out += top ? this.renderer.paragraph(body) : body;
+                     continue;
+                   }

 
 

-           return mode;
-       }
+                 default:
+                   {
+                     var errMsg = 'Token with "' + token.type + '" type was not found.';

 
 

-       function behaviorSelect(context) {
-           var _tolerancePx = 4; // see also behaviorDrag
-           var _lastMouseEvent = null;
-           var _showMenu = false;
-           var _downPointers = {};
-           var _longPressTimeout = null;
-           var _lastInteractionType = null;
-           // the id of the down pointer that's enabling multiselection while down
-           var _multiselectionPointerId = null;
+                     if (this.options.silent) {
+                       console.error(errMsg);
+                       return;
+                     } else {
+                       throw new Error(errMsg);
+                     }
+                   }
+               }
+             }

 
 

-           // use pointer events on supported platforms; fallback to mouse events
-           var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+             return out;
+           }
+           /**
+            * Parse Inline Tokens
+            */

 
 

+         }, {
+           key: "parseInline",
+           value: function parseInline(tokens, renderer) {
+             renderer = renderer || this.renderer;
+             var out = '',
+                 i,
+                 token;
+             var l = tokens.length;
+
+             for (i = 0; i < l; i++) {
+               token = tokens[i];
+
+               switch (token.type) {
+                 case 'escape':
+                   {
+                     out += renderer.text(token.text);
+                     break;
+                   }

 
 

-           function keydown() {
+                 case 'html':
+                   {
+                     out += renderer.html(token.text);
+                     break;
+                   }

 
 

-               if (event.keyCode === 32) {
-                   // don't react to spacebar events during text input
-                   var activeNode = document.activeElement;
-                   if (activeNode && new Set(['INPUT', 'TEXTAREA']).has(activeNode.nodeName)) { return; }
-               }
+                 case 'link':
+                   {
+                     out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
+                     break;
+                   }

 
 

-               if (event.keyCode === 93 ||  // context menu key
-                   event.keyCode === 32) {  // spacebar
-                   event.preventDefault();
-               }
+                 case 'image':
+                   {
+                     out += renderer.image(token.href, token.title, token.text);
+                     break;
+                   }

 
 

-               if (event.repeat) { return; } // ignore repeated events for held keys
+                 case 'strong':
+                   {
+                     out += renderer.strong(this.parseInline(token.tokens, renderer));
+                     break;
+                   }

 
 

-               // if any key is pressed the user is probably doing something other than long-pressing
-               cancelLongPress();
+                 case 'em':
+                   {
+                     out += renderer.em(this.parseInline(token.tokens, renderer));
+                     break;
+                   }

 
 

-               if (event.shiftKey) {
-                   context.surface()
-                       .classed('behavior-multiselect', true);
-               }
+                 case 'codespan':
+                   {
+                     out += renderer.codespan(token.text);
+                     break;
+                   }

 
 

-               if (event.keyCode === 32) {  // spacebar
-                   if (!_downPointers.spacebar && _lastMouseEvent) {
-                       cancelLongPress();
-                       _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
+                 case 'br':
+                   {
+                     out += renderer.br();
+                     break;
+                   }

 
 

-                       _downPointers.spacebar = {
-                           firstEvent: _lastMouseEvent,
-                           lastEvent: _lastMouseEvent
-                       };
+                 case 'del':
+                   {
+                     out += renderer.del(this.parseInline(token.tokens, renderer));
+                     break;

                    }
                    }

-               }
-           }

 
 

+                 case 'text':
+                   {
+                     out += renderer.text(token.text);
+                     break;
+                   }

 
 

-           function keyup() {
-               cancelLongPress();
+                 default:
+                   {
+                     var errMsg = 'Token with "' + token.type + '" type was not found.';

 
 

-               if (!event.shiftKey) {
-                   context.surface()
-                       .classed('behavior-multiselect', false);
+                     if (this.options.silent) {
+                       console.error(errMsg);
+                       return;
+                     } else {
+                       throw new Error(errMsg);
+                     }
+                   }

                }
                }

+             }

 
 

-               if (event.keyCode === 93) {  // context menu key
-                   event.preventDefault();
-                   _lastInteractionType = 'menukey';
-                   contextmenu();
-               } else if (event.keyCode === 32) {  // spacebar
-                   var pointer = _downPointers.spacebar;
-                   if (pointer) {
-                       delete _downPointers.spacebar;
-
-                       if (pointer.done) { return; }
+             return out;
+           }
+         }], [{
+           key: "parse",
+           value: function parse(tokens, options) {
+             var parser = new Parser(options);
+             return parser.parse(tokens);
+           }
+           /**
+            * Static Parse Inline Method
+            */

 
 

-                       event.preventDefault();
-                       _lastInteractionType = 'spacebar';
-                       click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
-                   }
-               }
+         }, {
+           key: "parseInline",
+           value: function parseInline(tokens, options) {
+             var parser = new Parser(options);
+             return parser.parseInline(tokens);

            }
            }

+         }]);

 
 

+         return Parser;
+       }();
+
+       var Lexer = Lexer_1;
+       var Parser = Parser_1;
+       var Tokenizer = Tokenizer_1;
+       var Renderer = Renderer_1;
+       var TextRenderer = TextRenderer_1;
+       var Slugger = Slugger_1;
+       var merge = helpers.merge,
+           checkSanitizeDeprecation = helpers.checkSanitizeDeprecation,
+           escape$1 = helpers.escape;
+       var getDefaults = defaults$5.exports.getDefaults,
+           changeDefaults = defaults$5.exports.changeDefaults,
+           defaults = defaults$5.exports.defaults;
+       /**
+        * Marked
+        */

 
 

-           function pointerdown() {
-               var id = (event.pointerId || 'mouse').toString();
+       function marked(src, opt, callback) {
+         // throw error in case of non string input
+         if (typeof src === 'undefined' || src === null) {
+           throw new Error('marked(): input parameter is undefined or null');
+         }

 
 

-               cancelLongPress();
+         if (typeof src !== 'string') {
+           throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+         }

 
 

-               if (event.buttons && event.buttons !== 1) { return; }
+         if (typeof opt === 'function') {
+           callback = opt;
+           opt = null;
+         }

 
 

-               context.ui().closeEditMenu();
+         opt = merge({}, marked.defaults, opt || {});
+         checkSanitizeDeprecation(opt);

 
 

-               _longPressTimeout = window.setTimeout(didLongPress, 500, id, 'longdown-' + (event.pointerType || 'mouse'));
+         if (callback) {
+           var highlight = opt.highlight;
+           var tokens;

 
 

-               _downPointers[id] = {
-                   firstEvent: event,
-                   lastEvent: event
-               };
+           try {
+             tokens = Lexer.lex(src, opt);
+           } catch (e) {
+             return callback(e);

            }
 
            }
 

+           var done = function done(err) {
+             var out;

 
 

-           function didLongPress(id, interactionType) {
-               var pointer = _downPointers[id];
-               if (!pointer) { return; }
+             if (!err) {
+               try {
+                 if (opt.walkTokens) {
+                   marked.walkTokens(tokens, opt.walkTokens);
+                 }

 
 

-               for (var i in _downPointers) {
-                   // don't allow this or any currently down pointer to trigger another click
-                   _downPointers[i].done = true;
+                 out = Parser.parse(tokens, opt);
+               } catch (e) {
+                 err = e;

                }
                }

+             }

 
 

-               // treat long presses like right-clicks
-               _longPressTimeout = null;
-               _lastInteractionType = interactionType;
-               _showMenu = true;
+             opt.highlight = highlight;
+             return err ? callback(err) : callback(null, out);
+           };

 
 

-               click(pointer.firstEvent, pointer.lastEvent, id);
+           if (!highlight || highlight.length < 3) {
+             return done();

            }
 
            }
 

+           delete opt.highlight;
+           if (!tokens.length) return done();
+           var pending = 0;
+           marked.walkTokens(tokens, function (token) {
+             if (token.type === 'code') {
+               pending++;
+               setTimeout(function () {
+                 highlight(token.text, token.lang, function (err, code) {
+                   if (err) {
+                     return done(err);
+                   }

 
 

-           function pointermove() {
-               var id = (event.pointerId || 'mouse').toString();
-               if (_downPointers[id]) {
-                   _downPointers[id].lastEvent = event;
-               }
-               if (!event.pointerType || event.pointerType === 'mouse') {
-                   _lastMouseEvent = event;
-                   if (_downPointers.spacebar) {
-                       _downPointers.spacebar.lastEvent = event;
+                   if (code != null && code !== token.text) {
+                     token.text = code;
+                     token.escaped = true;

                    }
                    }

-               }
-           }

 
 

+                   pending--;

 
 

-           function pointerup() {
-               var id = (event.pointerId || 'mouse').toString();
-               var pointer = _downPointers[id];
-               if (!pointer) { return; }
+                   if (pending === 0) {
+                     done();
+                   }
+                 });
+               }, 0);
+             }
+           });

 
 

-               delete _downPointers[id];
+           if (pending === 0) {
+             done();
+           }

 
 

-               if (_multiselectionPointerId === id) {
-                   _multiselectionPointerId = null;
-               }
+           return;
+         }

 
 

-               if (pointer.done) { return; }
+         try {
+           var _tokens = Lexer.lex(src, opt);

 
 

-               click(pointer.firstEvent, event, id);
+           if (opt.walkTokens) {
+             marked.walkTokens(_tokens, opt.walkTokens);

            }
 
            }
 

+           return Parser.parse(_tokens, opt);
+         } catch (e) {
+           e.message += '\nPlease report this to https://github.com/markedjs/marked.';

 
 

-           function pointercancel() {
-               var id = (event.pointerId || 'mouse').toString();
-               if (!_downPointers[id]) { return; }
+           if (opt.silent) {
+             return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
+           }

 
 

-               delete _downPointers[id];
+           throw e;
+         }
+       }
+       /**
+        * Options
+        */

 
 

-               if (_multiselectionPointerId === id) {
-                   _multiselectionPointerId = null;
-               }
-           }

 
 

+       marked.options = marked.setOptions = function (opt) {
+         merge(marked.defaults, opt);
+         changeDefaults(marked.defaults);
+         return marked;
+       };

 
 

-           function contextmenu() {
-               var e = event;
-               e.preventDefault();
+       marked.getDefaults = getDefaults;
+       marked.defaults = defaults;
+       /**
+        * Use Extension
+        */

 
 

-               if (!+e.clientX && !+e.clientY) {
-                   if (_lastMouseEvent) {
-                       e.sourceEvent = _lastMouseEvent;
-                   } else {
-                       return;
-                   }
-               } else {
-                   _lastMouseEvent = event;
-                   _lastInteractionType = 'rightclick';
-               }
+       marked.use = function (extension) {
+         var opts = merge({}, extension);

 
 

-               _showMenu = true;
-               click(event, event);
-           }
+         if (extension.renderer) {
+           (function () {
+             var renderer = marked.defaults.renderer || new Renderer();

 
 

+             var _loop = function _loop(prop) {
+               var prevRenderer = renderer[prop];

 
 

-           function click(firstEvent, lastEvent, pointerId) {
-               cancelLongPress();
+               renderer[prop] = function () {
+                 for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+                   args[_key] = arguments[_key];
+                 }

 
 

-               var mapNode = context.container().select('.main-map').node();
+                 var ret = extension.renderer[prop].apply(renderer, args);

 
 

-               // Use the `main-map` coordinate system since the surface and supersurface
-               // are transformed when drag-panning.
-               var pointGetter = utilFastMouse(mapNode);
-               var p1 = pointGetter(firstEvent);
-               var p2 = pointGetter(lastEvent);
-               var dist = geoVecLength(p1, p2);
+                 if (ret === false) {
+                   ret = prevRenderer.apply(renderer, args);
+                 }

 
 

-               if (dist > _tolerancePx ||
-                   !mapContains(lastEvent)) {
+                 return ret;
+               };
+             };

 
 

-                   resetProperties();
-                   return;
-               }
+             for (var prop in extension.renderer) {
+               _loop(prop);
+             }

 
 

-               var targetDatum = lastEvent.target.__data__;
+             opts.renderer = renderer;
+           })();
+         }

 
 

-               var multiselectEntityId;
+         if (extension.tokenizer) {
+           (function () {
+             var tokenizer = marked.defaults.tokenizer || new Tokenizer();

 
 

-               if (!_multiselectionPointerId) {
-                   // If a different pointer than the one triggering this click is down on a
-                   // feature, treat this and all future clicks as multiselection until that
-                   // pointer is raised.
-                   var selectPointerInfo = pointerDownOnSelection(pointerId);
-                   if (selectPointerInfo) {
-                       _multiselectionPointerId = selectPointerInfo.pointerId;
-                       // if the other feature isn't selected yet, make sure we select it
-                       multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
-                       _downPointers[selectPointerInfo.pointerId].done = true;
-                   }
-               }
+             var _loop2 = function _loop2(prop) {
+               var prevTokenizer = tokenizer[prop];

 
 

-               // support multiselect if data is already selected
-               var isMultiselect = context.mode().id === 'select' && (
-                   // and shift key is down
-                   (event && event.shiftKey) ||
-                   // or we're lasso-selecting
-                   context.surface().select('.lasso').node() ||
-                   // or a pointer is down over a selected feature
-                   (_multiselectionPointerId && !multiselectEntityId)
-               );
+               tokenizer[prop] = function () {
+                 for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+                   args[_key2] = arguments[_key2];
+                 }

 
 

-               processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
+                 var ret = extension.tokenizer[prop].apply(tokenizer, args);

 
 

-               function mapContains(event) {
-                   var rect = mapNode.getBoundingClientRect();
-                   return event.clientX >= rect.left &&
-                       event.clientX <= rect.right &&
-                       event.clientY >= rect.top &&
-                       event.clientY <= rect.bottom;
-               }
+                 if (ret === false) {
+                   ret = prevTokenizer.apply(tokenizer, args);
+                 }

 
 

-               function pointerDownOnSelection(skipPointerId) {
-                   var mode = context.mode();
-                   var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
-                   for (var pointerId in _downPointers) {
-                       if (pointerId === 'spacebar' || pointerId === skipPointerId) { continue; }
+                 return ret;
+               };
+             };

 
 

-                       var pointerInfo = _downPointers[pointerId];
+             for (var prop in extension.tokenizer) {
+               _loop2(prop);
+             }

 
 

-                       var p1 = pointGetter(pointerInfo.firstEvent);
-                       var p2 = pointGetter(pointerInfo.lastEvent);
-                       if (geoVecLength(p1, p2) > _tolerancePx) { continue; }
+             opts.tokenizer = tokenizer;
+           })();
+         }

 
 

-                       var datum = pointerInfo.firstEvent.target.__data__;
-                       var entity = (datum && datum.properties && datum.properties.entity) || datum;
-                       if (context.graph().hasEntity(entity.id)) { return {
-                           pointerId: pointerId,
-                           entityId: entity.id,
-                           selected: selectedIDs.indexOf(entity.id) !== -1
-                       }; }
-                   }
-                   return null;
-               }
-           }
+         if (extension.walkTokens) {
+           var walkTokens = marked.defaults.walkTokens;

 
 

+           opts.walkTokens = function (token) {
+             extension.walkTokens(token);

 
 

-           function processClick(datum, isMultiselect, point, alsoSelectId) {
-               var mode = context.mode();
-               var showMenu = _showMenu;
-               var interactionType = _lastInteractionType;
+             if (walkTokens) {
+               walkTokens(token);
+             }
+           };
+         }
+
+         marked.setOptions(opts);
+       };
+       /**
+        * Run callback for every token
+        */

 
 

-               var entity = datum && datum.properties && datum.properties.entity;
-               if (entity) { datum = entity; }

 
 

-               if (datum && datum.type === 'midpoint') {
-                   // treat targeting midpoints as if targeting the parent way
-                   datum = datum.parents[0];
-               }
+       marked.walkTokens = function (tokens, callback) {
+         var _iterator = _createForOfIteratorHelper(tokens),
+             _step;

 
 

-               var newMode;
+         try {
+           for (_iterator.s(); !(_step = _iterator.n()).done;) {
+             var token = _step.value;
+             callback(token);

 
 

-               if (datum instanceof osmEntity) {
-                   // targeting an entity
-                   var selectedIDs = context.selectedIDs();
-                   context.selectedNoteID(null);
-                   context.selectedErrorID(null);
-
-                   if (!isMultiselect) {
-                       // don't change the selection if we're toggling the menu atop a multiselection
-                       if (!showMenu ||
-                           selectedIDs.length <= 1 ||
-                           selectedIDs.indexOf(datum.id) === -1) {
-
-                           if (alsoSelectId === datum.id) { alsoSelectId = null; }
-
-                           selectedIDs = (alsoSelectId ? [alsoSelectId] : []).concat([datum.id]);
-                           // always enter modeSelect even if the entity is already
-                           // selected since listeners may expect `context.enter` events,
-                           // e.g. in the walkthrough
-                           newMode = mode.id === 'select' ? mode.selectedIDs(selectedIDs) : modeSelect(context, selectedIDs).selectBehavior(behavior);
-                           context.enter(newMode);
-                       }
+             switch (token.type) {
+               case 'table':
+                 {
+                   var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
+                       _step2;

 
 

-                   } else {
-                       if (selectedIDs.indexOf(datum.id) !== -1) {
-                           // clicked entity is already in the selectedIDs list..
-                           if (!showMenu) {
-                               // deselect clicked entity, then reenter select mode or return to browse mode..
-                               selectedIDs = selectedIDs.filter(function(id) { return id !== datum.id; });
-                               newMode = selectedIDs.length ? mode.selectedIDs(selectedIDs) : modeBrowse(context).selectBehavior(behavior);
-                               context.enter(newMode);
-                           }
-                       } else {
-                           // clicked entity is not in the selected list, add it..
-                           selectedIDs = selectedIDs.concat([datum.id]);
-                           newMode = mode.selectedIDs(selectedIDs);
-                           context.enter(newMode);
-                       }
+                   try {
+                     for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+                       var cell = _step2.value;
+                       marked.walkTokens(cell, callback);
+                     }
+                   } catch (err) {
+                     _iterator2.e(err);
+                   } finally {
+                     _iterator2.f();

                    }
 
                    }
 

-               } else if (datum && datum.__featurehash__ && !isMultiselect) {
-                   // targeting custom data
-                   context
-                       .selectedNoteID(null)
-                       .enter(modeSelectData(context, datum));
+                   var _iterator3 = _createForOfIteratorHelper(token.tokens.cells),
+                       _step3;

 
 

-               } else if (datum instanceof osmNote && !isMultiselect) {
-                   // targeting a note
-                   context
-                       .selectedNoteID(datum.id)
-                       .enter(modeSelectNote(context, datum.id));
+                   try {
+                     for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
+                       var row = _step3.value;

 
 

-               } else if (datum instanceof QAItem & !isMultiselect) {
-                   // targeting an external QA issue
-                   context
-                       .selectedErrorID(datum.id)
-                       .enter(modeSelectError(context, datum.id, datum.service));
+                       var _iterator4 = _createForOfIteratorHelper(row),
+                           _step4;

 
 

-               } else {
-                   // targeting nothing
-                   context.selectedNoteID(null);
-                   context.selectedErrorID(null);
-                   if (!isMultiselect && mode.id !== 'browse') {
-                       context.enter(modeBrowse(context));
+                       try {
+                         for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
+                           var _cell = _step4.value;
+                           marked.walkTokens(_cell, callback);
+                         }
+                       } catch (err) {
+                         _iterator4.e(err);
+                       } finally {
+                         _iterator4.f();
+                       }
+                     }
+                   } catch (err) {
+                     _iterator3.e(err);
+                   } finally {
+                     _iterator3.f();

                    }
                    }

-               }

 
 

-               context.ui().closeEditMenu();
+                   break;
+                 }

 
 

-               // always request to show the edit menu in case the mode needs it
-               if (showMenu) { context.ui().showEditMenu(point, interactionType); }
+               case 'list':
+                 {
+                   marked.walkTokens(token.items, callback);
+                   break;
+                 }

 
 

-               resetProperties();
+               default:
+                 {
+                   if (token.tokens) {
+                     marked.walkTokens(token.tokens, callback);
+                   }
+                 }
+             }

            }
            }

+         } catch (err) {
+           _iterator.e(err);
+         } finally {
+           _iterator.f();
+         }
+       };
+       /**
+        * Parse Inline
+        */

 
 
 
 

-           function cancelLongPress() {
-               if (_longPressTimeout) { window.clearTimeout(_longPressTimeout); }
-               _longPressTimeout = null;
-           }
+       marked.parseInline = function (src, opt) {
+         // throw error in case of non string input
+         if (typeof src === 'undefined' || src === null) {
+           throw new Error('marked.parseInline(): input parameter is undefined or null');
+         }

 
 

+         if (typeof src !== 'string') {
+           throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+         }

 
 

-           function resetProperties() {
-               cancelLongPress();
-               _showMenu = false;
-               _lastInteractionType = null;
-               // don't reset _lastMouseEvent since it might still be useful
-           }
-
-
-           function behavior(selection) {
-               resetProperties();
-               _lastMouseEvent = context.map().lastPointerEvent();
-
-               select(window)
-                   .on('keydown.select', keydown)
-                   .on('keyup.select', keyup)
-                   .on(_pointerPrefix + 'move.select', pointermove, true)
-                   .on(_pointerPrefix + 'up.select', pointerup, true)
-                   .on('pointercancel.select', pointercancel, true)
-                   .on('contextmenu.select-window', function() {
-                       // Edge and IE really like to show the contextmenu on the
-                       // menubar when user presses a keyboard menu button
-                       // even after we've already preventdefaulted the key event.
-                       var e = event;
-                       if (+e.clientX === 0 && +e.clientY === 0) {
-                           event.preventDefault();
-                       }
-                   });
+         opt = merge({}, marked.defaults, opt || {});
+         checkSanitizeDeprecation(opt);

 
 

-               selection
-                   .on(_pointerPrefix + 'down.select', pointerdown)
-                   .on('contextmenu.select', contextmenu);
+         try {
+           var tokens = Lexer.lexInline(src, opt);

 
 

-               if (event && event.shiftKey) {
-                   context.surface()
-                       .classed('behavior-multiselect', true);
-               }
+           if (opt.walkTokens) {
+             marked.walkTokens(tokens, opt.walkTokens);

            }
 
            }
 

+           return Parser.parseInline(tokens, opt);
+         } catch (e) {
+           e.message += '\nPlease report this to https://github.com/markedjs/marked.';

 
 

-           behavior.off = function(selection) {
-               cancelLongPress();
+           if (opt.silent) {
+             return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
+           }

 
 

-               select(window)
-                   .on('keydown.select', null)
-                   .on('keyup.select', null)
-                   .on('contextmenu.select-window', null)
-                   .on(_pointerPrefix + 'move.select', null, true)
-                   .on(_pointerPrefix + 'up.select', null, true)
-                   .on('pointercancel.select', null, true);
+           throw e;
+         }
+       };
+       /**
+        * Expose
+        */

 
 

-               selection
-                   .on(_pointerPrefix + 'down.select', null)
-                   .on('contextmenu.select', null);

 
 

-               context.surface()
-                   .classed('behavior-multiselect', false);
-           };
+       marked.Parser = Parser;
+       marked.parser = Parser.parse;
+       marked.Renderer = Renderer;
+       marked.TextRenderer = TextRenderer;
+       marked.Lexer = Lexer;
+       marked.lexer = Lexer.lex;
+       marked.Tokenizer = Tokenizer;
+       marked.Slugger = Slugger;
+       marked.parse = marked;
+       var marked_1 = marked;

 
 

+       var tiler$4 = utilTiler();
+       var dispatch$5 = dispatch$8('loaded');
+       var _tileZoom$1 = 14;
+       var _osmoseUrlRoot = 'https://osmose.openstreetmap.fr/api/0.3';
+       var _osmoseData = {
+         icons: {},
+         items: []
+       }; // This gets reassigned if reset

 
 

-           return behavior;
+       var _cache;
+
+       function abortRequest$4(controller) {
+         if (controller) {
+           controller.abort();
+         }

        }
 
        }
 

-       function behaviorDrawWay(context, wayID, mode, startGraph) {
+       function abortUnwantedRequests$1(cache, tiles) {
+         Object.keys(cache.inflightTile).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k === tile.id;
+           });
+
+           if (!wanted) {
+             abortRequest$4(cache.inflightTile[k]);
+             delete cache.inflightTile[k];
+           }
+         });
+       }

 
 

-           var dispatch$1 = dispatch('rejectedSelfIntersection');
+       function encodeIssueRtree(d) {
+         return {
+           minX: d.loc[0],
+           minY: d.loc[1],
+           maxX: d.loc[0],
+           maxY: d.loc[1],
+           data: d
+         };
+       } // Replace or remove QAItem from rtree

 
 

-           var behavior = behaviorDraw(context);

 
 

-           // Must be set by `drawWay.nodeIndex` before each install of this behavior.
-           var _nodeIndex;
+       function updateRtree$1(item, replace) {
+         _cache.rtree.remove(item, function (a, b) {
+           return a.data.id === b.data.id;
+         });

 
 

-           var _origWay;
-           var _wayGeometry;
-           var _headNodeID;
-           var _annotation;
+         if (replace) {
+           _cache.rtree.insert(item);
+         }
+       } // Issues shouldn't obscure each other

 
 

-           var _pointerHasMoved = false;

 
 

-           // The osmNode to be placed.
-           // This is temporary and just follows the mouse cursor until an "add" event occurs.
-           var _drawNode;
+       function preventCoincident(loc) {
+         var coincident = false;

 
 

-           var _didResolveTempEdit = false;
+         do {
+           // first time, move marker up. after that, move marker right.
+           var delta = coincident ? [0.00001, 0] : [0, 0.00001];
+           loc = geoVecAdd(loc, delta);
+           var bbox = geoExtent(loc).bbox();
+           coincident = _cache.rtree.search(bbox).length;
+         } while (coincident);

 
 

-           function createDrawNode(loc) {
-               // don't make the draw node until we actually need it
-               _drawNode = osmNode({ loc: loc });
+         return loc;
+       }

 
 

-               context.pauseChangeDispatch();
-               context.replace(function actionAddDrawNode(graph) {
-                   // add the draw node to the graph and insert it into the way
-                   var way = graph.entity(wayID);
-                   return graph
-                       .replace(_drawNode)
-                       .replace(way.addNode(_drawNode.id, _nodeIndex));
-               }, _annotation);
-               context.resumeChangeDispatch();
+       var serviceOsmose = {
+         title: 'osmose',
+         init: function init() {
+           _mainFileFetcher.get('qa_data').then(function (d) {
+             _osmoseData = d.osmose;
+             _osmoseData.items = Object.keys(d.osmose.icons).map(function (s) {
+               return s.split('-')[0];
+             }).reduce(function (unique, item) {
+               return unique.indexOf(item) !== -1 ? unique : [].concat(_toConsumableArray(unique), [item]);
+             }, []);
+           });

 
 

-               setActiveElements();
+           if (!_cache) {
+             this.reset();

            }
 
            }
 

-           function removeDrawNode() {
+           this.event = utilRebind(this, dispatch$5, 'on');
+         },
+         reset: function reset() {
+           var _strings = {};
+           var _colors = {};
+
+           if (_cache) {
+             Object.values(_cache.inflightTile).forEach(abortRequest$4); // Strings and colors are static and should not be re-populated

 
 

-               context.pauseChangeDispatch();
-               context.replace(
-                   function actionDeleteDrawNode(graph) {
-                      var way = graph.entity(wayID);
-                      return graph
-                          .replace(way.removeNode(_drawNode.id))
-                          .remove(_drawNode);
-                  },
-                   _annotation
-               );
-               _drawNode = undefined;
-               context.resumeChangeDispatch();
+             _strings = _cache.strings;
+             _colors = _cache.colors;

            }
 
            }
 

+           _cache = {
+             data: {},
+             loadedTile: {},
+             inflightTile: {},
+             inflightPost: {},
+             closed: {},
+             rtree: new RBush(),
+             strings: _strings,
+             colors: _colors
+           };
+         },
+         loadIssues: function loadIssues(projection) {
+           var _this = this;
+
+           var params = {
+             // Tiles return a maximum # of issues
+             // So we want to filter our request for only types iD supports
+             item: _osmoseData.items
+           }; // determine the needed tiles to cover the view

 
 

-           function keydown() {
-               if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-                   if (context.surface().classed('nope')) {
-                       context.surface()
-                           .classed('nope-suppressed', true);
-                   }
-                   context.surface()
-                       .classed('nope', false)
-                       .classed('nope-disabled', true);
-               }
-           }
+           var tiles = tiler$4.zoomExtent([_tileZoom$1, _tileZoom$1]).getTiles(projection); // abort inflight requests that are no longer needed
+
+           abortUnwantedRequests$1(_cache, tiles); // issue new requests..

 
 

+           tiles.forEach(function (tile) {
+             if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) return;
+
+             var _tile$xyz = _slicedToArray(tile.xyz, 3),
+                 x = _tile$xyz[0],
+                 y = _tile$xyz[1],
+                 z = _tile$xyz[2];
+
+             var url = "".concat(_osmoseUrlRoot, "/issues/").concat(z, "/").concat(x, "/").concat(y, ".json?") + utilQsString(params);
+             var controller = new AbortController();
+             _cache.inflightTile[tile.id] = controller;
+             d3_json(url, {
+               signal: controller.signal
+             }).then(function (data) {
+               delete _cache.inflightTile[tile.id];
+               _cache.loadedTile[tile.id] = true;
+
+               if (data.features) {
+                 data.features.forEach(function (issue) {
+                   var _issue$properties = issue.properties,
+                       item = _issue$properties.item,
+                       cl = _issue$properties["class"],
+                       id = _issue$properties.uuid;
+                   /* Osmose issues are uniquely identified by a unique
+                     `item` and `class` combination (both integer values) */
+
+                   var itemType = "".concat(item, "-").concat(cl); // Filter out unsupported issue types (some are too specific or advanced)
+
+                   if (itemType in _osmoseData.icons) {
+                     var loc = issue.geometry.coordinates; // lon, lat
+
+                     loc = preventCoincident(loc);
+                     var d = new QAItem(loc, _this, itemType, id, {
+                       item: item
+                     }); // Setting elems here prevents UI detail requests
+
+                     if (item === 8300 || item === 8360) {
+                       d.elems = [];
+                     }

 
 

-           function keyup() {
-               if (event.keyCode === utilKeybinding.modifierCodes.alt) {
-                   if (context.surface().classed('nope-suppressed')) {
-                       context.surface()
-                           .classed('nope', true);
+                     _cache.data[d.id] = d;
+
+                     _cache.rtree.insert(encodeIssueRtree(d));

                    }
                    }

-                   context.surface()
-                       .classed('nope-suppressed', false)
-                       .classed('nope-disabled', false);
+                 });

                }
                }

-           }

 
 

+               dispatch$5.call('loaded');
+             })["catch"](function () {
+               delete _cache.inflightTile[tile.id];
+               _cache.loadedTile[tile.id] = true;
+             });
+           });
+         },
+         loadIssueDetail: function loadIssueDetail(issue) {
+           var _this2 = this;

 
 

-           function allowsVertex(d) {
-               return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+           // Issue details only need to be fetched once
+           if (issue.elems !== undefined) {
+             return Promise.resolve(issue);

            }
 
            }
 

+           var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "?langs=").concat(_mainLocalizer.localeCode());

 
 

-           // related code
-           // - `mode/drag_node.js`     `doMove()`
-           // - `behavior/draw.js`      `click()`
-           // - `behavior/draw_way.js`  `move()`
-           function move(datum) {
-
-               var loc = context.map().mouseCoordinates();
-
-               if (!_drawNode) { createDrawNode(loc); }
+           var cacheDetails = function cacheDetails(data) {
+             // Associated elements used for highlighting
+             // Assign directly for immediate use in the callback
+             issue.elems = data.elems.map(function (e) {
+               return e.type.substring(0, 1) + e.id;
+             }); // Some issues have instance specific detail in a subtitle

 
 

-               context.surface().classed('nope-disabled', event.altKey);
+             issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';

 
 

-               var targetLoc = datum && datum.properties && datum.properties.entity &&
-                   allowsVertex(datum.properties.entity) && datum.properties.entity.loc;
-               var targetNodes = datum && datum.properties && datum.properties.nodes;
+             _this2.replaceItem(issue);
+           };

 
 

-               if (targetLoc) {   // snap to node/vertex - a point target with `.loc`
-                   loc = targetLoc;
+           return d3_json(url).then(cacheDetails).then(function () {
+             return issue;
+           });
+         },
+         loadStrings: function loadStrings() {
+           var locale = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : _mainLocalizer.localeCode();
+           var items = Object.keys(_osmoseData.icons);

 
 

-               } else if (targetNodes) {   // snap to way - a line target with `.nodes`
-                   var choice = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, _drawNode.id);
-                   if (choice) {
-                       loc = choice.loc;
-                   }
-               }
+           if (locale in _cache.strings && Object.keys(_cache.strings[locale]).length === items.length) {
+             return Promise.resolve(_cache.strings[locale]);
+           } // May be partially populated already if some requests were successful

 
 

-               context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
-               _drawNode = context.entity(_drawNode.id);
-               checkGeometry(true /* includeDrawNode */);
-           }

 
 

+           if (!(locale in _cache.strings)) {
+             _cache.strings[locale] = {};
+           } // Only need to cache strings for supported issue types
+           // Using multiple individual item + class requests to reduce fetched data size

 
 

-           // Check whether this edit causes the geometry to break.
-           // If so, class the surface with a nope cursor.
-           // `includeDrawNode` - Only check the relevant line segments if finishing drawing
-           function checkGeometry(includeDrawNode) {
-               var nopeDisabled = context.surface().classed('nope-disabled');
-               var isInvalid = isInvalidGeometry(includeDrawNode);

 
 

-               if (nopeDisabled) {
-                   context.surface()
-                       .classed('nope', false)
-                       .classed('nope-suppressed', isInvalid);
-               } else {
-                   context.surface()
-                       .classed('nope', isInvalid)
-                       .classed('nope-suppressed', false);
-               }
-           }
+           var allRequests = items.map(function (itemType) {
+             // No need to request data we already have
+             if (itemType in _cache.strings[locale]) return null;

 
 

+             var cacheData = function cacheData(data) {
+               // Bunch of nested single value arrays of objects
+               var _data$categories = _slicedToArray(data.categories, 1),
+                   _data$categories$ = _data$categories[0],
+                   cat = _data$categories$ === void 0 ? {
+                 items: []
+               } : _data$categories$;

 
 

-           function isInvalidGeometry(includeDrawNode) {
+               var _cat$items = _slicedToArray(cat.items, 1),
+                   _cat$items$ = _cat$items[0],
+                   item = _cat$items$ === void 0 ? {
+                 "class": []
+               } : _cat$items$;

 
 

-               var testNode = _drawNode;
+               var _item$class = _slicedToArray(item["class"], 1),
+                   _item$class$ = _item$class[0],
+                   cl = _item$class$ === void 0 ? null : _item$class$; // If null default value is reached, data wasn't as expected (or was empty)

 
 

-               // we only need to test the single way we're drawing
-               var parentWay = context.graph().entity(wayID);
-               var nodes = context.graph().childNodes(parentWay).slice();  // shallow copy

 
 

-               if (includeDrawNode) {
-                   if (parentWay.isClosed()) {
-                       // don't test the last segment for closed ways - #4655
-                       // (still test the first segement)
-                       nodes.pop();
-                   }
-               } else { // discount the draw node
+               if (!cl) {
+                 /* eslint-disable no-console */
+                 console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
+                 /* eslint-enable no-console */

 
 

-                   if (parentWay.isClosed()) {
-                       if (nodes.length < 3) { return false; }
-                       if (_drawNode) { nodes.splice(-2, 1); }
-                       testNode = nodes[nodes.length - 2];
-                   } else {
-                       // there's nothing we need to test if we ignore the draw node on open ways
-                       return false;
-                   }
-               }
+                 return;
+               } // Cache served item colors to automatically style issue markers later

 
 

-               return testNode && geoHasSelfIntersections(nodes, testNode.id);
-           }

 
 

+               var itemInt = item.item,
+                   color = item.color;

 
 

-           function undone() {
+               if (/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/.test(color)) {
+                 _cache.colors[itemInt] = color;
+               } // Value of root key will be null if no string exists
+               // If string exists, value is an object with key 'auto' for string

 
 

-               // undoing removed the temp edit
-               _didResolveTempEdit = true;

 
 

-               context.pauseChangeDispatch();
+               var title = cl.title,
+                   detail = cl.detail,
+                   fix = cl.fix,
+                   trap = cl.trap; // Osmose titles shouldn't contain markdown

 
 

-               var nextMode;
+               var issueStrings = {};
+               if (title) issueStrings.title = title.auto;
+               if (detail) issueStrings.detail = marked_1(detail.auto);
+               if (trap) issueStrings.trap = marked_1(trap.auto);
+               if (fix) issueStrings.fix = marked_1(fix.auto);
+               _cache.strings[locale][itemType] = issueStrings;
+             };

 
 

-               if (context.graph() === startGraph) { // we've undone back to the beginning
-                   nextMode = modeSelect(context, [wayID]);
-               } else {
-                   context.history()
-                       .on('undone.draw', null);
-                   // remove whatever segment was drawn previously
-                   context.undo();
+             var _itemType$split = itemType.split('-'),
+                 _itemType$split2 = _slicedToArray(_itemType$split, 2),
+                 item = _itemType$split2[0],
+                 cl = _itemType$split2[1]; // Osmose API falls back to English strings where untranslated or if locale doesn't exist

 
 

-                   if (context.graph() === startGraph) { // we've undone back to the beginning
-                       nextMode = modeSelect(context, [wayID]);
-                   } else {
-                       // continue drawing
-                       nextMode = mode;
-                   }
-               }

 
 

-               // clear the redo stack by adding and removing an edit
-               context.perform(actionNoop());
-               context.pop(1);
+             var url = "".concat(_osmoseUrlRoot, "/items/").concat(item, "/class/").concat(cl, "?langs=").concat(locale);
+             return d3_json(url).then(cacheData);
+           }).filter(Boolean);
+           return Promise.all(allRequests).then(function () {
+             return _cache.strings[locale];
+           });
+         },
+         getStrings: function getStrings(itemType) {
+           var locale = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : _mainLocalizer.localeCode();
+           // No need to fallback to English, Osmose API handles this for us
+           return locale in _cache.strings ? _cache.strings[locale][itemType] : {};
+         },
+         getColor: function getColor(itemType) {
+           return itemType in _cache.colors ? _cache.colors[itemType] : '#FFFFFF';
+         },
+         postUpdate: function postUpdate(issue, callback) {
+           var _this3 = this;

 
 

-               context.resumeChangeDispatch();
-               context.enter(nextMode);
-           }
+           if (_cache.inflightPost[issue.id]) {
+             return callback({
+               message: 'Issue update already inflight',
+               status: -2
+             }, issue);
+           } // UI sets the status to either 'done' or 'false'

 
 
 
 

-           function setActiveElements() {
-               if (!_drawNode) { return; }
+           var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
+           var controller = new AbortController();

 
 

-               context.surface().selectAll('.' + _drawNode.id)
-                   .classed('active', true);
-           }
+           var after = function after() {
+             delete _cache.inflightPost[issue.id];

 
 

+             _this3.removeItem(issue);

 
 

-           function resetToStartGraph() {
-               while (context.graph() !== startGraph) {
-                   context.pop();
+             if (issue.newStatus === 'done') {
+               // Keep track of the number of issues closed per `item` to tag the changeset
+               if (!(issue.item in _cache.closed)) {
+                 _cache.closed[issue.item] = 0;

                }
                }

-           }

 
 

+               _cache.closed[issue.item] += 1;
+             }

 
 

-           var drawWay = function(surface) {
-               _drawNode = undefined;
-               _didResolveTempEdit = false;
-               _origWay = context.entity(wayID);
-               _headNodeID = typeof _nodeIndex === 'number' ? _origWay.nodes[_nodeIndex] :
-                   (_origWay.isClosed() ? _origWay.nodes[_origWay.nodes.length - 2] : _origWay.nodes[_origWay.nodes.length - 1]);
-               _wayGeometry = _origWay.geometry(context.graph());
-               _annotation = _t((_origWay.isDegenerate() ?
-                   'operations.start.annotation.' :
-                   'operations.continue.annotation.') + _wayGeometry
-               );
-               _pointerHasMoved = false;
-
-               // Push an annotated state for undo to return back to.
-               // We must make sure to replace or remove it later.
-               context.pauseChangeDispatch();
-               context.perform(actionNoop(), _annotation);
-               context.resumeChangeDispatch();
-
-               behavior.hover()
-                   .initialNodeID(_headNodeID);
-
-               behavior
-                   .on('move', function() {
-                       _pointerHasMoved = true;
-                       move.apply(this, arguments);
-                   })
-                   .on('down', function() {
-                       move.apply(this, arguments);
-                   })
-                   .on('downcancel', function() {
-                       if (_drawNode) { removeDrawNode(); }
-                   })
-                   .on('click', drawWay.add)
-                   .on('clickWay', drawWay.addWay)
-                   .on('clickNode', drawWay.addNode)
-                   .on('undo', context.undo)
-                   .on('cancel', drawWay.cancel)
-                   .on('finish', drawWay.finish);
-
-               select(window)
-                   .on('keydown.drawWay', keydown)
-                   .on('keyup.drawWay', keyup);
-
-               context.map()
-                   .dblclickZoomEnable(false)
-                   .on('drawn.draw', setActiveElements);
-
-               setActiveElements();
-
-               surface.call(behavior);
-
-               context.history()
-                   .on('undone.draw', undone);
+             if (callback) callback(null, issue);

            };
 
            };
 

+           _cache.inflightPost[issue.id] = controller;
+           fetch(url, {
+             signal: controller.signal
+           }).then(after)["catch"](function (err) {
+             delete _cache.inflightPost[issue.id];
+             if (callback) callback(err.message);
+           });
+         },
+         // Get all cached QAItems covering the viewport
+         getItems: function getItems(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           return _cache.rtree.search(bbox).map(function (d) {
+             return d.data;
+           });
+         },
+         // Get a QAItem from cache
+         // NOTE: Don't change method name until UI v3 is merged
+         getError: function getError(id) {
+           return _cache.data[id];
+         },
+         // get the name of the icon to display for this item
+         getIcon: function getIcon(itemType) {
+           return _osmoseData.icons[itemType];
+         },
+         // Replace a single QAItem in the cache
+         replaceItem: function replaceItem(item) {
+           if (!(item instanceof QAItem) || !item.id) return;
+           _cache.data[item.id] = item;
+           updateRtree$1(encodeIssueRtree(item), true); // true = replace

 
 

-           drawWay.off = function(surface) {
-
-               if (!_didResolveTempEdit) {
-                   // Drawing was interrupted unexpectedly.
-                   // This can happen if the user changes modes,
-                   // clicks geolocate button, a hashchange event occurs, etc.
+           return item;
+         },
+         // Remove a single QAItem from the cache
+         removeItem: function removeItem(item) {
+           if (!(item instanceof QAItem) || !item.id) return;
+           delete _cache.data[item.id];
+           updateRtree$1(encodeIssueRtree(item), false); // false = remove
+         },
+         // Used to populate `closed:osmose:*` changeset tags
+         getClosedCounts: function getClosedCounts() {
+           return _cache.closed;
+         },
+         itemURL: function itemURL(item) {
+           return "https://osmose.openstreetmap.fr/en/error/".concat(item.id);
+         }
+       };

 
 

-                   context.pauseChangeDispatch();
-                   resetToStartGraph();
-                   context.resumeChangeDispatch();
-               }
+       var ieee754$1 = {};

 
 

-               _drawNode = undefined;
-               _nodeIndex = undefined;
+       /*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */

 
 

-               context.map()
-                   .on('drawn.draw', null);
+       ieee754$1.read = function (buffer, offset, isLE, mLen, nBytes) {
+         var e, m;
+         var eLen = nBytes * 8 - mLen - 1;
+         var eMax = (1 << eLen) - 1;
+         var eBias = eMax >> 1;
+         var nBits = -7;
+         var i = isLE ? nBytes - 1 : 0;
+         var d = isLE ? -1 : 1;
+         var s = buffer[offset + i];
+         i += d;
+         e = s & (1 << -nBits) - 1;
+         s >>= -nBits;
+         nBits += eLen;

 
 

-               surface.call(behavior.off)
-                   .selectAll('.active')
-                   .classed('active', false);
+         for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}

 
 

-               surface
-                   .classed('nope', false)
-                   .classed('nope-suppressed', false)
-                   .classed('nope-disabled', false);
+         m = e & (1 << -nBits) - 1;
+         e >>= -nBits;
+         nBits += mLen;

 
 

-               select(window)
-                   .on('keydown.drawWay', null)
-                   .on('keyup.drawWay', null);
+         for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}

 
 

-               context.history()
-                   .on('undone.draw', null);
-           };
+         if (e === 0) {
+           e = 1 - eBias;
+         } else if (e === eMax) {
+           return m ? NaN : (s ? -1 : 1) * Infinity;
+         } else {
+           m = m + Math.pow(2, mLen);
+           e = e - eBias;
+         }

 
 

+         return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
+       };

 
 

-           function attemptAdd(d, loc, doAdd) {
+       ieee754$1.write = function (buffer, value, offset, isLE, mLen, nBytes) {
+         var e, m, c;
+         var eLen = nBytes * 8 - mLen - 1;
+         var eMax = (1 << eLen) - 1;
+         var eBias = eMax >> 1;
+         var rt = mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0;
+         var i = isLE ? 0 : nBytes - 1;
+         var d = isLE ? 1 : -1;
+         var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;
+         value = Math.abs(value);

 
 

-               if (_drawNode) {
-                   // move the node to the final loc in case move wasn't called
-                   // consistently (e.g. on touch devices)
-                   context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
-                   _drawNode = context.entity(_drawNode.id);
-               } else {
-                   createDrawNode(loc);
-               }
+         if (isNaN(value) || value === Infinity) {
+           m = isNaN(value) ? 1 : 0;
+           e = eMax;
+         } else {
+           e = Math.floor(Math.log(value) / Math.LN2);

 
 

-               checkGeometry(true /* includeDrawNode */);
-               if ((d && d.properties && d.properties.nope) || context.surface().classed('nope')) {
-                   if (!_pointerHasMoved) {
-                       // prevent the temporary draw node from appearing on touch devices
-                       removeDrawNode();
-                   }
-                   dispatch$1.call('rejectedSelfIntersection', this);
-                   return;   // can't click here
-               }
+           if (value * (c = Math.pow(2, -e)) < 1) {
+             e--;
+             c *= 2;
+           }

 
 

-               context.pauseChangeDispatch();
-               doAdd();
-               // we just replaced the temporary edit with the real one
-               _didResolveTempEdit = true;
-               context.resumeChangeDispatch();
+           if (e + eBias >= 1) {
+             value += rt / c;
+           } else {
+             value += rt * Math.pow(2, 1 - eBias);
+           }

 
 

-               context.enter(mode);
+           if (value * c >= 2) {
+             e++;
+             c /= 2;

            }
 
            }
 

+           if (e + eBias >= eMax) {
+             m = 0;
+             e = eMax;
+           } else if (e + eBias >= 1) {
+             m = (value * c - 1) * Math.pow(2, mLen);
+             e = e + eBias;
+           } else {
+             m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
+             e = 0;
+           }
+         }

 
 

-           // Accept the current position of the drawing node
-           drawWay.add = function(loc, d) {
-               attemptAdd(d, loc, function() {
-                   // don't need to do anything extra
-               });
-           };
+         for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}

 
 

+         e = e << mLen | m;
+         eLen += mLen;

 
 

-           // Connect the way to an existing way
-           drawWay.addWay = function(loc, edge, d) {
-               attemptAdd(d, loc, function() {
-                   context.replace(
-                       actionAddMidpoint({ loc: loc, edge: edge }, _drawNode),
-                       _annotation
-                   );
-               });
-           };
+         for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}

 
 

+         buffer[offset + i - d] |= s * 128;
+       };

 
 

-           // Connect the way to an existing node
-           drawWay.addNode = function(node, d) {
+       var pbf = Pbf;
+       var ieee754 = ieee754$1;

 
 

-               // finish drawing if the mapper targets the prior node
-               if (node.id === _headNodeID ||
-                   // or the first node when drawing an area
-                   (_origWay.isClosed() && node.id === _origWay.first())) {
-                   drawWay.finish();
-                   return;
-               }
+       function Pbf(buf) {
+         this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);
+         this.pos = 0;
+         this.type = 0;
+         this.length = this.buf.length;
+       }

 
 

-               attemptAdd(d, node.loc, function() {
-                   context.replace(
-                       function actionReplaceDrawNode(graph) {
-                           // remove the temporary draw node and insert the existing node
-                           // at the same index
+       Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum

 
 

-                           graph = graph
-                               .replace(graph.entity(wayID).removeNode(_drawNode.id))
-                               .remove(_drawNode);
-                           return graph
-                               .replace(graph.entity(wayID).addNode(node.id, _nodeIndex));
-                       },
-                       _annotation
-                   );
-               });
-           };
+       Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64

 
 

+       Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields

 
 

-           // Finish the draw operation, removing the temporary edit.
-           // If the way has enough nodes to be valid, it's selected.
-           // Otherwise, delete everything and return to browse mode.
-           drawWay.finish = function() {
-               checkGeometry(false /* includeDrawNode */);
-               if (context.surface().classed('nope')) {
-                   dispatch$1.call('rejectedSelfIntersection', this);
-                   return;   // can't click here
-               }
+       Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32

 
 

-               context.pauseChangeDispatch();
-               // remove the temporary edit
-               context.pop(1);
-               _didResolveTempEdit = true;
-               context.resumeChangeDispatch();
+       var SHIFT_LEFT_32 = (1 << 16) * (1 << 16),
+           SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32; // Threshold chosen based on both benchmarking and knowledge about browser string
+       // data structures (which currently switch structure types at 12 bytes or more)

 
 

-               var way = context.hasEntity(wayID);
-               if (!way || way.isDegenerate()) {
-                   drawWay.cancel();
-                   return;
-               }
+       var TEXT_DECODER_MIN_LENGTH = 12;
+       var utf8TextDecoder = typeof TextDecoder === 'undefined' ? null : new TextDecoder('utf8');
+       Pbf.prototype = {
+         destroy: function destroy() {
+           this.buf = null;
+         },
+         // === READING =================================================================
+         readFields: function readFields(readField, result, end) {
+           end = end || this.length;

 
 

-               window.setTimeout(function() {
-                   context.map().dblclickZoomEnable(true);
-               }, 1000);
+           while (this.pos < end) {
+             var val = this.readVarint(),
+                 tag = val >> 3,
+                 startPos = this.pos;
+             this.type = val & 0x7;
+             readField(tag, result, this);
+             if (this.pos === startPos) this.skip(val);
+           }

 
 

-               var isNewFeature = !mode.isContinuing;
-               context.enter(modeSelect(context, [wayID]).newFeature(isNewFeature));
-           };
+           return result;
+         },
+         readMessage: function readMessage(readField, result) {
+           return this.readFields(readField, result, this.readVarint() + this.pos);
+         },
+         readFixed32: function readFixed32() {
+           var val = readUInt32(this.buf, this.pos);
+           this.pos += 4;
+           return val;
+         },
+         readSFixed32: function readSFixed32() {
+           var val = readInt32(this.buf, this.pos);
+           this.pos += 4;
+           return val;
+         },
+         // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)
+         readFixed64: function readFixed64() {
+           var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
+           this.pos += 8;
+           return val;
+         },
+         readSFixed64: function readSFixed64() {
+           var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
+           this.pos += 8;
+           return val;
+         },
+         readFloat: function readFloat() {
+           var val = ieee754.read(this.buf, this.pos, true, 23, 4);
+           this.pos += 4;
+           return val;
+         },
+         readDouble: function readDouble() {
+           var val = ieee754.read(this.buf, this.pos, true, 52, 8);
+           this.pos += 8;
+           return val;
+         },
+         readVarint: function readVarint(isSigned) {
+           var buf = this.buf,
+               val,
+               b;
+           b = buf[this.pos++];
+           val = b & 0x7f;
+           if (b < 0x80) return val;
+           b = buf[this.pos++];
+           val |= (b & 0x7f) << 7;
+           if (b < 0x80) return val;
+           b = buf[this.pos++];
+           val |= (b & 0x7f) << 14;
+           if (b < 0x80) return val;
+           b = buf[this.pos++];
+           val |= (b & 0x7f) << 21;
+           if (b < 0x80) return val;
+           b = buf[this.pos];
+           val |= (b & 0x0f) << 28;
+           return readVarintRemainder(val, isSigned, this);
+         },
+         readVarint64: function readVarint64() {
+           // for compatibility with v2.0.1
+           return this.readVarint(true);
+         },
+         readSVarint: function readSVarint() {
+           var num = this.readVarint();
+           return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
+         },
+         readBoolean: function readBoolean() {
+           return Boolean(this.readVarint());
+         },
+         readString: function readString() {
+           var end = this.readVarint() + this.pos;
+           var pos = this.pos;
+           this.pos = end;

 
 

+           if (end - pos >= TEXT_DECODER_MIN_LENGTH && utf8TextDecoder) {
+             // longer strings are fast with the built-in browser TextDecoder API
+             return readUtf8TextDecoder(this.buf, pos, end);
+           } // short strings are fast with our custom implementation

 
 

-           // Cancel the draw operation, delete everything, and return to browse mode.
-           drawWay.cancel = function() {
-               context.pauseChangeDispatch();
-               resetToStartGraph();
-               context.resumeChangeDispatch();

 
 

-               window.setTimeout(function() {
-                   context.map().dblclickZoomEnable(true);
-               }, 1000);
+           return readUtf8(this.buf, pos, end);
+         },
+         readBytes: function readBytes() {
+           var end = this.readVarint() + this.pos,
+               buffer = this.buf.subarray(this.pos, end);
+           this.pos = end;
+           return buffer;
+         },
+         // verbose for performance reasons; doesn't affect gzipped size
+         readPackedVarint: function readPackedVarint(arr, isSigned) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readVarint(isSigned));
+           var end = readPackedEnd(this);
+           arr = arr || [];

 
 

-               context.surface()
-                   .classed('nope', false)
-                   .classed('nope-disabled', false)
-                   .classed('nope-suppressed', false);
+           while (this.pos < end) {
+             arr.push(this.readVarint(isSigned));
+           }

 
 

-               context.enter(modeBrowse(context));
-           };
+           return arr;
+         },
+         readPackedSVarint: function readPackedSVarint(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
+           var end = readPackedEnd(this);
+           arr = arr || [];

 
 

+           while (this.pos < end) {
+             arr.push(this.readSVarint());
+           }

 
 

-           drawWay.nodeIndex = function(val) {
-               if (!arguments.length) { return _nodeIndex; }
-               _nodeIndex = val;
-               return drawWay;
-           };
+           return arr;
+         },
+         readPackedBoolean: function readPackedBoolean(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
+           var end = readPackedEnd(this);
+           arr = arr || [];

 
 

+           while (this.pos < end) {
+             arr.push(this.readBoolean());
+           }

 
 

-           drawWay.activeID = function() {
-               if (!arguments.length) { return _drawNode && _drawNode.id; }
-               // no assign
-               return drawWay;
-           };
+           return arr;
+         },
+         readPackedFloat: function readPackedFloat(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
+           var end = readPackedEnd(this);
+           arr = arr || [];

 
 

+           while (this.pos < end) {
+             arr.push(this.readFloat());
+           }

 
 

-           return utilRebind(drawWay, dispatch$1, 'on');
-       }
+           return arr;
+         },
+         readPackedDouble: function readPackedDouble(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
+           var end = readPackedEnd(this);
+           arr = arr || [];

 
 

-       function modeDrawLine(context, wayID, startGraph, button, affix, continuing) {
-           var mode = {
-               button: button,
-               id: 'draw-line'
-           };
+           while (this.pos < end) {
+             arr.push(this.readDouble());
+           }

 
 

-           var behavior = behaviorDrawWay(context, wayID, mode, startGraph)
-               .on('rejectedSelfIntersection.modeDrawLine', function() {
-                   context.ui().flash
-                       .text(_t('self_intersection.error.lines'))();
-               });
+           return arr;
+         },
+         readPackedFixed32: function readPackedFixed32(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());
+           var end = readPackedEnd(this);
+           arr = arr || [];

 
 

-           mode.wayID = wayID;
+           while (this.pos < end) {
+             arr.push(this.readFixed32());
+           }

 
 

-           mode.isContinuing = continuing;
+           return arr;
+         },
+         readPackedSFixed32: function readPackedSFixed32(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed32());
+           var end = readPackedEnd(this);
+           arr = arr || [];

 
 

-           mode.enter = function() {
-               behavior
-                   .nodeIndex(affix === 'prefix' ? 0 : undefined);
+           while (this.pos < end) {
+             arr.push(this.readSFixed32());
+           }

 
 

-               context.install(behavior);
-           };
+           return arr;
+         },
+         readPackedFixed64: function readPackedFixed64(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());
+           var end = readPackedEnd(this);
+           arr = arr || [];

 
 

-           mode.exit = function() {
-               context.uninstall(behavior);
-           };
+           while (this.pos < end) {
+             arr.push(this.readFixed64());
+           }

 
 

-           mode.selectedIDs = function() {
-               return [wayID];
-           };
+           return arr;
+         },
+         readPackedSFixed64: function readPackedSFixed64(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
+           var end = readPackedEnd(this);
+           arr = arr || [];

 
 

-           mode.activeID = function() {
-               return (behavior && behavior.activeID()) || [];
-           };
+           while (this.pos < end) {
+             arr.push(this.readSFixed64());
+           }

 
 

-           return mode;
-       }
+           return arr;
+         },
+         skip: function skip(val) {
+           var type = val & 0x7;
+           if (type === Pbf.Varint) while (this.buf[this.pos++] > 0x7f) {} else if (type === Pbf.Bytes) this.pos = this.readVarint() + this.pos;else if (type === Pbf.Fixed32) this.pos += 4;else if (type === Pbf.Fixed64) this.pos += 8;else throw new Error('Unimplemented type: ' + type);
+         },
+         // === WRITING =================================================================
+         writeTag: function writeTag(tag, type) {
+           this.writeVarint(tag << 3 | type);
+         },
+         realloc: function realloc(min) {
+           var length = this.length || 16;

 
 

-       function operationContinue(context, selectedIDs) {
-           var graph = context.graph();
-           var entities = selectedIDs.map(function(id) { return graph.entity(id); });
-           var geometries = Object.assign(
-               { line: [], vertex: [] },
-               utilArrayGroupBy(entities, function(entity) { return entity.geometry(graph); })
-           );
-           var vertex = geometries.vertex[0];
+           while (length < this.pos + min) {
+             length *= 2;
+           }

 
 

+           if (length !== this.length) {
+             var buf = new Uint8Array(length);
+             buf.set(this.buf);
+             this.buf = buf;
+             this.length = length;
+           }
+         },
+         finish: function finish() {
+           this.length = this.pos;
+           this.pos = 0;
+           return this.buf.subarray(0, this.length);
+         },
+         writeFixed32: function writeFixed32(val) {
+           this.realloc(4);
+           writeInt32(this.buf, val, this.pos);
+           this.pos += 4;
+         },
+         writeSFixed32: function writeSFixed32(val) {
+           this.realloc(4);
+           writeInt32(this.buf, val, this.pos);
+           this.pos += 4;
+         },
+         writeFixed64: function writeFixed64(val) {
+           this.realloc(8);
+           writeInt32(this.buf, val & -1, this.pos);
+           writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
+           this.pos += 8;
+         },
+         writeSFixed64: function writeSFixed64(val) {
+           this.realloc(8);
+           writeInt32(this.buf, val & -1, this.pos);
+           writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
+           this.pos += 8;
+         },
+         writeVarint: function writeVarint(val) {
+           val = +val || 0;

 
 

-           function candidateWays() {
-               return graph.parentWays(vertex).filter(function(parent) {
-                   return parent.geometry(graph) === 'line' &&
-                       !parent.isClosed() &&
-                       parent.affix(vertex.id) &&
-                       (geometries.line.length === 0 || geometries.line[0] === parent);
-               });
+           if (val > 0xfffffff || val < 0) {
+             writeBigVarint(val, this);
+             return;

            }
 
            }
 

+           this.realloc(4);
+           this.buf[this.pos++] = val & 0x7f | (val > 0x7f ? 0x80 : 0);
+           if (val <= 0x7f) return;
+           this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
+           if (val <= 0x7f) return;
+           this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
+           if (val <= 0x7f) return;
+           this.buf[this.pos++] = val >>> 7 & 0x7f;
+         },
+         writeSVarint: function writeSVarint(val) {
+           this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);
+         },
+         writeBoolean: function writeBoolean(val) {
+           this.writeVarint(Boolean(val));
+         },
+         writeString: function writeString(str) {
+           str = String(str);
+           this.realloc(str.length * 4);
+           this.pos++; // reserve 1 byte for short string length

 
 

-           var operation = function() {
-               var candidate = candidateWays()[0];
-               context.enter(
-                   modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(vertex.id), true)
-               );
-           };
+           var startPos = this.pos; // write the string directly to the buffer and see how much was written

 
 

+           this.pos = writeUtf8(this.buf, str, this.pos);
+           var len = this.pos - startPos;
+           if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position

 
 

-           operation.available = function() {
-               return geometries.vertex.length === 1 &&
-                   geometries.line.length <= 1 &&
-                   !context.features().hasHiddenConnections(vertex, context.graph());
-           };
+           this.pos = startPos - 1;
+           this.writeVarint(len);
+           this.pos += len;
+         },
+         writeFloat: function writeFloat(val) {
+           this.realloc(4);
+           ieee754.write(this.buf, val, this.pos, true, 23, 4);
+           this.pos += 4;
+         },
+         writeDouble: function writeDouble(val) {
+           this.realloc(8);
+           ieee754.write(this.buf, val, this.pos, true, 52, 8);
+           this.pos += 8;
+         },
+         writeBytes: function writeBytes(buffer) {
+           var len = buffer.length;
+           this.writeVarint(len);
+           this.realloc(len);

 
 

+           for (var i = 0; i < len; i++) {
+             this.buf[this.pos++] = buffer[i];
+           }
+         },
+         writeRawMessage: function writeRawMessage(fn, obj) {
+           this.pos++; // reserve 1 byte for short message length
+           // write the message directly to the buffer and see how much was written
+
+           var startPos = this.pos;
+           fn(obj, this);
+           var len = this.pos - startPos;
+           if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position
+
+           this.pos = startPos - 1;
+           this.writeVarint(len);
+           this.pos += len;
+         },
+         writeMessage: function writeMessage(tag, fn, obj) {
+           this.writeTag(tag, Pbf.Bytes);
+           this.writeRawMessage(fn, obj);
+         },
+         writePackedVarint: function writePackedVarint(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedVarint, arr);
+         },
+         writePackedSVarint: function writePackedSVarint(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedSVarint, arr);
+         },
+         writePackedBoolean: function writePackedBoolean(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedBoolean, arr);
+         },
+         writePackedFloat: function writePackedFloat(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedFloat, arr);
+         },
+         writePackedDouble: function writePackedDouble(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedDouble, arr);
+         },
+         writePackedFixed32: function writePackedFixed32(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedFixed, arr);
+         },
+         writePackedSFixed32: function writePackedSFixed32(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedSFixed, arr);
+         },
+         writePackedFixed64: function writePackedFixed64(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedFixed2, arr);
+         },
+         writePackedSFixed64: function writePackedSFixed64(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedSFixed2, arr);
+         },
+         writeBytesField: function writeBytesField(tag, buffer) {
+           this.writeTag(tag, Pbf.Bytes);
+           this.writeBytes(buffer);
+         },
+         writeFixed32Field: function writeFixed32Field(tag, val) {
+           this.writeTag(tag, Pbf.Fixed32);
+           this.writeFixed32(val);
+         },
+         writeSFixed32Field: function writeSFixed32Field(tag, val) {
+           this.writeTag(tag, Pbf.Fixed32);
+           this.writeSFixed32(val);
+         },
+         writeFixed64Field: function writeFixed64Field(tag, val) {
+           this.writeTag(tag, Pbf.Fixed64);
+           this.writeFixed64(val);
+         },
+         writeSFixed64Field: function writeSFixed64Field(tag, val) {
+           this.writeTag(tag, Pbf.Fixed64);
+           this.writeSFixed64(val);
+         },
+         writeVarintField: function writeVarintField(tag, val) {
+           this.writeTag(tag, Pbf.Varint);
+           this.writeVarint(val);
+         },
+         writeSVarintField: function writeSVarintField(tag, val) {
+           this.writeTag(tag, Pbf.Varint);
+           this.writeSVarint(val);
+         },
+         writeStringField: function writeStringField(tag, str) {
+           this.writeTag(tag, Pbf.Bytes);
+           this.writeString(str);
+         },
+         writeFloatField: function writeFloatField(tag, val) {
+           this.writeTag(tag, Pbf.Fixed32);
+           this.writeFloat(val);
+         },
+         writeDoubleField: function writeDoubleField(tag, val) {
+           this.writeTag(tag, Pbf.Fixed64);
+           this.writeDouble(val);
+         },
+         writeBooleanField: function writeBooleanField(tag, val) {
+           this.writeVarintField(tag, Boolean(val));
+         }
+       };

 
 

-           operation.disabled = function() {
-               var candidates = candidateWays();
-               if (candidates.length === 0) {
-                   return 'not_eligible';
-               } else if (candidates.length > 1) {
-                   return 'multiple';
-               }
+       function readVarintRemainder(l, s, p) {
+         var buf = p.buf,
+             h,
+             b;
+         b = buf[p.pos++];
+         h = (b & 0x70) >> 4;
+         if (b < 0x80) return toNum(l, h, s);
+         b = buf[p.pos++];
+         h |= (b & 0x7f) << 3;
+         if (b < 0x80) return toNum(l, h, s);
+         b = buf[p.pos++];
+         h |= (b & 0x7f) << 10;
+         if (b < 0x80) return toNum(l, h, s);
+         b = buf[p.pos++];
+         h |= (b & 0x7f) << 17;
+         if (b < 0x80) return toNum(l, h, s);
+         b = buf[p.pos++];
+         h |= (b & 0x7f) << 24;
+         if (b < 0x80) return toNum(l, h, s);
+         b = buf[p.pos++];
+         h |= (b & 0x01) << 31;
+         if (b < 0x80) return toNum(l, h, s);
+         throw new Error('Expected varint not more than 10 bytes');
+       }

 
 

-               return false;
-           };
+       function readPackedEnd(pbf) {
+         return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
+       }

 
 

+       function toNum(low, high, isSigned) {
+         if (isSigned) {
+           return high * 0x100000000 + (low >>> 0);
+         }

 
 

-           operation.tooltip = function() {
-               var disable = operation.disabled();
-               return disable ?
-                   _t('operations.continue.' + disable) :
-                   _t('operations.continue.description');
-           };
+         return (high >>> 0) * 0x100000000 + (low >>> 0);
+       }

 
 

+       function writeBigVarint(val, pbf) {
+         var low, high;

 
 

-           operation.annotation = function() {
-               return _t('operations.continue.annotation.line');
-           };
+         if (val >= 0) {
+           low = val % 0x100000000 | 0;
+           high = val / 0x100000000 | 0;
+         } else {
+           low = ~(-val % 0x100000000);
+           high = ~(-val / 0x100000000);

 
 

+           if (low ^ 0xffffffff) {
+             low = low + 1 | 0;
+           } else {
+             low = 0;
+             high = high + 1 | 0;
+           }
+         }

 
 

-           operation.id = 'continue';
-           operation.keys = [_t('operations.continue.key')];
-           operation.title = _t('operations.continue.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+         if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
+           throw new Error('Given varint doesn\'t fit into 10 bytes');
+         }

 
 

-           return operation;
+         pbf.realloc(10);
+         writeBigVarintLow(low, high, pbf);
+         writeBigVarintHigh(high, pbf);

        }
 
        }
 

-       function operationCopy(context, selectedIDs) {
-
-           var _multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+       function writeBigVarintLow(low, high, pbf) {
+         pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+         low >>>= 7;
+         pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+         low >>>= 7;
+         pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+         low >>>= 7;
+         pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+         low >>>= 7;
+         pbf.buf[pbf.pos] = low & 0x7f;
+       }

 
 

-           function getFilteredIdsToCopy() {
-               return selectedIDs.filter(function(selectedID) {
-                   var entity = context.graph().hasEntity(selectedID);
-                   // don't copy untagged vertices separately from ways
-                   return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
-               });
-           }
+       function writeBigVarintHigh(high, pbf) {
+         var lsb = (high & 0x07) << 4;
+         pbf.buf[pbf.pos++] |= lsb | ((high >>>= 3) ? 0x80 : 0);
+         if (!high) return;
+         pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+         if (!high) return;
+         pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+         if (!high) return;
+         pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+         if (!high) return;
+         pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+         if (!high) return;
+         pbf.buf[pbf.pos++] = high & 0x7f;
+       }

 
 

-           var operation = function() {
+       function makeRoomForExtraLength(startPos, len, pbf) {
+         var extraLen = len <= 0x3fff ? 1 : len <= 0x1fffff ? 2 : len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7)); // if 1 byte isn't enough for encoding message length, shift the data to the right

 
 

-               if (!getSelectionText()) {
-                   event.preventDefault();
-               }
+         pbf.realloc(extraLen);

 
 

-               var graph = context.graph();
-               var selected = groupEntities(getFilteredIdsToCopy(), graph);
-               var canCopy = [];
-               var skip = {};
-               var entity;
-               var i;
+         for (var i = pbf.pos - 1; i >= startPos; i--) {
+           pbf.buf[i + extraLen] = pbf.buf[i];
+         }
+       }

 
 

-               for (i = 0; i < selected.relation.length; i++) {
-                   entity = selected.relation[i];
-                   if (!skip[entity.id] && entity.isComplete(graph)) {
-                       canCopy.push(entity.id);
-                       skip = getDescendants(entity.id, graph, skip);
-                   }
-               }
-               for (i = 0; i < selected.way.length; i++) {
-                   entity = selected.way[i];
-                   if (!skip[entity.id]) {
-                       canCopy.push(entity.id);
-                       skip = getDescendants(entity.id, graph, skip);
-                   }
-               }
-               for (i = 0; i < selected.node.length; i++) {
-                   entity = selected.node[i];
-                   if (!skip[entity.id]) {
-                       canCopy.push(entity.id);
-                   }
-               }
+       function _writePackedVarint(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeVarint(arr[i]);
+         }
+       }

 
 

-               context.copyIDs(canCopy);
-               if (_point &&
-                   (canCopy.length !== 1 || graph.entity(canCopy[0]).type !== 'node')) {
-                   // store the anchor coordinates if copying more than a single node
-                   context.copyLonLat(context.projection.invert(_point));
-               } else {
-                   context.copyLonLat(null);
-               }
+       function _writePackedSVarint(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeSVarint(arr[i]);
+         }
+       }

 
 

-           };
+       function _writePackedFloat(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeFloat(arr[i]);
+         }
+       }

 
 

+       function _writePackedDouble(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeDouble(arr[i]);
+         }
+       }

 
 

-           function groupEntities(ids, graph) {
-               var entities = ids.map(function (id) { return graph.entity(id); });
-               return Object.assign(
-                   { relation: [], way: [], node: [] },
-                   utilArrayGroupBy(entities, 'type')
-               );
-           }
+       function _writePackedBoolean(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeBoolean(arr[i]);
+         }
+       }

 
 

+       function _writePackedFixed(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeFixed32(arr[i]);
+         }
+       }

 
 

-           function getDescendants(id, graph, descendants) {
-               var entity = graph.entity(id);
-               var children;
+       function _writePackedSFixed(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeSFixed32(arr[i]);
+         }
+       }

 
 

-               descendants = descendants || {};
+       function _writePackedFixed2(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeFixed64(arr[i]);
+         }
+       }

 
 

-               if (entity.type === 'relation') {
-                   children = entity.members.map(function(m) { return m.id; });
-               } else if (entity.type === 'way') {
-                   children = entity.nodes;
-               } else {
-                   children = [];
-               }
+       function _writePackedSFixed2(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeSFixed64(arr[i]);
+         }
+       } // Buffer code below from https://github.com/feross/buffer, MIT-licensed

 
 

-               for (var i = 0; i < children.length; i++) {
-                   if (!descendants[children[i]]) {
-                       descendants[children[i]] = true;
-                       descendants = getDescendants(children[i], graph, descendants);
-                   }
-               }

 
 

-               return descendants;
-           }
+       function readUInt32(buf, pos) {
+         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
+       }

 
 

+       function writeInt32(buf, val, pos) {
+         buf[pos] = val;
+         buf[pos + 1] = val >>> 8;
+         buf[pos + 2] = val >>> 16;
+         buf[pos + 3] = val >>> 24;
+       }

 
 

-           function getSelectionText() {
-               return window.getSelection().toString();
-           }
+       function readInt32(buf, pos) {
+         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + (buf[pos + 3] << 24);
+       }

 
 

+       function readUtf8(buf, pos, end) {
+         var str = '';
+         var i = pos;

 
 

-           operation.available = function() {
-               return getFilteredIdsToCopy().length > 0;
-           };
+         while (i < end) {
+           var b0 = buf[i];
+           var c = null; // codepoint

 
 

+           var bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
+           if (i + bytesPerSequence > end) break;
+           var b1, b2, b3;

 
 

-           operation.disabled = function() {
-               var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
-               if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-                   return 'too_large';
-               }
-               return false;
-           };
+           if (bytesPerSequence === 1) {
+             if (b0 < 0x80) {
+               c = b0;
+             }
+           } else if (bytesPerSequence === 2) {
+             b1 = buf[i + 1];

 
 

+             if ((b1 & 0xC0) === 0x80) {
+               c = (b0 & 0x1F) << 0x6 | b1 & 0x3F;

 
 

-           operation.tooltip = function() {
-               var disable = operation.disabled();
-               return disable ?
-                   _t('operations.copy.' + disable + '.' + _multi) :
-                   _t('operations.copy.description' + '.' + _multi);
-           };
+               if (c <= 0x7F) {
+                 c = null;
+               }
+             }
+           } else if (bytesPerSequence === 3) {
+             b1 = buf[i + 1];
+             b2 = buf[i + 2];

 
 

+             if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
+               c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | b2 & 0x3F;

 
 

-           operation.annotation = function() {
-               return selectedIDs.length === 1 ?
-                   _t('operations.copy.annotation.single') :
-                   _t('operations.copy.annotation.multiple', { n: selectedIDs.length.toString() });
-           };
+               if (c <= 0x7FF || c >= 0xD800 && c <= 0xDFFF) {
+                 c = null;
+               }
+             }
+           } else if (bytesPerSequence === 4) {
+             b1 = buf[i + 1];
+             b2 = buf[i + 2];
+             b3 = buf[i + 3];

 
 

+             if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
+               c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | b3 & 0x3F;

 
 

-           var _point;
-           operation.point = function(val) {
-               _point = val;
-               return operation;
-           };
+               if (c <= 0xFFFF || c >= 0x110000) {
+                 c = null;
+               }
+             }
+           }

 
 

+           if (c === null) {
+             c = 0xFFFD;
+             bytesPerSequence = 1;
+           } else if (c > 0xFFFF) {
+             c -= 0x10000;
+             str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
+             c = 0xDC00 | c & 0x3FF;
+           }

 
 

-           operation.id = 'copy';
-           operation.keys = [uiCmd('⌘C')];
-           operation.title = _t('operations.copy.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+           str += String.fromCharCode(c);
+           i += bytesPerSequence;
+         }

 
 

-           return operation;
+         return str;

        }
 
        }
 

-       function operationDisconnect(context, selectedIDs) {
-           var _vertexIDs = [];
-           var _wayIDs = [];
-           var _otherIDs = [];
-           var _actions = [];
+       function readUtf8TextDecoder(buf, pos, end) {
+         return utf8TextDecoder.decode(buf.subarray(pos, end));
+       }

 
 

-           selectedIDs.forEach(function(id) {
-               var entity = context.entity(id);
-               if (entity.type === 'way'){
-                   _wayIDs.push(id);
-               } else if (entity.geometry(context.graph()) === 'vertex') {
-                   _vertexIDs.push(id);
+       function writeUtf8(buf, str, pos) {
+         for (var i = 0, c, lead; i < str.length; i++) {
+           c = str.charCodeAt(i); // code point
+
+           if (c > 0xD7FF && c < 0xE000) {
+             if (lead) {
+               if (c < 0xDC00) {
+                 buf[pos++] = 0xEF;
+                 buf[pos++] = 0xBF;
+                 buf[pos++] = 0xBD;
+                 lead = c;
+                 continue;

                } else {
                } else {

-                   _otherIDs.push(id);
+                 c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;
+                 lead = null;

                }
                }

-           });
-
-           var _extent, _nodes, _coords, _descriptionID = '', _annotationID = 'features';
-
-           if (_vertexIDs.length > 0) {
-               // At the selected vertices, disconnect the selected ways, if any, else
-               // disconnect all connected ways
-
-               _extent = utilTotalExtent(_vertexIDs, context.graph());
-
-               _vertexIDs.forEach(function(vertexID) {
-                   var action = actionDisconnect(vertexID);
-
-                   if (_wayIDs.length > 0) {
-                       var waysIDsForVertex = _wayIDs.filter(function(wayID) {
-                           var way = context.entity(wayID);
-                           return way.nodes.indexOf(vertexID) !== -1;
-                       });
-                       action.limitWays(waysIDsForVertex);
-                   }
-                   _actions.push(action);
-               });
-
-               _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
-               if (_wayIDs.length === 1) {
-                   _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
+             } else {
+               if (c > 0xDBFF || i + 1 === str.length) {
+                 buf[pos++] = 0xEF;
+                 buf[pos++] = 0xBF;
+                 buf[pos++] = 0xBD;

                } else {
                } else {

-                   _descriptionID += _wayIDs.length === 0 ? 'no_ways' : 'multiple_ways';
+                 lead = c;

                }
 
                }
 

-           } else if (_wayIDs.length > 0) {
-               // Disconnect the selected ways from each other, if they're connected,
-               // else disconnect them from all connected ways
-
-               var ways = _wayIDs.map(function(id) {
-                   return context.entity(id);
-               });
-               _nodes = utilGetAllNodes(_wayIDs, context.graph());
-               _coords = _nodes.map(function(n) { return n.loc; });
-               _extent = utilTotalExtent(ways, context.graph());
-
-               // actions for connected nodes shared by at least two selected ways
-               var sharedActions = [];
-               // actions for connected nodes
-               var unsharedActions = [];
-
-               _nodes.forEach(function(node) {
-                   var action = actionDisconnect(node.id).limitWays(_wayIDs);
-                   if (action.disabled(context.graph()) !== 'not_connected') {
-
-                       var count = 0;
-                       for (var i in ways) {
-                           var way = ways[i];
-                           if (way.nodes.indexOf(node.id) !== -1) {
-                               count += 1;
-                           }
-                           if (count > 1) { break; }
-                       }
-
-                       if (count > 1) {
-                           sharedActions.push(action);
-                       } else {
-                           unsharedActions.push(action);
-                       }
-                   }
-               });
-
-               _descriptionID += 'no_points.';
-               _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';
+               continue;
+             }
+           } else if (lead) {
+             buf[pos++] = 0xEF;
+             buf[pos++] = 0xBF;
+             buf[pos++] = 0xBD;
+             lead = null;
+           }

 
 

-               if (sharedActions.length) {
-                   // if any nodes are shared, only disconnect the selected ways from each other
-                   _actions = sharedActions;
-                   _descriptionID += 'conjoined';
-                   _annotationID = 'from_each_other';
+           if (c < 0x80) {
+             buf[pos++] = c;
+           } else {
+             if (c < 0x800) {
+               buf[pos++] = c >> 0x6 | 0xC0;
+             } else {
+               if (c < 0x10000) {
+                 buf[pos++] = c >> 0xC | 0xE0;

                } else {
                } else {

-                   // if no nodes are shared, disconnect the selected ways from all connected ways
-                   _actions = unsharedActions;
-                   if (_wayIDs.length === 1) {
-                       _descriptionID += context.graph().geometry(_wayIDs[0]);
-                   } else {
-                       _descriptionID += 'separate';
-                   }
+                 buf[pos++] = c >> 0x12 | 0xF0;
+                 buf[pos++] = c >> 0xC & 0x3F | 0x80;

                }
                }

-           }
-

 
 

-           var operation = function() {
-               context.perform(function(graph) {
-                   return _actions.reduce(function(graph, action) { return action(graph); }, graph);
-               }, operation.annotation());
+               buf[pos++] = c >> 0x6 & 0x3F | 0x80;
+             }

 
 

-               context.validator().validate();
-           };
+             buf[pos++] = c & 0x3F | 0x80;
+           }
+         }

 
 

+         return pos;
+       }

 
 

-           operation.available = function() {
-               if (_actions.length === 0) { return false; }
-               if (_otherIDs.length !== 0) { return false; }
+       var vectorTile = {};

 
 

-               if (_vertexIDs.length !== 0 && _wayIDs.length !== 0 && !_wayIDs.every(function(wayID) {
-                   return _vertexIDs.some(function(vertexID) {
-                       var way = context.entity(wayID);
-                       return way.nodes.indexOf(vertexID) !== -1;
-                   });
-               })) { return false; }
+       var pointGeometry = Point$1;
+       /**
+        * A standalone point geometry with useful accessor, comparison, and
+        * modification methods.
+        *
+        * @class Point
+        * @param {Number} x the x-coordinate. this could be longitude or screen
+        * pixels, or any other sort of unit.
+        * @param {Number} y the y-coordinate. this could be latitude or screen
+        * pixels, or any other sort of unit.
+        * @example
+        * var point = new Point(-77, 38);
+        */

 
 

-               return true;
-           };
+       function Point$1(x, y) {
+         this.x = x;
+         this.y = y;
+       }

 
 

+       Point$1.prototype = {
+         /**
+          * Clone this point, returning a new point that can be modified
+          * without affecting the old one.
+          * @return {Point} the clone
+          */
+         clone: function clone() {
+           return new Point$1(this.x, this.y);
+         },

 
 

-           operation.disabled = function() {
-               var reason;
-               for (var actionIndex in _actions) {
-                   reason = _actions[actionIndex].disabled(context.graph());
-                   if (reason) { return reason; }
-               }
+         /**
+          * Add this point's x & y coordinates to another point,
+          * yielding a new point.
+          * @param {Point} p the other point
+          * @return {Point} output point
+          */
+         add: function add(p) {
+           return this.clone()._add(p);
+         },

 
 

-               if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
-                   return 'too_large.' + ((_vertexIDs.length ? _vertexIDs : _wayIDs).length === 1 ? 'single' : 'multiple');
-               } else if (_coords && someMissing()) {
-                   return 'not_downloaded';
-               } else if (selectedIDs.some(context.hasHiddenConnections)) {
-                   return 'connected_to_hidden';
-               }
+         /**
+          * Subtract this point's x & y coordinates to from point,
+          * yielding a new point.
+          * @param {Point} p the other point
+          * @return {Point} output point
+          */
+         sub: function sub(p) {
+           return this.clone()._sub(p);
+         },

 
 

-               return false;
+         /**
+          * Multiply this point's x & y coordinates by point,
+          * yielding a new point.
+          * @param {Point} p the other point
+          * @return {Point} output point
+          */
+         multByPoint: function multByPoint(p) {
+           return this.clone()._multByPoint(p);
+         },

 
 

+         /**
+          * Divide this point's x & y coordinates by point,
+          * yielding a new point.
+          * @param {Point} p the other point
+          * @return {Point} output point
+          */
+         divByPoint: function divByPoint(p) {
+           return this.clone()._divByPoint(p);
+         },

 
 

-               function someMissing() {
-                   if (context.inIntro()) { return false; }
-                   var osm = context.connection();
-                   if (osm) {
-                       var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-                       if (missing.length) {
-                           missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-                           return true;
-                       }
-                   }
-                   return false;
-               }
-           };
+         /**
+          * Multiply this point's x & y coordinates by a factor,
+          * yielding a new point.
+          * @param {Point} k factor
+          * @return {Point} output point
+          */
+         mult: function mult(k) {
+           return this.clone()._mult(k);
+         },

 
 

+         /**
+          * Divide this point's x & y coordinates by a factor,
+          * yielding a new point.
+          * @param {Point} k factor
+          * @return {Point} output point
+          */
+         div: function div(k) {
+           return this.clone()._div(k);
+         },

 
 

-           operation.tooltip = function() {
-               var disable = operation.disabled();
-               if (disable) {
-                   return _t('operations.disconnect.' + disable);
-               }
-               return _t('operations.disconnect.description.' + _descriptionID);
-           };
+         /**
+          * Rotate this point around the 0, 0 origin by an angle a,
+          * given in radians
+          * @param {Number} a angle to rotate around, in radians
+          * @return {Point} output point
+          */
+         rotate: function rotate(a) {
+           return this.clone()._rotate(a);
+         },

 
 

+         /**
+          * Rotate this point around p point by an angle a,
+          * given in radians
+          * @param {Number} a angle to rotate around, in radians
+          * @param {Point} p Point to rotate around
+          * @return {Point} output point
+          */
+         rotateAround: function rotateAround(a, p) {
+           return this.clone()._rotateAround(a, p);
+         },

 
 

-           operation.annotation = function() {
-               return _t('operations.disconnect.annotation.' + _annotationID);
-           };
+         /**
+          * Multiply this point by a 4x1 transformation matrix
+          * @param {Array<Number>} m transformation matrix
+          * @return {Point} output point
+          */
+         matMult: function matMult(m) {
+           return this.clone()._matMult(m);
+         },

 
 

+         /**
+          * Calculate this point but as a unit vector from 0, 0, meaning
+          * that the distance from the resulting point to the 0, 0
+          * coordinate will be equal to 1 and the angle from the resulting
+          * point to the 0, 0 coordinate will be the same as before.
+          * @return {Point} unit vector point
+          */
+         unit: function unit() {
+           return this.clone()._unit();
+         },

 
 

-           operation.id = 'disconnect';
-           operation.keys = [_t('operations.disconnect.key')];
-           operation.title = _t('operations.disconnect.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+         /**
+          * Compute a perpendicular point, where the new y coordinate
+          * is the old x coordinate and the new x coordinate is the old y
+          * coordinate multiplied by -1
+          * @return {Point} perpendicular point
+          */
+         perp: function perp() {
+           return this.clone()._perp();
+         },

 
 

-           return operation;
-       }
+         /**
+          * Return a version of this point with the x & y coordinates
+          * rounded to integers.
+          * @return {Point} rounded point
+          */
+         round: function round() {
+           return this.clone()._round();
+         },

 
 

-       function operationDowngrade(context, selectedIDs) {
-           var affectedFeatureCount = 0;
-           var downgradeType;
+         /**
+          * Return the magitude of this point: this is the Euclidean
+          * distance from the 0, 0 coordinate to this point's x and y
+          * coordinates.
+          * @return {Number} magnitude
+          */
+         mag: function mag() {
+           return Math.sqrt(this.x * this.x + this.y * this.y);
+         },

 
 

-           setDowngradeTypeForEntityIDs();
+         /**
+          * Judge whether this point is equal to another point, returning
+          * true or false.
+          * @param {Point} other the other point
+          * @return {boolean} whether the points are equal
+          */
+         equals: function equals(other) {
+           return this.x === other.x && this.y === other.y;
+         },

 
 

-           var multi = affectedFeatureCount === 1 ? 'single' : 'multiple';
+         /**
+          * Calculate the distance from this point to another point
+          * @param {Point} p the other point
+          * @return {Number} distance
+          */
+         dist: function dist(p) {
+           return Math.sqrt(this.distSqr(p));
+         },

 
 

-           function setDowngradeTypeForEntityIDs() {
-               for (var i in selectedIDs) {
-                   var entityID = selectedIDs[i];
-                   var type = downgradeTypeForEntityID(entityID);
-                   if (type) {
-                       affectedFeatureCount += 1;
-                       if (downgradeType && type !== downgradeType) {
-                           downgradeType = 'building_address';
-                       } else {
-                           downgradeType = type;
-                       }
-                   }
-               }
-           }
+         /**
+          * Calculate the distance from this point to another point,
+          * without the square root step. Useful if you're comparing
+          * relative distances.
+          * @param {Point} p the other point
+          * @return {Number} distance
+          */
+         distSqr: function distSqr(p) {
+           var dx = p.x - this.x,
+               dy = p.y - this.y;
+           return dx * dx + dy * dy;
+         },

 
 

-           function downgradeTypeForEntityID(entityID) {
-               var graph = context.graph();
-               var entity = graph.entity(entityID);
-               var preset = _mainPresetIndex.match(entity, graph);
+         /**
+          * Get the angle from the 0, 0 coordinate to this point, in radians
+          * coordinates.
+          * @return {Number} angle
+          */
+         angle: function angle() {
+           return Math.atan2(this.y, this.x);
+         },

 
 

-               if (!preset || preset.isFallback()) { return null; }
+         /**
+          * Get the angle from this point to another point, in radians
+          * @param {Point} b the other point
+          * @return {Number} angle
+          */
+         angleTo: function angleTo(b) {
+           return Math.atan2(this.y - b.y, this.x - b.x);
+         },

 
 

-               if (entity.type === 'node' &&
-                   preset.id !== 'address' &&
-                   Object.keys(entity.tags).some(function(key) {
-                       return key.match(/^addr:.{1,}/);
-                   })) {
+         /**
+          * Get the angle between this point and another point, in radians
+          * @param {Point} b the other point
+          * @return {Number} angle
+          */
+         angleWith: function angleWith(b) {
+           return this.angleWithSep(b.x, b.y);
+         },

 
 

-                   return 'address';
-               }
-               if (entity.geometry(graph) === 'area' &&
-                   entity.tags.building &&
-                   !preset.tags.building) {
+         /*
+          * Find the angle of the two vectors, solving the formula for
+          * the cross product a x b = |a||b|sin(θ) for θ.
+          * @param {Number} x the x-coordinate
+          * @param {Number} y the y-coordinate
+          * @return {Number} the angle in radians
+          */
+         angleWithSep: function angleWithSep(x, y) {
+           return Math.atan2(this.x * y - this.y * x, this.x * x + this.y * y);
+         },
+         _matMult: function _matMult(m) {
+           var x = m[0] * this.x + m[1] * this.y,
+               y = m[2] * this.x + m[3] * this.y;
+           this.x = x;
+           this.y = y;
+           return this;
+         },
+         _add: function _add(p) {
+           this.x += p.x;
+           this.y += p.y;
+           return this;
+         },
+         _sub: function _sub(p) {
+           this.x -= p.x;
+           this.y -= p.y;
+           return this;
+         },
+         _mult: function _mult(k) {
+           this.x *= k;
+           this.y *= k;
+           return this;
+         },
+         _div: function _div(k) {
+           this.x /= k;
+           this.y /= k;
+           return this;
+         },
+         _multByPoint: function _multByPoint(p) {
+           this.x *= p.x;
+           this.y *= p.y;
+           return this;
+         },
+         _divByPoint: function _divByPoint(p) {
+           this.x /= p.x;
+           this.y /= p.y;
+           return this;
+         },
+         _unit: function _unit() {
+           this._div(this.mag());

 
 

-                   return 'building';
-               }
+           return this;
+         },
+         _perp: function _perp() {
+           var y = this.y;
+           this.y = this.x;
+           this.x = -y;
+           return this;
+         },
+         _rotate: function _rotate(angle) {
+           var cos = Math.cos(angle),
+               sin = Math.sin(angle),
+               x = cos * this.x - sin * this.y,
+               y = sin * this.x + cos * this.y;
+           this.x = x;
+           this.y = y;
+           return this;
+         },
+         _rotateAround: function _rotateAround(angle, p) {
+           var cos = Math.cos(angle),
+               sin = Math.sin(angle),
+               x = p.x + cos * (this.x - p.x) - sin * (this.y - p.y),
+               y = p.y + sin * (this.x - p.x) + cos * (this.y - p.y);
+           this.x = x;
+           this.y = y;
+           return this;
+         },
+         _round: function _round() {
+           this.x = Math.round(this.x);
+           this.y = Math.round(this.y);
+           return this;
+         }
+       };
+       /**
+        * Construct a point from an array if necessary, otherwise if the input
+        * is already a Point, or an unknown type, return it unchanged
+        * @param {Array<Number>|Point|*} a any kind of input value
+        * @return {Point} constructed point, or passed-through value.
+        * @example
+        * // this
+        * var point = Point.convert([0, 1]);
+        * // is equivalent to
+        * var point = new Point(0, 1);
+        */

 
 

-               return null;
-           }
+       Point$1.convert = function (a) {
+         if (a instanceof Point$1) {
+           return a;
+         }

 
 

-           var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
-           var addressKeysToKeep = ['source'];
+         if (Array.isArray(a)) {
+           return new Point$1(a[0], a[1]);
+         }

 
 

-           var operation = function () {
-               context.perform(function(graph) {
+         return a;
+       };

 
 

-                   for (var i in selectedIDs) {
-                       var entityID = selectedIDs[i];
-                       var type = downgradeTypeForEntityID(entityID);
-                       if (!type) { continue; }
+       var Point = pointGeometry;
+       var vectortilefeature = VectorTileFeature$1;

 
 

-                       var tags = Object.assign({}, graph.entity(entityID).tags);  // shallow copy
-                       for (var key in tags) {
-                           if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) { continue; }
-                           if (type === 'building') {
-                               if (buildingKeysToKeep.indexOf(key) !== -1 ||
-                                   key.match(/^building:.{1,}/) ||
-                                   key.match(/^roof:.{1,}/)) { continue; }
-                           }
-                           // keep address tags for buildings too
-                           if (key.match(/^addr:.{1,}/)) { continue; }
+       function VectorTileFeature$1(pbf, end, extent, keys, values) {
+         // Public
+         this.properties = {};
+         this.extent = extent;
+         this.type = 0; // Private

 
 

-                           delete tags[key];
-                       }
-                       graph = actionChangeTags(entityID, tags)(graph);
-                   }
-                   return graph;
-               }, operation.annotation());
+         this._pbf = pbf;
+         this._geometry = -1;
+         this._keys = keys;
+         this._values = values;
+         pbf.readFields(readFeature, this, end);
+       }

 
 

-               context.validator().validate();
+       function readFeature(tag, feature, pbf) {
+         if (tag == 1) feature.id = pbf.readVarint();else if (tag == 2) readTag(pbf, feature);else if (tag == 3) feature.type = pbf.readVarint();else if (tag == 4) feature._geometry = pbf.pos;
+       }

 
 

-               // refresh the select mode to enable the delete operation
-               context.enter(modeSelect(context, selectedIDs));
-           };
+       function readTag(pbf, feature) {
+         var end = pbf.readVarint() + pbf.pos;

 
 

+         while (pbf.pos < end) {
+           var key = feature._keys[pbf.readVarint()],
+               value = feature._values[pbf.readVarint()];

 
 

-           operation.available = function () {
-               return downgradeType;
-           };
+           feature.properties[key] = value;
+         }
+       }

 
 

+       VectorTileFeature$1.types = ['Unknown', 'Point', 'LineString', 'Polygon'];

 
 

-           operation.disabled = function () {
-               if (selectedIDs.some(hasWikidataTag)) {
-                   return 'has_wikidata_tag';
-               }
-               return false;
+       VectorTileFeature$1.prototype.loadGeometry = function () {
+         var pbf = this._pbf;
+         pbf.pos = this._geometry;
+         var end = pbf.readVarint() + pbf.pos,
+             cmd = 1,
+             length = 0,
+             x = 0,
+             y = 0,
+             lines = [],
+             line;

 
 

-               function hasWikidataTag(id) {
-                   var entity = context.entity(id);
-                   return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-               }
-           };
+         while (pbf.pos < end) {
+           if (length <= 0) {
+             var cmdLen = pbf.readVarint();
+             cmd = cmdLen & 0x7;
+             length = cmdLen >> 3;
+           }

 
 

+           length--;

 
 

-           operation.tooltip = function () {
-               var disable = operation.disabled();
-               return disable ?
-                   _t('operations.downgrade.' + disable + '.' + multi) :
-                   _t('operations.downgrade.description.' + downgradeType);
-           };
+           if (cmd === 1 || cmd === 2) {
+             x += pbf.readSVarint();
+             y += pbf.readSVarint();

 
 

+             if (cmd === 1) {
+               // moveTo
+               if (line) lines.push(line);
+               line = [];
+             }

 
 

-           operation.annotation = function () {
-               var suffix;
-               if (downgradeType === 'building_address') {
-                   suffix = 'multiple';
-               } else {
-                   suffix = downgradeType + '.' + multi;
-               }
-               return _t('operations.downgrade.annotation.' + suffix, { n: affectedFeatureCount});
-           };
+             line.push(new Point(x, y));
+           } else if (cmd === 7) {
+             // Workaround for https://github.com/mapbox/mapnik-vector-tile/issues/90
+             if (line) {
+               line.push(line[0].clone()); // closePolygon
+             }
+           } else {
+             throw new Error('unknown command ' + cmd);
+           }
+         }

 
 

+         if (line) lines.push(line);
+         return lines;
+       };

 
 

-           operation.id = 'downgrade';
-           operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
-           operation.title = _t('operations.downgrade.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+       VectorTileFeature$1.prototype.bbox = function () {
+         var pbf = this._pbf;
+         pbf.pos = this._geometry;
+         var end = pbf.readVarint() + pbf.pos,
+             cmd = 1,
+             length = 0,
+             x = 0,
+             y = 0,
+             x1 = Infinity,
+             x2 = -Infinity,
+             y1 = Infinity,
+             y2 = -Infinity;

 
 

+         while (pbf.pos < end) {
+           if (length <= 0) {
+             var cmdLen = pbf.readVarint();
+             cmd = cmdLen & 0x7;
+             length = cmdLen >> 3;
+           }

 
 

-           return operation;
-       }
+           length--;

 
 

-       function operationExtract(context, selectedIDs) {
+           if (cmd === 1 || cmd === 2) {
+             x += pbf.readSVarint();
+             y += pbf.readSVarint();
+             if (x < x1) x1 = x;
+             if (x > x2) x2 = x;
+             if (y < y1) y1 = y;
+             if (y > y2) y2 = y;
+           } else if (cmd !== 7) {
+             throw new Error('unknown command ' + cmd);
+           }
+         }

 
 

-           var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
-           var _geometries = utilArrayUniq(selectedIDs.map(function(entityID) {
-               return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
-           }).filter(Boolean));
-           var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
+         return [x1, y1, x2, y2];
+       };

 
 

-           var _extent;
-           var _actions = selectedIDs.map(function(entityID) {
-               var graph = context.graph();
-               var entity = graph.hasEntity(entityID);
-               if (!entity || !entity.hasInterestingTags()) { return; }
+       VectorTileFeature$1.prototype.toGeoJSON = function (x, y, z) {
+         var size = this.extent * Math.pow(2, z),
+             x0 = this.extent * x,
+             y0 = this.extent * y,
+             coords = this.loadGeometry(),
+             type = VectorTileFeature$1.types[this.type],
+             i,
+             j;

 
 

-               if (entity.type === 'node' && graph.parentWays(entity).length === 0) { return; }
+         function project(line) {
+           for (var j = 0; j < line.length; j++) {
+             var p = line[j],
+                 y2 = 180 - (p.y + y0) * 360 / size;
+             line[j] = [(p.x + x0) * 360 / size - 180, 360 / Math.PI * Math.atan(Math.exp(y2 * Math.PI / 180)) - 90];
+           }
+         }

 
 

-               if (entity.type !== 'node') {
-                   var preset = _mainPresetIndex.match(entity, graph);
-                   // only allow extraction from ways/relations if the preset supports points
-                   if (preset.geometry.indexOf('point') === -1) { return; }
-               }
+         switch (this.type) {
+           case 1:
+             var points = [];

 
 

-               _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+             for (i = 0; i < coords.length; i++) {
+               points[i] = coords[i][0];
+             }

 
 

-               return actionExtract(entityID);
-           }).filter(Boolean);
+             coords = points;
+             project(coords);
+             break;

 
 

+           case 2:
+             for (i = 0; i < coords.length; i++) {
+               project(coords[i]);
+             }

 
 

-           var operation = function () {
-               var combinedAction = function(graph) {
-                   _actions.forEach(function(action) {
-                       graph = action(graph);
-                   });
-                   return graph;
-               };
-               context.perform(combinedAction, operation.annotation());  // do the extract
+             break;

 
 

-               var extractedNodeIDs = _actions.map(function(action) {
-                   return action.getExtractedNodeID();
-               });
-               context.enter(modeSelect(context, extractedNodeIDs));
-           };
+           case 3:
+             coords = classifyRings(coords);

 
 

+             for (i = 0; i < coords.length; i++) {
+               for (j = 0; j < coords[i].length; j++) {
+                 project(coords[i][j]);
+               }
+             }

 
 

-           operation.available = function () {
-               return _actions.length && selectedIDs.length === _actions.length;
-           };
+             break;
+         }

 
 

+         if (coords.length === 1) {
+           coords = coords[0];
+         } else {
+           type = 'Multi' + type;
+         }

 
 

-           operation.disabled = function () {
+         var result = {
+           type: "Feature",
+           geometry: {
+             type: type,
+             coordinates: coords
+           },
+           properties: this.properties
+         };

 
 

-               if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
-                   return 'too_large';
-               } else if (selectedIDs.some(function(entityID) {
-                   return context.graph().geometry(entityID) === 'vertex' && context.hasHiddenConnections(entityID);
-               })) {
-                   return 'connected_to_hidden';
-               }
+         if ('id' in this) {
+           result.id = this.id;
+         }

 
 

-               return false;
-           };
+         return result;
+       }; // classifies an array of rings into polygons with outer rings and holes

 
 
 
 

-           operation.tooltip = function () {
-               var disableReason = operation.disabled();
-               if (disableReason) {
-                   return _t('operations.extract.' + disableReason + '.' + _amount);
-               } else {
-                   return _t('operations.extract.description.' + _geometryID + '.' + _amount);
-               }
-           };
+       function classifyRings(rings) {
+         var len = rings.length;
+         if (len <= 1) return [rings];
+         var polygons = [],
+             polygon,
+             ccw;

 
 

+         for (var i = 0; i < len; i++) {
+           var area = signedArea(rings[i]);
+           if (area === 0) continue;
+           if (ccw === undefined) ccw = area < 0;

 
 

-           operation.annotation = function () {
-               return _t('operations.extract.annotation.' + _amount, { n: selectedIDs.length });
-           };
+           if (ccw === area < 0) {
+             if (polygon) polygons.push(polygon);
+             polygon = [rings[i]];
+           } else {
+             polygon.push(rings[i]);
+           }
+         }

 
 

+         if (polygon) polygons.push(polygon);
+         return polygons;
+       }

 
 

-           operation.id = 'extract';
-           operation.keys = [_t('operations.extract.key')];
-           operation.title = _t('operations.extract.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+       function signedArea(ring) {
+         var sum = 0;

 
 

+         for (var i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {
+           p1 = ring[i];
+           p2 = ring[j];
+           sum += (p2.x - p1.x) * (p1.y + p2.y);
+         }

 
 

-           return operation;
+         return sum;

        }
 
        }
 

-       function operationMerge(context, selectedIDs) {
+       var VectorTileFeature = vectortilefeature;
+       var vectortilelayer = VectorTileLayer$1;

 
 

-           var _action = getAction();
+       function VectorTileLayer$1(pbf, end) {
+         // Public
+         this.version = 1;
+         this.name = null;
+         this.extent = 4096;
+         this.length = 0; // Private

 
 

-           function getAction() {
-               // prefer a non-disabled action first
-               var join = actionJoin(selectedIDs);
-               if (!join.disabled(context.graph())) { return join; }
+         this._pbf = pbf;
+         this._keys = [];
+         this._values = [];
+         this._features = [];
+         pbf.readFields(readLayer, this, end);
+         this.length = this._features.length;
+       }

 
 

-               var merge = actionMerge(selectedIDs);
-               if (!merge.disabled(context.graph())) { return merge; }
+       function readLayer(tag, layer, pbf) {
+         if (tag === 15) layer.version = pbf.readVarint();else if (tag === 1) layer.name = pbf.readString();else if (tag === 5) layer.extent = pbf.readVarint();else if (tag === 2) layer._features.push(pbf.pos);else if (tag === 3) layer._keys.push(pbf.readString());else if (tag === 4) layer._values.push(readValueMessage(pbf));
+       }

 
 

-               var mergePolygon = actionMergePolygon(selectedIDs);
-               if (!mergePolygon.disabled(context.graph())) { return mergePolygon; }
+       function readValueMessage(pbf) {
+         var value = null,
+             end = pbf.readVarint() + pbf.pos;

 
 

-               var mergeNodes = actionMergeNodes(selectedIDs);
-               if (!mergeNodes.disabled(context.graph())) { return mergeNodes; }
+         while (pbf.pos < end) {
+           var tag = pbf.readVarint() >> 3;
+           value = tag === 1 ? pbf.readString() : tag === 2 ? pbf.readFloat() : tag === 3 ? pbf.readDouble() : tag === 4 ? pbf.readVarint64() : tag === 5 ? pbf.readVarint() : tag === 6 ? pbf.readSVarint() : tag === 7 ? pbf.readBoolean() : null;
+         }

 
 

-               // otherwise prefer an action with an interesting disabled reason
-               if (join.disabled(context.graph()) !== 'not_eligible') { return join; }
-               if (merge.disabled(context.graph()) !== 'not_eligible') { return merge; }
-               if (mergePolygon.disabled(context.graph()) !== 'not_eligible') { return mergePolygon; }
+         return value;
+       } // return feature `i` from this layer as a `VectorTileFeature`

 
 

-               return mergeNodes;
-           }

 
 

-           var operation = function() {
+       VectorTileLayer$1.prototype.feature = function (i) {
+         if (i < 0 || i >= this._features.length) throw new Error('feature index out of bounds');
+         this._pbf.pos = this._features[i];

 
 

-               if (operation.disabled()) { return; }
+         var end = this._pbf.readVarint() + this._pbf.pos;

 
 

-               context.perform(_action, operation.annotation());
+         return new VectorTileFeature(this._pbf, end, this.extent, this._keys, this._values);
+       };

 
 

-               context.validator().validate();
+       var VectorTileLayer = vectortilelayer;
+       var vectortile = VectorTile$1;

 
 

-               var resultIDs = selectedIDs.filter(context.hasEntity);
-               if (resultIDs.length > 1) {
-                   var interestingIDs = resultIDs.filter(function(id) {
-                       return context.entity(id).hasInterestingTags();
-                   });
-                   if (interestingIDs.length) { resultIDs = interestingIDs; }
-               }
-               context.enter(modeSelect(context, resultIDs));
-           };
+       function VectorTile$1(pbf, end) {
+         this.layers = pbf.readFields(readTile, {}, end);
+       }

 
 

-           operation.available = function() {
-               return selectedIDs.length >= 2;
-           };
+       function readTile(tag, layers, pbf) {
+         if (tag === 3) {
+           var layer = new VectorTileLayer(pbf, pbf.readVarint() + pbf.pos);
+           if (layer.length) layers[layer.name] = layer;
+         }
+       }

 
 

-           operation.disabled = function() {
-               var actionDisabled = _action.disabled(context.graph());
-               if (actionDisabled) { return actionDisabled; }
+       var VectorTile = vectorTile.VectorTile = vectortile;
+       vectorTile.VectorTileFeature = vectortilefeature;
+       vectorTile.VectorTileLayer = vectortilelayer;

 
 

-               var osm = context.connection();
-               if (osm &&
-                   _action.resultingWayNodesLength &&
-                   _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
-                   return 'too_many_vertices';
-               }
+       var accessToken = 'MLY|4100327730013843|5bb78b81720791946a9a7b956c57b7cf';
+       var apiUrl = 'https://graph.mapillary.com/';
+       var baseTileUrl = 'https://tiles.mapillary.com/maps/vtp';
+       var mapFeatureTileUrl = "".concat(baseTileUrl, "/mly_map_feature_point/2/{z}/{x}/{y}?access_token=").concat(accessToken);
+       var tileUrl = "".concat(baseTileUrl, "/mly1_public/2/{z}/{x}/{y}?access_token=").concat(accessToken);
+       var trafficSignTileUrl = "".concat(baseTileUrl, "/mly_map_feature_traffic_sign/2/{z}/{x}/{y}?access_token=").concat(accessToken);
+       var viewercss = 'mapillary-js/mapillary.css';
+       var viewerjs = 'mapillary-js/mapillary.js';
+       var minZoom$1 = 14;
+       var dispatch$4 = dispatch$8('change', 'loadedImages', 'loadedSigns', 'loadedMapFeatures', 'bearingChanged', 'imageChanged');

 
 

-               return false;
-           };
+       var _loadViewerPromise$2;

 
 

-           operation.tooltip = function() {
-               var disabled = operation.disabled();
-               if (disabled) {
-                   if (disabled === 'restriction') {
-                       return _t('operations.merge.restriction',
-                           { relation: _mainPresetIndex.item('type/restriction').name() });
-                   }
-                   return _t('operations.merge.' + disabled);
-               }
-               return _t('operations.merge.description');
-           };
+       var _mlyActiveImage;

 
 

-           operation.annotation = function() {
-               return _t('operations.merge.annotation', { n: selectedIDs.length });
-           };
+       var _mlyCache;

 
 

-           operation.id = 'merge';
-           operation.keys = [_t('operations.merge.key')];
-           operation.title = _t('operations.merge.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+       var _mlyFallback = false;

 
 

-           return operation;
-       }
+       var _mlyHighlightedDetection;

 
 

-       // see also `behaviorPaste`
-       function operationPaste(context) {
+       var _mlyShowFeatureDetections = false;
+       var _mlyShowSignDetections = false;

 
 

-           var _pastePoint;
+       var _mlyViewer;

 
 

-           var operation = function() {
+       var _mlyViewerFilter = ['all']; // Load all data for the specified type from Mapillary vector tiles

 
 

-               if (!_pastePoint) { return; }
+       function loadTiles$2(which, url, maxZoom, projection) {
+         var tiler = utilTiler().zoomExtent([minZoom$1, maxZoom]).skipNullIsland(true);
+         var tiles = tiler.getTiles(projection);
+         tiles.forEach(function (tile) {
+           loadTile$1(which, url, tile);
+         });
+       } // Load all data for the specified type from one vector tile
+
+
+       function loadTile$1(which, url, tile) {
+         var cache = _mlyCache.requests;
+         var tileId = "".concat(tile.id, "-").concat(which);
+         if (cache.loaded[tileId] || cache.inflight[tileId]) return;
+         var controller = new AbortController();
+         cache.inflight[tileId] = controller;
+         var requestUrl = url.replace('{x}', tile.xyz[0]).replace('{y}', tile.xyz[1]).replace('{z}', tile.xyz[2]);
+         fetch(requestUrl, {
+           signal: controller.signal
+         }).then(function (response) {
+           if (!response.ok) {
+             throw new Error(response.status + ' ' + response.statusText);
+           }
+
+           cache.loaded[tileId] = true;
+           delete cache.inflight[tileId];
+           return response.arrayBuffer();
+         }).then(function (data) {
+           if (!data) {
+             throw new Error('No Data');
+           }
+
+           loadTileDataToCache(data, tile, which);
+
+           if (which === 'images') {
+             dispatch$4.call('loadedImages');
+           } else if (which === 'signs') {
+             dispatch$4.call('loadedSigns');
+           } else if (which === 'points') {
+             dispatch$4.call('loadedMapFeatures');
+           }
+         })["catch"](function () {
+           cache.loaded[tileId] = true;
+           delete cache.inflight[tileId];
+         });
+       } // Load the data from the vector tile into cache

 
 

-               var oldIDs = context.copyIDs();
-               if (!oldIDs.length) { return; }

 
 

-               var projection = context.projection;
-               var extent = geoExtent();
-               var oldGraph = context.copyGraph();
-               var newIDs = [];
+       function loadTileDataToCache(data, tile, which) {
+         var vectorTile = new VectorTile(new pbf(data));
+         var features, cache, layer, i, feature, loc, d;

 
 

-               var action = actionCopyEntities(oldIDs, oldGraph);
-               context.perform(action);
+         if (vectorTile.layers.hasOwnProperty('image')) {
+           features = [];
+           cache = _mlyCache.images;
+           layer = vectorTile.layers.image;

 
 

-               var copies = action.copies();
-               var originals = new Set();
-               Object.values(copies).forEach(function(entity) { originals.add(entity.id); });
+           for (i = 0; i < layer.length; i++) {
+             feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+             loc = feature.geometry.coordinates;
+             d = {
+               loc: loc,
+               captured_at: feature.properties.captured_at,
+               ca: feature.properties.compass_angle,
+               id: feature.properties.id,
+               is_pano: feature.properties.is_pano,
+               sequence_id: feature.properties.sequence_id
+             };
+             cache.forImageId[d.id] = d;
+             features.push({
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
+             });
+           }

 
 

-               for (var id in copies) {
-                   var oldEntity = oldGraph.entity(id);
-                   var newEntity = copies[id];
+           if (cache.rtree) {
+             cache.rtree.load(features);
+           }
+         }

 
 

-                   extent._extend(oldEntity.extent(oldGraph));
+         if (vectorTile.layers.hasOwnProperty('sequence')) {
+           features = [];
+           cache = _mlyCache.sequences;
+           layer = vectorTile.layers.sequence;

 
 

-                   // Exclude child nodes from newIDs if their parent way was also copied.
-                   var parents = context.graph().parentWays(newEntity);
-                   var parentCopied = parents.some(function(parent) {
-                       return originals.has(parent.id);
-                   });
+           for (i = 0; i < layer.length; i++) {
+             feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);

 
 

-                   if (!parentCopied) {
-                       newIDs.push(newEntity.id);
-                   }
-               }
+             if (cache.lineString[feature.properties.id]) {
+               cache.lineString[feature.properties.id].push(feature);
+             } else {
+               cache.lineString[feature.properties.id] = [feature];
+             }
+           }
+         }

 
 

-               // Use the location of the copy operation to offset the paste location,
-               // or else use the center of the pasted extent
-               var copyPoint = (context.copyLonLat() && projection(context.copyLonLat())) ||
-                   projection(extent.center());
-               var delta = geoVecSubtract(_pastePoint, copyPoint);
+         if (vectorTile.layers.hasOwnProperty('point')) {
+           features = [];
+           cache = _mlyCache[which];
+           layer = vectorTile.layers.point;

 
 

-               // Move the pasted objects to be anchored at the paste location
-               context.replace(actionMove(newIDs, delta, projection), operation.annotation());
-               context.enter(modeSelect(context, newIDs));
-           };
+           for (i = 0; i < layer.length; i++) {
+             feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+             loc = feature.geometry.coordinates;
+             d = {
+               loc: loc,
+               id: feature.properties.id,
+               first_seen_at: feature.properties.first_seen_at,
+               last_seen_at: feature.properties.last_seen_at,
+               value: feature.properties.value
+             };
+             features.push({
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
+             });
+           }

 
 

-           operation.point = function(val) {
-               _pastePoint = val;
-               return operation;
-           };
+           if (cache.rtree) {
+             cache.rtree.load(features);
+           }
+         }

 
 

-           operation.available = function() {
-               return context.mode().id === 'browse';
-           };
+         if (vectorTile.layers.hasOwnProperty('traffic_sign')) {
+           features = [];
+           cache = _mlyCache[which];
+           layer = vectorTile.layers.traffic_sign;

 
 

-           operation.disabled = function() {
-               return !context.copyIDs().length;
-           };
+           for (i = 0; i < layer.length; i++) {
+             feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+             loc = feature.geometry.coordinates;
+             d = {
+               loc: loc,
+               id: feature.properties.id,
+               first_seen_at: feature.properties.first_seen_at,
+               last_seen_at: feature.properties.last_seen_at,
+               value: feature.properties.value
+             };
+             features.push({
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
+             });
+           }

 
 

-           operation.tooltip = function() {
-               var oldGraph = context.copyGraph();
-               var ids = context.copyIDs();
-               if (!ids.length) {
-                   return _t('operations.paste.nothing_copied');
-               }
-               return ids.length === 1 ?
-                   _t('operations.paste.description.single', { feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph) }) :
-                   _t('operations.paste.description.multiple', { n: ids.length.toString() });
-           };
+           if (cache.rtree) {
+             cache.rtree.load(features);
+           }
+         }
+       } // Get data from the API

 
 

-           operation.annotation = function() {
-               var ids = context.copyIDs();
-               return ids.length === 1 ?
-                   _t('operations.paste.annotation.single') :
-                   _t('operations.paste.annotation.multiple', { n: ids.length.toString() });
-           };

 
 

-           operation.id = 'paste';
-           operation.keys = [uiCmd('⌘V')];
-           operation.title = _t('operations.paste.title');
+       function loadData(url) {
+         return fetch(url).then(function (response) {
+           if (!response.ok) {
+             throw new Error(response.status + ' ' + response.statusText);
+           }

 
 

-           return operation;
-       }
+           return response.json();
+         }).then(function (result) {
+           if (!result) {
+             return [];
+           }

 
 

-       function operationReverse(context, selectedIDs) {
+           return result.data || [];
+         });
+       } // Partition viewport into higher zoom tiles

 
 

-           var operation = function() {
-               context.perform(function combinedReverseAction(graph) {
-                   actions().forEach(function(action) {
-                       graph = action(graph);
-                   });
-                   return graph;
-               }, operation.annotation());
-               context.validator().validate();
-           };

 
 

-           function actions(situation) {
-               return selectedIDs.map(function(entityID) {
-                   var entity = context.hasEntity(entityID);
-                   if (!entity) { return; }
+       function partitionViewport$2(projection) {
+         var z = geoScaleToZoom(projection.scale());
+         var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5

 
 

-                   if (situation === 'toolbar') {
-                       if (entity.type === 'way' &&
-                           (!entity.isOneWay() && !entity.isSided())) { return; }
-                   }
+         var tiler = utilTiler().zoomExtent([z2, z2]);
+         return tiler.getTiles(projection).map(function (tile) {
+           return tile.extent;
+         });
+       } // Return no more than `limit` results per partition.

 
 

-                   var geometry = entity.geometry(context.graph());
-                   if (entity.type !== 'node' && geometry !== 'line') { return; }

 
 

-                   var action = actionReverse(entityID);
-                   if (action.disabled(context.graph())) { return; }
+       function searchLimited$2(limit, projection, rtree) {
+         limit = limit || 5;
+         return partitionViewport$2(projection).reduce(function (result, extent) {
+           var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+             return d.data;
+           });
+           return found.length ? result.concat(found) : result;
+         }, []);
+       }

 
 

-                   return action;
-               }).filter(Boolean);
+       var serviceMapillary = {
+         // Initialize Mapillary
+         init: function init() {
+           if (!_mlyCache) {
+             this.reset();

            }
 
            }
 

-           function reverseTypeID() {
-               var acts = actions();
-               var nodeActionCount = acts.filter(function(act) {
-                   var entity = context.hasEntity(act.entityID());
-                   return entity && entity.type === 'node';
-               }).length;
-               var typeID = nodeActionCount === 0 ? 'line' : (nodeActionCount === acts.length ? 'point' : 'features');
-               if (typeID !== 'features' && acts.length > 1) { typeID += 's'; }
-               return typeID;
+           this.event = utilRebind(this, dispatch$4, 'on');
+         },
+         // Reset cache and state
+         reset: function reset() {
+           if (_mlyCache) {
+             Object.values(_mlyCache.requests.inflight).forEach(function (request) {
+               request.abort();
+             });

            }
 
            }
 

-
-           operation.available = function(situation) {
-               return actions(situation).length > 0;
+           _mlyCache = {
+             images: {
+               rtree: new RBush(),
+               forImageId: {}
+             },
+             image_detections: {
+               forImageId: {}
+             },
+             signs: {
+               rtree: new RBush()
+             },
+             points: {
+               rtree: new RBush()
+             },
+             sequences: {
+               rtree: new RBush(),
+               lineString: {}
+             },
+             requests: {
+               loaded: {},
+               inflight: {}
+             }

            };
            };

+           _mlyActiveImage = null;
+         },
+         // Get visible images
+         images: function images(projection) {
+           var limit = 5;
+           return searchLimited$2(limit, projection, _mlyCache.images.rtree);
+         },
+         // Get visible traffic signs
+         signs: function signs(projection) {
+           var limit = 5;
+           return searchLimited$2(limit, projection, _mlyCache.signs.rtree);
+         },
+         // Get visible map (point) features
+         mapFeatures: function mapFeatures(projection) {
+           var limit = 5;
+           return searchLimited$2(limit, projection, _mlyCache.points.rtree);
+         },
+         // Get cached image by id
+         cachedImage: function cachedImage(imageId) {
+           return _mlyCache.images.forImageId[imageId];
+         },
+         // Get visible sequences
+         sequences: function sequences(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           var sequenceIds = {};
+           var lineStrings = [];

 
 

+           _mlyCache.images.rtree.search(bbox).forEach(function (d) {
+             if (d.data.sequence_id) {
+               sequenceIds[d.data.sequence_id] = true;
+             }
+           });

 
 

-           operation.disabled = function() {
-               return false;
-           };
+           Object.keys(sequenceIds).forEach(function (sequenceId) {
+             if (_mlyCache.sequences.lineString[sequenceId]) {
+               lineStrings = lineStrings.concat(_mlyCache.sequences.lineString[sequenceId]);
+             }
+           });
+           return lineStrings;
+         },
+         // Load images in the visible area
+         loadImages: function loadImages(projection) {
+           loadTiles$2('images', tileUrl, 14, projection);
+         },
+         // Load traffic signs in the visible area
+         loadSigns: function loadSigns(projection) {
+           loadTiles$2('signs', trafficSignTileUrl, 14, projection);
+         },
+         // Load map (point) features in the visible area
+         loadMapFeatures: function loadMapFeatures(projection) {
+           loadTiles$2('points', mapFeatureTileUrl, 14, projection);
+         },
+         // Return a promise that resolves when the image viewer (Mapillary JS) library has finished loading
+         ensureViewerLoaded: function ensureViewerLoaded(context) {
+           if (_loadViewerPromise$2) return _loadViewerPromise$2; // add mly-wrapper

 
 

+           var wrap = context.container().select('.photoviewer').selectAll('.mly-wrapper').data([0]);
+           wrap.enter().append('div').attr('id', 'ideditor-mly').attr('class', 'photo-wrapper mly-wrapper').classed('hide', true);
+           var that = this;
+           _loadViewerPromise$2 = new Promise(function (resolve, reject) {
+             var loadedCount = 0;

 
 

-           operation.tooltip = function() {
-               return _t('operations.reverse.description.' + reverseTypeID());
-           };
+             function loaded() {
+               loadedCount += 1; // wait until both files are loaded

 
 

+               if (loadedCount === 2) resolve();
+             }

 
 

-           operation.annotation = function() {
-               return _t('operations.reverse.annotation.' + reverseTypeID());
-           };
+             var head = select('head'); // load mapillary-viewercss

 
 

+             head.selectAll('#ideditor-mapillary-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-mapillary-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(viewercss)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
+               reject();
+             }); // load mapillary-viewerjs

 
 

-           operation.id = 'reverse';
-           operation.keys = [_t('operations.reverse.key')];
-           operation.title = _t('operations.reverse.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+             head.selectAll('#ideditor-mapillary-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-mapillary-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(viewerjs)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
+               reject();
+             });
+           })["catch"](function () {
+             _loadViewerPromise$2 = null;
+           }).then(function () {
+             that.initViewer(context);
+           });
+           return _loadViewerPromise$2;
+         },
+         // Load traffic sign image sprites
+         loadSignResources: function loadSignResources(context) {
+           context.ui().svgDefs.addSprites(['mapillary-sprite'], false
+           /* don't override colors */
+           );
+           return this;
+         },
+         // Load map (point) feature image sprites
+         loadObjectResources: function loadObjectResources(context) {
+           context.ui().svgDefs.addSprites(['mapillary-object-sprite'], false
+           /* don't override colors */
+           );
+           return this;
+         },
+         // Remove previous detections in image viewer
+         resetTags: function resetTags() {
+           if (_mlyViewer && !_mlyFallback) {
+             _mlyViewer.getComponent('tag').removeAll();
+           }
+         },
+         // Show map feature detections in image viewer
+         showFeatureDetections: function showFeatureDetections(value) {
+           _mlyShowFeatureDetections = value;

 
 

-           return operation;
-       }
+           if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+             this.resetTags();
+           }
+         },
+         // Show traffic sign detections in image viewer
+         showSignDetections: function showSignDetections(value) {
+           _mlyShowSignDetections = value;

 
 

-       function operationSplit(context, selectedIDs) {
-           var vertices = selectedIDs
-               .filter(function(id) { return context.graph().geometry(id) === 'vertex'; });
-           var entityID = vertices[0];
-           var action = actionSplit(entityID);
-           var ways = [];
+           if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+             this.resetTags();
+           }
+         },
+         // Apply filter to image viewer
+         filterViewer: function filterViewer(context) {
+           var showsPano = context.photos().showsPanoramic();
+           var showsFlat = context.photos().showsFlat();
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var filter = ['all'];
+           if (!showsPano) filter.push(['!=', 'cameraType', 'spherical']);
+           if (!showsFlat && showsPano) filter.push(['==', 'pano', true]);

 
 

-           if (vertices.length === 1) {
-               if (entityID && selectedIDs.length > 1) {
-                   var ids = selectedIDs.filter(function(id) { return id !== entityID; });
-                   action.limitWays(ids);
-               }
-               ways = action.ways(context.graph());
+           if (fromDate) {
+             filter.push(['>=', 'capturedAt', new Date(fromDate).getTime()]);

            }
 
            }
 

+           if (toDate) {
+             filter.push(['>=', 'capturedAt', new Date(toDate).getTime()]);
+           }

 
 

-           var operation = function() {
-               var difference = context.perform(action, operation.annotation());
-               context.enter(modeSelect(context, difference.extantIDs()));
-           };
+           if (_mlyViewer) {
+             _mlyViewer.setFilter(filter);
+           }

 
 

+           _mlyViewerFilter = filter;
+           return filter;
+         },
+         // Make the image viewer visible
+         showViewer: function showViewer(context) {
+           var wrap = context.container().select('.photoviewer').classed('hide', false);
+           var isHidden = wrap.selectAll('.photo-wrapper.mly-wrapper.hide').size();

 
 

-           operation.available = function() {
-               return vertices.length === 1;
-           };
+           if (isHidden && _mlyViewer) {
+             wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
+             wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);

 
 

+             _mlyViewer.resize();
+           }

 
 

-           operation.disabled = function() {
-               var reason = action.disabled(context.graph());
-               if (reason) {
-                   return reason;
-               } else if (selectedIDs.some(context.hasHiddenConnections)) {
-                   return 'connected_to_hidden';
-               }
+           return this;
+         },
+         // Hide the image viewer and resets map markers
+         hideViewer: function hideViewer(context) {
+           _mlyActiveImage = null;

 
 

-               return false;
-           };
+           if (!_mlyFallback && _mlyViewer) {
+             _mlyViewer.getComponent('sequence').stop();
+           }

 
 

+           var viewer = context.container().select('.photoviewer');
+           if (!viewer.empty()) viewer.datum(null);
+           viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+           this.updateUrlImage(null);
+           dispatch$4.call('imageChanged');
+           dispatch$4.call('loadedMapFeatures');
+           dispatch$4.call('loadedSigns');
+           return this.setStyles(context, null);
+         },
+         // Update the URL with current image id
+         updateUrlImage: function updateUrlImage(imageId) {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);

 
 

-           operation.tooltip = function() {
-               var disable = operation.disabled();
-               if (disable) {
-                   return _t('operations.split.' + disable);
-               } else if (ways.length === 1) {
-                   return _t('operations.split.description.' + context.graph().geometry(ways[0].id));
-               } else {
-                   return _t('operations.split.description.multiple');
-               }
-           };
+             if (imageId) {
+               hash.photo = 'mapillary/' + imageId;
+             } else {
+               delete hash.photo;
+             }

 
 

+             window.location.replace('#' + utilQsString(hash, true));
+           }
+         },
+         // Highlight the detection in the viewer that is related to the clicked map feature
+         highlightDetection: function highlightDetection(detection) {
+           if (detection) {
+             _mlyHighlightedDetection = detection.id;
+           }

 
 

-           operation.annotation = function() {
-               return ways.length === 1 ?
-                   _t('operations.split.annotation.' + context.graph().geometry(ways[0].id)) :
-                   _t('operations.split.annotation.multiple', { n: ways.length });
-           };
+           return this;
+         },
+         // Initialize image viewer (Mapillar JS)
+         initViewer: function initViewer(context) {
+           var that = this;
+           if (!window.mapillary) return;
+           var opts = {
+             accessToken: accessToken,
+             component: {
+               cover: false,
+               keyboard: false,
+               tag: true
+             },
+             container: 'ideditor-mly'
+           }; // Disable components requiring WebGL support
+
+           if (!mapillary.isSupported() && mapillary.isFallbackSupported()) {
+             _mlyFallback = true;
+             opts.component = {
+               cover: false,
+               direction: false,
+               imagePlane: false,
+               keyboard: false,
+               mouse: false,
+               sequence: false,
+               tag: false,
+               image: true,
+               // fallback
+               navigation: true // fallback

 
 

+             };
+           }

 
 

-           operation.id = 'split';
-           operation.keys = [_t('operations.split.key')];
-           operation.title = _t('operations.split.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+           _mlyViewer = new mapillary.Viewer(opts);

 
 

-           return operation;
-       }
+           _mlyViewer.on('image', imageChanged);

 
 

-       function operationStraighten(context, selectedIDs) {
-           var _wayIDs = selectedIDs.filter(function(id) { return id.charAt(0) === 'w'; });
-           var _nodeIDs = selectedIDs.filter(function(id) { return id.charAt(0) === 'n'; });
-           var _amount = ((_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple');
-
-           var _nodes = utilGetAllNodes(selectedIDs, context.graph());
-           var _coords = _nodes.map(function(n) { return n.loc; });
-           var _extent = utilTotalExtent(selectedIDs, context.graph());
-           var _action = chooseAction();
-           var _geometry;
-
-
-           function chooseAction() {
-               // straighten selected nodes
-               if (_wayIDs.length === 0 && _nodeIDs.length > 2) {
-                   _geometry = 'points';
-                   return actionStraightenNodes(_nodeIDs, context.projection);
-
-               // straighten selected ways (possibly between range of 2 selected nodes)
-               } else if (_wayIDs.length > 0 && (_nodeIDs.length === 0 || _nodeIDs.length === 2)) {
-                   var startNodeIDs = [];
-                   var endNodeIDs = [];
-
-                   for (var i = 0; i < selectedIDs.length; i++) {
-                       var entity = context.entity(selectedIDs[i]);
-                       if (entity.type === 'node') {
-                           continue;
-                       } else if (entity.type !== 'way' || entity.isClosed()) {
-                           return null;  // exit early, can't straighten these
-                       }
+           _mlyViewer.on('bearing', bearingChanged);

 
 

-                       startNodeIDs.push(entity.first());
-                       endNodeIDs.push(entity.last());
-                   }
+           if (_mlyViewerFilter) {
+             _mlyViewer.setFilter(_mlyViewerFilter);
+           } // Register viewer resize handler

 
 

-                   // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
-                   startNodeIDs = startNodeIDs.filter(function(n) {
-                       return startNodeIDs.indexOf(n) === startNodeIDs.lastIndexOf(n);
-                   });
-                   endNodeIDs = endNodeIDs.filter(function(n) {
-                       return endNodeIDs.indexOf(n) === endNodeIDs.lastIndexOf(n);
-                   });

 
 

-                   // Ensure all ways are connected (i.e. only 2 unique endpoints/startpoints)
-                   if (utilArrayDifference(startNodeIDs, endNodeIDs).length +
-                       utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) { return null; }
+           context.ui().photoviewer.on('resize.mapillary', function () {
+             if (_mlyViewer) _mlyViewer.resize();
+           }); // imageChanged: called after the viewer has changed images and is ready.

 
 

-                   // Ensure path contains at least 3 unique nodes
-                   var wayNodeIDs = utilGetAllNodes(_wayIDs, context.graph())
-                       .map(function(node) { return node.id; });
-                   if (wayNodeIDs.length <= 2) { return null; }
+           function imageChanged(node) {
+             that.resetTags();
+             var image = node.image;
+             that.setActiveImage(image);
+             that.setStyles(context, null);
+             var loc = [image.originalLngLat.lng, image.originalLngLat.lat];
+             context.map().centerEase(loc);
+             that.updateUrlImage(image.id);

 
 

-                   // If range of 2 selected nodes is supplied, ensure nodes lie on the selected path
-                   if (_nodeIDs.length === 2 && (
-                       wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1
-                   )) { return null; }
+             if (_mlyShowFeatureDetections || _mlyShowSignDetections) {
+               that.updateDetections(image.id, "".concat(apiUrl, "/").concat(image.id, "/detections?access_token=").concat(accessToken, "&fields=id,image,geometry,value"));
+             }

 
 

-                   if (_nodeIDs.length) {
-                       // If we're only straightenting between two points, we only need that extent visible
-                       _extent = utilTotalExtent(_nodeIDs, context.graph());
-                   }
+             dispatch$4.call('imageChanged');
+           } // bearingChanged: called when the bearing changes in the image viewer.

 
 

-                   _geometry = _wayIDs.length === 1 ? 'line' : 'lines';
-                   return actionStraightenWay(selectedIDs, context.projection);
-               }

 
 

-               return null;
+           function bearingChanged(e) {
+             dispatch$4.call('bearingChanged', undefined, e);
+           }
+         },
+         // Move to an image
+         selectImage: function selectImage(context, imageId) {
+           if (_mlyViewer && imageId) {
+             _mlyViewer.moveTo(imageId)["catch"](function (e) {
+               console.error('mly3', e); // eslint-disable-line no-console
+             });

            }
 
            }
 

-
-           function operation() {
-               if (!_action) { return; }
-
-               context.perform(_action, operation.annotation());
-
-               window.setTimeout(function() {
-                   context.validator().validate();
-               }, 300);  // after any transition
+           return this;
+         },
+         // Return the currently displayed image
+         getActiveImage: function getActiveImage() {
+           return _mlyActiveImage;
+         },
+         // Return a list of detection objects for the given id
+         getDetections: function getDetections(id) {
+           return loadData("".concat(apiUrl, "/").concat(id, "/detections?access_token=").concat(accessToken, "&fields=id,value,image"));
+         },
+         // Set the currently visible image
+         setActiveImage: function setActiveImage(image) {
+           if (image) {
+             _mlyActiveImage = {
+               ca: image.originalCompassAngle,
+               id: image.id,
+               loc: [image.originalLngLat.lng, image.originalLngLat.lat],
+               is_pano: image.cameraType === 'spherical',
+               sequence_id: image.sequenceId
+             };
+           } else {
+             _mlyActiveImage = null;

            }
            }

+         },
+         // Update the currently highlighted sequence and selected bubble.
+         setStyles: function setStyles(context, hovered) {
+           var hoveredImageId = hovered && hovered.id;
+           var hoveredSequenceId = hovered && hovered.sequence_id;
+           var selectedSequenceId = _mlyActiveImage && _mlyActiveImage.sequence_id;
+           context.container().selectAll('.layer-mapillary .viewfield-group').classed('highlighted', function (d) {
+             return d.sequence_id === selectedSequenceId || d.id === hoveredImageId;
+           }).classed('hovered', function (d) {
+             return d.id === hoveredImageId;
+           });
+           context.container().selectAll('.layer-mapillary .sequence').classed('highlighted', function (d) {
+             return d.properties.id === hoveredSequenceId;
+           }).classed('currentView', function (d) {
+             return d.properties.id === selectedSequenceId;
+           });
+           return this;
+         },
+         // Get detections for the current image and shows them in the image viewer
+         updateDetections: function updateDetections(imageId, url) {
+           if (!_mlyViewer || _mlyFallback) return;
+           if (!imageId) return;
+           var cache = _mlyCache.image_detections;
+
+           if (cache.forImageId[imageId]) {
+             showDetections(_mlyCache.image_detections.forImageId[imageId]);
+           } else {
+             loadData(url).then(function (detections) {
+               detections.forEach(function (detection) {
+                 if (!cache.forImageId[imageId]) {
+                   cache.forImageId[imageId] = [];
+                 }

 
 

+                 cache.forImageId[imageId].push({
+                   geometry: detection.geometry,
+                   id: detection.id,
+                   image_id: imageId,
+                   value: detection.value
+                 });
+               });
+               showDetections(_mlyCache.image_detections.forImageId[imageId] || []);
+             });
+           } // Create a tag for each detection and shows it in the image viewer

 
 

-           operation.available = function() {
-               return Boolean(_action);
-           };

 
 

+           function showDetections(detections) {
+             var tagComponent = _mlyViewer.getComponent('tag');

 
 

-           operation.disabled = function() {
-               var reason = _action.disabled(context.graph());
-               if (reason) {
-                   return reason;
-               } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
-                   return 'too_large';
-               } else if (someMissing()) {
-                   return 'not_downloaded';
-               } else if (selectedIDs.some(context.hasHiddenConnections)) {
-                   return 'connected_to_hidden';
-               }
+             detections.forEach(function (data) {
+               var tag = makeTag(data);

 
 

-               return false;
+               if (tag) {
+                 tagComponent.add([tag]);
+               }
+             });
+           } // Create a Mapillary JS tag object

 
 
 
 

-               function someMissing() {
-                   if (context.inIntro()) { return false; }
-                   var osm = context.connection();
-                   if (osm) {
-                       var missing = _coords.filter(function(loc) { return !osm.isDataLoaded(loc); });
-                       if (missing.length) {
-                           missing.forEach(function(loc) { context.loadTileAtLoc(loc); });
-                           return true;
-                       }
-                   }
-                   return false;
-               }
-           };
+           function makeTag(data) {
+             var valueParts = data.value.split('--');
+             if (!valueParts.length) return;
+             var tag;
+             var text;
+             var color = 0xffffff;

 
 

+             if (_mlyHighlightedDetection === data.id) {
+               color = 0xffff00;
+               text = valueParts[1];

 
 

-           operation.tooltip = function() {
-               var disable = operation.disabled();
-               return disable ?
-                   _t('operations.straighten.' + disable + '.' + _amount) :
-                   _t('operations.straighten.description.' + _geometry);
-           };
+               if (text === 'flat' || text === 'discrete' || text === 'sign') {
+                 text = valueParts[2];
+               }

 
 

+               text = text.replace(/-/g, ' ');
+               text = text.charAt(0).toUpperCase() + text.slice(1);
+               _mlyHighlightedDetection = null;
+             }

 
 

-           operation.annotation = function() {
-               return _t('operations.straighten.annotation.' + _geometry);
-           };
+             var decodedGeometry = window.atob(data.geometry);
+             var uintArray = new Uint8Array(decodedGeometry.length);

 
 

+             for (var i = 0; i < decodedGeometry.length; i++) {
+               uintArray[i] = decodedGeometry.charCodeAt(i);
+             }

 
 

-           operation.id = 'straighten';
-           operation.keys = [_t('operations.straighten.key')];
-           operation.title = _t('operations.straighten.title');
-           operation.behavior = behaviorOperation(context).which(operation);
+             var tile = new VectorTile(new pbf(uintArray.buffer));
+             var layer = tile.layers['mpy-or'];
+             var geometries = layer.feature(0).loadGeometry();
+             var polygon = geometries.map(function (ring) {
+               return ring.map(function (point) {
+                 return [point.x / layer.extent, point.y / layer.extent];
+               });
+             });
+             tag = new mapillary.OutlineTag(data.id, new mapillary.PolygonGeometry(polygon[0]), {
+               text: text,
+               textColor: color,
+               lineColor: color,
+               lineWidth: 2,
+               fillColor: color,
+               fillOpacity: 0.3
+             });
+             return tag;
+           }
+         },
+         // Return the current cache
+         cache: function cache() {
+           return _mlyCache;
+         }
+       };

 
 

-           return operation;
-       }
+       function validationIssue(attrs) {
+         this.type = attrs.type; // required - name of rule that created the issue (e.g. 'missing_tag')

 
 

-       var Operations = /*#__PURE__*/Object.freeze({
-               __proto__: null,
-               operationCircularize: operationCircularize,
-               operationContinue: operationContinue,
-               operationCopy: operationCopy,
-               operationDelete: operationDelete,
-               operationDisconnect: operationDisconnect,
-               operationDowngrade: operationDowngrade,
-               operationExtract: operationExtract,
-               operationMerge: operationMerge,
-               operationMove: operationMove,
-               operationOrthogonalize: operationOrthogonalize,
-               operationPaste: operationPaste,
-               operationReflectShort: operationReflectShort,
-               operationReflectLong: operationReflectLong,
-               operationReverse: operationReverse,
-               operationRotate: operationRotate,
-               operationSplit: operationSplit,
-               operationStraighten: operationStraighten
-       });
+         this.subtype = attrs.subtype; // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')

 
 

-       var _relatedParent;
+         this.severity = attrs.severity; // required - 'warning' or 'error'

 
 

+         this.message = attrs.message; // required - function returning localized string

 
 

-       function modeSelect(context, selectedIDs) {
-           var mode = {
-               id: 'select',
-               button: 'browse'
-           };
+         this.reference = attrs.reference; // optional - function(selection) to render reference information

 
 

-           var keybinding = utilKeybinding('select');
+         this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue

 
 

-           var _breatheBehavior = behaviorBreathe();
-           var _modeDragNode = modeDragNode(context);
-           var _selectBehavior;
-           var _behaviors = [];
+         this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue

 
 

-           var _operations = [];
-           var _newFeature = false;
-           var _follow = false;
+         this.data = attrs.data; // optional - object containing extra data for the fixes

 
 

+         this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes

 
 

-           function singular() {
-               if (selectedIDs && selectedIDs.length === 1) {
-                   return context.hasEntity(selectedIDs[0]);
-               }
-           }
+         this.hash = attrs.hash; // optional - string to further differentiate the issue

 
 

-           function selectedEntities() {
-               return selectedIDs.map(function(id) {
-                   return context.hasEntity(id);
-               }).filter(Boolean);
-           }
+         this.id = generateID.apply(this); // generated - see below

 
 

+         this.key = generateKey.apply(this); // generated - see below (call after generating this.id)

 
 

-           function checkSelectedIDs() {
-               var ids = [];
-               if (Array.isArray(selectedIDs)) {
-                   ids = selectedIDs.filter(function(id) {
-                       return context.hasEntity(id);
-                   });
-               }
+         this.autoFix = null; // generated - if autofix exists, will be set below
+         // A unique, deterministic string hash.
+         // Issues with identical id values are considered identical.

 
 

-               if (!ids.length) {
-                   context.enter(modeBrowse(context));
-                   return false;
-               } else if ((selectedIDs.length > 1 && ids.length === 1) ||
-                   (selectedIDs.length === 1 && ids.length > 1)) {
-                   // switch between single- and multi-select UI
-                   context.enter(modeSelect(context, ids));
-                   return false;
-               }
+         function generateID() {
+           var parts = [this.type];

 
 

-               selectedIDs = ids;
-               return true;
+           if (this.hash) {
+             // subclasses can pass in their own differentiator
+             parts.push(this.hash);

            }
 
            }
 

+           if (this.subtype) {
+             parts.push(this.subtype);
+           } // include the entities this issue is for
+           // (sort them so the id is deterministic)

 
 

-           // find the common parent ways for nextVertex, previousVertex
-           function commonParents() {
-               var graph = context.graph();
-               var commonParents = [];

 
 

-               for (var i = 0; i < selectedIDs.length; i++) {
-                   var entity = context.hasEntity(selectedIDs[i]);
-                   if (!entity || entity.geometry(graph) !== 'vertex') {
-                       return [];  // selection includes some not vertexes
-                   }
+           if (this.entityIds) {
+             var entityKeys = this.entityIds.slice().sort();
+             parts.push.apply(parts, entityKeys);
+           }

 
 

-                   var currParents = graph.parentWays(entity).map(function(w) { return w.id; });
-                   if (!commonParents.length) {
-                       commonParents = currParents;
-                       continue;
-                   }
+           return parts.join(':');
+         } // An identifier suitable for use as the second argument to d3.selection#data().
+         // (i.e. this should change whenever the data needs to be refreshed)

 
 

-                   commonParents = utilArrayIntersection(commonParents, currParents);
-                   if (!commonParents.length) {
-                       return [];
-                   }
-               }

 
 

-               return commonParents;
-           }
+         function generateKey() {
+           return this.id + ':' + Date.now().toString(); // include time of creation
+         }

 
 

+         this.extent = function (resolver) {
+           if (this.loc) {
+             return geoExtent(this.loc);
+           }

 
 

-           function singularParent() {
-               var parents = commonParents();
-               if (!parents || parents.length === 0) {
-                   _relatedParent = null;
-                   return null;
-               }
+           if (this.entityIds && this.entityIds.length) {
+             return this.entityIds.reduce(function (extent, entityId) {
+               return extent.extend(resolver.entity(entityId).extent(resolver));
+             }, geoExtent());
+           }

 
 

-               // relatedParent is used when we visit a vertex with multiple
-               // parents, and we want to remember which parent line we started on.
+           return null;
+         };

 
 

-               if (parents.length === 1) {
-                   _relatedParent = parents[0];  // remember this parent for later
-                   return _relatedParent;
-               }
+         this.fixes = function (context) {
+           var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
+           var issue = this;

 
 

-               if (parents.indexOf(_relatedParent) !== -1) {
-                   return _relatedParent;   // prefer the previously seen parent
+           if (issue.severity === 'warning') {
+             // allow ignoring any issue that's not an error
+             fixes.push(new validationIssueFix({
+               title: _t.html('issues.fix.ignore_issue.title'),
+               icon: 'iD-icon-close',
+               onClick: function onClick() {
+                 context.validator().ignoreIssue(this.issue.id);

                }
                }

-
-               return parents[0];
+             }));

            }
 
            }
 

+           fixes.forEach(function (fix) {
+             // the id doesn't matter as long as it's unique to this issue/fix
+             fix.id = fix.title; // add a reference to the issue for use in actions

 
 

-           mode.selectedIDs = function(val) {
-               if (!arguments.length) { return selectedIDs; }
-               selectedIDs = val;
-               return mode;
-           };
-
-
-           mode.zoomToSelected = function() {
-               context.map().zoomToEase(selectedEntities());
-           };
+             fix.issue = issue;

 
 

+             if (fix.autoArgs) {
+               issue.autoFix = fix;
+             }
+           });
+           return fixes;
+         };
+       }
+       function validationIssueFix(attrs) {
+         this.title = attrs.title; // Required

 
 

-           mode.newFeature = function(val) {
-               if (!arguments.length) { return _newFeature; }
-               _newFeature = val;
-               return mode;
-           };
+         this.onClick = attrs.onClick; // Optional - the function to run to apply the fix

 
 

+         this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any

 
 

-           mode.selectBehavior = function(val) {
-               if (!arguments.length) { return _selectBehavior; }
-               _selectBehavior = val;
-               return mode;
-           };
+         this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set

 
 

+         this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.

 
 

-           mode.follow = function(val) {
-               if (!arguments.length) { return _follow; }
-               _follow = val;
-               return mode;
-           };
+         this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run

 
 

-           function loadOperations() {
+         this.issue = null; // Generated link - added by validationIssue
+       }

 
 

-               _operations.forEach(function(operation) {
-                   if (operation.behavior) {
-                       context.uninstall(operation.behavior);
-                   }
+       var buildRuleChecks = function buildRuleChecks() {
+         return {
+           equals: function equals(_equals) {
+             return function (tags) {
+               return Object.keys(_equals).every(function (k) {
+                 return _equals[k] === tags[k];

                });
                });

+             };
+           },
+           notEquals: function notEquals(_notEquals) {
+             return function (tags) {
+               return Object.keys(_notEquals).some(function (k) {
+                 return _notEquals[k] !== tags[k];
+               });
+             };
+           },
+           absence: function absence(_absence) {
+             return function (tags) {
+               return Object.keys(tags).indexOf(_absence) === -1;
+             };
+           },
+           presence: function presence(_presence) {
+             return function (tags) {
+               return Object.keys(tags).indexOf(_presence) > -1;
+             };
+           },
+           greaterThan: function greaterThan(_greaterThan) {
+             var key = Object.keys(_greaterThan)[0];
+             var value = _greaterThan[key];
+             return function (tags) {
+               return tags[key] > value;
+             };
+           },
+           greaterThanEqual: function greaterThanEqual(_greaterThanEqual) {
+             var key = Object.keys(_greaterThanEqual)[0];
+             var value = _greaterThanEqual[key];
+             return function (tags) {
+               return tags[key] >= value;
+             };
+           },
+           lessThan: function lessThan(_lessThan) {
+             var key = Object.keys(_lessThan)[0];
+             var value = _lessThan[key];
+             return function (tags) {
+               return tags[key] < value;
+             };
+           },
+           lessThanEqual: function lessThanEqual(_lessThanEqual) {
+             var key = Object.keys(_lessThanEqual)[0];
+             var value = _lessThanEqual[key];
+             return function (tags) {
+               return tags[key] <= value;
+             };
+           },
+           positiveRegex: function positiveRegex(_positiveRegex) {
+             var tagKey = Object.keys(_positiveRegex)[0];

 
 

-               _operations = Object.values(Operations)
-                   .map(function(o) { return o(context, selectedIDs); })
-                   .filter(function(o) { return o.available() && o.id !== 'delete' && o.id !== 'downgrade' && o.id !== 'copy'; });
-
-               var copyOperation = operationCopy(context, selectedIDs);
-               if (copyOperation.available()) {
-                   // group copy operation with delete/downgrade
-                   _operations.push(copyOperation);
-               }
-
-               var downgradeOperation = operationDowngrade(context, selectedIDs);
-               // don't allow delete if downgrade is available
-               var lastOperation = !context.inIntro() && downgradeOperation.available() ? downgradeOperation : operationDelete(context, selectedIDs);
+             var expression = _positiveRegex[tagKey].join('|');

 
 

-               _operations.push(lastOperation);
+             var regex = new RegExp(expression);
+             return function (tags) {
+               return regex.test(tags[tagKey]);
+             };
+           },
+           negativeRegex: function negativeRegex(_negativeRegex) {
+             var tagKey = Object.keys(_negativeRegex)[0];

 
 

-               _operations.forEach(function(operation) {
-                   if (operation.behavior) {
-                       context.install(operation.behavior);
-                   }
-               });
+             var expression = _negativeRegex[tagKey].join('|');

 
 

-               // remove any displayed menu
-               context.ui().closeEditMenu();
+             var regex = new RegExp(expression);
+             return function (tags) {
+               return !regex.test(tags[tagKey]);
+             };

            }
            }

+         };
+       };

 
 

-           mode.operations = function() {
-               return _operations;
-           };
+       var buildLineKeys = function buildLineKeys() {
+         return {
+           highway: {
+             rest_area: true,
+             services: true
+           },
+           railway: {
+             roundhouse: true,
+             station: true,
+             traverser: true,
+             turntable: true,
+             wash: true
+           }
+         };
+       };

 
 

+       var serviceMapRules = {
+         init: function init() {
+           this._ruleChecks = buildRuleChecks();
+           this._validationRules = [];
+           this._areaKeys = osmAreaKeys;
+           this._lineKeys = buildLineKeys();
+         },
+         // list of rules only relevant to tag checks...
+         filterRuleChecks: function filterRuleChecks(selector) {
+           var _ruleChecks = this._ruleChecks;
+           return Object.keys(selector).reduce(function (rules, key) {
+             if (['geometry', 'error', 'warning'].indexOf(key) === -1) {
+               rules.push(_ruleChecks[key](selector[key]));
+             }

 
 

-           mode.enter = function() {
-               if (!checkSelectedIDs()) { return; }
-
-               context.features().forceVisible(selectedIDs);
-
-               _modeDragNode.restoreSelectedIDs(selectedIDs);
-
-               loadOperations();
-
-               if (!_behaviors.length) {
-                   if (!_selectBehavior) { _selectBehavior = behaviorSelect(context); }
-
-                   _behaviors = [
-                       behaviorPaste(context),
-                       _breatheBehavior,
-                       behaviorHover(context).on('hover', context.ui().sidebar.hoverModeSelect),
-                       _selectBehavior,
-                       behaviorLasso(context),
-                       _modeDragNode.behavior,
-                       modeDragNote(context).behavior
-                   ];
-               }
-               _behaviors.forEach(context.install);
-
-               keybinding
-                   .on(_t('inspector.zoom_to.key'), mode.zoomToSelected)
-                   .on(['[', 'pgup'], previousVertex)
-                   .on([']', 'pgdown'], nextVertex)
-                   .on(['{', uiCmd('⌘['), 'home'], firstVertex)
-                   .on(['}', uiCmd('⌘]'), 'end'], lastVertex)
-                   .on(uiCmd('⇧←'), nudgeSelection([-10, 0]))
-                   .on(uiCmd('⇧↑'), nudgeSelection([0, -10]))
-                   .on(uiCmd('⇧→'), nudgeSelection([10, 0]))
-                   .on(uiCmd('⇧↓'), nudgeSelection([0, 10]))
-                   .on(uiCmd('⇧⌘←'), nudgeSelection([-100, 0]))
-                   .on(uiCmd('⇧⌘↑'), nudgeSelection([0, -100]))
-                   .on(uiCmd('⇧⌘→'), nudgeSelection([100, 0]))
-                   .on(uiCmd('⇧⌘↓'), nudgeSelection([0, 100]))
-                   .on(['\\', 'pause'], nextParent)
-                   .on('⎋', esc, true);
-
-               select(document)
-                   .call(keybinding);
-
-               context.ui().sidebar
-                   .select(selectedIDs, _newFeature);
-
-               context.history()
-                   .on('change.select', function() {
-                       loadOperations();
-                       // reselect after change in case relation members were removed or added
-                       selectElements();
-                   })
-                   .on('undone.select', checkSelectedIDs)
-                   .on('redone.select', checkSelectedIDs);
-
-               context.map()
-                   .on('drawn.select', selectElements)
-                   .on('crossEditableZoom.select', function() {
-                       selectElements();
-                       _breatheBehavior.restartIfNeeded(context.surface());
-                   });
+             return rules;
+           }, []);
+         },
+         // builds tagMap from mapcss-parse selector object...
+         buildTagMap: function buildTagMap(selector) {
+           var getRegexValues = function getRegexValues(regexes) {
+             return regexes.map(function (regex) {
+               return regex.replace(/\$|\^/g, '');
+             });
+           };

 
 

-               context.map().doubleUpHandler()
-                   .on('doubleUp.modeSelect', didDoubleUp);
+           var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
+             var values;
+             var isRegex = /regex/gi.test(key);
+             var isEqual = /equals/gi.test(key);

 
 

+             if (isRegex || isEqual) {
+               Object.keys(selector[key]).forEach(function (selectorKey) {
+                 values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);

 
 

-               selectElements();
+                 if (expectedTags.hasOwnProperty(selectorKey)) {
+                   values = values.concat(expectedTags[selectorKey]);
+                 }

 
 

-               if (_follow) {
-                   var extent = geoExtent();
-                   var graph = context.graph();
-                   selectedIDs.forEach(function(id) {
-                       var entity = context.entity(id);
-                       extent._extend(entity.extent(graph));
-                   });
+                 expectedTags[selectorKey] = values;
+               });
+             } else if (/(greater|less)Than(Equal)?|presence/g.test(key)) {
+               var tagKey = /presence/.test(key) ? selector[key] : Object.keys(selector[key])[0];
+               values = [selector[key][tagKey]];

 
 

-                   var loc = extent.center();
-                   context.map().centerEase(loc);
-                   // we could enter the mode multiple times, so reset follow for next time
-                   _follow = false;
+               if (expectedTags.hasOwnProperty(tagKey)) {
+                 values = values.concat(expectedTags[tagKey]);

                }
 
                }
 

+               expectedTags[tagKey] = values;
+             }

 
 

-               function nudgeSelection(delta) {
-                   return function() {
-                       // prevent nudging during low zoom selection
-                       if (!context.map().withinEditableZoom()) { return; }
-
-                       var moveOp = operationMove(context, selectedIDs);
-                       if (moveOp.disabled()) {
-                           context.ui().flash
-                               .duration(4000)
-                               .iconName('#iD-operation-' + moveOp.id)
-                               .iconClass('operation disabled')
-                               .text(moveOp.tooltip)();
-                       } else {
-                           context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
-                       }
-                   };
-               }
+             return expectedTags;
+           }, {});
+           return tagMap;
+         },
+         // inspired by osmWay#isArea()
+         inferGeometry: function inferGeometry(tagMap) {
+           var _lineKeys = this._lineKeys;
+           var _areaKeys = this._areaKeys;

 
 

+           var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
+             return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
+           };

 
 

-               function didDoubleUp(loc) {
-                   if (!context.map().withinEditableZoom()) { return; }
+           var keyValueImpliesLine = function keyValueImpliesLine(key) {
+             return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
+           };

 
 

-                   var target = select(event.target);
+           if (tagMap.hasOwnProperty('area')) {
+             if (tagMap.area.indexOf('yes') > -1) {
+               return 'area';
+             }

 
 

-                   var datum = target.datum();
-                   var entity = datum && datum.properties && datum.properties.entity;
-                   if (!entity) { return; }
+             if (tagMap.area.indexOf('no') > -1) {
+               return 'line';
+             }
+           }

 
 

-                   if (entity instanceof osmWay && target.classed('target')) {
-                       var choice = geoChooseEdge(context.graph().childNodes(entity), loc, context.projection);
-                       var prev = entity.nodes[choice.index - 1];
-                       var next = entity.nodes[choice.index];
+           for (var key in tagMap) {
+             if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
+               return 'area';
+             }

 
 

-                       context.perform(
-                           actionAddMidpoint({ loc: choice.loc, edge: [prev, next] }, osmNode()),
-                           _t('operations.add.annotation.vertex')
-                       );
+             if (key in _lineKeys && keyValueImpliesLine(key)) {
+               return 'area';
+             }
+           }

 
 

-                   } else if (entity.type === 'midpoint') {
-                       context.perform(
-                           actionAddMidpoint({ loc: entity.loc, edge: entity.edge }, osmNode()),
-                           _t('operations.add.annotation.vertex'));
-                   }
+           return 'line';
+         },
+         // adds from mapcss-parse selector check...
+         addRule: function addRule(selector) {
+           var rule = {
+             // checks relevant to mapcss-selector
+             checks: this.filterRuleChecks(selector),
+             // true if all conditions for a tag error are true..
+             matches: function matches(entity) {
+               return this.checks.every(function (check) {
+                 return check(entity.tags);
+               });
+             },
+             // borrowed from Way#isArea()
+             inferredGeometry: this.inferGeometry(this.buildTagMap(selector), this._areaKeys),
+             geometryMatches: function geometryMatches(entity, graph) {
+               if (entity.type === 'node' || entity.type === 'relation') {
+                 return selector.geometry === entity.type;
+               } else if (entity.type === 'way') {
+                 return this.inferredGeometry === entity.geometry(graph);
+               }
+             },
+             // when geometries match and tag matches are present, return a warning...
+             findIssues: function findIssues(entity, graph, issues) {
+               if (this.geometryMatches(entity, graph) && this.matches(entity)) {
+                 var severity = Object.keys(selector).indexOf('error') > -1 ? 'error' : 'warning';
+                 var _message = selector[severity];
+                 issues.push(new validationIssue({
+                   type: 'maprules',
+                   severity: severity,
+                   message: function message() {
+                     return _message;
+                   },
+                   entityIds: [entity.id]
+                 }));

                }
                }

+             }
+           };

 
 

+           this._validationRules.push(rule);
+         },
+         clearRules: function clearRules() {
+           this._validationRules = [];
+         },
+         // returns validationRules...
+         validationRules: function validationRules() {
+           return this._validationRules;
+         },
+         // returns ruleChecks
+         ruleChecks: function ruleChecks() {
+           return this._ruleChecks;
+         }
+       };

 
 

-               function selectElements() {
-                   if (!checkSelectedIDs()) { return; }
+       var apibase$2 = 'https://nominatim.openstreetmap.org/';
+       var _inflight$2 = {};

 
 

-                   var surface = context.surface();
+       var _nominatimCache;

 
 

-                   surface.selectAll('.selected-member')
-                       .classed('selected-member', false);
+       var serviceNominatim = {
+         init: function init() {
+           _inflight$2 = {};
+           _nominatimCache = new RBush();
+         },
+         reset: function reset() {
+           Object.values(_inflight$2).forEach(function (controller) {
+             controller.abort();
+           });
+           _inflight$2 = {};
+           _nominatimCache = new RBush();
+         },
+         countryCode: function countryCode(location, callback) {
+           this.reverse(location, function (err, result) {
+             if (err) {
+               return callback(err);
+             } else if (result.address) {
+               return callback(null, result.address.country_code);
+             } else {
+               return callback('Unable to geocode', null);
+             }
+           });
+         },
+         reverse: function reverse(loc, callback) {
+           var cached = _nominatimCache.search({
+             minX: loc[0],
+             minY: loc[1],
+             maxX: loc[0],
+             maxY: loc[1]
+           });

 
 

-                   surface.selectAll('.selected')
-                       .classed('selected', false);
+           if (cached.length > 0) {
+             if (callback) callback(null, cached[0].data);
+             return;
+           }

 
 

-                   surface.selectAll('.related')
-                       .classed('related', false);
+           var params = {
+             zoom: 13,
+             format: 'json',
+             addressdetails: 1,
+             lat: loc[1],
+             lon: loc[0]
+           };
+           var url = apibase$2 + 'reverse?' + utilQsString(params);
+           if (_inflight$2[url]) return;
+           var controller = new AbortController();
+           _inflight$2[url] = controller;
+           d3_json(url, {
+             signal: controller.signal
+           }).then(function (result) {
+             delete _inflight$2[url];

 
 

-                   singularParent();
-                   if (_relatedParent) {
-                       surface.selectAll(utilEntitySelector([_relatedParent]))
-                           .classed('related', true);
-                   }
+             if (result && result.error) {
+               throw new Error(result.error);
+             }

 
 

-                   if (context.map().withinEditableZoom()) {
-                       // Apply selection styling if not in wide selection
+             var extent = geoExtent(loc).padByMeters(200);

 
 

-                       surface
-                           .selectAll(utilDeepMemberSelector(selectedIDs, context.graph(), true /* skipMultipolgonMembers */))
-                           .classed('selected-member', true);
-                       surface
-                           .selectAll(utilEntityOrDeepMemberSelector(selectedIDs, context.graph()))
-                           .classed('selected', true);
-                   }
+             _nominatimCache.insert(Object.assign(extent.bbox(), {
+               data: result
+             }));

 
 

-               }
+             if (callback) callback(null, result);
+           })["catch"](function (err) {
+             delete _inflight$2[url];
+             if (err.name === 'AbortError') return;
+             if (callback) callback(err.message);
+           });
+         },
+         search: function search(val, callback) {
+           var searchVal = encodeURIComponent(val);
+           var url = apibase$2 + 'search/' + searchVal + '?limit=10&format=json';
+           if (_inflight$2[url]) return;
+           var controller = new AbortController();
+           _inflight$2[url] = controller;
+           d3_json(url, {
+             signal: controller.signal
+           }).then(function (result) {
+             delete _inflight$2[url];

 
 

+             if (result && result.error) {
+               throw new Error(result.error);
+             }

 
 

-               function esc() {
-                   if (context.container().select('.combobox').size()) { return; }
-                   context.enter(modeBrowse(context));
-               }
+             if (callback) callback(null, result);
+           })["catch"](function (err) {
+             delete _inflight$2[url];
+             if (err.name === 'AbortError') return;
+             if (callback) callback(err.message);
+           });
+         }
+       };

 
 

+       // for punction see https://stackoverflow.com/a/21224179

 
 

-               function firstVertex() {
-                   event.preventDefault();
-                   var entity = singular();
-                   var parent = singularParent();
-                   var way;
+       function simplify$1(str) {
+         if (typeof str !== 'string') return '';
+         return diacritics.remove(str.replace(/&/g, 'and').replace(/İ/ig, 'i') // for BİM, İşbank - #5017
+         .replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>«»~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u2000-\u206f\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00-\u2e7f\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\ufeff\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g, '').toLowerCase());
+       }

 
 

-                   if (entity && entity.type === 'way') {
-                       way = entity;
-                   } else if (parent) {
-                       way = context.entity(parent);
-                   }
+       var matchGroups$1 = {adult_gaming_centre:["amenity/casino","amenity/gambling","leisure/adult_gaming_centre"],beauty:["shop/beauty","shop/hairdresser_supply"],bed:["shop/bed","shop/furniture"],beverages:["shop/alcohol","shop/beer","shop/beverages","shop/wine"],camping:["leisure/park","tourism/camp_site","tourism/caravan_site"],car_parts:["shop/car_parts","shop/car_repair","shop/tires","shop/tyres"],clinic:["amenity/clinic","amenity/doctors","healthcare/clinic","healthcare/dialysis"],confectionery:["shop/candy","shop/chocolate","shop/confectionery"],convenience:["shop/beauty","shop/chemist","shop/convenience","shop/cosmetics","shop/grocery","shop/newsagent"],coworking:["amenity/coworking_space","office/coworking","office/coworking_space"],dentist:["amenity/dentist","amenity/doctors","healthcare/dentist"],electronics:["office/telecommunication","shop/computer","shop/electronics","shop/hifi","shop/mobile","shop/mobile_phone","shop/telecommunication"],fabric:["shop/fabric","shop/haberdashery","shop/sewing"],fashion:["shop/accessories","shop/bag","shop/botique","shop/clothes","shop/department_store","shop/fashion","shop/fashion_accessories","shop/sports","shop/shoes"],financial:["amenity/bank","office/accountant","office/financial","office/financial_advisor","office/tax_advisor","shop/tax"],fitness:["leisure/fitness_centre","leisure/fitness_center","leisure/sports_centre","leisure/sports_center"],food:["amenity/pub","amenity/bar","amenity/cafe","amenity/fast_food","amenity/ice_cream","amenity/restaurant","shop/bakery","shop/ice_cream","shop/pastry","shop/tea","shop/coffee"],fuel:["amenity/fuel","shop/gas","shop/convenience;gas","shop/gas;convenience"],gift:["shop/gift","shop/card","shop/cards","shop/stationery"],hardware:["shop/bathroom_furnishing","shop/carpet","shop/diy","shop/doityourself","shop/doors","shop/electrical","shop/flooring","shop/hardware","shop/hardware_store","shop/power_tools","shop/tool_hire","shop/tools","shop/trade"],health_food:["shop/health","shop/health_food","shop/herbalist","shop/nutrition_supplements"],hobby:["shop/electronics","shop/hobby","shop/books","shop/games","shop/collector","shop/toys","shop/model","shop/video_games","shop/anime"],hospital:["amenity/doctors","amenity/hospital","healthcare/hospital"],houseware:["shop/houseware","shop/interior_decoration"],lifeboat_station:["amenity/lifeboat_station","emergency/lifeboat_station","emergency/marine_rescue"],lodging:["tourism/hotel","tourism/motel"],money_transfer:["amenity/money_transfer","shop/money_transfer"],office_supplies:["shop/office_supplies","shop/stationary","shop/stationery"],outdoor:["shop/outdoor","shop/sports"],pharmacy:["amenity/doctors","amenity/pharmacy","healthcare/pharmacy"],playground:["amenity/theme_park","leisure/amusement_arcade","leisure/playground"],rental:["amenity/bicycle_rental","amenity/boat_rental","amenity/car_rental","amenity/truck_rental","amenity/vehicle_rental","shop/rental"],school:["amenity/childcare","amenity/college","amenity/kindergarten","amenity/language_school","amenity/prep_school","amenity/school","amenity/university"],supermarket:["shop/food","shop/frozen_food","shop/greengrocer","shop/grocery","shop/supermarket","shop/wholesale"],variety_store:["shop/variety_store","shop/discount","shop/convenience"],vending:["amenity/vending_machine","shop/vending_machine"],storage:["shop/storage_units","shop/storage_rental"],weight_loss:["amenity/doctors","amenity/weight_clinic","healthcare/counselling","leisure/fitness_centre","office/therapist","shop/beauty","shop/diet","shop/food","shop/health_food","shop/herbalist","shop/nutrition","shop/nutrition_supplements","shop/weight_loss"],wholesale:["shop/wholesale","shop/supermarket","shop/department_store"]};
+       var matchGroupsJSON = {
+       matchGroups: matchGroups$1
+       };

 
 

-                   if (way) {
-                       context.enter(
-                           modeSelect(context, [way.first()]).follow(true)
-                       );
-                   }
-               }
+       var genericWords = ["^(barn|bazaa?r|bench|bou?tique|building|casa|church)$","^(baseball|basketball|football|soccer|softball|tennis(halle)?)\\s?(field|court)?$","^(club|green|out|ware)\\s?house$","^(driveway|el árbol|fountain|golf|government|graveyard)$","^(hofladen|librairie|magazine?|maison)$","^(mobile home|skate)?\\s?park$","^(n\\s?\\/?\\s?a|name|no\\s?name|none|null|temporary|test|unknown)$","^(obuwie|pond|pool|sale|shops?|sklep|stores?)$","^\\?+$","^tattoo( studio)?$","^windmill$","^церковная( лавка)?$"];
+       var genericWordsJSON = {
+       genericWords: genericWords
+       };

 
 

+       var trees$1 = {brands:{emoji:"🍔",mainTag:"brand:wikidata",sourceTags:["brand","name"],nameTags:{primary:"^(name|name:\\w+)$",alternate:"^(brand|brand:\\w+|operator|operator:\\w+|\\w+_name|\\w+_name:\\w+)$"}},flags:{emoji:"🚩",mainTag:"flag:wikidata",nameTags:{primary:"^(flag:name|flag:name:\\w+)$",alternate:"^(country|country:\\w+|flag|flag:\\w+|subject|subject:\\w+)$"}},operators:{emoji:"💼",mainTag:"operator:wikidata",sourceTags:["operator"],nameTags:{primary:"^(name|name:\\w+|operator|operator:\\w+)$",alternate:"^(brand|brand:\\w+|\\w+_name|\\w+_name:\\w+)$"}},transit:{emoji:"🚇",mainTag:"network:wikidata",sourceTags:["network"],nameTags:{primary:"^network$",alternate:"^(operator|operator:\\w+|network:\\w+|\\w+_name|\\w+_name:\\w+)$"}}};
+       var treesJSON = {
+       trees: trees$1
+       };

 
 

-               function lastVertex() {
-                   event.preventDefault();
-                   var entity = singular();
-                   var parent = singularParent();
-                   var way;
+       var matchGroups = matchGroupsJSON.matchGroups;
+       var trees = treesJSON.trees;
+       var Matcher = /*#__PURE__*/function () {
+         //
+         // `constructor`
+         // initialize the genericWords regexes
+         function Matcher() {
+           var _this = this;

 
 

-                   if (entity && entity.type === 'way') {
-                       way = entity;
-                   } else if (parent) {
-                       way = context.entity(parent);
-                   }
+           _classCallCheck$1(this, Matcher);

 
 

-                   if (way) {
-                       context.enter(
-                           modeSelect(context, [way.last()]).follow(true)
-                       );
-                   }
-               }
+           // The `matchIndex` is a specialized structure that allows us to quickly answer
+           //   _"Given a [key/value tagpair, name, location], what canonical items (brands etc) can match it?"_
+           //
+           // The index contains all valid combinations of k/v tagpairs and names
+           // matchIndex:
+           // {
+           //   'k/v': {
+           //     'primary':         Map (String 'nsimple' -> Set (itemIDs…),   // matches for tags like `name`, `name:xx`, etc.
+           //     'alternate':       Map (String 'nsimple' -> Set (itemIDs…),   // matches for tags like `alt_name`, `brand`, etc.
+           //     'excludeNamed':    Map (String 'pattern' -> RegExp),
+           //     'excludeGeneric':  Map (String 'pattern' -> RegExp)
+           //   },
+           // }
+           //
+           // {
+           //   'amenity/bank': {
+           //     'primary': {
+           //       'firstbank':              Set ("firstbank-978cca", "firstbank-9794e6", "firstbank-f17495", …),
+           //       …
+           //     },
+           //     'alternate': {
+           //       '1stbank':                Set ("firstbank-f17495"),
+           //       …
+           //     }
+           //   },
+           //   'shop/supermarket': {
+           //     'primary': {
+           //       'coop':                   Set ("coop-76454b", "coop-ebf2d9", "coop-36e991", …),
+           //       'coopfood':               Set ("coopfood-a8278b", …),
+           //       …
+           //     },
+           //     'alternate': {
+           //       'coop':                   Set ("coopfood-a8278b", …),
+           //       'federatedcooperatives':  Set ("coop-76454b", …),
+           //       'thecooperative':         Set ("coopfood-a8278b", …),
+           //       …
+           //     }
+           //   }
+           // }
+           //
+           this.matchIndex = undefined; // The `genericWords` structure matches the contents of genericWords.json to instantiated RegExp objects
+           // Map (String 'pattern' -> RegExp),

 
 

+           this.genericWords = new Map();
+           (genericWordsJSON.genericWords || []).forEach(function (s) {
+             return _this.genericWords.set(s, new RegExp(s, 'i'));
+           }); // The `itemLocation` structure maps itemIDs to locationSetIDs:
+           // {
+           //   'firstbank-f17495':  '+[first_bank_western_us.geojson]',
+           //   'firstbank-978cca':  '+[first_bank_carolinas.geojson]',
+           //   'coop-76454b':       '+[Q16]',
+           //   'coopfood-a8278b':   '+[Q23666]',
+           //   …
+           // }

 
 

-               function previousVertex() {
-                   event.preventDefault();
-                   var parent = singularParent();
-                   if (!parent) { return; }
+           this.itemLocation = undefined; // The `locationSets` structure maps locationSetIDs to *resolved* locationSets:
+           // {
+           //   '+[first_bank_western_us.geojson]':  GeoJSON {…},
+           //   '+[first_bank_carolinas.geojson]':   GeoJSON {…},
+           //   '+[Q16]':                            GeoJSON {…},
+           //   '+[Q23666]':                         GeoJSON {…},
+           //   …
+           // }

 
 

-                   var way = context.entity(parent);
-                   var length = way.nodes.length;
-                   var curr = way.nodes.indexOf(selectedIDs[0]);
-                   var index = -1;
+           this.locationSets = undefined; // The `locationIndex` is an instance of which-polygon spatial index for the locationSets.

 
 

-                   if (curr > 0) {
-                       index = curr - 1;
-                   } else if (way.isClosed()) {
-                       index = length - 2;
-                   }
+           this.locationIndex = undefined; // Array of match conflict pairs (currently unused)

 
 

-                   if (index !== -1) {
-                       context.enter(
-                           modeSelect(context, [way.nodes[index]]).follow(true)
-                       );
-                   }
-               }
+           this.warnings = [];
+         } //
+         // `buildMatchIndex()`
+         // Call this to prepare the matcher for use
+         //
+         // `data` needs to be an Object indexed on a 'tree/key/value' path.
+         // (e.g. cache filled by `fileTree.read` or data found in `dist/nsi.json`)
+         // {
+         //    'brands/amenity/bank': { properties: {}, items: [ {}, {}, … ] },
+         //    'brands/amenity/bar':  { properties: {}, items: [ {}, {}, … ] },
+         //    …
+         // }
+         //

 
 
 
 

-               function nextVertex() {
-                   event.preventDefault();
-                   var parent = singularParent();
-                   if (!parent) { return; }
+         _createClass$1(Matcher, [{
+           key: "buildMatchIndex",
+           value: function buildMatchIndex(data) {
+             var that = this;
+             if (that.matchIndex) return; // it was built already
+
+             that.matchIndex = new Map();
+             Object.keys(data).forEach(function (tkv) {
+               var category = data[tkv];
+               var parts = tkv.split('/', 3); // tkv = "tree/key/value"
+
+               var t = parts[0];
+               var k = parts[1];
+               var v = parts[2];
+               var thiskv = "".concat(k, "/").concat(v);
+               var tree = trees[t];
+               var branch = that.matchIndex.get(thiskv);
+
+               if (!branch) {
+                 branch = {
+                   primary: new Map(),
+                   alternate: new Map(),
+                   excludeGeneric: new Map(),
+                   excludeNamed: new Map()
+                 };
+                 that.matchIndex.set(thiskv, branch);
+               } // ADD EXCLUSIONS

 
 

-                   var way = context.entity(parent);
-                   var length = way.nodes.length;
-                   var curr = way.nodes.indexOf(selectedIDs[0]);
-                   var index = -1;

 
 

-                   if (curr < length - 1) {
-                       index = curr + 1;
-                   } else if (way.isClosed()) {
-                       index = 0;
-                   }
+               var properties = category.properties || {};
+               var exclude = properties.exclude || {};
+               (exclude.generic || []).forEach(function (s) {
+                 return branch.excludeGeneric.set(s, new RegExp(s, 'i'));
+               });
+               (exclude.named || []).forEach(function (s) {
+                 return branch.excludeNamed.set(s, new RegExp(s, 'i'));
+               });
+               var excludeRegexes = [].concat(_toConsumableArray(branch.excludeGeneric.values()), _toConsumableArray(branch.excludeNamed.values())); // ADD ITEMS

 
 

-                   if (index !== -1) {
-                       context.enter(
-                           modeSelect(context, [way.nodes[index]]).follow(true)
-                       );
-                   }
-               }
+               var items = category.items;
+               if (!Array.isArray(items) || !items.length) return; // Primary name patterns, match tags to take first
+               //  e.g. `name`, `name:ru`

 
 

+               var primaryName = new RegExp(tree.nameTags.primary, 'i'); // Alternate name patterns, match tags to consider after primary
+               //  e.g. `alt_name`, `short_name`, `brand`, `brand:ru`, etc..

 
 

-               function nextParent() {
-                   event.preventDefault();
-                   var parents = commonParents();
-                   if (!parents || parents.length < 2) { return; }
+               var alternateName = new RegExp(tree.nameTags.alternate, 'i'); // There are a few exceptions to the name matching regexes.
+               // Usually a tag suffix contains a language code like `name:en`, `name:ru`
+               // but we want to exclude things like `operator:type`, `name:etymology`, etc..

 
 

-                   var index = parents.indexOf(_relatedParent);
-                   if (index < 0 || index > parents.length - 2) {
-                       _relatedParent = parents[0];
-                   } else {
-                       _relatedParent = parents[index + 1];
-                   }
+               var notName = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`

 
 

-                   var surface = context.surface();
-                   surface.selectAll('.related')
-                       .classed('related', false);
+               var skipGenericKV = skipGenericKVMatches(t, k, v); // We will collect the generic KV pairs anyway (for the purpose of filtering them out of matchTags)

 
 

-                   if (_relatedParent) {
-                       surface.selectAll(utilEntitySelector([_relatedParent]))
-                           .classed('related', true);
-                   }
-               }
-           };
+               var genericKV = new Set(["".concat(k, "/yes"), "building/yes"]); // Collect alternate tagpairs for this kv category from matchGroups.
+               // We might also pick up a few more generic KVs (like `shop/yes`)

 
 

+               var matchGroupKV = new Set();
+               Object.values(matchGroups).forEach(function (matchGroup) {
+                 var inGroup = matchGroup.some(function (otherkv) {
+                   return otherkv === thiskv;
+                 });
+                 if (!inGroup) return;
+                 matchGroup.forEach(function (otherkv) {
+                   if (otherkv === thiskv) return; // skip self

 
 

-           mode.exit = function() {
+                   matchGroupKV.add(otherkv);
+                   var otherk = otherkv.split('/', 2)[0]; // we might pick up a `shop/yes`

 
 

-               _newFeature = false;
+                   genericKV.add("".concat(otherk, "/yes"));
+                 });
+               }); // For each item, insert all [key, value, name] combinations into the match index

 
 

-               _operations.forEach(function(operation) {
-                   if (operation.behavior) {
-                       context.uninstall(operation.behavior);
-                   }
-               });
-               _operations = [];
+               items.forEach(function (item) {
+                 if (!item.id) return; // Automatically remove redundant `matchTags` - #3417
+                 // (i.e. This kv is already covered by matchGroups, so it doesn't need to be in `item.matchTags`)

 
 

-               _behaviors.forEach(context.uninstall);
+                 if (Array.isArray(item.matchTags) && item.matchTags.length) {
+                   item.matchTags = item.matchTags.filter(function (matchTag) {
+                     return !matchGroupKV.has(matchTag) && !genericKV.has(matchTag);
+                   });
+                   if (!item.matchTags.length) delete item.matchTags;
+                 } // key/value tagpairs to insert into the match index..

 
 

-               select(document)
-                   .call(keybinding.unbind);

 
 

-               context.ui().closeEditMenu();
+                 var kvTags = ["".concat(thiskv)].concat(item.matchTags || []);

 
 

-               context.history()
-                   .on('change.select', null)
-                   .on('undone.select', null)
-                   .on('redone.select', null);
+                 if (!skipGenericKV) {
+                   kvTags = kvTags.concat(Array.from(genericKV)); // #3454 - match some generic tags
+                 } // Index all the namelike tag values

 
 

-               var surface = context.surface();

 
 

-               surface
-                   .selectAll('.selected-member')
-                   .classed('selected-member', false);
+                 Object.keys(item.tags).forEach(function (osmkey) {
+                   if (notName.test(osmkey)) return; // osmkey is not a namelike tag, skip

 
 

-               surface
-                   .selectAll('.selected')
-                   .classed('selected', false);
+                   var osmvalue = item.tags[osmkey];
+                   if (!osmvalue || excludeRegexes.some(function (regex) {
+                     return regex.test(osmvalue);
+                   })) return; // osmvalue missing or excluded

 
 

-               surface
-                   .selectAll('.highlighted')
-                   .classed('highlighted', false);
+                   if (primaryName.test(osmkey)) {
+                     kvTags.forEach(function (kv) {
+                       return insertName('primary', kv, simplify$1(osmvalue), item.id);
+                     });
+                   } else if (alternateName.test(osmkey)) {
+                     kvTags.forEach(function (kv) {
+                       return insertName('alternate', kv, simplify$1(osmvalue), item.id);
+                     });
+                   }
+                 }); // Index `matchNames` after indexing all other names..
+
+                 var keepMatchNames = new Set();
+                 (item.matchNames || []).forEach(function (matchName) {
+                   // If this matchname isn't already indexed, add it to the alternate index
+                   var nsimple = simplify$1(matchName);
+                   kvTags.forEach(function (kv) {
+                     var branch = that.matchIndex.get(kv);
+                     var primaryLeaf = branch && branch.primary.get(nsimple);
+                     var alternateLeaf = branch && branch.alternate.get(nsimple);
+                     var inPrimary = primaryLeaf && primaryLeaf.has(item.id);
+                     var inAlternate = alternateLeaf && alternateLeaf.has(item.id);
+
+                     if (!inPrimary && !inAlternate) {
+                       insertName('alternate', kv, nsimple, item.id);
+                       keepMatchNames.add(matchName);
+                     }
+                   });
+                 }); // Automatically remove redundant `matchNames` - #3417
+                 // (i.e. This name got indexed some other way, so it doesn't need to be in `item.matchNames`)

 
 

-               surface
-                   .selectAll('.related')
-                   .classed('related', false);
+                 if (keepMatchNames.size) {
+                   item.matchNames = Array.from(keepMatchNames);
+                 } else {
+                   delete item.matchNames;
+                 }
+               }); // each item
+             }); // each tkv
+             // Insert this item into the matchIndex
+
+             function insertName(which, kv, nsimple, itemID) {
+               if (!nsimple) return;
+               var branch = that.matchIndex.get(kv);
+
+               if (!branch) {
+                 branch = {
+                   primary: new Map(),
+                   alternate: new Map(),
+                   excludeGeneric: new Map(),
+                   excludeNamed: new Map()
+                 };
+                 that.matchIndex.set(kv, branch);
+               }

 
 

-               context.map().on('drawn.select', null);
-               context.ui().sidebar.hide();
-               context.features().forceVisible([]);
+               var leaf = branch[which].get(nsimple);

 
 

-               var entity = singular();
-               if (_newFeature && entity && entity.type === 'relation' &&
-                   // no tags
-                   Object.keys(entity.tags).length === 0 &&
-                   // no parent relations
-                   context.graph().parentRelations(entity).length === 0 &&
-                   // no members or one member with no role
-                   (entity.members.length === 0 || (entity.members.length === 1 && !entity.members[0].role))
-               ) {
-                   // the user added this relation but didn't edit it at all, so just delete it
-                   var deleteAction = actionDeleteRelation(entity.id, true /* don't delete untagged members */);
-                   context.perform(deleteAction, _t('operations.delete.annotation.relation'));
+               if (!leaf) {
+                 leaf = new Set();
+                 branch[which].set(nsimple, leaf);

                }
                }

-           };
-

 
 

-           return mode;
-       }
+               leaf.add(itemID); // insert
+             } // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`

 
 

-       function uiLasso(context) {
-           var group, polygon;

 
 

-           lasso.coordinates = [];
+             function skipGenericKVMatches(t, k, v) {
+               return t === 'flags' || t === 'transit' || k === 'landuse' || v === 'atm' || v === 'bicycle_parking' || v === 'car_sharing' || v === 'caravan_site' || v === 'charging_station' || v === 'dog_park' || v === 'parking' || v === 'phone' || v === 'playground' || v === 'post_box' || v === 'public_bookcase' || v === 'recycling' || v === 'vending_machine';
+             }
+           } //
+           // `buildLocationIndex()`
+           // Call this to prepare a which-polygon location index.
+           // This *resolves* all the locationSets into GeoJSON, which takes some time.
+           // You can skip this step if you don't care about matching within a location.
+           //
+           // `data` needs to be an Object indexed on a 'tree/key/value' path.
+           // (e.g. cache filled by `fileTree.read` or data found in `dist/nsi.json`)
+           // {
+           //    'brands/amenity/bank': { properties: {}, items: [ {}, {}, … ] },
+           //    'brands/amenity/bar':  { properties: {}, items: [ {}, {}, … ] },
+           //    …
+           // }
+           //

 
 

-           function lasso(selection) {
-               context.container()
-                   .classed('lasso', true);
+         }, {
+           key: "buildLocationIndex",
+           value: function buildLocationIndex(data, loco) {
+             var that = this;
+             if (that.locationIndex) return; // it was built already
+
+             that.itemLocation = new Map();
+             that.locationSets = new Map();
+             Object.keys(data).forEach(function (tkv) {
+               var items = data[tkv].items;
+               if (!Array.isArray(items) || !items.length) return;
+               items.forEach(function (item) {
+                 if (that.itemLocation.has(item.id)) return; // we've seen item id already - shouldn't be possible?
+
+                 var resolved;
+
+                 try {
+                   resolved = loco.resolveLocationSet(item.locationSet); // resolve a feature for this locationSet
+                 } catch (err) {
+                   console.warn("buildLocationIndex: ".concat(err.message)); // couldn't resolve
+                 }

 
 

-               group = selection
-                   .append('g')
-                   .attr('class', 'lasso hide');
+                 if (!resolved || !resolved.id) return;
+                 that.itemLocation.set(item.id, resolved.id); // link it to the item

 
 

-               polygon = group
-                   .append('path')
-                   .attr('class', 'lasso-path');
+                 if (that.locationSets.has(resolved.id)) return; // we've seen this locationSet feature before..
+                 // First time seeing this locationSet feature, make a copy and add to locationSet cache..

 
 

-               group
-                   .call(uiToggle(true));
-           }
+                 var feature = _cloneDeep(resolved.feature);

 
 

+                 feature.id = resolved.id; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)

 
 

-           function draw() {
-               if (polygon) {
-                   polygon.data([lasso.coordinates])
-                       .attr('d', function(d) { return 'M' + d.join(' L') + ' Z'; });
-               }
-           }
+                 feature.properties.id = resolved.id;

 
 

+                 if (!feature.geometry.coordinates.length || !feature.properties.area) {
+                   console.warn("buildLocationIndex: locationSet ".concat(resolved.id, " for ").concat(item.id, " resolves to an empty feature:"));
+                   console.warn(JSON.stringify(feature));
+                   return;
+                 }

 
 

-           lasso.extent = function () {
-               return lasso.coordinates.reduce(function(extent, point) {
-                   return extent.extend(geoExtent(point));
-               }, geoExtent());
-           };
+                 that.locationSets.set(resolved.id, feature);
+               });
+             });
+             that.locationIndex = whichPolygon_1({
+               type: 'FeatureCollection',
+               features: _toConsumableArray(that.locationSets.values())
+             });

 
 

+             function _cloneDeep(obj) {
+               return JSON.parse(JSON.stringify(obj));
+             }
+           } //
+           // `match()`
+           // Pass parts and return an Array of matches.
+           // `k` - key
+           // `v` - value
+           // `n` - namelike
+           // `loc` - optional - [lon,lat] location to search
+           //
+           // 1. If the [k,v,n] tuple matches a canonical item…
+           // Return an Array of match results.
+           // Each result will include the area in km² that the item is valid.
+           //
+           // Order of results:
+           // Primary ordering will be on the "match" column:
+           //   "primary" - where the query matches the `name` tag, followed by
+           //   "alternate" - where the query matches an alternate name tag (e.g. short_name, brand, operator, etc)
+           // Secondary ordering will be on the "area" column:
+           //   "area descending" if no location was provided, (worldwide before local)
+           //   "area ascending" if location was provided (local before worldwide)
+           //
+           // [
+           //   { match: 'primary',   itemID: String,  area: Number,  kv: String,  nsimple: String },
+           //   { match: 'primary',   itemID: String,  area: Number,  kv: String,  nsimple: String },
+           //   { match: 'alternate', itemID: String,  area: Number,  kv: String,  nsimple: String },
+           //   { match: 'alternate', itemID: String,  area: Number,  kv: String,  nsimple: String },
+           //   …
+           // ]
+           //
+           // -or-
+           //
+           // 2. If the [k,v,n] tuple matches an exclude pattern…
+           // Return an Array with a single exclude result, either
+           //
+           // [ { match: 'excludeGeneric', pattern: String,  kv: String } ]  // "generic" e.g. "Food Court"
+           //   or
+           // [ { match: 'excludeNamed', pattern: String,  kv: String } ]    // "named", e.g. "Kebabai"
+           //
+           // About results
+           //   "generic" - a generic word that is probably not really a name.
+           //     For these, iD should warn the user "Hey don't put 'food court' in the name tag".
+           //   "named" - a real name like "Kebabai" that is just common, but not a brand.
+           //     For these, iD should just let it be. We don't include these in NSI, but we don't want to nag users about it either.
+           //
+           // -or-
+           //
+           // 3. If the [k,v,n] tuple matches nothing of any kind, return `null`
+           //
+           //

 
 

-           lasso.p = function(_) {
-               if (!arguments.length) { return lasso; }
-               lasso.coordinates.push(_);
-               draw();
-               return lasso;
-           };
+         }, {
+           key: "match",
+           value: function match(k, v, n, loc) {
+             var that = this;

 
 

+             if (!that.matchIndex) {
+               throw new Error('match:  matchIndex not built.');
+             } // If we were supplied a location, and a that.locationIndex has been set up,
+             // get the locationSets that are valid there so we can filter results.

 
 

-           lasso.close = function() {
-               if (group) {
-                   group.call(uiToggle(false, function() {
-                       select(this).remove();
-                   }));
-               }
-               context.container().classed('lasso', false);
-           };

 
 

+             var matchLocations;

 
 

-           return lasso;
-       }
+             if (Array.isArray(loc) && that.locationIndex) {
+               // which-polygon query returns an array of GeoJSON properties, pass true to return all results
+               matchLocations = that.locationIndex([loc[0], loc[1], loc[0], loc[1]], true);
+             }

 
 

-       function behaviorLasso(context) {
+             var nsimple = simplify$1(n);
+             var seen = new Set();
+             var results = [];
+             gatherResults('primary');
+             gatherResults('alternate');
+             if (results.length) return results;
+             gatherResults('exclude');
+             return results.length ? results : null;
+
+             function gatherResults(which) {
+               // First try an exact match on k/v
+               var kv = "".concat(k, "/").concat(v);
+               var didMatch = tryMatch(which, kv);
+               if (didMatch) return; // If that didn't work, look in match groups for other pairs considered equivalent to k/v..
+
+               for (var mg in matchGroups) {
+                 var matchGroup = matchGroups[mg];
+                 var inGroup = matchGroup.some(function (otherkv) {
+                   return otherkv === kv;
+                 });
+                 if (!inGroup) continue;

 
 

-           // use pointer events on supported platforms; fallback to mouse events
-           var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+                 for (var i = 0; i < matchGroup.length; i++) {
+                   var otherkv = matchGroup[i];
+                   if (otherkv === kv) continue; // skip self

 
 

-           var behavior = function(selection) {
-               var lasso;
+                   didMatch = tryMatch(which, otherkv);
+                   if (didMatch) return;
+                 }
+               } // If finished 'exclude' pass and still haven't matched anything, try the global `genericWords.json` patterns

 
 
 
 

-               function pointerdown() {
-                   var button = 0;  // left
-                   if (event.button === button && event.shiftKey === true) {
-                       lasso = null;
+               if (which === 'exclude') {
+                 var regex = _toConsumableArray(that.genericWords.values()).find(function (regex) {
+                   return regex.test(n);
+                 });

 
 

-                       select(window)
-                           .on(_pointerPrefix + 'move.lasso', pointermove)
-                           .on(_pointerPrefix + 'up.lasso', pointerup);
+                 if (regex) {
+                   results.push({
+                     match: 'excludeGeneric',
+                     pattern: String(regex)
+                   }); // note no `branch`, no `kv`

 
 

-                       event.stopPropagation();
-                   }
+                   return;
+                 }

                }
                }

+             }

 
 

+             function tryMatch(which, kv) {
+               var branch = that.matchIndex.get(kv);
+               if (!branch) return;

 
 

-               function pointermove() {
-                   if (!lasso) {
-                       lasso = uiLasso(context);
-                       context.surface().call(lasso);
-                   }
-
-                   lasso.p(context.map().mouse());
-               }
+               if (which === 'exclude') {
+                 // Test name `n` against named and generic exclude patterns
+                 var regex = _toConsumableArray(branch.excludeNamed.values()).find(function (regex) {
+                   return regex.test(n);
+                 });

 
 

+                 if (regex) {
+                   results.push({
+                     match: 'excludeNamed',
+                     pattern: String(regex),
+                     kv: kv
+                   });
+                   return;
+                 }

 
 

-               function normalize(a, b) {
-                   return [
-                       [Math.min(a[0], b[0]), Math.min(a[1], b[1])],
-                       [Math.max(a[0], b[0]), Math.max(a[1], b[1])]
-                   ];
-               }
+                 regex = _toConsumableArray(branch.excludeGeneric.values()).find(function (regex) {
+                   return regex.test(n);
+                 });

 
 

+                 if (regex) {
+                   results.push({
+                     match: 'excludeGeneric',
+                     pattern: String(regex),
+                     kv: kv
+                   });
+                   return;
+                 }

 
 

-               function lassoed() {
-                   if (!lasso) { return []; }
+                 return;
+               }

 
 

-                   var graph = context.graph();
-                   var limitToNodes;
+               var leaf = branch[which].get(nsimple);
+               if (!leaf || !leaf.size) return; // If we get here, we matched something..
+               // Prepare the results, calculate areas (if location index was set up)

 
 

-                   if (context.map().editableDataEnabled(true /* skipZoomCheck */) && context.map().isInWideSelection()) {
-                       // only select from the visible nodes
-                       limitToNodes = new Set(utilGetAllNodes(context.selectedIDs(), graph));
-                   } else if (!context.map().editableDataEnabled()) {
-                       return [];
-                   }
+               var hits = Array.from(leaf).map(function (itemID) {
+                 var area = Infinity;

 
 

-                   var bounds = lasso.extent().map(context.projection.invert);
-                   var extent = geoExtent(normalize(bounds[0], bounds[1]));
+                 if (that.itemLocation && that.locationSets) {
+                   var location = that.locationSets.get(that.itemLocation.get(itemID));
+                   area = location && location.properties.area || Infinity;
+                 }

 
 

-                   var intersects = context.history().intersects(extent).filter(function(entity) {
-                       return entity.type === 'node' &&
-                           (!limitToNodes || limitToNodes.has(entity)) &&
-                           geoPointInPolygon(context.projection(entity.loc), lasso.coordinates) &&
-                           !context.features().isHidden(entity, graph, entity.geometry(graph));
-                   });
+                 return {
+                   match: which,
+                   itemID: itemID,
+                   area: area,
+                   kv: kv,
+                   nsimple: nsimple
+                 };
+               });
+               var sortFn = byAreaDescending; // Filter the match to include only results valid in the requested `loc`..

 
 

-                   // sort the lassoed nodes as best we can
-                   intersects.sort(function(node1, node2) {
-                       var parents1 = graph.parentWays(node1);
-                       var parents2 = graph.parentWays(node2);
-                       if (parents1.length && parents2.length) {
-                           // both nodes are vertices
-
-                           var sharedParents = utilArrayIntersection(parents1, parents2);
-                           if (sharedParents.length) {
-                               var sharedParentNodes = sharedParents[0].nodes;
-                               // vertices are members of the same way; sort them in their listed order
-                               return sharedParentNodes.indexOf(node1.id) -
-                                   sharedParentNodes.indexOf(node2.id);
-                           } else {
-                               // vertices do not share a way; group them by their respective parent ways
-                               return parseFloat(parents1[0].id.slice(1)) -
-                                   parseFloat(parents2[0].id.slice(1));
-                           }
+               if (matchLocations) {
+                 hits = hits.filter(isValidLocation);
+                 sortFn = byAreaAscending;
+               }

 
 

-                       } else if (parents1.length || parents2.length) {
-                           // only one node is a vertex; sort standalone points before vertices
-                           return parents1.length - parents2.length;
-                       }
-                       // both nodes are standalone points; sort left to right
-                       return node1.loc[0] - node2.loc[0];
-                   });
+               if (!hits.length) return; // push results

 
 

-                   return intersects.map(function(entity) { return entity.id; });
-               }
+               hits.sort(sortFn).forEach(function (hit) {
+                 if (seen.has(hit.itemID)) return;
+                 seen.add(hit.itemID);
+                 results.push(hit);
+               });
+               return true;

 
 

+               function isValidLocation(hit) {
+                 if (!that.itemLocation) return true;
+                 return matchLocations.find(function (props) {
+                   return props.id === that.itemLocation.get(hit.itemID);
+                 });
+               } // Sort smaller (more local) locations first.

 
 

-               function pointerup() {
-                   select(window)
-                       .on(_pointerPrefix + 'move.lasso', null)
-                       .on(_pointerPrefix + 'up.lasso', null);

 
 

-                   if (!lasso) { return; }
+               function byAreaAscending(hitA, hitB) {
+                 return hitA.area - hitB.area;
+               } // Sort larger (more worldwide) locations first.

 
 

-                   var ids = lassoed();
-                   lasso.close();

 
 

-                   if (ids.length) {
-                       context.enter(modeSelect(context, ids));
-                   }
+               function byAreaDescending(hitA, hitB) {
+                 return hitB.area - hitA.area;

                }
                }

+             }
+           } //
+           // `getWarnings()`
+           // Return any warnings discovered when buiding the index.
+           // (currently this does nothing)
+           //

 
 

-               selection
-                   .on(_pointerPrefix + 'down.lasso', pointerdown);
-           };
-
+         }, {
+           key: "getWarnings",
+           value: function getWarnings() {
+             return this.warnings;
+           }
+         }]);

 
 

-           behavior.off = function(selection) {
-               selection.on(_pointerPrefix + 'down.lasso', null);
-           };
+         return Matcher;
+       }();

 
 

+       /**
+        * Checks if `value` is the
+        * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
+        * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+        *
+        * @static
+        * @memberOf _
+        * @since 0.1.0
+        * @category Lang
+        * @param {*} value The value to check.
+        * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+        * @example
+        *
+        * _.isObject({});
+        * // => true
+        *
+        * _.isObject([1, 2, 3]);
+        * // => true
+        *
+        * _.isObject(_.noop);
+        * // => true
+        *
+        * _.isObject(null);
+        * // => false
+        */
+       function isObject$2(value) {
+         var type = _typeof(value);

 
 

-           return behavior;
+         return value != null && (type == 'object' || type == 'function');

        }
 
        }
 

-       function modeBrowse(context) {
-           var mode = {
-               button: 'browse',
-               id: 'browse',
-               title: _t('modes.browse.title'),
-               description: _t('modes.browse.description')
-           };
-           var sidebar;
+       /** Detect free variable `global` from Node.js. */
+       var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global && global.Object === Object && global;

 
 

-           var _selectBehavior;
-           var _behaviors = [];
+       /** Detect free variable `self`. */

 
 

+       var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
+       /** Used as a reference to the global object. */

 
 

-           mode.selectBehavior = function(val) {
-               if (!arguments.length) { return _selectBehavior; }
-               _selectBehavior = val;
-               return mode;
-           };
+       var root = freeGlobal || freeSelf || Function('return this')();

 
 

+       /**
+        * Gets the timestamp of the number of milliseconds that have elapsed since
+        * the Unix epoch (1 January 1970 00:00:00 UTC).
+        *
+        * @static
+        * @memberOf _
+        * @since 2.4.0
+        * @category Date
+        * @returns {number} Returns the timestamp.
+        * @example
+        *
+        * _.defer(function(stamp) {
+        *   console.log(_.now() - stamp);
+        * }, _.now());
+        * // => Logs the number of milliseconds it took for the deferred invocation.
+        */

 
 

-           mode.enter = function() {
-               if (!_behaviors.length) {
-                   if (!_selectBehavior) { _selectBehavior = behaviorSelect(context); }
-                   _behaviors = [
-                       behaviorPaste(context),
-                       behaviorHover(context).on('hover', context.ui().sidebar.hover),
-                       _selectBehavior,
-                       behaviorLasso(context),
-                       modeDragNode(context).behavior,
-                       modeDragNote(context).behavior
-                   ];
-               }
-               _behaviors.forEach(context.install);
+       var now = function now() {
+         return root.Date.now();
+       };

 
 

-               // Get focus on the body.
-               if (document.activeElement && document.activeElement.blur) {
-                   document.activeElement.blur();
-               }
+       /** Used to match a single whitespace character. */
+       var reWhitespace = /\s/;
+       /**
+        * Used by `_.trim` and `_.trimEnd` to get the index of the last non-whitespace
+        * character of `string`.
+        *
+        * @private
+        * @param {string} string The string to inspect.
+        * @returns {number} Returns the index of the last non-whitespace character.
+        */

 
 

-               if (sidebar) {
-                   context.ui().sidebar.show(sidebar);
-               } else {
-                   context.ui().sidebar.select(null);
-               }
-           };
+       function trimmedEndIndex(string) {
+         var index = string.length;

 
 

+         while (index-- && reWhitespace.test(string.charAt(index))) {}

 
 

-           mode.exit = function() {
-               context.ui().sidebar.hover.cancel();
-               _behaviors.forEach(context.uninstall);
+         return index;
+       }

 
 

-               if (sidebar) {
-                   context.ui().sidebar.hide();
-               }
-           };
+       /** Used to match leading whitespace. */

 
 

+       var reTrimStart = /^\s+/;
+       /**
+        * The base implementation of `_.trim`.
+        *
+        * @private
+        * @param {string} string The string to trim.
+        * @returns {string} Returns the trimmed string.
+        */

 
 

-           mode.sidebar = function(_) {
-               if (!arguments.length) { return sidebar; }
-               sidebar = _;
-               return mode;
-           };
+       function baseTrim(string) {
+         return string ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '') : string;
+       }

 
 

+       /** Built-in value references. */

 
 

-           mode.operations = function() {
-               return [operationPaste(context)];
-           };
+       var _Symbol = root.Symbol;

 
 

+       /** Used for built-in method references. */

 
 

-           return mode;
-       }
+       var objectProto$1 = Object.prototype;
+       /** Used to check objects for own properties. */

 
 

-       function behaviorAddWay(context) {
-           var dispatch$1 = dispatch('start', 'startFromWay', 'startFromNode');
-           var draw = behaviorDraw(context);
+       var hasOwnProperty$2 = objectProto$1.hasOwnProperty;
+       /**
+        * Used to resolve the
+        * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+        * of values.
+        */

 
 

-           function behavior(surface) {
-               draw.on('click', function() { dispatch$1.apply('start', this, arguments); })
-                   .on('clickWay', function() { dispatch$1.apply('startFromWay', this, arguments); })
-                   .on('clickNode', function() { dispatch$1.apply('startFromNode', this, arguments); })
-                   .on('cancel', behavior.cancel)
-                   .on('finish', behavior.cancel);
+       var nativeObjectToString$1 = objectProto$1.toString;
+       /** Built-in value references. */

 
 

-               context.map()
-                   .dblclickZoomEnable(false);
+       var symToStringTag$1 = _Symbol ? _Symbol.toStringTag : undefined;
+       /**
+        * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
+        *
+        * @private
+        * @param {*} value The value to query.
+        * @returns {string} Returns the raw `toStringTag`.
+        */

 
 

-               surface.call(draw);
-           }
+       function getRawTag(value) {
+         var isOwn = hasOwnProperty$2.call(value, symToStringTag$1),
+             tag = value[symToStringTag$1];

 
 

+         try {
+           value[symToStringTag$1] = undefined;
+           var unmasked = true;
+         } catch (e) {}

 
 

-           behavior.off = function(surface) {
-               surface.call(draw.off);
-           };
+         var result = nativeObjectToString$1.call(value);

 
 

+         if (unmasked) {
+           if (isOwn) {
+             value[symToStringTag$1] = tag;
+           } else {
+             delete value[symToStringTag$1];
+           }
+         }

 
 

-           behavior.cancel = function() {
-               window.setTimeout(function() {
-                   context.map().dblclickZoomEnable(true);
-               }, 1000);
+         return result;
+       }

 
 

-               context.enter(modeBrowse(context));
-           };
+       /** Used for built-in method references. */
+       var objectProto = Object.prototype;
+       /**
+        * Used to resolve the
+        * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+        * of values.
+        */

 
 

+       var nativeObjectToString = objectProto.toString;
+       /**
+        * Converts `value` to a string using `Object.prototype.toString`.
+        *
+        * @private
+        * @param {*} value The value to convert.
+        * @returns {string} Returns the converted string.
+        */

 
 

-           return utilRebind(behavior, dispatch$1, 'on');
+       function objectToString(value) {
+         return nativeObjectToString.call(value);

        }
 
        }
 

-       function behaviorHash(context) {
+       /** `Object#toString` result references. */

 
 

-           // cached window.location.hash
-           var _cachedHash = null;
-           // allowable latitude range
-           var _latitudeLimit = 90 - 1e-8;
-
-           function computedHashParameters() {
-               var map = context.map();
-               var center = map.center();
-               var zoom = map.zoom();
-               var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
-               var oldParams = utilObjectOmit(utilStringQs(window.location.hash),
-                   ['comment', 'source', 'hashtags', 'walkthrough']
-               );
-               var newParams = {};
+       var nullTag = '[object Null]',
+           undefinedTag = '[object Undefined]';
+       /** Built-in value references. */

 
 

-               delete oldParams.id;
-               var selected = context.selectedIDs().filter(function(id) {
-                   return context.hasEntity(id);
-               });
-               if (selected.length) {
-                   newParams.id = selected.join(',');
-               }
+       var symToStringTag = _Symbol ? _Symbol.toStringTag : undefined;
+       /**
+        * The base implementation of `getTag` without fallbacks for buggy environments.
+        *
+        * @private
+        * @param {*} value The value to query.
+        * @returns {string} Returns the `toStringTag`.
+        */

 
 

-               newParams.map = zoom.toFixed(2) +
-                   '/' + center[1].toFixed(precision) +
-                   '/' + center[0].toFixed(precision);
+       function baseGetTag(value) {
+         if (value == null) {
+           return value === undefined ? undefinedTag : nullTag;
+         }

 
 

-               return Object.assign(oldParams, newParams);
-           }
+         return symToStringTag && symToStringTag in Object(value) ? getRawTag(value) : objectToString(value);
+       }

 
 

-           function computedHash() {
-               return '#' + utilQsString(computedHashParameters(), true);
-           }
+       /**
+        * Checks if `value` is object-like. A value is object-like if it's not `null`
+        * and has a `typeof` result of "object".
+        *
+        * @static
+        * @memberOf _
+        * @since 4.0.0
+        * @category Lang
+        * @param {*} value The value to check.
+        * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+        * @example
+        *
+        * _.isObjectLike({});
+        * // => true
+        *
+        * _.isObjectLike([1, 2, 3]);
+        * // => true
+        *
+        * _.isObjectLike(_.noop);
+        * // => false
+        *
+        * _.isObjectLike(null);
+        * // => false
+        */
+       function isObjectLike(value) {
+         return value != null && _typeof(value) == 'object';
+       }

 
 

-           function computedTitle(includeChangeCount) {
+       /** `Object#toString` result references. */

 
 

-               var baseTitle = context.documentTitleBase() || 'iD';
-               var contextual;
-               var changeCount;
-               var titleID;
+       var symbolTag = '[object Symbol]';
+       /**
+        * Checks if `value` is classified as a `Symbol` primitive or object.
+        *
+        * @static
+        * @memberOf _
+        * @since 4.0.0
+        * @category Lang
+        * @param {*} value The value to check.
+        * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+        * @example
+        *
+        * _.isSymbol(Symbol.iterator);
+        * // => true
+        *
+        * _.isSymbol('abc');
+        * // => false
+        */

 
 

-               var selected = context.selectedIDs().filter(function(id) {
-                   return context.hasEntity(id);
-               });
-               if (selected.length) {
-                   var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
-                   if (selected.length > 1 ) {
-                       contextual = _t('title.labeled_and_more', {
-                           labeled: firstLabel,
-                           count: (selected.length - 1).toString()
-                       });
-                   } else {
-                       contextual = firstLabel;
-                   }
-                   titleID = 'context';
-               }
+       function isSymbol(value) {
+         return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
+       }

 
 

-               if (includeChangeCount) {
-                   changeCount = context.history().difference().summary().length;
-                   if (changeCount > 0) {
-                       titleID = contextual ? 'changes_context' : 'changes';
-                   }
-               }
+       /** Used as references for various `Number` constants. */

 
 

-               if (titleID) {
-                   return _t('title.format.' + titleID, {
-                       changes: changeCount,
-                       base: baseTitle,
-                       context: contextual
-                   });
-               }
+       var NAN = 0 / 0;
+       /** Used to detect bad signed hexadecimal string values. */

 
 

-               return baseTitle;
-           }
+       var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+       /** Used to detect binary string values. */

 
 

-           function updateTitle(includeChangeCount) {
-               if (!context.setsDocumentTitle()) { return; }
+       var reIsBinary = /^0b[01]+$/i;
+       /** Used to detect octal string values. */

 
 

-               var newTitle = computedTitle(includeChangeCount);
-               if (document.title !== newTitle) {
-                   document.title = newTitle;
-               }
-           }
+       var reIsOctal = /^0o[0-7]+$/i;
+       /** Built-in method references without a dependency on `root`. */
+
+       var freeParseInt = parseInt;
+       /**
+        * Converts `value` to a number.
+        *
+        * @static
+        * @memberOf _
+        * @since 4.0.0
+        * @category Lang
+        * @param {*} value The value to process.
+        * @returns {number} Returns the number.
+        * @example
+        *
+        * _.toNumber(3.2);
+        * // => 3.2
+        *
+        * _.toNumber(Number.MIN_VALUE);
+        * // => 5e-324
+        *
+        * _.toNumber(Infinity);
+        * // => Infinity
+        *
+        * _.toNumber('3.2');
+        * // => 3.2
+        */
+
+       function toNumber(value) {
+         if (typeof value == 'number') {
+           return value;
+         }

 
 

-           function updateHashIfNeeded() {
-               if (context.inIntro()) { return; }
+         if (isSymbol(value)) {
+           return NAN;
+         }

 
 

-               var latestHash = computedHash();
-               if (_cachedHash !== latestHash) {
-                   _cachedHash = latestHash;
+         if (isObject$2(value)) {
+           var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
+           value = isObject$2(other) ? other + '' : other;
+         }

 
 

-                   // Update the URL hash without affecting the browser navigation stack,
-                   // though unavoidably creating a browser history entry
-                   window.history.replaceState(null, computedTitle(false /* includeChangeCount */), latestHash);
+         if (typeof value != 'string') {
+           return value === 0 ? value : +value;
+         }

 
 

-                   // set the title we want displayed for the browser tab/window
-                   updateTitle(true /* includeChangeCount */);
-               }
-           }
+         value = baseTrim(value);
+         var isBinary = reIsBinary.test(value);
+         return isBinary || reIsOctal.test(value) ? freeParseInt(value.slice(2), isBinary ? 2 : 8) : reIsBadHex.test(value) ? NAN : +value;
+       }

 
 

-           var _throttledUpdate = throttle(updateHashIfNeeded, 500);
-           var _throttledUpdateTitle = throttle(function() {
-               updateTitle(true /* includeChangeCount */);
-           }, 500);
+       /** Error message constants. */

 
 

-           function hashchange() {
+       var FUNC_ERROR_TEXT$1 = 'Expected a function';
+       /* Built-in method references for those with the same name as other `lodash` methods. */

 
 

-               // ignore spurious hashchange events
-               if (window.location.hash === _cachedHash) { return; }
+       var nativeMax = Math.max,
+           nativeMin = Math.min;
+       /**
+        * Creates a debounced function that delays invoking `func` until after `wait`
+        * milliseconds have elapsed since the last time the debounced function was
+        * invoked. The debounced function comes with a `cancel` method to cancel
+        * delayed `func` invocations and a `flush` method to immediately invoke them.
+        * Provide `options` to indicate whether `func` should be invoked on the
+        * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
+        * with the last arguments provided to the debounced function. Subsequent
+        * calls to the debounced function return the result of the last `func`
+        * invocation.
+        *
+        * **Note:** If `leading` and `trailing` options are `true`, `func` is
+        * invoked on the trailing edge of the timeout only if the debounced function
+        * is invoked more than once during the `wait` timeout.
+        *
+        * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+        * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+        *
+        * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+        * for details over the differences between `_.debounce` and `_.throttle`.
+        *
+        * @static
+        * @memberOf _
+        * @since 0.1.0
+        * @category Function
+        * @param {Function} func The function to debounce.
+        * @param {number} [wait=0] The number of milliseconds to delay.
+        * @param {Object} [options={}] The options object.
+        * @param {boolean} [options.leading=false]
+        *  Specify invoking on the leading edge of the timeout.
+        * @param {number} [options.maxWait]
+        *  The maximum time `func` is allowed to be delayed before it's invoked.
+        * @param {boolean} [options.trailing=true]
+        *  Specify invoking on the trailing edge of the timeout.
+        * @returns {Function} Returns the new debounced function.
+        * @example
+        *
+        * // Avoid costly calculations while the window size is in flux.
+        * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
+        *
+        * // Invoke `sendMail` when clicked, debouncing subsequent calls.
+        * jQuery(element).on('click', _.debounce(sendMail, 300, {
+        *   'leading': true,
+        *   'trailing': false
+        * }));
+        *
+        * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
+        * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
+        * var source = new EventSource('/stream');
+        * jQuery(source).on('message', debounced);
+        *
+        * // Cancel the trailing debounced invocation.
+        * jQuery(window).on('popstate', debounced.cancel);
+        */

 
 

-               _cachedHash = window.location.hash;
+       function debounce(func, wait, options) {
+         var lastArgs,
+             lastThis,
+             maxWait,
+             result,
+             timerId,
+             lastCallTime,
+             lastInvokeTime = 0,
+             leading = false,
+             maxing = false,
+             trailing = true;

 
 

-               var q = utilStringQs(_cachedHash);
-               var mapArgs = (q.map || '').split('/').map(Number);
+         if (typeof func != 'function') {
+           throw new TypeError(FUNC_ERROR_TEXT$1);
+         }

 
 

-               if (mapArgs.length < 3 || mapArgs.some(isNaN)) {
-                   // replace bogus hash
-                   updateHashIfNeeded();
+         wait = toNumber(wait) || 0;

 
 

-               } else {
-                   // don't update if the new hash already reflects the state of iD
-                   if (_cachedHash === computedHash()) { return; }
+         if (isObject$2(options)) {
+           leading = !!options.leading;
+           maxing = 'maxWait' in options;
+           maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
+           trailing = 'trailing' in options ? !!options.trailing : trailing;
+         }

 
 

-                   var mode = context.mode();
+         function invokeFunc(time) {
+           var args = lastArgs,
+               thisArg = lastThis;
+           lastArgs = lastThis = undefined;
+           lastInvokeTime = time;
+           result = func.apply(thisArg, args);
+           return result;
+         }

 
 

-                   context.map().centerZoom([mapArgs[2], Math.min(_latitudeLimit, Math.max(-_latitudeLimit, mapArgs[1]))], mapArgs[0]);
+         function leadingEdge(time) {
+           // Reset any `maxWait` timer.
+           lastInvokeTime = time; // Start the timer for the trailing edge.

 
 

-                   if (q.id) {
-                       var ids = q.id.split(',').filter(function(id) {
-                           return context.hasEntity(id);
-                       });
-                       var skip = mode && mode.id === 'select' && utilArrayIdentical(mode.selectedIDs(), ids);
-                       if (ids.length && !skip) {
-                           context.enter(modeSelect(context, ids));
-                           return;
-                       }
-                   }
+           timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.

 
 

-                   var center = context.map().center();
-                   var dist = geoSphericalDistance(center, [mapArgs[2], mapArgs[1]]);
-                   var maxdist = 500;
+           return leading ? invokeFunc(time) : result;
+         }

 
 

-                   // Don't allow the hash location to change too much while drawing
-                   // This can happen if the user accidently hit the back button.  #3996
-                   if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
-                       context.enter(modeBrowse(context));
-                       return;
-                   }
-               }
-           }
+         function remainingWait(time) {
+           var timeSinceLastCall = time - lastCallTime,
+               timeSinceLastInvoke = time - lastInvokeTime,
+               timeWaiting = wait - timeSinceLastCall;
+           return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
+         }

 
 

-           function behavior() {
-               context.map()
-                   .on('move.behaviorHash', _throttledUpdate);
+         function shouldInvoke(time) {
+           var timeSinceLastCall = time - lastCallTime,
+               timeSinceLastInvoke = time - lastInvokeTime; // Either this is the first call, activity has stopped and we're at the
+           // trailing edge, the system time has gone backwards and we're treating
+           // it as the trailing edge, or we've hit the `maxWait` limit.

 
 

-               context.history()
-                   .on('change.behaviorHash', _throttledUpdateTitle);
+           return lastCallTime === undefined || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
+         }

 
 

-               context
-                   .on('enter.behaviorHash', _throttledUpdate);
+         function timerExpired() {
+           var time = now();

 
 

-               select(window)
-                   .on('hashchange.behaviorHash', hashchange);
+           if (shouldInvoke(time)) {
+             return trailingEdge(time);
+           } // Restart the timer.

 
 

-               if (window.location.hash) {
-                   var q = utilStringQs(window.location.hash);

 
 

-                   if (q.id) {
-                       //if (!context.history().hasRestorableChanges()) {
-                           // targeting specific features: download, select, and zoom to them
-                           context.zoomToEntity(q.id.split(',')[0], !q.map);
-                       //}
-                   }
+           timerId = setTimeout(timerExpired, remainingWait(time));
+         }

 
 

-                   if (q.walkthrough === 'true') {
-                       behavior.startWalkthrough = true;
-                   }
+         function trailingEdge(time) {
+           timerId = undefined; // Only invoke if we have `lastArgs` which means `func` has been
+           // debounced at least once.

 
 

-                   if (q.map) {
-                       behavior.hadHash = true;
-                   }
+           if (trailing && lastArgs) {
+             return invokeFunc(time);
+           }

 
 

-                   hashchange();
+           lastArgs = lastThis = undefined;
+           return result;
+         }

 
 

-                   updateTitle(false);
-               }
+         function cancel() {
+           if (timerId !== undefined) {
+             clearTimeout(timerId);

            }
 
            }
 

-           behavior.off = function() {
-               _throttledUpdate.cancel();
-               _throttledUpdateTitle.cancel();
+           lastInvokeTime = 0;
+           lastArgs = lastCallTime = lastThis = timerId = undefined;
+         }
+
+         function flush() {
+           return timerId === undefined ? result : trailingEdge(now());
+         }
+
+         function debounced() {
+           var time = now(),
+               isInvoking = shouldInvoke(time);
+           lastArgs = arguments;
+           lastThis = this;
+           lastCallTime = time;

 
 

-               context.map()
-                   .on('move.behaviorHash', null);
+           if (isInvoking) {
+             if (timerId === undefined) {
+               return leadingEdge(lastCallTime);
+             }

 
 

-               context
-                   .on('enter.behaviorHash', null);
+             if (maxing) {
+               // Handle invocations in a tight loop.
+               clearTimeout(timerId);
+               timerId = setTimeout(timerExpired, wait);
+               return invokeFunc(lastCallTime);
+             }
+           }

 
 

-               select(window)
-                   .on('hashchange.behaviorHash', null);
+           if (timerId === undefined) {
+             timerId = setTimeout(timerExpired, wait);
+           }

 
 

-               window.location.hash = '';
-           };
+           return result;
+         }

 
 

-           return behavior;
+         debounced.cancel = cancel;
+         debounced.flush = flush;
+         return debounced;

        }
 
        /*
        }
 
        /*


@@ -55591,486 +54462,476 @@
            of entities that will require a redraw, taking into account
            child and parent relationships.
         */
            of entities that will require a redraw, taking into account
            child and parent relationships.
         */

-       function coreDifference(base, head) {
-           var _changes = {};
-           var _didChange = {};  // 'addition', 'deletion', 'geometry', 'properties'
-           var _diff = {};

 
 

-           function checkEntityID(id) {
-               var h = head.entities[id];
-               var b = base.entities[id];
+       function coreDifference(base, head) {
+         var _changes = {};
+         var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'

 
 

-               if (h === b) { return; }
-               if (_changes[id]) { return; }
+         var _diff = {};

 
 

-               if (!h && b) {
-                   _changes[id] = { base: b, head: h };
-                   _didChange.deletion = true;
-                   return;
-               }
-               if (h && !b) {
-                   _changes[id] = { base: b, head: h };
-                   _didChange.addition = true;
-                   return;
-               }
+         function checkEntityID(id) {
+           var h = head.entities[id];
+           var b = base.entities[id];
+           if (h === b) return;
+           if (_changes[id]) return;

 
 

-               if (h && b) {
-                   if (h.members && b.members && !fastDeepEqual(h.members, b.members)) {
-                       _changes[id] = { base: b, head: h };
-                       _didChange.geometry = true;
-                       _didChange.properties = true;
-                       return;
-                   }
-                   if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
-                       _changes[id] = { base: b, head: h };
-                       _didChange.geometry = true;
-                   }
-                   if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
-                       _changes[id] = { base: b, head: h };
-                       _didChange.geometry = true;
-                   }
-                   if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
-                       _changes[id] = { base: b, head: h };
-                       _didChange.properties = true;
-                   }
-               }
+           if (!h && b) {
+             _changes[id] = {
+               base: b,
+               head: h
+             };
+             _didChange.deletion = true;
+             return;

            }
 
            }
 

-           function load() {
-               // HOT CODE: there can be many thousands of downloaded entities, so looping
-               // through them all can become a performance bottleneck. Optimize by
-               // resolving duplicates and using a basic `for` loop
-               var ids = utilArrayUniq(Object.keys(head.entities).concat(Object.keys(base.entities)));
-               for (var i = 0; i < ids.length; i++) {
-                   checkEntityID(ids[i]);
-               }
+           if (h && !b) {
+             _changes[id] = {
+               base: b,
+               head: h
+             };
+             _didChange.addition = true;
+             return;

            }
            }

-           load();

 
 

+           if (h && b) {
+             if (h.members && b.members && !fastDeepEqual(h.members, b.members)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.geometry = true;
+               _didChange.properties = true;
+               return;
+             }

 
 

-           _diff.length = function length() {
-               return Object.keys(_changes).length;
-           };
+             if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.geometry = true;
+             }

 
 

+             if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.geometry = true;
+             }

 
 

-           _diff.changes = function changes() {
-               return _changes;
-           };
+             if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.properties = true;
+             }
+           }
+         }

 
 

-           _diff.didChange = _didChange;
+         function load() {
+           // HOT CODE: there can be many thousands of downloaded entities, so looping
+           // through them all can become a performance bottleneck. Optimize by
+           // resolving duplicates and using a basic `for` loop
+           var ids = utilArrayUniq(Object.keys(head.entities).concat(Object.keys(base.entities)));

 
 

+           for (var i = 0; i < ids.length; i++) {
+             checkEntityID(ids[i]);
+           }
+         }

 
 

-           // pass true to include affected relation members
-           _diff.extantIDs = function extantIDs(includeRelMembers) {
-               var result = new Set();
-               Object.keys(_changes).forEach(function(id) {
-                   if (_changes[id].head) {
-                       result.add(id);
-                   }
+         load();

 
 

-                   var h = _changes[id].head;
-                   var b = _changes[id].base;
-                   var entity = h || b;
+         _diff.length = function length() {
+           return Object.keys(_changes).length;
+         };

 
 

-                   if (includeRelMembers && entity.type === 'relation') {
-                       var mh = h ? h.members.map(function(m) { return m.id; }) : [];
-                       var mb = b ? b.members.map(function(m) { return m.id; }) : [];
-                       utilArrayUnion(mh, mb).forEach(function(memberID) {
-                           if (head.hasEntity(memberID)) {
-                               result.add(memberID);
-                           }
-                       });
-                   }
-               });
+         _diff.changes = function changes() {
+           return _changes;
+         };

 
 

-               return Array.from(result);
-           };
+         _diff.didChange = _didChange; // pass true to include affected relation members

 
 

+         _diff.extantIDs = function extantIDs(includeRelMembers) {
+           var result = new Set();
+           Object.keys(_changes).forEach(function (id) {
+             if (_changes[id].head) {
+               result.add(id);
+             }

 
 

-           _diff.modified = function modified() {
-               var result = [];
-               Object.values(_changes).forEach(function(change) {
-                   if (change.base && change.head) {
-                       result.push(change.head);
-                   }
+             var h = _changes[id].head;
+             var b = _changes[id].base;
+             var entity = h || b;
+
+             if (includeRelMembers && entity.type === 'relation') {
+               var mh = h ? h.members.map(function (m) {
+                 return m.id;
+               }) : [];
+               var mb = b ? b.members.map(function (m) {
+                 return m.id;
+               }) : [];
+               utilArrayUnion(mh, mb).forEach(function (memberID) {
+                 if (head.hasEntity(memberID)) {
+                   result.add(memberID);
+                 }

                });
                });

-               return result;
-           };
-
+             }
+           });
+           return Array.from(result);
+         };

 
 

-           _diff.created = function created() {
-               var result = [];
-               Object.values(_changes).forEach(function(change) {
-                   if (!change.base && change.head) {
-                       result.push(change.head);
-                   }
-               });
-               return result;
-           };
+         _diff.modified = function modified() {
+           var result = [];
+           Object.values(_changes).forEach(function (change) {
+             if (change.base && change.head) {
+               result.push(change.head);
+             }
+           });
+           return result;
+         };

 
 

+         _diff.created = function created() {
+           var result = [];
+           Object.values(_changes).forEach(function (change) {
+             if (!change.base && change.head) {
+               result.push(change.head);
+             }
+           });
+           return result;
+         };

 
 

-           _diff.deleted = function deleted() {
-               var result = [];
-               Object.values(_changes).forEach(function(change) {
-                   if (change.base && !change.head) {
-                       result.push(change.base);
-                   }
-               });
-               return result;
-           };
+         _diff.deleted = function deleted() {
+           var result = [];
+           Object.values(_changes).forEach(function (change) {
+             if (change.base && !change.head) {
+               result.push(change.base);
+             }
+           });
+           return result;
+         };

 
 

+         _diff.summary = function summary() {
+           var relevant = {};
+           var keys = Object.keys(_changes);

 
 

-           _diff.summary = function summary() {
-               var relevant = {};
+           for (var i = 0; i < keys.length; i++) {
+             var change = _changes[keys[i]];

 
 

-               var keys = Object.keys(_changes);
-               for (var i = 0; i < keys.length; i++) {
-                   var change = _changes[keys[i]];
+             if (change.head && change.head.geometry(head) !== 'vertex') {
+               addEntity(change.head, head, change.base ? 'modified' : 'created');
+             } else if (change.base && change.base.geometry(base) !== 'vertex') {
+               addEntity(change.base, base, 'deleted');
+             } else if (change.base && change.head) {
+               // modified vertex
+               var moved = !fastDeepEqual(change.base.loc, change.head.loc);
+               var retagged = !fastDeepEqual(change.base.tags, change.head.tags);

 
 

-                   if (change.head && change.head.geometry(head) !== 'vertex') {
-                       addEntity(change.head, head, change.base ? 'modified' : 'created');
+               if (moved) {
+                 addParents(change.head);
+               }

 
 

-                   } else if (change.base && change.base.geometry(base) !== 'vertex') {
-                       addEntity(change.base, base, 'deleted');
+               if (retagged || moved && change.head.hasInterestingTags()) {
+                 addEntity(change.head, head, 'modified');
+               }
+             } else if (change.head && change.head.hasInterestingTags()) {
+               // created vertex
+               addEntity(change.head, head, 'created');
+             } else if (change.base && change.base.hasInterestingTags()) {
+               // deleted vertex
+               addEntity(change.base, base, 'deleted');
+             }
+           }

 
 

-                   } else if (change.base && change.head) { // modified vertex
-                       var moved    = !fastDeepEqual(change.base.loc,  change.head.loc);
-                       var retagged = !fastDeepEqual(change.base.tags, change.head.tags);
+           return Object.values(relevant);

 
 

-                       if (moved) {
-                           addParents(change.head);
-                       }
+           function addEntity(entity, graph, changeType) {
+             relevant[entity.id] = {
+               entity: entity,
+               graph: graph,
+               changeType: changeType
+             };
+           }

 
 

-                       if (retagged || (moved && change.head.hasInterestingTags())) {
-                           addEntity(change.head, head, 'modified');
-                       }
+           function addParents(entity) {
+             var parents = head.parentWays(entity);

 
 

-                   } else if (change.head && change.head.hasInterestingTags()) { // created vertex
-                       addEntity(change.head, head, 'created');
+             for (var j = parents.length - 1; j >= 0; j--) {
+               var parent = parents[j];

 
 

-                   } else if (change.base && change.base.hasInterestingTags()) { // deleted vertex
-                       addEntity(change.base, base, 'deleted');
-                   }
+               if (!(parent.id in relevant)) {
+                 addEntity(parent, head, 'modified');

                }
                }

+             }
+           }
+         }; // returns complete set of entities that require a redraw
+         //  (optionally within given `extent`)

 
 

-               return Object.values(relevant);
-
-
-               function addEntity(entity, graph, changeType) {
-                   relevant[entity.id] = {
-                       entity: entity,
-                       graph: graph,
-                       changeType: changeType
-                   };
-               }

 
 

-               function addParents(entity) {
-                   var parents = head.parentWays(entity);
-                   for (var j = parents.length - 1; j >= 0; j--) {
-                       var parent = parents[j];
-                       if (!(parent.id in relevant)) {
-                           addEntity(parent, head, 'modified');
-                       }
-                   }
-               }
-           };
+         _diff.complete = function complete(extent) {
+           var result = {};
+           var id, change;

 
 

+           for (id in _changes) {
+             change = _changes[id];
+             var h = change.head;
+             var b = change.base;
+             var entity = h || b;
+             var i;

 
 

-           // returns complete set of entities that require a redraw
-           //  (optionally within given `extent`)
-           _diff.complete = function complete(extent) {
-               var result = {};
-               var id, change;
+             if (extent && (!h || !h.intersects(extent, head)) && (!b || !b.intersects(extent, base))) {
+               continue;
+             }

 
 

-               for (id in _changes) {
-                   change = _changes[id];
+             result[id] = h;

 
 

-                   var h = change.head;
-                   var b = change.base;
-                   var entity = h || b;
-                   var i;
+             if (entity.type === 'way') {
+               var nh = h ? h.nodes : [];
+               var nb = b ? b.nodes : [];
+               var diff;
+               diff = utilArrayDifference(nh, nb);

 
 

-                   if (extent &&
-                       (!h || !h.intersects(extent, head)) &&
-                       (!b || !b.intersects(extent, base)))
-                       { continue; }
+               for (i = 0; i < diff.length; i++) {
+                 result[diff[i]] = head.hasEntity(diff[i]);
+               }

 
 

-                   result[id] = h;
+               diff = utilArrayDifference(nb, nh);

 
 

-                   if (entity.type === 'way') {
-                       var nh = h ? h.nodes : [];
-                       var nb = b ? b.nodes : [];
-                       var diff;
+               for (i = 0; i < diff.length; i++) {
+                 result[diff[i]] = head.hasEntity(diff[i]);
+               }
+             }

 
 

-                       diff = utilArrayDifference(nh, nb);
-                       for (i = 0; i < diff.length; i++) {
-                           result[diff[i]] = head.hasEntity(diff[i]);
-                       }
+             if (entity.type === 'relation' && entity.isMultipolygon()) {
+               var mh = h ? h.members.map(function (m) {
+                 return m.id;
+               }) : [];
+               var mb = b ? b.members.map(function (m) {
+                 return m.id;
+               }) : [];
+               var ids = utilArrayUnion(mh, mb);

 
 

-                       diff = utilArrayDifference(nb, nh);
-                       for (i = 0; i < diff.length; i++) {
-                           result[diff[i]] = head.hasEntity(diff[i]);
-                       }
-                   }
+               for (i = 0; i < ids.length; i++) {
+                 var member = head.hasEntity(ids[i]);
+                 if (!member) continue; // not downloaded

 
 

-                   if (entity.type === 'relation' && entity.isMultipolygon()) {
-                       var mh = h ? h.members.map(function(m) { return m.id; }) : [];
-                       var mb = b ? b.members.map(function(m) { return m.id; }) : [];
-                       var ids = utilArrayUnion(mh, mb);
-                       for (i = 0; i < ids.length; i++) {
-                           var member = head.hasEntity(ids[i]);
-                           if (!member) { continue; }   // not downloaded
-                           if (extent && !member.intersects(extent, head)) { continue; }   // not visible
-                           result[ids[i]] = member;
-                       }
-                   }
+                 if (extent && !member.intersects(extent, head)) continue; // not visible

 
 

-                   addParents(head.parentWays(entity), result);
-                   addParents(head.parentRelations(entity), result);
+                 result[ids[i]] = member;

                }
                }

+             }

 
 

-               return result;
-
-
-               function addParents(parents, result) {
-                   for (var i = 0; i < parents.length; i++) {
-                       var parent = parents[i];
-                       if (parent.id in result) { continue; }
+             addParents(head.parentWays(entity), result);
+             addParents(head.parentRelations(entity), result);
+           }

 
 

-                       result[parent.id] = parent;
-                       addParents(head.parentRelations(parent), result);
-                   }
-               }
-           };
+           return result;

 
 

+           function addParents(parents, result) {
+             for (var i = 0; i < parents.length; i++) {
+               var parent = parents[i];
+               if (parent.id in result) continue;
+               result[parent.id] = parent;
+               addParents(head.parentRelations(parent), result);
+             }
+           }
+         };

 
 

-           return _diff;
+         return _diff;

        }
 
        function coreTree(head) {
        }
 
        function coreTree(head) {

-           // tree for entities
-           var _rtree = new RBush();
-           var _bboxes = {};
-
-           // maintain a separate tree for granular way segments
-           var _segmentsRTree = new RBush();
-           var _segmentsBBoxes = {};
-           var _segmentsByWayId = {};
-
-           var tree = {};
+         // tree for entities
+         var _rtree = new RBush();

 
 

+         var _bboxes = {}; // maintain a separate tree for granular way segments

 
 

-           function entityBBox(entity) {
-               var bbox = entity.extent(head).bbox();
-               bbox.id = entity.id;
-               _bboxes[entity.id] = bbox;
-               return bbox;
-           }
+         var _segmentsRTree = new RBush();

 
 

+         var _segmentsBBoxes = {};
+         var _segmentsByWayId = {};
+         var tree = {};

 
 

-           function segmentBBox(segment) {
-               var extent = segment.extent(head);
-               // extent can be null if the node entites aren't in the graph for some reason
-               if (!extent) { return null; }
+         function entityBBox(entity) {
+           var bbox = entity.extent(head).bbox();
+           bbox.id = entity.id;
+           _bboxes[entity.id] = bbox;
+           return bbox;
+         }

 
 

-               var bbox = extent.bbox();
-               bbox.segment = segment;
-               _segmentsBBoxes[segment.id] = bbox;
-               return bbox;
-           }
+         function segmentBBox(segment) {
+           var extent = segment.extent(head); // extent can be null if the node entities aren't in the graph for some reason

 
 

+           if (!extent) return null;
+           var bbox = extent.bbox();
+           bbox.segment = segment;
+           _segmentsBBoxes[segment.id] = bbox;
+           return bbox;
+         }

 
 

-           function removeEntity(entity) {
-               _rtree.remove(_bboxes[entity.id]);
-               delete _bboxes[entity.id];
+         function removeEntity(entity) {
+           _rtree.remove(_bboxes[entity.id]);

 
 

-               if (_segmentsByWayId[entity.id]) {
-                   _segmentsByWayId[entity.id].forEach(function(segment) {
-                       _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
-                       delete _segmentsBBoxes[segment.id];
-                   });
-                   delete _segmentsByWayId[entity.id];
-               }
-           }
+           delete _bboxes[entity.id];

 
 

+           if (_segmentsByWayId[entity.id]) {
+             _segmentsByWayId[entity.id].forEach(function (segment) {
+               _segmentsRTree.remove(_segmentsBBoxes[segment.id]);

 
 

-           function loadEntities(entities) {
-               _rtree.load(entities.map(entityBBox));
+               delete _segmentsBBoxes[segment.id];
+             });

 
 

-               var segments = [];
-               entities.forEach(function(entity) {
-                   if (entity.segments) {
-                       var entitySegments = entity.segments(head);
-                       // cache these to make them easy to remove later
-                       _segmentsByWayId[entity.id] = entitySegments;
-                       segments = segments.concat(entitySegments);
-                   }
-               });
-               if (segments.length) { _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean)); }
+             delete _segmentsByWayId[entity.id];

            }
            }

+         }

 
 

+         function loadEntities(entities) {
+           _rtree.load(entities.map(entityBBox));

 
 

-           function updateParents(entity, insertions, memo) {
-               head.parentWays(entity).forEach(function(way) {
-                   if (_bboxes[way.id]) {
-                       removeEntity(way);
-                       insertions[way.id] = way;
-                   }
-                   updateParents(way, insertions, memo);
-               });
-
-               head.parentRelations(entity).forEach(function(relation) {
-                   if (memo[entity.id]) { return; }
-                   memo[entity.id] = true;
-                   if (_bboxes[relation.id]) {
-                       removeEntity(relation);
-                       insertions[relation.id] = relation;
-                   }
-                   updateParents(relation, insertions, memo);
-               });
-           }
+           var segments = [];
+           entities.forEach(function (entity) {
+             if (entity.segments) {
+               var entitySegments = entity.segments(head); // cache these to make them easy to remove later

 
 

+               _segmentsByWayId[entity.id] = entitySegments;
+               segments = segments.concat(entitySegments);
+             }
+           });
+           if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
+         }

 
 

-           tree.rebase = function(entities, force) {
-               var insertions = {};
+         function updateParents(entity, insertions, memo) {
+           head.parentWays(entity).forEach(function (way) {
+             if (_bboxes[way.id]) {
+               removeEntity(way);
+               insertions[way.id] = way;
+             }

 
 

-               for (var i = 0; i < entities.length; i++) {
-                   var entity = entities[i];
-                   if (!entity.visible) { continue; }
+             updateParents(way, insertions, memo);
+           });
+           head.parentRelations(entity).forEach(function (relation) {
+             if (memo[entity.id]) return;
+             memo[entity.id] = true;

 
 

-                   if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
-                       if (!force) {
-                           continue;
-                       } else if (_bboxes[entity.id]) {
-                           removeEntity(entity);
-                       }
-                   }
+             if (_bboxes[relation.id]) {
+               removeEntity(relation);
+               insertions[relation.id] = relation;
+             }

 
 

-                   insertions[entity.id] = entity;
-                   updateParents(entity, insertions, {});
-               }
+             updateParents(relation, insertions, memo);
+           });
+         }

 
 

-               loadEntities(Object.values(insertions));
+         tree.rebase = function (entities, force) {
+           var insertions = {};

 
 

-               return tree;
-           };
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             if (!entity.visible) continue;

 
 

+             if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
+               if (!force) {
+                 continue;
+               } else if (_bboxes[entity.id]) {
+                 removeEntity(entity);
+               }
+             }

 
 

-           function updateToGraph(graph) {
-               if (graph === head) { return; }
+             insertions[entity.id] = entity;
+             updateParents(entity, insertions, {});
+           }

 
 

-               var diff = coreDifference(head, graph);
+           loadEntities(Object.values(insertions));
+           return tree;
+         };

 
 

-               head = graph;
+         function updateToGraph(graph) {
+           if (graph === head) return;
+           var diff = coreDifference(head, graph);
+           head = graph;
+           var changed = diff.didChange;
+           if (!changed.addition && !changed.deletion && !changed.geometry) return;
+           var insertions = {};

 
 

-               var changed = diff.didChange;
-               if (!changed.addition && !changed.deletion && !changed.geometry) { return; }
+           if (changed.deletion) {
+             diff.deleted().forEach(function (entity) {
+               removeEntity(entity);
+             });
+           }

 
 

-               var insertions = {};
+           if (changed.geometry) {
+             diff.modified().forEach(function (entity) {
+               removeEntity(entity);
+               insertions[entity.id] = entity;
+               updateParents(entity, insertions, {});
+             });
+           }

 
 

-               if (changed.deletion) {
-                   diff.deleted().forEach(function(entity) {
-                       removeEntity(entity);
-                   });
-               }
+           if (changed.addition) {
+             diff.created().forEach(function (entity) {
+               insertions[entity.id] = entity;
+             });
+           }

 
 

-               if (changed.geometry) {
-                   diff.modified().forEach(function(entity) {
-                       removeEntity(entity);
-                       insertions[entity.id] = entity;
-                       updateParents(entity, insertions, {});
-                   });
-               }
+           loadEntities(Object.values(insertions));
+         } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`

 
 

-               if (changed.addition) {
-                   diff.created().forEach(function(entity) {
-                       insertions[entity.id] = entity;
-                   });
-               }

 
 

-               loadEntities(Object.values(insertions));
-           }
+         tree.intersects = function (extent, graph) {
+           updateToGraph(graph);
+           return _rtree.search(extent.bbox()).map(function (bbox) {
+             return graph.entity(bbox.id);
+           });
+         }; // returns an array of segment objects with bounding boxes overlapping `extent` for the given `graph`

 
 

-           // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
-           tree.intersects = function(extent, graph) {
-               updateToGraph(graph);
-               return _rtree.search(extent.bbox())
-                   .map(function(bbox) { return graph.entity(bbox.id); });
-           };

 
 

-           // returns an array of segment objects with bounding boxes overlapping `extent` for the given `graph`
-           tree.waySegments = function(extent, graph) {
-               updateToGraph(graph);
-               return _segmentsRTree.search(extent.bbox())
-                   .map(function(bbox) { return bbox.segment; });
-           };
+         tree.waySegments = function (extent, graph) {
+           updateToGraph(graph);
+           return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
+             return bbox.segment;
+           });
+         };

 
 

+         return tree;
+       }

 
 

-           return tree;
+       function svgIcon(name, svgklass, useklass) {
+         return function drawIcon(selection) {
+           selection.selectAll('svg.icon' + (svgklass ? '.' + svgklass.split(' ')[0] : '')).data([0]).enter().append('svg').attr('class', 'icon ' + (svgklass || '')).append('use').attr('xlink:href', name).attr('class', useklass);
+         };

        }
 
        function uiModal(selection, blocking) {
        }
 
        function uiModal(selection, blocking) {

-         var this$1 = this;
+         var _this = this;

 
          var keybinding = utilKeybinding('modal');
          var previous = selection.select('div.modal');
          var animate = previous.empty();
 
          var keybinding = utilKeybinding('modal');
          var previous = selection.select('div.modal');
          var animate = previous.empty();

-
-         previous.transition()
-           .duration(200)
-           .style('opacity', 0)
-           .remove();
-
-         var shaded = selection
-           .append('div')
-           .attr('class', 'shaded')
-           .style('opacity', 0);
+         previous.transition().duration(200).style('opacity', 0).remove();
+         var shaded = selection.append('div').attr('class', 'shaded').style('opacity', 0);

 
          shaded.close = function () {
 
          shaded.close = function () {

-           shaded
-             .transition()
-             .duration(200)
-             .style('opacity',0)
-             .remove();
-
-           modal
-             .transition()
-             .duration(200)
-             .style('top','0px');
-
-           select(document)
-             .call(keybinding.unbind);
+           shaded.transition().duration(200).style('opacity', 0).remove();
+           modal.transition().duration(200).style('top', '0px');
+           select(document).call(keybinding.unbind);

          };
 
          };
 

-
-         var modal = shaded
-           .append('div')
-           .attr('class', 'modal fillL');
+         var modal = shaded.append('div').attr('class', 'modal fillL');
+         modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);

 
          if (!blocking) {
 
          if (!blocking) {

-           shaded.on('click.remove-modal', function () {
-             if (event.target === this$1) {
+           shaded.on('click.remove-modal', function (d3_event) {
+             if (d3_event.target === _this) {

                shaded.close();
              }
            });
                shaded.close();
              }
            });

-
-           modal
-             .append('button')
-             .attr('class', 'close')
-             .on('click', shaded.close)
-             .call(svgIcon('#iD-icon-close'));
-
-           keybinding
-             .on('⌫', shaded.close)
-             .on('⎋', shaded.close);
-
-           select(document)
-             .call(keybinding);
+           modal.append('button').attr('class', 'close').on('click', shaded.close).call(svgIcon('#iD-icon-close'));
+           keybinding.on('⌫', shaded.close).on('⎋', shaded.close);
+           select(document).call(keybinding);

          }
 
          }
 

-         modal
-           .append('div')
-           .attr('class', 'content');
+         modal.append('div').attr('class', 'content');
+         modal.append('input').attr('class', 'keytrap keytrap-last').on('focus.keytrap', moveFocusToFirst);

 
          if (animate) {
            shaded.transition().style('opacity', 1);
 
          if (animate) {
            shaded.transition().style('opacity', 1);


@@ -56079,795 +54940,771 @@
          }
 
          return shaded;
          }
 
          return shaded;

+
+         function moveFocusToFirst() {
+           var node = modal // there are additional rules about what's focusable, but this suits our purposes
+           .select('a, button, input:not(.keytrap), select, textarea').node();
+
+           if (node) {
+             node.focus();
+           } else {
+             select(this).node().blur();
+           }
+         }
+
+         function moveFocusToLast() {
+           var nodes = modal.selectAll('a, button, input:not(.keytrap), select, textarea').nodes();
+
+           if (nodes.length) {
+             nodes[nodes.length - 1].focus();
+           } else {
+             select(this).node().blur();
+           }
+         }

        }
 
        function uiLoading(context) {
          var _modalSelection = select(null);
        }
 
        function uiLoading(context) {
          var _modalSelection = select(null);

+

          var _message = '';
          var _blocking = false;
 
          var _message = '';
          var _blocking = false;
 

-
-         var loading = function (selection) {
+         var loading = function loading(selection) {

            _modalSelection = uiModal(selection, _blocking);
 
            _modalSelection = uiModal(selection, _blocking);
 

-           var loadertext = _modalSelection.select('.content')
-             .classed('loading-modal', true)
-             .append('div')
-             .attr('class', 'modal-section fillL');
+           var loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');

 
 

-           loadertext
-             .append('img')
-             .attr('class', 'loader')
-             .attr('src', context.imagePath('loader-white.gif'));
+           loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
+           loadertext.append('h3').html(_message);

 
 

-           loadertext
-             .append('h3')
-             .text(_message);
-
-           _modalSelection.select('button.close')
-             .attr('class', 'hide');
+           _modalSelection.select('button.close').attr('class', 'hide');

 
            return loading;
          };
 
 
            return loading;
          };
 

-
-         loading.message = function(val) {
-           if (!arguments.length) { return _message; }
+         loading.message = function (val) {
+           if (!arguments.length) return _message;

            _message = val;
            return loading;
          };
 
            _message = val;
            return loading;
          };
 

-
-         loading.blocking = function(val) {
-           if (!arguments.length) { return _blocking; }
+         loading.blocking = function (val) {
+           if (!arguments.length) return _blocking;

            _blocking = val;
            return loading;
          };
 
            _blocking = val;
            return loading;
          };
 

-

          loading.close = function () {
            _modalSelection.remove();
          };
 
          loading.close = function () {
            _modalSelection.remove();
          };
 

-

          loading.isShown = function () {
            return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
          };
 
          loading.isShown = function () {
            return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
          };
 

-

          return loading;
        }
 
        function coreHistory(context) {
          return loading;
        }
 
        function coreHistory(context) {

-           var dispatch$1 = dispatch('change', 'merge', 'restore', 'undone', 'redone');
-           var lock = utilSessionMutex('lock');
+         var dispatch = dispatch$8('reset', 'change', 'merge', 'restore', 'undone', 'redone', 'storage_error');

 
 

-           // restorable if iD not open in another window/tab and a saved history exists in localStorage
-           var _hasUnresolvedRestorableChanges = lock.lock() && !!corePreferences(getKey('saved_history'));
+         var _lock = utilSessionMutex('lock'); // restorable if iD not open in another window/tab and a saved history exists in localStorage

 
 

-           var duration = 150;
-           var _imageryUsed = [];
-           var _photoOverlaysUsed = [];
-           var _checkpoints = {};
-           var _pausedGraph;
-           var _stack;
-           var _index;
-           var _tree;

 
 

+         var _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));

 
 

-           // internal _act, accepts list of actions and eased time
-           function _act(actions, t) {
-               actions = Array.prototype.slice.call(actions);
-
-               var annotation;
-               if (typeof actions[actions.length - 1] !== 'function') {
-                   annotation = actions.pop();
-               }
-
-               var graph = _stack[_index].graph;
-               for (var i = 0; i < actions.length; i++) {
-                   graph = actions[i](graph, t);
-               }
-
-               return {
-                   graph: graph,
-                   annotation: annotation,
-                   imageryUsed: _imageryUsed,
-                   photoOverlaysUsed: _photoOverlaysUsed,
-                   transform: context.projection.transform(),
-                   selectedIDs: context.selectedIDs()
-               };
-           }
-
+         var duration = 150;
+         var _imageryUsed = [];
+         var _photoOverlaysUsed = [];
+         var _checkpoints = {};

 
 

-           // internal _perform with eased time
-           function _perform(args, t) {
-               var previous = _stack[_index].graph;
-               _stack = _stack.slice(0, _index + 1);
-               var actionResult = _act(args, t);
-               _stack.push(actionResult);
-               _index++;
-               return change(previous);
-           }
+         var _pausedGraph;

 
 

+         var _stack;

 
 

-           // internal _replace with eased time
-           function _replace(args, t) {
-               var previous = _stack[_index].graph;
-               // assert(_index == _stack.length - 1)
-               var actionResult = _act(args, t);
-               _stack[_index] = actionResult;
-               return change(previous);
-           }
+         var _index;

 
 

+         var _tree; // internal _act, accepts list of actions and eased time

 
 

-           // internal _overwrite with eased time
-           function _overwrite(args, t) {
-               var previous = _stack[_index].graph;
-               if (_index > 0) {
-                   _index--;
-                   _stack.pop();
-               }
-               _stack = _stack.slice(0, _index + 1);
-               var actionResult = _act(args, t);
-               _stack.push(actionResult);
-               _index++;
-               return change(previous);
-           }

 
 

+         function _act(actions, t) {
+           actions = Array.prototype.slice.call(actions);
+           var annotation;

 
 

-           // determine difference and dispatch a change event
-           function change(previous) {
-               var difference = coreDifference(previous, history.graph());
-               if (!_pausedGraph) {
-                   dispatch$1.call('change', this, difference);
-               }
-               return difference;
+           if (typeof actions[actions.length - 1] !== 'function') {
+             annotation = actions.pop();

            }
 
            }
 

+           var graph = _stack[_index].graph;

 
 

-           // iD uses namespaced keys so multiple installations do not conflict
-           function getKey(n) {
-               return 'iD_' + window.location.origin + '_' + n;
+           for (var i = 0; i < actions.length; i++) {
+             graph = actions[i](graph, t);

            }
 
            }
 

+           return {
+             graph: graph,
+             annotation: annotation,
+             imageryUsed: _imageryUsed,
+             photoOverlaysUsed: _photoOverlaysUsed,
+             transform: context.projection.transform(),
+             selectedIDs: context.selectedIDs()
+           };
+         } // internal _perform with eased time

 
 

-           var history = {
-
-               graph: function() {
-                   return _stack[_index].graph;
-               },
-
-
-               tree: function() {
-                   return _tree;
-               },
-
-
-               base: function() {
-                   return _stack[0].graph;
-               },
-
-
-               merge: function(entities/*, extent*/) {
-                   var stack = _stack.map(function(state) { return state.graph; });
-                   _stack[0].graph.rebase(entities, stack, false);
-                   _tree.rebase(entities, false);
-
-                   dispatch$1.call('merge', this, entities);
-               },
-
-
-               perform: function() {
-                   // complete any transition already in progress
-                   select(document).interrupt('history.perform');
-
-                   var transitionable = false;
-                   var action0 = arguments[0];
-
-                   if (arguments.length === 1 ||
-                       (arguments.length === 2 && (typeof arguments[1] !== 'function'))) {
-                       transitionable = !!action0.transitionable;
-                   }
-
-                   if (transitionable) {
-                       var origArguments = arguments;
-                       select(document)
-                           .transition('history.perform')
-                           .duration(duration)
-                           .ease(linear$1)
-                           .tween('history.tween', function() {
-                               return function(t) {
-                                   if (t < 1) { _overwrite([action0], t); }
-                               };
-                           })
-                           .on('start', function() {
-                               _perform([action0], 0);
-                           })
-                           .on('end interrupt', function() {
-                               _overwrite(origArguments, 1);
-                           });
-
-                   } else {
-                       return _perform(arguments);
-                   }
-               },

 
 

+         function _perform(args, t) {
+           var previous = _stack[_index].graph;
+           _stack = _stack.slice(0, _index + 1);

 
 

-               replace: function() {
-                   select(document).interrupt('history.perform');
-                   return _replace(arguments, 1);
-               },
+           var actionResult = _act(args, t);

 
 

+           _stack.push(actionResult);

 
 

-               // Same as calling pop and then perform
-               overwrite: function() {
-                   select(document).interrupt('history.perform');
-                   return _overwrite(arguments, 1);
-               },
+           _index++;
+           return change(previous);
+         } // internal _replace with eased time

 
 
 
 

-               pop: function(n) {
-                   select(document).interrupt('history.perform');
+         function _replace(args, t) {
+           var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)

 
 

-                   var previous = _stack[_index].graph;
-                   if (isNaN(+n) || +n < 0) {
-                       n = 1;
-                   }
-                   while (n-- > 0 && _index > 0) {
-                       _index--;
-                       _stack.pop();
-                   }
-                   return change(previous);
-               },
+           var actionResult = _act(args, t);

 
 

+           _stack[_index] = actionResult;
+           return change(previous);
+         } // internal _overwrite with eased time

 
 

-               // Back to the previous annotated state or _index = 0.
-               undo: function() {
-                   select(document).interrupt('history.perform');

 
 

-                   var previousStack = _stack[_index];
-                   var previous = previousStack.graph;
-                   while (_index > 0) {
-                       _index--;
-                       if (_stack[_index].annotation) { break; }
-                   }
+         function _overwrite(args, t) {
+           var previous = _stack[_index].graph;

 
 

-                   dispatch$1.call('undone', this, _stack[_index], previousStack);
-                   return change(previous);
-               },
+           if (_index > 0) {
+             _index--;

 
 

+             _stack.pop();
+           }

 
 

-               // Forward to the next annotated state.
-               redo: function() {
-                   select(document).interrupt('history.perform');
+           _stack = _stack.slice(0, _index + 1);

 
 

-                   var previousStack = _stack[_index];
-                   var previous = previousStack.graph;
-                   var tryIndex = _index;
-                   while (tryIndex < _stack.length - 1) {
-                       tryIndex++;
-                       if (_stack[tryIndex].annotation) {
-                           _index = tryIndex;
-                           dispatch$1.call('redone', this, _stack[_index], previousStack);
-                           break;
-                       }
-                   }
+           var actionResult = _act(args, t);

 
 

-                   return change(previous);
-               },
+           _stack.push(actionResult);

 
 

+           _index++;
+           return change(previous);
+         } // determine difference and dispatch a change event

 
 

-               pauseChangeDispatch: function() {
-                   if (!_pausedGraph) {
-                       _pausedGraph = _stack[_index].graph;
-                   }
-               },

 
 

+         function change(previous) {
+           var difference = coreDifference(previous, history.graph());

 
 

-               resumeChangeDispatch: function() {
-                   if (_pausedGraph) {
-                       var previous = _pausedGraph;
-                       _pausedGraph = null;
-                       return change(previous);
-                   }
-               },
+           if (!_pausedGraph) {
+             dispatch.call('change', this, difference);
+           }

 
 

+           return difference;
+         } // iD uses namespaced keys so multiple installations do not conflict

 
 

-               undoAnnotation: function() {
-                   var i = _index;
-                   while (i >= 0) {
-                       if (_stack[i].annotation) { return _stack[i].annotation; }
-                       i--;
-                   }
-               },

 
 

+         function getKey(n) {
+           return 'iD_' + window.location.origin + '_' + n;
+         }

 
 

-               redoAnnotation: function() {
-                   var i = _index + 1;
-                   while (i <= _stack.length - 1) {
-                       if (_stack[i].annotation) { return _stack[i].annotation; }
-                       i++;
-                   }
-               },
+         var history = {
+           graph: function graph() {
+             return _stack[_index].graph;
+           },
+           tree: function tree() {
+             return _tree;
+           },
+           base: function base() {
+             return _stack[0].graph;
+           },
+           merge: function merge(entities
+           /*, extent*/
+           ) {
+             var stack = _stack.map(function (state) {
+               return state.graph;
+             });

 
 

+             _stack[0].graph.rebase(entities, stack, false);

 
 

-               // Returns the entities from the active graph with bounding boxes
-               // overlapping the given `extent`.
-               intersects: function(extent) {
-                   return _tree.intersects(extent, _stack[_index].graph);
-               },
+             _tree.rebase(entities, false);

 
 

+             dispatch.call('merge', this, entities);
+           },
+           perform: function perform() {
+             // complete any transition already in progress
+             select(document).interrupt('history.perform');
+             var transitionable = false;
+             var action0 = arguments[0];

 
 

-               difference: function() {
-                   var base = _stack[0].graph;
-                   var head = _stack[_index].graph;
-                   return coreDifference(base, head);
-               },
+             if (arguments.length === 1 || arguments.length === 2 && typeof arguments[1] !== 'function') {
+               transitionable = !!action0.transitionable;
+             }

 
 

+             if (transitionable) {
+               var origArguments = arguments;
+               select(document).transition('history.perform').duration(duration).ease(linear$1).tween('history.tween', function () {
+                 return function (t) {
+                   if (t < 1) _overwrite([action0], t);
+                 };
+               }).on('start', function () {
+                 _perform([action0], 0);
+               }).on('end interrupt', function () {
+                 _overwrite(origArguments, 1);
+               });
+             } else {
+               return _perform(arguments);
+             }
+           },
+           replace: function replace() {
+             select(document).interrupt('history.perform');
+             return _replace(arguments, 1);
+           },
+           // Same as calling pop and then perform
+           overwrite: function overwrite() {
+             select(document).interrupt('history.perform');
+             return _overwrite(arguments, 1);
+           },
+           pop: function pop(n) {
+             select(document).interrupt('history.perform');
+             var previous = _stack[_index].graph;

 
 

-               changes: function(action) {
-                   var base = _stack[0].graph;
-                   var head = _stack[_index].graph;
+             if (isNaN(+n) || +n < 0) {
+               n = 1;
+             }

 
 

-                   if (action) {
-                       head = action(head);
-                   }
+             while (n-- > 0 && _index > 0) {
+               _index--;

 
 

-                   var difference = coreDifference(base, head);
+               _stack.pop();
+             }

 
 

-                   return {
-                       modified: difference.modified(),
-                       created: difference.created(),
-                       deleted: difference.deleted()
-                   };
-               },
+             return change(previous);
+           },
+           // Back to the previous annotated state or _index = 0.
+           undo: function undo() {
+             select(document).interrupt('history.perform');
+             var previousStack = _stack[_index];
+             var previous = previousStack.graph;

 
 

+             while (_index > 0) {
+               _index--;
+               if (_stack[_index].annotation) break;
+             }

 
 

-               hasChanges: function() {
-                   return this.difference().length() > 0;
-               },
+             dispatch.call('undone', this, _stack[_index], previousStack);
+             return change(previous);
+           },
+           // Forward to the next annotated state.
+           redo: function redo() {
+             select(document).interrupt('history.perform');
+             var previousStack = _stack[_index];
+             var previous = previousStack.graph;
+             var tryIndex = _index;

 
 

+             while (tryIndex < _stack.length - 1) {
+               tryIndex++;

 
 

-               imageryUsed: function(sources) {
-                   if (sources) {
-                       _imageryUsed = sources;
-                       return history;
-                   } else {
-                       var s = new Set();
-                       _stack.slice(1, _index + 1).forEach(function(state) {
-                           state.imageryUsed.forEach(function(source) {
-                               if (source !== 'Custom') {
-                                   s.add(source);
-                               }
-                           });
-                       });
-                       return Array.from(s);
-                   }
-               },
+               if (_stack[tryIndex].annotation) {
+                 _index = tryIndex;
+                 dispatch.call('redone', this, _stack[_index], previousStack);
+                 break;
+               }
+             }

 
 

+             return change(previous);
+           },
+           pauseChangeDispatch: function pauseChangeDispatch() {
+             if (!_pausedGraph) {
+               _pausedGraph = _stack[_index].graph;
+             }
+           },
+           resumeChangeDispatch: function resumeChangeDispatch() {
+             if (_pausedGraph) {
+               var previous = _pausedGraph;
+               _pausedGraph = null;
+               return change(previous);
+             }
+           },
+           undoAnnotation: function undoAnnotation() {
+             var i = _index;

 
 

-               photoOverlaysUsed: function(sources) {
-                   if (sources) {
-                       _photoOverlaysUsed = sources;
-                       return history;
-                   } else {
-                       var s = new Set();
-                       _stack.slice(1, _index + 1).forEach(function(state) {
-                           if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
-                               state.photoOverlaysUsed.forEach(function(photoOverlay) {
-                                   s.add(photoOverlay);
-                               });
-                           }
-                       });
-                       return Array.from(s);
-                   }
-               },
+             while (i >= 0) {
+               if (_stack[i].annotation) return _stack[i].annotation;
+               i--;
+             }
+           },
+           redoAnnotation: function redoAnnotation() {
+             var i = _index + 1;

 
 

+             while (i <= _stack.length - 1) {
+               if (_stack[i].annotation) return _stack[i].annotation;
+               i++;
+             }
+           },
+           // Returns the entities from the active graph with bounding boxes
+           // overlapping the given `extent`.
+           intersects: function intersects(extent) {
+             return _tree.intersects(extent, _stack[_index].graph);
+           },
+           difference: function difference() {
+             var base = _stack[0].graph;
+             var head = _stack[_index].graph;
+             return coreDifference(base, head);
+           },
+           changes: function changes(action) {
+             var base = _stack[0].graph;
+             var head = _stack[_index].graph;

 
 

-               // save the current history state
-               checkpoint: function(key) {
-                   _checkpoints[key] = {
-                       stack: _stack,
-                       index: _index
-                   };
-                   return history;
-               },
+             if (action) {
+               head = action(head);
+             }

 
 

+             var difference = coreDifference(base, head);
+             return {
+               modified: difference.modified(),
+               created: difference.created(),
+               deleted: difference.deleted()
+             };
+           },
+           hasChanges: function hasChanges() {
+             return this.difference().length() > 0;
+           },
+           imageryUsed: function imageryUsed(sources) {
+             if (sources) {
+               _imageryUsed = sources;
+               return history;
+             } else {
+               var s = new Set();

 
 

-               // restore history state to a given checkpoint or reset completely
-               reset: function(key) {
-                   if (key !== undefined && _checkpoints.hasOwnProperty(key)) {
-                       _stack = _checkpoints[key].stack;
-                       _index = _checkpoints[key].index;
-                   } else {
-                       _stack = [{graph: coreGraph()}];
-                       _index = 0;
-                       _tree = coreTree(_stack[0].graph);
-                       _checkpoints = {};
+               _stack.slice(1, _index + 1).forEach(function (state) {
+                 state.imageryUsed.forEach(function (source) {
+                   if (source !== 'Custom') {
+                     s.add(source);

                    }
                    }

-                   dispatch$1.call('change');
-                   return history;
-               },
-
+                 });
+               });

 
 

-               // `toIntroGraph()` is used to export the intro graph used by the walkthrough.
-               //
-               // To use it:
-               //  1. Start the walkthrough.
-               //  2. Get to a "free editing" tutorial step
-               //  3. Make your edits to the walkthrough map
-               //  4. In your browser dev console run:
-               //        `id.history().toIntroGraph()`
-               //  5. This outputs stringified JSON to the browser console
-               //  6. Copy it to `data/intro_graph.json` and prettify it in your code editor
-               toIntroGraph: function() {
-                   var nextID = { n: 0, r: 0, w: 0 };
-                   var permIDs = {};
-                   var graph = this.graph();
-                   var baseEntities = {};
-
-                   // clone base entities..
-                   Object.values(graph.base().entities).forEach(function(entity) {
-                       var copy = copyIntroEntity(entity);
-                       baseEntities[copy.id] = copy;
-                   });
+               return Array.from(s);
+             }
+           },
+           photoOverlaysUsed: function photoOverlaysUsed(sources) {
+             if (sources) {
+               _photoOverlaysUsed = sources;
+               return history;
+             } else {
+               var s = new Set();

 
 

-                   // replace base entities with head entities..
-                   Object.keys(graph.entities).forEach(function(id) {
-                       var entity = graph.entities[id];
-                       if (entity) {
-                           var copy = copyIntroEntity(entity);
-                           baseEntities[copy.id] = copy;
-                       } else {
-                           delete baseEntities[id];
-                       }
+               _stack.slice(1, _index + 1).forEach(function (state) {
+                 if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
+                   state.photoOverlaysUsed.forEach(function (photoOverlay) {
+                     s.add(photoOverlay);

                    });
                    });

+                 }
+               });

 
 

-                   // swap temporary for permanent ids..
-                   Object.values(baseEntities).forEach(function(entity) {
-                       if (Array.isArray(entity.nodes)) {
-                           entity.nodes = entity.nodes.map(function(node) {
-                               return permIDs[node] || node;
-                           });
-                       }
-                       if (Array.isArray(entity.members)) {
-                           entity.members = entity.members.map(function(member) {
-                               member.id = permIDs[member.id] || member.id;
-                               return member;
-                           });
-                       }
-                   });
+               return Array.from(s);
+             }
+           },
+           // save the current history state
+           checkpoint: function checkpoint(key) {
+             _checkpoints[key] = {
+               stack: _stack,
+               index: _index
+             };
+             return history;
+           },
+           // restore history state to a given checkpoint or reset completely
+           reset: function reset(key) {
+             if (key !== undefined && _checkpoints.hasOwnProperty(key)) {
+               _stack = _checkpoints[key].stack;
+               _index = _checkpoints[key].index;
+             } else {
+               _stack = [{
+                 graph: coreGraph()
+               }];
+               _index = 0;
+               _tree = coreTree(_stack[0].graph);
+               _checkpoints = {};
+             }

 
 

-                   return JSON.stringify({ dataIntroGraph: baseEntities });
+             dispatch.call('reset');
+             dispatch.call('change');
+             return history;
+           },
+           // `toIntroGraph()` is used to export the intro graph used by the walkthrough.
+           //
+           // To use it:
+           //  1. Start the walkthrough.
+           //  2. Get to a "free editing" tutorial step
+           //  3. Make your edits to the walkthrough map
+           //  4. In your browser dev console run:
+           //        `id.history().toIntroGraph()`
+           //  5. This outputs stringified JSON to the browser console
+           //  6. Copy it to `data/intro_graph.json` and prettify it in your code editor
+           toIntroGraph: function toIntroGraph() {
+             var nextID = {
+               n: 0,
+               r: 0,
+               w: 0
+             };
+             var permIDs = {};
+             var graph = this.graph();
+             var baseEntities = {}; // clone base entities..

 
 

+             Object.values(graph.base().entities).forEach(function (entity) {
+               var copy = copyIntroEntity(entity);
+               baseEntities[copy.id] = copy;
+             }); // replace base entities with head entities..

 
 

-                   function copyIntroEntity(source) {
-                       var copy = utilObjectOmit(source, ['type', 'user', 'v', 'version', 'visible']);
+             Object.keys(graph.entities).forEach(function (id) {
+               var entity = graph.entities[id];

 
 

-                       // Note: the copy is no longer an osmEntity, so it might not have `tags`
-                       if (copy.tags && !Object.keys(copy.tags)) {
-                           delete copy.tags;
-                       }
+               if (entity) {
+                 var copy = copyIntroEntity(entity);
+                 baseEntities[copy.id] = copy;
+               } else {
+                 delete baseEntities[id];
+               }
+             }); // swap temporary for permanent ids..

 
 

-                       if (Array.isArray(copy.loc)) {
-                           copy.loc[0] = +copy.loc[0].toFixed(6);
-                           copy.loc[1] = +copy.loc[1].toFixed(6);
-                       }
+             Object.values(baseEntities).forEach(function (entity) {
+               if (Array.isArray(entity.nodes)) {
+                 entity.nodes = entity.nodes.map(function (node) {
+                   return permIDs[node] || node;
+                 });
+               }

 
 

-                       var match = source.id.match(/([nrw])-\d*/);  // temporary id
-                       if (match !== null) {
-                           var nrw = match[1];
-                           var permID;
-                           do { permID = nrw + (++nextID[nrw]); }
-                           while (baseEntities.hasOwnProperty(permID));
+               if (Array.isArray(entity.members)) {
+                 entity.members = entity.members.map(function (member) {
+                   member.id = permIDs[member.id] || member.id;
+                   return member;
+                 });
+               }
+             });
+             return JSON.stringify({
+               dataIntroGraph: baseEntities
+             });

 
 

-                           copy.id = permIDs[source.id] = permID;
-                       }
-                       return copy;
-                   }
-               },
+             function copyIntroEntity(source) {
+               var copy = utilObjectOmit(source, ['type', 'user', 'v', 'version', 'visible']); // Note: the copy is no longer an osmEntity, so it might not have `tags`

 
 

+               if (copy.tags && !Object.keys(copy.tags)) {
+                 delete copy.tags;
+               }

 
 

-               toJSON: function() {
-                   if (!this.hasChanges()) { return; }
+               if (Array.isArray(copy.loc)) {
+                 copy.loc[0] = +copy.loc[0].toFixed(6);
+                 copy.loc[1] = +copy.loc[1].toFixed(6);
+               }

 
 

-                   var allEntities = {};
-                   var baseEntities = {};
-                   var base = _stack[0];
+               var match = source.id.match(/([nrw])-\d*/); // temporary id

 
 

-                   var s = _stack.map(function(i) {
-                       var modified = [];
-                       var deleted = [];
+               if (match !== null) {
+                 var nrw = match[1];
+                 var permID;

 
 

-                       Object.keys(i.graph.entities).forEach(function(id) {
-                           var entity = i.graph.entities[id];
-                           if (entity) {
-                               var key = osmEntity.key(entity);
-                               allEntities[key] = entity;
-                               modified.push(key);
-                           } else {
-                               deleted.push(id);
-                           }
+                 do {
+                   permID = nrw + ++nextID[nrw];
+                 } while (baseEntities.hasOwnProperty(permID));

 
 

-                           // make sure that the originals of changed or deleted entities get merged
-                           // into the base of the _stack after restoring the data from JSON.
-                           if (id in base.graph.entities) {
-                               baseEntities[id] = base.graph.entities[id];
-                           }
-                           if (entity && entity.nodes) {
-                               // get originals of pre-existing child nodes
-                               entity.nodes.forEach(function(nodeID) {
-                                   if (nodeID in base.graph.entities) {
-                                       baseEntities[nodeID] = base.graph.entities[nodeID];
-                                   }
-                               });
-                           }
-                           // get originals of parent entities too
-                           var baseParents = base.graph._parentWays[id];
-                           if (baseParents) {
-                               baseParents.forEach(function(parentID) {
-                                   if (parentID in base.graph.entities) {
-                                       baseEntities[parentID] = base.graph.entities[parentID];
-                                   }
-                               });
-                           }
-                       });
+                 copy.id = permIDs[source.id] = permID;
+               }

 
 

-                       var x = {};
+               return copy;
+             }
+           },
+           toJSON: function toJSON() {
+             if (!this.hasChanges()) return;
+             var allEntities = {};
+             var baseEntities = {};
+             var base = _stack[0];
+
+             var s = _stack.map(function (i) {
+               var modified = [];
+               var deleted = [];
+               Object.keys(i.graph.entities).forEach(function (id) {
+                 var entity = i.graph.entities[id];
+
+                 if (entity) {
+                   var key = osmEntity.key(entity);
+                   allEntities[key] = entity;
+                   modified.push(key);
+                 } else {
+                   deleted.push(id);
+                 } // make sure that the originals of changed or deleted entities get merged
+                 // into the base of the _stack after restoring the data from JSON.

 
 

-                       if (modified.length) { x.modified = modified; }
-                       if (deleted.length) { x.deleted = deleted; }
-                       if (i.imageryUsed) { x.imageryUsed = i.imageryUsed; }
-                       if (i.photoOverlaysUsed) { x.photoOverlaysUsed = i.photoOverlaysUsed; }
-                       if (i.annotation) { x.annotation = i.annotation; }
-                       if (i.transform) { x.transform = i.transform; }
-                       if (i.selectedIDs) { x.selectedIDs = i.selectedIDs; }

 
 

-                       return x;
-                   });
+                 if (id in base.graph.entities) {
+                   baseEntities[id] = base.graph.entities[id];
+                 }

 
 

-                   return JSON.stringify({
-                       version: 3,
-                       entities: Object.values(allEntities),
-                       baseEntities: Object.values(baseEntities),
-                       stack: s,
-                       nextIDs: osmEntity.id.next,
-                       index: _index,
-                       // note the time the changes were saved
-                       timestamp: (new Date()).getTime()
+                 if (entity && entity.nodes) {
+                   // get originals of pre-existing child nodes
+                   entity.nodes.forEach(function (nodeID) {
+                     if (nodeID in base.graph.entities) {
+                       baseEntities[nodeID] = base.graph.entities[nodeID];
+                     }

                    });
                    });

-               },
+                 } // get originals of parent entities too

 
 
 
 

-               fromJSON: function(json, loadChildNodes) {
-                   var h = JSON.parse(json);
-                   var loadComplete = true;
+                 var baseParents = base.graph._parentWays[id];

 
 

-                   osmEntity.id.next = h.nextIDs;
-                   _index = h.index;
+                 if (baseParents) {
+                   baseParents.forEach(function (parentID) {
+                     if (parentID in base.graph.entities) {
+                       baseEntities[parentID] = base.graph.entities[parentID];
+                     }
+                   });
+                 }
+               });
+               var x = {};
+               if (modified.length) x.modified = modified;
+               if (deleted.length) x.deleted = deleted;
+               if (i.imageryUsed) x.imageryUsed = i.imageryUsed;
+               if (i.photoOverlaysUsed) x.photoOverlaysUsed = i.photoOverlaysUsed;
+               if (i.annotation) x.annotation = i.annotation;
+               if (i.transform) x.transform = i.transform;
+               if (i.selectedIDs) x.selectedIDs = i.selectedIDs;
+               return x;
+             });

 
 

-                   if (h.version === 2 || h.version === 3) {
-                       var allEntities = {};
+             return JSON.stringify({
+               version: 3,
+               entities: Object.values(allEntities),
+               baseEntities: Object.values(baseEntities),
+               stack: s,
+               nextIDs: osmEntity.id.next,
+               index: _index,
+               // note the time the changes were saved
+               timestamp: new Date().getTime()
+             });
+           },
+           fromJSON: function fromJSON(json, loadChildNodes) {
+             var h = JSON.parse(json);
+             var loadComplete = true;
+             osmEntity.id.next = h.nextIDs;
+             _index = h.index;

 
 

-                       h.entities.forEach(function(entity) {
-                           allEntities[osmEntity.key(entity)] = osmEntity(entity);
-                       });
+             if (h.version === 2 || h.version === 3) {
+               var allEntities = {};
+               h.entities.forEach(function (entity) {
+                 allEntities[osmEntity.key(entity)] = osmEntity(entity);
+               });

 
 

-                       if (h.version === 3) {
-                           // This merges originals for changed entities into the base of
-                           // the _stack even if the current _stack doesn't have them (for
-                           // example when iD has been restarted in a different region)
-                           var baseEntities = h.baseEntities.map(function(d) { return osmEntity(d); });
-                           var stack = _stack.map(function(state) { return state.graph; });
-                           _stack[0].graph.rebase(baseEntities, stack, true);
-                           _tree.rebase(baseEntities, true);
-
-                           // When we restore a modified way, we also need to fetch any missing
-                           // childnodes that would normally have been downloaded with it.. #2142
-                           if (loadChildNodes) {
-                               var osm = context.connection();
-                               var baseWays = baseEntities
-                                   .filter(function(e) { return e.type === 'way'; });
-                               var nodeIDs = baseWays
-                                   .reduce(function(acc, way) { return utilArrayUnion(acc, way.nodes); }, []);
-                               var missing = nodeIDs
-                                   .filter(function(n) { return !_stack[0].graph.hasEntity(n); });
-
-                               if (missing.length && osm) {
-                                   loadComplete = false;
-                                   context.map().redrawEnable(false);
-
-                                   var loading = uiLoading(context).blocking(true);
-                                   context.container().call(loading);
-
-                                   var childNodesLoaded = function(err, result) {
-                                       if (!err) {
-                                           var visibleGroups = utilArrayGroupBy(result.data, 'visible');
-                                           var visibles = visibleGroups.true || [];      // alive nodes
-                                           var invisibles = visibleGroups.false || [];   // deleted nodes
-
-                                           if (visibles.length) {
-                                               var visibleIDs = visibles.map(function(entity) { return entity.id; });
-                                               var stack = _stack.map(function(state) { return state.graph; });
-                                               missing = utilArrayDifference(missing, visibleIDs);
-                                               _stack[0].graph.rebase(visibles, stack, true);
-                                               _tree.rebase(visibles, true);
-                                           }
-
-                                           // fetch older versions of nodes that were deleted..
-                                           invisibles.forEach(function(entity) {
-                                               osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
-                                           });
-                                       }
-
-                                       if (err || !missing.length) {
-                                           loading.close();
-                                           context.map().redrawEnable(true);
-                                           dispatch$1.call('change');
-                                           dispatch$1.call('restore', this);
-                                       }
-                                   };
-
-                                   osm.loadMultiple(missing, childNodesLoaded);
-                               }
-                           }
-                       }
+               if (h.version === 3) {
+                 // This merges originals for changed entities into the base of
+                 // the _stack even if the current _stack doesn't have them (for
+                 // example when iD has been restarted in a different region)
+                 var baseEntities = h.baseEntities.map(function (d) {
+                   return osmEntity(d);
+                 });

 
 

-                       _stack = h.stack.map(function(d) {
-                           var entities = {}, entity;
+                 var stack = _stack.map(function (state) {
+                   return state.graph;
+                 });

 
 

-                           if (d.modified) {
-                               d.modified.forEach(function(key) {
-                                   entity = allEntities[key];
-                                   entities[entity.id] = entity;
-                               });
-                           }
+                 _stack[0].graph.rebase(baseEntities, stack, true);

 
 

-                           if (d.deleted) {
-                               d.deleted.forEach(function(id) {
-                                   entities[id] = undefined;
-                               });
-                           }
+                 _tree.rebase(baseEntities, true); // When we restore a modified way, we also need to fetch any missing
+                 // childnodes that would normally have been downloaded with it.. #2142

 
 

-                           return {
-                               graph: coreGraph(_stack[0].graph).load(entities),
-                               annotation: d.annotation,
-                               imageryUsed: d.imageryUsed,
-                               photoOverlaysUsed: d.photoOverlaysUsed,
-                               transform: d.transform,
-                               selectedIDs: d.selectedIDs
-                           };
-                       });

 
 

-                   } else { // original version
-                       _stack = h.stack.map(function(d) {
-                           var entities = {};
+                 if (loadChildNodes) {
+                   var osm = context.connection();
+                   var baseWays = baseEntities.filter(function (e) {
+                     return e.type === 'way';
+                   });
+                   var nodeIDs = baseWays.reduce(function (acc, way) {
+                     return utilArrayUnion(acc, way.nodes);
+                   }, []);
+                   var missing = nodeIDs.filter(function (n) {
+                     return !_stack[0].graph.hasEntity(n);
+                   });

 
 

-                           for (var i in d.entities) {
-                               var entity = d.entities[i];
-                               entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
-                           }
+                   if (missing.length && osm) {
+                     loadComplete = false;
+                     context.map().redrawEnable(false);
+                     var loading = uiLoading(context).blocking(true);
+                     context.container().call(loading);

 
 

-                           d.graph = coreGraph(_stack[0].graph).load(entities);
-                           return d;
-                       });
-                   }
+                     var childNodesLoaded = function childNodesLoaded(err, result) {
+                       if (!err) {
+                         var visibleGroups = utilArrayGroupBy(result.data, 'visible');
+                         var visibles = visibleGroups["true"] || []; // alive nodes

 
 

-                   var transform = _stack[_index].transform;
-                   if (transform) {
-                       context.map().transformEase(transform, 0);   // 0 = immediate, no easing
-                   }
+                         var invisibles = visibleGroups["false"] || []; // deleted nodes

 
 

-                   if (loadComplete) {
-                       dispatch$1.call('change');
-                       dispatch$1.call('restore', this);
-                   }
+                         if (visibles.length) {
+                           var visibleIDs = visibles.map(function (entity) {
+                             return entity.id;
+                           });

 
 

-                   return history;
-               },
+                           var stack = _stack.map(function (state) {
+                             return state.graph;
+                           });

 
 

+                           missing = utilArrayDifference(missing, visibleIDs);

 
 

-               lock: function() {
-                   return lock.lock();
-               },
+                           _stack[0].graph.rebase(visibles, stack, true);

 
 

+                           _tree.rebase(visibles, true);
+                         } // fetch older versions of nodes that were deleted..

 
 

-               unlock: function() {
-                   lock.unlock();
-               },

 
 

+                         invisibles.forEach(function (entity) {
+                           osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
+                         });
+                       }

 
 

-               save: function() {
-                   if (lock.locked() &&
-                       // don't overwrite existing, unresolved changes
-                       !_hasUnresolvedRestorableChanges) {
+                       if (err || !missing.length) {
+                         loading.close();
+                         context.map().redrawEnable(true);
+                         dispatch.call('change');
+                         dispatch.call('restore', this);
+                       }
+                     };

 
 

-                       corePreferences(getKey('saved_history'), history.toJSON() || null);
+                     osm.loadMultiple(missing, childNodesLoaded);

                    }
                    }

-                   return history;
-               },
-
+                 }
+               }

 
 

-               // delete the history version saved in localStorage
-               clearSaved: function() {
-                   context.debouncedSave.cancel();
-                   if (lock.locked()) {
-                       _hasUnresolvedRestorableChanges = false;
-                       corePreferences(getKey('saved_history'), null);
+               _stack = h.stack.map(function (d) {
+                 var entities = {},
+                     entity;

 
 

-                       // clear the changeset metadata associated with the saved history
-                       corePreferences('comment', null);
-                       corePreferences('hashtags', null);
-                       corePreferences('source', null);
-                   }
-                   return history;
-               },
+                 if (d.modified) {
+                   d.modified.forEach(function (key) {
+                     entity = allEntities[key];
+                     entities[entity.id] = entity;
+                   });
+                 }

 
 

+                 if (d.deleted) {
+                   d.deleted.forEach(function (id) {
+                     entities[id] = undefined;
+                   });
+                 }

 
 

-               savedHistoryJSON: function() {
-                   return corePreferences(getKey('saved_history'));
-               },
+                 return {
+                   graph: coreGraph(_stack[0].graph).load(entities),
+                   annotation: d.annotation,
+                   imageryUsed: d.imageryUsed,
+                   photoOverlaysUsed: d.photoOverlaysUsed,
+                   transform: d.transform,
+                   selectedIDs: d.selectedIDs
+                 };
+               });
+             } else {
+               // original version
+               _stack = h.stack.map(function (d) {
+                 var entities = {};

 
 

+                 for (var i in d.entities) {
+                   var entity = d.entities[i];
+                   entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
+                 }

 
 

-               hasRestorableChanges: function() {
-                   return _hasUnresolvedRestorableChanges;
-               },
+                 d.graph = coreGraph(_stack[0].graph).load(entities);
+                 return d;
+               });
+             }

 
 

+             var transform = _stack[_index].transform;

 
 

-               // load history from a version stored in localStorage
-               restore: function() {
-                   if (lock.locked()) {
-                       _hasUnresolvedRestorableChanges = false;
-                       var json = this.savedHistoryJSON();
-                       if (json) { history.fromJSON(json, true); }
-                   }
-               },
+             if (transform) {
+               context.map().transformEase(transform, 0); // 0 = immediate, no easing
+             }

 
 

+             if (loadComplete) {
+               dispatch.call('change');
+               dispatch.call('restore', this);
+             }

 
 

-               _getKey: getKey
+             return history;
+           },
+           lock: function lock() {
+             return _lock.lock();
+           },
+           unlock: function unlock() {
+             _lock.unlock();
+           },
+           save: function save() {
+             if (_lock.locked() && // don't overwrite existing, unresolved changes
+             !_hasUnresolvedRestorableChanges) {
+               var success = corePreferences(getKey('saved_history'), history.toJSON() || null);
+               if (!success) dispatch.call('storage_error');
+             }

 
 

-           };
+             return history;
+           },
+           // delete the history version saved in localStorage
+           clearSaved: function clearSaved() {
+             context.debouncedSave.cancel();

 
 

+             if (_lock.locked()) {
+               _hasUnresolvedRestorableChanges = false;
+               corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history

 
 

-           history.reset();
+               corePreferences('comment', null);
+               corePreferences('hashtags', null);
+               corePreferences('source', null);
+             }

 
 

-           return utilRebind(history, dispatch$1, 'on');
+             return history;
+           },
+           savedHistoryJSON: function savedHistoryJSON() {
+             return corePreferences(getKey('saved_history'));
+           },
+           hasRestorableChanges: function hasRestorableChanges() {
+             return _hasUnresolvedRestorableChanges;
+           },
+           // load history from a version stored in localStorage
+           restore: function restore() {
+             if (_lock.locked()) {
+               _hasUnresolvedRestorableChanges = false;
+               var json = this.savedHistoryJSON();
+               if (json) history.fromJSON(json, true);
+             }
+           },
+           _getKey: getKey
+         };
+         history.reset();
+         return utilRebind(history, dispatch, 'on');

        }
 
        /**
         * Look for roads that can be connected to other roads with a short extension
         */
        }
 
        /**
         * Look for roads that can be connected to other roads with a short extension
         */

+

        function validationAlmostJunction(context) {
          var type = 'almost_junction';
          var EXTEND_TH_METERS = 5;
        function validationAlmostJunction(context) {
          var type = 'almost_junction';
          var EXTEND_TH_METERS = 5;

-         var WELD_TH_METERS = 0.75;
-         // Comes from considering bounding case of parallel ways
-         var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS;
-         // Comes from considering bounding case of perpendicular ways
+         var WELD_TH_METERS = 0.75; // Comes from considering bounding case of parallel ways
+
+         var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways
+

          var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
 
          function isHighway(entity) {
          var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
 
          function isHighway(entity) {

-           return entity.type === 'way'
-             && osmRoutableHighwayTagValues[entity.tags.highway];
+           return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];

          }
 
          function isTaggedAsNotContinuing(node) {
          }
 
          function isTaggedAsNotContinuing(node) {

-           return node.tags.noexit === 'yes'
-             || node.tags.amenity === 'parking_entrance'
-             || (node.tags.entrance && node.tags.entrance !== 'no');
+           return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';

          }
 
          }
 

-

          var validation = function checkAlmostJunction(entity, graph) {
          var validation = function checkAlmostJunction(entity, graph) {

-           if (!isHighway(entity)) { return []; }
-           if (entity.isDegenerate()) { return []; }
-
+           if (!isHighway(entity)) return [];
+           if (entity.isDegenerate()) return [];

            var tree = context.history().tree();
            var extendableNodeInfos = findConnectableEndNodesByExtension(entity);
            var tree = context.history().tree();
            var extendableNodeInfos = findConnectableEndNodesByExtension(entity);

-

            var issues = [];
            var issues = [];

-

            extendableNodeInfos.forEach(function (extendableNodeInfo) {
              issues.push(new validationIssue({
                type: type,
            extendableNodeInfos.forEach(function (extendableNodeInfo) {
              issues.push(new validationIssue({
                type: type,


@@ -56875,23 +55712,21 @@
                severity: 'warning',
                message: function message(context) {
                  var entity1 = context.hasEntity(this.entityIds[0]);
                severity: 'warning',
                message: function message(context) {
                  var entity1 = context.hasEntity(this.entityIds[0]);

+

                  if (this.entityIds[0] === this.entityIds[2]) {
                  if (this.entityIds[0] === this.entityIds[2]) {

-                   return entity1 ? _t('issues.almost_junction.self.message', {
+                   return entity1 ? _t.html('issues.almost_junction.self.message', {

                      feature: utilDisplayLabel(entity1, context.graph())
                    }) : '';
                  } else {
                    var entity2 = context.hasEntity(this.entityIds[2]);
                      feature: utilDisplayLabel(entity1, context.graph())
                    }) : '';
                  } else {
                    var entity2 = context.hasEntity(this.entityIds[2]);

-                   return (entity1 && entity2) ? _t('issues.almost_junction.message', {
+                   return entity1 && entity2 ? _t.html('issues.almost_junction.message', {

                      feature: utilDisplayLabel(entity1, context.graph()),
                      feature2: utilDisplayLabel(entity2, context.graph())
                    }) : '';
                  }
                },
                reference: showReference,
                      feature: utilDisplayLabel(entity1, context.graph()),
                      feature2: utilDisplayLabel(entity2, context.graph())
                    }) : '';
                  }
                },
                reference: showReference,

-               entityIds: [
-                 entity.id,
-                 extendableNodeInfo.node.id,
-                 extendableNodeInfo.wid ],
+               entityIds: [entity.id, extendableNodeInfo.node.id, extendableNodeInfo.wid],

                loc: extendableNodeInfo.node.loc,
                hash: JSON.stringify(extendableNodeInfo.node.loc),
                data: {
                loc: extendableNodeInfo.node.loc,
                hash: JSON.stringify(extendableNodeInfo.node.loc),
                data: {


@@ -56902,31 +55737,30 @@
                dynamicFixes: makeFixes
              }));
            });
                dynamicFixes: makeFixes
              }));
            });

-

            return issues;
 
            function makeFixes(context) {
              var fixes = [new validationIssueFix({
                icon: 'iD-icon-abutment',
            return issues;
 
            function makeFixes(context) {
              var fixes = [new validationIssueFix({
                icon: 'iD-icon-abutment',

-               title: _t('issues.fix.connect_features.title'),
+               title: _t.html('issues.fix.connect_features.title'),

                onClick: function onClick(context) {
                  var annotation = _t('issues.fix.connect_almost_junction.annotation');
                onClick: function onClick(context) {
                  var annotation = _t('issues.fix.connect_almost_junction.annotation');

-                 var ref = this.issue.entityIds;
-                 var endNodeId = ref[1];
-                 var crossWayId = ref[2];
+
+                 var _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
+                     endNodeId = _this$issue$entityIds[1],
+                     crossWayId = _this$issue$entityIds[2];
+

                  var midNode = context.entity(this.issue.data.midId);
                  var endNode = context.entity(endNodeId);
                  var midNode = context.entity(this.issue.data.midId);
                  var endNode = context.entity(endNodeId);

-                 var crossWay = context.entity(crossWayId);
+                 var crossWay = context.entity(crossWayId); // When endpoints are close, just join if resulting small change in angle (#7201)

 
 

-                 // When endpoints are close, just join if resulting small change in angle (#7201)

                  var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
                  var nearEndNodes = findNearbyEndNodes(endNode, crossWay);

+

                  if (nearEndNodes.length > 0) {
                    var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
                  if (nearEndNodes.length > 0) {
                    var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);

+

                    if (collinear) {
                    if (collinear) {

-                     context.perform(
-                       actionMergeNodes([collinear.id, endNode.id], collinear.loc),
-                       annotation
-                     );
+                     context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);

                      return;
                    }
                  }
                      return;
                    }
                  }


@@ -56934,38 +55768,30 @@
                  var targetEdge = this.issue.data.edge;
                  var crossLoc = this.issue.data.cross_loc;
                  var edgeNodes = [context.entity(targetEdge[0]), context.entity(targetEdge[1])];
                  var targetEdge = this.issue.data.edge;
                  var crossLoc = this.issue.data.cross_loc;
                  var edgeNodes = [context.entity(targetEdge[0]), context.entity(targetEdge[1])];

-                 var closestNodeInfo = geoSphericalClosestNode(edgeNodes, crossLoc);
+                 var closestNodeInfo = geoSphericalClosestNode(edgeNodes, crossLoc); // already a point nearby, just connect to that

 
 

-                 // already a point nearby, just connect to that

                  if (closestNodeInfo.distance < WELD_TH_METERS) {
                  if (closestNodeInfo.distance < WELD_TH_METERS) {

-                   context.perform(
-                     actionMergeNodes([closestNodeInfo.node.id, endNode.id], closestNodeInfo.node.loc),
-                     annotation
-                   );
-                 // else add the end node to the edge way
+                   context.perform(actionMergeNodes([closestNodeInfo.node.id, endNode.id], closestNodeInfo.node.loc), annotation); // else add the end node to the edge way

                  } else {
                  } else {

-                   context.perform(
-                     actionAddMidpoint({loc: crossLoc, edge: targetEdge}, endNode),
-                     annotation
-                   );
+                   context.perform(actionAddMidpoint({
+                     loc: crossLoc,
+                     edge: targetEdge
+                   }, endNode), annotation);

                  }
                }
              })];
                  }
                }
              })];

-

              var node = context.hasEntity(this.entityIds[1]);
              var node = context.hasEntity(this.entityIds[1]);

+

              if (node && !node.hasInterestingTags()) {
                // node has no descriptive tags, suggest noexit fix
                fixes.push(new validationIssueFix({
                  icon: 'maki-barrier',
              if (node && !node.hasInterestingTags()) {
                // node has no descriptive tags, suggest noexit fix
                fixes.push(new validationIssueFix({
                  icon: 'maki-barrier',

-                 title: _t('issues.fix.tag_as_disconnected.title'),
+                 title: _t.html('issues.fix.tag_as_disconnected.title'),

                  onClick: function onClick(context) {
                    var nodeID = this.issue.entityIds[1];
                    var tags = Object.assign({}, context.entity(nodeID).tags);
                    tags.noexit = 'yes';
                  onClick: function onClick(context) {
                    var nodeID = this.issue.entityIds[1];
                    var tags = Object.assign({}, context.entity(nodeID).tags);
                    tags.noexit = 'yes';

-                   context.perform(
-                     actionChangeTags(nodeID, tags),
-                     _t('issues.fix.tag_as_disconnected.annotation')
-                   );
+                   context.perform(actionChangeTags(nodeID, tags), _t('issues.fix.tag_as_disconnected.annotation'));

                  }
                }));
              }
                  }
                }));
              }


@@ -56974,81 +55800,71 @@
            }
 
            function showReference(selection) {
            }
 
            function showReference(selection) {

-             selection.selectAll('.issue-reference')
-               .data([0])
-               .enter()
-               .append('div')
-               .attr('class', 'issue-reference')
-               .text(_t('issues.almost_junction.highway-highway.reference'));
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.almost_junction.highway-highway.reference'));

            }
 
            function isExtendableCandidate(node, way) {
              // can not accurately test vertices on tiles not downloaded from osm - #5938
              var osm = services.osm;
            }
 
            function isExtendableCandidate(node, way) {
              // can not accurately test vertices on tiles not downloaded from osm - #5938
              var osm = services.osm;

+

              if (osm && !osm.isDataLoaded(node.loc)) {
                return false;
              }
              if (osm && !osm.isDataLoaded(node.loc)) {
                return false;
              }

+

              if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
                return false;
              }
 
              if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
                return false;
              }
 

-             var occurences = 0;
+             var occurrences = 0;
+

              for (var index in way.nodes) {
                if (way.nodes[index] === node.id) {
              for (var index in way.nodes) {
                if (way.nodes[index] === node.id) {

-                 occurences += 1;
-                 if (occurences > 1) {
+                 occurrences += 1;
+
+                 if (occurrences > 1) {

                    return false;
                  }
                }
              }
                    return false;
                  }
                }
              }

+

              return true;
            }
 
            function findConnectableEndNodesByExtension(way) {
              var results = [];
              return true;
            }
 
            function findConnectableEndNodesByExtension(way) {
              var results = [];

-             if (way.isClosed()) { return results; }
-
+             if (way.isClosed()) return results;

              var testNodes;
              var indices = [0, way.nodes.length - 1];
              indices.forEach(function (nodeIndex) {
                var nodeID = way.nodes[nodeIndex];
                var node = graph.entity(nodeID);
              var testNodes;
              var indices = [0, way.nodes.length - 1];
              indices.forEach(function (nodeIndex) {
                var nodeID = way.nodes[nodeIndex];
                var node = graph.entity(nodeID);

-
-               if (!isExtendableCandidate(node, way)) { return; }
-
+               if (!isExtendableCandidate(node, way)) return;

                var connectionInfo = canConnectByExtend(way, nodeIndex);
                var connectionInfo = canConnectByExtend(way, nodeIndex);

-               if (!connectionInfo) { return; }
-
-               testNodes = graph.childNodes(way).slice();   // shallow copy
-               testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc);
+               if (!connectionInfo) return;
+               testNodes = graph.childNodes(way).slice(); // shallow copy

 
 

-               // don't flag issue if connecting the ways would cause self-intersection
-               if (geoHasSelfIntersections(testNodes, nodeID)) { return; }
+               testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection

 
 

+               if (geoHasSelfIntersections(testNodes, nodeID)) return;

                results.push(connectionInfo);
              });
                results.push(connectionInfo);
              });

-

              return results;
            }
 
            function findNearbyEndNodes(node, way) {
              return results;
            }
 
            function findNearbyEndNodes(node, way) {

-             return [
-               way.nodes[0],
-               way.nodes[way.nodes.length - 1]
-             ].map(function (d) { return graph.entity(d); })
-             .filter(function (d) {
+             return [way.nodes[0], way.nodes[way.nodes.length - 1]].map(function (d) {
+               return graph.entity(d);
+             }).filter(function (d) {

                // Node cannot be near to itself, but other endnode of same way could be
                // Node cannot be near to itself, but other endnode of same way could be

-               return d.id !== node.id
-                 && geoSphericalDistance(node.loc, d.loc) <= CLOSE_NODE_TH;
+               return d.id !== node.id && geoSphericalDistance(node.loc, d.loc) <= CLOSE_NODE_TH;

              });
            }
 
            function findSmallJoinAngle(midNode, tipNode, endNodes) {
              // Both nodes could be close, so want to join whichever is closest to collinear
              var joinTo;
              });
            }
 
            function findSmallJoinAngle(midNode, tipNode, endNodes) {
              // Both nodes could be close, so want to join whichever is closest to collinear
              var joinTo;

-             var minAngle = Infinity;
+             var minAngle = Infinity; // Checks midNode -> tipNode -> endNode for collinearity

 
 

-             // Checks midNode -> tipNode -> endNode for collinearity

              endNodes.forEach(function (endNode) {
                var a1 = geoAngle(midNode, tipNode, context.projection) + Math.PI;
                var a2 = geoAngle(midNode, endNode, context.projection) + Math.PI;
              endNodes.forEach(function (endNode) {
                var a1 = geoAngle(midNode, tipNode, context.projection) + Math.PI;
                var a2 = geoAngle(midNode, endNode, context.projection) + Math.PI;


@@ -57059,11 +55875,10 @@
                  minAngle = diff;
                }
              });
                  minAngle = diff;
                }
              });

-

              /* Threshold set by considering right angle triangle
              based on node joining threshold and extension distance */
              /* Threshold set by considering right angle triangle
              based on node joining threshold and extension distance */

-             if (minAngle <= SIG_ANGLE_TH) { return joinTo; }

 
 

+             if (minAngle <= SIG_ANGLE_TH) return joinTo;

              return null;
            }
 
              return null;
            }
 


@@ -57072,66 +55887,52 @@
            }
 
            function canConnectWays(way, way2) {
            }
 
            function canConnectWays(way, way2) {

-

              // allow self-connections
              // allow self-connections

-             if (way.id === way2.id) { return true; }
+             if (way.id === way2.id) return true; // if one is bridge or tunnel, both must be bridge or tunnel

 
 

-             // if one is bridge or tunnel, both must be bridge or tunnel
-             if ((hasTag(way.tags, 'bridge') || hasTag(way2.tags, 'bridge')) &&
-               !(hasTag(way.tags, 'bridge') && hasTag(way2.tags, 'bridge'))) { return false; }
-             if ((hasTag(way.tags, 'tunnel') || hasTag(way2.tags, 'tunnel')) &&
-               !(hasTag(way.tags, 'tunnel') && hasTag(way2.tags, 'tunnel'))) { return false; }
+             if ((hasTag(way.tags, 'bridge') || hasTag(way2.tags, 'bridge')) && !(hasTag(way.tags, 'bridge') && hasTag(way2.tags, 'bridge'))) return false;
+             if ((hasTag(way.tags, 'tunnel') || hasTag(way2.tags, 'tunnel')) && !(hasTag(way.tags, 'tunnel') && hasTag(way2.tags, 'tunnel'))) return false; // must have equivalent layers and levels

 
 

-             // must have equivalent layers and levels

              var layer1 = way.tags.layer || '0',
              var layer1 = way.tags.layer || '0',

-               layer2 = way2.tags.layer || '0';
-             if (layer1 !== layer2) { return false; }
-
+                 layer2 = way2.tags.layer || '0';
+             if (layer1 !== layer2) return false;

              var level1 = way.tags.level || '0',
              var level1 = way.tags.level || '0',

-               level2 = way2.tags.level || '0';
-             if (level1 !== level2) { return false; }
-
+                 level2 = way2.tags.level || '0';
+             if (level1 !== level2) return false;

              return true;
            }
 
            function canConnectByExtend(way, endNodeIdx) {
              return true;
            }
 
            function canConnectByExtend(way, endNodeIdx) {

-             var tipNid = way.nodes[endNodeIdx];  // the 'tip' node for extension point
-             var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2];  // the other node of the edge
+             var tipNid = way.nodes[endNodeIdx]; // the 'tip' node for extension point
+
+             var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2]; // the other node of the edge
+

              var tipNode = graph.entity(tipNid);
              var midNode = graph.entity(midNid);
              var lon = tipNode.loc[0];
              var lat = tipNode.loc[1];
              var lon_range = geoMetersToLon(EXTEND_TH_METERS, lat) / 2;
              var lat_range = geoMetersToLat(EXTEND_TH_METERS) / 2;
              var tipNode = graph.entity(tipNid);
              var midNode = graph.entity(midNid);
              var lon = tipNode.loc[0];
              var lat = tipNode.loc[1];
              var lon_range = geoMetersToLon(EXTEND_TH_METERS, lat) / 2;
              var lat_range = geoMetersToLat(EXTEND_TH_METERS) / 2;

-             var queryExtent = geoExtent([
-               [lon - lon_range, lat - lat_range],
-               [lon + lon_range, lat + lat_range]
-             ]);
+             var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]); // first, extend the edge of [midNode -> tipNode] by EXTEND_TH_METERS and find the "extended tip" location

 
 

-             // first, extend the edge of [midNode -> tipNode] by EXTEND_TH_METERS and find the "extended tip" location

              var edgeLen = geoSphericalDistance(midNode.loc, tipNode.loc);
              var t = EXTEND_TH_METERS / edgeLen + 1.0;
              var edgeLen = geoSphericalDistance(midNode.loc, tipNode.loc);
              var t = EXTEND_TH_METERS / edgeLen + 1.0;

-             var extTipLoc = geoVecInterp(midNode.loc, tipNode.loc, t);
+             var extTipLoc = geoVecInterp(midNode.loc, tipNode.loc, t); // then, check if the extension part [tipNode.loc -> extTipLoc] intersects any other ways

 
 

-             // then, check if the extension part [tipNode.loc -> extTipLoc] intersects any other ways

              var segmentInfos = tree.waySegments(queryExtent, graph);
              var segmentInfos = tree.waySegments(queryExtent, graph);

+

              for (var i = 0; i < segmentInfos.length; i++) {
                var segmentInfo = segmentInfos[i];
              for (var i = 0; i < segmentInfos.length; i++) {
                var segmentInfo = segmentInfos[i];

-

                var way2 = graph.entity(segmentInfo.wayId);
                var way2 = graph.entity(segmentInfo.wayId);

-
-               if (!isHighway(way2)) { continue; }
-
-               if (!canConnectWays(way, way2)) { continue; }
-
+               if (!isHighway(way2)) continue;
+               if (!canConnectWays(way, way2)) continue;

                var nAid = segmentInfo.nodes[0],
                var nAid = segmentInfo.nodes[0],

-                 nBid = segmentInfo.nodes[1];
-
-               if (nAid === tipNid || nBid === tipNid) { continue; }
-
+                   nBid = segmentInfo.nodes[1];
+               if (nAid === tipNid || nBid === tipNid) continue;

                var nA = graph.entity(nAid),
                var nA = graph.entity(nAid),

-                 nB = graph.entity(nBid);
+                   nB = graph.entity(nBid);

                var crossLoc = geoLineIntersection([tipNode.loc, extTipLoc], [nA.loc, nB.loc]);
                var crossLoc = geoLineIntersection([tipNode.loc, extTipLoc], [nA.loc, nB.loc]);

+

                if (crossLoc) {
                  return {
                    mid: midNode,
                if (crossLoc) {
                  return {
                    mid: midNode,


@@ -57142,3619 +55943,2649 @@
                  };
                }
              }
                  };
                }
              }

+

              return null;
            }
          };
 
          validation.type = type;
              return null;
            }
          };
 
          validation.type = type;

-

          return validation;
        }
 
        function validationCloseNodes(context) {
          return validation;
        }
 
        function validationCloseNodes(context) {

-           var type = 'close_nodes';
-
-           var pointThresholdMeters = 0.2;
-
-           var validation = function(entity, graph) {
-               if (entity.type === 'node') {
-                   return getIssuesForNode(entity);
-               } else if (entity.type === 'way') {
-                   return getIssuesForWay(entity);
-               }
-               return [];
-
-               function getIssuesForNode(node) {
-                   var parentWays = graph.parentWays(node);
-                   if (parentWays.length) {
-                       return getIssuesForVertex(node, parentWays);
-                   } else {
-                       return getIssuesForDetachedPoint(node);
-                   }
-               }
-
-               function wayTypeFor(way) {
-
-                   if (way.tags.boundary && way.tags.boundary !== 'no') { return 'boundary'; }
-                   if (way.tags.indoor && way.tags.indoor !== 'no') { return 'indoor'; }
-                   if ((way.tags.building && way.tags.building !== 'no') ||
-                       (way.tags['building:part'] && way.tags['building:part'] !== 'no')) { return 'building'; }
-                   if (osmPathHighwayTagValues[way.tags.highway]) { return 'path'; }
-
-                   var parentRelations = graph.parentRelations(way);
-                   for (var i in parentRelations) {
-                       var relation = parentRelations[i];
-
-                       if (relation.tags.type === 'boundary') { return 'boundary'; }
-
-                       if (relation.isMultipolygon()) {
-                           if (relation.tags.indoor && relation.tags.indoor !== 'no') { return 'indoor'; }
-                           if ((relation.tags.building && relation.tags.building !== 'no') ||
-                               (relation.tags['building:part'] && relation.tags['building:part'] !== 'no')) { return 'building'; }
-                       }
-                   }
-
-                   return 'other';
-               }
-
-               function shouldCheckWay(way) {
-
-                   // don't flag issues where merging would create degenerate ways
-                   if (way.nodes.length <= 2 ||
-                       (way.isClosed() && way.nodes.length <= 4)) { return false; }
-
-                   var bbox = way.extent(graph).bbox();
-                   var hypotenuseMeters = geoSphericalDistance([bbox.minX, bbox.minY], [bbox.maxX, bbox.maxY]);
-                   // don't flag close nodes in very small ways
-                   if (hypotenuseMeters < 1.5) { return false; }
-
-                   return true;
-               }
-
-               function getIssuesForWay(way) {
-                   if (!shouldCheckWay(way)) { return []; }
-
-                   var issues = [],
-                       nodes = graph.childNodes(way);
-                   for (var i = 0; i < nodes.length - 1; i++) {
-                       var node1 = nodes[i];
-                       var node2 = nodes[i+1];
-
-                       var issue = getWayIssueIfAny(node1, node2, way);
-                       if (issue) { issues.push(issue); }
-                   }
-                   return issues;
-               }
-
-               function getIssuesForVertex(node, parentWays) {
-                   var issues = [];
-
-                   function checkForCloseness(node1, node2, way) {
-                       var issue = getWayIssueIfAny(node1, node2, way);
-                       if (issue) { issues.push(issue); }
-                   }
-
-                   for (var i = 0; i < parentWays.length; i++) {
-                       var parentWay = parentWays[i];
-
-                       if (!shouldCheckWay(parentWay)) { continue; }
-
-                       var lastIndex = parentWay.nodes.length - 1;
-                       for (var j = 0; j < parentWay.nodes.length; j++) {
-                           if (j !== 0) {
-                               if (parentWay.nodes[j-1] === node.id) {
-                                   checkForCloseness(node, graph.entity(parentWay.nodes[j]), parentWay);
-                               }
-                           }
-                           if (j !== lastIndex) {
-                               if (parentWay.nodes[j+1] === node.id) {
-                                   checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
-                               }
-                           }
-                       }
-                   }
-                   return issues;
-               }
-
-               function thresholdMetersForWay(way) {
-                   if (!shouldCheckWay(way)) { return 0; }
-
-                   var wayType = wayTypeFor(way);
-
-                   // don't flag boundaries since they might be highly detailed and can't be easily verified
-                   if (wayType === 'boundary') { return 0; }
-                   // expect some features to be mapped with higher levels of detail
-                   if (wayType === 'indoor') { return 0.01; }
-                   if (wayType === 'building') { return 0.05; }
-                   if (wayType === 'path') { return 0.1; }
-                   return 0.2;
-               }
-
-               function getIssuesForDetachedPoint(node) {
-
-                   var issues = [];
-
-                   var lon = node.loc[0];
-                   var lat = node.loc[1];
-                   var lon_range = geoMetersToLon(pointThresholdMeters, lat) / 2;
-                   var lat_range = geoMetersToLat(pointThresholdMeters) / 2;
-                   var queryExtent = geoExtent([
-                       [lon - lon_range, lat - lat_range],
-                       [lon + lon_range, lat + lat_range]
-                   ]);
-
-                   var intersected = context.history().tree().intersects(queryExtent, graph);
-                   for (var j = 0; j < intersected.length; j++) {
-                       var nearby = intersected[j];
-
-                       if (nearby.id === node.id) { continue; }
-                       if (nearby.type !== 'node' || nearby.geometry(graph) !== 'point') { continue; }
-
-                       if (nearby.loc === node.loc ||
-                           geoSphericalDistance(node.loc, nearby.loc) < pointThresholdMeters) {
-
-                           // allow very close points if tags indicate the z-axis might vary
-                           var zAxisKeys = { layer: true, level: true, 'addr:housenumber': true, 'addr:unit': true };
-                           var zAxisDifferentiates = false;
-                           for (var key in zAxisKeys) {
-                               var nodeValue = node.tags[key] || '0';
-                               var nearbyValue = nearby.tags[key] || '0';
-                               if (nodeValue !== nearbyValue) {
-                                   zAxisDifferentiates = true;
-                                   break;
-                               }
-                           }
-                           if (zAxisDifferentiates) { continue; }
-
-                           issues.push(new validationIssue({
-                               type: type,
-                               subtype: 'detached',
-                               severity: 'warning',
-                               message: function(context) {
-                                   var entity = context.hasEntity(this.entityIds[0]),
-                                       entity2 = context.hasEntity(this.entityIds[1]);
-                                   return (entity && entity2) ? _t('issues.close_nodes.detached.message', {
-                                       feature: utilDisplayLabel(entity, context.graph()),
-                                       feature2: utilDisplayLabel(entity2, context.graph())
-                                   }) : '';
-                               },
-                               reference: showReference,
-                               entityIds: [node.id, nearby.id],
-                               dynamicFixes: function() {
-                                   return [
-                                       new validationIssueFix({
-                                           icon: 'iD-operation-disconnect',
-                                           title: _t('issues.fix.move_points_apart.title')
-                                       }),
-                                       new validationIssueFix({
-                                           icon: 'iD-icon-layers',
-                                           title: _t('issues.fix.use_different_layers_or_levels.title')
-                                       })
-                                   ];
-                               }
-                           }));
-                       }
-                   }
-
-                   return issues;
-
-                   function showReference(selection) {
-                       var referenceText = _t('issues.close_nodes.detached.reference');
-                       selection.selectAll('.issue-reference')
-                           .data([0])
-                           .enter()
-                           .append('div')
-                           .attr('class', 'issue-reference')
-                           .text(referenceText);
-                   }
-               }
-
-               function getWayIssueIfAny(node1, node2, way) {
-                   if (node1.id === node2.id ||
-                       (node1.hasInterestingTags() && node2.hasInterestingTags())) {
-                       return null;
-                   }
-
-                   if (node1.loc !== node2.loc) {
-                       var parentWays1 = graph.parentWays(node1);
-                       var parentWays2 = new Set(graph.parentWays(node2));
-
-                       var sharedWays = parentWays1.filter(function(parentWay) {
-                           return parentWays2.has(parentWay);
-                       });
-
-                       var thresholds = sharedWays.map(function(parentWay) {
-                           return thresholdMetersForWay(parentWay);
-                       });
-
-                       var threshold = Math.min.apply(Math, thresholds);
-                       var distance = geoSphericalDistance(node1.loc, node2.loc);
-                       if (distance > threshold) { return null; }
-                   }
-
-                   return new validationIssue({
-                       type: type,
-                       subtype: 'vertices',
-                       severity: 'warning',
-                       message: function(context) {
-                           var entity = context.hasEntity(this.entityIds[0]);
-                           return entity ? _t('issues.close_nodes.message', { way: utilDisplayLabel(entity, context.graph()) }) : '';
-                       },
-                       reference: showReference,
-                       entityIds: [way.id, node1.id, node2.id],
-                       loc: node1.loc,
-                       dynamicFixes: function() {
-                           return [
-                               new validationIssueFix({
-                                   icon: 'iD-icon-plus',
-                                   title: _t('issues.fix.merge_points.title'),
-                                   onClick: function(context) {
-                                       var entityIds = this.issue.entityIds;
-                                       var action = actionMergeNodes([entityIds[1], entityIds[2]]);
-                                       context.perform(action, _t('issues.fix.merge_close_vertices.annotation'));
-                                   }
-                               }),
-                               new validationIssueFix({
-                                   icon: 'iD-operation-disconnect',
-                                   title: _t('issues.fix.move_points_apart.title')
-                               })
-                           ];
-                       }
-                   });
-
-                   function showReference(selection) {
-                       var referenceText = _t('issues.close_nodes.reference');
-                       selection.selectAll('.issue-reference')
-                           .data([0])
-                           .enter()
-                           .append('div')
-                           .attr('class', 'issue-reference')
-                           .text(referenceText);
-                   }
-               }
-
-           };
+         var type = 'close_nodes';
+         var pointThresholdMeters = 0.2;

 
 

-
-           validation.type = type;
-
-           return validation;
-       }
-
-       function validationCrossingWays(context) {
-           var type = 'crossing_ways';
-
-           // returns the way or its parent relation, whichever has a useful feature type
-           function getFeatureWithFeatureTypeTagsForWay(way, graph) {
-               if (getFeatureType(way, graph) === null) {
-                   // if the way doesn't match a feature type, check its parent relations
-                   var parentRels = graph.parentRelations(way);
-                   for (var i = 0; i < parentRels.length; i++) {
-                       var rel = parentRels[i];
-                       if (getFeatureType(rel, graph) !== null) {
-                           return rel;
-                       }
-                   }
-               }
-               return way;
-           }
-
-
-           function hasTag(tags, key) {
-               return tags[key] !== undefined && tags[key] !== 'no';
-           }
-
-           function taggedAsIndoor(tags) {
-               return hasTag(tags, 'indoor') ||
-                   hasTag(tags, 'level') ||
-                   tags.highway === 'corridor';
-           }
-
-           function allowsBridge(featureType) {
-               return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
-           }
-           function allowsTunnel(featureType) {
-               return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
-           }
-
-
-           function getFeatureTypeForCrossingCheck(way, graph) {
-               var feature = getFeatureWithFeatureTypeTagsForWay(way, graph);
-               return getFeatureType(feature, graph);
+         var validation = function validation(entity, graph) {
+           if (entity.type === 'node') {
+             return getIssuesForNode(entity);
+           } else if (entity.type === 'way') {
+             return getIssuesForWay(entity);

            }
 
            }
 

-           // discard
-           var ignoredBuildings = {
-               demolished: true, dismantled: true, proposed: true, razed: true
-           };
-
-
-           function getFeatureType(entity, graph) {
+           return [];

 
 

-               var geometry = entity.geometry(graph);
-               if (geometry !== 'line' && geometry !== 'area') { return null; }
+           function getIssuesForNode(node) {
+             var parentWays = graph.parentWays(node);

 
 

-               var tags = entity.tags;
-
-               if (hasTag(tags, 'building') && !ignoredBuildings[tags.building]) { return 'building'; }
-               if (hasTag(tags, 'highway') && osmRoutableHighwayTagValues[tags.highway]) { return 'highway'; }
-
-               // don't check railway or waterway areas
-               if (geometry !== 'line') { return null; }
-
-               if (hasTag(tags, 'railway') && osmRailwayTrackTagValues[tags.railway]) { return 'railway'; }
-               if (hasTag(tags, 'waterway') && osmFlowingWaterwayTagValues[tags.waterway]) { return 'waterway'; }
-
-               return null;
+             if (parentWays.length) {
+               return getIssuesForVertex(node, parentWays);
+             } else {
+               return getIssuesForDetachedPoint(node);
+             }

            }
 
            }
 

+           function wayTypeFor(way) {
+             if (way.tags.boundary && way.tags.boundary !== 'no') return 'boundary';
+             if (way.tags.indoor && way.tags.indoor !== 'no') return 'indoor';
+             if (way.tags.building && way.tags.building !== 'no' || way.tags['building:part'] && way.tags['building:part'] !== 'no') return 'building';
+             if (osmPathHighwayTagValues[way.tags.highway]) return 'path';
+             var parentRelations = graph.parentRelations(way);

 
 

-           function isLegitCrossing(way1, featureType1, way2, featureType2) {
-               var tags1 = way1.tags;
-               var tags2 = way2.tags;
-
-               // assume 0 by default
-               var level1 = tags1.level || '0';
-               var level2 = tags2.level || '0';
+             for (var i in parentRelations) {
+               var relation = parentRelations[i];
+               if (relation.tags.type === 'boundary') return 'boundary';

 
 

-               if (taggedAsIndoor(tags1) && taggedAsIndoor(tags2) && level1 !== level2) {
-                   // assume features don't interact if they're indoor on different levels
-                   return true;
-               }
-
-               // assume 0 by default; don't use way.layer() since we account for structures here
-               var layer1 = tags1.layer || '0';
-               var layer2 = tags2.layer || '0';
-
-               if (allowsBridge(featureType1) && allowsBridge(featureType2)) {
-                   if (hasTag(tags1, 'bridge') && !hasTag(tags2, 'bridge')) { return true; }
-                   if (!hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge')) { return true; }
-                   // crossing bridges must use different layers
-                   if (hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge') && layer1 !== layer2) { return true; }
-               } else if (allowsBridge(featureType1) && hasTag(tags1, 'bridge')) { return true; }
-               else if (allowsBridge(featureType2) && hasTag(tags2, 'bridge')) { return true; }
-
-               if (allowsTunnel(featureType1) && allowsTunnel(featureType2)) {
-                   if (hasTag(tags1, 'tunnel') && !hasTag(tags2, 'tunnel')) { return true; }
-                   if (!hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel')) { return true; }
-                   // crossing tunnels must use different layers
-                   if (hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel') && layer1 !== layer2) { return true; }
-               } else if (allowsTunnel(featureType1) && hasTag(tags1, 'tunnel')) { return true; }
-               else if (allowsTunnel(featureType2) && hasTag(tags2, 'tunnel')) { return true; }
-
-               // don't flag crossing waterways and pier/highways
-               if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') { return true; }
-               if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') { return true; }
-
-               if (featureType1 === 'building' || featureType2 === 'building') {
-                   // for building crossings, different layers are enough
-                   if (layer1 !== layer2) { return true; }
+               if (relation.isMultipolygon()) {
+                 if (relation.tags.indoor && relation.tags.indoor !== 'no') return 'indoor';
+                 if (relation.tags.building && relation.tags.building !== 'no' || relation.tags['building:part'] && relation.tags['building:part'] !== 'no') return 'building';

                }
                }

-               return false;
-           }
-
-
-           // highway values for which we shouldn't recommend connecting to waterways
-           var highwaysDisallowingFords = {
-               motorway: true, motorway_link: true, trunk: true, trunk_link: true,
-               primary: true, primary_link: true, secondary: true, secondary_link: true
-           };
-           var nonCrossingHighways = { track: true };
-
-           function tagsForConnectionNodeIfAllowed(entity1, entity2, graph) {
-               var featureType1 = getFeatureType(entity1, graph);
-               var featureType2 = getFeatureType(entity2, graph);
-
-               var geometry1 = entity1.geometry(graph);
-               var geometry2 = entity2.geometry(graph);
-               var bothLines = geometry1 === 'line' && geometry2 === 'line';
-
-               if (featureType1 === featureType2) {
-                   if (featureType1 === 'highway') {
-                       var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
-                       var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
-                       if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
-                           // one feature is a path but not both
-
-                           var roadFeature = entity1IsPath ? entity2 : entity1;
-                           if (nonCrossingHighways[roadFeature.tags.highway]) {
-                               // don't mark path connections with certain roads as crossings
-                               return {};
-                           }
-                           var pathFeature = entity1IsPath ? entity1 : entity2;
-                           if (['marked', 'unmarked'].indexOf(pathFeature.tags.crossing) !== -1) {
-                               // if the path is a crossing, match the crossing type
-                               return bothLines ? { highway: 'crossing', crossing: pathFeature.tags.crossing } : {};
-                           }
-                           // don't add a `crossing` subtag to ambiguous crossings
-                           return bothLines ? { highway: 'crossing' } : {};
-                       }
-                       return {};
-                   }
-                   if (featureType1 === 'waterway') { return {}; }
-                   if (featureType1 === 'railway') { return {}; }
-
-               } else {
-                   var featureTypes = [featureType1, featureType2];
-                   if (featureTypes.indexOf('highway') !== -1) {
-                       if (featureTypes.indexOf('railway') !== -1) {
-                           if (osmPathHighwayTagValues[entity1.tags.highway] ||
-                               osmPathHighwayTagValues[entity2.tags.highway]) {
-                               // path-rail connections use this tag
-                               return bothLines ? { railway: 'crossing' } : {};
-                           } else {
-                               // road-rail connections use this tag
-                               return bothLines ? { railway: 'level_crossing' } : {};
-                           }
-                       }
-
-                       if (featureTypes.indexOf('waterway') !== -1) {
-                           // do not allow fords on structures
-                           if (hasTag(entity1.tags, 'tunnel') && hasTag(entity2.tags, 'tunnel')) { return null; }
-                           if (hasTag(entity1.tags, 'bridge') && hasTag(entity2.tags, 'bridge')) { return null; }
+             }

 
 

-                           if (highwaysDisallowingFords[entity1.tags.highway] ||
-                               highwaysDisallowingFords[entity2.tags.highway]) {
-                               // do not allow fords on major highways
-                               return null;
-                           }
-                           return bothLines ? { ford: 'yes' } : {};
-                       }
-                   }
-               }
-               return null;
+             return 'other';

            }
 
            }
 

+           function shouldCheckWay(way) {
+             // don't flag issues where merging would create degenerate ways
+             if (way.nodes.length <= 2 || way.isClosed() && way.nodes.length <= 4) return false;
+             var bbox = way.extent(graph).bbox();
+             var hypotenuseMeters = geoSphericalDistance([bbox.minX, bbox.minY], [bbox.maxX, bbox.maxY]); // don't flag close nodes in very small ways

 
 

-           function findCrossingsByWay(way1, graph, tree) {
-               var edgeCrossInfos = [];
-               if (way1.type !== 'way') { return edgeCrossInfos; }
-
-               var way1FeatureType = getFeatureTypeForCrossingCheck(way1, graph);
-               if (way1FeatureType === null) { return edgeCrossInfos; }
-
-               var checkedSingleCrossingWays = {};
-
-               // declare vars ahead of time to reduce garbage collection
-               var i, j;
-               var extent;
-               var n1, n2, nA, nB, nAId, nBId;
-               var segment1, segment2;
-               var oneOnly;
-               var segmentInfos, segment2Info, way2, way2FeatureType;
-               var way1Nodes = graph.childNodes(way1);
-               var comparedWays = {};
-               for (i = 0; i < way1Nodes.length - 1; i++) {
-                   n1 = way1Nodes[i];
-                   n2 = way1Nodes[i + 1];
-                   extent = geoExtent([
-                       [
-                           Math.min(n1.loc[0], n2.loc[0]),
-                           Math.min(n1.loc[1], n2.loc[1])
-                       ],
-                       [
-                           Math.max(n1.loc[0], n2.loc[0]),
-                           Math.max(n1.loc[1], n2.loc[1])
-                       ]
-                   ]);
-
-                   // Optimize by only checking overlapping segments, not every segment
-                   // of overlapping ways
-                   segmentInfos = tree.waySegments(extent, graph);
-
-                   for (j = 0; j < segmentInfos.length; j++) {
-                       segment2Info = segmentInfos[j];
-
-                       // don't check for self-intersection in this validation
-                       if (segment2Info.wayId === way1.id) { continue; }
-
-                       // skip if this way was already checked and only one issue is needed
-                       if (checkedSingleCrossingWays[segment2Info.wayId]) { continue; }
-
-                       // mark this way as checked even if there are no crossings
-                       comparedWays[segment2Info.wayId] = true;
-
-                       way2 = graph.hasEntity(segment2Info.wayId);
-                       if (!way2) { continue; }
-
-                       // only check crossing highway, waterway, building, and railway
-                       way2FeatureType = getFeatureTypeForCrossingCheck(way2, graph);
-                       if (way2FeatureType === null ||
-                           isLegitCrossing(way1, way1FeatureType, way2, way2FeatureType)) {
-                           continue;
-                       }
-
-                       // create only one issue for building crossings
-                       oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
-
-                       nAId = segment2Info.nodes[0];
-                       nBId = segment2Info.nodes[1];
-                       if (nAId === n1.id || nAId === n2.id ||
-                           nBId === n1.id || nBId === n2.id) {
-                           // n1 or n2 is a connection node; skip
-                           continue;
-                       }
-                       nA = graph.hasEntity(nAId);
-                       if (!nA) { continue; }
-                       nB = graph.hasEntity(nBId);
-                       if (!nB) { continue; }
-
-                       segment1 = [n1.loc, n2.loc];
-                       segment2 = [nA.loc, nB.loc];
-                       var point = geoLineIntersection(segment1, segment2);
-                       if (point) {
-                           edgeCrossInfos.push({
-                               wayInfos: [
-                                   {
-                                       way: way1,
-                                       featureType: way1FeatureType,
-                                       edge: [n1.id, n2.id]
-                                   },
-                                   {
-                                       way: way2,
-                                       featureType: way2FeatureType,
-                                       edge: [nA.id, nB.id]
-                                   }
-                               ],
-                               crossPoint: point
-                           });
-                           if (oneOnly) {
-                               checkedSingleCrossingWays[way2.id] = true;
-                               break;
-                           }
-                       }
-                   }
-               }
-               return edgeCrossInfos;
+             if (hypotenuseMeters < 1.5) return false;
+             return true;

            }
 
            }
 

+           function getIssuesForWay(way) {
+             if (!shouldCheckWay(way)) return [];
+             var issues = [],
+                 nodes = graph.childNodes(way);

 
 

-           function waysToCheck(entity, graph) {
-               var featureType = getFeatureType(entity, graph);
-               if (!featureType) { return []; }
+             for (var i = 0; i < nodes.length - 1; i++) {
+               var node1 = nodes[i];
+               var node2 = nodes[i + 1];
+               var issue = getWayIssueIfAny(node1, node2, way);
+               if (issue) issues.push(issue);
+             }

 
 

-               if (entity.type === 'way') {
-                   return [entity];
-               } else if (entity.type === 'relation') {
-                   return entity.members.reduce(function(array, member) {
-                       if (member.type === 'way' &&
-                           // only look at geometry ways
-                           (!member.role || member.role === 'outer' || member.role === 'inner')) {
-                           var entity = graph.hasEntity(member.id);
-                           // don't add duplicates
-                           if (entity && array.indexOf(entity) === -1) {
-                               array.push(entity);
-                           }
-                       }
-                       return array;
-                   }, []);
-               }
-               return [];
+             return issues;

            }
 
            }
 

+           function getIssuesForVertex(node, parentWays) {
+             var issues = [];

 
 

-           var validation = function checkCrossingWays(entity, graph) {
-
-               var tree = context.history().tree();
-
-               var ways = waysToCheck(entity, graph);
-
-               var issues = [];
-               // declare these here to reduce garbage collection
-               var wayIndex, crossingIndex, crossings;
-               for (wayIndex in ways) {
-                   crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
-                   for (crossingIndex in crossings) {
-                       issues.push(createIssue(crossings[crossingIndex], graph));
-                   }
-               }
-               return issues;
-           };
-
-
-           function createIssue(crossing, graph) {
-
-               // use the entities with the tags that define the feature type
-               crossing.wayInfos.sort(function(way1Info, way2Info) {
-                   var type1 = way1Info.featureType;
-                   var type2 = way2Info.featureType;
-                   if (type1 === type2) {
-                       return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
-                   } else if (type1 === 'waterway') {
-                       return true;
-                   } else if (type2 === 'waterway') {
-                       return false;
-                   }
-                   return type1 < type2;
-               });
-               var entities = crossing.wayInfos.map(function(wayInfo) {
-                   return getFeatureWithFeatureTypeTagsForWay(wayInfo.way, graph);
-               });
-               var edges = [crossing.wayInfos[0].edge, crossing.wayInfos[1].edge];
-               var featureTypes = [crossing.wayInfos[0].featureType, crossing.wayInfos[1].featureType];
-
-               var connectionTags = tagsForConnectionNodeIfAllowed(entities[0], entities[1], graph);
-
-               var featureType1 = crossing.wayInfos[0].featureType;
-               var featureType2 = crossing.wayInfos[1].featureType;
-
-               var isCrossingIndoors = taggedAsIndoor(entities[0].tags) && taggedAsIndoor(entities[1].tags);
-               var isCrossingTunnels = allowsTunnel(featureType1) && hasTag(entities[0].tags, 'tunnel') &&
-                                       allowsTunnel(featureType2) && hasTag(entities[1].tags, 'tunnel');
-               var isCrossingBridges = allowsBridge(featureType1) && hasTag(entities[0].tags, 'bridge') &&
-                                       allowsBridge(featureType2) && hasTag(entities[1].tags, 'bridge');
-
-               var subtype = [featureType1, featureType2].sort().join('-');
-
-               var crossingTypeID = subtype;
-
-               if (isCrossingIndoors) {
-                   crossingTypeID = 'indoor-indoor';
-               } else if (isCrossingTunnels) {
-                   crossingTypeID = 'tunnel-tunnel';
-               } else if (isCrossingBridges) {
-                   crossingTypeID = 'bridge-bridge';
-               }
-               if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
-                   crossingTypeID += '_connectable';
-               }
-
-               return new validationIssue({
-                   type: type,
-                   subtype: subtype,
-                   severity: 'warning',
-                   message: function(context) {
-                       var graph = context.graph();
-                       var entity1 = graph.hasEntity(this.entityIds[0]),
-                           entity2 = graph.hasEntity(this.entityIds[1]);
-                       return (entity1 && entity2) ? _t('issues.crossing_ways.message', {
-                           feature: utilDisplayLabel(entity1, graph),
-                           feature2: utilDisplayLabel(entity2, graph)
-                       }) : '';
-                   },
-                   reference: showReference,
-                   entityIds: entities.map(function(entity) {
-                       return entity.id;
-                   }),
-                   data: {
-                       edges: edges,
-                       featureTypes: featureTypes,
-                       connectionTags: connectionTags
-                   },
-                   // differentiate based on the loc since two ways can cross multiple times
-                   hash: crossing.crossPoint.toString() +
-                       // if the edges change then so does the fix
-                       edges.slice().sort(function(edge1, edge2) {
-                           // order to assure hash is deterministic
-                           return edge1[0] < edge2[0] ? -1 : 1;
-                       }).toString() +
-                       // ensure the correct connection tags are added in the fix
-                       JSON.stringify(connectionTags),
-                   loc: crossing.crossPoint,
-                   dynamicFixes: function(context) {
-                       var mode = context.mode();
-                       if (!mode || mode.id !== 'select' || mode.selectedIDs().length !== 1) { return []; }
-
-                       var selectedIndex = this.entityIds[0] === mode.selectedIDs()[0] ? 0 : 1;
-                       var selectedFeatureType = this.data.featureTypes[selectedIndex];
-                       var otherFeatureType = this.data.featureTypes[selectedIndex === 0 ? 1 : 0];
-
-                       var fixes = [];
-
-                       if (connectionTags) {
-                           fixes.push(makeConnectWaysFix(this.data.connectionTags));
-                       }
-
-                       if (isCrossingIndoors) {
-                           fixes.push(new validationIssueFix({
-                               icon: 'iD-icon-layers',
-                               title: _t('issues.fix.use_different_levels.title')
-                           }));
-                       } else if (isCrossingTunnels ||
-                           isCrossingBridges ||
-                           featureType1 === 'building' ||
-                           featureType2 === 'building')  {
-
-                           fixes.push(makeChangeLayerFix('higher'));
-                           fixes.push(makeChangeLayerFix('lower'));
-
-                       // can only add bridge/tunnel if both features are lines
-                       } else if (context.graph().geometry(this.entityIds[0]) === 'line' &&
-                           context.graph().geometry(this.entityIds[1]) === 'line') {
-
-                           // don't recommend adding bridges to waterways since they're uncommmon
-                           if (allowsBridge(selectedFeatureType) && selectedFeatureType !== 'waterway') {
-                               fixes.push(makeAddBridgeOrTunnelFix('add_a_bridge', 'temaki-bridge', 'bridge'));
-                           }
-
-                           // don't recommend adding tunnels under waterways since they're uncommmon
-                           var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
-                           if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
-                               fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
-                           }
-                       }
+             function checkForCloseness(node1, node2, way) {
+               var issue = getWayIssueIfAny(node1, node2, way);
+               if (issue) issues.push(issue);
+             }

 
 

-                       // repositioning the features is always an option
-                       fixes.push(new validationIssueFix({
-                           icon: 'iD-operation-move',
-                           title: _t('issues.fix.reposition_features.title')
-                       }));
+             for (var i = 0; i < parentWays.length; i++) {
+               var parentWay = parentWays[i];
+               if (!shouldCheckWay(parentWay)) continue;
+               var lastIndex = parentWay.nodes.length - 1;

 
 

-                       return fixes;
+               for (var j = 0; j < parentWay.nodes.length; j++) {
+                 if (j !== 0) {
+                   if (parentWay.nodes[j - 1] === node.id) {
+                     checkForCloseness(node, graph.entity(parentWay.nodes[j]), parentWay);

                    }
                    }

-               });
-
-               function showReference(selection) {
-                   selection.selectAll('.issue-reference')
-                       .data([0])
-                       .enter()
-                       .append('div')
-                       .attr('class', 'issue-reference')
-                       .text(_t('issues.crossing_ways.' + crossingTypeID + '.reference'));
-               }
-           }
-
-           function makeAddBridgeOrTunnelFix(fixTitleID, iconName, bridgeOrTunnel){
-               return new validationIssueFix({
-                   icon: iconName,
-                   title: _t('issues.fix.' + fixTitleID + '.title'),
-                   onClick: function(context) {
-                       var mode = context.mode();
-                       if (!mode || mode.id !== 'select') { return; }
-
-                       var selectedIDs = mode.selectedIDs();
-                       if (selectedIDs.length !== 1) { return; }
-
-                       var selectedWayID = selectedIDs[0];
-                       if (!context.hasEntity(selectedWayID)) { return; }
-
-                       var resultWayIDs = [selectedWayID];
-
-                       var edge, crossedEdge, crossedWayID;
-                       if (this.issue.entityIds[0] === selectedWayID) {
-                           edge = this.issue.data.edges[0];
-                           crossedEdge = this.issue.data.edges[1];
-                           crossedWayID = this.issue.entityIds[1];
-                       } else {
-                           edge = this.issue.data.edges[1];
-                           crossedEdge = this.issue.data.edges[0];
-                           crossedWayID = this.issue.entityIds[0];
-                       }
-
-                       var crossingLoc = this.issue.loc;
-
-                       var projection = context.projection;
-
-                       var action = function actionAddStructure(graph) {
-
-                           var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
-
-                           var crossedWay = graph.hasEntity(crossedWayID);
-                           // use the explicit width of the crossed feature as the structure length, if available
-                           var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
-                           if (!structLengthMeters) {
-                               // if no explicit width is set, approximate the width based on the tags
-                               structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
-                           }
-                           if (structLengthMeters) {
-                               if (getFeatureType(crossedWay, graph) === 'railway') {
-                                   // bridges over railways are generally much longer than the rail bed itself, compensate
-                                   structLengthMeters *= 2;
-                               }
-                           } else {
-                               // should ideally never land here since all rail/water/road tags should have an implied width
-                               structLengthMeters = 8;
-                           }
-
-                           var a1 = geoAngle(edgeNodes[0], edgeNodes[1], projection) + Math.PI;
-                           var a2 = geoAngle(graph.entity(crossedEdge[0]), graph.entity(crossedEdge[1]), projection) + Math.PI;
-                           var crossingAngle = Math.max(a1, a2) - Math.min(a1, a2);
-                           if (crossingAngle > Math.PI) { crossingAngle -= Math.PI; }
-                           // lengthen the structure to account for the angle of the crossing
-                           structLengthMeters = ((structLengthMeters / 2) / Math.sin(crossingAngle)) * 2;
-
-                           // add padding since the structure must extend past the edges of the crossed feature
-                           structLengthMeters += 4;
-
-                           // clamp the length to a reasonable range
-                           structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
-
-                           function geomToProj(geoPoint) {
-                               return [
-                                   geoLonToMeters(geoPoint[0], geoPoint[1]),
-                                   geoLatToMeters(geoPoint[1])
-                               ];
-                           }
-                           function projToGeom(projPoint) {
-                               var lat = geoMetersToLat(projPoint[1]);
-                               return [
-                                   geoMetersToLon(projPoint[0], lat),
-                                   lat
-                               ];
-                           }
-
-                           var projEdgeNode1 = geomToProj(edgeNodes[0].loc);
-                           var projEdgeNode2 = geomToProj(edgeNodes[1].loc);
-
-                           var projectedAngle = geoVecAngle(projEdgeNode1, projEdgeNode2);
-
-                           var projectedCrossingLoc = geomToProj(crossingLoc);
-                           var linearToSphericalMetersRatio = geoVecLength(projEdgeNode1, projEdgeNode2) /
-                               geoSphericalDistance(edgeNodes[0].loc, edgeNodes[1].loc);
-
-                           function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
-                               var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
-                               return projToGeom([
-                                   projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters,
-                                   projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters
-                               ]);
-                           }
-
-                           var endpointLocGetter1 = function(lengthMeters) {
-                               return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
-                           };
-                           var endpointLocGetter2 = function(lengthMeters) {
-                               return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
-                           };
-
-                           // avoid creating very short edges from splitting too close to another node
-                           var minEdgeLengthMeters = 0.55;
-
-                           // decide where to bound the structure along the way, splitting as necessary
-                           function determineEndpoint(edge, endNode, locGetter) {
-                               var newNode;
-
-                               var idealLengthMeters = structLengthMeters / 2;
-
-                               // distance between the crossing location and the end of the edge,
-                               // the maximum length of this side of the structure
-                               var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
-
-                               if (crossingToEdgeEndDistance - idealLengthMeters > minEdgeLengthMeters) {
-                                   // the edge is long enough to insert a new node
-
-                                   // the loc that would result in the full expected length
-                                   var idealNodeLoc = locGetter(idealLengthMeters);
-
-                                   newNode = osmNode();
-                                   graph = actionAddMidpoint({ loc: idealNodeLoc, edge: edge }, newNode)(graph);
-
-                               } else {
-                                   var edgeCount = 0;
-                                   endNode.parentIntersectionWays(graph).forEach(function(way) {
-                                       way.nodes.forEach(function(nodeID) {
-                                           if (nodeID === endNode.id) {
-                                               if ((endNode.id === way.first() && endNode.id !== way.last()) ||
-                                                   (endNode.id === way.last() && endNode.id !== way.first())) {
-                                                   edgeCount += 1;
-                                               } else {
-                                                   edgeCount += 2;
-                                               }
-                                           }
-                                       });
-                                   });
-
-                                   if (edgeCount >= 3) {
-                                       // the end node is a junction, try to leave a segment
-                                       // between it and the structure - #7202
-
-                                       var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;
-                                       if (insetLength > minEdgeLengthMeters) {
-                                           var insetNodeLoc = locGetter(insetLength);
-                                           newNode = osmNode();
-                                           graph = actionAddMidpoint({ loc: insetNodeLoc, edge: edge }, newNode)(graph);
-                                       }
-                                   }
-                               }
-
-                               // if the edge is too short to subdivide as desired, then
-                               // just bound the structure at the existing end node
-                               if (!newNode) { newNode = endNode; }
-
-                               var splitAction = actionSplit(newNode.id)
-                                   .limitWays(resultWayIDs); // only split selected or created ways
-
-                               // do the split
-                               graph = splitAction(graph);
-                               if (splitAction.getCreatedWayIDs().length) {
-                                   resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
-                               }
-
-                               return newNode;
-                           }
-
-                           var structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
-                           var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
-
-                           var structureWay = resultWayIDs.map(function(id) {
-                               return graph.entity(id);
-                           }).find(function(way) {
-                               return way.nodes.indexOf(structEndNode1.id) !== -1 &&
-                                   way.nodes.indexOf(structEndNode2.id) !== -1;
-                           });
-
-                           var tags = Object.assign({}, structureWay.tags); // copy tags
-                           if (bridgeOrTunnel === 'bridge'){
-                               tags.bridge = 'yes';
-                               tags.layer = '1';
-                           } else {
-                               var tunnelValue = 'yes';
-                               if (getFeatureType(structureWay, graph) === 'waterway') {
-                                   // use `tunnel=culvert` for waterways by default
-                                   tunnelValue = 'culvert';
-                               }
-                               tags.tunnel = tunnelValue;
-                               tags.layer = '-1';
-                           }
-                           // apply the structure tags to the way
-                           graph = actionChangeTags(structureWay.id, tags)(graph);
-                           return graph;
-                       };
+                 }

 
 

-                       context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
-                       context.enter(modeSelect(context, resultWayIDs));
+                 if (j !== lastIndex) {
+                   if (parentWay.nodes[j + 1] === node.id) {
+                     checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);

                    }
                    }

-               });
-           }
-
-           function makeConnectWaysFix(connectionTags) {
-
-               var fixTitleID = 'connect_features';
-               if (connectionTags.ford) {
-                   fixTitleID = 'connect_using_ford';
+                 }

                }
                }

+             }

 
 

-               return new validationIssueFix({
-                   icon: 'iD-icon-crossing',
-                   title: _t('issues.fix.' + fixTitleID + '.title'),
-                   onClick: function(context) {
-                       var loc = this.issue.loc;
-                       var connectionTags = this.issue.data.connectionTags;
-                       var edges = this.issue.data.edges;
-
-                       context.perform(
-                           function actionConnectCrossingWays(graph) {
-                               // create the new node for the points
-                               var node = osmNode({ loc: loc, tags: connectionTags });
-                               graph = graph.replace(node);
-
-                               var nodesToMerge = [node.id];
-                               var mergeThresholdInMeters = 0.75;
-
-                               edges.forEach(function(edge) {
-                                   var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
-                                   var closestNodeInfo = geoSphericalClosestNode(edgeNodes, loc);
-                                   // if there is already a point nearby, use that
-                                   if (closestNodeInfo.distance < mergeThresholdInMeters) {
-                                       nodesToMerge.push(closestNodeInfo.node.id);
-                                   // else add the new node to the way
-                                   } else {
-                                       graph = actionAddMidpoint({loc: loc, edge: edge}, node)(graph);
-                                   }
-                               });
-
-                               if (nodesToMerge.length > 1) {
-                                   // if we're using nearby nodes, merge them with the new node
-                                   graph = actionMergeNodes(nodesToMerge, loc)(graph);
-                               }
-
-                               return graph;
-                           },
-                           _t('issues.fix.connect_crossing_features.annotation')
-                       );
-                   }
-               });
-           }
-
-           function makeChangeLayerFix(higherOrLower) {
-               return new validationIssueFix({
-                   icon: 'iD-icon-' + (higherOrLower === 'higher' ? 'up' : 'down'),
-                   title: _t('issues.fix.tag_this_as_' + higherOrLower + '.title'),
-                   onClick: function(context) {
-
-                       var mode = context.mode();
-                       if (!mode || mode.id !== 'select') { return; }
-
-                       var selectedIDs = mode.selectedIDs();
-                       if (selectedIDs.length !== 1) { return; }
-
-                       var selectedID = selectedIDs[0];
-                       if (!this.issue.entityIds.some(function(entityId) {
-                           return entityId === selectedID;
-                       })) { return; }
-
-                       var entity = context.hasEntity(selectedID);
-                       if (!entity) { return; }
-
-                       var tags = Object.assign({}, entity.tags);   // shallow copy
-                       var layer = tags.layer && Number(tags.layer);
-                       if (layer && !isNaN(layer)) {
-                           if (higherOrLower === 'higher') {
-                               layer += 1;
-                           } else {
-                               layer -= 1;
-                           }
-                       } else {
-                           if (higherOrLower === 'higher') {
-                               layer = 1;
-                           } else {
-                               layer = -1;
-                           }
-                       }
-                       tags.layer = layer.toString();
-                       context.perform(
-                           actionChangeTags(entity.id, tags),
-                           _t('operations.change_tags.annotation')
-                       );
-                   }
-               });
+             return issues;

            }
 
            }
 

-           validation.type = type;
-
-           return validation;
-       }
+           function thresholdMetersForWay(way) {
+             if (!shouldCheckWay(way)) return 0;
+             var wayType = wayTypeFor(way); // don't flag boundaries since they might be highly detailed and can't be easily verified

 
 

-       function validationDisconnectedWay() {
-           var type = 'disconnected_way';
+             if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail

 
 

-           function isTaggedAsHighway(entity) {
-               return osmRoutableHighwayTagValues[entity.tags.highway];
+             if (wayType === 'indoor') return 0.01;
+             if (wayType === 'building') return 0.05;
+             if (wayType === 'path') return 0.1;
+             return 0.2;

            }
 
            }
 

-           var validation = function checkDisconnectedWay(entity, graph) {
-
-               var routingIslandWays = routingIslandForEntity(entity);
-               if (!routingIslandWays) { return []; }
-
-               return [new validationIssue({
-                   type: type,
-                   subtype: 'highway',
-                   severity: 'warning',
-                   message: function(context) {
-                       if (this.entityIds.length === 1) {
-                           var entity = context.hasEntity(this.entityIds[0]);
-                           return entity ? _t('issues.disconnected_way.highway.message', { highway: utilDisplayLabel(entity, context.graph()) }) : '';
-                       }
-                       return _t('issues.disconnected_way.routable.message.multiple', { count: this.entityIds.length.toString() });
-                   },
-                   reference: showReference,
-                   entityIds: Array.from(routingIslandWays).map(function(way) { return way.id; }),
-                   dynamicFixes: makeFixes
-               })];
-
-
-               function makeFixes(context) {
-
-                   var fixes = [];
-
-                   var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
-
-                   if (singleEntity) {
-
-                       if (singleEntity.type === 'way' && !singleEntity.isClosed()) {
-
-                           var textDirection = _mainLocalizer.textDirection();
-
-                           var startFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.first(), 'start');
-                           if (startFix) { fixes.push(startFix); }
-
-                           var endFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.last(), 'end');
-                           if (endFix) { fixes.push(endFix); }
-                       }
-                       if (!fixes.length) {
-                           fixes.push(new validationIssueFix({
-                               title: _t('issues.fix.connect_feature.title')
-                           }));
-                       }
-
-                       fixes.push(new validationIssueFix({
-                           icon: 'iD-operation-delete',
-                           title: _t('issues.fix.delete_feature.title'),
-                           entityIds: [singleEntity.id],
-                           onClick: function(context) {
-                               var id = this.issue.entityIds[0];
-                               var operation = operationDelete(context, [id]);
-                               if (!operation.disabled()) {
-                                   operation();
-                               }
-                           }
-                       }));
-                   } else {
-                       fixes.push(new validationIssueFix({
-                           title: _t('issues.fix.connect_features.title')
-                       }));
-                   }
-
-                   return fixes;
-               }
-
-
-               function showReference(selection) {
-                   selection.selectAll('.issue-reference')
-                       .data([0])
-                       .enter()
-                       .append('div')
-                       .attr('class', 'issue-reference')
-                       .text(_t('issues.disconnected_way.routable.reference'));
-               }
-
-               function routingIslandForEntity(entity) {
-
-                   var routingIsland = new Set();  // the interconnected routable features
-                   var waysToCheck = [];           // the queue of remaining routable ways to traverse
-
-                   function queueParentWays(node) {
-                       graph.parentWays(node).forEach(function(parentWay) {
-                           if (!routingIsland.has(parentWay) &&    // only check each feature once
-                               isRoutableWay(parentWay, false)) {  // only check routable features
-                               routingIsland.add(parentWay);
-                               waysToCheck.push(parentWay);
-                           }
-                       });
-                   }
-
-                   if (entity.type === 'way' && isRoutableWay(entity, true)) {
-
-                       routingIsland.add(entity);
-                       waysToCheck.push(entity);
-
-                   } else if (entity.type === 'node' && isRoutableNode(entity)) {
-
-                       routingIsland.add(entity);
-                       queueParentWays(entity);
-
-                   } else {
-                       // this feature isn't routable, cannot be a routing island
-                       return null;
-                   }
-
-                   while (waysToCheck.length) {
-                       var wayToCheck = waysToCheck.pop();
-                       var childNodes = graph.childNodes(wayToCheck);
-                       for (var i in childNodes) {
-                           var vertex = childNodes[i];
-
-                           if (isConnectedVertex(vertex)) {
-                               // found a link to the wider network, not a routing island
-                               return null;
-                           }
-
-                           if (isRoutableNode(vertex)) {
-                               routingIsland.add(vertex);
-                           }
-
-                           queueParentWays(vertex);
-                       }
-                   }
-
-                   // no network link found, this is a routing island, return its members
-                   return routingIsland;
-               }
-
-               function isConnectedVertex(vertex) {
-                   // assume ways overlapping unloaded tiles are connected to the wider road network  - #5938
-                   var osm = services.osm;
-                   if (osm && !osm.isDataLoaded(vertex.loc)) { return true; }
-
-                   // entrances are considered connected
-                   if (vertex.tags.entrance &&
-                       vertex.tags.entrance !== 'no') { return true; }
-                   if (vertex.tags.amenity === 'parking_entrance') { return true; }
-
-                   return false;
-               }
-
-               function isRoutableNode(node) {
-                   // treat elevators as distinct features in the highway network
-                   if (node.tags.highway === 'elevator') { return true; }
-                   return false;
-               }
-
-               function isRoutableWay(way, ignoreInnerWays) {
-                   if (isTaggedAsHighway(way) || way.tags.route === 'ferry') { return true; }
-
-                   return graph.parentRelations(way).some(function(parentRelation) {
-                       if (parentRelation.tags.type === 'route' &&
-                           parentRelation.tags.route === 'ferry') { return true; }
-
-                       if (parentRelation.isMultipolygon() &&
-                           isTaggedAsHighway(parentRelation) &&
-                           (!ignoreInnerWays || parentRelation.memberById(way.id).role !== 'inner')) { return true; }
-                   });
-               }
-
-               function makeContinueDrawingFixIfAllowed(textDirection, vertexID, whichEnd) {
-                   var vertex = graph.hasEntity(vertexID);
-                   if (!vertex || vertex.tags.noexit === 'yes') { return null; }
-
-                   var useLeftContinue = (whichEnd === 'start' && textDirection === 'ltr') ||
-                       (whichEnd === 'end' && textDirection === 'rtl');
-
-                   return new validationIssueFix({
-                       icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
-                       title: _t('issues.fix.continue_from_' + whichEnd + '.title'),
-                       entityIds: [vertexID],
-                       onClick: function(context) {
-                           var wayId = this.issue.entityIds[0];
-                           var way = context.hasEntity(wayId);
-                           var vertexId = this.entityIds[0];
-                           var vertex = context.hasEntity(vertexId);
-
-                           if (!way || !vertex) { return; }
-
-                           // make sure the vertex is actually visible and editable
-                           var map = context.map();
-                           if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-                               map.zoomToEase(vertex);
-                           }
-
-                           context.enter(
-                               modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true)
-                           );
-                       }
-                   });
-               }
-
-           };
-
-           validation.type = type;
-
-           return validation;
-       }
-
-       function validationFormatting() {
-           var type = 'invalid_format';
-
-           var validation = function(entity) {
-               var issues = [];
-
-               function isValidEmail(email) {
-                   // Emails in OSM are going to be official so they should be pretty simple
-                   // Using negated lists to better support all possible unicode characters (#6494)
-                   var valid_email = /^[^\(\)\\,":;<>@\[\]]+@[^\(\)\\,":;<>@\[\]\.]+(?:\.[a-z0-9-]+)*$/i;
-
-                   // An empty value is also acceptable
-                   return (!email || valid_email.test(email));
-               }
-               /*
-               function isSchemePresent(url) {
-                   var valid_scheme = /^https?:\/\//i;
-                   return (!url || valid_scheme.test(url));
-               }
-               */
-               function showReferenceEmail(selection) {
-                   selection.selectAll('.issue-reference')
-                       .data([0])
-                       .enter()
-                       .append('div')
-                       .attr('class', 'issue-reference')
-                       .text(_t('issues.invalid_format.email.reference'));
-               }
-               /*
-               function showReferenceWebsite(selection) {
-                   selection.selectAll('.issue-reference')
-                       .data([0])
-                       .enter()
-                       .append('div')
-                       .attr('class', 'issue-reference')
-                       .text(t('issues.invalid_format.website.reference'));
-               }
-
-               if (entity.tags.website) {
-                   // Multiple websites are possible
-                   // If ever we support ES6, arrow functions make this nicer
-                   var websites = entity.tags.website
-                       .split(';')
-                       .map(function(s) { return s.trim(); })
-                       .filter(function(x) { return !isSchemePresent(x); });
-
-                   if (websites.length) {
-                       issues.push(new validationIssue({
-                           type: type,
-                           subtype: 'website',
-                           severity: 'warning',
-                           message: function(context) {
-                               var entity = context.hasEntity(this.entityIds[0]);
-                               return entity ? t('issues.invalid_format.website.message' + this.data,
-                                   { feature: utilDisplayLabel(entity, context.graph()), site: websites.join(', ') }) : '';
-                           },
-                           reference: showReferenceWebsite,
-                           entityIds: [entity.id],
-                           hash: websites.join(),
-                           data: (websites.length > 1) ? '_multi' : ''
-                       }));
-                   }
-               }
-               */
-               if (entity.tags.email) {
-                   // Multiple emails are possible
-                   var emails = entity.tags.email
-                       .split(';')
-                       .map(function(s) { return s.trim(); })
-                       .filter(function(x) { return !isValidEmail(x); });
-
-                   if (emails.length) {
-                       issues.push(new validationIssue({
-                           type: type,
-                           subtype: 'email',
-                           severity: 'warning',
-                           message: function(context) {
-                               var entity = context.hasEntity(this.entityIds[0]);
-                               return entity ? _t('issues.invalid_format.email.message' + this.data,
-                                   { feature: utilDisplayLabel(entity, context.graph()), email: emails.join(', ') }) : '';
-                           },
-                           reference: showReferenceEmail,
-                           entityIds: [entity.id],
-                           hash: emails.join(),
-                           data: (emails.length > 1) ? '_multi' : ''
-                       }));
-                   }
-               }
-
-               return issues;
-           };
-
-           validation.type = type;
-
-           return validation;
-       }
-
-       function validationHelpRequest(context) {
-           var type = 'help_request';
-
-           var validation = function checkFixmeTag(entity) {
-
-               if (!entity.tags.fixme) { return []; }
-
-               // don't flag fixmes on features added by the user
-               if (entity.version === undefined) { return []; }
-
-               if (entity.v !== undefined) {
-                   var baseEntity = context.history().base().hasEntity(entity.id);
-                   // don't flag fixmes added by the user on existing features
-                   if (!baseEntity || !baseEntity.tags.fixme) { return []; }
-               }
-
-               return [new validationIssue({
-                   type: type,
-                   subtype: 'fixme_tag',
-                   severity: 'warning',
-                   message: function(context) {
-                       var entity = context.hasEntity(this.entityIds[0]);
-                       return entity ? _t('issues.fixme_tag.message', { feature: utilDisplayLabel(entity, context.graph()) }) : '';
-                   },
-                   dynamicFixes: function() {
-                       return [
-                           new validationIssueFix({
-                               title: _t('issues.fix.address_the_concern.title')
-                           })
-                       ];
-                   },
-                   reference: showReference,
-                   entityIds: [entity.id]
-               })];
-
-               function showReference(selection) {
-                   selection.selectAll('.issue-reference')
-                       .data([0])
-                       .enter()
-                       .append('div')
-                       .attr('class', 'issue-reference')
-                       .text(_t('issues.fixme_tag.reference'));
-               }
-           };
-
-           validation.type = type;
-
-           return validation;
-       }
-
-       function validationImpossibleOneway() {
-           var type = 'impossible_oneway';
-
-           var validation = function checkImpossibleOneway(entity, graph) {
-
-               if (entity.type !== 'way' || entity.geometry(graph) !== 'line') { return []; }
-
-               if (entity.isClosed()) { return []; }
+           function getIssuesForDetachedPoint(node) {
+             var issues = [];
+             var lon = node.loc[0];
+             var lat = node.loc[1];
+             var lon_range = geoMetersToLon(pointThresholdMeters, lat) / 2;
+             var lat_range = geoMetersToLat(pointThresholdMeters) / 2;
+             var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]);
+             var intersected = context.history().tree().intersects(queryExtent, graph);

 
 

-               if (!typeForWay(entity)) { return []; }
+             for (var j = 0; j < intersected.length; j++) {
+               var nearby = intersected[j];
+               if (nearby.id === node.id) continue;
+               if (nearby.type !== 'node' || nearby.geometry(graph) !== 'point') continue;

 
 

-               if (!isOneway(entity)) { return []; }
-
-               var firstIssues = issuesForNode(entity, entity.first());
-               var lastIssues = issuesForNode(entity, entity.last());
-
-               return firstIssues.concat(lastIssues);
-
-               function typeForWay(way) {
-                   if (way.geometry(graph) !== 'line') { return null; }
-
-                   if (osmRoutableHighwayTagValues[way.tags.highway]) { return 'highway'; }
-                   if (osmFlowingWaterwayTagValues[way.tags.waterway]) { return 'waterway'; }
-                   return null;
-               }
-
-               function isOneway(way) {
-                   if (way.tags.oneway === 'yes') { return true; }
-                   if (way.tags.oneway) { return false; }
-
-                   for (var key in way.tags) {
-                       if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
-                           return true;
-                       }
-                   }
-                   return false;
-               }
-
-               function nodeOccursMoreThanOnce(way, nodeID) {
-                   var occurences = 0;
-                   for (var index in way.nodes) {
-                       if (way.nodes[index] === nodeID) {
-                           occurences += 1;
-                           if (occurences > 1) { return true; }
-                       }
-                   }
-                   return false;
-               }
-
-               function isConnectedViaOtherTypes(way, node) {
-
-                   var wayType = typeForWay(way);
-
-                   if (wayType === 'highway') {
-                       // entrances are considered connected
-                       if (node.tags.entrance && node.tags.entrance !== 'no') { return true; }
-                       if (node.tags.amenity === 'parking_entrance') { return true; }
-                   } else if (wayType === 'waterway') {
-                       if (node.id === way.first()) {
-                           // multiple waterways may start at the same spring
-                           if (node.tags.natural === 'spring') { return true; }
-                       } else {
-                           // multiple waterways may end at the same drain
-                           if (node.tags.manhole === 'drain') { return true; }
-                       }
-                   }
-
-                   return graph.parentWays(node).some(function(parentWay) {
-                       if (parentWay.id === way.id) { return false; }
-
-                       if (wayType === 'highway') {
-
-                           // allow connections to highway areas
-                           if (parentWay.geometry(graph) === 'area' &&
-                               osmRoutableHighwayTagValues[parentWay.tags.highway]) { return true; }
-
-                           // count connections to ferry routes as connected
-                           if (parentWay.tags.route === 'ferry') { return true; }
-
-                           return graph.parentRelations(parentWay).some(function(parentRelation) {
-                               if (parentRelation.tags.type === 'route' &&
-                                   parentRelation.tags.route === 'ferry') { return true; }
-
-                               // allow connections to highway multipolygons
-                               return parentRelation.isMultipolygon() && osmRoutableHighwayTagValues[parentRelation.tags.highway];
-                           });
-                       } else if (wayType === 'waterway') {
-                           // multiple waterways may start or end at a water body at the same node
-                           if (parentWay.tags.natural === 'water' ||
-                               parentWay.tags.natural === 'coastline') { return true; }
-                       }
-                       return false;
-                   });
-               }
-
-               function issuesForNode(way, nodeID) {
-
-                   var isFirst = nodeID === way.first();
-
-                   var wayType = typeForWay(way);
-
-                   // ignore if this way is self-connected at this node
-                   if (nodeOccursMoreThanOnce(way, nodeID)) { return []; }
-
-                   var osm = services.osm;
-                   if (!osm) { return []; }
-
-                   var node = graph.hasEntity(nodeID);
-
-                   // ignore if this node or its tile are unloaded
-                   if (!node || !osm.isDataLoaded(node.loc)) { return []; }
-
-                   if (isConnectedViaOtherTypes(way, node)) { return []; }
-
-                   var attachedWaysOfSameType = graph.parentWays(node).filter(function(parentWay) {
-                       if (parentWay.id === way.id) { return false; }
-                       return typeForWay(parentWay) === wayType;
-                   });
-
-                   // assume it's okay for waterways to start or end disconnected for now
-                   if (wayType === 'waterway' && attachedWaysOfSameType.length === 0) { return []; }
-
-                   var attachedOneways = attachedWaysOfSameType.filter(function(attachedWay) {
-                       return isOneway(attachedWay);
-                   });
-
-                   // ignore if the way is connected to some non-oneway features
-                   if (attachedOneways.length < attachedWaysOfSameType.length) { return []; }
-
-                   if (attachedOneways.length) {
-                       var connectedEndpointsOkay = attachedOneways.some(function(attachedOneway) {
-                           if ((isFirst ? attachedOneway.first() : attachedOneway.last()) !== nodeID) { return true; }
-                           if (nodeOccursMoreThanOnce(attachedOneway, nodeID)) { return true; }
-                           return false;
-                       });
-                       if (connectedEndpointsOkay) { return []; }
-                   }
+               if (nearby.loc === node.loc || geoSphericalDistance(node.loc, nearby.loc) < pointThresholdMeters) {
+                 // allow very close points if tags indicate the z-axis might vary
+                 var zAxisKeys = {
+                   layer: true,
+                   level: true,
+                   'addr:housenumber': true,
+                   'addr:unit': true
+                 };
+                 var zAxisDifferentiates = false;

 
 

-                   var placement = isFirst ? 'start' : 'end',
-                       messageID = wayType + '.',
-                       referenceID = wayType + '.';
+                 for (var key in zAxisKeys) {
+                   var nodeValue = node.tags[key] || '0';
+                   var nearbyValue = nearby.tags[key] || '0';

 
 

-                   if (wayType === 'waterway') {
-                       messageID += 'connected.' + placement;
-                       referenceID += 'connected';
-                   } else {
-                       messageID += placement;
-                       referenceID += placement;
+                   if (nodeValue !== nearbyValue) {
+                     zAxisDifferentiates = true;
+                     break;

                    }
                    }

+                 }

 
 

-                   return [new validationIssue({
-                       type: type,
-                       subtype: wayType,
-                       severity: 'warning',
-                       message: function(context) {
-                           var entity = context.hasEntity(this.entityIds[0]);
-                           return entity ? _t('issues.impossible_oneway.' + messageID + '.message', {
-                               feature: utilDisplayLabel(entity, context.graph())
-                           }) : '';
-                       },
-                       reference: getReference(referenceID),
-                       entityIds: [way.id, node.id],
-                       dynamicFixes: function() {
-
-                           var fixes = [];
-
-                           if (attachedOneways.length) {
-                               fixes.push(new validationIssueFix({
-                                   icon: 'iD-operation-reverse',
-                                   title: _t('issues.fix.reverse_feature.title'),
-                                   entityIds: [way.id],
-                                   onClick: function(context) {
-                                       var id = this.issue.entityIds[0];
-                                       context.perform(actionReverse(id), _t('operations.reverse.annotation'));
-                                   }
-                               }));
-                           }
-                           if (node.tags.noexit !== 'yes') {
-                               var textDirection = _mainLocalizer.textDirection();
-                               var useLeftContinue = (isFirst && textDirection === 'ltr') ||
-                                   (!isFirst && textDirection === 'rtl');
-                               fixes.push(new validationIssueFix({
-                                   icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
-                                   title: _t('issues.fix.continue_from_' + (isFirst ? 'start' : 'end') + '.title'),
-                                   onClick: function(context) {
-                                       var entityID = this.issue.entityIds[0];
-                                       var vertexID = this.issue.entityIds[1];
-                                       var way = context.entity(entityID);
-                                       var vertex = context.entity(vertexID);
-                                       continueDrawing(way, vertex, context);
-                                   }
-                               }));
-                           }
-
-                           return fixes;
-                       },
-                       loc: node.loc
-                   })];
-
-                   function getReference(referenceID) {
-                       return function showReference(selection) {
-                           selection.selectAll('.issue-reference')
-                               .data([0])
-                               .enter()
-                               .append('div')
-                               .attr('class', 'issue-reference')
-                               .text(_t('issues.impossible_oneway.' + referenceID + '.reference'));
-                       };
+                 if (zAxisDifferentiates) continue;
+                 issues.push(new validationIssue({
+                   type: type,
+                   subtype: 'detached',
+                   severity: 'warning',
+                   message: function message(context) {
+                     var entity = context.hasEntity(this.entityIds[0]),
+                         entity2 = context.hasEntity(this.entityIds[1]);
+                     return entity && entity2 ? _t.html('issues.close_nodes.detached.message', {
+                       feature: utilDisplayLabel(entity, context.graph()),
+                       feature2: utilDisplayLabel(entity2, context.graph())
+                     }) : '';
+                   },
+                   reference: showReference,
+                   entityIds: [node.id, nearby.id],
+                   dynamicFixes: function dynamicFixes() {
+                     return [new validationIssueFix({
+                       icon: 'iD-operation-disconnect',
+                       title: _t.html('issues.fix.move_points_apart.title')
+                     }), new validationIssueFix({
+                       icon: 'iD-icon-layers',
+                       title: _t.html('issues.fix.use_different_layers_or_levels.title')
+                     })];

                    }
                    }

+                 }));

                }
                }

-           };
+             }

 
 

-           function continueDrawing(way, vertex, context) {
-               // make sure the vertex is actually visible and editable
-               var map = context.map();
-               if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-                   map.zoomToEase(vertex);
-               }
+             return issues;

 
 

-               context.enter(
-                   modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true)
-               );
+             function showReference(selection) {
+               var referenceText = _t('issues.close_nodes.detached.reference');
+               selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
+             }

            }
 
            }
 

-           validation.type = type;
+           function getWayIssueIfAny(node1, node2, way) {
+             if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
+               return null;
+             }

 
 

-           return validation;
-       }
+             if (node1.loc !== node2.loc) {
+               var parentWays1 = graph.parentWays(node1);
+               var parentWays2 = new Set(graph.parentWays(node2));
+               var sharedWays = parentWays1.filter(function (parentWay) {
+                 return parentWays2.has(parentWay);
+               });
+               var thresholds = sharedWays.map(function (parentWay) {
+                 return thresholdMetersForWay(parentWay);
+               });
+               var threshold = Math.min.apply(Math, _toConsumableArray(thresholds));
+               var distance = geoSphericalDistance(node1.loc, node2.loc);
+               if (distance > threshold) return null;
+             }

 
 

-       function validationIncompatibleSource() {
-           var type = 'incompatible_source';
-           var invalidSources = [
-               {
-                   id:'google', regex:'google', exceptRegex: 'books.google|Google Books|drive.google|googledrive|Google Drive'
+             return new validationIssue({
+               type: type,
+               subtype: 'vertices',
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(this.entityIds[0]);
+                 return entity ? _t.html('issues.close_nodes.message', {
+                   way: utilDisplayLabel(entity, context.graph())
+                 }) : '';
+               },
+               reference: showReference,
+               entityIds: [way.id, node1.id, node2.id],
+               loc: node1.loc,
+               dynamicFixes: function dynamicFixes() {
+                 return [new validationIssueFix({
+                   icon: 'iD-icon-plus',
+                   title: _t.html('issues.fix.merge_points.title'),
+                   onClick: function onClick(context) {
+                     var entityIds = this.issue.entityIds;
+                     var action = actionMergeNodes([entityIds[1], entityIds[2]]);
+                     context.perform(action, _t('issues.fix.merge_close_vertices.annotation'));
+                   }
+                 }), new validationIssueFix({
+                   icon: 'iD-operation-disconnect',
+                   title: _t.html('issues.fix.move_points_apart.title')
+                 })];

                }
                }

-           ];
+             });

 
 

-           var validation = function checkIncompatibleSource(entity) {
+             function showReference(selection) {
+               var referenceText = _t('issues.close_nodes.reference');
+               selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
+             }
+           }
+         };

 
 

-               var entitySources = entity.tags && entity.tags.source && entity.tags.source.split(';');
+         validation.type = type;
+         return validation;
+       }

 
 

-               if (!entitySources) { return []; }
+       function validationCrossingWays(context) {
+         var type = 'crossing_ways'; // returns the way or its parent relation, whichever has a useful feature type

 
 

-               var issues = [];
+         function getFeatureWithFeatureTypeTagsForWay(way, graph) {
+           if (getFeatureType(way, graph) === null) {
+             // if the way doesn't match a feature type, check its parent relations
+             var parentRels = graph.parentRelations(way);

 
 

-               invalidSources.forEach(function(invalidSource) {
+             for (var i = 0; i < parentRels.length; i++) {
+               var rel = parentRels[i];

 
 

-                   var hasInvalidSource = entitySources.some(function(source) {
-                       if (!source.match(new RegExp(invalidSource.regex, 'i'))) { return false; }
-                       if (invalidSource.exceptRegex && source.match(new RegExp(invalidSource.exceptRegex, 'i'))) { return false; }
-                       return true;
-                   });
+               if (getFeatureType(rel, graph) !== null) {
+                 return rel;
+               }
+             }
+           }

 
 

-                   if (!hasInvalidSource) { return; }
+           return way;
+         }

 
 

-                   issues.push(new validationIssue({
-                       type: type,
-                       severity: 'warning',
-                       message: function(context) {
-                           var entity = context.hasEntity(this.entityIds[0]);
-                           return entity ? _t('issues.incompatible_source.' + invalidSource.id + '.feature.message', {
-                               feature: utilDisplayLabel(entity, context.graph())
-                           }) : '';
-                       },
-                       reference: getReference(invalidSource.id),
-                       entityIds: [entity.id],
-                       dynamicFixes: function() {
-                           return [
-                               new validationIssueFix({
-                                   title: _t('issues.fix.remove_proprietary_data.title')
-                               })
-                           ];
-                       }
-                   }));
-               });
+         function hasTag(tags, key) {
+           return tags[key] !== undefined && tags[key] !== 'no';
+         }

 
 

-               return issues;
+         function taggedAsIndoor(tags) {
+           return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
+         }

 
 

+         function allowsBridge(featureType) {
+           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+         }

 
 

-               function getReference(id) {
-                   return function showReference(selection) {
-                       selection.selectAll('.issue-reference')
-                           .data([0])
-                           .enter()
-                           .append('div')
-                           .attr('class', 'issue-reference')
-                           .text(_t('issues.incompatible_source.' + id + '.reference'));
-                   };
-               }
-           };
+         function allowsTunnel(featureType) {
+           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+         } // discard

 
 

-           validation.type = type;

 
 

-           return validation;
-       }
+         var ignoredBuildings = {
+           demolished: true,
+           dismantled: true,
+           proposed: true,
+           razed: true
+         };

 
 

-       function validationMaprules() {
-           var type = 'maprules';
+         function getFeatureType(entity, graph) {
+           var geometry = entity.geometry(graph);
+           if (geometry !== 'line' && geometry !== 'area') return null;
+           var tags = entity.tags;
+           if (hasTag(tags, 'building') && !ignoredBuildings[tags.building]) return 'building';
+           if (hasTag(tags, 'highway') && osmRoutableHighwayTagValues[tags.highway]) return 'highway'; // don't check railway or waterway areas

 
 

-           var validation = function checkMaprules(entity, graph) {
-               if (!services.maprules) { return []; }
+           if (geometry !== 'line') return null;
+           if (hasTag(tags, 'railway') && osmRailwayTrackTagValues[tags.railway]) return 'railway';
+           if (hasTag(tags, 'waterway') && osmFlowingWaterwayTagValues[tags.waterway]) return 'waterway';
+           return null;
+         }

 
 

-               var rules = services.maprules.validationRules();
-               var issues = [];
+         function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
+           // assume 0 by default
+           var level1 = tags1.level || '0';
+           var level2 = tags2.level || '0';

 
 

-               for (var i = 0; i < rules.length; i++) {
-                   var rule = rules[i];
-                   rule.findIssues(entity, graph, issues);
-               }
+           if (taggedAsIndoor(tags1) && taggedAsIndoor(tags2) && level1 !== level2) {
+             // assume features don't interact if they're indoor on different levels
+             return true;
+           } // assume 0 by default; don't use way.layer() since we account for structures here

 
 

-               return issues;
-           };

 
 

+           var layer1 = tags1.layer || '0';
+           var layer2 = tags2.layer || '0';

 
 

-           validation.type = type;
+           if (allowsBridge(featureType1) && allowsBridge(featureType2)) {
+             if (hasTag(tags1, 'bridge') && !hasTag(tags2, 'bridge')) return true;
+             if (!hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge')) return true; // crossing bridges must use different layers

 
 

-           return validation;
-       }
+             if (hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge') && layer1 !== layer2) return true;
+           } else if (allowsBridge(featureType1) && hasTag(tags1, 'bridge')) return true;else if (allowsBridge(featureType2) && hasTag(tags2, 'bridge')) return true;

 
 

-       function validationMismatchedGeometry() {
-           var type = 'mismatched_geometry';
+           if (allowsTunnel(featureType1) && allowsTunnel(featureType2)) {
+             if (hasTag(tags1, 'tunnel') && !hasTag(tags2, 'tunnel')) return true;
+             if (!hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel')) return true; // crossing tunnels must use different layers

 
 

-           function tagSuggestingLineIsArea(entity) {
-               if (entity.type !== 'way' || entity.isClosed()) { return null; }
+             if (hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel') && layer1 !== layer2) return true;
+           } else if (allowsTunnel(featureType1) && hasTag(tags1, 'tunnel')) return true;else if (allowsTunnel(featureType2) && hasTag(tags2, 'tunnel')) return true; // don't flag crossing waterways and pier/highways

 
 

-               var tagSuggestingArea = entity.tagSuggestingArea();
-               if (!tagSuggestingArea) {
-                   return null;
-               }

 
 

-               var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
-               var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
-               if (asLine && asArea && (asLine === asArea)) {
-                   // these tags also allow lines and making this an area wouldn't matter
-                   return null;
-               }
+           if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
+           if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;

 
 

-               return tagSuggestingArea;
+           if (featureType1 === 'building' || featureType2 === 'building') {
+             // for building crossings, different layers are enough
+             if (layer1 !== layer2) return true;

            }
 
            }
 

+           return false;
+         } // highway values for which we shouldn't recommend connecting to waterways

 
 

-           function makeConnectEndpointsFixOnClick(way, graph) {
-               // must have at least three nodes to close this automatically
-               if (way.nodes.length < 3) { return null; }

 
 

-               var nodes = graph.childNodes(way), testNodes;
-               var firstToLastDistanceMeters = geoSphericalDistance(nodes[0].loc, nodes[nodes.length-1].loc);
+         var highwaysDisallowingFords = {
+           motorway: true,
+           motorway_link: true,
+           trunk: true,
+           trunk_link: true,
+           primary: true,
+           primary_link: true,
+           secondary: true,
+           secondary_link: true
+         };
+         var nonCrossingHighways = {
+           track: true
+         };

 
 

-               // if the distance is very small, attempt to merge the endpoints
-               if (firstToLastDistanceMeters < 0.75) {
-                   testNodes = nodes.slice();   // shallow copy
-                   testNodes.pop();
-                   testNodes.push(testNodes[0]);
-                   // make sure this will not create a self-intersection
-                   if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
-                       return function(context) {
-                           var way = context.entity(this.issue.entityIds[0]);
-                           context.perform(
-                               actionMergeNodes([way.nodes[0], way.nodes[way.nodes.length-1]], nodes[0].loc),
-                               _t('issues.fix.connect_endpoints.annotation')
-                           );
-                       };
-                   }
-               }
+         function tagsForConnectionNodeIfAllowed(entity1, entity2, graph) {
+           var featureType1 = getFeatureType(entity1, graph);
+           var featureType2 = getFeatureType(entity2, graph);
+           var geometry1 = entity1.geometry(graph);
+           var geometry2 = entity2.geometry(graph);
+           var bothLines = geometry1 === 'line' && geometry2 === 'line';

 
 

-               // if the points were not merged, attempt to close the way
-               testNodes = nodes.slice();   // shallow copy
-               testNodes.push(testNodes[0]);
-               // make sure this will not create a self-intersection
-               if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
-                   return function(context) {
-                       var wayId = this.issue.entityIds[0];
-                       var way = context.entity(wayId);
-                       var nodeId = way.nodes[0];
-                       var index = way.nodes.length;
-                       context.perform(
-                           actionAddVertex(wayId, nodeId, index),
-                           _t('issues.fix.connect_endpoints.annotation')
-                       );
-                   };
-               }
-           }
+           if (featureType1 === featureType2) {
+             if (featureType1 === 'highway') {
+               var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
+               var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];

 
 

-           function lineTaggedAsAreaIssue(entity) {
+               if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
+                 // one feature is a path but not both
+                 var roadFeature = entity1IsPath ? entity2 : entity1;

 
 

-               var tagSuggestingArea = tagSuggestingLineIsArea(entity);
-               if (!tagSuggestingArea) { return null; }
+                 if (nonCrossingHighways[roadFeature.tags.highway]) {
+                   // don't mark path connections with certain roads as crossings
+                   return {};
+                 }

 
 

-               return new validationIssue({
-                   type: type,
-                   subtype: 'area_as_line',
-                   severity: 'warning',
-                   message: function(context) {
-                       var entity = context.hasEntity(this.entityIds[0]);
-                       return entity ? _t('issues.tag_suggests_area.message', {
-                           feature: utilDisplayLabel(entity, context.graph()),
-                           tag: utilTagText({ tags: tagSuggestingArea })
-                       }) : '';
-                   },
-                   reference: showReference,
-                   entityIds: [entity.id],
-                   hash: JSON.stringify(tagSuggestingArea),
-                   dynamicFixes: function(context) {
+                 var pathFeature = entity1IsPath ? entity1 : entity2;

 
 

-                       var fixes = [];
+                 if (['marked', 'unmarked'].indexOf(pathFeature.tags.crossing) !== -1) {
+                   // if the path is a crossing, match the crossing type
+                   return bothLines ? {
+                     highway: 'crossing',
+                     crossing: pathFeature.tags.crossing
+                   } : {};
+                 } // don't add a `crossing` subtag to ambiguous crossings

 
 

-                       var entity = context.entity(this.entityIds[0]);
-                       var connectEndsOnClick = makeConnectEndpointsFixOnClick(entity, context.graph());

 
 

-                       fixes.push(new validationIssueFix({
-                           title: _t('issues.fix.connect_endpoints.title'),
-                           onClick: connectEndsOnClick
-                       }));
+                 return bothLines ? {
+                   highway: 'crossing'
+                 } : {};
+               }

 
 

-                       fixes.push(new validationIssueFix({
-                           icon: 'iD-operation-delete',
-                           title: _t('issues.fix.remove_tag.title'),
-                           onClick: function(context) {
-                               var entityId = this.issue.entityIds[0];
-                               var entity = context.entity(entityId);
-                               var tags = Object.assign({}, entity.tags);  // shallow copy
-                               for (var key in tagSuggestingArea) {
-                                   delete tags[key];
-                               }
-                               context.perform(
-                                   actionChangeTags(entityId, tags),
-                                   _t('issues.fix.remove_tag.annotation')
-                               );
-                           }
-                       }));
+               return {};
+             }

 
 

-                       return fixes;
-                   }
-               });
+             if (featureType1 === 'waterway') return {};
+             if (featureType1 === 'railway') return {};
+           } else {
+             var featureTypes = [featureType1, featureType2];

 
 

+             if (featureTypes.indexOf('highway') !== -1) {
+               if (featureTypes.indexOf('railway') !== -1) {
+                 if (!bothLines) return {};
+                 var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';

 
 

-               function showReference(selection) {
-                   selection.selectAll('.issue-reference')
-                       .data([0])
-                       .enter()
-                       .append('div')
-                       .attr('class', 'issue-reference')
-                       .text(_t('issues.tag_suggests_area.reference'));
-               }
-           }
+                 if (osmPathHighwayTagValues[entity1.tags.highway] || osmPathHighwayTagValues[entity2.tags.highway]) {
+                   // path-tram connections use this tag
+                   if (isTram) return {
+                     railway: 'tram_crossing'
+                   }; // other path-rail connections use this tag

 
 

-           function vertexTaggedAsPointIssue(entity, graph) {
-               // we only care about nodes
-               if (entity.type !== 'node') { return null; }
+                   return {
+                     railway: 'crossing'
+                   };
+                 } else {
+                   // path-tram connections use this tag
+                   if (isTram) return {
+                     railway: 'tram_level_crossing'
+                   }; // other road-rail connections use this tag

 
 

-               // ignore tagless points
-               if (Object.keys(entity.tags).length === 0) { return null; }
+                   return {
+                     railway: 'level_crossing'
+                   };
+                 }
+               }

 
 

-               // address lines are special so just ignore them
-               if (entity.isOnAddressLine(graph)) { return null; }
+               if (featureTypes.indexOf('waterway') !== -1) {
+                 // do not allow fords on structures
+                 if (hasTag(entity1.tags, 'tunnel') && hasTag(entity2.tags, 'tunnel')) return null;
+                 if (hasTag(entity1.tags, 'bridge') && hasTag(entity2.tags, 'bridge')) return null;

 
 

-               var geometry = entity.geometry(graph);
-               var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
+                 if (highwaysDisallowingFords[entity1.tags.highway] || highwaysDisallowingFords[entity2.tags.highway]) {
+                   // do not allow fords on major highways
+                   return null;
+                 }

 
 

-               if (geometry === 'point' && !allowedGeometries.point && allowedGeometries.vertex) {
+                 return bothLines ? {
+                   ford: 'yes'
+                 } : {};
+               }
+             }
+           }

 
 

-                   return new validationIssue({
-                       type: type,
-                       subtype: 'vertex_as_point',
-                       severity: 'warning',
-                       message: function(context) {
-                           var entity = context.hasEntity(this.entityIds[0]);
-                           return entity ? _t('issues.vertex_as_point.message', {
-                               feature: utilDisplayLabel(entity, context.graph())
-                           }) : '';
-                       },
-                       reference: function showReference(selection) {
-                           selection.selectAll('.issue-reference')
-                               .data([0])
-                               .enter()
-                               .append('div')
-                               .attr('class', 'issue-reference')
-                               .text(_t('issues.vertex_as_point.reference'));
-                       },
-                       entityIds: [entity.id]
-                   });
+           return null;
+         }

 
 

-               } else if (geometry === 'vertex' && !allowedGeometries.vertex && allowedGeometries.point) {
+         function findCrossingsByWay(way1, graph, tree) {
+           var edgeCrossInfos = [];
+           if (way1.type !== 'way') return edgeCrossInfos;
+           var taggedFeature1 = getFeatureWithFeatureTypeTagsForWay(way1, graph);
+           var way1FeatureType = getFeatureType(taggedFeature1, graph);
+           if (way1FeatureType === null) return edgeCrossInfos;
+           var checkedSingleCrossingWays = {}; // declare vars ahead of time to reduce garbage collection

 
 

-                   return new validationIssue({
-                       type: type,
-                       subtype: 'point_as_vertex',
-                       severity: 'warning',
-                       message: function(context) {
-                           var entity = context.hasEntity(this.entityIds[0]);
-                           return entity ? _t('issues.point_as_vertex.message', {
-                               feature: utilDisplayLabel(entity, context.graph())
-                           }) : '';
-                       },
-                       reference: function showReference(selection) {
-                           selection.selectAll('.issue-reference')
-                               .data([0])
-                               .enter()
-                               .append('div')
-                               .attr('class', 'issue-reference')
-                               .text(_t('issues.point_as_vertex.reference'));
-                       },
-                       entityIds: [entity.id],
-                       dynamicFixes: function(context) {
-
-                           var entityId = this.entityIds[0];
-
-                           var extractOnClick = null;
-                           if (!context.hasHiddenConnections(entityId)) {
-
-                               extractOnClick = function(context) {
-                                   var entityId = this.issue.entityIds[0];
-                                   var action = actionExtract(entityId);
-                                   context.perform(
-                                       action,
-                                       _t('operations.extract.annotation.single')
-                                   );
-                                   // re-enter mode to trigger updates
-                                   context.enter(modeSelect(context, [action.getExtractedNodeID()]));
-                               };
-                           }
+           var i, j;
+           var extent;
+           var n1, n2, nA, nB, nAId, nBId;
+           var segment1, segment2;
+           var oneOnly;
+           var segmentInfos, segment2Info, way2, taggedFeature2, way2FeatureType;
+           var way1Nodes = graph.childNodes(way1);
+           var comparedWays = {};

 
 

-                           return [
-                               new validationIssueFix({
-                                   icon: 'iD-operation-extract',
-                                   title: _t('issues.fix.extract_point.title'),
-                                   onClick: extractOnClick
-                               })
-                           ];
-                       }
-                   });
-               }
+           for (i = 0; i < way1Nodes.length - 1; i++) {
+             n1 = way1Nodes[i];
+             n2 = way1Nodes[i + 1];
+             extent = geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]); // Optimize by only checking overlapping segments, not every segment
+             // of overlapping ways

 
 

-               return null;
-           }
+             segmentInfos = tree.waySegments(extent, graph);

 
 

-           function unclosedMultipolygonPartIssues(entity, graph) {
+             for (j = 0; j < segmentInfos.length; j++) {
+               segment2Info = segmentInfos[j]; // don't check for self-intersection in this validation

 
 

-               if (entity.type !== 'relation' ||
-                   !entity.isMultipolygon() ||
-                   entity.isDegenerate() ||
-                   // cannot determine issues for incompletely-downloaded relations
-                   !entity.isComplete(graph)) { return null; }
+               if (segment2Info.wayId === way1.id) continue; // skip if this way was already checked and only one issue is needed

 
 

-               var sequences = osmJoinWays(entity.members, graph);
+               if (checkedSingleCrossingWays[segment2Info.wayId]) continue; // mark this way as checked even if there are no crossings

 
 

-               var issues = [];
+               comparedWays[segment2Info.wayId] = true;
+               way2 = graph.hasEntity(segment2Info.wayId);
+               if (!way2) continue;
+               taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph); // only check crossing highway, waterway, building, and railway

 
 

-               for (var i in sequences) {
-                   var sequence = sequences[i];
+               way2FeatureType = getFeatureType(taggedFeature2, graph);

 
 

-                   if (!sequence.nodes) { continue; }
+               if (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
+                 continue;
+               } // create only one issue for building crossings

 
 

-                   var firstNode = sequence.nodes[0];
-                   var lastNode = sequence.nodes[sequence.nodes.length - 1];

 
 

-                   // part is closed if the first and last nodes are the same
-                   if (firstNode === lastNode) { continue; }
+               oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
+               nAId = segment2Info.nodes[0];
+               nBId = segment2Info.nodes[1];

 
 

-                   var issue = new validationIssue({
-                       type: type,
-                       subtype: 'unclosed_multipolygon_part',
-                       severity: 'warning',
-                       message: function(context) {
-                           var entity = context.hasEntity(this.entityIds[0]);
-                           return entity ? _t('issues.unclosed_multipolygon_part.message', {
-                               feature: utilDisplayLabel(entity, context.graph())
-                           }) : '';
-                       },
-                       reference: showReference,
-                       loc: sequence.nodes[0].loc,
-                       entityIds: [entity.id],
-                       hash: sequence.map(function(way) {
-                           return way.id;
-                       }).join()
-                   });
-                   issues.push(issue);
+               if (nAId === n1.id || nAId === n2.id || nBId === n1.id || nBId === n2.id) {
+                 // n1 or n2 is a connection node; skip
+                 continue;

                }
 
                }
 

-               return issues;
+               nA = graph.hasEntity(nAId);
+               if (!nA) continue;
+               nB = graph.hasEntity(nBId);
+               if (!nB) continue;
+               segment1 = [n1.loc, n2.loc];
+               segment2 = [nA.loc, nB.loc];
+               var point = geoLineIntersection(segment1, segment2);
+
+               if (point) {
+                 edgeCrossInfos.push({
+                   wayInfos: [{
+                     way: way1,
+                     featureType: way1FeatureType,
+                     edge: [n1.id, n2.id]
+                   }, {
+                     way: way2,
+                     featureType: way2FeatureType,
+                     edge: [nA.id, nB.id]
+                   }],
+                   crossPoint: point
+                 });

 
 

-               function showReference(selection) {
-                   selection.selectAll('.issue-reference')
-                       .data([0])
-                       .enter()
-                       .append('div')
-                       .attr('class', 'issue-reference')
-                       .text(_t('issues.unclosed_multipolygon_part.reference'));
+                 if (oneOnly) {
+                   checkedSingleCrossingWays[way2.id] = true;
+                   break;
+                 }

                }
                }

+             }

            }
 
            }
 

-           var validation = function checkMismatchedGeometry(entity, graph) {
-               var issues = [
-                   vertexTaggedAsPointIssue(entity, graph),
-                   lineTaggedAsAreaIssue(entity)
-               ];
-               issues = issues.concat(unclosedMultipolygonPartIssues(entity, graph));
-               return issues.filter(Boolean);
-           };
-
-           validation.type = type;
-
-           return validation;
-       }
+           return edgeCrossInfos;
+         }

 
 

-       function validationMissingRole() {
-           var type = 'missing_role';
+         function waysToCheck(entity, graph) {
+           var featureType = getFeatureType(entity, graph);
+           if (!featureType) return [];

 
 

-           var validation = function checkMissingRole(entity, graph) {
-               var issues = [];
-               if (entity.type === 'way') {
-                   graph.parentRelations(entity).forEach(function(relation) {
-                       if (!relation.isMultipolygon()) { return; }
+           if (entity.type === 'way') {
+             return [entity];
+           } else if (entity.type === 'relation') {
+             return entity.members.reduce(function (array, member) {
+               if (member.type === 'way' && ( // only look at geometry ways
+               !member.role || member.role === 'outer' || member.role === 'inner')) {
+                 var entity = graph.hasEntity(member.id); // don't add duplicates

 
 

-                       var member = relation.memberById(entity.id);
-                       if (member && isMissingRole(member)) {
-                           issues.push(makeIssue(entity, relation, member));
-                       }
-                   });
-               } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-                   entity.indexedMembers().forEach(function(member) {
-                       var way = graph.hasEntity(member.id);
-                       if (way && isMissingRole(member)) {
-                           issues.push(makeIssue(way, entity, member));
-                       }
-                   });
+                 if (entity && array.indexOf(entity) === -1) {
+                   array.push(entity);
+                 }

                }
 
                }
 

-               return issues;
-           };
-
-
-           function isMissingRole(member) {
-               return !member.role || !member.role.trim().length;
+               return array;
+             }, []);

            }
 
            }
 

+           return [];
+         }

 
 

-           function makeIssue(way, relation, member) {
-               return new validationIssue({
-                   type: type,
-                   severity: 'warning',
-                   message: function(context) {
-                       var member = context.hasEntity(this.entityIds[1]),
-                           relation = context.hasEntity(this.entityIds[0]);
-                       return (member && relation) ? _t('issues.missing_role.message', {
-                           member: utilDisplayLabel(member, context.graph()),
-                           relation: utilDisplayLabel(relation, context.graph())
-                       }) : '';
-                   },
-                   reference: showReference,
-                   entityIds: [relation.id, way.id],
-                   data: {
-                       member: member
-                   },
-                   hash: member.index.toString(),
-                   dynamicFixes: function() {
-                       return [
-                           makeAddRoleFix('inner'),
-                           makeAddRoleFix('outer'),
-                           new validationIssueFix({
-                               icon: 'iD-operation-delete',
-                               title: _t('issues.fix.remove_from_relation.title'),
-                               onClick: function(context) {
-                                   context.perform(
-                                       actionDeleteMember(this.issue.entityIds[0], this.issue.data.member.index),
-                                       _t('operations.delete_member.annotation')
-                                   );
-                               }
-                           })
-                       ];
-                   }
-               });
-
+         var validation = function checkCrossingWays(entity, graph) {
+           var tree = context.history().tree();
+           var ways = waysToCheck(entity, graph);
+           var issues = []; // declare these here to reduce garbage collection

 
 

-               function showReference(selection) {
-                   selection.selectAll('.issue-reference')
-                       .data([0])
-                       .enter()
-                       .append('div')
-                       .attr('class', 'issue-reference')
-                       .text(_t('issues.missing_role.multipolygon.reference'));
-               }
-           }
+           var wayIndex, crossingIndex, crossings;

 
 

+           for (wayIndex in ways) {
+             crossings = findCrossingsByWay(ways[wayIndex], graph, tree);

 
 

-           function makeAddRoleFix(role) {
-               return new validationIssueFix({
-                   title: _t('issues.fix.set_as_' + role + '.title'),
-                   onClick: function(context) {
-                       var oldMember = this.issue.data.member;
-                       var member = { id: this.issue.entityIds[1], type: oldMember.type, role: role };
-                       context.perform(
-                           actionChangeMember(this.issue.entityIds[0], member, oldMember.index),
-                           _t('operations.change_role.annotation')
-                       );
-                   }
-               });
+             for (crossingIndex in crossings) {
+               issues.push(createIssue(crossings[crossingIndex], graph));
+             }

            }
 
            }
 

-           validation.type = type;
-
-           return validation;
-       }
+           return issues;
+         };

 
 

-       function validationMissingTag(context) {
-           var type = 'missing_tag';
+         function createIssue(crossing, graph) {
+           // use the entities with the tags that define the feature type
+           crossing.wayInfos.sort(function (way1Info, way2Info) {
+             var type1 = way1Info.featureType;
+             var type2 = way2Info.featureType;

 
 

-           function hasDescriptiveTags(entity, graph) {
-               var keys = Object.keys(entity.tags)
-                   .filter(function(k) {
-                       if (k === 'area' || k === 'name') {
-                           return false;
-                       } else {
-                           return osmIsInterestingTag(k);
-                       }
-                   });
+             if (type1 === type2) {
+               return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
+             } else if (type1 === 'waterway') {
+               return true;
+             } else if (type2 === 'waterway') {
+               return false;
+             }

 
 

-               if (entity.type === 'relation' &&
-                   keys.length === 1 &&
-                   entity.tags.type === 'multipolygon') {
-                   // this relation's only interesting tag just says its a multipolygon,
-                   // which is not descriptive enough
+             return type1 < type2;
+           });
+           var entities = crossing.wayInfos.map(function (wayInfo) {
+             return getFeatureWithFeatureTypeTagsForWay(wayInfo.way, graph);
+           });
+           var edges = [crossing.wayInfos[0].edge, crossing.wayInfos[1].edge];
+           var featureTypes = [crossing.wayInfos[0].featureType, crossing.wayInfos[1].featureType];
+           var connectionTags = tagsForConnectionNodeIfAllowed(entities[0], entities[1], graph);
+           var featureType1 = crossing.wayInfos[0].featureType;
+           var featureType2 = crossing.wayInfos[1].featureType;
+           var isCrossingIndoors = taggedAsIndoor(entities[0].tags) && taggedAsIndoor(entities[1].tags);
+           var isCrossingTunnels = allowsTunnel(featureType1) && hasTag(entities[0].tags, 'tunnel') && allowsTunnel(featureType2) && hasTag(entities[1].tags, 'tunnel');
+           var isCrossingBridges = allowsBridge(featureType1) && hasTag(entities[0].tags, 'bridge') && allowsBridge(featureType2) && hasTag(entities[1].tags, 'bridge');
+           var subtype = [featureType1, featureType2].sort().join('-');
+           var crossingTypeID = subtype;
+
+           if (isCrossingIndoors) {
+             crossingTypeID = 'indoor-indoor';
+           } else if (isCrossingTunnels) {
+             crossingTypeID = 'tunnel-tunnel';
+           } else if (isCrossingBridges) {
+             crossingTypeID = 'bridge-bridge';
+           }
+
+           if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
+             crossingTypeID += '_connectable';
+           } // Differentiate based on the loc rounded to 4 digits, since two ways can cross multiple times.
+
+
+           var uniqueID = '' + crossing.crossPoint[0].toFixed(4) + ',' + crossing.crossPoint[1].toFixed(4);
+           return new validationIssue({
+             type: type,
+             subtype: subtype,
+             severity: 'warning',
+             message: function message(context) {
+               var graph = context.graph();
+               var entity1 = graph.hasEntity(this.entityIds[0]),
+                   entity2 = graph.hasEntity(this.entityIds[1]);
+               return entity1 && entity2 ? _t.html('issues.crossing_ways.message', {
+                 feature: utilDisplayLabel(entity1, graph),
+                 feature2: utilDisplayLabel(entity2, graph)
+               }) : '';
+             },
+             reference: showReference,
+             entityIds: entities.map(function (entity) {
+               return entity.id;
+             }),
+             data: {
+               edges: edges,
+               featureTypes: featureTypes,
+               connectionTags: connectionTags
+             },
+             hash: uniqueID,
+             loc: crossing.crossPoint,
+             dynamicFixes: function dynamicFixes(context) {
+               var mode = context.mode();
+               if (!mode || mode.id !== 'select' || mode.selectedIDs().length !== 1) return [];
+               var selectedIndex = this.entityIds[0] === mode.selectedIDs()[0] ? 0 : 1;
+               var selectedFeatureType = this.data.featureTypes[selectedIndex];
+               var otherFeatureType = this.data.featureTypes[selectedIndex === 0 ? 1 : 0];
+               var fixes = [];

 
 

-                   // It's okay for a simple multipolygon to have no descriptive tags
-                   // if its outer way has them (old model, see `outdated_tags.js`)
-                   return osmOldMultipolygonOuterMemberOfRelation(entity, graph);
+               if (connectionTags) {
+                 fixes.push(makeConnectWaysFix(this.data.connectionTags));

                }
 
                }
 

-               return keys.length > 0;
-           }
-
-           function isUnknownRoad(entity) {
-               return entity.type === 'way' && entity.tags.highway === 'road';
-           }
+               if (isCrossingIndoors) {
+                 fixes.push(new validationIssueFix({
+                   icon: 'iD-icon-layers',
+                   title: _t.html('issues.fix.use_different_levels.title')
+                 }));
+               } else if (isCrossingTunnels || isCrossingBridges || featureType1 === 'building' || featureType2 === 'building') {
+                 fixes.push(makeChangeLayerFix('higher'));
+                 fixes.push(makeChangeLayerFix('lower')); // can only add bridge/tunnel if both features are lines
+               } else if (context.graph().geometry(this.entityIds[0]) === 'line' && context.graph().geometry(this.entityIds[1]) === 'line') {
+                 // don't recommend adding bridges to waterways since they're uncommon
+                 if (allowsBridge(selectedFeatureType) && selectedFeatureType !== 'waterway') {
+                   fixes.push(makeAddBridgeOrTunnelFix('add_a_bridge', 'temaki-bridge', 'bridge'));
+                 } // don't recommend adding tunnels under waterways since they're uncommon

 
 

-           function isUntypedRelation(entity) {
-               return entity.type === 'relation' && !entity.tags.type;
-           }

 
 

-           var validation = function checkMissingTag(entity, graph) {
+                 var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';

 
 

-               var subtype;
+                 if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
+                   fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
+                 }
+               } // repositioning the features is always an option

 
 

-               var osm = context.connection();
-               var isUnloadedNode = entity.type === 'node' && osm && !osm.isDataLoaded(entity.loc);

 
 

-               // we can't know if the node is a vertex if the tile is undownloaded
-               if (!isUnloadedNode &&
-                   // allow untagged nodes that are part of ways
-                   entity.geometry(graph) !== 'vertex' &&
-                   // allow untagged entities that are part of relations
-                   !entity.hasParentRelations(graph)) {
+               fixes.push(new validationIssueFix({
+                 icon: 'iD-operation-move',
+                 title: _t.html('issues.fix.reposition_features.title')
+               }));
+               return fixes;
+             }
+           });

 
 

-                   if (Object.keys(entity.tags).length === 0) {
-                       subtype = 'any';
-                   } else if (!hasDescriptiveTags(entity, graph)) {
-                       subtype = 'descriptive';
-                   } else if (isUntypedRelation(entity)) {
-                       subtype = 'relation_type';
-                   }
-               }
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.crossing_ways.' + crossingTypeID + '.reference'));
+           }
+         }

 
 

-               // flag an unknown road even if it's a member of a relation
-               if (!subtype && isUnknownRoad(entity)) {
-                   subtype = 'highway_classification';
+         function makeAddBridgeOrTunnelFix(fixTitleID, iconName, bridgeOrTunnel) {
+           return new validationIssueFix({
+             icon: iconName,
+             title: _t.html('issues.fix.' + fixTitleID + '.title'),
+             onClick: function onClick(context) {
+               var mode = context.mode();
+               if (!mode || mode.id !== 'select') return;
+               var selectedIDs = mode.selectedIDs();
+               if (selectedIDs.length !== 1) return;
+               var selectedWayID = selectedIDs[0];
+               if (!context.hasEntity(selectedWayID)) return;
+               var resultWayIDs = [selectedWayID];
+               var edge, crossedEdge, crossedWayID;
+
+               if (this.issue.entityIds[0] === selectedWayID) {
+                 edge = this.issue.data.edges[0];
+                 crossedEdge = this.issue.data.edges[1];
+                 crossedWayID = this.issue.entityIds[1];
+               } else {
+                 edge = this.issue.data.edges[1];
+                 crossedEdge = this.issue.data.edges[0];
+                 crossedWayID = this.issue.entityIds[0];

                }
 
                }
 

-               if (!subtype) { return []; }
+               var crossingLoc = this.issue.loc;
+               var projection = context.projection;

 
 

-               var messageID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag.' + subtype;
-               var referenceID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag';
+               var action = function actionAddStructure(graph) {
+                 var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+                 var crossedWay = graph.hasEntity(crossedWayID); // use the explicit width of the crossed feature as the structure length, if available

 
 

-               // can always delete if the user created it in the first place..
-               var canDelete = (entity.version === undefined || entity.v !== undefined);
-               var severity = (canDelete && subtype !== 'highway_classification') ? 'error' : 'warning';
+                 var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);

 
 

-               return [new validationIssue({
-                   type: type,
-                   subtype: subtype,
-                   severity: severity,
-                   message: function(context) {
-                       var entity = context.hasEntity(this.entityIds[0]);
-                       return entity ? _t('issues.' + messageID + '.message', {
-                           feature: utilDisplayLabel(entity, context.graph())
-                       }) : '';
-                   },
-                   reference: showReference,
-                   entityIds: [entity.id],
-                   dynamicFixes: function(context) {
+                 if (!structLengthMeters) {
+                   // if no explicit width is set, approximate the width based on the tags
+                   structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
+                 }

 
 

-                       var fixes = [];
+                 if (structLengthMeters) {
+                   if (getFeatureType(crossedWay, graph) === 'railway') {
+                     // bridges over railways are generally much longer than the rail bed itself, compensate
+                     structLengthMeters *= 2;
+                   }
+                 } else {
+                   // should ideally never land here since all rail/water/road tags should have an implied width
+                   structLengthMeters = 8;
+                 }

 
 

-                       var selectFixType = subtype === 'highway_classification' ? 'select_road_type' : 'select_preset';
+                 var a1 = geoAngle(edgeNodes[0], edgeNodes[1], projection) + Math.PI;
+                 var a2 = geoAngle(graph.entity(crossedEdge[0]), graph.entity(crossedEdge[1]), projection) + Math.PI;
+                 var crossingAngle = Math.max(a1, a2) - Math.min(a1, a2);
+                 if (crossingAngle > Math.PI) crossingAngle -= Math.PI; // lengthen the structure to account for the angle of the crossing

 
 

-                       fixes.push(new validationIssueFix({
-                           icon: 'iD-icon-search',
-                           title: _t('issues.fix.' + selectFixType + '.title'),
-                           onClick: function(context) {
-                               context.ui().sidebar.showPresetList();
-                           }
-                       }));
+                 structLengthMeters = structLengthMeters / 2 / Math.sin(crossingAngle) * 2; // add padding since the structure must extend past the edges of the crossed feature

 
 

-                       var deleteOnClick;
-
-                       var id = this.entityIds[0];
-                       var operation = operationDelete(context, [id]);
-                       var disabledReasonID = operation.disabled();
-                       if (!disabledReasonID) {
-                           deleteOnClick = function(context) {
-                               var id = this.issue.entityIds[0];
-                               var operation = operationDelete(context, [id]);
-                               if (!operation.disabled()) {
-                                   operation();
-                               }
-                           };
-                       }
+                 structLengthMeters += 4; // clamp the length to a reasonable range

 
 

-                       fixes.push(
-                           new validationIssueFix({
-                               icon: 'iD-operation-delete',
-                               title: _t('issues.fix.delete_feature.title'),
-                               disabledReason: disabledReasonID ? _t('operations.delete.' + disabledReasonID + '.single') : undefined,
-                               onClick: deleteOnClick
-                           })
-                       );
+                 structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);

 
 

-                       return fixes;
-                   }
-               })];
+                 function geomToProj(geoPoint) {
+                   return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
+                 }

 
 

-               function showReference(selection) {
-                   selection.selectAll('.issue-reference')
-                       .data([0])
-                       .enter()
-                       .append('div')
-                       .attr('class', 'issue-reference')
-                       .text(_t('issues.' + referenceID + '.reference'));
-               }
-           };
+                 function projToGeom(projPoint) {
+                   var lat = geoMetersToLat(projPoint[1]);
+                   return [geoMetersToLon(projPoint[0], lat), lat];
+                 }

 
 

-           validation.type = type;
+                 var projEdgeNode1 = geomToProj(edgeNodes[0].loc);
+                 var projEdgeNode2 = geomToProj(edgeNodes[1].loc);
+                 var projectedAngle = geoVecAngle(projEdgeNode1, projEdgeNode2);
+                 var projectedCrossingLoc = geomToProj(crossingLoc);
+                 var linearToSphericalMetersRatio = geoVecLength(projEdgeNode1, projEdgeNode2) / geoSphericalDistance(edgeNodes[0].loc, edgeNodes[1].loc);

 
 

-           return validation;
-       }
+                 function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
+                   var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
+                   return projToGeom([projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters, projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters]);
+                 }

 
 

-       // remove spaces, punctuation, diacritics
-       var simplify = function (str) {
-         return diacritics.remove(
-           str
-             .replace(/&/g, 'and')
-             .replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u2016\u2017\u2020-\u2027\u2030-\u2038\u203b-\u203e\u2041-\u2043\u2047-\u2051\u2053\u2055-\u205e\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00\u2e01\u2e06-\u2e08\u2e0b\u2e0e-\u2e16\u2e18\u2e19\u2e1b\u2e1e\u2e1f\u2e2a-\u2e2e\u2e30-\u2e39\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g,'')
-             .toLowerCase()
-         );
-       };
+                 var endpointLocGetter1 = function endpointLocGetter1(lengthMeters) {
+                   return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
+                 };

 
 

-       // toParts - split a name-suggestion-index key into parts
-       // {
-       //   kvnd:        "amenity/fast_food|Thaï Express~(North America)",
-       //   kvn:         "amenity/fast_food|Thaï Express",
-       //   kv:          "amenity/fast_food",
-       //   k:           "amenity",
-       //   v:           "fast_food",
-       //   n:           "Thaï Express",
-       //   d:           "(North America)",
-       //   nsimple:     "thaiexpress",
-       //   kvnnsimple:  "amenity/fast_food|thaiexpress"
-       // }
-       var to_parts = function (kvnd) {
-         var parts = {};
-         parts.kvnd = kvnd;
+                 var endpointLocGetter2 = function endpointLocGetter2(lengthMeters) {
+                   return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
+                 }; // avoid creating very short edges from splitting too close to another node

 
 

-         var kvndparts = kvnd.split('~', 2);
-         if (kvndparts.length > 1) { parts.d = kvndparts[1]; }

 
 

-         parts.kvn = kvndparts[0];
-         var kvnparts = parts.kvn.split('|', 2);
-         if (kvnparts.length > 1) { parts.n = kvnparts[1]; }
+                 var minEdgeLengthMeters = 0.55; // decide where to bound the structure along the way, splitting as necessary

 
 

-         parts.kv = kvnparts[0];
-         var kvparts = parts.kv.split('/', 2);
-         parts.k = kvparts[0];
-         parts.v = kvparts[1];
+                 function determineEndpoint(edge, endNode, locGetter) {
+                   var newNode;
+                   var idealLengthMeters = structLengthMeters / 2; // distance between the crossing location and the end of the edge,
+                   // the maximum length of this side of the structure

 
 

-         parts.nsimple = simplify(parts.n);
-         parts.kvnsimple = parts.kv + '|' + parts.nsimple;
-         return parts;
-       };
+                   var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);

 
 

-       var matchGroups = {adult_gaming_centre:["amenity/casino","amenity/gambling","leisure/adult_gaming_centre"],beauty:["shop/beauty","shop/hairdresser_supply"],bed:["shop/bed","shop/furniture"],beverages:["shop/alcohol","shop/beverages"],camping:["leisure/park","tourism/camp_site","tourism/caravan_site"],car_parts:["shop/car_parts","shop/car_repair","shop/tires","shop/tyres"],confectionery:["shop/candy","shop/chocolate","shop/confectionery"],convenience:["shop/beauty","shop/chemist","shop/convenience","shop/cosmetics","shop/newsagent"],coworking:["amenity/coworking_space","office/coworking","office/coworking_space"],electronics:["office/telecommunication","shop/computer","shop/electronics","shop/hifi","shop/mobile","shop/mobile_phone","shop/telecommunication"],fashion:["shop/accessories","shop/bag","shop/botique","shop/clothes","shop/department_store","shop/fashion","shop/fashion_accessories","shop/sports","shop/shoes"],financial:["amenity/bank","office/accountant","office/financial","office/financial_advisor","office/tax_advisor","shop/tax"],fitness:["leisure/fitness_centre","leisure/fitness_center","leisure/sports_centre","leisure/sports_center"],food:["amenity/cafe","amenity/fast_food","amenity/ice_cream","amenity/restaurant","shop/bakery","shop/ice_cream","shop/pastry","shop/tea","shop/coffee"],fuel:["amenity/fuel","shop/gas","shop/convenience;gas","shop/gas;convenience"],gift:["shop/gift","shop/card","shop/cards","shop/stationery"],hardware:["shop/carpet","shop/diy","shop/doityourself","shop/doors","shop/electrical","shop/flooring","shop/hardware","shop/power_tools","shop/tool_hire","shop/tools","shop/trade"],health_food:["shop/health","shop/health_food","shop/herbalist","shop/nutrition_supplements"],houseware:["shop/houseware","shop/interior_decoration"],lodging:["tourism/hotel","tourism/motel"],money_transfer:["amenity/money_transfer","shop/money_transfer"],outdoor:["shop/outdoor","shop/sports"],rental:["amenity/bicycle_rental","amenity/boat_rental","amenity/car_rental","amenity/truck_rental","amenity/vehicle_rental","shop/rental"],school:["amenity/childcare","amenity/college","amenity/kindergarten","amenity/language_school","amenity/prep_school","amenity/school","amenity/university"],supermarket:["shop/food","shop/frozen_food","shop/greengrocer","shop/grocery","shop/supermarket","shop/wholesale"],variety_store:["shop/variety_store","shop/supermarket","shop/discount","shop/convenience"],vending:["amenity/vending_machine","shop/vending_machine"],wholesale:["shop/wholesale","shop/supermarket","shop/department_store"]};
-       var match_groups = {
-       matchGroups: matchGroups
-       };
+                   if (crossingToEdgeEndDistance - idealLengthMeters > minEdgeLengthMeters) {
+                     // the edge is long enough to insert a new node
+                     // the loc that would result in the full expected length
+                     var idealNodeLoc = locGetter(idealLengthMeters);
+                     newNode = osmNode();
+                     graph = actionAddMidpoint({
+                       loc: idealNodeLoc,
+                       edge: edge
+                     }, newNode)(graph);
+                   } else {
+                     var edgeCount = 0;
+                     endNode.parentIntersectionWays(graph).forEach(function (way) {
+                       way.nodes.forEach(function (nodeID) {
+                         if (nodeID === endNode.id) {
+                           if (endNode.id === way.first() && endNode.id !== way.last() || endNode.id === way.last() && endNode.id !== way.first()) {
+                             edgeCount += 1;
+                           } else {
+                             edgeCount += 2;
+                           }
+                         }
+                       });
+                     });

 
 

-       var match_groups$1 = /*#__PURE__*/Object.freeze({
-               __proto__: null,
-               matchGroups: matchGroups,
-               'default': match_groups
-       });
+                     if (edgeCount >= 3) {
+                       // the end node is a junction, try to leave a segment
+                       // between it and the structure - #7202
+                       var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;
+
+                       if (insetLength > minEdgeLengthMeters) {
+                         var insetNodeLoc = locGetter(insetLength);
+                         newNode = osmNode();
+                         graph = actionAddMidpoint({
+                           loc: insetNodeLoc,
+                           edge: edge
+                         }, newNode)(graph);
+                       }
+                     }
+                   } // if the edge is too short to subdivide as desired, then
+                   // just bound the structure at the existing end node

 
 

-       var require$$0 = getCjsExportFromNamespace(match_groups$1);

 
 

-       var matchGroups$1 = require$$0.matchGroups;
+                   if (!newNode) newNode = endNode;
+                   var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
+                   // do the split

 
 

+                   graph = splitAction(graph);

 
 

-       var matcher$1 = function () {
-         var _warnings = [];  // array of match conflict pairs
-         var _ambiguous = {};
-         var _matchIndex = {};
-         var matcher = {};
+                   if (splitAction.getCreatedWayIDs().length) {
+                     resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
+                   }

 
 

+                   return newNode;
+                 }

 
 

-         // Create an index of all the keys/simplenames for fast matching
-         matcher.buildMatchIndex = function (brands) {
-           // two passes - once for primary names, once for secondary/alternate names
-           Object.keys(brands).forEach(function (kvnd) { return insertNames(kvnd, 'primary'); });
-           Object.keys(brands).forEach(function (kvnd) { return insertNames(kvnd, 'secondary'); });
+                 var structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
+                 var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
+                 var structureWay = resultWayIDs.map(function (id) {
+                   return graph.entity(id);
+                 }).find(function (way) {
+                   return way.nodes.indexOf(structEndNode1.id) !== -1 && way.nodes.indexOf(structEndNode2.id) !== -1;
+                 });
+                 var tags = Object.assign({}, structureWay.tags); // copy tags

 
 

+                 if (bridgeOrTunnel === 'bridge') {
+                   tags.bridge = 'yes';
+                   tags.layer = '1';
+                 } else {
+                   var tunnelValue = 'yes';

 
 

-           function insertNames(kvnd, which) {
-             var obj = brands[kvnd];
-             var parts = to_parts(kvnd);
+                   if (getFeatureType(structureWay, graph) === 'waterway') {
+                     // use `tunnel=culvert` for waterways by default
+                     tunnelValue = 'culvert';
+                   }

 
 

-             // Exit early for ambiguous names in the second pass.
-             // They were collected in the first pass and we don't gather alt names for them.
-             if (which === 'secondary' && parts.d) { return; }
+                   tags.tunnel = tunnelValue;
+                   tags.layer = '-1';
+                 } // apply the structure tags to the way

 
 
 
 

-             if (obj.countryCodes) {
-               parts.countryCodes = obj.countryCodes.slice();  // copy
-             }
+                 graph = actionChangeTags(structureWay.id, tags)(graph);
+                 return graph;
+               };

 
 

-             var nomatches = (obj.nomatch || []);
-             if (nomatches.some(function (s) { return s === kvnd; })) {
-               console.log(("WARNING match/nomatch conflict for " + kvnd));
-               return;
+               context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
+               context.enter(modeSelect(context, resultWayIDs));

              }
              }

+           });
+         }

 
 

-             var match_kv = [parts.kv]
-               .concat(obj.matchTags || [])
-               .concat([((parts.k) + "/yes"), "building/yes"])   // #3454 - match some generic tags
-               .map(function (s) { return s.toLowerCase(); });
+         function makeConnectWaysFix(connectionTags) {
+           var fixTitleID = 'connect_features';

 
 

-             var match_nsimple = [];
-             if (which === 'primary') {
-               match_nsimple = [parts.n]
-                 .concat(obj.matchNames || [])
-                 .concat(obj.tags.official_name || [])   // #2732 - match alternate names
-                 .map(simplify);
+           if (connectionTags.ford) {
+             fixTitleID = 'connect_using_ford';
+           }

 
 

-             } else if (which === 'secondary') {
-               match_nsimple = []
-                 .concat(obj.tags.alt_name || [])        // #2732 - match alternate names
-                 .concat(obj.tags.short_name || [])      // #2732 - match alternate names
-                 .map(simplify);
-             }
+           return new validationIssueFix({
+             icon: 'iD-icon-crossing',
+             title: _t.html('issues.fix.' + fixTitleID + '.title'),
+             onClick: function onClick(context) {
+               var loc = this.issue.loc;
+               var connectionTags = this.issue.data.connectionTags;
+               var edges = this.issue.data.edges;
+               context.perform(function actionConnectCrossingWays(graph) {
+                 // create the new node for the points
+                 var node = osmNode({
+                   loc: loc,
+                   tags: connectionTags
+                 });
+                 graph = graph.replace(node);
+                 var nodesToMerge = [node.id];
+                 var mergeThresholdInMeters = 0.75;
+                 edges.forEach(function (edge) {
+                   var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+                   var nearby = geoSphericalClosestNode(edgeNodes, loc); // if there is already a suitable node nearby, use that
+                   // use the node if node has no interesting tags or if it is a crossing node #8326
+
+                   if ((!nearby.node.hasInterestingTags() || nearby.node.isCrossing()) && nearby.distance < mergeThresholdInMeters) {
+                     nodesToMerge.push(nearby.node.id); // else add the new node to the way
+                   } else {
+                     graph = actionAddMidpoint({
+                       loc: loc,
+                       edge: edge
+                     }, node)(graph);
+                   }
+                 });

 
 

-             if (!match_nsimple.length) { return; }  // nothing to do
+                 if (nodesToMerge.length > 1) {
+                   // if we're using nearby nodes, merge them with the new node
+                   graph = actionMergeNodes(nodesToMerge, loc)(graph);
+                 }

 
 

-             match_kv.forEach(function (kv) {
-               match_nsimple.forEach(function (nsimple) {
-                 if (parts.d) {
-                   // Known ambiguous names with disambiguation string ~(USA) / ~(Canada)
-                   // FIXME: Name collisions will overwrite the initial entry (ok for now)
-                   if (!_ambiguous[kv]) { _ambiguous[kv] = {}; }
-                   _ambiguous[kv][nsimple] = parts;
+                 return graph;
+               }, _t('issues.fix.connect_crossing_features.annotation'));
+             }
+           });
+         }

 
 

+         function makeChangeLayerFix(higherOrLower) {
+           return new validationIssueFix({
+             icon: 'iD-icon-' + (higherOrLower === 'higher' ? 'up' : 'down'),
+             title: _t.html('issues.fix.tag_this_as_' + higherOrLower + '.title'),
+             onClick: function onClick(context) {
+               var mode = context.mode();
+               if (!mode || mode.id !== 'select') return;
+               var selectedIDs = mode.selectedIDs();
+               if (selectedIDs.length !== 1) return;
+               var selectedID = selectedIDs[0];
+               if (!this.issue.entityIds.some(function (entityId) {
+                 return entityId === selectedID;
+               })) return;
+               var entity = context.hasEntity(selectedID);
+               if (!entity) return;
+               var tags = Object.assign({}, entity.tags); // shallow copy
+
+               var layer = tags.layer && Number(tags.layer);
+
+               if (layer && !isNaN(layer)) {
+                 if (higherOrLower === 'higher') {
+                   layer += 1;

                  } else {
                  } else {

-                   // Names we mostly expect to be unique..
-                   if (!_matchIndex[kv]) { _matchIndex[kv] = {}; }
-
-                   var m = _matchIndex[kv][nsimple];
-                   if (m) {  // There already is a match for this name, skip it
-                     // Warn if we detect collisions in a primary name.
-                     // Skip warning if a secondary name or a generic `*=yes` tag - #2972 / #3454
-                     if (which === 'primary' && !/\/yes$/.test(kv)) {
-                       _warnings.push([m.kvnd, (kvnd + " (" + kv + "/" + nsimple + ")")]);
-                     }
-                   } else {
-                     _matchIndex[kv][nsimple] = parts;   // insert
-                   }
+                   layer -= 1;

                  }
                  }

-               });
-             });
+               } else {
+                 if (higherOrLower === 'higher') {
+                   layer = 1;
+                 } else {
+                   layer = -1;
+                 }
+               }

 
 

-           }
-         };
+               tags.layer = layer.toString();
+               context.perform(actionChangeTags(entity.id, tags), _t('operations.change_tags.annotation'));
+             }
+           });
+         }

 
 

+         validation.type = type;
+         return validation;
+       }

 
 

-         // pass a `key`, `value`, `name` and return the best match,
-         // `countryCode` optional (if supplied, must match that too)
-         matcher.matchKVN = function (key, value, name, countryCode) {
-           return matcher.matchParts(to_parts((key + "/" + value + "|" + name)), countryCode);
-         };
+       function behaviorDrawWay(context, wayID, mode, startGraph) {
+         var keybinding = utilKeybinding('drawWay');
+         var dispatch = dispatch$8('rejectedSelfIntersection');
+         var behavior = behaviorDraw(context); // Must be set by `drawWay.nodeIndex` before each install of this behavior.

 
 

+         var _nodeIndex;

 
 

-         // pass a parts object and return the best match,
-         // `countryCode` optional (if supplied, must match that too)
-         matcher.matchParts = function (parts, countryCode) {
-           var match = null;
-           var inGroup = false;
+         var _origWay;

 
 

-           // fixme: we currently return a single match for ambiguous
-           match = _ambiguous[parts.kv] && _ambiguous[parts.kv][parts.nsimple];
-           if (match && matchesCountryCode(match)) { return match; }
+         var _wayGeometry;

 
 

-           // try to return an exact match
-           match = _matchIndex[parts.kv] && _matchIndex[parts.kv][parts.nsimple];
-           if (match && matchesCountryCode(match)) { return match; }
+         var _headNodeID;

 
 

-           // look in match groups
-           for (var mg in matchGroups$1) {
-             var matchGroup = matchGroups$1[mg];
-             match = null;
-             inGroup = false;
+         var _annotation;

 
 

-             for (var i = 0; i < matchGroup.length; i++) {
-               var otherkv = matchGroup[i].toLowerCase();
-               if (!inGroup) {
-                 inGroup = otherkv === parts.kv;
-               }
-               if (!match) {
-                 // fixme: we currently return a single match for ambiguous
-                 match = _ambiguous[otherkv] && _ambiguous[otherkv][parts.nsimple];
-               }
-               if (!match) {
-                 match = _matchIndex[otherkv] && _matchIndex[otherkv][parts.nsimple];
-               }
+         var _pointerHasMoved = false; // The osmNode to be placed.
+         // This is temporary and just follows the mouse cursor until an "add" event occurs.

 
 

-               if (match && !matchesCountryCode(match)) {
-                 match = null;
-               }
+         var _drawNode;

 
 

-               if (inGroup && match) {
-                 return match;
-               }
+         var _didResolveTempEdit = false;
+
+         function createDrawNode(loc) {
+           // don't make the draw node until we actually need it
+           _drawNode = osmNode({
+             loc: loc
+           });
+           context.pauseChangeDispatch();
+           context.replace(function actionAddDrawNode(graph) {
+             // add the draw node to the graph and insert it into the way
+             var way = graph.entity(wayID);
+             return graph.replace(_drawNode).replace(way.addNode(_drawNode.id, _nodeIndex));
+           }, _annotation);
+           context.resumeChangeDispatch();
+           setActiveElements();
+         }
+
+         function removeDrawNode() {
+           context.pauseChangeDispatch();
+           context.replace(function actionDeleteDrawNode(graph) {
+             var way = graph.entity(wayID);
+             return graph.replace(way.removeNode(_drawNode.id)).remove(_drawNode);
+           }, _annotation);
+           _drawNode = undefined;
+           context.resumeChangeDispatch();
+         }
+
+         function keydown(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope')) {
+               context.surface().classed('nope-suppressed', true);

              }
              }

+
+             context.surface().classed('nope', false).classed('nope-disabled', true);

            }
            }

+         }

 
 

-           return null;
+         function keyup(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope-suppressed')) {
+               context.surface().classed('nope', true);
+             }

 
 

-           function matchesCountryCode(match) {
-             if (!countryCode) { return true; }
-             if (!match.countryCodes) { return true; }
-             return match.countryCodes.indexOf(countryCode) !== -1;
+             context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);

            }
            }

-         };
+         }

 
 

+         function allowsVertex(d) {
+           return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+         } // related code
+         // - `mode/drag_node.js`     `doMove()`
+         // - `behavior/draw.js`      `click()`
+         // - `behavior/draw_way.js`  `move()`

 
 

-         matcher.getWarnings = function () { return _warnings; };

 
 

-         return matcher;
-       };
+         function move(d3_event, datum) {
+           var loc = context.map().mouseCoordinates();
+           if (!_drawNode) createDrawNode(loc);
+           context.surface().classed('nope-disabled', d3_event.altKey);
+           var targetLoc = datum && datum.properties && datum.properties.entity && allowsVertex(datum.properties.entity) && datum.properties.entity.loc;
+           var targetNodes = datum && datum.properties && datum.properties.nodes;

 
 

-       var quickselect$1 = createCommonjsModule(function (module, exports) {
-       (function (global, factory) {
-                module.exports = factory() ;
-       }(commonjsGlobal, (function () {
-       function quickselect(arr, k, left, right, compare) {
-           quickselectStep(arr, k, left || 0, right || (arr.length - 1), compare || defaultCompare);
-       }
+           if (targetLoc) {
+             // snap to node/vertex - a point target with `.loc`
+             loc = targetLoc;
+           } else if (targetNodes) {
+             // snap to way - a line target with `.nodes`
+             var choice = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, _drawNode.id);

 
 

-       function quickselectStep(arr, k, left, right, compare) {
+             if (choice) {
+               loc = choice.loc;
+             }
+           }

 
 

-           while (right > left) {
-               if (right - left > 600) {
-                   var n = right - left + 1;
-                   var m = k - left + 1;
-                   var z = Math.log(n);
-                   var s = 0.5 * Math.exp(2 * z / 3);
-                   var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
-                   var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
-                   var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
-                   quickselectStep(arr, k, newLeft, newRight, compare);
-               }
+           context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
+           _drawNode = context.entity(_drawNode.id);
+           checkGeometry(true
+           /* includeDrawNode */
+           );
+         } // Check whether this edit causes the geometry to break.
+         // If so, class the surface with a nope cursor.
+         // `includeDrawNode` - Only check the relevant line segments if finishing drawing

 
 

-               var t = arr[k];
-               var i = left;
-               var j = right;

 
 

-               swap(arr, left, k);
-               if (compare(arr[right], t) > 0) { swap(arr, left, right); }
+         function checkGeometry(includeDrawNode) {
+           var nopeDisabled = context.surface().classed('nope-disabled');
+           var isInvalid = isInvalidGeometry(includeDrawNode);

 
 

-               while (i < j) {
-                   swap(arr, i, j);
-                   i++;
-                   j--;
-                   while (compare(arr[i], t) < 0) { i++; }
-                   while (compare(arr[j], t) > 0) { j--; }
-               }
+           if (nopeDisabled) {
+             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+           } else {
+             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+           }
+         }

 
 

-               if (compare(arr[left], t) === 0) { swap(arr, left, j); }
-               else {
-                   j++;
-                   swap(arr, j, right);
-               }
+         function isInvalidGeometry(includeDrawNode) {
+           var testNode = _drawNode; // we only need to test the single way we're drawing
+
+           var parentWay = context.graph().entity(wayID);
+           var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy

 
 

-               if (j <= k) { left = j + 1; }
-               if (k <= j) { right = j - 1; }
+           if (includeDrawNode) {
+             if (parentWay.isClosed()) {
+               // don't test the last segment for closed ways - #4655
+               // (still test the first segment)
+               nodes.pop();
+             }
+           } else {
+             // discount the draw node
+             if (parentWay.isClosed()) {
+               if (nodes.length < 3) return false;
+               if (_drawNode) nodes.splice(-2, 1);
+               testNode = nodes[nodes.length - 2];
+             } else {
+               // there's nothing we need to test if we ignore the draw node on open ways
+               return false;
+             }

            }
            }

-       }

 
 

-       function swap(arr, i, j) {
-           var tmp = arr[i];
-           arr[i] = arr[j];
-           arr[j] = tmp;
-       }
+           return testNode && geoHasSelfIntersections(nodes, testNode.id);
+         }

 
 

-       function defaultCompare(a, b) {
-           return a < b ? -1 : a > b ? 1 : 0;
-       }
+         function undone() {
+           // undoing removed the temp edit
+           _didResolveTempEdit = true;
+           context.pauseChangeDispatch();
+           var nextMode;

 
 

-       return quickselect;
+           if (context.graph() === startGraph) {
+             // We've undone back to the initial state before we started drawing.
+             // Just exit the draw mode without undoing whatever we did before
+             // we entered the draw mode.
+             nextMode = modeSelect(context, [wayID]);
+           } else {
+             // The `undo` only removed the temporary edit, so here we have to
+             // manually undo to actually remove the last node we added. We can't
+             // use the `undo` function since the initial "add" graph doesn't have
+             // an annotation and so cannot be undone to.
+             context.pop(1); // continue drawing

 
 

-       })));
-       });
+             nextMode = mode;
+           } // clear the redo stack by adding and removing a blank edit

 
 

-       var rbush_1 = rbush;
-       var _default$2 = rbush;

 
 

+           context.perform(actionNoop());
+           context.pop(1);
+           context.resumeChangeDispatch();
+           context.enter(nextMode);
+         }

 
 

+         function setActiveElements() {
+           if (!_drawNode) return;
+           context.surface().selectAll('.' + _drawNode.id).classed('active', true);
+         }

 
 

-       function rbush(maxEntries, format) {
-           if (!(this instanceof rbush)) { return new rbush(maxEntries, format); }
+         function resetToStartGraph() {
+           while (context.graph() !== startGraph) {
+             context.pop();
+           }
+         }

 
 

-           // max entries in a node is 9 by default; min node fill is 40% for best performance
-           this._maxEntries = Math.max(4, maxEntries || 9);
-           this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
+         var drawWay = function drawWay(surface) {
+           _drawNode = undefined;
+           _didResolveTempEdit = false;
+           _origWay = context.entity(wayID);

 
 

-           if (format) {
-               this._initFormat(format);
+           if (typeof _nodeIndex === 'number') {
+             _headNodeID = _origWay.nodes[_nodeIndex];
+           } else if (_origWay.isClosed()) {
+             _headNodeID = _origWay.nodes[_origWay.nodes.length - 2];
+           } else {
+             _headNodeID = _origWay.nodes[_origWay.nodes.length - 1];
+           }
+
+           _wayGeometry = _origWay.geometry(context.graph());
+           _annotation = _t((_origWay.nodes.length === (_origWay.isClosed() ? 2 : 1) ? 'operations.start.annotation.' : 'operations.continue.annotation.') + _wayGeometry);
+           _pointerHasMoved = false; // Push an annotated state for undo to return back to.
+           // We must make sure to replace or remove it later.
+
+           context.pauseChangeDispatch();
+           context.perform(actionNoop(), _annotation);
+           context.resumeChangeDispatch();
+           behavior.hover().initialNodeID(_headNodeID);
+           behavior.on('move', function () {
+             _pointerHasMoved = true;
+             move.apply(this, arguments);
+           }).on('down', function () {
+             move.apply(this, arguments);
+           }).on('downcancel', function () {
+             if (_drawNode) removeDrawNode();
+           }).on('click', drawWay.add).on('clickWay', drawWay.addWay).on('clickNode', drawWay.addNode).on('undo', context.undo).on('cancel', drawWay.cancel).on('finish', drawWay.finish);
+           select(window).on('keydown.drawWay', keydown).on('keyup.drawWay', keyup);
+           context.map().dblclickZoomEnable(false).on('drawn.draw', setActiveElements);
+           setActiveElements();
+           surface.call(behavior);
+           context.history().on('undone.draw', undone);
+         };
+
+         drawWay.off = function (surface) {
+           if (!_didResolveTempEdit) {
+             // Drawing was interrupted unexpectedly.
+             // This can happen if the user changes modes,
+             // clicks geolocate button, a hashchange event occurs, etc.
+             context.pauseChangeDispatch();
+             resetToStartGraph();
+             context.resumeChangeDispatch();
+           }
+
+           _drawNode = undefined;
+           _nodeIndex = undefined;
+           context.map().on('drawn.draw', null);
+           surface.call(behavior.off).selectAll('.active').classed('active', false);
+           surface.classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false);
+           select(window).on('keydown.drawWay', null).on('keyup.drawWay', null);
+           context.history().on('undone.draw', null);
+         };
+
+         function attemptAdd(d, loc, doAdd) {
+           if (_drawNode) {
+             // move the node to the final loc in case move wasn't called
+             // consistently (e.g. on touch devices)
+             context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
+             _drawNode = context.entity(_drawNode.id);
+           } else {
+             createDrawNode(loc);

            }
 
            }
 

-           this.clear();
-       }
+           checkGeometry(true
+           /* includeDrawNode */
+           );

 
 

-       rbush.prototype = {
+           if (d && d.properties && d.properties.nope || context.surface().classed('nope')) {
+             if (!_pointerHasMoved) {
+               // prevent the temporary draw node from appearing on touch devices
+               removeDrawNode();
+             }

 
 

-           all: function () {
-               return this._all(this.data, []);
-           },
+             dispatch.call('rejectedSelfIntersection', this);
+             return; // can't click here
+           }

 
 

-           search: function (bbox) {
+           context.pauseChangeDispatch();
+           doAdd(); // we just replaced the temporary edit with the real one

 
 

-               var node = this.data,
-                   result = [],
-                   toBBox = this.toBBox;
+           _didResolveTempEdit = true;
+           context.resumeChangeDispatch();
+           context.enter(mode);
+         } // Accept the current position of the drawing node

 
 

-               if (!intersects$1(bbox, node)) { return result; }

 
 

-               var nodesToSearch = [],
-                   i, len, child, childBBox;
+         drawWay.add = function (loc, d) {
+           attemptAdd(d, loc, function () {// don't need to do anything extra
+           });
+         }; // Connect the way to an existing way

 
 

-               while (node) {
-                   for (i = 0, len = node.children.length; i < len; i++) {

 
 

-                       child = node.children[i];
-                       childBBox = node.leaf ? toBBox(child) : child;
+         drawWay.addWay = function (loc, edge, d) {
+           attemptAdd(d, loc, function () {
+             context.replace(actionAddMidpoint({
+               loc: loc,
+               edge: edge
+             }, _drawNode), _annotation);
+           });
+         }; // Connect the way to an existing node

 
 

-                       if (intersects$1(bbox, childBBox)) {
-                           if (node.leaf) { result.push(child); }
-                           else if (contains$2(bbox, childBBox)) { this._all(child, result); }
-                           else { nodesToSearch.push(child); }
-                       }
-                   }
-                   node = nodesToSearch.pop();
-               }

 
 

-               return result;
-           },
+         drawWay.addNode = function (node, d) {
+           // finish drawing if the mapper targets the prior node
+           if (node.id === _headNodeID || // or the first node when drawing an area
+           _origWay.isClosed() && node.id === _origWay.first()) {
+             drawWay.finish();
+             return;
+           }

 
 

-           collides: function (bbox) {
+           attemptAdd(d, node.loc, function () {
+             context.replace(function actionReplaceDrawNode(graph) {
+               // remove the temporary draw node and insert the existing node
+               // at the same index
+               graph = graph.replace(graph.entity(wayID).removeNode(_drawNode.id)).remove(_drawNode);
+               return graph.replace(graph.entity(wayID).addNode(node.id, _nodeIndex));
+             }, _annotation);
+           });
+         };
+         /**
+          * @param {(typeof osmWay)[]} ways
+          * @returns {"line" | "area" | "generic"}
+          */

 
 

-               var node = this.data,
-                   toBBox = this.toBBox;

 
 

-               if (!intersects$1(bbox, node)) { return false; }
+         function getFeatureType(ways) {
+           if (ways.every(function (way) {
+             return way.isClosed();
+           })) return 'area';
+           if (ways.every(function (way) {
+             return !way.isClosed();
+           })) return 'line';
+           return 'generic';
+         }
+         /** see PR #8671 */

 
 

-               var nodesToSearch = [],
-                   i, len, child, childBBox;

 
 

-               while (node) {
-                   for (i = 0, len = node.children.length; i < len; i++) {
+         function followMode() {
+           if (_didResolveTempEdit) return;

 
 

-                       child = node.children[i];
-                       childBBox = node.leaf ? toBBox(child) : child;
+           try {
+             // get the last 2 added nodes.
+             // check if they are both part of only oneway (the same one)
+             // check if the ways that they're part of are the same way
+             // find index of the last two nodes, to determine the direction to travel around the existing way
+             // add the next node to the way we are drawing
+             // if we're drawing an area, the first node = last node.
+             var isDrawingArea = _origWay.nodes[0] === _origWay.nodes.slice(-1)[0];

 
 

-                       if (intersects$1(bbox, childBBox)) {
-                           if (node.leaf || contains$2(bbox, childBBox)) { return true; }
-                           nodesToSearch.push(child);
-                       }
-                   }
-                   node = nodesToSearch.pop();
-               }
+             var _origWay$nodes$slice = _origWay.nodes.slice(isDrawingArea ? -3 : -2),
+                 _origWay$nodes$slice2 = _slicedToArray(_origWay$nodes$slice, 2),
+                 secondLastNodeId = _origWay$nodes$slice2[0],
+                 lastNodeId = _origWay$nodes$slice2[1]; // Unlike startGraph, the full history graph may contain unsaved vertices to follow.
+             // https://github.com/openstreetmap/iD/issues/8749

 
 

-               return false;
-           },

 
 

-           load: function (data) {
-               if (!(data && data.length)) { return this; }
+             var historyGraph = context.history().graph();

 
 

-               if (data.length < this._minEntries) {
-                   for (var i = 0, len = data.length; i < len; i++) {
-                       this.insert(data[i]);
-                   }
-                   return this;
-               }
+             if (!lastNodeId || !secondLastNodeId || !historyGraph.hasEntity(lastNodeId) || !historyGraph.hasEntity(secondLastNodeId)) {
+               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('operations.follow.error.needs_more_initial_nodes'))();
+               return;
+             } // If the way has looped over itself, follow some other way.

 
 

-               // recursively build the tree with the given data from scratch using OMT algorithm
-               var node = this._build(data.slice(), 0, data.length - 1, 0);

 
 

-               if (!this.data.children.length) {
-                   // save as is if tree is empty
-                   this.data = node;
+             var lastNodesParents = historyGraph.parentWays(historyGraph.entity(lastNodeId)).filter(function (w) {
+               return w.id !== wayID;
+             });
+             var secondLastNodesParents = historyGraph.parentWays(historyGraph.entity(secondLastNodeId)).filter(function (w) {
+               return w.id !== wayID;
+             });
+             var featureType = getFeatureType(lastNodesParents);

 
 

-               } else if (this.data.height === node.height) {
-                   // split root if trees have the same height
-                   this._splitRoot(this.data, node);
+             if (lastNodesParents.length !== 1 || secondLastNodesParents.length === 0) {
+               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t("operations.follow.error.intersection_of_multiple_ways.".concat(featureType)))();
+               return;
+             } // Check if the last node's parent is also the parent of the second last node.
+             // The last node must only have one parent, but the second last node can have
+             // multiple parents.

 
 

-               } else {
-                   if (this.data.height < node.height) {
-                       // swap trees if inserted one is bigger
-                       var tmpNode = this.data;
-                       this.data = node;
-                       node = tmpNode;
-                   }

 
 

-                   // insert the small tree into the large tree at appropriate level
-                   this._insert(node, this.data.height - node.height - 1, true);
+             if (!secondLastNodesParents.some(function (n) {
+               return n.id === lastNodesParents[0].id;
+             })) {
+               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t("operations.follow.error.intersection_of_different_ways.".concat(featureType)))();
+               return;
+             }
+
+             var way = lastNodesParents[0];
+             var indexOfLast = way.nodes.indexOf(lastNodeId);
+             var indexOfSecondLast = way.nodes.indexOf(secondLastNodeId); // for a closed way, the first/last node is the same so it appears twice in the array,
+             // but indexOf always finds the first occurrence. This is only an issue when following a way
+             // in descending order
+
+             var isDescendingPastZero = indexOfLast === way.nodes.length - 2 && indexOfSecondLast === 0;
+             var nextNodeIndex = indexOfLast + (indexOfLast > indexOfSecondLast && !isDescendingPastZero ? 1 : -1); // if we're following a closed way and we pass the first/last node, the  next index will be -1
+
+             if (nextNodeIndex === -1) nextNodeIndex = indexOfSecondLast === 1 ? way.nodes.length - 2 : 1;
+             var nextNode = historyGraph.entity(way.nodes[nextNodeIndex]);
+             drawWay.addNode(nextNode, {
+               geometry: {
+                 type: 'Point',
+                 coordinates: nextNode.loc
+               },
+               id: nextNode.id,
+               properties: {
+                 target: true,
+                 entity: nextNode

                }
                }

+             });
+           } catch (ex) {
+             context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('operations.follow.error.unknown'))();
+           }
+         }

 
 

-               return this;
-           },
+         keybinding.on(_t('operations.follow.key'), followMode);
+         select(document).call(keybinding); // Finish the draw operation, removing the temporary edit.
+         // If the way has enough nodes to be valid, it's selected.
+         // Otherwise, delete everything and return to browse mode.

 
 

-           insert: function (item) {
-               if (item) { this._insert(item, this.data.height - 1); }
-               return this;
-           },
+         drawWay.finish = function () {
+           checkGeometry(false
+           /* includeDrawNode */
+           );

 
 

-           clear: function () {
-               this.data = createNode$1([]);
-               return this;
-           },
+           if (context.surface().classed('nope')) {
+             dispatch.call('rejectedSelfIntersection', this);
+             return; // can't click here
+           }

 
 

-           remove: function (item, equalsFn) {
-               if (!item) { return this; }
+           context.pauseChangeDispatch(); // remove the temporary edit

 
 

-               var node = this.data,
-                   bbox = this.toBBox(item),
-                   path = [],
-                   indexes = [],
-                   i, parent, index, goingUp;
+           context.pop(1);
+           _didResolveTempEdit = true;
+           context.resumeChangeDispatch();
+           var way = context.hasEntity(wayID);

 
 

-               // depth-first iterative tree traversal
-               while (node || path.length) {
+           if (!way || way.isDegenerate()) {
+             drawWay.cancel();
+             return;
+           }

 
 

-                   if (!node) { // go up
-                       node = path.pop();
-                       parent = path[path.length - 1];
-                       i = indexes.pop();
-                       goingUp = true;
-                   }
+           window.setTimeout(function () {
+             context.map().dblclickZoomEnable(true);
+           }, 1000);
+           var isNewFeature = !mode.isContinuing;
+           context.enter(modeSelect(context, [wayID]).newFeature(isNewFeature));
+         }; // Cancel the draw operation, delete everything, and return to browse mode.

 
 

-                   if (node.leaf) { // check current node
-                       index = findItem$1(item, node.children, equalsFn);

 
 

-                       if (index !== -1) {
-                           // item found, remove the item and condense tree upwards
-                           node.children.splice(index, 1);
-                           path.push(node);
-                           this._condense(path);
-                           return this;
-                       }
-                   }
+         drawWay.cancel = function () {
+           context.pauseChangeDispatch();
+           resetToStartGraph();
+           context.resumeChangeDispatch();
+           window.setTimeout(function () {
+             context.map().dblclickZoomEnable(true);
+           }, 1000);
+           context.surface().classed('nope', false).classed('nope-disabled', false).classed('nope-suppressed', false);
+           context.enter(modeBrowse(context));
+         };

 
 

-                   if (!goingUp && !node.leaf && contains$2(node, bbox)) { // go down
-                       path.push(node);
-                       indexes.push(i);
-                       i = 0;
-                       parent = node;
-                       node = node.children[0];
+         drawWay.nodeIndex = function (val) {
+           if (!arguments.length) return _nodeIndex;
+           _nodeIndex = val;
+           return drawWay;
+         };

 
 

-                   } else if (parent) { // go right
-                       i++;
-                       node = parent.children[i];
-                       goingUp = false;
+         drawWay.activeID = function () {
+           if (!arguments.length) return _drawNode && _drawNode.id; // no assign

 
 

-                   } else { node = null; } // nothing found
-               }
+           return drawWay;
+         };

 
 

-               return this;
-           },
+         return utilRebind(drawWay, dispatch, 'on');
+       }

 
 

-           toBBox: function (item) { return item; },
+       function modeDrawLine(context, wayID, startGraph, button, affix, continuing) {
+         var mode = {
+           button: button,
+           id: 'draw-line'
+         };
+         var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawLine', function () {
+           context.ui().flash.iconName('#iD-icon-no').label(_t('self_intersection.error.lines'))();
+         });
+         mode.wayID = wayID;
+         mode.isContinuing = continuing;

 
 

-           compareMinX: compareNodeMinX$1,
-           compareMinY: compareNodeMinY$1,
+         mode.enter = function () {
+           behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
+           context.install(behavior);
+         };

 
 

-           toJSON: function () { return this.data; },
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };

 
 

-           fromJSON: function (data) {
-               this.data = data;
-               return this;
-           },
+         mode.selectedIDs = function () {
+           return [wayID];
+         };

 
 

-           _all: function (node, result) {
-               var nodesToSearch = [];
-               while (node) {
-                   if (node.leaf) { result.push.apply(result, node.children); }
-                   else { nodesToSearch.push.apply(nodesToSearch, node.children); }
+         mode.activeID = function () {
+           return behavior && behavior.activeID() || [];
+         };

 
 

-                   node = nodesToSearch.pop();
-               }
-               return result;
-           },
+         return mode;
+       }

 
 

-           _build: function (items, left, right, height) {
+       function validationDisconnectedWay() {
+         var type = 'disconnected_way';

 
 

-               var N = right - left + 1,
-                   M = this._maxEntries,
-                   node;
+         function isTaggedAsHighway(entity) {
+           return osmRoutableHighwayTagValues[entity.tags.highway];
+         }

 
 

-               if (N <= M) {
-                   // reached leaf level; return leaf
-                   node = createNode$1(items.slice(left, right + 1));
-                   calcBBox$1(node, this.toBBox);
-                   return node;
-               }
+         var validation = function checkDisconnectedWay(entity, graph) {
+           var routingIslandWays = routingIslandForEntity(entity);
+           if (!routingIslandWays) return [];
+           return [new validationIssue({
+             type: type,
+             subtype: 'highway',
+             severity: 'warning',
+             message: function message(context) {
+               var entity = this.entityIds.length && context.hasEntity(this.entityIds[0]);
+               var label = entity && utilDisplayLabel(entity, context.graph());
+               return _t.html('issues.disconnected_way.routable.message', {
+                 count: this.entityIds.length,
+                 highway: label
+               });
+             },
+             reference: showReference,
+             entityIds: Array.from(routingIslandWays).map(function (way) {
+               return way.id;
+             }),
+             dynamicFixes: makeFixes
+           })];

 
 

-               if (!height) {
-                   // target height of the bulk-loaded tree
-                   height = Math.ceil(Math.log(N) / Math.log(M));
+           function makeFixes(context) {
+             var fixes = [];
+             var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);

 
 

-                   // target number of root entries to maximize storage utilization
-                   M = Math.ceil(N / Math.pow(M, height - 1));
+             if (singleEntity) {
+               if (singleEntity.type === 'way' && !singleEntity.isClosed()) {
+                 var textDirection = _mainLocalizer.textDirection();
+                 var startFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.first(), 'start');
+                 if (startFix) fixes.push(startFix);
+                 var endFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.last(), 'end');
+                 if (endFix) fixes.push(endFix);

                }
 
                }
 

-               node = createNode$1([]);
-               node.leaf = false;
-               node.height = height;
+               if (!fixes.length) {
+                 fixes.push(new validationIssueFix({
+                   title: _t.html('issues.fix.connect_feature.title')
+                 }));
+               }

 
 

-               // split the items into M mostly square tiles
+               fixes.push(new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.delete_feature.title'),
+                 entityIds: [singleEntity.id],
+                 onClick: function onClick(context) {
+                   var id = this.issue.entityIds[0];
+                   var operation = operationDelete(context, [id]);

 
 

-               var N2 = Math.ceil(N / M),
-                   N1 = N2 * Math.ceil(Math.sqrt(M)),
-                   i, j, right2, right3;
+                   if (!operation.disabled()) {
+                     operation();
+                   }
+                 }
+               }));
+             } else {
+               fixes.push(new validationIssueFix({
+                 title: _t.html('issues.fix.connect_features.title')
+               }));
+             }

 
 

-               multiSelect$1(items, left, right, N1, this.compareMinX);
+             return fixes;
+           }

 
 

-               for (i = left; i <= right; i += N1) {
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.disconnected_way.routable.reference'));
+           }

 
 

-                   right2 = Math.min(i + N1 - 1, right);
+           function routingIslandForEntity(entity) {
+             var routingIsland = new Set(); // the interconnected routable features

 
 

-                   multiSelect$1(items, i, right2, N2, this.compareMinY);
+             var waysToCheck = []; // the queue of remaining routable ways to traverse

 
 

-                   for (j = i; j <= right2; j += N2) {
+             function queueParentWays(node) {
+               graph.parentWays(node).forEach(function (parentWay) {
+                 if (!routingIsland.has(parentWay) && // only check each feature once
+                 isRoutableWay(parentWay, false)) {
+                   // only check routable features
+                   routingIsland.add(parentWay);
+                   waysToCheck.push(parentWay);
+                 }
+               });
+             }

 
 

-                       right3 = Math.min(j + N2 - 1, right2);
+             if (entity.type === 'way' && isRoutableWay(entity, true)) {
+               routingIsland.add(entity);
+               waysToCheck.push(entity);
+             } else if (entity.type === 'node' && isRoutableNode(entity)) {
+               routingIsland.add(entity);
+               queueParentWays(entity);
+             } else {
+               // this feature isn't routable, cannot be a routing island
+               return null;
+             }

 
 

-                       // pack each entry recursively
-                       node.children.push(this._build(items, j, right3, height - 1));
-                   }
-               }
+             while (waysToCheck.length) {
+               var wayToCheck = waysToCheck.pop();
+               var childNodes = graph.childNodes(wayToCheck);

 
 

-               calcBBox$1(node, this.toBBox);
+               for (var i in childNodes) {
+                 var vertex = childNodes[i];

 
 

-               return node;
-           },
+                 if (isConnectedVertex(vertex)) {
+                   // found a link to the wider network, not a routing island
+                   return null;
+                 }

 
 

-           _chooseSubtree: function (bbox, node, level, path) {
+                 if (isRoutableNode(vertex)) {
+                   routingIsland.add(vertex);
+                 }

 
 

-               var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
+                 queueParentWays(vertex);
+               }
+             } // no network link found, this is a routing island, return its members

 
 

-               while (true) {
-                   path.push(node);

 
 

-                   if (node.leaf || path.length - 1 === level) { break; }
+             return routingIsland;
+           }

 
 

-                   minArea = minEnlargement = Infinity;
+           function isConnectedVertex(vertex) {
+             // assume ways overlapping unloaded tiles are connected to the wider road network  - #5938
+             var osm = services.osm;
+             if (osm && !osm.isDataLoaded(vertex.loc)) return true; // entrances are considered connected

 
 

-                   for (i = 0, len = node.children.length; i < len; i++) {
-                       child = node.children[i];
-                       area = bboxArea$1(child);
-                       enlargement = enlargedArea$1(bbox, child) - area;
+             if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
+             if (vertex.tags.amenity === 'parking_entrance') return true;
+             return false;
+           }

 
 

-                       // choose entry with the least area enlargement
-                       if (enlargement < minEnlargement) {
-                           minEnlargement = enlargement;
-                           minArea = area < minArea ? area : minArea;
-                           targetNode = child;
+           function isRoutableNode(node) {
+             // treat elevators as distinct features in the highway network
+             if (node.tags.highway === 'elevator') return true;
+             return false;
+           }

 
 

-                       } else if (enlargement === minEnlargement) {
-                           // otherwise choose one with the smallest area
-                           if (area < minArea) {
-                               minArea = area;
-                               targetNode = child;
-                           }
-                       }
-                   }
+           function isRoutableWay(way, ignoreInnerWays) {
+             if (isTaggedAsHighway(way) || way.tags.route === 'ferry') return true;
+             return graph.parentRelations(way).some(function (parentRelation) {
+               if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true;
+               if (parentRelation.isMultipolygon() && isTaggedAsHighway(parentRelation) && (!ignoreInnerWays || parentRelation.memberById(way.id).role !== 'inner')) return true;
+               return false;
+             });
+           }

 
 

-                   node = targetNode || node.children[0];
+           function makeContinueDrawingFixIfAllowed(textDirection, vertexID, whichEnd) {
+             var vertex = graph.hasEntity(vertexID);
+             if (!vertex || vertex.tags.noexit === 'yes') return null;
+             var useLeftContinue = whichEnd === 'start' && textDirection === 'ltr' || whichEnd === 'end' && textDirection === 'rtl';
+             return new validationIssueFix({
+               icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
+               title: _t.html('issues.fix.continue_from_' + whichEnd + '.title'),
+               entityIds: [vertexID],
+               onClick: function onClick(context) {
+                 var wayId = this.issue.entityIds[0];
+                 var way = context.hasEntity(wayId);
+                 var vertexId = this.entityIds[0];
+                 var vertex = context.hasEntity(vertexId);
+                 if (!way || !vertex) return; // make sure the vertex is actually visible and editable
+
+                 var map = context.map();
+
+                 if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+                   map.zoomToEase(vertex);
+                 }
+
+                 context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));

                }
                }

+             });
+           }
+         };

 
 

-               return node;
-           },
+         validation.type = type;
+         return validation;
+       }
+
+       function validationFormatting() {
+         var type = 'invalid_format';

 
 

-           _insert: function (item, level, isNode) {
+         var validation = function validation(entity) {
+           var issues = [];

 
 

-               var toBBox = this.toBBox,
-                   bbox = isNode ? item : toBBox(item),
-                   insertPath = [];
+           function isValidEmail(email) {
+             // Emails in OSM are going to be official so they should be pretty simple
+             // Using negated lists to better support all possible unicode characters (#6494)
+             var valid_email = /^[^\(\)\\,":;<>@\[\]]+@[^\(\)\\,":;<>@\[\]\.]+(?:\.[a-z0-9-]+)*$/i; // An empty value is also acceptable

 
 

-               // find the best node for accommodating the item, saving all nodes along the path too
-               var node = this._chooseSubtree(bbox, this.data, level, insertPath);
+             return !email || valid_email.test(email);
+           }
+           /*
+           function isSchemePresent(url) {
+               var valid_scheme = /^https?:\/\//i;
+               return (!url || valid_scheme.test(url));
+           }
+           */

 
 

-               // put the item into the node
-               node.children.push(item);
-               extend$3(node, bbox);

 
 

-               // split on node overflow; propagate upwards if necessary
-               while (level >= 0) {
-                   if (insertPath[level].children.length > this._maxEntries) {
-                       this._split(insertPath, level);
-                       level--;
-                   } else { break; }
+           function showReferenceEmail(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.invalid_format.email.reference'));
+           }
+           /*
+           function showReferenceWebsite(selection) {
+               selection.selectAll('.issue-reference')
+                   .data([0])
+                   .enter()
+                   .append('div')
+                   .attr('class', 'issue-reference')
+                   .html(t.html('issues.invalid_format.website.reference'));
+           }
+            if (entity.tags.website) {
+               // Multiple websites are possible
+               // If ever we support ES6, arrow functions make this nicer
+               var websites = entity.tags.website
+                   .split(';')
+                   .map(function(s) { return s.trim(); })
+                   .filter(function(x) { return !isSchemePresent(x); });
+                if (websites.length) {
+                   issues.push(new validationIssue({
+                       type: type,
+                       subtype: 'website',
+                       severity: 'warning',
+                       message: function(context) {
+                           var entity = context.hasEntity(this.entityIds[0]);
+                           return entity ? t.html('issues.invalid_format.website.message' + this.data,
+                               { feature: utilDisplayLabel(entity, context.graph()), site: websites.join(', ') }) : '';
+                       },
+                       reference: showReferenceWebsite,
+                       entityIds: [entity.id],
+                       hash: websites.join(),
+                       data: (websites.length > 1) ? '_multi' : ''
+                   }));

                }
                }

+           }
+           */

 
 

-               // adjust bboxes along the insertion path
-               this._adjustParentBBoxes(bbox, insertPath, level);
-           },
-
-           // split overflowed node into two
-           _split: function (insertPath, level) {

 
 

-               var node = insertPath[level],
-                   M = node.children.length,
-                   m = this._minEntries;
+           if (entity.tags.email) {
+             // Multiple emails are possible
+             var emails = entity.tags.email.split(';').map(function (s) {
+               return s.trim();
+             }).filter(function (x) {
+               return !isValidEmail(x);
+             });

 
 

-               this._chooseSplitAxis(node, m, M);
+             if (emails.length) {
+               issues.push(new validationIssue({
+                 type: type,
+                 subtype: 'email',
+                 severity: 'warning',
+                 message: function message(context) {
+                   var entity = context.hasEntity(this.entityIds[0]);
+                   return entity ? _t.html('issues.invalid_format.email.message' + this.data, {
+                     feature: utilDisplayLabel(entity, context.graph()),
+                     email: emails.join(', ')
+                   }) : '';
+                 },
+                 reference: showReferenceEmail,
+                 entityIds: [entity.id],
+                 hash: emails.join(),
+                 data: emails.length > 1 ? '_multi' : ''
+               }));
+             }
+           }

 
 

-               var splitIndex = this._chooseSplitIndex(node, m, M);
+           return issues;
+         };

 
 

-               var newNode = createNode$1(node.children.splice(splitIndex, node.children.length - splitIndex));
-               newNode.height = node.height;
-               newNode.leaf = node.leaf;
+         validation.type = type;
+         return validation;
+       }

 
 

-               calcBBox$1(node, this.toBBox);
-               calcBBox$1(newNode, this.toBBox);
+       function validationHelpRequest(context) {
+         var type = 'help_request';

 
 

-               if (level) { insertPath[level - 1].children.push(newNode); }
-               else { this._splitRoot(node, newNode); }
-           },
+         var validation = function checkFixmeTag(entity) {
+           if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user

 
 

-           _splitRoot: function (node, newNode) {
-               // split root node
-               this.data = createNode$1([node, newNode]);
-               this.data.height = node.height + 1;
-               this.data.leaf = false;
-               calcBBox$1(this.data, this.toBBox);
-           },
+           if (entity.version === undefined) return [];

 
 

-           _chooseSplitIndex: function (node, m, M) {
+           if (entity.v !== undefined) {
+             var baseEntity = context.history().base().hasEntity(entity.id); // don't flag fixmes added by the user on existing features

 
 

-               var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;
+             if (!baseEntity || !baseEntity.tags.fixme) return [];
+           }

 
 

-               minOverlap = minArea = Infinity;
+           return [new validationIssue({
+             type: type,
+             subtype: 'fixme_tag',
+             severity: 'warning',
+             message: function message(context) {
+               var entity = context.hasEntity(this.entityIds[0]);
+               return entity ? _t.html('issues.fixme_tag.message', {
+                 feature: utilDisplayLabel(entity, context.graph(), true
+                 /* verbose */
+                 )
+               }) : '';
+             },
+             dynamicFixes: function dynamicFixes() {
+               return [new validationIssueFix({
+                 title: _t.html('issues.fix.address_the_concern.title')
+               })];
+             },
+             reference: showReference,
+             entityIds: [entity.id]
+           })];

 
 

-               for (i = m; i <= M - m; i++) {
-                   bbox1 = distBBox$1(node, 0, i, this.toBBox);
-                   bbox2 = distBBox$1(node, i, M, this.toBBox);
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.fixme_tag.reference'));
+           }
+         };

 
 

-                   overlap = intersectionArea$1(bbox1, bbox2);
-                   area = bboxArea$1(bbox1) + bboxArea$1(bbox2);
+         validation.type = type;
+         return validation;
+       }

 
 

-                   // choose distribution with minimum overlap
-                   if (overlap < minOverlap) {
-                       minOverlap = overlap;
-                       index = i;
+       function validationImpossibleOneway() {
+         var type = 'impossible_oneway';
+
+         var validation = function checkImpossibleOneway(entity, graph) {
+           if (entity.type !== 'way' || entity.geometry(graph) !== 'line') return [];
+           if (entity.isClosed()) return [];
+           if (!typeForWay(entity)) return [];
+           if (!isOneway(entity)) return [];
+           var firstIssues = issuesForNode(entity, entity.first());
+           var lastIssues = issuesForNode(entity, entity.last());
+           return firstIssues.concat(lastIssues);
+
+           function typeForWay(way) {
+             if (way.geometry(graph) !== 'line') return null;
+             if (osmRoutableHighwayTagValues[way.tags.highway]) return 'highway';
+             if (osmFlowingWaterwayTagValues[way.tags.waterway]) return 'waterway';
+             return null;
+           }

 
 

-                       minArea = area < minArea ? area : minArea;
+           function isOneway(way) {
+             if (way.tags.oneway === 'yes') return true;
+             if (way.tags.oneway) return false;

 
 

-                   } else if (overlap === minOverlap) {
-                       // otherwise choose distribution with minimum area
-                       if (area < minArea) {
-                           minArea = area;
-                           index = i;
-                       }
-                   }
+             for (var key in way.tags) {
+               if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
+                 return true;

                }
                }

+             }

 
 

-               return index;
-           },
-
-           // sorts node children by the best axis for split
-           _chooseSplitAxis: function (node, m, M) {
-
-               var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX$1,
-                   compareMinY = node.leaf ? this.compareMinY : compareNodeMinY$1,
-                   xMargin = this._allDistMargin(node, m, M, compareMinX),
-                   yMargin = this._allDistMargin(node, m, M, compareMinY);
+             return false;
+           }

 
 

-               // if total distributions margin value is minimal for x, sort by minX,
-               // otherwise it's already sorted by minY
-               if (xMargin < yMargin) { node.children.sort(compareMinX); }
-           },
+           function nodeOccursMoreThanOnce(way, nodeID) {
+             var occurrences = 0;

 
 

-           // total margin of all possible split distributions where each node is at least m full
-           _allDistMargin: function (node, m, M, compare) {
+             for (var index in way.nodes) {
+               if (way.nodes[index] === nodeID) {
+                 occurrences += 1;
+                 if (occurrences > 1) return true;
+               }
+             }

 
 

-               node.children.sort(compare);
+             return false;
+           }

 
 

-               var toBBox = this.toBBox,
-                   leftBBox = distBBox$1(node, 0, m, toBBox),
-                   rightBBox = distBBox$1(node, M - m, M, toBBox),
-                   margin = bboxMargin$1(leftBBox) + bboxMargin$1(rightBBox),
-                   i, child;
+           function isConnectedViaOtherTypes(way, node) {
+             var wayType = typeForWay(way);

 
 

-               for (i = m; i < M - m; i++) {
-                   child = node.children[i];
-                   extend$3(leftBBox, node.leaf ? toBBox(child) : child);
-                   margin += bboxMargin$1(leftBBox);
+             if (wayType === 'highway') {
+               // entrances are considered connected
+               if (node.tags.entrance && node.tags.entrance !== 'no') return true;
+               if (node.tags.amenity === 'parking_entrance') return true;
+             } else if (wayType === 'waterway') {
+               if (node.id === way.first()) {
+                 // multiple waterways may start at the same spring
+                 if (node.tags.natural === 'spring') return true;
+               } else {
+                 // multiple waterways may end at the same drain
+                 if (node.tags.manhole === 'drain') return true;

                }
                }

+             }

 
 

-               for (i = M - m - 1; i >= m; i--) {
-                   child = node.children[i];
-                   extend$3(rightBBox, node.leaf ? toBBox(child) : child);
-                   margin += bboxMargin$1(rightBBox);
-               }
+             return graph.parentWays(node).some(function (parentWay) {
+               if (parentWay.id === way.id) return false;

 
 

-               return margin;
-           },
+               if (wayType === 'highway') {
+                 // allow connections to highway areas
+                 if (parentWay.geometry(graph) === 'area' && osmRoutableHighwayTagValues[parentWay.tags.highway]) return true; // count connections to ferry routes as connected

 
 

-           _adjustParentBBoxes: function (bbox, path, level) {
-               // adjust bboxes along the given tree path
-               for (var i = level; i >= 0; i--) {
-                   extend$3(path[i], bbox);
+                 if (parentWay.tags.route === 'ferry') return true;
+                 return graph.parentRelations(parentWay).some(function (parentRelation) {
+                   if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true; // allow connections to highway multipolygons
+
+                   return parentRelation.isMultipolygon() && osmRoutableHighwayTagValues[parentRelation.tags.highway];
+                 });
+               } else if (wayType === 'waterway') {
+                 // multiple waterways may start or end at a water body at the same node
+                 if (parentWay.tags.natural === 'water' || parentWay.tags.natural === 'coastline') return true;

                }
                }

-           },

 
 

-           _condense: function (path) {
-               // go through the path, removing empty nodes and updating bboxes
-               for (var i = path.length - 1, siblings; i >= 0; i--) {
-                   if (path[i].children.length === 0) {
-                       if (i > 0) {
-                           siblings = path[i - 1].children;
-                           siblings.splice(siblings.indexOf(path[i]), 1);
+               return false;
+             });
+           }

 
 

-                       } else { this.clear(); }
+           function issuesForNode(way, nodeID) {
+             var isFirst = nodeID === way.first();
+             var wayType = typeForWay(way); // ignore if this way is self-connected at this node

 
 

-                   } else { calcBBox$1(path[i], this.toBBox); }
-               }
-           },
+             if (nodeOccursMoreThanOnce(way, nodeID)) return [];
+             var osm = services.osm;
+             if (!osm) return [];
+             var node = graph.hasEntity(nodeID); // ignore if this node or its tile are unloaded
+
+             if (!node || !osm.isDataLoaded(node.loc)) return [];
+             if (isConnectedViaOtherTypes(way, node)) return [];
+             var attachedWaysOfSameType = graph.parentWays(node).filter(function (parentWay) {
+               if (parentWay.id === way.id) return false;
+               return typeForWay(parentWay) === wayType;
+             }); // assume it's okay for waterways to start or end disconnected for now
+
+             if (wayType === 'waterway' && attachedWaysOfSameType.length === 0) return [];
+             var attachedOneways = attachedWaysOfSameType.filter(function (attachedWay) {
+               return isOneway(attachedWay);
+             }); // ignore if the way is connected to some non-oneway features
+
+             if (attachedOneways.length < attachedWaysOfSameType.length) return [];
+
+             if (attachedOneways.length) {
+               var connectedEndpointsOkay = attachedOneways.some(function (attachedOneway) {
+                 if ((isFirst ? attachedOneway.first() : attachedOneway.last()) !== nodeID) return true;
+                 if (nodeOccursMoreThanOnce(attachedOneway, nodeID)) return true;
+                 return false;
+               });
+               if (connectedEndpointsOkay) return [];
+             }

 
 

-           _initFormat: function (format) {
-               // data format (minX, minY, maxX, maxY accessors)
+             var placement = isFirst ? 'start' : 'end',
+                 messageID = wayType + '.',
+                 referenceID = wayType + '.';

 
 

-               // uses eval-type function compilation instead of just accepting a toBBox function
-               // because the algorithms are very sensitive to sorting functions performance,
-               // so they should be dead simple and without inner calls
+             if (wayType === 'waterway') {
+               messageID += 'connected.' + placement;
+               referenceID += 'connected';
+             } else {
+               messageID += placement;
+               referenceID += placement;
+             }

 
 

-               var compareArr = ['return a', ' - b', ';'];
+             return [new validationIssue({
+               type: type,
+               subtype: wayType,
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(this.entityIds[0]);
+                 return entity ? _t.html('issues.impossible_oneway.' + messageID + '.message', {
+                   feature: utilDisplayLabel(entity, context.graph())
+                 }) : '';
+               },
+               reference: getReference(referenceID),
+               entityIds: [way.id, node.id],
+               dynamicFixes: function dynamicFixes() {
+                 var fixes = [];

 
 

-               this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));
-               this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));
+                 if (attachedOneways.length) {
+                   fixes.push(new validationIssueFix({
+                     icon: 'iD-operation-reverse',
+                     title: _t.html('issues.fix.reverse_feature.title'),
+                     entityIds: [way.id],
+                     onClick: function onClick(context) {
+                       var id = this.issue.entityIds[0];
+                       context.perform(actionReverse(id), _t('operations.reverse.annotation.line', {
+                         n: 1
+                       }));
+                     }
+                   }));
+                 }

 
 

-               this.toBBox = new Function('a',
-                   'return {minX: a' + format[0] +
-                   ', minY: a' + format[1] +
-                   ', maxX: a' + format[2] +
-                   ', maxY: a' + format[3] + '};');
-           }
-       };
+                 if (node.tags.noexit !== 'yes') {
+                   var textDirection = _mainLocalizer.textDirection();
+                   var useLeftContinue = isFirst && textDirection === 'ltr' || !isFirst && textDirection === 'rtl';
+                   fixes.push(new validationIssueFix({
+                     icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
+                     title: _t.html('issues.fix.continue_from_' + (isFirst ? 'start' : 'end') + '.title'),
+                     onClick: function onClick(context) {
+                       var entityID = this.issue.entityIds[0];
+                       var vertexID = this.issue.entityIds[1];
+                       var way = context.entity(entityID);
+                       var vertex = context.entity(vertexID);
+                       continueDrawing(way, vertex, context);
+                     }
+                   }));
+                 }

 
 

-       function findItem$1(item, items, equalsFn) {
-           if (!equalsFn) { return items.indexOf(item); }
+                 return fixes;
+               },
+               loc: node.loc
+             })];

 
 

-           for (var i = 0; i < items.length; i++) {
-               if (equalsFn(item, items[i])) { return i; }
+             function getReference(referenceID) {
+               return function showReference(selection) {
+                 selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.impossible_oneway.' + referenceID + '.reference'));
+               };
+             }

            }
            }

-           return -1;
-       }
-
-       // calculate node's bbox from bboxes of its children
-       function calcBBox$1(node, toBBox) {
-           distBBox$1(node, 0, node.children.length, toBBox, node);
-       }
+         };

 
 

-       // min bounding rectangle of node children from k to p-1
-       function distBBox$1(node, k, p, toBBox, destNode) {
-           if (!destNode) { destNode = createNode$1(null); }
-           destNode.minX = Infinity;
-           destNode.minY = Infinity;
-           destNode.maxX = -Infinity;
-           destNode.maxY = -Infinity;
+         function continueDrawing(way, vertex, context) {
+           // make sure the vertex is actually visible and editable
+           var map = context.map();

 
 

-           for (var i = k, child; i < p; i++) {
-               child = node.children[i];
-               extend$3(destNode, node.leaf ? toBBox(child) : child);
+           if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+             map.zoomToEase(vertex);

            }
 
            }
 

-           return destNode;
-       }
+           context.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
+         }

 
 

-       function extend$3(a, b) {
-           a.minX = Math.min(a.minX, b.minX);
-           a.minY = Math.min(a.minY, b.minY);
-           a.maxX = Math.max(a.maxX, b.maxX);
-           a.maxY = Math.max(a.maxY, b.maxY);
-           return a;
+         validation.type = type;
+         return validation;

        }
 
        }
 

-       function compareNodeMinX$1(a, b) { return a.minX - b.minX; }
-       function compareNodeMinY$1(a, b) { return a.minY - b.minY; }
+       function validationIncompatibleSource() {
+         var type = 'incompatible_source';
+         var incompatibleRules = [{
+           id: 'amap',
+           regex: /(amap|autonavi|mapabc|高德)/i
+         }, {
+           id: 'baidu',
+           regex: /(baidu|mapbar|百度)/i
+         }, {
+           id: 'google',
+           regex: /google/i,
+           exceptRegex: /((books|drive)\.google|google\s?(books|drive|plus))/i
+         }];
+
+         var validation = function checkIncompatibleSource(entity) {
+           var entitySources = entity.tags && entity.tags.source && entity.tags.source.split(';');
+           if (!entitySources) return [];
+           var entityID = entity.id;
+           return entitySources.map(function (source) {
+             var matchRule = incompatibleRules.find(function (rule) {
+               if (!rule.regex.test(source)) return false;
+               if (rule.exceptRegex && rule.exceptRegex.test(source)) return false;
+               return true;
+             });
+             if (!matchRule) return null;
+             return new validationIssue({
+               type: type,
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(entityID);
+                 return entity ? _t.html('issues.incompatible_source.feature.message', {
+                   feature: utilDisplayLabel(entity, context.graph(), true
+                   /* verbose */
+                   ),
+                   value: source
+                 }) : '';
+               },
+               reference: getReference(matchRule.id),
+               entityIds: [entityID],
+               hash: source,
+               dynamicFixes: function dynamicFixes() {
+                 return [new validationIssueFix({
+                   title: _t.html('issues.fix.remove_proprietary_data.title')
+                 })];
+               }
+             });
+           }).filter(Boolean);

 
 

-       function bboxArea$1(a)   { return (a.maxX - a.minX) * (a.maxY - a.minY); }
-       function bboxMargin$1(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }
+           function getReference(id) {
+             return function showReference(selection) {
+               selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html("issues.incompatible_source.reference.".concat(id)));
+             };
+           }
+         };

 
 

-       function enlargedArea$1(a, b) {
-           return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *
-                  (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
+         validation.type = type;
+         return validation;

        }
 
        }
 

-       function intersectionArea$1(a, b) {
-           var minX = Math.max(a.minX, b.minX),
-               minY = Math.max(a.minY, b.minY),
-               maxX = Math.min(a.maxX, b.maxX),
-               maxY = Math.min(a.maxY, b.maxY);
+       function validationMaprules() {
+         var type = 'maprules';

 
 

-           return Math.max(0, maxX - minX) *
-                  Math.max(0, maxY - minY);
-       }
+         var validation = function checkMaprules(entity, graph) {
+           if (!services.maprules) return [];
+           var rules = services.maprules.validationRules();
+           var issues = [];

 
 

-       function contains$2(a, b) {
-           return a.minX <= b.minX &&
-                  a.minY <= b.minY &&
-                  b.maxX <= a.maxX &&
-                  b.maxY <= a.maxY;
-       }
+           for (var i = 0; i < rules.length; i++) {
+             var rule = rules[i];
+             rule.findIssues(entity, graph, issues);
+           }

 
 

-       function intersects$1(a, b) {
-           return b.minX <= a.maxX &&
-                  b.minY <= a.maxY &&
-                  b.maxX >= a.minX &&
-                  b.maxY >= a.minY;
-       }
+           return issues;
+         };

 
 

-       function createNode$1(children) {
-           return {
-               children: children,
-               height: 1,
-               leaf: true,
-               minX: Infinity,
-               minY: Infinity,
-               maxX: -Infinity,
-               maxY: -Infinity
-           };
+         validation.type = type;
+         return validation;

        }
 
        }
 

-       // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
-       // combines selection algorithm with binary divide & conquer approach
-
-       function multiSelect$1(arr, left, right, n, compare) {
-           var stack = [left, right],
-               mid;
+       function validationMismatchedGeometry() {
+         var type = 'mismatched_geometry';

 
 

-           while (stack.length) {
-               right = stack.pop();
-               left = stack.pop();
+         function tagSuggestingLineIsArea(entity) {
+           if (entity.type !== 'way' || entity.isClosed()) return null;
+           var tagSuggestingArea = entity.tagSuggestingArea();

 
 

-               if (right - left <= n) { continue; }
+           if (!tagSuggestingArea) {
+             return null;
+           }

 
 

-               mid = left + Math.ceil((right - left) / n / 2) * n;
-               quickselect$1(arr, mid, left, right, compare);
+           var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
+           var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');

 
 

-               stack.push(left, mid, mid, right);
+           if (asLine && asArea && asLine === asArea) {
+             // these tags also allow lines and making this an area wouldn't matter
+             return null;

            }
            }

-       }
-       rbush_1.default = _default$2;

 
 

-       var lineclip_1$1 = lineclip$1;
+           return tagSuggestingArea;
+         }

 
 

-       lineclip$1.polyline = lineclip$1;
-       lineclip$1.polygon = polygonclip$1;
+         function makeConnectEndpointsFixOnClick(way, graph) {
+           // must have at least three nodes to close this automatically
+           if (way.nodes.length < 3) return null;
+           var nodes = graph.childNodes(way),
+               testNodes;
+           var firstToLastDistanceMeters = geoSphericalDistance(nodes[0].loc, nodes[nodes.length - 1].loc); // if the distance is very small, attempt to merge the endpoints

 
 

+           if (firstToLastDistanceMeters < 0.75) {
+             testNodes = nodes.slice(); // shallow copy

 
 

-       // Cohen-Sutherland line clippign algorithm, adapted to efficiently
-       // handle polylines rather than just segments
+             testNodes.pop();
+             testNodes.push(testNodes[0]); // make sure this will not create a self-intersection

 
 

-       function lineclip$1(points, bbox, result) {
+             if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
+               return function (context) {
+                 var way = context.entity(this.issue.entityIds[0]);
+                 context.perform(actionMergeNodes([way.nodes[0], way.nodes[way.nodes.length - 1]], nodes[0].loc), _t('issues.fix.connect_endpoints.annotation'));
+               };
+             }
+           } // if the points were not merged, attempt to close the way

 
 

-           var len = points.length,
-               codeA = bitCode$1(points[0], bbox),
-               part = [],
-               i, a, b, codeB, lastCode;

 
 

-           if (!result) { result = []; }
+           testNodes = nodes.slice(); // shallow copy

 
 

-           for (i = 1; i < len; i++) {
-               a = points[i - 1];
-               b = points[i];
-               codeB = lastCode = bitCode$1(b, bbox);
+           testNodes.push(testNodes[0]); // make sure this will not create a self-intersection

 
 

-               while (true) {
+           if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
+             return function (context) {
+               var wayId = this.issue.entityIds[0];
+               var way = context.entity(wayId);
+               var nodeId = way.nodes[0];
+               var index = way.nodes.length;
+               context.perform(actionAddVertex(wayId, nodeId, index), _t('issues.fix.connect_endpoints.annotation'));
+             };
+           }
+         }

 
 

-                   if (!(codeA | codeB)) { // accept
-                       part.push(a);
+         function lineTaggedAsAreaIssue(entity) {
+           var tagSuggestingArea = tagSuggestingLineIsArea(entity);
+           if (!tagSuggestingArea) return null;
+           return new validationIssue({
+             type: type,
+             subtype: 'area_as_line',
+             severity: 'warning',
+             message: function message(context) {
+               var entity = context.hasEntity(this.entityIds[0]);
+               return entity ? _t.html('issues.tag_suggests_area.message', {
+                 feature: utilDisplayLabel(entity, 'area', true
+                 /* verbose */
+                 ),
+                 tag: utilTagText({
+                   tags: tagSuggestingArea
+                 })
+               }) : '';
+             },
+             reference: showReference,
+             entityIds: [entity.id],
+             hash: JSON.stringify(tagSuggestingArea),
+             dynamicFixes: function dynamicFixes(context) {
+               var fixes = [];
+               var entity = context.entity(this.entityIds[0]);
+               var connectEndsOnClick = makeConnectEndpointsFixOnClick(entity, context.graph());
+               fixes.push(new validationIssueFix({
+                 title: _t.html('issues.fix.connect_endpoints.title'),
+                 onClick: connectEndsOnClick
+               }));
+               fixes.push(new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.remove_tag.title'),
+                 onClick: function onClick(context) {
+                   var entityId = this.issue.entityIds[0];
+                   var entity = context.entity(entityId);
+                   var tags = Object.assign({}, entity.tags); // shallow copy

 
 

-                       if (codeB !== lastCode) { // segment went outside
-                           part.push(b);
+                   for (var key in tagSuggestingArea) {
+                     delete tags[key];
+                   }

 
 

-                           if (i < len - 1) { // start a new line
-                               result.push(part);
-                               part = [];
-                           }
-                       } else if (i === len - 1) {
-                           part.push(b);
-                       }
-                       break;
+                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
+                 }
+               }));
+               return fixes;
+             }
+           });

 
 

-                   } else if (codeA & codeB) { // trivial reject
-                       break;
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.tag_suggests_area.reference'));
+           }
+         }

 
 

-                   } else if (codeA) { // a outside, intersect with clip edge
-                       a = intersect$1(a, b, codeA, bbox);
-                       codeA = bitCode$1(a, bbox);
+         function vertexPointIssue(entity, graph) {
+           // we only care about nodes
+           if (entity.type !== 'node') return null; // ignore tagless points

 
 

-                   } else { // b outside
-                       b = intersect$1(a, b, codeB, bbox);
-                       codeB = bitCode$1(b, bbox);
-                   }
-               }
+           if (Object.keys(entity.tags).length === 0) return null; // address lines are special so just ignore them
+
+           if (entity.isOnAddressLine(graph)) return null;
+           var geometry = entity.geometry(graph);
+           var allowedGeometries = osmNodeGeometriesForTags(entity.tags);

 
 

-               codeA = lastCode;
+           if (geometry === 'point' && !allowedGeometries.point && allowedGeometries.vertex) {
+             return new validationIssue({
+               type: type,
+               subtype: 'vertex_as_point',
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(this.entityIds[0]);
+                 return entity ? _t.html('issues.vertex_as_point.message', {
+                   feature: utilDisplayLabel(entity, 'vertex', true
+                   /* verbose */
+                   )
+                 }) : '';
+               },
+               reference: function showReference(selection) {
+                 selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.vertex_as_point.reference'));
+               },
+               entityIds: [entity.id]
+             });
+           } else if (geometry === 'vertex' && !allowedGeometries.vertex && allowedGeometries.point) {
+             return new validationIssue({
+               type: type,
+               subtype: 'point_as_vertex',
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(this.entityIds[0]);
+                 return entity ? _t.html('issues.point_as_vertex.message', {
+                   feature: utilDisplayLabel(entity, 'point', true
+                   /* verbose */
+                   )
+                 }) : '';
+               },
+               reference: function showReference(selection) {
+                 selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.point_as_vertex.reference'));
+               },
+               entityIds: [entity.id],
+               dynamicFixes: extractPointDynamicFixes
+             });

            }
 
            }
 

-           if (part.length) { result.push(part); }
+           return null;
+         }

 
 

-           return result;
-       }
+         function otherMismatchIssue(entity, graph) {
+           // ignore boring features
+           if (!entity.hasInterestingTags()) return null;
+           if (entity.type !== 'node' && entity.type !== 'way') return null; // address lines are special so just ignore them
+
+           if (entity.type === 'node' && entity.isOnAddressLine(graph)) return null;
+           var sourceGeom = entity.geometry(graph);
+           var targetGeoms = entity.type === 'way' ? ['point', 'vertex'] : ['line', 'area'];
+           if (sourceGeom === 'area') targetGeoms.unshift('line');
+           var asSource = _mainPresetIndex.match(entity, graph);
+           var targetGeom = targetGeoms.find(function (nodeGeom) {
+             var asTarget = _mainPresetIndex.matchTags(entity.tags, nodeGeom);
+             if (!asSource || !asTarget || asSource === asTarget || // sometimes there are two presets with the same tags for different geometries
+             fastDeepEqual(asSource.tags, asTarget.tags)) return false;
+             if (asTarget.isFallback()) return false;
+             var primaryKey = Object.keys(asTarget.tags)[0]; // special case: buildings-as-points are discouraged by iD, but common in OSM, so ignore them
+
+             if (primaryKey === 'building') return false;
+             if (asTarget.tags[primaryKey] === '*') return false;
+             return asSource.isFallback() || asSource.tags[primaryKey] === '*';
+           });
+           if (!targetGeom) return null;
+           var subtype = targetGeom + '_as_' + sourceGeom;
+           if (targetGeom === 'vertex') targetGeom = 'point';
+           if (sourceGeom === 'vertex') sourceGeom = 'point';
+           var referenceId = targetGeom + '_as_' + sourceGeom;
+           var dynamicFixes;

 
 

-       // Sutherland-Hodgeman polygon clipping algorithm
+           if (targetGeom === 'point') {
+             dynamicFixes = extractPointDynamicFixes;
+           } else if (sourceGeom === 'area' && targetGeom === 'line') {
+             dynamicFixes = lineToAreaDynamicFixes;
+           }

 
 

-       function polygonclip$1(points, bbox) {
+           return new validationIssue({
+             type: type,
+             subtype: subtype,
+             severity: 'warning',
+             message: function message(context) {
+               var entity = context.hasEntity(this.entityIds[0]);
+               return entity ? _t.html('issues.' + referenceId + '.message', {
+                 feature: utilDisplayLabel(entity, targetGeom, true
+                 /* verbose */
+                 )
+               }) : '';
+             },
+             reference: function showReference(selection) {
+               selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.mismatched_geometry.reference'));
+             },
+             entityIds: [entity.id],
+             dynamicFixes: dynamicFixes
+           });
+         }

 
 

-           var result, edge, prev, prevInside, i, p, inside;
+         function lineToAreaDynamicFixes(context) {
+           var convertOnClick;
+           var entityId = this.entityIds[0];
+           var entity = context.entity(entityId);
+           var tags = Object.assign({}, entity.tags); // shallow copy

 
 

-           // clip against each side of the clip rectangle
-           for (edge = 1; edge <= 8; edge *= 2) {
-               result = [];
-               prev = points[points.length - 1];
-               prevInside = !(bitCode$1(prev, bbox) & edge);
+           delete tags.area;

 
 

-               for (i = 0; i < points.length; i++) {
-                   p = points[i];
-                   inside = !(bitCode$1(p, bbox) & edge);
+           if (!osmTagSuggestingArea(tags)) {
+             // if removing the area tag would make this a line, offer that as a quick fix
+             convertOnClick = function convertOnClick(context) {
+               var entityId = this.issue.entityIds[0];
+               var entity = context.entity(entityId);
+               var tags = Object.assign({}, entity.tags); // shallow copy

 
 

-                   // if segment goes through the clip window, add an intersection
-                   if (inside !== prevInside) { result.push(intersect$1(prev, p, edge, bbox)); }
+               if (tags.area) {
+                 delete tags.area;
+               }

 
 

-                   if (inside) { result.push(p); } // add a point if it's inside
+               context.perform(actionChangeTags(entityId, tags), _t('issues.fix.convert_to_line.annotation'));
+             };
+           }

 
 

-                   prev = p;
-                   prevInside = inside;
-               }
+           return [new validationIssueFix({
+             icon: 'iD-icon-line',
+             title: _t.html('issues.fix.convert_to_line.title'),
+             onClick: convertOnClick
+           })];
+         }

 
 

-               points = result;
+         function extractPointDynamicFixes(context) {
+           var entityId = this.entityIds[0];
+           var extractOnClick = null;

 
 

-               if (!points.length) { break; }
-           }
+           if (!context.hasHiddenConnections(entityId)) {
+             extractOnClick = function extractOnClick(context) {
+               var entityId = this.issue.entityIds[0];
+               var action = actionExtract(entityId, context.projection);
+               context.perform(action, _t('operations.extract.annotation', {
+                 n: 1
+               })); // re-enter mode to trigger updates

 
 

-           return result;
-       }
+               context.enter(modeSelect(context, [action.getExtractedNodeID()]));
+             };
+           }

 
 

-       // intersect a segment against one of the 4 lines that make up the bbox
+           return [new validationIssueFix({
+             icon: 'iD-operation-extract',
+             title: _t.html('issues.fix.extract_point.title'),
+             onClick: extractOnClick
+           })];
+         }

 
 

-       function intersect$1(a, b, edge, bbox) {
-           return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
-                  edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
-                  edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
-                  edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
-                  null;
-       }
+         function unclosedMultipolygonPartIssues(entity, graph) {
+           if (entity.type !== 'relation' || !entity.isMultipolygon() || entity.isDegenerate() || // cannot determine issues for incompletely-downloaded relations
+           !entity.isComplete(graph)) return [];
+           var sequences = osmJoinWays(entity.members, graph);
+           var issues = [];

 
 

-       // bit code reflects the point position relative to the bbox:
+           for (var i in sequences) {
+             var sequence = sequences[i];
+             if (!sequence.nodes) continue;
+             var firstNode = sequence.nodes[0];
+             var lastNode = sequence.nodes[sequence.nodes.length - 1]; // part is closed if the first and last nodes are the same

 
 

-       //         left  mid  right
-       //    top  1001  1000  1010
-       //    mid  0001  0000  0010
-       // bottom  0101  0100  0110
+             if (firstNode === lastNode) continue;
+             var issue = new validationIssue({
+               type: type,
+               subtype: 'unclosed_multipolygon_part',
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(this.entityIds[0]);
+                 return entity ? _t.html('issues.unclosed_multipolygon_part.message', {
+                   feature: utilDisplayLabel(entity, context.graph(), true
+                   /* verbose */
+                   )
+                 }) : '';
+               },
+               reference: showReference,
+               loc: sequence.nodes[0].loc,
+               entityIds: [entity.id],
+               hash: sequence.map(function (way) {
+                 return way.id;
+               }).join()
+             });
+             issues.push(issue);
+           }

 
 

-       function bitCode$1(p, bbox) {
-           var code = 0;
+           return issues;

 
 

-           if (p[0] < bbox[0]) { code |= 1; } // left
-           else if (p[0] > bbox[2]) { code |= 2; } // right
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unclosed_multipolygon_part.reference'));
+           }
+         }

 
 

-           if (p[1] < bbox[1]) { code |= 4; } // bottom
-           else if (p[1] > bbox[3]) { code |= 8; } // top
+         var validation = function checkMismatchedGeometry(entity, graph) {
+           var vertexPoint = vertexPointIssue(entity, graph);
+           if (vertexPoint) return [vertexPoint];
+           var lineAsArea = lineTaggedAsAreaIssue(entity);
+           if (lineAsArea) return [lineAsArea];
+           var mismatch = otherMismatchIssue(entity, graph);
+           if (mismatch) return [mismatch];
+           return unclosedMultipolygonPartIssues(entity, graph);
+         };

 
 

-           return code;
+         validation.type = type;
+         return validation;

        }
 
        }
 

-       var whichPolygon_1 = whichPolygon;
+       function validationMissingRole() {
+         var type = 'missing_role';

 
 

-       function whichPolygon(data) {
-           var bboxes = [];
-           for (var i = 0; i < data.features.length; i++) {
-               var feature = data.features[i];
-               var coords = feature.geometry.coordinates;
+         var validation = function checkMissingRole(entity, graph) {
+           var issues = [];

 
 

-               if (feature.geometry.type === 'Polygon') {
-                   bboxes.push(treeItem(coords, feature.properties));
+           if (entity.type === 'way') {
+             graph.parentRelations(entity).forEach(function (relation) {
+               if (!relation.isMultipolygon()) return;
+               var member = relation.memberById(entity.id);

 
 

-               } else if (feature.geometry.type === 'MultiPolygon') {
-                   for (var j = 0; j < coords.length; j++) {
-                       bboxes.push(treeItem(coords[j], feature.properties));
-                   }
+               if (member && isMissingRole(member)) {
+                 issues.push(makeIssue(entity, relation, member));

                }
                }

-           }
-
-           var tree = rbush_1().load(bboxes);
+             });
+           } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+             entity.indexedMembers().forEach(function (member) {
+               var way = graph.hasEntity(member.id);

 
 

-           function query(p, multi) {
-               var output = [],
-                   result = tree.search({
-                       minX: p[0],
-                       minY: p[1],
-                       maxX: p[0],
-                       maxY: p[1]
-                   });
-               for (var i = 0; i < result.length; i++) {
-                   if (insidePolygon(result[i].coords, p)) {
-                       if (multi)
-                           { output.push(result[i].props); }
-                       else
-                           { return result[i].props; }
-                   }
+               if (way && isMissingRole(member)) {
+                 issues.push(makeIssue(way, entity, member));

                }
                }

-               return multi && output.length ? output : null;
+             });

            }
 
            }
 

-           query.tree = tree;
-           query.bbox = function queryBBox(bbox) {
-               var output = [];
-               var result = tree.search({
-                   minX: bbox[0],
-                   minY: bbox[1],
-                   maxX: bbox[2],
-                   maxY: bbox[3]
-               });
-               for (var i = 0; i < result.length; i++) {
-                   if (polygonIntersectsBBox(result[i].coords, bbox)) {
-                       output.push(result[i].props);
-                   }
-               }
-               return output;
-           };
+           return issues;
+         };

 
 

-           return query;
-       }
+         function isMissingRole(member) {
+           return !member.role || !member.role.trim().length;
+         }

 
 

-       function polygonIntersectsBBox(polygon, bbox) {
-           var bboxCenter = [
-               (bbox[0] + bbox[2]) / 2,
-               (bbox[1] + bbox[3]) / 2
-           ];
-           if (insidePolygon(polygon, bboxCenter)) { return true; }
-           for (var i = 0; i < polygon.length; i++) {
-               if (lineclip_1$1(polygon[i], bbox).length > 0) { return true; }
-           }
-           return false;
-       }
+         function makeIssue(way, relation, member) {
+           return new validationIssue({
+             type: type,
+             severity: 'warning',
+             message: function message(context) {
+               var member = context.hasEntity(this.entityIds[1]),
+                   relation = context.hasEntity(this.entityIds[0]);
+               return member && relation ? _t.html('issues.missing_role.message', {
+                 member: utilDisplayLabel(member, context.graph()),
+                 relation: utilDisplayLabel(relation, context.graph())
+               }) : '';
+             },
+             reference: showReference,
+             entityIds: [relation.id, way.id],
+             data: {
+               member: member
+             },
+             hash: member.index.toString(),
+             dynamicFixes: function dynamicFixes() {
+               return [makeAddRoleFix('inner'), makeAddRoleFix('outer'), new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.remove_from_relation.title'),
+                 onClick: function onClick(context) {
+                   context.perform(actionDeleteMember(this.issue.entityIds[0], this.issue.data.member.index), _t('operations.delete_member.annotation', {
+                     n: 1
+                   }));
+                 }
+               })];
+             }
+           });

 
 

-       // ray casting algorithm for detecting if point is in polygon
-       function insidePolygon(rings, p) {
-           var inside = false;
-           for (var i = 0, len = rings.length; i < len; i++) {
-               var ring = rings[i];
-               for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
-                   if (rayIntersect(p, ring[j], ring[k])) { inside = !inside; }
-               }
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.missing_role.multipolygon.reference'));

            }
            }

-           return inside;
-       }
-
-       function rayIntersect(p, p1, p2) {
-           return ((p1[1] > p[1]) !== (p2[1] > p[1])) && (p[0] < (p2[0] - p1[0]) * (p[1] - p1[1]) / (p2[1] - p1[1]) + p1[0]);
-       }
+         }

 
 

-       function treeItem(coords, props) {
-           var item = {
-               minX: Infinity,
-               minY: Infinity,
-               maxX: -Infinity,
-               maxY: -Infinity,
-               coords: coords,
-               props: props
-           };
+         function makeAddRoleFix(role) {
+           return new validationIssueFix({
+             title: _t.html('issues.fix.set_as_' + role + '.title'),
+             onClick: function onClick(context) {
+               var oldMember = this.issue.data.member;
+               var member = {
+                 id: this.issue.entityIds[1],
+                 type: oldMember.type,
+                 role: role
+               };
+               context.perform(actionChangeMember(this.issue.entityIds[0], member, oldMember.index), _t('operations.change_role.annotation', {
+                 n: 1
+               }));
+             }
+           });
+         }

 
 

-           for (var i = 0; i < coords[0].length; i++) {
-               var p = coords[0][i];
-               item.minX = Math.min(item.minX, p[0]);
-               item.minY = Math.min(item.minY, p[1]);
-               item.maxX = Math.max(item.maxX, p[0]);
-               item.maxY = Math.max(item.maxY, p[1]);
-           }
-           return item;
+         validation.type = type;
+         return validation;

        }
 
        }
 

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-       var whichPolygonGetter = {};
-       var featuresByCode = {};
-       var idFilterRegex = /\bThe\b|\bthe\b|\band\b|\bof\b|[-_ .,()&[\]/]/g;
-       var levels = [
-         'subterritory',
-         'territory',
-         'country',
-         'intermediateRegion',
-         'subregion',
-         'region',
-         'union',
-         'world'
-       ];
-       loadDerivedDataAndCaches(borders);
-       function loadDerivedDataAndCaches(borders) {
-         var identifierProps = ['iso1A2', 'iso1A3', 'm49', 'wikidata', 'emojiFlag', 'nameEn'];
-         var geometryFeatures = [];
-         for (var i in borders.features) {
-           var feature = borders.features[i];
-           feature.properties.id = feature.properties.iso1A2 || feature.properties.m49;
-           loadM49(feature);
-           loadIsoStatus(feature);
-           loadLevel(feature);
-           loadGroups(feature);
-           loadRoadSpeedUnit(feature);
-           loadDriveSide(feature);
-           loadFlag(feature);
-           cacheFeatureByIDs(feature);
-           if (feature.geometry) { geometryFeatures.push(feature); }
-         }
-         for (var i$1 in borders.features) {
-           var feature$1 = borders.features[i$1];
-           feature$1.properties.groups.sort(function(groupID1, groupID2) {
-             return (
-               levels.indexOf(featuresByCode[groupID1].properties.level) -
-               levels.indexOf(featuresByCode[groupID2].properties.level)
-             );
+       function validationMissingTag(context) {
+         var type = 'missing_tag';
+
+         function hasDescriptiveTags(entity, graph) {
+           var onlyAttributeKeys = ['description', 'name', 'note', 'start_date'];
+           var entityDescriptiveKeys = Object.keys(entity.tags).filter(function (k) {
+             if (k === 'area' || !osmIsInterestingTag(k)) return false;
+             return !onlyAttributeKeys.some(function (attributeKey) {
+               return k === attributeKey || k.indexOf(attributeKey + ':') === 0;
+             });

            });
            });

-           loadMembersForGroupsOf(feature$1);
-         }
-         var geometryOnlyCollection = {
-           type: 'RegionFeatureCollection',
-           features: geometryFeatures
-         };
-         whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
-         function loadGroups(feature) {
-           var props = feature.properties;
-           if (!props.groups) {
-             props.groups = [];
-           }
-           if (props.country) {
-             props.groups.push(props.country);
-           }
-           if (props.m49 !== '001') {
-             props.groups.push('001');
-           }
-         }
-         function loadM49(feature) {
-           var props = feature.properties;
-           if (!props.m49 && props.iso1N3) {
-             props.m49 = props.iso1N3;
-           }
-         }
-         function loadIsoStatus(feature) {
-           var props = feature.properties;
-           if (!props.isoStatus && props.iso1A2) {
-             props.isoStatus = 'official';
-           }
-         }
-         function loadLevel(feature) {
-           var props = feature.properties;
-           if (props.level) { return; }
-           if (!props.country) {
-             props.level = 'country';
-           } else if (props.isoStatus === 'official') {
-             props.level = 'territory';
-           } else {
-             props.level = 'subterritory';
-           }
-         }
-         function loadRoadSpeedUnit(feature) {
-           var props = feature.properties;
-           if (props.roadSpeedUnit === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-             props.roadSpeedUnit = 'km/h';
-           }
-         }
-         function loadDriveSide(feature) {
-           var props = feature.properties;
-           if (props.driveSide === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-             props.driveSide = 'right';
+
+           if (entity.type === 'relation' && entityDescriptiveKeys.length === 1 && entity.tags.type === 'multipolygon') {
+             // this relation's only interesting tag just says its a multipolygon,
+             // which is not descriptive enough
+             // It's okay for a simple multipolygon to have no descriptive tags
+             // if its outer way has them (old model, see `outdated_tags.js`)
+             return osmOldMultipolygonOuterMemberOfRelation(entity, graph);

            }
            }

+
+           return entityDescriptiveKeys.length > 0;

          }
          }

-         function loadFlag(feature) {
-           if (!feature.properties.iso1A2) { return; }
-           var flag = feature.properties.iso1A2.replace(/./g, function(char) {
-             return String.fromCodePoint(char.charCodeAt(0) + 127397);
-           });
-           feature.properties.emojiFlag = flag;
+
+         function isUnknownRoad(entity) {
+           return entity.type === 'way' && entity.tags.highway === 'road';

          }
          }

-         function loadMembersForGroupsOf(feature) {
-           var featureID = feature.properties.id;
-           var standardizedGroupIDs = [];
-           for (var j in feature.properties.groups) {
-             var groupID = feature.properties.groups[j];
-             var groupFeature = featuresByCode[groupID];
-             standardizedGroupIDs.push(groupFeature.properties.id);
-             if (groupFeature.properties.members) {
-               groupFeature.properties.members.push(featureID);
-             } else {
-               groupFeature.properties.members = [featureID];
-             }
-           }
-           feature.properties.groups = standardizedGroupIDs;
+
+         function isUntypedRelation(entity) {
+           return entity.type === 'relation' && !entity.tags.type;

          }
          }

-         function cacheFeatureByIDs(feature) {
-           for (var k in identifierProps) {
-             var prop = identifierProps[k];
-             var id = prop && feature.properties[prop];
-             if (id) {
-               id = id.replace(idFilterRegex, '').toUpperCase();
-               featuresByCode[id] = feature;
-             }
-           }
-           if (feature.properties.aliases) {
-             for (var j in feature.properties.aliases) {
-               var alias = feature.properties.aliases[j].replace(idFilterRegex, '').toUpperCase();
-               featuresByCode[alias] = feature;
+
+         var validation = function checkMissingTag(entity, graph) {
+           var subtype;
+           var osm = context.connection();
+           var isUnloadedNode = entity.type === 'node' && osm && !osm.isDataLoaded(entity.loc); // we can't know if the node is a vertex if the tile is undownloaded
+
+           if (!isUnloadedNode && // allow untagged nodes that are part of ways
+           entity.geometry(graph) !== 'vertex' && // allow untagged entities that are part of relations
+           !entity.hasParentRelations(graph)) {
+             if (Object.keys(entity.tags).length === 0) {
+               subtype = 'any';
+             } else if (!hasDescriptiveTags(entity, graph)) {
+               subtype = 'descriptive';
+             } else if (isUntypedRelation(entity)) {
+               subtype = 'relation_type';

              }
              }

+           } // flag an unknown road even if it's a member of a relation
+
+
+           if (!subtype && isUnknownRoad(entity)) {
+             subtype = 'highway_classification';

            }
            }

-         }
-       }
-       function locArray(loc) {
-         if (Array.isArray(loc)) {
-           return loc;
-         } else if (loc.coordinates) {
-           return loc.coordinates;
-         }
-         return loc.geometry.coordinates;
-       }
-       function smallestFeature(loc) {
-         var query = locArray(loc);
-         var featureProperties = whichPolygonGetter(query);
-         if (!featureProperties) { return null; }
-         return featuresByCode[featureProperties.id];
-       }
-       function countryFeature(loc) {
-         var feature = smallestFeature(loc);
-         if (!feature) { return null; }
-         var countryCode = feature.properties.country || feature.properties.iso1A2;
-         return featuresByCode[countryCode];
-       }
-       function featureForLoc(loc, opts) {
-         if (opts && opts.level && opts.level !== 'country') {
-           var features = featuresContaining(loc);
-           var targetLevel = opts.level;
-           var targetLevelIndex = levels.indexOf(targetLevel);
-           if (targetLevelIndex === -1) { return null; }
-           for (var i in features) {
-             var feature = features[i];
-             if (
-               feature.properties.level === targetLevel ||
-               levels.indexOf(feature.properties.level) > targetLevelIndex
-             ) {
-               return feature;
+
+           if (!subtype) return [];
+           var messageID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag.' + subtype;
+           var referenceID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag'; // can always delete if the user created it in the first place..
+
+           var canDelete = entity.version === undefined || entity.v !== undefined;
+           var severity = canDelete && subtype !== 'highway_classification' ? 'error' : 'warning';
+           return [new validationIssue({
+             type: type,
+             subtype: subtype,
+             severity: severity,
+             message: function message(context) {
+               var entity = context.hasEntity(this.entityIds[0]);
+               return entity ? _t.html('issues.' + messageID + '.message', {
+                 feature: utilDisplayLabel(entity, context.graph())
+               }) : '';
+             },
+             reference: showReference,
+             entityIds: [entity.id],
+             dynamicFixes: function dynamicFixes(context) {
+               var fixes = [];
+               var selectFixType = subtype === 'highway_classification' ? 'select_road_type' : 'select_preset';
+               fixes.push(new validationIssueFix({
+                 icon: 'iD-icon-search',
+                 title: _t.html('issues.fix.' + selectFixType + '.title'),
+                 onClick: function onClick(context) {
+                   context.ui().sidebar.showPresetList();
+                 }
+               }));
+               var deleteOnClick;
+               var id = this.entityIds[0];
+               var operation = operationDelete(context, [id]);
+               var disabledReasonID = operation.disabled();
+
+               if (!disabledReasonID) {
+                 deleteOnClick = function deleteOnClick(context) {
+                   var id = this.issue.entityIds[0];
+                   var operation = operationDelete(context, [id]);
+
+                   if (!operation.disabled()) {
+                     operation();
+                   }
+                 };
+               }
+
+               fixes.push(new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.delete_feature.title'),
+                 disabledReason: disabledReasonID ? _t('operations.delete.' + disabledReasonID + '.single') : undefined,
+                 onClick: deleteOnClick
+               }));
+               return fixes;

              }
              }

+           })];
+
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.' + referenceID + '.reference'));

            }
            }

-           return null;
-         }
-         return countryFeature(loc);
-       }
-       function featureForID(id) {
-         var stringID;
-         if (typeof id === 'number') {
-           stringID = id.toString();
-           if (stringID.length === 1) {
-             stringID = '00' + stringID;
-           } else if (stringID.length === 2) {
-             stringID = '0' + stringID;
-           }
-         } else {
-           stringID = id.replace(idFilterRegex, '').toUpperCase();
-         }
-         return featuresByCode[stringID] || null;
-       }
-       function smallestOrMatchingFeature(query) {
-         if (typeof query === 'object') {
-           return smallestFeature(query);
-         }
-         return featureForID(query);
-       }
-       function feature(query, opts) {
-         if (typeof query === 'object') {
-           return featureForLoc(query, opts);
-         }
-         return featureForID(query);
-       }
-       function iso1A2Code(query, opts) {
-         var match = feature(query, opts);
-         if (!match) { return null; }
-         return match.properties.iso1A2 || null;
-       }
-       function featuresContaining(query, strict) {
-         var feature = smallestOrMatchingFeature(query);
-         if (!feature) { return []; }
-         var features = [];
-         if (!strict || typeof query === 'object') {
-           features.push(feature);
-         }
-         var properties = feature.properties;
-         for (var i in properties.groups) {
-           var groupID = properties.groups[i];
-           features.push(featuresByCode[groupID]);
-         }
-         return features;
-       }
-       function roadSpeedUnit(query) {
-         var feature = smallestOrMatchingFeature(query);
-         return (feature && feature.properties.roadSpeedUnit) || null;
-       }
+         };

 
 

-       var _dataDeprecated;
-       var _nsi;
+         validation.type = type;
+         return validation;
+       }

 
        function validationOutdatedTags() {
          var type = 'outdated_tags';
 
        function validationOutdatedTags() {
          var type = 'outdated_tags';

-         var nsiKeys = ['amenity', 'shop', 'tourism', 'leisure', 'office'];
-
-         // A concern here in switching to async data means that `_dataDeprecated`
-         // and `_nsi` will not be available at first, so the data on early tiles
-         // may not have tags validated fully.
-
-         // initialize deprecated tags array
-         _mainFileFetcher.get('deprecated')
-           .then(function (d) { return _dataDeprecated = d; })
-           .catch(function () { /* ignore */ });
-
-         _mainFileFetcher.get('nsi_brands')
-           .then(function (d) {
-             _nsi = {
-               brands: d.brands,
-               matcher: matcher$1(),
-               wikidata: {},
-               wikipedia: {}
-             };
+         var _waitingForDeprecated = true;

 
 

-             // initialize name-suggestion-index matcher
-             _nsi.matcher.buildMatchIndex(d.brands);
-
-             // index all known wikipedia and wikidata tags
-             Object.keys(d.brands).forEach(function (kvnd) {
-               var brand = d.brands[kvnd];
-               var wd = brand.tags['brand:wikidata'];
-               var wp = brand.tags['brand:wikipedia'];
-               if (wd) { _nsi.wikidata[wd] = kvnd; }
-               if (wp) { _nsi.wikipedia[wp] = kvnd; }
-             });
+         var _dataDeprecated; // fetch deprecated tags

 
 

-             return _nsi;
-           })
-           .catch(function () { /* ignore */ });

 
 

+         _mainFileFetcher.get('deprecated').then(function (d) {
+           return _dataDeprecated = d;
+         })["catch"](function () {
+           /* ignore */
+         })["finally"](function () {
+           return _waitingForDeprecated = false;
+         });

 
          function oldTagIssues(entity, graph) {
 
          function oldTagIssues(entity, graph) {

-           var oldTags = Object.assign({}, entity.tags);  // shallow copy
+           var oldTags = Object.assign({}, entity.tags); // shallow copy
+

            var preset = _mainPresetIndex.match(entity, graph);
            var subtype = 'deprecated_tags';
            var preset = _mainPresetIndex.match(entity, graph);
            var subtype = 'deprecated_tags';

-           if (!preset) { return []; }
+           if (!preset) return [];
+           if (!entity.hasInterestingTags()) return []; // Upgrade preset, if a replacement is available..

 
 

-           // upgrade preset..

            if (preset.replacement) {
              var newPreset = _mainPresetIndex.item(preset.replacement);
            if (preset.replacement) {
              var newPreset = _mainPresetIndex.item(preset.replacement);

-             graph = actionChangePreset(entity.id, preset, newPreset, true /* skip field defaults */)(graph);
+             graph = actionChangePreset(entity.id, preset, newPreset, true
+             /* skip field defaults */
+             )(graph);

              entity = graph.entity(entity.id);
              preset = newPreset;
              entity = graph.entity(entity.id);
              preset = newPreset;

-           }
+           } // Upgrade deprecated tags..
+

 
 

-           // upgrade tags..

            if (_dataDeprecated) {
              var deprecatedTags = entity.deprecatedTags(_dataDeprecated);
            if (_dataDeprecated) {
              var deprecatedTags = entity.deprecatedTags(_dataDeprecated);

+

              if (deprecatedTags.length) {
                deprecatedTags.forEach(function (tag) {
                  graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
                });
                entity = graph.entity(entity.id);
              }
              if (deprecatedTags.length) {
                deprecatedTags.forEach(function (tag) {
                  graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
                });
                entity = graph.entity(entity.id);
              }

-           }
+           } // Add missing addTags from the detected preset
+
+
+           var newTags = Object.assign({}, entity.tags); // shallow copy

 
 

-           // add missing addTags..
-           var newTags = Object.assign({}, entity.tags);  // shallow copy

            if (preset.tags !== preset.addTags) {
              Object.keys(preset.addTags).forEach(function (k) {
                if (!newTags[k]) {
            if (preset.tags !== preset.addTags) {
              Object.keys(preset.addTags).forEach(function (k) {
                if (!newTags[k]) {


@@ -60765,110 +58596,85 @@
                  }
                }
              });
                  }
                }
              });

-           }
-
-           if (_nsi) {
-             // Do `wikidata` or `wikipedia` identify this entity as a brand?  #6416
-             // If so, these tags can be swapped to `brand:wikidata`/`brand:wikipedia`
-             var isBrand;
-             if (newTags.wikidata) {                 // try matching `wikidata`
-               isBrand = _nsi.wikidata[newTags.wikidata];
-             }
-             if (!isBrand && newTags.wikipedia) {    // fallback to `wikipedia`
-               isBrand = _nsi.wikipedia[newTags.wikipedia];
-             }
-             if (isBrand && !newTags.office) {       // but avoid doing this for corporate offices
-               if (newTags.wikidata) {
-                 newTags['brand:wikidata'] = newTags.wikidata;
-                 delete newTags.wikidata;
-               }
-               if (newTags.wikipedia) {
-                 newTags['brand:wikipedia'] = newTags.wikipedia;
-                 delete newTags.wikipedia;
-               }
-               // I considered setting `name` and other tags here, but they aren't unique per wikidata
-               // (Q2759586 -> in USA "Papa John's", in Russia "Папа Джонс")
-               // So users will really need to use a preset or assign `name` themselves.
-             }
+           } // Attempt to match a canonical record in the name-suggestion-index.

 
 

-             // try key/value|name match against name-suggestion-index
-             if (newTags.name) {
-               for (var i = 0; i < nsiKeys.length; i++) {
-                 var k = nsiKeys[i];
-                 if (!newTags[k]) { continue; }

 
 

-                 var center = entity.extent(graph).center();
-                 var countryCode = iso1A2Code(center);
-                 var match = _nsi.matcher.matchKVN(k, newTags[k], newTags.name, countryCode && countryCode.toLowerCase());
-                 if (!match) { continue; }
+           var nsi = services.nsi;
+           var waitingForNsi = false;
+           var nsiResult;

 
 

-                 // for now skip ambiguous matches (like Target~(USA) vs Target~(Australia))
-                 if (match.d) { continue; }
+           if (nsi) {
+             waitingForNsi = nsi.status() === 'loading';

 
 

-                 var brand = _nsi.brands[match.kvnd];
-                 if (brand && brand.tags['brand:wikidata'] &&
-                   brand.tags['brand:wikidata'] !== entity.tags['not:brand:wikidata']) {
-                   subtype = 'noncanonical_brand';
+             if (!waitingForNsi) {
+               var loc = entity.extent(graph).center();
+               nsiResult = nsi.upgradeTags(newTags, loc);

 
 

-                   var keepTags = ['takeaway'].reduce(function (acc, k) {
-                     if (newTags[k]) {
-                       acc[k] = newTags[k];
-                     }
-                     return acc;
-                   }, {});
-
-                   nsiKeys.forEach(function (k) { return delete newTags[k]; });
-                   Object.assign(newTags, brand.tags, keepTags);
-                   break;
-                 }
+               if (nsiResult) {
+                 newTags = nsiResult.newTags;
+                 subtype = 'noncanonical_brand';

                }
              }
            }
 
                }
              }
            }
 

-           // determine diff
-           var tagDiff = utilTagDiff(oldTags, newTags);
-           if (!tagDiff.length) { return []; }
-
-           var isOnlyAddingTags = tagDiff.every(function (d) { return d.type === '+'; });
+           var issues = [];
+           issues.provisional = _waitingForDeprecated || waitingForNsi; // determine diff

 
 

+           var tagDiff = utilTagDiff(oldTags, newTags);
+           if (!tagDiff.length) return issues;
+           var isOnlyAddingTags = tagDiff.every(function (d) {
+             return d.type === '+';
+           });

            var prefix = '';
            var prefix = '';

-           if (subtype === 'noncanonical_brand') {
+
+           if (nsiResult) {

              prefix = 'noncanonical_brand.';
            } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
              subtype = 'incomplete_tags';
              prefix = 'incomplete.';
              prefix = 'noncanonical_brand.';
            } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
              subtype = 'incomplete_tags';
              prefix = 'incomplete.';

-           }
+           } // don't allow autofixing brand tags

 
 

-           // don't allow autofixing brand tags
-           var autoArgs = subtype !== 'noncanonical_brand' ? [doUpgrade, _t('issues.fix.upgrade_tags.annotation')] : null;

 
 

-           return [new validationIssue({
+           var autoArgs = subtype !== 'noncanonical_brand' ? [doUpgrade, _t('issues.fix.upgrade_tags.annotation')] : null;
+           issues.push(new validationIssue({

              type: type,
              subtype: subtype,
              severity: 'warning',
              message: showMessage,
              reference: showReference,
              entityIds: [entity.id],
              type: type,
              subtype: subtype,
              severity: 'warning',
              message: showMessage,
              reference: showReference,
              entityIds: [entity.id],

-             hash: JSON.stringify(tagDiff),
-             dynamicFixes: function () {
-               return [
-                 new validationIssueFix({
-                   autoArgs: autoArgs,
-                   title: _t('issues.fix.upgrade_tags.title'),
-                   onClick: function (context) {
-                     context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
+             hash: utilHashcode(JSON.stringify(tagDiff)),
+             dynamicFixes: function dynamicFixes() {
+               var fixes = [new validationIssueFix({
+                 autoArgs: autoArgs,
+                 title: _t.html('issues.fix.upgrade_tags.title'),
+                 onClick: function onClick(context) {
+                   context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
+                 }
+               })];
+               var item = nsiResult && nsiResult.matched;
+
+               if (item) {
+                 fixes.push(new validationIssueFix({
+                   title: _t.html('issues.fix.tag_as_not.title', {
+                     name: item.displayName
+                   }),
+                   onClick: function onClick(context) {
+                     context.perform(addNotTag, _t('issues.fix.tag_as_not.annotation'));

                    }
                    }

-                 })
-               ];
-             }
-           })];
+                 }));
+               }

 
 

+               return fixes;
+             }
+           }));
+           return issues;

 
            function doUpgrade(graph) {
              var currEntity = graph.hasEntity(entity.id);
 
            function doUpgrade(graph) {
              var currEntity = graph.hasEntity(entity.id);

-             if (!currEntity) { return graph; }
+             if (!currEntity) return graph;
+             var newTags = Object.assign({}, currEntity.tags); // shallow copy

 
 

-             var newTags = Object.assign({}, currEntity.tags);  // shallow copy

              tagDiff.forEach(function (diff) {
                if (diff.type === '-') {
                  delete newTags[diff.key];
              tagDiff.forEach(function (diff) {
                if (diff.type === '-') {
                  delete newTags[diff.key];


@@ -60876,57 +58682,66 @@
                  newTags[diff.key] = diff.newVal;
                }
              });
                  newTags[diff.key] = diff.newVal;
                }
              });

+             return actionChangeTags(currEntity.id, newTags)(graph);
+           }
+
+           function addNotTag(graph) {
+             var currEntity = graph.hasEntity(entity.id);
+             if (!currEntity) return graph;
+             var item = nsiResult && nsiResult.matched;
+             if (!item) return graph;
+             var newTags = Object.assign({}, currEntity.tags); // shallow copy
+
+             var wd = item.mainTag; // e.g. `brand:wikidata`
+
+             var notwd = "not:".concat(wd); // e.g. `not:brand:wikidata`
+
+             var qid = item.tags[wd];
+             newTags[notwd] = qid;
+
+             if (newTags[wd] === qid) {
+               // if `brand:wikidata` was set to that qid
+               var wp = item.mainTag.replace('wikidata', 'wikipedia');
+               delete newTags[wd]; // remove `brand:wikidata`
+
+               delete newTags[wp]; // remove `brand:wikipedia`
+             }

 
              return actionChangeTags(currEntity.id, newTags)(graph);
            }
 
 
              return actionChangeTags(currEntity.id, newTags)(graph);
            }
 

-

            function showMessage(context) {
              var currEntity = context.hasEntity(entity.id);
            function showMessage(context) {
              var currEntity = context.hasEntity(entity.id);

-             if (!currEntity) { return ''; }
+             if (!currEntity) return '';
+             var messageID = "issues.outdated_tags.".concat(prefix, "message");

 
 

-             var messageID = "issues.outdated_tags." + prefix + "message";

              if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
                messageID += '_incomplete';
              }
              if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
                messageID += '_incomplete';
              }

-             return _t(messageID, { feature: utilDisplayLabel(currEntity, context.graph()) });
-           }

 
 

+             return _t.html(messageID, {
+               feature: utilDisplayLabel(currEntity, context.graph(), true
+               /* verbose */
+               )
+             });
+           }

 
            function showReference(selection) {
 
            function showReference(selection) {

-             var enter = selection.selectAll('.issue-reference')
-               .data([0])
-               .enter();
-
-             enter
-               .append('div')
-               .attr('class', 'issue-reference')
-               .text(_t(("issues.outdated_tags." + prefix + "reference")));
-
-             enter
-               .append('strong')
-               .text(_t('issues.suggested'));
-
-             enter
-               .append('table')
-               .attr('class', 'tagDiff-table')
-               .selectAll('.tagDiff-row')
-               .data(tagDiff)
-               .enter()
-               .append('tr')
-               .attr('class', 'tagDiff-row')
-               .append('td')
-               .attr('class', function (d) {
-                 var klass = d.type === '+' ? 'add' : 'remove';
-                 return ("tagDiff-cell tagDiff-cell-" + klass);
-               })
-               .text(function (d) { return d.display; });
+             var enter = selection.selectAll('.issue-reference').data([0]).enter();
+             enter.append('div').attr('class', 'issue-reference').html(_t.html("issues.outdated_tags.".concat(prefix, "reference")));
+             enter.append('strong').html(_t.html('issues.suggested'));
+             enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
+               var klass = d.type === '+' ? 'add' : 'remove';
+               return "tagDiff-cell tagDiff-cell-".concat(klass);
+             }).html(function (d) {
+               return d.display;
+             });

            }
          }
 
            }
          }
 

-

          function oldMultipolygonIssues(entity, graph) {
            var multipolygon, outerWay;
          function oldMultipolygonIssues(entity, graph) {
            var multipolygon, outerWay;

+

            if (entity.type === 'relation') {
              outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
              multipolygon = entity;
            if (entity.type === 'relation') {
              outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
              multipolygon = entity;


@@ -60937,8 +58752,7 @@
              return [];
            }
 
              return [];
            }
 

-           if (!multipolygon || !outerWay) { return []; }
-
+           if (!multipolygon || !outerWay) return [];

            return [new validationIssue({
              type: type,
              subtype: 'old_multipolygon',
            return [new validationIssue({
              type: type,
              subtype: 'old_multipolygon',


@@ -60946,247 +58760,196 @@
              message: showMessage,
              reference: showReference,
              entityIds: [outerWay.id, multipolygon.id],
              message: showMessage,
              reference: showReference,
              entityIds: [outerWay.id, multipolygon.id],

-             dynamicFixes: function () {
-               return [
-                 new validationIssueFix({
-                   autoArgs: [doUpgrade, _t('issues.fix.move_tags.annotation')],
-                   title: _t('issues.fix.move_tags.title'),
-                   onClick: function (context) {
-                     context.perform(doUpgrade, _t('issues.fix.move_tags.annotation'));
-                   }
-                 })
-               ];
+             dynamicFixes: function dynamicFixes() {
+               return [new validationIssueFix({
+                 autoArgs: [doUpgrade, _t('issues.fix.move_tags.annotation')],
+                 title: _t.html('issues.fix.move_tags.title'),
+                 onClick: function onClick(context) {
+                   context.perform(doUpgrade, _t('issues.fix.move_tags.annotation'));
+                 }
+               })];

              }
            })];
 
              }
            })];
 

-

            function doUpgrade(graph) {
              var currMultipolygon = graph.hasEntity(multipolygon.id);
              var currOuterWay = graph.hasEntity(outerWay.id);
            function doUpgrade(graph) {
              var currMultipolygon = graph.hasEntity(multipolygon.id);
              var currOuterWay = graph.hasEntity(outerWay.id);

-             if (!currMultipolygon || !currOuterWay) { return graph; }
-
+             if (!currMultipolygon || !currOuterWay) return graph;

              currMultipolygon = currMultipolygon.mergeTags(currOuterWay.tags);
              graph = graph.replace(currMultipolygon);
              return actionChangeTags(currOuterWay.id, {})(graph);
            }
 
              currMultipolygon = currMultipolygon.mergeTags(currOuterWay.tags);
              graph = graph.replace(currMultipolygon);
              return actionChangeTags(currOuterWay.id, {})(graph);
            }
 

-

            function showMessage(context) {
              var currMultipolygon = context.hasEntity(multipolygon.id);
            function showMessage(context) {
              var currMultipolygon = context.hasEntity(multipolygon.id);

-             if (!currMultipolygon) { return ''; }
-
-             return _t('issues.old_multipolygon.message',
-                 { multipolygon: utilDisplayLabel(currMultipolygon, context.graph()) }
-             );
+             if (!currMultipolygon) return '';
+             return _t.html('issues.old_multipolygon.message', {
+               multipolygon: utilDisplayLabel(currMultipolygon, context.graph(), true
+               /* verbose */
+               )
+             });

            }
 
            }
 

-

            function showReference(selection) {
            function showReference(selection) {

-             selection.selectAll('.issue-reference')
-               .data([0])
-               .enter()
-               .append('div')
-               .attr('class', 'issue-reference')
-               .text(_t('issues.old_multipolygon.reference'));
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.old_multipolygon.reference'));

            }
          }
 
            }
          }
 

-

          var validation = function checkOutdatedTags(entity, graph) {
            var issues = oldMultipolygonIssues(entity, graph);
          var validation = function checkOutdatedTags(entity, graph) {
            var issues = oldMultipolygonIssues(entity, graph);

-           if (!issues.length) { issues = oldTagIssues(entity, graph); }
+           if (!issues.length) issues = oldTagIssues(entity, graph);

            return issues;
          };
 
            return issues;
          };
 

-

          validation.type = type;
          validation.type = type;

-

          return validation;
        }
 
        function validationPrivateData() {
          return validation;
        }
 
        function validationPrivateData() {

-           var type = 'private_data';
-
-           // assume that some buildings are private
-           var privateBuildingValues = {
-               detached: true,
-               farm: true,
-               house: true,
-               houseboat: true,
-               residential: true,
-               semidetached_house: true,
-               static_caravan: true
-           };
-
-           // but they might be public if they have one of these other tags
-           var publicKeys = {
-               amenity: true,
-               craft: true,
-               historic: true,
-               leisure: true,
-               office: true,
-               shop: true,
-               tourism: true
-           };
-
-           // these tags may contain personally identifying info
-           var personalTags = {
-               'contact:email': true,
-               'contact:fax': true,
-               'contact:phone': true,
-               email: true,
-               fax: true,
-               phone: true
-           };
-
-
-           var validation = function checkPrivateData(entity) {
-               var tags = entity.tags;
-               if (!tags.building || !privateBuildingValues[tags.building]) { return []; }
-
-               var keepTags = {};
-               for (var k in tags) {
-                   if (publicKeys[k]) { return []; }  // probably a public feature
-                   if (!personalTags[k]) {
-                       keepTags[k] = tags[k];
-                   }
-               }
+         var type = 'private_data'; // assume that some buildings are private
+
+         var privateBuildingValues = {
+           detached: true,
+           farm: true,
+           house: true,
+           houseboat: true,
+           residential: true,
+           semidetached_house: true,
+           static_caravan: true
+         }; // but they might be public if they have one of these other tags
+
+         var publicKeys = {
+           amenity: true,
+           craft: true,
+           historic: true,
+           leisure: true,
+           office: true,
+           shop: true,
+           tourism: true
+         }; // these tags may contain personally identifying info
+
+         var personalTags = {
+           'contact:email': true,
+           'contact:fax': true,
+           'contact:phone': true,
+           email: true,
+           fax: true,
+           phone: true
+         };
+
+         var validation = function checkPrivateData(entity) {
+           var tags = entity.tags;
+           if (!tags.building || !privateBuildingValues[tags.building]) return [];
+           var keepTags = {};

 
 

-               var tagDiff = utilTagDiff(tags, keepTags);
-               if (!tagDiff.length) { return []; }
+           for (var k in tags) {
+             if (publicKeys[k]) return []; // probably a public feature

 
 

-               var fixID = tagDiff.length === 1 ? 'remove_tag' : 'remove_tags';
+             if (!personalTags[k]) {
+               keepTags[k] = tags[k];
+             }
+           }

 
 

-               return [new validationIssue({
-                   type: type,
-                   severity: 'warning',
-                   message: showMessage,
-                   reference: showReference,
-                   entityIds: [entity.id],
-                   dynamicFixes: function() {
-                       return [
-                           new validationIssueFix({
-                               icon: 'iD-operation-delete',
-                               title: _t('issues.fix.' + fixID + '.title'),
-                               onClick: function(context) {
-                                   context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
-                               }
-                           })
-                       ];
-                   }
+           var tagDiff = utilTagDiff(tags, keepTags);
+           if (!tagDiff.length) return [];
+           var fixID = tagDiff.length === 1 ? 'remove_tag' : 'remove_tags';
+           return [new validationIssue({
+             type: type,
+             severity: 'warning',
+             message: showMessage,
+             reference: showReference,
+             entityIds: [entity.id],
+             dynamicFixes: function dynamicFixes() {
+               return [new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.' + fixID + '.title'),
+                 onClick: function onClick(context) {
+                   context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
+                 }

                })];
                })];

+             }
+           })];

 
 

+           function doUpgrade(graph) {
+             var currEntity = graph.hasEntity(entity.id);
+             if (!currEntity) return graph;
+             var newTags = Object.assign({}, currEntity.tags); // shallow copy

 
 

-               function doUpgrade(graph) {
-                   var currEntity = graph.hasEntity(entity.id);
-                   if (!currEntity) { return graph; }
-
-                   var newTags = Object.assign({}, currEntity.tags);  // shallow copy
-                   tagDiff.forEach(function(diff) {
-                       if (diff.type === '-') {
-                           delete newTags[diff.key];
-                       } else if (diff.type === '+') {
-                           newTags[diff.key] = diff.newVal;
-                       }
-                   });
-
-                   return actionChangeTags(currEntity.id, newTags)(graph);
-               }
-
-
-               function showMessage(context) {
-                   var currEntity = context.hasEntity(this.entityIds[0]);
-                   if (!currEntity) { return ''; }
-
-                   return _t('issues.private_data.contact.message',
-                       { feature: utilDisplayLabel(currEntity, context.graph()) }
-                   );
-               }
-
-
-               function showReference(selection) {
-                   var enter = selection.selectAll('.issue-reference')
-                       .data([0])
-                       .enter();
-
-                   enter
-                       .append('div')
-                       .attr('class', 'issue-reference')
-                       .text(_t('issues.private_data.reference'));
-
-                   enter
-                       .append('strong')
-                       .text(_t('issues.suggested'));
-
-                   enter
-                       .append('table')
-                       .attr('class', 'tagDiff-table')
-                       .selectAll('.tagDiff-row')
-                       .data(tagDiff)
-                       .enter()
-                       .append('tr')
-                       .attr('class', 'tagDiff-row')
-                       .append('td')
-                       .attr('class', function(d) {
-                           var klass = d.type === '+' ? 'add' : 'remove';
-                           return 'tagDiff-cell tagDiff-cell-' + klass;
-                       })
-                       .text(function(d) { return d.display; });
+             tagDiff.forEach(function (diff) {
+               if (diff.type === '-') {
+                 delete newTags[diff.key];
+               } else if (diff.type === '+') {
+                 newTags[diff.key] = diff.newVal;

                }
                }

-           };
+             });
+             return actionChangeTags(currEntity.id, newTags)(graph);
+           }

 
 

+           function showMessage(context) {
+             var currEntity = context.hasEntity(this.entityIds[0]);
+             if (!currEntity) return '';
+             return _t.html('issues.private_data.contact.message', {
+               feature: utilDisplayLabel(currEntity, context.graph())
+             });
+           }

 
 

-           validation.type = type;
+           function showReference(selection) {
+             var enter = selection.selectAll('.issue-reference').data([0]).enter();
+             enter.append('div').attr('class', 'issue-reference').html(_t.html('issues.private_data.reference'));
+             enter.append('strong').html(_t.html('issues.suggested'));
+             enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
+               var klass = d.type === '+' ? 'add' : 'remove';
+               return 'tagDiff-cell tagDiff-cell-' + klass;
+             }).html(function (d) {
+               return d.display;
+             });
+           }
+         };

 
 

-           return validation;
+         validation.type = type;
+         return validation;

        }
 
        }
 

-       var _discardNameRegexes = [];
-

        function validationSuspiciousName() {
          var type = 'suspicious_name';
        function validationSuspiciousName() {
          var type = 'suspicious_name';

-         var keysToTestForGenericValues = [
-           'aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway',
-           'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway'
-         ];
+         var keysToTestForGenericValues = ['aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway', 'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway'];
+         var _waitingForNsi = false; // Attempt to match a generic record in the name-suggestion-index.

 
 

-         // A concern here in switching to async data means that `_nsiFilters` will not
-         // be available at first, so the data on early tiles may not have tags validated fully.
+         function isGenericMatchInNsi(tags) {
+           var nsi = services.nsi;

 
 

-         _mainFileFetcher.get('nsi_filters')
-           .then(function (filters) {
-             // known list of generic names (e.g. "bar")
-             _discardNameRegexes = filters.discardNames
-               .map(function (discardName) { return new RegExp(discardName, 'i'); });
-           })
-           .catch(function () { /* ignore */ });
+           if (nsi) {
+             _waitingForNsi = nsi.status() === 'loading';

 
 

+             if (!_waitingForNsi) {
+               return nsi.isGenericName(tags);
+             }
+           }
+
+           return false;
+         } // Test if the name is just the key or tag value (e.g. "park")

 
 

-         function isDiscardedSuggestionName(lowercaseName) {
-           return _discardNameRegexes.some(function (regex) { return regex.test(lowercaseName); });
-         }

 
 

-         // test if the name is just the key or tag value (e.g. "park")

          function nameMatchesRawTag(lowercaseName, tags) {
            for (var i = 0; i < keysToTestForGenericValues.length; i++) {
              var key = keysToTestForGenericValues[i];
              var val = tags[key];
          function nameMatchesRawTag(lowercaseName, tags) {
            for (var i = 0; i < keysToTestForGenericValues.length; i++) {
              var key = keysToTestForGenericValues[i];
              var val = tags[key];

+

              if (val) {
                val = val.toLowerCase();
              if (val) {
                val = val.toLowerCase();

-               if (key === lowercaseName ||
-                 val === lowercaseName ||
-                 key.replace(/\_/g, ' ') === lowercaseName ||
-                 val.replace(/\_/g, ' ') === lowercaseName) {
+
+               if (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {

                  return true;
                }
              }
            }
                  return true;
                }
              }
            }

+

            return false;
          }
 
          function isGenericName(name, tags) {
            name = name.toLowerCase();
            return false;
          }
 
          function isGenericName(name, tags) {
            name = name.toLowerCase();

-           return nameMatchesRawTag(name, tags) || isDiscardedSuggestionName(name);
+           return nameMatchesRawTag(name, tags) || isGenericMatchInNsi(tags);

          }
 
          function makeGenericNameIssue(entityId, nameKey, genericName, langCode) {
          }
 
          function makeGenericNameIssue(entityId, nameKey, genericName, langCode) {


@@ -61194,44 +58957,38 @@
              type: type,
              subtype: 'generic_name',
              severity: 'warning',
              type: type,
              subtype: 'generic_name',
              severity: 'warning',

-             message: function(context) {
+             message: function message(context) {

                var entity = context.hasEntity(this.entityIds[0]);
                var entity = context.hasEntity(this.entityIds[0]);

-               if (!entity) { return ''; }
+               if (!entity) return '';

                var preset = _mainPresetIndex.match(entity, context.graph());
                var langName = langCode && _mainLocalizer.languageName(langCode);
                var preset = _mainPresetIndex.match(entity, context.graph());
                var langName = langCode && _mainLocalizer.languageName(langCode);

-               return _t('issues.generic_name.message' + (langName ? '_language' : ''),
-                 { feature: preset.name(), name: genericName, language: langName }
-               );
+               return _t.html('issues.generic_name.message' + (langName ? '_language' : ''), {
+                 feature: preset.name(),
+                 name: genericName,
+                 language: langName
+               });

              },
              reference: showReference,
              entityIds: [entityId],
              },
              reference: showReference,
              entityIds: [entityId],

-             hash: nameKey + '=' + genericName,
-             dynamicFixes: function() {
-               return [
-                 new validationIssueFix({
-                   icon: 'iD-operation-delete',
-                   title: _t('issues.fix.remove_the_name.title'),
-                   onClick: function(context) {
-                     var entityId = this.issue.entityIds[0];
-                     var entity = context.entity(entityId);
-                     var tags = Object.assign({}, entity.tags);   // shallow copy
-                     delete tags[nameKey];
-                     context.perform(
-                       actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation')
-                     );
-                   }
-                 })
-               ];
+             hash: "".concat(nameKey, "=").concat(genericName),
+             dynamicFixes: function dynamicFixes() {
+               return [new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.remove_the_name.title'),
+                 onClick: function onClick(context) {
+                   var entityId = this.issue.entityIds[0];
+                   var entity = context.entity(entityId);
+                   var tags = Object.assign({}, entity.tags); // shallow copy
+
+                   delete tags[nameKey];
+                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation'));
+                 }
+               })];

              }
            });
 
            function showReference(selection) {
              }
            });
 
            function showReference(selection) {

-             selection.selectAll('.issue-reference')
-               .data([0])
-               .enter()
-               .append('div')
-               .attr('class', 'issue-reference')
-               .text(_t('issues.generic_name.reference'));
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));

            }
          }
 
            }
          }
 


@@ -61240,71 +58997,69 @@
              type: type,
              subtype: 'not_name',
              severity: 'warning',
              type: type,
              subtype: 'not_name',
              severity: 'warning',

-             message: function(context) {
+             message: function message(context) {

                var entity = context.hasEntity(this.entityIds[0]);
                var entity = context.hasEntity(this.entityIds[0]);

-               if (!entity) { return ''; }
+               if (!entity) return '';

                var preset = _mainPresetIndex.match(entity, context.graph());
                var langName = langCode && _mainLocalizer.languageName(langCode);
                var preset = _mainPresetIndex.match(entity, context.graph());
                var langName = langCode && _mainLocalizer.languageName(langCode);

-               return _t('issues.incorrect_name.message' + (langName ? '_language' : ''),
-                 { feature: preset.name(), name: incorrectName, language: langName }
-               );
+               return _t.html('issues.incorrect_name.message' + (langName ? '_language' : ''), {
+                 feature: preset.name(),
+                 name: incorrectName,
+                 language: langName
+               });

              },
              reference: showReference,
              entityIds: [entityId],
              },
              reference: showReference,
              entityIds: [entityId],

-             hash: nameKey + '=' + incorrectName,
-             dynamicFixes: function() {
-               return [
-                 new validationIssueFix({
-                   icon: 'iD-operation-delete',
-                   title: _t('issues.fix.remove_the_name.title'),
-                   onClick: function(context) {
-                     var entityId = this.issue.entityIds[0];
-                     var entity = context.entity(entityId);
-                     var tags = Object.assign({}, entity.tags);   // shallow copy
-                     delete tags[nameKey];
-                     context.perform(
-                       actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation')
-                     );
-                   }
-                 })
-               ];
+             hash: "".concat(nameKey, "=").concat(incorrectName),
+             dynamicFixes: function dynamicFixes() {
+               return [new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.remove_the_name.title'),
+                 onClick: function onClick(context) {
+                   var entityId = this.issue.entityIds[0];
+                   var entity = context.entity(entityId);
+                   var tags = Object.assign({}, entity.tags); // shallow copy
+
+                   delete tags[nameKey];
+                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation'));
+                 }
+               })];

              }
            });
 
            function showReference(selection) {
              }
            });
 
            function showReference(selection) {

-             selection.selectAll('.issue-reference')
-               .data([0])
-               .enter()
-               .append('div')
-               .attr('class', 'issue-reference')
-               .text(_t('issues.generic_name.reference'));
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));

            }
          }
 
            }
          }
 

-

          var validation = function checkGenericName(entity) {
          var validation = function checkGenericName(entity) {

-           // a generic name is okay if it's a known brand or entity
-           if (entity.hasWikidata()) { return []; }
+           var tags = entity.tags; // a generic name is allowed if it's a known brand or entity

 
 

+           var hasWikidata = !!tags.wikidata || !!tags['brand:wikidata'] || !!tags['operator:wikidata'];
+           if (hasWikidata) return [];

            var issues = [];
            var issues = [];

-           var notNames = (entity.tags['not:name'] || '').split(';');
+           var notNames = (tags['not:name'] || '').split(';');

 
 

-           for (var key in entity.tags) {
+           for (var key in tags) {

              var m = key.match(/^name(?:(?::)([a-zA-Z_-]+))?$/);
              var m = key.match(/^name(?:(?::)([a-zA-Z_-]+))?$/);

-             if (!m) { continue; }
-
+             if (!m) continue;

              var langCode = m.length >= 2 ? m[1] : null;
              var langCode = m.length >= 2 ? m[1] : null;

-             var value = entity.tags[key];
+             var value = tags[key];
+

              if (notNames.length) {
                for (var i in notNames) {
                  var notName = notNames[i];
              if (notNames.length) {
                for (var i in notNames) {
                  var notName = notNames[i];

+

                  if (notName && value === notName) {
                    issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
                    continue;
                  }
                }
              }
                  if (notName && value === notName) {
                    issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
                    continue;
                  }
                }
              }

-             if (isGenericName(value, entity.tags)) {
+
+             if (isGenericName(value, tags)) {
+               issues.provisional = _waitingForNsi; // retry later if we are waiting on NSI to finish loading
+

                issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
              }
            }
                issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
              }
            }


@@ -61312,119 +59067,126 @@
            return issues;
          };
 
            return issues;
          };
 

-

          validation.type = type;
          validation.type = type;

-

          return validation;
        }
 
        function validationUnsquareWay(context) {
          return validation;
        }
 
        function validationUnsquareWay(context) {

-           var type = 'unsquare_way';
-           var DEFAULT_DEG_THRESHOLD = 5;   // see also issues.js
-
-           // use looser epsilon for detection to reduce warnings of buildings that are essentially square already
-           var epsilon = 0.05;
-           var nodeThreshold = 10;
+         var type = 'unsquare_way';
+         var DEFAULT_DEG_THRESHOLD = 5; // see also issues.js
+         // use looser epsilon for detection to reduce warnings of buildings that are essentially square already

 
 

-           function isBuilding(entity, graph) {
-               if (entity.type !== 'way' || entity.geometry(graph) !== 'area') { return false; }
-               return entity.tags.building && entity.tags.building !== 'no';
-           }
+         var epsilon = 0.05;
+         var nodeThreshold = 10;

 
 

+         function isBuilding(entity, graph) {
+           if (entity.type !== 'way' || entity.geometry(graph) !== 'area') return false;
+           return entity.tags.building && entity.tags.building !== 'no';
+         }

 
 

-           var validation = function checkUnsquareWay(entity, graph) {
+         var validation = function checkUnsquareWay(entity, graph) {
+           if (!isBuilding(entity, graph)) return []; // don't flag ways marked as physically unsquare

 
 

-               if (!isBuilding(entity, graph)) { return []; }
+           if (entity.tags.nonsquare === 'yes') return [];
+           var isClosed = entity.isClosed();
+           if (!isClosed) return []; // this building has bigger problems
+           // don't flag ways with lots of nodes since they are likely detail-mapped

 
 

-               // don't flag ways marked as physically unsquare
-               if (entity.tags.nonsquare === 'yes') { return []; }
+           var nodes = graph.childNodes(entity).slice(); // shallow copy

 
 

-               var isClosed = entity.isClosed();
-               if (!isClosed) { return []; }        // this building has bigger problems
+           if (nodes.length > nodeThreshold + 1) return []; // +1 because closing node appears twice
+           // ignore if not all nodes are fully downloaded

 
 

-               // don't flag ways with lots of nodes since they are likely detail-mapped
-               var nodes = graph.childNodes(entity).slice();    // shallow copy
-               if (nodes.length > nodeThreshold + 1) { return []; }   // +1 because closing node appears twice
+           var osm = services.osm;
+           if (!osm || nodes.some(function (node) {
+             return !osm.isDataLoaded(node.loc);
+           })) return []; // don't flag connected ways to avoid unresolvable unsquare loops

 
 

-               // ignore if not all nodes are fully downloaded
-               var osm = services.osm;
-               if (!osm || nodes.some(function(node) { return !osm.isDataLoaded(node.loc); })) { return []; }
-
-               // don't flag connected ways to avoid unresolvable unsquare loops
-               var hasConnectedSquarableWays = nodes.some(function(node) {
-                   return graph.parentWays(node).some(function(way) {
-                       if (way.id === entity.id) { return false; }
-                       if (isBuilding(way, graph)) { return true; }
-                       return graph.parentRelations(way).some(function(parentRelation) {
-                           return parentRelation.isMultipolygon() &&
-                               parentRelation.tags.building &&
-                               parentRelation.tags.building !== 'no';
-                       });
-                   });
+           var hasConnectedSquarableWays = nodes.some(function (node) {
+             return graph.parentWays(node).some(function (way) {
+               if (way.id === entity.id) return false;
+               if (isBuilding(way, graph)) return true;
+               return graph.parentRelations(way).some(function (parentRelation) {
+                 return parentRelation.isMultipolygon() && parentRelation.tags.building && parentRelation.tags.building !== 'no';

                });
                });

-               if (hasConnectedSquarableWays) { return []; }
-
+             });
+           });
+           if (hasConnectedSquarableWays) return []; // user-configurable square threshold

 
 

-               // user-configurable square threshold
-               var storedDegreeThreshold = corePreferences('validate-square-degrees');
-               var degreeThreshold = isNaN(storedDegreeThreshold) ? DEFAULT_DEG_THRESHOLD : parseFloat(storedDegreeThreshold);
+           var storedDegreeThreshold = corePreferences('validate-square-degrees');
+           var degreeThreshold = isNaN(storedDegreeThreshold) ? DEFAULT_DEG_THRESHOLD : parseFloat(storedDegreeThreshold);
+           var points = nodes.map(function (node) {
+             return context.projection(node.loc);
+           });
+           if (!geoOrthoCanOrthogonalize(points, isClosed, epsilon, degreeThreshold, true)) return [];
+           var autoArgs; // don't allow autosquaring features linked to wikidata

 
 

-               var points = nodes.map(function(node) { return context.projection(node.loc); });
-               if (!geoOrthoCanOrthogonalize(points, isClosed, epsilon, degreeThreshold, true)) { return []; }
+           if (!entity.tags.wikidata) {
+             // use same degree threshold as for detection
+             var autoAction = actionOrthogonalize(entity.id, context.projection, undefined, degreeThreshold);
+             autoAction.transitionable = false; // when autofixing, do it instantly

 
 

-               var autoArgs;
-               // don't allow autosquaring features linked to wikidata
-               if (!entity.tags.wikidata) {
-                   // use same degree threshold as for detection
-                   var autoAction = actionOrthogonalize(entity.id, context.projection, undefined, degreeThreshold);
-                   autoAction.transitionable = false;  // when autofixing, do it instantly
-                   autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature.single')];
-               }
+             autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature', {
+               n: 1
+             })];
+           }

 
 

-               return [new validationIssue({
-                   type: type,
-                   subtype: 'building',
-                   severity: 'warning',
-                   message: function(context) {
-                       var entity = context.hasEntity(this.entityIds[0]);
-                       return entity ? _t('issues.unsquare_way.message', { feature: utilDisplayLabel(entity, context.graph()) }) : '';
-                   },
-                   reference: showReference,
-                   entityIds: [entity.id],
-                   hash: JSON.stringify(autoArgs !== undefined) + degreeThreshold,
-                   dynamicFixes: function() {
-                       return [
-                           new validationIssueFix({
-                               icon: 'iD-operation-orthogonalize',
-                               title: _t('issues.fix.square_feature.title'),
-                               autoArgs: autoArgs,
-                               onClick: function(context, completionHandler) {
-                                   var entityId = this.issue.entityIds[0];
-                                   // use same degree threshold as for detection
-                                   context.perform(
-                                       actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold),
-                                       _t('operations.orthogonalize.annotation.feature.single')
-                                   );
-                                   // run after the squaring transition (currently 150ms)
-                                   window.setTimeout(function() { completionHandler(); }, 175);
-                               }
-                           }) ];
+           return [new validationIssue({
+             type: type,
+             subtype: 'building',
+             severity: 'warning',
+             message: function message(context) {
+               var entity = context.hasEntity(this.entityIds[0]);
+               return entity ? _t.html('issues.unsquare_way.message', {
+                 feature: utilDisplayLabel(entity, context.graph())
+               }) : '';
+             },
+             reference: showReference,
+             entityIds: [entity.id],
+             hash: degreeThreshold,
+             dynamicFixes: function dynamicFixes() {
+               return [new validationIssueFix({
+                 icon: 'iD-operation-orthogonalize',
+                 title: _t.html('issues.fix.square_feature.title'),
+                 autoArgs: autoArgs,
+                 onClick: function onClick(context, completionHandler) {
+                   var entityId = this.issue.entityIds[0]; // use same degree threshold as for detection
+
+                   context.perform(actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold), _t('operations.orthogonalize.annotation.feature', {
+                     n: 1
+                   })); // run after the squaring transition (currently 150ms)
+
+                   window.setTimeout(function () {
+                     completionHandler();
+                   }, 175);
+                 }
+               })
+               /*
+               new validationIssueFix({
+                   title: t.html('issues.fix.tag_as_unsquare.title'),
+                   onClick: function(context) {
+                       var entityId = this.issue.entityIds[0];
+                       var entity = context.entity(entityId);
+                       var tags = Object.assign({}, entity.tags);  // shallow copy
+                       tags.nonsquare = 'yes';
+                       context.perform(
+                           actionChangeTags(entityId, tags),
+                           t('issues.fix.tag_as_unsquare.annotation')
+                       );

                    }
                    }

-               })];
-
-               function showReference(selection) {
-                   selection.selectAll('.issue-reference')
-                       .data([0])
-                       .enter()
-                       .append('div')
-                       .attr('class', 'issue-reference')
-                       .text(_t('issues.unsquare_way.buildings.reference'));
-               }
-           };
+               })
+               */
+               ];
+             }
+           })];

 
 

-           validation.type = type;
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unsquare_way.buildings.reference'));
+           }
+         };

 
 

-           return validation;
+         validation.type = type;
+         return validation;

        }
 
        var Validations = /*#__PURE__*/Object.freeze({
        }
 
        var Validations = /*#__PURE__*/Object.freeze({


@@ -61445,21414 +59207,19419 @@
                validationPrivateData: validationPrivateData,
                validationSuspiciousName: validationSuspiciousName,
                validationUnsquareWay: validationUnsquareWay
                validationPrivateData: validationPrivateData,
                validationSuspiciousName: validationSuspiciousName,
                validationUnsquareWay: validationUnsquareWay

-       });
-
-       function coreValidator(context) {
-           var dispatch$1 = dispatch('validated', 'focusedIssue');
-           var validator = utilRebind({}, dispatch$1, 'on');
-
-           var _rules = {};
-           var _disabledRules = {};
-
-           var _ignoredIssueIDs = {};          // issue.id -> true
-           var _baseCache = validationCache(); // issues before any user edits
-           var _headCache = validationCache(); // issues after all user edits
-           var _validatedGraph = null;
-           var _deferred = new Set();
-
-           //
-           // initialize the validator rulesets
-           //
-           validator.init = function() {
-               Object.values(Validations).forEach(function(validation) {
-                   if (typeof validation !== 'function') { return; }
-
-                   var fn = validation(context);
-                   var key = fn.type;
-                   _rules[key] = fn;
-               });
-
-               var disabledRules = corePreferences('validate-disabledRules');
-               if (disabledRules) {
-                   disabledRules.split(',')
-                       .forEach(function(key) { _disabledRules[key] = true; });
-               }
-           };
-
-
-           //
-           // clear caches, called whenever iD resets after a save
-           //
-           validator.reset = function() {
-               Array.from(_deferred).forEach(function(handle) {
-                   window.cancelIdleCallback(handle);
-                   _deferred.delete(handle);
-               });
-
-               // clear caches
-               _ignoredIssueIDs = {};
-               _baseCache = validationCache();
-               _headCache = validationCache();
-               _validatedGraph = null;
-           };
-
-           validator.resetIgnoredIssues = function() {
-               _ignoredIssueIDs = {};
-               // reload UI
-               dispatch$1.call('validated');
-           };
-
-
-           // must update issues when the user changes the unsquare thereshold
-           validator.reloadUnsquareIssues = function() {
-
-               reloadUnsquareIssues(_headCache, context.graph());
-               reloadUnsquareIssues(_baseCache, context.history().base());
-
-               dispatch$1.call('validated');
-           };
-
-           function reloadUnsquareIssues(cache, graph) {
-
-               var checkUnsquareWay = _rules.unsquare_way;
-               if (typeof checkUnsquareWay !== 'function') { return; }
-
-               // uncache existing
-               cache.uncacheIssuesOfType('unsquare_way');
-
-               var buildings = context.history().tree().intersects(geoExtent([-180,-90],[180, 90]), graph)  // everywhere
-                   .filter(function(entity) {
-                       return entity.type === 'way' && entity.tags.building && entity.tags.building !== 'no';
-                   });
-
-               // rerun for all buildings
-               buildings.forEach(function(entity) {
-                   var detected = checkUnsquareWay(entity, graph);
-                   if (detected.length !== 1) { return; }
-                   var issue = detected[0];
-                   if (!cache.issuesByEntityID[entity.id]) {
-                       cache.issuesByEntityID[entity.id] = new Set();
-                   }
-                   cache.issuesByEntityID[entity.id].add(issue.id);
-                   cache.issuesByIssueID[issue.id] = issue;
-               });
-           }
-
-           // options = {
-           //     what: 'all',     // 'all' or 'edited'
-           //     where: 'all',   // 'all' or 'visible'
-           //     includeIgnored: false   // true, false, or 'only'
-           //     includeDisabledRules: false   // true, false, or 'only'
-           // };
-           validator.getIssues = function(options) {
-               var opts = Object.assign({ what: 'all', where: 'all', includeIgnored: false, includeDisabledRules: false }, options);
-               var issues = Object.values(_headCache.issuesByIssueID);
-               var view = context.map().extent();
-
-               return issues.filter(function(issue) {
-                   if (!issue) { return false; }
-                   if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) { return false; }
-                   if (!opts.includeDisabledRules && _disabledRules[issue.type]) { return false; }
-
-                   if (opts.includeIgnored === 'only' && !_ignoredIssueIDs[issue.id]) { return false; }
-                   if (!opts.includeIgnored && _ignoredIssueIDs[issue.id]) { return false; }
-
-                   // Sanity check:  This issue may be for an entity that not longer exists.
-                   // If we detect this, uncache and return false so it is not included..
-                   var entityIds = issue.entityIds || [];
-                   for (var i = 0; i < entityIds.length; i++) {
-                       var entityId = entityIds[i];
-                       if (!context.hasEntity(entityId)) {
-                           delete _headCache.issuesByEntityID[entityId];
-                           delete _headCache.issuesByIssueID[issue.id];
-                           return false;
-                       }
-                   }
-
-                   if (opts.what === 'edited' && _baseCache.issuesByIssueID[issue.id]) { return false; }
-
-                   if (opts.where === 'visible') {
-                       var extent = issue.extent(context.graph());
-                       if (!view.intersects(extent)) { return false; }
-                   }
-
-                   return true;
-               });
-           };
-
-           validator.getResolvedIssues = function() {
-               var baseIssues = Object.values(_baseCache.issuesByIssueID);
-               return baseIssues.filter(function(issue) {
-                   return !_headCache.issuesByIssueID[issue.id];
-               });
-           };
-
-           validator.focusIssue = function(issue) {
-               var extent = issue.extent(context.graph());
-
-               if (extent) {
-                   var setZoom = Math.max(context.map().zoom(), 19);
-                   context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
-
-                   // select the first entity
-                   if (issue.entityIds && issue.entityIds.length) {
-                       window.setTimeout(function() {
-                           var ids = issue.entityIds;
-                           context.enter(modeSelect(context, [ids[0]]));
-                           dispatch$1.call('focusedIssue', this, issue);
-                       }, 250);  // after ease
-                   }
-               }
-           };
-
-
-           validator.getIssuesBySeverity = function(options) {
-               var groups = utilArrayGroupBy(validator.getIssues(options), 'severity');
-               groups.error = groups.error || [];
-               groups.warning = groups.warning || [];
-               return groups;
-           };
-
-           // show some issue types in a particular order
-           var orderedIssueTypes = [
-               // flag missing data first
-               'missing_tag', 'missing_role',
-               // then flag identity issues
-               'outdated_tags', 'mismatched_geometry',
-               // flag geometry issues where fixing them might solve connectivity issues
-               'crossing_ways', 'almost_junction',
-               // then flag connectivity issues
-               'disconnected_way', 'impossible_oneway'
-           ];
-
-           // returns the issues that the given entity IDs have in common, matching the given options
-           validator.getSharedEntityIssues = function(entityIDs, options) {
-               var cache = _headCache;
-
-               // gather the issues that are common to all the entities
-               var issueIDs = entityIDs.reduce(function(acc, entityID) {
-                   var entityIssueIDs = cache.issuesByEntityID[entityID] || new Set();
-                   if (!acc) {
-                       return new Set(entityIssueIDs);
-                   }
-                   return new Set([].concat( acc ).filter(function(elem) {
-                       return entityIssueIDs.has(elem);
-                   }));
-               }, null) || [];
-
-               var opts = options || {};
-
-               return Array.from(issueIDs)
-                   .map(function(id) { return cache.issuesByIssueID[id]; })
-                   .filter(function(issue) {
-                       if (!issue) { return false; }
-                       if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) { return false; }
-                       if (!opts.includeDisabledRules && _disabledRules[issue.type]) { return false; }
-
-                       if (opts.includeIgnored === 'only' && !_ignoredIssueIDs[issue.id]) { return false; }
-                       if (!opts.includeIgnored && _ignoredIssueIDs[issue.id]) { return false; }
-
-                       return true;
-                   }).sort(function(issue1, issue2) {
-                       if (issue1.type === issue2.type) {
-                           // issues of the same type, sort deterministically
-                           return issue1.id < issue2.id ? -1 : 1;
-                       }
-                       var index1 = orderedIssueTypes.indexOf(issue1.type);
-                       var index2 = orderedIssueTypes.indexOf(issue2.type);
-                       if (index1 !== -1 && index2 !== -1) {
-                           // both issue types have explicit sort orders
-                           return index1 - index2;
-                       } else if (index1 === -1 && index2 === -1) {
-                           // neither issue type has an explicit sort order, sort by type
-                           return issue1.type < issue2.type ? -1 : 1;
-                       } else {
-                           // order explicit types before everything else
-                           return index1 !== -1 ? -1 : 1;
-                       }
-                   });
-           };
-
-
-           validator.getEntityIssues = function(entityID, options) {
-               return validator.getSharedEntityIssues([entityID], options);
-           };
-
-
-           validator.getRuleKeys = function() {
-               return Object.keys(_rules);
-           };
-
-
-           validator.isRuleEnabled = function(key) {
-               return !_disabledRules[key];
-           };
-
-
-           validator.toggleRule = function(key) {
-               if (_disabledRules[key]) {
-                   delete _disabledRules[key];
-               } else {
-                   _disabledRules[key] = true;
-               }
-
-               corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-               validator.validate();
-           };
-
-
-           validator.disableRules = function(keys) {
-               _disabledRules = {};
-               keys.forEach(function(k) {
-                   _disabledRules[k] = true;
-               });
-
-               corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-               validator.validate();
-           };
-
-
-           validator.ignoreIssue = function(id) {
-               _ignoredIssueIDs[id] = true;
-           };
-
-
-           //
-           // Run validation on a single entity for the given graph
-           //
-           function validateEntity(entity, graph) {
-               var entityIssues = [];
-
-               // runs validation and appends resulting issues
-               function runValidation(key) {
-
-                   var fn = _rules[key];
-                   if (typeof fn !== 'function') {
-                       console.error('no such validation rule = ' + key);  // eslint-disable-line no-console
-                       return;
-                   }
-
-                   var detected = fn(entity, graph);
-                   entityIssues = entityIssues.concat(detected);
-               }
-
-               // run all rules
-               Object.keys(_rules).forEach(runValidation);
-
-               return entityIssues;
-           }
-
-           function entityIDsToValidate(entityIDs, graph) {
-               var processedIDs = new Set();
-               return entityIDs.reduce(function(acc, entityID) {
-                   // keep redundancy check separate from `acc` because an `entityID`
-                   // could have been added to `acc` as a related entity through an earlier pass
-                   if (processedIDs.has(entityID)) { return acc; }
-                   processedIDs.add(entityID);
-
-                   var entity = graph.hasEntity(entityID);
-                   if (!entity) { return acc; }
-
-                   acc.add(entityID);
-
-                   var checkParentRels = [entity];
-
-                   if (entity.type === 'node') {
-                       graph.parentWays(entity).forEach(function(parentWay) {
-                           acc.add(parentWay.id); // include parent ways
-                           checkParentRels.push(parentWay);
-                       });
-                   } else if (entity.type === 'relation') {
-                       entity.members.forEach(function(member) {
-                           acc.add(member.id); // include members
-                       });
-                   } else if (entity.type === 'way') {
-                       entity.nodes.forEach(function(nodeID) {
-                           acc.add(nodeID); // include child nodes
-                           graph._parentWays[nodeID].forEach(function(wayID) {
-                               acc.add(wayID); // include connected ways
-                           });
-                       });
-                   }
-
-                   checkParentRels.forEach(function(entity) {   // include parent relations
-                       if (entity.type !== 'relation') {        // but not super-relations
-                           graph.parentRelations(entity).forEach(function(parentRelation) {
-                               acc.add(parentRelation.id);
-                           });
-                       }
-                   });
-
-                   return acc;
-
-               }, new Set());
-           }
-
-           //
-           // Run validation for several entities, supplied `entityIDs`,
-           // against `graph` for the given `cache`
-           //
-           function validateEntities(entityIDs, graph, cache) {
-
-               // clear caches for existing issues related to these entities
-               entityIDs.forEach(cache.uncacheEntityID);
-
-               // detect new issues and update caches
-               entityIDs.forEach(function(entityID) {
-                   var entity = graph.hasEntity(entityID);
-                   // don't validate deleted entities
-                   if (!entity) { return; }
-
-                   var issues = validateEntity(entity, graph);
-                   cache.cacheIssues(issues);
-               });
-           }
-
-
-           //
-           // Validates anything that has changed since the last time it was run.
-           // Also updates the "validatedGraph" to be the current graph
-           // and dispatches a `validated` event when finished.
-           //
-           validator.validate = function() {
-
-               var currGraph = context.graph();
-               _validatedGraph = _validatedGraph || context.history().base();
-               if (currGraph === _validatedGraph) {
-                   dispatch$1.call('validated');
-                   return;
-               }
-               var oldGraph = _validatedGraph;
-               var difference = coreDifference(oldGraph, currGraph);
-               _validatedGraph = currGraph;
-
-               var createdAndModifiedEntityIDs = difference.extantIDs(true);   // created/modified (true = w/relation members)
-               var entityIDsToCheck = entityIDsToValidate(createdAndModifiedEntityIDs, currGraph);
-
-               // check modified and deleted entities against the old graph in order to update their related entities
-               // (e.g. deleting the only highway connected to a road should create a disconnected highway issue)
-               var modifiedAndDeletedEntityIDs = difference.deleted().concat(difference.modified())
-                   .map(function(entity) { return entity.id; });
-               var entityIDsToCheckForOldGraph = entityIDsToValidate(modifiedAndDeletedEntityIDs, oldGraph);
-
-               // concat the sets
-               entityIDsToCheckForOldGraph.forEach(entityIDsToCheck.add, entityIDsToCheck);
-
-               validateEntities(entityIDsToCheck, context.graph(), _headCache);
-
-               dispatch$1.call('validated');
-           };
-
-
-           // WHEN TO RUN VALIDATION:
-           // When graph changes:
-           context.history()
-               .on('restore.validator', validator.validate)   // restore saved history
-               .on('undone.validator', validator.validate)    // undo
-               .on('redone.validator', validator.validate);   // redo
-               // but not on 'change' (e.g. while drawing)
-
-           // When user chages editing modes:
-           context
-               .on('exit.validator', validator.validate);
-
-           // When merging fetched data:
-           context.history()
-               .on('merge.validator', function(entities) {
-                   if (!entities) { return; }
-                   var handle = window.requestIdleCallback(function() {
-                       var entityIDs = entities.map(function(entity) { return entity.id; });
-                       var headGraph = context.graph();
-                       validateEntities(entityIDsToValidate(entityIDs, headGraph), headGraph, _headCache);
-
-                       var baseGraph = context.history().base();
-                       validateEntities(entityIDsToValidate(entityIDs, baseGraph), baseGraph, _baseCache);
-
-                       dispatch$1.call('validated');
-                   });
-                   _deferred.add(handle);
-               });
-
-
-           return validator;
-       }
-
-
-       function validationCache() {
-
-           var cache = {
-               issuesByIssueID: {},  // issue.id -> issue
-               issuesByEntityID: {} // entity.id -> set(issue.id)
-           };
-
-           cache.cacheIssues = function(issues) {
-               issues.forEach(function(issue) {
-                   var entityIds = issue.entityIds || [];
-                   entityIds.forEach(function(entityId) {
-                       if (!cache.issuesByEntityID[entityId]) {
-                           cache.issuesByEntityID[entityId] = new Set();
-                       }
-                       cache.issuesByEntityID[entityId].add(issue.id);
-                   });
-                   cache.issuesByIssueID[issue.id] = issue;
-               });
-           };
-
-           cache.uncacheIssue = function(issue) {
-               // When multiple entities are involved (e.g. crossing_ways),
-               // remove this issue from the other entity caches too..
-               var entityIds = issue.entityIds || [];
-               entityIds.forEach(function(entityId) {
-                   if (cache.issuesByEntityID[entityId]) {
-                       cache.issuesByEntityID[entityId].delete(issue.id);
-                   }
-               });
-               delete cache.issuesByIssueID[issue.id];
-           };
-
-           cache.uncacheIssues = function(issues) {
-               issues.forEach(cache.uncacheIssue);
-           };
-
-           cache.uncacheIssuesOfType = function(type) {
-               var issuesOfType = Object.values(cache.issuesByIssueID)
-                   .filter(function(issue) { return issue.type === type; });
-               cache.uncacheIssues(issuesOfType);
-           };
-
-           //
-           // Remove a single entity and all its related issues from the caches
-           //
-           cache.uncacheEntityID = function(entityID) {
-               var issueIDs = cache.issuesByEntityID[entityID];
-               if (!issueIDs) { return; }
-
-               issueIDs.forEach(function(issueID) {
-                   var issue = cache.issuesByIssueID[issueID];
-                   if (issue) {
-                       cache.uncacheIssue(issue);
-                   } else {
-                       delete cache.issuesByIssueID[issueID];
-                   }
-               });
-
-               delete cache.issuesByEntityID[entityID];
-           };
-
-           return cache;
-       }
-
-       function coreUploader(context) {
-
-           var dispatch$1 = dispatch(
-               // Start and end events are dispatched exactly once each per legitimate outside call to `save`
-               'saveStarted', // dispatched as soon as a call to `save` has been deemed legitimate
-               'saveEnded',   // dispatched after the result event has been dispatched
-
-               'willAttemptUpload', // dispatched before the actual upload call occurs, if it will
-               'progressChanged',
-
-               // Each save results in one of these outcomes:
-               'resultNoChanges', // upload wasn't attempted since there were no edits
-               'resultErrors',    // upload failed due to errors
-               'resultConflicts', // upload failed due to data conflicts
-               'resultSuccess'    // upload completed without errors
-           );
-
-           var _isSaving = false;
-
-           var _conflicts = [];
-           var _errors = [];
-           var _origChanges;
-
-           var _discardTags = {};
-           _mainFileFetcher.get('discarded')
-               .then(function(d) { _discardTags = d; })
-               .catch(function() { /* ignore */ });
-
-           var uploader = utilRebind({}, dispatch$1, 'on');
-
-           uploader.isSaving = function() {
-               return _isSaving;
-           };
-
-           uploader.save = function(changeset, tryAgain, checkConflicts) {
-               // Guard against accidentally entering save code twice - #4641
-               if (_isSaving && !tryAgain) {
-                   return;
-               }
-
-               var osm = context.connection();
-               if (!osm) { return; }
-
-               // If user somehow got logged out mid-save, try to reauthenticate..
-               // This can happen if they were logged in from before, but the tokens are no longer valid.
-               if (!osm.authenticated()) {
-                   osm.authenticate(function(err) {
-                       if (!err) {
-                           uploader.save(changeset, tryAgain, checkConflicts);  // continue where we left off..
-                       }
-                   });
-                   return;
-               }
-
-               if (!_isSaving) {
-                   _isSaving = true;
-                   dispatch$1.call('saveStarted', this);
-               }
-
-               var history = context.history();
-
-               _conflicts = [];
-               _errors = [];
-
-               // Store original changes, in case user wants to download them as an .osc file
-               _origChanges = history.changes(actionDiscardTags(history.difference(), _discardTags));
-
-               // First time, `history.perform` a no-op action.
-               // Any conflict resolutions will be done as `history.replace`
-               // Remember to pop this later if needed
-               if (!tryAgain) {
-                   history.perform(actionNoop());
-               }
-
-               // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
-               if (!checkConflicts) {
-                   upload(changeset);
-
-               // Do the full (slow) conflict check..
-               } else {
-                   performFullConflictCheck(changeset);
-               }
-
-           };
-
-
-           function performFullConflictCheck(changeset) {
-
-               var osm = context.connection();
-               if (!osm) { return; }
-
-               var history = context.history();
-
-               var localGraph = context.graph();
-               var remoteGraph = coreGraph(history.base(), true);
-
-               var summary = history.difference().summary();
-               var _toCheck = [];
-               for (var i = 0; i < summary.length; i++) {
-                   var item = summary[i];
-                   if (item.changeType === 'modified') {
-                       _toCheck.push(item.entity.id);
-                   }
-               }
-
-               var _toLoad = withChildNodes(_toCheck, localGraph);
-               var _loaded = {};
-               var _toLoadCount = 0;
-               var _toLoadTotal = _toLoad.length;
-
-               if (_toCheck.length) {
-                   dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
-                   _toLoad.forEach(function(id) { _loaded[id] = false; });
-                   osm.loadMultiple(_toLoad, loaded);
-               } else {
-                   upload(changeset);
-               }
-
-               return;
-
-               function withChildNodes(ids, graph) {
-                   var s = new Set(ids);
-                   ids.forEach(function(id) {
-                       var entity = graph.entity(id);
-                       if (entity.type !== 'way') { return; }
-
-                       graph.childNodes(entity).forEach(function(child) {
-                           if (child.version !== undefined) {
-                               s.add(child.id);
-                           }
-                       });
-                   });
-
-                   return Array.from(s);
-               }
-
-
-               // Reload modified entities into an alternate graph and check for conflicts..
-               function loaded(err, result) {
-                   if (_errors.length) { return; }
-
-                   if (err) {
-                       _errors.push({
-                           msg: err.message || err.responseText,
-                           details: [ _t('save.status_code', { code: err.status }) ]
-                       });
-                       didResultInErrors();
-
-                   } else {
-                       var loadMore = [];
-
-                       result.data.forEach(function(entity) {
-                           remoteGraph.replace(entity);
-                           _loaded[entity.id] = true;
-                           _toLoad = _toLoad.filter(function(val) { return val !== entity.id; });
-
-                           if (!entity.visible) { return; }
-
-                           // Because loadMultiple doesn't download /full like loadEntity,
-                           // need to also load children that aren't already being checked..
-                           var i, id;
-                           if (entity.type === 'way') {
-                               for (i = 0; i < entity.nodes.length; i++) {
-                                   id = entity.nodes[i];
-                                   if (_loaded[id] === undefined) {
-                                       _loaded[id] = false;
-                                       loadMore.push(id);
-                                   }
-                               }
-                           } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-                               for (i = 0; i < entity.members.length; i++) {
-                                   id = entity.members[i].id;
-                                   if (_loaded[id] === undefined) {
-                                       _loaded[id] = false;
-                                       loadMore.push(id);
-                                   }
-                               }
-                           }
-                       });
-
-                       _toLoadCount += result.data.length;
-                       _toLoadTotal += loadMore.length;
-                       dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
-
-                       if (loadMore.length) {
-                           _toLoad.push.apply(_toLoad, loadMore);
-                           osm.loadMultiple(loadMore, loaded);
-                       }
-
-                       if (!_toLoad.length) {
-                           detectConflicts();
-                           upload(changeset);
-                       }
-                   }
-               }
-
-
-               function detectConflicts() {
-                   function choice(id, text, action) {
-                       return {
-                           id: id,
-                           text: text,
-                           action: function() {
-                               history.replace(action);
-                           }
-                       };
-                   }
-                   function formatUser(d) {
-                       return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
-                   }
-                   function entityName(entity) {
-                       return utilDisplayName(entity) || (utilDisplayType(entity.id) + ' ' + entity.id);
-                   }
-
-                   function sameVersions(local, remote) {
-                       if (local.version !== remote.version) { return false; }
-
-                       if (local.type === 'way') {
-                           var children = utilArrayUnion(local.nodes, remote.nodes);
-                           for (var i = 0; i < children.length; i++) {
-                               var a = localGraph.hasEntity(children[i]);
-                               var b = remoteGraph.hasEntity(children[i]);
-                               if (a && b && a.version !== b.version) { return false; }
-                           }
-                       }
-
-                       return true;
-                   }
-
-                   _toCheck.forEach(function(id) {
-                       var local = localGraph.entity(id);
-                       var remote = remoteGraph.entity(id);
-
-                       if (sameVersions(local, remote)) { return; }
-
-                       var merge = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags, formatUser);
-
-                       history.replace(merge);
-
-                       var mergeConflicts = merge.conflicts();
-                       if (!mergeConflicts.length) { return; }  // merged safely
-
-                       var forceLocal = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_local');
-                       var forceRemote = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_remote');
-                       var keepMine = _t('save.conflict.' + (remote.visible ? 'keep_local' : 'restore'));
-                       var keepTheirs = _t('save.conflict.' + (remote.visible ? 'keep_remote' : 'delete'));
-
-                       _conflicts.push({
-                           id: id,
-                           name: entityName(local),
-                           details: mergeConflicts,
-                           chosen: 1,
-                           choices: [
-                               choice(id, keepMine, forceLocal),
-                               choice(id, keepTheirs, forceRemote)
-                           ]
-                       });
-                   });
-               }
-           }
-
-
-           function upload(changeset) {
-               var osm = context.connection();
-               if (!osm) {
-                   _errors.push({ msg: 'No OSM Service' });
-               }
-
-               if (_conflicts.length) {
-                   didResultInConflicts(changeset);
-
-               } else if (_errors.length) {
-                   didResultInErrors();
-
-               } else {
-                   var history = context.history();
-                   var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
-                   if (changes.modified.length || changes.created.length || changes.deleted.length) {
-
-                       dispatch$1.call('willAttemptUpload', this);
-
-                       osm.putChangeset(changeset, changes, uploadCallback);
-
-                   } else {
-                       // changes were insignificant or reverted by user
-                       didResultInNoChanges();
-                   }
-               }
-           }
-
-
-           function uploadCallback(err, changeset) {
-               if (err) {
-                   if (err.status === 409) {  // 409 Conflict
-                       uploader.save(changeset, true, true);  // tryAgain = true, checkConflicts = true
-                   } else {
-                       _errors.push({
-                           msg: err.message || err.responseText,
-                           details: [ _t('save.status_code', { code: err.status }) ]
-                       });
-                       didResultInErrors();
-                   }
-
-               } else {
-                   didResultInSuccess(changeset);
-               }
-           }
-
-           function didResultInNoChanges() {
-
-               dispatch$1.call('resultNoChanges', this);
-
-               endSave();
-
-               context.flush(); // reset iD
-           }
-
-           function didResultInErrors() {
-
-               context.history().pop();
-
-               dispatch$1.call('resultErrors', this, _errors);
-
-               endSave();
-           }
-
-
-           function didResultInConflicts(changeset) {
-
-               _conflicts.sort(function(a, b) { return b.id.localeCompare(a.id); });
-
-               dispatch$1.call('resultConflicts', this, changeset, _conflicts, _origChanges);
-
-               endSave();
-           }
-
-
-           function didResultInSuccess(changeset) {
-
-               // delete the edit stack cached to local storage
-               context.history().clearSaved();
-
-               dispatch$1.call('resultSuccess', this, changeset);
-
-               // Add delay to allow for postgres replication #1646 #2678
-               window.setTimeout(function() {
-
-                   endSave();
+       });

 
 

-                   context.flush(); // reset iD
-               }, 2500);
-           }
+       function coreValidator(context) {
+         var _this = this;

 
 

+         var dispatch = dispatch$8('validated', 'focusedIssue');
+         var validator = utilRebind({}, dispatch, 'on');
+         var _rules = {};
+         var _disabledRules = {};

 
 

-           function endSave() {
-               _isSaving = false;
+         var _ignoredIssueIDs = new Set();

 
 

-               dispatch$1.call('saveEnded', this);
-           }
+         var _resolvedIssueIDs = new Set();

 
 

+         var _baseCache = validationCache('base'); // issues before any user edits

 
 

-           uploader.cancelConflictResolution = function() {
-               context.history().pop();
-           };

 
 

+         var _headCache = validationCache('head'); // issues after all user edits

 
 

-           uploader.processResolvedConflicts = function(changeset) {
-               var history = context.history();

 
 

-               for (var i = 0; i < _conflicts.length; i++) {
-                   if (_conflicts[i].chosen === 1) {  // user chose "use theirs"
-                       var entity = context.hasEntity(_conflicts[i].id);
-                       if (entity && entity.type === 'way') {
-                           var children = utilArrayUniq(entity.nodes);
-                           for (var j = 0; j < children.length; j++) {
-                               history.replace(actionRevert(children[j]));
-                           }
-                       }
-                       history.replace(actionRevert(_conflicts[i].id));
-                   }
-               }
+         var _completeDiff = {}; // complete diff base -> head of what the user changed

 
 

-               uploader.save(changeset, true, false);  // tryAgain = true, checkConflicts = false
-           };
+         var _headIsCurrent = false;

 
 

+         var _deferredRIC = new Set(); // Set( RequestIdleCallback handles )

 
 

-           uploader.reset = function() {

 
 

-           };
+         var _deferredST = new Set(); // Set( SetTimeout handles )

 
 
 
 

-           return uploader;
-       }
+         var _headPromise; // Promise fulfilled when validation is performed up to headGraph snapshot

 
 

-       var isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;

 
 

-       // listen for DPI change, e.g. when dragging a browser window from a retina to non-retina screen
-       window.matchMedia("\n        (-webkit-min-device-pixel-ratio: 2), /* Safari */\n        (min-resolution: 2dppx),             /* standard */\n        (min-resolution: 192dpi)             /* fallback */\n    ").addListener(function() {
+         var RETRY = 5000; // wait 5sec before revalidating provisional entities
+         // Allow validation severity to be overridden by url queryparams...
+         // See: https://github.com/openstreetmap/iD/pull/8243
+         //
+         // Each param should contain a urlencoded comma separated list of
+         // `type/subtype` rules.  `*` may be used as a wildcard..
+         // Examples:
+         //  `validationError=disconnected_way/*`
+         //  `validationError=disconnected_way/highway`
+         //  `validationError=crossing_ways/bridge*`
+         //  `validationError=crossing_ways/bridge*,crossing_ways/tunnel*`
+
+         var _errorOverrides = parseHashParam(context.initialHashParams.validationError);
+
+         var _warningOverrides = parseHashParam(context.initialHashParams.validationWarning);
+
+         var _disableOverrides = parseHashParam(context.initialHashParams.validationDisable); // `parseHashParam()`   (private)
+         // Checks hash parameters for severity overrides
+         // Arguments
+         //   `param` - a url hash parameter (`validationError`, `validationWarning`, or `validationDisable`)
+         // Returns
+         //   Array of Objects like { type: RegExp, subtype: RegExp }
+         //

 
 

-           isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
-       });

 
 

+         function parseHashParam(param) {
+           var result = [];
+           var rules = (param || '').split(',');
+           rules.forEach(function (rule) {
+             rule = rule.trim();
+             var parts = rule.split('/', 2); // "type/subtype"
+
+             var type = parts[0];
+             var subtype = parts[1] || '*';
+             if (!type || !subtype) return;
+             result.push({
+               type: makeRegExp(type),
+               subtype: makeRegExp(subtype)
+             });
+           });
+           return result;

 
 

-       function localeDateString(s) {
-           if (!s) { return null; }
-           var options = { day: 'numeric', month: 'short', year: 'numeric' };
-           var d = new Date(s);
-           if (isNaN(d.getTime())) { return null; }
-           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-       }
+           function makeRegExp(str) {
+             var escaped = str.replace(/[-\/\\^$+?.()|[\]{}]/g, '\\$&') // escape all reserved chars except for the '*'
+             .replace(/\*/g, '.*'); // treat a '*' like '.*'

 
 

-       function vintageRange(vintage) {
-           var s;
-           if (vintage.start || vintage.end) {
-               s = (vintage.start || '?');
-               if (vintage.start !== vintage.end) {
-                   s += ' - ' + (vintage.end || '?');
-               }
+             return new RegExp('^' + escaped + '$');

            }
            }

-           return s;
-       }
-
+         } // `init()`
+         // Initialize the validator, called once on iD startup
+         //

 
 

-       function rendererBackgroundSource(data) {
-           var source = Object.assign({}, data);   // shallow copy
-           var _offset = [0, 0];
-           var _name = source.name;
-           var _description = source.description;
-           var _best = !!source.best;
-           var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
-
-           source.tileSize = data.tileSize || 256;
-           source.zoomExtent = data.zoomExtent || [0, 22];
-           source.overzoom = data.overzoom !== false;
-
-           source.offset = function(val) {
-               if (!arguments.length) { return _offset; }
-               _offset = val;
-               return source;
-           };

 
 

+         validator.init = function () {
+           Object.values(Validations).forEach(function (validation) {
+             if (typeof validation !== 'function') return;
+             var fn = validation(context);
+             var key = fn.type;
+             _rules[key] = fn;
+           });
+           var disabledRules = corePreferences('validate-disabledRules');

 
 

-           source.nudge = function(val, zoomlevel) {
-               _offset[0] += val[0] / Math.pow(2, zoomlevel);
-               _offset[1] += val[1] / Math.pow(2, zoomlevel);
-               return source;
-           };
+           if (disabledRules) {
+             disabledRules.split(',').forEach(function (k) {
+               return _disabledRules[k] = true;
+             });
+           }
+         }; // `reset()`   (private)
+         // Cancels deferred work and resets all caches
+         //
+         // Arguments
+         //   `resetIgnored` - `true` to clear the list of user-ignored issues
+         //

 
 
 
 

-           source.name = function() {
-               var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-               return _t('imagery.' + id_safe + '.name', { default: _name });
-           };
+         function reset(resetIgnored) {
+           // cancel deferred work
+           _deferredRIC.forEach(window.cancelIdleCallback);

 
 

+           _deferredRIC.clear();

 
 

-           source.description = function() {
-               var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-               return _t('imagery.' + id_safe + '.description', { default: _description });
-           };
+           _deferredST.forEach(window.clearTimeout);

 
 

+           _deferredST.clear(); // empty queues and resolve any pending promise

 
 

-           source.best = function() {
-               return _best;
-           };

 
 

+           _baseCache.queue = [];
+           _headCache.queue = [];
+           processQueue(_headCache);
+           processQueue(_baseCache); // clear caches

 
 

-           source.area = function() {
-               if (!data.polygon) { return Number.MAX_VALUE; }  // worldwide
-               var area = d3_geoArea({ type: 'MultiPolygon', coordinates: [ data.polygon ] });
-               return isNaN(area) ? 0 : area;
-           };
+           if (resetIgnored) _ignoredIssueIDs.clear();

 
 

+           _resolvedIssueIDs.clear();

 
 

-           source.imageryUsed = function() {
-               return name || source.id;
-           };
+           _baseCache = validationCache('base');
+           _headCache = validationCache('head');
+           _completeDiff = {};
+           _headIsCurrent = false;
+         } // `reset()`
+         // clear caches, called whenever iD resets after a save or switches sources
+         // (clears out the _ignoredIssueIDs set also)
+         //

 
 
 
 

-           source.template = function(val) {
-               if (!arguments.length) { return _template; }
-               if (source.id === 'custom') {
-                   _template = val;
-               }
-               return source;
-           };
+         validator.reset = function () {
+           reset(true);
+         }; // `resetIgnoredIssues()`
+         // clears out the _ignoredIssueIDs Set
+         //

 
 
 
 

-           source.url = function(coord) {
-               var result = _template;
-               if (result === '') { return result; }   // source 'none'
+         validator.resetIgnoredIssues = function () {
+           _ignoredIssueIDs.clear();

 
 

+           dispatch.call('validated'); // redraw UI
+         }; // `revalidateUnsquare()`
+         // Called whenever the user changes the unsquare threshold
+         // It reruns just the "unsquare_way" validation on all buildings.
+         //

 
 

-               // Guess a type based on the tokens present in the template
-               // (This is for 'custom' source, where we don't know)
-               if (!source.type) {
-                   if (/SERVICE=WMS|\{(proj|wkid|bbox)\}/.test(_template)) {
-                       source.type = 'wms';
-                       source.projection = 'EPSG:3857';  // guess
-                   } else if (/\{(x|y)\}/.test(_template)) {
-                       source.type = 'tms';
-                   } else if (/\{u\}/.test(_template)) {
-                       source.type = 'bing';
-                   }
-               }

 
 

+         validator.revalidateUnsquare = function () {
+           revalidateUnsquare(_headCache);
+           revalidateUnsquare(_baseCache);
+           dispatch.call('validated');
+         };

 
 

-               if (source.type === 'wms') {
-                   var tileToProjectedCoords = (function(x, y, z) {
-                       //polyfill for IE11, PhantomJS
-                       var sinh = Math.sinh || function(x) {
-                           var y = Math.exp(x);
-                           return (y - 1 / y) / 2;
-                       };
+         function revalidateUnsquare(cache) {
+           var checkUnsquareWay = _rules.unsquare_way;
+           if (!cache.graph || typeof checkUnsquareWay !== 'function') return; // uncache existing

 
 

-                       var zoomSize = Math.pow(2, z);
-                       var lon = x / zoomSize * Math.PI * 2 - Math.PI;
-                       var lat = Math.atan(sinh(Math.PI * (1 - 2 * y / zoomSize)));
-
-                       switch (source.projection) {
-                           case 'EPSG:4326':
-                               return {
-                                   x: lon * 180 / Math.PI,
-                                   y: lat * 180 / Math.PI
-                               };
-                           default: // EPSG:3857 and synonyms
-                               var mercCoords = mercatorRaw(lon, lat);
-                               return {
-                                   x: 20037508.34 / Math.PI * mercCoords[0],
-                                   y: 20037508.34 / Math.PI * mercCoords[1]
-                               };
-                       }
-                   });
+           cache.uncacheIssuesOfType('unsquare_way');
+           var buildings = context.history().tree().intersects(geoExtent([-180, -90], [180, 90]), cache.graph) // everywhere
+           .filter(function (entity) {
+             return entity.type === 'way' && entity.tags.building && entity.tags.building !== 'no';
+           }); // rerun for all buildings

 
 

-                   var tileSize = source.tileSize;
-                   var projection = source.projection;
-                   var minXmaxY = tileToProjectedCoords(coord[0], coord[1], coord[2]);
-                   var maxXminY = tileToProjectedCoords(coord[0]+1, coord[1]+1, coord[2]);
-
-                   result = result.replace(/\{(\w+)\}/g, function (token, key) {
-                     switch (key) {
-                       case 'width':
-                       case 'height':
-                           return tileSize;
-                       case 'proj':
-                           return projection;
-                       case 'wkid':
-                           return projection.replace(/^EPSG:/, '');
-                       case 'bbox':
-                           // WMS 1.3 flips x/y for some coordinate systems including EPSG:4326 - #7557
-                           if (projection === 'EPSG:4326' &&
-                               // The CRS parameter implies version 1.3 (prior versions use SRS)
-                               /VERSION=1.3|CRS={proj}/.test(source.template())) {
-                               return maxXminY.y + ',' + minXmaxY.x + ',' + minXmaxY.y + ',' + maxXminY.x;
-                           } else {
-                               return minXmaxY.x + ',' + maxXminY.y + ',' + maxXminY.x + ',' + minXmaxY.y;
-                           }
-                       case 'w':
-                           return minXmaxY.x;
-                       case 's':
-                           return maxXminY.y;
-                       case 'n':
-                           return maxXminY.x;
-                       case 'e':
-                           return minXmaxY.y;
-                       default:
-                           return token;
-                     }
-                   });
+           buildings.forEach(function (entity) {
+             var detected = checkUnsquareWay(entity, cache.graph);
+             if (!detected.length) return;
+             cache.cacheIssues(detected);
+           });
+         } // `getIssues()`
+         // Gets all issues that match the given options
+         // This is called by many other places
+         //
+         // Arguments
+         //   `options` Object like:
+         //   {
+         //     what: 'all',                  // 'all' or 'edited'
+         //     where: 'all',                 // 'all' or 'visible'
+         //     includeIgnored: false,        // true, false, or 'only'
+         //     includeDisabledRules: false   // true, false, or 'only'
+         //   }
+         //
+         // Returns
+         //   An Array containing the issues
+         //

 
 

-               } else if (source.type === 'tms') {
-                   result = result
-                       .replace('{x}', coord[0])
-                       .replace('{y}', coord[1])
-                       // TMS-flipped y coordinate
-                       .replace(/\{[t-]y\}/, Math.pow(2, coord[2]) - coord[1] - 1)
-                       .replace(/\{z(oom)?\}/, coord[2])
-                       // only fetch retina tiles for retina screens
-                       .replace(/\{@2x\}|\{r\}/, isRetina ? '@2x' : '');
-
-               } else if (source.type === 'bing') {
-                   result = result
-                       .replace('{u}', function() {
-                           var u = '';
-                           for (var zoom = coord[2]; zoom > 0; zoom--) {
-                               var b = 0;
-                               var mask = 1 << (zoom - 1);
-                               if ((coord[0] & mask) !== 0) { b++; }
-                               if ((coord[1] & mask) !== 0) { b += 2; }
-                               u += b.toString();
-                           }
-                           return u;
-                       });
-               }

 
 

-               // these apply to any type..
-               result = result.replace(/\{switch:([^}]+)\}/, function(s, r) {
-                   var subdomains = r.split(',');
-                   return subdomains[(coord[0] + coord[1]) % subdomains.length];
+         validator.getIssues = function (options) {
+           var opts = Object.assign({
+             what: 'all',
+             where: 'all',
+             includeIgnored: false,
+             includeDisabledRules: false
+           }, options);
+           var view = context.map().extent();
+           var seen = new Set();
+           var results = []; // collect head issues - present in the user edits
+
+           if (_headCache.graph && _headCache.graph !== _baseCache.graph) {
+             Object.values(_headCache.issuesByIssueID).forEach(function (issue) {
+               // In the head cache, only count features that the user is responsible for - #8632
+               // For example, a user can undo some work and an issue will still present in the
+               // head graph, but we don't want to credit the user for causing that issue.
+               var userModified = (issue.entityIds || []).some(function (id) {
+                 return _completeDiff.hasOwnProperty(id);

                });
                });

+               if (opts.what === 'edited' && !userModified) return; // present in head but user didn't touch it

 
 

-
-               return result;
-           };
-
-
-           source.validZoom = function(z) {
-               return source.zoomExtent[0] <= z &&
-                   (source.overzoom || source.zoomExtent[1] > z);
-           };
-
-
-           source.isLocatorOverlay = function() {
-               return source.id === 'mapbox_locator_overlay';
-           };
+               if (!filter(issue)) return;
+               seen.add(issue.id);
+               results.push(issue);
+             });
+           } // collect base issues - present before user edits

 
 
 
 

-           /* hides a source from the list, but leaves it available for use */
-           source.isHidden = function() {
-               return source.id === 'DigitalGlobe-Premium-vintage' ||
-                   source.id === 'DigitalGlobe-Standard-vintage';
-           };
+           if (opts.what === 'all') {
+             Object.values(_baseCache.issuesByIssueID).forEach(function (issue) {
+               if (!filter(issue)) return;
+               seen.add(issue.id);
+               results.push(issue);
+             });
+           }

 
 

+           return results; // Filter the issue set to include only what the calling code wants to see.
+           // Note that we use `context.graph()`/`context.hasEntity()` here, not `cache.graph`,
+           // because that is the graph that the calling code will be using.

 
 

-           source.copyrightNotices = function() {};
+           function filter(issue) {
+             if (!issue) return false;
+             if (seen.has(issue.id)) return false;
+             if (_resolvedIssueIDs.has(issue.id)) return false;
+             if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) return false;
+             if (!opts.includeDisabledRules && _disabledRules[issue.type]) return false;
+             if (opts.includeIgnored === 'only' && !_ignoredIssueIDs.has(issue.id)) return false;
+             if (!opts.includeIgnored && _ignoredIssueIDs.has(issue.id)) return false; // This issue may involve an entity that doesn't exist in context.graph()
+             // This can happen because validation is async and rendering the issue lists is async.

 
 

+             if ((issue.entityIds || []).some(function (id) {
+               return !context.hasEntity(id);
+             })) return false;

 
 

-           source.getMetadata = function(center, tileCoord, callback) {
-               var vintage = {
-                   start: localeDateString(source.startDate),
-                   end: localeDateString(source.endDate)
-               };
-               vintage.range = vintageRange(vintage);
+             if (opts.where === 'visible') {
+               var extent = issue.extent(context.graph());
+               if (!view.intersects(extent)) return false;
+             }

 
 

-               var metadata = { vintage: vintage };
-               callback(null, metadata);
-           };
+             return true;
+           }
+         }; // `getResolvedIssues()`
+         // Gets the issues that have been fixed by the user.
+         //
+         // Resolved issues are tracked in the `_resolvedIssueIDs` Set,
+         // and they should all be issues that exist in the _baseCache.
+         //
+         // Returns
+         //   An Array containing the issues
+         //

 
 
 
 

-           return source;
-       }
+         validator.getResolvedIssues = function () {
+           return Array.from(_resolvedIssueIDs).map(function (issueID) {
+             return _baseCache.issuesByIssueID[issueID];
+           }).filter(Boolean);
+         }; // `focusIssue()`
+         // Adjusts the map to focus on the given issue.
+         // (requires the issue to have a reasonable extent defined)
+         //
+         // Arguments
+         //   `issue` - the issue to focus on
+         //

 
 
 
 

-       rendererBackgroundSource.Bing = function(data, dispatch) {
-           // http://msdn.microsoft.com/en-us/library/ff701716.aspx
-           // http://msdn.microsoft.com/en-us/library/ff701701.aspx
+         validator.focusIssue = function (issue) {
+           // Note that we use `context.graph()`/`context.hasEntity()` here, not `cache.graph`,
+           // because that is the graph that the calling code will be using.
+           var graph = context.graph();
+           var selectID;
+           var focusCenter; // Try to focus the map at the center of the issue..

 
 

-           data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&mkt=en-gb&n=z';
+           var issueExtent = issue.extent(graph);

 
 

-           var bing = rendererBackgroundSource(data);
-           // var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // P2, JOSM, etc
-           var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q';    // iD
+           if (issueExtent) {
+             focusCenter = issueExtent.center();
+           } // Try to select the first entity in the issue..

 
 
 
 

-           var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&key=' + key;
-           var cache = {};
-           var inflight = {};
-           var providers = [];
+           if (issue.entityIds && issue.entityIds.length) {
+             selectID = issue.entityIds[0]; // If a relation, focus on one of its members instead.
+             // Otherwise we might be focusing on a part of map where the relation is not visible.

 
 

-           d3_json(url)
-               .then(function(json) {
-                   providers = json.resourceSets[0].resources[0].imageryProviders.map(function(provider) {
-                       return {
-                           attribution: provider.attribution,
-                           areas: provider.coverageAreas.map(function(area) {
-                               return {
-                                   zoom: [area.zoomMin, area.zoomMax],
-                                   extent: geoExtent([area.bbox[1], area.bbox[0]], [area.bbox[3], area.bbox[2]])
-                               };
-                           })
-                       };
-                   });
-                   dispatch.call('change');
-               })
-               .catch(function() {
-                   /* ignore */
+             if (selectID && selectID.charAt(0) === 'r') {
+               // relation
+               var ids = utilEntityAndDeepMemberIDs([selectID], graph);
+               var nodeID = ids.find(function (id) {
+                 return id.charAt(0) === 'n' && graph.hasEntity(id);

                });
 
                });
 

+               if (!nodeID) {
+                 // relation has no downloaded nodes to focus on
+                 var wayID = ids.find(function (id) {
+                   return id.charAt(0) === 'w' && graph.hasEntity(id);
+                 });

 
 

-           bing.copyrightNotices = function(zoom, extent) {
-               zoom = Math.min(zoom, 21);
-               return providers.filter(function(provider) {
-                   return provider.areas.some(function(area) {
-                       return extent.intersects(area.extent) &&
-                           area.zoom[0] <= zoom &&
-                           area.zoom[1] >= zoom;
-                   });
-               }).map(function(provider) {
-                   return provider.attribution;
-               }).join(', ');
-           };
-
-
-           bing.getMetadata = function(center, tileCoord, callback) {
-               var tileID = tileCoord.slice(0, 3).join('/');
-               var zoom = Math.min(tileCoord[2], 21);
-               var centerPoint = center[1] + ',' + center[0];  // lat,lng
-               var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint +
-                       '?zl=' + zoom + '&key=' + key;
-
-               if (inflight[tileID]) { return; }
-
-               if (!cache[tileID]) {
-                   cache[tileID] = {};
-               }
-               if (cache[tileID] && cache[tileID].metadata) {
-                   return callback(null, cache[tileID].metadata);
+                 if (wayID) {
+                   nodeID = graph.entity(wayID).first(); // focus on the first node of this way
+                 }

                }
 
                }
 

-               inflight[tileID] = true;
-               d3_json(url)
-                   .then(function(result) {
-                       delete inflight[tileID];
-                       if (!result) {
-                           throw new Error('Unknown Error');
-                       }
-                       var vintage = {
-                           start: localeDateString(result.resourceSets[0].resources[0].vintageStart),
-                           end: localeDateString(result.resourceSets[0].resources[0].vintageEnd)
-                       };
-                       vintage.range = vintageRange(vintage);
-
-                       var metadata = { vintage: vintage };
-                       cache[tileID].metadata = metadata;
-                       if (callback) { callback(null, metadata); }
-                   })
-                   .catch(function(err) {
-                       delete inflight[tileID];
-                       if (callback) { callback(err.message); }
-                   });
-           };
-
-
-           bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
-
-
-           return bing;
-       };
-
+               if (nodeID) {
+                 focusCenter = graph.entity(nodeID).loc;
+               }
+             }
+           }

 
 

+           if (focusCenter) {
+             // Adjust the view
+             var setZoom = Math.max(context.map().zoom(), 19);
+             context.map().unobscuredCenterZoomEase(focusCenter, setZoom);
+           }

 
 

-       rendererBackgroundSource.Esri = function(data) {
-           // in addition to using the tilemap at zoom level 20, overzoom real tiles - #4327 (deprecated technique, but it works)
-           if (data.template.match(/blankTile/) === null) {
-               data.template = data.template + '?blankTile=false';
+           if (selectID) {
+             // Enter select mode
+             window.setTimeout(function () {
+               context.enter(modeSelect(context, [selectID]));
+               dispatch.call('focusedIssue', _this, issue);
+             }, 250); // after ease

            }
            }

+         }; // `getIssuesBySeverity()`
+         // Gets the issues then groups them by error/warning
+         // (This just calls getIssues, then puts issues in groups)
+         //
+         // Arguments
+         //   `options` - (see `getIssues`)
+         // Returns
+         //   Object result like:
+         //   {
+         //     error:    Array of errors,
+         //     warning:  Array of warnings
+         //   }
+         //

 
 

-           var esri = rendererBackgroundSource(data);
-           var cache = {};
-           var inflight = {};
-           var _prevCenter;

 
 

-           // use a tilemap service to set maximum zoom for esri tiles dynamically
-           // https://developers.arcgis.com/documentation/tiled-elevation-service/
-           esri.fetchTilemap = function(center) {
-               // skip if we have already fetched a tilemap within 5km
-               if (_prevCenter && geoSphericalDistance(center, _prevCenter) < 5000) { return; }
-               _prevCenter = center;
+         validator.getIssuesBySeverity = function (options) {
+           var groups = utilArrayGroupBy(validator.getIssues(options), 'severity');
+           groups.error = groups.error || [];
+           groups.warning = groups.warning || [];
+           return groups;
+         }; // `getEntityIssues()`
+         // Gets the issues that the given entity IDs have in common, matching the given options
+         // (This just calls getIssues, then filters for the given entity IDs)
+         // The issues are sorted for relevance
+         //
+         // Arguments
+         //   `entityIDs` - Array or Set of entityIDs to get issues for
+         //   `options` - (see `getIssues`)
+         // Returns
+         //   An Array containing the issues
+         //

 
 

-               // tiles are available globally to zoom level 19, afterward they may or may not be present
-               var z = 20;

 
 

-               // first generate a random url using the template
-               var dummyUrl = esri.url([1,2,3]);
+         validator.getSharedEntityIssues = function (entityIDs, options) {
+           var orderedIssueTypes = [// Show some issue types in a particular order:
+           'missing_tag', 'missing_role', // - missing data first
+           'outdated_tags', 'mismatched_geometry', // - identity issues
+           'crossing_ways', 'almost_junction', // - geometry issues where fixing them might solve connectivity issues
+           'disconnected_way', 'impossible_oneway' // - finally connectivity issues
+           ];
+           var allIssues = validator.getIssues(options);
+           var forEntityIDs = new Set(entityIDs);
+           return allIssues.filter(function (issue) {
+             return (issue.entityIds || []).some(function (entityID) {
+               return forEntityIDs.has(entityID);
+             });
+           }).sort(function (issue1, issue2) {
+             if (issue1.type === issue2.type) {
+               // issues of the same type, sort deterministically
+               return issue1.id < issue2.id ? -1 : 1;
+             }

 
 

-               // calculate url z/y/x from the lat/long of the center of the map
-               var x = (Math.floor((center[0] + 180) / 360 * Math.pow(2, z)));
-               var y = (Math.floor((1 - Math.log(Math.tan(center[1] * Math.PI / 180) + 1 / Math.cos(center[1] * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, z)));
+             var index1 = orderedIssueTypes.indexOf(issue1.type);
+             var index2 = orderedIssueTypes.indexOf(issue2.type);

 
 

-               // fetch an 8x8 grid to leverage cache
-               var tilemapUrl = dummyUrl.replace(/tile\/[0-9]+\/[0-9]+\/[0-9]+\?blankTile=false/, 'tilemap') + '/' + z + '/' + y + '/' + x + '/8/8';
+             if (index1 !== -1 && index2 !== -1) {
+               // both issue types have explicit sort orders
+               return index1 - index2;
+             } else if (index1 === -1 && index2 === -1) {
+               // neither issue type has an explicit sort order, sort by type
+               return issue1.type < issue2.type ? -1 : 1;
+             } else {
+               // order explicit types before everything else
+               return index1 !== -1 ? -1 : 1;
+             }
+           });
+         }; // `getEntityIssues()`
+         // Get an array of detected issues for the given entityID.
+         // (This just calls getSharedEntityIssues for a single entity)
+         //
+         // Arguments
+         //   `entityID` - the entity ID to get the issues for
+         //   `options` - (see `getIssues`)
+         // Returns
+         //   An Array containing the issues
+         //

 
 

-               // make the request and introspect the response from the tilemap server
-               d3_json(tilemapUrl)
-                   .then(function(tilemap) {
-                       if (!tilemap) {
-                           throw new Error('Unknown Error');
-                       }
-                       var hasTiles = true;
-                       for (var i = 0; i < tilemap.data.length; i++) {
-                           // 0 means an individual tile in the grid doesn't exist
-                           if (!tilemap.data[i]) {
-                               hasTiles = false;
-                               break;
-                           }
-                       }

 
 

-                       // if any tiles are missing at level 20 we restrict maxZoom to 19
-                       esri.zoomExtent[1] = (hasTiles ? 22 : 19);
-                   })
-                   .catch(function() {
-                       /* ignore */
-                   });
-           };
+         validator.getEntityIssues = function (entityID, options) {
+           return validator.getSharedEntityIssues([entityID], options);
+         }; // `getRuleKeys()`
+         //
+         // Returns
+         //   An Array containing the rule keys
+         //

 
 
 
 

-           esri.getMetadata = function(center, tileCoord, callback) {
-               var tileID = tileCoord.slice(0, 3).join('/');
-               var zoom = Math.min(tileCoord[2], esri.zoomExtent[1]);
-               var centerPoint = center[0] + ',' + center[1];  // long, lat (as it should be)
-               var unknown = _t('info_panels.background.unknown');
-               var metadataLayer;
-               var vintage = {};
-               var metadata = {};
+         validator.getRuleKeys = function () {
+           return Object.keys(_rules);
+         }; // `isRuleEnabled()`
+         //
+         // Arguments
+         //   `key` - the rule to check (e.g. 'crossing_ways')
+         // Returns
+         //   `true`/`false`
+         //

 
 

-               if (inflight[tileID]) { return; }

 
 

-               switch (true) {
-                   case (zoom >= 20 && esri.id === 'EsriWorldImageryClarity'):
-                       metadataLayer = 4;
-                       break;
-                   case zoom >= 19:
-                       metadataLayer = 3;
-                       break;
-                   case zoom >= 17:
-                       metadataLayer = 2;
-                       break;
-                   case zoom >= 13:
-                       metadataLayer = 0;
-                       break;
-                   default:
-                       metadataLayer = 99;
-               }
+         validator.isRuleEnabled = function (key) {
+           return !_disabledRules[key];
+         }; // `toggleRule()`
+         // Toggles a single validation rule,
+         // then reruns the validation so that the user sees something happen in the UI
+         //
+         // Arguments
+         //   `key` - the rule to toggle (e.g. 'crossing_ways')
+         //

 
 

-               var url;
-               // build up query using the layer appropriate to the current zoom
-               if (esri.id === 'EsriWorldImagery') {
-                   url = 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/';
-               } else if (esri.id === 'EsriWorldImageryClarity') {
-                   url = 'https://serviceslab.arcgisonline.com/arcgis/rest/services/Clarity_World_Imagery/MapServer/';
-               }

 
 

-               url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
+         validator.toggleRule = function (key) {
+           if (_disabledRules[key]) {
+             delete _disabledRules[key];
+           } else {
+             _disabledRules[key] = true;
+           }

 
 

-               if (!cache[tileID]) {
-                   cache[tileID] = {};
-               }
-               if (cache[tileID] && cache[tileID].metadata) {
-                   return callback(null, cache[tileID].metadata);
-               }
+           corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
+           validator.validate();
+         }; // `disableRules()`
+         // Disables given validation rules,
+         // then reruns the validation so that the user sees something happen in the UI
+         //
+         // Arguments
+         //   `keys` - Array or Set containing rule keys to disable
+         //

 
 

-               // accurate metadata is only available >= 13
-               if (metadataLayer === 99) {
-                   vintage = {
-                       start: null,
-                       end: null,
-                       range: null
-                   };
-                   metadata = {
-                       vintage: null,
-                       source: unknown,
-                       description: unknown,
-                       resolution: unknown,
-                       accuracy: unknown
-                   };

 
 

-                   callback(null, metadata);
+         validator.disableRules = function (keys) {
+           _disabledRules = {};
+           keys.forEach(function (k) {
+             return _disabledRules[k] = true;
+           });
+           corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
+           validator.validate();
+         }; // `ignoreIssue()`
+         // Don't show the given issue in lists
+         //
+         // Arguments
+         //   `issueID` - the issueID
+         //

 
 

-               } else {
-                   inflight[tileID] = true;
-                   d3_json(url)
-                       .then(function(result) {
-                           delete inflight[tileID];
-                           if (!result) {
-                               throw new Error('Unknown Error');
-                           } else if (result.features && result.features.length < 1) {
-                               throw new Error('No Results');
-                           } else if (result.error && result.error.message) {
-                               throw new Error(result.error.message);
-                           }

 
 

-                           // pass through the discrete capture date from metadata
-                           var captureDate = localeDateString(result.features[0].attributes.SRC_DATE2);
-                           vintage = {
-                               start: captureDate,
-                               end: captureDate,
-                               range: captureDate
-                           };
-                           metadata = {
-                               vintage: vintage,
-                               source: clean(result.features[0].attributes.NICE_NAME),
-                               description: clean(result.features[0].attributes.NICE_DESC),
-                               resolution: clean(+parseFloat(result.features[0].attributes.SRC_RES).toFixed(4)),
-                               accuracy: clean(+parseFloat(result.features[0].attributes.SRC_ACC).toFixed(4))
-                           };
-
-                           // append units - meters
-                           if (isFinite(metadata.resolution)) {
-                               metadata.resolution += ' m';
-                           }
-                           if (isFinite(metadata.accuracy)) {
-                               metadata.accuracy += ' m';
-                           }
+         validator.ignoreIssue = function (issueID) {
+           _ignoredIssueIDs.add(issueID);
+         }; // `validate()`
+         // Validates anything that has changed in the head graph since the last time it was run.
+         // (head graph contains user's edits)
+         //
+         // Returns
+         //   A Promise fulfilled when the validation has completed and then dispatches a `validated` event.
+         //   This may take time but happen in the background during browser idle time.
+         //

 
 

-                           cache[tileID].metadata = metadata;
-                           if (callback) { callback(null, metadata); }
-                       })
-                       .catch(function(err) {
-                           delete inflight[tileID];
-                           if (callback) { callback(err.message); }
-                       });
-               }

 
 

+         validator.validate = function () {
+           // Make sure the caches have graphs assigned to them.
+           // (we don't do this in `reset` because context is still resetting things and `history.base()` is unstable then)
+           var baseGraph = context.history().base();
+           if (!_headCache.graph) _headCache.graph = baseGraph;
+           if (!_baseCache.graph) _baseCache.graph = baseGraph;
+           var prevGraph = _headCache.graph;
+           var currGraph = context.graph();

 
 

-               function clean(val) {
-                   return String(val).trim() || unknown;
-               }
-           };
+           if (currGraph === prevGraph) {
+             // _headCache.graph is current - we are caught up
+             _headIsCurrent = true;
+             dispatch.call('validated');
+             return Promise.resolve();
+           }

 
 

-           return esri;
-       };
+           if (_headPromise) {
+             // Validation already in process, but we aren't caught up to current
+             _headIsCurrent = false; // We will need to catch up after the validation promise fulfills

 
 

+             return _headPromise;
+           } // If we get here, its time to start validating stuff.

 
 

-       rendererBackgroundSource.None = function() {
-           var source = rendererBackgroundSource({ id: 'none', template: '' });

 
 

+           _headCache.graph = currGraph; // take snapshot

 
 

-           source.name = function() {
-               return _t('background.none');
-           };
+           _completeDiff = context.history().difference().complete();
+           var incrementalDiff = coreDifference(prevGraph, currGraph);
+           var entityIDs = Object.keys(incrementalDiff.complete());
+           entityIDs = _headCache.withAllRelatedEntities(entityIDs); // expand set

 
 

+           if (!entityIDs.size) {
+             dispatch.call('validated');
+             return Promise.resolve();
+           }

 
 

-           source.imageryUsed = function() {
-               return null;
-           };
+           _headPromise = validateEntitiesAsync(entityIDs, _headCache).then(function () {
+             return updateResolvedIssues(entityIDs);
+           }).then(function () {
+             return dispatch.call('validated');
+           })["catch"](function () {
+             /* ignore */
+           }).then(function () {
+             _headPromise = null;

 
 

+             if (!_headIsCurrent) {
+               validator.validate(); // run it again to catch up to current graph
+             }
+           });
+           return _headPromise;
+         }; // register event handlers:
+         // WHEN TO RUN VALIDATION:
+         // When history changes:
+
+
+         context.history().on('restore.validator', validator.validate) // on restore saved history
+         .on('undone.validator', validator.validate) // on undo
+         .on('redone.validator', validator.validate) // on redo
+         .on('reset.validator', function () {
+           // on history reset - happens after save, or enter/exit walkthrough
+           reset(false); // cached issues aren't valid any longer if the history has been reset
+
+           validator.validate();
+         }); // but not on 'change' (e.g. while drawing)
+         // When user changes editing modes (to catch recent changes e.g. drawing)
+
+         context.on('exit.validator', validator.validate); // When merging fetched data, validate base graph:
+
+         context.history().on('merge.validator', function (entities) {
+           if (!entities) return; // Make sure the caches have graphs assigned to them.
+           // (we don't do this in `reset` because context is still resetting things and `history.base()` is unstable then)
+
+           var baseGraph = context.history().base();
+           if (!_headCache.graph) _headCache.graph = baseGraph;
+           if (!_baseCache.graph) _baseCache.graph = baseGraph;
+           var entityIDs = entities.map(function (entity) {
+             return entity.id;
+           });
+           entityIDs = _baseCache.withAllRelatedEntities(entityIDs); // expand set
+
+           validateEntitiesAsync(entityIDs, _baseCache);
+         }); // `validateEntity()`   (private)
+         // Runs all validation rules on a single entity.
+         // Some things to note:
+         //  - Graph is passed in from whenever the validation was started.  Validators shouldn't use
+         //   `context.graph()` because this all happens async, and the graph might have changed
+         //   (for example, nodes getting deleted before the validation can run)
+         //  - Validator functions may still be waiting on something and return a "provisional" result.
+         //    In this situation, we will schedule to revalidate the entity sometime later.
+         //
+         // Arguments
+         //   `entity` - The entity
+         //   `graph` - graph containing the entity
+         //
+         // Returns
+         //   Object result like:
+         //   {
+         //     issues:       Array of detected issues
+         //     provisional:  `true` if provisional result, `false` if final result
+         //   }
+         //

 
 

-           source.area = function() {
-               return -1;  // sources in background pane are sorted by area
+         function validateEntity(entity, graph) {
+           var result = {
+             issues: [],
+             provisional: false

            };
            };

+           Object.keys(_rules).forEach(runValidation); // run all rules

 
 

+           return result; // runs validation and appends resulting issues

 
 

-           return source;
-       };
+           function runValidation(key) {
+             var fn = _rules[key];

 
 

+             if (typeof fn !== 'function') {
+               console.error('no such validation rule = ' + key); // eslint-disable-line no-console

 
 

-       rendererBackgroundSource.Custom = function(template) {
-           var source = rendererBackgroundSource({ id: 'custom', template: template });
+               return;
+             }

 
 

+             var detected = fn(entity, graph);

 
 

-           source.name = function() {
-               return _t('background.custom');
-           };
+             if (detected.provisional) {
+               // this validation should be run again later
+               result.provisional = true;
+             }

 
 

+             detected = detected.filter(applySeverityOverrides);
+             result.issues = result.issues.concat(detected); // If there are any override rules that match the issue type/subtype,
+             // adjust severity (or disable it) and keep/discard as quickly as possible.

 
 

-           source.imageryUsed = function() {
-               // sanitize personal connection tokens - #6801
-               var cleaned = source.template();
+             function applySeverityOverrides(issue) {
+               var type = issue.type;
+               var subtype = issue.subtype || '';
+               var i;

 
 

-               // from query string parameters
-               if (cleaned.indexOf('?') !== -1) {
-                   var parts = cleaned.split('?', 2);
-                   var qs = utilStringQs(parts[1]);
+               for (i = 0; i < _errorOverrides.length; i++) {
+                 if (_errorOverrides[i].type.test(type) && _errorOverrides[i].subtype.test(subtype)) {
+                   issue.severity = 'error';
+                   return true;
+                 }
+               }

 
 

-                   ['access_token', 'connectId', 'token'].forEach(function(param) {
-                       if (qs[param]) {
-                           qs[param] = '{apikey}';
-                       }
-                   });
-                   cleaned = parts[0] + '?' + utilQsString(qs, true);  // true = soft encode
+               for (i = 0; i < _warningOverrides.length; i++) {
+                 if (_warningOverrides[i].type.test(type) && _warningOverrides[i].subtype.test(subtype)) {
+                   issue.severity = 'warning';
+                   return true;
+                 }

                }
 
                }
 

-               // from wms/wmts api path parameters
-               cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
+               for (i = 0; i < _disableOverrides.length; i++) {
+                 if (_disableOverrides[i].type.test(type) && _disableOverrides[i].subtype.test(subtype)) {
+                   return false;
+                 }
+               }

 
 

-               return 'Custom (' + cleaned + ' )';
-           };
+               return true;
+             }
+           }
+         } // `updateResolvedIssues()`   (private)
+         // Determine if any issues were resolved for the given entities.
+         // This is called by `validate()` after validation of the head graph
+         //
+         // Give the user credit for fixing an issue if:
+         // - the issue is in the base cache
+         // - the issue is not in the head cache
+         // - the user did something to one of the entities involved in the issue
+         //
+         // Arguments
+         //   `entityIDs` - Array or Set containing entity IDs.
+         //

 
 
 
 

-           source.area = function() {
-               return -2;  // sources in background pane are sorted by area
-           };
+         function updateResolvedIssues(entityIDs) {
+           entityIDs.forEach(function (entityID) {
+             var baseIssues = _baseCache.issuesByEntityID[entityID];
+             if (!baseIssues) return;
+             baseIssues.forEach(function (issueID) {
+               // Check if the user did something to one of the entities involved in this issue.
+               // (This issue could involve multiple entities, e.g. disconnected routable features)
+               var issue = _baseCache.issuesByIssueID[issueID];
+               var userModified = (issue.entityIds || []).some(function (id) {
+                 return _completeDiff.hasOwnProperty(id);
+               });

 
 

+               if (userModified && !_headCache.issuesByIssueID[issueID]) {
+                 // issue seems fixed
+                 _resolvedIssueIDs.add(issueID);
+               } else {
+                 // issue still not resolved
+                 _resolvedIssueIDs["delete"](issueID); // (did undo, or possibly fixed and then re-caused the issue)

 
 

-           return source;
-       };
+               }
+             });
+           });
+         } // `validateEntitiesAsync()`   (private)
+         // Schedule validation for many entities.
+         //
+         // Arguments
+         //   `entityIDs` - Array or Set containing entityIDs.
+         //   `graph` - the graph to validate that contains those entities
+         //   `cache` - the cache to store results in (_headCache or _baseCache)
+         //
+         // Returns
+         //   A Promise fulfilled when the validation has completed.
+         //   This may take time but happen in the background during browser idle time.
+         //

 
 

-       function rendererTileLayer(context) {
-           var transformProp = utilPrefixCSSProperty('Transform');
-           var tiler = utilTiler();

 
 

-           var _tileSize = 256;
-           var _projection;
-           var _cache = {};
-           var _tileOrigin;
-           var _zoom;
-           var _source;
+         function validateEntitiesAsync(entityIDs, cache) {
+           // Enqueue the work
+           var jobs = Array.from(entityIDs).map(function (entityID) {
+             if (cache.queuedEntityIDs.has(entityID)) return null; // queued already

 
 

+             cache.queuedEntityIDs.add(entityID); // Clear caches for existing issues related to this entity

 
 

-           function tileSizeAtZoom(d, z) {
-               var EPSILON = 0.002;    // close seams
-               return ((_tileSize * Math.pow(2, z - d[2])) / _tileSize) + EPSILON;
-           }
+             cache.uncacheEntityID(entityID);
+             return function () {
+               cache.queuedEntityIDs["delete"](entityID);
+               var graph = cache.graph;
+               if (!graph) return; // was reset?

 
 

+               var entity = graph.hasEntity(entityID); // Sanity check: don't validate deleted entities

 
 

-           function atZoom(t, distance) {
-               var power = Math.pow(2, distance);
-               return [
-                   Math.floor(t[0] * power),
-                   Math.floor(t[1] * power),
-                   t[2] + distance
-               ];
-           }
+               if (!entity) return; // detect new issues and update caches

 
 

+               var result = validateEntity(entity, graph);

 
 

-           function lookUp(d) {
-               for (var up = -1; up > -d[2]; up--) {
-                   var tile = atZoom(d, up);
-                   if (_cache[_source.url(tile)] !== false) {
-                       return tile;
-                   }
+               if (result.provisional) {
+                 // provisional result
+                 cache.provisionalEntityIDs.add(entityID); // we'll need to revalidate this entity again later

                }
                }

-           }

 
 

-
-           function uniqueBy(a, n) {
-               var o = [];
-               var seen = {};
-               for (var i = 0; i < a.length; i++) {
-                   if (seen[a[i][n]] === undefined) {
-                       o.push(a[i]);
-                       seen[a[i][n]] = true;
-                   }
-               }
-               return o;
-           }
+               cache.cacheIssues(result.issues); // update cache
+             };
+           }).filter(Boolean); // Perform the work in chunks.
+           // Because this will happen during idle callbacks, we want to choose a chunk size
+           // that won't make the browser stutter too badly.
+
+           cache.queue = cache.queue.concat(utilArrayChunk(jobs, 100)); // Perform the work
+
+           if (cache.queuePromise) return cache.queuePromise;
+           cache.queuePromise = processQueue(cache).then(function () {
+             return revalidateProvisionalEntities(cache);
+           })["catch"](function () {
+             /* ignore */
+           })["finally"](function () {
+             return cache.queuePromise = null;
+           });
+           return cache.queuePromise;
+         } // `revalidateProvisionalEntities()`   (private)
+         // Sometimes a validator will return a "provisional" result.
+         // In this situation, we'll need to revalidate the entity later.
+         // This function waits a delay, then places them back into the validation queue.
+         //
+         // Arguments
+         //   `cache` - The cache (_headCache or _baseCache)
+         //

 
 
 
 

-           function addSource(d) {
-               d.push(_source.url(d));
-               return d;
-           }
+         function revalidateProvisionalEntities(cache) {
+           if (!cache.provisionalEntityIDs.size) return; // nothing to do

 
 

+           var handle = window.setTimeout(function () {
+             _deferredST["delete"](handle);

 
 

-           // Update tiles based on current state of `projection`.
-           function background(selection) {
-               _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+             if (!cache.provisionalEntityIDs.size) return; // nothing to do

 
 

-               var pixelOffset;
-               if (_source) {
-                   pixelOffset = [
-                       _source.offset()[0] * Math.pow(2, _zoom),
-                       _source.offset()[1] * Math.pow(2, _zoom)
-                   ];
-               } else {
-                   pixelOffset = [0, 0];
-               }
+             validateEntitiesAsync(Array.from(cache.provisionalEntityIDs), cache);
+           }, RETRY);

 
 

-               var translate = [
-                   _projection.translate()[0] + pixelOffset[0],
-                   _projection.translate()[1] + pixelOffset[1]
-               ];
+           _deferredST.add(handle);
+         } // `processQueue(queue)`   (private)
+         // Process the next chunk of deferred validation work
+         //
+         // Arguments
+         //   `cache` - The cache (_headCache or _baseCache)
+         //
+         // Returns
+         //   A Promise fulfilled when the validation has completed.
+         //   This may take time but happen in the background during browser idle time.
+         //

 
 

-               tiler
-                   .scale(_projection.scale() * 2 * Math.PI)
-                   .translate(translate);

 
 

-               _tileOrigin = [
-                   _projection.scale() * Math.PI - translate[0],
-                   _projection.scale() * Math.PI - translate[1]
-               ];
+         function processQueue(cache) {
+           // console.log(`${cache.which} queue length ${cache.queue.length}`);
+           if (!cache.queue.length) return Promise.resolve(); // we're done

 
 

-               render(selection);
-           }
+           var chunk = cache.queue.pop();
+           return new Promise(function (resolvePromise) {
+             var handle = window.requestIdleCallback(function () {
+               _deferredRIC["delete"](handle); // const t0 = performance.now();

 
 
 
 

-           // Derive the tiles onscreen, remove those offscreen and position them.
-           // Important that this part not depend on `_projection` because it's
-           // rentered when tiles load/error (see #644).
-           function render(selection) {
-               if (!_source) { return; }
-               var requests = [];
-               var showDebug = context.getDebug('tile') && !_source.overlay;
+               chunk.forEach(function (job) {
+                 return job();
+               }); // const t1 = performance.now();
+               // console.log('chunk processed in ' + (t1 - t0) + ' ms');

 
 

-               if (_source.validZoom(_zoom)) {
-                   tiler.skipNullIsland(!!_source.overlay);
+               resolvePromise();
+             });

 
 

-                   tiler().forEach(function(d) {
-                       addSource(d);
-                       if (d[3] === '') { return; }
-                       if (typeof d[3] !== 'string') { return; } // Workaround for #2295
-                       requests.push(d);
-                       if (_cache[d[3]] === false && lookUp(d)) {
-                           requests.push(addSource(lookUp(d)));
-                       }
-                   });
+             _deferredRIC.add(handle);
+           }).then(function () {
+             // dispatch an event sometimes to redraw various UI things
+             if (cache.queue.length % 25 === 0) dispatch.call('validated');
+           }).then(function () {
+             return processQueue(cache);
+           });
+         }

 
 

-                   requests = uniqueBy(requests, 3).filter(function(r) {
-                       // don't re-request tiles which have failed in the past
-                       return _cache[r[3]] !== false;
-                   });
-               }
+         return validator;
+       } // `validationCache()`   (private)
+       // Creates a cache to store validation state
+       // We create 2 of these:
+       //   `_baseCache` for validation on the base graph (unedited)
+       //   `_headCache` for validation on the head graph (user edits applied)
+       //
+       // Arguments
+       //   `which` - just a String 'base' or 'head' to keep track of it
+       //

 
 

-               function load(d) {
-                   _cache[d[3]] = true;
-                   select(this)
-                       .on('error', null)
-                       .on('load', null)
-                       .classed('tile-loaded', true);
-                   render(selection);
-               }
+       function validationCache(which) {
+         var cache = {
+           which: which,
+           graph: null,
+           queue: [],
+           queuePromise: null,
+           queuedEntityIDs: new Set(),
+           provisionalEntityIDs: new Set(),
+           issuesByIssueID: {},
+           // issue.id -> issue
+           issuesByEntityID: {} // entity.id -> Set(issue.id)

 
 

-               function error(d) {
-                   _cache[d[3]] = false;
-                   select(this)
-                       .on('error', null)
-                       .on('load', null)
-                       .remove();
-                   render(selection);
-               }
+         };

 
 

-               function imageTransform(d) {
-                   var ts = _tileSize * Math.pow(2, _zoom - d[2]);
-                   var scale = tileSizeAtZoom(d, _zoom);
-                   return 'translate(' +
-                       ((d[0] * ts) - _tileOrigin[0]) + 'px,' +
-                       ((d[1] * ts) - _tileOrigin[1]) + 'px) ' +
-                       'scale(' + scale + ',' + scale + ')';
-               }
+         cache.cacheIssue = function (issue) {
+           (issue.entityIds || []).forEach(function (entityID) {
+             if (!cache.issuesByEntityID[entityID]) {
+               cache.issuesByEntityID[entityID] = new Set();
+             }

 
 

-               function tileCenter(d) {
-                   var ts = _tileSize * Math.pow(2, _zoom - d[2]);
-                   return [
-                       ((d[0] * ts) - _tileOrigin[0] + (ts / 2)),
-                       ((d[1] * ts) - _tileOrigin[1] + (ts / 2))
-                   ];
-               }
+             cache.issuesByEntityID[entityID].add(issue.id);
+           });
+           cache.issuesByIssueID[issue.id] = issue;
+         };

 
 

-               function debugTransform(d) {
-                   var coord = tileCenter(d);
-                   return 'translate(' + coord[0] + 'px,' + coord[1] + 'px)';
-               }
+         cache.uncacheIssue = function (issue) {
+           (issue.entityIds || []).forEach(function (entityID) {
+             if (cache.issuesByEntityID[entityID]) {
+               cache.issuesByEntityID[entityID]["delete"](issue.id);
+             }
+           });
+           delete cache.issuesByIssueID[issue.id];
+         };

 
 

+         cache.cacheIssues = function (issues) {
+           issues.forEach(cache.cacheIssue);
+         };

 
 

-               // Pick a representative tile near the center of the viewport
-               // (This is useful for sampling the imagery vintage)
-               var dims = tiler.size();
-               var mapCenter = [dims[0] / 2, dims[1] / 2];
-               var minDist = Math.max(dims[0], dims[1]);
-               var nearCenter;
+         cache.uncacheIssues = function (issues) {
+           issues.forEach(cache.uncacheIssue);
+         };

 
 

-               requests.forEach(function(d) {
-                   var c = tileCenter(d);
-                   var dist = geoVecLength(c, mapCenter);
-                   if (dist < minDist) {
-                       minDist = dist;
-                       nearCenter = d;
-                   }
-               });
+         cache.uncacheIssuesOfType = function (type) {
+           var issuesOfType = Object.values(cache.issuesByIssueID).filter(function (issue) {
+             return issue.type === type;
+           });
+           cache.uncacheIssues(issuesOfType);
+         }; // Remove a single entity and all its related issues from the caches

 
 
 
 

-               var image = selection.selectAll('img')
-                   .data(requests, function(d) { return d[3]; });
+         cache.uncacheEntityID = function (entityID) {
+           var entityIssueIDs = cache.issuesByEntityID[entityID];

 
 

-               image.exit()
-                   .style(transformProp, imageTransform)
-                   .classed('tile-removing', true)
-                   .classed('tile-center', false)
-                   .each(function() {
-                       var tile = select(this);
-                       window.setTimeout(function() {
-                           if (tile.classed('tile-removing')) {
-                               tile.remove();
-                           }
-                       }, 300);
-                   });
+           if (entityIssueIDs) {
+             entityIssueIDs.forEach(function (issueID) {
+               var issue = cache.issuesByIssueID[issueID];

 
 

-               image.enter()
-                 .append('img')
-                   .attr('class', 'tile')
-                   .attr('draggable', 'false')
-                   .style('width', _tileSize + 'px')
-                   .style('height', _tileSize + 'px')
-                   .attr('src', function(d) { return d[3]; })
-                   .on('error', error)
-                   .on('load', load)
-                 .merge(image)
-                   .style(transformProp, imageTransform)
-                   .classed('tile-debug', showDebug)
-                   .classed('tile-removing', false)
-                   .classed('tile-center', function(d) { return d === nearCenter; });
-
-
-
-               var debug = selection.selectAll('.tile-label-debug')
-                   .data(showDebug ? requests : [], function(d) { return d[3]; });
-
-               debug.exit()
-                   .remove();
-
-               if (showDebug) {
-                   var debugEnter = debug.enter()
-                       .append('div')
-                       .attr('class', 'tile-label-debug');
-
-                   debugEnter
-                       .append('div')
-                       .attr('class', 'tile-label-debug-coord');
-
-                   debugEnter
-                       .append('div')
-                       .attr('class', 'tile-label-debug-vintage');
-
-                   debug = debug.merge(debugEnter);
-
-                   debug
-                       .style(transformProp, debugTransform);
-
-                   debug
-                       .selectAll('.tile-label-debug-coord')
-                       .text(function(d) { return d[2] + ' / ' + d[0] + ' / ' + d[1]; });
-
-                   debug
-                       .selectAll('.tile-label-debug-vintage')
-                       .each(function(d) {
-                           var span = select(this);
-                           var center = context.projection.invert(tileCenter(d));
-                           _source.getMetadata(center, d, function(err, result) {
-                               span.text((result && result.vintage && result.vintage.range) ||
-                                   _t('info_panels.background.vintage') + ': ' + _t('info_panels.background.unknown')
-                               );
-                           });
-                       });
+               if (issue) {
+                 cache.uncacheIssue(issue);
+               } else {
+                 // shouldn't happen, clean up
+                 delete cache.issuesByIssueID[issueID];

                }
                }

-
+             });

            }
 
            }
 

-
-           background.projection = function(val) {
-               if (!arguments.length) { return _projection; }
-               _projection = val;
-               return background;
-           };
+           delete cache.issuesByEntityID[entityID];
+           cache.provisionalEntityIDs["delete"](entityID);
+         }; // Return the expandeded set of entityIDs related to issues for the given entityIDs
+         //
+         // Arguments
+         //   `entityIDs` - Array or Set containing entityIDs.
+         //

 
 
 
 

-           background.dimensions = function(val) {
-               if (!arguments.length) { return tiler.size(); }
-               tiler.size(val);
-               return background;
-           };
+         cache.withAllRelatedEntities = function (entityIDs) {
+           var result = new Set();
+           (entityIDs || []).forEach(function (entityID) {
+             result.add(entityID); // include self

 
 

+             var entityIssueIDs = cache.issuesByEntityID[entityID];

 
 

-           background.source = function(val) {
-               if (!arguments.length) { return _source; }
-               _source = val;
-               _tileSize = _source.tileSize;
-               _cache = {};
-               tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
-               return background;
-           };
+             if (entityIssueIDs) {
+               entityIssueIDs.forEach(function (issueID) {
+                 var issue = cache.issuesByIssueID[issueID];

 
 

+                 if (issue) {
+                   (issue.entityIds || []).forEach(function (relatedID) {
+                     return result.add(relatedID);
+                   });
+                 } else {
+                   // shouldn't happen, clean up
+                   delete cache.issuesByIssueID[issueID];
+                 }
+               });
+             }
+           });
+           return result;
+         };

 
 

-           return background;
+         return cache;

        }
 
        }
 

-       var _imageryIndex = null;
-
-       function rendererBackground(context) {
-         var dispatch$1 = dispatch('change');
-         var detected = utilDetect();
-         var baseLayer = rendererTileLayer(context).projection(context.projection);
-         var _isValid = true;
-         var _overlayLayers = [];
-         var _brightness = 1;
-         var _contrast = 1;
-         var _saturation = 1;
-         var _sharpness = 1;
+       function coreUploader(context) {
+         var dispatch = dispatch$8( // Start and end events are dispatched exactly once each per legitimate outside call to `save`
+         'saveStarted', // dispatched as soon as a call to `save` has been deemed legitimate
+         'saveEnded', // dispatched after the result event has been dispatched
+         'willAttemptUpload', // dispatched before the actual upload call occurs, if it will
+         'progressChanged', // Each save results in one of these outcomes:
+         'resultNoChanges', // upload wasn't attempted since there were no edits
+         'resultErrors', // upload failed due to errors
+         'resultConflicts', // upload failed due to data conflicts
+         'resultSuccess' // upload completed without errors
+         );
+         var _isSaving = false;
+         var _conflicts = [];
+         var _errors = [];

 
 

+         var _origChanges;

 
 

-         function ensureImageryIndex() {
-           return _mainFileFetcher.get('imagery')
-             .then(function (sources) {
-               if (_imageryIndex) { return _imageryIndex; }
+         var _discardTags = {};
+         _mainFileFetcher.get('discarded').then(function (d) {
+           _discardTags = d;
+         })["catch"](function () {
+           /* ignore */
+         });
+         var uploader = utilRebind({}, dispatch, 'on');

 
 

-               _imageryIndex = {
-                 imagery: sources,
-                 features: {}
-               };
+         uploader.isSaving = function () {
+           return _isSaving;
+         };

 
 

-               // use which-polygon to support efficient index and querying for imagery
-               var features = sources.map(function (source) {
-                 if (!source.polygon) { return null; }
-                 // workaround for editor-layer-index weirdness..
-                 // Add an extra array nest to each element in `source.polygon`
-                 // so the rings are not treated as a bunch of holes:
-                 // what we have: [ [[outer],[hole],[hole]] ]
-                 // what we want: [ [[outer]],[[outer]],[[outer]] ]
-                 var rings = source.polygon.map(function (ring) { return [ring]; });
-
-                 var feature = {
-                   type: 'Feature',
-                   properties: { id: source.id },
-                   geometry: { type: 'MultiPolygon', coordinates: rings }
-                 };
+         uploader.save = function (changeset, tryAgain, checkConflicts) {
+           // Guard against accidentally entering save code twice - #4641
+           if (_isSaving && !tryAgain) {
+             return;
+           }

 
 

-                 _imageryIndex.features[source.id] = feature;
-                 return feature;
+           var osm = context.connection();
+           if (!osm) return; // If user somehow got logged out mid-save, try to reauthenticate..
+           // This can happen if they were logged in from before, but the tokens are no longer valid.

 
 

-               }).filter(Boolean);
+           if (!osm.authenticated()) {
+             osm.authenticate(function (err) {
+               if (!err) {
+                 uploader.save(changeset, tryAgain, checkConflicts); // continue where we left off..
+               }
+             });
+             return;
+           }

 
 

-               _imageryIndex.query = whichPolygon_1({ type: 'FeatureCollection', features: features });
+           if (!_isSaving) {
+             _isSaving = true;
+             dispatch.call('saveStarted', this);
+           }

 
 

+           var history = context.history();
+           _conflicts = [];
+           _errors = []; // Store original changes, in case user wants to download them as an .osc file

 
 

-               // Instantiate `rendererBackgroundSource` objects for each source
-               _imageryIndex.backgrounds = sources.map(function (source) {
-                 if (source.type === 'bing') {
-                   return rendererBackgroundSource.Bing(source, dispatch$1);
-                 } else if (/^EsriWorldImagery/.test(source.id)) {
-                   return rendererBackgroundSource.Esri(source);
-                 } else {
-                   return rendererBackgroundSource(source);
-                 }
-               });
+           _origChanges = history.changes(actionDiscardTags(history.difference(), _discardTags)); // First time, `history.perform` a no-op action.
+           // Any conflict resolutions will be done as `history.replace`
+           // Remember to pop this later if needed

 
 

-               // Add 'None'
-               _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None());
+           if (!tryAgain) {
+             history.perform(actionNoop());
+           } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`

 
 

-               // Add 'Custom'
-               var template = corePreferences('background-custom-template') || '';
-               var custom = rendererBackgroundSource.Custom(template);
-               _imageryIndex.backgrounds.unshift(custom);

 
 

-               return _imageryIndex;
-             });
-         }
+           if (!checkConflicts) {
+             upload(changeset); // Do the full (slow) conflict check..
+           } else {
+             performFullConflictCheck(changeset);
+           }
+         };

 
 

+         function performFullConflictCheck(changeset) {
+           var osm = context.connection();
+           if (!osm) return;
+           var history = context.history();
+           var localGraph = context.graph();
+           var remoteGraph = coreGraph(history.base(), true);
+           var summary = history.difference().summary();
+           var _toCheck = [];

 
 

-         function background(selection) {
-           var currSource = baseLayer.source();
+           for (var i = 0; i < summary.length; i++) {
+             var item = summary[i];

 
 

-           // If we are displaying an Esri basemap at high zoom,
-           // check its tilemap to see how high the zoom can go
-           if (context.map().zoom() > 18) {
-             if (currSource && /^EsriWorldImagery/.test(currSource.id)) {
-               var center = context.map().center();
-               currSource.fetchTilemap(center);
+             if (item.changeType === 'modified') {
+               _toCheck.push(item.entity.id);

              }
            }
 
              }
            }
 

-           // Is the imagery valid here? - #4827
-           var sources = background.sources(context.map().extent());
-           var wasValid = _isValid;
-           _isValid = !!sources.filter(function (d) { return d === currSource; }).length;
-
-           if (wasValid !== _isValid) {      // change in valid status
-             background.updateImagery();
-           }
-
+           var _toLoad = withChildNodes(_toCheck, localGraph);

 
 

-           var baseFilter = '';
-           if (detected.cssfilters) {
-             if (_brightness !== 1) {
-               baseFilter += " brightness(" + _brightness + ")";
-             }
-             if (_contrast !== 1) {
-               baseFilter += " contrast(" + _contrast + ")";
-             }
-             if (_saturation !== 1) {
-               baseFilter += " saturate(" + _saturation + ")";
-             }
-             if (_sharpness < 1) {  // gaussian blur
-               var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
-               baseFilter += " blur(" + blur + "px)";
-             }
-           }
+           var _loaded = {};
+           var _toLoadCount = 0;
+           var _toLoadTotal = _toLoad.length;

 
 

-           var base = selection.selectAll('.layer-background')
-             .data([0]);
+           if (_toCheck.length) {
+             dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);

 
 

-           base = base.enter()
-             .insert('div', '.layer-data')
-             .attr('class', 'layer layer-background')
-             .merge(base);
+             _toLoad.forEach(function (id) {
+               _loaded[id] = false;
+             });

 
 

-           if (detected.cssfilters) {
-             base.style('filter', baseFilter || null);
+             osm.loadMultiple(_toLoad, loaded);

            } else {
            } else {

-             base.style('opacity', _brightness);
+             upload(changeset);

            }
 
            }
 

+           return;

 
 

-           var imagery = base.selectAll('.layer-imagery')
-             .data([0]);
-
-           imagery.enter()
-             .append('div')
-             .attr('class', 'layer layer-imagery')
-             .merge(imagery)
-             .call(baseLayer);
-
+           function withChildNodes(ids, graph) {
+             var s = new Set(ids);
+             ids.forEach(function (id) {
+               var entity = graph.entity(id);
+               if (entity.type !== 'way') return;
+               graph.childNodes(entity).forEach(function (child) {
+                 if (child.version !== undefined) {
+                   s.add(child.id);
+                 }
+               });
+             });
+             return Array.from(s);
+           } // Reload modified entities into an alternate graph and check for conflicts..

 
 

-           var maskFilter = '';
-           var mixBlendMode = '';
-           if (detected.cssfilters && _sharpness > 1) {  // apply unsharp mask
-             mixBlendMode = 'overlay';
-             maskFilter = 'saturate(0) blur(3px) invert(1)';

 
 

-             var contrast = _sharpness - 1;
-             maskFilter += " contrast(" + contrast + ")";
+           function loaded(err, result) {
+             if (_errors.length) return;

 
 

-             var brightness = d3_interpolateNumber(1, 0.85)(_sharpness - 1);
-             maskFilter += " brightness(" + brightness + ")";
-           }
+             if (err) {
+               _errors.push({
+                 msg: err.message || err.responseText,
+                 details: [_t('save.status_code', {
+                   code: err.status
+                 })]
+               });

 
 

-           var mask = base.selectAll('.layer-unsharp-mask')
-             .data(detected.cssfilters && _sharpness > 1 ? [0] : []);
+               didResultInErrors();
+             } else {
+               var loadMore = [];
+               result.data.forEach(function (entity) {
+                 remoteGraph.replace(entity);
+                 _loaded[entity.id] = true;
+                 _toLoad = _toLoad.filter(function (val) {
+                   return val !== entity.id;
+                 });
+                 if (!entity.visible) return; // Because loadMultiple doesn't download /full like loadEntity,
+                 // need to also load children that aren't already being checked..

 
 

-           mask.exit()
-             .remove();
+                 var i, id;

 
 

-           mask.enter()
-             .append('div')
-             .attr('class', 'layer layer-mask layer-unsharp-mask')
-             .merge(mask)
-             .call(baseLayer)
-             .style('filter', maskFilter || null)
-             .style('mix-blend-mode', mixBlendMode || null);
+                 if (entity.type === 'way') {
+                   for (i = 0; i < entity.nodes.length; i++) {
+                     id = entity.nodes[i];

 
 

+                     if (_loaded[id] === undefined) {
+                       _loaded[id] = false;
+                       loadMore.push(id);
+                     }
+                   }
+                 } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+                   for (i = 0; i < entity.members.length; i++) {
+                     id = entity.members[i].id;

 
 

-           var overlays = selection.selectAll('.layer-overlay')
-             .data(_overlayLayers, function (d) { return d.source().name(); });
+                     if (_loaded[id] === undefined) {
+                       _loaded[id] = false;
+                       loadMore.push(id);
+                     }
+                   }
+                 }
+               });
+               _toLoadCount += result.data.length;
+               _toLoadTotal += loadMore.length;
+               dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);

 
 

-           overlays.exit()
-             .remove();
+               if (loadMore.length) {
+                 _toLoad.push.apply(_toLoad, loadMore);

 
 

-           overlays.enter()
-             .insert('div', '.layer-data')
-             .attr('class', 'layer layer-overlay')
-             .merge(overlays)
-             .each(function (layer, i, nodes) { return select(nodes[i]).call(layer); });
-         }
+                 osm.loadMultiple(loadMore, loaded);
+               }

 
 

+               if (!_toLoad.length) {
+                 detectConflicts();
+                 upload(changeset);
+               }
+             }
+           }

 
 

-         background.updateImagery = function() {
-           var currSource = baseLayer.source();
-           if (context.inIntro() || !currSource) { return; }
+           function detectConflicts() {
+             function choice(id, text, _action) {
+               return {
+                 id: id,
+                 text: text,
+                 action: function action() {
+                   history.replace(_action);
+                 }
+               };
+             }

 
 

-           var o = _overlayLayers
-             .filter(function (d) { return !d.source().isLocatorOverlay() && !d.source().isHidden(); })
-             .map(function (d) { return d.source().id; })
-             .join(',');
+             function formatUser(d) {
+               return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
+             }

 
 

-           var meters = geoOffsetToMeters(currSource.offset());
-           var EPSILON = 0.01;
-           var x = +meters[0].toFixed(2);
-           var y = +meters[1].toFixed(2);
-           var hash = utilStringQs(window.location.hash);
+             function entityName(entity) {
+               return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
+             }

 
 

-           var id = currSource.id;
-           if (id === 'custom') {
-             id = "custom:" + (currSource.template());
-           }
+             function sameVersions(local, remote) {
+               if (local.version !== remote.version) return false;

 
 

-           if (id) {
-             hash.background = id;
-           } else {
-             delete hash.background;
-           }
+               if (local.type === 'way') {
+                 var children = utilArrayUnion(local.nodes, remote.nodes);

 
 

-           if (o) {
-             hash.overlays = o;
-           } else {
-             delete hash.overlays;
-           }
+                 for (var i = 0; i < children.length; i++) {
+                   var a = localGraph.hasEntity(children[i]);
+                   var b = remoteGraph.hasEntity(children[i]);
+                   if (a && b && a.version !== b.version) return false;
+                 }
+               }

 
 

-           if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
-             hash.offset = x + "," + y;
-           } else {
-             delete hash.offset;
-           }
+               return true;
+             }

 
 

-           if (!window.mocha) {
-             window.location.replace('#' + utilQsString(hash, true));
+             _toCheck.forEach(function (id) {
+               var local = localGraph.entity(id);
+               var remote = remoteGraph.entity(id);
+               if (sameVersions(local, remote)) return;
+               var merge = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags, formatUser);
+               history.replace(merge);
+               var mergeConflicts = merge.conflicts();
+               if (!mergeConflicts.length) return; // merged safely
+
+               var forceLocal = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_local');
+               var forceRemote = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_remote');
+               var keepMine = _t('save.conflict.' + (remote.visible ? 'keep_local' : 'restore'));
+               var keepTheirs = _t('save.conflict.' + (remote.visible ? 'keep_remote' : 'delete'));
+
+               _conflicts.push({
+                 id: id,
+                 name: entityName(local),
+                 details: mergeConflicts,
+                 chosen: 1,
+                 choices: [choice(id, keepMine, forceLocal), choice(id, keepTheirs, forceRemote)]
+               });
+             });

            }
            }

+         }

 
 

-           var imageryUsed = [];
-           var photoOverlaysUsed = [];
+         function upload(changeset) {
+           var osm = context.connection();

 
 

-           var currUsed = currSource.imageryUsed();
-           if (currUsed && _isValid) {
-             imageryUsed.push(currUsed);
+           if (!osm) {
+             _errors.push({
+               msg: 'No OSM Service'
+             });

            }
 
            }
 

-           _overlayLayers
-             .filter(function (d) { return !d.source().isLocatorOverlay() && !d.source().isHidden(); })
-             .forEach(function (d) { return imageryUsed.push(d.source().imageryUsed()); });
+           if (_conflicts.length) {
+             didResultInConflicts(changeset);
+           } else if (_errors.length) {
+             didResultInErrors();
+           } else {
+             var history = context.history();
+             var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));

 
 

-           var dataLayer = context.layers().layer('data');
-           if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
-             imageryUsed.push(dataLayer.getSrc());
+             if (changes.modified.length || changes.created.length || changes.deleted.length) {
+               dispatch.call('willAttemptUpload', this);
+               osm.putChangeset(changeset, changes, uploadCallback);
+             } else {
+               // changes were insignificant or reverted by user
+               didResultInNoChanges();
+             }

            }
            }

+         }

 
 

-           var photoOverlayLayers = {
-             streetside: 'Bing Streetside',
-             mapillary: 'Mapillary Images',
-             'mapillary-map-features': 'Mapillary Map Features',
-             'mapillary-signs': 'Mapillary Signs',
-             openstreetcam: 'OpenStreetCam Images'
-           };
+         function uploadCallback(err, changeset) {
+           if (err) {
+             if (err.status === 409) {
+               // 409 Conflict
+               uploader.save(changeset, true, true); // tryAgain = true, checkConflicts = true
+             } else {
+               _errors.push({
+                 msg: err.message || err.responseText,
+                 details: [_t('save.status_code', {
+                   code: err.status
+                 })]
+               });

 
 

-           for (var layerID in photoOverlayLayers) {
-             var layer = context.layers().layer(layerID);
-             if (layer && layer.enabled()) {
-               photoOverlaysUsed.push(layerID);
-               imageryUsed.push(photoOverlayLayers[layerID]);
+               didResultInErrors();

              }
              }

+           } else {
+             didResultInSuccess(changeset);

            }
            }

+         }

 
 

-           context.history().imageryUsed(imageryUsed);
-           context.history().photoOverlaysUsed(photoOverlaysUsed);
-         };
+         function didResultInNoChanges() {
+           dispatch.call('resultNoChanges', this);
+           endSave();
+           context.flush(); // reset iD
+         }

 
 

+         function didResultInErrors() {
+           context.history().pop();
+           dispatch.call('resultErrors', this, _errors);
+           endSave();
+         }

 
 

-         background.sources = function (extent, zoom, includeCurrent) {
-           if (!_imageryIndex) { return []; }   // called before init()?
+         function didResultInConflicts(changeset) {
+           _conflicts.sort(function (a, b) {
+             return b.id.localeCompare(a.id);
+           });

 
 

-           var visible = {};
-           (_imageryIndex.query.bbox(extent.rectangle(), true) || [])
-             .forEach(function (d) { return visible[d.id] = true; });
+           dispatch.call('resultConflicts', this, changeset, _conflicts, _origChanges);
+           endSave();
+         }

 
 

-           var currSource = baseLayer.source();
+         function didResultInSuccess(changeset) {
+           // delete the edit stack cached to local storage
+           context.history().clearSaved();
+           dispatch.call('resultSuccess', this, changeset); // Add delay to allow for postgres replication #1646 #2678

 
 

-           return _imageryIndex.backgrounds.filter(function (source) {
-             if (!source.polygon) { return true; }                          // always include imagery with worldwide coverage
-             if (includeCurrent && currSource === source) { return true; }  // optionally include the current imagery
-             if (zoom && zoom < 6) { return false; }                        // optionally exclude local imagery at low zooms
-             return visible[source.id];                                 // include imagery visible in given extent
-           });
-         };
+           window.setTimeout(function () {
+             endSave();
+             context.flush(); // reset iD
+           }, 2500);
+         }

 
 

+         function endSave() {
+           _isSaving = false;
+           dispatch.call('saveEnded', this);
+         }

 
 

-         background.dimensions = function (val) {
-           if (!val) { return; }
-           baseLayer.dimensions(val);
-           _overlayLayers.forEach(function (layer) { return layer.dimensions(val); });
+         uploader.cancelConflictResolution = function () {
+           context.history().pop();

          };
 
          };
 

+         uploader.processResolvedConflicts = function (changeset) {
+           var history = context.history();

 
 

-         background.baseLayerSource = function(d) {
-           if (!arguments.length) { return baseLayer.source(); }
+           for (var i = 0; i < _conflicts.length; i++) {
+             if (_conflicts[i].chosen === 1) {
+               // user chose "use theirs"
+               var entity = context.hasEntity(_conflicts[i].id);

 
 

-           // test source against OSM imagery blacklists..
-           var osm = context.connection();
-           if (!osm) { return background; }
+               if (entity && entity.type === 'way') {
+                 var children = utilArrayUniq(entity.nodes);

 
 

-           var blacklists = osm.imageryBlacklists();
-           var template = d.template();
-           var fail = false;
-           var tested = 0;
-           var regex;
+                 for (var j = 0; j < children.length; j++) {
+                   history.replace(actionRevert(children[j]));
+                 }
+               }

 
 

-           for (var i = 0; i < blacklists.length; i++) {
-             try {
-               regex = new RegExp(blacklists[i]);
-               fail = regex.test(template);
-               tested++;
-               if (fail) { break; }
-             } catch (e) {
-               /* noop */
+               history.replace(actionRevert(_conflicts[i].id));

              }
            }
 
              }
            }
 

-           // ensure at least one test was run.
-           if (!tested) {
-             regex = new RegExp('.*\.google(apis)?\..*/(vt|kh)[\?/].*([xyz]=.*){3}.*');
-             fail = regex.test(template);
-           }
-
-           baseLayer.source(!fail ? d : background.findSource('none'));
-           dispatch$1.call('change');
-           background.updateImagery();
-           return background;
+           uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false

          };
 
          };
 

+         uploader.reset = function () {};

 
 

-         background.findSource = function (id) {
-           if (!id || !_imageryIndex) { return null; }   // called before init()?
-           return _imageryIndex.backgrounds.find(function (d) { return d.id && d.id === id; });
-         };
+         return uploader;
+       }

 
 

+       var $$3 = _export;
+       var fails = fails$N;
+       var expm1 = mathExpm1;

 
 

-         background.bing = function () {
-           background.baseLayerSource(background.findSource('Bing'));
+       var abs = Math.abs;
+       var exp = Math.exp;
+       var E = Math.E;
+
+       var FORCED = fails(function () {
+         // eslint-disable-next-line es/no-math-sinh -- required for testing
+         return Math.sinh(-2e-17) != -2e-17;
+       });
+
+       // `Math.sinh` method
+       // https://tc39.es/ecma262/#sec-math.sinh
+       // V8 near Chromium 38 has a problem with very small numbers
+       $$3({ target: 'Math', stat: true, forced: FORCED }, {
+         sinh: function sinh(x) {
+           return abs(x = +x) < 1 ? (expm1(x) - expm1(-x)) / 2 : (exp(x - 1) - exp(-x - 1)) * (E / 2);
+         }
+       });
+
+       var isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2; // listen for DPI change, e.g. when dragging a browser window from a retina to non-retina screen
+
+       window.matchMedia("\n        (-webkit-min-device-pixel-ratio: 2), /* Safari */\n        (min-resolution: 2dppx),             /* standard */\n        (min-resolution: 192dpi)             /* fallback */\n    ").addListener(function () {
+         isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
+       });
+
+       function localeDateString(s) {
+         if (!s) return null;
+         var options = {
+           day: 'numeric',
+           month: 'short',
+           year: 'numeric'

          };
          };

+         var d = new Date(s);
+         if (isNaN(d.getTime())) return null;
+         return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+       }

 
 

+       function vintageRange(vintage) {
+         var s;

 
 

-         background.showsLayer = function (d) {
-           var currSource = baseLayer.source();
-           if (!d || !currSource) { return false; }
-           return d.id === currSource.id || _overlayLayers.some(function (layer) { return d.id === layer.source().id; });
-         };
+         if (vintage.start || vintage.end) {
+           s = vintage.start || '?';

 
 

+           if (vintage.start !== vintage.end) {
+             s += ' - ' + (vintage.end || '?');
+           }
+         }

 
 

-         background.overlayLayerSources = function () {
-           return _overlayLayers.map(function (layer) { return layer.source(); });
-         };
+         return s;
+       }

 
 

+       function rendererBackgroundSource(data) {
+         var source = Object.assign({}, data); // shallow copy

 
 

-         background.toggleOverlayLayer = function (d) {
-           var layer;
-           for (var i = 0; i < _overlayLayers.length; i++) {
-             layer = _overlayLayers[i];
-             if (layer.source() === d) {
-               _overlayLayers.splice(i, 1);
-               dispatch$1.call('change');
-               background.updateImagery();
-               return;
-             }
-           }
+         var _offset = [0, 0];
+         var _name = source.name;
+         var _description = source.description;

 
 

-           layer = rendererTileLayer(context)
-             .source(d)
-             .projection(context.projection)
-             .dimensions(baseLayer.dimensions()
-           );
+         var _best = !!source.best;

 
 

-           _overlayLayers.push(layer);
-           dispatch$1.call('change');
-           background.updateImagery();
-         };
+         var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;

 
 

+         source.tileSize = data.tileSize || 256;
+         source.zoomExtent = data.zoomExtent || [0, 22];
+         source.overzoom = data.overzoom !== false;

 
 

-         background.nudge = function (d, zoom) {
-           var currSource = baseLayer.source();
-           if (currSource) {
-             currSource.nudge(d, zoom);
-             dispatch$1.call('change');
-             background.updateImagery();
-           }
-           return background;
+         source.offset = function (val) {
+           if (!arguments.length) return _offset;
+           _offset = val;
+           return source;

          };
 
          };
 

-
-         background.offset = function(d) {
-           var currSource = baseLayer.source();
-           if (!arguments.length) {
-             return (currSource && currSource.offset()) || [0, 0];
-           }
-           if (currSource) {
-             currSource.offset(d);
-             dispatch$1.call('change');
-             background.updateImagery();
-           }
-           return background;
+         source.nudge = function (val, zoomlevel) {
+           _offset[0] += val[0] / Math.pow(2, zoomlevel);
+           _offset[1] += val[1] / Math.pow(2, zoomlevel);
+           return source;

          };
 
          };
 

+         source.name = function () {
+           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+           return _t('imagery.' + id_safe + '.name', {
+             "default": _name
+           });
+         };

 
 

-         background.brightness = function(d) {
-           if (!arguments.length) { return _brightness; }
-           _brightness = d;
-           if (context.mode()) { dispatch$1.call('change'); }
-           return background;
+         source.label = function () {
+           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+           return _t.html('imagery.' + id_safe + '.name', {
+             "default": _name
+           });

          };
 
          };
 

+         source.description = function () {
+           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+           return _t.html('imagery.' + id_safe + '.description', {
+             "default": _description
+           });
+         };

 
 

-         background.contrast = function(d) {
-           if (!arguments.length) { return _contrast; }
-           _contrast = d;
-           if (context.mode()) { dispatch$1.call('change'); }
-           return background;
+         source.best = function () {
+           return _best;

          };
 
          };
 

+         source.area = function () {
+           if (!data.polygon) return Number.MAX_VALUE; // worldwide

 
 

-         background.saturation = function(d) {
-           if (!arguments.length) { return _saturation; }
-           _saturation = d;
-           if (context.mode()) { dispatch$1.call('change'); }
-           return background;
+           var area = d3_geoArea({
+             type: 'MultiPolygon',
+             coordinates: [data.polygon]
+           });
+           return isNaN(area) ? 0 : area;

          };
 
          };
 

-
-         background.sharpness = function(d) {
-           if (!arguments.length) { return _sharpness; }
-           _sharpness = d;
-           if (context.mode()) { dispatch$1.call('change'); }
-           return background;
+         source.imageryUsed = function () {
+           return _name || source.id;

          };
 
          };
 

-         var _loadPromise;
+         source.template = function (val) {
+           if (!arguments.length) return _template;

 
 

-         background.ensureLoaded = function () {
+           if (source.id === 'custom' || source.id === 'Bing') {
+             _template = val;
+           }

 
 

-           if (_loadPromise) { return _loadPromise; }
+           return source;
+         };

 
 

-           function parseMapParams(qmap) {
-             if (!qmap) { return false; }
-             var params = qmap.split('/').map(Number);
-             if (params.length < 3 || params.some(isNaN)) { return false; }
-             return geoExtent([params[2], params[1]]);  // lon,lat
+         source.url = function (coord) {
+           var result = _template;
+           if (result === '') return result; // source 'none'
+           // Guess a type based on the tokens present in the template
+           // (This is for 'custom' source, where we don't know)
+
+           if (!source.type) {
+             if (/SERVICE=WMS|\{(proj|wkid|bbox)\}/.test(_template)) {
+               source.type = 'wms';
+               source.projection = 'EPSG:3857'; // guess
+             } else if (/\{(x|y)\}/.test(_template)) {
+               source.type = 'tms';
+             } else if (/\{u\}/.test(_template)) {
+               source.type = 'bing';
+             }

            }
 
            }
 

-           var hash = utilStringQs(window.location.hash);
-           var requested = hash.background || hash.layer;
-           var extent = parseMapParams(hash.map);
+           if (source.type === 'wms') {
+             var tileToProjectedCoords = function tileToProjectedCoords(x, y, z) {
+               //polyfill for IE11, PhantomJS
+               var sinh = Math.sinh || function (x) {
+                 var y = Math.exp(x);
+                 return (y - 1 / y) / 2;
+               };

 
 

-           return _loadPromise = ensureImageryIndex()
-             .then(function (imageryIndex) {
-               var first = imageryIndex.backgrounds.length && imageryIndex.backgrounds[0];
+               var zoomSize = Math.pow(2, z);
+               var lon = x / zoomSize * Math.PI * 2 - Math.PI;
+               var lat = Math.atan(sinh(Math.PI * (1 - 2 * y / zoomSize)));

 
 

-               var best;
-               if (!requested && extent) {
-                 best = background.sources(extent).find(function (s) { return s.best(); });
-               }
+               switch (source.projection) {
+                 case 'EPSG:4326':
+                   return {
+                     x: lon * 180 / Math.PI,
+                     y: lat * 180 / Math.PI
+                   };

 
 

-               // Decide which background layer to display
-               if (requested && requested.indexOf('custom:') === 0) {
-                 var template = requested.replace(/^custom:/, '');
-                 var custom = background.findSource('custom');
-                 background.baseLayerSource(custom.template(template));
-                 corePreferences('background-custom-template', template);
-               } else {
-                 background.baseLayerSource(
-                   background.findSource(requested) ||
-                   best ||
-                   background.findSource(corePreferences('background-last-used')) ||
-                   background.findSource('Bing') ||
-                   first ||
-                   background.findSource('none')
-                 );
+                 default:
+                   // EPSG:3857 and synonyms
+                   var mercCoords = mercatorRaw(lon, lat);
+                   return {
+                     x: 20037508.34 / Math.PI * mercCoords[0],
+                     y: 20037508.34 / Math.PI * mercCoords[1]
+                   };

                }
                }

+             };

 
 

-               var locator = imageryIndex.backgrounds.find(function (d) { return d.overlay && d.default; });
-               if (locator) {
-                 background.toggleOverlayLayer(locator);
-               }
+             var tileSize = source.tileSize;
+             var projection = source.projection;
+             var minXmaxY = tileToProjectedCoords(coord[0], coord[1], coord[2]);
+             var maxXminY = tileToProjectedCoords(coord[0] + 1, coord[1] + 1, coord[2]);
+             result = result.replace(/\{(\w+)\}/g, function (token, key) {
+               switch (key) {
+                 case 'width':
+                 case 'height':
+                   return tileSize;
+
+                 case 'proj':
+                   return projection;
+
+                 case 'wkid':
+                   return projection.replace(/^EPSG:/, '');
+
+                 case 'bbox':
+                   // WMS 1.3 flips x/y for some coordinate systems including EPSG:4326 - #7557
+                   if (projection === 'EPSG:4326' && // The CRS parameter implies version 1.3 (prior versions use SRS)
+                   /VERSION=1.3|CRS={proj}/.test(source.template().toUpperCase())) {
+                     return maxXminY.y + ',' + minXmaxY.x + ',' + minXmaxY.y + ',' + maxXminY.x;
+                   } else {
+                     return minXmaxY.x + ',' + maxXminY.y + ',' + maxXminY.x + ',' + minXmaxY.y;
+                   }

 
 

-               var overlays = (hash.overlays || '').split(',');
-               overlays.forEach(function (overlay) {
-                 overlay = background.findSource(overlay);
-                 if (overlay) {
-                   background.toggleOverlayLayer(overlay);
-                 }
-               });
+                 case 'w':
+                   return minXmaxY.x;

 
 

-               if (hash.gpx) {
-                 var gpx = context.layers().layer('data');
-                 if (gpx) {
-                   gpx.url(hash.gpx, '.gpx');
-                 }
-               }
+                 case 's':
+                   return maxXminY.y;

 
 

-               if (hash.offset) {
-                 var offset = hash.offset
-                   .replace(/;/g, ',')
-                   .split(',')
-                   .map(function (n) { return !isNaN(n) && n; });
+                 case 'n':
+                   return maxXminY.x;

 
 

-                 if (offset.length === 2) {
-                   background.offset(geoMetersToOffset(offset));
-                 }
+                 case 'e':
+                   return minXmaxY.y;
+
+                 default:
+                   return token;

                }
                }

-             })
-             .catch(function () { /* ignore */ });
+             });
+           } else if (source.type === 'tms') {
+             result = result.replace('{x}', coord[0]).replace('{y}', coord[1]) // TMS-flipped y coordinate
+             .replace(/\{[t-]y\}/, Math.pow(2, coord[2]) - coord[1] - 1).replace(/\{z(oom)?\}/, coord[2]) // only fetch retina tiles for retina screens
+             .replace(/\{@2x\}|\{r\}/, isRetina ? '@2x' : '');
+           } else if (source.type === 'bing') {
+             result = result.replace('{u}', function () {
+               var u = '';
+
+               for (var zoom = coord[2]; zoom > 0; zoom--) {
+                 var b = 0;
+                 var mask = 1 << zoom - 1;
+                 if ((coord[0] & mask) !== 0) b++;
+                 if ((coord[1] & mask) !== 0) b += 2;
+                 u += b.toString();
+               }
+
+               return u;
+             });
+           } // these apply to any type..
+
+
+           result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
+             var subdomains = r.split(',');
+             return subdomains[(coord[0] + coord[1]) % subdomains.length];
+           });
+           return result;

          };
 
          };
 

+         source.validZoom = function (z) {
+           return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
+         };

 
 

-         return utilRebind(background, dispatch$1, 'on');
-       }
+         source.isLocatorOverlay = function () {
+           return source.id === 'mapbox_locator_overlay';
+         };
+         /* hides a source from the list, but leaves it available for use */

 
 

-       function rendererFeatures(context) {
-           var dispatch$1 = dispatch('change', 'redraw');
-           var features = utilRebind({}, dispatch$1, 'on');
-           var _deferred = new Set();
-
-           var traffic_roads = {
-               'motorway': true,
-               'motorway_link': true,
-               'trunk': true,
-               'trunk_link': true,
-               'primary': true,
-               'primary_link': true,
-               'secondary': true,
-               'secondary_link': true,
-               'tertiary': true,
-               'tertiary_link': true,
-               'residential': true,
-               'unclassified': true,
-               'living_street': true
-           };

 
 

-           var service_roads = {
-               'service': true,
-               'road': true,
-               'track': true
-           };
+         source.isHidden = function () {
+           return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
+         };

 
 

-           var paths = {
-               'path': true,
-               'footway': true,
-               'cycleway': true,
-               'bridleway': true,
-               'steps': true,
-               'pedestrian': true
-           };
+         source.copyrightNotices = function () {};

 
 

-           var past_futures = {
-               'proposed': true,
-               'construction': true,
-               'abandoned': true,
-               'dismantled': true,
-               'disused': true,
-               'razed': true,
-               'demolished': true,
-               'obliterated': true
+         source.getMetadata = function (center, tileCoord, callback) {
+           var vintage = {
+             start: localeDateString(source.startDate),
+             end: localeDateString(source.endDate)

            };
            };

+           vintage.range = vintageRange(vintage);
+           var metadata = {
+             vintage: vintage
+           };
+           callback(null, metadata);
+         };

 
 

-           var _cullFactor = 1;
-           var _cache = {};
-           var _rules = {};
-           var _stats = {};
-           var _keys = [];
-           var _hidden = [];
-           var _forceVisible = {};
+         return source;
+       }

 
 

+       rendererBackgroundSource.Bing = function (data, dispatch) {
+         // https://docs.microsoft.com/en-us/bingmaps/rest-services/imagery/get-imagery-metadata
+         // https://docs.microsoft.com/en-us/bingmaps/rest-services/directly-accessing-the-bing-maps-tiles
+         //fallback url template
+         data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&n=z';
+         var bing = rendererBackgroundSource(data); //var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // P2, JOSM, etc

 
 

-           function update() {
-               if (!window.mocha) {
-                   var hash = utilStringQs(window.location.hash);
-                   var disabled = features.disabled();
-                   if (disabled.length) {
-                       hash.disable_features = disabled.join(',');
-                   } else {
-                       delete hash.disable_features;
-                   }
-                   window.location.replace('#' + utilQsString(hash, true));
-                   corePreferences('disabled-features', disabled.join(','));
-               }
-               _hidden = features.hidden();
-               dispatch$1.call('change');
-               dispatch$1.call('redraw');
-           }
-
-
-           function defineRule(k, filter, max) {
-               var isEnabled = true;
-
-               _keys.push(k);
-               _rules[k] = {
-                   filter: filter,
-                   enabled: isEnabled,   // whether the user wants it enabled..
-                   count: 0,
-                   currentMax: (max || Infinity),
-                   defaultMax: (max || Infinity),
-                   enable: function() { this.enabled = true; this.currentMax = this.defaultMax; },
-                   disable: function() { this.enabled = false; this.currentMax = 0; },
-                   hidden: function() {
-                       return (this.count === 0 && !this.enabled) ||
-                           this.count > this.currentMax * _cullFactor;
-                   },
-                   autoHidden: function() { return this.hidden() && this.currentMax > 0; }
-               };
-           }
+         var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD

 
 

+         /*
+         missing tile image strictness param (n=)
+         •   n=f -> (Fail) returns a 404
+         •   n=z -> (Empty) returns a 200 with 0 bytes (no content)
+         •   n=t -> (Transparent) returns a 200 with a transparent (png) tile
+         */

 
 

-           defineRule('points', function isPoint(tags, geometry) {
-               return geometry === 'point';
-           }, 200);
+         var strictParam = 'n';
+         var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&uriScheme=https&key=' + key;
+         var cache = {};
+         var inflight = {};
+         var providers = [];
+         d3_json(url).then(function (json) {
+           var imageryResource = json.resourceSets[0].resources[0]; //retrieve and prepare up to date imagery template

 
 

-           defineRule('traffic_roads', function isTrafficRoad(tags) {
-               return traffic_roads[tags.highway];
-           });
+           var template = imageryResource.imageUrl; //https://ecn.{subdomain}.tiles.virtualearth.net/tiles/a{quadkey}.jpeg?g=10339

 
 

-           defineRule('service_roads', function isServiceRoad(tags) {
-               return service_roads[tags.highway];
-           });
+           var subDomains = imageryResource.imageUrlSubdomains; //["t0, t1, t2, t3"]

 
 

-           defineRule('paths', function isPath(tags) {
-               return paths[tags.highway];
-           });
+           var subDomainNumbers = subDomains.map(function (subDomain) {
+             return subDomain.substring(1);
+           }).join(',');
+           template = template.replace('{subdomain}', "t{switch:".concat(subDomainNumbers, "}")).replace('{quadkey}', '{u}');

 
 

-           defineRule('buildings', function isBuilding(tags) {
-               return (
-                   (!!tags.building && tags.building !== 'no') ||
-                   tags.parking === 'multi-storey' ||
-                   tags.parking === 'sheds' ||
-                   tags.parking === 'carports' ||
-                   tags.parking === 'garage_boxes'
-               );
-           }, 250);
-
-           defineRule('building_parts', function isBuildingPart(tags) {
-               return tags['building:part'];
-           });
-
-           defineRule('indoor', function isIndoor(tags) {
-               return tags.indoor;
-           });
-
-           defineRule('landuse', function isLanduse(tags, geometry) {
-               return geometry === 'area' &&
-                   !_rules.buildings.filter(tags) &&
-                   !_rules.building_parts.filter(tags) &&
-                   !_rules.indoor.filter(tags) &&
-                   !_rules.water.filter(tags) &&
-                   !_rules.pistes.filter(tags);
-           });
-
-           defineRule('boundaries', function isBoundary(tags) {
-               return (
-                   !!tags.boundary
-               ) && !(
-                   traffic_roads[tags.highway] ||
-                   service_roads[tags.highway] ||
-                   paths[tags.highway] ||
-                   tags.waterway ||
-                   tags.railway ||
-                   tags.landuse ||
-                   tags.natural ||
-                   tags.building ||
-                   tags.power
-               );
-           });
+           if (!new URLSearchParams(template).has(strictParam)) {
+             template += "&".concat(strictParam, "=z");
+           }

 
 

-           defineRule('water', function isWater(tags) {
-               return (
-                   !!tags.waterway ||
-                   tags.natural === 'water' ||
-                   tags.natural === 'coastline' ||
-                   tags.natural === 'bay' ||
-                   tags.landuse === 'pond' ||
-                   tags.landuse === 'basin' ||
-                   tags.landuse === 'reservoir' ||
-                   tags.landuse === 'salt_pond'
-               );
+           bing.template(template);
+           providers = imageryResource.imageryProviders.map(function (provider) {
+             return {
+               attribution: provider.attribution,
+               areas: provider.coverageAreas.map(function (area) {
+                 return {
+                   zoom: [area.zoomMin, area.zoomMax],
+                   extent: geoExtent([area.bbox[1], area.bbox[0]], [area.bbox[3], area.bbox[2]])
+                 };
+               })
+             };

            });
            });

+           dispatch.call('change');
+         })["catch"](function () {
+           /* ignore */
+         });

 
 

-           defineRule('rail', function isRail(tags) {
-               return (
-                   !!tags.railway ||
-                   tags.landuse === 'railway'
-               ) && !(
-                   traffic_roads[tags.highway] ||
-                   service_roads[tags.highway] ||
-                   paths[tags.highway]
-               );
-           });
+         bing.copyrightNotices = function (zoom, extent) {
+           zoom = Math.min(zoom, 21);
+           return providers.filter(function (provider) {
+             return provider.areas.some(function (area) {
+               return extent.intersects(area.extent) && area.zoom[0] <= zoom && area.zoom[1] >= zoom;
+             });
+           }).map(function (provider) {
+             return provider.attribution;
+           }).join(', ');
+         };

 
 

-           defineRule('pistes', function isPiste(tags) {
-               return tags['piste:type'];
-           });
+         bing.getMetadata = function (center, tileCoord, callback) {
+           var tileID = tileCoord.slice(0, 3).join('/');
+           var zoom = Math.min(tileCoord[2], 21);
+           var centerPoint = center[1] + ',' + center[0]; // lat,lng

 
 

-           defineRule('aerialways', function isPiste(tags) {
-               return tags.aerialway &&
-                   tags.aerialway !== 'yes' &&
-                   tags.aerialway !== 'station';
-           });
+           var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
+           if (inflight[tileID]) return;

 
 

-           defineRule('power', function isPower(tags) {
-               return !!tags.power;
-           });
+           if (!cache[tileID]) {
+             cache[tileID] = {};
+           }

 
 

-           // contains a past/future tag, but not in active use as a road/path/cycleway/etc..
-           defineRule('past_future', function isPastFuture(tags) {
-               if (
-                   traffic_roads[tags.highway] ||
-                   service_roads[tags.highway] ||
-                   paths[tags.highway]
-               ) { return false; }
+           if (cache[tileID] && cache[tileID].metadata) {
+             return callback(null, cache[tileID].metadata);
+           }

 
 

-               var strings = Object.keys(tags);
+           inflight[tileID] = true;
+           d3_json(url).then(function (result) {
+             delete inflight[tileID];

 
 

-               for (var i = 0; i < strings.length; i++) {
-                   var s = strings[i];
-                   if (past_futures[s] || past_futures[tags[s]]) { return true; }
-               }
-               return false;
-           });
+             if (!result) {
+               throw new Error('Unknown Error');
+             }

 
 

-           // Lines or areas that don't match another feature filter.
-           // IMPORTANT: The 'others' feature must be the last one defined,
-           //   so that code in getMatches can skip this test if `hasMatch = true`
-           defineRule('others', function isOther(tags, geometry) {
-               return (geometry === 'line' || geometry === 'area');
+             var vintage = {
+               start: localeDateString(result.resourceSets[0].resources[0].vintageStart),
+               end: localeDateString(result.resourceSets[0].resources[0].vintageEnd)
+             };
+             vintage.range = vintageRange(vintage);
+             var metadata = {
+               vintage: vintage
+             };
+             cache[tileID].metadata = metadata;
+             if (callback) callback(null, metadata);
+           })["catch"](function (err) {
+             delete inflight[tileID];
+             if (callback) callback(err.message);

            });
            });

+         };

 
 

+         bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
+         return bing;
+       };

 
 

+       rendererBackgroundSource.Esri = function (data) {
+         // in addition to using the tilemap at zoom level 20, overzoom real tiles - #4327 (deprecated technique, but it works)
+         if (data.template.match(/blankTile/) === null) {
+           data.template = data.template + '?blankTile=false';
+         }

 
 

-           features.features = function() {
-               return _rules;
-           };
+         var esri = rendererBackgroundSource(data);
+         var cache = {};
+         var inflight = {};

 
 

+         var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
+         // https://developers.arcgis.com/documentation/tiled-elevation-service/

 
 

-           features.keys = function() {
-               return _keys;
-           };

 
 

+         esri.fetchTilemap = function (center) {
+           // skip if we have already fetched a tilemap within 5km
+           if (_prevCenter && geoSphericalDistance(center, _prevCenter) < 5000) return;
+           _prevCenter = center; // tiles are available globally to zoom level 19, afterward they may or may not be present

 
 

-           features.enabled = function(k) {
-               if (!arguments.length) {
-                   return _keys.filter(function(k) { return _rules[k].enabled; });
-               }
-               return _rules[k] && _rules[k].enabled;
-           };
+           var z = 20; // first generate a random url using the template

 
 

+           var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map

 
 

-           features.disabled = function(k) {
-               if (!arguments.length) {
-                   return _keys.filter(function(k) { return !_rules[k].enabled; });
-               }
-               return _rules[k] && !_rules[k].enabled;
-           };
+           var x = Math.floor((center[0] + 180) / 360 * Math.pow(2, z));
+           var y = Math.floor((1 - Math.log(Math.tan(center[1] * Math.PI / 180) + 1 / Math.cos(center[1] * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, z)); // fetch an 8x8 grid to leverage cache

 
 

+           var tilemapUrl = dummyUrl.replace(/tile\/[0-9]+\/[0-9]+\/[0-9]+\?blankTile=false/, 'tilemap') + '/' + z + '/' + y + '/' + x + '/8/8'; // make the request and introspect the response from the tilemap server

 
 

-           features.hidden = function(k) {
-               if (!arguments.length) {
-                   return _keys.filter(function(k) { return _rules[k].hidden(); });
-               }
-               return _rules[k] && _rules[k].hidden();
-           };
+           d3_json(tilemapUrl).then(function (tilemap) {
+             if (!tilemap) {
+               throw new Error('Unknown Error');
+             }

 
 

+             var hasTiles = true;

 
 

-           features.autoHidden = function(k) {
-               if (!arguments.length) {
-                   return _keys.filter(function(k) { return _rules[k].autoHidden(); });
+             for (var i = 0; i < tilemap.data.length; i++) {
+               // 0 means an individual tile in the grid doesn't exist
+               if (!tilemap.data[i]) {
+                 hasTiles = false;
+                 break;

                }
                }

-               return _rules[k] && _rules[k].autoHidden();
-           };
+             } // if any tiles are missing at level 20 we restrict maxZoom to 19

 
 
 
 

-           features.enable = function(k) {
-               if (_rules[k] && !_rules[k].enabled) {
-                   _rules[k].enable();
-                   update();
-               }
-           };
-
-           features.enableAll = function() {
-               var didEnable = false;
-               for (var k in _rules) {
-                   if (!_rules[k].enabled) {
-                       didEnable = true;
-                       _rules[k].enable();
-                   }
-               }
-               if (didEnable) { update(); }
-           };
+             esri.zoomExtent[1] = hasTiles ? 22 : 19;
+           })["catch"](function () {
+             /* ignore */
+           });
+         };

 
 

+         esri.getMetadata = function (center, tileCoord, callback) {
+           var tileID = tileCoord.slice(0, 3).join('/');
+           var zoom = Math.min(tileCoord[2], esri.zoomExtent[1]);
+           var centerPoint = center[0] + ',' + center[1]; // long, lat (as it should be)

 
 

-           features.disable = function(k) {
-               if (_rules[k] && _rules[k].enabled) {
-                   _rules[k].disable();
-                   update();
-               }
-           };
+           var unknown = _t('info_panels.background.unknown');
+           var metadataLayer;
+           var vintage = {};
+           var metadata = {};
+           if (inflight[tileID]) return;

 
 

-           features.disableAll = function() {
-               var didDisable = false;
-               for (var k in _rules) {
-                   if (_rules[k].enabled) {
-                       didDisable = true;
-                       _rules[k].disable();
-                   }
-               }
-               if (didDisable) { update(); }
-           };
+           switch (true) {
+             case zoom >= 20 && esri.id === 'EsriWorldImageryClarity':
+               metadataLayer = 4;
+               break;

 
 

+             case zoom >= 19:
+               metadataLayer = 3;
+               break;

 
 

-           features.toggle = function(k) {
-               if (_rules[k]) {
-                   (function(f) { return f.enabled ? f.disable() : f.enable(); }(_rules[k]));
-                   update();
-               }
-           };
+             case zoom >= 17:
+               metadataLayer = 2;
+               break;

 
 

+             case zoom >= 13:
+               metadataLayer = 0;
+               break;

 
 

-           features.resetStats = function() {
-               for (var i = 0; i < _keys.length; i++) {
-                   _rules[_keys[i]].count = 0;
-               }
-               dispatch$1.call('change');
-           };
+             default:
+               metadataLayer = 99;
+           }

 
 

+           var url; // build up query using the layer appropriate to the current zoom

 
 

-           features.gatherStats = function(d, resolver, dimensions) {
-               var needsRedraw = false;
-               var types = utilArrayGroupBy(d, 'type');
-               var entities = [].concat(types.relation || [], types.way || [], types.node || []);
-               var currHidden, geometry, matches, i, j;
+           if (esri.id === 'EsriWorldImagery') {
+             url = 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/';
+           } else if (esri.id === 'EsriWorldImageryClarity') {
+             url = 'https://serviceslab.arcgisonline.com/arcgis/rest/services/Clarity_World_Imagery/MapServer/';
+           }

 
 

-               for (i = 0; i < _keys.length; i++) {
-                   _rules[_keys[i]].count = 0;
-               }
+           url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';

 
 

-               // adjust the threshold for point/building culling based on viewport size..
-               // a _cullFactor of 1 corresponds to a 1000x1000px viewport..
-               _cullFactor = dimensions[0] * dimensions[1] / 1000000;
+           if (!cache[tileID]) {
+             cache[tileID] = {};
+           }

 
 

-               for (i = 0; i < entities.length; i++) {
-                   geometry = entities[i].geometry(resolver);
-                   matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
-                   for (j = 0; j < matches.length; j++) {
-                       _rules[matches[j]].count++;
-                   }
-               }
+           if (cache[tileID] && cache[tileID].metadata) {
+             return callback(null, cache[tileID].metadata);
+           } // accurate metadata is only available >= 13

 
 

-               currHidden = features.hidden();
-               if (currHidden !== _hidden) {
-                   _hidden = currHidden;
-                   needsRedraw = true;
-                   dispatch$1.call('change');
-               }

 
 

-               return needsRedraw;
-           };
+           if (metadataLayer === 99) {
+             vintage = {
+               start: null,
+               end: null,
+               range: null
+             };
+             metadata = {
+               vintage: null,
+               source: unknown,
+               description: unknown,
+               resolution: unknown,
+               accuracy: unknown
+             };
+             callback(null, metadata);
+           } else {
+             inflight[tileID] = true;
+             d3_json(url).then(function (result) {
+               delete inflight[tileID];
+
+               if (!result) {
+                 throw new Error('Unknown Error');
+               } else if (result.features && result.features.length < 1) {
+                 throw new Error('No Results');
+               } else if (result.error && result.error.message) {
+                 throw new Error(result.error.message);
+               } // pass through the discrete capture date from metadata
+
+
+               var captureDate = localeDateString(result.features[0].attributes.SRC_DATE2);
+               vintage = {
+                 start: captureDate,
+                 end: captureDate,
+                 range: captureDate
+               };
+               metadata = {
+                 vintage: vintage,
+                 source: clean(result.features[0].attributes.NICE_NAME),
+                 description: clean(result.features[0].attributes.NICE_DESC),
+                 resolution: clean(+parseFloat(result.features[0].attributes.SRC_RES).toFixed(4)),
+                 accuracy: clean(+parseFloat(result.features[0].attributes.SRC_ACC).toFixed(4))
+               }; // append units - meters

 
 

+               if (isFinite(metadata.resolution)) {
+                 metadata.resolution += ' m';
+               }

 
 

-           features.stats = function() {
-               for (var i = 0; i < _keys.length; i++) {
-                   _stats[_keys[i]] = _rules[_keys[i]].count;
+               if (isFinite(metadata.accuracy)) {
+                 metadata.accuracy += ' m';

                }
 
                }
 

-               return _stats;
-           };
+               cache[tileID].metadata = metadata;
+               if (callback) callback(null, metadata);
+             })["catch"](function (err) {
+               delete inflight[tileID];
+               if (callback) callback(err.message);
+             });
+           }

 
 

+           function clean(val) {
+             return String(val).trim() || unknown;
+           }
+         };

 
 

-           features.clear = function(d) {
-               for (var i = 0; i < d.length; i++) {
-                   features.clearEntity(d[i]);
-               }
-           };
+         return esri;
+       };

 
 

+       rendererBackgroundSource.None = function () {
+         var source = rendererBackgroundSource({
+           id: 'none',
+           template: ''
+         });

 
 

-           features.clearEntity = function(entity) {
-               delete _cache[osmEntity.key(entity)];
-           };
+         source.name = function () {
+           return _t('background.none');
+         };

 
 

+         source.label = function () {
+           return _t.html('background.none');
+         };

 
 

-           features.reset = function() {
-               Array.from(_deferred).forEach(function(handle) {
-                   window.cancelIdleCallback(handle);
-                   _deferred.delete(handle);
-               });
+         source.imageryUsed = function () {
+           return null;
+         };

 
 

-               _cache = {};
-           };
+         source.area = function () {
+           return -1; // sources in background pane are sorted by area
+         };

 
 

-           // only certain relations are worth checking
-           function relationShouldBeChecked(relation) {
-               // multipolygon features have `area` geometry and aren't checked here
-               return relation.tags.type === 'boundary';
-           }
-
-           features.getMatches = function(entity, resolver, geometry) {
-               if (geometry === 'vertex' ||
-                   (geometry === 'relation' && !relationShouldBeChecked(entity))) { return {}; }
-
-               var ent = osmEntity.key(entity);
-               if (!_cache[ent]) {
-                   _cache[ent] = {};
-               }
-
-               if (!_cache[ent].matches) {
-                   var matches = {};
-                   var hasMatch = false;
-
-                   for (var i = 0; i < _keys.length; i++) {
-                       if (_keys[i] === 'others') {
-                           if (hasMatch) { continue; }
-
-                           // If an entity...
-                           //   1. is a way that hasn't matched other 'interesting' feature rules,
-                           if (entity.type === 'way') {
-                               var parents = features.getParents(entity, resolver, geometry);
-
-                               //   2a. belongs only to a single multipolygon relation
-                               if ((parents.length === 1 && parents[0].isMultipolygon()) ||
-                                   // 2b. or belongs only to boundary relations
-                                   (parents.length > 0 && parents.every(function(parent) { return parent.tags.type === 'boundary'; }))) {
-
-                                   // ...then match whatever feature rules the parent relation has matched.
-                                   // see #2548, #2887
-                                   //
-                                   // IMPORTANT:
-                                   // For this to work, getMatches must be called on relations before ways.
-                                   //
-                                   var pkey = osmEntity.key(parents[0]);
-                                   if (_cache[pkey] && _cache[pkey].matches) {
-                                       matches = Object.assign({}, _cache[pkey].matches);  // shallow copy
-                                       continue;
-                                   }
-                               }
-                           }
-                       }
+         return source;
+       };

 
 

-                       if (_rules[_keys[i]].filter(entity.tags, geometry)) {
-                           matches[_keys[i]] = hasMatch = true;
-                       }
-                   }
-                   _cache[ent].matches = matches;
-               }
+       rendererBackgroundSource.Custom = function (template) {
+         var source = rendererBackgroundSource({
+           id: 'custom',
+           template: template
+         });

 
 

-               return _cache[ent].matches;
-           };
+         source.name = function () {
+           return _t('background.custom');
+         };

 
 

+         source.label = function () {
+           return _t.html('background.custom');
+         };

 
 

-           features.getParents = function(entity, resolver, geometry) {
-               if (geometry === 'point') { return []; }
+         source.imageryUsed = function () {
+           // sanitize personal connection tokens - #6801
+           var cleaned = source.template(); // from query string parameters

 
 

-               var ent = osmEntity.key(entity);
-               if (!_cache[ent]) {
-                   _cache[ent] = {};
+           if (cleaned.indexOf('?') !== -1) {
+             var parts = cleaned.split('?', 2);
+             var qs = utilStringQs(parts[1]);
+             ['access_token', 'connectId', 'token'].forEach(function (param) {
+               if (qs[param]) {
+                 qs[param] = '{apikey}';

                }
                }

+             });
+             cleaned = parts[0] + '?' + utilQsString(qs, true); // true = soft encode
+           } // from wms/wmts api path parameters

 
 

-               if (!_cache[ent].parents) {
-                   var parents = [];
-                   if (geometry === 'vertex') {
-                       parents = resolver.parentWays(entity);
-                   } else {   // 'line', 'area', 'relation'
-                       parents = resolver.parentRelations(entity);
-                   }
-                   _cache[ent].parents = parents;
-               }
-               return _cache[ent].parents;
-           };

 
 

+           cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
+           return 'Custom (' + cleaned + ' )';
+         };

 
 

-           features.isHiddenPreset = function(preset, geometry) {
-               if (!_hidden.length) { return false; }
-               if (!preset.tags) { return false; }
+         source.area = function () {
+           return -2; // sources in background pane are sorted by area
+         };

 
 

-               var test = preset.setTags({}, geometry);
-               for (var key in _rules) {
-                   if (_rules[key].filter(test, geometry)) {
-                       if (_hidden.indexOf(key) !== -1) {
-                           return key;
-                       }
-                       return false;
-                   }
-               }
-               return false;
-           };
+         return source;
+       };

 
 

+       function rendererTileLayer(context) {
+         var transformProp = utilPrefixCSSProperty('Transform');
+         var tiler = utilTiler();
+         var _tileSize = 256;

 
 

-           features.isHiddenFeature = function(entity, resolver, geometry) {
-               if (!_hidden.length) { return false; }
-               if (!entity.version) { return false; }
-               if (_forceVisible[entity.id]) { return false; }
+         var _projection;

 
 

-               var matches = Object.keys(features.getMatches(entity, resolver, geometry));
-               return matches.length && matches.every(function(k) { return features.hidden(k); });
-           };
+         var _cache = {};

 
 

+         var _tileOrigin;

 
 

-           features.isHiddenChild = function(entity, resolver, geometry) {
-               if (!_hidden.length) { return false; }
-               if (!entity.version || geometry === 'point') { return false; }
-               if (_forceVisible[entity.id]) { return false; }
+         var _zoom;

 
 

-               var parents = features.getParents(entity, resolver, geometry);
-               if (!parents.length) { return false; }
+         var _source;

 
 

-               for (var i = 0; i < parents.length; i++) {
-                   if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
-                       return false;
-                   }
-               }
-               return true;
-           };
+         function tileSizeAtZoom(d, z) {
+           var EPSILON = 0.002; // close seams
+
+           return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
+         }

 
 

+         function atZoom(t, distance) {
+           var power = Math.pow(2, distance);
+           return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
+         }

 
 

-           features.hasHiddenConnections = function(entity, resolver) {
-               if (!_hidden.length) { return false; }
+         function lookUp(d) {
+           for (var up = -1; up > -d[2]; up--) {
+             var tile = atZoom(d, up);

 
 

-               var childNodes, connections;
-               if (entity.type === 'midpoint') {
-                   childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
-                   connections = [];
-               } else {
-                   childNodes = entity.nodes ? resolver.childNodes(entity) : [];
-                   connections = features.getParents(entity, resolver, entity.geometry(resolver));
-               }
+             if (_cache[_source.url(tile)] !== false) {
+               return tile;
+             }
+           }
+         }

 
 

-               // gather ways connected to child nodes..
-               connections = childNodes.reduce(function(result, e) {
-                   return resolver.isShared(e) ? utilArrayUnion(result, resolver.parentWays(e)) : result;
-               }, connections);
+         function uniqueBy(a, n) {
+           var o = [];
+           var seen = {};

 
 

-               return connections.some(function(e) {
-                   return features.isHidden(e, resolver, e.geometry(resolver));
-               });
-           };
+           for (var i = 0; i < a.length; i++) {
+             if (seen[a[i][n]] === undefined) {
+               o.push(a[i]);
+               seen[a[i][n]] = true;
+             }
+           }

 
 

+           return o;
+         }

 
 

-           features.isHidden = function(entity, resolver, geometry) {
-               if (!_hidden.length) { return false; }
-               if (!entity.version) { return false; }
+         function addSource(d) {
+           d.push(_source.url(d));
+           return d;
+         } // Update tiles based on current state of `projection`.

 
 

-               var fn = (geometry === 'vertex' ? features.isHiddenChild : features.isHiddenFeature);
-               return fn(entity, resolver, geometry);
-           };

 
 

+         function background(selection) {
+           _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+           var pixelOffset;

 
 

-           features.filter = function(d, resolver) {
-               if (!_hidden.length) { return d; }
+           if (_source) {
+             pixelOffset = [_source.offset()[0] * Math.pow(2, _zoom), _source.offset()[1] * Math.pow(2, _zoom)];
+           } else {
+             pixelOffset = [0, 0];
+           }

 
 

-               var result = [];
-               for (var i = 0; i < d.length; i++) {
-                   var entity = d[i];
-                   if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
-                       result.push(entity);
-                   }
-               }
-               return result;
-           };
+           var translate = [_projection.translate()[0] + pixelOffset[0], _projection.translate()[1] + pixelOffset[1]];
+           tiler.scale(_projection.scale() * 2 * Math.PI).translate(translate);
+           _tileOrigin = [_projection.scale() * Math.PI - translate[0], _projection.scale() * Math.PI - translate[1]];
+           render(selection);
+         } // Derive the tiles onscreen, remove those offscreen and position them.
+         // Important that this part not depend on `_projection` because it's
+         // rentered when tiles load/error (see #644).

 
 
 
 

-           features.forceVisible = function(entityIDs) {
-               if (!arguments.length) { return Object.keys(_forceVisible); }
+         function render(selection) {
+           if (!_source) return;
+           var requests = [];
+           var showDebug = context.getDebug('tile') && !_source.overlay;

 
 

-               _forceVisible = {};
-               for (var i = 0; i < entityIDs.length; i++) {
-                   _forceVisible[entityIDs[i]] = true;
-                   var entity = context.hasEntity(entityIDs[i]);
-                   if (entity && entity.type === 'relation') {
-                       // also show relation members (one level deep)
-                       for (var j in entity.members) {
-                           _forceVisible[entity.members[j].id] = true;
-                       }
-                   }
-               }
-               return features;
-           };
+           if (_source.validZoom(_zoom)) {
+             tiler.skipNullIsland(!!_source.overlay);
+             tiler().forEach(function (d) {
+               addSource(d);
+               if (d[3] === '') return;
+               if (typeof d[3] !== 'string') return; // Workaround for #2295

 
 

+               requests.push(d);

 
 

-           features.init = function() {
-               var storage = corePreferences('disabled-features');
-               if (storage) {
-                   var storageDisabled = storage.replace(/;/g, ',').split(',');
-                   storageDisabled.forEach(features.disable);
+               if (_cache[d[3]] === false && lookUp(d)) {
+                 requests.push(addSource(lookUp(d)));

                }
                }

+             });
+             requests = uniqueBy(requests, 3).filter(function (r) {
+               // don't re-request tiles which have failed in the past
+               return _cache[r[3]] !== false;
+             });
+           }

 
 

-               var hash = utilStringQs(window.location.hash);
-               if (hash.disable_features) {
-                   var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
-                   hashDisabled.forEach(features.disable);
-               }
-           };
+           function load(d3_event, d) {
+             _cache[d[3]] = true;
+             select(this).on('error', null).on('load', null).classed('tile-loaded', true);
+             render(selection);
+           }

 
 

+           function error(d3_event, d) {
+             _cache[d[3]] = false;
+             select(this).on('error', null).on('load', null).remove();
+             render(selection);
+           }

 
 

-           // warm up the feature matching cache upon merging fetched data
-           context.history().on('merge.features', function(newEntities) {
-               if (!newEntities) { return; }
-               var handle = window.requestIdleCallback(function() {
-                   var graph = context.graph();
-                   var types = utilArrayGroupBy(newEntities, 'type');
-                   // ensure that getMatches is called on relations before ways
-                   var entities = [].concat(types.relation || [], types.way || [], types.node || []);
-                   for (var i = 0; i < entities.length; i++) {
-                       var geometry = entities[i].geometry(graph);
-                       features.getMatches(entities[i], graph, geometry);
-                   }
-               });
-               _deferred.add(handle);
-           });
+           function imageTransform(d) {
+             var ts = _tileSize * Math.pow(2, _zoom - d[2]);

 
 

+             var scale = tileSizeAtZoom(d, _zoom);
+             return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
+           }

 
 

-           return features;
-       }
+           function tileCenter(d) {
+             var ts = _tileSize * Math.pow(2, _zoom - d[2]);

 
 

-       // Touch targets control which other vertices we can drag a vertex onto.
-       //
-       // - the activeID - nope
-       // - 1 away (adjacent) to the activeID - yes (vertices will be merged)
-       // - 2 away from the activeID - nope (would create a self intersecting segment)
-       // - all others on a linear way - yes
-       // - all others on a closed way - nope (would create a self intersecting polygon)
-       //
-       // returns
-       // 0 = active vertex - no touch/connect
-       // 1 = passive vertex - yes touch/connect
-       // 2 = adjacent vertex - yes but pay attention segmenting a line here
-       //
-       function svgPassiveVertex(node, graph, activeID) {
-           if (!activeID) { return 1; }
-           if (activeID === node.id) { return 0; }
+             return [d[0] * ts - _tileOrigin[0] + ts / 2, d[1] * ts - _tileOrigin[1] + ts / 2];
+           }

 
 

-           var parents = graph.parentWays(node);
+           function debugTransform(d) {
+             var coord = tileCenter(d);
+             return 'translate(' + coord[0] + 'px,' + coord[1] + 'px)';
+           } // Pick a representative tile near the center of the viewport
+           // (This is useful for sampling the imagery vintage)

 
 

-           var i, j, nodes, isClosed, ix1, ix2, ix3, ix4, max;

 
 

-           for (i = 0; i < parents.length; i++) {
-               nodes = parents[i].nodes;
-               isClosed = parents[i].isClosed();
-               for (j = 0; j < nodes.length; j++) {   // find this vertex, look nearby
-                   if (nodes[j] === node.id) {
-                       ix1 = j - 2;
-                       ix2 = j - 1;
-                       ix3 = j + 1;
-                       ix4 = j + 2;
-
-                       if (isClosed) {  // wraparound if needed
-                           max = nodes.length - 1;
-                           if (ix1 < 0)   { ix1 = max + ix1; }
-                           if (ix2 < 0)   { ix2 = max + ix2; }
-                           if (ix3 > max) { ix3 = ix3 - max; }
-                           if (ix4 > max) { ix4 = ix4 - max; }
-                       }
+           var dims = tiler.size();
+           var mapCenter = [dims[0] / 2, dims[1] / 2];
+           var minDist = Math.max(dims[0], dims[1]);
+           var nearCenter;
+           requests.forEach(function (d) {
+             var c = tileCenter(d);
+             var dist = geoVecLength(c, mapCenter);

 
 

-                       if (nodes[ix1] === activeID) { return 0; }        // no - prevent self intersect
-                       else if (nodes[ix2] === activeID) { return 2; }   // ok - adjacent
-                       else if (nodes[ix3] === activeID) { return 2; }   // ok - adjacent
-                       else if (nodes[ix4] === activeID) { return 0; }   // no - prevent self intersect
-                       else if (isClosed && nodes.indexOf(activeID) !== -1) { return 0; }  // no - prevent self intersect
-                   }
+             if (dist < minDist) {
+               minDist = dist;
+               nearCenter = d;
+             }
+           });
+           var image = selection.selectAll('img').data(requests, function (d) {
+             return d[3];
+           });
+           image.exit().style(transformProp, imageTransform).classed('tile-removing', true).classed('tile-center', false).each(function () {
+             var tile = select(this);
+             window.setTimeout(function () {
+               if (tile.classed('tile-removing')) {
+                 tile.remove();

                }
                }

+             }, 300);
+           });
+           image.enter().append('img').attr('class', 'tile').attr('draggable', 'false').style('width', _tileSize + 'px').style('height', _tileSize + 'px').attr('src', function (d) {
+             return d[3];
+           }).on('error', error).on('load', load).merge(image).style(transformProp, imageTransform).classed('tile-debug', showDebug).classed('tile-removing', false).classed('tile-center', function (d) {
+             return d === nearCenter;
+           });
+           var debug = selection.selectAll('.tile-label-debug').data(showDebug ? requests : [], function (d) {
+             return d[3];
+           });
+           debug.exit().remove();
+
+           if (showDebug) {
+             var debugEnter = debug.enter().append('div').attr('class', 'tile-label-debug');
+             debugEnter.append('div').attr('class', 'tile-label-debug-coord');
+             debugEnter.append('div').attr('class', 'tile-label-debug-vintage');
+             debug = debug.merge(debugEnter);
+             debug.style(transformProp, debugTransform);
+             debug.selectAll('.tile-label-debug-coord').html(function (d) {
+               return d[2] + ' / ' + d[0] + ' / ' + d[1];
+             });
+             debug.selectAll('.tile-label-debug-vintage').each(function (d) {
+               var span = select(this);
+               var center = context.projection.invert(tileCenter(d));
+
+               _source.getMetadata(center, d, function (err, result) {
+                 span.html(result && result.vintage && result.vintage.range || _t('info_panels.background.vintage') + ': ' + _t('info_panels.background.unknown'));
+               });
+             });

            }
            }

+         }

 
 

-           return 1;   // ok
-       }
-
-
-       function svgMarkerSegments(projection, graph, dt,
-                                         shouldReverse,
-                                         bothDirections) {
-           return function(entity) {
-               var i = 0;
-               var offset = dt;
-               var segments = [];
-               var clip = d3_geoIdentity().clipExtent(projection.clipExtent()).stream;
-               var coordinates = graph.childNodes(entity).map(function(n) { return n.loc; });
-               var a, b;
-
-               if (shouldReverse(entity)) {
-                   coordinates.reverse();
-               }
-
-               d3_geoStream({
-                   type: 'LineString',
-                   coordinates: coordinates
-               }, projection.stream(clip({
-                   lineStart: function() {},
-                   lineEnd: function() { a = null; },
-                   point: function(x, y) {
-                       b = [x, y];
-
-                       if (a) {
-                           var span = geoVecLength(a, b) - offset;
-
-                           if (span >= 0) {
-                               var heading = geoVecAngle(a, b);
-                               var dx = dt * Math.cos(heading);
-                               var dy = dt * Math.sin(heading);
-                               var p = [
-                                   a[0] + offset * Math.cos(heading),
-                                   a[1] + offset * Math.sin(heading)
-                               ];
-
-                               // gather coordinates
-                               var coord = [a, p];
-                               for (span -= dt; span >= 0; span -= dt) {
-                                   p = geoVecAdd(p, [dx, dy]);
-                                   coord.push(p);
-                               }
-                               coord.push(b);
-
-                               // generate svg paths
-                               var segment = '';
-                               var j;
-
-                               for (j = 0; j < coord.length; j++) {
-                                   segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-                               }
-                               segments.push({ id: entity.id, index: i++, d: segment });
-
-                               if (bothDirections(entity)) {
-                                   segment = '';
-                                   for (j = coord.length - 1; j >= 0; j--) {
-                                       segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-                                   }
-                                   segments.push({ id: entity.id, index: i++, d: segment });
-                               }
-                           }
+         background.projection = function (val) {
+           if (!arguments.length) return _projection;
+           _projection = val;
+           return background;
+         };

 
 

-                           offset = -span;
-                       }
+         background.dimensions = function (val) {
+           if (!arguments.length) return tiler.size();
+           tiler.size(val);
+           return background;
+         };

 
 

-                       a = b;
-                   }
-               })));
+         background.source = function (val) {
+           if (!arguments.length) return _source;
+           _source = val;
+           _tileSize = _source.tileSize;
+           _cache = {};
+           tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
+           return background;
+         };

 
 

-               return segments;
-           };
+         return background;

        }
 
        }
 

+       var _imageryIndex = null;
+       function rendererBackground(context) {
+         var dispatch = dispatch$8('change');
+         var detected = utilDetect();
+         var baseLayer = rendererTileLayer(context).projection(context.projection);
+         var _isValid = true;
+         var _overlayLayers = [];
+         var _brightness = 1;
+         var _contrast = 1;
+         var _saturation = 1;
+         var _sharpness = 1;

 
 

-       function svgPath(projection, graph, isArea) {
-
-           // Explanation of magic numbers:
-           // "padding" here allows space for strokes to extend beyond the viewport,
-           // so that the stroke isn't drawn along the edge of the viewport when
-           // the shape is clipped.
-           //
-           // When drawing lines, pad viewport by 5px.
-           // When drawing areas, pad viewport by 65px in each direction to allow
-           // for 60px area fill stroke (see ".fill-partial path.fill" css rule)
-
-           var cache = {};
-           var padding = isArea ? 65 : 5;
-           var viewport = projection.clipExtent();
-           var paddedExtent = [
-               [viewport[0][0] - padding, viewport[0][1] - padding],
-               [viewport[1][0] + padding, viewport[1][1] + padding]
-           ];
-           var clip = d3_geoIdentity().clipExtent(paddedExtent).stream;
-           var project = projection.stream;
-           var path = d3_geoPath()
-               .projection({stream: function(output) { return project(clip(output)); }});
-
-           var svgpath = function(entity) {
-               if (entity.id in cache) {
-                   return cache[entity.id];
-               } else {
-                   return cache[entity.id] = path(entity.asGeoJSON(graph));
-               }
-           };
-
-           svgpath.geojson = function(d) {
-               if (d.__featurehash__ !== undefined) {
-                   if (d.__featurehash__ in cache) {
-                       return cache[d.__featurehash__];
-                   } else {
-                       return cache[d.__featurehash__] = path(d);
-                   }
+         function ensureImageryIndex() {
+           return _mainFileFetcher.get('imagery').then(function (sources) {
+             if (_imageryIndex) return _imageryIndex;
+             _imageryIndex = {
+               imagery: sources,
+               features: {}
+             }; // use which-polygon to support efficient index and querying for imagery
+
+             var features = sources.map(function (source) {
+               if (!source.polygon) return null; // workaround for editor-layer-index weirdness..
+               // Add an extra array nest to each element in `source.polygon`
+               // so the rings are not treated as a bunch of holes:
+               // what we have: [ [[outer],[hole],[hole]] ]
+               // what we want: [ [[outer]],[[outer]],[[outer]] ]
+
+               var rings = source.polygon.map(function (ring) {
+                 return [ring];
+               });
+               var feature = {
+                 type: 'Feature',
+                 properties: {
+                   id: source.id
+                 },
+                 geometry: {
+                   type: 'MultiPolygon',
+                   coordinates: rings
+                 }
+               };
+               _imageryIndex.features[source.id] = feature;
+               return feature;
+             }).filter(Boolean);
+             _imageryIndex.query = whichPolygon_1({
+               type: 'FeatureCollection',
+               features: features
+             }); // Instantiate `rendererBackgroundSource` objects for each source
+
+             _imageryIndex.backgrounds = sources.map(function (source) {
+               if (source.type === 'bing') {
+                 return rendererBackgroundSource.Bing(source, dispatch);
+               } else if (/^EsriWorldImagery/.test(source.id)) {
+                 return rendererBackgroundSource.Esri(source);

                } else {
                } else {

-                   return path(d);
+                 return rendererBackgroundSource(source);

                }
                }

-           };
-
-           return svgpath;
-       }
-
-
-       function svgPointTransform(projection) {
-           var svgpoint = function(entity) {
-               // http://jsperf.com/short-array-join
-               var pt = projection(entity.loc);
-               return 'translate(' + pt[0] + ',' + pt[1] + ')';
-           };
+             }); // Add 'None'

 
 

-           svgpoint.geojson = function(d) {
-               return svgpoint(d.properties.entity);
-           };
+             _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'

 
 

-           return svgpoint;
-       }

 
 

+             var template = corePreferences('background-custom-template') || '';
+             var custom = rendererBackgroundSource.Custom(template);

 
 

-       function svgRelationMemberTags(graph) {
-           return function(entity) {
-               var tags = entity.tags;
-               var shouldCopyMultipolygonTags = !entity.hasInterestingTags();
-               graph.parentRelations(entity).forEach(function(relation) {
-                   var type = relation.tags.type;
-                   if ((type === 'multipolygon' && shouldCopyMultipolygonTags) || type === 'boundary') {
-                       tags = Object.assign({}, relation.tags, tags);
-                   }
-               });
-               return tags;
-           };
-       }
+             _imageryIndex.backgrounds.unshift(custom);

 
 

+             return _imageryIndex;
+           });
+         }

 
 

-       function svgSegmentWay(way, graph, activeID) {
-           // When there is no activeID, we can memoize this expensive computation
-           if (activeID === undefined) {
-               return graph.transient(way, 'waySegments', getWaySegments);
-           } else {
-               return getWaySegments();
-           }
-
-           function getWaySegments() {
-               var isActiveWay = (way.nodes.indexOf(activeID) !== -1);
-               var features = { passive: [], active: [] };
-               var start = {};
-               var end = {};
-               var node, type;
-
-               for (var i = 0; i < way.nodes.length; i++) {
-                   node = graph.entity(way.nodes[i]);
-                   type = svgPassiveVertex(node, graph, activeID);
-                   end = { node: node, type: type };
-
-                   if (start.type !== undefined) {
-                       if (start.node.id === activeID || end.node.id === activeID) ; else if (isActiveWay && (start.type === 2 || end.type === 2)) {   // one adjacent vertex
-                           pushActive(start, end, i);
-                       } else if (start.type === 0 && end.type === 0) {   // both active vertices
-                           pushActive(start, end, i);
-                       } else {
-                           pushPassive(start, end, i);
-                       }
-                   }
+         function background(selection) {
+           var currSource = baseLayer.source(); // If we are displaying an Esri basemap at high zoom,
+           // check its tilemap to see how high the zoom can go

 
 

-                   start = end;
-               }
+           if (context.map().zoom() > 18) {
+             if (currSource && /^EsriWorldImagery/.test(currSource.id)) {
+               var center = context.map().center();
+               currSource.fetchTilemap(center);
+             }
+           } // Is the imagery valid here? - #4827

 
 

-               return features;

 
 

-               function pushActive(start, end, index) {
-                   features.active.push({
-                       type: 'Feature',
-                       id: way.id + '-' + index + '-nope',
-                       properties: {
-                           nope: true,
-                           target: true,
-                           entity: way,
-                           nodes: [start.node, end.node],
-                           index: index
-                       },
-                       geometry: {
-                           type: 'LineString',
-                           coordinates: [start.node.loc, end.node.loc]
-                       }
-                   });
-               }
+           var sources = background.sources(context.map().extent());
+           var wasValid = _isValid;
+           _isValid = !!sources.filter(function (d) {
+             return d === currSource;
+           }).length;

 
 

-               function pushPassive(start, end, index) {
-                   features.passive.push({
-                       type: 'Feature',
-                       id: way.id + '-' + index,
-                       properties: {
-                           target: true,
-                           entity: way,
-                           nodes: [start.node, end.node],
-                           index: index
-                       },
-                       geometry: {
-                           type: 'LineString',
-                           coordinates: [start.node.loc, end.node.loc]
-                       }
-                   });
-               }
+           if (wasValid !== _isValid) {
+             // change in valid status
+             background.updateImagery();

            }
            }

-       }
-
-       function svgTagClasses() {
-           var primaries = [
-               'building', 'highway', 'railway', 'waterway', 'aeroway', 'aerialway',
-               'piste:type', 'boundary', 'power', 'amenity', 'natural', 'landuse',
-               'leisure', 'military', 'place', 'man_made', 'route', 'attraction',
-               'building:part', 'indoor'
-           ];
-           var statuses = [
-               // nonexistent, might be built
-               'proposed', 'planned',
-               // under maintentance or between groundbreaking and opening
-               'construction',
-               // existent but not functional
-               'disused',
-               // dilapidated to nonexistent
-               'abandoned',
-               // nonexistent, still may appear in imagery
-               'dismantled', 'razed', 'demolished', 'obliterated',
-               // existent occasionally, e.g. stormwater drainage basin
-               'intermittent'
-           ];
-           var secondaries = [
-               'oneway', 'bridge', 'tunnel', 'embankment', 'cutting', 'barrier',
-               'surface', 'tracktype', 'footway', 'crossing', 'service', 'sport',
-               'public_transport', 'location', 'parking', 'golf', 'type', 'leisure',
-               'man_made', 'indoor'
-           ];
-           var _tags = function(entity) { return entity.tags; };

 
 

+           var baseFilter = '';

 
 

-           var tagClasses = function(selection) {
-               selection.each(function tagClassesEach(entity) {
-                   var value = this.className;
-
-                   if (value.baseVal !== undefined) {
-                       value = value.baseVal;
-                   }
+           if (detected.cssfilters) {
+             if (_brightness !== 1) {
+               baseFilter += " brightness(".concat(_brightness, ")");
+             }

 
 

-                   var t = _tags(entity);
+             if (_contrast !== 1) {
+               baseFilter += " contrast(".concat(_contrast, ")");
+             }

 
 

-                   var computed = tagClasses.getClassesString(t, value);
+             if (_saturation !== 1) {
+               baseFilter += " saturate(".concat(_saturation, ")");
+             }

 
 

-                   if (computed !== value) {
-                       select(this).attr('class', computed);
-                   }
-               });
-           };
+             if (_sharpness < 1) {
+               // gaussian blur
+               var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
+               baseFilter += " blur(".concat(blur, "px)");
+             }
+           }

 
 

+           var base = selection.selectAll('.layer-background').data([0]);
+           base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);

 
 

-           tagClasses.getClassesString = function(t, value) {
-               var primary, status;
-               var i, j, k, v;
+           if (detected.cssfilters) {
+             base.style('filter', baseFilter || null);
+           } else {
+             base.style('opacity', _brightness);
+           }

 
 

-               // in some situations we want to render perimeter strokes a certain way
-               var overrideGeometry;
-               if (/\bstroke\b/.test(value)) {
-                   if (!!t.barrier && t.barrier !== 'no') {
-                       overrideGeometry = 'line';
-                   }
-               }
+           var imagery = base.selectAll('.layer-imagery').data([0]);
+           imagery.enter().append('div').attr('class', 'layer layer-imagery').merge(imagery).call(baseLayer);
+           var maskFilter = '';
+           var mixBlendMode = '';

 
 

-               // preserve base classes (nothing with `tag-`)
-               var classes = value.trim().split(/\s+/)
-                   .filter(function(klass) {
-                       return klass.length && !/^tag-/.test(klass);
-                   })
-                   .map(function(klass) {  // special overrides for some perimeter strokes
-                       return (klass === 'line' || klass === 'area') ? (overrideGeometry || klass) : klass;
-                   });
+           if (detected.cssfilters && _sharpness > 1) {
+             // apply unsharp mask
+             mixBlendMode = 'overlay';
+             maskFilter = 'saturate(0) blur(3px) invert(1)';
+             var contrast = _sharpness - 1;
+             maskFilter += " contrast(".concat(contrast, ")");
+             var brightness = d3_interpolateNumber(1, 0.85)(_sharpness - 1);
+             maskFilter += " brightness(".concat(brightness, ")");
+           }

 
 

-               // pick at most one primary classification tag..
-               for (i = 0; i < primaries.length; i++) {
-                   k = primaries[i];
-                   v = t[k];
-                   if (!v || v === 'no') { continue; }
+           var mask = base.selectAll('.layer-unsharp-mask').data(detected.cssfilters && _sharpness > 1 ? [0] : []);
+           mask.exit().remove();
+           mask.enter().append('div').attr('class', 'layer layer-mask layer-unsharp-mask').merge(mask).call(baseLayer).style('filter', maskFilter || null).style('mix-blend-mode', mixBlendMode || null);
+           var overlays = selection.selectAll('.layer-overlay').data(_overlayLayers, function (d) {
+             return d.source().name();
+           });
+           overlays.exit().remove();
+           overlays.enter().insert('div', '.layer-data').attr('class', 'layer layer-overlay').merge(overlays).each(function (layer, i, nodes) {
+             return select(nodes[i]).call(layer);
+           });
+         }

 
 

-                   if (k === 'piste:type') {  // avoid a ':' in the class name
-                       k = 'piste';
-                   } else if (k === 'building:part') {  // avoid a ':' in the class name
-                       k = 'building_part';
-                   }
+         background.updateImagery = function () {
+           var currSource = baseLayer.source();
+           if (context.inIntro() || !currSource) return;

 
 

-                   primary = k;
-                   if (statuses.indexOf(v) !== -1) {   // e.g. `railway=abandoned`
-                       status = v;
-                       classes.push('tag-' + k);
-                   } else {
-                       classes.push('tag-' + k);
-                       classes.push('tag-' + k + '-' + v);
-                   }
+           var o = _overlayLayers.filter(function (d) {
+             return !d.source().isLocatorOverlay() && !d.source().isHidden();
+           }).map(function (d) {
+             return d.source().id;
+           }).join(',');

 
 

-                   break;
-               }
+           var meters = geoOffsetToMeters(currSource.offset());
+           var EPSILON = 0.01;
+           var x = +meters[0].toFixed(2);
+           var y = +meters[1].toFixed(2);
+           var hash = utilStringQs(window.location.hash);
+           var id = currSource.id;

 
 

-               if (!primary) {
-                   for (i = 0; i < statuses.length; i++) {
-                       for (j = 0; j < primaries.length; j++) {
-                           k = statuses[i] + ':' + primaries[j];  // e.g. `demolished:building=yes`
-                           v = t[k];
-                           if (!v || v === 'no') { continue; }
+           if (id === 'custom') {
+             id = "custom:".concat(currSource.template());
+           }

 
 

-                           status = statuses[i];
-                           break;
-                       }
-                   }
-               }
+           if (id) {
+             hash.background = id;
+           } else {
+             delete hash.background;
+           }

 
 

-               // add at most one status tag, only if relates to primary tag..
-               if (!status) {
-                   for (i = 0; i < statuses.length; i++) {
-                       k = statuses[i];
-                       v = t[k];
-                       if (!v || v === 'no') { continue; }
+           if (o) {
+             hash.overlays = o;
+           } else {
+             delete hash.overlays;
+           }

 
 

-                       if (v === 'yes') {   // e.g. `railway=rail + abandoned=yes`
-                           status = k;
-                       }
-                       else if (primary && primary === v) {  // e.g. `railway=rail + abandoned=railway`
-                           status = k;
-                       } else if (!primary && primaries.indexOf(v) !== -1) {  // e.g. `abandoned=railway`
-                           status = k;
-                           primary = v;
-                           classes.push('tag-' + v);
-                       }  // else ignore e.g.  `highway=path + abandoned=railway`
-
-                       if (status) { break; }
-                   }
-               }
+           if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
+             hash.offset = "".concat(x, ",").concat(y);
+           } else {
+             delete hash.offset;
+           }

 
 

-               if (status) {
-                   classes.push('tag-status');
-                   classes.push('tag-status-' + status);
-               }
+           if (!window.mocha) {
+             window.location.replace('#' + utilQsString(hash, true));
+           }

 
 

-               // add any secondary tags
-               for (i = 0; i < secondaries.length; i++) {
-                   k = secondaries[i];
-                   v = t[k];
-                   if (!v || v === 'no' || k === primary) { continue; }
-                   classes.push('tag-' + k);
-                   classes.push('tag-' + k + '-' + v);
-               }
+           var imageryUsed = [];
+           var photoOverlaysUsed = [];
+           var currUsed = currSource.imageryUsed();

 
 

-               // For highways, look for surface tagging..
-               if ((primary === 'highway' && !osmPathHighwayTagValues[t.highway]) || primary === 'aeroway') {
-                   var surface = t.highway === 'track' ? 'unpaved' : 'paved';
-                   for (k in t) {
-                       v = t[k];
-                       if (k in osmPavedTags) {
-                           surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
-                       }
-                       if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
-                           surface = 'semipaved';
-                       }
-                   }
-                   classes.push('tag-' + surface);
-               }
+           if (currUsed && _isValid) {
+             imageryUsed.push(currUsed);
+           }

 
 

-               // If this is a wikidata-tagged item, add a class for that..
-               if (t.wikidata || t['brand:wikidata']) {
-                   classes.push('tag-wikidata');
-               }
+           _overlayLayers.filter(function (d) {
+             return !d.source().isLocatorOverlay() && !d.source().isHidden();
+           }).forEach(function (d) {
+             return imageryUsed.push(d.source().imageryUsed());
+           });

 
 

-               return classes.join(' ').trim();
-           };
+           var dataLayer = context.layers().layer('data');

 
 

+           if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
+             imageryUsed.push(dataLayer.getSrc());
+           }

 
 

-           tagClasses.tags = function(val) {
-               if (!arguments.length) { return _tags; }
-               _tags = val;
-               return tagClasses;
+           var photoOverlayLayers = {
+             streetside: 'Bing Streetside',
+             mapillary: 'Mapillary Images',
+             'mapillary-map-features': 'Mapillary Map Features',
+             'mapillary-signs': 'Mapillary Signs',
+             openstreetcam: 'OpenStreetCam Images'

            };
 
            };
 

-           return tagClasses;
-       }
-
-       // Patterns only work in Firefox when set directly on element.
-       // (This is not a bug: https://bugzilla.mozilla.org/show_bug.cgi?id=750632)
-       var patterns = {
-           // tag - pattern name
-           // -or-
-           // tag - value - pattern name
-           // -or-
-           // tag - value - rules (optional tag-values, pattern name)
-           // (matches earlier rules first, so fallback should be last entry)
-           amenity: {
-               grave_yard: 'cemetery',
-               fountain: 'water_standing'
-           },
-           landuse: {
-               cemetery: [
-                   { religion: 'christian', pattern: 'cemetery_christian' },
-                   { religion: 'buddhist', pattern: 'cemetery_buddhist' },
-                   { religion: 'muslim', pattern: 'cemetery_muslim' },
-                   { religion: 'jewish', pattern: 'cemetery_jewish' },
-                   { pattern: 'cemetery' }
-               ],
-               construction: 'construction',
-               farmland: 'farmland',
-               farmyard: 'farmyard',
-               forest: [
-                   { leaf_type: 'broadleaved', pattern: 'forest_broadleaved' },
-                   { leaf_type: 'needleleaved', pattern: 'forest_needleleaved' },
-                   { leaf_type: 'leafless', pattern: 'forest_leafless' },
-                   { pattern: 'forest' } // same as 'leaf_type:mixed'
-               ],
-               grave_yard: 'cemetery',
-               grass: [
-                   { golf: 'green', pattern: 'golf_green' },
-                   { pattern: 'grass' } ],
-               landfill: 'landfill',
-               meadow: 'meadow',
-               military: 'construction',
-               orchard: 'orchard',
-               quarry: 'quarry',
-               vineyard: 'vineyard'
-           },
-           natural: {
-               beach: 'beach',
-               grassland: 'grass',
-               sand: 'beach',
-               scrub: 'scrub',
-               water: [
-                   { water: 'pond', pattern: 'pond' },
-                   { water: 'reservoir', pattern: 'water_standing' },
-                   { pattern: 'waves' }
-               ],
-               wetland: [
-                   { wetland: 'marsh', pattern: 'wetland_marsh' },
-                   { wetland: 'swamp', pattern: 'wetland_swamp' },
-                   { wetland: 'bog', pattern: 'wetland_bog' },
-                   { wetland: 'reedbed', pattern: 'wetland_reedbed' },
-                   { pattern: 'wetland' }
-               ],
-               wood: [
-                   { leaf_type: 'broadleaved', pattern: 'forest_broadleaved' },
-                   { leaf_type: 'needleleaved', pattern: 'forest_needleleaved' },
-                   { leaf_type: 'leafless', pattern: 'forest_leafless' },
-                   { pattern: 'forest' } // same as 'leaf_type:mixed'
-               ]
-           },
-           traffic_calming: {
-               island: [
-                   { surface: 'grass', pattern: 'grass' } ],
-               chicane: [
-                   { surface: 'grass', pattern: 'grass' } ],
-               choker: [
-                   { surface: 'grass', pattern: 'grass' } ]
-           }
-       };
+           for (var layerID in photoOverlayLayers) {
+             var layer = context.layers().layer(layerID);

 
 

-       function svgTagPattern(tags) {
-           // Skip pattern filling if this is a building (buildings don't get patterns applied)
-           if (tags.building && tags.building !== 'no') {
-               return null;
+             if (layer && layer.enabled()) {
+               photoOverlaysUsed.push(layerID);
+               imageryUsed.push(photoOverlayLayers[layerID]);
+             }

            }
 
            }
 

-           for (var tag in patterns) {
-               var entityValue = tags[tag];
-               if (!entityValue) { continue; }
+           context.history().imageryUsed(imageryUsed);
+           context.history().photoOverlaysUsed(photoOverlaysUsed);
+         };

 
 

-               if (typeof patterns[tag] === 'string') { // extra short syntax (just tag) - pattern name
-                   return 'pattern-' + patterns[tag];
-               } else {
-                   var values = patterns[tag];
-                   for (var value in values) {
-                       if (entityValue !== value) { continue; }
+         var _checkedBlocklists;

 
 

-                       var rules = values[value];
-                       if (typeof rules === 'string') { // short syntax - pattern name
-                           return 'pattern-' + rules;
-                       }
+         background.sources = function (extent, zoom, includeCurrent) {
+           if (!_imageryIndex) return []; // called before init()?

 
 

-                       // long syntax - rule array
-                       for (var ruleKey in rules) {
-                           var rule = rules[ruleKey];
-
-                           var pass = true;
-                           for (var criterion in rule) {
-                               if (criterion !== 'pattern') { // reserved for pattern name
-                                   // The only rule is a required tag-value pair
-                                   var v = tags[criterion];
-                                   if (!v || v !== rule[criterion]) {
-                                       pass = false;
-                                       break;
-                                   }
-                               }
-                           }
+           var visible = {};
+           (_imageryIndex.query.bbox(extent.rectangle(), true) || []).forEach(function (d) {
+             return visible[d.id] = true;
+           });
+           var currSource = baseLayer.source();
+           var osm = context.connection();
+           var blocklists = osm && osm.imageryBlocklists();

 
 

-                           if (pass) {
-                               return 'pattern-' + rule.pattern;
-                           }
-                       }
-                   }
-               }
-           }
+           if (blocklists && blocklists !== _checkedBlocklists) {
+             _imageryIndex.backgrounds.forEach(function (source) {
+               source.isBlocked = blocklists.some(function (blocklist) {
+                 return blocklist.test(source.template());
+               });
+             });

 
 

-           return null;
-       }
+             _checkedBlocklists = blocklists;
+           }

 
 

-       function svgAreas(projection, context) {
+           return _imageryIndex.backgrounds.filter(function (source) {
+             if (includeCurrent && currSource === source) return true; // optionally always include the current imagery

 
 

+             if (source.isBlocked) return false; // even bundled sources may be blocked - #7905

 
 

-           function getPatternStyle(tags) {
-               var imageID = svgTagPattern(tags);
-               if (imageID) {
-                   return 'url("#ideditor-' + imageID + '")';
-               }
-               return '';
-           }
+             if (!source.polygon) return true; // always include imagery with worldwide coverage

 
 

+             if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms

 
 

-           function drawTargets(selection, graph, entities, filter) {
-               var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-               var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-               var getPath = svgPath(projection).geojson;
-               var activeID = context.activeID();
-               var base = context.history().base();
+             return visible[source.id]; // include imagery visible in given extent
+           });
+         };

 
 

-               // The targets and nopes will be MultiLineString sub-segments of the ways
-               var data = { targets: [], nopes: [] };
+         background.dimensions = function (val) {
+           if (!val) return;
+           baseLayer.dimensions(val);

 
 

-               entities.forEach(function(way) {
-                   var features = svgSegmentWay(way, graph, activeID);
-                   data.targets.push.apply(data.targets, features.passive);
-                   data.nopes.push.apply(data.nopes, features.active);
-               });
+           _overlayLayers.forEach(function (layer) {
+             return layer.dimensions(val);
+           });
+         };

 
 

+         background.baseLayerSource = function (d) {
+           if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..

 
 

-               // Targets allow hover and vertex snapping
-               var targetData = data.targets.filter(getPath);
-               var targets = selection.selectAll('.area.target-allowed')
-                   .filter(function(d) { return filter(d.properties.entity); })
-                   .data(targetData, function key(d) { return d.id; });
+           var osm = context.connection();
+           if (!osm) return background;
+           var blocklists = osm.imageryBlocklists();
+           var template = d.template();
+           var fail = false;
+           var tested = 0;
+           var regex;

 
 

-               // exit
-               targets.exit()
-                   .remove();
+           for (var i = 0; i < blocklists.length; i++) {
+             regex = blocklists[i];
+             fail = regex.test(template);
+             tested++;
+             if (fail) break;
+           } // ensure at least one test was run.

 
 

-               var segmentWasEdited = function(d) {
-                   var wayID = d.properties.entity.id;
-                   // if the whole line was edited, don't draw segment changes
-                   if (!base.entities[wayID] ||
-                       !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-                       return false;
-                   }
-                   return d.properties.nodes.some(function(n) {
-                       return !base.entities[n.id] ||
-                              !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
-                   });
-               };

 
 

-               // enter/update
-               targets.enter()
-                   .append('path')
-                   .merge(targets)
-                   .attr('d', getPath)
-                   .attr('class', function(d) { return 'way area target target-allowed ' + targetClass + d.id; })
-                   .classed('segment-edited', segmentWasEdited);
-
-
-               // NOPE
-               var nopeData = data.nopes.filter(getPath);
-               var nopes = selection.selectAll('.area.target-nope')
-                   .filter(function(d) { return filter(d.properties.entity); })
-                   .data(nopeData, function key(d) { return d.id; });
-
-               // exit
-               nopes.exit()
-                   .remove();
-
-               // enter/update
-               nopes.enter()
-                   .append('path')
-                   .merge(nopes)
-                   .attr('d', getPath)
-                   .attr('class', function(d) { return 'way area target target-nope ' + nopeClass + d.id; })
-                   .classed('segment-edited', segmentWasEdited);
-           }
-
-
-           function drawAreas(selection, graph, entities, filter) {
-               var path = svgPath(projection, graph, true);
-               var areas = {};
-               var multipolygon;
-               var base = context.history().base();
-
-               for (var i = 0; i < entities.length; i++) {
-                   var entity = entities[i];
-                   if (entity.geometry(graph) !== 'area') { continue; }
-
-                   multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
-                   if (multipolygon) {
-                       areas[multipolygon.id] = {
-                           entity: multipolygon.mergeTags(entity.tags),
-                           area: Math.abs(entity.area(graph))
-                       };
-                   } else if (!areas[entity.id]) {
-                       areas[entity.id] = {
-                           entity: entity,
-                           area: Math.abs(entity.area(graph))
-                       };
-                   }
-               }
+           if (!tested) {
+             regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+             fail = regex.test(template);
+           }

 
 

-               var fills = Object.values(areas).filter(function hasPath(a) { return path(a.entity); });
-               fills.sort(function areaSort(a, b) { return b.area - a.area; });
-               fills = fills.map(function(a) { return a.entity; });
+           baseLayer.source(!fail ? d : background.findSource('none'));
+           dispatch.call('change');
+           background.updateImagery();
+           return background;
+         };

 
 

-               var strokes = fills.filter(function(area) { return area.type === 'way'; });
+         background.findSource = function (id) {
+           if (!id || !_imageryIndex) return null; // called before init()?

 
 

-               var data = {
-                   clip: fills,
-                   shadow: strokes,
-                   stroke: strokes,
-                   fill: fills
-               };
+           return _imageryIndex.backgrounds.find(function (d) {
+             return d.id && d.id === id;
+           });
+         };

 
 

-               var clipPaths = context.surface().selectAll('defs').selectAll('.clipPath-osm')
-                  .filter(filter)
-                  .data(data.clip, osmEntity.key);
+         background.bing = function () {
+           background.baseLayerSource(background.findSource('Bing'));
+         };

 
 

-               clipPaths.exit()
-                  .remove();
+         background.showsLayer = function (d) {
+           var currSource = baseLayer.source();
+           if (!d || !currSource) return false;
+           return d.id === currSource.id || _overlayLayers.some(function (layer) {
+             return d.id === layer.source().id;
+           });
+         };

 
 

-               var clipPathsEnter = clipPaths.enter()
-                  .append('clipPath')
-                  .attr('class', 'clipPath-osm')
-                  .attr('id', function(entity) { return 'ideditor-' + entity.id + '-clippath'; });
+         background.overlayLayerSources = function () {
+           return _overlayLayers.map(function (layer) {
+             return layer.source();
+           });
+         };

 
 

-               clipPathsEnter
-                  .append('path');
+         background.toggleOverlayLayer = function (d) {
+           var layer;

 
 

-               clipPaths.merge(clipPathsEnter)
-                  .selectAll('path')
-                  .attr('d', path);
+           for (var i = 0; i < _overlayLayers.length; i++) {
+             layer = _overlayLayers[i];

 
 

+             if (layer.source() === d) {
+               _overlayLayers.splice(i, 1);

 
 

-               var drawLayer = selection.selectAll('.layer-osm.areas');
-               var touchLayer = selection.selectAll('.layer-touch.areas');
+               dispatch.call('change');
+               background.updateImagery();
+               return;
+             }
+           }

 
 

-               // Draw areas..
-               var areagroup = drawLayer
-                   .selectAll('g.areagroup')
-                   .data(['fill', 'shadow', 'stroke']);
+           layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());

 
 

-               areagroup = areagroup.enter()
-                   .append('g')
-                   .attr('class', function(d) { return 'areagroup area-' + d; })
-                   .merge(areagroup);
+           _overlayLayers.push(layer);

 
 

-               var paths = areagroup
-                   .selectAll('path')
-                   .filter(filter)
-                   .data(function(layer) { return data[layer]; }, osmEntity.key);
+           dispatch.call('change');
+           background.updateImagery();
+         };

 
 

-               paths.exit()
-                   .remove();
+         background.nudge = function (d, zoom) {
+           var currSource = baseLayer.source();

 
 

+           if (currSource) {
+             currSource.nudge(d, zoom);
+             dispatch.call('change');
+             background.updateImagery();
+           }

 
 

-               var fillpaths = selection.selectAll('.area-fill path.area').nodes();
-               var bisect = d3_bisector(function(node) { return -node.__data__.area(graph); }).left;
+           return background;
+         };

 
 

-               function sortedByArea(entity) {
-                   if (this._parent.__data__ === 'fill') {
-                       return fillpaths[bisect(fillpaths, -entity.area(graph))];
-                   }
-               }
+         background.offset = function (d) {
+           var currSource = baseLayer.source();

 
 

-               paths = paths.enter()
-                   .insert('path', sortedByArea)
-                   .merge(paths)
-                   .each(function(entity) {
-                       var layer = this.parentNode.__data__;
-                       this.setAttribute('class', entity.type + ' area ' + layer + ' ' + entity.id);
+           if (!arguments.length) {
+             return currSource && currSource.offset() || [0, 0];
+           }

 
 

-                       if (layer === 'fill') {
-                           this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
-                           this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
-                       }
-                   })
-                   .classed('added', function(d) {
-                       return !base.entities[d.id];
-                   })
-                   .classed('geometry-edited', function(d) {
-                       return graph.entities[d.id] &&
-                           base.entities[d.id] &&
-                           !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
-                   })
-                   .classed('retagged', function(d) {
-                       return graph.entities[d.id] &&
-                           base.entities[d.id] &&
-                           !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-                   })
-                   .call(svgTagClasses())
-                   .attr('d', path);
-
-
-               // Draw touch targets..
-               touchLayer
-                   .call(drawTargets, graph, data.stroke, filter);
-           }
-
-           return drawAreas;
-       }
-
-       //[4]           NameStartChar      ::=          ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
-       //[4a]          NameChar           ::=          NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
-       //[5]           Name       ::=          NameStartChar (NameChar)*
-       var nameStartChar = /[A-Z_a-z\xC0-\xD6\xD8-\xF6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD]/;//\u10000-\uEFFFF
-       var nameChar = new RegExp("[\\-\\.0-9"+nameStartChar.source.slice(1,-1)+"\\u00B7\\u0300-\\u036F\\u203F-\\u2040]");
-       var tagNamePattern = new RegExp('^'+nameStartChar.source+nameChar.source+'*(?:\:'+nameStartChar.source+nameChar.source+'*)?$');
-       //var tagNamePattern = /^[a-zA-Z_][\w\-\.]*(?:\:[a-zA-Z_][\w\-\.]*)?$/
-       //var handlers = 'resolveEntity,getExternalSubset,characters,endDocument,endElement,endPrefixMapping,ignorableWhitespace,processingInstruction,setDocumentLocator,skippedEntity,startDocument,startElement,startPrefixMapping,notationDecl,unparsedEntityDecl,error,fatalError,warning,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,comment,endCDATA,endDTD,endEntity,startCDATA,startDTD,startEntity'.split(',')
-
-       //S_TAG,        S_ATTR, S_EQ,   S_ATTR_NOQUOT_VALUE
-       //S_ATTR_SPACE, S_ATTR_END,     S_TAG_SPACE, S_TAG_CLOSE
-       var S_TAG = 0;//tag name offerring
-       var S_ATTR = 1;//attr name offerring 
-       var S_ATTR_SPACE=2;//attr name end and space offer
-       var S_EQ = 3;//=space?
-       var S_ATTR_NOQUOT_VALUE = 4;//attr value(no quot value only)
-       var S_ATTR_END = 5;//attr value end and no space(quot end)
-       var S_TAG_SPACE = 6;//(attr value end || tag end ) && (space offer)
-       var S_TAG_CLOSE = 7;//closed el<el />
-
-       function XMLReader(){
-               
-       }
-
-       XMLReader.prototype = {
-               parse:function(source,defaultNSMap,entityMap){
-                       var domBuilder = this.domBuilder;
-                       domBuilder.startDocument();
-                       _copy(defaultNSMap ,defaultNSMap = {});
-                       parse(source,defaultNSMap,entityMap,
-                                       domBuilder,this.errorHandler);
-                       domBuilder.endDocument();
-               }
-       };
-       function parse(source,defaultNSMapCopy,entityMap,domBuilder,errorHandler){
-               function fixedFromCharCode(code) {
-                       // String.prototype.fromCharCode does not supports
-                       // > 2 bytes unicode chars directly
-                       if (code > 0xffff) {
-                               code -= 0x10000;
-                               var surrogate1 = 0xd800 + (code >> 10)
-                                       , surrogate2 = 0xdc00 + (code & 0x3ff);
-
-                               return String.fromCharCode(surrogate1, surrogate2);
-                       } else {
-                               return String.fromCharCode(code);
-                       }
-               }
-               function entityReplacer(a){
-                       var k = a.slice(1,-1);
-                       if(k in entityMap){
-                               return entityMap[k]; 
-                       }else if(k.charAt(0) === '#'){
-                               return fixedFromCharCode(parseInt(k.substr(1).replace('x','0x')))
-                       }else {
-                               errorHandler.error('entity not found:'+a);
-                               return a;
-                       }
-               }
-               function appendText(end){//has some bugs
-                       if(end>start){
-                               var xt = source.substring(start,end).replace(/&#?\w+;/g,entityReplacer);
-                               locator&&position(start);
-                               domBuilder.characters(xt,0,end-start);
-                               start = end;
-                       }
-               }
-               function position(p,m){
-                       while(p>=lineEnd && (m = linePattern.exec(source))){
-                               lineStart = m.index;
-                               lineEnd = lineStart + m[0].length;
-                               locator.lineNumber++;
-                               //console.log('line++:',locator,startPos,endPos)
-                       }
-                       locator.columnNumber = p-lineStart+1;
-               }
-               var lineStart = 0;
-               var lineEnd = 0;
-               var linePattern = /.*(?:\r\n?|\n)|.*$/g;
-               var locator = domBuilder.locator;
-               
-               var parseStack = [{currentNSMap:defaultNSMapCopy}];
-               var closeMap = {};
-               var start = 0;
-               while(true){
-                       try{
-                               var tagStart = source.indexOf('<',start);
-                               if(tagStart<0){
-                                       if(!source.substr(start).match(/^\s*$/)){
-                                               var doc = domBuilder.doc;
-                                       var text = doc.createTextNode(source.substr(start));
-                                       doc.appendChild(text);
-                                       domBuilder.currentElement = text;
-                                       }
-                                       return;
-                               }
-                               if(tagStart>start){
-                                       appendText(tagStart);
-                               }
-                               switch(source.charAt(tagStart+1)){
-                               case '/':
-                                       var end = source.indexOf('>',tagStart+3);
-                                       var tagName = source.substring(tagStart+2,end);
-                                       var config = parseStack.pop();
-                                       if(end<0){
-                                               
-                                       tagName = source.substring(tagStart+2).replace(/[\s<].*/,'');
-                                       //console.error('#@@@@@@'+tagName)
-                                       errorHandler.error("end tag name: "+tagName+' is not complete:'+config.tagName);
-                                       end = tagStart+1+tagName.length;
-                               }else if(tagName.match(/\s</)){
-                                       tagName = tagName.replace(/[\s<].*/,'');
-                                       errorHandler.error("end tag name: "+tagName+' maybe not complete');
-                                       end = tagStart+1+tagName.length;
-                                       }
-                                       //console.error(parseStack.length,parseStack)
-                                       //console.error(config);
-                                       var localNSMap = config.localNSMap;
-                                       var endMatch = config.tagName == tagName;
-                                       var endIgnoreCaseMach = endMatch || config.tagName&&config.tagName.toLowerCase() == tagName.toLowerCase();
-                               if(endIgnoreCaseMach){
-                                       domBuilder.endElement(config.uri,config.localName,tagName);
-                                               if(localNSMap){
-                                                       for(var prefix in localNSMap){
-                                                               domBuilder.endPrefixMapping(prefix) ;
-                                                       }
-                                               }
-                                               if(!endMatch){
-                                       errorHandler.fatalError("end tag name: "+tagName+' is not match the current start tagName:'+config.tagName );
-                                               }
-                               }else {
-                                       parseStack.push(config);
-                               }
-                                       
-                                       end++;
-                                       break;
-                                       // end elment
-                               case '?':// <?...?>
-                                       locator&&position(tagStart);
-                                       end = parseInstruction(source,tagStart,domBuilder);
-                                       break;
-                               case '!':// <!doctype,<![CDATA,<!--
-                                       locator&&position(tagStart);
-                                       end = parseDCC(source,tagStart,domBuilder,errorHandler);
-                                       break;
-                               default:
-                                       locator&&position(tagStart);
-                                       var el = new ElementAttributes();
-                                       var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
-                                       //elStartEnd
-                                       var end = parseElementStartPart(source,tagStart,el,currentNSMap,entityReplacer,errorHandler);
-                                       var len = el.length;
-                                       
-                                       
-                                       if(!el.closed && fixSelfClosed(source,end,el.tagName,closeMap)){
-                                               el.closed = true;
-                                               if(!entityMap.nbsp){
-                                                       errorHandler.warning('unclosed xml attribute');
-                                               }
-                                       }
-                                       if(locator && len){
-                                               var locator2 = copyLocator(locator,{});
-                                               //try{//attribute position fixed
-                                               for(var i = 0;i<len;i++){
-                                                       var a = el[i];
-                                                       position(a.offset);
-                                                       a.locator = copyLocator(locator,{});
-                                               }
-                                               //}catch(e){console.error('@@@@@'+e)}
-                                               domBuilder.locator = locator2;
-                                               if(appendElement(el,domBuilder,currentNSMap)){
-                                                       parseStack.push(el);
-                                               }
-                                               domBuilder.locator = locator;
-                                       }else {
-                                               if(appendElement(el,domBuilder,currentNSMap)){
-                                                       parseStack.push(el);
-                                               }
-                                       }
-                                       
-                                       
-                                       
-                                       if(el.uri === 'http://www.w3.org/1999/xhtml' && !el.closed){
-                                               end = parseHtmlSpecialContent(source,end,el.tagName,entityReplacer,domBuilder);
-                                       }else {
-                                               end++;
-                                       }
-                               }
-                       }catch(e){
-                               errorHandler.error('element parse error: '+e);
-                               //errorHandler.error('element parse error: '+e);
-                               end = -1;
-                               //throw e;
-                       }
-                       if(end>start){
-                               start = end;
-                       }else {
-                               //TODO: 这里有可能sax回退，有位置错误风险
-                               appendText(Math.max(tagStart,start)+1);
-                       }
-               }
-       }
-       function copyLocator(f,t){
-               t.lineNumber = f.lineNumber;
-               t.columnNumber = f.columnNumber;
-               return t;
-       }
+           if (currSource) {
+             currSource.offset(d);
+             dispatch.call('change');
+             background.updateImagery();
+           }

 
 

-       /**
-        * @see #appendElement(source,elStartEnd,el,selfClosed,entityReplacer,domBuilder,parseStack);
-        * @return end of the elementStartPart(end of elementEndPart for selfClosed el)
-        */
-       function parseElementStartPart(source,start,el,currentNSMap,entityReplacer,errorHandler){
-               var attrName;
-               var value;
-               var p = ++start;
-               var s = S_TAG;//status
-               while(true){
-                       var c = source.charAt(p);
-                       switch(c){
-                       case '=':
-                               if(s === S_ATTR){//attrName
-                                       attrName = source.slice(start,p);
-                                       s = S_EQ;
-                               }else if(s === S_ATTR_SPACE){
-                                       s = S_EQ;
-                               }else {
-                                       //fatalError: equal must after attrName or space after attrName
-                                       throw new Error('attribute equal must after attrName');
-                               }
-                               break;
-                       case '\'':
-                       case '"':
-                               if(s === S_EQ || s === S_ATTR //|| s == S_ATTR_SPACE
-                                       ){//equal
-                                       if(s === S_ATTR){
-                                               errorHandler.warning('attribute value must after "="');
-                                               attrName = source.slice(start,p);
-                                       }
-                                       start = p+1;
-                                       p = source.indexOf(c,start);
-                                       if(p>0){
-                                               value = source.slice(start,p).replace(/&#?\w+;/g,entityReplacer);
-                                               el.add(attrName,value,start-1);
-                                               s = S_ATTR_END;
-                                       }else {
-                                               //fatalError: no end quot match
-                                               throw new Error('attribute value no end \''+c+'\' match');
-                                       }
-                               }else if(s == S_ATTR_NOQUOT_VALUE){
-                                       value = source.slice(start,p).replace(/&#?\w+;/g,entityReplacer);
-                                       //console.log(attrName,value,start,p)
-                                       el.add(attrName,value,start);
-                                       //console.dir(el)
-                                       errorHandler.warning('attribute "'+attrName+'" missed start quot('+c+')!!');
-                                       start = p+1;
-                                       s = S_ATTR_END;
-                               }else {
-                                       //fatalError: no equal before
-                                       throw new Error('attribute value must after "="');
-                               }
-                               break;
-                       case '/':
-                               switch(s){
-                               case S_TAG:
-                                       el.setTagName(source.slice(start,p));
-                               case S_ATTR_END:
-                               case S_TAG_SPACE:
-                               case S_TAG_CLOSE:
-                                       s =S_TAG_CLOSE;
-                                       el.closed = true;
-                               case S_ATTR_NOQUOT_VALUE:
-                               case S_ATTR:
-                               case S_ATTR_SPACE:
-                                       break;
-                               //case S_EQ:
-                               default:
-                                       throw new Error("attribute invalid close char('/')")
-                               }
-                               break;
-                       case ''://end document
-                               //throw new Error('unexpected end of input')
-                               errorHandler.error('unexpected end of input');
-                               if(s == S_TAG){
-                                       el.setTagName(source.slice(start,p));
-                               }
-                               return p;
-                       case '>':
-                               switch(s){
-                               case S_TAG:
-                                       el.setTagName(source.slice(start,p));
-                               case S_ATTR_END:
-                               case S_TAG_SPACE:
-                               case S_TAG_CLOSE:
-                                       break;//normal
-                               case S_ATTR_NOQUOT_VALUE://Compatible state
-                               case S_ATTR:
-                                       value = source.slice(start,p);
-                                       if(value.slice(-1) === '/'){
-                                               el.closed  = true;
-                                               value = value.slice(0,-1);
-                                       }
-                               case S_ATTR_SPACE:
-                                       if(s === S_ATTR_SPACE){
-                                               value = attrName;
-                                       }
-                                       if(s == S_ATTR_NOQUOT_VALUE){
-                                               errorHandler.warning('attribute "'+value+'" missed quot(")!!');
-                                               el.add(attrName,value.replace(/&#?\w+;/g,entityReplacer),start);
-                                       }else {
-                                               if(currentNSMap[''] !== 'http://www.w3.org/1999/xhtml' || !value.match(/^(?:disabled|checked|selected)$/i)){
-                                                       errorHandler.warning('attribute "'+value+'" missed value!! "'+value+'" instead!!');
-                                               }
-                                               el.add(value,value,start);
-                                       }
-                                       break;
-                               case S_EQ:
-                                       throw new Error('attribute value missed!!');
-                               }
-       //                      console.log(tagName,tagNamePattern,tagNamePattern.test(tagName))
-                               return p;
-                       /*xml space '\x20' | #x9 | #xD | #xA; */
-                       case '\u0080':
-                               c = ' ';
-                       default:
-                               if(c<= ' '){//space
-                                       switch(s){
-                                       case S_TAG:
-                                               el.setTagName(source.slice(start,p));//tagName
-                                               s = S_TAG_SPACE;
-                                               break;
-                                       case S_ATTR:
-                                               attrName = source.slice(start,p);
-                                               s = S_ATTR_SPACE;
-                                               break;
-                                       case S_ATTR_NOQUOT_VALUE:
-                                               var value = source.slice(start,p).replace(/&#?\w+;/g,entityReplacer);
-                                               errorHandler.warning('attribute "'+value+'" missed quot(")!!');
-                                               el.add(attrName,value,start);
-                                       case S_ATTR_END:
-                                               s = S_TAG_SPACE;
-                                               break;
-                                       //case S_TAG_SPACE:
-                                       //case S_EQ:
-                                       //case S_ATTR_SPACE:
-                                       //      void();break;
-                                       //case S_TAG_CLOSE:
-                                               //ignore warning
-                                       }
-                               }else {//not space
-       //S_TAG,        S_ATTR, S_EQ,   S_ATTR_NOQUOT_VALUE
-       //S_ATTR_SPACE, S_ATTR_END,     S_TAG_SPACE, S_TAG_CLOSE
-                                       switch(s){
-                                       //case S_TAG:void();break;
-                                       //case S_ATTR:void();break;
-                                       //case S_ATTR_NOQUOT_VALUE:void();break;
-                                       case S_ATTR_SPACE:
-                                               var tagName =  el.tagName;
-                                               if(currentNSMap[''] !== 'http://www.w3.org/1999/xhtml' || !attrName.match(/^(?:disabled|checked|selected)$/i)){
-                                                       errorHandler.warning('attribute "'+attrName+'" missed value!! "'+attrName+'" instead2!!');
-                                               }
-                                               el.add(attrName,attrName,start);
-                                               start = p;
-                                               s = S_ATTR;
-                                               break;
-                                       case S_ATTR_END:
-                                               errorHandler.warning('attribute space is required"'+attrName+'"!!');
-                                       case S_TAG_SPACE:
-                                               s = S_ATTR;
-                                               start = p;
-                                               break;
-                                       case S_EQ:
-                                               s = S_ATTR_NOQUOT_VALUE;
-                                               start = p;
-                                               break;
-                                       case S_TAG_CLOSE:
-                                               throw new Error("elements closed character '/' and '>' must be connected to");
-                                       }
-                               }
-                       }//end outer switch
-                       //console.log('p++',p)
-                       p++;
-               }
-       }
-       /**
-        * @return true if has new namespace define
-        */
-       function appendElement(el,domBuilder,currentNSMap){
-               var tagName = el.tagName;
-               var localNSMap = null;
-               //var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
-               var i = el.length;
-               while(i--){
-                       var a = el[i];
-                       var qName = a.qName;
-                       var value = a.value;
-                       var nsp = qName.indexOf(':');
-                       if(nsp>0){
-                               var prefix = a.prefix = qName.slice(0,nsp);
-                               var localName = qName.slice(nsp+1);
-                               var nsPrefix = prefix === 'xmlns' && localName;
-                       }else {
-                               localName = qName;
-                               prefix = null;
-                               nsPrefix = qName === 'xmlns' && '';
-                       }
-                       //can not set prefix,because prefix !== ''
-                       a.localName = localName ;
-                       //prefix == null for no ns prefix attribute 
-                       if(nsPrefix !== false){//hack!!
-                               if(localNSMap == null){
-                                       localNSMap = {};
-                                       //console.log(currentNSMap,0)
-                                       _copy(currentNSMap,currentNSMap={});
-                                       //console.log(currentNSMap,1)
-                               }
-                               currentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;
-                               a.uri = 'http://www.w3.org/2000/xmlns/';
-                               domBuilder.startPrefixMapping(nsPrefix, value); 
-                       }
-               }
-               var i = el.length;
-               while(i--){
-                       a = el[i];
-                       var prefix = a.prefix;
-                       if(prefix){//no prefix attribute has no namespace
-                               if(prefix === 'xml'){
-                                       a.uri = 'http://www.w3.org/XML/1998/namespace';
-                               }if(prefix !== 'xmlns'){
-                                       a.uri = currentNSMap[prefix || ''];
-                                       
-                                       //{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}
-                               }
-                       }
-               }
-               var nsp = tagName.indexOf(':');
-               if(nsp>0){
-                       prefix = el.prefix = tagName.slice(0,nsp);
-                       localName = el.localName = tagName.slice(nsp+1);
-               }else {
-                       prefix = null;//important!!
-                       localName = el.localName = tagName;
-               }
-               //no prefix element has default namespace
-               var ns = el.uri = currentNSMap[prefix || ''];
-               domBuilder.startElement(ns,localName,tagName,el);
-               //endPrefixMapping and startPrefixMapping have not any help for dom builder
-               //localNSMap = null
-               if(el.closed){
-                       domBuilder.endElement(ns,localName,tagName);
-                       if(localNSMap){
-                               for(prefix in localNSMap){
-                                       domBuilder.endPrefixMapping(prefix); 
-                               }
-                       }
-               }else {
-                       el.currentNSMap = currentNSMap;
-                       el.localNSMap = localNSMap;
-                       //parseStack.push(el);
-                       return true;
-               }
-       }
-       function parseHtmlSpecialContent(source,elStartEnd,tagName,entityReplacer,domBuilder){
-               if(/^(?:script|textarea)$/i.test(tagName)){
-                       var elEndStart =  source.indexOf('</'+tagName+'>',elStartEnd);
-                       var text = source.substring(elStartEnd+1,elEndStart);
-                       if(/[&<]/.test(text)){
-                               if(/^script$/i.test(tagName)){
-                                       //if(!/\]\]>/.test(text)){
-                                               //lexHandler.startCDATA();
-                                               domBuilder.characters(text,0,text.length);
-                                               //lexHandler.endCDATA();
-                                               return elEndStart;
-                                       //}
-                               }//}else{//text area
-                                       text = text.replace(/&#?\w+;/g,entityReplacer);
-                                       domBuilder.characters(text,0,text.length);
-                                       return elEndStart;
-                               //}
-                               
-                       }
-               }
-               return elStartEnd+1;
-       }
-       function fixSelfClosed(source,elStartEnd,tagName,closeMap){
-               //if(tagName in closeMap){
-               var pos = closeMap[tagName];
-               if(pos == null){
-                       //console.log(tagName)
-                       pos =  source.lastIndexOf('</'+tagName+'>');
-                       if(pos<elStartEnd){//忘记闭合
-                               pos = source.lastIndexOf('</'+tagName);
-                       }
-                       closeMap[tagName] =pos;
-               }
-               return pos<elStartEnd;
-               //} 
-       }
-       function _copy(source,target){
-               for(var n in source){target[n] = source[n];}
-       }
-       function parseDCC(source,start,domBuilder,errorHandler){//sure start with '<!'
-               var next= source.charAt(start+2);
-               switch(next){
-               case '-':
-                       if(source.charAt(start + 3) === '-'){
-                               var end = source.indexOf('-->',start+4);
-                               //append comment source.substring(4,end)//<!--
-                               if(end>start){
-                                       domBuilder.comment(source,start+4,end-start-4);
-                                       return end+3;
-                               }else {
-                                       errorHandler.error("Unclosed comment");
-                                       return -1;
-                               }
-                       }else {
-                               //error
-                               return -1;
-                       }
-               default:
-                       if(source.substr(start+3,6) == 'CDATA['){
-                               var end = source.indexOf(']]>',start+9);
-                               domBuilder.startCDATA();
-                               domBuilder.characters(source,start+9,end-start-9);
-                               domBuilder.endCDATA(); 
-                               return end+3;
-                       }
-                       //<!DOCTYPE
-                       //startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId) 
-                       var matchs = split(source,start);
-                       var len = matchs.length;
-                       if(len>1 && /!doctype/i.test(matchs[0][0])){
-                               var name = matchs[1][0];
-                               var pubid = len>3 && /^public$/i.test(matchs[2][0]) && matchs[3][0];
-                               var sysid = len>4 && matchs[4][0];
-                               var lastMatch = matchs[len-1];
-                               domBuilder.startDTD(name,pubid && pubid.replace(/^(['"])(.*?)\1$/,'$2'),
-                                               sysid && sysid.replace(/^(['"])(.*?)\1$/,'$2'));
-                               domBuilder.endDTD();
-                               
-                               return lastMatch.index+lastMatch[0].length
-                       }
-               }
-               return -1;
-       }
-
-
-
-       function parseInstruction(source,start,domBuilder){
-               var end = source.indexOf('?>',start);
-               if(end){
-                       var match = source.substring(start,end).match(/^<\?(\S*)\s*([\s\S]*?)\s*$/);
-                       if(match){
-                               var len = match[0].length;
-                               domBuilder.processingInstruction(match[1], match[2]) ;
-                               return end+2;
-                       }else {//error
-                               return -1;
-                       }
-               }
-               return -1;
-       }
+           return background;
+         };

 
 

-       /**
-        * @param source
-        */
-       function ElementAttributes(source){
-               
-       }
-       ElementAttributes.prototype = {
-               setTagName:function(tagName){
-                       if(!tagNamePattern.test(tagName)){
-                               throw new Error('invalid tagName:'+tagName)
-                       }
-                       this.tagName = tagName;
-               },
-               add:function(qName,value,offset){
-                       if(!tagNamePattern.test(qName)){
-                               throw new Error('invalid attribute:'+qName)
-                       }
-                       this[this.length++] = {qName:qName,value:value,offset:offset};
-               },
-               length:0,
-               getLocalName:function(i){return this[i].localName},
-               getLocator:function(i){return this[i].locator},
-               getQName:function(i){return this[i].qName},
-               getURI:function(i){return this[i].uri},
-               getValue:function(i){return this[i].value}
-       //      ,getIndex:function(uri, localName)){
-       //              if(localName){
-       //                      
-       //              }else{
-       //                      var qName = uri
-       //              }
-       //      },
-       //      getValue:function(){return this.getValue(this.getIndex.apply(this,arguments))},
-       //      getType:function(uri,localName){}
-       //      getType:function(i){},
-       };
+         background.brightness = function (d) {
+           if (!arguments.length) return _brightness;
+           _brightness = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };

 
 

+         background.contrast = function (d) {
+           if (!arguments.length) return _contrast;
+           _contrast = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };

 
 

+         background.saturation = function (d) {
+           if (!arguments.length) return _saturation;
+           _saturation = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };

 
 

+         background.sharpness = function (d) {
+           if (!arguments.length) return _sharpness;
+           _sharpness = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };

 
 

-       function _set_proto_(thiz,parent){
-               thiz.__proto__ = parent;
-               return thiz;
-       }
-       if(!(_set_proto_({},_set_proto_.prototype) instanceof _set_proto_)){
-               _set_proto_ = function(thiz,parent){
-                       function p(){}          p.prototype = parent;
-                       p = new p();
-                       for(parent in thiz){
-                               p[parent] = thiz[parent];
-                       }
-                       return p;
-               };
-       }
+         var _loadPromise;

 
 

-       function split(source,start){
-               var match;
-               var buf = [];
-               var reg = /'[^']+'|"[^"]+"|[^\s<>\/=]+=?|(\/?\s*>|<)/g;
-               reg.lastIndex = start;
-               reg.exec(source);//skip <
-               while(match = reg.exec(source)){
-                       buf.push(match);
-                       if(match[1]){ return buf; }
-               }
-       }
+         background.ensureLoaded = function () {
+           if (_loadPromise) return _loadPromise;

 
 

-       var XMLReader_1 = XMLReader;
+           function parseMapParams(qmap) {
+             if (!qmap) return false;
+             var params = qmap.split('/').map(Number);
+             if (params.length < 3 || params.some(isNaN)) return false;
+             return geoExtent([params[2], params[1]]); // lon,lat
+           }

 
 

-       var sax = {
-               XMLReader: XMLReader_1
-       };
+           var hash = utilStringQs(window.location.hash);
+           var requested = hash.background || hash.layer;
+           var extent = parseMapParams(hash.map);
+           return _loadPromise = ensureImageryIndex().then(function (imageryIndex) {
+             var first = imageryIndex.backgrounds.length && imageryIndex.backgrounds[0];
+             var best;

 
 

-       /*
-        * DOM Level 2
-        * Object DOMException
-        * @see http://www.w3.org/TR/REC-DOM-Level-1/ecma-script-language-binding.html
-        * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/ecma-script-binding.html
-        */
+             if (!requested && extent) {
+               best = background.sources(extent).find(function (s) {
+                 return s.best();
+               });
+             } // Decide which background layer to display

 
 

-       function copy$2(src,dest){
-               for(var p in src){
-                       dest[p] = src[p];
-               }
-       }
-       /**
-       ^\w+\.prototype\.([_\w]+)\s*=\s*((?:.*\{\s*?[\r\n][\s\S]*?^})|\S.*?(?=[;\r\n]));?
-       ^\w+\.prototype\.([_\w]+)\s*=\s*(\S.*?(?=[;\r\n]));?
-        */
-       function _extends(Class,Super){
-               var pt = Class.prototype;
-               if(Object.create){
-                       var ppt = Object.create(Super.prototype);
-                       pt.__proto__ = ppt;
-               }
-               if(!(pt instanceof Super)){
-                       function t(){}          t.prototype = Super.prototype;
-                       t = new t();
-                       copy$2(pt,t);
-                       Class.prototype = pt = t;
-               }
-               if(pt.constructor != Class){
-                       if(typeof Class != 'function'){
-                               console.error("unknow Class:"+Class);
-                       }
-                       pt.constructor = Class;
-               }
-       }
-       var htmlns = 'http://www.w3.org/1999/xhtml' ;
-       // Node Types
-       var NodeType = {};
-       var ELEMENT_NODE                = NodeType.ELEMENT_NODE                = 1;
-       var ATTRIBUTE_NODE              = NodeType.ATTRIBUTE_NODE              = 2;
-       var TEXT_NODE                   = NodeType.TEXT_NODE                   = 3;
-       var CDATA_SECTION_NODE          = NodeType.CDATA_SECTION_NODE          = 4;
-       var ENTITY_REFERENCE_NODE       = NodeType.ENTITY_REFERENCE_NODE       = 5;
-       var ENTITY_NODE                 = NodeType.ENTITY_NODE                 = 6;
-       var PROCESSING_INSTRUCTION_NODE = NodeType.PROCESSING_INSTRUCTION_NODE = 7;
-       var COMMENT_NODE                = NodeType.COMMENT_NODE                = 8;
-       var DOCUMENT_NODE               = NodeType.DOCUMENT_NODE               = 9;
-       var DOCUMENT_TYPE_NODE          = NodeType.DOCUMENT_TYPE_NODE          = 10;
-       var DOCUMENT_FRAGMENT_NODE      = NodeType.DOCUMENT_FRAGMENT_NODE      = 11;
-       var NOTATION_NODE               = NodeType.NOTATION_NODE               = 12;
-
-       // ExceptionCode
-       var ExceptionCode = {};
-       var ExceptionMessage = {};
-       var INDEX_SIZE_ERR              = ExceptionCode.INDEX_SIZE_ERR              = ((ExceptionMessage[1]="Index size error"),1);
-       var DOMSTRING_SIZE_ERR          = ExceptionCode.DOMSTRING_SIZE_ERR          = ((ExceptionMessage[2]="DOMString size error"),2);
-       var HIERARCHY_REQUEST_ERR       = ExceptionCode.HIERARCHY_REQUEST_ERR       = ((ExceptionMessage[3]="Hierarchy request error"),3);
-       var WRONG_DOCUMENT_ERR          = ExceptionCode.WRONG_DOCUMENT_ERR          = ((ExceptionMessage[4]="Wrong document"),4);
-       var INVALID_CHARACTER_ERR       = ExceptionCode.INVALID_CHARACTER_ERR       = ((ExceptionMessage[5]="Invalid character"),5);
-       var NO_DATA_ALLOWED_ERR         = ExceptionCode.NO_DATA_ALLOWED_ERR         = ((ExceptionMessage[6]="No data allowed"),6);
-       var NO_MODIFICATION_ALLOWED_ERR = ExceptionCode.NO_MODIFICATION_ALLOWED_ERR = ((ExceptionMessage[7]="No modification allowed"),7);
-       var NOT_FOUND_ERR               = ExceptionCode.NOT_FOUND_ERR               = ((ExceptionMessage[8]="Not found"),8);
-       var NOT_SUPPORTED_ERR           = ExceptionCode.NOT_SUPPORTED_ERR           = ((ExceptionMessage[9]="Not supported"),9);
-       var INUSE_ATTRIBUTE_ERR         = ExceptionCode.INUSE_ATTRIBUTE_ERR         = ((ExceptionMessage[10]="Attribute in use"),10);
-       //level2
-       var INVALID_STATE_ERR           = ExceptionCode.INVALID_STATE_ERR               = ((ExceptionMessage[11]="Invalid state"),11);
-       var SYNTAX_ERR                  = ExceptionCode.SYNTAX_ERR                      = ((ExceptionMessage[12]="Syntax error"),12);
-       var INVALID_MODIFICATION_ERR    = ExceptionCode.INVALID_MODIFICATION_ERR        = ((ExceptionMessage[13]="Invalid modification"),13);
-       var NAMESPACE_ERR               = ExceptionCode.NAMESPACE_ERR                   = ((ExceptionMessage[14]="Invalid namespace"),14);
-       var INVALID_ACCESS_ERR          = ExceptionCode.INVALID_ACCESS_ERR              = ((ExceptionMessage[15]="Invalid access"),15);
-
-
-       function DOMException$2(code, message) {
-               if(message instanceof Error){
-                       var error = message;
-               }else {
-                       error = this;
-                       Error.call(this, ExceptionMessage[code]);
-                       this.message = ExceptionMessage[code];
-                       if(Error.captureStackTrace) { Error.captureStackTrace(this, DOMException$2); }
-               }
-               error.code = code;
-               if(message) { this.message = this.message + ": " + message; }
-               return error;
-       }DOMException$2.prototype = Error.prototype;
-       copy$2(ExceptionCode,DOMException$2);
-       /**
-        * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-536297177
-        * The NodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented. NodeList objects in the DOM are live.
-        * The items in the NodeList are accessible via an integral index, starting from 0.
-        */
-       function NodeList() {
-       }NodeList.prototype = {
-               /**
-                * The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive.
-                * @standard level1
-                */
-               length:0, 
-               /**
-                * Returns the indexth item in the collection. If index is greater than or equal to the number of nodes in the list, this returns null.
-                * @standard level1
-                * @param index  unsigned long 
-                *   Index into the collection.
-                * @return Node
-                *      The node at the indexth position in the NodeList, or null if that is not a valid index. 
-                */
-               item: function(index) {
-                       return this[index] || null;
-               },
-               toString:function(isHTML,nodeFilter){
-                       for(var buf = [], i = 0;i<this.length;i++){
-                               serializeToString(this[i],buf,isHTML,nodeFilter);
-                       }
-                       return buf.join('');
-               }
-       };
-       function LiveNodeList(node,refresh){
-               this._node = node;
-               this._refresh = refresh;
-               _updateLiveList(this);
-       }
-       function _updateLiveList(list){
-               var inc = list._node._inc || list._node.ownerDocument._inc;
-               if(list._inc != inc){
-                       var ls = list._refresh(list._node);
-                       //console.log(ls.length)
-                       __set__(list,'length',ls.length);
-                       copy$2(ls,list);
-                       list._inc = inc;
-               }
-       }
-       LiveNodeList.prototype.item = function(i){
-               _updateLiveList(this);
-               return this[i];
-       };

 
 

-       _extends(LiveNodeList,NodeList);
-       /**
-        * 
-        * Objects implementing the NamedNodeMap interface are used to represent collections of nodes that can be accessed by name. Note that NamedNodeMap does not inherit from NodeList; NamedNodeMaps are not maintained in any particular order. Objects contained in an object implementing NamedNodeMap may also be accessed by an ordinal index, but this is simply to allow convenient enumeration of the contents of a NamedNodeMap, and does not imply that the DOM specifies an order to these Nodes.
-        * NamedNodeMap objects in the DOM are live.
-        * used for attributes or DocumentType entities 
-        */
-       function NamedNodeMap() {
-       }
-       function _findNodeIndex(list,node){
-               var i = list.length;
-               while(i--){
-                       if(list[i] === node){return i}
-               }
-       }
-
-       function _addNamedNode(el,list,newAttr,oldAttr){
-               if(oldAttr){
-                       list[_findNodeIndex(list,oldAttr)] = newAttr;
-               }else {
-                       list[list.length++] = newAttr;
-               }
-               if(el){
-                       newAttr.ownerElement = el;
-                       var doc = el.ownerDocument;
-                       if(doc){
-                               oldAttr && _onRemoveAttribute(doc,el,oldAttr);
-                               _onAddAttribute(doc,el,newAttr);
-                       }
-               }
-       }
-       function _removeNamedNode(el,list,attr){
-               //console.log('remove attr:'+attr)
-               var i = _findNodeIndex(list,attr);
-               if(i>=0){
-                       var lastIndex = list.length-1;
-                       while(i<lastIndex){
-                               list[i] = list[++i];
-                       }
-                       list.length = lastIndex;
-                       if(el){
-                               var doc = el.ownerDocument;
-                               if(doc){
-                                       _onRemoveAttribute(doc,el,attr);
-                                       attr.ownerElement = null;
-                               }
-                       }
-               }else {
-                       throw DOMException$2(NOT_FOUND_ERR,new Error(el.tagName+'@'+attr))
-               }
-       }
-       NamedNodeMap.prototype = {
-               length:0,
-               item:NodeList.prototype.item,
-               getNamedItem: function(key) {
-       //              if(key.indexOf(':')>0 || key == 'xmlns'){
-       //                      return null;
-       //              }
-                       //console.log()
-                       var i = this.length;
-                       while(i--){
-                               var attr = this[i];
-                               //console.log(attr.nodeName,key)
-                               if(attr.nodeName == key){
-                                       return attr;
-                               }
-                       }
-               },
-               setNamedItem: function(attr) {
-                       var el = attr.ownerElement;
-                       if(el && el!=this._ownerElement){
-                               throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
-                       }
-                       var oldAttr = this.getNamedItem(attr.nodeName);
-                       _addNamedNode(this._ownerElement,this,attr,oldAttr);
-                       return oldAttr;
-               },
-               /* returns Node */
-               setNamedItemNS: function(attr) {// raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR
-                       var el = attr.ownerElement, oldAttr;
-                       if(el && el!=this._ownerElement){
-                               throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
-                       }
-                       oldAttr = this.getNamedItemNS(attr.namespaceURI,attr.localName);
-                       _addNamedNode(this._ownerElement,this,attr,oldAttr);
-                       return oldAttr;
-               },
-
-               /* returns Node */
-               removeNamedItem: function(key) {
-                       var attr = this.getNamedItem(key);
-                       _removeNamedNode(this._ownerElement,this,attr);
-                       return attr;
-                       
-                       
-               },// raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR
-               
-               //for level2
-               removeNamedItemNS:function(namespaceURI,localName){
-                       var attr = this.getNamedItemNS(namespaceURI,localName);
-                       _removeNamedNode(this._ownerElement,this,attr);
-                       return attr;
-               },
-               getNamedItemNS: function(namespaceURI, localName) {
-                       var i = this.length;
-                       while(i--){
-                               var node = this[i];
-                               if(node.localName == localName && node.namespaceURI == namespaceURI){
-                                       return node;
-                               }
-                       }
-                       return null;
-               }
-       };
-       /**
-        * @see http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490
-        */
-       function DOMImplementation(/* Object */ features) {
-               this._features = {};
-               if (features) {
-                       for (var feature in features) {
-                                this._features = features[feature];
-                       }
-               }
-       }
-       DOMImplementation.prototype = {
-               hasFeature: function(/* string */ feature, /* string */ version) {
-                       var versions = this._features[feature.toLowerCase()];
-                       if (versions && (!version || version in versions)) {
-                               return true;
-                       } else {
-                               return false;
-                       }
-               },
-               // Introduced in DOM Level 2:
-               createDocument:function(namespaceURI,  qualifiedName, doctype){// raises:INVALID_CHARACTER_ERR,NAMESPACE_ERR,WRONG_DOCUMENT_ERR
-                       var doc = new Document();
-                       doc.implementation = this;
-                       doc.childNodes = new NodeList();
-                       doc.doctype = doctype;
-                       if(doctype){
-                               doc.appendChild(doctype);
-                       }
-                       if(qualifiedName){
-                               var root = doc.createElementNS(namespaceURI,qualifiedName);
-                               doc.appendChild(root);
-                       }
-                       return doc;
-               },
-               // Introduced in DOM Level 2:
-               createDocumentType:function(qualifiedName, publicId, systemId){// raises:INVALID_CHARACTER_ERR,NAMESPACE_ERR
-                       var node = new DocumentType();
-                       node.name = qualifiedName;
-                       node.nodeName = qualifiedName;
-                       node.publicId = publicId;
-                       node.systemId = systemId;
-                       // Introduced in DOM Level 2:
-                       //readonly attribute DOMString        internalSubset;
-                       
-                       //TODO:..
-                       //  readonly attribute NamedNodeMap     entities;
-                       //  readonly attribute NamedNodeMap     notations;
-                       return node;
-               }
-       };
+             if (requested && requested.indexOf('custom:') === 0) {
+               var template = requested.replace(/^custom:/, '');
+               var custom = background.findSource('custom');
+               background.baseLayerSource(custom.template(template));
+               corePreferences('background-custom-template', template);
+             } else {
+               background.baseLayerSource(background.findSource(requested) || best || background.findSource(corePreferences('background-last-used')) || background.findSource('Bing') || first || background.findSource('none'));
+             }

 
 

+             var locator = imageryIndex.backgrounds.find(function (d) {
+               return d.overlay && d["default"];
+             });

 
 

-       /**
-        * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247
-        */
+             if (locator) {
+               background.toggleOverlayLayer(locator);
+             }

 
 

-       function Node() {
-       }
-       Node.prototype = {
-               firstChild : null,
-               lastChild : null,
-               previousSibling : null,
-               nextSibling : null,
-               attributes : null,
-               parentNode : null,
-               childNodes : null,
-               ownerDocument : null,
-               nodeValue : null,
-               namespaceURI : null,
-               prefix : null,
-               localName : null,
-               // Modified in DOM Level 2:
-               insertBefore:function(newChild, refChild){//raises 
-                       return _insertBefore(this,newChild,refChild);
-               },
-               replaceChild:function(newChild, oldChild){//raises 
-                       this.insertBefore(newChild,oldChild);
-                       if(oldChild){
-                               this.removeChild(oldChild);
-                       }
-               },
-               removeChild:function(oldChild){
-                       return _removeChild(this,oldChild);
-               },
-               appendChild:function(newChild){
-                       return this.insertBefore(newChild,null);
-               },
-               hasChildNodes:function(){
-                       return this.firstChild != null;
-               },
-               cloneNode:function(deep){
-                       return cloneNode(this.ownerDocument||this,this,deep);
-               },
-               // Modified in DOM Level 2:
-               normalize:function(){
-                       var child = this.firstChild;
-                       while(child){
-                               var next = child.nextSibling;
-                               if(next && next.nodeType == TEXT_NODE && child.nodeType == TEXT_NODE){
-                                       this.removeChild(next);
-                                       child.appendData(next.data);
-                               }else {
-                                       child.normalize();
-                                       child = next;
-                               }
-                       }
-               },
-               // Introduced in DOM Level 2:
-               isSupported:function(feature, version){
-                       return this.ownerDocument.implementation.hasFeature(feature,version);
-               },
-           // Introduced in DOM Level 2:
-           hasAttributes:function(){
-               return this.attributes.length>0;
-           },
-           lookupPrefix:function(namespaceURI){
-               var el = this;
-               while(el){
-                       var map = el._nsMap;
-                       //console.dir(map)
-                       if(map){
-                               for(var n in map){
-                                       if(map[n] == namespaceURI){
-                                               return n;
-                                       }
-                               }
-                       }
-                       el = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;
-               }
-               return null;
-           },
-           // Introduced in DOM Level 3:
-           lookupNamespaceURI:function(prefix){
-               var el = this;
-               while(el){
-                       var map = el._nsMap;
-                       //console.dir(map)
-                       if(map){
-                               if(prefix in map){
-                                       return map[prefix] ;
-                               }
-                       }
-                       el = el.nodeType == ATTRIBUTE_NODE?el.ownerDocument : el.parentNode;
-               }
-               return null;
-           },
-           // Introduced in DOM Level 3:
-           isDefaultNamespace:function(namespaceURI){
-               var prefix = this.lookupPrefix(namespaceURI);
-               return prefix == null;
-           }
-       };
+             var overlays = (hash.overlays || '').split(',');
+             overlays.forEach(function (overlay) {
+               overlay = background.findSource(overlay);

 
 

+               if (overlay) {
+                 background.toggleOverlayLayer(overlay);
+               }
+             });

 
 

-       function _xmlEncoder(c){
-               return c == '<' && '&lt;' ||
-                c == '>' && '&gt;' ||
-                c == '&' && '&amp;' ||
-                c == '"' && '&quot;' ||
-                '&#'+c.charCodeAt()+';'
-       }
+             if (hash.gpx) {
+               var gpx = context.layers().layer('data');

 
 

+               if (gpx) {
+                 gpx.url(hash.gpx, '.gpx');
+               }
+             }

 
 

-       copy$2(NodeType,Node);
-       copy$2(NodeType,Node.prototype);
+             if (hash.offset) {
+               var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
+                 return !isNaN(n) && n;
+               });

 
 

-       /**
-        * @param callback return true for continue,false for break
-        * @return boolean true: break visit;
-        */
-       function _visitNode(node,callback){
-               if(callback(node)){
-                       return true;
-               }
-               if(node = node.firstChild){
-                       do{
-                               if(_visitNode(node,callback)){return true}
-               }while(node=node.nextSibling)
-           }
-       }
-
-
-
-       function Document(){
-       }
-       function _onAddAttribute(doc,el,newAttr){
-               doc && doc._inc++;
-               var ns = newAttr.namespaceURI ;
-               if(ns == 'http://www.w3.org/2000/xmlns/'){
-                       //update namespace
-                       el._nsMap[newAttr.prefix?newAttr.localName:''] = newAttr.value;
-               }
-       }
-       function _onRemoveAttribute(doc,el,newAttr,remove){
-               doc && doc._inc++;
-               var ns = newAttr.namespaceURI ;
-               if(ns == 'http://www.w3.org/2000/xmlns/'){
-                       //update namespace
-                       delete el._nsMap[newAttr.prefix?newAttr.localName:''];
-               }
-       }
-       function _onUpdateChild(doc,el,newChild){
-               if(doc && doc._inc){
-                       doc._inc++;
-                       //update childNodes
-                       var cs = el.childNodes;
-                       if(newChild){
-                               cs[cs.length++] = newChild;
-                       }else {
-                               //console.log(1)
-                               var child = el.firstChild;
-                               var i = 0;
-                               while(child){
-                                       cs[i++] = child;
-                                       child =child.nextSibling;
-                               }
-                               cs.length = i;
-                       }
-               }
-       }
+               if (offset.length === 2) {
+                 background.offset(geoMetersToOffset(offset));
+               }
+             }
+           })["catch"](function () {
+             /* ignore */
+           });
+         };

 
 

-       /**
-        * attributes;
-        * children;
-        * 
-        * writeable properties:
-        * nodeValue,Attr:value,CharacterData:data
-        * prefix
-        */
-       function _removeChild(parentNode,child){
-               var previous = child.previousSibling;
-               var next = child.nextSibling;
-               if(previous){
-                       previous.nextSibling = next;
-               }else {
-                       parentNode.firstChild = next;
-               }
-               if(next){
-                       next.previousSibling = previous;
-               }else {
-                       parentNode.lastChild = previous;
-               }
-               _onUpdateChild(parentNode.ownerDocument,parentNode);
-               return child;
+         return utilRebind(background, dispatch, 'on');

        }
        }

-       /**
-        * preformance key(refChild == null)
-        */
-       function _insertBefore(parentNode,newChild,nextChild){
-               var cp = newChild.parentNode;
-               if(cp){
-                       cp.removeChild(newChild);//remove and update
-               }
-               if(newChild.nodeType === DOCUMENT_FRAGMENT_NODE){
-                       var newFirst = newChild.firstChild;
-                       if (newFirst == null) {
-                               return newChild;
-                       }
-                       var newLast = newChild.lastChild;
-               }else {
-                       newFirst = newLast = newChild;
-               }
-               var pre = nextChild ? nextChild.previousSibling : parentNode.lastChild;
-
-               newFirst.previousSibling = pre;
-               newLast.nextSibling = nextChild;
-               
-               
-               if(pre){
-                       pre.nextSibling = newFirst;
-               }else {
-                       parentNode.firstChild = newFirst;
-               }
-               if(nextChild == null){
-                       parentNode.lastChild = newLast;
-               }else {
-                       nextChild.previousSibling = newLast;
-               }
-               do{
-                       newFirst.parentNode = parentNode;
-               }while(newFirst !== newLast && (newFirst= newFirst.nextSibling))
-               _onUpdateChild(parentNode.ownerDocument||parentNode,parentNode);
-               //console.log(parentNode.lastChild.nextSibling == null)
-               if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
-                       newChild.firstChild = newChild.lastChild = null;
-               }
-               return newChild;
-       }
-       function _appendSingleChild(parentNode,newChild){
-               var cp = newChild.parentNode;
-               if(cp){
-                       var pre = parentNode.lastChild;
-                       cp.removeChild(newChild);//remove and update
-                       var pre = parentNode.lastChild;
-               }
-               var pre = parentNode.lastChild;
-               newChild.parentNode = parentNode;
-               newChild.previousSibling = pre;
-               newChild.nextSibling = null;
-               if(pre){
-                       pre.nextSibling = newChild;
-               }else {
-                       parentNode.firstChild = newChild;
-               }
-               parentNode.lastChild = newChild;
-               _onUpdateChild(parentNode.ownerDocument,parentNode,newChild);
-               return newChild;
-               //console.log("__aa",parentNode.lastChild.nextSibling == null)
-       }
-       Document.prototype = {
-               //implementation : null,
-               nodeName :  '#document',
-               nodeType :  DOCUMENT_NODE,
-               doctype :  null,
-               documentElement :  null,
-               _inc : 1,
-               
-               insertBefore :  function(newChild, refChild){//raises 
-                       if(newChild.nodeType == DOCUMENT_FRAGMENT_NODE){
-                               var child = newChild.firstChild;
-                               while(child){
-                                       var next = child.nextSibling;
-                                       this.insertBefore(child,refChild);
-                                       child = next;
-                               }
-                               return newChild;
-                       }
-                       if(this.documentElement == null && newChild.nodeType == ELEMENT_NODE){
-                               this.documentElement = newChild;
-                       }
-                       
-                       return _insertBefore(this,newChild,refChild),(newChild.ownerDocument = this),newChild;
-               },
-               removeChild :  function(oldChild){
-                       if(this.documentElement == oldChild){
-                               this.documentElement = null;
-                       }
-                       return _removeChild(this,oldChild);
-               },
-               // Introduced in DOM Level 2:
-               importNode : function(importedNode,deep){
-                       return importNode(this,importedNode,deep);
-               },
-               // Introduced in DOM Level 2:
-               getElementById :        function(id){
-                       var rtv = null;
-                       _visitNode(this.documentElement,function(node){
-                               if(node.nodeType == ELEMENT_NODE){
-                                       if(node.getAttribute('id') == id){
-                                               rtv = node;
-                                               return true;
-                                       }
-                               }
-                       });
-                       return rtv;
-               },
-               
-               //document factory method:
-               createElement : function(tagName){
-                       var node = new Element();
-                       node.ownerDocument = this;
-                       node.nodeName = tagName;
-                       node.tagName = tagName;
-                       node.childNodes = new NodeList();
-                       var attrs       = node.attributes = new NamedNodeMap();
-                       attrs._ownerElement = node;
-                       return node;
-               },
-               createDocumentFragment :        function(){
-                       var node = new DocumentFragment();
-                       node.ownerDocument = this;
-                       node.childNodes = new NodeList();
-                       return node;
-               },
-               createTextNode :        function(data){
-                       var node = new Text();
-                       node.ownerDocument = this;
-                       node.appendData(data);
-                       return node;
-               },
-               createComment : function(data){
-                       var node = new Comment();
-                       node.ownerDocument = this;
-                       node.appendData(data);
-                       return node;
-               },
-               createCDATASection :    function(data){
-                       var node = new CDATASection();
-                       node.ownerDocument = this;
-                       node.appendData(data);
-                       return node;
-               },
-               createProcessingInstruction :   function(target,data){
-                       var node = new ProcessingInstruction();
-                       node.ownerDocument = this;
-                       node.tagName = node.target = target;
-                       node.nodeValue= node.data = data;
-                       return node;
-               },
-               createAttribute :       function(name){
-                       var node = new Attr();
-                       node.ownerDocument      = this;
-                       node.name = name;
-                       node.nodeName   = name;
-                       node.localName = name;
-                       node.specified = true;
-                       return node;
-               },
-               createEntityReference : function(name){
-                       var node = new EntityReference();
-                       node.ownerDocument      = this;
-                       node.nodeName   = name;
-                       return node;
-               },
-               // Introduced in DOM Level 2:
-               createElementNS :       function(namespaceURI,qualifiedName){
-                       var node = new Element();
-                       var pl = qualifiedName.split(':');
-                       var attrs       = node.attributes = new NamedNodeMap();
-                       node.childNodes = new NodeList();
-                       node.ownerDocument = this;
-                       node.nodeName = qualifiedName;
-                       node.tagName = qualifiedName;
-                       node.namespaceURI = namespaceURI;
-                       if(pl.length == 2){
-                               node.prefix = pl[0];
-                               node.localName = pl[1];
-                       }else {
-                               //el.prefix = null;
-                               node.localName = qualifiedName;
-                       }
-                       attrs._ownerElement = node;
-                       return node;
-               },
-               // Introduced in DOM Level 2:
-               createAttributeNS :     function(namespaceURI,qualifiedName){
-                       var node = new Attr();
-                       var pl = qualifiedName.split(':');
-                       node.ownerDocument = this;
-                       node.nodeName = qualifiedName;
-                       node.name = qualifiedName;
-                       node.namespaceURI = namespaceURI;
-                       node.specified = true;
-                       if(pl.length == 2){
-                               node.prefix = pl[0];
-                               node.localName = pl[1];
-                       }else {
-                               //el.prefix = null;
-                               node.localName = qualifiedName;
-                       }
-                       return node;
-               }
-       };
-       _extends(Document,Node);
-
-
-       function Element() {
-               this._nsMap = {};
-       }Element.prototype = {
-               nodeType : ELEMENT_NODE,
-               hasAttribute : function(name){
-                       return this.getAttributeNode(name)!=null;
-               },
-               getAttribute : function(name){
-                       var attr = this.getAttributeNode(name);
-                       return attr && attr.value || '';
-               },
-               getAttributeNode : function(name){
-                       return this.attributes.getNamedItem(name);
-               },
-               setAttribute : function(name, value){
-                       var attr = this.ownerDocument.createAttribute(name);
-                       attr.value = attr.nodeValue = "" + value;
-                       this.setAttributeNode(attr);
-               },
-               removeAttribute : function(name){
-                       var attr = this.getAttributeNode(name);
-                       attr && this.removeAttributeNode(attr);
-               },
-               
-               //four real opeartion method
-               appendChild:function(newChild){
-                       if(newChild.nodeType === DOCUMENT_FRAGMENT_NODE){
-                               return this.insertBefore(newChild,null);
-                       }else {
-                               return _appendSingleChild(this,newChild);
-                       }
-               },
-               setAttributeNode : function(newAttr){
-                       return this.attributes.setNamedItem(newAttr);
-               },
-               setAttributeNodeNS : function(newAttr){
-                       return this.attributes.setNamedItemNS(newAttr);
-               },
-               removeAttributeNode : function(oldAttr){
-                       //console.log(this == oldAttr.ownerElement)
-                       return this.attributes.removeNamedItem(oldAttr.nodeName);
-               },
-               //get real attribute name,and remove it by removeAttributeNode
-               removeAttributeNS : function(namespaceURI, localName){
-                       var old = this.getAttributeNodeNS(namespaceURI, localName);
-                       old && this.removeAttributeNode(old);
-               },
-               
-               hasAttributeNS : function(namespaceURI, localName){
-                       return this.getAttributeNodeNS(namespaceURI, localName)!=null;
-               },
-               getAttributeNS : function(namespaceURI, localName){
-                       var attr = this.getAttributeNodeNS(namespaceURI, localName);
-                       return attr && attr.value || '';
-               },
-               setAttributeNS : function(namespaceURI, qualifiedName, value){
-                       var attr = this.ownerDocument.createAttributeNS(namespaceURI, qualifiedName);
-                       attr.value = attr.nodeValue = "" + value;
-                       this.setAttributeNode(attr);
-               },
-               getAttributeNodeNS : function(namespaceURI, localName){
-                       return this.attributes.getNamedItemNS(namespaceURI, localName);
-               },
-               
-               getElementsByTagName : function(tagName){
-                       return new LiveNodeList(this,function(base){
-                               var ls = [];
-                               _visitNode(base,function(node){
-                                       if(node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)){
-                                               ls.push(node);
-                                       }
-                               });
-                               return ls;
-                       });
-               },
-               getElementsByTagNameNS : function(namespaceURI, localName){
-                       return new LiveNodeList(this,function(base){
-                               var ls = [];
-                               _visitNode(base,function(node){
-                                       if(node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)){
-                                               ls.push(node);
-                                       }
-                               });
-                               return ls;
-                               
-                       });
-               }
-       };
-       Document.prototype.getElementsByTagName = Element.prototype.getElementsByTagName;
-       Document.prototype.getElementsByTagNameNS = Element.prototype.getElementsByTagNameNS;
-
-
-       _extends(Element,Node);
-       function Attr() {
-       }Attr.prototype.nodeType = ATTRIBUTE_NODE;
-       _extends(Attr,Node);
-
-
-       function CharacterData() {
-       }CharacterData.prototype = {
-               data : '',
-               substringData : function(offset, count) {
-                       return this.data.substring(offset, offset+count);
-               },
-               appendData: function(text) {
-                       text = this.data+text;
-                       this.nodeValue = this.data = text;
-                       this.length = text.length;
-               },
-               insertData: function(offset,text) {
-                       this.replaceData(offset,0,text);
-               
-               },
-               appendChild:function(newChild){
-                       throw new Error(ExceptionMessage[HIERARCHY_REQUEST_ERR])
-               },
-               deleteData: function(offset, count) {
-                       this.replaceData(offset,count,"");
-               },
-               replaceData: function(offset, count, text) {
-                       var start = this.data.substring(0,offset);
-                       var end = this.data.substring(offset+count);
-                       text = start + text + end;
-                       this.nodeValue = this.data = text;
-                       this.length = text.length;
-               }
-       };
-       _extends(CharacterData,Node);
-       function Text() {
-       }Text.prototype = {
-               nodeName : "#text",
-               nodeType : TEXT_NODE,
-               splitText : function(offset) {
-                       var text = this.data;
-                       var newText = text.substring(offset);
-                       text = text.substring(0, offset);
-                       this.data = this.nodeValue = text;
-                       this.length = text.length;
-                       var newNode = this.ownerDocument.createTextNode(newText);
-                       if(this.parentNode){
-                               this.parentNode.insertBefore(newNode, this.nextSibling);
-                       }
-                       return newNode;
-               }
-       };
-       _extends(Text,CharacterData);
-       function Comment() {
-       }Comment.prototype = {
-               nodeName : "#comment",
-               nodeType : COMMENT_NODE
-       };
-       _extends(Comment,CharacterData);

 
 

-       function CDATASection() {
-       }CDATASection.prototype = {
-               nodeName : "#cdata-section",
-               nodeType : CDATA_SECTION_NODE
-       };
-       _extends(CDATASection,CharacterData);
+       function rendererFeatures(context) {
+         var dispatch = dispatch$8('change', 'redraw');
+         var features = utilRebind({}, dispatch, 'on');

 
 

+         var _deferred = new Set();

 
 

-       function DocumentType() {
-       }DocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;
-       _extends(DocumentType,Node);
+         var traffic_roads = {
+           'motorway': true,
+           'motorway_link': true,
+           'trunk': true,
+           'trunk_link': true,
+           'primary': true,
+           'primary_link': true,
+           'secondary': true,
+           'secondary_link': true,
+           'tertiary': true,
+           'tertiary_link': true,
+           'residential': true,
+           'unclassified': true,
+           'living_street': true
+         };
+         var service_roads = {
+           'service': true,
+           'road': true,
+           'track': true
+         };
+         var paths = {
+           'path': true,
+           'footway': true,
+           'cycleway': true,
+           'bridleway': true,
+           'steps': true,
+           'pedestrian': true
+         };
+         var past_futures = {
+           'proposed': true,
+           'construction': true,
+           'abandoned': true,
+           'dismantled': true,
+           'disused': true,
+           'razed': true,
+           'demolished': true,
+           'obliterated': true
+         };
+         var _cullFactor = 1;
+         var _cache = {};
+         var _rules = {};
+         var _stats = {};
+         var _keys = [];
+         var _hidden = [];
+         var _forceVisible = {};

 
 

-       function Notation() {
-       }Notation.prototype.nodeType = NOTATION_NODE;
-       _extends(Notation,Node);
+         function update() {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
+             var disabled = features.disabled();

 
 

-       function Entity() {
-       }Entity.prototype.nodeType = ENTITY_NODE;
-       _extends(Entity,Node);
+             if (disabled.length) {
+               hash.disable_features = disabled.join(',');
+             } else {
+               delete hash.disable_features;
+             }

 
 

-       function EntityReference() {
-       }EntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;
-       _extends(EntityReference,Node);
+             window.location.replace('#' + utilQsString(hash, true));
+             corePreferences('disabled-features', disabled.join(','));
+           }

 
 

-       function DocumentFragment() {
-       }DocumentFragment.prototype.nodeName =  "#document-fragment";
-       DocumentFragment.prototype.nodeType =   DOCUMENT_FRAGMENT_NODE;
-       _extends(DocumentFragment,Node);
+           _hidden = features.hidden();
+           dispatch.call('change');
+           dispatch.call('redraw');
+         }

 
 

+         function defineRule(k, filter, max) {
+           var isEnabled = true;

 
 

-       function ProcessingInstruction() {
-       }
-       ProcessingInstruction.prototype.nodeType = PROCESSING_INSTRUCTION_NODE;
-       _extends(ProcessingInstruction,Node);
-       function XMLSerializer$1(){}
-       XMLSerializer$1.prototype.serializeToString = function(node,isHtml,nodeFilter){
-               return nodeSerializeToString.call(node,isHtml,nodeFilter);
-       };
-       Node.prototype.toString = nodeSerializeToString;
-       function nodeSerializeToString(isHtml,nodeFilter){
-               var buf = [];
-               var refNode = this.nodeType == 9?this.documentElement:this;
-               var prefix = refNode.prefix;
-               var uri = refNode.namespaceURI;
-               
-               if(uri && prefix == null){
-                       //console.log(prefix)
-                       var prefix = refNode.lookupPrefix(uri);
-                       if(prefix == null){
-                               //isHTML = true;
-                               var visibleNamespaces=[
-                               {namespace:uri,prefix:null} ];
-                       }
-               }
-               serializeToString(this,buf,isHtml,nodeFilter,visibleNamespaces);
-               //console.log('###',this.nodeType,uri,prefix,buf.join(''))
-               return buf.join('');
-       }
-       function needNamespaceDefine(node,isHTML, visibleNamespaces) {
-               var prefix = node.prefix||'';
-               var uri = node.namespaceURI;
-               if (!prefix && !uri){
-                       return false;
-               }
-               if (prefix === "xml" && uri === "http://www.w3.org/XML/1998/namespace" 
-                       || uri == 'http://www.w3.org/2000/xmlns/'){
-                       return false;
-               }
-               
-               var i = visibleNamespaces.length; 
-               //console.log('@@@@',node.tagName,prefix,uri,visibleNamespaces)
-               while (i--) {
-                       var ns = visibleNamespaces[i];
-                       // get namespace prefix
-                       //console.log(node.nodeType,node.tagName,ns.prefix,prefix)
-                       if (ns.prefix == prefix){
-                               return ns.namespace != uri;
-                       }
-               }
-               //console.log(isHTML,uri,prefix=='')
-               //if(isHTML && prefix ==null && uri == 'http://www.w3.org/1999/xhtml'){
-               //      return false;
-               //}
-               //node.flag = '11111'
-               //console.error(3,true,node.flag,node.prefix,node.namespaceURI)
-               return true;
-       }
-       function serializeToString(node,buf,isHTML,nodeFilter,visibleNamespaces){
-               if(nodeFilter){
-                       node = nodeFilter(node);
-                       if(node){
-                               if(typeof node == 'string'){
-                                       buf.push(node);
-                                       return;
-                               }
-                       }else {
-                               return;
-                       }
-                       //buf.sort.apply(attrs, attributeSorter);
-               }
-               switch(node.nodeType){
-               case ELEMENT_NODE:
-                       if (!visibleNamespaces) { visibleNamespaces = []; }
-                       var startVisibleNamespaces = visibleNamespaces.length;
-                       var attrs = node.attributes;
-                       var len = attrs.length;
-                       var child = node.firstChild;
-                       var nodeName = node.tagName;
-                       
-                       isHTML =  (htmlns === node.namespaceURI) ||isHTML; 
-                       buf.push('<',nodeName);
-                       
-                       
-                       
-                       for(var i=0;i<len;i++){
-                               // add namespaces for attributes
-                               var attr = attrs.item(i);
-                               if (attr.prefix == 'xmlns') {
-                                       visibleNamespaces.push({ prefix: attr.localName, namespace: attr.value });
-                               }else if(attr.nodeName == 'xmlns'){
-                                       visibleNamespaces.push({ prefix: '', namespace: attr.value });
-                               }
-                       }
-                       for(var i=0;i<len;i++){
-                               var attr = attrs.item(i);
-                               if (needNamespaceDefine(attr,isHTML, visibleNamespaces)) {
-                                       var prefix = attr.prefix||'';
-                                       var uri = attr.namespaceURI;
-                                       var ns = prefix ? ' xmlns:' + prefix : " xmlns";
-                                       buf.push(ns, '="' , uri , '"');
-                                       visibleNamespaces.push({ prefix: prefix, namespace:uri });
-                               }
-                               serializeToString(attr,buf,isHTML,nodeFilter,visibleNamespaces);
-                       }
-                       // add namespace for current node               
-                       if (needNamespaceDefine(node,isHTML, visibleNamespaces)) {
-                               var prefix = node.prefix||'';
-                               var uri = node.namespaceURI;
-                               var ns = prefix ? ' xmlns:' + prefix : " xmlns";
-                               buf.push(ns, '="' , uri , '"');
-                               visibleNamespaces.push({ prefix: prefix, namespace:uri });
-                       }
-                       
-                       if(child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)){
-                               buf.push('>');
-                               //if is cdata child node
-                               if(isHTML && /^script$/i.test(nodeName)){
-                                       while(child){
-                                               if(child.data){
-                                                       buf.push(child.data);
-                                               }else {
-                                                       serializeToString(child,buf,isHTML,nodeFilter,visibleNamespaces);
-                                               }
-                                               child = child.nextSibling;
-                                       }
-                               }else
-                               {
-                                       while(child){
-                                               serializeToString(child,buf,isHTML,nodeFilter,visibleNamespaces);
-                                               child = child.nextSibling;
-                                       }
-                               }
-                               buf.push('</',nodeName,'>');
-                       }else {
-                               buf.push('/>');
-                       }
-                       // remove added visible namespaces
-                       //visibleNamespaces.length = startVisibleNamespaces;
-                       return;
-               case DOCUMENT_NODE:
-               case DOCUMENT_FRAGMENT_NODE:
-                       var child = node.firstChild;
-                       while(child){
-                               serializeToString(child,buf,isHTML,nodeFilter,visibleNamespaces);
-                               child = child.nextSibling;
-                       }
-                       return;
-               case ATTRIBUTE_NODE:
-                       return buf.push(' ',node.name,'="',node.value.replace(/[<&"]/g,_xmlEncoder),'"');
-               case TEXT_NODE:
-                       return buf.push(node.data.replace(/[<&]/g,_xmlEncoder));
-               case CDATA_SECTION_NODE:
-                       return buf.push( '<![CDATA[',node.data,']]>');
-               case COMMENT_NODE:
-                       return buf.push( "<!--",node.data,"-->");
-               case DOCUMENT_TYPE_NODE:
-                       var pubid = node.publicId;
-                       var sysid = node.systemId;
-                       buf.push('<!DOCTYPE ',node.name);
-                       if(pubid){
-                               buf.push(' PUBLIC "',pubid);
-                               if (sysid && sysid!='.') {
-                                       buf.push( '" "',sysid);
-                               }
-                               buf.push('">');
-                       }else if(sysid && sysid!='.'){
-                               buf.push(' SYSTEM "',sysid,'">');
-                       }else {
-                               var sub = node.internalSubset;
-                               if(sub){
-                                       buf.push(" [",sub,"]");
-                               }
-                               buf.push(">");
-                       }
-                       return;
-               case PROCESSING_INSTRUCTION_NODE:
-                       return buf.push( "<?",node.target," ",node.data,"?>");
-               case ENTITY_REFERENCE_NODE:
-                       return buf.push( '&',node.nodeName,';');
-               //case ENTITY_NODE:
-               //case NOTATION_NODE:
-               default:
-                       buf.push('??',node.nodeName);
-               }
-       }
-       function importNode(doc,node,deep){
-               var node2;
-               switch (node.nodeType) {
-               case ELEMENT_NODE:
-                       node2 = node.cloneNode(false);
-                       node2.ownerDocument = doc;
-                       //var attrs = node2.attributes;
-                       //var len = attrs.length;
-                       //for(var i=0;i<len;i++){
-                               //node2.setAttributeNodeNS(importNode(doc,attrs.item(i),deep));
-                       //}
-               case DOCUMENT_FRAGMENT_NODE:
-                       break;
-               case ATTRIBUTE_NODE:
-                       deep = true;
-                       break;
-               //case ENTITY_REFERENCE_NODE:
-               //case PROCESSING_INSTRUCTION_NODE:
-               ////case TEXT_NODE:
-               //case CDATA_SECTION_NODE:
-               //case COMMENT_NODE:
-               //      deep = false;
-               //      break;
-               //case DOCUMENT_NODE:
-               //case DOCUMENT_TYPE_NODE:
-               //cannot be imported.
-               //case ENTITY_NODE:
-               //case NOTATION_NODE：
-               //can not hit in level3
-               //default:throw e;
-               }
-               if(!node2){
-                       node2 = node.cloneNode(false);//false
-               }
-               node2.ownerDocument = doc;
-               node2.parentNode = null;
-               if(deep){
-                       var child = node.firstChild;
-                       while(child){
-                               node2.appendChild(importNode(doc,child,deep));
-                               child = child.nextSibling;
-                       }
-               }
-               return node2;
-       }
-       //
-       //var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,
-       //                                      attributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};
-       function cloneNode(doc,node,deep){
-               var node2 = new node.constructor();
-               for(var n in node){
-                       var v = node[n];
-                       if(typeof v != 'object' ){
-                               if(v != node2[n]){
-                                       node2[n] = v;
-                               }
-                       }
-               }
-               if(node.childNodes){
-                       node2.childNodes = new NodeList();
-               }
-               node2.ownerDocument = doc;
-               switch (node2.nodeType) {
-               case ELEMENT_NODE:
-                       var attrs       = node.attributes;
-                       var attrs2      = node2.attributes = new NamedNodeMap();
-                       var len = attrs.length;
-                       attrs2._ownerElement = node2;
-                       for(var i=0;i<len;i++){
-                               node2.setAttributeNode(cloneNode(doc,attrs.item(i),true));
-                       }
-                       break;  case ATTRIBUTE_NODE:
-                       deep = true;
-               }
-               if(deep){
-                       var child = node.firstChild;
-                       while(child){
-                               node2.appendChild(cloneNode(doc,child,deep));
-                               child = child.nextSibling;
-                       }
-               }
-               return node2;
-       }
-
-       function __set__(object,key,value){
-               object[key] = value;
-       }
-       //do dynamic
-       try{
-               if(Object.defineProperty){
-                       Object.defineProperty(LiveNodeList.prototype,'length',{
-                               get:function(){
-                                       _updateLiveList(this);
-                                       return this.$$length;
-                               }
-                       });
-                       Object.defineProperty(Node.prototype,'textContent',{
-                               get:function(){
-                                       return getTextContent(this);
-                               },
-                               set:function(data){
-                                       switch(this.nodeType){
-                                       case ELEMENT_NODE:
-                                       case DOCUMENT_FRAGMENT_NODE:
-                                               while(this.firstChild){
-                                                       this.removeChild(this.firstChild);
-                                               }
-                                               if(data || String(data)){
-                                                       this.appendChild(this.ownerDocument.createTextNode(data));
-                                               }
-                                               break;
-                                       default:
-                                               //TODO:
-                                               this.data = data;
-                                               this.value = data;
-                                               this.nodeValue = data;
-                                       }
-                               }
-                       });
-                       
-                       function getTextContent(node){
-                               switch(node.nodeType){
-                               case ELEMENT_NODE:
-                               case DOCUMENT_FRAGMENT_NODE:
-                                       var buf = [];
-                                       node = node.firstChild;
-                                       while(node){
-                                               if(node.nodeType!==7 && node.nodeType !==8){
-                                                       buf.push(getTextContent(node));
-                                               }
-                                               node = node.nextSibling;
-                                       }
-                                       return buf.join('');
-                               default:
-                                       return node.nodeValue;
-                               }
-                       }
-                       __set__ = function(object,key,value){
-                               //console.log(value)
-                               object['$$'+key] = value;
-                       };
-               }
-       }catch(e){//ie8
-       }
-
-       //if(typeof require == 'function'){
-               var DOMImplementation_1 = DOMImplementation;
-               var XMLSerializer_1 = XMLSerializer$1;
-       //}
-
-       var dom = {
-               DOMImplementation: DOMImplementation_1,
-               XMLSerializer: XMLSerializer_1
-       };
+           _keys.push(k);

 
 

-       var domParser = createCommonjsModule(function (module, exports) {
-       function DOMParser(options){
-               this.options = options ||{locator:{}};
-               
-       }
-       DOMParser.prototype.parseFromString = function(source,mimeType){
-               var options = this.options;
-               var sax =  new XMLReader();
-               var domBuilder = options.domBuilder || new DOMHandler();//contentHandler and LexicalHandler
-               var errorHandler = options.errorHandler;
-               var locator = options.locator;
-               var defaultNSMap = options.xmlns||{};
-               var entityMap = {'lt':'<','gt':'>','amp':'&','quot':'"','apos':"'"};
-               if(locator){
-                       domBuilder.setDocumentLocator(locator);
-               }
-               
-               sax.errorHandler = buildErrorHandler(errorHandler,domBuilder,locator);
-               sax.domBuilder = options.domBuilder || domBuilder;
-               if(/\/x?html?$/.test(mimeType)){
-                       entityMap.nbsp = '\xa0';
-                       entityMap.copy = '\xa9';
-                       defaultNSMap['']= 'http://www.w3.org/1999/xhtml';
-               }
-               defaultNSMap.xml = defaultNSMap.xml || 'http://www.w3.org/XML/1998/namespace';
-               if(source){
-                       sax.parse(source,defaultNSMap,entityMap);
-               }else {
-                       sax.errorHandler.error("invalid doc source");
-               }
-               return domBuilder.doc;
-       };
-       function buildErrorHandler(errorImpl,domBuilder,locator){
-               if(!errorImpl){
-                       if(domBuilder instanceof DOMHandler){
-                               return domBuilder;
-                       }
-                       errorImpl = domBuilder ;
-               }
-               var errorHandler = {};
-               var isCallback = errorImpl instanceof Function;
-               locator = locator||{};
-               function build(key){
-                       var fn = errorImpl[key];
-                       if(!fn && isCallback){
-                               fn = errorImpl.length == 2?function(msg){errorImpl(key,msg);}:errorImpl;
-                       }
-                       errorHandler[key] = fn && function(msg){
-                               fn('[xmldom '+key+']\t'+msg+_locator(locator));
-                       }||function(){};
-               }
-               build('warning');
-               build('error');
-               build('fatalError');
-               return errorHandler;
-       }
-
-       //console.log('#\n\n\n\n\n\n\n####')
-       /**
-        * +ContentHandler+ErrorHandler
-        * +LexicalHandler+EntityResolver2
-        * -DeclHandler-DTDHandler 
-        * 
-        * DefaultHandler:EntityResolver, DTDHandler, ContentHandler, ErrorHandler
-        * DefaultHandler2:DefaultHandler,LexicalHandler, DeclHandler, EntityResolver2
-        * @link http://www.saxproject.org/apidoc/org/xml/sax/helpers/DefaultHandler.html
-        */
-       function DOMHandler() {
-           this.cdata = false;
-       }
-       function position(locator,node){
-               node.lineNumber = locator.lineNumber;
-               node.columnNumber = locator.columnNumber;
-       }
-       /**
-        * @see org.xml.sax.ContentHandler#startDocument
-        * @link http://www.saxproject.org/apidoc/org/xml/sax/ContentHandler.html
-        */ 
-       DOMHandler.prototype = {
-               startDocument : function() {
-               this.doc = new DOMImplementation().createDocument(null, null, null);
-               if (this.locator) {
-                       this.doc.documentURI = this.locator.systemId;
-               }
-               },
-               startElement:function(namespaceURI, localName, qName, attrs) {
-                       var doc = this.doc;
-                   var el = doc.createElementNS(namespaceURI, qName||localName);
-                   var len = attrs.length;
-                   appendElement(this, el);
-                   this.currentElement = el;
-                   
-                       this.locator && position(this.locator,el);
-                   for (var i = 0 ; i < len; i++) {
-                       var namespaceURI = attrs.getURI(i);
-                       var value = attrs.getValue(i);
-                       var qName = attrs.getQName(i);
-                               var attr = doc.createAttributeNS(namespaceURI, qName);
-                               this.locator &&position(attrs.getLocator(i),attr);
-                               attr.value = attr.nodeValue = value;
-                               el.setAttributeNode(attr);
-                   }
-               },
-               endElement:function(namespaceURI, localName, qName) {
-                       var current = this.currentElement;
-                       var tagName = current.tagName;
-                       this.currentElement = current.parentNode;
-               },
-               startPrefixMapping:function(prefix, uri) {
-               },
-               endPrefixMapping:function(prefix) {
-               },
-               processingInstruction:function(target, data) {
-                   var ins = this.doc.createProcessingInstruction(target, data);
-                   this.locator && position(this.locator,ins);
-                   appendElement(this, ins);
-               },
-               ignorableWhitespace:function(ch, start, length) {
-               },
-               characters:function(chars, start, length) {
-                       chars = _toString.apply(this,arguments);
-                       //console.log(chars)
-                       if(chars){
-                               if (this.cdata) {
-                                       var charNode = this.doc.createCDATASection(chars);
-                               } else {
-                                       var charNode = this.doc.createTextNode(chars);
-                               }
-                               if(this.currentElement){
-                                       this.currentElement.appendChild(charNode);
-                               }else if(/^\s*$/.test(chars)){
-                                       this.doc.appendChild(charNode);
-                                       //process xml
-                               }
-                               this.locator && position(this.locator,charNode);
-                       }
-               },
-               skippedEntity:function(name) {
-               },
-               endDocument:function() {
-                       this.doc.normalize();
-               },
-               setDocumentLocator:function (locator) {
-                   if(this.locator = locator){// && !('lineNumber' in locator)){
-                       locator.lineNumber = 0;
-                   }
-               },
-               //LexicalHandler
-               comment:function(chars, start, length) {
-                       chars = _toString.apply(this,arguments);
-                   var comm = this.doc.createComment(chars);
-                   this.locator && position(this.locator,comm);
-                   appendElement(this, comm);
-               },
-               
-               startCDATA:function() {
-                   //used in characters() methods
-                   this.cdata = true;
-               },
-               endCDATA:function() {
-                   this.cdata = false;
-               },
-               
-               startDTD:function(name, publicId, systemId) {
-                       var impl = this.doc.implementation;
-                   if (impl && impl.createDocumentType) {
-                       var dt = impl.createDocumentType(name, publicId, systemId);
-                       this.locator && position(this.locator,dt);
-                       appendElement(this, dt);
-                   }
-               },
-               /**
-                * @see org.xml.sax.ErrorHandler
-                * @link http://www.saxproject.org/apidoc/org/xml/sax/ErrorHandler.html
-                */
-               warning:function(error) {
-                       console.warn('[xmldom warning]\t'+error,_locator(this.locator));
-               },
-               error:function(error) {
-                       console.error('[xmldom error]\t'+error,_locator(this.locator));
-               },
-               fatalError:function(error) {
-                       console.error('[xmldom fatalError]\t'+error,_locator(this.locator));
-                   throw error;
-               }
-       };
-       function _locator(l){
-               if(l){
-                       return '\n@'+(l.systemId ||'')+'#[line:'+l.lineNumber+',col:'+l.columnNumber+']'
-               }
-       }
-       function _toString(chars,start,length){
-               if(typeof chars == 'string'){
-                       return chars.substr(start,length)
-               }else {//java sax connect width xmldom on rhino(what about: "? && !(chars instanceof String)")
-                       if(chars.length >= start+length || start){
-                               return new java.lang.String(chars,start,length)+'';
-                       }
-                       return chars;
-               }
-       }
+           _rules[k] = {
+             filter: filter,
+             enabled: isEnabled,
+             // whether the user wants it enabled..
+             count: 0,
+             currentMax: max || Infinity,
+             defaultMax: max || Infinity,
+             enable: function enable() {
+               this.enabled = true;
+               this.currentMax = this.defaultMax;
+             },
+             disable: function disable() {
+               this.enabled = false;
+               this.currentMax = 0;
+             },
+             hidden: function hidden() {
+               return this.count === 0 && !this.enabled || this.count > this.currentMax * _cullFactor;
+             },
+             autoHidden: function autoHidden() {
+               return this.hidden() && this.currentMax > 0;
+             }
+           };
+         }

 
 

-       /*
-        * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/LexicalHandler.html
-        * used method of org.xml.sax.ext.LexicalHandler:
-        *  #comment(chars, start, length)
-        *  #startCDATA()
-        *  #endCDATA()
-        *  #startDTD(name, publicId, systemId)
-        *
-        *
-        * IGNORED method of org.xml.sax.ext.LexicalHandler:
-        *  #endDTD()
-        *  #startEntity(name)
-        *  #endEntity(name)
-        *
-        *
-        * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/DeclHandler.html
-        * IGNORED method of org.xml.sax.ext.DeclHandler
-        *      #attributeDecl(eName, aName, type, mode, value)
-        *  #elementDecl(name, model)
-        *  #externalEntityDecl(name, publicId, systemId)
-        *  #internalEntityDecl(name, value)
-        * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/EntityResolver2.html
-        * IGNORED method of org.xml.sax.EntityResolver2
-        *  #resolveEntity(String name,String publicId,String baseURI,String systemId)
-        *  #resolveEntity(publicId, systemId)
-        *  #getExternalSubset(name, baseURI)
-        * @link http://www.saxproject.org/apidoc/org/xml/sax/DTDHandler.html
-        * IGNORED method of org.xml.sax.DTDHandler
-        *  #notationDecl(name, publicId, systemId) {};
-        *  #unparsedEntityDecl(name, publicId, systemId, notationName) {};
-        */
-       "endDTD,startEntity,endEntity,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,resolveEntity,getExternalSubset,notationDecl,unparsedEntityDecl".replace(/\w+/g,function(key){
-               DOMHandler.prototype[key] = function(){return null};
-       });
+         defineRule('points', function isPoint(tags, geometry) {
+           return geometry === 'point';
+         }, 200);
+         defineRule('traffic_roads', function isTrafficRoad(tags) {
+           return traffic_roads[tags.highway];
+         });
+         defineRule('service_roads', function isServiceRoad(tags) {
+           return service_roads[tags.highway];
+         });
+         defineRule('paths', function isPath(tags) {
+           return paths[tags.highway];
+         });
+         defineRule('buildings', function isBuilding(tags) {
+           return !!tags.building && tags.building !== 'no' || tags.parking === 'multi-storey' || tags.parking === 'sheds' || tags.parking === 'carports' || tags.parking === 'garage_boxes';
+         }, 250);
+         defineRule('building_parts', function isBuildingPart(tags) {
+           return tags['building:part'];
+         });
+         defineRule('indoor', function isIndoor(tags) {
+           return tags.indoor;
+         });
+         defineRule('landuse', function isLanduse(tags, geometry) {
+           return geometry === 'area' && !_rules.buildings.filter(tags) && !_rules.building_parts.filter(tags) && !_rules.indoor.filter(tags) && !_rules.water.filter(tags) && !_rules.pistes.filter(tags);
+         });
+         defineRule('boundaries', function isBoundary(tags) {
+           return !!tags.boundary && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway] || tags.waterway || tags.railway || tags.landuse || tags.natural || tags.building || tags.power);
+         });
+         defineRule('water', function isWater(tags) {
+           return !!tags.waterway || tags.natural === 'water' || tags.natural === 'coastline' || tags.natural === 'bay' || tags.landuse === 'pond' || tags.landuse === 'basin' || tags.landuse === 'reservoir' || tags.landuse === 'salt_pond';
+         });
+         defineRule('rail', function isRail(tags) {
+           return (!!tags.railway || tags.landuse === 'railway') && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]);
+         });
+         defineRule('pistes', function isPiste(tags) {
+           return tags['piste:type'];
+         });
+         defineRule('aerialways', function isPiste(tags) {
+           return tags.aerialway && tags.aerialway !== 'yes' && tags.aerialway !== 'station';
+         });
+         defineRule('power', function isPower(tags) {
+           return !!tags.power;
+         }); // contains a past/future tag, but not in active use as a road/path/cycleway/etc..

 
 

-       /* Private static helpers treated below as private instance methods, so don't need to add these to the public API; we might use a Relator to also get rid of non-standard public properties */
-       function appendElement (hander,node) {
-           if (!hander.currentElement) {
-               hander.doc.appendChild(node);
-           } else {
-               hander.currentElement.appendChild(node);
+         defineRule('past_future', function isPastFuture(tags) {
+           if (traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]) {
+             return false;

            }
            }

-       }//appendChild and setAttributeNS are preformance key

 
 

-       //if(typeof require == 'function'){
-               var XMLReader = sax.XMLReader;
-               var DOMImplementation = exports.DOMImplementation = dom.DOMImplementation;
-               exports.XMLSerializer = dom.XMLSerializer ;
-               exports.DOMParser = DOMParser;
-       //}
-       });
+           var strings = Object.keys(tags);

 
 

-       var togeojson = createCommonjsModule(function (module, exports) {
-       var toGeoJSON = (function() {
-
-           var removeSpace = /\s*/g,
-               trimSpace = /^\s*|\s*$/g,
-               splitSpace = /\s+/;
-           // generate a short, numeric hash of a string
-           function okhash(x) {
-               if (!x || !x.length) { return 0; }
-               for (var i = 0, h = 0; i < x.length; i++) {
-                   h = ((h << 5) - h) + x.charCodeAt(i) | 0;
-               } return h;
-           }
-           // all Y children of X
-           function get(x, y) { return x.getElementsByTagName(y); }
-           function attr(x, y) { return x.getAttribute(y); }
-           function attrf(x, y) { return parseFloat(attr(x, y)); }
-           // one Y child of X, if any, otherwise null
-           function get1(x, y) { var n = get(x, y); return n.length ? n[0] : null; }
-           // https://developer.mozilla.org/en-US/docs/Web/API/Node.normalize
-           function norm(el) { if (el.normalize) { el.normalize(); } return el; }
-           // cast array x into numbers
-           function numarray(x) {
-               for (var j = 0, o = []; j < x.length; j++) { o[j] = parseFloat(x[j]); }
-               return o;
-           }
-           // get the content of a text node, if any
-           function nodeVal(x) {
-               if (x) { norm(x); }
-               return (x && x.textContent) || '';
-           }
-           // get the contents of multiple text nodes, if present
-           function getMulti(x, ys) {
-               var o = {}, n, k;
-               for (k = 0; k < ys.length; k++) {
-                   n = get1(x, ys[k]);
-                   if (n) { o[ys[k]] = nodeVal(n); }
-               }
-               return o;
-           }
-           // add properties of Y to X, overwriting if present in both
-           function extend(x, y) { for (var k in y) { x[k] = y[k]; } }
-           // get one coordinate from a coordinate array, if any
-           function coord1(v) { return numarray(v.replace(removeSpace, '').split(',')); }
-           // get all coordinates from a coordinate array as [[],[]]
-           function coord(v) {
-               var coords = v.replace(trimSpace, '').split(splitSpace),
-                   o = [];
-               for (var i = 0; i < coords.length; i++) {
-                   o.push(coord1(coords[i]));
-               }
-               return o;
-           }
-           function coordPair(x) {
-               var ll = [attrf(x, 'lon'), attrf(x, 'lat')],
-                   ele = get1(x, 'ele'),
-                   // handle namespaced attribute in browser
-                   heartRate = get1(x, 'gpxtpx:hr') || get1(x, 'hr'),
-                   time = get1(x, 'time'),
-                   e;
-               if (ele) {
-                   e = parseFloat(nodeVal(ele));
-                   if (!isNaN(e)) {
-                       ll.push(e);
-                   }
-               }
-               return {
-                   coordinates: ll,
-                   time: time ? nodeVal(time) : null,
-                   heartRate: heartRate ? parseFloat(nodeVal(heartRate)) : null
-               };
-           }
+           for (var i = 0; i < strings.length; i++) {
+             var s = strings[i];

 
 

-           // create a new feature collection parent object
-           function fc() {
-               return {
-                   type: 'FeatureCollection',
-                   features: []
-               };
+             if (past_futures[s] || past_futures[tags[s]]) {
+               return true;
+             }

            }
 
            }
 

-           var serializer;
-           if (typeof XMLSerializer !== 'undefined') {
-               /* istanbul ignore next */
-               serializer = new XMLSerializer();
-           // only require xmldom in a node environment
-           } else if ( typeof process === 'object' && !process.browser) {
-               serializer = new (domParser.XMLSerializer)();
-           }
-           function xml2str(str) {
-               // IE9 will create a new XMLSerializer but it'll crash immediately.
-               // This line is ignored because we don't run coverage tests in IE9
-               /* istanbul ignore next */
-               if (str.xml !== undefined) { return str.xml; }
-               return serializer.serializeToString(str);
-           }
-
-           var t = {
-               kml: function(doc) {
-
-                   var gj = fc(),
-                       // styleindex keeps track of hashed styles in order to match features
-                       styleIndex = {}, styleByHash = {},
-                       // stylemapindex keeps track of style maps to expose in properties
-                       styleMapIndex = {},
-                       // atomic geospatial types supported by KML - MultiGeometry is
-                       // handled separately
-                       geotypes = ['Polygon', 'LineString', 'Point', 'Track', 'gx:Track'],
-                       // all root placemarks in the file
-                       placemarks = get(doc, 'Placemark'),
-                       styles = get(doc, 'Style'),
-                       styleMaps = get(doc, 'StyleMap');
-
-                   for (var k = 0; k < styles.length; k++) {
-                       var hash = okhash(xml2str(styles[k])).toString(16);
-                       styleIndex['#' + attr(styles[k], 'id')] = hash;
-                       styleByHash[hash] = styles[k];
-                   }
-                   for (var l = 0; l < styleMaps.length; l++) {
-                       styleIndex['#' + attr(styleMaps[l], 'id')] = okhash(xml2str(styleMaps[l])).toString(16);
-                       var pairs = get(styleMaps[l], 'Pair');
-                       var pairsMap = {};
-                       for (var m = 0; m < pairs.length; m++) {
-                           pairsMap[nodeVal(get1(pairs[m], 'key'))] = nodeVal(get1(pairs[m], 'styleUrl'));
-                       }
-                       styleMapIndex['#' + attr(styleMaps[l], 'id')] = pairsMap;
+           return false;
+         }); // Lines or areas that don't match another feature filter.
+         // IMPORTANT: The 'others' feature must be the last one defined,
+         //   so that code in getMatches can skip this test if `hasMatch = true`

 
 

-                   }
-                   for (var j = 0; j < placemarks.length; j++) {
-                       gj.features = gj.features.concat(getPlacemark(placemarks[j]));
-                   }
-                   function kmlColor(v) {
-                       var color, opacity;
-                       v = v || '';
-                       if (v.substr(0, 1) === '#') { v = v.substr(1); }
-                       if (v.length === 6 || v.length === 3) { color = v; }
-                       if (v.length === 8) {
-                           opacity = parseInt(v.substr(0, 2), 16) / 255;
-                           color = '#' + v.substr(6, 2) +
-                               v.substr(4, 2) +
-                               v.substr(2, 2);
-                       }
-                       return [color, isNaN(opacity) ? undefined : opacity];
-                   }
-                   function gxCoord(v) { return numarray(v.split(' ')); }
-                   function gxCoords(root) {
-                       var elems = get(root, 'coord'), coords = [], times = [];
-                       if (elems.length === 0) { elems = get(root, 'gx:coord'); }
-                       for (var i = 0; i < elems.length; i++) { coords.push(gxCoord(nodeVal(elems[i]))); }
-                       var timeElems = get(root, 'when');
-                       for (var j = 0; j < timeElems.length; j++) { times.push(nodeVal(timeElems[j])); }
-                       return {
-                           coords: coords,
-                           times: times
-                       };
-                   }
-                   function getGeometry(root) {
-                       var geomNode, geomNodes, i, j, k, geoms = [], coordTimes = [];
-                       if (get1(root, 'MultiGeometry')) { return getGeometry(get1(root, 'MultiGeometry')); }
-                       if (get1(root, 'MultiTrack')) { return getGeometry(get1(root, 'MultiTrack')); }
-                       if (get1(root, 'gx:MultiTrack')) { return getGeometry(get1(root, 'gx:MultiTrack')); }
-                       for (i = 0; i < geotypes.length; i++) {
-                           geomNodes = get(root, geotypes[i]);
-                           if (geomNodes) {
-                               for (j = 0; j < geomNodes.length; j++) {
-                                   geomNode = geomNodes[j];
-                                   if (geotypes[i] === 'Point') {
-                                       geoms.push({
-                                           type: 'Point',
-                                           coordinates: coord1(nodeVal(get1(geomNode, 'coordinates')))
-                                       });
-                                   } else if (geotypes[i] === 'LineString') {
-                                       geoms.push({
-                                           type: 'LineString',
-                                           coordinates: coord(nodeVal(get1(geomNode, 'coordinates')))
-                                       });
-                                   } else if (geotypes[i] === 'Polygon') {
-                                       var rings = get(geomNode, 'LinearRing'),
-                                           coords = [];
-                                       for (k = 0; k < rings.length; k++) {
-                                           coords.push(coord(nodeVal(get1(rings[k], 'coordinates'))));
-                                       }
-                                       geoms.push({
-                                           type: 'Polygon',
-                                           coordinates: coords
-                                       });
-                                   } else if (geotypes[i] === 'Track' ||
-                                       geotypes[i] === 'gx:Track') {
-                                       var track = gxCoords(geomNode);
-                                       geoms.push({
-                                           type: 'LineString',
-                                           coordinates: track.coords
-                                       });
-                                       if (track.times.length) { coordTimes.push(track.times); }
-                                   }
-                               }
-                           }
-                       }
-                       return {
-                           geoms: geoms,
-                           coordTimes: coordTimes
-                       };
-                   }
-                   function getPlacemark(root) {
-                       var geomsAndTimes = getGeometry(root), i, properties = {},
-                           name = nodeVal(get1(root, 'name')),
-                           address = nodeVal(get1(root, 'address')),
-                           styleUrl = nodeVal(get1(root, 'styleUrl')),
-                           description = nodeVal(get1(root, 'description')),
-                           timeSpan = get1(root, 'TimeSpan'),
-                           timeStamp = get1(root, 'TimeStamp'),
-                           extendedData = get1(root, 'ExtendedData'),
-                           lineStyle = get1(root, 'LineStyle'),
-                           polyStyle = get1(root, 'PolyStyle'),
-                           visibility = get1(root, 'visibility');
-
-                       if (!geomsAndTimes.geoms.length) { return []; }
-                       if (name) { properties.name = name; }
-                       if (address) { properties.address = address; }
-                       if (styleUrl) {
-                           if (styleUrl[0] !== '#') {
-                               styleUrl = '#' + styleUrl;
-                           }
+         defineRule('others', function isOther(tags, geometry) {
+           return geometry === 'line' || geometry === 'area';
+         });

 
 

-                           properties.styleUrl = styleUrl;
-                           if (styleIndex[styleUrl]) {
-                               properties.styleHash = styleIndex[styleUrl];
-                           }
-                           if (styleMapIndex[styleUrl]) {
-                               properties.styleMapHash = styleMapIndex[styleUrl];
-                               properties.styleHash = styleIndex[styleMapIndex[styleUrl].normal];
-                           }
-                           // Try to populate the lineStyle or polyStyle since we got the style hash
-                           var style = styleByHash[properties.styleHash];
-                           if (style) {
-                               if (!lineStyle) { lineStyle = get1(style, 'LineStyle'); }
-                               if (!polyStyle) { polyStyle = get1(style, 'PolyStyle'); }
-                           }
-                       }
-                       if (description) { properties.description = description; }
-                       if (timeSpan) {
-                           var begin = nodeVal(get1(timeSpan, 'begin'));
-                           var end = nodeVal(get1(timeSpan, 'end'));
-                           properties.timespan = { begin: begin, end: end };
-                       }
-                       if (timeStamp) {
-                           properties.timestamp = nodeVal(get1(timeStamp, 'when'));
-                       }
-                       if (lineStyle) {
-                           var linestyles = kmlColor(nodeVal(get1(lineStyle, 'color'))),
-                               color = linestyles[0],
-                               opacity = linestyles[1],
-                               width = parseFloat(nodeVal(get1(lineStyle, 'width')));
-                           if (color) { properties.stroke = color; }
-                           if (!isNaN(opacity)) { properties['stroke-opacity'] = opacity; }
-                           if (!isNaN(width)) { properties['stroke-width'] = width; }
-                       }
-                       if (polyStyle) {
-                           var polystyles = kmlColor(nodeVal(get1(polyStyle, 'color'))),
-                               pcolor = polystyles[0],
-                               popacity = polystyles[1],
-                               fill = nodeVal(get1(polyStyle, 'fill')),
-                               outline = nodeVal(get1(polyStyle, 'outline'));
-                           if (pcolor) { properties.fill = pcolor; }
-                           if (!isNaN(popacity)) { properties['fill-opacity'] = popacity; }
-                           if (fill) { properties['fill-opacity'] = fill === '1' ? properties['fill-opacity'] || 1 : 0; }
-                           if (outline) { properties['stroke-opacity'] = outline === '1' ? properties['stroke-opacity'] || 1 : 0; }
-                       }
-                       if (extendedData) {
-                           var datas = get(extendedData, 'Data'),
-                               simpleDatas = get(extendedData, 'SimpleData');
+         features.features = function () {
+           return _rules;
+         };

 
 

-                           for (i = 0; i < datas.length; i++) {
-                               properties[datas[i].getAttribute('name')] = nodeVal(get1(datas[i], 'value'));
-                           }
-                           for (i = 0; i < simpleDatas.length; i++) {
-                               properties[simpleDatas[i].getAttribute('name')] = nodeVal(simpleDatas[i]);
-                           }
-                       }
-                       if (visibility) {
-                           properties.visibility = nodeVal(visibility);
-                       }
-                       if (geomsAndTimes.coordTimes.length) {
-                           properties.coordTimes = (geomsAndTimes.coordTimes.length === 1) ?
-                               geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes;
-                       }
-                       var feature = {
-                           type: 'Feature',
-                           geometry: (geomsAndTimes.geoms.length === 1) ? geomsAndTimes.geoms[0] : {
-                               type: 'GeometryCollection',
-                               geometries: geomsAndTimes.geoms
-                           },
-                           properties: properties
-                       };
-                       if (attr(root, 'id')) { feature.id = attr(root, 'id'); }
-                       return [feature];
-                   }
-                   return gj;
-               },
-               gpx: function(doc) {
-                   var i,
-                       tracks = get(doc, 'trk'),
-                       routes = get(doc, 'rte'),
-                       waypoints = get(doc, 'wpt'),
-                       // a feature collection
-                       gj = fc(),
-                       feature;
-                   for (i = 0; i < tracks.length; i++) {
-                       feature = getTrack(tracks[i]);
-                       if (feature) { gj.features.push(feature); }
-                   }
-                   for (i = 0; i < routes.length; i++) {
-                       feature = getRoute(routes[i]);
-                       if (feature) { gj.features.push(feature); }
-                   }
-                   for (i = 0; i < waypoints.length; i++) {
-                       gj.features.push(getPoint(waypoints[i]));
-                   }
-                   function getPoints(node, pointname) {
-                       var pts = get(node, pointname),
-                           line = [],
-                           times = [],
-                           heartRates = [],
-                           l = pts.length;
-                       if (l < 2) { return {}; }  // Invalid line in GeoJSON
-                       for (var i = 0; i < l; i++) {
-                           var c = coordPair(pts[i]);
-                           line.push(c.coordinates);
-                           if (c.time) { times.push(c.time); }
-                           if (c.heartRate) { heartRates.push(c.heartRate); }
-                       }
-                       return {
-                           line: line,
-                           times: times,
-                           heartRates: heartRates
-                       };
-                   }
-                   function getTrack(node) {
-                       var segments = get(node, 'trkseg'),
-                           track = [],
-                           times = [],
-                           heartRates = [],
-                           line;
-                       for (var i = 0; i < segments.length; i++) {
-                           line = getPoints(segments[i], 'trkpt');
-                           if (line) {
-                               if (line.line) { track.push(line.line); }
-                               if (line.times && line.times.length) { times.push(line.times); }
-                               if (line.heartRates && line.heartRates.length) { heartRates.push(line.heartRates); }
-                           }
-                       }
-                       if (track.length === 0) { return; }
-                       var properties = getProperties(node);
-                       extend(properties, getLineStyle(get1(node, 'extensions')));
-                       if (times.length) { properties.coordTimes = track.length === 1 ? times[0] : times; }
-                       if (heartRates.length) { properties.heartRates = track.length === 1 ? heartRates[0] : heartRates; }
-                       return {
-                           type: 'Feature',
-                           properties: properties,
-                           geometry: {
-                               type: track.length === 1 ? 'LineString' : 'MultiLineString',
-                               coordinates: track.length === 1 ? track[0] : track
-                           }
-                       };
-                   }
-                   function getRoute(node) {
-                       var line = getPoints(node, 'rtept');
-                       if (!line.line) { return; }
-                       var prop = getProperties(node);
-                       extend(prop, getLineStyle(get1(node, 'extensions')));
-                       var routeObj = {
-                           type: 'Feature',
-                           properties: prop,
-                           geometry: {
-                               type: 'LineString',
-                               coordinates: line.line
-                           }
-                       };
-                       return routeObj;
-                   }
-                   function getPoint(node) {
-                       var prop = getProperties(node);
-                       extend(prop, getMulti(node, ['sym']));
-                       return {
-                           type: 'Feature',
-                           properties: prop,
-                           geometry: {
-                               type: 'Point',
-                               coordinates: coordPair(node).coordinates
-                           }
-                       };
-                   }
-                   function getLineStyle(extensions) {
-                       var style = {};
-                       if (extensions) {
-                           var lineStyle = get1(extensions, 'line');
-                           if (lineStyle) {
-                               var color = nodeVal(get1(lineStyle, 'color')),
-                                   opacity = parseFloat(nodeVal(get1(lineStyle, 'opacity'))),
-                                   width = parseFloat(nodeVal(get1(lineStyle, 'width')));
-                               if (color) { style.stroke = color; }
-                               if (!isNaN(opacity)) { style['stroke-opacity'] = opacity; }
-                               // GPX width is in mm, convert to px with 96 px per inch
-                               if (!isNaN(width)) { style['stroke-width'] = width * 96 / 25.4; }
-                           }
-                       }
-                       return style;
-                   }
-                   function getProperties(node) {
-                       var prop = getMulti(node, ['name', 'cmt', 'desc', 'type', 'time', 'keywords']),
-                           links = get(node, 'link');
-                       if (links.length) { prop.links = []; }
-                       for (var i = 0, link; i < links.length; i++) {
-                           link = { href: attr(links[i], 'href') };
-                           extend(link, getMulti(links[i], ['text', 'type']));
-                           prop.links.push(link);
-                       }
-                       return prop;
-                   }
-                   return gj;
-               }
-           };
-           return t;
-       })();
+         features.keys = function () {
+           return _keys;
+         };

 
 

-       { module.exports = toGeoJSON; }
-       });
+         features.enabled = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return _rules[k].enabled;
+             });
+           }

 
 

-       var _initialized = false;
-       var _enabled = false;
-       var _geojson;
+           return _rules[k] && _rules[k].enabled;
+         };

 
 

+         features.disabled = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return !_rules[k].enabled;
+             });
+           }

 
 

-       function svgData(projection, context, dispatch) {
-           var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-           var _showLabels = true;
-           var detected = utilDetect();
-           var layer = select(null);
-           var _vtService;
-           var _fileList;
-           var _template;
-           var _src;
+           return _rules[k] && !_rules[k].enabled;
+         };

 
 

+         features.hidden = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return _rules[k].hidden();
+             });
+           }

 
 

-           function init() {
-               if (_initialized) { return; }  // run once
+           return _rules[k] && _rules[k].hidden();
+         };

 
 

-               _geojson = {};
-               _enabled = true;
+         features.autoHidden = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return _rules[k].autoHidden();
+             });
+           }

 
 

-               function over() {
-                   event.stopPropagation();
-                   event.preventDefault();
-                   event.dataTransfer.dropEffect = 'copy';
-               }
+           return _rules[k] && _rules[k].autoHidden();
+         };

 
 

-               context.container()
-                   .attr('dropzone', 'copy')
-                   .on('drop.svgData', function() {
-                       event.stopPropagation();
-                       event.preventDefault();
-                       if (!detected.filedrop) { return; }
-                       drawData.fileList(event.dataTransfer.files);
-                   })
-                   .on('dragenter.svgData', over)
-                   .on('dragexit.svgData', over)
-                   .on('dragover.svgData', over);
+         features.enable = function (k) {
+           if (_rules[k] && !_rules[k].enabled) {
+             _rules[k].enable();

 
 

-               _initialized = true;
+             update();

            }
            }

+         };

 
 

+         features.enableAll = function () {
+           var didEnable = false;

 
 

-           function getService() {
-               if (services.vectorTile && !_vtService) {
-                   _vtService = services.vectorTile;
-                   _vtService.event.on('loadedData', throttledRedraw);
-               } else if (!services.vectorTile && _vtService) {
-                   _vtService = null;
-               }
+           for (var k in _rules) {
+             if (!_rules[k].enabled) {
+               didEnable = true;

 
 

-               return _vtService;
+               _rules[k].enable();
+             }

            }
 
            }
 

+           if (didEnable) update();
+         };

 
 

-           function showLayer() {
-               layerOn();
+         features.disable = function (k) {
+           if (_rules[k] && _rules[k].enabled) {
+             _rules[k].disable();

 
 

-               layer
-                   .style('opacity', 0)
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 1)
-                   .on('end', function () { dispatch.call('change'); });
+             update();

            }
            }

+         };

 
 

+         features.disableAll = function () {
+           var didDisable = false;

 
 

-           function hideLayer() {
-               throttledRedraw.cancel();
+           for (var k in _rules) {
+             if (_rules[k].enabled) {
+               didDisable = true;

 
 

-               layer
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 0)
-                   .on('end', layerOff);
+               _rules[k].disable();
+             }

            }
 
            }
 

+           if (didDisable) update();
+         };

 
 

-           function layerOn() {
-               layer.style('display', 'block');
-           }
+         features.toggle = function (k) {
+           if (_rules[k]) {
+             (function (f) {
+               return f.enabled ? f.disable() : f.enable();
+             })(_rules[k]);

 
 

+             update();
+           }
+         };

 
 

-           function layerOff() {
-               layer.selectAll('.viewfield-group').remove();
-               layer.style('display', 'none');
+         features.resetStats = function () {
+           for (var i = 0; i < _keys.length; i++) {
+             _rules[_keys[i]].count = 0;

            }
 
            }
 

+           dispatch.call('change');
+         };
+
+         features.gatherStats = function (d, resolver, dimensions) {
+           var needsRedraw = false;
+           var types = utilArrayGroupBy(d, 'type');
+           var entities = [].concat(types.relation || [], types.way || [], types.node || []);
+           var currHidden, geometry, matches, i, j;

 
 

-           // ensure that all geojson features in a collection have IDs
-           function ensureIDs(gj) {
-               if (!gj) { return null; }
+           for (i = 0; i < _keys.length; i++) {
+             _rules[_keys[i]].count = 0;
+           } // adjust the threshold for point/building culling based on viewport size..
+           // a _cullFactor of 1 corresponds to a 1000x1000px viewport..

 
 

-               if (gj.type === 'FeatureCollection') {
-                   for (var i = 0; i < gj.features.length; i++) {
-                       ensureFeatureID(gj.features[i]);
-                   }
-               } else {
-                   ensureFeatureID(gj);
-               }
-               return gj;
-           }

 
 

+           _cullFactor = dimensions[0] * dimensions[1] / 1000000;

 
 

-           // ensure that each single Feature object has a unique ID
-           function ensureFeatureID(feature) {
-               if (!feature) { return; }
-               feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
-               return feature;
-           }
+           for (i = 0; i < entities.length; i++) {
+             geometry = entities[i].geometry(resolver);
+             matches = Object.keys(features.getMatches(entities[i], resolver, geometry));

 
 

+             for (j = 0; j < matches.length; j++) {
+               _rules[matches[j]].count++;
+             }
+           }

 
 

-           // Prefer an array of Features instead of a FeatureCollection
-           function getFeatures(gj) {
-               if (!gj) { return []; }
+           currHidden = features.hidden();

 
 

-               if (gj.type === 'FeatureCollection') {
-                   return gj.features;
-               } else {
-                   return [gj];
-               }
+           if (currHidden !== _hidden) {
+             _hidden = currHidden;
+             needsRedraw = true;
+             dispatch.call('change');

            }
 
            }
 

+           return needsRedraw;
+         };

 
 

-           function featureKey(d) {
-               return d.__featurehash__;
+         features.stats = function () {
+           for (var i = 0; i < _keys.length; i++) {
+             _stats[_keys[i]] = _rules[_keys[i]].count;

            }
 
            }
 

+           return _stats;
+         };

 
 

-           function isPolygon(d) {
-               return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
+         features.clear = function (d) {
+           for (var i = 0; i < d.length; i++) {
+             features.clearEntity(d[i]);

            }
            }

+         };
+
+         features.clearEntity = function (entity) {
+           delete _cache[osmEntity.key(entity)];
+         };
+
+         features.reset = function () {
+           Array.from(_deferred).forEach(function (handle) {
+             window.cancelIdleCallback(handle);
+
+             _deferred["delete"](handle);
+           });
+           _cache = {};
+         }; // only certain relations are worth checking
+
+
+         function relationShouldBeChecked(relation) {
+           // multipolygon features have `area` geometry and aren't checked here
+           return relation.tags.type === 'boundary';
+         }

 
 

+         features.getMatches = function (entity, resolver, geometry) {
+           if (geometry === 'vertex' || geometry === 'relation' && !relationShouldBeChecked(entity)) return {};
+           var ent = osmEntity.key(entity);

 
 

-           function clipPathID(d) {
-               return 'ideditor-data-' + d.__featurehash__ + '-clippath';
+           if (!_cache[ent]) {
+             _cache[ent] = {};

            }
 
            }
 

+           if (!_cache[ent].matches) {
+             var matches = {};
+             var hasMatch = false;
+
+             for (var i = 0; i < _keys.length; i++) {
+               if (_keys[i] === 'others') {
+                 if (hasMatch) continue; // If an entity...
+                 //   1. is a way that hasn't matched other 'interesting' feature rules,
+
+                 if (entity.type === 'way') {
+                   var parents = features.getParents(entity, resolver, geometry); //   2a. belongs only to a single multipolygon relation
+
+                   if (parents.length === 1 && parents[0].isMultipolygon() || // 2b. or belongs only to boundary relations
+                   parents.length > 0 && parents.every(function (parent) {
+                     return parent.tags.type === 'boundary';
+                   })) {
+                     // ...then match whatever feature rules the parent relation has matched.
+                     // see #2548, #2887
+                     //
+                     // IMPORTANT:
+                     // For this to work, getMatches must be called on relations before ways.
+                     //
+                     var pkey = osmEntity.key(parents[0]);
+
+                     if (_cache[pkey] && _cache[pkey].matches) {
+                       matches = Object.assign({}, _cache[pkey].matches); // shallow copy
+
+                       continue;
+                     }
+                   }
+                 }
+               }
+
+               if (_rules[_keys[i]].filter(entity.tags, geometry)) {
+                 matches[_keys[i]] = hasMatch = true;
+               }
+             }

 
 

-           function featureClasses(d) {
-               return [
-                   'data' + d.__featurehash__,
-                   d.geometry.type,
-                   isPolygon(d) ? 'area' : '',
-                   d.__layerID__ || ''
-               ].filter(Boolean).join(' ');
+             _cache[ent].matches = matches;

            }
 
            }
 

+           return _cache[ent].matches;
+         };
+
+         features.getParents = function (entity, resolver, geometry) {
+           if (geometry === 'point') return [];
+           var ent = osmEntity.key(entity);

 
 

-           function drawData(selection) {
-               var vtService = getService();
-               var getPath = svgPath(projection).geojson;
-               var getAreaPath = svgPath(projection, null, true).geojson;
-               var hasData = drawData.hasData();
+           if (!_cache[ent]) {
+             _cache[ent] = {};
+           }

 
 

-               layer = selection.selectAll('.layer-mapdata')
-                   .data(_enabled && hasData ? [0] : []);
+           if (!_cache[ent].parents) {
+             var parents = [];

 
 

-               layer.exit()
-                   .remove();
+             if (geometry === 'vertex') {
+               parents = resolver.parentWays(entity);
+             } else {
+               // 'line', 'area', 'relation'
+               parents = resolver.parentRelations(entity);
+             }

 
 

-               layer = layer.enter()
-                   .append('g')
-                   .attr('class', 'layer-mapdata')
-                   .merge(layer);
+             _cache[ent].parents = parents;
+           }

 
 

-               var surface = context.surface();
-               if (!surface || surface.empty()) { return; }  // not ready to draw yet, starting up
+           return _cache[ent].parents;
+         };

 
 

+         features.isHiddenPreset = function (preset, geometry) {
+           if (!_hidden.length) return false;
+           if (!preset.tags) return false;
+           var test = preset.setTags({}, geometry);

 
 

-               // Gather data
-               var geoData, polygonData;
-               if (_template && vtService) {   // fetch data from vector tile service
-                   var sourceID = _template;
-                   vtService.loadTiles(sourceID, _template, projection);
-                   geoData = vtService.data(sourceID, projection);
-               } else {
-                   geoData = getFeatures(_geojson);
+           for (var key in _rules) {
+             if (_rules[key].filter(test, geometry)) {
+               if (_hidden.indexOf(key) !== -1) {
+                 return key;

                }
                }

-               geoData = geoData.filter(getPath);
-               polygonData = geoData.filter(isPolygon);
-

 
 

-               // Draw clip paths for polygons
-               var clipPaths = surface.selectAll('defs').selectAll('.clipPath-data')
-                  .data(polygonData, featureKey);
+               return false;
+             }
+           }

 
 

-               clipPaths.exit()
-                  .remove();
+           return false;
+         };

 
 

-               var clipPathsEnter = clipPaths.enter()
-                  .append('clipPath')
-                  .attr('class', 'clipPath-data')
-                  .attr('id', clipPathID);
+         features.isHiddenFeature = function (entity, resolver, geometry) {
+           if (!_hidden.length) return false;
+           if (!entity.version) return false;
+           if (_forceVisible[entity.id]) return false;
+           var matches = Object.keys(features.getMatches(entity, resolver, geometry));
+           return matches.length && matches.every(function (k) {
+             return features.hidden(k);
+           });
+         };

 
 

-               clipPathsEnter
-                  .append('path');
+         features.isHiddenChild = function (entity, resolver, geometry) {
+           if (!_hidden.length) return false;
+           if (!entity.version || geometry === 'point') return false;
+           if (_forceVisible[entity.id]) return false;
+           var parents = features.getParents(entity, resolver, geometry);
+           if (!parents.length) return false;

 
 

-               clipPaths.merge(clipPathsEnter)
-                  .selectAll('path')
-                  .attr('d', getAreaPath);
+           for (var i = 0; i < parents.length; i++) {
+             if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
+               return false;
+             }
+           }

 
 

+           return true;
+         };

 
 

-               // Draw fill, shadow, stroke layers
-               var datagroups = layer
-                   .selectAll('g.datagroup')
-                   .data(['fill', 'shadow', 'stroke']);
+         features.hasHiddenConnections = function (entity, resolver) {
+           if (!_hidden.length) return false;
+           var childNodes, connections;

 
 

-               datagroups = datagroups.enter()
-                   .append('g')
-                   .attr('class', function(d) { return 'datagroup datagroup-' + d; })
-                   .merge(datagroups);
+           if (entity.type === 'midpoint') {
+             childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
+             connections = [];
+           } else {
+             childNodes = entity.nodes ? resolver.childNodes(entity) : [];
+             connections = features.getParents(entity, resolver, entity.geometry(resolver));
+           } // gather ways connected to child nodes..

 
 
 
 

-               // Draw paths
-               var pathData = {
-                   fill: polygonData,
-                   shadow: geoData,
-                   stroke: geoData
-               };
+           connections = childNodes.reduce(function (result, e) {
+             return resolver.isShared(e) ? utilArrayUnion(result, resolver.parentWays(e)) : result;
+           }, connections);
+           return connections.some(function (e) {
+             return features.isHidden(e, resolver, e.geometry(resolver));
+           });
+         };

 
 

-               var paths = datagroups
-                   .selectAll('path')
-                   .data(function(layer) { return pathData[layer]; }, featureKey);
-
-               // exit
-               paths.exit()
-                   .remove();
-
-               // enter/update
-               paths = paths.enter()
-                   .append('path')
-                   .attr('class', function(d) {
-                       var datagroup = this.parentNode.__data__;
-                       return 'pathdata ' + datagroup + ' ' + featureClasses(d);
-                   })
-                   .attr('clip-path', function(d) {
-                       var datagroup = this.parentNode.__data__;
-                       return datagroup === 'fill' ? ('url(#' + clipPathID(d) + ')') : null;
-                   })
-                   .merge(paths)
-                   .attr('d', function(d) {
-                       var datagroup = this.parentNode.__data__;
-                       return datagroup === 'fill' ? getAreaPath(d) : getPath(d);
-                   });
+         features.isHidden = function (entity, resolver, geometry) {
+           if (!_hidden.length) return false;
+           if (!entity.version) return false;
+           var fn = geometry === 'vertex' ? features.isHiddenChild : features.isHiddenFeature;
+           return fn(entity, resolver, geometry);
+         };

 
 

+         features.filter = function (d, resolver) {
+           if (!_hidden.length) return d;
+           var result = [];

 
 

-               // Draw labels
-               layer
-                   .call(drawLabels, 'label-halo', geoData)
-                   .call(drawLabels, 'label', geoData);
+           for (var i = 0; i < d.length; i++) {
+             var entity = d[i];

 
 

+             if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
+               result.push(entity);
+             }
+           }

 
 

-               function drawLabels(selection, textClass, data) {
-                   var labelPath = d3_geoPath(projection);
-                   var labelData = data.filter(function(d) {
-                       return _showLabels && d.properties && (d.properties.desc || d.properties.name);
-                   });
+           return result;
+         };

 
 

-                   var labels = selection.selectAll('text.' + textClass)
-                       .data(labelData, featureKey);
+         features.forceVisible = function (entityIDs) {
+           if (!arguments.length) return Object.keys(_forceVisible);
+           _forceVisible = {};

 
 

-                   // exit
-                   labels.exit()
-                       .remove();
+           for (var i = 0; i < entityIDs.length; i++) {
+             _forceVisible[entityIDs[i]] = true;
+             var entity = context.hasEntity(entityIDs[i]);

 
 

-                   // enter/update
-                   labels = labels.enter()
-                       .append('text')
-                       .attr('class', function(d) { return textClass + ' ' + featureClasses(d); })
-                       .merge(labels)
-                       .text(function(d) {
-                           return d.properties.desc || d.properties.name;
-                       })
-                       .attr('x', function(d) {
-                           var centroid = labelPath.centroid(d);
-                           return centroid[0] + 11;
-                       })
-                       .attr('y', function(d) {
-                           var centroid = labelPath.centroid(d);
-                           return centroid[1];
-                       });
+             if (entity && entity.type === 'relation') {
+               // also show relation members (one level deep)
+               for (var j in entity.members) {
+                 _forceVisible[entity.members[j].id] = true;

                }
                }

+             }

            }
 
            }
 

+           return features;
+         };

 
 

-           function getExtension(fileName) {
-               if (!fileName) { return; }
+         features.init = function () {
+           var storage = corePreferences('disabled-features');

 
 

-               var re = /\.(gpx|kml|(geo)?json)$/i;
-               var match = fileName.toLowerCase().match(re);
-               return match && match.length && match[0];
+           if (storage) {
+             var storageDisabled = storage.replace(/;/g, ',').split(',');
+             storageDisabled.forEach(features.disable);

            }
 
            }
 

+           var hash = utilStringQs(window.location.hash);

 
 

-           function xmlToDom(textdata) {
-               return (new DOMParser()).parseFromString(textdata, 'text/xml');
+           if (hash.disable_features) {
+             var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
+             hashDisabled.forEach(features.disable);

            }
            }

+         }; // warm up the feature matching cache upon merging fetched data

 
 
 
 

-           drawData.setFile = function(extension, data) {
-               _template = null;
-               _fileList = null;
-               _geojson = null;
-               _src = null;
+         context.history().on('merge.features', function (newEntities) {
+           if (!newEntities) return;
+           var handle = window.requestIdleCallback(function () {
+             var graph = context.graph();
+             var types = utilArrayGroupBy(newEntities, 'type'); // ensure that getMatches is called on relations before ways

 
 

-               var gj;
-               switch (extension) {
-                   case '.gpx':
-                       gj = togeojson.gpx(xmlToDom(data));
-                       break;
-                   case '.kml':
-                       gj = togeojson.kml(xmlToDom(data));
-                       break;
-                   case '.geojson':
-                   case '.json':
-                       gj = JSON.parse(data);
-                       break;
-               }
+             var entities = [].concat(types.relation || [], types.way || [], types.node || []);

 
 

-               gj = gj || {};
-               if (Object.keys(gj).length) {
-                   _geojson = ensureIDs(gj);
-                   _src = extension + ' data file';
-                   this.fitZoom();
-               }
+             for (var i = 0; i < entities.length; i++) {
+               var geometry = entities[i].geometry(graph);
+               features.getMatches(entities[i], graph, geometry);
+             }
+           });

 
 

-               dispatch.call('change');
-               return this;
-           };
+           _deferred.add(handle);
+         });
+         return features;
+       }
+
+       /** Error message constants. */
+
+       var FUNC_ERROR_TEXT = 'Expected a function';
+       /**
+        * Creates a throttled function that only invokes `func` at most once per
+        * every `wait` milliseconds. The throttled function comes with a `cancel`
+        * method to cancel delayed `func` invocations and a `flush` method to
+        * immediately invoke them. Provide `options` to indicate whether `func`
+        * should be invoked on the leading and/or trailing edge of the `wait`
+        * timeout. The `func` is invoked with the last arguments provided to the
+        * throttled function. Subsequent calls to the throttled function return the
+        * result of the last `func` invocation.
+        *
+        * **Note:** If `leading` and `trailing` options are `true`, `func` is
+        * invoked on the trailing edge of the timeout only if the throttled function
+        * is invoked more than once during the `wait` timeout.
+        *
+        * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+        * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+        *
+        * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+        * for details over the differences between `_.throttle` and `_.debounce`.
+        *
+        * @static
+        * @memberOf _
+        * @since 0.1.0
+        * @category Function
+        * @param {Function} func The function to throttle.
+        * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
+        * @param {Object} [options={}] The options object.
+        * @param {boolean} [options.leading=true]
+        *  Specify invoking on the leading edge of the timeout.
+        * @param {boolean} [options.trailing=true]
+        *  Specify invoking on the trailing edge of the timeout.
+        * @returns {Function} Returns the new throttled function.
+        * @example
+        *
+        * // Avoid excessively updating the position while scrolling.
+        * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
+        *
+        * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
+        * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
+        * jQuery(element).on('click', throttled);
+        *
+        * // Cancel the trailing throttled invocation.
+        * jQuery(window).on('popstate', throttled.cancel);
+        */

 
 

+       function throttle(func, wait, options) {
+         var leading = true,
+             trailing = true;

 
 

-           drawData.showLabels = function(val) {
-               if (!arguments.length) { return _showLabels; }
+         if (typeof func != 'function') {
+           throw new TypeError(FUNC_ERROR_TEXT);
+         }

 
 

-               _showLabels = val;
-               return this;
-           };
+         if (isObject$2(options)) {
+           leading = 'leading' in options ? !!options.leading : leading;
+           trailing = 'trailing' in options ? !!options.trailing : trailing;
+         }
+
+         return debounce(func, wait, {
+           'leading': leading,
+           'maxWait': wait,
+           'trailing': trailing
+         });
+       }

 
 

+       //
+       // - the activeID - nope
+       // - 1 away (adjacent) to the activeID - yes (vertices will be merged)
+       // - 2 away from the activeID - nope (would create a self intersecting segment)
+       // - all others on a linear way - yes
+       // - all others on a closed way - nope (would create a self intersecting polygon)
+       //
+       // returns
+       // 0 = active vertex - no touch/connect
+       // 1 = passive vertex - yes touch/connect
+       // 2 = adjacent vertex - yes but pay attention segmenting a line here
+       //

 
 

-           drawData.enabled = function(val) {
-               if (!arguments.length) { return _enabled; }
+       function svgPassiveVertex(node, graph, activeID) {
+         if (!activeID) return 1;
+         if (activeID === node.id) return 0;
+         var parents = graph.parentWays(node);
+         var i, j, nodes, isClosed, ix1, ix2, ix3, ix4, max;
+
+         for (i = 0; i < parents.length; i++) {
+           nodes = parents[i].nodes;
+           isClosed = parents[i].isClosed();
+
+           for (j = 0; j < nodes.length; j++) {
+             // find this vertex, look nearby
+             if (nodes[j] === node.id) {
+               ix1 = j - 2;
+               ix2 = j - 1;
+               ix3 = j + 1;
+               ix4 = j + 2;

 
 

-               _enabled = val;
-               if (_enabled) {
-                   showLayer();
-               } else {
-                   hideLayer();
-               }
+               if (isClosed) {
+                 // wraparound if needed
+                 max = nodes.length - 1;
+                 if (ix1 < 0) ix1 = max + ix1;
+                 if (ix2 < 0) ix2 = max + ix2;
+                 if (ix3 > max) ix3 = ix3 - max;
+                 if (ix4 > max) ix4 = ix4 - max;
+               }
+
+               if (nodes[ix1] === activeID) return 0; // no - prevent self intersect
+               else if (nodes[ix2] === activeID) return 2; // ok - adjacent
+                 else if (nodes[ix3] === activeID) return 2; // ok - adjacent
+                   else if (nodes[ix4] === activeID) return 0; // no - prevent self intersect
+                     else if (isClosed && nodes.indexOf(activeID) !== -1) return 0; // no - prevent self intersect
+             }
+           }
+         }

 
 

-               dispatch.call('change');
-               return this;
-           };
+         return 1; // ok
+       }
+       function svgMarkerSegments(projection, graph, dt, shouldReverse, bothDirections) {
+         return function (entity) {
+           var i = 0;
+           var offset = dt;
+           var segments = [];
+           var clip = d3_geoIdentity().clipExtent(projection.clipExtent()).stream;
+           var coordinates = graph.childNodes(entity).map(function (n) {
+             return n.loc;
+           });
+           var a, b;

 
 

+           if (shouldReverse(entity)) {
+             coordinates.reverse();
+           }

 
 

-           drawData.hasData = function() {
-               var gj = _geojson || {};
-               return !!(_template || Object.keys(gj).length);
-           };
+           d3_geoStream({
+             type: 'LineString',
+             coordinates: coordinates
+           }, projection.stream(clip({
+             lineStart: function lineStart() {},
+             lineEnd: function lineEnd() {
+               a = null;
+             },
+             point: function point(x, y) {
+               b = [x, y];

 
 

+               if (a) {
+                 var span = geoVecLength(a, b) - offset;

 
 

-           drawData.template = function(val, src) {
-               if (!arguments.length) { return _template; }
+                 if (span >= 0) {
+                   var heading = geoVecAngle(a, b);
+                   var dx = dt * Math.cos(heading);
+                   var dy = dt * Math.sin(heading);
+                   var p = [a[0] + offset * Math.cos(heading), a[1] + offset * Math.sin(heading)]; // gather coordinates

 
 

-               // test source against OSM imagery blacklists..
-               var osm = context.connection();
-               if (osm) {
-                   var blacklists = osm.imageryBlacklists();
-                   var fail = false;
-                   var tested = 0;
-                   var regex;
+                   var coord = [a, p];

 
 

-                   for (var i = 0; i < blacklists.length; i++) {
-                       try {
-                           regex = new RegExp(blacklists[i]);
-                           fail = regex.test(val);
-                           tested++;
-                           if (fail) { break; }
-                       } catch (e) {
-                           /* noop */
-                       }
+                   for (span -= dt; span >= 0; span -= dt) {
+                     p = geoVecAdd(p, [dx, dy]);
+                     coord.push(p);

                    }
 
                    }
 

-                   // ensure at least one test was run.
-                   if (!tested) {
-                       regex = new RegExp('.*\.google(apis)?\..*/(vt|kh)[\?/].*([xyz]=.*){3}.*');
-                       fail = regex.test(val);
-                   }
-               }
+                   coord.push(b); // generate svg paths

 
 

-               _template = val;
-               _fileList = null;
-               _geojson = null;
+                   var segment = '';
+                   var j;

 
 

-               // strip off the querystring/hash from the template,
-               // it often includes the access token
-               _src = src || ('vectortile:' + val.split(/[?#]/)[0]);
+                   for (j = 0; j < coord.length; j++) {
+                     segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+                   }

 
 

-               dispatch.call('change');
-               return this;
-           };
+                   segments.push({
+                     id: entity.id,
+                     index: i++,
+                     d: segment
+                   });

 
 

+                   if (bothDirections(entity)) {
+                     segment = '';

 
 

-           drawData.geojson = function(gj, src) {
-               if (!arguments.length) { return _geojson; }
+                     for (j = coord.length - 1; j >= 0; j--) {
+                       segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+                     }

 
 

-               _template = null;
-               _fileList = null;
-               _geojson = null;
-               _src = null;
+                     segments.push({
+                       id: entity.id,
+                       index: i++,
+                       d: segment
+                     });
+                   }
+                 }

 
 

-               gj = gj || {};
-               if (Object.keys(gj).length) {
-                   _geojson = ensureIDs(gj);
-                   _src = src || 'unknown.geojson';
+                 offset = -span;

                }
 
                }
 

-               dispatch.call('change');
-               return this;
-           };
+               a = b;
+             }
+           })));
+           return segments;
+         };
+       }
+       function svgPath(projection, graph, isArea) {
+         // Explanation of magic numbers:
+         // "padding" here allows space for strokes to extend beyond the viewport,
+         // so that the stroke isn't drawn along the edge of the viewport when
+         // the shape is clipped.
+         //
+         // When drawing lines, pad viewport by 5px.
+         // When drawing areas, pad viewport by 65px in each direction to allow
+         // for 60px area fill stroke (see ".fill-partial path.fill" css rule)
+         var cache = {};
+         var padding = isArea ? 65 : 5;
+         var viewport = projection.clipExtent();
+         var paddedExtent = [[viewport[0][0] - padding, viewport[0][1] - padding], [viewport[1][0] + padding, viewport[1][1] + padding]];
+         var clip = d3_geoIdentity().clipExtent(paddedExtent).stream;
+         var project = projection.stream;
+         var path = d3_geoPath().projection({
+           stream: function stream(output) {
+             return project(clip(output));
+           }
+         });

 
 

+         var svgpath = function svgpath(entity) {
+           if (entity.id in cache) {
+             return cache[entity.id];
+           } else {
+             return cache[entity.id] = path(entity.asGeoJSON(graph));
+           }
+         };

 
 

-           drawData.fileList = function(fileList) {
-               if (!arguments.length) { return _fileList; }
+         svgpath.geojson = function (d) {
+           if (d.__featurehash__ !== undefined) {
+             if (d.__featurehash__ in cache) {
+               return cache[d.__featurehash__];
+             } else {
+               return cache[d.__featurehash__] = path(d);
+             }
+           } else {
+             return path(d);
+           }
+         };

 
 

-               _template = null;
-               _fileList = fileList;
-               _geojson = null;
-               _src = null;
+         return svgpath;
+       }
+       function svgPointTransform(projection) {
+         var svgpoint = function svgpoint(entity) {
+           // http://jsperf.com/short-array-join
+           var pt = projection(entity.loc);
+           return 'translate(' + pt[0] + ',' + pt[1] + ')';
+         };

 
 

-               if (!fileList || !fileList.length) { return this; }
-               var f = fileList[0];
-               var extension = getExtension(f.name);
-               var reader = new FileReader();
-               reader.onload = (function() {
-                   return function(e) {
-                       drawData.setFile(extension, e.target.result);
-                   };
-               })();
+         svgpoint.geojson = function (d) {
+           return svgpoint(d.properties.entity);
+         };

 
 

-               reader.readAsText(f);
+         return svgpoint;
+       }
+       function svgRelationMemberTags(graph) {
+         return function (entity) {
+           var tags = entity.tags;
+           var shouldCopyMultipolygonTags = !entity.hasInterestingTags();
+           graph.parentRelations(entity).forEach(function (relation) {
+             var type = relation.tags.type;

 
 

-               return this;
-           };
+             if (type === 'multipolygon' && shouldCopyMultipolygonTags || type === 'boundary') {
+               tags = Object.assign({}, relation.tags, tags);
+             }
+           });
+           return tags;
+         };
+       }
+       function svgSegmentWay(way, graph, activeID) {
+         // When there is no activeID, we can memoize this expensive computation
+         if (activeID === undefined) {
+           return graph["transient"](way, 'waySegments', getWaySegments);
+         } else {
+           return getWaySegments();
+         }

 
 

+         function getWaySegments() {
+           var isActiveWay = way.nodes.indexOf(activeID) !== -1;
+           var features = {
+             passive: [],
+             active: []
+           };
+           var start = {};
+           var end = {};
+           var node, type;

 
 

-           drawData.url = function(url, defaultExtension) {
-               _template = null;
-               _fileList = null;
-               _geojson = null;
-               _src = null;
-
-               // strip off any querystring/hash from the url before checking extension
-               var testUrl = url.split(/[?#]/)[0];
-               var extension = getExtension(testUrl) || defaultExtension;
-               if (extension) {
-                   _template = null;
-                   d3_text(url)
-                       .then(function(data) {
-                           drawData.setFile(extension, data);
-                       })
-                       .catch(function() {
-                           /* ignore */
-                       });
+           for (var i = 0; i < way.nodes.length; i++) {
+             node = graph.entity(way.nodes[i]);
+             type = svgPassiveVertex(node, graph, activeID);
+             end = {
+               node: node,
+               type: type
+             };

 
 

+             if (start.type !== undefined) {
+               if (start.node.id === activeID || end.node.id === activeID) ; else if (isActiveWay && (start.type === 2 || end.type === 2)) {
+                 // one adjacent vertex
+                 pushActive(start, end, i);
+               } else if (start.type === 0 && end.type === 0) {
+                 // both active vertices
+                 pushActive(start, end, i);

                } else {
                } else {

-                   drawData.template(url);
+                 pushPassive(start, end, i);

                }
                }

+             }

 
 

-               return this;
-           };
-
-
-           drawData.getSrc = function() {
-               return _src || '';
-           };
-
+             start = end;
+           }

 
 

-           drawData.fitZoom = function() {
-               var features = getFeatures(_geojson);
-               if (!features.length) { return; }
-
-               var map = context.map();
-               var viewport = map.trimmedExtent().polygon();
-               var coords = features.reduce(function(coords, feature) {
-                   var geom = feature.geometry;
-                   if (!geom) { return coords; }
-
-                   var c = geom.coordinates;
-
-                   /* eslint-disable no-fallthrough */
-                   switch (geom.type) {
-                       case 'Point':
-                           c = [c];
-                       case 'MultiPoint':
-                       case 'LineString':
-                           break;
-
-                       case 'MultiPolygon':
-                           c = utilArrayFlatten(c);
-                       case 'Polygon':
-                       case 'MultiLineString':
-                           c = utilArrayFlatten(c);
-                           break;
-                   }
-                   /* eslint-enable no-fallthrough */
+           return features;

 
 

-                   return utilArrayUnion(coords, c);
-               }, []);
+           function pushActive(start, end, index) {
+             features.active.push({
+               type: 'Feature',
+               id: way.id + '-' + index + '-nope',
+               properties: {
+                 nope: true,
+                 target: true,
+                 entity: way,
+                 nodes: [start.node, end.node],
+                 index: index
+               },
+               geometry: {
+                 type: 'LineString',
+                 coordinates: [start.node.loc, end.node.loc]
+               }
+             });
+           }

 
 

-               if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
-                   var extent = geoExtent(d3_geoBounds({ type: 'LineString', coordinates: coords }));
-                   map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
+           function pushPassive(start, end, index) {
+             features.passive.push({
+               type: 'Feature',
+               id: way.id + '-' + index,
+               properties: {
+                 target: true,
+                 entity: way,
+                 nodes: [start.node, end.node],
+                 index: index
+               },
+               geometry: {
+                 type: 'LineString',
+                 coordinates: [start.node.loc, end.node.loc]

                }
                }

+             });
+           }
+         }
+       }

 
 

-               return this;
-           };
+       function svgTagClasses() {
+         var primaries = ['building', 'highway', 'railway', 'waterway', 'aeroway', 'aerialway', 'piste:type', 'boundary', 'power', 'amenity', 'natural', 'landuse', 'leisure', 'military', 'place', 'man_made', 'route', 'attraction', 'building:part', 'indoor'];
+         var statuses = [// nonexistent, might be built
+         'proposed', 'planned', // under maintentance or between groundbreaking and opening
+         'construction', // existent but not functional
+         'disused', // dilapidated to nonexistent
+         'abandoned', // nonexistent, still may appear in imagery
+         'dismantled', 'razed', 'demolished', 'obliterated', // existent occasionally, e.g. stormwater drainage basin
+         'intermittent'];
+         var secondaries = ['oneway', 'bridge', 'tunnel', 'embankment', 'cutting', 'barrier', 'surface', 'tracktype', 'footway', 'crossing', 'service', 'sport', 'public_transport', 'location', 'parking', 'golf', 'type', 'leisure', 'man_made', 'indoor'];
+
+         var _tags = function _tags(entity) {
+           return entity.tags;
+         };
+
+         var tagClasses = function tagClasses(selection) {
+           selection.each(function tagClassesEach(entity) {
+             var value = this.className;
+
+             if (value.baseVal !== undefined) {
+               value = value.baseVal;
+             }

 
 

+             var t = _tags(entity);

 
 

-           init();
-           return drawData;
-       }
+             var computed = tagClasses.getClassesString(t, value);

 
 

-       function svgDebug(projection, context) {
+             if (computed !== value) {
+               select(this).attr('class', computed);
+             }
+           });
+         };

 
 

-         function drawDebug(selection) {
-           var showTile = context.getDebug('tile');
-           var showCollision = context.getDebug('collision');
-           var showImagery = context.getDebug('imagery');
-           var showTouchTargets = context.getDebug('target');
-           var showDownloaded = context.getDebug('downloaded');
+         tagClasses.getClassesString = function (t, value) {
+           var primary, status;
+           var i, j, k, v; // in some situations we want to render perimeter strokes a certain way

 
 

-           var debugData = [];
-           if (showTile) {
-             debugData.push({ class: 'red', label: 'tile' });
-           }
-           if (showCollision) {
-             debugData.push({ class: 'yellow', label: 'collision' });
-           }
-           if (showImagery) {
-             debugData.push({ class: 'orange', label: 'imagery' });
-           }
-           if (showTouchTargets) {
-             debugData.push({ class: 'pink', label: 'touchTargets' });
-           }
-           if (showDownloaded) {
-             debugData.push({ class: 'purple', label: 'downloaded' });
-           }
+           var overrideGeometry;

 
 

+           if (/\bstroke\b/.test(value)) {
+             if (!!t.barrier && t.barrier !== 'no') {
+               overrideGeometry = 'line';
+             }
+           } // preserve base classes (nothing with `tag-`)
+
+
+           var classes = value.trim().split(/\s+/).filter(function (klass) {
+             return klass.length && !/^tag-/.test(klass);
+           }).map(function (klass) {
+             // special overrides for some perimeter strokes
+             return klass === 'line' || klass === 'area' ? overrideGeometry || klass : klass;
+           }); // pick at most one primary classification tag..
+
+           for (i = 0; i < primaries.length; i++) {
+             k = primaries[i];
+             v = t[k];
+             if (!v || v === 'no') continue;
+
+             if (k === 'piste:type') {
+               // avoid a ':' in the class name
+               k = 'piste';
+             } else if (k === 'building:part') {
+               // avoid a ':' in the class name
+               k = 'building_part';
+             }

 
 

-           var legend = context.container().select('.main-content')
-             .selectAll('.debug-legend')
-             .data(debugData.length ? [0] : []);
+             primary = k;

 
 

-           legend.exit()
-             .remove();
+             if (statuses.indexOf(v) !== -1) {
+               // e.g. `railway=abandoned`
+               status = v;
+               classes.push('tag-' + k);
+             } else {
+               classes.push('tag-' + k);
+               classes.push('tag-' + k + '-' + v);
+             }

 
 

-           legend = legend.enter()
-             .append('div')
-             .attr('class', 'fillD debug-legend')
-             .merge(legend);
+             break;
+           }

 
 

+           if (!primary) {
+             for (i = 0; i < statuses.length; i++) {
+               for (j = 0; j < primaries.length; j++) {
+                 k = statuses[i] + ':' + primaries[j]; // e.g. `demolished:building=yes`

 
 

-           var legendItems = legend.selectAll('.debug-legend-item')
-             .data(debugData, function (d) { return d.label; });
+                 v = t[k];
+                 if (!v || v === 'no') continue;
+                 status = statuses[i];
+                 break;
+               }
+             }
+           } // add at most one status tag, only if relates to primary tag..
+
+
+           if (!status) {
+             for (i = 0; i < statuses.length; i++) {
+               k = statuses[i];
+               v = t[k];
+               if (!v || v === 'no') continue;
+
+               if (v === 'yes') {
+                 // e.g. `railway=rail + abandoned=yes`
+                 status = k;
+               } else if (primary && primary === v) {
+                 // e.g. `railway=rail + abandoned=railway`
+                 status = k;
+               } else if (!primary && primaries.indexOf(v) !== -1) {
+                 // e.g. `abandoned=railway`
+                 status = k;
+                 primary = v;
+                 classes.push('tag-' + v);
+               } // else ignore e.g.  `highway=path + abandoned=railway`
+
+
+               if (status) break;
+             }
+           }

 
 

-           legendItems.exit()
-             .remove();
+           if (status) {
+             classes.push('tag-status');
+             classes.push('tag-status-' + status);
+           } // add any secondary tags

 
 

-           legendItems.enter()
-             .append('span')
-             .attr('class', function (d) { return ("debug-legend-item " + (d.class)); })
-             .text(function (d) { return d.label; });

 
 

+           for (i = 0; i < secondaries.length; i++) {
+             k = secondaries[i];
+             v = t[k];
+             if (!v || v === 'no' || k === primary) continue;
+             classes.push('tag-' + k);
+             classes.push('tag-' + k + '-' + v);
+           } // For highways, look for surface tagging..

 
 

-           var layer = selection.selectAll('.layer-debug')
-             .data(showImagery || showDownloaded ? [0] : []);

 
 

-           layer.exit()
-             .remove();
+           if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
+             var surface = t.highway === 'track' ? 'unpaved' : 'paved';

 
 

-           layer = layer.enter()
-             .append('g')
-             .attr('class', 'layer-debug')
-             .merge(layer);
+             for (k in t) {
+               v = t[k];

 
 

+               if (k in osmPavedTags) {
+                 surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
+               }

 
 

-           // imagery
-           var extent = context.map().extent();
-           _mainFileFetcher.get('imagery')
-             .then(function (d) {
-               var hits = (showImagery && d.query.bbox(extent.rectangle(), true)) || [];
-               var features = hits.map(function (d) { return d.features[d.id]; });
+               if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
+                 surface = 'semipaved';
+               }
+             }

 
 

-               var imagery = layer.selectAll('path.debug-imagery')
-                 .data(features);
+             classes.push('tag-' + surface);
+           } // If this is a wikidata-tagged item, add a class for that..

 
 

-               imagery.exit()
-                 .remove();

 
 

-               imagery.enter()
-                 .append('path')
-                 .attr('class', 'debug-imagery debug orange');
-             })
-             .catch(function () { /* ignore */ });
+           var qid = t.wikidata || t['flag:wikidata'] || t['brand:wikidata'] || t['network:wikidata'] || t['operator:wikidata'];

 
 

-           // downloaded
-           var osm = context.connection();
-           var dataDownloaded = [];
-           if (osm && showDownloaded) {
-             var rtree = osm.caches('get').tile.rtree;
-             dataDownloaded = rtree.all().map(function (bbox) {
-               return {
-                 type: 'Feature',
-                 properties: { id: bbox.id },
-                 geometry: {
-                   type: 'Polygon',
-                   coordinates: [[
-                     [ bbox.minX, bbox.minY ],
-                     [ bbox.minX, bbox.maxY ],
-                     [ bbox.maxX, bbox.maxY ],
-                     [ bbox.maxX, bbox.minY ],
-                     [ bbox.minX, bbox.minY ]
-                   ]]
-                 }
-               };
-             });
+           if (qid) {
+             classes.push('tag-wikidata');

            }
 
            }
 

-           var downloaded = layer
-             .selectAll('path.debug-downloaded')
-             .data(showDownloaded ? dataDownloaded : []);
+           return classes.join(' ').trim();
+         };

 
 

-           downloaded.exit()
-             .remove();
+         tagClasses.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val;
+           return tagClasses;
+         };

 
 

-           downloaded.enter()
-             .append('path')
-             .attr('class', 'debug-downloaded debug purple');
+         return tagClasses;
+       }

 
 

-           // update
-           layer.selectAll('path')
-             .attr('d', svgPath(projection).geojson);
+       // Patterns only work in Firefox when set directly on element.
+       // (This is not a bug: https://bugzilla.mozilla.org/show_bug.cgi?id=750632)
+       var patterns = {
+         // tag - pattern name
+         // -or-
+         // tag - value - pattern name
+         // -or-
+         // tag - value - rules (optional tag-values, pattern name)
+         // (matches earlier rules first, so fallback should be last entry)
+         amenity: {
+           grave_yard: 'cemetery',
+           fountain: 'water_standing'
+         },
+         landuse: {
+           cemetery: [{
+             religion: 'christian',
+             pattern: 'cemetery_christian'
+           }, {
+             religion: 'buddhist',
+             pattern: 'cemetery_buddhist'
+           }, {
+             religion: 'muslim',
+             pattern: 'cemetery_muslim'
+           }, {
+             religion: 'jewish',
+             pattern: 'cemetery_jewish'
+           }, {
+             pattern: 'cemetery'
+           }],
+           construction: 'construction',
+           farmland: 'farmland',
+           farmyard: 'farmyard',
+           forest: [{
+             leaf_type: 'broadleaved',
+             pattern: 'forest_broadleaved'
+           }, {
+             leaf_type: 'needleleaved',
+             pattern: 'forest_needleleaved'
+           }, {
+             leaf_type: 'leafless',
+             pattern: 'forest_leafless'
+           }, {
+             pattern: 'forest'
+           } // same as 'leaf_type:mixed'
+           ],
+           grave_yard: 'cemetery',
+           grass: [{
+             golf: 'green',
+             pattern: 'golf_green'
+           }, {
+             pattern: 'grass'
+           }],
+           landfill: 'landfill',
+           meadow: 'meadow',
+           military: 'construction',
+           orchard: 'orchard',
+           quarry: 'quarry',
+           vineyard: 'vineyard'
+         },
+         natural: {
+           beach: 'beach',
+           grassland: 'grass',
+           sand: 'beach',
+           scrub: 'scrub',
+           water: [{
+             water: 'pond',
+             pattern: 'pond'
+           }, {
+             water: 'reservoir',
+             pattern: 'water_standing'
+           }, {
+             pattern: 'waves'
+           }],
+           wetland: [{
+             wetland: 'marsh',
+             pattern: 'wetland_marsh'
+           }, {
+             wetland: 'swamp',
+             pattern: 'wetland_swamp'
+           }, {
+             wetland: 'bog',
+             pattern: 'wetland_bog'
+           }, {
+             wetland: 'reedbed',
+             pattern: 'wetland_reedbed'
+           }, {
+             pattern: 'wetland'
+           }],
+           wood: [{
+             leaf_type: 'broadleaved',
+             pattern: 'forest_broadleaved'
+           }, {
+             leaf_type: 'needleleaved',
+             pattern: 'forest_needleleaved'
+           }, {
+             leaf_type: 'leafless',
+             pattern: 'forest_leafless'
+           }, {
+             pattern: 'forest'
+           } // same as 'leaf_type:mixed'
+           ]
+         },
+         traffic_calming: {
+           island: [{
+             surface: 'grass',
+             pattern: 'grass'
+           }],
+           chicane: [{
+             surface: 'grass',
+             pattern: 'grass'
+           }],
+           choker: [{
+             surface: 'grass',
+             pattern: 'grass'
+           }]
+         }
+       };
+       function svgTagPattern(tags) {
+         // Skip pattern filling if this is a building (buildings don't get patterns applied)
+         if (tags.building && tags.building !== 'no') {
+           return null;

          }
 
          }
 

+         for (var tag in patterns) {
+           var entityValue = tags[tag];
+           if (!entityValue) continue;

 
 

-         // This looks strange because `enabled` methods on other layers are
-         // chainable getter/setters, and this one is just a getter.
-         drawDebug.enabled = function() {
-           if (!arguments.length) {
-             return context.getDebug('tile') ||
-               context.getDebug('collision') ||
-               context.getDebug('imagery') ||
-               context.getDebug('target') ||
-               context.getDebug('downloaded');
+           if (typeof patterns[tag] === 'string') {
+             // extra short syntax (just tag) - pattern name
+             return 'pattern-' + patterns[tag];

            } else {
            } else {

-               return this;
-           }
-         };
-
+             var values = patterns[tag];

 
 

-         return drawDebug;
-       }
-
-       var _layerEnabled = false;
-       var _qaService;
+             for (var value in values) {
+               if (entityValue !== value) continue;
+               var rules = values[value];

 
 

-       function svgKeepRight(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-         var minZoom = 12;
+               if (typeof rules === 'string') {
+                 // short syntax - pattern name
+                 return 'pattern-' + rules;
+               } // long syntax - rule array

 
 

-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var layerVisible = false;

 
 

-         function markerPath(selection, klass) {
-           selection
-             .attr('class', klass)
-             .attr('transform', 'translate(-4, -24)')
-             .attr('d', 'M11.6,6.2H7.1l1.4-5.1C8.6,0.6,8.1,0,7.5,0H2.2C1.7,0,1.3,0.3,1.3,0.8L0,10.2c-0.1,0.6,0.4,1.1,0.9,1.1h4.6l-1.8,7.6C3.6,19.4,4.1,20,4.7,20c0.3,0,0.6-0.2,0.8-0.5l6.9-11.9C12.7,7,12.3,6.2,11.6,6.2z');
-         }
+               for (var ruleKey in rules) {
+                 var rule = rules[ruleKey];
+                 var pass = true;

 
 

-         // Loosely-coupled keepRight service for fetching issues.
-         function getService() {
-           if (services.keepRight && !_qaService) {
-             _qaService = services.keepRight;
-             _qaService.on('loaded', throttledRedraw);
-           } else if (!services.keepRight && _qaService) {
-             _qaService = null;
-           }
+                 for (var criterion in rule) {
+                   if (criterion !== 'pattern') {
+                     // reserved for pattern name
+                     // The only rule is a required tag-value pair
+                     var v = tags[criterion];

 
 

-           return _qaService;
-         }
+                     if (!v || v !== rule[criterion]) {
+                       pass = false;
+                       break;
+                     }
+                   }
+                 }

 
 

-         // Show the markers
-         function editOn() {
-           if (!layerVisible) {
-             layerVisible = true;
-             drawLayer
-               .style('display', 'block');
+                 if (pass) {
+                   return 'pattern-' + rule.pattern;
+                 }
+               }
+             }

            }
          }
 
            }
          }
 

-         // Immediately remove the markers and their touch targets
-         function editOff() {
-           if (layerVisible) {
-             layerVisible = false;
-             drawLayer
-               .style('display', 'none');
-             drawLayer.selectAll('.qaItem.keepRight')
-               .remove();
-             touchLayer.selectAll('.qaItem.keepRight')
-               .remove();
-           }
-         }
+         return null;
+       }

 
 

-         // Enable the layer.  This shows the markers and transitions them to visible.
-         function layerOn() {
-           editOn();
+       function svgAreas(projection, context) {
+         function getPatternStyle(tags) {
+           var imageID = svgTagPattern(tags);

 
 

-           drawLayer
-             .style('opacity', 0)
-             .transition()
-             .duration(250)
-             .style('opacity', 1)
-             .on('end interrupt', function () { return dispatch.call('change'); });
-         }
+           if (imageID) {
+             return 'url("#ideditor-' + imageID + '")';
+           }

 
 

-         // Disable the layer.  This transitions the layer invisible and then hides the markers.
-         function layerOff() {
-           throttledRedraw.cancel();
-           drawLayer.interrupt();
-           touchLayer.selectAll('.qaItem.keepRight')
-             .remove();
-
-           drawLayer
-             .transition()
-             .duration(250)
-             .style('opacity', 0)
-             .on('end interrupt', function () {
-               editOff();
-               dispatch.call('change');
-             });
+           return '';

          }
 
          }
 

-         // Update the issue markers
-         function updateMarkers() {
-           if (!layerVisible || !_layerEnabled) { return; }
-
-           var service = getService();
-           var selectedID = context.selectedErrorID();
-           var data = (service ? service.getItems(projection) : []);
-           var getTransform = svgPointTransform(projection);
+         function drawTargets(selection, graph, entities, filter) {
+           var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+           var getPath = svgPath(projection).geojson;
+           var activeID = context.activeID();
+           var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways

 
 

-           // Draw markers..
-           var markers = drawLayer.selectAll('.qaItem.keepRight')
-             .data(data, function (d) { return d.id; });
+           var data = {
+             targets: [],
+             nopes: []
+           };
+           entities.forEach(function (way) {
+             var features = svgSegmentWay(way, graph, activeID);
+             data.targets.push.apply(data.targets, features.passive);
+             data.nopes.push.apply(data.nopes, features.active);
+           }); // Targets allow hover and vertex snapping

 
 

-           // exit
-           markers.exit()
-             .remove();
+           var targetData = data.targets.filter(getPath);
+           var targets = selection.selectAll('.area.target-allowed').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(targetData, function key(d) {
+             return d.id;
+           }); // exit

 
 

-           // enter
-           var markersEnter = markers.enter()
-             .append('g')
-               .attr('class', function (d) { return ("qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.parentIssueType)); });
-
-           markersEnter
-             .append('ellipse')
-               .attr('cx', 0.5)
-               .attr('cy', 1)
-               .attr('rx', 6.5)
-               .attr('ry', 3)
-               .attr('class', 'stroke');
-
-           markersEnter
-             .append('path')
-               .call(markerPath, 'shadow');
-
-           markersEnter
-             .append('use')
-               .attr('class', 'qaItem-fill')
-               .attr('width', '20px')
-               .attr('height', '20px')
-               .attr('x', '-8px')
-               .attr('y', '-22px')
-               .attr('xlink:href', '#iD-icon-bolt');
+           targets.exit().remove();

 
 

-           // update
-           markers
-             .merge(markersEnter)
-             .sort(sortY)
-               .classed('selected', function (d) { return d.id === selectedID; })
-               .attr('transform', getTransform);
+           var segmentWasEdited = function segmentWasEdited(d) {
+             var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes

 
 

+             if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+               return false;
+             }

 
 

-           // Draw targets..
-           if (touchLayer.empty()) { return; }
-           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+             return d.properties.nodes.some(function (n) {
+               return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
+             });
+           }; // enter/update

 
 

-           var targets = touchLayer.selectAll('.qaItem.keepRight')
-             .data(data, function (d) { return d.id; });

 
 

-           // exit
-           targets.exit()
-             .remove();
+           targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
+             return 'way area target target-allowed ' + targetClass + d.id;
+           }).classed('segment-edited', segmentWasEdited); // NOPE

 
 

-           // enter/update
-           targets.enter()
-             .append('rect')
-               .attr('width', '20px')
-               .attr('height', '20px')
-               .attr('x', '-8px')
-               .attr('y', '-22px')
-             .merge(targets)
-             .sort(sortY)
-               .attr('class', function (d) { return ("qaItem " + (d.service) + " target " + fillClass + " itemId-" + (d.id)); })
-               .attr('transform', getTransform);
+           var nopeData = data.nopes.filter(getPath);
+           var nopes = selection.selectAll('.area.target-nope').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(nopeData, function key(d) {
+             return d.id;
+           }); // exit

 
 

+           nopes.exit().remove(); // enter/update

 
 

-           function sortY(a, b) {
-             return (a.id === selectedID) ? 1
-               : (b.id === selectedID) ? -1
-               : (a.severity === 'error' && b.severity !== 'error') ? 1
-               : (b.severity === 'error' && a.severity !== 'error') ? -1
-               : b.loc[1] - a.loc[1];
-           }
+           nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
+             return 'way area target target-nope ' + nopeClass + d.id;
+           }).classed('segment-edited', segmentWasEdited);

          }
 
          }
 

-         // Draw the keepRight layer and schedule loading issues and updating markers.
-         function drawKeepRight(selection) {
-           var service = getService();
-
-           var surface = context.surface();
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-           }
-
-           drawLayer = selection.selectAll('.layer-keepRight')
-             .data(service ? [0] : []);
+         function drawAreas(selection, graph, entities, filter) {
+           var path = svgPath(projection, graph, true);
+           var areas = {};
+           var multipolygon;
+           var base = context.history().base();

 
 

-           drawLayer.exit()
-             .remove();
-
-           drawLayer = drawLayer.enter()
-             .append('g')
-               .attr('class', 'layer-keepRight')
-               .style('display', _layerEnabled ? 'block' : 'none')
-             .merge(drawLayer);
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             if (entity.geometry(graph) !== 'area') continue;
+             multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);

 
 

-           if (_layerEnabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadIssues(projection);
-               updateMarkers();
-             } else {
-               editOff();
+             if (multipolygon) {
+               areas[multipolygon.id] = {
+                 entity: multipolygon.mergeTags(entity.tags),
+                 area: Math.abs(entity.area(graph))
+               };
+             } else if (!areas[entity.id]) {
+               areas[entity.id] = {
+                 entity: entity,
+                 area: Math.abs(entity.area(graph))
+               };

              }
            }
              }
            }

-         }

 
 

-         // Toggles the layer on and off
-         drawKeepRight.enabled = function(val) {
-           if (!arguments.length) { return _layerEnabled; }
-
-           _layerEnabled = val;
-           if (_layerEnabled) {
-             layerOn();
-           } else {
-             layerOff();
-             if (context.selectedErrorID()) {
-               context.enter(modeBrowse(context));
+           var fills = Object.values(areas).filter(function hasPath(a) {
+             return path(a.entity);
+           });
+           fills.sort(function areaSort(a, b) {
+             return b.area - a.area;
+           });
+           fills = fills.map(function (a) {
+             return a.entity;
+           });
+           var strokes = fills.filter(function (area) {
+             return area.type === 'way';
+           });
+           var data = {
+             clip: fills,
+             shadow: strokes,
+             stroke: strokes,
+             fill: fills
+           };
+           var clipPaths = context.surface().selectAll('defs').selectAll('.clipPath-osm').filter(filter).data(data.clip, osmEntity.key);
+           clipPaths.exit().remove();
+           var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-osm').attr('id', function (entity) {
+             return 'ideditor-' + entity.id + '-clippath';
+           });
+           clipPathsEnter.append('path');
+           clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', path);
+           var drawLayer = selection.selectAll('.layer-osm.areas');
+           var touchLayer = selection.selectAll('.layer-touch.areas'); // Draw areas..
+
+           var areagroup = drawLayer.selectAll('g.areagroup').data(['fill', 'shadow', 'stroke']);
+           areagroup = areagroup.enter().append('g').attr('class', function (d) {
+             return 'areagroup area-' + d;
+           }).merge(areagroup);
+           var paths = areagroup.selectAll('path').filter(filter).data(function (layer) {
+             return data[layer];
+           }, osmEntity.key);
+           paths.exit().remove();
+           var fillpaths = selection.selectAll('.area-fill path.area').nodes();
+           var bisect = d3_bisector(function (node) {
+             return -node.__data__.area(graph);
+           }).left;
+
+           function sortedByArea(entity) {
+             if (this._parent.__data__ === 'fill') {
+               return fillpaths[bisect(fillpaths, -entity.area(graph))];

              }
            }
 
              }
            }
 

-           dispatch.call('change');
-           return this;
-         };
+           paths = paths.enter().insert('path', sortedByArea).merge(paths).each(function (entity) {
+             var layer = this.parentNode.__data__;
+             this.setAttribute('class', entity.type + ' area ' + layer + ' ' + entity.id);

 
 

-         drawKeepRight.supported = function () { return !!getService(); };
+             if (layer === 'fill') {
+               this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
+               this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
+             }
+           }).classed('added', function (d) {
+             return !base.entities[d.id];
+           }).classed('geometry-edited', function (d) {
+             return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
+           }).classed('retagged', function (d) {
+             return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+           }).call(svgTagClasses()).attr('d', path); // Draw touch targets..

 
 

-         return drawKeepRight;
+           touchLayer.call(drawTargets, graph, data.stroke, filter);
+         }
+
+         return drawAreas;

        }
 
        }
 

-       function svgGeolocate(projection) {
-           var layer = select(null);
-           var _position;
+       var fastJsonStableStringify = function fastJsonStableStringify(data, opts) {
+         if (!opts) opts = {};
+         if (typeof opts === 'function') opts = {
+           cmp: opts
+         };
+         var cycles = typeof opts.cycles === 'boolean' ? opts.cycles : false;

 
 

+         var cmp = opts.cmp && function (f) {
+           return function (node) {
+             return function (a, b) {
+               var aobj = {
+                 key: a,
+                 value: node[a]
+               };
+               var bobj = {
+                 key: b,
+                 value: node[b]
+               };
+               return f(aobj, bobj);
+             };
+           };
+         }(opts.cmp);

 
 

-           function init() {
-               if (svgGeolocate.initialized) { return; }  // run once
-               svgGeolocate.enabled = false;
-               svgGeolocate.initialized = true;
+         var seen = [];
+         return function stringify(node) {
+           if (node && node.toJSON && typeof node.toJSON === 'function') {
+             node = node.toJSON();

            }
 
            }
 

-           function showLayer() {
-               layer.style('display', 'block');
-           }
+           if (node === undefined) return;
+           if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
+           if (_typeof(node) !== 'object') return JSON.stringify(node);
+           var i, out;
+
+           if (Array.isArray(node)) {
+             out = '[';

 
 

+             for (i = 0; i < node.length; i++) {
+               if (i) out += ',';
+               out += stringify(node[i]) || 'null';
+             }

 
 

-           function hideLayer() {
-               layer
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 0);
+             return out + ']';

            }
 
            }
 

-           function layerOn() {
-               layer
-                   .style('opacity', 0)
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 1);
+           if (node === null) return 'null';

 
 

+           if (seen.indexOf(node) !== -1) {
+             if (cycles) return JSON.stringify('__cycle__');
+             throw new TypeError('Converting circular structure to JSON');

            }
 
            }
 

-           function layerOff() {
-               layer.style('display', 'none');
-           }
+           var seenIndex = seen.push(node) - 1;
+           var keys = Object.keys(node).sort(cmp && cmp(node));
+           out = '';

 
 

-           function transform(d) {
-               return svgPointTransform(projection)(d);
+           for (i = 0; i < keys.length; i++) {
+             var key = keys[i];
+             var value = stringify(node[key]);
+             if (!value) continue;
+             if (out) out += ',';
+             out += JSON.stringify(key) + ':' + value;

            }
 
            }
 

-           function accuracy(accuracy, loc) { // converts accuracy to pixels...
-               var degreesRadius = geoMetersToLat(accuracy),
-                   tangentLoc = [loc[0], loc[1] + degreesRadius],
-                   projectedTangent = projection(tangentLoc),
-                   projectedLoc = projection([loc[0], loc[1]]);
+           seen.splice(seenIndex, 1);
+           return '{' + out + '}';
+         }(data);
+       };

 
 

-               // southern most point will have higher pixel value...
-              return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
-           }
+       var $$2 = _export;
+       var $entries = objectToArray.entries;

 
 

-           function update() {
-               var geolocation = { loc: [_position.coords.longitude, _position.coords.latitude] };
+       // `Object.entries` method
+       // https://tc39.es/ecma262/#sec-object.entries
+       $$2({ target: 'Object', stat: true }, {
+         entries: function entries(O) {
+           return $entries(O);
+         }
+       });
+
+       var _marked = /*#__PURE__*/regeneratorRuntime.mark(gpxGen),
+           _marked3 = /*#__PURE__*/regeneratorRuntime.mark(kmlGen);
+
+       // cast array x into numbers
+       // get the content of a text node, if any
+       function nodeVal(x) {
+         if (x && x.normalize) {
+           x.normalize();
+         }

 
 

-               var groups = layer.selectAll('.geolocations').selectAll('.geolocation')
-                   .data([geolocation]);
+         return x && x.textContent || "";
+       } // one Y child of X, if any, otherwise null

 
 

-               groups.exit()
-                   .remove();

 
 

-               var pointsEnter = groups.enter()
-                   .append('g')
-                   .attr('class', 'geolocation');
+       function get1(x, y) {
+         var n = x.getElementsByTagName(y);
+         return n.length ? n[0] : null;
+       }

 
 

-               pointsEnter
-                   .append('circle')
-                   .attr('class', 'geolocate-radius')
-                   .attr('dx', '0')
-                   .attr('dy', '0')
-                   .attr('fill', 'rgb(15,128,225)')
-                   .attr('fill-opacity', '0.3')
-                   .attr('r', '0');
+       function getLineStyle(extensions) {
+         var style = {};

 
 

-               pointsEnter
-                   .append('circle')
-                   .attr('dx', '0')
-                   .attr('dy', '0')
-                   .attr('fill', 'rgb(15,128,225)')
-                   .attr('stroke', 'white')
-                   .attr('stroke-width', '1.5')
-                   .attr('r', '6');
+         if (extensions) {
+           var lineStyle = get1(extensions, "line");

 
 

-               groups.merge(pointsEnter)
-                   .attr('transform', transform);
+           if (lineStyle) {
+             var color = nodeVal(get1(lineStyle, "color")),
+                 opacity = parseFloat(nodeVal(get1(lineStyle, "opacity"))),
+                 width = parseFloat(nodeVal(get1(lineStyle, "width")));
+             if (color) style.stroke = color;
+             if (!isNaN(opacity)) style["stroke-opacity"] = opacity; // GPX width is in mm, convert to px with 96 px per inch

 
 

-               layer.select('.geolocate-radius').attr('r', accuracy(_position.coords.accuracy, geolocation.loc));
+             if (!isNaN(width)) style["stroke-width"] = width * 96 / 25.4;

            }
            }

+         }
+
+         return style;
+       } // get the contents of multiple text nodes, if present

 
 

-           function drawLocation(selection) {
-               var enabled = svgGeolocate.enabled;

 
 

-               layer = selection.selectAll('.layer-geolocate')
-                   .data([0]);
+       function getMulti(x, ys) {
+         var o = {};
+         var n;
+         var k;

 
 

-               layer.exit()
-                   .remove();
+         for (k = 0; k < ys.length; k++) {
+           n = get1(x, ys[k]);
+           if (n) o[ys[k]] = nodeVal(n);
+         }

 
 

-               var layerEnter = layer.enter()
-                   .append('g')
-                   .attr('class', 'layer-geolocate')
-                   .style('display', enabled ? 'block' : 'none');
+         return o;
+       }

 
 

-               layerEnter
-                   .append('g')
-                   .attr('class', 'geolocations');
+       function getProperties$1(node) {
+         var prop = getMulti(node, ["name", "cmt", "desc", "type", "time", "keywords"]); // Parse additional data from our Garmin extension(s)

 
 

-               layer = layerEnter
-                   .merge(layer);
+         var extensions = node.getElementsByTagNameNS("http://www.garmin.com/xmlschemas/GpxExtensions/v3", "*");

 
 

-               if (enabled) {
-                   update();
-               } else {
-                   layerOff();
-               }
+         for (var i = 0; i < extensions.length; i++) {
+           var extension = extensions[i]; // Ignore nested extensions, like those on routepoints or trackpoints
+
+           if (extension.parentNode.parentNode === node) {
+             prop[extension.tagName.replace(":", "_")] = nodeVal(extension);

            }
            }

+         }

 
 

-           drawLocation.enabled = function (position, enabled) {
-               if (!arguments.length) { return svgGeolocate.enabled; }
-               _position = position;
-               svgGeolocate.enabled = enabled;
-               if (svgGeolocate.enabled) {
-                   showLayer();
-                   layerOn();
-               } else {
-                   hideLayer();
-               }
-               return this;
-           };
+         var links = node.getElementsByTagName("link");
+         if (links.length) prop.links = [];

 
 

-           init();
-           return drawLocation;
-       }
+         for (var _i = 0; _i < links.length; _i++) {
+           prop.links.push(Object.assign({
+             href: links[_i].getAttribute("href")
+           }, getMulti(links[_i], ["text", "type"])));
+         }

 
 

-       function svgLabels(projection, context) {
-           var path = d3_geoPath(projection);
-           var detected = utilDetect();
-           var baselineHack = (detected.ie ||
-               detected.browser.toLowerCase() === 'edge' ||
-               (detected.browser.toLowerCase() === 'firefox' && detected.version >= 70));
-           var _rdrawn = new RBush();
-           var _rskipped = new RBush();
-           var _textWidthCache = {};
-           var _entitybboxes = {};
-
-           // Listed from highest to lowest priority
-           var labelStack = [
-               ['line', 'aeroway', '*', 12],
-               ['line', 'highway', 'motorway', 12],
-               ['line', 'highway', 'trunk', 12],
-               ['line', 'highway', 'primary', 12],
-               ['line', 'highway', 'secondary', 12],
-               ['line', 'highway', 'tertiary', 12],
-               ['line', 'highway', '*', 12],
-               ['line', 'railway', '*', 12],
-               ['line', 'waterway', '*', 12],
-               ['area', 'aeroway', '*', 12],
-               ['area', 'amenity', '*', 12],
-               ['area', 'building', '*', 12],
-               ['area', 'historic', '*', 12],
-               ['area', 'leisure', '*', 12],
-               ['area', 'man_made', '*', 12],
-               ['area', 'natural', '*', 12],
-               ['area', 'shop', '*', 12],
-               ['area', 'tourism', '*', 12],
-               ['area', 'camp_site', '*', 12],
-               ['point', 'aeroway', '*', 10],
-               ['point', 'amenity', '*', 10],
-               ['point', 'building', '*', 10],
-               ['point', 'historic', '*', 10],
-               ['point', 'leisure', '*', 10],
-               ['point', 'man_made', '*', 10],
-               ['point', 'natural', '*', 10],
-               ['point', 'shop', '*', 10],
-               ['point', 'tourism', '*', 10],
-               ['point', 'camp_site', '*', 10],
-               ['line', 'name', '*', 12],
-               ['area', 'name', '*', 12],
-               ['point', 'name', '*', 10]
-           ];
+         return prop;
+       }

 
 

+       function coordPair$1(x) {
+         var ll = [parseFloat(x.getAttribute("lon")), parseFloat(x.getAttribute("lat"))];
+         var ele = get1(x, "ele"); // handle namespaced attribute in browser

 
 

-           function shouldSkipIcon(preset) {
-               var noIcons = ['building', 'landuse', 'natural'];
-               return noIcons.some(function(s) {
-                   return preset.id.indexOf(s) >= 0;
-               });
-           }
+         var heart = get1(x, "gpxtpx:hr") || get1(x, "hr");
+         var time = get1(x, "time");
+         var e;

 
 

+         if (ele) {
+           e = parseFloat(nodeVal(ele));

 
 

-           function get(array, prop) {
-               return function(d, i) { return array[i][prop]; };
+           if (!isNaN(e)) {
+             ll.push(e);

            }
            }

+         }

 
 

+         var result = {
+           coordinates: ll,
+           time: time ? nodeVal(time) : null,
+           extendedValues: []
+         };

 
 

-           function textWidth(text, size, elem) {
-               var c = _textWidthCache[size];
-               if (!c) { c = _textWidthCache[size] = {}; }
+         if (heart) {
+           result.extendedValues.push(["heart", parseFloat(nodeVal(heart))]);
+         }

 
 

-               if (c[text]) {
-                   return c[text];
+         var extensions = get1(x, "extensions");

 
 

-               } else if (elem) {
-                   c[text] = elem.getComputedTextLength();
-                   return c[text];
+         if (extensions !== null) {
+           for (var _i2 = 0, _arr = ["speed", "course", "hAcc", "vAcc"]; _i2 < _arr.length; _i2++) {
+             var name = _arr[_i2];
+             var v = parseFloat(nodeVal(get1(extensions, name)));

 
 

-               } else {
-                   var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);
-                   if (str === null) {
-                       return size / 3 * 2 * text.length;
-                   } else {
-                       return size / 3 * (2 * text.length + str.length);
-                   }
-               }
+             if (!isNaN(v)) {
+               result.extendedValues.push([name, v]);
+             }

            }
            }

+         }

 
 

+         return result;
+       }

 
 

-           function drawLinePaths(selection, entities, filter, classes, labels) {
-               var paths = selection.selectAll('path')
-                   .filter(filter)
-                   .data(entities, osmEntity.key);
-
-               // exit
-               paths.exit()
-                   .remove();
-
-               // enter/update
-               paths.enter()
-                   .append('path')
-                   .style('stroke-width', get(labels, 'font-size'))
-                   .attr('id', function(d) { return 'ideditor-labelpath-' + d.id; })
-                   .attr('class', classes)
-                   .merge(paths)
-                   .attr('d', get(labels, 'lineString'));
-           }
-
-
-           function drawLineLabels(selection, entities, filter, classes, labels) {
-               var texts = selection.selectAll('text.' + classes)
-                   .filter(filter)
-                   .data(entities, osmEntity.key);
-
-               // exit
-               texts.exit()
-                   .remove();
-
-               // enter
-               texts.enter()
-                   .append('text')
-                   .attr('class', function(d, i) { return classes + ' ' + labels[i].classes + ' ' + d.id; })
-                   .attr('dy', baselineHack ? '0.35em' : null)
-                   .append('textPath')
-                   .attr('class', 'textpath');
-
-               // update
-               selection.selectAll('text.' + classes).selectAll('.textpath')
-                   .filter(filter)
-                   .data(entities, osmEntity.key)
-                   .attr('startOffset', '50%')
-                   .attr('xlink:href', function(d) { return '#ideditor-labelpath-' + d.id; })
-                   .text(utilDisplayNameForPath);
-           }
-
-
-           function drawPointLabels(selection, entities, filter, classes, labels) {
-               var texts = selection.selectAll('text.' + classes)
-                   .filter(filter)
-                   .data(entities, osmEntity.key);
-
-               // exit
-               texts.exit()
-                   .remove();
-
-               // enter/update
-               texts.enter()
-                   .append('text')
-                   .attr('class', function(d, i) {
-                       return classes + ' ' + labels[i].classes + ' ' + d.id;
-                   })
-                   .merge(texts)
-                   .attr('x', get(labels, 'x'))
-                   .attr('y', get(labels, 'y'))
-                   .style('text-anchor', get(labels, 'textAnchor'))
-                   .text(utilDisplayName)
-                   .each(function(d, i) {
-                       textWidth(utilDisplayName(d), labels[i].height, this);
-                   });
+       function getRoute(node) {
+         var line = getPoints$1(node, "rtept");
+         if (!line) return;
+         return {
+           type: "Feature",
+           properties: Object.assign(getProperties$1(node), getLineStyle(get1(node, "extensions")), {
+             _gpxType: "rte"
+           }),
+           geometry: {
+             type: "LineString",
+             coordinates: line.line

            }
            }

+         };
+       }

 
 

+       function getPoints$1(node, pointname) {
+         var pts = node.getElementsByTagName(pointname);
+         if (pts.length < 2) return; // Invalid line in GeoJSON

 
 

-           function drawAreaLabels(selection, entities, filter, classes, labels) {
-               entities = entities.filter(hasText);
-               labels = labels.filter(hasText);
-               drawPointLabels(selection, entities, filter, classes, labels);
+         var line = [];
+         var times = [];
+         var extendedValues = {};

 
 

-               function hasText(d, i) {
-                   return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
-               }
+         for (var i = 0; i < pts.length; i++) {
+           var c = coordPair$1(pts[i]);
+           line.push(c.coordinates);
+           if (c.time) times.push(c.time);
+
+           for (var j = 0; j < c.extendedValues.length; j++) {
+             var _c$extendedValues$j = _slicedToArray(c.extendedValues[j], 2),
+                 name = _c$extendedValues$j[0],
+                 val = _c$extendedValues$j[1];
+
+             var plural = name === "heart" ? name : name + "s";
+
+             if (!extendedValues[plural]) {
+               extendedValues[plural] = Array(pts.length).fill(null);
+             }
+
+             extendedValues[plural][i] = val;

            }
            }

+         }

 
 

+         return {
+           line: line,
+           times: times,
+           extendedValues: extendedValues
+         };
+       }

 
 

-           function drawAreaIcons(selection, entities, filter, classes, labels) {
-               var icons = selection.selectAll('use.' + classes)
-                   .filter(filter)
-                   .data(entities, osmEntity.key);
+       function getTrack(node) {
+         var segments = node.getElementsByTagName("trkseg");
+         var track = [];
+         var times = [];
+         var extractedLines = [];

 
 

-               // exit
-               icons.exit()
-                   .remove();
+         for (var i = 0; i < segments.length; i++) {
+           var line = getPoints$1(segments[i], "trkpt");

 
 

-               // enter/update
-               icons.enter()
-                   .append('use')
-                   .attr('class', 'icon ' + classes)
-                   .attr('width', '17px')
-                   .attr('height', '17px')
-                   .merge(icons)
-                   .attr('transform', get(labels, 'transform'))
-                   .attr('xlink:href', function(d) {
-                       var preset = _mainPresetIndex.match(d, context.graph());
-                       var picon = preset && preset.icon;
+           if (line) {
+             extractedLines.push(line);
+             if (line.times && line.times.length) times.push(line.times);
+           }
+         }

 
 

-                       if (!picon) {
-                           return '';
-                       } else {
-                           var isMaki = /^maki-/.test(picon);
-                           return '#' + picon + (isMaki ? '-15' : '');
-                       }
-                   });
+         if (extractedLines.length === 0) return;
+         var multi = extractedLines.length > 1;
+         var properties = Object.assign(getProperties$1(node), getLineStyle(get1(node, "extensions")), {
+           _gpxType: "trk"
+         }, times.length ? {
+           coordinateProperties: {
+             times: multi ? times : times[0]

            }
            }

+         } : {});

 
 

+         for (var _i3 = 0; _i3 < extractedLines.length; _i3++) {
+           var _line = extractedLines[_i3];
+           track.push(_line.line);

 
 

-           function drawCollisionBoxes(selection, rtree, which) {
-               var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
+           for (var _i4 = 0, _Object$entries = Object.entries(_line.extendedValues); _i4 < _Object$entries.length; _i4++) {
+             var _Object$entries$_i = _slicedToArray(_Object$entries[_i4], 2),
+                 name = _Object$entries$_i[0],
+                 val = _Object$entries$_i[1];

 
 

-               var gj = [];
-               if (context.getDebug('collision')) {
-                   gj = rtree.all().map(function(d) {
-                       return { type: 'Polygon', coordinates: [[
-                           [d.minX, d.minY],
-                           [d.maxX, d.minY],
-                           [d.maxX, d.maxY],
-                           [d.minX, d.maxY],
-                           [d.minX, d.minY]
-                       ]]};
-                   });
+             var props = properties;
+
+             if (name === "heart") {
+               if (!properties.coordinateProperties) {
+                 properties.coordinateProperties = {};

                }
 
                }
 

-               var boxes = selection.selectAll('.' + which)
-                   .data(gj);
+               props = properties.coordinateProperties;
+             }

 
 

-               // exit
-               boxes.exit()
-                   .remove();
+             if (multi) {
+               if (!props[name]) props[name] = extractedLines.map(function (line) {
+                 return new Array(line.line.length).fill(null);
+               });
+               props[name][_i3] = val;
+             } else {
+               props[name] = val;
+             }
+           }
+         }

 
 

-               // enter/update
-               boxes.enter()
-                   .append('path')
-                   .attr('class', classes)
-                   .merge(boxes)
-                   .attr('d', d3_geoPath());
+         return {
+           type: "Feature",
+           properties: properties,
+           geometry: multi ? {
+             type: "MultiLineString",
+             coordinates: track
+           } : {
+             type: "LineString",
+             coordinates: track[0]

            }
            }

+         };
+       }

 
 

+       function getPoint(node) {
+         return {
+           type: "Feature",
+           properties: Object.assign(getProperties$1(node), getMulti(node, ["sym"])),
+           geometry: {
+             type: "Point",
+             coordinates: coordPair$1(node).coordinates
+           }
+         };
+       }

 
 

-           function drawLabels(selection, graph, entities, filter, dimensions, fullRedraw) {
-               var wireframe = context.surface().classed('fill-wireframe');
-               var zoom = geoScaleToZoom(projection.scale());
+       function gpxGen(doc) {
+         var tracks, routes, waypoints, i, feature, _i5, _feature, _i6;

 
 

-               var labelable = [];
-               var renderNodeAs = {};
-               var i, j, k, entity, geometry;
+         return regeneratorRuntime.wrap(function gpxGen$(_context) {
+           while (1) {
+             switch (_context.prev = _context.next) {
+               case 0:
+                 tracks = doc.getElementsByTagName("trk");
+                 routes = doc.getElementsByTagName("rte");
+                 waypoints = doc.getElementsByTagName("wpt");
+                 i = 0;

 
 

-               for (i = 0; i < labelStack.length; i++) {
-                   labelable.push([]);
-               }
+               case 4:
+                 if (!(i < tracks.length)) {
+                   _context.next = 12;
+                   break;
+                 }

 
 

-               if (fullRedraw) {
-                   _rdrawn.clear();
-                   _rskipped.clear();
-                   _entitybboxes = {};
+                 feature = getTrack(tracks[i]);

 
 

-               } else {
-                   for (i = 0; i < entities.length; i++) {
-                       entity = entities[i];
-                       var toRemove = []
-                           .concat(_entitybboxes[entity.id] || [])
-                           .concat(_entitybboxes[entity.id + 'I'] || []);
-
-                       for (j = 0; j < toRemove.length; j++) {
-                           _rdrawn.remove(toRemove[j]);
-                           _rskipped.remove(toRemove[j]);
-                       }
-                   }
-               }
+                 if (!feature) {
+                   _context.next = 9;
+                   break;
+                 }

 
 

-               // Loop through all the entities to do some preprocessing
-               for (i = 0; i < entities.length; i++) {
-                   entity = entities[i];
-                   geometry = entity.geometry(graph);
+                 _context.next = 9;
+                 return feature;

 
 

-                   // Insert collision boxes around interesting points/vertices
-                   if (geometry === 'point' || (geometry === 'vertex' && isInterestingVertex(entity))) {
-                       var hasDirections = entity.directions(graph, projection).length;
-                       var markerPadding;
+               case 9:
+                 i++;
+                 _context.next = 4;
+                 break;

 
 

-                       if (!wireframe && geometry === 'point' && !(zoom >= 18 && hasDirections)) {
-                           renderNodeAs[entity.id] = 'point';
-                           markerPadding = 20;   // extra y for marker height
-                       } else {
-                           renderNodeAs[entity.id] = 'vertex';
-                           markerPadding = 0;
-                       }
+               case 12:
+                 _i5 = 0;

 
 

-                       var coord = projection(entity.loc);
-                       var nodePadding = 10;
-                       var bbox = {
-                           minX: coord[0] - nodePadding,
-                           minY: coord[1] - nodePadding - markerPadding,
-                           maxX: coord[0] + nodePadding,
-                           maxY: coord[1] + nodePadding
-                       };
+               case 13:
+                 if (!(_i5 < routes.length)) {
+                   _context.next = 21;
+                   break;
+                 }

 
 

-                       doInsert(bbox, entity.id + 'P');
-                   }
+                 _feature = getRoute(routes[_i5]);

 
 

-                   // From here on, treat vertices like points
-                   if (geometry === 'vertex') {
-                       geometry = 'point';
-                   }
+                 if (!_feature) {
+                   _context.next = 18;
+                   break;
+                 }

 
 

-                   // Determine which entities are label-able
-                   var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
-                   var icon = preset && !shouldSkipIcon(preset) && preset.icon;
+                 _context.next = 18;
+                 return _feature;

 
 

-                   if (!icon && !utilDisplayName(entity))
-                       { continue; }
+               case 18:
+                 _i5++;
+                 _context.next = 13;
+                 break;

 
 

-                   for (k = 0; k < labelStack.length; k++) {
-                       var matchGeom = labelStack[k][0];
-                       var matchKey = labelStack[k][1];
-                       var matchVal = labelStack[k][2];
-                       var hasVal = entity.tags[matchKey];
+               case 21:
+                 _i6 = 0;

 
 

-                       if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
-                           labelable[k].push(entity);
-                           break;
-                       }
-                   }
-               }
+               case 22:
+                 if (!(_i6 < waypoints.length)) {
+                   _context.next = 28;
+                   break;
+                 }

 
 

-               var positions = {
-                   point: [],
-                   line: [],
-                   area: []
-               };
+                 _context.next = 25;
+                 return getPoint(waypoints[_i6]);

 
 

-               var labelled = {
-                   point: [],
-                   line: [],
-                   area: []
-               };
+               case 25:
+                 _i6++;
+                 _context.next = 22;
+                 break;

 
 

-               // Try and find a valid label for labellable entities
-               for (k = 0; k < labelable.length; k++) {
-                   var fontSize = labelStack[k][3];
+               case 28:
+               case "end":
+                 return _context.stop();
+             }
+           }
+         }, _marked);
+       }

 
 

-                   for (i = 0; i < labelable[k].length; i++) {
-                       entity = labelable[k][i];
-                       geometry = entity.geometry(graph);
+       function gpx(doc) {
+         return {
+           type: "FeatureCollection",
+           features: Array.from(gpxGen(doc))
+         };
+       }

 
 

-                       var getName = (geometry === 'line') ? utilDisplayNameForPath : utilDisplayName;
-                       var name = getName(entity);
-                       var width = name && textWidth(name, fontSize);
-                       var p = null;
+       var removeSpace = /\s*/g;
+       var trimSpace = /^\s*|\s*$/g;
+       var splitSpace = /\s+/; // generate a short, numeric hash of a string

 
 

-                       if (geometry === 'point' || geometry === 'vertex') {
-                           // no point or vertex labels in wireframe mode
-                           // no vertex labels at low zooms (vertices have no icons)
-                           if (wireframe) { continue; }
-                           var renderAs = renderNodeAs[entity.id];
-                           if (renderAs === 'vertex' && zoom < 17) { continue; }
+       function okhash(x) {
+         if (!x || !x.length) return 0;
+         var h = 0;

 
 

-                           p = getPointLabel(entity, width, fontSize, renderAs);
+         for (var i = 0; i < x.length; i++) {
+           h = (h << 5) - h + x.charCodeAt(i) | 0;
+         }

 
 

-                       } else if (geometry === 'line') {
-                           p = getLineLabel(entity, width, fontSize);
+         return h;
+       } // get one coordinate from a coordinate array, if any

 
 

-                       } else if (geometry === 'area') {
-                           p = getAreaLabel(entity, width, fontSize);
-                       }

 
 

-                       if (p) {
-                           if (geometry === 'vertex') { geometry = 'point'; }  // treat vertex like point
-                           p.classes = geometry + ' tag-' + labelStack[k][1];
-                           positions[geometry].push(p);
-                           labelled[geometry].push(entity);
-                       }
-                   }
-               }
+       function coord1(v) {
+         return v.replace(removeSpace, "").split(",").map(parseFloat);
+       } // get all coordinates from a coordinate array as [[],[]]

 
 
 
 

-               function isInterestingVertex(entity) {
-                   var selectedIDs = context.selectedIDs();
+       function coord(v) {
+         return v.replace(trimSpace, "").split(splitSpace).map(coord1);
+       }

 
 

-                   return entity.hasInterestingTags() ||
-                       entity.isEndpoint(graph) ||
-                       entity.isConnected(graph) ||
-                       selectedIDs.indexOf(entity.id) !== -1 ||
-                       graph.parentWays(entity).some(function(parent) {
-                           return selectedIDs.indexOf(parent.id) !== -1;
-                       });
-               }
+       function xml2str(node) {
+         if (node.xml !== undefined) return node.xml;

 
 

+         if (node.tagName) {
+           var output = node.tagName;

 
 

-               function getPointLabel(entity, width, height, geometry) {
-                   var y = (geometry === 'point' ? -12 : 0);
-                   var pointOffsets = {
-                       ltr: [15, y, 'start'],
-                       rtl: [-15, y, 'end']
-                   };
+           for (var i = 0; i < node.attributes.length; i++) {
+             output += node.attributes[i].name + node.attributes[i].value;
+           }

 
 

-                   var textDirection = _mainLocalizer.textDirection();
+           for (var _i9 = 0; _i9 < node.childNodes.length; _i9++) {
+             output += xml2str(node.childNodes[_i9]);
+           }

 
 

-                   var coord = projection(entity.loc);
-                   var textPadding = 2;
-                   var offset = pointOffsets[textDirection];
-                   var p = {
-                       height: height,
-                       width: width,
-                       x: coord[0] + offset[0],
-                       y: coord[1] + offset[1],
-                       textAnchor: offset[2]
-                   };
+           return output;
+         }

 
 

-                   // insert a collision box for the text label..
-                   var bbox;
-                   if (textDirection === 'rtl') {
-                       bbox = {
-                           minX: p.x - width - textPadding,
-                           minY: p.y - (height / 2) - textPadding,
-                           maxX: p.x + textPadding,
-                           maxY: p.y + (height / 2) + textPadding
-                       };
-                   } else {
-                       bbox = {
-                           minX: p.x - textPadding,
-                           minY: p.y - (height / 2) - textPadding,
-                           maxX: p.x + width + textPadding,
-                           maxY: p.y + (height / 2) + textPadding
-                       };
-                   }
+         if (node.nodeName === "#text") {
+           return (node.nodeValue || node.value || "").trim();
+         }

 
 

-                   if (tryInsert([bbox], entity.id, true)) {
-                       return p;
-                   }
-               }
+         if (node.nodeName === "#cdata-section") {
+           return node.nodeValue;
+         }

 
 

+         return "";
+       }

 
 

-               function getLineLabel(entity, width, height) {
-                   var viewport = geoExtent(context.projection.clipExtent()).polygon();
-                   var points = graph.childNodes(entity)
-                       .map(function(node) { return projection(node.loc); });
-                   var length = geoPathLength(points);
+       var geotypes = ["Polygon", "LineString", "Point", "Track", "gx:Track"];

 
 

-                   if (length < width + 20) { return; }
+       function kmlColor(properties, elem, prefix) {
+         var v = nodeVal(get1(elem, "color")) || "";
+         var colorProp = prefix == "stroke" || prefix === "fill" ? prefix : prefix + "-color";

 
 

-                   // % along the line to attempt to place the label
-                   var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70,
-                                      25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
-                   var padding = 3;
+         if (v.substr(0, 1) === "#") {
+           v = v.substr(1);
+         }

 
 

-                   for (var i = 0; i < lineOffsets.length; i++) {
-                       var offset = lineOffsets[i];
-                       var middle = offset / 100 * length;
-                       var start = middle - width / 2;
+         if (v.length === 6 || v.length === 3) {
+           properties[colorProp] = v;
+         } else if (v.length === 8) {
+           properties[prefix + "-opacity"] = parseInt(v.substr(0, 2), 16) / 255;
+           properties[colorProp] = "#" + v.substr(6, 2) + v.substr(4, 2) + v.substr(2, 2);
+         }
+       }

 
 

-                       if (start < 0 || start + width > length) { continue; }
+       function numericProperty(properties, elem, source, target) {
+         var val = parseFloat(nodeVal(get1(elem, source)));
+         if (!isNaN(val)) properties[target] = val;
+       }

 
 

-                       // generate subpath and ignore paths that are invalid or don't cross viewport.
-                       var sub = subpath(points, start, start + width);
-                       if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
-                           continue;
-                       }
+       function gxCoords(root) {
+         var elems = root.getElementsByTagName("coord");
+         var coords = [];
+         var times = [];
+         if (elems.length === 0) elems = root.getElementsByTagName("gx:coord");

 
 

-                       var isReverse = reverse(sub);
-                       if (isReverse) {
-                           sub = sub.reverse();
-                       }
+         for (var i = 0; i < elems.length; i++) {
+           coords.push(nodeVal(elems[i]).split(" ").map(parseFloat));
+         }

 
 

-                       var bboxes = [];
-                       var boxsize = (height + 2) / 2;
-
-                       for (var j = 0; j < sub.length - 1; j++) {
-                           var a = sub[j];
-                           var b = sub[j + 1];
-
-                           // split up the text into small collision boxes
-                           var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
-
-                           for (var box = 0; box < num; box++) {
-                               var p = geoVecInterp(a, b, box / num);
-                               var x0 = p[0] - boxsize - padding;
-                               var y0 = p[1] - boxsize - padding;
-                               var x1 = p[0] + boxsize + padding;
-                               var y1 = p[1] + boxsize + padding;
-
-                               bboxes.push({
-                                   minX: Math.min(x0, x1),
-                                   minY: Math.min(y0, y1),
-                                   maxX: Math.max(x0, x1),
-                                   maxY: Math.max(y0, y1)
-                               });
-                           }
-                       }
+         var timeElems = root.getElementsByTagName("when");

 
 

-                       if (tryInsert(bboxes, entity.id, false)) {   // accept this one
-                           return {
-                               'font-size': height + 2,
-                               lineString: lineString(sub),
-                               startOffset: offset + '%'
-                           };
-                       }
-                   }
+         for (var j = 0; j < timeElems.length; j++) {
+           times.push(nodeVal(timeElems[j]));
+         }

 
 

-                   function reverse(p) {
-                       var angle = Math.atan2(p[1][1] - p[0][1], p[1][0] - p[0][0]);
-                       return !(p[0][0] < p[p.length - 1][0] && angle < Math.PI/2 && angle > -Math.PI/2);
-                   }
+         return {
+           coords: coords,
+           times: times
+         };
+       }

 
 

-                   function lineString(points) {
-                       return 'M' + points.join('L');
-                   }
+       function getGeometry(root) {
+         var geomNode;
+         var geomNodes;
+         var i;
+         var j;
+         var k;
+         var geoms = [];
+         var coordTimes = [];

 
 

-                   function subpath(points, from, to) {
-                       var sofar = 0;
-                       var start, end, i0, i1;
-
-                       for (var i = 0; i < points.length - 1; i++) {
-                           var a = points[i];
-                           var b = points[i + 1];
-                           var current = geoVecLength(a, b);
-                           var portion;
-                           if (!start && sofar + current >= from) {
-                               portion = (from - sofar) / current;
-                               start = [
-                                   a[0] + portion * (b[0] - a[0]),
-                                   a[1] + portion * (b[1] - a[1])
-                               ];
-                               i0 = i + 1;
-                           }
-                           if (!end && sofar + current >= to) {
-                               portion = (to - sofar) / current;
-                               end = [
-                                   a[0] + portion * (b[0] - a[0]),
-                                   a[1] + portion * (b[1] - a[1])
-                               ];
-                               i1 = i + 1;
-                           }
-                           sofar += current;
-                       }
+         if (get1(root, "MultiGeometry")) {
+           return getGeometry(get1(root, "MultiGeometry"));
+         }

 
 

-                       var result = points.slice(i0, i1);
-                       result.unshift(start);
-                       result.push(end);
-                       return result;
-                   }
+         if (get1(root, "MultiTrack")) {
+           return getGeometry(get1(root, "MultiTrack"));
+         }
+
+         if (get1(root, "gx:MultiTrack")) {
+           return getGeometry(get1(root, "gx:MultiTrack"));
+         }
+
+         for (i = 0; i < geotypes.length; i++) {
+           geomNodes = root.getElementsByTagName(geotypes[i]);
+
+           if (geomNodes) {
+             for (j = 0; j < geomNodes.length; j++) {
+               geomNode = geomNodes[j];
+
+               if (geotypes[i] === "Point") {
+                 geoms.push({
+                   type: "Point",
+                   coordinates: coord1(nodeVal(get1(geomNode, "coordinates")))
+                 });
+               } else if (geotypes[i] === "LineString") {
+                 geoms.push({
+                   type: "LineString",
+                   coordinates: coord(nodeVal(get1(geomNode, "coordinates")))
+                 });
+               } else if (geotypes[i] === "Polygon") {
+                 var rings = geomNode.getElementsByTagName("LinearRing"),
+                     coords = [];
+
+                 for (k = 0; k < rings.length; k++) {
+                   coords.push(coord(nodeVal(get1(rings[k], "coordinates"))));
+                 }
+
+                 geoms.push({
+                   type: "Polygon",
+                   coordinates: coords
+                 });
+               } else if (geotypes[i] === "Track" || geotypes[i] === "gx:Track") {
+                 var track = gxCoords(geomNode);
+                 geoms.push({
+                   type: "LineString",
+                   coordinates: track.coords
+                 });
+                 if (track.times.length) coordTimes.push(track.times);

                }
                }

+             }
+           }
+         }

 
 

+         return {
+           geoms: geoms,
+           coordTimes: coordTimes
+         };
+       }

 
 

-               function getAreaLabel(entity, width, height) {
-                   var centroid = path.centroid(entity.asGeoJSON(graph, true));
-                   var extent = entity.extent(graph);
-                   var areaWidth = projection(extent[1])[0] - projection(extent[0])[0];
+       function getPlacemark(root, styleIndex, styleMapIndex, styleByHash) {
+         var geomsAndTimes = getGeometry(root);
+         var i;
+         var properties = {};
+         var name = nodeVal(get1(root, "name"));
+         var address = nodeVal(get1(root, "address"));
+         var styleUrl = nodeVal(get1(root, "styleUrl"));
+         var description = nodeVal(get1(root, "description"));
+         var timeSpan = get1(root, "TimeSpan");
+         var timeStamp = get1(root, "TimeStamp");
+         var extendedData = get1(root, "ExtendedData");
+         var iconStyle = get1(root, "IconStyle");
+         var labelStyle = get1(root, "LabelStyle");
+         var lineStyle = get1(root, "LineStyle");
+         var polyStyle = get1(root, "PolyStyle");
+         var visibility = get1(root, "visibility");
+         if (name) properties.name = name;
+         if (address) properties.address = address;

 
 

-                   if (isNaN(centroid[0]) || areaWidth < 20) { return; }
+         if (styleUrl) {
+           if (styleUrl[0] !== "#") {
+             styleUrl = "#" + styleUrl;
+           }

 
 

-                   var preset = _mainPresetIndex.match(entity, context.graph());
-                   var picon = preset && preset.icon;
-                   var iconSize = 17;
-                   var padding = 2;
-                   var p = {};
-
-                   if (picon) {  // icon and label..
-                       if (addIcon()) {
-                           addLabel(iconSize + padding);
-                           return p;
-                       }
-                   } else {   // label only..
-                       if (addLabel(0)) {
-                           return p;
-                       }
-                   }
+           properties.styleUrl = styleUrl;

 
 

+           if (styleIndex[styleUrl]) {
+             properties.styleHash = styleIndex[styleUrl];
+           }

 
 

-                   function addIcon() {
-                       var iconX = centroid[0] - (iconSize / 2);
-                       var iconY = centroid[1] - (iconSize / 2);
-                       var bbox = {
-                           minX: iconX,
-                           minY: iconY,
-                           maxX: iconX + iconSize,
-                           maxY: iconY + iconSize
-                       };
+           if (styleMapIndex[styleUrl]) {
+             properties.styleMapHash = styleMapIndex[styleUrl];
+             properties.styleHash = styleIndex[styleMapIndex[styleUrl].normal];
+           } // Try to populate the lineStyle or polyStyle since we got the style hash

 
 

-                       if (tryInsert([bbox], entity.id + 'I', true)) {
-                           p.transform = 'translate(' + iconX + ',' + iconY + ')';
-                           return true;
-                       }
-                       return false;
-                   }

 
 

-                   function addLabel(yOffset) {
-                       if (width && areaWidth >= width + 20) {
-                           var labelX = centroid[0];
-                           var labelY = centroid[1] + yOffset;
-                           var bbox = {
-                               minX: labelX - (width / 2) - padding,
-                               minY: labelY - (height / 2) - padding,
-                               maxX: labelX + (width / 2) + padding,
-                               maxY: labelY + (height / 2) + padding
-                           };
-
-                           if (tryInsert([bbox], entity.id, true)) {
-                               p.x = labelX;
-                               p.y = labelY;
-                               p.textAnchor = 'middle';
-                               p.height = height;
-                               return true;
-                           }
-                       }
-                       return false;
-                   }
-               }
+           var style = styleByHash[properties.styleHash];

 
 

+           if (style) {
+             if (!iconStyle) iconStyle = get1(style, "IconStyle");
+             if (!labelStyle) labelStyle = get1(style, "LabelStyle");
+             if (!lineStyle) lineStyle = get1(style, "LineStyle");
+             if (!polyStyle) polyStyle = get1(style, "PolyStyle");
+           }
+         }

 
 

-               // force insert a singular bounding box
-               // singular box only, no array, id better be unique
-               function doInsert(bbox, id) {
-                   bbox.id = id;
+         if (description) properties.description = description;

 
 

-                   var oldbox = _entitybboxes[id];
-                   if (oldbox) {
-                       _rdrawn.remove(oldbox);
-                   }
-                   _entitybboxes[id] = bbox;
-                   _rdrawn.insert(bbox);
-               }
+         if (timeSpan) {
+           var begin = nodeVal(get1(timeSpan, "begin"));
+           var end = nodeVal(get1(timeSpan, "end"));
+           properties.timespan = {
+             begin: begin,
+             end: end
+           };
+         }

 
 

+         if (timeStamp) {
+           properties.timestamp = nodeVal(get1(timeStamp, "when"));
+         }

 
 

-               function tryInsert(bboxes, id, saveSkipped) {
-                   var skipped = false;
+         if (iconStyle) {
+           kmlColor(properties, iconStyle, "icon");
+           numericProperty(properties, iconStyle, "scale", "icon-scale");
+           numericProperty(properties, iconStyle, "heading", "icon-heading");
+           var hotspot = get1(iconStyle, "hotSpot");

 
 

-                   for (var i = 0; i < bboxes.length; i++) {
-                       var bbox = bboxes[i];
-                       bbox.id = id;
+           if (hotspot) {
+             var left = parseFloat(hotspot.getAttribute("x"));
+             var top = parseFloat(hotspot.getAttribute("y"));
+             if (!isNaN(left) && !isNaN(top)) properties["icon-offset"] = [left, top];
+           }

 
 

-                       // Check that label is visible
-                       if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
-                           skipped = true;
-                           break;
-                       }
-                       if (_rdrawn.collides(bbox)) {
-                           skipped = true;
-                           break;
-                       }
-                   }
+           var icon = get1(iconStyle, "Icon");
+
+           if (icon) {
+             var href = nodeVal(get1(icon, "href"));
+             if (href) properties.icon = href;
+           }
+         }

 
 

-                   _entitybboxes[id] = bboxes;
+         if (labelStyle) {
+           kmlColor(properties, labelStyle, "label");
+           numericProperty(properties, labelStyle, "scale", "label-scale");
+         }

 
 

-                   if (skipped) {
-                       if (saveSkipped) {
-                           _rskipped.load(bboxes);
-                       }
-                   } else {
-                       _rdrawn.load(bboxes);
-                   }
+         if (lineStyle) {
+           kmlColor(properties, lineStyle, "stroke");
+           numericProperty(properties, lineStyle, "width", "stroke-width");
+         }

 
 

-                   return !skipped;
-               }
+         if (polyStyle) {
+           kmlColor(properties, polyStyle, "fill");
+           var fill = nodeVal(get1(polyStyle, "fill"));
+           var outline = nodeVal(get1(polyStyle, "outline"));
+           if (fill) properties["fill-opacity"] = fill === "1" ? properties["fill-opacity"] || 1 : 0;
+           if (outline) properties["stroke-opacity"] = outline === "1" ? properties["stroke-opacity"] || 1 : 0;
+         }

 
 

+         if (extendedData) {
+           var datas = extendedData.getElementsByTagName("Data"),
+               simpleDatas = extendedData.getElementsByTagName("SimpleData");

 
 

-               var layer = selection.selectAll('.layer-osm.labels');
-               layer.selectAll('.labels-group')
-                   .data(['halo', 'label', 'debug'])
-                   .enter()
-                   .append('g')
-                   .attr('class', function(d) { return 'labels-group ' + d; });
+           for (i = 0; i < datas.length; i++) {
+             properties[datas[i].getAttribute("name")] = nodeVal(get1(datas[i], "value"));
+           }

 
 

-               var halo = layer.selectAll('.labels-group.halo');
-               var label = layer.selectAll('.labels-group.label');
-               var debug = layer.selectAll('.labels-group.debug');
+           for (i = 0; i < simpleDatas.length; i++) {
+             properties[simpleDatas[i].getAttribute("name")] = nodeVal(simpleDatas[i]);
+           }
+         }

 
 

-               // points
-               drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
-               drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point);
+         if (visibility) {
+           properties.visibility = nodeVal(visibility);
+         }

 
 

-               // lines
-               drawLinePaths(layer, labelled.line, filter, '', positions.line);
-               drawLineLabels(label, labelled.line, filter, 'linelabel', positions.line);
-               drawLineLabels(halo, labelled.line, filter, 'linelabel-halo', positions.line);
+         if (geomsAndTimes.coordTimes.length) {
+           properties.coordinateProperties = {
+             times: geomsAndTimes.coordTimes.length === 1 ? geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes
+           };
+         }

 
 

-               // areas
-               drawAreaLabels(label, labelled.area, filter, 'arealabel', positions.area);
-               drawAreaLabels(halo, labelled.area, filter, 'arealabel-halo', positions.area);
-               drawAreaIcons(label, labelled.area, filter, 'areaicon', positions.area);
-               drawAreaIcons(halo, labelled.area, filter, 'areaicon-halo', positions.area);
+         var feature = {
+           type: "Feature",
+           geometry: geomsAndTimes.geoms.length === 0 ? null : geomsAndTimes.geoms.length === 1 ? geomsAndTimes.geoms[0] : {
+             type: "GeometryCollection",
+             geometries: geomsAndTimes.geoms
+           },
+           properties: properties
+         };
+         if (root.getAttribute("id")) feature.id = root.getAttribute("id");
+         return feature;
+       }

 
 

-               // debug
-               drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
-               drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
+       function kmlGen(doc) {
+         var styleIndex, styleByHash, styleMapIndex, placemarks, styles, styleMaps, k, hash, l, pairs, pairsMap, m, j, feature;
+         return regeneratorRuntime.wrap(function kmlGen$(_context3) {
+           while (1) {
+             switch (_context3.prev = _context3.next) {
+               case 0:
+                 // styleindex keeps track of hashed styles in order to match feature
+                 styleIndex = {};
+                 styleByHash = {}; // stylemapindex keeps track of style maps to expose in properties

 
 

-               layer.call(filterLabels);
-           }
+                 styleMapIndex = {}; // atomic geospatial types supported by KML - MultiGeometry is
+                 // handled separately
+                 // all root placemarks in the file

 
 

+                 placemarks = doc.getElementsByTagName("Placemark");
+                 styles = doc.getElementsByTagName("Style");
+                 styleMaps = doc.getElementsByTagName("StyleMap");

 
 

-           function filterLabels(selection) {
-               var drawLayer = selection.selectAll('.layer-osm.labels');
-               var layers = drawLayer.selectAll('.labels-group.halo, .labels-group.label');
+                 for (k = 0; k < styles.length; k++) {
+                   hash = okhash(xml2str(styles[k])).toString(16);
+                   styleIndex["#" + styles[k].getAttribute("id")] = hash;
+                   styleByHash[hash] = styles[k];
+                 }

 
 

-               layers.selectAll('.nolabel')
-                   .classed('nolabel', false);
+                 for (l = 0; l < styleMaps.length; l++) {
+                   styleIndex["#" + styleMaps[l].getAttribute("id")] = okhash(xml2str(styleMaps[l])).toString(16);
+                   pairs = styleMaps[l].getElementsByTagName("Pair");
+                   pairsMap = {};

 
 

-               var mouse = context.map().mouse();
-               var graph = context.graph();
-               var selectedIDs = context.selectedIDs();
-               var ids = [];
-               var pad, bbox;
-
-               // hide labels near the mouse
-               if (mouse) {
-                   pad = 20;
-                   bbox = { minX: mouse[0] - pad, minY: mouse[1] - pad, maxX: mouse[0] + pad, maxY: mouse[1] + pad };
-                   var nearMouse = _rdrawn.search(bbox).map(function(entity) { return entity.id; });
-                   ids.push.apply(ids, nearMouse);
-               }
-
-               // hide labels on selected nodes (they look weird when dragging / haloed)
-               for (var i = 0; i < selectedIDs.length; i++) {
-                   var entity = graph.hasEntity(selectedIDs[i]);
-                   if (entity && entity.type === 'node') {
-                       ids.push(selectedIDs[i]);
+                   for (m = 0; m < pairs.length; m++) {
+                     pairsMap[nodeVal(get1(pairs[m], "key"))] = nodeVal(get1(pairs[m], "styleUrl"));

                    }
                    }

-               }

 
 

-               layers.selectAll(utilEntitySelector(ids))
-                   .classed('nolabel', true);
+                   styleMapIndex["#" + styleMaps[l].getAttribute("id")] = pairsMap;
+                 }

 
 

+                 j = 0;

 
 

-               // draw the mouse bbox if debugging is on..
-               var debug = selection.selectAll('.labels-group.debug');
-               var gj = [];
-               if (context.getDebug('collision')) {
-                   gj = bbox ? [{
-                       type: 'Polygon',
-                       coordinates: [[
-                           [bbox.minX, bbox.minY],
-                           [bbox.maxX, bbox.minY],
-                           [bbox.maxX, bbox.maxY],
-                           [bbox.minX, bbox.maxY],
-                           [bbox.minX, bbox.minY]
-                       ]]
-                   }] : [];
-               }
+               case 9:
+                 if (!(j < placemarks.length)) {
+                   _context3.next = 17;
+                   break;
+                 }
+
+                 feature = getPlacemark(placemarks[j], styleIndex, styleMapIndex, styleByHash);
+
+                 if (!feature) {
+                   _context3.next = 14;
+                   break;
+                 }

 
 

-               var box = debug.selectAll('.debug-mouse')
-                   .data(gj);
+                 _context3.next = 14;
+                 return feature;

 
 

-               // exit
-               box.exit()
-                   .remove();
+               case 14:
+                 j++;
+                 _context3.next = 9;
+                 break;

 
 

-               // enter/update
-               box.enter()
-                   .append('path')
-                   .attr('class', 'debug debug-mouse yellow')
-                   .merge(box)
-                   .attr('d', d3_geoPath());
+               case 17:
+               case "end":
+                 return _context3.stop();
+             }

            }
            }

+         }, _marked3);
+       }

 
 

+       function kml(doc) {
+         return {
+           type: "FeatureCollection",
+           features: Array.from(kmlGen(doc))
+         };
+       }

 
 

-           var throttleFilterLabels = throttle(filterLabels, 100);
+       var _initialized = false;
+       var _enabled = false;

 
 

+       var _geojson;

 
 

-           drawLabels.observe = function(selection) {
-               var listener = function() { throttleFilterLabels(selection); };
-               selection.on('mousemove.hidelabels', listener);
-               context.on('enter.hidelabels', listener);
-           };
+       function svgData(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);

 
 

+         var _showLabels = true;
+         var detected = utilDetect();
+         var layer = select(null);

 
 

-           drawLabels.off = function(selection) {
-               throttleFilterLabels.cancel();
-               selection.on('mousemove.hidelabels', null);
-               context.on('enter.hidelabels', null);
-           };
+         var _vtService;

 
 

+         var _fileList;

 
 

-           return drawLabels;
-       }
+         var _template;

 
 

-       var _layerEnabled$1 = false;
-       var _qaService$1;
+         var _src;

 
 

-       function svgImproveOSM(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-         var minZoom = 12;
+         function init() {
+           if (_initialized) return; // run once

 
 

-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var layerVisible = false;
+           _geojson = {};
+           _enabled = true;

 
 

-         function markerPath(selection, klass) {
-           selection
-             .attr('class', klass)
-             .attr('transform', 'translate(-10, -28)')
-             .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+           function over(d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             d3_event.dataTransfer.dropEffect = 'copy';
+           }
+
+           context.container().attr('dropzone', 'copy').on('drop.svgData', function (d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             if (!detected.filedrop) return;
+             drawData.fileList(d3_event.dataTransfer.files);
+           }).on('dragenter.svgData', over).on('dragexit.svgData', over).on('dragover.svgData', over);
+           _initialized = true;

          }
 
          }
 

-         // Loosely-coupled improveOSM service for fetching issues

          function getService() {
          function getService() {

-           if (services.improveOSM && !_qaService$1) {
-             _qaService$1 = services.improveOSM;
-             _qaService$1.on('loaded', throttledRedraw);
-           } else if (!services.improveOSM && _qaService$1) {
-             _qaService$1 = null;
+           if (services.vectorTile && !_vtService) {
+             _vtService = services.vectorTile;
+
+             _vtService.event.on('loadedData', throttledRedraw);
+           } else if (!services.vectorTile && _vtService) {
+             _vtService = null;

            }
 
            }
 

-           return _qaService$1;
+           return _vtService;

          }
 
          }
 

-         // Show the markers
-         function editOn() {
-           if (!layerVisible) {
-             layerVisible = true;
-             drawLayer
-               .style('display', 'block');
-           }
+         function showLayer() {
+           layerOn();
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+             dispatch.call('change');
+           });

          }
 
          }
 

-         // Immediately remove the markers and their touch targets
-         function editOff() {
-           if (layerVisible) {
-             layerVisible = false;
-             drawLayer
-               .style('display', 'none');
-             drawLayer.selectAll('.qaItem.improveOSM')
-               .remove();
-             touchLayer.selectAll('.qaItem.improveOSM')
-               .remove();
-           }
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', layerOff);

          }
 
          }
 

-         // Enable the layer.  This shows the markers and transitions them to visible.

          function layerOn() {
          function layerOn() {

-           editOn();
-
-           drawLayer
-             .style('opacity', 0)
-             .transition()
-             .duration(250)
-             .style('opacity', 1)
-             .on('end interrupt', function () { return dispatch.call('change'); });
+           layer.style('display', 'block');

          }
 
          }
 

-         // Disable the layer.  This transitions the layer invisible and then hides the markers.

          function layerOff() {
          function layerOff() {

-           throttledRedraw.cancel();
-           drawLayer.interrupt();
-           touchLayer.selectAll('.qaItem.improveOSM')
-             .remove();
-
-           drawLayer
-             .transition()
-             .duration(250)
-             .style('opacity', 0)
-             .on('end interrupt', function () {
-               editOff();
-               dispatch.call('change');
-             });
-         }
-
-         // Update the issue markers
-         function updateMarkers() {
-           if (!layerVisible || !_layerEnabled$1) { return; }
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         } // ensure that all geojson features in a collection have IDs

 
 

-           var service = getService();
-           var selectedID = context.selectedErrorID();
-           var data = (service ? service.getItems(projection) : []);
-           var getTransform = svgPointTransform(projection);

 
 

-           // Draw markers..
-           var markers = drawLayer.selectAll('.qaItem.improveOSM')
-             .data(data, function (d) { return d.id; });
+         function ensureIDs(gj) {
+           if (!gj) return null;

 
 

-           // exit
-           markers.exit()
-             .remove();
+           if (gj.type === 'FeatureCollection') {
+             for (var i = 0; i < gj.features.length; i++) {
+               ensureFeatureID(gj.features[i]);
+             }
+           } else {
+             ensureFeatureID(gj);
+           }

 
 

-           // enter
-           var markersEnter = markers.enter()
-             .append('g')
-               .attr('class', function (d) { return ("qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-           markersEnter
-             .append('polygon')
-               .call(markerPath, 'shadow');
-
-           markersEnter
-             .append('ellipse')
-               .attr('cx', 0)
-               .attr('cy', 0)
-               .attr('rx', 4.5)
-               .attr('ry', 2)
-               .attr('class', 'stroke');
-
-           markersEnter
-             .append('polygon')
-               .attr('fill', 'currentColor')
-               .call(markerPath, 'qaItem-fill');
-
-           markersEnter
-             .append('use')
-               .attr('transform', 'translate(-6.5, -23)')
-               .attr('class', 'icon-annotation')
-               .attr('width', '13px')
-               .attr('height', '13px')
-               .attr('xlink:href', function (d) {
-                 var picon = d.icon;
-
-                 if (!picon) {
-                 return '';
-                 } else {
-                 var isMaki = /^maki-/.test(picon);
-                 return ("#" + picon + (isMaki ? '-11' : ''));
-                 }
-               });
+           return gj;
+         } // ensure that each single Feature object has a unique ID

 
 

-           // update
-           markers
-             .merge(markersEnter)
-             .sort(sortY)
-               .classed('selected', function (d) { return d.id === selectedID; })
-               .attr('transform', getTransform);

 
 

+         function ensureFeatureID(feature) {
+           if (!feature) return;
+           feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
+           return feature;
+         } // Prefer an array of Features instead of a FeatureCollection

 
 

-           // Draw targets..
-           if (touchLayer.empty()) { return; }
-           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';

 
 

-           var targets = touchLayer.selectAll('.qaItem.improveOSM')
-             .data(data, function (d) { return d.id; });
-
-           // exit
-           targets.exit()
-             .remove();
-
-           // enter/update
-           targets.enter()
-             .append('rect')
-               .attr('width', '20px')
-               .attr('height', '30px')
-               .attr('x', '-10px')
-               .attr('y', '-28px')
-             .merge(targets)
-             .sort(sortY)
-               .attr('class', function (d) { return ("qaItem " + (d.service) + " target " + fillClass + " itemId-" + (d.id)); })
-               .attr('transform', getTransform);
+         function getFeatures(gj) {
+           if (!gj) return [];

 
 

-           function sortY(a, b) {
-             return (a.id === selectedID) ? 1
-               : (b.id === selectedID) ? -1
-               : b.loc[1] - a.loc[1];
+           if (gj.type === 'FeatureCollection') {
+             return gj.features;
+           } else {
+             return [gj];

            }
          }
 
            }
          }
 

-         // Draw the ImproveOSM layer and schedule loading issues and updating markers.
-         function drawImproveOSM(selection) {
-           var service = getService();
+         function featureKey(d) {
+           return d.__featurehash__;
+         }
+
+         function isPolygon(d) {
+           return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
+         }
+
+         function clipPathID(d) {
+           return 'ideditor-data-' + d.__featurehash__ + '-clippath';
+         }

 
 

+         function featureClasses(d) {
+           return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
+         }
+
+         function drawData(selection) {
+           var vtService = getService();
+           var getPath = svgPath(projection).geojson;
+           var getAreaPath = svgPath(projection, null, true).geojson;
+           var hasData = drawData.hasData();
+           layer = selection.selectAll('.layer-mapdata').data(_enabled && hasData ? [0] : []);
+           layer.exit().remove();
+           layer = layer.enter().append('g').attr('class', 'layer-mapdata').merge(layer);

            var surface = context.surface();
            var surface = context.surface();

-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           if (!surface || surface.empty()) return; // not ready to draw yet, starting up
+           // Gather data
+
+           var geoData, polygonData;
+
+           if (_template && vtService) {
+             // fetch data from vector tile service
+             var sourceID = _template;
+             vtService.loadTiles(sourceID, _template, projection);
+             geoData = vtService.data(sourceID, projection);
+           } else {
+             geoData = getFeatures(_geojson);
+           }
+
+           geoData = geoData.filter(getPath);
+           polygonData = geoData.filter(isPolygon); // Draw clip paths for polygons
+
+           var clipPaths = surface.selectAll('defs').selectAll('.clipPath-data').data(polygonData, featureKey);
+           clipPaths.exit().remove();
+           var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-data').attr('id', clipPathID);
+           clipPathsEnter.append('path');
+           clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', getAreaPath); // Draw fill, shadow, stroke layers
+
+           var datagroups = layer.selectAll('g.datagroup').data(['fill', 'shadow', 'stroke']);
+           datagroups = datagroups.enter().append('g').attr('class', function (d) {
+             return 'datagroup datagroup-' + d;
+           }).merge(datagroups); // Draw paths
+
+           var pathData = {
+             fill: polygonData,
+             shadow: geoData,
+             stroke: geoData
+           };
+           var paths = datagroups.selectAll('path').data(function (layer) {
+             return pathData[layer];
+           }, featureKey); // exit
+
+           paths.exit().remove(); // enter/update
+
+           paths = paths.enter().append('path').attr('class', function (d) {
+             var datagroup = this.parentNode.__data__;
+             return 'pathdata ' + datagroup + ' ' + featureClasses(d);
+           }).attr('clip-path', function (d) {
+             var datagroup = this.parentNode.__data__;
+             return datagroup === 'fill' ? 'url(#' + clipPathID(d) + ')' : null;
+           }).merge(paths).attr('d', function (d) {
+             var datagroup = this.parentNode.__data__;
+             return datagroup === 'fill' ? getAreaPath(d) : getPath(d);
+           }); // Draw labels
+
+           layer.call(drawLabels, 'label-halo', geoData).call(drawLabels, 'label', geoData);
+
+           function drawLabels(selection, textClass, data) {
+             var labelPath = d3_geoPath(projection);
+             var labelData = data.filter(function (d) {
+               return _showLabels && d.properties && (d.properties.desc || d.properties.name);
+             });
+             var labels = selection.selectAll('text.' + textClass).data(labelData, featureKey); // exit
+
+             labels.exit().remove(); // enter/update
+
+             labels = labels.enter().append('text').attr('class', function (d) {
+               return textClass + ' ' + featureClasses(d);
+             }).merge(labels).text(function (d) {
+               return d.properties.desc || d.properties.name;
+             }).attr('x', function (d) {
+               var centroid = labelPath.centroid(d);
+               return centroid[0] + 11;
+             }).attr('y', function (d) {
+               var centroid = labelPath.centroid(d);
+               return centroid[1];
+             });

            }
            }

+         }

 
 

-           drawLayer = selection.selectAll('.layer-improveOSM')
-             .data(service ? [0] : []);
+         function getExtension(fileName) {
+           if (!fileName) return;
+           var re = /\.(gpx|kml|(geo)?json)$/i;
+           var match = fileName.toLowerCase().match(re);
+           return match && match.length && match[0];
+         }

 
 

-           drawLayer.exit()
-             .remove();
+         function xmlToDom(textdata) {
+           return new DOMParser().parseFromString(textdata, 'text/xml');
+         }

 
 

-           drawLayer = drawLayer.enter()
-             .append('g')
-               .attr('class', 'layer-improveOSM')
-               .style('display', _layerEnabled$1 ? 'block' : 'none')
-             .merge(drawLayer);
+         drawData.setFile = function (extension, data) {
+           _template = null;
+           _fileList = null;
+           _geojson = null;
+           _src = null;
+           var gj;

 
 

-           if (_layerEnabled$1) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadIssues(projection);
-               updateMarkers();
-             } else {
-               editOff();
-             }
+           switch (extension) {
+             case '.gpx':
+               gj = gpx(xmlToDom(data));
+               break;
+
+             case '.kml':
+               gj = kml(xmlToDom(data));
+               break;
+
+             case '.geojson':
+             case '.json':
+               gj = JSON.parse(data);
+               break;

            }
            }

-         }

 
 

-         // Toggles the layer on and off
-         drawImproveOSM.enabled = function(val) {
-           if (!arguments.length) { return _layerEnabled$1; }
+           gj = gj || {};

 
 

-           _layerEnabled$1 = val;
-           if (_layerEnabled$1) {
-             layerOn();
-           } else {
-             layerOff();
-             if (context.selectedErrorID()) {
-               context.enter(modeBrowse(context));
-             }
+           if (Object.keys(gj).length) {
+             _geojson = ensureIDs(gj);
+             _src = extension + ' data file';
+             this.fitZoom();

            }
 
            dispatch.call('change');
            return this;
          };
 
            }
 
            dispatch.call('change');
            return this;
          };
 

-         drawImproveOSM.supported = function () { return !!getService(); };
+         drawData.showLabels = function (val) {
+           if (!arguments.length) return _showLabels;
+           _showLabels = val;
+           return this;
+         };

 
 

-         return drawImproveOSM;
-       }
+         drawData.enabled = function (val) {
+           if (!arguments.length) return _enabled;
+           _enabled = val;

 
 

-       var _layerEnabled$2 = false;
-       var _qaService$2;
+           if (_enabled) {
+             showLayer();
+           } else {
+             hideLayer();
+           }

 
 

-       function svgOsmose(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () { return dispatch.call('change'); }, 1000);
-         var minZoom = 12;
+           dispatch.call('change');
+           return this;
+         };

 
 

-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var layerVisible = false;
+         drawData.hasData = function () {
+           var gj = _geojson || {};
+           return !!(_template || Object.keys(gj).length);
+         };

 
 

-         function markerPath(selection, klass) {
-           selection
-             .attr('class', klass)
-             .attr('transform', 'translate(-10, -28)')
-             .attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-         }
+         drawData.template = function (val, src) {
+           if (!arguments.length) return _template; // test source against OSM imagery blocklists..

 
 

-         // Loosely-coupled osmose service for fetching issues
-         function getService() {
-           if (services.osmose && !_qaService$2) {
-             _qaService$2 = services.osmose;
-             _qaService$2.on('loaded', throttledRedraw);
-           } else if (!services.osmose && _qaService$2) {
-             _qaService$2 = null;
-           }
+           var osm = context.connection();

 
 

-           return _qaService$2;
-         }
+           if (osm) {
+             var blocklists = osm.imageryBlocklists();
+             var fail = false;
+             var tested = 0;
+             var regex;

 
 

-         // Show the markers
-         function editOn() {
-           if (!layerVisible) {
-             layerVisible = true;
-             drawLayer
-               .style('display', 'block');
-           }
-         }
+             for (var i = 0; i < blocklists.length; i++) {
+               regex = blocklists[i];
+               fail = regex.test(val);
+               tested++;
+               if (fail) break;
+             } // ensure at least one test was run.

 
 

-         // Immediately remove the markers and their touch targets
-         function editOff() {
-           if (layerVisible) {
-             layerVisible = false;
-             drawLayer
-               .style('display', 'none');
-             drawLayer.selectAll('.qaItem.osmose')
-               .remove();
-             touchLayer.selectAll('.qaItem.osmose')
-               .remove();
-           }
-         }

 
 

-         // Enable the layer.  This shows the markers and transitions them to visible.
-         function layerOn() {
-           editOn();
+             if (!tested) {
+               regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+               fail = regex.test(val);
+             }
+           }

 
 

-           drawLayer
-             .style('opacity', 0)
-             .transition()
-             .duration(250)
-             .style('opacity', 1)
-             .on('end interrupt', function () { return dispatch.call('change'); });
-         }
+           _template = val;
+           _fileList = null;
+           _geojson = null; // strip off the querystring/hash from the template,
+           // it often includes the access token

 
 

-         // Disable the layer.  This transitions the layer invisible and then hides the markers.
-         function layerOff() {
-           throttledRedraw.cancel();
-           drawLayer.interrupt();
-           touchLayer.selectAll('.qaItem.osmose')
-             .remove();
-
-           drawLayer
-             .transition()
-             .duration(250)
-             .style('opacity', 0)
-             .on('end interrupt', function () {
-               editOff();
-               dispatch.call('change');
-             });
-         }
+           _src = src || 'vectortile:' + val.split(/[?#]/)[0];
+           dispatch.call('change');
+           return this;
+         };

 
 

-         // Update the issue markers
-         function updateMarkers() {
-           if (!layerVisible || !_layerEnabled$2) { return; }
+         drawData.geojson = function (gj, src) {
+           if (!arguments.length) return _geojson;
+           _template = null;
+           _fileList = null;
+           _geojson = null;
+           _src = null;
+           gj = gj || {};

 
 

-           var service = getService();
-           var selectedID = context.selectedErrorID();
-           var data = (service ? service.getItems(projection) : []);
-           var getTransform = svgPointTransform(projection);
+           if (Object.keys(gj).length) {
+             _geojson = ensureIDs(gj);
+             _src = src || 'unknown.geojson';
+           }

 
 

-           // Draw markers..
-           var markers = drawLayer.selectAll('.qaItem.osmose')
-             .data(data, function (d) { return d.id; });
+           dispatch.call('change');
+           return this;
+         };

 
 

-           // exit
-           markers.exit()
-             .remove();
+         drawData.fileList = function (fileList) {
+           if (!arguments.length) return _fileList;
+           _template = null;
+           _fileList = fileList;
+           _geojson = null;
+           _src = null;
+           if (!fileList || !fileList.length) return this;
+           var f = fileList[0];
+           var extension = getExtension(f.name);
+           var reader = new FileReader();
+
+           reader.onload = function () {
+             return function (e) {
+               drawData.setFile(extension, e.target.result);
+             };
+           }();

 
 

-           // enter
-           var markersEnter = markers.enter()
-             .append('g')
-               .attr('class', function (d) { return ("qaItem " + (d.service) + " itemId-" + (d.id) + " itemType-" + (d.itemType)); });
-
-           markersEnter
-             .append('polygon')
-               .call(markerPath, 'shadow');
-
-           markersEnter
-             .append('ellipse')
-               .attr('cx', 0)
-               .attr('cy', 0)
-               .attr('rx', 4.5)
-               .attr('ry', 2)
-               .attr('class', 'stroke');
-
-           markersEnter
-             .append('polygon')
-               .attr('fill', function (d) { return service.getColor(d.item); })
-               .call(markerPath, 'qaItem-fill');
-
-           markersEnter
-             .append('use')
-               .attr('transform', 'translate(-6.5, -23)')
-               .attr('class', 'icon-annotation')
-               .attr('width', '13px')
-               .attr('height', '13px')
-               .attr('xlink:href', function (d) {
-                 var picon = d.icon;
-
-                 if (!picon) {
-                   return '';
-                 } else {
-                   var isMaki = /^maki-/.test(picon);
-                   return ("#" + picon + (isMaki ? '-11' : ''));
-                 }
-               });
+           reader.readAsText(f);
+           return this;
+         };

 
 

-           // update
-           markers
-             .merge(markersEnter)
-             .sort(sortY)
-               .classed('selected', function (d) { return d.id === selectedID; })
-               .attr('transform', getTransform);
-
-           // Draw targets..
-           if (touchLayer.empty()) { return; }
-           var fillClass = context.getDebug('target') ? 'pink' : 'nocolor';
+         drawData.url = function (url, defaultExtension) {
+           _template = null;
+           _fileList = null;
+           _geojson = null;
+           _src = null; // strip off any querystring/hash from the url before checking extension

 
 

-           var targets = touchLayer.selectAll('.qaItem.osmose')
-             .data(data, function (d) { return d.id; });
-
-           // exit
-           targets.exit()
-             .remove();
-
-           // enter/update
-           targets.enter()
-             .append('rect')
-               .attr('width', '20px')
-               .attr('height', '30px')
-               .attr('x', '-10px')
-               .attr('y', '-28px')
-             .merge(targets)
-             .sort(sortY)
-               .attr('class', function (d) { return ("qaItem " + (d.service) + " target " + fillClass + " itemId-" + (d.id)); })
-               .attr('transform', getTransform);
+           var testUrl = url.split(/[?#]/)[0];
+           var extension = getExtension(testUrl) || defaultExtension;

 
 

-           function sortY(a, b) {
-             return (a.id === selectedID) ? 1
-               : (b.id === selectedID) ? -1
-               : b.loc[1] - a.loc[1];
+           if (extension) {
+             _template = null;
+             d3_text(url).then(function (data) {
+               drawData.setFile(extension, data);
+             })["catch"](function () {
+               /* ignore */
+             });
+           } else {
+             drawData.template(url);

            }
            }

-         }

 
 

-         // Draw the Osmose layer and schedule loading issues and updating markers.
-         function drawOsmose(selection) {
-           var service = getService();
+           return this;
+         };

 
 

-           var surface = context.surface();
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-           }
+         drawData.getSrc = function () {
+           return _src || '';
+         };
+
+         drawData.fitZoom = function () {
+           var features = getFeatures(_geojson);
+           if (!features.length) return;
+           var map = context.map();
+           var viewport = map.trimmedExtent().polygon();
+           var coords = features.reduce(function (coords, feature) {
+             var geom = feature.geometry;
+             if (!geom) return coords;
+             var c = geom.coordinates;
+             /* eslint-disable no-fallthrough */

 
 

-           drawLayer = selection.selectAll('.layer-osmose')
-             .data(service ? [0] : []);
+             switch (geom.type) {
+               case 'Point':
+                 c = [c];

 
 

-           drawLayer.exit()
-             .remove();
+               case 'MultiPoint':
+               case 'LineString':
+                 break;

 
 

-           drawLayer = drawLayer.enter()
-             .append('g')
-               .attr('class', 'layer-osmose')
-               .style('display', _layerEnabled$2 ? 'block' : 'none')
-             .merge(drawLayer);
+               case 'MultiPolygon':
+                 c = utilArrayFlatten(c);

 
 

-           if (_layerEnabled$2) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadIssues(projection);
-               updateMarkers();
-             } else {
-               editOff();
+               case 'Polygon':
+               case 'MultiLineString':
+                 c = utilArrayFlatten(c);
+                 break;

              }
              }

-           }
-         }
+             /* eslint-enable no-fallthrough */

 
 

-         // Toggles the layer on and off
-         drawOsmose.enabled = function(val) {
-           if (!arguments.length) { return _layerEnabled$2; }

 
 

-           _layerEnabled$2 = val;
-           if (_layerEnabled$2) {
-             // Strings supplied by Osmose fetched before showing layer for first time
-             // NOTE: Currently no way to change locale in iD at runtime, would need to re-call this method if that's ever implemented
-             // Also, If layer is toggled quickly multiple requests are sent
-             getService().loadStrings()
-               .then(layerOn)
-               .catch(function (err) {
-                 console.log(err); // eslint-disable-line no-console
-               });
-           } else {
-             layerOff();
-             if (context.selectedErrorID()) {
-               context.enter(modeBrowse(context));
-             }
+             return utilArrayUnion(coords, c);
+           }, []);
+
+           if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
+             var extent = geoExtent(d3_geoBounds({
+               type: 'LineString',
+               coordinates: coords
+             }));
+             map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));

            }
 
            }
 

-           dispatch.call('change');

            return this;
          };
 
            return this;
          };
 

-         drawOsmose.supported = function () { return !!getService(); };
-
-         return drawOsmose;
+         init();
+         return drawData;

        }
 
        }
 

-       function svgStreetside(projection, context, dispatch) {
-           var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-           var minZoom = 14;
-           var minMarkerZoom = 16;
-           var minViewfieldZoom = 18;
-           var layer = select(null);
-           var _viewerYaw = 0;
-           var _selectedSequence = null;
-           var _streetside;
+       function svgDebug(projection, context) {
+         function drawDebug(selection) {
+           var showTile = context.getDebug('tile');
+           var showCollision = context.getDebug('collision');
+           var showImagery = context.getDebug('imagery');
+           var showTouchTargets = context.getDebug('target');
+           var showDownloaded = context.getDebug('downloaded');
+           var debugData = [];

 
 

-           /**
-            * init().
-            */
-           function init() {
-               if (svgStreetside.initialized) { return; }  // run once
-               svgStreetside.enabled = false;
-               svgStreetside.initialized = true;
+           if (showTile) {
+             debugData.push({
+               "class": 'red',
+               label: 'tile'
+             });

            }
 
            }
 

-           /**
-            * getService().
-            */
-           function getService() {
-               if (services.streetside && !_streetside) {
-                   _streetside = services.streetside;
-                   _streetside.event
-                       .on('viewerChanged.svgStreetside', viewerChanged)
-                       .on('loadedBubbles.svgStreetside', throttledRedraw);
-               } else if (!services.streetside && _streetside) {
-                   _streetside = null;
-               }
-
-               return _streetside;
+           if (showCollision) {
+             debugData.push({
+               "class": 'yellow',
+               label: 'collision'
+             });

            }
 
            }
 

-           /**
-            * showLayer().
-            */
-           function showLayer() {
-               var service = getService();
-               if (!service) { return; }
+           if (showImagery) {
+             debugData.push({
+               "class": 'orange',
+               label: 'imagery'
+             });
+           }

 
 

-               editOn();
+           if (showTouchTargets) {
+             debugData.push({
+               "class": 'pink',
+               label: 'touchTargets'
+             });
+           }

 
 

-               layer
-                   .style('opacity', 0)
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 1)
-                   .on('end', function () { dispatch.call('change'); });
+           if (showDownloaded) {
+             debugData.push({
+               "class": 'purple',
+               label: 'downloaded'
+             });

            }
 
            }
 

-           /**
-            * hideLayer().
-            */
-           function hideLayer() {
-               throttledRedraw.cancel();
+           var legend = context.container().select('.main-content').selectAll('.debug-legend').data(debugData.length ? [0] : []);
+           legend.exit().remove();
+           legend = legend.enter().append('div').attr('class', 'fillD debug-legend').merge(legend);
+           var legendItems = legend.selectAll('.debug-legend-item').data(debugData, function (d) {
+             return d.label;
+           });
+           legendItems.exit().remove();
+           legendItems.enter().append('span').attr('class', function (d) {
+             return "debug-legend-item ".concat(d["class"]);
+           }).text(function (d) {
+             return d.label;
+           });
+           var layer = selection.selectAll('.layer-debug').data(showImagery || showDownloaded ? [0] : []);
+           layer.exit().remove();
+           layer = layer.enter().append('g').attr('class', 'layer-debug').merge(layer); // imagery

 
 

-               layer
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 0)
-                   .on('end', editOff);
-           }
+           var extent = context.map().extent();
+           _mainFileFetcher.get('imagery').then(function (d) {
+             var hits = showImagery && d.query.bbox(extent.rectangle(), true) || [];
+             var features = hits.map(function (d) {
+               return d.features[d.id];
+             });
+             var imagery = layer.selectAll('path.debug-imagery').data(features);
+             imagery.exit().remove();
+             imagery.enter().append('path').attr('class', 'debug-imagery debug orange');
+           })["catch"](function () {
+             /* ignore */
+           }); // downloaded

 
 

-           /**
-            * editOn().
-            */
-           function editOn() {
-               layer.style('display', 'block');
+           var osm = context.connection();
+           var dataDownloaded = [];
+
+           if (osm && showDownloaded) {
+             var rtree = osm.caches('get').tile.rtree;
+             dataDownloaded = rtree.all().map(function (bbox) {
+               return {
+                 type: 'Feature',
+                 properties: {
+                   id: bbox.id
+                 },
+                 geometry: {
+                   type: 'Polygon',
+                   coordinates: [[[bbox.minX, bbox.minY], [bbox.minX, bbox.maxY], [bbox.maxX, bbox.maxY], [bbox.maxX, bbox.minY], [bbox.minX, bbox.minY]]]
+                 }
+               };
+             });

            }
 
            }
 

-           /**
-            * editOff().
-            */
-           function editOff() {
-               layer.selectAll('.viewfield-group').remove();
-               layer.style('display', 'none');
+           var downloaded = layer.selectAll('path.debug-downloaded').data(showDownloaded ? dataDownloaded : []);
+           downloaded.exit().remove();
+           downloaded.enter().append('path').attr('class', 'debug-downloaded debug purple'); // update
+
+           layer.selectAll('path').attr('d', svgPath(projection).geojson);
+         } // This looks strange because `enabled` methods on other layers are
+         // chainable getter/setters, and this one is just a getter.
+
+
+         drawDebug.enabled = function () {
+           if (!arguments.length) {
+             return context.getDebug('tile') || context.getDebug('collision') || context.getDebug('imagery') || context.getDebug('target') || context.getDebug('downloaded');
+           } else {
+             return this;

            }
            }

+         };

 
 

-           /**
-            * click() Handles 'bubble' point click event.
-            */
-           function click(d) {
-               var service = getService();
-               if (!service) { return; }
+         return drawDebug;
+       }

 
 

-               // try to preserve the viewer rotation when staying on the same sequence
-               if (d.sequenceKey !== _selectedSequence) {
-                   _viewerYaw = 0;  // reset
-               }
-               _selectedSequence = d.sequenceKey;
+       /*
+           A standalone SVG element that contains only a `defs` sub-element. To be
+           used once globally, since defs IDs must be unique within a document.
+       */

 
 

-               service
-                   .selectImage(context, d)
-                   .then(function (response) {
-                       if (response.status === 'ok'){
-                           service.showViewer(context, _viewerYaw);
-                       }
-                   });
+       function svgDefs(context) {
+         var _defsSelection = select(null);

 
 

+         var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];

 
 

-               context.map().centerEase(d.loc);
-           }
+         function drawDefs(selection) {
+           _defsSelection = selection.append('defs'); // add markers

 
 

-           /**
-            * mouseover().
-            */
-           function mouseover(d) {
-               var service = getService();
-               if (service) { service.setStyles(context, d); }
-           }
+           _defsSelection.append('marker').attr('id', 'ideditor-oneway-marker').attr('viewBox', '0 0 10 5').attr('refX', 2.5).attr('refY', 2.5).attr('markerWidth', 2).attr('markerHeight', 2).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'oneway-marker-path').attr('d', 'M 5,3 L 0,3 L 0,2 L 5,2 L 5,0 L 10,2.5 L 5,5 z').attr('stroke', 'none').attr('fill', '#000').attr('opacity', '0.75'); // SVG markers have to be given a colour where they're defined
+           // (they can't inherit it from the line they're attached to),
+           // so we need to manually define markers for each color of tag
+           // (also, it's slightly nicer if we can control the
+           // positioning for different tags)

 
 

-           /**
-            * mouseout().
-            */
-           function mouseout() {
-               var service = getService();
-               if (service) { service.setStyles(context, null); }
-           }

 
 

-           /**
-            * transform().
-            */
-           function transform(d) {
-               var t = svgPointTransform(projection)(d);
-               var rot = d.ca + _viewerYaw;
-               if (rot) {
-                   t += ' rotate(' + Math.floor(rot) + ',0,0)';
-               }
-               return t;
+           function addSidedMarker(name, color, offset) {
+             _defsSelection.append('marker').attr('id', 'ideditor-sided-marker-' + name).attr('viewBox', '0 0 2 2').attr('refX', 1).attr('refY', -offset).attr('markerWidth', 1.5).attr('markerHeight', 1.5).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'sided-marker-path sided-marker-' + name + '-path').attr('d', 'M 0,0 L 1,1 L 2,0 z').attr('stroke', 'none').attr('fill', color);

            }
 
            }
 

+           addSidedMarker('natural', 'rgb(170, 170, 170)', 0); // for a coastline, the arrows are (somewhat unintuitively) on
+           // the water side, so let's color them blue (with a gap) to
+           // give a stronger indication

 
 

-           function viewerChanged() {
-               var service = getService();
-               if (!service) { return; }
+           addSidedMarker('coastline', '#77dede', 1);
+           addSidedMarker('waterway', '#77dede', 1); // barriers have a dashed line, and separating the triangle
+           // from the line visually suits that

 
 

-               var viewer = service.viewer();
-               if (!viewer) { return; }
+           addSidedMarker('barrier', '#ddd', 1);
+           addSidedMarker('man_made', '#fff', 0);

 
 

-               // update viewfield rotation
-               _viewerYaw = viewer.getYaw();
+           _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', '#333').attr('fill-opacity', '0.75').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75');

 
 

-               // avoid updating if the map is currently transformed
-               // e.g. during drags or easing.
-               if (context.map().isTransformed()) { return; }
+           _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker-wireframe').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', 'none').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75'); // add patterns

 
 

-               layer.selectAll('.viewfield-group.currentView')
-                   .attr('transform', transform);
-           }

 
 

+           var patterns = _defsSelection.selectAll('pattern').data([// pattern name, pattern image name
+           ['beach', 'dots'], ['construction', 'construction'], ['cemetery', 'cemetery'], ['cemetery_christian', 'cemetery_christian'], ['cemetery_buddhist', 'cemetery_buddhist'], ['cemetery_muslim', 'cemetery_muslim'], ['cemetery_jewish', 'cemetery_jewish'], ['farmland', 'farmland'], ['farmyard', 'farmyard'], ['forest', 'forest'], ['forest_broadleaved', 'forest_broadleaved'], ['forest_needleleaved', 'forest_needleleaved'], ['forest_leafless', 'forest_leafless'], ['golf_green', 'grass'], ['grass', 'grass'], ['landfill', 'landfill'], ['meadow', 'grass'], ['orchard', 'orchard'], ['pond', 'pond'], ['quarry', 'quarry'], ['scrub', 'bushes'], ['vineyard', 'vineyard'], ['water_standing', 'lines'], ['waves', 'waves'], ['wetland', 'wetland'], ['wetland_marsh', 'wetland_marsh'], ['wetland_swamp', 'wetland_swamp'], ['wetland_bog', 'wetland_bog'], ['wetland_reedbed', 'wetland_reedbed']]).enter().append('pattern').attr('id', function (d) {
+             return 'ideditor-pattern-' + d[0];
+           }).attr('width', 32).attr('height', 32).attr('patternUnits', 'userSpaceOnUse');

 
 

-           context.photos().on('change.streetside', update);
+           patterns.append('rect').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('class', function (d) {
+             return 'pattern-color-' + d[0];
+           });
+           patterns.append('image').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('xlink:href', function (d) {
+             return context.imagePath('pattern/' + d[1] + '.png');
+           }); // add clip paths
+
+           _defsSelection.selectAll('clipPath').data([12, 18, 20, 32, 45]).enter().append('clipPath').attr('id', function (d) {
+             return 'ideditor-clip-square-' + d;
+           }).append('rect').attr('x', 0).attr('y', 0).attr('width', function (d) {
+             return d;
+           }).attr('height', function (d) {
+             return d;
+           }); // add symbol spritesheets

 
 

-           /**
-            * update().
-            */
-           function update() {
-               var viewer = context.container().select('.photoviewer');
-               var selected = viewer.empty() ? undefined : viewer.datum();
-               var z = ~~context.map().zoom();
-               var showMarkers = (z >= minMarkerZoom);
-               var showViewfields = (z >= minViewfieldZoom);
-               var service = getService();

 
 

-               var sequences = [];
-               var bubbles = [];
+           addSprites(_spritesheetIds, true);
+         }
+
+         function addSprites(ids, overrideColors) {
+           _spritesheetIds = utilArrayUniq(_spritesheetIds.concat(ids));
+
+           var spritesheets = _defsSelection.selectAll('.spritesheet').data(_spritesheetIds);
+
+           spritesheets.enter().append('g').attr('class', function (d) {
+             return 'spritesheet spritesheet-' + d;
+           }).each(function (d) {
+             var url = context.imagePath(d + '.svg');
+             var node = select(this).node();
+             svg(url).then(function (svg) {
+               node.appendChild(select(svg.documentElement).attr('id', 'ideditor-' + d).node());

 
 

-               if (context.photos().showsPanoramic()) {
-                   sequences = (service ? service.sequences(projection) : []);
-                   bubbles = (service && showMarkers ? service.bubbles(projection) : []);
+               if (overrideColors && d !== 'iD-sprite') {
+                 // allow icon colors to be overridden..
+                 select(node).selectAll('path').attr('fill', 'currentColor');

                }
                }

+             })["catch"](function () {
+               /* ignore */
+             });
+           });
+           spritesheets.exit().remove();
+         }

 
 

-               var traces = layer.selectAll('.sequences').selectAll('.sequence')
-                   .data(sequences, function(d) { return d.properties.key; });
+         drawDefs.addSprites = addSprites;
+         return drawDefs;
+       }

 
 

-               // exit
-               traces.exit()
-                   .remove();
+       var _layerEnabled$2 = false;

 
 

-               // enter/update
-               traces = traces.enter()
-                   .append('path')
-                   .attr('class', 'sequence')
-                   .merge(traces)
-                   .attr('d', svgPath(projection).geojson);
+       var _qaService$2;

 
 

+       function svgKeepRight(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           return dispatch.call('change');
+         }, 1000);

 
 

-               var groups = layer.selectAll('.markers').selectAll('.viewfield-group')
-                   .data(bubbles, function(d) {
-                       // force reenter once bubbles are attached to a sequence
-                       return d.key + (d.sequenceKey ? 'v1' : 'v0');
-                   });
+         var minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var layerVisible = false;

 
 

-               // exit
-               groups.exit()
-                   .remove();
-
-               // enter
-               var groupsEnter = groups.enter()
-                   .append('g')
-                   .attr('class', 'viewfield-group')
-                   .on('mouseenter', mouseover)
-                   .on('mouseleave', mouseout)
-                   .on('click', click);
-
-               groupsEnter
-                   .append('g')
-                   .attr('class', 'viewfield-scale');
-
-               // update
-               var markers = groups
-                   .merge(groupsEnter)
-                   .sort(function(a, b) {
-                       return (a === selected) ? 1
-                           : (b === selected) ? -1
-                           : b.loc[1] - a.loc[1];
-                   })
-                   .attr('transform', transform)
-                   .select('.viewfield-scale');
-
-
-               markers.selectAll('circle')
-                   .data([0])
-                   .enter()
-                   .append('circle')
-                   .attr('dx', '0')
-                   .attr('dy', '0')
-                   .attr('r', '6');
-
-               var viewfields = markers.selectAll('.viewfield')
-                   .data(showViewfields ? [0] : []);
-
-               viewfields.exit()
-                   .remove();
-
-               // viewfields may or may not be drawn...
-               // but if they are, draw below the circles
-               viewfields.enter()
-                   .insert('path', 'circle')
-                   .attr('class', 'viewfield')
-                   .attr('transform', 'scale(1.5,1.5),translate(-8, -13)')
-                   .attr('d', viewfieldPath);
-
-               function viewfieldPath() {
-                   var d = this.parentNode.__data__;
-                   if (d.pano) {
-                       return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-                   } else {
-                       return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-                   }
-               }
+         function markerPath(selection, klass) {
+           selection.attr('class', klass).attr('transform', 'translate(-4, -24)').attr('d', 'M11.6,6.2H7.1l1.4-5.1C8.6,0.6,8.1,0,7.5,0H2.2C1.7,0,1.3,0.3,1.3,0.8L0,10.2c-0.1,0.6,0.4,1.1,0.9,1.1h4.6l-1.8,7.6C3.6,19.4,4.1,20,4.7,20c0.3,0,0.6-0.2,0.8-0.5l6.9-11.9C12.7,7,12.3,6.2,11.6,6.2z');
+         } // Loosely-coupled keepRight service for fetching issues.
+
+
+         function getService() {
+           if (services.keepRight && !_qaService$2) {
+             _qaService$2 = services.keepRight;

 
 

+             _qaService$2.on('loaded', throttledRedraw);
+           } else if (!services.keepRight && _qaService$2) {
+             _qaService$2 = null;

            }
 
            }
 

-           /**
-            * drawImages()
-            * drawImages is the method that is returned (and that runs) everytime 'svgStreetside()' is called.
-            * 'svgStreetside()' is called from index.js
-            */
-           function drawImages(selection) {
-               var enabled = svgStreetside.enabled;
-               var service = getService();
+           return _qaService$2;
+         } // Show the markers

 
 

-               layer = selection.selectAll('.layer-streetside-images')
-                   .data(service ? [0] : []);

 
 

-               layer.exit()
-                   .remove();
+         function editOn() {
+           if (!layerVisible) {
+             layerVisible = true;
+             drawLayer.style('display', 'block');
+           }
+         } // Immediately remove the markers and their touch targets

 
 

-               var layerEnter = layer.enter()
-                   .append('g')
-                   .attr('class', 'layer-streetside-images')
-                   .style('display', enabled ? 'block' : 'none');

 
 

-               layerEnter
-                   .append('g')
-                   .attr('class', 'sequences');
+         function editOff() {
+           if (layerVisible) {
+             layerVisible = false;
+             drawLayer.style('display', 'none');
+             drawLayer.selectAll('.qaItem.keepRight').remove();
+             touchLayer.selectAll('.qaItem.keepRight').remove();
+           }
+         } // Enable the layer.  This shows the markers and transitions them to visible.

 
 

-               layerEnter
-                   .append('g')
-                   .attr('class', 'markers');

 
 

-               layer = layerEnter
-                   .merge(layer);
+         function layerOn() {
+           editOn();
+           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+             return dispatch.call('change');
+           });
+         } // Disable the layer.  This transitions the layer invisible and then hides the markers.

 
 

-               if (enabled) {
-                   if (service && ~~context.map().zoom() >= minZoom) {
-                       editOn();
-                       update();
-                       service.loadBubbles(projection);
-                   } else {
-                       editOff();
-                   }
-               }
-           }

 
 

+         function layerOff() {
+           throttledRedraw.cancel();
+           drawLayer.interrupt();
+           touchLayer.selectAll('.qaItem.keepRight').remove();
+           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+             editOff();
+             dispatch.call('change');
+           });
+         } // Update the issue markers

 
 

-           /**
-            * drawImages.enabled().
-            */
-           drawImages.enabled = function(_) {
-               if (!arguments.length) { return svgStreetside.enabled; }
-               svgStreetside.enabled = _;
-               if (svgStreetside.enabled) {
-                   showLayer();
-               } else {
-                   hideLayer();
-               }
-               dispatch.call('change');
-               return this;
-           };

 
 

-           /**
-            * drawImages.supported().
-            */
-           drawImages.supported = function() {
-               return !!getService();
-           };
+         function updateMarkers() {
+           if (!layerVisible || !_layerEnabled$2) return;
+           var service = getService();
+           var selectedID = context.selectedErrorID();
+           var data = service ? service.getItems(projection) : [];
+           var getTransform = svgPointTransform(projection); // Draw markers..

 
 

-           init();
+           var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+             return d.id;
+           }); // exit

 
 

-           return drawImages;
-       }
+           markers.exit().remove(); // enter

 
 

-       function svgMapillaryImages(projection, context, dispatch) {
-           var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-           var minZoom = 12;
-           var minMarkerZoom = 16;
-           var minViewfieldZoom = 18;
-           var layer = select(null);
-           var _mapillary;
-           var viewerCompassAngle;
-
-
-           function init() {
-               if (svgMapillaryImages.initialized) { return; }  // run once
-               svgMapillaryImages.enabled = false;
-               svgMapillaryImages.initialized = true;
-           }
-
-
-           function getService() {
-               if (services.mapillary && !_mapillary) {
-                   _mapillary = services.mapillary;
-                   _mapillary.event.on('loadedImages', throttledRedraw);
-                   _mapillary.event.on('bearingChanged', function(e) {
-                       viewerCompassAngle = e;
-
-                       // avoid updating if the map is currently transformed
-                       // e.g. during drags or easing.
-                       if (context.map().isTransformed()) { return; }
-
-                       layer.selectAll('.viewfield-group.currentView')
-                           .filter(function(d) {
-                               return d.pano;
-                           })
-                           .attr('transform', transform);
-                   });
-               } else if (!services.mapillary && _mapillary) {
-                   _mapillary = null;
-               }
+           var markersEnter = markers.enter().append('g').attr('class', function (d) {
+             return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
+           });
+           markersEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+           markersEnter.append('path').call(markerPath, 'shadow');
+           markersEnter.append('use').attr('class', 'qaItem-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-bolt'); // update

 
 

-               return _mapillary;
-           }
+           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+             return d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..

 
 

+           if (touchLayer.empty()) return;
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var targets = touchLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+             return d.id;
+           }); // exit

 
 

-           function showLayer() {
-               var service = getService();
-               if (!service) { return; }
+           targets.exit().remove(); // enter/update

 
 

-               editOn();
+           targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
+             return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+           }).attr('transform', getTransform);

 
 

-               layer
-                   .style('opacity', 0)
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 1)
-                   .on('end', function () { dispatch.call('change'); });
+           function sortY(a, b) {
+             return a.id === selectedID ? 1 : b.id === selectedID ? -1 : a.severity === 'error' && b.severity !== 'error' ? 1 : b.severity === 'error' && a.severity !== 'error' ? -1 : b.loc[1] - a.loc[1];

            }
            }

+         } // Draw the keepRight layer and schedule loading issues and updating markers.

 
 
 
 

-           function hideLayer() {
-               throttledRedraw.cancel();
+         function drawKeepRight(selection) {
+           var service = getService();
+           var surface = context.surface();

 
 

-               layer
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 0)
-                   .on('end', editOff);
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');

            }
 
            }
 

+           drawLayer = selection.selectAll('.layer-keepRight').data(service ? [0] : []);
+           drawLayer.exit().remove();
+           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-keepRight').style('display', _layerEnabled$2 ? 'block' : 'none').merge(drawLayer);

 
 

-           function editOn() {
-               layer.style('display', 'block');
+           if (_layerEnabled$2) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadIssues(projection);
+               updateMarkers();
+             } else {
+               editOff();
+             }

            }
            }

+         } // Toggles the layer on and off

 
 
 
 

-           function editOff() {
-               layer.selectAll('.viewfield-group').remove();
-               layer.style('display', 'none');
+         drawKeepRight.enabled = function (val) {
+           if (!arguments.length) return _layerEnabled$2;
+           _layerEnabled$2 = val;
+
+           if (_layerEnabled$2) {
+             layerOn();
+           } else {
+             layerOff();
+
+             if (context.selectedErrorID()) {
+               context.enter(modeBrowse(context));
+             }

            }
 
            }
 

+           dispatch.call('change');
+           return this;
+         };
+
+         drawKeepRight.supported = function () {
+           return !!getService();
+         };

 
 

-           function click(d) {
-               var service = getService();
-               if (!service) { return; }
+         return drawKeepRight;
+       }

 
 

-               service
-                   .selectImage(context, d.key)
-                   .updateViewer(context, d.key)
-                   .showViewer(context);
+       function svgGeolocate(projection) {
+         var layer = select(null);

 
 

-               context.map().centerEase(d.loc);
-           }
+         var _position;

 
 

+         function init() {
+           if (svgGeolocate.initialized) return; // run once

 
 

-           function mouseover(d) {
-               var service = getService();
-               if (service) { service.setStyles(context, d); }
-           }
+           svgGeolocate.enabled = false;
+           svgGeolocate.initialized = true;
+         }

 
 

+         function showLayer() {
+           layer.style('display', 'block');
+         }

 
 

-           function mouseout() {
-               var service = getService();
-               if (service) { service.setStyles(context, null); }
-           }
+         function hideLayer() {
+           layer.transition().duration(250).style('opacity', 0);
+         }
+
+         function layerOn() {
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
+         }

 
 

+         function layerOff() {
+           layer.style('display', 'none');
+         }

 
 

-           function transform(d) {
-               var t = svgPointTransform(projection)(d);
-               if (d.pano && viewerCompassAngle !== null && isFinite(viewerCompassAngle)) {
-                   t += ' rotate(' + Math.floor(viewerCompassAngle) + ',0,0)';
-               } else if (d.ca) {
-                   t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
-               }
-               return t;
-           }
+         function transform(d) {
+           return svgPointTransform(projection)(d);
+         }

 
 

-           context.photos().on('change.mapillary_images', update);
+         function accuracy(accuracy, loc) {
+           // converts accuracy to pixels...
+           var degreesRadius = geoMetersToLat(accuracy),
+               tangentLoc = [loc[0], loc[1] + degreesRadius],
+               projectedTangent = projection(tangentLoc),
+               projectedLoc = projection([loc[0], loc[1]]); // southern most point will have higher pixel value...

 
 

-           function filterImages(images) {
-               var showsPano = context.photos().showsPanoramic();
-               var showsFlat = context.photos().showsFlat();
-               if (!showsPano || !showsFlat) {
-                   images = images.filter(function(image) {
-                       if (image.pano) { return showsPano; }
-                       return showsFlat;
-                   });
-               }
-               return images;
-           }
+           return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
+         }

 
 

-           function filterSequences(sequences, service) {
-               var showsPano = context.photos().showsPanoramic();
-               var showsFlat = context.photos().showsFlat();
-               if (!showsPano || !showsFlat) {
-                   sequences = sequences.filter(function(sequence) {
-                       if (sequence.properties.hasOwnProperty('pano')) {
-                           if (sequence.properties.pano) { return showsPano; }
-                           return showsFlat;
-                       } else {
-                           // if the sequence doesn't specify pano or not, search its images
-                           var cProps = sequence.properties.coordinateProperties;
-                           if (cProps && cProps.image_keys && cProps.image_keys.length > 0) {
-                               for (var index in cProps.image_keys) {
-                                   var imageKey = cProps.image_keys[index];
-                                   var image = service.cachedImage(imageKey);
-                                   if (image && image.hasOwnProperty('pano')) {
-                                       if (image.pano) { return showsPano; }
-                                       return showsFlat;
-                                   }
-                               }
-                           }
-                       }
-                   });
-               }
-               return sequences;
+         function update() {
+           var geolocation = {
+             loc: [_position.coords.longitude, _position.coords.latitude]
+           };
+           var groups = layer.selectAll('.geolocations').selectAll('.geolocation').data([geolocation]);
+           groups.exit().remove();
+           var pointsEnter = groups.enter().append('g').attr('class', 'geolocation');
+           pointsEnter.append('circle').attr('class', 'geolocate-radius').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('fill-opacity', '0.3').attr('r', '0');
+           pointsEnter.append('circle').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('stroke', 'white').attr('stroke-width', '1.5').attr('r', '6');
+           groups.merge(pointsEnter).attr('transform', transform);
+           layer.select('.geolocate-radius').attr('r', accuracy(_position.coords.accuracy, geolocation.loc));
+         }
+
+         function drawLocation(selection) {
+           var enabled = svgGeolocate.enabled;
+           layer = selection.selectAll('.layer-geolocate').data([0]);
+           layer.exit().remove();
+           var layerEnter = layer.enter().append('g').attr('class', 'layer-geolocate').style('display', enabled ? 'block' : 'none');
+           layerEnter.append('g').attr('class', 'geolocations');
+           layer = layerEnter.merge(layer);
+
+           if (enabled) {
+             update();
+           } else {
+             layerOff();

            }
            }

+         }

 
 

-           function update() {
+         drawLocation.enabled = function (position, enabled) {
+           if (!arguments.length) return svgGeolocate.enabled;
+           _position = position;
+           svgGeolocate.enabled = enabled;

 
 

-               var z = ~~context.map().zoom();
-               var showMarkers = (z >= minMarkerZoom);
-               var showViewfields = (z >= minViewfieldZoom);
-
-               var service = getService();
-               var selectedKey = service && service.getSelectedImageKey();
-               var sequences = (service ? service.sequences(projection) : []);
-               var images = (service && showMarkers ? service.images(projection) : []);
-
-               images = filterImages(images);
-               sequences = filterSequences(sequences, service);
-
-               var traces = layer.selectAll('.sequences').selectAll('.sequence')
-                   .data(sequences, function(d) { return d.properties.key; });
-
-               // exit
-               traces.exit()
-                   .remove();
-
-               // enter/update
-               traces = traces.enter()
-                   .append('path')
-                   .attr('class', 'sequence')
-                   .merge(traces)
-                   .attr('d', svgPath(projection).geojson);
-
-
-               var groups = layer.selectAll('.markers').selectAll('.viewfield-group')
-                   .data(images, function(d) { return d.key; });
-
-               // exit
-               groups.exit()
-                   .remove();
-
-               // enter
-               var groupsEnter = groups.enter()
-                   .append('g')
-                   .attr('class', 'viewfield-group')
-                   .on('mouseenter', mouseover)
-                   .on('mouseleave', mouseout)
-                   .on('click', click);
-
-               groupsEnter
-                   .append('g')
-                   .attr('class', 'viewfield-scale');
-
-               // update
-               var markers = groups
-                   .merge(groupsEnter)
-                   .sort(function(a, b) {
-                       return (a.key === selectedKey) ? 1
-                           : (b.key === selectedKey) ? -1
-                           : b.loc[1] - a.loc[1];  // sort Y
-                   })
-                   .attr('transform', transform)
-                   .select('.viewfield-scale');
-
-
-               markers.selectAll('circle')
-                   .data([0])
-                   .enter()
-                   .append('circle')
-                   .attr('dx', '0')
-                   .attr('dy', '0')
-                   .attr('r', '6');
-
-               var viewfields = markers.selectAll('.viewfield')
-                   .data(showViewfields ? [0] : []);
-
-               viewfields.exit()
-                   .remove();
-
-               viewfields.enter()               // viewfields may or may not be drawn...
-                   .insert('path', 'circle')    // but if they are, draw below the circles
-                   .attr('class', 'viewfield')
-                   .classed('pano', function() { return this.parentNode.__data__.pano; })
-                   .attr('transform', 'scale(1.5,1.5),translate(-8, -13)')
-                   .attr('d', viewfieldPath);
-
-               function viewfieldPath() {
-                   var d = this.parentNode.__data__;
-                   if (d.pano) {
-                       return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-                   } else {
-                       return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-                   }
-               }
+           if (svgGeolocate.enabled) {
+             showLayer();
+             layerOn();
+           } else {
+             hideLayer();

            }
 
            }
 

+           return this;
+         };

 
 

-           function drawImages(selection) {
-               var enabled = svgMapillaryImages.enabled;
-               var service = getService();
+         init();
+         return drawLocation;
+       }

 
 

-               layer = selection.selectAll('.layer-mapillary')
-                   .data(service ? [0] : []);
+       function svgLabels(projection, context) {
+         var path = d3_geoPath(projection);
+         var detected = utilDetect();
+         var baselineHack = detected.ie || detected.browser.toLowerCase() === 'edge' || detected.browser.toLowerCase() === 'firefox' && detected.version >= 70;

 
 

-               layer.exit()
-                   .remove();
+         var _rdrawn = new RBush();

 
 

-               var layerEnter = layer.enter()
-                   .append('g')
-                   .attr('class', 'layer-mapillary')
-                   .style('display', enabled ? 'block' : 'none');
+         var _rskipped = new RBush();

 
 

-               layerEnter
-                   .append('g')
-                   .attr('class', 'sequences');
+         var _textWidthCache = {};
+         var _entitybboxes = {}; // Listed from highest to lowest priority

 
 

-               layerEnter
-                   .append('g')
-                   .attr('class', 'markers');
+         var labelStack = [['line', 'aeroway', '*', 12], ['line', 'highway', 'motorway', 12], ['line', 'highway', 'trunk', 12], ['line', 'highway', 'primary', 12], ['line', 'highway', 'secondary', 12], ['line', 'highway', 'tertiary', 12], ['line', 'highway', '*', 12], ['line', 'railway', '*', 12], ['line', 'waterway', '*', 12], ['area', 'aeroway', '*', 12], ['area', 'amenity', '*', 12], ['area', 'building', '*', 12], ['area', 'historic', '*', 12], ['area', 'leisure', '*', 12], ['area', 'man_made', '*', 12], ['area', 'natural', '*', 12], ['area', 'shop', '*', 12], ['area', 'tourism', '*', 12], ['area', 'camp_site', '*', 12], ['point', 'aeroway', '*', 10], ['point', 'amenity', '*', 10], ['point', 'building', '*', 10], ['point', 'historic', '*', 10], ['point', 'leisure', '*', 10], ['point', 'man_made', '*', 10], ['point', 'natural', '*', 10], ['point', 'shop', '*', 10], ['point', 'tourism', '*', 10], ['point', 'camp_site', '*', 10], ['line', 'name', '*', 12], ['area', 'name', '*', 12], ['point', 'name', '*', 10]];

 
 

-               layer = layerEnter
-                   .merge(layer);
+         function shouldSkipIcon(preset) {
+           var noIcons = ['building', 'landuse', 'natural'];
+           return noIcons.some(function (s) {
+             return preset.id.indexOf(s) >= 0;
+           });
+         }

 
 

-               if (enabled) {
-                   if (service && ~~context.map().zoom() >= minZoom) {
-                       editOn();
-                       update();
-                       service.loadImages(projection);
-                   } else {
-                       editOff();
-                   }
-               }
-           }
+         function get(array, prop) {
+           return function (d, i) {
+             return array[i][prop];
+           };
+         }

 
 

+         function textWidth(text, size, elem) {
+           var c = _textWidthCache[size];
+           if (!c) c = _textWidthCache[size] = {};

 
 

-           drawImages.enabled = function(_) {
-               if (!arguments.length) { return svgMapillaryImages.enabled; }
-               svgMapillaryImages.enabled = _;
-               if (svgMapillaryImages.enabled) {
-                   showLayer();
-               } else {
-                   hideLayer();
-               }
-               dispatch.call('change');
-               return this;
-           };
+           if (c[text]) {
+             return c[text];
+           } else if (elem) {
+             c[text] = elem.getComputedTextLength();
+             return c[text];
+           } else {
+             var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);

 
 

+             if (str === null) {
+               return size / 3 * 2 * text.length;
+             } else {
+               return size / 3 * (2 * text.length + str.length);
+             }
+           }
+         }

 
 

-           drawImages.supported = function() {
-               return !!getService();
-           };
+         function drawLinePaths(selection, entities, filter, classes, labels) {
+           var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit

 
 

+           paths.exit().remove(); // enter/update

 
 

-           init();
-           return drawImages;
-       }
+           paths.enter().append('path').style('stroke-width', get(labels, 'font-size')).attr('id', function (d) {
+             return 'ideditor-labelpath-' + d.id;
+           }).attr('class', classes).merge(paths).attr('d', get(labels, 'lineString'));
+         }

 
 

-       function svgMapillarySigns(projection, context, dispatch) {
-           var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-           var minZoom = 12;
-           var layer = select(null);
-           var _mapillary;
+         function drawLineLabels(selection, entities, filter, classes, labels) {
+           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit

 
 

+           texts.exit().remove(); // enter

 
 

-           function init() {
-               if (svgMapillarySigns.initialized) { return; }  // run once
-               svgMapillarySigns.enabled = false;
-               svgMapillarySigns.initialized = true;
-           }
+           texts.enter().append('text').attr('class', function (d, i) {
+             return classes + ' ' + labels[i].classes + ' ' + d.id;
+           }).attr('dy', baselineHack ? '0.35em' : null).append('textPath').attr('class', 'textpath'); // update

 
 

+           selection.selectAll('text.' + classes).selectAll('.textpath').filter(filter).data(entities, osmEntity.key).attr('startOffset', '50%').attr('xlink:href', function (d) {
+             return '#ideditor-labelpath-' + d.id;
+           }).text(utilDisplayNameForPath);
+         }

 
 

-           function getService() {
-               if (services.mapillary && !_mapillary) {
-                   _mapillary = services.mapillary;
-                   _mapillary.event.on('loadedSigns', throttledRedraw);
-               } else if (!services.mapillary && _mapillary) {
-                   _mapillary = null;
-               }
-               return _mapillary;
-           }
+         function drawPointLabels(selection, entities, filter, classes, labels) {
+           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit

 
 

+           texts.exit().remove(); // enter/update

 
 

-           function showLayer() {
-               var service = getService();
-               if (!service) { return; }
+           texts.enter().append('text').attr('class', function (d, i) {
+             return classes + ' ' + labels[i].classes + ' ' + d.id;
+           }).merge(texts).attr('x', get(labels, 'x')).attr('y', get(labels, 'y')).style('text-anchor', get(labels, 'textAnchor')).text(utilDisplayName).each(function (d, i) {
+             textWidth(utilDisplayName(d), labels[i].height, this);
+           });
+         }

 
 

-               editOn();
+         function drawAreaLabels(selection, entities, filter, classes, labels) {
+           entities = entities.filter(hasText);
+           labels = labels.filter(hasText);
+           drawPointLabels(selection, entities, filter, classes, labels);
+
+           function hasText(d, i) {
+             return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');

            }
            }

+         }

 
 

+         function drawAreaIcons(selection, entities, filter, classes, labels) {
+           var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit

 
 

-           function hideLayer() {
-               throttledRedraw.cancel();
-               editOff();
-           }
+           icons.exit().remove(); // enter/update

 
 

+           icons.enter().append('use').attr('class', 'icon ' + classes).attr('width', '17px').attr('height', '17px').merge(icons).attr('transform', get(labels, 'transform')).attr('xlink:href', function (d) {
+             var preset = _mainPresetIndex.match(d, context.graph());
+             var picon = preset && preset.icon;

 
 

-           function editOn() {
-               layer.style('display', 'block');
-           }
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return '#' + picon + (isMaki ? '-15' : '');
+             }
+           });
+         }

 
 

+         function drawCollisionBoxes(selection, rtree, which) {
+           var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
+           var gj = [];

 
 

-           function editOff() {
-               layer.selectAll('.icon-sign').remove();
-               layer.style('display', 'none');
+           if (context.getDebug('collision')) {
+             gj = rtree.all().map(function (d) {
+               return {
+                 type: 'Polygon',
+                 coordinates: [[[d.minX, d.minY], [d.maxX, d.minY], [d.maxX, d.maxY], [d.minX, d.maxY], [d.minX, d.minY]]]
+               };
+             });

            }
 
            }
 

+           var boxes = selection.selectAll('.' + which).data(gj); // exit

 
 

-           function click(d) {
-               var service = getService();
-               if (!service) { return; }
+           boxes.exit().remove(); // enter/update

 
 

-               context.map().centerEase(d.loc);
-
-               var selectedImageKey = service.getSelectedImageKey();
-               var imageKey;
+           boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
+         }

 
 

-               // Pick one of the images the sign was detected in,
-               // preference given to an image already selected.
-               d.detections.forEach(function(detection) {
-                   if (!imageKey || selectedImageKey === detection.image_key) {
-                       imageKey = detection.image_key;
-                   }
-               });
+         function drawLabels(selection, graph, entities, filter, dimensions, fullRedraw) {
+           var wireframe = context.surface().classed('fill-wireframe');
+           var zoom = geoScaleToZoom(projection.scale());
+           var labelable = [];
+           var renderNodeAs = {};
+           var i, j, k, entity, geometry;

 
 

-               service
-                   .selectImage(context, imageKey)
-                   .updateViewer(context, imageKey)
-                   .showViewer(context);
+           for (i = 0; i < labelStack.length; i++) {
+             labelable.push([]);

            }
 
            }
 

+           if (fullRedraw) {
+             _rdrawn.clear();

 
 

-           function update() {
-               var service = getService();
-               var data = (service ? service.signs(projection) : []);
-               var selectedImageKey = service.getSelectedImageKey();
-               var transform = svgPointTransform(projection);
-
-               var signs = layer.selectAll('.icon-sign')
-                   .data(data, function(d) { return d.key; });
-
-               // exit
-               signs.exit()
-                   .remove();
-
-               // enter
-               var enter = signs.enter()
-                   .append('g')
-                   .attr('class', 'icon-sign icon-detected')
-                   .on('click', click);
-
-               enter
-                   .append('use')
-                   .attr('width', '24px')
-                   .attr('height', '24px')
-                   .attr('x', '-12px')
-                   .attr('y', '-12px')
-                   .attr('xlink:href', function(d) { return '#' + d.value; });
-
-               enter
-                   .append('rect')
-                   .attr('width', '24px')
-                   .attr('height', '24px')
-                   .attr('x', '-12px')
-                   .attr('y', '-12px');
-
-               // update
-               signs
-                   .merge(enter)
-                   .attr('transform', transform)
-                   .classed('currentView', function(d) {
-                       return d.detections.some(function(detection) {
-                           return detection.image_key === selectedImageKey;
-                       });
-                   })
-                   .sort(function(a, b) {
-                       var aSelected = a.detections.some(function(detection) {
-                           return detection.image_key === selectedImageKey;
-                       });
-                       var bSelected = b.detections.some(function(detection) {
-                           return detection.image_key === selectedImageKey;
-                       });
-                       if (aSelected === bSelected) {
-                           return b.loc[1] - a.loc[1]; // sort Y
-                       } else if (aSelected) {
-                           return 1;
-                       }
-                       return -1;
-                   });
-           }
-
+             _rskipped.clear();

 
 

-           function drawSigns(selection) {
-               var enabled = svgMapillarySigns.enabled;
-               var service = getService();
+             _entitybboxes = {};
+           } else {
+             for (i = 0; i < entities.length; i++) {
+               entity = entities[i];
+               var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);

 
 

-               layer = selection.selectAll('.layer-mapillary-signs')
-                   .data(service ? [0] : []);
+               for (j = 0; j < toRemove.length; j++) {
+                 _rdrawn.remove(toRemove[j]);

 
 

-               layer.exit()
-                   .remove();
+                 _rskipped.remove(toRemove[j]);
+               }
+             }
+           } // Loop through all the entities to do some preprocessing

 
 

-               layer = layer.enter()
-                   .append('g')
-                   .attr('class', 'layer-mapillary-signs layer-mapillary-detections')
-                   .style('display', enabled ? 'block' : 'none')
-                   .merge(layer);

 
 

-               if (enabled) {
-                   if (service && ~~context.map().zoom() >= minZoom) {
-                       editOn();
-                       update();
-                       service.loadSigns(projection);
-                   } else {
-                       editOff();
-                   }
-               }
-           }
+           for (i = 0; i < entities.length; i++) {
+             entity = entities[i];
+             geometry = entity.geometry(graph); // Insert collision boxes around interesting points/vertices

 
 

+             if (geometry === 'point' || geometry === 'vertex' && isInterestingVertex(entity)) {
+               var hasDirections = entity.directions(graph, projection).length;
+               var markerPadding;

 
 

-           drawSigns.enabled = function(_) {
-               if (!arguments.length) { return svgMapillarySigns.enabled; }
-               svgMapillarySigns.enabled = _;
-               if (svgMapillarySigns.enabled) {
-                   showLayer();
+               if (!wireframe && geometry === 'point' && !(zoom >= 18 && hasDirections)) {
+                 renderNodeAs[entity.id] = 'point';
+                 markerPadding = 20; // extra y for marker height

                } else {
                } else {

-                   hideLayer();
+                 renderNodeAs[entity.id] = 'vertex';
+                 markerPadding = 0;

                }
                }

-               dispatch.call('change');
-               return this;
-           };

 
 

+               var coord = projection(entity.loc);
+               var nodePadding = 10;
+               var bbox = {
+                 minX: coord[0] - nodePadding,
+                 minY: coord[1] - nodePadding - markerPadding,
+                 maxX: coord[0] + nodePadding,
+                 maxY: coord[1] + nodePadding
+               };
+               doInsert(bbox, entity.id + 'P');
+             } // From here on, treat vertices like points

 
 

-           drawSigns.supported = function() {
-               return !!getService();
-           };

 
 

+             if (geometry === 'vertex') {
+               geometry = 'point';
+             } // Determine which entities are label-able

 
 

-           init();
-           return drawSigns;
-       }

 
 

-       function svgMapillaryMapFeatures(projection, context, dispatch) {
-           var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-           var minZoom = 12;
-           var layer = select(null);
-           var _mapillary;
+             var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
+             var icon = preset && !shouldSkipIcon(preset) && preset.icon;
+             if (!icon && !utilDisplayName(entity)) continue;

 
 

+             for (k = 0; k < labelStack.length; k++) {
+               var matchGeom = labelStack[k][0];
+               var matchKey = labelStack[k][1];
+               var matchVal = labelStack[k][2];
+               var hasVal = entity.tags[matchKey];

 
 

-           function init() {
-               if (svgMapillaryMapFeatures.initialized) { return; }  // run once
-               svgMapillaryMapFeatures.enabled = false;
-               svgMapillaryMapFeatures.initialized = true;
+               if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
+                 labelable[k].push(entity);
+                 break;
+               }
+             }

            }
 
            }
 

+           var positions = {
+             point: [],
+             line: [],
+             area: []
+           };
+           var labelled = {
+             point: [],
+             line: [],
+             area: []
+           }; // Try and find a valid label for labellable entities
+
+           for (k = 0; k < labelable.length; k++) {
+             var fontSize = labelStack[k][3];

 
 

-           function getService() {
-               if (services.mapillary && !_mapillary) {
-                   _mapillary = services.mapillary;
-                   _mapillary.event.on('loadedMapFeatures', throttledRedraw);
-               } else if (!services.mapillary && _mapillary) {
-                   _mapillary = null;
+             for (i = 0; i < labelable[k].length; i++) {
+               entity = labelable[k][i];
+               geometry = entity.geometry(graph);
+               var getName = geometry === 'line' ? utilDisplayNameForPath : utilDisplayName;
+               var name = getName(entity);
+               var width = name && textWidth(name, fontSize);
+               var p = null;
+
+               if (geometry === 'point' || geometry === 'vertex') {
+                 // no point or vertex labels in wireframe mode
+                 // no vertex labels at low zooms (vertices have no icons)
+                 if (wireframe) continue;
+                 var renderAs = renderNodeAs[entity.id];
+                 if (renderAs === 'vertex' && zoom < 17) continue;
+                 p = getPointLabel(entity, width, fontSize, renderAs);
+               } else if (geometry === 'line') {
+                 p = getLineLabel(entity, width, fontSize);
+               } else if (geometry === 'area') {
+                 p = getAreaLabel(entity, width, fontSize);

                }
                }

-               return _mapillary;
-           }

 
 

+               if (p) {
+                 if (geometry === 'vertex') {
+                   geometry = 'point';
+                 } // treat vertex like point

 
 

-           function showLayer() {
-               var service = getService();
-               if (!service) { return; }

 
 

-               editOn();
+                 p.classes = geometry + ' tag-' + labelStack[k][1];
+                 positions[geometry].push(p);
+                 labelled[geometry].push(entity);
+               }
+             }

            }
 
            }
 

-
-           function hideLayer() {
-               throttledRedraw.cancel();
-               editOff();
+           function isInterestingVertex(entity) {
+             var selectedIDs = context.selectedIDs();
+             return entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || selectedIDs.indexOf(entity.id) !== -1 || graph.parentWays(entity).some(function (parent) {
+               return selectedIDs.indexOf(parent.id) !== -1;
+             });

            }
 
            }
 

+           function getPointLabel(entity, width, height, geometry) {
+             var y = geometry === 'point' ? -12 : 0;
+             var pointOffsets = {
+               ltr: [15, y, 'start'],
+               rtl: [-15, y, 'end']
+             };
+             var textDirection = _mainLocalizer.textDirection();
+             var coord = projection(entity.loc);
+             var textPadding = 2;
+             var offset = pointOffsets[textDirection];
+             var p = {
+               height: height,
+               width: width,
+               x: coord[0] + offset[0],
+               y: coord[1] + offset[1],
+               textAnchor: offset[2]
+             }; // insert a collision box for the text label..
+
+             var bbox;
+
+             if (textDirection === 'rtl') {
+               bbox = {
+                 minX: p.x - width - textPadding,
+                 minY: p.y - height / 2 - textPadding,
+                 maxX: p.x + textPadding,
+                 maxY: p.y + height / 2 + textPadding
+               };
+             } else {
+               bbox = {
+                 minX: p.x - textPadding,
+                 minY: p.y - height / 2 - textPadding,
+                 maxX: p.x + width + textPadding,
+                 maxY: p.y + height / 2 + textPadding
+               };
+             }

 
 

-           function editOn() {
-               layer.style('display', 'block');
+             if (tryInsert([bbox], entity.id, true)) {
+               return p;
+             }

            }
 
            }
 

+           function getLineLabel(entity, width, height) {
+             var viewport = geoExtent(context.projection.clipExtent()).polygon();
+             var points = graph.childNodes(entity).map(function (node) {
+               return projection(node.loc);
+             });
+             var length = geoPathLength(points);
+             if (length < width + 20) return; // % along the line to attempt to place the label

 
 

-           function editOff() {
-               layer.selectAll('.icon-map-feature').remove();
-               layer.style('display', 'none');
-           }
+             var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70, 25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
+             var padding = 3;

 
 

+             for (var i = 0; i < lineOffsets.length; i++) {
+               var offset = lineOffsets[i];
+               var middle = offset / 100 * length;
+               var start = middle - width / 2;
+               if (start < 0 || start + width > length) continue; // generate subpath and ignore paths that are invalid or don't cross viewport.

 
 

-           function click(d) {
-               var service = getService();
-               if (!service) { return; }
+               var sub = subpath(points, start, start + width);

 
 

-               context.map().centerEase(d.loc);
+               if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
+                 continue;
+               }

 
 

-               var selectedImageKey = service.getSelectedImageKey();
-               var imageKey;
+               var isReverse = reverse(sub);

 
 

-               // Pick one of the images the map feature was detected in,
-               // preference given to an image already selected.
-               d.detections.forEach(function(detection) {
-                   if (!imageKey || selectedImageKey === detection.image_key) {
-                       imageKey = detection.image_key;
-                   }
-               });
+               if (isReverse) {
+                 sub = sub.reverse();
+               }

 
 

-               service
-                   .selectImage(context, imageKey)
-                   .updateViewer(context, imageKey)
-                   .showViewer(context);
-           }
+               var bboxes = [];
+               var boxsize = (height + 2) / 2;

 
 

+               for (var j = 0; j < sub.length - 1; j++) {
+                 var a = sub[j];
+                 var b = sub[j + 1]; // split up the text into small collision boxes

 
 

-           function update() {
-               var service = getService();
-               var data = (service ? service.mapFeatures(projection) : []);
-               var selectedImageKey = service && service.getSelectedImageKey();
-               var transform = svgPointTransform(projection);
-
-               var mapFeatures = layer.selectAll('.icon-map-feature')
-                   .data(data, function(d) { return d.key; });
-
-               // exit
-               mapFeatures.exit()
-                   .remove();
-
-               // enter
-               var enter = mapFeatures.enter()
-                   .append('g')
-                   .attr('class', 'icon-map-feature icon-detected')
-                   .on('click', click);
-
-               enter
-                   .append('title')
-                   .text(function(d) {
-                       var id = d.value.replace(/--/g, '.').replace(/-/g, '_');
-                       return _t('mapillary_map_features.' + id);
-                   });
+                 var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));

 
 

-               enter
-                   .append('use')
-                   .attr('width', '24px')
-                   .attr('height', '24px')
-                   .attr('x', '-12px')
-                   .attr('y', '-12px')
-                   .attr('xlink:href', function(d) {
-                       if (d.value === 'object--billboard') {
-                           // no billboard icon right now, so use the advertisement icon
-                           return '#object--sign--advertisement';
-                       }
-                       return '#' + d.value;
+                 for (var box = 0; box < num; box++) {
+                   var p = geoVecInterp(a, b, box / num);
+                   var x0 = p[0] - boxsize - padding;
+                   var y0 = p[1] - boxsize - padding;
+                   var x1 = p[0] + boxsize + padding;
+                   var y1 = p[1] + boxsize + padding;
+                   bboxes.push({
+                     minX: Math.min(x0, x1),
+                     minY: Math.min(y0, y1),
+                     maxX: Math.max(x0, x1),
+                     maxY: Math.max(y0, y1)

                    });
                    });

+                 }
+               }

 
 

-               enter
-                   .append('rect')
-                   .attr('width', '24px')
-                   .attr('height', '24px')
-                   .attr('x', '-12px')
-                   .attr('y', '-12px');
-
-               // update
-               mapFeatures
-                   .merge(enter)
-                   .attr('transform', transform)
-                   .classed('currentView', function(d) {
-                       return d.detections.some(function(detection) {
-                           return detection.image_key === selectedImageKey;
-                       });
-                   })
-                   .sort(function(a, b) {
-                       var aSelected = a.detections.some(function(detection) {
-                           return detection.image_key === selectedImageKey;
-                       });
-                       var bSelected = b.detections.some(function(detection) {
-                           return detection.image_key === selectedImageKey;
-                       });
-                       if (aSelected === bSelected) {
-                           return b.loc[1] - a.loc[1]; // sort Y
-                       } else if (aSelected) {
-                           return 1;
-                       }
-                       return -1;
-                   });
-           }
+               if (tryInsert(bboxes, entity.id, false)) {
+                 // accept this one
+                 return {
+                   'font-size': height + 2,
+                   lineString: lineString(sub),
+                   startOffset: offset + '%'
+                 };
+               }
+             }
+
+             function reverse(p) {
+               var angle = Math.atan2(p[1][1] - p[0][1], p[1][0] - p[0][0]);
+               return !(p[0][0] < p[p.length - 1][0] && angle < Math.PI / 2 && angle > -Math.PI / 2);
+             }

 
 

+             function lineString(points) {
+               return 'M' + points.join('L');
+             }

 
 

-           function drawMapFeatures(selection) {
-               var enabled = svgMapillaryMapFeatures.enabled;
-               var service = getService();
+             function subpath(points, from, to) {
+               var sofar = 0;
+               var start, end, i0, i1;

 
 

-               layer = selection.selectAll('.layer-mapillary-map-features')
-                   .data(service ? [0] : []);
+               for (var i = 0; i < points.length - 1; i++) {
+                 var a = points[i];
+                 var b = points[i + 1];
+                 var current = geoVecLength(a, b);
+                 var portion;

 
 

-               layer.exit()
-                   .remove();
+                 if (!start && sofar + current >= from) {
+                   portion = (from - sofar) / current;
+                   start = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
+                   i0 = i + 1;
+                 }

 
 

-               layer = layer.enter()
-                   .append('g')
-                   .attr('class', 'layer-mapillary-map-features layer-mapillary-detections')
-                   .style('display', enabled ? 'block' : 'none')
-                   .merge(layer);
+                 if (!end && sofar + current >= to) {
+                   portion = (to - sofar) / current;
+                   end = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
+                   i1 = i + 1;
+                 }

 
 

-               if (enabled) {
-                   if (service && ~~context.map().zoom() >= minZoom) {
-                       editOn();
-                       update();
-                       service.loadMapFeatures(projection);
-                   } else {
-                       editOff();
-                   }
+                 sofar += current;

                }
                }

+
+               var result = points.slice(i0, i1);
+               result.unshift(start);
+               result.push(end);
+               return result;
+             }

            }
 
            }
 

+           function getAreaLabel(entity, width, height) {
+             var centroid = path.centroid(entity.asGeoJSON(graph));
+             var extent = entity.extent(graph);
+             var areaWidth = projection(extent[1])[0] - projection(extent[0])[0];
+             if (isNaN(centroid[0]) || areaWidth < 20) return;
+             var preset = _mainPresetIndex.match(entity, context.graph());
+             var picon = preset && preset.icon;
+             var iconSize = 17;
+             var padding = 2;
+             var p = {};

 
 

-           drawMapFeatures.enabled = function(_) {
-               if (!arguments.length) { return svgMapillaryMapFeatures.enabled; }
-               svgMapillaryMapFeatures.enabled = _;
-               if (svgMapillaryMapFeatures.enabled) {
-                   showLayer();
-               } else {
-                   hideLayer();
+             if (picon) {
+               // icon and label..
+               if (addIcon()) {
+                 addLabel(iconSize + padding);
+                 return p;

                }
                }

-               dispatch.call('change');
-               return this;
-           };
+             } else {
+               // label only..
+               if (addLabel(0)) {
+                 return p;
+               }
+             }

 
 

+             function addIcon() {
+               var iconX = centroid[0] - iconSize / 2;
+               var iconY = centroid[1] - iconSize / 2;
+               var bbox = {
+                 minX: iconX,
+                 minY: iconY,
+                 maxX: iconX + iconSize,
+                 maxY: iconY + iconSize
+               };

 
 

-           drawMapFeatures.supported = function() {
-               return !!getService();
-           };
+               if (tryInsert([bbox], entity.id + 'I', true)) {
+                 p.transform = 'translate(' + iconX + ',' + iconY + ')';
+                 return true;
+               }
+
+               return false;
+             }

 
 

+             function addLabel(yOffset) {
+               if (width && areaWidth >= width + 20) {
+                 var labelX = centroid[0];
+                 var labelY = centroid[1] + yOffset;
+                 var bbox = {
+                   minX: labelX - width / 2 - padding,
+                   minY: labelY - height / 2 - padding,
+                   maxX: labelX + width / 2 + padding,
+                   maxY: labelY + height / 2 + padding
+                 };

 
 

-           init();
-           return drawMapFeatures;
-       }
+                 if (tryInsert([bbox], entity.id, true)) {
+                   p.x = labelX;
+                   p.y = labelY;
+                   p.textAnchor = 'middle';
+                   p.height = height;
+                   return true;
+                 }
+               }

 
 

-       function svgOpenstreetcamImages(projection, context, dispatch) {
-           var throttledRedraw = throttle(function () { dispatch.call('change'); }, 1000);
-           var minZoom = 12;
-           var minMarkerZoom = 16;
-           var minViewfieldZoom = 18;
-           var layer = select(null);
-           var _openstreetcam;
+               return false;
+             }
+           } // force insert a singular bounding box
+           // singular box only, no array, id better be unique

 
 
 
 

-           function init() {
-               if (svgOpenstreetcamImages.initialized) { return; }  // run once
-               svgOpenstreetcamImages.enabled = false;
-               svgOpenstreetcamImages.initialized = true;
-           }
+           function doInsert(bbox, id) {
+             bbox.id = id;
+             var oldbox = _entitybboxes[id];

 
 

+             if (oldbox) {
+               _rdrawn.remove(oldbox);
+             }

 
 

-           function getService() {
-               if (services.openstreetcam && !_openstreetcam) {
-                   _openstreetcam = services.openstreetcam;
-                   _openstreetcam.event.on('loadedImages', throttledRedraw);
-               } else if (!services.openstreetcam && _openstreetcam) {
-                   _openstreetcam = null;
-               }
+             _entitybboxes[id] = bbox;

 
 

-               return _openstreetcam;
+             _rdrawn.insert(bbox);

            }
 
            }
 

+           function tryInsert(bboxes, id, saveSkipped) {
+             var skipped = false;

 
 

-           function showLayer() {
-               var service = getService();
-               if (!service) { return; }
+             for (var i = 0; i < bboxes.length; i++) {
+               var bbox = bboxes[i];
+               bbox.id = id; // Check that label is visible

 
 

-               editOn();
+               if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
+                 skipped = true;
+                 break;
+               }

 
 

-               layer
-                   .style('opacity', 0)
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 1)
-                   .on('end', function () { dispatch.call('change'); });
-           }
+               if (_rdrawn.collides(bbox)) {
+                 skipped = true;
+                 break;
+               }
+             }

 
 

+             _entitybboxes[id] = bboxes;

 
 

-           function hideLayer() {
-               throttledRedraw.cancel();
+             if (skipped) {
+               if (saveSkipped) {
+                 _rskipped.load(bboxes);
+               }
+             } else {
+               _rdrawn.load(bboxes);
+             }

 
 

-               layer
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 0)
-                   .on('end', editOff);
+             return !skipped;

            }
 
            }
 

+           var layer = selection.selectAll('.layer-osm.labels');
+           layer.selectAll('.labels-group').data(['halo', 'label', 'debug']).enter().append('g').attr('class', function (d) {
+             return 'labels-group ' + d;
+           });
+           var halo = layer.selectAll('.labels-group.halo');
+           var label = layer.selectAll('.labels-group.label');
+           var debug = layer.selectAll('.labels-group.debug'); // points

 
 

-           function editOn() {
-               layer.style('display', 'block');
-           }
-
+           drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
+           drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines

 
 

-           function editOff() {
-               layer.selectAll('.viewfield-group').remove();
-               layer.style('display', 'none');
-           }
+           drawLinePaths(layer, labelled.line, filter, '', positions.line);
+           drawLineLabels(label, labelled.line, filter, 'linelabel', positions.line);
+           drawLineLabels(halo, labelled.line, filter, 'linelabel-halo', positions.line); // areas

 
 

+           drawAreaLabels(label, labelled.area, filter, 'arealabel', positions.area);
+           drawAreaLabels(halo, labelled.area, filter, 'arealabel-halo', positions.area);
+           drawAreaIcons(label, labelled.area, filter, 'areaicon', positions.area);
+           drawAreaIcons(halo, labelled.area, filter, 'areaicon-halo', positions.area); // debug

 
 

-           function click(d) {
-               var service = getService();
-               if (!service) { return; }
+           drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
+           drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
+           layer.call(filterLabels);
+         }

 
 

-               service
-                   .selectImage(context, d)
-                   .updateViewer(context, d)
-                   .showViewer(context);
+         function filterLabels(selection) {
+           var drawLayer = selection.selectAll('.layer-osm.labels');
+           var layers = drawLayer.selectAll('.labels-group.halo, .labels-group.label');
+           layers.selectAll('.nolabel').classed('nolabel', false);
+           var mouse = context.map().mouse();
+           var graph = context.graph();
+           var selectedIDs = context.selectedIDs();
+           var ids = [];
+           var pad, bbox; // hide labels near the mouse
+
+           if (mouse) {
+             pad = 20;
+             bbox = {
+               minX: mouse[0] - pad,
+               minY: mouse[1] - pad,
+               maxX: mouse[0] + pad,
+               maxY: mouse[1] + pad
+             };

 
 

-               context.map().centerEase(d.loc);
-           }
+             var nearMouse = _rdrawn.search(bbox).map(function (entity) {
+               return entity.id;
+             });

 
 

+             ids.push.apply(ids, nearMouse);
+           } // hide labels on selected nodes (they look weird when dragging / haloed)

 
 

-           function mouseover(d) {
-               var service = getService();
-               if (service) { service.setStyles(context, d); }
-           }

 
 

+           for (var i = 0; i < selectedIDs.length; i++) {
+             var entity = graph.hasEntity(selectedIDs[i]);

 
 

-           function mouseout() {
-               var service = getService();
-               if (service) { service.setStyles(context, null); }
+             if (entity && entity.type === 'node') {
+               ids.push(selectedIDs[i]);
+             }

            }
 
            }
 

+           layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..

 
 

-           function transform(d) {
-               var t = svgPointTransform(projection)(d);
-               if (d.ca) {
-                   t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
-               }
-               return t;
-           }
+           var debug = selection.selectAll('.labels-group.debug');
+           var gj = [];

 
 

+           if (context.getDebug('collision')) {
+             gj = bbox ? [{
+               type: 'Polygon',
+               coordinates: [[[bbox.minX, bbox.minY], [bbox.maxX, bbox.minY], [bbox.maxX, bbox.maxY], [bbox.minX, bbox.maxY], [bbox.minX, bbox.minY]]]
+             }] : [];
+           }

 
 

-           context.photos().on('change.openstreetcam_images', update);
+           var box = debug.selectAll('.debug-mouse').data(gj); // exit

 
 

-           function update() {
-               var viewer = context.container().select('.photoviewer');
-               var selected = viewer.empty() ? undefined : viewer.datum();
+           box.exit().remove(); // enter/update

 
 

-               var z = ~~context.map().zoom();
-               var showMarkers = (z >= minMarkerZoom);
-               var showViewfields = (z >= minViewfieldZoom);
+           box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
+         }

 
 

-               var service = getService();
-               var sequences = [];
-               var images = [];
+         var throttleFilterLabels = throttle(filterLabels, 100);

 
 

-               if (context.photos().showsFlat()) {
-                   sequences = (service ? service.sequences(projection) : []);
-                   images = (service && showMarkers ? service.images(projection) : []);
-               }
+         drawLabels.observe = function (selection) {
+           var listener = function listener() {
+             throttleFilterLabels(selection);
+           };

 
 

-               var traces = layer.selectAll('.sequences').selectAll('.sequence')
-                   .data(sequences, function(d) { return d.properties.key; });
+           selection.on('mousemove.hidelabels', listener);
+           context.on('enter.hidelabels', listener);
+         };

 
 

-               // exit
-               traces.exit()
-                   .remove();
+         drawLabels.off = function (selection) {
+           throttleFilterLabels.cancel();
+           selection.on('mousemove.hidelabels', null);
+           context.on('enter.hidelabels', null);
+         };

 
 

-               // enter/update
-               traces = traces.enter()
-                   .append('path')
-                   .attr('class', 'sequence')
-                   .merge(traces)
-                   .attr('d', svgPath(projection).geojson);
+         return drawLabels;
+       }

 
 

+       var _layerEnabled$1 = false;

 
 

-               var groups = layer.selectAll('.markers').selectAll('.viewfield-group')
-                   .data(images, function(d) { return d.key; });
+       var _qaService$1;

 
 

-               // exit
-               groups.exit()
-                   .remove();
+       function svgImproveOSM(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           return dispatch.call('change');
+         }, 1000);

 
 

-               // enter
-               var groupsEnter = groups.enter()
-                   .append('g')
-                   .attr('class', 'viewfield-group')
-                   .on('mouseenter', mouseover)
-                   .on('mouseleave', mouseout)
-                   .on('click', click);
+         var minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var layerVisible = false;

 
 

-               groupsEnter
-                   .append('g')
-                   .attr('class', 'viewfield-scale');
+         function markerPath(selection, klass) {
+           selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+         } // Loosely-coupled improveOSM service for fetching issues

 
 

-               // update
-               var markers = groups
-                   .merge(groupsEnter)
-                   .sort(function(a, b) {
-                       return (a === selected) ? 1
-                           : (b === selected) ? -1
-                           : b.loc[1] - a.loc[1];  // sort Y
-                   })
-                   .attr('transform', transform)
-                   .select('.viewfield-scale');

 
 

+         function getService() {
+           if (services.improveOSM && !_qaService$1) {
+             _qaService$1 = services.improveOSM;

 
 

-               markers.selectAll('circle')
-                   .data([0])
-                   .enter()
-                   .append('circle')
-                   .attr('dx', '0')
-                   .attr('dy', '0')
-                   .attr('r', '6');
+             _qaService$1.on('loaded', throttledRedraw);
+           } else if (!services.improveOSM && _qaService$1) {
+             _qaService$1 = null;
+           }

 
 

-               var viewfields = markers.selectAll('.viewfield')
-                   .data(showViewfields ? [0] : []);
+           return _qaService$1;
+         } // Show the markers

 
 

-               viewfields.exit()
-                   .remove();

 
 

-               viewfields.enter()               // viewfields may or may not be drawn...
-                   .insert('path', 'circle')    // but if they are, draw below the circles
-                   .attr('class', 'viewfield')
-                   .attr('transform', 'scale(1.5,1.5),translate(-8, -13)')
-                   .attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
+         function editOn() {
+           if (!layerVisible) {
+             layerVisible = true;
+             drawLayer.style('display', 'block');

            }
            }

+         } // Immediately remove the markers and their touch targets

 
 
 
 

-           function drawImages(selection) {
-               var enabled = svgOpenstreetcamImages.enabled,
-                   service = getService();
-
-               layer = selection.selectAll('.layer-openstreetcam')
-                   .data(service ? [0] : []);
-
-               layer.exit()
-                   .remove();
+         function editOff() {
+           if (layerVisible) {
+             layerVisible = false;
+             drawLayer.style('display', 'none');
+             drawLayer.selectAll('.qaItem.improveOSM').remove();
+             touchLayer.selectAll('.qaItem.improveOSM').remove();
+           }
+         } // Enable the layer.  This shows the markers and transitions them to visible.

 
 

-               var layerEnter = layer.enter()
-                   .append('g')
-                   .attr('class', 'layer-openstreetcam')
-                   .style('display', enabled ? 'block' : 'none');

 
 

-               layerEnter
-                   .append('g')
-                   .attr('class', 'sequences');
+         function layerOn() {
+           editOn();
+           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+             return dispatch.call('change');
+           });
+         } // Disable the layer.  This transitions the layer invisible and then hides the markers.

 
 

-               layerEnter
-                   .append('g')
-                   .attr('class', 'markers');

 
 

-               layer = layerEnter
-                   .merge(layer);
+         function layerOff() {
+           throttledRedraw.cancel();
+           drawLayer.interrupt();
+           touchLayer.selectAll('.qaItem.improveOSM').remove();
+           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+             editOff();
+             dispatch.call('change');
+           });
+         } // Update the issue markers

 
 

-               if (enabled) {
-                   if (service && ~~context.map().zoom() >= minZoom) {
-                       editOn();
-                       update();
-                       service.loadImages(projection);
-                   } else {
-                       editOff();
-                   }
-               }
-           }

 
 

+         function updateMarkers() {
+           if (!layerVisible || !_layerEnabled$1) return;
+           var service = getService();
+           var selectedID = context.selectedErrorID();
+           var data = service ? service.getItems(projection) : [];
+           var getTransform = svgPointTransform(projection); // Draw markers..

 
 

-           drawImages.enabled = function(_) {
-               if (!arguments.length) { return svgOpenstreetcamImages.enabled; }
-               svgOpenstreetcamImages.enabled = _;
-               if (svgOpenstreetcamImages.enabled) {
-                   showLayer();
-               } else {
-                   hideLayer();
-               }
-               dispatch.call('change');
-               return this;
-           };
+           var markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+             return d.id;
+           }); // exit

 
 

+           markers.exit().remove(); // enter

 
 

-           drawImages.supported = function() {
-               return !!getService();
-           };
+           var markersEnter = markers.enter().append('g').attr('class', function (d) {
+             return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+           });
+           markersEnter.append('polygon').call(markerPath, 'shadow');
+           markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
+           markersEnter.append('polygon').attr('fill', 'currentColor').call(markerPath, 'qaItem-fill');
+           markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
+             var picon = d.icon;

 
 

+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return "#".concat(picon).concat(isMaki ? '-11' : '');
+             }
+           }); // update

 
 

-           init();
-           return drawImages;
-       }
+           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+             return d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..

 
 

-       function svgOsm(projection, context, dispatch) {
-           var enabled = true;
+           if (touchLayer.empty()) return;
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var targets = touchLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+             return d.id;
+           }); // exit

 
 

+           targets.exit().remove(); // enter/update

 
 

-           function drawOsm(selection) {
-               selection.selectAll('.layer-osm')
-                   .data(['covered', 'areas', 'lines', 'points', 'labels'])
-                   .enter()
-                   .append('g')
-                   .attr('class', function(d) { return 'layer-osm ' + d; });
+           targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
+             return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+           }).attr('transform', getTransform);

 
 

-               selection.selectAll('.layer-osm.points').selectAll('.points-group')
-                   .data(['points', 'midpoints', 'vertices', 'turns'])
-                   .enter()
-                   .append('g')
-                   .attr('class', function(d) { return 'points-group ' + d; });
+           function sortY(a, b) {
+             return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];

            }
            }

+         } // Draw the ImproveOSM layer and schedule loading issues and updating markers.

 
 
 
 

-           function showLayer() {
-               var layer = context.surface().selectAll('.data-layer.osm');
-               layer.interrupt();
+         function drawImproveOSM(selection) {
+           var service = getService();
+           var surface = context.surface();

 
 

-               layer
-                   .classed('disabled', false)
-                   .style('opacity', 0)
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 1)
-                   .on('end interrupt', function () {
-                       dispatch.call('change');
-                   });
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');

            }
 
            }
 

+           drawLayer = selection.selectAll('.layer-improveOSM').data(service ? [0] : []);
+           drawLayer.exit().remove();
+           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-improveOSM').style('display', _layerEnabled$1 ? 'block' : 'none').merge(drawLayer);

 
 

-           function hideLayer() {
-               var layer = context.surface().selectAll('.data-layer.osm');
-               layer.interrupt();
-
-               layer
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 0)
-                   .on('end interrupt', function () {
-                       layer.classed('disabled', true);
-                       dispatch.call('change');
-                   });
+           if (_layerEnabled$1) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadIssues(projection);
+               updateMarkers();
+             } else {
+               editOff();
+             }

            }
            }

+         } // Toggles the layer on and off

 
 
 
 

-           drawOsm.enabled = function(val) {
-               if (!arguments.length) { return enabled; }
-               enabled = val;
-
-               if (enabled) {
-                   showLayer();
-               } else {
-                   hideLayer();
-               }
-
-               dispatch.call('change');
-               return this;
-           };
-
+         drawImproveOSM.enabled = function (val) {
+           if (!arguments.length) return _layerEnabled$1;
+           _layerEnabled$1 = val;

 
 

-           return drawOsm;
-       }
+           if (_layerEnabled$1) {
+             layerOn();
+           } else {
+             layerOff();

 
 

-       var _notesEnabled = false;
-       var _osmService;
+             if (context.selectedErrorID()) {
+               context.enter(modeBrowse(context));
+             }
+           }

 
 

+           dispatch.call('change');
+           return this;
+         };

 
 

-       function svgNotes(projection, context, dispatch$1) {
-           if (!dispatch$1) { dispatch$1 = dispatch('change'); }
-           var throttledRedraw = throttle(function () { dispatch$1.call('change'); }, 1000);
-           var minZoom = 12;
-           var touchLayer = select(null);
-           var drawLayer = select(null);
-           var _notesVisible = false;
+         drawImproveOSM.supported = function () {
+           return !!getService();
+         };

 
 

+         return drawImproveOSM;
+       }

 
 

-           function markerPath(selection, klass) {
-               selection
-                   .attr('class', klass)
-                   .attr('transform', 'translate(-8, -22)')
-                   .attr('d', 'm17.5,0l-15,0c-1.37,0 -2.5,1.12 -2.5,2.5l0,11.25c0,1.37 1.12,2.5 2.5,2.5l3.75,0l0,3.28c0,0.38 0.43,0.6 0.75,0.37l4.87,-3.65l5.62,0c1.37,0 2.5,-1.12 2.5,-2.5l0,-11.25c0,-1.37 -1.12,-2.5 -2.5,-2.5z');
-           }
+       var _layerEnabled = false;

 
 

+       var _qaService;

 
 

-           // Loosely-coupled osm service for fetching notes.
-           function getService() {
-               if (services.osm && !_osmService) {
-                   _osmService = services.osm;
-                   _osmService.on('loadedNotes', throttledRedraw);
-               } else if (!services.osm && _osmService) {
-                   _osmService = null;
-               }
+       function svgOsmose(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           return dispatch.call('change');
+         }, 1000);

 
 

-               return _osmService;
-           }
+         var minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var layerVisible = false;

 
 

+         function markerPath(selection, klass) {
+           selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+         } // Loosely-coupled osmose service for fetching issues

 
 

-           // Show the notes
-           function editOn() {
-               if (!_notesVisible) {
-                   _notesVisible = true;
-                   drawLayer
-                       .style('display', 'block');
-               }
-           }

 
 

+         function getService() {
+           if (services.osmose && !_qaService) {
+             _qaService = services.osmose;

 
 

-           // Immediately remove the notes and their touch targets
-           function editOff() {
-               if (_notesVisible) {
-                   _notesVisible = false;
-                   drawLayer
-                       .style('display', 'none');
-                   drawLayer.selectAll('.note')
-                       .remove();
-                   touchLayer.selectAll('.note')
-                       .remove();
-               }
+             _qaService.on('loaded', throttledRedraw);
+           } else if (!services.osmose && _qaService) {
+             _qaService = null;

            }
 
            }
 

+           return _qaService;
+         } // Show the markers

 
 

-           // Enable the layer.  This shows the notes and transitions them to visible.
-           function layerOn() {
-               editOn();

 
 

-               drawLayer
-                   .style('opacity', 0)
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 1)
-                   .on('end interrupt', function () {
-                       dispatch$1.call('change');
-                   });
+         function editOn() {
+           if (!layerVisible) {
+             layerVisible = true;
+             drawLayer.style('display', 'block');

            }
            }

+         } // Immediately remove the markers and their touch targets

 
 
 
 

-           // Disable the layer.  This transitions the layer invisible and then hides the notes.
-           function layerOff() {
-               throttledRedraw.cancel();
-               drawLayer.interrupt();
-               touchLayer.selectAll('.note')
-                   .remove();
-
-               drawLayer
-                   .transition()
-                   .duration(250)
-                   .style('opacity', 0)
-                   .on('end interrupt', function () {
-                       editOff();
-                       dispatch$1.call('change');
-                   });
+         function editOff() {
+           if (layerVisible) {
+             layerVisible = false;
+             drawLayer.style('display', 'none');
+             drawLayer.selectAll('.qaItem.osmose').remove();
+             touchLayer.selectAll('.qaItem.osmose').remove();

            }
            }

+         } // Enable the layer.  This shows the markers and transitions them to visible.

 
 
 
 

-           // Update the note markers
-           function updateMarkers() {
-               if (!_notesVisible || !_notesEnabled) { return; }
-
-               var service = getService();
-               var selectedID = context.selectedNoteID();
-               var data = (service ? service.notes(projection) : []);
-               var getTransform = svgPointTransform(projection);
-
-               // Draw markers..
-               var notes = drawLayer.selectAll('.note')
-                   .data(data, function(d) { return d.status + d.id; });
-
-               // exit
-               notes.exit()
-                   .remove();
-
-               // enter
-               var notesEnter = notes.enter()
-                   .append('g')
-                   .attr('class', function(d) { return 'note note-' + d.id + ' ' + d.status; })
-                   .classed('new', function(d) { return d.id < 0; });
-
-               notesEnter
-                   .append('ellipse')
-                   .attr('cx', 0.5)
-                   .attr('cy', 1)
-                   .attr('rx', 6.5)
-                   .attr('ry', 3)
-                   .attr('class', 'stroke');
-
-               notesEnter
-                   .append('path')
-                   .call(markerPath, 'shadow');
-
-               notesEnter
-                   .append('use')
-                   .attr('class', 'note-fill')
-                   .attr('width', '20px')
-                   .attr('height', '20px')
-                   .attr('x', '-8px')
-                   .attr('y', '-22px')
-                   .attr('xlink:href', '#iD-icon-note');
-
-               notesEnter.selectAll('.icon-annotation')
-                   .data(function(d) { return [d]; })
-                   .enter()
-                   .append('use')
-                   .attr('class', 'icon-annotation')
-                   .attr('width', '10px')
-                   .attr('height', '10px')
-                   .attr('x', '-3px')
-                   .attr('y', '-19px')
-                   .attr('xlink:href', function(d) {
-                       return '#iD-icon-' + (d.id < 0 ? 'plus' : (d.status === 'open' ? 'close' : 'apply'));
-                   });
+         function layerOn() {
+           editOn();
+           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+             return dispatch.call('change');
+           });
+         } // Disable the layer.  This transitions the layer invisible and then hides the markers.

 
 

-               // update
-               notes
-                   .merge(notesEnter)
-                   .sort(sortY)
-                   .classed('selected', function(d) {
-                       var mode = context.mode();
-                       var isMoving = mode && mode.id === 'drag-note';  // no shadows when dragging
-                       return !isMoving && d.id === selectedID;
-                   })
-                   .attr('transform', getTransform);

 
 

+         function layerOff() {
+           throttledRedraw.cancel();
+           drawLayer.interrupt();
+           touchLayer.selectAll('.qaItem.osmose').remove();
+           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+             editOff();
+             dispatch.call('change');
+           });
+         } // Update the issue markers

 
 

-               // Draw targets..
-               if (touchLayer.empty()) { return; }
-               var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';

 
 

-               var targets = touchLayer.selectAll('.note')
-                   .data(data, function(d) { return d.id; });
+         function updateMarkers() {
+           if (!layerVisible || !_layerEnabled) return;
+           var service = getService();
+           var selectedID = context.selectedErrorID();
+           var data = service ? service.getItems(projection) : [];
+           var getTransform = svgPointTransform(projection); // Draw markers..

 
 

-               // exit
-               targets.exit()
-                   .remove();
+           var markers = drawLayer.selectAll('.qaItem.osmose').data(data, function (d) {
+             return d.id;
+           }); // exit

 
 

-               // enter/update
-               targets.enter()
-                   .append('rect')
-                   .attr('width', '20px')
-                   .attr('height', '20px')
-                   .attr('x', '-8px')
-                   .attr('y', '-22px')
-                   .merge(targets)
-                   .sort(sortY)
-                   .attr('class', function(d) {
-                       var newClass = (d.id < 0 ? 'new' : '');
-                       return 'note target note-' + d.id + ' ' + fillClass + newClass;
-                   })
-                   .attr('transform', getTransform);
+           markers.exit().remove(); // enter

 
 

+           var markersEnter = markers.enter().append('g').attr('class', function (d) {
+             return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+           });
+           markersEnter.append('polygon').call(markerPath, 'shadow');
+           markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
+           markersEnter.append('polygon').attr('fill', function (d) {
+             return service.getColor(d.item);
+           }).call(markerPath, 'qaItem-fill');
+           markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
+             var picon = d.icon;
+
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return "#".concat(picon).concat(isMaki ? '-11' : '');
+             }
+           }); // update

 
 

-               function sortY(a, b) {
-                   return (a.id === selectedID) ? 1 : (b.id === selectedID) ? -1 : b.loc[1] - a.loc[1];
-               }
-           }
+           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+             return d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..

 
 

+           if (touchLayer.empty()) return;
+           var fillClass = context.getDebug('target') ? 'pink' : 'nocolor';
+           var targets = touchLayer.selectAll('.qaItem.osmose').data(data, function (d) {
+             return d.id;
+           }); // exit

 
 

-           // Draw the notes layer and schedule loading notes and updating markers.
-           function drawNotes(selection) {
-               var service = getService();
+           targets.exit().remove(); // enter/update

 
 

-               var surface = context.surface();
-               if (surface && !surface.empty()) {
-                   touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-               }
+           targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
+             return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+           }).attr('transform', getTransform);

 
 

-               drawLayer = selection.selectAll('.layer-notes')
-                   .data(service ? [0] : []);
+           function sortY(a, b) {
+             return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
+           }
+         } // Draw the Osmose layer and schedule loading issues and updating markers.

 
 

-               drawLayer.exit()
-                   .remove();

 
 

-               drawLayer = drawLayer.enter()
-                   .append('g')
-                   .attr('class', 'layer-notes')
-                   .style('display', _notesEnabled ? 'block' : 'none')
-                   .merge(drawLayer);
+         function drawOsmose(selection) {
+           var service = getService();
+           var surface = context.surface();

 
 

-               if (_notesEnabled) {
-                   if (service && ~~context.map().zoom() >= minZoom) {
-                       editOn();
-                       service.loadNotes(projection);
-                       updateMarkers();
-                   } else {
-                       editOff();
-                   }
-               }
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');

            }
 
            }
 

+           drawLayer = selection.selectAll('.layer-osmose').data(service ? [0] : []);
+           drawLayer.exit().remove();
+           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-osmose').style('display', _layerEnabled ? 'block' : 'none').merge(drawLayer);

 
 

-           // Toggles the layer on and off
-           drawNotes.enabled = function(val) {
-               if (!arguments.length) { return _notesEnabled; }
-
-               _notesEnabled = val;
-               if (_notesEnabled) {
-                   layerOn();
-               } else {
-                   layerOff();
-                   if (context.selectedNoteID()) {
-                       context.enter(modeBrowse(context));
-                   }
-               }
-
-               dispatch$1.call('change');
-               return this;
-           };
+           if (_layerEnabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadIssues(projection);
+               updateMarkers();
+             } else {
+               editOff();
+             }
+           }
+         } // Toggles the layer on and off

 
 
 
 

-           return drawNotes;
-       }
+         drawOsmose.enabled = function (val) {
+           if (!arguments.length) return _layerEnabled;
+           _layerEnabled = val;

 
 

-       function svgTouch() {
+           if (_layerEnabled) {
+             // Strings supplied by Osmose fetched before showing layer for first time
+             // NOTE: Currently no way to change locale in iD at runtime, would need to re-call this method if that's ever implemented
+             // Also, If layer is toggled quickly multiple requests are sent
+             getService().loadStrings().then(layerOn)["catch"](function (err) {
+               console.log(err); // eslint-disable-line no-console
+             });
+           } else {
+             layerOff();

 
 

-           function drawTouch(selection) {
-               selection.selectAll('.layer-touch')
-                   .data(['areas', 'lines', 'points', 'turns', 'markers'])
-                   .enter()
-                   .append('g')
-                   .attr('class', function(d) { return 'layer-touch ' + d; });
+             if (context.selectedErrorID()) {
+               context.enter(modeBrowse(context));
+             }

            }
 
            }
 

-           return drawTouch;
-       }
-
-       function refresh(selection, node) {
-           var cr = node.getBoundingClientRect();
-           var prop = [cr.width, cr.height];
-           selection.property('__dimensions__', prop);
-           return prop;
-       }
-
-       function utilGetDimensions(selection, force) {
-           if (!selection || selection.empty()) {
-               return [0, 0];
-           }
-           var node = selection.node(),
-               cached = selection.property('__dimensions__');
-           return (!cached || force) ? refresh(selection, node) : cached;
-       }
+           dispatch.call('change');
+           return this;
+         };

 
 

+         drawOsmose.supported = function () {
+           return !!getService();
+         };

 
 

-       function utilSetDimensions(selection, dimensions) {
-           if (!selection || selection.empty()) {
-               return selection;
-           }
-           var node = selection.node();
-           if (dimensions === null) {
-               refresh(selection, node);
-               return selection;
-           }
-           return selection
-               .property('__dimensions__', [dimensions[0], dimensions[1]])
-               .attr('width', dimensions[0])
-               .attr('height', dimensions[1]);
+         return drawOsmose;

        }
 
        }
 

-       function svgLayers(projection, context) {
-           var dispatch$1 = dispatch('change');
-           var svg = select(null);
-           var _layers = [
-               { id: 'osm', layer: svgOsm(projection, context, dispatch$1) },
-               { id: 'notes', layer: svgNotes(projection, context, dispatch$1) },
-               { id: 'data', layer: svgData(projection, context, dispatch$1) },
-               { id: 'keepRight', layer: svgKeepRight(projection, context, dispatch$1) },
-               { id: 'improveOSM', layer: svgImproveOSM(projection, context, dispatch$1) },
-               { id: 'osmose', layer: svgOsmose(projection, context, dispatch$1) },
-               { id: 'streetside', layer: svgStreetside(projection, context, dispatch$1)},
-               { id: 'mapillary', layer: svgMapillaryImages(projection, context, dispatch$1) },
-               { id: 'mapillary-map-features',  layer: svgMapillaryMapFeatures(projection, context, dispatch$1) },
-               { id: 'mapillary-signs',  layer: svgMapillarySigns(projection, context, dispatch$1) },
-               { id: 'openstreetcam', layer: svgOpenstreetcamImages(projection, context, dispatch$1) },
-               { id: 'debug', layer: svgDebug(projection, context) },
-               { id: 'geolocate', layer: svgGeolocate(projection) },
-               { id: 'touch', layer: svgTouch() }
-           ];
+       function svgStreetside(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);

 
 

+         var minZoom = 14;
+         var minMarkerZoom = 16;
+         var minViewfieldZoom = 18;
+         var layer = select(null);
+         var _viewerYaw = 0;
+         var _selectedSequence = null;

 
 

-           function drawLayers(selection) {
-               svg = selection.selectAll('.surface')
-                   .data([0]);
+         var _streetside;
+         /**
+          * init().
+          */

 
 

-               svg = svg.enter()
-                   .append('svg')
-                   .attr('class', 'surface')
-                   .merge(svg);

 
 

-               var defs = svg.selectAll('.surface-defs')
-                   .data([0]);
+         function init() {
+           if (svgStreetside.initialized) return; // run once

 
 

-               defs.enter()
-                   .append('defs')
-                   .attr('class', 'surface-defs');
+           svgStreetside.enabled = false;
+           svgStreetside.initialized = true;
+         }
+         /**
+          * getService().
+          */

 
 

-               var groups = svg.selectAll('.data-layer')
-                   .data(_layers);

 
 

-               groups.exit()
-                   .remove();
+         function getService() {
+           if (services.streetside && !_streetside) {
+             _streetside = services.streetside;

 
 

-               groups.enter()
-                   .append('g')
-                   .attr('class', function(d) { return 'data-layer ' + d.id; })
-                   .merge(groups)
-                   .each(function(d) { select(this).call(d.layer); });
+             _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
+           } else if (!services.streetside && _streetside) {
+             _streetside = null;

            }
 
            }
 

-
-           drawLayers.all = function() {
-               return _layers;
-           };
-
-
-           drawLayers.layer = function(id) {
-               var obj = _layers.find(function(o) { return o.id === id; });
-               return obj && obj.layer;
-           };
+           return _streetside;
+         }
+         /**
+          * showLayer().
+          */

 
 
 
 

-           drawLayers.only = function(what) {
-               var arr = [].concat(what);
-               var all = _layers.map(function(layer) { return layer.id; });
-               return drawLayers.remove(utilArrayDifference(all, arr));
-           };
+         function showLayer() {
+           var service = getService();
+           if (!service) return;
+           editOn();
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+             dispatch.call('change');
+           });
+         }
+         /**
+          * hideLayer().
+          */

 
 
 
 

-           drawLayers.remove = function(what) {
-               var arr = [].concat(what);
-               arr.forEach(function(id) {
-                   _layers = _layers.filter(function(o) { return o.id !== id; });
-               });
-               dispatch$1.call('change');
-               return this;
-           };
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+         }
+         /**
+          * editOn().
+          */

 
 
 
 

-           drawLayers.add = function(what) {
-               var arr = [].concat(what);
-               arr.forEach(function(obj) {
-                   if ('id' in obj && 'layer' in obj) {
-                       _layers.push(obj);
-                   }
-               });
-               dispatch$1.call('change');
-               return this;
-           };
+         function editOn() {
+           layer.style('display', 'block');
+         }
+         /**
+          * editOff().
+          */

 
 
 
 

-           drawLayers.dimensions = function(val) {
-               if (!arguments.length) { return utilGetDimensions(svg); }
-               utilSetDimensions(svg, val);
-               return this;
-           };
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }
+         /**
+          * click() Handles 'bubble' point click event.
+          */

 
 
 
 

-           return utilRebind(drawLayers, dispatch$1, 'on');
-       }
+         function click(d3_event, d) {
+           var service = getService();
+           if (!service) return; // try to preserve the viewer rotation when staying on the same sequence

 
 

-       function svgLines(projection, context) {
-           var detected = utilDetect();
+           if (d.sequenceKey !== _selectedSequence) {
+             _viewerYaw = 0; // reset
+           }

 
 

-           var highway_stack = {
-               motorway: 0,
-               motorway_link: 1,
-               trunk: 2,
-               trunk_link: 3,
-               primary: 4,
-               primary_link: 5,
-               secondary: 6,
-               tertiary: 7,
-               unclassified: 8,
-               residential: 9,
-               service: 10,
-               footway: 11
-           };
+           _selectedSequence = d.sequenceKey;
+           service.ensureViewerLoaded(context).then(function () {
+             service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
+           });
+           context.map().centerEase(d.loc);
+         }
+         /**
+          * mouseover().
+          */

 
 
 
 

-           function drawTargets(selection, graph, entities, filter) {
-               var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-               var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-               var getPath = svgPath(projection).geojson;
-               var activeID = context.activeID();
-               var base = context.history().base();
+         function mouseover(d3_event, d) {
+           var service = getService();
+           if (service) service.setStyles(context, d);
+         }
+         /**
+          * mouseout().
+          */

 
 

-               // The targets and nopes will be MultiLineString sub-segments of the ways
-               var data = { targets: [], nopes: [] };

 
 

-               entities.forEach(function(way) {
-                   var features = svgSegmentWay(way, graph, activeID);
-                   data.targets.push.apply(data.targets, features.passive);
-                   data.nopes.push.apply(data.nopes, features.active);
-               });
+         function mouseout() {
+           var service = getService();
+           if (service) service.setStyles(context, null);
+         }
+         /**
+          * transform().
+          */

 
 
 
 

-               // Targets allow hover and vertex snapping
-               var targetData = data.targets.filter(getPath);
-               var targets = selection.selectAll('.line.target-allowed')
-                   .filter(function(d) { return filter(d.properties.entity); })
-                   .data(targetData, function key(d) { return d.id; });
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);
+           var rot = d.ca + _viewerYaw;

 
 

-               // exit
-               targets.exit()
-                   .remove();
+           if (rot) {
+             t += ' rotate(' + Math.floor(rot) + ',0,0)';
+           }

 
 

-               var segmentWasEdited = function(d) {
-                   var wayID = d.properties.entity.id;
-                   // if the whole line was edited, don't draw segment changes
-                   if (!base.entities[wayID] ||
-                       !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-                       return false;
-                   }
-                   return d.properties.nodes.some(function(n) {
-                       return !base.entities[n.id] ||
-                              !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
-                   });
-               };
+           return t;
+         }

 
 

-               // enter/update
-               targets.enter()
-                   .append('path')
-                   .merge(targets)
-                   .attr('d', getPath)
-                   .attr('class', function(d) {
-                       return 'way line target target-allowed ' + targetClass + d.id;
-                   })
-                   .classed('segment-edited', segmentWasEdited);
-
-               // NOPE
-               var nopeData = data.nopes.filter(getPath);
-               var nopes = selection.selectAll('.line.target-nope')
-                   .filter(function(d) { return filter(d.properties.entity); })
-                   .data(nopeData, function key(d) { return d.id; });
-
-               // exit
-               nopes.exit()
-                   .remove();
-
-               // enter/update
-               nopes.enter()
-                   .append('path')
-                   .merge(nopes)
-                   .attr('d', getPath)
-                   .attr('class', function(d) {
-                       return 'way line target target-nope ' + nopeClass + d.id;
-                   })
-                   .classed('segment-edited', segmentWasEdited);
-           }
-
-
-           function drawLines(selection, graph, entities, filter) {
-               var base = context.history().base();
-
-               function waystack(a, b) {
-                   var selected = context.selectedIDs();
-                   var scoreA = selected.indexOf(a.id) !== -1 ? 20 : 0;
-                   var scoreB = selected.indexOf(b.id) !== -1 ? 20 : 0;
-
-                   if (a.tags.highway) { scoreA -= highway_stack[a.tags.highway]; }
-                   if (b.tags.highway) { scoreB -= highway_stack[b.tags.highway]; }
-                   return scoreA - scoreB;
-               }
-
-
-               function drawLineGroup(selection, klass, isSelected) {
-                   // Note: Don't add `.selected` class in draw modes
-                   var mode = context.mode();
-                   var isDrawing = mode && /^draw/.test(mode.id);
-                   var selectedClass = (!isDrawing && isSelected) ? 'selected ' : '';
-
-                   var lines = selection
-                       .selectAll('path')
-                       .filter(filter)
-                       .data(getPathData(isSelected), osmEntity.key);
-
-                   lines.exit()
-                       .remove();
-
-                   // Optimization: Call expensive TagClasses only on enter selection. This
-                   // works because osmEntity.key is defined to include the entity v attribute.
-                   lines.enter()
-                       .append('path')
-                       .attr('class', function(d) {
-
-                           var prefix = 'way line';
-
-                           // if this line isn't styled by its own tags
-                           if (!d.hasInterestingTags()) {
-
-                               var parentRelations = graph.parentRelations(d);
-                               var parentMultipolygons = parentRelations.filter(function(relation) {
-                                   return relation.isMultipolygon();
-                               });
-
-                               // and if it's a member of at least one multipolygon relation
-                               if (parentMultipolygons.length > 0 &&
-                                   // and only multipolygon relations
-                                   parentRelations.length === parentMultipolygons.length) {
-                                   // then fudge the classes to style this as an area edge
-                                   prefix = 'relation area';
-                               }
-                           }
+         function viewerChanged() {
+           var service = getService();
+           if (!service) return;
+           var viewer = service.viewer();
+           if (!viewer) return; // update viewfield rotation

 
 

-                           var oldMPClass = oldMultiPolygonOuters[d.id] ? 'old-multipolygon ' : '';
-                           return prefix + ' ' + klass + ' ' + selectedClass + oldMPClass + d.id;
-                       })
-                       .classed('added', function(d) {
-                           return !base.entities[d.id];
-                       })
-                       .classed('geometry-edited', function(d) {
-                           return graph.entities[d.id] &&
-                               base.entities[d.id] &&
-                               !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
-                       })
-                       .classed('retagged', function(d) {
-                           return graph.entities[d.id] &&
-                               base.entities[d.id] &&
-                               !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-                       })
-                       .call(svgTagClasses())
-                       .merge(lines)
-                       .sort(waystack)
-                       .attr('d', getPath)
-                       .call(svgTagClasses().tags(svgRelationMemberTags(graph)));
+           _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
+           // e.g. during drags or easing.

 
 

-                   return selection;
-               }
+           if (context.map().isTransformed()) return;
+           layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
+         }

 
 

+         function filterBubbles(bubbles) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();

 
 

-               function getPathData(isSelected) {
-                   return function() {
-                       var layer = this.parentNode.__data__;
-                       var data = pathdata[layer] || [];
-                       return data.filter(function(d) {
-                           if (isSelected)
-                               { return context.selectedIDs().indexOf(d.id) !== -1; }
-                           else
-                               { return context.selectedIDs().indexOf(d.id) === -1; }
-                       });
-                   };
-               }
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             bubbles = bubbles.filter(function (bubble) {
+               return new Date(bubble.captured_at).getTime() >= fromTimestamp;
+             });
+           }

 
 

-               function addMarkers(layergroup, pathclass, groupclass, groupdata, marker) {
-                   var markergroup = layergroup
-                       .selectAll('g.' + groupclass)
-                       .data([pathclass]);
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             bubbles = bubbles.filter(function (bubble) {
+               return new Date(bubble.captured_at).getTime() <= toTimestamp;
+             });
+           }

 
 

-                   markergroup = markergroup.enter()
-                       .append('g')
-                       .attr('class', groupclass)
-                       .merge(markergroup);
+           if (usernames) {
+             bubbles = bubbles.filter(function (bubble) {
+               return usernames.indexOf(bubble.captured_by) !== -1;
+             });
+           }

 
 

-                   var markers = markergroup
-                       .selectAll('path')
-                       .filter(filter)
-                       .data(
-                           function data() { return groupdata[this.parentNode.__data__] || []; },
-                           function key(d) { return [d.id, d.index]; }
-                       );
+           return bubbles;
+         }

 
 

-                   markers.exit()
-                       .remove();
+         function filterSequences(sequences) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();

 
 

-                   markers = markers.enter()
-                       .append('path')
-                       .attr('class', pathclass)
-                       .merge(markers)
-                       .attr('marker-mid', marker)
-                       .attr('d', function(d) { return d.d; });
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             sequences = sequences.filter(function (sequences) {
+               return new Date(sequences.properties.captured_at).getTime() >= fromTimestamp;
+             });
+           }

 
 

-                   if (detected.ie) {
-                       markers.each(function() { this.parentNode.insertBefore(this, this); });
-                   }
-               }
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             sequences = sequences.filter(function (sequences) {
+               return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
+             });
+           }

 
 

+           if (usernames) {
+             sequences = sequences.filter(function (sequences) {
+               return usernames.indexOf(sequences.properties.captured_by) !== -1;
+             });
+           }

 
 

-               var getPath = svgPath(projection, graph);
-               var ways = [];
-               var onewaydata = {};
-               var sideddata = {};
-               var oldMultiPolygonOuters = {};
+           return sequences;
+         }
+         /**
+          * update().
+          */

 
 

-               for (var i = 0; i < entities.length; i++) {
-                   var entity = entities[i];
-                   var outer = osmOldMultipolygonOuterMember(entity, graph);
-                   if (outer) {
-                       ways.push(entity.mergeTags(outer.tags));
-                       oldMultiPolygonOuters[outer.id] = true;
-                   } else if (entity.geometry(graph) === 'line') {
-                       ways.push(entity);
-                   }
-               }

 
 

-               ways = ways.filter(getPath);
-               var pathdata = utilArrayGroupBy(ways, function(way) { return way.layer(); });
+         function update() {
+           var viewer = context.container().select('.photoviewer');
+           var selected = viewer.empty() ? undefined : viewer.datum();
+           var z = ~~context.map().zoom();
+           var showMarkers = z >= minMarkerZoom;
+           var showViewfields = z >= minViewfieldZoom;
+           var service = getService();
+           var sequences = [];
+           var bubbles = [];

 
 

-               Object.keys(pathdata).forEach(function(k) {
-                   var v = pathdata[k];
-                   var onewayArr = v.filter(function(d) { return d.isOneWay(); });
-                   var onewaySegments = svgMarkerSegments(
-                       projection, graph, 35,
-                       function shouldReverse(entity) { return entity.tags.oneway === '-1'; },
-                       function bothDirections(entity) {
-                           return entity.tags.oneway === 'reversible' || entity.tags.oneway === 'alternating';
-                       }
-                   );
-                   onewaydata[k] = utilArrayFlatten(onewayArr.map(onewaySegments));
-
-                   var sidedArr = v.filter(function(d) { return d.isSided(); });
-                   var sidedSegments = svgMarkerSegments(
-                       projection, graph, 30,
-                       function shouldReverse() { return false; },
-                       function bothDirections() { return false; }
-                   );
-                   sideddata[k] = utilArrayFlatten(sidedArr.map(sidedSegments));
-               });
+           if (context.photos().showsPanoramic()) {
+             sequences = service ? service.sequences(projection) : [];
+             bubbles = service && showMarkers ? service.bubbles(projection) : [];
+             sequences = filterSequences(sequences);
+             bubbles = filterBubbles(bubbles);
+           }

 
 

+           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+             return d.properties.key;
+           }); // exit

 
 

-               var covered = selection.selectAll('.layer-osm.covered');     // under areas
-               var uncovered = selection.selectAll('.layer-osm.lines');     // over areas
-               var touchLayer = selection.selectAll('.layer-touch.lines');
-
-               // Draw lines..
-               [covered, uncovered].forEach(function(selection) {
-                   var range = (selection === covered ? range$1(-10,0) : range$1(0,11));
-                   var layergroup = selection
-                       .selectAll('g.layergroup')
-                       .data(range);
-
-                   layergroup = layergroup.enter()
-                       .append('g')
-                       .attr('class', function(d) { return 'layergroup layer' + String(d); })
-                       .merge(layergroup);
-
-                   layergroup
-                       .selectAll('g.linegroup')
-                       .data(['shadow', 'casing', 'stroke', 'shadow-highlighted', 'casing-highlighted', 'stroke-highlighted'])
-                       .enter()
-                       .append('g')
-                       .attr('class', function(d) { return 'linegroup line-' + d; });
-
-                   layergroup.selectAll('g.line-shadow')
-                       .call(drawLineGroup, 'shadow', false);
-                   layergroup.selectAll('g.line-casing')
-                       .call(drawLineGroup, 'casing', false);
-                   layergroup.selectAll('g.line-stroke')
-                       .call(drawLineGroup, 'stroke', false);
-
-                   layergroup.selectAll('g.line-shadow-highlighted')
-                       .call(drawLineGroup, 'shadow', true);
-                   layergroup.selectAll('g.line-casing-highlighted')
-                       .call(drawLineGroup, 'casing', true);
-                   layergroup.selectAll('g.line-stroke-highlighted')
-                       .call(drawLineGroup, 'stroke', true);
-
-                   addMarkers(layergroup, 'oneway', 'onewaygroup', onewaydata, 'url(#ideditor-oneway-marker)');
-                   addMarkers(layergroup, 'sided', 'sidedgroup', sideddata,
-                       function marker(d) {
-                           var category = graph.entity(d.id).sidednessIdentifier();
-                           return 'url(#ideditor-sided-marker-' + category + ')';
-                       }
-                   );
-               });
+           traces.exit().remove(); // enter/update

 
 

-               // Draw touch targets..
-               touchLayer
-                   .call(drawTargets, graph, ways, filter);
-           }
+           traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+           var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(bubbles, function (d) {
+             // force reenter once bubbles are attached to a sequence
+             return d.key + (d.sequenceKey ? 'v1' : 'v0');
+           }); // exit

 
 

+           groups.exit().remove(); // enter

 
 

-           return drawLines;
-       }
+           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update

 
 

-       function svgMidpoints(projection, context) {
-           var targetRadius = 8;
+           var markers = groups.merge(groupsEnter).sort(function (a, b) {
+             return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1];
+           }).attr('transform', transform).select('.viewfield-scale');
+           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+           viewfields.exit().remove(); // viewfields may or may not be drawn...
+           // but if they are, draw below the circles

 
 

-           function drawTargets(selection, graph, entities, filter) {
-               var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-               var getTransform = svgPointTransform(projection).geojson;
+           viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);

 
 

-               var data = entities.map(function(midpoint) {
-                   return {
-                       type: 'Feature',
-                       id: midpoint.id,
-                       properties: {
-                           target: true,
-                           entity: midpoint
-                       },
-                       geometry: {
-                           type: 'Point',
-                           coordinates: midpoint.loc
-                       }
-                   };
-               });
+           function viewfieldPath() {
+             var d = this.parentNode.__data__;

 
 

-               var targets = selection.selectAll('.midpoint.target')
-                   .filter(function(d) { return filter(d.properties.entity); })
-                   .data(data, function key(d) { return d.id; });
+             if (d.pano) {
+               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+             } else {
+               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+             }
+           }
+         }
+         /**
+          * drawImages()
+          * drawImages is the method that is returned (and that runs) every time 'svgStreetside()' is called.
+          * 'svgStreetside()' is called from index.js
+          */

 
 

-               // exit
-               targets.exit()
-                   .remove();

 
 

-               // enter/update
-               targets.enter()
-                   .append('circle')
-                   .attr('r', targetRadius)
-                   .merge(targets)
-                   .attr('class', function(d) { return 'node midpoint target ' + fillClass + d.id; })
-                   .attr('transform', getTransform);
+         function drawImages(selection) {
+           var enabled = svgStreetside.enabled;
+           var service = getService();
+           layer = selection.selectAll('.layer-streetside-images').data(service ? [0] : []);
+           layer.exit().remove();
+           var layerEnter = layer.enter().append('g').attr('class', 'layer-streetside-images').style('display', enabled ? 'block' : 'none');
+           layerEnter.append('g').attr('class', 'sequences');
+           layerEnter.append('g').attr('class', 'markers');
+           layer = layerEnter.merge(layer);
+
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadBubbles(projection);
+             } else {
+               editOff();
+             }

            }
            }

+         }
+         /**
+          * drawImages.enabled().
+          */

 
 
 
 

-           function drawMidpoints(selection, graph, entities, filter, extent) {
-               var drawLayer = selection.selectAll('.layer-osm.points .points-group.midpoints');
-               var touchLayer = selection.selectAll('.layer-touch.points');
+         drawImages.enabled = function (_) {
+           if (!arguments.length) return svgStreetside.enabled;
+           svgStreetside.enabled = _;

 
 

-               var mode = context.mode();
-               if ((mode && mode.id !== 'select') || !context.map().withinEditableZoom()) {
-                   drawLayer.selectAll('.midpoint').remove();
-                   touchLayer.selectAll('.midpoint.target').remove();
-                   return;
-               }
+           if (svgStreetside.enabled) {
+             showLayer();
+             context.photos().on('change.streetside', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.streetside', null);
+           }

 
 

-               var poly = extent.polygon();
-               var midpoints = {};
+           dispatch.call('change');
+           return this;
+         };
+         /**
+          * drawImages.supported().
+          */

 
 

-               for (var i = 0; i < entities.length; i++) {
-                   var entity = entities[i];

 
 

-                   if (entity.type !== 'way') { continue; }
-                   if (!filter(entity)) { continue; }
-                   if (context.selectedIDs().indexOf(entity.id) < 0) { continue; }
+         drawImages.supported = function () {
+           return !!getService();
+         };

 
 

-                   var nodes = graph.childNodes(entity);
-                   for (var j = 0; j < nodes.length - 1; j++) {
-                       var a = nodes[j];
-                       var b = nodes[j + 1];
-                       var id = [a.id, b.id].sort().join('-');
+         init();
+         return drawImages;
+       }

 
 

-                       if (midpoints[id]) {
-                           midpoints[id].parents.push(entity);
-                       } else if (geoVecLength(projection(a.loc), projection(b.loc)) > 40) {
-                           var point = geoVecInterp(a.loc, b.loc, 0.5);
-                           var loc = null;
+       function svgMapillaryImages(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);

 
 

-                           if (extent.intersects(point)) {
-                               loc = point;
-                           } else {
-                               for (var k = 0; k < 4; k++) {
-                                   point = geoLineIntersection([a.loc, b.loc], [poly[k], poly[k + 1]]);
-                                   if (point &&
-                                       geoVecLength(projection(a.loc), projection(point)) > 20 &&
-                                       geoVecLength(projection(b.loc), projection(point)) > 20)
-                                   {
-                                       loc = point;
-                                       break;
-                                   }
-                               }
-                           }
+         var minZoom = 12;
+         var minMarkerZoom = 16;
+         var minViewfieldZoom = 18;
+         var layer = select(null);

 
 

-                           if (loc) {
-                               midpoints[id] = {
-                                   type: 'midpoint',
-                                   id: id,
-                                   loc: loc,
-                                   edge: [a.id, b.id],
-                                   parents: [entity]
-                               };
-                           }
-                       }
-                   }
-               }
+         var _mapillary;

 
 

+         function init() {
+           if (svgMapillaryImages.initialized) return; // run once

 
 

-               function midpointFilter(d) {
-                   if (midpoints[d.id])
-                       { return true; }
+           svgMapillaryImages.enabled = false;
+           svgMapillaryImages.initialized = true;
+         }

 
 

-                   for (var i = 0; i < d.parents.length; i++) {
-                       if (filter(d.parents[i])) {
-                           return true;
-                       }
-                   }
+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;

 
 

-                   return false;
-               }
+             _mapillary.event.on('loadedImages', throttledRedraw);
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
+           }

 
 

+           return _mapillary;
+         }

 
 

-               var groups = drawLayer.selectAll('.midpoint')
-                   .filter(midpointFilter)
-                   .data(Object.values(midpoints), function(d) { return d.id; });
+         function showLayer() {
+           var service = getService();
+           if (!service) return;
+           editOn();
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+             dispatch.call('change');
+           });
+         }

 
 

-               groups.exit()
-                   .remove();
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+         }

 
 

-               var enter = groups.enter()
-                   .insert('g', ':first-child')
-                   .attr('class', 'midpoint');
+         function editOn() {
+           layer.style('display', 'block');
+         }

 
 

-               enter
-                   .append('polygon')
-                   .attr('points', '-6,8 10,0 -6,-8')
-                   .attr('class', 'shadow');
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }

 
 

-               enter
-                   .append('polygon')
-                   .attr('points', '-3,4 5,0 -3,-4')
-                   .attr('class', 'fill');
+         function click(d3_event, image) {
+           var service = getService();
+           if (!service) return;
+           service.ensureViewerLoaded(context).then(function () {
+             service.selectImage(context, image.id).showViewer(context);
+           });
+           context.map().centerEase(image.loc);
+         }

 
 

-               groups = groups
-                   .merge(enter)
-                   .attr('transform', function(d) {
-                       var translate = svgPointTransform(projection);
-                       var a = graph.entity(d.edge[0]);
-                       var b = graph.entity(d.edge[1]);
-                       var angle = geoAngle(a, b, projection) * (180 / Math.PI);
-                       return translate(d) + ' rotate(' + angle + ')';
-                   })
-                   .call(svgTagClasses().tags(
-                       function(d) { return d.parents[0].tags; }
-                   ));
+         function mouseover(d3_event, image) {
+           var service = getService();
+           if (service) service.setStyles(context, image);
+         }

 
 

-               // Propagate data bindings.
-               groups.select('polygon.shadow');
-               groups.select('polygon.fill');
+         function mouseout() {
+           var service = getService();
+           if (service) service.setStyles(context, null);
+         }

 
 

+         function transform(d) {
+           var t = svgPointTransform(projection)(d);

 
 

-               // Draw touch targets..
-               touchLayer
-                   .call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+           if (d.ca) {
+             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';

            }
 
            }
 

-           return drawMidpoints;
-       }
+           return t;
+         }

 
 

-       function svgPoints(projection, context) {
+         function filterImages(images) {
+           var showsPano = context.photos().showsPanoramic();
+           var showsFlat = context.photos().showsFlat();
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();

 
 

-           function markerPath(selection, klass) {
-               selection
-                   .attr('class', klass)
-                   .attr('transform', 'translate(-8, -23)')
-                   .attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+           if (!showsPano || !showsFlat) {
+             images = images.filter(function (image) {
+               if (image.is_pano) return showsPano;
+               return showsFlat;
+             });

            }
 
            }
 

-           function sortY(a, b) {
-               return b.loc[1] - a.loc[1];
+           if (fromDate) {
+             images = images.filter(function (image) {
+               return new Date(image.captured_at).getTime() >= new Date(fromDate).getTime();
+             });

            }
 
            }
 

-
-           // Avoid exit/enter if we're just moving stuff around.
-           // The node will get a new version but we only need to run the update selection.
-           function fastEntityKey(d) {
-               var mode = context.mode();
-               var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-               return isMoving ? d.id : osmEntity.key(d);
+           if (toDate) {
+             images = images.filter(function (image) {
+               return new Date(image.captured_at).getTime() <= new Date(toDate).getTime();
+             });

            }
 
            }
 

+           return images;
+         }

 
 

-           function drawTargets(selection, graph, entities, filter) {
-               var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-               var getTransform = svgPointTransform(projection).geojson;
-               var activeID = context.activeID();
-               var data = [];
-
-               entities.forEach(function(node) {
-                   if (activeID === node.id) { return; }   // draw no target on the activeID
-
-                   data.push({
-                       type: 'Feature',
-                       id: node.id,
-                       properties: {
-                           target: true,
-                           entity: node
-                       },
-                       geometry: node.asGeoJSON()
-                   });
-               });
-
-               var targets = selection.selectAll('.point.target')
-                   .filter(function(d) { return filter(d.properties.entity); })
-                   .data(data, function key(d) { return d.id; });
-
-               // exit
-               targets.exit()
-                   .remove();
-
-               // enter/update
-               targets.enter()
-                   .append('rect')
-                   .attr('x', -10)
-                   .attr('y', -26)
-                   .attr('width', 20)
-                   .attr('height', 30)
-                   .merge(targets)
-                   .attr('class', function(d) { return 'node point target ' + fillClass + d.id; })
-                   .attr('transform', getTransform);
-           }
-
-
-           function drawPoints(selection, graph, entities, filter) {
-               var wireframe = context.surface().classed('fill-wireframe');
-               var zoom = geoScaleToZoom(projection.scale());
-               var base = context.history().base();
-
-               // Points with a direction will render as vertices at higher zooms..
-               function renderAsPoint(entity) {
-                   return entity.geometry(graph) === 'point' &&
-                       !(zoom >= 18 && entity.directions(graph, projection).length);
-               }
-
-               // All points will render as vertices in wireframe mode too..
-               var points = wireframe ? [] : entities.filter(renderAsPoint);
-               points.sort(sortY);
-
-
-               var drawLayer = selection.selectAll('.layer-osm.points .points-group.points');
-               var touchLayer = selection.selectAll('.layer-touch.points');
-
-               // Draw points..
-               var groups = drawLayer.selectAll('g.point')
-                   .filter(filter)
-                   .data(points, fastEntityKey);
-
-               groups.exit()
-                   .remove();
-
-               var enter = groups.enter()
-                   .append('g')
-                   .attr('class', function(d) { return 'node point ' + d.id; })
-                   .order();
-
-               enter
-                   .append('path')
-                   .call(markerPath, 'shadow');
-
-               enter
-                   .append('ellipse')
-                   .attr('cx', 0.5)
-                   .attr('cy', 1)
-                   .attr('rx', 6.5)
-                   .attr('ry', 3)
-                   .attr('class', 'stroke');
-
-               enter
-                   .append('path')
-                   .call(markerPath, 'stroke');
-
-               enter
-                   .append('use')
-                   .attr('transform', 'translate(-5, -19)')
-                   .attr('class', 'icon')
-                   .attr('width', '11px')
-                   .attr('height', '11px');
-
-               groups = groups
-                   .merge(enter)
-                   .attr('transform', svgPointTransform(projection))
-                   .classed('added', function(d) {
-                       return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
-                   })
-                   .classed('moved', function(d) {
-                       return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
-                   })
-                   .classed('retagged', function(d) {
-                       return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-                   })
-                   .call(svgTagClasses());
-
-               groups.select('.shadow');   // propagate bound data
-               groups.select('.stroke');   // propagate bound data
-               groups.select('.icon')      // propagate bound data
-                   .attr('xlink:href', function(entity) {
-                       var preset = _mainPresetIndex.match(entity, graph);
-                       var picon = preset && preset.icon;
-
-                       if (!picon) {
-                           return '';
-                       } else {
-                           var isMaki = /^maki-/.test(picon);
-                           return '#' + picon + (isMaki ? '-11' : '');
-                       }
-                   });
+         function filterSequences(sequences) {
+           var showsPano = context.photos().showsPanoramic();
+           var showsFlat = context.photos().showsFlat();
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();

 
 

+           if (!showsPano || !showsFlat) {
+             sequences = sequences.filter(function (sequence) {
+               if (sequence.properties.hasOwnProperty('is_pano')) {
+                 if (sequence.properties.is_pano) return showsPano;
+                 return showsFlat;
+               }

 
 

-               // Draw touch targets..
-               touchLayer
-                   .call(drawTargets, graph, points, filter);
+               return false;
+             });

            }
 
            }
 

-
-           return drawPoints;
-       }
-
-       function svgTurns(projection, context) {
-
-           function icon(turn) {
-               var u = turn.u ? '-u' : '';
-               if (turn.no) { return '#iD-turn-no' + u; }
-               if (turn.only) { return '#iD-turn-only' + u; }
-               return '#iD-turn-yes' + u;
+           if (fromDate) {
+             sequences = sequences.filter(function (sequence) {
+               return new Date(sequence.properties.captured_at).getTime() >= new Date(fromDate).getTime().toString();
+             });

            }
 
            }
 

-           function drawTurns(selection, graph, turns) {
+           if (toDate) {
+             sequences = sequences.filter(function (sequence) {
+               return new Date(sequence.properties.captured_at).getTime() <= new Date(toDate).getTime().toString();
+             });
+           }

 
 

-               function turnTransform(d) {
-                   var pxRadius = 50;
-                   var toWay = graph.entity(d.to.way);
-                   var toPoints = graph.childNodes(toWay)
-                       .map(function (n) { return n.loc; })
-                       .map(projection);
-                   var toLength = geoPathLength(toPoints);
-                   var mid = toLength / 2;    // midpoint of destination way
+           return sequences;
+         }

 
 

-                   var toNode = graph.entity(d.to.node);
-                   var toVertex = graph.entity(d.to.vertex);
-                   var a = geoAngle(toVertex, toNode, projection);
-                   var o = projection(toVertex.loc);
-                   var r = d.u ? 0                  // u-turn: no radius
-                       : !toWay.__via ? pxRadius    // leaf way: put marker at pxRadius
-                       : Math.min(mid, pxRadius);   // via way: prefer pxRadius, fallback to mid for very short ways
+         function update() {
+           var z = ~~context.map().zoom();
+           var showMarkers = z >= minMarkerZoom;
+           var showViewfields = z >= minViewfieldZoom;
+           var service = getService();
+           var sequences = service ? service.sequences(projection) : [];
+           var images = service && showMarkers ? service.images(projection) : [];
+           images = filterImages(images);
+           sequences = filterSequences(sequences);
+           service.filterViewer(context);
+           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+             return d.properties.id;
+           }); // exit
+
+           traces.exit().remove(); // enter/update
+
+           traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+           var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
+             return d.id;
+           }); // exit
+
+           groups.exit().remove(); // enter
+
+           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
+
+           var markers = groups.merge(groupsEnter).sort(function (a, b) {
+             return b.loc[1] - a.loc[1]; // sort Y
+           }).attr('transform', transform).select('.viewfield-scale');
+           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+           viewfields.exit().remove();
+           viewfields.enter() // viewfields may or may not be drawn...
+           .insert('path', 'circle') // but if they are, draw below the circles
+           .attr('class', 'viewfield').classed('pano', function () {
+             return this.parentNode.__data__.is_pano;
+           }).attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);

 
 

-                   return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' +
-                       'rotate(' + a * 180 / Math.PI + ')';
-               }
+           function viewfieldPath() {
+             if (this.parentNode.__data__.is_pano) {
+               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+             } else {
+               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+             }
+           }
+         }

 
 

+         function drawImages(selection) {
+           var enabled = svgMapillaryImages.enabled;
+           var service = getService();
+           layer = selection.selectAll('.layer-mapillary').data(service ? [0] : []);
+           layer.exit().remove();
+           var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary').style('display', enabled ? 'block' : 'none');
+           layerEnter.append('g').attr('class', 'sequences');
+           layerEnter.append('g').attr('class', 'markers');
+           layer = layerEnter.merge(layer);
+
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadImages(projection);
+             } else {
+               editOff();
+             }
+           }
+         }

 
 

-               var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
-               var touchLayer = selection.selectAll('.layer-touch.turns');
+         drawImages.enabled = function (_) {
+           if (!arguments.length) return svgMapillaryImages.enabled;
+           svgMapillaryImages.enabled = _;

 
 

-               // Draw turns..
-               var groups = drawLayer.selectAll('g.turn')
-                   .data(turns, function(d) { return d.key; });
+           if (svgMapillaryImages.enabled) {
+             showLayer();
+             context.photos().on('change.mapillary_images', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.mapillary_images', null);
+           }

 
 

-               // exit
-               groups.exit()
-                   .remove();
+           dispatch.call('change');
+           return this;
+         };

 
 

-               // enter
-               var groupsEnter = groups.enter()
-                   .append('g')
-                   .attr('class', function(d) { return 'turn ' + d.key; });
+         drawImages.supported = function () {
+           return !!getService();
+         };

 
 

-               var turnsEnter = groupsEnter
-                   .filter(function(d) { return !d.u; });
+         init();
+         return drawImages;
+       }

 
 

-               turnsEnter.append('rect')
-                   .attr('transform', 'translate(-22, -12)')
-                   .attr('width', '44')
-                   .attr('height', '24');
+       function svgMapillaryPosition(projection, context) {
+         var throttledRedraw = throttle(function () {
+           update();
+         }, 1000);

 
 

-               turnsEnter.append('use')
-                   .attr('transform', 'translate(-22, -12)')
-                   .attr('width', '44')
-                   .attr('height', '24');
+         var minZoom = 12;
+         var minViewfieldZoom = 18;
+         var layer = select(null);

 
 

-               var uEnter = groupsEnter
-                   .filter(function(d) { return d.u; });
+         var _mapillary;

 
 

-               uEnter.append('circle')
-                   .attr('r', '16');
+         var viewerCompassAngle;

 
 

-               uEnter.append('use')
-                   .attr('transform', 'translate(-16, -16)')
-                   .attr('width', '32')
-                   .attr('height', '32');
+         function init() {
+           if (svgMapillaryPosition.initialized) return; // run once

 
 

-               // update
-               groups = groups
-                   .merge(groupsEnter)
-                   .attr('opacity', function(d) { return d.direct === false ? '0.7' : null; })
-                   .attr('transform', turnTransform);
+           svgMapillaryPosition.initialized = true;
+         }

 
 

-               groups.select('use')
-                   .attr('xlink:href', icon);
+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;

 
 

-               groups.select('rect');      // propagate bound data
-               groups.select('circle');    // propagate bound data
+             _mapillary.event.on('imageChanged', throttledRedraw);

 
 

+             _mapillary.event.on('bearingChanged', function (e) {
+               viewerCompassAngle = e.bearing;
+               if (context.map().isTransformed()) return;
+               layer.selectAll('.viewfield-group.currentView').filter(function (d) {
+                 return d.is_pano;
+               }).attr('transform', transform);
+             });
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
+           }

 
 

-               // Draw touch targets..
-               var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-               groups = touchLayer.selectAll('g.turn')
-                   .data(turns, function(d) { return d.key; });
+           return _mapillary;
+         }

 
 

-               // exit
-               groups.exit()
-                   .remove();
+         function editOn() {
+           layer.style('display', 'block');
+         }

 
 

-               // enter
-               groupsEnter = groups.enter()
-                   .append('g')
-                   .attr('class', function(d) { return 'turn ' + d.key; });
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }

 
 

-               turnsEnter = groupsEnter
-                   .filter(function(d) { return !d.u; });
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);

 
 

-               turnsEnter.append('rect')
-                   .attr('class', 'target ' + fillClass)
-                   .attr('transform', 'translate(-22, -12)')
-                   .attr('width', '44')
-                   .attr('height', '24');
+           if (d.is_pano && viewerCompassAngle !== null && isFinite(viewerCompassAngle)) {
+             t += ' rotate(' + Math.floor(viewerCompassAngle) + ',0,0)';
+           } else if (d.ca) {
+             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
+           }

 
 

-               uEnter = groupsEnter
-                   .filter(function(d) { return d.u; });
+           return t;
+         }

 
 

-               uEnter.append('circle')
-                   .attr('class', 'target ' + fillClass)
-                   .attr('r', '16');
+         function update() {
+           var z = ~~context.map().zoom();
+           var showViewfields = z >= minViewfieldZoom;
+           var service = getService();
+           var image = service && service.getActiveImage();
+           var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(image ? [image] : [], function (d) {
+             return d.id;
+           }); // exit

 
 

-               // update
-               groups = groups
-                   .merge(groupsEnter)
-                   .attr('transform', turnTransform);
+           groups.exit().remove(); // enter

 
 

-               groups.select('rect');      // propagate bound data
-               groups.select('circle');    // propagate bound data
+           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group currentView highlighted');
+           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update

 
 

+           var markers = groups.merge(groupsEnter).attr('transform', transform).select('.viewfield-scale');
+           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+           viewfields.exit().remove();
+           viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
+         }

 
 

-               return this;
+         function drawImages(selection) {
+           var service = getService();
+           layer = selection.selectAll('.layer-mapillary-position').data(service ? [0] : []);
+           layer.exit().remove();
+           var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary-position');
+           layerEnter.append('g').attr('class', 'markers');
+           layer = layerEnter.merge(layer);
+
+           if (service && ~~context.map().zoom() >= minZoom) {
+             editOn();
+             update();
+           } else {
+             editOff();

            }
            }

+         }

 
 

-           return drawTurns;
-       }
+         drawImages.enabled = function () {
+           update();
+           return this;
+         };

 
 

-       function svgVertices(projection, context) {
-           var radiuses = {
-               //       z16-, z17,   z18+,  w/icon
-               shadow: [6,    7.5,   7.5,   12],
-               stroke: [2.5,  3.5,   3.5,   8],
-               fill:   [1,    1.5,   1.5,   1.5]
-           };
+         drawImages.supported = function () {
+           return !!getService();
+         };

 
 

-           var _currHoverTarget;
-           var _currPersistent = {};
-           var _currHover = {};
-           var _prevHover = {};
-           var _currSelected = {};
-           var _prevSelected = {};
-           var _radii = {};
+         init();
+         return drawImages;
+       }

 
 

+       function svgMapillarySigns(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);

 
 

-           function sortY(a, b) {
-               return b.loc[1] - a.loc[1];
-           }
+         var minZoom = 12;
+         var layer = select(null);

 
 

-           // Avoid exit/enter if we're just moving stuff around.
-           // The node will get a new version but we only need to run the update selection.
-           function fastEntityKey(d) {
-               var mode = context.mode();
-               var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-               return isMoving ? d.id : osmEntity.key(d);
-           }
+         var _mapillary;

 
 

+         function init() {
+           if (svgMapillarySigns.initialized) return; // run once

 
 

-           function draw(selection, graph, vertices, sets, filter) {
-               sets = sets || { selected: {}, important: {}, hovered: {} };
+           svgMapillarySigns.enabled = false;
+           svgMapillarySigns.initialized = true;
+         }

 
 

-               var icons = {};
-               var directions = {};
-               var wireframe = context.surface().classed('fill-wireframe');
-               var zoom = geoScaleToZoom(projection.scale());
-               var z = (zoom < 17 ? 0 : zoom < 18 ? 1 : 2);
-               var activeID = context.activeID();
-               var base = context.history().base();
+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;

 
 

+             _mapillary.event.on('loadedSigns', throttledRedraw);
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
+           }

 
 

-               function getIcon(d) {
-                   // always check latest entity, as fastEntityKey avoids enter/exit now
-                   var entity = graph.entity(d.id);
-                   if (entity.id in icons) { return icons[entity.id]; }
+           return _mapillary;
+         }

 
 

-                   icons[entity.id] =
-                       entity.hasInterestingTags() &&
-                       _mainPresetIndex.match(entity, graph).icon;
+         function showLayer() {
+           var service = getService();
+           if (!service) return;
+           service.loadSignResources(context);
+           editOn();
+         }

 
 

-                   return icons[entity.id];
-               }
+         function hideLayer() {
+           throttledRedraw.cancel();
+           editOff();
+         }

 
 

+         function editOn() {
+           layer.style('display', 'block');
+         }

 
 

-               // memoize directions results, return false for empty arrays (for use in filter)
-               function getDirections(entity) {
-                   if (entity.id in directions) { return directions[entity.id]; }
+         function editOff() {
+           layer.selectAll('.icon-sign').remove();
+           layer.style('display', 'none');
+         }

 
 

-                   var angles = entity.directions(graph, projection);
-                   directions[entity.id] = angles.length ? angles : false;
-                   return angles;
+         function click(d3_event, d) {
+           var service = getService();
+           if (!service) return;
+           context.map().centerEase(d.loc);
+           var selectedImageId = service.getActiveImage() && service.getActiveImage().id;
+           service.getDetections(d.id).then(function (detections) {
+             if (detections.length) {
+               var imageId = detections[0].image.id;
+
+               if (imageId === selectedImageId) {
+                 service.highlightDetection(detections[0]).selectImage(context, imageId);
+               } else {
+                 service.ensureViewerLoaded(context).then(function () {
+                   service.highlightDetection(detections[0]).selectImage(context, imageId).showViewer(context);
+                 });

                }
                }

+             }
+           });
+         }

 
 

+         function filterData(detectedFeatures) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();

 
 

-               function updateAttributes(selection) {
-                   ['shadow', 'stroke', 'fill'].forEach(function(klass) {
-                       var rads = radiuses[klass];
-                       selection.selectAll('.' + klass)
-                           .each(function(entity) {
-                               var i = z && getIcon(entity);
-                               var r = rads[i ? 3 : z];
-
-                               // slightly increase the size of unconnected endpoints #3775
-                               if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
-                                   r += 1.5;
-                               }
-
-                               if (klass === 'shadow') {   // remember this value, so we don't need to
-                                   _radii[entity.id] = r;  // recompute it when we draw the touch targets
-                               }
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.last_seen_at).getTime() >= fromTimestamp;
+             });
+           }

 
 

-                               select(this)
-                                   .attr('r', r)
-                                   .attr('visibility', (i && klass === 'fill') ? 'hidden' : null);
-                           });
-                   });
-               }
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.first_seen_at).getTime() <= toTimestamp;
+             });
+           }

 
 

-               vertices.sort(sortY);
-
-               var groups = selection.selectAll('g.vertex')
-                   .filter(filter)
-                   .data(vertices, fastEntityKey);
-
-               // exit
-               groups.exit()
-                   .remove();
-
-               // enter
-               var enter = groups.enter()
-                   .append('g')
-                   .attr('class', function(d) { return 'node vertex ' + d.id; })
-                   .order();
-
-               enter
-                   .append('circle')
-                   .attr('class', 'shadow');
-
-               enter
-                   .append('circle')
-                   .attr('class', 'stroke');
-
-               // Vertices with tags get a fill.
-               enter.filter(function(d) { return d.hasInterestingTags(); })
-                   .append('circle')
-                   .attr('class', 'fill');
-
-               // update
-               groups = groups
-                   .merge(enter)
-                   .attr('transform', svgPointTransform(projection))
-                   .classed('sibling', function(d) { return d.id in sets.selected; })
-                   .classed('shared', function(d) { return graph.isShared(d); })
-                   .classed('endpoint', function(d) { return d.isEndpoint(graph); })
-                   .classed('added', function(d) {
-                       return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
-                   })
-                   .classed('moved', function(d) {
-                       return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
-                   })
-                   .classed('retagged', function(d) {
-                       return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-                   })
-                   .call(updateAttributes);
-
-               // Vertices with icons get a `use`.
-               var iconUse = groups
-                   .selectAll('.icon')
-                   .data(function data(d) { return zoom >= 17 && getIcon(d) ? [d] : []; }, fastEntityKey);
-
-               // exit
-               iconUse.exit()
-                   .remove();
-
-               // enter
-               iconUse.enter()
-                   .append('use')
-                   .attr('class', 'icon')
-                   .attr('width', '11px')
-                   .attr('height', '11px')
-                   .attr('transform', 'translate(-5.5, -5.5)')
-                   .attr('xlink:href', function(d) {
-                       var picon = getIcon(d);
-                       var isMaki = /^maki-/.test(picon);
-                       return '#' + picon + (isMaki ? '-11' : '');
-                   });
+           return detectedFeatures;
+         }

 
 

+         function update() {
+           var service = getService();
+           var data = service ? service.signs(projection) : [];
+           data = filterData(data);
+           var transform = svgPointTransform(projection);
+           var signs = layer.selectAll('.icon-sign').data(data, function (d) {
+             return d.id;
+           }); // exit
+
+           signs.exit().remove(); // enter
+
+           var enter = signs.enter().append('g').attr('class', 'icon-sign icon-detected').on('click', click);
+           enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
+             return '#' + d.value;
+           });
+           enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update

 
 

-               // Vertices with directions get viewfields
-               var dgroups = groups
-                   .selectAll('.viewfieldgroup')
-                   .data(function data(d) { return zoom >= 18 && getDirections(d) ? [d] : []; }, fastEntityKey);
-
-               // exit
-               dgroups.exit()
-                   .remove();
-
-               // enter/update
-               dgroups = dgroups.enter()
-                   .insert('g', '.shadow')
-                   .attr('class', 'viewfieldgroup')
-                   .merge(dgroups);
-
-               var viewfields = dgroups.selectAll('.viewfield')
-                   .data(getDirections, function key(d) { return osmEntity.key(d); });
-
-               // exit
-               viewfields.exit()
-                   .remove();
-
-               // enter/update
-               viewfields.enter()
-                   .append('path')
-                   .attr('class', 'viewfield')
-                   .attr('d', 'M0,0H0')
-                   .merge(viewfields)
-                   .attr('marker-start', 'url(#ideditor-viewfield-marker' + (wireframe ? '-wireframe' : '') + ')')
-                   .attr('transform', function(d) { return 'rotate(' + d + ')'; });
-           }
-
-
-           function drawTargets(selection, graph, entities, filter) {
-               var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-               var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-               var getTransform = svgPointTransform(projection).geojson;
-               var activeID = context.activeID();
-               var data = { targets: [], nopes: [] };
-
-               entities.forEach(function(node) {
-                   if (activeID === node.id) { return; }   // draw no target on the activeID
-
-                   var vertexType = svgPassiveVertex(node, graph, activeID);
-                   if (vertexType !== 0) {     // passive or adjacent - allow to connect
-                       data.targets.push({
-                           type: 'Feature',
-                           id: node.id,
-                           properties: {
-                               target: true,
-                               entity: node
-                           },
-                           geometry: node.asGeoJSON()
-                       });
-                   } else {
-                       data.nopes.push({
-                           type: 'Feature',
-                           id: node.id + '-nope',
-                           properties: {
-                               nope: true,
-                               target: true,
-                               entity: node
-                           },
-                           geometry: node.asGeoJSON()
-                       });
-                   }
-               });
+           signs.merge(enter).attr('transform', transform);
+         }

 
 

-               // Targets allow hover and vertex snapping
-               var targets = selection.selectAll('.vertex.target-allowed')
-                   .filter(function(d) { return filter(d.properties.entity); })
-                   .data(data.targets, function key(d) { return d.id; });
-
-               // exit
-               targets.exit()
-                   .remove();
-
-               // enter/update
-               targets.enter()
-                   .append('circle')
-                   .attr('r', function(d) {
-                       return _radii[d.id]
-                         || radiuses.shadow[3];
-                   })
-                   .merge(targets)
-                   .attr('class', function(d) {
-                       return 'node vertex target target-allowed '
-                       + targetClass + d.id;
-                   })
-                   .attr('transform', getTransform);
-
-
-               // NOPE
-               var nopes = selection.selectAll('.vertex.target-nope')
-                   .filter(function(d) { return filter(d.properties.entity); })
-                   .data(data.nopes, function key(d) { return d.id; });
-
-               // exit
-               nopes.exit()
-                   .remove();
-
-               // enter/update
-               nopes.enter()
-                   .append('circle')
-                   .attr('r', function(d) { return (_radii[d.properties.entity.id] || radiuses.shadow[3]); })
-                   .merge(nopes)
-                   .attr('class', function(d) { return 'node vertex target target-nope ' + nopeClass + d.id; })
-                   .attr('transform', getTransform);
-           }
-
-
-           // Points can also render as vertices:
-           // 1. in wireframe mode or
-           // 2. at higher zooms if they have a direction
-           function renderAsVertex(entity, graph, wireframe, zoom) {
-               var geometry = entity.geometry(graph);
-               return geometry === 'vertex' || (geometry === 'point' && (
-                   wireframe || (zoom >= 18 && entity.directions(graph, projection).length)
-               ));
-           }
-
-
-           function isEditedNode(node, base, head) {
-               var baseNode = base.entities[node.id];
-               var headNode = head.entities[node.id];
-               return !headNode ||
-                   !baseNode ||
-                   !fastDeepEqual(headNode.tags, baseNode.tags) ||
-                   !fastDeepEqual(headNode.loc, baseNode.loc);
-           }
-
-
-           function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
-               var results = {};
-
-               var seenIds = {};
-
-               function addChildVertices(entity) {
-
-                   // avoid redunant work and infinite recursion of circular relations
-                   if (seenIds[entity.id]) { return; }
-                   seenIds[entity.id] = true;
-
-                   var geometry = entity.geometry(graph);
-                   if (!context.features().isHiddenFeature(entity, graph, geometry)) {
-                       var i;
-                       if (entity.type === 'way') {
-                           for (i = 0; i < entity.nodes.length; i++) {
-                               var child = graph.hasEntity(entity.nodes[i]);
-                               if (child) {
-                                   addChildVertices(child);
-                               }
-                           }
-                       } else if (entity.type === 'relation') {
-                           for (i = 0; i < entity.members.length; i++) {
-                               var member = graph.hasEntity(entity.members[i].id);
-                               if (member) {
-                                   addChildVertices(member);
-                               }
-                           }
-                       } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
-                           results[entity.id] = entity;
-                       }
-                   }
-               }
+         function drawSigns(selection) {
+           var enabled = svgMapillarySigns.enabled;
+           var service = getService();
+           layer = selection.selectAll('.layer-mapillary-signs').data(service ? [0] : []);
+           layer.exit().remove();
+           layer = layer.enter().append('g').attr('class', 'layer-mapillary-signs layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);

 
 

-               ids.forEach(function(id) {
-                   var entity = graph.hasEntity(id);
-                   if (!entity) { return; }
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadSigns(projection);
+               service.showSignDetections(true);
+             } else {
+               editOff();
+             }
+           } else if (service) {
+             service.showSignDetections(false);
+           }
+         }

 
 

-                   if (entity.type === 'node') {
-                       if (renderAsVertex(entity, graph, wireframe, zoom)) {
-                           results[entity.id] = entity;
-                           graph.parentWays(entity).forEach(function(entity) {
-                               addChildVertices(entity);
-                           });
-                       }
-                   } else {  // way, relation
-                       addChildVertices(entity);
-                   }
-               });
+         drawSigns.enabled = function (_) {
+           if (!arguments.length) return svgMapillarySigns.enabled;
+           svgMapillarySigns.enabled = _;

 
 

-               return results;
+           if (svgMapillarySigns.enabled) {
+             showLayer();
+             context.photos().on('change.mapillary_signs', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.mapillary_signs', null);

            }
 
            }
 

+           dispatch.call('change');
+           return this;
+         };

 
 

-           function drawVertices(selection, graph, entities, filter, extent, fullRedraw) {
-               var wireframe = context.surface().classed('fill-wireframe');
-               var visualDiff = context.surface().classed('highlight-edited');
-               var zoom = geoScaleToZoom(projection.scale());
-               var mode = context.mode();
-               var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-               var base = context.history().base();
-
-               var drawLayer = selection.selectAll('.layer-osm.points .points-group.vertices');
-               var touchLayer = selection.selectAll('.layer-touch.points');
-
-               if (fullRedraw) {
-                   _currPersistent = {};
-                   _radii = {};
-               }
-
-               // Collect important vertices from the `entities` list..
-               // (during a paritial redraw, it will not contain everything)
-               for (var i = 0; i < entities.length; i++) {
-                   var entity = entities[i];
-                   var geometry = entity.geometry(graph);
-                   var keep = false;
-
-                   // a point that looks like a vertex..
-                   if ((geometry === 'point') && renderAsVertex(entity, graph, wireframe, zoom)) {
-                       _currPersistent[entity.id] = entity;
-                       keep = true;
-
-                   // a vertex of some importance..
-                   } else if (geometry === 'vertex' &&
-                       (entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph)
-                       || (visualDiff && isEditedNode(entity, base, graph)))) {
-                       _currPersistent[entity.id] = entity;
-                       keep = true;
-                   }
+         drawSigns.supported = function () {
+           return !!getService();
+         };

 
 

-                   // whatever this is, it's not a persistent vertex..
-                   if (!keep && !fullRedraw) {
-                       delete _currPersistent[entity.id];
-                   }
-               }
+         init();
+         return drawSigns;
+       }

 
 

-               // 3 sets of vertices to consider:
-               var sets = {
-                   persistent: _currPersistent,  // persistent = important vertices (render always)
-                   selected: _currSelected,      // selected + siblings of selected (render always)
-                   hovered: _currHover           // hovered + siblings of hovered (render only in draw modes)
-               };
+       function svgMapillaryMapFeatures(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);

 
 

-               var all = Object.assign({}, (isMoving ? _currHover : {}), _currSelected, _currPersistent);
+         var minZoom = 12;
+         var layer = select(null);

 
 

-               // Draw the vertices..
-               // The filter function controls the scope of what objects d3 will touch (exit/enter/update)
-               // Adjust the filter function to expand the scope beyond whatever entities were passed in.
-               var filterRendered = function(d) {
-                   return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
-               };
-               drawLayer
-                   .call(draw, graph, currentVisible(all), sets, filterRendered);
+         var _mapillary;

 
 

-               // Draw touch targets..
-               // When drawing, render all targets (not just those affected by a partial redraw)
-               var filterTouch = function(d) {
-                   return isMoving ? true : filterRendered(d);
-               };
-               touchLayer
-                   .call(drawTargets, graph, currentVisible(all), filterTouch);
+         function init() {
+           if (svgMapillaryMapFeatures.initialized) return; // run once
+
+           svgMapillaryMapFeatures.enabled = false;
+           svgMapillaryMapFeatures.initialized = true;
+         }

 
 

+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;

 
 

-               function currentVisible(which) {
-                   return Object.keys(which)
-                       .map(graph.hasEntity, graph)     // the current version of this entity
-                       .filter(function (entity) { return entity && entity.intersects(extent, graph); });
-               }
+             _mapillary.event.on('loadedMapFeatures', throttledRedraw);
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;

            }
 
            }
 

+           return _mapillary;
+         }
+
+         function showLayer() {
+           var service = getService();
+           if (!service) return;
+           service.loadObjectResources(context);
+           editOn();
+         }

 
 

-           // partial redraw - only update the selected items..
-           drawVertices.drawSelected = function(selection, graph, extent) {
-               var wireframe = context.surface().classed('fill-wireframe');
-               var zoom = geoScaleToZoom(projection.scale());
+         function hideLayer() {
+           throttledRedraw.cancel();
+           editOff();
+         }

 
 

-               _prevSelected = _currSelected || {};
-               if (context.map().isInWideSelection()) {
-                   _currSelected = {};
-                   context.selectedIDs().forEach(function(id) {
-                       var entity = graph.hasEntity(id);
-                       if (!entity) { return; }
+         function editOn() {
+           layer.style('display', 'block');
+         }

 
 

-                       if (entity.type === 'node') {
-                           if (renderAsVertex(entity, graph, wireframe, zoom)) {
-                               _currSelected[entity.id] = entity;
-                           }
-                       }
-                   });
+         function editOff() {
+           layer.selectAll('.icon-map-feature').remove();
+           layer.style('display', 'none');
+         }

 
 

+         function click(d3_event, d) {
+           var service = getService();
+           if (!service) return;
+           context.map().centerEase(d.loc);
+           var selectedImageId = service.getActiveImage() && service.getActiveImage().id;
+           service.getDetections(d.id).then(function (detections) {
+             if (detections.length) {
+               var imageId = detections[0].image.id;
+
+               if (imageId === selectedImageId) {
+                 service.highlightDetection(detections[0]).selectImage(context, imageId);

                } else {
                } else {

-                   _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
+                 service.ensureViewerLoaded(context).then(function () {
+                   service.highlightDetection(detections[0]).selectImage(context, imageId).showViewer(context);
+                 });

                }
                }

+             }
+           });
+         }

 
 

-               // note that drawVertices will add `_currSelected` automatically if needed..
-               var filter = function(d) { return d.id in _prevSelected; };
-               drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
-           };
+         function filterData(detectedFeatures) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();

 
 

+           if (fromDate) {
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.last_seen_at).getTime() >= new Date(fromDate).getTime();
+             });
+           }

 
 

-           // partial redraw - only update the hovered items..
-           drawVertices.drawHover = function(selection, graph, target, extent) {
-               if (target === _currHoverTarget) { return; }  // continue only if something changed
+           if (toDate) {
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.first_seen_at).getTime() <= new Date(toDate).getTime();
+             });
+           }

 
 

-               var wireframe = context.surface().classed('fill-wireframe');
-               var zoom = geoScaleToZoom(projection.scale());
+           return detectedFeatures;
+         }

 
 

-               _prevHover = _currHover || {};
-               _currHoverTarget = target;
-               var entity = target && target.properties && target.properties.entity;
+         function update() {
+           var service = getService();
+           var data = service ? service.mapFeatures(projection) : [];
+           data = filterData(data);
+           var transform = svgPointTransform(projection);
+           var mapFeatures = layer.selectAll('.icon-map-feature').data(data, function (d) {
+             return d.id;
+           }); // exit
+
+           mapFeatures.exit().remove(); // enter
+
+           var enter = mapFeatures.enter().append('g').attr('class', 'icon-map-feature icon-detected').on('click', click);
+           enter.append('title').text(function (d) {
+             var id = d.value.replace(/--/g, '.').replace(/-/g, '_');
+             return _t('mapillary_map_features.' + id);
+           });
+           enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
+             if (d.value === 'object--billboard') {
+               // no billboard icon right now, so use the advertisement icon
+               return '#object--sign--advertisement';
+             }

 
 

-               if (entity) {
-                   _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
-               } else {
-                   _currHover = {};
-               }
+             return '#' + d.value;
+           });
+           enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update

 
 

-               // note that drawVertices will add `_currHover` automatically if needed..
-               var filter = function(d) { return d.id in _prevHover; };
-               drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
-           };
+           mapFeatures.merge(enter).attr('transform', transform);
+         }

 
 

-           return drawVertices;
-       }
+         function drawMapFeatures(selection) {
+           var enabled = svgMapillaryMapFeatures.enabled;
+           var service = getService();
+           layer = selection.selectAll('.layer-mapillary-map-features').data(service ? [0] : []);
+           layer.exit().remove();
+           layer = layer.enter().append('g').attr('class', 'layer-mapillary-map-features layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);

 
 

-       function utilBindOnce(target, type, listener, capture) {
-           var typeOnce = type + '.once';
-           function one() {
-               target.on(typeOnce, null);
-               listener.apply(this, arguments);
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadMapFeatures(projection);
+               service.showFeatureDetections(true);
+             } else {
+               editOff();
+             }
+           } else if (service) {
+             service.showFeatureDetections(false);

            }
            }

-           target.on(typeOnce, one, capture);
-           return this;
-       }
-
-       // Adapted from d3-zoom to handle pointer events.
+         }

 
 

-       // Ignore right-click, since that should open the context menu.
-       function defaultFilter$2() {
-         return !event.ctrlKey && !event.button;
-       }
+         drawMapFeatures.enabled = function (_) {
+           if (!arguments.length) return svgMapillaryMapFeatures.enabled;
+           svgMapillaryMapFeatures.enabled = _;

 
 

-       function defaultExtent$1() {
-         var e = this;
-         if (e instanceof SVGElement) {
-           e = e.ownerSVGElement || e;
-           if (e.hasAttribute('viewBox')) {
-             e = e.viewBox.baseVal;
-             return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+           if (svgMapillaryMapFeatures.enabled) {
+             showLayer();
+             context.photos().on('change.mapillary_map_features', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.mapillary_map_features', null);

            }
            }

-           return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
-         }
-         return [[0, 0], [e.clientWidth, e.clientHeight]];
-       }

 
 

-       function defaultWheelDelta$1() {
-         return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002);
-       }
+           dispatch.call('change');
+           return this;
+         };

 
 

-       function defaultConstrain$1(transform, extent, translateExtent) {
-         var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
-             dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
-             dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
-             dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
-         return transform.translate(
-           dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1),
-           dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1)
-         );
+         drawMapFeatures.supported = function () {
+           return !!getService();
+         };
+
+         init();
+         return drawMapFeatures;

        }
 
        }
 

-       function utilZoomPan() {
-         var filter = defaultFilter$2,
-             extent = defaultExtent$1,
-             constrain = defaultConstrain$1,
-             wheelDelta = defaultWheelDelta$1,
-             scaleExtent = [0, Infinity],
-             translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
-             interpolate = interpolateZoom,
-             listeners = dispatch('start', 'zoom', 'end'),
-             _wheelDelay = 150,
-             _transform = identity$2,
-             _activeGesture;
+       function svgOpenstreetcamImages(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);

 
 

-         function zoom(selection) {
-           selection
-               .on('pointerdown.zoom', pointerdown)
-               .on('wheel.zoom', wheeled)
-               .style('touch-action', 'none')
-               .style('-webkit-tap-highlight-color', 'rgba(0,0,0,0)');
+         var minZoom = 12;
+         var minMarkerZoom = 16;
+         var minViewfieldZoom = 18;
+         var layer = select(null);

 
 

-           select(window)
-               .on('pointermove.zoompan', pointermove)
-               .on('pointerup.zoompan pointercancel.zoompan', pointerup);
+         var _openstreetcam;
+
+         function init() {
+           if (svgOpenstreetcamImages.initialized) return; // run once
+
+           svgOpenstreetcamImages.enabled = false;
+           svgOpenstreetcamImages.initialized = true;

          }
 
          }
 

-         zoom.transform = function(collection, transform, point) {
-           var selection = collection.selection ? collection.selection() : collection;
-           if (collection !== selection) {
-             schedule(collection, transform, point);
-           } else {
-             selection.interrupt().each(function() {
-               gesture(this, arguments)
-                   .start()
-                   .zoom(null, typeof transform === 'function' ? transform.apply(this, arguments) : transform)
-                   .end();
-             });
-           }
-         };
+         function getService() {
+           if (services.openstreetcam && !_openstreetcam) {
+             _openstreetcam = services.openstreetcam;

 
 

-         zoom.scaleBy = function(selection, k, p) {
-           zoom.scaleTo(selection, function() {
-             var k0 = _transform.k,
-                 k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
-             return k0 * k1;
-           }, p);
-         };
+             _openstreetcam.event.on('loadedImages', throttledRedraw);
+           } else if (!services.openstreetcam && _openstreetcam) {
+             _openstreetcam = null;
+           }

 
 

-         zoom.scaleTo = function(selection, k, p) {
-           zoom.transform(selection, function() {
-             var e = extent.apply(this, arguments),
-                 t0 = _transform,
-                 p0 = p == null ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p,
-                 p1 = t0.invert(p0),
-                 k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
-             return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
-           }, p);
-         };
+           return _openstreetcam;
+         }

 
 

-         zoom.translateBy = function(selection, x, y) {
-           zoom.transform(selection, function() {
-             return constrain(_transform.translate(
-               typeof x === 'function' ? x.apply(this, arguments) : x,
-               typeof y === 'function' ? y.apply(this, arguments) : y
-             ), extent.apply(this, arguments), translateExtent);
+         function showLayer() {
+           var service = getService();
+           if (!service) return;
+           editOn();
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+             dispatch.call('change');

            });
            });

-         };
-
-         zoom.translateTo = function(selection, x, y, p) {
-           zoom.transform(selection, function() {
-             var e = extent.apply(this, arguments),
-                 t = _transform,
-                 p0 = p == null ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p;
-             return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(
-               typeof x === 'function' ? -x.apply(this, arguments) : -x,
-               typeof y === 'function' ? -y.apply(this, arguments) : -y
-             ), e, translateExtent);
-           }, p);
-         };
+         }

 
 

-         function scale(transform, k) {
-           k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
-           return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', editOff);

          }
 
          }
 

-         function translate(transform, p0, p1) {
-           var x = p0[0] - p1[0] * transform.k, y = p0[1] - p1[1] * transform.k;
-           return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+         function editOn() {
+           layer.style('display', 'block');

          }
 
          }
 

-         function centroid(extent) {
-           return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');

          }
 
          }
 

-         function schedule(transition, transform, point) {
-           transition
-               .on('start.zoom', function() { gesture(this, arguments).start(); })
-               .on('interrupt.zoom end.zoom', function() { gesture(this, arguments).end(); })
-               .tween('zoom', function() {
-                 var that = this,
-                     args = arguments,
-                     g = gesture(that, args),
-                     e = extent.apply(that, args),
-                     p = point == null ? centroid(e) : typeof point === 'function' ? point.apply(that, args) : point,
-                     w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
-                     a = _transform,
-                     b = typeof transform === 'function' ? transform.apply(that, args) : transform,
-                     i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
-                 return function(t) {
-                   if (t === 1) { t = b; } // Avoid rounding error on end.
-                   else { var l = i(t), k = w / l[2]; t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k); }
-                   g.zoom(null, t);
-                 };
-               });
+         function click(d3_event, d) {
+           var service = getService();
+           if (!service) return;
+           service.ensureViewerLoaded(context).then(function () {
+             service.selectImage(context, d.key).showViewer(context);
+           });
+           context.map().centerEase(d.loc);

          }
 
          }
 

-         function gesture(that, args, clean) {
-           return (!clean && _activeGesture) || new Gesture(that, args);
+         function mouseover(d3_event, d) {
+           var service = getService();
+           if (service) service.setStyles(context, d);

          }
 
          }
 

-         function Gesture(that, args) {
-           this.that = that;
-           this.args = args;
-           this.active = 0;
-           this.extent = extent.apply(that, args);
+         function mouseout() {
+           var service = getService();
+           if (service) service.setStyles(context, null);

          }
 
          }
 

-         Gesture.prototype = {
-           start: function() {
-             if (++this.active === 1) {
-               _activeGesture = this;
-               this.emit('start');
-             }
-             return this;
-           },
-           zoom: function(key, transform) {
-             if (this.mouse && key !== 'mouse') { this.mouse[1] = transform.invert(this.mouse[0]); }
-             if (this.pointer0 && key !== 'touch') { this.pointer0[1] = transform.invert(this.pointer0[0]); }
-             if (this.pointer1 && key !== 'touch') { this.pointer1[1] = transform.invert(this.pointer1[0]); }
-             _transform = transform;
-             this.emit('zoom');
-             return this;
-           },
-           end: function() {
-             if (--this.active === 0) {
-               _activeGesture = null;
-               this.emit('end');
-             }
-             return this;
-           },
-           emit: function(type) {
-             customEvent(new ZoomEvent(zoom, type, _transform), listeners.apply, listeners, [type, this.that, this.args]);
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);
+
+           if (d.ca) {
+             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';

            }
            }

-         };

 
 

-         function wheeled() {
-           if (!filter.apply(this, arguments)) { return; }
-           var g = gesture(this, arguments),
-               t = _transform,
-               k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
-               p = utilFastMouse(this)(event);
+           return t;
+         }

 
 

-           // If the mouse is in the same location as before, reuse it.
-           // If there were recent wheel events, reset the wheel idle timeout.
-           if (g.wheel) {
-             if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
-               g.mouse[1] = t.invert(g.mouse[0] = p);
-             }
-             clearTimeout(g.wheel);
+         function filterImages(images) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();

 
 

-           // Otherwise, capture the mouse point and location at the start.
-           } else {
-             g.mouse = [p, t.invert(p)];
-             interrupt(this);
-             g.start();
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             images = images.filter(function (item) {
+               return new Date(item.captured_at).getTime() >= fromTimestamp;
+             });

            }
 
            }
 

-           event.preventDefault();
-           event.stopImmediatePropagation();
-           g.wheel = setTimeout(wheelidled, _wheelDelay);
-           g.zoom('mouse', constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
-
-           function wheelidled() {
-             g.wheel = null;
-             g.end();
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             images = images.filter(function (item) {
+               return new Date(item.captured_at).getTime() <= toTimestamp;
+             });

            }
            }

-         }
-
-         var _downPointerIDs = new Set();
-         var _pointerLocGetter;

 
 

-         function pointerdown() {
-           _downPointerIDs.add(event.pointerId);
+           if (usernames) {
+             images = images.filter(function (item) {
+               return usernames.indexOf(item.captured_by) !== -1;
+             });
+           }

 
 

-           if (!filter.apply(this, arguments)) { return; }
+           return images;
+         }

 
 

-           var g = gesture(this, arguments, _downPointerIDs.size === 1);
-           var started;
+         function filterSequences(sequences) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();

 
 

-           event.stopImmediatePropagation();
-           _pointerLocGetter = utilFastMouse(this);
-           var loc = _pointerLocGetter(event);
-           var p = [loc, _transform.invert(loc), event.pointerId];
-           if (!g.pointer0) {
-              g.pointer0 = p;
-              started = true;
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             sequences = sequences.filter(function (image) {
+               return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
+             });
+           }

 
 

-           } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
-              g.pointer1 = p;
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             sequences = sequences.filter(function (image) {
+               return new Date(image.properties.captured_at).getTime() <= toTimestamp;
+             });

            }
 
            }
 

-           if (started) {
-             interrupt(this);
-             g.start();
+           if (usernames) {
+             sequences = sequences.filter(function (image) {
+               return usernames.indexOf(image.properties.captured_by) !== -1;
+             });

            }
            }

+
+           return sequences;

          }
 
          }
 

-         function pointermove() {
-           if (!_downPointerIDs.has(event.pointerId)) { return; }
+         function update() {
+           var viewer = context.container().select('.photoviewer');
+           var selected = viewer.empty() ? undefined : viewer.datum();
+           var z = ~~context.map().zoom();
+           var showMarkers = z >= minMarkerZoom;
+           var showViewfields = z >= minViewfieldZoom;
+           var service = getService();
+           var sequences = [];
+           var images = [];

 
 

-           if (!_activeGesture || !_pointerLocGetter) { return; }
+           if (context.photos().showsFlat()) {
+             sequences = service ? service.sequences(projection) : [];
+             images = service && showMarkers ? service.images(projection) : [];
+             sequences = filterSequences(sequences);
+             images = filterImages(images);
+           }

 
 

-           var g = gesture(this, arguments);
+           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+             return d.properties.key;
+           }); // exit

 
 

-           var isPointer0 = g.pointer0 && g.pointer0[2] === event.pointerId;
-           var isPointer1 = !isPointer0 && g.pointer1 && g.pointer1[2] === event.pointerId;
+           traces.exit().remove(); // enter/update

 
 

-           if ((isPointer0 || isPointer1) && 'buttons' in event && !event.buttons) {
-             // The pointer went up without ending the gesture somehow, e.g.
-             // a down mouse was moved off the map and released. End it here.
-             if (g.pointer0) { _downPointerIDs.delete(g.pointer0[2]); }
-             if (g.pointer1) { _downPointerIDs.delete(g.pointer1[2]); }
-             g.end();
-             return;
-           }
+           traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+           var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
+             return d.key;
+           }); // exit

 
 

-           event.preventDefault();
-           event.stopImmediatePropagation();
+           groups.exit().remove(); // enter

 
 

-           var loc = _pointerLocGetter(event);
-           var t, p, l;
+           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update

 
 

-           if (isPointer0) { g.pointer0[0] = loc; }
-           else if (isPointer1) { g.pointer1[0] = loc; }
+           var markers = groups.merge(groupsEnter).sort(function (a, b) {
+             return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1]; // sort Y
+           }).attr('transform', transform).select('.viewfield-scale');
+           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+           viewfields.exit().remove();
+           viewfields.enter() // viewfields may or may not be drawn...
+           .insert('path', 'circle') // but if they are, draw below the circles
+           .attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
+         }

 
 

-           t = _transform;
-           if (g.pointer1) {
-             var p0 = g.pointer0[0], l0 = g.pointer0[1],
-                 p1 = g.pointer1[0], l1 = g.pointer1[1],
-                 dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
-                 dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
-             t = scale(t, Math.sqrt(dp / dl));
-             p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
-             l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
-           } else if (g.pointer0) {
-             p = g.pointer0[0];
-             l = g.pointer0[1];
+         function drawImages(selection) {
+           var enabled = svgOpenstreetcamImages.enabled,
+               service = getService();
+           layer = selection.selectAll('.layer-openstreetcam').data(service ? [0] : []);
+           layer.exit().remove();
+           var layerEnter = layer.enter().append('g').attr('class', 'layer-openstreetcam').style('display', enabled ? 'block' : 'none');
+           layerEnter.append('g').attr('class', 'sequences');
+           layerEnter.append('g').attr('class', 'markers');
+           layer = layerEnter.merge(layer);
+
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadImages(projection);
+             } else {
+               editOff();
+             }

            }
            }

-           else { return; }
-           g.zoom('touch', constrain(translate(t, p, l), g.extent, translateExtent));

          }
 
          }
 

-         function pointerup() {
-           if (!_downPointerIDs.has(event.pointerId)) { return; }
+         drawImages.enabled = function (_) {
+           if (!arguments.length) return svgOpenstreetcamImages.enabled;
+           svgOpenstreetcamImages.enabled = _;

 
 

-           _downPointerIDs.delete(event.pointerId);
+           if (svgOpenstreetcamImages.enabled) {
+             showLayer();
+             context.photos().on('change.openstreetcam_images', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.openstreetcam_images', null);
+           }

 
 

-           if (!_activeGesture) { return; }
+           dispatch.call('change');
+           return this;
+         };

 
 

-           var g = gesture(this, arguments);
+         drawImages.supported = function () {
+           return !!getService();
+         };

 
 

-           event.stopImmediatePropagation();
+         init();
+         return drawImages;
+       }

 
 

-           if (g.pointer0 && g.pointer0[2] === event.pointerId) { delete g.pointer0; }
-           else if (g.pointer1 && g.pointer1[2] === event.pointerId) { delete g.pointer1; }
+       function svgOsm(projection, context, dispatch) {
+         var enabled = true;

 
 

-           if (g.pointer1 && !g.pointer0) {
-             g.pointer0 = g.pointer1;
-             delete g.pointer1;
-           }
-           if (g.pointer0) { g.pointer0[1] = _transform.invert(g.pointer0[0]); }
-           else {
-             g.end();
-           }
+         function drawOsm(selection) {
+           selection.selectAll('.layer-osm').data(['covered', 'areas', 'lines', 'points', 'labels']).enter().append('g').attr('class', function (d) {
+             return 'layer-osm ' + d;
+           });
+           selection.selectAll('.layer-osm.points').selectAll('.points-group').data(['points', 'midpoints', 'vertices', 'turns']).enter().append('g').attr('class', function (d) {
+             return 'points-group ' + d;
+           });

          }
 
          }
 

-         zoom.wheelDelta = function(_) {
-           return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
-         };
+         function showLayer() {
+           var layer = context.surface().selectAll('.data-layer.osm');
+           layer.interrupt();
+           layer.classed('disabled', false).style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+             dispatch.call('change');
+           });
+         }

 
 

-         zoom.filter = function(_) {
-           return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
-         };
+         function hideLayer() {
+           var layer = context.surface().selectAll('.data-layer.osm');
+           layer.interrupt();
+           layer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+             layer.classed('disabled', true);
+             dispatch.call('change');
+           });
+         }

 
 

-         zoom.extent = function(_) {
-           return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
-         };
+         drawOsm.enabled = function (val) {
+           if (!arguments.length) return enabled;
+           enabled = val;

 
 

-         zoom.scaleExtent = function(_) {
-           return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
-         };
+           if (enabled) {
+             showLayer();
+           } else {
+             hideLayer();
+           }

 
 

-         zoom.translateExtent = function(_) {
-           return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+           dispatch.call('change');
+           return this;

          };
 
          };
 

-         zoom.constrain = function(_) {
-           return arguments.length ? (constrain = _, zoom) : constrain;
-         };
+         return drawOsm;
+       }

 
 

-         zoom.interpolate = function(_) {
-           return arguments.length ? (interpolate = _, zoom) : interpolate;
-         };
+       var _notesEnabled = false;

 
 

-         zoom._transform = function(_) {
-           return arguments.length ? (_transform = _, zoom) : _transform;
-         };
+       var _osmService;

 
 

-         zoom.on = function() {
-           var value = listeners.on.apply(listeners, arguments);
-           return value === listeners ? zoom : value;
-         };
+       function svgNotes(projection, context, dispatch) {
+         if (!dispatch) {
+           dispatch = dispatch$8('change');
+         }

 
 

-         return zoom;
-       }
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
+
+         var minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var _notesVisible = false;

 
 

-       // A custom double-click / double-tap event detector that works on touch devices
-       // if pointer events are supported. Falls back to default `dblclick` event.
-       function utilDoubleUp() {
+         function markerPath(selection, klass) {
+           selection.attr('class', klass).attr('transform', 'translate(-8, -22)').attr('d', 'm17.5,0l-15,0c-1.37,0 -2.5,1.12 -2.5,2.5l0,11.25c0,1.37 1.12,2.5 2.5,2.5l3.75,0l0,3.28c0,0.38 0.43,0.6 0.75,0.37l4.87,-3.65l5.62,0c1.37,0 2.5,-1.12 2.5,-2.5l0,-11.25c0,-1.37 -1.12,-2.5 -2.5,-2.5z');
+         } // Loosely-coupled osm service for fetching notes.

 
 

-           var dispatch$1 = dispatch('doubleUp');

 
 

-           var _maxTimespan = 500; // milliseconds
-           var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
-           var _pointer; // object representing the pointer that could trigger double up
+         function getService() {
+           if (services.osm && !_osmService) {
+             _osmService = services.osm;

 
 

-           function pointerIsValidFor(loc) {
-               // second pointerup must occur within a small timeframe after the first pointerdown
-               return new Date().getTime() - _pointer.startTime <= _maxTimespan &&
-                   // all pointer events must occur within a small distance of the first pointerdown
-                   geoVecLength(_pointer.startLoc, loc) <= _maxDistance;
+             _osmService.on('loadedNotes', throttledRedraw);
+           } else if (!services.osm && _osmService) {
+             _osmService = null;

            }
 
            }
 

-           function pointerdown() {
+           return _osmService;
+         } // Show the notes

 
 

-               // ignore right-click
-               if (event.ctrlKey || event.button === 2) { return; }

 
 

-               var loc = [event.clientX, event.clientY];
+         function editOn() {
+           if (!_notesVisible) {
+             _notesVisible = true;
+             drawLayer.style('display', 'block');
+           }
+         } // Immediately remove the notes and their touch targets

 
 

-               // Don't rely on pointerId here since it can change between pointerdown
-               // events on touch devices
-               if (_pointer && !pointerIsValidFor(loc)) {
-                   // if this pointer is no longer valid, clear it so another can be started
-                   _pointer = undefined;
-               }

 
 

-               if (!_pointer) {
-                   _pointer = {
-                       startLoc: loc,
-                       startTime: new Date().getTime(),
-                       upCount: 0,
-                       pointerId: event.pointerId
-                   };
-               } else { // double down
-                   _pointer.pointerId = event.pointerId;
-               }
+         function editOff() {
+           if (_notesVisible) {
+             _notesVisible = false;
+             drawLayer.style('display', 'none');
+             drawLayer.selectAll('.note').remove();
+             touchLayer.selectAll('.note').remove();

            }
            }

+         } // Enable the layer.  This shows the notes and transitions them to visible.

 
 

-           function pointerup() {
-
-               // ignore right-click
-               if (event.ctrlKey || event.button === 2) { return; }

 
 

-               if (!_pointer || _pointer.pointerId !== event.pointerId) { return; }
+         function layerOn() {
+           editOn();
+           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+             dispatch.call('change');
+           });
+         } // Disable the layer.  This transitions the layer invisible and then hides the notes.

 
 

-               _pointer.upCount += 1;

 
 

-               if (_pointer.upCount === 2) { // double up!
-                   var loc = [event.clientX, event.clientY];
-                   if (pointerIsValidFor(loc)) {
-                       var locInThis = utilFastMouse(this)(event);
-                       dispatch$1.call('doubleUp', this, locInThis);
-                   }
-                   // clear the pointer info in any case
-                   _pointer = undefined;
-               }
-           }
+         function layerOff() {
+           throttledRedraw.cancel();
+           drawLayer.interrupt();
+           touchLayer.selectAll('.note').remove();
+           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+             editOff();
+             dispatch.call('change');
+           });
+         } // Update the note markers

 
 

-           function doubleUp(selection) {
-               if ('PointerEvent' in window) {
-                   // dblclick isn't well supported on touch devices so manually use
-                   // pointer events if they're available
-                   selection
-                       .on('pointerdown.doubleUp', pointerdown)
-                       .on('pointerup.doubleUp', pointerup);
-               } else {
-                   // fallback to dblclick
-                   selection
-                       .on('dblclick.doubleUp', function() {
-                           dispatch$1.call('doubleUp', this, utilFastMouse(this)(event));
-                       });
-               }
-           }

 
 

-           doubleUp.off = function(selection) {
-               selection
-                   .on('pointerdown.doubleUp', null)
-                   .on('pointerup.doubleUp', null)
-                   .on('dblclick.doubleUp', null);
-           };
+         function updateMarkers() {
+           if (!_notesVisible || !_notesEnabled) return;
+           var service = getService();
+           var selectedID = context.selectedNoteID();
+           var data = service ? service.notes(projection) : [];
+           var getTransform = svgPointTransform(projection); // Draw markers..

 
 

-           return utilRebind(doubleUp, dispatch$1, 'on');
-       }
+           var notes = drawLayer.selectAll('.note').data(data, function (d) {
+             return d.status + d.id;
+           }); // exit

 
 

-       // constants
-       var TILESIZE = 256;
-       var minZoom = 2;
-       var maxZoom = 24;
-       var kMin = geoZoomToScale(minZoom, TILESIZE);
-       var kMax = geoZoomToScale(maxZoom, TILESIZE);
+           notes.exit().remove(); // enter

 
 

-       function clamp(num, min, max) {
-           return Math.max(min, Math.min(num, max));
-       }
+           var notesEnter = notes.enter().append('g').attr('class', function (d) {
+             return 'note note-' + d.id + ' ' + d.status;
+           }).classed('new', function (d) {
+             return d.id < 0;
+           });
+           notesEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+           notesEnter.append('path').call(markerPath, 'shadow');
+           notesEnter.append('use').attr('class', 'note-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-note');
+           notesEnter.selectAll('.icon-annotation').data(function (d) {
+             return [d];
+           }).enter().append('use').attr('class', 'icon-annotation').attr('width', '10px').attr('height', '10px').attr('x', '-3px').attr('y', '-19px').attr('xlink:href', function (d) {
+             if (d.id < 0) return '#iD-icon-plus';
+             if (d.status === 'open') return '#iD-icon-close';
+             return '#iD-icon-apply';
+           }); // update
+
+           notes.merge(notesEnter).sort(sortY).classed('selected', function (d) {
+             var mode = context.mode();
+             var isMoving = mode && mode.id === 'drag-note'; // no shadows when dragging
+
+             return !isMoving && d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..
+
+           if (touchLayer.empty()) return;
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var targets = touchLayer.selectAll('.note').data(data, function (d) {
+             return d.id;
+           }); // exit

 
 

+           targets.exit().remove(); // enter/update

 
 

-       function rendererMap(context) {
-           var dispatch$1 = dispatch(
-               'move', 'drawn',
-               'crossEditableZoom', 'hitMinZoom',
-               'changeHighlighting', 'changeAreaFill'
-           );
-           var projection = context.projection;
-           var curtainProjection = context.curtainProjection;
-           var drawLayers;
-           var drawPoints;
-           var drawVertices;
-           var drawLines;
-           var drawAreas;
-           var drawMidpoints;
-           var drawLabels;
-
-           var _selection = select(null);
-           var supersurface = select(null);
-           var wrapper = select(null);
-           var surface = select(null);
-
-           var _dimensions = [1, 1];
-           var _dblClickZoomEnabled = true;
-           var _redrawEnabled = true;
-           var _gestureTransformStart;
-           var _transformStart = projection.transform();
-           var _transformLast;
-           var _isTransformed = false;
-           var _minzoom = 0;
-           var _getMouseCoords;
-           var _lastPointerEvent;
-           var _lastWithinEditableZoom;
-
-           // whether a pointerdown event started the zoom
-           var _pointerDown = false;
-
-           // use pointer events on supported platforms; fallback to mouse events
-           var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-           // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
-           var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
-
-           var _zoomerPanner = _zoomerPannerFunction()
-               .scaleExtent([kMin, kMax])
-               .interpolate(interpolate)
-               .filter(zoomEventFilter)
-               .on('zoom.map', zoomPan)
-               .on('start.map', function() {
-                   _pointerDown = event.sourceEvent && event.sourceEvent.type === 'pointerdown';
-               })
-               .on('end.map', function() {
-                   _pointerDown = false;
-               });
-           var _doubleUpHandler = utilDoubleUp();
-
-           var scheduleRedraw = throttle(redraw, 750);
-           // var isRedrawScheduled = false;
-           // var pendingRedrawCall;
-           // function scheduleRedraw() {
-           //     // Only schedule the redraw if one has not already been set.
-           //     if (isRedrawScheduled) return;
-           //     isRedrawScheduled = true;
-           //     var that = this;
-           //     var args = arguments;
-           //     pendingRedrawCall = window.requestIdleCallback(function () {
-           //         // Reset the boolean so future redraws can be set.
-           //         isRedrawScheduled = false;
-           //         redraw.apply(that, args);
-           //     }, { timeout: 1400 });
-           // }
+           targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
+             var newClass = d.id < 0 ? 'new' : '';
+             return 'note target note-' + d.id + ' ' + fillClass + newClass;
+           }).attr('transform', getTransform);

 
 

-           function cancelPendingRedraw() {
-               scheduleRedraw.cancel();
-               // isRedrawScheduled = false;
-               // window.cancelIdleCallback(pendingRedrawCall);
+           function sortY(a, b) {
+             if (a.id === selectedID) return 1;
+             if (b.id === selectedID) return -1;
+             return b.loc[1] - a.loc[1];

            }
            }

+         } // Draw the notes layer and schedule loading notes and updating markers.

 
 
 
 

-           function map(selection) {
-               _selection = selection;
+         function drawNotes(selection) {
+           var service = getService();
+           var surface = context.surface();

 
 

-               context
-                   .on('change.map', immediateRedraw);
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           }

 
 

-               var osm = context.connection();
-               if (osm) {
-                   osm.on('change.map', immediateRedraw);
-               }
+           drawLayer = selection.selectAll('.layer-notes').data(service ? [0] : []);
+           drawLayer.exit().remove();
+           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-notes').style('display', _notesEnabled ? 'block' : 'none').merge(drawLayer);

 
 

-               function didUndoOrRedo(targetTransform) {
-                   var mode = context.mode().id;
-                   if (mode !== 'browse' && mode !== 'select') { return; }
-                   if (targetTransform) {
-                       map.transformEase(targetTransform);
-                   }
-               }
+           if (_notesEnabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadNotes(projection);
+               updateMarkers();
+             } else {
+               editOff();
+             }
+           }
+         } // Toggles the layer on and off

 
 

-               context.history()
-                   .on('merge.map', function() { scheduleRedraw(); })
-                   .on('change.map', immediateRedraw)
-                   .on('undone.map', function(stack, fromStack) {
-                       didUndoOrRedo(fromStack.transform);
-                   })
-                   .on('redone.map', function(stack) {
-                       didUndoOrRedo(stack.transform);
-                   });

 
 

-               context.background()
-                   .on('change.map', immediateRedraw);
+         drawNotes.enabled = function (val) {
+           if (!arguments.length) return _notesEnabled;
+           _notesEnabled = val;

 
 

-               context.features()
-                   .on('redraw.map', immediateRedraw);
+           if (_notesEnabled) {
+             layerOn();
+           } else {
+             layerOff();

 
 

-               drawLayers
-                   .on('change.map', function() {
-                       context.background().updateImagery();
-                       immediateRedraw();
-                   });
+             if (context.selectedNoteID()) {
+               context.enter(modeBrowse(context));
+             }
+           }

 
 

-               selection
-                   .on('wheel.map mousewheel.map', function() {
-                       // disable swipe-to-navigate browser pages on trackpad/magic mouse – #5552
-                       event.preventDefault();
-                   })
-                   .call(_zoomerPanner)
-                   .call(_zoomerPanner.transform, projection.transform())
-                   .on('dblclick.zoom', null); // override d3-zoom dblclick handling
-
-               map.supersurface = supersurface = selection.append('div')
-                   .attr('class', 'supersurface')
-                   .call(utilSetTransform, 0, 0);
-
-               // Need a wrapper div because Opera can't cope with an absolutely positioned
-               // SVG element: http://bl.ocks.org/jfirebaugh/6fbfbd922552bf776c16
-               wrapper = supersurface
-                   .append('div')
-                   .attr('class', 'layer layer-data');
-
-               map.surface = surface = wrapper
-                   .call(drawLayers)
-                   .selectAll('.surface');
-
-               surface
-                   .call(drawLabels.observe)
-                   .call(_doubleUpHandler)
-                   .on(_pointerPrefix + 'down.zoom', function() {
-                       _lastPointerEvent = event;
-                       if (event.button === 2) {
-                           event.stopPropagation();
-                       }
-                   }, true)
-                   .on(_pointerPrefix + 'up.zoom', function() {
-                       _lastPointerEvent = event;
-                       if (resetTransform()) {
-                           immediateRedraw();
-                       }
-                   })
-                   .on(_pointerPrefix + 'move.map', function() {
-                       _lastPointerEvent = event;
-                   })
-                   .on(_pointerPrefix + 'over.vertices', function() {
-                       if (map.editableDataEnabled() && !_isTransformed) {
-                           var hover = event.target.__data__;
-                           surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
-                           dispatch$1.call('drawn', this, { full: false });
-                       }
-                   })
-                   .on(_pointerPrefix + 'out.vertices', function() {
-                       if (map.editableDataEnabled() && !_isTransformed) {
-                           var hover = event.relatedTarget && event.relatedTarget.__data__;
-                           surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
-                           dispatch$1.call('drawn', this, { full: false });
-                       }
-                   });
+           dispatch.call('change');
+           return this;
+         };

 
 

-               var detected = utilDetect();
+         return drawNotes;
+       }

 
 

-               // only WebKit supports gesture events
-               if ('GestureEvent' in window &&
-                   // Listening for gesture events on iOS 13.4+ breaks double-tapping,
-                   // but we only need to do this on desktop Safari anyway. – #7694
-                   !detected.isMobileWebKit) {
+       function svgTouch() {
+         function drawTouch(selection) {
+           selection.selectAll('.layer-touch').data(['areas', 'lines', 'points', 'turns', 'markers']).enter().append('g').attr('class', function (d) {
+             return 'layer-touch ' + d;
+           });
+         }

 
 

-                   // Desktop Safari sends gesture events for multitouch trackpad pinches.
-                   // We can listen for these and translate them into map zooms.
-                   surface
-                       .on('gesturestart.surface', function() {
-                           event.preventDefault();
-                           _gestureTransformStart = projection.transform();
-                       })
-                       .on('gesturechange.surface', gestureChange);
-               }
+         return drawTouch;
+       }

 
 

-               // must call after surface init
-               updateAreaFill();
+       function refresh(selection, node) {
+         var cr = node.getBoundingClientRect();
+         var prop = [cr.width, cr.height];
+         selection.property('__dimensions__', prop);
+         return prop;
+       }

 
 

-               _doubleUpHandler.on('doubleUp.map', function(p0) {
-                   if (!_dblClickZoomEnabled) { return; }
+       function utilGetDimensions(selection, force) {
+         if (!selection || selection.empty()) {
+           return [0, 0];
+         }

 
 

-                   // don't zoom if targeting something other than the map itself
-                   if (typeof event.target.__data__ === 'object' &&
-                       // or area fills
-                       !select(event.target).classed('fill')) { return; }
+         var node = selection.node(),
+             cached = selection.property('__dimensions__');
+         return !cached || force ? refresh(selection, node) : cached;
+       }
+       function utilSetDimensions(selection, dimensions) {
+         if (!selection || selection.empty()) {
+           return selection;
+         }

 
 

-                   var zoomOut = event.shiftKey;
+         var node = selection.node();

 
 

-                   var t = projection.transform();
+         if (dimensions === null) {
+           refresh(selection, node);
+           return selection;
+         }

 
 

-                   var p1 = t.invert(p0);
+         return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
+       }

 
 

-                   t = t.scale(zoomOut ? 0.5 : 2);
+       function svgLayers(projection, context) {
+         var dispatch = dispatch$8('change');
+         var svg = select(null);
+         var _layers = [{
+           id: 'osm',
+           layer: svgOsm(projection, context, dispatch)
+         }, {
+           id: 'notes',
+           layer: svgNotes(projection, context, dispatch)
+         }, {
+           id: 'data',
+           layer: svgData(projection, context, dispatch)
+         }, {
+           id: 'keepRight',
+           layer: svgKeepRight(projection, context, dispatch)
+         }, {
+           id: 'improveOSM',
+           layer: svgImproveOSM(projection, context, dispatch)
+         }, {
+           id: 'osmose',
+           layer: svgOsmose(projection, context, dispatch)
+         }, {
+           id: 'streetside',
+           layer: svgStreetside(projection, context, dispatch)
+         }, {
+           id: 'mapillary',
+           layer: svgMapillaryImages(projection, context, dispatch)
+         }, {
+           id: 'mapillary-position',
+           layer: svgMapillaryPosition(projection, context)
+         }, {
+           id: 'mapillary-map-features',
+           layer: svgMapillaryMapFeatures(projection, context, dispatch)
+         }, {
+           id: 'mapillary-signs',
+           layer: svgMapillarySigns(projection, context, dispatch)
+         }, {
+           id: 'openstreetcam',
+           layer: svgOpenstreetcamImages(projection, context, dispatch)
+         }, {
+           id: 'debug',
+           layer: svgDebug(projection, context)
+         }, {
+           id: 'geolocate',
+           layer: svgGeolocate(projection)
+         }, {
+           id: 'touch',
+           layer: svgTouch()
+         }];
+
+         function drawLayers(selection) {
+           svg = selection.selectAll('.surface').data([0]);
+           svg = svg.enter().append('svg').attr('class', 'surface').merge(svg);
+           var defs = svg.selectAll('.surface-defs').data([0]);
+           defs.enter().append('defs').attr('class', 'surface-defs');
+           var groups = svg.selectAll('.data-layer').data(_layers);
+           groups.exit().remove();
+           groups.enter().append('g').attr('class', function (d) {
+             return 'data-layer ' + d.id;
+           }).merge(groups).each(function (d) {
+             select(this).call(d.layer);
+           });
+         }

 
 

-                   t.x = p0[0] - p1[0] * t.k;
-                   t.y = p0[1] - p1[1] * t.k;
+         drawLayers.all = function () {
+           return _layers;
+         };

 
 

-                   map.transformEase(t);
-               });
+         drawLayers.layer = function (id) {
+           var obj = _layers.find(function (o) {
+             return o.id === id;
+           });

 
 

-               context.on('enter.map',  function() {
-                   if (!map.editableDataEnabled(true /* skip zoom check */)) { return; }
-
-                   // redraw immediately any objects affected by a change in selectedIDs.
-                   var graph = context.graph();
-                   var selectedAndParents = {};
-                   context.selectedIDs().forEach(function(id) {
-                       var entity = graph.hasEntity(id);
-                       if (entity) {
-                           selectedAndParents[entity.id] = entity;
-                           if (entity.type === 'node') {
-                               graph.parentWays(entity).forEach(function(parent) {
-                                   selectedAndParents[parent.id] = parent;
-                               });
-                           }
-                       }
-                   });
-                   var data = Object.values(selectedAndParents);
-                   var filter = function(d) { return d.id in selectedAndParents; };
+           return obj && obj.layer;
+         };

 
 

-                   data = context.features().filter(data, graph);
+         drawLayers.only = function (what) {
+           var arr = [].concat(what);

 
 

-                   surface
-                       .call(drawVertices.drawSelected, graph, map.extent())
-                       .call(drawLines, graph, data, filter)
-                       .call(drawAreas, graph, data, filter)
-                       .call(drawMidpoints, graph, data, filter, map.trimmedExtent());
+           var all = _layers.map(function (layer) {
+             return layer.id;
+           });

 
 

-                   dispatch$1.call('drawn', this, { full: false });
+           return drawLayers.remove(utilArrayDifference(all, arr));
+         };

 
 

-                   // redraw everything else later
-                   scheduleRedraw();
-               });
+         drawLayers.remove = function (what) {
+           var arr = [].concat(what);
+           arr.forEach(function (id) {
+             _layers = _layers.filter(function (o) {
+               return o.id !== id;
+             });
+           });
+           dispatch.call('change');
+           return this;
+         };

 
 

-               map.dimensions(utilGetDimensions(selection));
-           }
+         drawLayers.add = function (what) {
+           var arr = [].concat(what);
+           arr.forEach(function (obj) {
+             if ('id' in obj && 'layer' in obj) {
+               _layers.push(obj);
+             }
+           });
+           dispatch.call('change');
+           return this;
+         };

 
 

+         drawLayers.dimensions = function (val) {
+           if (!arguments.length) return utilGetDimensions(svg);
+           utilSetDimensions(svg, val);
+           return this;
+         };

 
 

-           function zoomEventFilter() {
-               // Fix for #2151, (see also d3/d3-zoom#60, d3/d3-brush#18)
-               // Intercept `mousedown` and check if there is an orphaned zoom gesture.
-               // This can happen if a previous `mousedown` occurred without a `mouseup`.
-               // If we detect this, dispatch `mouseup` to complete the orphaned gesture,
-               // so that d3-zoom won't stop propagation of new `mousedown` events.
-               if (event.type === 'mousedown') {
-                   var hasOrphan = false;
-                   var listeners = window.__on;
-                   for (var i = 0; i < listeners.length; i++) {
-                       var listener = listeners[i];
-                       if (listener.name === 'zoom' && listener.type === 'mouseup') {
-                           hasOrphan = true;
-                           break;
-                       }
-                   }
-                   if (hasOrphan) {
-                       var event$1 = window.CustomEvent;
-                       if (event$1) {
-                           event$1 = new event$1('mouseup');
-                       } else {
-                           event$1 = window.document.createEvent('Event');
-                           event$1.initEvent('mouseup', false, false);
-                       }
-                       // Event needs to be dispatched with an event.view property.
-                       event$1.view = window;
-                       window.dispatchEvent(event$1);
-                   }
-               }
+         return utilRebind(drawLayers, dispatch, 'on');
+       }

 
 

-               return event.button !== 2;   // ignore right clicks
-           }
+       function svgLines(projection, context) {
+         var detected = utilDetect();
+         var highway_stack = {
+           motorway: 0,
+           motorway_link: 1,
+           trunk: 2,
+           trunk_link: 3,
+           primary: 4,
+           primary_link: 5,
+           secondary: 6,
+           tertiary: 7,
+           unclassified: 8,
+           residential: 9,
+           service: 10,
+           footway: 11
+         };
+
+         function drawTargets(selection, graph, entities, filter) {
+           var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+           var getPath = svgPath(projection).geojson;
+           var activeID = context.activeID();
+           var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways
+
+           var data = {
+             targets: [],
+             nopes: []
+           };
+           entities.forEach(function (way) {
+             var features = svgSegmentWay(way, graph, activeID);
+             data.targets.push.apply(data.targets, features.passive);
+             data.nopes.push.apply(data.nopes, features.active);
+           }); // Targets allow hover and vertex snapping
+
+           var targetData = data.targets.filter(getPath);
+           var targets = selection.selectAll('.line.target-allowed').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(targetData, function key(d) {
+             return d.id;
+           }); // exit
+
+           targets.exit().remove();
+
+           var segmentWasEdited = function segmentWasEdited(d) {
+             var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
+
+             if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+               return false;
+             }

 
 

+             return d.properties.nodes.some(function (n) {
+               return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
+             });
+           }; // enter/update

 
 

-           function pxCenter() {
-               return [_dimensions[0] / 2, _dimensions[1] / 2];
-           }

 
 

+           targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
+             return 'way line target target-allowed ' + targetClass + d.id;
+           }).classed('segment-edited', segmentWasEdited); // NOPE

 
 

-           function drawEditable(difference, extent) {
-               var mode = context.mode();
-               var graph = context.graph();
-               var features = context.features();
-               var all = context.history().intersects(map.extent());
-               var fullRedraw = false;
-               var data;
-               var set;
-               var filter;
-               var applyFeatureLayerFilters = true;
-
-               if (map.isInWideSelection()) {
-                   data = [];
-                   utilEntityAndDeepMemberIDs(mode.selectedIDs(), context.graph()).forEach(function(id) {
-                       var entity = context.hasEntity(id);
-                       if (entity) { data.push(entity); }
-                   });
-                   fullRedraw = true;
-                   filter = utilFunctor(true);
-                   // selected features should always be visible, so we can skip filtering
-                   applyFeatureLayerFilters = false;
-
-               } else if (difference) {
-                   var complete = difference.complete(map.extent());
-                   data = Object.values(complete).filter(Boolean);
-                   set = new Set(Object.keys(complete));
-                   filter = function(d) { return set.has(d.id); };
-                   features.clear(data);
+           var nopeData = data.nopes.filter(getPath);
+           var nopes = selection.selectAll('.line.target-nope').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(nopeData, function key(d) {
+             return d.id;
+           }); // exit

 
 

-               } else {
-                   // force a full redraw if gatherStats detects that a feature
-                   // should be auto-hidden (e.g. points or buildings)..
-                   if (features.gatherStats(all, graph, _dimensions)) {
-                       extent = undefined;
-                   }
+           nopes.exit().remove(); // enter/update

 
 

-                   if (extent) {
-                       data = context.history().intersects(map.extent().intersection(extent));
-                       set = new Set(data.map(function(entity) { return entity.id; }));
-                       filter = function(d) { return set.has(d.id); };
+           nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
+             return 'way line target target-nope ' + nopeClass + d.id;
+           }).classed('segment-edited', segmentWasEdited);
+         }

 
 

-                   } else {
-                       data = all;
-                       fullRedraw = true;
-                       filter = utilFunctor(true);
-                   }
-               }
+         function drawLines(selection, graph, entities, filter) {
+           var base = context.history().base();

 
 

-               if (applyFeatureLayerFilters) {
-                   data = features.filter(data, graph);
-               } else {
-                   context.features().resetStats();
-               }
+           function waystack(a, b) {
+             var selected = context.selectedIDs();
+             var scoreA = selected.indexOf(a.id) !== -1 ? 20 : 0;
+             var scoreB = selected.indexOf(b.id) !== -1 ? 20 : 0;

 
 

-               if (mode && mode.id === 'select') {
-                   // update selected vertices - the user might have just double-clicked a way,
-                   // creating a new vertex, triggering a partial redraw without a mode change
-                   surface.call(drawVertices.drawSelected, graph, map.extent());
-               }
+             if (a.tags.highway) {
+               scoreA -= highway_stack[a.tags.highway];
+             }

 
 

-               surface
-                   .call(drawVertices, graph, data, filter, map.extent(), fullRedraw)
-                   .call(drawLines, graph, data, filter)
-                   .call(drawAreas, graph, data, filter)
-                   .call(drawMidpoints, graph, data, filter, map.trimmedExtent())
-                   .call(drawLabels, graph, data, filter, _dimensions, fullRedraw)
-                   .call(drawPoints, graph, data, filter);
+             if (b.tags.highway) {
+               scoreB -= highway_stack[b.tags.highway];
+             }

 
 

-               dispatch$1.call('drawn', this, {full: true});
+             return scoreA - scoreB;

            }
 
            }
 

-           map.init = function() {
-               drawLayers = svgLayers(projection, context);
-               drawPoints = svgPoints(projection, context);
-               drawVertices = svgVertices(projection, context);
-               drawLines = svgLines(projection, context);
-               drawAreas = svgAreas(projection, context);
-               drawMidpoints = svgMidpoints(projection, context);
-               drawLabels = svgLabels(projection, context);
-           };
+           function drawLineGroup(selection, klass, isSelected) {
+             // Note: Don't add `.selected` class in draw modes
+             var mode = context.mode();
+             var isDrawing = mode && /^draw/.test(mode.id);
+             var selectedClass = !isDrawing && isSelected ? 'selected ' : '';
+             var lines = selection.selectAll('path').filter(filter).data(getPathData(isSelected), osmEntity.key);
+             lines.exit().remove(); // Optimization: Call expensive TagClasses only on enter selection. This
+             // works because osmEntity.key is defined to include the entity v attribute.

 
 

-           function editOff() {
-               context.features().resetStats();
-               surface.selectAll('.layer-osm *').remove();
-               surface.selectAll('.layer-touch:not(.markers) *').remove();
-
-               var allowed = {
-                   'browse': true,
-                   'save': true,
-                   'select-note': true,
-                   'select-data': true,
-                   'select-error': true
-               };
+             lines.enter().append('path').attr('class', function (d) {
+               var prefix = 'way line'; // if this line isn't styled by its own tags

 
 

-               var mode = context.mode();
-               if (mode && !allowed[mode.id]) {
-                   context.enter(modeBrowse(context));
+               if (!d.hasInterestingTags()) {
+                 var parentRelations = graph.parentRelations(d);
+                 var parentMultipolygons = parentRelations.filter(function (relation) {
+                   return relation.isMultipolygon();
+                 }); // and if it's a member of at least one multipolygon relation
+
+                 if (parentMultipolygons.length > 0 && // and only multipolygon relations
+                 parentRelations.length === parentMultipolygons.length) {
+                   // then fudge the classes to style this as an area edge
+                   prefix = 'relation area';
+                 }

                }
 
                }
 

-               dispatch$1.call('drawn', this, {full: true});
+               var oldMPClass = oldMultiPolygonOuters[d.id] ? 'old-multipolygon ' : '';
+               return prefix + ' ' + klass + ' ' + selectedClass + oldMPClass + d.id;
+             }).classed('added', function (d) {
+               return !base.entities[d.id];
+             }).classed('geometry-edited', function (d) {
+               return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
+             }).classed('retagged', function (d) {
+               return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+             }).call(svgTagClasses()).merge(lines).sort(waystack).attr('d', getPath).call(svgTagClasses().tags(svgRelationMemberTags(graph)));
+             return selection;

            }
 
            }
 

+           function getPathData(isSelected) {
+             return function () {
+               var layer = this.parentNode.__data__;
+               var data = pathdata[layer] || [];
+               return data.filter(function (d) {
+                 if (isSelected) {
+                   return context.selectedIDs().indexOf(d.id) !== -1;
+                 } else {
+                   return context.selectedIDs().indexOf(d.id) === -1;
+                 }
+               });
+             };
+           }

 
 

+           function addMarkers(layergroup, pathclass, groupclass, groupdata, marker) {
+             var markergroup = layergroup.selectAll('g.' + groupclass).data([pathclass]);
+             markergroup = markergroup.enter().append('g').attr('class', groupclass).merge(markergroup);
+             var markers = markergroup.selectAll('path').filter(filter).data(function data() {
+               return groupdata[this.parentNode.__data__] || [];
+             }, function key(d) {
+               return [d.id, d.index];
+             });
+             markers.exit().remove();
+             markers = markers.enter().append('path').attr('class', pathclass).merge(markers).attr('marker-mid', marker).attr('d', function (d) {
+               return d.d;
+             });

 
 

+             if (detected.ie) {
+               markers.each(function () {
+                 this.parentNode.insertBefore(this, this);
+               });
+             }
+           }

 
 

+           var getPath = svgPath(projection, graph);
+           var ways = [];
+           var onewaydata = {};
+           var sideddata = {};
+           var oldMultiPolygonOuters = {};
+
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             var outer = osmOldMultipolygonOuterMember(entity, graph);
+
+             if (outer) {
+               ways.push(entity.mergeTags(outer.tags));
+               oldMultiPolygonOuters[outer.id] = true;
+             } else if (entity.geometry(graph) === 'line') {
+               ways.push(entity);
+             }
+           }

 
 

-           function gestureChange() {
-               // Remap Safari gesture events to wheel events - #5492
-               // We want these disabled most places, but enabled for zoom/unzoom on map surface
-               // https://developer.mozilla.org/en-US/docs/Web/API/GestureEvent
-               var e = event;
-               e.preventDefault();
-
-               var props = {
-                   deltaMode: 0,    // dummy values to ignore in zoomPan
-                   deltaY: 1,       // dummy values to ignore in zoomPan
-                   clientX: e.clientX,
-                   clientY: e.clientY,
-                   screenX: e.screenX,
-                   screenY: e.screenY,
-                   x: e.x,
-                   y: e.y
-               };
+           ways = ways.filter(getPath);
+           var pathdata = utilArrayGroupBy(ways, function (way) {
+             return way.layer();
+           });
+           Object.keys(pathdata).forEach(function (k) {
+             var v = pathdata[k];
+             var onewayArr = v.filter(function (d) {
+               return d.isOneWay();
+             });
+             var onewaySegments = svgMarkerSegments(projection, graph, 35, function shouldReverse(entity) {
+               return entity.tags.oneway === '-1';
+             }, function bothDirections(entity) {
+               return entity.tags.oneway === 'reversible' || entity.tags.oneway === 'alternating';
+             });
+             onewaydata[k] = utilArrayFlatten(onewayArr.map(onewaySegments));
+             var sidedArr = v.filter(function (d) {
+               return d.isSided();
+             });
+             var sidedSegments = svgMarkerSegments(projection, graph, 30, function shouldReverse() {
+               return false;
+             }, function bothDirections() {
+               return false;
+             });
+             sideddata[k] = utilArrayFlatten(sidedArr.map(sidedSegments));
+           });
+           var covered = selection.selectAll('.layer-osm.covered'); // under areas

 
 

-               var e2 = new WheelEvent('wheel', props);
-               e2._scale = e.scale;         // preserve the original scale
-               e2._rotation = e.rotation;   // preserve the original rotation
-
-               _selection.node().dispatchEvent(e2);
-           }
-
-
-           function zoomPan(manualEvent) {
-               var event$1 = (manualEvent || event);
-               var source = event$1.sourceEvent;
-               var eventTransform = event$1.transform;
-               var x = eventTransform.x;
-               var y = eventTransform.y;
-               var k = eventTransform.k;
-
-               // Special handling of 'wheel' events:
-               // They might be triggered by the user scrolling the mouse wheel,
-               // or 2-finger pinch/zoom gestures, the transform may need adjustment.
-               if (source && source.type === 'wheel') {
-
-                   // assume that the gesture is already handled by pointer events
-                   if (_pointerDown) { return; }
-
-                   var detected = utilDetect();
-                   var dX = source.deltaX;
-                   var dY = source.deltaY;
-                   var x2 = x;
-                   var y2 = y;
-                   var k2 = k;
-                   var t0, p0, p1;
-
-                   // Normalize mousewheel scroll speed (Firefox) - #3029
-                   // If wheel delta is provided in LINE units, recalculate it in PIXEL units
-                   // We are essentially redoing the calculations that occur here:
-                   //   https://github.com/d3/d3-zoom/blob/78563a8348aa4133b07cac92e2595c2227ca7cd7/src/zoom.js#L203
-                   // See this for more info:
-                   //   https://github.com/basilfx/normalize-wheel/blob/master/src/normalizeWheel.js
-                   if (source.deltaMode === 1 /* LINE */) {
-                       // Convert from lines to pixels, more if the user is scrolling fast.
-                       // (I made up the exp function to roughly match Firefox to what Chrome does)
-                       // These numbers should be floats, because integers are treated as pan gesture below.
-                       var lines = Math.abs(source.deltaY);
-                       var sign = (source.deltaY > 0) ? 1 : -1;
-                       dY = sign * clamp(
-                           Math.exp((lines - 1) * 0.75) * 4.000244140625,
-                           4.000244140625,    // min
-                           350.000244140625   // max
-                       );
+           var uncovered = selection.selectAll('.layer-osm.lines'); // over areas

 
 

-                       // On Firefox Windows and Linux we always get +/- the scroll line amount (default 3)
-                       // There doesn't seem to be any scroll accelleration.
-                       // This multiplier increases the speed a little bit - #5512
-                       if (detected.os !== 'mac') {
-                           dY *= 5;
-                       }
+           var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..

 
 

-                       // recalculate x2,y2,k2
-                       t0 = _isTransformed ? _transformLast : _transformStart;
-                       p0 = _getMouseCoords(source);
-                       p1 = t0.invert(p0);
-                       k2 = t0.k * Math.pow(2, -dY / 500);
-                       k2 = clamp(k2, kMin, kMax);
-                       x2 = p0[0] - p1[0] * k2;
-                       y2 = p0[1] - p1[1] * k2;
-
-                   // 2 finger map pinch zooming (Safari) - #5492
-                   // These are fake `wheel` events we made from Safari `gesturechange` events..
-                   } else if (source._scale) {
-                       // recalculate x2,y2,k2
-                       t0 = _gestureTransformStart;
-                       p0 = _getMouseCoords(source);
-                       p1 = t0.invert(p0);
-                       k2 = t0.k * source._scale;
-                       k2 = clamp(k2, kMin, kMax);
-                       x2 = p0[0] - p1[0] * k2;
-                       y2 = p0[1] - p1[1] * k2;
-
-                   // 2 finger map pinch zooming (all browsers except Safari) - #5492
-                   // Pinch zooming via the `wheel` event will always have:
-                   // - `ctrlKey = true`
-                   // - `deltaY` is not round integer pixels (ignore `deltaX`)
-                   } else if (source.ctrlKey && !isInteger(dY)) {
-                       dY *= 6;   // slightly scale up whatever the browser gave us
-
-                       // recalculate x2,y2,k2
-                       t0 = _isTransformed ? _transformLast : _transformStart;
-                       p0 = _getMouseCoords(source);
-                       p1 = t0.invert(p0);
-                       k2 = t0.k * Math.pow(2, -dY / 500);
-                       k2 = clamp(k2, kMin, kMax);
-                       x2 = p0[0] - p1[0] * k2;
-                       y2 = p0[1] - p1[1] * k2;
-
-                   // Trackpad scroll zooming with shift or alt/option key down
-                   } else if ((source.altKey || source.shiftKey) && isInteger(dY)) {
-                       // recalculate x2,y2,k2
-                       t0 = _isTransformed ? _transformLast : _transformStart;
-                       p0 = _getMouseCoords(source);
-                       p1 = t0.invert(p0);
-                       k2 = t0.k * Math.pow(2, -dY / 500);
-                       k2 = clamp(k2, kMin, kMax);
-                       x2 = p0[0] - p1[0] * k2;
-                       y2 = p0[1] - p1[1] * k2;
-
-                   // 2 finger map panning (Mac only, all browsers) - #5492, #5512
-                   // Panning via the `wheel` event will always have:
-                   // - `ctrlKey = false`
-                   // - `deltaX`,`deltaY` are round integer pixels
-                   } else if (detected.os === 'mac' && !source.ctrlKey && isInteger(dX) && isInteger(dY)) {
-                       p1 = projection.translate();
-                       x2 = p1[0] - dX;
-                       y2 = p1[1] - dY;
-                       k2 = projection.scale();
-                       k2 = clamp(k2, kMin, kMax);
-                   }
+           [covered, uncovered].forEach(function (selection) {
+             var range = selection === covered ? range$1(-10, 0) : range$1(0, 11);
+             var layergroup = selection.selectAll('g.layergroup').data(range);
+             layergroup = layergroup.enter().append('g').attr('class', function (d) {
+               return 'layergroup layer' + String(d);
+             }).merge(layergroup);
+             layergroup.selectAll('g.linegroup').data(['shadow', 'casing', 'stroke', 'shadow-highlighted', 'casing-highlighted', 'stroke-highlighted']).enter().append('g').attr('class', function (d) {
+               return 'linegroup line-' + d;
+             });
+             layergroup.selectAll('g.line-shadow').call(drawLineGroup, 'shadow', false);
+             layergroup.selectAll('g.line-casing').call(drawLineGroup, 'casing', false);
+             layergroup.selectAll('g.line-stroke').call(drawLineGroup, 'stroke', false);
+             layergroup.selectAll('g.line-shadow-highlighted').call(drawLineGroup, 'shadow', true);
+             layergroup.selectAll('g.line-casing-highlighted').call(drawLineGroup, 'casing', true);
+             layergroup.selectAll('g.line-stroke-highlighted').call(drawLineGroup, 'stroke', true);
+             addMarkers(layergroup, 'oneway', 'onewaygroup', onewaydata, 'url(#ideditor-oneway-marker)');
+             addMarkers(layergroup, 'sided', 'sidedgroup', sideddata, function marker(d) {
+               var category = graph.entity(d.id).sidednessIdentifier();
+               return 'url(#ideditor-sided-marker-' + category + ')';
+             });
+           }); // Draw touch targets..

 
 

-                   // something changed - replace the event transform
-                   if (x2 !== x || y2 !== y || k2 !== k) {
-                       x = x2;
-                       y = y2;
-                       k = k2;
-                       eventTransform = identity$2.translate(x2, y2).scale(k2);
-                       if (_zoomerPanner._transform) {
-                           // utilZoomPan interface
-                           _zoomerPanner._transform(eventTransform);
-                       } else {
-                           // d3_zoom interface
-                           _selection.node().__zoom = eventTransform;
-                       }
-                   }
+           touchLayer.call(drawTargets, graph, ways, filter);
+         }

 
 

-               }
+         return drawLines;
+       }

 
 

-               if (_transformStart.x === x &&
-                   _transformStart.y === y &&
-                   _transformStart.k === k) {
-                   return;  // no change
-               }
+       function svgMidpoints(projection, context) {
+         var targetRadius = 8;

 
 

-               var withinEditableZoom = map.withinEditableZoom();
-               if (_lastWithinEditableZoom !== withinEditableZoom) {
-                   if (_lastWithinEditableZoom !== undefined) {
-                       // notify that the map zoomed in or out over the editable zoom threshold
-                       dispatch$1.call('crossEditableZoom', this, withinEditableZoom);
-                   }
-                   _lastWithinEditableZoom = withinEditableZoom;
+         function drawTargets(selection, graph, entities, filter) {
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var getTransform = svgPointTransform(projection).geojson;
+           var data = entities.map(function (midpoint) {
+             return {
+               type: 'Feature',
+               id: midpoint.id,
+               properties: {
+                 target: true,
+                 entity: midpoint
+               },
+               geometry: {
+                 type: 'Point',
+                 coordinates: midpoint.loc

                }
                }

+             };
+           });
+           var targets = selection.selectAll('.midpoint.target').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(data, function key(d) {
+             return d.id;
+           }); // exit

 
 

-               if (geoScaleToZoom(k, TILESIZE) < _minzoom) {
-                   surface.interrupt();
-                   dispatch$1.call('hitMinZoom', this, map);
-                   setCenterZoom(map.center(), context.minEditableZoom(), 0, true);
-                   scheduleRedraw();
-                   dispatch$1.call('move', this, map);
-                   return;
-               }
+           targets.exit().remove(); // enter/update

 
 

-               projection.transform(eventTransform);
+           targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
+             return 'node midpoint target ' + fillClass + d.id;
+           }).attr('transform', getTransform);
+         }

 
 

-               var scale = k / _transformStart.k;
-               var tX = (x / scale - _transformStart.x) * scale;
-               var tY = (y / scale - _transformStart.y) * scale;
+         function drawMidpoints(selection, graph, entities, filter, extent) {
+           var drawLayer = selection.selectAll('.layer-osm.points .points-group.midpoints');
+           var touchLayer = selection.selectAll('.layer-touch.points');
+           var mode = context.mode();

 
 

-               if (context.inIntro()) {
-                   curtainProjection.transform({
-                       x: x - tX,
-                       y: y - tY,
-                       k: k
-                   });
-               }
+           if (mode && mode.id !== 'select' || !context.map().withinEditableZoom()) {
+             drawLayer.selectAll('.midpoint').remove();
+             touchLayer.selectAll('.midpoint.target').remove();
+             return;
+           }

 
 

-               if (source) {
-                   _lastPointerEvent = event$1;
-               }
-               _isTransformed = true;
-               _transformLast = eventTransform;
-               utilSetTransform(supersurface, tX, tY, scale);
-               scheduleRedraw();
+           var poly = extent.polygon();
+           var midpoints = {};

 
 

-               dispatch$1.call('move', this, map);
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             if (entity.type !== 'way') continue;
+             if (!filter(entity)) continue;
+             if (context.selectedIDs().indexOf(entity.id) < 0) continue;
+             var nodes = graph.childNodes(entity);

 
 

+             for (var j = 0; j < nodes.length - 1; j++) {
+               var a = nodes[j];
+               var b = nodes[j + 1];
+               var id = [a.id, b.id].sort().join('-');

 
 

-               function isInteger(val) {
-                   return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
-               }
-           }
+               if (midpoints[id]) {
+                 midpoints[id].parents.push(entity);
+               } else if (geoVecLength(projection(a.loc), projection(b.loc)) > 40) {
+                 var point = geoVecInterp(a.loc, b.loc, 0.5);
+                 var loc = null;

 
 

+                 if (extent.intersects(point)) {
+                   loc = point;
+                 } else {
+                   for (var k = 0; k < 4; k++) {
+                     point = geoLineIntersection([a.loc, b.loc], [poly[k], poly[k + 1]]);

 
 

-           function resetTransform() {
-               if (!_isTransformed) { return false; }
+                     if (point && geoVecLength(projection(a.loc), projection(point)) > 20 && geoVecLength(projection(b.loc), projection(point)) > 20) {
+                       loc = point;
+                       break;
+                     }
+                   }
+                 }

 
 

-               utilSetTransform(supersurface, 0, 0);
-               _isTransformed = false;
-               if (context.inIntro()) {
-                   curtainProjection.transform(projection.transform());
+                 if (loc) {
+                   midpoints[id] = {
+                     type: 'midpoint',
+                     id: id,
+                     loc: loc,
+                     edge: [a.id, b.id],
+                     parents: [entity]
+                   };
+                 }

                }
                }

-               return true;
+             }

            }
 
            }
 

+           function midpointFilter(d) {
+             if (midpoints[d.id]) return true;

 
 

-           function redraw(difference, extent) {
-               if (surface.empty() || !_redrawEnabled) { return; }
-
-               // If we are in the middle of a zoom/pan, we can't do differenced redraws.
-               // It would result in artifacts where differenced entities are redrawn with
-               // one transform and unchanged entities with another.
-               if (resetTransform()) {
-                   difference = extent = undefined;
+             for (var i = 0; i < d.parents.length; i++) {
+               if (filter(d.parents[i])) {
+                 return true;

                }
                }

+             }

 
 

-               var zoom = map.zoom();
-               var z = String(~~zoom);
+             return false;
+           }

 
 

-               if (surface.attr('data-zoom') !== z) {
-                   surface.attr('data-zoom', z);
-               }
+           var groups = drawLayer.selectAll('.midpoint').filter(midpointFilter).data(Object.values(midpoints), function (d) {
+             return d.id;
+           });
+           groups.exit().remove();
+           var enter = groups.enter().insert('g', ':first-child').attr('class', 'midpoint');
+           enter.append('polygon').attr('points', '-6,8 10,0 -6,-8').attr('class', 'shadow');
+           enter.append('polygon').attr('points', '-3,4 5,0 -3,-4').attr('class', 'fill');
+           groups = groups.merge(enter).attr('transform', function (d) {
+             var translate = svgPointTransform(projection);
+             var a = graph.entity(d.edge[0]);
+             var b = graph.entity(d.edge[1]);
+             var angle = geoAngle(a, b, projection) * (180 / Math.PI);
+             return translate(d) + ' rotate(' + angle + ')';
+           }).call(svgTagClasses().tags(function (d) {
+             return d.parents[0].tags;
+           })); // Propagate data bindings.

 
 

-               // class surface as `lowzoom` around z17-z18.5 (based on latitude)
-               var lat = map.center()[1];
-               var lowzoom = linear$2()
-                   .domain([-60, 0, 60])
-                   .range([17, 18.5, 17])
-                   .clamp(true);
+           groups.select('polygon.shadow');
+           groups.select('polygon.fill'); // Draw touch targets..

 
 

-               surface
-                   .classed('low-zoom', zoom <= lowzoom(lat));
+           touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+         }

 
 

+         return drawMidpoints;
+       }

 
 

-               if (!difference) {
-                   supersurface.call(context.background());
-                   wrapper.call(drawLayers);
-               }
+       function svgPoints(projection, context) {
+         function markerPath(selection, klass) {
+           selection.attr('class', klass).attr('transform', 'translate(-8, -23)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+         }

 
 

-               // OSM
-               if (map.editableDataEnabled() || map.isInWideSelection()) {
-                   context.loadTiles(projection);
-                   drawEditable(difference, extent);
-               } else {
-                   editOff();
-               }
+         function sortY(a, b) {
+           return b.loc[1] - a.loc[1];
+         } // Avoid exit/enter if we're just moving stuff around.
+         // The node will get a new version but we only need to run the update selection.

 
 

-               _transformStart = projection.transform();

 
 

-               return map;
-           }
+         function fastEntityKey(d) {
+           var mode = context.mode();
+           var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+           return isMoving ? d.id : osmEntity.key(d);
+         }

 
 

+         function drawTargets(selection, graph, entities, filter) {
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var getTransform = svgPointTransform(projection).geojson;
+           var activeID = context.activeID();
+           var data = [];
+           entities.forEach(function (node) {
+             if (activeID === node.id) return; // draw no target on the activeID

 
 

+             data.push({
+               type: 'Feature',
+               id: node.id,
+               properties: {
+                 target: true,
+                 entity: node
+               },
+               geometry: node.asGeoJSON()
+             });
+           });
+           var targets = selection.selectAll('.point.target').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(data, function key(d) {
+             return d.id;
+           }); // exit
+
+           targets.exit().remove(); // enter/update
+
+           targets.enter().append('rect').attr('x', -10).attr('y', -26).attr('width', 20).attr('height', 30).merge(targets).attr('class', function (d) {
+             return 'node point target ' + fillClass + d.id;
+           }).attr('transform', getTransform);
+         }
+
+         function drawPoints(selection, graph, entities, filter) {
+           var wireframe = context.surface().classed('fill-wireframe');
+           var zoom = geoScaleToZoom(projection.scale());
+           var base = context.history().base(); // Points with a direction will render as vertices at higher zooms..
+
+           function renderAsPoint(entity) {
+             return entity.geometry(graph) === 'point' && !(zoom >= 18 && entity.directions(graph, projection).length);
+           } // All points will render as vertices in wireframe mode too..
+
+
+           var points = wireframe ? [] : entities.filter(renderAsPoint);
+           points.sort(sortY);
+           var drawLayer = selection.selectAll('.layer-osm.points .points-group.points');
+           var touchLayer = selection.selectAll('.layer-touch.points'); // Draw points..
+
+           var groups = drawLayer.selectAll('g.point').filter(filter).data(points, fastEntityKey);
+           groups.exit().remove();
+           var enter = groups.enter().append('g').attr('class', function (d) {
+             return 'node point ' + d.id;
+           }).order();
+           enter.append('path').call(markerPath, 'shadow');
+           enter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+           enter.append('path').call(markerPath, 'stroke');
+           enter.append('use').attr('transform', 'translate(-5, -19)').attr('class', 'icon').attr('width', '11px').attr('height', '11px');
+           groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('added', function (d) {
+             return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
+           }).classed('moved', function (d) {
+             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
+           }).classed('retagged', function (d) {
+             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+           }).call(svgTagClasses());
+           groups.select('.shadow'); // propagate bound data
+
+           groups.select('.stroke'); // propagate bound data
+
+           groups.select('.icon') // propagate bound data
+           .attr('xlink:href', function (entity) {
+             var preset = _mainPresetIndex.match(entity, graph);
+             var picon = preset && preset.icon;
+
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return '#' + picon + (isMaki ? '-11' : '');
+             }
+           }); // Draw touch targets..

 
 

-           var immediateRedraw = function(difference, extent) {
-               if (!difference && !extent) { cancelPendingRedraw(); }
-               redraw(difference, extent);
-           };
+           touchLayer.call(drawTargets, graph, points, filter);
+         }

 
 

+         return drawPoints;
+       }

 
 

-           map.lastPointerEvent = function() {
-               return _lastPointerEvent;
-           };
+       function svgTurns(projection, context) {
+         function icon(turn) {
+           var u = turn.u ? '-u' : '';
+           if (turn.no) return '#iD-turn-no' + u;
+           if (turn.only) return '#iD-turn-only' + u;
+           return '#iD-turn-yes' + u;
+         }

 
 

+         function drawTurns(selection, graph, turns) {
+           function turnTransform(d) {
+             var pxRadius = 50;
+             var toWay = graph.entity(d.to.way);
+             var toPoints = graph.childNodes(toWay).map(function (n) {
+               return n.loc;
+             }).map(projection);
+             var toLength = geoPathLength(toPoints);
+             var mid = toLength / 2; // midpoint of destination way

 
 

-           map.mouse = function() {
-               var event$1 = _lastPointerEvent || event;
-               if (event$1) {
-                   var s;
-                   while ((s = event$1.sourceEvent)) { event$1 = s; }
-                   return _getMouseCoords(event$1);
-               }
-               return null;
-           };
+             var toNode = graph.entity(d.to.node);
+             var toVertex = graph.entity(d.to.vertex);
+             var a = geoAngle(toVertex, toNode, projection);
+             var o = projection(toVertex.loc);
+             var r = d.u ? 0 // u-turn: no radius
+             : !toWay.__via ? pxRadius // leaf way: put marker at pxRadius
+             : Math.min(mid, pxRadius); // via way: prefer pxRadius, fallback to mid for very short ways

 
 

+             return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' + 'rotate(' + a * 180 / Math.PI + ')';
+           }

 
 

-           // returns Lng/Lat
-           map.mouseCoordinates = function() {
-               var coord = map.mouse() || pxCenter();
-               return projection.invert(coord);
-           };
+           var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
+           var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..

 
 

+           var groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
+             return d.key;
+           }); // exit

 
 

-           map.dblclickZoomEnable = function(val) {
-               if (!arguments.length) { return _dblClickZoomEnabled; }
-               _dblClickZoomEnabled = val;
-               return map;
-           };
+           groups.exit().remove(); // enter

 
 

+           var groupsEnter = groups.enter().append('g').attr('class', function (d) {
+             return 'turn ' + d.key;
+           });
+           var turnsEnter = groupsEnter.filter(function (d) {
+             return !d.u;
+           });
+           turnsEnter.append('rect').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+           turnsEnter.append('use').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+           var uEnter = groupsEnter.filter(function (d) {
+             return d.u;
+           });
+           uEnter.append('circle').attr('r', '16');
+           uEnter.append('use').attr('transform', 'translate(-16, -16)').attr('width', '32').attr('height', '32'); // update

 
 

-           map.redrawEnable = function(val) {
-               if (!arguments.length) { return _redrawEnabled; }
-               _redrawEnabled = val;
-               return map;
-           };
+           groups = groups.merge(groupsEnter).attr('opacity', function (d) {
+             return d.direct === false ? '0.7' : null;
+           }).attr('transform', turnTransform);
+           groups.select('use').attr('xlink:href', icon);
+           groups.select('rect'); // propagate bound data

 
 

+           groups.select('circle'); // propagate bound data
+           // Draw touch targets..

 
 

-           map.isTransformed = function() {
-               return _isTransformed;
-           };
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
+             return d.key;
+           }); // exit

 
 

+           groups.exit().remove(); // enter

 
 

-           function setTransform(t2, duration, force) {
-               var t = projection.transform();
-               if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) { return false; }
+           groupsEnter = groups.enter().append('g').attr('class', function (d) {
+             return 'turn ' + d.key;
+           });
+           turnsEnter = groupsEnter.filter(function (d) {
+             return !d.u;
+           });
+           turnsEnter.append('rect').attr('class', 'target ' + fillClass).attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+           uEnter = groupsEnter.filter(function (d) {
+             return d.u;
+           });
+           uEnter.append('circle').attr('class', 'target ' + fillClass).attr('r', '16'); // update

 
 

-               if (duration) {
-                   _selection
-                       .transition()
-                       .duration(duration)
-                       .on('start', function() { map.startEase(); })
-                       .call(_zoomerPanner.transform, identity$2.translate(t2.x, t2.y).scale(t2.k));
-               } else {
-                   projection.transform(t2);
-                   _transformStart = t2;
-                   _selection.call(_zoomerPanner.transform, _transformStart);
-               }
+           groups = groups.merge(groupsEnter).attr('transform', turnTransform);
+           groups.select('rect'); // propagate bound data

 
 

-               return true;
-           }
+           groups.select('circle'); // propagate bound data

 
 

+           return this;
+         }

 
 

-           function setCenterZoom(loc2, z2, duration, force) {
-               var c = map.center();
-               var z = map.zoom();
-               if (loc2[0] === c[0] && loc2[1] === c[1] && z2 === z && !force) { return false; }
+         return drawTurns;
+       }

 
 

-               var proj = geoRawMercator().transform(projection.transform());  // copy projection
+       function svgVertices(projection, context) {
+         var radiuses = {
+           //       z16-, z17,   z18+,  w/icon
+           shadow: [6, 7.5, 7.5, 12],
+           stroke: [2.5, 3.5, 3.5, 8],
+           fill: [1, 1.5, 1.5, 1.5]
+         };

 
 

-               var k2 = clamp(geoZoomToScale(z2, TILESIZE), kMin, kMax);
-               proj.scale(k2);
+         var _currHoverTarget;

 
 

-               var t = proj.translate();
-               var point = proj(loc2);
+         var _currPersistent = {};
+         var _currHover = {};
+         var _prevHover = {};
+         var _currSelected = {};
+         var _prevSelected = {};
+         var _radii = {};

 
 

-               var center = pxCenter();
-               t[0] += center[0] - point[0];
-               t[1] += center[1] - point[1];
+         function sortY(a, b) {
+           return b.loc[1] - a.loc[1];
+         } // Avoid exit/enter if we're just moving stuff around.
+         // The node will get a new version but we only need to run the update selection.

 
 

-               return setTransform(identity$2.translate(t[0], t[1]).scale(k2), duration, force);
-           }

 
 

+         function fastEntityKey(d) {
+           var mode = context.mode();
+           var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+           return isMoving ? d.id : osmEntity.key(d);
+         }
+
+         function draw(selection, graph, vertices, sets, filter) {
+           sets = sets || {
+             selected: {},
+             important: {},
+             hovered: {}
+           };
+           var icons = {};
+           var directions = {};
+           var wireframe = context.surface().classed('fill-wireframe');
+           var zoom = geoScaleToZoom(projection.scale());
+           var z = zoom < 17 ? 0 : zoom < 18 ? 1 : 2;
+           var activeID = context.activeID();
+           var base = context.history().base();
+
+           function getIcon(d) {
+             // always check latest entity, as fastEntityKey avoids enter/exit now
+             var entity = graph.entity(d.id);
+             if (entity.id in icons) return icons[entity.id];
+             icons[entity.id] = entity.hasInterestingTags() && _mainPresetIndex.match(entity, graph).icon;
+             return icons[entity.id];
+           } // memoize directions results, return false for empty arrays (for use in filter)
+
+
+           function getDirections(entity) {
+             if (entity.id in directions) return directions[entity.id];
+             var angles = entity.directions(graph, projection);
+             directions[entity.id] = angles.length ? angles : false;
+             return angles;
+           }
+
+           function updateAttributes(selection) {
+             ['shadow', 'stroke', 'fill'].forEach(function (klass) {
+               var rads = radiuses[klass];
+               selection.selectAll('.' + klass).each(function (entity) {
+                 var i = z && getIcon(entity);
+                 var r = rads[i ? 3 : z]; // slightly increase the size of unconnected endpoints #3775
+
+                 if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
+                   r += 1.5;
+                 }

 
 

-           map.pan = function(delta, duration) {
-               var t = projection.translate();
-               var k = projection.scale();
+                 if (klass === 'shadow') {
+                   // remember this value, so we don't need to
+                   _radii[entity.id] = r; // recompute it when we draw the touch targets
+                 }

 
 

-               t[0] += delta[0];
-               t[1] += delta[1];
+                 select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
+               });
+             });
+           }

 
 

-               if (duration) {
-                   _selection
-                       .transition()
-                       .duration(duration)
-                       .on('start', function() { map.startEase(); })
-                       .call(_zoomerPanner.transform, identity$2.translate(t[0], t[1]).scale(k));
-               } else {
-                   projection.translate(t);
-                   _transformStart = projection.transform();
-                   _selection.call(_zoomerPanner.transform, _transformStart);
-                   dispatch$1.call('move', this, map);
-                   immediateRedraw();
-               }
+           vertices.sort(sortY);
+           var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit

 
 

-               return map;
-           };
+           groups.exit().remove(); // enter

 
 

+           var enter = groups.enter().append('g').attr('class', function (d) {
+             return 'node vertex ' + d.id;
+           }).order();
+           enter.append('circle').attr('class', 'shadow');
+           enter.append('circle').attr('class', 'stroke'); // Vertices with tags get a fill.

 
 

-           map.dimensions = function(val) {
-               if (!arguments.length) { return _dimensions; }
+           enter.filter(function (d) {
+             return d.hasInterestingTags();
+           }).append('circle').attr('class', 'fill'); // update

 
 

-               _dimensions = val;
-               drawLayers.dimensions(_dimensions);
-               context.background().dimensions(_dimensions);
-               projection.clipExtent([[0, 0], _dimensions]);
-               _getMouseCoords = utilFastMouse(supersurface.node());
+           groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('sibling', function (d) {
+             return d.id in sets.selected;
+           }).classed('shared', function (d) {
+             return graph.isShared(d);
+           }).classed('endpoint', function (d) {
+             return d.isEndpoint(graph);
+           }).classed('added', function (d) {
+             return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
+           }).classed('moved', function (d) {
+             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
+           }).classed('retagged', function (d) {
+             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+           }).call(updateAttributes); // Vertices with icons get a `use`.

 
 

-               scheduleRedraw();
-               return map;
-           };
+           var iconUse = groups.selectAll('.icon').data(function data(d) {
+             return zoom >= 17 && getIcon(d) ? [d] : [];
+           }, fastEntityKey); // exit

 
 

+           iconUse.exit().remove(); // enter

 
 

-           function zoomIn(delta) {
-               setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
-           }
+           iconUse.enter().append('use').attr('class', 'icon').attr('width', '11px').attr('height', '11px').attr('transform', 'translate(-5.5, -5.5)').attr('xlink:href', function (d) {
+             var picon = getIcon(d);
+             var isMaki = /^maki-/.test(picon);
+             return '#' + picon + (isMaki ? '-11' : '');
+           }); // Vertices with directions get viewfields

 
 

-           function zoomOut(delta) {
-               setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
-           }
+           var dgroups = groups.selectAll('.viewfieldgroup').data(function data(d) {
+             return zoom >= 18 && getDirections(d) ? [d] : [];
+           }, fastEntityKey); // exit

 
 

-           map.zoomIn = function() { zoomIn(1); };
-           map.zoomInFurther = function() { zoomIn(4); };
-           map.canZoomIn = function() { return map.zoom() < maxZoom; };
+           dgroups.exit().remove(); // enter/update

 
 

-           map.zoomOut = function() { zoomOut(1); };
-           map.zoomOutFurther = function() { zoomOut(4); };
-           map.canZoomOut = function() { return map.zoom() > minZoom; };
+           dgroups = dgroups.enter().insert('g', '.shadow').attr('class', 'viewfieldgroup').merge(dgroups);
+           var viewfields = dgroups.selectAll('.viewfield').data(getDirections, function key(d) {
+             return osmEntity.key(d);
+           }); // exit

 
 

-           map.center = function(loc2) {
-               if (!arguments.length) {
-                   return projection.invert(pxCenter());
-               }
+           viewfields.exit().remove(); // enter/update

 
 

-               if (setCenterZoom(loc2, map.zoom())) {
-                   dispatch$1.call('move', this, map);
-               }
+           viewfields.enter().append('path').attr('class', 'viewfield').attr('d', 'M0,0H0').merge(viewfields).attr('marker-start', 'url(#ideditor-viewfield-marker' + (wireframe ? '-wireframe' : '') + ')').attr('transform', function (d) {
+             return 'rotate(' + d + ')';
+           });
+         }

 
 

-               scheduleRedraw();
-               return map;
+         function drawTargets(selection, graph, entities, filter) {
+           var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+           var getTransform = svgPointTransform(projection).geojson;
+           var activeID = context.activeID();
+           var data = {
+             targets: [],
+             nopes: []

            };
            };

+           entities.forEach(function (node) {
+             if (activeID === node.id) return; // draw no target on the activeID

 
 

-           map.unobscuredCenterZoomEase = function(loc, zoom) {
-               var offset = map.unobscuredOffsetPx();
+             var vertexType = svgPassiveVertex(node, graph, activeID);

 
 

-               var proj = geoRawMercator().transform(projection.transform());  // copy projection
-               // use the target zoom to calculate the offset center
-               proj.scale(geoZoomToScale(zoom, TILESIZE));
+             if (vertexType !== 0) {
+               // passive or adjacent - allow to connect
+               data.targets.push({
+                 type: 'Feature',
+                 id: node.id,
+                 properties: {
+                   target: true,
+                   entity: node
+                 },
+                 geometry: node.asGeoJSON()
+               });
+             } else {
+               data.nopes.push({
+                 type: 'Feature',
+                 id: node.id + '-nope',
+                 properties: {
+                   nope: true,
+                   target: true,
+                   entity: node
+                 },
+                 geometry: node.asGeoJSON()
+               });
+             }
+           }); // Targets allow hover and vertex snapping

 
 

-               var locPx = proj(loc);
-               var offsetLocPx = [locPx[0] + offset[0], locPx[1] + offset[1]];
-               var offsetLoc = proj.invert(offsetLocPx);
+           var targets = selection.selectAll('.vertex.target-allowed').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(data.targets, function key(d) {
+             return d.id;
+           }); // exit

 
 

-               map.centerZoomEase(offsetLoc, zoom);
-           };
+           targets.exit().remove(); // enter/update

 
 

-           map.unobscuredOffsetPx = function() {
-               var openPane = context.container().select('.map-panes .map-pane.shown');
-               if (!openPane.empty()) {
-                   return [openPane.node().offsetWidth/2, 0];
-               }
-               return [0, 0];
-           };
+           targets.enter().append('circle').attr('r', function (d) {
+             return _radii[d.id] || radiuses.shadow[3];
+           }).merge(targets).attr('class', function (d) {
+             return 'node vertex target target-allowed ' + targetClass + d.id;
+           }).attr('transform', getTransform); // NOPE

 
 

-           map.zoom = function(z2) {
-               if (!arguments.length) {
-                   return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
-               }
+           var nopes = selection.selectAll('.vertex.target-nope').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(data.nopes, function key(d) {
+             return d.id;
+           }); // exit

 
 

-               if (z2 < _minzoom) {
-                   surface.interrupt();
-                   dispatch$1.call('hitMinZoom', this, map);
-                   z2 = context.minEditableZoom();
-               }
+           nopes.exit().remove(); // enter/update

 
 

-               if (setCenterZoom(map.center(), z2)) {
-                   dispatch$1.call('move', this, map);
-               }
+           nopes.enter().append('circle').attr('r', function (d) {
+             return _radii[d.properties.entity.id] || radiuses.shadow[3];
+           }).merge(nopes).attr('class', function (d) {
+             return 'node vertex target target-nope ' + nopeClass + d.id;
+           }).attr('transform', getTransform);
+         } // Points can also render as vertices:
+         // 1. in wireframe mode or
+         // 2. at higher zooms if they have a direction

 
 

-               scheduleRedraw();
-               return map;
-           };

 
 

+         function renderAsVertex(entity, graph, wireframe, zoom) {
+           var geometry = entity.geometry(graph);
+           return geometry === 'vertex' || geometry === 'point' && (wireframe || zoom >= 18 && entity.directions(graph, projection).length);
+         }

 
 

-           map.centerZoom = function(loc2, z2) {
-               if (setCenterZoom(loc2, z2)) {
-                   dispatch$1.call('move', this, map);
-               }
+         function isEditedNode(node, base, head) {
+           var baseNode = base.entities[node.id];
+           var headNode = head.entities[node.id];
+           return !headNode || !baseNode || !fastDeepEqual(headNode.tags, baseNode.tags) || !fastDeepEqual(headNode.loc, baseNode.loc);
+         }

 
 

-               scheduleRedraw();
-               return map;
-           };
+         function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
+           var results = {};
+           var seenIds = {};

 
 

+           function addChildVertices(entity) {
+             // avoid redundant work and infinite recursion of circular relations
+             if (seenIds[entity.id]) return;
+             seenIds[entity.id] = true;
+             var geometry = entity.geometry(graph);

 
 

-           map.zoomTo = function(entity) {
-               var extent = entity.extent(context.graph());
-               if (!isFinite(extent.area())) { return map; }
+             if (!context.features().isHiddenFeature(entity, graph, geometry)) {
+               var i;

 
 

-               var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-               return map.centerZoom(extent.center(), z2);
-           };
+               if (entity.type === 'way') {
+                 for (i = 0; i < entity.nodes.length; i++) {
+                   var child = graph.hasEntity(entity.nodes[i]);

 
 

+                   if (child) {
+                     addChildVertices(child);
+                   }
+                 }
+               } else if (entity.type === 'relation') {
+                 for (i = 0; i < entity.members.length; i++) {
+                   var member = graph.hasEntity(entity.members[i].id);

 
 

-           map.centerEase = function(loc2, duration) {
-               duration = duration || 250;
-               setCenterZoom(loc2, map.zoom(), duration);
-               return map;
-           };
+                   if (member) {
+                     addChildVertices(member);
+                   }
+                 }
+               } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
+                 results[entity.id] = entity;
+               }
+             }
+           }

 
 

+           ids.forEach(function (id) {
+             var entity = graph.hasEntity(id);
+             if (!entity) return;

 
 

-           map.zoomEase = function(z2, duration) {
-               duration = duration || 250;
-               setCenterZoom(map.center(), z2, duration, false);
-               return map;
-           };
+             if (entity.type === 'node') {
+               if (renderAsVertex(entity, graph, wireframe, zoom)) {
+                 results[entity.id] = entity;
+                 graph.parentWays(entity).forEach(function (entity) {
+                   addChildVertices(entity);
+                 });
+               }
+             } else {
+               // way, relation
+               addChildVertices(entity);
+             }
+           });
+           return results;
+         }

 
 

+         function drawVertices(selection, graph, entities, filter, extent, fullRedraw) {
+           var wireframe = context.surface().classed('fill-wireframe');
+           var visualDiff = context.surface().classed('highlight-edited');
+           var zoom = geoScaleToZoom(projection.scale());
+           var mode = context.mode();
+           var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+           var base = context.history().base();
+           var drawLayer = selection.selectAll('.layer-osm.points .points-group.vertices');
+           var touchLayer = selection.selectAll('.layer-touch.points');
+
+           if (fullRedraw) {
+             _currPersistent = {};
+             _radii = {};
+           } // Collect important vertices from the `entities` list..
+           // (during a partial redraw, it will not contain everything)
+
+
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             var geometry = entity.geometry(graph);
+             var keep = false; // a point that looks like a vertex..
+
+             if (geometry === 'point' && renderAsVertex(entity, graph, wireframe, zoom)) {
+               _currPersistent[entity.id] = entity;
+               keep = true; // a vertex of some importance..
+             } else if (geometry === 'vertex' && (entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || visualDiff && isEditedNode(entity, base, graph))) {
+               _currPersistent[entity.id] = entity;
+               keep = true;
+             } // whatever this is, it's not a persistent vertex..
+
+
+             if (!keep && !fullRedraw) {
+               delete _currPersistent[entity.id];
+             }
+           } // 3 sets of vertices to consider:

 
 

-           map.centerZoomEase = function(loc2, z2, duration) {
-               duration = duration || 250;
-               setCenterZoom(loc2, z2, duration, false);
-               return map;
-           };

 
 

+           var sets = {
+             persistent: _currPersistent,
+             // persistent = important vertices (render always)
+             selected: _currSelected,
+             // selected + siblings of selected (render always)
+             hovered: _currHover // hovered + siblings of hovered (render only in draw modes)

 
 

-           map.transformEase = function(t2, duration) {
-               duration = duration || 250;
-               setTransform(t2, duration, false /* don't force */);
-               return map;

            };
            };

+           var all = Object.assign({}, isMoving ? _currHover : {}, _currSelected, _currPersistent); // Draw the vertices..
+           // The filter function controls the scope of what objects d3 will touch (exit/enter/update)
+           // Adjust the filter function to expand the scope beyond whatever entities were passed in.

 
 

+           var filterRendered = function filterRendered(d) {
+             return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
+           };

 
 

-           map.zoomToEase = function(obj, duration) {
-               var extent;
-               if (Array.isArray(obj)) {
-                   obj.forEach(function(entity) {
-                       var entityExtent = entity.extent(context.graph());
-                       if (!extent) {
-                           extent = entityExtent;
-                       } else {
-                           extent = extent.extend(entityExtent);
-                       }
-                   });
-               } else {
-                   extent = obj.extent(context.graph());
-               }
-               if (!isFinite(extent.area())) { return map; }
+           drawLayer.call(draw, graph, currentVisible(all), sets, filterRendered); // Draw touch targets..
+           // When drawing, render all targets (not just those affected by a partial redraw)

 
 

-               var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-               return map.centerZoomEase(extent.center(), z2, duration);
+           var filterTouch = function filterTouch(d) {
+             return isMoving ? true : filterRendered(d);

            };
 
            };
 

+           touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);

 
 

-           map.startEase = function() {
-               utilBindOnce(surface, _pointerPrefix + 'down.ease', function() {
-                   map.cancelEase();
-               });
-               return map;
-           };
+           function currentVisible(which) {
+             return Object.keys(which).map(graph.hasEntity, graph) // the current version of this entity
+             .filter(function (entity) {
+               return entity && entity.intersects(extent, graph);
+             });
+           }
+         } // partial redraw - only update the selected items..

 
 
 
 

-           map.cancelEase = function() {
-               _selection.interrupt();
-               return map;
-           };
+         drawVertices.drawSelected = function (selection, graph, extent) {
+           var wireframe = context.surface().classed('fill-wireframe');
+           var zoom = geoScaleToZoom(projection.scale());
+           _prevSelected = _currSelected || {};

 
 

+           if (context.map().isInWideSelection()) {
+             _currSelected = {};
+             context.selectedIDs().forEach(function (id) {
+               var entity = graph.hasEntity(id);
+               if (!entity) return;

 
 

-           map.extent = function(val) {
-               if (!arguments.length) {
-                   return new geoExtent(
-                       projection.invert([0, _dimensions[1]]),
-                       projection.invert([_dimensions[0], 0])
-                   );
-               } else {
-                   var extent = geoExtent(val);
-                   map.centerZoom(extent.center(), map.extentZoom(extent));
+               if (entity.type === 'node') {
+                 if (renderAsVertex(entity, graph, wireframe, zoom)) {
+                   _currSelected[entity.id] = entity;
+                 }

                }
                }

-           };
+             });
+           } else {
+             _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
+           } // note that drawVertices will add `_currSelected` automatically if needed..

 
 
 
 

-           map.trimmedExtent = function(val) {
-               if (!arguments.length) {
-                   var headerY = 71;
-                   var footerY = 30;
-                   var pad = 10;
-                   return new geoExtent(
-                       projection.invert([pad, _dimensions[1] - footerY - pad]),
-                       projection.invert([_dimensions[0] - pad, headerY + pad])
-                   );
-               } else {
-                   var extent = geoExtent(val);
-                   map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
-               }
+           var filter = function filter(d) {
+             return d.id in _prevSelected;

            };
 
            };
 

+           drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
+         }; // partial redraw - only update the hovered items..

 
 

-           function calcExtentZoom(extent, dim) {
-               var tl = projection([extent[0][0], extent[1][1]]);
-               var br = projection([extent[1][0], extent[0][1]]);

 
 

-               // Calculate maximum zoom that fits extent
-               var hFactor = (br[0] - tl[0]) / dim[0];
-               var vFactor = (br[1] - tl[1]) / dim[1];
-               var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
-               var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
-               var newZoom = map.zoom() - Math.max(hZoomDiff, vZoomDiff);
-
-               return newZoom;
-           }
+         drawVertices.drawHover = function (selection, graph, target, extent) {
+           if (target === _currHoverTarget) return; // continue only if something changed

 
 

+           var wireframe = context.surface().classed('fill-wireframe');
+           var zoom = geoScaleToZoom(projection.scale());
+           _prevHover = _currHover || {};
+           _currHoverTarget = target;
+           var entity = target && target.properties && target.properties.entity;

 
 

-           map.extentZoom = function(val) {
-               return calcExtentZoom(geoExtent(val), _dimensions);
-           };
+           if (entity) {
+             _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
+           } else {
+             _currHover = {};
+           } // note that drawVertices will add `_currHover` automatically if needed..

 
 
 
 

-           map.trimmedExtentZoom = function(val) {
-               var trimY = 120;
-               var trimX = 40;
-               var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
-               return calcExtentZoom(geoExtent(val), trimmed);
+           var filter = function filter(d) {
+             return d.id in _prevHover;

            };
 
            };
 

+           drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
+         };

 
 

-           map.withinEditableZoom = function() {
-               return map.zoom() >= context.minEditableZoom();
-           };
-
+         return drawVertices;
+       }

 
 

-           map.isInWideSelection = function() {
-               return !map.withinEditableZoom() && context.selectedIDs().length;
-           };
+       function utilBindOnce(target, type, listener, capture) {
+         var typeOnce = type + '.once';

 
 

+         function one() {
+           target.on(typeOnce, null);
+           listener.apply(this, arguments);
+         }

 
 

-           map.editableDataEnabled = function(skipZoomCheck) {
+         target.on(typeOnce, one, capture);
+         return this;
+       }

 
 

-               var layer = context.layers().layer('osm');
-               if (!layer || !layer.enabled()) { return false; }
+       function defaultFilter(d3_event) {
+         return !d3_event.ctrlKey && !d3_event.button;
+       }

 
 

-               return skipZoomCheck || map.withinEditableZoom();
-           };
+       function defaultExtent() {
+         var e = this;

 
 

+         if (e instanceof SVGElement) {
+           e = e.ownerSVGElement || e;

 
 

-           map.notesEditable = function() {
-               var layer = context.layers().layer('notes');
-               if (!layer || !layer.enabled()) { return false; }
+           if (e.hasAttribute('viewBox')) {
+             e = e.viewBox.baseVal;
+             return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+           }

 
 

-               return map.withinEditableZoom();
-           };
+           return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
+         }

 
 

+         return [[0, 0], [e.clientWidth, e.clientHeight]];
+       }

 
 

-           map.minzoom = function(val) {
-               if (!arguments.length) { return _minzoom; }
-               _minzoom = val;
-               return map;
-           };
+       function defaultWheelDelta(d3_event) {
+         return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
+       }

 
 

+       function defaultConstrain(transform, extent, translateExtent) {
+         var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
+             dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
+             dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
+             dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
+         return transform.translate(dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1));
+       }

 
 

-           map.toggleHighlightEdited = function() {
-               surface.classed('highlight-edited', !surface.classed('highlight-edited'));
-               map.pan([0,0]);  // trigger a redraw
-               dispatch$1.call('changeHighlighting', this);
-           };
+       function utilZoomPan() {
+         var filter = defaultFilter,
+             extent = defaultExtent,
+             constrain = defaultConstrain,
+             wheelDelta = defaultWheelDelta,
+             scaleExtent = [0, Infinity],
+             translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
+             interpolate = interpolateZoom,
+             dispatch = dispatch$8('start', 'zoom', 'end'),
+             _wheelDelay = 150,
+             _transform = identity$2,
+             _activeGesture;

 
 

+         function zoom(selection) {
+           selection.on('pointerdown.zoom', pointerdown).on('wheel.zoom', wheeled).style('touch-action', 'none').style('-webkit-tap-highlight-color', 'rgba(0,0,0,0)');
+           select(window).on('pointermove.zoompan', pointermove).on('pointerup.zoompan pointercancel.zoompan', pointerup);
+         }

 
 

-           map.areaFillOptions = ['wireframe', 'partial', 'full'];
+         zoom.transform = function (collection, transform, point) {
+           var selection = collection.selection ? collection.selection() : collection;

 
 

-           map.activeAreaFill = function(val) {
-               if (!arguments.length) { return corePreferences('area-fill') || 'partial'; }
+           if (collection !== selection) {
+             schedule(collection, transform, point);
+           } else {
+             selection.interrupt().each(function () {
+               gesture(this, arguments).start(null).zoom(null, null, typeof transform === 'function' ? transform.apply(this, arguments) : transform).end(null);
+             });
+           }
+         };

 
 

-               corePreferences('area-fill', val);
-               if (val !== 'wireframe') {
-                   corePreferences('area-fill-toggle', val);
-               }
-               updateAreaFill();
-               map.pan([0,0]);  // trigger a redraw
-               dispatch$1.call('changeAreaFill', this);
-               return map;
-           };
+         zoom.scaleBy = function (selection, k, p) {
+           zoom.scaleTo(selection, function () {
+             var k0 = _transform.k,
+                 k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
+             return k0 * k1;
+           }, p);
+         };

 
 

-           map.toggleWireframe = function() {
+         zoom.scaleTo = function (selection, k, p) {
+           zoom.transform(selection, function () {
+             var e = extent.apply(this, arguments),
+                 t0 = _transform,
+                 p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p,
+                 p1 = t0.invert(p0),
+                 k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
+             return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
+           }, p);
+         };

 
 

-               var activeFill = map.activeAreaFill();
+         zoom.translateBy = function (selection, x, y) {
+           zoom.transform(selection, function () {
+             return constrain(_transform.translate(typeof x === 'function' ? x.apply(this, arguments) : x, typeof y === 'function' ? y.apply(this, arguments) : y), extent.apply(this, arguments), translateExtent);
+           });
+         };

 
 

-               if (activeFill === 'wireframe') {
-                   activeFill = corePreferences('area-fill-toggle') || 'partial';
-               } else {
-                   activeFill = 'wireframe';
-               }
+         zoom.translateTo = function (selection, x, y, p) {
+           zoom.transform(selection, function () {
+             var e = extent.apply(this, arguments),
+                 t = _transform,
+                 p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p;
+             return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(typeof x === 'function' ? -x.apply(this, arguments) : -x, typeof y === 'function' ? -y.apply(this, arguments) : -y), e, translateExtent);
+           }, p);
+         };

 
 

-               map.activeAreaFill(activeFill);
-           };
+         function scale(transform, k) {
+           k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
+           return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
+         }

 
 

-           function updateAreaFill() {
-               var activeFill = map.activeAreaFill();
-               map.areaFillOptions.forEach(function(opt) {
-                   surface.classed('fill-' + opt, Boolean(opt === activeFill));
-               });
-           }
+         function translate(transform, p0, p1) {
+           var x = p0[0] - p1[0] * transform.k,
+               y = p0[1] - p1[1] * transform.k;
+           return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+         }

 
 

+         function centroid(extent) {
+           return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
+         }

 
 

-           map.layers = function () { return drawLayers; };
+         function schedule(transition, transform, point) {
+           transition.on('start.zoom', function () {
+             gesture(this, arguments).start(null);
+           }).on('interrupt.zoom end.zoom', function () {
+             gesture(this, arguments).end(null);
+           }).tween('zoom', function () {
+             var that = this,
+                 args = arguments,
+                 g = gesture(that, args),
+                 e = extent.apply(that, args),
+                 p = !point ? centroid(e) : typeof point === 'function' ? point.apply(that, args) : point,
+                 w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
+                 a = _transform,
+                 b = typeof transform === 'function' ? transform.apply(that, args) : transform,
+                 i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
+             return function (t) {
+               if (t === 1) {
+                 // Avoid rounding error on end.
+                 t = b;
+               } else {
+                 var l = i(t);
+                 var k = w / l[2];
+                 t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
+               }

 
 

+               g.zoom(null, null, t);
+             };
+           });
+         }

 
 

-           map.doubleUpHandler = function() {
-               return _doubleUpHandler;
-           };
+         function gesture(that, args, clean) {
+           return !clean && _activeGesture || new Gesture(that, args);
+         }

 
 

+         function Gesture(that, args) {
+           this.that = that;
+           this.args = args;
+           this.active = 0;
+           this.extent = extent.apply(that, args);
+         }

 
 

-           return utilRebind(map, dispatch$1, 'on');
-       }
+         Gesture.prototype = {
+           start: function start(d3_event) {
+             if (++this.active === 1) {
+               _activeGesture = this;
+               dispatch.call('start', this, d3_event);
+             }

 
 

-       function rendererPhotos(context) {
-           var dispatch$1 = dispatch('change');
-           var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
-           var _allPhotoTypes = ['flat', 'panoramic'];
-           var _shownPhotoTypes = _allPhotoTypes.slice();   // shallow copy
+             return this;
+           },
+           zoom: function zoom(d3_event, key, transform) {
+             if (this.mouse && key !== 'mouse') this.mouse[1] = transform.invert(this.mouse[0]);
+             if (this.pointer0 && key !== 'touch') this.pointer0[1] = transform.invert(this.pointer0[0]);
+             if (this.pointer1 && key !== 'touch') this.pointer1[1] = transform.invert(this.pointer1[0]);
+             _transform = transform;
+             dispatch.call('zoom', this, d3_event, key, transform);
+             return this;
+           },
+           end: function end(d3_event) {
+             if (--this.active === 0) {
+               _activeGesture = null;
+               dispatch.call('end', this, d3_event);
+             }

 
 

-           function photos() {}
+             return this;
+           }
+         };

 
 

-           function updateStorage() {
-               if (window.mocha) { return; }
+         function wheeled(d3_event) {
+           if (!filter.apply(this, arguments)) return;
+           var g = gesture(this, arguments),
+               t = _transform,
+               k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
+               p = utilFastMouse(this)(d3_event); // If the mouse is in the same location as before, reuse it.
+           // If there were recent wheel events, reset the wheel idle timeout.

 
 

-               var hash = utilStringQs(window.location.hash);
-               var enabled = context.layers().all().filter(function(d) {
-                   return _layerIDs.indexOf(d.id) !== -1 && d.layer && d.layer.supported() && d.layer.enabled();
-               }).map(function(d) {
-                   return d.id;
-               });
-               if (enabled.length) {
-                   hash.photo_overlay = enabled.join(',');
-               } else {
-                   delete hash.photo_overlay;
-               }
-               window.location.replace('#' + utilQsString(hash, true));
-           }
+           if (g.wheel) {
+             if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
+               g.mouse[1] = t.invert(g.mouse[0] = p);
+             }

 
 

-           photos.overlayLayerIDs = function() {
-               return _layerIDs;
-           };
+             clearTimeout(g.wheel); // Otherwise, capture the mouse point and location at the start.
+           } else {
+             g.mouse = [p, t.invert(p)];
+             interrupt(this);
+             g.start(d3_event);
+           }

 
 

-           photos.allPhotoTypes = function() {
-               return _allPhotoTypes;
-           };
+           d3_event.preventDefault();
+           d3_event.stopImmediatePropagation();
+           g.wheel = setTimeout(wheelidled, _wheelDelay);
+           g.zoom(d3_event, 'mouse', constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));

 
 

-           function showsLayer(id) {
-               var layer = context.layers().layer(id);
-               return layer && layer.supported() && layer.enabled();
+           function wheelidled() {
+             g.wheel = null;
+             g.end(d3_event);

            }
            }

+         }

 
 

-           photos.shouldFilterByPhotoType = function() {
-               return showsLayer('mapillary') ||
-                   (showsLayer('streetside') && showsLayer('openstreetcam'));
-           };
-
-           photos.showsPhotoType = function(val) {
-               if (!photos.shouldFilterByPhotoType()) { return true; }
+         var _downPointerIDs = new Set();

 
 

-               return _shownPhotoTypes.indexOf(val) !== -1;
-           };
+         var _pointerLocGetter;

 
 

-           photos.showsFlat = function() {
-               return photos.showsPhotoType('flat');
-           };
+         function pointerdown(d3_event) {
+           _downPointerIDs.add(d3_event.pointerId);

 
 

-           photos.showsPanoramic = function() {
-               return photos.showsPhotoType('panoramic');
-           };
+           if (!filter.apply(this, arguments)) return;
+           var g = gesture(this, arguments, _downPointerIDs.size === 1);
+           var started;
+           d3_event.stopImmediatePropagation();
+           _pointerLocGetter = utilFastMouse(this);

 
 

-           photos.togglePhotoType = function(val) {
-               var index = _shownPhotoTypes.indexOf(val);
-               if (index !== -1) {
-                   _shownPhotoTypes.splice(index, 1);
-               } else {
-                   _shownPhotoTypes.push(val);
-               }
-               dispatch$1.call('change', this);
-               return photos;
-           };
+           var loc = _pointerLocGetter(d3_event);

 
 

-           photos.init = function() {
-               var hash = utilStringQs(window.location.hash);
-               if (hash.photo_overlay) {
-                   var hashOverlayIDs = hash.photo_overlay.replace(/;/g, ',').split(',');
-                   hashOverlayIDs.forEach(function(id) {
-                       var layer = context.layers().layer(id);
-                       if (layer) { layer.enabled(true); }
-                   });
-               }
+           var p = [loc, _transform.invert(loc), d3_event.pointerId];

 
 

-               context.layers().on('change.rendererPhotos', updateStorage);
-           };
+           if (!g.pointer0) {
+             g.pointer0 = p;
+             started = true;
+           } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
+             g.pointer1 = p;
+           }

 
 

-           return utilRebind(photos, dispatch$1, 'on');
-       }
+           if (started) {
+             interrupt(this);
+             g.start(d3_event);
+           }
+         }

 
 

-       function uiAccount(context) {
-           var osm = context.connection();
+         function pointermove(d3_event) {
+           if (!_downPointerIDs.has(d3_event.pointerId)) return;
+           if (!_activeGesture || !_pointerLocGetter) return;
+           var g = gesture(this, arguments);
+           var isPointer0 = g.pointer0 && g.pointer0[2] === d3_event.pointerId;
+           var isPointer1 = !isPointer0 && g.pointer1 && g.pointer1[2] === d3_event.pointerId;

 
 

+           if ((isPointer0 || isPointer1) && 'buttons' in d3_event && !d3_event.buttons) {
+             // The pointer went up without ending the gesture somehow, e.g.
+             // a down mouse was moved off the map and released. End it here.
+             if (g.pointer0) _downPointerIDs["delete"](g.pointer0[2]);
+             if (g.pointer1) _downPointerIDs["delete"](g.pointer1[2]);
+             g.end(d3_event);
+             return;
+           }

 
 

-           function update(selection) {
-               if (!osm) { return; }
+           d3_event.preventDefault();
+           d3_event.stopImmediatePropagation();

 
 

-               if (!osm.authenticated()) {
-                   selection.selectAll('.userLink, .logoutLink')
-                       .classed('hide', true);
-                   return;
-               }
+           var loc = _pointerLocGetter(d3_event);

 
 

-               osm.userDetails(function(err, details) {
-                   var userLink = selection.select('.userLink'),
-                       logoutLink = selection.select('.logoutLink');
+           var t, p, l;
+           if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
+           t = _transform;

 
 

-                   userLink.html('');
-                   logoutLink.html('');
+           if (g.pointer1) {
+             var p0 = g.pointer0[0],
+                 l0 = g.pointer0[1],
+                 p1 = g.pointer1[0],
+                 l1 = g.pointer1[1],
+                 dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
+                 dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
+             t = scale(t, Math.sqrt(dp / dl));
+             p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
+             l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
+           } else if (g.pointer0) {
+             p = g.pointer0[0];
+             l = g.pointer0[1];
+           } else {
+             return;
+           }

 
 

-                   if (err || !details) { return; }
+           g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
+         }

 
 

-                   selection.selectAll('.userLink, .logoutLink')
-                       .classed('hide', false);
+         function pointerup(d3_event) {
+           if (!_downPointerIDs.has(d3_event.pointerId)) return;

 
 

-                   // Link
-                   userLink.append('a')
-                       .attr('href', osm.userURL(details.display_name))
-                       .attr('target', '_blank');
+           _downPointerIDs["delete"](d3_event.pointerId);

 
 

-                   // Add thumbnail or dont
-                   if (details.image_url) {
-                       userLink.append('img')
-                           .attr('class', 'icon pre-text user-icon')
-                           .attr('src', details.image_url);
-                   } else {
-                       userLink
-                           .call(svgIcon('#iD-icon-avatar', 'pre-text light'));
-                   }
+           if (!_activeGesture) return;
+           var g = gesture(this, arguments);
+           d3_event.stopImmediatePropagation();
+           if (g.pointer0 && g.pointer0[2] === d3_event.pointerId) delete g.pointer0;else if (g.pointer1 && g.pointer1[2] === d3_event.pointerId) delete g.pointer1;

 
 

-                   // Add user name
-                   userLink.append('span')
-                       .attr('class', 'label')
-                       .text(details.display_name);
-
-                   logoutLink.append('a')
-                       .attr('class', 'logout')
-                       .attr('href', '#')
-                       .text(_t('logout'))
-                       .on('click.logout', function() {
-                           event.preventDefault();
-                           osm.logout();
-                       });
-               });
+           if (g.pointer1 && !g.pointer0) {
+             g.pointer0 = g.pointer1;
+             delete g.pointer1;

            }
 
            }
 

+           if (g.pointer0) {
+             g.pointer0[1] = _transform.invert(g.pointer0[0]);
+           } else {
+             g.end(d3_event);
+           }
+         }

 
 

-           return function(selection) {
-               selection.append('li')
-                   .attr('class', 'logoutLink')
-                   .classed('hide', true);
-
-               selection.append('li')
-                   .attr('class', 'userLink')
-                   .classed('hide', true);
+         zoom.wheelDelta = function (_) {
+           return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
+         };

 
 

-               if (osm) {
-                   osm.on('change.account', function() { update(selection); });
-                   update(selection);
-               }
-           };
-       }
+         zoom.filter = function (_) {
+           return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
+         };

 
 

-       function uiAttribution(context) {
-         var _selection = select(null);
+         zoom.extent = function (_) {
+           return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+         };

 
 

+         zoom.scaleExtent = function (_) {
+           return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+         };

 
 

-         function render(selection, data, klass) {
-           var div = selection.selectAll(("." + klass))
-             .data([0]);
+         zoom.translateExtent = function (_) {
+           return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+         };

 
 

-           div = div.enter()
-             .append('div')
-             .attr('class', klass)
-             .merge(div);
+         zoom.constrain = function (_) {
+           return arguments.length ? (constrain = _, zoom) : constrain;
+         };

 
 

+         zoom.interpolate = function (_) {
+           return arguments.length ? (interpolate = _, zoom) : interpolate;
+         };

 
 

-           var attributions = div.selectAll('.attribution')
-             .data(data, function (d) { return d.id; });
+         zoom._transform = function (_) {
+           return arguments.length ? (_transform = _, zoom) : _transform;
+         };

 
 

-           attributions.exit()
-             .remove();
+         return utilRebind(zoom, dispatch, 'on');
+       }

 
 

-           attributions = attributions.enter()
-             .append('span')
-             .attr('class', 'attribution')
-             .each(function (d, i, nodes) {
-               var attribution = select(nodes[i]);
+       // if pointer events are supported. Falls back to default `dblclick` event.

 
 

-               if (d.terms_html) {
-                 attribution.html(d.terms_html);
-                 return;
-               }
+       function utilDoubleUp() {
+         var dispatch = dispatch$8('doubleUp');
+         var _maxTimespan = 500; // milliseconds

 
 

-               if (d.terms_url) {
-                 attribution = attribution
-                   .append('a')
-                   .attr('href', d.terms_url)
-                   .attr('target', '_blank');
-               }
+         var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices

 
 

-               var sourceID = d.id.replace(/\./g, '<TX_DOT>');
-               var terms_text = _t(("imagery." + sourceID + ".attribution.text"),
-                 { default: d.terms_text || d.id || d.name() }
-               );
+         var _pointer; // object representing the pointer that could trigger double up

 
 

-               if (d.icon && !d.overlay) {
-                 attribution
-                   .append('img')
-                   .attr('class', 'source-image')
-                   .attr('src', d.icon);
-               }

 
 

-               attribution
-                 .append('span')
-                 .attr('class', 'attribution-text')
-                 .text(terms_text);
-             })
-             .merge(attributions);
+         function pointerIsValidFor(loc) {
+           // second pointerup must occur within a small timeframe after the first pointerdown
+           return new Date().getTime() - _pointer.startTime <= _maxTimespan && // all pointer events must occur within a small distance of the first pointerdown
+           geoVecLength(_pointer.startLoc, loc) <= _maxDistance;
+         }

 
 

+         function pointerdown(d3_event) {
+           // ignore right-click
+           if (d3_event.ctrlKey || d3_event.button === 2) return;
+           var loc = [d3_event.clientX, d3_event.clientY]; // Don't rely on pointerId here since it can change between pointerdown
+           // events on touch devices

 
 

-           var copyright = attributions.selectAll('.copyright-notice')
-             .data(function (d) {
-               var notice = d.copyrightNotices(context.map().zoom(), context.map().extent());
-               return notice ? [notice] : [];
-             });
+           if (_pointer && !pointerIsValidFor(loc)) {
+             // if this pointer is no longer valid, clear it so another can be started
+             _pointer = undefined;
+           }

 
 

-           copyright.exit()
-             .remove();
+           if (!_pointer) {
+             _pointer = {
+               startLoc: loc,
+               startTime: new Date().getTime(),
+               upCount: 0,
+               pointerId: d3_event.pointerId
+             };
+           } else {
+             // double down
+             _pointer.pointerId = d3_event.pointerId;
+           }
+         }

 
 

-           copyright = copyright.enter()
-             .append('span')
-             .attr('class', 'copyright-notice')
-             .merge(copyright);
+         function pointerup(d3_event) {
+           // ignore right-click
+           if (d3_event.ctrlKey || d3_event.button === 2) return;
+           if (!_pointer || _pointer.pointerId !== d3_event.pointerId) return;
+           _pointer.upCount += 1;

 
 

-           copyright
-             .text(String);
-         }
+           if (_pointer.upCount === 2) {
+             // double up!
+             var loc = [d3_event.clientX, d3_event.clientY];

 
 

+             if (pointerIsValidFor(loc)) {
+               var locInThis = utilFastMouse(this)(d3_event);
+               dispatch.call('doubleUp', this, d3_event, locInThis);
+             } // clear the pointer info in any case

 
 

-         function update() {
-           var baselayer = context.background().baseLayerSource();
-           _selection
-             .call(render, (baselayer ? [baselayer] : []), 'base-layer-attribution');

 
 

-           var z = context.map().zoom();
-           var overlays = context.background().overlayLayerSources() || [];
-           _selection
-             .call(render, overlays.filter(function (s) { return s.validZoom(z); }), 'overlay-layer-attribution');
+             _pointer = undefined;
+           }

          }
 
          }
 

+         function doubleUp(selection) {
+           if ('PointerEvent' in window) {
+             // dblclick isn't well supported on touch devices so manually use
+             // pointer events if they're available
+             selection.on('pointerdown.doubleUp', pointerdown).on('pointerup.doubleUp', pointerup);
+           } else {
+             // fallback to dblclick
+             selection.on('dblclick.doubleUp', function (d3_event) {
+               dispatch.call('doubleUp', this, d3_event, utilFastMouse(this)(d3_event));
+             });
+           }
+         }

 
 

-         return function(selection) {
-           _selection = selection;
+         doubleUp.off = function (selection) {
+           selection.on('pointerdown.doubleUp', null).on('pointerup.doubleUp', null).on('dblclick.doubleUp', null);
+         };

 
 

-           context.background()
-             .on('change.attribution', update);
+         return utilRebind(doubleUp, dispatch, 'on');
+       }

 
 

-           context.map()
-             .on('move.attribution', throttle(update, 400, { leading: false }));
+       var TILESIZE = 256;
+       var minZoom = 2;
+       var maxZoom = 24;
+       var kMin = geoZoomToScale(minZoom, TILESIZE);
+       var kMax = geoZoomToScale(maxZoom, TILESIZE);

 
 

-           update();
-         };
+       function clamp$1(num, min, max) {
+         return Math.max(min, Math.min(num, max));

        }
 
        }
 

-       function uiContributors(context) {
-           var osm = context.connection(),
-               debouncedUpdate = debounce(function() { update(); }, 1000),
-               limit = 4,
-               hidden = false,
-               wrap = select(null);
+       function rendererMap(context) {
+         var dispatch = dispatch$8('move', 'drawn', 'crossEditableZoom', 'hitMinZoom', 'changeHighlighting', 'changeAreaFill');
+         var projection = context.projection;
+         var curtainProjection = context.curtainProjection;
+         var drawLayers;
+         var drawPoints;
+         var drawVertices;
+         var drawLines;
+         var drawAreas;
+         var drawMidpoints;
+         var drawLabels;

 
 

+         var _selection = select(null);

 
 

-           function update() {
-               if (!osm) { return; }
+         var supersurface = select(null);
+         var wrapper = select(null);
+         var surface = select(null);
+         var _dimensions = [1, 1];
+         var _dblClickZoomEnabled = true;
+         var _redrawEnabled = true;

 
 

-               var users = {},
-                   entities = context.history().intersects(context.map().extent());
+         var _gestureTransformStart;

 
 

-               entities.forEach(function(entity) {
-                   if (entity && entity.user) { users[entity.user] = true; }
-               });
+         var _transformStart = projection.transform();

 
 

-               var u = Object.keys(users),
-                   subset = u.slice(0, u.length > limit ? limit - 1 : limit);
+         var _transformLast;

 
 

-               wrap.html('')
-                   .call(svgIcon('#iD-icon-nearby', 'pre-text light'));
+         var _isTransformed = false;
+         var _minzoom = 0;

 
 

-               var userList = select(document.createElement('span'));
+         var _getMouseCoords;

 
 

-               userList.selectAll()
-                   .data(subset)
-                   .enter()
-                   .append('a')
-                   .attr('class', 'user-link')
-                   .attr('href', function(d) { return osm.userURL(d); })
-                   .attr('target', '_blank')
-                   .text(String);
-
-               if (u.length > limit) {
-                   var count = select(document.createElement('span'));
-
-                   count.append('a')
-                       .attr('target', '_blank')
-                       .attr('href', function() {
-                           return osm.changesetsURL(context.map().center(), context.map().zoom());
-                       })
-                       .text(u.length - limit + 1);
+         var _lastPointerEvent;

 
 

-                   wrap.append('span')
-                       .html(_t('contributors.truncated_list', { users: userList.html(), count: count.html() }));
+         var _lastWithinEditableZoom; // whether a pointerdown event started the zoom

 
 

-               } else {
-                   wrap.append('span')
-                       .html(_t('contributors.list', { users: userList.html() }));
-               }

 
 

-               if (!u.length) {
-                   hidden = true;
-                   wrap
-                       .transition()
-                       .style('opacity', 0);
+         var _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events

 
 

-               } else if (hidden) {
-                   wrap
-                       .transition()
-                       .style('opacity', 1);
-               }
-           }
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom

 
 
 
 

-           return function(selection) {
-               if (!osm) { return; }
-               wrap = selection;
-               update();
+         var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;

 
 

-               osm.on('loaded.contributors', debouncedUpdate);
-               context.map().on('move.contributors', debouncedUpdate);
-           };
-       }
+         var _zoomerPanner = _zoomerPannerFunction().scaleExtent([kMin, kMax]).interpolate(interpolate$1).filter(zoomEventFilter).on('zoom.map', zoomPan).on('start.map', function (d3_event) {
+           _pointerDown = d3_event && (d3_event.type === 'pointerdown' || d3_event.sourceEvent && d3_event.sourceEvent.type === 'pointerdown');
+         }).on('end.map', function () {
+           _pointerDown = false;
+         });

 
 

-       var _popoverID = 0;
+         var _doubleUpHandler = utilDoubleUp();
+
+         var scheduleRedraw = throttle(redraw, 750); // var isRedrawScheduled = false;
+         // var pendingRedrawCall;
+         // function scheduleRedraw() {
+         //     // Only schedule the redraw if one has not already been set.
+         //     if (isRedrawScheduled) return;
+         //     isRedrawScheduled = true;
+         //     var that = this;
+         //     var args = arguments;
+         //     pendingRedrawCall = window.requestIdleCallback(function () {
+         //         // Reset the boolean so future redraws can be set.
+         //         isRedrawScheduled = false;
+         //         redraw.apply(that, args);
+         //     }, { timeout: 1400 });
+         // }

 
 

-       function uiPopover(klass) {
-           var _id = _popoverID++;
-           var _anchorSelection = select(null);
-           var popover = function(selection) {
-               _anchorSelection = selection;
-               selection.each(setup);
-           };
-           var _animation = utilFunctor(false);
-           var _placement = utilFunctor('top'); // top, bottom, left, right
-           var _alignment = utilFunctor('center');  // leading, center, trailing
-           var _scrollContainer = utilFunctor(select(null));
-           var _content;
-           var _displayType = utilFunctor('');
-           var _hasArrow = utilFunctor(true);
-
-           // use pointer events on supported platforms; fallback to mouse events
-           var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-           popover.displayType = function(val) {
-               if (arguments.length) {
-                   _displayType = utilFunctor(val);
-                   return popover;
-               } else {
-                   return _displayType;
-               }
-           };

 
 

-           popover.hasArrow = function(val) {
-               if (arguments.length) {
-                   _hasArrow = utilFunctor(val);
-                   return popover;
-               } else {
-                   return _hasArrow;
-               }
-           };
+         function cancelPendingRedraw() {
+           scheduleRedraw.cancel(); // isRedrawScheduled = false;
+           // window.cancelIdleCallback(pendingRedrawCall);
+         }

 
 

-           popover.placement = function(val) {
-               if (arguments.length) {
-                   _placement = utilFunctor(val);
-                   return popover;
-               } else {
-                   return _placement;
-               }
-           };
+         function map(selection) {
+           _selection = selection;
+           context.on('change.map', immediateRedraw);
+           var osm = context.connection();

 
 

-           popover.alignment = function(val) {
-               if (arguments.length) {
-                   _alignment = utilFunctor(val);
-                   return popover;
-               } else {
-                   return _alignment;
-               }
-           };
+           if (osm) {
+             osm.on('change.map', immediateRedraw);
+           }

 
 

-           popover.scrollContainer = function(val) {
-               if (arguments.length) {
-                   _scrollContainer = utilFunctor(val);
-                   return popover;
-               } else {
-                   return _scrollContainer;
-               }
-           };
+           function didUndoOrRedo(targetTransform) {
+             var mode = context.mode().id;
+             if (mode !== 'browse' && mode !== 'select') return;

 
 

-           popover.content = function(val) {
-               if (arguments.length) {
-                   _content = val;
-                   return popover;
-               } else {
-                   return _content;
-               }
-           };
+             if (targetTransform) {
+               map.transformEase(targetTransform);
+             }
+           }

 
 

-           popover.isShown = function() {
-               var popoverSelection = _anchorSelection.select('.popover-' + _id);
-               return !popoverSelection.empty() && popoverSelection.classed('in');
-           };
+           context.history().on('merge.map', function () {
+             scheduleRedraw();
+           }).on('change.map', immediateRedraw).on('undone.map', function (stack, fromStack) {
+             didUndoOrRedo(fromStack.transform);
+           }).on('redone.map', function (stack) {
+             didUndoOrRedo(stack.transform);
+           });
+           context.background().on('change.map', immediateRedraw);
+           context.features().on('redraw.map', immediateRedraw);
+           drawLayers.on('change.map', function () {
+             context.background().updateImagery();
+             immediateRedraw();
+           });
+           selection.on('wheel.map mousewheel.map', function (d3_event) {
+             // disable swipe-to-navigate browser pages on trackpad/magic mouse – #5552
+             d3_event.preventDefault();
+           }).call(_zoomerPanner).call(_zoomerPanner.transform, projection.transform()).on('dblclick.zoom', null); // override d3-zoom dblclick handling

 
 

-           popover.show = function() {
-               _anchorSelection.each(show);
-           };
+           map.supersurface = supersurface = selection.append('div').attr('class', 'supersurface').call(utilSetTransform, 0, 0); // Need a wrapper div because Opera can't cope with an absolutely positioned
+           // SVG element: http://bl.ocks.org/jfirebaugh/6fbfbd922552bf776c16

 
 

-           popover.updateContent = function() {
-               _anchorSelection.each(updateContent);
-           };
+           wrapper = supersurface.append('div').attr('class', 'layer layer-data');
+           map.surface = surface = wrapper.call(drawLayers).selectAll('.surface');
+           surface.call(drawLabels.observe).call(_doubleUpHandler).on(_pointerPrefix + 'down.zoom', function (d3_event) {
+             _lastPointerEvent = d3_event;

 
 

-           popover.hide = function() {
-               _anchorSelection.each(hide);
-           };
+             if (d3_event.button === 2) {
+               d3_event.stopPropagation();
+             }
+           }, true).on(_pointerPrefix + 'up.zoom', function (d3_event) {
+             _lastPointerEvent = d3_event;

 
 

-           popover.toggle = function() {
-               _anchorSelection.each(toggle);
-           };
+             if (resetTransform()) {
+               immediateRedraw();
+             }
+           }).on(_pointerPrefix + 'move.map', function (d3_event) {
+             _lastPointerEvent = d3_event;
+           }).on(_pointerPrefix + 'over.vertices', function (d3_event) {
+             if (map.editableDataEnabled() && !_isTransformed) {
+               var hover = d3_event.target.__data__;
+               surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
+               dispatch.call('drawn', this, {
+                 full: false
+               });
+             }
+           }).on(_pointerPrefix + 'out.vertices', function (d3_event) {
+             if (map.editableDataEnabled() && !_isTransformed) {
+               var hover = d3_event.relatedTarget && d3_event.relatedTarget.__data__;
+               surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
+               dispatch.call('drawn', this, {
+                 full: false
+               });
+             }
+           });
+           var detected = utilDetect(); // only WebKit supports gesture events
+
+           if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
+           // but we only need to do this on desktop Safari anyway. – #7694
+           !detected.isMobileWebKit) {
+             // Desktop Safari sends gesture events for multitouch trackpad pinches.
+             // We can listen for these and translate them into map zooms.
+             surface.on('gesturestart.surface', function (d3_event) {
+               d3_event.preventDefault();
+               _gestureTransformStart = projection.transform();
+             }).on('gesturechange.surface', gestureChange);
+           } // must call after surface init
+
+
+           updateAreaFill();
+
+           _doubleUpHandler.on('doubleUp.map', function (d3_event, p0) {
+             if (!_dblClickZoomEnabled) return; // don't zoom if targeting something other than the map itself
+
+             if (_typeof(d3_event.target.__data__) === 'object' && // or area fills
+             !select(d3_event.target).classed('fill')) return;
+             var zoomOut = d3_event.shiftKey;
+             var t = projection.transform();
+             var p1 = t.invert(p0);
+             t = t.scale(zoomOut ? 0.5 : 2);
+             t.x = p0[0] - p1[0] * t.k;
+             t.y = p0[1] - p1[1] * t.k;
+             map.transformEase(t);
+           });

 
 

-           popover.destroy = function(selection, selector) {
-               // by default, just destroy the current popover
-               selector = selector || '.popover-' + _id;
-
-               selection
-                   .on(_pointerPrefix + 'enter.popover', null)
-                   .on(_pointerPrefix + 'leave.popover', null)
-                   .on(_pointerPrefix + 'up.popover', null)
-                   .on(_pointerPrefix + 'down.popover', null)
-                   .on('click.popover', null)
-                   .attr('title', function() {
-                       return this.getAttribute('data-original-title') || this.getAttribute('title');
-                   })
-                   .attr('data-original-title', null)
-                   .selectAll(selector)
-                   .remove();
-           };
+           context.on('enter.map', function () {
+             if (!map.editableDataEnabled(true
+             /* skip zoom check */
+             )) return;
+             if (_isTransformed) return; // redraw immediately any objects affected by a change in selectedIDs.

 
 

+             var graph = context.graph();
+             var selectedAndParents = {};
+             context.selectedIDs().forEach(function (id) {
+               var entity = graph.hasEntity(id);

 
 

-           popover.destroyAny = function(selection) {
-               selection.call(popover.destroy, '.popover');
-           };
+               if (entity) {
+                 selectedAndParents[entity.id] = entity;

 
 

-           function setup() {
-               var anchor = select(this);
-               var animate = _animation.apply(this, arguments);
-               var popoverSelection = anchor.selectAll('.popover-' + _id)
-                   .data([0]);
+                 if (entity.type === 'node') {
+                   graph.parentWays(entity).forEach(function (parent) {
+                     selectedAndParents[parent.id] = parent;
+                   });
+                 }
+               }
+             });
+             var data = Object.values(selectedAndParents);

 
 

+             var filter = function filter(d) {
+               return d.id in selectedAndParents;
+             };

 
 

-               var enter = popoverSelection.enter()
-                   .append('div')
-                   .attr('class', 'popover popover-' + _id + ' ' + (klass ? klass : ''))
-                   .classed('arrowed', _hasArrow.apply(this, arguments));
+             data = context.features().filter(data, graph);
+             surface.call(drawVertices.drawSelected, graph, map.extent()).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent());
+             dispatch.call('drawn', this, {
+               full: false
+             }); // redraw everything else later

 
 

-               enter
-                   .append('div')
-                   .attr('class', 'popover-arrow');
+             scheduleRedraw();
+           });
+           map.dimensions(utilGetDimensions(selection));
+         }

 
 

-               enter
-                   .append('div')
-                   .attr('class', 'popover-inner');
+         function zoomEventFilter(d3_event) {
+           // Fix for #2151, (see also d3/d3-zoom#60, d3/d3-brush#18)
+           // Intercept `mousedown` and check if there is an orphaned zoom gesture.
+           // This can happen if a previous `mousedown` occurred without a `mouseup`.
+           // If we detect this, dispatch `mouseup` to complete the orphaned gesture,
+           // so that d3-zoom won't stop propagation of new `mousedown` events.
+           if (d3_event.type === 'mousedown') {
+             var hasOrphan = false;
+             var listeners = window.__on;

 
 

-               popoverSelection = enter
-                   .merge(popoverSelection);
+             for (var i = 0; i < listeners.length; i++) {
+               var listener = listeners[i];

 
 

-               if (animate) {
-                   popoverSelection.classed('fade', true);
+               if (listener.name === 'zoom' && listener.type === 'mouseup') {
+                 hasOrphan = true;
+                 break;

                }
                }

+             }

 
 

-               var display = _displayType.apply(this, arguments);
-
-               if (display === 'hover') {
-                   var _lastNonMouseEnterTime;
-                   anchor.on(_pointerPrefix + 'enter.popover', function() {
+             if (hasOrphan) {
+               var event = window.CustomEvent;

 
 

-                       if (event.pointerType) {
-                           if (event.pointerType !== 'mouse') {
-                               _lastNonMouseEnterTime = event.timeStamp;
-                               // only allow hover behavior for mouse input
-                               return;
-                           } else if (_lastNonMouseEnterTime &&
-                               event.timeStamp - _lastNonMouseEnterTime < 1500) {
-                               // HACK: iOS 13.4 sends an erroneous `mouse` type pointerenter
-                               // event for non-mouse interactions right after sending
-                               // the correct type pointerenter event. Workaround by discarding
-                               // any mouse event that occurs immediately after a non-mouse event.
-                               return;
-                           }
-                       }
+               if (event) {
+                 event = new event('mouseup');
+               } else {
+                 event = window.document.createEvent('Event');
+                 event.initEvent('mouseup', false, false);
+               } // Event needs to be dispatched with an event.view property.

 
 

-                       // don't show if buttons are pressed, e.g. during click and drag of map
-                       if (event.buttons !== 0) { return; }

 
 

-                       show.apply(this, arguments);
-                   });
-                   anchor.on(_pointerPrefix + 'leave.popover', function() {
-                       hide.apply(this, arguments);
-                   });
+               event.view = window;
+               window.dispatchEvent(event);
+             }
+           }

 
 

-               } else if (display === 'clickFocus') {
-                   anchor
-                       .on(_pointerPrefix + 'down.popover', function() {
-                           event.preventDefault();
-                           event.stopPropagation();
-                       })
-                       .on(_pointerPrefix + 'up.popover', function() {
-                           event.preventDefault();
-                           event.stopPropagation();
-                       })
-                       .on('click.popover', toggle);
+           return d3_event.button !== 2; // ignore right clicks
+         }

 
 

-                   popoverSelection
-                       .attr('tabindex', 0)
-                       .on('blur.popover', function() {
-                           anchor.each(function() {
-                               hide.apply(this, arguments);
-                           });
-                       });
-               }
-           }
+         function pxCenter() {
+           return [_dimensions[0] / 2, _dimensions[1] / 2];
+         }

 
 

+         function drawEditable(difference, extent) {
+           var mode = context.mode();
+           var graph = context.graph();
+           var features = context.features();
+           var all = context.history().intersects(map.extent());
+           var fullRedraw = false;
+           var data;
+           var set;
+           var filter;
+           var applyFeatureLayerFilters = true;
+
+           if (map.isInWideSelection()) {
+             data = [];
+             utilEntityAndDeepMemberIDs(mode.selectedIDs(), context.graph()).forEach(function (id) {
+               var entity = context.hasEntity(id);
+               if (entity) data.push(entity);
+             });
+             fullRedraw = true;
+             filter = utilFunctor(true); // selected features should always be visible, so we can skip filtering

 
 

-           function show() {
-               var anchor = select(this);
-               var popoverSelection = anchor.selectAll('.popover-' + _id);
+             applyFeatureLayerFilters = false;
+           } else if (difference) {
+             var complete = difference.complete(map.extent());
+             data = Object.values(complete).filter(Boolean);
+             set = new Set(Object.keys(complete));

 
 

-               if (popoverSelection.empty()) {
-                   // popover was removed somehow, put it back
-                   anchor.call(popover.destroy);
-                   anchor.each(setup);
-                   popoverSelection = anchor.selectAll('.popover-' + _id);
-               }
+             filter = function filter(d) {
+               return set.has(d.id);
+             };

 
 

-               popoverSelection.classed('in', true);
+             features.clear(data);
+           } else {
+             // force a full redraw if gatherStats detects that a feature
+             // should be auto-hidden (e.g. points or buildings)..
+             if (features.gatherStats(all, graph, _dimensions)) {
+               extent = undefined;
+             }

 
 

-               var displayType = _displayType.apply(this, arguments);
-               if (displayType === 'clickFocus') {
-                   anchor.classed('active', true);
-                   popoverSelection.node().focus();
-               }
+             if (extent) {
+               data = context.history().intersects(map.extent().intersection(extent));
+               set = new Set(data.map(function (entity) {
+                 return entity.id;
+               }));

 
 

-               anchor.each(updateContent);
+               filter = function filter(d) {
+                 return set.has(d.id);
+               };
+             } else {
+               data = all;
+               fullRedraw = true;
+               filter = utilFunctor(true);
+             }

            }
 
            }
 

-           function updateContent() {
-               var anchor = select(this);
-
-               if (_content) {
-                   anchor.selectAll('.popover-' + _id + ' > .popover-inner')
-                       .call(_content.apply(this, arguments));
-               }
+           if (applyFeatureLayerFilters) {
+             data = features.filter(data, graph);
+           } else {
+             context.features().resetStats();
+           }

 
 

-               updatePosition.apply(this, arguments);
-               // hack: update multiple times to fix instances where the absolute offset is
-               // set before the dynamic popover size is calculated by the browser
-               updatePosition.apply(this, arguments);
-               updatePosition.apply(this, arguments);
+           if (mode && mode.id === 'select') {
+             // update selected vertices - the user might have just double-clicked a way,
+             // creating a new vertex, triggering a partial redraw without a mode change
+             surface.call(drawVertices.drawSelected, graph, map.extent());

            }
 
            }
 

+           surface.call(drawVertices, graph, data, filter, map.extent(), fullRedraw).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent()).call(drawLabels, graph, data, filter, _dimensions, fullRedraw).call(drawPoints, graph, data, filter);
+           dispatch.call('drawn', this, {
+             full: true
+           });
+         }

 
 

-           function updatePosition() {
+         map.init = function () {
+           drawLayers = svgLayers(projection, context);
+           drawPoints = svgPoints(projection, context);
+           drawVertices = svgVertices(projection, context);
+           drawLines = svgLines(projection, context);
+           drawAreas = svgAreas(projection, context);
+           drawMidpoints = svgMidpoints(projection, context);
+           drawLabels = svgLabels(projection, context);
+         };

 
 

-               var anchor = select(this);
-               var popoverSelection = anchor.selectAll('.popover-' + _id);
+         function editOff() {
+           context.features().resetStats();
+           surface.selectAll('.layer-osm *').remove();
+           surface.selectAll('.layer-touch:not(.markers) *').remove();
+           var allowed = {
+             'browse': true,
+             'save': true,
+             'select-note': true,
+             'select-data': true,
+             'select-error': true
+           };
+           var mode = context.mode();

 
 

-               var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
-               var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
-               var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
-               var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
+           if (mode && !allowed[mode.id]) {
+             context.enter(modeBrowse(context));
+           }

 
 

-               var placement = _placement.apply(this, arguments);
-               popoverSelection
-                   .classed('left', false)
-                   .classed('right', false)
-                   .classed('top', false)
-                   .classed('bottom', false)
-                   .classed(placement, true);
+           dispatch.call('drawn', this, {
+             full: true
+           });
+         }

 
 

-               var alignment = _alignment.apply(this, arguments);
-               var alignFactor = 0.5;
-               if (alignment === 'leading') {
-                   alignFactor = 0;
-               } else if (alignment === 'trailing') {
-                   alignFactor = 1;
+         function gestureChange(d3_event) {
+           // Remap Safari gesture events to wheel events - #5492
+           // We want these disabled most places, but enabled for zoom/unzoom on map surface
+           // https://developer.mozilla.org/en-US/docs/Web/API/GestureEvent
+           var e = d3_event;
+           e.preventDefault();
+           var props = {
+             deltaMode: 0,
+             // dummy values to ignore in zoomPan
+             deltaY: 1,
+             // dummy values to ignore in zoomPan
+             clientX: e.clientX,
+             clientY: e.clientY,
+             screenX: e.screenX,
+             screenY: e.screenY,
+             x: e.x,
+             y: e.y
+           };
+           var e2 = new WheelEvent('wheel', props);
+           e2._scale = e.scale; // preserve the original scale
+
+           e2._rotation = e.rotation; // preserve the original rotation
+
+           _selection.node().dispatchEvent(e2);
+         }
+
+         function zoomPan(event, key, transform) {
+           var source = event && event.sourceEvent || event;
+           var eventTransform = transform || event && event.transform;
+           var x = eventTransform.x;
+           var y = eventTransform.y;
+           var k = eventTransform.k; // Special handling of 'wheel' events:
+           // They might be triggered by the user scrolling the mouse wheel,
+           // or 2-finger pinch/zoom gestures, the transform may need adjustment.
+
+           if (source && source.type === 'wheel') {
+             // assume that the gesture is already handled by pointer events
+             if (_pointerDown) return;
+             var detected = utilDetect();
+             var dX = source.deltaX;
+             var dY = source.deltaY;
+             var x2 = x;
+             var y2 = y;
+             var k2 = k;
+             var t0, p0, p1; // Normalize mousewheel scroll speed (Firefox) - #3029
+             // If wheel delta is provided in LINE units, recalculate it in PIXEL units
+             // We are essentially redoing the calculations that occur here:
+             //   https://github.com/d3/d3-zoom/blob/78563a8348aa4133b07cac92e2595c2227ca7cd7/src/zoom.js#L203
+             // See this for more info:
+             //   https://github.com/basilfx/normalize-wheel/blob/master/src/normalizeWheel.js
+
+             if (source.deltaMode === 1
+             /* LINE */
+             ) {
+                 // Convert from lines to pixels, more if the user is scrolling fast.
+                 // (I made up the exp function to roughly match Firefox to what Chrome does)
+                 // These numbers should be floats, because integers are treated as pan gesture below.
+                 var lines = Math.abs(source.deltaY);
+                 var sign = source.deltaY > 0 ? 1 : -1;
+                 dY = sign * clamp$1(Math.exp((lines - 1) * 0.75) * 4.000244140625, 4.000244140625, // min
+                 350.000244140625 // max
+                 ); // On Firefox Windows and Linux we always get +/- the scroll line amount (default 3)
+                 // There doesn't seem to be any scroll acceleration.
+                 // This multiplier increases the speed a little bit - #5512
+
+                 if (detected.os !== 'mac') {
+                   dY *= 5;
+                 } // recalculate x2,y2,k2
+
+
+                 t0 = _isTransformed ? _transformLast : _transformStart;
+                 p0 = _getMouseCoords(source);
+                 p1 = t0.invert(p0);
+                 k2 = t0.k * Math.pow(2, -dY / 500);
+                 k2 = clamp$1(k2, kMin, kMax);
+                 x2 = p0[0] - p1[0] * k2;
+                 y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (Safari) - #5492
+                 // These are fake `wheel` events we made from Safari `gesturechange` events..
+               } else if (source._scale) {
+               // recalculate x2,y2,k2
+               t0 = _gestureTransformStart;
+               p0 = _getMouseCoords(source);
+               p1 = t0.invert(p0);
+               k2 = t0.k * source._scale;
+               k2 = clamp$1(k2, kMin, kMax);
+               x2 = p0[0] - p1[0] * k2;
+               y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (all browsers except Safari) - #5492
+               // Pinch zooming via the `wheel` event will always have:
+               // - `ctrlKey = true`
+               // - `deltaY` is not round integer pixels (ignore `deltaX`)
+             } else if (source.ctrlKey && !isInteger(dY)) {
+               dY *= 6; // slightly scale up whatever the browser gave us
+               // recalculate x2,y2,k2
+
+               t0 = _isTransformed ? _transformLast : _transformStart;
+               p0 = _getMouseCoords(source);
+               p1 = t0.invert(p0);
+               k2 = t0.k * Math.pow(2, -dY / 500);
+               k2 = clamp$1(k2, kMin, kMax);
+               x2 = p0[0] - p1[0] * k2;
+               y2 = p0[1] - p1[1] * k2; // Trackpad scroll zooming with shift or alt/option key down
+             } else if ((source.altKey || source.shiftKey) && isInteger(dY)) {
+               // recalculate x2,y2,k2
+               t0 = _isTransformed ? _transformLast : _transformStart;
+               p0 = _getMouseCoords(source);
+               p1 = t0.invert(p0);
+               k2 = t0.k * Math.pow(2, -dY / 500);
+               k2 = clamp$1(k2, kMin, kMax);
+               x2 = p0[0] - p1[0] * k2;
+               y2 = p0[1] - p1[1] * k2; // 2 finger map panning (Mac only, all browsers except Firefox #8595) - #5492, #5512
+               // Panning via the `wheel` event will always have:
+               // - `ctrlKey = false`
+               // - `deltaX`,`deltaY` are round integer pixels
+             } else if (detected.os === 'mac' && detected.browser !== 'Firefox' && !source.ctrlKey && isInteger(dX) && isInteger(dY)) {
+               p1 = projection.translate();
+               x2 = p1[0] - dX;
+               y2 = p1[1] - dY;
+               k2 = projection.scale();
+               k2 = clamp$1(k2, kMin, kMax);
+             } // something changed - replace the event transform
+
+
+             if (x2 !== x || y2 !== y || k2 !== k) {
+               x = x2;
+               y = y2;
+               k = k2;
+               eventTransform = identity$2.translate(x2, y2).scale(k2);
+
+               if (_zoomerPanner._transform) {
+                 // utilZoomPan interface
+                 _zoomerPanner._transform(eventTransform);
+               } else {
+                 // d3_zoom interface
+                 _selection.node().__zoom = eventTransform;

                }
                }

-               var anchorFrame = getFrame(anchor.node());
-               var popoverFrame = getFrame(popoverSelection.node());
-               var position;
+             }
+           }

 
 

-               switch (placement) {
-                   case 'top':
-                   position = {
-                       x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-                       y: anchorFrame.y - popoverFrame.h
-                   };
-                   break;
-                   case 'bottom':
-                   position = {
-                       x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-                       y: anchorFrame.y + anchorFrame.h
-                   };
-                   break;
-                   case 'left':
-                   position = {
-                       x: anchorFrame.x - popoverFrame.w,
-                       y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-                   };
-                   break;
-                   case 'right':
-                   position = {
-                       x: anchorFrame.x + anchorFrame.w,
-                       y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-                   };
-                   break;
-               }
+           if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
+             return; // no change
+           }

 
 

-               if (position) {
+           if (geoScaleToZoom(k, TILESIZE) < _minzoom) {
+             surface.interrupt();
+             dispatch.call('hitMinZoom', this, map);
+             setCenterZoom(map.center(), context.minEditableZoom(), 0, true);
+             scheduleRedraw();
+             dispatch.call('move', this, map);
+             return;
+           }

 
 

-                   if (scrollNode && (placement === 'top' || placement === 'bottom')) {
+           projection.transform(eventTransform);
+           var withinEditableZoom = map.withinEditableZoom();

 
 

-                       var initialPosX = position.x;
+           if (_lastWithinEditableZoom !== withinEditableZoom) {
+             if (_lastWithinEditableZoom !== undefined) {
+               // notify that the map zoomed in or out over the editable zoom threshold
+               dispatch.call('crossEditableZoom', this, withinEditableZoom);
+             }

 
 

-                       if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
-                           position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
-                       } else if (position.x < 10) {
-                           position.x = 10;
-                       }
+             _lastWithinEditableZoom = withinEditableZoom;
+           }

 
 

-                       var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow');
-                       // keep the arrow centered on the button, or as close as possible
-                       var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
-                       arrow.style('left', ~~arrowPosX + 'px');
-                   }
+           var scale = k / _transformStart.k;
+           var tX = (x / scale - _transformStart.x) * scale;
+           var tY = (y / scale - _transformStart.y) * scale;

 
 

-                   popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
-               } else {
-                   popoverSelection.style('left', null).style('top', null);
-               }
+           if (context.inIntro()) {
+             curtainProjection.transform({
+               x: x - tX,
+               y: y - tY,
+               k: k
+             });
+           }

 
 

-               function getFrame(node) {
-                   var positionStyle = select(node).style('position');
-                   if (positionStyle === 'absolute' || positionStyle === 'static') {
-                       return {
-                           x: node.offsetLeft - scrollLeft,
-                           y: node.offsetTop - scrollTop,
-                           w: node.offsetWidth,
-                           h: node.offsetHeight
-                       };
-                   } else {
-                       return {
-                           x: 0,
-                           y: 0,
-                           w: node.offsetWidth,
-                           h: node.offsetHeight
-                       };
-                   }
-               }
+           if (source) {
+             _lastPointerEvent = event;

            }
 
            }
 

+           _isTransformed = true;
+           _transformLast = eventTransform;
+           utilSetTransform(supersurface, tX, tY, scale);
+           scheduleRedraw();
+           dispatch.call('move', this, map);

 
 

-           function hide() {
-               var anchor = select(this);
-               if (_displayType.apply(this, arguments) === 'clickFocus') {
-                   anchor.classed('active', false);
-               }
-               anchor.selectAll('.popover-' + _id).classed('in', false);
+           function isInteger(val) {
+             return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;

            }
            }

+         }

 
 

+         function resetTransform() {
+           if (!_isTransformed) return false;
+           utilSetTransform(supersurface, 0, 0);
+           _isTransformed = false;

 
 

-           function toggle() {
-               if (select(this).select('.popover-' + _id).classed('in')) {
-                   hide.apply(this, arguments);
-               } else {
-                   show.apply(this, arguments);
-               }
+           if (context.inIntro()) {
+             curtainProjection.transform(projection.transform());

            }
 
            }
 

+           return true;
+         }

 
 

-           return popover;
-       }
+         function redraw(difference, extent) {
+           if (surface.empty() || !_redrawEnabled) return; // If we are in the middle of a zoom/pan, we can't do differenced redraws.
+           // It would result in artifacts where differenced entities are redrawn with
+           // one transform and unchanged entities with another.

 
 

-       function uiTooltip(klass) {
+           if (resetTransform()) {
+             difference = extent = undefined;
+           }

 
 

-           var tooltip = uiPopover((klass || '') + ' tooltip')
-               .displayType('hover');
+           var zoom = map.zoom();
+           var z = String(~~zoom);

 
 

-           var _title = function() {
-               var title = this.getAttribute('data-original-title');
-               if (title) {
-                   return title;
-               } else {
-                   title = this.getAttribute('title');
-                   this.removeAttribute('title');
-                   this.setAttribute('data-original-title', title);
-               }
-               return title;
-           };
+           if (surface.attr('data-zoom') !== z) {
+             surface.attr('data-zoom', z);
+           } // class surface as `lowzoom` around z17-z18.5 (based on latitude)

 
 

-           var _heading = utilFunctor(null);
-           var _keys = utilFunctor(null);

 
 

-           tooltip.title = function(val) {
-               if (!arguments.length) { return _title; }
-               _title = utilFunctor(val);
-               return tooltip;
-           };
+           var lat = map.center()[1];
+           var lowzoom = linear().domain([-60, 0, 60]).range([17, 18.5, 17]).clamp(true);
+           surface.classed('low-zoom', zoom <= lowzoom(lat));

 
 

-           tooltip.heading = function(val) {
-               if (!arguments.length) { return _heading; }
-               _heading = utilFunctor(val);
-               return tooltip;
-           };
+           if (!difference) {
+             supersurface.call(context.background());
+             wrapper.call(drawLayers);
+           } // OSM

 
 

-           tooltip.keys = function(val) {
-               if (!arguments.length) { return _keys; }
-               _keys = utilFunctor(val);
-               return tooltip;
-           };

 
 

-           tooltip.content(function() {
-               var heading = _heading.apply(this, arguments);
-               var text = _title.apply(this, arguments);
-               var keys = _keys.apply(this, arguments);
+           if (map.editableDataEnabled() || map.isInWideSelection()) {
+             context.loadTiles(projection);
+             drawEditable(difference, extent);
+           } else {
+             editOff();
+           }

 
 

-               return function(selection) {
+           _transformStart = projection.transform();
+           return map;
+         }

 
 

-                   var headingSelect = selection
-                       .selectAll('.tooltip-heading')
-                       .data(heading ? [heading] :[]);
+         var immediateRedraw = function immediateRedraw(difference, extent) {
+           if (!difference && !extent) cancelPendingRedraw();
+           redraw(difference, extent);
+         };

 
 

-                   headingSelect.exit()
-                       .remove();
+         map.lastPointerEvent = function () {
+           return _lastPointerEvent;
+         };

 
 

-                   headingSelect.enter()
-                       .append('div')
-                       .attr('class', 'tooltip-heading')
-                       .merge(headingSelect)
-                       .html(heading);
+         map.mouse = function (d3_event) {
+           var event = d3_event || _lastPointerEvent;

 
 

-                   var textSelect = selection
-                       .selectAll('.tooltip-text')
-                       .data(text ? [text] :[]);
+           if (event) {
+             var s;

 
 

-                   textSelect.exit()
-                       .remove();
+             while (s = event.sourceEvent) {
+               event = s;
+             }

 
 

-                   textSelect.enter()
-                       .append('div')
-                       .attr('class', 'tooltip-text')
-                       .merge(textSelect)
-                       .html(text);
+             return _getMouseCoords(event);
+           }

 
 

-                   var keyhintWrap = selection
-                       .selectAll('.keyhint-wrap')
-                       .data(keys && keys.length ? [0] : []);
+           return null;
+         }; // returns Lng/Lat

 
 

-                   keyhintWrap.exit()
-                       .remove();

 
 

-                   var keyhintWrapEnter = keyhintWrap.enter()
-                       .append('div')
-                       .attr('class', 'keyhint-wrap');
+         map.mouseCoordinates = function () {
+           var coord = map.mouse() || pxCenter();
+           return projection.invert(coord);
+         };

 
 

-                   keyhintWrapEnter
-                       .append('span')
-                       .html(_t('tooltip_keyhint'));
+         map.dblclickZoomEnable = function (val) {
+           if (!arguments.length) return _dblClickZoomEnabled;
+           _dblClickZoomEnabled = val;
+           return map;
+         };

 
 

-                   keyhintWrap = keyhintWrapEnter.merge(keyhintWrap);
+         map.redrawEnable = function (val) {
+           if (!arguments.length) return _redrawEnabled;
+           _redrawEnabled = val;
+           return map;
+         };

 
 

-                   keyhintWrap.selectAll('kbd.shortcut')
-                       .data(keys && keys.length ? keys : [])
-                       .enter()
-                       .append('kbd')
-                       .attr('class', 'shortcut')
-                       .html(function(d) {
-                           return d;
-                       });
-               };
-           });
+         map.isTransformed = function () {
+           return _isTransformed;
+         };

 
 

-           return tooltip;
-       }
+         function setTransform(t2, duration, force) {
+           var t = projection.transform();
+           if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) return false;

 
 

-       function uiEditMenu(context) {
-           var dispatch$1 = dispatch('toggled');
+           if (duration) {
+             _selection.transition().duration(duration).on('start', function () {
+               map.startEase();
+             }).call(_zoomerPanner.transform, identity$2.translate(t2.x, t2.y).scale(t2.k));
+           } else {
+             projection.transform(t2);
+             _transformStart = t2;

 
 

-           var _menu = select(null);
-           var _operations = [];
-           // the position the menu should be displayed relative to
-           var _anchorLoc = [0, 0];
-           var _anchorLocLonLat = [0, 0];
-           // a string indicating how the menu was opened
-           var _triggerType = '';
+             _selection.call(_zoomerPanner.transform, _transformStart);
+           }

 
 

-           var _vpTopMargin = 85; // viewport top margin
-           var _vpBottomMargin = 45; // viewport bottom margin
-           var _vpSideMargin = 35;   // viewport side margin
+           return true;
+         }

 
 

-           var _menuTop = false;
-           var _menuHeight;
-           var _menuWidth;
+         function setCenterZoom(loc2, z2, duration, force) {
+           var c = map.center();
+           var z = map.zoom();
+           if (loc2[0] === c[0] && loc2[1] === c[1] && z2 === z && !force) return false;
+           var proj = geoRawMercator().transform(projection.transform()); // copy projection
+
+           var k2 = clamp$1(geoZoomToScale(z2, TILESIZE), kMin, kMax);
+           proj.scale(k2);
+           var t = proj.translate();
+           var point = proj(loc2);
+           var center = pxCenter();
+           t[0] += center[0] - point[0];
+           t[1] += center[1] - point[1];
+           return setTransform(identity$2.translate(t[0], t[1]).scale(k2), duration, force);
+         }
+
+         map.pan = function (delta, duration) {
+           var t = projection.translate();
+           var k = projection.scale();
+           t[0] += delta[0];
+           t[1] += delta[1];
+
+           if (duration) {
+             _selection.transition().duration(duration).on('start', function () {
+               map.startEase();
+             }).call(_zoomerPanner.transform, identity$2.translate(t[0], t[1]).scale(k));
+           } else {
+             projection.translate(t);
+             _transformStart = projection.transform();

 
 

-           // hardcode these values to make menu positioning easier
-           var _verticalPadding = 4;
+             _selection.call(_zoomerPanner.transform, _transformStart);

 
 

-           // see also `.edit-menu .tooltip` CSS; include margin
-           var _tooltipWidth = 210;
+             dispatch.call('move', this, map);
+             immediateRedraw();
+           }

 
 

-           // offset the menu slightly from the target location
-           var _menuSideMargin = 10;
+           return map;
+         };

 
 

-           var _tooltips = [];
+         map.dimensions = function (val) {
+           if (!arguments.length) return _dimensions;
+           _dimensions = val;
+           drawLayers.dimensions(_dimensions);
+           context.background().dimensions(_dimensions);
+           projection.clipExtent([[0, 0], _dimensions]);
+           _getMouseCoords = utilFastMouse(supersurface.node());
+           scheduleRedraw();
+           return map;
+         };

 
 

-           var editMenu = function(selection) {
+         function zoomIn(delta) {
+           setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
+         }

 
 

-               var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
+         function zoomOut(delta) {
+           setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
+         }

 
 

-               var ops = _operations.filter(function(op) {
-                   return !isTouchMenu || !op.mouseOnly;
-               });
+         map.zoomIn = function () {
+           zoomIn(1);
+         };

 
 

-               if (!ops.length) { return; }
+         map.zoomInFurther = function () {
+           zoomIn(4);
+         };

 
 

-               _tooltips = [];
+         map.canZoomIn = function () {
+           return map.zoom() < maxZoom;
+         };

 
 

-               // Position the menu above the anchor for stylus and finger input
-               // since the mapper's hand likely obscures the screen below the anchor
-               _menuTop = isTouchMenu;
+         map.zoomOut = function () {
+           zoomOut(1);
+         };

 
 

-               // Show labels for touch input since there aren't hover tooltips
-               var showLabels = isTouchMenu;
+         map.zoomOutFurther = function () {
+           zoomOut(4);
+         };

 
 

-               var buttonHeight = showLabels ? 32 : 34;
-               if (showLabels) {
-                   // Get a general idea of the width based on the length of the label
-                   _menuWidth = 52 + Math.min(120, 6 * Math.max.apply(Math, ops.map(function(op) {
-                       return op.title.length;
-                   })));
-               } else {
-                   _menuWidth = 44;
-               }
+         map.canZoomOut = function () {
+           return map.zoom() > minZoom;
+         };

 
 

-               _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
+         map.center = function (loc2) {
+           if (!arguments.length) {
+             return projection.invert(pxCenter());
+           }

 
 

-               _menu = selection
-                   .append('div')
-                   .attr('class', 'edit-menu')
-                   .classed('touch-menu', isTouchMenu)
-                   .style('padding', _verticalPadding + 'px 0');
-
-               var buttons = _menu.selectAll('.edit-menu-item')
-                   .data(ops);
-
-               // enter
-               var buttonsEnter = buttons.enter()
-                   .append('button')
-                   .attr('class', function (d) { return 'edit-menu-item edit-menu-item-' + d.id; })
-                   .style('height', buttonHeight + 'px')
-                   .on('click', click)
-                   // don't listen for `mouseup` because we only care about non-mouse pointer types
-                   .on('pointerup', pointerup)
-                   .on('pointerdown mousedown', function pointerdown() {
-                       // don't let button presses also act as map input - #1869
-                       event.stopPropagation();
-                   });
+           if (setCenterZoom(loc2, map.zoom())) {
+             dispatch.call('move', this, map);
+           }

 
 

-               buttonsEnter.each(function(d) {
-                   var tooltip = uiTooltip()
-                       .heading(d.title)
-                       .title(d.tooltip())
-                       .keys([d.keys[0]]);
+           scheduleRedraw();
+           return map;
+         };

 
 

-                   _tooltips.push(tooltip);
+         map.unobscuredCenterZoomEase = function (loc, zoom) {
+           var offset = map.unobscuredOffsetPx();
+           var proj = geoRawMercator().transform(projection.transform()); // copy projection
+           // use the target zoom to calculate the offset center

 
 

-                   select(this)
-                       .call(tooltip)
-                       .append('div')
-                       .attr('class', 'icon-wrap')
-                       .call(svgIcon('#iD-operation-' + d.id, 'operation'));
-               });
+           proj.scale(geoZoomToScale(zoom, TILESIZE));
+           var locPx = proj(loc);
+           var offsetLocPx = [locPx[0] + offset[0], locPx[1] + offset[1]];
+           var offsetLoc = proj.invert(offsetLocPx);
+           map.centerZoomEase(offsetLoc, zoom);
+         };

 
 

-               if (showLabels) {
-                   buttonsEnter.append('span')
-                       .attr('class', 'label')
-                       .text(function(d) {
-                           return d.title;
-                       });
-               }
+         map.unobscuredOffsetPx = function () {
+           var openPane = context.container().select('.map-panes .map-pane.shown');

 
 

-               // update
-               buttons = buttonsEnter
-                   .merge(buttons)
-                   .classed('disabled', function(d) { return d.disabled(); });
+           if (!openPane.empty()) {
+             return [openPane.node().offsetWidth / 2, 0];
+           }

 
 

-               updatePosition();
+           return [0, 0];
+         };

 
 

-               var initialScale = context.projection.scale();
-               context.map()
-                   .on('move.edit-menu', function() {
-                       if (initialScale !== context.projection.scale()) {
-                           editMenu.close();
-                       }
-                   })
-                   .on('drawn.edit-menu', function(info) {
-                       if (info.full) { updatePosition(); }
-                   });
+         map.zoom = function (z2) {
+           if (!arguments.length) {
+             return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
+           }

 
 

-               var lastPointerUpType;
-               // `pointerup` is always called before `click`
-               function pointerup() {
-                   lastPointerUpType = event.pointerType;
-               }
-
-               function click(operation) {
-                   event.stopPropagation();
-                   if (operation.disabled()) {
-                       if (lastPointerUpType === 'touch' ||
-                           lastPointerUpType === 'pen') {
-                           // there are no tooltips for touch interactions so flash feedback instead
-                           context.ui().flash
-                               .duration(4000)
-                               .iconName('#iD-operation-' + operation.id)
-                               .iconClass('operation disabled')
-                               .text(operation.tooltip)();
-                       }
-                   } else {
-                       if (lastPointerUpType === 'touch' ||
-                           lastPointerUpType === 'pen') {
-                           context.ui().flash
-                               .duration(2000)
-                               .iconName('#iD-operation-' + operation.id)
-                               .iconClass('operation')
-                               .text(operation.annotation() || operation.title)();
-                       }
+           if (z2 < _minzoom) {
+             surface.interrupt();
+             dispatch.call('hitMinZoom', this, map);
+             z2 = context.minEditableZoom();
+           }

 
 

-                       operation();
-                       editMenu.close();
-                   }
-                   lastPointerUpType = null;
-               }
+           if (setCenterZoom(map.center(), z2)) {
+             dispatch.call('move', this, map);
+           }

 
 

-               dispatch$1.call('toggled', this, true);
-           };
+           scheduleRedraw();
+           return map;
+         };

 
 

-           function updatePosition() {
+         map.centerZoom = function (loc2, z2) {
+           if (setCenterZoom(loc2, z2)) {
+             dispatch.call('move', this, map);
+           }

 
 

-               if (!_menu || _menu.empty()) { return; }
+           scheduleRedraw();
+           return map;
+         };

 
 

-               var anchorLoc = context.projection(_anchorLocLonLat);
+         map.zoomTo = function (entity) {
+           var extent = entity.extent(context.graph());
+           if (!isFinite(extent.area())) return map;
+           var z2 = clamp$1(map.trimmedExtentZoom(extent), 0, 20);
+           return map.centerZoom(extent.center(), z2);
+         };

 
 

-               var viewport = context.surfaceRect();
+         map.centerEase = function (loc2, duration) {
+           duration = duration || 250;
+           setCenterZoom(loc2, map.zoom(), duration);
+           return map;
+         };

 
 

-               if (anchorLoc[0] < 0 ||
-                   anchorLoc[0] > viewport.width ||
-                   anchorLoc[1] < 0 ||
-                   anchorLoc[1] > viewport.height) {
-                   // close the menu if it's gone offscreen
+         map.zoomEase = function (z2, duration) {
+           duration = duration || 250;
+           setCenterZoom(map.center(), z2, duration, false);
+           return map;
+         };

 
 

-                   editMenu.close();
-                   return;
-               }
+         map.centerZoomEase = function (loc2, z2, duration) {
+           duration = duration || 250;
+           setCenterZoom(loc2, z2, duration, false);
+           return map;
+         };

 
 

-               var menuLeft = displayOnLeft(viewport);
+         map.transformEase = function (t2, duration) {
+           duration = duration || 250;
+           setTransform(t2, duration, false
+           /* don't force */
+           );
+           return map;
+         };

 
 

-               var offset = [0, 0];
+         map.zoomToEase = function (obj, duration) {
+           var extent;

 
 

-               offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
+           if (Array.isArray(obj)) {
+             obj.forEach(function (entity) {
+               var entityExtent = entity.extent(context.graph());

 
 

-               if (_menuTop) {
-                   if (anchorLoc[1] - _menuHeight < _vpTopMargin) {
-                       // menu is near top viewport edge, shift downward
-                       offset[1] = -anchorLoc[1] + _vpTopMargin;
-                   } else {
-                       offset[1] = -_menuHeight;
-                   }
+               if (!extent) {
+                 extent = entityExtent;

                } else {
                } else {

-                   if (anchorLoc[1] + _menuHeight > (viewport.height - _vpBottomMargin)) {
-                       // menu is near bottom viewport edge, shift upwards
-                       offset[1] = -anchorLoc[1] - _menuHeight + viewport.height - _vpBottomMargin;
-                   } else {
-                       offset[1] = 0;
-                   }
+                 extent = extent.extend(entityExtent);

                }
                }

+             });
+           } else {
+             extent = obj.extent(context.graph());
+           }

 
 

-               var origin = geoVecAdd(anchorLoc, offset);
-
-               _menu
-                   .style('left', origin[0] + 'px')
-                   .style('top', origin[1] + 'px');
-
-               var tooltipSide = tooltipPosition(viewport, menuLeft);
-               _tooltips.forEach(function(tooltip) {
-                   tooltip.placement(tooltipSide);
-               });
+           if (!isFinite(extent.area())) return map;
+           var z2 = clamp$1(map.trimmedExtentZoom(extent), 0, 20);
+           return map.centerZoomEase(extent.center(), z2, duration);
+         };

 
 

-               function displayOnLeft(viewport) {
-                   if (_mainLocalizer.textDirection() === 'ltr') {
-                       if ((anchorLoc[0] + _menuSideMargin + _menuWidth) > (viewport.width - _vpSideMargin)) {
-                           // right menu would be too close to the right viewport edge, go left
-                           return true;
-                       }
-                       // prefer right menu
-                       return false;
+         map.startEase = function () {
+           utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
+             map.cancelEase();
+           });
+           return map;
+         };

 
 

-                   } else { // rtl
-                       if ((anchorLoc[0] - _menuSideMargin - _menuWidth) < _vpSideMargin) {
-                           // left menu would be too close to the left viewport edge, go right
-                           return false;
-                       }
-                       // prefer left menu
-                       return true;
-                   }
-               }
+         map.cancelEase = function () {
+           _selection.interrupt();

 
 

-               function tooltipPosition(viewport, menuLeft) {
-                   if (_mainLocalizer.textDirection() === 'ltr') {
-                       if (menuLeft) {
-                           // if there's not room for a right-side menu then there definitely
-                           // isn't room for right-side tooltips
-                           return 'left';
-                       }
-                       if ((anchorLoc[0] + _menuSideMargin + _menuWidth + _tooltipWidth) > (viewport.width - _vpSideMargin)) {
-                           // right tooltips would be too close to the right viewport edge, go left
-                           return 'left';
-                       }
-                       // prefer right tooltips
-                       return 'right';
+           return map;
+         };

 
 

-                   } else { // rtl
-                       if (!menuLeft) {
-                           return 'right';
-                       }
-                       if ((anchorLoc[0] - _menuSideMargin - _menuWidth - _tooltipWidth) < _vpSideMargin) {
-                           // left tooltips would be too close to the left viewport edge, go right
-                           return 'right';
-                       }
-                       // prefer left tooltips
-                       return 'left';
-                   }
-               }
+         map.extent = function (val) {
+           if (!arguments.length) {
+             return new geoExtent(projection.invert([0, _dimensions[1]]), projection.invert([_dimensions[0], 0]));
+           } else {
+             var extent = geoExtent(val);
+             map.centerZoom(extent.center(), map.extentZoom(extent));

            }
            }

+         };

 
 

-           editMenu.close = function () {
+         map.trimmedExtent = function (val) {
+           if (!arguments.length) {
+             var headerY = 71;
+             var footerY = 30;
+             var pad = 10;
+             return new geoExtent(projection.invert([pad, _dimensions[1] - footerY - pad]), projection.invert([_dimensions[0] - pad, headerY + pad]));
+           } else {
+             var extent = geoExtent(val);
+             map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
+           }
+         };

 
 

-               context.map()
-                   .on('move.edit-menu', null)
-                   .on('drawn.edit-menu', null);
+         function calcExtentZoom(extent, dim) {
+           var tl = projection([extent[0][0], extent[1][1]]);
+           var br = projection([extent[1][0], extent[0][1]]); // Calculate maximum zoom that fits extent

 
 

-               _menu.remove();
-               _tooltips = [];
+           var hFactor = (br[0] - tl[0]) / dim[0];
+           var vFactor = (br[1] - tl[1]) / dim[1];
+           var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
+           var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
+           var newZoom = map.zoom() - Math.max(hZoomDiff, vZoomDiff);
+           return newZoom;
+         }

 
 

-               dispatch$1.call('toggled', this, false);
-           };
+         map.extentZoom = function (val) {
+           return calcExtentZoom(geoExtent(val), _dimensions);
+         };

 
 

-           editMenu.anchorLoc = function(val) {
-               if (!arguments.length) { return _anchorLoc; }
-               _anchorLoc = val;
-               _anchorLocLonLat = context.projection.invert(_anchorLoc);
-               return editMenu;
-           };
+         map.trimmedExtentZoom = function (val) {
+           var trimY = 120;
+           var trimX = 40;
+           var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
+           return calcExtentZoom(geoExtent(val), trimmed);
+         };

 
 

-           editMenu.triggerType = function(val) {
-               if (!arguments.length) { return _triggerType; }
-               _triggerType = val;
-               return editMenu;
-           };
+         map.withinEditableZoom = function () {
+           return map.zoom() >= context.minEditableZoom();
+         };

 
 

-           editMenu.operations = function(val) {
-               if (!arguments.length) { return _operations; }
-               _operations = val;
-               return editMenu;
-           };
+         map.isInWideSelection = function () {
+           return !map.withinEditableZoom() && context.selectedIDs().length;
+         };

 
 

-           return utilRebind(editMenu, dispatch$1, 'on');
-       }
+         map.editableDataEnabled = function (skipZoomCheck) {
+           var layer = context.layers().layer('osm');
+           if (!layer || !layer.enabled()) return false;
+           return skipZoomCheck || map.withinEditableZoom();
+         };

 
 

-       function uiFeatureInfo(context) {
-           function update(selection) {
-               var features = context.features();
-               var stats = features.stats();
-               var count = 0;
-               var hiddenList = features.hidden().map(function(k) {
-                   if (stats[k]) {
-                       count += stats[k];
-                       return String(stats[k]) + ' ' + _t('feature.' + k + '.description');
-                   }
-               }).filter(Boolean);
+         map.notesEditable = function () {
+           var layer = context.layers().layer('notes');
+           if (!layer || !layer.enabled()) return false;
+           return map.withinEditableZoom();
+         };

 
 

-               selection.html('');
+         map.minzoom = function (val) {
+           if (!arguments.length) return _minzoom;
+           _minzoom = val;
+           return map;
+         };

 
 

-               if (hiddenList.length) {
-                   var tooltipBehavior = uiTooltip()
-                       .placement('top')
-                       .title(function() {
-                           return hiddenList.join('<br/>');
-                       });
+         map.toggleHighlightEdited = function () {
+           surface.classed('highlight-edited', !surface.classed('highlight-edited'));
+           map.pan([0, 0]); // trigger a redraw

 
 

-                   selection.append('a')
-                       .attr('class', 'chip')
-                       .attr('href', '#')
-                       .attr('tabindex', -1)
-                       .html(_t('feature_info.hidden_warning', { count: count }))
-                       .call(tooltipBehavior)
-                       .on('click', function() {
-                           tooltipBehavior.hide();
-                           event.preventDefault();
-                           // open the Map Data pane
-                           context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
-                       });
-               }
+           dispatch.call('changeHighlighting', this);
+         };

 
 

-               selection
-                   .classed('hide', !hiddenList.length);
-           }
+         map.areaFillOptions = ['wireframe', 'partial', 'full'];

 
 

+         map.activeAreaFill = function (val) {
+           if (!arguments.length) return corePreferences('area-fill') || 'partial';
+           corePreferences('area-fill', val);

 
 

-           return function(selection) {
-               update(selection);
+           if (val !== 'wireframe') {
+             corePreferences('area-fill-toggle', val);
+           }

 
 

-               context.features().on('change.feature_info', function() {
-                   update(selection);
-               });
-           };
-       }
+           updateAreaFill();
+           map.pan([0, 0]); // trigger a redraw

 
 

-       function uiFlash(context) {
-           var _flashTimer;
+           dispatch.call('changeAreaFill', this);
+           return map;
+         };

 
 

-           var _duration = 2000;
-           var _iconName = '#iD-icon-no';
-           var _iconClass = 'disabled';
-           var _text = '';
-           var _textClass;
+         map.toggleWireframe = function () {
+           var activeFill = map.activeAreaFill();

 
 

-           function flash() {
-               if (_flashTimer) {
-                   _flashTimer.stop();
-               }
+           if (activeFill === 'wireframe') {
+             activeFill = corePreferences('area-fill-toggle') || 'partial';
+           } else {
+             activeFill = 'wireframe';
+           }

 
 

-               context.container().select('.main-footer-wrap')
-                   .classed('footer-hide', true)
-                   .classed('footer-show', false);
-               context.container().select('.flash-wrap')
-                   .classed('footer-hide', false)
-                   .classed('footer-show', true);
+           map.activeAreaFill(activeFill);
+         };

 
 

-               var content = context.container().select('.flash-wrap').selectAll('.flash-content')
-                   .data([0]);
+         function updateAreaFill() {
+           var activeFill = map.activeAreaFill();
+           map.areaFillOptions.forEach(function (opt) {
+             surface.classed('fill-' + opt, Boolean(opt === activeFill));
+           });
+         }

 
 

-               // Enter
-               var contentEnter = content.enter()
-                   .append('div')
-                   .attr('class', 'flash-content');
+         map.layers = function () {
+           return drawLayers;
+         };

 
 

-               var iconEnter = contentEnter
-                   .append('svg')
-                   .attr('class', 'flash-icon icon')
-                   .append('g')
-                   .attr('transform', 'translate(10,10)');
+         map.doubleUpHandler = function () {
+           return _doubleUpHandler;
+         };

 
 

-               iconEnter
-                   .append('circle')
-                   .attr('r', 9);
+         return utilRebind(map, dispatch, 'on');
+       }

 
 

-               iconEnter
-                   .append('use')
-                   .attr('transform', 'translate(-7,-7)')
-                   .attr('width', '14')
-                   .attr('height', '14');
+       function rendererPhotos(context) {
+         var dispatch = dispatch$8('change');
+         var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
+         var _allPhotoTypes = ['flat', 'panoramic'];

 
 

-               contentEnter
-                   .append('div')
-                   .attr('class', 'flash-text');
+         var _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy

 
 
 
 

-               // Update
-               content = content
-                   .merge(contentEnter);
+         var _dateFilters = ['fromDate', 'toDate'];

 
 

-               content
-                   .selectAll('.flash-icon')
-                   .attr('class', 'icon flash-icon ' + (_iconClass || ''));
+         var _fromDate;

 
 

-               content
-                   .selectAll('.flash-icon use')
-                   .attr('xlink:href', _iconName);
+         var _toDate;

 
 

-               content
-                   .selectAll('.flash-text')
-                   .attr('class', 'flash-text ' + (_textClass || ''))
-                   .text(_text);
+         var _usernames;

 
 

+         function photos() {}

 
 

-               _flashTimer = d3_timeout(function() {
-                   _flashTimer = null;
-                   context.container().select('.main-footer-wrap')
-                       .classed('footer-hide', false)
-                       .classed('footer-show', true);
-                   context.container().select('.flash-wrap')
-                       .classed('footer-hide', true)
-                       .classed('footer-show', false);
-               }, _duration);
+         function updateStorage() {
+           if (window.mocha) return;
+           var hash = utilStringQs(window.location.hash);
+           var enabled = context.layers().all().filter(function (d) {
+             return _layerIDs.indexOf(d.id) !== -1 && d.layer && d.layer.supported() && d.layer.enabled();
+           }).map(function (d) {
+             return d.id;
+           });

 
 

-               return content;
+           if (enabled.length) {
+             hash.photo_overlay = enabled.join(',');
+           } else {
+             delete hash.photo_overlay;

            }
 
            }
 

+           window.location.replace('#' + utilQsString(hash, true));
+         }

 
 

-           flash.duration = function(_) {
-               if (!arguments.length) { return _duration; }
-               _duration = _;
-               return flash;
-           };
-
-           flash.text = function(_) {
-               if (!arguments.length) { return _text; }
-               _text = _;
-               return flash;
-           };
-
-           flash.textClass = function(_) {
-               if (!arguments.length) { return _textClass; }
-               _textClass = _;
-               return flash;
-           };
-
-           flash.iconName = function(_) {
-               if (!arguments.length) { return _iconName; }
-               _iconName = _;
-               return flash;
-           };
+         photos.overlayLayerIDs = function () {
+           return _layerIDs;
+         };

 
 

-           flash.iconClass = function(_) {
-               if (!arguments.length) { return _iconClass; }
-               _iconClass = _;
-               return flash;
-           };
+         photos.allPhotoTypes = function () {
+           return _allPhotoTypes;
+         };

 
 

-           return flash;
-       }
+         photos.dateFilters = function () {
+           return _dateFilters;
+         };

 
 

-       function uiFullScreen(context) {
-           var element = context.container().node();
-           // var button = d3_select(null);
+         photos.dateFilterValue = function (val) {
+           return val === _dateFilters[0] ? _fromDate : _toDate;
+         };

 
 

+         photos.setDateFilter = function (type, val, updateUrl) {
+           // validate the date
+           var date = val && new Date(val);

 
 

-           function getFullScreenFn() {
-               if (element.requestFullscreen) {
-                   return element.requestFullscreen;
-               } else if (element.msRequestFullscreen) {
-                   return element.msRequestFullscreen;
-               } else if (element.mozRequestFullScreen) {
-                   return element.mozRequestFullScreen;
-               } else if (element.webkitRequestFullscreen) {
-                   return element.webkitRequestFullscreen;
-               }
+           if (date && !isNaN(date)) {
+             val = date.toISOString().substr(0, 10);
+           } else {
+             val = null;

            }
 
            }
 

+           if (type === _dateFilters[0]) {
+             _fromDate = val;

 
 

-           function getExitFullScreenFn() {
-               if (document.exitFullscreen) {
-                   return document.exitFullscreen;
-               } else if (document.msExitFullscreen) {
-                   return document.msExitFullscreen;
-               } else if (document.mozCancelFullScreen) {
-                   return document.mozCancelFullScreen;
-               } else if (document.webkitExitFullscreen) {
-                   return document.webkitExitFullscreen;
-               }
+             if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+               _toDate = _fromDate;
+             }

            }
 
            }
 

+           if (type === _dateFilters[1]) {
+             _toDate = val;

 
 

-           function isFullScreen() {
-               return document.fullscreenElement ||
-                   document.mozFullScreenElement ||
-                   document.webkitFullscreenElement ||
-                   document.msFullscreenElement;
+             if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+               _fromDate = _toDate;
+             }

            }
 
            }
 

+           dispatch.call('change', this);

 
 

-           function isSupported() {
-               return !!getFullScreenFn();
-           }
+           if (updateUrl) {
+             var rangeString;

 
 

+             if (_fromDate || _toDate) {
+               rangeString = (_fromDate || '') + '_' + (_toDate || '');
+             }

 
 

-           function fullScreen() {
-               event.preventDefault();
-               if (!isFullScreen()) {
-                   // button.classed('active', true);
-                   getFullScreenFn().apply(element);
-               } else {
-                   // button.classed('active', false);
-                   getExitFullScreenFn().apply(document);
-               }
+             setUrlFilterValue('photo_dates', rangeString);

            }
            }

+         };

 
 

+         photos.setUsernameFilter = function (val, updateUrl) {
+           if (val && typeof val === 'string') val = val.replace(/;/g, ',').split(',');

 
 

-           return function() { // selection) {
-               if (!isSupported()) { return; }
-
-               // button = selection.append('button')
-               //     .attr('title', t('full_screen'))
-               //     .attr('tabindex', -1)
-               //     .on('click', fullScreen)
-               //     .call(tooltip);
-
-               // button.append('span')
-               //     .attr('class', 'icon full-screen');
+           if (val) {
+             val = val.map(function (d) {
+               return d.trim();
+             }).filter(Boolean);

 
 

-               var detected = utilDetect();
-               var keys = (detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11']);
-               context.keybinding().on(keys, fullScreen);
-           };
-       }
+             if (!val.length) {
+               val = null;
+             }
+           }

 
 

-       function uiGeolocate(context) {
-           var _geolocationOptions = {
-               // prioritize speed and power usage over precision
-               enableHighAccuracy: false,
-               // don't hang indefinitely getting the location
-               timeout: 6000 // 6sec
-           };
-           var _locating = uiLoading(context).message(_t('geolocate.locating')).blocking(true);
-           var _layer = context.layers().layer('geolocate');
-           var _position;
-           var _extent;
-           var _timeoutID;
-           var _button = select(null);
+           _usernames = val;
+           dispatch.call('change', this);

 
 

-           function click() {
-               if (context.inIntro()) { return; }
-               if (!_layer.enabled() && !_locating.isShown()) {
+           if (updateUrl) {
+             var hashString;

 
 

-                   // This timeout ensures that we still call finish() even if
-                   // the user declines to share their location in Firefox
-                   _timeoutID = setTimeout(error, 10000 /* 10sec */ );
+             if (_usernames) {
+               hashString = _usernames.join(',');
+             }

 
 

-                   context.container().call(_locating);
-                   // get the latest position even if we already have one
-                   navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
-               } else {
-                   _locating.close();
-                   _layer.enabled(null, false);
-                   updateButtonState();
-               }
+             setUrlFilterValue('photo_username', hashString);

            }
            }

+         };

 
 

-           function zoomTo() {
-               context.enter(modeBrowse(context));
+         function setUrlFilterValue(property, val) {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);

 
 

-               var map = context.map();
-               _layer.enabled(_position, true);
-               updateButtonState();
-               map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
-           }
+             if (val) {
+               if (hash[property] === val) return;
+               hash[property] = val;
+             } else {
+               if (!(property in hash)) return;
+               delete hash[property];
+             }

 
 

-           function success(geolocation) {
-               _position = geolocation;
-               var coords = _position.coords;
-               _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
-               zoomTo();
-               finish();
+             window.location.replace('#' + utilQsString(hash, true));

            }
            }

+         }

 
 

-           function error() {
-               if (_position) {
-                   // use the position from a previous call if we have one
-                   zoomTo();
-               } else {
-                   context.ui().flash
-                       .text(_t('geolocate.location_unavailable'))
-                       .iconName('#iD-icon-geolocate')();
-               }
+         function showsLayer(id) {
+           var layer = context.layers().layer(id);
+           return layer && layer.supported() && layer.enabled();
+         }

 
 

-               finish();
-           }
+         photos.shouldFilterByDate = function () {
+           return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
+         };

 
 

-           function finish() {
-               _locating.close();  // unblock ui
-               if (_timeoutID) { clearTimeout(_timeoutID); }
-               _timeoutID = undefined;
-           }
+         photos.shouldFilterByPhotoType = function () {
+           return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('openstreetcam');
+         };

 
 

-           function updateButtonState() {
-               _button.classed('active', _layer.enabled());
-           }
+         photos.shouldFilterByUsername = function () {
+           return !showsLayer('mapillary') && showsLayer('openstreetcam') && !showsLayer('streetside');
+         };
+
+         photos.showsPhotoType = function (val) {
+           if (!photos.shouldFilterByPhotoType()) return true;
+           return _shownPhotoTypes.indexOf(val) !== -1;
+         };

 
 

-           return function(selection) {
-               if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) { return; }
+         photos.showsFlat = function () {
+           return photos.showsPhotoType('flat');
+         };

 
 

-               _button = selection
-                   .append('button')
-                   .on('click', click)
-                   .call(svgIcon('#iD-icon-geolocate', 'light'))
-                   .call(uiTooltip()
-                       .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-                       .title(_t('geolocate.title'))
-                       .keys([_t('geolocate.key')])
-                   );
+         photos.showsPanoramic = function () {
+           return photos.showsPhotoType('panoramic');
+         };

 
 

-               context.keybinding().on(_t('geolocate.key'), click);
-           };
-       }
+         photos.fromDate = function () {
+           return _fromDate;
+         };

 
 

-       function uiPanelBackground(context) {
-           var background = context.background();
-           var currSourceName = null;
-           var metadata = {};
-           var metadataKeys = [
-               'zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'
-           ];
+         photos.toDate = function () {
+           return _toDate;
+         };

 
 

-           var debouncedRedraw = debounce(redraw, 250);
+         photos.togglePhotoType = function (val) {
+           var index = _shownPhotoTypes.indexOf(val);
+
+           if (index !== -1) {
+             _shownPhotoTypes.splice(index, 1);
+           } else {
+             _shownPhotoTypes.push(val);
+           }

 
 

-           function redraw(selection) {
-               var source = background.baseLayerSource();
-               if (!source) { return; }
+           dispatch.call('change', this);
+           return photos;
+         };

 
 

-               var isDG = (source.id.match(/^DigitalGlobe/i) !== null);
+         photos.usernames = function () {
+           return _usernames;
+         };

 
 

-               if (currSourceName !== source.name()) {
-                   currSourceName = source.name();
-                   metadata = {};
-               }
+         photos.init = function () {
+           var hash = utilStringQs(window.location.hash);

 
 

-               selection.html('');
+           if (hash.photo_dates) {
+             // expect format like `photo_dates=2019-01-01_2020-12-31`, but allow a couple different separators
+             var parts = /^(.*)[–_](.*)$/g.exec(hash.photo_dates.trim());
+             this.setDateFilter('fromDate', parts && parts.length >= 2 && parts[1], false);
+             this.setDateFilter('toDate', parts && parts.length >= 3 && parts[2], false);
+           }

 
 

-               var list = selection
-                   .append('ul')
-                   .attr('class', 'background-info');
-
-               list
-                   .append('li')
-                   .text(currSourceName);
-
-               metadataKeys.forEach(function(k) {
-                   // DigitalGlobe vintage is available in raster layers for now.
-                   if (isDG && k === 'vintage') { return; }
-
-                   list
-                       .append('li')
-                       .attr('class', 'background-info-list-' + k)
-                       .classed('hide', !metadata[k])
-                       .text(_t('info_panels.background.' + k) + ':')
-                       .append('span')
-                       .attr('class', 'background-info-span-' + k)
-                       .text(metadata[k]);
-               });
+           if (hash.photo_username) {
+             this.setUsernameFilter(hash.photo_username, false);
+           }

 
 

-               debouncedGetMetadata(selection);
+           if (hash.photo_overlay) {
+             // support enabling photo layers by default via a URL parameter, e.g. `photo_overlay=openstreetcam;mapillary;streetside`
+             var hashOverlayIDs = hash.photo_overlay.replace(/;/g, ',').split(',');
+             hashOverlayIDs.forEach(function (id) {
+               var layer = _layerIDs.indexOf(id) !== -1 && context.layers().layer(id);
+               if (layer && !layer.enabled()) layer.enabled(true);
+             });
+           }

 
 

-               var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
+           if (hash.photo) {
+             // support opening a photo via a URL parameter, e.g. `photo=mapillary-fztgSDtLpa08ohPZFZjeRQ`
+             var photoIds = hash.photo.replace(/;/g, ',').split(',');
+             var photoId = photoIds.length && photoIds[0].trim();
+             var results = /(.*)\/(.*)/g.exec(photoId);
+
+             if (results && results.length >= 3) {
+               var serviceId = results[1];
+               var photoKey = results[2];
+               var service = services[serviceId];
+
+               if (service && service.ensureViewerLoaded) {
+                 // if we're showing a photo then make sure its layer is enabled too
+                 var layer = _layerIDs.indexOf(serviceId) !== -1 && context.layers().layer(serviceId);
+                 if (layer && !layer.enabled()) layer.enabled(true);
+                 var baselineTime = Date.now();
+                 service.on('loadedImages.rendererPhotos', function () {
+                   // don't open the viewer if too much time has elapsed
+                   if (Date.now() - baselineTime > 45000) {
+                     service.on('loadedImages.rendererPhotos', null);
+                     return;
+                   }

 
 

-               selection
-                   .append('a')
-                   .text(_t('info_panels.background.' + toggleTiles))
-                   .attr('href', '#')
-                   .attr('class', 'button button-toggle-tiles')
-                   .on('click', function() {
-                       event.preventDefault();
-                       context.setDebug('tile', !context.getDebug('tile'));
-                       selection.call(redraw);
+                   if (!service.cachedImage(photoKey)) return;
+                   service.on('loadedImages.rendererPhotos', null);
+                   service.ensureViewerLoaded(context).then(function () {
+                     service.selectImage(context, photoKey).showViewer(context);

                    });
                    });

-
-               if (isDG) {
-                   var key = source.id + '-vintage';
-                   var sourceVintage = context.background().findSource(key);
-                   var showsVintage = context.background().showsLayer(sourceVintage);
-                   var toggleVintage = showsVintage ? 'hide_vintage' : 'show_vintage';
-                   selection
-                       .append('a')
-                       .text(_t('info_panels.background.' + toggleVintage))
-                       .attr('href', '#')
-                       .attr('class', 'button button-toggle-vintage')
-                       .on('click', function() {
-                           event.preventDefault();
-                           context.background().toggleOverlayLayer(sourceVintage);
-                           selection.call(redraw);
-                       });
+                 });

                }
                }

-
-               // disable if necessary
-               ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function(layerId) {
-                   if (source.id !== layerId) {
-                       var key = layerId + '-vintage';
-                       var sourceVintage = context.background().findSource(key);
-                       if (context.background().showsLayer(sourceVintage)) {
-                           context.background().toggleOverlayLayer(sourceVintage);
-                       }
-                   }
-               });
+             }

            }
 
            }
 

+           context.layers().on('change.rendererPhotos', updateStorage);
+         };

 
 

-           var debouncedGetMetadata = debounce(getMetadata, 250);
+         return utilRebind(photos, dispatch, 'on');
+       }

 
 

-           function getMetadata(selection) {
-               var tile = context.container().select('.layer-background img.tile-center');   // tile near viewport center
-               if (tile.empty()) { return; }
+       function uiAccount(context) {
+         var osm = context.connection();

 
 

-               var sourceName = currSourceName;
-               var d = tile.datum();
-               var zoom = (d && d.length >= 3 && d[2]) || Math.floor(context.map().zoom());
-               var center = context.map().center();
+         function update(selection) {
+           if (!osm) return;

 
 

-               // update zoom
-               metadata.zoom = String(zoom);
-               selection.selectAll('.background-info-list-zoom')
-                   .classed('hide', false)
-                   .selectAll('.background-info-span-zoom')
-                   .text(metadata.zoom);
-
-               if (!d || !d.length >= 3) { return; }
-
-               background.baseLayerSource().getMetadata(center, d, function(err, result) {
-                   if (err || currSourceName !== sourceName) { return; }
-
-                   // update vintage
-                   var vintage = result.vintage;
-                   metadata.vintage = (vintage && vintage.range) || _t('info_panels.background.unknown');
-                   selection.selectAll('.background-info-list-vintage')
-                       .classed('hide', false)
-                       .selectAll('.background-info-span-vintage')
-                       .text(metadata.vintage);
-
-                   // update other metdata
-                   metadataKeys.forEach(function(k) {
-                       if (k === 'zoom' || k === 'vintage') { return; }  // done already
-                       var val = result[k];
-                       metadata[k] = val;
-                       selection.selectAll('.background-info-list-' + k)
-                           .classed('hide', !val)
-                           .selectAll('.background-info-span-' + k)
-                           .text(val);
-                   });
-               });
+           if (!osm.authenticated()) {
+             selection.selectAll('.userLink, .logoutLink').classed('hide', true);
+             return;

            }
 
            }
 

+           osm.userDetails(function (err, details) {
+             var userLink = selection.select('.userLink'),
+                 logoutLink = selection.select('.logoutLink');
+             userLink.html('');
+             logoutLink.html('');
+             if (err || !details) return;
+             selection.selectAll('.userLink, .logoutLink').classed('hide', false); // Link

 
 

-           var panel = function(selection) {
-               selection.call(redraw);
-
-               context.map()
-                   .on('drawn.info-background', function() {
-                       selection.call(debouncedRedraw);
-                   })
-                   .on('move.info-background', function() {
-                       selection.call(debouncedGetMetadata);
-                   });
+             var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont

 
 

-           };
+             if (details.image_url) {
+               userLinkA.append('img').attr('class', 'icon pre-text user-icon').attr('src', details.image_url);
+             } else {
+               userLinkA.call(svgIcon('#iD-icon-avatar', 'pre-text light'));
+             } // Add user name

 
 

-           panel.off = function() {
-               context.map()
-                   .on('drawn.info-background', null)
-                   .on('move.info-background', null);
-           };

 
 

-           panel.id = 'background';
-           panel.title = _t('info_panels.background.title');
-           panel.key = _t('info_panels.background.key');
+             userLinkA.append('span').attr('class', 'label').html(details.display_name);
+             logoutLink.append('a').attr('class', 'logout').attr('href', '#').html(_t.html('logout')).on('click.logout', function (d3_event) {
+               d3_event.preventDefault();
+               osm.logout();
+             });
+           });
+         }

 
 

+         return function (selection) {
+           selection.append('li').attr('class', 'userLink').classed('hide', true);
+           selection.append('li').attr('class', 'logoutLink').classed('hide', true);

 
 

-           return panel;
+           if (osm) {
+             osm.on('change.account', function () {
+               update(selection);
+             });
+             update(selection);
+           }
+         };

        }
 
        }
 

-       function uiPanelHistory(context) {
-           var osm;
+       function uiAttribution(context) {
+         var _selection = select(null);

 
 

-           function displayTimestamp(timestamp) {
-               if (!timestamp) { return _t('info_panels.history.unknown'); }
-               var options = {
-                   day: 'numeric', month: 'short', year: 'numeric',
-                   hour: 'numeric', minute: 'numeric', second: 'numeric'
-               };
-               var d = new Date(timestamp);
-               if (isNaN(d.getTime())) { return _t('info_panels.history.unknown'); }
-               return d.toLocaleString(_mainLocalizer.localeCode(), options);
-           }
+         function render(selection, data, klass) {
+           var div = selection.selectAll(".".concat(klass)).data([0]);
+           div = div.enter().append('div').attr('class', klass).merge(div);
+           var attributions = div.selectAll('.attribution').data(data, function (d) {
+             return d.id;
+           });
+           attributions.exit().remove();
+           attributions = attributions.enter().append('span').attr('class', 'attribution').each(function (d, i, nodes) {
+             var attribution = select(nodes[i]);

 
 

+             if (d.terms_html) {
+               attribution.html(d.terms_html);
+               return;
+             }

 
 

-           function displayUser(selection, userName) {
-               if (!userName) {
-                   selection
-                       .append('span')
-                       .text(_t('info_panels.history.unknown'));
-                   return;
-               }
+             if (d.terms_url) {
+               attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
+             }

 
 

-               selection
-                   .append('span')
-                   .attr('class', 'user-name')
-                   .text(userName);
+             var sourceID = d.id.replace(/\./g, '<TX_DOT>');
+             var terms_text = _t("imagery.".concat(sourceID, ".attribution.text"), {
+               "default": d.terms_text || d.id || d.name()
+             });

 
 

-               var links = selection
-                   .append('div')
-                   .attr('class', 'links');
+             if (d.icon && !d.overlay) {
+               attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
+             }

 
 

-               if (osm) {
-                   links
-                       .append('a')
-                       .attr('class', 'user-osm-link')
-                       .attr('href', osm.userURL(userName))
-                       .attr('target', '_blank')
-                       .attr('tabindex', -1)
-                       .text('OSM');
-               }
-
-               links
-                   .append('a')
-                   .attr('class', 'user-hdyc-link')
-                   .attr('href', 'https://hdyc.neis-one.org/?' + userName)
-                   .attr('target', '_blank')
-                   .attr('tabindex', -1)
-                   .text('HDYC');
-           }
-
-
-           function displayChangeset(selection, changeset) {
-               if (!changeset) {
-                   selection
-                       .append('span')
-                       .text(_t('info_panels.history.unknown'));
-                   return;
-               }
+             attribution.append('span').attr('class', 'attribution-text').html(terms_text);
+           }).merge(attributions);
+           var copyright = attributions.selectAll('.copyright-notice').data(function (d) {
+             var notice = d.copyrightNotices(context.map().zoom(), context.map().extent());
+             return notice ? [notice] : [];
+           });
+           copyright.exit().remove();
+           copyright = copyright.enter().append('span').attr('class', 'copyright-notice').merge(copyright);
+           copyright.html(String);
+         }

 
 

-               selection
-                   .append('span')
-                   .attr('class', 'changeset-id')
-                   .text(changeset);
+         function update() {
+           var baselayer = context.background().baseLayerSource();

 
 

-               var links = selection
-                   .append('div')
-                   .attr('class', 'links');
+           _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');

 
 

-               if (osm) {
-                   links
-                       .append('a')
-                       .attr('class', 'changeset-osm-link')
-                       .attr('href', osm.changesetURL(changeset))
-                       .attr('target', '_blank')
-                       .attr('tabindex', -1)
-                       .text('OSM');
-               }
-
-               links
-                   .append('a')
-                   .attr('class', 'changeset-osmcha-link')
-                   .attr('href', 'https://osmcha.org/changesets/' + changeset)
-                   .attr('target', '_blank')
-                   .attr('tabindex', -1)
-                   .text('OSMCha');
-
-               links
-                   .append('a')
-                   .attr('class', 'changeset-achavi-link')
-                   .attr('href', 'https://overpass-api.de/achavi/?changeset=' + changeset)
-                   .attr('target', '_blank')
-                   .attr('tabindex', -1)
-                   .text('Achavi');
-           }
-
-
-           function redraw(selection) {
-               var selectedNoteID = context.selectedNoteID();
-               osm = context.connection();
-
-               var selected, note, entity;
-               if (selectedNoteID && osm) {       // selected 1 note
-                   selected = [ _t('note.note') + ' ' + selectedNoteID ];
-                   note = osm.getNote(selectedNoteID);
-               } else {                           // selected 1..n entities
-                   selected = context.selectedIDs()
-                       .filter(function(e) { return context.hasEntity(e); });
-                   if (selected.length) {
-                       entity = context.entity(selected[0]);
-                   }
-               }
+           var z = context.map().zoom();
+           var overlays = context.background().overlayLayerSources() || [];

 
 

-               var singular = selected.length === 1 ? selected[0] : null;
+           _selection.call(render, overlays.filter(function (s) {
+             return s.validZoom(z);
+           }), 'overlay-layer-attribution');
+         }

 
 

-               selection.html('');
+         return function (selection) {
+           _selection = selection;
+           context.background().on('change.attribution', update);
+           context.map().on('move.attribution', throttle(update, 400, {
+             leading: false
+           }));
+           update();
+         };
+       }

 
 

-               selection
-                   .append('h4')
-                   .attr('class', 'history-heading')
-                   .text(singular || _t('info_panels.history.selected', { n: selected.length }));
+       function uiContributors(context) {
+         var osm = context.connection(),
+             debouncedUpdate = debounce(function () {
+           update();
+         }, 1000),
+             limit = 4,
+             hidden = false,
+             wrap = select(null);

 
 

-               if (!singular) { return; }
+         function update() {
+           if (!osm) return;
+           var users = {},
+               entities = context.history().intersects(context.map().extent());
+           entities.forEach(function (entity) {
+             if (entity && entity.user) users[entity.user] = true;
+           });
+           var u = Object.keys(users),
+               subset = u.slice(0, u.length > limit ? limit - 1 : limit);
+           wrap.html('').call(svgIcon('#iD-icon-nearby', 'pre-text light'));
+           var userList = select(document.createElement('span'));
+           userList.selectAll().data(subset).enter().append('a').attr('class', 'user-link').attr('href', function (d) {
+             return osm.userURL(d);
+           }).attr('target', '_blank').html(String);
+
+           if (u.length > limit) {
+             var count = select(document.createElement('span'));
+             var othersNum = u.length - limit + 1;
+             count.append('a').attr('target', '_blank').attr('href', function () {
+               return osm.changesetsURL(context.map().center(), context.map().zoom());
+             }).html(othersNum);
+             wrap.append('span').html(_t.html('contributors.truncated_list', {
+               n: othersNum,
+               users: userList.html(),
+               count: count.html()
+             }));
+           } else {
+             wrap.append('span').html(_t.html('contributors.list', {
+               users: userList.html()
+             }));
+           }

 
 

-               if (entity) {
-                   selection.call(redrawEntity, entity);
-               } else if (note) {
-                   selection.call(redrawNote, note);
-               }
+           if (!u.length) {
+             hidden = true;
+             wrap.transition().style('opacity', 0);
+           } else if (hidden) {
+             wrap.transition().style('opacity', 1);

            }
            }

+         }

 
 

+         return function (selection) {
+           if (!osm) return;
+           wrap = selection;
+           update();
+           osm.on('loaded.contributors', debouncedUpdate);
+           context.map().on('move.contributors', debouncedUpdate);
+         };
+       }

 
 

-           function redrawNote(selection, note) {
-               if (!note || note.isNew()) {
-                   selection
-                       .append('div')
-                       .text(_t('info_panels.history.note_no_history'));
-                   return;
-               }
+       var _popoverID = 0;
+       function uiPopover(klass) {
+         var _id = _popoverID++;

 
 

-               var list = selection
-                   .append('ul');
+         var _anchorSelection = select(null);

 
 

-               list
-                   .append('li')
-                   .text(_t('info_panels.history.note_comments') + ':')
-                   .append('span')
-                   .text(note.comments.length);
+         var popover = function popover(selection) {
+           _anchorSelection = selection;
+           selection.each(setup);
+         };

 
 

-               if (note.comments.length) {
-                   list
-                       .append('li')
-                       .text(_t('info_panels.history.note_created_date') + ':')
-                       .append('span')
-                       .text(displayTimestamp(note.comments[0].date));
+         var _animation = utilFunctor(false);

 
 

-                   list
-                       .append('li')
-                       .text(_t('info_panels.history.note_created_user') + ':')
-                       .call(displayUser, note.comments[0].user);
-               }
+         var _placement = utilFunctor('top'); // top, bottom, left, right

 
 

-               if (osm) {
-                   selection
-                       .append('a')
-                       .attr('class', 'view-history-on-osm')
-                       .attr('target', '_blank')
-                       .attr('tabindex', -1)
-                       .attr('href', osm.noteURL(note))
-                       .call(svgIcon('#iD-icon-out-link', 'inline'))
-                       .append('span')
-                       .text(_t('info_panels.history.note_link_text'));
-               }
-           }

 
 

+         var _alignment = utilFunctor('center'); // leading, center, trailing

 
 

-           function redrawEntity(selection, entity) {
-               if (!entity || entity.isNew()) {
-                   selection
-                       .append('div')
-                       .text(_t('info_panels.history.no_history'));
-                   return;
-               }

 
 

-               var links = selection
-                   .append('div')
-                   .attr('class', 'links');
+         var _scrollContainer = utilFunctor(select(null));

 
 

-               if (osm) {
-                   links
-                       .append('a')
-                       .attr('class', 'view-history-on-osm')
-                       .attr('href', osm.historyURL(entity))
-                       .attr('target', '_blank')
-                       .attr('tabindex', -1)
-                       .attr('title', _t('info_panels.history.link_text'))
-                       .text('OSM');
-               }
-               links
-                   .append('a')
-                   .attr('class', 'pewu-history-viewer-link')
-                   .attr('href', 'https://pewu.github.io/osm-history/#/' + entity.type + '/' + entity.osmId())
-                   .attr('target', '_blank')
-                   .attr('tabindex', -1)
-                   .text('PeWu');
-
-               var list = selection
-                   .append('ul');
-
-               list
-                   .append('li')
-                   .text(_t('info_panels.history.version') + ':')
-                   .append('span')
-                   .text(entity.version);
-
-               list
-                   .append('li')
-                   .text(_t('info_panels.history.last_edit') + ':')
-                   .append('span')
-                   .text(displayTimestamp(entity.timestamp));
-
-               list
-                   .append('li')
-                   .text(_t('info_panels.history.edited_by') + ':')
-                   .call(displayUser, entity.user);
-
-               list
-                   .append('li')
-                   .text(_t('info_panels.history.changeset') + ':')
-                   .call(displayChangeset, entity.changeset);
-           }
-
-
-           var panel = function(selection) {
-               selection.call(redraw);
+         var _content;

 
 

-               context.map()
-                   .on('drawn.info-history', function() {
-                       selection.call(redraw);
-                   });
+         var _displayType = utilFunctor('');

 
 

-               context
-                   .on('enter.info-history', function() {
-                       selection.call(redraw);
-                   });
-           };
+         var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events

 
 

-           panel.off = function() {
-               context.map().on('drawn.info-history', null);
-               context.on('enter.info-history', null);
-           };

 
 

-           panel.id = 'history';
-           panel.title = _t('info_panels.history.title');
-           panel.key = _t('info_panels.history.key');
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

 
 

+         popover.displayType = function (val) {
+           if (arguments.length) {
+             _displayType = utilFunctor(val);
+             return popover;
+           } else {
+             return _displayType;
+           }
+         };

 
 

-           return panel;
-       }
+         popover.hasArrow = function (val) {
+           if (arguments.length) {
+             _hasArrow = utilFunctor(val);
+             return popover;
+           } else {
+             return _hasArrow;
+           }
+         };

 
 

-       var OSM_PRECISION = 7;
+         popover.placement = function (val) {
+           if (arguments.length) {
+             _placement = utilFunctor(val);
+             return popover;
+           } else {
+             return _placement;
+           }
+         };

 
 

-       /**
-        * Returns a localized representation of the given length measurement.
-        *
-        * @param {Number} m area in meters
-        * @param {Boolean} isImperial true for U.S. customary units; false for metric
-        */
-       function displayLength(m, isImperial) {
-           var d = m * (isImperial ? 3.28084 : 1);
-           var unit;
+         popover.alignment = function (val) {
+           if (arguments.length) {
+             _alignment = utilFunctor(val);
+             return popover;
+           } else {
+             return _alignment;
+           }
+         };

 
 

-           if (isImperial) {
-               if (d >= 5280) {
-                   d /= 5280;
-                   unit = 'miles';
-               } else {
-                   unit = 'feet';
-               }
+         popover.scrollContainer = function (val) {
+           if (arguments.length) {
+             _scrollContainer = utilFunctor(val);
+             return popover;

            } else {
            } else {

-               if (d >= 1000) {
-                   d /= 1000;
-                   unit = 'kilometers';
-               } else {
-                   unit = 'meters';
-               }
+             return _scrollContainer;

            }
            }

+         };

 
 

-           return _t('units.' + unit, {
-               quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
-                   maximumSignificantDigits: 4
-               })
-           });
-       }
+         popover.content = function (val) {
+           if (arguments.length) {
+             _content = val;
+             return popover;
+           } else {
+             return _content;
+           }
+         };

 
 

-       /**
-        * Returns a localized representation of the given area measurement.
-        *
-        * @param {Number} m2 area in square meters
-        * @param {Boolean} isImperial true for U.S. customary units; false for metric
-        */
-       function displayArea(m2, isImperial) {
-           var locale = _mainLocalizer.localeCode();
-           var d = m2 * (isImperial ? 10.7639111056 : 1);
-           var d1, d2, area;
-           var unit1 = '';
-           var unit2 = '';
+         popover.isShown = function () {
+           var popoverSelection = _anchorSelection.select('.popover-' + _id);

 
 

-           if (isImperial) {
-               if (d >= 6969600) { // > 0.25mi² show mi²
-                   d1 = d / 27878400;
-                   unit1 = 'square_miles';
-               } else {
-                   d1 = d;
-                   unit1 = 'square_feet';
-               }
+           return !popoverSelection.empty() && popoverSelection.classed('in');
+         };

 
 

-               if (d > 4356 && d < 43560000) { // 0.1 - 1000 acres
-                   d2 = d / 43560;
-                   unit2 = 'acres';
-               }
+         popover.show = function () {
+           _anchorSelection.each(show);
+         };

 
 

-           } else {
-               if (d >= 250000) { // > 0.25km² show km²
-                   d1 = d / 1000000;
-                   unit1 = 'square_kilometers';
-               } else {
-                   d1 = d;
-                   unit1 = 'square_meters';
-               }
+         popover.updateContent = function () {
+           _anchorSelection.each(updateContent);
+         };

 
 

-               if (d > 1000 && d < 10000000) { // 0.1 - 1000 hectares
-                   d2 = d / 10000;
-                   unit2 = 'hectares';
-               }
-           }
+         popover.hide = function () {
+           _anchorSelection.each(hide);
+         };

 
 

-           area = _t('units.' + unit1, {
-               quantity: d1.toLocaleString(locale, {
-                   maximumSignificantDigits: 4
-               })
-           });
+         popover.toggle = function () {
+           _anchorSelection.each(toggle);
+         };

 
 

-           if (d2) {
-               return _t('units.area_pair', {
-                   area1: area,
-                   area2: _t('units.' + unit2, {
-                       quantity: d2.toLocaleString(locale, {
-                           maximumSignificantDigits: 2
-                       })
-                   })
-               });
-           } else {
-               return area;
-           }
-       }
+         popover.destroy = function (selection, selector) {
+           // by default, just destroy the current popover
+           selector = selector || '.popover-' + _id;
+           selection.on(_pointerPrefix + 'enter.popover', null).on(_pointerPrefix + 'leave.popover', null).on(_pointerPrefix + 'up.popover', null).on(_pointerPrefix + 'down.popover', null).on('click.popover', null).attr('title', function () {
+             return this.getAttribute('data-original-title') || this.getAttribute('title');
+           }).attr('data-original-title', null).selectAll(selector).remove();
+         };

 
 

-       function wrap(x, min, max) {
-           var d = max - min;
-           return ((x - min) % d + d) % d + min;
-       }
+         popover.destroyAny = function (selection) {
+           selection.call(popover.destroy, '.popover');
+         };

 
 

-       function clamp$1(x, min, max) {
-           return Math.max(min, Math.min(x, max));
-       }
+         function setup() {
+           var anchor = select(this);

 
 

-       function displayCoordinate(deg, pos, neg) {
-           var locale = _mainLocalizer.localeCode();
-           var min = (Math.abs(deg) - Math.floor(Math.abs(deg))) * 60;
-           var sec = (min - Math.floor(min)) * 60;
-           var displayDegrees = _t('units.arcdegrees', {
-               quantity: Math.floor(Math.abs(deg)).toLocaleString(locale)
-           });
-           var displayCoordinate;
-
-           if (Math.floor(sec) > 0) {
-               displayCoordinate = displayDegrees +
-                   _t('units.arcminutes', {
-                       quantity: Math.floor(min).toLocaleString(locale)
-                   }) +
-                   _t('units.arcseconds', {
-                       quantity: Math.round(sec).toLocaleString(locale)
-                   });
-           } else if (Math.floor(min) > 0) {
-               displayCoordinate = displayDegrees +
-                   _t('units.arcminutes', {
-                       quantity: Math.round(min).toLocaleString(locale)
-                   });
-           } else {
-               displayCoordinate = _t('units.arcdegrees', {
-                   quantity: Math.round(Math.abs(deg)).toLocaleString(locale)
-               });
-           }
+           var animate = _animation.apply(this, arguments);

 
 

-           if (deg === 0) {
-               return displayCoordinate;
-           } else {
-               return _t('units.coordinate', {
-                   coordinate: displayCoordinate,
-                   direction: _t('units.' + (deg > 0 ? pos : neg))
-               });
-           }
-       }
+           var popoverSelection = anchor.selectAll('.popover-' + _id).data([0]);
+           var enter = popoverSelection.enter().append('div').attr('class', 'popover popover-' + _id + ' ' + (klass ? klass : '')).classed('arrowed', _hasArrow.apply(this, arguments));
+           enter.append('div').attr('class', 'popover-arrow');
+           enter.append('div').attr('class', 'popover-inner');
+           popoverSelection = enter.merge(popoverSelection);

 
 

-       /**
-        * Returns given coordinate pair in degree-minute-second format.
-        *
-        * @param {Array<Number>} coord longitude and latitude
-        */
-       function dmsCoordinatePair(coord) {
-           return _t('units.coordinate_pair', {
-               latitude: displayCoordinate(clamp$1(coord[1], -90, 90), 'north', 'south'),
-               longitude: displayCoordinate(wrap(coord[0], -180, 180), 'east', 'west')
-           });
-       }
+           if (animate) {
+             popoverSelection.classed('fade', true);
+           }

 
 

-       /**
-        * Returns the given coordinate pair in decimal format.
-        * note: unlocalized to avoid comma ambiguity - see #4765
-        *
-        * @param {Array<Number>} coord longitude and latitude
-        */
-       function decimalCoordinatePair(coord) {
-           return _t('units.coordinate_pair', {
-               latitude: clamp$1(coord[1], -90, 90).toFixed(OSM_PRECISION),
-               longitude: wrap(coord[0], -180, 180).toFixed(OSM_PRECISION)
-           });
-       }
+           var display = _displayType.apply(this, arguments);

 
 

-       function uiPanelLocation(context) {
-           var currLocation = '';
+           if (display === 'hover') {
+             var _lastNonMouseEnterTime;

 
 

+             anchor.on(_pointerPrefix + 'enter.popover', function (d3_event) {
+               if (d3_event.pointerType) {
+                 if (d3_event.pointerType !== 'mouse') {
+                   _lastNonMouseEnterTime = d3_event.timeStamp; // only allow hover behavior for mouse input

 
 

-           function redraw(selection) {
-               selection.html('');
+                   return;
+                 } else if (_lastNonMouseEnterTime && d3_event.timeStamp - _lastNonMouseEnterTime < 1500) {
+                   // HACK: iOS 13.4 sends an erroneous `mouse` type pointerenter
+                   // event for non-mouse interactions right after sending
+                   // the correct type pointerenter event. Workaround by discarding
+                   // any mouse event that occurs immediately after a non-mouse event.
+                   return;
+                 }
+               } // don't show if buttons are pressed, e.g. during click and drag of map
+
+
+               if (d3_event.buttons !== 0) return;
+               show.apply(this, arguments);
+             }).on(_pointerPrefix + 'leave.popover', function () {
+               hide.apply(this, arguments);
+             }) // show on focus too for better keyboard navigation support
+             .on('focus.popover', function () {
+               show.apply(this, arguments);
+             }).on('blur.popover', function () {
+               hide.apply(this, arguments);
+             });
+           } else if (display === 'clickFocus') {
+             anchor.on(_pointerPrefix + 'down.popover', function (d3_event) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+             }).on(_pointerPrefix + 'up.popover', function (d3_event) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+             }).on('click.popover', toggle);
+             popoverSelection // This attribute lets the popover take focus
+             .attr('tabindex', 0).on('blur.popover', function () {
+               anchor.each(function () {
+                 hide.apply(this, arguments);
+               });
+             });
+           }
+         }

 
 

-               var list = selection
-                   .append('ul');
+         function show() {
+           var anchor = select(this);
+           var popoverSelection = anchor.selectAll('.popover-' + _id);

 
 

-               // Mouse coordinates
-               var coord = context.map().mouseCoordinates();
-               if (coord.some(isNaN)) {
-                   coord = context.map().center();
-               }
+           if (popoverSelection.empty()) {
+             // popover was removed somehow, put it back
+             anchor.call(popover.destroy);
+             anchor.each(setup);
+             popoverSelection = anchor.selectAll('.popover-' + _id);
+           }

 
 

-               list
-                   .append('li')
-                   .text(dmsCoordinatePair(coord))
-                   .append('li')
-                   .text(decimalCoordinatePair(coord));
+           popoverSelection.classed('in', true);

 
 

-               // Location Info
-               selection
-                   .append('div')
-                   .attr('class', 'location-info')
-                   .text(currLocation || ' ');
+           var displayType = _displayType.apply(this, arguments);

 
 

-               debouncedGetLocation(selection, coord);
+           if (displayType === 'clickFocus') {
+             anchor.classed('active', true);
+             popoverSelection.node().focus();

            }
 
            }
 

+           anchor.each(updateContent);
+         }
+
+         function updateContent() {
+           var anchor = select(this);

 
 

-           var debouncedGetLocation = debounce(getLocation, 250);
-           function getLocation(selection, coord) {
-               if (!services.geocoder) {
-                   currLocation = _t('info_panels.location.unknown_location');
-                   selection.selectAll('.location-info')
-                       .text(currLocation);
-               } else {
-                   services.geocoder.reverse(coord, function(err, result) {
-                       currLocation = result ? result.display_name : _t('info_panels.location.unknown_location');
-                       selection.selectAll('.location-info')
-                           .text(currLocation);
-                   });
-               }
+           if (_content) {
+             anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));

            }
 
            }
 

+           updatePosition.apply(this, arguments); // hack: update multiple times to fix instances where the absolute offset is
+           // set before the dynamic popover size is calculated by the browser

 
 

-           var panel = function(selection) {
-               selection.call(redraw);
+           updatePosition.apply(this, arguments);
+           updatePosition.apply(this, arguments);
+         }

 
 

-               context.surface()
-                   .on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function() {
-                       selection.call(redraw);
-                   });
-           };
+         function updatePosition() {
+           var anchor = select(this);
+           var popoverSelection = anchor.selectAll('.popover-' + _id);

 
 

-           panel.off = function() {
-               context.surface()
-                   .on('.info-location', null);
-           };
+           var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);

 
 

-           panel.id = 'location';
-           panel.title = _t('info_panels.location.title');
-           panel.key = _t('info_panels.location.key');
+           var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
+           var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
+           var scrollTop = scrollNode ? scrollNode.scrollTop : 0;

 
 

+           var placement = _placement.apply(this, arguments);

 
 

-           return panel;
-       }
+           popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);

 
 

-       function uiPanelMeasurement(context) {
-           var locale = _mainLocalizer.localeCode();
-           var isImperial = !_mainLocalizer.usesMetric();
+           var alignment = _alignment.apply(this, arguments);

 
 

+           var alignFactor = 0.5;

 
 

-           function radiansToMeters(r) {
-               // using WGS84 authalic radius (6371007.1809 m)
-               return r * 6371007.1809;
+           if (alignment === 'leading') {
+             alignFactor = 0;
+           } else if (alignment === 'trailing') {
+             alignFactor = 1;

            }
 
            }
 

-           function steradiansToSqmeters(r) {
-               // http://gis.stackexchange.com/a/124857/40446
-               return r / (4 * Math.PI) * 510065621724000;
-           }
+           var anchorFrame = getFrame(anchor.node());
+           var popoverFrame = getFrame(popoverSelection.node());
+           var position;

 
 

+           switch (placement) {
+             case 'top':
+               position = {
+                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+                 y: anchorFrame.y - popoverFrame.h
+               };
+               break;

 
 

-           function toLineString(feature) {
-               if (feature.type === 'LineString') { return feature; }
+             case 'bottom':
+               position = {
+                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+                 y: anchorFrame.y + anchorFrame.h
+               };
+               break;

 
 

-               var result = { type: 'LineString', coordinates: [] };
-               if (feature.type === 'Polygon') {
-                   result.coordinates = feature.coordinates[0];
-               } else if (feature.type === 'MultiPolygon') {
-                   result.coordinates = feature.coordinates[0][0];
-               }
+             case 'left':
+               position = {
+                 x: anchorFrame.x - popoverFrame.w,
+                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+               };
+               break;

 
 

-               return result;
+             case 'right':
+               position = {
+                 x: anchorFrame.x + anchorFrame.w,
+                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+               };
+               break;

            }
 
            }
 

+           if (position) {
+             if (scrollNode && (placement === 'top' || placement === 'bottom')) {
+               var initialPosX = position.x;

 
 

-           function redraw(selection) {
-               var graph = context.graph();
-               var selectedNoteID = context.selectedNoteID();
-               var osm = services.osm;
+               if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
+                 position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
+               } else if (position.x < 10) {
+                 position.x = 10;
+               }

 
 

-               var heading;
-               var center, location, centroid;
-               var closed, geometry;
-               var totalNodeCount, length = 0, area = 0;
+               var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow'); // keep the arrow centered on the button, or as close as possible

 
 

-               if (selectedNoteID && osm) {       // selected 1 note
+               var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
+               arrow.style('left', ~~arrowPosX + 'px');
+             }

 
 

-                   var note = osm.getNote(selectedNoteID);
-                   heading = _t('note.note') + ' ' + selectedNoteID;
-                   location = note.loc;
-                   geometry = 'note';
+             popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
+           } else {
+             popoverSelection.style('left', null).style('top', null);
+           }

 
 

-               } else {                           // selected 1..n entities
-                   var selectedIDs = context.selectedIDs().filter(function(id) {
-                       return context.hasEntity(id);
-                   });
-                   var selected = selectedIDs.map(function(id) {
-                       return context.entity(id);
-                   });
+           function getFrame(node) {
+             var positionStyle = select(node).style('position');

 
 

-                   heading = selected.length === 1 ? selected[0].id :
-                       _t('info_panels.measurement.selected', { n: selected.length.toLocaleString(locale) });
-
-                   if (selected.length) {
-                       var extent = geoExtent();
-                       for (var i in selected) {
-                           var entity = selected[i];
-                           extent._extend(entity.extent(graph));
-
-                           geometry = entity.geometry(graph);
-                           if (geometry === 'line' || geometry === 'area') {
-                               closed = (entity.type === 'relation') || (entity.isClosed() && !entity.isDegenerate());
-                               var feature = entity.asGeoJSON(graph);
-                               length += radiansToMeters(d3_geoLength(toLineString(feature)));
-                               centroid = d3_geoCentroid(feature);
-                               if (closed) {
-                                   area += steradiansToSqmeters(entity.area(graph));
-                               }
-                           }
-                       }
+             if (positionStyle === 'absolute' || positionStyle === 'static') {
+               return {
+                 x: node.offsetLeft - scrollLeft,
+                 y: node.offsetTop - scrollTop,
+                 w: node.offsetWidth,
+                 h: node.offsetHeight
+               };
+             } else {
+               return {
+                 x: 0,
+                 y: 0,
+                 w: node.offsetWidth,
+                 h: node.offsetHeight
+               };
+             }
+           }
+         }

 
 

-                       if (selected.length > 1) {
-                           geometry = null;
-                           closed = null;
-                           centroid = null;
-                       }
+         function hide() {
+           var anchor = select(this);

 
 

-                       if (selected.length === 1 && selected[0].type === 'node') {
-                           location = selected[0].loc;
-                       } else {
-                           totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
-                       }
+           if (_displayType.apply(this, arguments) === 'clickFocus') {
+             anchor.classed('active', false);
+           }

 
 

-                       if (!location && !centroid) {
-                           center = extent.center();
-                       }
-                   }
-               }
+           anchor.selectAll('.popover-' + _id).classed('in', false);
+         }

 
 

-               selection.html('');
+         function toggle() {
+           if (select(this).select('.popover-' + _id).classed('in')) {
+             hide.apply(this, arguments);
+           } else {
+             show.apply(this, arguments);
+           }
+         }

 
 

-               if (heading) {
-                   selection
-                       .append('h4')
-                       .attr('class', 'measurement-heading')
-                       .text(heading);
-               }
+         return popover;
+       }

 
 

-               var list = selection
-                   .append('ul');
-               var coordItem;
+       function uiTooltip(klass) {
+         var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');

 
 

-               if (geometry) {
-                   list
-                       .append('li')
-                       .text(_t('info_panels.measurement.geometry') + ':')
-                       .append('span')
-                       .text(
-                           closed ? _t('info_panels.measurement.closed_' + geometry) : _t('geometry.' + geometry)
-                       );
-               }
+         var _title = function _title() {
+           var title = this.getAttribute('data-original-title');

 
 

-               if (totalNodeCount) {
-                   list
-                       .append('li')
-                       .text(_t('info_panels.measurement.node_count') + ':')
-                       .append('span')
-                       .text(totalNodeCount.toLocaleString(locale));
-               }
-
-               if (area) {
-                   list
-                       .append('li')
-                       .text(_t('info_panels.measurement.area') + ':')
-                       .append('span')
-                       .text(displayArea(area, isImperial));
-               }
-
-               if (length) {
-                   var lengthLabel = _t('info_panels.measurement.' + (closed ? 'perimeter' : 'length'));
-                   list
-                       .append('li')
-                       .text(lengthLabel + ':')
-                       .append('span')
-                       .text(displayLength(length, isImperial));
-               }
-
-               if (location) {
-                   coordItem = list
-                       .append('li')
-                       .text(_t('info_panels.measurement.location') + ':');
-                   coordItem.append('span')
-                       .text(dmsCoordinatePair(location));
-                   coordItem.append('span')
-                       .text(decimalCoordinatePair(location));
-               }
-
-               if (centroid) {
-                   coordItem = list
-                       .append('li')
-                       .text(_t('info_panels.measurement.centroid') + ':');
-                   coordItem.append('span')
-                       .text(dmsCoordinatePair(centroid));
-                   coordItem.append('span')
-                       .text(decimalCoordinatePair(centroid));
-               }
-
-               if (center) {
-                   coordItem = list
-                       .append('li')
-                       .text(_t('info_panels.measurement.center') + ':');
-                   coordItem.append('span')
-                       .text(dmsCoordinatePair(center));
-                   coordItem.append('span')
-                       .text(decimalCoordinatePair(center));
-               }
-
-               if (length || area) {
-                   var toggle  = isImperial ? 'imperial' : 'metric';
-                   selection
-                       .append('a')
-                       .text(_t('info_panels.measurement.' + toggle))
-                       .attr('href', '#')
-                       .attr('class', 'button button-toggle-units')
-                       .on('click', function() {
-                           event.preventDefault();
-                           isImperial = !isImperial;
-                           selection.call(redraw);
-                       });
-               }
+           if (title) {
+             return title;
+           } else {
+             title = this.getAttribute('title');
+             this.removeAttribute('title');
+             this.setAttribute('data-original-title', title);

            }
 
            }
 

+           return title;
+         };

 
 

-           var panel = function(selection) {
-               selection.call(redraw);
+         var _heading = utilFunctor(null);

 
 

-               context.map()
-                   .on('drawn.info-measurement', function() {
-                       selection.call(redraw);
-                   });
+         var _keys = utilFunctor(null);

 
 

-               context
-                   .on('enter.info-measurement', function() {
-                       selection.call(redraw);
-                   });
-           };
+         tooltip.title = function (val) {
+           if (!arguments.length) return _title;
+           _title = utilFunctor(val);
+           return tooltip;
+         };

 
 

-           panel.off = function() {
-               context.map().on('drawn.info-measurement', null);
-               context.on('enter.info-measurement', null);
-           };
+         tooltip.heading = function (val) {
+           if (!arguments.length) return _heading;
+           _heading = utilFunctor(val);
+           return tooltip;
+         };
+
+         tooltip.keys = function (val) {
+           if (!arguments.length) return _keys;
+           _keys = utilFunctor(val);
+           return tooltip;
+         };

 
 

-           panel.id = 'measurement';
-           panel.title = _t('info_panels.measurement.title');
-           panel.key = _t('info_panels.measurement.key');
+         tooltip.content(function () {
+           var heading = _heading.apply(this, arguments);

 
 

+           var text = _title.apply(this, arguments);

 
 

-           return panel;
+           var keys = _keys.apply(this, arguments);
+
+           return function (selection) {
+             var headingSelect = selection.selectAll('.tooltip-heading').data(heading ? [heading] : []);
+             headingSelect.exit().remove();
+             headingSelect.enter().append('div').attr('class', 'tooltip-heading').merge(headingSelect).html(heading);
+             var textSelect = selection.selectAll('.tooltip-text').data(text ? [text] : []);
+             textSelect.exit().remove();
+             textSelect.enter().append('div').attr('class', 'tooltip-text').merge(textSelect).html(text);
+             var keyhintWrap = selection.selectAll('.keyhint-wrap').data(keys && keys.length ? [0] : []);
+             keyhintWrap.exit().remove();
+             var keyhintWrapEnter = keyhintWrap.enter().append('div').attr('class', 'keyhint-wrap');
+             keyhintWrapEnter.append('span').html(_t.html('tooltip_keyhint'));
+             keyhintWrap = keyhintWrapEnter.merge(keyhintWrap);
+             keyhintWrap.selectAll('kbd.shortcut').data(keys && keys.length ? keys : []).enter().append('kbd').attr('class', 'shortcut').html(function (d) {
+               return d;
+             });
+           };
+         });
+         return tooltip;

        }
 
        }
 

-       var uiInfoPanels = {
-           background: uiPanelBackground,
-           history: uiPanelHistory,
-           location: uiPanelLocation,
-           measurement: uiPanelMeasurement,
-       };
+       function uiEditMenu(context) {
+         var dispatch = dispatch$8('toggled');

 
 

-       function uiInfo(context) {
-           var ids = Object.keys(uiInfoPanels);
-           var wasActive = ['measurement'];
-           var panels = {};
-           var active = {};
-
-           // create panels
-           ids.forEach(function(k) {
-               if (!panels[k]) {
-                   panels[k] = uiInfoPanels[k](context);
-                   active[k] = false;
-               }
-           });
+         var _menu = select(null);

 
 

+         var _operations = []; // the position the menu should be displayed relative to

 
 

-           function info(selection) {
+         var _anchorLoc = [0, 0];
+         var _anchorLocLonLat = [0, 0]; // a string indicating how the menu was opened

 
 

-               function redraw() {
-                   var activeids = ids.filter(function(k) { return active[k]; }).sort();
+         var _triggerType = '';
+         var _vpTopMargin = 85; // viewport top margin

 
 

-                   var containers = infoPanels.selectAll('.panel-container')
-                       .data(activeids, function(k) { return k; });
+         var _vpBottomMargin = 45; // viewport bottom margin

 
 

-                   containers.exit()
-                       .style('opacity', 1)
-                       .transition()
-                       .duration(200)
-                       .style('opacity', 0)
-                       .on('end', function(d) {
-                           select(this)
-                               .call(panels[d].off)
-                               .remove();
-                       });
+         var _vpSideMargin = 35; // viewport side margin

 
 

-                   var enter = containers.enter()
-                       .append('div')
-                       .attr('class', function(d) { return 'fillD2 panel-container panel-container-' + d; });
+         var _menuTop = false;

 
 

-                   enter
-                       .style('opacity', 0)
-                       .transition()
-                       .duration(200)
-                       .style('opacity', 1);
+         var _menuHeight;

 
 

-                   var title = enter
-                       .append('div')
-                       .attr('class', 'panel-title fillD2');
+         var _menuWidth; // hardcode these values to make menu positioning easier

 
 

-                   title
-                       .append('h3')
-                       .text(function(d) { return panels[d].title; });

 
 

-                   title
-                       .append('button')
-                       .attr('class', 'close')
-                       .on('click', function (d) { info.toggle(d); })
-                       .call(svgIcon('#iD-icon-close'));
+         var _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin

 
 

-                   enter
-                       .append('div')
-                       .attr('class', function(d) { return 'panel-content panel-content-' + d; });
+         var _tooltipWidth = 210; // offset the menu slightly from the target location

 
 

+         var _menuSideMargin = 10;
+         var _tooltips = [];

 
 

-                   // redraw the panels
-                   infoPanels.selectAll('.panel-content')
-                       .each(function(d) {
-                           select(this).call(panels[d]);
-                       });
-               }
+         var editMenu = function editMenu(selection) {
+           var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');

 
 

+           var ops = _operations.filter(function (op) {
+             return !isTouchMenu || !op.mouseOnly;
+           });

 
 

-               info.toggle = function(which) {
-                   if (event) {
-                       event.stopImmediatePropagation();
-                       event.preventDefault();
-                   }
+           if (!ops.length) return;
+           _tooltips = []; // Position the menu above the anchor for stylus and finger input
+           // since the mapper's hand likely obscures the screen below the anchor

 
 

-                   var activeids = ids.filter(function(k) { return active[k]; });
+           _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips

 
 

-                   if (which) {  // toggle one
-                       active[which] = !active[which];
-                       if (activeids.length === 1 && activeids[0] === which) {  // none active anymore
-                           wasActive = [which];
-                       }
+           var showLabels = isTouchMenu;
+           var buttonHeight = showLabels ? 32 : 34;

 
 

-                       context.container().select('.' + which + '-panel-toggle-item')
-                           .classed('active', active[which])
-                           .select('input')
-                           .property('checked', active[which]);
+           if (showLabels) {
+             // Get a general idea of the width based on the length of the label
+             _menuWidth = 52 + Math.min(120, 6 * Math.max.apply(Math, ops.map(function (op) {
+               return op.title.length;
+             })));
+           } else {
+             _menuWidth = 44;
+           }

 
 

-                   } else {      // toggle all
-                       if (activeids.length) {
-                           wasActive = activeids;
-                           activeids.forEach(function(k) { active[k] = false; });
-                       } else {
-                           wasActive.forEach(function(k) { active[k] = true; });
-                       }
-                   }
+           _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
+           _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');
+
+           var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter

 
 

-                   redraw();
-               };

 
 

+           var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+             return 'edit-menu-item edit-menu-item-' + d.id;
+           }).style('height', buttonHeight + 'px').on('click', click) // don't listen for `mouseup` because we only care about non-mouse pointer types
+           .on('pointerup', pointerup).on('pointerdown mousedown', function pointerdown(d3_event) {
+             // don't let button presses also act as map input - #1869
+             d3_event.stopPropagation();
+           }).on('mouseenter.highlight', function (d3_event, d) {
+             if (!d.relatedEntityIds || select(this).classed('disabled')) return;
+             utilHighlightEntities(d.relatedEntityIds(), true, context);
+           }).on('mouseleave.highlight', function (d3_event, d) {
+             if (!d.relatedEntityIds) return;
+             utilHighlightEntities(d.relatedEntityIds(), false, context);
+           });
+           buttonsEnter.each(function (d) {
+             var tooltip = uiTooltip().heading(d.title).title(d.tooltip()).keys([d.keys[0]]);

 
 

-               var infoPanels = selection.selectAll('.info-panels')
-                   .data([0]);
+             _tooltips.push(tooltip);

 
 

-               infoPanels = infoPanels.enter()
-                   .append('div')
-                   .attr('class', 'info-panels')
-                   .merge(infoPanels);
+             select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon('#iD-operation-' + d.id, 'operation'));
+           });

 
 

-               redraw();
+           if (showLabels) {
+             buttonsEnter.append('span').attr('class', 'label').html(function (d) {
+               return d.title;
+             });
+           } // update

 
 

-               context.keybinding()
-                   .on(uiCmd('⌘' + _t('info_panels.key')), info.toggle);

 
 

-               ids.forEach(function(k) {
-                   var key = _t('info_panels.' + k + '.key', { default: null });
-                   if (!key) { return; }
-                   context.keybinding()
-                       .on(uiCmd('⌘⇧' + key), function() { info.toggle(k); });
-               });
+           buttonsEnter.merge(buttons).classed('disabled', function (d) {
+             return d.disabled();
+           });
+           updatePosition();
+           var initialScale = context.projection.scale();
+           context.map().on('move.edit-menu', function () {
+             if (initialScale !== context.projection.scale()) {
+               editMenu.close();
+             }
+           }).on('drawn.edit-menu', function (info) {
+             if (info.full) updatePosition();
+           });
+           var lastPointerUpType; // `pointerup` is always called before `click`
+
+           function pointerup(d3_event) {
+             lastPointerUpType = d3_event.pointerType;

            }
 
            }
 

-           return info;
-       }
+           function click(d3_event, operation) {
+             d3_event.stopPropagation();

 
 

-       function pointBox(loc, context) {
-           var rect = context.surfaceRect();
-           var point = context.curtainProjection(loc);
-           return {
-               left: point[0] + rect.left - 40,
-               top: point[1] + rect.top - 60,
-               width: 80,
-               height: 90
-           };
-       }
+             if (operation.relatedEntityIds) {
+               utilHighlightEntities(operation.relatedEntityIds(), false, context);
+             }

 
 

+             if (operation.disabled()) {
+               if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+                 // there are no tooltips for touch interactions so flash feedback instead
+                 context.ui().flash.duration(4000).iconName('#iD-operation-' + operation.id).iconClass('operation disabled').label(operation.tooltip)();
+               }
+             } else {
+               if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+                 context.ui().flash.duration(2000).iconName('#iD-operation-' + operation.id).iconClass('operation').label(operation.annotation() || operation.title)();
+               }

 
 

-       function pad(locOrBox, padding, context) {
-           var box;
-           if (locOrBox instanceof Array) {
-               var rect = context.surfaceRect();
-               var point = context.curtainProjection(locOrBox);
-               box = {
-                   left: point[0] + rect.left,
-                   top: point[1] + rect.top
-               };
-           } else {
-               box = locOrBox;
+               operation();
+               editMenu.close();
+             }
+
+             lastPointerUpType = null;

            }
 
            }
 

-           return {
-               left: box.left - padding,
-               top: box.top - padding,
-               width: (box.width || 0) + 2 * padding,
-               height: (box.width || 0) + 2 * padding
-           };
-       }
+           dispatch.call('toggled', this, true);
+         };

 
 

+         function updatePosition() {
+           if (!_menu || _menu.empty()) return;
+           var anchorLoc = context.projection(_anchorLocLonLat);
+           var viewport = context.surfaceRect();

 
 

-       function icon(name, svgklass, useklass) {
-           return '<svg class="icon ' + (svgklass || '') + '">' +
-                '<use xlink:href="' + name + '"' +
-                (useklass ? ' class="' + useklass + '"' : '') + '></use></svg>';
-       }
+           if (anchorLoc[0] < 0 || anchorLoc[0] > viewport.width || anchorLoc[1] < 0 || anchorLoc[1] > viewport.height) {
+             // close the menu if it's gone offscreen
+             editMenu.close();
+             return;
+           }

 
 

-       var helpStringReplacements;
+           var menuLeft = displayOnLeft(viewport);
+           var offset = [0, 0];
+           offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;

 
 

-       // Returns the localized string for `id` with a standardized set of icon, key, and
-       // label replacements suitable for tutorials and documentation. Optionally supplemented
-       // with custom `replacements`
-       function helpString(id, replacements) {
-           // only load these the first time
-           if (!helpStringReplacements) { helpStringReplacements = {
-               // insert icons corresponding to various UI elements
-               point_icon: icon('#iD-icon-point', 'pre-text'),
-               line_icon: icon('#iD-icon-line', 'pre-text'),
-               area_icon: icon('#iD-icon-area', 'pre-text'),
-               note_icon: icon('#iD-icon-note', 'pre-text add-note'),
-               plus: icon('#iD-icon-plus', 'pre-text'),
-               minus: icon('#iD-icon-minus', 'pre-text'),
-               move_icon: icon('#iD-operation-move', 'pre-text operation'),
-               merge_icon: icon('#iD-operation-merge', 'pre-text operation'),
-               delete_icon: icon('#iD-operation-delete', 'pre-text operation'),
-               circularize_icon: icon('#iD-operation-circularize', 'pre-text operation'),
-               split_icon: icon('#iD-operation-split', 'pre-text operation'),
-               orthogonalize_icon: icon('#iD-operation-orthogonalize', 'pre-text operation'),
-               disconnect_icon: icon('#iD-operation-disconnect', 'pre-text operation'),
-               layers_icon: icon('#iD-icon-layers', 'pre-text'),
-               data_icon: icon('#iD-icon-data', 'pre-text'),
-               inspect: icon('#iD-icon-inspect', 'pre-text'),
-               help_icon: icon('#iD-icon-help', 'pre-text'),
-               undo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo', 'pre-text'),
-               redo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-undo' : '#iD-icon-redo', 'pre-text'),
-               save_icon: icon('#iD-icon-save', 'pre-text'),
-               leftclick: icon('#iD-walkthrough-mouse-left', 'pre-text operation'),
-               rightclick: icon('#iD-walkthrough-mouse-right', 'pre-text operation'),
-               mousewheel_icon: icon('#iD-walkthrough-mousewheel', 'pre-text operation'),
-               tap_icon: icon('#iD-walkthrough-tap', 'pre-text operation'),
-               doubletap_icon: icon('#iD-walkthrough-doubletap', 'pre-text operation'),
-               longpress_icon: icon('#iD-walkthrough-longpress', 'pre-text operation'),
-               touchdrag_icon: icon('#iD-walkthrough-touchdrag', 'pre-text operation'),
-               pinch_icon: icon('#iD-walkthrough-pinch-apart', 'pre-text operation'),
-
-               // insert keys; may be localized and platform-dependent
-               shift: uiCmd.display('⇧'),
-               alt: uiCmd.display('⌥'),
-               return: uiCmd.display('↵'),
-               esc: _t('shortcuts.key.esc'),
-               space: _t('shortcuts.key.space'),
-               add_note_key: _t('modes.add_note.key'),
-               help_key: _t('help.key'),
-               shortcuts_key: _t('shortcuts.toggle.key'),
-
-               // reference localized UI labels directly so that they'll always match
-               save: _t('save.title'),
-               undo: _t('undo.title'),
-               redo: _t('redo.title'),
-               upload: _t('commit.save'),
-               point: _t('modes.add_point.title'),
-               line: _t('modes.add_line.title'),
-               area: _t('modes.add_area.title'),
-               note: _t('modes.add_note.label'),
-               delete: _t('operations.delete.title'),
-               move: _t('operations.move.title'),
-               orthogonalize: _t('operations.orthogonalize.title'),
-               circularize: _t('operations.circularize.title'),
-               merge: _t('operations.merge.title'),
-               disconnect: _t('operations.disconnect.title'),
-               split: _t('operations.split.title'),
-               map_data: _t('map_data.title'),
-               osm_notes: _t('map_data.layers.notes.title'),
-               fields: _t('inspector.fields'),
-               tags: _t('inspector.tags'),
-               relations: _t('inspector.relations'),
-               new_relation: _t('inspector.new_relation'),
-               turn_restrictions: _t('presets.fields.restrictions.label'),
-               background_settings: _t('background.description'),
-               imagery_offset: _t('background.fix_misalignment'),
-               start_the_walkthrough: _t('splash.walkthrough'),
-               help: _t('help.title'),
-               ok: _t('intro.ok')
-           }; }
-
-           var reps;
-           if (replacements) {
-               reps = Object.assign(replacements, helpStringReplacements);
+           if (_menuTop) {
+             if (anchorLoc[1] - _menuHeight < _vpTopMargin) {
+               // menu is near top viewport edge, shift downward
+               offset[1] = -anchorLoc[1] + _vpTopMargin;
+             } else {
+               offset[1] = -_menuHeight;
+             }

            } else {
            } else {

-               reps = helpStringReplacements;
+             if (anchorLoc[1] + _menuHeight > viewport.height - _vpBottomMargin) {
+               // menu is near bottom viewport edge, shift upwards
+               offset[1] = -anchorLoc[1] - _menuHeight + viewport.height - _vpBottomMargin;
+             } else {
+               offset[1] = 0;
+             }

            }
 
            }
 

-           return _t(id, reps)
-                // use keyboard key styling for shortcuts
-               .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
-       }
+           var origin = geoVecAdd(anchorLoc, offset);

 
 

+           _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');

 
 

-       function slugify(text) {
-           return text.toString().toLowerCase()
-               .replace(/\s+/g, '-')           // Replace spaces with -
-               .replace(/[^\w\-]+/g, '')       // Remove all non-word chars
-               .replace(/\-\-+/g, '-')         // Replace multiple - with single -
-               .replace(/^-+/, '')             // Trim - from start of text
-               .replace(/-+$/, '');            // Trim - from end of text
-       }
+           var tooltipSide = tooltipPosition(viewport, menuLeft);

 
 

+           _tooltips.forEach(function (tooltip) {
+             tooltip.placement(tooltipSide);
+           });

 
 

-       // console warning for missing walkthrough names
-       var missingStrings = {};
-       function checkKey(key, text) {
-           if (_t(key, { default: undefined}) === undefined) {
-               if (missingStrings.hasOwnProperty(key)) { return; }  // warn once
-               missingStrings[key] = text;
-               var missing = key + ': ' + text;
-               if (typeof console !== 'undefined') { console.log(missing); } // eslint-disable-line
-           }
-       }
+           function displayOnLeft(viewport) {
+             if (_mainLocalizer.textDirection() === 'ltr') {
+               if (anchorLoc[0] + _menuSideMargin + _menuWidth > viewport.width - _vpSideMargin) {
+                 // right menu would be too close to the right viewport edge, go left
+                 return true;
+               } // prefer right menu

 
 
 
 

-       function localize(obj) {
-           var key;
+               return false;
+             } else {
+               // rtl
+               if (anchorLoc[0] - _menuSideMargin - _menuWidth < _vpSideMargin) {
+                 // left menu would be too close to the left viewport edge, go right
+                 return false;
+               } // prefer left menu

 
 

-           // Assign name if entity has one..
-           var name = obj.tags && obj.tags.name;
-           if (name) {
-               key = 'intro.graph.name.' + slugify(name);
-               obj.tags.name = _t(key, { default: name });
-               checkKey(key, name);
-           }
-
-           // Assign street name if entity has one..
-           var street = obj.tags && obj.tags['addr:street'];
-           if (street) {
-               key = 'intro.graph.name.' + slugify(street);
-               obj.tags['addr:street'] = _t(key, { default: street });
-               checkKey(key, street);
-
-               // Add address details common across walkthrough..
-               var addrTags = [
-                   'block_number', 'city', 'county', 'district', 'hamlet', 'neighbourhood',
-                   'postcode', 'province', 'quarter', 'state', 'subdistrict', 'suburb'
-               ];
-               addrTags.forEach(function(k) {
-                   var key = 'intro.graph.' + k;
-                   var tag = 'addr:' + k;
-                   var val = obj.tags && obj.tags[tag];
-                   var str = _t(key, { default: val });
-
-                   if (str) {
-                       if (str.match(/^<.*>$/) !== null) {
-                           delete obj.tags[tag];
-                       } else {
-                           obj.tags[tag] = str;
-                       }
-                   }
-               });
-           }

 
 

-           return obj;
-       }
+               return true;
+             }
+           }

 
 

+           function tooltipPosition(viewport, menuLeft) {
+             if (_mainLocalizer.textDirection() === 'ltr') {
+               if (menuLeft) {
+                 // if there's not room for a right-side menu then there definitely
+                 // isn't room for right-side tooltips
+                 return 'left';
+               }

 
 

-       // Used to detect squareness.. some duplicataion of code from actionOrthogonalize.
-       function isMostlySquare(points) {
-           // note: uses 15 here instead of the 12 from actionOrthogonalize because
-           // actionOrthogonalize can actually straighten some larger angles as it iterates
-           var threshold = 15; // degrees within right or straight
-           var lowerBound = Math.cos((90 - threshold) * Math.PI / 180);  // near right
-           var upperBound = Math.cos(threshold * Math.PI / 180);         // near straight
+               if (anchorLoc[0] + _menuSideMargin + _menuWidth + _tooltipWidth > viewport.width - _vpSideMargin) {
+                 // right tooltips would be too close to the right viewport edge, go left
+                 return 'left';
+               } // prefer right tooltips

 
 

-           for (var i = 0; i < points.length; i++) {
-               var a = points[(i - 1 + points.length) % points.length];
-               var origin = points[i];
-               var b = points[(i + 1) % points.length];

 
 

-               var dotp = geoVecNormalizedDot(a, b, origin);
-               var mag = Math.abs(dotp);
-               if (mag > lowerBound && mag < upperBound) {
-                   return false;
+               return 'right';
+             } else {
+               // rtl
+               if (!menuLeft) {
+                 return 'right';

                }
                }

+
+               if (anchorLoc[0] - _menuSideMargin - _menuWidth - _tooltipWidth < _vpSideMargin) {
+                 // left tooltips would be too close to the left viewport edge, go right
+                 return 'right';
+               } // prefer left tooltips
+
+
+               return 'left';
+             }

            }
            }

+         }

 
 

-           return true;
-       }
+         editMenu.close = function () {
+           context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);

 
 

+           _menu.remove();

 
 

-       function selectMenuItem(context, operation) {
-           return context.container().select('.edit-menu .edit-menu-item-' + operation);
-       }
+           _tooltips = [];
+           dispatch.call('toggled', this, false);
+         };

 
 

+         editMenu.anchorLoc = function (val) {
+           if (!arguments.length) return _anchorLoc;
+           _anchorLoc = val;
+           _anchorLocLonLat = context.projection.invert(_anchorLoc);
+           return editMenu;
+         };

 
 

-       function transitionTime(point1, point2) {
-           var distance = geoSphericalDistance(point1, point2);
-           if (distance === 0)
-               { return 0; }
-           else if (distance < 80)
-               { return 500; }
-           else
-               { return 1000; }
-       }
+         editMenu.triggerType = function (val) {
+           if (!arguments.length) return _triggerType;
+           _triggerType = val;
+           return editMenu;
+         };

 
 

-       // Tooltips and svg mask used to highlight certain features
-       function uiCurtain(containerNode) {
+         editMenu.operations = function (val) {
+           if (!arguments.length) return _operations;
+           _operations = val;
+           return editMenu;
+         };

 
 

-           var surface = select(null),
-               tooltip = select(null),
-               darkness = select(null);
+         return utilRebind(editMenu, dispatch, 'on');
+       }

 
 

-           function curtain(selection) {
-               surface = selection
-                   .append('svg')
-                   .attr('class', 'curtain')
-                   .style('top', 0)
-                   .style('left', 0);
+       function uiFeatureInfo(context) {
+         function update(selection) {
+           var features = context.features();
+           var stats = features.stats();
+           var count = 0;
+           var hiddenList = features.hidden().map(function (k) {
+             if (stats[k]) {
+               count += stats[k];
+               return _t('inspector.title_count', {
+                 title: _t.html('feature.' + k + '.description'),
+                 count: stats[k]
+               });
+             }

 
 

-               darkness = surface.append('path')
-                   .attr('x', 0)
-                   .attr('y', 0)
-                   .attr('class', 'curtain-darkness');
+             return null;
+           }).filter(Boolean);
+           selection.html('');

 
 

-               select(window).on('resize.curtain', resize);
+           if (hiddenList.length) {
+             var tooltipBehavior = uiTooltip().placement('top').title(function () {
+               return hiddenList.join('<br/>');
+             });
+             selection.append('a').attr('class', 'chip').attr('href', '#').html(_t.html('feature_info.hidden_warning', {
+               count: count
+             })).call(tooltipBehavior).on('click', function (d3_event) {
+               tooltipBehavior.hide();
+               d3_event.preventDefault(); // open the Map Data pane

 
 

-               tooltip = selection.append('div')
-                   .attr('class', 'tooltip');
+               context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
+             });
+           }

 
 

-               tooltip
-                   .append('div')
-                   .attr('class', 'popover-arrow');
+           selection.classed('hide', !hiddenList.length);
+         }

 
 

-               tooltip
-                   .append('div')
-                   .attr('class', 'popover-inner');
+         return function (selection) {
+           update(selection);
+           context.features().on('change.feature_info', function () {
+             update(selection);
+           });
+         };
+       }

 
 

-               resize();
+       function uiFlash(context) {
+         var _flashTimer;
+
+         var _duration = 2000;
+         var _iconName = '#iD-icon-no';
+         var _iconClass = 'disabled';
+         var _label = '';
+
+         function flash() {
+           if (_flashTimer) {
+             _flashTimer.stop();
+           }
+
+           context.container().select('.main-footer-wrap').classed('footer-hide', true).classed('footer-show', false);
+           context.container().select('.flash-wrap').classed('footer-hide', false).classed('footer-show', true);
+           var content = context.container().select('.flash-wrap').selectAll('.flash-content').data([0]); // Enter
+
+           var contentEnter = content.enter().append('div').attr('class', 'flash-content');
+           var iconEnter = contentEnter.append('svg').attr('class', 'flash-icon icon').append('g').attr('transform', 'translate(10,10)');
+           iconEnter.append('circle').attr('r', 9);
+           iconEnter.append('use').attr('transform', 'translate(-7,-7)').attr('width', '14').attr('height', '14');
+           contentEnter.append('div').attr('class', 'flash-text'); // Update
+
+           content = content.merge(contentEnter);
+           content.selectAll('.flash-icon').attr('class', 'icon flash-icon ' + (_iconClass || ''));
+           content.selectAll('.flash-icon use').attr('xlink:href', _iconName);
+           content.selectAll('.flash-text').attr('class', 'flash-text').html(_label);
+           _flashTimer = d3_timeout(function () {
+             _flashTimer = null;
+             context.container().select('.main-footer-wrap').classed('footer-hide', false).classed('footer-show', true);
+             context.container().select('.flash-wrap').classed('footer-hide', true).classed('footer-show', false);
+           }, _duration);
+           return content;
+         }
+
+         flash.duration = function (_) {
+           if (!arguments.length) return _duration;
+           _duration = _;
+           return flash;
+         };

 
 

+         flash.label = function (_) {
+           if (!arguments.length) return _label;
+           _label = _;
+           return flash;
+         };

 
 

-               function resize() {
-                   surface
-                       .attr('width', containerNode.clientWidth)
-                       .attr('height', containerNode.clientHeight);
-                   curtain.cut(darkness.datum());
-               }
-           }
+         flash.iconName = function (_) {
+           if (!arguments.length) return _iconName;
+           _iconName = _;
+           return flash;
+         };

 
 

+         flash.iconClass = function (_) {
+           if (!arguments.length) return _iconClass;
+           _iconClass = _;
+           return flash;
+         };

 
 

-           /**
-            * Reveal cuts the curtain to highlight the given box,
-            * and shows a tooltip with instructions next to the box.
-            *
-            * @param  {String|ClientRect} [box]   box used to cut the curtain
-            * @param  {String}    [text]          text for a tooltip
-            * @param  {Object}    [options]
-            * @param  {string}    [options.tooltipClass]    optional class to add to the tooltip
-            * @param  {integer}   [options.duration]        transition time in milliseconds
-            * @param  {string}    [options.buttonText]      if set, create a button with this text label
-            * @param  {function}  [options.buttonCallback]  if set, the callback for the button
-            * @param  {function}  [options.padding]         extra margin in px to put around bbox
-            * @param  {String|ClientRect} [options.tooltipBox]  box for tooltip position, if different from box for the curtain
-            */
-           curtain.reveal = function(box, text, options) {
-               options = options || {};
-
-               if (typeof box === 'string') {
-                   box = select(box).node();
-               }
-               if (box && box.getBoundingClientRect) {
-                   box = copyBox(box.getBoundingClientRect());
-                   var containerRect = containerNode.getBoundingClientRect();
-                   box.top -= containerRect.top;
-                   box.left -= containerRect.left;
-               }
-               if (box && options.padding) {
-                   box.top -= options.padding;
-                   box.left -= options.padding;
-                   box.bottom += options.padding;
-                   box.right += options.padding;
-                   box.height += options.padding * 2;
-                   box.width += options.padding * 2;
-               }
-
-               var tooltipBox;
-               if (options.tooltipBox) {
-                   tooltipBox = options.tooltipBox;
-                   if (typeof tooltipBox === 'string') {
-                       tooltipBox = select(tooltipBox).node();
-                   }
-                   if (tooltipBox && tooltipBox.getBoundingClientRect) {
-                       tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
-                   }
-               } else {
-                   tooltipBox = box;
-               }
+         return flash;
+       }

 
 

-               if (tooltipBox && text) {
-                   // pseudo markdown bold text for the instruction section..
-                   var parts = text.split('**');
-                   var html = parts[0] ? '<span>' + parts[0] + '</span>' : '';
-                   if (parts[1]) {
-                       html += '<span class="instruction">' + parts[1] + '</span>';
-                   }
+       function uiFullScreen(context) {
+         var element = context.container().node(); // var button = d3_select(null);

 
 

-                   html = html.replace(/\*(.*?)\*/g, '<em>$1</em>');   // emphasis
-                   html = html.replace(/\{br\}/g, '<br/><br/>');       // linebreak
+         function getFullScreenFn() {
+           if (element.requestFullscreen) {
+             return element.requestFullscreen;
+           } else if (element.msRequestFullscreen) {
+             return element.msRequestFullscreen;
+           } else if (element.mozRequestFullScreen) {
+             return element.mozRequestFullScreen;
+           } else if (element.webkitRequestFullscreen) {
+             return element.webkitRequestFullscreen;
+           }
+         }

 
 

-                   if (options.buttonText && options.buttonCallback) {
-                       html += '<div class="button-section">' +
-                           '<button href="#" class="button action">' + options.buttonText + '</button></div>';
-                   }
+         function getExitFullScreenFn() {
+           if (document.exitFullscreen) {
+             return document.exitFullscreen;
+           } else if (document.msExitFullscreen) {
+             return document.msExitFullscreen;
+           } else if (document.mozCancelFullScreen) {
+             return document.mozCancelFullScreen;
+           } else if (document.webkitExitFullscreen) {
+             return document.webkitExitFullscreen;
+           }
+         }

 
 

-                   var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
-                   tooltip
-                       .classed(classes, true)
-                       .selectAll('.popover-inner')
-                       .html(html);
-
-                   if (options.buttonText && options.buttonCallback) {
-                       var button = tooltip.selectAll('.button-section .button.action');
-                       button
-                           .on('click', function() {
-                               event.preventDefault();
-                               options.buttonCallback();
-                           });
-                   }
+         function isFullScreen() {
+           return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
+         }

 
 

-                   var tip = copyBox(tooltip.node().getBoundingClientRect()),
-                       w = containerNode.clientWidth,
-                       h = containerNode.clientHeight,
-                       tooltipWidth = 200,
-                       tooltipArrow = 5,
-                       side, pos;
+         function isSupported() {
+           return !!getFullScreenFn();
+         }

 
 

+         function fullScreen(d3_event) {
+           d3_event.preventDefault();

 
 

-                   // hack: this will have bottom placement,
-                   // so need to reserve extra space for the tooltip illustration.
-                   if (options.tooltipClass === 'intro-mouse') {
-                       tip.height += 80;
-                   }
+           if (!isFullScreen()) {
+             // button.classed('active', true);
+             getFullScreenFn().apply(element);
+           } else {
+             // button.classed('active', false);
+             getExitFullScreenFn().apply(document);
+           }
+         }

 
 

-                   // trim box dimensions to just the portion that fits in the container..
-                   if (tooltipBox.top + tooltipBox.height > h) {
-                       tooltipBox.height -= (tooltipBox.top + tooltipBox.height - h);
-                   }
-                   if (tooltipBox.left + tooltipBox.width > w) {
-                       tooltipBox.width -= (tooltipBox.left + tooltipBox.width - w);
-                   }
+         return function () {
+           // selection) {
+           if (!isSupported()) return; // button = selection.append('button')
+           //     .attr('title', t('full_screen'))
+           //     .on('click', fullScreen)
+           //     .call(tooltip);
+           // button.append('span')
+           //     .attr('class', 'icon full-screen');

 
 

-                   // determine tooltip placement..
+           var detected = utilDetect();
+           var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
+           context.keybinding().on(keys, fullScreen);
+         };
+       }

 
 

-                   if (tooltipBox.top + tooltipBox.height < 100) {
-                       // tooltip below box..
-                       side = 'bottom';
-                       pos = [
-                           tooltipBox.left + tooltipBox.width / 2 - tip.width / 2,
-                           tooltipBox.top + tooltipBox.height
-                       ];
+       function uiGeolocate(context) {
+         var _geolocationOptions = {
+           // prioritize speed and power usage over precision
+           enableHighAccuracy: false,
+           // don't hang indefinitely getting the location
+           timeout: 6000 // 6sec

 
 

-                   } else if (tooltipBox.top > h - 140) {
-                       // tooltip above box..
-                       side = 'top';
-                       pos = [
-                           tooltipBox.left + tooltipBox.width / 2 - tip.width / 2,
-                           tooltipBox.top - tip.height
-                       ];
+         };

 
 

-                   } else {
-                       // tooltip to the side of the tooltipBox..
-                       var tipY = tooltipBox.top + tooltipBox.height / 2 - tip.height / 2;
+         var _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);

 
 

-                       if (_mainLocalizer.textDirection() === 'rtl') {
-                           if (tooltipBox.left - tooltipWidth - tooltipArrow < 70) {
-                               side = 'right';
-                               pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+         var _layer = context.layers().layer('geolocate');

 
 

-                           } else {
-                               side = 'left';
-                               pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
-                           }
+         var _position;

 
 

-                       } else {
-                           if (tooltipBox.left + tooltipBox.width + tooltipArrow + tooltipWidth > w - 70) {
-                               side = 'left';
-                               pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
-                           }
-                           else {
-                               side = 'right';
-                               pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
-                           }
-                       }
-                   }
+         var _extent;

 
 

-                   if (options.duration !== 0 || !tooltip.classed(side)) {
-                       tooltip.call(uiToggle(true));
-                   }
+         var _timeoutID;

 
 

-                   tooltip
-                       .style('top', pos[1] + 'px')
-                       .style('left', pos[0] + 'px')
-                       .attr('class', classes + ' ' + side);
+         var _button = select(null);

 
 

+         function click() {
+           if (context.inIntro()) return;

 
 

-                   // shift popover-inner if it is very close to the top or bottom edge
-                   // (doesn't affect the placement of the popover-arrow)
-                   var shiftY = 0;
-                   if (side === 'left' || side === 'right') {
-                       if (pos[1] < 60) {
-                           shiftY = 60 - pos[1];
-                       }
-                       else if (pos[1] + tip.height > h - 100) {
-                           shiftY = h - pos[1] - tip.height - 100;
-                       }
-                   }
-                   tooltip.selectAll('.popover-inner')
-                       .style('top', shiftY + 'px');
+           if (!_layer.enabled() && !_locating.isShown()) {
+             // This timeout ensures that we still call finish() even if
+             // the user declines to share their location in Firefox
+             _timeoutID = setTimeout(error, 10000
+             /* 10sec */
+             );
+             context.container().call(_locating); // get the latest position even if we already have one

 
 

-               } else {
-                   tooltip
-                       .classed('in', false)
-                       .call(uiToggle(false));
-               }
+             navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
+           } else {
+             _locating.close();

 
 

-               curtain.cut(box, options.duration);
+             _layer.enabled(null, false);

 
 

-               return tooltip;
-           };
+             updateButtonState();
+           }
+         }

 
 

+         function zoomTo() {
+           context.enter(modeBrowse(context));
+           var map = context.map();

 
 

-           curtain.cut = function(datum, duration) {
-               darkness.datum(datum)
-                   .interrupt();
+           _layer.enabled(_position, true);

 
 

-               var selection;
-               if (duration === 0) {
-                   selection = darkness;
-               } else {
-                   selection = darkness
-                       .transition()
-                       .duration(duration || 600)
-                       .ease(linear$1);
-               }
-
-               selection
-                   .attr('d', function(d) {
-                       var containerWidth = containerNode.clientWidth;
-                       var containerHeight = containerNode.clientHeight;
-                       var string = 'M 0,0 L 0,' + containerHeight + ' L ' +
-                           containerWidth + ',' + containerHeight + 'L' +
-                           containerWidth + ',0 Z';
-
-                       if (!d) { return string; }
-                       return string + 'M' +
-                           d.left + ',' + d.top + 'L' +
-                           d.left + ',' + (d.top + d.height) + 'L' +
-                           (d.left + d.width) + ',' + (d.top + d.height) + 'L' +
-                           (d.left + d.width) + ',' + (d.top) + 'Z';
+           updateButtonState();
+           map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
+         }

 
 

-                   });
-           };
+         function success(geolocation) {
+           _position = geolocation;
+           var coords = _position.coords;
+           _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
+           zoomTo();
+           finish();
+         }
+
+         function error() {
+           if (_position) {
+             // use the position from a previous call if we have one
+             zoomTo();
+           } else {
+             context.ui().flash.label(_t.html('geolocate.location_unavailable')).iconName('#iD-icon-geolocate')();
+           }

 
 

+           finish();
+         }

 
 

-           curtain.remove = function() {
-               surface.remove();
-               tooltip.remove();
-               select(window).on('resize.curtain', null);
-           };
+         function finish() {
+           _locating.close(); // unblock ui

 
 
 
 

-           // ClientRects are immutable, so copy them to an object,
-           // in case we need to trim the height/width.
-           function copyBox(src) {
-               return {
-                   top: src.top,
-                   right: src.right,
-                   bottom: src.bottom,
-                   left: src.left,
-                   width: src.width,
-                   height: src.height
-               };
+           if (_timeoutID) {
+             clearTimeout(_timeoutID);

            }
 
            }
 

+           _timeoutID = undefined;
+         }
+
+         function updateButtonState() {
+           _button.classed('active', _layer.enabled());
+         }

 
 

-           return curtain;
+         return function (selection) {
+           if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) return;
+           _button = selection.append('button').on('click', click).call(svgIcon('#iD-icon-geolocate', 'light')).call(uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_t.html('geolocate.title')).keys([_t('geolocate.key')]));
+           context.keybinding().on(_t('geolocate.key'), click);
+         };

        }
 
        }
 

-       function uiIntroWelcome(context, reveal) {
-           var dispatch$1 = dispatch('done');
+       function uiPanelBackground(context) {
+         var background = context.background();
+         var _currSourceName = null;
+         var _metadata = {};
+         var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];

 
 

-           var chapter = {
-               title: 'intro.welcome.title'
-           };
+         var debouncedRedraw = debounce(redraw, 250);

 
 

+         function redraw(selection) {
+           var source = background.baseLayerSource();
+           if (!source) return;
+           var isDG = source.id.match(/^DigitalGlobe/i) !== null;
+           var sourceLabel = source.label();

 
 

-           function welcome() {
-               context.map().centerZoom([-85.63591, 41.94285], 19);
-               reveal('.intro-nav-wrap .chapter-welcome',
-                   helpString('intro.welcome.welcome'),
-                   { buttonText: _t('intro.ok'), buttonCallback: practice }
-               );
+           if (_currSourceName !== sourceLabel) {
+             _currSourceName = sourceLabel;
+             _metadata = {};

            }
 
            }
 

-           function practice() {
-               reveal('.intro-nav-wrap .chapter-welcome',
-                   helpString('intro.welcome.practice'),
-                   { buttonText: _t('intro.ok'), buttonCallback: words }
-               );
-           }
+           selection.html('');
+           var list = selection.append('ul').attr('class', 'background-info');
+           list.append('li').html(_currSourceName);
+
+           _metadataKeys.forEach(function (k) {
+             // DigitalGlobe vintage is available in raster layers for now.
+             if (isDG && k === 'vintage') return;
+             list.append('li').attr('class', 'background-info-list-' + k).classed('hide', !_metadata[k]).html(_t.html('info_panels.background.' + k) + ':').append('span').attr('class', 'background-info-span-' + k).html(_metadata[k]);
+           });
+
+           debouncedGetMetadata(selection);
+           var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
+           selection.append('a').html(_t.html('info_panels.background.' + toggleTiles)).attr('href', '#').attr('class', 'button button-toggle-tiles').on('click', function (d3_event) {
+             d3_event.preventDefault();
+             context.setDebug('tile', !context.getDebug('tile'));
+             selection.call(redraw);
+           });
+
+           if (isDG) {
+             var key = source.id + '-vintage';
+             var sourceVintage = context.background().findSource(key);
+             var showsVintage = context.background().showsLayer(sourceVintage);
+             var toggleVintage = showsVintage ? 'hide_vintage' : 'show_vintage';
+             selection.append('a').html(_t.html('info_panels.background.' + toggleVintage)).attr('href', '#').attr('class', 'button button-toggle-vintage').on('click', function (d3_event) {
+               d3_event.preventDefault();
+               context.background().toggleOverlayLayer(sourceVintage);
+               selection.call(redraw);
+             });
+           } // disable if necessary
+

 
 

-           function words() {
-               reveal('.intro-nav-wrap .chapter-welcome',
-                   helpString('intro.welcome.words'),
-                   { buttonText: _t('intro.ok'), buttonCallback: chapters }
-               );
-           }
+           ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function (layerId) {
+             if (source.id !== layerId) {
+               var key = layerId + '-vintage';
+               var sourceVintage = context.background().findSource(key);

 
 

+               if (context.background().showsLayer(sourceVintage)) {
+                 context.background().toggleOverlayLayer(sourceVintage);
+               }
+             }
+           });
+         }

 
 

-           function chapters() {
-               dispatch$1.call('done');
-               reveal('.intro-nav-wrap .chapter-navigation',
-                   helpString('intro.welcome.chapters', { next: _t('intro.navigation.title') })
-               );
-           }
+         var debouncedGetMetadata = debounce(getMetadata, 250);

 
 

+         function getMetadata(selection) {
+           var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center

 
 

-           chapter.enter = function() {
-               welcome();
-           };
+           if (tile.empty()) return;
+           var sourceName = _currSourceName;
+           var d = tile.datum();
+           var zoom = d && d.length >= 3 && d[2] || Math.floor(context.map().zoom());
+           var center = context.map().center(); // update zoom

 
 

+           _metadata.zoom = String(zoom);
+           selection.selectAll('.background-info-list-zoom').classed('hide', false).selectAll('.background-info-span-zoom').html(_metadata.zoom);
+           if (!d || !d.length >= 3) return;
+           background.baseLayerSource().getMetadata(center, d, function (err, result) {
+             if (err || _currSourceName !== sourceName) return; // update vintage

 
 

-           chapter.exit = function() {
-               context.container().select('.curtain-tooltip.intro-mouse')
-                   .selectAll('.counter')
-                   .remove();
-           };
+             var vintage = result.vintage;
+             _metadata.vintage = vintage && vintage.range || _t('info_panels.background.unknown');
+             selection.selectAll('.background-info-list-vintage').classed('hide', false).selectAll('.background-info-span-vintage').html(_metadata.vintage); // update other _metadata

 
 

+             _metadataKeys.forEach(function (k) {
+               if (k === 'zoom' || k === 'vintage') return; // done already

 
 

-           chapter.restart = function() {
-               chapter.exit();
-               chapter.enter();
-           };
+               var val = result[k];
+               _metadata[k] = val;
+               selection.selectAll('.background-info-list-' + k).classed('hide', !val).selectAll('.background-info-span-' + k).html(val);
+             });
+           });
+         }
+
+         var panel = function panel(selection) {
+           selection.call(redraw);
+           context.map().on('drawn.info-background', function () {
+             selection.call(debouncedRedraw);
+           }).on('move.info-background', function () {
+             selection.call(debouncedGetMetadata);
+           });
+         };

 
 

+         panel.off = function () {
+           context.map().on('drawn.info-background', null).on('move.info-background', null);
+         };

 
 

-           return utilRebind(chapter, dispatch$1, 'on');
+         panel.id = 'background';
+         panel.label = _t.html('info_panels.background.title');
+         panel.key = _t('info_panels.background.key');
+         return panel;

        }
 
        }
 

-       function uiIntroNavigation(context, reveal) {
-           var dispatch$1 = dispatch('done');
-           var timeouts = [];
-           var hallId = 'n2061';
-           var townHall = [-85.63591, 41.94285];
-           var springStreetId = 'w397';
-           var springStreetEndId = 'n1834';
-           var springStreet = [-85.63582, 41.94255];
-           var onewayField = _mainPresetIndex.field('oneway');
-           var maxspeedField = _mainPresetIndex.field('maxspeed');
-
-
-           var chapter = {
-               title: 'intro.navigation.title'
-           };
+       function uiPanelHistory(context) {
+         var osm;

 
 

+         function displayTimestamp(timestamp) {
+           if (!timestamp) return _t('info_panels.history.unknown');
+           var options = {
+             day: 'numeric',
+             month: 'short',
+             year: 'numeric',
+             hour: 'numeric',
+             minute: 'numeric',
+             second: 'numeric'
+           };
+           var d = new Date(timestamp);
+           if (isNaN(d.getTime())) return _t('info_panels.history.unknown');
+           return d.toLocaleString(_mainLocalizer.localeCode(), options);
+         }

 
 

-           function timeout(f, t) {
-               timeouts.push(window.setTimeout(f, t));
+         function displayUser(selection, userName) {
+           if (!userName) {
+             selection.append('span').html(_t.html('info_panels.history.unknown'));
+             return;

            }
 
            }
 

+           selection.append('span').attr('class', 'user-name').html(userName);
+           var links = selection.append('div').attr('class', 'links');

 
 

-           function eventCancel() {
-               event.stopPropagation();
-               event.preventDefault();
+           if (osm) {
+             links.append('a').attr('class', 'user-osm-link').attr('href', osm.userURL(userName)).attr('target', '_blank').html('OSM');

            }
 
            }
 

+           links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).html('HDYC');
+         }

 
 

-           function isTownHallSelected() {
-               var ids = context.selectedIDs();
-               return ids.length === 1 && ids[0] === hallId;
+         function displayChangeset(selection, changeset) {
+           if (!changeset) {
+             selection.append('span').html(_t.html('info_panels.history.unknown'));
+             return;

            }
 
            }
 

+           selection.append('span').attr('class', 'changeset-id').html(changeset);
+           var links = selection.append('div').attr('class', 'links');

 
 

-           function dragMap() {
-               context.enter(modeBrowse(context));
-               context.history().reset('initial');
-
-               var msec = transitionTime(townHall, context.map().center());
-               if (msec) { reveal(null, null, { duration: 0 }); }
-               context.map().centerZoomEase(townHall, 19, msec);
-
-               timeout(function() {
-                   var centerStart = context.map().center();
+           if (osm) {
+             links.append('a').attr('class', 'changeset-osm-link').attr('href', osm.changesetURL(changeset)).attr('target', '_blank').html('OSM');
+           }

 
 

-                   var textId = context.lastPointerType() === 'mouse' ? 'drag' : 'drag_touch';
-                   var dragString = helpString('intro.navigation.map_info') + '{br}' + helpString('intro.navigation.' + textId);
-                   reveal('.surface', dragString);
-                   context.map().on('drawn.intro', function() {
-                       reveal('.surface', dragString, { duration: 0 });
-                   });
+           links.append('a').attr('class', 'changeset-osmcha-link').attr('href', 'https://osmcha.org/changesets/' + changeset).attr('target', '_blank').html('OSMCha');
+           links.append('a').attr('class', 'changeset-achavi-link').attr('href', 'https://overpass-api.de/achavi/?changeset=' + changeset).attr('target', '_blank').html('Achavi');
+         }

 
 

-                   context.map().on('move.intro', function() {
-                       var centerNow = context.map().center();
-                       if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
-                           context.map().on('move.intro', null);
-                           timeout(function() { continueTo(zoomMap); }, 3000);
-                       }
-                   });
+         function redraw(selection) {
+           var selectedNoteID = context.selectedNoteID();
+           osm = context.connection();
+           var selected, note, entity;

 
 

-               }, msec + 100);
+           if (selectedNoteID && osm) {
+             // selected 1 note
+             selected = [_t('note.note') + ' ' + selectedNoteID];
+             note = osm.getNote(selectedNoteID);
+           } else {
+             // selected 1..n entities
+             selected = context.selectedIDs().filter(function (e) {
+               return context.hasEntity(e);
+             });

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   nextStep();
-               }
+             if (selected.length) {
+               entity = context.entity(selected[0]);
+             }

            }
 
            }
 

+           var singular = selected.length === 1 ? selected[0] : null;
+           selection.html('');
+           selection.append('h4').attr('class', 'history-heading').html(singular || _t.html('info_panels.selected', {
+             n: selected.length
+           }));
+           if (!singular) return;

 
 

-           function zoomMap() {
-               var zoomStart = context.map().zoom();
+           if (entity) {
+             selection.call(redrawEntity, entity);
+           } else if (note) {
+             selection.call(redrawNote, note);
+           }
+         }

 
 

-               var textId = context.lastPointerType() === 'mouse' ? 'zoom' : 'zoom_touch';
-               var zoomString = helpString('intro.navigation.' + textId);
+         function redrawNote(selection, note) {
+           if (!note || note.isNew()) {
+             selection.append('div').html(_t.html('info_panels.history.note_no_history'));
+             return;
+           }

 
 

-               reveal('.surface', zoomString);
+           var list = selection.append('ul');
+           list.append('li').html(_t.html('info_panels.history.note_comments') + ':').append('span').html(note.comments.length);

 
 

-               context.map().on('drawn.intro', function() {
-                   reveal('.surface', zoomString, { duration: 0 });
-               });
+           if (note.comments.length) {
+             list.append('li').html(_t.html('info_panels.history.note_created_date') + ':').append('span').html(displayTimestamp(note.comments[0].date));
+             list.append('li').html(_t.html('info_panels.history.note_created_user') + ':').call(displayUser, note.comments[0].user);
+           }

 
 

-               context.map().on('move.intro', function() {
-                   if (context.map().zoom() !== zoomStart) {
-                       context.map().on('move.intro', null);
-                       timeout(function() { continueTo(features); }, 3000);
-                   }
-               });
+           if (osm) {
+             selection.append('a').attr('class', 'view-history-on-osm').attr('target', '_blank').attr('href', osm.noteURL(note)).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('info_panels.history.note_link_text'));
+           }
+         }

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   nextStep();
-               }
+         function redrawEntity(selection, entity) {
+           if (!entity || entity.isNew()) {
+             selection.append('div').html(_t.html('info_panels.history.no_history'));
+             return;

            }
 
            }
 

+           var links = selection.append('div').attr('class', 'links');

 
 

-           function features() {
-               var onClick = function() { continueTo(pointsLinesAreas); };
+           if (osm) {
+             links.append('a').attr('class', 'view-history-on-osm').attr('href', osm.historyURL(entity)).attr('target', '_blank').attr('title', _t('info_panels.history.link_text')).html('OSM');
+           }

 
 

-               reveal('.surface', helpString('intro.navigation.features'),
-                   { buttonText: _t('intro.ok'), buttonCallback: onClick }
-               );
+           links.append('a').attr('class', 'pewu-history-viewer-link').attr('href', 'https://pewu.github.io/osm-history/#/' + entity.type + '/' + entity.osmId()).attr('target', '_blank').attr('tabindex', -1).html('PeWu');
+           var list = selection.append('ul');
+           list.append('li').html(_t.html('info_panels.history.version') + ':').append('span').html(entity.version);
+           list.append('li').html(_t.html('info_panels.history.last_edit') + ':').append('span').html(displayTimestamp(entity.timestamp));
+           list.append('li').html(_t.html('info_panels.history.edited_by') + ':').call(displayUser, entity.user);
+           list.append('li').html(_t.html('info_panels.history.changeset') + ':').call(displayChangeset, entity.changeset);
+         }

 
 

-               context.map().on('drawn.intro', function() {
-                   reveal('.surface', helpString('intro.navigation.features'),
-                       { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-                   );
-               });
+         var panel = function panel(selection) {
+           selection.call(redraw);
+           context.map().on('drawn.info-history', function () {
+             selection.call(redraw);
+           });
+           context.on('enter.info-history', function () {
+             selection.call(redraw);
+           });
+         };

 
 

-               function continueTo(nextStep) {
-                   context.map().on('drawn.intro', null);
-                   nextStep();
-               }
-           }
+         panel.off = function () {
+           context.map().on('drawn.info-history', null);
+           context.on('enter.info-history', null);
+         };

 
 

-           function pointsLinesAreas() {
-               var onClick = function() { continueTo(nodesWays); };
+         panel.id = 'history';
+         panel.label = _t.html('info_panels.history.title');
+         panel.key = _t('info_panels.history.key');
+         return panel;
+       }

 
 

-               reveal('.surface', helpString('intro.navigation.points_lines_areas'),
-                   { buttonText: _t('intro.ok'), buttonCallback: onClick }
-               );
+       var OSM_PRECISION = 7;
+       /**
+        * Returns a localized representation of the given length measurement.
+        *
+        * @param {Number} m area in meters
+        * @param {Boolean} isImperial true for U.S. customary units; false for metric
+        */

 
 

-               context.map().on('drawn.intro', function() {
-                   reveal('.surface', helpString('intro.navigation.points_lines_areas'),
-                       { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-                   );
-               });
+       function displayLength(m, isImperial) {
+         var d = m * (isImperial ? 3.28084 : 1);
+         var unit;

 
 

-               function continueTo(nextStep) {
-                   context.map().on('drawn.intro', null);
-                   nextStep();
-               }
+         if (isImperial) {
+           if (d >= 5280) {
+             d /= 5280;
+             unit = 'miles';
+           } else {
+             unit = 'feet';

            }
            }

+         } else {
+           if (d >= 1000) {
+             d /= 1000;
+             unit = 'kilometers';
+           } else {
+             unit = 'meters';
+           }
+         }

 
 

-           function nodesWays() {
-               var onClick = function() { continueTo(clickTownHall); };
+         return _t('units.' + unit, {
+           quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
+             maximumSignificantDigits: 4
+           })
+         });
+       }
+       /**
+        * Returns a localized representation of the given area measurement.
+        *
+        * @param {Number} m2 area in square meters
+        * @param {Boolean} isImperial true for U.S. customary units; false for metric
+        */

 
 

-               reveal('.surface', helpString('intro.navigation.nodes_ways'),
-                   { buttonText: _t('intro.ok'), buttonCallback: onClick }
-               );
+       function displayArea(m2, isImperial) {
+         var locale = _mainLocalizer.localeCode();
+         var d = m2 * (isImperial ? 10.7639111056 : 1);
+         var d1, d2, area;
+         var unit1 = '';
+         var unit2 = '';
+
+         if (isImperial) {
+           if (d >= 6969600) {
+             // > 0.25mi² show mi²
+             d1 = d / 27878400;
+             unit1 = 'square_miles';
+           } else {
+             d1 = d;
+             unit1 = 'square_feet';
+           }

 
 

-               context.map().on('drawn.intro', function() {
-                   reveal('.surface', helpString('intro.navigation.nodes_ways'),
-                       { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-                   );
-               });
+           if (d > 4356 && d < 43560000) {
+             // 0.1 - 1000 acres
+             d2 = d / 43560;
+             unit2 = 'acres';
+           }
+         } else {
+           if (d >= 250000) {
+             // > 0.25km² show km²
+             d1 = d / 1000000;
+             unit1 = 'square_kilometers';
+           } else {
+             d1 = d;
+             unit1 = 'square_meters';
+           }

 
 

-               function continueTo(nextStep) {
-                   context.map().on('drawn.intro', null);
-                   nextStep();
-               }
+           if (d > 1000 && d < 10000000) {
+             // 0.1 - 1000 hectares
+             d2 = d / 10000;
+             unit2 = 'hectares';

            }
            }

+         }

 
 

-           function clickTownHall() {
-               context.enter(modeBrowse(context));
-               context.history().reset('initial');
+         area = _t('units.' + unit1, {
+           quantity: d1.toLocaleString(locale, {
+             maximumSignificantDigits: 4
+           })
+         });

 
 

-               var entity = context.hasEntity(hallId);
-               if (!entity) { return; }
-               reveal(null, null, { duration: 0 });
-               context.map().centerZoomEase(entity.loc, 19, 500);
-
-               timeout(function() {
-                   var entity = context.hasEntity(hallId);
-                   if (!entity) { return; }
-                   var box = pointBox(entity.loc, context);
-                   var textId = context.lastPointerType() === 'mouse' ? 'click_townhall' : 'tap_townhall';
-                   reveal(box, helpString('intro.navigation.' + textId));
-
-                   context.map().on('move.intro drawn.intro', function() {
-                       var entity = context.hasEntity(hallId);
-                       if (!entity) { return; }
-                       var box = pointBox(entity.loc, context);
-                       reveal(box, helpString('intro.navigation.' + textId), { duration: 0 });
-                   });
+         if (d2) {
+           return _t('units.area_pair', {
+             area1: area,
+             area2: _t('units.' + unit2, {
+               quantity: d2.toLocaleString(locale, {
+                 maximumSignificantDigits: 2
+               })
+             })
+           });
+         } else {
+           return area;
+         }
+       }

 
 

-                   context.on('enter.intro', function() {
-                       if (isTownHallSelected()) { continueTo(selectedTownHall); }
-                   });
+       function wrap(x, min, max) {
+         var d = max - min;
+         return ((x - min) % d + d) % d + min;
+       }

 
 

-               }, 550);  // after centerZoomEase
+       function clamp(x, min, max) {
+         return Math.max(min, Math.min(x, max));
+       }

 
 

-               context.history().on('change.intro', function() {
-                   if (!context.hasEntity(hallId)) {
-                       continueTo(clickTownHall);
-                   }
-               });
+       function displayCoordinate(deg, pos, neg) {
+         var locale = _mainLocalizer.localeCode();
+         var min = (Math.abs(deg) - Math.floor(Math.abs(deg))) * 60;
+         var sec = (min - Math.floor(min)) * 60;
+         var displayDegrees = _t('units.arcdegrees', {
+           quantity: Math.floor(Math.abs(deg)).toLocaleString(locale)
+         });
+         var displayCoordinate;

 
 

-               function continueTo(nextStep) {
-                   context.on('enter.intro', null);
-                   context.map().on('move.intro drawn.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
-           }
+         if (Math.floor(sec) > 0) {
+           displayCoordinate = displayDegrees + _t('units.arcminutes', {
+             quantity: Math.floor(min).toLocaleString(locale)
+           }) + _t('units.arcseconds', {
+             quantity: Math.round(sec).toLocaleString(locale)
+           });
+         } else if (Math.floor(min) > 0) {
+           displayCoordinate = displayDegrees + _t('units.arcminutes', {
+             quantity: Math.round(min).toLocaleString(locale)
+           });
+         } else {
+           displayCoordinate = _t('units.arcdegrees', {
+             quantity: Math.round(Math.abs(deg)).toLocaleString(locale)
+           });
+         }

 
 

+         if (deg === 0) {
+           return displayCoordinate;
+         } else {
+           return _t('units.coordinate', {
+             coordinate: displayCoordinate,
+             direction: _t('units.' + (deg > 0 ? pos : neg))
+           });
+         }
+       }
+       /**
+        * Returns given coordinate pair in degree-minute-second format.
+        *
+        * @param {Array<Number>} coord longitude and latitude
+        */

 
 

-           function selectedTownHall() {
-               if (!isTownHallSelected()) { return clickTownHall(); }

 
 

-               var entity = context.hasEntity(hallId);
-               if (!entity) { return clickTownHall(); }
+       function dmsCoordinatePair(coord) {
+         return _t('units.coordinate_pair', {
+           latitude: displayCoordinate(clamp(coord[1], -90, 90), 'north', 'south'),
+           longitude: displayCoordinate(wrap(coord[0], -180, 180), 'east', 'west')
+         });
+       }
+       /**
+        * Returns the given coordinate pair in decimal format.
+        * note: unlocalized to avoid comma ambiguity - see #4765
+        *
+        * @param {Array<Number>} coord longitude and latitude
+        */

 
 

-               var box = pointBox(entity.loc, context);
-               var onClick = function() { continueTo(editorTownHall); };
+       function decimalCoordinatePair(coord) {
+         return _t('units.coordinate_pair', {
+           latitude: clamp(coord[1], -90, 90).toFixed(OSM_PRECISION),
+           longitude: wrap(coord[0], -180, 180).toFixed(OSM_PRECISION)
+         });
+       }

 
 

-               reveal(box, helpString('intro.navigation.selected_townhall'),
-                   { buttonText: _t('intro.ok'), buttonCallback: onClick }
-               );
+       function uiPanelLocation(context) {
+         var currLocation = '';

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   var entity = context.hasEntity(hallId);
-                   if (!entity) { return; }
-                   var box = pointBox(entity.loc, context);
-                   reveal(box, helpString('intro.navigation.selected_townhall'),
-                       { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-                   );
-               });
+         function redraw(selection) {
+           selection.html('');
+           var list = selection.append('ul'); // Mouse coordinates

 
 

-               context.history().on('change.intro', function() {
-                   if (!context.hasEntity(hallId)) {
-                       continueTo(clickTownHall);
-                   }
-               });
+           var coord = context.map().mouseCoordinates();

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
+           if (coord.some(isNaN)) {
+             coord = context.map().center();

            }
 
            }
 

+           list.append('li').html(dmsCoordinatePair(coord)).append('li').html(decimalCoordinatePair(coord)); // Location Info

 
 

-           function editorTownHall() {
-               if (!isTownHallSelected()) { return clickTownHall(); }
-
-               // disallow scrolling
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-
-               var onClick = function() { continueTo(presetTownHall); };
-
-               reveal('.entity-editor-pane',
-                   helpString('intro.navigation.editor_townhall'),
-                   { buttonText: _t('intro.ok'), buttonCallback: onClick }
-               );
-
-               context.on('exit.intro', function() {
-                   continueTo(clickTownHall);
-               });
+           selection.append('div').attr('class', 'location-info').html(currLocation || ' ');
+           debouncedGetLocation(selection, coord);
+         }

 
 

-               context.history().on('change.intro', function() {
-                   if (!context.hasEntity(hallId)) {
-                       continueTo(clickTownHall);
-                   }
-               });
+         var debouncedGetLocation = debounce(getLocation, 250);

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   context.history().on('change.intro', null);
-                   context.container().select('.inspector-wrap').on('wheel.intro', null);
-                   nextStep();
-               }
+         function getLocation(selection, coord) {
+           if (!services.geocoder) {
+             currLocation = _t('info_panels.location.unknown_location');
+             selection.selectAll('.location-info').html(currLocation);
+           } else {
+             services.geocoder.reverse(coord, function (err, result) {
+               currLocation = result ? result.display_name : _t('info_panels.location.unknown_location');
+               selection.selectAll('.location-info').html(currLocation);
+             });

            }
            }

+         }

 
 

+         var panel = function panel(selection) {
+           selection.call(redraw);
+           context.surface().on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function () {
+             selection.call(redraw);
+           });
+         };

 
 

-           function presetTownHall() {
-               if (!isTownHallSelected()) { return clickTownHall(); }
+         panel.off = function () {
+           context.surface().on('.info-location', null);
+         };

 
 

-               // reset pane, in case user happened to change it..
-               context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-               // disallow scrolling
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+         panel.id = 'location';
+         panel.label = _t.html('info_panels.location.title');
+         panel.key = _t('info_panels.location.key');
+         return panel;
+       }

 
 

-               // preset match, in case the user happened to change it.
-               var entity = context.entity(context.selectedIDs()[0]);
-               var preset = _mainPresetIndex.match(entity, context.graph());
+       function uiPanelMeasurement(context) {
+         function radiansToMeters(r) {
+           // using WGS84 authalic radius (6371007.1809 m)
+           return r * 6371007.1809;
+         }

 
 

-               var onClick = function() { continueTo(fieldsTownHall); };
+         function steradiansToSqmeters(r) {
+           // http://gis.stackexchange.com/a/124857/40446
+           return r / (4 * Math.PI) * 510065621724000;
+         }

 
 

-               reveal('.entity-editor-pane .section-feature-type',
-                   helpString('intro.navigation.preset_townhall', { preset: preset.name() }),
-                   { buttonText: _t('intro.ok'), buttonCallback: onClick }
-               );
+         function toLineString(feature) {
+           if (feature.type === 'LineString') return feature;
+           var result = {
+             type: 'LineString',
+             coordinates: []
+           };

 
 

-               context.on('exit.intro', function() {
-                   continueTo(clickTownHall);
-               });
+           if (feature.type === 'Polygon') {
+             result.coordinates = feature.coordinates[0];
+           } else if (feature.type === 'MultiPolygon') {
+             result.coordinates = feature.coordinates[0][0];
+           }

 
 

-               context.history().on('change.intro', function() {
-                   if (!context.hasEntity(hallId)) {
-                       continueTo(clickTownHall);
-                   }
-               });
+           return result;
+         }

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   context.history().on('change.intro', null);
-                   context.container().select('.inspector-wrap').on('wheel.intro', null);
-                   nextStep();
-               }
-           }
+         var _isImperial = !_mainLocalizer.usesMetric();

 
 

+         function redraw(selection) {
+           var graph = context.graph();
+           var selectedNoteID = context.selectedNoteID();
+           var osm = services.osm;
+           var localeCode = _mainLocalizer.localeCode();
+           var heading;
+           var center, location, centroid;
+           var closed, geometry;
+           var totalNodeCount,
+               length = 0,
+               area = 0,
+               distance;
+
+           if (selectedNoteID && osm) {
+             // selected 1 note
+             var note = osm.getNote(selectedNoteID);
+             heading = _t('note.note') + ' ' + selectedNoteID;
+             location = note.loc;
+             geometry = 'note';
+           } else {
+             // selected 1..n entities
+             var selectedIDs = context.selectedIDs().filter(function (id) {
+               return context.hasEntity(id);
+             });
+             var selected = selectedIDs.map(function (id) {
+               return context.entity(id);
+             });
+             heading = selected.length === 1 ? selected[0].id : _t('info_panels.selected', {
+               n: selected.length
+             });

 
 

-           function fieldsTownHall() {
-               if (!isTownHallSelected()) { return clickTownHall(); }
+             if (selected.length) {
+               var extent = geoExtent();

 
 

-               // reset pane, in case user happened to change it..
-               context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-               // disallow scrolling
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+               for (var i in selected) {
+                 var entity = selected[i];

 
 

-               var onClick = function() { continueTo(closeTownHall); };
+                 extent._extend(entity.extent(graph));

 
 

-               reveal('.entity-editor-pane .section-preset-fields',
-                   helpString('intro.navigation.fields_townhall'),
-                   { buttonText: _t('intro.ok'), buttonCallback: onClick }
-               );
+                 geometry = entity.geometry(graph);

 
 

-               context.on('exit.intro', function() {
-                   continueTo(clickTownHall);
-               });
+                 if (geometry === 'line' || geometry === 'area') {
+                   closed = entity.type === 'relation' || entity.isClosed() && !entity.isDegenerate();
+                   var feature = entity.asGeoJSON(graph);
+                   length += radiansToMeters(d3_geoLength(toLineString(feature)));
+                   centroid = d3_geoPath(context.projection).centroid(entity.asGeoJSON(graph));
+                   centroid = centroid && context.projection.invert(centroid);

 
 

-               context.history().on('change.intro', function() {
-                   if (!context.hasEntity(hallId)) {
-                       continueTo(clickTownHall);
+                   if (!centroid || !isFinite(centroid[0]) || !isFinite(centroid[1])) {
+                     centroid = entity.extent(graph).center();

                    }
                    }

-               });

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   context.history().on('change.intro', null);
-                   context.container().select('.inspector-wrap').on('wheel.intro', null);
-                   nextStep();
+                   if (closed) {
+                     area += steradiansToSqmeters(entity.area(graph));
+                   }
+                 }

                }
                }

-           }
-
-
-           function closeTownHall() {
-               if (!isTownHallSelected()) { return clickTownHall(); }
-
-               var selector = '.entity-editor-pane button.close svg use';
-               var href = select(selector).attr('href') || '#iD-icon-close';

 
 

-               reveal('.entity-editor-pane',
-                   helpString('intro.navigation.close_townhall', { button: icon(href, 'pre-text') })
-               );
-
-               context.on('exit.intro', function() {
-                   continueTo(searchStreet);
-               });
+               if (selected.length > 1) {
+                 geometry = null;
+                 closed = null;
+                 centroid = null;
+               }

 
 

-               context.history().on('change.intro', function() {
-                   // update the close icon in the tooltip if the user edits something.
-                   var selector = '.entity-editor-pane button.close svg use';
-                   var href = select(selector).attr('href') || '#iD-icon-close';
+               if (selected.length === 2 && selected[0].type === 'node' && selected[1].type === 'node') {
+                 distance = geoSphericalDistance(selected[0].loc, selected[1].loc);
+               }

 
 

-                   reveal('.entity-editor-pane',
-                       helpString('intro.navigation.close_townhall', { button: icon(href, 'pre-text') }),
-                       { duration: 0 }
-                   );
-               });
+               if (selected.length === 1 && selected[0].type === 'node') {
+                 location = selected[0].loc;
+               } else {
+                 totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
+               }

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
+               if (!location && !centroid) {
+                 center = extent.center();

                }
                }

+             }

            }
 
            }
 

+           selection.html('');

 
 

-           function searchStreet() {
-               context.enter(modeBrowse(context));
-               context.history().reset('initial');  // ensure spring street exists
-
-               var msec = transitionTime(springStreet, context.map().center());
-               if (msec) { reveal(null, null, { duration: 0 }); }
-               context.map().centerZoomEase(springStreet, 19, msec);  // ..and user can see it
+           if (heading) {
+             selection.append('h4').attr('class', 'measurement-heading').html(heading);
+           }

 
 

-               timeout(function() {
-                   reveal('.search-header input',
-                       helpString('intro.navigation.search_street', { name: _t('intro.graph.name.spring-street') })
-                   );
+           var list = selection.append('ul');
+           var coordItem;

 
 

-                   context.container().select('.search-header input')
-                       .on('keyup.intro', checkSearchResult);
-               }, msec + 100);
+           if (geometry) {
+             list.append('li').html(_t.html('info_panels.measurement.geometry') + ':').append('span').html(closed ? _t('info_panels.measurement.closed_' + geometry) : _t('geometry.' + geometry));

            }
 
            }
 

+           if (totalNodeCount) {
+             list.append('li').html(_t.html('info_panels.measurement.node_count') + ':').append('span').html(totalNodeCount.toLocaleString(localeCode));
+           }

 
 

-           function checkSearchResult() {
-               var first = context.container().select('.feature-list-item:nth-child(0n+2)');  // skip "No Results" item
-               var firstName = first.select('.entity-name');
-               var name = _t('intro.graph.name.spring-street');
+           if (area) {
+             list.append('li').html(_t.html('info_panels.measurement.area') + ':').append('span').html(displayArea(area, _isImperial));
+           }

 
 

-               if (!firstName.empty() && firstName.text() === name) {
-                   reveal(first.node(),
-                       helpString('intro.navigation.choose_street', { name: name }),
-                       { duration: 300 }
-                   );
+           if (length) {
+             list.append('li').html(_t.html('info_panels.measurement.' + (closed ? 'perimeter' : 'length')) + ':').append('span').html(displayLength(length, _isImperial));
+           }

 
 

-                   context.on('exit.intro', function() {
-                       continueTo(selectedStreet);
-                   });
+           if (typeof distance === 'number') {
+             list.append('li').html(_t.html('info_panels.measurement.distance') + ':').append('span').html(displayLength(distance, _isImperial));
+           }

 
 

-                   context.container().select('.search-header input')
-                       .on('keydown.intro', eventCancel, true)
-                       .on('keyup.intro', null);
-               }
+           if (location) {
+             coordItem = list.append('li').html(_t.html('info_panels.measurement.location') + ':');
+             coordItem.append('span').html(dmsCoordinatePair(location));
+             coordItem.append('span').html(decimalCoordinatePair(location));
+           }

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   context.container().select('.search-header input')
-                       .on('keydown.intro', null)
-                       .on('keyup.intro', null);
-                   nextStep();
-               }
+           if (centroid) {
+             coordItem = list.append('li').html(_t.html('info_panels.measurement.centroid') + ':');
+             coordItem.append('span').html(dmsCoordinatePair(centroid));
+             coordItem.append('span').html(decimalCoordinatePair(centroid));

            }
 
            }
 

+           if (center) {
+             coordItem = list.append('li').html(_t.html('info_panels.measurement.center') + ':');
+             coordItem.append('span').html(dmsCoordinatePair(center));
+             coordItem.append('span').html(decimalCoordinatePair(center));
+           }

 
 

-           function selectedStreet() {
-               if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-                   return searchStreet();
-               }
+           if (length || area || typeof distance === 'number') {
+             var toggle = _isImperial ? 'imperial' : 'metric';
+             selection.append('a').html(_t.html('info_panels.measurement.' + toggle)).attr('href', '#').attr('class', 'button button-toggle-units').on('click', function (d3_event) {
+               d3_event.preventDefault();
+               _isImperial = !_isImperial;
+               selection.call(redraw);
+             });
+           }
+         }

 
 

-               var onClick = function() { continueTo(editorStreet); };
-               var entity = context.entity(springStreetEndId);
-               var box = pointBox(entity.loc, context);
-               box.height = 500;
+         var panel = function panel(selection) {
+           selection.call(redraw);
+           context.map().on('drawn.info-measurement', function () {
+             selection.call(redraw);
+           });
+           context.on('enter.info-measurement', function () {
+             selection.call(redraw);
+           });
+         };

 
 

-               reveal(box,
-                   helpString('intro.navigation.selected_street', { name: _t('intro.graph.name.spring-street') }),
-                   { duration: 600, buttonText: _t('intro.ok'), buttonCallback: onClick }
-               );
+         panel.off = function () {
+           context.map().on('drawn.info-measurement', null);
+           context.on('enter.info-measurement', null);
+         };

 
 

-               timeout(function() {
-                   context.map().on('move.intro drawn.intro', function() {
-                       var entity = context.hasEntity(springStreetEndId);
-                       if (!entity) { return; }
-                       var box = pointBox(entity.loc, context);
-                       box.height = 500;
-                       reveal(box,
-                           helpString('intro.navigation.selected_street', { name: _t('intro.graph.name.spring-street') }),
-                           { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-                       );
-                   });
-               }, 600);  // after reveal.
+         panel.id = 'measurement';
+         panel.label = _t.html('info_panels.measurement.title');
+         panel.key = _t('info_panels.measurement.key');
+         return panel;
+       }

 
 

-               context.on('enter.intro', function(mode) {
-                   if (!context.hasEntity(springStreetId)) {
-                       return continueTo(searchStreet);
-                   }
-                   var ids = context.selectedIDs();
-                   if (mode.id !== 'select' || !ids.length || ids[0] !== springStreetId) {
-                       // keep Spring Street selected..
-                       context.enter(modeSelect(context, [springStreetId]));
-                   }
-               });
+       var uiInfoPanels = {
+         background: uiPanelBackground,
+         history: uiPanelHistory,
+         location: uiPanelLocation,
+         measurement: uiPanelMeasurement
+       };

 
 

-               context.history().on('change.intro', function() {
-                   if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-                       timeout(function() {
-                           continueTo(searchStreet);
-                       }, 300);  // after any transition (e.g. if user deleted intersection)
-                   }
-               });
+       function uiInfo(context) {
+         var ids = Object.keys(uiInfoPanels);
+         var wasActive = ['measurement'];
+         var panels = {};
+         var active = {}; // create panels

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
+         ids.forEach(function (k) {
+           if (!panels[k]) {
+             panels[k] = uiInfoPanels[k](context);
+             active[k] = false;

            }
            }

+         });

 
 

+         function info(selection) {
+           function redraw() {
+             var activeids = ids.filter(function (k) {
+               return active[k];
+             }).sort();
+             var containers = infoPanels.selectAll('.panel-container').data(activeids, function (k) {
+               return k;
+             });
+             containers.exit().style('opacity', 1).transition().duration(200).style('opacity', 0).on('end', function (d) {
+               select(this).call(panels[d].off).remove();
+             });
+             var enter = containers.enter().append('div').attr('class', function (d) {
+               return 'fillD2 panel-container panel-container-' + d;
+             });
+             enter.style('opacity', 0).transition().duration(200).style('opacity', 1);
+             var title = enter.append('div').attr('class', 'panel-title fillD2');
+             title.append('h3').html(function (d) {
+               return panels[d].label;
+             });
+             title.append('button').attr('class', 'close').on('click', function (d3_event, d) {
+               d3_event.stopImmediatePropagation();
+               d3_event.preventDefault();
+               info.toggle(d);
+             }).call(svgIcon('#iD-icon-close'));
+             enter.append('div').attr('class', function (d) {
+               return 'panel-content panel-content-' + d;
+             }); // redraw the panels
+
+             infoPanels.selectAll('.panel-content').each(function (d) {
+               select(this).call(panels[d]);
+             });
+           }

 
 

-           function editorStreet() {
-               var selector = '.entity-editor-pane button.close svg use';
-               var href = select(selector).attr('href') || '#iD-icon-close';
-
-               reveal('.entity-editor-pane', helpString('intro.navigation.street_different_fields') + '{br}' +
-                   helpString('intro.navigation.editor_street', {
-                       button: icon(href, 'pre-text'),
-                       field1: onewayField.label(),
-                       field2: maxspeedField.label()
-                   }));
-
-               context.on('exit.intro', function() {
-                   continueTo(play);
-               });
+           info.toggle = function (which) {
+             var activeids = ids.filter(function (k) {
+               return active[k];
+             });

 
 

-               context.history().on('change.intro', function() {
-                   // update the close icon in the tooltip if the user edits something.
-                   var selector = '.entity-editor-pane button.close svg use';
-                   var href = select(selector).attr('href') || '#iD-icon-close';
-
-                   reveal('.entity-editor-pane', helpString('intro.navigation.street_different_fields') + '{br}' +
-                       helpString('intro.navigation.editor_street', {
-                           button: icon(href, 'pre-text'),
-                           field1: onewayField.label(),
-                           field2: maxspeedField.label()
-                       }), { duration: 0 }
-                   );
-               });
+             if (which) {
+               // toggle one
+               active[which] = !active[which];

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
+               if (activeids.length === 1 && activeids[0] === which) {
+                 // none active anymore
+                 wasActive = [which];

                }
                }

-           }
-
-
-           function play() {
-               dispatch$1.call('done');
-               reveal('.ideditor',
-                   helpString('intro.navigation.play', { next: _t('intro.points.title') }), {
-                       tooltipBox: '.intro-nav-wrap .chapter-point',
-                       buttonText: _t('intro.ok'),
-                       buttonCallback: function() { reveal('.ideditor'); }
-                   }
-               );
-           }

 
 

+               context.container().select('.' + which + '-panel-toggle-item').classed('active', active[which]).select('input').property('checked', active[which]);
+             } else {
+               // toggle all
+               if (activeids.length) {
+                 wasActive = activeids;
+                 activeids.forEach(function (k) {
+                   active[k] = false;
+                 });
+               } else {
+                 wasActive.forEach(function (k) {
+                   active[k] = true;
+                 });
+               }
+             }

 
 

-           chapter.enter = function() {
-               dragMap();
+             redraw();

            };
 
            };
 

+           var infoPanels = selection.selectAll('.info-panels').data([0]);
+           infoPanels = infoPanels.enter().append('div').attr('class', 'info-panels').merge(infoPanels);
+           redraw();
+           context.keybinding().on(uiCmd('⌘' + _t('info_panels.key')), function (d3_event) {
+             d3_event.stopImmediatePropagation();
+             d3_event.preventDefault();
+             info.toggle();
+           });
+           ids.forEach(function (k) {
+             var key = _t('info_panels.' + k + '.key', {
+               "default": null
+             });
+             if (!key) return;
+             context.keybinding().on(uiCmd('⌘⇧' + key), function (d3_event) {
+               d3_event.stopImmediatePropagation();
+               d3_event.preventDefault();
+               info.toggle(k);
+             });
+           });
+         }

 
 

-           chapter.exit = function() {
-               timeouts.forEach(window.clearTimeout);
-               context.on('enter.intro exit.intro', null);
-               context.map().on('move.intro drawn.intro', null);
-               context.history().on('change.intro', null);
-               context.container().select('.inspector-wrap').on('wheel.intro', null);
-               context.container().select('.search-header input').on('keydown.intro keyup.intro', null);
-           };
+         return info;
+       }

 
 

+       function pointBox(loc, context) {
+         var rect = context.surfaceRect();
+         var point = context.curtainProjection(loc);
+         return {
+           left: point[0] + rect.left - 40,
+           top: point[1] + rect.top - 60,
+           width: 80,
+           height: 90
+         };
+       }
+       function pad(locOrBox, padding, context) {
+         var box;

 
 

-           chapter.restart = function() {
-               chapter.exit();
-               chapter.enter();
+         if (locOrBox instanceof Array) {
+           var rect = context.surfaceRect();
+           var point = context.curtainProjection(locOrBox);
+           box = {
+             left: point[0] + rect.left,
+             top: point[1] + rect.top

            };
            };

+         } else {
+           box = locOrBox;
+         }

 
 

-
-           return utilRebind(chapter, dispatch$1, 'on');
+         return {
+           left: box.left - padding,
+           top: box.top - padding,
+           width: (box.width || 0) + 2 * padding,
+           height: (box.width || 0) + 2 * padding
+         };

        }
        }

+       function icon(name, svgklass, useklass) {
+         return '<svg class="icon ' + (svgklass || '') + '">' + '<use xlink:href="' + name + '"' + (useklass ? ' class="' + useklass + '"' : '') + '></use></svg>';
+       }
+       var helpStringReplacements; // Returns the localized HTML element for `id` with a standardized set of icon, key, and
+       // label replacements suitable for tutorials and documentation. Optionally supplemented
+       // with custom `replacements`

 
 

-       function uiIntroPoint(context, reveal) {
-           var dispatch$1 = dispatch('done');
-           var timeouts = [];
-           var intersection = [-85.63279, 41.94394];
-           var building = [-85.632422, 41.944045];
-           var cafePreset = _mainPresetIndex.item('amenity/cafe');
-           var _pointID = null;
-
+       function helpHtml(id, replacements) {
+         // only load these the first time
+         if (!helpStringReplacements) {
+           helpStringReplacements = {
+             // insert icons corresponding to various UI elements
+             point_icon: icon('#iD-icon-point', 'inline'),
+             line_icon: icon('#iD-icon-line', 'inline'),
+             area_icon: icon('#iD-icon-area', 'inline'),
+             note_icon: icon('#iD-icon-note', 'inline add-note'),
+             plus: icon('#iD-icon-plus', 'inline'),
+             minus: icon('#iD-icon-minus', 'inline'),
+             layers_icon: icon('#iD-icon-layers', 'inline'),
+             data_icon: icon('#iD-icon-data', 'inline'),
+             inspect: icon('#iD-icon-inspect', 'inline'),
+             help_icon: icon('#iD-icon-help', 'inline'),
+             undo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo', 'inline'),
+             redo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-undo' : '#iD-icon-redo', 'inline'),
+             save_icon: icon('#iD-icon-save', 'inline'),
+             // operation icons
+             circularize_icon: icon('#iD-operation-circularize', 'inline operation'),
+             continue_icon: icon('#iD-operation-continue', 'inline operation'),
+             copy_icon: icon('#iD-operation-copy', 'inline operation'),
+             delete_icon: icon('#iD-operation-delete', 'inline operation'),
+             disconnect_icon: icon('#iD-operation-disconnect', 'inline operation'),
+             downgrade_icon: icon('#iD-operation-downgrade', 'inline operation'),
+             extract_icon: icon('#iD-operation-extract', 'inline operation'),
+             merge_icon: icon('#iD-operation-merge', 'inline operation'),
+             move_icon: icon('#iD-operation-move', 'inline operation'),
+             orthogonalize_icon: icon('#iD-operation-orthogonalize', 'inline operation'),
+             paste_icon: icon('#iD-operation-paste', 'inline operation'),
+             reflect_long_icon: icon('#iD-operation-reflect-long', 'inline operation'),
+             reflect_short_icon: icon('#iD-operation-reflect-short', 'inline operation'),
+             reverse_icon: icon('#iD-operation-reverse', 'inline operation'),
+             rotate_icon: icon('#iD-operation-rotate', 'inline operation'),
+             split_icon: icon('#iD-operation-split', 'inline operation'),
+             straighten_icon: icon('#iD-operation-straighten', 'inline operation'),
+             // interaction icons
+             leftclick: icon('#iD-walkthrough-mouse-left', 'inline operation'),
+             rightclick: icon('#iD-walkthrough-mouse-right', 'inline operation'),
+             mousewheel_icon: icon('#iD-walkthrough-mousewheel', 'inline operation'),
+             tap_icon: icon('#iD-walkthrough-tap', 'inline operation'),
+             doubletap_icon: icon('#iD-walkthrough-doubletap', 'inline operation'),
+             longpress_icon: icon('#iD-walkthrough-longpress', 'inline operation'),
+             touchdrag_icon: icon('#iD-walkthrough-touchdrag', 'inline operation'),
+             pinch_icon: icon('#iD-walkthrough-pinch-apart', 'inline operation'),
+             // insert keys; may be localized and platform-dependent
+             shift: uiCmd.display('⇧'),
+             alt: uiCmd.display('⌥'),
+             "return": uiCmd.display('↵'),
+             esc: _t.html('shortcuts.key.esc'),
+             space: _t.html('shortcuts.key.space'),
+             add_note_key: _t.html('modes.add_note.key'),
+             help_key: _t.html('help.key'),
+             shortcuts_key: _t.html('shortcuts.toggle.key'),
+             // reference localized UI labels directly so that they'll always match
+             save: _t.html('save.title'),
+             undo: _t.html('undo.title'),
+             redo: _t.html('redo.title'),
+             upload: _t.html('commit.save'),
+             point: _t.html('modes.add_point.title'),
+             line: _t.html('modes.add_line.title'),
+             area: _t.html('modes.add_area.title'),
+             note: _t.html('modes.add_note.label'),
+             circularize: _t.html('operations.circularize.title'),
+             "continue": _t.html('operations.continue.title'),
+             copy: _t.html('operations.copy.title'),
+             "delete": _t.html('operations.delete.title'),
+             disconnect: _t.html('operations.disconnect.title'),
+             downgrade: _t.html('operations.downgrade.title'),
+             extract: _t.html('operations.extract.title'),
+             merge: _t.html('operations.merge.title'),
+             move: _t.html('operations.move.title'),
+             orthogonalize: _t.html('operations.orthogonalize.title'),
+             paste: _t.html('operations.paste.title'),
+             reflect_long: _t.html('operations.reflect.title.long'),
+             reflect_short: _t.html('operations.reflect.title.short'),
+             reverse: _t.html('operations.reverse.title'),
+             rotate: _t.html('operations.rotate.title'),
+             split: _t.html('operations.split.title'),
+             straighten: _t.html('operations.straighten.title'),
+             map_data: _t.html('map_data.title'),
+             osm_notes: _t.html('map_data.layers.notes.title'),
+             fields: _t.html('inspector.fields'),
+             tags: _t.html('inspector.tags'),
+             relations: _t.html('inspector.relations'),
+             new_relation: _t.html('inspector.new_relation'),
+             turn_restrictions: _t.html('_tagging.presets.fields.restrictions.label'),
+             background_settings: _t.html('background.description'),
+             imagery_offset: _t.html('background.fix_misalignment'),
+             start_the_walkthrough: _t.html('splash.walkthrough'),
+             help: _t.html('help.title'),
+             ok: _t.html('intro.ok')
+           };
+         }
+
+         var reps;
+
+         if (replacements) {
+           reps = Object.assign(replacements, helpStringReplacements);
+         } else {
+           reps = helpStringReplacements;
+         }

 
 

-           var chapter = {
-               title: 'intro.points.title'
-           };
+         return _t.html(id, reps) // use keyboard key styling for shortcuts
+         .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
+       }

 
 

+       function slugify(text) {
+         return text.toString().toLowerCase().replace(/\s+/g, '-') // Replace spaces with -
+         .replace(/[^\w\-]+/g, '') // Remove all non-word chars
+         .replace(/\-\-+/g, '-') // Replace multiple - with single -
+         .replace(/^-+/, '') // Trim - from start of text
+         .replace(/-+$/, ''); // Trim - from end of text
+       } // console warning for missing walkthrough names

 
 

-           function timeout(f, t) {
-               timeouts.push(window.setTimeout(f, t));
-           }

 
 

+       var missingStrings = {};

 
 

-           function eventCancel() {
-               event.stopPropagation();
-               event.preventDefault();
-           }
+       function checkKey(key, text) {
+         if (_t(key, {
+           "default": undefined
+         }) === undefined) {
+           if (missingStrings.hasOwnProperty(key)) return; // warn once

 
 

+           missingStrings[key] = text;
+           var missing = key + ': ' + text;
+           if (typeof console !== 'undefined') console.log(missing); // eslint-disable-line
+         }
+       }

 
 

-           function addPoint() {
-               context.enter(modeBrowse(context));
-               context.history().reset('initial');
+       function localize(obj) {
+         var key; // Assign name if entity has one..

 
 

-               var msec = transitionTime(intersection, context.map().center());
-               if (msec) { reveal(null, null, { duration: 0 }); }
-               context.map().centerZoomEase(intersection, 19, msec);
+         var name = obj.tags && obj.tags.name;

 
 

-               timeout(function() {
-                   var tooltip = reveal('button.add-point',
-                       helpString('intro.points.points_info') + '{br}' + helpString('intro.points.add_point'));
+         if (name) {
+           key = 'intro.graph.name.' + slugify(name);
+           obj.tags.name = _t(key, {
+             "default": name
+           });
+           checkKey(key, name);
+         } // Assign street name if entity has one..

 
 

-                   _pointID = null;

 
 

-                   tooltip.selectAll('.popover-inner')
-                       .insert('svg', 'span')
-                       .attr('class', 'tooltip-illustration')
-                       .append('use')
-                       .attr('xlink:href', '#iD-graphic-points');
+         var street = obj.tags && obj.tags['addr:street'];

 
 

-                   context.on('enter.intro', function(mode) {
-                       if (mode.id !== 'add-point') { return; }
-                       continueTo(placePoint);
-                   });
-               }, msec + 100);
+         if (street) {
+           key = 'intro.graph.name.' + slugify(street);
+           obj.tags['addr:street'] = _t(key, {
+             "default": street
+           });
+           checkKey(key, street); // Add address details common across walkthrough..
+
+           var addrTags = ['block_number', 'city', 'county', 'district', 'hamlet', 'neighbourhood', 'postcode', 'province', 'quarter', 'state', 'subdistrict', 'suburb'];
+           addrTags.forEach(function (k) {
+             var key = 'intro.graph.' + k;
+             var tag = 'addr:' + k;
+             var val = obj.tags && obj.tags[tag];
+             var str = _t(key, {
+               "default": val
+             });

 
 

-               function continueTo(nextStep) {
-                   context.on('enter.intro', null);
-                   nextStep();
+             if (str) {
+               if (str.match(/^<.*>$/) !== null) {
+                 delete obj.tags[tag];
+               } else {
+                 obj.tags[tag] = str;

                }
                }

-           }
+             }
+           });
+         }

 
 

+         return obj;
+       } // Used to detect squareness.. some duplicataion of code from actionOrthogonalize.

 
 

-           function placePoint() {
-               if (context.mode().id !== 'add-point') {
-                   return chapter.restart();
-               }
+       function isMostlySquare(points) {
+         // note: uses 15 here instead of the 12 from actionOrthogonalize because
+         // actionOrthogonalize can actually straighten some larger angles as it iterates
+         var threshold = 15; // degrees within right or straight

 
 

-               var pointBox = pad(building, 150, context);
-               var textId = context.lastPointerType() === 'mouse' ? 'place_point' : 'place_point_touch';
-               reveal(pointBox, helpString('intro.points.' + textId));
+         var lowerBound = Math.cos((90 - threshold) * Math.PI / 180); // near right

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   pointBox = pad(building, 150, context);
-                   reveal(pointBox, helpString('intro.points.' + textId), { duration: 0 });
-               });
+         var upperBound = Math.cos(threshold * Math.PI / 180); // near straight

 
 

-               context.on('enter.intro', function(mode) {
-                   if (mode.id !== 'select') { return chapter.restart(); }
-                   _pointID = context.mode().selectedIDs()[0];
-                   continueTo(searchPreset);
-               });
+         for (var i = 0; i < points.length; i++) {
+           var a = points[(i - 1 + points.length) % points.length];
+           var origin = points[i];
+           var b = points[(i + 1) % points.length];
+           var dotp = geoVecNormalizedDot(a, b, origin);
+           var mag = Math.abs(dotp);

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
+           if (mag > lowerBound && mag < upperBound) {
+             return false;

            }
            }

+         }

 
 

+         return true;
+       }
+       function selectMenuItem(context, operation) {
+         return context.container().select('.edit-menu .edit-menu-item-' + operation);
+       }
+       function transitionTime(point1, point2) {
+         var distance = geoSphericalDistance(point1, point2);

 
 

-           function searchPreset() {
-               if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-                   return addPoint();
-               }
-
-               // disallow scrolling
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+         if (distance === 0) {
+           return 0;
+         } else if (distance < 80) {
+           return 500;
+         } else {
+           return 1000;
+         }
+       }

 
 

-               context.container().select('.preset-search-input')
-                   .on('keydown.intro', null)
-                   .on('keyup.intro', checkPresetSearch);
+       // hide class, which sets display=none, and a d3 transition for opacity.
+       // this will cause blinking when called repeatedly, so check that the
+       // value actually changes between calls.

 
 

-               reveal('.preset-search-input',
-                   helpString('intro.points.search_cafe', { preset: cafePreset.name() })
-               );
+       function uiToggle(show, callback) {
+         return function (selection) {
+           selection.style('opacity', show ? 0 : 1).classed('hide', false).transition().style('opacity', show ? 1 : 0).on('end', function () {
+             select(this).classed('hide', !show).style('opacity', null);
+             if (callback) callback.apply(this);
+           });
+         };
+       }

 
 

-               context.on('enter.intro', function(mode) {
-                   if (!_pointID || !context.hasEntity(_pointID)) {
-                       return continueTo(addPoint);
-                   }
+       function uiCurtain(containerNode) {
+         var surface = select(null),
+             tooltip = select(null),
+             darkness = select(null);

 
 

-                   var ids = context.selectedIDs();
-                   if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
-                       // keep the user's point selected..
-                       context.enter(modeSelect(context, [_pointID]));
+         function curtain(selection) {
+           surface = selection.append('svg').attr('class', 'curtain').style('top', 0).style('left', 0);
+           darkness = surface.append('path').attr('x', 0).attr('y', 0).attr('class', 'curtain-darkness');
+           select(window).on('resize.curtain', resize);
+           tooltip = selection.append('div').attr('class', 'tooltip');
+           tooltip.append('div').attr('class', 'popover-arrow');
+           tooltip.append('div').attr('class', 'popover-inner');
+           resize();

 
 

-                       // disallow scrolling
-                       context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           function resize() {
+             surface.attr('width', containerNode.clientWidth).attr('height', containerNode.clientHeight);
+             curtain.cut(darkness.datum());
+           }
+         }
+         /**
+          * Reveal cuts the curtain to highlight the given box,
+          * and shows a tooltip with instructions next to the box.
+          *
+          * @param  {String|ClientRect} [box]   box used to cut the curtain
+          * @param  {String}    [text]          text for a tooltip
+          * @param  {Object}    [options]
+          * @param  {string}    [options.tooltipClass]    optional class to add to the tooltip
+          * @param  {integer}   [options.duration]        transition time in milliseconds
+          * @param  {string}    [options.buttonText]      if set, create a button with this text label
+          * @param  {function}  [options.buttonCallback]  if set, the callback for the button
+          * @param  {function}  [options.padding]         extra margin in px to put around bbox
+          * @param  {String|ClientRect} [options.tooltipBox]  box for tooltip position, if different from box for the curtain
+          */

 
 

-                       context.container().select('.preset-search-input')
-                           .on('keydown.intro', null)
-                           .on('keyup.intro', checkPresetSearch);

 
 

-                       reveal('.preset-search-input',
-                           helpString('intro.points.search_cafe', { preset: cafePreset.name() })
-                       );
+         curtain.reveal = function (box, html, options) {
+           options = options || {};

 
 

-                       context.history().on('change.intro', null);
-                   }
-               });
+           if (typeof box === 'string') {
+             box = select(box).node();
+           }

 
 

+           if (box && box.getBoundingClientRect) {
+             box = copyBox(box.getBoundingClientRect());
+             var containerRect = containerNode.getBoundingClientRect();
+             box.top -= containerRect.top;
+             box.left -= containerRect.left;
+           }

 
 

-               function checkPresetSearch() {
-                   var first = context.container().select('.preset-list-item:first-child');
+           if (box && options.padding) {
+             box.top -= options.padding;
+             box.left -= options.padding;
+             box.bottom += options.padding;
+             box.right += options.padding;
+             box.height += options.padding * 2;
+             box.width += options.padding * 2;
+           }

 
 

-                   if (first.classed('preset-amenity-cafe')) {
-                       context.container().select('.preset-search-input')
-                           .on('keydown.intro', eventCancel, true)
-                           .on('keyup.intro', null);
+           var tooltipBox;

 
 

-                       reveal(first.select('.preset-list-button').node(),
-                           helpString('intro.points.choose_cafe', { preset: cafePreset.name() }),
-                           { duration: 300 }
-                       );
+           if (options.tooltipBox) {
+             tooltipBox = options.tooltipBox;

 
 

-                       context.history().on('change.intro', function() {
-                           continueTo(aboutFeatureEditor);
-                       });
-                   }
-               }
+             if (typeof tooltipBox === 'string') {
+               tooltipBox = select(tooltipBox).node();
+             }

 
 

-               function continueTo(nextStep) {
-                   context.on('enter.intro', null);
-                   context.history().on('change.intro', null);
-                   context.container().select('.inspector-wrap').on('wheel.intro', null);
-                   context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-                   nextStep();
-               }
+             if (tooltipBox && tooltipBox.getBoundingClientRect) {
+               tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
+             }
+           } else {
+             tooltipBox = box;

            }
 
            }
 

+           if (tooltipBox && html) {
+             if (html.indexOf('**') !== -1) {
+               if (html.indexOf('<span') === 0) {
+                 html = html.replace(/^(<span.*?>)(.+?)(\*\*)/, '$1<span>$2</span>$3');
+               } else {
+                 html = html.replace(/^(.+?)(\*\*)/, '<span>$1</span>$2');
+               } // pseudo markdown bold text for the instruction section..

 
 

-           function aboutFeatureEditor() {
-               if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-                   return addPoint();
-               }

 
 

-               timeout(function() {
-                   reveal('.entity-editor-pane', helpString('intro.points.feature_editor'), {
-                       tooltipClass: 'intro-points-describe',
-                       buttonText: _t('intro.ok'),
-                       buttonCallback: function() { continueTo(addName); }
-                   });
-               }, 400);
+               html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
+             }

 
 

-               context.on('exit.intro', function() {
-                   // if user leaves select mode here, just continue with the tutorial.
-                   continueTo(reselectPoint);
-               });
+             html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   nextStep();
-               }
-           }
+             html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak

 
 

+             if (options.buttonText && options.buttonCallback) {
+               html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
+             }

 
 

-           function addName() {
-               if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-                   return addPoint();
-               }
+             var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
+             tooltip.classed(classes, true).selectAll('.popover-inner').html(html);

 
 

-               // reset pane, in case user happened to change it..
-               context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+             if (options.buttonText && options.buttonCallback) {
+               var button = tooltip.selectAll('.button-section .button.action');
+               button.on('click', function (d3_event) {
+                 d3_event.preventDefault();
+                 options.buttonCallback();
+               });
+             }

 
 

-               var addNameString = helpString('intro.points.fields_info') + '{br}' + helpString('intro.points.add_name');
+             var tip = copyBox(tooltip.node().getBoundingClientRect()),
+                 w = containerNode.clientWidth,
+                 h = containerNode.clientHeight,
+                 tooltipWidth = 200,
+                 tooltipArrow = 5,
+                 side,
+                 pos; // hack: this will have bottom placement,
+             // so need to reserve extra space for the tooltip illustration.

 
 

-               timeout(function() {
-                   // It's possible for the user to add a name in a previous step..
-                   // If so, don't tell them to add the name in this step.
-                   // Give them an OK button instead.
-                   var entity = context.entity(_pointID);
-                   if (entity.tags.name) {
-                       var tooltip = reveal('.entity-editor-pane', addNameString, {
-                           tooltipClass: 'intro-points-describe',
-                           buttonText: _t('intro.ok'),
-                           buttonCallback: function() { continueTo(addCloseEditor); }
-                       });
-                       tooltip.select('.instruction').style('display', 'none');
+             if (options.tooltipClass === 'intro-mouse') {
+               tip.height += 80;
+             } // trim box dimensions to just the portion that fits in the container..

 
 

-                   } else {
-                       reveal('.entity-editor-pane', addNameString,
-                           { tooltipClass: 'intro-points-describe' }
-                       );
-                   }
-               }, 400);

 
 

-               context.history().on('change.intro', function() {
-                   continueTo(addCloseEditor);
-               });
+             if (tooltipBox.top + tooltipBox.height > h) {
+               tooltipBox.height -= tooltipBox.top + tooltipBox.height - h;
+             }

 
 

-               context.on('exit.intro', function() {
-                   // if user leaves select mode here, just continue with the tutorial.
-                   continueTo(reselectPoint);
-               });
+             if (tooltipBox.left + tooltipBox.width > w) {
+               tooltipBox.width -= tooltipBox.left + tooltipBox.width - w;
+             } // determine tooltip placement..

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
-           }

 
 

+             if (tooltipBox.top + tooltipBox.height < 100) {
+               // tooltip below box..
+               side = 'bottom';
+               pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top + tooltipBox.height];
+             } else if (tooltipBox.top > h - 140) {
+               // tooltip above box..
+               side = 'top';
+               pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top - tip.height];
+             } else {
+               // tooltip to the side of the tooltipBox..
+               var tipY = tooltipBox.top + tooltipBox.height / 2 - tip.height / 2;

 
 

-           function addCloseEditor() {
-               // reset pane, in case user happened to change it..
-               context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+               if (_mainLocalizer.textDirection() === 'rtl') {
+                 if (tooltipBox.left - tooltipWidth - tooltipArrow < 70) {
+                   side = 'right';
+                   pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+                 } else {
+                   side = 'left';
+                   pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
+                 }
+               } else {
+                 if (tooltipBox.left + tooltipBox.width + tooltipArrow + tooltipWidth > w - 70) {
+                   side = 'left';
+                   pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
+                 } else {
+                   side = 'right';
+                   pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+                 }
+               }
+             }

 
 

-               var selector = '.entity-editor-pane button.close svg use';
-               var href = select(selector).attr('href') || '#iD-icon-close';
+             if (options.duration !== 0 || !tooltip.classed(side)) {
+               tooltip.call(uiToggle(true));
+             }

 
 

-               context.on('exit.intro', function() {
-                   continueTo(reselectPoint);
-               });
+             tooltip.style('top', pos[1] + 'px').style('left', pos[0] + 'px').attr('class', classes + ' ' + side); // shift popover-inner if it is very close to the top or bottom edge
+             // (doesn't affect the placement of the popover-arrow)

 
 

-               reveal('.entity-editor-pane',
-                   helpString('intro.points.add_close', { button: icon(href, 'pre-text') })
-               );
+             var shiftY = 0;

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   nextStep();
+             if (side === 'left' || side === 'right') {
+               if (pos[1] < 60) {
+                 shiftY = 60 - pos[1];
+               } else if (pos[1] + tip.height > h - 100) {
+                 shiftY = h - pos[1] - tip.height - 100;

                }
                }

+             }
+
+             tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
+           } else {
+             tooltip.classed('in', false).call(uiToggle(false));

            }
 
            }
 

+           curtain.cut(box, options.duration);
+           return tooltip;
+         };

 
 

-           function reselectPoint() {
-               if (!_pointID) { return chapter.restart(); }
-               var entity = context.hasEntity(_pointID);
-               if (!entity) { return chapter.restart(); }
+         curtain.cut = function (datum, duration) {
+           darkness.datum(datum).interrupt();
+           var selection;

 
 

-               // make sure it's still a cafe, in case user somehow changed it..
-               var oldPreset = _mainPresetIndex.match(entity, context.graph());
-               context.replace(actionChangePreset(_pointID, oldPreset, cafePreset));
+           if (duration === 0) {
+             selection = darkness;
+           } else {
+             selection = darkness.transition().duration(duration || 600).ease(linear$1);
+           }

 
 

-               context.enter(modeBrowse(context));
+           selection.attr('d', function (d) {
+             var containerWidth = containerNode.clientWidth;
+             var containerHeight = containerNode.clientHeight;
+             var string = 'M 0,0 L 0,' + containerHeight + ' L ' + containerWidth + ',' + containerHeight + 'L' + containerWidth + ',0 Z';
+             if (!d) return string;
+             return string + 'M' + d.left + ',' + d.top + 'L' + d.left + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + d.top + 'Z';
+           });
+         };

 
 

-               var msec = transitionTime(entity.loc, context.map().center());
-               if (msec) { reveal(null, null, { duration: 0 }); }
-               context.map().centerEase(entity.loc, msec);
+         curtain.remove = function () {
+           surface.remove();
+           tooltip.remove();
+           select(window).on('resize.curtain', null);
+         }; // ClientRects are immutable, so copy them to an object,
+         // in case we need to trim the height/width.

 
 

-               timeout(function() {
-                   var box = pointBox(entity.loc, context);
-                   reveal(box, helpString('intro.points.reselect'), { duration: 600 });

 
 

-                   timeout(function() {
-                       context.map().on('move.intro drawn.intro', function() {
-                           var entity = context.hasEntity(_pointID);
-                           if (!entity) { return chapter.restart(); }
-                           var box = pointBox(entity.loc, context);
-                           reveal(box, helpString('intro.points.reselect'), { duration: 0 });
-                       });
-                   }, 600); // after reveal..
+         function copyBox(src) {
+           return {
+             top: src.top,
+             right: src.right,
+             bottom: src.bottom,
+             left: src.left,
+             width: src.width,
+             height: src.height
+           };
+         }

 
 

-                   context.on('enter.intro', function(mode) {
-                       if (mode.id !== 'select') { return; }
-                       continueTo(updatePoint);
-                   });
+         return curtain;
+       }

 
 

-               }, msec + 100);
+       function uiIntroWelcome(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var chapter = {
+           title: 'intro.welcome.title'
+         };

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
-           }
+         function welcome() {
+           context.map().centerZoom([-85.63591, 41.94285], 19);
+           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.welcome'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: practice
+           });
+         }

 
 

+         function practice() {
+           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: words
+           });
+         }

 
 

-           function updatePoint() {
-               if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-                   return continueTo(reselectPoint);
-               }
+         function words() {
+           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: chapters
+           });
+         }

 
 

-               // reset pane, in case user happened to untag the point..
-               context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+         function chapters() {
+           dispatch.call('done');
+           reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
+             next: _t('intro.navigation.title')
+           }));
+         }

 
 

-               context.on('exit.intro', function() {
-                   continueTo(reselectPoint);
-               });
+         chapter.enter = function () {
+           welcome();
+         };

 
 

-               context.history().on('change.intro', function() {
-                   continueTo(updateCloseEditor);
-               });
+         chapter.exit = function () {
+           context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
+         };
+
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };

 
 

-               timeout(function() {
-                   reveal('.entity-editor-pane', helpString('intro.points.update'),
-                       { tooltipClass: 'intro-points-describe' }
-                   );
-               }, 400);
+         return utilRebind(chapter, dispatch, 'on');
+       }

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
-           }
+       function uiIntroNavigation(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var timeouts = [];
+         var hallId = 'n2061';
+         var townHall = [-85.63591, 41.94285];
+         var springStreetId = 'w397';
+         var springStreetEndId = 'n1834';
+         var springStreet = [-85.63582, 41.94255];
+         var onewayField = _mainPresetIndex.field('oneway');
+         var maxspeedField = _mainPresetIndex.field('maxspeed');
+         var chapter = {
+           title: 'intro.navigation.title'
+         };

 
 

+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }

 
 

-           function updateCloseEditor() {
-               if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-                   return continueTo(reselectPoint);
-               }
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }

 
 

-               // reset pane, in case user happened to change it..
-               context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+         function isTownHallSelected() {
+           var ids = context.selectedIDs();
+           return ids.length === 1 && ids[0] === hallId;
+         }

 
 

-               context.on('exit.intro', function() {
-                   continueTo(rightClickPoint);
-               });
+         function dragMap() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var msec = transitionTime(townHall, context.map().center());

 
 

-               timeout(function() {
-                   reveal('.entity-editor-pane',
-                       helpString('intro.points.update_close', { button: icon('#iD-icon-close', 'pre-text') })
-                   );
-               }, 500);
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
+
+           context.map().centerZoomEase(townHall, 19, msec);
+           timeout(function () {
+             var centerStart = context.map().center();
+             var textId = context.lastPointerType() === 'mouse' ? 'drag' : 'drag_touch';
+             var dragString = helpHtml('intro.navigation.map_info') + '{br}' + helpHtml('intro.navigation.' + textId);
+             reveal('.surface', dragString);
+             context.map().on('drawn.intro', function () {
+               reveal('.surface', dragString, {
+                 duration: 0
+               });
+             });
+             context.map().on('move.intro', function () {
+               var centerNow = context.map().center();

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   nextStep();
+               if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
+                 context.map().on('move.intro', null);
+                 timeout(function () {
+                   continueTo(zoomMap);
+                 }, 3000);

                }
                }

+             });
+           }, msec + 100);
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function zoomMap() {
+           var zoomStart = context.map().zoom();
+           var textId = context.lastPointerType() === 'mouse' ? 'zoom' : 'zoom_touch';
+           var zoomString = helpHtml('intro.navigation.' + textId);
+           reveal('.surface', zoomString);
+           context.map().on('drawn.intro', function () {
+             reveal('.surface', zoomString, {
+               duration: 0
+             });
+           });
+           context.map().on('move.intro', function () {
+             if (context.map().zoom() !== zoomStart) {
+               context.map().on('move.intro', null);
+               timeout(function () {
+                 continueTo(features);
+               }, 3000);
+             }
+           });

 
 

-           function rightClickPoint() {
-               if (!_pointID) { return chapter.restart(); }
-               var entity = context.hasEntity(_pointID);
-               if (!entity) { return chapter.restart(); }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
+         }

 
 

-               context.enter(modeBrowse(context));
+         function features() {
+           var onClick = function onClick() {
+             continueTo(pointsLinesAreas);
+           };

 
 

-               var box = pointBox(entity.loc, context);
-               var textId = context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch';
-               reveal(box, helpString('intro.points.' + textId), { duration: 600 });
-
-               timeout(function() {
-                   context.map().on('move.intro', function() {
-                       var entity = context.hasEntity(_pointID);
-                       if (!entity) { return chapter.restart(); }
-                       var box = pointBox(entity.loc, context);
-                       reveal(box, helpString('intro.points.' + textId), { duration: 0 });
-                   });
-               }, 600); // after reveal
-
-               context.on('enter.intro', function(mode) {
-                   if (mode.id !== 'select') { return; }
-                   var ids = context.selectedIDs();
-                   if (ids.length !== 1 || ids[0] !== _pointID) { return; }
-
-                   timeout(function() {
-                       var node = selectMenuItem(context, 'delete').node();
-                       if (!node) { return; }
-                       continueTo(enterDelete);
-                   }, 50);  // after menu visible
-               });
+           reveal('.surface', helpHtml('intro.navigation.features'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.map().on('drawn.intro', function () {
+             reveal('.surface', helpHtml('intro.navigation.features'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: onClick
+             });
+           });

 
 

-               function continueTo(nextStep) {
-                   context.on('enter.intro', null);
-                   context.map().on('move.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             context.map().on('drawn.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function pointsLinesAreas() {
+           var onClick = function onClick() {
+             continueTo(nodesWays);
+           };

 
 

-           function enterDelete() {
-               if (!_pointID) { return chapter.restart(); }
-               var entity = context.hasEntity(_pointID);
-               if (!entity) { return chapter.restart(); }
+           reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.map().on('drawn.intro', function () {
+             reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: onClick
+             });
+           });

 
 

-               var node = selectMenuItem(context, 'delete').node();
-               if (!node) { return continueTo(rightClickPoint); }
+           function continueTo(nextStep) {
+             context.map().on('drawn.intro', null);
+             nextStep();
+           }
+         }

 
 

-               reveal('.edit-menu',
-                   helpString('intro.points.delete'),
-                   { padding: 50 }
-               );
+         function nodesWays() {
+           var onClick = function onClick() {
+             continueTo(clickTownHall);
+           };

 
 

-               timeout(function() {
-                   context.map().on('move.intro', function() {
-                       reveal('.edit-menu',
-                           helpString('intro.points.delete'),
-                           { duration: 0,  padding: 50 }
-                       );
-                   });
-               }, 300); // after menu visible
+           reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.map().on('drawn.intro', function () {
+             reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: onClick
+             });
+           });

 
 

-               context.on('exit.intro', function() {
-                   if (!_pointID) { return chapter.restart(); }
-                   var entity = context.hasEntity(_pointID);
-                   if (entity) { return continueTo(rightClickPoint); }  // point still exists
-               });
+           function continueTo(nextStep) {
+             context.map().on('drawn.intro', null);
+             nextStep();
+           }
+         }

 
 

-               context.history().on('change.intro', function(changed) {
-                   if (changed.deleted().length) {
-                       continueTo(undo);
-                   }
+         function clickTownHall() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var entity = context.hasEntity(hallId);
+           if (!entity) return;
+           reveal(null, null, {
+             duration: 0
+           });
+           context.map().centerZoomEase(entity.loc, 19, 500);
+           timeout(function () {
+             var entity = context.hasEntity(hallId);
+             if (!entity) return;
+             var box = pointBox(entity.loc, context);
+             var textId = context.lastPointerType() === 'mouse' ? 'click_townhall' : 'tap_townhall';
+             reveal(box, helpHtml('intro.navigation.' + textId));
+             context.map().on('move.intro drawn.intro', function () {
+               var entity = context.hasEntity(hallId);
+               if (!entity) return;
+               var box = pointBox(entity.loc, context);
+               reveal(box, helpHtml('intro.navigation.' + textId), {
+                 duration: 0

                });
                });

+             });
+             context.on('enter.intro', function () {
+               if (isTownHallSelected()) continueTo(selectedTownHall);
+             });
+           }, 550); // after centerZoomEase

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro', null);
-                   context.history().on('change.intro', null);
-                   context.on('exit.intro', null);
-                   nextStep();
-               }
-           }
-
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(hallId)) {
+               continueTo(clickTownHall);
+             }
+           });

 
 

-           function undo() {
-               context.history().on('change.intro', function() {
-                   continueTo(play);
-               });
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }

 
 

-               reveal('.top-toolbar button.undo-button',
-                   helpString('intro.points.undo')
-               );
+         function selectedTownHall() {
+           if (!isTownHallSelected()) return clickTownHall();
+           var entity = context.hasEntity(hallId);
+           if (!entity) return clickTownHall();
+           var box = pointBox(entity.loc, context);

 
 

-               function continueTo(nextStep) {
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
-           }
+           var onClick = function onClick() {
+             continueTo(editorTownHall);
+           };

 
 

+           reveal(box, helpHtml('intro.navigation.selected_townhall'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             var entity = context.hasEntity(hallId);
+             if (!entity) return;
+             var box = pointBox(entity.loc, context);
+             reveal(box, helpHtml('intro.navigation.selected_townhall'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: onClick
+             });
+           });
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(hallId)) {
+               continueTo(clickTownHall);
+             }
+           });

 
 

-           function play() {
-               dispatch$1.call('done');
-               reveal('.ideditor',
-                   helpString('intro.points.play', { next: _t('intro.areas.title') }), {
-                       tooltipBox: '.intro-nav-wrap .chapter-area',
-                       buttonText: _t('intro.ok'),
-                       buttonCallback: function() { reveal('.ideditor'); }
-                   }
-               );
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function editorTownHall() {
+           if (!isTownHallSelected()) return clickTownHall(); // disallow scrolling

 
 

-           chapter.enter = function() {
-               addPoint();
-           };
-
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);

 
 

-           chapter.exit = function() {
-               timeouts.forEach(window.clearTimeout);
-               context.on('enter.intro exit.intro', null);
-               context.map().on('move.intro drawn.intro', null);
-               context.history().on('change.intro', null);
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-               context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+           var onClick = function onClick() {
+             continueTo(presetTownHall);

            };
 
            };
 

+           reveal('.entity-editor-pane', helpHtml('intro.navigation.editor_townhall'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.on('exit.intro', function () {
+             continueTo(clickTownHall);
+           });
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(hallId)) {
+               continueTo(clickTownHall);
+             }
+           });

 
 

-           chapter.restart = function() {
-               chapter.exit();
-               chapter.enter();
-           };
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             nextStep();
+           }
+         }

 
 

+         function presetTownHall() {
+           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..

 
 

-           return utilRebind(chapter, dispatch$1, 'on');
-       }
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling

 
 

-       function uiIntroArea(context, reveal) {
-           var dispatch$1 = dispatch('done');
-           var playground = [-85.63552, 41.94159];
-           var playgroundPreset = _mainPresetIndex.item('leisure/playground');
-           var nameField = _mainPresetIndex.field('name');
-           var descriptionField = _mainPresetIndex.field('description');
-           var timeouts = [];
-           var _areaID;
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel); // preset match, in case the user happened to change it.

 
 

+           var entity = context.entity(context.selectedIDs()[0]);
+           var preset = _mainPresetIndex.match(entity, context.graph());

 
 

-           var chapter = {
-               title: 'intro.areas.title'
+           var onClick = function onClick() {
+             continueTo(fieldsTownHall);

            };
 
            };
 

+           reveal('.entity-editor-pane .section-feature-type', helpHtml('intro.navigation.preset_townhall', {
+             preset: preset.name()
+           }), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.on('exit.intro', function () {
+             continueTo(clickTownHall);
+           });
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(hallId)) {
+               continueTo(clickTownHall);
+             }
+           });

 
 

-           function timeout(f, t) {
-               timeouts.push(window.setTimeout(f, t));
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             nextStep();

            }
            }

+         }
+
+         function fieldsTownHall() {
+           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
+
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
+
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);

 
 

+           var onClick = function onClick() {
+             continueTo(closeTownHall);
+           };
+
+           reveal('.entity-editor-pane .section-preset-fields', helpHtml('intro.navigation.fields_townhall'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.on('exit.intro', function () {
+             continueTo(clickTownHall);
+           });
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(hallId)) {
+               continueTo(clickTownHall);
+             }
+           });

 
 

-           function eventCancel() {
-               event.stopPropagation();
-               event.preventDefault();
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function closeTownHall() {
+           if (!isTownHallSelected()) return clickTownHall();
+           var selector = '.entity-editor-pane button.close svg use';
+           var href = select(selector).attr('href') || '#iD-icon-close';
+           reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
+             button: icon(href, 'inline')
+           }));
+           context.on('exit.intro', function () {
+             continueTo(searchStreet);
+           });
+           context.history().on('change.intro', function () {
+             // update the close icon in the tooltip if the user edits something.
+             var selector = '.entity-editor-pane button.close svg use';
+             var href = select(selector).attr('href') || '#iD-icon-close';
+             reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
+               button: icon(href, 'inline')
+             }), {
+               duration: 0
+             });
+           });

 
 

-           function revealPlayground(center, text, options) {
-               var padding = 180 * Math.pow(2, context.map().zoom() - 19.5);
-               var box = pad(center, padding, context);
-               reveal(box, text, options);
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function searchStreet() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial'); // ensure spring street exists

 
 

-           function addArea() {
-               context.enter(modeBrowse(context));
-               context.history().reset('initial');
-               _areaID = null;
-
-               var msec = transitionTime(playground, context.map().center());
-               if (msec) { reveal(null, null, { duration: 0 }); }
-               context.map().centerZoomEase(playground, 19, msec);
-
-               timeout(function() {
-                   var tooltip = reveal('button.add-area',
-                       helpString('intro.areas.add_playground'));
-
-                   tooltip.selectAll('.popover-inner')
-                       .insert('svg', 'span')
-                       .attr('class', 'tooltip-illustration')
-                       .append('use')
-                       .attr('xlink:href', '#iD-graphic-areas');
-
-                   context.on('enter.intro', function(mode) {
-                       if (mode.id !== 'add-area') { return; }
-                       continueTo(startPlayground);
-                   });
-               }, msec + 100);
+           var msec = transitionTime(springStreet, context.map().center());

 
 

-               function continueTo(nextStep) {
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });

            }
 
            }
 

+           context.map().centerZoomEase(springStreet, 19, msec); // ..and user can see it

 
 

-           function startPlayground() {
-               if (context.mode().id !== 'add-area') {
-                   return chapter.restart();
-               }
+           timeout(function () {
+             reveal('.search-header input', helpHtml('intro.navigation.search_street', {
+               name: _t('intro.graph.name.spring-street')
+             }));
+             context.container().select('.search-header input').on('keyup.intro', checkSearchResult);
+           }, msec + 100);
+         }

 
 

-               _areaID = null;
-               context.map().zoomEase(19.5, 500);
+         function checkSearchResult() {
+           var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item

 
 

-               timeout(function() {
-                   var textId = context.lastPointerType() === 'mouse' ? 'starting_node_click' : 'starting_node_tap';
-                   var startDrawString = helpString('intro.areas.start_playground') + helpString('intro.areas.' + textId);
-                   revealPlayground(playground,
-                       startDrawString, { duration: 250 }
-                   );
+           var firstName = first.select('.entity-name');
+           var name = _t('intro.graph.name.spring-street');

 
 

-                   timeout(function() {
-                       context.map().on('move.intro drawn.intro', function() {
-                           revealPlayground(playground,
-                               startDrawString, { duration: 0 }
-                           );
-                       });
-                       context.on('enter.intro', function(mode) {
-                           if (mode.id !== 'draw-area') { return chapter.restart(); }
-                           continueTo(continuePlayground);
-                       });
-                   }, 250);  // after reveal
+           if (!firstName.empty() && firstName.html() === name) {
+             reveal(first.node(), helpHtml('intro.navigation.choose_street', {
+               name: name
+             }), {
+               duration: 300
+             });
+             context.on('exit.intro', function () {
+               continueTo(selectedStreet);
+             });
+             context.container().select('.search-header input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+           }

 
 

-               }, 550);  // after easing
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
+             nextStep();
+           }
+         }

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
+         function selectedStreet() {
+           if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+             return searchStreet();

            }
 
            }
 

+           var onClick = function onClick() {
+             continueTo(editorStreet);
+           };
+
+           var entity = context.entity(springStreetEndId);
+           var box = pointBox(entity.loc, context);
+           box.height = 500;
+           reveal(box, helpHtml('intro.navigation.selected_street', {
+             name: _t('intro.graph.name.spring-street')
+           }), {
+             duration: 600,
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           timeout(function () {
+             context.map().on('move.intro drawn.intro', function () {
+               var entity = context.hasEntity(springStreetEndId);
+               if (!entity) return;
+               var box = pointBox(entity.loc, context);
+               box.height = 500;
+               reveal(box, helpHtml('intro.navigation.selected_street', {
+                 name: _t('intro.graph.name.spring-street')
+               }), {
+                 duration: 0,
+                 buttonText: _t.html('intro.ok'),
+                 buttonCallback: onClick
+               });
+             });
+           }, 600); // after reveal.

 
 

-           function continuePlayground() {
-               if (context.mode().id !== 'draw-area') {
-                   return chapter.restart();
-               }
+           context.on('enter.intro', function (mode) {
+             if (!context.hasEntity(springStreetId)) {
+               return continueTo(searchStreet);
+             }

 
 

-               _areaID = null;
-               revealPlayground(playground,
-                   helpString('intro.areas.continue_playground'),
-                   { duration: 250 }
-               );
+             var ids = context.selectedIDs();

 
 

-               timeout(function() {
-                   context.map().on('move.intro drawn.intro', function() {
-                       revealPlayground(playground,
-                           helpString('intro.areas.continue_playground'),
-                           { duration: 0 }
-                       );
-                   });
-               }, 250);  // after reveal
+             if (mode.id !== 'select' || !ids.length || ids[0] !== springStreetId) {
+               // keep Spring Street selected..
+               context.enter(modeSelect(context, [springStreetId]));
+             }
+           });
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+               timeout(function () {
+                 continueTo(searchStreet);
+               }, 300); // after any transition (e.g. if user deleted intersection)
+             }
+           });

 
 

-               context.on('enter.intro', function(mode) {
-                   if (mode.id === 'draw-area') {
-                       var entity = context.hasEntity(context.selectedIDs()[0]);
-                       if (entity && entity.nodes.length >= 6) {
-                           return continueTo(finishPlayground);
-                       } else {
-                           return;
-                       }
-                   } else if (mode.id === 'select') {
-                       _areaID = context.selectedIDs()[0];
-                       return continueTo(searchPresets);
-                   } else {
-                       return chapter.restart();
-                   }
-               });
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
+         function editorStreet() {
+           var selector = '.entity-editor-pane button.close svg use';
+           var href = select(selector).attr('href') || '#iD-icon-close';
+           reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
+             button: icon(href, 'inline'),
+             field1: onewayField.label(),
+             field2: maxspeedField.label()
+           }));
+           context.on('exit.intro', function () {
+             continueTo(play);
+           });
+           context.history().on('change.intro', function () {
+             // update the close icon in the tooltip if the user edits something.
+             var selector = '.entity-editor-pane button.close svg use';
+             var href = select(selector).attr('href') || '#iD-icon-close';
+             reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
+               button: icon(href, 'inline'),
+               field1: onewayField.label(),
+               field2: maxspeedField.label()
+             }), {
+               duration: 0
+             });
+           });
+
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function play() {
+           dispatch.call('done');
+           reveal('.ideditor', helpHtml('intro.navigation.play', {
+             next: _t('intro.points.title')
+           }), {
+             tooltipBox: '.intro-nav-wrap .chapter-point',
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               reveal('.ideditor');
+             }
+           });
+         }

 
 

-           function finishPlayground() {
-               if (context.mode().id !== 'draw-area') {
-                   return chapter.restart();
-               }
+         chapter.enter = function () {
+           dragMap();
+         };

 
 

-               _areaID = null;
+         chapter.exit = function () {
+           timeouts.forEach(window.clearTimeout);
+           context.on('enter.intro exit.intro', null);
+           context.map().on('move.intro drawn.intro', null);
+           context.history().on('change.intro', null);
+           context.container().select('.inspector-wrap').on('wheel.intro', null);
+           context.container().select('.search-header input').on('keydown.intro keyup.intro', null);
+         };

 
 

-               var finishString = helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-                   helpString('intro.areas.finish_playground');
-               revealPlayground(playground,
-                   finishString, { duration: 250 }
-               );
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };

 
 

-               timeout(function() {
-                   context.map().on('move.intro drawn.intro', function() {
-                       revealPlayground(playground,
-                           finishString, { duration: 0 }
-                       );
-                   });
-               }, 250);  // after reveal
+         return utilRebind(chapter, dispatch, 'on');
+       }

 
 

-               context.on('enter.intro', function(mode) {
-                   if (mode.id === 'draw-area') {
-                       return;
-                   } else if (mode.id === 'select') {
-                       _areaID = context.selectedIDs()[0];
-                       return continueTo(searchPresets);
-                   } else {
-                       return chapter.restart();
-                   }
-               });
+       function uiIntroPoint(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var timeouts = [];
+         var intersection = [-85.63279, 41.94394];
+         var building = [-85.632422, 41.944045];
+         var cafePreset = _mainPresetIndex.item('amenity/cafe');
+         var _pointID = null;
+         var chapter = {
+           title: 'intro.points.title'
+         };

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
-           }
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }

 
 

+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }

 
 

-           function searchPresets() {
-               if (!_areaID || !context.hasEntity(_areaID)) {
-                   return addArea();
-               }
-               var ids = context.selectedIDs();
-               if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-                   context.enter(modeSelect(context, [_areaID]));
-               }
+         function addPoint() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var msec = transitionTime(intersection, context.map().center());

 
 

-               // disallow scrolling
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }

 
 

-               timeout(function() {
-                   // reset pane, in case user somehow happened to change it..
-                   context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+           context.map().centerZoomEase(intersection, 19, msec);
+           timeout(function () {
+             var tooltip = reveal('button.add-point', helpHtml('intro.points.points_info') + '{br}' + helpHtml('intro.points.add_point'));
+             _pointID = null;
+             tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-points');
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'add-point') return;
+               continueTo(placePoint);
+             });
+           }, msec + 100);

 
 

-                   context.container().select('.preset-search-input')
-                       .on('keydown.intro', null)
-                       .on('keyup.intro', checkPresetSearch);
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-                   reveal('.preset-search-input',
-                       helpString('intro.areas.search_playground', { preset: playgroundPreset.name() })
-                   );
-               }, 400);  // after preset list pane visible..
+         function placePoint() {
+           if (context.mode().id !== 'add-point') {
+             return chapter.restart();
+           }

 
 

-               context.on('enter.intro', function(mode) {
-                   if (!_areaID || !context.hasEntity(_areaID)) {
-                       return continueTo(addArea);
-                   }
+           var pointBox = pad(building, 150, context);
+           var textId = context.lastPointerType() === 'mouse' ? 'place_point' : 'place_point_touch';
+           reveal(pointBox, helpHtml('intro.points.' + textId));
+           context.map().on('move.intro drawn.intro', function () {
+             pointBox = pad(building, 150, context);
+             reveal(pointBox, helpHtml('intro.points.' + textId), {
+               duration: 0
+             });
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'select') return chapter.restart();
+             _pointID = context.mode().selectedIDs()[0];
+             continueTo(searchPreset);
+           });

 
 

-                   var ids = context.selectedIDs();
-                   if (mode.id !== 'select' || !ids.length || ids[0] !== _areaID) {
-                       // keep the user's area selected..
-                       context.enter(modeSelect(context, [_areaID]));
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-                       // reset pane, in case user somehow happened to change it..
-                       context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
-                       // disallow scrolling
-                       context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+         function searchPreset() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return addPoint();
+           } // disallow scrolling

 
 

-                       context.container().select('.preset-search-input')
-                           .on('keydown.intro', null)
-                           .on('keyup.intro', checkPresetSearch);

 
 

-                       reveal('.preset-search-input',
-                           helpString('intro.areas.search_playground', { preset: playgroundPreset.name() })
-                       );
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+           reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
+             preset: cafePreset.name()
+           }));
+           context.on('enter.intro', function (mode) {
+             if (!_pointID || !context.hasEntity(_pointID)) {
+               return continueTo(addPoint);
+             }

 
 

-                       context.history().on('change.intro', null);
-                   }
-               });
+             var ids = context.selectedIDs();

 
 

-               function checkPresetSearch() {
-                   var first = context.container().select('.preset-list-item:first-child');
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
+               // keep the user's point selected..
+               context.enter(modeSelect(context, [_pointID])); // disallow scrolling

 
 

-                   if (first.classed('preset-leisure-playground')) {
-                       reveal(first.select('.preset-list-button').node(),
-                           helpString('intro.areas.choose_playground', { preset: playgroundPreset.name() }),
-                           { duration: 300 }
-                       );
+               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+               context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+               reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
+                 preset: cafePreset.name()
+               }));
+               context.history().on('change.intro', null);
+             }
+           });

 
 

-                       context.container().select('.preset-search-input')
-                           .on('keydown.intro', eventCancel, true)
-                           .on('keyup.intro', null);
+           function checkPresetSearch() {
+             var first = context.container().select('.preset-list-item:first-child');

 
 

-                       context.history().on('change.intro', function() {
-                           continueTo(clickAddField);
-                       });
-                   }
-               }
+             if (first.classed('preset-amenity-cafe')) {
+               context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+               reveal(first.select('.preset-list-button').node(), helpHtml('intro.points.choose_cafe', {
+                 preset: cafePreset.name()
+               }), {
+                 duration: 300
+               });
+               context.history().on('change.intro', function () {
+                 continueTo(aboutFeatureEditor);
+               });
+             }
+           }

 
 

-               function continueTo(nextStep) {
-                   context.container().select('.inspector-wrap').on('wheel.intro', null);
-                   context.on('enter.intro', null);
-                   context.history().on('change.intro', null);
-                   context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function aboutFeatureEditor() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return addPoint();
+           }

 
 

-           function clickAddField() {
-               if (!_areaID || !context.hasEntity(_areaID)) {
-                   return addArea();
-               }
-               var ids = context.selectedIDs();
-               if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-                   return searchPresets();
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.points.feature_editor'), {
+               tooltipClass: 'intro-points-describe',
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: function buttonCallback() {
+                 continueTo(addName);

                }
                }

+             });
+           }, 400);
+           context.on('exit.intro', function () {
+             // if user leaves select mode here, just continue with the tutorial.
+             continueTo(reselectPoint);
+           });

 
 

-               if (!context.container().select('.form-field-description').empty()) {
-                   return continueTo(describePlayground);
-               }
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }

 
 

-               // disallow scrolling
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+         function addName() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return addPoint();
+           } // reset pane, in case user happened to change it..

 
 

-               timeout(function() {
-                   // reset pane, in case user somehow happened to change it..
-                   context.container().select('.inspector-wrap .panewrap').style('right', '0%');

 
 

-                   // It's possible for the user to add a description in a previous step..
-                   // If they did this already, just continue to next step.
-                   var entity = context.entity(_areaID);
-                   if (entity.tags.description) {
-                       return continueTo(play);
-                   }
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           var addNameString = helpHtml('intro.points.fields_info') + '{br}' + helpHtml('intro.points.add_name');
+           timeout(function () {
+             // It's possible for the user to add a name in a previous step..
+             // If so, don't tell them to add the name in this step.
+             // Give them an OK button instead.
+             var entity = context.entity(_pointID);

 
 

-                   // scroll "Add field" into view
-                   var box = context.container().select('.more-fields').node().getBoundingClientRect();
-                   if (box.top > 300) {
-                       var pane = context.container().select('.entity-editor-pane .inspector-body');
-                       var start = pane.node().scrollTop;
-                       var end = start + (box.top - 300);
-
-                       pane
-                           .transition()
-                           .duration(250)
-                           .tween('scroll.inspector', function() {
-                               var node = this;
-                               var i = d3_interpolateNumber(start, end);
-                               return function(t) {
-                                   node.scrollTop = i(t);
-                               };
-                           });
-                   }
+             if (entity.tags.name) {
+               var tooltip = reveal('.entity-editor-pane', addNameString, {
+                 tooltipClass: 'intro-points-describe',
+                 buttonText: _t.html('intro.ok'),
+                 buttonCallback: function buttonCallback() {
+                   continueTo(addCloseEditor);
+                 }
+               });
+               tooltip.select('.instruction').style('display', 'none');
+             } else {
+               reveal('.entity-editor-pane', addNameString, {
+                 tooltipClass: 'intro-points-describe'
+               });
+             }
+           }, 400);
+           context.history().on('change.intro', function () {
+             continueTo(addCloseEditor);
+           });
+           context.on('exit.intro', function () {
+             // if user leaves select mode here, just continue with the tutorial.
+             continueTo(reselectPoint);
+           });

 
 

-                   timeout(function() {
-                       reveal('.more-fields .combobox-input',
-                           helpString('intro.areas.add_field', {
-                               name: nameField.label(),
-                               description: descriptionField.label()
-                           }),
-                           { duration: 300 }
-                       );
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }

 
 

-                       context.container().select('.more-fields .combobox-input')
-                           .on('click.intro', function() {
-                               // Watch for the combobox to appear...
-                               var watcher;
-                               watcher = window.setInterval(function() {
-                                   if (!context.container().select('div.combobox').empty()) {
-                                       window.clearInterval(watcher);
-                                       continueTo(chooseDescriptionField);
-                                   }
-                               }, 300);
-                           });
-                   }, 300);  // after "Add Field" visible
+         function addCloseEditor() {
+           // reset pane, in case user happened to change it..
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           var selector = '.entity-editor-pane button.close svg use';
+           var href = select(selector).attr('href') || '#iD-icon-close';
+           context.on('exit.intro', function () {
+             continueTo(reselectPoint);
+           });
+           reveal('.entity-editor-pane', helpHtml('intro.points.add_close', {
+             button: icon(href, 'inline')
+           }));
+
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }

 
 

-               }, 400);  // after editor pane visible
+         function reselectPoint() {
+           if (!_pointID) return chapter.restart();
+           var entity = context.hasEntity(_pointID);
+           if (!entity) return chapter.restart(); // make sure it's still a cafe, in case user somehow changed it..

 
 

-               context.on('exit.intro', function() {
-                   return continueTo(searchPresets);
-               });
+           var oldPreset = _mainPresetIndex.match(entity, context.graph());
+           context.replace(actionChangePreset(_pointID, oldPreset, cafePreset));
+           context.enter(modeBrowse(context));
+           var msec = transitionTime(entity.loc, context.map().center());

 
 

-               function continueTo(nextStep) {
-                   context.container().select('.inspector-wrap').on('wheel.intro', null);
-                   context.container().select('.more-fields .combobox-input').on('click.intro', null);
-                   context.on('exit.intro', null);
-                   nextStep();
-               }
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });

            }
 
            }
 

+           context.map().centerEase(entity.loc, msec);
+           timeout(function () {
+             var box = pointBox(entity.loc, context);
+             reveal(box, helpHtml('intro.points.reselect'), {
+               duration: 600
+             });
+             timeout(function () {
+               context.map().on('move.intro drawn.intro', function () {
+                 var entity = context.hasEntity(_pointID);
+                 if (!entity) return chapter.restart();
+                 var box = pointBox(entity.loc, context);
+                 reveal(box, helpHtml('intro.points.reselect'), {
+                   duration: 0
+                 });
+               });
+             }, 600); // after reveal..

 
 

-           function chooseDescriptionField() {
-               if (!_areaID || !context.hasEntity(_areaID)) {
-                   return addArea();
-               }
-               var ids = context.selectedIDs();
-               if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-                   return searchPresets();
-               }
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'select') return;
+               continueTo(updatePoint);
+             });
+           }, msec + 100);

 
 

-               if (!context.container().select('.form-field-description').empty()) {
-                   return continueTo(describePlayground);
-               }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-               // Make sure combobox is ready..
-               if (context.container().select('div.combobox').empty()) {
-                   return continueTo(clickAddField);
-               }
-               // Watch for the combobox to go away..
-               var watcher;
-               watcher = window.setInterval(function() {
-                   if (context.container().select('div.combobox').empty()) {
-                       window.clearInterval(watcher);
-                       timeout(function() {
-                           if (context.container().select('.form-field-description').empty()) {
-                               continueTo(retryChooseDescription);
-                           } else {
-                               continueTo(describePlayground);
-                           }
-                       }, 300);  // after description field added.
-                   }
-               }, 300);
+         function updatePoint() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return continueTo(reselectPoint);
+           } // reset pane, in case user happened to untag the point..

 
 

-               reveal('div.combobox',
-                   helpString('intro.areas.choose_field', { field: descriptionField.label() }),
-                   { duration: 300 }
-               );

 
 

-               context.on('exit.intro', function() {
-                   return continueTo(searchPresets);
-               });
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           context.on('exit.intro', function () {
+             continueTo(reselectPoint);
+           });
+           context.history().on('change.intro', function () {
+             continueTo(updateCloseEditor);
+           });
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.points.update'), {
+               tooltipClass: 'intro-points-describe'
+             });
+           }, 400);

 
 

-               function continueTo(nextStep) {
-                   if (watcher) { window.clearInterval(watcher); }
-                   context.on('exit.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function updateCloseEditor() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return continueTo(reselectPoint);
+           } // reset pane, in case user happened to change it..

 
 

-           function describePlayground() {
-               if (!_areaID || !context.hasEntity(_areaID)) {
-                   return addArea();
-               }
-               var ids = context.selectedIDs();
-               if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-                   return searchPresets();
-               }

 
 

-               // reset pane, in case user happened to change it..
-               context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           context.on('exit.intro', function () {
+             continueTo(rightClickPoint);
+           });
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.points.update_close', {
+               button: icon('#iD-icon-close', 'inline')
+             }));
+           }, 500);

 
 

-               if (context.container().select('.form-field-description').empty()) {
-                   return continueTo(retryChooseDescription);
-               }
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }

 
 

-               context.on('exit.intro', function() {
-                   continueTo(play);
+         function rightClickPoint() {
+           if (!_pointID) return chapter.restart();
+           var entity = context.hasEntity(_pointID);
+           if (!entity) return chapter.restart();
+           context.enter(modeBrowse(context));
+           var box = pointBox(entity.loc, context);
+           var textId = context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch';
+           reveal(box, helpHtml('intro.points.' + textId), {
+             duration: 600
+           });
+           timeout(function () {
+             context.map().on('move.intro', function () {
+               var entity = context.hasEntity(_pointID);
+               if (!entity) return chapter.restart();
+               var box = pointBox(entity.loc, context);
+               reveal(box, helpHtml('intro.points.' + textId), {
+                 duration: 0

                });
                });

+             });
+           }, 600); // after reveal

 
 

-               reveal('.entity-editor-pane',
-                   helpString('intro.areas.describe_playground', { button: icon('#iD-icon-close', 'pre-text') }),
-                   { duration: 300 }
-               );
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'select') return;
+             var ids = context.selectedIDs();
+             if (ids.length !== 1 || ids[0] !== _pointID) return;
+             timeout(function () {
+               var node = selectMenuItem(context, 'delete').node();
+               if (!node) return;
+               continueTo(enterDelete);
+             }, 50); // after menu visible
+           });

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function enterDelete() {
+           if (!_pointID) return chapter.restart();
+           var entity = context.hasEntity(_pointID);
+           if (!entity) return chapter.restart();
+           var node = selectMenuItem(context, 'delete').node();

 
 

-           function retryChooseDescription() {
-               if (!_areaID || !context.hasEntity(_areaID)) {
-                   return addArea();
-               }
-               var ids = context.selectedIDs();
-               if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-                   return searchPresets();
-               }
-
-               // reset pane, in case user happened to change it..
-               context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           if (!node) {
+             return continueTo(rightClickPoint);
+           }

 
 

-               reveal('.entity-editor-pane',
-                   helpString('intro.areas.retry_add_field', { field: descriptionField.label() }), {
-                   buttonText: _t('intro.ok'),
-                   buttonCallback: function() { continueTo(clickAddField); }
+           reveal('.edit-menu', helpHtml('intro.points.delete'), {
+             padding: 50
+           });
+           timeout(function () {
+             context.map().on('move.intro', function () {
+               reveal('.edit-menu', helpHtml('intro.points.delete'), {
+                 duration: 0,
+                 padding: 50

                });
                });

+             });
+           }, 300); // after menu visible

 
 

-               context.on('exit.intro', function() {
-                   return continueTo(searchPresets);
-               });
+           context.on('exit.intro', function () {
+             if (!_pointID) return chapter.restart();
+             var entity = context.hasEntity(_pointID);
+             if (entity) return continueTo(rightClickPoint); // point still exists
+           });
+           context.history().on('change.intro', function (changed) {
+             if (changed.deleted().length) {
+               continueTo(undo);
+             }
+           });

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             context.map().on('move.intro', null);
+             context.history().on('change.intro', null);
+             context.on('exit.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function undo() {
+           context.history().on('change.intro', function () {
+             continueTo(play);
+           });
+           reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));

 
 

-           function play() {
-               dispatch$1.call('done');
-               reveal('.ideditor',
-                   helpString('intro.areas.play', { next: _t('intro.lines.title') }), {
-                       tooltipBox: '.intro-nav-wrap .chapter-line',
-                       buttonText: _t('intro.ok'),
-                       buttonCallback: function() { reveal('.ideditor'); }
-                   }
-               );
+           function continueTo(nextStep) {
+             context.history().on('change.intro', null);
+             nextStep();

            }
            }

+         }
+
+         function play() {
+           dispatch.call('done');
+           reveal('.ideditor', helpHtml('intro.points.play', {
+             next: _t('intro.areas.title')
+           }), {
+             tooltipBox: '.intro-nav-wrap .chapter-area',
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               reveal('.ideditor');
+             }
+           });
+         }

 
 

+         chapter.enter = function () {
+           addPoint();
+         };

 
 

-           chapter.enter = function() {
-               addArea();
-           };
+         chapter.exit = function () {
+           timeouts.forEach(window.clearTimeout);
+           context.on('enter.intro exit.intro', null);
+           context.map().on('move.intro drawn.intro', null);
+           context.history().on('change.intro', null);
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+         };

 
 

+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };

 
 

-           chapter.exit = function() {
-               timeouts.forEach(window.clearTimeout);
-               context.on('enter.intro exit.intro', null);
-               context.map().on('move.intro drawn.intro', null);
-               context.history().on('change.intro', null);
-               context.container().select('.inspector-wrap').on('wheel.intro', null);
-               context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-               context.container().select('.more-fields .combobox-input').on('click.intro', null);
-           };
+         return utilRebind(chapter, dispatch, 'on');
+       }

 
 

+       function uiIntroArea(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var playground = [-85.63552, 41.94159];
+         var playgroundPreset = _mainPresetIndex.item('leisure/playground');
+         var nameField = _mainPresetIndex.field('name');
+         var descriptionField = _mainPresetIndex.field('description');
+         var timeouts = [];

 
 

-           chapter.restart = function() {
-               chapter.exit();
-               chapter.enter();
-           };
+         var _areaID;

 
 

+         var chapter = {
+           title: 'intro.areas.title'
+         };

 
 

-           return utilRebind(chapter, dispatch$1, 'on');
-       }
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }

 
 

-       function uiIntroLine(context, reveal) {
-           var dispatch$1 = dispatch('done');
-           var timeouts = [];
-           var _tulipRoadID = null;
-           var flowerRoadID = 'w646';
-           var tulipRoadStart = [-85.6297754121684, 41.95805253325314];
-           var tulipRoadMidpoint = [-85.62975395449628, 41.95787501510204];
-           var tulipRoadIntersection = [-85.62974496187628, 41.95742515554585];
-           var roadCategory = _mainPresetIndex.item('category-road_minor');
-           var residentialPreset = _mainPresetIndex.item('highway/residential');
-           var woodRoadID = 'w525';
-           var woodRoadEndID = 'n2862';
-           var woodRoadAddNode = [-85.62390110349587, 41.95397111462291];
-           var woodRoadDragEndpoint = [-85.623867390213, 41.95466987786487];
-           var woodRoadDragMidpoint = [-85.62386254803509, 41.95430395953872];
-           var washingtonStreetID = 'w522';
-           var twelfthAvenueID = 'w1';
-           var eleventhAvenueEndID = 'n3550';
-           var twelfthAvenueEndID = 'n5';
-           var _washingtonSegmentID = null;
-           var eleventhAvenueEnd = context.entity(eleventhAvenueEndID).loc;
-           var twelfthAvenueEnd = context.entity(twelfthAvenueEndID).loc;
-           var deleteLinesLoc = [-85.6219395542764, 41.95228033922477];
-           var twelfthAvenue = [-85.62219310052491, 41.952505413152956];
-
-
-           var chapter = {
-               title: 'intro.lines.title'
-           };
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }
+
+         function revealPlayground(center, text, options) {
+           var padding = 180 * Math.pow(2, context.map().zoom() - 19.5);
+           var box = pad(center, padding, context);
+           reveal(box, text, options);
+         }

 
 

+         function addArea() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           _areaID = null;
+           var msec = transitionTime(playground, context.map().center());

 
 

-           function timeout(f, t) {
-               timeouts.push(window.setTimeout(f, t));
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });

            }
 
            }
 

+           context.map().centerZoomEase(playground, 19, msec);
+           timeout(function () {
+             var tooltip = reveal('button.add-area', helpHtml('intro.areas.add_playground'));
+             tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-areas');
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'add-area') return;
+               continueTo(startPlayground);
+             });
+           }, msec + 100);

 
 

-           function eventCancel() {
-               event.stopPropagation();
-               event.preventDefault();
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function startPlayground() {
+           if (context.mode().id !== 'add-area') {
+             return chapter.restart();
+           }

 
 

-           function addLine() {
-               context.enter(modeBrowse(context));
-               context.history().reset('initial');
+           _areaID = null;
+           context.map().zoomEase(19.5, 500);
+           timeout(function () {
+             var textId = context.lastPointerType() === 'mouse' ? 'starting_node_click' : 'starting_node_tap';
+             var startDrawString = helpHtml('intro.areas.start_playground') + helpHtml('intro.areas.' + textId);
+             revealPlayground(playground, startDrawString, {
+               duration: 250
+             });
+             timeout(function () {
+               context.map().on('move.intro drawn.intro', function () {
+                 revealPlayground(playground, startDrawString, {
+                   duration: 0
+                 });
+               });
+               context.on('enter.intro', function (mode) {
+                 if (mode.id !== 'draw-area') return chapter.restart();
+                 continueTo(continuePlayground);
+               });
+             }, 250); // after reveal
+           }, 550); // after easing

 
 

-               var msec = transitionTime(tulipRoadStart, context.map().center());
-               if (msec) { reveal(null, null, { duration: 0 }); }
-               context.map().centerZoomEase(tulipRoadStart, 18.5, msec);
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-               timeout(function() {
-                   var tooltip = reveal('button.add-line',
-                       helpString('intro.lines.add_line'));
+         function continuePlayground() {
+           if (context.mode().id !== 'draw-area') {
+             return chapter.restart();
+           }

 
 

-                   tooltip.selectAll('.popover-inner')
-                       .insert('svg', 'span')
-                       .attr('class', 'tooltip-illustration')
-                       .append('use')
-                       .attr('xlink:href', '#iD-graphic-lines');
+           _areaID = null;
+           revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
+             duration: 250
+           });
+           timeout(function () {
+             context.map().on('move.intro drawn.intro', function () {
+               revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
+                 duration: 0
+               });
+             });
+           }, 250); // after reveal

 
 

-                   context.on('enter.intro', function(mode) {
-                       if (mode.id !== 'add-line') { return; }
-                       continueTo(startLine);
-                   });
-               }, msec + 100);
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-area') {
+               var entity = context.hasEntity(context.selectedIDs()[0]);

 
 

-               function continueTo(nextStep) {
-                   context.on('enter.intro', null);
-                   nextStep();
+               if (entity && entity.nodes.length >= 6) {
+                 return continueTo(finishPlayground);
+               } else {
+                 return;

                }
                }

+             } else if (mode.id === 'select') {
+               _areaID = context.selectedIDs()[0];
+               return continueTo(searchPresets);
+             } else {
+               return chapter.restart();
+             }
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
+
+         function finishPlayground() {
+           if (context.mode().id !== 'draw-area') {
+             return chapter.restart();

            }
 
            }
 

+           _areaID = null;
+           var finishString = helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.areas.finish_playground');
+           revealPlayground(playground, finishString, {
+             duration: 250
+           });
+           timeout(function () {
+             context.map().on('move.intro drawn.intro', function () {
+               revealPlayground(playground, finishString, {
+                 duration: 0
+               });
+             });
+           }, 250); // after reveal
+
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-area') {
+               return;
+             } else if (mode.id === 'select') {
+               _areaID = context.selectedIDs()[0];
+               return continueTo(searchPresets);
+             } else {
+               return chapter.restart();
+             }
+           });

 
 

-           function startLine() {
-               if (context.mode().id !== 'add-line') { return chapter.restart(); }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-               _tulipRoadID = null;
+         function searchPresets() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
+           }

 
 

-               var padding = 70 * Math.pow(2, context.map().zoom() - 18);
-               var box = pad(tulipRoadStart, padding, context);
-               box.height = box.height + 100;
+           var ids = context.selectedIDs();

 
 

-               var textId = context.lastPointerType() === 'mouse' ? 'start_line' : 'start_line_tap';
-               var startLineString = helpString('intro.lines.missing_road') + '{br}' +
-                   helpString('intro.lines.line_draw_info') +
-                   helpString('intro.lines.' + textId);
-               reveal(box, startLineString);
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             context.enter(modeSelect(context, [_areaID]));
+           } // disallow scrolling

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   padding = 70 * Math.pow(2, context.map().zoom() - 18);
-                   box = pad(tulipRoadStart, padding, context);
-                   box.height = box.height + 100;
-                   reveal(box, startLineString, { duration: 0 });
-               });

 
 

-               context.on('enter.intro', function(mode) {
-                   if (mode.id !== 'draw-line') { return chapter.restart(); }
-                   continueTo(drawLine);
-               });
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             // reset pane, in case user somehow happened to change it..
+             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+             context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+             reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
+               preset: playgroundPreset.name()
+             }));
+           }, 400); // after preset list pane visible..

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
-           }
+           context.on('enter.intro', function (mode) {
+             if (!_areaID || !context.hasEntity(_areaID)) {
+               return continueTo(addArea);
+             }

 
 

+             var ids = context.selectedIDs();

 
 

-           function drawLine() {
-               if (context.mode().id !== 'draw-line') { return chapter.restart(); }
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _areaID) {
+               // keep the user's area selected..
+               context.enter(modeSelect(context, [_areaID])); // reset pane, in case user somehow happened to change it..

 
 

-               _tulipRoadID = context.mode().selectedIDs()[0];
-               context.map().centerEase(tulipRoadMidpoint, 500);
+               context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling

 
 

-               timeout(function() {
-                   var padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
-                   var box = pad(tulipRoadMidpoint, padding, context);
-                   box.height = box.height * 2;
-                   reveal(box,
-                       helpString('intro.lines.intersect', { name: _t('intro.graph.name.flower-street') })
-                   );
+               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+               context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+               reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
+                 preset: playgroundPreset.name()
+               }));
+               context.history().on('change.intro', null);
+             }
+           });

 
 

-                   context.map().on('move.intro drawn.intro', function() {
-                       padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
-                       box = pad(tulipRoadMidpoint, padding, context);
-                       box.height = box.height * 2;
-                       reveal(box,
-                           helpString('intro.lines.intersect', { name: _t('intro.graph.name.flower-street') }),
-                           { duration: 0 }
-                       );
-                   });
-               }, 550);  // after easing..
+           function checkPresetSearch() {
+             var first = context.container().select('.preset-list-item:first-child');

 
 

-               context.history().on('change.intro', function() {
-                   if (isLineConnected()) {
-                       continueTo(continueLine);
-                   }
+             if (first.classed('preset-leisure-playground')) {
+               reveal(first.select('.preset-list-button').node(), helpHtml('intro.areas.choose_playground', {
+                 preset: playgroundPreset.name()
+               }), {
+                 duration: 300

                });
                });

-
-               context.on('enter.intro', function(mode) {
-                   if (mode.id === 'draw-line') {
-                       return;
-                   } else if (mode.id === 'select') {
-                       continueTo(retryIntersect);
-                       return;
-                   } else {
-                       return chapter.restart();
-                   }
+               context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+               context.history().on('change.intro', function () {
+                 continueTo(clickAddField);

                });
                });

+             }
+           }

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.history().on('change.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function clickAddField() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
+           }

 
 

-           function isLineConnected() {
-               var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
-               if (!entity) { return false; }
+           var ids = context.selectedIDs();

 
 

-               var drawNodes = context.graph().childNodes(entity);
-               return drawNodes.some(function(node) {
-                   return context.graph().parentWays(node).some(function(parent) {
-                       return parent.id === flowerRoadID;
-                   });
-               });
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();

            }
 
            }
 

+           if (!context.container().select('.form-field-description').empty()) {
+             return continueTo(describePlayground);
+           } // disallow scrolling

 
 

-           function retryIntersect() {
-               select(window).on('pointerdown.intro mousedown.intro', eventCancel, true);
-
-               var box = pad(tulipRoadIntersection, 80, context);
-               reveal(box,
-                   helpString('intro.lines.retry_intersect', { name: _t('intro.graph.name.flower-street') })
-               );

 
 

-               timeout(chapter.restart, 3000);
-           }
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             // reset pane, in case user somehow happened to change it..
+             context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // It's possible for the user to add a description in a previous step..
+             // If they did this already, just continue to next step.

 
 

+             var entity = context.entity(_areaID);

 
 

-           function continueLine() {
-               if (context.mode().id !== 'draw-line') { return chapter.restart(); }
-               var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
-               if (!entity) { return chapter.restart(); }
+             if (entity.tags.description) {
+               return continueTo(play);
+             } // scroll "Add field" into view

 
 

-               context.map().centerEase(tulipRoadIntersection, 500);

 
 

-               var continueLineText = helpString('intro.lines.continue_line') + '{br}' +
-                   helpString('intro.lines.finish_line_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-                   helpString('intro.lines.finish_road');
+             var box = context.container().select('.more-fields').node().getBoundingClientRect();

 
 

-               reveal('.surface', continueLineText);
+             if (box.top > 300) {
+               var pane = context.container().select('.entity-editor-pane .inspector-body');
+               var start = pane.node().scrollTop;
+               var end = start + (box.top - 300);
+               pane.transition().duration(250).tween('scroll.inspector', function () {
+                 var node = this;
+                 var i = d3_interpolateNumber(start, end);
+                 return function (t) {
+                   node.scrollTop = i(t);
+                 };
+               });
+             }

 
 

-               context.on('enter.intro', function(mode) {
-                   if (mode.id === 'draw-line')
-                       { return; }
-                   else if (mode.id === 'select')
-                       { return continueTo(chooseCategoryRoad); }
-                   else
-                       { return chapter.restart(); }
+             timeout(function () {
+               reveal('.more-fields .combobox-input', helpHtml('intro.areas.add_field', {
+                 name: nameField.label(),
+                 description: descriptionField.label()
+               }), {
+                 duration: 300

                });
                });

+               context.container().select('.more-fields .combobox-input').on('click.intro', function () {
+                 // Watch for the combobox to appear...
+                 var watcher;
+                 watcher = window.setInterval(function () {
+                   if (!context.container().select('div.combobox').empty()) {
+                     window.clearInterval(watcher);
+                     continueTo(chooseDescriptionField);
+                   }
+                 }, 300);
+               });
+             }, 300); // after "Add Field" visible
+           }, 400); // after editor pane visible

 
 

-               function continueTo(nextStep) {
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
-           }
+           context.on('exit.intro', function () {
+             return continueTo(searchPresets);
+           });

 
 

+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.more-fields .combobox-input').on('click.intro', null);
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }

 
 

-           function chooseCategoryRoad() {
-               if (context.mode().id !== 'select') { return chapter.restart(); }
+         function chooseDescriptionField() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
+           }

 
 

-               context.on('exit.intro', function() {
-                   return chapter.restart();
-               });
+           var ids = context.selectedIDs();

 
 

-               var button = context.container().select('.preset-category-road_minor .preset-list-button');
-               if (button.empty()) { return chapter.restart(); }
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
+           }

 
 

-               // disallow scrolling
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           if (!context.container().select('.form-field-description').empty()) {
+             return continueTo(describePlayground);
+           } // Make sure combobox is ready..

 
 

-               timeout(function() {
-                   // reset pane, in case user somehow happened to change it..
-                   context.container().select('.inspector-wrap .panewrap').style('right', '-100%');

 
 

-                   reveal(button.node(),
-                       helpString('intro.lines.choose_category_road', { category: roadCategory.name() })
-                   );
+           if (context.container().select('div.combobox').empty()) {
+             return continueTo(clickAddField);
+           } // Watch for the combobox to go away..

 
 

-                   button.on('click.intro', function() {
-                       continueTo(choosePresetResidential);
-                   });

 
 

-               }, 400);  // after editor pane visible
+           var watcher;
+           watcher = window.setInterval(function () {
+             if (context.container().select('div.combobox').empty()) {
+               window.clearInterval(watcher);
+               timeout(function () {
+                 if (context.container().select('.form-field-description').empty()) {
+                   continueTo(retryChooseDescription);
+                 } else {
+                   continueTo(describePlayground);
+                 }
+               }, 300); // after description field added.
+             }
+           }, 300);
+           reveal('div.combobox', helpHtml('intro.areas.choose_field', {
+             field: descriptionField.label()
+           }), {
+             duration: 300
+           });
+           context.on('exit.intro', function () {
+             return continueTo(searchPresets);
+           });

 
 

-               function continueTo(nextStep) {
-                   context.container().select('.inspector-wrap').on('wheel.intro', null);
-                   context.container().select('.preset-list-button').on('click.intro', null);
-                   context.on('exit.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             if (watcher) window.clearInterval(watcher);
+             context.on('exit.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function describePlayground() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
+           }

 
 

-           function choosePresetResidential() {
-               if (context.mode().id !== 'select') { return chapter.restart(); }
+           var ids = context.selectedIDs();

 
 

-               context.on('exit.intro', function() {
-                   return chapter.restart();
-               });
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
+           } // reset pane, in case user happened to change it..

 
 

-               var subgrid = context.container().select('.preset-category-road_minor .subgrid');
-               if (subgrid.empty()) { return chapter.restart(); }

 
 

-               subgrid.selectAll(':not(.preset-highway-residential) .preset-list-button')
-                   .on('click.intro', function() {
-                       continueTo(retryPresetResidential);
-                   });
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');

 
 

-               subgrid.selectAll('.preset-highway-residential .preset-list-button')
-                   .on('click.intro', function() {
-                       continueTo(nameRoad);
-                   });
+           if (context.container().select('.form-field-description').empty()) {
+             return continueTo(retryChooseDescription);
+           }

 
 

-               timeout(function() {
-                   reveal(subgrid.node(),
-                       helpString('intro.lines.choose_preset_residential', { preset: residentialPreset.name() }),
-                       { tooltipBox: '.preset-highway-residential .preset-list-button', duration: 300 }
-                   );
-               }, 300);
+           context.on('exit.intro', function () {
+             continueTo(play);
+           });
+           reveal('.entity-editor-pane', helpHtml('intro.areas.describe_playground', {
+             button: icon('#iD-icon-close', 'inline')
+           }), {
+             duration: 300
+           });

 
 

-               function continueTo(nextStep) {
-                   context.container().select('.preset-list-button').on('click.intro', null);
-                   context.on('exit.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function retryChooseDescription() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
+           }

 
 

-           // selected wrong road type
-           function retryPresetResidential() {
-               if (context.mode().id !== 'select') { return chapter.restart(); }
+           var ids = context.selectedIDs();

 
 

-               context.on('exit.intro', function() {
-                   return chapter.restart();
-               });
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
+           } // reset pane, in case user happened to change it..

 
 

-               // disallow scrolling
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);

 
 

-               timeout(function() {
-                   var button = context.container().select('.entity-editor-pane .preset-list-button');
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           reveal('.entity-editor-pane', helpHtml('intro.areas.retry_add_field', {
+             field: descriptionField.label()
+           }), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(clickAddField);
+             }
+           });
+           context.on('exit.intro', function () {
+             return continueTo(searchPresets);
+           });

 
 

-                   reveal(button.node(),
-                       helpString('intro.lines.retry_preset_residential', { preset: residentialPreset.name() })
-                   );
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }

 
 

-                   button.on('click.intro', function() {
-                       continueTo(chooseCategoryRoad);
-                   });
+         function play() {
+           dispatch.call('done');
+           reveal('.ideditor', helpHtml('intro.areas.play', {
+             next: _t('intro.lines.title')
+           }), {
+             tooltipBox: '.intro-nav-wrap .chapter-line',
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               reveal('.ideditor');
+             }
+           });
+         }

 
 

-               }, 500);
+         chapter.enter = function () {
+           addArea();
+         };

 
 

-               function continueTo(nextStep) {
-                   context.container().select('.inspector-wrap').on('wheel.intro', null);
-                   context.container().select('.preset-list-button').on('click.intro', null);
-                   context.on('exit.intro', null);
-                   nextStep();
-               }
-           }
+         chapter.exit = function () {
+           timeouts.forEach(window.clearTimeout);
+           context.on('enter.intro exit.intro', null);
+           context.map().on('move.intro drawn.intro', null);
+           context.history().on('change.intro', null);
+           context.container().select('.inspector-wrap').on('wheel.intro', null);
+           context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+           context.container().select('.more-fields .combobox-input').on('click.intro', null);
+         };

 
 

+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };

 
 

-           function nameRoad() {
-               context.on('exit.intro', function() {
-                   continueTo(didNameRoad);
-               });
+         return utilRebind(chapter, dispatch, 'on');
+       }

 
 

-               timeout(function() {
-                   reveal('.entity-editor-pane',
-                       helpString('intro.lines.name_road', { button: icon('#iD-icon-close', 'pre-text') }),
-                       { tooltipClass: 'intro-lines-name_road' }
-                   );
-               }, 500);
+       function uiIntroLine(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var timeouts = [];
+         var _tulipRoadID = null;
+         var flowerRoadID = 'w646';
+         var tulipRoadStart = [-85.6297754121684, 41.95805253325314];
+         var tulipRoadMidpoint = [-85.62975395449628, 41.95787501510204];
+         var tulipRoadIntersection = [-85.62974496187628, 41.95742515554585];
+         var roadCategory = _mainPresetIndex.item('category-road_minor');
+         var residentialPreset = _mainPresetIndex.item('highway/residential');
+         var woodRoadID = 'w525';
+         var woodRoadEndID = 'n2862';
+         var woodRoadAddNode = [-85.62390110349587, 41.95397111462291];
+         var woodRoadDragEndpoint = [-85.623867390213, 41.95466987786487];
+         var woodRoadDragMidpoint = [-85.62386254803509, 41.95430395953872];
+         var washingtonStreetID = 'w522';
+         var twelfthAvenueID = 'w1';
+         var eleventhAvenueEndID = 'n3550';
+         var twelfthAvenueEndID = 'n5';
+         var _washingtonSegmentID = null;
+         var eleventhAvenueEnd = context.entity(eleventhAvenueEndID).loc;
+         var twelfthAvenueEnd = context.entity(twelfthAvenueEndID).loc;
+         var deleteLinesLoc = [-85.6219395542764, 41.95228033922477];
+         var twelfthAvenue = [-85.62219310052491, 41.952505413152956];
+         var chapter = {
+           title: 'intro.lines.title'
+         };
+
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }
+
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }
+
+         function addLine() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var msec = transitionTime(tulipRoadStart, context.map().center());

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   nextStep();
-               }
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });

            }
 
            }
 

+           context.map().centerZoomEase(tulipRoadStart, 18.5, msec);
+           timeout(function () {
+             var tooltip = reveal('button.add-line', helpHtml('intro.lines.add_line'));
+             tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-lines');
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'add-line') return;
+               continueTo(startLine);
+             });
+           }, msec + 100);
+
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
+
+         function startLine() {
+           if (context.mode().id !== 'add-line') return chapter.restart();
+           _tulipRoadID = null;
+           var padding = 70 * Math.pow(2, context.map().zoom() - 18);
+           var box = pad(tulipRoadStart, padding, context);
+           box.height = box.height + 100;
+           var textId = context.lastPointerType() === 'mouse' ? 'start_line' : 'start_line_tap';
+           var startLineString = helpHtml('intro.lines.missing_road') + '{br}' + helpHtml('intro.lines.line_draw_info') + helpHtml('intro.lines.' + textId);
+           reveal(box, startLineString);
+           context.map().on('move.intro drawn.intro', function () {
+             padding = 70 * Math.pow(2, context.map().zoom() - 18);
+             box = pad(tulipRoadStart, padding, context);
+             box.height = box.height + 100;
+             reveal(box, startLineString, {
+               duration: 0
+             });
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'draw-line') return chapter.restart();
+             continueTo(drawLine);
+           });

 
 

-           function didNameRoad() {
-               context.history().checkpoint('doneAddLine');
-
-               timeout(function() {
-                   reveal('.surface', helpString('intro.lines.did_name_road'), {
-                       buttonText: _t('intro.ok'),
-                       buttonCallback: function() { continueTo(updateLine); }
-                   });
-               }, 500);
-
-               function continueTo(nextStep) {
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function drawLine() {
+           if (context.mode().id !== 'draw-line') return chapter.restart();
+           _tulipRoadID = context.mode().selectedIDs()[0];
+           context.map().centerEase(tulipRoadMidpoint, 500);
+           timeout(function () {
+             var padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
+             var box = pad(tulipRoadMidpoint, padding, context);
+             box.height = box.height * 2;
+             reveal(box, helpHtml('intro.lines.intersect', {
+               name: _t('intro.graph.name.flower-street')
+             }));
+             context.map().on('move.intro drawn.intro', function () {
+               padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
+               box = pad(tulipRoadMidpoint, padding, context);
+               box.height = box.height * 2;
+               reveal(box, helpHtml('intro.lines.intersect', {
+                 name: _t('intro.graph.name.flower-street')
+               }), {
+                 duration: 0
+               });
+             });
+           }, 550); // after easing..

 
 

-           function updateLine() {
-               context.history().reset('doneAddLine');
-               if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-                   return chapter.restart();
-               }
+           context.history().on('change.intro', function () {
+             if (isLineConnected()) {
+               continueTo(continueLine);
+             }
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-line') {
+               return;
+             } else if (mode.id === 'select') {
+               continueTo(retryIntersect);
+               return;
+             } else {
+               return chapter.restart();
+             }
+           });

 
 

-               var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
-               if (msec) { reveal(null, null, { duration: 0 }); }
-               context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-               timeout(function() {
-                   var padding = 250 * Math.pow(2, context.map().zoom() - 19);
-                   var box = pad(woodRoadDragMidpoint, padding, context);
-                   var advance = function() { continueTo(addNode); };
+         function isLineConnected() {
+           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);

 
 

-                   reveal(box, helpString('intro.lines.update_line'),
-                       { buttonText: _t('intro.ok'), buttonCallback: advance }
-                   );
+           if (!entity) return false;
+           var drawNodes = context.graph().childNodes(entity);
+           return drawNodes.some(function (node) {
+             return context.graph().parentWays(node).some(function (parent) {
+               return parent.id === flowerRoadID;
+             });
+           });
+         }

 
 

-                   context.map().on('move.intro drawn.intro', function() {
-                       var padding = 250 * Math.pow(2, context.map().zoom() - 19);
-                       var box = pad(woodRoadDragMidpoint, padding, context);
-                       reveal(box, helpString('intro.lines.update_line'),
-                           { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-                       );
-                   });
-               }, msec + 100);
+         function retryIntersect() {
+           select(window).on('pointerdown.intro mousedown.intro', eventCancel, true);
+           var box = pad(tulipRoadIntersection, 80, context);
+           reveal(box, helpHtml('intro.lines.retry_intersect', {
+             name: _t('intro.graph.name.flower-street')
+           }));
+           timeout(chapter.restart, 3000);
+         }

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   nextStep();
-               }
-           }
+         function continueLine() {
+           if (context.mode().id !== 'draw-line') return chapter.restart();

 
 

+           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);

 
 

-           function addNode() {
-               context.history().reset('doneAddLine');
-               if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-                   return chapter.restart();
-               }
+           if (!entity) return chapter.restart();
+           context.map().centerEase(tulipRoadIntersection, 500);
+           var continueLineText = helpHtml('intro.lines.continue_line') + '{br}' + helpHtml('intro.lines.finish_line_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.lines.finish_road');
+           reveal('.surface', continueLineText);
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-line') {
+               return;
+             } else if (mode.id === 'select') {
+               return continueTo(chooseCategoryRoad);
+             } else {
+               return chapter.restart();
+             }
+           });

 
 

-               var padding = 40 * Math.pow(2, context.map().zoom() - 19);
-               var box = pad(woodRoadAddNode, padding, context);
-               var addNodeString = helpString('intro.lines.add_node' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
-               reveal(box, addNodeString);
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   var padding = 40 * Math.pow(2, context.map().zoom() - 19);
-                   var box = pad(woodRoadAddNode, padding, context);
-                   reveal(box, addNodeString, { duration: 0 });
-               });
+         function chooseCategoryRoad() {
+           if (context.mode().id !== 'select') return chapter.restart();
+           context.on('exit.intro', function () {
+             return chapter.restart();
+           });
+           var button = context.container().select('.preset-category-road_minor .preset-list-button');
+           if (button.empty()) return chapter.restart(); // disallow scrolling
+
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             // reset pane, in case user somehow happened to change it..
+             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+             reveal(button.node(), helpHtml('intro.lines.choose_category_road', {
+               category: roadCategory.name()
+             }));
+             button.on('click.intro', function () {
+               continueTo(choosePresetResidential);
+             });
+           }, 400); // after editor pane visible

 
 

-               context.history().on('change.intro', function(changed) {
-                   if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-                       return continueTo(updateLine);
-                   }
-                   if (changed.created().length === 1) {
-                       timeout(function() { continueTo(startDragEndpoint); }, 500);
-                   }
-               });
+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.preset-list-button').on('click.intro', null);
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }

 
 

-               context.on('enter.intro', function(mode) {
-                   if (mode.id !== 'select') {
-                       continueTo(updateLine);
-                   }
-               });
+         function choosePresetResidential() {
+           if (context.mode().id !== 'select') return chapter.restart();
+           context.on('exit.intro', function () {
+             return chapter.restart();
+           });
+           var subgrid = context.container().select('.preset-category-road_minor .subgrid');
+           if (subgrid.empty()) return chapter.restart();
+           subgrid.selectAll(':not(.preset-highway-residential) .preset-list-button').on('click.intro', function () {
+             continueTo(retryPresetResidential);
+           });
+           subgrid.selectAll('.preset-highway-residential .preset-list-button').on('click.intro', function () {
+             continueTo(nameRoad);
+           });
+           timeout(function () {
+             reveal(subgrid.node(), helpHtml('intro.lines.choose_preset_residential', {
+               preset: residentialPreset.name()
+             }), {
+               tooltipBox: '.preset-highway-residential .preset-list-button',
+               duration: 300
+             });
+           }, 300);

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.history().on('change.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             context.container().select('.preset-list-button').on('click.intro', null);
+             context.on('exit.intro', null);
+             nextStep();

            }
            }

+         } // selected wrong road type

 
 
 
 

-           function startDragEndpoint() {
-               if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-                   return continueTo(updateLine);
-               }
-               var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-               var box = pad(woodRoadDragEndpoint, padding, context);
-               var startDragString = helpString('intro.lines.start_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch')) +
-                   helpString('intro.lines.drag_to_intersection');
-               reveal(box, startDragString);
-
-               context.map().on('move.intro drawn.intro', function() {
-                   if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-                       return continueTo(updateLine);
-                   }
-                   var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-                   var box = pad(woodRoadDragEndpoint, padding, context);
-                   reveal(box, startDragString, { duration: 0 });
+         function retryPresetResidential() {
+           if (context.mode().id !== 'select') return chapter.restart();
+           context.on('exit.intro', function () {
+             return chapter.restart();
+           }); // disallow scrolling

 
 

-                   var entity = context.entity(woodRoadEndID);
-                   if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
-                       continueTo(finishDragEndpoint);
-                   }
-               });
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             var button = context.container().select('.entity-editor-pane .preset-list-button');
+             reveal(button.node(), helpHtml('intro.lines.retry_preset_residential', {
+               preset: residentialPreset.name()
+             }));
+             button.on('click.intro', function () {
+               continueTo(chooseCategoryRoad);
+             });
+           }, 500);

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.preset-list-button').on('click.intro', null);
+             context.on('exit.intro', null);
+             nextStep();

            }
            }

+         }
+
+         function nameRoad() {
+           context.on('exit.intro', function () {
+             continueTo(didNameRoad);
+           });
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.lines.name_road', {
+               button: icon('#iD-icon-close', 'inline')
+             }), {
+               tooltipClass: 'intro-lines-name_road'
+             });
+           }, 500);

 
 

+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }

 
 

-           function finishDragEndpoint() {
-               if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-                   return continueTo(updateLine);
+         function didNameRoad() {
+           context.history().checkpoint('doneAddLine');
+           timeout(function () {
+             reveal('.surface', helpHtml('intro.lines.did_name_road'), {
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: function buttonCallback() {
+                 continueTo(updateLine);

                }
                }

+             });
+           }, 500);

 
 

-               var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-               var box = pad(woodRoadDragEndpoint, padding, context);
-               var finishDragString = helpString('intro.lines.spot_looks_good') +
-                   helpString('intro.lines.finish_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
-               reveal(box, finishDragString);
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-                       return continueTo(updateLine);
-                   }
-                   var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-                   var box = pad(woodRoadDragEndpoint, padding, context);
-                   reveal(box, finishDragString, { duration: 0 });
+         function updateLine() {
+           context.history().reset('doneAddLine');

 
 

-                   var entity = context.entity(woodRoadEndID);
-                   if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
-                       continueTo(startDragEndpoint);
-                   }
-               });
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return chapter.restart();
+           }

 
 

-               context.on('enter.intro', function() {
-                   continueTo(startDragMidpoint);
-               });
+           var msec = transitionTime(woodRoadDragMidpoint, context.map().center());

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });

            }
 
            }
 

+           context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
+           timeout(function () {
+             var padding = 250 * Math.pow(2, context.map().zoom() - 19);
+             var box = pad(woodRoadDragMidpoint, padding, context);

 
 

-           function startDragMidpoint() {
-               if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-                   return continueTo(updateLine);
-               }
-               if (context.selectedIDs().indexOf(woodRoadID) === -1) {
-                   context.enter(modeSelect(context, [woodRoadID]));
-               }
+             var advance = function advance() {
+               continueTo(addNode);
+             };

 
 

-               var padding = 80 * Math.pow(2, context.map().zoom() - 19);
+             reveal(box, helpHtml('intro.lines.update_line'), {
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: advance
+             });
+             context.map().on('move.intro drawn.intro', function () {
+               var padding = 250 * Math.pow(2, context.map().zoom() - 19);

                var box = pad(woodRoadDragMidpoint, padding, context);
                var box = pad(woodRoadDragMidpoint, padding, context);

-               reveal(box, helpString('intro.lines.start_drag_midpoint'));
-
-               context.map().on('move.intro drawn.intro', function() {
-                   if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-                       return continueTo(updateLine);
-                   }
-                   var padding = 80 * Math.pow(2, context.map().zoom() - 19);
-                   var box = pad(woodRoadDragMidpoint, padding, context);
-                   reveal(box, helpString('intro.lines.start_drag_midpoint'), { duration: 0 });
+               reveal(box, helpHtml('intro.lines.update_line'), {
+                 duration: 0,
+                 buttonText: _t.html('intro.ok'),
+                 buttonCallback: advance

                });
                });

+             });
+           }, msec + 100);

 
 

-               context.history().on('change.intro', function(changed) {
-                   if (changed.created().length === 1) {
-                       continueTo(continueDragMidpoint);
-                   }
-               });
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
+         }

 
 

-               context.on('enter.intro', function(mode) {
-                   if (mode.id !== 'select') {
-                       // keep Wood Road selected so midpoint triangles are drawn..
-                       context.enter(modeSelect(context, [woodRoadID]));
-                   }
-               });
+         function addNode() {
+           context.history().reset('doneAddLine');

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.history().on('change.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return chapter.restart();

            }
 
            }
 

+           var padding = 40 * Math.pow(2, context.map().zoom() - 19);
+           var box = pad(woodRoadAddNode, padding, context);
+           var addNodeString = helpHtml('intro.lines.add_node' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
+           reveal(box, addNodeString);
+           context.map().on('move.intro drawn.intro', function () {
+             var padding = 40 * Math.pow(2, context.map().zoom() - 19);
+             var box = pad(woodRoadAddNode, padding, context);
+             reveal(box, addNodeString, {
+               duration: 0
+             });
+           });
+           context.history().on('change.intro', function (changed) {
+             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+               return continueTo(updateLine);
+             }

 
 

-           function continueDragMidpoint() {
-               if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-                   return continueTo(updateLine);
-               }
+             if (changed.created().length === 1) {
+               timeout(function () {
+                 continueTo(startDragEndpoint);
+               }, 500);
+             }
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'select') {
+               continueTo(updateLine);
+             }
+           });

 
 

-               var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-               var box = pad(woodRoadDragEndpoint, padding, context);
-               box.height += 400;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-               var advance = function() {
-                   context.history().checkpoint('doneUpdateLine');
-                   continueTo(deleteLines);
-               };
+         function startDragEndpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }

 
 

-               reveal(box, helpString('intro.lines.continue_drag_midpoint'),
-                   { buttonText: _t('intro.ok'), buttonCallback: advance }
-               );
+           var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+           var box = pad(woodRoadDragEndpoint, padding, context);
+           var startDragString = helpHtml('intro.lines.start_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch')) + helpHtml('intro.lines.drag_to_intersection');
+           reveal(box, startDragString);
+           context.map().on('move.intro drawn.intro', function () {
+             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+               return continueTo(updateLine);
+             }

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-                       return continueTo(updateLine);
-                   }
-                   var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-                   var box = pad(woodRoadDragEndpoint, padding, context);
-                   box.height += 400;
-                   reveal(box, helpString('intro.lines.continue_drag_midpoint'),
-                       { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-                   );
-               });
+             var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+             var box = pad(woodRoadDragEndpoint, padding, context);
+             reveal(box, startDragString, {
+               duration: 0
+             });
+             var entity = context.entity(woodRoadEndID);

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   nextStep();
-               }
+             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
+               continueTo(finishDragEndpoint);
+             }
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function finishDragEndpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }

 
 

-           function deleteLines() {
-               context.history().reset('doneUpdateLine');
-               context.enter(modeBrowse(context));
+           var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+           var box = pad(woodRoadDragEndpoint, padding, context);
+           var finishDragString = helpHtml('intro.lines.spot_looks_good') + helpHtml('intro.lines.finish_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
+           reveal(box, finishDragString);
+           context.map().on('move.intro drawn.intro', function () {
+             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+               return continueTo(updateLine);
+             }

 
 

-               if (!context.hasEntity(washingtonStreetID) ||
-                   !context.hasEntity(twelfthAvenueID) ||
-                   !context.hasEntity(eleventhAvenueEndID)) {
-                   return chapter.restart();
-               }
-
-               var msec = transitionTime(deleteLinesLoc, context.map().center());
-               if (msec) { reveal(null, null, { duration: 0 }); }
-               context.map().centerZoomEase(deleteLinesLoc, 18, msec);
-
-               timeout(function() {
-                   var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-                   var box = pad(deleteLinesLoc, padding, context);
-                   box.top -= 200;
-                   box.height += 400;
-                   var advance = function() { continueTo(rightClickIntersection); };
-
-                   reveal(box, helpString('intro.lines.delete_lines', { street: _t('intro.graph.name.12th-avenue') }),
-                       { buttonText: _t('intro.ok'), buttonCallback: advance }
-                   );
-
-                   context.map().on('move.intro drawn.intro', function() {
-                       var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-                       var box = pad(deleteLinesLoc, padding, context);
-                       box.top -= 200;
-                       box.height += 400;
-                       reveal(box, helpString('intro.lines.delete_lines', { street: _t('intro.graph.name.12th-avenue') }),
-                           { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-                       );
-                   });
+             var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+             var box = pad(woodRoadDragEndpoint, padding, context);
+             reveal(box, finishDragString, {
+               duration: 0
+             });
+             var entity = context.entity(woodRoadEndID);

 
 

-                   context.history().on('change.intro', function() {
-                       timeout(function() {
-                           continueTo(deleteLines);
-                       }, 500);  // after any transition (e.g. if user deleted intersection)
-                   });
+             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
+               continueTo(startDragEndpoint);
+             }
+           });
+           context.on('enter.intro', function () {
+             continueTo(startDragMidpoint);
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-               }, msec + 100);
+         function startDragMidpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
+           if (context.selectedIDs().indexOf(woodRoadID) === -1) {
+             context.enter(modeSelect(context, [woodRoadID]));

            }
 
            }
 

+           var padding = 80 * Math.pow(2, context.map().zoom() - 19);
+           var box = pad(woodRoadDragMidpoint, padding, context);
+           reveal(box, helpHtml('intro.lines.start_drag_midpoint'));
+           context.map().on('move.intro drawn.intro', function () {
+             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+               return continueTo(updateLine);
+             }

 
 

-           function rightClickIntersection() {
-               context.history().reset('doneUpdateLine');
-               context.enter(modeBrowse(context));
+             var padding = 80 * Math.pow(2, context.map().zoom() - 19);
+             var box = pad(woodRoadDragMidpoint, padding, context);
+             reveal(box, helpHtml('intro.lines.start_drag_midpoint'), {
+               duration: 0
+             });
+           });
+           context.history().on('change.intro', function (changed) {
+             if (changed.created().length === 1) {
+               continueTo(continueDragMidpoint);
+             }
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'select') {
+               // keep Wood Road selected so midpoint triangles are drawn..
+               context.enter(modeSelect(context, [woodRoadID]));
+             }
+           });

 
 

-               context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-               var rightClickString = helpString('intro.lines.split_street', {
-                       street1: _t('intro.graph.name.11th-avenue'),
-                       street2: _t('intro.graph.name.washington-street')
-                   }) +
-                   helpString('intro.lines.' + (context.lastPointerType() === 'mouse' ? 'rightclick_intersection' : 'edit_menu_intersection_touch'));
+         function continueDragMidpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }

 
 

-               timeout(function() {
-                   var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-                   var box = pad(eleventhAvenueEnd, padding, context);
-                   reveal(box, rightClickString);
+           var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+           var box = pad(woodRoadDragEndpoint, padding, context);
+           box.height += 400;

 
 

-                   context.map().on('move.intro drawn.intro', function() {
-                       var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-                       var box = pad(eleventhAvenueEnd, padding, context);
-                       reveal(box, rightClickString,
-                           { duration: 0 }
-                       );
-                   });
+           var advance = function advance() {
+             context.history().checkpoint('doneUpdateLine');
+             continueTo(deleteLines);
+           };

 
 

-                   context.on('enter.intro', function(mode) {
-                       if (mode.id !== 'select') { return; }
-                       var ids = context.selectedIDs();
-                       if (ids.length !== 1 || ids[0] !== eleventhAvenueEndID) { return; }
+           reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: advance
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+               return continueTo(updateLine);
+             }

 
 

-                       timeout(function() {
-                           var node = selectMenuItem(context, 'split').node();
-                           if (!node) { return; }
-                           continueTo(splitIntersection);
-                       }, 50);  // after menu visible
-                   });
+             var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+             var box = pad(woodRoadDragEndpoint, padding, context);
+             box.height += 400;
+             reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: advance
+             });
+           });

 
 

-                   context.history().on('change.intro', function() {
-                       timeout(function() {
-                           continueTo(deleteLines);
-                       }, 300);  // after any transition (e.g. if user deleted intersection)
-                   });
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
+         }

 
 

-               }, 600);
+         function deleteLines() {
+           context.history().reset('doneUpdateLine');
+           context.enter(modeBrowse(context));

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
+           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return chapter.restart();

            }
 
            }
 

+           var msec = transitionTime(deleteLinesLoc, context.map().center());

 
 

-           function splitIntersection() {
-               if (!context.hasEntity(washingtonStreetID) ||
-                   !context.hasEntity(twelfthAvenueID) ||
-                   !context.hasEntity(eleventhAvenueEndID)) {
-                   return continueTo(deleteLines);
-               }
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }

 
 

-               var node = selectMenuItem(context, 'split').node();
-               if (!node) { return continueTo(rightClickIntersection); }
+           context.map().centerZoomEase(deleteLinesLoc, 18, msec);
+           timeout(function () {
+             var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+             var box = pad(deleteLinesLoc, padding, context);
+             box.top -= 200;
+             box.height += 400;

 
 

-               var wasChanged = false;
-               _washingtonSegmentID = null;
+             var advance = function advance() {
+               continueTo(rightClickIntersection);
+             };

 
 

-               reveal('.edit-menu', helpString('intro.lines.split_intersection',
-                   { street: _t('intro.graph.name.washington-street') }),
-                   { padding: 50 }
-               );
+             reveal(box, helpHtml('intro.lines.delete_lines', {
+               street: _t('intro.graph.name.12th-avenue')
+             }), {
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: advance
+             });
+             context.map().on('move.intro drawn.intro', function () {
+               var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+               var box = pad(deleteLinesLoc, padding, context);
+               box.top -= 200;
+               box.height += 400;
+               reveal(box, helpHtml('intro.lines.delete_lines', {
+                 street: _t('intro.graph.name.12th-avenue')
+               }), {
+                 duration: 0,
+                 buttonText: _t.html('intro.ok'),
+                 buttonCallback: advance
+               });
+             });
+             context.history().on('change.intro', function () {
+               timeout(function () {
+                 continueTo(deleteLines);
+               }, 500); // after any transition (e.g. if user deleted intersection)
+             });
+           }, msec + 100);

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   var node = selectMenuItem(context, 'split').node();
-                   if (!wasChanged && !node) { return continueTo(rightClickIntersection); }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }

 
 

-                   reveal('.edit-menu', helpString('intro.lines.split_intersection',
-                       { street: _t('intro.graph.name.washington-street') }),
-                       { duration: 0, padding: 50 }
-                   );
+         function rightClickIntersection() {
+           context.history().reset('doneUpdateLine');
+           context.enter(modeBrowse(context));
+           context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
+           var rightClickString = helpHtml('intro.lines.split_street', {
+             street1: _t('intro.graph.name.11th-avenue'),
+             street2: _t('intro.graph.name.washington-street')
+           }) + helpHtml('intro.lines.' + (context.lastPointerType() === 'mouse' ? 'rightclick_intersection' : 'edit_menu_intersection_touch'));
+           timeout(function () {
+             var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+             var box = pad(eleventhAvenueEnd, padding, context);
+             reveal(box, rightClickString);
+             context.map().on('move.intro drawn.intro', function () {
+               var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+               var box = pad(eleventhAvenueEnd, padding, context);
+               reveal(box, rightClickString, {
+                 duration: 0

                });
                });

+             });
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'select') return;
+               var ids = context.selectedIDs();
+               if (ids.length !== 1 || ids[0] !== eleventhAvenueEndID) return;
+               timeout(function () {
+                 var node = selectMenuItem(context, 'split').node();
+                 if (!node) return;
+                 continueTo(splitIntersection);
+               }, 50); // after menu visible
+             });
+             context.history().on('change.intro', function () {
+               timeout(function () {
+                 continueTo(deleteLines);
+               }, 300); // after any transition (e.g. if user deleted intersection)
+             });
+           }, 600);

 
 

-               context.history().on('change.intro', function(changed) {
-                   wasChanged = true;
-                   timeout(function() {
-                       if (context.history().undoAnnotation() === _t('operations.split.annotation.line')) {
-                           _washingtonSegmentID = changed.created()[0].id;
-                           continueTo(didSplit);
-                       } else {
-                           _washingtonSegmentID = null;
-                           continueTo(retrySplit);
-                       }
-                   }, 300);  // after any transition (e.g. if user deleted intersection)
-               });
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
+         function splitIntersection() {
+           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(deleteLines);

            }
 
            }
 

+           var node = selectMenuItem(context, 'split').node();

 
 

-           function retrySplit() {
-               context.enter(modeBrowse(context));
-               context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
-               var advance = function() { continueTo(rightClickIntersection); };
+           if (!node) {
+             return continueTo(rightClickIntersection);
+           }

 
 

-               var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-               var box = pad(eleventhAvenueEnd, padding, context);
-               reveal(box, helpString('intro.lines.retry_split'),
-                   { buttonText: _t('intro.ok'), buttonCallback: advance }
-               );
+           var wasChanged = false;
+           _washingtonSegmentID = null;
+           reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
+             street: _t('intro.graph.name.washington-street')
+           }), {
+             padding: 50
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             var node = selectMenuItem(context, 'split').node();

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-                   var box = pad(eleventhAvenueEnd, padding, context);
-                   reveal(box, helpString('intro.lines.retry_split'),
-                       { duration: 0, buttonText: _t('intro.ok'), buttonCallback: advance }
-                   );
-               });
+             if (!wasChanged && !node) {
+               return continueTo(rightClickIntersection);
+             }

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   nextStep();
+             reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
+               street: _t('intro.graph.name.washington-street')
+             }), {
+               duration: 0,
+               padding: 50
+             });
+           });
+           context.history().on('change.intro', function (changed) {
+             wasChanged = true;
+             timeout(function () {
+               if (context.history().undoAnnotation() === _t('operations.split.annotation.line', {
+                 n: 1
+               })) {
+                 _washingtonSegmentID = changed.created()[0].id;
+                 continueTo(didSplit);
+               } else {
+                 _washingtonSegmentID = null;
+                 continueTo(retrySplit);

                }
                }

+             }, 300); // after any transition (e.g. if user deleted intersection)
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function retrySplit() {
+           context.enter(modeBrowse(context));
+           context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);

 
 

-           function didSplit() {
-               if (!_washingtonSegmentID ||
-                   !context.hasEntity(_washingtonSegmentID) ||
-                   !context.hasEntity(washingtonStreetID) ||
-                   !context.hasEntity(twelfthAvenueID) ||
-                   !context.hasEntity(eleventhAvenueEndID)) {
-                   return continueTo(rightClickIntersection);
-               }
+           var advance = function advance() {
+             continueTo(rightClickIntersection);
+           };

 
 

-               var ids = context.selectedIDs();
-               var string = 'intro.lines.did_split_' + (ids.length > 1 ? 'multi' : 'single');
-               var street = _t('intro.graph.name.washington-street');
+           var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+           var box = pad(eleventhAvenueEnd, padding, context);
+           reveal(box, helpHtml('intro.lines.retry_split'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: advance
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+             var box = pad(eleventhAvenueEnd, padding, context);
+             reveal(box, helpHtml('intro.lines.retry_split'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: advance
+             });
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
+         }
+
+         function didSplit() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
+           }

 
 

+           var ids = context.selectedIDs();
+           var string = 'intro.lines.did_split_' + (ids.length > 1 ? 'multi' : 'single');
+           var street = _t('intro.graph.name.washington-street');
+           var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+           var box = pad(twelfthAvenue, padding, context);
+           box.width = box.width / 2;
+           reveal(box, helpHtml(string, {
+             street1: street,
+             street2: street
+           }), {
+             duration: 500
+           });
+           timeout(function () {
+             context.map().centerZoomEase(twelfthAvenue, 18, 500);
+             context.map().on('move.intro drawn.intro', function () {

                var padding = 200 * Math.pow(2, context.map().zoom() - 18);
                var box = pad(twelfthAvenue, padding, context);
                box.width = box.width / 2;
                var padding = 200 * Math.pow(2, context.map().zoom() - 18);
                var box = pad(twelfthAvenue, padding, context);
                box.width = box.width / 2;

-               reveal(box, helpString(string, { street1: street, street2: street }),
-                   { duration: 500 }
-               );
+               reveal(box, helpHtml(string, {
+                 street1: street,
+                 street2: street
+               }), {
+                 duration: 0
+               });
+             });
+           }, 600); // after initial reveal and curtain cut

 
 

-               timeout(function() {
-                   context.map().centerZoomEase(twelfthAvenue, 18, 500);
+           context.on('enter.intro', function () {
+             var ids = context.selectedIDs();

 
 

-                   context.map().on('move.intro drawn.intro', function() {
-                       var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-                       var box = pad(twelfthAvenue, padding, context);
-                       box.width = box.width / 2;
-                       reveal(box, helpString(string, { street1: street, street2: street }),
-                           { duration: 0 }
-                       );
-                   });
-               }, 600);  // after initial reveal and curtain cut
+             if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
+               continueTo(multiSelect);
+             }
+           });
+           context.history().on('change.intro', function () {
+             if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+               return continueTo(rightClickIntersection);
+             }
+           });

 
 

-               context.on('enter.intro', function() {
-                   var ids = context.selectedIDs();
-                   if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
-                       continueTo(multiSelect);
-                   }
-               });
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }

 
 

-               context.history().on('change.intro', function() {
-                   if (!_washingtonSegmentID ||
-                       !context.hasEntity(_washingtonSegmentID) ||
-                       !context.hasEntity(washingtonStreetID) ||
-                       !context.hasEntity(twelfthAvenueID) ||
-                       !context.hasEntity(eleventhAvenueEndID)) {
-                       return continueTo(rightClickIntersection);
-                   }
-               });
+         function multiSelect() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
+           }

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
+           var ids = context.selectedIDs();
+           var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
+           var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
+
+           if (hasWashington && hasTwelfth) {
+             return continueTo(multiRightClick);
+           } else if (!hasWashington && !hasTwelfth) {
+             return continueTo(didSplit);

            }
 
            }
 

+           context.map().centerZoomEase(twelfthAvenue, 18, 500);
+           timeout(function () {
+             var selected, other, padding, box;
+
+             if (hasWashington) {
+               selected = _t('intro.graph.name.washington-street');
+               other = _t('intro.graph.name.12th-avenue');
+               padding = 60 * Math.pow(2, context.map().zoom() - 18);
+               box = pad(twelfthAvenueEnd, padding, context);
+               box.width *= 3;
+             } else {
+               selected = _t('intro.graph.name.12th-avenue');
+               other = _t('intro.graph.name.washington-street');
+               padding = 200 * Math.pow(2, context.map().zoom() - 18);
+               box = pad(twelfthAvenue, padding, context);
+               box.width /= 2;
+             }

 
 

-           function multiSelect() {
-               if (!_washingtonSegmentID ||
-                   !context.hasEntity(_washingtonSegmentID) ||
-                   !context.hasEntity(washingtonStreetID) ||
-                   !context.hasEntity(twelfthAvenueID) ||
-                   !context.hasEntity(eleventhAvenueEndID)) {
-                   return continueTo(rightClickIntersection);
+             reveal(box, helpHtml('intro.lines.multi_select', {
+               selected: selected,
+               other1: other
+             }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
+               selected: selected,
+               other2: other
+             }));
+             context.map().on('move.intro drawn.intro', function () {
+               if (hasWashington) {
+                 selected = _t('intro.graph.name.washington-street');
+                 other = _t('intro.graph.name.12th-avenue');
+                 padding = 60 * Math.pow(2, context.map().zoom() - 18);
+                 box = pad(twelfthAvenueEnd, padding, context);
+                 box.width *= 3;
+               } else {
+                 selected = _t('intro.graph.name.12th-avenue');
+                 other = _t('intro.graph.name.washington-street');
+                 padding = 200 * Math.pow(2, context.map().zoom() - 18);
+                 box = pad(twelfthAvenue, padding, context);
+                 box.width /= 2;
+               }
+
+               reveal(box, helpHtml('intro.lines.multi_select', {
+                 selected: selected,
+                 other1: other
+               }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
+                 selected: selected,
+                 other2: other
+               }), {
+                 duration: 0
+               });
+             });
+             context.on('enter.intro', function () {
+               continueTo(multiSelect);
+             });
+             context.history().on('change.intro', function () {
+               if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+                 return continueTo(rightClickIntersection);

                }
                }

+             });
+           }, 600);
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
+
+         function multiRightClick() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
+           }

 
 

+           var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+           var box = pad(twelfthAvenue, padding, context);
+           var rightClickString = helpHtml('intro.lines.multi_select_success') + helpHtml('intro.lines.multi_' + (context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch'));
+           reveal(box, rightClickString);
+           context.map().on('move.intro drawn.intro', function () {
+             var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+             var box = pad(twelfthAvenue, padding, context);
+             reveal(box, rightClickString, {
+               duration: 0
+             });
+           });
+           context.ui().editMenu().on('toggled.intro', function (open) {
+             if (!open) return;
+             timeout(function () {

                var ids = context.selectedIDs();
                var ids = context.selectedIDs();

-               var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
-               var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;

 
 

-               if (hasWashington && hasTwelfth) {
-                   return continueTo(multiRightClick);
-               } else if (!hasWashington && !hasTwelfth) {
-                   return continueTo(didSplit);
+               if (ids.length === 2 && ids.indexOf(twelfthAvenueID) !== -1 && ids.indexOf(_washingtonSegmentID) !== -1) {
+                 var node = selectMenuItem(context, 'delete').node();
+                 if (!node) return;
+                 continueTo(multiDelete);
+               } else if (ids.length === 1 && ids.indexOf(_washingtonSegmentID) !== -1) {
+                 return continueTo(multiSelect);
+               } else {
+                 return continueTo(didSplit);

                }
                }

+             }, 300); // after edit menu visible
+           });
+           context.history().on('change.intro', function () {
+             if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+               return continueTo(rightClickIntersection);
+             }
+           });

 
 

-               context.map().centerZoomEase(twelfthAvenue, 18, 500);
-
-               timeout(function() {
-                   var selected, other, padding, box;
-                   if (hasWashington) {
-                       selected = _t('intro.graph.name.washington-street');
-                       other = _t('intro.graph.name.12th-avenue');
-                       padding = 60 * Math.pow(2, context.map().zoom() - 18);
-                       box = pad(twelfthAvenueEnd, padding, context);
-                       box.width *= 3;
-                   } else {
-                       selected = _t('intro.graph.name.12th-avenue');
-                       other = _t('intro.graph.name.washington-street');
-                       padding = 200 * Math.pow(2, context.map().zoom() - 18);
-                       box = pad(twelfthAvenue, padding, context);
-                       box.width /= 2;
-                   }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.ui().editMenu().on('toggled.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }

 
 

-                   reveal(box,
-                       helpString('intro.lines.multi_select',
-                           { selected: selected, other1: other }) + ' ' +
-                       helpString('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'),
-                           { selected: selected, other2: other })
-                   );
-
-                   context.map().on('move.intro drawn.intro', function() {
-                       if (hasWashington) {
-                           selected = _t('intro.graph.name.washington-street');
-                           other = _t('intro.graph.name.12th-avenue');
-                           padding = 60 * Math.pow(2, context.map().zoom() - 18);
-                           box = pad(twelfthAvenueEnd, padding, context);
-                           box.width *= 3;
-                       } else {
-                           selected = _t('intro.graph.name.12th-avenue');
-                           other = _t('intro.graph.name.washington-street');
-                           padding = 200 * Math.pow(2, context.map().zoom() - 18);
-                           box = pad(twelfthAvenue, padding, context);
-                           box.width /= 2;
-                       }
+         function multiDelete() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
+           }

 
 

-                       reveal(box,
-                           helpString('intro.lines.multi_select',
-                               { selected: selected, other1: other }) + ' ' +
-                           helpString('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'),
-                               { selected: selected, other2: other }),
-                           { duration: 0 }
-                       );
-                   });
+           var node = selectMenuItem(context, 'delete').node();
+           if (!node) return continueTo(multiRightClick);
+           reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
+             padding: 50
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
+               duration: 0,
+               padding: 50
+             });
+           });
+           context.on('exit.intro', function () {
+             if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
+               return continueTo(multiSelect); // left select mode but roads still exist
+             }
+           });
+           context.history().on('change.intro', function () {
+             if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
+               continueTo(retryDelete); // changed something but roads still exist
+             } else {
+               continueTo(play);
+             }
+           });

 
 

-                   context.on('enter.intro', function() {
-                       continueTo(multiSelect);
-                   });
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }

 
 

-                   context.history().on('change.intro', function() {
-                       if (!_washingtonSegmentID ||
-                           !context.hasEntity(_washingtonSegmentID) ||
-                           !context.hasEntity(washingtonStreetID) ||
-                           !context.hasEntity(twelfthAvenueID) ||
-                           !context.hasEntity(eleventhAvenueEndID)) {
-                           return continueTo(rightClickIntersection);
-                       }
-                   });
-               }, 600);
+         function retryDelete() {
+           context.enter(modeBrowse(context));
+           var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+           var box = pad(twelfthAvenue, padding, context);
+           reveal(box, helpHtml('intro.lines.retry_delete'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(multiSelect);
+             }
+           });

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             nextStep();

            }
            }

+         }

 
 

+         function play() {
+           dispatch.call('done');
+           reveal('.ideditor', helpHtml('intro.lines.play', {
+             next: _t('intro.buildings.title')
+           }), {
+             tooltipBox: '.intro-nav-wrap .chapter-building',
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               reveal('.ideditor');
+             }
+           });
+         }

 
 

-           function multiRightClick() {
-               if (!_washingtonSegmentID ||
-                   !context.hasEntity(_washingtonSegmentID) ||
-                   !context.hasEntity(washingtonStreetID) ||
-                   !context.hasEntity(twelfthAvenueID) ||
-                   !context.hasEntity(eleventhAvenueEndID)) {
-                   return continueTo(rightClickIntersection);
-               }
+         chapter.enter = function () {
+           addLine();
+         };

 
 

-               var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-               var box = pad(twelfthAvenue, padding, context);
+         chapter.exit = function () {
+           timeouts.forEach(window.clearTimeout);
+           select(window).on('pointerdown.intro mousedown.intro', null, true);
+           context.on('enter.intro exit.intro', null);
+           context.map().on('move.intro drawn.intro', null);
+           context.history().on('change.intro', null);
+           context.container().select('.inspector-wrap').on('wheel.intro', null);
+           context.container().select('.preset-list-button').on('click.intro', null);
+         };

 
 

-               var rightClickString = helpString('intro.lines.multi_select_success') +
-                   helpString('intro.lines.multi_' + (context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch'));
-               reveal(box, rightClickString);
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-                   var box = pad(twelfthAvenue, padding, context);
-                   reveal(box, rightClickString, { duration: 0 });
-               });
+         return utilRebind(chapter, dispatch, 'on');
+       }

 
 

-               context.ui().editMenu().on('toggled.intro', function(open) {
-                   if (!open) { return; }
-
-                   timeout(function() {
-                       var ids = context.selectedIDs();
-                       if (ids.length === 2 &&
-                           ids.indexOf(twelfthAvenueID) !== -1 &&
-                           ids.indexOf(_washingtonSegmentID) !== -1) {
-                               var node = selectMenuItem(context, 'delete').node();
-                               if (!node) { return; }
-                               continueTo(multiDelete);
-                       } else if (ids.length === 1 &&
-                           ids.indexOf(_washingtonSegmentID) !== -1) {
-                           return continueTo(multiSelect);
-                       } else {
-                           return continueTo(didSplit);
-                       }
-                   }, 300);  // after edit menu visible
-               });
+       function uiIntroBuilding(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var house = [-85.62815, 41.95638];
+         var tank = [-85.62732, 41.95347];
+         var buildingCatetory = _mainPresetIndex.item('category-building');
+         var housePreset = _mainPresetIndex.item('building/house');
+         var tankPreset = _mainPresetIndex.item('man_made/storage_tank');
+         var timeouts = [];
+         var _houseID = null;
+         var _tankID = null;
+         var chapter = {
+           title: 'intro.buildings.title'
+         };

 
 

-               context.history().on('change.intro', function() {
-                   if (!_washingtonSegmentID ||
-                       !context.hasEntity(_washingtonSegmentID) ||
-                       !context.hasEntity(washingtonStreetID) ||
-                       !context.hasEntity(twelfthAvenueID) ||
-                       !context.hasEntity(eleventhAvenueEndID)) {
-                       return continueTo(rightClickIntersection);
-                   }
-               });
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.ui().editMenu().on('toggled.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
-           }
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }

 
 

+         function revealHouse(center, text, options) {
+           var padding = 160 * Math.pow(2, context.map().zoom() - 20);
+           var box = pad(center, padding, context);
+           reveal(box, text, options);
+         }

 
 

-           function multiDelete() {
-               if (!_washingtonSegmentID ||
-                   !context.hasEntity(_washingtonSegmentID) ||
-                   !context.hasEntity(washingtonStreetID) ||
-                   !context.hasEntity(twelfthAvenueID) ||
-                   !context.hasEntity(eleventhAvenueEndID)) {
-                   return continueTo(rightClickIntersection);
-               }
+         function revealTank(center, text, options) {
+           var padding = 190 * Math.pow(2, context.map().zoom() - 19.5);
+           var box = pad(center, padding, context);
+           reveal(box, text, options);
+         }

 
 

-               var node = selectMenuItem(context, 'delete').node();
-               if (!node) { return continueTo(multiRightClick); }
+         function addHouse() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           _houseID = null;
+           var msec = transitionTime(house, context.map().center());

 
 

-               reveal('.edit-menu',
-                   helpString('intro.lines.multi_delete'),
-                   { padding: 50 }
-               );
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   reveal('.edit-menu',
-                       helpString('intro.lines.multi_delete'),
-                       { duration: 0, padding: 50 }
-                   );
-               });
+           context.map().centerZoomEase(house, 19, msec);
+           timeout(function () {
+             var tooltip = reveal('button.add-area', helpHtml('intro.buildings.add_building'));
+             tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-buildings');
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'add-area') return;
+               continueTo(startHouse);
+             });
+           }, msec + 100);

 
 

-               context.on('exit.intro', function() {
-                   if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-                       return continueTo(multiSelect);  // left select mode but roads still exist
-                   }
-               });
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-               context.history().on('change.intro', function() {
-                   if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-                       continueTo(retryDelete);         // changed something but roads still exist
-                   } else {
-                       continueTo(play);
-                   }
+         function startHouse() {
+           if (context.mode().id !== 'add-area') {
+             return continueTo(addHouse);
+           }
+
+           _houseID = null;
+           context.map().zoomEase(20, 500);
+           timeout(function () {
+             var startString = helpHtml('intro.buildings.start_building') + helpHtml('intro.buildings.building_corner_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
+             revealHouse(house, startString);
+             context.map().on('move.intro drawn.intro', function () {
+               revealHouse(house, startString, {
+                 duration: 0

                });
                });

+             });
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'draw-area') return chapter.restart();
+               continueTo(continueHouse);
+             });
+           }, 550); // after easing

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('exit.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function continueHouse() {
+           if (context.mode().id !== 'draw-area') {
+             return continueTo(addHouse);
+           }

 
 

-           function retryDelete() {
-               context.enter(modeBrowse(context));
-
-               var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-               var box = pad(twelfthAvenue, padding, context);
-               reveal(box, helpString('intro.lines.retry_delete'), {
-                   buttonText: _t('intro.ok'),
-                   buttonCallback: function() { continueTo(multiSelect); }
+           _houseID = null;
+           var continueString = helpHtml('intro.buildings.continue_building') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_building');
+           revealHouse(house, continueString);
+           context.map().on('move.intro drawn.intro', function () {
+             revealHouse(house, continueString, {
+               duration: 0
+             });
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-area') {
+               return;
+             } else if (mode.id === 'select') {
+               var graph = context.graph();
+               var way = context.entity(context.selectedIDs()[0]);
+               var nodes = graph.childNodes(way);
+               var points = utilArrayUniq(nodes).map(function (n) {
+                 return context.projection(n.loc);

                });
 
                });
 

-               function continueTo(nextStep) {
-                   nextStep();
+               if (isMostlySquare(points)) {
+                 _houseID = way.id;
+                 return continueTo(chooseCategoryBuilding);
+               } else {
+                 return continueTo(retryHouse);

                }
                }

+             } else {
+               return chapter.restart();
+             }
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function retryHouse() {
+           var onClick = function onClick() {
+             continueTo(addHouse);
+           };

 
 

-           function play() {
-               dispatch$1.call('done');
-               reveal('.ideditor',
-                   helpString('intro.lines.play', { next: _t('intro.buildings.title') }), {
-                       tooltipBox: '.intro-nav-wrap .chapter-building',
-                       buttonText: _t('intro.ok'),
-                       buttonCallback: function() { reveal('.ideditor'); }
-                   }
-               );
-          }
+           revealHouse(house, helpHtml('intro.buildings.retry_building'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             revealHouse(house, helpHtml('intro.buildings.retry_building'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: onClick
+             });
+           });

 
 

+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
+         }

 
 

-           chapter.enter = function() {
-               addLine();
-           };
+         function chooseCategoryBuilding() {
+           if (!_houseID || !context.hasEntity(_houseID)) {
+             return addHouse();
+           }

 
 

+           var ids = context.selectedIDs();

 
 

-           chapter.exit = function() {
-               timeouts.forEach(window.clearTimeout);
-               select(window).on('pointerdown.intro mousedown.intro', null, true);
-               context.on('enter.intro exit.intro', null);
-               context.map().on('move.intro drawn.intro', null);
-               context.history().on('change.intro', null);
-               context.container().select('.inspector-wrap').on('wheel.intro', null);
-               context.container().select('.preset-list-button').on('click.intro', null);
-           };
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+             context.enter(modeSelect(context, [_houseID]));
+           } // disallow scrolling

 
 
 
 

-           chapter.restart = function() {
-               chapter.exit();
-               chapter.enter();
-           };
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             // reset pane, in case user somehow happened to change it..
+             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+             var button = context.container().select('.preset-category-building .preset-list-button');
+             reveal(button.node(), helpHtml('intro.buildings.choose_category_building', {
+               category: buildingCatetory.name()
+             }));
+             button.on('click.intro', function () {
+               button.on('click.intro', null);
+               continueTo(choosePresetHouse);
+             });
+           }, 400); // after preset list pane visible..

 
 

+           context.on('enter.intro', function (mode) {
+             if (!_houseID || !context.hasEntity(_houseID)) {
+               return continueTo(addHouse);
+             }

 
 

-           return utilRebind(chapter, dispatch$1, 'on');
-       }
+             var ids = context.selectedIDs();

 
 

-       function uiIntroBuilding(context, reveal) {
-           var dispatch$1 = dispatch('done');
-           var house = [-85.62815, 41.95638];
-           var tank = [-85.62732, 41.95347];
-           var buildingCatetory = _mainPresetIndex.item('category-building');
-           var housePreset = _mainPresetIndex.item('building/house');
-           var tankPreset = _mainPresetIndex.item('man_made/storage_tank');
-           var timeouts = [];
-           var _houseID = null;
-           var _tankID = null;
-
-
-           var chapter = {
-               title: 'intro.buildings.title'
-           };
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+               return continueTo(chooseCategoryBuilding);
+             }
+           });

 
 

+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.preset-list-button').on('click.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-           function timeout(f, t) {
-               timeouts.push(window.setTimeout(f, t));
+         function choosePresetHouse() {
+           if (!_houseID || !context.hasEntity(_houseID)) {
+             return addHouse();

            }
 
            }
 

+           var ids = context.selectedIDs();

 
 

-           function eventCancel() {
-               event.stopPropagation();
-               event.preventDefault();
-           }
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+             context.enter(modeSelect(context, [_houseID]));
+           } // disallow scrolling

 
 
 
 

-           function revealHouse(center, text, options) {
-               var padding = 160 * Math.pow(2, context.map().zoom() - 20);
-               var box = pad(center, padding, context);
-               reveal(box, text, options);
-           }
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             // reset pane, in case user somehow happened to change it..
+             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+             var button = context.container().select('.preset-building-house .preset-list-button');
+             reveal(button.node(), helpHtml('intro.buildings.choose_preset_house', {
+               preset: housePreset.name()
+             }), {
+               duration: 300
+             });
+             button.on('click.intro', function () {
+               button.on('click.intro', null);
+               continueTo(closeEditorHouse);
+             });
+           }, 400); // after preset list pane visible..

 
 

+           context.on('enter.intro', function (mode) {
+             if (!_houseID || !context.hasEntity(_houseID)) {
+               return continueTo(addHouse);
+             }
+
+             var ids = context.selectedIDs();
+
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+               return continueTo(chooseCategoryBuilding);
+             }
+           });

 
 

-           function revealTank(center, text, options) {
-               var padding = 190 * Math.pow(2, context.map().zoom() - 19.5);
-               var box = pad(center, padding, context);
-               reveal(box, text, options);
+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.preset-list-button').on('click.intro', null);
+             context.on('enter.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function closeEditorHouse() {
+           if (!_houseID || !context.hasEntity(_houseID)) {
+             return addHouse();
+           }

 
 

-           function addHouse() {
-               context.enter(modeBrowse(context));
-               context.history().reset('initial');
-               _houseID = null;
-
-               var msec = transitionTime(house, context.map().center());
-               if (msec) { reveal(null, null, { duration: 0 }); }
-               context.map().centerZoomEase(house, 19, msec);
-
-               timeout(function() {
-                   var tooltip = reveal('button.add-area',
-                       helpString('intro.buildings.add_building'));
-
-                   tooltip.selectAll('.popover-inner')
-                       .insert('svg', 'span')
-                       .attr('class', 'tooltip-illustration')
-                       .append('use')
-                       .attr('xlink:href', '#iD-graphic-buildings');
-
-                   context.on('enter.intro', function(mode) {
-                       if (mode.id !== 'add-area') { return; }
-                       continueTo(startHouse);
-                   });
-               }, msec + 100);
+           var ids = context.selectedIDs();

 
 

-               function continueTo(nextStep) {
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+             context.enter(modeSelect(context, [_houseID]));

            }
 
            }
 

+           context.history().checkpoint('hasHouse');
+           context.on('exit.intro', function () {
+             continueTo(rightClickHouse);
+           });
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
+               button: icon('#iD-icon-close', 'inline')
+             }));
+           }, 500);

 
 

-           function startHouse() {
-               if (context.mode().id !== 'add-area') {
-                   return continueTo(addHouse);
-               }
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }

 
 

-               _houseID = null;
-               context.map().zoomEase(20, 500);
+         function rightClickHouse() {
+           if (!_houseID) return chapter.restart();
+           context.enter(modeBrowse(context));
+           context.history().reset('hasHouse');
+           var zoom = context.map().zoom();

 
 

-               timeout(function() {
-                   var startString = helpString('intro.buildings.start_building') +
-                       helpString('intro.buildings.building_corner_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
-                   revealHouse(house, startString);
+           if (zoom < 20) {
+             zoom = 20;
+           }

 
 

-                   context.map().on('move.intro drawn.intro', function() {
-                       revealHouse(house, startString, { duration: 0 });
-                   });
+           context.map().centerZoomEase(house, zoom, 500);
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'select') return;
+             var ids = context.selectedIDs();
+             if (ids.length !== 1 || ids[0] !== _houseID) return;
+             timeout(function () {
+               var node = selectMenuItem(context, 'orthogonalize').node();
+               if (!node) return;
+               continueTo(clickSquare);
+             }, 50); // after menu visible
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_building' : 'edit_menu_building_touch'));
+             revealHouse(house, rightclickString, {
+               duration: 0
+             });
+           });
+           context.history().on('change.intro', function () {
+             continueTo(rightClickHouse);
+           });

 
 

-                   context.on('enter.intro', function(mode) {
-                       if (mode.id !== 'draw-area') { return chapter.restart(); }
-                       continueTo(continueHouse);
-                   });
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }

 
 

-               }, 550);  // after easing
+         function clickSquare() {
+           if (!_houseID) return chapter.restart();
+           var entity = context.hasEntity(_houseID);
+           if (!entity) return continueTo(rightClickHouse);
+           var node = selectMenuItem(context, 'orthogonalize').node();

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
+           if (!node) {
+             return continueTo(rightClickHouse);

            }
 
            }
 

+           var wasChanged = false;
+           reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
+             padding: 50
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'browse') {
+               continueTo(rightClickHouse);
+             } else if (mode.id === 'move' || mode.id === 'rotate') {
+               continueTo(retryClickSquare);
+             }
+           });
+           context.map().on('move.intro', function () {
+             var node = selectMenuItem(context, 'orthogonalize').node();
+
+             if (!wasChanged && !node) {
+               return continueTo(rightClickHouse);
+             }
+
+             reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
+               duration: 0,
+               padding: 50
+             });
+           });
+           context.history().on('change.intro', function () {
+             wasChanged = true;
+             context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.

 
 

-           function continueHouse() {
-               if (context.mode().id !== 'draw-area') {
-                   return continueTo(addHouse);
+             timeout(function () {
+               if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
+                 n: 1
+               })) {
+                 continueTo(doneSquare);
+               } else {
+                 continueTo(retryClickSquare);

                }
                }

+             }, 500); // after transitioned actions
+           });

 
 

-               _houseID = null;
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }

 
 

-               var continueString = helpString('intro.buildings.continue_building') + '{br}' +
-                   helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-                   helpString('intro.buildings.finish_building');
+         function retryClickSquare() {
+           context.enter(modeBrowse(context));
+           revealHouse(house, helpHtml('intro.buildings.retry_square'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(rightClickHouse);
+             }
+           });

 
 

-               revealHouse(house, continueString);
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   revealHouse(house, continueString, { duration: 0 });
-               });
+         function doneSquare() {
+           context.history().checkpoint('doneSquare');
+           revealHouse(house, helpHtml('intro.buildings.done_square'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(addTank);
+             }
+           });

 
 

-               context.on('enter.intro', function(mode) {
-                   if (mode.id === 'draw-area') {
-                       return;
-                   } else if (mode.id === 'select') {
-                       var graph = context.graph();
-                       var way = context.entity(context.selectedIDs()[0]);
-                       var nodes = graph.childNodes(way);
-                       var points = utilArrayUniq(nodes)
-                           .map(function(n) { return context.projection(n.loc); });
-
-                       if (isMostlySquare(points)) {
-                           _houseID = way.id;
-                           return continueTo(chooseCategoryBuilding);
-                       } else {
-                           return continueTo(retryHouse);
-                       }
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }

 
 

-                   } else {
-                       return chapter.restart();
-                   }
-               });
+         function addTank() {
+           context.enter(modeBrowse(context));
+           context.history().reset('doneSquare');
+           _tankID = null;
+           var msec = transitionTime(tank, context.map().center());

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });

            }
 
            }
 

+           context.map().centerZoomEase(tank, 19.5, msec);
+           timeout(function () {
+             reveal('button.add-area', helpHtml('intro.buildings.add_tank'));
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'add-area') return;
+               continueTo(startTank);
+             });
+           }, msec + 100);

 
 

-           function retryHouse() {
-               var onClick = function() { continueTo(addHouse); };
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-               revealHouse(house, helpString('intro.buildings.retry_building'),
-                   { buttonText: _t('intro.ok'), buttonCallback: onClick }
-               );
+         function startTank() {
+           if (context.mode().id !== 'add-area') {
+             return continueTo(addTank);
+           }

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   revealHouse(house, helpString('intro.buildings.retry_building'),
-                       { duration: 0, buttonText: _t('intro.ok'), buttonCallback: onClick }
-                   );
+           _tankID = null;
+           timeout(function () {
+             var startString = helpHtml('intro.buildings.start_tank') + helpHtml('intro.buildings.tank_edge_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
+             revealTank(tank, startString);
+             context.map().on('move.intro drawn.intro', function () {
+               revealTank(tank, startString, {
+                 duration: 0

                });
                });

+             });
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'draw-area') return chapter.restart();
+               continueTo(continueTank);
+             });
+           }, 550); // after easing

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function continueTank() {
+           if (context.mode().id !== 'draw-area') {
+             return continueTo(addTank);
+           }

 
 

-           function chooseCategoryBuilding() {
-               if (!_houseID || !context.hasEntity(_houseID)) {
-                   return addHouse();
-               }
-               var ids = context.selectedIDs();
-               if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-                   context.enter(modeSelect(context, [_houseID]));
-               }
-
-               // disallow scrolling
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           _tankID = null;
+           var continueString = helpHtml('intro.buildings.continue_tank') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_tank');
+           revealTank(tank, continueString);
+           context.map().on('move.intro drawn.intro', function () {
+             revealTank(tank, continueString, {
+               duration: 0
+             });
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-area') {
+               return;
+             } else if (mode.id === 'select') {
+               _tankID = context.selectedIDs()[0];
+               return continueTo(searchPresetTank);
+             } else {
+               return continueTo(addTank);
+             }
+           });

 
 

-               timeout(function() {
-                   // reset pane, in case user somehow happened to change it..
-                   context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }

 
 

-                   var button = context.container().select('.preset-category-building .preset-list-button');
+         function searchPresetTank() {
+           if (!_tankID || !context.hasEntity(_tankID)) {
+             return addTank();
+           }

 
 

-                   reveal(button.node(),
-                       helpString('intro.buildings.choose_category_building', { category: buildingCatetory.name() })
-                   );
+           var ids = context.selectedIDs();

 
 

-                   button.on('click.intro', function() {
-                       button.on('click.intro', null);
-                       continueTo(choosePresetHouse);
-                   });
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+             context.enter(modeSelect(context, [_tankID]));
+           } // disallow scrolling

 
 

-               }, 400);  // after preset list pane visible..

 
 

+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             // reset pane, in case user somehow happened to change it..
+             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+             context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+             reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
+               preset: tankPreset.name()
+             }));
+           }, 400); // after preset list pane visible..

 
 

-               context.on('enter.intro', function(mode) {
-                   if (!_houseID || !context.hasEntity(_houseID)) {
-                       return continueTo(addHouse);
-                   }
-                   var ids = context.selectedIDs();
-                   if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-                       return continueTo(chooseCategoryBuilding);
-                   }
-               });
+           context.on('enter.intro', function (mode) {
+             if (!_tankID || !context.hasEntity(_tankID)) {
+               return continueTo(addTank);
+             }

 
 

-               function continueTo(nextStep) {
-                   context.container().select('.inspector-wrap').on('wheel.intro', null);
-                   context.container().select('.preset-list-button').on('click.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
-           }
+             var ids = context.selectedIDs();

 
 

+             if (mode.id !== 'select' || !ids.length || ids[0] !== _tankID) {
+               // keep the user's area selected..
+               context.enter(modeSelect(context, [_tankID])); // reset pane, in case user somehow happened to change it..

 
 

-           function choosePresetHouse() {
-               if (!_houseID || !context.hasEntity(_houseID)) {
-                   return addHouse();
-               }
-               var ids = context.selectedIDs();
-               if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-                   context.enter(modeSelect(context, [_houseID]));
-               }
+               context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling

 
 

-               // disallow scrolling

                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
                context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);

+               context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+               reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
+                 preset: tankPreset.name()
+               }));
+               context.history().on('change.intro', null);
+             }
+           });
+
+           function checkPresetSearch() {
+             var first = context.container().select('.preset-list-item:first-child');
+
+             if (first.classed('preset-man_made-storage_tank')) {
+               reveal(first.select('.preset-list-button').node(), helpHtml('intro.buildings.choose_tank', {
+                 preset: tankPreset.name()
+               }), {
+                 duration: 300
+               });
+               context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+               context.history().on('change.intro', function () {
+                 continueTo(closeEditorTank);
+               });
+             }
+           }
+
+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+             nextStep();
+           }
+         }

 
 

-               timeout(function() {
-                   // reset pane, in case user somehow happened to change it..
-                   context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+         function closeEditorTank() {
+           if (!_tankID || !context.hasEntity(_tankID)) {
+             return addTank();
+           }

 
 

-                   var button = context.container().select('.preset-building-house .preset-list-button');
+           var ids = context.selectedIDs();

 
 

-                   reveal(button.node(),
-                       helpString('intro.buildings.choose_preset_house', { preset: housePreset.name() }),
-                       { duration: 300 }
-                   );
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+             context.enter(modeSelect(context, [_tankID]));
+           }

 
 

-                   button.on('click.intro', function() {
-                       button.on('click.intro', null);
-                       continueTo(closeEditorHouse);
-                   });
+           context.history().checkpoint('hasTank');
+           context.on('exit.intro', function () {
+             continueTo(rightClickTank);
+           });
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
+               button: icon('#iD-icon-close', 'inline')
+             }));
+           }, 500);

 
 

-               }, 400);  // after preset list pane visible..
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
+         }

 
 

-               context.on('enter.intro', function(mode) {
-                   if (!_houseID || !context.hasEntity(_houseID)) {
-                       return continueTo(addHouse);
-                   }
-                   var ids = context.selectedIDs();
-                   if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-                       return continueTo(chooseCategoryBuilding);
-                   }
+         function rightClickTank() {
+           if (!_tankID) return continueTo(addTank);
+           context.enter(modeBrowse(context));
+           context.history().reset('hasTank');
+           context.map().centerEase(tank, 500);
+           timeout(function () {
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'select') return;
+               var ids = context.selectedIDs();
+               if (ids.length !== 1 || ids[0] !== _tankID) return;
+               timeout(function () {
+                 var node = selectMenuItem(context, 'circularize').node();
+                 if (!node) return;
+                 continueTo(clickCircle);
+               }, 50); // after menu visible
+             });
+             var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_tank' : 'edit_menu_tank_touch'));
+             revealTank(tank, rightclickString);
+             context.map().on('move.intro drawn.intro', function () {
+               revealTank(tank, rightclickString, {
+                 duration: 0

                });
                });

+             });
+             context.history().on('change.intro', function () {
+               continueTo(rightClickTank);
+             });
+           }, 600);

 
 

-               function continueTo(nextStep) {
-                   context.container().select('.inspector-wrap').on('wheel.intro', null);
-                   context.container().select('.preset-list-button').on('click.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function clickCircle() {
+           if (!_tankID) return chapter.restart();
+           var entity = context.hasEntity(_tankID);
+           if (!entity) return continueTo(rightClickTank);
+           var node = selectMenuItem(context, 'circularize').node();

 
 

-           function closeEditorHouse() {
-               if (!_houseID || !context.hasEntity(_houseID)) {
-                   return addHouse();
-               }
-               var ids = context.selectedIDs();
-               if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-                   context.enter(modeSelect(context, [_houseID]));
-               }
+           if (!node) {
+             return continueTo(rightClickTank);
+           }

 
 

-               context.history().checkpoint('hasHouse');
+           var wasChanged = false;
+           reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
+             padding: 50
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'browse') {
+               continueTo(rightClickTank);
+             } else if (mode.id === 'move' || mode.id === 'rotate') {
+               continueTo(retryClickCircle);
+             }
+           });
+           context.map().on('move.intro', function () {
+             var node = selectMenuItem(context, 'circularize').node();

 
 

-               context.on('exit.intro', function() {
-                   continueTo(rightClickHouse);
-               });
+             if (!wasChanged && !node) {
+               return continueTo(rightClickTank);
+             }

 
 

-               timeout(function() {
-                   reveal('.entity-editor-pane',
-                       helpString('intro.buildings.close', { button: icon('#iD-icon-close', 'pre-text') })
-                   );
-               }, 500);
+             reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
+               duration: 0,
+               padding: 50
+             });
+           });
+           context.history().on('change.intro', function () {
+             wasChanged = true;
+             context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   nextStep();
+             timeout(function () {
+               if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
+                 n: 1
+               })) {
+                 continueTo(play);
+               } else {
+                 continueTo(retryClickCircle);

                }
                }

+             }, 500); // after transitioned actions
+           });
+
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();

            }
            }

+         }

 
 

+         function retryClickCircle() {
+           context.enter(modeBrowse(context));
+           revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(rightClickTank);
+             }
+           });

 
 

-           function rightClickHouse() {
-               if (!_houseID) { return chapter.restart(); }
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }

 
 

-               context.enter(modeBrowse(context));
-               context.history().reset('hasHouse');
-               var zoom = context.map().zoom();
-               if (zoom < 20) {
-                   zoom = 20;
-               }
-               context.map().centerZoomEase(house, zoom, 500);
-
-               context.on('enter.intro', function(mode) {
-                   if (mode.id !== 'select') { return; }
-                   var ids = context.selectedIDs();
-                   if (ids.length !== 1 || ids[0] !== _houseID) { return; }
-
-                   timeout(function() {
-                       var node = selectMenuItem(context, 'orthogonalize').node();
-                       if (!node) { return; }
-                       continueTo(clickSquare);
-                   }, 50);  // after menu visible
-               });
+         function play() {
+           dispatch.call('done');
+           reveal('.ideditor', helpHtml('intro.buildings.play', {
+             next: _t('intro.startediting.title')
+           }), {
+             tooltipBox: '.intro-nav-wrap .chapter-startEditing',
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               reveal('.ideditor');
+             }
+           });
+         }

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   var rightclickString = helpString('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_building' : 'edit_menu_building_touch'));
-                   revealHouse(house, rightclickString, { duration: 0 });
-               });
+         chapter.enter = function () {
+           addHouse();
+         };

 
 

-               context.history().on('change.intro', function() {
-                   continueTo(rightClickHouse);
-               });
+         chapter.exit = function () {
+           timeouts.forEach(window.clearTimeout);
+           context.on('enter.intro exit.intro', null);
+           context.map().on('move.intro drawn.intro', null);
+           context.history().on('change.intro', null);
+           context.container().select('.inspector-wrap').on('wheel.intro', null);
+           context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+           context.container().select('.more-fields .combobox-input').on('click.intro', null);
+         };

 
 

-               function continueTo(nextStep) {
-                   context.on('enter.intro', null);
-                   context.map().on('move.intro drawn.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
-           }
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };

 
 

+         return utilRebind(chapter, dispatch, 'on');
+       }

 
 

-           function clickSquare() {
-               if (!_houseID) { return chapter.restart(); }
-               var entity = context.hasEntity(_houseID);
-               if (!entity) { return continueTo(rightClickHouse); }
+       function uiIntroStartEditing(context, reveal) {
+         var dispatch = dispatch$8('done', 'startEditing');
+         var modalSelection = select(null);
+         var chapter = {
+           title: 'intro.startediting.title'
+         };

 
 

-               var node = selectMenuItem(context, 'orthogonalize').node();
-               if (!node) { return continueTo(rightClickHouse); }
+         function showHelp() {
+           reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               shortcuts();
+             }
+           });
+         }

 
 

-               var wasChanged = false;
+         function shortcuts() {
+           reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               showSave();
+             }
+           });
+         }

 
 

-               reveal('.edit-menu',
-                   helpString('intro.buildings.square_building'),
-                   { padding: 50 }
-               );
+         function showSave() {
+           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts

 
 

-               context.on('enter.intro', function(mode) {
-                   if (mode.id === 'browse') {
-                       continueTo(rightClickHouse);
-                   } else if (mode.id === 'move' || mode.id === 'rotate') {
-                       continueTo(retryClickSquare);
-                   }
-               });
+           reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               showStart();
+             }
+           });
+         }

 
 

-               context.map().on('move.intro', function() {
-                   var node = selectMenuItem(context, 'orthogonalize').node();
-                   if (!wasChanged && !node) { return continueTo(rightClickHouse); }
+         function showStart() {
+           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts

 
 

-                   reveal('.edit-menu',
-                       helpString('intro.buildings.square_building'),
-                       { duration: 0, padding: 50 }
-                   );
-               });
+           modalSelection = uiModal(context.container());
+           modalSelection.select('.modal').attr('class', 'modal-splash modal');
+           modalSelection.selectAll('.close').remove();
+           var startbutton = modalSelection.select('.content').attr('class', 'fillL').append('button').attr('class', 'modal-section huge-modal-button').on('click', function () {
+             modalSelection.remove();
+           });
+           startbutton.append('svg').attr('class', 'illustration').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+           startbutton.append('h2').html(_t.html('intro.startediting.start'));
+           dispatch.call('startEditing');
+         }

 
 

-               context.history().on('change.intro', function() {
-                   wasChanged = true;
-                   context.history().on('change.intro', null);
+         chapter.enter = function () {
+           showHelp();
+         };

 
 

-                   // Something changed.  Wait for transition to complete and check undo annotation.
-                   timeout(function() {
-                       if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature.single')) {
-                           continueTo(doneSquare);
-                       } else {
-                           continueTo(retryClickSquare);
-                       }
-                   }, 500);  // after transitioned actions
-               });
+         chapter.exit = function () {
+           modalSelection.remove();
+           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+         };

 
 

-               function continueTo(nextStep) {
-                   context.on('enter.intro', null);
-                   context.map().on('move.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
+         return utilRebind(chapter, dispatch, 'on');
+       }
+
+       var chapterUi = {
+         welcome: uiIntroWelcome,
+         navigation: uiIntroNavigation,
+         point: uiIntroPoint,
+         area: uiIntroArea,
+         line: uiIntroLine,
+         building: uiIntroBuilding,
+         startEditing: uiIntroStartEditing
+       };
+       var chapterFlow = ['welcome', 'navigation', 'point', 'area', 'line', 'building', 'startEditing'];
+       function uiIntro(context) {
+         var INTRO_IMAGERY = 'EsriWorldImageryClarity';
+         var _introGraph = {};
+
+         var _currChapter;
+
+         function intro(selection) {
+           _mainFileFetcher.get('intro_graph').then(function (dataIntroGraph) {
+             // create entities for intro graph and localize names
+             for (var id in dataIntroGraph) {
+               if (!_introGraph[id]) {
+                 _introGraph[id] = osmEntity(localize(dataIntroGraph[id]));

                }
                }

-           }
+             }

 
 

+             selection.call(startIntro);
+           })["catch"](function () {
+             /* ignore */
+           });
+         }

 
 

-           function retryClickSquare() {
-               context.enter(modeBrowse(context));
+         function startIntro(selection) {
+           context.enter(modeBrowse(context)); // Save current map state

 
 

-               revealHouse(house, helpString('intro.buildings.retry_square'), {
-                   buttonText: _t('intro.ok'),
-                   buttonCallback: function() { continueTo(rightClickHouse); }
-               });
+           var osm = context.connection();
+           var history = context.history().toJSON();
+           var hash = window.location.hash;
+           var center = context.map().center();
+           var zoom = context.map().zoom();
+           var background = context.background().baseLayerSource();
+           var overlays = context.background().overlayLayerSources();
+           var opacity = context.container().selectAll('.main-map .layer-background').style('opacity');
+           var caches = osm && osm.caches();
+           var baseEntities = context.history().graph().base().entities; // Show sidebar and disable the sidebar resizing button
+           // (this needs to be before `context.inIntro(true)`)

 
 

-               function continueTo(nextStep) {
-                   nextStep();
-               }
-           }
+           context.ui().sidebar.expand();
+           context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving

 
 

+           context.inIntro(true); // Load semi-real data used in intro

 
 

-           function doneSquare() {
-               context.history().checkpoint('doneSquare');
+           if (osm) {
+             osm.toggle(false).reset();
+           }

 
 

-               revealHouse(house, helpString('intro.buildings.done_square'), {
-                   buttonText: _t('intro.ok'),
-                   buttonCallback: function() { continueTo(addTank); }
-               });
+           context.history().reset();
+           context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
+           context.history().checkpoint('initial'); // Setup imagery

 
 

-               function continueTo(nextStep) {
-                   nextStep();
-               }
+           var imagery = context.background().findSource(INTRO_IMAGERY);
+
+           if (imagery) {
+             context.background().baseLayerSource(imagery);
+           } else {
+             context.background().bing();

            }
 
            }
 

+           overlays.forEach(function (d) {
+             return context.background().toggleOverlayLayer(d);
+           }); // Setup data layers (only OSM)

 
 

-           function addTank() {
-               context.enter(modeBrowse(context));
-               context.history().reset('doneSquare');
-               _tankID = null;
+           var layers = context.layers();
+           layers.all().forEach(function (item) {
+             // if the layer has the function `enabled`
+             if (typeof item.layer.enabled === 'function') {
+               item.layer.enabled(item.id === 'osm');
+             }
+           });
+           context.container().selectAll('.main-map .layer-background').style('opacity', 1);
+           var curtain = uiCurtain(context.container().node());
+           selection.call(curtain); // Store that the user started the walkthrough..

 
 

-               var msec = transitionTime(tank, context.map().center());
-               if (msec) { reveal(null, null, { duration: 0 }); }
-               context.map().centerZoomEase(tank, 19.5, msec);
+           corePreferences('walkthrough_started', 'yes'); // Restore previous walkthrough progress..

 
 

-               timeout(function() {
-                   reveal('button.add-area',
-                       helpString('intro.buildings.add_tank')
-                   );
+           var storedProgress = corePreferences('walkthrough_progress') || '';
+           var progress = storedProgress.split(';').filter(Boolean);
+           var chapters = chapterFlow.map(function (chapter, i) {
+             var s = chapterUi[chapter](context, curtain.reveal).on('done', function () {
+               buttons.filter(function (d) {
+                 return d.title === s.title;
+               }).classed('finished', true);

 
 

-                   context.on('enter.intro', function(mode) {
-                       if (mode.id !== 'add-area') { return; }
-                       continueTo(startTank);
-                   });
-               }, msec + 100);
+               if (i < chapterFlow.length - 1) {
+                 var next = chapterFlow[i + 1];
+                 context.container().select("button.chapter-".concat(next)).classed('next', true);
+               } // Store walkthrough progress..

 
 

-               function continueTo(nextStep) {
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
-           }

 
 

+               progress.push(chapter);
+               corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
+             });
+             return s;
+           });
+           chapters[chapters.length - 1].on('startEditing', function () {
+             // Store walkthrough progress..
+             progress.push('startEditing');
+             corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';')); // Store if walkthrough is completed..

 
 

-           function startTank() {
-               if (context.mode().id !== 'add-area') {
-                   return continueTo(addTank);
-               }
+             var incomplete = utilArrayDifference(chapterFlow, progress);
+
+             if (!incomplete.length) {
+               corePreferences('walkthrough_completed', 'yes');
+             }
+
+             curtain.remove();
+             navwrap.remove();
+             context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
+             context.container().selectAll('button.sidebar-toggle').classed('disabled', false);

 
 

-               _tankID = null;
+             if (osm) {
+               osm.toggle(true).reset().caches(caches);
+             }

 
 

-               timeout(function() {
-                   var startString = helpString('intro.buildings.start_tank') +
-                       helpString('intro.buildings.tank_edge_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
-                   revealTank(tank, startString);
+             context.history().reset().merge(Object.values(baseEntities));
+             context.background().baseLayerSource(background);
+             overlays.forEach(function (d) {
+               return context.background().toggleOverlayLayer(d);
+             });

 
 

-                   context.map().on('move.intro drawn.intro', function() {
-                       revealTank(tank, startString, { duration: 0 });
-                   });
+             if (history) {
+               context.history().fromJSON(history, false);
+             }
+
+             context.map().centerZoom(center, zoom);
+             window.location.replace(hash);
+             context.inIntro(false);
+           });
+           var navwrap = selection.append('div').attr('class', 'intro-nav-wrap fillD');
+           navwrap.append('svg').attr('class', 'intro-nav-wrap-logo').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+           var buttonwrap = navwrap.append('div').attr('class', 'joined').selectAll('button.chapter');
+           var buttons = buttonwrap.data(chapters).enter().append('button').attr('class', function (d, i) {
+             return "chapter chapter-".concat(chapterFlow[i]);
+           }).on('click', enterChapter);
+           buttons.append('span').html(function (d) {
+             return _t.html(d.title);
+           });
+           buttons.append('span').attr('class', 'status').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
+           enterChapter(null, chapters[0]);
+
+           function enterChapter(d3_event, newChapter) {
+             if (_currChapter) {
+               _currChapter.exit();
+             }

 
 

-                   context.on('enter.intro', function(mode) {
-                       if (mode.id !== 'draw-area') { return chapter.restart(); }
-                       continueTo(continueTank);
-                   });
+             context.enter(modeBrowse(context));
+             _currChapter = newChapter;

 
 

-               }, 550);  // after easing
+             _currChapter.enter();

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
+             buttons.classed('next', false).classed('active', function (d) {
+               return d.title === _currChapter.title;
+             });

            }
            }

+         }

 
 

+         return intro;
+       }

 
 

-           function continueTank() {
-               if (context.mode().id !== 'draw-area') {
-                   return continueTo(addTank);
-               }
+       function uiIssuesInfo(context) {
+         var warningsItem = {
+           id: 'warnings',
+           count: 0,
+           iconID: 'iD-icon-alert',
+           descriptionID: 'issues.warnings_and_errors'
+         };
+         var resolvedItem = {
+           id: 'resolved',
+           count: 0,
+           iconID: 'iD-icon-apply',
+           descriptionID: 'issues.user_resolved_issues'
+         };
+
+         function update(selection) {
+           var shownItems = [];
+           var liveIssues = context.validator().getIssues({
+             what: corePreferences('validate-what') || 'edited',
+             where: corePreferences('validate-where') || 'all'
+           });

 
 

-               _tankID = null;
+           if (liveIssues.length) {
+             warningsItem.count = liveIssues.length;
+             shownItems.push(warningsItem);
+           }

 
 

-               var continueString = helpString('intro.buildings.continue_tank') + '{br}' +
-                   helpString('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) +
-                   helpString('intro.buildings.finish_tank');
+           if (corePreferences('validate-what') === 'all') {
+             var resolvedIssues = context.validator().getResolvedIssues();

 
 

-               revealTank(tank, continueString);
+             if (resolvedIssues.length) {
+               resolvedItem.count = resolvedIssues.length;
+               shownItems.push(resolvedItem);
+             }
+           }

 
 

-               context.map().on('move.intro drawn.intro', function() {
-                   revealTank(tank, continueString, { duration: 0 });
-               });
+           var chips = selection.selectAll('.chip').data(shownItems, function (d) {
+             return d.id;
+           });
+           chips.exit().remove();
+           var enter = chips.enter().append('a').attr('class', function (d) {
+             return 'chip ' + d.id + '-count';
+           }).attr('href', '#').each(function (d) {
+             var chipSelection = select(this);
+             var tooltipBehavior = uiTooltip().placement('top').title(_t.html(d.descriptionID));
+             chipSelection.call(tooltipBehavior).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               tooltipBehavior.hide(select(this)); // open the Issues pane
+
+               context.ui().togglePanes(context.container().select('.map-panes .issues-pane'));
+             });
+             chipSelection.call(svgIcon('#' + d.iconID));
+           });
+           enter.append('span').attr('class', 'count');
+           enter.merge(chips).selectAll('span.count').html(function (d) {
+             return d.count.toString();
+           });
+         }

 
 

-               context.on('enter.intro', function(mode) {
-                   if (mode.id === 'draw-area') {
-                       return;
-                   } else if (mode.id === 'select') {
-                       _tankID = context.selectedIDs()[0];
-                       return continueTo(searchPresetTank);
-                   } else {
-                       return continueTo(addTank);
-                   }
-               });
+         return function (selection) {
+           update(selection);
+           context.validator().on('validated.infobox', function () {
+             update(selection);
+           });
+         };
+       }

 
 

-               function continueTo(nextStep) {
-                   context.map().on('move.intro drawn.intro', null);
-                   context.on('enter.intro', null);
-                   nextStep();
-               }
-           }
+       function uiMapInMap(context) {
+         function mapInMap(selection) {
+           var backgroundLayer = rendererTileLayer(context);
+           var overlayLayers = {};
+           var projection = geoRawMercator();
+           var dataLayer = svgData(projection, context).showLabels(false);
+           var debugLayer = svgDebug(projection, context);
+           var zoom = d3_zoom().scaleExtent([geoZoomToScale(0.5), geoZoomToScale(24)]).on('start', zoomStarted).on('zoom', zoomed).on('end', zoomEnded);
+           var wrap = select(null);
+           var tiles = select(null);
+           var viewport = select(null);
+           var _isTransformed = false;
+           var _isHidden = true;
+           var _skipEvents = false;
+           var _gesture = null;
+           var _zDiff = 6; // by default, minimap renders at (main zoom - 6)

 
 

+           var _dMini; // dimensions of minimap

 
 

-           function searchPresetTank() {
-               if (!_tankID || !context.hasEntity(_tankID)) {
-                   return addTank();
-               }
-               var ids = context.selectedIDs();
-               if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-                   context.enter(modeSelect(context, [_tankID]));
-               }

 
 

-               // disallow scrolling
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           var _cMini; // center pixel of minimap

 
 

-               timeout(function() {
-                   // reset pane, in case user somehow happened to change it..
-                   context.container().select('.inspector-wrap .panewrap').style('right', '-100%');

 
 

-                   context.container().select('.preset-search-input')
-                       .on('keydown.intro', null)
-                       .on('keyup.intro', checkPresetSearch);
+           var _tStart; // transform at start of gesture

 
 

-                   reveal('.preset-search-input',
-                       helpString('intro.buildings.search_tank', { preset: tankPreset.name() })
-                   );
-               }, 400);  // after preset list pane visible..

 
 

-               context.on('enter.intro', function(mode) {
-                   if (!_tankID || !context.hasEntity(_tankID)) {
-                       return continueTo(addTank);
-                   }
+           var _tCurr; // transform at most recent event

 
 

-                   var ids = context.selectedIDs();
-                   if (mode.id !== 'select' || !ids.length || ids[0] !== _tankID) {
-                       // keep the user's area selected..
-                       context.enter(modeSelect(context, [_tankID]));

 
 

-                       // reset pane, in case user somehow happened to change it..
-                       context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
-                       // disallow scrolling
-                       context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           var _timeoutID;

 
 

-                       context.container().select('.preset-search-input')
-                           .on('keydown.intro', null)
-                           .on('keyup.intro', checkPresetSearch);
+           function zoomStarted() {
+             if (_skipEvents) return;
+             _tStart = _tCurr = projection.transform();
+             _gesture = null;
+           }

 
 

-                       reveal('.preset-search-input',
-                           helpString('intro.buildings.search_tank', { preset: tankPreset.name() })
-                       );
+           function zoomed(d3_event) {
+             if (_skipEvents) return;
+             var x = d3_event.transform.x;
+             var y = d3_event.transform.y;
+             var k = d3_event.transform.k;
+             var isZooming = k !== _tStart.k;
+             var isPanning = x !== _tStart.x || y !== _tStart.y;

 
 

-                       context.history().on('change.intro', null);
-                   }
-               });
+             if (!isZooming && !isPanning) {
+               return; // no change
+             } // lock in either zooming or panning, don't allow both in minimap.

 
 

-               function checkPresetSearch() {
-                   var first = context.container().select('.preset-list-item:first-child');

 
 

-                   if (first.classed('preset-man_made-storage_tank')) {
-                       reveal(first.select('.preset-list-button').node(),
-                           helpString('intro.buildings.choose_tank', { preset: tankPreset.name() }),
-                           { duration: 300 }
-                       );
+             if (!_gesture) {
+               _gesture = isZooming ? 'zoom' : 'pan';
+             }

 
 

-                       context.container().select('.preset-search-input')
-                           .on('keydown.intro', eventCancel, true)
-                           .on('keyup.intro', null);
+             var tMini = projection.transform();
+             var tX, tY, scale;

 
 

-                       context.history().on('change.intro', function() {
-                           continueTo(closeEditorTank);
-                       });
-                   }
-               }
+             if (_gesture === 'zoom') {
+               scale = k / tMini.k;
+               tX = (_cMini[0] / scale - _cMini[0]) * scale;
+               tY = (_cMini[1] / scale - _cMini[1]) * scale;
+             } else {
+               k = tMini.k;
+               scale = 1;
+               tX = x - tMini.x;
+               tY = y - tMini.y;
+             }

 
 

-               function continueTo(nextStep) {
-                   context.container().select('.inspector-wrap').on('wheel.intro', null);
-                   context.on('enter.intro', null);
-                   context.history().on('change.intro', null);
-                   context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-                   nextStep();
-               }
-           }
+             utilSetTransform(tiles, tX, tY, scale);
+             utilSetTransform(viewport, 0, 0, scale);
+             _isTransformed = true;
+             _tCurr = identity$2.translate(x, y).scale(k);
+             var zMain = geoScaleToZoom(context.projection.scale());
+             var zMini = geoScaleToZoom(k);
+             _zDiff = zMain - zMini;
+             queueRedraw();
+           }
+
+           function zoomEnded() {
+             if (_skipEvents) return;
+             if (_gesture !== 'pan') return;
+             updateProjection();
+             _gesture = null;
+             context.map().center(projection.invert(_cMini)); // recenter main map..
+           }
+
+           function updateProjection() {
+             var loc = context.map().center();
+             var tMain = context.projection.transform();
+             var zMain = geoScaleToZoom(tMain.k);
+             var zMini = Math.max(zMain - _zDiff, 0.5);
+             var kMini = geoZoomToScale(zMini);
+             projection.translate([tMain.x, tMain.y]).scale(kMini);
+             var point = projection(loc);
+             var mouse = _gesture === 'pan' ? geoVecSubtract([_tCurr.x, _tCurr.y], [_tStart.x, _tStart.y]) : [0, 0];
+             var xMini = _cMini[0] - point[0] + tMain.x + mouse[0];
+             var yMini = _cMini[1] - point[1] + tMain.y + mouse[1];
+             projection.translate([xMini, yMini]).clipExtent([[0, 0], _dMini]);
+             _tCurr = projection.transform();
+
+             if (_isTransformed) {
+               utilSetTransform(tiles, 0, 0);
+               utilSetTransform(viewport, 0, 0);
+               _isTransformed = false;
+             }

 
 

+             zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
+             _skipEvents = true;
+             wrap.call(zoom.transform, _tCurr);
+             _skipEvents = false;
+           }

 
 

-           function closeEditorTank() {
-               if (!_tankID || !context.hasEntity(_tankID)) {
-                   return addTank();
-               }
-               var ids = context.selectedIDs();
-               if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-                   context.enter(modeSelect(context, [_tankID]));
-               }
+           function redraw() {
+             clearTimeout(_timeoutID);
+             if (_isHidden) return;
+             updateProjection();
+             var zMini = geoScaleToZoom(projection.scale()); // setup tile container

 
 

-               context.history().checkpoint('hasTank');
+             tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
+             tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background

 
 

-               context.on('exit.intro', function() {
-                   continueTo(rightClickTank);
-               });
+             backgroundLayer.source(context.background().baseLayerSource()).projection(projection).dimensions(_dMini);
+             var background = tiles.selectAll('.map-in-map-background').data([0]);
+             background.enter().append('div').attr('class', 'map-in-map-background').merge(background).call(backgroundLayer); // redraw overlay

 
 

-               timeout(function() {
-                   reveal('.entity-editor-pane',
-                       helpString('intro.buildings.close', { button: icon('#iD-icon-close', 'pre-text') })
-                   );
-               }, 500);
+             var overlaySources = context.background().overlayLayerSources();
+             var activeOverlayLayers = [];

 
 

-               function continueTo(nextStep) {
-                   context.on('exit.intro', null);
-                   nextStep();
+             for (var i = 0; i < overlaySources.length; i++) {
+               if (overlaySources[i].validZoom(zMini)) {
+                 if (!overlayLayers[i]) overlayLayers[i] = rendererTileLayer(context);
+                 activeOverlayLayers.push(overlayLayers[i].source(overlaySources[i]).projection(projection).dimensions(_dMini));

                }
                }

+             }
+
+             var overlay = tiles.selectAll('.map-in-map-overlay').data([0]);
+             overlay = overlay.enter().append('div').attr('class', 'map-in-map-overlay').merge(overlay);
+             var overlays = overlay.selectAll('div').data(activeOverlayLayers, function (d) {
+               return d.source().name();
+             });
+             overlays.exit().remove();
+             overlays = overlays.enter().append('div').merge(overlays).each(function (layer) {
+               select(this).call(layer);
+             });
+             var dataLayers = tiles.selectAll('.map-in-map-data').data([0]);
+             dataLayers.exit().remove();
+             dataLayers = dataLayers.enter().append('svg').attr('class', 'map-in-map-data').merge(dataLayers).call(dataLayer).call(debugLayer); // redraw viewport bounding box
+
+             if (_gesture !== 'pan') {
+               var getPath = d3_geoPath(projection);
+               var bbox = {
+                 type: 'Polygon',
+                 coordinates: [context.map().extent().polygon()]
+               };
+               viewport = wrap.selectAll('.map-in-map-viewport').data([0]);
+               viewport = viewport.enter().append('svg').attr('class', 'map-in-map-viewport').merge(viewport);
+               var path = viewport.selectAll('.map-in-map-bbox').data([bbox]);
+               path.enter().append('path').attr('class', 'map-in-map-bbox').merge(path).attr('d', getPath).classed('thick', function (d) {
+                 return getPath.area(d) < 30;
+               });
+             }

            }
 
            }
 

+           function queueRedraw() {
+             clearTimeout(_timeoutID);
+             _timeoutID = setTimeout(function () {
+               redraw();
+             }, 750);
+           }

 
 

-           function rightClickTank() {
-               if (!_tankID) { return continueTo(addTank); }
+           function toggle(d3_event) {
+             if (d3_event) d3_event.preventDefault();
+             _isHidden = !_isHidden;
+             context.container().select('.minimap-toggle-item').classed('active', !_isHidden).select('input').property('checked', !_isHidden);

 
 

-               context.enter(modeBrowse(context));
-               context.history().reset('hasTank');
-               context.map().centerEase(tank, 500);
-
-               timeout(function() {
-                   context.on('enter.intro', function(mode) {
-                       if (mode.id !== 'select') { return; }
-                       var ids = context.selectedIDs();
-                       if (ids.length !== 1 || ids[0] !== _tankID) { return; }
-
-                       timeout(function() {
-                           var node = selectMenuItem(context, 'circularize').node();
-                           if (!node) { return; }
-                           continueTo(clickCircle);
-                       }, 50);  // after menu visible
-                   });
+             if (_isHidden) {
+               wrap.style('display', 'block').style('opacity', '1').transition().duration(200).style('opacity', '0').on('end', function () {
+                 selection.selectAll('.map-in-map').style('display', 'none');
+               });
+             } else {
+               wrap.style('display', 'block').style('opacity', '0').transition().duration(200).style('opacity', '1').on('end', function () {
+                 redraw();
+               });
+             }
+           }

 
 

-                   var rightclickString = helpString('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_tank' : 'edit_menu_tank_touch'));
+           uiMapInMap.toggle = toggle;
+           wrap = selection.selectAll('.map-in-map').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'map-in-map').style('display', _isHidden ? 'none' : 'block').call(zoom).on('dblclick.zoom', null).merge(wrap); // reflow warning: Hardcode dimensions - currently can't resize it anyway..

 
 

-                   revealTank(tank, rightclickString);
+           _dMini = [200, 150]; //utilGetDimensions(wrap);

 
 

-                   context.map().on('move.intro drawn.intro', function() {
-                       revealTank(tank, rightclickString, { duration: 0 });
-                   });
+           _cMini = geoVecScale(_dMini, 0.5);
+           context.map().on('drawn.map-in-map', function (drawn) {
+             if (drawn.full === true) {
+               redraw();
+             }
+           });
+           redraw();
+           context.keybinding().on(_t('background.minimap.key'), toggle);
+         }

 
 

-                   context.history().on('change.intro', function() {
-                       continueTo(rightClickTank);
-                   });
+         return mapInMap;
+       }

 
 

-               }, 600);
+       function uiNotice(context) {
+         return function (selection) {
+           var div = selection.append('div').attr('class', 'notice');
+           var button = div.append('button').attr('class', 'zoom-to notice fillD').on('click', function () {
+             context.map().zoomEase(context.minEditableZoom());
+           }).on('wheel', function (d3_event) {
+             // let wheel events pass through #4482
+             var e2 = new WheelEvent(d3_event.type, d3_event);
+             context.surface().node().dispatchEvent(e2);
+           });
+           button.call(svgIcon('#iD-icon-plus', 'pre-text')).append('span').attr('class', 'label').html(_t.html('zoom_in_edit'));

 
 

-               function continueTo(nextStep) {
-                   context.on('enter.intro', null);
-                   context.map().on('move.intro drawn.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
-               }
+           function disableTooHigh() {
+             var canEdit = context.map().zoom() >= context.minEditableZoom();
+             div.style('display', canEdit ? 'none' : 'block');

            }
 
            }
 

+           context.map().on('move.notice', debounce(disableTooHigh, 500));
+           disableTooHigh();
+         };
+       }

 
 

-           function clickCircle() {
-               if (!_tankID) { return chapter.restart(); }
-               var entity = context.hasEntity(_tankID);
-               if (!entity) { return continueTo(rightClickTank); }
+       function uiPhotoviewer(context) {
+         var dispatch = dispatch$8('resize');

 
 

-               var node = selectMenuItem(context, 'circularize').node();
-               if (!node) { return continueTo(rightClickTank); }
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

 
 

-               var wasChanged = false;
+         function photoviewer(selection) {
+           selection.append('button').attr('class', 'thumb-hide').on('click', function () {
+             if (services.streetside) {
+               services.streetside.hideViewer(context);
+             }

 
 

-               reveal('.edit-menu',
-                   helpString('intro.buildings.circle_tank'),
-                   { padding: 50 }
-               );
+             if (services.mapillary) {
+               services.mapillary.hideViewer(context);
+             }

 
 

-               context.on('enter.intro', function(mode) {
-                   if (mode.id === 'browse') {
-                       continueTo(rightClickTank);
-                   } else if (mode.id === 'move' || mode.id === 'rotate') {
-                       continueTo(retryClickCircle);
-                   }
-               });
+             if (services.openstreetcam) {
+               services.openstreetcam.hideViewer(context);
+             }
+           }).append('div').call(svgIcon('#iD-icon-close'));
+
+           function preventDefault(d3_event) {
+             d3_event.preventDefault();
+           }
+
+           selection.append('button').attr('class', 'resize-handle-xy').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+             resizeOnX: true,
+             resizeOnY: true
+           }));
+           selection.append('button').attr('class', 'resize-handle-x').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+             resizeOnX: true
+           }));
+           selection.append('button').attr('class', 'resize-handle-y').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+             resizeOnY: true
+           }));
+
+           function buildResizeListener(target, eventName, dispatch, options) {
+             var resizeOnX = !!options.resizeOnX;
+             var resizeOnY = !!options.resizeOnY;
+             var minHeight = options.minHeight || 240;
+             var minWidth = options.minWidth || 320;
+             var pointerId;
+             var startX;
+             var startY;
+             var startWidth;
+             var startHeight;
+
+             function startResize(d3_event) {
+               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               var mapSize = context.map().dimensions();
+
+               if (resizeOnX) {
+                 var maxWidth = mapSize[0];
+                 var newWidth = clamp(startWidth + d3_event.clientX - startX, minWidth, maxWidth);
+                 target.style('width', newWidth + 'px');
+               }
+
+               if (resizeOnY) {
+                 var maxHeight = mapSize[1] - 90; // preserve space at top/bottom of map
+
+                 var newHeight = clamp(startHeight + startY - d3_event.clientY, minHeight, maxHeight);
+                 target.style('height', newHeight + 'px');
+               }
+
+               dispatch.call(eventName, target, utilGetDimensions(target, true));
+             }

 
 

-               context.map().on('move.intro', function() {
-                   var node = selectMenuItem(context, 'circularize').node();
-                   if (!wasChanged && !node) { return continueTo(rightClickTank); }
+             function clamp(num, min, max) {
+               return Math.max(min, Math.min(num, max));
+             }

 
 

-                   reveal('.edit-menu',
-                       helpString('intro.buildings.circle_tank'),
-                       { duration: 0, padding: 50 }
-                   );
-               });
+             function stopResize(d3_event) {
+               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+               d3_event.preventDefault();
+               d3_event.stopPropagation(); // remove all the listeners we added

 
 

-               context.history().on('change.intro', function() {
-                   wasChanged = true;
-                   context.history().on('change.intro', null);
+               select(window).on('.' + eventName, null);
+             }

 
 

-                   // Something changed.  Wait for transition to complete and check undo annotation.
-                   timeout(function() {
-                       if (context.history().undoAnnotation() === _t('operations.circularize.annotation.single')) {
-                           continueTo(play);
-                       } else {
-                           continueTo(retryClickCircle);
-                       }
-                   }, 500);  // after transitioned actions
-               });
+             return function initResize(d3_event) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               pointerId = d3_event.pointerId || 'mouse';
+               startX = d3_event.clientX;
+               startY = d3_event.clientY;
+               var targetRect = target.node().getBoundingClientRect();
+               startWidth = targetRect.width;
+               startHeight = targetRect.height;
+               select(window).on(_pointerPrefix + 'move.' + eventName, startResize, false).on(_pointerPrefix + 'up.' + eventName, stopResize, false);

 
 

-               function continueTo(nextStep) {
-                   context.on('enter.intro', null);
-                   context.map().on('move.intro', null);
-                   context.history().on('change.intro', null);
-                   nextStep();
+               if (_pointerPrefix === 'pointer') {
+                 select(window).on('pointercancel.' + eventName, stopResize, false);

                }
                }

+             };

            }
            }

+         }

 
 

+         photoviewer.onMapResize = function () {
+           var photoviewer = context.container().select('.photoviewer');
+           var content = context.container().select('.main-content');
+           var mapDimensions = utilGetDimensions(content, true); // shrink photo viewer if it is too big
+           // (-90 preserves space at top and bottom of map used by menus)

 
 

-           function retryClickCircle() {
-               context.enter(modeBrowse(context));
-
-               revealTank(tank, helpString('intro.buildings.retry_circle'), {
-                   buttonText: _t('intro.ok'),
-                   buttonCallback: function() { continueTo(rightClickTank); }
-               });
-
-               function continueTo(nextStep) {
-                   nextStep();
-               }
-           }
-
+           var photoDimensions = utilGetDimensions(photoviewer, true);

 
 

-           function play() {
-               dispatch$1.call('done');
-               reveal('.ideditor',
-                   helpString('intro.buildings.play', { next: _t('intro.startediting.title') }), {
-                       tooltipBox: '.intro-nav-wrap .chapter-startEditing',
-                       buttonText: _t('intro.ok'),
-                       buttonCallback: function() { reveal('.ideditor'); }
-                   }
-               );
+           if (photoDimensions[0] > mapDimensions[0] || photoDimensions[1] > mapDimensions[1] - 90) {
+             var setPhotoDimensions = [Math.min(photoDimensions[0], mapDimensions[0]), Math.min(photoDimensions[1], mapDimensions[1] - 90)];
+             photoviewer.style('width', setPhotoDimensions[0] + 'px').style('height', setPhotoDimensions[1] + 'px');
+             dispatch.call('resize', photoviewer, setPhotoDimensions);

            }
            }

+         };

 
 

+         return utilRebind(photoviewer, dispatch, 'on');
+       }

 
 

-           chapter.enter = function() {
-               addHouse();
-           };
-
-
-           chapter.exit = function() {
-               timeouts.forEach(window.clearTimeout);
-               context.on('enter.intro exit.intro', null);
-               context.map().on('move.intro drawn.intro', null);
-               context.history().on('change.intro', null);
-               context.container().select('.inspector-wrap').on('wheel.intro', null);
-               context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-               context.container().select('.more-fields .combobox-input').on('click.intro', null);
-           };
-
+       function uiRestore(context) {
+         return function (selection) {
+           if (!context.history().hasRestorableChanges()) return;
+           var modalSelection = uiModal(selection, true);
+           modalSelection.select('.modal').attr('class', 'modal fillL');
+           var introModal = modalSelection.select('.content');
+           introModal.append('div').attr('class', 'modal-section').append('h3').html(_t.html('restore.heading'));
+           introModal.append('div').attr('class', 'modal-section').append('p').html(_t.html('restore.description'));
+           var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
+           var restore = buttonWrap.append('button').attr('class', 'restore').on('click', function () {
+             context.history().restore();
+             modalSelection.remove();
+           });
+           restore.append('svg').attr('class', 'logo logo-restore').append('use').attr('xlink:href', '#iD-logo-restore');
+           restore.append('div').html(_t.html('restore.restore'));
+           var reset = buttonWrap.append('button').attr('class', 'reset').on('click', function () {
+             context.history().clearSaved();
+             modalSelection.remove();
+           });
+           reset.append('svg').attr('class', 'logo logo-reset').append('use').attr('xlink:href', '#iD-logo-reset');
+           reset.append('div').html(_t.html('restore.reset'));
+           restore.node().focus();
+         };
+       }

 
 

-           chapter.restart = function() {
-               chapter.exit();
-               chapter.enter();
-           };
+       function uiScale(context) {
+         var projection = context.projection,
+             isImperial = !_mainLocalizer.usesMetric(),
+             maxLength = 180,
+             tickHeight = 8;
+
+         function scaleDefs(loc1, loc2) {
+           var lat = (loc2[1] + loc1[1]) / 2,
+               conversion = isImperial ? 3.28084 : 1,
+               dist = geoLonToMeters(loc2[0] - loc1[0], lat) * conversion,
+               scale = {
+             dist: 0,
+             px: 0,
+             text: ''
+           },
+               buckets,
+               i,
+               val,
+               dLon;

 
 

+           if (isImperial) {
+             buckets = [5280000, 528000, 52800, 5280, 500, 50, 5, 1];
+           } else {
+             buckets = [5000000, 500000, 50000, 5000, 500, 50, 5, 1];
+           } // determine a user-friendly endpoint for the scale

 
 

-           return utilRebind(chapter, dispatch$1, 'on');
-       }

 
 

-       function uiIntroStartEditing(context, reveal) {
-           var dispatch$1 = dispatch('done', 'startEditing');
-           var modalSelection = select(null);
+           for (i = 0; i < buckets.length; i++) {
+             val = buckets[i];

 
 

+             if (dist >= val) {
+               scale.dist = Math.floor(dist / val) * val;
+               break;
+             } else {
+               scale.dist = +dist.toFixed(2);
+             }
+           }

 
 

-           var chapter = {
-               title: 'intro.startediting.title'
-           };
+           dLon = geoMetersToLon(scale.dist / conversion, lat);
+           scale.px = Math.round(projection([loc1[0] + dLon, loc1[1]])[0]);
+           scale.text = displayLength(scale.dist / conversion, isImperial);
+           return scale;
+         }

 
 

-           function showHelp() {
-               reveal('.map-control.help-control',
-                   helpString('intro.startediting.help'), {
-                       buttonText: _t('intro.ok'),
-                       buttonCallback: function() { shortcuts(); }
-                   }
-               );
-           }
+         function update(selection) {
+           // choose loc1, loc2 along bottom of viewport (near where the scale will be drawn)
+           var dims = context.map().dimensions(),
+               loc1 = projection.invert([0, dims[1]]),
+               loc2 = projection.invert([maxLength, dims[1]]),
+               scale = scaleDefs(loc1, loc2);
+           selection.select('.scale-path').attr('d', 'M0.5,0.5v' + tickHeight + 'h' + scale.px + 'v-' + tickHeight);
+           selection.select('.scale-text').style(_mainLocalizer.textDirection() === 'ltr' ? 'left' : 'right', scale.px + 16 + 'px').html(scale.text);
+         }

 
 

-           function shortcuts() {
-               reveal('.map-control.help-control',
-                   helpString('intro.startediting.shortcuts'), {
-                       buttonText: _t('intro.ok'),
-                       buttonCallback: function() { showSave(); }
-                   }
-               );
+         return function (selection) {
+           function switchUnits() {
+             isImperial = !isImperial;
+             selection.call(update);

            }
 
            }
 

-           function showSave() {
-               context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
-               reveal('.top-toolbar button.save',
-                   helpString('intro.startediting.save'), {
-                       buttonText: _t('intro.ok'),
-                       buttonCallback: function() { showStart(); }
-                   }
-               );
-           }
+           var scalegroup = selection.append('svg').attr('class', 'scale').on('click', switchUnits).append('g').attr('transform', 'translate(10,11)');
+           scalegroup.append('path').attr('class', 'scale-path');
+           selection.append('div').attr('class', 'scale-text');
+           selection.call(update);
+           context.map().on('move.scale', function () {
+             update(selection);
+           });
+         };
+       }

 
 

-           function showStart() {
-               context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
+       function uiShortcuts(context) {
+         var detected = utilDetect();
+         var _activeTab = 0;

 
 

-               modalSelection = uiModal(context.container());
+         var _modalSelection;

 
 

-               modalSelection.select('.modal')
-                   .attr('class', 'modal-splash modal');
+         var _selection = select(null);

 
 

-               modalSelection.selectAll('.close').remove();
+         var _dataShortcuts;

 
 

-               var startbutton = modalSelection.select('.content')
-                   .attr('class', 'fillL')
-                   .append('button')
-                       .attr('class', 'modal-section huge-modal-button')
-                       .on('click', function() {
-                           modalSelection.remove();
-                       });
+         function shortcutsModal(_modalSelection) {
+           _modalSelection.select('.modal').classed('modal-shortcuts', true);

 
 

-                   startbutton
-                       .append('svg')
-                       .attr('class', 'illustration')
-                       .append('use')
-                       .attr('xlink:href', '#iD-logo-walkthrough');
+           var content = _modalSelection.select('.content');

 
 

-                   startbutton
-                       .append('h2')
-                       .text(_t('intro.startediting.start'));
+           content.append('div').attr('class', 'modal-section').append('h3').html(_t.html('shortcuts.title'));
+           _mainFileFetcher.get('shortcuts').then(function (data) {
+             _dataShortcuts = data;
+             content.call(render);
+           })["catch"](function () {
+             /* ignore */
+           });
+         }

 
 

-               dispatch$1.call('startEditing');
-           }
+         function render(selection) {
+           if (!_dataShortcuts) return;
+           var wrapper = selection.selectAll('.wrapper').data([0]);
+           var wrapperEnter = wrapper.enter().append('div').attr('class', 'wrapper modal-section');
+           var tabsBar = wrapperEnter.append('div').attr('class', 'tabs-bar');
+           var shortcutsList = wrapperEnter.append('div').attr('class', 'shortcuts-list');
+           wrapper = wrapper.merge(wrapperEnter);
+           var tabs = tabsBar.selectAll('.tab').data(_dataShortcuts);
+           var tabsEnter = tabs.enter().append('a').attr('class', 'tab').attr('href', '#').on('click', function (d3_event, d) {
+             d3_event.preventDefault();

 
 

+             var i = _dataShortcuts.indexOf(d);

 
 

-           chapter.enter = function() {
-               showHelp();
-           };
+             _activeTab = i;
+             render(selection);
+           });
+           tabsEnter.append('span').html(function (d) {
+             return _t.html(d.text);
+           }); // Update

 
 

+           wrapper.selectAll('.tab').classed('active', function (d, i) {
+             return i === _activeTab;
+           });
+           var shortcuts = shortcutsList.selectAll('.shortcut-tab').data(_dataShortcuts);
+           var shortcutsEnter = shortcuts.enter().append('div').attr('class', function (d) {
+             return 'shortcut-tab shortcut-tab-' + d.tab;
+           });
+           var columnsEnter = shortcutsEnter.selectAll('.shortcut-column').data(function (d) {
+             return d.columns;
+           }).enter().append('table').attr('class', 'shortcut-column');
+           var rowsEnter = columnsEnter.selectAll('.shortcut-row').data(function (d) {
+             return d.rows;
+           }).enter().append('tr').attr('class', 'shortcut-row');
+           var sectionRows = rowsEnter.filter(function (d) {
+             return !d.shortcuts;
+           });
+           sectionRows.append('td');
+           sectionRows.append('td').attr('class', 'shortcut-section').append('h3').html(function (d) {
+             return _t.html(d.text);
+           });
+           var shortcutRows = rowsEnter.filter(function (d) {
+             return d.shortcuts;
+           });
+           var shortcutKeys = shortcutRows.append('td').attr('class', 'shortcut-keys');
+           var modifierKeys = shortcutKeys.filter(function (d) {
+             return d.modifiers;
+           });
+           modifierKeys.selectAll('kbd.modifier').data(function (d) {
+             if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
+               return ['⌘'];
+             } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
+               return [];
+             } else {
+               return d.modifiers;
+             }
+           }).enter().each(function () {
+             var selection = select(this);
+             selection.append('kbd').attr('class', 'modifier').html(function (d) {
+               return uiCmd.display(d);
+             });
+             selection.append('span').html('+');
+           });
+           shortcutKeys.selectAll('kbd.shortcut').data(function (d) {
+             var arr = d.shortcuts;

 
 

-           chapter.exit = function() {
-               modalSelection.remove();
-               context.container().selectAll('.shaded').remove();  // in case user opened keyboard shortcuts
-           };
+             if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
+               arr = ['Y'];
+             } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
+               arr = ['F11'];
+             } // replace translations

 
 
 
 

-           return utilRebind(chapter, dispatch$1, 'on');
-       }
+             arr = arr.map(function (s) {
+               return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
+             });
+             return utilArrayUniq(arr).map(function (s) {
+               return {
+                 shortcut: s,
+                 separator: d.separator,
+                 suffix: d.suffix
+               };
+             });
+           }).enter().each(function (d, i, nodes) {
+             var selection = select(this);
+             var click = d.shortcut.toLowerCase().match(/(.*).click/);
+
+             if (click && click[1]) {
+               // replace "left_click", "right_click" with mouse icon
+               selection.call(svgIcon('#iD-walkthrough-mouse-' + click[1], 'operation'));
+             } else if (d.shortcut.toLowerCase() === 'long-press') {
+               selection.call(svgIcon('#iD-walkthrough-longpress', 'longpress operation'));
+             } else if (d.shortcut.toLowerCase() === 'tap') {
+               selection.call(svgIcon('#iD-walkthrough-tap', 'tap operation'));
+             } else {
+               selection.append('kbd').attr('class', 'shortcut').html(function (d) {
+                 return d.shortcut;
+               });
+             }

 
 

-       var chapterUi = {
-         welcome: uiIntroWelcome,
-         navigation: uiIntroNavigation,
-         point: uiIntroPoint,
-         area: uiIntroArea,
-         line: uiIntroLine,
-         building: uiIntroBuilding,
-         startEditing: uiIntroStartEditing
-       };
+             if (i < nodes.length - 1) {
+               selection.append('span').html(d.separator || "\xA0" + _t.html('shortcuts.or') + "\xA0");
+             } else if (i === nodes.length - 1 && d.suffix) {
+               selection.append('span').html(d.suffix);
+             }
+           });
+           shortcutKeys.filter(function (d) {
+             return d.gesture;
+           }).each(function () {
+             var selection = select(this);
+             selection.append('span').html('+');
+             selection.append('span').attr('class', 'gesture').html(function (d) {
+               return _t.html(d.gesture);
+             });
+           });
+           shortcutRows.append('td').attr('class', 'shortcut-desc').html(function (d) {
+             return d.text ? _t.html(d.text) : "\xA0";
+           }); // Update

 
 

-       var chapterFlow = [
-         'welcome',
-         'navigation',
-         'point',
-         'area',
-         'line',
-         'building',
-         'startEditing'
-       ];
+           wrapper.selectAll('.shortcut-tab').style('display', function (d, i) {
+             return i === _activeTab ? 'flex' : 'none';
+           });
+         }

 
 

+         return function (selection, show) {
+           _selection = selection;

 
 

-       function uiIntro(context) {
-         var INTRO_IMAGERY = 'EsriWorldImageryClarity';
-         var _introGraph = {};
-         var _currChapter;
+           if (show) {
+             _modalSelection = uiModal(selection);

 
 

+             _modalSelection.call(shortcutsModal);
+           } else {
+             context.keybinding().on([_t('shortcuts.toggle.key'), '?'], function () {
+               if (context.container().selectAll('.modal-shortcuts').size()) {
+                 // already showing
+                 if (_modalSelection) {
+                   _modalSelection.close();

 
 

-         function intro(selection) {
-           _mainFileFetcher.get('intro_graph')
-             .then(function (dataIntroGraph) {
-               // create entities for intro graph and localize names
-               for (var id in dataIntroGraph) {
-                 if (!_introGraph[id]) {
-                   _introGraph[id] = osmEntity(localize(dataIntroGraph[id]));
+                   _modalSelection = null;

                  }
                  }

+               } else {
+                 _modalSelection = uiModal(_selection);
+
+                 _modalSelection.call(shortcutsModal);

                }
                }

-               selection.call(startIntro);
-             })
-             .catch(function() { /* ignore */ });
+             });
+           }
+         };
+       }
+
+       function uiDataHeader() {
+         var _datum;
+
+         function dataHeader(selection) {
+           var header = selection.selectAll('.data-header').data(_datum ? [_datum] : [], function (d) {
+             return d.__featurehash__;
+           });
+           header.exit().remove();
+           var headerEnter = header.enter().append('div').attr('class', 'data-header');
+           var iconEnter = headerEnter.append('div').attr('class', 'data-header-icon');
+           iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-data', 'note-fill'));
+           headerEnter.append('div').attr('class', 'data-header-label').html(_t.html('map_data.layers.custom.title'));

          }
 
          }
 

+         dataHeader.datum = function (val) {
+           if (!arguments.length) return _datum;
+           _datum = val;
+           return this;
+         };

 
 

-         function startIntro(selection) {
-           context.enter(modeBrowse(context));
+         return dataHeader;
+       }

 
 

-           // Save current map state
-           var osm = context.connection();
-           var history = context.history().toJSON();
-           var hash = window.location.hash;
-           var center = context.map().center();
-           var zoom = context.map().zoom();
-           var background = context.background().baseLayerSource();
-           var overlays = context.background().overlayLayerSources();
-           var opacity = context.container().selectAll('.main-map .layer-background').style('opacity');
-           var caches = osm && osm.caches();
-           var baseEntities = context.history().graph().base().entities;
+       // It is keyed on the `value` of the entry. Data should be an array of objects like:
+       //   [{
+       //       value:   'string value',  // required
+       //       display: 'label html'     // optional
+       //       title:   'hover text'     // optional
+       //       terms:   ['search terms'] // optional
+       //   }, ...]

 
 

-           // Show sidebar and disable the sidebar resizing button
-           // (this needs to be before `context.inIntro(true)`)
-           context.ui().sidebar.expand();
-           context.container().selectAll('button.sidebar-toggle').classed('disabled', true);
+       var _comboHideTimerID;

 
 

-           // Block saving
-           context.inIntro(true);
+       function uiCombobox(context, klass) {
+         var dispatch = dispatch$8('accept', 'cancel');
+         var container = context.container();
+         var _suggestions = [];
+         var _data = [];
+         var _fetched = {};
+         var _selected = null;
+         var _canAutocomplete = true;
+         var _caseSensitive = false;
+         var _cancelFetch = false;
+         var _minItems = 2;
+         var _tDown = 0;
+
+         var _mouseEnterHandler, _mouseLeaveHandler;
+
+         var _fetcher = function _fetcher(val, cb) {
+           cb(_data.filter(function (d) {
+             var terms = d.terms || [];
+             terms.push(d.value);
+             return terms.some(function (term) {
+               return term.toString().toLowerCase().indexOf(val.toLowerCase()) !== -1;
+             });
+           }));
+         };

 
 

-           // Load semi-real data used in intro
-           if (osm) { osm.toggle(false).reset(); }
-           context.history().reset();
-           context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
-           context.history().checkpoint('initial');
+         var combobox = function combobox(input, attachTo) {
+           if (!input || input.empty()) return;
+           input.classed('combobox-input', true).on('focus.combo-input', focus).on('blur.combo-input', blur).on('keydown.combo-input', keydown).on('keyup.combo-input', keyup).on('input.combo-input', change).on('mousedown.combo-input', mousedown).each(function () {
+             var parent = this.parentNode;
+             var sibling = this.nextSibling;
+             select(parent).selectAll('.combobox-caret').filter(function (d) {
+               return d === input.node();
+             }).data([input.node()]).enter().insert('div', function () {
+               return sibling;
+             }).attr('class', 'combobox-caret').on('mousedown.combo-caret', function (d3_event) {
+               d3_event.preventDefault(); // don't steal focus from input

 
 

-           // Setup imagery
-           var imagery = context.background().findSource(INTRO_IMAGERY);
-           if (imagery) {
-             context.background().baseLayerSource(imagery);
-           } else {
-             context.background().bing();
-           }
-           overlays.forEach(function (d) { return context.background().toggleOverlayLayer(d); });
+               input.node().focus(); // focus the input as if it was clicked

 
 

-           // Setup data layers (only OSM)
-           var layers = context.layers();
-           layers.all().forEach(function (item) {
-             // if the layer has the function `enabled`
-             if (typeof item.layer.enabled === 'function') {
-               item.layer.enabled(item.id === 'osm');
-             }
+               mousedown(d3_event);
+             }).on('mouseup.combo-caret', function (d3_event) {
+               d3_event.preventDefault(); // don't steal focus from input
+
+               mouseup(d3_event);
+             });

            });
 
            });
 

+           function mousedown(d3_event) {
+             if (d3_event.button !== 0) return; // left click only

 
 

-           context.container().selectAll('.main-map .layer-background').style('opacity', 1);
+             _tDown = +new Date(); // clear selection

 
 

-           var curtain = uiCurtain(context.container().node());
-           selection.call(curtain);
+             var start = input.property('selectionStart');
+             var end = input.property('selectionEnd');

 
 

-           // Store that the user started the walkthrough..
-           corePreferences('walkthrough_started', 'yes');
+             if (start !== end) {
+               var val = utilGetSetValue(input);
+               input.node().setSelectionRange(val.length, val.length);
+               return;
+             }

 
 

-           // Restore previous walkthrough progress..
-           var storedProgress = corePreferences('walkthrough_progress') || '';
-           var progress = storedProgress.split(';').filter(Boolean);
+             input.on('mouseup.combo-input', mouseup);
+           }

 
 

-           var chapters = chapterFlow.map(function (chapter, i) {
-             var s = chapterUi[chapter](context, curtain.reveal)
-               .on('done', function () {
+           function mouseup(d3_event) {
+             input.on('mouseup.combo-input', null);
+             if (d3_event.button !== 0) return; // left click only

 
 

-                 buttons
-                   .filter(function (d) { return d.title === s.title; })
-                   .classed('finished', true);
+             if (input.node() !== document.activeElement) return; // exit if this input is not focused

 
 

-                 if (i < chapterFlow.length - 1) {
-                   var next = chapterFlow[i + 1];
-                   context.container().select(("button.chapter-" + next))
-                     .classed('next', true);
-                 }
+             var start = input.property('selectionStart');
+             var end = input.property('selectionEnd');
+             if (start !== end) return; // exit if user is selecting
+             // not showing or showing for a different field - try to show it.

 
 

-                 // Store walkthrough progress..
-                 progress.push(chapter);
-                 corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
-               });
-             return s;
-           });
+             var combo = container.selectAll('.combobox');

 
 

-           chapters[chapters.length - 1].on('startEditing', function () {
-             // Store walkthrough progress..
-             progress.push('startEditing');
-             corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
+             if (combo.empty() || combo.datum() !== input.node()) {
+               var tOrig = _tDown;
+               window.setTimeout(function () {
+                 if (tOrig !== _tDown) return; // exit if user double clicked

 
 

-             // Store if walkthrough is completed..
-             var incomplete = utilArrayDifference(chapterFlow, progress);
-             if (!incomplete.length) {
-               corePreferences('walkthrough_completed', 'yes');
+                 fetchComboData('', function () {
+                   show();
+                   render();
+                 });
+               }, 250);
+             } else {
+               hide();

              }
              }

+           }

 
 

-             curtain.remove();
-             navwrap.remove();
-             context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
-             context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
-             if (osm) { osm.toggle(true).reset().caches(caches); }
-             context.history().reset().merge(Object.values(baseEntities));
-             context.background().baseLayerSource(background);
-             overlays.forEach(function (d) { return context.background().toggleOverlayLayer(d); });
-             if (history) { context.history().fromJSON(history, false); }
-             context.map().centerZoom(center, zoom);
-             window.location.replace(hash);
-             context.inIntro(false);
-           });
+           function focus() {
+             fetchComboData(''); // prefetch values (may warm taginfo cache)
+           }

 
 

-           var navwrap = selection
-             .append('div')
-             .attr('class', 'intro-nav-wrap fillD');
+           function blur() {
+             _comboHideTimerID = window.setTimeout(hide, 75);
+           }

 
 

-           navwrap
-             .append('svg')
-             .attr('class', 'intro-nav-wrap-logo')
-             .append('use')
-             .attr('xlink:href', '#iD-logo-walkthrough');
+           function show() {
+             hide(); // remove any existing

 
 

-           var buttonwrap = navwrap
-             .append('div')
-             .attr('class', 'joined')
-             .selectAll('button.chapter');
+             container.insert('div', ':first-child').datum(input.node()).attr('class', 'combobox' + (klass ? ' combobox-' + klass : '')).style('position', 'absolute').style('display', 'block').style('left', '0px').on('mousedown.combo-container', function (d3_event) {
+               // prevent moving focus out of the input field
+               d3_event.preventDefault();
+             });
+             container.on('scroll.combo-scroll', render, true);
+           }

 
 

-           var buttons = buttonwrap
-             .data(chapters)
-             .enter()
-             .append('button')
-             .attr('class', function (d, i) { return ("chapter chapter-" + (chapterFlow[i])); })
-             .on('click', enterChapter);
+           function hide() {
+             if (_comboHideTimerID) {
+               window.clearTimeout(_comboHideTimerID);
+               _comboHideTimerID = undefined;
+             }

 
 

-           buttons
-             .append('span')
-             .text(function (d) { return _t(d.title); });
+             container.selectAll('.combobox').remove();
+             container.on('scroll.combo-scroll', null);
+           }

 
 

-           buttons
-             .append('span')
-             .attr('class', 'status')
-             .call(svgIcon((_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'));
+           function keydown(d3_event) {
+             var shown = !container.selectAll('.combobox').empty();
+             var tagName = input.node() ? input.node().tagName.toLowerCase() : '';

 
 

-           enterChapter(chapters[0]);
+             switch (d3_event.keyCode) {
+               case 8: // ⌫ Backspace

 
 

+               case 46:
+                 // ⌦ Delete
+                 d3_event.stopPropagation();
+                 _selected = null;
+                 render();
+                 input.on('input.combo-input', function () {
+                   var start = input.property('selectionStart');
+                   input.node().setSelectionRange(start, start);
+                   input.on('input.combo-input', change);
+                 });
+                 break;

 
 

-           function enterChapter(newChapter) {
-             if (_currChapter) { _currChapter.exit(); }
-             context.enter(modeBrowse(context));
+               case 9:
+                 // ⇥ Tab
+                 accept();
+                 break;

 
 

-             _currChapter = newChapter;
-             _currChapter.enter();
+               case 13:
+                 // ↩ Return
+                 d3_event.preventDefault();
+                 d3_event.stopPropagation();
+                 break;

 
 

-             buttons
-               .classed('next', false)
-               .classed('active', function (d) { return d.title === _currChapter.title; });
-           }
-         }
+               case 38:
+                 // ↑ Up arrow
+                 if (tagName === 'textarea' && !shown) return;
+                 d3_event.preventDefault();

 
 

+                 if (tagName === 'input' && !shown) {
+                   show();
+                 }

 
 

-         return intro;
-       }
+                 nav(-1);
+                 break;

 
 

-       function uiIssuesInfo(context) {
+               case 40:
+                 // ↓ Down arrow
+                 if (tagName === 'textarea' && !shown) return;
+                 d3_event.preventDefault();

 
 

-           var warningsItem = {
-               id: 'warnings',
-               count: 0,
-               iconID: 'iD-icon-alert',
-               descriptionID: 'issues.warnings_and_errors'
-           };
+                 if (tagName === 'input' && !shown) {
+                   show();
+                 }

 
 

-           var resolvedItem = {
-               id: 'resolved',
-               count: 0,
-               iconID: 'iD-icon-apply',
-               descriptionID: 'issues.user_resolved_issues'
-           };
+                 nav(+1);
+                 break;
+             }
+           }

 
 

-           function update(selection) {
+           function keyup(d3_event) {
+             switch (d3_event.keyCode) {
+               case 27:
+                 // ⎋ Escape
+                 cancel();
+                 break;

 
 

-               var shownItems = [];
+               case 13:
+                 // ↩ Return
+                 accept();
+                 break;
+             }
+           } // Called whenever the input value is changed (e.g. on typing)

 
 

-               var liveIssues = context.validator().getIssues({
-                   what: corePreferences('validate-what') || 'edited',
-                   where: corePreferences('validate-where') || 'all'
-               });
-               if (liveIssues.length) {
-                   warningsItem.count = liveIssues.length;
-                   shownItems.push(warningsItem);
-               }

 
 

-               if (corePreferences('validate-what') === 'all') {
-                   var resolvedIssues = context.validator().getResolvedIssues();
-                   if (resolvedIssues.length) {
-                       resolvedItem.count = resolvedIssues.length;
-                       shownItems.push(resolvedItem);
-                   }
-               }
+           function change() {
+             fetchComboData(value(), function () {
+               _selected = null;
+               var val = input.property('value');

 
 

-               var chips = selection.selectAll('.chip')
-                   .data(shownItems, function(d) {
-                       return d.id;
-                   });
+               if (_suggestions.length) {
+                 if (input.property('selectionEnd') === val.length) {
+                   _selected = tryAutocomplete();
+                 }

 
 

-               chips.exit().remove();
+                 if (!_selected) {
+                   _selected = val;
+                 }
+               }

 
 

-               var enter = chips.enter()
-                   .append('a')
-                   .attr('class', function(d) {
-                       return 'chip ' + d.id + '-count';
-                   })
-                   .attr('href', '#')
-                   .attr('tabindex', -1)
-                   .each(function(d) {
+               if (val.length) {
+                 var combo = container.selectAll('.combobox');

 
 

-                       var chipSelection = select(this);
+                 if (combo.empty()) {
+                   show();
+                 }
+               } else {
+                 hide();
+               }

 
 

-                       var tooltipBehavior = uiTooltip()
-                           .placement('top')
-                           .title(_t(d.descriptionID));
+               render();
+             });
+           } // Called when the user presses up/down arrows to navigate the list

 
 

-                       chipSelection
-                           .call(tooltipBehavior)
-                           .on('click', function() {
-                               event.preventDefault();

 
 

-                               tooltipBehavior.hide(select(this));
-                               // open the Issues pane
-                               context.ui().togglePanes(context.container().select('.map-panes .issues-pane'));
-                           });
+           function nav(dir) {
+             if (_suggestions.length) {
+               // try to determine previously selected index..
+               var index = -1;

 
 

-                       chipSelection.call(svgIcon('#' + d.iconID));
+               for (var i = 0; i < _suggestions.length; i++) {
+                 if (_selected && _suggestions[i].value === _selected) {
+                   index = i;
+                   break;
+                 }
+               } // pick new _selected

 
 

-                   });

 
 

-               enter.append('span')
-                   .attr('class', 'count');
+               index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
+               _selected = _suggestions[index].value;
+               input.property('value', _selected);
+             }

 
 

-               enter.merge(chips)
-                   .selectAll('span.count')
-                   .text(function(d) {
-                       return d.count.toString();
-                   });
+             render();
+             ensureVisible();

            }
 
            }
 

+           function ensureVisible() {
+             var combo = container.selectAll('.combobox');
+             if (combo.empty()) return;
+             var containerRect = container.node().getBoundingClientRect();
+             var comboRect = combo.node().getBoundingClientRect();

 
 

-           return function(selection) {
-               update(selection);
-
-               context.validator().on('validated.infobox', function() {
-                   update(selection);
+             if (comboRect.bottom > containerRect.bottom) {
+               var node = attachTo ? attachTo.node() : input.node();
+               node.scrollIntoView({
+                 behavior: 'instant',
+                 block: 'center'

                });
                });

-           };
-       }
-
-       // import { utilGetDimensions } from '../util/dimensions';
-
+               render();
+             } // https://stackoverflow.com/questions/11039885/scrollintoview-causing-the-whole-page-to-move

 
 

-       function uiMapInMap(context) {

 
 

-           function mapInMap(selection) {
-               var backgroundLayer = rendererTileLayer(context);
-               var overlayLayers = {};
-               var projection = geoRawMercator();
-               var dataLayer = svgData(projection, context).showLabels(false);
-               var debugLayer = svgDebug(projection, context);
-               var zoom = d3_zoom()
-                   .scaleExtent([geoZoomToScale(0.5), geoZoomToScale(24)])
-                   .on('start', zoomStarted)
-                   .on('zoom', zoomed)
-                   .on('end', zoomEnded);
-
-               var wrap = select(null);
-               var tiles = select(null);
-               var viewport = select(null);
-
-               var _isTransformed = false;
-               var _isHidden = true;
-               var _skipEvents = false;
-               var _gesture = null;
-               var _zDiff = 6;    // by default, minimap renders at (main zoom - 6)
-               var _dMini;        // dimensions of minimap
-               var _cMini;        // center pixel of minimap
-               var _tStart;       // transform at start of gesture
-               var _tCurr;        // transform at most recent event
-               var _timeoutID;
-
-
-               function zoomStarted() {
-                   if (_skipEvents) { return; }
-                   _tStart = _tCurr = projection.transform();
-                   _gesture = null;
-               }
-
-
-               function zoomed() {
-                   if (_skipEvents) { return; }
-
-                   var x = event.transform.x;
-                   var y = event.transform.y;
-                   var k = event.transform.k;
-                   var isZooming = (k !== _tStart.k);
-                   var isPanning = (x !== _tStart.x || y !== _tStart.y);
-
-                   if (!isZooming && !isPanning) {
-                       return;  // no change
-                   }
+             var selected = combo.selectAll('.combobox-option.selected').node();

 
 

-                   // lock in either zooming or panning, don't allow both in minimap.
-                   if (!_gesture) {
-                       _gesture = isZooming ? 'zoom' : 'pan';
-                   }
+             if (selected) {
+               selected.scrollIntoView({
+                 behavior: 'smooth',
+                 block: 'nearest'
+               });
+             }
+           }

 
 

-                   var tMini = projection.transform();
-                   var tX, tY, scale;
+           function value() {
+             var value = input.property('value');
+             var start = input.property('selectionStart');
+             var end = input.property('selectionEnd');

 
 

-                   if (_gesture === 'zoom') {
-                       scale = k / tMini.k;
-                       tX = (_cMini[0] / scale - _cMini[0]) * scale;
-                       tY = (_cMini[1] / scale - _cMini[1]) * scale;
-                   } else {
-                       k = tMini.k;
-                       scale = 1;
-                       tX = x - tMini.x;
-                       tY = y - tMini.y;
-                   }
+             if (start && end) {
+               value = value.substring(0, start);
+             }

 
 

-                   utilSetTransform(tiles, tX, tY, scale);
-                   utilSetTransform(viewport, 0, 0, scale);
-                   _isTransformed = true;
-                   _tCurr = identity$2.translate(x, y).scale(k);
+             return value;
+           }

 
 

-                   var zMain = geoScaleToZoom(context.projection.scale());
-                   var zMini = geoScaleToZoom(k);
+           function fetchComboData(v, cb) {
+             _cancelFetch = false;

 
 

-                   _zDiff = zMain - zMini;
+             _fetcher.call(input, v, function (results) {
+               // already chose a value, don't overwrite or autocomplete it
+               if (_cancelFetch) return;
+               _suggestions = results;
+               results.forEach(function (d) {
+                 _fetched[d.value] = d;
+               });

 
 

-                   queueRedraw();
+               if (cb) {
+                 cb();

                }
                }

+             });
+           }

 
 

+           function tryAutocomplete() {
+             if (!_canAutocomplete) return;
+             var val = _caseSensitive ? value() : value().toLowerCase();
+             if (!val) return; // Don't autocomplete if user is typing a number - #4935

 
 

-               function zoomEnded() {
-                   if (_skipEvents) { return; }
-                   if (_gesture !== 'pan') { return; }
-
-                   updateProjection();
-                   _gesture = null;
-                   context.map().center(projection.invert(_cMini));   // recenter main map..
-               }
+             if (!isNaN(parseFloat(val)) && isFinite(val)) return;
+             var bestIndex = -1;

 
 

+             for (var i = 0; i < _suggestions.length; i++) {
+               var suggestion = _suggestions[i].value;
+               var compare = _caseSensitive ? suggestion : suggestion.toLowerCase(); // if search string matches suggestion exactly, pick it..

 
 

-               function updateProjection() {
-                   var loc = context.map().center();
-                   var tMain = context.projection.transform();
-                   var zMain = geoScaleToZoom(tMain.k);
-                   var zMini = Math.max(zMain - _zDiff, 0.5);
-                   var kMini = geoZoomToScale(zMini);
+               if (compare === val) {
+                 bestIndex = i;
+                 break; // otherwise lock in the first result that starts with the search string..
+               } else if (bestIndex === -1 && compare.indexOf(val) === 0) {
+                 bestIndex = i;
+               }
+             }

 
 

-                   projection
-                       .translate([tMain.x, tMain.y])
-                       .scale(kMini);
+             if (bestIndex !== -1) {
+               var bestVal = _suggestions[bestIndex].value;
+               input.property('value', bestVal);
+               input.node().setSelectionRange(val.length, bestVal.length);
+               return bestVal;
+             }
+           }

 
 

-                   var point = projection(loc);
-                   var mouse = (_gesture === 'pan') ? geoVecSubtract([_tCurr.x, _tCurr.y], [_tStart.x, _tStart.y]) : [0, 0];
-                   var xMini = _cMini[0] - point[0] + tMain.x + mouse[0];
-                   var yMini = _cMini[1] - point[1] + tMain.y + mouse[1];
+           function render() {
+             if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
+               hide();
+               return;
+             }

 
 

-                   projection
-                       .translate([xMini, yMini])
-                       .clipExtent([[0, 0], _dMini]);
+             var shown = !container.selectAll('.combobox').empty();
+             if (!shown) return;
+             var combo = container.selectAll('.combobox');
+             var options = combo.selectAll('.combobox-option').data(_suggestions, function (d) {
+               return d.value;
+             });
+             options.exit().remove(); // enter/update
+
+             options.enter().append('a').attr('class', function (d) {
+               return 'combobox-option ' + (d.klass || '');
+             }).attr('title', function (d) {
+               return d.title;
+             }).html(function (d) {
+               return d.display || d.value;
+             }).on('mouseenter', _mouseEnterHandler).on('mouseleave', _mouseLeaveHandler).merge(options).classed('selected', function (d) {
+               return d.value === _selected;
+             }).on('click.combo-option', accept).order();
+             var node = attachTo ? attachTo.node() : input.node();
+             var containerRect = container.node().getBoundingClientRect();
+             var rect = node.getBoundingClientRect();
+             combo.style('left', rect.left + 5 - containerRect.left + 'px').style('width', rect.width - 10 + 'px').style('top', rect.height + rect.top - containerRect.top + 'px');
+           } // Dispatches an 'accept' event
+           // Then hides the combobox.
+
+
+           function accept(d3_event, d) {
+             _cancelFetch = true;
+             var thiz = input.node();
+
+             if (d) {
+               // user clicked on a suggestion
+               utilGetSetValue(input, d.value); // replace field contents
+
+               utilTriggerEvent(input, 'change');
+             } // clear (and keep) selection
+
+
+             var val = utilGetSetValue(input);
+             thiz.setSelectionRange(val.length, val.length);
+             d = _fetched[val];
+             dispatch.call('accept', thiz, d, val);
+             hide();
+           } // Dispatches an 'cancel' event
+           // Then hides the combobox.

 
 

-                   _tCurr = projection.transform();

 
 

-                   if (_isTransformed) {
-                       utilSetTransform(tiles, 0, 0);
-                       utilSetTransform(viewport, 0, 0);
-                       _isTransformed = false;
-                   }
+           function cancel() {
+             _cancelFetch = true;
+             var thiz = input.node(); // clear (and remove) selection, and replace field contents

 
 

-                   zoom
-                       .scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
+             var val = utilGetSetValue(input);
+             var start = input.property('selectionStart');
+             var end = input.property('selectionEnd');
+             val = val.slice(0, start) + val.slice(end);
+             utilGetSetValue(input, val);
+             thiz.setSelectionRange(val.length, val.length);
+             dispatch.call('cancel', thiz);
+             hide();
+           }
+         };

 
 

-                   _skipEvents = true;
-                   wrap.call(zoom.transform, _tCurr);
-                   _skipEvents = false;
-               }
+         combobox.canAutocomplete = function (val) {
+           if (!arguments.length) return _canAutocomplete;
+           _canAutocomplete = val;
+           return combobox;
+         };

 
 

+         combobox.caseSensitive = function (val) {
+           if (!arguments.length) return _caseSensitive;
+           _caseSensitive = val;
+           return combobox;
+         };

 
 

-               function redraw() {
-                   clearTimeout(_timeoutID);
-                   if (_isHidden) { return; }
+         combobox.data = function (val) {
+           if (!arguments.length) return _data;
+           _data = val;
+           return combobox;
+         };

 
 

-                   updateProjection();
-                   var zMini = geoScaleToZoom(projection.scale());
+         combobox.fetcher = function (val) {
+           if (!arguments.length) return _fetcher;
+           _fetcher = val;
+           return combobox;
+         };

 
 

-                   // setup tile container
-                   tiles = wrap
-                       .selectAll('.map-in-map-tiles')
-                       .data([0]);
+         combobox.minItems = function (val) {
+           if (!arguments.length) return _minItems;
+           _minItems = val;
+           return combobox;
+         };

 
 

-                   tiles = tiles.enter()
-                       .append('div')
-                       .attr('class', 'map-in-map-tiles')
-                       .merge(tiles);
+         combobox.itemsMouseEnter = function (val) {
+           if (!arguments.length) return _mouseEnterHandler;
+           _mouseEnterHandler = val;
+           return combobox;
+         };

 
 

-                   // redraw background
-                   backgroundLayer
-                       .source(context.background().baseLayerSource())
-                       .projection(projection)
-                       .dimensions(_dMini);
+         combobox.itemsMouseLeave = function (val) {
+           if (!arguments.length) return _mouseLeaveHandler;
+           _mouseLeaveHandler = val;
+           return combobox;
+         };

 
 

-                   var background = tiles
-                       .selectAll('.map-in-map-background')
-                       .data([0]);
+         return utilRebind(combobox, dispatch, 'on');
+       }

 
 

-                   background.enter()
-                       .append('div')
-                       .attr('class', 'map-in-map-background')
-                       .merge(background)
-                       .call(backgroundLayer);
+       uiCombobox.off = function (input, context) {
+         input.on('focus.combo-input', null).on('blur.combo-input', null).on('keydown.combo-input', null).on('keyup.combo-input', null).on('input.combo-input', null).on('mousedown.combo-input', null).on('mouseup.combo-input', null);
+         context.container().on('scroll.combo-scroll', null);
+       };

 
 

+       function uiDisclosure(context, key, expandedDefault) {
+         var dispatch = dispatch$8('toggled');

 
 

-                   // redraw overlay
-                   var overlaySources = context.background().overlayLayerSources();
-                   var activeOverlayLayers = [];
-                   for (var i = 0; i < overlaySources.length; i++) {
-                       if (overlaySources[i].validZoom(zMini)) {
-                           if (!overlayLayers[i]) { overlayLayers[i] = rendererTileLayer(context); }
-                           activeOverlayLayers.push(overlayLayers[i]
-                               .source(overlaySources[i])
-                               .projection(projection)
-                               .dimensions(_dMini));
-                       }
-                   }
+         var _expanded;

 
 

-                   var overlay = tiles
-                       .selectAll('.map-in-map-overlay')
-                       .data([0]);
+         var _label = utilFunctor('');

 
 

-                   overlay = overlay.enter()
-                       .append('div')
-                       .attr('class', 'map-in-map-overlay')
-                       .merge(overlay);
+         var _updatePreference = true;

 
 

+         var _content = function _content() {};

 
 

-                   var overlays = overlay
-                       .selectAll('div')
-                       .data(activeOverlayLayers, function(d) { return d.source().name(); });
+         var disclosure = function disclosure(selection) {
+           if (_expanded === undefined || _expanded === null) {
+             // loading _expanded here allows it to be reset by calling `disclosure.expanded(null)`
+             var preference = corePreferences('disclosure.' + key + '.expanded');
+             _expanded = preference === null ? !!expandedDefault : preference === 'true';
+           }

 
 

-                   overlays.exit()
-                       .remove();
+           var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter

 
 

-                   overlays = overlays.enter()
-                       .append('div')
-                       .merge(overlays)
-                       .each(function(layer) { select(this).call(layer); });
+           var hideToggleEnter = hideToggle.enter().append('a').attr('href', '#').attr('class', 'hide-toggle hide-toggle-' + key).call(svgIcon('', 'pre-text', 'hide-toggle-icon'));
+           hideToggleEnter.append('span').attr('class', 'hide-toggle-text'); // update

 
 

+           hideToggle = hideToggleEnter.merge(hideToggle);
+           hideToggle.on('click', toggle).classed('expanded', _expanded);
+           hideToggle.selectAll('.hide-toggle-text').html(_label());
+           hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
+           var wrap = selection.selectAll('.disclosure-wrap').data([0]); // enter/update

 
 

-                   var dataLayers = tiles
-                       .selectAll('.map-in-map-data')
-                       .data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);

 
 

-                   dataLayers.exit()
-                       .remove();
+           if (_expanded) {
+             wrap.call(_content);
+           }

 
 

-                   dataLayers = dataLayers.enter()
-                       .append('svg')
-                       .attr('class', 'map-in-map-data')
-                       .merge(dataLayers)
-                       .call(dataLayer)
-                       .call(debugLayer);
+           function toggle(d3_event) {
+             d3_event.preventDefault();
+             _expanded = !_expanded;

 
 

+             if (_updatePreference) {
+               corePreferences('disclosure.' + key + '.expanded', _expanded);
+             }

 
 

-                   // redraw viewport bounding box
-                   if (_gesture !== 'pan') {
-                       var getPath = d3_geoPath(projection);
-                       var bbox = { type: 'Polygon', coordinates: [context.map().extent().polygon()] };
+             hideToggle.classed('expanded', _expanded);
+             hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
+             wrap.call(uiToggle(_expanded));

 
 

-                       viewport = wrap.selectAll('.map-in-map-viewport')
-                           .data([0]);
+             if (_expanded) {
+               wrap.call(_content);
+             }

 
 

-                       viewport = viewport.enter()
-                           .append('svg')
-                           .attr('class', 'map-in-map-viewport')
-                           .merge(viewport);
+             dispatch.call('toggled', this, _expanded);
+           }
+         };

 
 

+         disclosure.label = function (val) {
+           if (!arguments.length) return _label;
+           _label = utilFunctor(val);
+           return disclosure;
+         };

 
 

-                       var path = viewport.selectAll('.map-in-map-bbox')
-                           .data([bbox]);
+         disclosure.expanded = function (val) {
+           if (!arguments.length) return _expanded;
+           _expanded = val;
+           return disclosure;
+         };

 
 

-                       path.enter()
-                           .append('path')
-                           .attr('class', 'map-in-map-bbox')
-                           .merge(path)
-                           .attr('d', getPath)
-                           .classed('thick', function(d) { return getPath.area(d) < 30; });
-                   }
-               }
+         disclosure.updatePreference = function (val) {
+           if (!arguments.length) return _updatePreference;
+           _updatePreference = val;
+           return disclosure;
+         };

 
 

+         disclosure.content = function (val) {
+           if (!arguments.length) return _content;
+           _content = val;
+           return disclosure;
+         };

 
 

-               function queueRedraw() {
-                   clearTimeout(_timeoutID);
-                   _timeoutID = setTimeout(function() { redraw(); }, 750);
-               }
+         return utilRebind(disclosure, dispatch, 'on');
+       }

 
 

+       // Can be labeled and collapsible.

 
 

-               function toggle() {
-                   if (event) { event.preventDefault(); }
+       function uiSection(id, context) {
+         var _classes = utilFunctor('');

 
 

-                   _isHidden = !_isHidden;
+         var _shouldDisplay;

 
 

-                   context.container().select('.minimap-toggle-item')
-                       .classed('active', !_isHidden)
-                       .select('input')
-                       .property('checked', !_isHidden);
+         var _content;

 
 

-                   if (_isHidden) {
-                       wrap
-                           .style('display', 'block')
-                           .style('opacity', '1')
-                           .transition()
-                           .duration(200)
-                           .style('opacity', '0')
-                           .on('end', function() {
-                               selection.selectAll('.map-in-map')
-                                   .style('display', 'none');
-                           });
-                   } else {
-                       wrap
-                           .style('display', 'block')
-                           .style('opacity', '0')
-                           .transition()
-                           .duration(200)
-                           .style('opacity', '1')
-                           .on('end', function() {
-                               redraw();
-                           });
-                   }
-               }
+         var _disclosure;

 
 

+         var _label;

 
 

-               uiMapInMap.toggle = toggle;
+         var _expandedByDefault = utilFunctor(true);

 
 

-               wrap = selection.selectAll('.map-in-map')
-                   .data([0]);
+         var _disclosureContent;

 
 

-               wrap = wrap.enter()
-                   .append('div')
-                   .attr('class', 'map-in-map')
-                   .style('display', (_isHidden ? 'none' : 'block'))
-                   .call(zoom)
-                   .on('dblclick.zoom', null)
-                   .merge(wrap);
-
-               // reflow warning: Hardcode dimensions - currently can't resize it anyway..
-               _dMini = [200,150]; //utilGetDimensions(wrap);
-               _cMini = geoVecScale(_dMini, 0.5);
-
-               context.map()
-                   .on('drawn.map-in-map', function(drawn) {
-                       if (drawn.full === true) {
-                           redraw();
-                       }
-                   });
+         var _disclosureExpanded;

 
 

-               redraw();
+         var _containerSelection = select(null);

 
 

-               context.keybinding()
-                   .on(_t('background.minimap.key'), toggle);
-           }
+         var section = {
+           id: id
+         };

 
 

-           return mapInMap;
-       }
+         section.classes = function (val) {
+           if (!arguments.length) return _classes;
+           _classes = utilFunctor(val);
+           return section;
+         };

 
 

-       function uiNotice(context) {
+         section.label = function (val) {
+           if (!arguments.length) return _label;
+           _label = utilFunctor(val);
+           return section;
+         };

 
 

-           return function(selection) {
-               var div = selection
-                   .append('div')
-                   .attr('class', 'notice');
-
-               var button = div
-                   .append('button')
-                   .attr('class', 'zoom-to notice fillD')
-                   .on('click', function() {
-                       context.map().zoomEase(context.minEditableZoom());
-                   })
-                   .on('wheel', function() {   // let wheel events pass through #4482
-                       var e2 = new WheelEvent(event.type, event);
-                       context.surface().node().dispatchEvent(e2);
-                   });
+         section.expandedByDefault = function (val) {
+           if (!arguments.length) return _expandedByDefault;
+           _expandedByDefault = utilFunctor(val);
+           return section;
+         };

 
 

-               button
-                   .call(svgIcon('#iD-icon-plus', 'pre-text'))
-                   .append('span')
-                   .attr('class', 'label')
-                   .text(_t('zoom_in_edit'));
+         section.shouldDisplay = function (val) {
+           if (!arguments.length) return _shouldDisplay;
+           _shouldDisplay = utilFunctor(val);
+           return section;
+         };

 
 

+         section.content = function (val) {
+           if (!arguments.length) return _content;
+           _content = val;
+           return section;
+         };

 
 

-               function disableTooHigh() {
-                   var canEdit = context.map().zoom() >= context.minEditableZoom();
-                   div.style('display', canEdit ? 'none' : 'block');
-               }
+         section.disclosureContent = function (val) {
+           if (!arguments.length) return _disclosureContent;
+           _disclosureContent = val;
+           return section;
+         };

 
 

-               context.map()
-                   .on('move.notice', debounce(disableTooHigh, 500));
+         section.disclosureExpanded = function (val) {
+           if (!arguments.length) return _disclosureExpanded;
+           _disclosureExpanded = val;
+           return section;
+         }; // may be called multiple times

 
 

-               disableTooHigh();
-           };
-       }

 
 

-       function uiPhotoviewer(context) {
+         section.render = function (selection) {
+           _containerSelection = selection.selectAll('.section-' + id).data([0]);

 
 

-           var dispatch$1 = dispatch('resize');
+           var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));

 
 

-           var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+           _containerSelection = sectionEnter.merge(_containerSelection);

 
 

-           function photoviewer(selection) {
-               selection
-                   .append('button')
-                   .attr('class', 'thumb-hide')
-                   .on('click', function () {
-                       if (services.streetside) { services.streetside.hideViewer(context); }
-                       if (services.mapillary) { services.mapillary.hideViewer(context); }
-                       if (services.openstreetcam) { services.openstreetcam.hideViewer(context); }
-                   })
-                   .append('div')
-                   .call(svgIcon('#iD-icon-close'));
-
-               function preventDefault() {
-                   event.preventDefault();
-               }
-
-               selection
-                   .append('button')
-                   .attr('class', 'resize-handle-xy')
-                   .on('touchstart touchdown touchend', preventDefault)
-                   .on(
-                       _pointerPrefix + 'down',
-                       buildResizeListener(selection, 'resize', dispatch$1, { resizeOnX: true, resizeOnY: true })
-                   );
-
-               selection
-                   .append('button')
-                   .attr('class', 'resize-handle-x')
-                   .on('touchstart touchdown touchend', preventDefault)
-                   .on(
-                       _pointerPrefix + 'down',
-                       buildResizeListener(selection, 'resize', dispatch$1, { resizeOnX: true })
-                   );
-
-               selection
-                   .append('button')
-                   .attr('class', 'resize-handle-y')
-                   .on('touchstart touchdown touchend', preventDefault)
-                   .on(
-                       _pointerPrefix + 'down',
-                       buildResizeListener(selection, 'resize', dispatch$1, { resizeOnY: true })
-                   );
-
-               services.streetside.loadViewer(context);
-               services.mapillary.loadViewer(context);
-               services.openstreetcam.loadViewer(context);
-
-               function buildResizeListener(target, eventName, dispatch, options) {
-
-                   var resizeOnX = !!options.resizeOnX;
-                   var resizeOnY = !!options.resizeOnY;
-                   var minHeight = options.minHeight || 240;
-                   var minWidth = options.minWidth || 320;
-                   var pointerId;
-                   var startX;
-                   var startY;
-                   var startWidth;
-                   var startHeight;
-
-                   function startResize() {
-                       if (pointerId !== (event.pointerId || 'mouse')) { return; }
-
-                       event.preventDefault();
-                       event.stopPropagation();
-
-                       var mapSize = context.map().dimensions();
-
-                       if (resizeOnX) {
-                           var maxWidth = mapSize[0];
-                           var newWidth = clamp((startWidth + event.clientX - startX), minWidth, maxWidth);
-                           target.style('width', newWidth + 'px');
-                       }
+           _containerSelection.call(renderContent);
+         };

 
 

-                       if (resizeOnY) {
-                           var maxHeight = mapSize[1] - 90;  // preserve space at top/bottom of map
-                           var newHeight = clamp((startHeight + startY - event.clientY), minHeight, maxHeight);
-                           target.style('height', newHeight + 'px');
-                       }
+         section.reRender = function () {
+           _containerSelection.call(renderContent);
+         };

 
 

-                       dispatch.call(eventName, target, utilGetDimensions(target, true));
-                   }
+         section.selection = function () {
+           return _containerSelection;
+         };

 
 

-                   function clamp(num, min, max) {
-                       return Math.max(min, Math.min(num, max));
-                   }
+         section.disclosure = function () {
+           return _disclosure;
+         }; // may be called multiple times

 
 

-                   function stopResize() {
-                       if (pointerId !== (event.pointerId || 'mouse')) { return; }

 
 

-                       event.preventDefault();
-                       event.stopPropagation();
+         function renderContent(selection) {
+           if (_shouldDisplay) {
+             var shouldDisplay = _shouldDisplay();

 
 

-                       // remove all the listeners we added
-                       select(window)
-                           .on('.' + eventName, null);
-                   }
+             selection.classed('hide', !shouldDisplay);

 
 

-                   return function initResize() {
-                       event.preventDefault();
-                       event.stopPropagation();
+             if (!shouldDisplay) {
+               selection.html('');
+               return;
+             }
+           }

 
 

-                       pointerId = event.pointerId || 'mouse';
+           if (_disclosureContent) {
+             if (!_disclosure) {
+               _disclosure = uiDisclosure(context, id.replace(/-/g, '_'), _expandedByDefault()).label(_label || '')
+               /*.on('toggled', function(expanded) {
+                   if (expanded) { selection.node().parentNode.scrollTop += 200; }
+               })*/
+               .content(_disclosureContent);
+             }

 
 

-                       startX = event.clientX;
-                       startY = event.clientY;
-                       var targetRect = target.node().getBoundingClientRect();
-                       startWidth = targetRect.width;
-                       startHeight = targetRect.height;
+             if (_disclosureExpanded !== undefined) {
+               _disclosure.expanded(_disclosureExpanded);

 
 

-                       select(window)
-                           .on(_pointerPrefix + 'move.' + eventName, startResize, false)
-                           .on(_pointerPrefix + 'up.' + eventName, stopResize, false);
+               _disclosureExpanded = undefined;
+             }

 
 

-                       if (_pointerPrefix === 'pointer') {
-                           select(window)
-                               .on('pointercancel.' + eventName, stopResize, false);
-                       }
-                   };
-               }
+             selection.call(_disclosure);
+             return;

            }
 
            }
 

-           photoviewer.onMapResize = function() {
-               var photoviewer = context.container().select('.photoviewer');
-               var content = context.container().select('.main-content');
-               var mapDimensions = utilGetDimensions(content, true);
-               // shrink photo viewer if it is too big
-               // (-90 preserves space at top and bottom of map used by menus)
-               var photoDimensions = utilGetDimensions(photoviewer, true);
-               if (photoDimensions[0] > mapDimensions[0] || photoDimensions[1] > (mapDimensions[1] - 90)) {
-                   var setPhotoDimensions = [
-                       Math.min(photoDimensions[0], mapDimensions[0]),
-                       Math.min(photoDimensions[1], mapDimensions[1] - 90) ];
-
-                   photoviewer
-                       .style('width', setPhotoDimensions[0] + 'px')
-                       .style('height', setPhotoDimensions[1] + 'px');
-
-                   dispatch$1.call('resize', photoviewer, setPhotoDimensions);
-               }
-           };
+           if (_content) {
+             selection.call(_content);
+           }
+         }

 
 

-           return utilRebind(photoviewer, dispatch$1, 'on');
+         return section;

        }
 
        }
 

-       function uiRestore(context) {
-         return function(selection) {
-           if (!context.history().hasRestorableChanges()) { return; }
-
-           var modalSelection = uiModal(selection, true);
-
-           modalSelection.select('.modal')
-             .attr('class', 'modal fillL');
+       // {
+       //   key: 'string',     // required
+       //   value: 'string'    // optional
+       // }
+       //   -or-
+       // {
+       //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+       // }
+       //

 
 

-           var introModal = modalSelection.select('.content');
+       function uiTagReference(what) {
+         var wikibase = what.qid ? services.wikidata : services.osmWikibase;
+         var tagReference = {};

 
 

-           introModal
-             .append('div')
-             .attr('class', 'modal-section')
-             .append('h3')
-             .text(_t('restore.heading'));
-
-           introModal
-             .append('div')
-             .attr('class','modal-section')
-             .append('p')
-             .text(_t('restore.description'));
-
-           var buttonWrap = introModal
-             .append('div')
-             .attr('class', 'modal-actions');
-
-           var restore = buttonWrap
-             .append('button')
-             .attr('class', 'restore')
-             .on('click', function () {
-               context.history().restore();
-               modalSelection.remove();
-             });
-
-           restore
-             .append('svg')
-             .attr('class', 'logo logo-restore')
-             .append('use')
-             .attr('xlink:href', '#iD-logo-restore');
-
-           restore
-             .append('div')
-             .text(_t('restore.restore'));
-
-           var reset = buttonWrap
-             .append('button')
-             .attr('class', 'reset')
-             .on('click', function () {
-               context.history().clearSaved();
-               modalSelection.remove();
-             });
-
-           reset
-             .append('svg')
-             .attr('class', 'logo logo-reset')
-             .append('use')
-             .attr('xlink:href', '#iD-logo-reset');
-
-           reset
-             .append('div')
-             .text(_t('restore.reset'));
+         var _button = select(null);

 
 

-           restore.node().focus();
-         };
-       }
+         var _body = select(null);

 
 

-       function uiScale(context) {
-           var projection = context.projection,
-               isImperial = !_mainLocalizer.usesMetric(),
-               maxLength = 180,
-               tickHeight = 8;
+         var _loaded;

 
 

+         var _showing;

 
 

-           function scaleDefs(loc1, loc2) {
-               var lat = (loc2[1] + loc1[1]) / 2,
-                   conversion = (isImperial ? 3.28084 : 1),
-                   dist = geoLonToMeters(loc2[0] - loc1[0], lat) * conversion,
-                   scale = { dist: 0, px: 0, text: '' },
-                   buckets, i, val, dLon;
+         function load() {
+           if (!wikibase) return;

 
 

-               if (isImperial) {
-                   buckets = [5280000, 528000, 52800, 5280, 500, 50, 5, 1];
-               } else {
-                   buckets = [5000000, 500000, 50000, 5000, 500, 50, 5, 1];
-               }
+           _button.classed('tag-reference-loading', true);

 
 

-               // determine a user-friendly endpoint for the scale
-               for (i = 0; i < buckets.length; i++) {
-                   val = buckets[i];
-                   if (dist >= val) {
-                       scale.dist = Math.floor(dist / val) * val;
-                       break;
-                   } else {
-                       scale.dist = +dist.toFixed(2);
-                   }
-               }
+           wikibase.getDocs(what, gotDocs);
+         }

 
 

-               dLon = geoMetersToLon(scale.dist / conversion, lat);
-               scale.px = Math.round(projection([loc1[0] + dLon, loc1[1]])[0]);
+         function gotDocs(err, docs) {
+           _body.html('');

 
 

-               scale.text = displayLength(scale.dist / conversion, isImperial);
+           if (!docs || !docs.title) {
+             _body.append('p').attr('class', 'tag-reference-description').html(_t.html('inspector.no_documentation_key'));

 
 

-               return scale;
+             done();
+             return;

            }
 
            }
 

+           if (docs.imageURL) {
+             _body.append('img').attr('class', 'tag-reference-wiki-image').attr('src', docs.imageURL).on('load', function () {
+               done();
+             }).on('error', function () {
+               select(this).remove();
+               done();
+             });
+           } else {
+             done();
+           }

 
 

-           function update(selection) {
-               // choose loc1, loc2 along bottom of viewport (near where the scale will be drawn)
-               var dims = context.map().dimensions(),
-                   loc1 = projection.invert([0, dims[1]]),
-                   loc2 = projection.invert([maxLength, dims[1]]),
-                   scale = scaleDefs(loc1, loc2);
+           _body.append('p').attr('class', 'tag-reference-description').html(docs.description ? _mainLocalizer.htmlForLocalizedText(docs.description, docs.descriptionLocaleCode) : _t.html('inspector.no_documentation_key')).append('a').attr('class', 'tag-reference-edit').attr('target', '_blank').attr('title', _t('inspector.edit_reference')).attr('href', docs.editURL).call(svgIcon('#iD-icon-edit', 'inline'));

 
 

-               selection.select('.scale-path')
-                   .attr('d', 'M0.5,0.5v' + tickHeight + 'h' + scale.px + 'v-' + tickHeight);
+           if (docs.wiki) {
+             _body.append('a').attr('class', 'tag-reference-link').attr('target', '_blank').attr('href', docs.wiki.url).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html(docs.wiki.text));
+           } // Add link to info about "good changeset comments" - #2923

 
 

-               selection.select('.scale-textgroup')
-                   .attr('transform', 'translate(' + (scale.px + 8) + ',' + tickHeight + ')');

 
 

-               selection.select('.scale-text')
-                   .text(scale.text);
+           if (what.key === 'comment') {
+             _body.append('a').attr('class', 'tag-reference-comment-link').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', _t('commit.about_changeset_comments_link')).append('span').html(_t.html('commit.about_changeset_comments'));

            }
            }

+         }

 
 

+         function done() {
+           _loaded = true;

 
 

-           return function(selection) {
-               function switchUnits() {
-                   isImperial = !isImperial;
-                   selection.call(update);
-               }
+           _button.classed('tag-reference-loading', false);

 
 

-               var scalegroup = selection.append('svg')
-                   .attr('class', 'scale')
-                   .on('click', switchUnits)
-                   .append('g')
-                   .attr('transform', 'translate(10,11)');
+           _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');

 
 

-               scalegroup
-                   .append('path')
-                   .attr('class', 'scale-path');
+           _showing = true;

 
 

-               scalegroup
-                   .append('g')
-                   .attr('class', 'scale-textgroup')
-                   .append('text')
-                   .attr('class', 'scale-text');
+           _button.selectAll('svg.icon use').each(function () {
+             var iconUse = select(this);

 
 

-               selection.call(update);
+             if (iconUse.attr('href') === '#iD-icon-info') {
+               iconUse.attr('href', '#iD-icon-info-filled');
+             }
+           });
+         }

 
 

-               context.map().on('move.scale', function() {
-                   update(selection);
-               });
-           };
-       }
+         function hide() {
+           _body.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+             _body.classed('expanded', false);
+           });

 
 

-       function uiShortcuts(context) {
-           var detected = utilDetect();
-           var _activeTab = 0;
-           var _modalSelection;
-           var _selection = select(null);
+           _showing = false;

 
 

+           _button.selectAll('svg.icon use').each(function () {
+             var iconUse = select(this);

 
 

-           context.keybinding()
-               .on([_t('shortcuts.toggle.key'), '?'], function () {
-                   if (context.container().selectAll('.modal-shortcuts').size()) {  // already showing
-                       if (_modalSelection) {
-                           _modalSelection.close();
-                           _modalSelection = null;
-                       }
-                   } else {
-                       _modalSelection = uiModal(_selection);
-                       _modalSelection.call(shortcutsModal);
-                   }
-               });
+             if (iconUse.attr('href') === '#iD-icon-info-filled') {
+               iconUse.attr('href', '#iD-icon-info');
+             }
+           });
+         }

 
 

+         tagReference.button = function (selection, klass, iconName) {
+           _button = selection.selectAll('.tag-reference-button').data([0]);
+           _button = _button.enter().append('button').attr('class', 'tag-reference-button ' + (klass || '')).attr('title', _t('icons.information')).call(svgIcon('#iD-icon-' + (iconName || 'inspect'))).merge(_button);

 
 

-           function shortcutsModal(_modalSelection) {
-               _modalSelection.select('.modal')
-                   .classed('modal-shortcuts', true);
+           _button.on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             this.blur(); // avoid keeping focus on the button - #4641

 
 

-               var content = _modalSelection.select('.content');
+             if (_showing) {
+               hide();
+             } else if (_loaded) {
+               done();
+             } else {
+               load();
+             }
+           });
+         };

 
 

-               content
-                   .append('div')
-                   .attr('class', 'modal-section')
-                   .append('h3')
-                   .text(_t('shortcuts.title'));
+         tagReference.body = function (selection) {
+           var itemID = what.qid || what.key + '-' + (what.value || '');
+           _body = selection.selectAll('.tag-reference-body').data([itemID], function (d) {
+             return d;
+           });
+
+           _body.exit().remove();
+
+           _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);

 
 

-               _mainFileFetcher.get('shortcuts')
-                   .then(function(data) { content.call(render, data); })
-                   .catch(function() { /* ignore */ });
+           if (_showing === false) {
+             hide();

            }
            }

+         };

 
 

+         tagReference.showing = function (val) {
+           if (!arguments.length) return _showing;
+           _showing = val;
+           return tagReference;
+         };

 
 

-           function render(selection, dataShortcuts) {
-               var wrapper = selection
-                   .selectAll('.wrapper')
-                   .data([0]);
+         return tagReference;
+       }

 
 

-               var wrapperEnter = wrapper
-                   .enter()
-                   .append('div')
-                   .attr('class', 'wrapper modal-section');
+       function uiSectionRawTagEditor(id, context) {
+         var section = uiSection(id, context).classes('raw-tag-editor').label(function () {
+           var count = Object.keys(_tags).filter(function (d) {
+             return d;
+           }).length;
+           return _t('inspector.title_count', {
+             title: _t.html('inspector.tags'),
+             count: count
+           });
+         }).expandedByDefault(false).disclosureContent(renderDisclosureContent);
+         var taginfo = services.taginfo;
+         var dispatch = dispatch$8('change');
+         var availableViews = [{
+           id: 'list',
+           icon: '#fas-th-list'
+         }, {
+           id: 'text',
+           icon: '#fas-i-cursor'
+         }];

 
 

-               var tabsBar = wrapperEnter
-                   .append('div')
-                   .attr('class', 'tabs-bar');
+         var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'

 
 

-               var shortcutsList = wrapperEnter
-                   .append('div')
-                   .attr('class', 'shortcuts-list');

 
 

-               wrapper = wrapper.merge(wrapperEnter);
+         var _readOnlyTags = []; // the keys in the order we want them to display

 
 

-               var tabs = tabsBar
-                   .selectAll('.tab')
-                   .data(dataShortcuts);
+         var _orderedKeys = [];
+         var _showBlank = false;
+         var _pendingChange = null;

 
 

-               var tabsEnter = tabs
-                   .enter()
-                   .append('div')
-                   .attr('class', 'tab')
-                   .on('click', function (d, i) {
-                       _activeTab = i;
-                       render(selection, dataShortcuts);
-                   });
+         var _state;

 
 

-               tabsEnter
-                   .append('span')
-                   .text(function (d) { return _t(d.text); });
+         var _presets;

 
 

-               tabs = tabs
-                   .merge(tabsEnter);
+         var _tags;

 
 

-               // Update
-               wrapper.selectAll('.tab')
-                   .classed('active', function (d, i) {
-                       return i === _activeTab;
-                   });
+         var _entityIDs;

 
 

+         var _didInteract = false;

 
 

-               var shortcuts = shortcutsList
-                   .selectAll('.shortcut-tab')
-                   .data(dataShortcuts);
+         function interacted() {
+           _didInteract = true;
+         }

 
 

-               var shortcutsEnter = shortcuts
-                   .enter()
-                   .append('div')
-                   .attr('class', function(d) { return 'shortcut-tab shortcut-tab-' + d.tab; });
+         function renderDisclosureContent(wrap) {
+           // remove deleted keys
+           _orderedKeys = _orderedKeys.filter(function (key) {
+             return _tags[key] !== undefined;
+           }); // When switching to a different entity or changing the state (hover/select)
+           // reorder the keys alphabetically.
+           // We trigger this by emptying the `_orderedKeys` array, then it will be rebuilt here.
+           // Otherwise leave their order alone - #5857, #5927

 
 

-               var columnsEnter = shortcutsEnter
-                   .selectAll('.shortcut-column')
-                   .data(function (d) { return d.columns; })
-                   .enter()
-                   .append('table')
-                   .attr('class', 'shortcut-column');
+           var all = Object.keys(_tags).sort();
+           var missingKeys = utilArrayDifference(all, _orderedKeys);

 
 

-               var rowsEnter = columnsEnter
-                   .selectAll('.shortcut-row')
-                   .data(function (d) { return d.rows; })
-                   .enter()
-                   .append('tr')
-                   .attr('class', 'shortcut-row');
+           for (var i in missingKeys) {
+             _orderedKeys.push(missingKeys[i]);
+           } // assemble row data

 
 
 
 

-               var sectionRows = rowsEnter
-                   .filter(function (d) { return !d.shortcuts; });
+           var rowData = _orderedKeys.map(function (key, i) {
+             return {
+               index: i,
+               key: key,
+               value: _tags[key]
+             };
+           }); // append blank row last, if necessary

 
 

-               sectionRows
-                   .append('td');

 
 

-               sectionRows
-                   .append('td')
-                   .attr('class', 'shortcut-section')
-                   .append('h3')
-                   .text(function (d) { return _t(d.text); });
+           if (!rowData.length || _showBlank) {
+             _showBlank = false;
+             rowData.push({
+               index: rowData.length,
+               key: '',
+               value: ''
+             });
+           } // View Options
+
+
+           var options = wrap.selectAll('.raw-tag-options').data([0]);
+           options.exit().remove();
+           var optionsEnter = options.enter().insert('div', ':first-child').attr('class', 'raw-tag-options');
+           var optionEnter = optionsEnter.selectAll('.raw-tag-option').data(availableViews, function (d) {
+             return d.id;
+           }).enter();
+           optionEnter.append('button').attr('class', function (d) {
+             return 'raw-tag-option raw-tag-option-' + d.id + (_tagView === d.id ? ' selected' : '');
+           }).attr('title', function (d) {
+             return _t('icons.' + d.id);
+           }).on('click', function (d3_event, d) {
+             _tagView = d.id;
+             corePreferences('raw-tag-editor-view', d.id);
+             wrap.selectAll('.raw-tag-option').classed('selected', function (datum) {
+               return datum === d;
+             });
+             wrap.selectAll('.tag-text').classed('hide', d.id !== 'text').each(setTextareaHeight);
+             wrap.selectAll('.tag-list, .add-row').classed('hide', d.id !== 'list');
+           }).each(function (d) {
+             select(this).call(svgIcon(d.icon));
+           }); // View as Text

 
 

+           var textData = rowsToText(rowData);
+           var textarea = wrap.selectAll('.tag-text').data([0]);
+           textarea = textarea.enter().append('textarea').attr('class', 'tag-text' + (_tagView !== 'text' ? ' hide' : '')).call(utilNoAuto).attr('placeholder', _t('inspector.key_value')).attr('spellcheck', 'false').merge(textarea);
+           textarea.call(utilGetSetValue, textData).each(setTextareaHeight).on('input', setTextareaHeight).on('focus', interacted).on('blur', textChanged).on('change', textChanged); // View as List

 
 

-               var shortcutRows = rowsEnter
-                   .filter(function (d) { return d.shortcuts; });
+           var list = wrap.selectAll('.tag-list').data([0]);
+           list = list.enter().append('ul').attr('class', 'tag-list' + (_tagView !== 'list' ? ' hide' : '')).merge(list); // Container for the Add button

 
 

-               var shortcutKeys = shortcutRows
-                   .append('td')
-                   .attr('class', 'shortcut-keys');
+           var addRowEnter = wrap.selectAll('.add-row').data([0]).enter().append('div').attr('class', 'add-row' + (_tagView !== 'list' ? ' hide' : ''));
+           addRowEnter.append('button').attr('class', 'add-tag').call(svgIcon('#iD-icon-plus', 'light')).on('click', addTag);
+           addRowEnter.append('div').attr('class', 'space-value'); // preserve space

 
 

-               var modifierKeys = shortcutKeys
-                   .filter(function (d) { return d.modifiers; });
+           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+           // Tag list items

 
 

-               modifierKeys
-                   .selectAll('kbd.modifier')
-                   .data(function (d) {
-                       if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
-                           return ['⌘'];
-                       } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
-                           return [];
-                       } else {
-                           return d.modifiers;
-                       }
-                   })
-                   .enter()
-                   .each(function () {
-                       var selection = select(this);
+           var items = list.selectAll('.tag-row').data(rowData, function (d) {
+             return d.key;
+           });
+           items.exit().each(unbind).remove(); // Enter

 
 

-                       selection
-                           .append('kbd')
-                           .attr('class', 'modifier')
-                           .text(function (d) { return uiCmd.display(d); });
+           var itemsEnter = items.enter().append('li').attr('class', 'tag-row').classed('readonly', isReadOnly);
+           var innerWrap = itemsEnter.append('div').attr('class', 'inner-wrap');
+           innerWrap.append('div').attr('class', 'key-wrap').append('input').property('type', 'text').attr('class', 'key').call(utilNoAuto).on('focus', interacted).on('blur', keyChange).on('change', keyChange);
+           innerWrap.append('div').attr('class', 'value-wrap').append('input').property('type', 'text').attr('class', 'value').call(utilNoAuto).on('focus', interacted).on('blur', valueChange).on('change', valueChange).on('keydown.push-more', pushMore);
+           innerWrap.append('button').attr('class', 'form-field-button remove').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete')); // Update

 
 

-                       selection
-                           .append('span')
-                           .text('+');
-                   });
+           items = items.merge(itemsEnter).sort(function (a, b) {
+             return a.index - b.index;
+           });
+           items.each(function (d) {
+             var row = select(this);
+             var key = row.select('input.key'); // propagate bound data

 
 

+             var value = row.select('input.value'); // propagate bound data

 
 

-               shortcutKeys
-                   .selectAll('kbd.shortcut')
-                   .data(function (d) {
-                       var arr = d.shortcuts;
-                       if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
-                           arr = ['Y'];
-                       } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
-                           arr = ['F11'];
-                       }
+             if (_entityIDs && taginfo && _state !== 'hover') {
+               bindTypeahead(key, value);
+             }

 
 

-                       // replace translations
-                       arr = arr.map(function(s) {
-                           return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
-                       });
+             var referenceOptions = {
+               key: d.key
+             };

 
 

-                       return utilArrayUniq(arr).map(function(s) {
-                           return {
-                               shortcut: s,
-                               separator: d.separator,
-                               suffix: d.suffix
-                           };
-                       });
-                   })
-                   .enter()
-                   .each(function (d, i, nodes) {
-                       var selection = select(this);
-                       var click = d.shortcut.toLowerCase().match(/(.*).click/);
-
-                       if (click && click[1]) {   // replace "left_click", "right_click" with mouse icon
-                           selection
-                               .call(svgIcon('#iD-walkthrough-mouse-' + click[1], 'operation'));
-                       } else if (d.shortcut.toLowerCase() === 'long-press') {
-                           selection
-                               .call(svgIcon('#iD-walkthrough-longpress', 'longpress operation'));
-                       } else if (d.shortcut.toLowerCase() === 'tap') {
-                           selection
-                               .call(svgIcon('#iD-walkthrough-tap', 'tap operation'));
-                       } else {
-                           selection
-                               .append('kbd')
-                               .attr('class', 'shortcut')
-                               .text(function (d) { return d.shortcut; });
-                       }
+             if (typeof d.value === 'string') {
+               referenceOptions.value = d.value;
+             }

 
 

-                       if (i < nodes.length - 1) {
-                           selection
-                               .append('span')
-                               .text(d.separator || '\u00a0' + _t('shortcuts.or') + '\u00a0');
-                       } else if (i === nodes.length - 1 && d.suffix) {
-                           selection
-                               .append('span')
-                               .text(d.suffix);
-                       }
-                   });
+             var reference = uiTagReference(referenceOptions);

 
 

+             if (_state === 'hover') {
+               reference.showing(false);
+             }

 
 

-               shortcutKeys
-                   .filter(function(d) { return d.gesture; })
-                   .each(function () {
-                       var selection = select(this);
+             row.select('.inner-wrap') // propagate bound data
+             .call(reference.button);
+             row.call(reference.body);
+             row.select('button.remove'); // propagate bound data
+           });
+           items.selectAll('input.key').attr('title', function (d) {
+             return d.key;
+           }).call(utilGetSetValue, function (d) {
+             return d.key;
+           }).attr('readonly', function (d) {
+             return isReadOnly(d) || typeof d.value !== 'string' || null;
+           });
+           items.selectAll('input.value').attr('title', function (d) {
+             return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : d.value;
+           }).classed('mixed', function (d) {
+             return Array.isArray(d.value);
+           }).attr('placeholder', function (d) {
+             return typeof d.value === 'string' ? null : _t('inspector.multiple_values');
+           }).call(utilGetSetValue, function (d) {
+             return typeof d.value === 'string' ? d.value : '';
+           }).attr('readonly', function (d) {
+             return isReadOnly(d) || null;
+           });
+           items.selectAll('button.remove').on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'down', removeTag); // 'click' fires too late - #5878
+         }

 
 

-                       selection
-                           .append('span')
-                           .text('+');
+         function isReadOnly(d) {
+           for (var i = 0; i < _readOnlyTags.length; i++) {
+             if (d.key.match(_readOnlyTags[i]) !== null) {
+               return true;
+             }
+           }

 
 

-                       selection
-                           .append('span')
-                           .attr('class', 'gesture')
-                           .text(function (d) { return _t(d.gesture); });
-                   });
+           return false;
+         }

 
 

+         function setTextareaHeight() {
+           if (_tagView !== 'text') return;
+           var selection = select(this);
+           var matches = selection.node().value.match(/\n/g);
+           var lineCount = 2 + Number(matches && matches.length);
+           var lineHeight = 20;
+           selection.style('height', lineCount * lineHeight + 'px');
+         }

 
 

-               shortcutRows
-                   .append('td')
-                   .attr('class', 'shortcut-desc')
-                   .text(function (d) { return d.text ? _t(d.text) : '\u00a0'; });
+         function stringify(s) {
+           return JSON.stringify(s).slice(1, -1); // without leading/trailing "
+         }

 
 

+         function unstringify(s) {
+           var leading = '';
+           var trailing = '';

 
 

-               shortcuts = shortcuts
-                   .merge(shortcutsEnter);
+           if (s.length < 1 || s.charAt(0) !== '"') {
+             leading = '"';
+           }

 
 

-               // Update
-               wrapper.selectAll('.shortcut-tab')
-                   .style('display', function (d, i) {
-                       return i === _activeTab ? 'flex' : 'none';
-                   });
+           if (s.length < 2 || s.charAt(s.length - 1) !== '"' || s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\') {
+             trailing = '"';

            }
 
            }
 

+           return JSON.parse(leading + s + trailing);
+         }

 
 

-           return function(selection, show) {
-               _selection = selection;
-               if (show) {
-                   _modalSelection = uiModal(selection);
-                   _modalSelection.call(shortcutsModal);
-               }
-           };
-       }
+         function rowsToText(rows) {
+           var str = rows.filter(function (row) {
+             return row.key && row.key.trim() !== '';
+           }).map(function (row) {
+             var rawVal = row.value;
+             if (typeof rawVal !== 'string') rawVal = '*';
+             var val = rawVal ? stringify(rawVal) : '';
+             return stringify(row.key) + '=' + val;
+           }).join('\n');

 
 

-       var pair_1 = pair;
+           if (_state !== 'hover' && str.length) {
+             return str + '\n';
+           }

 
 

+           return str;
+         }

 
 

-       function search(input, dims) {
-         if (!dims) { dims = 'NSEW'; }
-         if (typeof input !== 'string') { return null; }
+         function textChanged() {
+           var newText = this.value.trim();
+           var newTags = {};
+           newText.split('\n').forEach(function (row) {
+             var m = row.match(/^\s*([^=]+)=(.*)$/);

 
 

-         input = input.toUpperCase();
-         var regex = /^[\s\,]*([NSEW])?\s*([\-|\—|\―]?[0-9.]+)[°º˚]?\s*(?:([0-9.]+)['’′‘]\s*)?(?:([0-9.]+)(?:''|"|”|″)\s*)?([NSEW])?/;
+             if (m !== null) {
+               var k = context.cleanTagKey(unstringify(m[1].trim()));
+               var v = context.cleanTagValue(unstringify(m[2].trim()));
+               newTags[k] = v;
+             }
+           });
+           var tagDiff = utilTagDiff(_tags, newTags);
+           if (!tagDiff.length) return;
+           _pendingChange = _pendingChange || {};
+           tagDiff.forEach(function (change) {
+             if (isReadOnly({
+               key: change.key
+             })) return; // skip unchanged multiselection placeholders
+
+             if (change.newVal === '*' && typeof change.oldVal !== 'string') return;
+
+             if (change.type === '-') {
+               _pendingChange[change.key] = undefined;
+             } else if (change.type === '+') {
+               _pendingChange[change.key] = change.newVal || '';
+             }
+           });

 
 

-         var m = input.match(regex);
-         if (!m) { return null; }  // no match
+           if (Object.keys(_pendingChange).length === 0) {
+             _pendingChange = null;
+             return;
+           }

 
 

-         var matched = m[0];
+           scheduleChange();
+         }

 
 

-         // extract dimension.. m[1] = leading, m[5] = trailing
-         var dim;
-         if (m[1] && m[5]) {                 // if matched both..
-           dim = m[1];                       // keep leading
-           matched = matched.slice(0, -1);   // remove trailing dimension from match
-         } else {
-           dim = m[1] || m[5];
+         function pushMore(d3_event) {
+           // if pressing Tab on the last value field with content, add a blank row
+           if (d3_event.keyCode === 9 && !d3_event.shiftKey && section.selection().selectAll('.tag-list li:last-child input.value').node() === this && utilGetSetValue(select(this))) {
+             addTag();
+           }

          }
 
          }
 

-         // if unrecognized dimension
-         if (dim && dims.indexOf(dim) === -1) { return null; }
+         function bindTypeahead(key, value) {
+           if (isReadOnly(key.datum())) return;

 
 

-         // extract DMS
-         var deg = m[2] ? parseFloat(m[2]) : 0;
-         var min = m[3] ? parseFloat(m[3]) / 60 : 0;
-         var sec = m[4] ? parseFloat(m[4]) / 3600 : 0;
-         var sign = (deg < 0) ? -1 : 1;
-         if (dim === 'S' || dim === 'W') { sign *= -1; }
+           if (Array.isArray(value.datum().value)) {
+             value.call(uiCombobox(context, 'tag-value').minItems(1).fetcher(function (value, callback) {
+               var keyString = utilGetSetValue(key);
+               if (!_tags[keyString]) return;

 
 

-         return {
-           val: (Math.abs(deg) + min + sec) * sign,
-           dim: dim,
-           matched: matched,
-           remain: input.slice(matched.length)
-         };
-       }
+               var data = _tags[keyString].filter(Boolean).map(function (tagValue) {
+                 return {
+                   value: tagValue,
+                   title: tagValue
+                 };
+               });

 
 

+               callback(data);
+             }));
+             return;
+           }

 
 

-       function pair(input, dims) {
-         input = input.trim();
-         var one = search(input, dims);
-         if (!one) { return null; }
+           var geometry = context.graph().geometry(_entityIDs[0]);
+           key.call(uiCombobox(context, 'tag-key').fetcher(function (value, callback) {
+             taginfo.keys({
+               debounce: true,
+               geometry: geometry,
+               query: value
+             }, function (err, data) {
+               if (!err) {
+                 var filtered = data.filter(function (d) {
+                   return _tags[d.value] === undefined;
+                 });
+                 callback(sort(value, filtered));
+               }
+             });
+           }));
+           value.call(uiCombobox(context, 'tag-value').fetcher(function (value, callback) {
+             taginfo.values({
+               debounce: true,
+               key: utilGetSetValue(key),
+               geometry: geometry,
+               query: value
+             }, function (err, data) {
+               if (!err) callback(sort(value, data));
+             });
+           }));

 
 

-         input = one.remain.trim();
-         var two = search(input, dims);
-         if (!two || two.remain) { return null; }
+           function sort(value, data) {
+             var sameletter = [];
+             var other = [];

 
 

-         if (one.dim) {
-           return swapdim(one.val, two.val, one.dim);
-         } else {
-           return [one.val, two.val];
+             for (var i = 0; i < data.length; i++) {
+               if (data[i].value.substring(0, value.length) === value) {
+                 sameletter.push(data[i]);
+               } else {
+                 other.push(data[i]);
+               }
+             }
+
+             return sameletter.concat(other);
+           }

          }
          }

-       }

 
 

+         function unbind() {
+           var row = select(this);
+           row.selectAll('input.key').call(uiCombobox.off, context);
+           row.selectAll('input.value').call(uiCombobox.off, context);
+         }

 
 

-       function swapdim(a, b, dim) {
-         if (dim === 'N' || dim === 'S') { return [a, b]; }
-         if (dim === 'W' || dim === 'E') { return [b, a]; }
-       }
+         function keyChange(d3_event, d) {
+           if (select(this).attr('readonly')) return;
+           var kOld = d.key; // exit if we are currently about to delete this row anyway - #6366

 
 

-       function uiFeatureList(context) {
-           var _geocodeResults;
+           if (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) return;
+           var kNew = context.cleanTagKey(this.value.trim()); // allow no change if the key should be readonly

 
 

+           if (isReadOnly({
+             key: kNew
+           })) {
+             this.value = kOld;
+             return;
+           }

 
 

-           function featureList(selection) {
-               var header = selection
-                   .append('div')
-                   .attr('class', 'header fillL cf');
+           if (kNew && kNew !== kOld && _tags[kNew] !== undefined) {
+             // new key is already in use, switch focus to the existing row
+             this.value = kOld; // reset the key

 
 

-               header
-                   .append('h3')
-                   .text(_t('inspector.feature_list'));
+             section.selection().selectAll('.tag-list input.value').each(function (d) {
+               if (d.key === kNew) {
+                 // send focus to that other value combo instead
+                 var input = select(this).node();
+                 input.focus();
+                 input.select();
+               }
+             });
+             return;
+           }

 
 

-               var searchWrap = selection
-                   .append('div')
-                   .attr('class', 'search-header');
+           var row = this.parentNode.parentNode;
+           var inputVal = select(row).selectAll('input.value');
+           var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
+           _pendingChange = _pendingChange || {};

 
 

-               var search = searchWrap
-                   .append('input')
-                   .attr('placeholder', _t('inspector.search'))
-                   .attr('type', 'search')
-                   .call(utilNoAuto)
-                   .on('keypress', keypress)
-                   .on('keydown', keydown)
-                   .on('input', inputevent);
+           if (kOld) {
+             _pendingChange[kOld] = undefined;
+           }

 
 

-               searchWrap
-                   .call(svgIcon('#iD-icon-search', 'pre-text'));
+           _pendingChange[kNew] = vNew; // update the ordered key index so this row doesn't change position

 
 

-               var listWrap = selection
-                   .append('div')
-                   .attr('class', 'inspector-body');
+           var existingKeyIndex = _orderedKeys.indexOf(kOld);

 
 

-               var list = listWrap
-                   .append('div')
-                   .attr('class', 'feature-list cf');
+           if (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
+           d.key = kNew; // update datum to avoid exit/enter on tag update

 
 

-               context
-                   .on('exit.feature-list', clearSearch);
-               context.map()
-                   .on('drawn.feature-list', mapDrawn);
+           d.value = vNew;
+           this.value = kNew;
+           utilGetSetValue(inputVal, vNew);
+           scheduleChange();
+         }

 
 

-               context.keybinding()
-                   .on(uiCmd('⌘F'), focusSearch);
+         function valueChange(d3_event, d) {
+           if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered

 
 

+           if (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366

 
 

-               function focusSearch() {
-                   var mode = context.mode() && context.mode().id;
-                   if (mode !== 'browse') { return; }
+           if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
+           _pendingChange = _pendingChange || {};
+           _pendingChange[d.key] = context.cleanTagValue(this.value);
+           scheduleChange();
+         }

 
 

-                   event.preventDefault();
-                   search.node().focus();
-               }
+         function removeTag(d3_event, d) {
+           if (isReadOnly(d)) return;

 
 

+           if (d.key === '') {
+             // removing the blank row
+             _showBlank = false;
+             section.reRender();
+           } else {
+             // remove the key from the ordered key index
+             _orderedKeys = _orderedKeys.filter(function (key) {
+               return key !== d.key;
+             });
+             _pendingChange = _pendingChange || {};
+             _pendingChange[d.key] = undefined;
+             scheduleChange();
+           }
+         }

 
 

-               function keydown() {
-                   if (event.keyCode === 27) {  // escape
-                       search.node().blur();
-                   }
-               }
+         function addTag() {
+           // Delay render in case this click is blurring an edited combo.
+           // Without the setTimeout, the `content` render would wipe out the pending tag change.
+           window.setTimeout(function () {
+             _showBlank = true;
+             section.reRender();
+             section.selection().selectAll('.tag-list li:last-child input.key').node().focus();
+           }, 20);
+         }

 
 

+         function scheduleChange() {
+           // Cache IDs in case the editor is reloaded before the change event is called. - #6028
+           var entityIDs = _entityIDs; // Delay change in case this change is blurring an edited combo. - #5878

 
 

-               function keypress() {
-                   var q = search.property('value'),
-                       items = list.selectAll('.feature-list-item');
-                   if (event.keyCode === 13 && q.length && items.size()) {  // return
-                       click(items.datum());
-                   }
-               }
+           window.setTimeout(function () {
+             if (!_pendingChange) return;
+             dispatch.call('change', this, entityIDs, _pendingChange);
+             _pendingChange = null;
+           }, 10);
+         }

 
 

+         section.state = function (val) {
+           if (!arguments.length) return _state;

 
 

-               function inputevent() {
-                   _geocodeResults = undefined;
-                   drawList();
-               }
+           if (_state !== val) {
+             _orderedKeys = [];
+             _state = val;
+           }

 
 

+           return section;
+         };

 
 

-               function clearSearch() {
-                   search.property('value', '');
-                   drawList();
-               }
+         section.presets = function (val) {
+           if (!arguments.length) return _presets;
+           _presets = val;

 
 

+           if (_presets && _presets.length && _presets[0].isFallback()) {
+             section.disclosureExpanded(true); // don't collapse the disclosure if the mapper used the raw tag editor - #1881
+           } else if (!_didInteract) {
+             section.disclosureExpanded(null);
+           }

 
 

-               function mapDrawn(e) {
-                   if (e.full) {
-                       drawList();
-                   }
-               }
+           return section;
+         };

 
 

+         section.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val;
+           return section;
+         };

 
 

-               function features() {
-                   var result = [];
-                   var graph = context.graph();
-                   var visibleCenter = context.map().extent().center();
-                   var q = search.property('value').toLowerCase();
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;

 
 

-                   if (!q) { return result; }
+           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+             _entityIDs = val;
+             _orderedKeys = [];
+           }

 
 

-                   var idMatch = q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
+           return section;
+         }; // pass an array of regular expressions to test against the tag key

 
 

-                   if (idMatch) {
-                       var elemType = idMatch[1].charAt(0);
-                       var elemId = idMatch[2];
-                       result.push({
-                           id: elemType + elemId,
-                           geometry: elemType === 'n' ? 'point' : elemType === 'w' ? 'line' : 'relation',
-                           type: elemType === 'n' ? _t('inspector.node') : elemType === 'w' ? _t('inspector.way') : _t('inspector.relation'),
-                           name: elemId
-                       });
-                   }

 
 

-                   var locationMatch = pair_1(q.toUpperCase()) || q.match(/^(-?\d+\.?\d*)\s+(-?\d+\.?\d*)$/);
+         section.readOnlyTags = function (val) {
+           if (!arguments.length) return _readOnlyTags;
+           _readOnlyTags = val;
+           return section;
+         };

 
 

-                   if (locationMatch) {
-                       var loc = [parseFloat(locationMatch[0]), parseFloat(locationMatch[1])];
-                       result.push({
-                           id: -1,
-                           geometry: 'point',
-                           type: _t('inspector.location'),
-                           name: dmsCoordinatePair([loc[1], loc[0]]),
-                           location: loc
-                       });
-                   }
+         return utilRebind(section, dispatch, 'on');
+       }

 
 

-                   var allEntities = graph.entities;
-                   var localResults = [];
-                   for (var id in allEntities) {
-                       var entity = allEntities[id];
-                       if (!entity) { continue; }
-
-                       var name = utilDisplayName(entity) || '';
-                       if (name.toLowerCase().indexOf(q) < 0) { continue; }
-
-                       var matched = _mainPresetIndex.match(entity, graph);
-                       var type = (matched && matched.name()) || utilDisplayType(entity.id);
-                       var extent = entity.extent(graph);
-                       var distance = extent ? geoSphericalDistance(visibleCenter, extent.center()) : 0;
-
-                       localResults.push({
-                           id: entity.id,
-                           entity: entity,
-                           geometry: entity.geometry(graph),
-                           type: type,
-                           name: name,
-                           distance: distance
-                       });
+       function uiDataEditor(context) {
+         var dataHeader = uiDataHeader();
+         var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);

 
 

-                       if (localResults.length > 100) { break; }
-                   }
-                   localResults = localResults.sort(function byDistance(a, b) {
-                       return a.distance - b.distance;
-                   });
-                   result = result.concat(localResults);
+         var _datum;

 
 

-                   (_geocodeResults || []).forEach(function(d) {
-                       if (d.osm_type && d.osm_id) {    // some results may be missing these - #1890
+         function dataEditor(selection) {
+           var header = selection.selectAll('.header').data([0]);
+           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'close').on('click', function () {
+             context.enter(modeBrowse(context));
+           }).call(svgIcon('#iD-icon-close'));
+           headerEnter.append('h3').html(_t.html('map_data.title'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body);
+           var editor = body.selectAll('.data-editor').data([0]); // enter/update

 
 

-                           // Make a temporary osmEntity so we can preset match
-                           // and better localize the search result - #4725
-                           var id = osmEntity.id.fromOSM(d.osm_type, d.osm_id);
-                           var tags = {};
-                           tags[d.class] = d.type;
+           editor.enter().append('div').attr('class', 'modal-section data-editor').merge(editor).call(dataHeader.datum(_datum));
+           var rte = body.selectAll('.raw-tag-editor').data([0]); // enter/update

 
 

-                           var attrs = { id: id, type: d.osm_type, tags: tags };
-                           if (d.osm_type === 'way') {   // for ways, add some fake closed nodes
-                               attrs.nodes = ['a','a'];  // so that geometry area is possible
-                           }
+           rte.enter().append('div').attr('class', 'raw-tag-editor data-editor').merge(rte).call(rawTagEditor.tags(_datum && _datum.properties || {}).state('hover').render).selectAll('textarea.tag-text').attr('readonly', true).classed('readonly', true);
+         }

 
 

-                           var tempEntity = osmEntity(attrs);
-                           var tempGraph = coreGraph([tempEntity]);
-                           var matched = _mainPresetIndex.match(tempEntity, tempGraph);
-                           var type = (matched && matched.name()) || utilDisplayType(id);
-
-                           result.push({
-                               id: tempEntity.id,
-                               geometry: tempEntity.geometry(tempGraph),
-                               type: type,
-                               name: d.display_name,
-                               extent: new geoExtent(
-                                   [parseFloat(d.boundingbox[3]), parseFloat(d.boundingbox[0])],
-                                   [parseFloat(d.boundingbox[2]), parseFloat(d.boundingbox[1])])
-                           });
-                       }
-                   });
+         dataEditor.datum = function (val) {
+           if (!arguments.length) return _datum;
+           _datum = val;
+           return this;
+         };

 
 

-                   if (q.match(/^[0-9]+$/)) {
-                       // if query is just a number, possibly an OSM ID without a prefix
-                       result.push({
-                           id: 'n' + q,
-                           geometry: 'point',
-                           type: _t('inspector.node'),
-                           name: q
-                       });
-                       result.push({
-                           id: 'w' + q,
-                           geometry: 'line',
-                           type: _t('inspector.way'),
-                           name: q
-                       });
-                       result.push({
-                           id: 'r' + q,
-                           geometry: 'relation',
-                           type: _t('inspector.relation'),
-                           name: q
-                       });
-                   }
+         return dataEditor;
+       }

 
 

-                   return result;
-               }
+       var sexagesimal = {exports: {}};

 
 

+       sexagesimal.exports = element;
+       var pair_1 = sexagesimal.exports.pair = pair;
+       sexagesimal.exports.format = format;
+       sexagesimal.exports.formatPair = formatPair;
+       sexagesimal.exports.coordToDMS = coordToDMS;

 
 

-               function drawList() {
-                   var value = search.property('value');
-                   var results = features();
+       function element(input, dims) {
+         var result = search(input, dims);
+         return result === null ? null : result.val;
+       }

 
 

-                   list.classed('filtered', value.length);
+       function formatPair(input) {
+         return format(input.lat, 'lat') + ' ' + format(input.lon, 'lon');
+       } // Is 0 North or South?

 
 

-                   var resultsIndicator = list.selectAll('.no-results-item')
-                       .data([0])
-                       .enter()
-                       .append('button')
-                       .property('disabled', true)
-                       .attr('class', 'no-results-item')
-                       .call(svgIcon('#iD-icon-alert', 'pre-text'));
-
-                   resultsIndicator.append('span')
-                       .attr('class', 'entity-name');
-
-                   list.selectAll('.no-results-item .entity-name')
-                       .text(_t('geocoder.no_results_worldwide'));
-
-                   if (services.geocoder) {
-                     list.selectAll('.geocode-item')
-                         .data([0])
-                         .enter()
-                         .append('button')
-                         .attr('class', 'geocode-item')
-                         .on('click', geocoderSearch)
-                         .append('div')
-                         .attr('class', 'label')
-                         .append('span')
-                         .attr('class', 'entity-name')
-                         .text(_t('geocoder.search'));
-                   }

 
 

-                   list.selectAll('.no-results-item')
-                       .style('display', (value.length && !results.length) ? 'block' : 'none');
+       function format(input, dim) {
+         var dms = coordToDMS(input, dim);
+         return dms.whole + '° ' + (dms.minutes ? dms.minutes + '\' ' : '') + (dms.seconds ? dms.seconds + '" ' : '') + dms.dir;
+       }

 
 

-                   list.selectAll('.geocode-item')
-                       .style('display', (value && _geocodeResults === undefined) ? 'block' : 'none');
+       function coordToDMS(input, dim) {
+         var dirs = {
+           lat: ['N', 'S'],
+           lon: ['E', 'W']
+         }[dim] || '';
+         var dir = dirs[input >= 0 ? 0 : 1];
+         var abs = Math.abs(input);
+         var whole = Math.floor(abs);
+         var fraction = abs - whole;
+         var fractionMinutes = fraction * 60;
+         var minutes = Math.floor(fractionMinutes);
+         var seconds = Math.floor((fractionMinutes - minutes) * 60);
+         return {
+           whole: whole,
+           minutes: minutes,
+           seconds: seconds,
+           dir: dir
+         };
+       }

 
 

-                   list.selectAll('.feature-list-item')
-                       .data([-1])
-                       .remove();
+       function search(input, dims) {
+         if (!dims) dims = 'NSEW';
+         if (typeof input !== 'string') return null;
+         input = input.toUpperCase();
+         var regex = /^[\s\,]*([NSEW])?\s*([\-|\—|\―]?[0-9.]+)[°º˚]?\s*(?:([0-9.]+)['’′‘]\s*)?(?:([0-9.]+)(?:''|"|”|″)\s*)?([NSEW])?/;
+         var m = input.match(regex);
+         if (!m) return null; // no match

 
 

-                   var items = list.selectAll('.feature-list-item')
-                       .data(results, function(d) { return d.id; });
+         var matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing

 
 

-                   var enter = items.enter()
-                       .insert('button', '.geocode-item')
-                       .attr('class', 'feature-list-item')
-                       .on('mouseover', mouseover)
-                       .on('mouseout', mouseout)
-                       .on('click', click);
+         var dim;

 
 

-                   var label = enter
-                       .append('div')
-                       .attr('class', 'label');
+         if (m[1] && m[5]) {
+           // if matched both..
+           dim = m[1]; // keep leading

 
 

-                   label
-                       .each(function(d) {
-                           select(this)
-                               .call(svgIcon('#iD-icon-' + d.geometry, 'pre-text'));
-                       });
+           matched = matched.slice(0, -1); // remove trailing dimension from match
+         } else {
+           dim = m[1] || m[5];
+         } // if unrecognized dimension

 
 

-                   label
-                       .append('span')
-                       .attr('class', 'entity-type')
-                       .text(function(d) { return d.type; });

 
 

-                   label
-                       .append('span')
-                       .attr('class', 'entity-name')
-                       .text(function(d) { return d.name; });
+         if (dim && dims.indexOf(dim) === -1) return null; // extract DMS

 
 

-                   enter
-                       .style('opacity', 0)
-                       .transition()
-                       .style('opacity', 1);
+         var deg = m[2] ? parseFloat(m[2]) : 0;
+         var min = m[3] ? parseFloat(m[3]) / 60 : 0;
+         var sec = m[4] ? parseFloat(m[4]) / 3600 : 0;
+         var sign = deg < 0 ? -1 : 1;
+         if (dim === 'S' || dim === 'W') sign *= -1;
+         return {
+           val: (Math.abs(deg) + min + sec) * sign,
+           dim: dim,
+           matched: matched,
+           remain: input.slice(matched.length)
+         };
+       }

 
 

-                   items.order();
+       function pair(input, dims) {
+         input = input.trim();
+         var one = search(input, dims);
+         if (!one) return null;
+         input = one.remain.trim();
+         var two = search(input, dims);
+         if (!two || two.remain) return null;

 
 

-                   items.exit()
-                       .remove();
-               }
+         if (one.dim) {
+           return swapdim(one.val, two.val, one.dim);
+         } else {
+           return [one.val, two.val];
+         }
+       }

 
 

+       function swapdim(a, b, dim) {
+         if (dim === 'N' || dim === 'S') return [a, b];
+         if (dim === 'W' || dim === 'E') return [b, a];
+       }

 
 

-               function mouseover(d) {
-                   if (d.id === -1) { return; }
+       function uiFeatureList(context) {
+         var _geocodeResults;
+
+         function featureList(selection) {
+           var header = selection.append('div').attr('class', 'header fillL');
+           header.append('h3').html(_t.html('inspector.feature_list'));
+           var searchWrap = selection.append('div').attr('class', 'search-header');
+           searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
+           var search = searchWrap.append('input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keypress', keypress).on('keydown', keydown).on('input', inputevent);
+           var listWrap = selection.append('div').attr('class', 'inspector-body');
+           var list = listWrap.append('div').attr('class', 'feature-list');
+           context.on('exit.feature-list', clearSearch);
+           context.map().on('drawn.feature-list', mapDrawn);
+           context.keybinding().on(uiCmd('⌘F'), focusSearch);
+
+           function focusSearch(d3_event) {
+             var mode = context.mode() && context.mode().id;
+             if (mode !== 'browse') return;
+             d3_event.preventDefault();
+             search.node().focus();
+           }
+
+           function keydown(d3_event) {
+             if (d3_event.keyCode === 27) {
+               // escape
+               search.node().blur();
+             }
+           }

 
 

-                   utilHighlightEntities([d.id], true, context);
-               }
+           function keypress(d3_event) {
+             var q = search.property('value'),
+                 items = list.selectAll('.feature-list-item');

 
 

+             if (d3_event.keyCode === 13 && // ↩ Return
+             q.length && items.size()) {
+               click(d3_event, items.datum());
+             }
+           }

 
 

-               function mouseout(d) {
-                   if (d.id === -1) { return; }
+           function inputevent() {
+             _geocodeResults = undefined;
+             drawList();
+           }

 
 

-                   utilHighlightEntities([d.id], false, context);
-               }
+           function clearSearch() {
+             search.property('value', '');
+             drawList();
+           }

 
 

+           function mapDrawn(e) {
+             if (e.full) {
+               drawList();
+             }
+           }

 
 

-               function click(d) {
-                   event.preventDefault();
+           function features() {
+             var result = [];
+             var graph = context.graph();
+             var visibleCenter = context.map().extent().center();
+             var q = search.property('value').toLowerCase();
+             if (!q) return result;
+             var locationMatch = pair_1(q.toUpperCase()) || q.match(/^(-?\d+\.?\d*)\s+(-?\d+\.?\d*)$/);
+
+             if (locationMatch) {
+               var loc = [parseFloat(locationMatch[0]), parseFloat(locationMatch[1])];
+               result.push({
+                 id: -1,
+                 geometry: 'point',
+                 type: _t('inspector.location'),
+                 name: dmsCoordinatePair([loc[1], loc[0]]),
+                 location: loc
+               });
+             } // A location search takes priority over an ID search

 
 

-                   if (d.location) {
-                       context.map().centerZoomEase([d.location[1], d.location[0]], 19);

 
 

-                   } else if (d.entity) {
-                       utilHighlightEntities([d.id], false, context);
+             var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);

 
 

-                       context.enter(modeSelect(context, [d.entity.id]));
-                       context.map().zoomToEase(d.entity);
+             if (idMatch) {
+               var elemType = idMatch[1].charAt(0);
+               var elemId = idMatch[2];
+               result.push({
+                 id: elemType + elemId,
+                 geometry: elemType === 'n' ? 'point' : elemType === 'w' ? 'line' : 'relation',
+                 type: elemType === 'n' ? _t('inspector.node') : elemType === 'w' ? _t('inspector.way') : _t('inspector.relation'),
+                 name: elemId
+               });
+             }

 
 

-                   } else {
-                       // download, zoom to, and select the entity with the given ID
-                       context.zoomToEntity(d.id);
-                   }
-               }
+             var allEntities = graph.entities;
+             var localResults = [];

 
 

+             for (var id in allEntities) {
+               var entity = allEntities[id];
+               if (!entity) continue;
+               var name = utilDisplayName(entity) || '';
+               if (name.toLowerCase().indexOf(q) < 0) continue;
+               var matched = _mainPresetIndex.match(entity, graph);
+               var type = matched && matched.name() || utilDisplayType(entity.id);
+               var extent = entity.extent(graph);
+               var distance = extent ? geoSphericalDistance(visibleCenter, extent.center()) : 0;
+               localResults.push({
+                 id: entity.id,
+                 entity: entity,
+                 geometry: entity.geometry(graph),
+                 type: type,
+                 name: name,
+                 distance: distance
+               });
+               if (localResults.length > 100) break;
+             }

 
 

-               function geocoderSearch() {
-                   services.geocoder.search(search.property('value'), function (err, resp) {
-                       _geocodeResults = resp || [];
-                       drawList();
-                   });
-               }
-           }
+             localResults = localResults.sort(function byDistance(a, b) {
+               return a.distance - b.distance;
+             });
+             result = result.concat(localResults);
+
+             (_geocodeResults || []).forEach(function (d) {
+               if (d.osm_type && d.osm_id) {
+                 // some results may be missing these - #1890
+                 // Make a temporary osmEntity so we can preset match
+                 // and better localize the search result - #4725
+                 var id = osmEntity.id.fromOSM(d.osm_type, d.osm_id);
+                 var tags = {};
+                 tags[d["class"]] = d.type;
+                 var attrs = {
+                   id: id,
+                   type: d.osm_type,
+                   tags: tags
+                 };

 
 

+                 if (d.osm_type === 'way') {
+                   // for ways, add some fake closed nodes
+                   attrs.nodes = ['a', 'a']; // so that geometry area is possible
+                 }

 
 

-           return featureList;
-       }
+                 var tempEntity = osmEntity(attrs);
+                 var tempGraph = coreGraph([tempEntity]);
+                 var matched = _mainPresetIndex.match(tempEntity, tempGraph);
+                 var type = matched && matched.name() || utilDisplayType(id);
+                 result.push({
+                   id: tempEntity.id,
+                   geometry: tempEntity.geometry(tempGraph),
+                   type: type,
+                   name: d.display_name,
+                   extent: new geoExtent([parseFloat(d.boundingbox[3]), parseFloat(d.boundingbox[0])], [parseFloat(d.boundingbox[2]), parseFloat(d.boundingbox[1])])
+                 });
+               }
+             });

 
 

-       function uiSectionEntityIssues(context) {
+             if (q.match(/^[0-9]+$/)) {
+               // if query is just a number, possibly an OSM ID without a prefix
+               result.push({
+                 id: 'n' + q,
+                 geometry: 'point',
+                 type: _t('inspector.node'),
+                 name: q
+               });
+               result.push({
+                 id: 'w' + q,
+                 geometry: 'line',
+                 type: _t('inspector.way'),
+                 name: q
+               });
+               result.push({
+                 id: 'r' + q,
+                 geometry: 'relation',
+                 type: _t('inspector.relation'),
+                 name: q
+               });
+             }

 
 

-           var _entityIDs = [];
-           var _issues = [];
-           var _activeIssueID;
+             return result;
+           }

 
 

-           var section = uiSection('entity-issues', context)
-               .shouldDisplay(function() {
-                   return _issues.length > 0;
-               })
-               .title(function() {
-                   return _t('issues.list_title', { count: _issues.length });
-               })
-               .disclosureContent(renderDisclosureContent);
+           function drawList() {
+             var value = search.property('value');
+             var results = features();
+             list.classed('filtered', value.length);
+             var resultsIndicator = list.selectAll('.no-results-item').data([0]).enter().append('button').property('disabled', true).attr('class', 'no-results-item').call(svgIcon('#iD-icon-alert', 'pre-text'));
+             resultsIndicator.append('span').attr('class', 'entity-name');
+             list.selectAll('.no-results-item .entity-name').html(_t.html('geocoder.no_results_worldwide'));

 
 

-           context.validator()
-               .on('validated.entity_issues', function() {
-                   // Refresh on validated events
-                   reloadIssues();
-                   section.reRender();
-               })
-               .on('focusedIssue.entity_issues', function(issue) {
-                    makeActiveIssue(issue.id);
-               });
+             if (services.geocoder) {
+               list.selectAll('.geocode-item').data([0]).enter().append('button').attr('class', 'geocode-item secondary-action').on('click', geocoderSearch).append('div').attr('class', 'label').append('span').attr('class', 'entity-name').html(_t.html('geocoder.search'));
+             }

 
 

-           function reloadIssues() {
-               _issues = context.validator().getSharedEntityIssues(_entityIDs, { includeDisabledRules: true });
+             list.selectAll('.no-results-item').style('display', value.length && !results.length ? 'block' : 'none');
+             list.selectAll('.geocode-item').style('display', value && _geocodeResults === undefined ? 'block' : 'none');
+             list.selectAll('.feature-list-item').data([-1]).remove();
+             var items = list.selectAll('.feature-list-item').data(results, function (d) {
+               return d.id;
+             });
+             var enter = items.enter().insert('button', '.geocode-item').attr('class', 'feature-list-item').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
+             var label = enter.append('div').attr('class', 'label');
+             label.each(function (d) {
+               select(this).call(svgIcon('#iD-icon-' + d.geometry, 'pre-text'));
+             });
+             label.append('span').attr('class', 'entity-type').html(function (d) {
+               return d.type;
+             });
+             label.append('span').attr('class', 'entity-name').html(function (d) {
+               return d.name;
+             });
+             enter.style('opacity', 0).transition().style('opacity', 1);
+             items.order();
+             items.exit().remove();

            }
 
            }
 

-           function makeActiveIssue(issueID) {
-               _activeIssueID = issueID;
-               section.selection().selectAll('.issue-container')
-                   .classed('active', function(d) { return d.id === _activeIssueID; });
+           function mouseover(d3_event, d) {
+             if (d.id === -1) return;
+             utilHighlightEntities([d.id], true, context);

            }
 
            }
 

-           function renderDisclosureContent(selection) {
+           function mouseout(d3_event, d) {
+             if (d.id === -1) return;
+             utilHighlightEntities([d.id], false, context);
+           }

 
 

-               selection.classed('grouped-items-area', true);
+           function click(d3_event, d) {
+             d3_event.preventDefault();

 
 

-               _activeIssueID = _issues.length > 0 ? _issues[0].id : null;
+             if (d.location) {
+               context.map().centerZoomEase([d.location[1], d.location[0]], 19);
+             } else if (d.entity) {
+               utilHighlightEntities([d.id], false, context);
+               context.enter(modeSelect(context, [d.entity.id]));
+               context.map().zoomToEase(d.entity);
+             } else {
+               // download, zoom to, and select the entity with the given ID
+               context.zoomToEntity(d.id);
+             }
+           }

 
 

-               var containers = selection.selectAll('.issue-container')
-                   .data(_issues, function(d) { return d.id; });
+           function geocoderSearch() {
+             services.geocoder.search(search.property('value'), function (err, resp) {
+               _geocodeResults = resp || [];
+               drawList();
+             });
+           }
+         }

 
 

-               // Exit
-               containers.exit()
-                   .remove();
+         return featureList;
+       }

 
 

-               // Enter
-               var containersEnter = containers.enter()
-                   .append('div')
-                   .attr('class', 'issue-container');
+       var $$1 = _export;
+       var getOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
+       var toLength$1 = toLength$q;
+       var notARegExp$1 = notARegexp;
+       var requireObjectCoercible$1 = requireObjectCoercible$e;
+       var correctIsRegExpLogic$1 = correctIsRegexpLogic;

 
 

+       // eslint-disable-next-line es/no-string-prototype-startswith -- safe
+       var $startsWith = ''.startsWith;
+       var min$1 = Math.min;

 
 

-               var itemsEnter = containersEnter
-                   .append('div')
-                   .attr('class', function(d) { return 'issue severity-' + d.severity; })
-                   .on('mouseover.highlight', function(d) {
-                       // don't hover-highlight the selected entity
-                       var ids = d.entityIds
-                           .filter(function(e) { return _entityIDs.indexOf(e) === -1; });
-
-                       utilHighlightEntities(ids, true, context);
-                   })
-                   .on('mouseout.highlight', function(d) {
-                       var ids = d.entityIds
-                           .filter(function(e) { return _entityIDs.indexOf(e) === -1; });
-
-                       utilHighlightEntities(ids, false, context);
-                   });
+       var CORRECT_IS_REGEXP_LOGIC$1 = correctIsRegExpLogic$1('startsWith');
+       // https://github.com/zloirock/core-js/pull/702
+       var MDN_POLYFILL_BUG$1 = !CORRECT_IS_REGEXP_LOGIC$1 && !!function () {
+         var descriptor = getOwnPropertyDescriptor$1(String.prototype, 'startsWith');
+         return descriptor && !descriptor.writable;
+       }();

 
 

-               var labelsEnter = itemsEnter
-                   .append('div')
-                   .attr('class', 'issue-label')
-                   .on('click', function(d) {
+       // `String.prototype.startsWith` method
+       // https://tc39.es/ecma262/#sec-string.prototype.startswith
+       $$1({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG$1 && !CORRECT_IS_REGEXP_LOGIC$1 }, {
+         startsWith: function startsWith(searchString /* , position = 0 */) {
+           var that = String(requireObjectCoercible$1(this));
+           notARegExp$1(searchString);
+           var index = toLength$1(min$1(arguments.length > 1 ? arguments[1] : undefined, that.length));
+           var search = String(searchString);
+           return $startsWith
+             ? $startsWith.call(that, search, index)
+             : that.slice(index, index + search.length) === search;
+         }
+       });

 
 

-                       makeActiveIssue(d.id); // expand only the clicked item
+       function uiSectionEntityIssues(context) {
+         // Does the user prefer to expand the active issue?  Useful for viewing tag diff.
+         // Expand by default so first timers see it - #6408, #8143
+         var preference = corePreferences('entity-issues.reference.expanded');

 
 

-                       var extent = d.extent(context.graph());
-                       if (extent) {
-                           var setZoom = Math.max(context.map().zoom(), 19);
-                           context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
-                       }
-                   });
+         var _expanded = preference === null ? true : preference === 'true';

 
 

-               var textEnter = labelsEnter
-                   .append('span')
-                   .attr('class', 'issue-text');
-
-               textEnter
-                   .append('span')
-                   .attr('class', 'issue-icon')
-                   .each(function(d) {
-                       var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
-                       select(this)
-                           .call(svgIcon(iconName));
-                   });
+         var _entityIDs = [];
+         var _issues = [];

 
 

-               textEnter
-                   .append('span')
-                   .attr('class', 'issue-message');
-
-
-               var infoButton = labelsEnter
-                   .append('button')
-                   .attr('class', 'issue-info-button')
-                   .attr('title', _t('icons.information'))
-                   .attr('tabindex', -1)
-                   .call(svgIcon('#iD-icon-inspect'));
-
-               infoButton
-                   .on('click', function () {
-                       event.stopPropagation();
-                       event.preventDefault();
-                       this.blur();    // avoid keeping focus on the button - #4641
-
-                       var container = select(this.parentNode.parentNode.parentNode);
-                       var info = container.selectAll('.issue-info');
-                       var isExpanded = info.classed('expanded');
-
-                       if (isExpanded) {
-                           info
-                               .transition()
-                               .duration(200)
-                               .style('max-height', '0px')
-                               .style('opacity', '0')
-                               .on('end', function () {
-                                   info.classed('expanded', false);
-                               });
-                       } else {
-                           info
-                               .classed('expanded', true)
-                               .transition()
-                               .duration(200)
-                               .style('max-height', '200px')
-                               .style('opacity', '1')
-                               .on('end', function () {
-                                   info.style('max-height', null);
-                               });
-                       }
-                   });
+         var _activeIssueID;

 
 

-               itemsEnter
-                   .append('ul')
-                   .attr('class', 'issue-fix-list');
+         var section = uiSection('entity-issues', context).shouldDisplay(function () {
+           return _issues.length > 0;
+         }).label(function () {
+           return _t('inspector.title_count', {
+             title: _t.html('issues.list_title'),
+             count: _issues.length
+           });
+         }).disclosureContent(renderDisclosureContent);
+         context.validator().on('validated.entity_issues', function () {
+           // Refresh on validated events
+           reloadIssues();
+           section.reRender();
+         }).on('focusedIssue.entity_issues', function (issue) {
+           makeActiveIssue(issue.id);
+         });

 
 

-               containersEnter
-                   .append('div')
-                   .attr('class', 'issue-info')
-                   .style('max-height', '0')
-                   .style('opacity', '0')
-                   .each(function(d) {
-                       if (typeof d.reference === 'function') {
-                           select(this)
-                               .call(d.reference);
-                       } else {
-                           select(this)
-                               .text(_t('inspector.no_documentation_key'));
-                       }
-                   });
+         function reloadIssues() {
+           _issues = context.validator().getSharedEntityIssues(_entityIDs, {
+             includeDisabledRules: true
+           });
+         }

 
 

+         function makeActiveIssue(issueID) {
+           _activeIssueID = issueID;
+           section.selection().selectAll('.issue-container').classed('active', function (d) {
+             return d.id === _activeIssueID;
+           });
+         }

 
 

-               // Update
-               containers = containers
-                   .merge(containersEnter)
-                   .classed('active', function(d) { return d.id === _activeIssueID; });
+         function renderDisclosureContent(selection) {
+           selection.classed('grouped-items-area', true);
+           _activeIssueID = _issues.length > 0 ? _issues[0].id : null;
+           var containers = selection.selectAll('.issue-container').data(_issues, function (d) {
+             return d.key;
+           }); // Exit

 
 

-               containers.selectAll('.issue-message')
-                   .text(function(d) {
-                       return d.message(context);
-                   });
+           containers.exit().remove(); // Enter

 
 

-               // fixes
-               var fixLists = containers.selectAll('.issue-fix-list');
+           var containersEnter = containers.enter().append('div').attr('class', 'issue-container');
+           var itemsEnter = containersEnter.append('div').attr('class', function (d) {
+             return 'issue severity-' + d.severity;
+           }).on('mouseover.highlight', function (d3_event, d) {
+             // don't hover-highlight the selected entity
+             var ids = d.entityIds.filter(function (e) {
+               return _entityIDs.indexOf(e) === -1;
+             });
+             utilHighlightEntities(ids, true, context);
+           }).on('mouseout.highlight', function (d3_event, d) {
+             var ids = d.entityIds.filter(function (e) {
+               return _entityIDs.indexOf(e) === -1;
+             });
+             utilHighlightEntities(ids, false, context);
+           });
+           var labelsEnter = itemsEnter.append('div').attr('class', 'issue-label');
+           var textEnter = labelsEnter.append('button').attr('class', 'issue-text').on('click', function (d3_event, d) {
+             makeActiveIssue(d.id); // expand only the clicked item

 
 

-               var fixes = fixLists.selectAll('.issue-fix-item')
-                   .data(function(d) { return d.fixes ? d.fixes(context) : []; }, function(fix) { return fix.id; });
+             var extent = d.extent(context.graph());

 
 

-               fixes.exit()
-                   .remove();
+             if (extent) {
+               var setZoom = Math.max(context.map().zoom(), 19);
+               context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
+             }
+           });
+           textEnter.each(function (d) {
+             var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
+             select(this).call(svgIcon(iconName, 'issue-icon'));
+           });
+           textEnter.append('span').attr('class', 'issue-message');
+           var infoButton = labelsEnter.append('button').attr('class', 'issue-info-button').attr('title', _t('icons.information')).call(svgIcon('#iD-icon-inspect'));
+           infoButton.on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             this.blur(); // avoid keeping focus on the button - #4641
+
+             var container = select(this.parentNode.parentNode.parentNode);
+             var info = container.selectAll('.issue-info');
+             var isExpanded = info.classed('expanded');
+             _expanded = !isExpanded;
+             corePreferences('entity-issues.reference.expanded', _expanded); // update preference
+
+             if (isExpanded) {
+               info.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+                 info.classed('expanded', false);
+               });
+             } else {
+               info.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1').on('end', function () {
+                 info.style('max-height', null);
+               });
+             }
+           });
+           itemsEnter.append('ul').attr('class', 'issue-fix-list');
+           containersEnter.append('div').attr('class', 'issue-info' + (_expanded ? ' expanded' : '')).style('max-height', _expanded ? null : '0').style('opacity', _expanded ? '1' : '0').each(function (d) {
+             if (typeof d.reference === 'function') {
+               select(this).call(d.reference);
+             } else {
+               select(this).html(_t.html('inspector.no_documentation_key'));
+             }
+           }); // Update

 
 

-               var fixesEnter = fixes.enter()
-                   .append('li')
-                   .attr('class', 'issue-fix-item')
-                   .on('click', function(d) {
-                       // not all fixes are actionable
-                       if (!select(this).classed('actionable') || !d.onClick) { return; }
+           containers = containers.merge(containersEnter).classed('active', function (d) {
+             return d.id === _activeIssueID;
+           });
+           containers.selectAll('.issue-message').html(function (d) {
+             return d.message(context);
+           }); // fixes
+
+           var fixLists = containers.selectAll('.issue-fix-list');
+           var fixes = fixLists.selectAll('.issue-fix-item').data(function (d) {
+             return d.fixes ? d.fixes(context) : [];
+           }, function (fix) {
+             return fix.id;
+           });
+           fixes.exit().remove();
+           var fixesEnter = fixes.enter().append('li').attr('class', 'issue-fix-item');
+           var buttons = fixesEnter.append('button').on('click', function (d3_event, d) {
+             // not all fixes are actionable
+             if (select(this).attr('disabled') || !d.onClick) return; // Don't run another fix for this issue within a second of running one
+             // (Necessary for "Select a feature type" fix. Most fixes should only ever run once)
+
+             if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) return;
+             d.issue.dateLastRanFix = new Date(); // remove hover-highlighting
+
+             utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
+             new Promise(function (resolve, reject) {
+               d.onClick(context, resolve, reject);
+
+               if (d.onClick.length <= 1) {
+                 // if the fix doesn't take any completion parameters then consider it resolved
+                 resolve();
+               }
+             }).then(function () {
+               // revalidate whenever the fix has finished running successfully
+               context.validator().validate();
+             });
+           }).on('mouseover.highlight', function (d3_event, d) {
+             utilHighlightEntities(d.entityIds, true, context);
+           }).on('mouseout.highlight', function (d3_event, d) {
+             utilHighlightEntities(d.entityIds, false, context);
+           });
+           buttons.each(function (d) {
+             var iconName = d.icon || 'iD-icon-wrench';

 
 

-                       // Don't run another fix for this issue within a second of running one
-                       // (Necessary for "Select a feature type" fix. Most fixes should only ever run once)
-                       if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) { return; }
-                       d.issue.dateLastRanFix = new Date();
+             if (iconName.startsWith('maki')) {
+               iconName += '-15';
+             }

 
 

-                       // remove hover-highlighting
-                       utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
+             select(this).call(svgIcon('#' + iconName, 'fix-icon'));
+           });
+           buttons.append('span').attr('class', 'fix-message').html(function (d) {
+             return d.title;
+           });
+           fixesEnter.merge(fixes).selectAll('button').classed('actionable', function (d) {
+             return d.onClick;
+           }).attr('disabled', function (d) {
+             return d.onClick ? null : 'true';
+           }).attr('title', function (d) {
+             if (d.disabledReason) {
+               return d.disabledReason;
+             }

 
 

-                       new Promise(function(resolve, reject) {
-                           d.onClick(context, resolve, reject);
-                           if (d.onClick.length <= 1) {
-                               // if the fix doesn't take any completion parameters then consider it resolved
-                               resolve();
-                           }
-                       })
-                       .then(function() {
-                           // revalidate whenever the fix has finished running successfully
-                           context.validator().validate();
-                       });
-                   })
-                   .on('mouseover.highlight', function(d) {
-                       utilHighlightEntities(d.entityIds, true, context);
-                   })
-                   .on('mouseout.highlight', function(d) {
-                       utilHighlightEntities(d.entityIds, false, context);
-                   });
+             return null;
+           });
+         }

 
 

-               fixesEnter
-                   .append('span')
-                   .attr('class', 'fix-icon')
-                   .each(function(d) {
-                       var iconName = d.icon || 'iD-icon-wrench';
-                       if (iconName.startsWith('maki')) {
-                           iconName += '-15';
-                       }
-                       select(this).call(svgIcon('#' + iconName));
-                   });
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;

 
 

-               fixesEnter
-                   .append('span')
-                   .attr('class', 'fix-message')
-                   .text(function(d) { return d.title; });
-
-               fixesEnter.merge(fixes)
-                   .classed('actionable', function(d) {
-                       return d.onClick;
-                   })
-                   .attr('title', function(d) {
-                       if (d.disabledReason) {
-                           return d.disabledReason;
-                       }
-                       return null;
-                   });
+           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+             _entityIDs = val;
+             _activeIssueID = null;
+             reloadIssues();

            }
 
            }
 

-           section.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-                   _entityIDs = val;
-                   _activeIssueID = null;
-                   reloadIssues();
-               }
-               return section;
-           };
-

            return section;
            return section;

+         };
+
+         return section;

        }
 
        function uiPresetIcon() {
          var _preset;
        }
 
        function uiPresetIcon() {
          var _preset;

+

          var _geometry;
          var _geometry;

-         var _sizeClass = 'medium';

 
 

+         var _sizeClass = 'medium';

 
          function isSmall() {
            return _sizeClass === 'small';
          }
 
 
          function isSmall() {
            return _sizeClass === 'small';
          }
 

-

          function presetIcon(selection) {
            selection.each(render);
          }
 
          function presetIcon(selection) {
            selection.each(render);
          }
 

-

          function getIcon(p, geom) {
          function getIcon(p, geom) {

-           if (isSmall() && p.isFallback && p.isFallback())
-             { return 'iD-icon-' + p.id; }
-           else if (p.icon)
-             { return p.icon; }
-           else if (geom === 'line')
-             { return 'iD-other-line'; }
-           else if (geom === 'vertex')
-             { return p.isFallback() ? '' : 'temaki-vertex'; }
-           else if (isSmall() && geom === 'point')
-             { return ''; }
-           else
-             { return 'maki-marker-stroked'; }
-         }
-
-
-         function renderPointBorder(enter) {
+           if (isSmall() && p.isFallback && p.isFallback()) return 'iD-icon-' + p.id;
+           if (p.icon) return p.icon;
+           if (geom === 'line') return 'iD-other-line';
+           if (geom === 'vertex') return p.isFallback() ? '' : 'temaki-vertex';
+           if (isSmall() && geom === 'point') return '';
+           return 'maki-marker-stroked';
+         }
+
+         function renderPointBorder(container, drawPoint) {
+           var pointBorder = container.selectAll('.preset-icon-point-border').data(drawPoint ? [0] : []);
+           pointBorder.exit().remove();
+           var pointBorderEnter = pointBorder.enter();

            var w = 40;
            var h = 40;
            var w = 40;
            var h = 40;

-
-           enter
-             .append('svg')
-             .attr('class', 'preset-icon-fill preset-icon-point-border')
-             .attr('width', w)
-             .attr('height', h)
-             .attr('viewBox', ("0 0 " + w + " " + h))
-             .append('path')
-             .attr('transform', 'translate(11.5, 8)')
-             .attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+           pointBorderEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-point-border').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('path').attr('transform', 'translate(11.5, 8)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+           pointBorder = pointBorderEnter.merge(pointBorder);

          }
 
          }
 

+         function renderCategoryBorder(container, category) {
+           var categoryBorder = container.selectAll('.preset-icon-category-border').data(category ? [0] : []);
+           categoryBorder.exit().remove();
+           var categoryBorderEnter = categoryBorder.enter();
+           var d = 60;
+           var svgEnter = categoryBorderEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-category-border').attr('width', d).attr('height', d).attr('viewBox', "0 0 ".concat(d, " ").concat(d));
+           ['fill', 'stroke'].forEach(function (klass) {
+             svgEnter.append('path').attr('class', "area ".concat(klass)).attr('d', 'M9.5,7.5 L25.5,7.5 L28.5,12.5 L49.5,12.5 C51.709139,12.5 53.5,14.290861 53.5,16.5 L53.5,43.5 C53.5,45.709139 51.709139,47.5 49.5,47.5 L10.5,47.5 C8.290861,47.5 6.5,45.709139 6.5,43.5 L6.5,12.5 L9.5,7.5 Z');
+           });
+           categoryBorder = categoryBorderEnter.merge(categoryBorder);
+
+           if (category) {
+             var tagClasses = svgTagClasses().getClassesString(category.members.collection[0].addTags, '');
+             categoryBorder.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
+             categoryBorder.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));
+           }
+         }

 
 

-         function renderCircleFill(fillEnter) {
+         function renderCircleFill(container, drawVertex) {
+           var vertexFill = container.selectAll('.preset-icon-fill-vertex').data(drawVertex ? [0] : []);
+           vertexFill.exit().remove();
+           var vertexFillEnter = vertexFill.enter();

            var w = 60;
            var h = 60;
            var d = 40;
            var w = 60;
            var h = 60;
            var d = 40;

-
-           fillEnter
-             .append('svg')
-             .attr('class', 'preset-icon-fill preset-icon-fill-vertex')
-             .attr('width', w)
-             .attr('height', h)
-             .attr('viewBox', ("0 0 " + w + " " + h))
-             .append('circle')
-             .attr('cx', w / 2)
-             .attr('cy', h / 2)
-             .attr('r', d / 2);
+           vertexFillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-vertex').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('circle').attr('cx', w / 2).attr('cy', h / 2).attr('r', d / 2);
+           vertexFill = vertexFillEnter.merge(vertexFill);

          }
 
          }
 

-
-         function renderSquareFill(fillEnter) {
+         function renderSquareFill(container, drawArea, tagClasses) {
+           var fill = container.selectAll('.preset-icon-fill-area').data(drawArea ? [0] : []);
+           fill.exit().remove();
+           var fillEnter = fill.enter();

            var d = isSmall() ? 40 : 60;
            var w = d;
            var h = d;
            var d = isSmall() ? 40 : 60;
            var w = d;
            var h = d;

-           var l = d * 2/3;
-           var c1 = (w-l) / 2;
+           var l = d * 2 / 3;
+           var c1 = (w - l) / 2;

            var c2 = c1 + l;
            var c2 = c1 + l;

-
-           fillEnter = fillEnter
-             .append('svg')
-             .attr('class', 'preset-icon-fill preset-icon-fill-area')
-             .attr('width', w)
-             .attr('height', h)
-             .attr('viewBox', ("0 0 " + w + " " + h));
-
+           fillEnter = fillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-area').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));

            ['fill', 'stroke'].forEach(function (klass) {
            ['fill', 'stroke'].forEach(function (klass) {

-             fillEnter
-               .append('path')
-               .attr('d', ("M" + c1 + " " + c1 + " L" + c1 + " " + c2 + " L" + c2 + " " + c2 + " L" + c2 + " " + c1 + " Z"))
-               .attr('class', ("line area " + klass));
+             fillEnter.append('path').attr('d', "M".concat(c1, " ").concat(c1, " L").concat(c1, " ").concat(c2, " L").concat(c2, " ").concat(c2, " L").concat(c2, " ").concat(c1, " Z")).attr('class', "area ".concat(klass));

            });
            });

-

            var rVertex = 2.5;
            [[c1, c1], [c1, c2], [c2, c2], [c2, c1]].forEach(function (point) {
            var rVertex = 2.5;
            [[c1, c1], [c1, c2], [c2, c2], [c2, c1]].forEach(function (point) {

-             fillEnter
-               .append('circle')
-               .attr('class', 'vertex')
-               .attr('cx', point[0])
-               .attr('cy', point[1])
-               .attr('r', rVertex);
+             fillEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', rVertex);

            });
 
            if (!isSmall()) {
              var rMidpoint = 1.25;
            });
 
            if (!isSmall()) {
              var rMidpoint = 1.25;

-             [[c1, w/2], [c2, w/2], [h/2, c1], [h/2, c2]].forEach(function (point) {
-               fillEnter
-                 .append('circle')
-                 .attr('class', 'midpoint')
-                 .attr('cx', point[0])
-                 .attr('cy', point[1])
-                 .attr('r', rMidpoint);
+             [[c1, w / 2], [c2, w / 2], [h / 2, c1], [h / 2, c2]].forEach(function (point) {
+               fillEnter.append('circle').attr('class', 'midpoint').attr('cx', point[0]).attr('cy', point[1]).attr('r', rMidpoint);

              });
            }
              });
            }

+
+           fill = fillEnter.merge(fill);
+           fill.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
+           fill.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));

          }
 
          }
 

+         function renderLine(container, drawLine, tagClasses) {
+           var line = container.selectAll('.preset-icon-line').data(drawLine ? [0] : []);
+           line.exit().remove();
+           var lineEnter = line.enter();
+           var d = isSmall() ? 40 : 60; // draw the line parametrically

 
 

-         function renderLine(lineEnter) {
-           var d = isSmall() ? 40 : 60;
-           // draw the line parametrically

            var w = d;
            var h = d;
            var y = Math.round(d * 0.72);
            var w = d;
            var h = d;
            var y = Math.round(d * 0.72);


@@ -82860,35 +78627,24 @@
            var r = 2.5;
            var x1 = (w - l) / 2;
            var x2 = x1 + l;
            var r = 2.5;
            var x1 = (w - l) / 2;
            var x2 = x1 + l;

-
-           lineEnter = lineEnter
-             .append('svg')
-             .attr('class', 'preset-icon-line')
-             .attr('width', w)
-             .attr('height', h)
-             .attr('viewBox', ("0 0 " + w + " " + h));
-
+           lineEnter = lineEnter.append('svg').attr('class', 'preset-icon-line').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));

            ['casing', 'stroke'].forEach(function (klass) {
            ['casing', 'stroke'].forEach(function (klass) {

-             lineEnter
-               .append('path')
-               .attr('d', ("M" + x1 + " " + y + " L" + x2 + " " + y))
-               .attr('class', ("line " + klass));
+             lineEnter.append('path').attr('d', "M".concat(x1, " ").concat(y, " L").concat(x2, " ").concat(y)).attr('class', "line ".concat(klass));

            });
            });

-
-           [[x1-1, y], [x2+1, y]].forEach(function (point) {
-             lineEnter
-               .append('circle')
-               .attr('class', 'vertex')
-               .attr('cx', point[0])
-               .attr('cy', point[1])
-               .attr('r', r);
+           [[x1 - 1, y], [x2 + 1, y]].forEach(function (point) {
+             lineEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);

            });
            });

+           line = lineEnter.merge(line);
+           line.selectAll('path.stroke').attr('class', "line stroke ".concat(tagClasses));
+           line.selectAll('path.casing').attr('class', "line casing ".concat(tagClasses));

          }
 
          }
 

+         function renderRoute(container, drawRoute, p) {
+           var route = container.selectAll('.preset-icon-route').data(drawRoute ? [0] : []);
+           route.exit().remove();
+           var routeEnter = route.enter();
+           var d = isSmall() ? 40 : 60; // draw the route parametrically

 
 

-         function renderRoute(routeEnter) {
-           var d = isSmall() ? 40 : 60;
-           // draw the route parametrically

            var w = d;
            var h = d;
            var y1 = Math.round(d * 0.80);
            var w = d;
            var h = d;
            var y1 = Math.round(d * 0.80);


@@ -82899,45 +78655,65 @@
            var x2 = x1 + l / 3;
            var x3 = x2 + l / 3;
            var x4 = x3 + l / 3;
            var x2 = x1 + l / 3;
            var x3 = x2 + l / 3;
            var x4 = x3 + l / 3;

-
-           routeEnter = routeEnter
-             .append('svg')
-             .attr('class', 'preset-icon-route')
-             .attr('width', w)
-             .attr('height', h)
-             .attr('viewBox', ("0 0 " + w + " " + h));
-
+           routeEnter = routeEnter.append('svg').attr('class', 'preset-icon-route').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));

            ['casing', 'stroke'].forEach(function (klass) {
            ['casing', 'stroke'].forEach(function (klass) {

-             routeEnter
-               .append('path')
-               .attr('d', ("M" + x1 + " " + y1 + " L" + x2 + " " + y2))
-               .attr('class', ("segment0 line " + klass));
-             routeEnter
-               .append('path')
-               .attr('d', ("M" + x2 + " " + y2 + " L" + x3 + " " + y1))
-               .attr('class', ("segment1 line " + klass));
-             routeEnter
-               .append('path')
-               .attr('d', ("M" + x3 + " " + y1 + " L" + x4 + " " + y2))
-               .attr('class', ("segment2 line " + klass));
+             routeEnter.append('path').attr('d', "M".concat(x1, " ").concat(y1, " L").concat(x2, " ").concat(y2)).attr('class', "segment0 line ".concat(klass));
+             routeEnter.append('path').attr('d', "M".concat(x2, " ").concat(y2, " L").concat(x3, " ").concat(y1)).attr('class', "segment1 line ".concat(klass));
+             routeEnter.append('path').attr('d', "M".concat(x3, " ").concat(y1, " L").concat(x4, " ").concat(y2)).attr('class', "segment2 line ".concat(klass));

            });
            });

-

            [[x1, y1], [x2, y2], [x3, y1], [x4, y2]].forEach(function (point) {
            [[x1, y1], [x2, y2], [x3, y1], [x4, y2]].forEach(function (point) {

-             routeEnter
-               .append('circle')
-               .attr('class', 'vertex')
-               .attr('cx', point[0])
-               .attr('cy', point[1])
-               .attr('r', r);
+             routeEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);

            });
            });

-         }
+           route = routeEnter.merge(route);
+
+           if (drawRoute) {
+             var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
+             var segmentPresetIDs = routeSegments[routeType];

 
 

+             for (var i in segmentPresetIDs) {
+               var segmentPreset = _mainPresetIndex.item(segmentPresetIDs[i]);
+               var segmentTagClasses = svgTagClasses().getClassesString(segmentPreset.tags, '');
+               route.selectAll("path.stroke.segment".concat(i)).attr('class', "segment".concat(i, " line stroke ").concat(segmentTagClasses));
+               route.selectAll("path.casing.segment".concat(i)).attr('class', "segment".concat(i, " line casing ").concat(segmentTagClasses));
+             }
+           }
+         }

 
 

-         // Route icons are drawn with a zigzag annotation underneath:
+         function renderSvgIcon(container, picon, geom, isFramed, category, tagClasses) {
+           var isMaki = picon && /^maki-/.test(picon);
+           var isTemaki = picon && /^temaki-/.test(picon);
+           var isFa = picon && /^fa[srb]-/.test(picon);
+           var isiDIcon = picon && !(isMaki || isTemaki || isFa);
+           var icon = container.selectAll('.preset-icon').data(picon ? [0] : []);
+           icon.exit().remove();
+           icon = icon.enter().append('div').attr('class', 'preset-icon').call(svgIcon('')).merge(icon);
+           icon.attr('class', 'preset-icon ' + (geom ? geom + '-geom' : '')).classed('category', category).classed('framed', isFramed).classed('preset-icon-iD', isiDIcon);
+           icon.selectAll('svg').attr('class', 'icon ' + picon + ' ' + (!isiDIcon && geom !== 'line' ? '' : tagClasses));
+           var suffix = '';
+
+           if (isMaki) {
+             suffix = isSmall() && geom === 'point' ? '-11' : '-15';
+           }
+
+           icon.selectAll('use').attr('href', '#' + picon + suffix);
+         }
+
+         function renderImageIcon(container, imageURL) {
+           var imageIcon = container.selectAll('img.image-icon').data(imageURL ? [0] : []);
+           imageIcon.exit().remove();
+           imageIcon = imageIcon.enter().append('img').attr('class', 'image-icon').on('load', function () {
+             return container.classed('showing-img', true);
+           }).on('error', function () {
+             return container.classed('showing-img', false);
+           }).merge(imageIcon);
+           imageIcon.attr('src', imageURL);
+         } // Route icons are drawn with a zigzag annotation underneath:

          //     o   o
          //    / \ /
          //   o   o
          // This dataset defines the styles that are used to draw the zigzag segments.
          //     o   o
          //    / \ /
          //   o   o
          // This dataset defines the styles that are used to draw the zigzag segments.

+
+

          var routeSegments = {
            bicycle: ['highway/cycleway', 'highway/cycleway', 'highway/cycleway'],
            bus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
          var routeSegments = {
            bicycle: ['highway/cycleway', 'highway/cycleway', 'highway/cycleway'],
            bus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],


@@ -82949,6 +78725,7 @@
            horse: ['highway/bridleway', 'highway/bridleway', 'highway/bridleway'],
            light_rail: ['railway/light_rail', 'railway/light_rail', 'railway/light_rail'],
            monorail: ['railway/monorail', 'railway/monorail', 'railway/monorail'],
            horse: ['highway/bridleway', 'highway/bridleway', 'highway/bridleway'],
            light_rail: ['railway/light_rail', 'railway/light_rail', 'railway/light_rail'],
            monorail: ['railway/monorail', 'railway/monorail', 'railway/monorail'],

+           mtb: ['highway/path', 'highway/track', 'highway/bridleway'],

            pipeline: ['man_made/pipeline', 'man_made/pipeline', 'man_made/pipeline'],
            piste: ['piste/downhill', 'piste/hike', 'piste/nordic'],
            power: ['power/line', 'power/line', 'power/line'],
            pipeline: ['man_made/pipeline', 'man_made/pipeline', 'man_made/pipeline'],
            piste: ['piste/downhill', 'piste/hike', 'piste/nordic'],
            power: ['power/line', 'power/line', 'power/line'],


@@ -82959,32 +78736,28 @@
            waterway: ['waterway/stream', 'waterway/stream', 'waterway/stream']
          };
 
            waterway: ['waterway/stream', 'waterway/stream', 'waterway/stream']
          };
 

-

          function render() {
            var p = _preset.apply(this, arguments);
          function render() {
            var p = _preset.apply(this, arguments);

+

            var geom = _geometry ? _geometry.apply(this, arguments) : null;
            var geom = _geometry ? _geometry.apply(this, arguments) : null;

-           if (geom === 'relation' && p.tags && ((p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route]) || p.tags.type === 'waterway')) {
+
+           if (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {

              geom = 'route';
            }
 
            var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
            var isFallback = isSmall() && p.isFallback && p.isFallback();
              geom = 'route';
            }
 
            var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
            var isFallback = isSmall() && p.isFallback && p.isFallback();

-           var imageURL = (showThirdPartyIcons === 'true') && p.imageURL;
+           var imageURL = showThirdPartyIcons === 'true' && p.imageURL;

            var picon = getIcon(p, geom);
            var picon = getIcon(p, geom);

-           var isMaki = picon && /^maki-/.test(picon);
-           var isTemaki = picon && /^temaki-/.test(picon);
-           var isFa = picon && /^fa[srb]-/.test(picon);
-           var isTnp = picon && /^tnp-/.test(picon);
-           var isiDIcon = picon && !(isMaki || isTemaki || isFa || isTnp);

            var isCategory = !p.setTags;
            var drawPoint = picon && geom === 'point' && isSmall() && !isFallback;
            var drawVertex = picon !== null && geom === 'vertex' && (!isSmall() || !isFallback);
            var drawLine = picon && geom === 'line' && !isFallback && !isCategory;
            var isCategory = !p.setTags;
            var drawPoint = picon && geom === 'point' && isSmall() && !isFallback;
            var drawVertex = picon !== null && geom === 'vertex' && (!isSmall() || !isFallback);
            var drawLine = picon && geom === 'line' && !isFallback && !isCategory;

-           var drawArea = picon && geom === 'area' && !isFallback;
+           var drawArea = picon && geom === 'area' && !isFallback && !isCategory;

            var drawRoute = picon && geom === 'route';
            var drawRoute = picon && geom === 'route';

-           var isFramed = (drawVertex || drawArea || drawLine || drawRoute);
-
+           var isFramed = drawVertex || drawArea || drawLine || drawRoute || isCategory;

            var tags = !isCategory ? p.setTags({}, geom) : {};
            var tags = !isCategory ? p.setTags({}, geom) : {};

+

            for (var k in tags) {
              if (tags[k] === '*') {
                tags[k] = 'yes';
            for (var k in tags) {
              if (tags[k] === '*') {
                tags[k] = 'yes';


@@ -82993,35571 +78766,24694 @@
 
            var tagClasses = svgTagClasses().getClassesString(tags, '');
            var selection = select(this);
 
            var tagClasses = svgTagClasses().getClassesString(tags, '');
            var selection = select(this);

+           var container = selection.selectAll('.preset-icon-container').data([0]);
+           container = container.enter().append('div').attr('class', "preset-icon-container ".concat(_sizeClass)).merge(container);
+           container.classed('showing-img', !!imageURL).classed('fallback', isFallback);
+           renderCategoryBorder(container, isCategory && p);
+           renderPointBorder(container, drawPoint);
+           renderCircleFill(container, drawVertex);
+           renderSquareFill(container, drawArea, tagClasses);
+           renderLine(container, drawLine, tagClasses);
+           renderRoute(container, drawRoute, p);
+           renderSvgIcon(container, picon, geom, isFramed, isCategory, tagClasses);
+           renderImageIcon(container, imageURL);
+         }
+
+         presetIcon.preset = function (val) {
+           if (!arguments.length) return _preset;
+           _preset = utilFunctor(val);
+           return presetIcon;
+         };

 
 

-           var container = selection.selectAll('.preset-icon-container')
-             .data([0]);
-
-           container = container.enter()
-             .append('div')
-             .attr('class', ("preset-icon-container " + _sizeClass))
-             .merge(container);
-
-           container
-             .classed('showing-img', !!imageURL)
-             .classed('fallback', isFallback);
-
-
-           var pointBorder = container.selectAll('.preset-icon-point-border')
-             .data(drawPoint ? [0] : []);
-
-           pointBorder.exit()
-             .remove();
-
-           var pointBorderEnter = pointBorder.enter();
-           renderPointBorder(pointBorderEnter);
-           pointBorder = pointBorderEnter.merge(pointBorder);
+         presetIcon.geometry = function (val) {
+           if (!arguments.length) return _geometry;
+           _geometry = utilFunctor(val);
+           return presetIcon;
+         };

 
 

+         presetIcon.sizeClass = function (val) {
+           if (!arguments.length) return _sizeClass;
+           _sizeClass = val;
+           return presetIcon;
+         };

 
 

-           var vertexFill = container.selectAll('.preset-icon-fill-vertex')
-             .data(drawVertex ? [0] : []);
+         return presetIcon;
+       }

 
 

-           vertexFill.exit()
-             .remove();
+       function uiSectionFeatureType(context) {
+         var dispatch = dispatch$8('choose');
+         var _entityIDs = [];
+         var _presets = [];
+
+         var _tagReference;
+
+         var section = uiSection('feature-type', context).label(_t.html('inspector.feature_type')).disclosureContent(renderDisclosureContent);
+
+         function renderDisclosureContent(selection) {
+           selection.classed('preset-list-item', true);
+           selection.classed('mixed-types', _presets.length > 1);
+           var presetButtonWrap = selection.selectAll('.preset-list-button-wrap').data([0]).enter().append('div').attr('class', 'preset-list-button-wrap');
+           var presetButton = presetButtonWrap.append('button').attr('class', 'preset-list-button preset-reset').call(uiTooltip().title(_t.html('inspector.back_tooltip')).placement('bottom'));
+           presetButton.append('div').attr('class', 'preset-icon-container');
+           presetButton.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+           presetButtonWrap.append('div').attr('class', 'accessory-buttons');
+           var tagReferenceBodyWrap = selection.selectAll('.tag-reference-body-wrap').data([0]);
+           tagReferenceBodyWrap = tagReferenceBodyWrap.enter().append('div').attr('class', 'tag-reference-body-wrap').merge(tagReferenceBodyWrap); // update header
+
+           if (_tagReference) {
+             selection.selectAll('.preset-list-button-wrap .accessory-buttons').style('display', _presets.length === 1 ? null : 'none').call(_tagReference.button);
+             tagReferenceBodyWrap.style('display', _presets.length === 1 ? null : 'none').call(_tagReference.body);
+           }
+
+           selection.selectAll('.preset-reset').on('click', function () {
+             dispatch.call('choose', this, _presets);
+           }).on('pointerdown pointerup mousedown mouseup', function (d3_event) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+           });
+           var geometries = entityGeometries();
+           selection.select('.preset-list-item button').call(uiPresetIcon().geometry(_presets.length === 1 ? geometries.length === 1 && geometries[0] : null).preset(_presets.length === 1 ? _presets[0] : _mainPresetIndex.item('point')));
+           var names = _presets.length === 1 ? [_presets[0].nameLabel(), _presets[0].subtitleLabel()].filter(Boolean) : [_t('inspector.multiple_types')];
+           var label = selection.select('.label-inner');
+           var nameparts = label.selectAll('.namepart').data(names, function (d) {
+             return d;
+           });
+           nameparts.exit().remove();
+           nameparts.enter().append('div').attr('class', 'namepart').html(function (d) {
+             return d;
+           });
+         }

 
 

-           var vertexFillEnter = vertexFill.enter();
-           renderCircleFill(vertexFillEnter);
-           vertexFill = vertexFillEnter.merge(vertexFill);
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return section;
+         };

 
 

+         section.presets = function (val) {
+           if (!arguments.length) return _presets; // don't reload the same preset

 
 

-           var fill = container.selectAll('.preset-icon-fill-area')
-             .data(drawArea ? [0] : []);
+           if (!utilArrayIdentical(val, _presets)) {
+             _presets = val;

 
 

-           fill.exit()
-             .remove();
+             if (_presets.length === 1) {
+               _tagReference = uiTagReference(_presets[0].reference()).showing(false);
+             }
+           }

 
 

-           var fillEnter = fill.enter();
-           renderSquareFill(fillEnter);
-           fill = fillEnter.merge(fill);
+           return section;
+         };

 
 

-           fill.selectAll('path.stroke')
-             .attr('class', ("area stroke " + tagClasses));
-           fill.selectAll('path.fill')
-             .attr('class', ("area fill " + tagClasses));
+         function entityGeometries() {
+           var counts = {};

 
 

+           for (var i in _entityIDs) {
+             var geometry = context.graph().geometry(_entityIDs[i]);
+             if (!counts[geometry]) counts[geometry] = 0;
+             counts[geometry] += 1;
+           }

 
 

-           var line = container.selectAll('.preset-icon-line')
-             .data(drawLine ? [0] : []);
+           return Object.keys(counts).sort(function (geom1, geom2) {
+             return counts[geom2] - counts[geom1];
+           });
+         }

 
 

-           line.exit()
-             .remove();
+         return utilRebind(section, dispatch, 'on');
+       }

 
 

-           var lineEnter = line.enter();
-           renderLine(lineEnter);
-           line = lineEnter.merge(line);
+       // It borrows some code from uiHelp

 
 

-           line.selectAll('path.stroke')
-             .attr('class', ("line stroke " + tagClasses));
-           line.selectAll('path.casing')
-             .attr('class', ("line casing " + tagClasses));
+       function uiFieldHelp(context, fieldName) {
+         var fieldHelp = {};

 
 

+         var _inspector = select(null);

 
 

-           var route = container.selectAll('.preset-icon-route')
-             .data(drawRoute ? [0] : []);
+         var _wrap = select(null);

 
 

-           route.exit()
-             .remove();
+         var _body = select(null);

 
 

-           var routeEnter = route.enter();
-           renderRoute(routeEnter);
-           route = routeEnter.merge(route);
+         var fieldHelpKeys = {
+           restrictions: [['about', ['about', 'from_via_to', 'maxdist', 'maxvia']], ['inspecting', ['about', 'from_shadow', 'allow_shadow', 'restrict_shadow', 'only_shadow', 'restricted', 'only']], ['modifying', ['about', 'indicators', 'allow_turn', 'restrict_turn', 'only_turn']], ['tips', ['simple', 'simple_example', 'indirect', 'indirect_example', 'indirect_noedit']]]
+         };
+         var fieldHelpHeadings = {};
+         var replacements = {
+           distField: _t.html('restriction.controls.distance'),
+           viaField: _t.html('restriction.controls.via'),
+           fromShadow: icon('#iD-turn-shadow', 'inline shadow from'),
+           allowShadow: icon('#iD-turn-shadow', 'inline shadow allow'),
+           restrictShadow: icon('#iD-turn-shadow', 'inline shadow restrict'),
+           onlyShadow: icon('#iD-turn-shadow', 'inline shadow only'),
+           allowTurn: icon('#iD-turn-yes', 'inline turn'),
+           restrictTurn: icon('#iD-turn-no', 'inline turn'),
+           onlyTurn: icon('#iD-turn-only', 'inline turn')
+         }; // For each section, squash all the texts into a single markdown document

 
 

-           if (drawRoute) {
-             var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
-             var segmentPresetIDs = routeSegments[routeType];
-             for (var i in segmentPresetIDs) {
-               var segmentPreset = _mainPresetIndex.item(segmentPresetIDs[i]);
-               var segmentTagClasses = svgTagClasses().getClassesString(segmentPreset.tags, '');
-               route.selectAll(("path.stroke.segment" + i))
-                 .attr('class', ("segment" + i + " line stroke " + segmentTagClasses));
-               route.selectAll(("path.casing.segment" + i))
-                 .attr('class', ("segment" + i + " line casing " + segmentTagClasses));
-             }
-           }
+         var docs = fieldHelpKeys[fieldName].map(function (key) {
+           var helpkey = 'help.field.' + fieldName + '.' + key[0];
+           var text = key[1].reduce(function (all, part) {
+             var subkey = helpkey + '.' + part;
+             var depth = fieldHelpHeadings[subkey]; // is this subkey a heading?

 
 

+             var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s

 
 

-           var icon = container.selectAll('.preset-icon')
-             .data(picon ? [0] : []);
+             return all + hhh + _t.html(subkey, replacements) + '\n\n';
+           }, '');
+           return {
+             key: helpkey,
+             title: _t.html(helpkey + '.title'),
+             html: marked_1(text.trim())
+           };
+         });

 
 

-           icon.exit()
-             .remove();
+         function show() {
+           updatePosition();

 
 

-           icon = icon.enter()
-             .append('div')
-             .attr('class', 'preset-icon')
-             .call(svgIcon(''))
-             .merge(icon);
+           _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '1');
+         }

 
 

-           icon
-             .attr('class', 'preset-icon ' + (geom ? geom + '-geom' : ''))
-             .classed('framed', isFramed)
-             .classed('preset-icon-iD', isiDIcon);
+         function hide() {
+           _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
+             _body.classed('hide', true);
+           });
+         }

 
 

-           icon.selectAll('svg')
-             .attr('class', 'icon ' + picon + ' ' + (!isiDIcon && geom !== 'line'  ? '' : tagClasses));
+         function clickHelp(index) {
+           var d = docs[index];
+           var tkeys = fieldHelpKeys[fieldName][index][1];

 
 

-           icon.selectAll('use')
-             .attr('href', '#' + picon + (isMaki ? (isSmall() && geom === 'point' ? '-11' : '-15') : ''));
+           _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
+             return i === index;
+           });

 
 

-           var imageIcon = container.selectAll('img.image-icon')
-             .data(imageURL ? [0] : []);
+           var content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them

 
 

-           imageIcon.exit()
-             .remove();

 
 

-           imageIcon = imageIcon.enter()
-             .append('img')
-             .attr('class', 'image-icon')
-             .on('load', function () { return container.classed('showing-img', true); } )
-             .on('error', function () { return container.classed('showing-img', false); } )
-             .merge(imageIcon);
+           content.selectAll('p').attr('class', function (d, i) {
+             return tkeys[i];
+           }); // insert special content for certain help sections

 
 

-           imageIcon
-             .attr('src', imageURL);
+           if (d.key === 'help.field.restrictions.inspecting') {
+             content.insert('img', 'p.from_shadow').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_inspect.gif'));
+           } else if (d.key === 'help.field.restrictions.modifying') {
+             content.insert('img', 'p.allow_turn').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_modify.gif'));
+           }

          }
 
          }
 

+         fieldHelp.button = function (selection) {
+           if (_body.empty()) return;
+           var button = selection.selectAll('.field-help-button').data([0]); // enter/update

 
 

-         presetIcon.preset = function(val) {
-           if (!arguments.length) { return _preset; }
-           _preset = utilFunctor(val);
-           return presetIcon;
-         };
-
-
-         presetIcon.geometry = function(val) {
-           if (!arguments.length) { return _geometry; }
-           _geometry = utilFunctor(val);
-           return presetIcon;
-         };
-
+           button.enter().append('button').attr('class', 'field-help-button').call(svgIcon('#iD-icon-help')).merge(button).on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();

 
 

-         presetIcon.sizeClass = function(val) {
-           if (!arguments.length) { return _sizeClass; }
-           _sizeClass = val;
-           return presetIcon;
+             if (_body.classed('hide')) {
+               show();
+             } else {
+               hide();
+             }
+           });

          };
 
          };
 

-         return presetIcon;
-       }
-
-       function uiSectionFeatureType(context) {
-
-           var dispatch$1 = dispatch('choose');
+         function updatePosition() {
+           var wrap = _wrap.node();

 
 

-           var _entityIDs = [];
-           var _presets = [];
+           var inspector = _inspector.node();

 
 

-           var _tagReference;
+           var wRect = wrap.getBoundingClientRect();
+           var iRect = inspector.getBoundingClientRect();

 
 

-           var section = uiSection('feature-type', context)
-               .title(_t('inspector.feature_type'))
-               .disclosureContent(renderDisclosureContent);
+           _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
+         }

 
 

-           function renderDisclosureContent(selection) {
+         fieldHelp.body = function (selection) {
+           // This control expects the field to have a form-field-input-wrap div
+           _wrap = selection.selectAll('.form-field-input-wrap');
+           if (_wrap.empty()) return; // absolute position relative to the inspector, so it "floats" above the fields

 
 

-               selection.classed('preset-list-item', true);
-               selection.classed('mixed-types', _presets.length > 1);
+           _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
+           if (_inspector.empty()) return;
+           _body = _inspector.selectAll('.field-help-body').data([0]);

 
 

-               var presetButtonWrap = selection
-                   .selectAll('.preset-list-button-wrap')
-                   .data([0])
-                   .enter()
-                   .append('div')
-                   .attr('class', 'preset-list-button-wrap');
+           var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden

 
 

-               var presetButton = presetButtonWrap
-                   .append('button')
-                   .attr('class', 'preset-list-button preset-reset')
-                   .call(uiTooltip()
-                       .title(_t('inspector.back_tooltip'))
-                       .placement('bottom')
-                   );

 
 

-               presetButton.append('div')
-                   .attr('class', 'preset-icon-container');
+           var titleEnter = enter.append('div').attr('class', 'field-help-title cf');
+           titleEnter.append('h2').attr('class', _mainLocalizer.textDirection() === 'rtl' ? 'fr' : 'fl').html(_t.html('help.field.' + fieldName + '.title'));
+           titleEnter.append('button').attr('class', 'fr close').on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             hide();
+           }).call(svgIcon('#iD-icon-close'));
+           var navEnter = enter.append('div').attr('class', 'field-help-nav cf');
+           var titles = docs.map(function (d) {
+             return d.title;
+           });
+           navEnter.selectAll('.field-help-nav-item').data(titles).enter().append('div').attr('class', 'field-help-nav-item').html(function (d) {
+             return d;
+           }).on('click', function (d3_event, d) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             clickHelp(titles.indexOf(d));
+           });
+           enter.append('div').attr('class', 'field-help-content');
+           _body = _body.merge(enter);
+           clickHelp(0);
+         };

 
 

-               presetButton
-                   .append('div')
-                   .attr('class', 'label')
-                   .append('div')
-                   .attr('class', 'label-inner');
+         return fieldHelp;
+       }

 
 

-               presetButtonWrap.append('div')
-                   .attr('class', 'accessory-buttons');
+       function uiFieldCheck(field, context) {
+         var dispatch = dispatch$8('change');
+         var options = field.options;
+         var values = [];
+         var texts = [];

 
 

-               var tagReferenceBodyWrap = selection
-                   .selectAll('.tag-reference-body-wrap')
-                   .data([0]);
+         var _tags;

 
 

-               tagReferenceBodyWrap = tagReferenceBodyWrap
-                   .enter()
-                   .append('div')
-                   .attr('class', 'tag-reference-body-wrap')
-                   .merge(tagReferenceBodyWrap);
-
-               // update header
-               if (_tagReference) {
-                   selection.selectAll('.preset-list-button-wrap .accessory-buttons')
-                       .style('display', _presets.length === 1 ? null : 'none')
-                       .call(_tagReference.button);
-
-                   tagReferenceBodyWrap
-                       .style('display', _presets.length === 1 ? null : 'none')
-                       .call(_tagReference.body);
-               }
-
-               selection.selectAll('.preset-reset')
-                   .on('click', function() {
-                        dispatch$1.call('choose', this, _presets);
-                   })
-                   .on('pointerdown pointerup mousedown mouseup', function() {
-                       event.preventDefault();
-                       event.stopPropagation();
-                   });
+         var input = select(null);
+         var text = select(null);
+         var label = select(null);
+         var reverser = select(null);

 
 

-               var geometries = entityGeometries();
-               selection.select('.preset-list-item button')
-                   .call(uiPresetIcon()
-                       .geometry(_presets.length === 1 ? (geometries.length === 1 && geometries[0]) : null)
-                       .preset(_presets.length === 1 ? _presets[0] : _mainPresetIndex.item('point'))
-                   );
+         var _impliedYes;

 
 

-               // NOTE: split on en-dash, not a hypen (to avoid conflict with hyphenated names)
-               var names = _presets.length === 1 ? _presets[0].name().split(' – ') : [_t('inspector.multiple_types')];
+         var _entityIDs = [];

 
 

-               var label = selection.select('.label-inner');
-               var nameparts = label.selectAll('.namepart')
-                   .data(names, function(d) { return d; });
+         var _value;

 
 

-               nameparts.exit()
-                   .remove();
+         if (options) {
+           for (var i in options) {
+             var v = options[i];
+             values.push(v === 'undefined' ? undefined : v);
+             texts.push(field.t.html('options.' + v, {
+               'default': v
+             }));
+           }
+         } else {
+           values = [undefined, 'yes'];
+           texts = [_t.html('inspector.unknown'), _t.html('inspector.check.yes')];

 
 

-               nameparts
-                   .enter()
-                   .append('div')
-                   .attr('class', 'namepart')
-                   .text(function(d) { return d; });
+           if (field.type !== 'defaultCheck') {
+             values.push('no');
+             texts.push(_t.html('inspector.check.no'));

            }
            }

+         } // Checks tags to see whether an undefined value is "Assumed to be Yes"

 
 

-           section.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               _entityIDs = val;
-               return section;
-           };

 
 

-           section.presets = function(val) {
-               if (!arguments.length) { return _presets; }
+         function checkImpliedYes() {
+           _impliedYes = field.id === 'oneway_yes'; // hack: pretend `oneway` field is a `oneway_yes` field
+           // where implied oneway tag exists (e.g. `junction=roundabout`) #2220, #1841

 
 

-               // don't reload the same preset
-               if (!utilArrayIdentical(val, _presets)) {
-                   _presets = val;
+           if (field.id === 'oneway') {
+             var entity = context.entity(_entityIDs[0]);

 
 

-                   var geometries = entityGeometries();
-                   if (_presets.length === 1 && geometries.length) {
-                       _tagReference = uiTagReference(_presets[0].reference(geometries[0]))
-                           .showing(false);
-                   }
+             for (var key in entity.tags) {
+               if (key in osmOneWayTags && entity.tags[key] in osmOneWayTags[key]) {
+                 _impliedYes = true;
+                 texts[0] = _t.html('_tagging.presets.fields.oneway_yes.options.undefined');
+                 break;

                }
                }

+             }
+           }
+         }

 
 

-               return section;
-           };
-
-           function entityGeometries() {
+         function reverserHidden() {
+           if (!context.container().select('div.inspector-hover').empty()) return true;
+           return !(_value === 'yes' || _impliedYes && !_value);
+         }

 
 

-               var counts = {};
+         function reverserSetText(selection) {
+           var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
+           if (reverserHidden() || !entity) return selection;
+           var first = entity.first();
+           var last = entity.isClosed() ? entity.nodes[entity.nodes.length - 2] : entity.last();
+           var pseudoDirection = first < last;
+           var icon = pseudoDirection ? '#iD-icon-forward' : '#iD-icon-backward';
+           selection.selectAll('.reverser-span').html(_t.html('inspector.check.reverser')).call(svgIcon(icon, 'inline'));
+           return selection;
+         }

 
 

-               for (var i in _entityIDs) {
-                   var geometry = context.graph().geometry(_entityIDs[i]);
-                   if (!counts[geometry]) { counts[geometry] = 0; }
-                   counts[geometry] += 1;
-               }
+         var check = function check(selection) {
+           checkImpliedYes();
+           label = selection.selectAll('.form-field-input-wrap').data([0]);
+           var enter = label.enter().append('label').attr('class', 'form-field-input-wrap form-field-input-check');
+           enter.append('input').property('indeterminate', field.type !== 'defaultCheck').attr('type', 'checkbox').attr('id', field.domId);
+           enter.append('span').html(texts[0]).attr('class', 'value');

 
 

-               return Object.keys(counts).sort(function(geom1, geom2) {
-                   return counts[geom2] - counts[geom1];
-               });
+           if (field.type === 'onewayCheck') {
+             enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');

            }
 
            }
 

-           return utilRebind(section, dispatch$1, 'on');
-       }
+           label = label.merge(enter);
+           input = label.selectAll('input');
+           text = label.selectAll('span.value');
+           input.on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             var t = {};

 
 

-       // This currently only works with the 'restrictions' field
-       // It borrows some code from uiHelp
+             if (Array.isArray(_tags[field.key])) {
+               if (values.indexOf('yes') !== -1) {
+                 t[field.key] = 'yes';
+               } else {
+                 t[field.key] = values[0];
+               }
+             } else {
+               t[field.key] = values[(values.indexOf(_value) + 1) % values.length];
+             } // Don't cycle through `alternating` or `reversible` states - #4970
+             // (They are supported as translated strings, but should not toggle with clicks)

 
 

-       function uiFieldHelp(context, fieldName) {
-           var fieldHelp = {};
-           var _inspector = select(null);
-           var _wrap = select(null);
-           var _body = select(null);
-
-           var fieldHelpKeys = {
-               restrictions: [
-                   ['about',[
-                       'about',
-                       'from_via_to',
-                       'maxdist',
-                       'maxvia'
-                   ]],
-                   ['inspecting',[
-                       'about',
-                       'from_shadow',
-                       'allow_shadow',
-                       'restrict_shadow',
-                       'only_shadow',
-                       'restricted',
-                       'only'
-                   ]],
-                   ['modifying',[
-                       'about',
-                       'indicators',
-                       'allow_turn',
-                       'restrict_turn',
-                       'only_turn'
-                   ]],
-                   ['tips',[
-                       'simple',
-                       'simple_example',
-                       'indirect',
-                       'indirect_example',
-                       'indirect_noedit'
-                   ]]
-               ]
-           };

 
 

-           var fieldHelpHeadings = {};
+             if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
+               t[field.key] = values[0];
+             }

 
 

-           var replacements = {
-               distField: _t('restriction.controls.distance'),
-               viaField: _t('restriction.controls.via'),
-               fromShadow: icon('#iD-turn-shadow', 'pre-text shadow from'),
-               allowShadow: icon('#iD-turn-shadow', 'pre-text shadow allow'),
-               restrictShadow: icon('#iD-turn-shadow', 'pre-text shadow restrict'),
-               onlyShadow: icon('#iD-turn-shadow', 'pre-text shadow only'),
-               allowTurn: icon('#iD-turn-yes', 'pre-text turn'),
-               restrictTurn: icon('#iD-turn-no', 'pre-text turn'),
-               onlyTurn: icon('#iD-turn-only', 'pre-text turn')
-           };
+             dispatch.call('change', this, t);
+           });

 
 

+           if (field.type === 'onewayCheck') {
+             reverser = label.selectAll('.reverser');
+             reverser.call(reverserSetText).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               context.perform(function (graph) {
+                 for (var i in _entityIDs) {
+                   graph = actionReverse(_entityIDs[i])(graph);
+                 }

 
 

-           // For each section, squash all the texts into a single markdown document
-           var docs = fieldHelpKeys[fieldName].map(function(key) {
-               var helpkey = 'help.field.' + fieldName + '.' + key[0];
-               var text = key[1].reduce(function(all, part) {
-                   var subkey = helpkey + '.' + part;
-                   var depth = fieldHelpHeadings[subkey];                     // is this subkey a heading?
-                   var hhh = depth ? Array(depth + 1).join('#') + ' ' : '';   // if so, prepend with some ##'s
-                   return all + hhh + _t(subkey, replacements) + '\n\n';
-               }, '');
+                 return graph;
+               }, _t('operations.reverse.annotation.line', {
+                 n: 1
+               })); // must manually revalidate since no 'change' event was called

 
 

-               return {
-                   key: helpkey,
-                   title: _t(helpkey + '.title'),
-                   html: marked_1(text.trim())
-               };
-           });
+               context.validator().validate();
+               select(this).call(reverserSetText);
+             });
+           }
+         };

 
 

+         check.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return check;
+         };

 
 

-           function show() {
-               updatePosition();
+         check.tags = function (tags) {
+           _tags = tags;

 
 

-               _body
-                   .classed('hide', false)
-                   .style('opacity', '0')
-                   .transition()
-                   .duration(200)
-                   .style('opacity', '1');
+           function isChecked(val) {
+             return val !== 'no' && val !== '' && val !== undefined && val !== null;

            }
 
            }
 

-
-           function hide() {
-               _body
-                   .classed('hide', true)
-                   .transition()
-                   .duration(200)
-                   .style('opacity', '0')
-                   .on('end', function () {
-                       _body.classed('hide', true);
-                   });
+           function textFor(val) {
+             if (val === '') val = undefined;
+             var index = values.indexOf(val);
+             return index !== -1 ? texts[index] : '"' + val + '"';

            }
 
            }
 

+           checkImpliedYes();
+           var isMixed = Array.isArray(tags[field.key]);
+           _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();

 
 

-           function clickHelp(index) {
-               var d = docs[index];
-               var tkeys = fieldHelpKeys[fieldName][index][1];
+           if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
+             _value = 'yes';
+           }

 
 

-               _body.selectAll('.field-help-nav-item')
-                   .classed('active', function(d, i) { return i === index; });
+           input.property('indeterminate', isMixed || field.type !== 'defaultCheck' && !_value).property('checked', isChecked(_value));
+           text.html(isMixed ? _t.html('inspector.multiple_values') : textFor(_value)).classed('mixed', isMixed);
+           label.classed('set', !!_value);

 
 

-               var content = _body.selectAll('.field-help-content')
-                   .html(d.html);
+           if (field.type === 'onewayCheck') {
+             reverser.classed('hide', reverserHidden()).call(reverserSetText);
+           }
+         };

 
 

-               // class the paragraphs so we can find and style them
-               content.selectAll('p')
-                   .attr('class', function(d, i) { return tkeys[i]; });
+         check.focus = function () {
+           input.node().focus();
+         };

 
 

-               // insert special content for certain help sections
-               if (d.key === 'help.field.restrictions.inspecting') {
-                   content
-                       .insert('img', 'p.from_shadow')
-                       .attr('class', 'field-help-image cf')
-                       .attr('src', context.imagePath('tr_inspect.gif'));
+         return utilRebind(check, dispatch, 'on');
+       }

 
 

-               } else if (d.key === 'help.field.restrictions.modifying') {
-                   content
-                       .insert('img', 'p.allow_turn')
-                       .attr('class', 'field-help-image cf')
-                       .attr('src', context.imagePath('tr_modify.gif'));
-               }
-           }
+       function uiFieldCombo(field, context) {
+         var dispatch = dispatch$8('change');

 
 

+         var _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';

 
 

-           fieldHelp.button = function(selection) {
-               if (_body.empty()) { return; }
+         var _isNetwork = field.type === 'networkCombo';

 
 

-               var button = selection.selectAll('.field-help-button')
-                   .data([0]);
+         var _isSemi = field.type === 'semiCombo';

 
 

-               // enter/update
-               button.enter()
-                   .append('button')
-                   .attr('class', 'field-help-button')
-                   .attr('tabindex', -1)
-                   .call(svgIcon('#iD-icon-help'))
-                   .merge(button)
-                   .on('click', function () {
-                       event.stopPropagation();
-                       event.preventDefault();
-                       if (_body.classed('hide')) {
-                           show();
-                       } else {
-                           hide();
-                       }
-                   });
-           };
+         var _optarray = field.options;

 
 

+         var _showTagInfoSuggestions = field.type !== 'manyCombo' && field.autoSuggestions !== false;

 
 

-           function updatePosition() {
-               var wrap = _wrap.node();
-               var inspector = _inspector.node();
-               var wRect = wrap.getBoundingClientRect();
-               var iRect = inspector.getBoundingClientRect();
+         var _allowCustomValues = field.type !== 'manyCombo' && field.customValues !== false;

 
 

-               _body
-                   .style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
-           }
+         var _snake_case = field.snake_case || field.snake_case === undefined;

 
 

+         var _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);

 
 

-           fieldHelp.body = function(selection) {
-               // This control expects the field to have a form-field-input-wrap div
-               _wrap = selection.selectAll('.form-field-input-wrap');
-               if (_wrap.empty()) { return; }
+         var _container = select(null);

 
 

-               // absolute position relative to the inspector, so it "floats" above the fields
-               _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
-               if (_inspector.empty()) { return; }
+         var _inputWrap = select(null);

 
 

-               _body = _inspector.selectAll('.field-help-body')
-                   .data([0]);
+         var _input = select(null);

 
 

-               var enter = _body.enter()
-                   .append('div')
-                   .attr('class', 'field-help-body hide');   // initially hidden
+         var _comboData = [];
+         var _multiData = [];
+         var _entityIDs = [];

 
 

-               var titleEnter = enter
-                   .append('div')
-                   .attr('class', 'field-help-title cf');
-
-               titleEnter
-                   .append('h2')
-                   .attr('class', ((_mainLocalizer.textDirection() === 'rtl') ? 'fr' : 'fl'))
-                   .text(_t('help.field.' + fieldName + '.title'));
-
-               titleEnter
-                   .append('button')
-                   .attr('class', 'fr close')
-                   .on('click', function() {
-                       event.stopPropagation();
-                       event.preventDefault();
-                       hide();
-                   })
-                   .call(svgIcon('#iD-icon-close'));
-
-               var navEnter = enter
-                   .append('div')
-                   .attr('class', 'field-help-nav cf');
+         var _tags;

 
 

-               var titles = docs.map(function(d) { return d.title; });
-               navEnter.selectAll('.field-help-nav-item')
-                   .data(titles)
-                   .enter()
-                   .append('div')
-                   .attr('class', 'field-help-nav-item')
-                   .text(function(d) { return d; })
-                   .on('click', function(d, i) {
-                       event.stopPropagation();
-                       event.preventDefault();
-                       clickHelp(i);
-                   });
+         var _countryCode;

 
 

-               enter
-                   .append('div')
-                   .attr('class', 'field-help-content');
+         var _staticPlaceholder; // initialize deprecated tags array

 
 

-               _body = _body
-                   .merge(enter);

 
 

-               clickHelp(0);
-           };
+         var _dataDeprecated = [];
+         _mainFileFetcher.get('deprecated').then(function (d) {
+           _dataDeprecated = d;
+         })["catch"](function () {
+           /* ignore */
+         }); // ensure multiCombo field.key ends with a ':'

 
 

+         if (_isMulti && field.key && /[^:]$/.test(field.key)) {
+           field.key += ':';
+         }

 
 

-           return fieldHelp;
-       }
+         function snake(s) {
+           return s.replace(/\s+/g, '_').toLowerCase();
+         }

 
 

-       function uiFieldCheck(field, context) {
-           var dispatch$1 = dispatch('change');
-           var options = field.strings && field.strings.options;
-           var values = [];
-           var texts = [];
+         function clean(s) {
+           return s.split(';').map(function (s) {
+             return s.trim();
+           }).join(';');
+         } // returns the tag value for a display value
+         // (for multiCombo, dval should be the key suffix, not the entire key)

 
 

-           var _tags;

 
 

-           var input = select(null);
-           var text = select(null);
-           var label = select(null);
-           var reverser = select(null);
+         function tagValue(dval) {
+           dval = clean(dval || '');

 
 

-           var _impliedYes;
-           var _entityIDs = [];
-           var _value;
+           var found = _comboData.find(function (o) {
+             return o.key && clean(o.value) === dval;
+           });

 
 

+           if (found) return found.key;

 
 

-           if (options) {
-               for (var k in options) {
-                   values.push(k === 'undefined' ? undefined : k);
-                   texts.push(field.t('options.' + k, { 'default': options[k] }));
-               }
-           } else {
-               values = [undefined, 'yes'];
-               texts = [_t('inspector.unknown'), _t('inspector.check.yes')];
-               if (field.type !== 'defaultCheck') {
-                   values.push('no');
-                   texts.push(_t('inspector.check.no'));
-               }
+           if (field.type === 'typeCombo' && !dval) {
+             return 'yes';

            }
 
            }
 

+           return (_snake_case ? snake(dval) : dval) || undefined;
+         } // returns the display value for a tag value
+         // (for multiCombo, tval should be the key suffix, not the entire key)

 
 

-           // Checks tags to see whether an undefined value is "Assumed to be Yes"
-           function checkImpliedYes() {
-               _impliedYes = (field.id === 'oneway_yes');
-
-               // hack: pretend `oneway` field is a `oneway_yes` field
-               // where implied oneway tag exists (e.g. `junction=roundabout`) #2220, #1841
-               if (field.id === 'oneway') {
-                   var entity = context.entity(_entityIDs[0]);
-                   for (var key in entity.tags) {
-                       if (key in osmOneWayTags && (entity.tags[key] in osmOneWayTags[key])) {
-                           _impliedYes = true;
-                           texts[0] = _t('presets.fields.oneway_yes.options.undefined');
-                           break;
-                       }
-                   }
-               }
-           }

 
 

+         function displayValue(tval) {
+           tval = tval || '';

 
 

-           function reverserHidden() {
-               if (!context.container().select('div.inspector-hover').empty()) { return true; }
-               return !(_value === 'yes' || (_impliedYes && !_value));
+           if (field.hasTextForStringId('options.' + tval)) {
+             return field.t('options.' + tval, {
+               "default": tval
+             });

            }
 
            }
 

+           if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
+             return '';
+           }

 
 

-           function reverserSetText(selection) {
-               var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
-               if (reverserHidden() || !entity) { return selection; }
+           return tval;
+         } // Compute the difference between arrays of objects by `value` property
+         //
+         // objectDifference([{value:1}, {value:2}, {value:3}], [{value:2}])
+         // > [{value:1}, {value:3}]
+         //

 
 

-               var first = entity.first();
-               var last = entity.isClosed() ? entity.nodes[entity.nodes.length - 2] : entity.last();
-               var pseudoDirection = first < last;
-               var icon = pseudoDirection ? '#iD-icon-forward' : '#iD-icon-backward';

 
 

-               selection.selectAll('.reverser-span')
-                   .text(_t('inspector.check.reverser'))
-                   .call(svgIcon(icon, 'inline'));
+         function objectDifference(a, b) {
+           return a.filter(function (d1) {
+             return !b.some(function (d2) {
+               return !d2.isMixed && d1.value === d2.value;
+             });
+           });
+         }

 
 

-               return selection;
+         function initCombo(selection, attachTo) {
+           if (!_allowCustomValues) {
+             selection.attr('readonly', 'readonly');

            }
 
            }
 

+           if (_showTagInfoSuggestions && services.taginfo) {
+             selection.call(_combobox.fetcher(setTaginfoValues), attachTo);
+             setTaginfoValues('', setPlaceholder);
+           } else {
+             selection.call(_combobox, attachTo);
+             setStaticValues(setPlaceholder);
+           }
+         }

 
 

-           var check = function(selection) {
-               checkImpliedYes();
-
-               label = selection.selectAll('.form-field-input-wrap')
-                   .data([0]);
-
-               var enter = label.enter()
-                   .append('label')
-                   .attr('class', 'form-field-input-wrap form-field-input-check');
+         function setStaticValues(callback) {
+           if (!_optarray) return;
+           _comboData = _optarray.map(function (v) {
+             return {
+               key: v,
+               value: field.t('options.' + v, {
+                 "default": v
+               }),
+               title: v,
+               display: field.t.html('options.' + v, {
+                 "default": v
+               }),
+               klass: field.hasTextForStringId('options.' + v) ? '' : 'raw-option'
+             };
+           });

 
 

-               enter
-                   .append('input')
-                   .property('indeterminate', field.type !== 'defaultCheck')
-                   .attr('type', 'checkbox')
-                   .attr('id', field.domId);
+           _combobox.data(objectDifference(_comboData, _multiData));

 
 

-               enter
-                   .append('span')
-                   .text(texts[0])
-                   .attr('class', 'value');
+           if (callback) callback(_comboData);
+         }

 
 

-               if (field.type === 'onewayCheck') {
-                   enter
-                       .append('a')
-                       .attr('class', 'reverser button' + (reverserHidden() ? ' hide' : ''))
-                       .attr('href', '#')
-                       .append('span')
-                       .attr('class', 'reverser-span');
-               }
+         function setTaginfoValues(q, callback) {
+           var fn = _isMulti ? 'multikeys' : 'values';
+           var query = (_isMulti ? field.key : '') + q;
+           var hasCountryPrefix = _isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;

 
 

-               label = label.merge(enter);
-               input = label.selectAll('input');
-               text = label.selectAll('span.value');
+           if (hasCountryPrefix) {
+             query = _countryCode + ':';
+           }

 
 

-               input
-                   .on('click', function() {
-                       event.stopPropagation();
-                       var t = {};
+           var params = {
+             debounce: q !== '',
+             key: field.key,
+             query: query
+           };

 
 

-                       if (Array.isArray(_tags[field.key])) {
-                           if (values.indexOf('yes') !== -1) {
-                               t[field.key] = 'yes';
-                           } else {
-                               t[field.key] = values[0];
-                           }
-                       } else {
-                           t[field.key] = values[(values.indexOf(_value) + 1) % values.length];
-                       }
+           if (_entityIDs.length) {
+             params.geometry = context.graph().geometry(_entityIDs[0]);
+           }

 
 

-                       // Don't cycle through `alternating` or `reversible` states - #4970
-                       // (They are supported as translated strings, but should not toggle with clicks)
-                       if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
-                           t[field.key] = values[0];
-                       }
+           services.taginfo[fn](params, function (err, data) {
+             if (err) return;
+             data = data.filter(function (d) {
+               if (field.type === 'typeCombo' && d.value === 'yes') {
+                 // don't show the fallback value
+                 return false;
+               } // don't show values with very low usage

 
 

-                       dispatch$1.call('change', this, t);
-                   });

 
 

-               if (field.type === 'onewayCheck') {
-                   reverser = label.selectAll('.reverser');
-
-                   reverser
-                       .call(reverserSetText)
-                       .on('click', function() {
-                           event.preventDefault();
-                           event.stopPropagation();
-                           context.perform(
-                               function(graph) {
-                                   for (var i in _entityIDs) {
-                                       graph = actionReverse(_entityIDs[i])(graph);
-                                   }
-                                   return graph;
-                               },
-                               _t('operations.reverse.annotation')
-                           );
-
-                           // must manually revalidate since no 'change' event was called
-                           context.validator().validate();
+               return !d.count || d.count > 10;
+             });
+             var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];

 
 

-                           select(this)
-                               .call(reverserSetText);
-                       });
-               }
-           };
+             if (deprecatedValues) {
+               // don't suggest deprecated tag values
+               data = data.filter(function (d) {
+                 return deprecatedValues.indexOf(d.value) === -1;
+               });
+             }

 
 

+             if (hasCountryPrefix) {
+               data = data.filter(function (d) {
+                 return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
+               });
+             } // hide the caret if there are no suggestions

 
 

-           check.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               _entityIDs = val;
-               return check;
-           };

 
 

+             _container.classed('empty-combobox', data.length === 0);

 
 

-           check.tags = function(tags) {
+             _comboData = data.map(function (d) {
+               var k = d.value;
+               if (_isMulti) k = k.replace(field.key, '');
+               var label = field.t('options.' + k, {
+                 "default": k
+               });
+               return {
+                 key: k,
+                 value: label,
+                 display: field.t.html('options.' + k, {
+                   "default": k
+                 }),
+                 title: d.title || label,
+                 klass: field.hasTextForStringId('options.' + k) ? '' : 'raw-option'
+               };
+             });
+             _comboData = objectDifference(_comboData, _multiData);
+             if (callback) callback(_comboData);
+           });
+         }

 
 

-               _tags = tags;
+         function setPlaceholder(values) {
+           if (_isMulti || _isSemi) {
+             _staticPlaceholder = field.placeholder() || _t('inspector.add');
+           } else {
+             var vals = values.map(function (d) {
+               return d.value;
+             }).filter(function (s) {
+               return s.length < 20;
+             });
+             var placeholders = vals.length > 1 ? vals : values.map(function (d) {
+               return d.key;
+             });
+             _staticPlaceholder = field.placeholder() || placeholders.slice(0, 3).join(', ');
+           }

 
 

-               function isChecked(val) {
-                   return val !== 'no' && val !== '' && val !== undefined && val !== null;
-               }
+           if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
+             _staticPlaceholder += '…';
+           }

 
 

-               function textFor(val) {
-                   if (val === '') { val = undefined; }
-                   var index = values.indexOf(val);
-                   return (index !== -1 ? texts[index] : ('"' + val + '"'));
-               }
+           var ph;

 
 

-               checkImpliedYes();
+           if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
+             ph = _t('inspector.multiple_values');
+           } else {
+             ph = _staticPlaceholder;
+           }

 
 

-               var isMixed = Array.isArray(tags[field.key]);
+           _container.selectAll('input').attr('placeholder', ph);
+         }

 
 

-               _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
+         function change() {
+           var t = {};
+           var val;

 
 

-               if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
-                   _value = 'yes';
-               }
+           if (_isMulti || _isSemi) {
+             val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';

 
 

-               input
-                   .property('indeterminate', isMixed || (field.type !== 'defaultCheck' && !_value))
-                   .property('checked', isChecked(_value));
+             _container.classed('active', false);

 
 

-               text
-                   .text(isMixed ? _t('inspector.multiple_values') : textFor(_value))
-                   .classed('mixed', isMixed);
+             utilGetSetValue(_input, '');
+             var vals = val.split(';').filter(Boolean);
+             if (!vals.length) return;

 
 

-               label
-                   .classed('set', !!_value);
+             if (_isMulti) {
+               utilArrayUniq(vals).forEach(function (v) {
+                 var key = (field.key || '') + v;

 
 

-               if (field.type === 'onewayCheck') {
-                   reverser
-                       .classed('hide', reverserHidden())
-                       .call(reverserSetText);
-               }
-           };
+                 if (_tags) {
+                   // don't set a multicombo value to 'yes' if it already has a non-'no' value
+                   // e.g. `language:de=main`
+                   var old = _tags[key];
+                   if (typeof old === 'string' && old.toLowerCase() !== 'no') return;
+                 }

 
 

+                 key = context.cleanTagKey(key);
+                 field.keys.push(key);
+                 t[key] = 'yes';
+               });
+             } else if (_isSemi) {
+               var arr = _multiData.map(function (d) {
+                 return d.key;
+               });

 
 

-           check.focus = function() {
-               input.node().focus();
-           };
+               arr = arr.concat(vals);
+               t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
+             }

 
 

-           return utilRebind(check, dispatch$1, 'on');
-       }
+             window.setTimeout(function () {
+               _input.node().focus();
+             }, 10);
+           } else {
+             var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string

 
 

-       function uiFieldCombo(field, context) {
-           var dispatch$1 = dispatch('change');
-           var taginfo = services.taginfo;
-           var isMulti = (field.type === 'multiCombo');
-           var isNetwork = (field.type === 'networkCombo');
-           var isSemi = (field.type === 'semiCombo');
-           var optstrings = field.strings && field.strings.options;
-           var optarray = field.options;
-           var snake_case = (field.snake_case || (field.snake_case === undefined));
-           var caseSensitive = field.caseSensitive;
-           var combobox = uiCombobox(context, 'combo-' + field.safeid)
-               .caseSensitive(caseSensitive)
-               .minItems(isMulti || isSemi ? 1 : 2);
-           var container = select(null);
-           var inputWrap = select(null);
-           var input = select(null);
-           var _comboData = [];
-           var _multiData = [];
-           var _entityIDs = [];
-           var _tags;
-           var _countryCode;
-           var _staticPlaceholder;
-
-           // initialize deprecated tags array
-           var _dataDeprecated = [];
-           _mainFileFetcher.get('deprecated')
-               .then(function(d) { _dataDeprecated = d; })
-               .catch(function() { /* ignore */ });
-
-
-           // ensure multiCombo field.key ends with a ':'
-           if (isMulti && /[^:]$/.test(field.key)) {
-               field.key += ':';
-           }
-
-
-           function snake(s) {
-               return s.replace(/\s+/g, '_');
-           }
-
-           function unsnake(s) {
-               return s.replace(/_+/g, ' ');
-           }
-
-           function clean(s) {
-               return s.split(';')
-                   .map(function(s) { return s.trim(); })
-                   .join(';');
+             if (!rawValue && Array.isArray(_tags[field.key])) return;
+             val = context.cleanTagValue(tagValue(rawValue));
+             t[field.key] = val || undefined;

            }
 
            }
 

+           dispatch.call('change', this, t);
+         }

 
 

-           // returns the tag value for a display value
-           // (for multiCombo, dval should be the key suffix, not the entire key)
-           function tagValue(dval) {
-               dval = clean(dval || '');
-
-               if (optstrings) {
-                   var found = _comboData.find(function(o) {
-                       return o.key && clean(o.value) === dval;
-                   });
-                   if (found) {
-                       return found.key;
-                   }
-               }
+         function removeMultikey(d3_event, d) {
+           d3_event.preventDefault();
+           d3_event.stopPropagation();
+           var t = {};

 
 

-               if (field.type === 'typeCombo' && !dval) {
-                   return 'yes';
-               }
+           if (_isMulti) {
+             t[d.key] = undefined;
+           } else if (_isSemi) {
+             var arr = _multiData.map(function (md) {
+               return md.key === d.key ? null : md.key;
+             }).filter(Boolean);

 
 

-               return (snake_case ? snake(dval) : dval) || undefined;
+             arr = utilArrayUniq(arr);
+             t[field.key] = arr.length ? arr.join(';') : undefined;

            }
 
            }
 

+           dispatch.call('change', this, t);
+         }

 
 

-           // returns the display value for a tag value
-           // (for multiCombo, tval should be the key suffix, not the entire key)
-           function displayValue(tval) {
-               tval = tval || '';
+         function combo(selection) {
+           _container = selection.selectAll('.form-field-input-wrap').data([0]);
+           var type = _isMulti || _isSemi ? 'multicombo' : 'combo';
+           _container = _container.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + type).merge(_container);

 
 

-               if (optstrings) {
-                   var found = _comboData.find(function(o) {
-                       return o.key === tval && o.value;
-                   });
-                   if (found) {
-                       return found.value;
-                   }
-               }
+           if (_isMulti || _isSemi) {
+             _container = _container.selectAll('.chiplist').data([0]);
+             var listClass = 'chiplist'; // Use a separate line for each value in the Destinations and Via fields
+             // to mimic highway exit signs

 
 

-               if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
-                   return '';
-               }
+             if (field.key === 'destination' || field.key === 'via') {
+               listClass += ' full-line-chips';
+             }

 
 

-               return snake_case ? unsnake(tval) : tval;
+             _container = _container.enter().append('ul').attr('class', listClass).on('click', function () {
+               window.setTimeout(function () {
+                 _input.node().focus();
+               }, 10);
+             }).merge(_container);
+             _inputWrap = _container.selectAll('.input-wrap').data([0]);
+             _inputWrap = _inputWrap.enter().append('li').attr('class', 'input-wrap').merge(_inputWrap);
+             _input = _inputWrap.selectAll('input').data([0]);
+           } else {
+             _input = _container.selectAll('input').data([0]);

            }
 
            }
 

+           _input = _input.enter().append('input').attr('type', 'text').attr('id', field.domId).call(utilNoAuto).call(initCombo, selection).merge(_input);

 
 

-           // Compute the difference between arrays of objects by `value` property
-           //
-           // objectDifference([{value:1}, {value:2}, {value:3}], [{value:2}])
-           // > [{value:1}, {value:3}]
-           //
-           function objectDifference(a, b) {
-               return a.filter(function(d1) {
-                   return !b.some(function(d2) {
-                       return !d2.isMixed && d1.value === d2.value;
-                   });
-               });
+           if (_isNetwork) {
+             var extent = combinedEntityExtent();
+             var countryCode = extent && iso1A2Code(extent.center());
+             _countryCode = countryCode && countryCode.toLowerCase();

            }
 
            }
 

+           _input.on('change', change).on('blur', change);

 
 

-           function initCombo(selection, attachTo) {
-               if (optstrings) {
-                   selection.attr('readonly', 'readonly');
-                   selection.call(combobox, attachTo);
-                   setStaticValues(setPlaceholder);
+           _input.on('keydown.field', function (d3_event) {
+             switch (d3_event.keyCode) {
+               case 13:
+                 // ↩ Return
+                 _input.node().blur(); // blurring also enters the value

 
 

-               } else if (optarray) {
-                   selection.call(combobox, attachTo);
-                   setStaticValues(setPlaceholder);

 
 

-               } else if (taginfo) {
-                   selection.call(combobox.fetcher(setTaginfoValues), attachTo);
-                   setTaginfoValues('', setPlaceholder);
-               }
-           }
+                 d3_event.stopPropagation();
+                 break;
+             }
+           });

 
 

+           if (_isMulti || _isSemi) {
+             _combobox.on('accept', function () {
+               _input.node().blur();

 
 

-           function setStaticValues(callback) {
-               if (!(optstrings || optarray)) { return; }
+               _input.node().focus();
+             });

 
 

-               if (optstrings) {
-                   _comboData = Object.keys(optstrings).map(function(k) {
-                       var v = field.t('options.' + k, { 'default': optstrings[k] });
-                       return {
-                           key: k,
-                           value: v,
-                           title: v
-                       };
-                   });
+             _input.on('focus', function () {
+               _container.classed('active', true);
+             });
+           }
+         }

 
 

-               } else if (optarray) {
-                   _comboData = optarray.map(function(k) {
-                       var v = snake_case ? unsnake(k) : k;
-                       return {
-                           key: k,
-                           value: v,
-                           title: v
-                       };
-                   });
+         combo.tags = function (tags) {
+           _tags = tags;
+
+           if (_isMulti || _isSemi) {
+             _multiData = [];
+             var maxLength;
+
+             if (_isMulti) {
+               // Build _multiData array containing keys already set..
+               for (var k in tags) {
+                 if (field.key && k.indexOf(field.key) !== 0) continue;
+                 if (!field.key && field.keys.indexOf(k) === -1) continue;
+                 var v = tags[k];
+                 if (!v || typeof v === 'string' && v.toLowerCase() === 'no') continue;
+                 var suffix = field.key ? k.substr(field.key.length) : k;
+
+                 _multiData.push({
+                   key: k,
+                   value: displayValue(suffix),
+                   isMixed: Array.isArray(v)
+                 });

                }
 
                }
 

-               combobox.data(objectDifference(_comboData, _multiData));
-               if (callback) { callback(_comboData); }
-           }
+               if (field.key) {
+                 // Set keys for form-field modified (needed for undo and reset buttons)..
+                 field.keys = _multiData.map(function (d) {
+                   return d.key;
+                 }); // limit the input length so it fits after prepending the key prefix
+
+                 maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+               } else {
+                 maxLength = context.maxCharsForTagKey();
+               }
+             } else if (_isSemi) {
+               var allValues = [];
+               var commonValues;

 
 

+               if (Array.isArray(tags[field.key])) {
+                 tags[field.key].forEach(function (tagVal) {
+                   var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
+                   allValues = allValues.concat(thisVals);

 
 

-           function setTaginfoValues(q, callback) {
-               var fn = isMulti ? 'multikeys' : 'values';
-               var query = (isMulti ? field.key : '') + q;
-               var hasCountryPrefix = isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;
-               if (hasCountryPrefix) {
-                   query = _countryCode + ':';
+                   if (!commonValues) {
+                     commonValues = thisVals;
+                   } else {
+                     commonValues = commonValues.filter(function (value) {
+                       return thisVals.includes(value);
+                     });
+                   }
+                 });
+                 allValues = utilArrayUniq(allValues).filter(Boolean);
+               } else {
+                 allValues = utilArrayUniq((tags[field.key] || '').split(';')).filter(Boolean);
+                 commonValues = allValues;

                }
 
                }
 

-               var params = {
-                   debounce: (q !== ''),
-                   key: field.key,
-                   query: query
-               };
+               _multiData = allValues.map(function (v) {
+                 return {
+                   key: v,
+                   value: displayValue(v),
+                   isMixed: !commonValues.includes(v)
+                 };
+               });
+               var currLength = utilUnicodeCharsCount(commonValues.join(';')); // limit the input length to the remaining available characters
+
+               maxLength = context.maxCharsForTagValue() - currLength;

 
 

-               if (_entityIDs.length) {
-                   params.geometry = context.graph().geometry(_entityIDs[0]);
+               if (currLength > 0) {
+                 // account for the separator if a new value will be appended to existing
+                 maxLength -= 1;

                }
                }

+             } // a negative maxlength doesn't make sense

 
 

-               taginfo[fn](params, function(err, data) {
-                   if (err) { return; }

 
 

-                   data = data.filter(function(d) {
+             maxLength = Math.max(0, maxLength);
+             var allowDragAndDrop = _isSemi // only semiCombo values are ordered
+             && !Array.isArray(tags[field.key]); // Exclude existing multikeys from combo options..

 
 

-                       if (field.type === 'typeCombo' && d.value === 'yes') {
-                           // don't show the fallback value
-                           return false;
-                       }
+             var available = objectDifference(_comboData, _multiData);

 
 

-                       // don't show values with very low usage
-                       return !d.count || d.count > 10;
-                   });
+             _combobox.data(available); // Hide 'Add' button if this field uses fixed set of
+             // options and they're all currently used,
+             // or if the field is already at its character limit

 
 

-                   var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
-                   if (deprecatedValues) {
-                       // don't suggest deprecated tag values
-                       data = data.filter(function(d) {
-                           return deprecatedValues.indexOf(d.value) === -1;
-                       });
-                   }

 
 

-                   if (hasCountryPrefix) {
-                       data = data.filter(function(d) {
-                           return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
-                       });
-                   }
+             var hideAdd = !_allowCustomValues && !available.length || maxLength <= 0;

 
 

-                   // hide the caret if there are no suggestions
-                   container.classed('empty-combobox', data.length === 0);
-
-                   _comboData = data.map(function(d) {
-                       var k = d.value;
-                       if (isMulti) { k = k.replace(field.key, ''); }
-                       var v = snake_case ? unsnake(k) : k;
-                       return {
-                           key: k,
-                           value: v,
-                           title: isMulti ? v : d.title
-                       };
-                   });
+             _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips

 
 

-                   _comboData = objectDifference(_comboData, _multiData);
-                   if (callback) { callback(_comboData); }
-               });
-           }

 
 

+             var chips = _container.selectAll('.chip').data(_multiData);

 
 

-           function setPlaceholder(values) {
+             chips.exit().remove();
+             var enter = chips.enter().insert('li', '.input-wrap').attr('class', 'chip');
+             enter.append('span');
+             enter.append('a');
+             chips = chips.merge(enter).order().classed('raw-value', function (d) {
+               var k = d.key;
+               if (_isMulti) k = k.replace(field.key, '');
+               return !field.hasTextForStringId('options.' + k);
+             }).classed('draggable', allowDragAndDrop).classed('mixed', function (d) {
+               return d.isMixed;
+             }).attr('title', function (d) {
+               return d.isMixed ? _t('inspector.unshared_value_tooltip') : null;
+             });

 
 

-               if (isMulti || isSemi) {
-                   _staticPlaceholder = field.placeholder() || _t('inspector.add');
-               } else {
-                   var vals = values
-                       .map(function(d) { return d.value; })
-                       .filter(function(s) { return s.length < 20; });
+             if (allowDragAndDrop) {
+               registerDragAndDrop(chips);
+             }

 
 

-                   var placeholders = vals.length > 1 ? vals : values.map(function(d) { return d.key; });
-                   _staticPlaceholder = field.placeholder() || placeholders.slice(0, 3).join(', ');
+             chips.select('span').html(function (d) {
+               return d.value;
+             });
+             chips.select('a').attr('href', '#').on('click', removeMultikey).attr('class', 'remove').html('×');
+           } else {
+             var isMixed = Array.isArray(tags[field.key]);
+             var mixedValues = isMixed && tags[field.key].map(function (val) {
+               return displayValue(val);
+             }).filter(Boolean);
+             var showsValue = !isMixed && tags[field.key] && !(field.type === 'typeCombo' && tags[field.key] === 'yes');
+             var isRawValue = showsValue && !field.hasTextForStringId('options.' + tags[field.key]);
+             var isKnownValue = showsValue && !isRawValue;
+             var isReadOnly = !_allowCustomValues || isKnownValue;
+             utilGetSetValue(_input, !isMixed ? displayValue(tags[field.key]) : '').classed('raw-value', isRawValue).classed('known-value', isKnownValue).attr('readonly', isReadOnly ? 'readonly' : undefined).attr('title', isMixed ? mixedValues.join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : _staticPlaceholder || '').classed('mixed', isMixed).on('keydown.deleteCapture', function (d3_event) {
+               if (isReadOnly && isKnownValue && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
+                 d3_event.preventDefault();
+                 d3_event.stopPropagation();
+                 var t = {};
+                 t[field.key] = undefined;
+                 dispatch.call('change', this, t);

                }
                }

+             });
+           }
+         };

 
 

-               if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
-                   _staticPlaceholder += '…';
-               }
+         function registerDragAndDrop(selection) {
+           // allow drag and drop re-ordering of chips
+           var dragOrigin, targetIndex;
+           selection.call(d3_drag().on('start', function (d3_event) {
+             dragOrigin = {
+               x: d3_event.x,
+               y: d3_event.y
+             };
+             targetIndex = null;
+           }).on('drag', function (d3_event) {
+             var x = d3_event.x - dragOrigin.x,
+                 y = d3_event.y - dragOrigin.y;
+             if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
+             Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
+             var index = selection.nodes().indexOf(this);
+             select(this).classed('dragging', true);
+             targetIndex = null;
+             var targetIndexOffsetTop = null;
+             var draggedTagWidth = select(this).node().offsetWidth;
+
+             if (field.key === 'destination' || field.key === 'via') {
+               // meaning tags are full width
+               _container.selectAll('.chip').style('transform', function (d2, index2) {
+                 var node = select(this).node();
+
+                 if (index === index2) {
+                   return 'translate(' + x + 'px, ' + y + 'px)'; // move the dragged tag up the order
+                 } else if (index2 > index && d3_event.y > node.offsetTop) {
+                   if (targetIndex === null || index2 > targetIndex) {
+                     targetIndex = index2;
+                   }
+
+                   return 'translateY(-100%)'; // move the dragged tag down the order
+                 } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+                   if (targetIndex === null || index2 < targetIndex) {
+                     targetIndex = index2;
+                   }
+
+                   return 'translateY(100%)';
+                 }

 
 

-               var ph;
-               if (!isMulti && !isSemi && _tags && Array.isArray(_tags[field.key])) {
-                   ph = _t('inspector.multiple_values');
-               } else {
-                   ph =  _staticPlaceholder;
-               }
+                 return null;
+               });
+             } else {
+               _container.selectAll('.chip').each(function (d2, index2) {
+                 var node = select(this).node(); // check the cursor is in the bounding box

 
 

-               container.selectAll('input')
-                   .attr('placeholder', ph);
-           }
+                 if (index !== index2 && d3_event.x < node.offsetLeft + node.offsetWidth + 5 && d3_event.x > node.offsetLeft && d3_event.y < node.offsetTop + node.offsetHeight && d3_event.y > node.offsetTop) {
+                   targetIndex = index2;
+                   targetIndexOffsetTop = node.offsetTop;
+                 }
+               }).style('transform', function (d2, index2) {
+                 var node = select(this).node();

 
 

+                 if (index === index2) {
+                   return 'translate(' + x + 'px, ' + y + 'px)';
+                 } // only translate tags in the same row

 
 

-           function change() {
-               var t = {};
-               var val;
-
-               if (isMulti || isSemi) {
-                   val = tagValue(utilGetSetValue(input).replace(/,/g, ';')) || '';
-                   container.classed('active', false);
-                   utilGetSetValue(input, '');
-
-                   var vals = val.split(';').filter(Boolean);
-                   if (!vals.length) { return; }
-
-                   if (isMulti) {
-                       utilArrayUniq(vals).forEach(function(v) {
-                           var key = field.key + v;
-                           if (_tags) {
-                               // don't set a multicombo value to 'yes' if it already has a non-'no' value
-                               // e.g. `language:de=main`
-                               var old = _tags[key];
-                               if (typeof old === 'string' && old.toLowerCase() !== 'no') { return; }
-                           }
-                           key = context.cleanTagKey(key);
-                           field.keys.push(key);
-                           t[key] = 'yes';
-                       });

 
 

-                   } else if (isSemi) {
-                       var arr = _multiData.map(function(d) { return d.key; });
-                       arr = arr.concat(vals);
-                       t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
+                 if (node.offsetTop === targetIndexOffsetTop) {
+                   if (index2 < index && index2 >= targetIndex) {
+                     return 'translateX(' + draggedTagWidth + 'px)';
+                   } else if (index2 > index && index2 <= targetIndex) {
+                     return 'translateX(-' + draggedTagWidth + 'px)';

                    }
                    }

+                 }

 
 

-                   window.setTimeout(function() { input.node().focus(); }, 10);
+                 return null;
+               });
+             }
+           }).on('end', function () {
+             if (!select(this).classed('dragging')) {
+               return;
+             }

 
 

-               } else {
-                   var rawValue = utilGetSetValue(input);
+             var index = selection.nodes().indexOf(this);
+             select(this).classed('dragging', false);

 
 

-                   // don't override multiple values with blank string
-                   if (!rawValue && Array.isArray(_tags[field.key])) { return; }
+             _container.selectAll('.chip').style('transform', null);

 
 

-                   val = context.cleanTagValue(tagValue(rawValue));
-                   t[field.key] = val || undefined;
-               }
+             if (typeof targetIndex === 'number') {
+               var element = _multiData[index];

 
 

-               dispatch$1.call('change', this, t);
-           }
+               _multiData.splice(index, 1);

 
 

+               _multiData.splice(targetIndex, 0, element);

 
 

-           function removeMultikey(d) {
-               event.stopPropagation();

                var t = {};
                var t = {};

-               if (isMulti) {
-                   t[d.key] = undefined;
-               } else if (isSemi) {
-                   var arr = _multiData.map(function(md) {
-                       return md.key === d.key ? null : md.key;
-                   }).filter(Boolean);

 
 

-                   arr = utilArrayUniq(arr);
-                   t[field.key] = arr.length ? arr.join(';') : undefined;
+               if (_multiData.length) {
+                 t[field.key] = _multiData.map(function (element) {
+                   return element.key;
+                 }).join(';');
+               } else {
+                 t[field.key] = undefined;

                }
                }

-               dispatch$1.call('change', this, t);
-           }

 
 

+               dispatch.call('change', this, t);
+             }

 
 

-           function combo(selection) {
-               container = selection.selectAll('.form-field-input-wrap')
-                   .data([0]);
+             dragOrigin = undefined;
+             targetIndex = undefined;
+           }));
+         }

 
 

-               var type = (isMulti || isSemi) ? 'multicombo': 'combo';
-               container = container.enter()
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-' + type)
-                   .merge(container);
+         combo.focus = function () {
+           _input.node().focus();
+         };

 
 

-               if (isMulti || isSemi) {
-                   container = container.selectAll('.chiplist')
-                       .data([0]);
+         combo.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return combo;
+         };

 
 

-                   var listClass = 'chiplist';
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }

 
 

-                   // Use a separate line for each value in the Destinations field
-                   // to mimic highway exit signs
-                   if (field.key === 'destination') {
-                       listClass += ' full-line-chips';
-                   }
+         return utilRebind(combo, dispatch, 'on');
+       }

 
 

-                   container = container.enter()
-                       .append('ul')
-                       .attr('class', listClass)
-                       .on('click', function() {
-                           window.setTimeout(function() { input.node().focus(); }, 10);
-                       })
-                       .merge(container);
+       function uiFieldText(field, context) {
+         var dispatch = dispatch$8('change');
+         var input = select(null);
+         var outlinkButton = select(null);
+         var _entityIDs = [];

 
 

+         var _tags;

 
 

-                   inputWrap = container.selectAll('.input-wrap')
-                       .data([0]);
+         var _phoneFormats = {};

 
 

-                   inputWrap = inputWrap.enter()
-                       .append('li')
-                       .attr('class', 'input-wrap')
-                       .merge(inputWrap);
+         if (field.type === 'tel') {
+           _mainFileFetcher.get('phone_formats').then(function (d) {
+             _phoneFormats = d;
+             updatePhonePlaceholder();
+           })["catch"](function () {
+             /* ignore */
+           });
+         }

 
 

-                   input = inputWrap.selectAll('input')
-                       .data([0]);
-               } else {
-                   input = container.selectAll('input')
-                       .data([0]);
-               }
-
-               input = input.enter()
-                   .append('input')
-                   .attr('type', 'text')
-                   .attr('id', field.domId)
-                   .call(utilNoAuto)
-                   .call(initCombo, selection)
-                   .merge(input);
-
-               if (isNetwork) {
-                   var extent = combinedEntityExtent();
-                   var countryCode = extent && iso1A2Code(extent.center());
-                   _countryCode = countryCode && countryCode.toLowerCase();
-               }
-
-               input
-                   .on('change', change)
-                   .on('blur', change);
-
-               input
-                   .on('keydown.field', function() {
-                       switch (event.keyCode) {
-                           case 13: // ↩ Return
-                               input.node().blur(); // blurring also enters the value
-                               event.stopPropagation();
-                               break;
-                       }
-                   });
+         function calcLocked() {
+           // Protect certain fields that have a companion `*:wikidata` value
+           var isLocked = (field.id === 'brand' || field.id === 'network' || field.id === 'operator' || field.id === 'flag') && _entityIDs.length && _entityIDs.some(function (entityID) {
+             var entity = context.graph().hasEntity(entityID);
+             if (!entity) return false; // Features linked to Wikidata are likely important and should be protected

 
 

-               if (isMulti || isSemi) {
-                   combobox
-                       .on('accept', function() {
-                           input.node().blur();
-                           input.node().focus();
-                       });
+             if (entity.tags.wikidata) return true;
+             var preset = _mainPresetIndex.match(entity, context.graph());
+             var isSuggestion = preset && preset.suggestion; // Lock the field if there is a value and a companion `*:wikidata` value
+
+             var which = field.id; // 'brand', 'network', 'operator', 'flag'
+
+             return isSuggestion && !!entity.tags[which] && !!entity.tags[which + ':wikidata'];
+           });
+
+           field.locked(isLocked);
+         }
+
+         function i(selection) {
+           calcLocked();
+           var isLocked = field.locked();
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           input = wrap.selectAll('input').data([0]);
+           input = input.enter().append('input').attr('type', field.type === 'identifier' ? 'text' : field.type).attr('id', field.domId).classed(field.type, true).call(utilNoAuto).merge(input);
+           input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
+
+           if (field.type === 'tel') {
+             updatePhonePlaceholder();
+           } else if (field.type === 'number') {
+             var rtl = _mainLocalizer.textDirection() === 'rtl';
+             input.attr('type', 'text');
+             var inc = field.increment;
+             var buttons = wrap.selectAll('.increment, .decrement').data(rtl ? [inc, -inc] : [-inc, inc]);
+             buttons.enter().append('button').attr('class', function (d) {
+               var which = d > 0 ? 'increment' : 'decrement';
+               return 'form-field-button ' + which;
+             }).merge(buttons).on('click', function (d3_event, d) {
+               d3_event.preventDefault();
+               var raw_vals = input.node().value || '0';
+               var vals = raw_vals.split(';');
+               vals = vals.map(function (v) {
+                 var num = parseFloat(v.trim(), 10);
+                 return isFinite(num) ? clamped(num + d) : v.trim();
+               });
+               input.node().value = vals.join(';');
+               change()();
+             });
+           } else if (field.type === 'identifier' && field.urlFormat && field.pattern) {
+             input.attr('type', 'text');
+             outlinkButton = wrap.selectAll('.foreign-id-permalink').data([0]);
+             outlinkButton.enter().append('button').call(svgIcon('#iD-icon-out-link')).attr('class', 'form-field-button foreign-id-permalink').attr('title', function () {
+               var domainResults = /^https?:\/\/(.{1,}?)\//.exec(field.urlFormat);
+
+               if (domainResults.length >= 2 && domainResults[1]) {
+                 var domain = domainResults[1];
+                 return _t('icons.view_on', {
+                   domain: domain
+                 });
+               }
+
+               return '';
+             }).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               var value = validIdentifierValueForLink();

 
 

-                   input
-                       .on('focus', function() { container.classed('active', true); });
+               if (value) {
+                 var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
+                 window.open(url, '_blank');

                }
                }

+             }).merge(outlinkButton);
+           } else if (field.type === 'url') {
+             input.attr('type', 'text');
+             outlinkButton = wrap.selectAll('.foreign-id-permalink').data([0]);
+             outlinkButton.enter().append('button').call(svgIcon('#iD-icon-out-link')).attr('class', 'form-field-button foreign-id-permalink').attr('title', function () {
+               return _t('icons.visit_website');
+             }).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               var value = validIdentifierValueForLink();
+               if (value) window.open(value, '_blank');
+             }).merge(outlinkButton);

            }
            }

+         }

 
 

+         function updatePhonePlaceholder() {
+           if (input.empty() || !Object.keys(_phoneFormats).length) return;
+           var extent = combinedEntityExtent();
+           var countryCode = extent && iso1A2Code(extent.center());

 
 

-           combo.tags = function(tags) {
-               _tags = tags;
+           var format = countryCode && _phoneFormats[countryCode.toLowerCase()];

 
 

-               if (isMulti || isSemi) {
-                   _multiData = [];
+           if (format) input.attr('placeholder', format);
+         }

 
 

-                   var maxLength;
+         function validIdentifierValueForLink() {
+           var value = utilGetSetValue(input).trim().split(';')[0];
+           if (field.type === 'url' && value) return value;

 
 

-                   if (isMulti) {
-                       // Build _multiData array containing keys already set..
-                       for (var k in tags) {
-                           if (k.indexOf(field.key) !== 0) { continue; }
-                           var v = tags[k];
-                           if (!v || (typeof v === 'string' && v.toLowerCase() === 'no')) { continue; }
+           if (field.type === 'identifier' && field.pattern) {
+             return value && value.match(new RegExp(field.pattern));
+           }

 
 

-                           var suffix = k.substring(field.key.length);
-                           _multiData.push({
-                               key: k,
-                               value: displayValue(suffix),
-                               isMixed: Array.isArray(v)
-                           });
-                       }
+           return null;
+         } // clamp number to min/max

 
 

-                       // Set keys for form-field modified (needed for undo and reset buttons)..
-                       field.keys = _multiData.map(function(d) { return d.key; });

 
 

-                       // limit the input length so it fits after prepending the key prefix
-                       maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+         function clamped(num) {
+           if (field.minValue !== undefined) {
+             num = Math.max(num, field.minValue);
+           }

 
 

-                   } else if (isSemi) {
+           if (field.maxValue !== undefined) {
+             num = Math.min(num, field.maxValue);
+           }

 
 

-                       var allValues = [];
-                       var commonValues;
-                       if (Array.isArray(tags[field.key])) {
+           return num;
+         }

 
 

-                           tags[field.key].forEach(function(tagVal) {
-                               var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
-                               allValues = allValues.concat(thisVals);
-                               if (!commonValues) {
-                                   commonValues = thisVals;
-                               } else {
-                                   commonValues = commonValues.filter(function (value) { return thisVals.includes(value); });
-                               }
-                           });
-                           allValues = utilArrayUniq(allValues).filter(Boolean);
+         function change(onInput) {
+           return function () {
+             var t = {};
+             var val = utilGetSetValue(input);
+             if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string

 
 

-                       } else {
-                           allValues =  utilArrayUniq((tags[field.key] || '').split(';')).filter(Boolean);
-                           commonValues = allValues;
-                       }
+             if (!val && Array.isArray(_tags[field.key])) return;

 
 

-                       _multiData = allValues.map(function(v) {
-                           return {
-                               key: v,
-                               value: displayValue(v),
-                               isMixed: !commonValues.includes(v)
-                           };
-                       });
+             if (!onInput) {
+               if (field.type === 'number' && val) {
+                 var vals = val.split(';');
+                 vals = vals.map(function (v) {
+                   var num = parseFloat(v.trim(), 10);
+                   return isFinite(num) ? clamped(num) : v.trim();
+                 });
+                 val = vals.join(';');
+               }

 
 

-                       var currLength = utilUnicodeCharsCount(commonValues.join(';'));
+               utilGetSetValue(input, val);
+             }

 
 

-                       // limit the input length to the remaining available characters
-                       maxLength = context.maxCharsForTagValue() - currLength;
+             t[field.key] = val || undefined;
+             dispatch.call('change', this, t, onInput);
+           };
+         }

 
 

-                       if (currLength > 0) {
-                           // account for the separator if a new value will be appended to existing
-                           maxLength -= 1;
-                       }
-                   }
-                   // a negative maxlength doesn't make sense
-                   maxLength = Math.max(0, maxLength);
+         i.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return i;
+         };

 
 

-                   var allowDragAndDrop = isSemi // only semiCombo values are ordered
-                       && !Array.isArray(tags[field.key]);
+         i.tags = function (tags) {
+           _tags = tags;
+           var isMixed = Array.isArray(tags[field.key]);
+           utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);

 
 

-                   // Exclude existing multikeys from combo options..
-                   var available = objectDifference(_comboData, _multiData);
-                   combobox.data(available);
+           if (outlinkButton && !outlinkButton.empty()) {
+             var disabled = !validIdentifierValueForLink();
+             outlinkButton.classed('disabled', disabled);
+           }
+         };

 
 

-                   // Hide 'Add' button if this field uses fixed set of
-                   // translateable optstrings and they're all currently used,
-                   // or if the field is already at its character limit
-                   var hideAdd = (optstrings && !available.length) || maxLength <= 0;
-                   container.selectAll('.chiplist .input-wrap')
-                       .style('display', hideAdd ? 'none' : null);
+         i.focus = function () {
+           var node = input.node();
+           if (node) node.focus();
+         };

 
 

+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }

 
 

-                   // Render chips
-                   var chips = container.selectAll('.chip')
-                       .data(_multiData);
+         return utilRebind(i, dispatch, 'on');
+       }

 
 

-                   chips.exit()
-                       .remove();
+       function uiFieldAccess(field, context) {
+         var dispatch = dispatch$8('change');
+         var items = select(null);

 
 

-                   var enter = chips.enter()
-                       .insert('li', '.input-wrap')
-                       .attr('class', 'chip');
+         var _tags;

 
 

-                   enter.append('span');
-                   enter.append('a');
+         function access(selection) {
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           var list = wrap.selectAll('ul').data([0]);
+           list = list.enter().append('ul').attr('class', 'rows').merge(list);
+           items = list.selectAll('li').data(field.keys); // Enter

 
 

-                   chips = chips.merge(enter)
-                       .order()
-                       .classed('draggable', allowDragAndDrop)
-                       .classed('mixed', function(d) {
-                           return d.isMixed;
-                       })
-                       .attr('title', function(d) {
-                           return d.isMixed ? _t('inspector.unshared_value_tooltip') : null;
-                       });
+           var enter = items.enter().append('li').attr('class', function (d) {
+             return 'labeled-input preset-access-' + d;
+           });
+           enter.append('span').attr('class', 'label preset-label-access').attr('for', function (d) {
+             return 'preset-input-access-' + d;
+           }).html(function (d) {
+             return field.t.html('types.' + d);
+           });
+           enter.append('div').attr('class', 'preset-input-access-wrap').append('input').attr('type', 'text').attr('class', function (d) {
+             return 'preset-input-access preset-input-access-' + d;
+           }).call(utilNoAuto).each(function (d) {
+             select(this).call(uiCombobox(context, 'access-' + d).data(access.options(d)));
+           }); // Update

 
 

-                   if (allowDragAndDrop) {
-                       registerDragAndDrop(chips);
-                   }
+           items = items.merge(enter);
+           wrap.selectAll('.preset-input-access').on('change', change).on('blur', change);
+         }

 
 

-                   chips.select('span')
-                       .text(function(d) { return d.value; });
+         function change(d3_event, d) {
+           var tag = {};
+           var value = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string

 
 

-                   chips.select('a')
-                       .on('click', removeMultikey)
-                       .attr('class', 'remove')
-                       .text('×');
+           if (!value && typeof _tags[d] !== 'string') return;
+           tag[d] = value || undefined;
+           dispatch.call('change', this, tag);
+         }

 
 

-               } else {
-                   var isMixed = Array.isArray(tags[field.key]);
+         access.options = function (type) {
+           var options = ['no', 'permissive', 'private', 'permit', 'destination'];

 
 

-                   var mixedValues = isMixed && tags[field.key].map(function(val) {
-                       return displayValue(val);
-                   }).filter(Boolean);
+           if (type !== 'access') {
+             options.unshift('yes');
+             options.push('designated');

 
 

-                   utilGetSetValue(input, !isMixed ? displayValue(tags[field.key]) : '')
-                       .attr('title', isMixed ? mixedValues.join('\n') : undefined)
-                       .attr('placeholder', isMixed ? _t('inspector.multiple_values') : _staticPlaceholder || '')
-                       .classed('mixed', isMixed);
-               }
-           };
+             if (type === 'bicycle') {
+               options.push('dismount');
+             }
+           }

 
 

-           function registerDragAndDrop(selection) {
+           return options.map(function (option) {
+             return {
+               title: field.t('options.' + option + '.description'),
+               value: option
+             };
+           });
+         };

 
 

-               // allow drag and drop re-ordering of chips
-               var dragOrigin, targetIndex;
-               selection.call(d3_drag()
-                   .on('start', function() {
-                       dragOrigin = {
-                           x: event.x,
-                           y: event.y
-                       };
-                       targetIndex = null;
-                   })
-                   .on('drag', function(d, index) {
-                       var x = event.x - dragOrigin.x,
-                           y = event.y - dragOrigin.y;
-
-                       if (!select(this).classed('dragging') &&
-                           // don't display drag until dragging beyond a distance threshold
-                           Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) { return; }
-
-                       select(this)
-                           .classed('dragging', true);
-
-                       targetIndex = null;
-                       var targetIndexOffsetTop = null;
-                       var draggedTagWidth = select(this).node().offsetWidth;
-
-                       if (field.key === 'destination') { // meaning tags are full width
-                           container.selectAll('.chip')
-                               .style('transform', function(d2, index2) {
-                                   var node = select(this).node();
-
-                                   if (index === index2) {
-                                       return 'translate(' + x + 'px, ' + y + 'px)';
-                                   // move the dragged tag up the order
-                                   } else if (index2 > index && event.y > node.offsetTop) {
-                                       if (targetIndex === null || index2 > targetIndex) {
-                                           targetIndex = index2;
-                                       }
-                                       return 'translateY(-100%)';
-                                   // move the dragged tag down the order
-                                   } else if (index2 < index && event.y < node.offsetTop + node.offsetHeight) {
-                                       if (targetIndex === null || index2 < targetIndex) {
-                                           targetIndex = index2;
-                                       }
-                                       return 'translateY(100%)';
-                                   }
-                                   return null;
-                               });
-                       } else {
-                           container.selectAll('.chip')
-                               .each(function(d2, index2) {
-                                   var node = select(this).node();
-
-                                   // check the cursor is in the bounding box
-                                   if (
-                                       index !== index2 &&
-                                       event.x < node.offsetLeft + node.offsetWidth + 5 &&
-                                       event.x > node.offsetLeft &&
-                                       event.y < node.offsetTop + node.offsetHeight &&
-                                       event.y > node.offsetTop
-                                   ) {
-                                       targetIndex = index2;
-                                       targetIndexOffsetTop = node.offsetTop;
-                                   }
-                               })
-                               .style('transform', function(d2, index2) {
-                                   var node = select(this).node();
-
-                                   if (index === index2) {
-                                       return 'translate(' + x + 'px, ' + y + 'px)';
-                                   }
-
-                                   // only translate tags in the same row
-                                   if (node.offsetTop === targetIndexOffsetTop) {
-                                       if (index2 < index && index2 >= targetIndex) {
-                                           return 'translateX(' + draggedTagWidth + 'px)';
-                                       } else if (index2 > index && index2 <= targetIndex) {
-                                           return 'translateX(-' + draggedTagWidth + 'px)';
-                                       }
-                                   }
-                                   return null;
-                               });
-                           }
-                   })
-                   .on('end', function(d, index) {
-                       if (!select(this).classed('dragging')) {
-                           return;
-                       }
+         var placeholdersByHighway = {
+           footway: {
+             foot: 'designated',
+             motor_vehicle: 'no'
+           },
+           steps: {
+             foot: 'yes',
+             motor_vehicle: 'no',
+             bicycle: 'no',
+             horse: 'no'
+           },
+           pedestrian: {
+             foot: 'yes',
+             motor_vehicle: 'no'
+           },
+           cycleway: {
+             motor_vehicle: 'no',
+             bicycle: 'designated'
+           },
+           bridleway: {
+             motor_vehicle: 'no',
+             horse: 'designated'
+           },
+           path: {
+             foot: 'yes',
+             motor_vehicle: 'no',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           motorway: {
+             foot: 'no',
+             motor_vehicle: 'yes',
+             bicycle: 'no',
+             horse: 'no'
+           },
+           trunk: {
+             motor_vehicle: 'yes'
+           },
+           primary: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           secondary: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           tertiary: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           residential: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           unclassified: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           service: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           motorway_link: {
+             foot: 'no',
+             motor_vehicle: 'yes',
+             bicycle: 'no',
+             horse: 'no'
+           },
+           trunk_link: {
+             motor_vehicle: 'yes'
+           },
+           primary_link: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           secondary_link: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           tertiary_link: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           }
+         };
+
+         access.tags = function (tags) {
+           _tags = tags;
+           utilGetSetValue(items.selectAll('.preset-input-access'), function (d) {
+             return typeof tags[d] === 'string' ? tags[d] : '';
+           }).classed('mixed', function (d) {
+             return tags[d] && Array.isArray(tags[d]);
+           }).attr('title', function (d) {
+             return tags[d] && Array.isArray(tags[d]) && tags[d].filter(Boolean).join('\n');
+           }).attr('placeholder', function (d) {
+             if (tags[d] && Array.isArray(tags[d])) {
+               return _t('inspector.multiple_values');
+             }

 
 

-                       select(this)
-                           .classed('dragging', false);
+             if (d === 'access') {
+               return 'yes';
+             }

 
 

-                       container.selectAll('.chip')
-                           .style('transform', null);
+             if (tags.access && typeof tags.access === 'string') {
+               return tags.access;
+             }

 
 

-                       if (typeof targetIndex === 'number') {
-                           var element = _multiData[index];
-                           _multiData.splice(index, 1);
-                           _multiData.splice(targetIndex, 0, element);
+             if (tags.highway) {
+               if (typeof tags.highway === 'string') {
+                 if (placeholdersByHighway[tags.highway] && placeholdersByHighway[tags.highway][d]) {
+                   return placeholdersByHighway[tags.highway][d];
+                 }
+               } else {
+                 var impliedAccesses = tags.highway.filter(Boolean).map(function (highwayVal) {
+                   return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
+                 }).filter(Boolean);

 
 

-                           var t = {};
+                 if (impliedAccesses.length === tags.highway.length && new Set(impliedAccesses).size === 1) {
+                   // if all the highway values have the same implied access for this type then use that
+                   return impliedAccesses[0];
+                 }
+               }
+             }

 
 

-                           if (_multiData.length) {
-                               t[field.key] = _multiData.map(function(element) {
-                                   return element.key;
-                               }).join(';');
-                           } else {
-                               t[field.key] = undefined;
-                           }
+             return field.placeholder();
+           });
+         };

 
 

-                           dispatch$1.call('change', this, t);
-                       }
-                       dragOrigin = undefined;
-                       targetIndex = undefined;
-                   })
-               );
-           }
+         access.focus = function () {
+           items.selectAll('.preset-input-access').node().focus();
+         };

 
 

+         return utilRebind(access, dispatch, 'on');
+       }

 
 

-           combo.focus = function() {
-               input.node().focus();
-           };
+       function uiFieldAddress(field, context) {
+         var dispatch = dispatch$8('change');

 
 

+         var _selection = select(null);

 
 

-           combo.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               _entityIDs = val;
-               return combo;
-           };
+         var _wrap = select(null);

 
 

+         var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings

 
 

-           function combinedEntityExtent() {
-               return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-           }
+         var _entityIDs = [];

 
 

+         var _tags;

 
 

-           return utilRebind(combo, dispatch$1, 'on');
-       }
+         var _countryCode;

 
 

-       function uiFieldText(field, context) {
-           var dispatch$1 = dispatch('change');
-           var input = select(null);
-           var outlinkButton = select(null);
-           var _entityIDs = [];
-           var _tags;
-           var _phoneFormats = {};
+         var _addressFormats = [{
+           format: [['housenumber', 'street'], ['city', 'postcode']]
+         }];
+         _mainFileFetcher.get('address_formats').then(function (d) {
+           _addressFormats = d;

 
 

-           if (field.type === 'tel') {
-               _mainFileFetcher.get('phone_formats')
-                   .then(function(d) {
-                       _phoneFormats = d;
-                       updatePhonePlaceholder();
-                   })
-                   .catch(function() { /* ignore */ });
+           if (!_selection.empty()) {
+             _selection.call(address);

            }
            }

+         })["catch"](function () {
+           /* ignore */
+         });

 
 

-           function i(selection) {
-               var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
-               var preset = entity && _mainPresetIndex.match(entity, context.graph());
-               var isLocked = preset && preset.suggestion && field.id === 'brand';
-               field.locked(isLocked);
+         function getNearStreets() {
+           var extent = combinedEntityExtent();
+           var l = extent.center();
+           var box = geoExtent(l).padByMeters(200);
+           var streets = context.history().intersects(box).filter(isAddressable).map(function (d) {
+             var loc = context.projection([(extent[0][0] + extent[1][0]) / 2, (extent[0][1] + extent[1][1]) / 2]);
+             var choice = geoChooseEdge(context.graph().childNodes(d), loc, context.projection);
+             return {
+               title: d.tags.name,
+               value: d.tags.name,
+               dist: choice.distance
+             };
+           }).sort(function (a, b) {
+             return a.dist - b.dist;
+           });
+           return utilArrayUniqBy(streets, 'value');

 
 

-               var wrap = selection.selectAll('.form-field-input-wrap')
-                   .data([0]);
+           function isAddressable(d) {
+             return d.tags.highway && d.tags.name && d.type === 'way';
+           }
+         }

 
 

-               wrap = wrap.enter()
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-                   .merge(wrap);
+         function getNearCities() {
+           var extent = combinedEntityExtent();
+           var l = extent.center();
+           var box = geoExtent(l).padByMeters(200);
+           var cities = context.history().intersects(box).filter(isAddressable).map(function (d) {
+             return {
+               title: d.tags['addr:city'] || d.tags.name,
+               value: d.tags['addr:city'] || d.tags.name,
+               dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
+             };
+           }).sort(function (a, b) {
+             return a.dist - b.dist;
+           });
+           return utilArrayUniqBy(cities, 'value');

 
 

-               input = wrap.selectAll('input')
-                   .data([0]);
+           function isAddressable(d) {
+             if (d.tags.name) {
+               if (d.tags.admin_level === '8' && d.tags.boundary === 'administrative') return true;
+               if (d.tags.border_type === 'city') return true;
+               if (d.tags.place === 'city' || d.tags.place === 'town' || d.tags.place === 'village') return true;
+             }

 
 

-               input = input.enter()
-                   .append('input')
-                   .attr('type', field.type === 'identifier' ? 'text' : field.type)
-                   .attr('id', field.domId)
-                   .classed(field.type, true)
-                   .call(utilNoAuto)
-                   .merge(input);
+             if (d.tags['addr:city']) return true;
+             return false;
+           }
+         }

 
 

-               input
-                   .classed('disabled', !!isLocked)
-                   .attr('readonly', isLocked || null)
-                   .on('input', change(true))
-                   .on('blur', change())
-                   .on('change', change());
+         function getNearValues(key) {
+           var extent = combinedEntityExtent();
+           var l = extent.center();
+           var box = geoExtent(l).padByMeters(200);
+           var results = context.history().intersects(box).filter(function hasTag(d) {
+             return _entityIDs.indexOf(d.id) === -1 && d.tags[key];
+           }).map(function (d) {
+             return {
+               title: d.tags[key],
+               value: d.tags[key],
+               dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
+             };
+           }).sort(function (a, b) {
+             return a.dist - b.dist;
+           });
+           return utilArrayUniqBy(results, 'value');
+         }

 
 

+         function updateForCountryCode() {
+           if (!_countryCode) return;
+           var addressFormat;

 
 

-               if (field.type === 'tel') {
-                   updatePhonePlaceholder();
+           for (var i = 0; i < _addressFormats.length; i++) {
+             var format = _addressFormats[i];

 
 

-               } else if (field.type === 'number') {
-                   var rtl = (_mainLocalizer.textDirection() === 'rtl');
+             if (!format.countryCodes) {
+               addressFormat = format; // choose the default format, keep going
+             } else if (format.countryCodes.indexOf(_countryCode) !== -1) {
+               addressFormat = format; // choose the country format, stop here

 
 

-                   input.attr('type', 'text');
+               break;
+             }
+           }

 
 

-                   var buttons = wrap.selectAll('.increment, .decrement')
-                       .data(rtl ? [1, -1] : [-1, 1]);
+           var dropdowns = addressFormat.dropdowns || ['city', 'county', 'country', 'district', 'hamlet', 'neighbourhood', 'place', 'postcode', 'province', 'quarter', 'state', 'street', 'subdistrict', 'suburb'];
+           var widths = addressFormat.widths || {
+             housenumber: 1 / 3,
+             street: 2 / 3,
+             city: 2 / 3,
+             state: 1 / 4,
+             postcode: 1 / 3
+           };

 
 

-                   buttons.enter()
-                       .append('button')
-                       .attr('tabindex', -1)
-                       .attr('class', function(d) {
-                           var which = (d === 1 ? 'increment' : 'decrement');
-                           return 'form-field-button ' + which;
-                       })
-                       .merge(buttons)
-                       .on('click', function(d) {
-                           event.preventDefault();
-                           var raw_vals = input.node().value || '0';
-                           var vals = raw_vals.split(';');
-                           vals = vals.map(function(v) {
-                               var num = parseFloat(v.trim(), 10);
-                               return isFinite(num) ? clamped(num + d) : v.trim();
-                           });
-                           input.node().value = vals.join(';');
-                           change()();
-                       });
-               } else if (field.type === 'identifier' && field.urlFormat && field.pattern) {
+           function row(r) {
+             // Normalize widths.
+             var total = r.reduce(function (sum, key) {
+               return sum + (widths[key] || 0.5);
+             }, 0);
+             return r.map(function (key) {
+               return {
+                 id: key,
+                 width: (widths[key] || 0.5) / total
+               };
+             });
+           }

 
 

-                   input.attr('type', 'text');
+           var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
+             return d.toString();
+           });

 
 

-                   outlinkButton = wrap.selectAll('.foreign-id-permalink')
-                       .data([0]);
+           rows.exit().remove();
+           rows.enter().append('div').attr('class', 'addr-row').selectAll('input').data(row).enter().append('input').property('type', 'text').call(updatePlaceholder).attr('class', function (d) {
+             return 'addr-' + d.id;
+           }).call(utilNoAuto).each(addDropdown).style('width', function (d) {
+             return d.width * 100 + '%';
+           });

 
 

-                   outlinkButton.enter()
-                       .append('button')
-                       .attr('tabindex', -1)
-                       .call(svgIcon('#iD-icon-out-link'))
-                       .attr('class', 'form-field-button foreign-id-permalink')
-                       .attr('title', function() {
-                           var domainResults = /^https?:\/\/(.{1,}?)\//.exec(field.urlFormat);
-                           if (domainResults.length >= 2 && domainResults[1]) {
-                               var domain = domainResults[1];
-                               return _t('icons.view_on', { domain: domain });
-                           }
-                           return '';
-                       })
-                       .on('click', function() {
-                           event.preventDefault();
+           function addDropdown(d) {
+             if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown

 
 

-                           var value = validIdentifierValueForLink();
-                           if (value) {
-                               var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
-                               window.open(url, '_blank');
-                           }
-                       })
-                       .merge(outlinkButton);
-               }
+             var nearValues = d.id === 'street' ? getNearStreets : d.id === 'city' ? getNearCities : getNearValues;
+             select(this).call(uiCombobox(context, 'address-' + d.id).minItems(1).caseSensitive(true).fetcher(function (value, callback) {
+               callback(nearValues('addr:' + d.id));
+             }));

            }
 
            }
 

+           _wrap.selectAll('input').on('blur', change()).on('change', change());

 
 

-           function updatePhonePlaceholder() {
-               if (input.empty() || !Object.keys(_phoneFormats).length) { return; }
+           _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));

 
 

-               var extent = combinedEntityExtent();
-               var countryCode = extent && iso1A2Code(extent.center());
-               var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
-               if (format) { input.attr('placeholder', format); }
-           }
+           if (_tags) updateTags(_tags);
+         }

 
 

+         function address(selection) {
+           _selection = selection;
+           _wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           _wrap = _wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(_wrap);
+           var extent = combinedEntityExtent();

 
 

-           function validIdentifierValueForLink() {
-               if (field.type === 'identifier' && field.pattern) {
-                   var value = utilGetSetValue(input).trim().split(';')[0];
-                   return value && value.match(new RegExp(field.pattern));
-               }
-               return null;
-           }
+           if (extent) {
+             var countryCode;

 
 

+             if (context.inIntro()) {
+               // localize the address format for the walkthrough
+               countryCode = _t('intro.graph.countrycode');
+             } else {
+               var center = extent.center();
+               countryCode = iso1A2Code(center);
+             }

 
 

-           // clamp number to min/max
-           function clamped(num) {
-               if (field.minValue !== undefined) {
-                   num = Math.max(num, field.minValue);
-               }
-               if (field.maxValue !== undefined) {
-                   num = Math.min(num, field.maxValue);
-               }
-               return num;
+             if (countryCode) {
+               _countryCode = countryCode.toLowerCase();
+               updateForCountryCode();
+             }

            }
            }

+         }

 
 

+         function change(onInput) {
+           return function () {
+             var tags = {};

 
 

-           function change(onInput) {
-               return function() {
-                   var t = {};
-                   var val = utilGetSetValue(input);
-                   if (!onInput) { val = context.cleanTagValue(val); }
-
-                   // don't override multiple values with blank string
-                   if (!val && Array.isArray(_tags[field.key])) { return; }
-
-                   if (!onInput) {
-                       if (field.type === 'number' && val) {
-                           var vals = val.split(';');
-                           vals = vals.map(function(v) {
-                               var num = parseFloat(v.trim(), 10);
-                               return isFinite(num) ? clamped(num) : v.trim();
-                           });
-                           val = vals.join(';');
-                       }
-                       utilGetSetValue(input, val);
-                   }
-                   t[field.key] = val || undefined;
-                   dispatch$1.call('change', this, t, onInput);
-               };
-           }
+             _wrap.selectAll('input').each(function (subfield) {
+               var key = field.key + ':' + subfield.id;
+               var value = this.value;
+               if (!onInput) value = context.cleanTagValue(value); // don't override multiple values with blank string

 
 

+               if (Array.isArray(_tags[key]) && !value) return;
+               tags[key] = value || undefined;
+             });

 
 

-           i.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               _entityIDs = val;
-               return i;
+             dispatch.call('change', this, tags, onInput);

            };
            };

+         }

 
 

+         function updatePlaceholder(inputSelection) {
+           return inputSelection.attr('placeholder', function (subfield) {
+             if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
+               return _t('inspector.multiple_values');
+             }

 
 

-           i.tags = function(tags) {
-               _tags = tags;
+             if (_countryCode) {
+               var localkey = subfield.id + '!' + _countryCode;
+               var tkey = addrField.hasTextForStringId('placeholders.' + localkey) ? localkey : subfield.id;
+               return addrField.t('placeholders.' + tkey);
+             }
+           });
+         }

 
 

-               var isMixed = Array.isArray(tags[field.key]);
+         function updateTags(tags) {
+           utilGetSetValue(_wrap.selectAll('input'), function (subfield) {
+             var val = tags[field.key + ':' + subfield.id];
+             return typeof val === 'string' ? val : '';
+           }).attr('title', function (subfield) {
+             var val = tags[field.key + ':' + subfield.id];
+             return val && Array.isArray(val) && val.filter(Boolean).join('\n');
+           }).classed('mixed', function (subfield) {
+             return Array.isArray(tags[field.key + ':' + subfield.id]);
+           }).call(updatePlaceholder);
+         }

 
 

-               utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '')
-                   .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined)
-                   .attr('placeholder', isMixed ? _t('inspector.multiple_values') : (field.placeholder() || _t('inspector.unknown')))
-                   .classed('mixed', isMixed);
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }

 
 

-               if (outlinkButton && !outlinkButton.empty()) {
-                   var disabled = !validIdentifierValueForLink();
-                   outlinkButton.classed('disabled', disabled);
-               }
-           };
+         address.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return address;
+         };

 
 

+         address.tags = function (tags) {
+           _tags = tags;
+           updateTags(tags);
+         };

 
 

-           i.focus = function() {
-               var node = input.node();
-               if (node) { node.focus(); }
-           };
+         address.focus = function () {
+           var node = _wrap.selectAll('input').node();

 
 

-           function combinedEntityExtent() {
-               return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-           }
+           if (node) node.focus();
+         };

 
 

-           return utilRebind(i, dispatch$1, 'on');
+         return utilRebind(address, dispatch, 'on');

        }
 
        }
 

-       function uiFieldAccess(field, context) {
-           var dispatch$1 = dispatch('change');
-           var items = select(null);
-           var _tags;
+       function uiFieldCycleway(field, context) {
+         var dispatch = dispatch$8('change');
+         var items = select(null);
+         var wrap = select(null);

 
 

-           function access(selection) {
-               var wrap = selection.selectAll('.form-field-input-wrap')
-                   .data([0]);
+         var _tags;

 
 

-               wrap = wrap.enter()
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-                   .merge(wrap);
+         function cycleway(selection) {
+           function stripcolon(s) {
+             return s.replace(':', '');
+           }

 
 

-               var list = wrap.selectAll('ul')
-                   .data([0]);
+           wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           var div = wrap.selectAll('ul').data([0]);
+           div = div.enter().append('ul').attr('class', 'rows').merge(div);
+           var keys = ['cycleway:left', 'cycleway:right'];
+           items = div.selectAll('li').data(keys);
+           var enter = items.enter().append('li').attr('class', function (d) {
+             return 'labeled-input preset-cycleway-' + stripcolon(d);
+           });
+           enter.append('span').attr('class', 'label preset-label-cycleway').attr('for', function (d) {
+             return 'preset-input-cycleway-' + stripcolon(d);
+           }).html(function (d) {
+             return field.t.html('types.' + d);
+           });
+           enter.append('div').attr('class', 'preset-input-cycleway-wrap').append('input').attr('type', 'text').attr('class', function (d) {
+             return 'preset-input-cycleway preset-input-' + stripcolon(d);
+           }).call(utilNoAuto).each(function (d) {
+             select(this).call(uiCombobox(context, 'cycleway-' + stripcolon(d)).data(cycleway.options(d)));
+           });
+           items = items.merge(enter); // Update

 
 

-               list = list.enter()
-                   .append('ul')
-                   .attr('class', 'rows')
-                   .merge(list);
+           wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
+         }

 
 

+         function change(d3_event, key) {
+           var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string

 
 

-               items = list.selectAll('li')
-                   .data(field.keys);
+           if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;

 
 

-               // Enter
-               var enter = items.enter()
-                   .append('li')
-                   .attr('class', function(d) { return 'labeled-input preset-access-' + d; });
+           if (newValue === 'none' || newValue === '') {
+             newValue = undefined;
+           }

 
 

-               enter
-                   .append('span')
-                   .attr('class', 'label preset-label-access')
-                   .attr('for', function(d) { return 'preset-input-access-' + d; })
-                   .text(function(d) { return field.t('types.' + d); });
+           var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
+           var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];

 
 

-               enter
-                   .append('div')
-                   .attr('class', 'preset-input-access-wrap')
-                   .append('input')
-                   .attr('type', 'text')
-                   .attr('class', function(d) { return 'preset-input-access preset-input-access-' + d; })
-                   .call(utilNoAuto)
-                   .each(function(d) {
-                       select(this)
-                           .call(uiCombobox(context, 'access-' + d)
-                               .data(access.options(d))
-                           );
-                   });
+           if (otherValue && Array.isArray(otherValue)) {
+             // we must always have an explicit value for comparison
+             otherValue = otherValue[0];
+           }

 
 

+           if (otherValue === 'none' || otherValue === '') {
+             otherValue = undefined;
+           }

 
 

-               // Update
-               items = items.merge(enter);
+           var tag = {}; // If the left and right tags match, use the cycleway tag to tag both
+           // sides the same way

 
 

-               wrap.selectAll('.preset-input-access')
-                   .on('change', change)
-                   .on('blur', change);
+           if (newValue === otherValue) {
+             tag = {
+               cycleway: newValue,
+               'cycleway:left': undefined,
+               'cycleway:right': undefined
+             };
+           } else {
+             // Always set both left and right as changing one can affect the other
+             tag = {
+               cycleway: undefined
+             };
+             tag[key] = newValue;
+             tag[otherKey] = otherValue;

            }
 
            }
 

+           dispatch.call('change', this, tag);
+         }
+
+         cycleway.options = function () {
+           return field.options.map(function (option) {
+             return {
+               title: field.t('options.' + option + '.description'),
+               value: option
+             };
+           });
+         };
+
+         cycleway.tags = function (tags) {
+           _tags = tags; // If cycleway is set, use that instead of individual values

 
 

-           function change(d) {
-               var tag = {};
-               var value = context.cleanTagValue(utilGetSetValue(select(this)));
+           var commonValue = typeof tags.cycleway === 'string' && tags.cycleway;
+           utilGetSetValue(items.selectAll('.preset-input-cycleway'), function (d) {
+             if (commonValue) return commonValue;
+             return !tags.cycleway && typeof tags[d] === 'string' ? tags[d] : '';
+           }).attr('title', function (d) {
+             if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+               var vals = [];

 
 

-               // don't override multiple values with blank string
-               if (!value && typeof _tags[d] !== 'string') { return; }
+               if (Array.isArray(tags.cycleway)) {
+                 vals = vals.concat(tags.cycleway);
+               }

 
 

-               tag[d] = value || undefined;
-               dispatch$1.call('change', this, tag);
-           }
+               if (Array.isArray(tags[d])) {
+                 vals = vals.concat(tags[d]);
+               }

 
 

+               return vals.filter(Boolean).join('\n');
+             }

 
 

-           access.options = function(type) {
-               var options = ['no', 'permissive', 'private', 'permit', 'destination'];
+             return null;
+           }).attr('placeholder', function (d) {
+             if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+               return _t('inspector.multiple_values');
+             }

 
 

-               if (type !== 'access') {
-                   options.unshift('yes');
-                   options.push('designated');
+             return field.placeholder();
+           }).classed('mixed', function (d) {
+             return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
+           });
+         };

 
 

-                   if (type === 'bicycle') {
-                       options.push('dismount');
-                   }
-               }
+         cycleway.focus = function () {
+           var node = wrap.selectAll('input').node();
+           if (node) node.focus();
+         };

 
 

-               return options.map(function(option) {
-                   return {
-                       title: field.t('options.' + option + '.description'),
-                       value: option
-                   };
-               });
-           };
+         return utilRebind(cycleway, dispatch, 'on');
+       }

 
 

+       function uiFieldLanes(field, context) {
+         var dispatch = dispatch$8('change');
+         var LANE_WIDTH = 40;
+         var LANE_HEIGHT = 200;
+         var _entityIDs = [];

 
 

-           var placeholdersByHighway = {
-               footway: {
-                   foot: 'designated',
-                   motor_vehicle: 'no'
-               },
-               steps: {
-                   foot: 'yes',
-                   motor_vehicle: 'no',
-                   bicycle: 'no',
-                   horse: 'no'
-               },
-               pedestrian: {
-                   foot: 'yes',
-                   motor_vehicle: 'no'
-               },
-               cycleway: {
-                   motor_vehicle: 'no',
-                   bicycle: 'designated'
-               },
-               bridleway: {
-                   motor_vehicle: 'no',
-                   horse: 'designated'
-               },
-               path: {
-                   foot: 'yes',
-                   motor_vehicle: 'no',
-                   bicycle: 'yes',
-                   horse: 'yes'
-               },
-               motorway: {
-                   foot: 'no',
-                   motor_vehicle: 'yes',
-                   bicycle: 'no',
-                   horse: 'no'
-               },
-               trunk: {
-                   motor_vehicle: 'yes'
-               },
-               primary: {
-                   foot: 'yes',
-                   motor_vehicle: 'yes',
-                   bicycle: 'yes',
-                   horse: 'yes'
-               },
-               secondary: {
-                   foot: 'yes',
-                   motor_vehicle: 'yes',
-                   bicycle: 'yes',
-                   horse: 'yes'
-               },
-               tertiary: {
-                   foot: 'yes',
-                   motor_vehicle: 'yes',
-                   bicycle: 'yes',
-                   horse: 'yes'
-               },
-               residential: {
-                   foot: 'yes',
-                   motor_vehicle: 'yes',
-                   bicycle: 'yes',
-                   horse: 'yes'
-               },
-               unclassified: {
-                   foot: 'yes',
-                   motor_vehicle: 'yes',
-                   bicycle: 'yes',
-                   horse: 'yes'
-               },
-               service: {
-                   foot: 'yes',
-                   motor_vehicle: 'yes',
-                   bicycle: 'yes',
-                   horse: 'yes'
-               },
-               motorway_link: {
-                   foot: 'no',
-                   motor_vehicle: 'yes',
-                   bicycle: 'no',
-                   horse: 'no'
-               },
-               trunk_link: {
-                   motor_vehicle: 'yes'
-               },
-               primary_link: {
-                   foot: 'yes',
-                   motor_vehicle: 'yes',
-                   bicycle: 'yes',
-                   horse: 'yes'
-               },
-               secondary_link: {
-                   foot: 'yes',
-                   motor_vehicle: 'yes',
-                   bicycle: 'yes',
-                   horse: 'yes'
-               },
-               tertiary_link: {
-                   foot: 'yes',
-                   motor_vehicle: 'yes',
-                   bicycle: 'yes',
-                   horse: 'yes'
-               }
-           };
+         function lanes(selection) {
+           var lanesData = context.entity(_entityIDs[0]).lanes();

 
 

+           if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
+             selection.call(lanes.off);
+             return;
+           }

 
 

-           access.tags = function(tags) {
-               _tags = tags;
-
-               utilGetSetValue(items.selectAll('.preset-input-access'), function(d) {
-                       return typeof tags[d] === 'string' ? tags[d] : '';
-                   })
-                   .classed('mixed', function(d) {
-                       return tags[d] && Array.isArray(tags[d]);
-                   })
-                   .attr('title', function(d) {
-                       return tags[d] && Array.isArray(tags[d]) && tags[d].filter(Boolean).join('\n');
-                   })
-                   .attr('placeholder', function(d) {
-                       if (tags[d] && Array.isArray(tags[d])) {
-                           return _t('inspector.multiple_values');
-                       }
-                       if (d === 'access') {
-                           return 'yes';
-                       }
-                       if (tags.access && typeof tags.access === 'string') {
-                           return tags.access;
-                       }
-                       if (tags.highway) {
-                           if (typeof tags.highway === 'string') {
-                               if (placeholdersByHighway[tags.highway] &&
-                                   placeholdersByHighway[tags.highway][d]) {
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           var surface = wrap.selectAll('.surface').data([0]);
+           var d = utilGetDimensions(wrap);
+           var freeSpace = d[0] - lanesData.lanes.length * LANE_WIDTH * 1.5 + LANE_WIDTH * 0.5;
+           surface = surface.enter().append('svg').attr('width', d[0]).attr('height', 300).attr('class', 'surface').merge(surface);
+           var lanesSelection = surface.selectAll('.lanes').data([0]);
+           lanesSelection = lanesSelection.enter().append('g').attr('class', 'lanes').merge(lanesSelection);
+           lanesSelection.attr('transform', function () {
+             return 'translate(' + freeSpace / 2 + ', 0)';
+           });
+           var lane = lanesSelection.selectAll('.lane').data(lanesData.lanes);
+           lane.exit().remove();
+           var enter = lane.enter().append('g').attr('class', 'lane');
+           enter.append('g').append('rect').attr('y', 50).attr('width', LANE_WIDTH).attr('height', LANE_HEIGHT);
+           enter.append('g').attr('class', 'forward').append('text').attr('y', 40).attr('x', 14).html('▲');
+           enter.append('g').attr('class', 'bothways').append('text').attr('y', 40).attr('x', 14).html('▲▼');
+           enter.append('g').attr('class', 'backward').append('text').attr('y', 40).attr('x', 14).html('▼');
+           lane = lane.merge(enter);
+           lane.attr('transform', function (d) {
+             return 'translate(' + LANE_WIDTH * d.index * 1.5 + ', 0)';
+           });
+           lane.select('.forward').style('visibility', function (d) {
+             return d.direction === 'forward' ? 'visible' : 'hidden';
+           });
+           lane.select('.bothways').style('visibility', function (d) {
+             return d.direction === 'bothways' ? 'visible' : 'hidden';
+           });
+           lane.select('.backward').style('visibility', function (d) {
+             return d.direction === 'backward' ? 'visible' : 'hidden';
+           });
+         }

 
 

-                                   return placeholdersByHighway[tags.highway][d];
-                               }
-                           } else {
-                               var impliedAccesses = tags.highway.filter(Boolean).map(function(highwayVal) {
-                                   return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
-                               }).filter(Boolean);
-
-                               if (impliedAccesses.length === tags.highway.length &&
-                                   new Set(impliedAccesses).size === 1) {
-                                   // if all the highway values have the same implied access for this type then use that
-                                   return impliedAccesses[0];
-                               }
-                           }
-                       }
-                       return field.placeholder();
-                   });
-           };
+         lanes.entityIDs = function (val) {
+           _entityIDs = val;
+         };
+
+         lanes.tags = function () {};
+
+         lanes.focus = function () {};
+
+         lanes.off = function () {};
+
+         return utilRebind(lanes, dispatch, 'on');
+       }
+       uiFieldLanes.supportsMultiselection = false;

 
 

+       var _languagesArray = [];
+       function uiFieldLocalized(field, context) {
+         var dispatch = dispatch$8('change', 'input');
+         var wikipedia = services.wikipedia;
+         var input = select(null);
+         var localizedInputs = select(null);

 
 

-           access.focus = function() {
-               items.selectAll('.preset-input-access')
-                   .node().focus();
-           };
+         var _countryCode;

 
 

+         var _tags; // A concern here in switching to async data means that _languagesArray will not
+         // be available the first time through, so things like the fetchers and
+         // the language() function will not work immediately.

 
 

-           return utilRebind(access, dispatch$1, 'on');
-       }

 
 

-       function uiFieldAddress(field, context) {
-           var dispatch$1 = dispatch('change');
-           var _selection = select(null);
-           var _wrap = select(null);
-           var addrField = _mainPresetIndex.field('address');   // needed for placeholder strings
-
-           var _entityIDs = [];
-           var _tags;
-           var _countryCode;
-           var _addressFormats = [{
-               format: [
-                   ['housenumber', 'street'],
-                   ['city', 'postcode']
-               ]
-             }];
+         _mainFileFetcher.get('languages').then(loadLanguagesArray)["catch"](function () {
+           /* ignore */
+         });
+         var _territoryLanguages = {};
+         _mainFileFetcher.get('territory_languages').then(function (d) {
+           _territoryLanguages = d;
+         })["catch"](function () {
+           /* ignore */
+         }); // reuse these combos

 
 

-           _mainFileFetcher.get('address_formats')
-               .then(function(d) {
-                   _addressFormats = d;
-                   if (!_selection.empty()) {
-                       _selection.call(address);
-                   }
-               })
-               .catch(function() { /* ignore */ });
-
-
-           function getNearStreets() {
-               var extent = combinedEntityExtent();
-               var l = extent.center();
-               var box = geoExtent(l).padByMeters(200);
-
-               var streets = context.history().intersects(box)
-                   .filter(isAddressable)
-                   .map(function(d) {
-                       var loc = context.projection([
-                           (extent[0][0] + extent[1][0]) / 2,
-                           (extent[0][1] + extent[1][1]) / 2
-                       ]);
-                       var choice = geoChooseEdge(context.graph().childNodes(d), loc, context.projection);
-
-                       return {
-                           title: d.tags.name,
-                           value: d.tags.name,
-                           dist: choice.distance
-                       };
-                   })
-                   .sort(function(a, b) {
-                       return a.dist - b.dist;
-                   });
+         var langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);

 
 

-               return utilArrayUniqBy(streets, 'value');
+         var _selection = select(null);

 
 

-               function isAddressable(d) {
-                   return d.tags.highway && d.tags.name && d.type === 'way';
-               }
-           }
+         var _multilingual = [];

 
 

+         var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');

 
 

-           function getNearCities() {
-               var extent = combinedEntityExtent();
-               var l = extent.center();
-               var box = geoExtent(l).padByMeters(200);
+         var _wikiTitles;

 
 

-               var cities = context.history().intersects(box)
-                   .filter(isAddressable)
-                   .map(function(d) {
-                       return {
-                           title: d.tags['addr:city'] || d.tags.name,
-                           value: d.tags['addr:city'] || d.tags.name,
-                           dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
-                       };
-                   })
-                   .sort(function(a, b) {
-                       return a.dist - b.dist;
-                   });
+         var _entityIDs = [];

 
 

-               return utilArrayUniqBy(cities, 'value');
+         function loadLanguagesArray(dataLanguages) {
+           if (_languagesArray.length !== 0) return; // some conversion is needed to ensure correct OSM tags are used

 
 

+           var replacements = {
+             sr: 'sr-Cyrl',
+             // in OSM, `sr` implies Cyrillic
+             'sr-Cyrl': false // `sr-Cyrl` isn't used in OSM

 
 

-               function isAddressable(d) {
-                   if (d.tags.name) {
-                       if (d.tags.admin_level === '8' && d.tags.boundary === 'administrative')
-                           { return true; }
-                       if (d.tags.border_type === 'city')
-                           { return true; }
-                       if (d.tags.place === 'city' || d.tags.place === 'town' || d.tags.place === 'village')
-                           { return true; }
-                   }
+           };

 
 

-                   if (d.tags['addr:city'])
-                       { return true; }
+           for (var code in dataLanguages) {
+             if (replacements[code] === false) continue;
+             var metaCode = code;
+             if (replacements[code]) metaCode = replacements[code];

 
 

-                   return false;
-               }
+             _languagesArray.push({
+               localName: _mainLocalizer.languageName(metaCode, {
+                 localOnly: true
+               }),
+               nativeName: dataLanguages[metaCode].nativeName,
+               code: code,
+               label: _mainLocalizer.languageName(metaCode)
+             });

            }
            }

+         }

 
 

-           function getNearValues(key) {
-               var extent = combinedEntityExtent();
-               var l = extent.center();
-               var box = geoExtent(l).padByMeters(200);
+         function calcLocked() {
+           // Protect name field for suggestion presets that don't display a brand/operator field
+           var isLocked = field.id === 'name' && _entityIDs.length && _entityIDs.some(function (entityID) {
+             var entity = context.graph().hasEntity(entityID);
+             if (!entity) return false; // Features linked to Wikidata are likely important and should be protected

 
 

-               var results = context.history().intersects(box)
-                   .filter(function hasTag(d) { return _entityIDs.indexOf(d.id) === -1 && d.tags[key]; })
-                   .map(function(d) {
-                       return {
-                           title: d.tags[key],
-                           value: d.tags[key],
-                           dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
-                       };
-                   })
-                   .sort(function(a, b) {
-                       return a.dist - b.dist;
-                   });
+             if (entity.tags.wikidata) return true; // Assume the name has already been confirmed if its source has been researched

 
 

-               return utilArrayUniqBy(results, 'value');
-           }
+             if (entity.tags['name:etymology:wikidata']) return true; // Lock the `name` if this is a suggestion preset that assigns the name,
+             // and the preset does not display a `brand` or `operator` field.
+             // (For presets like hotels, car dealerships, post offices, the `name` should remain editable)
+             // see also similar logic in `outdated_tags.js`
+
+             var preset = _mainPresetIndex.match(entity, context.graph());
+
+             if (preset) {
+               var isSuggestion = preset.suggestion;
+               var fields = preset.fields();
+               var showsBrandField = fields.some(function (d) {
+                 return d.id === 'brand';
+               });
+               var showsOperatorField = fields.some(function (d) {
+                 return d.id === 'operator';
+               });
+               var setsName = preset.addTags.name;
+               var setsBrandWikidata = preset.addTags['brand:wikidata'];
+               var setsOperatorWikidata = preset.addTags['operator:wikidata'];
+               return isSuggestion && setsName && (setsBrandWikidata && !showsBrandField || setsOperatorWikidata && !showsOperatorField);
+             }

 
 

+             return false;
+           });

 
 

-           function updateForCountryCode() {
+           field.locked(isLocked);
+         } // update _multilingual, maintaining the existing order

 
 

-               if (!_countryCode) { return; }

 
 

-               var addressFormat;
-               for (var i = 0; i < _addressFormats.length; i++) {
-                   var format = _addressFormats[i];
-                   if (!format.countryCodes) {
-                       addressFormat = format;   // choose the default format, keep going
-                   } else if (format.countryCodes.indexOf(_countryCode) !== -1) {
-                       addressFormat = format;   // choose the country format, stop here
-                       break;
-                   }
-               }
+         function calcMultilingual(tags) {
+           var existingLangsOrdered = _multilingual.map(function (item) {
+             return item.lang;
+           });

 
 

-               var dropdowns = addressFormat.dropdowns || [
-                   'city', 'county', 'country', 'district', 'hamlet',
-                   'neighbourhood', 'place', 'postcode', 'province',
-                   'quarter', 'state', 'street', 'subdistrict', 'suburb'
-               ];
+           var existingLangs = new Set(existingLangsOrdered.filter(Boolean));

 
 

-               var widths = addressFormat.widths || {
-                   housenumber: 1/3, street: 2/3,
-                   city: 2/3, state: 1/4, postcode: 1/3
-               };
+           for (var k in tags) {
+             var m = k.match(/^(.*):(.*)$/);

 
 

-               function row(r) {
-                   // Normalize widths.
-                   var total = r.reduce(function(sum, key) {
-                       return sum + (widths[key] || 0.5);
-                   }, 0);
+             if (m && m[1] === field.key && m[2]) {
+               var item = {
+                 lang: m[2],
+                 value: tags[k]
+               };

 
 

-                   return r.map(function(key) {
-                       return {
-                           id: key,
-                           width: (widths[key] || 0.5) / total
-                       };
-                   });
+               if (existingLangs.has(item.lang)) {
+                 // update the value
+                 _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
+                 existingLangs["delete"](item.lang);
+               } else {
+                 _multilingual.push(item);

                }
                }

+             }
+           } // Don't remove items based on deleted tags, since this makes the UI
+           // disappear unexpectedly when clearing values - #8164

 
 

-               var rows = _wrap.selectAll('.addr-row')
-                   .data(addressFormat.format, function(d) {
-                       return d.toString();
-                   });

 
 

-               rows.exit()
-                   .remove();
+           _multilingual.forEach(function (item) {
+             if (item.lang && existingLangs.has(item.lang)) {
+               item.value = '';
+             }
+           });
+         }

 
 

-               rows
-                   .enter()
-                   .append('div')
-                   .attr('class', 'addr-row')
-                   .selectAll('input')
-                   .data(row)
-                   .enter()
-                   .append('input')
-                   .property('type', 'text')
-                   .call(updatePlaceholder)
-                   .attr('class', function (d) { return 'addr-' + d.id; })
-                   .call(utilNoAuto)
-                   .each(addDropdown)
-                   .style('width', function (d) { return d.width * 100 + '%'; });
-
-
-               function addDropdown(d) {
-                   if (dropdowns.indexOf(d.id) === -1) { return; }  // not a dropdown
-
-                   var nearValues = (d.id === 'street') ? getNearStreets
-                       : (d.id === 'city') ? getNearCities
-                       : getNearValues;
-
-                   select(this)
-                       .call(uiCombobox(context, 'address-' + d.id)
-                           .minItems(1)
-                           .caseSensitive(true)
-                           .fetcher(function(value, callback) {
-                               callback(nearValues('addr:' + d.id));
-                           })
-                       );
-               }
+         function localized(selection) {
+           _selection = selection;
+           calcLocked();
+           var isLocked = field.locked();
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]); // enter/update

 
 

-               _wrap.selectAll('input')
-                   .on('blur', change())
-                   .on('change', change());
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           input = wrap.selectAll('.localized-main').data([0]); // enter/update

 
 

-               _wrap.selectAll('input:not(.combobox-input)')
-                   .on('input', change(true));
+           input = input.enter().append('input').attr('type', 'text').attr('id', field.domId).attr('class', 'localized-main').call(utilNoAuto).merge(input);
+           input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
+           var translateButton = wrap.selectAll('.localized-add').data([0]);
+           translateButton = translateButton.enter().append('button').attr('class', 'localized-add form-field-button').call(svgIcon('#iD-icon-plus')).merge(translateButton);
+           translateButton.classed('disabled', !!isLocked).call(isLocked ? _buttonTip.destroy : _buttonTip).on('click', addNew);

 
 

-               if (_tags) { updateTags(_tags); }
+           if (_tags && !_multilingual.length) {
+             calcMultilingual(_tags);

            }
 
            }
 

+           localizedInputs = selection.selectAll('.localized-multilingual').data([0]);
+           localizedInputs = localizedInputs.enter().append('div').attr('class', 'localized-multilingual').merge(localizedInputs);
+           localizedInputs.call(renderMultilingual);
+           localizedInputs.selectAll('button, input').classed('disabled', !!isLocked).attr('readonly', isLocked || null);

 
 

-           function address(selection) {
-               _selection = selection;
+           function addNew(d3_event) {
+             d3_event.preventDefault();
+             if (field.locked()) return;
+             var defaultLang = _mainLocalizer.languageCode().toLowerCase();

 
 

-               _wrap = selection.selectAll('.form-field-input-wrap')
-                   .data([0]);
+             var langExists = _multilingual.find(function (datum) {
+               return datum.lang === defaultLang;
+             });

 
 

-               _wrap = _wrap.enter()
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-                   .merge(_wrap);
+             var isLangEn = defaultLang.indexOf('en') > -1;

 
 

-               var extent = combinedEntityExtent();
+             if (isLangEn || langExists) {
+               defaultLang = '';
+               langExists = _multilingual.find(function (datum) {
+                 return datum.lang === defaultLang;
+               });
+             }

 
 

-               if (extent) {
-                   var countryCode;
-                   if (context.inIntro()) {
-                       // localize the address format for the walkthrough
-                       countryCode = _t('intro.graph.countrycode');
-                   } else {
-                       var center = extent.center();
-                       countryCode = iso1A2Code(center);
-                   }
-                   if (countryCode) {
-                       _countryCode = countryCode.toLowerCase();
-                       updateForCountryCode();
-                   }
-               }
-           }
+             if (!langExists) {
+               // prepend the value so it appears at the top
+               _multilingual.unshift({
+                 lang: defaultLang,
+                 value: ''
+               });

 
 

+               localizedInputs.call(renderMultilingual);
+             }
+           }

 
            function change(onInput) {
 
            function change(onInput) {

-               return function() {
-                   var tags = {};
+             return function (d3_event) {
+               if (field.locked()) {
+                 d3_event.preventDefault();
+                 return;
+               }

 
 

-                   _wrap.selectAll('input')
-                       .each(function (subfield) {
-                           var key = field.key + ':' + subfield.id;
+               var val = utilGetSetValue(select(this));
+               if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string

 
 

-                           var value = this.value;
-                           if (!onInput) { value = context.cleanTagValue(value); }
+               if (!val && Array.isArray(_tags[field.key])) return;
+               var t = {};
+               t[field.key] = val || undefined;
+               dispatch.call('change', this, t, onInput);
+             };
+           }
+         }

 
 

-                           // don't override multiple values with blank string
-                           if (Array.isArray(_tags[key]) && !value) { return; }
+         function key(lang) {
+           return field.key + ':' + lang;
+         }

 
 

-                           tags[key] = value || undefined;
-                       });
+         function changeLang(d3_event, d) {
+           var tags = {}; // make sure unrecognized suffixes are lowercase - #7156

 
 

-                   dispatch$1.call('change', this, tags, onInput);
-               };
-           }
+           var lang = utilGetSetValue(select(this)).toLowerCase();

 
 

-           function updatePlaceholder(inputSelection) {
-               return inputSelection.attr('placeholder', function(subfield) {
-                   if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
-                       return _t('inspector.multiple_values');
-                   }
-                   if (_countryCode) {
-                       var localkey = subfield.id + '!' + _countryCode;
-                       var tkey = addrField.strings.placeholders[localkey] ? localkey : subfield.id;
-                       return addrField.t('placeholders.' + tkey);
-                   }
-               });
-           }
+           var language = _languagesArray.find(function (d) {
+             return d.label.toLowerCase() === lang || d.localName && d.localName.toLowerCase() === lang || d.nativeName && d.nativeName.toLowerCase() === lang;
+           });

 
 

+           if (language) lang = language.code;

 
 

-           function updateTags(tags) {
-               utilGetSetValue(_wrap.selectAll('input'), function (subfield) {
-                       var val = tags[field.key + ':' + subfield.id];
-                       return typeof val === 'string' ? val : '';
-                   })
-                   .attr('title', function(subfield) {
-                       var val = tags[field.key + ':' + subfield.id];
-                       return val && Array.isArray(val) && val.filter(Boolean).join('\n');
-                   })
-                   .classed('mixed', function(subfield) {
-                       return Array.isArray(tags[field.key + ':' + subfield.id]);
-                   })
-                   .call(updatePlaceholder);
+           if (d.lang && d.lang !== lang) {
+             tags[key(d.lang)] = undefined;

            }
 
            }
 

+           var newKey = lang && context.cleanTagKey(key(lang));
+           var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));

 
 

-           function combinedEntityExtent() {
-               return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+           if (newKey && value) {
+             tags[newKey] = value;
+           } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
+             tags[newKey] = _wikiTitles[d.lang];

            }
 
            }
 

+           d.lang = lang;
+           dispatch.call('change', this, tags);
+         }

 
 

-           address.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               _entityIDs = val;
-               return address;
-           };
+         function changeValue(d3_event, d) {
+           if (!d.lang) return;
+           var value = context.cleanTagValue(utilGetSetValue(select(this))) || undefined; // don't override multiple values with blank string

 
 

+           if (!value && Array.isArray(d.value)) return;
+           var t = {};
+           t[key(d.lang)] = value;
+           d.value = value;
+           dispatch.call('change', this, t);
+         }

 
 

-           address.tags = function(tags) {
-               _tags = tags;
-               updateTags(tags);
-           };
+         function fetchLanguages(value, cb) {
+           var v = value.toLowerCase(); // show the user's language first

 
 

+           var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];

 
 

-           address.focus = function() {
-               var node = _wrap.selectAll('input').node();
-               if (node) { node.focus(); }
-           };
+           if (_countryCode && _territoryLanguages[_countryCode]) {
+             langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
+           }

 
 

+           var langItems = [];
+           langCodes.forEach(function (code) {
+             var langItem = _languagesArray.find(function (item) {
+               return item.code === code;
+             });

 
 

-           return utilRebind(address, dispatch$1, 'on');
-       }
+             if (langItem) langItems.push(langItem);
+           });
+           langItems = utilArrayUniq(langItems.concat(_languagesArray));
+           cb(langItems.filter(function (d) {
+             return d.label.toLowerCase().indexOf(v) >= 0 || d.localName && d.localName.toLowerCase().indexOf(v) >= 0 || d.nativeName && d.nativeName.toLowerCase().indexOf(v) >= 0 || d.code.toLowerCase().indexOf(v) >= 0;
+           }).map(function (d) {
+             return {
+               value: d.label
+             };
+           }));
+         }

 
 

-       function uiFieldCycleway(field, context) {
-           var dispatch$1 = dispatch('change');
-           var items = select(null);
-           var wrap = select(null);
-           var _tags;
+         function renderMultilingual(selection) {
+           var entries = selection.selectAll('div.entry').data(_multilingual, function (d) {
+             return d.lang;
+           });
+           entries.exit().style('top', '0').style('max-height', '240px').transition().duration(200).style('opacity', '0').style('max-height', '0px').remove();
+           var entriesEnter = entries.enter().append('div').attr('class', 'entry').each(function (_, index) {
+             var wrap = select(this);
+             var domId = utilUniqueDomId(index);
+             var label = wrap.append('label').attr('class', 'field-label').attr('for', domId);
+             var text = label.append('span').attr('class', 'label-text');
+             text.append('span').attr('class', 'label-textvalue').html(_t.html('translate.localized_translation_label'));
+             text.append('span').attr('class', 'label-textannotation');
+             label.append('button').attr('class', 'remove-icon-multilingual').on('click', function (d3_event, d) {
+               if (field.locked()) return;
+               d3_event.preventDefault(); // remove the UI item manually
+
+               _multilingual.splice(_multilingual.indexOf(d), 1);
+
+               var langKey = d.lang && key(d.lang);
+
+               if (langKey && langKey in _tags) {
+                 delete _tags[langKey]; // remove from entity tags
+
+                 var t = {};
+                 t[langKey] = undefined;
+                 dispatch.call('change', this, t);
+                 return;
+               }

 
 

-           function cycleway(selection) {
+               renderMultilingual(selection);
+             }).call(svgIcon('#iD-operation-delete'));
+             wrap.append('input').attr('class', 'localized-lang').attr('id', domId).attr('type', 'text').attr('placeholder', _t('translate.localized_translation_language')).on('blur', changeLang).on('change', changeLang).call(langCombo);
+             wrap.append('input').attr('type', 'text').attr('class', 'localized-value').on('blur', changeValue).on('change', changeValue);
+           });
+           entriesEnter.style('margin-top', '0px').style('max-height', '0px').style('opacity', '0').transition().duration(200).style('margin-top', '10px').style('max-height', '240px').style('opacity', '1').on('end', function () {
+             select(this).style('max-height', '').style('overflow', 'visible');
+           });
+           entries = entries.merge(entriesEnter);
+           entries.order(); // allow removing the entry UIs even if there isn't a tag to remove

 
 

-               function stripcolon(s) {
-                   return s.replace(':', '');
-               }
+           entries.classed('present', true);
+           utilGetSetValue(entries.select('.localized-lang'), function (d) {
+             var langItem = _languagesArray.find(function (item) {
+               return item.code === d.lang;
+             });
+
+             if (langItem) return langItem.label;
+             return d.lang;
+           });
+           utilGetSetValue(entries.select('.localized-value'), function (d) {
+             return typeof d.value === 'string' ? d.value : '';
+           }).attr('title', function (d) {
+             return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : null;
+           }).attr('placeholder', function (d) {
+             return Array.isArray(d.value) ? _t('inspector.multiple_values') : _t('translate.localized_translation_name');
+           }).classed('mixed', function (d) {
+             return Array.isArray(d.value);
+           });
+         }

 
 

+         localized.tags = function (tags) {
+           _tags = tags; // Fetch translations from wikipedia

 
 

-               wrap = selection.selectAll('.form-field-input-wrap')
-                   .data([0]);
+           if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
+             _wikiTitles = {};
+             var wm = tags.wikipedia.match(/([^:]+):(.+)/);

 
 

-               wrap = wrap.enter()
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-                   .merge(wrap);
+             if (wm && wm[0] && wm[1]) {
+               wikipedia.translations(wm[1], wm[2], function (err, d) {
+                 if (err || !d) return;
+                 _wikiTitles = d;
+               });
+             }
+           }
+
+           var isMixed = Array.isArray(tags[field.key]);
+           utilGetSetValue(input, typeof tags[field.key] === 'string' ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
+           calcMultilingual(tags);

 
 

+           _selection.call(localized);
+         };

 
 

-               var div = wrap.selectAll('ul')
-                   .data([0]);
+         localized.focus = function () {
+           input.node().focus();
+         };

 
 

-               div = div.enter()
-                   .append('ul')
-                   .attr('class', 'rows')
-                   .merge(div);
+         localized.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _multilingual = [];
+           loadCountryCode();
+           return localized;
+         };

 
 

-               var keys = ['cycleway:left', 'cycleway:right'];
+         function loadCountryCode() {
+           var extent = combinedEntityExtent();
+           var countryCode = extent && iso1A2Code(extent.center());
+           _countryCode = countryCode && countryCode.toLowerCase();
+         }

 
 

-               items = div.selectAll('li')
-                   .data(keys);
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }

 
 

-               var enter = items.enter()
-                   .append('li')
-                   .attr('class', function(d) { return 'labeled-input preset-cycleway-' + stripcolon(d); });
+         return utilRebind(localized, dispatch, 'on');
+       }

 
 

-               enter
-                   .append('span')
-                   .attr('class', 'label preset-label-cycleway')
-                   .attr('for', function(d) { return 'preset-input-cycleway-' + stripcolon(d); })
-                   .text(function(d) { return field.t('types.' + d); });
+       function uiFieldRoadheight(field, context) {
+         var dispatch = dispatch$8('change');
+         var primaryUnitInput = select(null);
+         var primaryInput = select(null);
+         var secondaryInput = select(null);
+         var secondaryUnitInput = select(null);
+         var _entityIDs = [];

 
 

-               enter
-                   .append('div')
-                   .attr('class', 'preset-input-cycleway-wrap')
-                   .append('input')
-                   .attr('type', 'text')
-                   .attr('class', function(d) { return 'preset-input-cycleway preset-input-' + stripcolon(d); })
-                   .call(utilNoAuto)
-                   .each(function(d) {
-                       select(this)
-                           .call(uiCombobox(context, 'cycleway-' + stripcolon(d))
-                               .data(cycleway.options(d))
-                           );
-                   });
+         var _tags;

 
 

-               items = items.merge(enter);
+         var _isImperial;

 
 

-               // Update
-               wrap.selectAll('.preset-input-cycleway')
-                   .on('change', change)
-                   .on('blur', change);
-           }
+         var primaryUnits = [{
+           value: 'm',
+           title: _t('inspector.roadheight.meter')
+         }, {
+           value: 'ft',
+           title: _t('inspector.roadheight.foot')
+         }];
+         var unitCombo = uiCombobox(context, 'roadheight-unit').data(primaryUnits);
+
+         function roadheight(selection) {
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           primaryInput = wrap.selectAll('input.roadheight-number').data([0]);
+           primaryInput = primaryInput.enter().append('input').attr('type', 'text').attr('class', 'roadheight-number').attr('id', field.domId).call(utilNoAuto).merge(primaryInput);
+           primaryInput.on('change', change).on('blur', change);
+           var loc = combinedEntityExtent().center();
+           _isImperial = roadHeightUnit(loc) === 'ft';
+           primaryUnitInput = wrap.selectAll('input.roadheight-unit').data([0]);
+           primaryUnitInput = primaryUnitInput.enter().append('input').attr('type', 'text').attr('class', 'roadheight-unit').call(unitCombo).merge(primaryUnitInput);
+           primaryUnitInput.on('blur', changeUnits).on('change', changeUnits);
+           secondaryInput = wrap.selectAll('input.roadheight-secondary-number').data([0]);
+           secondaryInput = secondaryInput.enter().append('input').attr('type', 'text').attr('class', 'roadheight-secondary-number').call(utilNoAuto).merge(secondaryInput);
+           secondaryInput.on('change', change).on('blur', change);
+           secondaryUnitInput = wrap.selectAll('input.roadheight-secondary-unit').data([0]);
+           secondaryUnitInput = secondaryUnitInput.enter().append('input').attr('type', 'text').call(utilNoAuto).classed('disabled', true).classed('roadheight-secondary-unit', true).attr('readonly', 'readonly').merge(secondaryUnitInput);
+
+           function changeUnits() {
+             _isImperial = utilGetSetValue(primaryUnitInput) === 'ft';
+             utilGetSetValue(primaryUnitInput, _isImperial ? 'ft' : 'm');
+             setUnitSuggestions();
+             change();
+           }
+         }
+
+         function setUnitSuggestions() {
+           utilGetSetValue(primaryUnitInput, _isImperial ? 'ft' : 'm');
+         }
+
+         function change() {
+           var tag = {};
+           var primaryValue = utilGetSetValue(primaryInput).trim();
+           var secondaryValue = utilGetSetValue(secondaryInput).trim(); // don't override multiple values with blank string
+
+           if (!primaryValue && !secondaryValue && Array.isArray(_tags[field.key])) return;
+
+           if (!primaryValue && !secondaryValue) {
+             tag[field.key] = undefined;
+           } else if (isNaN(primaryValue) || isNaN(secondaryValue) || !_isImperial) {
+             tag[field.key] = context.cleanTagValue(primaryValue);
+           } else {
+             if (primaryValue !== '') {
+               primaryValue = context.cleanTagValue(primaryValue + '\'');
+             }

 
 

+             if (secondaryValue !== '') {
+               secondaryValue = context.cleanTagValue(secondaryValue + '"');
+             }

 
 

-           function change(key) {
+             tag[field.key] = primaryValue + secondaryValue;
+           }

 
 

-               var newValue = context.cleanTagValue(utilGetSetValue(select(this)));
+           dispatch.call('change', this, tag);
+         }

 
 

-               // don't override multiple values with blank string
-               if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) { return; }
+         roadheight.tags = function (tags) {
+           _tags = tags;
+           var primaryValue = tags[field.key];
+           var secondaryValue;
+           var isMixed = Array.isArray(primaryValue);

 
 

-               if (newValue === 'none' || newValue === '') { newValue = undefined; }
+           if (!isMixed) {
+             if (primaryValue && (primaryValue.indexOf('\'') >= 0 || primaryValue.indexOf('"') >= 0)) {
+               secondaryValue = primaryValue.match(/(-?[\d.]+)"/);

 
 

-               var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
-               var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
-               if (otherValue && Array.isArray(otherValue)) {
-                   // we must always have an explicit value for comparison
-                   otherValue = otherValue[0];
+               if (secondaryValue !== null) {
+                 secondaryValue = secondaryValue[1];

                }
                }

-               if (otherValue === 'none' || otherValue === '') { otherValue = undefined; }

 
 

-               var tag = {};
+               primaryValue = primaryValue.match(/(-?[\d.]+)'/);

 
 

-               // If the left and right tags match, use the cycleway tag to tag both
-               // sides the same way
-               if (newValue === otherValue) {
-                   tag = {
-                       cycleway: newValue,
-                       'cycleway:left': undefined,
-                       'cycleway:right': undefined
-                   };
-               } else {
-                   // Always set both left and right as changing one can affect the other
-                   tag = {
-                       cycleway: undefined
-                   };
-                   tag[key] = newValue;
-                   tag[otherKey] = otherValue;
+               if (primaryValue !== null) {
+                 primaryValue = primaryValue[1];

                }
 
                }
 

-               dispatch$1.call('change', this, tag);
+               _isImperial = true;
+             } else if (primaryValue) {
+               _isImperial = false;
+             }

            }
 
            }
 

+           setUnitSuggestions();
+           utilGetSetValue(primaryInput, typeof primaryValue === 'string' ? primaryValue : '').attr('title', isMixed ? primaryValue.filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : _t('inspector.unknown')).classed('mixed', isMixed);
+           utilGetSetValue(secondaryInput, typeof secondaryValue === 'string' ? secondaryValue : '').attr('placeholder', isMixed ? _t('inspector.multiple_values') : _isImperial ? '0' : null).classed('mixed', isMixed).classed('disabled', !_isImperial).attr('readonly', _isImperial ? null : 'readonly');
+           secondaryUnitInput.attr('value', _isImperial ? _t('inspector.roadheight.inch') : null);
+         };

 
 

-           cycleway.options = function() {
-               return Object.keys(field.strings.options).map(function(option) {
-                   return {
-                       title: field.t('options.' + option + '.description'),
-                       value: option
-                   };
-               });
-           };
-
-
-           cycleway.tags = function(tags) {
-               _tags = tags;
+         roadheight.focus = function () {
+           primaryInput.node().focus();
+         };

 
 

-               // If cycleway is set, use that instead of individual values
-               var commonValue = typeof tags.cycleway === 'string' && tags.cycleway;
+         roadheight.entityIDs = function (val) {
+           _entityIDs = val;
+         };

 
 

-               utilGetSetValue(items.selectAll('.preset-input-cycleway'), function(d) {
-                       if (commonValue) { return commonValue; }
-                       return !tags.cycleway && typeof tags[d] === 'string' ? tags[d] : '';
-                   })
-                   .attr('title', function(d) {
-                       if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
-                           var vals = [];
-                           if (Array.isArray(tags.cycleway)) {
-                               vals = vals.concat(tags.cycleway);
-                           }
-                           if (Array.isArray(tags[d])) {
-                               vals = vals.concat(tags[d]);
-                           }
-                           return vals.filter(Boolean).join('\n');
-                       }
-                       return null;
-                   })
-                   .attr('placeholder', function(d) {
-                       if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
-                           return _t('inspector.multiple_values');
-                       }
-                       return field.placeholder();
-                   })
-                   .classed('mixed', function(d) {
-                       return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
-                   });
-           };
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }

 
 

+         return utilRebind(roadheight, dispatch, 'on');
+       }

 
 

-           cycleway.focus = function() {
-               var node = wrap.selectAll('input').node();
-               if (node) { node.focus(); }
-           };
+       function uiFieldRoadspeed(field, context) {
+         var dispatch = dispatch$8('change');
+         var unitInput = select(null);
+         var input = select(null);
+         var _entityIDs = [];

 
 

+         var _tags;

 
 

-           return utilRebind(cycleway, dispatch$1, 'on');
-       }
+         var _isImperial;

 
 

-       function uiFieldLanes(field, context) {
-           var dispatch$1 = dispatch('change');
-           var LANE_WIDTH = 40;
-           var LANE_HEIGHT = 200;
-           var _entityIDs = [];
+         var speedCombo = uiCombobox(context, 'roadspeed');
+         var unitCombo = uiCombobox(context, 'roadspeed-unit').data(['km/h', 'mph'].map(comboValues));
+         var metricValues = [20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120];
+         var imperialValues = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80];

 
 

-           function lanes(selection) {
-               var lanesData = context.entity(_entityIDs[0]).lanes();
+         function roadspeed(selection) {
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           input = wrap.selectAll('input.roadspeed-number').data([0]);
+           input = input.enter().append('input').attr('type', 'text').attr('class', 'roadspeed-number').attr('id', field.domId).call(utilNoAuto).call(speedCombo).merge(input);
+           input.on('change', change).on('blur', change);
+           var loc = combinedEntityExtent().center();
+           _isImperial = roadSpeedUnit(loc) === 'mph';
+           unitInput = wrap.selectAll('input.roadspeed-unit').data([0]);
+           unitInput = unitInput.enter().append('input').attr('type', 'text').attr('class', 'roadspeed-unit').call(unitCombo).merge(unitInput);
+           unitInput.on('blur', changeUnits).on('change', changeUnits);

 
 

-               if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
-                   selection.call(lanes.off);
-                   return;
-               }
+           function changeUnits() {
+             _isImperial = utilGetSetValue(unitInput) === 'mph';
+             utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+             setUnitSuggestions();
+             change();
+           }
+         }

 
 

-               var wrap = selection.selectAll('.form-field-input-wrap')
-                   .data([0]);
+         function setUnitSuggestions() {
+           speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
+           utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+         }

 
 

-               wrap = wrap.enter()
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-                   .merge(wrap);
+         function comboValues(d) {
+           return {
+             value: d.toString(),
+             title: d.toString()
+           };
+         }

 
 

-               var surface =  wrap.selectAll('.surface')
-                   .data([0]);
+         function change() {
+           var tag = {};
+           var value = utilGetSetValue(input).trim(); // don't override multiple values with blank string

 
 

-               var d = utilGetDimensions(wrap);
-               var freeSpace = d[0] - lanesData.lanes.length * LANE_WIDTH * 1.5 + LANE_WIDTH * 0.5;
+           if (!value && Array.isArray(_tags[field.key])) return;

 
 

-               surface = surface.enter()
-                   .append('svg')
-                   .attr('width', d[0])
-                   .attr('height', 300)
-                   .attr('class', 'surface')
-                   .merge(surface);
+           if (!value) {
+             tag[field.key] = undefined;
+           } else if (isNaN(value) || !_isImperial) {
+             tag[field.key] = context.cleanTagValue(value);
+           } else {
+             tag[field.key] = context.cleanTagValue(value + ' mph');
+           }

 
 

+           dispatch.call('change', this, tag);
+         }

 
 

-               var lanesSelection = surface.selectAll('.lanes')
-                   .data([0]);
+         roadspeed.tags = function (tags) {
+           _tags = tags;
+           var value = tags[field.key];
+           var isMixed = Array.isArray(value);
+
+           if (!isMixed) {
+             if (value && value.indexOf('mph') >= 0) {
+               value = parseInt(value, 10).toString();
+               _isImperial = true;
+             } else if (value) {
+               _isImperial = false;
+             }
+           }

 
 

-               lanesSelection = lanesSelection.enter()
-                   .append('g')
-                   .attr('class', 'lanes')
-                   .merge(lanesSelection);
+           setUnitSuggestions();
+           utilGetSetValue(input, typeof value === 'string' ? value : '').attr('title', isMixed ? value.filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
+         };

 
 

-               lanesSelection
-                   .attr('transform', function () {
-                       return 'translate(' + (freeSpace / 2) + ', 0)';
-                   });
+         roadspeed.focus = function () {
+           input.node().focus();
+         };

 
 

+         roadspeed.entityIDs = function (val) {
+           _entityIDs = val;
+         };

 
 

-               var lane = lanesSelection.selectAll('.lane')
-                  .data(lanesData.lanes);
-
-               lane.exit()
-                   .remove();
-
-               var enter = lane.enter()
-                   .append('g')
-                   .attr('class', 'lane');
-
-               enter
-                   .append('g')
-                   .append('rect')
-                   .attr('y', 50)
-                   .attr('width', LANE_WIDTH)
-                   .attr('height', LANE_HEIGHT);
-
-               enter
-                   .append('g')
-                   .attr('class', 'forward')
-                   .append('text')
-                   .attr('y', 40)
-                   .attr('x', 14)
-                   .text('▲');
-
-               enter
-                   .append('g')
-                   .attr('class', 'bothways')
-                   .append('text')
-                   .attr('y', 40)
-                   .attr('x', 14)
-                   .text('▲▼');
-
-               enter
-                   .append('g')
-                   .attr('class', 'backward')
-                   .append('text')
-                   .attr('y', 40)
-                   .attr('x', 14)
-                   .text('▼');
-
-
-               lane = lane
-                   .merge(enter);
-
-               lane
-                   .attr('transform', function(d) {
-                       return 'translate(' + (LANE_WIDTH * d.index * 1.5) + ', 0)';
-                   });
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }

 
 

-               lane.select('.forward')
-                   .style('visibility', function(d) {
-                       return d.direction === 'forward' ? 'visible' : 'hidden';
-                   });
+         return utilRebind(roadspeed, dispatch, 'on');
+       }

 
 

-               lane.select('.bothways')
-                   .style('visibility', function(d) {
-                       return d.direction === 'bothways' ? 'visible' : 'hidden';
-                   });
+       function uiFieldRadio(field, context) {
+         var dispatch = dispatch$8('change');
+         var placeholder = select(null);
+         var wrap = select(null);
+         var labels = select(null);
+         var radios = select(null);
+         var radioData = (field.options || field.keys).slice(); // shallow copy
+
+         var typeField;
+         var layerField;
+         var _oldType = {};
+         var _entityIDs = [];
+
+         function selectedKey() {
+           var node = wrap.selectAll('.form-field-input-radio label.active input');
+           return !node.empty() && node.datum();
+         }
+
+         function radio(selection) {
+           selection.classed('preset-radio', true);
+           wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           var enter = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-radio');
+           enter.append('span').attr('class', 'placeholder');
+           wrap = wrap.merge(enter);
+           placeholder = wrap.selectAll('.placeholder');
+           labels = wrap.selectAll('label').data(radioData);
+           enter = labels.enter().append('label');
+           enter.append('input').attr('type', 'radio').attr('name', field.id).attr('value', function (d) {
+             return field.t('options.' + d, {
+               'default': d
+             });
+           }).attr('checked', false);
+           enter.append('span').html(function (d) {
+             return field.t.html('options.' + d, {
+               'default': d
+             });
+           });
+           labels = labels.merge(enter);
+           radios = labels.selectAll('input').on('change', changeRadio);
+         }
+
+         function structureExtras(selection, tags) {
+           var selected = selectedKey() || tags.layer !== undefined;
+           var type = _mainPresetIndex.field(selected);
+           var layer = _mainPresetIndex.field('layer');
+           var showLayer = selected === 'bridge' || selected === 'tunnel' || tags.layer !== undefined;
+           var extrasWrap = selection.selectAll('.structure-extras-wrap').data(selected ? [0] : []);
+           extrasWrap.exit().remove();
+           extrasWrap = extrasWrap.enter().append('div').attr('class', 'structure-extras-wrap').merge(extrasWrap);
+           var list = extrasWrap.selectAll('ul').data([0]);
+           list = list.enter().append('ul').attr('class', 'rows').merge(list); // Type
+
+           if (type) {
+             if (!typeField || typeField.id !== selected) {
+               typeField = uiField(context, type, _entityIDs, {
+                 wrap: false
+               }).on('change', changeType);
+             }

 
 

-               lane.select('.backward')
-                   .style('visibility', function(d) {
-                       return d.direction === 'backward' ? 'visible' : 'hidden';
-                   });
+             typeField.tags(tags);
+           } else {
+             typeField = null;

            }
 
            }
 

+           var typeItem = list.selectAll('.structure-type-item').data(typeField ? [typeField] : [], function (d) {
+             return d.id;
+           }); // Exit

 
 

-           lanes.entityIDs = function(val) {
-               _entityIDs = val;
-           };
+           typeItem.exit().remove(); // Enter

 
 

-           lanes.tags = function() {};
-           lanes.focus = function() {};
-           lanes.off = function() {};
+           var typeEnter = typeItem.enter().insert('li', ':first-child').attr('class', 'labeled-input structure-type-item');
+           typeEnter.append('span').attr('class', 'label structure-label-type').attr('for', 'preset-input-' + selected).html(_t.html('inspector.radio.structure.type'));
+           typeEnter.append('div').attr('class', 'structure-input-type-wrap'); // Update

 
 

-           return utilRebind(lanes, dispatch$1, 'on');
-       }
+           typeItem = typeItem.merge(typeEnter);

 
 

-       uiFieldLanes.supportsMultiselection = false;
+           if (typeField) {
+             typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
+           } // Layer

 
 

-       var _languagesArray = [];

 
 

+           if (layer && showLayer) {
+             if (!layerField) {
+               layerField = uiField(context, layer, _entityIDs, {
+                 wrap: false
+               }).on('change', changeLayer);
+             }

 
 

-       function uiFieldLocalized(field, context) {
-           var dispatch$1 = dispatch('change', 'input');
-           var wikipedia = services.wikipedia;
-           var input = select(null);
-           var localizedInputs = select(null);
-           var _countryCode;
-           var _tags;
+             layerField.tags(tags);
+             field.keys = utilArrayUnion(field.keys, ['layer']);
+           } else {
+             layerField = null;
+             field.keys = field.keys.filter(function (k) {
+               return k !== 'layer';
+             });
+           }

 
 

+           var layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit

 
 

-           // A concern here in switching to async data means that _languagesArray will not
-           // be available the first time through, so things like the fetchers and
-           // the language() function will not work immediately.
-           _mainFileFetcher.get('languages')
-               .then(loadLanguagesArray)
-               .catch(function() { /* ignore */ });
+           layerItem.exit().remove(); // Enter

 
 

-           var _territoryLanguages = {};
-           _mainFileFetcher.get('territory_languages')
-               .then(function(d) { _territoryLanguages = d; })
-               .catch(function() { /* ignore */ });
+           var layerEnter = layerItem.enter().append('li').attr('class', 'labeled-input structure-layer-item');
+           layerEnter.append('span').attr('class', 'label structure-label-layer').attr('for', 'preset-input-layer').html(_t.html('inspector.radio.structure.layer'));
+           layerEnter.append('div').attr('class', 'structure-input-layer-wrap'); // Update

 
 

+           layerItem = layerItem.merge(layerEnter);

 
 

-           var allSuggestions = _mainPresetIndex.collection.filter(function(p) {
-               return p.suggestion === true;
-           });
+           if (layerField) {
+             layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
+           }
+         }

 
 

-           // reuse these combos
-           var langCombo = uiCombobox(context, 'localized-lang')
-               .fetcher(fetchLanguages)
-               .minItems(0);
+         function changeType(t, onInput) {
+           var key = selectedKey();
+           if (!key) return;
+           var val = t[key];

 
 

-           var brandCombo = uiCombobox(context, 'localized-brand')
-               .canAutocomplete(false)
-               .minItems(1);
+           if (val !== 'no') {
+             _oldType[key] = val;
+           }

 
 

-           var _selection = select(null);
-           var _multilingual = [];
-           var _buttonTip = uiTooltip()
-               .title(_t('translate.translate'))
-               .placement('left');
-           var _wikiTitles;
-           var _entityIDs = [];
+           if (field.type === 'structureRadio') {
+             // remove layer if it should not be set
+             if (val === 'no' || key !== 'bridge' && key !== 'tunnel' || key === 'tunnel' && val === 'building_passage') {
+               t.layer = undefined;
+             } // add layer if it should be set

 
 
 
 

-           function loadLanguagesArray(dataLanguages) {
-               if (_languagesArray.length !== 0) { return; }
+             if (t.layer === undefined) {
+               if (key === 'bridge' && val !== 'no') {
+                 t.layer = '1';
+               }

 
 

-               // some conversion is needed to ensure correct OSM tags are used
-               var replacements = {
-                   sr: 'sr-Cyrl',      // in OSM, `sr` implies Cyrillic
-                   'sr-Cyrl': false    // `sr-Cyrl` isn't used in OSM
-               };
+               if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
+                 t.layer = '-1';
+               }
+             }
+           }

 
 

-               for (var code in dataLanguages) {
-                   if (replacements[code] === false) { continue; }
-                   var metaCode = code;
-                   if (replacements[code]) { metaCode = replacements[code]; }
+           dispatch.call('change', this, t, onInput);
+         }

 
 

-                   _languagesArray.push({
-                       localName: _mainLocalizer.languageName(metaCode, { localOnly: true }),
-                       nativeName: dataLanguages[metaCode].nativeName,
-                       code: code,
-                       label: _mainLocalizer.languageName(metaCode)
-                   });
-               }
+         function changeLayer(t, onInput) {
+           if (t.layer === '0') {
+             t.layer = undefined;

            }
 
            }
 

+           dispatch.call('change', this, t, onInput);
+         }
+
+         function changeRadio() {
+           var t = {};
+           var activeKey;

 
 

-           function calcLocked() {
+           if (field.key) {
+             t[field.key] = undefined;
+           }

 
 

-               // only lock the Name field
-               var isLocked = field.id === 'name' &&
-                   _entityIDs.length &&
-                   // lock the field if any feature needs it
-                   _entityIDs.some(function(entityID) {
+           radios.each(function (d) {
+             var active = select(this).property('checked');
+             if (active) activeKey = d;

 
 

-                       var entity = context.graph().hasEntity(entityID);
-                       if (!entity) { return false; }
+             if (field.key) {
+               if (active) t[field.key] = d;
+             } else {
+               var val = _oldType[activeKey] || 'yes';
+               t[d] = active ? val : undefined;
+             }
+           });

 
 

-                       var original = context.graph().base().entities[_entityIDs[0]];
-                       var hasOriginalName = original && entity.tags.name && entity.tags.name === original.tags.name;
-                       // if the name was already edited manually then allow further editing
-                       if (!hasOriginalName) { return false; }
+           if (field.type === 'structureRadio') {
+             if (activeKey === 'bridge') {
+               t.layer = '1';
+             } else if (activeKey === 'tunnel' && t.tunnel !== 'building_passage') {
+               t.layer = '-1';
+             } else {
+               t.layer = undefined;
+             }
+           }

 
 

-                       // features linked to Wikidata are likely important and should be protected
-                       if (entity.tags.wikidata) { return true; }
+           dispatch.call('change', this, t);
+         }

 
 

-                       // assume the name has already been confirmed if its source has been researched
-                       if (entity.tags['name:etymology:wikidata']) { return true; }
+         radio.tags = function (tags) {
+           radios.property('checked', function (d) {
+             if (field.key) {
+               return tags[field.key] === d;
+             }

 
 

-                       var preset = _mainPresetIndex.match(entity, context.graph());
-                       var isSuggestion = preset && preset.suggestion;
-                       var showsBrand = preset && preset.originalFields.filter(function(d) {
-                           return d.id === 'brand';
-                       }).length;
-                       // protect standardized brand names
-                       return isSuggestion && !showsBrand;
-                   });
+             return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
+           });

 
 

-               field.locked(isLocked);
+           function isMixed(d) {
+             if (field.key) {
+               return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
+             }
+
+             return Array.isArray(tags[d]);

            }
 
            }
 

+           labels.classed('active', function (d) {
+             if (field.key) {
+               return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
+             }

 
 

-           // update _multilingual, maintaining the existing order
-           function calcMultilingual(tags) {
-               var existingLangsOrdered = _multilingual.map(function(item) {
-                   return item.lang;
-               });
-               var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
+             return Array.isArray(tags[d]) || !!(tags[d] && tags[d].toLowerCase() !== 'no');
+           }).classed('mixed', isMixed).attr('title', function (d) {
+             return isMixed(d) ? _t('inspector.unshared_value_tooltip') : null;
+           });
+           var selection = radios.filter(function () {
+             return this.checked;
+           });

 
 

-               for (var k in tags) {
-                   var m = k.match(/^(.*):([a-zA-Z_-]+)$/);
-                   if (m && m[1] === field.key && m[2]) {
-                       var item = { lang: m[2], value: tags[k] };
-                       if (existingLangs.has(item.lang)) {
-                           // update the value
-                           _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
-                           existingLangs.delete(item.lang);
-                       } else {
-                           _multilingual.push(item);
-                       }
-                   }
-               }
+           if (selection.empty()) {
+             placeholder.html(_t.html('inspector.none'));
+           } else {
+             placeholder.html(selection.attr('value'));
+             _oldType[selection.datum()] = tags[selection.datum()];
+           }

 
 

-               _multilingual = _multilingual.filter(function(item) {
-                   return !item.lang || !existingLangs.has(item.lang);
-               });
+           if (field.type === 'structureRadio') {
+             // For waterways without a tunnel tag, set 'culvert' as
+             // the _oldType to default to if the user picks 'tunnel'
+             if (!!tags.waterway && !_oldType.tunnel) {
+               _oldType.tunnel = 'culvert';
+             }
+
+             wrap.call(structureExtras, tags);

            }
            }

+         };

 
 

+         radio.focus = function () {
+           radios.node().focus();
+         };

 
 

-           function localized(selection) {
-               _selection = selection;
-               calcLocked();
-               var isLocked = field.locked();
-               var singularEntity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
-               var preset = singularEntity && _mainPresetIndex.match(singularEntity, context.graph());
+         radio.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _oldType = {};
+           return radio;
+         };

 
 

-               var wrap = selection.selectAll('.form-field-input-wrap')
-                   .data([0]);
+         radio.isAllowed = function () {
+           return _entityIDs.length === 1;
+         };

 
 

-               // enter/update
-               wrap = wrap.enter()
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-                   .merge(wrap);
-
-               input = wrap.selectAll('.localized-main')
-                   .data([0]);
-
-               // enter/update
-               input = input.enter()
-                   .append('input')
-                   .attr('type', 'text')
-                   .attr('id', field.domId)
-                   .attr('class', 'localized-main')
-                   .call(utilNoAuto)
-                   .merge(input);
-
-               if (preset && field.id === 'name') {
-                   var pTag = preset.id.split('/', 2);
-                   var pKey = pTag[0];
-                   var pValue = pTag[1];
-
-                   if (!preset.suggestion) {
-                       // Not a suggestion preset - Add a suggestions dropdown if it makes sense to.
-                       // This code attempts to determine if the matched preset is the
-                       // kind of preset that even can benefit from name suggestions..
-                       // - true = shops, cafes, hotels, etc. (also generic and fallback presets)
-                       // - false = churches, parks, hospitals, etc. (things not in the index)
-                       var isFallback = preset.isFallback();
-                       var goodSuggestions = allSuggestions.filter(function(s) {
-                           if (isFallback) { return true; }
-                           var sTag = s.id.split('/', 2);
-                           var sKey = sTag[0];
-                           var sValue = sTag[1];
-                           return pKey === sKey && (!pValue || pValue === sValue);
-                       });
+         return utilRebind(radio, dispatch, 'on');
+       }

 
 

-                       // Show the suggestions.. If the user picks one, change the tags..
-                       if (allSuggestions.length && goodSuggestions.length) {
-                           input
-                               .on('blur.localized', checkBrandOnBlur)
-                               .call(brandCombo
-                                   .fetcher(fetchBrandNames(preset, allSuggestions))
-                                   .on('accept', acceptBrand)
-                                   .on('cancel', cancelBrand)
-                               );
-                       }
-                   }
-               }
+       function uiFieldRestrictions(field, context) {
+         var dispatch = dispatch$8('change');
+         var breathe = behaviorBreathe();
+         corePreferences('turn-restriction-via-way', null); // remove old key

 
 

-               input
-                   .classed('disabled', !!isLocked)
-                   .attr('readonly', isLocked || null)
-                   .on('input', change(true))
-                   .on('blur', change())
-                   .on('change', change());
+         var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922

 
 

+         var storedDistance = corePreferences('turn-restriction-distance');

 
 

-               var translateButton = wrap.selectAll('.localized-add')
-                   .data([0]);
+         var _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;

 
 

-               translateButton = translateButton.enter()
-                   .append('button')
-                   .attr('class', 'localized-add form-field-button')
-                   .attr('tabindex', -1)
-                   .call(svgIcon('#iD-icon-plus'))
-                   .merge(translateButton);
+         var _maxDistance = storedDistance ? +storedDistance : 30;

 
 

-               translateButton
-                   .classed('disabled', !!isLocked)
-                   .call(isLocked ? _buttonTip.destroy : _buttonTip)
-                   .on('click', addNew);
+         var _initialized = false;

 
 

+         var _parent = select(null); // the entire field

 
 

-               if (_tags && !_multilingual.length) {
-                   calcMultilingual(_tags);
-               }

 
 

-               localizedInputs = selection.selectAll('.localized-multilingual')
-                   .data([0]);
+         var _container = select(null); // just the map

 
 

-               localizedInputs = localizedInputs.enter()
-                   .append('div')
-                   .attr('class', 'localized-multilingual')
-                   .merge(localizedInputs);

 
 

-               localizedInputs
-                   .call(renderMultilingual);
+         var _oldTurns;

 
 

-               localizedInputs.selectAll('button, input')
-                   .classed('disabled', !!isLocked)
-                   .attr('readonly', isLocked || null);
+         var _graph;

 
 

+         var _vertexID;

 
 

+         var _intersection;

 
 

-               // We are not guaranteed to get an `accept` or `cancel` when blurring the field.
-               // (This can happen if the user actives the combo, arrows down, and then clicks off to blur)
-               // So compare the current field value against the suggestions one last time.
-               function checkBrandOnBlur() {
-                   var latest = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
-                   if (!latest) { return; }   // deleting the entity blurred the field?
+         var _fromWayID;

 
 

-                   var preset = _mainPresetIndex.match(latest, context.graph());
-                   if (preset && preset.suggestion) { return; }   // already accepted
+         var _lastXPos;

 
 

-                   // note: here we are testing against "decorated" names, i.e. 'Starbucks – Cafe'
-                   var name = utilGetSetValue(input).trim();
-                   var matched = allSuggestions.filter(function(s) { return name === s.name(); });
+         function restrictions(selection) {
+           _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed

 
 

-                   if (matched.length === 1) {
-                       acceptBrand({ suggestion: matched[0] });
-                   } else {
-                       cancelBrand();
-                   }
-               }
+           if (_vertexID && (context.graph() !== _graph || !_intersection)) {
+             _graph = context.graph();
+             _intersection = osmIntersection(_graph, _vertexID, _maxDistance);
+           } // It's possible for there to be no actual intersection here.
+           // for example, a vertex of two `highway=path`
+           // In this case, hide the field.

 
 
 
 

-               function acceptBrand(d) {
+           var isOK = _intersection && _intersection.vertices.length && // has vertices
+           _intersection.vertices // has the vertex that the user selected
+           .filter(function (vertex) {
+             return vertex.id === _vertexID;
+           }).length && _intersection.ways.length > 2 && // has more than 2 ways
+           _intersection.ways // has more than 1 TO way
+           .filter(function (way) {
+             return way.__to;
+           }).length > 1; // Also hide in the case where

 
 

-                   var entity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
+           select(selection.node().parentNode).classed('hide', !isOK); // if form field is hidden or has detached from dom, clean up.

 
 

-                   if (!d || !entity) {
-                       cancelBrand();
-                       return;
-                   }
+           if (!isOK || !context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode || !selection.node().parentNode.parentNode) {
+             selection.call(restrictions.off);
+             return;
+           }

 
 

-                   var tags = entity.tags;
-                   var geometry = entity.geometry(context.graph());
-                   var removed = preset.unsetTags(tags, geometry);
-                   for (var k in tags) {
-                       tags[k] = removed[k];  // set removed tags to `undefined`
-                   }
-                   tags = d.suggestion.setTags(tags, geometry);
-                   utilGetSetValue(input, tags.name);
-                   dispatch$1.call('change', this, tags);
-               }
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           var container = wrap.selectAll('.restriction-container').data([0]); // enter

 
 

+           var containerEnter = container.enter().append('div').attr('class', 'restriction-container');
+           containerEnter.append('div').attr('class', 'restriction-help'); // update

 
 

-               // user hit escape, clean whatever preset name appears after the last ' – '
-               function cancelBrand() {
-                   var name = utilGetSetValue(input);
-                   var clean = cleanName(name);
-                   if (clean !== name) {
-                       utilGetSetValue(input, clean);
-                       dispatch$1.call('change', this, { name: clean });
-                   }
-               }
+           _container = containerEnter.merge(container).call(renderViewer);
+           var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update

 
 

-               // Remove whatever is after the last ' – '
-               // NOTE: split/join on en-dash, not a hypen (to avoid conflict with fr - nl names in Brussels etc)
-               function cleanName(name) {
-                   var parts = name.split(' – ');
-                   if (parts.length > 1) {
-                       parts.pop();
-                       name = parts.join(' – ');
-                   }
-                   return name;
-               }
-
-
-               function fetchBrandNames(preset, suggestions) {
-                   var pTag = preset.id.split('/', 2);
-                   var pKey = pTag[0];
-                   var pValue = pTag[1];
-
-                   return function(value, callback) {
-                       var results = [];
-                       if (value && value.length > 2) {
-                           for (var i = 0; i < suggestions.length; i++) {
-                               var s = suggestions[i];
-
-                               // don't suggest brands from incompatible countries
-                               if (_countryCode && s.countryCodes &&
-                                   s.countryCodes.indexOf(_countryCode) === -1) { continue; }
-
-                               var sTag = s.id.split('/', 2);
-                               var sKey = sTag[0];
-                               var sValue = sTag[1];
-                               var name = s.name();
-                               var dist = utilEditDistance(value, name.substring(0, value.length));
-                               var matchesPreset = (pKey === sKey && (!pValue || pValue === sValue));
-
-                               if (dist < 1 || (matchesPreset && dist < 3)) {
-                                   var obj = {
-                                       title: name,
-                                       value: name,
-                                       suggestion: s,
-                                       dist: dist + (matchesPreset ? 0 : 1)  // penalize if not matched preset
-                                   };
-                                   results.push(obj);
-                               }
-                           }
-                           results.sort(function(a, b) { return a.dist - b.dist; });
-                       }
-                       results = results.slice(0, 10);
-                       callback(results);
-                   };
-               }
+           controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
+         }

 
 

+         function renderControls(selection) {
+           var distControl = selection.selectAll('.restriction-distance').data([0]);
+           distControl.exit().remove();
+           var distControlEnter = distControl.enter().append('div').attr('class', 'restriction-control restriction-distance');
+           distControlEnter.append('span').attr('class', 'restriction-control-label restriction-distance-label').html(_t.html('restriction.controls.distance') + ':');
+           distControlEnter.append('input').attr('class', 'restriction-distance-input').attr('type', 'range').attr('min', '20').attr('max', '50').attr('step', '5');
+           distControlEnter.append('span').attr('class', 'restriction-distance-text'); // update

 
 

-               function addNew() {
-                   event.preventDefault();
-                   if (field.locked()) { return; }
+           selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
+             var val = select(this).property('value');
+             _maxDistance = +val;
+             _intersection = null;

 
 

-                   var defaultLang = _mainLocalizer.languageCode().toLowerCase();
-                   var langExists = _multilingual.find(function(datum) { return datum.lang === defaultLang; });
-                   var isLangEn = defaultLang.indexOf('en') > -1;
-                   if (isLangEn || langExists) {
-                       defaultLang = '';
-                       langExists = _multilingual.find(function(datum) { return datum.lang === defaultLang; });
-                   }
+             _container.selectAll('.layer-osm .layer-turns *').remove();

 
 

-                   if (!langExists) {
-                       // prepend the value so it appears at the top
-                       _multilingual.unshift({ lang: defaultLang, value: '' });
+             corePreferences('turn-restriction-distance', _maxDistance);

 
 

-                       localizedInputs
-                           .call(renderMultilingual);
-                   }
-               }
+             _parent.call(restrictions);
+           });
+           selection.selectAll('.restriction-distance-text').html(displayMaxDistance(_maxDistance));
+           var viaControl = selection.selectAll('.restriction-via-way').data([0]);
+           viaControl.exit().remove();
+           var viaControlEnter = viaControl.enter().append('div').attr('class', 'restriction-control restriction-via-way');
+           viaControlEnter.append('span').attr('class', 'restriction-control-label restriction-via-way-label').html(_t.html('restriction.controls.via') + ':');
+           viaControlEnter.append('input').attr('class', 'restriction-via-way-input').attr('type', 'range').attr('min', '0').attr('max', '2').attr('step', '1');
+           viaControlEnter.append('span').attr('class', 'restriction-via-way-text'); // update

 
 

+           selection.selectAll('.restriction-via-way-input').property('value', _maxViaWay).on('input', function () {
+             var val = select(this).property('value');
+             _maxViaWay = +val;

 
 

-               function change(onInput) {
-                   return function() {
-                       if (field.locked()) {
-                           event.preventDefault();
-                           return;
-                       }
+             _container.selectAll('.layer-osm .layer-turns *').remove();

 
 

-                       var val = utilGetSetValue(select(this));
-                       if (!onInput) { val = context.cleanTagValue(val); }
+             corePreferences('turn-restriction-via-way0', _maxViaWay);

 
 

-                       // don't override multiple values with blank string
-                       if (!val && Array.isArray(_tags[field.key])) { return; }
+             _parent.call(restrictions);
+           });
+           selection.selectAll('.restriction-via-way-text').html(displayMaxVia(_maxViaWay));
+         }
+
+         function renderViewer(selection) {
+           if (!_intersection) return;
+           var vgraph = _intersection.graph;
+           var filter = utilFunctor(true);
+           var projection = geoRawMercator(); // Reflow warning: `utilGetDimensions` calls `getBoundingClientRect`
+           // Instead of asking the restriction-container for its dimensions,
+           //  we can ask the .sidebar, which can have its dimensions cached.
+           // width: calc as sidebar - padding
+           // height: hardcoded (from `80_app.css`)
+           // var d = utilGetDimensions(selection);
+
+           var sdims = utilGetDimensions(context.container().select('.sidebar'));
+           var d = [sdims[0] - 50, 370];
+           var c = geoVecScale(d, 0.5);
+           var z = 22;
+           projection.scale(geoZoomToScale(z)); // Calculate extent of all key vertices

 
 

-                       var t = {};
+           var extent = geoExtent();

 
 

-                       t[field.key] = val || undefined;
-                       dispatch$1.call('change', this, t, onInput);
-                   };
-               }
+           for (var i = 0; i < _intersection.vertices.length; i++) {
+             extent._extend(_intersection.vertices[i].extent());
+           } // If this is a large intersection, adjust zoom to fit extent
+
+
+           if (_intersection.vertices.length > 1) {
+             var padding = 180; // in z22 pixels
+
+             var tl = projection([extent[0][0], extent[1][1]]);
+             var br = projection([extent[1][0], extent[0][1]]);
+             var hFactor = (br[0] - tl[0]) / (d[0] - padding);
+             var vFactor = (br[1] - tl[1]) / (d[1] - padding);
+             var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
+             var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
+             z = z - Math.max(hZoomDiff, vZoomDiff);
+             projection.scale(geoZoomToScale(z));

            }
 
            }
 

+           var padTop = 35; // reserve top space for hint text
+
+           var extentCenter = projection(extent.center());
+           extentCenter[1] = extentCenter[1] - padTop;
+           projection.translate(geoVecSubtract(c, extentCenter)).clipExtent([[0, 0], d]);
+           var drawLayers = svgLayers(projection, context).only(['osm', 'touch']).dimensions(d);
+           var drawVertices = svgVertices(projection, context);
+           var drawLines = svgLines(projection, context);
+           var drawTurns = svgTurns(projection, context);
+           var firstTime = selection.selectAll('.surface').empty();
+           selection.call(drawLayers);
+           var surface = selection.selectAll('.surface').classed('tr', true);

 
 

-           function key(lang) {
-               return field.key + ':' + lang;
+           if (firstTime) {
+             _initialized = true;
+             surface.call(breathe);
+           } // This can happen if we've lowered the detail while a FROM way
+           // is selected, and that way is no longer part of the intersection.
+
+
+           if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
+             _fromWayID = null;
+             _oldTurns = null;

            }
 
            }
 

+           surface.call(utilSetDimensions, d).call(drawVertices, vgraph, _intersection.vertices, filter, extent, z).call(drawLines, vgraph, _intersection.ways, filter).call(drawTurns, vgraph, _intersection.turns(_fromWayID, _maxViaWay));
+           surface.on('click.restrictions', click).on('mouseover.restrictions', mouseover);
+           surface.selectAll('.selected').classed('selected', false);
+           surface.selectAll('.related').classed('related', false);
+           var way;

 
 

-           function changeLang(d) {
-               var tags = {};
+           if (_fromWayID) {
+             way = vgraph.entity(_fromWayID);
+             surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+           }

 
 

-               // make sure unrecognized suffixes are lowercase - #7156
-               var lang = utilGetSetValue(select(this)).toLowerCase();
+           document.addEventListener('resizeWindow', function () {
+             utilSetDimensions(_container, null);
+             redraw(1);
+           }, false);
+           updateHints(null);

 
 

-               var language = _languagesArray.find(function(d) {
-                   return d.label.toLowerCase() === lang ||
-                       (d.localName && d.localName.toLowerCase() === lang) ||
-                       (d.nativeName && d.nativeName.toLowerCase() === lang);
-               });
-               if (language) { lang = language.code; }
+           function click(d3_event) {
+             surface.call(breathe.off).call(breathe);
+             var datum = d3_event.target.__data__;
+             var entity = datum && datum.properties && datum.properties.entity;

 
 

-               if (d.lang && d.lang !== lang) {
-                   tags[key(d.lang)] = undefined;
-               }
+             if (entity) {
+               datum = entity;
+             }

 
 

-               var newKey = lang && context.cleanTagKey(key(lang));
+             if (datum instanceof osmWay && (datum.__from || datum.__via)) {
+               _fromWayID = datum.id;
+               _oldTurns = null;
+               redraw();
+             } else if (datum instanceof osmTurn) {
+               var actions, extraActions, turns, i;
+               var restrictionType = osmInferRestriction(vgraph, datum, projection);

 
 

-               var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
+               if (datum.restrictionID && !datum.direct) {
+                 return;
+               } else if (datum.restrictionID && !datum.only) {
+                 // NO -> ONLY
+                 var seen = {};
+                 var datumOnly = JSON.parse(JSON.stringify(datum)); // deep clone the datum

 
 

-               if (newKey && value) {
-                   tags[newKey] = value;
-               } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
-                   tags[newKey] = _wikiTitles[d.lang];
-               }
+                 datumOnly.only = true; // but change this property

 
 

-               d.lang = lang;
-               dispatch$1.call('change', this, tags);
-           }
+                 restrictionType = restrictionType.replace(/^no/, 'only'); // Adding an ONLY restriction should destroy all other direct restrictions from the FROM towards the VIA.
+                 // We will remember them in _oldTurns, and restore them if the user clicks again.

 
 

+                 turns = _intersection.turns(_fromWayID, 2);
+                 extraActions = [];
+                 _oldTurns = [];

 
 

-           function changeValue(d) {
-               if (!d.lang) { return; }
-               var value = context.cleanTagValue(utilGetSetValue(select(this))) || undefined;
+                 for (i = 0; i < turns.length; i++) {
+                   var turn = turns[i];
+                   if (seen[turn.restrictionID]) continue; // avoid deleting the turn twice (#4968, #4928)

 
 

-               // don't override multiple values with blank string
-               if (!value && Array.isArray(d.value)) { return; }
+                   if (turn.direct && turn.path[1] === datum.path[1]) {
+                     seen[turns[i].restrictionID] = true;
+                     turn.restrictionType = osmInferRestriction(vgraph, turn, projection);

 
 

-               var t = {};
-               t[key(d.lang)] = value;
-               d.value = value;
-               dispatch$1.call('change', this, t);
-           }
+                     _oldTurns.push(turn);

 
 

+                     extraActions.push(actionUnrestrictTurn(turn));
+                   }
+                 }

 
 

-           function fetchLanguages(value, cb) {
-               var v = value.toLowerCase();
+                 actions = _intersection.actions.concat(extraActions, [actionRestrictTurn(datumOnly, restrictionType), _t('operations.restriction.annotation.create')]);
+               } else if (datum.restrictionID) {
+                 // ONLY -> Allowed
+                 // Restore whatever restrictions we might have destroyed by cycling thru the ONLY state.
+                 // This relies on the assumption that the intersection was already split up when we
+                 // performed the previous action (NO -> ONLY), so the IDs in _oldTurns shouldn't have changed.
+                 turns = _oldTurns || [];
+                 extraActions = [];

 
 

-               // show the user's language first
-               var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
+                 for (i = 0; i < turns.length; i++) {
+                   if (turns[i].key !== datum.key) {
+                     extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
+                   }
+                 }

 
 

-               if (_countryCode && _territoryLanguages[_countryCode]) {
-                   langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
+                 _oldTurns = null;
+                 actions = _intersection.actions.concat(extraActions, [actionUnrestrictTurn(datum), _t('operations.restriction.annotation.delete')]);
+               } else {
+                 // Allowed -> NO
+                 actions = _intersection.actions.concat([actionRestrictTurn(datum, restrictionType), _t('operations.restriction.annotation.create')]);

                }
 
                }
 

-               var langItems = [];
-               langCodes.forEach(function(code) {
-                   var langItem = _languagesArray.find(function(item) {
-                       return item.code === code;
-                   });
-                   if (langItem) { langItems.push(langItem); }
-               });
-               langItems = utilArrayUniq(langItems.concat(_languagesArray));
-
-               cb(langItems.filter(function(d) {
-                   return d.label.toLowerCase().indexOf(v) >= 0 ||
-                       (d.localName && d.localName.toLowerCase().indexOf(v) >= 0) ||
-                       (d.nativeName && d.nativeName.toLowerCase().indexOf(v) >= 0) ||
-                       d.code.toLowerCase().indexOf(v) >= 0;
-               }).map(function(d) {
-                   return { value: d.label };
-               }));
+               context.perform.apply(context, actions); // At this point the datum will be changed, but will have same key..
+               // Refresh it and update the help..
+
+               var s = surface.selectAll('.' + datum.key);
+               datum = s.empty() ? null : s.datum();
+               updateHints(datum);
+             } else {
+               _fromWayID = null;
+               _oldTurns = null;
+               redraw();
+             }

            }
 
            }
 

+           function mouseover(d3_event) {
+             var datum = d3_event.target.__data__;
+             updateHints(datum);
+           }

 
 

-           function renderMultilingual(selection) {
-               var entries = selection.selectAll('div.entry')
-                   .data(_multilingual, function(d) { return d.lang; });
+           _lastXPos = _lastXPos || sdims[0];

 
 

-               entries.exit()
-                   .style('top', '0')
-                   .style('max-height', '240px')
-                   .transition()
-                   .duration(200)
-                   .style('opacity', '0')
-                   .style('max-height', '0px')
-                   .remove();
+           function redraw(minChange) {
+             var xPos = -1;

 
 

-               var entriesEnter = entries.enter()
-                   .append('div')
-                   .attr('class', 'entry')
-                   .each(function(_, index) {
-                       var wrap = select(this);
-
-                       var domId = utilUniqueDomId(index);
-
-                       var label = wrap
-                           .append('label')
-                           .attr('class', 'field-label')
-                           .attr('for', domId);
-
-                       var text = label
-                           .append('span')
-                           .attr('class', 'label-text');
-
-                       text
-                           .append('span')
-                           .attr('class', 'label-textvalue')
-                           .text(_t('translate.localized_translation_label'));
-
-                       text
-                           .append('span')
-                           .attr('class', 'label-textannotation');
-
-                       label
-                           .append('button')
-                           .attr('class', 'remove-icon-multilingual')
-                           .on('click', function(d, index) {
-                               if (field.locked()) { return; }
-                               event.preventDefault();
-
-                               if (!d.lang || !d.value) {
-                                   _multilingual.splice(index, 1);
-                                   renderMultilingual(selection);
-                               } else {
-                                   // remove from entity tags
-                                   var t = {};
-                                   t[key(d.lang)] = undefined;
-                                   dispatch$1.call('change', this, t);
-                               }
-
-                           })
-                           .call(svgIcon('#iD-operation-delete'));
-
-                       wrap
-                           .append('input')
-                           .attr('class', 'localized-lang')
-                           .attr('id', domId)
-                           .attr('type', 'text')
-                           .attr('placeholder', _t('translate.localized_translation_language'))
-                           .on('blur', changeLang)
-                           .on('change', changeLang)
-                           .call(langCombo);
-
-                       wrap
-                           .append('input')
-                           .attr('type', 'text')
-                           .attr('class', 'localized-value')
-                           .on('blur', changeValue)
-                           .on('change', changeValue);
-                   });
+             if (minChange) {
+               xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
+             }

 
 

-               entriesEnter
-                   .style('margin-top', '0px')
-                   .style('max-height', '0px')
-                   .style('opacity', '0')
-                   .transition()
-                   .duration(200)
-                   .style('margin-top', '10px')
-                   .style('max-height', '240px')
-                   .style('opacity', '1')
-                   .on('end', function() {
-                       select(this)
-                           .style('max-height', '')
-                           .style('overflow', 'visible');
-                   });
+             if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
+               if (context.hasEntity(_vertexID)) {
+                 _lastXPos = xPos;
+
+                 _container.call(renderViewer);
+               }
+             }
+           }

 
 

-               entries = entries.merge(entriesEnter);
+           function highlightPathsFrom(wayID) {
+             surface.selectAll('.related').classed('related', false).classed('allow', false).classed('restrict', false).classed('only', false);
+             surface.selectAll('.' + wayID).classed('related', true);

 
 

-               entries.order();
+             if (wayID) {
+               var turns = _intersection.turns(wayID, _maxViaWay);

 
 

-               entries.classed('present', function(d) {
-                   return d.lang && d.value;
-               });
+               for (var i = 0; i < turns.length; i++) {
+                 var turn = turns[i];
+                 var ids = [turn.to.way];
+                 var klass = turn.no ? 'restrict' : turn.only ? 'only' : 'allow';

 
 

-               utilGetSetValue(entries.select('.localized-lang'), function(d) {
-                   return _mainLocalizer.languageName(d.lang);
-               });
+                 if (turn.only || turns.length === 1) {
+                   if (turn.via.ways) {
+                     ids = ids.concat(turn.via.ways);
+                   }
+                 } else if (turn.to.way === wayID) {
+                   continue;
+                 }

 
 

-               utilGetSetValue(entries.select('.localized-value'), function(d) {
-                       return typeof d.value === 'string' ? d.value : '';
-                   })
-                   .attr('title', function(d) {
-                       return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : null;
-                   })
-                   .attr('placeholder', function(d) {
-                       return Array.isArray(d.value) ? _t('inspector.multiple_values') : _t('translate.localized_translation_name');
-                   })
-                   .classed('mixed', function(d) {
-                       return Array.isArray(d.value);
-                   });
+                 surface.selectAll(utilEntitySelector(ids)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only');
+               }
+             }

            }
 
            }
 

+           function updateHints(datum) {
+             var help = _container.selectAll('.restriction-help').html('');

 
 

-           localized.tags = function(tags) {
-               _tags = tags;
+             var placeholders = {};
+             ['from', 'via', 'to'].forEach(function (k) {
+               placeholders[k] = '<span class="qualifier">' + _t('restriction.help.' + k) + '</span>';
+             });
+             var entity = datum && datum.properties && datum.properties.entity;

 
 

-               // Fetch translations from wikipedia
-               if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
-                   _wikiTitles = {};
-                   var wm = tags.wikipedia.match(/([^:]+):(.+)/);
-                   if (wm && wm[0] && wm[1]) {
-                       wikipedia.translations(wm[1], wm[2], function(err, d) {
-                           if (err || !d) { return; }
-                           _wikiTitles = d;
-                       });
-                   }
-               }
+             if (entity) {
+               datum = entity;
+             }

 
 

-               var isMixed = Array.isArray(tags[field.key]);
+             if (_fromWayID) {
+               way = vgraph.entity(_fromWayID);
+               surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+             } // Hovering a way
+
+
+             if (datum instanceof osmWay && datum.__from) {
+               way = datum;
+               highlightPathsFrom(_fromWayID ? null : way.id);
+               surface.selectAll('.' + way.id).classed('related', true);
+               var clickSelect = !_fromWayID || _fromWayID !== way.id;
+               help.append('div') // "Click to select FROM {fromName}." / "FROM {fromName}"
+               .html(_t.html('restriction.help.' + (clickSelect ? 'select_from_name' : 'from_name'), {
+                 from: placeholders.from,
+                 fromName: displayName(way.id, vgraph)
+               })); // Hovering a turn arrow
+             } else if (datum instanceof osmTurn) {
+               var restrictionType = osmInferRestriction(vgraph, datum, projection);
+               var turnType = restrictionType.replace(/^(only|no)\_/, '');
+               var indirect = datum.direct === false ? _t.html('restriction.help.indirect') : '';
+               var klass, turnText, nextText;
+
+               if (datum.no) {
+                 klass = 'restrict';
+                 turnText = _t.html('restriction.help.turn.no_' + turnType, {
+                   indirect: indirect
+                 });
+                 nextText = _t.html('restriction.help.turn.only_' + turnType, {
+                   indirect: ''
+                 });
+               } else if (datum.only) {
+                 klass = 'only';
+                 turnText = _t.html('restriction.help.turn.only_' + turnType, {
+                   indirect: indirect
+                 });
+                 nextText = _t.html('restriction.help.turn.allowed_' + turnType, {
+                   indirect: ''
+                 });
+               } else {
+                 klass = 'allow';
+                 turnText = _t.html('restriction.help.turn.allowed_' + turnType, {
+                   indirect: indirect
+                 });
+                 nextText = _t.html('restriction.help.turn.no_' + turnType, {
+                   indirect: ''
+                 });
+               }

 
 

-               utilGetSetValue(input, typeof tags[field.key] === 'string' ? tags[field.key] : '')
-                   .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined)
-                   .attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder())
-                   .classed('mixed', isMixed);
+               help.append('div') // "NO Right Turn (indirect)"
+               .attr('class', 'qualifier ' + klass).html(turnText);
+               help.append('div') // "FROM {fromName} TO {toName}"
+               .html(_t.html('restriction.help.from_name_to_name', {
+                 from: placeholders.from,
+                 fromName: displayName(datum.from.way, vgraph),
+                 to: placeholders.to,
+                 toName: displayName(datum.to.way, vgraph)
+               }));

 
 

-               calcMultilingual(tags);
+               if (datum.via.ways && datum.via.ways.length) {
+                 var names = [];

 
 

-               _selection
-                   .call(localized);
-           };
+                 for (var i = 0; i < datum.via.ways.length; i++) {
+                   var prev = names[names.length - 1];
+                   var curr = displayName(datum.via.ways[i], vgraph);

 
 

+                   if (!prev || curr !== prev) {
+                     // collapse identical names
+                     names.push(curr);
+                   }
+                 }

 
 

-           localized.focus = function() {
-               input.node().focus();
-           };
+                 help.append('div') // "VIA {viaNames}"
+                 .html(_t.html('restriction.help.via_names', {
+                   via: placeholders.via,
+                   viaNames: names.join(', ')
+                 }));
+               }

 
 

+               if (!indirect) {
+                 help.append('div') // Click for "No Right Turn"
+                 .html(_t.html('restriction.help.toggle', {
+                   turn: nextText.trim()
+                 }));
+               }

 
 

-           localized.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               _entityIDs = val;
-               _multilingual = [];
-               loadCountryCode();
-               return localized;
-           };
+               highlightPathsFrom(null);
+               var alongIDs = datum.path.slice();
+               surface.selectAll(utilEntitySelector(alongIDs)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only'); // Hovering empty surface
+             } else {
+               highlightPathsFrom(null);

 
 

-           function loadCountryCode() {
-               var extent = combinedEntityExtent();
-               var countryCode = extent && iso1A2Code(extent.center());
-               _countryCode = countryCode && countryCode.toLowerCase();
+               if (_fromWayID) {
+                 help.append('div') // "FROM {fromName}"
+                 .html(_t.html('restriction.help.from_name', {
+                   from: placeholders.from,
+                   fromName: displayName(_fromWayID, vgraph)
+                 }));
+               } else {
+                 help.append('div') // "Click to select a FROM segment."
+                 .html(_t.html('restriction.help.select_from', {
+                   from: placeholders.from
+                 }));
+               }
+             }

            }
            }

+         }

 
 

-           function combinedEntityExtent() {
-               return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         function displayMaxDistance(maxDist) {
+           var isImperial = !_mainLocalizer.usesMetric();
+           var opts;
+
+           if (isImperial) {
+             var distToFeet = {
+               // imprecise conversion for prettier display
+               20: 70,
+               25: 85,
+               30: 100,
+               35: 115,
+               40: 130,
+               45: 145,
+               50: 160
+             }[maxDist];
+             opts = {
+               distance: _t('units.feet', {
+                 quantity: distToFeet
+               })
+             };
+           } else {
+             opts = {
+               distance: _t('units.meters', {
+                 quantity: maxDist
+               })
+             };

            }
 
            }
 

-           return utilRebind(localized, dispatch$1, 'on');
-       }
+           return _t.html('restriction.controls.distance_up_to', opts);
+         }

 
 

-       function uiFieldMaxspeed(field, context) {
-           var dispatch$1 = dispatch('change');
-           var unitInput = select(null);
-           var input = select(null);
-           var _entityIDs = [];
-           var _tags;
-           var _isImperial;
+         function displayMaxVia(maxVia) {
+           return maxVia === 0 ? _t.html('restriction.controls.via_node_only') : maxVia === 1 ? _t.html('restriction.controls.via_up_to_one') : _t.html('restriction.controls.via_up_to_two');
+         }

 
 

-           var speedCombo = uiCombobox(context, 'maxspeed');
-           var unitCombo = uiCombobox(context, 'maxspeed-unit')
-                   .data(['km/h', 'mph'].map(comboValues));
+         function displayName(entityID, graph) {
+           var entity = graph.entity(entityID);
+           var name = utilDisplayName(entity) || '';
+           var matched = _mainPresetIndex.match(entity, graph);
+           var type = matched && matched.name() || utilDisplayType(entity.id);
+           return name || type;
+         }

 
 

-           var metricValues = [20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120];
-           var imperialValues = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80];
+         restrictions.entityIDs = function (val) {
+           _intersection = null;
+           _fromWayID = null;
+           _oldTurns = null;
+           _vertexID = val[0];
+         };

 
 

+         restrictions.tags = function () {};

 
 

-           function maxspeed(selection) {
+         restrictions.focus = function () {};

 
 

-               var wrap = selection.selectAll('.form-field-input-wrap')
-                   .data([0]);
+         restrictions.off = function (selection) {
+           if (!_initialized) return;
+           selection.selectAll('.surface').call(breathe.off).on('click.restrictions', null).on('mouseover.restrictions', null);
+           select(window).on('resize.restrictions', null);
+         };

 
 

-               wrap = wrap.enter()
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-                   .merge(wrap);
+         return utilRebind(restrictions, dispatch, 'on');
+       }
+       uiFieldRestrictions.supportsMultiselection = false;
+
+       function uiFieldTextarea(field, context) {
+         var dispatch = dispatch$8('change');
+         var input = select(null);
+
+         var _tags;
+
+         function textarea(selection) {
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           input = wrap.selectAll('textarea').data([0]);
+           input = input.enter().append('textarea').attr('id', field.domId).call(utilNoAuto).on('input', change(true)).on('blur', change()).on('change', change()).merge(input);
+         }

 
 

+         function change(onInput) {
+           return function () {
+             var val = utilGetSetValue(input);
+             if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string

 
 

-               input = wrap.selectAll('input.maxspeed-number')
-                   .data([0]);
+             if (!val && Array.isArray(_tags[field.key])) return;
+             var t = {};
+             t[field.key] = val || undefined;
+             dispatch.call('change', this, t, onInput);
+           };
+         }

 
 

-               input = input.enter()
-                   .append('input')
-                   .attr('type', 'text')
-                   .attr('class', 'maxspeed-number')
-                   .attr('id', field.domId)
-                   .call(utilNoAuto)
-                   .call(speedCombo)
-                   .merge(input);
+         textarea.tags = function (tags) {
+           _tags = tags;
+           var isMixed = Array.isArray(tags[field.key]);
+           utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);
+         };

 
 

-               input
-                   .on('change', change)
-                   .on('blur', change);
+         textarea.focus = function () {
+           input.node().focus();
+         };

 
 

-               var loc = combinedEntityExtent().center();
-               _isImperial = roadSpeedUnit(loc) === 'mph';
+         return utilRebind(textarea, dispatch, 'on');
+       }

 
 

-               unitInput = wrap.selectAll('input.maxspeed-unit')
-                   .data([0]);
+       var $ = _export;
+       var getOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+       var toLength = toLength$q;
+       var notARegExp = notARegexp;
+       var requireObjectCoercible = requireObjectCoercible$e;
+       var correctIsRegExpLogic = correctIsRegexpLogic;

 
 

-               unitInput = unitInput.enter()
-                   .append('input')
-                   .attr('type', 'text')
-                   .attr('class', 'maxspeed-unit')
-                   .call(unitCombo)
-                   .merge(unitInput);
+       // eslint-disable-next-line es/no-string-prototype-endswith -- safe
+       var $endsWith = ''.endsWith;
+       var min = Math.min;

 
 

-               unitInput
-                   .on('blur', changeUnits)
-                   .on('change', changeUnits);
+       var CORRECT_IS_REGEXP_LOGIC = correctIsRegExpLogic('endsWith');
+       // https://github.com/zloirock/core-js/pull/702
+       var MDN_POLYFILL_BUG = !CORRECT_IS_REGEXP_LOGIC && !!function () {
+         var descriptor = getOwnPropertyDescriptor(String.prototype, 'endsWith');
+         return descriptor && !descriptor.writable;
+       }();
+
+       // `String.prototype.endsWith` method
+       // https://tc39.es/ecma262/#sec-string.prototype.endswith
+       $({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {
+         endsWith: function endsWith(searchString /* , endPosition = @length */) {
+           var that = String(requireObjectCoercible(this));
+           notARegExp(searchString);
+           var endPosition = arguments.length > 1 ? arguments[1] : undefined;
+           var len = toLength(that.length);
+           var end = endPosition === undefined ? len : min(toLength(endPosition), len);
+           var search = String(searchString);
+           return $endsWith
+             ? $endsWith.call(that, search, end)
+             : that.slice(end - search.length, end) === search;
+         }
+       });

 
 

+       function uiFieldWikidata(field, context) {
+         var wikidata = services.wikidata;
+         var dispatch = dispatch$8('change');

 
 

-               function changeUnits() {
-                   _isImperial = utilGetSetValue(unitInput) === 'mph';
-                   utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-                   setUnitSuggestions();
-                   change();
-               }
-           }
+         var _selection = select(null);

 
 

+         var _searchInput = select(null);

 
 

-           function setUnitSuggestions() {
-               speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
-               utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-           }
+         var _qid = null;
+         var _wikidataEntity = null;
+         var _wikiURL = '';
+         var _entityIDs = [];

 
 

+         var _wikipediaKey = field.keys && field.keys.find(function (key) {
+           return key.includes('wikipedia');
+         }),
+             _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];

 
 

-           function comboValues(d) {
-               return {
-                   value: d.toString(),
-                   title: d.toString()
-               };
-           }
+         var combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(true).minItems(1);

 
 

+         function wiki(selection) {
+           _selection = selection;
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           var list = wrap.selectAll('ul').data([0]);
+           list = list.enter().append('ul').attr('class', 'rows').merge(list);
+           var searchRow = list.selectAll('li.wikidata-search').data([0]);
+           var searchRowEnter = searchRow.enter().append('li').attr('class', 'wikidata-search');
+           searchRowEnter.append('input').attr('type', 'text').attr('id', field.domId).style('flex', '1').call(utilNoAuto).on('focus', function () {
+             var node = select(this).node();
+             node.setSelectionRange(0, node.value.length);
+           }).on('blur', function () {
+             setLabelForEntity();
+           }).call(combobox.fetcher(fetchWikidataItems));
+           combobox.on('accept', function (d) {
+             if (d) {
+               _qid = d.id;
+               change();
+             }
+           }).on('cancel', function () {
+             setLabelForEntity();
+           });
+           searchRowEnter.append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
+             domain: 'wikidata.org'
+           })).call(svgIcon('#iD-icon-out-link')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             if (_wikiURL) window.open(_wikiURL, '_blank');
+           });
+           searchRow = searchRow.merge(searchRowEnter);
+           _searchInput = searchRow.select('input');
+           var wikidataProperties = ['description', 'identifier'];
+           var items = list.selectAll('li.labeled-input').data(wikidataProperties); // Enter

 
 

-           function change() {
-               var tag = {};
-               var value = utilGetSetValue(input).trim();
+           var enter = items.enter().append('li').attr('class', function (d) {
+             return 'labeled-input preset-wikidata-' + d;
+           });
+           enter.append('span').attr('class', 'label').html(function (d) {
+             return _t.html('wikidata.' + d);
+           });
+           enter.append('input').attr('type', 'text').call(utilNoAuto).classed('disabled', 'true').attr('readonly', 'true');
+           enter.append('button').attr('class', 'form-field-button').attr('title', _t('icons.copy')).call(svgIcon('#iD-operation-copy')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             select(this.parentNode).select('input').node().select();
+             document.execCommand('copy');
+           });
+         }

 
 

-               // don't override multiple values with blank string
-               if (!value && Array.isArray(_tags[field.key])) { return; }
+         function fetchWikidataItems(q, callback) {
+           if (!q && _hintKey) {
+             // other tags may be good search terms
+             for (var i in _entityIDs) {
+               var entity = context.hasEntity(_entityIDs[i]);

 
 

-               if (!value) {
-                   tag[field.key] = undefined;
-               } else if (isNaN(value) || !_isImperial) {
-                   tag[field.key] = context.cleanTagValue(value);
-               } else {
-                   tag[field.key] = context.cleanTagValue(value + ' mph');
+               if (entity.tags[_hintKey]) {
+                 q = entity.tags[_hintKey];
+                 break;

                }
                }

-
-               dispatch$1.call('change', this, tag);
+             }

            }
 
            }
 

+           wikidata.itemsForSearchQuery(q, function (err, data) {
+             if (err) return;
+
+             for (var i in data) {
+               data[i].value = data[i].label + ' (' + data[i].id + ')';
+               data[i].title = data[i].description;
+             }

 
 

-           maxspeed.tags = function(tags) {
-               _tags = tags;
+             if (callback) callback(data);
+           });
+         }

 
 

-               var value = tags[field.key];
-               var isMixed = Array.isArray(value);
+         function change() {
+           var syncTags = {};
+           syncTags[field.key] = _qid;
+           dispatch.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..

 
 

-               if (!isMixed) {
-                   if (value && value.indexOf('mph') >= 0) {
-                       value = parseInt(value, 10).toString();
-                       _isImperial = true;
-                   } else if (value) {
-                       _isImperial = false;
-                   }
+           var initGraph = context.graph();
+           var initEntityIDs = _entityIDs;
+           wikidata.entityByQID(_qid, function (err, entity) {
+             if (err) return; // If graph has changed, we can't apply this update.
+
+             if (context.graph() !== initGraph) return;
+             if (!entity.sitelinks) return;
+             var langs = wikidata.languagesToQuery(); // use the label and description languages as fallbacks
+
+             ['labels', 'descriptions'].forEach(function (key) {
+               if (!entity[key]) return;
+               var valueLangs = Object.keys(entity[key]);
+               if (valueLangs.length === 0) return;
+               var valueLang = valueLangs[0];
+
+               if (langs.indexOf(valueLang) === -1) {
+                 langs.push(valueLang);

                }
                }

+             });
+             var newWikipediaValue;

 
 

-               setUnitSuggestions();
+             if (_wikipediaKey) {
+               var foundPreferred;

 
 

-               utilGetSetValue(input, typeof value === 'string' ? value : '')
-                   .attr('title', isMixed ? value.filter(Boolean).join('\n') : null)
-                   .attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder())
-                   .classed('mixed', isMixed);
-           };
+               for (var i in langs) {
+                 var lang = langs[i];
+                 var siteID = lang.replace('-', '_') + 'wiki';

 
 

+                 if (entity.sitelinks[siteID]) {
+                   foundPreferred = true;
+                   newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match

 
 

-           maxspeed.focus = function() {
-               input.node().focus();
-           };
+                   break;
+                 }
+               }

 
 

+               if (!foundPreferred) {
+                 // No wikipedia sites available in the user's language or the fallback languages,
+                 // default to any wikipedia sitelink
+                 var wikiSiteKeys = Object.keys(entity.sitelinks).filter(function (site) {
+                   return site.endsWith('wiki');
+                 });

 
 

-           maxspeed.entityIDs = function(val) {
-               _entityIDs = val;
-           };
+                 if (wikiSiteKeys.length === 0) {
+                   // if no wikipedia pages are linked to this wikidata entity, delete that tag
+                   newWikipediaValue = null;
+                 } else {
+                   var wikiLang = wikiSiteKeys[0].slice(0, -4).replace('_', '-');
+                   var wikiTitle = entity.sitelinks[wikiSiteKeys[0]].title;
+                   newWikipediaValue = wikiLang + ':' + wikiTitle;
+                 }
+               }
+             }

 
 

+             if (newWikipediaValue) {
+               newWikipediaValue = context.cleanTagValue(newWikipediaValue);
+             }

 
 

-           function combinedEntityExtent() {
-               return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-           }
+             if (typeof newWikipediaValue === 'undefined') return;
+             var actions = initEntityIDs.map(function (entityID) {
+               var entity = context.hasEntity(entityID);
+               if (!entity) return null;
+               var currTags = Object.assign({}, entity.tags); // shallow copy

 
 

+               if (newWikipediaValue === null) {
+                 if (!currTags[_wikipediaKey]) return null;
+                 delete currTags[_wikipediaKey];
+               } else {
+                 currTags[_wikipediaKey] = newWikipediaValue;
+               }

 
 

-           return utilRebind(maxspeed, dispatch$1, 'on');
-       }
+               return actionChangeTags(entityID, currTags);
+             }).filter(Boolean);
+             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change

 
 

-       function uiFieldRadio(field, context) {
-           var dispatch$1 = dispatch('change');
-           var placeholder = select(null);
-           var wrap = select(null);
-           var labels = select(null);
-           var radios = select(null);
-           var radioData = (field.options || (field.strings && field.strings.options && Object.keys(field.strings.options)) || field.keys).slice();  // shallow copy
-           var typeField;
-           var layerField;
-           var _oldType = {};
-           var _entityIDs = [];
+             context.overwrite(function actionUpdateWikipediaTags(graph) {
+               actions.forEach(function (action) {
+                 graph = action(graph);
+               });
+               return graph;
+             }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
+             // changeTags() is not intended to be called asynchronously
+           });
+         }

 
 

+         function setLabelForEntity() {
+           var label = '';

 
 

-           function selectedKey() {
-               var node = wrap.selectAll('.form-field-input-radio label.active input');
-               return !node.empty() && node.datum();
+           if (_wikidataEntity) {
+             label = entityPropertyForDisplay(_wikidataEntity, 'labels');
+
+             if (label.length === 0) {
+               label = _wikidataEntity.id.toString();
+             }

            }
 
            }
 

+           utilGetSetValue(_searchInput, label);
+         }
+
+         wiki.tags = function (tags) {
+           var isMixed = Array.isArray(tags[field.key]);

 
 

-           function radio(selection) {
-               selection.classed('preset-radio', true);
+           _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);

 
 

-               wrap = selection.selectAll('.form-field-input-wrap')
-                   .data([0]);
+           _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';

 
 

-               var enter = wrap.enter()
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-radio');
+           if (!/^Q[0-9]*$/.test(_qid)) {
+             // not a proper QID
+             unrecognized();
+             return;
+           } // QID value in correct format

 
 

-               enter
-                   .append('span')
-                   .attr('class', 'placeholder');

 
 

-               wrap = wrap
-                   .merge(enter);
+           _wikiURL = 'https://wikidata.org/wiki/' + _qid;
+           wikidata.entityByQID(_qid, function (err, entity) {
+             if (err) {
+               unrecognized();
+               return;
+             }

 
 

+             _wikidataEntity = entity;
+             setLabelForEntity();
+             var description = entityPropertyForDisplay(entity, 'descriptions');

 
 

-               placeholder = wrap.selectAll('.placeholder');
+             _selection.select('button.wiki-link').classed('disabled', false);

 
 

-               labels = wrap.selectAll('label')
-                   .data(radioData);
+             _selection.select('.preset-wikidata-description').style('display', function () {
+               return description.length > 0 ? 'flex' : 'none';
+             }).select('input').attr('value', description);

 
 

-               enter = labels.enter()
-                   .append('label');
+             _selection.select('.preset-wikidata-identifier').style('display', function () {
+               return entity.id ? 'flex' : 'none';
+             }).select('input').attr('value', entity.id);
+           }); // not a proper QID

 
 

-               enter
-                   .append('input')
-                   .attr('type', 'radio')
-                   .attr('name', field.id)
-                   .attr('value', function(d) { return field.t('options.' + d, { 'default': d }); })
-                   .attr('checked', false);
+           function unrecognized() {
+             _wikidataEntity = null;
+             setLabelForEntity();

 
 

-               enter
-                   .append('span')
-                   .text(function(d) { return field.t('options.' + d, { 'default': d }); });
+             _selection.select('.preset-wikidata-description').style('display', 'none');

 
 

-               labels = labels
-                   .merge(enter);
+             _selection.select('.preset-wikidata-identifier').style('display', 'none');

 
 

-               radios = labels.selectAll('input')
-                   .on('change', changeRadio);
+             _selection.select('button.wiki-link').classed('disabled', true);

 
 

+             if (_qid && _qid !== '') {
+               _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
+             } else {
+               _wikiURL = '';
+             }

            }
            }

+         };

 
 

+         function entityPropertyForDisplay(wikidataEntity, propKey) {
+           if (!wikidataEntity[propKey]) return '';
+           var propObj = wikidataEntity[propKey];
+           var langKeys = Object.keys(propObj);
+           if (langKeys.length === 0) return ''; // sorted by priority, since we want to show the user's language first if possible

 
 

-           function structureExtras(selection, tags) {
-               var selected = selectedKey() || tags.layer !== undefined;
-               var type = _mainPresetIndex.field(selected);
-               var layer = _mainPresetIndex.field('layer');
-               var showLayer = (selected === 'bridge' || selected === 'tunnel' || tags.layer !== undefined);
+           var langs = wikidata.languagesToQuery();

 
 

+           for (var i in langs) {
+             var lang = langs[i];
+             var valueObj = propObj[lang];
+             if (valueObj && valueObj.value && valueObj.value.length > 0) return valueObj.value;
+           } // default to any available value

 
 

-               var extrasWrap = selection.selectAll('.structure-extras-wrap')
-                   .data(selected ? [0] : []);

 
 

-               extrasWrap.exit()
-                   .remove();
+           return propObj[langKeys[0]].value;
+         }

 
 

-               extrasWrap = extrasWrap.enter()
-                   .append('div')
-                   .attr('class', 'structure-extras-wrap')
-                   .merge(extrasWrap);
+         wiki.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return wiki;
+         };

 
 

-               var list = extrasWrap.selectAll('ul')
-                   .data([0]);
+         wiki.focus = function () {
+           _searchInput.node().focus();
+         };

 
 

-               list = list.enter()
-                   .append('ul')
-                   .attr('class', 'rows')
-                   .merge(list);
+         return utilRebind(wiki, dispatch, 'on');
+       }

 
 

+       function uiFieldWikipedia(field, context) {
+         var _arguments = arguments;
+         var dispatch = dispatch$8('change');
+         var wikipedia = services.wikipedia;
+         var wikidata = services.wikidata;

 
 

-               // Type
-               if (type) {
-                   if (!typeField || typeField.id !== selected) {
-                       typeField = uiField(context, type, _entityIDs, { wrap: false })
-                           .on('change', changeType);
-                   }
-                   typeField.tags(tags);
-               } else {
-                   typeField = null;
-               }
+         var _langInput = select(null);

 
 

-               var typeItem = list.selectAll('.structure-type-item')
-                   .data(typeField ? [typeField] : [], function(d) { return d.id; });
+         var _titleInput = select(null);

 
 

-               // Exit
-               typeItem.exit()
-                   .remove();
+         var _wikiURL = '';

 
 

-               // Enter
-               var typeEnter = typeItem.enter()
-                   .insert('li', ':first-child')
-                   .attr('class', 'labeled-input structure-type-item');
+         var _entityIDs;

 
 

-               typeEnter
-                   .append('span')
-                   .attr('class', 'label structure-label-type')
-                   .attr('for', 'preset-input-' + selected)
-                   .text(_t('inspector.radio.structure.type'));
+         var _tags;

 
 

-               typeEnter
-                   .append('div')
-                   .attr('class', 'structure-input-type-wrap');
+         var _dataWikipedia = [];
+         _mainFileFetcher.get('wmf_sitematrix').then(function (d) {
+           _dataWikipedia = d;
+           if (_tags) updateForTags(_tags);
+         })["catch"](function () {
+           /* ignore */
+         });
+         var langCombo = uiCombobox(context, 'wikipedia-lang').fetcher(function (value, callback) {
+           var v = value.toLowerCase();
+           callback(_dataWikipedia.filter(function (d) {
+             return d[0].toLowerCase().indexOf(v) >= 0 || d[1].toLowerCase().indexOf(v) >= 0 || d[2].toLowerCase().indexOf(v) >= 0;
+           }).map(function (d) {
+             return {
+               value: d[1]
+             };
+           }));
+         });
+         var titleCombo = uiCombobox(context, 'wikipedia-title').fetcher(function (value, callback) {
+           if (!value) {
+             value = '';

 
 

-               // Update
-               typeItem = typeItem
-                   .merge(typeEnter);
+             for (var i in _entityIDs) {
+               var entity = context.hasEntity(_entityIDs[i]);

 
 

-               if (typeField) {
-                   typeItem.selectAll('.structure-input-type-wrap')
-                       .call(typeField.render);
+               if (entity.tags.name) {
+                 value = entity.tags.name;
+                 break;

                }
                }

+             }
+           }
+
+           var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
+           searchfn(language()[2], value, function (query, data) {
+             callback(data.map(function (d) {
+               return {
+                 value: d
+               };
+             }));
+           });
+         });

 
 

+         function wiki(selection) {
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', "form-field-input-wrap form-field-input-".concat(field.type)).merge(wrap);
+           var langContainer = wrap.selectAll('.wiki-lang-container').data([0]);
+           langContainer = langContainer.enter().append('div').attr('class', 'wiki-lang-container').merge(langContainer);
+           _langInput = langContainer.selectAll('input.wiki-lang').data([0]);
+           _langInput = _langInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-lang').attr('placeholder', _t('translate.localized_translation_language')).call(utilNoAuto).call(langCombo).merge(_langInput);
+
+           _langInput.on('blur', changeLang).on('change', changeLang);
+
+           var titleContainer = wrap.selectAll('.wiki-title-container').data([0]);
+           titleContainer = titleContainer.enter().append('div').attr('class', 'wiki-title-container').merge(titleContainer);
+           _titleInput = titleContainer.selectAll('input.wiki-title').data([0]);
+           _titleInput = _titleInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-title').attr('id', field.domId).call(utilNoAuto).call(titleCombo).merge(_titleInput);
+
+           _titleInput.on('blur', function () {
+             change(true);
+           }).on('change', function () {
+             change(false);
+           });

 
 

-               // Layer
-               if (layer && showLayer) {
-                   if (!layerField) {
-                       layerField = uiField(context, layer, _entityIDs, { wrap: false })
-                           .on('change', changeLayer);
-                   }
-                   layerField.tags(tags);
-                   field.keys = utilArrayUnion(field.keys, ['layer']);
-               } else {
-                   layerField = null;
-                   field.keys = field.keys.filter(function(k) { return k !== 'layer'; });
-               }
+           var link = titleContainer.selectAll('.wiki-link').data([0]);
+           link = link.enter().append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
+             domain: 'wikipedia.org'
+           })).call(svgIcon('#iD-icon-out-link')).merge(link);
+           link.on('click', function (d3_event) {
+             d3_event.preventDefault();
+             if (_wikiURL) window.open(_wikiURL, '_blank');
+           });
+         }

 
 

-               var layerItem = list.selectAll('.structure-layer-item')
-                   .data(layerField ? [layerField] : []);
+         function defaultLanguageInfo(skipEnglishFallback) {
+           var langCode = _mainLocalizer.languageCode().toLowerCase();

 
 

-               // Exit
-               layerItem.exit()
-                   .remove();
+           for (var i in _dataWikipedia) {
+             var d = _dataWikipedia[i]; // default to the language of iD's current locale

 
 

-               // Enter
-               var layerEnter = layerItem.enter()
-                   .append('li')
-                   .attr('class', 'labeled-input structure-layer-item');
+             if (d[2] === langCode) return d;
+           } // fallback to English

 
 

-               layerEnter
-                   .append('span')
-                   .attr('class', 'label structure-label-layer')
-                   .attr('for', 'preset-input-layer')
-                   .text(_t('inspector.radio.structure.layer'));

 
 

-               layerEnter
-                   .append('div')
-                   .attr('class', 'structure-input-layer-wrap');
+           return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
+         }

 
 

-               // Update
-               layerItem = layerItem
-                   .merge(layerEnter);
+         function language(skipEnglishFallback) {
+           var value = utilGetSetValue(_langInput).toLowerCase();

 
 

-               if (layerField) {
-                   layerItem.selectAll('.structure-input-layer-wrap')
-                       .call(layerField.render);
-               }
-           }
+           for (var i in _dataWikipedia) {
+             var d = _dataWikipedia[i]; // return the language already set in the UI, if supported

 
 

+             if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
+           } // fallback to English

 
 

-           function changeType(t, onInput) {
-               var key = selectedKey();
-               if (!key) { return; }

 
 

-               var val = t[key];
-               if (val !== 'no') {
-                   _oldType[key] = val;
-               }
+           return defaultLanguageInfo(skipEnglishFallback);
+         }

 
 

-               if (field.type === 'structureRadio') {
-                   // remove layer if it should not be set
-                   if (val === 'no' ||
-                       (key !== 'bridge' && key !== 'tunnel') ||
-                       (key === 'tunnel' && val === 'building_passage')) {
-                       t.layer = undefined;
-                   }
-                   // add layer if it should be set
-                   if (t.layer === undefined) {
-                       if (key === 'bridge' && val !== 'no') {
-                           t.layer = '1';
-                       }
-                       if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
-                           t.layer = '-1';
-                       }
-                   }
-                }
+         function changeLang() {
+           utilGetSetValue(_langInput, language()[1]);
+           change(true);
+         }

 
 

-               dispatch$1.call('change', this, t, onInput);
-           }
+         function change(skipWikidata) {
+           var value = utilGetSetValue(_titleInput);
+           var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);

 
 

+           var langInfo = m && _dataWikipedia.find(function (d) {
+             return m[1] === d[2];
+           });

 
 

-           function changeLayer(t, onInput) {
-               if (t.layer === '0') {
-                   t.layer = undefined;
-               }
-               dispatch$1.call('change', this, t, onInput);
-           }
+           var syncTags = {};

 
 

+           if (langInfo) {
+             var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization

 
 

-           function changeRadio() {
-               var t = {};
-               var activeKey;
+             value = decodeURIComponent(m[2]).replace(/_/g, ' ');

 
 

-               if (field.key) {
-                   t[field.key] = undefined;
-               }
+             if (m[3]) {
+               var anchor; // try {
+               // leave this out for now - #6232
+               // Best-effort `anchordecode:` implementation
+               // anchor = decodeURIComponent(m[3].replace(/\.([0-9A-F]{2})/g, '%$1'));
+               // } catch (e) {

 
 

-               radios.each(function(d) {
-                   var active = select(this).property('checked');
-                   if (active) { activeKey = d; }
+               anchor = decodeURIComponent(m[3]); // }

 
 

-                   if (field.key) {
-                       if (active) { t[field.key] = d; }
-                   } else {
-                       var val = _oldType[activeKey] || 'yes';
-                       t[d] = active ? val : undefined;
-                   }
-               });
+               value += '#' + anchor.replace(/_/g, ' ');
+             }

 
 

-               if (field.type === 'structureRadio') {
-                   if (activeKey === 'bridge') {
-                       t.layer = '1';
-                   } else if (activeKey === 'tunnel' && t.tunnel !== 'building_passage') {
-                       t.layer = '-1';
-                   } else {
-                       t.layer = undefined;
-                   }
-               }
+             value = value.slice(0, 1).toUpperCase() + value.slice(1);
+             utilGetSetValue(_langInput, nativeLangName);
+             utilGetSetValue(_titleInput, value);
+           }

 
 

-               dispatch$1.call('change', this, t);
+           if (value) {
+             syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
+           } else {
+             syncTags.wikipedia = undefined;

            }
 
            }
 

+           dispatch.call('change', this, syncTags);
+           if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..

 
 

-           radio.tags = function(tags) {
+           var initGraph = context.graph();
+           var initEntityIDs = _entityIDs;
+           wikidata.itemsByTitle(language()[2], value, function (err, data) {
+             if (err || !data || !Object.keys(data).length) return; // If graph has changed, we can't apply this update.

 
 

-               radios.property('checked', function(d) {
-                   if (field.key) {
-                       return tags[field.key] === d;
-                   }
-                   return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
-               });
+             if (context.graph() !== initGraph) return;
+             var qids = Object.keys(data);
+             var value = qids && qids.find(function (id) {
+               return id.match(/^Q\d+$/);
+             });
+             var actions = initEntityIDs.map(function (entityID) {
+               var entity = context.entity(entityID).tags;
+               var currTags = Object.assign({}, entity); // shallow copy

 
 

-               function isMixed(d) {
-                   if (field.key) {
-                       return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
-                   }
-                   return Array.isArray(tags[d]);
+               if (currTags.wikidata !== value) {
+                 currTags.wikidata = value;
+                 return actionChangeTags(entityID, currTags);

                }
 
                }
 

-               labels
-                   .classed('active', function(d) {
-                       if (field.key) {
-                           return (Array.isArray(tags[field.key]) && tags[field.key].includes(d))
-                               || tags[field.key] === d;
-                       }
-                       return Array.isArray(tags[d]) || !!(tags[d] && tags[d].toLowerCase() !== 'no');
-                   })
-                   .classed('mixed', isMixed)
-                   .attr('title', function(d) {
-                       return isMixed(d) ? _t('inspector.unshared_value_tooltip') : null;
-                   });
+               return null;
+             }).filter(Boolean);
+             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change

 
 

+             context.overwrite(function actionUpdateWikidataTags(graph) {
+               actions.forEach(function (action) {
+                 graph = action(graph);
+               });
+               return graph;
+             }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
+             // changeTags() is not intended to be called asynchronously
+           });
+         }

 
 

-               var selection = radios.filter(function() { return this.checked; });
+         wiki.tags = function (tags) {
+           _tags = tags;
+           updateForTags(tags);
+         };

 
 

-               if (selection.empty()) {
-                   placeholder.text(_t('inspector.none'));
-               } else {
-                   placeholder.text(selection.attr('value'));
-                   _oldType[selection.datum()] = tags[selection.datum()];
-               }
+         function updateForTags(tags) {
+           var value = typeof tags[field.key] === 'string' ? tags[field.key] : ''; // Expect tag format of `tagLang:tagArticleTitle`, e.g. `fr:Paris`, with
+           // optional suffix of `#anchor`

 
 

-               if (field.type === 'structureRadio') {
-                   // For waterways without a tunnel tag, set 'culvert' as
-                   // the _oldType to default to if the user picks 'tunnel'
-                   if (!!tags.waterway && !_oldType.tunnel) {
-                       _oldType.tunnel = 'culvert';
-                   }
+           var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
+           var tagLang = m && m[1];
+           var tagArticleTitle = m && m[2];
+           var anchor = m && m[3];

 
 

-                   wrap.call(structureExtras, tags);
-               }
-           };
+           var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
+             return tagLang === d[2];
+           }); // value in correct format

 
 
 
 

-           radio.focus = function() {
-               radios.node().focus();
-           };
+           if (tagLangInfo) {
+             var nativeLangName = tagLangInfo[1];
+             utilGetSetValue(_langInput, nativeLangName);
+             utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));

 
 

+             if (anchor) {
+               try {
+                 // Best-effort `anchorencode:` implementation
+                 anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
+               } catch (e) {
+                 anchor = anchor.replace(/ /g, '_');
+               }
+             }

 
 

-           radio.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               _entityIDs = val;
-               _oldType = {};
-               return radio;
-           };
+             _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
+           } else {
+             utilGetSetValue(_titleInput, value);

 
 

+             if (value && value !== '') {
+               utilGetSetValue(_langInput, '');
+               var defaultLangInfo = defaultLanguageInfo();
+               _wikiURL = "https://".concat(defaultLangInfo[2], ".wikipedia.org/w/index.php?fulltext=1&search=").concat(value);
+             } else {
+               var shownOrDefaultLangInfo = language(true
+               /* skipEnglishFallback */
+               );
+               utilGetSetValue(_langInput, shownOrDefaultLangInfo[1]);
+               _wikiURL = '';
+             }
+           }
+         }

 
 

-           radio.isAllowed = function() {
-               return _entityIDs.length === 1;
-           };
+         wiki.entityIDs = function (val) {
+           if (!_arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return wiki;
+         };

 
 

+         wiki.focus = function () {
+           _titleInput.node().focus();
+         };

 
 

-           return utilRebind(radio, dispatch$1, 'on');
+         return utilRebind(wiki, dispatch, 'on');

        }
        }

+       uiFieldWikipedia.supportsMultiselection = false;

 
 

-       function uiFieldRestrictions(field, context) {
-           var dispatch$1 = dispatch('change');
-           var breathe = behaviorBreathe();
-
-           corePreferences('turn-restriction-via-way', null);                 // remove old key
-           var storedViaWay = corePreferences('turn-restriction-via-way0');   // use new key #6922
-           var storedDistance = corePreferences('turn-restriction-distance');
-
-           var _maxViaWay = storedViaWay !== null ? (+storedViaWay) : 0;
-           var _maxDistance = storedDistance ? (+storedDistance) : 30;
-           var _initialized = false;
-           var _parent = select(null);       // the entire field
-           var _container = select(null);    // just the map
-           var _oldTurns;
-           var _graph;
-           var _vertexID;
-           var _intersection;
-           var _fromWayID;
-
-           var _lastXPos;
-
-
-           function restrictions(selection) {
-               _parent = selection;
-
-               // try to reuse the intersection, but always rebuild it if the graph has changed
-               if (_vertexID && (context.graph() !== _graph || !_intersection)) {
-                   _graph = context.graph();
-                   _intersection = osmIntersection(_graph, _vertexID, _maxDistance);
-               }
-
-               // It's possible for there to be no actual intersection here.
-               // for example, a vertex of two `highway=path`
-               // In this case, hide the field.
-               var isOK = (
-                   _intersection &&
-                   _intersection.vertices.length &&           // has vertices
-                   _intersection.vertices                     // has the vertex that the user selected
-                       .filter(function(vertex) { return vertex.id === _vertexID; }).length &&
-                   _intersection.ways.length > 2 &&           // has more than 2 ways
-                   _intersection.ways                         // has more than 1 TO way
-                       .filter(function(way) { return way.__to; }).length > 1
-               );
+       var uiFields = {
+         access: uiFieldAccess,
+         address: uiFieldAddress,
+         check: uiFieldCheck,
+         combo: uiFieldCombo,
+         cycleway: uiFieldCycleway,
+         defaultCheck: uiFieldCheck,
+         email: uiFieldText,
+         identifier: uiFieldText,
+         lanes: uiFieldLanes,
+         localized: uiFieldLocalized,
+         roadheight: uiFieldRoadheight,
+         roadspeed: uiFieldRoadspeed,
+         manyCombo: uiFieldCombo,
+         multiCombo: uiFieldCombo,
+         networkCombo: uiFieldCombo,
+         number: uiFieldText,
+         onewayCheck: uiFieldCheck,
+         radio: uiFieldRadio,
+         restrictions: uiFieldRestrictions,
+         semiCombo: uiFieldCombo,
+         structureRadio: uiFieldRadio,
+         tel: uiFieldText,
+         text: uiFieldText,
+         textarea: uiFieldTextarea,
+         typeCombo: uiFieldCombo,
+         url: uiFieldText,
+         wikidata: uiFieldWikidata,
+         wikipedia: uiFieldWikipedia
+       };

 
 

-               // Also hide in the case where
-               select(selection.node().parentNode).classed('hide', !isOK);
+       function uiField(context, presetField, entityIDs, options) {
+         options = Object.assign({
+           show: true,
+           wrap: true,
+           remove: true,
+           revert: true,
+           info: true
+         }, options);
+         var dispatch = dispatch$8('change', 'revert');
+         var field = Object.assign({}, presetField); // shallow copy

 
 

-               // if form field is hidden or has detached from dom, clean up.
-               if (!isOK ||
-                   !context.container().select('.inspector-wrap.inspector-hidden').empty() ||
-                   !selection.node().parentNode ||
-                   !selection.node().parentNode.parentNode) {
-                   selection.call(restrictions.off);
-                   return;
-               }
+         field.domId = utilUniqueDomId('form-field-' + field.safeid);
+         var _show = options.show;
+         var _state = '';
+         var _tags = {};

 
 

+         var _entityExtent;

 
 

-               var wrap = selection.selectAll('.form-field-input-wrap')
-                   .data([0]);
+         if (entityIDs && entityIDs.length) {
+           _entityExtent = entityIDs.reduce(function (extent, entityID) {
+             var entity = context.graph().entity(entityID);
+             return extent.extend(entity.extent(context.graph()));
+           }, geoExtent());
+         }

 
 

-               wrap = wrap.enter()
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-                   .merge(wrap);
+         var _locked = false;

 
 

-               var container = wrap.selectAll('.restriction-container')
-                   .data([0]);
+         var _lockedTip = uiTooltip().title(_t.html('inspector.lock.suggestion', {
+           label: field.label
+         })).placement('bottom');

 
 

-               // enter
-               var containerEnter = container.enter()
-                   .append('div')
-                   .attr('class', 'restriction-container');
+         field.keys = field.keys || [field.key]; // only create the fields that are actually being shown

 
 

-               containerEnter
-                   .append('div')
-                   .attr('class', 'restriction-help');
+         if (_show && !field.impl) {
+           createField();
+         } // Creates the field.. This is done lazily,
+         // once we know that the field will be shown.

 
 

-               // update
-               _container = containerEnter
-                   .merge(container)
-                   .call(renderViewer);

 
 

-               var controls = wrap.selectAll('.restriction-controls')
-                   .data([0]);
+         function createField() {
+           field.impl = uiFields[field.type](field, context).on('change', function (t, onInput) {
+             dispatch.call('change', field, t, onInput);
+           });

 
 

-               // enter/update
-               controls.enter()
-                   .append('div')
-                   .attr('class', 'restriction-controls-container')
-                   .append('div')
-                   .attr('class', 'restriction-controls')
-                   .merge(controls)
-                   .call(renderControls);
-           }
+           if (entityIDs) {
+             field.entityIDs = entityIDs; // if this field cares about the entities, pass them along

 
 

+             if (field.impl.entityIDs) {
+               field.impl.entityIDs(entityIDs);
+             }
+           }
+         }

 
 

-           function renderControls(selection) {
-               var distControl = selection.selectAll('.restriction-distance')
-                   .data([0]);
+         function isModified() {
+           if (!entityIDs || !entityIDs.length) return false;
+           return entityIDs.some(function (entityID) {
+             var original = context.graph().base().entities[entityID];
+             var latest = context.graph().entity(entityID);
+             return field.keys.some(function (key) {
+               return original ? latest.tags[key] !== original.tags[key] : latest.tags[key];
+             });
+           });
+         }

 
 

-               distControl.exit()
-                   .remove();
+         function tagsContainFieldKey() {
+           return field.keys.some(function (key) {
+             if (field.type === 'multiCombo') {
+               for (var tagKey in _tags) {
+                 if (tagKey.indexOf(key) === 0) {
+                   return true;
+                 }
+               }

 
 

-               var distControlEnter = distControl.enter()
-                   .append('div')
-                   .attr('class', 'restriction-control restriction-distance');
-
-               distControlEnter
-                   .append('span')
-                   .attr('class', 'restriction-control-label restriction-distance-label')
-                   .text(_t('restriction.controls.distance') + ':');
-
-               distControlEnter
-                   .append('input')
-                   .attr('class', 'restriction-distance-input')
-                   .attr('type', 'range')
-                   .attr('min', '20')
-                   .attr('max', '50')
-                   .attr('step', '5');
-
-               distControlEnter
-                   .append('span')
-                   .attr('class', 'restriction-distance-text');
-
-               // update
-               selection.selectAll('.restriction-distance-input')
-                   .property('value', _maxDistance)
-                   .on('input', function() {
-                       var val = select(this).property('value');
-                       _maxDistance = +val;
-                       _intersection = null;
-                       _container.selectAll('.layer-osm .layer-turns *').remove();
-                       corePreferences('turn-restriction-distance', _maxDistance);
-                       _parent.call(restrictions);
-                   });
+               return false;
+             }

 
 

-               selection.selectAll('.restriction-distance-text')
-                   .text(displayMaxDistance(_maxDistance));
+             return _tags[key] !== undefined;
+           });
+         }

 
 

+         function revert(d3_event, d) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+           if (!entityIDs || _locked) return;
+           dispatch.call('revert', d, d.keys);
+         }

 
 

-               var viaControl = selection.selectAll('.restriction-via-way')
-                   .data([0]);
+         function remove(d3_event, d) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+           if (_locked) return;
+           var t = {};
+           d.keys.forEach(function (key) {
+             t[key] = undefined;
+           });
+           dispatch.call('change', d, t);
+         }

 
 

-               viaControl.exit()
-                   .remove();
+         field.render = function (selection) {
+           var container = selection.selectAll('.form-field').data([field]); // Enter

 
 

-               var viaControlEnter = viaControl.enter()
-                   .append('div')
-                   .attr('class', 'restriction-control restriction-via-way');
-
-               viaControlEnter
-                   .append('span')
-                   .attr('class', 'restriction-control-label restriction-via-way-label')
-                   .text(_t('restriction.controls.via') + ':');
-
-               viaControlEnter
-                   .append('input')
-                   .attr('class', 'restriction-via-way-input')
-                   .attr('type', 'range')
-                   .attr('min', '0')
-                   .attr('max', '2')
-                   .attr('step', '1');
-
-               viaControlEnter
-                   .append('span')
-                   .attr('class', 'restriction-via-way-text');
-
-               // update
-               selection.selectAll('.restriction-via-way-input')
-                   .property('value', _maxViaWay)
-                   .on('input', function() {
-                       var val = select(this).property('value');
-                       _maxViaWay = +val;
-                       _container.selectAll('.layer-osm .layer-turns *').remove();
-                       corePreferences('turn-restriction-via-way0', _maxViaWay);
-                       _parent.call(restrictions);
-                   });
+           var enter = container.enter().append('div').attr('class', function (d) {
+             return 'form-field form-field-' + d.safeid;
+           }).classed('nowrap', !options.wrap);

 
 

-               selection.selectAll('.restriction-via-way-text')
-                   .text(displayMaxVia(_maxViaWay));
-           }
+           if (options.wrap) {
+             var labelEnter = enter.append('label').attr('class', 'field-label').attr('for', function (d) {
+               return d.domId;
+             });
+             var textEnter = labelEnter.append('span').attr('class', 'label-text');
+             textEnter.append('span').attr('class', 'label-textvalue').html(function (d) {
+               return d.label();
+             });
+             textEnter.append('span').attr('class', 'label-textannotation');

 
 

+             if (options.remove) {
+               labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
+             }

 
 

-           function renderViewer(selection) {
-               if (!_intersection) { return; }
+             if (options.revert) {
+               labelEnter.append('button').attr('class', 'modified-icon').attr('title', _t('icons.undo')).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo'));
+             }
+           } // Update

 
 

-               var vgraph = _intersection.graph;
-               var filter = utilFunctor(true);
-               var projection = geoRawMercator();

 
 

-               // Reflow warning: `utilGetDimensions` calls `getBoundingClientRect`
-               // Instead of asking the restriction-container for its dimensions,
-               //  we can ask the .sidebar, which can have its dimensions cached.
-               // width: calc as sidebar - padding
-               // height: hardcoded (from `80_app.css`)
-               // var d = utilGetDimensions(selection);
-               var sdims = utilGetDimensions(context.container().select('.sidebar'));
-               var d = [ sdims[0] - 50, 370 ];
-               var c = geoVecScale(d, 0.5);
-               var z = 22;
+           container = container.merge(enter);
+           container.select('.field-label > .remove-icon') // propagate bound data
+           .on('click', remove);
+           container.select('.field-label > .modified-icon') // propagate bound data
+           .on('click', revert);
+           container.each(function (d) {
+             var selection = select(this);

 
 

-               projection.scale(geoZoomToScale(z));
+             if (!d.impl) {
+               createField();
+             }

 
 

-               // Calculate extent of all key vertices
-               var extent = geoExtent();
-               for (var i = 0; i < _intersection.vertices.length; i++) {
-                   extent._extend(_intersection.vertices[i].extent());
-               }
+             var reference, help; // instantiate field help

 
 

-               // If this is a large intersection, adjust zoom to fit extent
-               if (_intersection.vertices.length > 1) {
-                   var padding = 180;   // in z22 pixels
-                   var tl = projection([extent[0][0], extent[1][1]]);
-                   var br = projection([extent[1][0], extent[0][1]]);
-                   var hFactor = (br[0] - tl[0]) / (d[0] - padding);
-                   var vFactor = (br[1] - tl[1]) / (d[1] - padding);
-                   var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
-                   var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
-                   z = z - Math.max(hZoomDiff, vZoomDiff);
-                   projection.scale(geoZoomToScale(z));
-               }
+             if (options.wrap && field.type === 'restrictions') {
+               help = uiFieldHelp(context, 'restrictions');
+             } // instantiate tag reference

 
 

-               var padTop = 35;   // reserve top space for hint text
-               var extentCenter = projection(extent.center());
-               extentCenter[1] = extentCenter[1] - padTop;

 
 

-               projection
-                   .translate(geoVecSubtract(c, extentCenter))
-                   .clipExtent([[0, 0], d]);
+             if (options.wrap && options.info) {
+               var referenceKey = d.key || '';

 
 

-               var drawLayers = svgLayers(projection, context).only(['osm','touch']).dimensions(d);
-               var drawVertices = svgVertices(projection, context);
-               var drawLines = svgLines(projection, context);
-               var drawTurns = svgTurns(projection, context);
+               if (d.type === 'multiCombo') {
+                 // lookup key without the trailing ':'
+                 referenceKey = referenceKey.replace(/:$/, '');
+               }

 
 

-               var firstTime = selection.selectAll('.surface').empty();
+               reference = uiTagReference(d.reference || {
+                 key: referenceKey
+               });

 
 

-               selection
-                   .call(drawLayers);
+               if (_state === 'hover') {
+                 reference.showing(false);
+               }
+             }

 
 

-               var surface = selection.selectAll('.surface')
-                   .classed('tr', true);
+             selection.call(d.impl); // add field help components

 
 

-               if (firstTime) {
-                   _initialized = true;
+             if (help) {
+               selection.call(help.body).select('.field-label').call(help.button);
+             } // add tag reference components

 
 

-                   surface
-                       .call(breathe);
-               }

 
 

-               // This can happen if we've lowered the detail while a FROM way
-               // is selected, and that way is no longer part of the intersection.
-               if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
-                   _fromWayID = null;
-                   _oldTurns = null;
-               }
+             if (reference) {
+               selection.call(reference.body).select('.field-label').call(reference.button);
+             }

 
 

-               surface
-                   .call(utilSetDimensions, d)
-                   .call(drawVertices, vgraph, _intersection.vertices, filter, extent, z)
-                   .call(drawLines, vgraph, _intersection.ways, filter)
-                   .call(drawTurns, vgraph, _intersection.turns(_fromWayID, _maxViaWay));
+             d.impl.tags(_tags);
+           });
+           container.classed('locked', _locked).classed('modified', isModified()).classed('present', tagsContainFieldKey()); // show a tip and lock icon if the field is locked

 
 

-               surface
-                   .on('click.restrictions', click)
-                   .on('mouseover.restrictions', mouseover);
+           var annotation = container.selectAll('.field-label .label-textannotation');
+           var icon = annotation.selectAll('.icon').data(_locked ? [0] : []);
+           icon.exit().remove();
+           icon.enter().append('svg').attr('class', 'icon').append('use').attr('xlink:href', '#fas-lock');
+           container.call(_locked ? _lockedTip : _lockedTip.destroy);
+         };

 
 

-               surface
-                   .selectAll('.selected')
-                   .classed('selected', false);
+         field.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return field;
+         };

 
 

-               surface
-                   .selectAll('.related')
-                   .classed('related', false);
+         field.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val;

 
 

-               if (_fromWayID) {
-                   var way = vgraph.entity(_fromWayID);
-                   surface
-                       .selectAll('.' + _fromWayID)
-                       .classed('selected', true)
-                       .classed('related', true);
-               }
+           if (tagsContainFieldKey() && !_show) {
+             // always show a field if it has a value to display
+             _show = true;

 
 

-               document.addEventListener('resizeWindow', function () {
-                   utilSetDimensions(_container, null);
-                   redraw(1);
-               }, false);
+             if (!field.impl) {
+               createField();
+             }
+           }

 
 

-               updateHints(null);
+           return field;
+         };

 
 

+         field.locked = function (val) {
+           if (!arguments.length) return _locked;
+           _locked = val;
+           return field;
+         };

 
 

-               function click() {
-                   surface
-                       .call(breathe.off)
-                       .call(breathe);
+         field.show = function () {
+           _show = true;

 
 

-                   var datum = event.target.__data__;
-                   var entity = datum && datum.properties && datum.properties.entity;
-                   if (entity) {
-                       datum = entity;
-                   }
+           if (!field.impl) {
+             createField();
+           }

 
 

-                   if (datum instanceof osmWay && (datum.__from || datum.__via)) {
-                       _fromWayID = datum.id;
-                       _oldTurns = null;
-                       redraw();
-
-                   } else if (datum instanceof osmTurn) {
-                       var actions, extraActions, turns, i;
-                       var restrictionType = osmInferRestriction(vgraph, datum, projection);
-
-                       if (datum.restrictionID && !datum.direct) {
-                           return;
-
-                       } else if (datum.restrictionID && !datum.only) {    // NO -> ONLY
-                           var seen = {};
-                           var datumOnly = JSON.parse(JSON.stringify(datum));   // deep clone the datum
-                           datumOnly.only = true;                               // but change this property
-                           restrictionType = restrictionType.replace(/^no/, 'only');
-
-                           // Adding an ONLY restriction should destroy all other direct restrictions from the FROM towards the VIA.
-                           // We will remember them in _oldTurns, and restore them if the user clicks again.
-                           turns = _intersection.turns(_fromWayID, 2);
-                           extraActions = [];
-                           _oldTurns = [];
-                           for (i = 0; i < turns.length; i++) {
-                               var turn = turns[i];
-                               if (seen[turn.restrictionID]) { continue; }  // avoid deleting the turn twice (#4968, #4928)
-
-                               if (turn.direct && turn.path[1] === datum.path[1]) {
-                                   seen[turns[i].restrictionID] = true;
-                                   turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
-                                   _oldTurns.push(turn);
-                                   extraActions.push(actionUnrestrictTurn(turn));
-                               }
-                           }
+           if (field["default"] && field.key && _tags[field.key] !== field["default"]) {
+             var t = {};
+             t[field.key] = field["default"];
+             dispatch.call('change', this, t);
+           }
+         }; // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown

 
 

-                           actions = _intersection.actions.concat(extraActions, [
-                               actionRestrictTurn(datumOnly, restrictionType),
-                               _t('operations.restriction.annotation.create')
-                           ]);
-
-                       } else if (datum.restrictionID) {   // ONLY -> Allowed
-                           // Restore whatever restrictions we might have destroyed by cycling thru the ONLY state.
-                           // This relies on the assumption that the intersection was already split up when we
-                           // performed the previous action (NO -> ONLY), so the IDs in _oldTurns shouldn't have changed.
-                           turns = _oldTurns || [];
-                           extraActions = [];
-                           for (i = 0; i < turns.length; i++) {
-                               if (turns[i].key !== datum.key) {
-                                   extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
-                               }
-                           }
-                           _oldTurns = null;
-
-                           actions = _intersection.actions.concat(extraActions, [
-                               actionUnrestrictTurn(datum),
-                               _t('operations.restriction.annotation.delete')
-                           ]);
-
-                       } else {    // Allowed -> NO
-                           actions = _intersection.actions.concat([
-                               actionRestrictTurn(datum, restrictionType),
-                               _t('operations.restriction.annotation.create')
-                           ]);
-                       }

 
 

-                       context.perform.apply(context, actions);
+         field.isShown = function () {
+           return _show;
+         }; // An allowed field can appear in the UI or in the 'Add field' dropdown.
+         // A non-allowed field is hidden from the user altogether

 
 

-                       // At this point the datum will be changed, but will have same key..
-                       // Refresh it and update the help..
-                       var s = surface.selectAll('.' + datum.key);
-                       datum = s.empty() ? null : s.datum();
-                       updateHints(datum);

 
 

-                   } else {
-                       _fromWayID = null;
-                       _oldTurns = null;
-                       redraw();
-                   }
-               }
+         field.isAllowed = function () {
+           if (entityIDs && entityIDs.length > 1 && uiFields[field.type].supportsMultiselection === false) return false;
+           if (field.geometry && !entityIDs.every(function (entityID) {
+             return field.matchGeometry(context.graph().geometry(entityID));
+           })) return false;

 
 

+           if (entityIDs && _entityExtent && field.locationSetID) {
+             // is field allowed in this location?
+             var validLocations = _mainLocations.locationsAt(_entityExtent.center());
+             if (!validLocations[field.locationSetID]) return false;
+           }

 
 

-               function mouseover() {
-                   var datum = event.target.__data__;
-                   updateHints(datum);
-               }
+           var prerequisiteTag = field.prerequisiteTag;

 
 

-               _lastXPos = _lastXPos || sdims[0];
+           if (entityIDs && !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
+           prerequisiteTag) {
+             if (!entityIDs.every(function (entityID) {
+               var entity = context.graph().entity(entityID);

 
 

-               function redraw(minChange) {
-                   var xPos = -1;
+               if (prerequisiteTag.key) {
+                 var value = entity.tags[prerequisiteTag.key];
+                 if (!value) return false;

 
 

-                   if (minChange) {
-                       xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
-                   }
+                 if (prerequisiteTag.valueNot) {
+                   return prerequisiteTag.valueNot !== value;
+                 }

 
 

-                   if (!minChange || (minChange && Math.abs(xPos - _lastXPos) >= minChange)) {
-                       if (context.hasEntity(_vertexID)) {
-                           _lastXPos = xPos;
-                           _container.call(renderViewer);
-                       }
-                   }
+                 if (prerequisiteTag.value) {
+                   return prerequisiteTag.value === value;
+                 }
+               } else if (prerequisiteTag.keyNot) {
+                 if (entity.tags[prerequisiteTag.keyNot]) return false;

                }
 
                }
 

+               return true;
+             })) return false;
+           }

 
 

-               function highlightPathsFrom(wayID) {
-                   surface.selectAll('.related')
-                       .classed('related', false)
-                       .classed('allow', false)
-                       .classed('restrict', false)
-                       .classed('only', false);
-
-                   surface.selectAll('.' + wayID)
-                       .classed('related', true);
+           return true;
+         };

 
 

-                   if (wayID) {
-                       var turns = _intersection.turns(wayID, _maxViaWay);
-                       for (var i = 0; i < turns.length; i++) {
-                           var turn = turns[i];
-                           var ids = [turn.to.way];
-                           var klass = (turn.no ? 'restrict' : (turn.only ? 'only' : 'allow'));
+         field.focus = function () {
+           if (field.impl) {
+             field.impl.focus();
+           }
+         };

 
 

-                           if (turn.only || turns.length === 1) {
-                               if (turn.via.ways) {
-                                   ids = ids.concat(turn.via.ways);
-                               }
-                           } else if (turn.to.way === wayID) {
-                               continue;
-                           }
+         return utilRebind(field, dispatch, 'on');
+       }

 
 

-                           surface.selectAll(utilEntitySelector(ids))
-                               .classed('related', true)
-                               .classed('allow', (klass === 'allow'))
-                               .classed('restrict', (klass === 'restrict'))
-                               .classed('only', (klass === 'only'));
-                       }
-                   }
-               }
+       function uiFormFields(context) {
+         var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
+         var _fieldsArr = [];
+         var _lastPlaceholder = '';
+         var _state = '';
+         var _klass = '';
+
+         function formFields(selection) {
+           var allowedFields = _fieldsArr.filter(function (field) {
+             return field.isAllowed();
+           });

 
 

+           var shown = allowedFields.filter(function (field) {
+             return field.isShown();
+           });
+           var notShown = allowedFields.filter(function (field) {
+             return !field.isShown();
+           });
+           var container = selection.selectAll('.form-fields-container').data([0]);
+           container = container.enter().append('div').attr('class', 'form-fields-container ' + (_klass || '')).merge(container);
+           var fields = container.selectAll('.wrap-form-field').data(shown, function (d) {
+             return d.id + (d.entityIDs ? d.entityIDs.join() : '');
+           });
+           fields.exit().remove(); // Enter

 
 

-               function updateHints(datum) {
-                   var help = _container.selectAll('.restriction-help').html('');
+           var enter = fields.enter().append('div').attr('class', function (d) {
+             return 'wrap-form-field wrap-form-field-' + d.safeid;
+           }); // Update

 
 

-                   var placeholders = {};
-                   ['from', 'via', 'to'].forEach(function(k) {
-                       placeholders[k] = '<span class="qualifier">' + _t('restriction.help.' + k) + '</span>';
-                   });
+           fields = fields.merge(enter);
+           fields.order().each(function (d) {
+             select(this).call(d.render);
+           });
+           var titles = [];
+           var moreFields = notShown.map(function (field) {
+             var title = field.title();
+             titles.push(title);
+             var terms = field.terms();
+             if (field.key) terms.push(field.key);
+             if (field.keys) terms = terms.concat(field.keys);
+             return {
+               display: field.label(),
+               value: title,
+               title: title,
+               field: field,
+               terms: terms
+             };
+           });
+           var placeholder = titles.slice(0, 3).join(', ') + (titles.length > 3 ? '…' : '');
+           var more = selection.selectAll('.more-fields').data(_state === 'hover' || moreFields.length === 0 ? [] : [0]);
+           more.exit().remove();
+           var moreEnter = more.enter().append('div').attr('class', 'more-fields').append('label');
+           moreEnter.append('span').html(_t.html('inspector.add_fields'));
+           more = moreEnter.merge(more);
+           var input = more.selectAll('.value').data([0]);
+           input.exit().remove();
+           input = input.enter().append('input').attr('class', 'value').attr('type', 'text').attr('placeholder', placeholder).call(utilNoAuto).merge(input);
+           input.call(utilGetSetValue, '').call(moreCombo.data(moreFields).on('accept', function (d) {
+             if (!d) return; // user entered something that was not matched
+
+             var field = d.field;
+             field.show();
+             selection.call(formFields); // rerender
+
+             field.focus();
+           })); // avoid updating placeholder excessively (triggers style recalc)
+
+           if (_lastPlaceholder !== placeholder) {
+             input.attr('placeholder', placeholder);
+             _lastPlaceholder = placeholder;
+           }
+         }
+
+         formFields.fieldsArr = function (val) {
+           if (!arguments.length) return _fieldsArr;
+           _fieldsArr = val || [];
+           return formFields;
+         };

 
 

-                   var entity = datum && datum.properties && datum.properties.entity;
-                   if (entity) {
-                       datum = entity;
-                   }
+         formFields.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return formFields;
+         };

 
 

-                   if (_fromWayID) {
-                       way = vgraph.entity(_fromWayID);
-                       surface
-                           .selectAll('.' + _fromWayID)
-                           .classed('selected', true)
-                           .classed('related', true);
-                   }
+         formFields.klass = function (val) {
+           if (!arguments.length) return _klass;
+           _klass = val;
+           return formFields;
+         };

 
 

-                   // Hovering a way
-                   if (datum instanceof osmWay && datum.__from) {
-                       way = datum;
-
-                       highlightPathsFrom(_fromWayID ? null : way.id);
-                       surface.selectAll('.' + way.id)
-                           .classed('related', true);
-
-                       var clickSelect = (!_fromWayID || _fromWayID !== way.id);
-                       help
-                           .append('div')      // "Click to select FROM {fromName}." / "FROM {fromName}"
-                           .html(_t('restriction.help.' + (clickSelect ? 'select_from_name' : 'from_name'), {
-                               from: placeholders.from,
-                               fromName: displayName(way.id, vgraph)
-                           }));
-
-
-                   // Hovering a turn arrow
-                   } else if (datum instanceof osmTurn) {
-                       var restrictionType = osmInferRestriction(vgraph, datum, projection);
-                       var turnType = restrictionType.replace(/^(only|no)\_/, '');
-                       var indirect = (datum.direct === false ? _t('restriction.help.indirect') : '');
-                       var klass, turnText, nextText;
-
-                       if (datum.no) {
-                           klass = 'restrict';
-                           turnText = _t('restriction.help.turn.no_' + turnType, { indirect: indirect });
-                           nextText = _t('restriction.help.turn.only_' + turnType, { indirect: '' });
-                       } else if (datum.only) {
-                           klass = 'only';
-                           turnText = _t('restriction.help.turn.only_' + turnType, { indirect: indirect });
-                           nextText = _t('restriction.help.turn.allowed_' + turnType, { indirect: '' });
-                       } else {
-                           klass = 'allow';
-                           turnText = _t('restriction.help.turn.allowed_' + turnType, { indirect: indirect });
-                           nextText = _t('restriction.help.turn.no_' + turnType, { indirect: '' });
-                       }
+         return formFields;
+       }

 
 

-                       help
-                           .append('div')      // "NO Right Turn (indirect)"
-                           .attr('class', 'qualifier ' + klass)
-                           .text(turnText);
-
-                       help
-                           .append('div')      // "FROM {fromName} TO {toName}"
-                           .html(_t('restriction.help.from_name_to_name', {
-                               from: placeholders.from,
-                               fromName: displayName(datum.from.way, vgraph),
-                               to: placeholders.to,
-                               toName: displayName(datum.to.way, vgraph)
-                           }));
-
-                       if (datum.via.ways && datum.via.ways.length) {
-                           var names = [];
-                           for (var i = 0; i < datum.via.ways.length; i++) {
-                               var prev = names[names.length - 1];
-                               var curr = displayName(datum.via.ways[i], vgraph);
-                               if (!prev || curr !== prev)   // collapse identical names
-                                   { names.push(curr); }
-                           }
+       function uiSectionPresetFields(context) {
+         var section = uiSection('preset-fields', context).label(_t.html('inspector.fields')).disclosureContent(renderDisclosureContent);
+         var dispatch = dispatch$8('change', 'revert');
+         var formFields = uiFormFields(context);

 
 

-                           help
-                               .append('div')      // "VIA {viaNames}"
-                               .html(_t('restriction.help.via_names', {
-                                   via: placeholders.via,
-                                   viaNames: names.join(', ')
-                               }));
-                       }
+         var _state;

 
 

-                       if (!indirect) {
-                           help
-                               .append('div')      // Click for "No Right Turn"
-                               .text(_t('restriction.help.toggle', { turn: nextText.trim() }));
-                       }
+         var _fieldsArr;

 
 

-                       highlightPathsFrom(null);
-                       var alongIDs = datum.path.slice();
-                       surface.selectAll(utilEntitySelector(alongIDs))
-                           .classed('related', true)
-                           .classed('allow', (klass === 'allow'))
-                           .classed('restrict', (klass === 'restrict'))
-                           .classed('only', (klass === 'only'));
+         var _presets = [];

 
 

+         var _tags;

 
 

-                   // Hovering empty surface
-                   } else {
-                       highlightPathsFrom(null);
-                       if (_fromWayID) {
-                           help
-                               .append('div')      // "FROM {fromName}"
-                               .html(_t('restriction.help.from_name', {
-                                   from: placeholders.from,
-                                   fromName: displayName(_fromWayID, vgraph)
-                               }));
+         var _entityIDs;

 
 

-                       } else {
-                           help
-                               .append('div')      // "Click to select a FROM segment."
-                               .html(_t('restriction.help.select_from', {
-                                   from: placeholders.from
-                               }));
-                       }
-                   }
+         function renderDisclosureContent(selection) {
+           if (!_fieldsArr) {
+             var graph = context.graph();
+             var geometries = Object.keys(_entityIDs.reduce(function (geoms, entityID) {
+               geoms[graph.entity(entityID).geometry(graph)] = true;
+               return geoms;
+             }, {}));
+             var presetsManager = _mainPresetIndex;
+             var allFields = [];
+             var allMoreFields = [];
+             var sharedTotalFields;
+
+             _presets.forEach(function (preset) {
+               var fields = preset.fields();
+               var moreFields = preset.moreFields();
+               allFields = utilArrayUnion(allFields, fields);
+               allMoreFields = utilArrayUnion(allMoreFields, moreFields);
+
+               if (!sharedTotalFields) {
+                 sharedTotalFields = utilArrayUnion(fields, moreFields);
+               } else {
+                 sharedTotalFields = sharedTotalFields.filter(function (field) {
+                   return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
+                 });

                }
                }

-           }
+             });

 
 

+             var sharedFields = allFields.filter(function (field) {
+               return sharedTotalFields.indexOf(field) !== -1;
+             });
+             var sharedMoreFields = allMoreFields.filter(function (field) {
+               return sharedTotalFields.indexOf(field) !== -1;
+             });
+             _fieldsArr = [];
+             sharedFields.forEach(function (field) {
+               if (field.matchAllGeometry(geometries)) {
+                 _fieldsArr.push(uiField(context, field, _entityIDs));
+               }
+             });
+             var singularEntity = _entityIDs.length === 1 && graph.hasEntity(_entityIDs[0]);

 
 

-           function displayMaxDistance(maxDist) {
-               var isImperial = !_mainLocalizer.usesMetric();
-               var opts;
+             if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
+               _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
+             }

 
 

-               if (isImperial) {
-                   var distToFeet = {   // imprecise conversion for prettier display
-                       20: 70, 25: 85, 30: 100, 35: 115, 40: 130, 45: 145, 50: 160
-                   }[maxDist];
-                   opts = { distance: _t('units.feet', { quantity: distToFeet }) };
-               } else {
-                   opts = { distance: _t('units.meters', { quantity: maxDist }) };
+             var additionalFields = utilArrayUnion(sharedMoreFields, presetsManager.universal());
+             additionalFields.sort(function (field1, field2) {
+               return field1.label().localeCompare(field2.label(), _mainLocalizer.localeCode());
+             });
+             additionalFields.forEach(function (field) {
+               if (sharedFields.indexOf(field) === -1 && field.matchAllGeometry(geometries)) {
+                 _fieldsArr.push(uiField(context, field, _entityIDs, {
+                   show: false
+                 }));

                }
                }

+             });

 
 

-               return _t('restriction.controls.distance_up_to', opts);
+             _fieldsArr.forEach(function (field) {
+               field.on('change', function (t, onInput) {
+                 dispatch.call('change', field, _entityIDs, t, onInput);
+               }).on('revert', function (keys) {
+                 dispatch.call('revert', field, keys);
+               });
+             });

            }
 
            }
 

+           _fieldsArr.forEach(function (field) {
+             field.state(_state).tags(_tags);
+           });

 
 

-           function displayMaxVia(maxVia) {
-               return maxVia === 0 ? _t('restriction.controls.via_node_only')
-                   : maxVia === 1 ? _t('restriction.controls.via_up_to_one')
-                   : _t('restriction.controls.via_up_to_two');
-           }
+           selection.call(formFields.fieldsArr(_fieldsArr).state(_state).klass('grouped-items-area'));
+           selection.selectAll('.wrap-form-field input').on('keydown', function (d3_event) {
+             // if user presses enter, and combobox is not active, accept edits..
+             if (d3_event.keyCode === 13 && // ↩ Return
+             context.container().select('.combobox').empty()) {
+               context.enter(modeBrowse(context));
+             }
+           });
+         }

 
 

+         section.presets = function (val) {
+           if (!arguments.length) return _presets;

 
 

-           function displayName(entityID, graph) {
-               var entity = graph.entity(entityID);
-               var name = utilDisplayName(entity) || '';
-               var matched = _mainPresetIndex.match(entity, graph);
-               var type = (matched && matched.name()) || utilDisplayType(entity.id);
-               return name || type;
+           if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
+             _presets = val;
+             _fieldsArr = null;

            }
 
            }
 

+           return section;
+         };

 
 

-           restrictions.entityIDs = function(val) {
-               _intersection = null;
-               _fromWayID = null;
-               _oldTurns = null;
-               _vertexID = val[0];
-           };
-
-
-           restrictions.tags = function() {};
-           restrictions.focus = function() {};
+         section.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return section;
+         };

 
 

+         section.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val; // Don't reset _fieldsArr here.

 
 

-           restrictions.off = function(selection) {
-               if (!_initialized) { return; }
+           return section;
+         };

 
 

-               selection.selectAll('.surface')
-                   .call(breathe.off)
-                   .on('click.restrictions', null)
-                   .on('mouseover.restrictions', null);
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;

 
 

-               select(window)
-                   .on('resize.restrictions', null);
-           };
+           if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
+             _entityIDs = val;
+             _fieldsArr = null;
+           }

 
 

+           return section;
+         };

 
 

-           return utilRebind(restrictions, dispatch$1, 'on');
+         return utilRebind(section, dispatch, 'on');

        }
 
        }
 

-       uiFieldRestrictions.supportsMultiselection = false;
-
-       function uiFieldTextarea(field, context) {
-           var dispatch$1 = dispatch('change');
-           var input = select(null);
-           var _tags;
-
+       function uiSectionRawMemberEditor(context) {
+         var section = uiSection('raw-member-editor', context).shouldDisplay(function () {
+           if (!_entityIDs || _entityIDs.length !== 1) return false;
+           var entity = context.hasEntity(_entityIDs[0]);
+           return entity && entity.type === 'relation';
+         }).label(function () {
+           var entity = context.hasEntity(_entityIDs[0]);
+           if (!entity) return '';
+           var gt = entity.members.length > _maxMembers ? '>' : '';
+           var count = gt + entity.members.slice(0, _maxMembers).length;
+           return _t('inspector.title_count', {
+             title: _t.html('inspector.members'),
+             count: count
+           });
+         }).disclosureContent(renderDisclosureContent);
+         var taginfo = services.taginfo;

 
 

-           function textarea(selection) {
-               var wrap = selection.selectAll('.form-field-input-wrap')
-                   .data([0]);
+         var _entityIDs;

 
 

-               wrap = wrap.enter()
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-                   .merge(wrap);
+         var _maxMembers = 1000;

 
 

-               input = wrap.selectAll('textarea')
-                   .data([0]);
+         function downloadMember(d3_event, d) {
+           d3_event.preventDefault(); // display the loading indicator

 
 

-               input = input.enter()
-                   .append('textarea')
-                   .attr('id', field.domId)
-                   .call(utilNoAuto)
-                   .on('input', change(true))
-                   .on('blur', change())
-                   .on('change', change())
-                   .merge(input);
-           }
+           select(this.parentNode).classed('tag-reference-loading', true);
+           context.loadEntity(d.id, function () {
+             section.reRender();
+           });
+         }

 
 

+         function zoomToMember(d3_event, d) {
+           d3_event.preventDefault();
+           var entity = context.entity(d.id);
+           context.map().zoomToEase(entity); // highlight the feature in case it wasn't previously on-screen

 
 

-           function change(onInput) {
-               return function() {
+           utilHighlightEntities([d.id], true, context);
+         }

 
 

-                   var val = utilGetSetValue(input);
-                   if (!onInput) { val = context.cleanTagValue(val); }
+         function selectMember(d3_event, d) {
+           d3_event.preventDefault(); // remove the hover-highlight styling

 
 

-                   // don't override multiple values with blank string
-                   if (!val && Array.isArray(_tags[field.key])) { return; }
+           utilHighlightEntities([d.id], false, context);
+           var entity = context.entity(d.id);
+           var mapExtent = context.map().extent();

 
 

-                   var t = {};
-                   t[field.key] = val || undefined;
-                   dispatch$1.call('change', this, t, onInput);
-               };
+           if (!entity.intersects(mapExtent, context.graph())) {
+             // zoom to the entity if its extent is not visible now
+             context.map().zoomToEase(entity);

            }
 
            }
 

+           context.enter(modeSelect(context, [d.id]));
+         }

 
 

-           textarea.tags = function(tags) {
-               _tags = tags;
+         function changeRole(d3_event, d) {
+           var oldRole = d.role;
+           var newRole = context.cleanRelationRole(select(this).property('value'));

 
 

-               var isMixed = Array.isArray(tags[field.key]);
+           if (oldRole !== newRole) {
+             var member = {
+               id: d.id,
+               type: d.type,
+               role: newRole
+             };
+             context.perform(actionChangeMember(d.relation.id, member, d.index), _t('operations.change_role.annotation', {
+               n: 1
+             }));
+             context.validator().validate();
+           }
+         }

 
 

-               utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '')
-                   .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined)
-                   .attr('placeholder', isMixed ? _t('inspector.multiple_values') : (field.placeholder() || _t('inspector.unknown')))
-                   .classed('mixed', isMixed);
-           };
+         function deleteMember(d3_event, d) {
+           // remove the hover-highlight styling
+           utilHighlightEntities([d.id], false, context);
+           context.perform(actionDeleteMember(d.relation.id, d.index), _t('operations.delete_member.annotation', {
+             n: 1
+           }));

 
 

+           if (!context.hasEntity(d.relation.id)) {
+             // Removing the last member will also delete the relation.
+             // If this happens we need to exit the selection mode
+             context.enter(modeBrowse(context));
+           } else {
+             // Changing the mode also runs `validate`, but otherwise we need to
+             // rerun it manually
+             context.validator().validate();
+           }
+         }
+
+         function renderDisclosureContent(selection) {
+           var entityID = _entityIDs[0];
+           var memberships = [];
+           var entity = context.entity(entityID);
+           entity.members.slice(0, _maxMembers).forEach(function (member, index) {
+             memberships.push({
+               index: index,
+               id: member.id,
+               type: member.type,
+               role: member.role,
+               relation: entity,
+               member: context.hasEntity(member.id),
+               domId: utilUniqueDomId(entityID + '-member-' + index)
+             });
+           });
+           var list = selection.selectAll('.member-list').data([0]);
+           list = list.enter().append('ul').attr('class', 'member-list').merge(list);
+           var items = list.selectAll('li').data(memberships, function (d) {
+             return osmEntity.key(d.relation) + ',' + d.index + ',' + (d.member ? osmEntity.key(d.member) : 'incomplete');
+           });
+           items.exit().each(unbind).remove();
+           var itemsEnter = items.enter().append('li').attr('class', 'member-row form-field').classed('member-incomplete', function (d) {
+             return !d.member;
+           });
+           itemsEnter.each(function (d) {
+             var item = select(this);
+             var label = item.append('label').attr('class', 'field-label').attr('for', d.domId);
+
+             if (d.member) {
+               // highlight the member feature in the map while hovering on the list item
+               item.on('mouseover', function () {
+                 utilHighlightEntities([d.id], true, context);
+               }).on('mouseout', function () {
+                 utilHighlightEntities([d.id], false, context);
+               });
+               var labelLink = label.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectMember);
+               labelLink.append('span').attr('class', 'member-entity-type').html(function (d) {
+                 var matched = _mainPresetIndex.match(d.member, context.graph());
+                 return matched && matched.name() || utilDisplayType(d.member.id);
+               });
+               labelLink.append('span').attr('class', 'member-entity-name').html(function (d) {
+                 return utilDisplayName(d.member);
+               });
+               label.append('button').attr('title', _t('icons.remove')).attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete'));
+               label.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToMember);
+             } else {
+               var labelText = label.append('span').attr('class', 'label-text');
+               labelText.append('span').attr('class', 'member-entity-type').html(_t.html('inspector.' + d.type, {
+                 id: d.id
+               }));
+               labelText.append('span').attr('class', 'member-entity-name').html(_t.html('inspector.incomplete', {
+                 id: d.id
+               }));
+               label.append('button').attr('class', 'member-download').attr('title', _t('icons.download')).call(svgIcon('#iD-icon-load')).on('click', downloadMember);
+             }
+           });
+           var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+           wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
+             return d.domId;
+           }).property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto);
+
+           if (taginfo) {
+             wrapEnter.each(bindTypeahead);
+           } // update
+
+
+           items = items.merge(itemsEnter).order();
+           items.select('input.member-role').property('value', function (d) {
+             return d.role;
+           }).on('blur', changeRole).on('change', changeRole);
+           items.select('button.member-delete').on('click', deleteMember);
+           var dragOrigin, targetIndex;
+           items.call(d3_drag().on('start', function (d3_event) {
+             dragOrigin = {
+               x: d3_event.x,
+               y: d3_event.y
+             };
+             targetIndex = null;
+           }).on('drag', function (d3_event) {
+             var x = d3_event.x - dragOrigin.x,
+                 y = d3_event.y - dragOrigin.y;
+             if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
+             Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
+             var index = items.nodes().indexOf(this);
+             select(this).classed('dragging', true);
+             targetIndex = null;
+             selection.selectAll('li.member-row').style('transform', function (d2, index2) {
+               var node = select(this).node();
+
+               if (index === index2) {
+                 return 'translate(' + x + 'px, ' + y + 'px)';
+               } else if (index2 > index && d3_event.y > node.offsetTop) {
+                 if (targetIndex === null || index2 > targetIndex) {
+                   targetIndex = index2;
+                 }

 
 

-           textarea.focus = function() {
-               input.node().focus();
-           };
+                 return 'translateY(-100%)';
+               } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+                 if (targetIndex === null || index2 < targetIndex) {
+                   targetIndex = index2;
+                 }

 
 

+                 return 'translateY(100%)';
+               }

 
 

-           return utilRebind(textarea, dispatch$1, 'on');
-       }
+               return null;
+             });
+           }).on('end', function (d3_event, d) {
+             if (!select(this).classed('dragging')) return;
+             var index = items.nodes().indexOf(this);
+             select(this).classed('dragging', false);
+             selection.selectAll('li.member-row').style('transform', null);
+
+             if (targetIndex !== null) {
+               // dragged to a new position, reorder
+               context.perform(actionMoveMember(d.relation.id, index, targetIndex), _t('operations.reorder_members.annotation'));
+               context.validator().validate();
+             }
+           }));

 
 

-       function uiFieldWikidata(field, context) {
-           var wikidata = services.wikidata;
-           var dispatch$1 = dispatch('change');
-
-           var _selection = select(null);
-           var _searchInput = select(null);
-           var _qid = null;
-           var _wikidataEntity = null;
-           var _wikiURL = '';
-           var _entityIDs = [];
-
-           var _wikipediaKey = field.keys && field.keys.find(function(key) {
-                   return key.includes('wikipedia');
-               }),
-               _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
+           function bindTypeahead(d) {
+             var row = select(this);
+             var role = row.selectAll('input.member-role');
+             var origValue = role.property('value');

 
 

-           var combobox = uiCombobox(context, 'combo-' + field.safeid)
-               .caseSensitive(true)
-               .minItems(1);
+             function sort(value, data) {
+               var sameletter = [];
+               var other = [];

 
 

-           function wiki(selection) {
+               for (var i = 0; i < data.length; i++) {
+                 if (data[i].value.substring(0, value.length) === value) {
+                   sameletter.push(data[i]);
+                 } else {
+                   other.push(data[i]);
+                 }
+               }

 
 

-               _selection = selection;
+               return sameletter.concat(other);
+             }

 
 

-               var wrap = selection.selectAll('.form-field-input-wrap')
-                   .data([0]);
+             role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
+               // The `geometry` param is used in the `taginfo.js` interface for
+               // filtering results, as a key into the `tag_members_fractions`
+               // object.  If we don't know the geometry because the member is
+               // not yet downloaded, it's ok to guess based on type.
+               var geometry;
+
+               if (d.member) {
+                 geometry = context.graph().geometry(d.member.id);
+               } else if (d.type === 'relation') {
+                 geometry = 'relation';
+               } else if (d.type === 'way') {
+                 geometry = 'line';
+               } else {
+                 geometry = 'point';
+               }

 
 

-               wrap = wrap.enter()
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-' + field.type)
-                   .merge(wrap);
-
-
-               var list = wrap.selectAll('ul')
-                   .data([0]);
-
-               list = list.enter()
-                   .append('ul')
-                   .attr('class', 'rows')
-                   .merge(list);
-
-               var searchRow = list.selectAll('li.wikidata-search')
-                   .data([0]);
-
-               var searchRowEnter = searchRow.enter()
-                   .append('li')
-                   .attr('class', 'wikidata-search');
-
-               searchRowEnter
-                   .append('input')
-                   .attr('type', 'text')
-                   .attr('id', field.domId)
-                   .style('flex', '1')
-                   .call(utilNoAuto)
-                   .on('focus', function() {
-                       var node = select(this).node();
-                       node.setSelectionRange(0, node.value.length);
-                   })
-                   .on('blur', function() {
-                       setLabelForEntity();
-                   })
-                   .call(combobox.fetcher(fetchWikidataItems));
-
-               combobox.on('accept', function(d) {
-                   _qid = d.id;
-                   change();
-               }).on('cancel', function() {
-                   setLabelForEntity();
+               var rtype = entity.tags.type;
+               taginfo.roles({
+                 debounce: true,
+                 rtype: rtype || '',
+                 geometry: geometry,
+                 query: role
+               }, function (err, data) {
+                 if (!err) callback(sort(role, data));

                });
                });

-
-               searchRowEnter
-                   .append('button')
-                   .attr('class', 'form-field-button wiki-link')
-                   .attr('title', _t('icons.view_on', { domain: 'wikidata.org' }))
-                   .attr('tabindex', -1)
-                   .call(svgIcon('#iD-icon-out-link'))
-                   .on('click', function() {
-                       event.preventDefault();
-                       if (_wikiURL) { window.open(_wikiURL, '_blank'); }
-                   });
-
-               searchRow = searchRow.merge(searchRowEnter);
-
-               _searchInput = searchRow.select('input');
-
-               var wikidataProperties = ['description', 'identifier'];
-
-               var items = list.selectAll('li.labeled-input')
-                   .data(wikidataProperties);
-
-               // Enter
-               var enter = items.enter()
-                   .append('li')
-                   .attr('class', function(d) { return 'labeled-input preset-wikidata-' + d; });
-
-               enter
-                   .append('span')
-                   .attr('class', 'label')
-                   .text(function(d) { return _t('wikidata.' + d); });
-
-               enter
-                   .append('input')
-                   .attr('type', 'text')
-                   .call(utilNoAuto)
-                   .classed('disabled', 'true')
-                   .attr('readonly', 'true');
-
-               enter
-                   .append('button')
-                   .attr('class', 'form-field-button')
-                   .attr('title', _t('icons.copy'))
-                   .attr('tabindex', -1)
-                   .call(svgIcon('#iD-operation-copy'))
-                   .on('click', function() {
-                       event.preventDefault();
-                       select(this.parentNode)
-                           .select('input')
-                           .node()
-                           .select();
-                       document.execCommand('copy');
-                   });
-
+             }).on('cancel', function () {
+               role.property('value', origValue);
+             }));

            }
 
            }
 

-           function fetchWikidataItems(q, callback) {
+           function unbind() {
+             var row = select(this);
+             row.selectAll('input.member-role').call(uiCombobox.off, context);
+           }
+         }

 
 

-               if (!q && _hintKey) {
-                   // other tags may be good search terms
-                   for (var i in _entityIDs) {
-                       var entity = context.hasEntity(_entityIDs[i]);
-                       if (entity.tags[_hintKey]) {
-                           q = entity.tags[_hintKey];
-                           break;
-                       }
-                   }
-               }
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return section;
+         };

 
 

-               wikidata.itemsForSearchQuery(q, function(err, data) {
-                   if (err) { return; }
+         return section;
+       }

 
 

-                   for (var i in data) {
-                       data[i].value = data[i].label + ' (' +  data[i].id + ')';
-                       data[i].title = data[i].description;
-                   }
+       function actionDeleteMembers(relationId, memberIndexes) {
+         return function (graph) {
+           // Remove the members in descending order so removals won't shift what members
+           // are at the remaining indexes
+           memberIndexes.sort(function (a, b) {
+             return b - a;
+           });

 
 

-                   if (callback) { callback(data); }
-               });
+           for (var i in memberIndexes) {
+             graph = actionDeleteMember(relationId, memberIndexes[i])(graph);

            }
 
            }
 

+           return graph;
+         };
+       }

 
 

-           function change() {
-               var syncTags = {};
-               syncTags[field.key] = _qid;
-               dispatch$1.call('change', this, syncTags);
+       function uiSectionRawMembershipEditor(context) {
+         var section = uiSection('raw-membership-editor', context).shouldDisplay(function () {
+           return _entityIDs && _entityIDs.length;
+         }).label(function () {
+           var parents = getSharedParentRelations();
+           var gt = parents.length > _maxMemberships ? '>' : '';
+           var count = gt + parents.slice(0, _maxMemberships).length;
+           return _t('inspector.title_count', {
+             title: _t.html('inspector.relations'),
+             count: count
+           });
+         }).disclosureContent(renderDisclosureContent);
+         var taginfo = services.taginfo;
+         var nearbyCombo = uiCombobox(context, 'parent-relation').minItems(1).fetcher(fetchNearbyRelations).itemsMouseEnter(function (d3_event, d) {
+           if (d.relation) utilHighlightEntities([d.relation.id], true, context);
+         }).itemsMouseLeave(function (d3_event, d) {
+           if (d.relation) utilHighlightEntities([d.relation.id], false, context);
+         });
+         var _inChange = false;
+         var _entityIDs = [];

 
 

-               // attempt asynchronous update of wikidata tag..
-               var initGraph = context.graph();
-               var initEntityIDs = _entityIDs;
+         var _showBlank;

 
 

-               wikidata.entityByQID(_qid, function(err, entity) {
-                   if (err) { return; }
+         var _maxMemberships = 1000;

 
 

-                   // If graph has changed, we can't apply this update.
-                   if (context.graph() !== initGraph) { return; }
+         function getSharedParentRelations() {
+           var parents = [];

 
 

-                   if (!entity.sitelinks) { return; }
+           for (var i = 0; i < _entityIDs.length; i++) {
+             var entity = context.graph().hasEntity(_entityIDs[i]);
+             if (!entity) continue;

 
 

-                   var langs = wikidata.languagesToQuery();
-                   // use the label and description languages as fallbacks
-                   ['labels', 'descriptions'].forEach(function(key) {
-                       if (!entity[key]) { return; }
+             if (i === 0) {
+               parents = context.graph().parentRelations(entity);
+             } else {
+               parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
+             }

 
 

-                       var valueLangs = Object.keys(entity[key]);
-                       if (valueLangs.length === 0) { return; }
-                       var valueLang = valueLangs[0];
+             if (!parents.length) break;
+           }

 
 

-                       if (langs.indexOf(valueLang) === -1) {
-                           langs.push(valueLang);
-                       }
-                   });
+           return parents;
+         }

 
 

-                   var newWikipediaValue;
-
-                   if (_wikipediaKey) {
-                       var foundPreferred;
-                       for (var i in langs) {
-                           var lang = langs[i];
-                           var siteID = lang.replace('-', '_') + 'wiki';
-                           if (entity.sitelinks[siteID]) {
-                               foundPreferred = true;
-                               newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title;
-                               // use the first match
-                               break;
-                           }
-                       }
+         function getMemberships() {
+           var memberships = [];
+           var relations = getSharedParentRelations().slice(0, _maxMemberships);
+           var isMultiselect = _entityIDs.length > 1;
+           var i, relation, membership, index, member, indexedMember;

 
 

-                       if (!foundPreferred) {
-                           // No wikipedia sites available in the user's language or the fallback languages,
-                           // default to any wikipedia sitelink
+           for (i = 0; i < relations.length; i++) {
+             relation = relations[i];
+             membership = {
+               relation: relation,
+               members: [],
+               hash: osmEntity.key(relation)
+             };

 
 

-                           var wikiSiteKeys = Object.keys(entity.sitelinks).filter(function(site) {
-                               return site.endsWith('wiki');
-                           });
+             for (index = 0; index < relation.members.length; index++) {
+               member = relation.members[index];

 
 

-                           if (wikiSiteKeys.length === 0) {
-                               // if no wikipedia pages are linked to this wikidata entity, delete that tag
-                               newWikipediaValue = null;
-                           } else {
-                               var wikiLang = wikiSiteKeys[0].slice(0, -4).replace('_', '-');
-                               var wikiTitle = entity.sitelinks[wikiSiteKeys[0]].title;
-                               newWikipediaValue = wikiLang + ':' + wikiTitle;
-                           }
-                       }
-                   }
+               if (_entityIDs.indexOf(member.id) !== -1) {
+                 indexedMember = Object.assign({}, member, {
+                   index: index
+                 });
+                 membership.members.push(indexedMember);
+                 membership.hash += ',' + index.toString();
+
+                 if (!isMultiselect) {
+                   // For single selections, list one entry per membership per relation.
+                   // For multiselections, list one entry per relation.
+                   memberships.push(membership);
+                   membership = {
+                     relation: relation,
+                     members: [],
+                     hash: osmEntity.key(relation)
+                   };
+                 }
+               }
+             }

 
 

-                   if (newWikipediaValue) {
-                       newWikipediaValue = context.cleanTagValue(newWikipediaValue);
-                   }
+             if (membership.members.length) memberships.push(membership);
+           }
+
+           memberships.forEach(function (membership) {
+             membership.domId = utilUniqueDomId('membership-' + membership.relation.id);
+             var roles = [];
+             membership.members.forEach(function (member) {
+               if (roles.indexOf(member.role) === -1) roles.push(member.role);
+             });
+             membership.role = roles.length === 1 ? roles[0] : roles;
+           });
+           return memberships;
+         }

 
 

-                   if (typeof newWikipediaValue === 'undefined') { return; }
+         function selectRelation(d3_event, d) {
+           d3_event.preventDefault(); // remove the hover-highlight styling

 
 

-                   var actions = initEntityIDs.map(function(entityID) {
-                       var entity = context.hasEntity(entityID);
-                       if (!entity) { return; }
+           utilHighlightEntities([d.relation.id], false, context);
+           context.enter(modeSelect(context, [d.relation.id]));
+         }

 
 

-                       var currTags = Object.assign({}, entity.tags);  // shallow copy
-                       if (newWikipediaValue === null) {
-                           if (!currTags[_wikipediaKey]) { return; }
+         function zoomToRelation(d3_event, d) {
+           d3_event.preventDefault();
+           var entity = context.entity(d.relation.id);
+           context.map().zoomToEase(entity); // highlight the relation in case it wasn't previously on-screen

 
 

-                           delete currTags[_wikipediaKey];
-                       } else {
-                           currTags[_wikipediaKey] = newWikipediaValue;
-                       }
+           utilHighlightEntities([d.relation.id], true, context);
+         }

 
 

-                       return actionChangeTags(entityID, currTags);
-                   }).filter(Boolean);
+         function changeRole(d3_event, d) {
+           if (d === 0) return; // called on newrow (shouldn't happen)

 
 

-                   if (!actions.length) { return; }
+           if (_inChange) return; // avoid accidental recursive call #5731

 
 

-                   // Coalesce the update of wikidata tag into the previous tag change
-                   context.overwrite(
-                       function actionUpdateWikipediaTags(graph) {
-                           actions.forEach(function(action) {
-                               graph = action(graph);
-                           });
-                           return graph;
-                       },
-                       context.history().undoAnnotation()
-                   );
+           var newRole = context.cleanRelationRole(select(this).property('value'));
+           if (!newRole.trim() && typeof d.role !== 'string') return;
+           var membersToUpdate = d.members.filter(function (member) {
+             return member.role !== newRole;
+           });

 
 

-                   // do not dispatch.call('change') here, because entity_editor
-                   // changeTags() is not intended to be called asynchronously
+           if (membersToUpdate.length) {
+             _inChange = true;
+             context.perform(function actionChangeMemberRoles(graph) {
+               membersToUpdate.forEach(function (member) {
+                 var newMember = Object.assign({}, member, {
+                   role: newRole
+                 });
+                 delete newMember.index;
+                 graph = actionChangeMember(d.relation.id, newMember, member.index)(graph);

                });
                });

+               return graph;
+             }, _t('operations.change_role.annotation', {
+               n: membersToUpdate.length
+             }));
+             context.validator().validate();

            }
 
            }
 

-           function setLabelForEntity() {
-               var label = '';
-               if (_wikidataEntity) {
-                   label = entityPropertyForDisplay(_wikidataEntity, 'labels');
-                   if (label.length === 0) {
-                       label = _wikidataEntity.id.toString();
-                   }
-               }
-               utilGetSetValue(_searchInput, label);
-           }
+           _inChange = false;
+         }

 
 

+         function addMembership(d, role) {
+           this.blur(); // avoid keeping focus on the button

 
 

-           wiki.tags = function(tags) {
+           _showBlank = false;

 
 

-               var isMixed = Array.isArray(tags[field.key]);
-               _searchInput
-                   .attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null)
-                   .attr('placeholder', isMixed ? _t('inspector.multiple_values') : '')
-                   .classed('mixed', isMixed);
+           function actionAddMembers(relationId, ids, role) {
+             return function (graph) {
+               for (var i in ids) {
+                 var member = {
+                   id: ids[i],
+                   type: graph.entity(ids[i]).type,
+                   role: role
+                 };
+                 graph = actionAddMember(relationId, member)(graph);
+               }

 
 

-               _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
+               return graph;
+             };
+           }

 
 

-               if (!/^Q[0-9]*$/.test(_qid)) {   // not a proper QID
-                   unrecognized();
-                   return;
-               }
+           if (d.relation) {
+             context.perform(actionAddMembers(d.relation.id, _entityIDs, role), _t('operations.add_member.annotation', {
+               n: _entityIDs.length
+             }));
+             context.validator().validate();
+           } else {
+             var relation = osmRelation();
+             context.perform(actionAddEntity(relation), actionAddMembers(relation.id, _entityIDs, role), _t('operations.add.annotation.relation')); // changing the mode also runs `validate`

 
 

-               // QID value in correct format
-               _wikiURL = 'https://wikidata.org/wiki/' + _qid;
-               wikidata.entityByQID(_qid, function(err, entity) {
-                   if (err) {
-                       unrecognized();
-                       return;
-                   }
-                   _wikidataEntity = entity;
+             context.enter(modeSelect(context, [relation.id]).newFeature(true));
+           }
+         }

 
 

-                   setLabelForEntity();
+         function deleteMembership(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button

 
 

-                   var description = entityPropertyForDisplay(entity, 'descriptions');
+           if (d === 0) return; // called on newrow (shouldn't happen)
+           // remove the hover-highlight styling

 
 

-                   _selection.select('button.wiki-link')
-                       .classed('disabled', false);
+           utilHighlightEntities([d.relation.id], false, context);
+           var indexes = d.members.map(function (member) {
+             return member.index;
+           });
+           context.perform(actionDeleteMembers(d.relation.id, indexes), _t('operations.delete_member.annotation', {
+             n: _entityIDs.length
+           }));
+           context.validator().validate();
+         }

 
 

-                   _selection.select('.preset-wikidata-description')
-                       .style('display', function(){
-                           return description.length > 0 ? 'flex' : 'none';
-                       })
-                       .select('input')
-                       .attr('value', description);
+         function fetchNearbyRelations(q, callback) {
+           var newRelation = {
+             relation: null,
+             value: _t('inspector.new_relation'),
+             display: _t.html('inspector.new_relation')
+           };
+           var entityID = _entityIDs[0];
+           var result = [];
+           var graph = context.graph();

 
 

-                   _selection.select('.preset-wikidata-identifier')
-                       .style('display', function(){
-                           return entity.id ? 'flex' : 'none';
-                       })
-                       .select('input')
-                       .attr('value', entity.id);
+           function baseDisplayLabel(entity) {
+             var matched = _mainPresetIndex.match(entity, graph);
+             var presetName = matched && matched.name() || _t('inspector.relation');
+             var entityName = utilDisplayName(entity) || '';
+             return presetName + ' ' + entityName;
+           }
+
+           var explicitRelation = q && context.hasEntity(q.toLowerCase());
+
+           if (explicitRelation && explicitRelation.type === 'relation' && explicitRelation.id !== entityID) {
+             // loaded relation is specified explicitly, only show that
+             result.push({
+               relation: explicitRelation,
+               value: baseDisplayLabel(explicitRelation) + ' ' + explicitRelation.id
+             });
+           } else {
+             context.history().intersects(context.map().extent()).forEach(function (entity) {
+               if (entity.type !== 'relation' || entity.id === entityID) return;
+               var value = baseDisplayLabel(entity);
+               if (q && (value + ' ' + entity.id).toLowerCase().indexOf(q.toLowerCase()) === -1) return;
+               result.push({
+                 relation: entity,
+                 value: value

                });
                });

+             });
+             result.sort(function (a, b) {
+               return osmRelation.creationOrder(a.relation, b.relation);
+             }); // Dedupe identical names by appending relation id - see #2891

 
 

+             var dupeGroups = Object.values(utilArrayGroupBy(result, 'value')).filter(function (v) {
+               return v.length > 1;
+             });
+             dupeGroups.forEach(function (group) {
+               group.forEach(function (obj) {
+                 obj.value += ' ' + obj.relation.id;
+               });
+             });
+           }

 
 

-               // not a proper QID
-               function unrecognized() {
-                   _wikidataEntity = null;
-                   setLabelForEntity();
+           result.forEach(function (obj) {
+             obj.title = obj.value;
+           });
+           result.unshift(newRelation);
+           callback(result);
+         }

 
 

-                   _selection.select('.preset-wikidata-description')
-                       .style('display', 'none');
-                   _selection.select('.preset-wikidata-identifier')
-                       .style('display', 'none');
+         function renderDisclosureContent(selection) {
+           var memberships = getMemberships();
+           var list = selection.selectAll('.member-list').data([0]);
+           list = list.enter().append('ul').attr('class', 'member-list').merge(list);
+           var items = list.selectAll('li.member-row-normal').data(memberships, function (d) {
+             return d.hash;
+           });
+           items.exit().each(unbind).remove(); // Enter

 
 

-                   _selection.select('button.wiki-link')
-                       .classed('disabled', true);
+           var itemsEnter = items.enter().append('li').attr('class', 'member-row member-row-normal form-field'); // highlight the relation in the map while hovering on the list item

 
 

-                   if (_qid && _qid !== '') {
-                       _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
-                   } else {
-                       _wikiURL = '';
-                   }
-               }
-           };
+           itemsEnter.on('mouseover', function (d3_event, d) {
+             utilHighlightEntities([d.relation.id], true, context);
+           }).on('mouseout', function (d3_event, d) {
+             utilHighlightEntities([d.relation.id], false, context);
+           });
+           var labelEnter = itemsEnter.append('label').attr('class', 'field-label').attr('for', function (d) {
+             return d.domId;
+           });
+           var labelLink = labelEnter.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectRelation);
+           labelLink.append('span').attr('class', 'member-entity-type').html(function (d) {
+             var matched = _mainPresetIndex.match(d.relation, context.graph());
+             return matched && matched.name() || _t('inspector.relation');
+           });
+           labelLink.append('span').attr('class', 'member-entity-name').html(function (d) {
+             return utilDisplayName(d.relation);
+           });
+           labelEnter.append('button').attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete')).on('click', deleteMembership);
+           labelEnter.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToRelation);
+           var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+           wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
+             return d.domId;
+           }).property('type', 'text').property('value', function (d) {
+             return typeof d.role === 'string' ? d.role : '';
+           }).attr('title', function (d) {
+             return Array.isArray(d.role) ? d.role.filter(Boolean).join('\n') : d.role;
+           }).attr('placeholder', function (d) {
+             return Array.isArray(d.role) ? _t('inspector.multiple_roles') : _t('inspector.role');
+           }).classed('mixed', function (d) {
+             return Array.isArray(d.role);
+           }).call(utilNoAuto).on('blur', changeRole).on('change', changeRole);
+
+           if (taginfo) {
+             wrapEnter.each(bindTypeahead);
+           }
+
+           var newMembership = list.selectAll('.member-row-new').data(_showBlank ? [0] : []); // Exit
+
+           newMembership.exit().remove(); // Enter
+
+           var newMembershipEnter = newMembership.enter().append('li').attr('class', 'member-row member-row-new form-field');
+           var newLabelEnter = newMembershipEnter.append('label').attr('class', 'field-label');
+           newLabelEnter.append('input').attr('placeholder', _t('inspector.choose_relation')).attr('type', 'text').attr('class', 'member-entity-input').call(utilNoAuto);
+           newLabelEnter.append('button').attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete')).on('click', function () {
+             list.selectAll('.member-row-new').remove();
+           });
+           var newWrapEnter = newMembershipEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+           newWrapEnter.append('input').attr('class', 'member-role').property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto); // Update

 
 

-           function entityPropertyForDisplay(wikidataEntity, propKey) {
-               if (!wikidataEntity[propKey]) { return ''; }
-               var propObj = wikidataEntity[propKey];
-               var langKeys = Object.keys(propObj);
-               if (langKeys.length === 0) { return ''; }
-               // sorted by priority, since we want to show the user's language first if possible
-               var langs = wikidata.languagesToQuery();
-               for (var i in langs) {
-                   var lang = langs[i];
-                   var valueObj = propObj[lang];
-                   if (valueObj && valueObj.value && valueObj.value.length > 0) { return valueObj.value; }
-               }
-               // default to any available value
-               return propObj[langKeys[0]].value;
-           }
+           newMembership = newMembership.merge(newMembershipEnter);
+           newMembership.selectAll('.member-entity-input').on('blur', cancelEntity) // if it wasn't accepted normally, cancel it
+           .call(nearbyCombo.on('accept', acceptEntity).on('cancel', cancelEntity)); // Container for the Add button

 
 

+           var addRow = selection.selectAll('.add-row').data([0]); // enter

 
 

-           wiki.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               _entityIDs = val;
-               return wiki;
-           };
+           var addRowEnter = addRow.enter().append('div').attr('class', 'add-row');
+           var addRelationButton = addRowEnter.append('button').attr('class', 'add-relation');
+           addRelationButton.call(svgIcon('#iD-icon-plus', 'light'));
+           addRelationButton.call(uiTooltip().title(_t.html('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
+           addRowEnter.append('div').attr('class', 'space-value'); // preserve space

 
 

+           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+           // update

 
 

-           wiki.focus = function() {
-               _searchInput.node().focus();
-           };
+           addRow = addRow.merge(addRowEnter);
+           addRow.select('.add-relation').on('click', function () {
+             _showBlank = true;
+             section.reRender();
+             list.selectAll('.member-entity-input').node().focus();
+           });

 
 

+           function acceptEntity(d) {
+             if (!d) {
+               cancelEntity();
+               return;
+             } // remove hover-higlighting

 
 

-           return utilRebind(wiki, dispatch$1, 'on');
-       }

 
 

-       function uiFieldWikipedia(field, context) {
-         var arguments$1 = arguments;
+             if (d.relation) utilHighlightEntities([d.relation.id], false, context);
+             var role = context.cleanRelationRole(list.selectAll('.member-row-new .member-role').property('value'));
+             addMembership(d, role);
+           }

 
 

-         var dispatch$1 = dispatch('change');
-         var wikipedia = services.wikipedia;
-         var wikidata = services.wikidata;
-         var _langInput = select(null);
-         var _titleInput = select(null);
-         var _wikiURL = '';
-         var _entityIDs;
-         var _tags;
+           function cancelEntity() {
+             var input = newMembership.selectAll('.member-entity-input');
+             input.property('value', ''); // remove hover-higlighting

 
 

-         var _dataWikipedia = [];
-         _mainFileFetcher.get('wmf_sitematrix')
-           .then(function (d) {
-             _dataWikipedia = d;
-             if (_tags) { updateForTags(_tags); }
-           })
-           .catch(function () { /* ignore */ });
+             context.surface().selectAll('.highlighted').classed('highlighted', false);
+           }

 
 

+           function bindTypeahead(d) {
+             var row = select(this);
+             var role = row.selectAll('input.member-role');
+             var origValue = role.property('value');

 
 

-         var langCombo = uiCombobox(context, 'wikipedia-lang')
-           .fetcher(function (value, callback) {
-             var v = value.toLowerCase();
-             callback(_dataWikipedia
-               .filter(function (d) {
-                 return d[0].toLowerCase().indexOf(v) >= 0 ||
-                   d[1].toLowerCase().indexOf(v) >= 0 ||
-                   d[2].toLowerCase().indexOf(v) >= 0;
-               })
-               .map(function (d) { return ({ value: d[1] }); })
-             );
-           });
+             function sort(value, data) {
+               var sameletter = [];
+               var other = [];

 
 

-         var titleCombo = uiCombobox(context, 'wikipedia-title')
-           .fetcher(function (value, callback) {
-             if (!value) {
-               value = '';
-               for (var i in _entityIDs) {
-                 var entity = context.hasEntity(_entityIDs[i]);
-                 if (entity.tags.name) {
-                   value = entity.tags.name;
-                   break;
+               for (var i = 0; i < data.length; i++) {
+                 if (data[i].value.substring(0, value.length) === value) {
+                   sameletter.push(data[i]);
+                 } else {
+                   other.push(data[i]);

                  }
                }
                  }
                }

+
+               return sameletter.concat(other);

              }
              }

-             var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
-             searchfn(language()[2], value, function (query, data) {
-               callback( data.map(function (d) { return ({ value: d }); }) );
-             });
+
+             role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
+               var rtype = d.relation.tags.type;
+               taginfo.roles({
+                 debounce: true,
+                 rtype: rtype || '',
+                 geometry: context.graph().geometry(_entityIDs[0]),
+                 query: role
+               }, function (err, data) {
+                 if (!err) callback(sort(role, data));
+               });
+             }).on('cancel', function () {
+               role.property('value', origValue);
+             }));
+           }
+
+           function unbind() {
+             var row = select(this);
+             row.selectAll('input.member-role').call(uiCombobox.off, context);
+           }
+         }
+
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _showBlank = false;
+           return section;
+         };
+
+         return section;
+       }
+
+       function uiSectionSelectionList(context) {
+         var _selectedIDs = [];
+         var section = uiSection('selected-features', context).shouldDisplay(function () {
+           return _selectedIDs.length > 1;
+         }).label(function () {
+           return _t('inspector.title_count', {
+             title: _t.html('inspector.features'),
+             count: _selectedIDs.length

            });
            });

+         }).disclosureContent(renderDisclosureContent);
+         context.history().on('change.selectionList', function (difference) {
+           if (difference) {
+             section.reRender();
+           }
+         });

 
 

+         section.entityIDs = function (val) {
+           if (!arguments.length) return _selectedIDs;
+           _selectedIDs = val;
+           return section;
+         };

 
 

-         function wiki(selection) {
-           var wrap = selection.selectAll('.form-field-input-wrap')
-             .data([0]);
+         function selectEntity(d3_event, entity) {
+           context.enter(modeSelect(context, [entity.id]));
+         }

 
 

-           wrap = wrap.enter()
-             .append('div')
-             .attr('class', ("form-field-input-wrap form-field-input-" + (field.type)))
-             .merge(wrap);
+         function deselectEntity(d3_event, entity) {
+           var selectedIDs = _selectedIDs.slice();

 
 

+           var index = selectedIDs.indexOf(entity.id);

 
 

-           var langContainer = wrap.selectAll('.wiki-lang-container')
-             .data([0]);
+           if (index > -1) {
+             selectedIDs.splice(index, 1);
+             context.enter(modeSelect(context, selectedIDs));
+           }
+         }

 
 

-           langContainer = langContainer.enter()
-             .append('div')
-             .attr('class', 'wiki-lang-container')
-             .merge(langContainer);
+         function renderDisclosureContent(selection) {
+           var list = selection.selectAll('.feature-list').data([0]);
+           list = list.enter().append('ul').attr('class', 'feature-list').merge(list);

 
 

+           var entities = _selectedIDs.map(function (id) {
+             return context.hasEntity(id);
+           }).filter(Boolean);

 
 

-           _langInput = langContainer.selectAll('input.wiki-lang')
-             .data([0]);
+           var items = list.selectAll('.feature-list-item').data(entities, osmEntity.key);
+           items.exit().remove(); // Enter

 
 

-           _langInput = _langInput.enter()
-             .append('input')
-             .attr('type', 'text')
-             .attr('class', 'wiki-lang')
-             .attr('placeholder', _t('translate.localized_translation_language'))
-             .call(utilNoAuto)
-             .call(langCombo)
-             .merge(_langInput);
+           var enter = items.enter().append('li').attr('class', 'feature-list-item').each(function (d) {
+             select(this).on('mouseover', function () {
+               utilHighlightEntities([d.id], true, context);
+             }).on('mouseout', function () {
+               utilHighlightEntities([d.id], false, context);
+             });
+           });
+           var label = enter.append('button').attr('class', 'label').on('click', selectEntity);
+           label.append('span').attr('class', 'entity-geom-icon').call(svgIcon('', 'pre-text'));
+           label.append('span').attr('class', 'entity-type');
+           label.append('span').attr('class', 'entity-name');
+           enter.append('button').attr('class', 'close').attr('title', _t('icons.deselect')).on('click', deselectEntity).call(svgIcon('#iD-icon-close')); // Update
+
+           items = items.merge(enter);
+           items.selectAll('.entity-geom-icon use').attr('href', function () {
+             var entity = this.parentNode.parentNode.__data__;
+             return '#iD-icon-' + entity.geometry(context.graph());
+           });
+           items.selectAll('.entity-type').html(function (entity) {
+             return _mainPresetIndex.match(entity, context.graph()).name();
+           });
+           items.selectAll('.entity-name').html(function (d) {
+             // fetch latest entity
+             var entity = context.entity(d.id);
+             return utilDisplayName(entity);
+           });
+         }

 
 

-           utilGetSetValue(_langInput, language()[1]);
+         return section;
+       }

 
 

-           _langInput
-             .on('blur', changeLang)
-             .on('change', changeLang);
+       function uiEntityEditor(context) {
+         var dispatch = dispatch$8('choose');
+         var _state = 'select';
+         var _coalesceChanges = false;
+         var _modified = false;

 
 

+         var _base;

 
 

-           var titleContainer = wrap.selectAll('.wiki-title-container')
-             .data([0]);
+         var _entityIDs;

 
 

-           titleContainer = titleContainer.enter()
-             .append('div')
-             .attr('class', 'wiki-title-container')
-             .merge(titleContainer);
+         var _activePresets = [];

 
 

-           _titleInput = titleContainer.selectAll('input.wiki-title')
-             .data([0]);
+         var _newFeature;

 
 

-           _titleInput = _titleInput.enter()
-             .append('input')
-             .attr('type', 'text')
-             .attr('class', 'wiki-title')
-             .attr('id', field.domId)
-             .call(utilNoAuto)
-             .call(titleCombo)
-             .merge(_titleInput);
+         var _sections;

 
 

-           _titleInput
-             .on('blur', blur)
-             .on('change', change);
+         function entityEditor(selection) {
+           var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header

 
 

+           var header = selection.selectAll('.header').data([0]); // Enter

 
 

-           var link = titleContainer.selectAll('.wiki-link')
-             .data([0]);
+           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'preset-reset preset-choose').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-forward' : '#iD-icon-backward'));
+           headerEnter.append('button').attr('class', 'close').on('click', function () {
+             context.enter(modeBrowse(context));
+           }).call(svgIcon(_modified ? '#iD-icon-apply' : '#iD-icon-close'));
+           headerEnter.append('h3'); // Update

 
 

-           link = link.enter()
-             .append('button')
-             .attr('class', 'form-field-button wiki-link')
-             .attr('tabindex', -1)
-             .attr('title', _t('icons.view_on', { domain: 'wikipedia.org' }))
-             .call(svgIcon('#iD-icon-out-link'))
-             .merge(link);
+           header = header.merge(headerEnter);
+           header.selectAll('h3').html(_entityIDs.length === 1 ? _t.html('inspector.edit') : _t.html('inspector.edit_features'));
+           header.selectAll('.preset-reset').on('click', function () {
+             dispatch.call('choose', this, _activePresets);
+           }); // Body

 
 

-           link
-             .on('click', function () {
-               event.preventDefault();
-               if (_wikiURL) { window.open(_wikiURL, '_blank'); }
-             });
-         }
+           var body = selection.selectAll('.inspector-body').data([0]); // Enter

 
 

+           var bodyEnter = body.enter().append('div').attr('class', 'entity-editor inspector-body sep-top'); // Update

 
 

-         function language() {
-           var value = utilGetSetValue(_langInput).toLowerCase();
-           var locale = _mainLocalizer.localeCode().toLowerCase();
-           var localeLanguage;
-           return _dataWikipedia.find(function (d) {
-             if (d[2] === locale) { localeLanguage = d; }
-             return d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value;
-           }) || localeLanguage || ['English', 'English', 'en'];
-         }
+           body = body.merge(bodyEnter);

 
 

+           if (!_sections) {
+             _sections = [uiSectionSelectionList(context), uiSectionFeatureType(context).on('choose', function (presets) {
+               dispatch.call('choose', this, presets);
+             }), uiSectionEntityIssues(context), uiSectionPresetFields(context).on('change', changeTags).on('revert', revertTags), uiSectionRawTagEditor('raw-tag-editor', context).on('change', changeTags), uiSectionRawMemberEditor(context), uiSectionRawMembershipEditor(context)];
+           }

 
 

-         function changeLang() {
-           utilGetSetValue(_langInput, language()[1]);
-           change(true);
-         }
+           _sections.forEach(function (section) {
+             if (section.entityIDs) {
+               section.entityIDs(_entityIDs);
+             }

 
 

+             if (section.presets) {
+               section.presets(_activePresets);
+             }

 
 

-         function blur() {
-           change(true);
-         }
+             if (section.tags) {
+               section.tags(combinedTags);
+             }

 
 

+             if (section.state) {
+               section.state(_state);
+             }

 
 

-         function change(skipWikidata) {
-           var value = utilGetSetValue(_titleInput);
-           var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
-           var l = m && _dataWikipedia.find(function (d) { return m[1] === d[2]; });
-           var syncTags = {};
+             body.call(section.render);
+           });

 
 

-           if (l) {
-             // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
-             value = decodeURIComponent(m[2]).replace(/_/g, ' ');
-             if (m[3]) {
-               var anchor;
-               // try {
-               // leave this out for now - #6232
-                 // Best-effort `anchordecode:` implementation
-                 // anchor = decodeURIComponent(m[3].replace(/\.([0-9A-F]{2})/g, '%$1'));
-               // } catch (e) {
-               anchor = decodeURIComponent(m[3]);
-               // }
-               value += '#' + anchor.replace(/_/g, ' ');
+           context.history().on('change.entity-editor', historyChanged);
+
+           function historyChanged(difference) {
+             if (selection.selectAll('.entity-editor').empty()) return;
+             if (_state === 'hide') return;
+             var significant = !difference || difference.didChange.properties || difference.didChange.addition || difference.didChange.deletion;
+             if (!significant) return;
+             _entityIDs = _entityIDs.filter(context.hasEntity);
+             if (!_entityIDs.length) return;
+             var priorActivePreset = _activePresets.length === 1 && _activePresets[0];
+             loadActivePresets();
+             var graph = context.graph();
+             entityEditor.modified(_base !== graph);
+             entityEditor(selection);
+
+             if (priorActivePreset && _activePresets.length === 1 && priorActivePreset !== _activePresets[0]) {
+               // flash the button to indicate the preset changed
+               context.container().selectAll('.entity-editor button.preset-reset .label').style('background-color', '#fff').transition().duration(750).style('background-color', null);

              }
              }

-             value = value.slice(0, 1).toUpperCase() + value.slice(1);
-             utilGetSetValue(_langInput, l[1]);
-             utilGetSetValue(_titleInput, value);

            }
            }

+         } // Tag changes that fire on input can all get coalesced into a single
+         // history operation when the user leaves the field.  #2342
+         // Use explicit entityIDs in case the selection changes before the event is fired.

 
 

-           if (value) {
-             syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
-           } else {
-             syncTags.wikipedia = undefined;
-           }

 
 

-           dispatch$1.call('change', this, syncTags);
+         function changeTags(entityIDs, changed, onInput) {
+           var actions = [];

 
 

+           for (var i in entityIDs) {
+             var entityID = entityIDs[i];
+             var entity = context.entity(entityID);
+             var tags = Object.assign({}, entity.tags); // shallow copy

 
 

-           if (skipWikidata || !value || !language()[2]) { return; }
+             for (var k in changed) {
+               if (!k) continue;
+               var v = changed[k];

 
 

-           // attempt asynchronous update of wikidata tag..
-           var initGraph = context.graph();
-           var initEntityIDs = _entityIDs;
+               if (v !== undefined || tags.hasOwnProperty(k)) {
+                 tags[k] = v;
+               }
+             }

 
 

-           wikidata.itemsByTitle(language()[2], value, function (err, data) {
-             if (err || !data || !Object.keys(data).length) { return; }
+             if (!onInput) {
+               tags = utilCleanTags(tags);
+             }

 
 

-             // If graph has changed, we can't apply this update.
-             if (context.graph() !== initGraph) { return; }
+             if (!fastDeepEqual(entity.tags, tags)) {
+               actions.push(actionChangeTags(entityID, tags));
+             }
+           }

 
 

-             var qids = Object.keys(data);
-             var value = qids && qids.find(function (id) { return id.match(/^Q\d+$/); });
+           if (actions.length) {
+             var combinedAction = function combinedAction(graph) {
+               actions.forEach(function (action) {
+                 graph = action(graph);
+               });
+               return graph;
+             };

 
 

-             var actions = initEntityIDs.map(function (entityID) {
-               var entity = context.entity(entityID).tags;
-               var currTags = Object.assign({}, entity);  // shallow copy
-               if (currTags.wikidata !== value) {
-                   currTags.wikidata = value;
-                   return actionChangeTags(entityID, currTags);
-               }
-             }).filter(Boolean);
+             var annotation = _t('operations.change_tags.annotation');

 
 

-             if (!actions.length) { return; }
+             if (_coalesceChanges) {
+               context.overwrite(combinedAction, annotation);
+             } else {
+               context.perform(combinedAction, annotation);
+               _coalesceChanges = !!onInput;
+             }
+           } // if leaving field (blur event), rerun validation

 
 

-             // Coalesce the update of wikidata tag into the previous tag change
-             context.overwrite(
-               function actionUpdateWikidataTags(graph) {
-                 actions.forEach(function(action) {
-                   graph = action(graph);
-                 });
-                 return graph;
-               },
-               context.history().undoAnnotation()
-             );

 
 

-             // do not dispatch.call('change') here, because entity_editor
-             // changeTags() is not intended to be called asynchronously
-           });
+           if (!onInput) {
+             context.validator().validate();
+           }

          }
 
          }
 

+         function revertTags(keys) {
+           var actions = [];

 
 

-         wiki.tags = function (tags) {
-           _tags = tags;
-           updateForTags(tags);
-         };
+           for (var i in _entityIDs) {
+             var entityID = _entityIDs[i];
+             var original = context.graph().base().entities[entityID];
+             var changed = {};

 
 

-         function updateForTags(tags) {
+             for (var j in keys) {
+               var key = keys[j];
+               changed[key] = original ? original.tags[key] : undefined;
+             }

 
 

-           var value = typeof tags[field.key] === 'string' ? tags[field.key] : '';
-           var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
-           var l = m && _dataWikipedia.find(function (d) { return m[1] === d[2]; });
-           var anchor = m && m[3];
+             var entity = context.entity(entityID);
+             var tags = Object.assign({}, entity.tags); // shallow copy

 
 

-           // value in correct format
-           if (l) {
-             utilGetSetValue(_langInput, l[1]);
-             utilGetSetValue(_titleInput, m[2] + (anchor ? ('#' + anchor) : ''));
-             if (anchor) {
-               try {
-                 // Best-effort `anchorencode:` implementation
-                 anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
-               } catch (e) {
-                 anchor = anchor.replace(/ /g, '_');
+             for (var k in changed) {
+               if (!k) continue;
+               var v = changed[k];
+
+               if (v !== undefined || tags.hasOwnProperty(k)) {
+                 tags[k] = v;

                }
              }
                }
              }

-             _wikiURL = 'https://' + m[1] + '.wikipedia.org/wiki/' +
-               m[2].replace(/ /g, '_') + (anchor ? ('#' + anchor) : '');

 
 

-           // unrecognized value format
-           } else {
-             utilGetSetValue(_titleInput, value);
-             if (value && value !== '') {
-               utilGetSetValue(_langInput, '');
-               _wikiURL = "https://en.wikipedia.org/wiki/Special:Search?search=" + value;
+             tags = utilCleanTags(tags);
+
+             if (!fastDeepEqual(entity.tags, tags)) {
+               actions.push(actionChangeTags(entityID, tags));
+             }
+           }
+
+           if (actions.length) {
+             var combinedAction = function combinedAction(graph) {
+               actions.forEach(function (action) {
+                 graph = action(graph);
+               });
+               return graph;
+             };
+
+             var annotation = _t('operations.change_tags.annotation');
+
+             if (_coalesceChanges) {
+               context.overwrite(combinedAction, annotation);

              } else {
              } else {

-               _wikiURL = '';
+               context.perform(combinedAction, annotation);
+               _coalesceChanges = false;

              }
            }
              }
            }

+
+           context.validator().validate();

          }
 
          }
 

+         entityEditor.modified = function (val) {
+           if (!arguments.length) return _modified;
+           _modified = val;
+           return entityEditor;
+         };

 
 

-         wiki.entityIDs = function (val) {
-           if (!arguments$1.length) { return _entityIDs; }
-           _entityIDs = val;
-           return wiki;
+         entityEditor.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return entityEditor;

          };
 
          };
 

+         entityEditor.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs; // always reload these even if the entityIDs are unchanged, since we
+           // could be reselecting after something like dragging a node

 
 

-         wiki.focus = function () {
-           _titleInput.node().focus();
-         };
+           _base = context.graph();
+           _coalesceChanges = false;
+           if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) return entityEditor; // exit early if no change

 
 

+           _entityIDs = val;
+           loadActivePresets(true);
+           return entityEditor.modified(false);
+         };

 
 

-         return utilRebind(wiki, dispatch$1, 'on');
-       }
+         entityEditor.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return entityEditor;
+         };

 
 

-       uiFieldWikipedia.supportsMultiselection = false;
+         function loadActivePresets(isForNewSelection) {
+           var graph = context.graph();
+           var counts = {};

 
 

-       var uiFields = {
-           access: uiFieldAccess,
-           address: uiFieldAddress,
-           check: uiFieldCheck,
-           combo: uiFieldCombo,
-           cycleway: uiFieldCycleway,
-           defaultCheck: uiFieldCheck,
-           email: uiFieldText,
-           identifier: uiFieldText,
-           lanes: uiFieldLanes,
-           localized: uiFieldLocalized,
-           maxspeed: uiFieldMaxspeed,
-           multiCombo: uiFieldCombo,
-           networkCombo: uiFieldCombo,
-           number: uiFieldText,
-           onewayCheck: uiFieldCheck,
-           radio: uiFieldRadio,
-           restrictions: uiFieldRestrictions,
-           semiCombo: uiFieldCombo,
-           structureRadio: uiFieldRadio,
-           tel: uiFieldText,
-           text: uiFieldText,
-           textarea: uiFieldTextarea,
-           typeCombo: uiFieldCombo,
-           url: uiFieldText,
-           wikidata: uiFieldWikidata,
-           wikipedia: uiFieldWikipedia
-       };
+           for (var i in _entityIDs) {
+             var entity = graph.hasEntity(_entityIDs[i]);
+             if (!entity) return;
+             var match = _mainPresetIndex.match(entity, graph);
+             if (!counts[match.id]) counts[match.id] = 0;
+             counts[match.id] += 1;
+           }

 
 

-       function uiField(context, presetField, entityIDs, options) {
-           options = Object.assign({
-               show: true,
-               wrap: true,
-               remove: true,
-               revert: true,
-               info: true
-           }, options);
+           var matches = Object.keys(counts).sort(function (p1, p2) {
+             return counts[p2] - counts[p1];
+           }).map(function (pID) {
+             return _mainPresetIndex.item(pID);
+           });

 
 

-           var dispatch$1 = dispatch('change', 'revert');
-           var field = Object.assign({}, presetField);   // shallow copy
-           field.domId = utilUniqueDomId('form-field-' + field.safeid);
-           var _show = options.show;
-           var _state = '';
-           var _tags = {};
+           if (!isForNewSelection) {
+             // A "weak" preset doesn't set any tags. (e.g. "Address")
+             var weakPreset = _activePresets.length === 1 && !_activePresets[0].isFallback() && Object.keys(_activePresets[0].addTags || {}).length === 0; // Don't replace a weak preset with a fallback preset (e.g. "Point")

 
 

-           var _locked = false;
-           var _lockedTip = uiTooltip()
-               .title(_t('inspector.lock.suggestion', { label: field.label }))
-               .placement('bottom');
+             if (weakPreset && matches.length === 1 && matches[0].isFallback()) return;
+           }

 
 

+           entityEditor.presets(matches);
+         }

 
 

-           field.keys = field.keys || [field.key];
+         entityEditor.presets = function (val) {
+           if (!arguments.length) return _activePresets; // don't reload the same preset

 
 

-           // only create the fields that are actually being shown
-           if (_show && !field.impl) {
-               createField();
+           if (!utilArrayIdentical(val, _activePresets)) {
+             _activePresets = val;

            }
 
            }
 

-           // Creates the field.. This is done lazily,
-           // once we know that the field will be shown.
-           function createField() {
-               field.impl = uiFields[field.type](field, context)
-                   .on('change', function(t, onInput) {
-                       dispatch$1.call('change', field, t, onInput);
-                   });
+           return entityEditor;
+         };

 
 

-               if (entityIDs) {
-                   field.entityIDs = entityIDs;
-                   // if this field cares about the entities, pass them along
-                   if (field.impl.entityIDs) {
-                       field.impl.entityIDs(entityIDs);
-                   }
-               }
+         return utilRebind(entityEditor, dispatch, 'on');
+       }
+
+       function uiPresetList(context) {
+         var dispatch = dispatch$8('cancel', 'choose');
+
+         var _entityIDs;
+
+         var _currLoc;
+
+         var _currentPresets;
+
+         var _autofocus = false;
+
+         function presetList(selection) {
+           if (!_entityIDs) return;
+           var presets = _mainPresetIndex.matchAllGeometry(entityGeometries());
+           selection.html('');
+           var messagewrap = selection.append('div').attr('class', 'header fillL');
+           var message = messagewrap.append('h3').html(_t.html('inspector.choose'));
+           messagewrap.append('button').attr('class', 'preset-choose').on('click', function () {
+             dispatch.call('cancel', this);
+           }).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'));
+
+           function initialKeydown(d3_event) {
+             // hack to let delete shortcut work when search is autofocused
+             if (search.property('value').length === 0 && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               operationDelete(context, _entityIDs)(); // hack to let undo work when search is autofocused
+             } else if (search.property('value').length === 0 && (d3_event.ctrlKey || d3_event.metaKey) && d3_event.keyCode === utilKeybinding.keyCodes.z) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               context.undo();
+             } else if (!d3_event.ctrlKey && !d3_event.metaKey) {
+               // don't check for delete/undo hack on future keydown events
+               select(this).on('keydown', keydown);
+               keydown.call(this, d3_event);
+             }

            }
 
            }
 

+           function keydown(d3_event) {
+             // down arrow
+             if (d3_event.keyCode === utilKeybinding.keyCodes['↓'] && // if insertion point is at the end of the string
+             search.node().selectionStart === search.property('value').length) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation(); // move focus to the first item in the preset list

 
 

-           function isModified() {
-               if (!entityIDs || !entityIDs.length) { return false; }
-               return entityIDs.some(function(entityID) {
-                   var original = context.graph().base().entities[entityID];
-                   var latest = context.graph().entity(entityID);
-                   return field.keys.some(function(key) {
-                       return original ? latest.tags[key] !== original.tags[key] : latest.tags[key];
-                   });
-               });
+               var buttons = list.selectAll('.preset-list-button');
+               if (!buttons.empty()) buttons.nodes()[0].focus();
+             }

            }
 
            }
 

+           function keypress(d3_event) {
+             // enter
+             var value = search.property('value');

 
 

-           function tagsContainFieldKey() {
-               return field.keys.some(function(key) {
-                   if (field.type === 'multiCombo') {
-                       for (var tagKey in _tags) {
-                           if (tagKey.indexOf(key) === 0) {
-                               return true;
-                           }
-                       }
-                       return false;
-                   }
-                   return _tags[key] !== undefined;
+             if (d3_event.keyCode === 13 && // ↩ Return
+             value.length) {
+               list.selectAll('.preset-list-item:first-child').each(function (d) {
+                 d.choose.call(this);

                });
                });

+             }

            }
 
            }
 

+           function inputevent() {
+             var value = search.property('value');
+             list.classed('filtered', value.length);
+             var results, messageText;

 
 

-           function revert(d) {
-               event.stopPropagation();
-               event.preventDefault();
-               if (!entityIDs || _locked) { return; }
+             if (value.length) {
+               results = presets.search(value, entityGeometries()[0], _currLoc);
+               messageText = _t('inspector.results', {
+                 n: results.collection.length,
+                 search: value
+               });
+             } else {
+               results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro(), _currLoc);
+               messageText = _t('inspector.choose');
+             }

 
 

-               dispatch$1.call('revert', d, d.keys);
+             list.call(drawList, results);
+             message.html(messageText);

            }
 
            }
 

+           var searchWrap = selection.append('div').attr('class', 'search-header');
+           searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
+           var search = searchWrap.append('input').attr('class', 'preset-search-input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keydown', initialKeydown).on('keypress', keypress).on('input', debounce(inputevent));

 
 

-           function remove(d) {
-               event.stopPropagation();
-               event.preventDefault();
-               if (_locked) { return; }
+           if (_autofocus) {
+             search.node().focus(); // Safari 14 doesn't always like to focus immediately,
+             // so try again on the next pass

 
 

-               var t = {};
-               d.keys.forEach(function(key) {
-                   t[key] = undefined;
-               });
-
-               dispatch$1.call('change', d, t);
+             setTimeout(function () {
+               search.node().focus();
+             }, 0);

            }
 
            }
 

+           var listWrap = selection.append('div').attr('class', 'inspector-body');
+           var list = listWrap.append('div').attr('class', 'preset-list').call(drawList, _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro(), _currLoc));
+           context.features().on('change.preset-list', updateForFeatureHiddenState);
+         }

 
 

-           field.render = function(selection) {
-               var container = selection.selectAll('.form-field')
-                   .data([field]);
-
-               // Enter
-               var enter = container.enter()
-                   .append('div')
-                   .attr('class', function(d) { return 'form-field form-field-' + d.safeid; })
-                   .classed('nowrap', !options.wrap);
-
-               if (options.wrap) {
-                   var labelEnter = enter
-                       .append('label')
-                       .attr('class', 'field-label')
-                       .attr('for', function(d) { return d.domId; });
-
-                   var textEnter = labelEnter
-                       .append('span')
-                       .attr('class', 'label-text');
-
-                   textEnter
-                       .append('span')
-                       .attr('class', 'label-textvalue')
-                       .text(function(d) { return d.label(); });
-
-                   textEnter
-                       .append('span')
-                       .attr('class', 'label-textannotation');
-
-                   if (options.remove) {
-                       labelEnter
-                           .append('button')
-                           .attr('class', 'remove-icon')
-                           .attr('title', _t('icons.remove'))
-                           .attr('tabindex', -1)
-                           .call(svgIcon('#iD-operation-delete'));
-                   }
+         function drawList(list, presets) {
+           presets = presets.matchAllGeometry(entityGeometries());
+           var collection = presets.collection.reduce(function (collection, preset) {
+             if (!preset) return collection;

 
 

-                   if (options.revert) {
-                       labelEnter
-                           .append('button')
-                           .attr('class', 'modified-icon')
-                           .attr('title', _t('icons.undo'))
-                           .attr('tabindex', -1)
-                           .call(svgIcon((_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-redo' : '#iD-icon-undo'));
-                   }
+             if (preset.members) {
+               if (preset.members.collection.filter(function (preset) {
+                 return preset.addable();
+               }).length > 1) {
+                 collection.push(CategoryItem(preset));

                }
                }

+             } else if (preset.addable()) {
+               collection.push(PresetItem(preset));
+             }

 
 

+             return collection;
+           }, []);
+           var items = list.selectAll('.preset-list-item').data(collection, function (d) {
+             return d.preset.id;
+           });
+           items.order();
+           items.exit().remove();
+           items.enter().append('div').attr('class', function (item) {
+             return 'preset-list-item preset-' + item.preset.id.replace('/', '-');
+           }).classed('current', function (item) {
+             return _currentPresets.indexOf(item.preset) !== -1;
+           }).each(function (item) {
+             select(this).call(item);
+           }).style('opacity', 0).transition().style('opacity', 1);
+           updateForFeatureHiddenState();
+         }
+
+         function itemKeydown(d3_event) {
+           // the actively focused item
+           var item = select(this.closest('.preset-list-item'));
+           var parentItem = select(item.node().parentNode.closest('.preset-list-item')); // arrow down, move focus to the next, lower item
+
+           if (d3_event.keyCode === utilKeybinding.keyCodes['↓']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation(); // the next item in the list at the same level
+
+             var nextItem = select(item.node().nextElementSibling); // if there is no next item in this list
+
+             if (nextItem.empty()) {
+               // if there is a parent item
+               if (!parentItem.empty()) {
+                 // the item is the last item of a sublist,
+                 // select the next item at the parent level
+                 nextItem = select(parentItem.node().nextElementSibling);
+               } // if the focused item is expanded
+
+             } else if (select(this).classed('expanded')) {
+               // select the first subitem instead
+               nextItem = item.select('.subgrid .preset-list-item:first-child');
+             }

 
 

-               // Update
-               container = container
-                   .merge(enter);
+             if (!nextItem.empty()) {
+               // focus on the next item
+               nextItem.select('.preset-list-button').node().focus();
+             } // arrow up, move focus to the previous, higher item

 
 

-               container.select('.field-label > .remove-icon')  // propagate bound data
-                   .on('click', remove);
+           } else if (d3_event.keyCode === utilKeybinding.keyCodes['↑']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation(); // the previous item in the list at the same level

 
 

-               container.select('.field-label > .modified-icon')  // propagate bound data
-                   .on('click', revert);
+             var previousItem = select(item.node().previousElementSibling); // if there is no previous item in this list

 
 

-               container
-                   .each(function(d) {
-                       var selection = select(this);
+             if (previousItem.empty()) {
+               // if there is a parent item
+               if (!parentItem.empty()) {
+                 // the item is the first subitem of a sublist select the parent item
+                 previousItem = parentItem;
+               } // if the previous item is expanded

 
 

-                       if (!d.impl) {
-                           createField();
-                       }
+             } else if (previousItem.select('.preset-list-button').classed('expanded')) {
+               // select the last subitem of the sublist of the previous item
+               previousItem = previousItem.select('.subgrid .preset-list-item:last-child');
+             }

 
 

-                       var reference, help;
+             if (!previousItem.empty()) {
+               // focus on the previous item
+               previousItem.select('.preset-list-button').node().focus();
+             } else {
+               // the focus is at the top of the list, move focus back to the search field
+               var search = select(this.closest('.preset-list-pane')).select('.preset-search-input');
+               search.node().focus();
+             } // arrow left, move focus to the parent item if there is one

 
 

-                       // instantiate field help
-                       if (options.wrap && field.type === 'restrictions') {
-                           help = uiFieldHelp(context, 'restrictions');
-                       }
+           } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation(); // if there is a parent item, focus on the parent item

 
 

-                       // instantiate tag reference
-                       if (options.wrap && options.info) {
-                           var referenceKey = d.key;
-                           if (d.type === 'multiCombo') {   // lookup key without the trailing ':'
-                               referenceKey = referenceKey.replace(/:$/, '');
-                           }
+             if (!parentItem.empty()) {
+               parentItem.select('.preset-list-button').node().focus();
+             } // arrow right, choose this item

 
 

-                           reference = uiTagReference(d.reference || { key: referenceKey });
-                           if (_state === 'hover') {
-                               reference.showing(false);
-                           }
-                       }
+           } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+             item.datum().choose.call(select(this).node());
+           }
+         }

 
 

-                       selection
-                           .call(d.impl);
+         function CategoryItem(preset) {
+           var box,
+               sublist,
+               shown = false;

 
 

-                       // add field help components
-                       if (help) {
-                           selection
-                               .call(help.body)
-                               .select('.field-label')
-                               .call(help.button);
-                       }
+           function item(selection) {
+             var wrap = selection.append('div').attr('class', 'preset-list-button-wrap category');

 
 

-                       // add tag reference components
-                       if (reference) {
-                           selection
-                               .call(reference.body)
-                               .select('.field-label')
-                               .call(reference.button);
-                       }
+             function click() {
+               var isExpanded = select(this).classed('expanded');
+               var iconName = isExpanded ? _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward' : '#iD-icon-down';
+               select(this).classed('expanded', !isExpanded);
+               select(this).selectAll('div.label-inner svg.icon use').attr('href', iconName);
+               item.choose();
+             }

 
 

-                       d.impl.tags(_tags);
-                   });
+             var geometries = entityGeometries();
+             var button = wrap.append('button').attr('class', 'preset-list-button').classed('expanded', false).call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', click).on('keydown', function (d3_event) {
+               // right arrow, expand the focused item
+               if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
+                 d3_event.preventDefault();
+                 d3_event.stopPropagation(); // if the item isn't expanded
+
+                 if (!select(this).classed('expanded')) {
+                   // toggle expansion (expand the item)
+                   click.call(this, d3_event);
+                 } // left arrow, collapse the focused item
+
+               } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
+                 d3_event.preventDefault();
+                 d3_event.stopPropagation(); // if the item is expanded
+
+                 if (select(this).classed('expanded')) {
+                   // toggle expansion (collapse the item)
+                   click.call(this, d3_event);
+                 }
+               } else {
+                 itemKeydown.call(this, d3_event);
+               }
+             });
+             var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+             label.append('div').attr('class', 'namepart').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline')).append('span').html(function () {
+               return preset.nameLabel() + '&hellip;';
+             });
+             box = selection.append('div').attr('class', 'subgrid').style('max-height', '0px').style('opacity', 0);
+             box.append('div').attr('class', 'arrow');
+             sublist = box.append('div').attr('class', 'preset-list fillL3');
+           }
+
+           item.choose = function () {
+             if (!box || !sublist) return;
+
+             if (shown) {
+               shown = false;
+               box.transition().duration(200).style('opacity', '0').style('max-height', '0px').style('padding-bottom', '0px');
+             } else {
+               shown = true;
+               var members = preset.members.matchAllGeometry(entityGeometries());
+               sublist.call(drawList, members);
+               box.transition().duration(200).style('opacity', '1').style('max-height', 200 + members.collection.length * 190 + 'px').style('padding-bottom', '10px');
+             }
+           };

 
 

+           item.preset = preset;
+           return item;
+         }

 
 

-                   container
-                       .classed('locked', _locked)
-                       .classed('modified', isModified())
-                       .classed('present', tagsContainFieldKey());
+         function PresetItem(preset) {
+           function item(selection) {
+             var wrap = selection.append('div').attr('class', 'preset-list-button-wrap');
+             var geometries = entityGeometries();
+             var button = wrap.append('button').attr('class', 'preset-list-button').call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', item.choose).on('keydown', itemKeydown);
+             var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+             var nameparts = [preset.nameLabel(), preset.subtitleLabel()].filter(Boolean);
+             label.selectAll('.namepart').data(nameparts).enter().append('div').attr('class', 'namepart').html(function (d) {
+               return d;
+             });
+             wrap.call(item.reference.button);
+             selection.call(item.reference.body);
+           }

 
 

+           item.choose = function () {
+             if (select(this).classed('disabled')) return;

 
 

-                   // show a tip and lock icon if the field is locked
-                   var annotation = container.selectAll('.field-label .label-textannotation');
-                   var icon = annotation.selectAll('.icon')
-                       .data(_locked ? [0]: []);
+             if (!context.inIntro()) {
+               _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
+             }

 
 

-                   icon.exit()
-                       .remove();
+             context.perform(function (graph) {
+               for (var i in _entityIDs) {
+                 var entityID = _entityIDs[i];
+                 var oldPreset = _mainPresetIndex.match(graph.entity(entityID), graph);
+                 graph = actionChangePreset(entityID, oldPreset, preset)(graph);
+               }

 
 

-                   icon.enter()
-                       .append('svg')
-                       .attr('class', 'icon')
-                       .append('use')
-                       .attr('xlink:href', '#fas-lock');
+               return graph;
+             }, _t('operations.change_tags.annotation'));
+             context.validator().validate(); // rerun validation

 
 

-                   container.call(_locked ? _lockedTip : _lockedTip.destroy);
+             dispatch.call('choose', this, preset);

            };
 
            };
 

-
-           field.state = function(val) {
-               if (!arguments.length) { return _state; }
-               _state = val;
-               return field;
+           item.help = function (d3_event) {
+             d3_event.stopPropagation();
+             item.reference.toggle();

            };
 
            };
 

+           item.preset = preset;
+           item.reference = uiTagReference(preset.reference());
+           return item;
+         }

 
 

-           field.tags = function(val) {
-               if (!arguments.length) { return _tags; }
-               _tags = val;
+         function updateForFeatureHiddenState() {
+           if (!_entityIDs.every(context.hasEntity)) return;
+           var geometries = entityGeometries();
+           var button = context.container().selectAll('.preset-list .preset-list-button'); // remove existing tooltips

 
 

-               if (tagsContainFieldKey() && !_show) {
-                   // always show a field if it has a value to display
-                   _show = true;
-                   if (!field.impl) {
-                       createField();
-                   }
-               }
+           button.call(uiTooltip().destroyAny);
+           button.each(function (item, index) {
+             var hiddenPresetFeaturesId;

 
 

-               return field;
-           };
+             for (var i in geometries) {
+               hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
+               if (hiddenPresetFeaturesId) break;
+             }

 
 

+             var isHiddenPreset = !context.inIntro() && !!hiddenPresetFeaturesId && (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
+             select(this).classed('disabled', isHiddenPreset);

 
 

-           field.locked = function(val) {
-               if (!arguments.length) { return _locked; }
-               _locked = val;
-               return field;
-           };
+             if (isHiddenPreset) {
+               var isAutoHidden = context.features().autoHidden(hiddenPresetFeaturesId);
+               select(this).call(uiTooltip().title(_t.html('inspector.hidden_preset.' + (isAutoHidden ? 'zoom' : 'manual'), {
+                 features: _t.html('feature.' + hiddenPresetFeaturesId + '.description')
+               })).placement(index < 2 ? 'bottom' : 'top'));
+             }
+           });
+         }

 
 

+         presetList.autofocus = function (val) {
+           if (!arguments.length) return _autofocus;
+           _autofocus = val;
+           return presetList;
+         };

 
 

-           field.show = function() {
-               _show = true;
-               if (!field.impl) {
-                   createField();
-               }
-               if (field.default && field.key && _tags[field.key] !== field.default) {
-                   var t = {};
-                   t[field.key] = field.default;
-                   dispatch$1.call('change', this, t);
-               }
-           };
+         presetList.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _currLoc = null;

 
 

-           // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown
-           field.isShown = function() {
-               return _show;
-           };
+           if (_entityIDs && _entityIDs.length) {
+             // calculate current location
+             var extent = _entityIDs.reduce(function (extent, entityID) {
+               var entity = context.graph().entity(entityID);
+               return extent.extend(entity.extent(context.graph()));
+             }, geoExtent());

 
 

+             _currLoc = extent.center(); // match presets

 
 

-           // An allowed field can appear in the UI or in the 'Add field' dropdown.
-           // A non-allowed field is hidden from the user altogether
-           field.isAllowed = function() {
+             var presets = _entityIDs.map(function (entityID) {
+               return _mainPresetIndex.match(context.entity(entityID), context.graph());
+             });

 
 

-               if (entityIDs &&
-                   entityIDs.length > 1 &&
-                   uiFields[field.type].supportsMultiselection === false) { return false; }
+             presetList.presets(presets);
+           }

 
 

-               if (field.geometry && !entityIDs.every(function(entityID) {
-                   return field.matchGeometry(context.graph().geometry(entityID));
-               })) { return false; }
+           return presetList;
+         };

 
 

-               if (field.countryCodes || field.notCountryCodes) {
-                   var extent = combinedEntityExtent();
-                   if (!extent) { return true; }
+         presetList.presets = function (val) {
+           if (!arguments.length) return _currentPresets;
+           _currentPresets = val;
+           return presetList;
+         };

 
 

-                   var center = extent.center();
-                   var countryCode = iso1A2Code(center);
+         function entityGeometries() {
+           var counts = {};

 
 

-                   if (!countryCode) { return false; }
+           for (var i in _entityIDs) {
+             var entityID = _entityIDs[i];
+             var entity = context.entity(entityID);
+             var geometry = entity.geometry(context.graph()); // Treat entities on addr:interpolation lines as points, not vertices (#3241)

 
 

-                   countryCode = countryCode.toLowerCase();
+             if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
+               geometry = 'point';
+             }

 
 

-                   if (field.countryCodes && field.countryCodes.indexOf(countryCode) === -1) {
-                       return false;
-                   }
-                   if (field.notCountryCodes && field.notCountryCodes.indexOf(countryCode) !== -1) {
-                       return false;
-                   }
-               }
+             if (!counts[geometry]) counts[geometry] = 0;
+             counts[geometry] += 1;
+           }

 
 

-               var prerequisiteTag = field.prerequisiteTag;
+           return Object.keys(counts).sort(function (geom1, geom2) {
+             return counts[geom2] - counts[geom1];
+           });
+         }

 
 

-               if (entityIDs &&
-                   !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
-                   prerequisiteTag) {
+         return utilRebind(presetList, dispatch, 'on');
+       }

 
 

-                   if (!entityIDs.every(function(entityID) {
-                       var entity = context.graph().entity(entityID);
-                       if (prerequisiteTag.key) {
-                           var value = entity.tags[prerequisiteTag.key];
-                           if (!value) { return false; }
+       function uiViewOnOSM(context) {
+         var _what; // an osmEntity or osmNote

 
 

-                           if (prerequisiteTag.valueNot) {
-                               return prerequisiteTag.valueNot !== value;
-                           }
-                           if (prerequisiteTag.value) {
-                               return prerequisiteTag.value === value;
-                           }
-                       } else if (prerequisiteTag.keyNot) {
-                           if (entity.tags[prerequisiteTag.keyNot]) { return false; }
-                       }
-                       return true;
-                   })) { return false; }
-               }

 
 

-               return true;
-           };
+         function viewOnOSM(selection) {
+           var url;

 
 

+           if (_what instanceof osmEntity) {
+             url = context.connection().entityURL(_what);
+           } else if (_what instanceof osmNote) {
+             url = context.connection().noteURL(_what);
+           }

 
 

-           field.focus = function() {
-               if (field.impl) {
-                   field.impl.focus();
-               }
-           };
+           var data = !_what || _what.isNew() ? [] : [_what];
+           var link = selection.selectAll('.view-on-osm').data(data, function (d) {
+             return d.id;
+           }); // exit

 
 

+           link.exit().remove(); // enter

 
 

-           function combinedEntityExtent() {
-               return entityIDs && entityIDs.length && entityIDs.reduce(function(extent, entityID) {
-                   var entity = context.graph().entity(entityID);
-                   return extent.extend(entity.extent(context.graph()));
-               }, geoExtent());
-           }
+           var linkEnter = link.enter().append('a').attr('class', 'view-on-osm').attr('target', '_blank').attr('href', url).call(svgIcon('#iD-icon-out-link', 'inline'));
+           linkEnter.append('span').html(_t.html('inspector.view_on_osm'));
+         }

 
 

+         viewOnOSM.what = function (_) {
+           if (!arguments.length) return _what;
+           _what = _;
+           return viewOnOSM;
+         };

 
 

-           return utilRebind(field, dispatch$1, 'on');
+         return viewOnOSM;

        }
 
        }
 

-       function uiFormFields(context) {
-           var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
-           var _fieldsArr = [];
-           var _lastPlaceholder = '';
-           var _state = '';
-           var _klass = '';
+       function uiInspector(context) {
+         var presetList = uiPresetList(context);
+         var entityEditor = uiEntityEditor(context);
+         var wrap = select(null),
+             presetPane = select(null),
+             editorPane = select(null);
+         var _state = 'select';

 
 

+         var _entityIDs;

 
 

-           function formFields(selection) {
-               var allowedFields = _fieldsArr.filter(function(field) { return field.isAllowed(); });
-               var shown = allowedFields.filter(function(field) { return field.isShown(); });
-               var notShown = allowedFields.filter(function(field) { return !field.isShown(); });
+         var _newFeature = false;

 
 

-               var container = selection.selectAll('.form-fields-container')
-                   .data([0]);
+         function inspector(selection) {
+           presetList.entityIDs(_entityIDs).autofocus(_newFeature).on('choose', inspector.setPreset).on('cancel', function () {
+             inspector.setPreset();
+           });
+           entityEditor.state(_state).entityIDs(_entityIDs).on('choose', inspector.showList);
+           wrap = selection.selectAll('.panewrap').data([0]);
+           var enter = wrap.enter().append('div').attr('class', 'panewrap');
+           enter.append('div').attr('class', 'preset-list-pane pane');
+           enter.append('div').attr('class', 'entity-editor-pane pane');
+           wrap = wrap.merge(enter);
+           presetPane = wrap.selectAll('.preset-list-pane');
+           editorPane = wrap.selectAll('.entity-editor-pane');

 
 

-               container = container.enter()
-                   .append('div')
-                   .attr('class', 'form-fields-container ' + (_klass || ''))
-                   .merge(container);
+           function shouldDefaultToPresetList() {
+             // always show the inspector on hover
+             if (_state !== 'select') return false; // can only change preset on single selection

 
 

+             if (_entityIDs.length !== 1) return false;
+             var entityID = _entityIDs[0];
+             var entity = context.hasEntity(entityID);
+             if (!entity) return false; // default to inspector if there are already tags

 
 

-               var fields = container.selectAll('.wrap-form-field')
-                   .data(shown, function(d) { return d.id + (d.entityIDs ? d.entityIDs.join() : ''); });
+             if (entity.hasNonGeometryTags()) return false; // prompt to select preset if feature is new and untagged

 
 

-               fields.exit()
-                   .remove();
+             if (_newFeature) return true; // all existing features except vertices should default to inspector

 
 

-               // Enter
-               var enter = fields.enter()
-                   .append('div')
-                   .attr('class', function(d) { return 'wrap-form-field wrap-form-field-' + d.safeid; });
+             if (entity.geometry(context.graph()) !== 'vertex') return false; // show vertex relations if any

 
 

-               // Update
-               fields = fields
-                   .merge(enter);
+             if (context.graph().parentRelations(entity).length) return false; // show vertex issues if there are any

 
 

-               fields
-                   .order()
-                   .each(function(d) {
-                       select(this)
-                           .call(d.render);
-                   });
+             if (context.validator().getEntityIssues(entityID).length) return false; // show turn retriction editor for junction vertices

 
 

+             if (entity.isHighwayIntersection(context.graph())) return false; // otherwise show preset list for uninteresting vertices

 
 

-               var titles = [];
-               var moreFields = notShown.map(function(field) {
-                   var label = field.label();
-                   titles.push(label);
+             return true;
+           }

 
 

-                   var terms = field.terms();
-                   if (field.key) { terms.push(field.key); }
-                   if (field.keys) { terms = terms.concat(field.keys); }
+           if (shouldDefaultToPresetList()) {
+             wrap.style('right', '-100%');
+             editorPane.classed('hide', true);
+             presetPane.classed('hide', false).call(presetList);
+           } else {
+             wrap.style('right', '0%');
+             presetPane.classed('hide', true);
+             editorPane.classed('hide', false).call(entityEditor);
+           }

 
 

-                   return {
-                       title: label,
-                       value: label,
-                       field: field,
-                       terms: terms
-                   };
-               });
+           var footer = selection.selectAll('.footer').data([0]);
+           footer = footer.enter().append('div').attr('class', 'footer').merge(footer);
+           footer.call(uiViewOnOSM(context).what(context.hasEntity(_entityIDs.length === 1 && _entityIDs[0])));
+         }

 
 

-               var placeholder = titles.slice(0,3).join(', ') + ((titles.length > 3) ? '…' : '');
+         inspector.showList = function (presets) {
+           presetPane.classed('hide', false);
+           wrap.transition().styleTween('right', function () {
+             return interpolate$1('0%', '-100%');
+           }).on('end', function () {
+             editorPane.classed('hide', true);
+           });

 
 

+           if (presets) {
+             presetList.presets(presets);
+           }

 
 

-               var more = selection.selectAll('.more-fields')
-                   .data((_state === 'hover' || moreFields.length === 0) ? [] : [0]);
+           presetPane.call(presetList.autofocus(true));
+         };

 
 

-               more.exit()
-                   .remove();
+         inspector.setPreset = function (preset) {
+           // upon setting multipolygon, go to the area preset list instead of the editor
+           if (preset && preset.id === 'type/multipolygon') {
+             presetPane.call(presetList.autofocus(true));
+           } else {
+             editorPane.classed('hide', false);
+             wrap.transition().styleTween('right', function () {
+               return interpolate$1('-100%', '0%');
+             }).on('end', function () {
+               presetPane.classed('hide', true);
+             });

 
 

-               var moreEnter = more.enter()
-                   .append('div')
-                   .attr('class', 'more-fields')
-                   .append('label');
-
-               moreEnter
-                   .append('span')
-                   .text(_t('inspector.add_fields'));
-
-               more = moreEnter
-                   .merge(more);
-
-
-               var input = more.selectAll('.value')
-                   .data([0]);
-
-               input.exit()
-                   .remove();
-
-               input = input.enter()
-                   .append('input')
-                   .attr('class', 'value')
-                   .attr('type', 'text')
-                   .attr('placeholder', placeholder)
-                   .call(utilNoAuto)
-                   .merge(input);
-
-               input
-                   .call(utilGetSetValue, '')
-                   .call(moreCombo
-                       .data(moreFields)
-                       .on('accept', function (d) {
-                           if (!d) { return; }  // user entered something that was not matched
-                           var field = d.field;
-                           field.show();
-                           selection.call(formFields);  // rerender
-                           if (field.type !== 'semiCombo' && field.type !== 'multiCombo') {
-                               field.focus();
-                           }
-                       })
-                   );
+             if (preset) {
+               entityEditor.presets([preset]);
+             }

 
 

-               // avoid updating placeholder excessively (triggers style recalc)
-               if (_lastPlaceholder !== placeholder) {
-                   input.attr('placeholder', placeholder);
-                   _lastPlaceholder = placeholder;
-               }
+             editorPane.call(entityEditor);

            }
            }

+         };

 
 

+         inspector.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           entityEditor.state(_state); // remove any old field help overlay that might have gotten attached to the inspector

 
 

-           formFields.fieldsArr = function(val) {
-               if (!arguments.length) { return _fieldsArr; }
-               _fieldsArr = val || [];
-               return formFields;
-           };
-
-           formFields.state = function(val) {
-               if (!arguments.length) { return _state; }
-               _state = val;
-               return formFields;
-           };
+           context.container().selectAll('.field-help-body').remove();
+           return inspector;
+         };

 
 

-           formFields.klass = function(val) {
-               if (!arguments.length) { return _klass; }
-               _klass = val;
-               return formFields;
-           };
+         inspector.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return inspector;
+         };

 
 

+         inspector.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return inspector;
+         };

 
 

-           return formFields;
+         return inspector;

        }
 
        }
 

-       function uiSectionPresetFields(context) {
+       function uiImproveOsmComments() {
+         var _qaItem;

 
 

-           var section = uiSection('preset-fields', context)
-               .title(function() {
-                   return _t('inspector.fields');
-               })
-               .disclosureContent(renderDisclosureContent);
+         function issueComments(selection) {
+           // make the div immediately so it appears above the buttons
+           var comments = selection.selectAll('.comments-container').data([0]);
+           comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments); // must retrieve comments from API before they can be displayed

 
 

-           var dispatch$1 = dispatch('change', 'revert');
-           var formFields = uiFormFields(context);
-           var _state;
-           var _fieldsArr;
-           var _presets = [];
-           var _tags;
-           var _entityIDs;
+           services.improveOSM.getComments(_qaItem).then(function (d) {
+             if (!d.comments) return; // nothing to do here

 
 

-           function renderDisclosureContent(selection) {
-               if (!_fieldsArr) {
+             var commentEnter = comments.selectAll('.comment').data(d.comments).enter().append('div').attr('class', 'comment');
+             commentEnter.append('div').attr('class', 'comment-avatar').call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+             var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
+             var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
+             metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
+               var osm = services.osm;
+               var selection = select(this);

 
 

-                   var graph = context.graph();
+               if (osm && d.username) {
+                 selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.username)).attr('target', '_blank');
+               }

 
 

-                   var geometries = Object.keys(_entityIDs.reduce(function(geoms, entityID) {
-                       return geoms[graph.entity(entityID).geometry(graph)] = true;
-                   }, {}));
+               selection.html(function (d) {
+                 return d.username;
+               });
+             });
+             metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
+               return _t.html('note.status.commented', {
+                 when: localeDateString(d.timestamp)
+               });
+             });
+             mainEnter.append('div').attr('class', 'comment-text').append('p').html(function (d) {
+               return d.text;
+             });
+           })["catch"](function (err) {
+             console.log(err); // eslint-disable-line no-console
+           });
+         }

 
 

-                   var presetsManager = _mainPresetIndex;
+         function localeDateString(s) {
+           if (!s) return null;
+           var options = {
+             day: 'numeric',
+             month: 'short',
+             year: 'numeric'
+           };
+           var d = new Date(s * 1000); // timestamp is served in seconds, date takes ms

 
 

-                   var allFields = [];
-                   var allMoreFields = [];
-                   var sharedTotalFields;
+           if (isNaN(d.getTime())) return null;
+           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+         }

 
 

-                   _presets.forEach(function(preset) {
-                       var fields = preset.fields();
-                       var moreFields = preset.moreFields();
+         issueComments.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return issueComments;
+         };

 
 

-                       allFields = utilArrayUnion(allFields, fields);
-                       allMoreFields = utilArrayUnion(allMoreFields, moreFields);
+         return issueComments;
+       }

 
 

-                       if (!sharedTotalFields) {
-                           sharedTotalFields = utilArrayUnion(fields, moreFields);
-                       } else {
-                           sharedTotalFields = sharedTotalFields.filter(function(field) {
-                               return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
-                           });
-                       }
-                   });
+       function uiImproveOsmDetails(context) {
+         var _qaItem;

 
 

-                   var sharedFields = allFields.filter(function(field) {
-                       return sharedTotalFields.indexOf(field) !== -1;
-                   });
-                   var sharedMoreFields = allMoreFields.filter(function(field) {
-                       return sharedTotalFields.indexOf(field) !== -1;
-                   });
+         function issueDetail(d) {
+           if (d.desc) return d.desc;
+           var issueKey = d.issueKey;
+           d.replacements = d.replacements || {};
+           d.replacements["default"] = _t.html('inspector.unknown'); // special key `default` works as a fallback string

 
 

-                   _fieldsArr = [];
+           return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".description"), d.replacements);
+         }

 
 

-                   sharedFields.forEach(function(field) {
-                       if (field.matchAllGeometry(geometries)) {
-                           _fieldsArr.push(
-                               uiField(context, field, _entityIDs)
-                           );
-                       }
-                   });
+         function improveOsmDetails(selection) {
+           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           });
+           details.exit().remove();
+           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description

 
 

-                   var singularEntity = _entityIDs.length === 1 && graph.hasEntity(_entityIDs[0]);
-                   if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
-                       _fieldsArr.push(
-                           uiField(context, presetsManager.field('restrictions'), _entityIDs)
-                       );
-                   }
+           var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+           descriptionEnter.append('h4').html(_t.html('QA.keepRight.detail_description'));
+           descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..

 
 

-                   var additionalFields = utilArrayUnion(sharedMoreFields, presetsManager.universal());
-                   additionalFields.sort(function(field1, field2) {
-                       return field1.label().localeCompare(field2.label(), _mainLocalizer.localeCode());
-                   });
+           var relatedEntities = [];
+           descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
+             var link = select(this);
+             var isObjectLink = link.classed('error_object_link');
+             var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
+             var entity = context.hasEntity(entityID);
+             relatedEntities.push(entityID); // Add click handler

 
 

-                   additionalFields.forEach(function(field) {
-                       if (sharedFields.indexOf(field) === -1 &&
-                           field.matchAllGeometry(geometries)) {
-                           _fieldsArr.push(
-                               uiField(context, field, _entityIDs, { show: false })
-                           );
-                       }
-                   });
+             link.on('mouseenter', function () {
+               utilHighlightEntities([entityID], true, context);
+             }).on('mouseleave', function () {
+               utilHighlightEntities([entityID], false, context);
+             }).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               utilHighlightEntities([entityID], false, context);
+               var osmlayer = context.layers().layer('osm');

 
 

-                   _fieldsArr.forEach(function(field) {
-                       field
-                           .on('change', function(t, onInput) {
-                               dispatch$1.call('change', field, _entityIDs, t, onInput);
-                           })
-                           .on('revert', function(keys) {
-                               dispatch$1.call('revert', field, keys);
-                           });
-                   });
+               if (!osmlayer.enabled()) {
+                 osmlayer.enabled(true);

                }
 
                }
 

-               _fieldsArr.forEach(function(field) {
-                   field
-                       .state(_state)
-                       .tags(_tags);
-               });
-
-
-               selection
-                   .call(formFields
-                       .fieldsArr(_fieldsArr)
-                       .state(_state)
-                       .klass('grouped-items-area')
-                   );
-
+               context.map().centerZoom(_qaItem.loc, 20);

 
 

-               selection.selectAll('.wrap-form-field input')
-                   .on('keydown', function() {
-                       // if user presses enter, and combobox is not active, accept edits..
-                       if (event.keyCode === 13 && context.container().select('.combobox').empty()) {
-                           context.enter(modeBrowse(context));
-                       }
+               if (entity) {
+                 context.enter(modeSelect(context, [entityID]));
+               } else {
+                 context.loadEntity(entityID, function (err, result) {
+                   if (err) return;
+                   var entity = result.data.find(function (e) {
+                     return e.id === entityID;

                    });
                    });

-           }
-
-           section.presets = function(val) {
-               if (!arguments.length) { return _presets; }
-               if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
-                   _presets = val;
-                   _fieldsArr = null;
+                   if (entity) context.enter(modeSelect(context, [entityID]));
+                 });

                }
                }

-               return section;
-           };
+             }); // Replace with friendly name if possible
+             // (The entity may not yet be loaded into the graph)

 
 

-           section.state = function(val) {
-               if (!arguments.length) { return _state; }
-               _state = val;
-               return section;
-           };
+             if (entity) {
+               var name = utilDisplayName(entity); // try to use common name

 
 

-           section.tags = function(val) {
-               if (!arguments.length) { return _tags; }
-               _tags = val;
-               // Don't reset _fieldsArr here.
-               return section;
-           };
+               if (!name && !isObjectLink) {
+                 var preset = _mainPresetIndex.match(entity, context.graph());
+                 name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+               }

 
 

-           section.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
-                   _entityIDs = val;
-                   _fieldsArr = null;
+               if (name) {
+                 this.innerText = name;

                }
                }

-               return section;
-           };
+             }
+           }); // Don't hide entities related to this error - #5880
+
+           context.features().forceVisible(relatedEntities);
+           context.map().pan([0, 0]); // trigger a redraw
+         }
+
+         improveOsmDetails.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return improveOsmDetails;
+         };

 
 

-           return utilRebind(section, dispatch$1, 'on');
+         return improveOsmDetails;

        }
 
        }
 

-       function uiSectionRawMemberEditor(context) {
+       function uiImproveOsmHeader() {
+         var _qaItem;
+
+         function issueTitle(d) {
+           var issueKey = d.issueKey;
+           d.replacements = d.replacements || {};
+           d.replacements["default"] = _t.html('inspector.unknown'); // special key `default` works as a fallback string

 
 

-           var section = uiSection('raw-member-editor', context)
-               .shouldDisplay(function() {
-                   if (!_entityIDs || _entityIDs.length !== 1) { return false; }
+           return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".title"), d.replacements);
+         }

 
 

-                   var entity = context.hasEntity(_entityIDs[0]);
-                   return entity && entity.type === 'relation';
-               })
-               .title(function() {
-                   var entity = context.hasEntity(_entityIDs[0]);
-                   if (!entity) { return ''; }
+         function improveOsmHeader(selection) {
+           var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           });
+           header.exit().remove();
+           var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+           var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+             return d.id < 0;
+           }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
+             return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+           });
+           svgEnter.append('polygon').attr('fill', 'currentColor').attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+           svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
+             var picon = d.icon;

 
 

-                   var gt = entity.members.length > _maxMembers ? '>' : '';
-                   var count = gt + entity.members.slice(0, _maxMembers).length;
-                   return _t('inspector.title_count', { title: _t('inspector.members'), count: count });
-               })
-               .disclosureContent(renderDisclosureContent);
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return "#".concat(picon).concat(isMaki ? '-11' : '');
+             }
+           });
+           headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
+         }
+
+         improveOsmHeader.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return improveOsmHeader;
+         };

 
 

-           var taginfo = services.taginfo;
-           var _entityIDs;
-           var _maxMembers = 1000;
+         return improveOsmHeader;
+       }

 
 

-           function downloadMember(d) {
-               event.preventDefault();
+       function uiImproveOsmEditor(context) {
+         var dispatch = dispatch$8('change');
+         var qaDetails = uiImproveOsmDetails(context);
+         var qaComments = uiImproveOsmComments();
+         var qaHeader = uiImproveOsmHeader();

 
 

-               // display the loading indicator
-               select(this.parentNode).classed('tag-reference-loading', true);
-               context.loadEntity(d.id, function() {
-                   section.reRender();
-               });
-           }
+         var _qaItem;

 
 

-           function zoomToMember(d) {
-               event.preventDefault();
+         function improveOsmEditor(selection) {
+           var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'close').on('click', function () {
+             return context.enter(modeBrowse(context));
+           }).call(svgIcon('#iD-icon-close'));
+           headerEnter.append('h3').html(_t.html('QA.improveOSM.title'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body);
+           var editor = body.selectAll('.qa-editor').data([0]);
+           editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(qaComments.issue(_qaItem)).call(improveOsmSaveSection);
+         }

 
 

-               var entity = context.entity(d.id);
-               context.map().zoomToEase(entity);
+         function improveOsmSaveSection(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();

 
 

-               // highlight the feature in case it wasn't previously on-screen
-               utilHighlightEntities([d.id], true, context);
-           }
+           var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
+           var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           }); // exit

 
 

+           saveSection.exit().remove(); // enter

 
 

-           function selectMember(d) {
-               event.preventDefault();
+           var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
+           saveSectionEnter.append('h4').attr('class', '.qa-save-header').html(_t.html('note.newComment'));
+           saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
+             return d.newComment;
+           }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update

 
 

-               // remove the hover-highlight styling
-               utilHighlightEntities([d.id], false, context);
+           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);

 
 

-               var entity = context.entity(d.id);
-               var mapExtent = context.map().extent();
-               if (!entity.intersects(mapExtent, context.graph())) {
-                   // zoom to the entity if its extent is not visible now
-                   context.map().zoomToEase(entity);
-               }
+           function changeInput() {
+             var input = select(this);
+             var val = input.property('value').trim();

 
 

-               context.enter(modeSelect(context, [d.id]));
-           }
+             if (val === '') {
+               val = undefined;
+             } // store the unsaved comment with the issue itself

 
 
 
 

-           function changeRole(d) {
-               var oldRole = d.role;
-               var newRole = context.cleanRelationRole(select(this).property('value'));
+             _qaItem = _qaItem.update({
+               newComment: val
+             });
+             var qaService = services.improveOSM;

 
 

-               if (oldRole !== newRole) {
-                   var member = { id: d.id, type: d.type, role: newRole };
-                   context.perform(
-                       actionChangeMember(d.relation.id, member, d.index),
-                       _t('operations.change_role.annotation')
-                   );
-               }
+             if (qaService) {
+               qaService.replaceItem(_qaItem);
+             }
+
+             saveSection.call(qaSaveButtons);

            }
            }

+         }

 
 

+         function qaSaveButtons(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();

 
 

-           function deleteMember(d) {
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+             return d.status + d.id;
+           }); // exit

 
 

-               // remove the hover-highlight styling
-               utilHighlightEntities([d.id], false, context);
+           buttonSection.exit().remove(); // enter

 
 

-               context.perform(
-                   actionDeleteMember(d.relation.id, d.index),
-                   _t('operations.delete_member.annotation')
-               );
+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+           buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('QA.keepRight.save_comment'));
+           buttonEnter.append('button').attr('class', 'button close-button action');
+           buttonEnter.append('button').attr('class', 'button ignore-button action'); // update

 
 

-               if (!context.hasEntity(d.relation.id)) {
-                   context.enter(modeBrowse(context));
-               }
-           }
+           buttonSection = buttonSection.merge(buttonEnter);
+           buttonSection.select('.comment-button').attr('disabled', function (d) {
+             return d.newComment ? null : true;
+           }).on('click.comment', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641
+
+             var qaService = services.improveOSM;

 
 

-           function renderDisclosureContent(selection) {
+             if (qaService) {
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
+             }
+           });
+           buttonSection.select('.close-button').html(function (d) {
+             var andComment = d.newComment ? '_comment' : '';
+             return _t.html("QA.keepRight.close".concat(andComment));
+           }).on('click.close', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641

 
 

-               var entityID = _entityIDs[0];
+             var qaService = services.improveOSM;

 
 

-               var memberships = [];
-               var entity = context.entity(entityID);
-               entity.members.slice(0, _maxMembers).forEach(function(member, index) {
-                   memberships.push({
-                       index: index,
-                       id: member.id,
-                       type: member.type,
-                       role: member.role,
-                       relation: entity,
-                       member: context.hasEntity(member.id),
-                       domId: utilUniqueDomId(entityID + '-member-' + index)
-                   });
+             if (qaService) {
+               d.newStatus = 'SOLVED';
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);

                });
                });

+             }
+           });
+           buttonSection.select('.ignore-button').html(function (d) {
+             var andComment = d.newComment ? '_comment' : '';
+             return _t.html("QA.keepRight.ignore".concat(andComment));
+           }).on('click.ignore', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641

 
 

-               var list = selection.selectAll('.member-list')
-                   .data([0]);
+             var qaService = services.improveOSM;

 
 

-               list = list.enter()
-                   .append('ul')
-                   .attr('class', 'member-list')
-                   .merge(list);
+             if (qaService) {
+               d.newStatus = 'INVALID';
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
+             }
+           });
+         } // NOTE: Don't change method name until UI v3 is merged

 
 
 
 

-               var items = list.selectAll('li')
-                   .data(memberships, function(d) {
-                       return osmEntity.key(d.relation) + ',' + d.index + ',' +
-                           (d.member ? osmEntity.key(d.member) : 'incomplete');
-                   });
+         improveOsmEditor.error = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return improveOsmEditor;
+         };

 
 

-               items.exit()
-                   .each(unbind)
-                   .remove();
-
-               var itemsEnter = items.enter()
-                   .append('li')
-                   .attr('class', 'member-row form-field')
-                   .classed('member-incomplete', function(d) { return !d.member; });
-
-               itemsEnter
-                   .each(function(d) {
-                       var item = select(this);
-
-                       var label = item
-                           .append('label')
-                           .attr('class', 'field-label')
-                           .attr('for', d.domId);
-
-                       if (d.member) {
-                           // highlight the member feature in the map while hovering on the list item
-                           item
-                               .on('mouseover', function() {
-                                   utilHighlightEntities([d.id], true, context);
-                               })
-                               .on('mouseout', function() {
-                                   utilHighlightEntities([d.id], false, context);
-                               });
-
-                           var labelLink = label
-                               .append('span')
-                               .attr('class', 'label-text')
-                               .append('a')
-                               .attr('href', '#')
-                               .on('click', selectMember);
-
-                           labelLink
-                               .append('span')
-                               .attr('class', 'member-entity-type')
-                               .text(function(d) {
-                                   var matched = _mainPresetIndex.match(d.member, context.graph());
-                                   return (matched && matched.name()) || utilDisplayType(d.member.id);
-                               });
-
-                           labelLink
-                               .append('span')
-                               .attr('class', 'member-entity-name')
-                               .text(function(d) { return utilDisplayName(d.member); });
-
-                           label
-                               .append('button')
-                               .attr('tabindex', -1)
-                               .attr('title', _t('icons.remove'))
-                               .attr('class', 'remove member-delete')
-                               .call(svgIcon('#iD-operation-delete'));
-
-                           label
-                               .append('button')
-                               .attr('class', 'member-zoom')
-                               .attr('title', _t('icons.zoom_to'))
-                               .call(svgIcon('#iD-icon-framed-dot', 'monochrome'))
-                               .on('click', zoomToMember);
+         return utilRebind(improveOsmEditor, dispatch, 'on');
+       }

 
 

-                       } else {
-                           var labelText = label
-                               .append('span')
-                               .attr('class', 'label-text');
-
-                           labelText
-                               .append('span')
-                               .attr('class', 'member-entity-type')
-                               .text(_t('inspector.' + d.type, { id: d.id }));
-
-                           labelText
-                               .append('span')
-                               .attr('class', 'member-entity-name')
-                               .text(_t('inspector.incomplete', { id: d.id }));
-
-                           label
-                               .append('button')
-                               .attr('class', 'member-download')
-                               .attr('title', _t('icons.download'))
-                               .attr('tabindex', -1)
-                               .call(svgIcon('#iD-icon-load'))
-                               .on('click', downloadMember);
-                       }
-                   });
+       function uiKeepRightDetails(context) {
+         var _qaItem;

 
 

-               var wrapEnter = itemsEnter
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-member');
-
-               wrapEnter
-                   .append('input')
-                   .attr('class', 'member-role')
-                   .attr('id', function(d) {
-                       return d.domId;
-                   })
-                   .property('type', 'text')
-                   .attr('placeholder', _t('inspector.role'))
-                   .call(utilNoAuto);
-
-               if (taginfo) {
-                   wrapEnter.each(bindTypeahead);
-               }
-
-               // update
-               items = items
-                   .merge(itemsEnter)
-                   .order();
-
-               items.select('input.member-role')
-                   .property('value', function(d) { return d.role; })
-                   .on('blur', changeRole)
-                   .on('change', changeRole);
-
-               items.select('button.member-delete')
-                   .on('click', deleteMember);
-
-               var dragOrigin, targetIndex;
-
-               items.call(d3_drag()
-                   .on('start', function() {
-                       dragOrigin = {
-                           x: event.x,
-                           y: event.y
-                       };
-                       targetIndex = null;
-                   })
-                   .on('drag', function(d, index) {
-                       var x = event.x - dragOrigin.x,
-                           y = event.y - dragOrigin.y;
-
-                       if (!select(this).classed('dragging') &&
-                           // don't display drag until dragging beyond a distance threshold
-                           Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) { return; }
-
-                       select(this)
-                           .classed('dragging', true);
-
-                       targetIndex = null;
-
-                       selection.selectAll('li.member-row')
-                           .style('transform', function(d2, index2) {
-                               var node = select(this).node();
-                               if (index === index2) {
-                                   return 'translate(' + x + 'px, ' + y + 'px)';
-                               } else if (index2 > index && event.y > node.offsetTop) {
-                                   if (targetIndex === null || index2 > targetIndex) {
-                                       targetIndex = index2;
-                                   }
-                                   return 'translateY(-100%)';
-                               } else if (index2 < index && event.y < node.offsetTop + node.offsetHeight) {
-                                   if (targetIndex === null || index2 < targetIndex) {
-                                       targetIndex = index2;
-                                   }
-                                   return 'translateY(100%)';
-                               }
-                               return null;
-                           });
-                   })
-                   .on('end', function(d, index) {
+         function issueDetail(d) {
+           var itemType = d.itemType,
+               parentIssueType = d.parentIssueType;
+           var unknown = _t.html('inspector.unknown');
+           var replacements = d.replacements || {};
+           replacements["default"] = unknown; // special key `default` works as a fallback string

 
 

-                       if (!select(this).classed('dragging')) {
-                           return;
-                       }
+           var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);

 
 

-                       select(this)
-                           .classed('dragging', false);
+           if (detail === unknown) {
+             detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
+           }

 
 

-                       selection.selectAll('li.member-row')
-                           .style('transform', null);
+           return detail;
+         }

 
 

-                       if (targetIndex !== null) {
-                           // dragged to a new position, reorder
-                           context.perform(
-                               actionMoveMember(d.relation.id, index, targetIndex),
-                               _t('operations.reorder_members.annotation')
-                           );
-                       }
-                   })
-               );
+         function keepRightDetails(selection) {
+           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           });
+           details.exit().remove();
+           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description

 
 

+           var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+           descriptionEnter.append('h4').html(_t.html('QA.keepRight.detail_description'));
+           descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..

 
 

+           var relatedEntities = [];
+           descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
+             var link = select(this);
+             var isObjectLink = link.classed('error_object_link');
+             var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
+             var entity = context.hasEntity(entityID);
+             relatedEntities.push(entityID); // Add click handler

 
 

-               function bindTypeahead(d) {
-                   var row = select(this);
-                   var role = row.selectAll('input.member-role');
-                   var origValue = role.property('value');
+             link.on('mouseenter', function () {
+               utilHighlightEntities([entityID], true, context);
+             }).on('mouseleave', function () {
+               utilHighlightEntities([entityID], false, context);
+             }).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               utilHighlightEntities([entityID], false, context);
+               var osmlayer = context.layers().layer('osm');

 
 

-                   function sort(value, data) {
-                       var sameletter = [];
-                       var other = [];
-                       for (var i = 0; i < data.length; i++) {
-                           if (data[i].value.substring(0, value.length) === value) {
-                               sameletter.push(data[i]);
-                           } else {
-                               other.push(data[i]);
-                           }
-                       }
-                       return sameletter.concat(other);
-                   }
+               if (!osmlayer.enabled()) {
+                 osmlayer.enabled(true);
+               }

 
 

-                   role.call(uiCombobox(context, 'member-role')
-                       .fetcher(function(role, callback) {
-                           // The `geometry` param is used in the `taginfo.js` interface for
-                           // filtering results, as a key into the `tag_members_fractions`
-                           // object.  If we don't know the geometry because the member is
-                           // not yet downloaded, it's ok to guess based on type.
-                           var geometry;
-                           if (d.member) {
-                               geometry = context.graph().geometry(d.member.id);
-                           } else if (d.type === 'relation') {
-                               geometry = 'relation';
-                           } else if (d.type === 'way') {
-                               geometry = 'line';
-                           } else {
-                               geometry = 'point';
-                           }
+               context.map().centerZoomEase(_qaItem.loc, 20);

 
 

-                           var rtype = entity.tags.type;
-                           taginfo.roles({
-                               debounce: true,
-                               rtype: rtype || '',
-                               geometry: geometry,
-                               query: role
-                           }, function(err, data) {
-                               if (!err) { callback(sort(role, data)); }
-                           });
-                       })
-                       .on('cancel', function() {
-                           role.property('value', origValue);
-                       })
-                   );
+               if (entity) {
+                 context.enter(modeSelect(context, [entityID]));
+               } else {
+                 context.loadEntity(entityID, function (err, result) {
+                   if (err) return;
+                   var entity = result.data.find(function (e) {
+                     return e.id === entityID;
+                   });
+                   if (entity) context.enter(modeSelect(context, [entityID]));
+                 });

                }
                }

+             }); // Replace with friendly name if possible
+             // (The entity may not yet be loaded into the graph)

 
 

+             if (entity) {
+               var name = utilDisplayName(entity); // try to use common name

 
 

-               function unbind() {
-                   var row = select(this);
+               if (!name && !isObjectLink) {
+                 var preset = _mainPresetIndex.match(entity, context.graph());
+                 name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+               }

 
 

-                   row.selectAll('input.member-role')
-                       .call(uiCombobox.off, context);
+               if (name) {
+                 this.innerText = name;

                }
                }

-           }
+             }
+           }); // Don't hide entities related to this issue - #5880

 
 

-           section.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               _entityIDs = val;
-               return section;
-           };
+           context.features().forceVisible(relatedEntities);
+           context.map().pan([0, 0]); // trigger a redraw
+         }

 
 

+         keepRightDetails.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return keepRightDetails;
+         };

 
 

-           return section;
+         return keepRightDetails;

        }
 
        }
 

-       function uiSectionRawMembershipEditor(context) {
-
-           var section = uiSection('raw-membership-editor', context)
-               .shouldDisplay(function() {
-                   return _entityIDs && _entityIDs.length === 1;
-               })
-               .title(function() {
-                   var entity = context.hasEntity(_entityIDs[0]);
-                   if (!entity) { return ''; }
-
-                   var parents = context.graph().parentRelations(entity);
-                   var gt = parents.length > _maxMemberships ? '>' : '';
-                   var count = gt + parents.slice(0, _maxMemberships).length;
-                   return _t('inspector.title_count', { title: _t('inspector.relations'), count: count });
-               })
-               .disclosureContent(renderDisclosureContent);
-
-           var taginfo = services.taginfo;
-           var nearbyCombo = uiCombobox(context, 'parent-relation')
-               .minItems(1)
-               .fetcher(fetchNearbyRelations)
-               .itemsMouseEnter(function(d) {
-                   if (d.relation) { utilHighlightEntities([d.relation.id], true, context); }
-               })
-               .itemsMouseLeave(function(d) {
-                   if (d.relation) { utilHighlightEntities([d.relation.id], false, context); }
-               });
-           var _inChange = false;
-           var _entityIDs = [];
-           var _showBlank;
-           var _maxMemberships = 1000;
+       function uiKeepRightHeader() {
+         var _qaItem;

 
 

-           function selectRelation(d) {
-               event.preventDefault();
+         function issueTitle(d) {
+           var itemType = d.itemType,
+               parentIssueType = d.parentIssueType;
+           var unknown = _t.html('inspector.unknown');
+           var replacements = d.replacements || {};
+           replacements["default"] = unknown; // special key `default` works as a fallback string

 
 

-               // remove the hover-highlight styling
-               utilHighlightEntities([d.relation.id], false, context);
+           var title = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);

 
 

-               context.enter(modeSelect(context, [d.relation.id]));
+           if (title === unknown) {
+             title = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);

            }
 
            }
 

-           function zoomToRelation(d) {
-               event.preventDefault();
+           return title;
+         }

 
 

-               var entity = context.entity(d.relation.id);
-               context.map().zoomToEase(entity);
+         function keepRightHeader(selection) {
+           var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           });
+           header.exit().remove();
+           var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+           var iconEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+             return d.id < 0;
+           });
+           iconEnter.append('div').attr('class', function (d) {
+             return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
+           }).call(svgIcon('#iD-icon-bolt', 'qaItem-fill'));
+           headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
+         }

 
 

-               // highlight the relation in case it wasn't previously on-screen
-               utilHighlightEntities([d.relation.id], true, context);
-           }
+         keepRightHeader.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return keepRightHeader;
+         };

 
 

+         return keepRightHeader;
+       }

 
 

-           function changeRole(d) {
-               if (d === 0) { return; }    // called on newrow (shoudn't happen)
-               if (_inChange) { return; }  // avoid accidental recursive call #5731
+       function uiViewOnKeepRight() {
+         var _qaItem;

 
 

-               var oldRole = d.member.role;
-               var newRole = context.cleanRelationRole(select(this).property('value'));
+         function viewOnKeepRight(selection) {
+           var url;

 
 

-               if (oldRole !== newRole) {
-                   _inChange = true;
-                   context.perform(
-                       actionChangeMember(d.relation.id, Object.assign({}, d.member, { role: newRole }), d.index),
-                       _t('operations.change_role.annotation')
-                   );
-               }
-               _inChange = false;
+           if (services.keepRight && _qaItem instanceof QAItem) {
+             url = services.keepRight.issueURL(_qaItem);

            }
 
            }
 

+           var link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit

 
 

-           function addMembership(d, role) {
-               this.blur();           // avoid keeping focus on the button
-               _showBlank = false;
+           link.exit().remove(); // enter

 
 

-               var member = { id: _entityIDs[0], type: context.entity(_entityIDs[0]).type, role: role };
+           var linkEnter = link.enter().append('a').attr('class', 'view-on-keepRight').attr('target', '_blank').attr('rel', 'noopener') // security measure
+           .attr('href', function (d) {
+             return d;
+           }).call(svgIcon('#iD-icon-out-link', 'inline'));
+           linkEnter.append('span').html(_t.html('inspector.view_on_keepRight'));
+         }

 
 

-               if (d.relation) {
-                   context.perform(
-                       actionAddMember(d.relation.id, member),
-                       _t('operations.add_member.annotation')
-                   );
+         viewOnKeepRight.what = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return viewOnKeepRight;
+         };

 
 

-               } else {
-                   var relation = osmRelation();
-                   context.perform(
-                       actionAddEntity(relation),
-                       actionAddMember(relation.id, member),
-                       _t('operations.add.annotation.relation')
-                   );
+         return viewOnKeepRight;
+       }

 
 

-                   context.enter(modeSelect(context, [relation.id]).newFeature(true));
-               }
-           }
+       function uiKeepRightEditor(context) {
+         var dispatch = dispatch$8('change');
+         var qaDetails = uiKeepRightDetails(context);
+         var qaHeader = uiKeepRightHeader();

 
 

+         var _qaItem;

 
 

-           function deleteMembership(d) {
-               this.blur();           // avoid keeping focus on the button
-               if (d === 0) { return; }   // called on newrow (shoudn't happen)
+         function keepRightEditor(selection) {
+           var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'close').on('click', function () {
+             return context.enter(modeBrowse(context));
+           }).call(svgIcon('#iD-icon-close'));
+           headerEnter.append('h3').html(_t.html('QA.keepRight.title'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body);
+           var editor = body.selectAll('.qa-editor').data([0]);
+           editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(keepRightSaveSection);
+           var footer = selection.selectAll('.footer').data([0]);
+           footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnKeepRight().what(_qaItem));
+         }

 
 

-               // remove the hover-highlight styling
-               utilHighlightEntities([d.relation.id], false, context);
+         function keepRightSaveSection(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();

 
 

-               context.perform(
-                   actionDeleteMember(d.relation.id, d.index),
-                   _t('operations.delete_member.annotation')
-               );
-           }
+           var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
+           var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           }); // exit

 
 

+           saveSection.exit().remove(); // enter

 
 

-           function fetchNearbyRelations(q, callback) {
-               var newRelation = { relation: null, value: _t('inspector.new_relation') };
+           var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
+           saveSectionEnter.append('h4').attr('class', '.qa-save-header').html(_t.html('QA.keepRight.comment'));
+           saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
+             return d.newComment || d.comment;
+           }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update
+
+           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
+
+           function changeInput() {
+             var input = select(this);
+             var val = input.property('value').trim();
+
+             if (val === _qaItem.comment) {
+               val = undefined;
+             } // store the unsaved comment with the issue itself

 
 

-               var entityID = _entityIDs[0];

 
 

-               var result = [];
+             _qaItem = _qaItem.update({
+               newComment: val
+             });
+             var qaService = services.keepRight;

 
 

-               var graph = context.graph();
+             if (qaService) {
+               qaService.replaceItem(_qaItem); // update keepright cache
+             }

 
 

-               function baseDisplayLabel(entity) {
-                   var matched = _mainPresetIndex.match(entity, graph);
-                   var presetName = (matched && matched.name()) || _t('inspector.relation');
-                   var entityName = utilDisplayName(entity) || '';
+             saveSection.call(qaSaveButtons);
+           }
+         }

 
 

-                   return presetName + ' ' + entityName;
-               }
+         function qaSaveButtons(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();

 
 

-               var explicitRelation = q && context.hasEntity(q.toLowerCase());
-               if (explicitRelation && explicitRelation.type === 'relation' && explicitRelation.id !== entityID) {
-                   // loaded relation is specified explicitly, only show that
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+             return d.status + d.id;
+           }); // exit

 
 

-                   result.push({
-                       relation: explicitRelation,
-                       value: baseDisplayLabel(explicitRelation) + ' ' + explicitRelation.id
-                   });
-               } else {
+           buttonSection.exit().remove(); // enter

 
 

-                   context.history().intersects(context.map().extent()).forEach(function(entity) {
-                       if (entity.type !== 'relation' || entity.id === entityID) { return; }
+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+           buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('QA.keepRight.save_comment'));
+           buttonEnter.append('button').attr('class', 'button close-button action');
+           buttonEnter.append('button').attr('class', 'button ignore-button action'); // update

 
 

-                       var value = baseDisplayLabel(entity);
-                       if (q && (value + ' ' + entity.id).toLowerCase().indexOf(q.toLowerCase()) === -1) { return; }
+           buttonSection = buttonSection.merge(buttonEnter);
+           buttonSection.select('.comment-button') // select and propagate data
+           .attr('disabled', function (d) {
+             return d.newComment ? null : true;
+           }).on('click.comment', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641

 
 

-                       result.push({ relation: entity, value: value });
-                   });
+             var qaService = services.keepRight;

 
 

-                   result.sort(function(a, b) {
-                       return osmRelation.creationOrder(a.relation, b.relation);
-                   });
+             if (qaService) {
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
+             }
+           });
+           buttonSection.select('.close-button') // select and propagate data
+           .html(function (d) {
+             var andComment = d.newComment ? '_comment' : '';
+             return _t.html("QA.keepRight.close".concat(andComment));
+           }).on('click.close', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641

 
 

-                   // Dedupe identical names by appending relation id - see #2891
-                   var dupeGroups = Object.values(utilArrayGroupBy(result, 'value'))
-                       .filter(function(v) { return v.length > 1; });
+             var qaService = services.keepRight;

 
 

-                   dupeGroups.forEach(function(group) {
-                       group.forEach(function(obj) {
-                           obj.value += ' ' + obj.relation.id;
-                       });
-                   });
-               }
+             if (qaService) {
+               d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)

 
 

-               result.forEach(function(obj) {
-                   obj.title = obj.value;
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);

                });
                });

+             }
+           });
+           buttonSection.select('.ignore-button') // select and propagate data
+           .html(function (d) {
+             var andComment = d.newComment ? '_comment' : '';
+             return _t.html("QA.keepRight.ignore".concat(andComment));
+           }).on('click.ignore', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641

 
 

-               result.unshift(newRelation);
-               callback(result);
-           }
+             var qaService = services.keepRight;

 
 

-           function renderDisclosureContent(selection) {
+             if (qaService) {
+               d.newStatus = 'ignore'; // ignore permanently (false positive)
+
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
+             }
+           });
+         } // NOTE: Don't change method name until UI v3 is merged

 
 

-               var entityID = _entityIDs[0];

 
 

-               var entity = context.entity(entityID);
-               var parents = context.graph().parentRelations(entity);
+         keepRightEditor.error = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return keepRightEditor;
+         };

 
 

-               var memberships = [];
+         return utilRebind(keepRightEditor, dispatch, 'on');
+       }

 
 

-               parents.slice(0, _maxMemberships).forEach(function(relation) {
-                   relation.members.forEach(function(member, index) {
-                       if (member.id === entity.id) {
-                           memberships.push({
-                               relation: relation,
-                               member: member,
-                               index: index,
-                               domId: utilUniqueDomId(entityID + '-membership-' + relation.id + '-' + index)
-                           });
-                       }
-                   });
-               });
+       function uiOsmoseDetails(context) {
+         var _qaItem;

 
 

-               var list = selection.selectAll('.member-list')
-                   .data([0]);
+         function issueString(d, type) {
+           if (!d) return ''; // Issue strings are cached from Osmose API

 
 

-               list = list.enter()
-                   .append('ul')
-                   .attr('class', 'member-list')
-                   .merge(list);
+           var s = services.osmose.getStrings(d.itemType);
+           return type in s ? s[type] : '';
+         }

 
 

+         function osmoseDetails(selection) {
+           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           });
+           details.exit().remove();
+           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // Description

 
 

-               var items = list.selectAll('li.member-row-normal')
-                   .data(memberships, function(d) {
-                       return osmEntity.key(d.relation) + ',' + d.index;
-                   });
+           if (issueString(_qaItem, 'detail')) {
+             var div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+             div.append('h4').html(_t.html('QA.keepRight.detail_description'));
+             div.append('p').attr('class', 'qa-details-description-text').html(function (d) {
+               return issueString(d, 'detail');
+             }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+           } // Elements (populated later as data is requested)

 
 

-               items.exit()
-                   .each(unbind)
-                   .remove();
-
-               // Enter
-               var itemsEnter = items.enter()
-                   .append('li')
-                   .attr('class', 'member-row member-row-normal form-field');
-
-               // highlight the relation in the map while hovering on the list item
-               itemsEnter.on('mouseover', function(d) {
-                       utilHighlightEntities([d.relation.id], true, context);
-                   })
-                   .on('mouseout', function(d) {
-                       utilHighlightEntities([d.relation.id], false, context);
-                   });

 
 

-               var labelEnter = itemsEnter
-                   .append('label')
-                   .attr('class', 'field-label')
-                   .attr('for', function(d) {
-                       return d.domId;
-                   });
+           var detailsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+           var elemsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection'); // Suggested Fix (mustn't exist for every issue type)

 
 

-               var labelLink = labelEnter
-                   .append('span')
-                   .attr('class', 'label-text')
-                   .append('a')
-                   .attr('href', '#')
-                   .on('click', selectRelation);
-
-               labelLink
-                   .append('span')
-                   .attr('class', 'member-entity-type')
-                   .text(function(d) {
-                       var matched = _mainPresetIndex.match(d.relation, context.graph());
-                       return (matched && matched.name()) || _t('inspector.relation');
-                   });
+           if (issueString(_qaItem, 'fix')) {
+             var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');

 
 

-               labelLink
-                   .append('span')
-                   .attr('class', 'member-entity-name')
-                   .text(function(d) { return utilDisplayName(d.relation); });
-
-               labelEnter
-                   .append('button')
-                   .attr('tabindex', -1)
-                   .attr('class', 'remove member-delete')
-                   .call(svgIcon('#iD-operation-delete'))
-                   .on('click', deleteMembership);
-
-               labelEnter
-                   .append('button')
-                   .attr('class', 'member-zoom')
-                   .attr('title', _t('icons.zoom_to'))
-                   .call(svgIcon('#iD-icon-framed-dot', 'monochrome'))
-                   .on('click', zoomToRelation);
-
-               var wrapEnter = itemsEnter
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-member');
-
-               wrapEnter
-                   .append('input')
-                   .attr('class', 'member-role')
-                   .attr('id', function(d) {
-                       return d.domId;
-                   })
-                   .property('type', 'text')
-                   .attr('placeholder', _t('inspector.role'))
-                   .call(utilNoAuto)
-                   .property('value', function(d) { return d.member.role; })
-                   .on('blur', changeRole)
-                   .on('change', changeRole);
-
-               if (taginfo) {
-                   wrapEnter.each(bindTypeahead);
-               }
-
-
-               var newMembership = list.selectAll('.member-row-new')
-                   .data(_showBlank ? [0] : []);
-
-               // Exit
-               newMembership.exit()
-                   .remove();
-
-               // Enter
-               var newMembershipEnter = newMembership.enter()
-                   .append('li')
-                   .attr('class', 'member-row member-row-new form-field');
-
-               var newLabelEnter = newMembershipEnter
-                   .append('label')
-                   .attr('class', 'field-label');
-
-               newLabelEnter
-                   .append('input')
-                   .attr('placeholder', _t('inspector.choose_relation'))
-                   .attr('type', 'text')
-                   .attr('class', 'member-entity-input')
-                   .call(utilNoAuto);
-
-               newLabelEnter
-                   .append('button')
-                   .attr('tabindex', -1)
-                   .attr('class', 'remove member-delete')
-                   .call(svgIcon('#iD-operation-delete'))
-                   .on('click', function() {
-                       list.selectAll('.member-row-new')
-                           .remove();
-                   });
+             _div.append('h4').html(_t.html('QA.osmose.fix_title'));

 
 

-               var newWrapEnter = newMembershipEnter
-                   .append('div')
-                   .attr('class', 'form-field-input-wrap form-field-input-member');
+             _div.append('p').html(function (d) {
+               return issueString(d, 'fix');
+             }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+           } // Common Pitfalls (mustn't exist for every issue type)

 
 

-               newWrapEnter
-                   .append('input')
-                   .attr('class', 'member-role')
-                   .property('type', 'text')
-                   .attr('placeholder', _t('inspector.role'))
-                   .call(utilNoAuto);

 
 

-               // Update
-               newMembership = newMembership
-                   .merge(newMembershipEnter);
+           if (issueString(_qaItem, 'trap')) {
+             var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');

 
 

-               newMembership.selectAll('.member-entity-input')
-                   .on('blur', cancelEntity)   // if it wasn't accepted normally, cancel it
-                   .call(nearbyCombo
-                       .on('accept', acceptEntity)
-                       .on('cancel', cancelEntity)
-                   );
+             _div2.append('h4').html(_t.html('QA.osmose.trap_title'));

 
 

+             _div2.append('p').html(function (d) {
+               return issueString(d, 'trap');
+             }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+           } // Save current item to check if UI changed by time request resolves

 
 

-               // Container for the Add button
-               var addRow = selection.selectAll('.add-row')
-                   .data([0]);

 
 

-               // enter
-               var addRowEnter = addRow.enter()
-                   .append('div')
-                   .attr('class', 'add-row');
+           var thisItem = _qaItem;
+           services.osmose.loadIssueDetail(_qaItem).then(function (d) {
+             // No details to add if there are no associated issue elements
+             if (!d.elems || d.elems.length === 0) return; // Do nothing if UI has moved on by the time this resolves

 
 

-               var addRelationButton = addRowEnter
-                   .append('button')
-                   .attr('class', 'add-relation');
+             if (context.selectedErrorID() !== thisItem.id && context.container().selectAll(".qaItem.osmose.hover.itemId-".concat(thisItem.id)).empty()) return; // Things like keys and values are dynamically added to a subtitle string

 
 

-               addRelationButton
-                   .call(svgIcon('#iD-icon-plus', 'light'));
-               addRelationButton
-                   .call(uiTooltip().title(_t('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
+             if (d.detail) {
+               detailsDiv.append('h4').html(_t.html('QA.osmose.detail_title'));
+               detailsDiv.append('p').html(function (d) {
+                 return d.detail;
+               }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+             } // Create list of linked issue elements

 
 

-               addRowEnter
-                   .append('div')
-                   .attr('class', 'space-value');   // preserve space

 
 

-               addRowEnter
-                   .append('div')
-                   .attr('class', 'space-buttons');  // preserve space
+             elemsDiv.append('h4').html(_t.html('QA.osmose.elems_title'));
+             elemsDiv.append('ul').selectAll('li').data(d.elems).enter().append('li').append('a').attr('href', '#').attr('class', 'error_entity_link').html(function (d) {
+               return d;
+             }).each(function () {
+               var link = select(this);
+               var entityID = this.textContent;
+               var entity = context.hasEntity(entityID); // Add click handler
+
+               link.on('mouseenter', function () {
+                 utilHighlightEntities([entityID], true, context);
+               }).on('mouseleave', function () {
+                 utilHighlightEntities([entityID], false, context);
+               }).on('click', function (d3_event) {
+                 d3_event.preventDefault();
+                 utilHighlightEntities([entityID], false, context);
+                 var osmlayer = context.layers().layer('osm');
+
+                 if (!osmlayer.enabled()) {
+                   osmlayer.enabled(true);
+                 }

 
 

-               // update
-               addRow = addRow
-                   .merge(addRowEnter);
+                 context.map().centerZoom(d.loc, 20);

 
 

-               addRow.select('.add-relation')
-                   .on('click', function() {
-                       _showBlank = true;
-                       section.reRender();
-                       list.selectAll('.member-entity-input').node().focus();
+                 if (entity) {
+                   context.enter(modeSelect(context, [entityID]));
+                 } else {
+                   context.loadEntity(entityID, function (err, result) {
+                     if (err) return;
+                     var entity = result.data.find(function (e) {
+                       return e.id === entityID;
+                     });
+                     if (entity) context.enter(modeSelect(context, [entityID]));

                    });
                    });

+                 }
+               }); // Replace with friendly name if possible
+               // (The entity may not yet be loaded into the graph)

 
 

+               if (entity) {
+                 var name = utilDisplayName(entity); // try to use common name

 
 

-               function acceptEntity(d) {
-                   if (!d) {
-                       cancelEntity();
-                       return;
-                   }
-                   // remove hover-higlighting
-                   if (d.relation) { utilHighlightEntities([d.relation.id], false, context); }
+                 if (!name) {
+                   var preset = _mainPresetIndex.match(entity, context.graph());
+                   name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+                 }

 
 

-                   var role = context.cleanRelationRole(list.selectAll('.member-row-new .member-role').property('value'));
-                   addMembership(d, role);
+                 if (name) {
+                   this.innerText = name;
+                 }

                }
                }

+             }); // Don't hide entities related to this issue - #5880

 
 

+             context.features().forceVisible(d.elems);
+             context.map().pan([0, 0]); // trigger a redraw
+           })["catch"](function (err) {
+             console.log(err); // eslint-disable-line no-console
+           });
+         }

 
 

-               function cancelEntity() {
-                   var input = newMembership.selectAll('.member-entity-input');
-                   input.property('value', '');
+         osmoseDetails.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return osmoseDetails;
+         };

 
 

-                   // remove hover-higlighting
-                   context.surface().selectAll('.highlighted')
-                       .classed('highlighted', false);
-               }
+         return osmoseDetails;
+       }

 
 

+       function uiOsmoseHeader() {
+         var _qaItem;

 
 

-               function bindTypeahead(d) {
-                   var row = select(this);
-                   var role = row.selectAll('input.member-role');
-                   var origValue = role.property('value');
+         function issueTitle(d) {
+           var unknown = _t('inspector.unknown');
+           if (!d) return unknown; // Issue titles supplied by Osmose

 
 

-                   function sort(value, data) {
-                       var sameletter = [];
-                       var other = [];
-                       for (var i = 0; i < data.length; i++) {
-                           if (data[i].value.substring(0, value.length) === value) {
-                               sameletter.push(data[i]);
-                           } else {
-                               other.push(data[i]);
-                           }
-                       }
-                       return sameletter.concat(other);
-                   }
+           var s = services.osmose.getStrings(d.itemType);
+           return 'title' in s ? s.title : unknown;
+         }

 
 

-                   role.call(uiCombobox(context, 'member-role')
-                       .fetcher(function(role, callback) {
-                           var rtype = d.relation.tags.type;
-                           taginfo.roles({
-                               debounce: true,
-                               rtype: rtype || '',
-                               geometry: context.graph().geometry(entityID),
-                               query: role
-                           }, function(err, data) {
-                               if (!err) { callback(sort(role, data)); }
-                           });
-                       })
-                       .on('cancel', function() {
-                           role.property('value', origValue);
-                       })
-                   );
-               }
+         function osmoseHeader(selection) {
+           var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           });
+           header.exit().remove();
+           var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+           var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+             return d.id < 0;
+           }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
+             return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+           });
+           svgEnter.append('polygon').attr('fill', function (d) {
+             return services.osmose.getColor(d.item);
+           }).attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+           svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
+             var picon = d.icon;

 
 

+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return "#".concat(picon).concat(isMaki ? '-11' : '');
+             }
+           });
+           headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
+         }

 
 

-               function unbind() {
-                   var row = select(this);
+         osmoseHeader.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return osmoseHeader;
+         };

 
 

-                   row.selectAll('input.member-role')
-                       .call(uiCombobox.off, context);
-               }
-           }
+         return osmoseHeader;
+       }

 
 

+       function uiViewOnOsmose() {
+         var _qaItem;

 
 

-           section.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               _entityIDs = val;
-               _showBlank = false;
-               return section;
-           };
+         function viewOnOsmose(selection) {
+           var url;

 
 

+           if (services.osmose && _qaItem instanceof QAItem) {
+             url = services.osmose.itemURL(_qaItem);
+           }

 
 

-           return section;
-       }
+           var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit

 
 

-       function uiSectionSelectionList(context) {
+           link.exit().remove(); // enter

 
 

-           var _selectedIDs = [];
+           var linkEnter = link.enter().append('a').attr('class', 'view-on-osmose').attr('target', '_blank').attr('rel', 'noopener') // security measure
+           .attr('href', function (d) {
+             return d;
+           }).call(svgIcon('#iD-icon-out-link', 'inline'));
+           linkEnter.append('span').html(_t.html('inspector.view_on_osmose'));
+         }

 
 

-           var section = uiSection('selected-features', context)
-               .shouldDisplay(function() {
-                   return _selectedIDs.length > 1;
-               })
-               .title(function() {
-                   return _t('inspector.title_count', { title: _t('inspector.features'), count: _selectedIDs.length });
-               })
-               .disclosureContent(renderDisclosureContent);
+         viewOnOsmose.what = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return viewOnOsmose;
+         };

 
 

-           context.history()
-               .on('change.selectionList', function(difference) {
-                   if (difference) {
-                       section.reRender();
-                   }
-               });
+         return viewOnOsmose;
+       }

 
 

-           section.entityIDs = function(val) {
-               if (!arguments.length) { return _selectedIDs; }
-               _selectedIDs = val;
-               return section;
-           };
+       function uiOsmoseEditor(context) {
+         var dispatch = dispatch$8('change');
+         var qaDetails = uiOsmoseDetails(context);
+         var qaHeader = uiOsmoseHeader();

 
 

-           function selectEntity(entity) {
-               context.enter(modeSelect(context, [entity.id]));
-           }
+         var _qaItem;

 
 

-           function deselectEntity(entity) {
-               event.stopPropagation();
+         function osmoseEditor(selection) {
+           var header = selection.selectAll('.header').data([0]);
+           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'close').on('click', function () {
+             return context.enter(modeBrowse(context));
+           }).call(svgIcon('#iD-icon-close'));
+           headerEnter.append('h3').html(_t.html('QA.osmose.title'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body);
+           var editor = body.selectAll('.qa-editor').data([0]);
+           editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(osmoseSaveSection);
+           var footer = selection.selectAll('.footer').data([0]);
+           footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOsmose().what(_qaItem));
+         }

 
 

-               var selectedIDs = _selectedIDs.slice();
-               var index = selectedIDs.indexOf(entity.id);
-               if (index > -1) {
-                   selectedIDs.splice(index, 1);
-                   context.enter(modeSelect(context, selectedIDs));
-               }
-           }
+         function osmoseSaveSection(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();

 
 

-           function renderDisclosureContent(selection) {
+           var isShown = _qaItem && isSelected;
+           var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           }); // exit

 
 

-               var list = selection.selectAll('.feature-list')
-                   .data([0]);
+           saveSection.exit().remove(); // enter

 
 

-               list = list.enter()
-                   .append('div')
-                   .attr('class', 'feature-list')
-                   .merge(list);
+           var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update

 
 

-               var entities = _selectedIDs
-                   .map(function(id) { return context.hasEntity(id); })
-                   .filter(Boolean);
+           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
+         }

 
 

-               var items = list.selectAll('.feature-list-item')
-                   .data(entities, osmEntity.key);
+         function qaSaveButtons(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();

 
 

-               items.exit()
-                   .remove();
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+             return d.status + d.id;
+           }); // exit

 
 

-               // Enter
-               var enter = items.enter()
-                   .append('div')
-                   .attr('class', 'feature-list-item')
-                   .on('click', selectEntity);
+           buttonSection.exit().remove(); // enter

 
 

-               enter
-                   .each(function(d) {
-                       select(this).on('mouseover', function() {
-                           utilHighlightEntities([d.id], true, context);
-                       });
-                       select(this).on('mouseout', function() {
-                           utilHighlightEntities([d.id], false, context);
-                       });
-                   });
+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+           buttonEnter.append('button').attr('class', 'button close-button action');
+           buttonEnter.append('button').attr('class', 'button ignore-button action'); // update

 
 

-               var label = enter
-                   .append('button')
-                   .attr('class', 'label');
-
-               enter
-                   .append('button')
-                   .attr('class', 'close')
-                   .attr('title', _t('icons.deselect'))
-                   .on('click', deselectEntity)
-                   .call(svgIcon('#iD-icon-close'));
-
-               label
-                   .append('span')
-                   .attr('class', 'entity-geom-icon')
-                   .call(svgIcon('', 'pre-text'));
-
-               label
-                   .append('span')
-                   .attr('class', 'entity-type');
-
-               label
-                   .append('span')
-                   .attr('class', 'entity-name');
-
-               // Update
-               items = items.merge(enter);
-
-               items.selectAll('.entity-geom-icon use')
-                   .attr('href', function() {
-                       var entity = this.parentNode.parentNode.__data__;
-                       return '#iD-icon-' + entity.geometry(context.graph());
-                   });
+           buttonSection = buttonSection.merge(buttonEnter);
+           buttonSection.select('.close-button').html(_t.html('QA.keepRight.close')).on('click.close', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641

 
 

-               items.selectAll('.entity-type')
-                   .text(function(entity) { return _mainPresetIndex.match(entity, context.graph()).name(); });
+             var qaService = services.osmose;

 
 

-               items.selectAll('.entity-name')
-                   .text(function(d) {
-                       // fetch latest entity
-                       var entity = context.entity(d.id);
-                       return utilDisplayName(entity);
-                   });
-           }
+             if (qaService) {
+               d.newStatus = 'done';
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
+             }
+           });
+           buttonSection.select('.ignore-button').html(_t.html('QA.keepRight.ignore')).on('click.ignore', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641

 
 

-           return section;
-       }
+             var qaService = services.osmose;

 
 

-       function uiEntityEditor(context) {
-           var dispatch$1 = dispatch('choose');
-           var _state = 'select';
-           var _coalesceChanges = false;
-           var _modified = false;
-           var _base;
-           var _entityIDs;
-           var _activePresets = [];
-           var _newFeature;
+             if (qaService) {
+               d.newStatus = 'false';
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
+             }
+           });
+         } // NOTE: Don't change method name until UI v3 is merged

 
 

-           var _sections;

 
 

-           function entityEditor(selection) {
+         osmoseEditor.error = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return osmoseEditor;
+         };

 
 

-               var combinedTags = utilCombinedTags(_entityIDs, context.graph());
+         return utilRebind(osmoseEditor, dispatch, 'on');
+       }

 
 

-               // Header
-               var header = selection.selectAll('.header')
-                   .data([0]);
+       function uiNoteComments() {
+         var _note;
+
+         function noteComments(selection) {
+           if (_note.isNew()) return; // don't draw .comments-container
+
+           var comments = selection.selectAll('.comments-container').data([0]);
+           comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments);
+           var commentEnter = comments.selectAll('.comment').data(_note.comments).enter().append('div').attr('class', 'comment');
+           commentEnter.append('div').attr('class', function (d) {
+             return 'comment-avatar user-' + d.uid;
+           }).call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+           var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
+           var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
+           metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
+             var selection = select(this);
+             var osm = services.osm;

 
 

-               // Enter
-               var headerEnter = header.enter()
-                   .append('div')
-                   .attr('class', 'header fillL cf');
+             if (osm && d.user) {
+               selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
+             }

 
 

-               headerEnter
-                   .append('button')
-                   .attr('class', 'preset-reset preset-choose')
-                   .call(svgIcon((_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-forward' : '#iD-icon-backward'));
+             selection.html(function (d) {
+               return d.user || _t.html('note.anonymous');
+             });
+           });
+           metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
+             return _t('note.status.' + d.action, {
+               when: localeDateString(d.date)
+             });
+           });
+           mainEnter.append('div').attr('class', 'comment-text').html(function (d) {
+             return d.html;
+           }).selectAll('a').attr('rel', 'noopener nofollow').attr('target', '_blank');
+           comments.call(replaceAvatars);
+         }

 
 

-               headerEnter
-                   .append('button')
-                   .attr('class', 'close')
-                   .on('click', function() { context.enter(modeBrowse(context)); })
-                   .call(svgIcon(_modified ? '#iD-icon-apply' : '#iD-icon-close'));
+         function replaceAvatars(selection) {
+           var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+           var osm = services.osm;
+           if (showThirdPartyIcons !== 'true' || !osm) return;
+           var uids = {}; // gather uids in the comment thread

 
 

-               headerEnter
-                   .append('h3');
+           _note.comments.forEach(function (d) {
+             if (d.uid) uids[d.uid] = true;
+           });

 
 

-               // Update
-               header = header
-                   .merge(headerEnter);
+           Object.keys(uids).forEach(function (uid) {
+             osm.loadUser(uid, function (err, user) {
+               if (!user || !user.image_url) return;
+               selection.selectAll('.comment-avatar.user-' + uid).html('').append('img').attr('class', 'icon comment-avatar-icon').attr('src', user.image_url).attr('alt', user.display_name);
+             });
+           });
+         }

 
 

-               header.selectAll('h3')
-                   .text(_entityIDs.length === 1 ? _t('inspector.edit') : _t('inspector.edit_features'));
+         function localeDateString(s) {
+           if (!s) return null;
+           var options = {
+             day: 'numeric',
+             month: 'short',
+             year: 'numeric'
+           };
+           s = s.replace(/-/g, '/'); // fix browser-specific Date() issues

 
 

-               header.selectAll('.preset-reset')
-                   .on('click', function() {
-                       dispatch$1.call('choose', this, _activePresets);
-                   });
+           var d = new Date(s);
+           if (isNaN(d.getTime())) return null;
+           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+         }

 
 

-               // Body
-               var body = selection.selectAll('.inspector-body')
-                   .data([0]);
+         noteComments.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteComments;
+         };

 
 

-               // Enter
-               var bodyEnter = body.enter()
-                   .append('div')
-                   .attr('class', 'entity-editor inspector-body sep-top');
-
-               // Update
-               body = body
-                   .merge(bodyEnter);
-
-               if (!_sections) {
-                   _sections = [
-                       uiSectionSelectionList(context),
-                       uiSectionFeatureType(context).on('choose', function(presets) {
-                           dispatch$1.call('choose', this, presets);
-                       }),
-                       uiSectionEntityIssues(context),
-                       uiSectionPresetFields(context).on('change', changeTags).on('revert', revertTags),
-                       uiSectionRawTagEditor('raw-tag-editor', context).on('change', changeTags),
-                       uiSectionRawMemberEditor(context),
-                       uiSectionRawMembershipEditor(context)
-                   ];
-               }
-
-               _sections.forEach(function(section) {
-                   if (section.entityIDs) {
-                       section.entityIDs(_entityIDs);
-                   }
-                   if (section.presets) {
-                       section.presets(_activePresets);
-                   }
-                   if (section.tags) {
-                       section.tags(combinedTags);
-                   }
-                   if (section.state) {
-                       section.state(_state);
-                   }
-                   body.call(section.render);
-               });
+         return noteComments;
+       }

 
 

-               body
-                   .selectAll('.key-trap-wrap')
-                   .data([0])
-                   .enter()
-                   .append('div')
-                   .attr('class', 'key-trap-wrap')
-                   .append('input')
-                   .attr('type', 'text')
-                   .attr('class', 'key-trap')
-                   .on('keydown.key-trap', function() {
-                       // On tabbing, send focus back to the first field on the inspector-body
-                       // (probably the `name` field) #4159
-                       if (event.keyCode === 9 && !event.shiftKey) {
-                           event.preventDefault();
-                           body.select('input').node().focus();
-                       }
-                   });
+       function uiNoteHeader() {
+         var _note;
+
+         function noteHeader(selection) {
+           var header = selection.selectAll('.note-header').data(_note ? [_note] : [], function (d) {
+             return d.status + d.id;
+           });
+           header.exit().remove();
+           var headerEnter = header.enter().append('div').attr('class', 'note-header');
+           var iconEnter = headerEnter.append('div').attr('class', function (d) {
+             return 'note-header-icon ' + d.status;
+           }).classed('new', function (d) {
+             return d.id < 0;
+           });
+           iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-note', 'note-fill'));
+           iconEnter.each(function (d) {
+             var statusIcon;
+
+             if (d.id < 0) {
+               statusIcon = '#iD-icon-plus';
+             } else if (d.status === 'open') {
+               statusIcon = '#iD-icon-close';
+             } else {
+               statusIcon = '#iD-icon-apply';
+             }

 
 

-               context.history()
-                   .on('change.entity-editor', historyChanged);
+             iconEnter.append('div').attr('class', 'note-icon-annotation').call(svgIcon(statusIcon, 'icon-annotation'));
+           });
+           headerEnter.append('div').attr('class', 'note-header-label').html(function (d) {
+             if (_note.isNew()) {
+               return _t('note.new');
+             }

 
 

-               function historyChanged(difference) {
-                   if (selection.selectAll('.entity-editor').empty()) { return; }
-                   if (_state === 'hide') { return; }
-                   var significant = !difference ||
-                           difference.didChange.properties ||
-                           difference.didChange.addition ||
-                           difference.didChange.deletion;
-                   if (!significant) { return; }
+             return _t('note.note') + ' ' + d.id + ' ' + (d.status === 'closed' ? _t('note.closed') : '');
+           });
+         }

 
 

-                   _entityIDs = _entityIDs.filter(context.hasEntity);
-                   if (!_entityIDs.length) { return; }
+         noteHeader.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteHeader;
+         };

 
 

-                   var priorActivePreset = _activePresets.length === 1 && _activePresets[0];
+         return noteHeader;
+       }

 
 

-                   loadActivePresets();
+       function uiNoteReport() {
+         var _note;

 
 

-                   var graph = context.graph();
-                   entityEditor.modified(_base !== graph);
-                   entityEditor(selection);
+         function noteReport(selection) {
+           var url;

 
 

-                   if (priorActivePreset && _activePresets.length === 1 && priorActivePreset !== _activePresets[0]) {
-                       // flash the button to indicate the preset changed
-                       context.container().selectAll('.entity-editor button.preset-reset .label')
-                           .style('background-color', '#fff')
-                           .transition()
-                           .duration(750)
-                           .style('background-color', null);
-                   }
-               }
+           if (services.osm && _note instanceof osmNote && !_note.isNew()) {
+             url = services.osm.noteReportURL(_note);

            }
 
            }
 

+           var link = selection.selectAll('.note-report').data(url ? [url] : []); // exit

 
 

-           // Tag changes that fire on input can all get coalesced into a single
-           // history operation when the user leaves the field.  #2342
-           // Use explicit entityIDs in case the selection changes before the event is fired.
-           function changeTags(entityIDs, changed, onInput) {
-
-               var actions = [];
-               for (var i in entityIDs) {
-                   var entityID = entityIDs[i];
-                   var entity = context.entity(entityID);
+           link.exit().remove(); // enter

 
 

-                   var tags = Object.assign({}, entity.tags);   // shallow copy
+           var linkEnter = link.enter().append('a').attr('class', 'note-report').attr('target', '_blank').attr('href', function (d) {
+             return d;
+           }).call(svgIcon('#iD-icon-out-link', 'inline'));
+           linkEnter.append('span').html(_t.html('note.report'));
+         }

 
 

-                   for (var k in changed) {
-                       if (!k) { continue; }
-                       var v = changed[k];
-                       if (v !== undefined || tags.hasOwnProperty(k)) {
-                           tags[k] = v;
-                       }
-                   }
+         noteReport.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteReport;
+         };

 
 

-                   if (!onInput) {
-                       tags = utilCleanTags(tags);
-                   }
+         return noteReport;
+       }

 
 

-                   if (!fastDeepEqual(entity.tags, tags)) {
-                       actions.push(actionChangeTags(entityID, tags));
-                   }
-               }
+       function uiNoteEditor(context) {
+         var dispatch = dispatch$8('change');
+         var noteComments = uiNoteComments();
+         var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);

 
 

-               if (actions.length) {
-                   var combinedAction = function(graph) {
-                       actions.forEach(function(action) {
-                           graph = action(graph);
-                       });
-                       return graph;
-                   };
+         var _note;

 
 

-                   var annotation = _t('operations.change_tags.annotation');
+         var _newNote; // var _fieldsArr;

 
 

-                   if (_coalesceChanges) {
-                       context.overwrite(combinedAction, annotation);
-                   } else {
-                       context.perform(combinedAction, annotation);
-                       _coalesceChanges = !!onInput;
-                   }
-               }

 
 

-               // if leaving field (blur event), rerun validation
-               if (!onInput) {
-                   context.validator().validate();
-               }
+         function noteEditor(selection) {
+           var header = selection.selectAll('.header').data([0]);
+           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'close').on('click', function () {
+             context.enter(modeBrowse(context));
+           }).call(svgIcon('#iD-icon-close'));
+           headerEnter.append('h3').html(_t.html('note.title'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body);
+           var editor = body.selectAll('.note-editor').data([0]);
+           editor.enter().append('div').attr('class', 'modal-section note-editor').merge(editor).call(noteHeader.note(_note)).call(noteComments.note(_note)).call(noteSaveSection);
+           var footer = selection.selectAll('.footer').data([0]);
+           footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOSM(context).what(_note)).call(uiNoteReport().note(_note)); // rerender the note editor on any auth change
+
+           var osm = services.osm;
+
+           if (osm) {
+             osm.on('change.note-save', function () {
+               selection.call(noteEditor);
+             });

            }
            }

+         }

 
 

-           function revertTags(keys) {
+         function noteSaveSection(selection) {
+           var isSelected = _note && _note.id === context.selectedNoteID();

 
 

-               var actions = [];
-               for (var i in _entityIDs) {
-                   var entityID = _entityIDs[i];
+           var noteSave = selection.selectAll('.note-save').data(isSelected ? [_note] : [], function (d) {
+             return d.status + d.id;
+           }); // exit

 
 

-                   var original = context.graph().base().entities[entityID];
-                   var changed = {};
-                   for (var j in keys) {
-                       var key = keys[j];
-                       changed[key] = original ? original.tags[key] : undefined;
-                   }
+           noteSave.exit().remove(); // enter

 
 

-                   var entity = context.entity(entityID);
-                   var tags = Object.assign({}, entity.tags);   // shallow copy
+           var noteSaveEnter = noteSave.enter().append('div').attr('class', 'note-save save-section cf'); // // if new note, show categories to pick from
+           // if (_note.isNew()) {
+           //     var presets = presetManager;
+           //     // NOTE: this key isn't a age and therefore there is no documentation (yet)
+           //     _fieldsArr = [
+           //         uiField(context, presets.field('category'), null, { show: true, revert: false }),
+           //     ];
+           //     _fieldsArr.forEach(function(field) {
+           //         field
+           //             .on('change', changeCategory);
+           //     });
+           //     noteSaveEnter
+           //         .append('div')
+           //         .attr('class', 'note-category')
+           //         .call(formFields.fieldsArr(_fieldsArr));
+           // }
+           // function changeCategory() {
+           //     // NOTE: perhaps there is a better way to get value
+           //     var val = context.container().select('input[name=\'category\']:checked').property('__data__') || undefined;
+           //     // store the unsaved category with the note itself
+           //     _note = _note.update({ newCategory: val });
+           //     var osm = services.osm;
+           //     if (osm) {
+           //         osm.replaceNote(_note);  // update note cache
+           //     }
+           //     noteSave
+           //         .call(noteSaveButtons);
+           // }

 
 

-                   for (var k in changed) {
-                       if (!k) { continue; }
-                       var v = changed[k];
-                       if (v !== undefined || tags.hasOwnProperty(k)) {
-                           tags[k] = v;
-                       }
-                   }
+           noteSaveEnter.append('h4').attr('class', '.note-save-header').html(function () {
+             return _note.isNew() ? _t('note.newDescription') : _t('note.newComment');
+           });
+           var commentTextarea = noteSaveEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('note.inputPlaceholder')).attr('maxlength', 1000).property('value', function (d) {
+             return d.newComment;
+           }).call(utilNoAuto).on('keydown.note-input', keydown).on('input.note-input', changeInput).on('blur.note-input', changeInput);

 
 

+           if (!commentTextarea.empty() && _newNote) {
+             // autofocus the comment field for new notes
+             commentTextarea.node().focus();
+           } // update

 
 

-                   tags = utilCleanTags(tags);

 
 

-                   if (!fastDeepEqual(entity.tags, tags)) {
-                       actions.push(actionChangeTags(entityID, tags));
-                   }
+           noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter

 
 

+           function keydown(d3_event) {
+             if (!(d3_event.keyCode === 13 && // ↩ Return
+             d3_event.metaKey)) return;
+             var osm = services.osm;
+             if (!osm) return;
+             var hasAuth = osm.authenticated();
+             if (!hasAuth) return;
+             if (!_note.newComment) return;
+             d3_event.preventDefault();
+             select(this).on('keydown.note-input', null); // focus on button and submit
+
+             window.setTimeout(function () {
+               if (_note.isNew()) {
+                 noteSave.selectAll('.save-button').node().focus();
+                 clickSave();
+               } else {
+                 noteSave.selectAll('.comment-button').node().focus();
+                 clickComment();

                }
                }

+             }, 10);
+           }

 
 

-               if (actions.length) {
-                   var combinedAction = function(graph) {
-                       actions.forEach(function(action) {
-                           graph = action(graph);
-                       });
-                       return graph;
-                   };
+           function changeInput() {
+             var input = select(this);
+             var val = input.property('value').trim() || undefined; // store the unsaved comment with the note itself

 
 

-                   var annotation = _t('operations.change_tags.annotation');
+             _note = _note.update({
+               newComment: val
+             });
+             var osm = services.osm;

 
 

-                   if (_coalesceChanges) {
-                       context.overwrite(combinedAction, annotation);
-                   } else {
-                       context.perform(combinedAction, annotation);
-                       _coalesceChanges = false;
-                   }
-               }
+             if (osm) {
+               osm.replaceNote(_note); // update note cache
+             }

 
 

-               context.validator().validate();
+             noteSave.call(noteSaveButtons);

            }
            }

+         }

 
 

+         function userDetails(selection) {
+           var detailSection = selection.selectAll('.detail-section').data([0]);
+           detailSection = detailSection.enter().append('div').attr('class', 'detail-section').merge(detailSection);
+           var osm = services.osm;
+           if (!osm) return; // Add warning if user is not logged in

 
 

-           entityEditor.modified = function(val) {
-               if (!arguments.length) { return _modified; }
-               _modified = val;
-               return entityEditor;
-           };
-
-
-           entityEditor.state = function(val) {
-               if (!arguments.length) { return _state; }
-               _state = val;
-               return entityEditor;
-           };
+           var hasAuth = osm.authenticated();
+           var authWarning = detailSection.selectAll('.auth-warning').data(hasAuth ? [] : [0]);
+           authWarning.exit().transition().duration(200).style('opacity', 0).remove();
+           var authEnter = authWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning auth-warning').style('opacity', 0);
+           authEnter.call(svgIcon('#iD-icon-alert', 'inline'));
+           authEnter.append('span').html(_t.html('note.login'));
+           authEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('login')).on('click.note-login', function (d3_event) {
+             d3_event.preventDefault();
+             osm.authenticate();
+           });
+           authEnter.transition().duration(200).style('opacity', 1);
+           var prose = detailSection.selectAll('.note-save-prose').data(hasAuth ? [0] : []);
+           prose.exit().remove();
+           prose = prose.enter().append('p').attr('class', 'note-save-prose').html(_t.html('note.upload_explanation')).merge(prose);
+           osm.userDetails(function (err, user) {
+             if (err) return;
+             var userLink = select(document.createElement('div'));
+
+             if (user.image_url) {
+               userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+             }

 
 

+             userLink.append('a').attr('class', 'user-info').html(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
+             prose.html(_t.html('note.upload_explanation_with_user', {
+               user: userLink.html()
+             }));
+           });
+         }

 
 

-           entityEditor.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) { return entityEditor; }  // exit early if no change
+         function noteSaveButtons(selection) {
+           var osm = services.osm;
+           var hasAuth = osm && osm.authenticated();

 
 

-               _entityIDs = val;
-               _base = context.graph();
-               _coalesceChanges = false;
+           var isSelected = _note && _note.id === context.selectedNoteID();

 
 

-               loadActivePresets(true);
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
+             return d.status + d.id;
+           }); // exit

 
 

-               return entityEditor
-                   .modified(false);
-           };
+           buttonSection.exit().remove(); // enter

 
 

+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');

 
 

-           entityEditor.newFeature = function(val) {
-               if (!arguments.length) { return _newFeature; }
-               _newFeature = val;
-               return entityEditor;
-           };
+           if (_note.isNew()) {
+             buttonEnter.append('button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
+             buttonEnter.append('button').attr('class', 'button save-button action').html(_t.html('note.save'));
+           } else {
+             buttonEnter.append('button').attr('class', 'button status-button action');
+             buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('note.comment'));
+           } // update

 
 
 
 

-           function loadActivePresets(isForNewSelection) {
+           buttonSection = buttonSection.merge(buttonEnter);
+           buttonSection.select('.cancel-button') // select and propagate data
+           .on('click.cancel', clickCancel);
+           buttonSection.select('.save-button') // select and propagate data
+           .attr('disabled', isSaveDisabled).on('click.save', clickSave);
+           buttonSection.select('.status-button') // select and propagate data
+           .attr('disabled', hasAuth ? null : true).html(function (d) {
+             var action = d.status === 'open' ? 'close' : 'open';
+             var andComment = d.newComment ? '_comment' : '';
+             return _t('note.' + action + andComment);
+           }).on('click.status', clickStatus);
+           buttonSection.select('.comment-button') // select and propagate data
+           .attr('disabled', isSaveDisabled).on('click.comment', clickComment);

 
 

-               var graph = context.graph();
+           function isSaveDisabled(d) {
+             return hasAuth && d.status === 'open' && d.newComment ? null : true;
+           }
+         }

 
 

-               var counts = {};
+         function clickCancel(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641

 
 

-               for (var i in _entityIDs) {
-                   var entity = graph.hasEntity(_entityIDs[i]);
-                   if (!entity) { return; }
+           var osm = services.osm;

 
 

-                   var match = _mainPresetIndex.match(entity, graph);
+           if (osm) {
+             osm.removeNote(d);
+           }

 
 

-                   if (!counts[match.id]) { counts[match.id] = 0; }
-                   counts[match.id] += 1;
-               }
+           context.enter(modeBrowse(context));
+           dispatch.call('change');
+         }

 
 

-               var matches = Object.keys(counts).sort(function(p1, p2) {
-                   return counts[p2] - counts[p1];
-               }).map(function(pID) {
-                   return _mainPresetIndex.item(pID);
-               });
+         function clickSave(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641

 
 

-               if (!isForNewSelection) {
-                   // A "weak" preset doesn't set any tags. (e.g. "Address")
-                   var weakPreset = _activePresets.length === 1 &&
-                       !_activePresets[0].isFallback() &&
-                       Object.keys(_activePresets[0].addTags || {}).length === 0;
-                   // Don't replace a weak preset with a fallback preset (e.g. "Point")
-                   if (weakPreset && matches.length === 1 && matches[0].isFallback()) { return; }
-               }
+           var osm = services.osm;

 
 

-               entityEditor.presets(matches);
+           if (osm) {
+             osm.postNoteCreate(d, function (err, note) {
+               dispatch.call('change', note);
+             });

            }
            }

+         }

 
 

-           entityEditor.presets = function(val) {
-               if (!arguments.length) { return _activePresets; }
-
-               // don't reload the same preset
-               if (!utilArrayIdentical(val, _activePresets)) {
-                   _activePresets = val;
-               }
-               return entityEditor;
-           };
-
-           return utilRebind(entityEditor, dispatch$1, 'on');
-       }
-
-       function uiPresetList(context) {
-           var dispatch$1 = dispatch('cancel', 'choose');
-           var _entityIDs;
-           var _currentPresets;
-           var _autofocus = false;
+         function clickStatus(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641

 
 

+           var osm = services.osm;

 
 

-           function presetList(selection) {
-               if (!_entityIDs) { return; }
+           if (osm) {
+             var setStatus = d.status === 'open' ? 'closed' : 'open';
+             osm.postNoteUpdate(d, setStatus, function (err, note) {
+               dispatch.call('change', note);
+             });
+           }
+         }

 
 

-               var presets = _mainPresetIndex.matchAllGeometry(entityGeometries());
+         function clickComment(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641

 
 

-               selection.html('');
+           var osm = services.osm;

 
 

-               var messagewrap = selection
-                   .append('div')
-                   .attr('class', 'header fillL');
-
-               var message = messagewrap
-                   .append('h3')
-                   .text(_t('inspector.choose'));
-
-               messagewrap
-                   .append('button')
-                   .attr('class', 'preset-choose')
-                   .on('click', function() { dispatch$1.call('cancel', this); })
-                   .call(svgIcon((_mainLocalizer.textDirection() === 'rtl') ? '#iD-icon-backward' : '#iD-icon-forward'));
-
-               function initialKeydown() {
-                   // hack to let delete shortcut work when search is autofocused
-                   if (search.property('value').length === 0 &&
-                       (event.keyCode === utilKeybinding.keyCodes['⌫'] ||
-                        event.keyCode === utilKeybinding.keyCodes['⌦'])) {
-                       event.preventDefault();
-                       event.stopPropagation();
-                       operationDelete(context, _entityIDs)();
-
-                   // hack to let undo work when search is autofocused
-                   } else if (search.property('value').length === 0 &&
-                       (event.ctrlKey || event.metaKey) &&
-                       event.keyCode === utilKeybinding.keyCodes.z) {
-                       event.preventDefault();
-                       event.stopPropagation();
-                       context.undo();
-                   } else if (!event.ctrlKey && !event.metaKey) {
-                       // don't check for delete/undo hack on future keydown events
-                       select(this).on('keydown', keydown);
-                       keydown.call(this);
-                   }
-               }
+           if (osm) {
+             osm.postNoteUpdate(d, d.status, function (err, note) {
+               dispatch.call('change', note);
+             });
+           }
+         }

 
 

-               function keydown() {
-                   // down arrow
-                   if (event.keyCode === utilKeybinding.keyCodes['↓'] &&
-                       // if insertion point is at the end of the string
-                       search.node().selectionStart === search.property('value').length) {
-                       event.preventDefault();
-                       event.stopPropagation();
-                       // move focus to the first item in the preset list
-                       var buttons = list.selectAll('.preset-list-button');
-                       if (!buttons.empty()) { buttons.nodes()[0].focus(); }
-                   }
-               }
+         noteEditor.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteEditor;
+         };

 
 

-               function keypress() {
-                   // enter
-                   var value = search.property('value');
-                   if (event.keyCode === 13 && value.length) {
-                       list.selectAll('.preset-list-item:first-child')
-                           .each(function(d) { d.choose.call(this); });
-                   }
-               }
+         noteEditor.newNote = function (val) {
+           if (!arguments.length) return _newNote;
+           _newNote = val;
+           return noteEditor;
+         };

 
 

-               function inputevent() {
-                   var value = search.property('value');
-                   list.classed('filtered', value.length);
-                   var extent = combinedEntityExtent();
-                   var results, messageText;
-                   if (value.length && extent) {
-                       var center = extent.center();
-                       var countryCode = iso1A2Code(center);
+         return utilRebind(noteEditor, dispatch, 'on');
+       }

 
 

-                       results = presets.search(value, entityGeometries()[0], countryCode && countryCode.toLowerCase());
-                       messageText = _t('inspector.results', {
-                           n: results.collection.length,
-                           search: value
-                       });
-                   } else {
-                       results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro());
-                       messageText = _t('inspector.choose');
-                   }
-                   list.call(drawList, results);
-                   message.text(messageText);
-               }
+       function uiSidebar(context) {
+         var inspector = uiInspector(context);
+         var dataEditor = uiDataEditor(context);
+         var noteEditor = uiNoteEditor(context);
+         var improveOsmEditor = uiImproveOsmEditor(context);
+         var keepRightEditor = uiKeepRightEditor(context);
+         var osmoseEditor = uiOsmoseEditor(context);

 
 

-               var searchWrap = selection
-                   .append('div')
-                   .attr('class', 'search-header');
+         var _current;

 
 

-               var search = searchWrap
-                   .append('input')
-                   .attr('class', 'preset-search-input')
-                   .attr('placeholder', _t('inspector.search'))
-                   .attr('type', 'search')
-                   .call(utilNoAuto)
-                   .on('keydown', initialKeydown)
-                   .on('keypress', keypress)
-                   .on('input', inputevent);
+         var _wasData = false;
+         var _wasNote = false;
+         var _wasQaItem = false; // use pointer events on supported platforms; fallback to mouse events

 
 

-               searchWrap
-                   .call(svgIcon('#iD-icon-search', 'pre-text'));
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

 
 

-               if (_autofocus) {
-                   search.node().focus();
+         function sidebar(selection) {
+           var container = context.container();
+           var minWidth = 240;
+           var sidebarWidth;
+           var containerWidth;
+           var dragOffset; // Set the initial width constraints
+
+           selection.style('min-width', minWidth + 'px').style('max-width', '400px').style('width', '33.3333%');
+           var resizer = selection.append('div').attr('class', 'sidebar-resizer').on(_pointerPrefix + 'down.sidebar-resizer', pointerdown);
+           var downPointerId, lastClientX, containerLocGetter;
+
+           function pointerdown(d3_event) {
+             if (downPointerId) return;
+             if ('button' in d3_event && d3_event.button !== 0) return;
+             downPointerId = d3_event.pointerId || 'mouse';
+             lastClientX = d3_event.clientX;
+             containerLocGetter = utilFastMouse(container.node()); // offset from edge of sidebar-resizer
+
+             dragOffset = utilFastMouse(resizer.node())(d3_event)[0] - 1;
+             sidebarWidth = selection.node().getBoundingClientRect().width;
+             containerWidth = container.node().getBoundingClientRect().width;
+             var widthPct = sidebarWidth / containerWidth * 100;
+             selection.style('width', widthPct + '%') // lock in current width
+             .style('max-width', '85%'); // but allow larger widths
+
+             resizer.classed('dragging', true);
+             select(window).on('touchmove.sidebar-resizer', function (d3_event) {
+               // disable page scrolling while resizing on touch input
+               d3_event.preventDefault();
+             }, {
+               passive: false
+             }).on(_pointerPrefix + 'move.sidebar-resizer', pointermove).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', pointerup);
+           }
+
+           function pointermove(d3_event) {
+             if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
+             d3_event.preventDefault();
+             var dx = d3_event.clientX - lastClientX;
+             lastClientX = d3_event.clientX;
+             var isRTL = _mainLocalizer.textDirection() === 'rtl';
+             var scaleX = isRTL ? 0 : 1;
+             var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+             var x = containerLocGetter(d3_event)[0] - dragOffset;
+             sidebarWidth = isRTL ? containerWidth - x : x;
+             var isCollapsed = selection.classed('collapsed');
+             var shouldCollapse = sidebarWidth < minWidth;
+             selection.classed('collapsed', shouldCollapse);
+
+             if (shouldCollapse) {
+               if (!isCollapsed) {
+                 selection.style(xMarginProperty, '-400px').style('width', '400px');
+                 context.ui().onResize([(sidebarWidth - dx) * scaleX, 0]);

                }
                }

+             } else {
+               var widthPct = sidebarWidth / containerWidth * 100;
+               selection.style(xMarginProperty, null).style('width', widthPct + '%');

 
 

-               var listWrap = selection
-                   .append('div')
-                   .attr('class', 'inspector-body');
-
-               var list = listWrap
-                   .append('div')
-                   .attr('class', 'preset-list')
-                   .call(drawList, _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro()));
-
-               context.features().on('change.preset-list', updateForFeatureHiddenState);
+               if (isCollapsed) {
+                 context.ui().onResize([-sidebarWidth * scaleX, 0]);
+               } else {
+                 context.ui().onResize([-dx * scaleX, 0]);
+               }
+             }

            }
 
            }
 

+           function pointerup(d3_event) {
+             if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
+             downPointerId = null;
+             resizer.classed('dragging', false);
+             select(window).on('touchmove.sidebar-resizer', null).on(_pointerPrefix + 'move.sidebar-resizer', null).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', null);
+           }

 
 

-           function drawList(list, presets) {
-               presets = presets.matchAllGeometry(entityGeometries());
-               var collection = presets.collection.reduce(function(collection, preset) {
-                   if (!preset) { return collection; }
-
-                   if (preset.members) {
-                       if (preset.members.collection.filter(function(preset) {
-                           return preset.addable();
-                       }).length > 1) {
-                           collection.push(CategoryItem(preset));
-                       }
-                   } else if (preset.addable()) {
-                       collection.push(PresetItem(preset));
-                   }
-                   return collection;
-               }, []);
-
-               var items = list.selectAll('.preset-list-item')
-                   .data(collection, function(d) { return d.preset.id; });
+           var featureListWrap = selection.append('div').attr('class', 'feature-list-pane').call(uiFeatureList(context));
+           var inspectorWrap = selection.append('div').attr('class', 'inspector-hidden inspector-wrap');

 
 

-               items.order();
+           var hoverModeSelect = function hoverModeSelect(targets) {
+             context.container().selectAll('.feature-list-item button').classed('hover', false);

 
 

-               items.exit()
-                   .remove();
+             if (context.selectedIDs().length > 1 && targets && targets.length) {
+               var elements = context.container().selectAll('.feature-list-item button').filter(function (node) {
+                 return targets.indexOf(node) !== -1;
+               });

 
 

-               items.enter()
-                   .append('div')
-                   .attr('class', function(item) { return 'preset-list-item preset-' + item.preset.id.replace('/', '-'); })
-                   .classed('current', function(item) { return _currentPresets.indexOf(item.preset) !== -1; })
-                   .each(function(item) { select(this).call(item); })
-                   .style('opacity', 0)
-                   .transition()
-                   .style('opacity', 1);
-
-               updateForFeatureHiddenState();
-           }
-
-           function itemKeydown(){
-               // the actively focused item
-               var item = select(this.closest('.preset-list-item'));
-               var parentItem = select(item.node().parentNode.closest('.preset-list-item'));
-
-               // arrow down, move focus to the next, lower item
-               if (event.keyCode === utilKeybinding.keyCodes['↓']) {
-                   event.preventDefault();
-                   event.stopPropagation();
-                   // the next item in the list at the same level
-                   var nextItem = select(item.node().nextElementSibling);
-                   // if there is no next item in this list
-                   if (nextItem.empty()) {
-                       // if there is a parent item
-                       if (!parentItem.empty()) {
-                           // the item is the last item of a sublist,
-                           // select the next item at the parent level
-                           nextItem = select(parentItem.node().nextElementSibling);
-                       }
-                   // if the focused item is expanded
-                   } else if (select(this).classed('expanded')) {
-                       // select the first subitem instead
-                       nextItem = item.select('.subgrid .preset-list-item:first-child');
-                   }
-                   if (!nextItem.empty()) {
-                       // focus on the next item
-                       nextItem.select('.preset-list-button').node().focus();
-                   }
+               if (!elements.empty()) {
+                 elements.classed('hover', true);
+               }
+             }
+           };

 
 

-               // arrow up, move focus to the previous, higher item
-               } else if (event.keyCode === utilKeybinding.keyCodes['↑']) {
-                   event.preventDefault();
-                   event.stopPropagation();
-                   // the previous item in the list at the same level
-                   var previousItem = select(item.node().previousElementSibling);
-
-                   // if there is no previous item in this list
-                   if (previousItem.empty()) {
-                       // if there is a parent item
-                       if (!parentItem.empty()) {
-                           // the item is the first subitem of a sublist select the parent item
-                           previousItem = parentItem;
-                       }
-                   // if the previous item is expanded
-                   } else if (previousItem.select('.preset-list-button').classed('expanded')) {
-                       // select the last subitem of the sublist of the previous item
-                       previousItem = previousItem.select('.subgrid .preset-list-item:last-child');
-                   }
+           sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);

 
 

-                   if (!previousItem.empty()) {
-                       // focus on the previous item
-                       previousItem.select('.preset-list-button').node().focus();
-                   } else {
-                       // the focus is at the top of the list, move focus back to the search field
-                       var search = select(this.closest('.preset-list-pane')).select('.preset-search-input');
-                       search.node().focus();
-                   }
+           function hover(targets) {
+             var datum = targets && targets.length && targets[0];

 
 

-               // arrow left, move focus to the parent item if there is one
-               } else if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '→' : '←']) {
-                   event.preventDefault();
-                   event.stopPropagation();
-                   // if there is a parent item, focus on the parent item
-                   if (!parentItem.empty()) {
-                       parentItem.select('.preset-list-button').node().focus();
-                   }
+             if (datum && datum.__featurehash__) {
+               // hovering on data
+               _wasData = true;
+               sidebar.show(dataEditor.datum(datum));
+               selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+             } else if (datum instanceof osmNote) {
+               if (context.mode().id === 'drag-note') return;
+               _wasNote = true;
+               var osm = services.osm;

 
 

-               // arrow right, choose this item
-               } else if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '←' : '→']) {
-                   event.preventDefault();
-                   event.stopPropagation();
-                   item.datum().choose.call(select(this).node());
+               if (osm) {
+                 datum = osm.getNote(datum.id); // marker may contain stale data - get latest

                }
                }

-           }

 
 

+               sidebar.show(noteEditor.note(datum));
+               selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+             } else if (datum instanceof QAItem) {
+               _wasQaItem = true;
+               var errService = services[datum.service];

 
 

-           function CategoryItem(preset) {
-               var box, sublist, shown = false;
+               if (errService) {
+                 // marker may contain stale data - get latest
+                 datum = errService.getError(datum.id);
+               } // Currently only three possible services

 
 

-               function item(selection) {
-                   var wrap = selection.append('div')
-                       .attr('class', 'preset-list-button-wrap category');

 
 

-                   function click() {
-                       var isExpanded = select(this).classed('expanded');
-                       var iconName = isExpanded ?
-                           (_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward') : '#iD-icon-down';
-                       select(this)
-                           .classed('expanded', !isExpanded);
-                       select(this).selectAll('div.label-inner svg.icon use')
-                           .attr('href', iconName);
-                       item.choose();
-                   }
+               var errEditor;

 
 

-                   var geometries = entityGeometries();
+               if (datum.service === 'keepRight') {
+                 errEditor = keepRightEditor;
+               } else if (datum.service === 'osmose') {
+                 errEditor = osmoseEditor;
+               } else {
+                 errEditor = improveOsmEditor;
+               }

 
 

-                   var button = wrap
-                       .append('button')
-                       .attr('class', 'preset-list-button')
-                       .classed('expanded', false)
-                       .call(uiPresetIcon()
-                           .geometry(geometries.length === 1 && geometries[0])
-                           .preset(preset))
-                       .on('click', click)
-                       .on('keydown', function() {
-                           // right arrow, expand the focused item
-                           if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '←' : '→']) {
-                               event.preventDefault();
-                               event.stopPropagation();
-                               // if the item isn't expanded
-                               if (!select(this).classed('expanded')) {
-                                   // toggle expansion (expand the item)
-                                   click.call(this);
-                               }
-                           // left arrow, collapse the focused item
-                           } else if (event.keyCode === utilKeybinding.keyCodes[(_mainLocalizer.textDirection() === 'rtl') ? '→' : '←']) {
-                               event.preventDefault();
-                               event.stopPropagation();
-                               // if the item is expanded
-                               if (select(this).classed('expanded')) {
-                                   // toggle expansion (collapse the item)
-                                   click.call(this);
-                               }
-                           } else {
-                               itemKeydown.call(this);
-                           }
-                       });
+               context.container().selectAll('.qaItem.' + datum.service).classed('hover', function (d) {
+                 return d.id === datum.id;
+               });
+               sidebar.show(errEditor.error(datum));
+               selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+             } else if (!_current && datum instanceof osmEntity) {
+               featureListWrap.classed('inspector-hidden', true);
+               inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', true);
+
+               if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
+                 inspector.state('hover').entityIDs([datum.id]).newFeature(false);
+                 inspectorWrap.call(inspector);
+               }
+             } else if (!_current) {
+               featureListWrap.classed('inspector-hidden', false);
+               inspectorWrap.classed('inspector-hidden', true);
+               inspector.state('hide');
+             } else if (_wasData || _wasNote || _wasQaItem) {
+               _wasNote = false;
+               _wasData = false;
+               _wasQaItem = false;
+               context.container().selectAll('.note').classed('hover', false);
+               context.container().selectAll('.qaItem').classed('hover', false);
+               sidebar.hide();
+             }
+           }

 
 

-                   var label = button
-                       .append('div')
-                       .attr('class', 'label')
-                       .append('div')
-                       .attr('class', 'label-inner');
+           sidebar.hover = throttle(hover, 200);

 
 

-                   label
-                       .append('div')
-                       .attr('class', 'namepart')
-                       .call(svgIcon((_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'))
-                       .append('span')
-                       .html(function() { return preset.name() + '&hellip;'; });
+           sidebar.intersects = function (extent) {
+             var rect = selection.node().getBoundingClientRect();
+             return extent.intersects([context.projection.invert([0, rect.height]), context.projection.invert([rect.width, 0])]);
+           };

 
 

-                   box = selection.append('div')
-                       .attr('class', 'subgrid')
-                       .style('max-height', '0px')
-                       .style('opacity', 0);
+           sidebar.select = function (ids, newFeature) {
+             sidebar.hide();

 
 

-                   box.append('div')
-                       .attr('class', 'arrow');
+             if (ids && ids.length) {
+               var entity = ids.length === 1 && context.entity(ids[0]);

 
 

-                   sublist = box.append('div')
-                       .attr('class', 'preset-list fillL3');
+               if (entity && newFeature && selection.classed('collapsed')) {
+                 // uncollapse the sidebar
+                 var extent = entity.extent(context.graph());
+                 sidebar.expand(sidebar.intersects(extent));

                }
 
                }
 

+               featureListWrap.classed('inspector-hidden', true);
+               inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', false); // reload the UI even if the ids are the same since the entities
+               // themselves may have changed

 
 

-               item.choose = function() {
-                   if (!box || !sublist) { return; }
-
-                   if (shown) {
-                       shown = false;
-                       box.transition()
-                           .duration(200)
-                           .style('opacity', '0')
-                           .style('max-height', '0px')
-                           .style('padding-bottom', '0px');
-                   } else {
-                       shown = true;
-                       var members = preset.members.matchAllGeometry(entityGeometries());
-                       sublist.call(drawList, members);
-                       box.transition()
-                           .duration(200)
-                           .style('opacity', '1')
-                           .style('max-height', 200 + members.collection.length * 190 + 'px')
-                           .style('padding-bottom', '10px');
-                   }
-               };
-
-               item.preset = preset;
-               return item;
-           }
+               inspector.state('select').entityIDs(ids).newFeature(newFeature);
+               inspectorWrap.call(inspector);
+             } else {
+               inspector.state('hide');
+             }
+           };

 
 

+           sidebar.showPresetList = function () {
+             inspector.showList();
+           };

 
 

-           function PresetItem(preset) {
-               function item(selection) {
-                   var wrap = selection.append('div')
-                       .attr('class', 'preset-list-button-wrap');
+           sidebar.show = function (component, element) {
+             featureListWrap.classed('inspector-hidden', true);
+             inspectorWrap.classed('inspector-hidden', true);
+             if (_current) _current.remove();
+             _current = selection.append('div').attr('class', 'sidebar-component').call(component, element);
+           };

 
 

-                   var geometries = entityGeometries();
+           sidebar.hide = function () {
+             featureListWrap.classed('inspector-hidden', false);
+             inspectorWrap.classed('inspector-hidden', true);
+             if (_current) _current.remove();
+             _current = null;
+           };

 
 

-                   var button = wrap.append('button')
-                       .attr('class', 'preset-list-button')
-                       .call(uiPresetIcon()
-                           .geometry(geometries.length === 1 && geometries[0])
-                           .preset(preset))
-                       .on('click', item.choose)
-                       .on('keydown', itemKeydown);
+           sidebar.expand = function (moveMap) {
+             if (selection.classed('collapsed')) {
+               sidebar.toggle(moveMap);
+             }
+           };

 
 

-                   var label = button
-                       .append('div')
-                       .attr('class', 'label')
-                       .append('div')
-                       .attr('class', 'label-inner');
+           sidebar.collapse = function (moveMap) {
+             if (!selection.classed('collapsed')) {
+               sidebar.toggle(moveMap);
+             }
+           };

 
 

-                   // NOTE: split/join on en-dash, not a hypen (to avoid conflict with fr - nl names in Brussels etc)
-                   label.selectAll('.namepart')
-                       .data(preset.name().split(' – '))
-                       .enter()
-                       .append('div')
-                       .attr('class', 'namepart')
-                       .text(function(d) { return d; });
+           sidebar.toggle = function (moveMap) {
+             // Don't allow sidebar to toggle when the user is in the walkthrough.
+             if (context.inIntro()) return;
+             var isCollapsed = selection.classed('collapsed');
+             var isCollapsing = !isCollapsed;
+             var isRTL = _mainLocalizer.textDirection() === 'rtl';
+             var scaleX = isRTL ? 0 : 1;
+             var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+             sidebarWidth = selection.node().getBoundingClientRect().width; // switch from % to px

 
 

-                   wrap.call(item.reference.button);
-                   selection.call(item.reference.body);
-               }
+             selection.style('width', sidebarWidth + 'px');
+             var startMargin, endMargin, lastMargin;

 
 

-               item.choose = function() {
-                   if (select(this).classed('disabled')) { return; }
-                   if (!context.inIntro()) {
-                       _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
-                   }
-                   context.perform(
-                       function(graph) {
-                           for (var i in _entityIDs) {
-                               var entityID = _entityIDs[i];
-                               var oldPreset = _mainPresetIndex.match(graph.entity(entityID), graph);
-                               graph = actionChangePreset(entityID, oldPreset, preset)(graph);
-                           }
-                           return graph;
-                       },
-                       _t('operations.change_tags.annotation')
-                   );
+             if (isCollapsing) {
+               startMargin = lastMargin = 0;
+               endMargin = -sidebarWidth;
+             } else {
+               startMargin = lastMargin = -sidebarWidth;
+               endMargin = 0;
+             }

 
 

-                   context.validator().validate();  // rerun validation
-                   dispatch$1.call('choose', this, preset);
-               };
+             if (!isCollapsing) {
+               // unhide the sidebar's content before it transitions onscreen
+               selection.classed('collapsed', isCollapsing);
+             }

 
 

-               item.help = function() {
-                   event.stopPropagation();
-                   item.reference.toggle();
+             selection.transition().style(xMarginProperty, endMargin + 'px').tween('panner', function () {
+               var i = d3_interpolateNumber(startMargin, endMargin);
+               return function (t) {
+                 var dx = lastMargin - Math.round(i(t));
+                 lastMargin = lastMargin - dx;
+                 context.ui().onResize(moveMap ? undefined : [dx * scaleX, 0]);

                };
                };

+             }).on('end', function () {
+               if (isCollapsing) {
+                 // hide the sidebar's content after it transitions offscreen
+                 selection.classed('collapsed', isCollapsing);
+               } // switch back from px to %

 
 

-               item.preset = preset;
-               item.reference = uiTagReference(preset.reference(entityGeometries()[0]));

 
 

-               return item;
-           }
+               if (!isCollapsing) {
+                 var containerWidth = container.node().getBoundingClientRect().width;
+                 var widthPct = sidebarWidth / containerWidth * 100;
+                 selection.style(xMarginProperty, null).style('width', widthPct + '%');
+               }
+             });
+           }; // toggle the sidebar collapse when double-clicking the resizer

 
 
 
 

-           function updateForFeatureHiddenState() {
-               if (!_entityIDs.every(context.hasEntity)) { return; }
+           resizer.on('dblclick', function (d3_event) {
+             d3_event.preventDefault();

 
 

-               var geometries = entityGeometries();
-               var button = context.container().selectAll('.preset-list .preset-list-button');
+             if (d3_event.sourceEvent) {
+               d3_event.sourceEvent.preventDefault();
+             }

 
 

-               // remove existing tooltips
-               button.call(uiTooltip().destroyAny);
+             sidebar.toggle();
+           }); // ensure hover sidebar is closed when zooming out beyond editable zoom

 
 

-               button.each(function(item, index) {
-                   var hiddenPresetFeaturesId;
-                   for (var i in geometries) {
-                       hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
-                       if (hiddenPresetFeaturesId) { break; }
-                   }
-                   var isHiddenPreset = !context.inIntro() &&
-                       !!hiddenPresetFeaturesId &&
-                       (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
-
-                   select(this)
-                       .classed('disabled', isHiddenPreset);
-
-                   if (isHiddenPreset) {
-                       var isAutoHidden = context.features().autoHidden(hiddenPresetFeaturesId);
-                       var tooltipIdSuffix = isAutoHidden ? 'zoom' : 'manual';
-                       var tooltipObj = { features: _t('feature.' + hiddenPresetFeaturesId + '.description') };
-                       select(this).call(uiTooltip()
-                           .title(_t('inspector.hidden_preset.' + tooltipIdSuffix, tooltipObj))
-                           .placement(index < 2 ? 'bottom' : 'top')
-                       );
-                   }
-               });
-           }
+           context.map().on('crossEditableZoom.sidebar', function (within) {
+             if (!within && !selection.select('.inspector-hover').empty()) {
+               hover([]);
+             }
+           });
+         }

 
 

-           presetList.autofocus = function(val) {
-               if (!arguments.length) { return _autofocus; }
-               _autofocus = val;
-               return presetList;
-           };
+         sidebar.showPresetList = function () {};

 
 

-           presetList.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               _entityIDs = val;
-               if (_entityIDs && _entityIDs.length) {
-                   var presets = _entityIDs.map(function(entityID) {
-                       return _mainPresetIndex.match(context.entity(entityID), context.graph());
-                   });
-                   presetList.presets(presets);
-               }
-               return presetList;
-           };
+         sidebar.hover = function () {};

 
 

-           presetList.presets = function(val) {
-               if (!arguments.length) { return _currentPresets; }
-               _currentPresets = val;
-               return presetList;
-           };
+         sidebar.hover.cancel = function () {};

 
 

-           function entityGeometries() {
+         sidebar.intersects = function () {};

 
 

-               var counts = {};
+         sidebar.select = function () {};

 
 

-               for (var i in _entityIDs) {
-                   var entityID = _entityIDs[i];
-                   var entity = context.entity(entityID);
-                   var geometry = entity.geometry(context.graph());
+         sidebar.show = function () {};

 
 

-                   // Treat entities on addr:interpolation lines as points, not vertices (#3241)
-                   if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
-                       geometry = 'point';
-                   }
+         sidebar.hide = function () {};

 
 

-                   if (!counts[geometry]) { counts[geometry] = 0; }
-                   counts[geometry] += 1;
-               }
+         sidebar.expand = function () {};

 
 

-               return Object.keys(counts).sort(function(geom1, geom2) {
-                   return counts[geom2] - counts[geom1];
-               });
-           }
+         sidebar.collapse = function () {};

 
 

-           function combinedEntityExtent() {
-               return _entityIDs.reduce(function(extent, entityID) {
-                   var entity = context.graph().entity(entityID);
-                   return extent.extend(entity.extent(context.graph()));
-               }, geoExtent());
-           }
+         sidebar.toggle = function () {};

 
 

-           return utilRebind(presetList, dispatch$1, 'on');
+         return sidebar;

        }
 
        }
 

-       function uiInspector(context) {
-           var presetList = uiPresetList(context);
-           var entityEditor = uiEntityEditor(context);
-           var wrap = select(null),
-               presetPane = select(null),
-               editorPane = select(null);
-           var _state = 'select';
-           var _entityIDs;
-           var _newFeature = false;
-
-
-           function inspector(selection) {
-               presetList
-                   .entityIDs(_entityIDs)
-                   .autofocus(_newFeature)
-                   .on('choose', inspector.setPreset)
-                   .on('cancel', function() {
-                       wrap.transition()
-                           .styleTween('right', function() { return interpolate('-100%', '0%'); });
-                       editorPane.call(entityEditor);
-                   });
-
-               entityEditor
-                   .state(_state)
-                   .entityIDs(_entityIDs)
-                   .on('choose', inspector.showList);
+       function uiSourceSwitch(context) {
+         var keys;

 
 

-               wrap = selection.selectAll('.panewrap')
-                   .data([0]);
+         function click(d3_event) {
+           d3_event.preventDefault();
+           var osm = context.connection();
+           if (!osm) return;
+           if (context.inIntro()) return;
+           if (context.history().hasChanges() && !window.confirm(_t('source_switch.lose_changes'))) return;
+           var isLive = select(this).classed('live');
+           isLive = !isLive;
+           context.enter(modeBrowse(context));
+           context.history().clearSaved(); // remove saved history

 
 

-               var enter = wrap.enter()
-                   .append('div')
-                   .attr('class', 'panewrap');
+           context.flush(); // remove stored data

 
 

-               enter
-                   .append('div')
-                   .attr('class', 'preset-list-pane pane');
+           select(this).html(isLive ? _t.html('source_switch.live') : _t.html('source_switch.dev')).classed('live', isLive).classed('chip', isLive);
+           osm["switch"](isLive ? keys[0] : keys[1]); // switch connection (warning: dispatches 'change' event)
+         }

 
 

-               enter
-                   .append('div')
-                   .attr('class', 'entity-editor-pane pane');
+         var sourceSwitch = function sourceSwitch(selection) {
+           selection.append('a').attr('href', '#').html(_t.html('source_switch.live')).attr('class', 'live chip').on('click', click);
+         };

 
 

-               wrap = wrap.merge(enter);
-               presetPane = wrap.selectAll('.preset-list-pane');
-               editorPane = wrap.selectAll('.entity-editor-pane');
+         sourceSwitch.keys = function (_) {
+           if (!arguments.length) return keys;
+           keys = _;
+           return sourceSwitch;
+         };

 
 

-               function shouldDefaultToPresetList() {
-                   // always show the inspector on hover
-                   if (_state !== 'select') { return false; }
+         return sourceSwitch;
+       }

 
 

-                   // can only change preset on single selection
-                   if (_entityIDs.length !== 1) { return false; }
+       function uiSpinner(context) {
+         var osm = context.connection();
+         return function (selection) {
+           var img = selection.append('img').attr('src', context.imagePath('loader-black.gif')).style('opacity', 0);

 
 

-                   var entityID = _entityIDs[0];
-                   var entity = context.hasEntity(entityID);
-                   if (!entity) { return false; }
+           if (osm) {
+             osm.on('loading.spinner', function () {
+               img.transition().style('opacity', 1);
+             }).on('loaded.spinner', function () {
+               img.transition().style('opacity', 0);
+             });
+           }
+         };
+       }

 
 

-                   // default to inspector if there are already tags
-                   if (entity.hasNonGeometryTags()) { return false; }
+       function uiSplash(context) {
+         return function (selection) {
+           // Exception - if there are restorable changes, skip this splash screen.
+           // This is because we currently only support one `uiModal` at a time
+           //  and we need to show them `uiRestore`` instead of this one.
+           if (context.history().hasRestorableChanges()) return; // If user has not seen this version of the privacy policy, show the splash again.

 
 

-                   // prompt to select preset if feature is new and untagged
-                   if (_newFeature) { return true; }
+           var updateMessage = '';
+           var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
+           var showSplash = !corePreferences('sawSplash');

 
 

-                   // all existing features except vertices should default to inspector
-                   if (entity.geometry(context.graph()) !== 'vertex') { return false; }
+           if (sawPrivacyVersion !== context.privacyVersion) {
+             updateMessage = _t('splash.privacy_update');
+             showSplash = true;
+           }

 
 

-                   // show vertex relations if any
-                   if (context.graph().parentRelations(entity).length) { return false; }
+           if (!showSplash) return;
+           corePreferences('sawSplash', true);
+           corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen

 
 

-                   // show vertex issues if there are any
-                   if (context.validator().getEntityIssues(entityID).length) { return false; }
+           _mainFileFetcher.get('intro_graph');
+           var modalSelection = uiModal(selection);
+           modalSelection.select('.modal').attr('class', 'modal-splash modal');
+           var introModal = modalSelection.select('.content').append('div').attr('class', 'fillL');
+           introModal.append('div').attr('class', 'modal-section').append('h3').html(_t.html('splash.welcome'));
+           var modalSection = introModal.append('div').attr('class', 'modal-section');
+           modalSection.append('p').html(_t.html('splash.text', {
+             version: context.version,
+             website: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/develop/CHANGELOG.md#whats-new">changelog</a>',
+             github: '<a target="_blank" href="https://github.com/openstreetmap/iD/issues">github.com</a>'
+           }));
+           modalSection.append('p').html(_t.html('splash.privacy', {
+             updateMessage: updateMessage,
+             privacyLink: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/release/PRIVACY.md">' + _t('splash.privacy_policy') + '</a>'
+           }));
+           var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
+           var walkthrough = buttonWrap.append('button').attr('class', 'walkthrough').on('click', function () {
+             context.container().call(uiIntro(context));
+             modalSelection.close();
+           });
+           walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+           walkthrough.append('div').html(_t.html('splash.walkthrough'));
+           var startEditing = buttonWrap.append('button').attr('class', 'start-editing').on('click', modalSelection.close);
+           startEditing.append('svg').attr('class', 'logo logo-features').append('use').attr('xlink:href', '#iD-logo-features');
+           startEditing.append('div').html(_t.html('splash.start'));
+           modalSelection.select('button.close').attr('class', 'hide');
+         };
+       }

 
 

-                   // show turn retriction editor for junction vertices
-                   if (entity.isHighwayIntersection(context.graph())) { return false; }
+       function uiStatus(context) {
+         var osm = context.connection();
+         return function (selection) {
+           if (!osm) return;

 
 

-                   // otherwise show preset list for uninteresting vertices
-                   return true;
-               }
+           function update(err, apiStatus) {
+             selection.html('');

 
 

-               if (shouldDefaultToPresetList()) {
-                   wrap.style('right', '-100%');
-                   presetPane.call(presetList);
+             if (err) {
+               if (apiStatus === 'connectionSwitched') {
+                 // if the connection was just switched, we can't rely on
+                 // the status (we're getting the status of the previous api)
+                 return;
+               } else if (apiStatus === 'rateLimited') {
+                 selection.html(_t.html('osm_api_status.message.rateLimit')).append('a').attr('href', '#').attr('class', 'api-status-login').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('login')).on('click.login', function (d3_event) {
+                   d3_event.preventDefault();
+                   osm.authenticate();
+                 });

                } else {
                } else {

-                   wrap.style('right', '0%');
-                   editorPane.call(entityEditor);
-               }
+                 // don't allow retrying too rapidly
+                 var throttledRetry = throttle(function () {
+                   // try loading the visible tiles
+                   context.loadTiles(context.projection); // manually reload the status too in case all visible tiles were already loaded

 
 

-               var footer = selection.selectAll('.footer')
-                   .data([0]);
+                   osm.reloadApiStatus();
+                 }, 2000); // eslint-disable-next-line no-warning-comments
+                 // TODO: nice messages for different error types

 
 

-               footer = footer.enter()
-                   .append('div')
-                   .attr('class', 'footer')
-                   .merge(footer);

 
 

-               footer
-                   .call(uiViewOnOSM(context)
-                       .what(context.hasEntity(_entityIDs.length === 1 && _entityIDs[0]))
-                   );
-           }
+                 selection.html(_t.html('osm_api_status.message.error') + ' ').append('a').attr('href', '#') // let the user manually retry their connection directly
+                 .html(_t.html('osm_api_status.retry')).on('click.retry', function (d3_event) {
+                   d3_event.preventDefault();
+                   throttledRetry();
+                 });
+               }
+             } else if (apiStatus === 'readonly') {
+               selection.html(_t.html('osm_api_status.message.readonly'));
+             } else if (apiStatus === 'offline') {
+               selection.html(_t.html('osm_api_status.message.offline'));
+             }

 
 

-           inspector.showList = function(presets) {
+             selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
+           }

 
 

-               wrap.transition()
-                   .styleTween('right', function() { return interpolate('0%', '-100%'); });
+           osm.on('apiStatusChange.uiStatus', update);
+           context.history().on('storage_error', function () {
+             selection.html(_t.html('osm_api_status.message.local_storage_full'));
+             selection.attr('class', 'api-status error');
+           }); // reload the status periodically regardless of other factors

 
 

-               if (presets) {
-                   presetList.presets(presets);
-               }
+           window.setInterval(function () {
+             osm.reloadApiStatus();
+           }, 90000); // load the initial status in case no OSM data was loaded yet

 
 

-               presetPane
-                   .call(presetList.autofocus(true));
-           };
+           osm.reloadApiStatus();
+         };
+       }

 
 

-           inspector.setPreset = function(preset) {
+       function modeDrawArea(context, wayID, startGraph, button) {
+         var mode = {
+           button: button,
+           id: 'draw-area'
+         };
+         var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawArea', function () {
+           context.ui().flash.iconName('#iD-icon-no').label(_t('self_intersection.error.areas'))();
+         });
+         mode.wayID = wayID;

 
 

-               // upon setting multipolygon, go to the area preset list instead of the editor
-               if (preset.id === 'type/multipolygon') {
-                   presetPane
-                       .call(presetList.autofocus(true));
+         mode.enter = function () {
+           context.install(behavior);
+         };

 
 

-               } else {
-                   wrap.transition()
-                       .styleTween('right', function() { return interpolate('-100%', '0%'); });
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };

 
 

-                   editorPane
-                       .call(entityEditor.presets([preset]));
-               }
+         mode.selectedIDs = function () {
+           return [wayID];
+         };

 
 

-           };
+         mode.activeID = function () {
+           return behavior && behavior.activeID() || [];
+         };

 
 

-           inspector.state = function(val) {
-               if (!arguments.length) { return _state; }
-               _state = val;
-               entityEditor.state(_state);
+         return mode;
+       }

 
 

-               // remove any old field help overlay that might have gotten attached to the inspector
-               context.container().selectAll('.field-help-body').remove();
+       function modeAddArea(context, mode) {
+         mode.id = 'add-area';
+         var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
+         var defaultTags = {
+           area: 'yes'
+         };
+         if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'area');

 
 

-               return inspector;
+         function actionClose(wayId) {
+           return function (graph) {
+             return graph.replace(graph.entity(wayId).close());

            };
            };

+         }

 
 

+         function start(loc) {
+           var startGraph = context.graph();
+           var node = osmNode({
+             loc: loc
+           });
+           var way = osmWay({
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
+           context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+         }

 
 

-           inspector.entityIDs = function(val) {
-               if (!arguments.length) { return _entityIDs; }
-               _entityIDs = val;
-               return inspector;
-           };
+         function startFromWay(loc, edge) {
+           var startGraph = context.graph();
+           var node = osmNode({
+             loc: loc
+           });
+           var way = osmWay({
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id), actionAddMidpoint({
+             loc: loc,
+             edge: edge
+           }, node));
+           context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+         }

 
 

+         function startFromNode(node) {
+           var startGraph = context.graph();
+           var way = osmWay({
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
+           context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+         }

 
 

-           inspector.newFeature = function(val) {
-               if (!arguments.length) { return _newFeature; }
-               _newFeature = val;
-               return inspector;
-           };
+         mode.enter = function () {
+           context.install(behavior);
+         };

 
 

+         mode.exit = function () {
+           context.uninstall(behavior);
+         };

 
 

-           return inspector;
+         return mode;

        }
 
        }
 

-       function uiSidebar(context) {
-           var inspector = uiInspector(context);
-           var dataEditor = uiDataEditor(context);
-           var noteEditor = uiNoteEditor(context);
-           var improveOsmEditor = uiImproveOsmEditor(context);
-           var keepRightEditor = uiKeepRightEditor(context);
-           var osmoseEditor = uiOsmoseEditor(context);
-           var _current;
-           var _wasData = false;
-           var _wasNote = false;
-           var _wasQaItem = false;
-
-           // use pointer events on supported platforms; fallback to mouse events
-           var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
-
-
-           function sidebar(selection) {
-               var container = context.container();
-               var minWidth = 240;
-               var sidebarWidth;
-               var containerWidth;
-               var dragOffset;
-
-               // Set the initial width constraints
-               selection
-                   .style('min-width', minWidth + 'px')
-                   .style('max-width', '400px')
-                   .style('width', '33.3333%');
-
-               var resizer = selection
-                   .append('div')
-                   .attr('class', 'sidebar-resizer')
-                   .on(_pointerPrefix + 'down.sidebar-resizer', pointerdown);
+       function modeAddLine(context, mode) {
+         mode.id = 'add-line';
+         var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
+         var defaultTags = {};
+         if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'line');
+
+         function start(loc) {
+           var startGraph = context.graph();
+           var node = osmNode({
+             loc: loc
+           });
+           var way = osmWay({
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id));
+           context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+         }
+
+         function startFromWay(loc, edge) {
+           var startGraph = context.graph();
+           var node = osmNode({
+             loc: loc
+           });
+           var way = osmWay({
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionAddMidpoint({
+             loc: loc,
+             edge: edge
+           }, node));
+           context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+         }
+
+         function startFromNode(node) {
+           var startGraph = context.graph();
+           var way = osmWay({
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id));
+           context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+         }
+
+         mode.enter = function () {
+           context.install(behavior);
+         };

 
 

-               var downPointerId, lastClientX, containerLocGetter;
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };

 
 

-               function pointerdown() {
-                   if (downPointerId) { return; }
+         return mode;
+       }

 
 

-                   if ('button' in event && event.button !== 0) { return; }
+       function modeAddPoint(context, mode) {
+         mode.id = 'add-point';
+         var behavior = behaviorDraw(context).on('click', add).on('clickWay', addWay).on('clickNode', addNode).on('cancel', cancel).on('finish', cancel);
+         var defaultTags = {};
+         if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'point');
+
+         function add(loc) {
+           var node = osmNode({
+             loc: loc,
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(node), _t('operations.add.annotation.point'));
+           enterSelectMode(node);
+         }

 
 

-                   downPointerId = event.pointerId || 'mouse';
+         function addWay(loc, edge) {
+           var node = osmNode({
+             tags: defaultTags
+           });
+           context.perform(actionAddMidpoint({
+             loc: loc,
+             edge: edge
+           }, node), _t('operations.add.annotation.vertex'));
+           enterSelectMode(node);
+         }

 
 

-                   lastClientX = event.clientX;
+         function enterSelectMode(node) {
+           context.enter(modeSelect(context, [node.id]).newFeature(true));
+         }

 
 

-                   containerLocGetter = utilFastMouse(container.node());
+         function addNode(node) {
+           if (Object.keys(defaultTags).length === 0) {
+             enterSelectMode(node);
+             return;
+           }

 
 

-                   // offset from edge of sidebar-resizer
-                   dragOffset = utilFastMouse(resizer.node())(event)[0] - 1;
+           var tags = Object.assign({}, node.tags); // shallow copy

 
 

-                   sidebarWidth = selection.node().getBoundingClientRect().width;
-                   containerWidth = container.node().getBoundingClientRect().width;
-                   var widthPct = (sidebarWidth / containerWidth) * 100;
-                   selection
-                       .style('width', widthPct + '%')    // lock in current width
-                       .style('max-width', '85%');        // but allow larger widths
+           for (var key in defaultTags) {
+             tags[key] = defaultTags[key];
+           }

 
 

-                   resizer.classed('dragging', true);
+           context.perform(actionChangeTags(node.id, tags), _t('operations.add.annotation.point'));
+           enterSelectMode(node);
+         }

 
 

-                   select(window)
-                       .on('touchmove.sidebar-resizer', function() {
-                           // disable page scrolling while resizing on touch input
-                           event.preventDefault();
-                       }, { passive: false })
-                       .on(_pointerPrefix + 'move.sidebar-resizer', pointermove)
-                       .on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', pointerup);
-               }
+         function cancel() {
+           context.enter(modeBrowse(context));
+         }

 
 

-               function pointermove() {
+         mode.enter = function () {
+           context.install(behavior);
+         };

 
 

-                   if (downPointerId !== (event.pointerId || 'mouse')) { return; }
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };

 
 

-                   event.preventDefault();
+         return mode;
+       }

 
 

-                   var dx = event.clientX - lastClientX;
+       function modeSelectNote(context, selectedNoteID) {
+         var mode = {
+           id: 'select-note',
+           button: 'browse'
+         };

 
 

-                   lastClientX = event.clientX;
+         var _keybinding = utilKeybinding('select-note');

 
 

-                   var isRTL = (_mainLocalizer.textDirection() === 'rtl');
-                   var scaleX = isRTL ? 0 : 1;
-                   var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+         var _noteEditor = uiNoteEditor(context).on('change', function () {
+           context.map().pan([0, 0]); // trigger a redraw

 
 

-                   var x = containerLocGetter(event)[0] - dragOffset;
-                   sidebarWidth = isRTL ? containerWidth - x : x;
+           var note = checkSelectedID();
+           if (!note) return;
+           context.ui().sidebar.show(_noteEditor.note(note));
+         });

 
 

-                   var isCollapsed = selection.classed('collapsed');
-                   var shouldCollapse = sidebarWidth < minWidth;
+         var _behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+         var _newFeature = false;

 
 

-                   selection.classed('collapsed', shouldCollapse);
+         function checkSelectedID() {
+           if (!services.osm) return;
+           var note = services.osm.getNote(selectedNoteID);

 
 

-                   if (shouldCollapse) {
-                       if (!isCollapsed) {
-                           selection
-                               .style(xMarginProperty, '-400px')
-                               .style('width', '400px');
+           if (!note) {
+             context.enter(modeBrowse(context));
+           }

 
 

-                           context.ui().onResize([(sidebarWidth - dx) * scaleX, 0]);
-                       }
+           return note;
+         } // class the note as selected, or return to browse mode if the note is gone

 
 

-                   } else {
-                       var widthPct = (sidebarWidth / containerWidth) * 100;
-                       selection
-                           .style(xMarginProperty, null)
-                           .style('width', widthPct + '%');

 
 

-                       if (isCollapsed) {
-                           context.ui().onResize([-sidebarWidth * scaleX, 0]);
-                       } else {
-                           context.ui().onResize([-dx * scaleX, 0]);
-                       }
-                   }
-               }
+         function selectNote(d3_event, drawn) {
+           if (!checkSelectedID()) return;
+           var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);

 
 

-               function pointerup() {
-                   if (downPointerId !== (event.pointerId || 'mouse')) { return; }
+           if (selection.empty()) {
+             // Return to browse mode if selected DOM elements have
+             // disappeared because the user moved them out of view..
+             var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;

 
 

-                   downPointerId = null;
+             if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+               context.enter(modeBrowse(context));
+             }
+           } else {
+             selection.classed('selected', true);
+             context.selectedNoteID(selectedNoteID);
+           }
+         }

 
 

-                   resizer.classed('dragging', false);
+         function esc() {
+           if (context.container().select('.combobox').size()) return;
+           context.enter(modeBrowse(context));
+         }

 
 

-                   select(window)
-                       .on('touchmove.sidebar-resizer', null)
-                       .on(_pointerPrefix + 'move.sidebar-resizer', null)
-                       .on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', null);
-               }
+         mode.zoomToSelected = function () {
+           if (!services.osm) return;
+           var note = services.osm.getNote(selectedNoteID);

 
 

-               var featureListWrap = selection
-                   .append('div')
-                   .attr('class', 'feature-list-pane')
-                   .call(uiFeatureList(context));
+           if (note) {
+             context.map().centerZoomEase(note.loc, 20);
+           }
+         };

 
 

-               var inspectorWrap = selection
-                   .append('div')
-                   .attr('class', 'inspector-hidden inspector-wrap');
+         mode.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return mode;
+         };

 
 

-               var hoverModeSelect = function(targets) {
-                   context.container().selectAll('.feature-list-item').classed('hover', false);
+         mode.enter = function () {
+           var note = checkSelectedID();
+           if (!note) return;

 
 

-                   if (context.selectedIDs().length > 1 &&
-                       targets && targets.length) {
+           _behaviors.forEach(context.install);

 
 

-                       var elements = context.container().selectAll('.feature-list-item')
-                           .filter(function (node) {
-                               return targets.indexOf(node) !== -1;
-                           });
+           _keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);

 
 

-                       if (!elements.empty()) {
-                           elements.classed('hover', true);
-                       }
-                   }
-               };
+           select(document).call(_keybinding);
+           selectNote();
+           var sidebar = context.ui().sidebar;
+           sidebar.show(_noteEditor.note(note).newNote(_newFeature)); // expand the sidebar, avoid obscuring the note if needed

 
 

-               sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
+           sidebar.expand(sidebar.intersects(note.extent()));
+           context.map().on('drawn.select', selectNote);
+         };

 
 

-               function hover(targets) {
-                   var datum = targets && targets.length && targets[0];
-                   if (datum && datum.__featurehash__) {   // hovering on data
-                       _wasData = true;
-                       sidebar
-                           .show(dataEditor.datum(datum));
+         mode.exit = function () {
+           _behaviors.forEach(context.uninstall);

 
 

-                       selection.selectAll('.sidebar-component')
-                           .classed('inspector-hover', true);
+           select(document).call(_keybinding.unbind);
+           context.surface().selectAll('.layer-notes .selected').classed('selected hover', false);
+           context.map().on('drawn.select', null);
+           context.ui().sidebar.hide();
+           context.selectedNoteID(null);
+         };

 
 

-                   } else if (datum instanceof osmNote) {
-                       if (context.mode().id === 'drag-note') { return; }
-                       _wasNote = true;
+         return mode;
+       }

 
 

-                       var osm = services.osm;
-                       if (osm) {
-                           datum = osm.getNote(datum.id);   // marker may contain stale data - get latest
-                       }
+       function modeAddNote(context) {
+         var mode = {
+           id: 'add-note',
+           button: 'note',
+           description: _t.html('modes.add_note.description'),
+           key: _t('modes.add_note.key')
+         };
+         var behavior = behaviorDraw(context).on('click', add).on('cancel', cancel).on('finish', cancel);
+
+         function add(loc) {
+           var osm = services.osm;
+           if (!osm) return;
+           var note = osmNote({
+             loc: loc,
+             status: 'open',
+             comments: []
+           });
+           osm.replaceNote(note); // force a reraw (there is no history change that would otherwise do this)

 
 

-                       sidebar
-                           .show(noteEditor.note(datum));
+           context.map().pan([0, 0]);
+           context.selectedNoteID(note.id).enter(modeSelectNote(context, note.id).newFeature(true));
+         }

 
 

-                       selection.selectAll('.sidebar-component')
-                           .classed('inspector-hover', true);
+         function cancel() {
+           context.enter(modeBrowse(context));
+         }

 
 

-                   } else if (datum instanceof QAItem) {
-                       _wasQaItem = true;
+         mode.enter = function () {
+           context.install(behavior);
+         };

 
 

-                       var errService = services[datum.service];
-                       if (errService) {
-                           // marker may contain stale data - get latest
-                           datum = errService.getError(datum.id);
-                       }
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };

 
 

-                       // Currently only three possible services
-                       var errEditor;
-                       if (datum.service === 'keepRight') {
-                           errEditor = keepRightEditor;
-                       } else if (datum.service === 'osmose') {
-                           errEditor = osmoseEditor;
-                       } else {
-                           errEditor = improveOsmEditor;
-                       }
+         return mode;
+       }

 
 

-                       context.container().selectAll('.qaItem.' + datum.service)
-                           .classed('hover', function(d) { return d.id === datum.id; });
+       var JXON = new function () {
+         var sValueProp = 'keyValue',
+             sAttributesProp = 'keyAttributes',
+             sAttrPref = '@',

 
 

-                       sidebar
-                           .show(errEditor.error(datum));
+         /* you can customize these values */
+         aCache = [],
+             rIsNull = /^\s*$/,
+             rIsBool = /^(?:true|false)$/i;

 
 

-                       selection.selectAll('.sidebar-component')
-                           .classed('inspector-hover', true);
+         function parseText(sValue) {
+           if (rIsNull.test(sValue)) {
+             return null;
+           }

 
 

-                   } else if (!_current && (datum instanceof osmEntity)) {
-                       featureListWrap
-                           .classed('inspector-hidden', true);
+           if (rIsBool.test(sValue)) {
+             return sValue.toLowerCase() === 'true';
+           }

 
 

-                       inspectorWrap
-                           .classed('inspector-hidden', false)
-                           .classed('inspector-hover', true);
+           if (isFinite(sValue)) {
+             return parseFloat(sValue);
+           }

 
 

-                       if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
-                           inspector
-                               .state('hover')
-                               .entityIDs([datum.id])
-                               .newFeature(false);
+           if (isFinite(Date.parse(sValue))) {
+             return new Date(sValue);
+           }

 
 

-                           inspectorWrap
-                               .call(inspector);
-                       }
+           return sValue;
+         }

 
 

-                   } else if (!_current) {
-                       featureListWrap
-                           .classed('inspector-hidden', false);
-                       inspectorWrap
-                           .classed('inspector-hidden', true);
-                       inspector
-                           .state('hide');
-
-                   } else if (_wasData || _wasNote || _wasQaItem) {
-                       _wasNote = false;
-                       _wasData = false;
-                       _wasQaItem = false;
-                       context.container().selectAll('.note').classed('hover', false);
-                       context.container().selectAll('.qaItem').classed('hover', false);
-                       sidebar.hide();
-                   }
-               }
+         function EmptyTree() {}

 
 

-               sidebar.hover = throttle(hover, 200);
+         EmptyTree.prototype.toString = function () {
+           return 'null';
+         };

 
 

+         EmptyTree.prototype.valueOf = function () {
+           return null;
+         };

 
 

-               sidebar.intersects = function(extent) {
-                   var rect = selection.node().getBoundingClientRect();
-                   return extent.intersects([
-                       context.projection.invert([0, rect.height]),
-                       context.projection.invert([rect.width, 0])
-                   ]);
-               };
+         function objectify(vValue) {
+           return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
+         }

 
 

+         function createObjTree(oParentNode, nVerb, bFreeze, bNesteAttr) {
+           var nLevelStart = aCache.length,
+               bChildren = oParentNode.hasChildNodes(),
+               bAttributes = oParentNode.hasAttributes(),
+               bHighVerb = Boolean(nVerb & 2);
+           var sProp,
+               vContent,
+               nLength = 0,
+               sCollectedTxt = '',
+               vResult = bHighVerb ? {} :
+           /* put here the default value for empty nodes: */
+           true;

 
 

-               sidebar.select = function(ids, newFeature) {
-                   sidebar.hide();
+           if (bChildren) {
+             for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
+               oNode = oParentNode.childNodes.item(nItem);

 
 

-                   if (ids && ids.length) {
+               if (oNode.nodeType === 4) {
+                 /* nodeType is 'CDATASection' (4) */
+                 sCollectedTxt += oNode.nodeValue;
+               } else if (oNode.nodeType === 3) {
+                 /* nodeType is 'Text' (3) */
+                 sCollectedTxt += oNode.nodeValue.trim();
+               } else if (oNode.nodeType === 1 && !oNode.prefix) {
+                 /* nodeType is 'Element' (1) */
+                 aCache.push(oNode);
+               }
+             }
+           }

 
 

-                       var entity = ids.length === 1 && context.entity(ids[0]);
-                       if (entity && newFeature && selection.classed('collapsed')) {
-                           // uncollapse the sidebar
-                           var extent = entity.extent(context.graph());
-                           sidebar.expand(sidebar.intersects(extent));
-                       }
+           var nLevelEnd = aCache.length,
+               vBuiltVal = parseText(sCollectedTxt);

 
 

-                       featureListWrap
-                           .classed('inspector-hidden', true);
+           if (!bHighVerb && (bChildren || bAttributes)) {
+             vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
+           }

 
 

-                       inspectorWrap
-                           .classed('inspector-hidden', false)
-                           .classed('inspector-hover', false);
+           for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
+             sProp = aCache[nElId].nodeName.toLowerCase();
+             vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);

 
 

-                       if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), ids) || inspector.state() !== 'select') {
-                           inspector
-                               .state('select')
-                               .entityIDs(ids)
-                               .newFeature(newFeature);
+             if (vResult.hasOwnProperty(sProp)) {
+               if (vResult[sProp].constructor !== Array) {
+                 vResult[sProp] = [vResult[sProp]];
+               }

 
 

-                           inspectorWrap
-                               .call(inspector);
-                       }
+               vResult[sProp].push(vContent);
+             } else {
+               vResult[sProp] = vContent;
+               nLength++;
+             }
+           }

 
 

-                   } else {
-                       inspector
-                           .state('hide');
-                   }
-               };
+           if (bAttributes) {
+             var nAttrLen = oParentNode.attributes.length,
+                 sAPrefix = bNesteAttr ? '' : sAttrPref,
+                 oAttrParent = bNesteAttr ? {} : vResult;

 
 

+             for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
+               oAttrib = oParentNode.attributes.item(nAttrib);
+               oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
+             }

 
 

-               sidebar.showPresetList = function() {
-                   inspector.showList();
-               };
+             if (bNesteAttr) {
+               if (bFreeze) {
+                 Object.freeze(oAttrParent);
+               }

 
 

+               vResult[sAttributesProp] = oAttrParent;
+               nLength -= nAttrLen - 1;
+             }
+           }

 
 

-               sidebar.show = function(component, element) {
-                   featureListWrap
-                       .classed('inspector-hidden', true);
-                   inspectorWrap
-                       .classed('inspector-hidden', true);
+           if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
+             vResult[sValueProp] = vBuiltVal;
+           } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
+             vResult = vBuiltVal;
+           }

 
 

-                   if (_current) { _current.remove(); }
-                   _current = selection
-                       .append('div')
-                       .attr('class', 'sidebar-component')
-                       .call(component, element);
-               };
+           if (bFreeze && (bHighVerb || nLength > 0)) {
+             Object.freeze(vResult);
+           }

 
 

+           aCache.length = nLevelStart;
+           return vResult;
+         }

 
 

-               sidebar.hide = function() {
-                   featureListWrap
-                       .classed('inspector-hidden', false);
-                   inspectorWrap
-                       .classed('inspector-hidden', true);
+         function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
+           var vValue, oChild;

 
 

-                   if (_current) { _current.remove(); }
-                   _current = null;
-               };
+           if (oParentObj instanceof String || oParentObj instanceof Number || oParentObj instanceof Boolean) {
+             oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toString()));
+             /* verbosity level is 0 */
+           } else if (oParentObj.constructor === Date) {
+             oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toGMTString()));
+           }

 
 

+           for (var sName in oParentObj) {
+             vValue = oParentObj[sName];

 
 

-               sidebar.expand = function(moveMap) {
-                   if (selection.classed('collapsed')) {
-                       sidebar.toggle(moveMap);
-                   }
-               };
+             if (isFinite(sName) || vValue instanceof Function) {
+               continue;
+             }
+             /* verbosity level is 0 */

 
 
 
 

-               sidebar.collapse = function(moveMap) {
-                   if (!selection.classed('collapsed')) {
-                       sidebar.toggle(moveMap);
-                   }
-               };
+             if (sName === sValueProp) {
+               if (vValue !== null && vValue !== true) {
+                 oParentEl.appendChild(oXMLDoc.createTextNode(vValue.constructor === Date ? vValue.toGMTString() : String(vValue)));
+               }
+             } else if (sName === sAttributesProp) {
+               /* verbosity level is 3 */
+               for (var sAttrib in vValue) {
+                 oParentEl.setAttribute(sAttrib, vValue[sAttrib]);
+               }
+             } else if (sName.charAt(0) === sAttrPref) {
+               oParentEl.setAttribute(sName.slice(1), vValue);
+             } else if (vValue.constructor === Array) {
+               for (var nItem = 0; nItem < vValue.length; nItem++) {
+                 oChild = oXMLDoc.createElement(sName);
+                 loadObjTree(oXMLDoc, oChild, vValue[nItem]);
+                 oParentEl.appendChild(oChild);
+               }
+             } else {
+               oChild = oXMLDoc.createElement(sName);

 
 

+               if (vValue instanceof Object) {
+                 loadObjTree(oXMLDoc, oChild, vValue);
+               } else if (vValue !== null && vValue !== true) {
+                 oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
+               }

 
 

-               sidebar.toggle = function(moveMap) {
-                   var e = event;
-                   if (e && e.sourceEvent) {
-                       e.sourceEvent.preventDefault();
-                   } else if (e) {
-                       e.preventDefault();
-                   }
+               oParentEl.appendChild(oChild);
+             }
+           }
+         }

 
 

-                   // Don't allow sidebar to toggle when the user is in the walkthrough.
-                   if (context.inIntro()) { return; }
+         this.build = function (oXMLParent, nVerbosity
+         /* optional */
+         , bFreeze
+         /* optional */
+         , bNesteAttributes
+         /* optional */
+         ) {
+           var _nVerb = arguments.length > 1 && typeof nVerbosity === 'number' ? nVerbosity & 3 :
+           /* put here the default verbosity level: */
+           1;

 
 

-                   var isCollapsed = selection.classed('collapsed');
-                   var isCollapsing = !isCollapsed;
-                   var isRTL = (_mainLocalizer.textDirection() === 'rtl');
-                   var scaleX = isRTL ? 0 : 1;
-                   var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+           return createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);
+         };

 
 

-                   sidebarWidth = selection.node().getBoundingClientRect().width;
+         this.unbuild = function (oObjTree) {
+           var oNewDoc = document.implementation.createDocument('', '', null);
+           loadObjTree(oNewDoc, oNewDoc, oObjTree);
+           return oNewDoc;
+         };

 
 

-                   // switch from % to px
-                   selection.style('width', sidebarWidth + 'px');
+         this.stringify = function (oObjTree) {
+           return new XMLSerializer().serializeToString(JXON.unbuild(oObjTree));
+         };
+       }(); // var myObject = JXON.build(doc);
+       // we got our javascript object! try: alert(JSON.stringify(myObject));
+       // var newDoc = JXON.unbuild(myObject);
+       // we got our Document instance! try: alert((new XMLSerializer()).serializeToString(newDoc));

 
 

-                   var startMargin, endMargin, lastMargin;
-                   if (isCollapsing) {
-                       startMargin = lastMargin = 0;
-                       endMargin = -sidebarWidth;
-                   } else {
-                       startMargin = lastMargin = -sidebarWidth;
-                       endMargin = 0;
-                   }
+       function uiConflicts(context) {
+         var dispatch = dispatch$8('cancel', 'save');
+         var keybinding = utilKeybinding('conflicts');

 
 

-                   selection.transition()
-                       .style(xMarginProperty, endMargin + 'px')
-                       .tween('panner', function() {
-                           var i = d3_interpolateNumber(startMargin, endMargin);
-                           return function(t) {
-                               var dx = lastMargin - Math.round(i(t));
-                               lastMargin = lastMargin - dx;
-                               context.ui().onResize(moveMap ? undefined : [dx * scaleX, 0]);
-                           };
-                       })
-                       .on('end', function() {
-                           selection.classed('collapsed', isCollapsing);
-
-                           // switch back from px to %
-                           if (!isCollapsing) {
-                               var containerWidth = container.node().getBoundingClientRect().width;
-                               var widthPct = (sidebarWidth / containerWidth) * 100;
-                               selection
-                                   .style(xMarginProperty, null)
-                                   .style('width', widthPct + '%');
-                           }
-                       });
-               };
+         var _origChanges;

 
 

-               // toggle the sidebar collapse when double-clicking the resizer
-               resizer.on('dblclick', sidebar.toggle);
+         var _conflictList;

 
 

-               // ensure hover sidebar is closed when zooming out beyond editable zoom
-               context.map().on('crossEditableZoom.sidebar', function(within) {
-                   if (!within && !selection.select('.inspector-hover').empty()) {
-                       hover([]);
-                   }
-               });
-           }
+         var _shownConflictIndex;

 
 

-           sidebar.showPresetList = function() {};
-           sidebar.hover = function() {};
-           sidebar.hover.cancel = function() {};
-           sidebar.intersects = function() {};
-           sidebar.select = function() {};
-           sidebar.show = function() {};
-           sidebar.hide = function() {};
-           sidebar.expand = function() {};
-           sidebar.collapse = function() {};
-           sidebar.toggle = function() {};
+         function keybindingOn() {
+           select(document).call(keybinding.on('⎋', cancel, true));
+         }

 
 

-           return sidebar;
-       }
+         function keybindingOff() {
+           select(document).call(keybinding.unbind);
+         }

 
 

-       function uiSourceSwitch(context) {
-           var keys;
+         function tryAgain() {
+           keybindingOff();
+           dispatch.call('save');
+         }

 
 

+         function cancel() {
+           keybindingOff();
+           dispatch.call('cancel');
+         }

 
 

-           function click() {
-               event.preventDefault();
+         function conflicts(selection) {
+           keybindingOn();
+           var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'fr').on('click', cancel).call(svgIcon('#iD-icon-close'));
+           headerEnter.append('h3').html(_t.html('save.conflict.header'));
+           var bodyEnter = selection.selectAll('.body').data([0]).enter().append('div').attr('class', 'body fillL');
+           var conflictsHelpEnter = bodyEnter.append('div').attr('class', 'conflicts-help').html(_t.html('save.conflict.help')); // Download changes link

 
 

-               var osm = context.connection();
-               if (!osm) { return; }
+           var detected = utilDetect();
+           var changeset = new osmChangeset();
+           delete changeset.id; // Export without changeset_id

 
 

-               if (context.inIntro()) { return; }
+           var data = JXON.stringify(changeset.osmChangeJXON(_origChanges));
+           var blob = new Blob([data], {
+             type: 'text/xml;charset=utf-8;'
+           });
+           var fileName = 'changes.osc';
+           var linkEnter = conflictsHelpEnter.selectAll('.download-changes').append('a').attr('class', 'download-changes');

 
 

-               if (context.history().hasChanges() &&
-                   !window.confirm(_t('source_switch.lose_changes'))) { return; }
+           if (detected.download) {
+             // All except IE11 and Edge
+             linkEnter // download the data as a file
+             .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
+           } else {
+             // IE11 and Edge
+             linkEnter // open data uri in a new tab
+             .attr('target', '_blank').on('click.download', function () {
+               navigator.msSaveBlob(blob, fileName);
+             });
+           }

 
 

-               var isLive = select(this)
-                   .classed('live');
+           linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').html(_t.html('save.conflict.download_changes'));
+           bodyEnter.append('div').attr('class', 'conflict-container fillL3').call(showConflict, 0);
+           bodyEnter.append('div').attr('class', 'conflicts-done').attr('opacity', 0).style('display', 'none').html(_t.html('save.conflict.done'));
+           var buttonsEnter = bodyEnter.append('div').attr('class', 'buttons col12 joined conflicts-buttons');
+           buttonsEnter.append('button').attr('disabled', _conflictList.length > 1).attr('class', 'action conflicts-button col6').html(_t.html('save.title')).on('click.try_again', tryAgain);
+           buttonsEnter.append('button').attr('class', 'secondary-action conflicts-button col6').html(_t.html('confirm.cancel')).on('click.cancel', cancel);
+         }
+
+         function showConflict(selection, index) {
+           index = utilWrap(index, _conflictList.length);
+           _shownConflictIndex = index;
+           var parent = select(selection.node().parentNode); // enable save button if this is the last conflict being reviewed..
+
+           if (index === _conflictList.length - 1) {
+             window.setTimeout(function () {
+               parent.select('.conflicts-button').attr('disabled', null);
+               parent.select('.conflicts-done').transition().attr('opacity', 1).style('display', 'block');
+             }, 250);
+           }
+
+           var conflict = selection.selectAll('.conflict').data([_conflictList[index]]);
+           conflict.exit().remove();
+           var conflictEnter = conflict.enter().append('div').attr('class', 'conflict');
+           conflictEnter.append('h4').attr('class', 'conflict-count').html(_t.html('save.conflict.count', {
+             num: index + 1,
+             total: _conflictList.length
+           }));
+           conflictEnter.append('a').attr('class', 'conflict-description').attr('href', '#').html(function (d) {
+             return d.name;
+           }).on('click', function (d3_event, d) {
+             d3_event.preventDefault();
+             zoomToEntity(d.id);
+           });
+           var details = conflictEnter.append('div').attr('class', 'conflict-detail-container');
+           details.append('ul').attr('class', 'conflict-detail-list').selectAll('li').data(function (d) {
+             return d.details || [];
+           }).enter().append('li').attr('class', 'conflict-detail-item').html(function (d) {
+             return d;
+           });
+           details.append('div').attr('class', 'conflict-choices').call(addChoices);
+           details.append('div').attr('class', 'conflict-nav-buttons joined cf').selectAll('button').data(['previous', 'next']).enter().append('button').html(function (d) {
+             return _t.html('save.conflict.' + d);
+           }).attr('class', 'conflict-nav-button action col6').attr('disabled', function (d, i) {
+             return i === 0 && index === 0 || i === 1 && index === _conflictList.length - 1 || null;
+           }).on('click', function (d3_event, d) {
+             d3_event.preventDefault();
+             var container = parent.selectAll('.conflict-container');
+             var sign = d === 'previous' ? -1 : 1;
+             container.selectAll('.conflict').remove();
+             container.call(showConflict, index + sign);
+           });
+         }

 
 

-               isLive = !isLive;
-               context.enter(modeBrowse(context));
-               context.history().clearSaved();          // remove saved history
-               context.flush();                         // remove stored data
+         function addChoices(selection) {
+           var choices = selection.append('ul').attr('class', 'layer-list').selectAll('li').data(function (d) {
+             return d.choices || [];
+           }); // enter

 
 

-               select(this)
-                   .text(isLive ? _t('source_switch.live') : _t('source_switch.dev'))
-                   .classed('live', isLive)
-                   .classed('chip', isLive);
+           var choicesEnter = choices.enter().append('li').attr('class', 'layer');
+           var labelEnter = choicesEnter.append('label');
+           labelEnter.append('input').attr('type', 'radio').attr('name', function (d) {
+             return d.id;
+           }).on('change', function (d3_event, d) {
+             var ul = this.parentNode.parentNode.parentNode;
+             ul.__data__.chosen = d.id;
+             choose(d3_event, ul, d);
+           });
+           labelEnter.append('span').html(function (d) {
+             return d.text;
+           }); // update

 
 

-               osm.switch(isLive ? keys[0] : keys[1]);  // switch connection (warning: dispatches 'change' event)
-           }
+           choicesEnter.merge(choices).each(function (d) {
+             var ul = this.parentNode;

 
 

-           var sourceSwitch = function(selection) {
-               selection
-                   .append('a')
-                   .attr('href', '#')
-                   .text(_t('source_switch.live'))
-                   .attr('class', 'live chip')
-                   .on('click', click);
-           };
+             if (ul.__data__.chosen === d.id) {
+               choose(null, ul, d);
+             }
+           });
+         }

 
 

+         function choose(d3_event, ul, datum) {
+           if (d3_event) d3_event.preventDefault();
+           select(ul).selectAll('li').classed('active', function (d) {
+             return d === datum;
+           }).selectAll('input').property('checked', function (d) {
+             return d === datum;
+           });
+           var extent = geoExtent();
+           var entity;
+           entity = context.graph().hasEntity(datum.id);
+           if (entity) extent._extend(entity.extent(context.graph()));
+           datum.action();
+           entity = context.graph().hasEntity(datum.id);
+           if (entity) extent._extend(entity.extent(context.graph()));
+           zoomToEntity(datum.id, extent);
+         }
+
+         function zoomToEntity(id, extent) {
+           context.surface().selectAll('.hover').classed('hover', false);
+           var entity = context.graph().hasEntity(id);
+
+           if (entity) {
+             if (extent) {
+               context.map().trimmedExtent(extent);
+             } else {
+               context.map().zoomToEase(entity);
+             }

 
 

-           sourceSwitch.keys = function(_) {
-               if (!arguments.length) { return keys; }
-               keys = _;
-               return sourceSwitch;
-           };
+             context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
+           }
+         } // The conflict list should be an array of objects like:
+         // {
+         //     id: id,
+         //     name: entityName(local),
+         //     details: merge.conflicts(),
+         //     chosen: 1,
+         //     choices: [
+         //         choice(id, keepMine, forceLocal),
+         //         choice(id, keepTheirs, forceRemote)
+         //     ]
+         // }

 
 
 
 

-           return sourceSwitch;
-       }
+         conflicts.conflictList = function (_) {
+           if (!arguments.length) return _conflictList;
+           _conflictList = _;
+           return conflicts;
+         };

 
 

-       function uiSpinner(context) {
-           var osm = context.connection();
+         conflicts.origChanges = function (_) {
+           if (!arguments.length) return _origChanges;
+           _origChanges = _;
+           return conflicts;
+         };

 
 

+         conflicts.shownEntityIds = function () {
+           if (_conflictList && typeof _shownConflictIndex === 'number') {
+             return [_conflictList[_shownConflictIndex].id];
+           }

 
 

-           return function(selection) {
-               var img = selection
-                   .append('img')
-                   .attr('src', context.imagePath('loader-black.gif'))
-                   .style('opacity', 0);
+           return [];
+         };

 
 

-               if (osm) {
-                   osm
-                       .on('loading.spinner', function() {
-                           img.transition()
-                               .style('opacity', 1);
-                       })
-                       .on('loaded.spinner', function() {
-                           img.transition()
-                               .style('opacity', 0);
-                       });
-               }
-           };
+         return utilRebind(conflicts, dispatch, 'on');

        }
 
        }
 

-       function uiSplash(context) {
-         return function (selection) {
-           // Exception - if there are restorable changes, skip this splash screen.
-           // This is because we currently only support one `uiModal` at a time
-           //  and we need to show them `uiRestore`` instead of this one.
-           if (context.history().hasRestorableChanges()) { return; }
+       function uiConfirm(selection) {
+         var modalSelection = uiModal(selection);
+         modalSelection.select('.modal').classed('modal-alert', true);
+         var section = modalSelection.select('.content');
+         section.append('div').attr('class', 'modal-section header');
+         section.append('div').attr('class', 'modal-section message-text');
+         var buttons = section.append('div').attr('class', 'modal-section buttons cf');
+
+         modalSelection.okButton = function () {
+           buttons.append('button').attr('class', 'button ok-button action').on('click.confirm', function () {
+             modalSelection.remove();
+           }).html(_t.html('confirm.okay')).node().focus();
+           return modalSelection;
+         };

 
 

-           // If user has not seen this version of the privacy policy, show the splash again.
-           var updateMessage = '';
-           var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
-           var showSplash = !corePreferences('sawSplash');
-           if (sawPrivacyVersion !== context.privacyVersion) {
-             updateMessage = _t('splash.privacy_update');
-             showSplash = true;
-           }
+         return modalSelection;
+       }

 
 

-           if (!showSplash) { return; }
+       function uiChangesetEditor(context) {
+         var dispatch = dispatch$8('change');
+         var formFields = uiFormFields(context);
+         var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);

 
 

-           corePreferences('sawSplash', true);
-           corePreferences('sawPrivacyVersion', context.privacyVersion);
+         var _fieldsArr;

 
 

-           // fetch intro graph data now, while user is looking at the splash screen
-           _mainFileFetcher.get('intro_graph');
+         var _tags;

 
 

-           var modalSelection = uiModal(selection);
+         var _changesetID;

 
 

-           modalSelection.select('.modal')
-             .attr('class', 'modal-splash modal');
-
-           var introModal = modalSelection.select('.content')
-             .append('div')
-             .attr('class', 'fillL');
-
-           introModal
-             .append('div')
-             .attr('class','modal-section')
-             .append('h3')
-             .text(_t('splash.welcome'));
-
-           var modalSection = introModal
-             .append('div')
-             .attr('class','modal-section');
-
-           modalSection
-             .append('p')
-             .html(_t('splash.text', {
-               version: context.version,
-               website: '<a target="_blank" href="http://ideditor.blog/">ideditor.blog</a>',
-               github: '<a target="_blank" href="https://github.com/openstreetmap/iD">github.com</a>'
-             }));
+         function changesetEditor(selection) {
+           render(selection);
+         }

 
 

-           modalSection
-             .append('p')
-             .html(_t('splash.privacy', {
-               updateMessage: updateMessage,
-               privacyLink: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/release/PRIVACY.md">' +
-                 _t('splash.privacy_policy') + '</a>'
-             }));
+         function render(selection) {
+           var initial = false;

 
 

-           var buttonWrap = introModal
-             .append('div')
-             .attr('class', 'modal-actions');
+           if (!_fieldsArr) {
+             initial = true;
+             var presets = _mainPresetIndex;
+             _fieldsArr = [uiField(context, presets.field('comment'), null, {
+               show: true,
+               revert: false
+             }), uiField(context, presets.field('source'), null, {
+               show: false,
+               revert: false
+             }), uiField(context, presets.field('hashtags'), null, {
+               show: false,
+               revert: false
+             })];

 
 

-           var walkthrough = buttonWrap
-             .append('button')
-             .attr('class', 'walkthrough')
-             .on('click', function () {
-               context.container().call(uiIntro(context));
-               modalSelection.close();
+             _fieldsArr.forEach(function (field) {
+               field.on('change', function (t, onInput) {
+                 dispatch.call('change', field, undefined, t, onInput);
+               });

              });
              });

+           }
+
+           _fieldsArr.forEach(function (field) {
+             field.tags(_tags);
+           });

 
 

-           walkthrough
-             .append('svg')
-             .attr('class', 'logo logo-walkthrough')
-             .append('use')
-             .attr('xlink:href', '#iD-logo-walkthrough');
+           selection.call(formFields.fieldsArr(_fieldsArr));
+
+           if (initial) {
+             var commentField = selection.select('.form-field-comment textarea');
+             var commentNode = commentField.node();
+
+             if (commentNode) {
+               commentNode.focus();
+               commentNode.select();
+             } // trigger a 'blur' event so that comment field can be cleaned
+             // and checked for hashtags, even if retrieved from localstorage
+
+
+             utilTriggerEvent(commentField, 'blur');
+             var osm = context.connection();
+
+             if (osm) {
+               osm.userChangesets(function (err, changesets) {
+                 if (err) return;
+                 var comments = changesets.map(function (changeset) {
+                   var comment = changeset.tags.comment;
+                   return comment ? {
+                     title: comment,
+                     value: comment
+                   } : null;
+                 }).filter(Boolean);
+                 commentField.call(commentCombo.data(utilArrayUniqBy(comments, 'title')));
+               });
+             }
+           } // Add warning if comment mentions Google

 
 

-           walkthrough
-             .append('div')
-             .text(_t('splash.walkthrough'));

 
 

-           var startEditing = buttonWrap
-             .append('button')
-             .attr('class', 'start-editing')
-             .on('click', modalSelection.close);
+           var hasGoogle = _tags.comment.match(/google/i);

 
 

-           startEditing
-             .append('svg')
-             .attr('class', 'logo logo-features')
-             .append('use')
-             .attr('xlink:href', '#iD-logo-features');
+           var commentWarning = selection.select('.form-field-comment').selectAll('.comment-warning').data(hasGoogle ? [0] : []);
+           commentWarning.exit().transition().duration(200).style('opacity', 0).remove();
+           var commentEnter = commentWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning comment-warning').style('opacity', 0);
+           commentEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-alert', 'inline')).attr('href', _t('commit.google_warning_link')).append('span').html(_t.html('commit.google_warning'));
+           commentEnter.transition().duration(200).style('opacity', 1);
+         }

 
 

-           startEditing
-             .append('div')
-             .text(_t('splash.start'));
+         changesetEditor.tags = function (_) {
+           if (!arguments.length) return _tags;
+           _tags = _; // Don't reset _fieldsArr here.

 
 

-           modalSelection.select('button.close')
-             .attr('class','hide');
+           return changesetEditor;

          };
          };

-       }

 
 

-       function uiStatus(context) {
-           var osm = context.connection();
+         changesetEditor.changesetID = function (_) {
+           if (!arguments.length) return _changesetID;
+           if (_changesetID === _) return changesetEditor;
+           _changesetID = _;
+           _fieldsArr = null;
+           return changesetEditor;
+         };

 
 

+         return utilRebind(changesetEditor, dispatch, 'on');
+       }

 
 

-           return function(selection) {
-               if (!osm) { return; }
+       function uiSectionChanges(context) {
+         var detected = utilDetect();
+         var _discardTags = {};
+         _mainFileFetcher.get('discarded').then(function (d) {
+           _discardTags = d;
+         })["catch"](function () {
+           /* ignore */
+         });
+         var section = uiSection('changes-list', context).label(function () {
+           var history = context.history();
+           var summary = history.difference().summary();
+           return _t('inspector.title_count', {
+             title: _t.html('commit.changes'),
+             count: summary.length
+           });
+         }).disclosureContent(renderDisclosureContent);

 
 

-               function update(err, apiStatus) {
-                   selection.html('');
+         function renderDisclosureContent(selection) {
+           var history = context.history();
+           var summary = history.difference().summary();
+           var container = selection.selectAll('.commit-section').data([0]);
+           var containerEnter = container.enter().append('div').attr('class', 'commit-section');
+           containerEnter.append('ul').attr('class', 'changeset-list');
+           container = containerEnter.merge(container);
+           var items = container.select('ul').selectAll('li').data(summary);
+           var itemsEnter = items.enter().append('li').attr('class', 'change-item');
+           var buttons = itemsEnter.append('button').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
+           buttons.each(function (d) {
+             select(this).call(svgIcon('#iD-icon-' + d.entity.geometry(d.graph), 'pre-text ' + d.changeType));
+           });
+           buttons.append('span').attr('class', 'change-type').html(function (d) {
+             return _t.html('commit.' + d.changeType) + ' ';
+           });
+           buttons.append('strong').attr('class', 'entity-type').html(function (d) {
+             var matched = _mainPresetIndex.match(d.entity, d.graph);
+             return matched && matched.name() || utilDisplayType(d.entity.id);
+           });
+           buttons.append('span').attr('class', 'entity-name').html(function (d) {
+             var name = utilDisplayName(d.entity) || '',
+                 string = '';

 
 

-                   if (err) {
-                       if (apiStatus === 'connectionSwitched') {
-                           // if the connection was just switched, we can't rely on
-                           // the status (we're getting the status of the previous api)
-                           return;
-
-                       } else if (apiStatus === 'rateLimited') {
-                           selection
-                               .text(_t('osm_api_status.message.rateLimit'))
-                               .append('a')
-                               .attr('class', 'api-status-login')
-                               .attr('target', '_blank')
-                               .call(svgIcon('#iD-icon-out-link', 'inline'))
-                               .append('span')
-                               .text(_t('login'))
-                               .on('click.login', function() {
-                                   event.preventDefault();
-                                   osm.authenticate();
-                               });
-                       } else {
+             if (name !== '') {
+               string += ':';
+             }

 
 

-                           // don't allow retrying too rapidly
-                           var throttledRetry = throttle(function() {
-                               // try loading the visible tiles
-                               context.loadTiles(context.projection);
-                               // manually reload the status too in case all visible tiles were already loaded
-                               osm.reloadApiStatus();
-                           }, 2000);
-
-                           // eslint-disable-next-line no-warning-comments
-                           // TODO: nice messages for different error types
-                           selection
-                               .text(_t('osm_api_status.message.error') + ' ')
-                               .append('a')
-                               // let the user manually retry their connection directly
-                               .text(_t('osm_api_status.retry'))
-                               .on('click.retry', function() {
-                                   event.preventDefault();
-                                   throttledRetry();
-                               });
-                       }
+             return string += ' ' + name;
+           });
+           items = itemsEnter.merge(items); // Download changeset link

 
 

-                   } else if (apiStatus === 'readonly') {
-                       selection.text(_t('osm_api_status.message.readonly'));
-                   } else if (apiStatus === 'offline') {
-                       selection.text(_t('osm_api_status.message.offline'));
-                   }
+           var changeset = new osmChangeset().update({
+             id: undefined
+           });
+           var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+           delete changeset.id; // Export without chnageset_id

 
 

-                   selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
-               }
+           var data = JXON.stringify(changeset.osmChangeJXON(changes));
+           var blob = new Blob([data], {
+             type: 'text/xml;charset=utf-8;'
+           });
+           var fileName = 'changes.osc';
+           var linkEnter = container.selectAll('.download-changes').data([0]).enter().append('a').attr('class', 'download-changes');

 
 

-               osm.on('apiStatusChange.uiStatus', update);
+           if (detected.download) {
+             // All except IE11 and Edge
+             linkEnter // download the data as a file
+             .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
+           } else {
+             // IE11 and Edge
+             linkEnter // open data uri in a new tab
+             .attr('target', '_blank').on('click.download', function () {
+               navigator.msSaveBlob(blob, fileName);
+             });
+           }

 
 

-               // reload the status periodically regardless of other factors
-               window.setInterval(function() {
-                   osm.reloadApiStatus();
-               }, 90000);
+           linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').html(_t.html('commit.download_changes'));

 
 

-               // load the initial status in case no OSM data was loaded yet
-               osm.reloadApiStatus();
-           };
-       }
+           function mouseover(d) {
+             if (d.entity) {
+               context.surface().selectAll(utilEntityOrMemberSelector([d.entity.id], context.graph())).classed('hover', true);
+             }
+           }

 
 

-       function modeDrawArea(context, wayID, startGraph, button) {
-           var mode = {
-               button: button,
-               id: 'draw-area'
-           };
+           function mouseout() {
+             context.surface().selectAll('.hover').classed('hover', false);
+           }

 
 

-           var behavior = behaviorDrawWay(context, wayID, mode, startGraph)
-               .on('rejectedSelfIntersection.modeDrawArea', function() {
-                   context.ui().flash
-                       .text(_t('self_intersection.error.areas'))();
-               });
+           function click(d3_event, change) {
+             if (change.changeType !== 'deleted') {
+               var entity = change.entity;
+               context.map().zoomToEase(entity);
+               context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
+             }
+           }
+         }

 
 

-           mode.wayID = wayID;
+         return section;
+       }

 
 

-           mode.enter = function() {
-               context.install(behavior);
-           };
+       function uiCommitWarnings(context) {
+         function commitWarnings(selection) {
+           var issuesBySeverity = context.validator().getIssuesBySeverity({
+             what: 'edited',
+             where: 'all',
+             includeDisabledRules: true
+           });

 
 

-           mode.exit = function() {
-               context.uninstall(behavior);
-           };
+           for (var severity in issuesBySeverity) {
+             var issues = issuesBySeverity[severity];

 
 

-           mode.selectedIDs = function() {
-               return [wayID];
-           };
+             if (severity !== 'error') {
+               // exclude 'fixme' and similar - #8603
+               issues = issues.filter(function (issue) {
+                 return issue.type !== 'help_request';
+               });
+             }

 
 

-           mode.activeID = function() {
-               return (behavior && behavior.activeID()) || [];
-           };
+             var section = severity + '-section';
+             var issueItem = severity + '-item';
+             var container = selection.selectAll('.' + section).data(issues.length ? [0] : []);
+             container.exit().remove();
+             var containerEnter = container.enter().append('div').attr('class', 'modal-section ' + section + ' fillL2');
+             containerEnter.append('h3').html(severity === 'warning' ? _t.html('commit.warnings') : _t.html('commit.errors'));
+             containerEnter.append('ul').attr('class', 'changeset-list');
+             container = containerEnter.merge(container);
+             var items = container.select('ul').selectAll('li').data(issues, function (d) {
+               return d.key;
+             });
+             items.exit().remove();
+             var itemsEnter = items.enter().append('li').attr('class', issueItem);
+             var buttons = itemsEnter.append('button').on('mouseover', function (d3_event, d) {
+               if (d.entityIds) {
+                 context.surface().selectAll(utilEntityOrMemberSelector(d.entityIds, context.graph())).classed('hover', true);
+               }
+             }).on('mouseout', function () {
+               context.surface().selectAll('.hover').classed('hover', false);
+             }).on('click', function (d3_event, d) {
+               context.validator().focusIssue(d);
+             });
+             buttons.call(svgIcon('#iD-icon-alert', 'pre-text'));
+             buttons.append('strong').attr('class', 'issue-message');
+             buttons.filter(function (d) {
+               return d.tooltip;
+             }).call(uiTooltip().title(function (d) {
+               return d.tooltip;
+             }).placement('top'));
+             items = itemsEnter.merge(items);
+             items.selectAll('.issue-message').html(function (d) {
+               return d.message(context);
+             });
+           }
+         }

 
 

-           return mode;
+         return commitWarnings;

        }
 
        }
 

-       function modeAddArea(context, mode) {
-           mode.id = 'add-area';
-
-           var behavior = behaviorAddWay(context)
-               .on('start', start)
-               .on('startFromWay', startFromWay)
-               .on('startFromNode', startFromNode);
+       var readOnlyTags = [/^changesets_count$/, /^created_by$/, /^ideditor:/, /^imagery_used$/, /^host$/, /^locale$/, /^warnings:/, /^resolved:/, /^closed:note$/, /^closed:keepright$/, /^closed:improveosm:/, /^closed:osmose:/]; // treat most punctuation (except -, _, +, &) as hashtag delimiters - #4398
+       // from https://stackoverflow.com/a/25575009

 
 

-           var defaultTags = { area: 'yes' };
-           if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'area'); }
+       var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
+       function uiCommit(context) {
+         var dispatch = dispatch$8('cancel');

 
 

+         var _userDetails;

 
 

-           function actionClose(wayId) {
-               return function (graph) {
-                   return graph.replace(graph.entity(wayId).close());
-               };
-           }
+         var _selection;

 
 

+         var changesetEditor = uiChangesetEditor(context).on('change', changeTags);
+         var rawTagEditor = uiSectionRawTagEditor('changeset-tag-editor', context).on('change', changeTags).readOnlyTags(readOnlyTags);
+         var commitChanges = uiSectionChanges(context);
+         var commitWarnings = uiCommitWarnings(context);

 
 

-           function start(loc) {
-               var startGraph = context.graph();
-               var node = osmNode({ loc: loc });
-               var way = osmWay({ tags: defaultTags });
+         function commit(selection) {
+           _selection = selection; // Initialize changeset if one does not exist yet.

 
 

-               context.perform(
-                   actionAddEntity(node),
-                   actionAddEntity(way),
-                   actionAddVertex(way.id, node.id),
-                   actionClose(way.id)
-               );
+           if (!context.changeset) initChangeset();
+           loadDerivedChangesetTags();
+           selection.call(render);
+         }

 
 

-               context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
-           }
+         function initChangeset() {
+           // expire stored comment, hashtags, source after cutoff datetime - #3947 #4899
+           var commentDate = +corePreferences('commentDate') || 0;
+           var currDate = Date.now();
+           var cutoff = 2 * 86400 * 1000; // 2 days

 
 

+           if (commentDate > currDate || currDate - commentDate > cutoff) {
+             corePreferences('comment', null);
+             corePreferences('hashtags', null);
+             corePreferences('source', null);
+           } // load in explicitly-set values, if any

 
 

-           function startFromWay(loc, edge) {
-               var startGraph = context.graph();
-               var node = osmNode({ loc: loc });
-               var way = osmWay({ tags: defaultTags });

 
 

-               context.perform(
-                   actionAddEntity(node),
-                   actionAddEntity(way),
-                   actionAddVertex(way.id, node.id),
-                   actionClose(way.id),
-                   actionAddMidpoint({ loc: loc, edge: edge }, node)
-               );
+           if (context.defaultChangesetComment()) {
+             corePreferences('comment', context.defaultChangesetComment());
+             corePreferences('commentDate', Date.now());
+           }

 
 

-               context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+           if (context.defaultChangesetSource()) {
+             corePreferences('source', context.defaultChangesetSource());
+             corePreferences('commentDate', Date.now());

            }
 
            }
 

+           if (context.defaultChangesetHashtags()) {
+             corePreferences('hashtags', context.defaultChangesetHashtags());
+             corePreferences('commentDate', Date.now());
+           }

 
 

-           function startFromNode(node) {
-               var startGraph = context.graph();
-               var way = osmWay({ tags: defaultTags });
+           var detected = utilDetect();
+           var tags = {
+             comment: corePreferences('comment') || '',
+             created_by: context.cleanTagValue('iD ' + context.version),
+             host: context.cleanTagValue(detected.host),
+             locale: context.cleanTagValue(_mainLocalizer.localeCode())
+           }; // call findHashtags initially - this will remove stored
+           // hashtags if any hashtags are found in the comment - #4304

 
 

-               context.perform(
-                   actionAddEntity(way),
-                   actionAddVertex(way.id, node.id),
-                   actionClose(way.id)
-               );
+           findHashtags(tags, true);
+           var hashtags = corePreferences('hashtags');

 
 

-               context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+           if (hashtags) {
+             tags.hashtags = hashtags;

            }
 
            }
 

+           var source = corePreferences('source');

 
 

-           mode.enter = function() {
-               context.install(behavior);
-           };
+           if (source) {
+             tags.source = source;
+           }

 
 

+           var photoOverlaysUsed = context.history().photoOverlaysUsed();

 
 

-           mode.exit = function() {
-               context.uninstall(behavior);
-           };
+           if (photoOverlaysUsed.length) {
+             var sources = (tags.source || '').split(';'); // include this tag for any photo layer

 
 

+             if (sources.indexOf('streetlevel imagery') === -1) {
+               sources.push('streetlevel imagery');
+             } // add the photo overlays used during editing as sources

 
 

-           return mode;
-       }

 
 

-       function modeAddLine(context, mode) {
-           mode.id = 'add-line';
+             photoOverlaysUsed.forEach(function (photoOverlay) {
+               if (sources.indexOf(photoOverlay) === -1) {
+                 sources.push(photoOverlay);
+               }
+             });
+             tags.source = context.cleanTagValue(sources.join(';'));
+           }

 
 

-           var behavior = behaviorAddWay(context)
-               .on('start', start)
-               .on('startFromWay', startFromWay)
-               .on('startFromNode', startFromNode);
+           context.changeset = new osmChangeset({
+             tags: tags
+           });
+         } // Calculates read-only metadata tags based on the user's editing session and applies
+         // them to the changeset.

 
 

-           var defaultTags = {};
-           if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'line'); }

 
 

+         function loadDerivedChangesetTags() {
+           var osm = context.connection();
+           if (!osm) return;
+           var tags = Object.assign({}, context.changeset.tags); // shallow copy
+           // assign tags for imagery used

 
 

-           function start(loc) {
-               var startGraph = context.graph();
-               var node = osmNode({ loc: loc });
-               var way = osmWay({ tags: defaultTags });
+           var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
+           tags.imagery_used = imageryUsed || 'None'; // assign tags for closed issues and notes

 
 

-               context.perform(
-                   actionAddEntity(node),
-                   actionAddEntity(way),
-                   actionAddVertex(way.id, node.id)
-               );
+           var osmClosed = osm.getClosedIDs();
+           var itemType;

 
 

-               context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+           if (osmClosed.length) {
+             tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));

            }
 
            }
 

+           if (services.keepRight) {
+             var krClosed = services.keepRight.getClosedIDs();

 
 

-           function startFromWay(loc, edge) {
-               var startGraph = context.graph();
-               var node = osmNode({ loc: loc });
-               var way = osmWay({ tags: defaultTags });
-
-               context.perform(
-                   actionAddEntity(node),
-                   actionAddEntity(way),
-                   actionAddVertex(way.id, node.id),
-                   actionAddMidpoint({ loc: loc, edge: edge }, node)
-               );
-
-               context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+             if (krClosed.length) {
+               tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
+             }

            }
 
            }
 

+           if (services.improveOSM) {
+             var iOsmClosed = services.improveOSM.getClosedCounts();

 
 

-           function startFromNode(node) {
-               var startGraph = context.graph();
-               var way = osmWay({ tags: defaultTags });
-
-               context.perform(
-                   actionAddEntity(way),
-                   actionAddVertex(way.id, node.id)
-               );
-
-               context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+             for (itemType in iOsmClosed) {
+               tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
+             }

            }
 
            }
 

+           if (services.osmose) {
+             var osmoseClosed = services.osmose.getClosedCounts();

 
 

-           mode.enter = function() {
-               context.install(behavior);
-           };
+             for (itemType in osmoseClosed) {
+               tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
+             }
+           } // remove existing issue counts

 
 
 
 

-           mode.exit = function() {
-               context.uninstall(behavior);
-           };
+           for (var key in tags) {
+             if (key.match(/(^warnings:)|(^resolved:)/)) {
+               delete tags[key];
+             }
+           }

 
 

-           return mode;
-       }
+           function addIssueCounts(issues, prefix) {
+             var issuesByType = utilArrayGroupBy(issues, 'type');

 
 

-       function modeAddPoint(context, mode) {
+             for (var issueType in issuesByType) {
+               var issuesOfType = issuesByType[issueType];

 
 

-           mode.id = 'add-point';
+               if (issuesOfType[0].subtype) {
+                 var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');

 
 

-           var behavior = behaviorDraw(context)
-               .on('click', add)
-               .on('clickWay', addWay)
-               .on('clickNode', addNode)
-               .on('cancel', cancel)
-               .on('finish', cancel);
+                 for (var issueSubtype in issuesBySubtype) {
+                   var issuesOfSubtype = issuesBySubtype[issueSubtype];
+                   tags[prefix + ':' + issueType + ':' + issueSubtype] = context.cleanTagValue(issuesOfSubtype.length.toString());
+                 }
+               } else {
+                 tags[prefix + ':' + issueType] = context.cleanTagValue(issuesOfType.length.toString());
+               }
+             }
+           } // add counts of warnings generated by the user's edits

 
 

-           var defaultTags = {};
-           if (mode.preset) { defaultTags = mode.preset.setTags(defaultTags, 'point'); }

 
 

+           var warnings = context.validator().getIssuesBySeverity({
+             what: 'edited',
+             where: 'all',
+             includeIgnored: true,
+             includeDisabledRules: true
+           }).warning.filter(function (issue) {
+             return issue.type !== 'help_request';
+           }); // exclude 'fixme' and similar - #8603

 
 

-           function add(loc) {
-               var node = osmNode({ loc: loc, tags: defaultTags });
+           addIssueCounts(warnings, 'warnings'); // add counts of issues resolved by the user's edits

 
 

-               context.perform(
-                   actionAddEntity(node),
-                   _t('operations.add.annotation.point')
-               );
+           var resolvedIssues = context.validator().getResolvedIssues();
+           addIssueCounts(resolvedIssues, 'resolved');
+           context.changeset = context.changeset.update({
+             tags: tags
+           });
+         }

 
 

-               enterSelectMode(node);
-           }
+         function render(selection) {
+           var osm = context.connection();
+           if (!osm) return;
+           var header = selection.selectAll('.header').data([0]);
+           var headerTitle = header.enter().append('div').attr('class', 'header fillL');
+           headerTitle.append('div').append('h3').html(_t.html('commit.title'));
+           headerTitle.append('button').attr('class', 'close').on('click', function () {
+             dispatch.call('cancel', this);
+           }).call(svgIcon('#iD-icon-close'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body); // Changeset Section

 
 

+           var changesetSection = body.selectAll('.changeset-editor').data([0]);
+           changesetSection = changesetSection.enter().append('div').attr('class', 'modal-section changeset-editor').merge(changesetSection);
+           changesetSection.call(changesetEditor.changesetID(context.changeset.id).tags(context.changeset.tags)); // Warnings

 
 

-           function addWay(loc, edge) {
-               var node = osmNode({ tags: defaultTags });
+           body.call(commitWarnings); // Upload Explanation

 
 

-               context.perform(
-                   actionAddMidpoint({loc: loc, edge: edge}, node),
-                   _t('operations.add.annotation.vertex')
-               );
+           var saveSection = body.selectAll('.save-section').data([0]);
+           saveSection = saveSection.enter().append('div').attr('class', 'modal-section save-section fillL').merge(saveSection);
+           var prose = saveSection.selectAll('.commit-info').data([0]);

 
 

-               enterSelectMode(node);
+           if (prose.enter().size()) {
+             // first time, make sure to update user details in prose
+             _userDetails = null;

            }
 
            }
 

-           function enterSelectMode(node) {
-               context.enter(
-                   modeSelect(context, [node.id]).newFeature(true)
-               );
-           }
+           prose = prose.enter().append('p').attr('class', 'commit-info').html(_t.html('commit.upload_explanation')).merge(prose); // always check if this has changed, but only update prose.html()
+           // if needed, because it can trigger a style recalculation

 
 

+           osm.userDetails(function (err, user) {
+             if (err) return;
+             if (_userDetails === user) return; // no change

 
 

-           function addNode(node) {
-               if (Object.keys(defaultTags).length === 0) {
-                   enterSelectMode(node);
-                   return;
-               }
+             _userDetails = user;
+             var userLink = select(document.createElement('div'));

 
 

-               var tags = Object.assign({}, node.tags);  // shallow copy
-               for (var key in defaultTags) {
-                   tags[key] = defaultTags[key];
-               }
+             if (user.image_url) {
+               userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+             }

 
 

-               context.perform(
-                   actionChangeTags(node.id, tags),
-                   _t('operations.add.annotation.point')
-               );
+             userLink.append('a').attr('class', 'user-info').html(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
+             prose.html(_t.html('commit.upload_explanation_with_user', {
+               user: userLink.html()
+             }));
+           }); // Request Review

 
 

-               enterSelectMode(node);
-           }
+           var requestReview = saveSection.selectAll('.request-review').data([0]); // Enter

 
 

+           var requestReviewEnter = requestReview.enter().append('div').attr('class', 'request-review');
+           var requestReviewDomId = utilUniqueDomId('commit-input-request-review');
+           var labelEnter = requestReviewEnter.append('label').attr('for', requestReviewDomId);

 
 

-           function cancel() {
-               context.enter(modeBrowse(context));
+           if (!labelEnter.empty()) {
+             labelEnter.call(uiTooltip().title(_t.html('commit.request_review_info')).placement('top'));

            }
 
            }
 

+           labelEnter.append('input').attr('type', 'checkbox').attr('id', requestReviewDomId);
+           labelEnter.append('span').html(_t.html('commit.request_review')); // Update

 
 

-           mode.enter = function() {
-               context.install(behavior);
-           };
+           requestReview = requestReview.merge(requestReviewEnter);
+           var requestReviewInput = requestReview.selectAll('input').property('checked', isReviewRequested(context.changeset.tags)).on('change', toggleRequestReview); // Buttons

 
 

+           var buttonSection = saveSection.selectAll('.buttons').data([0]); // enter

 
 

-           mode.exit = function() {
-               context.uninstall(behavior);
-           };
+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons fillL');
+           buttonEnter.append('button').attr('class', 'secondary-action button cancel-button').append('span').attr('class', 'label').html(_t.html('commit.cancel'));
+           var uploadButton = buttonEnter.append('button').attr('class', 'action button save-button');
+           uploadButton.append('span').attr('class', 'label').html(_t.html('commit.save'));
+           var uploadBlockerTooltipText = getUploadBlockerMessage(); // update

 
 

+           buttonSection = buttonSection.merge(buttonEnter);
+           buttonSection.selectAll('.cancel-button').on('click.cancel', function () {
+             dispatch.call('cancel', this);
+           });
+           buttonSection.selectAll('.save-button').classed('disabled', uploadBlockerTooltipText !== null).on('click.save', function () {
+             if (!select(this).classed('disabled')) {
+               this.blur(); // avoid keeping focus on the button - #4641

 
 

-           return mode;
-       }
+               for (var key in context.changeset.tags) {
+                 // remove any empty keys before upload
+                 if (!key) delete context.changeset.tags[key];
+               }

 
 

-       function modeAddNote(context) {
-           var mode = {
-               id: 'add-note',
-               button: 'note',
-               title: _t('modes.add_note.title'),
-               description: _t('modes.add_note.description'),
-               key: _t('modes.add_note.key')
-           };
+               context.uploader().save(context.changeset);
+             }
+           }); // remove any existing tooltip

 
 

-           var behavior = behaviorDraw(context)
-               .on('click', add)
-               .on('cancel', cancel)
-               .on('finish', cancel);
+           uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));

 
 

+           if (uploadBlockerTooltipText) {
+             buttonSection.selectAll('.save-button').call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
+           } // Raw Tag Editor

 
 

-           function add(loc) {
-               var osm = services.osm;
-               if (!osm) { return; }

 
 

-               var note = osmNote({ loc: loc, status: 'open', comments: [] });
-               osm.replaceNote(note);
+           var tagSection = body.selectAll('.tag-section.raw-tag-editor').data([0]);
+           tagSection = tagSection.enter().append('div').attr('class', 'modal-section tag-section raw-tag-editor').merge(tagSection);
+           tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
+           .render);
+           var changesSection = body.selectAll('.commit-changes-section').data([0]);
+           changesSection = changesSection.enter().append('div').attr('class', 'modal-section commit-changes-section').merge(changesSection); // Change summary

 
 

-               // force a reraw (there is no history change that would otherwise do this)
-               context.map().pan([0,0]);
+           changesSection.call(commitChanges.render);

 
 

-               context
-                   .selectedNoteID(note.id)
-                   .enter(modeSelectNote(context, note.id).newFeature(true));
+           function toggleRequestReview() {
+             var rr = requestReviewInput.property('checked');
+             updateChangeset({
+               review_requested: rr ? 'yes' : undefined
+             });
+             tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
+             .render);

            }
            }

+         }

 
 

+         function getUploadBlockerMessage() {
+           var errors = context.validator().getIssuesBySeverity({
+             what: 'edited',
+             where: 'all'
+           }).error;

 
 

-           function cancel() {
-               context.enter(modeBrowse(context));
-           }
-
+           if (errors.length) {
+             return _t('commit.outstanding_errors_message', {
+               count: errors.length
+             });
+           } else {
+             var hasChangesetComment = context.changeset && context.changeset.tags.comment && context.changeset.tags.comment.trim().length;

 
 

-           mode.enter = function() {
-               context.install(behavior);
-           };
+             if (!hasChangesetComment) {
+               return _t('commit.comment_needed_message');
+             }
+           }

 
 

+           return null;
+         }

 
 

-           mode.exit = function() {
-               context.uninstall(behavior);
-           };
+         function changeTags(_, changed, onInput) {
+           if (changed.hasOwnProperty('comment')) {
+             if (changed.comment === undefined) {
+               changed.comment = '';
+             }

 
 

+             if (!onInput) {
+               corePreferences('comment', changed.comment);
+               corePreferences('commentDate', Date.now());
+             }
+           }

 
 

-           return mode;
-       }
+           if (changed.hasOwnProperty('source')) {
+             if (changed.source === undefined) {
+               corePreferences('source', null);
+             } else if (!onInput) {
+               corePreferences('source', changed.source);
+               corePreferences('commentDate', Date.now());
+             }
+           } // no need to update `prefs` for `hashtags` here since it's done in `updateChangeset`

 
 

-       function uiConflicts(context) {
-           var dispatch$1 = dispatch('cancel', 'save');
-           var keybinding = utilKeybinding('conflicts');
-           var _origChanges;
-           var _conflictList;
-           var _shownConflictIndex;

 
 

+           updateChangeset(changed, onInput);

 
 

-           function keybindingOn() {
-               select(document)
-                   .call(keybinding.on('⎋', cancel, true));
+           if (_selection) {
+             _selection.call(render);

            }
            }

+         }

 
 

-           function keybindingOff() {
-               select(document)
-                   .call(keybinding.unbind);
-           }
+         function findHashtags(tags, commentOnly) {
+           var detectedHashtags = commentHashtags();

 
 

-           function tryAgain() {
-               keybindingOff();
-               dispatch$1.call('save');
+           if (detectedHashtags.length) {
+             // always remove stored hashtags if there are hashtags in the comment - #4304
+             corePreferences('hashtags', null);

            }
 
            }
 

-           function cancel() {
-               keybindingOff();
-               dispatch$1.call('cancel');
+           if (!detectedHashtags.length || !commentOnly) {
+             detectedHashtags = detectedHashtags.concat(hashtagHashtags());

            }
 
            }
 

+           var allLowerCase = new Set();
+           return detectedHashtags.filter(function (hashtag) {
+             // Compare tags as lowercase strings, but keep original case tags
+             var lowerCase = hashtag.toLowerCase();

 
 

-           function conflicts(selection) {
-               keybindingOn();
+             if (!allLowerCase.has(lowerCase)) {
+               allLowerCase.add(lowerCase);
+               return true;
+             }

 
 

-               var headerEnter = selection.selectAll('.header')
-                   .data([0])
-                   .enter()
-                   .append('div')
-                   .attr('class', 'header fillL');
+             return false;
+           }); // Extract hashtags from `comment`

 
 

-               headerEnter
-                   .append('button')
-                   .attr('class', 'fr')
-                   .on('click', cancel)
-                   .call(svgIcon('#iD-icon-close'));
+           function commentHashtags() {
+             var matches = (tags.comment || '').replace(/http\S*/g, '') // drop anything that looks like a URL - #4289
+             .match(hashtagRegex);
+             return matches || [];
+           } // Extract and clean hashtags from `hashtags`

 
 

-               headerEnter
-                   .append('h3')
-                   .text(_t('save.conflict.header'));

 
 

-               var bodyEnter = selection.selectAll('.body')
-                   .data([0])
-                   .enter()
-                   .append('div')
-                   .attr('class', 'body fillL');
+           function hashtagHashtags() {
+             var matches = (tags.hashtags || '').split(/[,;\s]+/).map(function (s) {
+               if (s[0] !== '#') {
+                 s = '#' + s;
+               } // prepend '#'

 
 

-               var conflictsHelpEnter = bodyEnter
-                   .append('div')
-                   .attr('class', 'conflicts-help')
-                   .text(_t('save.conflict.help'));

 
 

+               var matched = s.match(hashtagRegex);
+               return matched && matched[0];
+             }).filter(Boolean); // exclude falsy

 
 

-               // Download changes link
-               var detected = utilDetect();
-               var changeset = new osmChangeset();
+             return matches || [];
+           }
+         }

 
 

-               delete changeset.id;  // Export without changeset_id
+         function isReviewRequested(tags) {
+           var rr = tags.review_requested;
+           if (rr === undefined) return false;
+           rr = rr.trim().toLowerCase();
+           return !(rr === '' || rr === 'no');
+         }

 
 

-               var data = JXON.stringify(changeset.osmChangeJXON(_origChanges));
-               var blob = new Blob([data], { type: 'text/xml;charset=utf-8;' });
-               var fileName = 'changes.osc';
+         function updateChangeset(changed, onInput) {
+           var tags = Object.assign({}, context.changeset.tags); // shallow copy

 
 

-               var linkEnter = conflictsHelpEnter.selectAll('.download-changes')
-                   .append('a')
-                   .attr('class', 'download-changes');
+           Object.keys(changed).forEach(function (k) {
+             var v = changed[k];
+             k = context.cleanTagKey(k);
+             if (readOnlyTags.indexOf(k) !== -1) return;

 
 

-               if (detected.download) {      // All except IE11 and Edge
-                   linkEnter                 // download the data as a file
-                       .attr('href', window.URL.createObjectURL(blob))
-                       .attr('download', fileName);
+             if (v === undefined) {
+               delete tags[k];
+             } else if (onInput) {
+               tags[k] = v;
+             } else {
+               tags[k] = context.cleanTagValue(v);
+             }
+           });

 
 

-               } else {                      // IE11 and Edge
-                   linkEnter                 // open data uri in a new tab
-                       .attr('target', '_blank')
-                       .on('click.download', function() {
-                           navigator.msSaveBlob(blob, fileName);
-                       });
-               }
+           if (!onInput) {
+             // when changing the comment, override hashtags with any found in comment.
+             var commentOnly = changed.hasOwnProperty('comment') && changed.comment !== '';
+             var arr = findHashtags(tags, commentOnly);

 
 

-               linkEnter
-                   .call(svgIcon('#iD-icon-load', 'inline'))
-                   .append('span')
-                   .text(_t('save.conflict.download_changes'));
+             if (arr.length) {
+               tags.hashtags = context.cleanTagValue(arr.join(';'));
+               corePreferences('hashtags', tags.hashtags);
+             } else {
+               delete tags.hashtags;
+               corePreferences('hashtags', null);
+             }
+           } // always update userdetails, just in case user reauthenticates as someone else

 
 
 
 

-               bodyEnter
-                   .append('div')
-                   .attr('class', 'conflict-container fillL3')
-                   .call(showConflict, 0);
+           if (_userDetails && _userDetails.changesets_count !== undefined) {
+             var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1; // #4283

 
 

-               bodyEnter
-                   .append('div')
-                   .attr('class', 'conflicts-done')
-                   .attr('opacity', 0)
-                   .style('display', 'none')
-                   .text(_t('save.conflict.done'));
+             tags.changesets_count = String(changesetsCount); // first 100 edits - new user

 
 

-               var buttonsEnter = bodyEnter
-                   .append('div')
-                   .attr('class','buttons col12 joined conflicts-buttons');
+             if (changesetsCount <= 100) {
+               var s;
+               s = corePreferences('walkthrough_completed');

 
 

-               buttonsEnter
-                   .append('button')
-                   .attr('disabled', _conflictList.length > 1)
-                   .attr('class', 'action conflicts-button col6')
-                   .text(_t('save.title'))
-                   .on('click.try_again', tryAgain);
+               if (s) {
+                 tags['ideditor:walkthrough_completed'] = s;
+               }

 
 

-               buttonsEnter
-                   .append('button')
-                   .attr('class', 'secondary-action conflicts-button col6')
-                   .text(_t('confirm.cancel'))
-                   .on('click.cancel', cancel);
-           }
+               s = corePreferences('walkthrough_progress');

 
 

+               if (s) {
+                 tags['ideditor:walkthrough_progress'] = s;
+               }

 
 

-           function showConflict(selection, index) {
-               index = utilWrap(index, _conflictList.length);
-               _shownConflictIndex = index;
+               s = corePreferences('walkthrough_started');

 
 

-               var parent = select(selection.node().parentNode);
+               if (s) {
+                 tags['ideditor:walkthrough_started'] = s;
+               }
+             }
+           } else {
+             delete tags.changesets_count;
+           }

 
 

-               // enable save button if this is the last conflict being reviewed..
-               if (index === _conflictList.length - 1) {
-                   window.setTimeout(function() {
-                       parent.select('.conflicts-button')
-                           .attr('disabled', null);
+           if (!fastDeepEqual(context.changeset.tags, tags)) {
+             context.changeset = context.changeset.update({
+               tags: tags
+             });
+           }
+         }

 
 

-                       parent.select('.conflicts-done')
-                           .transition()
-                           .attr('opacity', 1)
-                           .style('display', 'block');
-                   }, 250);
-               }
+         commit.reset = function () {
+           context.changeset = null;
+         };

 
 

-               var conflict = selection
-                   .selectAll('.conflict')
-                   .data([_conflictList[index]]);
+         return utilRebind(commit, dispatch, 'on');
+       }

 
 

-               conflict.exit()
-                   .remove();
+       // for punction see https://stackoverflow.com/a/21224179

 
 

-               var conflictEnter = conflict.enter()
-                   .append('div')
-                   .attr('class', 'conflict');
-
-               conflictEnter
-                   .append('h4')
-                   .attr('class', 'conflict-count')
-                   .text(_t('save.conflict.count', { num: index + 1, total: _conflictList.length }));
-
-               conflictEnter
-                   .append('a')
-                   .attr('class', 'conflict-description')
-                   .attr('href', '#')
-                   .text(function(d) { return d.name; })
-                   .on('click', function(d) {
-                       event.preventDefault();
-                       zoomToEntity(d.id);
-                   });
+       function simplify(str) {
+         if (typeof str !== 'string') return '';
+         return diacritics.remove(str.replace(/&/g, 'and').replace(/İ/ig, 'i').replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>«»~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u200b-\u200f\u2016\u2017\u2020-\u2027\u2030-\u2038\u203b-\u203e\u2041-\u2043\u2047-\u2051\u2053\u2055-\u205e\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00\u2e01\u2e06-\u2e08\u2e0b\u2e0e-\u2e16\u2e18\u2e19\u2e1b\u2e1e\u2e1f\u2e2a-\u2e2e\u2e30-\u2e39\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\ufeff\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g, '').toLowerCase());
+       }

 
 

-               var details = conflictEnter
-                   .append('div')
-                   .attr('class', 'conflict-detail-container');
+       // `resolveStrings`
+       // Resolves the text strings for a given community index item
+       //
+       // Arguments
+       //   `item`:  Object containing the community index item
+       //   `defaults`: Object containing the community index default strings
+       //   `localizerFn?`: optional function we will call to do the localization.
+       //      This function should be like the iD `t()` function that
+       //      accepts a `stringID` and returns a localized string
+       //
+       // Returns
+       //   An Object containing all the resolved strings:
+       //   {
+       //     name:                     'talk-ru Mailing List',
+       //     url:                      'https://lists.openstreetmap.org/listinfo/talk-ru',
+       //     signupUrl:                'https://example.url/signup',
+       //     description:              'A one line description',
+       //     extendedDescription:      'Extended description',
+       //     nameHTML:                 '<a href="the url">the name</a>',
+       //     urlHTML:                  '<a href="the url">the url</a>',
+       //     signupUrlHTML:            '<a href="the signupUrl">the signupUrl</a>',
+       //     descriptionHTML:          the description, with urls and signupUrls linkified,
+       //     extendedDescriptionHTML:  the extendedDescription with urls and signupUrls linkified
+       //   }
+       //

 
 

-               details
-                   .append('ul')
-                   .attr('class', 'conflict-detail-list')
-                   .selectAll('li')
-                   .data(function(d) { return d.details || []; })
-                   .enter()
-                   .append('li')
-                   .attr('class', 'conflict-detail-item')
-                   .html(function(d) { return d; });
+       function resolveStrings(item, defaults, localizerFn) {
+         var itemStrings = Object.assign({}, item.strings); // shallow clone

 
 

-               details
-                   .append('div')
-                   .attr('class', 'conflict-choices')
-                   .call(addChoices);
+         var defaultStrings = Object.assign({}, defaults[item.type]); // shallow clone

 
 

-               details
-                   .append('div')
-                   .attr('class', 'conflict-nav-buttons joined cf')
-                   .selectAll('button')
-                   .data(['previous', 'next'])
-                   .enter()
-                   .append('button')
-                   .text(function(d) { return _t('save.conflict.' + d); })
-                   .attr('class', 'conflict-nav-button action col6')
-                   .attr('disabled', function(d, i) {
-                       return (i === 0 && index === 0) ||
-                           (i === 1 && index === _conflictList.length - 1) || null;
-                   })
-                   .on('click', function(d, i) {
-                       event.preventDefault();
-
-                       var container = parent.selectAll('.conflict-container');
-                       var sign = (i === 0 ? -1 : 1);
-
-                       container
-                           .selectAll('.conflict')
-                           .remove();
-
-                       container
-                           .call(showConflict, index + sign);
-                   });
+         var anyToken = new RegExp(/(\{\w+\})/, 'gi'); // Pre-localize the item and default strings

 
 

+         if (localizerFn) {
+           if (itemStrings.community) {
+             var communityID = simplify(itemStrings.community);
+             itemStrings.community = localizerFn("_communities.".concat(communityID));

            }
 
            }
 

+           ['name', 'description', 'extendedDescription'].forEach(function (prop) {
+             if (defaultStrings[prop]) defaultStrings[prop] = localizerFn("_defaults.".concat(item.type, ".").concat(prop));
+             if (itemStrings[prop]) itemStrings[prop] = localizerFn("".concat(item.id, ".").concat(prop));
+           });
+         }

 
 

-           function addChoices(selection) {
-               var choices = selection
-                   .append('ul')
-                   .attr('class', 'layer-list')
-                   .selectAll('li')
-                   .data(function(d) { return d.choices || []; });
-
-               // enter
-               var choicesEnter = choices.enter()
-                   .append('li')
-                   .attr('class', 'layer');
+         var replacements = {
+           account: item.account,
+           community: itemStrings.community,
+           signupUrl: itemStrings.signupUrl,
+           url: itemStrings.url
+         }; // Resolve URLs first (which may refer to {account})

 
 

-               var labelEnter = choicesEnter
-                   .append('label');
+         if (!replacements.signupUrl) {
+           replacements.signupUrl = resolve(itemStrings.signupUrl || defaultStrings.signupUrl);
+         }

 
 

-               labelEnter
-                   .append('input')
-                   .attr('type', 'radio')
-                   .attr('name', function(d) { return d.id; })
-                   .on('change', function(d, i) {
-                       var ul = this.parentNode.parentNode.parentNode;
-                       ul.__data__.chosen = i;
-                       choose(ul, d);
-                   });
+         if (!replacements.url) {
+           replacements.url = resolve(itemStrings.url || defaultStrings.url);
+         }

 
 

-               labelEnter
-                   .append('span')
-                   .text(function(d) { return d.text; });
-
-               // update
-               choicesEnter
-                   .merge(choices)
-                   .each(function(d, i) {
-                       var ul = this.parentNode;
-                       if (ul.__data__.chosen === i) {
-                           choose(ul, d);
-                       }
-                   });
-           }
+         var resolved = {
+           name: resolve(itemStrings.name || defaultStrings.name),
+           url: resolve(itemStrings.url || defaultStrings.url),
+           signupUrl: resolve(itemStrings.signupUrl || defaultStrings.signupUrl),
+           description: resolve(itemStrings.description || defaultStrings.description),
+           extendedDescription: resolve(itemStrings.extendedDescription || defaultStrings.extendedDescription)
+         }; // Generate linkified strings

 
 

+         resolved.nameHTML = linkify(resolved.url, resolved.name);
+         resolved.urlHTML = linkify(resolved.url);
+         resolved.signupUrlHTML = linkify(resolved.signupUrl);
+         resolved.descriptionHTML = resolve(itemStrings.description || defaultStrings.description, true);
+         resolved.extendedDescriptionHTML = resolve(itemStrings.extendedDescription || defaultStrings.extendedDescription, true);
+         return resolved;

 
 

-           function choose(ul, datum) {
-               if (event) { event.preventDefault(); }
+         function resolve(s, addLinks) {
+           if (!s) return undefined;
+           var result = s;

 
 

-               select(ul)
-                   .selectAll('li')
-                   .classed('active', function(d) { return d === datum; })
-                   .selectAll('input')
-                   .property('checked', function(d) { return d === datum; });
+           for (var key in replacements) {
+             var token = "{".concat(key, "}");
+             var regex = new RegExp(token, 'g');

 
 

-               var extent = geoExtent();
-               var entity;
+             if (regex.test(result)) {
+               var replacement = replacements[key];

 
 

-               entity = context.graph().hasEntity(datum.id);
-               if (entity) { extent._extend(entity.extent(context.graph())); }
+               if (!replacement) {
+                 throw new Error("Cannot resolve token: ".concat(token));
+               } else {
+                 if (addLinks && (key === 'signupUrl' || key === 'url')) {
+                   replacement = linkify(replacement);
+                 }

 
 

-               datum.action();
+                 result = result.replace(regex, replacement);
+               }
+             }
+           } // There shouldn't be any leftover tokens in a resolved string

 
 

-               entity = context.graph().hasEntity(datum.id);
-               if (entity) { extent._extend(entity.extent(context.graph())); }

 
 

-               zoomToEntity(datum.id, extent);
-           }
+           var leftovers = result.match(anyToken);

 
 

+           if (leftovers) {
+             throw new Error("Cannot resolve tokens: ".concat(leftovers));
+           } // Linkify subreddits like `/r/openstreetmap`
+           // https://github.com/osmlab/osm-community-index/issues/82
+           // https://github.com/openstreetmap/iD/issues/4997

 
 

-           function zoomToEntity(id, extent) {
-               context.surface().selectAll('.hover')
-                   .classed('hover', false);

 
 

-               var entity = context.graph().hasEntity(id);
-               if (entity) {
-                   if (extent) {
-                       context.map().trimmedExtent(extent);
-                   } else {
-                       context.map().zoomToEase(entity);
-                   }
-                   context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph()))
-                       .classed('hover', true);
-               }
+           if (addLinks && item.type === 'reddit') {
+             result = result.replace(/(\/r\/\w+\/*)/i, function (match) {
+               return linkify(resolved.url, match);
+             });

            }
 
            }
 

+           return result;
+         }

 
 

-           // The conflict list should be an array of objects like:
-           // {
-           //     id: id,
-           //     name: entityName(local),
-           //     details: merge.conflicts(),
-           //     chosen: 1,
-           //     choices: [
-           //         choice(id, keepMine, forceLocal),
-           //         choice(id, keepTheirs, forceRemote)
-           //     ]
-           // }
-           conflicts.conflictList = function(_) {
-               if (!arguments.length) { return _conflictList; }
-               _conflictList = _;
-               return conflicts;
-           };
+         function linkify(url, text) {
+           if (!url) return undefined;
+           text = text || url;
+           return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
+         }
+       }

 
 

+       var _oci = null;
+       function uiSuccess(context) {
+         var MAXEVENTS = 2;
+         var dispatch = dispatch$8('cancel');

 
 

-           conflicts.origChanges = function(_) {
-               if (!arguments.length) { return _origChanges; }
-               _origChanges = _;
-               return conflicts;
-           };
+         var _changeset;

 
 

+         var _location;

 
 

-           conflicts.shownEntityIds = function() {
-               if (_conflictList && typeof _shownConflictIndex === 'number') {
-                   return [_conflictList[_shownConflictIndex].id];
-               }
-               return [];
-           };
+         ensureOSMCommunityIndex(); // start fetching the data

 
 

+         function ensureOSMCommunityIndex() {
+           var data = _mainFileFetcher;
+           return Promise.all([data.get('oci_features'), data.get('oci_resources'), data.get('oci_defaults')]).then(function (vals) {
+             if (_oci) return _oci; // Merge Custom Features

 
 

-           return utilRebind(conflicts, dispatch$1, 'on');
-       }
+             if (vals[0] && Array.isArray(vals[0].features)) {
+               _mainLocations.mergeCustomGeoJSON(vals[0]);
+             }

 
 

-       function uiConfirm(selection) {
-           var modalSelection = uiModal(selection);
+             var ociResources = Object.values(vals[1].resources);

 
 

-           modalSelection.select('.modal')
-               .classed('modal-alert', true);
+             if (ociResources.length) {
+               // Resolve all locationSet features.
+               return _mainLocations.mergeLocationSets(ociResources).then(function () {
+                 _oci = {
+                   resources: ociResources,
+                   defaults: vals[2].defaults
+                 };
+                 return _oci;
+               });
+             } else {
+               _oci = {
+                 resources: [],
+                 // no resources?
+                 defaults: vals[2].defaults
+               };
+               return _oci;
+             }
+           });
+         } // string-to-date parsing in JavaScript is weird

 
 

-           var section = modalSelection.select('.content');

 
 

-           section.append('div')
-               .attr('class', 'modal-section header');
+         function parseEventDate(when) {
+           if (!when) return;
+           var raw = when.trim();
+           if (!raw) return;
+
+           if (!/Z$/.test(raw)) {
+             // if no trailing 'Z', add one
+             raw += 'Z'; // this forces date to be parsed as a UTC date
+           }

 
 

-           section.append('div')
-               .attr('class', 'modal-section message-text');
+           var parsed = new Date(raw);
+           return new Date(parsed.toUTCString().substr(0, 25)); // convert to local timezone
+         }

 
 

-           var buttons = section.append('div')
-               .attr('class', 'modal-section buttons cf');
+         function success(selection) {
+           var header = selection.append('div').attr('class', 'header fillL');
+           header.append('h3').html(_t.html('success.just_edited'));
+           header.append('button').attr('class', 'close').on('click', function () {
+             return dispatch.call('cancel');
+           }).call(svgIcon('#iD-icon-close'));
+           var body = selection.append('div').attr('class', 'body save-success fillL');
+           var summary = body.append('div').attr('class', 'save-summary');
+           summary.append('h3').html(_t.html('success.thank_you' + (_location ? '_location' : ''), {
+             where: _location
+           }));
+           summary.append('p').html(_t.html('success.help_html')).append('a').attr('class', 'link-out').attr('target', '_blank').attr('href', _t('success.help_link_url')).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('success.help_link_text'));
+           var osm = context.connection();
+           if (!osm) return;
+           var changesetURL = osm.changesetURL(_changeset.id);
+           var table = summary.append('table').attr('class', 'summary-table');
+           var row = table.append('tr').attr('class', 'summary-row');
+           row.append('td').attr('class', 'cell-icon summary-icon').append('a').attr('target', '_blank').attr('href', changesetURL).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', '#iD-logo-osm');
+           var summaryDetail = row.append('td').attr('class', 'cell-detail summary-detail');
+           summaryDetail.append('a').attr('class', 'cell-detail summary-view-on-osm').attr('target', '_blank').attr('href', changesetURL).html(_t.html('success.view_on_osm'));
+           summaryDetail.append('div').html(_t.html('success.changeset_id', {
+             changeset_id: "<a href=\"".concat(changesetURL, "\" target=\"_blank\">").concat(_changeset.id, "</a>")
+           })); // Get OSM community index features intersecting the map..
+
+           ensureOSMCommunityIndex().then(function (oci) {
+             var loc = context.map().center();
+             var validLocations = _mainLocations.locationsAt(loc); // Gather the communities
+
+             var communities = [];
+             oci.resources.forEach(function (resource) {
+               var area = validLocations[resource.locationSetID];
+               if (!area) return; // Resolve strings
+
+               var localizer = function localizer(stringID) {
+                 return _t.html("community.".concat(stringID));
+               };

 
 

+               resource.resolved = resolveStrings(resource, oci.defaults, localizer);
+               communities.push({
+                 area: area,
+                 order: resource.order || 0,
+                 resource: resource
+               });
+             }); // sort communities by feature area ascending, community order descending

 
 

-           modalSelection.okButton = function() {
-               buttons
-                   .append('button')
-                   .attr('class', 'button ok-button action')
-                   .on('click.confirm', function() {
-                       modalSelection.remove();
-                   })
-                   .text(_t('confirm.okay'))
-                   .node()
-                   .focus();
+             communities.sort(function (a, b) {
+               return a.area - b.area || b.order - a.order;
+             });
+             body.call(showCommunityLinks, communities.map(function (c) {
+               return c.resource;
+             }));
+           });
+         }

 
 

-               return modalSelection;
-           };
+         function showCommunityLinks(selection, resources) {
+           var communityLinks = selection.append('div').attr('class', 'save-communityLinks');
+           communityLinks.append('h3').html(_t.html('success.like_osm'));
+           var table = communityLinks.append('table').attr('class', 'community-table');
+           var row = table.selectAll('.community-row').data(resources);
+           var rowEnter = row.enter().append('tr').attr('class', 'community-row');
+           rowEnter.append('td').attr('class', 'cell-icon community-icon').append('a').attr('target', '_blank').attr('href', function (d) {
+             return d.resolved.url;
+           }).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', function (d) {
+             return "#community-".concat(d.type);
+           });
+           var communityDetail = rowEnter.append('td').attr('class', 'cell-detail community-detail');
+           communityDetail.each(showCommunityDetails);
+           communityLinks.append('div').attr('class', 'community-missing').html(_t.html('success.missing')).append('a').attr('class', 'link-out').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmlab/osm-community-index/issues').append('span').html(_t.html('success.tell_us'));
+         }

 
 

+         function showCommunityDetails(d) {
+           var selection = select(this);
+           var communityID = d.id;
+           selection.append('div').attr('class', 'community-name').html(d.resolved.nameHTML);
+           selection.append('div').attr('class', 'community-description').html(d.resolved.descriptionHTML); // Create an expanding section if any of these are present..
+
+           if (d.resolved.extendedDescriptionHTML || d.languageCodes && d.languageCodes.length) {
+             selection.append('div').call(uiDisclosure(context, "community-more-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.more')).content(showMore));
+           }
+
+           var nextEvents = (d.events || []).map(function (event) {
+             event.date = parseEventDate(event.when);
+             return event;
+           }).filter(function (event) {
+             // date is valid and future (or today)
+             var t = event.date.getTime();
+             var now = new Date().setHours(0, 0, 0, 0);
+             return !isNaN(t) && t >= now;
+           }).sort(function (a, b) {
+             // sort by date ascending
+             return a.date < b.date ? -1 : a.date > b.date ? 1 : 0;
+           }).slice(0, MAXEVENTS); // limit number of events shown

 
 

-           return modalSelection;
-       }
+           if (nextEvents.length) {
+             selection.append('div').call(uiDisclosure(context, "community-events-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.events')).content(showNextEvents)).select('.hide-toggle').append('span').attr('class', 'badge-text').html(nextEvents.length);
+           }

 
 

-       function uiChangesetEditor(context) {
-           var dispatch$1 = dispatch('change');
-           var formFields = uiFormFields(context);
-           var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
-           var _fieldsArr;
-           var _tags;
-           var _changesetID;
+           function showMore(selection) {
+             var more = selection.selectAll('.community-more').data([0]);
+             var moreEnter = more.enter().append('div').attr('class', 'community-more');

 
 

+             if (d.resolved.extendedDescriptionHTML) {
+               moreEnter.append('div').attr('class', 'community-extended-description').html(d.resolved.extendedDescriptionHTML);
+             }

 
 

-           function changesetEditor(selection) {
-               render(selection);
+             if (d.languageCodes && d.languageCodes.length) {
+               var languageList = d.languageCodes.map(function (code) {
+                 return _mainLocalizer.languageName(code);
+               }).join(', ');
+               moreEnter.append('div').attr('class', 'community-languages').html(_t.html('success.languages', {
+                 languages: languageList
+               }));
+             }

            }
 
            }
 

+           function showNextEvents(selection) {
+             var events = selection.append('div').attr('class', 'community-events');
+             var item = events.selectAll('.community-event').data(nextEvents);
+             var itemEnter = item.enter().append('div').attr('class', 'community-event');
+             itemEnter.append('div').attr('class', 'community-event-name').append('a').attr('target', '_blank').attr('href', function (d) {
+               return d.url;
+             }).html(function (d) {
+               var name = d.name;
+
+               if (d.i18n && d.id) {
+                 name = _t("community.".concat(communityID, ".events.").concat(d.id, ".name"), {
+                   "default": name
+                 });
+               }

 
 

-           function render(selection) {
-               var initial = false;
+               return name;
+             });
+             itemEnter.append('div').attr('class', 'community-event-when').html(function (d) {
+               var options = {
+                 weekday: 'short',
+                 day: 'numeric',
+                 month: 'short',
+                 year: 'numeric'
+               };

 
 

-               if (!_fieldsArr) {
-                   initial = true;
-                   var presets = _mainPresetIndex;
+               if (d.date.getHours() || d.date.getMinutes()) {
+                 // include time if it has one
+                 options.hour = 'numeric';
+                 options.minute = 'numeric';
+               }

 
 

-                   _fieldsArr = [
-                       uiField(context, presets.field('comment'), null, { show: true, revert: false }),
-                       uiField(context, presets.field('source'), null, { show: false, revert: false }),
-                       uiField(context, presets.field('hashtags'), null, { show: false, revert: false }) ];
+               return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
+             });
+             itemEnter.append('div').attr('class', 'community-event-where').html(function (d) {
+               var where = d.where;

 
 

-                   _fieldsArr.forEach(function(field) {
-                       field
-                           .on('change', function(t, onInput) {
-                               dispatch$1.call('change', field, undefined, t, onInput);
-                           });
-                   });
+               if (d.i18n && d.id) {
+                 where = _t("community.".concat(communityID, ".events.").concat(d.id, ".where"), {
+                   "default": where
+                 });

                }
 
                }
 

-               _fieldsArr.forEach(function(field) {
-                   field
-                       .tags(_tags);
-               });
+               return where;
+             });
+             itemEnter.append('div').attr('class', 'community-event-description').html(function (d) {
+               var description = d.description;

 
 

+               if (d.i18n && d.id) {
+                 description = _t("community.".concat(communityID, ".events.").concat(d.id, ".description"), {
+                   "default": description
+                 });
+               }

 
 

-               selection
-                   .call(formFields.fieldsArr(_fieldsArr));
+               return description;
+             });
+           }
+         }

 
 

+         success.changeset = function (val) {
+           if (!arguments.length) return _changeset;
+           _changeset = val;
+           return success;
+         };

 
 

-               if (initial) {
-                   var commentField = selection.select('.form-field-comment textarea');
-                   var commentNode = commentField.node();
+         success.location = function (val) {
+           if (!arguments.length) return _location;
+           _location = val;
+           return success;
+         };

 
 

-                   if (commentNode) {
-                       commentNode.focus();
-                       commentNode.select();
-                   }
+         return utilRebind(success, dispatch, 'on');
+       }

 
 

-                   // trigger a 'blur' event so that comment field can be cleaned
-                   // and checked for hashtags, even if retrieved from localstorage
-                   utilTriggerEvent(commentField, 'blur');
+       function modeSave(context) {
+         var mode = {
+           id: 'save'
+         };
+         var keybinding = utilKeybinding('modeSave');
+         var commit = uiCommit(context).on('cancel', cancel);

 
 

-                   var osm = context.connection();
-                   if (osm) {
-                       osm.userChangesets(function (err, changesets) {
-                           if (err) { return; }
-
-                           var comments = changesets.map(function(changeset) {
-                               var comment = changeset.tags.comment;
-                               return comment ? { title: comment, value: comment } : null;
-                           }).filter(Boolean);
-
-                           commentField
-                               .call(commentCombo
-                                   .data(utilArrayUniqBy(comments, 'title'))
-                               );
-                       });
-                   }
-               }
+         var _conflictsUi; // uiConflicts

 
 

-               // Add warning if comment mentions Google
-               var hasGoogle = _tags.comment.match(/google/i);
-               var commentWarning = selection.select('.form-field-comment').selectAll('.comment-warning')
-                   .data(hasGoogle ? [0] : []);

 
 

-               commentWarning.exit()
-                   .transition()
-                   .duration(200)
-                   .style('opacity', 0)
-                   .remove();
+         var _location;

 
 

-               var commentEnter = commentWarning.enter()
-                   .insert('div', '.tag-reference-body')
-                   .attr('class', 'field-warning comment-warning')
-                   .style('opacity', 0);
+         var _success;

 
 

-               commentEnter
-                   .append('a')
-                   .attr('target', '_blank')
-                   .attr('tabindex', -1)
-                   .call(svgIcon('#iD-icon-alert', 'inline'))
-                   .attr('href', _t('commit.google_warning_link'))
-                   .append('span')
-                   .text(_t('commit.google_warning'));
+         var uploader = context.uploader().on('saveStarted.modeSave', function () {
+           keybindingOff();
+         }) // fire off some async work that we want to be ready later
+         .on('willAttemptUpload.modeSave', prepareForSuccess).on('progressChanged.modeSave', showProgress).on('resultNoChanges.modeSave', function () {
+           cancel();
+         }).on('resultErrors.modeSave', showErrors).on('resultConflicts.modeSave', showConflicts).on('resultSuccess.modeSave', showSuccess);

 
 

-               commentEnter
-                   .transition()
-                   .duration(200)
-                   .style('opacity', 1);
-           }
+         function cancel() {
+           context.enter(modeBrowse(context));
+         }

 
 

+         function showProgress(num, total) {
+           var modal = context.container().select('.loading-modal .modal-section');
+           var progress = modal.selectAll('.progress').data([0]); // enter/update
+
+           progress.enter().append('div').attr('class', 'progress').merge(progress).text(_t('save.conflict_progress', {
+             num: num,
+             total: total
+           }));
+         }
+
+         function showConflicts(changeset, conflicts, origChanges) {
+           var selection = context.container().select('.sidebar').append('div').attr('class', 'sidebar-component');
+           context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
+           _conflictsUi = uiConflicts(context).conflictList(conflicts).origChanges(origChanges).on('cancel', function () {
+             context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+             selection.remove();
+             keybindingOn();
+             uploader.cancelConflictResolution();
+           }).on('save', function () {
+             context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+             selection.remove();
+             uploader.processResolvedConflicts(changeset);
+           });
+           selection.call(_conflictsUi);
+         }
+
+         function showErrors(errors) {
+           keybindingOn();
+           var selection = uiConfirm(context.container());
+           selection.select('.modal-section.header').append('h3').text(_t('save.error'));
+           addErrors(selection, errors);
+           selection.okButton();
+         }
+
+         function addErrors(selection, data) {
+           var message = selection.select('.modal-section.message-text');
+           var items = message.selectAll('.error-container').data(data);
+           var enter = items.enter().append('div').attr('class', 'error-container');
+           enter.append('a').attr('class', 'error-description').attr('href', '#').classed('hide-toggle', true).text(function (d) {
+             return d.msg || _t('save.unknown_error_details');
+           }).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             var error = select(this);
+             var detail = select(this.nextElementSibling);
+             var exp = error.classed('expanded');
+             detail.style('display', exp ? 'none' : 'block');
+             error.classed('expanded', !exp);
+           });
+           var details = enter.append('div').attr('class', 'error-detail-container').style('display', 'none');
+           details.append('ul').attr('class', 'error-detail-list').selectAll('li').data(function (d) {
+             return d.details || [];
+           }).enter().append('li').attr('class', 'error-detail-item').text(function (d) {
+             return d;
+           });
+           items.exit().remove();
+         }

 
 

-           changesetEditor.tags = function(_) {
-               if (!arguments.length) { return _tags; }
-               _tags = _;
-               // Don't reset _fieldsArr here.
-               return changesetEditor;
-           };
+         function showSuccess(changeset) {
+           commit.reset();

 
 

+           var ui = _success.changeset(changeset).location(_location).on('cancel', function () {
+             context.ui().sidebar.hide();
+           });

 
 

-           changesetEditor.changesetID = function(_) {
-               if (!arguments.length) { return _changesetID; }
-               if (_changesetID === _) { return changesetEditor; }
-               _changesetID = _;
-               _fieldsArr = null;
-               return changesetEditor;
-           };
+           context.enter(modeBrowse(context).sidebar(ui));
+         }

 
 

+         function keybindingOn() {
+           select(document).call(keybinding.on('⎋', cancel, true));
+         }

 
 

-           return utilRebind(changesetEditor, dispatch$1, 'on');
-       }
+         function keybindingOff() {
+           select(document).call(keybinding.unbind);
+         } // Reverse geocode current map location so we can display a message on
+         // the success screen like "Thank you for editing around place, region."

 
 

-       function uiSectionChanges(context) {
-           var detected = utilDetect();

 
 

-           var _discardTags = {};
-           _mainFileFetcher.get('discarded')
-               .then(function(d) { _discardTags = d; })
-               .catch(function() { /* ignore */ });
+         function prepareForSuccess() {
+           _success = uiSuccess(context);
+           _location = null;
+           if (!services.geocoder) return;
+           services.geocoder.reverse(context.map().center(), function (err, result) {
+             if (err || !result || !result.address) return;
+             var addr = result.address;
+             var place = addr && (addr.town || addr.city || addr.county) || '';
+             var region = addr && (addr.state || addr.country) || '';
+             var separator = place && region ? _t('success.thank_you_where.separator') : '';
+             _location = _t('success.thank_you_where.format', {
+               place: place,
+               separator: separator,
+               region: region
+             });
+           });
+         }

 
 

-           var section = uiSection('changes-list', context)
-               .title(function() {
-                   var history = context.history();
-                   var summary = history.difference().summary();
-                   return _t('commit.changes', { count: summary.length });
-               })
-               .disclosureContent(renderDisclosureContent);
+         mode.selectedIDs = function () {
+           return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
+         };

 
 

-           function renderDisclosureContent(selection) {
-               var history = context.history();
-               var summary = history.difference().summary();
+         mode.enter = function () {
+           // Show sidebar
+           context.ui().sidebar.expand();

 
 

-               var container = selection.selectAll('.commit-section')
-                   .data([0]);
+           function done() {
+             context.ui().sidebar.show(commit);
+           }

 
 

-               var containerEnter = container.enter()
-                   .append('div')
-                   .attr('class', 'commit-section');
+           keybindingOn();
+           context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+           var osm = context.connection();

 
 

-               containerEnter
-                   .append('ul')
-                   .attr('class', 'changeset-list');
+           if (!osm) {
+             cancel();
+             return;
+           }

 
 

-               container = containerEnter
-                   .merge(container);
+           if (osm.authenticated()) {
+             done();
+           } else {
+             osm.authenticate(function (err) {
+               if (err) {
+                 cancel();
+               } else {
+                 done();
+               }
+             });
+           }
+         };

 
 

+         mode.exit = function () {
+           keybindingOff();
+           context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
+           context.ui().sidebar.hide();
+         };

 
 

-               var items = container.select('ul').selectAll('li')
-                   .data(summary);
+         return mode;
+       }

 
 

-               var itemsEnter = items.enter()
-                   .append('li')
-                   .attr('class', 'change-item');
+       function modeSelectError(context, selectedErrorID, selectedErrorService) {
+         var mode = {
+           id: 'select-error',
+           button: 'browse'
+         };
+         var keybinding = utilKeybinding('select-error');
+         var errorService = services[selectedErrorService];
+         var errorEditor;

 
 

-               itemsEnter
-                   .each(function(d) {
-                       select(this)
-                           .call(svgIcon('#iD-icon-' + d.entity.geometry(d.graph), 'pre-text ' + d.changeType));
-                   });
+         switch (selectedErrorService) {
+           case 'improveOSM':
+             errorEditor = uiImproveOsmEditor(context).on('change', function () {
+               context.map().pan([0, 0]); // trigger a redraw

 
 

-               itemsEnter
-                   .append('span')
-                   .attr('class', 'change-type')
-                   .text(function(d) { return _t('commit.' + d.changeType) + ' '; });
-
-               itemsEnter
-                   .append('strong')
-                   .attr('class', 'entity-type')
-                   .text(function(d) {
-                       var matched = _mainPresetIndex.match(d.entity, d.graph);
-                       return (matched && matched.name()) || utilDisplayType(d.entity.id);
-                   });
+               var error = checkSelectedID();
+               if (!error) return;
+               context.ui().sidebar.show(errorEditor.error(error));
+             });
+             break;

 
 

-               itemsEnter
-                   .append('span')
-                   .attr('class', 'entity-name')
-                   .text(function(d) {
-                       var name = utilDisplayName(d.entity) || '',
-                           string = '';
-                       if (name !== '') {
-                           string += ':';
-                       }
-                       return string += ' ' + name;
-                   });
+           case 'keepRight':
+             errorEditor = uiKeepRightEditor(context).on('change', function () {
+               context.map().pan([0, 0]); // trigger a redraw

 
 

-               itemsEnter
-                   .style('opacity', 0)
-                   .transition()
-                   .style('opacity', 1);
+               var error = checkSelectedID();
+               if (!error) return;
+               context.ui().sidebar.show(errorEditor.error(error));
+             });
+             break;

 
 

-               items = itemsEnter
-                   .merge(items);
+           case 'osmose':
+             errorEditor = uiOsmoseEditor(context).on('change', function () {
+               context.map().pan([0, 0]); // trigger a redraw

 
 

-               items
-                   .on('mouseover', mouseover)
-                   .on('mouseout', mouseout)
-                   .on('click', click);
+               var error = checkSelectedID();
+               if (!error) return;
+               context.ui().sidebar.show(errorEditor.error(error));
+             });
+             break;
+         }

 
 

+         var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];

 
 

-               // Download changeset link
-               var changeset = new osmChangeset().update({ id: undefined });
-               var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+         function checkSelectedID() {
+           if (!errorService) return;
+           var error = errorService.getError(selectedErrorID);

 
 

-               delete changeset.id;  // Export without chnageset_id
+           if (!error) {
+             context.enter(modeBrowse(context));
+           }

 
 

-               var data = JXON.stringify(changeset.osmChangeJXON(changes));
-               var blob = new Blob([data], {type: 'text/xml;charset=utf-8;'});
-               var fileName = 'changes.osc';
+           return error;
+         }

 
 

-               var linkEnter = container.selectAll('.download-changes')
-                   .data([0])
-                   .enter()
-                   .append('a')
-                   .attr('class', 'download-changes');
-
-               if (detected.download) {      // All except IE11 and Edge
-                   linkEnter                 // download the data as a file
-                       .attr('href', window.URL.createObjectURL(blob))
-                       .attr('download', fileName);
-
-               } else {                      // IE11 and Edge
-                   linkEnter                 // open data uri in a new tab
-                       .attr('target', '_blank')
-                       .on('click.download', function() {
-                           navigator.msSaveBlob(blob, fileName);
-                       });
-               }
+         mode.zoomToSelected = function () {
+           if (!errorService) return;
+           var error = errorService.getError(selectedErrorID);

 
 

-               linkEnter
-                   .call(svgIcon('#iD-icon-load', 'inline'))
-                   .append('span')
-                   .text(_t('commit.download_changes'));
+           if (error) {
+             context.map().centerZoomEase(error.loc, 20);
+           }
+         };

 
 

+         mode.enter = function () {
+           var error = checkSelectedID();
+           if (!error) return;
+           behaviors.forEach(context.install);
+           keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+           select(document).call(keybinding);
+           selectError();
+           var sidebar = context.ui().sidebar;
+           sidebar.show(errorEditor.error(error));
+           context.map().on('drawn.select-error', selectError); // class the error as selected, or return to browse mode if the error is gone

 
 

-               function mouseover(d) {
-                   if (d.entity) {
-                       context.surface().selectAll(
-                           utilEntityOrMemberSelector([d.entity.id], context.graph())
-                       ).classed('hover', true);
-                   }
-               }
+           function selectError(d3_event, drawn) {
+             if (!checkSelectedID()) return;
+             var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);

 
 

+             if (selection.empty()) {
+               // Return to browse mode if selected DOM elements have
+               // disappeared because the user moved them out of view..
+               var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;

 
 

-               function mouseout() {
-                   context.surface().selectAll('.hover')
-                       .classed('hover', false);
+               if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+                 context.enter(modeBrowse(context));

                }
                }

+             } else {
+               selection.classed('selected', true);
+               context.selectedErrorID(selectedErrorID);
+             }
+           }

 
 

-
-               function click(change) {
-                   if (change.changeType !== 'deleted') {
-                       var entity = change.entity;
-                       context.map().zoomToEase(entity);
-                       context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph()))
-                           .classed('hover', true);
-                   }
-               }
+           function esc() {
+             if (context.container().select('.combobox').size()) return;
+             context.enter(modeBrowse(context));

            }
            }

+         };

 
 

-           return section;
+         mode.exit = function () {
+           behaviors.forEach(context.uninstall);
+           select(document).call(keybinding.unbind);
+           context.surface().selectAll('.qaItem.selected').classed('selected hover', false);
+           context.map().on('drawn.select-error', null);
+           context.ui().sidebar.hide();
+           context.selectedErrorID(null);
+           context.features().forceVisible([]);
+         };
+
+         return mode;

        }
 
        }
 

-       function uiCommitWarnings(context) {
+       function uiToolOldDrawModes(context) {
+         var tool = {
+           id: 'old_modes',
+           label: _t.html('toolbar.add_feature')
+         };
+         var modes = [modeAddPoint(context, {
+           title: _t.html('modes.add_point.title'),
+           button: 'point',
+           description: _t.html('modes.add_point.description'),
+           preset: _mainPresetIndex.item('point'),
+           key: '1'
+         }), modeAddLine(context, {
+           title: _t.html('modes.add_line.title'),
+           button: 'line',
+           description: _t.html('modes.add_line.description'),
+           preset: _mainPresetIndex.item('line'),
+           key: '2'
+         }), modeAddArea(context, {
+           title: _t.html('modes.add_area.title'),
+           button: 'area',
+           description: _t.html('modes.add_area.description'),
+           preset: _mainPresetIndex.item('area'),
+           key: '3'
+         })];
+
+         function enabled() {
+           return osmEditable();
+         }
+
+         function osmEditable() {
+           return context.editable();
+         }
+
+         modes.forEach(function (mode) {
+           context.keybinding().on(mode.key, function () {
+             if (!enabled()) return;
+
+             if (mode.id === context.mode().id) {
+               context.enter(modeBrowse(context));
+             } else {
+               context.enter(mode);
+             }
+           });
+         });

 
 

-           function commitWarnings(selection) {
-               var issuesBySeverity = context.validator()
-                   .getIssuesBySeverity({ what: 'edited', where: 'all', includeDisabledRules: true });
+         tool.render = function (selection) {
+           var wrap = selection.append('div').attr('class', 'joined').style('display', 'flex');

 
 

-               for (var severity in issuesBySeverity) {
-                   var issues = issuesBySeverity[severity];
-                   var section = severity + '-section';
-                   var issueItem = severity + '-item';
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
+           });

 
 

-                   var container = selection.selectAll('.' + section)
-                       .data(issues.length ? [0] : []);
+           context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
+           context.on('enter.modes', update);
+           update();

 
 

-                   container.exit()
-                       .remove();
+           function update() {
+             var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
+               return d.id;
+             }); // exit

 
 

-                   var containerEnter = container.enter()
-                       .append('div')
-                       .attr('class', 'modal-section ' + section + ' fillL2');
+             buttons.exit().remove(); // enter

 
 

-                   containerEnter
-                       .append('h3')
-                       .text(severity === 'warning' ? _t('commit.warnings') : _t('commit.errors'));
+             var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+               return d.id + ' add-button bar-button';
+             }).on('click.mode-buttons', function (d3_event, d) {
+               if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042

 
 

-                   containerEnter
-                       .append('ul')
-                       .attr('class', 'changeset-list');
+               var currMode = context.mode().id;
+               if (/^draw/.test(currMode)) return;

 
 

-                   container = containerEnter
-                       .merge(container);
+               if (d.id === currMode) {
+                 context.enter(modeBrowse(context));
+               } else {
+                 context.enter(d);
+               }
+             }).call(uiTooltip().placement('bottom').title(function (d) {
+               return d.description;
+             }).keys(function (d) {
+               return [d.key];
+             }).scrollContainer(context.container().select('.top-toolbar')));
+             buttonsEnter.each(function (d) {
+               select(this).call(svgIcon('#iD-icon-' + d.button));
+             });
+             buttonsEnter.append('span').attr('class', 'label').html(function (mode) {
+               return mode.title;
+             }); // if we are adding/removing the buttons, check if toolbar has overflowed

 
 

+             if (buttons.enter().size() || buttons.exit().size()) {
+               context.ui().checkOverflow('.top-toolbar', true);
+             } // update

 
 

-                   var items = container.select('ul').selectAll('li')
-                       .data(issues, function(d) { return d.id; });

 
 

-                   items.exit()
-                       .remove();
+             buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
+               return !enabled();
+             }).classed('active', function (d) {
+               return context.mode() && context.mode().button === d.button;
+             });
+           }
+         };

 
 

-                   var itemsEnter = items.enter()
-                       .append('li')
-                       .attr('class', issueItem);
+         return tool;
+       }

 
 

-                   itemsEnter
-                       .call(svgIcon('#iD-icon-alert', 'pre-text'));
+       function uiToolNotes(context) {
+         var tool = {
+           id: 'notes',
+           label: _t.html('modes.add_note.label')
+         };
+         var mode = modeAddNote(context);

 
 

-                   itemsEnter
-                       .append('strong')
-                       .attr('class', 'issue-message');
+         function enabled() {
+           return notesEnabled() && notesEditable();
+         }

 
 

-                   itemsEnter.filter(function(d) { return d.tooltip; })
-                       .call(uiTooltip()
-                           .title(function(d) { return d.tooltip; })
-                           .placement('top')
-                       );
+         function notesEnabled() {
+           var noteLayer = context.layers().layer('notes');
+           return noteLayer && noteLayer.enabled();
+         }

 
 

-                   items = itemsEnter
-                       .merge(items);
+         function notesEditable() {
+           var mode = context.mode();
+           return context.map().notesEditable() && mode && mode.id !== 'save';
+         }

 
 

-                   items.selectAll('.issue-message')
-                       .text(function(d) {
-                           return d.message(context);
-                       });
+         context.keybinding().on(mode.key, function () {
+           if (!enabled()) return;

 
 

-                   items
-                       .on('mouseover', function(d) {
-                           if (d.entityIds) {
-                               context.surface().selectAll(
-                                   utilEntityOrMemberSelector(
-                                       d.entityIds,
-                                       context.graph()
-                                   )
-                               ).classed('hover', true);
-                           }
-                       })
-                       .on('mouseout', function() {
-                           context.surface().selectAll('.hover')
-                               .classed('hover', false);
-                       })
-                       .on('click', function(d) {
-                           context.validator().focusIssue(d);
-                       });
-               }
+           if (mode.id === context.mode().id) {
+             context.enter(modeBrowse(context));
+           } else {
+             context.enter(mode);

            }
            }

+         });

 
 

+         tool.render = function (selection) {
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
+           });

 
 

-           return commitWarnings;
-       }
-
-       var readOnlyTags = [
-           /^changesets_count$/,
-           /^created_by$/,
-           /^ideditor:/,
-           /^imagery_used$/,
-           /^host$/,
-           /^locale$/,
-           /^warnings:/,
-           /^resolved:/,
-           /^closed:note$/,
-           /^closed:keepright$/,
-           /^closed:improveosm:/,
-           /^closed:osmose:/
-       ];
-
-       // treat most punctuation (except -, _, +, &) as hashtag delimiters - #4398
-       // from https://stackoverflow.com/a/25575009
-       var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
-
-
-       function uiCommit(context) {
-           var dispatch$1 = dispatch('cancel');
-           var _userDetails;
-           var _selection;
-
-           var changesetEditor = uiChangesetEditor(context)
-               .on('change', changeTags);
-           var rawTagEditor = uiSectionRawTagEditor('changeset-tag-editor', context)
-               .on('change', changeTags)
-               .readOnlyTags(readOnlyTags);
-           var commitChanges = uiSectionChanges(context);
-           var commitWarnings = uiCommitWarnings(context);
+           context.map().on('move.notes', debouncedUpdate).on('drawn.notes', debouncedUpdate);
+           context.on('enter.notes', update);
+           update();

 
 

+           function update() {
+             var showNotes = notesEnabled();
+             var data = showNotes ? [mode] : [];
+             var buttons = selection.selectAll('button.add-button').data(data, function (d) {
+               return d.id;
+             }); // exit

 
 

-           function commit(selection) {
-               _selection = selection;
+             buttons.exit().remove(); // enter

 
 

-               // Initialize changeset if one does not exist yet.
-               if (!context.changeset) { initChangeset(); }
+             var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+               return d.id + ' add-button bar-button';
+             }).on('click.notes', function (d3_event, d) {
+               if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042

 
 

-               loadDerivedChangesetTags();
+               var currMode = context.mode().id;
+               if (/^draw/.test(currMode)) return;

 
 

-               selection.call(render);
+               if (d.id === currMode) {
+                 context.enter(modeBrowse(context));
+               } else {
+                 context.enter(d);
+               }
+             }).call(uiTooltip().placement('bottom').title(function (d) {
+               return d.description;
+             }).keys(function (d) {
+               return [d.key];
+             }).scrollContainer(context.container().select('.top-toolbar')));
+             buttonsEnter.each(function (d) {
+               select(this).call(svgIcon(d.icon || '#iD-icon-' + d.button));
+             }); // if we are adding/removing the buttons, check if toolbar has overflowed
+
+             if (buttons.enter().size() || buttons.exit().size()) {
+               context.ui().checkOverflow('.top-toolbar', true);
+             } // update
+
+
+             buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
+               return !enabled();
+             }).classed('active', function (d) {
+               return context.mode() && context.mode().button === d.button;
+             });

            }
            }

+         };

 
 

-           function initChangeset() {
+         tool.uninstall = function () {
+           context.on('enter.editor.notes', null).on('exit.editor.notes', null).on('enter.notes', null);
+           context.map().on('move.notes', null).on('drawn.notes', null);
+         };

 
 

-               // expire stored comment, hashtags, source after cutoff datetime - #3947 #4899
-               var commentDate = +corePreferences('commentDate') || 0;
-               var currDate = Date.now();
-               var cutoff = 2 * 86400 * 1000;   // 2 days
-               if (commentDate > currDate || currDate - commentDate > cutoff) {
-                   corePreferences('comment', null);
-                   corePreferences('hashtags', null);
-                   corePreferences('source', null);
-               }
+         return tool;
+       }

 
 

-               // load in explicitly-set values, if any
-               if (context.defaultChangesetComment()) {
-                   corePreferences('comment', context.defaultChangesetComment());
-                   corePreferences('commentDate', Date.now());
-               }
-               if (context.defaultChangesetSource()) {
-                   corePreferences('source', context.defaultChangesetSource());
-                   corePreferences('commentDate', Date.now());
-               }
-               if (context.defaultChangesetHashtags()) {
-                   corePreferences('hashtags', context.defaultChangesetHashtags());
-                   corePreferences('commentDate', Date.now());
-               }
+       function uiToolSave(context) {
+         var tool = {
+           id: 'save',
+           label: _t.html('save.title')
+         };
+         var button = null;
+         var tooltipBehavior = null;
+         var history = context.history();
+         var key = uiCmd('⌘S');
+         var _numChanges = 0;

 
 

-               var detected = utilDetect();
-               var tags = {
-                   comment: corePreferences('comment') || '',
-                   created_by: context.cleanTagValue('iD ' + context.version),
-                   host: context.cleanTagValue(detected.host),
-                   locale: context.cleanTagValue(_mainLocalizer.localeCode())
-               };
+         function isSaving() {
+           var mode = context.mode();
+           return mode && mode.id === 'save';
+         }

 
 

-               // call findHashtags initially - this will remove stored
-               // hashtags if any hashtags are found in the comment - #4304
-               findHashtags(tags, true);
+         function isDisabled() {
+           return _numChanges === 0 || isSaving();
+         }

 
 

-               var hashtags = corePreferences('hashtags');
-               if (hashtags) {
-                   tags.hashtags = hashtags;
-               }
+         function save(d3_event) {
+           d3_event.preventDefault();

 
 

-               var source = corePreferences('source');
-               if (source) {
-                   tags.source = source;
-               }
-               var photoOverlaysUsed = context.history().photoOverlaysUsed();
-               if (photoOverlaysUsed.length) {
-                   var sources = (tags.source || '').split(';');
+           if (!context.inIntro() && !isSaving() && history.hasChanges()) {
+             context.enter(modeSave(context));
+           }
+         }

 
 

-                   // include this tag for any photo layer
-                   if (sources.indexOf('streetlevel imagery') === -1) {
-                       sources.push('streetlevel imagery');
-                   }
+         function bgColor() {
+           var step;

 
 

-                   // add the photo overlays used during editing as sources
-                   photoOverlaysUsed.forEach(function(photoOverlay) {
-                       if (sources.indexOf(photoOverlay) === -1) {
-                           sources.push(photoOverlay);
-                       }
-                   });
+           if (_numChanges === 0) {
+             return null;
+           } else if (_numChanges <= 50) {
+             step = _numChanges / 50;
+             return d3_interpolateRgb('#fff', '#ff8')(step); // white -> yellow
+           } else {
+             step = Math.min((_numChanges - 50) / 50, 1.0);
+             return d3_interpolateRgb('#ff8', '#f88')(step); // yellow -> red
+           }
+         }

 
 

-                   tags.source = context.cleanTagValue(sources.join(';'));
-               }
+         function updateCount() {
+           var val = history.difference().summary().length;
+           if (val === _numChanges) return;
+           _numChanges = val;

 
 

-               context.changeset = new osmChangeset({ tags: tags });
+           if (tooltipBehavior) {
+             tooltipBehavior.title(_t.html(_numChanges > 0 ? 'save.help' : 'save.no_changes')).keys([key]);

            }
 
            }
 

-           // Calculates read-only metadata tags based on the user's editing session and applies
-           // them to the changeset.
-           function loadDerivedChangesetTags() {
+           if (button) {
+             button.classed('disabled', isDisabled()).style('background', bgColor());
+             button.select('span.count').html(_numChanges);
+           }
+         }

 
 

-               var osm = context.connection();
-               if (!osm) { return; }
+         tool.render = function (selection) {
+           tooltipBehavior = uiTooltip().placement('bottom').title(_t.html('save.no_changes')).keys([key]).scrollContainer(context.container().select('.top-toolbar'));
+           var lastPointerUpType;
+           button = selection.append('button').attr('class', 'save disabled bar-button').on('pointerup', function (d3_event) {
+             lastPointerUpType = d3_event.pointerType;
+           }).on('click', function (d3_event) {
+             save(d3_event);

 
 

-               var tags = Object.assign({}, context.changeset.tags);   // shallow copy
+             if (_numChanges === 0 && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
+               // there are no tooltips for touch interactions so flash feedback instead
+               context.ui().flash.duration(2000).iconName('#iD-icon-save').iconClass('disabled').label(_t.html('save.no_changes'))();
+             }

 
 

-               // assign tags for imagery used
-               var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
-               tags.imagery_used = imageryUsed || 'None';
+             lastPointerUpType = null;
+           }).call(tooltipBehavior);
+           button.call(svgIcon('#iD-icon-save'));
+           button.append('span').attr('class', 'count').attr('aria-hidden', 'true').html('0');
+           updateCount();
+           context.keybinding().on(key, save, true);
+           context.history().on('change.save', updateCount);
+           context.on('enter.save', function () {
+             if (button) {
+               button.classed('disabled', isDisabled());

 
 

-               // assign tags for closed issues and notes
-               var osmClosed = osm.getClosedIDs();
-               var itemType;
-               if (osmClosed.length) {
-                   tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
-               }
-               if (services.keepRight) {
-                   var krClosed = services.keepRight.getClosedIDs();
-                   if (krClosed.length) {
-                       tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
-                   }
-               }
-               if (services.improveOSM) {
-                   var iOsmClosed = services.improveOSM.getClosedCounts();
-                   for (itemType in iOsmClosed) {
-                       tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
-                   }
-               }
-               if (services.osmose) {
-                   var osmoseClosed = services.osmose.getClosedCounts();
-                   for (itemType in osmoseClosed) {
-                       tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
-                   }
+               if (isSaving()) {
+                 button.call(tooltipBehavior.hide);

                }
                }

+             }
+           });
+         };

 
 

-               // remove existing issue counts
-               for (var key in tags) {
-                   if (key.match(/(^warnings:)|(^resolved:)/)) {
-                       delete tags[key];
-                   }
-               }
+         tool.uninstall = function () {
+           context.keybinding().off(key, true);
+           context.history().on('change.save', null);
+           context.on('enter.save', null);
+           button = null;
+           tooltipBehavior = null;
+         };

 
 

-               function addIssueCounts(issues, prefix) {
-                   var issuesByType = utilArrayGroupBy(issues, 'type');
-                   for (var issueType in issuesByType) {
-                       var issuesOfType = issuesByType[issueType];
-                       if (issuesOfType[0].subtype) {
-                           var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
-                           for (var issueSubtype in issuesBySubtype) {
-                               var issuesOfSubtype = issuesBySubtype[issueSubtype];
-                               tags[prefix + ':' + issueType + ':' + issueSubtype] = context.cleanTagValue(issuesOfSubtype.length.toString());
-                           }
-                       } else {
-                           tags[prefix + ':' + issueType] = context.cleanTagValue(issuesOfType.length.toString());
-                       }
-                   }
-               }
+         return tool;
+       }

 
 

-               // add counts of warnings generated by the user's edits
-               var warnings = context.validator()
-                   .getIssuesBySeverity({ what: 'edited', where: 'all', includeIgnored: true, includeDisabledRules: true }).warning;
-               addIssueCounts(warnings, 'warnings');
+       function uiToolSidebarToggle(context) {
+         var tool = {
+           id: 'sidebar_toggle',
+           label: _t.html('toolbar.inspect')
+         };

 
 

-               // add counts of issues resolved by the user's edits
-               var resolvedIssues = context.validator().getResolvedIssues();
-               addIssueCounts(resolvedIssues, 'resolved');
+         tool.render = function (selection) {
+           selection.append('button').attr('class', 'bar-button').on('click', function () {
+             context.ui().sidebar.toggle();
+           }).call(uiTooltip().placement('bottom').title(_t.html('sidebar.tooltip')).keys([_t('sidebar.key')]).scrollContainer(context.container().select('.top-toolbar'))).call(svgIcon('#iD-icon-sidebar-' + (_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')));
+         };

 
 

-               context.changeset = context.changeset.update({ tags: tags });
-           }
+         return tool;
+       }

 
 

-           function render(selection) {
+       function uiToolUndoRedo(context) {
+         var tool = {
+           id: 'undo_redo',
+           label: _t.html('toolbar.undo_redo')
+         };
+         var commands = [{
+           id: 'undo',
+           cmd: uiCmd('⌘Z'),
+           action: function action() {
+             context.undo();
+           },
+           annotation: function annotation() {
+             return context.history().undoAnnotation();
+           },
+           icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')
+         }, {
+           id: 'redo',
+           cmd: uiCmd('⌘⇧Z'),
+           action: function action() {
+             context.redo();
+           },
+           annotation: function annotation() {
+             return context.history().redoAnnotation();
+           },
+           icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'undo' : 'redo')
+         }];

 
 

-               var osm = context.connection();
-               if (!osm) { return; }
+         function editable() {
+           return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true
+           /* ignore min zoom */
+           );
+         }

 
 

-               var header = selection.selectAll('.header')
-                   .data([0]);
+         tool.render = function (selection) {
+           var tooltipBehavior = uiTooltip().placement('bottom').title(function (d) {
+             return d.annotation() ? _t.html(d.id + '.tooltip', {
+               action: d.annotation()
+             }) : _t.html(d.id + '.nothing');
+           }).keys(function (d) {
+             return [d.cmd];
+           }).scrollContainer(context.container().select('.top-toolbar'));
+           var lastPointerUpType;
+           var buttons = selection.selectAll('button').data(commands).enter().append('button').attr('class', function (d) {
+             return 'disabled ' + d.id + '-button bar-button';
+           }).on('pointerup', function (d3_event) {
+             // `pointerup` is always called before `click`
+             lastPointerUpType = d3_event.pointerType;
+           }).on('click', function (d3_event, d) {
+             d3_event.preventDefault();
+             var annotation = d.annotation();
+
+             if (editable() && annotation) {
+               d.action();
+             }

 
 

-               var headerTitle = header.enter()
-                   .append('div')
-                   .attr('class', 'header fillL header-container');
+             if (editable() && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
+               // there are no tooltips for touch interactions so flash feedback instead
+               var text = annotation ? _t(d.id + '.tooltip', {
+                 action: annotation
+               }) : _t(d.id + '.nothing');
+               context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass(annotation ? '' : 'disabled').label(text)();
+             }

 
 

-               headerTitle
-                   .append('div')
-                   .attr('class', 'header-block header-block-outer');
+             lastPointerUpType = null;
+           }).call(tooltipBehavior);
+           buttons.each(function (d) {
+             select(this).call(svgIcon('#' + d.icon));
+           });
+           context.keybinding().on(commands[0].cmd, function (d3_event) {
+             d3_event.preventDefault();
+             if (editable()) commands[0].action();
+           }).on(commands[1].cmd, function (d3_event) {
+             d3_event.preventDefault();
+             if (editable()) commands[1].action();
+           });

 
 

-               headerTitle
-                   .append('div')
-                   .attr('class', 'header-block')
-                   .append('h3')
-                   .text(_t('commit.title'));
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
+           });

 
 

-               headerTitle
-                   .append('div')
-                   .attr('class', 'header-block header-block-outer header-block-close')
-                   .append('button')
-                   .attr('class', 'close')
-                   .on('click', function() {
-                       dispatch$1.call('cancel', this);
-                   })
-                   .call(svgIcon('#iD-icon-close'));
-
-               var body = selection.selectAll('.body')
-                   .data([0]);
-
-               body = body.enter()
-                   .append('div')
-                   .attr('class', 'body')
-                   .merge(body);
+           context.map().on('move.undo_redo', debouncedUpdate).on('drawn.undo_redo', debouncedUpdate);
+           context.history().on('change.undo_redo', function (difference) {
+             if (difference) update();
+           });
+           context.on('enter.undo_redo', update);
+
+           function update() {
+             buttons.classed('disabled', function (d) {
+               return !editable() || !d.annotation();
+             }).each(function () {
+               var selection = select(this);

 
 

+               if (!selection.select('.tooltip.in').empty()) {
+                 selection.call(tooltipBehavior.updateContent);
+               }
+             });
+           }
+         };

 
 

-               // Changeset Section
-               var changesetSection = body.selectAll('.changeset-editor')
-                   .data([0]);
+         tool.uninstall = function () {
+           context.keybinding().off(commands[0].cmd).off(commands[1].cmd);
+           context.map().on('move.undo_redo', null).on('drawn.undo_redo', null);
+           context.history().on('change.undo_redo', null);
+           context.on('enter.undo_redo', null);
+         };

 
 

-               changesetSection = changesetSection.enter()
-                   .append('div')
-                   .attr('class', 'modal-section changeset-editor')
-                   .merge(changesetSection);
+         return tool;
+       }

 
 

-               changesetSection
-                   .call(changesetEditor
-                       .changesetID(context.changeset.id)
-                       .tags(context.changeset.tags)
-                   );
+       function uiTopToolbar(context) {
+         var sidebarToggle = uiToolSidebarToggle(context),
+             modes = uiToolOldDrawModes(context),
+             notes = uiToolNotes(context),
+             undoRedo = uiToolUndoRedo(context),
+             save = uiToolSave(context);
+
+         function notesEnabled() {
+           var noteLayer = context.layers().layer('notes');
+           return noteLayer && noteLayer.enabled();
+         }
+
+         function topToolbar(bar) {
+           bar.on('wheel.topToolbar', function (d3_event) {
+             if (!d3_event.deltaX) {
+               // translate vertical scrolling into horizontal scrolling in case
+               // the user doesn't have an input device that can scroll horizontally
+               bar.node().scrollLeft += d3_event.deltaY;
+             }
+           });

 
 

+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
+           });

 
 

-               // Warnings
-               body.call(commitWarnings);
+           context.layers().on('change.topToolbar', debouncedUpdate);
+           update();

 
 

+           function update() {
+             var tools = [sidebarToggle, 'spacer', modes];
+             tools.push('spacer');

 
 

-               // Upload Explanation
-               var saveSection = body.selectAll('.save-section')
-                   .data([0]);
+             if (notesEnabled()) {
+               tools = tools.concat([notes, 'spacer']);
+             }

 
 

-               saveSection = saveSection.enter()
-                   .append('div')
-                   .attr('class','modal-section save-section fillL')
-                   .merge(saveSection);
+             tools = tools.concat([undoRedo, save]);
+             var toolbarItems = bar.selectAll('.toolbar-item').data(tools, function (d) {
+               return d.id || d;
+             });
+             toolbarItems.exit().each(function (d) {
+               if (d.uninstall) {
+                 d.uninstall();
+               }
+             }).remove();
+             var itemsEnter = toolbarItems.enter().append('div').attr('class', function (d) {
+               var classes = 'toolbar-item ' + (d.id || d).replace('_', '-');
+               if (d.klass) classes += ' ' + d.klass;
+               return classes;
+             });
+             var actionableItems = itemsEnter.filter(function (d) {
+               return d !== 'spacer';
+             });
+             actionableItems.append('div').attr('class', 'item-content').each(function (d) {
+               select(this).call(d.render, bar);
+             });
+             actionableItems.append('div').attr('class', 'item-label').html(function (d) {
+               return d.label;
+             });
+           }
+         }

 
 

-               var prose = saveSection.selectAll('.commit-info')
-                   .data([0]);
+         return topToolbar;
+       }

 
 

-               if (prose.enter().size()) {   // first time, make sure to update user details in prose
-                   _userDetails = null;
-               }
+       var sawVersion = null;
+       var isNewVersion = false;
+       var isNewUser = false;
+       function uiVersion(context) {
+         var currVersion = context.version;
+         var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);

 
 

-               prose = prose.enter()
-                   .append('p')
-                   .attr('class', 'commit-info')
-                   .text(_t('commit.upload_explanation'))
-                   .merge(prose);
+         if (sawVersion === null && matchedVersion !== null) {
+           if (corePreferences('sawVersion')) {
+             isNewUser = false;
+             isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
+           } else {
+             isNewUser = true;
+             isNewVersion = true;
+           }

 
 

-               // always check if this has changed, but only update prose.html()
-               // if needed, because it can trigger a style recalculation
-               osm.userDetails(function(err, user) {
-                   if (err) { return; }
+           corePreferences('sawVersion', currVersion);
+           sawVersion = currVersion;
+         }

 
 

-                   if (_userDetails === user) { return; }  // no change
-                   _userDetails = user;
+         return function (selection) {
+           selection.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD').html(currVersion); // only show new version indicator to users that have used iD before

 
 

-                   var userLink = select(document.createElement('div'));
+           if (isNewVersion && !isNewUser) {
+             selection.append('a').attr('class', 'badge').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/release/CHANGELOG.md#whats-new').call(svgIcon('#maki-gift-11')).call(uiTooltip().title(_t.html('version.whats_new', {
+               version: currVersion
+             })).placement('top').scrollContainer(context.container().select('.main-footer-wrap')));
+           }
+         };
+       }

 
 

-                   if (user.image_url) {
-                       userLink
-                           .append('img')
-                           .attr('src', user.image_url)
-                           .attr('class', 'icon pre-text user-icon');
-                   }
+       function uiZoom(context) {
+         var zooms = [{
+           id: 'zoom-in',
+           icon: 'iD-icon-plus',
+           title: _t.html('zoom.in'),
+           action: zoomIn,
+           disabled: function disabled() {
+             return !context.map().canZoomIn();
+           },
+           disabledTitle: _t.html('zoom.disabled.in'),
+           key: '+'
+         }, {
+           id: 'zoom-out',
+           icon: 'iD-icon-minus',
+           title: _t.html('zoom.out'),
+           action: zoomOut,
+           disabled: function disabled() {
+             return !context.map().canZoomOut();
+           },
+           disabledTitle: _t.html('zoom.disabled.out'),
+           key: '-'
+         }];

 
 

-                   userLink
-                       .append('a')
-                       .attr('class', 'user-info')
-                       .text(user.display_name)
-                       .attr('href', osm.userURL(user.display_name))
-                       .attr('target', '_blank');
+         function zoomIn(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomIn();
+         }

 
 

-                   prose
-                       .html(_t('commit.upload_explanation_with_user', { user: userLink.html() }));
-               });
+         function zoomOut(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomOut();
+         }

 
 

+         function zoomInFurther(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomInFurther();
+         }

 
 

-               // Request Review
-               var requestReview = saveSection.selectAll('.request-review')
-                   .data([0]);
+         function zoomOutFurther(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomOutFurther();
+         }

 
 

-               // Enter
-               var requestReviewEnter = requestReview.enter()
-                   .append('div')
-                   .attr('class', 'request-review');
+         return function (selection) {
+           var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function (d) {
+             if (d.disabled()) {
+               return d.disabledTitle;
+             }

 
 

-               var requestReviewDomId = utilUniqueDomId('commit-input-request-review');
+             return d.title;
+           }).keys(function (d) {
+             return [d.key];
+           });
+           var lastPointerUpType;
+           var buttons = selection.selectAll('button').data(zooms).enter().append('button').attr('class', function (d) {
+             return d.id;
+           }).on('pointerup.editor', function (d3_event) {
+             lastPointerUpType = d3_event.pointerType;
+           }).on('click.editor', function (d3_event, d) {
+             if (!d.disabled()) {
+               d.action(d3_event);
+             } else if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+               context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass('disabled').label(d.disabledTitle)();
+             }

 
 

-               var labelEnter = requestReviewEnter
-                   .append('label')
-                   .attr('for', requestReviewDomId);
+             lastPointerUpType = null;
+           }).call(tooltipBehavior);
+           buttons.each(function (d) {
+             select(this).call(svgIcon('#' + d.icon, 'light'));
+           });
+           utilKeybinding.plusKeys.forEach(function (key) {
+             context.keybinding().on([key], zoomIn);
+             context.keybinding().on([uiCmd('⌥' + key)], zoomInFurther);
+           });
+           utilKeybinding.minusKeys.forEach(function (key) {
+             context.keybinding().on([key], zoomOut);
+             context.keybinding().on([uiCmd('⌥' + key)], zoomOutFurther);
+           });

 
 

-               labelEnter
-                   .append('input')
-                   .attr('type', 'checkbox')
-                   .attr('id', requestReviewDomId);
+           function updateButtonStates() {
+             buttons.classed('disabled', function (d) {
+               return d.disabled();
+             }).each(function () {
+               var selection = select(this);

 
 

-               labelEnter
-                   .append('span')
-                   .text(_t('commit.request_review'));
+               if (!selection.select('.tooltip.in').empty()) {
+                 selection.call(tooltipBehavior.updateContent);
+               }
+             });
+           }

 
 

-               // Update
-               requestReview = requestReview
-                   .merge(requestReviewEnter);
+           updateButtonStates();
+           context.map().on('move.uiZoom', updateButtonStates);
+         };
+       }

 
 

-               var requestReviewInput = requestReview.selectAll('input')
-                   .property('checked', isReviewRequested(context.changeset.tags))
-                   .on('change', toggleRequestReview);
+       function uiZoomToSelection(context) {
+         function isDisabled() {
+           var mode = context.mode();
+           return !mode || !mode.zoomToSelected;
+         }

 
 

+         var _lastPointerUpType;

 
 

-               // Buttons
-               var buttonSection = saveSection.selectAll('.buttons')
-                   .data([0]);
+         function pointerup(d3_event) {
+           _lastPointerUpType = d3_event.pointerType;
+         }

 
 

-               // enter
-               var buttonEnter = buttonSection.enter()
-                   .append('div')
-                   .attr('class', 'buttons fillL');
+         function click(d3_event) {
+           d3_event.preventDefault();

 
 

-               buttonEnter
-                   .append('button')
-                   .attr('class', 'secondary-action button cancel-button')
-                   .append('span')
-                   .attr('class', 'label')
-                   .text(_t('commit.cancel'));
+           if (isDisabled()) {
+             if (_lastPointerUpType === 'touch' || _lastPointerUpType === 'pen') {
+               context.ui().flash.duration(2000).iconName('#iD-icon-framed-dot').iconClass('disabled').label(_t.html('inspector.zoom_to.no_selection'))();
+             }
+           } else {
+             var mode = context.mode();

 
 

-               var uploadButton = buttonEnter
-                   .append('button')
-                   .attr('class', 'action button save-button');
+             if (mode && mode.zoomToSelected) {
+               mode.zoomToSelected();
+             }
+           }

 
 

-               uploadButton.append('span')
-                   .attr('class', 'label')
-                   .text(_t('commit.save'));
+           _lastPointerUpType = null;
+         }

 
 

-               var uploadBlockerTooltipText = getUploadBlockerMessage();
+         return function (selection) {
+           var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function () {
+             if (isDisabled()) {
+               return _t.html('inspector.zoom_to.no_selection');
+             }

 
 

-               // update
-               buttonSection = buttonSection
-                   .merge(buttonEnter);
+             return _t.html('inspector.zoom_to.title');
+           }).keys([_t('inspector.zoom_to.key')]);
+           var button = selection.append('button').on('pointerup', pointerup).on('click', click).call(svgIcon('#iD-icon-framed-dot', 'light')).call(tooltipBehavior);

 
 

-               buttonSection.selectAll('.cancel-button')
-                   .on('click.cancel', function() {
-                       dispatch$1.call('cancel', this);
-                   });
+           function setEnabledState() {
+             button.classed('disabled', isDisabled());

 
 

-               buttonSection.selectAll('.save-button')
-                   .classed('disabled', uploadBlockerTooltipText !== null)
-                   .on('click.save', function() {
-                       if (!select(this).classed('disabled')) {
-                           this.blur();    // avoid keeping focus on the button - #4641
-                           context.uploader().save(context.changeset);
-                       }
-                   });
+             if (!button.select('.tooltip.in').empty()) {
+               button.call(tooltipBehavior.updateContent);
+             }
+           }

 
 

-               // remove any existing tooltip
-               uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
+           context.on('enter.uiZoomToSelection', setEnabledState);
+           setEnabledState();
+         };
+       }

 
 

-               if (uploadBlockerTooltipText) {
-                   buttonSection.selectAll('.save-button')
-                       .call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
-               }
+       function uiPane(id, context) {
+         var _key;

 
 

-               // Raw Tag Editor
-               var tagSection = body.selectAll('.tag-section.raw-tag-editor')
-                   .data([0]);
+         var _label = '';
+         var _description = '';
+         var _iconName = '';

 
 

-               tagSection = tagSection.enter()
-                   .append('div')
-                   .attr('class', 'modal-section tag-section raw-tag-editor')
-                   .merge(tagSection);
+         var _sections; // array of uiSection objects

 
 

-               tagSection
-                   .call(rawTagEditor
-                       .tags(Object.assign({}, context.changeset.tags))   // shallow copy
-                       .render
-                   );

 
 

-               var changesSection = body.selectAll('.commit-changes-section')
-                   .data([0]);
+         var _paneSelection = select(null);

 
 

-               changesSection = changesSection.enter()
-                   .append('div')
-                   .attr('class', 'modal-section commit-changes-section')
-                   .merge(changesSection);
+         var _paneTooltip;

 
 

-               // Change summary
-               changesSection.call(commitChanges.render);
+         var pane = {
+           id: id
+         };

 
 

+         pane.label = function (val) {
+           if (!arguments.length) return _label;
+           _label = val;
+           return pane;
+         };

 
 

-               function toggleRequestReview() {
-                   var rr = requestReviewInput.property('checked');
-                   updateChangeset({ review_requested: (rr ? 'yes' : undefined) });
+         pane.key = function (val) {
+           if (!arguments.length) return _key;
+           _key = val;
+           return pane;
+         };

 
 

-                   tagSection
-                       .call(rawTagEditor
-                           .tags(Object.assign({}, context.changeset.tags))   // shallow copy
-                           .render
-                       );
-               }
-           }
+         pane.description = function (val) {
+           if (!arguments.length) return _description;
+           _description = val;
+           return pane;
+         };

 
 

+         pane.iconName = function (val) {
+           if (!arguments.length) return _iconName;
+           _iconName = val;
+           return pane;
+         };

 
 

-           function getUploadBlockerMessage() {
-               var errors = context.validator()
-                   .getIssuesBySeverity({ what: 'edited', where: 'all' }).error;
+         pane.sections = function (val) {
+           if (!arguments.length) return _sections;
+           _sections = val;
+           return pane;
+         };

 
 

-               if (errors.length) {
-                   return _t('commit.outstanding_errors_message', { count: errors.length });
+         pane.selection = function () {
+           return _paneSelection;
+         };

 
 

-               } else {
-                   var hasChangesetComment = context.changeset && context.changeset.tags.comment && context.changeset.tags.comment.trim().length;
-                   if (!hasChangesetComment) {
-                       return _t('commit.comment_needed_message');
-                   }
-               }
-               return null;
-           }
+         function hidePane() {
+           context.ui().togglePanes();
+         }

 
 

+         pane.togglePane = function (d3_event) {
+           if (d3_event) d3_event.preventDefault();

 
 

-           function changeTags(_, changed, onInput) {
-               if (changed.hasOwnProperty('comment')) {
-                   if (changed.comment === undefined) {
-                       changed.comment = '';
-                   }
-                   if (!onInput) {
-                       corePreferences('comment', changed.comment);
-                       corePreferences('commentDate', Date.now());
-                   }
-               }
-               if (changed.hasOwnProperty('source')) {
-                   if (changed.source === undefined) {
-                       corePreferences('source', null);
-                   } else if (!onInput) {
-                       corePreferences('source', changed.source);
-                       corePreferences('commentDate', Date.now());
-                   }
-               }
-               // no need to update `prefs` for `hashtags` here since it's done in `updateChangeset`
+           _paneTooltip.hide();

 
 

-               updateChangeset(changed, onInput);
+           context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
+         };

 
 

-               if (_selection) {
-                   _selection.call(render);
-               }
+         pane.renderToggleButton = function (selection) {
+           if (!_paneTooltip) {
+             _paneTooltip = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_description).keys([_key]);

            }
 
            }
 

+           selection.append('button').on('click', pane.togglePane).call(svgIcon('#' + _iconName, 'light')).call(_paneTooltip);
+         };

 
 

-           function findHashtags(tags, commentOnly) {
-               var detectedHashtags = commentHashtags();
-
-               if (detectedHashtags.length) {
-                   // always remove stored hashtags if there are hashtags in the comment - #4304
-                   corePreferences('hashtags', null);
-               }
-               if (!detectedHashtags.length || !commentOnly) {
-                   detectedHashtags = detectedHashtags.concat(hashtagHashtags());
-               }
+         pane.renderContent = function (selection) {
+           // override to fully customize content
+           if (_sections) {
+             _sections.forEach(function (section) {
+               selection.call(section.render);
+             });
+           }
+         };

 
 

-               var allLowerCase = new Set();
-               return detectedHashtags.filter(function(hashtag) {
-                   // Compare tags as lowercase strings, but keep original case tags
-                   var lowerCase = hashtag.toLowerCase();
-                   if (!allLowerCase.has(lowerCase)) {
-                       allLowerCase.add(lowerCase);
-                       return true;
-                   }
-                   return false;
-               });
+         pane.renderPane = function (selection) {
+           _paneSelection = selection.append('div').attr('class', 'fillL map-pane hide ' + id + '-pane').attr('pane', id);

 
 

-               // Extract hashtags from `comment`
-               function commentHashtags() {
-                   var matches = (tags.comment || '')
-                       .replace(/http\S*/g, '')  // drop anything that looks like a URL - #4289
-                       .match(hashtagRegex);
+           var heading = _paneSelection.append('div').attr('class', 'pane-heading');

 
 

-                   return matches || [];
-               }
+           heading.append('h2').html(_label);
+           heading.append('button').on('click', hidePane).call(svgIcon('#iD-icon-close'));

 
 

-               // Extract and clean hashtags from `hashtags`
-               function hashtagHashtags() {
-                   var matches = (tags.hashtags || '')
-                       .split(/[,;\s]+/)
-                       .map(function (s) {
-                           if (s[0] !== '#') { s = '#' + s; }    // prepend '#'
-                           var matched = s.match(hashtagRegex);
-                           return matched && matched[0];
-                       }).filter(Boolean);                       // exclude falsy
+           _paneSelection.append('div').attr('class', 'pane-content').call(pane.renderContent);

 
 

-                   return matches || [];
-               }
+           if (_key) {
+             context.keybinding().on(_key, pane.togglePane);

            }
            }

+         };

 
 

+         return pane;
+       }

 
 

-           function isReviewRequested(tags) {
-               var rr = tags.review_requested;
-               if (rr === undefined) { return false; }
-               rr = rr.trim().toLowerCase();
-               return !(rr === '' || rr === 'no');
-           }
-
+       function uiSectionBackgroundDisplayOptions(context) {
+         var section = uiSection('background-display-options', context).label(_t.html('background.display_options')).disclosureContent(renderDisclosureContent);

 
 

-           function updateChangeset(changed, onInput) {
-               var tags = Object.assign({}, context.changeset.tags);   // shallow copy
+         var _detected = utilDetect();

 
 

-               Object.keys(changed).forEach(function(k) {
-                   var v = changed[k];
-                   k = context.cleanTagKey(k);
-                   if (readOnlyTags.indexOf(k) !== -1) { return; }
+         var _storedOpacity = corePreferences('background-opacity');

 
 

-                   if (k !== '' && v !== undefined) {
-                       if (onInput) {
-                           tags[k] = v;
-                       } else {
-                           tags[k] = context.cleanTagValue(v);
-                       }
-                   } else {
-                       delete tags[k];
-                   }
-               });
+         var _minVal = 0;

 
 

-               if (!onInput) {
-                   // when changing the comment, override hashtags with any found in comment.
-                   var commentOnly = changed.hasOwnProperty('comment') && (changed.comment !== '');
-                   var arr = findHashtags(tags, commentOnly);
-                   if (arr.length) {
-                       tags.hashtags = context.cleanTagValue(arr.join(';'));
-                       corePreferences('hashtags', tags.hashtags);
-                   } else {
-                       delete tags.hashtags;
-                       corePreferences('hashtags', null);
-                   }
-               }
+         var _maxVal = _detected.cssfilters ? 3 : 1;

 
 

-               // always update userdetails, just in case user reauthenticates as someone else
-               if (_userDetails && _userDetails.changesets_count !== undefined) {
-                   var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1;  // #4283
-                   tags.changesets_count = String(changesetsCount);
+         var _sliders = _detected.cssfilters ? ['brightness', 'contrast', 'saturation', 'sharpness'] : ['brightness'];

 
 

-                   // first 100 edits - new user
-                   if (changesetsCount <= 100) {
-                       var s;
-                       s = corePreferences('walkthrough_completed');
-                       if (s) {
-                           tags['ideditor:walkthrough_completed'] = s;
-                       }
+         var _options = {
+           brightness: _storedOpacity !== null ? +_storedOpacity : 1,
+           contrast: 1,
+           saturation: 1,
+           sharpness: 1
+         };

 
 

-                       s = corePreferences('walkthrough_progress');
-                       if (s) {
-                           tags['ideditor:walkthrough_progress'] = s;
-                       }
+         function clamp(x, min, max) {
+           return Math.max(min, Math.min(x, max));
+         }

 
 

-                       s = corePreferences('walkthrough_started');
-                       if (s) {
-                           tags['ideditor:walkthrough_started'] = s;
-                       }
-                   }
-               } else {
-                   delete tags.changesets_count;
-               }
+         function updateValue(d, val) {
+           val = clamp(val, _minVal, _maxVal);
+           _options[d] = val;
+           context.background()[d](val);

 
 

-               if (!fastDeepEqual(context.changeset.tags, tags)) {
-                   context.changeset = context.changeset.update({ tags: tags });
-               }
+           if (d === 'brightness') {
+             corePreferences('background-opacity', val);

            }
 
            }
 

+           section.reRender();
+         }

 
 

-           commit.reset = function() {
-               context.changeset = null;
-           };
-
-
-           return utilRebind(commit, dispatch$1, 'on');
-       }
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.display-options-container').data([0]);
+           var containerEnter = container.enter().append('div').attr('class', 'display-options-container controls-list'); // add slider controls

 
 

-       var RADIUS = 6378137;
-       var FLATTENING = 1/298.257223563;
-       var POLAR_RADIUS$1 = 6356752.3142;
+           var slidersEnter = containerEnter.selectAll('.display-control').data(_sliders).enter().append('div').attr('class', function (d) {
+             return 'display-control display-control-' + d;
+           });
+           slidersEnter.append('h5').html(function (d) {
+             return _t.html('background.' + d);
+           }).append('span').attr('class', function (d) {
+             return 'display-option-value display-option-value-' + d;
+           });
+           var sildersControlEnter = slidersEnter.append('div').attr('class', 'control-wrap');
+           sildersControlEnter.append('input').attr('class', function (d) {
+             return 'display-option-input display-option-input-' + d;
+           }).attr('type', 'range').attr('min', _minVal).attr('max', _maxVal).attr('step', '0.05').on('input', function (d3_event, d) {
+             var val = select(this).property('value');
+
+             if (!val && d3_event && d3_event.target) {
+               val = d3_event.target.value;
+             }

 
 

-       var wgs84 = {
-               RADIUS: RADIUS,
-               FLATTENING: FLATTENING,
-               POLAR_RADIUS: POLAR_RADIUS$1
-       };
+             updateValue(d, val);
+           });
+           sildersControlEnter.append('button').attr('title', _t('background.reset')).attr('class', function (d) {
+             return 'display-option-reset display-option-reset-' + d;
+           }).on('click', function (d3_event, d) {
+             if (d3_event.button !== 0) return;
+             updateValue(d, 1);
+           }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo'))); // reset all button
+
+           containerEnter.append('a').attr('class', 'display-option-resetlink').attr('href', '#').html(_t.html('background.reset_all')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+
+             for (var i = 0; i < _sliders.length; i++) {
+               updateValue(_sliders[i], 1);
+             }
+           }); // update

 
 

-       var geometry_1 = geometry;
-       var ring = ringArea;
+           container = containerEnter.merge(container);
+           container.selectAll('.display-option-input').property('value', function (d) {
+             return _options[d];
+           });
+           container.selectAll('.display-option-value').html(function (d) {
+             return Math.floor(_options[d] * 100) + '%';
+           });
+           container.selectAll('.display-option-reset').classed('disabled', function (d) {
+             return _options[d] === 1;
+           }); // first time only, set brightness if needed

 
 

-       function geometry(_) {
-           var area = 0, i;
-           switch (_.type) {
-               case 'Polygon':
-                   return polygonArea(_.coordinates);
-               case 'MultiPolygon':
-                   for (i = 0; i < _.coordinates.length; i++) {
-                       area += polygonArea(_.coordinates[i]);
-                   }
-                   return area;
-               case 'Point':
-               case 'MultiPoint':
-               case 'LineString':
-               case 'MultiLineString':
-                   return 0;
-               case 'GeometryCollection':
-                   for (i = 0; i < _.geometries.length; i++) {
-                       area += geometry(_.geometries[i]);
-                   }
-                   return area;
+           if (containerEnter.size() && _options.brightness !== 1) {
+             context.background().brightness(_options.brightness);

            }
            }

-       }
+         }

 
 

-       function polygonArea(coords) {
-           var area = 0;
-           if (coords && coords.length > 0) {
-               area += Math.abs(ringArea(coords[0]));
-               for (var i = 1; i < coords.length; i++) {
-                   area -= Math.abs(ringArea(coords[i]));
-               }
-           }
-           return area;
+         return section;

        }
 
        }
 

-       /**
-        * Calculate the approximate area of the polygon were it projected onto
-        *     the earth.  Note that this area will be positive if ring is oriented
-        *     clockwise, otherwise it will be negative.
-        *
-        * Reference:
-        * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
-        *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
-        *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
-        *
-        * Returns:
-        * {float} The approximate signed geodesic area of the polygon in square
-        *     meters.
-        */
+       function uiSettingsCustomBackground() {
+         var dispatch = dispatch$8('change');
+
+         function render(selection) {
+           // keep separate copies of original and current settings
+           var _origSettings = {
+             template: corePreferences('background-custom-template')
+           };
+           var _currSettings = {
+             template: corePreferences('background-custom-template')
+           };
+           var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
+           var modal = uiConfirm(selection).okButton();
+           modal.classed('settings-modal settings-custom-background', true);
+           modal.select('.modal-section.header').append('h3').html(_t.html('settings.custom_background.header'));
+           var textSection = modal.select('.modal-section.message-text');
+           var instructions = "".concat(_t.html('settings.custom_background.instructions.info'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.wms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.proj'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.wkid'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.dimensions'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.bbox'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.tms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.xyz'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.flipped_y'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.switch'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.quadtile'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.scale_factor'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.example'), "\n") + "`".concat(example, "`");
+           textSection.append('div').attr('class', 'instructions-template').html(marked_1(instructions));
+           textSection.append('textarea').attr('class', 'field-template').attr('placeholder', _t('settings.custom_background.template.placeholder')).call(utilNoAuto).property('value', _currSettings.template); // insert a cancel button
+
+           var buttonSection = modal.select('.modal-section.buttons');
+           buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
+           buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
+           buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);
+
+           function isSaveDisabled() {
+             return null;
+           } // restore the original template

 
 

-       function ringArea(coords) {
-           var p1, p2, p3, lowerIndex, middleIndex, upperIndex, i,
-           area = 0,
-           coordsLength = coords.length;
-
-           if (coordsLength > 2) {
-               for (i = 0; i < coordsLength; i++) {
-                   if (i === coordsLength - 2) {// i = N-2
-                       lowerIndex = coordsLength - 2;
-                       middleIndex = coordsLength -1;
-                       upperIndex = 0;
-                   } else if (i === coordsLength - 1) {// i = N-1
-                       lowerIndex = coordsLength - 1;
-                       middleIndex = 0;
-                       upperIndex = 1;
-                   } else { // i = 0 to N-3
-                       lowerIndex = i;
-                       middleIndex = i+1;
-                       upperIndex = i+2;
-                   }
-                   p1 = coords[lowerIndex];
-                   p2 = coords[middleIndex];
-                   p3 = coords[upperIndex];
-                   area += ( rad(p3[0]) - rad(p1[0]) ) * Math.sin( rad(p2[1]));
-               }

 
 

-               area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
-           }
+           function clickCancel() {
+             textSection.select('.field-template').property('value', _origSettings.template);
+             corePreferences('background-custom-template', _origSettings.template);
+             this.blur();
+             modal.close();
+           } // accept the current template

 
 

-           return area;
-       }

 
 

-       function rad(_) {
-           return _ * Math.PI / 180;
+           function clickSave() {
+             _currSettings.template = textSection.select('.field-template').property('value');
+             corePreferences('background-custom-template', _currSettings.template);
+             this.blur();
+             modal.close();
+             dispatch.call('change', this, _currSettings);
+           }
+         }
+
+         return utilRebind(render, dispatch, 'on');

        }
 
        }
 

-       var geojsonArea = {
-               geometry: geometry_1,
-               ring: ring
-       };
+       function uiSectionBackgroundList(context) {
+         var _backgroundList = select(null);

 
 

-       function toRadians(angleInDegrees) {
-         return (angleInDegrees * Math.PI) / 180;
-       }
+         var _customSource = context.background().findSource('custom');

 
 

-       function toDegrees(angleInRadians) {
-         return (angleInRadians * 180) / Math.PI;
-       }
+         var _settingsCustomBackground = uiSettingsCustomBackground().on('change', customChanged);

 
 

-       function offset(c1, distance, bearing) {
-         var lat1 = toRadians(c1[1]);
-         var lon1 = toRadians(c1[0]);
-         var dByR = distance / 6378137; // distance divided by 6378137 (radius of the earth) wgs84
-         var lat = Math.asin(
-           Math.sin(lat1) * Math.cos(dByR) +
-             Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing)
-         );
-         var lon =
-           lon1 +
-           Math.atan2(
-             Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1),
-             Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat)
-           );
-         return [toDegrees(lon), toDegrees(lat)];
-       }
+         var section = uiSection('background-list', context).label(_t.html('background.backgrounds')).disclosureContent(renderDisclosureContent);

 
 

-       function validateCenter(center) {
-         var validCenterLengths = [2, 3];
-         if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
-           throw new Error("ERROR! Center has to be an array of length two or three");
+         function previousBackgroundID() {
+           return corePreferences('background-last-used-toggle');

          }
          }

-         var lng = center[0];
-         var lat = center[1];
-         if (typeof lng !== "number" || typeof lat !== "number") {
-           throw new Error(
-             ("ERROR! Longitude and Latitude has to be numbers but where " + (typeof lng) + " and " + (typeof lat))
-           );
+
+         function renderDisclosureContent(selection) {
+           // the background list
+           var container = selection.selectAll('.layer-background-list').data([0]);
+           _backgroundList = container.enter().append('ul').attr('class', 'layer-list layer-background-list').attr('dir', 'auto').merge(container); // add minimap toggle below list
+
+           var bgExtrasListEnter = selection.selectAll('.bg-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list bg-extras-list');
+           var minimapLabelEnter = bgExtrasListEnter.append('li').attr('class', 'minimap-toggle-item').append('label').call(uiTooltip().title(_t.html('background.minimap.tooltip')).keys([_t('background.minimap.key')]).placement('top'));
+           minimapLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+             d3_event.preventDefault();
+             uiMapInMap.toggle();
+           });
+           minimapLabelEnter.append('span').html(_t.html('background.minimap.description'));
+           var panelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'background-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.background.key'))]).placement('top'));
+           panelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+             d3_event.preventDefault();
+             context.ui().info.toggle('background');
+           });
+           panelLabelEnter.append('span').html(_t.html('background.panel.description'));
+           var locPanelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'location-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.location_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.location.key'))]).placement('top'));
+           locPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+             d3_event.preventDefault();
+             context.ui().info.toggle('location');
+           });
+           locPanelLabelEnter.append('span').html(_t.html('background.location_panel.description')); // "Info / Report a Problem" link
+
+           selection.selectAll('.imagery-faq').data([0]).enter().append('div').attr('class', 'imagery-faq').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/develop/FAQ.md#how-can-i-report-an-issue-with-background-imagery').append('span').html(_t.html('background.imagery_problem_faq'));
+
+           _backgroundList.call(drawListItems, 'radio', function (d3_event, d) {
+             chooseBackground(d);
+           }, function (d) {
+             return !d.isHidden() && !d.overlay;
+           });

          }
          }

-         if (lng > 180 || lng < -180) {
-           throw new Error(
-             ("ERROR! Longitude has to be between -180 and 180 but was " + lng)
-           );
+
+         function setTooltips(selection) {
+           selection.each(function (d, i, nodes) {
+             var item = select(this).select('label');
+             var span = item.select('span');
+             var placement = i < nodes.length / 2 ? 'bottom' : 'top';
+             var description = d.description();
+             var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
+             item.call(uiTooltip().destroyAny);
+
+             if (d.id === previousBackgroundID()) {
+               item.call(uiTooltip().placement(placement).title('<div>' + _t.html('background.switch') + '</div>').keys([uiCmd('⌘' + _t('background.key'))]));
+             } else if (description || isOverflowing) {
+               item.call(uiTooltip().placement(placement).title(description || d.label()));
+             }
+           });

          }
 
          }
 

-         if (lat > 90 || lat < -90) {
-           throw new Error(
-             ("ERROR! Latitude has to be between -90 and 90 but was " + lat)
-           );
+         function drawListItems(layerList, type, change, filter) {
+           var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter).sort(function (a, b) {
+             return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
+           });
+           var layerLinks = layerList.selectAll('li') // We have to be a bit inefficient about reordering the list since
+           // arrow key navigation of radio values likes to work in the order
+           // they were added, not the display document order.
+           .data(sources, function (d, i) {
+             return d.id + '---' + i;
+           });
+           layerLinks.exit().remove();
+           var enter = layerLinks.enter().append('li').classed('layer-custom', function (d) {
+             return d.id === 'custom';
+           }).classed('best', function (d) {
+             return d.best();
+           });
+           var label = enter.append('label');
+           label.append('input').attr('type', type).attr('name', 'background-layer').attr('value', function (d) {
+             return d.id;
+           }).on('change', change);
+           label.append('span').html(function (d) {
+             return d.label();
+           });
+           enter.filter(function (d) {
+             return d.id === 'custom';
+           }).append('button').attr('class', 'layer-browse').call(uiTooltip().title(_t.html('settings.custom_background.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             editCustom();
+           }).call(svgIcon('#iD-icon-more'));
+           enter.filter(function (d) {
+             return d.best();
+           }).append('div').attr('class', 'best').call(uiTooltip().title(_t.html('background.best_imagery')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).append('span').html('&#9733;');
+           layerList.call(updateLayerSelections);

          }
          }

-       }

 
 

-       function validateRadius(radius) {
-         if (typeof radius !== "number") {
-           throw new Error(
-             ("ERROR! Radius has to be a positive number but was: " + (typeof radius))
-           );
+         function updateLayerSelections(selection) {
+           function active(d) {
+             return context.background().showsLayer(d);
+           }
+
+           selection.selectAll('li').classed('active', active).classed('switch', function (d) {
+             return d.id === previousBackgroundID();
+           }).call(setTooltips).selectAll('input').property('checked', active);

          }
 
          }
 

-         if (radius <= 0) {
-           throw new Error(
-             ("ERROR! Radius has to be a positive number but was: " + radius)
-           );
+         function chooseBackground(d) {
+           if (d.id === 'custom' && !d.template()) {
+             return editCustom();
+           }
+
+           var previousBackground = context.background().baseLayerSource();
+           corePreferences('background-last-used-toggle', previousBackground.id);
+           corePreferences('background-last-used', d.id);
+           context.background().baseLayerSource(d);

          }
          }

-       }

 
 

-       function validateNumberOfSegments(numberOfSegments) {
-         if (typeof numberOfSegments !== "number" && numberOfSegments !== undefined) {
-           throw new Error(
-             ("ERROR! Number of segments has to be a number but was: " + (typeof numberOfSegments))
-           );
+         function customChanged(d) {
+           if (d && d.template) {
+             _customSource.template(d.template);
+
+             chooseBackground(_customSource);
+           } else {
+             _customSource.template('');
+
+             chooseBackground(context.background().findSource('none'));
+           }

          }
 
          }
 

-         if (numberOfSegments < 3) {
-           throw new Error(
-             ("ERROR! Number of segments has to be at least 3 but was: " + numberOfSegments)
-           );
+         function editCustom() {
+           context.container().call(_settingsCustomBackground);

          }
          }

-       }
-
-       function validateInput(ref) {
-         var center = ref.center;
-         var radius = ref.radius;
-         var numberOfSegments = ref.numberOfSegments;

 
 

-         validateCenter(center);
-         validateRadius(radius);
-         validateNumberOfSegments(numberOfSegments);
+         context.background().on('change.background_list', function () {
+           _backgroundList.call(updateLayerSelections);
+         });
+         context.map().on('move.background_list', debounce(function () {
+           // layers in-view may have changed due to map move
+           window.requestIdleCallback(section.reRender);
+         }, 1000));
+         return section;

        }
 
        }
 

-       var circleToPolygon = function circleToPolygon(center, radius, numberOfSegments) {
-         var n = numberOfSegments ? numberOfSegments : 32;
+       function uiSectionBackgroundOffset(context) {
+         var section = uiSection('background-offset', context).label(_t.html('background.fix_misalignment')).disclosureContent(renderDisclosureContent).expandedByDefault(false);

 
 

-         // validateInput() throws error on invalid input and do nothing on valid input
-         validateInput({ center: center, radius: radius, numberOfSegments: numberOfSegments });
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

 
 

-         var coordinates = [];
-         for (var i = 0; i < n; ++i) {
-           coordinates.push(offset(center, radius, (2 * Math.PI * -i) / n));
+         var _directions = [['top', [0, -0.5]], ['left', [-0.5, 0]], ['right', [0.5, 0]], ['bottom', [0, 0.5]]];
+
+         function updateValue() {
+           var meters = geoOffsetToMeters(context.background().offset());
+           var x = +meters[0].toFixed(2);
+           var y = +meters[1].toFixed(2);
+           context.container().selectAll('.nudge-inner-rect').select('input').classed('error', false).property('value', x + ', ' + y);
+           context.container().selectAll('.nudge-reset').classed('disabled', function () {
+             return x === 0 && y === 0;
+           });

          }
          }

-         coordinates.push(coordinates[0]);

 
 

-         return {
-           type: "Polygon",
-           coordinates: [coordinates]
-         };
-       };
+         function resetOffset() {
+           context.background().offset([0, 0]);
+           updateValue();
+         }

 
 

-       var geojsonPrecision = createCommonjsModule(function (module) {
-       (function() {
+         function nudge(d) {
+           context.background().nudge(d, context.map().zoom());
+           updateValue();
+         }

 
 

-         function parse(t, coordinatePrecision, extrasPrecision) {
+         function inputOffset() {
+           var input = select(this);
+           var d = input.node().value;
+           if (d === '') return resetOffset();
+           d = d.replace(/;/g, ',').split(',').map(function (n) {
+             // if n is NaN, it will always get mapped to false.
+             return !isNaN(n) && n;
+           });

 
 

-           function point(p) {
-             return p.map(function(e, index) {
-               if (index < 2) {
-                   return 1 * e.toFixed(coordinatePrecision);
-               } else {
-                   return 1 * e.toFixed(extrasPrecision);
-               }
-             });
+           if (d.length !== 2 || !d[0] || !d[1]) {
+             input.classed('error', true);
+             return;

            }
 
            }
 

-           function multi(l) {
-             return l.map(point);
+           context.background().offset(geoMetersToOffset(d));
+           updateValue();
+         }
+
+         function dragOffset(d3_event) {
+           if (d3_event.button !== 0) return;
+           var origin = [d3_event.clientX, d3_event.clientY];
+           var pointerId = d3_event.pointerId || 'mouse';
+           context.container().append('div').attr('class', 'nudge-surface');
+           select(window).on(_pointerPrefix + 'move.drag-bg-offset', pointermove).on(_pointerPrefix + 'up.drag-bg-offset', pointerup);
+
+           if (_pointerPrefix === 'pointer') {
+             select(window).on('pointercancel.drag-bg-offset', pointerup);

            }
 
            }
 

-           function poly(p) {
-             return p.map(multi);
+           function pointermove(d3_event) {
+             if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+             var latest = [d3_event.clientX, d3_event.clientY];
+             var d = [-(origin[0] - latest[0]) / 4, -(origin[1] - latest[1]) / 4];
+             origin = latest;
+             nudge(d);

            }
 
            }
 

-           function multiPoly(m) {
-             return m.map(poly);
+           function pointerup(d3_event) {
+             if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+             if (d3_event.button !== 0) return;
+             context.container().selectAll('.nudge-surface').remove();
+             select(window).on('.drag-bg-offset', null);

            }
            }

+         }

 
 

-           function geometry(obj) {
-             if (!obj) {
-               return {};
-             }
-             
-             switch (obj.type) {
-               case "Point":
-                 obj.coordinates = point(obj.coordinates);
-                 return obj;
-               case "LineString":
-               case "MultiPoint":
-                 obj.coordinates = multi(obj.coordinates);
-                 return obj;
-               case "Polygon":
-               case "MultiLineString":
-                 obj.coordinates = poly(obj.coordinates);
-                 return obj;
-               case "MultiPolygon":
-                 obj.coordinates = multiPoly(obj.coordinates);
-                 return obj;
-               case "GeometryCollection":
-                 obj.geometries = obj.geometries.map(geometry);
-                 return obj;
-               default :
-                 return {};
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.nudge-container').data([0]);
+           var containerEnter = container.enter().append('div').attr('class', 'nudge-container');
+           containerEnter.append('div').attr('class', 'nudge-instructions').html(_t.html('background.offset'));
+           var nudgeWrapEnter = containerEnter.append('div').attr('class', 'nudge-controls-wrap');
+           var nudgeEnter = nudgeWrapEnter.append('div').attr('class', 'nudge-outer-rect').on(_pointerPrefix + 'down', dragOffset);
+           nudgeEnter.append('div').attr('class', 'nudge-inner-rect').append('input').attr('type', 'text').on('change', inputOffset);
+           nudgeWrapEnter.append('div').selectAll('button').data(_directions).enter().append('button').attr('class', function (d) {
+             return d[0] + ' nudge';
+           }).on('click', function (d3_event, d) {
+             nudge(d[1]);
+           });
+           nudgeWrapEnter.append('button').attr('title', _t('background.reset')).attr('class', 'nudge-reset disabled').on('click', function (d3_event) {
+             d3_event.preventDefault();
+             resetOffset();
+           }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
+           updateValue();
+         }
+
+         context.background().on('change.backgroundOffset-update', updateValue);
+         return section;
+       }
+
+       function uiSectionOverlayList(context) {
+         var section = uiSection('overlay-list', context).label(_t.html('background.overlays')).disclosureContent(renderDisclosureContent);
+
+         var _overlayList = select(null);
+
+         function setTooltips(selection) {
+           selection.each(function (d, i, nodes) {
+             var item = select(this).select('label');
+             var span = item.select('span');
+             var placement = i < nodes.length / 2 ? 'bottom' : 'top';
+             var description = d.description();
+             var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
+             item.call(uiTooltip().destroyAny);
+
+             if (description || isOverflowing) {
+               item.call(uiTooltip().placement(placement).title(description || d.name()));

              }
              }

-           }
+           });
+         }

 
 

-           function feature(obj) {
-             obj.geometry = geometry(obj.geometry);
-             return obj
+         function updateLayerSelections(selection) {
+           function active(d) {
+             return context.background().showsLayer(d);

            }
 
            }
 

-           function featureCollection(f) {
-             f.features = f.features.map(feature);
-             return f;
-           }
+           selection.selectAll('li').classed('active', active).call(setTooltips).selectAll('input').property('checked', active);
+         }

 
 

-           function geometryCollection(g) {
-             g.geometries = g.geometries.map(geometry);
-             return g;
-           }
+         function chooseOverlay(d3_event, d) {
+           d3_event.preventDefault();
+           context.background().toggleOverlayLayer(d);

 
 

-           if (!t) {
-             return t;
-           }
+           _overlayList.call(updateLayerSelections);

 
 

-           switch (t.type) {
-             case "Feature":
-               return feature(t);
-             case "GeometryCollection" :
-               return geometryCollection(t);
-             case "FeatureCollection" :
-               return featureCollection(t);
-             case "Point":
-             case "LineString":
-             case "Polygon":
-             case "MultiPoint":
-             case "MultiPolygon":
-             case "MultiLineString":
-               return geometry(t);
-             default :
-               return t;
+           document.activeElement.blur();
+         }
+
+         function drawListItems(layerList, type, change, filter) {
+           var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter);
+           var layerLinks = layerList.selectAll('li').data(sources, function (d) {
+             return d.name();
+           });
+           layerLinks.exit().remove();
+           var enter = layerLinks.enter().append('li');
+           var label = enter.append('label');
+           label.append('input').attr('type', type).attr('name', 'layers').on('change', change);
+           label.append('span').html(function (d) {
+             return d.label();
+           });
+           layerList.selectAll('li').sort(sortSources);
+           layerList.call(updateLayerSelections);
+
+           function sortSources(a, b) {
+             return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;

            }
            }

-             

          }
 
          }
 

-         module.exports = parse;
-         module.exports.parse = parse;
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.layer-overlay-list').data([0]);
+           _overlayList = container.enter().append('ul').attr('class', 'layer-list layer-overlay-list').attr('dir', 'auto').merge(container);

 
 

-       }());
-       });
+           _overlayList.call(drawListItems, 'checkbox', chooseOverlay, function (d) {
+             return !d.isHidden() && d.overlay;
+           });
+         }

 
 

-       /* Polyfill service v3.13.0
-        * For detailed credits and licence information see http://github.com/financial-times/polyfill-service
-        *
-        * - Array.prototype.fill, License: CC0 */
+         context.map().on('move.overlay_list', debounce(function () {
+           // layers in-view may have changed due to map move
+           window.requestIdleCallback(section.reRender);
+         }, 1000));
+         return section;
+       }

 
 

-       if (!('fill' in Array.prototype)) {
-         Object.defineProperty(Array.prototype, 'fill', {
-           configurable: true,
-           value: function fill (value) {
-             if (this === undefined || this === null) {
-               throw new TypeError(this + ' is not an object')
-             }
+       function uiPaneBackground(context) {
+         var backgroundPane = uiPane('background', context).key(_t('background.key')).label(_t.html('background.title')).description(_t.html('background.description')).iconName('iD-icon-layers').sections([uiSectionBackgroundList(context), uiSectionOverlayList(context), uiSectionBackgroundDisplayOptions(context), uiSectionBackgroundOffset(context)]);
+         return backgroundPane;
+       }

 
 

-             var arrayLike = Object(this);
+       function uiPaneHelp(context) {
+         var docKeys = [['help', ['welcome', 'open_data_h', 'open_data', 'before_start_h', 'before_start', 'open_source_h', 'open_source', 'open_source_help']], ['overview', ['navigation_h', 'navigation_drag', 'navigation_zoom', 'features_h', 'features', 'nodes_ways']], ['editing', ['select_h', 'select_left_click', 'select_right_click', 'select_space', 'multiselect_h', 'multiselect', 'multiselect_shift_click', 'multiselect_lasso', 'undo_redo_h', 'undo_redo', 'save_h', 'save', 'save_validation', 'upload_h', 'upload', 'backups_h', 'backups', 'keyboard_h', 'keyboard']], ['feature_editor', ['intro', 'definitions', 'type_h', 'type', 'type_picker', 'fields_h', 'fields_all_fields', 'fields_example', 'fields_add_field', 'tags_h', 'tags_all_tags', 'tags_resources']], ['points', ['intro', 'add_point_h', 'add_point', 'add_point_finish', 'move_point_h', 'move_point', 'delete_point_h', 'delete_point', 'delete_point_command']], ['lines', ['intro', 'add_line_h', 'add_line', 'add_line_draw', 'add_line_continue', 'add_line_finish', 'modify_line_h', 'modify_line_dragnode', 'modify_line_addnode', 'connect_line_h', 'connect_line', 'connect_line_display', 'connect_line_drag', 'connect_line_tag', 'disconnect_line_h', 'disconnect_line_command', 'move_line_h', 'move_line_command', 'move_line_connected', 'delete_line_h', 'delete_line', 'delete_line_command']], ['areas', ['intro', 'point_or_area_h', 'point_or_area', 'add_area_h', 'add_area_command', 'add_area_draw', 'add_area_continue', 'add_area_finish', 'square_area_h', 'square_area_command', 'modify_area_h', 'modify_area_dragnode', 'modify_area_addnode', 'delete_area_h', 'delete_area', 'delete_area_command']], ['relations', ['intro', 'edit_relation_h', 'edit_relation', 'edit_relation_add', 'edit_relation_delete', 'maintain_relation_h', 'maintain_relation', 'relation_types_h', 'multipolygon_h', 'multipolygon', 'multipolygon_create', 'multipolygon_merge', 'turn_restriction_h', 'turn_restriction', 'turn_restriction_field', 'turn_restriction_editing', 'route_h', 'route', 'route_add', 'boundary_h', 'boundary', 'boundary_add']], ['operations', ['intro', 'intro_2', 'straighten', 'orthogonalize', 'circularize', 'move', 'rotate', 'reflect', 'continue', 'reverse', 'disconnect', 'split', 'extract', 'merge', 'delete', 'downgrade', 'copy_paste']], ['notes', ['intro', 'add_note_h', 'add_note', 'place_note', 'move_note', 'update_note_h', 'update_note', 'save_note_h', 'save_note']], ['imagery', ['intro', 'sources_h', 'choosing', 'sources', 'offsets_h', 'offset', 'offset_change']], ['streetlevel', ['intro', 'using_h', 'using', 'photos', 'viewer']], ['gps', ['intro', 'survey', 'using_h', 'using', 'tracing', 'upload']], ['qa', ['intro', 'tools_h', 'tools', 'issues_h', 'issues']]];
+         var headings = {
+           'help.help.open_data_h': 3,
+           'help.help.before_start_h': 3,
+           'help.help.open_source_h': 3,
+           'help.overview.navigation_h': 3,
+           'help.overview.features_h': 3,
+           'help.editing.select_h': 3,
+           'help.editing.multiselect_h': 3,
+           'help.editing.undo_redo_h': 3,
+           'help.editing.save_h': 3,
+           'help.editing.upload_h': 3,
+           'help.editing.backups_h': 3,
+           'help.editing.keyboard_h': 3,
+           'help.feature_editor.type_h': 3,
+           'help.feature_editor.fields_h': 3,
+           'help.feature_editor.tags_h': 3,
+           'help.points.add_point_h': 3,
+           'help.points.move_point_h': 3,
+           'help.points.delete_point_h': 3,
+           'help.lines.add_line_h': 3,
+           'help.lines.modify_line_h': 3,
+           'help.lines.connect_line_h': 3,
+           'help.lines.disconnect_line_h': 3,
+           'help.lines.move_line_h': 3,
+           'help.lines.delete_line_h': 3,
+           'help.areas.point_or_area_h': 3,
+           'help.areas.add_area_h': 3,
+           'help.areas.square_area_h': 3,
+           'help.areas.modify_area_h': 3,
+           'help.areas.delete_area_h': 3,
+           'help.relations.edit_relation_h': 3,
+           'help.relations.maintain_relation_h': 3,
+           'help.relations.relation_types_h': 2,
+           'help.relations.multipolygon_h': 3,
+           'help.relations.turn_restriction_h': 3,
+           'help.relations.route_h': 3,
+           'help.relations.boundary_h': 3,
+           'help.notes.add_note_h': 3,
+           'help.notes.update_note_h': 3,
+           'help.notes.save_note_h': 3,
+           'help.imagery.sources_h': 3,
+           'help.imagery.offsets_h': 3,
+           'help.streetlevel.using_h': 3,
+           'help.gps.using_h': 3,
+           'help.qa.tools_h': 3,
+           'help.qa.issues_h': 3
+         }; // For each section, squash all the texts into a single markdown document
+
+         var docs = docKeys.map(function (key) {
+           var helpkey = 'help.' + key[0];
+           var helpPaneReplacements = {
+             version: context.version
+           };
+           var text = key[1].reduce(function (all, part) {
+             var subkey = helpkey + '.' + part;
+             var depth = headings[subkey]; // is this subkey a heading?
+
+             var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
+
+             return all + hhh + helpHtml(subkey, helpPaneReplacements) + '\n\n';
+           }, '');
+           return {
+             title: _t.html(helpkey + '.title'),
+             content: marked_1(text.trim()) // use keyboard key styling for shortcuts
+             .replace(/<code>/g, '<kbd>').replace(/<\/code>/g, '<\/kbd>')
+           };
+         });
+         var helpPane = uiPane('help', context).key(_t('help.key')).label(_t.html('help.title')).description(_t.html('help.title')).iconName('iD-icon-help');
+
+         helpPane.renderContent = function (content) {
+           function clickHelp(d, i) {
+             var rtl = _mainLocalizer.textDirection() === 'rtl';
+             content.property('scrollTop', 0);
+             helpPane.selection().select('.pane-heading h2').html(d.title);
+             body.html(d.content);
+             body.selectAll('a').attr('target', '_blank');
+             menuItems.classed('selected', function (m) {
+               return m.title === d.title;
+             });
+             nav.html('');

 
 

-             var length = Math.max(Math.min(arrayLike.length, 9007199254740991), 0) || 0;
+             if (rtl) {
+               nav.call(drawNext).call(drawPrevious);
+             } else {
+               nav.call(drawPrevious).call(drawNext);
+             }

 
 

-             var relativeStart = 1 in arguments ? parseInt(Number(arguments[1]), 10) || 0 : 0;
+             function drawNext(selection) {
+               if (i < docs.length - 1) {
+                 var nextLink = selection.append('a').attr('href', '#').attr('class', 'next').on('click', function (d3_event) {
+                   d3_event.preventDefault();
+                   clickHelp(docs[i + 1], i + 1);
+                 });
+                 nextLink.append('span').html(docs[i + 1].title).call(svgIcon(rtl ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
+               }
+             }

 
 

-             relativeStart = relativeStart < 0 ? Math.max(length + relativeStart, 0) : Math.min(relativeStart, length);
+             function drawPrevious(selection) {
+               if (i > 0) {
+                 var prevLink = selection.append('a').attr('href', '#').attr('class', 'previous').on('click', function (d3_event) {
+                   d3_event.preventDefault();
+                   clickHelp(docs[i - 1], i - 1);
+                 });
+                 prevLink.call(svgIcon(rtl ? '#iD-icon-forward' : '#iD-icon-backward', 'inline')).append('span').html(docs[i - 1].title);
+               }
+             }
+           }

 
 

-             var relativeEnd = 2 in arguments && arguments[2] !== undefined ? parseInt(Number(arguments[2]), 10) || 0 : length;
+           function clickWalkthrough(d3_event) {
+             d3_event.preventDefault();
+             if (context.inIntro()) return;
+             context.container().call(uiIntro(context));
+             context.ui().togglePanes();
+           }

 
 

-             relativeEnd = relativeEnd < 0 ? Math.max(length + arguments[2], 0) : Math.min(relativeEnd, length);
+           function clickShortcuts(d3_event) {
+             d3_event.preventDefault();
+             context.container().call(context.ui().shortcuts, true);
+           }

 
 

-             while (relativeStart < relativeEnd) {
-               arrayLike[relativeStart] = value;
+           var toc = content.append('ul').attr('class', 'toc');
+           var menuItems = toc.selectAll('li').data(docs).enter().append('li').append('a').attr('href', '#').html(function (d) {
+             return d.title;
+           }).on('click', function (d3_event, d) {
+             d3_event.preventDefault();
+             clickHelp(d, docs.indexOf(d));
+           });
+           var shortcuts = toc.append('li').attr('class', 'shortcuts').call(uiTooltip().title(_t.html('shortcuts.tooltip')).keys(['?']).placement('top')).append('a').attr('href', '#').on('click', clickShortcuts);
+           shortcuts.append('div').html(_t.html('shortcuts.title'));
+           var walkthrough = toc.append('li').attr('class', 'walkthrough').append('a').attr('href', '#').on('click', clickWalkthrough);
+           walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+           walkthrough.append('div').html(_t.html('splash.walkthrough'));
+           var helpContent = content.append('div').attr('class', 'left-content');
+           var body = helpContent.append('div').attr('class', 'body');
+           var nav = helpContent.append('div').attr('class', 'nav');
+           clickHelp(docs[0], 0);
+         };

 
 

-               ++relativeStart;
-             }
+         return helpPane;
+       }

 
 

-             return arrayLike
-           },
-           writable: true
+       function uiSectionValidationIssues(id, severity, context) {
+         var _issues = [];
+         var section = uiSection(id, context).label(function () {
+           if (!_issues) return '';
+           var issueCountText = _issues.length > 1000 ? '1000+' : String(_issues.length);
+           return _t('inspector.title_count', {
+             title: _t.html('issues.' + severity + 's.list_title'),
+             count: issueCountText
+           });
+         }).disclosureContent(renderDisclosureContent).shouldDisplay(function () {
+           return _issues && _issues.length;

          });
          });

-       }

 
 

-       /**
-        * Polyfill for IE support
-        */
-       Number.isFinite = Number.isFinite || function (value) {
-         return typeof value === 'number' && isFinite(value)
-       };
+         function getOptions() {
+           return {
+             what: corePreferences('validate-what') || 'edited',
+             where: corePreferences('validate-where') || 'all'
+           };
+         } // get and cache the issues to display, unordered

 
 

-       Number.isInteger = Number.isInteger || function (val) {
-         return typeof val === 'number' &&
-         isFinite(val) &&
-         Math.floor(val) === val
-       };

 
 

-       Number.parseFloat = Number.parseFloat || parseFloat;
+         function reloadIssues() {
+           _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
+         }

 
 

-       Number.isNaN = Number.isNaN || function (value) {
-         return value !== value // eslint-disable-line
-       };
+         function renderDisclosureContent(selection) {
+           var center = context.map().center();
+           var graph = context.graph(); // sort issues by distance away from the center of the map

 
 

-       /**
-        * Polyfill for IE support
-        */
-       Math.trunc = Math.trunc || function (x) {
-         return x < 0 ? Math.ceil(x) : Math.floor(x)
-       };
+           var issues = _issues.map(function withDistance(issue) {
+             var extent = issue.extent(graph);
+             var dist = extent ? geoSphericalDistance(center, extent.center()) : 0;
+             return Object.assign(issue, {
+               dist: dist
+             });
+           }).sort(function byDistance(a, b) {
+             return a.dist - b.dist;
+           }); // cut off at 1000

 
 

-       var NumberUtil = function NumberUtil () {};

 
 

-       NumberUtil.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       NumberUtil.prototype.getClass = function getClass () {
-         return NumberUtil
-       };
-       NumberUtil.prototype.equalsWithTolerance = function equalsWithTolerance (x1, x2, tolerance) {
-         return Math.abs(x1 - x2) <= tolerance
-       };
+           issues = issues.slice(0, 1000); //renderIgnoredIssuesReset(_warningsSelection);

 
 

-       var IllegalArgumentException = (function (Error) {
-               function IllegalArgumentException (message) {
-                       Error.call(this, message);
-                       this.name = 'IllegalArgumentException';
-                       this.message = message;
-                       this.stack = (new Error()).stack;
-               }
-
-               if ( Error ) { IllegalArgumentException.__proto__ = Error; }
-               IllegalArgumentException.prototype = Object.create( Error && Error.prototype );
-               IllegalArgumentException.prototype.constructor = IllegalArgumentException;
-
-               return IllegalArgumentException;
-       }(Error));
-
-       var Double = function Double () {};
-
-       var staticAccessors$1 = { MAX_VALUE: { configurable: true } };
-
-       Double.isNaN = function isNaN (n) { return Number.isNaN(n) };
-       Double.doubleToLongBits = function doubleToLongBits (n) { return n };
-       Double.longBitsToDouble = function longBitsToDouble (n) { return n };
-       Double.isInfinite = function isInfinite (n) { return !Number.isFinite(n) };
-       staticAccessors$1.MAX_VALUE.get = function () { return Number.MAX_VALUE };
-
-       Object.defineProperties( Double, staticAccessors$1 );
-
-       var Comparable = function Comparable () {};
-
-       var Clonable = function Clonable () {};
-
-       var Comparator = function Comparator () {};
-
-       function Serializable () {}
-
-       // import Assert from '../util/Assert'
-
-       var Coordinate = function Coordinate () {
-         this.x = null;
-         this.y = null;
-         this.z = null;
-         if (arguments.length === 0) {
-           this.x = 0.0;
-           this.y = 0.0;
-           this.z = Coordinate.NULL_ORDINATE;
-         } else if (arguments.length === 1) {
-           var c = arguments[0];
-           this.x = c.x;
-           this.y = c.y;
-           this.z = c.z;
-         } else if (arguments.length === 2) {
-           this.x = arguments[0];
-           this.y = arguments[1];
-           this.z = Coordinate.NULL_ORDINATE;
-         } else if (arguments.length === 3) {
-           this.x = arguments[0];
-           this.y = arguments[1];
-           this.z = arguments[2];
+           selection.call(drawIssuesList, issues);

          }
          }

-       };

 
 

-       var staticAccessors = { DimensionalComparator: { configurable: true },serialVersionUID: { configurable: true },NULL_ORDINATE: { configurable: true },X: { configurable: true },Y: { configurable: true },Z: { configurable: true } };
-       Coordinate.prototype.setOrdinate = function setOrdinate (ordinateIndex, value) {
-         switch (ordinateIndex) {
-           case Coordinate.X:
-             this.x = value;
-             break
-           case Coordinate.Y:
-             this.y = value;
-             break
-           case Coordinate.Z:
-             this.z = value;
-             break
-           default:
-             throw new IllegalArgumentException('Invalid ordinate index: ' + ordinateIndex)
-         }
-       };
-       Coordinate.prototype.equals2D = function equals2D () {
-         if (arguments.length === 1) {
-           var other = arguments[0];
-           if (this.x !== other.x) {
-             return false
-           }
-           if (this.y !== other.y) {
-             return false
-           }
-           return true
-         } else if (arguments.length === 2) {
-           var c = arguments[0];
-           var tolerance = arguments[1];
-           if (!NumberUtil.equalsWithTolerance(this.x, c.x, tolerance)) {
-             return false
-           }
-           if (!NumberUtil.equalsWithTolerance(this.y, c.y, tolerance)) {
-             return false
+         function drawIssuesList(selection, issues) {
+           var list = selection.selectAll('.issues-list').data([0]);
+           list = list.enter().append('ul').attr('class', 'layer-list issues-list ' + severity + 's-list').merge(list);
+           var items = list.selectAll('li').data(issues, function (d) {
+             return d.key;
+           }); // Exit
+
+           items.exit().remove(); // Enter
+
+           var itemsEnter = items.enter().append('li').attr('class', function (d) {
+             return 'issue severity-' + d.severity;
+           });
+           var labelsEnter = itemsEnter.append('button').attr('class', 'issue-label').on('click', function (d3_event, d) {
+             context.validator().focusIssue(d);
+           }).on('mouseover', function (d3_event, d) {
+             utilHighlightEntities(d.entityIds, true, context);
+           }).on('mouseout', function (d3_event, d) {
+             utilHighlightEntities(d.entityIds, false, context);
+           });
+           var textEnter = labelsEnter.append('span').attr('class', 'issue-text');
+           textEnter.append('span').attr('class', 'issue-icon').each(function (d) {
+             var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
+             select(this).call(svgIcon(iconName));
+           });
+           textEnter.append('span').attr('class', 'issue-message');
+           /*
+           labelsEnter
+               .append('span')
+               .attr('class', 'issue-autofix')
+               .each(function(d) {
+                   if (!d.autoFix) return;
+                    d3_select(this)
+                       .append('button')
+                       .attr('title', t('issues.fix_one.title'))
+                       .datum(d.autoFix)  // set button datum to the autofix
+                       .attr('class', 'autofix action')
+                       .on('click', function(d3_event, d) {
+                           d3_event.preventDefault();
+                           d3_event.stopPropagation();
+                            var issuesEntityIDs = d.issue.entityIds;
+                           utilHighlightEntities(issuesEntityIDs.concat(d.entityIds), false, context);
+                            context.perform.apply(context, d.autoArgs);
+                           context.validator().validate();
+                       })
+                       .call(svgIcon('#iD-icon-wrench'));
+               });
+           */
+           // Update
+
+           items = items.merge(itemsEnter).order();
+           items.selectAll('.issue-message').html(function (d) {
+             return d.message(context);
+           });
+           /*
+           // autofix
+           var canAutoFix = issues.filter(function(issue) { return issue.autoFix; });
+            var autoFixAll = selection.selectAll('.autofix-all')
+               .data(canAutoFix.length ? [0] : []);
+            // exit
+           autoFixAll.exit()
+               .remove();
+            // enter
+           var autoFixAllEnter = autoFixAll.enter()
+               .insert('div', '.issues-list')
+               .attr('class', 'autofix-all');
+            var linkEnter = autoFixAllEnter
+               .append('a')
+               .attr('class', 'autofix-all-link')
+               .attr('href', '#');
+            linkEnter
+               .append('span')
+               .attr('class', 'autofix-all-link-text')
+               .html(t.html('issues.fix_all.title'));
+            linkEnter
+               .append('span')
+               .attr('class', 'autofix-all-link-icon')
+               .call(svgIcon('#iD-icon-wrench'));
+            if (severity === 'warning') {
+               renderIgnoredIssuesReset(selection);

            }
            }

-           return true
-         }
-       };
-       Coordinate.prototype.getOrdinate = function getOrdinate (ordinateIndex) {
-         switch (ordinateIndex) {
-           case Coordinate.X:
-             return this.x
-           case Coordinate.Y:
-             return this.y
-           case Coordinate.Z:
-             return this.z
-         }
-         throw new IllegalArgumentException('Invalid ordinate index: ' + ordinateIndex)
-       };
-       Coordinate.prototype.equals3D = function equals3D (other) {
-         return this.x === other.x &&
-                this.y === other.y &&
-                ((this.z === other.z || Double.isNaN(this.z)) &&
-                Double.isNaN(other.z))
-       };
-       Coordinate.prototype.equals = function equals (other) {
-         if (!(other instanceof Coordinate)) {
-           return false
+            // update
+           autoFixAll = autoFixAll
+               .merge(autoFixAllEnter);
+            autoFixAll.selectAll('.autofix-all-link')
+               .on('click', function() {
+                   context.pauseChangeDispatch();
+                   context.perform(actionNoop());
+                   canAutoFix.forEach(function(issue) {
+                       var args = issue.autoFix.autoArgs.slice();  // copy
+                       if (typeof args[args.length - 1] !== 'function') {
+                           args.pop();
+                       }
+                       args.push(t('issues.fix_all.annotation'));
+                       context.replace.apply(context, args);
+                   });
+                   context.resumeChangeDispatch();
+                   context.validator().validate();
+               });
+           */

          }
          }

-         return this.equals2D(other)
-       };
-       Coordinate.prototype.equalInZ = function equalInZ (c, tolerance) {
-         return NumberUtil.equalsWithTolerance(this.z, c.z, tolerance)
-       };
-       Coordinate.prototype.compareTo = function compareTo (o) {
-         var other = o;
-         if (this.x < other.x) { return -1 }
-         if (this.x > other.x) { return 1 }
-         if (this.y < other.y) { return -1 }
-         if (this.y > other.y) { return 1 }
-         return 0
-       };
-       Coordinate.prototype.clone = function clone () {
-         // try {
-         // var coord = null
-         // return coord
-         // } catch (e) {
-         // if (e instanceof CloneNotSupportedException) {
-         //   Assert.shouldNeverReachHere("this shouldn't happen because this class is Cloneable")
-         //   return null
-         // } else throw e
-         // } finally {}
-       };
-       Coordinate.prototype.copy = function copy () {
-         return new Coordinate(this)
-       };
-       Coordinate.prototype.toString = function toString () {
-         return '(' + this.x + ', ' + this.y + ', ' + this.z + ')'
-       };
-       Coordinate.prototype.distance3D = function distance3D (c) {
-         var dx = this.x - c.x;
-         var dy = this.y - c.y;
-         var dz = this.z - c.z;
-         return Math.sqrt(dx * dx + dy * dy + dz * dz)
-       };
-       Coordinate.prototype.distance = function distance (c) {
-         var dx = this.x - c.x;
-         var dy = this.y - c.y;
-         return Math.sqrt(dx * dx + dy * dy)
-       };
-       Coordinate.prototype.hashCode = function hashCode () {
-         var result = 17;
-         result = 37 * result + Coordinate.hashCode(this.x);
-         result = 37 * result + Coordinate.hashCode(this.y);
-         return result
-       };
-       Coordinate.prototype.setCoordinate = function setCoordinate (other) {
-         this.x = other.x;
-         this.y = other.y;
-         this.z = other.z;
-       };
-       Coordinate.prototype.interfaces_ = function interfaces_ () {
-         return [Comparable, Clonable, Serializable]
-       };
-       Coordinate.prototype.getClass = function getClass () {
-         return Coordinate
-       };
-       Coordinate.hashCode = function hashCode () {
-         if (arguments.length === 1) {
-           var x = arguments[0];
-           var f = Double.doubleToLongBits(x);
-           return Math.trunc((f ^ f) >>> 32)
+
+         context.validator().on('validated.uiSectionValidationIssues' + id, function () {
+           window.requestIdleCallback(function () {
+             reloadIssues();
+             section.reRender();
+           });
+         });
+         context.map().on('move.uiSectionValidationIssues' + id, debounce(function () {
+           window.requestIdleCallback(function () {
+             if (getOptions().where === 'visible') {
+               // must refetch issues if they are viewport-dependent
+               reloadIssues();
+             } // always reload list to re-sort-by-distance
+
+
+             section.reRender();
+           });
+         }, 1000));
+         return section;
+       }
+
+       function uiSectionValidationOptions(context) {
+         var section = uiSection('issues-options', context).content(renderContent);
+
+         function renderContent(selection) {
+           var container = selection.selectAll('.issues-options-container').data([0]);
+           container = container.enter().append('div').attr('class', 'issues-options-container').merge(container);
+           var data = [{
+             key: 'what',
+             values: ['edited', 'all']
+           }, {
+             key: 'where',
+             values: ['visible', 'all']
+           }];
+           var options = container.selectAll('.issues-option').data(data, function (d) {
+             return d.key;
+           });
+           var optionsEnter = options.enter().append('div').attr('class', function (d) {
+             return 'issues-option issues-option-' + d.key;
+           });
+           optionsEnter.append('div').attr('class', 'issues-option-title').html(function (d) {
+             return _t.html('issues.options.' + d.key + '.title');
+           });
+           var valuesEnter = optionsEnter.selectAll('label').data(function (d) {
+             return d.values.map(function (val) {
+               return {
+                 value: val,
+                 key: d.key
+               };
+             });
+           }).enter().append('label');
+           valuesEnter.append('input').attr('type', 'radio').attr('name', function (d) {
+             return 'issues-option-' + d.key;
+           }).attr('value', function (d) {
+             return d.value;
+           }).property('checked', function (d) {
+             return getOptions()[d.key] === d.value;
+           }).on('change', function (d3_event, d) {
+             updateOptionValue(d3_event, d.key, d.value);
+           });
+           valuesEnter.append('span').html(function (d) {
+             return _t.html('issues.options.' + d.key + '.' + d.value);
+           });

          }
          }

-       };
-       staticAccessors.DimensionalComparator.get = function () { return DimensionalComparator };
-       staticAccessors.serialVersionUID.get = function () { return 6683108902428366910 };
-       staticAccessors.NULL_ORDINATE.get = function () { return Double.NaN };
-       staticAccessors.X.get = function () { return 0 };
-       staticAccessors.Y.get = function () { return 1 };
-       staticAccessors.Z.get = function () { return 2 };
-
-       Object.defineProperties( Coordinate, staticAccessors );
-
-       var DimensionalComparator = function DimensionalComparator (dimensionsToTest) {
-         this._dimensionsToTest = 2;
-         if (arguments.length === 0) ; else if (arguments.length === 1) {
-           var dimensionsToTest$1 = arguments[0];
-           if (dimensionsToTest$1 !== 2 && dimensionsToTest$1 !== 3) { throw new IllegalArgumentException('only 2 or 3 dimensions may be specified') }
-           this._dimensionsToTest = dimensionsToTest$1;
+
+         function getOptions() {
+           return {
+             what: corePreferences('validate-what') || 'edited',
+             // 'all', 'edited'
+             where: corePreferences('validate-where') || 'all' // 'all', 'visible'
+
+           };

          }
          }

-       };
-       DimensionalComparator.prototype.compare = function compare (o1, o2) {
-         var c1 = o1;
-         var c2 = o2;
-         var compX = DimensionalComparator.compare(c1.x, c2.x);
-         if (compX !== 0) { return compX }
-         var compY = DimensionalComparator.compare(c1.y, c2.y);
-         if (compY !== 0) { return compY }
-         if (this._dimensionsToTest <= 2) { return 0 }
-         var compZ = DimensionalComparator.compare(c1.z, c2.z);
-         return compZ
-       };
-       DimensionalComparator.prototype.interfaces_ = function interfaces_ () {
-         return [Comparator]
-       };
-       DimensionalComparator.prototype.getClass = function getClass () {
-         return DimensionalComparator
-       };
-       DimensionalComparator.compare = function compare (a, b) {
-         if (a < b) { return -1 }
-         if (a > b) { return 1 }
-         if (Double.isNaN(a)) {
-           if (Double.isNaN(b)) { return 0 }
-           return -1
-         }
-         if (Double.isNaN(b)) { return 1 }
-         return 0
-       };

 
 

-       // import hasInterface from '../../../../hasInterface'
-       // import CoordinateSequence from './CoordinateSequence'
+         function updateOptionValue(d3_event, d, val) {
+           if (!val && d3_event && d3_event.target) {
+             val = d3_event.target.value;
+           }

 
 

-       var CoordinateSequenceFactory = function CoordinateSequenceFactory () {};
+           corePreferences('validate-' + d, val);
+           context.validator().validate();
+         }

 
 

-       CoordinateSequenceFactory.prototype.create = function create () {
-         // if (arguments.length === 1) {
-         // if (arguments[0] instanceof Array) {
-         //   let coordinates = arguments[0]
-         // } else if (hasInterface(arguments[0], CoordinateSequence)) {
-         //   let coordSeq = arguments[0]
-         // }
-         // } else if (arguments.length === 2) {
-         // let size = arguments[0]
-         // let dimension = arguments[1]
-         // }
-       };
-       CoordinateSequenceFactory.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       CoordinateSequenceFactory.prototype.getClass = function getClass () {
-         return CoordinateSequenceFactory
-       };
+         return section;
+       }

 
 

-       var Location = function Location () {};
+       function uiSectionValidationRules(context) {
+         var MINSQUARE = 0;
+         var MAXSQUARE = 20;
+         var DEFAULTSQUARE = 5; // see also unsquare_way.js

 
 

-       var staticAccessors$4 = { INTERIOR: { configurable: true },BOUNDARY: { configurable: true },EXTERIOR: { configurable: true },NONE: { configurable: true } };
+         var section = uiSection('issues-rules', context).disclosureContent(renderDisclosureContent).label(_t.html('issues.rules.title'));

 
 

-       Location.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Location.prototype.getClass = function getClass () {
-         return Location
-       };
-       Location.toLocationSymbol = function toLocationSymbol (locationValue) {
-         switch (locationValue) {
-           case Location.EXTERIOR:
-             return 'e'
-           case Location.BOUNDARY:
-             return 'b'
-           case Location.INTERIOR:
-             return 'i'
-           case Location.NONE:
-             return '-'
-         }
-         throw new IllegalArgumentException('Unknown location value: ' + locationValue)
-       };
-       staticAccessors$4.INTERIOR.get = function () { return 0 };
-       staticAccessors$4.BOUNDARY.get = function () { return 1 };
-       staticAccessors$4.EXTERIOR.get = function () { return 2 };
-       staticAccessors$4.NONE.get = function () { return -1 };
+         var _ruleKeys = context.validator().getRuleKeys().filter(function (key) {
+           return key !== 'maprules';
+         }).sort(function (key1, key2) {
+           // alphabetize by localized title
+           return _t('issues.' + key1 + '.title') < _t('issues.' + key2 + '.title') ? -1 : 1;
+         });

 
 

-       Object.defineProperties( Location, staticAccessors$4 );
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.issues-rulelist-container').data([0]);
+           var containerEnter = container.enter().append('div').attr('class', 'issues-rulelist-container');
+           containerEnter.append('ul').attr('class', 'layer-list issue-rules-list');
+           var ruleLinks = containerEnter.append('div').attr('class', 'issue-rules-links section-footer');
+           ruleLinks.append('a').attr('class', 'issue-rules-link').attr('href', '#').html(_t.html('issues.disable_all')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             context.validator().disableRules(_ruleKeys);
+           });
+           ruleLinks.append('a').attr('class', 'issue-rules-link').attr('href', '#').html(_t.html('issues.enable_all')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             context.validator().disableRules([]);
+           }); // Update

 
 

-       var hasInterface = function (o, i) {
-         return o.interfaces_ && o.interfaces_().indexOf(i) > -1
-       };
+           container = container.merge(containerEnter);
+           container.selectAll('.issue-rules-list').call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
+         }

 
 

-       var MathUtil = function MathUtil () {};
+         function drawListItems(selection, data, type, name, change, active) {
+           var items = selection.selectAll('li').data(data); // Exit

 
 

-       var staticAccessors$5 = { LOG_10: { configurable: true } };
+           items.exit().remove(); // Enter

 
 

-       MathUtil.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       MathUtil.prototype.getClass = function getClass () {
-         return MathUtil
-       };
-       MathUtil.log10 = function log10 (x) {
-         var ln = Math.log(x);
-         if (Double.isInfinite(ln)) { return ln }
-         if (Double.isNaN(ln)) { return ln }
-         return ln / MathUtil.LOG_10
-       };
-       MathUtil.min = function min (v1, v2, v3, v4) {
-         var min = v1;
-         if (v2 < min) { min = v2; }
-         if (v3 < min) { min = v3; }
-         if (v4 < min) { min = v4; }
-         return min
-       };
-       MathUtil.clamp = function clamp () {
-         if (typeof arguments[2] === 'number' && (typeof arguments[0] === 'number' && typeof arguments[1] === 'number')) {
-           var x = arguments[0];
-           var min = arguments[1];
-           var max = arguments[2];
-           if (x < min) { return min }
-           if (x > max) { return max }
-           return x
-         } else if (Number.isInteger(arguments[2]) && (Number.isInteger(arguments[0]) && Number.isInteger(arguments[1]))) {
-           var x$1 = arguments[0];
-           var min$1 = arguments[1];
-           var max$1 = arguments[2];
-           if (x$1 < min$1) { return min$1 }
-           if (x$1 > max$1) { return max$1 }
-           return x$1
-         }
-       };
-       MathUtil.wrap = function wrap (index, max) {
-         if (index < 0) {
-           return max - -index % max
-         }
-         return index % max
-       };
-       MathUtil.max = function max () {
-         if (arguments.length === 3) {
-           var v1 = arguments[0];
-           var v2 = arguments[1];
-           var v3 = arguments[2];
-           var max = v1;
-           if (v2 > max) { max = v2; }
-           if (v3 > max) { max = v3; }
-           return max
-         } else if (arguments.length === 4) {
-           var v1$1 = arguments[0];
-           var v2$1 = arguments[1];
-           var v3$1 = arguments[2];
-           var v4 = arguments[3];
-           var max$1 = v1$1;
-           if (v2$1 > max$1) { max$1 = v2$1; }
-           if (v3$1 > max$1) { max$1 = v3$1; }
-           if (v4 > max$1) { max$1 = v4; }
-           return max$1
-         }
-       };
-       MathUtil.average = function average (x1, x2) {
-         return (x1 + x2) / 2.0
-       };
-       staticAccessors$5.LOG_10.get = function () { return Math.log(10) };
+           var enter = items.enter().append('li');

 
 

-       Object.defineProperties( MathUtil, staticAccessors$5 );
+           if (name === 'rule') {
+             enter.call(uiTooltip().title(function (d) {
+               return _t.html('issues.' + d + '.tip');
+             }).placement('top'));
+           }

 
 

-       var StringBuffer = function StringBuffer (str) {
-         this.str = str;
-       };
-       StringBuffer.prototype.append = function append (e) {
-         this.str += e;
-       };
+           var label = enter.append('label');
+           label.append('input').attr('type', type).attr('name', name).on('change', change);
+           label.append('span').html(function (d) {
+             var params = {};

 
 

-       StringBuffer.prototype.setCharAt = function setCharAt (i, c) {
-         this.str = this.str.substr(0, i) + c + this.str.substr(i + 1);
-       };
+             if (d === 'unsquare_way') {
+               params.val = '<span class="square-degrees"></span>';
+             }

 
 

-       StringBuffer.prototype.toString = function toString (e) {
-         return this.str
-       };
+             return _t.html('issues.' + d + '.title', params);
+           }); // Update

 
 

-       var Integer = function Integer (value) {
-         this.value = value;
-       };
-       Integer.prototype.intValue = function intValue () {
-         return this.value
-       };
-       Integer.prototype.compareTo = function compareTo (o) {
-         if (this.value < o) { return -1 }
-         if (this.value > o) { return 1 }
-         return 0
-       };
-       Integer.isNaN = function isNaN (n) { return Number.isNaN(n) };
-
-       var Character = function Character () {};
-
-       Character.isWhitespace = function isWhitespace (c) { return ((c <= 32 && c >= 0) || c === 127) };
-       Character.toUpperCase = function toUpperCase (c) { return c.toUpperCase() };
-
-       var DD = function DD () {
-         this._hi = 0.0;
-         this._lo = 0.0;
-         if (arguments.length === 0) {
-           this.init(0.0);
-         } else if (arguments.length === 1) {
-           if (typeof arguments[0] === 'number') {
-             var x = arguments[0];
-             this.init(x);
-           } else if (arguments[0] instanceof DD) {
-             var dd = arguments[0];
-             this.init(dd);
-           } else if (typeof arguments[0] === 'string') {
-             var str = arguments[0];
-             DD.call(this, DD.parse(str));
-           }
-         } else if (arguments.length === 2) {
-           var hi = arguments[0];
-           var lo = arguments[1];
-           this.init(hi, lo);
-         }
-       };
+           items = items.merge(enter);
+           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false); // user-configurable square threshold

 
 

-       var staticAccessors$7 = { PI: { configurable: true },TWO_PI: { configurable: true },PI_2: { configurable: true },E: { configurable: true },NaN: { configurable: true },EPS: { configurable: true },SPLIT: { configurable: true },MAX_PRINT_DIGITS: { configurable: true },TEN: { configurable: true },ONE: { configurable: true },SCI_NOT_EXPONENT_CHAR: { configurable: true },SCI_NOT_ZERO: { configurable: true } };
-       DD.prototype.le = function le (y) {
-         return (this._hi < y._hi || this._hi === y._hi) && this._lo <= y._lo
-       };
-       DD.prototype.extractSignificantDigits = function extractSignificantDigits (insertDecimalPoint, magnitude) {
-         var y = this.abs();
-         var mag = DD.magnitude(y._hi);
-         var scale = DD.TEN.pow(mag);
-         y = y.divide(scale);
-         if (y.gt(DD.TEN)) {
-           y = y.divide(DD.TEN);
-           mag += 1;
-         } else if (y.lt(DD.ONE)) {
-           y = y.multiply(DD.TEN);
-           mag -= 1;
-         }
-         var decimalPointPos = mag + 1;
-         var buf = new StringBuffer();
-         var numDigits = DD.MAX_PRINT_DIGITS - 1;
-         for (var i = 0; i <= numDigits; i++) {
-           if (insertDecimalPoint && i === decimalPointPos) {
-             buf.append('.');
-           }
-           var digit = Math.trunc(y._hi);
-           if (digit < 0) {
-             break
-           }
-           var rebiasBy10 = false;
-           var digitChar = 0;
-           if (digit > 9) {
-             rebiasBy10 = true;
-             digitChar = '9';
-           } else {
-             digitChar = '0' + digit;
-           }
-           buf.append(digitChar);
-           y = y.subtract(DD.valueOf(digit)).multiply(DD.TEN);
-           if (rebiasBy10) { y.selfAdd(DD.TEN); }
-           var continueExtractingDigits = true;
-           var remMag = DD.magnitude(y._hi);
-           if (remMag < 0 && Math.abs(remMag) >= numDigits - i) { continueExtractingDigits = false; }
-           if (!continueExtractingDigits) { break }
-         }
-         magnitude[0] = mag;
-         return buf.toString()
-       };
-       DD.prototype.sqr = function sqr () {
-         return this.multiply(this)
-       };
-       DD.prototype.doubleValue = function doubleValue () {
-         return this._hi + this._lo
-       };
-       DD.prototype.subtract = function subtract () {
-         if (arguments[0] instanceof DD) {
-           var y = arguments[0];
-           return this.add(y.negate())
-         } else if (typeof arguments[0] === 'number') {
-           var y$1 = arguments[0];
-           return this.add(-y$1)
-         }
-       };
-       DD.prototype.equals = function equals () {
-         if (arguments.length === 1) {
-           var y = arguments[0];
-           return this._hi === y._hi && this._lo === y._lo
-         }
-       };
-       DD.prototype.isZero = function isZero () {
-         return this._hi === 0.0 && this._lo === 0.0
-       };
-       DD.prototype.selfSubtract = function selfSubtract () {
-         if (arguments[0] instanceof DD) {
-           var y = arguments[0];
-           if (this.isNaN()) { return this }
-           return this.selfAdd(-y._hi, -y._lo)
-         } else if (typeof arguments[0] === 'number') {
-           var y$1 = arguments[0];
-           if (this.isNaN()) { return this }
-           return this.selfAdd(-y$1, 0.0)
-         }
-       };
-       DD.prototype.getSpecialNumberString = function getSpecialNumberString () {
-         if (this.isZero()) { return '0.0' }
-         if (this.isNaN()) { return 'NaN ' }
-         return null
-       };
-       DD.prototype.min = function min (x) {
-         if (this.le(x)) {
-           return this
-         } else {
-           return x
-         }
-       };
-       DD.prototype.selfDivide = function selfDivide () {
-         if (arguments.length === 1) {
-           if (arguments[0] instanceof DD) {
-             var y = arguments[0];
-             return this.selfDivide(y._hi, y._lo)
-           } else if (typeof arguments[0] === 'number') {
-             var y$1 = arguments[0];
-             return this.selfDivide(y$1, 0.0)
-           }
-         } else if (arguments.length === 2) {
-           var yhi = arguments[0];
-           var ylo = arguments[1];
-           var hc = null;
-           var tc = null;
-           var hy = null;
-           var ty = null;
-           var C = null;
-           var c = null;
-           var U = null;
-           var u = null;
-           C = this._hi / yhi;
-           c = DD.SPLIT * C;
-           hc = c - C;
-           u = DD.SPLIT * yhi;
-           hc = c - hc;
-           tc = C - hc;
-           hy = u - yhi;
-           U = C * yhi;
-           hy = u - hy;
-           ty = yhi - hy;
-           u = hc * hy - U + hc * ty + tc * hy + tc * ty;
-           c = (this._hi - U - u + this._lo - C * ylo) / yhi;
-           u = C + c;
-           this._hi = u;
-           this._lo = C - u + c;
-           return this
-         }
-       };
-       DD.prototype.dump = function dump () {
-         return 'DD<' + this._hi + ', ' + this._lo + '>'
-       };
-       DD.prototype.divide = function divide () {
-         if (arguments[0] instanceof DD) {
-           var y = arguments[0];
-           var hc = null;
-           var tc = null;
-           var hy = null;
-           var ty = null;
-           var C = null;
-           var c = null;
-           var U = null;
-           var u = null;
-           C = this._hi / y._hi;
-           c = DD.SPLIT * C;
-           hc = c - C;
-           u = DD.SPLIT * y._hi;
-           hc = c - hc;
-           tc = C - hc;
-           hy = u - y._hi;
-           U = C * y._hi;
-           hy = u - hy;
-           ty = y._hi - hy;
-           u = hc * hy - U + hc * ty + tc * hy + tc * ty;
-           c = (this._hi - U - u + this._lo - C * y._lo) / y._hi;
-           u = C + c;
-           var zhi = u;
-           var zlo = C - u + c;
-           return new DD(zhi, zlo)
-         } else if (typeof arguments[0] === 'number') {
-           var y$1 = arguments[0];
-           if (Double.isNaN(y$1)) { return DD.createNaN() }
-           return DD.copy(this).selfDivide(y$1, 0.0)
-         }
-       };
-       DD.prototype.ge = function ge (y) {
-         return (this._hi > y._hi || this._hi === y._hi) && this._lo >= y._lo
-       };
-       DD.prototype.pow = function pow (exp) {
-         if (exp === 0.0) { return DD.valueOf(1.0) }
-         var r = new DD(this);
-         var s = DD.valueOf(1.0);
-         var n = Math.abs(exp);
-         if (n > 1) {
-           while (n > 0) {
-             if (n % 2 === 1) {
-               s.selfMultiply(r);
-             }
-             n /= 2;
-             if (n > 0) { r = r.sqr(); }
+           var degStr = corePreferences('validate-square-degrees');
+
+           if (degStr === null) {
+             degStr = DEFAULTSQUARE.toString();

            }
            }

-         } else {
-           s = r;
-         }
-         if (exp < 0) { return s.reciprocal() }
-         return s
-       };
-       DD.prototype.ceil = function ceil () {
-         if (this.isNaN()) { return DD.NaN }
-         var fhi = Math.ceil(this._hi);
-         var flo = 0.0;
-         if (fhi === this._hi) {
-           flo = Math.ceil(this._lo);
-         }
-         return new DD(fhi, flo)
-       };
-       DD.prototype.compareTo = function compareTo (o) {
-         var other = o;
-         if (this._hi < other._hi) { return -1 }
-         if (this._hi > other._hi) { return 1 }
-         if (this._lo < other._lo) { return -1 }
-         if (this._lo > other._lo) { return 1 }
-         return 0
-       };
-       DD.prototype.rint = function rint () {
-         if (this.isNaN()) { return this }
-         var plus5 = this.add(0.5);
-         return plus5.floor()
-       };
-       DD.prototype.setValue = function setValue () {
-         if (arguments[0] instanceof DD) {
-           var value = arguments[0];
-           this.init(value);
-           return this
-         } else if (typeof arguments[0] === 'number') {
-           var value$1 = arguments[0];
-           this.init(value$1);
-           return this
-         }
-       };
-       DD.prototype.max = function max (x) {
-         if (this.ge(x)) {
-           return this
-         } else {
-           return x
-         }
-       };
-       DD.prototype.sqrt = function sqrt () {
-         if (this.isZero()) { return DD.valueOf(0.0) }
-         if (this.isNegative()) {
-           return DD.NaN
-         }
-         var x = 1.0 / Math.sqrt(this._hi);
-         var ax = this._hi * x;
-         var axdd = DD.valueOf(ax);
-         var diffSq = this.subtract(axdd.sqr());
-         var d2 = diffSq._hi * (x * 0.5);
-         return axdd.add(d2)
-       };
-       DD.prototype.selfAdd = function selfAdd () {
-         if (arguments.length === 1) {
-           if (arguments[0] instanceof DD) {
-             var y = arguments[0];
-             return this.selfAdd(y._hi, y._lo)
-           } else if (typeof arguments[0] === 'number') {
-             var y$1 = arguments[0];
-             var H = null;
-             var h = null;
-             var S = null;
-             var s = null;
-             var e = null;
-             var f = null;
-             S = this._hi + y$1;
-             e = S - this._hi;
-             s = S - e;
-             s = y$1 - e + (this._hi - s);
-             f = s + this._lo;
-             H = S + f;
-             h = f + (S - H);
-             this._hi = H + h;
-             this._lo = h + (H - this._hi);
-             return this
-           }
-         } else if (arguments.length === 2) {
-           var yhi = arguments[0];
-           var ylo = arguments[1];
-           var H$1 = null;
-           var h$1 = null;
-           var T = null;
-           var t = null;
-           var S$1 = null;
-           var s$1 = null;
-           var e$1 = null;
-           var f$1 = null;
-           S$1 = this._hi + yhi;
-           T = this._lo + ylo;
-           e$1 = S$1 - this._hi;
-           f$1 = T - this._lo;
-           s$1 = S$1 - e$1;
-           t = T - f$1;
-           s$1 = yhi - e$1 + (this._hi - s$1);
-           t = ylo - f$1 + (this._lo - t);
-           e$1 = s$1 + T;
-           H$1 = S$1 + e$1;
-           h$1 = e$1 + (S$1 - H$1);
-           e$1 = t + h$1;
-           var zhi = H$1 + e$1;
-           var zlo = e$1 + (H$1 - zhi);
-           this._hi = zhi;
-           this._lo = zlo;
-           return this
-         }
-       };
-       DD.prototype.selfMultiply = function selfMultiply () {
-         if (arguments.length === 1) {
-           if (arguments[0] instanceof DD) {
-             var y = arguments[0];
-             return this.selfMultiply(y._hi, y._lo)
-           } else if (typeof arguments[0] === 'number') {
-             var y$1 = arguments[0];
-             return this.selfMultiply(y$1, 0.0)
-           }
-         } else if (arguments.length === 2) {
-           var yhi = arguments[0];
-           var ylo = arguments[1];
-           var hx = null;
-           var tx = null;
-           var hy = null;
-           var ty = null;
-           var C = null;
-           var c = null;
-           C = DD.SPLIT * this._hi;
-           hx = C - this._hi;
-           c = DD.SPLIT * yhi;
-           hx = C - hx;
-           tx = this._hi - hx;
-           hy = c - yhi;
-           C = this._hi * yhi;
-           hy = c - hy;
-           ty = yhi - hy;
-           c = hx * hy - C + hx * ty + tx * hy + tx * ty + (this._hi * ylo + this._lo * yhi);
-           var zhi = C + c;
-           hx = C - zhi;
-           var zlo = c + hx;
-           this._hi = zhi;
-           this._lo = zlo;
-           return this
-         }
-       };
-       DD.prototype.selfSqr = function selfSqr () {
-         return this.selfMultiply(this)
-       };
-       DD.prototype.floor = function floor () {
-         if (this.isNaN()) { return DD.NaN }
-         var fhi = Math.floor(this._hi);
-         var flo = 0.0;
-         if (fhi === this._hi) {
-           flo = Math.floor(this._lo);
-         }
-         return new DD(fhi, flo)
-       };
-       DD.prototype.negate = function negate () {
-         if (this.isNaN()) { return this }
-         return new DD(-this._hi, -this._lo)
-       };
-       DD.prototype.clone = function clone () {
-         // try {
-         // return null
-         // } catch (ex) {
-         // if (ex instanceof CloneNotSupportedException) {
-         //   return null
-         // } else throw ex
-         // } finally {}
-       };
-       DD.prototype.multiply = function multiply () {
-         if (arguments[0] instanceof DD) {
-           var y = arguments[0];
-           if (y.isNaN()) { return DD.createNaN() }
-           return DD.copy(this).selfMultiply(y)
-         } else if (typeof arguments[0] === 'number') {
-           var y$1 = arguments[0];
-           if (Double.isNaN(y$1)) { return DD.createNaN() }
-           return DD.copy(this).selfMultiply(y$1, 0.0)
-         }
-       };
-       DD.prototype.isNaN = function isNaN () {
-         return Double.isNaN(this._hi)
-       };
-       DD.prototype.intValue = function intValue () {
-         return Math.trunc(this._hi)
-       };
-       DD.prototype.toString = function toString () {
-         var mag = DD.magnitude(this._hi);
-         if (mag >= -3 && mag <= 20) { return this.toStandardNotation() }
-         return this.toSciNotation()
-       };
-       DD.prototype.toStandardNotation = function toStandardNotation () {
-         var specialStr = this.getSpecialNumberString();
-         if (specialStr !== null) { return specialStr }
-         var magnitude = new Array(1).fill(null);
-         var sigDigits = this.extractSignificantDigits(true, magnitude);
-         var decimalPointPos = magnitude[0] + 1;
-         var num = sigDigits;
-         if (sigDigits.charAt(0) === '.') {
-           num = '0' + sigDigits;
-         } else if (decimalPointPos < 0) {
-           num = '0.' + DD.stringOfChar('0', -decimalPointPos) + sigDigits;
-         } else if (sigDigits.indexOf('.') === -1) {
-           var numZeroes = decimalPointPos - sigDigits.length;
-           var zeroes = DD.stringOfChar('0', numZeroes);
-           num = sigDigits + zeroes + '.0';
-         }
-         if (this.isNegative()) { return '-' + num }
-         return num
-       };
-       DD.prototype.reciprocal = function reciprocal () {
-         var hc = null;
-         var tc = null;
-         var hy = null;
-         var ty = null;
-         var C = null;
-         var c = null;
-         var U = null;
-         var u = null;
-         C = 1.0 / this._hi;
-         c = DD.SPLIT * C;
-         hc = c - C;
-         u = DD.SPLIT * this._hi;
-         hc = c - hc;
-         tc = C - hc;
-         hy = u - this._hi;
-         U = C * this._hi;
-         hy = u - hy;
-         ty = this._hi - hy;
-         u = hc * hy - U + hc * ty + tc * hy + tc * ty;
-         c = (1.0 - U - u - C * this._lo) / this._hi;
-         var zhi = C + c;
-         var zlo = C - zhi + c;
-         return new DD(zhi, zlo)
-       };
-       DD.prototype.toSciNotation = function toSciNotation () {
-         if (this.isZero()) { return DD.SCI_NOT_ZERO }
-         var specialStr = this.getSpecialNumberString();
-         if (specialStr !== null) { return specialStr }
-         var magnitude = new Array(1).fill(null);
-         var digits = this.extractSignificantDigits(false, magnitude);
-         var expStr = DD.SCI_NOT_EXPONENT_CHAR + magnitude[0];
-         if (digits.charAt(0) === '0') {
-           throw new Error('Found leading zero: ' + digits)
-         }
-         var trailingDigits = '';
-         if (digits.length > 1) { trailingDigits = digits.substring(1); }
-         var digitsWithDecimal = digits.charAt(0) + '.' + trailingDigits;
-         if (this.isNegative()) { return '-' + digitsWithDecimal + expStr }
-         return digitsWithDecimal + expStr
-       };
-       DD.prototype.abs = function abs () {
-         if (this.isNaN()) { return DD.NaN }
-         if (this.isNegative()) { return this.negate() }
-         return new DD(this)
-       };
-       DD.prototype.isPositive = function isPositive () {
-         return (this._hi > 0.0 || this._hi === 0.0) && this._lo > 0.0
-       };
-       DD.prototype.lt = function lt (y) {
-         return (this._hi < y._hi || this._hi === y._hi) && this._lo < y._lo
-       };
-       DD.prototype.add = function add () {
-         if (arguments[0] instanceof DD) {
-           var y = arguments[0];
-           return DD.copy(this).selfAdd(y)
-         } else if (typeof arguments[0] === 'number') {
-           var y$1 = arguments[0];
-           return DD.copy(this).selfAdd(y$1)
-         }
-       };
-       DD.prototype.init = function init () {
-         if (arguments.length === 1) {
-           if (typeof arguments[0] === 'number') {
-             var x = arguments[0];
-             this._hi = x;
-             this._lo = 0.0;
-           } else if (arguments[0] instanceof DD) {
-             var dd = arguments[0];
-             this._hi = dd._hi;
-             this._lo = dd._lo;
-           }
-         } else if (arguments.length === 2) {
-           var hi = arguments[0];
-           var lo = arguments[1];
-           this._hi = hi;
-           this._lo = lo;
-         }
-       };
-       DD.prototype.gt = function gt (y) {
-         return (this._hi > y._hi || this._hi === y._hi) && this._lo > y._lo
-       };
-       DD.prototype.isNegative = function isNegative () {
-         return (this._hi < 0.0 || this._hi === 0.0) && this._lo < 0.0
-       };
-       DD.prototype.trunc = function trunc () {
-         if (this.isNaN()) { return DD.NaN }
-         if (this.isPositive()) { return this.floor(); } else { return this.ceil() }
-       };
-       DD.prototype.signum = function signum () {
-         if (this._hi > 0) { return 1 }
-         if (this._hi < 0) { return -1 }
-         if (this._lo > 0) { return 1 }
-         if (this._lo < 0) { return -1 }
-         return 0
-       };
-       DD.prototype.interfaces_ = function interfaces_ () {
-         return [Serializable, Comparable, Clonable]
-       };
-       DD.prototype.getClass = function getClass () {
-         return DD
-       };
-       DD.sqr = function sqr (x) {
-         return DD.valueOf(x).selfMultiply(x)
-       };
-       DD.valueOf = function valueOf () {
-         if (typeof arguments[0] === 'string') {
-           var str = arguments[0];
-           return DD.parse(str)
-         } else if (typeof arguments[0] === 'number') {
-           var x = arguments[0];
-           return new DD(x)
+
+           var span = items.selectAll('.square-degrees');
+           var input = span.selectAll('.square-degrees-input').data([0]); // enter / update
+
+           input.enter().append('input').attr('type', 'number').attr('min', MINSQUARE.toString()).attr('max', MAXSQUARE.toString()).attr('step', '0.5').attr('class', 'square-degrees-input').call(utilNoAuto).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+             this.select();
+           }).on('keyup', function (d3_event) {
+             if (d3_event.keyCode === 13) {
+               // ↩ Return
+               this.blur();
+               this.select();
+             }
+           }).on('blur', changeSquare).merge(input).property('value', degStr);

          }
          }

-       };
-       DD.sqrt = function sqrt (x) {
-         return DD.valueOf(x).sqrt()
-       };
-       DD.parse = function parse (str) {
-         var i = 0;
-         var strlen = str.length;
-         while (Character.isWhitespace(str.charAt(i))) { i++; }
-         var isNegative = false;
-         if (i < strlen) {
-           var signCh = str.charAt(i);
-           if (signCh === '-' || signCh === '+') {
-             i++;
-             if (signCh === '-') { isNegative = true; }
+
+         function changeSquare() {
+           var input = select(this);
+           var degStr = utilGetSetValue(input).trim();
+           var degNum = parseFloat(degStr, 10);
+
+           if (!isFinite(degNum)) {
+             degNum = DEFAULTSQUARE;
+           } else if (degNum > MAXSQUARE) {
+             degNum = MAXSQUARE;
+           } else if (degNum < MINSQUARE) {
+             degNum = MINSQUARE;

            }
            }

+
+           degNum = Math.round(degNum * 10) / 10; // round to 1 decimal
+
+           degStr = degNum.toString();
+           input.property('value', degStr);
+           corePreferences('validate-square-degrees', degStr);
+           context.validator().revalidateUnsquare();

          }
          }

-         var val = new DD();
-         var numDigits = 0;
-         var numBeforeDec = 0;
-         var exp = 0;
-         while (true) {
-           if (i >= strlen) { break }
-           var ch = str.charAt(i);
-           i++;
-           if (Character.isDigit(ch)) {
-             var d = ch - '0';
-             val.selfMultiply(DD.TEN);
-             val.selfAdd(d);
-             numDigits++;
-             continue
-           }
-           if (ch === '.') {
-             numBeforeDec = numDigits;
-             continue
-           }
-           if (ch === 'e' || ch === 'E') {
-             var expStr = str.substring(i);
-             try {
-               exp = Integer.parseInt(expStr);
-             } catch (ex) {
-               if (ex instanceof Error) {
-                 throw new Error('Invalid exponent ' + expStr + ' in string ' + str)
-               } else { throw ex }
-             } finally {}
-             break
-           }
-           throw new Error("Unexpected character '" + ch + "' at position " + i + ' in string ' + str)
-         }
-         var val2 = val;
-         var numDecPlaces = numDigits - numBeforeDec - exp;
-         if (numDecPlaces === 0) {
-           val2 = val;
-         } else if (numDecPlaces > 0) {
-           var scale = DD.TEN.pow(numDecPlaces);
-           val2 = val.divide(scale);
-         } else if (numDecPlaces < 0) {
-           var scale$1 = DD.TEN.pow(-numDecPlaces);
-           val2 = val.multiply(scale$1);
-         }
-         if (isNegative) {
-           return val2.negate()
-         }
-         return val2
-       };
-       DD.createNaN = function createNaN () {
-         return new DD(Double.NaN, Double.NaN)
-       };
-       DD.copy = function copy (dd) {
-         return new DD(dd)
-       };
-       DD.magnitude = function magnitude (x) {
-         var xAbs = Math.abs(x);
-         var xLog10 = Math.log(xAbs) / Math.log(10);
-         var xMag = Math.trunc(Math.floor(xLog10));
-         var xApprox = Math.pow(10, xMag);
-         if (xApprox * 10 <= xAbs) { xMag += 1; }
-         return xMag
-       };
-       DD.stringOfChar = function stringOfChar (ch, len) {
-         var buf = new StringBuffer();
-         for (var i = 0; i < len; i++) {
-           buf.append(ch);
-         }
-         return buf.toString()
-       };
-       staticAccessors$7.PI.get = function () { return new DD(3.141592653589793116e+00, 1.224646799147353207e-16) };
-       staticAccessors$7.TWO_PI.get = function () { return new DD(6.283185307179586232e+00, 2.449293598294706414e-16) };
-       staticAccessors$7.PI_2.get = function () { return new DD(1.570796326794896558e+00, 6.123233995736766036e-17) };
-       staticAccessors$7.E.get = function () { return new DD(2.718281828459045091e+00, 1.445646891729250158e-16) };
-       staticAccessors$7.NaN.get = function () { return new DD(Double.NaN, Double.NaN) };
-       staticAccessors$7.EPS.get = function () { return 1.23259516440783e-32 };
-       staticAccessors$7.SPLIT.get = function () { return 134217729.0 };
-       staticAccessors$7.MAX_PRINT_DIGITS.get = function () { return 32 };
-       staticAccessors$7.TEN.get = function () { return DD.valueOf(10.0) };
-       staticAccessors$7.ONE.get = function () { return DD.valueOf(1.0) };
-       staticAccessors$7.SCI_NOT_EXPONENT_CHAR.get = function () { return 'E' };
-       staticAccessors$7.SCI_NOT_ZERO.get = function () { return '0.0E0' };
-
-       Object.defineProperties( DD, staticAccessors$7 );
-
-       var CGAlgorithmsDD = function CGAlgorithmsDD () {};
-
-       var staticAccessors$6 = { DP_SAFE_EPSILON: { configurable: true } };
-
-       CGAlgorithmsDD.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       CGAlgorithmsDD.prototype.getClass = function getClass () {
-         return CGAlgorithmsDD
-       };
-       CGAlgorithmsDD.orientationIndex = function orientationIndex (p1, p2, q) {
-         var index = CGAlgorithmsDD.orientationIndexFilter(p1, p2, q);
-         if (index <= 1) { return index }
-         var dx1 = DD.valueOf(p2.x).selfAdd(-p1.x);
-         var dy1 = DD.valueOf(p2.y).selfAdd(-p1.y);
-         var dx2 = DD.valueOf(q.x).selfAdd(-p2.x);
-         var dy2 = DD.valueOf(q.y).selfAdd(-p2.y);
-         return dx1.selfMultiply(dy2).selfSubtract(dy1.selfMultiply(dx2)).signum()
-       };
-       CGAlgorithmsDD.signOfDet2x2 = function signOfDet2x2 (x1, y1, x2, y2) {
-         var det = x1.multiply(y2).selfSubtract(y1.multiply(x2));
-         return det.signum()
-       };
-       CGAlgorithmsDD.intersection = function intersection (p1, p2, q1, q2) {
-         var denom1 = DD.valueOf(q2.y).selfSubtract(q1.y).selfMultiply(DD.valueOf(p2.x).selfSubtract(p1.x));
-         var denom2 = DD.valueOf(q2.x).selfSubtract(q1.x).selfMultiply(DD.valueOf(p2.y).selfSubtract(p1.y));
-         var denom = denom1.subtract(denom2);
-         var numx1 = DD.valueOf(q2.x).selfSubtract(q1.x).selfMultiply(DD.valueOf(p1.y).selfSubtract(q1.y));
-         var numx2 = DD.valueOf(q2.y).selfSubtract(q1.y).selfMultiply(DD.valueOf(p1.x).selfSubtract(q1.x));
-         var numx = numx1.subtract(numx2);
-         var fracP = numx.selfDivide(denom).doubleValue();
-         var x = DD.valueOf(p1.x).selfAdd(DD.valueOf(p2.x).selfSubtract(p1.x).selfMultiply(fracP)).doubleValue();
-         var numy1 = DD.valueOf(p2.x).selfSubtract(p1.x).selfMultiply(DD.valueOf(p1.y).selfSubtract(q1.y));
-         var numy2 = DD.valueOf(p2.y).selfSubtract(p1.y).selfMultiply(DD.valueOf(p1.x).selfSubtract(q1.x));
-         var numy = numy1.subtract(numy2);
-         var fracQ = numy.selfDivide(denom).doubleValue();
-         var y = DD.valueOf(q1.y).selfAdd(DD.valueOf(q2.y).selfSubtract(q1.y).selfMultiply(fracQ)).doubleValue();
-         return new Coordinate(x, y)
-       };
-       CGAlgorithmsDD.orientationIndexFilter = function orientationIndexFilter (pa, pb, pc) {
-         var detsum = null;
-         var detleft = (pa.x - pc.x) * (pb.y - pc.y);
-         var detright = (pa.y - pc.y) * (pb.x - pc.x);
-         var det = detleft - detright;
-         if (detleft > 0.0) {
-           if (detright <= 0.0) {
-             return CGAlgorithmsDD.signum(det)
-           } else {
-             detsum = detleft + detright;
-           }
-         } else if (detleft < 0.0) {
-           if (detright >= 0.0) {
-             return CGAlgorithmsDD.signum(det)
-           } else {
-             detsum = -detleft - detright;
-           }
-         } else {
-           return CGAlgorithmsDD.signum(det)
+
+         function isRuleEnabled(d) {
+           return context.validator().isRuleEnabled(d);

          }
          }

-         var errbound = CGAlgorithmsDD.DP_SAFE_EPSILON * detsum;
-         if (det >= errbound || -det >= errbound) {
-           return CGAlgorithmsDD.signum(det)
+
+         function toggleRule(d3_event, d) {
+           context.validator().toggleRule(d);

          }
          }

-         return 2
-       };
-       CGAlgorithmsDD.signum = function signum (x) {
-         if (x > 0) { return 1 }
-         if (x < 0) { return -1 }
-         return 0
-       };
-       staticAccessors$6.DP_SAFE_EPSILON.get = function () { return 1e-15 };
-
-       Object.defineProperties( CGAlgorithmsDD, staticAccessors$6 );
-
-       var CoordinateSequence = function CoordinateSequence () {};
-
-       var staticAccessors$8 = { X: { configurable: true },Y: { configurable: true },Z: { configurable: true },M: { configurable: true } };
-
-       staticAccessors$8.X.get = function () { return 0 };
-       staticAccessors$8.Y.get = function () { return 1 };
-       staticAccessors$8.Z.get = function () { return 2 };
-       staticAccessors$8.M.get = function () { return 3 };
-       CoordinateSequence.prototype.setOrdinate = function setOrdinate (index, ordinateIndex, value) {};
-       CoordinateSequence.prototype.size = function size () {};
-       CoordinateSequence.prototype.getOrdinate = function getOrdinate (index, ordinateIndex) {};
-       CoordinateSequence.prototype.getCoordinate = function getCoordinate () {};
-       CoordinateSequence.prototype.getCoordinateCopy = function getCoordinateCopy (i) {};
-       CoordinateSequence.prototype.getDimension = function getDimension () {};
-       CoordinateSequence.prototype.getX = function getX (index) {};
-       CoordinateSequence.prototype.clone = function clone () {};
-       CoordinateSequence.prototype.expandEnvelope = function expandEnvelope (env) {};
-       CoordinateSequence.prototype.copy = function copy () {};
-       CoordinateSequence.prototype.getY = function getY (index) {};
-       CoordinateSequence.prototype.toCoordinateArray = function toCoordinateArray () {};
-       CoordinateSequence.prototype.interfaces_ = function interfaces_ () {
-         return [Clonable]
-       };
-       CoordinateSequence.prototype.getClass = function getClass () {
-         return CoordinateSequence
-       };

 
 

-       Object.defineProperties( CoordinateSequence, staticAccessors$8 );
+         context.validator().on('validated.uiSectionValidationRules', function () {
+           window.requestIdleCallback(section.reRender);
+         });
+         return section;
+       }
+
+       function uiSectionValidationStatus(context) {
+         var section = uiSection('issues-status', context).content(renderContent).shouldDisplay(function () {
+           var issues = context.validator().getIssues(getOptions());
+           return issues.length === 0;
+         });

 
 

-       var Exception = function Exception () {};
+         function getOptions() {
+           return {
+             what: corePreferences('validate-what') || 'edited',
+             where: corePreferences('validate-where') || 'all'
+           };
+         }

 
 

-       var NotRepresentableException = (function (Exception$$1) {
-         function NotRepresentableException () {
-           Exception$$1.call(this, 'Projective point not representable on the Cartesian plane.');
+         function renderContent(selection) {
+           var box = selection.selectAll('.box').data([0]);
+           var boxEnter = box.enter().append('div').attr('class', 'box');
+           boxEnter.append('div').call(svgIcon('#iD-icon-apply', 'pre-text'));
+           var noIssuesMessage = boxEnter.append('span');
+           noIssuesMessage.append('strong').attr('class', 'message');
+           noIssuesMessage.append('br');
+           noIssuesMessage.append('span').attr('class', 'details');
+           renderIgnoredIssuesReset(selection);
+           setNoIssuesText(selection);

          }
 
          }
 

-         if ( Exception$$1 ) { NotRepresentableException.__proto__ = Exception$$1; }
-         NotRepresentableException.prototype = Object.create( Exception$$1 && Exception$$1.prototype );
-         NotRepresentableException.prototype.constructor = NotRepresentableException;
-         NotRepresentableException.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         NotRepresentableException.prototype.getClass = function getClass () {
-           return NotRepresentableException
-         };
+         function renderIgnoredIssuesReset(selection) {
+           var ignoredIssues = context.validator().getIssues({
+             what: 'all',
+             where: 'all',
+             includeDisabledRules: true,
+             includeIgnored: 'only'
+           });
+           var resetIgnored = selection.selectAll('.reset-ignored').data(ignoredIssues.length ? [0] : []); // exit

 
 

-         return NotRepresentableException;
-       }(Exception));
+           resetIgnored.exit().remove(); // enter

 
 

-       var System = function System () {};
+           var resetIgnoredEnter = resetIgnored.enter().append('div').attr('class', 'reset-ignored section-footer');
+           resetIgnoredEnter.append('a').attr('href', '#'); // update

 
 

-       System.arraycopy = function arraycopy (src, srcPos, dest, destPos, len) {
-         var c = 0;
-         for (var i = srcPos; i < srcPos + len; i++) {
-           dest[destPos + c] = src[i];
-           c++;
+           resetIgnored = resetIgnored.merge(resetIgnoredEnter);
+           resetIgnored.select('a').html(_t('inspector.title_count', {
+             title: _t.html('issues.reset_ignored'),
+             count: ignoredIssues.length
+           }));
+           resetIgnored.on('click', function (d3_event) {
+             d3_event.preventDefault();
+             context.validator().resetIgnoredIssues();
+           });

          }
          }

-       };

 
 

-       System.getProperty = function getProperty (name) {
-         return {
-           'line.separator': '\n'
-         }[name]
-       };
+         function setNoIssuesText(selection) {
+           var opts = getOptions();

 
 

-       var HCoordinate = function HCoordinate () {
-         this.x = null;
-         this.y = null;
-         this.w = null;
-         if (arguments.length === 0) {
-           this.x = 0.0;
-           this.y = 0.0;
-           this.w = 1.0;
-         } else if (arguments.length === 1) {
-           var p = arguments[0];
-           this.x = p.x;
-           this.y = p.y;
-           this.w = 1.0;
-         } else if (arguments.length === 2) {
-           if (typeof arguments[0] === 'number' && typeof arguments[1] === 'number') {
-             var _x = arguments[0];
-             var _y = arguments[1];
-             this.x = _x;
-             this.y = _y;
-             this.w = 1.0;
-           } else if (arguments[0] instanceof HCoordinate && arguments[1] instanceof HCoordinate) {
-             var p1 = arguments[0];
-             var p2 = arguments[1];
-             this.x = p1.y * p2.w - p2.y * p1.w;
-             this.y = p2.x * p1.w - p1.x * p2.w;
-             this.w = p1.x * p2.y - p2.x * p1.y;
-           } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Coordinate) {
-             var p1$1 = arguments[0];
-             var p2$1 = arguments[1];
-             this.x = p1$1.y - p2$1.y;
-             this.y = p2$1.x - p1$1.x;
-             this.w = p1$1.x * p2$1.y - p2$1.x * p1$1.y;
-           }
-         } else if (arguments.length === 3) {
-           var _x$1 = arguments[0];
-           var _y$1 = arguments[1];
-           var _w = arguments[2];
-           this.x = _x$1;
-           this.y = _y$1;
-           this.w = _w;
-         } else if (arguments.length === 4) {
-           var p1$2 = arguments[0];
-           var p2$2 = arguments[1];
-           var q1 = arguments[2];
-           var q2 = arguments[3];
-           var px = p1$2.y - p2$2.y;
-           var py = p2$2.x - p1$2.x;
-           var pw = p1$2.x * p2$2.y - p2$2.x * p1$2.y;
-           var qx = q1.y - q2.y;
-           var qy = q2.x - q1.x;
-           var qw = q1.x * q2.y - q2.x * q1.y;
-           this.x = py * qw - qy * pw;
-           this.y = qx * pw - px * qw;
-           this.w = px * qy - qx * py;
-         }
-       };
-       HCoordinate.prototype.getY = function getY () {
-         var a = this.y / this.w;
-         if (Double.isNaN(a) || Double.isInfinite(a)) {
-           throw new NotRepresentableException()
-         }
-         return a
-       };
-       HCoordinate.prototype.getX = function getX () {
-         var a = this.x / this.w;
-         if (Double.isNaN(a) || Double.isInfinite(a)) {
-           throw new NotRepresentableException()
-         }
-         return a
-       };
-       HCoordinate.prototype.getCoordinate = function getCoordinate () {
-         var p = new Coordinate();
-         p.x = this.getX();
-         p.y = this.getY();
-         return p
-       };
-       HCoordinate.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       HCoordinate.prototype.getClass = function getClass () {
-         return HCoordinate
-       };
-       HCoordinate.intersection = function intersection (p1, p2, q1, q2) {
-         var px = p1.y - p2.y;
-         var py = p2.x - p1.x;
-         var pw = p1.x * p2.y - p2.x * p1.y;
-         var qx = q1.y - q2.y;
-         var qy = q2.x - q1.x;
-         var qw = q1.x * q2.y - q2.x * q1.y;
-         var x = py * qw - qy * pw;
-         var y = qx * pw - px * qw;
-         var w = px * qy - qx * py;
-         var xInt = x / w;
-         var yInt = y / w;
-         if (Double.isNaN(xInt) || (Double.isInfinite(xInt) || Double.isNaN(yInt)) || Double.isInfinite(yInt)) {
-           throw new NotRepresentableException()
-         }
-         return new Coordinate(xInt, yInt)
-       };
+           function checkForHiddenIssues(cases) {
+             for (var type in cases) {
+               var hiddenOpts = cases[type];
+               var hiddenIssues = context.validator().getIssues(hiddenOpts);

 
 

-       var Envelope = function Envelope () {
-         this._minx = null;
-         this._maxx = null;
-         this._miny = null;
-         this._maxy = null;
-         if (arguments.length === 0) {
-           this.init();
-         } else if (arguments.length === 1) {
-           if (arguments[0] instanceof Coordinate) {
-             var p = arguments[0];
-             this.init(p.x, p.x, p.y, p.y);
-           } else if (arguments[0] instanceof Envelope) {
-             var env = arguments[0];
-             this.init(env);
-           }
-         } else if (arguments.length === 2) {
-           var p1 = arguments[0];
-           var p2 = arguments[1];
-           this.init(p1.x, p2.x, p1.y, p2.y);
-         } else if (arguments.length === 4) {
-           var x1 = arguments[0];
-           var x2 = arguments[1];
-           var y1 = arguments[2];
-           var y2 = arguments[3];
-           this.init(x1, x2, y1, y2);
-         }
-       };
+               if (hiddenIssues.length) {
+                 selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.' + type, {
+                   count: hiddenIssues.length.toString()
+                 }));
+                 return;
+               }
+             }

 
 

-       var staticAccessors$9 = { serialVersionUID: { configurable: true } };
-       Envelope.prototype.getArea = function getArea () {
-         return this.getWidth() * this.getHeight()
-       };
-       Envelope.prototype.equals = function equals (other) {
-         if (!(other instanceof Envelope)) {
-           return false
-         }
-         var otherEnvelope = other;
-         if (this.isNull()) {
-           return otherEnvelope.isNull()
-         }
-         return this._maxx === otherEnvelope.getMaxX() && this._maxy === otherEnvelope.getMaxY() && this._minx === otherEnvelope.getMinX() && this._miny === otherEnvelope.getMinY()
-       };
-       Envelope.prototype.intersection = function intersection (env) {
-         if (this.isNull() || env.isNull() || !this.intersects(env)) { return new Envelope() }
-         var intMinX = this._minx > env._minx ? this._minx : env._minx;
-         var intMinY = this._miny > env._miny ? this._miny : env._miny;
-         var intMaxX = this._maxx < env._maxx ? this._maxx : env._maxx;
-         var intMaxY = this._maxy < env._maxy ? this._maxy : env._maxy;
-         return new Envelope(intMinX, intMaxX, intMinY, intMaxY)
-       };
-       Envelope.prototype.isNull = function isNull () {
-         return this._maxx < this._minx
-       };
-       Envelope.prototype.getMaxX = function getMaxX () {
-         return this._maxx
-       };
-       Envelope.prototype.covers = function covers () {
-         if (arguments.length === 1) {
-           if (arguments[0] instanceof Coordinate) {
-             var p = arguments[0];
-             return this.covers(p.x, p.y)
-           } else if (arguments[0] instanceof Envelope) {
-             var other = arguments[0];
-             if (this.isNull() || other.isNull()) {
-               return false
-             }
-             return other.getMinX() >= this._minx && other.getMaxX() <= this._maxx && other.getMinY() >= this._miny && other.getMaxY() <= this._maxy
-           }
-         } else if (arguments.length === 2) {
-           var x = arguments[0];
-           var y = arguments[1];
-           if (this.isNull()) { return false }
-           return x >= this._minx && x <= this._maxx && y >= this._miny && y <= this._maxy
-         }
-       };
-       Envelope.prototype.intersects = function intersects () {
-         if (arguments.length === 1) {
-           if (arguments[0] instanceof Envelope) {
-             var other = arguments[0];
-             if (this.isNull() || other.isNull()) {
-               return false
-             }
-             return !(other._minx > this._maxx || other._maxx < this._minx || other._miny > this._maxy || other._maxy < this._miny)
-           } else if (arguments[0] instanceof Coordinate) {
-             var p = arguments[0];
-             return this.intersects(p.x, p.y)
-           }
-         } else if (arguments.length === 2) {
-           var x = arguments[0];
-           var y = arguments[1];
-           if (this.isNull()) { return false }
-           return !(x > this._maxx || x < this._minx || y > this._maxy || y < this._miny)
-         }
-       };
-       Envelope.prototype.getMinY = function getMinY () {
-         return this._miny
-       };
-       Envelope.prototype.getMinX = function getMinX () {
-         return this._minx
-       };
-       Envelope.prototype.expandToInclude = function expandToInclude () {
-         if (arguments.length === 1) {
-           if (arguments[0] instanceof Coordinate) {
-             var p = arguments[0];
-             this.expandToInclude(p.x, p.y);
-           } else if (arguments[0] instanceof Envelope) {
-             var other = arguments[0];
-             if (other.isNull()) {
-               return null
-             }
-             if (this.isNull()) {
-               this._minx = other.getMinX();
-               this._maxx = other.getMaxX();
-               this._miny = other.getMinY();
-               this._maxy = other.getMaxY();
-             } else {
-               if (other._minx < this._minx) {
-                 this._minx = other._minx;
+             selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.none'));
+           }
+
+           var messageType;
+
+           if (opts.what === 'edited' && opts.where === 'visible') {
+             messageType = 'edits_in_view';
+             checkForHiddenIssues({
+               elsewhere: {
+                 what: 'edited',
+                 where: 'all'
+               },
+               everything_else: {
+                 what: 'all',
+                 where: 'visible'
+               },
+               disabled_rules: {
+                 what: 'edited',
+                 where: 'visible',
+                 includeDisabledRules: 'only'
+               },
+               everything_else_elsewhere: {
+                 what: 'all',
+                 where: 'all'
+               },
+               disabled_rules_elsewhere: {
+                 what: 'edited',
+                 where: 'all',
+                 includeDisabledRules: 'only'
+               },
+               ignored_issues: {
+                 what: 'edited',
+                 where: 'visible',
+                 includeIgnored: 'only'
+               },
+               ignored_issues_elsewhere: {
+                 what: 'edited',
+                 where: 'all',
+                 includeIgnored: 'only'

                }
                }

-               if (other._maxx > this._maxx) {
-                 this._maxx = other._maxx;
+             });
+           } else if (opts.what === 'edited' && opts.where === 'all') {
+             messageType = 'edits';
+             checkForHiddenIssues({
+               everything_else: {
+                 what: 'all',
+                 where: 'all'
+               },
+               disabled_rules: {
+                 what: 'edited',
+                 where: 'all',
+                 includeDisabledRules: 'only'
+               },
+               ignored_issues: {
+                 what: 'edited',
+                 where: 'all',
+                 includeIgnored: 'only'

                }
                }

-               if (other._miny < this._miny) {
-                 this._miny = other._miny;
+             });
+           } else if (opts.what === 'all' && opts.where === 'visible') {
+             messageType = 'everything_in_view';
+             checkForHiddenIssues({
+               elsewhere: {
+                 what: 'all',
+                 where: 'all'
+               },
+               disabled_rules: {
+                 what: 'all',
+                 where: 'visible',
+                 includeDisabledRules: 'only'
+               },
+               disabled_rules_elsewhere: {
+                 what: 'all',
+                 where: 'all',
+                 includeDisabledRules: 'only'
+               },
+               ignored_issues: {
+                 what: 'all',
+                 where: 'visible',
+                 includeIgnored: 'only'
+               },
+               ignored_issues_elsewhere: {
+                 what: 'all',
+                 where: 'all',
+                 includeIgnored: 'only'

                }
                }

-               if (other._maxy > this._maxy) {
-                 this._maxy = other._maxy;
+             });
+           } else if (opts.what === 'all' && opts.where === 'all') {
+             messageType = 'everything';
+             checkForHiddenIssues({
+               disabled_rules: {
+                 what: 'all',
+                 where: 'all',
+                 includeDisabledRules: 'only'
+               },
+               ignored_issues: {
+                 what: 'all',
+                 where: 'all',
+                 includeIgnored: 'only'

                }
                }

-             }
-           }
-         } else if (arguments.length === 2) {
-           var x = arguments[0];
-           var y = arguments[1];
-           if (this.isNull()) {
-             this._minx = x;
-             this._maxx = x;
-             this._miny = y;
-             this._maxy = y;
-           } else {
-             if (x < this._minx) {
-               this._minx = x;
-             }
-             if (x > this._maxx) {
-               this._maxx = x;
-             }
-             if (y < this._miny) {
-               this._miny = y;
-             }
-             if (y > this._maxy) {
-               this._maxy = y;
-             }
-           }
-         }
-       };
-       Envelope.prototype.minExtent = function minExtent () {
-         if (this.isNull()) { return 0.0 }
-         var w = this.getWidth();
-         var h = this.getHeight();
-         if (w < h) { return w }
-         return h
-       };
-       Envelope.prototype.getWidth = function getWidth () {
-         if (this.isNull()) {
-           return 0
-         }
-         return this._maxx - this._minx
-       };
-       Envelope.prototype.compareTo = function compareTo (o) {
-         var env = o;
-         if (this.isNull()) {
-           if (env.isNull()) { return 0 }
-           return -1
-         } else {
-           if (env.isNull()) { return 1 }
-         }
-         if (this._minx < env._minx) { return -1 }
-         if (this._minx > env._minx) { return 1 }
-         if (this._miny < env._miny) { return -1 }
-         if (this._miny > env._miny) { return 1 }
-         if (this._maxx < env._maxx) { return -1 }
-         if (this._maxx > env._maxx) { return 1 }
-         if (this._maxy < env._maxy) { return -1 }
-         if (this._maxy > env._maxy) { return 1 }
-         return 0
-       };
-       Envelope.prototype.translate = function translate (transX, transY) {
-         if (this.isNull()) {
-           return null
-         }
-         this.init(this.getMinX() + transX, this.getMaxX() + transX, this.getMinY() + transY, this.getMaxY() + transY);
-       };
-       Envelope.prototype.toString = function toString () {
-         return 'Env[' + this._minx + ' : ' + this._maxx + ', ' + this._miny + ' : ' + this._maxy + ']'
-       };
-       Envelope.prototype.setToNull = function setToNull () {
-         this._minx = 0;
-         this._maxx = -1;
-         this._miny = 0;
-         this._maxy = -1;
-       };
-       Envelope.prototype.getHeight = function getHeight () {
-         if (this.isNull()) {
-           return 0
-         }
-         return this._maxy - this._miny
-       };
-       Envelope.prototype.maxExtent = function maxExtent () {
-         if (this.isNull()) { return 0.0 }
-         var w = this.getWidth();
-         var h = this.getHeight();
-         if (w > h) { return w }
-         return h
-       };
-       Envelope.prototype.expandBy = function expandBy () {
-         if (arguments.length === 1) {
-           var distance = arguments[0];
-           this.expandBy(distance, distance);
-         } else if (arguments.length === 2) {
-           var deltaX = arguments[0];
-           var deltaY = arguments[1];
-           if (this.isNull()) { return null }
-           this._minx -= deltaX;
-           this._maxx += deltaX;
-           this._miny -= deltaY;
-           this._maxy += deltaY;
-           if (this._minx > this._maxx || this._miny > this._maxy) { this.setToNull(); }
-         }
-       };
-       Envelope.prototype.contains = function contains () {
-         if (arguments.length === 1) {
-           if (arguments[0] instanceof Envelope) {
-             var other = arguments[0];
-             return this.covers(other)
-           } else if (arguments[0] instanceof Coordinate) {
-             var p = arguments[0];
-             return this.covers(p)
-           }
-         } else if (arguments.length === 2) {
-           var x = arguments[0];
-           var y = arguments[1];
-           return this.covers(x, y)
-         }
-       };
-       Envelope.prototype.centre = function centre () {
-         if (this.isNull()) { return null }
-         return new Coordinate((this.getMinX() + this.getMaxX()) / 2.0, (this.getMinY() + this.getMaxY()) / 2.0)
-       };
-       Envelope.prototype.init = function init () {
-         if (arguments.length === 0) {
-           this.setToNull();
-         } else if (arguments.length === 1) {
-           if (arguments[0] instanceof Coordinate) {
-             var p = arguments[0];
-             this.init(p.x, p.x, p.y, p.y);
-           } else if (arguments[0] instanceof Envelope) {
-             var env = arguments[0];
-             this._minx = env._minx;
-             this._maxx = env._maxx;
-             this._miny = env._miny;
-             this._maxy = env._maxy;
-           }
-         } else if (arguments.length === 2) {
-           var p1 = arguments[0];
-           var p2 = arguments[1];
-           this.init(p1.x, p2.x, p1.y, p2.y);
-         } else if (arguments.length === 4) {
-           var x1 = arguments[0];
-           var x2 = arguments[1];
-           var y1 = arguments[2];
-           var y2 = arguments[3];
-           if (x1 < x2) {
-             this._minx = x1;
-             this._maxx = x2;
-           } else {
-             this._minx = x2;
-             this._maxx = x1;
-           }
-           if (y1 < y2) {
-             this._miny = y1;
-             this._maxy = y2;
-           } else {
-             this._miny = y2;
-             this._maxy = y1;
+             });

            }
            }

-         }
-       };
-       Envelope.prototype.getMaxY = function getMaxY () {
-         return this._maxy
-       };
-       Envelope.prototype.distance = function distance (env) {
-         if (this.intersects(env)) { return 0 }
-         var dx = 0.0;
-         if (this._maxx < env._minx) { dx = env._minx - this._maxx; } else if (this._minx > env._maxx) { dx = this._minx - env._maxx; }
-         var dy = 0.0;
-         if (this._maxy < env._miny) { dy = env._miny - this._maxy; } else if (this._miny > env._maxy) { dy = this._miny - env._maxy; }
-         if (dx === 0.0) { return dy }
-         if (dy === 0.0) { return dx }
-         return Math.sqrt(dx * dx + dy * dy)
-       };
-       Envelope.prototype.hashCode = function hashCode () {
-         var result = 17;
-         result = 37 * result + Coordinate.hashCode(this._minx);
-         result = 37 * result + Coordinate.hashCode(this._maxx);
-         result = 37 * result + Coordinate.hashCode(this._miny);
-         result = 37 * result + Coordinate.hashCode(this._maxy);
-         return result
-       };
-       Envelope.prototype.interfaces_ = function interfaces_ () {
-         return [Comparable, Serializable]
-       };
-       Envelope.prototype.getClass = function getClass () {
-         return Envelope
-       };
-       Envelope.intersects = function intersects () {
-         if (arguments.length === 3) {
-           var p1 = arguments[0];
-           var p2 = arguments[1];
-           var q = arguments[2];
-           if (q.x >= (p1.x < p2.x ? p1.x : p2.x) && q.x <= (p1.x > p2.x ? p1.x : p2.x) && (q.y >= (p1.y < p2.y ? p1.y : p2.y) && q.y <= (p1.y > p2.y ? p1.y : p2.y))) {
-             return true
-           }
-           return false
-         } else if (arguments.length === 4) {
-           var p1$1 = arguments[0];
-           var p2$1 = arguments[1];
-           var q1 = arguments[2];
-           var q2 = arguments[3];
-           var minq = Math.min(q1.x, q2.x);
-           var maxq = Math.max(q1.x, q2.x);
-           var minp = Math.min(p1$1.x, p2$1.x);
-           var maxp = Math.max(p1$1.x, p2$1.x);
-           if (minp > maxq) { return false }
-           if (maxp < minq) { return false }
-           minq = Math.min(q1.y, q2.y);
-           maxq = Math.max(q1.y, q2.y);
-           minp = Math.min(p1$1.y, p2$1.y);
-           maxp = Math.max(p1$1.y, p2$1.y);
-           if (minp > maxq) { return false }
-           if (maxp < minq) { return false }
-           return true
-         }
-       };
-       staticAccessors$9.serialVersionUID.get = function () { return 5873921885273102420 };

 
 

-       Object.defineProperties( Envelope, staticAccessors$9 );
-
-       var regExes = {
-         'typeStr': /^\s*(\w+)\s*\(\s*(.*)\s*\)\s*$/,
-         'emptyTypeStr': /^\s*(\w+)\s*EMPTY\s*$/,
-         'spaces': /\s+/,
-         'parenComma': /\)\s*,\s*\(/,
-         'doubleParenComma': /\)\s*\)\s*,\s*\(\s*\(/, // can't use {2} here
-         'trimParens': /^\s*\(?(.*?)\)?\s*$/
-       };
-
-       /**
-        * Class for reading and writing Well-Known Text.
-        *
-        * NOTE: Adapted from OpenLayers 2.11 implementation.
-        */
-
-       /** Create a new parser for WKT
-        *
-        * @param {GeometryFactory} geometryFactory
-        * @return An instance of WKTParser.
-        * @constructor
-        * @private
-        */
-       var WKTParser = function WKTParser (geometryFactory) {
-         this.geometryFactory = geometryFactory || new GeometryFactory();
-       };
-       /**
-        * Deserialize a WKT string and return a geometry. Supports WKT for POINT,
-        * MULTIPOINT, LINESTRING, LINEARRING, MULTILINESTRING, POLYGON, MULTIPOLYGON,
-        * and GEOMETRYCOLLECTION.
-        *
-        * @param {String} wkt A WKT string.
-        * @return {Geometry} A geometry instance.
-        * @private
-        */
-       WKTParser.prototype.read = function read (wkt) {
-         var geometry, type, str;
-         wkt = wkt.replace(/[\n\r]/g, ' ');
-         var matches = regExes.typeStr.exec(wkt);
-         if (wkt.search('EMPTY') !== -1) {
-           matches = regExes.emptyTypeStr.exec(wkt);
-           matches[2] = undefined;
-         }
-         if (matches) {
-           type = matches[1].toLowerCase();
-           str = matches[2];
-           if (parse$1[type]) {
-             geometry = parse$1[type].apply(this, [str]);
+           if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
+             messageType = 'no_edits';

            }
            }

+
+           selection.select('.box .message').html(_t.html('issues.no_issues.message.' + messageType));

          }
 
          }
 

-         if (geometry === undefined) { throw new Error('Could not parse WKT ' + wkt) }
+         context.validator().on('validated.uiSectionValidationStatus', function () {
+           window.requestIdleCallback(section.reRender);
+         });
+         context.map().on('move.uiSectionValidationStatus', debounce(function () {
+           window.requestIdleCallback(section.reRender);
+         }, 1000));
+         return section;
+       }

 
 

-         return geometry
-       };
+       function uiPaneIssues(context) {
+         var issuesPane = uiPane('issues', context).key(_t('issues.key')).label(_t.html('issues.title')).description(_t.html('issues.title')).iconName('iD-icon-alert').sections([uiSectionValidationOptions(context), uiSectionValidationStatus(context), uiSectionValidationIssues('issues-errors', 'error', context), uiSectionValidationIssues('issues-warnings', 'warning', context), uiSectionValidationRules(context)]);
+         return issuesPane;
+       }

 
 

-       /**
-        * Serialize a geometry into a WKT string.
-        *
-        * @param {Geometry} geometry A feature or array of features.
-        * @return {String} The WKT string representation of the input geometries.
-        * @private
-        */
-       WKTParser.prototype.write = function write (geometry) {
-         return this.extractGeometry(geometry)
-       };
+       function uiSettingsCustomData(context) {
+         var dispatch = dispatch$8('change');
+
+         function render(selection) {
+           var dataLayer = context.layers().layer('data'); // keep separate copies of original and current settings
+
+           var _origSettings = {
+             fileList: dataLayer && dataLayer.fileList() || null,
+             url: corePreferences('settings-custom-data-url')
+           };
+           var _currSettings = {
+             fileList: dataLayer && dataLayer.fileList() || null,
+             url: corePreferences('settings-custom-data-url')
+           }; // var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
+
+           var modal = uiConfirm(selection).okButton();
+           modal.classed('settings-modal settings-custom-data', true);
+           modal.select('.modal-section.header').append('h3').html(_t.html('settings.custom_data.header'));
+           var textSection = modal.select('.modal-section.message-text');
+           textSection.append('pre').attr('class', 'instructions-file').html(_t.html('settings.custom_data.file.instructions'));
+           textSection.append('input').attr('class', 'field-file').attr('type', 'file').property('files', _currSettings.fileList) // works for all except IE11
+           .on('change', function (d3_event) {
+             var files = d3_event.target.files;
+
+             if (files && files.length) {
+               _currSettings.url = '';
+               textSection.select('.field-url').property('value', '');
+               _currSettings.fileList = files;
+             } else {
+               _currSettings.fileList = null;
+             }
+           });
+           textSection.append('h4').html(_t.html('settings.custom_data.or'));
+           textSection.append('pre').attr('class', 'instructions-url').html(_t.html('settings.custom_data.url.instructions'));
+           textSection.append('textarea').attr('class', 'field-url').attr('placeholder', _t('settings.custom_data.url.placeholder')).call(utilNoAuto).property('value', _currSettings.url); // insert a cancel button

 
 

-       /**
-        * Entry point to construct the WKT for a single Geometry object.
-        *
-        * @param {Geometry} geometry
-        * @return {String} A WKT string of representing the geometry.
-        * @private
-        */
-       WKTParser.prototype.extractGeometry = function extractGeometry (geometry) {
-         var type = geometry.getGeometryType().toLowerCase();
-         if (!extract$1[type]) {
-           return null
-         }
-         var wktType = type.toUpperCase();
-         var data;
-         if (geometry.isEmpty()) {
-           data = wktType + ' EMPTY';
-         } else {
-           data = wktType + '(' + extract$1[type].apply(this, [geometry]) + ')';
-         }
-         return data
-       };
+           var buttonSection = modal.select('.modal-section.buttons');
+           buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
+           buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
+           buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);

 
 

-       /**
-        * Object with properties corresponding to the geometry types. Property values
-        * are functions that do the actual data extraction.
-        * @private
-        */
-       var extract$1 = {
-         coordinate: function coordinate (coordinate$1) {
-           return coordinate$1.x + ' ' + coordinate$1.y
-         },
+           function isSaveDisabled() {
+             return null;
+           } // restore the original url

 
 

-         /**
-          * Return a space delimited string of point coordinates.
-          *
-          * @param {Point}
-          *          point
-          * @return {String} A string of coordinates representing the point.
-          */
-         point: function point (point$1) {
-           return extract$1.coordinate.call(this, point$1._coordinates._coordinates[0])
-         },

 
 

-         /**
-          * Return a comma delimited string of point coordinates from a multipoint.
-          *
-          * @param {MultiPoint}
-          *          multipoint
-          * @return {String} A string of point coordinate strings representing the
-          *         multipoint.
-          */
-         multipoint: function multipoint (multipoint$1) {
-           var this$1 = this;
+           function clickCancel() {
+             textSection.select('.field-url').property('value', _origSettings.url);
+             corePreferences('settings-custom-data-url', _origSettings.url);
+             this.blur();
+             modal.close();
+           } // accept the current url

 
 

-           var array = [];
-           for (var i = 0, len = multipoint$1._geometries.length; i < len; ++i) {
-             array.push('(' + extract$1.point.apply(this$1, [multipoint$1._geometries[i]]) + ')');
-           }
-           return array.join(',')
-         },

 
 

-         /**
-          * Return a comma delimited string of point coordinates from a line.
-          *
-          * @param {LineString} linestring
-          * @return {String} A string of point coordinate strings representing the linestring.
-          */
-         linestring: function linestring (linestring$1) {
-           var this$1 = this;
+           function clickSave() {
+             _currSettings.url = textSection.select('.field-url').property('value').trim(); // one or the other but not both

 
 

-           var array = [];
-           for (var i = 0, len = linestring$1._points._coordinates.length; i < len; ++i) {
-             array.push(extract$1.coordinate.apply(this$1, [linestring$1._points._coordinates[i]]));
-           }
-           return array.join(',')
-         },
+             if (_currSettings.url) {
+               _currSettings.fileList = null;
+             }

 
 

-         linearring: function linearring (linearring$1) {
-           var this$1 = this;
+             if (_currSettings.fileList) {
+               _currSettings.url = '';
+             }

 
 

-           var array = [];
-           for (var i = 0, len = linearring$1._points._coordinates.length; i < len; ++i) {
-             array.push(extract$1.coordinate.apply(this$1, [linearring$1._points._coordinates[i]]));
+             corePreferences('settings-custom-data-url', _currSettings.url);
+             this.blur();
+             modal.close();
+             dispatch.call('change', this, _currSettings);

            }
            }

-           return array.join(',')
-         },
+         }

 
 

-         /**
-          * Return a comma delimited string of linestring strings from a
-          * multilinestring.
-          *
-          * @param {MultiLineString} multilinestring
-          * @return {String} A string of of linestring strings representing the multilinestring.
-          */
-         multilinestring: function multilinestring (multilinestring$1) {
-           var this$1 = this;
+         return utilRebind(render, dispatch, 'on');
+       }

 
 

-           var array = [];
-           for (var i = 0, len = multilinestring$1._geometries.length; i < len; ++i) {
-             array.push('(' +
-               extract$1.linestring.apply(this$1, [multilinestring$1._geometries[i]]) +
-               ')');
-           }
-           return array.join(',')
-         },
+       function uiSectionDataLayers(context) {
+         var settingsCustomData = uiSettingsCustomData(context).on('change', customChanged);
+         var layers = context.layers();
+         var section = uiSection('data-layers', context).label(_t.html('map_data.data_layers')).disclosureContent(renderDisclosureContent);

 
 

-         /**
-          * Return a comma delimited string of linear ring arrays from a polygon.
-          *
-          * @param {Polygon} polygon
-          * @return {String} An array of linear ring arrays representing the polygon.
-          */
-         polygon: function polygon (polygon$1) {
-           var this$1 = this;
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.data-layer-container').data([0]);
+           container.enter().append('div').attr('class', 'data-layer-container').merge(container).call(drawOsmItems).call(drawQAItems).call(drawCustomDataItems).call(drawVectorItems) // Beta - Detroit mapping challenge
+           .call(drawPanelItems);
+         }

 
 

-           var array = [];
-           array.push('(' + extract$1.linestring.apply(this, [polygon$1._shell]) + ')');
-           for (var i = 0, len = polygon$1._holes.length; i < len; ++i) {
-             array.push('(' + extract$1.linestring.apply(this$1, [polygon$1._holes[i]]) + ')');
+         function showsLayer(which) {
+           var layer = layers.layer(which);
+
+           if (layer) {
+             return layer.enabled();

            }
            }

-           return array.join(',')
-         },

 
 

-         /**
-          * Return an array of polygon arrays from a multipolygon.
-          *
-          * @param {MultiPolygon} multipolygon
-          * @return {String} An array of polygon arrays representing the multipolygon.
-          */
-         multipolygon: function multipolygon (multipolygon$1) {
-           var this$1 = this;
+           return false;
+         }

 
 

-           var array = [];
-           for (var i = 0, len = multipolygon$1._geometries.length; i < len; ++i) {
-             array.push('(' + extract$1.polygon.apply(this$1, [multipolygon$1._geometries[i]]) + ')');
-           }
-           return array.join(',')
-         },
+         function setLayer(which, enabled) {
+           // Don't allow layer changes while drawing - #6584
+           var mode = context.mode();
+           if (mode && /^draw/.test(mode.id)) return;
+           var layer = layers.layer(which);

 
 

-         /**
-          * Return the WKT portion between 'GEOMETRYCOLLECTION(' and ')' for an
-          * geometrycollection.
-          *
-          * @param {GeometryCollection} collection
-          * @return {String} internal WKT representation of the collection.
-          */
-         geometrycollection: function geometrycollection (collection) {
-           var this$1 = this;
+           if (layer) {
+             layer.enabled(enabled);

 
 

-           var array = [];
-           for (var i = 0, len = collection._geometries.length; i < len; ++i) {
-             array.push(this$1.extractGeometry(collection._geometries[i]));
+             if (!enabled && (which === 'osm' || which === 'notes')) {
+               context.enter(modeBrowse(context));
+             }

            }
            }

-           return array.join(',')

          }
          }

-       };

 
 

-       /**
-        * Object with properties corresponding to the geometry types. Property values
-        * are functions that do the actual parsing.
-        * @private
-        */
-       var parse$1 = {
-         /**
-          * Return point geometry given a point WKT fragment.
-          *
-          * @param {String} str A WKT fragment representing the point.
-          * @return {Point} A point geometry.
-          * @private
-          */
-         point: function point (str) {
-           if (str === undefined) {
-             return this.geometryFactory.createPoint()
-           }
+         function toggleLayer(which) {
+           setLayer(which, !showsLayer(which));
+         }

 
 

-           var coords = str.trim().split(regExes.spaces);
-           return this.geometryFactory.createPoint(new Coordinate(Number.parseFloat(coords[0]),
-             Number.parseFloat(coords[1])))
-         },
+         function drawOsmItems(selection) {
+           var osmKeys = ['osm', 'notes'];
+           var osmLayers = layers.all().filter(function (obj) {
+             return osmKeys.indexOf(obj.id) !== -1;
+           });
+           var ul = selection.selectAll('.layer-list-osm').data([0]);
+           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-osm').merge(ul);
+           var li = ul.selectAll('.list-item').data(osmLayers);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', function (d) {
+             return 'list-item list-item-' + d.id;
+           });
+           var labelEnter = liEnter.append('label').each(function (d) {
+             if (d.id === 'osm') {
+               select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).keys([uiCmd('⌥' + _t('area_fill.wireframe.key'))]).placement('bottom'));
+             } else {
+               select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
+             }
+           });
+           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+             toggleLayer(d.id);
+           });
+           labelEnter.append('span').html(function (d) {
+             return _t.html('map_data.layers.' + d.id + '.title');
+           }); // Update
+
+           li.merge(liEnter).classed('active', function (d) {
+             return d.layer.enabled();
+           }).selectAll('input').property('checked', function (d) {
+             return d.layer.enabled();
+           });
+         }

 
 

-         /**
-          * Return a multipoint geometry given a multipoint WKT fragment.
-          *
-          * @param {String} str A WKT fragment representing the multipoint.
-          * @return {Point} A multipoint feature.
-          * @private
-          */
-         multipoint: function multipoint (str) {
-           var this$1 = this;
+         function drawQAItems(selection) {
+           var qaKeys = ['keepRight', 'improveOSM', 'osmose'];
+           var qaLayers = layers.all().filter(function (obj) {
+             return qaKeys.indexOf(obj.id) !== -1;
+           });
+           var ul = selection.selectAll('.layer-list-qa').data([0]);
+           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-qa').merge(ul);
+           var li = ul.selectAll('.list-item').data(qaLayers);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', function (d) {
+             return 'list-item list-item-' + d.id;
+           });
+           var labelEnter = liEnter.append('label').each(function (d) {
+             select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
+           });
+           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+             toggleLayer(d.id);
+           });
+           labelEnter.append('span').html(function (d) {
+             return _t.html('map_data.layers.' + d.id + '.title');
+           }); // Update
+
+           li.merge(liEnter).classed('active', function (d) {
+             return d.layer.enabled();
+           }).selectAll('input').property('checked', function (d) {
+             return d.layer.enabled();
+           });
+         } // Beta feature - sample vector layers to support Detroit Mapping Challenge
+         // https://github.com/osmus/detroit-mapping-challenge

 
 

-           if (str === undefined) {
-             return this.geometryFactory.createMultiPoint()
-           }

 
 

-           var point;
-           var points = str.trim().split(',');
-           var components = [];
-           for (var i = 0, len = points.length; i < len; ++i) {
-             point = points[i].replace(regExes.trimParens, '$1');
-             components.push(parse$1.point.apply(this$1, [point]));
-           }
-           return this.geometryFactory.createMultiPoint(components)
-         },
+         function drawVectorItems(selection) {
+           var dataLayer = layers.layer('data');
+           var vtData = [{
+             name: 'Detroit Neighborhoods/Parks',
+             src: 'neighborhoods-parks',
+             tooltip: 'Neighborhood boundaries and parks as compiled by City of Detroit in concert with community groups.',
+             template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmur6x34562qp9iv1u3ksf-54hev,jonahadkins.cjksmqxdx33jj2wp90xd9x2md-4e5y2/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+           }, {
+             name: 'Detroit Composite POIs',
+             src: 'composite-poi',
+             tooltip: 'Fire Inspections, Business Licenses, and other public location data collated from the City of Detroit.',
+             template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmm6a02sli31myxhsr7zf3-2sw8h/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+           }, {
+             name: 'Detroit All-The-Places POIs',
+             src: 'alltheplaces-poi',
+             tooltip: 'Public domain business location data created by web scrapers.',
+             template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmswgk340g2vo06p1w9w0j-8fjjc/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+           }]; // Only show this if the map is around Detroit..
+
+           var detroit = geoExtent([-83.5, 42.1], [-82.8, 42.5]);
+           var showVectorItems = context.map().zoom() > 9 && detroit.contains(context.map().center());
+           var container = selection.selectAll('.vectortile-container').data(showVectorItems ? [0] : []);
+           container.exit().remove();
+           var containerEnter = container.enter().append('div').attr('class', 'vectortile-container');
+           containerEnter.append('h4').attr('class', 'vectortile-header').html('Detroit Vector Tiles (Beta)');
+           containerEnter.append('ul').attr('class', 'layer-list layer-list-vectortile');
+           containerEnter.append('div').attr('class', 'vectortile-footer').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmus/detroit-mapping-challenge').append('span').html('About these layers');
+           container = container.merge(containerEnter);
+           var ul = container.selectAll('.layer-list-vectortile');
+           var li = ul.selectAll('.list-item').data(vtData);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', function (d) {
+             return 'list-item list-item-' + d.src;
+           });
+           var labelEnter = liEnter.append('label').each(function (d) {
+             select(this).call(uiTooltip().title(d.tooltip).placement('top'));
+           });
+           labelEnter.append('input').attr('type', 'radio').attr('name', 'vectortile').on('change', selectVTLayer);
+           labelEnter.append('span').html(function (d) {
+             return d.name;
+           }); // Update

 
 

-         /**
-          * Return a linestring geometry given a linestring WKT fragment.
-          *
-          * @param {String} str A WKT fragment representing the linestring.
-          * @return {LineString} A linestring geometry.
-          * @private
-          */
-         linestring: function linestring (str) {
-           if (str === undefined) {
-             return this.geometryFactory.createLineString()
-           }
+           li.merge(liEnter).classed('active', isVTLayerSelected).selectAll('input').property('checked', isVTLayerSelected);

 
 

-           var points = str.trim().split(',');
-           var components = [];
-           var coords;
-           for (var i = 0, len = points.length; i < len; ++i) {
-             coords = points[i].trim().split(regExes.spaces);
-             components.push(new Coordinate(Number.parseFloat(coords[0]), Number.parseFloat(coords[1])));
+           function isVTLayerSelected(d) {
+             return dataLayer && dataLayer.template() === d.template;

            }
            }

-           return this.geometryFactory.createLineString(components)
-         },

 
 

-         /**
-          * Return a linearring geometry given a linearring WKT fragment.
-          *
-          * @param {String} str A WKT fragment representing the linearring.
-          * @return {LinearRing} A linearring geometry.
-          * @private
-          */
-         linearring: function linearring (str) {
-           if (str === undefined) {
-             return this.geometryFactory.createLinearRing()
-           }
+           function selectVTLayer(d3_event, d) {
+             corePreferences('settings-custom-data-url', d.template);

 
 

-           var points = str.trim().split(',');
-           var components = [];
-           var coords;
-           for (var i = 0, len = points.length; i < len; ++i) {
-             coords = points[i].trim().split(regExes.spaces);
-             components.push(new Coordinate(Number.parseFloat(coords[0]), Number.parseFloat(coords[1])));
+             if (dataLayer) {
+               dataLayer.template(d.template, d.src);
+               dataLayer.enabled(true);
+             }

            }
            }

-           return this.geometryFactory.createLinearRing(components)
-         },
-
-         /**
-          * Return a multilinestring geometry given a multilinestring WKT fragment.
-          *
-          * @param {String} str A WKT fragment representing the multilinestring.
-          * @return {MultiLineString} A multilinestring geometry.
-          * @private
-          */
-         multilinestring: function multilinestring (str) {
-           var this$1 = this;
+         }

 
 

-           if (str === undefined) {
-             return this.geometryFactory.createMultiLineString()
-           }
+         function drawCustomDataItems(selection) {
+           var dataLayer = layers.layer('data');
+           var hasData = dataLayer && dataLayer.hasData();
+           var showsData = hasData && dataLayer.enabled();
+           var ul = selection.selectAll('.layer-list-data').data(dataLayer ? [0] : []); // Exit

 
 

-           var line;
-           var lines = str.trim().split(regExes.parenComma);
-           var components = [];
-           for (var i = 0, len = lines.length; i < len; ++i) {
-             line = lines[i].replace(regExes.trimParens, '$1');
-             components.push(parse$1.linestring.apply(this$1, [line]));
-           }
-           return this.geometryFactory.createMultiLineString(components)
-         },
+           ul.exit().remove(); // Enter

 
 

-         /**
-          * Return a polygon geometry given a polygon WKT fragment.
-          *
-          * @param {String} str A WKT fragment representing the polygon.
-          * @return {Polygon} A polygon geometry.
-          * @private
-          */
-         polygon: function polygon (str) {
-           var this$1 = this;
+           var ulEnter = ul.enter().append('ul').attr('class', 'layer-list layer-list-data');
+           var liEnter = ulEnter.append('li').attr('class', 'list-item-data');
+           var labelEnter = liEnter.append('label').call(uiTooltip().title(_t.html('map_data.layers.custom.tooltip')).placement('top'));
+           labelEnter.append('input').attr('type', 'checkbox').on('change', function () {
+             toggleLayer('data');
+           });
+           labelEnter.append('span').html(_t.html('map_data.layers.custom.title'));
+           liEnter.append('button').attr('class', 'open-data-options').call(uiTooltip().title(_t.html('settings.custom_data.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             editCustom();
+           }).call(svgIcon('#iD-icon-more'));
+           liEnter.append('button').attr('class', 'zoom-to-data').call(uiTooltip().title(_t.html('map_data.layers.custom.zoom')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+             if (select(this).classed('disabled')) return;
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+             dataLayer.fitZoom();
+           }).call(svgIcon('#iD-icon-framed-dot', 'monochrome')); // Update

 
 

-           if (str === undefined) {
-             return this.geometryFactory.createPolygon()
-           }
+           ul = ul.merge(ulEnter);
+           ul.selectAll('.list-item-data').classed('active', showsData).selectAll('label').classed('deemphasize', !hasData).selectAll('input').property('disabled', !hasData).property('checked', showsData);
+           ul.selectAll('button.zoom-to-data').classed('disabled', !hasData);
+         }

 
 

-           var ring, linestring, linearring;
-           var rings = str.trim().split(regExes.parenComma);
-           var shell;
-           var holes = [];
-           for (var i = 0, len = rings.length; i < len; ++i) {
-             ring = rings[i].replace(regExes.trimParens, '$1');
-             linestring = parse$1.linestring.apply(this$1, [ring]);
-             linearring = this$1.geometryFactory.createLinearRing(linestring._points);
-             if (i === 0) {
-               shell = linearring;
-             } else {
-               holes.push(linearring);
-             }
-           }
-           return this.geometryFactory.createPolygon(shell, holes)
-         },
+         function editCustom() {
+           context.container().call(settingsCustomData);
+         }

 
 

-         /**
-          * Return a multipolygon geometry given a multipolygon WKT fragment.
-          *
-          * @param {String} str A WKT fragment representing the multipolygon.
-          * @return {MultiPolygon} A multipolygon geometry.
-          * @private
-          */
-         multipolygon: function multipolygon (str) {
-           var this$1 = this;
+         function customChanged(d) {
+           var dataLayer = layers.layer('data');

 
 

-           if (str === undefined) {
-             return this.geometryFactory.createMultiPolygon()
+           if (d && d.url) {
+             dataLayer.url(d.url);
+           } else if (d && d.fileList) {
+             dataLayer.fileList(d.fileList);

            }
            }

+         }

 
 

-           var polygon;
-           var polygons = str.trim().split(regExes.doubleParenComma);
-           var components = [];
-           for (var i = 0, len = polygons.length; i < len; ++i) {
-             polygon = polygons[i].replace(regExes.trimParens, '$1');
-             components.push(parse$1.polygon.apply(this$1, [polygon]));
-           }
-           return this.geometryFactory.createMultiPolygon(components)
-         },
+         function drawPanelItems(selection) {
+           var panelsListEnter = selection.selectAll('.md-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list md-extras-list');
+           var historyPanelLabelEnter = panelsListEnter.append('li').attr('class', 'history-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.history_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.history.key'))]).placement('top'));
+           historyPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+             d3_event.preventDefault();
+             context.ui().info.toggle('history');
+           });
+           historyPanelLabelEnter.append('span').html(_t.html('map_data.history_panel.title'));
+           var measurementPanelLabelEnter = panelsListEnter.append('li').attr('class', 'measurement-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.measurement_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.measurement.key'))]).placement('top'));
+           measurementPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+             d3_event.preventDefault();
+             context.ui().info.toggle('measurement');
+           });
+           measurementPanelLabelEnter.append('span').html(_t.html('map_data.measurement_panel.title'));
+         }

 
 

-         /**
-          * Return a geometrycollection given a geometrycollection WKT fragment.
-          *
-          * @param {String} str A WKT fragment representing the geometrycollection.
-          * @return {GeometryCollection}
-          * @private
-          */
-         geometrycollection: function geometrycollection (str) {
-           var this$1 = this;
+         context.layers().on('change.uiSectionDataLayers', section.reRender);
+         context.map().on('move.uiSectionDataLayers', debounce(function () {
+           // Detroit layers may have moved in or out of view
+           window.requestIdleCallback(section.reRender);
+         }, 1000));
+         return section;
+       }

 
 

-           if (str === undefined) {
-             return this.geometryFactory.createGeometryCollection()
-           }
+       function uiSectionMapFeatures(context) {
+         var _features = context.features().keys();
+
+         var section = uiSection('map-features', context).label(_t.html('map_data.map_features')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.layer-feature-list-container').data([0]);
+           var containerEnter = container.enter().append('div').attr('class', 'layer-feature-list-container');
+           containerEnter.append('ul').attr('class', 'layer-list layer-feature-list');
+           var footer = containerEnter.append('div').attr('class', 'feature-list-links section-footer');
+           footer.append('a').attr('class', 'feature-list-link').attr('href', '#').html(_t.html('issues.disable_all')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             context.features().disableAll();
+           });
+           footer.append('a').attr('class', 'feature-list-link').attr('href', '#').html(_t.html('issues.enable_all')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             context.features().enableAll();
+           }); // Update

 
 

-           // separate components of the collection with |
-           str = str.replace(/,\s*([A-Za-z])/g, '|$1');
-           var wktArray = str.trim().split('|');
-           var components = [];
-           for (var i = 0, len = wktArray.length; i < len; ++i) {
-             components.push(this$1.read(wktArray[i]));
-           }
-           return this.geometryFactory.createGeometryCollection(components)
+           container = container.merge(containerEnter);
+           container.selectAll('.layer-feature-list').call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);

          }
          }

-       };

 
 

-       /**
-        * Writes the Well-Known Text representation of a {@link Geometry}. The
-        * Well-Known Text format is defined in the <A
-        * HREF="http://www.opengis.org/techno/specs.htm"> OGC Simple Features
-        * Specification for SQL</A>.
-        * <p>
-        * The <code>WKTWriter</code> outputs coordinates rounded to the precision
-        * model. Only the maximum number of decimal places necessary to represent the
-        * ordinates to the required precision will be output.
-        * <p>
-        * The SFS WKT spec does not define a special tag for {@link LinearRing}s.
-        * Under the spec, rings are output as <code>LINESTRING</code>s.
-        */
+         function drawListItems(selection, data, type, name, change, active) {
+           var items = selection.selectAll('li').data(data); // Exit

 
 

-       /**
-        * @param {GeometryFactory} geometryFactory
-        * @constructor
-        */
-       var WKTWriter = function WKTWriter (geometryFactory) {
-         this.parser = new WKTParser(geometryFactory);
-       };
+           items.exit().remove(); // Enter

 
 

-       /**
-        * Converts a <code>Geometry</code> to its Well-known Text representation.
-        *
-        * @param {Geometry} geometry a <code>Geometry</code> to process.
-        * @return {string} a <Geometry Tagged Text> string (see the OpenGIS Simple
-        *       Features Specification).
-        * @memberof WKTWriter
-        */
-       WKTWriter.prototype.write = function write (geometry) {
-         return this.parser.write(geometry)
-       };
-       /**
-        * Generates the WKT for a <tt>LINESTRING</tt> specified by two
-        * {@link Coordinate}s.
-        *
-        * @param p0 the first coordinate.
-        * @param p1 the second coordinate.
-        *
-        * @return the WKT.
-        * @private
-        */
-       WKTWriter.toLineString = function toLineString (p0, p1) {
-         if (arguments.length !== 2) {
-           throw new Error('Not implemented')
-         }
-         return 'LINESTRING ( ' + p0.x + ' ' + p0.y + ', ' + p1.x + ' ' + p1.y + ' )'
-       };
+           var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
+             var tip = _t.html(name + '.' + d + '.tooltip');

 
 

-       var RuntimeException = (function (Error) {
-         function RuntimeException (message) {
-           Error.call(this, message);
-           this.name = 'RuntimeException';
-           this.message = message;
-           this.stack = (new Error()).stack;
+             if (autoHiddenFeature(d)) {
+               var msg = showsLayer('osm') ? _t.html('map_data.autohidden') : _t.html('map_data.osmhidden');
+               tip += '<div>' + msg + '</div>';
+             }
+
+             return tip;
+           }).placement('top'));
+           var label = enter.append('label');
+           label.append('input').attr('type', type).attr('name', name).on('change', change);
+           label.append('span').html(function (d) {
+             return _t.html(name + '.' + d + '.description');
+           }); // Update
+
+           items = items.merge(enter);
+           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', autoHiddenFeature);

          }
 
          }
 

-         if ( Error ) { RuntimeException.__proto__ = Error; }
-         RuntimeException.prototype = Object.create( Error && Error.prototype );
-         RuntimeException.prototype.constructor = RuntimeException;
+         function autoHiddenFeature(d) {
+           return context.features().autoHidden(d);
+         }

 
 

-         return RuntimeException;
-       }(Error));
+         function showsFeature(d) {
+           return context.features().enabled(d);
+         }

 
 

-       var AssertionFailedException = (function (RuntimeException$$1) {
-         function AssertionFailedException () {
-           RuntimeException$$1.call(this);
-           if (arguments.length === 0) {
-             RuntimeException$$1.call(this);
-           } else if (arguments.length === 1) {
-             var message = arguments[0];
-             RuntimeException$$1.call(this, message);
-           }
+         function clickFeature(d3_event, d) {
+           context.features().toggle(d);

          }
 
          }
 

-         if ( RuntimeException$$1 ) { AssertionFailedException.__proto__ = RuntimeException$$1; }
-         AssertionFailedException.prototype = Object.create( RuntimeException$$1 && RuntimeException$$1.prototype );
-         AssertionFailedException.prototype.constructor = AssertionFailedException;
-         AssertionFailedException.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         AssertionFailedException.prototype.getClass = function getClass () {
-           return AssertionFailedException
-         };
+         function showsLayer(id) {
+           var layer = context.layers().layer(id);
+           return layer && layer.enabled();
+         } // add listeners

 
 

-         return AssertionFailedException;
-       }(RuntimeException));

 
 

-       var Assert = function Assert () {};
+         context.features().on('change.map_features', section.reRender);
+         return section;
+       }

 
 

-       Assert.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Assert.prototype.getClass = function getClass () {
-         return Assert
-       };
-       Assert.shouldNeverReachHere = function shouldNeverReachHere () {
-         if (arguments.length === 0) {
-           Assert.shouldNeverReachHere(null);
-         } else if (arguments.length === 1) {
-           var message = arguments[0];
-           throw new AssertionFailedException('Should never reach here' + (message !== null ? ': ' + message : ''))
-         }
-       };
-       Assert.isTrue = function isTrue () {
-         var assertion;
-         var message;
-         if (arguments.length === 1) {
-           assertion = arguments[0];
-           Assert.isTrue(assertion, null);
-         } else if (arguments.length === 2) {
-           assertion = arguments[0];
-           message = arguments[1];
-           if (!assertion) {
-             if (message === null) {
-               throw new AssertionFailedException()
-             } else {
-               throw new AssertionFailedException(message)
-             }
-           }
-         }
-       };
-       Assert.equals = function equals () {
-         var expectedValue;
-         var actualValue;
-         var message;
-         if (arguments.length === 2) {
-           expectedValue = arguments[0];
-           actualValue = arguments[1];
-           Assert.equals(expectedValue, actualValue, null);
-         } else if (arguments.length === 3) {
-           expectedValue = arguments[0];
-           actualValue = arguments[1];
-           message = arguments[2];
-           if (!actualValue.equals(expectedValue)) {
-             throw new AssertionFailedException('Expected ' + expectedValue + ' but encountered ' + actualValue + (message !== null ? ': ' + message : ''))
-           }
+       function uiSectionMapStyleOptions(context) {
+         var section = uiSection('fill-area', context).label(_t.html('map_data.style_options')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.layer-fill-list').data([0]);
+           container.enter().append('ul').attr('class', 'layer-list layer-fill-list').merge(container).call(drawListItems, context.map().areaFillOptions, 'radio', 'area_fill', setFill, isActiveFill);
+           var container2 = selection.selectAll('.layer-visual-diff-list').data([0]);
+           container2.enter().append('ul').attr('class', 'layer-list layer-visual-diff-list').merge(container2).call(drawListItems, ['highlight_edits'], 'checkbox', 'visual_diff', toggleHighlightEdited, function () {
+             return context.surface().classed('highlight-edited');
+           });

          }
          }

-       };

 
 

-       var LineIntersector = function LineIntersector () {
-         this._result = null;
-         this._inputLines = Array(2).fill().map(function () { return Array(2); });
-         this._intPt = new Array(2).fill(null);
-         this._intLineIndex = null;
-         this._isProper = null;
-         this._pa = null;
-         this._pb = null;
-         this._precisionModel = null;
-         this._intPt[0] = new Coordinate();
-         this._intPt[1] = new Coordinate();
-         this._pa = this._intPt[0];
-         this._pb = this._intPt[1];
-         this._result = 0;
-       };
+         function drawListItems(selection, data, type, name, change, active) {
+           var items = selection.selectAll('li').data(data); // Exit

 
 

-       var staticAccessors$10 = { DONT_INTERSECT: { configurable: true },DO_INTERSECT: { configurable: true },COLLINEAR: { configurable: true },NO_INTERSECTION: { configurable: true },POINT_INTERSECTION: { configurable: true },COLLINEAR_INTERSECTION: { configurable: true } };
-       LineIntersector.prototype.getIndexAlongSegment = function getIndexAlongSegment (segmentIndex, intIndex) {
-         this.computeIntLineIndex();
-         return this._intLineIndex[segmentIndex][intIndex]
-       };
-       LineIntersector.prototype.getTopologySummary = function getTopologySummary () {
-         var catBuf = new StringBuffer();
-         if (this.isEndPoint()) { catBuf.append(' endpoint'); }
-         if (this._isProper) { catBuf.append(' proper'); }
-         if (this.isCollinear()) { catBuf.append(' collinear'); }
-         return catBuf.toString()
-       };
-       LineIntersector.prototype.computeIntersection = function computeIntersection (p1, p2, p3, p4) {
-         this._inputLines[0][0] = p1;
-         this._inputLines[0][1] = p2;
-         this._inputLines[1][0] = p3;
-         this._inputLines[1][1] = p4;
-         this._result = this.computeIntersect(p1, p2, p3, p4);
-       };
-       LineIntersector.prototype.getIntersectionNum = function getIntersectionNum () {
-         return this._result
-       };
-       LineIntersector.prototype.computeIntLineIndex = function computeIntLineIndex () {
-         if (arguments.length === 0) {
-           if (this._intLineIndex === null) {
-             this._intLineIndex = Array(2).fill().map(function () { return Array(2); });
-             this.computeIntLineIndex(0);
-             this.computeIntLineIndex(1);
-           }
-         } else if (arguments.length === 1) {
-           var segmentIndex = arguments[0];
-           var dist0 = this.getEdgeDistance(segmentIndex, 0);
-           var dist1 = this.getEdgeDistance(segmentIndex, 1);
-           if (dist0 > dist1) {
-             this._intLineIndex[segmentIndex][0] = 0;
-             this._intLineIndex[segmentIndex][1] = 1;
-           } else {
-             this._intLineIndex[segmentIndex][0] = 1;
-             this._intLineIndex[segmentIndex][1] = 0;
-           }
+           items.exit().remove(); // Enter
+
+           var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
+             return _t.html(name + '.' + d + '.tooltip');
+           }).keys(function (d) {
+             var key = d === 'wireframe' ? _t('area_fill.wireframe.key') : null;
+             if (d === 'highlight_edits') key = _t('map_data.highlight_edits.key');
+             return key ? [key] : null;
+           }).placement('top'));
+           var label = enter.append('label');
+           label.append('input').attr('type', type).attr('name', name).on('change', change);
+           label.append('span').html(function (d) {
+             return _t.html(name + '.' + d + '.description');
+           }); // Update
+
+           items = items.merge(enter);
+           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false);

          }
          }

-       };
-       LineIntersector.prototype.isProper = function isProper () {
-         return this.hasIntersection() && this._isProper
-       };
-       LineIntersector.prototype.setPrecisionModel = function setPrecisionModel (precisionModel) {
-         this._precisionModel = precisionModel;
-       };
-       LineIntersector.prototype.isInteriorIntersection = function isInteriorIntersection () {
-           var this$1 = this;

 
 

-         if (arguments.length === 0) {
-           if (this.isInteriorIntersection(0)) { return true }
-           if (this.isInteriorIntersection(1)) { return true }
-           return false
-         } else if (arguments.length === 1) {
-           var inputLineIndex = arguments[0];
-           for (var i = 0; i < this._result; i++) {
-             if (!(this$1._intPt[i].equals2D(this$1._inputLines[inputLineIndex][0]) || this$1._intPt[i].equals2D(this$1._inputLines[inputLineIndex][1]))) {
-               return true
-             }
-           }
-           return false
+         function isActiveFill(d) {
+           return context.map().activeAreaFill() === d;

          }
          }

-       };
-       LineIntersector.prototype.getIntersection = function getIntersection (intIndex) {
-         return this._intPt[intIndex]
-       };
-       LineIntersector.prototype.isEndPoint = function isEndPoint () {
-         return this.hasIntersection() && !this._isProper
-       };
-       LineIntersector.prototype.hasIntersection = function hasIntersection () {
-         return this._result !== LineIntersector.NO_INTERSECTION
-       };
-       LineIntersector.prototype.getEdgeDistance = function getEdgeDistance (segmentIndex, intIndex) {
-         var dist = LineIntersector.computeEdgeDistance(this._intPt[intIndex], this._inputLines[segmentIndex][0], this._inputLines[segmentIndex][1]);
-         return dist
-       };
-       LineIntersector.prototype.isCollinear = function isCollinear () {
-         return this._result === LineIntersector.COLLINEAR_INTERSECTION
-       };
-       LineIntersector.prototype.toString = function toString () {
-         return WKTWriter.toLineString(this._inputLines[0][0], this._inputLines[0][1]) + ' - ' + WKTWriter.toLineString(this._inputLines[1][0], this._inputLines[1][1]) + this.getTopologySummary()
-       };
-       LineIntersector.prototype.getEndpoint = function getEndpoint (segmentIndex, ptIndex) {
-         return this._inputLines[segmentIndex][ptIndex]
-       };
-       LineIntersector.prototype.isIntersection = function isIntersection (pt) {
-           var this$1 = this;

 
 

-         for (var i = 0; i < this._result; i++) {
-           if (this$1._intPt[i].equals2D(pt)) {
-             return true
-           }
+         function toggleHighlightEdited(d3_event) {
+           d3_event.preventDefault();
+           context.map().toggleHighlightEdited();

          }
          }

-         return false
-       };
-       LineIntersector.prototype.getIntersectionAlongSegment = function getIntersectionAlongSegment (segmentIndex, intIndex) {
-         this.computeIntLineIndex();
-         return this._intPt[this._intLineIndex[segmentIndex][intIndex]]
-       };
-       LineIntersector.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       LineIntersector.prototype.getClass = function getClass () {
-         return LineIntersector
-       };
-       LineIntersector.computeEdgeDistance = function computeEdgeDistance (p, p0, p1) {
-         var dx = Math.abs(p1.x - p0.x);
-         var dy = Math.abs(p1.y - p0.y);
-         var dist = -1.0;
-         if (p.equals(p0)) {
-           dist = 0.0;
-         } else if (p.equals(p1)) {
-           if (dx > dy) { dist = dx; } else { dist = dy; }
-         } else {
-           var pdx = Math.abs(p.x - p0.x);
-           var pdy = Math.abs(p.y - p0.y);
-           if (dx > dy) { dist = pdx; } else { dist = pdy; }
-           if (dist === 0.0 && !p.equals(p0)) {
-             dist = Math.max(pdx, pdy);
-           }
+
+         function setFill(d3_event, d) {
+           context.map().activeAreaFill(d);

          }
          }

-         Assert.isTrue(!(dist === 0.0 && !p.equals(p0)), 'Bad distance calculation');
-         return dist
-       };
-       LineIntersector.nonRobustComputeEdgeDistance = function nonRobustComputeEdgeDistance (p, p1, p2) {
-         var dx = p.x - p1.x;
-         var dy = p.y - p1.y;
-         var dist = Math.sqrt(dx * dx + dy * dy);
-         Assert.isTrue(!(dist === 0.0 && !p.equals(p1)), 'Invalid distance calculation');
-         return dist
-       };
-       staticAccessors$10.DONT_INTERSECT.get = function () { return 0 };
-       staticAccessors$10.DO_INTERSECT.get = function () { return 1 };
-       staticAccessors$10.COLLINEAR.get = function () { return 2 };
-       staticAccessors$10.NO_INTERSECTION.get = function () { return 0 };
-       staticAccessors$10.POINT_INTERSECTION.get = function () { return 1 };
-       staticAccessors$10.COLLINEAR_INTERSECTION.get = function () { return 2 };
-
-       Object.defineProperties( LineIntersector, staticAccessors$10 );
-
-       var RobustLineIntersector = (function (LineIntersector$$1) {
-         function RobustLineIntersector () {
-           LineIntersector$$1.apply(this, arguments);
-         }
-
-         if ( LineIntersector$$1 ) { RobustLineIntersector.__proto__ = LineIntersector$$1; }
-         RobustLineIntersector.prototype = Object.create( LineIntersector$$1 && LineIntersector$$1.prototype );
-         RobustLineIntersector.prototype.constructor = RobustLineIntersector;
-
-         RobustLineIntersector.prototype.isInSegmentEnvelopes = function isInSegmentEnvelopes (intPt) {
-           var env0 = new Envelope(this._inputLines[0][0], this._inputLines[0][1]);
-           var env1 = new Envelope(this._inputLines[1][0], this._inputLines[1][1]);
-           return env0.contains(intPt) && env1.contains(intPt)
-         };
-         RobustLineIntersector.prototype.computeIntersection = function computeIntersection () {
-           if (arguments.length === 3) {
-             var p = arguments[0];
-             var p1 = arguments[1];
-             var p2 = arguments[2];
-             this._isProper = false;
-             if (Envelope.intersects(p1, p2, p)) {
-               if (CGAlgorithms.orientationIndex(p1, p2, p) === 0 && CGAlgorithms.orientationIndex(p2, p1, p) === 0) {
-                 this._isProper = true;
-                 if (p.equals(p1) || p.equals(p2)) {
-                   this._isProper = false;
-                 }
-                 this._result = LineIntersector$$1.POINT_INTERSECTION;
-                 return null
-               }
-             }
-             this._result = LineIntersector$$1.NO_INTERSECTION;
-           } else { return LineIntersector$$1.prototype.computeIntersection.apply(this, arguments) }
-         };
-         RobustLineIntersector.prototype.normalizeToMinimum = function normalizeToMinimum (n1, n2, n3, n4, normPt) {
-           normPt.x = this.smallestInAbsValue(n1.x, n2.x, n3.x, n4.x);
-           normPt.y = this.smallestInAbsValue(n1.y, n2.y, n3.y, n4.y);
-           n1.x -= normPt.x;
-           n1.y -= normPt.y;
-           n2.x -= normPt.x;
-           n2.y -= normPt.y;
-           n3.x -= normPt.x;
-           n3.y -= normPt.y;
-           n4.x -= normPt.x;
-           n4.y -= normPt.y;
-         };
-         RobustLineIntersector.prototype.safeHCoordinateIntersection = function safeHCoordinateIntersection (p1, p2, q1, q2) {
-           var intPt = null;
-           try {
-             intPt = HCoordinate.intersection(p1, p2, q1, q2);
-           } catch (e) {
-             if (e instanceof NotRepresentableException) {
-               intPt = RobustLineIntersector.nearestEndpoint(p1, p2, q1, q2);
-             } else { throw e }
-           } finally {}
-           return intPt
-         };
-         RobustLineIntersector.prototype.intersection = function intersection (p1, p2, q1, q2) {
-           var intPt = this.intersectionWithNormalization(p1, p2, q1, q2);
-           if (!this.isInSegmentEnvelopes(intPt)) {
-             intPt = new Coordinate(RobustLineIntersector.nearestEndpoint(p1, p2, q1, q2));
-           }
-           if (this._precisionModel !== null) {
-             this._precisionModel.makePrecise(intPt);
-           }
-           return intPt
-         };
-         RobustLineIntersector.prototype.smallestInAbsValue = function smallestInAbsValue (x1, x2, x3, x4) {
-           var x = x1;
-           var xabs = Math.abs(x);
-           if (Math.abs(x2) < xabs) {
-             x = x2;
-             xabs = Math.abs(x2);
-           }
-           if (Math.abs(x3) < xabs) {
-             x = x3;
-             xabs = Math.abs(x3);
-           }
-           if (Math.abs(x4) < xabs) {
-             x = x4;
-           }
-           return x
-         };
-         RobustLineIntersector.prototype.checkDD = function checkDD (p1, p2, q1, q2, intPt) {
-           var intPtDD = CGAlgorithmsDD.intersection(p1, p2, q1, q2);
-           var isIn = this.isInSegmentEnvelopes(intPtDD);
-           System.out.println('DD in env = ' + isIn + '  --------------------- ' + intPtDD);
-           if (intPt.distance(intPtDD) > 0.0001) {
-             System.out.println('Distance = ' + intPt.distance(intPtDD));
-           }
-         };
-         RobustLineIntersector.prototype.intersectionWithNormalization = function intersectionWithNormalization (p1, p2, q1, q2) {
-           var n1 = new Coordinate(p1);
-           var n2 = new Coordinate(p2);
-           var n3 = new Coordinate(q1);
-           var n4 = new Coordinate(q2);
-           var normPt = new Coordinate();
-           this.normalizeToEnvCentre(n1, n2, n3, n4, normPt);
-           var intPt = this.safeHCoordinateIntersection(n1, n2, n3, n4);
-           intPt.x += normPt.x;
-           intPt.y += normPt.y;
-           return intPt
-         };
-         RobustLineIntersector.prototype.computeCollinearIntersection = function computeCollinearIntersection (p1, p2, q1, q2) {
-           var p1q1p2 = Envelope.intersects(p1, p2, q1);
-           var p1q2p2 = Envelope.intersects(p1, p2, q2);
-           var q1p1q2 = Envelope.intersects(q1, q2, p1);
-           var q1p2q2 = Envelope.intersects(q1, q2, p2);
-           if (p1q1p2 && p1q2p2) {
-             this._intPt[0] = q1;
-             this._intPt[1] = q2;
-             return LineIntersector$$1.COLLINEAR_INTERSECTION
-           }
-           if (q1p1q2 && q1p2q2) {
-             this._intPt[0] = p1;
-             this._intPt[1] = p2;
-             return LineIntersector$$1.COLLINEAR_INTERSECTION
-           }
-           if (p1q1p2 && q1p1q2) {
-             this._intPt[0] = q1;
-             this._intPt[1] = p1;
-             return q1.equals(p1) && !p1q2p2 && !q1p2q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-           }
-           if (p1q1p2 && q1p2q2) {
-             this._intPt[0] = q1;
-             this._intPt[1] = p2;
-             return q1.equals(p2) && !p1q2p2 && !q1p1q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-           }
-           if (p1q2p2 && q1p1q2) {
-             this._intPt[0] = q2;
-             this._intPt[1] = p1;
-             return q2.equals(p1) && !p1q1p2 && !q1p2q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-           }
-           if (p1q2p2 && q1p2q2) {
-             this._intPt[0] = q2;
-             this._intPt[1] = p2;
-             return q2.equals(p2) && !p1q1p2 && !q1p1q2 ? LineIntersector$$1.POINT_INTERSECTION : LineIntersector$$1.COLLINEAR_INTERSECTION
-           }
-           return LineIntersector$$1.NO_INTERSECTION
-         };
-         RobustLineIntersector.prototype.normalizeToEnvCentre = function normalizeToEnvCentre (n00, n01, n10, n11, normPt) {
-           var minX0 = n00.x < n01.x ? n00.x : n01.x;
-           var minY0 = n00.y < n01.y ? n00.y : n01.y;
-           var maxX0 = n00.x > n01.x ? n00.x : n01.x;
-           var maxY0 = n00.y > n01.y ? n00.y : n01.y;
-           var minX1 = n10.x < n11.x ? n10.x : n11.x;
-           var minY1 = n10.y < n11.y ? n10.y : n11.y;
-           var maxX1 = n10.x > n11.x ? n10.x : n11.x;
-           var maxY1 = n10.y > n11.y ? n10.y : n11.y;
-           var intMinX = minX0 > minX1 ? minX0 : minX1;
-           var intMaxX = maxX0 < maxX1 ? maxX0 : maxX1;
-           var intMinY = minY0 > minY1 ? minY0 : minY1;
-           var intMaxY = maxY0 < maxY1 ? maxY0 : maxY1;
-           var intMidX = (intMinX + intMaxX) / 2.0;
-           var intMidY = (intMinY + intMaxY) / 2.0;
-           normPt.x = intMidX;
-           normPt.y = intMidY;
-           n00.x -= normPt.x;
-           n00.y -= normPt.y;
-           n01.x -= normPt.x;
-           n01.y -= normPt.y;
-           n10.x -= normPt.x;
-           n10.y -= normPt.y;
-           n11.x -= normPt.x;
-           n11.y -= normPt.y;
-         };
-         RobustLineIntersector.prototype.computeIntersect = function computeIntersect (p1, p2, q1, q2) {
-           this._isProper = false;
-           if (!Envelope.intersects(p1, p2, q1, q2)) { return LineIntersector$$1.NO_INTERSECTION }
-           var Pq1 = CGAlgorithms.orientationIndex(p1, p2, q1);
-           var Pq2 = CGAlgorithms.orientationIndex(p1, p2, q2);
-           if ((Pq1 > 0 && Pq2 > 0) || (Pq1 < 0 && Pq2 < 0)) {
-             return LineIntersector$$1.NO_INTERSECTION
-           }
-           var Qp1 = CGAlgorithms.orientationIndex(q1, q2, p1);
-           var Qp2 = CGAlgorithms.orientationIndex(q1, q2, p2);
-           if ((Qp1 > 0 && Qp2 > 0) || (Qp1 < 0 && Qp2 < 0)) {
-             return LineIntersector$$1.NO_INTERSECTION
-           }
-           var collinear = Pq1 === 0 && Pq2 === 0 && Qp1 === 0 && Qp2 === 0;
-           if (collinear) {
-             return this.computeCollinearIntersection(p1, p2, q1, q2)
-           }
-           if (Pq1 === 0 || Pq2 === 0 || Qp1 === 0 || Qp2 === 0) {
-             this._isProper = false;
-             if (p1.equals2D(q1) || p1.equals2D(q2)) {
-               this._intPt[0] = p1;
-             } else if (p2.equals2D(q1) || p2.equals2D(q2)) {
-               this._intPt[0] = p2;
-             } else if (Pq1 === 0) {
-               this._intPt[0] = new Coordinate(q1);
-             } else if (Pq2 === 0) {
-               this._intPt[0] = new Coordinate(q2);
-             } else if (Qp1 === 0) {
-               this._intPt[0] = new Coordinate(p1);
-             } else if (Qp2 === 0) {
-               this._intPt[0] = new Coordinate(p2);
-             }
-           } else {
-             this._isProper = true;
-             this._intPt[0] = this.intersection(p1, p2, q1, q2);
-           }
-           return LineIntersector$$1.POINT_INTERSECTION
-         };
-         RobustLineIntersector.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         RobustLineIntersector.prototype.getClass = function getClass () {
-           return RobustLineIntersector
-         };
-         RobustLineIntersector.nearestEndpoint = function nearestEndpoint (p1, p2, q1, q2) {
-           var nearestPt = p1;
-           var minDist = CGAlgorithms.distancePointLine(p1, q1, q2);
-           var dist = CGAlgorithms.distancePointLine(p2, q1, q2);
-           if (dist < minDist) {
-             minDist = dist;
-             nearestPt = p2;
-           }
-           dist = CGAlgorithms.distancePointLine(q1, p1, p2);
-           if (dist < minDist) {
-             minDist = dist;
-             nearestPt = q1;
-           }
-           dist = CGAlgorithms.distancePointLine(q2, p1, p2);
-           if (dist < minDist) {
-             minDist = dist;
-             nearestPt = q2;
-           }
-           return nearestPt
-         };

 
 

-         return RobustLineIntersector;
-       }(LineIntersector));
+         context.map().on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
+         return section;
+       }

 
 

-       var RobustDeterminant = function RobustDeterminant () {};
+       function uiSectionPhotoOverlays(context) {
+         var layers = context.layers();
+         var section = uiSection('photo-overlays', context).label(_t.html('photo_overlays.title')).disclosureContent(renderDisclosureContent).expandedByDefault(false);

 
 

-       RobustDeterminant.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       RobustDeterminant.prototype.getClass = function getClass () {
-         return RobustDeterminant
-       };
-       RobustDeterminant.orientationIndex = function orientationIndex (p1, p2, q) {
-         var dx1 = p2.x - p1.x;
-         var dy1 = p2.y - p1.y;
-         var dx2 = q.x - p2.x;
-         var dy2 = q.y - p2.y;
-         return RobustDeterminant.signOfDet2x2(dx1, dy1, dx2, dy2)
-       };
-       RobustDeterminant.signOfDet2x2 = function signOfDet2x2 (x1, y1, x2, y2) {
-         var sign = null;
-         var swap = null;
-         var k = null;
-         sign = 1;
-         if (x1 === 0.0 || y2 === 0.0) {
-           if (y1 === 0.0 || x2 === 0.0) {
-             return 0
-           } else if (y1 > 0) {
-             if (x2 > 0) {
-               return -sign
-             } else {
-               return sign
-             }
-           } else {
-             if (x2 > 0) {
-               return sign
-             } else {
-               return -sign
-             }
-           }
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.photo-overlay-container').data([0]);
+           container.enter().append('div').attr('class', 'photo-overlay-container').merge(container).call(drawPhotoItems).call(drawPhotoTypeItems).call(drawDateFilter).call(drawUsernameFilter);

          }
          }

-         if (y1 === 0.0 || x2 === 0.0) {
-           if (y2 > 0) {
-             if (x1 > 0) {
-               return sign
-             } else {
-               return -sign
-             }
-           } else {
-             if (x1 > 0) {
-               return -sign
-             } else {
-               return sign
-             }
-           }
-         }
-         if (y1 > 0.0) {
-           if (y2 > 0.0) {
-             if (y1 <= y2) ; else {
-               sign = -sign;
-               swap = x1;
-               x1 = x2;
-               x2 = swap;
-               swap = y1;
-               y1 = y2;
-               y2 = swap;
-             }
-           } else {
-             if (y1 <= -y2) {
-               sign = -sign;
-               x2 = -x2;
-               y2 = -y2;
-             } else {
-               swap = x1;
-               x1 = -x2;
-               x2 = swap;
-               swap = y1;
-               y1 = -y2;
-               y2 = swap;
-             }
-           }
-         } else {
-           if (y2 > 0.0) {
-             if (-y1 <= y2) {
-               sign = -sign;
-               x1 = -x1;
-               y1 = -y1;
-             } else {
-               swap = -x1;
-               x1 = x2;
-               x2 = swap;
-               swap = -y1;
-               y1 = y2;
-               y2 = swap;
-             }
-           } else {
-             if (y1 >= y2) {
-               x1 = -x1;
-               y1 = -y1;
-               x2 = -x2;
-               y2 = -y2;
-             } else {
-               sign = -sign;
-               swap = -x1;
-               x1 = -x2;
-               x2 = swap;
-               swap = -y1;
-               y1 = -y2;
-               y2 = swap;
-             }
+
+         function drawPhotoItems(selection) {
+           var photoKeys = context.photos().overlayLayerIDs();
+           var photoLayers = layers.all().filter(function (obj) {
+             return photoKeys.indexOf(obj.id) !== -1;
+           });
+           var data = photoLayers.filter(function (obj) {
+             return obj.layer.supported();
+           });
+
+           function layerSupported(d) {
+             return d.layer && d.layer.supported();

            }
            }

-         }
-         if (x1 > 0.0) {
-           if (x2 > 0.0) {
-             if (x1 <= x2) ; else {
-               return sign
-             }
-           } else {
-             return sign
+
+           function layerEnabled(d) {
+             return layerSupported(d) && d.layer.enabled();

            }
            }

-         } else {
-           if (x2 > 0.0) {
-             return -sign
-           } else {
-             if (x1 >= x2) {
-               sign = -sign;
-               x1 = -x1;
-               x2 = -x2;
-             } else {
-               return -sign
+
+           var ul = selection.selectAll('.layer-list-photos').data([0]);
+           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photos').merge(ul);
+           var li = ul.selectAll('.list-item-photos').data(data);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', function (d) {
+             var classes = 'list-item-photos list-item-' + d.id;
+
+             if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
+               classes += ' indented';

              }
              }

-           }
+
+             return classes;
+           });
+           var labelEnter = liEnter.append('label').each(function (d) {
+             var titleID;
+             if (d.id === 'mapillary-signs') titleID = 'mapillary.signs.tooltip';else if (d.id === 'mapillary') titleID = 'mapillary_images.tooltip';else if (d.id === 'openstreetcam') titleID = 'openstreetcam_images.tooltip';else titleID = d.id.replace(/-/g, '_') + '.tooltip';
+             select(this).call(uiTooltip().title(_t.html(titleID)).placement('top'));
+           });
+           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+             toggleLayer(d.id);
+           });
+           labelEnter.append('span').html(function (d) {
+             var id = d.id;
+             if (id === 'mapillary-signs') id = 'photo_overlays.traffic_signs';
+             return _t.html(id.replace(/-/g, '_') + '.title');
+           }); // Update
+
+           li.merge(liEnter).classed('active', layerEnabled).selectAll('input').property('checked', layerEnabled);

          }
          }

-         while (true) {
-           k = Math.floor(x2 / x1);
-           x2 = x2 - k * x1;
-           y2 = y2 - k * y1;
-           if (y2 < 0.0) {
-             return -sign
-           }
-           if (y2 > y1) {
-             return sign
-           }
-           if (x1 > x2 + x2) {
-             if (y1 < y2 + y2) {
-               return sign
-             }
-           } else {
-             if (y1 > y2 + y2) {
-               return -sign
-             } else {
-               x2 = x1 - x2;
-               y2 = y1 - y2;
-               sign = -sign;
-             }
-           }
-           if (y2 === 0.0) {
-             if (x2 === 0.0) {
-               return 0
-             } else {
-               return -sign
-             }
-           }
-           if (x2 === 0.0) {
-             return sign
-           }
-           k = Math.floor(x1 / x2);
-           x1 = x1 - k * x2;
-           y1 = y1 - k * y2;
-           if (y1 < 0.0) {
-             return sign
-           }
-           if (y1 > y2) {
-             return -sign
-           }
-           if (x2 > x1 + x1) {
-             if (y2 < y1 + y1) {
-               return -sign
-             }
-           } else {
-             if (y2 > y1 + y1) {
-               return sign
-             } else {
-               x1 = x2 - x1;
-               y1 = y2 - y1;
-               sign = -sign;
-             }
-           }
-           if (y1 === 0.0) {
-             if (x1 === 0.0) {
-               return 0
-             } else {
-               return sign
-             }
-           }
-           if (x1 === 0.0) {
-             return -sign
+
+         function drawPhotoTypeItems(selection) {
+           var data = context.photos().allPhotoTypes();
+
+           function typeEnabled(d) {
+             return context.photos().showsPhotoType(d);

            }
            }

+
+           var ul = selection.selectAll('.layer-list-photo-types').data([0]);
+           ul.exit().remove();
+           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photo-types').merge(ul);
+           var li = ul.selectAll('.list-item-photo-types').data(context.photos().shouldFilterByPhotoType() ? data : []);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', function (d) {
+             return 'list-item-photo-types list-item-' + d;
+           });
+           var labelEnter = liEnter.append('label').each(function (d) {
+             select(this).call(uiTooltip().title(_t.html('photo_overlays.photo_type.' + d + '.tooltip')).placement('top'));
+           });
+           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+             context.photos().togglePhotoType(d);
+           });
+           labelEnter.append('span').html(function (d) {
+             return _t.html('photo_overlays.photo_type.' + d + '.title');
+           }); // Update
+
+           li.merge(liEnter).classed('active', typeEnabled).selectAll('input').property('checked', typeEnabled);

          }
          }

-       };

 
 

-       var RayCrossingCounter = function RayCrossingCounter () {
-         this._p = null;
-         this._crossingCount = 0;
-         this._isPointOnSegment = false;
-         var p = arguments[0];
-         this._p = p;
-       };
-       RayCrossingCounter.prototype.countSegment = function countSegment (p1, p2) {
-         if (p1.x < this._p.x && p2.x < this._p.x) { return null }
-         if (this._p.x === p2.x && this._p.y === p2.y) {
-           this._isPointOnSegment = true;
-           return null
-         }
-         if (p1.y === this._p.y && p2.y === this._p.y) {
-           var minx = p1.x;
-           var maxx = p2.x;
-           if (minx > maxx) {
-             minx = p2.x;
-             maxx = p1.x;
-           }
-           if (this._p.x >= minx && this._p.x <= maxx) {
-             this._isPointOnSegment = true;
-           }
-           return null
-         }
-         if ((p1.y > this._p.y && p2.y <= this._p.y) || (p2.y > this._p.y && p1.y <= this._p.y)) {
-           var x1 = p1.x - this._p.x;
-           var y1 = p1.y - this._p.y;
-           var x2 = p2.x - this._p.x;
-           var y2 = p2.y - this._p.y;
-           var xIntSign = RobustDeterminant.signOfDet2x2(x1, y1, x2, y2);
-           if (xIntSign === 0.0) {
-             this._isPointOnSegment = true;
-             return null
-           }
-           if (y2 < y1) { xIntSign = -xIntSign; }
-           if (xIntSign > 0.0) {
-             this._crossingCount++;
+         function drawDateFilter(selection) {
+           var data = context.photos().dateFilters();
+
+           function filterEnabled(d) {
+             return context.photos().dateFilterValue(d);

            }
            }

+
+           var ul = selection.selectAll('.layer-list-date-filter').data([0]);
+           ul.exit().remove();
+           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-date-filter').merge(ul);
+           var li = ul.selectAll('.list-item-date-filter').data(context.photos().shouldFilterByDate() ? data : []);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', 'list-item-date-filter');
+           var labelEnter = liEnter.append('label').each(function (d) {
+             select(this).call(uiTooltip().title(_t.html('photo_overlays.date_filter.' + d + '.tooltip')).placement('top'));
+           });
+           labelEnter.append('span').html(function (d) {
+             return _t.html('photo_overlays.date_filter.' + d + '.title');
+           });
+           labelEnter.append('input').attr('type', 'date').attr('class', 'list-item-input').attr('placeholder', _t('units.year_month_day')).call(utilNoAuto).each(function (d) {
+             utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+           }).on('change', function (d3_event, d) {
+             var value = utilGetSetValue(select(this)).trim();
+             context.photos().setDateFilter(d, value, true); // reload the displayed dates
+
+             li.selectAll('input').each(function (d) {
+               utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+             });
+           });
+           li = li.merge(liEnter).classed('active', filterEnabled);

          }
          }

-       };
-       RayCrossingCounter.prototype.isPointInPolygon = function isPointInPolygon () {
-         return this.getLocation() !== Location.EXTERIOR
-       };
-       RayCrossingCounter.prototype.getLocation = function getLocation () {
-         if (this._isPointOnSegment) { return Location.BOUNDARY }
-         if (this._crossingCount % 2 === 1) {
-           return Location.INTERIOR
-         }
-         return Location.EXTERIOR
-       };
-       RayCrossingCounter.prototype.isOnSegment = function isOnSegment () {
-         return this._isPointOnSegment
-       };
-       RayCrossingCounter.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       RayCrossingCounter.prototype.getClass = function getClass () {
-         return RayCrossingCounter
-       };
-       RayCrossingCounter.locatePointInRing = function locatePointInRing () {
-         if (arguments[0] instanceof Coordinate && hasInterface(arguments[1], CoordinateSequence)) {
-           var p = arguments[0];
-           var ring = arguments[1];
-           var counter = new RayCrossingCounter(p);
-           var p1 = new Coordinate();
-           var p2 = new Coordinate();
-           for (var i = 1; i < ring.size(); i++) {
-             ring.getCoordinate(i, p1);
-             ring.getCoordinate(i - 1, p2);
-             counter.countSegment(p1, p2);
-             if (counter.isOnSegment()) { return counter.getLocation() }
-           }
-           return counter.getLocation()
-         } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Array) {
-           var p$1 = arguments[0];
-           var ring$1 = arguments[1];
-           var counter$1 = new RayCrossingCounter(p$1);
-           for (var i$1 = 1; i$1 < ring$1.length; i$1++) {
-             var p1$1 = ring$1[i$1];
-             var p2$1 = ring$1[i$1 - 1];
-             counter$1.countSegment(p1$1, p2$1);
-             if (counter$1.isOnSegment()) { return counter$1.getLocation() }
-           }
-           return counter$1.getLocation()
-         }
-       };

 
 

-       var CGAlgorithms = function CGAlgorithms () {};
+         function drawUsernameFilter(selection) {
+           function filterEnabled() {
+             return context.photos().usernames();
+           }

 
 

-       var staticAccessors$3 = { CLOCKWISE: { configurable: true },RIGHT: { configurable: true },COUNTERCLOCKWISE: { configurable: true },LEFT: { configurable: true },COLLINEAR: { configurable: true },STRAIGHT: { configurable: true } };
+           var ul = selection.selectAll('.layer-list-username-filter').data([0]);
+           ul.exit().remove();
+           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-username-filter').merge(ul);
+           var li = ul.selectAll('.list-item-username-filter').data(context.photos().shouldFilterByUsername() ? ['username-filter'] : []);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', 'list-item-username-filter');
+           var labelEnter = liEnter.append('label').each(function () {
+             select(this).call(uiTooltip().title(_t.html('photo_overlays.username_filter.tooltip')).placement('top'));
+           });
+           labelEnter.append('span').html(_t.html('photo_overlays.username_filter.title'));
+           labelEnter.append('input').attr('type', 'text').attr('class', 'list-item-input').call(utilNoAuto).property('value', usernameValue).on('change', function () {
+             var value = select(this).property('value');
+             context.photos().setUsernameFilter(value, true);
+             select(this).property('value', usernameValue);
+           });
+           li.merge(liEnter).classed('active', filterEnabled);

 
 

-       CGAlgorithms.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       CGAlgorithms.prototype.getClass = function getClass () {
-         return CGAlgorithms
-       };
-       CGAlgorithms.orientationIndex = function orientationIndex (p1, p2, q) {
-         return CGAlgorithmsDD.orientationIndex(p1, p2, q)
-       };
-       CGAlgorithms.signedArea = function signedArea () {
-         if (arguments[0] instanceof Array) {
-           var ring = arguments[0];
-           if (ring.length < 3) { return 0.0 }
-           var sum = 0.0;
-           var x0 = ring[0].x;
-           for (var i = 1; i < ring.length - 1; i++) {
-             var x = ring[i].x - x0;
-             var y1 = ring[i + 1].y;
-             var y2 = ring[i - 1].y;
-             sum += x * (y2 - y1);
-           }
-           return sum / 2.0
-         } else if (hasInterface(arguments[0], CoordinateSequence)) {
-           var ring$1 = arguments[0];
-           var n = ring$1.size();
-           if (n < 3) { return 0.0 }
-           var p0 = new Coordinate();
-           var p1 = new Coordinate();
-           var p2 = new Coordinate();
-           ring$1.getCoordinate(0, p1);
-           ring$1.getCoordinate(1, p2);
-           var x0$1 = p1.x;
-           p2.x -= x0$1;
-           var sum$1 = 0.0;
-           for (var i$1 = 1; i$1 < n - 1; i$1++) {
-             p0.y = p1.y;
-             p1.x = p2.x;
-             p1.y = p2.y;
-             ring$1.getCoordinate(i$1 + 1, p2);
-             p2.x -= x0$1;
-             sum$1 += p1.x * (p0.y - p2.y);
-           }
-           return sum$1 / 2.0
-         }
-       };
-       CGAlgorithms.distanceLineLine = function distanceLineLine (A, B, C, D) {
-         if (A.equals(B)) { return CGAlgorithms.distancePointLine(A, C, D) }
-         if (C.equals(D)) { return CGAlgorithms.distancePointLine(D, A, B) }
-         var noIntersection = false;
-         if (!Envelope.intersects(A, B, C, D)) {
-           noIntersection = true;
-         } else {
-           var denom = (B.x - A.x) * (D.y - C.y) - (B.y - A.y) * (D.x - C.x);
-           if (denom === 0) {
-             noIntersection = true;
-           } else {
-             var rNumb = (A.y - C.y) * (D.x - C.x) - (A.x - C.x) * (D.y - C.y);
-             var sNum = (A.y - C.y) * (B.x - A.x) - (A.x - C.x) * (B.y - A.y);
-             var s = sNum / denom;
-             var r = rNumb / denom;
-             if (r < 0 || r > 1 || s < 0 || s > 1) {
-               noIntersection = true;
-             }
+           function usernameValue() {
+             var usernames = context.photos().usernames();
+             if (usernames) return usernames.join('; ');
+             return usernames;

            }
          }
            }
          }

-         if (noIntersection) {
-           return MathUtil.min(CGAlgorithms.distancePointLine(A, C, D), CGAlgorithms.distancePointLine(B, C, D), CGAlgorithms.distancePointLine(C, A, B), CGAlgorithms.distancePointLine(D, A, B))
-         }
-         return 0.0
-       };
-       CGAlgorithms.isPointInRing = function isPointInRing (p, ring) {
-         return CGAlgorithms.locatePointInRing(p, ring) !== Location.EXTERIOR
-       };
-       CGAlgorithms.computeLength = function computeLength (pts) {
-         var n = pts.size();
-         if (n <= 1) { return 0.0 }
-         var len = 0.0;
-         var p = new Coordinate();
-         pts.getCoordinate(0, p);
-         var x0 = p.x;
-         var y0 = p.y;
-         for (var i = 1; i < n; i++) {
-           pts.getCoordinate(i, p);
-           var x1 = p.x;
-           var y1 = p.y;
-           var dx = x1 - x0;
-           var dy = y1 - y0;
-           len += Math.sqrt(dx * dx + dy * dy);
-           x0 = x1;
-           y0 = y1;
-         }
-         return len
-       };
-       CGAlgorithms.isCCW = function isCCW (ring) {
-         var nPts = ring.length - 1;
-         if (nPts < 3) { throw new IllegalArgumentException('Ring has fewer than 4 points, so orientation cannot be determined') }
-         var hiPt = ring[0];
-         var hiIndex = 0;
-         for (var i = 1; i <= nPts; i++) {
-           var p = ring[i];
-           if (p.y > hiPt.y) {
-             hiPt = p;
-             hiIndex = i;
-           }
-         }
-         var iPrev = hiIndex;
-         do {
-           iPrev = iPrev - 1;
-           if (iPrev < 0) { iPrev = nPts; }
-         } while (ring[iPrev].equals2D(hiPt) && iPrev !== hiIndex)
-         var iNext = hiIndex;
-         do {
-           iNext = (iNext + 1) % nPts;
-         } while (ring[iNext].equals2D(hiPt) && iNext !== hiIndex)
-         var prev = ring[iPrev];
-         var next = ring[iNext];
-         if (prev.equals2D(hiPt) || next.equals2D(hiPt) || prev.equals2D(next)) { return false }
-         var disc = CGAlgorithms.computeOrientation(prev, hiPt, next);
-         var isCCW = false;
-         if (disc === 0) {
-           isCCW = prev.x > next.x;
-         } else {
-           isCCW = disc > 0;
+
+         function toggleLayer(which) {
+           setLayer(which, !showsLayer(which));

          }
          }

-         return isCCW
-       };
-       CGAlgorithms.locatePointInRing = function locatePointInRing (p, ring) {
-         return RayCrossingCounter.locatePointInRing(p, ring)
-       };
-       CGAlgorithms.distancePointLinePerpendicular = function distancePointLinePerpendicular (p, A, B) {
-         var len2 = (B.x - A.x) * (B.x - A.x) + (B.y - A.y) * (B.y - A.y);
-         var s = ((A.y - p.y) * (B.x - A.x) - (A.x - p.x) * (B.y - A.y)) / len2;
-         return Math.abs(s) * Math.sqrt(len2)
-       };
-       CGAlgorithms.computeOrientation = function computeOrientation (p1, p2, q) {
-         return CGAlgorithms.orientationIndex(p1, p2, q)
-       };
-       CGAlgorithms.distancePointLine = function distancePointLine () {
-         if (arguments.length === 2) {
-           var p = arguments[0];
-           var line = arguments[1];
-           if (line.length === 0) { throw new IllegalArgumentException('Line array must contain at least one vertex') }
-           var minDistance = p.distance(line[0]);
-           for (var i = 0; i < line.length - 1; i++) {
-             var dist = CGAlgorithms.distancePointLine(p, line[i], line[i + 1]);
-             if (dist < minDistance) {
-               minDistance = dist;
-             }
-           }
-           return minDistance
-         } else if (arguments.length === 3) {
-           var p$1 = arguments[0];
-           var A = arguments[1];
-           var B = arguments[2];
-           if (A.x === B.x && A.y === B.y) { return p$1.distance(A) }
-           var len2 = (B.x - A.x) * (B.x - A.x) + (B.y - A.y) * (B.y - A.y);
-           var r = ((p$1.x - A.x) * (B.x - A.x) + (p$1.y - A.y) * (B.y - A.y)) / len2;
-           if (r <= 0.0) { return p$1.distance(A) }
-           if (r >= 1.0) { return p$1.distance(B) }
-           var s = ((A.y - p$1.y) * (B.x - A.x) - (A.x - p$1.x) * (B.y - A.y)) / len2;
-           return Math.abs(s) * Math.sqrt(len2)
+
+         function showsLayer(which) {
+           var layer = layers.layer(which);
+
+           if (layer) {
+             return layer.enabled();
+           }
+
+           return false;

          }
          }

-       };
-       CGAlgorithms.isOnLine = function isOnLine (p, pt) {
-         var lineIntersector = new RobustLineIntersector();
-         for (var i = 1; i < pt.length; i++) {
-           var p0 = pt[i - 1];
-           var p1 = pt[i];
-           lineIntersector.computeIntersection(p, p0, p1);
-           if (lineIntersector.hasIntersection()) {
-             return true
+
+         function setLayer(which, enabled) {
+           var layer = layers.layer(which);
+
+           if (layer) {
+             layer.enabled(enabled);

            }
          }
            }
          }

-         return false
-       };
-       staticAccessors$3.CLOCKWISE.get = function () { return -1 };
-       staticAccessors$3.RIGHT.get = function () { return CGAlgorithms.CLOCKWISE };
-       staticAccessors$3.COUNTERCLOCKWISE.get = function () { return 1 };
-       staticAccessors$3.LEFT.get = function () { return CGAlgorithms.COUNTERCLOCKWISE };
-       staticAccessors$3.COLLINEAR.get = function () { return 0 };
-       staticAccessors$3.STRAIGHT.get = function () { return CGAlgorithms.COLLINEAR };

 
 

-       Object.defineProperties( CGAlgorithms, staticAccessors$3 );
+         context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
+         context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
+         return section;
+       }

 
 

-       var GeometryComponentFilter = function GeometryComponentFilter () {};
+       function uiPaneMapData(context) {
+         var mapDataPane = uiPane('map-data', context).key(_t('map_data.key')).label(_t.html('map_data.title')).description(_t.html('map_data.description')).iconName('iD-icon-data').sections([uiSectionDataLayers(context), uiSectionPhotoOverlays(context), uiSectionMapStyleOptions(context), uiSectionMapFeatures(context)]);
+         return mapDataPane;
+       }

 
 

-       GeometryComponentFilter.prototype.filter = function filter (geom) {};
-       GeometryComponentFilter.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       GeometryComponentFilter.prototype.getClass = function getClass () {
-         return GeometryComponentFilter
-       };
+       function uiSectionPrivacy(context) {
+         var section = uiSection('preferences-third-party', context).label(_t.html('preferences.privacy.title')).disclosureContent(renderDisclosureContent);

 
 

-       var Geometry = function Geometry () {
-         var factory = arguments[0];
+         var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';

 
 

-         this._envelope = null;
-         this._factory = null;
-         this._SRID = null;
-         this._userData = null;
-         this._factory = factory;
-         this._SRID = factory.getSRID();
-       };
+         function renderDisclosureContent(selection) {
+           // enter
+           var privacyOptionsListEnter = selection.selectAll('.privacy-options-list').data([0]).enter().append('ul').attr('class', 'layer-list privacy-options-list');
+           var thirdPartyIconsEnter = privacyOptionsListEnter.append('li').attr('class', 'privacy-third-party-icons-item').append('label').call(uiTooltip().title(_t.html('preferences.privacy.third_party_icons.tooltip')).placement('bottom'));
+           thirdPartyIconsEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+             d3_event.preventDefault();
+             _showThirdPartyIcons = _showThirdPartyIcons === 'true' ? 'false' : 'true';
+             corePreferences('preferences.privacy.thirdpartyicons', _showThirdPartyIcons);
+             update();
+           });
+           thirdPartyIconsEnter.append('span').html(_t.html('preferences.privacy.third_party_icons.description')); // Privacy Policy link

 
 

-       var staticAccessors$11 = { serialVersionUID: { configurable: true },SORTINDEX_POINT: { configurable: true },SORTINDEX_MULTIPOINT: { configurable: true },SORTINDEX_LINESTRING: { configurable: true },SORTINDEX_LINEARRING: { configurable: true },SORTINDEX_MULTILINESTRING: { configurable: true },SORTINDEX_POLYGON: { configurable: true },SORTINDEX_MULTIPOLYGON: { configurable: true },SORTINDEX_GEOMETRYCOLLECTION: { configurable: true },geometryChangedFilter: { configurable: true } };
-       Geometry.prototype.isGeometryCollection = function isGeometryCollection () {
-         return this.getSortIndex() === Geometry.SORTINDEX_GEOMETRYCOLLECTION
-       };
-       Geometry.prototype.getFactory = function getFactory () {
-         return this._factory
-       };
-       Geometry.prototype.getGeometryN = function getGeometryN (n) {
-         return this
-       };
-       Geometry.prototype.getArea = function getArea () {
-         return 0.0
-       };
-       Geometry.prototype.isRectangle = function isRectangle () {
-         return false
-       };
-       Geometry.prototype.equals = function equals () {
-         if (arguments[0] instanceof Geometry) {
-           var g$1 = arguments[0];
-           if (g$1 === null) { return false }
-           return this.equalsTopo(g$1)
-         } else if (arguments[0] instanceof Object) {
-           var o = arguments[0];
-           if (!(o instanceof Geometry)) { return false }
-           var g = o;
-           return this.equalsExact(g)
-         }
-       };
-       Geometry.prototype.equalsExact = function equalsExact (other) {
-         return this === other || this.equalsExact(other, 0)
-       };
-       Geometry.prototype.geometryChanged = function geometryChanged () {
-         this.apply(Geometry.geometryChangedFilter);
-       };
-       Geometry.prototype.geometryChangedAction = function geometryChangedAction () {
-         this._envelope = null;
-       };
-       Geometry.prototype.equalsNorm = function equalsNorm (g) {
-         if (g === null) { return false }
-         return this.norm().equalsExact(g.norm())
-       };
-       Geometry.prototype.getLength = function getLength () {
-         return 0.0
-       };
-       Geometry.prototype.getNumGeometries = function getNumGeometries () {
-         return 1
-       };
-       Geometry.prototype.compareTo = function compareTo () {
-         if (arguments.length === 1) {
-           var o = arguments[0];
-           var other = o;
-           if (this.getSortIndex() !== other.getSortIndex()) {
-             return this.getSortIndex() - other.getSortIndex()
-           }
-           if (this.isEmpty() && other.isEmpty()) {
-             return 0
-           }
-           if (this.isEmpty()) {
-             return -1
-           }
-           if (other.isEmpty()) {
-             return 1
-           }
-           return this.compareToSameClass(o)
-         } else if (arguments.length === 2) {
-           var other$1 = arguments[0];
-           var comp = arguments[1];
-           if (this.getSortIndex() !== other$1.getSortIndex()) {
-             return this.getSortIndex() - other$1.getSortIndex()
-           }
-           if (this.isEmpty() && other$1.isEmpty()) {
-             return 0
-           }
-           if (this.isEmpty()) {
-             return -1
-           }
-           if (other$1.isEmpty()) {
-             return 1
+           selection.selectAll('.privacy-link').data([0]).enter().append('div').attr('class', 'privacy-link').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/release/PRIVACY.md').append('span').html(_t.html('preferences.privacy.privacy_link'));
+           update();
+
+           function update() {
+             selection.selectAll('.privacy-third-party-icons-item').classed('active', _showThirdPartyIcons === 'true').select('input').property('checked', _showThirdPartyIcons === 'true');

            }
            }

-           return this.compareToSameClass(other$1, comp)
-         }
-       };
-       Geometry.prototype.getUserData = function getUserData () {
-         return this._userData
-       };
-       Geometry.prototype.getSRID = function getSRID () {
-         return this._SRID
-       };
-       Geometry.prototype.getEnvelope = function getEnvelope () {
-         return this.getFactory().toGeometry(this.getEnvelopeInternal())
-       };
-       Geometry.prototype.checkNotGeometryCollection = function checkNotGeometryCollection (g) {
-         if (g.getSortIndex() === Geometry.SORTINDEX_GEOMETRYCOLLECTION) {
-           throw new IllegalArgumentException('This method does not support GeometryCollection arguments')
-         }
-       };
-       Geometry.prototype.equal = function equal (a, b, tolerance) {
-         if (tolerance === 0) {
-           return a.equals(b)
-         }
-         return a.distance(b) <= tolerance
-       };
-       Geometry.prototype.norm = function norm () {
-         var copy = this.copy();
-         copy.normalize();
-         return copy
-       };
-       Geometry.prototype.getPrecisionModel = function getPrecisionModel () {
-         return this._factory.getPrecisionModel()
-       };
-       Geometry.prototype.getEnvelopeInternal = function getEnvelopeInternal () {
-         if (this._envelope === null) {
-           this._envelope = this.computeEnvelopeInternal();

          }
          }

-         return new Envelope(this._envelope)
-       };
-       Geometry.prototype.setSRID = function setSRID (SRID) {
-         this._SRID = SRID;
-       };
-       Geometry.prototype.setUserData = function setUserData (userData) {
-         this._userData = userData;
-       };
-       Geometry.prototype.compare = function compare (a, b) {
-         var i = a.iterator();
-         var j = b.iterator();
-         while (i.hasNext() && j.hasNext()) {
-           var aElement = i.next();
-           var bElement = j.next();
-           var comparison = aElement.compareTo(bElement);
-           if (comparison !== 0) {
-             return comparison
+
+         return section;
+       }
+
+       function uiPanePreferences(context) {
+         var preferencesPane = uiPane('preferences', context).key(_t('preferences.key')).label(_t.html('preferences.title')).description(_t.html('preferences.description')).iconName('fas-user-cog').sections([uiSectionPrivacy(context)]);
+         return preferencesPane;
+       }
+
+       function uiInit(context) {
+         var _initCounter = 0;
+         var _needWidth = {};
+
+         var _lastPointerType;
+
+         function render(container) {
+           container.on('click.ui', function (d3_event) {
+             // we're only concerned with the primary mouse button
+             if (d3_event.button !== 0) return;
+             if (!d3_event.composedPath) return; // some targets have default click events we don't want to override
+
+             var isOkayTarget = d3_event.composedPath().some(function (node) {
+               // we only care about element nodes
+               return node.nodeType === 1 && ( // clicking <input> focuses it and/or changes a value
+               node.nodeName === 'INPUT' || // clicking <label> affects its <input> by default
+               node.nodeName === 'LABEL' || // clicking <a> opens a hyperlink by default
+               node.nodeName === 'A');
+             });
+             if (isOkayTarget) return; // disable double-tap-to-zoom on touchscreens
+
+             d3_event.preventDefault();
+           });
+           var detected = utilDetect(); // only WebKit supports gesture events
+
+           if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
+           // but we only need to do this on desktop Safari anyway. – #7694
+           !detected.isMobileWebKit) {
+             // On iOS we disable pinch-to-zoom of the UI via the `touch-action`
+             // CSS property, but on desktop Safari we need to manually cancel the
+             // default gesture events.
+             container.on('gesturestart.ui gesturechange.ui gestureend.ui', function (d3_event) {
+               // disable pinch-to-zoom of the UI via multitouch trackpads on macOS Safari
+               d3_event.preventDefault();
+             });

            }
            }

-         }
-         if (i.hasNext()) {
-           return 1
-         }
-         if (j.hasNext()) {
-           return -1
-         }
-         return 0
-       };
-       Geometry.prototype.hashCode = function hashCode () {
-         return this.getEnvelopeInternal().hashCode()
-       };
-       Geometry.prototype.isGeometryCollectionOrDerived = function isGeometryCollectionOrDerived () {
-         if (this.getSortIndex() === Geometry.SORTINDEX_GEOMETRYCOLLECTION || this.getSortIndex() === Geometry.SORTINDEX_MULTIPOINT || this.getSortIndex() === Geometry.SORTINDEX_MULTILINESTRING || this.getSortIndex() === Geometry.SORTINDEX_MULTIPOLYGON) {
-           return true
-         }
-         return false
-       };
-       Geometry.prototype.interfaces_ = function interfaces_ () {
-         return [Clonable, Comparable, Serializable]
-       };
-       Geometry.prototype.getClass = function getClass () {
-         return Geometry
-       };
-       Geometry.hasNonEmptyElements = function hasNonEmptyElements (geometries) {
-         for (var i = 0; i < geometries.length; i++) {
-           if (!geometries[i].isEmpty()) {
-             return true
+
+           if ('PointerEvent' in window) {
+             select(window).on('pointerdown.ui pointerup.ui', function (d3_event) {
+               var pointerType = d3_event.pointerType || 'mouse';
+
+               if (_lastPointerType !== pointerType) {
+                 _lastPointerType = pointerType;
+                 container.attr('pointer', pointerType);
+               }
+             }, true);
+           } else {
+             _lastPointerType = 'mouse';
+             container.attr('pointer', 'mouse');

            }
            }

-         }
-         return false
-       };
-       Geometry.hasNullElements = function hasNullElements (array) {
-         for (var i = 0; i < array.length; i++) {
-           if (array[i] === null) {
-             return true
+
+           container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)
+
+           container.call(uiFullScreen(context));
+           var map = context.map();
+           map.redrawEnable(false); // don't draw until we've set zoom/lat/long
+
+           map.on('hitMinZoom.ui', function () {
+             ui.flash.iconName('#iD-icon-no').label(_t.html('cannot_zoom'))();
+           });
+           container.append('svg').attr('id', 'ideditor-defs').call(ui.svgDefs);
+           container.append('div').attr('class', 'sidebar').call(ui.sidebar);
+           var content = container.append('div').attr('class', 'main-content active'); // Top toolbar
+
+           content.append('div').attr('class', 'top-toolbar-wrap').append('div').attr('class', 'top-toolbar fillD').call(uiTopToolbar(context));
+           content.append('div').attr('class', 'main-map').attr('dir', 'ltr').call(map);
+           var overMap = content.append('div').attr('class', 'over-map'); // HACK: Mobile Safari 14 likes to select anything selectable when long-
+           // pressing, even if it's not targeted. This conflicts with long-pressing
+           // to show the edit menu. We add a selectable offscreen element as the first
+           // child to trick Safari into not showing the selection UI.
+
+           overMap.append('div').attr('class', 'select-trap').text('t');
+           overMap.call(uiMapInMap(context)).call(uiNotice(context));
+           overMap.append('div').attr('class', 'spinner').call(uiSpinner(context)); // Map controls
+
+           var controls = overMap.append('div').attr('class', 'map-controls');
+           controls.append('div').attr('class', 'map-control zoombuttons').call(uiZoom(context));
+           controls.append('div').attr('class', 'map-control zoom-to-selection-control').call(uiZoomToSelection(context));
+           controls.append('div').attr('class', 'map-control geolocate-control').call(uiGeolocate(context));
+           controls.on('wheel.mapControls', function (d3_event) {
+             if (!d3_event.deltaX) {
+               controls.node().scrollTop += d3_event.deltaY;
+             }
+           }); // Add panes
+           // This should happen after map is initialized, as some require surface()
+
+           var panes = overMap.append('div').attr('class', 'map-panes');
+           var uiPanes = [uiPaneBackground(context), uiPaneMapData(context), uiPaneIssues(context), uiPanePreferences(context), uiPaneHelp(context)];
+           uiPanes.forEach(function (pane) {
+             controls.append('div').attr('class', 'map-control map-pane-control ' + pane.id + '-control').call(pane.renderToggleButton);
+             panes.call(pane.renderPane);
+           });
+           ui.info = uiInfo(context);
+           overMap.call(ui.info);
+           overMap.append('div').attr('class', 'photoviewer').classed('al', true) // 'al'=left,  'ar'=right
+           .classed('hide', true).call(ui.photoviewer);
+           overMap.append('div').attr('class', 'attribution-wrap').attr('dir', 'ltr').call(uiAttribution(context)); // Add footer
+
+           var about = content.append('div').attr('class', 'map-footer');
+           about.append('div').attr('class', 'api-status').call(uiStatus(context));
+           var footer = about.append('div').attr('class', 'map-footer-bar fillD');
+           footer.append('div').attr('class', 'flash-wrap footer-hide');
+           var footerWrap = footer.append('div').attr('class', 'main-footer-wrap footer-show');
+           footerWrap.append('div').attr('class', 'scale-block').call(uiScale(context));
+           var aboutList = footerWrap.append('div').attr('class', 'info-block').append('ul').attr('class', 'map-footer-list');
+           aboutList.append('li').attr('class', 'user-list').call(uiContributors(context));
+           var apiConnections = context.apiConnections();
+
+           if (apiConnections && apiConnections.length > 1) {
+             aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(apiConnections));

            }
            }

-         }
-         return false
-       };
-       staticAccessors$11.serialVersionUID.get = function () { return 8763622679187376702 };
-       staticAccessors$11.SORTINDEX_POINT.get = function () { return 0 };
-       staticAccessors$11.SORTINDEX_MULTIPOINT.get = function () { return 1 };
-       staticAccessors$11.SORTINDEX_LINESTRING.get = function () { return 2 };
-       staticAccessors$11.SORTINDEX_LINEARRING.get = function () { return 3 };
-       staticAccessors$11.SORTINDEX_MULTILINESTRING.get = function () { return 4 };
-       staticAccessors$11.SORTINDEX_POLYGON.get = function () { return 5 };
-       staticAccessors$11.SORTINDEX_MULTIPOLYGON.get = function () { return 6 };
-       staticAccessors$11.SORTINDEX_GEOMETRYCOLLECTION.get = function () { return 7 };
-       staticAccessors$11.geometryChangedFilter.get = function () { return geometryChangedFilter };
-
-       Object.defineProperties( Geometry, staticAccessors$11 );
-
-       var geometryChangedFilter = function geometryChangedFilter () {};
-
-       geometryChangedFilter.interfaces_ = function interfaces_ () {
-         return [GeometryComponentFilter]
-       };
-       geometryChangedFilter.filter = function filter (geom) {
-         geom.geometryChangedAction();
-       };

 
 

-       var CoordinateFilter = function CoordinateFilter () {};
+           aboutList.append('li').attr('class', 'issues-info').call(uiIssuesInfo(context));
+           aboutList.append('li').attr('class', 'feature-warning').call(uiFeatureInfo(context));
+           var issueLinks = aboutList.append('li');
+           issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/issues').call(svgIcon('#iD-icon-bug', 'light')).call(uiTooltip().title(_t.html('report_a_bug')).placement('top'));
+           issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/develop/CONTRIBUTING.md#translating').call(svgIcon('#iD-icon-translate', 'light')).call(uiTooltip().title(_t.html('help_translate')).placement('top'));
+           aboutList.append('li').attr('class', 'version').call(uiVersion(context));

 
 

-       CoordinateFilter.prototype.filter = function filter (coord) {};
-       CoordinateFilter.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       CoordinateFilter.prototype.getClass = function getClass () {
-         return CoordinateFilter
-       };
+           if (!context.embed()) {
+             aboutList.call(uiAccount(context));
+           } // Setup map dimensions and move map to initial center/zoom.
+           // This should happen after .main-content and toolbars exist.

 
 

-       var BoundaryNodeRule = function BoundaryNodeRule () {};

 
 

-       var staticAccessors$12 = { Mod2BoundaryNodeRule: { configurable: true },EndPointBoundaryNodeRule: { configurable: true },MultiValentEndPointBoundaryNodeRule: { configurable: true },MonoValentEndPointBoundaryNodeRule: { configurable: true },MOD2_BOUNDARY_RULE: { configurable: true },ENDPOINT_BOUNDARY_RULE: { configurable: true },MULTIVALENT_ENDPOINT_BOUNDARY_RULE: { configurable: true },MONOVALENT_ENDPOINT_BOUNDARY_RULE: { configurable: true },OGC_SFS_BOUNDARY_RULE: { configurable: true } };
+           ui.onResize();
+           map.redrawEnable(true);
+           ui.hash = behaviorHash(context);
+           ui.hash();

 
 

-       BoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {};
-       BoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       BoundaryNodeRule.prototype.getClass = function getClass () {
-         return BoundaryNodeRule
-       };
-       staticAccessors$12.Mod2BoundaryNodeRule.get = function () { return Mod2BoundaryNodeRule };
-       staticAccessors$12.EndPointBoundaryNodeRule.get = function () { return EndPointBoundaryNodeRule };
-       staticAccessors$12.MultiValentEndPointBoundaryNodeRule.get = function () { return MultiValentEndPointBoundaryNodeRule };
-       staticAccessors$12.MonoValentEndPointBoundaryNodeRule.get = function () { return MonoValentEndPointBoundaryNodeRule };
-       staticAccessors$12.MOD2_BOUNDARY_RULE.get = function () { return new Mod2BoundaryNodeRule() };
-       staticAccessors$12.ENDPOINT_BOUNDARY_RULE.get = function () { return new EndPointBoundaryNodeRule() };
-       staticAccessors$12.MULTIVALENT_ENDPOINT_BOUNDARY_RULE.get = function () { return new MultiValentEndPointBoundaryNodeRule() };
-       staticAccessors$12.MONOVALENT_ENDPOINT_BOUNDARY_RULE.get = function () { return new MonoValentEndPointBoundaryNodeRule() };
-       staticAccessors$12.OGC_SFS_BOUNDARY_RULE.get = function () { return BoundaryNodeRule.MOD2_BOUNDARY_RULE };
-
-       Object.defineProperties( BoundaryNodeRule, staticAccessors$12 );
-
-       var Mod2BoundaryNodeRule = function Mod2BoundaryNodeRule () {};
-
-       Mod2BoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-         return boundaryCount % 2 === 1
-       };
-       Mod2BoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-         return [BoundaryNodeRule]
-       };
-       Mod2BoundaryNodeRule.prototype.getClass = function getClass () {
-         return Mod2BoundaryNodeRule
-       };
+           if (!ui.hash.hadHash) {
+             map.centerZoom([0, 0], 2);
+           } // Bind events

 
 

-       var EndPointBoundaryNodeRule = function EndPointBoundaryNodeRule () {};

 
 

-       EndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-         return boundaryCount > 0
-       };
-       EndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-         return [BoundaryNodeRule]
-       };
-       EndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-         return EndPointBoundaryNodeRule
-       };
+           window.onbeforeunload = function () {
+             return context.save();
+           };

 
 

-       var MultiValentEndPointBoundaryNodeRule = function MultiValentEndPointBoundaryNodeRule () {};
+           window.onunload = function () {
+             context.history().unlock();
+           };

 
 

-       MultiValentEndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-         return boundaryCount > 1
-       };
-       MultiValentEndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-         return [BoundaryNodeRule]
-       };
-       MultiValentEndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-         return MultiValentEndPointBoundaryNodeRule
-       };
+           select(window).on('resize.editor', function () {
+             ui.onResize();
+           });
+           var panPixels = 80;
+           context.keybinding().on('⌫', function (d3_event) {
+             d3_event.preventDefault();
+           }).on([_t('sidebar.key'), '`', '²', '@'], ui.sidebar.toggle) // #5663, #6864 - common QWERTY, AZERTY
+           .on('←', pan([panPixels, 0])).on('↑', pan([0, panPixels])).on('→', pan([-panPixels, 0])).on('↓', pan([0, -panPixels])).on(uiCmd('⌥←'), pan([map.dimensions()[0], 0])).on(uiCmd('⌥↑'), pan([0, map.dimensions()[1]])).on(uiCmd('⌥→'), pan([-map.dimensions()[0], 0])).on(uiCmd('⌥↓'), pan([0, -map.dimensions()[1]])).on(uiCmd('⌘' + _t('background.key')), function quickSwitch(d3_event) {
+             if (d3_event) {
+               d3_event.stopImmediatePropagation();
+               d3_event.preventDefault();
+             }

 
 

-       var MonoValentEndPointBoundaryNodeRule = function MonoValentEndPointBoundaryNodeRule () {};
+             var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));

 
 

-       MonoValentEndPointBoundaryNodeRule.prototype.isInBoundary = function isInBoundary (boundaryCount) {
-         return boundaryCount === 1
-       };
-       MonoValentEndPointBoundaryNodeRule.prototype.interfaces_ = function interfaces_ () {
-         return [BoundaryNodeRule]
-       };
-       MonoValentEndPointBoundaryNodeRule.prototype.getClass = function getClass () {
-         return MonoValentEndPointBoundaryNodeRule
-       };
+             if (previousBackground) {
+               var currentBackground = context.background().baseLayerSource();
+               corePreferences('background-last-used-toggle', currentBackground.id);
+               corePreferences('background-last-used', previousBackground.id);
+               context.background().baseLayerSource(previousBackground);
+             }
+           }).on(_t('area_fill.wireframe.key'), function toggleWireframe(d3_event) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+             context.map().toggleWireframe();
+           }).on(uiCmd('⌥' + _t('area_fill.wireframe.key')), function toggleOsmData(d3_event) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation(); // Don't allow layer changes while drawing - #6584

 
 

-       // import Iterator from './Iterator'
+             var mode = context.mode();
+             if (mode && /^draw/.test(mode.id)) return;
+             var layer = context.layers().layer('osm');

 
 

-       /**
-        * @see http://download.oracle.com/javase/6/docs/api/java/util/Collection.html
-        *
-        * @constructor
-        * @private
-        */
-       var Collection = function Collection () {};
+             if (layer) {
+               layer.enabled(!layer.enabled());

 
 

-       Collection.prototype.add = function add () {};
+               if (!layer.enabled()) {
+                 context.enter(modeBrowse(context));
+               }
+             }
+           }).on(_t('map_data.highlight_edits.key'), function toggleHighlightEdited(d3_event) {
+             d3_event.preventDefault();
+             context.map().toggleHighlightEdited();
+           });
+           context.on('enter.editor', function (entered) {
+             container.classed('mode-' + entered.id, true);
+           }).on('exit.editor', function (exited) {
+             container.classed('mode-' + exited.id, false);
+           });
+           context.enter(modeBrowse(context));

 
 

-       /**
-        * Appends all of the elements in the specified collection to the end of this
-        * list, in the order that they are returned by the specified collection's
-        * iterator (optional operation).
-        * @param {javascript.util.Collection} c
-        * @return {boolean}
-        */
-       Collection.prototype.addAll = function addAll () {};
+           if (!_initCounter++) {
+             if (!ui.hash.startWalkthrough) {
+               context.container().call(uiSplash(context)).call(uiRestore(context));
+             }

 
 

-       /**
-        * Returns true if this collection contains no elements.
-        * @return {boolean}
-        */
-       Collection.prototype.isEmpty = function isEmpty () {};
+             context.container().call(ui.shortcuts);
+           }

 
 

-       /**
-        * Returns an iterator over the elements in this collection.
-        * @return {javascript.util.Iterator}
-        */
-       Collection.prototype.iterator = function iterator () {};
+           var osm = context.connection();
+           var auth = uiLoading(context).message(_t.html('loading_auth')).blocking(true);

 
 

-       /**
-        * Returns an iterator over the elements in this collection.
-        * @return {number}
-        */
-       Collection.prototype.size = function size () {};
+           if (osm && auth) {
+             osm.on('authLoading.ui', function () {
+               context.container().call(auth);
+             }).on('authDone.ui', function () {
+               auth.close();
+             });
+           }

 
 

-       /**
-        * Returns an array containing all of the elements in this collection.
-        * @return {Array}
-        */
-       Collection.prototype.toArray = function toArray () {};
+           _initCounter++;

 
 

-       /**
-        * Removes a single instance of the specified element from this collection if it
-        * is present. (optional)
-        * @param {Object} e
-        * @return {boolean}
-        */
-       Collection.prototype.remove = function remove () {};
+           if (ui.hash.startWalkthrough) {
+             ui.hash.startWalkthrough = false;
+             context.container().call(uiIntro(context));
+           }

 
 

-       /**
-        * @param {string=} message Optional message
-        * @extends {Error}
-        * @constructor
-        * @private
-        */
-       function IndexOutOfBoundsException (message) {
-         this.message = message || '';
-       }
-       IndexOutOfBoundsException.prototype = new Error();
+           function pan(d) {
+             return function (d3_event) {
+               if (d3_event.shiftKey) return;
+               if (context.container().select('.combobox').size()) return;
+               d3_event.preventDefault();
+               context.map().pan(d, 100);
+             };
+           }
+         }

 
 

-       /**
-        * @type {string}
-        */
-       IndexOutOfBoundsException.prototype.name = 'IndexOutOfBoundsException';
+         var ui = {};

 
 

-       /**
-        * @see http://download.oracle.com/javase/6/docs/api/java/util/Iterator.html
-        * @constructor
-        * @private
-        */
-       var Iterator$1 = function Iterator () {};
+         var _loadPromise; // renders the iD interface into the container node

 
 

-       Iterator$1.prototype.hasNext = function hasNext () {};

 
 

-       /**
-        * Returns the next element in the iteration.
-        * @return {Object}
-        */
-       Iterator$1.prototype.next = function next () {};
+         ui.ensureLoaded = function () {
+           if (_loadPromise) return _loadPromise;
+           return _loadPromise = Promise.all([// must have strings and presets before loading the UI
+           _mainLocalizer.ensureLoaded(), _mainPresetIndex.ensureLoaded()]).then(function () {
+             if (!context.container().empty()) render(context.container());
+           })["catch"](function (err) {
+             return console.error(err);
+           }); // eslint-disable-line
+         }; // `ui.restart()` will destroy and rebuild the entire iD interface,
+         // for example to switch the locale while iD is running.

 
 

-       /**
-        * Removes from the underlying collection the last element returned by the
-        * iterator (optional operation).
-        */
-       Iterator$1.prototype.remove = function remove () {};

 
 

-       /**
-        * @see http://download.oracle.com/javase/6/docs/api/java/util/List.html
-        *
-        * @extends {javascript.util.Collection}
-        * @constructor
-        * @private
-        */
-       var List = (function (Collection$$1) {
-         function List () {
-           Collection$$1.apply(this, arguments);
-         }
+         ui.restart = function () {
+           context.keybinding().clear();
+           _loadPromise = null;
+           context.container().selectAll('*').remove();
+           ui.ensureLoaded();
+         };

 
 

-         if ( Collection$$1 ) { List.__proto__ = Collection$$1; }
-         List.prototype = Object.create( Collection$$1 && Collection$$1.prototype );
-         List.prototype.constructor = List;
+         ui.lastPointerType = function () {
+           return _lastPointerType;
+         };

 
 

-         List.prototype.get = function get () { };
+         ui.svgDefs = svgDefs(context);
+         ui.flash = uiFlash(context);
+         ui.sidebar = uiSidebar(context);
+         ui.photoviewer = uiPhotoviewer(context);
+         ui.shortcuts = uiShortcuts(context);

 
 

-         /**
-          * Replaces the element at the specified position in this list with the
-          * specified element (optional operation).
-          * @param {number} index
-          * @param {Object} e
-          * @return {Object}
-          */
-         List.prototype.set = function set () { };
+         ui.onResize = function (withPan) {
+           var map = context.map(); // Recalc dimensions of map and sidebar.. (`true` = force recalc)
+           // This will call `getBoundingClientRect` and trigger reflow,
+           //  but the values will be cached for later use.

 
 

-         /**
-          * Returns true if this collection contains no elements.
-          * @return {boolean}
-          */
-         List.prototype.isEmpty = function isEmpty () { };
+           var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
+           utilGetDimensions(context.container().select('.sidebar'), true);

 
 

-         return List;
-       }(Collection));
+           if (withPan !== undefined) {
+             map.redrawEnable(false);
+             map.pan(withPan);
+             map.redrawEnable(true);
+           }

 
 

-       /**
-        * @param {string=} message Optional message
-        * @extends {Error}
-        * @constructor
-        * @private
-        */
-       function NoSuchElementException (message) {
-         this.message = message || '';
-       }
-       NoSuchElementException.prototype = new Error();
+           map.dimensions(mapDimensions);
+           ui.photoviewer.onMapResize(); // check if header or footer have overflowed

 
 

-       /**
-        * @type {string}
-        */
-       NoSuchElementException.prototype.name = 'NoSuchElementException';
+           ui.checkOverflow('.top-toolbar');
+           ui.checkOverflow('.map-footer-bar'); // Use outdated code so it works on Explorer

 
 

-       // import OperationNotSupported from './OperationNotSupported'
+           var resizeWindowEvent = document.createEvent('Event');
+           resizeWindowEvent.initEvent('resizeWindow', true, true);
+           document.dispatchEvent(resizeWindowEvent);
+         }; // Call checkOverflow when resizing or whenever the contents change.

 
 

-       /**
-        * @see http://download.oracle.com/javase/6/docs/api/java/util/ArrayList.html
-        *
-        * @extends List
-        * @private
-        */
-       var ArrayList = (function (List$$1) {
-         function ArrayList () {
-           List$$1.call(this);
-           this.array_ = [];

 
 

-           if (arguments[0] instanceof Collection) {
-             this.addAll(arguments[0]);
+         ui.checkOverflow = function (selector, reset) {
+           if (reset) {
+             delete _needWidth[selector];

            }
            }

-         }

 
 

-         if ( List$$1 ) { ArrayList.__proto__ = List$$1; }
-         ArrayList.prototype = Object.create( List$$1 && List$$1.prototype );
-         ArrayList.prototype.constructor = ArrayList;
+           var selection = context.container().select(selector);
+           if (selection.empty()) return;
+           var scrollWidth = selection.property('scrollWidth');
+           var clientWidth = selection.property('clientWidth');
+           var needed = _needWidth[selector] || scrollWidth;

 
 

-         ArrayList.prototype.ensureCapacity = function ensureCapacity () {};
-         ArrayList.prototype.interfaces_ = function interfaces_ () { return [List$$1, Collection] };
+           if (scrollWidth > clientWidth) {
+             // overflow happening
+             selection.classed('narrow', true);

 
 

-         /**
-          * @override
-          */
-         ArrayList.prototype.add = function add (e) {
-           if (arguments.length === 1) {
-             this.array_.push(e);
-           } else {
-             this.array_.splice(arguments[0], arguments[1]);
+             if (!_needWidth[selector]) {
+               _needWidth[selector] = scrollWidth;
+             }
+           } else if (scrollWidth >= needed) {
+             selection.classed('narrow', false);

            }
            }

-           return true

          };
 
          };
 

-         ArrayList.prototype.clear = function clear () {
-           this.array_ = [];
-         };
+         ui.togglePanes = function (showPane) {
+           var hidePanes = context.container().selectAll('.map-pane.shown');
+           var side = _mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left';
+           hidePanes.classed('shown', false).classed('hide', true);
+           context.container().selectAll('.map-pane-control button').classed('active', false);

 
 

-         /**
-          * @override
-          */
-         ArrayList.prototype.addAll = function addAll (c) {
-           var this$1 = this;
+           if (showPane) {
+             hidePanes.classed('shown', false).classed('hide', true).style(side, '-500px');
+             context.container().selectAll('.' + showPane.attr('pane') + '-control button').classed('active', true);
+             showPane.classed('shown', true).classed('hide', false);

 
 

-           for (var i = c.iterator(); i.hasNext();) {
-             this$1.add(i.next());
+             if (hidePanes.empty()) {
+               showPane.style(side, '-500px').transition().duration(200).style(side, '0px');
+             } else {
+               showPane.style(side, '0px');
+             }
+           } else {
+             hidePanes.classed('shown', true).classed('hide', false).style(side, '0px').transition().duration(200).style(side, '-500px').on('end', function () {
+               select(this).classed('shown', false).classed('hide', true);
+             });

            }
            }

-           return true

          };
 
          };
 

-         /**
-          * @override
-          */
-         ArrayList.prototype.set = function set (index, element) {
-           var oldElement = this.array_[index];
-           this.array_[index] = element;
-           return oldElement
-         };
+         var _editMenu = uiEditMenu(context);

 
 

-         /**
-          * @override
-          */
-         ArrayList.prototype.iterator = function iterator () {
-           return new Iterator_(this)
+         ui.editMenu = function () {
+           return _editMenu;

          };
 
          };
 

-         /**
-          * @override
-          */
-         ArrayList.prototype.get = function get (index) {
-           if (index < 0 || index >= this.size()) {
-             throw new IndexOutOfBoundsException()
+         ui.showEditMenu = function (anchorPoint, triggerType, operations) {
+           // remove any displayed menu
+           ui.closeEditMenu();
+           if (!operations && context.mode().operations) operations = context.mode().operations();
+           if (!operations || !operations.length) return; // disable menu if in wide selection, for example
+
+           if (!context.map().editableDataEnabled()) return;
+           var surfaceNode = context.surface().node();
+
+           if (surfaceNode.focus) {
+             // FF doesn't support it
+             // focus the surface or else clicking off the menu may not trigger modeBrowse
+             surfaceNode.focus();

            }
 
            }
 

-           return this.array_[index]
-         };
+           operations.forEach(function (operation) {
+             if (operation.point) operation.point(anchorPoint);
+           });

 
 

-         /**
-          * @override
-          */
-         ArrayList.prototype.isEmpty = function isEmpty () {
-           return this.array_.length === 0
+           _editMenu.anchorLoc(anchorPoint).triggerType(triggerType).operations(operations); // render the menu
+
+
+           context.map().supersurface.call(_editMenu);

          };
 
          };
 

-         /**
-          * @override
-          */
-         ArrayList.prototype.size = function size () {
-           return this.array_.length
+         ui.closeEditMenu = function () {
+           // remove any existing menu no matter how it was added
+           context.map().supersurface.select('.edit-menu').remove();

          };
 
          };
 

-         /**
-          * @override
-          */
-         ArrayList.prototype.toArray = function toArray () {
-           var this$1 = this;
+         var _saveLoading = select(null);

 
 

-           var array = [];
+         context.uploader().on('saveStarted.ui', function () {
+           _saveLoading = uiLoading(context).message(_t.html('save.uploading')).blocking(true);
+           context.container().call(_saveLoading); // block input during upload
+         }).on('saveEnded.ui', function () {
+           _saveLoading.close();

 
 

-           for (var i = 0, len = this.array_.length; i < len; i++) {
-             array.push(this$1.array_[i]);
-           }
+           _saveLoading = select(null);
+         });
+         return ui;
+       }

 
 

-           return array
-         };
+       function coreContext() {
+         var _this = this;

 
 

-         /**
-          * @override
-          */
-         ArrayList.prototype.remove = function remove (o) {
-           var this$1 = this;
+         var dispatch = dispatch$8('enter', 'exit', 'change');
+         var context = utilRebind({}, dispatch, 'on');

 
 

-           var found = false;
+         var _deferred = new Set();

 
 

-           for (var i = 0, len = this.array_.length; i < len; i++) {
-             if (this$1.array_[i] === o) {
-               this$1.array_.splice(i, 1);
-               found = true;
-               break
-             }
-           }
+         context.version = '2.20.2';
+         context.privacyVersion = '20201202'; // iD will alter the hash so cache the parameters intended to setup the session
+
+         context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
+         context.isFirstSession = !corePreferences('sawSplash') && !corePreferences('sawPrivacyVersion');
+         /* Changeset */
+         // An osmChangeset object. Not loaded until needed.
+
+         context.changeset = null;
+         var _defaultChangesetComment = context.initialHashParams.comment;
+         var _defaultChangesetSource = context.initialHashParams.source;
+         var _defaultChangesetHashtags = context.initialHashParams.hashtags;

 
 

-           return found
+         context.defaultChangesetComment = function (val) {
+           if (!arguments.length) return _defaultChangesetComment;
+           _defaultChangesetComment = val;
+           return context;

          };
 
          };
 

-         return ArrayList;
-       }(List));
+         context.defaultChangesetSource = function (val) {
+           if (!arguments.length) return _defaultChangesetSource;
+           _defaultChangesetSource = val;
+           return context;
+         };

 
 

-       /**
-        * @extends {Iterator}
-        * @param {ArrayList} arrayList
-        * @constructor
-        * @private
-        */
-       var Iterator_ = (function (Iterator$$1) {
-         function Iterator_ (arrayList) {
-           Iterator$$1.call(this);
-           /**
-            * @type {ArrayList}
-            * @private
-           */
-           this.arrayList_ = arrayList;
-           /**
-            * @type {number}
-            * @private
-           */
-           this.position_ = 0;
-         }
+         context.defaultChangesetHashtags = function (val) {
+           if (!arguments.length) return _defaultChangesetHashtags;
+           _defaultChangesetHashtags = val;
+           return context;
+         };
+         /* Document title */
+
+         /* (typically shown as the label for the browser window/tab) */
+         // If true, iD will update the title based on what the user is doing

 
 

-         if ( Iterator$$1 ) { Iterator_.__proto__ = Iterator$$1; }
-         Iterator_.prototype = Object.create( Iterator$$1 && Iterator$$1.prototype );
-         Iterator_.prototype.constructor = Iterator_;

 
 

-         /**
-          * @override
-          */
-         Iterator_.prototype.next = function next () {
-           if (this.position_ === this.arrayList_.size()) {
-             throw new NoSuchElementException()
-           }
-           return this.arrayList_.get(this.position_++)
+         var _setsDocumentTitle = true;
+
+         context.setsDocumentTitle = function (val) {
+           if (!arguments.length) return _setsDocumentTitle;
+           _setsDocumentTitle = val;
+           return context;
+         }; // The part of the title that is always the same
+
+
+         var _documentTitleBase = document.title;
+
+         context.documentTitleBase = function (val) {
+           if (!arguments.length) return _documentTitleBase;
+           _documentTitleBase = val;
+           return context;

          };
          };

+         /* User interface and keybinding */

 
 

-         /**
-          * @override
-          */
-         Iterator_.prototype.hasNext = function hasNext () {
-           if (this.position_ < this.arrayList_.size()) {
-             return true
-           } else {
-             return false
-           }
+
+         var _ui;
+
+         context.ui = function () {
+           return _ui;

          };
 
          };
 

-         /**
-          * TODO: should be in ListIterator
-          * @override
-          */
-         Iterator_.prototype.set = function set (element) {
-           return this.arrayList_.set(this.position_ - 1, element)
+         context.lastPointerType = function () {
+           return _ui.lastPointerType();

          };
 
          };
 

-         /**
-          * @override
-          */
-         Iterator_.prototype.remove = function remove () {
-           this.arrayList_.remove(this.arrayList_.get(this.position_));
-         };
-
-         return Iterator_;
-       }(Iterator$1));
-
-       var CoordinateList = (function (ArrayList$$1) {
-         function CoordinateList () {
-           ArrayList$$1.call(this);
-           if (arguments.length === 0) ; else if (arguments.length === 1) {
-             var coord = arguments[0];
-             this.ensureCapacity(coord.length);
-             this.add(coord, true);
-           } else if (arguments.length === 2) {
-             var coord$1 = arguments[0];
-             var allowRepeated = arguments[1];
-             this.ensureCapacity(coord$1.length);
-             this.add(coord$1, allowRepeated);
-           }
-         }
-
-         if ( ArrayList$$1 ) { CoordinateList.__proto__ = ArrayList$$1; }
-         CoordinateList.prototype = Object.create( ArrayList$$1 && ArrayList$$1.prototype );
-         CoordinateList.prototype.constructor = CoordinateList;
-
-         var staticAccessors = { coordArrayType: { configurable: true } };
-         staticAccessors.coordArrayType.get = function () { return new Array(0).fill(null) };
-         CoordinateList.prototype.getCoordinate = function getCoordinate (i) {
-           return this.get(i)
-         };
-         CoordinateList.prototype.addAll = function addAll () {
-           var this$1 = this;
-
-           if (arguments.length === 2) {
-             var coll = arguments[0];
-             var allowRepeated = arguments[1];
-             var isChanged = false;
-             for (var i = coll.iterator(); i.hasNext();) {
-               this$1.add(i.next(), allowRepeated);
-               isChanged = true;
-             }
-             return isChanged
-           } else { return ArrayList$$1.prototype.addAll.apply(this, arguments) }
-         };
-         CoordinateList.prototype.clone = function clone () {
-           var this$1 = this;
-
-           var clone = ArrayList$$1.prototype.clone.call(this);
-           for (var i = 0; i < this.size(); i++) {
-             clone.add(i, this$1.get(i).copy());
-           }
-           return clone
-         };
-         CoordinateList.prototype.toCoordinateArray = function toCoordinateArray () {
-           return this.toArray(CoordinateList.coordArrayType)
-         };
-         CoordinateList.prototype.add = function add () {
-           var this$1 = this;
-
-           if (arguments.length === 1) {
-             var coord = arguments[0];
-             ArrayList$$1.prototype.add.call(this, coord);
-           } else if (arguments.length === 2) {
-             if (arguments[0] instanceof Array && typeof arguments[1] === 'boolean') {
-               var coord$1 = arguments[0];
-               var allowRepeated = arguments[1];
-               this.add(coord$1, allowRepeated, true);
-               return true
-             } else if (arguments[0] instanceof Coordinate && typeof arguments[1] === 'boolean') {
-               var coord$2 = arguments[0];
-               var allowRepeated$1 = arguments[1];
-               if (!allowRepeated$1) {
-                 if (this.size() >= 1) {
-                   var last = this.get(this.size() - 1);
-                   if (last.equals2D(coord$2)) { return null }
-                 }
-               }
-               ArrayList$$1.prototype.add.call(this, coord$2);
-             } else if (arguments[0] instanceof Object && typeof arguments[1] === 'boolean') {
-               var obj = arguments[0];
-               var allowRepeated$2 = arguments[1];
-               this.add(obj, allowRepeated$2);
-               return true
-             }
-           } else if (arguments.length === 3) {
-             if (typeof arguments[2] === 'boolean' && (arguments[0] instanceof Array && typeof arguments[1] === 'boolean')) {
-               var coord$3 = arguments[0];
-               var allowRepeated$3 = arguments[1];
-               var direction = arguments[2];
-               if (direction) {
-                 for (var i$1 = 0; i$1 < coord$3.length; i$1++) {
-                   this$1.add(coord$3[i$1], allowRepeated$3);
-                 }
-               } else {
-                 for (var i$2 = coord$3.length - 1; i$2 >= 0; i$2--) {
-                   this$1.add(coord$3[i$2], allowRepeated$3);
-                 }
-               }
-               return true
-             } else if (typeof arguments[2] === 'boolean' && (Number.isInteger(arguments[0]) && arguments[1] instanceof Coordinate)) {
-               var i$3 = arguments[0];
-               var coord$4 = arguments[1];
-               var allowRepeated$4 = arguments[2];
-               if (!allowRepeated$4) {
-                 var size = this.size();
-                 if (size > 0) {
-                   if (i$3 > 0) {
-                     var prev = this.get(i$3 - 1);
-                     if (prev.equals2D(coord$4)) { return null }
-                   }
-                   if (i$3 < size) {
-                     var next = this.get(i$3);
-                     if (next.equals2D(coord$4)) { return null }
-                   }
-                 }
-               }
-               ArrayList$$1.prototype.add.call(this, i$3, coord$4);
-             }
-           } else if (arguments.length === 4) {
-             var coord$5 = arguments[0];
-             var allowRepeated$5 = arguments[1];
-             var start = arguments[2];
-             var end = arguments[3];
-             var inc = 1;
-             if (start > end) { inc = -1; }
-             for (var i = start; i !== end; i += inc) {
-               this$1.add(coord$5[i], allowRepeated$5);
-             }
-             return true
-           }
+         var _keybinding = utilKeybinding('context');
+
+         context.keybinding = function () {
+           return _keybinding;

          };
          };

-         CoordinateList.prototype.closeRing = function closeRing () {
-           if (this.size() > 0) { this.add(new Coordinate(this.get(0)), false); }
+
+         select(document).call(_keybinding);
+         /* Straight accessors. Avoid using these if you can. */
+         // Instantiate the connection here because it doesn't require passing in
+         // `context` and it's needed for pre-init calls like `preauth`
+
+         var _connection = services.osm;
+
+         var _history;
+
+         var _validator;
+
+         var _uploader;
+
+         context.connection = function () {
+           return _connection;

          };
          };

-         CoordinateList.prototype.interfaces_ = function interfaces_ () {
-           return []
+
+         context.history = function () {
+           return _history;

          };
          };

-         CoordinateList.prototype.getClass = function getClass () {
-           return CoordinateList
+
+         context.validator = function () {
+           return _validator;

          };
 
          };
 

-         Object.defineProperties( CoordinateList, staticAccessors );
+         context.uploader = function () {
+           return _uploader;
+         };
+         /* Connection */

 
 

-         return CoordinateList;
-       }(ArrayList));

 
 

-       var CoordinateArrays = function CoordinateArrays () {};
+         context.preauth = function (options) {
+           if (_connection) {
+             _connection["switch"](options);
+           }

 
 

-       var staticAccessors$13 = { ForwardComparator: { configurable: true },BidirectionalComparator: { configurable: true },coordArrayType: { configurable: true } };
+           return context;
+         };
+         /* connection options for source switcher (optional) */

 
 

-       staticAccessors$13.ForwardComparator.get = function () { return ForwardComparator };
-       staticAccessors$13.BidirectionalComparator.get = function () { return BidirectionalComparator };
-       staticAccessors$13.coordArrayType.get = function () { return new Array(0).fill(null) };

 
 

-       CoordinateArrays.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       CoordinateArrays.prototype.getClass = function getClass () {
-         return CoordinateArrays
-       };
-       CoordinateArrays.isRing = function isRing (pts) {
-         if (pts.length < 4) { return false }
-         if (!pts[0].equals2D(pts[pts.length - 1])) { return false }
-         return true
-       };
-       CoordinateArrays.ptNotInList = function ptNotInList (testPts, pts) {
-         for (var i = 0; i < testPts.length; i++) {
-           var testPt = testPts[i];
-           if (CoordinateArrays.indexOf(testPt, pts) < 0) { return testPt }
-         }
-         return null
-       };
-       CoordinateArrays.scroll = function scroll (coordinates, firstCoordinate) {
-         var i = CoordinateArrays.indexOf(firstCoordinate, coordinates);
-         if (i < 0) { return null }
-         var newCoordinates = new Array(coordinates.length).fill(null);
-         System.arraycopy(coordinates, i, newCoordinates, 0, coordinates.length - i);
-         System.arraycopy(coordinates, 0, newCoordinates, coordinates.length - i, i);
-         System.arraycopy(newCoordinates, 0, coordinates, 0, coordinates.length);
-       };
-       CoordinateArrays.equals = function equals () {
-         if (arguments.length === 2) {
-           var coord1 = arguments[0];
-           var coord2 = arguments[1];
-           if (coord1 === coord2) { return true }
-           if (coord1 === null || coord2 === null) { return false }
-           if (coord1.length !== coord2.length) { return false }
-           for (var i = 0; i < coord1.length; i++) {
-             if (!coord1[i].equals(coord2[i])) { return false }
-           }
-           return true
-         } else if (arguments.length === 3) {
-           var coord1$1 = arguments[0];
-           var coord2$1 = arguments[1];
-           var coordinateComparator = arguments[2];
-           if (coord1$1 === coord2$1) { return true }
-           if (coord1$1 === null || coord2$1 === null) { return false }
-           if (coord1$1.length !== coord2$1.length) { return false }
-           for (var i$1 = 0; i$1 < coord1$1.length; i$1++) {
-             if (coordinateComparator.compare(coord1$1[i$1], coord2$1[i$1]) !== 0) { return false }
-           }
-           return true
-         }
-       };
-       CoordinateArrays.intersection = function intersection (coordinates, env) {
-         var coordList = new CoordinateList();
-         for (var i = 0; i < coordinates.length; i++) {
-           if (env.intersects(coordinates[i])) { coordList.add(coordinates[i], true); }
-         }
-         return coordList.toCoordinateArray()
-       };
-       CoordinateArrays.hasRepeatedPoints = function hasRepeatedPoints (coord) {
-         for (var i = 1; i < coord.length; i++) {
-           if (coord[i - 1].equals(coord[i])) {
-             return true
-           }
-         }
-         return false
-       };
-       CoordinateArrays.removeRepeatedPoints = function removeRepeatedPoints (coord) {
-         if (!CoordinateArrays.hasRepeatedPoints(coord)) { return coord }
-         var coordList = new CoordinateList(coord, false);
-         return coordList.toCoordinateArray()
-       };
-       CoordinateArrays.reverse = function reverse (coord) {
-         var last = coord.length - 1;
-         var mid = Math.trunc(last / 2);
-         for (var i = 0; i <= mid; i++) {
-           var tmp = coord[i];
-           coord[i] = coord[last - i];
-           coord[last - i] = tmp;
-         }
-       };
-       CoordinateArrays.removeNull = function removeNull (coord) {
-         var nonNull = 0;
-         for (var i = 0; i < coord.length; i++) {
-           if (coord[i] !== null) { nonNull++; }
-         }
-         var newCoord = new Array(nonNull).fill(null);
-         if (nonNull === 0) { return newCoord }
-         var j = 0;
-         for (var i$1 = 0; i$1 < coord.length; i$1++) {
-           if (coord[i$1] !== null) { newCoord[j++] = coord[i$1]; }
-         }
-         return newCoord
-       };
-       CoordinateArrays.copyDeep = function copyDeep () {
-         if (arguments.length === 1) {
-           var coordinates = arguments[0];
-           var copy = new Array(coordinates.length).fill(null);
-           for (var i = 0; i < coordinates.length; i++) {
-             copy[i] = new Coordinate(coordinates[i]);
-           }
-           return copy
-         } else if (arguments.length === 5) {
-           var src = arguments[0];
-           var srcStart = arguments[1];
-           var dest = arguments[2];
-           var destStart = arguments[3];
-           var length = arguments[4];
-           for (var i$1 = 0; i$1 < length; i$1++) {
-             dest[destStart + i$1] = new Coordinate(src[srcStart + i$1]);
-           }
-         }
-       };
-       CoordinateArrays.isEqualReversed = function isEqualReversed (pts1, pts2) {
-         for (var i = 0; i < pts1.length; i++) {
-           var p1 = pts1[i];
-           var p2 = pts2[pts1.length - i - 1];
-           if (p1.compareTo(p2) !== 0) { return false }
-         }
-         return true
-       };
-       CoordinateArrays.envelope = function envelope (coordinates) {
-         var env = new Envelope();
-         for (var i = 0; i < coordinates.length; i++) {
-           env.expandToInclude(coordinates[i]);
-         }
-         return env
-       };
-       CoordinateArrays.toCoordinateArray = function toCoordinateArray (coordList) {
-         return coordList.toArray(CoordinateArrays.coordArrayType)
-       };
-       CoordinateArrays.atLeastNCoordinatesOrNothing = function atLeastNCoordinatesOrNothing (n, c) {
-         return c.length >= n ? c : []
-       };
-       CoordinateArrays.indexOf = function indexOf (coordinate, coordinates) {
-         for (var i = 0; i < coordinates.length; i++) {
-           if (coordinate.equals(coordinates[i])) {
-             return i
-           }
-         }
-         return -1
-       };
-       CoordinateArrays.increasingDirection = function increasingDirection (pts) {
-         for (var i = 0; i < Math.trunc(pts.length / 2); i++) {
-           var j = pts.length - 1 - i;
-           var comp = pts[i].compareTo(pts[j]);
-           if (comp !== 0) { return comp }
-         }
-         return 1
-       };
-       CoordinateArrays.compare = function compare (pts1, pts2) {
-         var i = 0;
-         while (i < pts1.length && i < pts2.length) {
-           var compare = pts1[i].compareTo(pts2[i]);
-           if (compare !== 0) { return compare }
-           i++;
-         }
-         if (i < pts2.length) { return -1 }
-         if (i < pts1.length) { return 1 }
-         return 0
-       };
-       CoordinateArrays.minCoordinate = function minCoordinate (coordinates) {
-         var minCoord = null;
-         for (var i = 0; i < coordinates.length; i++) {
-           if (minCoord === null || minCoord.compareTo(coordinates[i]) > 0) {
-             minCoord = coordinates[i];
-           }
-         }
-         return minCoord
-       };
-       CoordinateArrays.extract = function extract (pts, start, end) {
-         start = MathUtil.clamp(start, 0, pts.length);
-         end = MathUtil.clamp(end, -1, pts.length);
-         var npts = end - start + 1;
-         if (end < 0) { npts = 0; }
-         if (start >= pts.length) { npts = 0; }
-         if (end < start) { npts = 0; }
-         var extractPts = new Array(npts).fill(null);
-         if (npts === 0) { return extractPts }
-         var iPts = 0;
-         for (var i = start; i <= end; i++) {
-           extractPts[iPts++] = pts[i];
-         }
-         return extractPts
-       };
+         var _apiConnections;

 
 

-       Object.defineProperties( CoordinateArrays, staticAccessors$13 );
+         context.apiConnections = function (val) {
+           if (!arguments.length) return _apiConnections;
+           _apiConnections = val;
+           return context;
+         }; // A string or array or locale codes to prefer over the browser's settings

 
 

-       var ForwardComparator = function ForwardComparator () {};

 
 

-       ForwardComparator.prototype.compare = function compare (o1, o2) {
-         var pts1 = o1;
-         var pts2 = o2;
-         return CoordinateArrays.compare(pts1, pts2)
-       };
-       ForwardComparator.prototype.interfaces_ = function interfaces_ () {
-         return [Comparator]
-       };
-       ForwardComparator.prototype.getClass = function getClass () {
-         return ForwardComparator
-       };
+         context.locale = function (locale) {
+           if (!arguments.length) return _mainLocalizer.localeCode();
+           _mainLocalizer.preferredLocaleCodes(locale);
+           return context;
+         };

 
 

-       var BidirectionalComparator = function BidirectionalComparator () {};
-
-       BidirectionalComparator.prototype.compare = function compare (o1, o2) {
-         var pts1 = o1;
-         var pts2 = o2;
-         if (pts1.length < pts2.length) { return -1 }
-         if (pts1.length > pts2.length) { return 1 }
-         if (pts1.length === 0) { return 0 }
-         var forwardComp = CoordinateArrays.compare(pts1, pts2);
-         var isEqualRev = CoordinateArrays.isEqualReversed(pts1, pts2);
-         if (isEqualRev) { return 0 }
-         return forwardComp
-       };
-       BidirectionalComparator.prototype.OLDcompare = function OLDcompare (o1, o2) {
-         var pts1 = o1;
-         var pts2 = o2;
-         if (pts1.length < pts2.length) { return -1 }
-         if (pts1.length > pts2.length) { return 1 }
-         if (pts1.length === 0) { return 0 }
-         var dir1 = CoordinateArrays.increasingDirection(pts1);
-         var dir2 = CoordinateArrays.increasingDirection(pts2);
-         var i1 = dir1 > 0 ? 0 : pts1.length - 1;
-         var i2 = dir2 > 0 ? 0 : pts1.length - 1;
-         for (var i = 0; i < pts1.length; i++) {
-           var comparePt = pts1[i1].compareTo(pts2[i2]);
-           if (comparePt !== 0) { return comparePt }
-           i1 += dir1;
-           i2 += dir2;
-         }
-         return 0
-       };
-       BidirectionalComparator.prototype.interfaces_ = function interfaces_ () {
-         return [Comparator]
-       };
-       BidirectionalComparator.prototype.getClass = function getClass () {
-         return BidirectionalComparator
-       };
+         function afterLoad(cid, callback) {
+           return function (err, result) {
+             if (err) {
+               // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
+               if (err.status === 400 || err.status === 401 || err.status === 403) {
+                 if (_connection) {
+                   _connection.logout();
+                 }
+               }

 
 

-       /**
-        * @see http://download.oracle.com/javase/6/docs/api/java/util/Map.html
-        *
-        * @constructor
-        * @private
-        */
-       var Map$1$1 = function Map () {};
+               if (typeof callback === 'function') {
+                 callback(err);
+               }

 
 

-       Map$1$1.prototype.get = function get () {};
-       /**
-        * Associates the specified value with the specified key in this map (optional
-        * operation).
-        * @param {Object} key
-        * @param {Object} value
-        * @return {Object}
-        */
-       Map$1$1.prototype.put = function put () {};
+               return;
+             } else if (_connection && _connection.getConnectionId() !== cid) {
+               if (typeof callback === 'function') {
+                 callback({
+                   message: 'Connection Switched',
+                   status: -1
+                 });
+               }

 
 

-       /**
-        * Returns the number of key-value mappings in this map.
-        * @return {number}
-        */
-       Map$1$1.prototype.size = function size () {};
+               return;
+             } else {
+               _history.merge(result.data, result.extent);

 
 

-       /**
-        * Returns a Collection view of the values contained in this map.
-        * @return {javascript.util.Collection}
-        */
-       Map$1$1.prototype.values = function values () {};
+               if (typeof callback === 'function') {
+                 callback(err, result);
+               }

 
 

-       /**
-        * Returns a {@link Set} view of the mappings contained in this map.
-        * The set is backed by the map, so changes to the map are
-        * reflected in the set, and vice-versa.If the map is modified
-        * while an iteration over the set is in progress (except through
-        * the iterator's own <tt>remove</tt> operation, or through the
-        * <tt>setValue</tt> operation on a map entry returned by the
-        * iterator) the results of the iteration are undefined.The set
-        * supports element removal, which removes the corresponding
-        * mapping from the map, via the <tt>Iterator.remove</tt>,
-        * <tt>Set.remove</tt>, <tt>removeAll</tt>, <tt>retainAll</tt> and
-        * <tt>clear</tt> operations.It does not support the
-        * <tt>add</tt> or <tt>addAll</tt> operations.
-        *
-        * @return {Set} a set view of the mappings contained in this map
-        */
-       Map$1$1.prototype.entrySet = function entrySet () {};
+               return;
+             }
+           };
+         }

 
 

-       /**
-        * @see http://download.oracle.com/javase/6/docs/api/java/util/SortedMap.html
-        *
-        * @extends {Map}
-        * @constructor
-        * @private
-        */
-       var SortedMap = (function (Map) {
-               function SortedMap () {
-                       Map.apply(this, arguments);
-               }if ( Map ) { SortedMap.__proto__ = Map; }
-               SortedMap.prototype = Object.create( Map && Map.prototype );
-               SortedMap.prototype.constructor = SortedMap;
+         context.loadTiles = function (projection, callback) {
+           var handle = window.requestIdleCallback(function () {
+             _deferred["delete"](handle);

 
 

-               
+             if (_connection && context.editableDataEnabled()) {
+               var cid = _connection.getConnectionId();

 
 

-               return SortedMap;
-       }(Map$1$1));
+               _connection.loadTiles(projection, afterLoad(cid, callback));
+             }
+           });

 
 

-       /**
-        * @param {string=} message Optional message
-        * @extends {Error}
-        * @constructor
-        * @private
-        */
-       function OperationNotSupported (message) {
-         this.message = message || '';
-       }
-       OperationNotSupported.prototype = new Error();
+           _deferred.add(handle);
+         };

 
 

-       /**
-        * @type {string}
-        */
-       OperationNotSupported.prototype.name = 'OperationNotSupported';
+         context.loadTileAtLoc = function (loc, callback) {
+           var handle = window.requestIdleCallback(function () {
+             _deferred["delete"](handle);

 
 

-       /**
-        * @see http://download.oracle.com/javase/6/docs/api/java/util/Set.html
-        *
-        * @extends {Collection}
-        * @constructor
-        * @private
-        */
-       function Set$2() {}
-       Set$2.prototype = new Collection();
+             if (_connection && context.editableDataEnabled()) {
+               var cid = _connection.getConnectionId();

 
 

+               _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
+             }
+           });

 
 

-       /**
-        * Returns true if this set contains the specified element. More formally,
-        * returns true if and only if this set contains an element e such that (o==null ?
-        * e==null : o.equals(e)).
-        * @param {Object} e
-        * @return {boolean}
-        */
-       Set$2.prototype.contains = function() {};
+           _deferred.add(handle);
+         }; // Download the full entity and its parent relations. The callback may be called multiple times.

 
 

-       /**
-        * @see http://docs.oracle.com/javase/6/docs/api/java/util/HashSet.html
-        *
-        * @extends {javascript.util.Set}
-        * @constructor
-        * @private
-        */
-       var HashSet = (function (Set$$1) {
-         function HashSet () {
-           Set$$1.call(this);
-           this.array_ = [];

 
 

-           if (arguments[0] instanceof Collection) {
-             this.addAll(arguments[0]);
-           }
-         }
+         context.loadEntity = function (entityID, callback) {
+           if (_connection) {
+             var cid = _connection.getConnectionId();

 
 

-         if ( Set$$1 ) { HashSet.__proto__ = Set$$1; }
-         HashSet.prototype = Object.create( Set$$1 && Set$$1.prototype );
-         HashSet.prototype.constructor = HashSet;
+             _connection.loadEntity(entityID, afterLoad(cid, callback)); // We need to fetch the parent relations separately.

 
 

-         /**
-          * @override
-          */
-         HashSet.prototype.contains = function contains (o) {
-           var this$1 = this;

 
 

-           for (var i = 0, len = this.array_.length; i < len; i++) {
-             var e = this$1.array_[i];
-             if (e === o) {
-               return true
-             }
+             _connection.loadEntityRelations(entityID, afterLoad(cid, callback));

            }
            }

-           return false

          };
 
          };
 

-         /**
-          * @override
-          */
-         HashSet.prototype.add = function add (o) {
-           if (this.contains(o)) {
-             return false
-           }
+         context.zoomToEntity = function (entityID, zoomTo) {
+           // be sure to load the entity even if we're not going to zoom to it
+           context.loadEntity(entityID, function (err, result) {
+             if (err) return;

 
 

-           this.array_.push(o);
+             if (zoomTo !== false) {
+               var entity = result.data.find(function (e) {
+                 return e.id === entityID;
+               });

 
 

-           return true
-         };
+               if (entity) {
+                 _map.zoomTo(entity);
+               }
+             }
+           });

 
 

-         /**
-          * @override
-          */
-         HashSet.prototype.addAll = function addAll (c) {
-           var this$1 = this;
+           _map.on('drawn.zoomToEntity', function () {
+             if (!context.hasEntity(entityID)) return;

 
 

-           for (var i = c.iterator(); i.hasNext();) {
-             this$1.add(i.next());
-           }
-           return true
-         };
+             _map.on('drawn.zoomToEntity', null);

 
 

-         /**
-          * @override
-          */
-         HashSet.prototype.remove = function remove (o) {
-           // throw new javascript.util.OperationNotSupported()
-           throw new Error()
-         };
+             context.on('enter.zoomToEntity', null);
+             context.enter(modeSelect(context, [entityID]));
+           });

 
 

-         /**
-          * @override
-          */
-         HashSet.prototype.size = function size () {
-           return this.array_.length
-         };
+           context.on('enter.zoomToEntity', function () {
+             if (_mode.id !== 'browse') {
+               _map.on('drawn.zoomToEntity', null);

 
 

-         /**
-          * @override
-          */
-         HashSet.prototype.isEmpty = function isEmpty () {
-           return this.array_.length === 0
+               context.on('enter.zoomToEntity', null);
+             }
+           });

          };
 
          };
 

-         /**
-          * @override
-          */
-         HashSet.prototype.toArray = function toArray () {
-           var this$1 = this;
+         var _minEditableZoom = 16;

 
 

-           var array = [];
+         context.minEditableZoom = function (val) {
+           if (!arguments.length) return _minEditableZoom;
+           _minEditableZoom = val;

 
 

-           for (var i = 0, len = this.array_.length; i < len; i++) {
-             array.push(this$1.array_[i]);
+           if (_connection) {
+             _connection.tileZoom(val);

            }
 
            }
 

-           return array
+           return context;
+         }; // String length limits in Unicode characters, not JavaScript UTF-16 code units
+
+
+         context.maxCharsForTagKey = function () {
+           return 255;

          };
 
          };
 

-         /**
-          * @override
-          */
-         HashSet.prototype.iterator = function iterator () {
-           return new Iterator_$1(this)
+         context.maxCharsForTagValue = function () {
+           return 255;

          };
 
          };
 

-         return HashSet;
-       }(Set$2));
+         context.maxCharsForRelationRole = function () {
+           return 255;
+         };

 
 

-       /**
-          * @extends {Iterator}
-          * @param {HashSet} hashSet
-          * @constructor
-          * @private
-          */
-       var Iterator_$1 = (function (Iterator$$1) {
-         function Iterator_ (hashSet) {
-           Iterator$$1.call(this);
-           /**
-            * @type {HashSet}
-            * @private
-            */
-           this.hashSet_ = hashSet;
-           /**
-            * @type {number}
-            * @private
-            */
-           this.position_ = 0;
-         }
+         function cleanOsmString(val, maxChars) {
+           // be lenient with input
+           if (val === undefined || val === null) {
+             val = '';
+           } else {
+             val = val.toString();
+           } // remove whitespace

 
 

-         if ( Iterator$$1 ) { Iterator_.__proto__ = Iterator$$1; }
-         Iterator_.prototype = Object.create( Iterator$$1 && Iterator$$1.prototype );
-         Iterator_.prototype.constructor = Iterator_;

 
 

-         /**
-          * @override
-          */
-         Iterator_.prototype.next = function next () {
-           if (this.position_ === this.hashSet_.size()) {
-             throw new NoSuchElementException()
-           }
-           return this.hashSet_.array_[this.position_++]
+           val = val.trim(); // use the canonical form of the string
+
+           if (val.normalize) val = val.normalize('NFC'); // trim to the number of allowed characters
+
+           return utilUnicodeCharsTruncated(val, maxChars);
+         }
+
+         context.cleanTagKey = function (val) {
+           return cleanOsmString(val, context.maxCharsForTagKey());

          };
 
          };
 

-         /**
-          * @override
-          */
-         Iterator_.prototype.hasNext = function hasNext () {
-           if (this.position_ < this.hashSet_.size()) {
-             return true
-           } else {
-             return false
-           }
+         context.cleanTagValue = function (val) {
+           return cleanOsmString(val, context.maxCharsForTagValue());

          };
 
          };
 

-         /**
-          * @override
-          */
-         Iterator_.prototype.remove = function remove () {
-           throw new OperationNotSupported()
+         context.cleanRelationRole = function (val) {
+           return cleanOsmString(val, context.maxCharsForRelationRole());

          };
          };

+         /* History */
+

 
 

-         return Iterator_;
-       }(Iterator$1));
+         var _inIntro = false;

 
 

-       var BLACK = 0;
-       var RED = 1;
-       function colorOf (p) { return (p === null ? BLACK : p.color) }
-       function parentOf (p) { return (p === null ? null : p.parent) }
-       function setColor (p, c) { if (p !== null) { p.color = c; } }
-       function leftOf (p) { return (p === null ? null : p.left) }
-       function rightOf (p) { return (p === null ? null : p.right) }
+         context.inIntro = function (val) {
+           if (!arguments.length) return _inIntro;
+           _inIntro = val;
+           return context;
+         }; // Immediately save the user's history to localstorage, if possible
+         // This is called someteimes, but also on the `window.onbeforeunload` handler

 
 

-       /**
-        * @see http://download.oracle.com/javase/6/docs/api/java/util/TreeMap.html
-        *
-        * @extends {SortedMap}
-        * @constructor
-        * @private
-        */
-       function TreeMap () {
-         /**
-          * @type {Object}
-          * @private
-          */
-         this.root_ = null;
-         /**
-          * @type {number}
-          * @private
-         */
-         this.size_ = 0;
-       }
-       TreeMap.prototype = new SortedMap();

 
 

-       /**
-        * @override
-        */
-       TreeMap.prototype.get = function (key) {
-         var p = this.root_;
-         while (p !== null) {
-           var cmp = key['compareTo'](p.key);
-           if (cmp < 0) { p = p.left; }
-           else if (cmp > 0) { p = p.right; }
-           else { return p.value }
-         }
-         return null
-       };
+         context.save = function () {
+           // no history save, no message onbeforeunload
+           if (_inIntro || context.container().select('.modal').size()) return;
+           var canSave;

 
 

-       /**
-        * @override
-        */
-       TreeMap.prototype.put = function (key, value) {
-         if (this.root_ === null) {
-           this.root_ = {
-             key: key,
-             value: value,
-             left: null,
-             right: null,
-             parent: null,
-             color: BLACK,
-             getValue: function getValue () { return this.value },
-             getKey: function getKey () { return this.key }
-           };
-           this.size_ = 1;
-           return null
-         }
-         var t = this.root_;
-         var parent;
-         var cmp;
-         do {
-           parent = t;
-           cmp = key['compareTo'](t.key);
-           if (cmp < 0) {
-             t = t.left;
-           } else if (cmp > 0) {
-             t = t.right;
-           } else {
-             var oldValue = t.value;
-             t.value = value;
-             return oldValue
-           }
-         } while (t !== null)
-         var e = {
-           key: key,
-           left: null,
-           right: null,
-           value: value,
-           parent: parent,
-           color: BLACK,
-           getValue: function getValue () { return this.value },
-           getKey: function getKey () { return this.key }
-         };
-         if (cmp < 0) {
-           parent.left = e;
-         } else {
-           parent.right = e;
-         }
-         this.fixAfterInsertion(e);
-         this.size_++;
-         return null
-       };
+           if (_mode && _mode.id === 'save') {
+             canSave = false; // Attempt to prevent user from creating duplicate changes - see #5200

 
 

-       /**
-        * @param {Object} x
-        */
-       TreeMap.prototype.fixAfterInsertion = function (x) {
-         var this$1 = this;
-
-         x.color = RED;
-         while (x != null && x !== this.root_ && x.parent.color === RED) {
-           if (parentOf(x) === leftOf(parentOf(parentOf(x)))) {
-             var y = rightOf(parentOf(parentOf(x)));
-             if (colorOf(y) === RED) {
-               setColor(parentOf(x), BLACK);
-               setColor(y, BLACK);
-               setColor(parentOf(parentOf(x)), RED);
-               x = parentOf(parentOf(x));
-             } else {
-               if (x === rightOf(parentOf(x))) {
-                 x = parentOf(x);
-                 this$1.rotateLeft(x);
-               }
-               setColor(parentOf(x), BLACK);
-               setColor(parentOf(parentOf(x)), RED);
-               this$1.rotateRight(parentOf(parentOf(x)));
+             if (services.osm && services.osm.isChangesetInflight()) {
+               _history.clearSaved();
+
+               return;

              }
            } else {
              }
            } else {

-             var y$1 = leftOf(parentOf(parentOf(x)));
-             if (colorOf(y$1) === RED) {
-               setColor(parentOf(x), BLACK);
-               setColor(y$1, BLACK);
-               setColor(parentOf(parentOf(x)), RED);
-               x = parentOf(parentOf(x));
-             } else {
-               if (x === leftOf(parentOf(x))) {
-                 x = parentOf(x);
-                 this$1.rotateRight(x);
-               }
-               setColor(parentOf(x), BLACK);
-               setColor(parentOf(parentOf(x)), RED);
-               this$1.rotateLeft(parentOf(parentOf(x)));
-             }
+             canSave = context.selectedIDs().every(function (id) {
+               var entity = context.hasEntity(id);
+               return entity && !entity.isDegenerate();
+             });

            }
            }

-         }
-         this.root_.color = BLACK;
-       };

 
 

-       /**
-        * @override
-        */
-       TreeMap.prototype.values = function () {
-         var arrayList = new ArrayList();
-         var p = this.getFirstEntry();
-         if (p !== null) {
-           arrayList.add(p.value);
-           while ((p = TreeMap.successor(p)) !== null) {
-             arrayList.add(p.value);
+           if (canSave) {
+             _history.save();

            }
            }

-         }
-         return arrayList
-       };

 
 

-       /**
-        * @override
-        */
-       TreeMap.prototype.entrySet = function () {
-         var hashSet = new HashSet();
-         var p = this.getFirstEntry();
-         if (p !== null) {
-           hashSet.add(p);
-           while ((p = TreeMap.successor(p)) !== null) {
-             hashSet.add(p);
+           if (_history.hasChanges()) {
+             return _t('save.unsaved_changes');

            }
            }

-         }
-         return hashSet
-       };
-
-       /**
-        * @param {Object} p
-        */
-       TreeMap.prototype.rotateLeft = function (p) {
-         if (p != null) {
-           var r = p.right;
-           p.right = r.left;
-           if (r.left != null) { r.left.parent = p; }
-           r.parent = p.parent;
-           if (p.parent === null) { this.root_ = r; } else if (p.parent.left === p) { p.parent.left = r; } else { p.parent.right = r; }
-           r.left = p;
-           p.parent = r;
-         }
-       };
+         }; // Debounce save, since it's a synchronous localStorage write,
+         // and history changes can happen frequently (e.g. when dragging).

 
 

-       /**
-        * @param {Object} p
-        */
-       TreeMap.prototype.rotateRight = function (p) {
-         if (p != null) {
-           var l = p.left;
-           p.left = l.right;
-           if (l.right != null) { l.right.parent = p; }
-           l.parent = p.parent;
-           if (p.parent === null) { this.root_ = l; } else if (p.parent.right === p) { p.parent.right = l; } else { p.parent.left = l; }
-           l.right = p;
-           p.parent = l;
-         }
-       };

 
 

-       /**
-        * @return {Object}
-        */
-       TreeMap.prototype.getFirstEntry = function () {
-         var p = this.root_;
-         if (p != null) {
-           while (p.left != null) {
-             p = p.left;
-           }
-         }
-         return p
-       };
+         context.debouncedSave = debounce(context.save, 350);

 
 

-       /**
-        * @param {Object} t
-        * @return {Object}
-        * @private
-        */
-       TreeMap.successor = function (t) {
-         if (t === null) { return null } else if (t.right !== null) {
-           var p = t.right;
-           while (p.left !== null) {
-             p = p.left;
-           }
-           return p
-         } else {
-           var p$1 = t.parent;
-           var ch = t;
-           while (p$1 !== null && ch === p$1.right) {
-             ch = p$1;
-             p$1 = p$1.parent;
-           }
-           return p$1
+         function withDebouncedSave(fn) {
+           return function () {
+             var result = fn.apply(_history, arguments);
+             context.debouncedSave();
+             return result;
+           };

          }
          }

-       };
+         /* Graph */

 
 

-       /**
-        * @override
-        */
-       TreeMap.prototype.size = function () {
-         return this.size_
-       };

 
 

-       var Lineal = function Lineal () {};
+         context.hasEntity = function (id) {
+           return _history.graph().hasEntity(id);
+         };

 
 

-       Lineal.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Lineal.prototype.getClass = function getClass () {
-         return Lineal
-       };
+         context.entity = function (id) {
+           return _history.graph().entity(id);
+         };
+         /* Modes */

 
 

-       /**
-        * @see http://download.oracle.com/javase/6/docs/api/java/util/SortedSet.html
-        *
-        * @extends {Set}
-        * @constructor
-        * @private
-        */
-       function SortedSet () {}
-       SortedSet.prototype = new Set$2();

 
 

-       // import Iterator from './Iterator'
-       /**
-        * @see http://download.oracle.com/javase/6/docs/api/java/util/TreeSet.html
-        *
-        * @extends {SortedSet}
-        * @constructor
-        * @private
-        */
-       function TreeSet () {
-         /**
-          * @type {Array}
-          * @private
-         */
-         this.array_ = [];
+         var _mode;

 
 

-         if (arguments[0] instanceof Collection) {
-           this.addAll(arguments[0]);
-         }
-       }
-       TreeSet.prototype = new SortedSet();
+         context.mode = function () {
+           return _mode;
+         };

 
 

-       /**
-        * @override
-        */
-       TreeSet.prototype.contains = function (o) {
-         var this$1 = this;
+         context.enter = function (newMode) {
+           if (_mode) {
+             _mode.exit();

 
 

-         for (var i = 0, len = this.array_.length; i < len; i++) {
-           var e = this$1.array_[i];
-           if (e['compareTo'](o) === 0) {
-             return true
+             dispatch.call('exit', _this, _mode);

            }
            }

-         }
-         return false
-       };
-
-       /**
-        * @override
-        */
-       TreeSet.prototype.add = function (o) {
-         var this$1 = this;

 
 

-         if (this.contains(o)) {
-           return false
-         }
+           _mode = newMode;

 
 

-         for (var i = 0, len = this.array_.length; i < len; i++) {
-           var e = this$1.array_[i];
-           if (e['compareTo'](o) === 1) {
-             this$1.array_.splice(i, 0, o);
-             return true
-           }
-         }
+           _mode.enter();

 
 

-         this.array_.push(o);
+           dispatch.call('enter', _this, _mode);
+         };

 
 

-         return true
-       };
+         context.selectedIDs = function () {
+           return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
+         };

 
 

-       /**
-        * @override
-        */
-       TreeSet.prototype.addAll = function (c) {
-         var this$1 = this;
+         context.activeID = function () {
+           return _mode && _mode.activeID && _mode.activeID();
+         };

 
 

-         for (var i = c.iterator(); i.hasNext();) {
-           this$1.add(i.next());
-         }
-         return true
-       };
+         var _selectedNoteID;

 
 

-       /**
-        * @override
-        */
-       TreeSet.prototype.remove = function (e) {
-         throw new OperationNotSupported()
-       };
+         context.selectedNoteID = function (noteID) {
+           if (!arguments.length) return _selectedNoteID;
+           _selectedNoteID = noteID;
+           return context;
+         }; // NOTE: Don't change the name of this until UI v3 is merged

 
 

-       /**
-        * @override
-        */
-       TreeSet.prototype.size = function () {
-         return this.array_.length
-       };

 
 

-       /**
-        * @override
-        */
-       TreeSet.prototype.isEmpty = function () {
-         return this.array_.length === 0
-       };
+         var _selectedErrorID;

 
 

-       /**
-        * @override
-        */
-       TreeSet.prototype.toArray = function () {
-         var this$1 = this;
+         context.selectedErrorID = function (errorID) {
+           if (!arguments.length) return _selectedErrorID;
+           _selectedErrorID = errorID;
+           return context;
+         };
+         /* Behaviors */

 
 

-         var array = [];

 
 

-         for (var i = 0, len = this.array_.length; i < len; i++) {
-           array.push(this$1.array_[i]);
-         }
+         context.install = function (behavior) {
+           return context.surface().call(behavior);
+         };

 
 

-         return array
-       };
+         context.uninstall = function (behavior) {
+           return context.surface().call(behavior.off);
+         };
+         /* Copy/Paste */

 
 

-       /**
-        * @override
-        */
-       TreeSet.prototype.iterator = function () {
-         return new Iterator_$2(this)
-       };

 
 

-       /**
-        * @extends {javascript.util.Iterator}
-        * @param {javascript.util.TreeSet} treeSet
-        * @constructor
-        * @private
-        */
-       var Iterator_$2 = function (treeSet) {
-         /**
-          * @type {javascript.util.TreeSet}
-          * @private
-          */
-         this.treeSet_ = treeSet;
-         /**
-          * @type {number}
-          * @private
-          */
-         this.position_ = 0;
-       };
+         var _copyGraph;

 
 

-       /**
-        * @override
-        */
-       Iterator_$2.prototype.next = function () {
-         if (this.position_ === this.treeSet_.size()) {
-           throw new NoSuchElementException()
-         }
-         return this.treeSet_.array_[this.position_++]
-       };
+         context.copyGraph = function () {
+           return _copyGraph;
+         };

 
 

-       /**
-        * @override
-        */
-       Iterator_$2.prototype.hasNext = function () {
-         if (this.position_ < this.treeSet_.size()) {
-           return true
-         } else {
-           return false
-         }
-       };
+         var _copyIDs = [];

 
 

-       /**
-        * @override
-        */
-       Iterator_$2.prototype.remove = function () {
-         throw new OperationNotSupported()
-       };
+         context.copyIDs = function (val) {
+           if (!arguments.length) return _copyIDs;
+           _copyIDs = val;
+           _copyGraph = _history.graph();
+           return context;
+         };

 
 

-       /**
-        * @see http://download.oracle.com/javase/6/docs/api/java/util/Arrays.html
-        *
-        * @constructor
-        * @private
-        */
-       var Arrays = function Arrays () {};
+         var _copyLonLat;

 
 

-       Arrays.sort = function sort () {
-         var a = arguments[0];
-         var i;
-         var t;
-         var comparator;
-         var compare;
-         if (arguments.length === 1) {
-           compare = function (a, b) {
-             return a.compareTo(b)
-           };
-           a.sort(compare);
-         } else if (arguments.length === 2) {
-           comparator = arguments[1];
-           compare = function (a, b) {
-             return comparator['compare'](a, b)
-           };
-           a.sort(compare);
-         } else if (arguments.length === 3) {
-           t = a.slice(arguments[1], arguments[2]);
-           t.sort();
-           var r = a.slice(0, arguments[1]).concat(t, a.slice(arguments[2], a.length));
-           a.splice(0, a.length);
-           for (i = 0; i < r.length; i++) {
-             a.push(r[i]);
-           }
-         } else if (arguments.length === 4) {
-           t = a.slice(arguments[1], arguments[2]);
-           comparator = arguments[3];
-           compare = function (a, b) {
-             return comparator['compare'](a, b)
-           };
-           t.sort(compare);
-           r = a.slice(0, arguments[1]).concat(t, a.slice(arguments[2], a.length));
-           a.splice(0, a.length);
-           for (i = 0; i < r.length; i++) {
-             a.push(r[i]);
-           }
-         }
-       };
-       /**
-        * @param {Array} array
-        * @return {ArrayList}
-        */
-       Arrays.asList = function asList (array) {
-         var arrayList = new ArrayList();
-         for (var i = 0, len = array.length; i < len; i++) {
-           arrayList.add(array[i]);
-         }
-         return arrayList
-       };
+         context.copyLonLat = function (val) {
+           if (!arguments.length) return _copyLonLat;
+           _copyLonLat = val;
+           return context;
+         };
+         /* Background */

 
 

-       var Dimension = function Dimension () {};
-
-       var staticAccessors$14 = { P: { configurable: true },L: { configurable: true },A: { configurable: true },FALSE: { configurable: true },TRUE: { configurable: true },DONTCARE: { configurable: true },SYM_FALSE: { configurable: true },SYM_TRUE: { configurable: true },SYM_DONTCARE: { configurable: true },SYM_P: { configurable: true },SYM_L: { configurable: true },SYM_A: { configurable: true } };
-
-       staticAccessors$14.P.get = function () { return 0 };
-       staticAccessors$14.L.get = function () { return 1 };
-       staticAccessors$14.A.get = function () { return 2 };
-       staticAccessors$14.FALSE.get = function () { return -1 };
-       staticAccessors$14.TRUE.get = function () { return -2 };
-       staticAccessors$14.DONTCARE.get = function () { return -3 };
-       staticAccessors$14.SYM_FALSE.get = function () { return 'F' };
-       staticAccessors$14.SYM_TRUE.get = function () { return 'T' };
-       staticAccessors$14.SYM_DONTCARE.get = function () { return '*' };
-       staticAccessors$14.SYM_P.get = function () { return '0' };
-       staticAccessors$14.SYM_L.get = function () { return '1' };
-       staticAccessors$14.SYM_A.get = function () { return '2' };
-
-       Dimension.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Dimension.prototype.getClass = function getClass () {
-         return Dimension
-       };
-       Dimension.toDimensionSymbol = function toDimensionSymbol (dimensionValue) {
-         switch (dimensionValue) {
-           case Dimension.FALSE:
-             return Dimension.SYM_FALSE
-           case Dimension.TRUE:
-             return Dimension.SYM_TRUE
-           case Dimension.DONTCARE:
-             return Dimension.SYM_DONTCARE
-           case Dimension.P:
-             return Dimension.SYM_P
-           case Dimension.L:
-             return Dimension.SYM_L
-           case Dimension.A:
-             return Dimension.SYM_A
-         }
-         throw new IllegalArgumentException('Unknown dimension value: ' + dimensionValue)
-       };
-       Dimension.toDimensionValue = function toDimensionValue (dimensionSymbol) {
-         switch (Character.toUpperCase(dimensionSymbol)) {
-           case Dimension.SYM_FALSE:
-             return Dimension.FALSE
-           case Dimension.SYM_TRUE:
-             return Dimension.TRUE
-           case Dimension.SYM_DONTCARE:
-             return Dimension.DONTCARE
-           case Dimension.SYM_P:
-             return Dimension.P
-           case Dimension.SYM_L:
-             return Dimension.L
-           case Dimension.SYM_A:
-             return Dimension.A
-         }
-         throw new IllegalArgumentException('Unknown dimension symbol: ' + dimensionSymbol)
-       };

 
 

-       Object.defineProperties( Dimension, staticAccessors$14 );
+         var _background;

 
 

-       var GeometryFilter = function GeometryFilter () {};
+         context.background = function () {
+           return _background;
+         };
+         /* Features */

 
 

-       GeometryFilter.prototype.filter = function filter (geom) {};
-       GeometryFilter.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       GeometryFilter.prototype.getClass = function getClass () {
-         return GeometryFilter
-       };

 
 

-       var CoordinateSequenceFilter = function CoordinateSequenceFilter () {};
+         var _features;

 
 

-       CoordinateSequenceFilter.prototype.filter = function filter (seq, i) {};
-       CoordinateSequenceFilter.prototype.isDone = function isDone () {};
-       CoordinateSequenceFilter.prototype.isGeometryChanged = function isGeometryChanged () {};
-       CoordinateSequenceFilter.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       CoordinateSequenceFilter.prototype.getClass = function getClass () {
-         return CoordinateSequenceFilter
-       };
+         context.features = function () {
+           return _features;
+         };

 
 

-       var GeometryCollection = (function (Geometry$$1) {
-         function GeometryCollection (geometries, factory) {
-           Geometry$$1.call(this, factory);
-           this._geometries = geometries || [];
+         context.hasHiddenConnections = function (id) {
+           var graph = _history.graph();

 
 

-           if (Geometry$$1.hasNullElements(this._geometries)) {
-             throw new IllegalArgumentException('geometries must not contain null elements')
-           }
-         }
+           var entity = graph.entity(id);
+           return _features.hasHiddenConnections(entity, graph);
+         };
+         /* Photos */

 
 

-         if ( Geometry$$1 ) { GeometryCollection.__proto__ = Geometry$$1; }
-         GeometryCollection.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-         GeometryCollection.prototype.constructor = GeometryCollection;

 
 

-         var staticAccessors = { serialVersionUID: { configurable: true } };
-         GeometryCollection.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-           var this$1 = this;
+         var _photos;

 
 

-           var envelope = new Envelope();
-           for (var i = 0; i < this._geometries.length; i++) {
-             envelope.expandToInclude(this$1._geometries[i].getEnvelopeInternal());
-           }
-           return envelope
-         };
-         GeometryCollection.prototype.getGeometryN = function getGeometryN (n) {
-           return this._geometries[n]
+         context.photos = function () {
+           return _photos;

          };
          };

-         GeometryCollection.prototype.getSortIndex = function getSortIndex () {
-           return Geometry$$1.SORTINDEX_GEOMETRYCOLLECTION
-         };
-         GeometryCollection.prototype.getCoordinates = function getCoordinates () {
-           var this$1 = this;
+         /* Map */

 
 

-           var coordinates = new Array(this.getNumPoints()).fill(null);
-           var k = -1;
-           for (var i = 0; i < this._geometries.length; i++) {
-             var childCoordinates = this$1._geometries[i].getCoordinates();
-             for (var j = 0; j < childCoordinates.length; j++) {
-               k++;
-               coordinates[k] = childCoordinates[j];
-             }
-           }
-           return coordinates
+
+         var _map;
+
+         context.map = function () {
+           return _map;

          };
          };

-         GeometryCollection.prototype.getArea = function getArea () {
-           var this$1 = this;

 
 

-           var area = 0.0;
-           for (var i = 0; i < this._geometries.length; i++) {
-             area += this$1._geometries[i].getArea();
-           }
-           return area
+         context.layers = function () {
+           return _map.layers();

          };
          };

-         GeometryCollection.prototype.equalsExact = function equalsExact () {
-           var this$1 = this;

 
 

-           if (arguments.length === 2) {
-             var other = arguments[0];
-             var tolerance = arguments[1];
-             if (!this.isEquivalentClass(other)) {
-               return false
-             }
-             var otherCollection = other;
-             if (this._geometries.length !== otherCollection._geometries.length) {
-               return false
-             }
-             for (var i = 0; i < this._geometries.length; i++) {
-               if (!this$1._geometries[i].equalsExact(otherCollection._geometries[i], tolerance)) {
-                 return false
-               }
-             }
-             return true
-           } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
+         context.surface = function () {
+           return _map.surface;

          };
          };

-         GeometryCollection.prototype.normalize = function normalize () {
-           var this$1 = this;

 
 

-           for (var i = 0; i < this._geometries.length; i++) {
-             this$1._geometries[i].normalize();
-           }
-           Arrays.sort(this._geometries);
+         context.editableDataEnabled = function () {
+           return _map.editableDataEnabled();

          };
          };

-         GeometryCollection.prototype.getCoordinate = function getCoordinate () {
-           if (this.isEmpty()) { return null }
-           return this._geometries[0].getCoordinate()
+
+         context.surfaceRect = function () {
+           return _map.surface.node().getBoundingClientRect();

          };
          };

-         GeometryCollection.prototype.getBoundaryDimension = function getBoundaryDimension () {
-           var this$1 = this;

 
 

-           var dimension = Dimension.FALSE;
-           for (var i = 0; i < this._geometries.length; i++) {
-             dimension = Math.max(dimension, this$1._geometries[i].getBoundaryDimension());
-           }
-           return dimension
+         context.editable = function () {
+           // don't allow editing during save
+           var mode = context.mode();
+           if (!mode || mode.id === 'save') return false;
+           return _map.editableDataEnabled();

          };
          };

-         GeometryCollection.prototype.getDimension = function getDimension () {
-           var this$1 = this;
+         /* Debug */
+
+
+         var _debugFlags = {
+           tile: false,
+           // tile boundaries
+           collision: false,
+           // label collision bounding boxes
+           imagery: false,
+           // imagery bounding polygons
+           target: false,
+           // touch targets
+           downloaded: false // downloaded data from osm

 
 

-           var dimension = Dimension.FALSE;
-           for (var i = 0; i < this._geometries.length; i++) {
-             dimension = Math.max(dimension, this$1._geometries[i].getDimension());
-           }
-           return dimension

          };
          };

-         GeometryCollection.prototype.getLength = function getLength () {
-           var this$1 = this;

 
 

-           var sum = 0.0;
-           for (var i = 0; i < this._geometries.length; i++) {
-             sum += this$1._geometries[i].getLength();
-           }
-           return sum
+         context.debugFlags = function () {
+           return _debugFlags;

          };
          };

-         GeometryCollection.prototype.getNumPoints = function getNumPoints () {
-           var this$1 = this;

 
 

-           var numPoints = 0;
-           for (var i = 0; i < this._geometries.length; i++) {
-             numPoints += this$1._geometries[i].getNumPoints();
-           }
-           return numPoints
+         context.getDebug = function (flag) {
+           return flag && _debugFlags[flag];

          };
          };

-         GeometryCollection.prototype.getNumGeometries = function getNumGeometries () {
-           return this._geometries.length
+
+         context.setDebug = function (flag, val) {
+           if (arguments.length === 1) val = true;
+           _debugFlags[flag] = val;
+           dispatch.call('change');
+           return context;

          };
          };

-         GeometryCollection.prototype.reverse = function reverse () {
-           var this$1 = this;
+         /* Container */

 
 

-           var n = this._geometries.length;
-           var revGeoms = new Array(n).fill(null);
-           for (var i = 0; i < this._geometries.length; i++) {
-             revGeoms[i] = this$1._geometries[i].reverse();
-           }
-           return this.getFactory().createGeometryCollection(revGeoms)
+
+         var _container = select(null);
+
+         context.container = function (val) {
+           if (!arguments.length) return _container;
+           _container = val;
+
+           _container.classed('ideditor', true);
+
+           return context;

          };
          };

-         GeometryCollection.prototype.compareToSameClass = function compareToSameClass () {
-           var this$1 = this;

 
 

-           if (arguments.length === 1) {
-             var o = arguments[0];
-             var theseElements = new TreeSet(Arrays.asList(this._geometries));
-             var otherElements = new TreeSet(Arrays.asList(o._geometries));
-             return this.compare(theseElements, otherElements)
-           } else if (arguments.length === 2) {
-             var o$1 = arguments[0];
-             var comp = arguments[1];
-             var gc = o$1;
-             var n1 = this.getNumGeometries();
-             var n2 = gc.getNumGeometries();
-             var i = 0;
-             while (i < n1 && i < n2) {
-               var thisGeom = this$1.getGeometryN(i);
-               var otherGeom = gc.getGeometryN(i);
-               var holeComp = thisGeom.compareToSameClass(otherGeom, comp);
-               if (holeComp !== 0) { return holeComp }
-               i++;
-             }
-             if (i < n1) { return 1 }
-             if (i < n2) { return -1 }
-             return 0
-           }
+         context.containerNode = function (val) {
+           if (!arguments.length) return context.container().node();
+           context.container(select(val));
+           return context;

          };
          };

-         GeometryCollection.prototype.apply = function apply () {
-           var this$1 = this;

 
 

-           if (hasInterface(arguments[0], CoordinateFilter)) {
-             var filter = arguments[0];
-             for (var i = 0; i < this._geometries.length; i++) {
-               this$1._geometries[i].apply(filter);
-             }
-           } else if (hasInterface(arguments[0], CoordinateSequenceFilter)) {
-             var filter$1 = arguments[0];
-             if (this._geometries.length === 0) { return null }
-             for (var i$1 = 0; i$1 < this._geometries.length; i$1++) {
-               this$1._geometries[i$1].apply(filter$1);
-               if (filter$1.isDone()) {
-                 break
-               }
-             }
-             if (filter$1.isGeometryChanged()) { this.geometryChanged(); }
-           } else if (hasInterface(arguments[0], GeometryFilter)) {
-             var filter$2 = arguments[0];
-             filter$2.filter(this);
-             for (var i$2 = 0; i$2 < this._geometries.length; i$2++) {
-               this$1._geometries[i$2].apply(filter$2);
-             }
-           } else if (hasInterface(arguments[0], GeometryComponentFilter)) {
-             var filter$3 = arguments[0];
-             filter$3.filter(this);
-             for (var i$3 = 0; i$3 < this._geometries.length; i$3++) {
-               this$1._geometries[i$3].apply(filter$3);
-             }
-           }
+         var _embed;
+
+         context.embed = function (val) {
+           if (!arguments.length) return _embed;
+           _embed = val;
+           return context;

          };
          };

-         GeometryCollection.prototype.getBoundary = function getBoundary () {
-           this.checkNotGeometryCollection(this);
-           Assert.shouldNeverReachHere();
-           return null
+         /* Assets */
+
+
+         var _assetPath = '';
+
+         context.assetPath = function (val) {
+           if (!arguments.length) return _assetPath;
+           _assetPath = val;
+           _mainFileFetcher.assetPath(val);
+           return context;

          };
          };

-         GeometryCollection.prototype.clone = function clone () {
-           var this$1 = this;

 
 

-           var gc = Geometry$$1.prototype.clone.call(this);
-           gc._geometries = new Array(this._geometries.length).fill(null);
-           for (var i = 0; i < this._geometries.length; i++) {
-             gc._geometries[i] = this$1._geometries[i].clone();
-           }
-           return gc
+         var _assetMap = {};
+
+         context.assetMap = function (val) {
+           if (!arguments.length) return _assetMap;
+           _assetMap = val;
+           _mainFileFetcher.assetMap(val);
+           return context;

          };
          };

-         GeometryCollection.prototype.getGeometryType = function getGeometryType () {
-           return 'GeometryCollection'
+
+         context.asset = function (val) {
+           if (/^http(s)?:\/\//i.test(val)) return val;
+           var filename = _assetPath + val;
+           return _assetMap[filename] || filename;

          };
          };

-         GeometryCollection.prototype.copy = function copy () {
-           var this$1 = this;

 
 

-           var geometries = new Array(this._geometries.length).fill(null);
-           for (var i = 0; i < geometries.length; i++) {
-             geometries[i] = this$1._geometries[i].copy();
-           }
-           return new GeometryCollection(geometries, this._factory)
+         context.imagePath = function (val) {
+           return context.asset("img/".concat(val));

          };
          };

-         GeometryCollection.prototype.isEmpty = function isEmpty () {
-           var this$1 = this;
+         /* reset (aka flush) */
+
+
+         context.reset = context.flush = function () {
+           context.debouncedSave.cancel();
+           Array.from(_deferred).forEach(function (handle) {
+             window.cancelIdleCallback(handle);

 
 

-           for (var i = 0; i < this._geometries.length; i++) {
-             if (!this$1._geometries[i].isEmpty()) {
-               return false
+             _deferred["delete"](handle);
+           });
+           Object.values(services).forEach(function (service) {
+             if (service && typeof service.reset === 'function') {
+               service.reset(context);

              }
              }

-           }
-           return true
-         };
-         GeometryCollection.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         GeometryCollection.prototype.getClass = function getClass () {
-           return GeometryCollection
-         };
-         staticAccessors.serialVersionUID.get = function () { return -5694727726395021467 };
+           });
+           context.changeset = null;

 
 

-         Object.defineProperties( GeometryCollection, staticAccessors );
+           _validator.reset();

 
 

-         return GeometryCollection;
-       }(Geometry));
+           _features.reset();

 
 

-       var MultiLineString = (function (GeometryCollection$$1) {
-         function MultiLineString () {
-           GeometryCollection$$1.apply(this, arguments);
-         }
+           _history.reset();

 
 

-         if ( GeometryCollection$$1 ) { MultiLineString.__proto__ = GeometryCollection$$1; }
-         MultiLineString.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-         MultiLineString.prototype.constructor = MultiLineString;
+           _uploader.reset(); // don't leave stale state in the inspector

 
 

-         var staticAccessors = { serialVersionUID: { configurable: true } };

 
 

-         MultiLineString.prototype.getSortIndex = function getSortIndex () {
-           return Geometry.SORTINDEX_MULTILINESTRING
+           context.container().select('.inspector-wrap *').remove();
+           return context;

          };
          };

-         MultiLineString.prototype.equalsExact = function equalsExact () {
-           if (arguments.length === 2) {
-             var other = arguments[0];
-             var tolerance = arguments[1];
-             if (!this.isEquivalentClass(other)) {
-               return false
+         /* Projections */
+
+
+         context.projection = geoRawMercator();
+         context.curtainProjection = geoRawMercator();
+         /* Init */
+
+         context.init = function () {
+           instantiateInternal();
+           initializeDependents();
+           return context; // Load variables and properties. No property of `context` should be accessed
+           // until this is complete since load statuses are indeterminate. The order
+           // of instantiation shouldn't matter.
+
+           function instantiateInternal() {
+             _history = coreHistory(context);
+             context.graph = _history.graph;
+             context.pauseChangeDispatch = _history.pauseChangeDispatch;
+             context.resumeChangeDispatch = _history.resumeChangeDispatch;
+             context.perform = withDebouncedSave(_history.perform);
+             context.replace = withDebouncedSave(_history.replace);
+             context.pop = withDebouncedSave(_history.pop);
+             context.overwrite = withDebouncedSave(_history.overwrite);
+             context.undo = withDebouncedSave(_history.undo);
+             context.redo = withDebouncedSave(_history.redo);
+             _validator = coreValidator(context);
+             _uploader = coreUploader(context);
+             _background = rendererBackground(context);
+             _features = rendererFeatures(context);
+             _map = rendererMap(context);
+             _photos = rendererPhotos(context);
+             _ui = uiInit(context);
+           } // Set up objects that might need to access properties of `context`. The order
+           // might matter if dependents make calls to each other. Be wary of async calls.
+
+
+           function initializeDependents() {
+             if (context.initialHashParams.presets) {
+               _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));

              }
              }

-             return GeometryCollection$$1.prototype.equalsExact.call(this, other, tolerance)
-           } else { return GeometryCollection$$1.prototype.equalsExact.apply(this, arguments) }
-         };
-         MultiLineString.prototype.getBoundaryDimension = function getBoundaryDimension () {
-           if (this.isClosed()) {
-             return Dimension.FALSE
-           }
-           return 0
-         };
-         MultiLineString.prototype.isClosed = function isClosed () {
-           var this$1 = this;

 
 

-           if (this.isEmpty()) {
-             return false
-           }
-           for (var i = 0; i < this._geometries.length; i++) {
-             if (!this$1._geometries[i].isClosed()) {
-               return false
+             if (context.initialHashParams.locale) {
+               _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
+             } // kick off some async work
+
+
+             _mainLocalizer.ensureLoaded();
+
+             _background.ensureLoaded();
+
+             _mainPresetIndex.ensureLoaded();
+             Object.values(services).forEach(function (service) {
+               if (service && typeof service.init === 'function') {
+                 service.init();
+               }
+             });
+
+             _map.init();
+
+             _validator.init();
+
+             _features.init();
+
+             if (services.maprules && context.initialHashParams.maprules) {
+               d3_json(context.initialHashParams.maprules).then(function (mapcss) {
+                 services.maprules.init();
+                 mapcss.forEach(function (mapcssSelector) {
+                   return services.maprules.addRule(mapcssSelector);
+                 });
+               })["catch"](function () {
+                 /* ignore */
+               });
+             } // if the container isn't available, e.g. when testing, don't load the UI
+
+
+             if (!context.container().empty()) {
+               _ui.ensureLoaded().then(function () {
+                 _photos.init();
+               });

              }
            }
              }
            }

-           return true
-         };
-         MultiLineString.prototype.getDimension = function getDimension () {
-           return 1

          };
          };

-         MultiLineString.prototype.reverse = function reverse () {
-           var this$1 = this;

 
 

-           var nLines = this._geometries.length;
-           var revLines = new Array(nLines).fill(null);
-           for (var i = 0; i < this._geometries.length; i++) {
-             revLines[nLines - 1 - i] = this$1._geometries[i].reverse();
-           }
-           return this.getFactory().createMultiLineString(revLines)
-         };
-         MultiLineString.prototype.getBoundary = function getBoundary () {
-           return new BoundaryOp(this).getBoundary()
-         };
-         MultiLineString.prototype.getGeometryType = function getGeometryType () {
-           return 'MultiLineString'
-         };
-         MultiLineString.prototype.copy = function copy () {
-           var this$1 = this;
+         return context;
+       }

 
 

-           var lineStrings = new Array(this._geometries.length).fill(null);
-           for (var i = 0; i < lineStrings.length; i++) {
-             lineStrings[i] = this$1._geometries[i].copy();
-           }
-           return new MultiLineString(lineStrings, this._factory)
-         };
-         MultiLineString.prototype.interfaces_ = function interfaces_ () {
-           return [Lineal]
-         };
-         MultiLineString.prototype.getClass = function getClass () {
-           return MultiLineString
-         };
-         staticAccessors.serialVersionUID.get = function () { return 8166665132445433741 };
+       // NSI contains the most correct tagging for many commonly mapped features.
+       // See https://github.com/osmlab/name-suggestion-index  and  https://nsi.guide
+       // DATA

 
 

-         Object.defineProperties( MultiLineString, staticAccessors );
+       var _nsiStatus = 'loading'; // 'loading', 'ok', 'failed'

 
 

-         return MultiLineString;
-       }(GeometryCollection));
+       var _nsi = {}; // Sometimes we can upgrade a feature tagged like `building=yes` to a better tag.

 
 

-       var BoundaryOp = function BoundaryOp () {
-         this._geom = null;
-         this._geomFact = null;
-         this._bnRule = null;
-         this._endpointMap = null;
-         if (arguments.length === 1) {
-           var geom = arguments[0];
-           var bnRule = BoundaryNodeRule.MOD2_BOUNDARY_RULE;
-           this._geom = geom;
-           this._geomFact = geom.getFactory();
-           this._bnRule = bnRule;
-         } else if (arguments.length === 2) {
-           var geom$1 = arguments[0];
-           var bnRule$1 = arguments[1];
-           this._geom = geom$1;
-           this._geomFact = geom$1.getFactory();
-           this._bnRule = bnRule$1;
-         }
-       };
-       BoundaryOp.prototype.boundaryMultiLineString = function boundaryMultiLineString (mLine) {
-         if (this._geom.isEmpty()) {
-           return this.getEmptyMultiPoint()
-         }
-         var bdyPts = this.computeBoundaryCoordinates(mLine);
-         if (bdyPts.length === 1) {
-           return this._geomFact.createPoint(bdyPts[0])
-         }
-         return this._geomFact.createMultiPointFromCoords(bdyPts)
-       };
-       BoundaryOp.prototype.getBoundary = function getBoundary () {
-         if (this._geom instanceof LineString) { return this.boundaryLineString(this._geom) }
-         if (this._geom instanceof MultiLineString) { return this.boundaryMultiLineString(this._geom) }
-         return this._geom.getBoundary()
-       };
-       BoundaryOp.prototype.boundaryLineString = function boundaryLineString (line) {
-         if (this._geom.isEmpty()) {
-           return this.getEmptyMultiPoint()
-         }
-         if (line.isClosed()) {
-           var closedEndpointOnBoundary = this._bnRule.isInBoundary(2);
-           if (closedEndpointOnBoundary) {
-             return line.getStartPoint()
-           } else {
-             return this._geomFact.createMultiPoint()
-           }
-         }
-         return this._geomFact.createMultiPoint([line.getStartPoint(), line.getEndPoint()])
-       };
-       BoundaryOp.prototype.getEmptyMultiPoint = function getEmptyMultiPoint () {
-         return this._geomFact.createMultiPoint()
-       };
-       BoundaryOp.prototype.computeBoundaryCoordinates = function computeBoundaryCoordinates (mLine) {
-           var this$1 = this;
-
-         var bdyPts = new ArrayList();
-         this._endpointMap = new TreeMap();
-         for (var i = 0; i < mLine.getNumGeometries(); i++) {
-           var line = mLine.getGeometryN(i);
-           if (line.getNumPoints() === 0) { continue }
-           this$1.addEndpoint(line.getCoordinateN(0));
-           this$1.addEndpoint(line.getCoordinateN(line.getNumPoints() - 1));
-         }
-         for (var it = this._endpointMap.entrySet().iterator(); it.hasNext();) {
-           var entry = it.next();
-           var counter = entry.getValue();
-           var valence = counter.count;
-           if (this$1._bnRule.isInBoundary(valence)) {
-             bdyPts.add(entry.getKey());
-           }
-         }
-         return CoordinateArrays.toCoordinateArray(bdyPts)
-       };
-       BoundaryOp.prototype.addEndpoint = function addEndpoint (pt) {
-         var counter = this._endpointMap.get(pt);
-         if (counter === null) {
-           counter = new Counter();
-           this._endpointMap.put(pt, counter);
-         }
-         counter.count++;
-       };
-       BoundaryOp.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       BoundaryOp.prototype.getClass = function getClass () {
-         return BoundaryOp
-       };
-       BoundaryOp.getBoundary = function getBoundary () {
-         if (arguments.length === 1) {
-           var g = arguments[0];
-           var bop = new BoundaryOp(g);
-           return bop.getBoundary()
-         } else if (arguments.length === 2) {
-           var g$1 = arguments[0];
-           var bnRule = arguments[1];
-           var bop$1 = new BoundaryOp(g$1, bnRule);
-           return bop$1.getBoundary()
-         }
-       };
+       var buildingPreset = {
+         'building/commercial': true,
+         'building/government': true,
+         'building/hotel': true,
+         'building/retail': true,
+         'building/office': true,
+         'building/supermarket': true,
+         'building/yes': true
+       }; // Exceptions to the namelike regexes.
+       // Usually a tag suffix contains a language code like `name:en`, `name:ru`
+       // but we want to exclude things like `operator:type`, `name:etymology`, etc..

 
 

-       var Counter = function Counter () {
-         this.count = null;
-       };
-       Counter.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Counter.prototype.getClass = function getClass () {
-         return Counter
-       };
+       var notNames = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // Exceptions to the branchlike regexes

 
 

-       // boundary
+       var notBranches = /(coop|express|wireless|factory|outlet)/i; // PRIVATE FUNCTIONS
+       // `setNsiSources()`
+       // Adds the sources to iD's filemap so we can start downloading data.
+       //

 
 

-       function PrintStream () {}
+       function setNsiSources() {
+         var nsiVersion = packageJSON.devDependencies['name-suggestion-index'];
+         var v = parseVersion(nsiVersion);
+         var vMinor = "".concat(v.major, ".").concat(v.minor);
+         var sources = {
+           'nsi_data': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/nsi.min.json"),
+           'nsi_dissolved': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/dissolved.min.json"),
+           'nsi_features': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/featureCollection.min.json"),
+           'nsi_generics': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/genericWords.min.json"),
+           'nsi_presets': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/presets/nsi-id-presets.min.json"),
+           'nsi_replacements': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/replacements.min.json"),
+           'nsi_trees': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/trees.min.json")
+         };
+         var fileMap = _mainFileFetcher.fileMap();
+
+         for (var k in sources) {
+           if (!fileMap[k]) fileMap[k] = sources[k];
+         }
+       } // `loadNsiPresets()`
+       //  Returns a Promise fulfilled when the presets have been downloaded and merged into iD.
+       //

 
 

-       function StringReader () {}

 
 

-       var DecimalFormat = function DecimalFormat () {};
+       function loadNsiPresets() {
+         return Promise.all([_mainFileFetcher.get('nsi_presets'), _mainFileFetcher.get('nsi_features')]).then(function (vals) {
+           // Add `suggestion=true` to all the nsi presets
+           // The preset json schema doesn't include it, but the iD code still uses it
+           Object.values(vals[0].presets).forEach(function (preset) {
+             return preset.suggestion = true;
+           });
+           _mainPresetIndex.merge({
+             presets: vals[0].presets,
+             featureCollection: vals[1]
+           });
+         });
+       } // `loadNsiData()`
+       //  Returns a Promise fulfilled when the other data have been downloaded and processed
+       //

 
 

-       function ByteArrayOutputStream () {}

 
 

-       function IOException () {}
+       function loadNsiData() {
+         return Promise.all([_mainFileFetcher.get('nsi_data'), _mainFileFetcher.get('nsi_dissolved'), _mainFileFetcher.get('nsi_replacements'), _mainFileFetcher.get('nsi_trees')]).then(function (vals) {
+           _nsi = {
+             data: vals[0].nsi,
+             // the raw name-suggestion-index data
+             dissolved: vals[1].dissolved,
+             // list of dissolved items
+             replacements: vals[2].replacements,
+             // trivial old->new qid replacements
+             trees: vals[3].trees,
+             // metadata about trees, main tags
+             kvt: new Map(),
+             // Map (k -> Map (v -> t) )
+             qids: new Map(),
+             // Map (wd/wp tag values -> qids)
+             ids: new Map() // Map (id -> NSI item)

 
 

-       function LineNumberReader () {}
+           };
+           _nsi.matcher = new Matcher();

 
 

-       var StringUtil = function StringUtil () {};
+           _nsi.matcher.buildMatchIndex(_nsi.data);

 
 

-       var staticAccessors$15 = { NEWLINE: { configurable: true },SIMPLE_ORDINATE_FORMAT: { configurable: true } };
+           _nsi.matcher.buildLocationIndex(_nsi.data, _mainLocations.loco());

 
 

-       StringUtil.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       StringUtil.prototype.getClass = function getClass () {
-         return StringUtil
-       };
-       StringUtil.chars = function chars (c, n) {
-         var ch = new Array(n).fill(null);
-         for (var i = 0; i < n; i++) {
-           ch[i] = c;
-         }
-         return String(ch)
-       };
-       StringUtil.getStackTrace = function getStackTrace () {
-         if (arguments.length === 1) {
-           var t = arguments[0];
-           var os = new ByteArrayOutputStream();
-           var ps = new PrintStream(os);
-           t.printStackTrace(ps);
-           return os.toString()
-         } else if (arguments.length === 2) {
-           var t$1 = arguments[0];
-           var depth = arguments[1];
-           var stackTrace = '';
-           var stringReader = new StringReader(StringUtil.getStackTrace(t$1));
-           var lineNumberReader = new LineNumberReader(stringReader);
-           for (var i = 0; i < depth; i++) {
-             try {
-               stackTrace += lineNumberReader.readLine() + StringUtil.NEWLINE;
-             } catch (e) {
-               if (e instanceof IOException) {
-                 Assert.shouldNeverReachHere();
-               } else { throw e }
-             } finally {}
-           }
-           return stackTrace
-         }
-       };
-       StringUtil.split = function split (s, separator) {
-         var separatorlen = separator.length;
-         var tokenList = new ArrayList();
-         var tmpString = '' + s;
-         var pos = tmpString.indexOf(separator);
-         while (pos >= 0) {
-           var token = tmpString.substring(0, pos);
-           tokenList.add(token);
-           tmpString = tmpString.substring(pos + separatorlen);
-           pos = tmpString.indexOf(separator);
-         }
-         if (tmpString.length > 0) { tokenList.add(tmpString); }
-         var res = new Array(tokenList.size()).fill(null);
-         for (var i = 0; i < res.length; i++) {
-           res[i] = tokenList.get(i);
-         }
-         return res
-       };
-       StringUtil.toString = function toString () {
-         if (arguments.length === 1) {
-           var d = arguments[0];
-           return StringUtil.SIMPLE_ORDINATE_FORMAT.format(d)
-         }
-       };
-       StringUtil.spaces = function spaces (n) {
-         return StringUtil.chars(' ', n)
-       };
-       staticAccessors$15.NEWLINE.get = function () { return System.getProperty('line.separator') };
-       staticAccessors$15.SIMPLE_ORDINATE_FORMAT.get = function () { return new DecimalFormat('0.#') };
+           Object.keys(_nsi.data).forEach(function (tkv) {
+             var category = _nsi.data[tkv];
+             var parts = tkv.split('/', 3); // tkv = "tree/key/value"

 
 

-       Object.defineProperties( StringUtil, staticAccessors$15 );
+             var t = parts[0];
+             var k = parts[1];
+             var v = parts[2]; // Build a reverse index of keys -> values -> trees present in the name-suggestion-index
+             // Collect primary keys  (e.g. "amenity", "craft", "shop", "man_made", "route", etc)
+             // "amenity": {
+             //   "restaurant": "brands"
+             // }

 
 

-       var CoordinateSequences = function CoordinateSequences () {};
+             var vmap = _nsi.kvt.get(k);

 
 

-       CoordinateSequences.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       CoordinateSequences.prototype.getClass = function getClass () {
-         return CoordinateSequences
-       };
-       CoordinateSequences.copyCoord = function copyCoord (src, srcPos, dest, destPos) {
-         var minDim = Math.min(src.getDimension(), dest.getDimension());
-         for (var dim = 0; dim < minDim; dim++) {
-           dest.setOrdinate(destPos, dim, src.getOrdinate(srcPos, dim));
-         }
-       };
-       CoordinateSequences.isRing = function isRing (seq) {
-         var n = seq.size();
-         if (n === 0) { return true }
-         if (n <= 3) { return false }
-         return seq.getOrdinate(0, CoordinateSequence.X) === seq.getOrdinate(n - 1, CoordinateSequence.X) && seq.getOrdinate(0, CoordinateSequence.Y) === seq.getOrdinate(n - 1, CoordinateSequence.Y)
-       };
-       CoordinateSequences.isEqual = function isEqual (cs1, cs2) {
-         var cs1Size = cs1.size();
-         var cs2Size = cs2.size();
-         if (cs1Size !== cs2Size) { return false }
-         var dim = Math.min(cs1.getDimension(), cs2.getDimension());
-         for (var i = 0; i < cs1Size; i++) {
-           for (var d = 0; d < dim; d++) {
-             var v1 = cs1.getOrdinate(i, d);
-             var v2 = cs2.getOrdinate(i, d);
-             if (cs1.getOrdinate(i, d) === cs2.getOrdinate(i, d)) { continue }
-             if (Double.isNaN(v1) && Double.isNaN(v2)) { continue }
-             return false
-           }
-         }
-         return true
-       };
-       CoordinateSequences.extend = function extend (fact, seq, size) {
-         var newseq = fact.create(size, seq.getDimension());
-         var n = seq.size();
-         CoordinateSequences.copy(seq, 0, newseq, 0, n);
-         if (n > 0) {
-           for (var i = n; i < size; i++) { CoordinateSequences.copy(seq, n - 1, newseq, i, 1); }
-         }
-         return newseq
-       };
-       CoordinateSequences.reverse = function reverse (seq) {
-         var last = seq.size() - 1;
-         var mid = Math.trunc(last / 2);
-         for (var i = 0; i <= mid; i++) {
-           CoordinateSequences.swap(seq, i, last - i);
-         }
-       };
-       CoordinateSequences.swap = function swap (seq, i, j) {
-         if (i === j) { return null }
-         for (var dim = 0; dim < seq.getDimension(); dim++) {
-           var tmp = seq.getOrdinate(i, dim);
-           seq.setOrdinate(i, dim, seq.getOrdinate(j, dim));
-           seq.setOrdinate(j, dim, tmp);
-         }
-       };
-       CoordinateSequences.copy = function copy (src, srcPos, dest, destPos, length) {
-         for (var i = 0; i < length; i++) {
-           CoordinateSequences.copyCoord(src, srcPos + i, dest, destPos + i);
-         }
-       };
-       CoordinateSequences.toString = function toString () {
-         if (arguments.length === 1) {
-           var cs = arguments[0];
-           var size = cs.size();
-           if (size === 0) { return '()' }
-           var dim = cs.getDimension();
-           var buf = new StringBuffer();
-           buf.append('(');
-           for (var i = 0; i < size; i++) {
-             if (i > 0) { buf.append(' '); }
-             for (var d = 0; d < dim; d++) {
-               if (d > 0) { buf.append(','); }
-               buf.append(StringUtil.toString(cs.getOrdinate(i, d)));
-             }
-           }
-           buf.append(')');
-           return buf.toString()
-         }
-       };
-       CoordinateSequences.ensureValidRing = function ensureValidRing (fact, seq) {
-         var n = seq.size();
-         if (n === 0) { return seq }
-         if (n <= 3) { return CoordinateSequences.createClosedRing(fact, seq, 4) }
-         var isClosed = seq.getOrdinate(0, CoordinateSequence.X) === seq.getOrdinate(n - 1, CoordinateSequence.X) && seq.getOrdinate(0, CoordinateSequence.Y) === seq.getOrdinate(n - 1, CoordinateSequence.Y);
-         if (isClosed) { return seq }
-         return CoordinateSequences.createClosedRing(fact, seq, n + 1)
-       };
-       CoordinateSequences.createClosedRing = function createClosedRing (fact, seq, size) {
-         var newseq = fact.create(size, seq.getDimension());
-         var n = seq.size();
-         CoordinateSequences.copy(seq, 0, newseq, 0, n);
-         for (var i = n; i < size; i++) { CoordinateSequences.copy(seq, 0, newseq, i, 1); }
-         return newseq
-       };
+             if (!vmap) {
+               vmap = new Map();

 
 

-       var LineString = (function (Geometry$$1) {
-         function LineString (points, factory) {
-           Geometry$$1.call(this, factory);
-           this._points = null;
-           this.init(points);
-         }
+               _nsi.kvt.set(k, vmap);
+             }

 
 

-         if ( Geometry$$1 ) { LineString.__proto__ = Geometry$$1; }
-         LineString.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-         LineString.prototype.constructor = LineString;
+             vmap.set(v, t);
+             var tree = _nsi.trees[t]; // e.g. "brands", "operators"

 
 

-         var staticAccessors = { serialVersionUID: { configurable: true } };
-         LineString.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-           if (this.isEmpty()) {
-             return new Envelope()
-           }
-           return this._points.expandEnvelope(new Envelope())
-         };
-         LineString.prototype.isRing = function isRing () {
-           return this.isClosed() && this.isSimple()
-         };
-         LineString.prototype.getSortIndex = function getSortIndex () {
-           return Geometry$$1.SORTINDEX_LINESTRING
-         };
-         LineString.prototype.getCoordinates = function getCoordinates () {
-           return this._points.toCoordinateArray()
-         };
-         LineString.prototype.equalsExact = function equalsExact () {
-           var this$1 = this;
+             var mainTag = tree.mainTag; // e.g. "brand:wikidata", "operator:wikidata", etc

 
 

-           if (arguments.length === 2) {
-             var other = arguments[0];
-             var tolerance = arguments[1];
-             if (!this.isEquivalentClass(other)) {
-               return false
-             }
-             var otherLineString = other;
-             if (this._points.size() !== otherLineString._points.size()) {
-               return false
-             }
-             for (var i = 0; i < this._points.size(); i++) {
-               if (!this$1.equal(this$1._points.getCoordinate(i), otherLineString._points.getCoordinate(i), tolerance)) {
-                 return false
-               }
-             }
-             return true
-           } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-         };
-         LineString.prototype.normalize = function normalize () {
-           var this$1 = this;
+             var items = category.items || [];
+             items.forEach(function (item) {
+               // Remember some useful things for later, cache NSI id -> item
+               item.tkv = tkv;
+               item.mainTag = mainTag;

 
 

-           for (var i = 0; i < Math.trunc(this._points.size() / 2); i++) {
-             var j = this$1._points.size() - 1 - i;
-             if (!this$1._points.getCoordinate(i).equals(this$1._points.getCoordinate(j))) {
-               if (this$1._points.getCoordinate(i).compareTo(this$1._points.getCoordinate(j)) > 0) {
-                 CoordinateSequences.reverse(this$1._points);
-               }
-               return null
-             }
-           }
-         };
-         LineString.prototype.getCoordinate = function getCoordinate () {
-           if (this.isEmpty()) { return null }
-           return this._points.getCoordinate(0)
-         };
-         LineString.prototype.getBoundaryDimension = function getBoundaryDimension () {
-           if (this.isClosed()) {
-             return Dimension.FALSE
-           }
-           return 0
-         };
-         LineString.prototype.isClosed = function isClosed () {
-           if (this.isEmpty()) {
-             return false
-           }
-           return this.getCoordinateN(0).equals2D(this.getCoordinateN(this.getNumPoints() - 1))
-         };
-         LineString.prototype.getEndPoint = function getEndPoint () {
-           if (this.isEmpty()) {
-             return null
-           }
-           return this.getPointN(this.getNumPoints() - 1)
-         };
-         LineString.prototype.getDimension = function getDimension () {
-           return 1
-         };
-         LineString.prototype.getLength = function getLength () {
-           return CGAlgorithms.computeLength(this._points)
-         };
-         LineString.prototype.getNumPoints = function getNumPoints () {
-           return this._points.size()
-         };
-         LineString.prototype.reverse = function reverse () {
-           var seq = this._points.copy();
-           CoordinateSequences.reverse(seq);
-           var revLine = this.getFactory().createLineString(seq);
-           return revLine
-         };
-         LineString.prototype.compareToSameClass = function compareToSameClass () {
-           var this$1 = this;
+               _nsi.ids.set(item.id, item); // Cache Wikidata/Wikipedia values -> qid, for #6416

 
 

-           if (arguments.length === 1) {
-             var o = arguments[0];
-             var line = o;
-             var i = 0;
-             var j = 0;
-             while (i < this._points.size() && j < line._points.size()) {
-               var comparison = this$1._points.getCoordinate(i).compareTo(line._points.getCoordinate(j));
-               if (comparison !== 0) {
-                 return comparison
-               }
-               i++;
-               j++;
-             }
-             if (i < this._points.size()) {
-               return 1
-             }
-             if (j < line._points.size()) {
-               return -1
-             }
-             return 0
-           } else if (arguments.length === 2) {
-             var o$1 = arguments[0];
-             var comp = arguments[1];
-             var line$1 = o$1;
-             return comp.compare(this._points, line$1._points)
-           }
-         };
-         LineString.prototype.apply = function apply () {
-           var this$1 = this;

 
 

-           if (hasInterface(arguments[0], CoordinateFilter)) {
-             var filter = arguments[0];
-             for (var i = 0; i < this._points.size(); i++) {
-               filter.filter(this$1._points.getCoordinate(i));
-             }
-           } else if (hasInterface(arguments[0], CoordinateSequenceFilter)) {
-             var filter$1 = arguments[0];
-             if (this._points.size() === 0) { return null }
-             for (var i$1 = 0; i$1 < this._points.size(); i$1++) {
-               filter$1.filter(this$1._points, i$1);
-               if (filter$1.isDone()) { break }
-             }
-             if (filter$1.isGeometryChanged()) { this.geometryChanged(); }
-           } else if (hasInterface(arguments[0], GeometryFilter)) {
-             var filter$2 = arguments[0];
-             filter$2.filter(this);
-           } else if (hasInterface(arguments[0], GeometryComponentFilter)) {
-             var filter$3 = arguments[0];
-             filter$3.filter(this);
-           }
-         };
-         LineString.prototype.getBoundary = function getBoundary () {
-           return new BoundaryOp(this).getBoundary()
-         };
-         LineString.prototype.isEquivalentClass = function isEquivalentClass (other) {
-           return other instanceof LineString
-         };
-         LineString.prototype.clone = function clone () {
-           var ls = Geometry$$1.prototype.clone.call(this);
-           ls._points = this._points.clone();
-           return ls
-         };
-         LineString.prototype.getCoordinateN = function getCoordinateN (n) {
-           return this._points.getCoordinate(n)
-         };
-         LineString.prototype.getGeometryType = function getGeometryType () {
-           return 'LineString'
-         };
-         LineString.prototype.copy = function copy () {
-           return new LineString(this._points.copy(), this._factory)
-         };
-         LineString.prototype.getCoordinateSequence = function getCoordinateSequence () {
-           return this._points
-         };
-         LineString.prototype.isEmpty = function isEmpty () {
-           return this._points.size() === 0
-         };
-         LineString.prototype.init = function init (points) {
-           if (points === null) {
-             points = this.getFactory().getCoordinateSequenceFactory().create([]);
-           }
-           if (points.size() === 1) {
-             throw new IllegalArgumentException('Invalid number of points in LineString (found ' + points.size() + ' - must be 0 or >= 2)')
-           }
-           this._points = points;
-         };
-         LineString.prototype.isCoordinate = function isCoordinate (pt) {
-           var this$1 = this;
+               var wd = item.tags[mainTag];
+               var wp = item.tags[mainTag.replace('wikidata', 'wikipedia')];
+               if (wd) _nsi.qids.set(wd, wd);
+               if (wp && wd) _nsi.qids.set(wp, wd);
+             });
+           });
+         });
+       } // `gatherKVs()`
+       // Gather all the k/v pairs that we will run through the NSI matcher.
+       // An OSM tags object can contain anything, but only a few tags will be interesting to NSI.
+       //
+       // This function will return the interesting tag pairs like:
+       //   "amenity/restaurant", "man_made/flagpole"
+       // and fallbacks like
+       //   "amenity/yes"
+       // excluding things like
+       //   "tiger:reviewed", "surface", "ref", etc.
+       //
+       // Arguments
+       //   `tags`: `Object` containing the feature's OSM tags
+       // Returns
+       //   `Object` containing kv pairs to test:
+       //   {
+       //     'primary': Set(),
+       //     'alternate': Set()
+       //   }
+       //

 
 

-           for (var i = 0; i < this._points.size(); i++) {
-             if (this$1._points.getCoordinate(i).equals(pt)) {
-               return true
-             }
+
+       function gatherKVs(tags) {
+         var primary = new Set();
+         var alternate = new Set();
+         Object.keys(tags).forEach(function (osmkey) {
+           var osmvalue = tags[osmkey];
+           if (!osmvalue) return; // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
+
+           if (osmkey === 'route_master') osmkey = 'route';
+
+           var vmap = _nsi.kvt.get(osmkey);
+
+           if (!vmap) return; // not an interesting key
+
+           if (vmap.get(osmvalue)) {
+             // Matched a category in NSI
+             primary.add("".concat(osmkey, "/").concat(osmvalue)); // interesting key/value
+           } else if (osmvalue === 'yes') {
+             alternate.add("".concat(osmkey, "/").concat(osmvalue)); // fallback key/yes

            }
            }

-           return false
+         }); // Can we try a generic building fallback match? - See #6122, #7197
+         // Only try this if we do a preset match and find nothing else remarkable about that building.
+         // For example, a way with `building=yes` + `name=Westfield` may be a Westfield department store.
+         // But a way with `building=yes` + `name=Westfield` + `public_transport=station` is a train station for a town named "Westfield"
+
+         var preset = _mainPresetIndex.matchTags(tags, 'area');
+
+         if (buildingPreset[preset.id]) {
+           alternate.add('building/yes');
+         }
+
+         return {
+           primary: primary,
+           alternate: alternate

          };
          };

-         LineString.prototype.getStartPoint = function getStartPoint () {
-           if (this.isEmpty()) {
-             return null
+       } // `identifyTree()`
+       // NSI has a concept of trees: "brands", "operators", "flags", "transit".
+       // The tree determines things like which tags are namelike, and which tags hold important wikidata.
+       // This takes an Object of tags and tries to identify what tree to use.
+       //
+       // Arguments
+       //   `tags`: `Object` containing the feature's OSM tags
+       // Returns
+       //   `string` the name of the tree if known
+       //   or 'unknown' if it could match several trees (e.g. amenity/yes)
+       //   or null if no match
+       //
+
+
+       function identifyTree(tags) {
+         var unknown;
+         var t; // Check all tags
+
+         Object.keys(tags).forEach(function (osmkey) {
+           if (t) return; // found already
+
+           var osmvalue = tags[osmkey];
+           if (!osmvalue) return; // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
+
+           if (osmkey === 'route_master') osmkey = 'route';
+
+           var vmap = _nsi.kvt.get(osmkey);
+
+           if (!vmap) return; // this key is not in nsi
+
+           if (osmvalue === 'yes') {
+             unknown = 'unknown';
+           } else {
+             t = vmap.get(osmvalue);

            }
            }

-           return this.getPointN(0)
-         };
-         LineString.prototype.getPointN = function getPointN (n) {
-           return this.getFactory().createPoint(this._points.getCoordinate(n))
-         };
-         LineString.prototype.interfaces_ = function interfaces_ () {
-           return [Lineal]
-         };
-         LineString.prototype.getClass = function getClass () {
-           return LineString
+         });
+         return t || unknown || null;
+       } // `gatherNames()`
+       // Gather all the namelike values that we will run through the NSI matcher.
+       // It will gather values primarily from tags `name`, `name:ru`, `flag:name`
+       //  and fallback to alternate tags like `brand`, `brand:ru`, `alt_name`
+       //
+       // Arguments
+       //   `tags`: `Object` containing the feature's OSM tags
+       // Returns
+       //   `Object` containing namelike values to test:
+       //   {
+       //     'primary': Set(),
+       //     'fallbacks': Set()
+       //   }
+       //
+
+
+       function gatherNames(tags) {
+         var empty = {
+           primary: new Set(),
+           alternate: new Set()

          };
          };

-         staticAccessors.serialVersionUID.get = function () { return 3110669828065365560 };
+         var primary = new Set();
+         var alternate = new Set();
+         var foundSemi = false;
+         var testNameFragments = false;
+         var patterns; // Patterns for matching OSM keys that might contain namelike values.
+         // These roughly correspond to the "trees" concept in name-suggestion-index,

 
 

-         Object.defineProperties( LineString, staticAccessors );
+         var t = identifyTree(tags);
+         if (!t) return empty;

 
 

-         return LineString;
-       }(Geometry));
+         if (t === 'transit') {
+           patterns = {
+             primary: /^network$/i,
+             alternate: /^(operator|operator:\w+|network:\w+|\w+_name|\w+_name:\w+)$/i
+           };
+         } else if (t === 'flags') {
+           patterns = {
+             primary: /^(flag:name|flag:name:\w+)$/i,
+             alternate: /^(flag|flag:\w+|subject|subject:\w+)$/i // note: no `country`, we special-case it below

 
 

-       var Puntal = function Puntal () {};
+           };
+         } else if (t === 'brands') {
+           testNameFragments = true;
+           patterns = {
+             primary: /^(name|name:\w+)$/i,
+             alternate: /^(brand|brand:\w+|operator|operator:\w+|\w+_name|\w+_name:\w+)/i
+           };
+         } else if (t === 'operators') {
+           testNameFragments = true;
+           patterns = {
+             primary: /^(name|name:\w+|operator|operator:\w+)$/i,
+             alternate: /^(brand|brand:\w+|\w+_name|\w+_name:\w+)/i
+           };
+         } else {
+           // unknown/multiple
+           testNameFragments = true;
+           patterns = {
+             primary: /^(name|name:\w+)$/i,
+             alternate: /^(brand|brand:\w+|network|network:\w+|operator|operator:\w+|\w+_name|\w+_name:\w+)/i
+           };
+         } // Test `name` fragments, longest to shortest, to fit them into a "Name Branch" pattern.
+         // e.g. "TUI ReiseCenter - Neuss Innenstadt" -> ["TUI", "ReiseCenter", "Neuss", "Innenstadt"]

 
 

-       Puntal.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Puntal.prototype.getClass = function getClass () {
-         return Puntal
-       };

 
 

-       var Point$1 = (function (Geometry$$1) {
-         function Point (coordinates, factory) {
-           Geometry$$1.call(this, factory);
-           this._coordinates = coordinates || null;
-           this.init(this._coordinates);
-         }
+         if (tags.name && testNameFragments) {
+           var nameParts = tags.name.split(/[\s\-\/,.]/);

 
 

-         if ( Geometry$$1 ) { Point.__proto__ = Geometry$$1; }
-         Point.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-         Point.prototype.constructor = Point;
+           for (var split = nameParts.length; split > 0; split--) {
+             var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"

 
 

-         var staticAccessors = { serialVersionUID: { configurable: true } };
-         Point.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-           if (this.isEmpty()) {
-             return new Envelope()
+             primary.add(name);

            }
            }

-           var env = new Envelope();
-           env.expandToInclude(this._coordinates.getX(0), this._coordinates.getY(0));
-           return env
-         };
-         Point.prototype.getSortIndex = function getSortIndex () {
-           return Geometry$$1.SORTINDEX_POINT
-         };
-         Point.prototype.getCoordinates = function getCoordinates () {
-           return this.isEmpty() ? [] : [this.getCoordinate()]
-         };
-         Point.prototype.equalsExact = function equalsExact () {
-           if (arguments.length === 2) {
-             var other = arguments[0];
-             var tolerance = arguments[1];
-             if (!this.isEquivalentClass(other)) {
-               return false
-             }
-             if (this.isEmpty() && other.isEmpty()) {
-               return true
-             }
-             if (this.isEmpty() !== other.isEmpty()) {
-               return false
+         } // Check all tags
+
+
+         Object.keys(tags).forEach(function (osmkey) {
+           var osmvalue = tags[osmkey];
+           if (!osmvalue) return;
+
+           if (isNamelike(osmkey, 'primary')) {
+             if (/;/.test(osmvalue)) {
+               foundSemi = true;
+             } else {
+               primary.add(osmvalue);
+               alternate["delete"](osmvalue);

              }
              }

-             return this.equal(other.getCoordinate(), this.getCoordinate(), tolerance)
-           } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-         };
-         Point.prototype.normalize = function normalize () {};
-         Point.prototype.getCoordinate = function getCoordinate () {
-           return this._coordinates.size() !== 0 ? this._coordinates.getCoordinate(0) : null
-         };
-         Point.prototype.getBoundaryDimension = function getBoundaryDimension () {
-           return Dimension.FALSE
-         };
-         Point.prototype.getDimension = function getDimension () {
-           return 0
-         };
-         Point.prototype.getNumPoints = function getNumPoints () {
-           return this.isEmpty() ? 0 : 1
-         };
-         Point.prototype.reverse = function reverse () {
-           return this.copy()
-         };
-         Point.prototype.getX = function getX () {
-           if (this.getCoordinate() === null) {
-             throw new Error('getX called on empty Point')
-           }
-           return this.getCoordinate().x
-         };
-         Point.prototype.compareToSameClass = function compareToSameClass () {
-           if (arguments.length === 1) {
-             var other = arguments[0];
-             var point$1 = other;
-             return this.getCoordinate().compareTo(point$1.getCoordinate())
-           } else if (arguments.length === 2) {
-             var other$1 = arguments[0];
-             var comp = arguments[1];
-             var point = other$1;
-             return comp.compare(this._coordinates, point._coordinates)
-           }
-         };
-         Point.prototype.apply = function apply () {
-           if (hasInterface(arguments[0], CoordinateFilter)) {
-             var filter = arguments[0];
-             if (this.isEmpty()) {
-               return null
+           } else if (!primary.has(osmvalue) && isNamelike(osmkey, 'alternate')) {
+             if (/;/.test(osmvalue)) {
+               foundSemi = true;
+             } else {
+               alternate.add(osmvalue);

              }
              }

-             filter.filter(this.getCoordinate());
-           } else if (hasInterface(arguments[0], CoordinateSequenceFilter)) {
-             var filter$1 = arguments[0];
-             if (this.isEmpty()) { return null }
-             filter$1.filter(this._coordinates, 0);
-             if (filter$1.isGeometryChanged()) { this.geometryChanged(); }
-           } else if (hasInterface(arguments[0], GeometryFilter)) {
-             var filter$2 = arguments[0];
-             filter$2.filter(this);
-           } else if (hasInterface(arguments[0], GeometryComponentFilter)) {
-             var filter$3 = arguments[0];
-             filter$3.filter(this);
-           }
-         };
-         Point.prototype.getBoundary = function getBoundary () {
-           return this.getFactory().createGeometryCollection(null)
-         };
-         Point.prototype.clone = function clone () {
-           var p = Geometry$$1.prototype.clone.call(this);
-           p._coordinates = this._coordinates.clone();
-           return p
-         };
-         Point.prototype.getGeometryType = function getGeometryType () {
-           return 'Point'
-         };
-         Point.prototype.copy = function copy () {
-           return new Point(this._coordinates.copy(), this._factory)
-         };
-         Point.prototype.getCoordinateSequence = function getCoordinateSequence () {
-           return this._coordinates
-         };
-         Point.prototype.getY = function getY () {
-           if (this.getCoordinate() === null) {
-             throw new Error('getY called on empty Point')
-           }
-           return this.getCoordinate().y
-         };
-         Point.prototype.isEmpty = function isEmpty () {
-           return this._coordinates.size() === 0
-         };
-         Point.prototype.init = function init (coordinates) {
-           if (coordinates === null) {
-             coordinates = this.getFactory().getCoordinateSequenceFactory().create([]);

            }
            }

-           Assert.isTrue(coordinates.size() <= 1);
-           this._coordinates = coordinates;
-         };
-         Point.prototype.isSimple = function isSimple () {
-           return true
-         };
-         Point.prototype.interfaces_ = function interfaces_ () {
-           return [Puntal]
-         };
-         Point.prototype.getClass = function getClass () {
-           return Point
-         };
-         staticAccessors.serialVersionUID.get = function () { return 4902022702746614570 };
+         }); // For flags only, fallback to `country` tag only if no other namelike values were found.
+         // See https://github.com/openstreetmap/iD/pull/8305#issuecomment-769174070

 
 

-         Object.defineProperties( Point, staticAccessors );
+         if (tags.man_made === 'flagpole' && !primary.size && !alternate.size && !!tags.country) {
+           var osmvalue = tags.country;

 
 

-         return Point;
-       }(Geometry));
+           if (/;/.test(osmvalue)) {
+             foundSemi = true;
+           } else {
+             alternate.add(osmvalue);
+           }
+         } // If any namelike value contained a semicolon, return empty set and don't try matching anything.

 
 

-       var Polygonal = function Polygonal () {};

 
 

-       Polygonal.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Polygonal.prototype.getClass = function getClass () {
-         return Polygonal
-       };
+         if (foundSemi) {
+           return empty;
+         } else {
+           return {
+             primary: primary,
+             alternate: alternate
+           };
+         }

 
 

-       var Polygon = (function (Geometry$$1) {
-         function Polygon (shell, holes, factory) {
-           Geometry$$1.call(this, factory);
-           this._shell = null;
-           this._holes = null;
-           if (shell === null) {
-             shell = this.getFactory().createLinearRing();
-           }
-           if (holes === null) {
-             holes = [];
-           }
-           if (Geometry$$1.hasNullElements(holes)) {
-             throw new IllegalArgumentException('holes must not contain null elements')
-           }
-           if (shell.isEmpty() && Geometry$$1.hasNonEmptyElements(holes)) {
-             throw new IllegalArgumentException('shell is empty but holes are not')
-           }
-           this._shell = shell;
-           this._holes = holes;
+         function isNamelike(osmkey, which) {
+           if (osmkey === 'old_name') return false;
+           return patterns[which].test(osmkey) && !notNames.test(osmkey);

          }
          }

+       } // `gatherTuples()`
+       // Generate all combinations of [key,value,name] that we want to test.
+       // This prioritizes them so that the primary name and k/v pairs go first
+       //
+       // Arguments
+       //   `tryKVs`: `Object` containing primary and alternate k/v pairs to test
+       //   `tryNames`: `Object` containing primary and alternate names to test
+       // Returns
+       //   `Array`: tuple objects ordered by priority
+       //
+
+
+       function gatherTuples(tryKVs, tryNames) {
+         var tuples = [];
+         ['primary', 'alternate'].forEach(function (whichName) {
+           // test names longest to shortest
+           var arr = Array.from(tryNames[whichName]).sort(function (a, b) {
+             return b.length - a.length;
+           });
+           arr.forEach(function (n) {
+             ['primary', 'alternate'].forEach(function (whichKV) {
+               tryKVs[whichKV].forEach(function (kv) {
+                 var parts = kv.split('/', 2);
+                 var k = parts[0];
+                 var v = parts[1];
+                 tuples.push({
+                   k: k,
+                   v: v,
+                   n: n
+                 });
+               });
+             });
+           });
+         });
+         return tuples;
+       } // `_upgradeTags()`
+       // Try to match a feature to a canonical record in name-suggestion-index
+       // and upgrade the tags to match.
+       //
+       // Arguments
+       //   `tags`: `Object` containing the feature's OSM tags
+       //   `loc`: Location where this feature exists, as a [lon, lat]
+       // Returns
+       //   `Object` containing the result, or `null` if no changes needed:
+       //   {
+       //     'newTags': `Object` - The tags the the feature should have
+       //     'matched': `Object` - The matched item
+       //   }
+       //
+
+
+       function _upgradeTags(tags, loc) {
+         var newTags = Object.assign({}, tags); // shallow copy

 
 

-         if ( Geometry$$1 ) { Polygon.__proto__ = Geometry$$1; }
-         Polygon.prototype = Object.create( Geometry$$1 && Geometry$$1.prototype );
-         Polygon.prototype.constructor = Polygon;
+         var changed = false; // Before anything, perform trivial Wikipedia/Wikidata replacements

 
 

-         var staticAccessors = { serialVersionUID: { configurable: true } };
-         Polygon.prototype.computeEnvelopeInternal = function computeEnvelopeInternal () {
-           return this._shell.getEnvelopeInternal()
-         };
-         Polygon.prototype.getSortIndex = function getSortIndex () {
-           return Geometry$$1.SORTINDEX_POLYGON
-         };
-         Polygon.prototype.getCoordinates = function getCoordinates () {
-           var this$1 = this;
-
-           if (this.isEmpty()) {
-             return []
-           }
-           var coordinates = new Array(this.getNumPoints()).fill(null);
-           var k = -1;
-           var shellCoordinates = this._shell.getCoordinates();
-           for (var x = 0; x < shellCoordinates.length; x++) {
-             k++;
-             coordinates[k] = shellCoordinates[x];
-           }
-           for (var i = 0; i < this._holes.length; i++) {
-             var childCoordinates = this$1._holes[i].getCoordinates();
-             for (var j = 0; j < childCoordinates.length; j++) {
-               k++;
-               coordinates[k] = childCoordinates[j];
-             }
-           }
-           return coordinates
-         };
-         Polygon.prototype.getArea = function getArea () {
-           var this$1 = this;
+         Object.keys(newTags).forEach(function (osmkey) {
+           var matchTag = osmkey.match(/^(\w+:)?wikidata$/);

 
 

-           var area = 0.0;
-           area += Math.abs(CGAlgorithms.signedArea(this._shell.getCoordinateSequence()));
-           for (var i = 0; i < this._holes.length; i++) {
-             area -= Math.abs(CGAlgorithms.signedArea(this$1._holes[i].getCoordinateSequence()));
-           }
-           return area
-         };
-         Polygon.prototype.isRectangle = function isRectangle () {
-           if (this.getNumInteriorRing() !== 0) { return false }
-           if (this._shell === null) { return false }
-           if (this._shell.getNumPoints() !== 5) { return false }
-           var seq = this._shell.getCoordinateSequence();
-           var env = this.getEnvelopeInternal();
-           for (var i = 0; i < 5; i++) {
-             var x = seq.getX(i);
-             if (!(x === env.getMinX() || x === env.getMaxX())) { return false }
-             var y = seq.getY(i);
-             if (!(y === env.getMinY() || y === env.getMaxY())) { return false }
-           }
-           var prevX = seq.getX(0);
-           var prevY = seq.getY(0);
-           for (var i$1 = 1; i$1 <= 4; i$1++) {
-             var x$1 = seq.getX(i$1);
-             var y$1 = seq.getY(i$1);
-             var xChanged = x$1 !== prevX;
-             var yChanged = y$1 !== prevY;
-             if (xChanged === yChanged) { return false }
-             prevX = x$1;
-             prevY = y$1;
-           }
-           return true
-         };
-         Polygon.prototype.equalsExact = function equalsExact () {
-           var this$1 = this;
+           if (matchTag) {
+             // Look at '*:wikidata' tags
+             var prefix = matchTag[1] || '';
+             var wd = newTags[osmkey];
+             var replace = _nsi.replacements[wd]; // If it matches a QID in the replacement list...

 
 

-           if (arguments.length === 2) {
-             var other = arguments[0];
-             var tolerance = arguments[1];
-             if (!this.isEquivalentClass(other)) {
-               return false
-             }
-             var otherPolygon = other;
-             var thisShell = this._shell;
-             var otherPolygonShell = otherPolygon._shell;
-             if (!thisShell.equalsExact(otherPolygonShell, tolerance)) {
-               return false
-             }
-             if (this._holes.length !== otherPolygon._holes.length) {
-               return false
-             }
-             for (var i = 0; i < this._holes.length; i++) {
-               if (!this$1._holes[i].equalsExact(otherPolygon._holes[i], tolerance)) {
-                 return false
-               }
-             }
-             return true
-           } else { return Geometry$$1.prototype.equalsExact.apply(this, arguments) }
-         };
-         Polygon.prototype.normalize = function normalize () {
-           var this$1 = this;
-
-           if (arguments.length === 0) {
-             this.normalize(this._shell, true);
-             for (var i = 0; i < this._holes.length; i++) {
-               this$1.normalize(this$1._holes[i], false);
-             }
-             Arrays.sort(this._holes);
-           } else if (arguments.length === 2) {
-             var ring = arguments[0];
-             var clockwise = arguments[1];
-             if (ring.isEmpty()) {
-               return null
-             }
-             var uniqueCoordinates = new Array(ring.getCoordinates().length - 1).fill(null);
-             System.arraycopy(ring.getCoordinates(), 0, uniqueCoordinates, 0, uniqueCoordinates.length);
-             var minCoordinate = CoordinateArrays.minCoordinate(ring.getCoordinates());
-             CoordinateArrays.scroll(uniqueCoordinates, minCoordinate);
-             System.arraycopy(uniqueCoordinates, 0, ring.getCoordinates(), 0, uniqueCoordinates.length);
-             ring.getCoordinates()[uniqueCoordinates.length] = uniqueCoordinates[0];
-             if (CGAlgorithms.isCCW(ring.getCoordinates()) === clockwise) {
-               CoordinateArrays.reverse(ring.getCoordinates());
-             }
-           }
-         };
-         Polygon.prototype.getCoordinate = function getCoordinate () {
-           return this._shell.getCoordinate()
-         };
-         Polygon.prototype.getNumInteriorRing = function getNumInteriorRing () {
-           return this._holes.length
-         };
-         Polygon.prototype.getBoundaryDimension = function getBoundaryDimension () {
-           return 1
-         };
-         Polygon.prototype.getDimension = function getDimension () {
-           return 2
-         };
-         Polygon.prototype.getLength = function getLength () {
-           var this$1 = this;
-
-           var len = 0.0;
-           len += this._shell.getLength();
-           for (var i = 0; i < this._holes.length; i++) {
-             len += this$1._holes[i].getLength();
-           }
-           return len
-         };
-         Polygon.prototype.getNumPoints = function getNumPoints () {
-           var this$1 = this;
-
-           var numPoints = this._shell.getNumPoints();
-           for (var i = 0; i < this._holes.length; i++) {
-             numPoints += this$1._holes[i].getNumPoints();
-           }
-           return numPoints
-         };
-         Polygon.prototype.reverse = function reverse () {
-           var this$1 = this;
-
-           var poly = this.copy();
-           poly._shell = this._shell.copy().reverse();
-           poly._holes = new Array(this._holes.length).fill(null);
-           for (var i = 0; i < this._holes.length; i++) {
-             poly._holes[i] = this$1._holes[i].copy().reverse();
-           }
-           return poly
-         };
-         Polygon.prototype.convexHull = function convexHull () {
-           return this.getExteriorRing().convexHull()
-         };
-         Polygon.prototype.compareToSameClass = function compareToSameClass () {
-           var this$1 = this;
+             if (replace && replace.wikidata !== undefined) {
+               // replace or delete `*:wikidata` tag
+               changed = true;

 
 

-           if (arguments.length === 1) {
-             var o = arguments[0];
-             var thisShell = this._shell;
-             var otherShell = o._shell;
-             return thisShell.compareToSameClass(otherShell)
-           } else if (arguments.length === 2) {
-             var o$1 = arguments[0];
-             var comp = arguments[1];
-             var poly = o$1;
-             var thisShell$1 = this._shell;
-             var otherShell$1 = poly._shell;
-             var shellComp = thisShell$1.compareToSameClass(otherShell$1, comp);
-             if (shellComp !== 0) { return shellComp }
-             var nHole1 = this.getNumInteriorRing();
-             var nHole2 = poly.getNumInteriorRing();
-             var i = 0;
-             while (i < nHole1 && i < nHole2) {
-               var thisHole = this$1.getInteriorRingN(i);
-               var otherHole = poly.getInteriorRingN(i);
-               var holeComp = thisHole.compareToSameClass(otherHole, comp);
-               if (holeComp !== 0) { return holeComp }
-               i++;
+               if (replace.wikidata) {
+                 newTags[osmkey] = replace.wikidata;
+               } else {
+                 delete newTags[osmkey];
+               }

              }
              }

-             if (i < nHole1) { return 1 }
-             if (i < nHole2) { return -1 }
-             return 0
-           }
-         };
-         Polygon.prototype.apply = function apply (filter) {
-           var this$1 = this;

 
 

-           if (hasInterface(filter, CoordinateFilter)) {
-             this._shell.apply(filter);
-             for (var i$1 = 0; i$1 < this._holes.length; i$1++) {
-               this$1._holes[i$1].apply(filter);
-             }
-           } else if (hasInterface(filter, CoordinateSequenceFilter)) {
-             this._shell.apply(filter);
-             if (!filter.isDone()) {
-               for (var i$2 = 0; i$2 < this._holes.length; i$2++) {
-                 this$1._holes[i$2].apply(filter);
-                 if (filter.isDone()) { break }
+             if (replace && replace.wikipedia !== undefined) {
+               // replace or delete `*:wikipedia` tag
+               changed = true;
+               var wpkey = "".concat(prefix, "wikipedia");
+
+               if (replace.wikipedia) {
+                 newTags[wpkey] = replace.wikipedia;
+               } else {
+                 delete newTags[wpkey];

                }
              }
                }
              }

-             if (filter.isGeometryChanged()) { this.geometryChanged(); }
-           } else if (hasInterface(filter, GeometryFilter)) {
-             filter.filter(this);
-           } else if (hasInterface(filter, GeometryComponentFilter)) {
-             filter.filter(this);
-             this._shell.apply(filter);
-             for (var i = 0; i < this._holes.length; i++) {
-               this$1._holes[i].apply(filter);
-             }

            }
            }

-         };
-         Polygon.prototype.getBoundary = function getBoundary () {
-           var this$1 = this;
+         }); // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184

 
 

-           if (this.isEmpty()) {
-             return this.getFactory().createMultiLineString()
-           }
-           var rings = new Array(this._holes.length + 1).fill(null);
-           rings[0] = this._shell;
-           for (var i = 0; i < this._holes.length; i++) {
-             rings[i + 1] = this$1._holes[i];
-           }
-           if (rings.length <= 1) { return this.getFactory().createLinearRing(rings[0].getCoordinateSequence()) }
-           return this.getFactory().createMultiLineString(rings)
-         };
-         Polygon.prototype.clone = function clone () {
-           var this$1 = this;
+         var isRouteMaster = tags.type === 'route_master'; // Gather key/value tag pairs to try to match

 
 

-           var poly = Geometry$$1.prototype.clone.call(this);
-           poly._shell = this._shell.clone();
-           poly._holes = new Array(this._holes.length).fill(null);
-           for (var i = 0; i < this._holes.length; i++) {
-             poly._holes[i] = this$1._holes[i].clone();
-           }
-           return poly
-         };
-         Polygon.prototype.getGeometryType = function getGeometryType () {
-           return 'Polygon'
-         };
-         Polygon.prototype.copy = function copy () {
-           var this$1 = this;
+         var tryKVs = gatherKVs(tags);

 
 

-           var shell = this._shell.copy();
-           var holes = new Array(this._holes.length).fill(null);
-           for (var i = 0; i < holes.length; i++) {
-             holes[i] = this$1._holes[i].copy();
-           }
-           return new Polygon(shell, holes, this._factory)
-         };
-         Polygon.prototype.getExteriorRing = function getExteriorRing () {
-           return this._shell
-         };
-         Polygon.prototype.isEmpty = function isEmpty () {
-           return this._shell.isEmpty()
-         };
-         Polygon.prototype.getInteriorRingN = function getInteriorRingN (n) {
-           return this._holes[n]
-         };
-         Polygon.prototype.interfaces_ = function interfaces_ () {
-           return [Polygonal]
-         };
-         Polygon.prototype.getClass = function getClass () {
-           return Polygon
-         };
-         staticAccessors.serialVersionUID.get = function () { return -3494792200821764533 };
+         if (!tryKVs.primary.size && !tryKVs.alternate.size) {
+           return changed ? {
+             newTags: newTags,
+             matched: null
+           } : null;
+         } // Gather namelike tag values to try to match

 
 

-         Object.defineProperties( Polygon, staticAccessors );

 
 

-         return Polygon;
-       }(Geometry));
+         var tryNames = gatherNames(tags); // Do `wikidata=*` or `wikipedia=*` tags identify this entity as a chain? - See #6416
+         // If so, these tags can be swapped to e.g. `brand:wikidata`/`brand:wikipedia`.

 
 

-       var MultiPoint = (function (GeometryCollection$$1) {
-         function MultiPoint () {
-           GeometryCollection$$1.apply(this, arguments);
-         }
+         var foundQID = _nsi.qids.get(tags.wikidata) || _nsi.qids.get(tags.wikipedia);

 
 

-         if ( GeometryCollection$$1 ) { MultiPoint.__proto__ = GeometryCollection$$1; }
-         MultiPoint.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-         MultiPoint.prototype.constructor = MultiPoint;
+         if (foundQID) tryNames.primary.add(foundQID); // matcher will recognize the Wikidata QID as name too

 
 

-         var staticAccessors = { serialVersionUID: { configurable: true } };
+         if (!tryNames.primary.size && !tryNames.alternate.size) {
+           return changed ? {
+             newTags: newTags,
+             matched: null
+           } : null;
+         } // Order the [key,value,name] tuples - test primary before alternate

 
 

-         MultiPoint.prototype.getSortIndex = function getSortIndex () {
-           return Geometry.SORTINDEX_MULTIPOINT
-         };
-         MultiPoint.prototype.isValid = function isValid () {
-           return true
-         };
-         MultiPoint.prototype.equalsExact = function equalsExact () {
-           if (arguments.length === 2) {
-             var other = arguments[0];
-             var tolerance = arguments[1];
-             if (!this.isEquivalentClass(other)) {
-               return false
-             }
-             return GeometryCollection$$1.prototype.equalsExact.call(this, other, tolerance)
-           } else { return GeometryCollection$$1.prototype.equalsExact.apply(this, arguments) }
-         };
-         MultiPoint.prototype.getCoordinate = function getCoordinate () {
-           if (arguments.length === 1) {
-             var n = arguments[0];
-             return this._geometries[n].getCoordinate()
-           } else { return GeometryCollection$$1.prototype.getCoordinate.apply(this, arguments) }
-         };
-         MultiPoint.prototype.getBoundaryDimension = function getBoundaryDimension () {
-           return Dimension.FALSE
-         };
-         MultiPoint.prototype.getDimension = function getDimension () {
-           return 0
-         };
-         MultiPoint.prototype.getBoundary = function getBoundary () {
-           return this.getFactory().createGeometryCollection(null)
-         };
-         MultiPoint.prototype.getGeometryType = function getGeometryType () {
-           return 'MultiPoint'
-         };
-         MultiPoint.prototype.copy = function copy () {
-           var this$1 = this;

 
 

-           var points = new Array(this._geometries.length).fill(null);
-           for (var i = 0; i < points.length; i++) {
-             points[i] = this$1._geometries[i].copy();
-           }
-           return new MultiPoint(points, this._factory)
-         };
-         MultiPoint.prototype.interfaces_ = function interfaces_ () {
-           return [Puntal]
-         };
-         MultiPoint.prototype.getClass = function getClass () {
-           return MultiPoint
-         };
-         staticAccessors.serialVersionUID.get = function () { return -8048474874175355449 };
+         var tuples = gatherTuples(tryKVs, tryNames);

 
 

-         Object.defineProperties( MultiPoint, staticAccessors );
+         var _loop = function _loop(i) {
+           var tuple = tuples[i];

 
 

-         return MultiPoint;
-       }(GeometryCollection));
+           var hits = _nsi.matcher.match(tuple.k, tuple.v, tuple.n, loc); // Attempt to match an item in NSI

 
 

-       var LinearRing = (function (LineString$$1) {
-         function LinearRing (points, factory) {
-           if (points instanceof Coordinate && factory instanceof GeometryFactory) {
-             points = factory.getCoordinateSequenceFactory().create(points);
-           }
-           LineString$$1.call(this, points, factory);
-           this.validateConstruction();
-         }

 
 

-         if ( LineString$$1 ) { LinearRing.__proto__ = LineString$$1; }
-         LinearRing.prototype = Object.create( LineString$$1 && LineString$$1.prototype );
-         LinearRing.prototype.constructor = LinearRing;
+           if (!hits || !hits.length) return "continue"; // no match, try next tuple

 
 

-         var staticAccessors = { MINIMUM_VALID_SIZE: { configurable: true },serialVersionUID: { configurable: true } };
-         LinearRing.prototype.getSortIndex = function getSortIndex () {
-           return Geometry.SORTINDEX_LINEARRING
-         };
-         LinearRing.prototype.getBoundaryDimension = function getBoundaryDimension () {
-           return Dimension.FALSE
-         };
-         LinearRing.prototype.isClosed = function isClosed () {
-           if (this.isEmpty()) {
-             return true
-           }
-           return LineString$$1.prototype.isClosed.call(this)
-         };
-         LinearRing.prototype.reverse = function reverse () {
-           var seq = this._points.copy();
-           CoordinateSequences.reverse(seq);
-           var rev = this.getFactory().createLinearRing(seq);
-           return rev
-         };
-         LinearRing.prototype.validateConstruction = function validateConstruction () {
-           if (!this.isEmpty() && !LineString$$1.prototype.isClosed.call(this)) {
-             throw new IllegalArgumentException('Points of LinearRing do not form a closed linestring')
-           }
-           if (this.getCoordinateSequence().size() >= 1 && this.getCoordinateSequence().size() < LinearRing.MINIMUM_VALID_SIZE) {
-             throw new IllegalArgumentException('Invalid number of points in LinearRing (found ' + this.getCoordinateSequence().size() + ' - must be 0 or >= 4)')
-           }
-         };
-         LinearRing.prototype.getGeometryType = function getGeometryType () {
-           return 'LinearRing'
-         };
-         LinearRing.prototype.copy = function copy () {
-           return new LinearRing(this._points.copy(), this._factory)
-         };
-         LinearRing.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         LinearRing.prototype.getClass = function getClass () {
-           return LinearRing
-         };
-         staticAccessors.MINIMUM_VALID_SIZE.get = function () { return 4 };
-         staticAccessors.serialVersionUID.get = function () { return -4261142084085851829 };
+           if (hits[0].match !== 'primary' && hits[0].match !== 'alternate') return "break"; // a generic match, stop looking
+           // A match may contain multiple results, the first one is likely the best one for this location
+           // e.g. `['pfk-a54c14', 'kfc-1ff19c', 'kfc-658eea']`

 
 

-         Object.defineProperties( LinearRing, staticAccessors );
+           var itemID = void 0,
+               item = void 0;

 
 

-         return LinearRing;
-       }(LineString));
+           for (var j = 0; j < hits.length; j++) {
+             var hit = hits[j];
+             itemID = hit.itemID;
+             if (_nsi.dissolved[itemID]) continue; // Don't upgrade to a dissolved item

 
 

-       var MultiPolygon = (function (GeometryCollection$$1) {
-         function MultiPolygon () {
-           GeometryCollection$$1.apply(this, arguments);
-         }
+             item = _nsi.ids.get(itemID);
+             if (!item) continue;
+             var mainTag = item.mainTag; // e.g. `brand:wikidata`

 
 

-         if ( GeometryCollection$$1 ) { MultiPolygon.__proto__ = GeometryCollection$$1; }
-         MultiPolygon.prototype = Object.create( GeometryCollection$$1 && GeometryCollection$$1.prototype );
-         MultiPolygon.prototype.constructor = MultiPolygon;
+             var itemQID = item.tags[mainTag]; // e.g. `brand:wikidata` qid

 
 

-         var staticAccessors = { serialVersionUID: { configurable: true } };
+             var notQID = newTags["not:".concat(mainTag)]; // e.g. `not:brand:wikidata` qid

 
 

-         MultiPolygon.prototype.getSortIndex = function getSortIndex () {
-           return Geometry.SORTINDEX_MULTIPOLYGON
-         };
-         MultiPolygon.prototype.equalsExact = function equalsExact () {
-           if (arguments.length === 2) {
-             var other = arguments[0];
-             var tolerance = arguments[1];
-             if (!this.isEquivalentClass(other)) {
-               return false
-             }
-             return GeometryCollection$$1.prototype.equalsExact.call(this, other, tolerance)
-           } else { return GeometryCollection$$1.prototype.equalsExact.apply(this, arguments) }
-         };
-         MultiPolygon.prototype.getBoundaryDimension = function getBoundaryDimension () {
-           return 1
-         };
-         MultiPolygon.prototype.getDimension = function getDimension () {
-           return 2
-         };
-         MultiPolygon.prototype.reverse = function reverse () {
-           var this$1 = this;
+             if ( // Exceptions, skip this hit
+             !itemQID || itemQID === notQID || // No `*:wikidata` or matched a `not:*:wikidata`
+             newTags.office && !item.tags.office // feature may be a corporate office for a brand? - #6416
+             ) {
+                 item = null;
+                 continue; // continue looking
+               } else {
+                 break; // use `item`
+               }
+           } // Can't use any of these hits, try next tuple..

 
 

-           var n = this._geometries.length;
-           var revGeoms = new Array(n).fill(null);
-           for (var i = 0; i < this._geometries.length; i++) {
-             revGeoms[i] = this$1._geometries[i].reverse();
-           }
-           return this.getFactory().createMultiPolygon(revGeoms)
-         };
-         MultiPolygon.prototype.getBoundary = function getBoundary () {
-           var this$1 = this;

 
 

-           if (this.isEmpty()) {
-             return this.getFactory().createMultiLineString()
-           }
-           var allRings = new ArrayList();
-           for (var i = 0; i < this._geometries.length; i++) {
-             var polygon = this$1._geometries[i];
-             var rings = polygon.getBoundary();
-             for (var j = 0; j < rings.getNumGeometries(); j++) {
-               allRings.add(rings.getGeometryN(j));
+           if (!item) return "continue"; // At this point we have matched a canonical item and can suggest tag upgrades..
+
+           item = JSON.parse(JSON.stringify(item)); // deep copy
+
+           var tkv = item.tkv;
+           var parts = tkv.split('/', 3); // tkv = "tree/key/value"
+
+           var k = parts[1];
+           var v = parts[2];
+           var category = _nsi.data[tkv];
+           var properties = category.properties || {}; // Preserve some tags that we specifically don't want NSI to overwrite. ('^name', sometimes)
+
+           var preserveTags = item.preserveTags || properties.preserveTags || []; // These tags can be toplevel tags -or- attributes - so we generally want to preserve existing values - #8615
+           // We'll only _replace_ the tag value if this tag is the toplevel/defining tag for the matched item (`k`)
+
+           ['building', 'emergency', 'internet_access', 'takeaway'].forEach(function (osmkey) {
+             if (k !== osmkey) preserveTags.push("^".concat(osmkey, "$"));
+           });
+           var regexes = preserveTags.map(function (s) {
+             return new RegExp(s, 'i');
+           });
+           var keepTags = {};
+           Object.keys(newTags).forEach(function (osmkey) {
+             if (regexes.some(function (regex) {
+               return regex.test(osmkey);
+             })) {
+               keepTags[osmkey] = newTags[osmkey];

              }
              }

-           }
-           var allRingsArray = new Array(allRings.size()).fill(null);
-           return this.getFactory().createMultiLineString(allRings.toArray(allRingsArray))
-         };
-         MultiPolygon.prototype.getGeometryType = function getGeometryType () {
-           return 'MultiPolygon'
-         };
-         MultiPolygon.prototype.copy = function copy () {
-           var this$1 = this;
+           }); // Remove any primary tags ("amenity", "craft", "shop", "man_made", "route", etc) that have a
+           // value like `amenity=yes` or `shop=yes` (exceptions have already been added to `keepTags` above)

 
 

-           var polygons = new Array(this._geometries.length).fill(null);
-           for (var i = 0; i < polygons.length; i++) {
-             polygons[i] = this$1._geometries[i].copy();
-           }
-           return new MultiPolygon(polygons, this._factory)
-         };
-         MultiPolygon.prototype.interfaces_ = function interfaces_ () {
-           return [Polygonal]
-         };
-         MultiPolygon.prototype.getClass = function getClass () {
-           return MultiPolygon
-         };
-         staticAccessors.serialVersionUID.get = function () { return -551033529766975875 };
+           _nsi.kvt.forEach(function (vmap, k) {
+             if (newTags[k] === 'yes') delete newTags[k];
+           }); // Replace mistagged `wikidata`/`wikipedia` with e.g. `brand:wikidata`/`brand:wikipedia`

 
 

-         Object.defineProperties( MultiPolygon, staticAccessors );

 
 

-         return MultiPolygon;
-       }(GeometryCollection));
+           if (foundQID) {
+             delete newTags.wikipedia;
+             delete newTags.wikidata;
+           } // Do the tag upgrade

 
 

-       var GeometryEditor = function GeometryEditor (factory) {
-         this._factory = factory || null;
-         this._isUserDataCopied = false;
-       };

 
 

-       var staticAccessors$16 = { NoOpGeometryOperation: { configurable: true },CoordinateOperation: { configurable: true },CoordinateSequenceOperation: { configurable: true } };
-       GeometryEditor.prototype.setCopyUserData = function setCopyUserData (isUserDataCopied) {
-         this._isUserDataCopied = isUserDataCopied;
-       };
-       GeometryEditor.prototype.edit = function edit (geometry, operation) {
-         if (geometry === null) { return null }
-         var result = this.editInternal(geometry, operation);
-         if (this._isUserDataCopied) {
-           result.setUserData(geometry.getUserData());
-         }
-         return result
-       };
-       GeometryEditor.prototype.editInternal = function editInternal (geometry, operation) {
-         if (this._factory === null) { this._factory = geometry.getFactory(); }
-         if (geometry instanceof GeometryCollection) {
-           return this.editGeometryCollection(geometry, operation)
-         }
-         if (geometry instanceof Polygon) {
-           return this.editPolygon(geometry, operation)
-         }
-         if (geometry instanceof Point$1) {
-           return operation.edit(geometry, this._factory)
-         }
-         if (geometry instanceof LineString) {
-           return operation.edit(geometry, this._factory)
-         }
-         Assert.shouldNeverReachHere('Unsupported Geometry class: ' + geometry.getClass().getName());
-         return null
-       };
-       GeometryEditor.prototype.editGeometryCollection = function editGeometryCollection (collection, operation) {
-           var this$1 = this;
+           Object.assign(newTags, item.tags, keepTags); // Swap `route` back to `route_master` - name-suggestion-index#5184

 
 

-         var collectionForType = operation.edit(collection, this._factory);
-         var geometries = new ArrayList();
-         for (var i = 0; i < collectionForType.getNumGeometries(); i++) {
-           var geometry = this$1.edit(collectionForType.getGeometryN(i), operation);
-           if (geometry === null || geometry.isEmpty()) {
-             continue
-           }
-           geometries.add(geometry);
-         }
-         if (collectionForType.getClass() === MultiPoint) {
-           return this._factory.createMultiPoint(geometries.toArray([]))
-         }
-         if (collectionForType.getClass() === MultiLineString) {
-           return this._factory.createMultiLineString(geometries.toArray([]))
-         }
-         if (collectionForType.getClass() === MultiPolygon) {
-           return this._factory.createMultiPolygon(geometries.toArray([]))
-         }
-         return this._factory.createGeometryCollection(geometries.toArray([]))
-       };
-       GeometryEditor.prototype.editPolygon = function editPolygon (polygon, operation) {
-           var this$1 = this;
+           if (isRouteMaster) {
+             newTags.route_master = newTags.route;
+             delete newTags.route;
+           } // Special `branch` splitting rules - IF..
+           // - NSI is suggesting to replace `name`, AND
+           // - `branch` doesn't already contain something, AND
+           // - original name has not moved to an alternate name (e.g. "Dunkin' Donuts" -> "Dunkin'"), AND
+           // - original name is "some name" + "some stuff", THEN
+           // consider splitting `name` into `name`/`branch`..

 
 

-         var newPolygon = operation.edit(polygon, this._factory);
-         if (newPolygon === null) { newPolygon = this._factory.createPolygon(null); }
-         if (newPolygon.isEmpty()) {
-           return newPolygon
-         }
-         var shell = this.edit(newPolygon.getExteriorRing(), operation);
-         if (shell === null || shell.isEmpty()) {
-           return this._factory.createPolygon()
-         }
-         var holes = new ArrayList();
-         for (var i = 0; i < newPolygon.getNumInteriorRing(); i++) {
-           var hole = this$1.edit(newPolygon.getInteriorRingN(i), operation);
-           if (hole === null || hole.isEmpty()) {
-             continue
-           }
-           holes.add(hole);
-         }
-         return this._factory.createPolygon(shell, holes.toArray([]))
-       };
-       GeometryEditor.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       GeometryEditor.prototype.getClass = function getClass () {
-         return GeometryEditor
-       };
-       GeometryEditor.GeometryEditorOperation = function GeometryEditorOperation () {};
-       staticAccessors$16.NoOpGeometryOperation.get = function () { return NoOpGeometryOperation };
-       staticAccessors$16.CoordinateOperation.get = function () { return CoordinateOperation };
-       staticAccessors$16.CoordinateSequenceOperation.get = function () { return CoordinateSequenceOperation };

 
 

-       Object.defineProperties( GeometryEditor, staticAccessors$16 );
+           var origName = tags.name;
+           var newName = newTags.name;

 
 

-       var NoOpGeometryOperation = function NoOpGeometryOperation () {};
+           if (newName && origName && newName !== origName && !newTags.branch) {
+             var newNames = gatherNames(newTags);
+             var newSet = new Set([].concat(_toConsumableArray(newNames.primary), _toConsumableArray(newNames.alternate)));
+             var isMoved = newSet.has(origName); // another tag holds the original name now

 
 

-       NoOpGeometryOperation.prototype.edit = function edit (geometry, factory) {
-         return geometry
-       };
-       NoOpGeometryOperation.prototype.interfaces_ = function interfaces_ () {
-         return [GeometryEditor.GeometryEditorOperation]
-       };
-       NoOpGeometryOperation.prototype.getClass = function getClass () {
-         return NoOpGeometryOperation
-       };
+             if (!isMoved) {
+               // Test name fragments, longest to shortest, to fit them into a "Name Branch" pattern.
+               // e.g. "TUI ReiseCenter - Neuss Innenstadt" -> ["TUI", "ReiseCenter", "Neuss", "Innenstadt"]
+               var nameParts = origName.split(/[\s\-\/,.]/);

 
 

-       var CoordinateOperation = function CoordinateOperation () {};
+               for (var split = nameParts.length; split > 0; split--) {
+                 var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"

 
 

-       CoordinateOperation.prototype.edit = function edit (geometry, factory) {
-         var coords = this.editCoordinates(geometry.getCoordinates(), geometry);
-         if (coords === null) { return geometry }
-         if (geometry instanceof LinearRing) {
-           return factory.createLinearRing(coords)
-         }
-         if (geometry instanceof LineString) {
-           return factory.createLineString(coords)
-         }
-         if (geometry instanceof Point$1) {
-           if (coords.length > 0) {
-             return factory.createPoint(coords[0])
-           } else {
-             return factory.createPoint()
-           }
-         }
-         return geometry
-       };
-       CoordinateOperation.prototype.interfaces_ = function interfaces_ () {
-         return [GeometryEditor.GeometryEditorOperation]
-       };
-       CoordinateOperation.prototype.getClass = function getClass () {
-         return CoordinateOperation
-       };
+                 var branch = nameParts.slice(split).join(' '); // e.g. "Neuss Innenstadt"

 
 

-       var CoordinateSequenceOperation = function CoordinateSequenceOperation () {};
+                 var nameHits = _nsi.matcher.match(k, v, name, loc);

 
 

-       CoordinateSequenceOperation.prototype.edit = function edit (geometry, factory) {
-         if (geometry instanceof LinearRing) {
-           return factory.createLinearRing(this.edit(geometry.getCoordinateSequence(), geometry))
-         }
-         if (geometry instanceof LineString) {
-           return factory.createLineString(this.edit(geometry.getCoordinateSequence(), geometry))
-         }
-         if (geometry instanceof Point$1) {
-           return factory.createPoint(this.edit(geometry.getCoordinateSequence(), geometry))
-         }
-         return geometry
-       };
-       CoordinateSequenceOperation.prototype.interfaces_ = function interfaces_ () {
-         return [GeometryEditor.GeometryEditorOperation]
-       };
-       CoordinateSequenceOperation.prototype.getClass = function getClass () {
-         return CoordinateSequenceOperation
-       };
+                 if (!nameHits || !nameHits.length) continue; // no match, try next name fragment

 
 

-       var CoordinateArraySequence = function CoordinateArraySequence () {
-         var this$1 = this;
+                 if (nameHits.some(function (hit) {
+                   return hit.itemID === itemID;
+                 })) {
+                   // matched the name fragment to the same itemID above
+                   if (branch) {
+                     if (notBranches.test(branch)) {
+                       // "branch" was detected but is noise ("factory outlet", etc)
+                       newTags.name = origName; // Leave `name` alone, this part of the name may be significant..
+                     } else {
+                       var branchHits = _nsi.matcher.match(k, v, branch, loc);

 
 

-         this._dimension = 3;
-         this._coordinates = null;
-         if (arguments.length === 1) {
-           if (arguments[0] instanceof Array) {
-             this._coordinates = arguments[0];
-             this._dimension = 3;
-           } else if (Number.isInteger(arguments[0])) {
-             var size = arguments[0];
-             this._coordinates = new Array(size).fill(null);
-             for (var i = 0; i < size; i++) {
-               this$1._coordinates[i] = new Coordinate();
-             }
-           } else if (hasInterface(arguments[0], CoordinateSequence)) {
-             var coordSeq = arguments[0];
-             if (coordSeq === null) {
-               this._coordinates = new Array(0).fill(null);
-               return null
-             }
-             this._dimension = coordSeq.getDimension();
-             this._coordinates = new Array(coordSeq.size()).fill(null);
-             for (var i$1 = 0; i$1 < this._coordinates.length; i$1++) {
-               this$1._coordinates[i$1] = coordSeq.getCoordinateCopy(i$1);
-             }
-           }
-         } else if (arguments.length === 2) {
-           if (arguments[0] instanceof Array && Number.isInteger(arguments[1])) {
-             var coordinates = arguments[0];
-             var dimension = arguments[1];
-             this._coordinates = coordinates;
-             this._dimension = dimension;
-             if (coordinates === null) { this._coordinates = new Array(0).fill(null); }
-           } else if (Number.isInteger(arguments[0]) && Number.isInteger(arguments[1])) {
-             var size$1 = arguments[0];
-             var dimension$1 = arguments[1];
-             this._coordinates = new Array(size$1).fill(null);
-             this._dimension = dimension$1;
-             for (var i$2 = 0; i$2 < size$1; i$2++) {
-               this$1._coordinates[i$2] = new Coordinate();
+                       if (branchHits && branchHits.length) {
+                         // if "branch" matched something else in NSI..
+                         if (branchHits[0].match === 'primary' || branchHits[0].match === 'alternate') {
+                           // if another brand! (e.g. "KFC - Taco Bell"?)
+                           return {
+                             v: null
+                           }; //   bail out - can't suggest tags in this case
+                         } // else a generic (e.g. "gas", "cafe") - ignore
+
+                       } else {
+                         // "branch" is not noise and not something in NSI
+                         newTags.branch = branch; // Stick it in the `branch` tag..
+                       }
+                     }
+                   }
+
+                   break;
+                 }
+               }

              }
            }
              }
            }

-         }
-       };

 
 

-       var staticAccessors$18 = { serialVersionUID: { configurable: true } };
-       CoordinateArraySequence.prototype.setOrdinate = function setOrdinate (index, ordinateIndex, value) {
-         switch (ordinateIndex) {
-           case CoordinateSequence.X:
-             this._coordinates[index].x = value;
-             break
-           case CoordinateSequence.Y:
-             this._coordinates[index].y = value;
-             break
-           case CoordinateSequence.Z:
-             this._coordinates[index].z = value;
-             break
-           default:
-             throw new IllegalArgumentException('invalid ordinateIndex')
-         }
-       };
-       CoordinateArraySequence.prototype.size = function size () {
-         return this._coordinates.length
-       };
-       CoordinateArraySequence.prototype.getOrdinate = function getOrdinate (index, ordinateIndex) {
-         switch (ordinateIndex) {
-           case CoordinateSequence.X:
-             return this._coordinates[index].x
-           case CoordinateSequence.Y:
-             return this._coordinates[index].y
-           case CoordinateSequence.Z:
-             return this._coordinates[index].z
-         }
-         return Double.NaN
-       };
-       CoordinateArraySequence.prototype.getCoordinate = function getCoordinate () {
-         if (arguments.length === 1) {
-           var i = arguments[0];
-           return this._coordinates[i]
-         } else if (arguments.length === 2) {
-           var index = arguments[0];
-           var coord = arguments[1];
-           coord.x = this._coordinates[index].x;
-           coord.y = this._coordinates[index].y;
-           coord.z = this._coordinates[index].z;
-         }
-       };
-       CoordinateArraySequence.prototype.getCoordinateCopy = function getCoordinateCopy (i) {
-         return new Coordinate(this._coordinates[i])
-       };
-       CoordinateArraySequence.prototype.getDimension = function getDimension () {
-         return this._dimension
-       };
-       CoordinateArraySequence.prototype.getX = function getX (index) {
-         return this._coordinates[index].x
-       };
-       CoordinateArraySequence.prototype.clone = function clone () {
-           var this$1 = this;
+           return {
+             v: {
+               newTags: newTags,
+               matched: item
+             }
+           };
+         };

 
 

-         var cloneCoordinates = new Array(this.size()).fill(null);
-         for (var i = 0; i < this._coordinates.length; i++) {
-           cloneCoordinates[i] = this$1._coordinates[i].clone();
-         }
-         return new CoordinateArraySequence(cloneCoordinates, this._dimension)
-       };
-       CoordinateArraySequence.prototype.expandEnvelope = function expandEnvelope (env) {
-           var this$1 = this;
+         for (var i = 0; i < tuples.length; i++) {
+           var _ret = _loop(i);

 
 

-         for (var i = 0; i < this._coordinates.length; i++) {
-           env.expandToInclude(this$1._coordinates[i]);
+           if (_ret === "continue") continue;
+           if (_ret === "break") break;
+           if (_typeof(_ret) === "object") return _ret.v;

          }
          }

-         return env
-       };
-       CoordinateArraySequence.prototype.copy = function copy () {
-           var this$1 = this;

 
 

-         var cloneCoordinates = new Array(this.size()).fill(null);
-         for (var i = 0; i < this._coordinates.length; i++) {
-           cloneCoordinates[i] = this$1._coordinates[i].copy();
-         }
-         return new CoordinateArraySequence(cloneCoordinates, this._dimension)
-       };
-       CoordinateArraySequence.prototype.toString = function toString () {
-           var this$1 = this;
-
-         if (this._coordinates.length > 0) {
-           var strBuf = new StringBuffer(17 * this._coordinates.length);
-           strBuf.append('(');
-           strBuf.append(this._coordinates[0]);
-           for (var i = 1; i < this._coordinates.length; i++) {
-             strBuf.append(', ');
-             strBuf.append(this$1._coordinates[i]);
-           }
-           strBuf.append(')');
-           return strBuf.toString()
-         } else {
-           return '()'
-         }
-       };
-       CoordinateArraySequence.prototype.getY = function getY (index) {
-         return this._coordinates[index].y
-       };
-       CoordinateArraySequence.prototype.toCoordinateArray = function toCoordinateArray () {
-         return this._coordinates
-       };
-       CoordinateArraySequence.prototype.interfaces_ = function interfaces_ () {
-         return [CoordinateSequence, Serializable]
-       };
-       CoordinateArraySequence.prototype.getClass = function getClass () {
-         return CoordinateArraySequence
-       };
-       staticAccessors$18.serialVersionUID.get = function () { return -915438501601840650 };
+         return changed ? {
+           newTags: newTags,
+           matched: null
+         } : null;
+       } // `_isGenericName()`
+       // Is the `name` tag generic?
+       //
+       // Arguments
+       //   `tags`: `Object` containing the feature's OSM tags
+       // Returns
+       //   `true` if it is generic, `false` if not
+       //

 
 

-       Object.defineProperties( CoordinateArraySequence, staticAccessors$18 );

 
 

-       var CoordinateArraySequenceFactory = function CoordinateArraySequenceFactory () {};
+       function _isGenericName(tags) {
+         var n = tags.name;
+         if (!n) return false; // tryNames just contains the `name` tag value and nothing else

 
 

-       var staticAccessors$17 = { serialVersionUID: { configurable: true },instanceObject: { configurable: true } };
+         var tryNames = {
+           primary: new Set([n]),
+           alternate: new Set()
+         }; // Gather key/value tag pairs to try to match

 
 

-       CoordinateArraySequenceFactory.prototype.readResolve = function readResolve () {
-         return CoordinateArraySequenceFactory.instance()
-       };
-       CoordinateArraySequenceFactory.prototype.create = function create () {
-         if (arguments.length === 1) {
-           if (arguments[0] instanceof Array) {
-             var coordinates = arguments[0];
-             return new CoordinateArraySequence(coordinates)
-           } else if (hasInterface(arguments[0], CoordinateSequence)) {
-             var coordSeq = arguments[0];
-             return new CoordinateArraySequence(coordSeq)
-           }
-         } else if (arguments.length === 2) {
-           var size = arguments[0];
-           var dimension = arguments[1];
-           if (dimension > 3) { dimension = 3; }
-           if (dimension < 2) { return new CoordinateArraySequence(size) }
-           return new CoordinateArraySequence(size, dimension)
-         }
-       };
-       CoordinateArraySequenceFactory.prototype.interfaces_ = function interfaces_ () {
-         return [CoordinateSequenceFactory, Serializable]
-       };
-       CoordinateArraySequenceFactory.prototype.getClass = function getClass () {
-         return CoordinateArraySequenceFactory
-       };
-       CoordinateArraySequenceFactory.instance = function instance () {
-         return CoordinateArraySequenceFactory.instanceObject
-       };
+         var tryKVs = gatherKVs(tags);
+         if (!tryKVs.primary.size && !tryKVs.alternate.size) return false; // Order the [key,value,name] tuples - test primary before alternate

 
 

-       staticAccessors$17.serialVersionUID.get = function () { return -4099577099607551657 };
-       staticAccessors$17.instanceObject.get = function () { return new CoordinateArraySequenceFactory() };
+         var tuples = gatherTuples(tryKVs, tryNames);

 
 

-       Object.defineProperties( CoordinateArraySequenceFactory, staticAccessors$17 );
+         for (var i = 0; i < tuples.length; i++) {
+           var tuple = tuples[i];

 
 

-       /**
-        * @see http://download.oracle.com/javase/6/docs/api/java/util/HashMap.html
-        *
-        * @extends {javascript.util.Map}
-        * @constructor
-        * @private
-        */
-       var HashMap = (function (MapInterface) {
-         function HashMap () {
-           MapInterface.call(this);
-           this.map_ = new Map();
-         }
+           var hits = _nsi.matcher.match(tuple.k, tuple.v, tuple.n); // Attempt to match an item in NSI
+           // If we get a `excludeGeneric` hit, this is a generic name.

 
 

-         if ( MapInterface ) { HashMap.__proto__ = MapInterface; }
-         HashMap.prototype = Object.create( MapInterface && MapInterface.prototype );
-         HashMap.prototype.constructor = HashMap;
-         /**
-          * @override
-          */
-         HashMap.prototype.get = function get (key) {
-           return this.map_.get(key) || null
-         };

 
 

-         /**
-          * @override
-          */
-         HashMap.prototype.put = function put (key, value) {
-           this.map_.set(key, value);
-           return value
-         };
+           if (hits && hits.length && hits[0].match === 'excludeGeneric') return true;
+         }

 
 

-         /**
-          * @override
-          */
-         HashMap.prototype.values = function values () {
-           var arrayList = new ArrayList();
-           var it = this.map_.values();
-           var o = it.next();
-           while (!o.done) {
-             arrayList.add(o.value);
-             o = it.next();
-           }
-           return arrayList
-         };
+         return false;
+       } // PUBLIC INTERFACE

 
 

-         /**
-          * @override
-          */
-         HashMap.prototype.entrySet = function entrySet () {
-           var hashSet = new HashSet();
-           this.map_.entries().forEach(function (entry) { return hashSet.add(entry); });
-           return hashSet
-         };

 
 

-         /**
-          * @override
-          */
-         HashMap.prototype.size = function size () {
-           return this.map_.size()
-         };
-
-         return HashMap;
-       }(Map$1$1));
-
-       var PrecisionModel = function PrecisionModel () {
-         this._modelType = null;
-         this._scale = null;
-         if (arguments.length === 0) {
-           this._modelType = PrecisionModel.FLOATING;
-         } else if (arguments.length === 1) {
-           if (arguments[0] instanceof Type$2) {
-             var modelType = arguments[0];
-             this._modelType = modelType;
-             if (modelType === PrecisionModel.FIXED) {
-               this.setScale(1.0);
-             }
-           } else if (typeof arguments[0] === 'number') {
-             var scale = arguments[0];
-             this._modelType = PrecisionModel.FIXED;
-             this.setScale(scale);
-           } else if (arguments[0] instanceof PrecisionModel) {
-             var pm = arguments[0];
-             this._modelType = pm._modelType;
-             this._scale = pm._scale;
+       var serviceNsi = {
+         // `init()`
+         // On init, start preparing the name-suggestion-index
+         //
+         init: function init() {
+           // Note: service.init is called immediately after the presetManager has started loading its data.
+           // We expect to chain onto an unfulfilled promise here.
+           setNsiSources();
+           _mainPresetIndex.ensureLoaded().then(function () {
+             return loadNsiPresets();
+           }).then(function () {
+             return delay(100);
+           }) // wait briefly for locationSets to enter the locationManager queue
+           .then(function () {
+             return _mainLocations.mergeLocationSets([]);
+           }) // wait for locationSets to resolve
+           .then(function () {
+             return loadNsiData();
+           }).then(function () {
+             return _nsiStatus = 'ok';
+           })["catch"](function () {
+             return _nsiStatus = 'failed';
+           });
+
+           function delay(msec) {
+             return new Promise(function (resolve) {
+               window.setTimeout(resolve, msec);
+             });

            }
            }

+         },
+         // `reset()`
+         // Reset is called when user saves data to OSM (does nothing here)
+         //
+         reset: function reset() {},
+         // `status()`
+         // To let other code know how it's going...
+         //
+         // Returns
+         //   `String`: 'loading', 'ok', 'failed'
+         //
+         status: function status() {
+           return _nsiStatus;
+         },
+         // `isGenericName()`
+         // Is the `name` tag generic?
+         //
+         // Arguments
+         //   `tags`: `Object` containing the feature's OSM tags
+         // Returns
+         //   `true` if it is generic, `false` if not
+         //
+         isGenericName: function isGenericName(tags) {
+           return _isGenericName(tags);
+         },
+         // `upgradeTags()`
+         // Suggest tag upgrades.
+         // This function will not modify the input tags, it makes a copy.
+         //
+         // Arguments
+         //   `tags`: `Object` containing the feature's OSM tags
+         //   `loc`: Location where this feature exists, as a [lon, lat]
+         // Returns
+         //   `Object` containing the result, or `null` if no changes needed:
+         //   {
+         //     'newTags': `Object` - The tags the the feature should have
+         //     'matched': `Object` - The matched item
+         //   }
+         //
+         upgradeTags: function upgradeTags(tags, loc) {
+           return _upgradeTags(tags, loc);
+         },
+         // `cache()`
+         // Direct access to the NSI cache, useful for testing or breaking things
+         //
+         // Returns
+         //   `Object`: the internal NSI cache
+         //
+         cache: function cache() {
+           return _nsi;

          }
        };
 
          }
        };
 

-       var staticAccessors$19 = { serialVersionUID: { configurable: true },maximumPreciseValue: { configurable: true } };
-       PrecisionModel.prototype.equals = function equals (other) {
-         if (!(other instanceof PrecisionModel)) {
-           return false
-         }
-         var otherPrecisionModel = other;
-         return this._modelType === otherPrecisionModel._modelType && this._scale === otherPrecisionModel._scale
-       };
-       PrecisionModel.prototype.compareTo = function compareTo (o) {
-         var other = o;
-         var sigDigits = this.getMaximumSignificantDigits();
-         var otherSigDigits = other.getMaximumSignificantDigits();
-         return new Integer(sigDigits).compareTo(new Integer(otherSigDigits))
-       };
-       PrecisionModel.prototype.getScale = function getScale () {
-         return this._scale
-       };
-       PrecisionModel.prototype.isFloating = function isFloating () {
-         return this._modelType === PrecisionModel.FLOATING || this._modelType === PrecisionModel.FLOATING_SINGLE
-       };
-       PrecisionModel.prototype.getType = function getType () {
-         return this._modelType
-       };
-       PrecisionModel.prototype.toString = function toString () {
-         var description = 'UNKNOWN';
-         if (this._modelType === PrecisionModel.FLOATING) {
-           description = 'Floating';
-         } else if (this._modelType === PrecisionModel.FLOATING_SINGLE) {
-           description = 'Floating-Single';
-         } else if (this._modelType === PrecisionModel.FIXED) {
-           description = 'Fixed (Scale=' + this.getScale() + ')';
-         }
-         return description
-       };
-       PrecisionModel.prototype.makePrecise = function makePrecise () {
-         if (typeof arguments[0] === 'number') {
-           var val = arguments[0];
-           if (Double.isNaN(val)) { return val }
-           if (this._modelType === PrecisionModel.FLOATING_SINGLE) {
-             var floatSingleVal = val;
-             return floatSingleVal
-           }
-           if (this._modelType === PrecisionModel.FIXED) {
-             return Math.round(val * this._scale) / this._scale
-           }
-           return val
-         } else if (arguments[0] instanceof Coordinate) {
-           var coord = arguments[0];
-           if (this._modelType === PrecisionModel.FLOATING) { return null }
-           coord.x = this.makePrecise(coord.x);
-           coord.y = this.makePrecise(coord.y);
-         }
-       };
-       PrecisionModel.prototype.getMaximumSignificantDigits = function getMaximumSignificantDigits () {
-         var maxSigDigits = 16;
-         if (this._modelType === PrecisionModel.FLOATING) {
-           maxSigDigits = 16;
-         } else if (this._modelType === PrecisionModel.FLOATING_SINGLE) {
-           maxSigDigits = 6;
-         } else if (this._modelType === PrecisionModel.FIXED) {
-           maxSigDigits = 1 + Math.trunc(Math.ceil(Math.log(this.getScale()) / Math.log(10)));
-         }
-         return maxSigDigits
-       };
-       PrecisionModel.prototype.setScale = function setScale (scale) {
-         this._scale = Math.abs(scale);
-       };
-       PrecisionModel.prototype.interfaces_ = function interfaces_ () {
-         return [Serializable, Comparable]
-       };
-       PrecisionModel.prototype.getClass = function getClass () {
-         return PrecisionModel
-       };
-       PrecisionModel.mostPrecise = function mostPrecise (pm1, pm2) {
-         if (pm1.compareTo(pm2) >= 0) { return pm1 }
-         return pm2
-       };
-       staticAccessors$19.serialVersionUID.get = function () { return 7777263578777803835 };
-       staticAccessors$19.maximumPreciseValue.get = function () { return 9007199254740992.0 };
+       var apibase$1 = 'https://openstreetcam.org';
+       var maxResults$1 = 1000;
+       var tileZoom$1 = 14;
+       var tiler$3 = utilTiler().zoomExtent([tileZoom$1, tileZoom$1]).skipNullIsland(true);
+       var dispatch$3 = dispatch$8('loadedImages');
+       var imgZoom = d3_zoom().extent([[0, 0], [320, 240]]).translateExtent([[0, 0], [320, 240]]).scaleExtent([1, 15]);

 
 

-       Object.defineProperties( PrecisionModel, staticAccessors$19 );
+       var _oscCache;

 
 

-       var Type$2 = function Type (name) {
-         this._name = name || null;
-         Type.nameToTypeMap.put(name, this);
-       };
+       var _oscSelectedImage;

 
 

-       var staticAccessors$1$1 = { serialVersionUID: { configurable: true },nameToTypeMap: { configurable: true } };
-       Type$2.prototype.readResolve = function readResolve () {
-         return Type$2.nameToTypeMap.get(this._name)
-       };
-       Type$2.prototype.toString = function toString () {
-         return this._name
-       };
-       Type$2.prototype.interfaces_ = function interfaces_ () {
-         return [Serializable]
-       };
-       Type$2.prototype.getClass = function getClass () {
-         return Type$2
-       };
-       staticAccessors$1$1.serialVersionUID.get = function () { return -5528602631731589822 };
-       staticAccessors$1$1.nameToTypeMap.get = function () { return new HashMap() };
-
-       Object.defineProperties( Type$2, staticAccessors$1$1 );
-
-       PrecisionModel.Type = Type$2;
-       PrecisionModel.FIXED = new Type$2('FIXED');
-       PrecisionModel.FLOATING = new Type$2('FLOATING');
-       PrecisionModel.FLOATING_SINGLE = new Type$2('FLOATING SINGLE');
-
-       var GeometryFactory = function GeometryFactory () {
-         this._precisionModel = new PrecisionModel();
-         this._SRID = 0;
-         this._coordinateSequenceFactory = GeometryFactory.getDefaultCoordinateSequenceFactory();
-
-         if (arguments.length === 0) ; else if (arguments.length === 1) {
-           if (hasInterface(arguments[0], CoordinateSequenceFactory)) {
-             this._coordinateSequenceFactory = arguments[0];
-           } else if (arguments[0] instanceof PrecisionModel) {
-             this._precisionModel = arguments[0];
-           }
-         } else if (arguments.length === 2) {
-           this._precisionModel = arguments[0];
-           this._SRID = arguments[1];
-         } else if (arguments.length === 3) {
-           this._precisionModel = arguments[0];
-           this._SRID = arguments[1];
-           this._coordinateSequenceFactory = arguments[2];
-         }
-       };
+       var _loadViewerPromise$1;

 
 

-       var staticAccessors$2 = { serialVersionUID: { configurable: true } };
-       GeometryFactory.prototype.toGeometry = function toGeometry (envelope) {
-         if (envelope.isNull()) {
-           return this.createPoint(null)
-         }
-         if (envelope.getMinX() === envelope.getMaxX() && envelope.getMinY() === envelope.getMaxY()) {
-           return this.createPoint(new Coordinate(envelope.getMinX(), envelope.getMinY()))
-         }
-         if (envelope.getMinX() === envelope.getMaxX() || envelope.getMinY() === envelope.getMaxY()) {
-           return this.createLineString([new Coordinate(envelope.getMinX(), envelope.getMinY()), new Coordinate(envelope.getMaxX(), envelope.getMaxY())])
-         }
-         return this.createPolygon(this.createLinearRing([new Coordinate(envelope.getMinX(), envelope.getMinY()), new Coordinate(envelope.getMinX(), envelope.getMaxY()), new Coordinate(envelope.getMaxX(), envelope.getMaxY()), new Coordinate(envelope.getMaxX(), envelope.getMinY()), new Coordinate(envelope.getMinX(), envelope.getMinY())]), null)
-       };
-       GeometryFactory.prototype.createLineString = function createLineString (coordinates) {
-         if (!coordinates) { return new LineString(this.getCoordinateSequenceFactory().create([]), this) }
-         else if (coordinates instanceof Array) { return new LineString(this.getCoordinateSequenceFactory().create(coordinates), this) }
-         else if (hasInterface(coordinates, CoordinateSequence)) { return new LineString(coordinates, this) }
-       };
-       GeometryFactory.prototype.createMultiLineString = function createMultiLineString () {
-         if (arguments.length === 0) {
-           return new MultiLineString(null, this)
-         } else if (arguments.length === 1) {
-           var lineStrings = arguments[0];
-           return new MultiLineString(lineStrings, this)
-         }
-       };
-       GeometryFactory.prototype.buildGeometry = function buildGeometry (geomList) {
-         var geomClass = null;
-         var isHeterogeneous = false;
-         var hasGeometryCollection = false;
-         for (var i = geomList.iterator(); i.hasNext();) {
-           var geom = i.next();
-           var partClass = geom.getClass();
-           if (geomClass === null) {
-             geomClass = partClass;
-           }
-           if (partClass !== geomClass) {
-             isHeterogeneous = true;
-           }
-           if (geom.isGeometryCollectionOrDerived()) { hasGeometryCollection = true; }
-         }
-         if (geomClass === null) {
-           return this.createGeometryCollection()
-         }
-         if (isHeterogeneous || hasGeometryCollection) {
-           return this.createGeometryCollection(GeometryFactory.toGeometryArray(geomList))
-         }
-         var geom0 = geomList.iterator().next();
-         var isCollection = geomList.size() > 1;
-         if (isCollection) {
-           if (geom0 instanceof Polygon) {
-             return this.createMultiPolygon(GeometryFactory.toPolygonArray(geomList))
-           } else if (geom0 instanceof LineString) {
-             return this.createMultiLineString(GeometryFactory.toLineStringArray(geomList))
-           } else if (geom0 instanceof Point$1) {
-             return this.createMultiPoint(GeometryFactory.toPointArray(geomList))
-           }
-           Assert.shouldNeverReachHere('Unhandled class: ' + geom0.getClass().getName());
-         }
-         return geom0
-       };
-       GeometryFactory.prototype.createMultiPointFromCoords = function createMultiPointFromCoords (coordinates) {
-         return this.createMultiPoint(coordinates !== null ? this.getCoordinateSequenceFactory().create(coordinates) : null)
-       };
-       GeometryFactory.prototype.createPoint = function createPoint () {
-         if (arguments.length === 0) {
-           return this.createPoint(this.getCoordinateSequenceFactory().create([]))
-         } else if (arguments.length === 1) {
-           if (arguments[0] instanceof Coordinate) {
-             var coordinate = arguments[0];
-             return this.createPoint(coordinate !== null ? this.getCoordinateSequenceFactory().create([coordinate]) : null)
-           } else if (hasInterface(arguments[0], CoordinateSequence)) {
-             var coordinates = arguments[0];
-             return new Point$1(coordinates, this)
-           }
-         }
-       };
-       GeometryFactory.prototype.getCoordinateSequenceFactory = function getCoordinateSequenceFactory () {
-         return this._coordinateSequenceFactory
-       };
-       GeometryFactory.prototype.createPolygon = function createPolygon () {
-         if (arguments.length === 0) {
-           return new Polygon(null, null, this)
-         } else if (arguments.length === 1) {
-           if (hasInterface(arguments[0], CoordinateSequence)) {
-             var coordinates = arguments[0];
-             return this.createPolygon(this.createLinearRing(coordinates))
-           } else if (arguments[0] instanceof Array) {
-             var coordinates$1 = arguments[0];
-             return this.createPolygon(this.createLinearRing(coordinates$1))
-           } else if (arguments[0] instanceof LinearRing) {
-             var shell = arguments[0];
-             return this.createPolygon(shell, null)
-           }
-         } else if (arguments.length === 2) {
-           var shell$1 = arguments[0];
-           var holes = arguments[1];
-           return new Polygon(shell$1, holes, this)
-         }
-       };
-       GeometryFactory.prototype.getSRID = function getSRID () {
-         return this._SRID
-       };
-       GeometryFactory.prototype.createGeometryCollection = function createGeometryCollection () {
-         if (arguments.length === 0) {
-           return new GeometryCollection(null, this)
-         } else if (arguments.length === 1) {
-           var geometries = arguments[0];
-           return new GeometryCollection(geometries, this)
-         }
-       };
-       GeometryFactory.prototype.createGeometry = function createGeometry (g) {
-         var editor = new GeometryEditor(this);
-         return editor.edit(g, {
-           edit: function () {
-             if (arguments.length === 2) {
-               var coordSeq = arguments[0];
-               // const geometry = arguments[1]
-               return this._coordinateSequenceFactory.create(coordSeq)
-             }
-           }
-         })
-       };
-       GeometryFactory.prototype.getPrecisionModel = function getPrecisionModel () {
-         return this._precisionModel
-       };
-       GeometryFactory.prototype.createLinearRing = function createLinearRing () {
-         if (arguments.length === 0) {
-           return this.createLinearRing(this.getCoordinateSequenceFactory().create([]))
-         } else if (arguments.length === 1) {
-           if (arguments[0] instanceof Array) {
-             var coordinates = arguments[0];
-             return this.createLinearRing(coordinates !== null ? this.getCoordinateSequenceFactory().create(coordinates) : null)
-           } else if (hasInterface(arguments[0], CoordinateSequence)) {
-             var coordinates$1 = arguments[0];
-             return new LinearRing(coordinates$1, this)
-           }
-         }
-       };
-       GeometryFactory.prototype.createMultiPolygon = function createMultiPolygon () {
-         if (arguments.length === 0) {
-           return new MultiPolygon(null, this)
-         } else if (arguments.length === 1) {
-           var polygons = arguments[0];
-           return new MultiPolygon(polygons, this)
-         }
-       };
-       GeometryFactory.prototype.createMultiPoint = function createMultiPoint () {
-           var this$1 = this;
-
-         if (arguments.length === 0) {
-           return new MultiPoint(null, this)
-         } else if (arguments.length === 1) {
-           if (arguments[0] instanceof Array) {
-             var point = arguments[0];
-             return new MultiPoint(point, this)
-           } else if (arguments[0] instanceof Array) {
-             var coordinates = arguments[0];
-             return this.createMultiPoint(coordinates !== null ? this.getCoordinateSequenceFactory().create(coordinates) : null)
-           } else if (hasInterface(arguments[0], CoordinateSequence)) {
-             var coordinates$1 = arguments[0];
-             if (coordinates$1 === null) {
-               return this.createMultiPoint(new Array(0).fill(null))
-             }
-             var points = new Array(coordinates$1.size()).fill(null);
-             for (var i = 0; i < coordinates$1.size(); i++) {
-               var ptSeq = this$1.getCoordinateSequenceFactory().create(1, coordinates$1.getDimension());
-               CoordinateSequences.copy(coordinates$1, i, ptSeq, 0, 1);
-               points[i] = this$1.createPoint(ptSeq);
-             }
-             return this.createMultiPoint(points)
-           }
-         }
-       };
-       GeometryFactory.prototype.interfaces_ = function interfaces_ () {
-         return [Serializable]
-       };
-       GeometryFactory.prototype.getClass = function getClass () {
-         return GeometryFactory
-       };
-       GeometryFactory.toMultiPolygonArray = function toMultiPolygonArray (multiPolygons) {
-         var multiPolygonArray = new Array(multiPolygons.size()).fill(null);
-         return multiPolygons.toArray(multiPolygonArray)
-       };
-       GeometryFactory.toGeometryArray = function toGeometryArray (geometries) {
-         if (geometries === null) { return null }
-         var geometryArray = new Array(geometries.size()).fill(null);
-         return geometries.toArray(geometryArray)
-       };
-       GeometryFactory.getDefaultCoordinateSequenceFactory = function getDefaultCoordinateSequenceFactory () {
-         return CoordinateArraySequenceFactory.instance()
-       };
-       GeometryFactory.toMultiLineStringArray = function toMultiLineStringArray (multiLineStrings) {
-         var multiLineStringArray = new Array(multiLineStrings.size()).fill(null);
-         return multiLineStrings.toArray(multiLineStringArray)
-       };
-       GeometryFactory.toLineStringArray = function toLineStringArray (lineStrings) {
-         var lineStringArray = new Array(lineStrings.size()).fill(null);
-         return lineStrings.toArray(lineStringArray)
-       };
-       GeometryFactory.toMultiPointArray = function toMultiPointArray (multiPoints) {
-         var multiPointArray = new Array(multiPoints.size()).fill(null);
-         return multiPoints.toArray(multiPointArray)
-       };
-       GeometryFactory.toLinearRingArray = function toLinearRingArray (linearRings) {
-         var linearRingArray = new Array(linearRings.size()).fill(null);
-         return linearRings.toArray(linearRingArray)
-       };
-       GeometryFactory.toPointArray = function toPointArray (points) {
-         var pointArray = new Array(points.size()).fill(null);
-         return points.toArray(pointArray)
-       };
-       GeometryFactory.toPolygonArray = function toPolygonArray (polygons) {
-         var polygonArray = new Array(polygons.size()).fill(null);
-         return polygons.toArray(polygonArray)
-       };
-       GeometryFactory.createPointFromInternalCoord = function createPointFromInternalCoord (coord, exemplar) {
-         exemplar.getPrecisionModel().makePrecise(coord);
-         return exemplar.getFactory().createPoint(coord)
-       };
-       staticAccessors$2.serialVersionUID.get = function () { return -6820524753094095635 };
+       function abortRequest$3(controller) {
+         controller.abort();
+       }

 
 

-       Object.defineProperties( GeometryFactory, staticAccessors$2 );
+       function maxPageAtZoom(z) {
+         if (z < 15) return 2;
+         if (z === 15) return 5;
+         if (z === 16) return 10;
+         if (z === 17) return 20;
+         if (z === 18) return 40;
+         if (z > 18) return 80;
+       }

 
 

-       var geometryTypes = ['Point', 'MultiPoint', 'LineString', 'MultiLineString', 'Polygon', 'MultiPolygon'];
+       function loadTiles$1(which, url, projection) {
+         var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
+         var tiles = tiler$3.getTiles(projection); // abort inflight requests that are no longer needed

 
 

-       /**
-        * Class for reading and writing Well-Known Text.Create a new parser for GeoJSON
-        * NOTE: Adapted from OpenLayers 2.11 implementation.
-        */
+         var cache = _oscCache[which];
+         Object.keys(cache.inflight).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k.indexOf(tile.id + ',') === 0;
+           });

 
 

-       /**
-        * Create a new parser for GeoJSON
-        *
-        * @param {GeometryFactory} geometryFactory
-        * @return An instance of GeoJsonParser.
-        * @constructor
-        * @private
-        */
-       var GeoJSONParser = function GeoJSONParser (geometryFactory) {
-         this.geometryFactory = geometryFactory || new GeometryFactory();
-       };
-       /**
-        * Deserialize a GeoJSON object and return the Geometry or Feature(Collection) with JSTS Geometries
-        *
-        * @param {}
-        *        A GeoJSON object.
-        * @return {} A Geometry instance or object representing a Feature(Collection) with Geometry instances.
-        * @private
-        */
-       GeoJSONParser.prototype.read = function read (json) {
-         var obj;
-         if (typeof json === 'string') {
-           obj = JSON.parse(json);
-         } else {
-           obj = json;
-         }
+           if (!wanted) {
+             abortRequest$3(cache.inflight[k]);
+             delete cache.inflight[k];
+           }
+         });
+         tiles.forEach(function (tile) {
+           loadNextTilePage$1(which, currZoom, url, tile);
+         });
+       }

 
 

-         var type = obj.type;
+       function loadNextTilePage$1(which, currZoom, url, tile) {
+         var cache = _oscCache[which];
+         var bbox = tile.extent.bbox();
+         var maxPages = maxPageAtZoom(currZoom);
+         var nextPage = cache.nextPage[tile.id] || 1;
+         var params = utilQsString({
+           ipp: maxResults$1,
+           page: nextPage,
+           // client_id: clientId,
+           bbTopLeft: [bbox.maxY, bbox.minX].join(','),
+           bbBottomRight: [bbox.minY, bbox.maxX].join(',')
+         }, true);
+         if (nextPage > maxPages) return;
+         var id = tile.id + ',' + String(nextPage);
+         if (cache.loaded[id] || cache.inflight[id]) return;
+         var controller = new AbortController();
+         cache.inflight[id] = controller;
+         var options = {
+           method: 'POST',
+           signal: controller.signal,
+           body: params,
+           headers: {
+             'Content-Type': 'application/x-www-form-urlencoded'
+           }
+         };
+         d3_json(url, options).then(function (data) {
+           cache.loaded[id] = true;
+           delete cache.inflight[id];

 
 

-         if (!parse$2[type]) {
-           throw new Error('Unknown GeoJSON type: ' + obj.type)
-         }
+           if (!data || !data.currentPageItems || !data.currentPageItems.length) {
+             throw new Error('No Data');
+           }

 
 

-         if (geometryTypes.indexOf(type) !== -1) {
-           return parse$2[type].apply(this, [obj.coordinates])
-         } else if (type === 'GeometryCollection') {
-           return parse$2[type].apply(this, [obj.geometries])
-         }
+           var features = data.currentPageItems.map(function (item) {
+             var loc = [+item.lng, +item.lat];
+             var d;

 
 

-         // feature or feature collection
-         return parse$2[type].apply(this, [obj])
-       };
+             if (which === 'images') {
+               d = {
+                 loc: loc,
+                 key: item.id,
+                 ca: +item.heading,
+                 captured_at: item.shot_date || item.date_added,
+                 captured_by: item.username,
+                 imagePath: item.lth_name,
+                 sequence_id: item.sequence_id,
+                 sequence_index: +item.sequence_index
+               }; // cache sequence info

 
 

-       /**
-        * Serialize a Geometry object into GeoJSON
-        *
-        * @param {Geometry}
-        *        geometry A Geometry or array of Geometries.
-        * @return {Object} A GeoJSON object represting the input Geometry/Geometries.
-        * @private
-        */
-       GeoJSONParser.prototype.write = function write (geometry) {
-         var type = geometry.getGeometryType();
+               var seq = _oscCache.sequences[d.sequence_id];

 
 

-         if (!extract[type]) {
-           throw new Error('Geometry is not supported')
-         }
+               if (!seq) {
+                 seq = {
+                   rotation: 0,
+                   images: []
+                 };
+                 _oscCache.sequences[d.sequence_id] = seq;
+               }

 
 

-         return extract[type].apply(this, [geometry])
-       };
+               seq.images[d.sequence_index] = d;
+               _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
+             }

 
 

-       var parse$2 = {
-         /**
-          * Parse a GeoJSON Feature object
-          *
-          * @param {Object}
-          *          obj Object to parse.
-          *
-          * @return {Object} Feature with geometry/bbox converted to JSTS Geometries.
-          */
-         Feature: function (obj) {
-           var feature = {};
+             return {
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
+             };
+           });
+           cache.rtree.load(features);

 
 

-           // copy features
-           for (var key in obj) {
-             feature[key] = obj[key];
+           if (data.currentPageItems.length === maxResults$1) {
+             // more pages to load
+             cache.nextPage[tile.id] = nextPage + 1;
+             loadNextTilePage$1(which, currZoom, url, tile);
+           } else {
+             cache.nextPage[tile.id] = Infinity; // no more pages to load

            }
 
            }
 

-           // parse geometry
-           if (obj.geometry) {
-             var type = obj.geometry.type;
-             if (!parse$2[type]) {
-               throw new Error('Unknown GeoJSON type: ' + obj.type)
-             }
-             feature.geometry = this.read(obj.geometry);
+           if (which === 'images') {
+             dispatch$3.call('loadedImages');

            }
            }

+         })["catch"](function () {
+           cache.loaded[id] = true;
+           delete cache.inflight[id];
+         });
+       } // partition viewport into higher zoom tiles

 
 

-           // bbox
-           if (obj.bbox) {
-             feature.bbox = parse$2.bbox.apply(this, [obj.bbox]);
-           }

 
 

-           return feature
-         },
+       function partitionViewport$1(projection) {
+         var z = geoScaleToZoom(projection.scale());
+         var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5

 
 

-         /**
-          * Parse a GeoJSON FeatureCollection object
-          *
-          * @param {Object}
-          *          obj Object to parse.
-          *
-          * @return {Object} FeatureCollection with geometry/bbox converted to JSTS Geometries.
-          */
-         FeatureCollection: function (obj) {
-           var this$1 = this;
+         var tiler = utilTiler().zoomExtent([z2, z2]);
+         return tiler.getTiles(projection).map(function (tile) {
+           return tile.extent;
+         });
+       } // no more than `limit` results per partition.

 
 

-           var featureCollection = {};

 
 

-           if (obj.features) {
-             featureCollection.features = [];
+       function searchLimited$1(limit, projection, rtree) {
+         limit = limit || 5;
+         return partitionViewport$1(projection).reduce(function (result, extent) {
+           var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+             return d.data;
+           });
+           return found.length ? result.concat(found) : result;
+         }, []);
+       }

 
 

-             for (var i = 0; i < obj.features.length; ++i) {
-               featureCollection.features.push(this$1.read(obj.features[i]));
-             }
+       var serviceOpenstreetcam = {
+         init: function init() {
+           if (!_oscCache) {
+             this.reset();

            }
 
            }
 

-           if (obj.bbox) {
-             featureCollection.bbox = this.parse.bbox.apply(this, [obj.bbox]);
+           this.event = utilRebind(this, dispatch$3, 'on');
+         },
+         reset: function reset() {
+           if (_oscCache) {
+             Object.values(_oscCache.images.inflight).forEach(abortRequest$3);

            }
 
            }
 

-           return featureCollection
+           _oscCache = {
+             images: {
+               inflight: {},
+               loaded: {},
+               nextPage: {},
+               rtree: new RBush(),
+               forImageKey: {}
+             },
+             sequences: {}
+           };
+           _oscSelectedImage = null;

          },
          },

-
-         /**
-          * Convert the ordinates in an array to an array of Coordinates
-          *
-          * @param {Array}
-          *          array Array with {Number}s.
-          *
-          * @return {Array} Array with Coordinates.
-          */
-         coordinates: function (array) {
-           var coordinates = [];
-           for (var i = 0; i < array.length; ++i) {
-             var sub = array[i];
-             coordinates.push(new Coordinate(sub[0], sub[1]));
-           }
-           return coordinates
+         images: function images(projection) {
+           var limit = 5;
+           return searchLimited$1(limit, projection, _oscCache.images.rtree);

          },
          },

+         sequences: function sequences(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           var sequenceKeys = {}; // all sequences for images in viewport

 
 

-         /**
-          * Convert the bbox to a LinearRing
-          *
-          * @param {Array}
-          *          array Array with [xMin, yMin, xMax, yMax].
-          *
-          * @return {Array} Array with Coordinates.
-          */
-         bbox: function (array) {
-           return this.geometryFactory.createLinearRing([
-             new Coordinate(array[0], array[1]),
-             new Coordinate(array[2], array[1]),
-             new Coordinate(array[2], array[3]),
-             new Coordinate(array[0], array[3]),
-             new Coordinate(array[0], array[1])
-           ])
-         },
+           _oscCache.images.rtree.search(bbox).forEach(function (d) {
+             sequenceKeys[d.data.sequence_id] = true;
+           }); // make linestrings from those sequences

 
 

-         /**
-          * Convert an Array with ordinates to a Point
-          *
-          * @param {Array}
-          *          array Array with ordinates.
-          *
-          * @return {Point} Point.
-          */
-         Point: function (array) {
-           var coordinate = new Coordinate(array[0], array[1]);
-           return this.geometryFactory.createPoint(coordinate)
+
+           var lineStrings = [];
+           Object.keys(sequenceKeys).forEach(function (sequenceKey) {
+             var seq = _oscCache.sequences[sequenceKey];
+             var images = seq && seq.images;
+
+             if (images) {
+               lineStrings.push({
+                 type: 'LineString',
+                 coordinates: images.map(function (d) {
+                   return d.loc;
+                 }).filter(Boolean),
+                 properties: {
+                   captured_at: images[0] ? images[0].captured_at : null,
+                   captured_by: images[0] ? images[0].captured_by : null,
+                   key: sequenceKey
+                 }
+               });
+             }
+           });
+           return lineStrings;

          },
          },

+         cachedImage: function cachedImage(imageKey) {
+           return _oscCache.images.forImageKey[imageKey];
+         },
+         loadImages: function loadImages(projection) {
+           var url = apibase$1 + '/1.0/list/nearby-photos/';
+           loadTiles$1('images', url, projection);
+         },
+         ensureViewerLoaded: function ensureViewerLoaded(context) {
+           if (_loadViewerPromise$1) return _loadViewerPromise$1; // add osc-wrapper

 
 

-         /**
-          * Convert an Array with coordinates to a MultiPoint
-          *
-          * @param {Array}
-          *          array Array with coordinates.
-          *
-          * @return {MultiPoint} MultiPoint.
-          */
-         MultiPoint: function (array) {
-           var this$1 = this;
+           var wrap = context.container().select('.photoviewer').selectAll('.osc-wrapper').data([0]);
+           var that = this;
+           var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper osc-wrapper').classed('hide', true).call(imgZoom.on('zoom', zoomPan)).on('dblclick.zoom', null);
+           wrapEnter.append('div').attr('class', 'photo-attribution fillD');
+           var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
+           controlsEnter.append('button').on('click.back', step(-1)).html('◄');
+           controlsEnter.append('button').on('click.rotate-ccw', rotate(-90)).html('⤿');
+           controlsEnter.append('button').on('click.rotate-cw', rotate(90)).html('⤾');
+           controlsEnter.append('button').on('click.forward', step(1)).html('►');
+           wrapEnter.append('div').attr('class', 'osc-image-wrap'); // Register viewer resize handler
+
+           context.ui().photoviewer.on('resize.openstreetcam', function (dimensions) {
+             imgZoom = d3_zoom().extent([[0, 0], dimensions]).translateExtent([[0, 0], dimensions]).scaleExtent([1, 15]).on('zoom', zoomPan);
+           });

 
 

-           var points = [];
-           for (var i = 0; i < array.length; ++i) {
-             points.push(parse$2.Point.apply(this$1, [array[i]]));
+           function zoomPan(d3_event) {
+             var t = d3_event.transform;
+             context.container().select('.photoviewer .osc-image-wrap').call(utilSetTransform, t.x, t.y, t.k);
+           }
+
+           function rotate(deg) {
+             return function () {
+               if (!_oscSelectedImage) return;
+               var sequenceKey = _oscSelectedImage.sequence_id;
+               var sequence = _oscCache.sequences[sequenceKey];
+               if (!sequence) return;
+               var r = sequence.rotation || 0;
+               r += deg;
+               if (r > 180) r -= 360;
+               if (r < -180) r += 360;
+               sequence.rotation = r;
+               var wrap = context.container().select('.photoviewer .osc-wrapper');
+               wrap.transition().duration(100).call(imgZoom.transform, identity$2);
+               wrap.selectAll('.osc-image').transition().duration(100).style('transform', 'rotate(' + r + 'deg)');
+             };

            }
            }

-           return this.geometryFactory.createMultiPoint(points)
+
+           function step(stepBy) {
+             return function () {
+               if (!_oscSelectedImage) return;
+               var sequenceKey = _oscSelectedImage.sequence_id;
+               var sequence = _oscCache.sequences[sequenceKey];
+               if (!sequence) return;
+               var nextIndex = _oscSelectedImage.sequence_index + stepBy;
+               var nextImage = sequence.images[nextIndex];
+               if (!nextImage) return;
+               context.map().centerEase(nextImage.loc);
+               that.selectImage(context, nextImage.key);
+             };
+           } // don't need any async loading so resolve immediately
+
+
+           _loadViewerPromise$1 = Promise.resolve();
+           return _loadViewerPromise$1;

          },
          },

+         showViewer: function showViewer(context) {
+           var viewer = context.container().select('.photoviewer').classed('hide', false);
+           var isHidden = viewer.selectAll('.photo-wrapper.osc-wrapper.hide').size();

 
 

-         /**
-          * Convert an Array with coordinates to a LineString
-          *
-          * @param {Array}
-          *          array Array with coordinates.
-          *
-          * @return {LineString} LineString.
-          */
-         LineString: function (array) {
-           var coordinates = parse$2.coordinates.apply(this, [array]);
-           return this.geometryFactory.createLineString(coordinates)
+           if (isHidden) {
+             viewer.selectAll('.photo-wrapper:not(.osc-wrapper)').classed('hide', true);
+             viewer.selectAll('.photo-wrapper.osc-wrapper').classed('hide', false);
+           }
+
+           return this;

          },
          },

+         hideViewer: function hideViewer(context) {
+           _oscSelectedImage = null;
+           this.updateUrlImage(null);
+           var viewer = context.container().select('.photoviewer');
+           if (!viewer.empty()) viewer.datum(null);
+           viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+           context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
+           return this.setStyles(context, null, true);
+         },
+         selectImage: function selectImage(context, imageKey) {
+           var d = this.cachedImage(imageKey);
+           _oscSelectedImage = d;
+           this.updateUrlImage(imageKey);
+           var viewer = context.container().select('.photoviewer');
+           if (!viewer.empty()) viewer.datum(d);
+           this.setStyles(context, null, true);
+           context.container().selectAll('.icon-sign').classed('currentView', false);
+           if (!d) return this;
+           var wrap = context.container().select('.photoviewer .osc-wrapper');
+           var imageWrap = wrap.selectAll('.osc-image-wrap');
+           var attribution = wrap.selectAll('.photo-attribution').html('');
+           wrap.transition().duration(100).call(imgZoom.transform, identity$2);
+           imageWrap.selectAll('.osc-image').remove();

 
 

-         /**
-          * Convert an Array with coordinates to a MultiLineString
-          *
-          * @param {Array}
-          *          array Array with coordinates.
-          *
-          * @return {MultiLineString} MultiLineString.
-          */
-         MultiLineString: function (array) {
-           var this$1 = this;
+           if (d) {
+             var sequence = _oscCache.sequences[d.sequence_id];
+             var r = sequence && sequence.rotation || 0;
+             imageWrap.append('img').attr('class', 'osc-image').attr('src', apibase$1 + '/' + d.imagePath).style('transform', 'rotate(' + r + 'deg)');

 
 

-           var lineStrings = [];
-           for (var i = 0; i < array.length; ++i) {
-             lineStrings.push(parse$2.LineString.apply(this$1, [array[i]]));
+             if (d.captured_by) {
+               attribution.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://openstreetcam.org/user/' + encodeURIComponent(d.captured_by)).html('@' + d.captured_by);
+               attribution.append('span').html('|');
+             }
+
+             if (d.captured_at) {
+               attribution.append('span').attr('class', 'captured_at').html(localeDateString(d.captured_at));
+               attribution.append('span').html('|');
+             }
+
+             attribution.append('a').attr('class', 'image-link').attr('target', '_blank').attr('href', 'https://openstreetcam.org/details/' + d.sequence_id + '/' + d.sequence_index).html('openstreetcam.org');

            }
            }

-           return this.geometryFactory.createMultiLineString(lineStrings)
-         },

 
 

-         /**
-          * Convert an Array to a Polygon
-          *
-          * @param {Array}
-          *          array Array with shell and holes.
-          *
-          * @return {Polygon} Polygon.
-          */
-         Polygon: function (array) {
-           var this$1 = this;
+           return this;

 
 

-           var shellCoordinates = parse$2.coordinates.apply(this, [array[0]]);
-           var shell = this.geometryFactory.createLinearRing(shellCoordinates);
-           var holes = [];
-           for (var i = 1; i < array.length; ++i) {
-             var hole = array[i];
-             var coordinates = parse$2.coordinates.apply(this$1, [hole]);
-             var linearRing = this$1.geometryFactory.createLinearRing(coordinates);
-             holes.push(linearRing);
+           function localeDateString(s) {
+             if (!s) return null;
+             var options = {
+               day: 'numeric',
+               month: 'short',
+               year: 'numeric'
+             };
+             var d = new Date(s);
+             if (isNaN(d.getTime())) return null;
+             return d.toLocaleDateString(_mainLocalizer.localeCode(), options);

            }
            }

-           return this.geometryFactory.createPolygon(shell, holes)

          },
          },

+         getSelectedImage: function getSelectedImage() {
+           return _oscSelectedImage;
+         },
+         getSequenceKeyForImage: function getSequenceKeyForImage(d) {
+           return d && d.sequence_id;
+         },
+         // Updates the currently highlighted sequence and selected bubble.
+         // Reset is only necessary when interacting with the viewport because
+         // this implicitly changes the currently selected bubble/sequence
+         setStyles: function setStyles(context, hovered, reset) {
+           if (reset) {
+             // reset all layers
+             context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
+             context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
+           }
+
+           var hoveredImageKey = hovered && hovered.key;
+           var hoveredSequenceKey = this.getSequenceKeyForImage(hovered);
+           var hoveredSequence = hoveredSequenceKey && _oscCache.sequences[hoveredSequenceKey];
+           var hoveredImageKeys = hoveredSequence && hoveredSequence.images.map(function (d) {
+             return d.key;
+           }) || [];
+           var viewer = context.container().select('.photoviewer');
+           var selected = viewer.empty() ? undefined : viewer.datum();
+           var selectedImageKey = selected && selected.key;
+           var selectedSequenceKey = this.getSequenceKeyForImage(selected);
+           var selectedSequence = selectedSequenceKey && _oscCache.sequences[selectedSequenceKey];
+           var selectedImageKeys = selectedSequence && selectedSequence.images.map(function (d) {
+             return d.key;
+           }) || []; // highlight sibling viewfields on either the selected or the hovered sequences
+
+           var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
+           context.container().selectAll('.layer-openstreetcam .viewfield-group').classed('highlighted', function (d) {
+             return highlightedImageKeys.indexOf(d.key) !== -1;
+           }).classed('hovered', function (d) {
+             return d.key === hoveredImageKey;
+           }).classed('currentView', function (d) {
+             return d.key === selectedImageKey;
+           });
+           context.container().selectAll('.layer-openstreetcam .sequence').classed('highlighted', function (d) {
+             return d.properties.key === hoveredSequenceKey;
+           }).classed('currentView', function (d) {
+             return d.properties.key === selectedSequenceKey;
+           }); // update viewfields if needed

 
 

-         /**
-          * Convert an Array to a MultiPolygon
-          *
-          * @param {Array}
-          *          array Array of arrays with shell and rings.
-          *
-          * @return {MultiPolygon} MultiPolygon.
-          */
-         MultiPolygon: function (array) {
-           var this$1 = this;
+           context.container().selectAll('.layer-openstreetcam .viewfield-group .viewfield').attr('d', viewfieldPath);

 
 

-           var polygons = [];
-           for (var i = 0; i < array.length; ++i) {
-             var polygon = array[i];
-             polygons.push(parse$2.Polygon.apply(this$1, [polygon]));
+           function viewfieldPath() {
+             var d = this.parentNode.__data__;
+
+             if (d.pano && d.key !== selectedImageKey) {
+               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+             } else {
+               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+             }

            }
            }

-           return this.geometryFactory.createMultiPolygon(polygons)
+
+           return this;

          },
          },

+         updateUrlImage: function updateUrlImage(imageKey) {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);

 
 

-         /**
-          * Convert an Array to a GeometryCollection
-          *
-          * @param {Array}
-          *          array Array of GeoJSON geometries.
-          *
-          * @return {GeometryCollection} GeometryCollection.
-          */
-         GeometryCollection: function (array) {
-           var this$1 = this;
+             if (imageKey) {
+               hash.photo = 'openstreetcam/' + imageKey;
+             } else {
+               delete hash.photo;
+             }

 
 

-           var geometries = [];
-           for (var i = 0; i < array.length; ++i) {
-             var geometry = array[i];
-             geometries.push(this$1.read(geometry));
+             window.location.replace('#' + utilQsString(hash, true));

            }
            }

-           return this.geometryFactory.createGeometryCollection(geometries)
+         },
+         cache: function cache() {
+           return _oscCache;

          }
        };
 
          }
        };
 

-       var extract = {
-         /**
-          * Convert a Coordinate to an Array
-          *
-          * @param {Coordinate}
-          *          coordinate Coordinate to convert.
-          *
-          * @return {Array} Array of ordinates.
-          */
-         coordinate: function (coordinate) {
-           return [coordinate.x, coordinate.y]
-         },
+       var hashes$1 = {exports: {}};

 
 

-         /**
-          * Convert a Point to a GeoJSON object
-          *
-          * @param {Point}
-          *          point Point to convert.
-          *
-          * @return {Array} Array of 2 ordinates (paired to a coordinate).
-          */
-         Point: function (point) {
-           var array = extract.coordinate.apply(this, [point.getCoordinate()]);
-           return {
-             type: 'Point',
-             coordinates: array
+       (function (module, exports) {
+         (function () {
+           var Hashes;
+
+           function utf8Encode(str) {
+             var x,
+                 y,
+                 output = '',
+                 i = -1,
+                 l;
+
+             if (str && str.length) {
+               l = str.length;
+
+               while ((i += 1) < l) {
+                 /* Decode utf-16 surrogate pairs */
+                 x = str.charCodeAt(i);
+                 y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
+
+                 if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
+                   x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
+                   i += 1;
+                 }
+                 /* Encode output as utf-8 */
+
+
+                 if (x <= 0x7F) {
+                   output += String.fromCharCode(x);
+                 } else if (x <= 0x7FF) {
+                   output += String.fromCharCode(0xC0 | x >>> 6 & 0x1F, 0x80 | x & 0x3F);
+                 } else if (x <= 0xFFFF) {
+                   output += String.fromCharCode(0xE0 | x >>> 12 & 0x0F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
+                 } else if (x <= 0x1FFFFF) {
+                   output += String.fromCharCode(0xF0 | x >>> 18 & 0x07, 0x80 | x >>> 12 & 0x3F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
+                 }
+               }
+             }
+
+             return output;
+           }
+
+           function utf8Decode(str) {
+             var i,
+                 ac,
+                 c1,
+                 c2,
+                 c3,
+                 arr = [],
+                 l;
+             i = ac = c1 = c2 = c3 = 0;
+
+             if (str && str.length) {
+               l = str.length;
+               str += '';
+
+               while (i < l) {
+                 c1 = str.charCodeAt(i);
+                 ac += 1;
+
+                 if (c1 < 128) {
+                   arr[ac] = String.fromCharCode(c1);
+                   i += 1;
+                 } else if (c1 > 191 && c1 < 224) {
+                   c2 = str.charCodeAt(i + 1);
+                   arr[ac] = String.fromCharCode((c1 & 31) << 6 | c2 & 63);
+                   i += 2;
+                 } else {
+                   c2 = str.charCodeAt(i + 1);
+                   c3 = str.charCodeAt(i + 2);
+                   arr[ac] = String.fromCharCode((c1 & 15) << 12 | (c2 & 63) << 6 | c3 & 63);
+                   i += 3;
+                 }
+               }
+             }
+
+             return arr.join('');

            }
            }

-         },
+           /**
+            * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+            * to work around bugs in some JS interpreters.
+            */

 
 

-         /**
-          * Convert a MultiPoint to a GeoJSON object
-          *
-          * @param {MultiPoint}
-          *          multipoint MultiPoint to convert.
-          *
-          * @return {Array} Array of coordinates.
-          */
-         MultiPoint: function (multipoint) {
-           var this$1 = this;

 
 

-           var array = [];
-           for (var i = 0; i < multipoint._geometries.length; ++i) {
-             var point = multipoint._geometries[i];
-             var geoJson = extract.Point.apply(this$1, [point]);
-             array.push(geoJson.coordinates);
+           function safe_add(x, y) {
+             var lsw = (x & 0xFFFF) + (y & 0xFFFF),
+                 msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+             return msw << 16 | lsw & 0xFFFF;

            }
            }

-           return {
-             type: 'MultiPoint',
-             coordinates: array
-           }
-         },
+           /**
+            * Bitwise rotate a 32-bit number to the left.
+            */

 
 

-         /**
-          * Convert a LineString to a GeoJSON object
-          *
-          * @param {LineString}
-          *          linestring LineString to convert.
-          *
-          * @return {Array} Array of coordinates.
-          */
-         LineString: function (linestring) {
-           var this$1 = this;

 
 

-           var array = [];
-           var coordinates = linestring.getCoordinates();
-           for (var i = 0; i < coordinates.length; ++i) {
-             var coordinate = coordinates[i];
-             array.push(extract.coordinate.apply(this$1, [coordinate]));
-           }
-           return {
-             type: 'LineString',
-             coordinates: array
+           function bit_rol(num, cnt) {
+             return num << cnt | num >>> 32 - cnt;

            }
            }

-         },
+           /**
+            * Convert a raw string to a hex string
+            */

 
 

-         /**
-          * Convert a MultiLineString to a GeoJSON object
-          *
-          * @param {MultiLineString}
-          *          multilinestring MultiLineString to convert.
-          *
-          * @return {Array} Array of Array of coordinates.
-          */
-         MultiLineString: function (multilinestring) {
-           var this$1 = this;

 
 

-           var array = [];
-           for (var i = 0; i < multilinestring._geometries.length; ++i) {
-             var linestring = multilinestring._geometries[i];
-             var geoJson = extract.LineString.apply(this$1, [linestring]);
-             array.push(geoJson.coordinates);
-           }
-           return {
-             type: 'MultiLineString',
-             coordinates: array
-           }
-         },
+           function rstr2hex(input, hexcase) {
+             var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
+                 output = '',
+                 x,
+                 i = 0,
+                 l = input.length;

 
 

-         /**
-          * Convert a Polygon to a GeoJSON object
-          *
-          * @param {Polygon}
-          *          polygon Polygon to convert.
-          *
-          * @return {Array} Array with shell, holes.
-          */
-         Polygon: function (polygon) {
-           var this$1 = this;
+             for (; i < l; i += 1) {
+               x = input.charCodeAt(i);
+               output += hex_tab.charAt(x >>> 4 & 0x0F) + hex_tab.charAt(x & 0x0F);
+             }

 
 

-           var array = [];
-           var shellGeoJson = extract.LineString.apply(this, [polygon._shell]);
-           array.push(shellGeoJson.coordinates);
-           for (var i = 0; i < polygon._holes.length; ++i) {
-             var hole = polygon._holes[i];
-             var holeGeoJson = extract.LineString.apply(this$1, [hole]);
-             array.push(holeGeoJson.coordinates);
+             return output;

            }
            }

-           return {
-             type: 'Polygon',
-             coordinates: array
-           }
-         },
+           /**
+            * Convert an array of big-endian words to a string
+            */

 
 

-         /**
-          * Convert a MultiPolygon to a GeoJSON object
-          *
-          * @param {MultiPolygon}
-          *          multipolygon MultiPolygon to convert.
-          *
-          * @return {Array} Array of polygons.
-          */
-         MultiPolygon: function (multipolygon) {
-           var this$1 = this;

 
 

-           var array = [];
-           for (var i = 0; i < multipolygon._geometries.length; ++i) {
-             var polygon = multipolygon._geometries[i];
-             var geoJson = extract.Polygon.apply(this$1, [polygon]);
-             array.push(geoJson.coordinates);
-           }
-           return {
-             type: 'MultiPolygon',
-             coordinates: array
-           }
-         },
+           function binb2rstr(input) {
+             var i,
+                 l = input.length * 32,
+                 output = '';

 
 

-         /**
-          * Convert a GeometryCollection to a GeoJSON object
-          *
-          * @param {GeometryCollection}
-          *          collection GeometryCollection to convert.
-          *
-          * @return {Array} Array of geometries.
-          */
-         GeometryCollection: function (collection) {
-           var this$1 = this;
+             for (i = 0; i < l; i += 8) {
+               output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
+             }

 
 

-           var array = [];
-           for (var i = 0; i < collection._geometries.length; ++i) {
-             var geometry = collection._geometries[i];
-             var type = geometry.getGeometryType();
-             array.push(extract[type].apply(this$1, [geometry]));
-           }
-           return {
-             type: 'GeometryCollection',
-             geometries: array
+             return output;

            }
            }

-         }
-       };
+           /**
+            * Convert an array of little-endian words to a string
+            */

 
 

-       /**
-        * Converts a geometry in GeoJSON to a {@link Geometry}.
-        */

 
 

-       /**
-        * A <code>GeoJSONReader</code> is parameterized by a <code>GeometryFactory</code>,
-        * to allow it to create <code>Geometry</code> objects of the appropriate
-        * implementation. In particular, the <code>GeometryFactory</code> determines
-        * the <code>PrecisionModel</code> and <code>SRID</code> that is used.
-        *
-        * @param {GeometryFactory} geometryFactory
-        * @constructor
-        */
-       var GeoJSONReader = function GeoJSONReader (geometryFactory) {
-         this.geometryFactory = geometryFactory || new GeometryFactory();
-         this.precisionModel = this.geometryFactory.getPrecisionModel();
-         this.parser = new GeoJSONParser(this.geometryFactory);
-       };
-       /**
-        * Reads a GeoJSON representation of a {@link Geometry}
-        *
-        * Will also parse GeoJSON Features/FeatureCollections as custom objects.
-        *
-        * @param {Object|String} geoJson a GeoJSON Object or String.
-        * @return {Geometry|Object} a <code>Geometry or Feature/FeatureCollection representation.</code>
-        * @memberof GeoJSONReader
-        */
-       GeoJSONReader.prototype.read = function read (geoJson) {
-         var geometry = this.parser.read(geoJson);
+           function binl2rstr(input) {
+             var i,
+                 l = input.length * 32,
+                 output = '';

 
 

-         if (this.precisionModel.getType() === PrecisionModel.FIXED) {
-           this.reducePrecision(geometry);
-         }
+             for (i = 0; i < l; i += 8) {
+               output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+             }

 
 

-         return geometry
-       };
+             return output;
+           }
+           /**
+            * Convert a raw string to an array of little-endian words
+            * Characters >255 have their high-byte silently ignored.
+            */

 
 

-       // NOTE: this is a hack
-       GeoJSONReader.prototype.reducePrecision = function reducePrecision (geometry) {
-           var this$1 = this;

 
 

-         var i, len;
+           function rstr2binl(input) {
+             var i,
+                 l = input.length * 8,
+                 output = Array(input.length >> 2),
+                 lo = output.length;

 
 

-         if (geometry.coordinate) {
-           this.precisionModel.makePrecise(geometry.coordinate);
-         } else if (geometry.points) {
-           for (i = 0, len = geometry.points.length; i < len; i++) {
-             this$1.precisionModel.makePrecise(geometry.points[i]);
-           }
-         } else if (geometry.geometries) {
-           for (i = 0, len = geometry.geometries.length; i < len; i++) {
-             this$1.reducePrecision(geometry.geometries[i]);
+             for (i = 0; i < lo; i += 1) {
+               output[i] = 0;
+             }
+
+             for (i = 0; i < l; i += 8) {
+               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
+             }
+
+             return output;

            }
            }

-         }
-       };
+           /**
+            * Convert a raw string to an array of big-endian words
+            * Characters >255 have their high-byte silently ignored.
+            */

 
 

-       /**
-        * @module GeoJSONWriter
-        */

 
 

-       /**
-        * Writes the GeoJSON representation of a {@link Geometry}. The
-        * The GeoJSON format is defined <A
-        * HREF="http://geojson.org/geojson-spec.html">here</A>.
-        */
+           function rstr2binb(input) {
+             var i,
+                 l = input.length * 8,
+                 output = Array(input.length >> 2),
+                 lo = output.length;

 
 

-       /**
-        * The <code>GeoJSONWriter</code> outputs coordinates rounded to the precision
-        * model. Only the maximum number of decimal places necessary to represent the
-        * ordinates to the required precision will be output.
-        *
-        * @param {GeometryFactory} geometryFactory
-        * @constructor
-        */
-       var GeoJSONWriter = function GeoJSONWriter () {
-         this.parser = new GeoJSONParser(this.geometryFactory);
-       };
-       /**
-        * Converts a <code>Geometry</code> to its GeoJSON representation.
-        *
-        * @param {Geometry}
-        *        geometry a <code>Geometry</code> to process.
-        * @return {Object} The GeoJSON representation of the Geometry.
-        * @memberof GeoJSONWriter
-        */
-       GeoJSONWriter.prototype.write = function write (geometry) {
-         return this.parser.write(geometry)
-       };
+             for (i = 0; i < lo; i += 1) {
+               output[i] = 0;
+             }

 
 

-       /* eslint-disable no-undef */
+             for (i = 0; i < l; i += 8) {
+               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
+             }

 
 

-       // io
+             return output;
+           }
+           /**
+            * Convert a raw string to an arbitrary string encoding
+            */

 
 

-       var Position = function Position () {};

 
 

-       var staticAccessors$20 = { ON: { configurable: true },LEFT: { configurable: true },RIGHT: { configurable: true } };
+           function rstr2any(input, encoding) {
+             var divisor = encoding.length,
+                 remainders = Array(),
+                 i,
+                 q,
+                 x,
+                 ld,
+                 quotient,
+                 dividend,
+                 output,
+                 full_length;
+             /* Convert to an array of 16-bit big-endian values, forming the dividend */
+
+             dividend = Array(Math.ceil(input.length / 2));
+             ld = dividend.length;
+
+             for (i = 0; i < ld; i += 1) {
+               dividend[i] = input.charCodeAt(i * 2) << 8 | input.charCodeAt(i * 2 + 1);
+             }
+             /**
+              * Repeatedly perform a long division. The binary array forms the dividend,
+              * the length of the encoding is the divisor. Once computed, the quotient
+              * forms the dividend for the next step. We stop when the dividend is zerHashes.
+              * All remainders are stored for later use.
+              */

 
 

-       Position.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Position.prototype.getClass = function getClass () {
-         return Position
-       };
-       Position.opposite = function opposite (position) {
-         if (position === Position.LEFT) { return Position.RIGHT }
-         if (position === Position.RIGHT) { return Position.LEFT }
-         return position
-       };
-       staticAccessors$20.ON.get = function () { return 0 };
-       staticAccessors$20.LEFT.get = function () { return 1 };
-       staticAccessors$20.RIGHT.get = function () { return 2 };

 
 

-       Object.defineProperties( Position, staticAccessors$20 );
+             while (dividend.length > 0) {
+               quotient = Array();
+               x = 0;

 
 

-       /**
-        * @param {string=} message Optional message
-        * @extends {Error}
-        * @constructor
-        * @private
-        */
-       function EmptyStackException (message) {
-         this.message = message || '';
-       }
-       EmptyStackException.prototype = new Error();
+               for (i = 0; i < dividend.length; i += 1) {
+                 x = (x << 16) + dividend[i];
+                 q = Math.floor(x / divisor);
+                 x -= q * divisor;

 
 

-       /**
-        * @type {string}
-        */
-       EmptyStackException.prototype.name = 'EmptyStackException';
+                 if (quotient.length > 0 || q > 0) {
+                   quotient[quotient.length] = q;
+                 }
+               }

 
 

-       /**
-        * @see http://download.oracle.com/javase/6/docs/api/java/util/Stack.html
-        *
-        * @extends {List}
-        * @constructor
-        * @private
-        */
-       function Stack () {
-         /**
-          * @type {Array}
-          * @private
-          */
-         this.array_ = [];
-       }
-       Stack.prototype = new List();
+               remainders[remainders.length] = x;
+               dividend = quotient;
+             }
+             /* Convert the remainders to the output string */

 
 

-       /**
-        * @override
-        */
-       Stack.prototype.add = function (e) {
-         this.array_.push(e);
-         return true
-       };

 
 

-       /**
-        * @override
-        */
-       Stack.prototype.get = function (index) {
-         if (index < 0 || index >= this.size()) {
-           throw new Error()
-         }
+             output = '';

 
 

-         return this.array_[index]
-       };
+             for (i = remainders.length - 1; i >= 0; i--) {
+               output += encoding.charAt(remainders[i]);
+             }
+             /* Append leading zero equivalents */

 
 

-       /**
-        * Pushes an item onto the top of this stack.
-        * @param {Object} e
-        * @return {Object}
-        */
-       Stack.prototype.push = function (e) {
-         this.array_.push(e);
-         return e
-       };

 
 

-       /**
-        * Pushes an item onto the top of this stack.
-        * @param {Object} e
-        * @return {Object}
-        */
-       Stack.prototype.pop = function (e) {
-         if (this.array_.length === 0) {
-           throw new EmptyStackException()
-         }
+             full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));

 
 

-         return this.array_.pop()
-       };
+             for (i = output.length; i < full_length; i += 1) {
+               output = encoding[0] + output;
+             }

 
 

-       /**
-        * Looks at the object at the top of this stack without removing it from the
-        * stack.
-        * @return {Object}
-        */
-       Stack.prototype.peek = function () {
-         if (this.array_.length === 0) {
-           throw new EmptyStackException()
-         }
+             return output;
+           }
+           /**
+            * Convert a raw string to a base-64 string
+            */

 
 

-         return this.array_[this.array_.length - 1]
-       };

 
 

-       /**
-        * Tests if this stack is empty.
-        * @return {boolean} true if and only if this stack contains no items; false
-        *         otherwise.
-        */
-       Stack.prototype.empty = function () {
-         if (this.array_.length === 0) {
-           return true
-         } else {
-           return false
-         }
-       };
+           function rstr2b64(input, b64pad) {
+             var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
+                 output = '',
+                 len = input.length,
+                 i,
+                 j,
+                 triplet;
+             b64pad = b64pad || '=';
+
+             for (i = 0; i < len; i += 3) {
+               triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
+
+               for (j = 0; j < 4; j += 1) {
+                 if (i * 8 + j * 6 > input.length * 8) {
+                   output += b64pad;
+                 } else {
+                   output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
+                 }
+               }
+             }

 
 

-       /**
-        * @return {boolean}
-        */
-       Stack.prototype.isEmpty = function () {
-         return this.empty()
-       };
+             return output;
+           }

 
 

-       /**
-        * Returns the 1-based position where an object is on this stack. If the object
-        * o occurs as an item in this stack, this method returns the distance from the
-        * top of the stack of the occurrence nearest the top of the stack; the topmost
-        * item on the stack is considered to be at distance 1. The equals method is
-        * used to compare o to the items in this stack.
-        *
-        * NOTE: does not currently actually use equals. (=== is used)
-        *
-        * @param {Object} o
-        * @return {number} the 1-based position from the top of the stack where the
-        *         object is located; the return value -1 indicates that the object is
-        *         not on the stack.
-        */
-       Stack.prototype.search = function (o) {
-         return this.array_.indexOf(o)
-       };
+           Hashes = {
+             /**
+              * @property {String} version
+              * @readonly
+              */
+             VERSION: '1.0.6',

 
 

-       /**
-        * @return {number}
-        * @export
-        */
-       Stack.prototype.size = function () {
-         return this.array_.length
-       };
+             /**
+              * @member Hashes
+              * @class Base64
+              * @constructor
+              */
+             Base64: function Base64() {
+               // private properties
+               var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
+                   pad = '=',
+                   // URL encoding support @todo
+               utf8 = true; // by default enable UTF-8 support encoding
+               // public method for encoding
+
+               this.encode = function (input) {
+                 var i,
+                     j,
+                     triplet,
+                     output = '',
+                     len = input.length;
+                 pad = pad || '=';
+                 input = utf8 ? utf8Encode(input) : input;
+
+                 for (i = 0; i < len; i += 3) {
+                   triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
+
+                   for (j = 0; j < 4; j += 1) {
+                     if (i * 8 + j * 6 > len * 8) {
+                       output += pad;
+                     } else {
+                       output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
+                     }
+                   }
+                 }

 
 

-       /**
-        * @return {Array}
-        */
-       Stack.prototype.toArray = function () {
-         var this$1 = this;
+                 return output;
+               }; // public method for decoding
+
+
+               this.decode = function (input) {
+                 // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+                 var i,
+                     o1,
+                     o2,
+                     o3,
+                     h1,
+                     h2,
+                     h3,
+                     h4,
+                     bits,
+                     ac,
+                     dec = '',
+                     arr = [];
+
+                 if (!input) {
+                   return input;
+                 }

 
 

-         var array = [];
+                 i = ac = 0;
+                 input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
+                 //input += '';
+
+                 do {
+                   // unpack four hexets into three octets using index points in b64
+                   h1 = tab.indexOf(input.charAt(i += 1));
+                   h2 = tab.indexOf(input.charAt(i += 1));
+                   h3 = tab.indexOf(input.charAt(i += 1));
+                   h4 = tab.indexOf(input.charAt(i += 1));
+                   bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
+                   o1 = bits >> 16 & 0xff;
+                   o2 = bits >> 8 & 0xff;
+                   o3 = bits & 0xff;
+                   ac += 1;
+
+                   if (h3 === 64) {
+                     arr[ac] = String.fromCharCode(o1);
+                   } else if (h4 === 64) {
+                     arr[ac] = String.fromCharCode(o1, o2);
+                   } else {
+                     arr[ac] = String.fromCharCode(o1, o2, o3);
+                   }
+                 } while (i < input.length);

 
 

-         for (var i = 0, len = this.array_.length; i < len; i++) {
-           array.push(this$1.array_[i]);
-         }
+                 dec = arr.join('');
+                 dec = utf8 ? utf8Decode(dec) : dec;
+                 return dec;
+               }; // set custom pad string

 
 

-         return array
-       };

 
 

-       var RightmostEdgeFinder = function RightmostEdgeFinder () {
-         this._minIndex = -1;
-         this._minCoord = null;
-         this._minDe = null;
-         this._orientedDe = null;
-       };
-       RightmostEdgeFinder.prototype.getCoordinate = function getCoordinate () {
-         return this._minCoord
-       };
-       RightmostEdgeFinder.prototype.getRightmostSide = function getRightmostSide (de, index) {
-         var side = this.getRightmostSideOfSegment(de, index);
-         if (side < 0) { side = this.getRightmostSideOfSegment(de, index - 1); }
-         if (side < 0) {
-           this._minCoord = null;
-           this.checkForRightmostCoordinate(de);
-         }
-         return side
-       };
-       RightmostEdgeFinder.prototype.findRightmostEdgeAtVertex = function findRightmostEdgeAtVertex () {
-         var pts = this._minDe.getEdge().getCoordinates();
-         Assert.isTrue(this._minIndex > 0 && this._minIndex < pts.length, 'rightmost point expected to be interior vertex of edge');
-         var pPrev = pts[this._minIndex - 1];
-         var pNext = pts[this._minIndex + 1];
-         var orientation = CGAlgorithms.computeOrientation(this._minCoord, pNext, pPrev);
-         var usePrev = false;
-         if (pPrev.y < this._minCoord.y && pNext.y < this._minCoord.y && orientation === CGAlgorithms.COUNTERCLOCKWISE) {
-           usePrev = true;
-         } else if (pPrev.y > this._minCoord.y && pNext.y > this._minCoord.y && orientation === CGAlgorithms.CLOCKWISE) {
-           usePrev = true;
-         }
-         if (usePrev) {
-           this._minIndex = this._minIndex - 1;
-         }
-       };
-       RightmostEdgeFinder.prototype.getRightmostSideOfSegment = function getRightmostSideOfSegment (de, i) {
-         var e = de.getEdge();
-         var coord = e.getCoordinates();
-         if (i < 0 || i + 1 >= coord.length) { return -1 }
-         if (coord[i].y === coord[i + 1].y) { return -1 }
-         var pos = Position.LEFT;
-         if (coord[i].y < coord[i + 1].y) { pos = Position.RIGHT; }
-         return pos
-       };
-       RightmostEdgeFinder.prototype.getEdge = function getEdge () {
-         return this._orientedDe
-       };
-       RightmostEdgeFinder.prototype.checkForRightmostCoordinate = function checkForRightmostCoordinate (de) {
-           var this$1 = this;
+               this.setPad = function (str) {
+                 pad = str || pad;
+                 return this;
+               }; // set custom tab string characters

 
 

-         var coord = de.getEdge().getCoordinates();
-         for (var i = 0; i < coord.length - 1; i++) {
-           if (this$1._minCoord === null || coord[i].x > this$1._minCoord.x) {
-             this$1._minDe = de;
-             this$1._minIndex = i;
-             this$1._minCoord = coord[i];
-           }
-         }
-       };
-       RightmostEdgeFinder.prototype.findRightmostEdgeAtNode = function findRightmostEdgeAtNode () {
-         var node = this._minDe.getNode();
-         var star = node.getEdges();
-         this._minDe = star.getRightmostEdge();
-         if (!this._minDe.isForward()) {
-           this._minDe = this._minDe.getSym();
-           this._minIndex = this._minDe.getEdge().getCoordinates().length - 1;
-         }
-       };
-       RightmostEdgeFinder.prototype.findEdge = function findEdge (dirEdgeList) {
-           var this$1 = this;

 
 

-         for (var i = dirEdgeList.iterator(); i.hasNext();) {
-           var de = i.next();
-           if (!de.isForward()) { continue }
-           this$1.checkForRightmostCoordinate(de);
-         }
-         Assert.isTrue(this._minIndex !== 0 || this._minCoord.equals(this._minDe.getCoordinate()), 'inconsistency in rightmost processing');
-         if (this._minIndex === 0) {
-           this.findRightmostEdgeAtNode();
-         } else {
-           this.findRightmostEdgeAtVertex();
-         }
-         this._orientedDe = this._minDe;
-         var rightmostSide = this.getRightmostSide(this._minDe, this._minIndex);
-         if (rightmostSide === Position.LEFT) {
-           this._orientedDe = this._minDe.getSym();
-         }
-       };
-       RightmostEdgeFinder.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       RightmostEdgeFinder.prototype.getClass = function getClass () {
-         return RightmostEdgeFinder
-       };
+               this.setTab = function (str) {
+                 tab = str || tab;
+                 return this;
+               };

 
 

-       var TopologyException = (function (RuntimeException$$1) {
-         function TopologyException (msg, pt) {
-           RuntimeException$$1.call(this, TopologyException.msgWithCoord(msg, pt));
-           this.pt = pt ? new Coordinate(pt) : null;
-           this.name = 'TopologyException';
-         }
+               this.setUTF8 = function (bool) {
+                 if (typeof bool === 'boolean') {
+                   utf8 = bool;
+                 }

 
 

-         if ( RuntimeException$$1 ) { TopologyException.__proto__ = RuntimeException$$1; }
-         TopologyException.prototype = Object.create( RuntimeException$$1 && RuntimeException$$1.prototype );
-         TopologyException.prototype.constructor = TopologyException;
-         TopologyException.prototype.getCoordinate = function getCoordinate () {
-           return this.pt
-         };
-         TopologyException.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         TopologyException.prototype.getClass = function getClass () {
-           return TopologyException
-         };
-         TopologyException.msgWithCoord = function msgWithCoord (msg, pt) {
-           if (!pt) { return msg + ' [ ' + pt + ' ]' }
-           return msg
-         };
+                 return this;
+               };
+             },

 
 

-         return TopologyException;
-       }(RuntimeException));
+             /**
+              * CRC-32 calculation
+              * @member Hashes
+              * @method CRC32
+              * @static
+              * @param {String} str Input String
+              * @return {String}
+              */
+             CRC32: function CRC32(str) {
+               var crc = 0,
+                   x = 0,
+                   y = 0,
+                   table,
+                   i,
+                   iTop;
+               str = utf8Encode(str);
+               table = ['00000000 77073096 EE0E612C 990951BA 076DC419 706AF48F E963A535 9E6495A3 0EDB8832 ', '79DCB8A4 E0D5E91E 97D2D988 09B64C2B 7EB17CBD E7B82D07 90BF1D91 1DB71064 6AB020F2 F3B97148 ', '84BE41DE 1ADAD47D 6DDDE4EB F4D4B551 83D385C7 136C9856 646BA8C0 FD62F97A 8A65C9EC 14015C4F ', '63066CD9 FA0F3D63 8D080DF5 3B6E20C8 4C69105E D56041E4 A2677172 3C03E4D1 4B04D447 D20D85FD ', 'A50AB56B 35B5A8FA 42B2986C DBBBC9D6 ACBCF940 32D86CE3 45DF5C75 DCD60DCF ABD13D59 26D930AC ', '51DE003A C8D75180 BFD06116 21B4F4B5 56B3C423 CFBA9599 B8BDA50F 2802B89E 5F058808 C60CD9B2 ', 'B10BE924 2F6F7C87 58684C11 C1611DAB B6662D3D 76DC4190 01DB7106 98D220BC EFD5102A 71B18589 ', '06B6B51F 9FBFE4A5 E8B8D433 7807C9A2 0F00F934 9609A88E E10E9818 7F6A0DBB 086D3D2D 91646C97 ', 'E6635C01 6B6B51F4 1C6C6162 856530D8 F262004E 6C0695ED 1B01A57B 8208F4C1 F50FC457 65B0D9C6 ', '12B7E950 8BBEB8EA FCB9887C 62DD1DDF 15DA2D49 8CD37CF3 FBD44C65 4DB26158 3AB551CE A3BC0074 ', 'D4BB30E2 4ADFA541 3DD895D7 A4D1C46D D3D6F4FB 4369E96A 346ED9FC AD678846 DA60B8D0 44042D73 ', '33031DE5 AA0A4C5F DD0D7CC9 5005713C 270241AA BE0B1010 C90C2086 5768B525 206F85B3 B966D409 ', 'CE61E49F 5EDEF90E 29D9C998 B0D09822 C7D7A8B4 59B33D17 2EB40D81 B7BD5C3B C0BA6CAD EDB88320 ', '9ABFB3B6 03B6E20C 74B1D29A EAD54739 9DD277AF 04DB2615 73DC1683 E3630B12 94643B84 0D6D6A3E ', '7A6A5AA8 E40ECF0B 9309FF9D 0A00AE27 7D079EB1 F00F9344 8708A3D2 1E01F268 6906C2FE F762575D ', '806567CB 196C3671 6E6B06E7 FED41B76 89D32BE0 10DA7A5A 67DD4ACC F9B9DF6F 8EBEEFF9 17B7BE43 ', '60B08ED5 D6D6A3E8 A1D1937E 38D8C2C4 4FDFF252 D1BB67F1 A6BC5767 3FB506DD 48B2364B D80D2BDA ', 'AF0A1B4C 36034AF6 41047A60 DF60EFC3 A867DF55 316E8EEF 4669BE79 CB61B38C BC66831A 256FD2A0 ', '5268E236 CC0C7795 BB0B4703 220216B9 5505262F C5BA3BBE B2BD0B28 2BB45A92 5CB36A04 C2D7FFA7 ', 'B5D0CF31 2CD99E8B 5BDEAE1D 9B64C2B0 EC63F226 756AA39C 026D930A 9C0906A9 EB0E363F 72076785 ', '05005713 95BF4A82 E2B87A14 7BB12BAE 0CB61B38 92D28E9B E5D5BE0D 7CDCEFB7 0BDBDF21 86D3D2D4 ', 'F1D4E242 68DDB3F8 1FDA836E 81BE16CD F6B9265B 6FB077E1 18B74777 88085AE6 FF0F6A70 66063BCA ', '11010B5C 8F659EFF F862AE69 616BFFD3 166CCF45 A00AE278 D70DD2EE 4E048354 3903B3C2 A7672661 ', 'D06016F7 4969474D 3E6E77DB AED16A4A D9D65ADC 40DF0B66 37D83BF0 A9BCAE53 DEBB9EC5 47B2CF7F ', '30B5FFE9 BDBDF21C CABAC28A 53B39330 24B4A3A6 BAD03605 CDD70693 54DE5729 23D967BF B3667A2E ', 'C4614AB8 5D681B02 2A6F2B94 B40BBE37 C30C8EA1 5A05DF1B 2D02EF8D'].join('');
+               crc = crc ^ -1;
+
+               for (i = 0, iTop = str.length; i < iTop; i += 1) {
+                 y = (crc ^ str.charCodeAt(i)) & 0xFF;
+                 x = '0x' + table.substr(y * 9, 8);
+                 crc = crc >>> 8 ^ x;
+               } // always return a positive number (that's what >>> 0 does)
+
+
+               return (crc ^ -1) >>> 0;
+             },

 
 

-       var LinkedList = function LinkedList () {
-         this.array_ = [];
-       };
-       LinkedList.prototype.addLast = function addLast (e) {
-         this.array_.push(e);
-       };
-       LinkedList.prototype.removeFirst = function removeFirst () {
-         return this.array_.shift()
-       };
-       LinkedList.prototype.isEmpty = function isEmpty () {
-         return this.array_.length === 0
-       };
+             /**
+              * @member Hashes
+              * @class MD5
+              * @constructor
+              * @param {Object} [config]
+              *
+              * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+              * Digest Algorithm, as defined in RFC 1321.
+              * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
+              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+              * See <http://pajhome.org.uk/crypt/md5> for more infHashes.
+              */
+             MD5: function MD5(options) {
+               /**
+                * Private config properties. You may need to tweak these to be compatible with
+                * the server-side, but the defaults work in most cases.
+                * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
+                */
+               var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+                   // hexadecimal output case format. false - lowercase; true - uppercase
+               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+                   // base-64 pad character. Defaults to '=' for strict RFC compliance
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
+               // privileged (public) methods
+
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s), hexcase);
+               };

 
 

-       var BufferSubgraph = function BufferSubgraph () {
-         this._finder = null;
-         this._dirEdgeList = new ArrayList();
-         this._nodes = new ArrayList();
-         this._rightMostCoord = null;
-         this._env = null;
-         this._finder = new RightmostEdgeFinder();
-       };
-       BufferSubgraph.prototype.clearVisitedEdges = function clearVisitedEdges () {
-         for (var it = this._dirEdgeList.iterator(); it.hasNext();) {
-           var de = it.next();
-           de.setVisited(false);
-         }
-       };
-       BufferSubgraph.prototype.getRightmostCoordinate = function getRightmostCoordinate () {
-         return this._rightMostCoord
-       };
-       BufferSubgraph.prototype.computeNodeDepth = function computeNodeDepth (n) {
-           var this$1 = this;
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };

 
 

-         var startEdge = null;
-         for (var i = n.getEdges().iterator(); i.hasNext();) {
-           var de = i.next();
-           if (de.isVisited() || de.getSym().isVisited()) {
-             startEdge = de;
-             break
-           }
-         }
-         if (startEdge === null) { throw new TopologyException('unable to find edge to compute depths at ' + n.getCoordinate()) }
-         n.getEdges().computeDepths(startEdge);
-         for (var i$1 = n.getEdges().iterator(); i$1.hasNext();) {
-           var de$1 = i$1.next();
-           de$1.setVisited(true);
-           this$1.copySymDepths(de$1);
-         }
-       };
-       BufferSubgraph.prototype.computeDepth = function computeDepth (outsideDepth) {
-         this.clearVisitedEdges();
-         var de = this._finder.getEdge();
-         // const n = de.getNode()
-         // const label = de.getLabel()
-         de.setEdgeDepths(Position.RIGHT, outsideDepth);
-         this.copySymDepths(de);
-         this.computeDepths(de);
-       };
-       BufferSubgraph.prototype.create = function create (node) {
-         this.addReachable(node);
-         this._finder.findEdge(this._dirEdgeList);
-         this._rightMostCoord = this._finder.getCoordinate();
-       };
-       BufferSubgraph.prototype.findResultEdges = function findResultEdges () {
-         for (var it = this._dirEdgeList.iterator(); it.hasNext();) {
-           var de = it.next();
-           if (de.getDepth(Position.RIGHT) >= 1 && de.getDepth(Position.LEFT) <= 0 && !de.isInteriorAreaEdge()) {
-             de.setInResult(true);
-           }
-         }
-       };
-       BufferSubgraph.prototype.computeDepths = function computeDepths (startEdge) {
-           var this$1 = this;
-
-         var nodesVisited = new HashSet();
-         var nodeQueue = new LinkedList();
-         var startNode = startEdge.getNode();
-         nodeQueue.addLast(startNode);
-         nodesVisited.add(startNode);
-         startEdge.setVisited(true);
-         while (!nodeQueue.isEmpty()) {
-           var n = nodeQueue.removeFirst();
-           nodesVisited.add(n);
-           this$1.computeNodeDepth(n);
-           for (var i = n.getEdges().iterator(); i.hasNext();) {
-             var de = i.next();
-             var sym = de.getSym();
-             if (sym.isVisited()) { continue }
-             var adjNode = sym.getNode();
-             if (!nodesVisited.contains(adjNode)) {
-               nodeQueue.addLast(adjNode);
-               nodesVisited.add(adjNode);
-             }
-           }
-         }
-       };
-       BufferSubgraph.prototype.compareTo = function compareTo (o) {
-         var graph = o;
-         if (this._rightMostCoord.x < graph._rightMostCoord.x) {
-           return -1
-         }
-         if (this._rightMostCoord.x > graph._rightMostCoord.x) {
-           return 1
-         }
-         return 0
-       };
-       BufferSubgraph.prototype.getEnvelope = function getEnvelope () {
-         if (this._env === null) {
-           var edgeEnv = new Envelope();
-           for (var it = this._dirEdgeList.iterator(); it.hasNext();) {
-             var dirEdge = it.next();
-             var pts = dirEdge.getEdge().getCoordinates();
-             for (var i = 0; i < pts.length - 1; i++) {
-               edgeEnv.expandToInclude(pts[i]);
-             }
-           }
-           this._env = edgeEnv;
-         }
-         return this._env
-       };
-       BufferSubgraph.prototype.addReachable = function addReachable (startNode) {
-           var this$1 = this;
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };

 
 

-         var nodeStack = new Stack();
-         nodeStack.add(startNode);
-         while (!nodeStack.empty()) {
-           var node = nodeStack.pop();
-           this$1.add(node, nodeStack);
-         }
-       };
-       BufferSubgraph.prototype.copySymDepths = function copySymDepths (de) {
-         var sym = de.getSym();
-         sym.setDepth(Position.LEFT, de.getDepth(Position.RIGHT));
-         sym.setDepth(Position.RIGHT, de.getDepth(Position.LEFT));
-       };
-       BufferSubgraph.prototype.add = function add (node, nodeStack) {
-           var this$1 = this;
-
-         node.setVisited(true);
-         this._nodes.add(node);
-         for (var i = node.getEdges().iterator(); i.hasNext();) {
-           var de = i.next();
-           this$1._dirEdgeList.add(de);
-           var sym = de.getSym();
-           var symNode = sym.getNode();
-           if (!symNode.isVisited()) { nodeStack.push(symNode); }
-         }
-       };
-       BufferSubgraph.prototype.getNodes = function getNodes () {
-         return this._nodes
-       };
-       BufferSubgraph.prototype.getDirectedEdges = function getDirectedEdges () {
-         return this._dirEdgeList
-       };
-       BufferSubgraph.prototype.interfaces_ = function interfaces_ () {
-         return [Comparable]
-       };
-       BufferSubgraph.prototype.getClass = function getClass () {
-         return BufferSubgraph
-       };
+               this.raw = function (s) {
+                 return rstr(s);
+               };

 
 

-       var TopologyLocation = function TopologyLocation () {
-         var this$1 = this;
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d), hexcase);
+               };

 
 

-         this.location = null;
-         if (arguments.length === 1) {
-           if (arguments[0] instanceof Array) {
-             var location = arguments[0];
-             this.init(location.length);
-           } else if (Number.isInteger(arguments[0])) {
-             var on = arguments[0];
-             this.init(1);
-             this.location[Position.ON] = on;
-           } else if (arguments[0] instanceof TopologyLocation) {
-             var gl = arguments[0];
-             this.init(gl.location.length);
-             if (gl !== null) {
-               for (var i = 0; i < this.location.length; i++) {
-                 this$1.location[i] = gl.location[i];
-               }
-             }
-           }
-         } else if (arguments.length === 3) {
-           var on$1 = arguments[0];
-           var left = arguments[1];
-           var right = arguments[2];
-           this.init(3);
-           this.location[Position.ON] = on$1;
-           this.location[Position.LEFT] = left;
-           this.location[Position.RIGHT] = right;
-         }
-       };
-       TopologyLocation.prototype.setAllLocations = function setAllLocations (locValue) {
-           var this$1 = this;
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };

 
 

-         for (var i = 0; i < this.location.length; i++) {
-           this$1.location[i] = locValue;
-         }
-       };
-       TopologyLocation.prototype.isNull = function isNull () {
-           var this$1 = this;
+               this.any_hmac = function (k, d, e) {
+                 return rstr2any(rstr_hmac(k, d), e);
+               };
+               /**
+                * Perform a simple self-test to see if the VM is working
+                * @return {String} Hexadecimal hash sample
+                */

 
 

-         for (var i = 0; i < this.location.length; i++) {
-           if (this$1.location[i] !== Location.NONE) { return false }
-         }
-         return true
-       };
-       TopologyLocation.prototype.setAllLocationsIfNull = function setAllLocationsIfNull (locValue) {
-           var this$1 = this;

 
 

-         for (var i = 0; i < this.location.length; i++) {
-           if (this$1.location[i] === Location.NONE) { this$1.location[i] = locValue; }
-         }
-       };
-       TopologyLocation.prototype.isLine = function isLine () {
-         return this.location.length === 1
-       };
-       TopologyLocation.prototype.merge = function merge (gl) {
-           var this$1 = this;
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * Enable/disable uppercase hexadecimal returned string
+                * @param {Boolean}
+                * @return {Object} this
+                */

 
 

-         if (gl.location.length > this.location.length) {
-           var newLoc = new Array(3).fill(null);
-           newLoc[Position.ON] = this.location[Position.ON];
-           newLoc[Position.LEFT] = Location.NONE;
-           newLoc[Position.RIGHT] = Location.NONE;
-           this.location = newLoc;
-         }
-         for (var i = 0; i < this.location.length; i++) {
-           if (this$1.location[i] === Location.NONE && i < gl.location.length) { this$1.location[i] = gl.location[i]; }
-         }
-       };
-       TopologyLocation.prototype.getLocations = function getLocations () {
-         return this.location
-       };
-       TopologyLocation.prototype.flip = function flip () {
-         if (this.location.length <= 1) { return null }
-         var temp = this.location[Position.LEFT];
-         this.location[Position.LEFT] = this.location[Position.RIGHT];
-         this.location[Position.RIGHT] = temp;
-       };
-       TopologyLocation.prototype.toString = function toString () {
-         var buf = new StringBuffer();
-         if (this.location.length > 1) { buf.append(Location.toLocationSymbol(this.location[Position.LEFT])); }
-         buf.append(Location.toLocationSymbol(this.location[Position.ON]));
-         if (this.location.length > 1) { buf.append(Location.toLocationSymbol(this.location[Position.RIGHT])); }
-         return buf.toString()
-       };
-       TopologyLocation.prototype.setLocations = function setLocations (on, left, right) {
-         this.location[Position.ON] = on;
-         this.location[Position.LEFT] = left;
-         this.location[Position.RIGHT] = right;
-       };
-       TopologyLocation.prototype.get = function get (posIndex) {
-         if (posIndex < this.location.length) { return this.location[posIndex] }
-         return Location.NONE
-       };
-       TopologyLocation.prototype.isArea = function isArea () {
-         return this.location.length > 1
-       };
-       TopologyLocation.prototype.isAnyNull = function isAnyNull () {
-           var this$1 = this;

 
 

-         for (var i = 0; i < this.location.length; i++) {
-           if (this$1.location[i] === Location.NONE) { return true }
-         }
-         return false
-       };
-       TopologyLocation.prototype.setLocation = function setLocation () {
-         if (arguments.length === 1) {
-           var locValue = arguments[0];
-           this.setLocation(Position.ON, locValue);
-         } else if (arguments.length === 2) {
-           var locIndex = arguments[0];
-           var locValue$1 = arguments[1];
-           this.location[locIndex] = locValue$1;
-         }
-       };
-       TopologyLocation.prototype.init = function init (size) {
-         this.location = new Array(size).fill(null);
-         this.setAllLocations(Location.NONE);
-       };
-       TopologyLocation.prototype.isEqualOnSide = function isEqualOnSide (le, locIndex) {
-         return this.location[locIndex] === le.location[locIndex]
-       };
-       TopologyLocation.prototype.allPositionsEqual = function allPositionsEqual (loc) {
-           var this$1 = this;
+               this.setUpperCase = function (a) {
+                 if (typeof a === 'boolean') {
+                   hexcase = a;
+                 }

 
 

-         for (var i = 0; i < this.location.length; i++) {
-           if (this$1.location[i] !== loc) { return false }
-         }
-         return true
-       };
-       TopologyLocation.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       TopologyLocation.prototype.getClass = function getClass () {
-         return TopologyLocation
-       };
+                 return this;
+               };
+               /**
+                * Defines a base64 pad string
+                * @param {String} Pad
+                * @return {Object} this
+                */

 
 

-       var Label = function Label () {
-         this.elt = new Array(2).fill(null);
-         if (arguments.length === 1) {
-           if (Number.isInteger(arguments[0])) {
-             var onLoc = arguments[0];
-             this.elt[0] = new TopologyLocation(onLoc);
-             this.elt[1] = new TopologyLocation(onLoc);
-           } else if (arguments[0] instanceof Label) {
-             var lbl = arguments[0];
-             this.elt[0] = new TopologyLocation(lbl.elt[0]);
-             this.elt[1] = new TopologyLocation(lbl.elt[1]);
-           }
-         } else if (arguments.length === 2) {
-           var geomIndex = arguments[0];
-           var onLoc$1 = arguments[1];
-           this.elt[0] = new TopologyLocation(Location.NONE);
-           this.elt[1] = new TopologyLocation(Location.NONE);
-           this.elt[geomIndex].setLocation(onLoc$1);
-         } else if (arguments.length === 3) {
-           var onLoc$2 = arguments[0];
-           var leftLoc = arguments[1];
-           var rightLoc = arguments[2];
-           this.elt[0] = new TopologyLocation(onLoc$2, leftLoc, rightLoc);
-           this.elt[1] = new TopologyLocation(onLoc$2, leftLoc, rightLoc);
-         } else if (arguments.length === 4) {
-           var geomIndex$1 = arguments[0];
-           var onLoc$3 = arguments[1];
-           var leftLoc$1 = arguments[2];
-           var rightLoc$1 = arguments[3];
-           this.elt[0] = new TopologyLocation(Location.NONE, Location.NONE, Location.NONE);
-           this.elt[1] = new TopologyLocation(Location.NONE, Location.NONE, Location.NONE);
-           this.elt[geomIndex$1].setLocations(onLoc$3, leftLoc$1, rightLoc$1);
-         }
-       };
-       Label.prototype.getGeometryCount = function getGeometryCount () {
-         var count = 0;
-         if (!this.elt[0].isNull()) { count++; }
-         if (!this.elt[1].isNull()) { count++; }
-         return count
-       };
-       Label.prototype.setAllLocations = function setAllLocations (geomIndex, location) {
-         this.elt[geomIndex].setAllLocations(location);
-       };
-       Label.prototype.isNull = function isNull (geomIndex) {
-         return this.elt[geomIndex].isNull()
-       };
-       Label.prototype.setAllLocationsIfNull = function setAllLocationsIfNull () {
-         if (arguments.length === 1) {
-           var location = arguments[0];
-           this.setAllLocationsIfNull(0, location);
-           this.setAllLocationsIfNull(1, location);
-         } else if (arguments.length === 2) {
-           var geomIndex = arguments[0];
-           var location$1 = arguments[1];
-           this.elt[geomIndex].setAllLocationsIfNull(location$1);
-         }
-       };
-       Label.prototype.isLine = function isLine (geomIndex) {
-         return this.elt[geomIndex].isLine()
-       };
-       Label.prototype.merge = function merge (lbl) {
-           var this$1 = this;

 
 

-         for (var i = 0; i < 2; i++) {
-           if (this$1.elt[i] === null && lbl.elt[i] !== null) {
-             this$1.elt[i] = new TopologyLocation(lbl.elt[i]);
-           } else {
-             this$1.elt[i].merge(lbl.elt[i]);
-           }
-         }
-       };
-       Label.prototype.flip = function flip () {
-         this.elt[0].flip();
-         this.elt[1].flip();
-       };
-       Label.prototype.getLocation = function getLocation () {
-         if (arguments.length === 1) {
-           var geomIndex = arguments[0];
-           return this.elt[geomIndex].get(Position.ON)
-         } else if (arguments.length === 2) {
-           var geomIndex$1 = arguments[0];
-           var posIndex = arguments[1];
-           return this.elt[geomIndex$1].get(posIndex)
-         }
-       };
-       Label.prototype.toString = function toString () {
-         var buf = new StringBuffer();
-         if (this.elt[0] !== null) {
-           buf.append('A:');
-           buf.append(this.elt[0].toString());
-         }
-         if (this.elt[1] !== null) {
-           buf.append(' B:');
-           buf.append(this.elt[1].toString());
-         }
-         return buf.toString()
-       };
-       Label.prototype.isArea = function isArea () {
-         if (arguments.length === 0) {
-           return this.elt[0].isArea() || this.elt[1].isArea()
-         } else if (arguments.length === 1) {
-           var geomIndex = arguments[0];
-           return this.elt[geomIndex].isArea()
-         }
-       };
-       Label.prototype.isAnyNull = function isAnyNull (geomIndex) {
-         return this.elt[geomIndex].isAnyNull()
-       };
-       Label.prototype.setLocation = function setLocation () {
-         if (arguments.length === 2) {
-           var geomIndex = arguments[0];
-           var location = arguments[1];
-           this.elt[geomIndex].setLocation(Position.ON, location);
-         } else if (arguments.length === 3) {
-           var geomIndex$1 = arguments[0];
-           var posIndex = arguments[1];
-           var location$1 = arguments[2];
-           this.elt[geomIndex$1].setLocation(posIndex, location$1);
-         }
-       };
-       Label.prototype.isEqualOnSide = function isEqualOnSide (lbl, side) {
-         return this.elt[0].isEqualOnSide(lbl.elt[0], side) && this.elt[1].isEqualOnSide(lbl.elt[1], side)
-       };
-       Label.prototype.allPositionsEqual = function allPositionsEqual (geomIndex, loc) {
-         return this.elt[geomIndex].allPositionsEqual(loc)
-       };
-       Label.prototype.toLine = function toLine (geomIndex) {
-         if (this.elt[geomIndex].isArea()) { this.elt[geomIndex] = new TopologyLocation(this.elt[geomIndex].location[0]); }
-       };
-       Label.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Label.prototype.getClass = function getClass () {
-         return Label
-       };
-       Label.toLineLabel = function toLineLabel (label) {
-         var lineLabel = new Label(Location.NONE);
-         for (var i = 0; i < 2; i++) {
-           lineLabel.setLocation(i, label.getLocation(i));
-         }
-         return lineLabel
-       };
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * Defines a base64 pad string
+                * @param {Boolean}
+                * @return {Object} [this]
+                */

 
 

-       var EdgeRing = function EdgeRing () {
-         this._startDe = null;
-         this._maxNodeDegree = -1;
-         this._edges = new ArrayList();
-         this._pts = new ArrayList();
-         this._label = new Label(Location.NONE);
-         this._ring = null;
-         this._isHole = null;
-         this._shell = null;
-         this._holes = new ArrayList();
-         this._geometryFactory = null;
-         var start = arguments[0];
-         var geometryFactory = arguments[1];
-         this._geometryFactory = geometryFactory;
-         this.computePoints(start);
-         this.computeRing();
-       };
-       EdgeRing.prototype.computeRing = function computeRing () {
-           var this$1 = this;

 
 

-         if (this._ring !== null) { return null }
-         var coord = new Array(this._pts.size()).fill(null);
-         for (var i = 0; i < this._pts.size(); i++) {
-           coord[i] = this$1._pts.get(i);
-         }
-         this._ring = this._geometryFactory.createLinearRing(coord);
-         this._isHole = CGAlgorithms.isCCW(this._ring.getCoordinates());
-       };
-       EdgeRing.prototype.isIsolated = function isIsolated () {
-         return this._label.getGeometryCount() === 1
-       };
-       EdgeRing.prototype.computePoints = function computePoints (start) {
-           var this$1 = this;
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }

 
 

-         this._startDe = start;
-         var de = start;
-         var isFirstEdge = true;
-         do {
-           if (de === null) { throw new TopologyException('Found null DirectedEdge') }
-           if (de.getEdgeRing() === this$1) { throw new TopologyException('Directed Edge visited twice during ring-building at ' + de.getCoordinate()) }
-           this$1._edges.add(de);
-           var label = de.getLabel();
-           Assert.isTrue(label.isArea());
-           this$1.mergeLabel(label);
-           this$1.addPoints(de.getEdge(), de.isForward(), isFirstEdge);
-           isFirstEdge = false;
-           this$1.setEdgeRing(de, this$1);
-           de = this$1.getNext(de);
-         } while (de !== this._startDe)
-       };
-       EdgeRing.prototype.getLinearRing = function getLinearRing () {
-         return this._ring
-       };
-       EdgeRing.prototype.getCoordinate = function getCoordinate (i) {
-         return this._pts.get(i)
-       };
-       EdgeRing.prototype.computeMaxNodeDegree = function computeMaxNodeDegree () {
-           var this$1 = this;
+                 return this;
+               }; // private methods

 
 

-         this._maxNodeDegree = 0;
-         var de = this._startDe;
-         do {
-           var node = de.getNode();
-           var degree = node.getEdges().getOutgoingDegree(this$1);
-           if (degree > this$1._maxNodeDegree) { this$1._maxNodeDegree = degree; }
-           de = this$1.getNext(de);
-         } while (de !== this._startDe)
-         this._maxNodeDegree *= 2;
-       };
-       EdgeRing.prototype.addPoints = function addPoints (edge, isForward, isFirstEdge) {
-           var this$1 = this;
+               /**
+                * Calculate the MD5 of a raw string
+                */

 
 

-         var edgePts = edge.getCoordinates();
-         if (isForward) {
-           var startIndex = 1;
-           if (isFirstEdge) { startIndex = 0; }
-           for (var i = startIndex; i < edgePts.length; i++) {
-             this$1._pts.add(edgePts[i]);
-           }
-         } else {
-           var startIndex$1 = edgePts.length - 2;
-           if (isFirstEdge) { startIndex$1 = edgePts.length - 1; }
-           for (var i$1 = startIndex$1; i$1 >= 0; i$1--) {
-             this$1._pts.add(edgePts[i$1]);
-           }
-         }
-       };
-       EdgeRing.prototype.isHole = function isHole () {
-         return this._isHole
-       };
-       EdgeRing.prototype.setInResult = function setInResult () {
-         var de = this._startDe;
-         do {
-           de.getEdge().setInResult(true);
-           de = de.getNext();
-         } while (de !== this._startDe)
-       };
-       EdgeRing.prototype.containsPoint = function containsPoint (p) {
-         var shell = this.getLinearRing();
-         var env = shell.getEnvelopeInternal();
-         if (!env.contains(p)) { return false }
-         if (!CGAlgorithms.isPointInRing(p, shell.getCoordinates())) { return false }
-         for (var i = this._holes.iterator(); i.hasNext();) {
-           var hole = i.next();
-           if (hole.containsPoint(p)) { return false }
-         }
-         return true
-       };
-       EdgeRing.prototype.addHole = function addHole (ring) {
-         this._holes.add(ring);
-       };
-       EdgeRing.prototype.isShell = function isShell () {
-         return this._shell === null
-       };
-       EdgeRing.prototype.getLabel = function getLabel () {
-         return this._label
-       };
-       EdgeRing.prototype.getEdges = function getEdges () {
-         return this._edges
-       };
-       EdgeRing.prototype.getMaxNodeDegree = function getMaxNodeDegree () {
-         if (this._maxNodeDegree < 0) { this.computeMaxNodeDegree(); }
-         return this._maxNodeDegree
-       };
-       EdgeRing.prototype.getShell = function getShell () {
-         return this._shell
-       };
-       EdgeRing.prototype.mergeLabel = function mergeLabel () {
-         if (arguments.length === 1) {
-           var deLabel = arguments[0];
-           this.mergeLabel(deLabel, 0);
-           this.mergeLabel(deLabel, 1);
-         } else if (arguments.length === 2) {
-           var deLabel$1 = arguments[0];
-           var geomIndex = arguments[1];
-           var loc = deLabel$1.getLocation(geomIndex, Position.RIGHT);
-           if (loc === Location.NONE) { return null }
-           if (this._label.getLocation(geomIndex) === Location.NONE) {
-             this._label.setLocation(geomIndex, loc);
-             return null
-           }
-         }
-       };
-       EdgeRing.prototype.setShell = function setShell (shell) {
-         this._shell = shell;
-         if (shell !== null) { shell.addHole(this); }
-       };
-       EdgeRing.prototype.toPolygon = function toPolygon (geometryFactory) {
-           var this$1 = this;

 
 

-         var holeLR = new Array(this._holes.size()).fill(null);
-         for (var i = 0; i < this._holes.size(); i++) {
-           holeLR[i] = this$1._holes.get(i).getLinearRing();
-         }
-         var poly = geometryFactory.createPolygon(this.getLinearRing(), holeLR);
-         return poly
-       };
-       EdgeRing.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       EdgeRing.prototype.getClass = function getClass () {
-         return EdgeRing
-       };
+               function rstr(s) {
+                 s = utf8 ? utf8Encode(s) : s;
+                 return binl2rstr(binl(rstr2binl(s), s.length * 8));
+               }
+               /**
+                * Calculate the HMAC-MD5, of a key and some data (raw strings)
+                */

 
 

-       var MinimalEdgeRing = (function (EdgeRing$$1) {
-         function MinimalEdgeRing () {
-           var start = arguments[0];
-           var geometryFactory = arguments[1];
-           EdgeRing$$1.call(this, start, geometryFactory);
-         }

 
 

-         if ( EdgeRing$$1 ) { MinimalEdgeRing.__proto__ = EdgeRing$$1; }
-         MinimalEdgeRing.prototype = Object.create( EdgeRing$$1 && EdgeRing$$1.prototype );
-         MinimalEdgeRing.prototype.constructor = MinimalEdgeRing;
-         MinimalEdgeRing.prototype.setEdgeRing = function setEdgeRing (de, er) {
-           de.setMinEdgeRing(er);
-         };
-         MinimalEdgeRing.prototype.getNext = function getNext (de) {
-           return de.getNextMin()
-         };
-         MinimalEdgeRing.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         MinimalEdgeRing.prototype.getClass = function getClass () {
-           return MinimalEdgeRing
-         };
+               function rstr_hmac(key, data) {
+                 var bkey, ipad, opad, hash, i;
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 bkey = rstr2binl(key);

 
 

-         return MinimalEdgeRing;
-       }(EdgeRing));
+                 if (bkey.length > 16) {
+                   bkey = binl(bkey, key.length * 8);
+                 }

 
 

-       var MaximalEdgeRing = (function (EdgeRing$$1) {
-         function MaximalEdgeRing () {
-           var start = arguments[0];
-           var geometryFactory = arguments[1];
-           EdgeRing$$1.call(this, start, geometryFactory);
-         }
+                 ipad = Array(16), opad = Array(16);

 
 

-         if ( EdgeRing$$1 ) { MaximalEdgeRing.__proto__ = EdgeRing$$1; }
-         MaximalEdgeRing.prototype = Object.create( EdgeRing$$1 && EdgeRing$$1.prototype );
-         MaximalEdgeRing.prototype.constructor = MaximalEdgeRing;
-         MaximalEdgeRing.prototype.buildMinimalRings = function buildMinimalRings () {
-           var this$1 = this;
+                 for (i = 0; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }

 
 

-           var minEdgeRings = new ArrayList();
-           var de = this._startDe;
-           do {
-             if (de.getMinEdgeRing() === null) {
-               var minEr = new MinimalEdgeRing(de, this$1._geometryFactory);
-               minEdgeRings.add(minEr);
-             }
-             de = de.getNext();
-           } while (de !== this._startDe)
-           return minEdgeRings
-         };
-         MaximalEdgeRing.prototype.setEdgeRing = function setEdgeRing (de, er) {
-           de.setEdgeRing(er);
-         };
-         MaximalEdgeRing.prototype.linkDirectedEdgesForMinimalEdgeRings = function linkDirectedEdgesForMinimalEdgeRings () {
-           var this$1 = this;
+                 hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
+                 return binl2rstr(binl(opad.concat(hash), 512 + 128));
+               }
+               /**
+                * Calculate the MD5 of an array of little-endian words, and a bit length.
+                */
+
+
+               function binl(x, len) {
+                 var i,
+                     olda,
+                     oldb,
+                     oldc,
+                     oldd,
+                     a = 1732584193,
+                     b = -271733879,
+                     c = -1732584194,
+                     d = 271733878;
+                 /* append padding */
+
+                 x[len >> 5] |= 0x80 << len % 32;
+                 x[(len + 64 >>> 9 << 4) + 14] = len;
+
+                 for (i = 0; i < x.length; i += 16) {
+                   olda = a;
+                   oldb = b;
+                   oldc = c;
+                   oldd = d;
+                   a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
+                   d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
+                   c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
+                   b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
+                   a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
+                   d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
+                   c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
+                   b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
+                   a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
+                   d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
+                   c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
+                   b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
+                   a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
+                   d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
+                   c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
+                   b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
+                   a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
+                   d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
+                   c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
+                   b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
+                   a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
+                   d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
+                   c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
+                   b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
+                   a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
+                   d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
+                   c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
+                   b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
+                   a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
+                   d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
+                   c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
+                   b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
+                   a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
+                   d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
+                   c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
+                   b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
+                   a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
+                   d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
+                   c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
+                   b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
+                   a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
+                   d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
+                   c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
+                   b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
+                   a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
+                   d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
+                   c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
+                   b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
+                   a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
+                   d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
+                   c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
+                   b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
+                   a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
+                   d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
+                   c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
+                   b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
+                   a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
+                   d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
+                   c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
+                   b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
+                   a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
+                   d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
+                   c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
+                   b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
+                   a = safe_add(a, olda);
+                   b = safe_add(b, oldb);
+                   c = safe_add(c, oldc);
+                   d = safe_add(d, oldd);
+                 }

 
 

-           var de = this._startDe;
-           do {
-             var node = de.getNode();
-             node.getEdges().linkMinimalDirectedEdges(this$1);
-             de = de.getNext();
-           } while (de !== this._startDe)
-         };
-         MaximalEdgeRing.prototype.getNext = function getNext (de) {
-           return de.getNext()
-         };
-         MaximalEdgeRing.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         MaximalEdgeRing.prototype.getClass = function getClass () {
-           return MaximalEdgeRing
-         };
+                 return Array(a, b, c, d);
+               }
+               /**
+                * These functions implement the four basic operations the algorithm uses.
+                */

 
 

-         return MaximalEdgeRing;
-       }(EdgeRing));

 
 

-       var GraphComponent = function GraphComponent () {
-         this._label = null;
-         this._isInResult = false;
-         this._isCovered = false;
-         this._isCoveredSet = false;
-         this._isVisited = false;
-         if (arguments.length === 0) ; else if (arguments.length === 1) {
-           var label = arguments[0];
-           this._label = label;
-         }
-       };
-       GraphComponent.prototype.setVisited = function setVisited (isVisited) {
-         this._isVisited = isVisited;
-       };
-       GraphComponent.prototype.setInResult = function setInResult (isInResult) {
-         this._isInResult = isInResult;
-       };
-       GraphComponent.prototype.isCovered = function isCovered () {
-         return this._isCovered
-       };
-       GraphComponent.prototype.isCoveredSet = function isCoveredSet () {
-         return this._isCoveredSet
-       };
-       GraphComponent.prototype.setLabel = function setLabel (label) {
-         this._label = label;
-       };
-       GraphComponent.prototype.getLabel = function getLabel () {
-         return this._label
-       };
-       GraphComponent.prototype.setCovered = function setCovered (isCovered) {
-         this._isCovered = isCovered;
-         this._isCoveredSet = true;
-       };
-       GraphComponent.prototype.updateIM = function updateIM (im) {
-         Assert.isTrue(this._label.getGeometryCount() >= 2, 'found partial label');
-         this.computeIM(im);
-       };
-       GraphComponent.prototype.isInResult = function isInResult () {
-         return this._isInResult
-       };
-       GraphComponent.prototype.isVisited = function isVisited () {
-         return this._isVisited
-       };
-       GraphComponent.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       GraphComponent.prototype.getClass = function getClass () {
-         return GraphComponent
-       };
+               function md5_cmn(q, a, b, x, s, t) {
+                 return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
+               }

 
 

-       var Node$1 = (function (GraphComponent$$1) {
-         function Node () {
-           GraphComponent$$1.call(this);
-           this._coord = null;
-           this._edges = null;
-           var coord = arguments[0];
-           var edges = arguments[1];
-           this._coord = coord;
-           this._edges = edges;
-           this._label = new Label(0, Location.NONE);
-         }
-
-         if ( GraphComponent$$1 ) { Node.__proto__ = GraphComponent$$1; }
-         Node.prototype = Object.create( GraphComponent$$1 && GraphComponent$$1.prototype );
-         Node.prototype.constructor = Node;
-         Node.prototype.isIncidentEdgeInResult = function isIncidentEdgeInResult () {
-           for (var it = this.getEdges().getEdges().iterator(); it.hasNext();) {
-             var de = it.next();
-             if (de.getEdge().isInResult()) { return true }
-           }
-           return false
-         };
-         Node.prototype.isIsolated = function isIsolated () {
-           return this._label.getGeometryCount() === 1
-         };
-         Node.prototype.getCoordinate = function getCoordinate () {
-           return this._coord
-         };
-         Node.prototype.print = function print (out) {
-           out.println('node ' + this._coord + ' lbl: ' + this._label);
-         };
-         Node.prototype.computeIM = function computeIM (im) {};
-         Node.prototype.computeMergedLocation = function computeMergedLocation (label2, eltIndex) {
-           var loc = Location.NONE;
-           loc = this._label.getLocation(eltIndex);
-           if (!label2.isNull(eltIndex)) {
-             var nLoc = label2.getLocation(eltIndex);
-             if (loc !== Location.BOUNDARY) { loc = nLoc; }
-           }
-           return loc
-         };
-         Node.prototype.setLabel = function setLabel () {
-           if (arguments.length === 2) {
-             var argIndex = arguments[0];
-             var onLocation = arguments[1];
-             if (this._label === null) {
-               this._label = new Label(argIndex, onLocation);
-             } else { this._label.setLocation(argIndex, onLocation); }
-           } else { return GraphComponent$$1.prototype.setLabel.apply(this, arguments) }
-         };
-         Node.prototype.getEdges = function getEdges () {
-           return this._edges
-         };
-         Node.prototype.mergeLabel = function mergeLabel () {
-           var this$1 = this;
-
-           if (arguments[0] instanceof Node) {
-             var n = arguments[0];
-             this.mergeLabel(n._label);
-           } else if (arguments[0] instanceof Label) {
-             var label2 = arguments[0];
-             for (var i = 0; i < 2; i++) {
-               var loc = this$1.computeMergedLocation(label2, i);
-               var thisLoc = this$1._label.getLocation(i);
-               if (thisLoc === Location.NONE) { this$1._label.setLocation(i, loc); }
-             }
-           }
-         };
-         Node.prototype.add = function add (e) {
-           this._edges.insert(e);
-           e.setNode(this);
-         };
-         Node.prototype.setLabelBoundary = function setLabelBoundary (argIndex) {
-           if (this._label === null) { return null }
-           var loc = Location.NONE;
-           if (this._label !== null) { loc = this._label.getLocation(argIndex); }
-           var newLoc = null;
-           switch (loc) {
-             case Location.BOUNDARY:
-               newLoc = Location.INTERIOR;
-               break
-             case Location.INTERIOR:
-               newLoc = Location.BOUNDARY;
-               break
-             default:
-               newLoc = Location.BOUNDARY;
-               break
-           }
-           this._label.setLocation(argIndex, newLoc);
-         };
-         Node.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         Node.prototype.getClass = function getClass () {
-           return Node
-         };
+               function md5_ff(a, b, c, d, x, s, t) {
+                 return md5_cmn(b & c | ~b & d, a, b, x, s, t);
+               }

 
 

-         return Node;
-       }(GraphComponent));
+               function md5_gg(a, b, c, d, x, s, t) {
+                 return md5_cmn(b & d | c & ~d, a, b, x, s, t);
+               }

 
 

-       var NodeMap = function NodeMap () {
-         this.nodeMap = new TreeMap();
-         this.nodeFact = null;
-         var nodeFact = arguments[0];
-         this.nodeFact = nodeFact;
-       };
-       NodeMap.prototype.find = function find (coord) {
-         return this.nodeMap.get(coord)
-       };
-       NodeMap.prototype.addNode = function addNode () {
-         if (arguments[0] instanceof Coordinate) {
-           var coord = arguments[0];
-           var node = this.nodeMap.get(coord);
-           if (node === null) {
-             node = this.nodeFact.createNode(coord);
-             this.nodeMap.put(coord, node);
-           }
-           return node
-         } else if (arguments[0] instanceof Node$1) {
-           var n = arguments[0];
-           var node$1 = this.nodeMap.get(n.getCoordinate());
-           if (node$1 === null) {
-             this.nodeMap.put(n.getCoordinate(), n);
-             return n
-           }
-           node$1.mergeLabel(n);
-           return node$1
-         }
-       };
-       NodeMap.prototype.print = function print (out) {
-         for (var it = this.iterator(); it.hasNext();) {
-           var n = it.next();
-           n.print(out);
-         }
-       };
-       NodeMap.prototype.iterator = function iterator () {
-         return this.nodeMap.values().iterator()
-       };
-       NodeMap.prototype.values = function values () {
-         return this.nodeMap.values()
-       };
-       NodeMap.prototype.getBoundaryNodes = function getBoundaryNodes (geomIndex) {
-         var bdyNodes = new ArrayList();
-         for (var i = this.iterator(); i.hasNext();) {
-           var node = i.next();
-           if (node.getLabel().getLocation(geomIndex) === Location.BOUNDARY) { bdyNodes.add(node); }
-         }
-         return bdyNodes
-       };
-       NodeMap.prototype.add = function add (e) {
-         var p = e.getCoordinate();
-         var n = this.addNode(p);
-         n.add(e);
-       };
-       NodeMap.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       NodeMap.prototype.getClass = function getClass () {
-         return NodeMap
-       };
+               function md5_hh(a, b, c, d, x, s, t) {
+                 return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+               }

 
 

-       var Quadrant = function Quadrant () {};
+               function md5_ii(a, b, c, d, x, s, t) {
+                 return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
+               }
+             },

 
 

-       var staticAccessors$21 = { NE: { configurable: true },NW: { configurable: true },SW: { configurable: true },SE: { configurable: true } };
+             /**
+              * @member Hashes
+              * @class Hashes.SHA1
+              * @param {Object} [config]
+              * @constructor
+              *
+              * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined in FIPS 180-1
+              * Version 2.2 Copyright Paul Johnston 2000 - 2009.
+              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+              * See http://pajhome.org.uk/crypt/md5 for details.
+              */
+             SHA1: function SHA1(options) {
+               /**
+                * Private config properties. You may need to tweak these to be compatible with
+                * the server-side, but the defaults work in most cases.
+                * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
+                */
+               var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+                   // hexadecimal output case format. false - lowercase; true - uppercase
+               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+                   // base-64 pad character. Defaults to '=' for strict RFC compliance
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
+               // public methods
+
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s), hexcase);
+               };

 
 

-       Quadrant.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Quadrant.prototype.getClass = function getClass () {
-         return Quadrant
-       };
-       Quadrant.isNorthern = function isNorthern (quad) {
-         return quad === Quadrant.NE || quad === Quadrant.NW
-       };
-       Quadrant.isOpposite = function isOpposite (quad1, quad2) {
-         if (quad1 === quad2) { return false }
-         var diff = (quad1 - quad2 + 4) % 4;
-         if (diff === 2) { return true }
-         return false
-       };
-       Quadrant.commonHalfPlane = function commonHalfPlane (quad1, quad2) {
-         if (quad1 === quad2) { return quad1 }
-         var diff = (quad1 - quad2 + 4) % 4;
-         if (diff === 2) { return -1 }
-         var min = quad1 < quad2 ? quad1 : quad2;
-         var max = quad1 > quad2 ? quad1 : quad2;
-         if (min === 0 && max === 3) { return 3 }
-         return min
-       };
-       Quadrant.isInHalfPlane = function isInHalfPlane (quad, halfPlane) {
-         if (halfPlane === Quadrant.SE) {
-           return quad === Quadrant.SE || quad === Quadrant.SW
-         }
-         return quad === halfPlane || quad === halfPlane + 1
-       };
-       Quadrant.quadrant = function quadrant () {
-         if (typeof arguments[0] === 'number' && typeof arguments[1] === 'number') {
-           var dx = arguments[0];
-           var dy = arguments[1];
-           if (dx === 0.0 && dy === 0.0) { throw new IllegalArgumentException('Cannot compute the quadrant for point ( ' + dx + ', ' + dy + ' )') }
-           if (dx >= 0.0) {
-             if (dy >= 0.0) { return Quadrant.NE; } else { return Quadrant.SE }
-           } else {
-             if (dy >= 0.0) { return Quadrant.NW; } else { return Quadrant.SW }
-           }
-         } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Coordinate) {
-           var p0 = arguments[0];
-           var p1 = arguments[1];
-           if (p1.x === p0.x && p1.y === p0.y) { throw new IllegalArgumentException('Cannot compute the quadrant for two identical points ' + p0) }
-           if (p1.x >= p0.x) {
-             if (p1.y >= p0.y) { return Quadrant.NE; } else { return Quadrant.SE }
-           } else {
-             if (p1.y >= p0.y) { return Quadrant.NW; } else { return Quadrant.SW }
-           }
-         }
-       };
-       staticAccessors$21.NE.get = function () { return 0 };
-       staticAccessors$21.NW.get = function () { return 1 };
-       staticAccessors$21.SW.get = function () { return 2 };
-       staticAccessors$21.SE.get = function () { return 3 };
-
-       Object.defineProperties( Quadrant, staticAccessors$21 );
-
-       var EdgeEnd = function EdgeEnd () {
-         this._edge = null;
-         this._label = null;
-         this._node = null;
-         this._p0 = null;
-         this._p1 = null;
-         this._dx = null;
-         this._dy = null;
-         this._quadrant = null;
-         if (arguments.length === 1) {
-           var edge = arguments[0];
-           this._edge = edge;
-         } else if (arguments.length === 3) {
-           var edge$1 = arguments[0];
-           var p0 = arguments[1];
-           var p1 = arguments[2];
-           var label = null;
-           this._edge = edge$1;
-           this.init(p0, p1);
-           this._label = label;
-         } else if (arguments.length === 4) {
-           var edge$2 = arguments[0];
-           var p0$1 = arguments[1];
-           var p1$1 = arguments[2];
-           var label$1 = arguments[3];
-           this._edge = edge$2;
-           this.init(p0$1, p1$1);
-           this._label = label$1;
-         }
-       };
-       EdgeEnd.prototype.compareDirection = function compareDirection (e) {
-         if (this._dx === e._dx && this._dy === e._dy) { return 0 }
-         if (this._quadrant > e._quadrant) { return 1 }
-         if (this._quadrant < e._quadrant) { return -1 }
-         return CGAlgorithms.computeOrientation(e._p0, e._p1, this._p1)
-       };
-       EdgeEnd.prototype.getDy = function getDy () {
-         return this._dy
-       };
-       EdgeEnd.prototype.getCoordinate = function getCoordinate () {
-         return this._p0
-       };
-       EdgeEnd.prototype.setNode = function setNode (node) {
-         this._node = node;
-       };
-       EdgeEnd.prototype.print = function print (out) {
-         var angle = Math.atan2(this._dy, this._dx);
-         var className = this.getClass().getName();
-         var lastDotPos = className.lastIndexOf('.');
-         var name = className.substring(lastDotPos + 1);
-         out.print('  ' + name + ': ' + this._p0 + ' - ' + this._p1 + ' ' + this._quadrant + ':' + angle + '   ' + this._label);
-       };
-       EdgeEnd.prototype.compareTo = function compareTo (obj) {
-         var e = obj;
-         return this.compareDirection(e)
-       };
-       EdgeEnd.prototype.getDirectedCoordinate = function getDirectedCoordinate () {
-         return this._p1
-       };
-       EdgeEnd.prototype.getDx = function getDx () {
-         return this._dx
-       };
-       EdgeEnd.prototype.getLabel = function getLabel () {
-         return this._label
-       };
-       EdgeEnd.prototype.getEdge = function getEdge () {
-         return this._edge
-       };
-       EdgeEnd.prototype.getQuadrant = function getQuadrant () {
-         return this._quadrant
-       };
-       EdgeEnd.prototype.getNode = function getNode () {
-         return this._node
-       };
-       EdgeEnd.prototype.toString = function toString () {
-         var angle = Math.atan2(this._dy, this._dx);
-         var className = this.getClass().getName();
-         var lastDotPos = className.lastIndexOf('.');
-         var name = className.substring(lastDotPos + 1);
-         return '  ' + name + ': ' + this._p0 + ' - ' + this._p1 + ' ' + this._quadrant + ':' + angle + '   ' + this._label
-       };
-       EdgeEnd.prototype.computeLabel = function computeLabel (boundaryNodeRule) {};
-       EdgeEnd.prototype.init = function init (p0, p1) {
-         this._p0 = p0;
-         this._p1 = p1;
-         this._dx = p1.x - p0.x;
-         this._dy = p1.y - p0.y;
-         this._quadrant = Quadrant.quadrant(this._dx, this._dy);
-         Assert.isTrue(!(this._dx === 0 && this._dy === 0), 'EdgeEnd with identical endpoints found');
-       };
-       EdgeEnd.prototype.interfaces_ = function interfaces_ () {
-         return [Comparable]
-       };
-       EdgeEnd.prototype.getClass = function getClass () {
-         return EdgeEnd
-       };
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };

 
 

-       var DirectedEdge = (function (EdgeEnd$$1) {
-         function DirectedEdge () {
-           var edge = arguments[0];
-           var isForward = arguments[1];
-           EdgeEnd$$1.call(this, edge);
-           this._isForward = null;
-           this._isInResult = false;
-           this._isVisited = false;
-           this._sym = null;
-           this._next = null;
-           this._nextMin = null;
-           this._edgeRing = null;
-           this._minEdgeRing = null;
-           this._depth = [0, -999, -999];
-           this._isForward = isForward;
-           if (isForward) {
-             this.init(edge.getCoordinate(0), edge.getCoordinate(1));
-           } else {
-             var n = edge.getNumPoints() - 1;
-             this.init(edge.getCoordinate(n), edge.getCoordinate(n - 1));
-           }
-           this.computeDirectedLabel();
-         }
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };

 
 

-         if ( EdgeEnd$$1 ) { DirectedEdge.__proto__ = EdgeEnd$$1; }
-         DirectedEdge.prototype = Object.create( EdgeEnd$$1 && EdgeEnd$$1.prototype );
-         DirectedEdge.prototype.constructor = DirectedEdge;
-         DirectedEdge.prototype.getNextMin = function getNextMin () {
-           return this._nextMin
-         };
-         DirectedEdge.prototype.getDepth = function getDepth (position) {
-           return this._depth[position]
-         };
-         DirectedEdge.prototype.setVisited = function setVisited (isVisited) {
-           this._isVisited = isVisited;
-         };
-         DirectedEdge.prototype.computeDirectedLabel = function computeDirectedLabel () {
-           this._label = new Label(this._edge.getLabel());
-           if (!this._isForward) { this._label.flip(); }
-         };
-         DirectedEdge.prototype.getNext = function getNext () {
-           return this._next
-         };
-         DirectedEdge.prototype.setDepth = function setDepth (position, depthVal) {
-           if (this._depth[position] !== -999) {
-             if (this._depth[position] !== depthVal) { throw new TopologyException('assigned depths do not match', this.getCoordinate()) }
-           }
-           this._depth[position] = depthVal;
-         };
-         DirectedEdge.prototype.isInteriorAreaEdge = function isInteriorAreaEdge () {
-           var this$1 = this;
+               this.raw = function (s) {
+                 return rstr(s);
+               };

 
 

-           var isInteriorAreaEdge = true;
-           for (var i = 0; i < 2; i++) {
-             if (!(this$1._label.isArea(i) && this$1._label.getLocation(i, Position.LEFT) === Location.INTERIOR && this$1._label.getLocation(i, Position.RIGHT) === Location.INTERIOR)) {
-               isInteriorAreaEdge = false;
-             }
-           }
-           return isInteriorAreaEdge
-         };
-         DirectedEdge.prototype.setNextMin = function setNextMin (nextMin) {
-           this._nextMin = nextMin;
-         };
-         DirectedEdge.prototype.print = function print (out) {
-           EdgeEnd$$1.prototype.print.call(this, out);
-           out.print(' ' + this._depth[Position.LEFT] + '/' + this._depth[Position.RIGHT]);
-           out.print(' (' + this.getDepthDelta() + ')');
-           if (this._isInResult) { out.print(' inResult'); }
-         };
-         DirectedEdge.prototype.setMinEdgeRing = function setMinEdgeRing (minEdgeRing) {
-           this._minEdgeRing = minEdgeRing;
-         };
-         DirectedEdge.prototype.isLineEdge = function isLineEdge () {
-           var isLine = this._label.isLine(0) || this._label.isLine(1);
-           var isExteriorIfArea0 = !this._label.isArea(0) || this._label.allPositionsEqual(0, Location.EXTERIOR);
-           var isExteriorIfArea1 = !this._label.isArea(1) || this._label.allPositionsEqual(1, Location.EXTERIOR);
-           return isLine && isExteriorIfArea0 && isExteriorIfArea1
-         };
-         DirectedEdge.prototype.setEdgeRing = function setEdgeRing (edgeRing) {
-           this._edgeRing = edgeRing;
-         };
-         DirectedEdge.prototype.getMinEdgeRing = function getMinEdgeRing () {
-           return this._minEdgeRing
-         };
-         DirectedEdge.prototype.getDepthDelta = function getDepthDelta () {
-           var depthDelta = this._edge.getDepthDelta();
-           if (!this._isForward) { depthDelta = -depthDelta; }
-           return depthDelta
-         };
-         DirectedEdge.prototype.setInResult = function setInResult (isInResult) {
-           this._isInResult = isInResult;
-         };
-         DirectedEdge.prototype.getSym = function getSym () {
-           return this._sym
-         };
-         DirectedEdge.prototype.isForward = function isForward () {
-           return this._isForward
-         };
-         DirectedEdge.prototype.getEdge = function getEdge () {
-           return this._edge
-         };
-         DirectedEdge.prototype.printEdge = function printEdge (out) {
-           this.print(out);
-           out.print(' ');
-           if (this._isForward) { this._edge.print(out); } else { this._edge.printReverse(out); }
-         };
-         DirectedEdge.prototype.setSym = function setSym (de) {
-           this._sym = de;
-         };
-         DirectedEdge.prototype.setVisitedEdge = function setVisitedEdge (isVisited) {
-           this.setVisited(isVisited);
-           this._sym.setVisited(isVisited);
-         };
-         DirectedEdge.prototype.setEdgeDepths = function setEdgeDepths (position, depth) {
-           var depthDelta = this.getEdge().getDepthDelta();
-           if (!this._isForward) { depthDelta = -depthDelta; }
-           var directionFactor = 1;
-           if (position === Position.LEFT) { directionFactor = -1; }
-           var oppositePos = Position.opposite(position);
-           var delta = depthDelta * directionFactor;
-           var oppositeDepth = depth + delta;
-           this.setDepth(position, depth);
-           this.setDepth(oppositePos, oppositeDepth);
-         };
-         DirectedEdge.prototype.getEdgeRing = function getEdgeRing () {
-           return this._edgeRing
-         };
-         DirectedEdge.prototype.isInResult = function isInResult () {
-           return this._isInResult
-         };
-         DirectedEdge.prototype.setNext = function setNext (next) {
-           this._next = next;
-         };
-         DirectedEdge.prototype.isVisited = function isVisited () {
-           return this._isVisited
-         };
-         DirectedEdge.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         DirectedEdge.prototype.getClass = function getClass () {
-           return DirectedEdge
-         };
-         DirectedEdge.depthFactor = function depthFactor (currLocation, nextLocation) {
-           if (currLocation === Location.EXTERIOR && nextLocation === Location.INTERIOR) { return 1; } else if (currLocation === Location.INTERIOR && nextLocation === Location.EXTERIOR) { return -1 }
-           return 0
-         };
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
+
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
+
+               this.any_hmac = function (k, d, e) {
+                 return rstr2any(rstr_hmac(k, d), e);
+               };
+               /**
+                * Perform a simple self-test to see if the VM is working
+                * @return {String} Hexadecimal hash sample
+                * @public
+                */

 
 

-         return DirectedEdge;
-       }(EdgeEnd));

 
 

-       var NodeFactory = function NodeFactory () {};
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * @description Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */

 
 

-       NodeFactory.prototype.createNode = function createNode (coord) {
-         return new Node$1(coord, null)
-       };
-       NodeFactory.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       NodeFactory.prototype.getClass = function getClass () {
-         return NodeFactory
-       };

 
 

-       var PlanarGraph = function PlanarGraph () {
-         this._edges = new ArrayList();
-         this._nodes = null;
-         this._edgeEndList = new ArrayList();
-         if (arguments.length === 0) {
-           this._nodes = new NodeMap(new NodeFactory());
-         } else if (arguments.length === 1) {
-           var nodeFact = arguments[0];
-           this._nodes = new NodeMap(nodeFact);
-         }
-       };
-       PlanarGraph.prototype.printEdges = function printEdges (out) {
-           var this$1 = this;
+               this.setUpperCase = function (a) {
+                 if (typeof a === 'boolean') {
+                   hexcase = a;
+                 }

 
 

-         out.println('Edges:');
-         for (var i = 0; i < this._edges.size(); i++) {
-           out.println('edge ' + i + ':');
-           var e = this$1._edges.get(i);
-           e.print(out);
-           e.eiList.print(out);
-         }
-       };
-       PlanarGraph.prototype.find = function find (coord) {
-         return this._nodes.find(coord)
-       };
-       PlanarGraph.prototype.addNode = function addNode () {
-         if (arguments[0] instanceof Node$1) {
-           var node = arguments[0];
-           return this._nodes.addNode(node)
-         } else if (arguments[0] instanceof Coordinate) {
-           var coord = arguments[0];
-           return this._nodes.addNode(coord)
-         }
-       };
-       PlanarGraph.prototype.getNodeIterator = function getNodeIterator () {
-         return this._nodes.iterator()
-       };
-       PlanarGraph.prototype.linkResultDirectedEdges = function linkResultDirectedEdges () {
-         for (var nodeit = this._nodes.iterator(); nodeit.hasNext();) {
-           var node = nodeit.next();
-           node.getEdges().linkResultDirectedEdges();
-         }
-       };
-       PlanarGraph.prototype.debugPrintln = function debugPrintln (o) {
-         System.out.println(o);
-       };
-       PlanarGraph.prototype.isBoundaryNode = function isBoundaryNode (geomIndex, coord) {
-         var node = this._nodes.find(coord);
-         if (node === null) { return false }
-         var label = node.getLabel();
-         if (label !== null && label.getLocation(geomIndex) === Location.BOUNDARY) { return true }
-         return false
-       };
-       PlanarGraph.prototype.linkAllDirectedEdges = function linkAllDirectedEdges () {
-         for (var nodeit = this._nodes.iterator(); nodeit.hasNext();) {
-           var node = nodeit.next();
-           node.getEdges().linkAllDirectedEdges();
-         }
-       };
-       PlanarGraph.prototype.matchInSameDirection = function matchInSameDirection (p0, p1, ep0, ep1) {
-         if (!p0.equals(ep0)) { return false }
-         if (CGAlgorithms.computeOrientation(p0, p1, ep1) === CGAlgorithms.COLLINEAR && Quadrant.quadrant(p0, p1) === Quadrant.quadrant(ep0, ep1)) { return true }
-         return false
-       };
-       PlanarGraph.prototype.getEdgeEnds = function getEdgeEnds () {
-         return this._edgeEndList
-       };
-       PlanarGraph.prototype.debugPrint = function debugPrint (o) {
-         System.out.print(o);
-       };
-       PlanarGraph.prototype.getEdgeIterator = function getEdgeIterator () {
-         return this._edges.iterator()
-       };
-       PlanarGraph.prototype.findEdgeInSameDirection = function findEdgeInSameDirection (p0, p1) {
-           var this$1 = this;
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */

 
 

-         for (var i = 0; i < this._edges.size(); i++) {
-           var e = this$1._edges.get(i);
-           var eCoord = e.getCoordinates();
-           if (this$1.matchInSameDirection(p0, p1, eCoord[0], eCoord[1])) { return e }
-           if (this$1.matchInSameDirection(p0, p1, eCoord[eCoord.length - 1], eCoord[eCoord.length - 2])) { return e }
-         }
-         return null
-       };
-       PlanarGraph.prototype.insertEdge = function insertEdge (e) {
-         this._edges.add(e);
-       };
-       PlanarGraph.prototype.findEdgeEnd = function findEdgeEnd (e) {
-         for (var i = this.getEdgeEnds().iterator(); i.hasNext();) {
-           var ee = i.next();
-           if (ee.getEdge() === e) { return ee }
-         }
-         return null
-       };
-       PlanarGraph.prototype.addEdges = function addEdges (edgesToAdd) {
-           var this$1 = this;
-
-         for (var it = edgesToAdd.iterator(); it.hasNext();) {
-           var e = it.next();
-           this$1._edges.add(e);
-           var de1 = new DirectedEdge(e, true);
-           var de2 = new DirectedEdge(e, false);
-           de1.setSym(de2);
-           de2.setSym(de1);
-           this$1.add(de1);
-           this$1.add(de2);
-         }
-       };
-       PlanarGraph.prototype.add = function add (e) {
-         this._nodes.add(e);
-         this._edgeEndList.add(e);
-       };
-       PlanarGraph.prototype.getNodes = function getNodes () {
-         return this._nodes.values()
-       };
-       PlanarGraph.prototype.findEdge = function findEdge (p0, p1) {
-           var this$1 = this;

 
 

-         for (var i = 0; i < this._edges.size(); i++) {
-           var e = this$1._edges.get(i);
-           var eCoord = e.getCoordinates();
-           if (p0.equals(eCoord[0]) && p1.equals(eCoord[1])) { return e }
-         }
-         return null
-       };
-       PlanarGraph.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       PlanarGraph.prototype.getClass = function getClass () {
-         return PlanarGraph
-       };
-       PlanarGraph.linkResultDirectedEdges = function linkResultDirectedEdges (nodes) {
-         for (var nodeit = nodes.iterator(); nodeit.hasNext();) {
-           var node = nodeit.next();
-           node.getEdges().linkResultDirectedEdges();
-         }
-       };
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */

 
 

-       var PolygonBuilder = function PolygonBuilder () {
-         this._geometryFactory = null;
-         this._shellList = new ArrayList();
-         var geometryFactory = arguments[0];
-         this._geometryFactory = geometryFactory;
-       };
-       PolygonBuilder.prototype.sortShellsAndHoles = function sortShellsAndHoles (edgeRings, shellList, freeHoleList) {
-         for (var it = edgeRings.iterator(); it.hasNext();) {
-           var er = it.next();
-           if (er.isHole()) {
-             freeHoleList.add(er);
-           } else {
-             shellList.add(er);
-           }
-         }
-       };
-       PolygonBuilder.prototype.computePolygons = function computePolygons (shellList) {
-           var this$1 = this;

 
 

-         var resultPolyList = new ArrayList();
-         for (var it = shellList.iterator(); it.hasNext();) {
-           var er = it.next();
-           var poly = er.toPolygon(this$1._geometryFactory);
-           resultPolyList.add(poly);
-         }
-         return resultPolyList
-       };
-       PolygonBuilder.prototype.placeFreeHoles = function placeFreeHoles (shellList, freeHoleList) {
-           var this$1 = this;
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }

 
 

-         for (var it = freeHoleList.iterator(); it.hasNext();) {
-           var hole = it.next();
-           if (hole.getShell() === null) {
-             var shell = this$1.findEdgeRingContaining(hole, shellList);
-             if (shell === null) { throw new TopologyException('unable to assign hole to a shell', hole.getCoordinate(0)) }
-             hole.setShell(shell);
-           }
-         }
-       };
-       PolygonBuilder.prototype.buildMinimalEdgeRings = function buildMinimalEdgeRings (maxEdgeRings, shellList, freeHoleList) {
-           var this$1 = this;
-
-         var edgeRings = new ArrayList();
-         for (var it = maxEdgeRings.iterator(); it.hasNext();) {
-           var er = it.next();
-           if (er.getMaxNodeDegree() > 2) {
-             er.linkDirectedEdgesForMinimalEdgeRings();
-             var minEdgeRings = er.buildMinimalRings();
-             var shell = this$1.findShell(minEdgeRings);
-             if (shell !== null) {
-               this$1.placePolygonHoles(shell, minEdgeRings);
-               shellList.add(shell);
-             } else {
-               freeHoleList.addAll(minEdgeRings);
-             }
-           } else {
-             edgeRings.add(er);
-           }
-         }
-         return edgeRings
-       };
-       PolygonBuilder.prototype.containsPoint = function containsPoint (p) {
-         for (var it = this._shellList.iterator(); it.hasNext();) {
-           var er = it.next();
-           if (er.containsPoint(p)) { return true }
-         }
-         return false
-       };
-       PolygonBuilder.prototype.buildMaximalEdgeRings = function buildMaximalEdgeRings (dirEdges) {
-           var this$1 = this;
+                 return this;
+               }; // private methods

 
 

-         var maxEdgeRings = new ArrayList();
-         for (var it = dirEdges.iterator(); it.hasNext();) {
-           var de = it.next();
-           if (de.isInResult() && de.getLabel().isArea()) {
-             if (de.getEdgeRing() === null) {
-               var er = new MaximalEdgeRing(de, this$1._geometryFactory);
-               maxEdgeRings.add(er);
-               er.setInResult();
-             }
-           }
-         }
-         return maxEdgeRings
-       };
-       PolygonBuilder.prototype.placePolygonHoles = function placePolygonHoles (shell, minEdgeRings) {
-         for (var it = minEdgeRings.iterator(); it.hasNext();) {
-           var er = it.next();
-           if (er.isHole()) {
-             er.setShell(shell);
-           }
-         }
-       };
-       PolygonBuilder.prototype.getPolygons = function getPolygons () {
-         var resultPolyList = this.computePolygons(this._shellList);
-         return resultPolyList
-       };
-       PolygonBuilder.prototype.findEdgeRingContaining = function findEdgeRingContaining (testEr, shellList) {
-         var testRing = testEr.getLinearRing();
-         var testEnv = testRing.getEnvelopeInternal();
-         var testPt = testRing.getCoordinateN(0);
-         var minShell = null;
-         var minEnv = null;
-         for (var it = shellList.iterator(); it.hasNext();) {
-           var tryShell = it.next();
-           var tryRing = tryShell.getLinearRing();
-           var tryEnv = tryRing.getEnvelopeInternal();
-           if (minShell !== null) { minEnv = minShell.getLinearRing().getEnvelopeInternal(); }
-           var isContained = false;
-           if (tryEnv.contains(testEnv) && CGAlgorithms.isPointInRing(testPt, tryRing.getCoordinates())) { isContained = true; }
-           if (isContained) {
-             if (minShell === null || minEnv.contains(tryEnv)) {
-               minShell = tryShell;
-             }
-           }
-         }
-         return minShell
-       };
-       PolygonBuilder.prototype.findShell = function findShell (minEdgeRings) {
-         var shellCount = 0;
-         var shell = null;
-         for (var it = minEdgeRings.iterator(); it.hasNext();) {
-           var er = it.next();
-           if (!er.isHole()) {
-             shell = er;
-             shellCount++;
-           }
-         }
-         Assert.isTrue(shellCount <= 1, 'found two shells in MinimalEdgeRing list');
-         return shell
-       };
-       PolygonBuilder.prototype.add = function add () {
-         if (arguments.length === 1) {
-           var graph = arguments[0];
-           this.add(graph.getEdgeEnds(), graph.getNodes());
-         } else if (arguments.length === 2) {
-           var dirEdges = arguments[0];
-           var nodes = arguments[1];
-           PlanarGraph.linkResultDirectedEdges(nodes);
-           var maxEdgeRings = this.buildMaximalEdgeRings(dirEdges);
-           var freeHoleList = new ArrayList();
-           var edgeRings = this.buildMinimalEdgeRings(maxEdgeRings, this._shellList, freeHoleList);
-           this.sortShellsAndHoles(edgeRings, this._shellList, freeHoleList);
-           this.placeFreeHoles(this._shellList, freeHoleList);
-         }
-       };
-       PolygonBuilder.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       PolygonBuilder.prototype.getClass = function getClass () {
-         return PolygonBuilder
-       };
+               /**
+                * Calculate the SHA-512 of a raw string
+                */

 
 

-       var Boundable = function Boundable () {};

 
 

-       Boundable.prototype.getBounds = function getBounds () {};
-       Boundable.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Boundable.prototype.getClass = function getClass () {
-         return Boundable
-       };
+               function rstr(s) {
+                 s = utf8 ? utf8Encode(s) : s;
+                 return binb2rstr(binb(rstr2binb(s), s.length * 8));
+               }
+               /**
+                * Calculate the HMAC-SHA1 of a key and some data (raw strings)
+                */

 
 

-       var ItemBoundable = function ItemBoundable () {
-         this._bounds = null;
-         this._item = null;
-         var bounds = arguments[0];
-         var item = arguments[1];
-         this._bounds = bounds;
-         this._item = item;
-       };
-       ItemBoundable.prototype.getItem = function getItem () {
-         return this._item
-       };
-       ItemBoundable.prototype.getBounds = function getBounds () {
-         return this._bounds
-       };
-       ItemBoundable.prototype.interfaces_ = function interfaces_ () {
-         return [Boundable, Serializable]
-       };
-       ItemBoundable.prototype.getClass = function getClass () {
-         return ItemBoundable
-       };

 
 

-       var PriorityQueue = function PriorityQueue () {
-         this._size = null;
-         this._items = null;
-         this._size = 0;
-         this._items = new ArrayList();
-         this._items.add(null);
-       };
-       PriorityQueue.prototype.poll = function poll () {
-         if (this.isEmpty()) { return null }
-         var minItem = this._items.get(1);
-         this._items.set(1, this._items.get(this._size));
-         this._size -= 1;
-         this.reorder(1);
-         return minItem
-       };
-       PriorityQueue.prototype.size = function size () {
-         return this._size
-       };
-       PriorityQueue.prototype.reorder = function reorder (hole) {
-           var this$1 = this;
+               function rstr_hmac(key, data) {
+                 var bkey, ipad, opad, i, hash;
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 bkey = rstr2binb(key);

 
 

-         var child = null;
-         var tmp = this._items.get(hole);
-         for (; hole * 2 <= this._size; hole = child) {
-           child = hole * 2;
-           if (child !== this$1._size && this$1._items.get(child + 1).compareTo(this$1._items.get(child)) < 0) { child++; }
-           if (this$1._items.get(child).compareTo(tmp) < 0) { this$1._items.set(hole, this$1._items.get(child)); } else { break }
-         }
-         this._items.set(hole, tmp);
-       };
-       PriorityQueue.prototype.clear = function clear () {
-         this._size = 0;
-         this._items.clear();
-       };
-       PriorityQueue.prototype.isEmpty = function isEmpty () {
-         return this._size === 0
-       };
-       PriorityQueue.prototype.add = function add (x) {
-           var this$1 = this;
+                 if (bkey.length > 16) {
+                   bkey = binb(bkey, key.length * 8);
+                 }

 
 

-         this._items.add(null);
-         this._size += 1;
-         var hole = this._size;
-         this._items.set(0, x);
-         for (; x.compareTo(this._items.get(Math.trunc(hole / 2))) < 0; hole /= 2) {
-           this$1._items.set(hole, this$1._items.get(Math.trunc(hole / 2)));
-         }
-         this._items.set(hole, x);
-       };
-       PriorityQueue.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       PriorityQueue.prototype.getClass = function getClass () {
-         return PriorityQueue
-       };
+                 ipad = Array(16), opad = Array(16);

 
 

-       var ItemVisitor = function ItemVisitor () {};
+                 for (i = 0; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }

 
 

-       ItemVisitor.prototype.visitItem = function visitItem (item) {};
-       ItemVisitor.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       ItemVisitor.prototype.getClass = function getClass () {
-         return ItemVisitor
-       };
+                 hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
+                 return binb2rstr(binb(opad.concat(hash), 512 + 160));
+               }
+               /**
+                * Calculate the SHA-1 of an array of big-endian words, and a bit length
+                */
+
+
+               function binb(x, len) {
+                 var i,
+                     j,
+                     t,
+                     olda,
+                     oldb,
+                     oldc,
+                     oldd,
+                     olde,
+                     w = Array(80),
+                     a = 1732584193,
+                     b = -271733879,
+                     c = -1732584194,
+                     d = 271733878,
+                     e = -1009589776;
+                 /* append padding */
+
+                 x[len >> 5] |= 0x80 << 24 - len % 32;
+                 x[(len + 64 >> 9 << 4) + 15] = len;
+
+                 for (i = 0; i < x.length; i += 16) {
+                   olda = a;
+                   oldb = b;
+                   oldc = c;
+                   oldd = d;
+                   olde = e;
+
+                   for (j = 0; j < 80; j += 1) {
+                     if (j < 16) {
+                       w[j] = x[i + j];
+                     } else {
+                       w[j] = bit_rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
+                     }

 
 

-       var SpatialIndex = function SpatialIndex () {};
+                     t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)), safe_add(safe_add(e, w[j]), sha1_kt(j)));
+                     e = d;
+                     d = c;
+                     c = bit_rol(b, 30);
+                     b = a;
+                     a = t;
+                   }

 
 

-       SpatialIndex.prototype.insert = function insert (itemEnv, item) {};
-       SpatialIndex.prototype.remove = function remove (itemEnv, item) {};
-       SpatialIndex.prototype.query = function query () {
-         // if (arguments.length === 1) {
-         // const searchEnv = arguments[0]
-         // } else if (arguments.length === 2) {
-         // const searchEnv = arguments[0]
-         // const visitor = arguments[1]
-         // }
-       };
-       SpatialIndex.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       SpatialIndex.prototype.getClass = function getClass () {
-         return SpatialIndex
-       };
+                   a = safe_add(a, olda);
+                   b = safe_add(b, oldb);
+                   c = safe_add(c, oldc);
+                   d = safe_add(d, oldd);
+                   e = safe_add(e, olde);
+                 }

 
 

-       var AbstractNode = function AbstractNode () {
-         this._childBoundables = new ArrayList();
-         this._bounds = null;
-         this._level = null;
-         if (arguments.length === 0) ; else if (arguments.length === 1) {
-           var level = arguments[0];
-           this._level = level;
-         }
-       };
+                 return Array(a, b, c, d, e);
+               }
+               /**
+                * Perform the appropriate triplet combination function for the current
+                * iteration
+                */

 
 

-       var staticAccessors$22 = { serialVersionUID: { configurable: true } };
-       AbstractNode.prototype.getLevel = function getLevel () {
-         return this._level
-       };
-       AbstractNode.prototype.size = function size () {
-         return this._childBoundables.size()
-       };
-       AbstractNode.prototype.getChildBoundables = function getChildBoundables () {
-         return this._childBoundables
-       };
-       AbstractNode.prototype.addChildBoundable = function addChildBoundable (childBoundable) {
-         Assert.isTrue(this._bounds === null);
-         this._childBoundables.add(childBoundable);
-       };
-       AbstractNode.prototype.isEmpty = function isEmpty () {
-         return this._childBoundables.isEmpty()
-       };
-       AbstractNode.prototype.getBounds = function getBounds () {
-         if (this._bounds === null) {
-           this._bounds = this.computeBounds();
-         }
-         return this._bounds
-       };
-       AbstractNode.prototype.interfaces_ = function interfaces_ () {
-         return [Boundable, Serializable]
-       };
-       AbstractNode.prototype.getClass = function getClass () {
-         return AbstractNode
-       };
-       staticAccessors$22.serialVersionUID.get = function () { return 6493722185909573708 };

 
 

-       Object.defineProperties( AbstractNode, staticAccessors$22 );
+               function sha1_ft(t, b, c, d) {
+                 if (t < 20) {
+                   return b & c | ~b & d;
+                 }

 
 

-       var Collections = function Collections () {};
+                 if (t < 40) {
+                   return b ^ c ^ d;
+                 }

 
 

-       Collections.reverseOrder = function reverseOrder () {
-         return {
-           compare: function compare (a, b) {
-             return b.compareTo(a)
-           }
-         }
-       };
-       Collections.min = function min (l) {
-         Collections.sort(l);
-         return l.get(0)
-       };
-       Collections.sort = function sort (l, c) {
-         var a = l.toArray();
-         if (c) {
-           Arrays.sort(a, c);
-         } else {
-           Arrays.sort(a);
-         }
-         var i = l.iterator();
-         for (var pos = 0, alen = a.length; pos < alen; pos++) {
-           i.next();
-           i.set(a[pos]);
-         }
-       };
-       Collections.singletonList = function singletonList (o) {
-         var arrayList = new ArrayList();
-         arrayList.add(o);
-         return arrayList
-       };
+                 if (t < 60) {
+                   return b & c | b & d | c & d;
+                 }

 
 

-       var BoundablePair = function BoundablePair () {
-         this._boundable1 = null;
-         this._boundable2 = null;
-         this._distance = null;
-         this._itemDistance = null;
-         var boundable1 = arguments[0];
-         var boundable2 = arguments[1];
-         var itemDistance = arguments[2];
-         this._boundable1 = boundable1;
-         this._boundable2 = boundable2;
-         this._itemDistance = itemDistance;
-         this._distance = this.distance();
-       };
-       BoundablePair.prototype.expandToQueue = function expandToQueue (priQ, minDistance) {
-         var isComp1 = BoundablePair.isComposite(this._boundable1);
-         var isComp2 = BoundablePair.isComposite(this._boundable2);
-         if (isComp1 && isComp2) {
-           if (BoundablePair.area(this._boundable1) > BoundablePair.area(this._boundable2)) {
-             this.expand(this._boundable1, this._boundable2, priQ, minDistance);
-             return null
-           } else {
-             this.expand(this._boundable2, this._boundable1, priQ, minDistance);
-             return null
-           }
-         } else if (isComp1) {
-           this.expand(this._boundable1, this._boundable2, priQ, minDistance);
-           return null
-         } else if (isComp2) {
-           this.expand(this._boundable2, this._boundable1, priQ, minDistance);
-           return null
-         }
-         throw new IllegalArgumentException('neither boundable is composite')
-       };
-       BoundablePair.prototype.isLeaves = function isLeaves () {
-         return !(BoundablePair.isComposite(this._boundable1) || BoundablePair.isComposite(this._boundable2))
-       };
-       BoundablePair.prototype.compareTo = function compareTo (o) {
-         var nd = o;
-         if (this._distance < nd._distance) { return -1 }
-         if (this._distance > nd._distance) { return 1 }
-         return 0
-       };
-       BoundablePair.prototype.expand = function expand (bndComposite, bndOther, priQ, minDistance) {
-           var this$1 = this;
+                 return b ^ c ^ d;
+               }
+               /**
+                * Determine the appropriate additive constant for the current iteration
+                */

 
 

-         var children = bndComposite.getChildBoundables();
-         for (var i = children.iterator(); i.hasNext();) {
-           var child = i.next();
-           var bp = new BoundablePair(child, bndOther, this$1._itemDistance);
-           if (bp.getDistance() < minDistance) {
-             priQ.add(bp);
-           }
-         }
-       };
-       BoundablePair.prototype.getBoundable = function getBoundable (i) {
-         if (i === 0) { return this._boundable1 }
-         return this._boundable2
-       };
-       BoundablePair.prototype.getDistance = function getDistance () {
-         return this._distance
-       };
-       BoundablePair.prototype.distance = function distance () {
-         if (this.isLeaves()) {
-           return this._itemDistance.distance(this._boundable1, this._boundable2)
-         }
-         return this._boundable1.getBounds().distance(this._boundable2.getBounds())
-       };
-       BoundablePair.prototype.interfaces_ = function interfaces_ () {
-         return [Comparable]
-       };
-       BoundablePair.prototype.getClass = function getClass () {
-         return BoundablePair
-       };
-       BoundablePair.area = function area (b) {
-         return b.getBounds().getArea()
-       };
-       BoundablePair.isComposite = function isComposite (item) {
-         return item instanceof AbstractNode
-       };

 
 

-       var AbstractSTRtree = function AbstractSTRtree () {
-         this._root = null;
-         this._built = false;
-         this._itemBoundables = new ArrayList();
-         this._nodeCapacity = null;
-         if (arguments.length === 0) {
-           var nodeCapacity = AbstractSTRtree.DEFAULT_NODE_CAPACITY;
-           this._nodeCapacity = nodeCapacity;
-         } else if (arguments.length === 1) {
-           var nodeCapacity$1 = arguments[0];
-           Assert.isTrue(nodeCapacity$1 > 1, 'Node capacity must be greater than 1');
-           this._nodeCapacity = nodeCapacity$1;
-         }
-       };
+               function sha1_kt(t) {
+                 return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
+               }
+             },

 
 

-       var staticAccessors$23 = { IntersectsOp: { configurable: true },serialVersionUID: { configurable: true },DEFAULT_NODE_CAPACITY: { configurable: true } };
-       AbstractSTRtree.prototype.getNodeCapacity = function getNodeCapacity () {
-         return this._nodeCapacity
-       };
-       AbstractSTRtree.prototype.lastNode = function lastNode (nodes) {
-         return nodes.get(nodes.size() - 1)
-       };
-       AbstractSTRtree.prototype.size = function size () {
-           var this$1 = this;
+             /**
+              * @class Hashes.SHA256
+              * @param {config}
+              *
+              * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined in FIPS 180-2
+              * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
+              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+              * See http://pajhome.org.uk/crypt/md5 for details.
+              * Also http://anmar.eu.org/projects/jssha2/
+              */
+             SHA256: function SHA256(options) {
+               /**
+                * Private properties configuration variables. You may need to tweak these to be compatible with
+                * the server-side, but the defaults work in most cases.
+                * @see this.setUpperCase() method
+                * @see this.setPad() method
+                */
+               options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
+                   var // hexadecimal output case format. false - lowercase; true - uppercase  */
+               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',

 
 

-         if (arguments.length === 0) {
-           if (this.isEmpty()) {
-             return 0
-           }
-           this.build();
-           return this.size(this._root)
-         } else if (arguments.length === 1) {
-           var node = arguments[0];
-           var size = 0;
-           for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-             var childBoundable = i.next();
-             if (childBoundable instanceof AbstractNode) {
-               size += this$1.size(childBoundable);
-             } else if (childBoundable instanceof ItemBoundable) {
-               size += 1;
-             }
-           }
-           return size
-         }
-       };
-       AbstractSTRtree.prototype.removeItem = function removeItem (node, item) {
-         var childToRemove = null;
-         for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-           var childBoundable = i.next();
-           if (childBoundable instanceof ItemBoundable) {
-             if (childBoundable.getItem() === item) { childToRemove = childBoundable; }
-           }
-         }
-         if (childToRemove !== null) {
-           node.getChildBoundables().remove(childToRemove);
-           return true
-         }
-         return false
-       };
-       AbstractSTRtree.prototype.itemsTree = function itemsTree () {
-           var this$1 = this;
-
-         if (arguments.length === 0) {
-           this.build();
-           var valuesTree = this.itemsTree(this._root);
-           if (valuesTree === null) { return new ArrayList() }
-           return valuesTree
-         } else if (arguments.length === 1) {
-           var node = arguments[0];
-           var valuesTreeForNode = new ArrayList();
-           for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-             var childBoundable = i.next();
-             if (childBoundable instanceof AbstractNode) {
-               var valuesTreeForChild = this$1.itemsTree(childBoundable);
-               if (valuesTreeForChild !== null) { valuesTreeForNode.add(valuesTreeForChild); }
-             } else if (childBoundable instanceof ItemBoundable) {
-               valuesTreeForNode.add(childBoundable.getItem());
-             } else {
-               Assert.shouldNeverReachHere();
-             }
-           }
-           if (valuesTreeForNode.size() <= 0) { return null }
-           return valuesTreeForNode
-         }
-       };
-       AbstractSTRtree.prototype.insert = function insert (bounds, item) {
-         Assert.isTrue(!this._built, 'Cannot insert items into an STR packed R-tree after it has been built.');
-         this._itemBoundables.add(new ItemBoundable(bounds, item));
-       };
-       AbstractSTRtree.prototype.boundablesAtLevel = function boundablesAtLevel () {
-           var this$1 = this;
+               /* base-64 pad character. Default '=' for strict RFC compliance   */
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,

 
 

-         if (arguments.length === 1) {
-           var level = arguments[0];
-           var boundables = new ArrayList();
-           this.boundablesAtLevel(level, this._root, boundables);
-           return boundables
-         } else if (arguments.length === 3) {
-           var level$1 = arguments[0];
-           var top = arguments[1];
-           var boundables$1 = arguments[2];
-           Assert.isTrue(level$1 > -2);
-           if (top.getLevel() === level$1) {
-             boundables$1.add(top);
-             return null
-           }
-           for (var i = top.getChildBoundables().iterator(); i.hasNext();) {
-             var boundable = i.next();
-             if (boundable instanceof AbstractNode) {
-               this$1.boundablesAtLevel(level$1, boundable, boundables$1);
-             } else {
-               Assert.isTrue(boundable instanceof ItemBoundable);
-               if (level$1 === -1) {
-                 boundables$1.add(boundable);
-               }
-             }
-           }
-           return null
-         }
-       };
-       AbstractSTRtree.prototype.query = function query () {
-           var this$1 = this;
+               /* enable/disable utf8 encoding */
+               sha256_K;
+               /* privileged (public) methods */

 
 

-         if (arguments.length === 1) {
-           var searchBounds = arguments[0];
-           this.build();
-           var matches = new ArrayList();
-           if (this.isEmpty()) {
-             return matches
-           }
-           if (this.getIntersectsOp().intersects(this._root.getBounds(), searchBounds)) {
-             this.query(searchBounds, this._root, matches);
-           }
-           return matches
-         } else if (arguments.length === 2) {
-           var searchBounds$1 = arguments[0];
-           var visitor = arguments[1];
-           this.build();
-           if (this.isEmpty()) {
-             return null
-           }
-           if (this.getIntersectsOp().intersects(this._root.getBounds(), searchBounds$1)) {
-             this.query(searchBounds$1, this._root, visitor);
-           }
-         } else if (arguments.length === 3) {
-           if (hasInterface(arguments[2], ItemVisitor) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-             var searchBounds$2 = arguments[0];
-             var node = arguments[1];
-             var visitor$1 = arguments[2];
-             var childBoundables = node.getChildBoundables();
-             for (var i = 0; i < childBoundables.size(); i++) {
-               var childBoundable = childBoundables.get(i);
-               if (!this$1.getIntersectsOp().intersects(childBoundable.getBounds(), searchBounds$2)) {
-                 continue
-               }
-               if (childBoundable instanceof AbstractNode) {
-                 this$1.query(searchBounds$2, childBoundable, visitor$1);
-               } else if (childBoundable instanceof ItemBoundable) {
-                 visitor$1.visitItem(childBoundable.getItem());
-               } else {
-                 Assert.shouldNeverReachHere();
-               }
-             }
-           } else if (hasInterface(arguments[2], List) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-             var searchBounds$3 = arguments[0];
-             var node$1 = arguments[1];
-             var matches$1 = arguments[2];
-             var childBoundables$1 = node$1.getChildBoundables();
-             for (var i$1 = 0; i$1 < childBoundables$1.size(); i$1++) {
-               var childBoundable$1 = childBoundables$1.get(i$1);
-               if (!this$1.getIntersectsOp().intersects(childBoundable$1.getBounds(), searchBounds$3)) {
-                 continue
-               }
-               if (childBoundable$1 instanceof AbstractNode) {
-                 this$1.query(searchBounds$3, childBoundable$1, matches$1);
-               } else if (childBoundable$1 instanceof ItemBoundable) {
-                 matches$1.add(childBoundable$1.getItem());
-               } else {
-                 Assert.shouldNeverReachHere();
-               }
-             }
-           }
-         }
-       };
-       AbstractSTRtree.prototype.build = function build () {
-         if (this._built) { return null }
-         this._root = this._itemBoundables.isEmpty() ? this.createNode(0) : this.createHigherLevels(this._itemBoundables, -1);
-         this._itemBoundables = null;
-         this._built = true;
-       };
-       AbstractSTRtree.prototype.getRoot = function getRoot () {
-         this.build();
-         return this._root
-       };
-       AbstractSTRtree.prototype.remove = function remove () {
-           var this$1 = this;
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s, utf8));
+               };

 
 

-         if (arguments.length === 2) {
-           var searchBounds = arguments[0];
-           var item = arguments[1];
-           this.build();
-           if (this.getIntersectsOp().intersects(this._root.getBounds(), searchBounds)) {
-             return this.remove(searchBounds, this._root, item)
-           }
-           return false
-         } else if (arguments.length === 3) {
-           var searchBounds$1 = arguments[0];
-           var node = arguments[1];
-           var item$1 = arguments[2];
-           var found = this.removeItem(node, item$1);
-           if (found) { return true }
-           var childToPrune = null;
-           for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-             var childBoundable = i.next();
-             if (!this$1.getIntersectsOp().intersects(childBoundable.getBounds(), searchBounds$1)) {
-               continue
-             }
-             if (childBoundable instanceof AbstractNode) {
-               found = this$1.remove(searchBounds$1, childBoundable, item$1);
-               if (found) {
-                 childToPrune = childBoundable;
-                 break
-               }
-             }
-           }
-           if (childToPrune !== null) {
-             if (childToPrune.getChildBoundables().isEmpty()) {
-               node.getChildBoundables().remove(childToPrune);
-             }
-           }
-           return found
-         }
-       };
-       AbstractSTRtree.prototype.createHigherLevels = function createHigherLevels (boundablesOfALevel, level) {
-         Assert.isTrue(!boundablesOfALevel.isEmpty());
-         var parentBoundables = this.createParentBoundables(boundablesOfALevel, level + 1);
-         if (parentBoundables.size() === 1) {
-           return parentBoundables.get(0)
-         }
-         return this.createHigherLevels(parentBoundables, level + 1)
-       };
-       AbstractSTRtree.prototype.depth = function depth () {
-           var this$1 = this;
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s, utf8), b64pad);
+               };

 
 

-         if (arguments.length === 0) {
-           if (this.isEmpty()) {
-             return 0
-           }
-           this.build();
-           return this.depth(this._root)
-         } else if (arguments.length === 1) {
-           var node = arguments[0];
-           var maxChildDepth = 0;
-           for (var i = node.getChildBoundables().iterator(); i.hasNext();) {
-             var childBoundable = i.next();
-             if (childBoundable instanceof AbstractNode) {
-               var childDepth = this$1.depth(childBoundable);
-               if (childDepth > maxChildDepth) { maxChildDepth = childDepth; }
-             }
-           }
-           return maxChildDepth + 1
-         }
-       };
-       AbstractSTRtree.prototype.createParentBoundables = function createParentBoundables (childBoundables, newLevel) {
-           var this$1 = this;
-
-         Assert.isTrue(!childBoundables.isEmpty());
-         var parentBoundables = new ArrayList();
-         parentBoundables.add(this.createNode(newLevel));
-         var sortedChildBoundables = new ArrayList(childBoundables);
-         Collections.sort(sortedChildBoundables, this.getComparator());
-         for (var i = sortedChildBoundables.iterator(); i.hasNext();) {
-           var childBoundable = i.next();
-           if (this$1.lastNode(parentBoundables).getChildBoundables().size() === this$1.getNodeCapacity()) {
-             parentBoundables.add(this$1.createNode(newLevel));
-           }
-           this$1.lastNode(parentBoundables).addChildBoundable(childBoundable);
-         }
-         return parentBoundables
-       };
-       AbstractSTRtree.prototype.isEmpty = function isEmpty () {
-         if (!this._built) { return this._itemBoundables.isEmpty() }
-         return this._root.isEmpty()
-       };
-       AbstractSTRtree.prototype.interfaces_ = function interfaces_ () {
-         return [Serializable]
-       };
-       AbstractSTRtree.prototype.getClass = function getClass () {
-         return AbstractSTRtree
-       };
-       AbstractSTRtree.compareDoubles = function compareDoubles (a, b) {
-         return a > b ? 1 : a < b ? -1 : 0
-       };
-       staticAccessors$23.IntersectsOp.get = function () { return IntersectsOp };
-       staticAccessors$23.serialVersionUID.get = function () { return -3886435814360241337 };
-       staticAccessors$23.DEFAULT_NODE_CAPACITY.get = function () { return 10 };
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s, utf8), e);
+               };

 
 

-       Object.defineProperties( AbstractSTRtree, staticAccessors$23 );
+               this.raw = function (s) {
+                 return rstr(s, utf8);
+               };

 
 

-       var IntersectsOp = function IntersectsOp () {};
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };

 
 

-       var ItemDistance = function ItemDistance () {};
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };

 
 

-       ItemDistance.prototype.distance = function distance (item1, item2) {};
-       ItemDistance.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       ItemDistance.prototype.getClass = function getClass () {
-         return ItemDistance
-       };
+               this.any_hmac = function (k, d, e) {
+                 return rstr2any(rstr_hmac(k, d), e);
+               };
+               /**
+                * Perform a simple self-test to see if the VM is working
+                * @return {String} Hexadecimal hash sample
+                * @public
+                */

 
 

-       var STRtree = (function (AbstractSTRtree$$1) {
-         function STRtree (nodeCapacity) {
-           nodeCapacity = nodeCapacity || STRtree.DEFAULT_NODE_CAPACITY;
-           AbstractSTRtree$$1.call(this, nodeCapacity);
-         }
-
-         if ( AbstractSTRtree$$1 ) { STRtree.__proto__ = AbstractSTRtree$$1; }
-         STRtree.prototype = Object.create( AbstractSTRtree$$1 && AbstractSTRtree$$1.prototype );
-         STRtree.prototype.constructor = STRtree;
-
-         var staticAccessors = { STRtreeNode: { configurable: true },serialVersionUID: { configurable: true },xComparator: { configurable: true },yComparator: { configurable: true },intersectsOp: { configurable: true },DEFAULT_NODE_CAPACITY: { configurable: true } };
-         STRtree.prototype.createParentBoundablesFromVerticalSlices = function createParentBoundablesFromVerticalSlices (verticalSlices, newLevel) {
-           var this$1 = this;
-
-           Assert.isTrue(verticalSlices.length > 0);
-           var parentBoundables = new ArrayList();
-           for (var i = 0; i < verticalSlices.length; i++) {
-             parentBoundables.addAll(this$1.createParentBoundablesFromVerticalSlice(verticalSlices[i], newLevel));
-           }
-           return parentBoundables
-         };
-         STRtree.prototype.createNode = function createNode (level) {
-           return new STRtreeNode(level)
-         };
-         STRtree.prototype.size = function size () {
-           if (arguments.length === 0) {
-             return AbstractSTRtree$$1.prototype.size.call(this)
-           } else { return AbstractSTRtree$$1.prototype.size.apply(this, arguments) }
-         };
-         STRtree.prototype.insert = function insert () {
-           if (arguments.length === 2) {
-             var itemEnv = arguments[0];
-             var item = arguments[1];
-             if (itemEnv.isNull()) {
-               return null
-             }
-             AbstractSTRtree$$1.prototype.insert.call(this, itemEnv, item);
-           } else { return AbstractSTRtree$$1.prototype.insert.apply(this, arguments) }
-         };
-         STRtree.prototype.getIntersectsOp = function getIntersectsOp () {
-           return STRtree.intersectsOp
-         };
-         STRtree.prototype.verticalSlices = function verticalSlices (childBoundables, sliceCount) {
-           var sliceCapacity = Math.trunc(Math.ceil(childBoundables.size() / sliceCount));
-           var slices = new Array(sliceCount).fill(null);
-           var i = childBoundables.iterator();
-           for (var j = 0; j < sliceCount; j++) {
-             slices[j] = new ArrayList();
-             var boundablesAddedToSlice = 0;
-             while (i.hasNext() && boundablesAddedToSlice < sliceCapacity) {
-               var childBoundable = i.next();
-               slices[j].add(childBoundable);
-               boundablesAddedToSlice++;
-             }
-           }
-           return slices
-         };
-         STRtree.prototype.query = function query () {
-           if (arguments.length === 1) {
-             var searchEnv = arguments[0];
-             return AbstractSTRtree$$1.prototype.query.call(this, searchEnv)
-           } else if (arguments.length === 2) {
-             var searchEnv$1 = arguments[0];
-             var visitor = arguments[1];
-             AbstractSTRtree$$1.prototype.query.call(this, searchEnv$1, visitor);
-           } else if (arguments.length === 3) {
-             if (hasInterface(arguments[2], ItemVisitor) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-               var searchBounds = arguments[0];
-               var node = arguments[1];
-               var visitor$1 = arguments[2];
-               AbstractSTRtree$$1.prototype.query.call(this, searchBounds, node, visitor$1);
-             } else if (hasInterface(arguments[2], List) && (arguments[0] instanceof Object && arguments[1] instanceof AbstractNode)) {
-               var searchBounds$1 = arguments[0];
-               var node$1 = arguments[1];
-               var matches = arguments[2];
-               AbstractSTRtree$$1.prototype.query.call(this, searchBounds$1, node$1, matches);
-             }
-           }
-         };
-         STRtree.prototype.getComparator = function getComparator () {
-           return STRtree.yComparator
-         };
-         STRtree.prototype.createParentBoundablesFromVerticalSlice = function createParentBoundablesFromVerticalSlice (childBoundables, newLevel) {
-           return AbstractSTRtree$$1.prototype.createParentBoundables.call(this, childBoundables, newLevel)
-         };
-         STRtree.prototype.remove = function remove () {
-           if (arguments.length === 2) {
-             var itemEnv = arguments[0];
-             var item = arguments[1];
-             return AbstractSTRtree$$1.prototype.remove.call(this, itemEnv, item)
-           } else { return AbstractSTRtree$$1.prototype.remove.apply(this, arguments) }
-         };
-         STRtree.prototype.depth = function depth () {
-           if (arguments.length === 0) {
-             return AbstractSTRtree$$1.prototype.depth.call(this)
-           } else { return AbstractSTRtree$$1.prototype.depth.apply(this, arguments) }
-         };
-         STRtree.prototype.createParentBoundables = function createParentBoundables (childBoundables, newLevel) {
-           Assert.isTrue(!childBoundables.isEmpty());
-           var minLeafCount = Math.trunc(Math.ceil(childBoundables.size() / this.getNodeCapacity()));
-           var sortedChildBoundables = new ArrayList(childBoundables);
-           Collections.sort(sortedChildBoundables, STRtree.xComparator);
-           var verticalSlices = this.verticalSlices(sortedChildBoundables, Math.trunc(Math.ceil(Math.sqrt(minLeafCount))));
-           return this.createParentBoundablesFromVerticalSlices(verticalSlices, newLevel)
-         };
-         STRtree.prototype.nearestNeighbour = function nearestNeighbour () {
-           if (arguments.length === 1) {
-             if (hasInterface(arguments[0], ItemDistance)) {
-               var itemDist = arguments[0];
-               var bp = new BoundablePair(this.getRoot(), this.getRoot(), itemDist);
-               return this.nearestNeighbour(bp)
-             } else if (arguments[0] instanceof BoundablePair) {
-               var initBndPair = arguments[0];
-               return this.nearestNeighbour(initBndPair, Double.POSITIVE_INFINITY)
-             }
-           } else if (arguments.length === 2) {
-             if (arguments[0] instanceof STRtree && hasInterface(arguments[1], ItemDistance)) {
-               var tree = arguments[0];
-               var itemDist$1 = arguments[1];
-               var bp$1 = new BoundablePair(this.getRoot(), tree.getRoot(), itemDist$1);
-               return this.nearestNeighbour(bp$1)
-             } else if (arguments[0] instanceof BoundablePair && typeof arguments[1] === 'number') {
-               var initBndPair$1 = arguments[0];
-               var maxDistance = arguments[1];
-               var distanceLowerBound = maxDistance;
-               var minPair = null;
-               var priQ = new PriorityQueue();
-               priQ.add(initBndPair$1);
-               while (!priQ.isEmpty() && distanceLowerBound > 0.0) {
-                 var bndPair = priQ.poll();
-                 var currentDistance = bndPair.getDistance();
-                 if (currentDistance >= distanceLowerBound) { break }
-                 if (bndPair.isLeaves()) {
-                   distanceLowerBound = currentDistance;
-                   minPair = bndPair;
-                 } else {
-                   bndPair.expandToQueue(priQ, distanceLowerBound);
-                 }
-               }
-               return [minPair.getBoundable(0).getItem(), minPair.getBoundable(1).getItem()]
-             }
-           } else if (arguments.length === 3) {
-             var env = arguments[0];
-             var item = arguments[1];
-             var itemDist$2 = arguments[2];
-             var bnd = new ItemBoundable(env, item);
-             var bp$2 = new BoundablePair(this.getRoot(), bnd, itemDist$2);
-             return this.nearestNeighbour(bp$2)[0]
-           }
-         };
-         STRtree.prototype.interfaces_ = function interfaces_ () {
-           return [SpatialIndex, Serializable]
-         };
-         STRtree.prototype.getClass = function getClass () {
-           return STRtree
-         };
-         STRtree.centreX = function centreX (e) {
-           return STRtree.avg(e.getMinX(), e.getMaxX())
-         };
-         STRtree.avg = function avg (a, b) {
-           return (a + b) / 2
-         };
-         STRtree.centreY = function centreY (e) {
-           return STRtree.avg(e.getMinY(), e.getMaxY())
-         };
-         staticAccessors.STRtreeNode.get = function () { return STRtreeNode };
-         staticAccessors.serialVersionUID.get = function () { return 259274702368956900 };
-         staticAccessors.xComparator.get = function () {
-           return {
-             interfaces_: function () {
-               return [Comparator]
-             },
-             compare: function (o1, o2) {
-               return AbstractSTRtree$$1.compareDoubles(STRtree.centreX(o1.getBounds()), STRtree.centreX(o2.getBounds()))
-             }
-           }
-         };
-         staticAccessors.yComparator.get = function () {
-           return {
-             interfaces_: function () {
-               return [Comparator]
-             },
-             compare: function (o1, o2) {
-               return AbstractSTRtree$$1.compareDoubles(STRtree.centreY(o1.getBounds()), STRtree.centreY(o2.getBounds()))
-             }
-           }
-         };
-         staticAccessors.intersectsOp.get = function () {
-           return {
-             interfaces_: function () {
-               return [AbstractSTRtree$$1.IntersectsOp]
-             },
-             intersects: function (aBounds, bBounds) {
-               return aBounds.intersects(bBounds)
-             }
-           }
-         };
-         staticAccessors.DEFAULT_NODE_CAPACITY.get = function () { return 10 };

 
 

-         Object.defineProperties( STRtree, staticAccessors );
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */

 
 

-         return STRtree;
-       }(AbstractSTRtree));

 
 

-       var STRtreeNode = (function (AbstractNode$$1) {
-         function STRtreeNode () {
-           var level = arguments[0];
-           AbstractNode$$1.call(this, level);
-         }
+               this.setUpperCase = function (a) {

 
 

-         if ( AbstractNode$$1 ) { STRtreeNode.__proto__ = AbstractNode$$1; }
-         STRtreeNode.prototype = Object.create( AbstractNode$$1 && AbstractNode$$1.prototype );
-         STRtreeNode.prototype.constructor = STRtreeNode;
-         STRtreeNode.prototype.computeBounds = function computeBounds () {
-           var bounds = null;
-           for (var i = this.getChildBoundables().iterator(); i.hasNext();) {
-             var childBoundable = i.next();
-             if (bounds === null) {
-               bounds = new Envelope(childBoundable.getBounds());
-             } else {
-               bounds.expandToInclude(childBoundable.getBounds());
-             }
-           }
-           return bounds
-         };
-         STRtreeNode.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         STRtreeNode.prototype.getClass = function getClass () {
-           return STRtreeNode
-         };
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */

 
 

-         return STRtreeNode;
-       }(AbstractNode));

 
 

-       var SegmentPointComparator = function SegmentPointComparator () {};
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */

 
 

-       SegmentPointComparator.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       SegmentPointComparator.prototype.getClass = function getClass () {
-         return SegmentPointComparator
-       };
-       SegmentPointComparator.relativeSign = function relativeSign (x0, x1) {
-         if (x0 < x1) { return -1 }
-         if (x0 > x1) { return 1 }
-         return 0
-       };
-       SegmentPointComparator.compare = function compare (octant, p0, p1) {
-         if (p0.equals2D(p1)) { return 0 }
-         var xSign = SegmentPointComparator.relativeSign(p0.x, p1.x);
-         var ySign = SegmentPointComparator.relativeSign(p0.y, p1.y);
-         switch (octant) {
-           case 0:
-             return SegmentPointComparator.compareValue(xSign, ySign)
-           case 1:
-             return SegmentPointComparator.compareValue(ySign, xSign)
-           case 2:
-             return SegmentPointComparator.compareValue(ySign, -xSign)
-           case 3:
-             return SegmentPointComparator.compareValue(-xSign, ySign)
-           case 4:
-             return SegmentPointComparator.compareValue(-xSign, -ySign)
-           case 5:
-             return SegmentPointComparator.compareValue(-ySign, -xSign)
-           case 6:
-             return SegmentPointComparator.compareValue(-ySign, xSign)
-           case 7:
-             return SegmentPointComparator.compareValue(xSign, -ySign)
-         }
-         Assert.shouldNeverReachHere('invalid octant value');
-         return 0
-       };
-       SegmentPointComparator.compareValue = function compareValue (compareSign0, compareSign1) {
-         if (compareSign0 < 0) { return -1 }
-         if (compareSign0 > 0) { return 1 }
-         if (compareSign1 < 0) { return -1 }
-         if (compareSign1 > 0) { return 1 }
-         return 0
-       };

 
 

-       var SegmentNode = function SegmentNode () {
-         this._segString = null;
-         this.coord = null;
-         this.segmentIndex = null;
-         this._segmentOctant = null;
-         this._isInterior = null;
-         var segString = arguments[0];
-         var coord = arguments[1];
-         var segmentIndex = arguments[2];
-         var segmentOctant = arguments[3];
-         this._segString = segString;
-         this.coord = new Coordinate(coord);
-         this.segmentIndex = segmentIndex;
-         this._segmentOctant = segmentOctant;
-         this._isInterior = !coord.equals2D(segString.getCoordinate(segmentIndex));
-       };
-       SegmentNode.prototype.getCoordinate = function getCoordinate () {
-         return this.coord
-       };
-       SegmentNode.prototype.print = function print (out) {
-         out.print(this.coord);
-         out.print(' seg # = ' + this.segmentIndex);
-       };
-       SegmentNode.prototype.compareTo = function compareTo (obj) {
-         var other = obj;
-         if (this.segmentIndex < other.segmentIndex) { return -1 }
-         if (this.segmentIndex > other.segmentIndex) { return 1 }
-         if (this.coord.equals2D(other.coord)) { return 0 }
-         return SegmentPointComparator.compare(this._segmentOctant, this.coord, other.coord)
-       };
-       SegmentNode.prototype.isEndPoint = function isEndPoint (maxSegmentIndex) {
-         if (this.segmentIndex === 0 && !this._isInterior) { return true }
-         if (this.segmentIndex === maxSegmentIndex) { return true }
-         return false
-       };
-       SegmentNode.prototype.isInterior = function isInterior () {
-         return this._isInterior
-       };
-       SegmentNode.prototype.interfaces_ = function interfaces_ () {
-         return [Comparable]
-       };
-       SegmentNode.prototype.getClass = function getClass () {
-         return SegmentNode
-       };
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }

 
 

-       // import Iterator from '../../../../java/util/Iterator'
-       var SegmentNodeList = function SegmentNodeList () {
-         this._nodeMap = new TreeMap();
-         this._edge = null;
-         var edge = arguments[0];
-         this._edge = edge;
-       };
-       SegmentNodeList.prototype.getSplitCoordinates = function getSplitCoordinates () {
-           var this$1 = this;
-
-         var coordList = new CoordinateList();
-         this.addEndpoints();
-         var it = this.iterator();
-         var eiPrev = it.next();
-         while (it.hasNext()) {
-           var ei = it.next();
-           this$1.addEdgeCoordinates(eiPrev, ei, coordList);
-           eiPrev = ei;
-         }
-         return coordList.toCoordinateArray()
-       };
-       SegmentNodeList.prototype.addCollapsedNodes = function addCollapsedNodes () {
-           var this$1 = this;
+                 return this;
+               }; // private methods

 
 

-         var collapsedVertexIndexes = new ArrayList();
-         this.findCollapsesFromInsertedNodes(collapsedVertexIndexes);
-         this.findCollapsesFromExistingVertices(collapsedVertexIndexes);
-         for (var it = collapsedVertexIndexes.iterator(); it.hasNext();) {
-           var vertexIndex = it.next().intValue();
-           this$1.add(this$1._edge.getCoordinate(vertexIndex), vertexIndex);
-         }
-       };
-       SegmentNodeList.prototype.print = function print (out) {
-         out.println('Intersections:');
-         for (var it = this.iterator(); it.hasNext();) {
-           var ei = it.next();
-           ei.print(out);
-         }
-       };
-       SegmentNodeList.prototype.findCollapsesFromExistingVertices = function findCollapsesFromExistingVertices (collapsedVertexIndexes) {
-           var this$1 = this;
+               /**
+                * Calculate the SHA-512 of a raw string
+                */

 
 

-         for (var i = 0; i < this._edge.size() - 2; i++) {
-           var p0 = this$1._edge.getCoordinate(i);
-           // const p1 = this._edge.getCoordinate(i + 1)
-           var p2 = this$1._edge.getCoordinate(i + 2);
-           if (p0.equals2D(p2)) {
-             collapsedVertexIndexes.add(new Integer(i + 1));
-           }
-         }
-       };
-       SegmentNodeList.prototype.addEdgeCoordinates = function addEdgeCoordinates (ei0, ei1, coordList) {
-           var this$1 = this;
-
-         // let npts = ei1.segmentIndex - ei0.segmentIndex + 2
-         var lastSegStartPt = this._edge.getCoordinate(ei1.segmentIndex);
-         var useIntPt1 = ei1.isInterior() || !ei1.coord.equals2D(lastSegStartPt);
-         // if (!useIntPt1) {
-         // npts--
-         // }
-         // const ipt = 0
-         coordList.add(new Coordinate(ei0.coord), false);
-         for (var i = ei0.segmentIndex + 1; i <= ei1.segmentIndex; i++) {
-           coordList.add(this$1._edge.getCoordinate(i));
-         }
-         if (useIntPt1) {
-           coordList.add(new Coordinate(ei1.coord));
-         }
-       };
-       SegmentNodeList.prototype.iterator = function iterator () {
-         return this._nodeMap.values().iterator()
-       };
-       SegmentNodeList.prototype.addSplitEdges = function addSplitEdges (edgeList) {
-           var this$1 = this;
-
-         this.addEndpoints();
-         this.addCollapsedNodes();
-         var it = this.iterator();
-         var eiPrev = it.next();
-         while (it.hasNext()) {
-           var ei = it.next();
-           var newEdge = this$1.createSplitEdge(eiPrev, ei);
-           edgeList.add(newEdge);
-           eiPrev = ei;
-         }
-       };
-       SegmentNodeList.prototype.findCollapseIndex = function findCollapseIndex (ei0, ei1, collapsedVertexIndex) {
-         if (!ei0.coord.equals2D(ei1.coord)) { return false }
-         var numVerticesBetween = ei1.segmentIndex - ei0.segmentIndex;
-         if (!ei1.isInterior()) {
-           numVerticesBetween--;
-         }
-         if (numVerticesBetween === 1) {
-           collapsedVertexIndex[0] = ei0.segmentIndex + 1;
-           return true
-         }
-         return false
-       };
-       SegmentNodeList.prototype.findCollapsesFromInsertedNodes = function findCollapsesFromInsertedNodes (collapsedVertexIndexes) {
-           var this$1 = this;
-
-         var collapsedVertexIndex = new Array(1).fill(null);
-         var it = this.iterator();
-         var eiPrev = it.next();
-         while (it.hasNext()) {
-           var ei = it.next();
-           var isCollapsed = this$1.findCollapseIndex(eiPrev, ei, collapsedVertexIndex);
-           if (isCollapsed) { collapsedVertexIndexes.add(new Integer(collapsedVertexIndex[0])); }
-           eiPrev = ei;
-         }
-       };
-       SegmentNodeList.prototype.getEdge = function getEdge () {
-         return this._edge
-       };
-       SegmentNodeList.prototype.addEndpoints = function addEndpoints () {
-         var maxSegIndex = this._edge.size() - 1;
-         this.add(this._edge.getCoordinate(0), 0);
-         this.add(this._edge.getCoordinate(maxSegIndex), maxSegIndex);
-       };
-       SegmentNodeList.prototype.createSplitEdge = function createSplitEdge (ei0, ei1) {
-           var this$1 = this;
-
-         var npts = ei1.segmentIndex - ei0.segmentIndex + 2;
-         var lastSegStartPt = this._edge.getCoordinate(ei1.segmentIndex);
-         var useIntPt1 = ei1.isInterior() || !ei1.coord.equals2D(lastSegStartPt);
-         if (!useIntPt1) {
-           npts--;
-         }
-         var pts = new Array(npts).fill(null);
-         var ipt = 0;
-         pts[ipt++] = new Coordinate(ei0.coord);
-         for (var i = ei0.segmentIndex + 1; i <= ei1.segmentIndex; i++) {
-           pts[ipt++] = this$1._edge.getCoordinate(i);
-         }
-         if (useIntPt1) { pts[ipt] = new Coordinate(ei1.coord); }
-         return new NodedSegmentString(pts, this._edge.getData())
-       };
-       SegmentNodeList.prototype.add = function add (intPt, segmentIndex) {
-         var eiNew = new SegmentNode(this._edge, intPt, segmentIndex, this._edge.getSegmentOctant(segmentIndex));
-         var ei = this._nodeMap.get(eiNew);
-         if (ei !== null) {
-           Assert.isTrue(ei.coord.equals2D(intPt), 'Found equal nodes with different coordinates');
-           return ei
-         }
-         this._nodeMap.put(eiNew, eiNew);
-         return eiNew
-       };
-       SegmentNodeList.prototype.checkSplitEdgesCorrectness = function checkSplitEdgesCorrectness (splitEdges) {
-         var edgePts = this._edge.getCoordinates();
-         var split0 = splitEdges.get(0);
-         var pt0 = split0.getCoordinate(0);
-         if (!pt0.equals2D(edgePts[0])) { throw new RuntimeException('bad split edge start point at ' + pt0) }
-         var splitn = splitEdges.get(splitEdges.size() - 1);
-         var splitnPts = splitn.getCoordinates();
-         var ptn = splitnPts[splitnPts.length - 1];
-         if (!ptn.equals2D(edgePts[edgePts.length - 1])) { throw new RuntimeException('bad split edge end point at ' + ptn) }
-       };
-       SegmentNodeList.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       SegmentNodeList.prototype.getClass = function getClass () {
-         return SegmentNodeList
-       };

 
 

+               function rstr(s, utf8) {
+                 s = utf8 ? utf8Encode(s) : s;
+                 return binb2rstr(binb(rstr2binb(s), s.length * 8));
+               }
+               /**
+                * Calculate the HMAC-sha256 of a key and some data (raw strings)
+                */

 
 
 
 

-       // class NodeVertexIterator {
-       //   constructor () {
-       //     this._nodeList = null
-       //     this._edge = null
-       //     this._nodeIt = null
-       //     this._currNode = null
-       //     this._nextNode = null
-       //     this._currSegIndex = 0
-       //     let nodeList = arguments[0]
-       //     this._nodeList = nodeList
-       //     this._edge = nodeList.getEdge()
-       //     this._nodeIt = nodeList.iterator()
-       //     this.readNextNode()
-       //   }
-       //   next () {
-       //     if (this._currNode === null) {
-       //       this._currNode = this._nextNode
-       //       this._currSegIndex = this._currNode.segmentIndex
-       //       this.readNextNode()
-       //       return this._currNode
-       //     }
-       //     if (this._nextNode === null) return null
-       //     if (this._nextNode.segmentIndex === this._currNode.segmentIndex) {
-       //       this._currNode = this._nextNode
-       //       this._currSegIndex = this._currNode.segmentIndex
-       //       this.readNextNode()
-       //       return this._currNode
-       //     }
-       //     if (this._nextNode.segmentIndex > this._currNode.segmentIndex) {}
-       //     return null
-       //   }
-       //   remove () {
-       //     // throw new UnsupportedOperationException(this.getClass().getName())
-       //   }
-       //   hasNext () {
-       //     if (this._nextNode === null) return false
-       //     return true
-       //   }
-       //   readNextNode () {
-       //     if (this._nodeIt.hasNext()) this._nextNode = this._nodeIt.next(); else this._nextNode = null
-       //   }
-       //   interfaces_ () {
-       //     return [Iterator]
-       //   }
-       //   getClass () {
-       //     return NodeVertexIterator
-       //   }
-       // }
+               function rstr_hmac(key, data) {
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 var hash,
+                     i = 0,
+                     bkey = rstr2binb(key),
+                     ipad = Array(16),
+                     opad = Array(16);

 
 

-       var Octant = function Octant () {};
+                 if (bkey.length > 16) {
+                   bkey = binb(bkey, key.length * 8);
+                 }

 
 

-       Octant.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Octant.prototype.getClass = function getClass () {
-         return Octant
-       };
-       Octant.octant = function octant () {
-         if (typeof arguments[0] === 'number' && typeof arguments[1] === 'number') {
-           var dx = arguments[0];
-           var dy = arguments[1];
-           if (dx === 0.0 && dy === 0.0) { throw new IllegalArgumentException('Cannot compute the octant for point ( ' + dx + ', ' + dy + ' )') }
-           var adx = Math.abs(dx);
-           var ady = Math.abs(dy);
-           if (dx >= 0) {
-             if (dy >= 0) {
-               if (adx >= ady) { return 0; } else { return 1 }
-             } else {
-               if (adx >= ady) { return 7; } else { return 6 }
-             }
-           } else {
-             if (dy >= 0) {
-               if (adx >= ady) { return 3; } else { return 2 }
-             } else {
-               if (adx >= ady) { return 4; } else { return 5 }
-             }
-           }
-         } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Coordinate) {
-           var p0 = arguments[0];
-           var p1 = arguments[1];
-           var dx$1 = p1.x - p0.x;
-           var dy$1 = p1.y - p0.y;
-           if (dx$1 === 0.0 && dy$1 === 0.0) { throw new IllegalArgumentException('Cannot compute the octant for two identical points ' + p0) }
-           return Octant.octant(dx$1, dy$1)
-         }
-       };
+                 for (; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }

 
 

-       var SegmentString = function SegmentString () {};
+                 hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
+                 return binb2rstr(binb(opad.concat(hash), 512 + 256));
+               }
+               /*
+                * Main sha256 function, with its support functions
+                */

 
 

-       SegmentString.prototype.getCoordinates = function getCoordinates () {};
-       SegmentString.prototype.size = function size () {};
-       SegmentString.prototype.getCoordinate = function getCoordinate (i) {};
-       SegmentString.prototype.isClosed = function isClosed () {};
-       SegmentString.prototype.setData = function setData (data) {};
-       SegmentString.prototype.getData = function getData () {};
-       SegmentString.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       SegmentString.prototype.getClass = function getClass () {
-         return SegmentString
-       };

 
 

-       var NodableSegmentString = function NodableSegmentString () {};
+               function sha256_S(X, n) {
+                 return X >>> n | X << 32 - n;
+               }

 
 

-       NodableSegmentString.prototype.addIntersection = function addIntersection (intPt, segmentIndex) {};
-       NodableSegmentString.prototype.interfaces_ = function interfaces_ () {
-         return [SegmentString]
-       };
-       NodableSegmentString.prototype.getClass = function getClass () {
-         return NodableSegmentString
-       };
+               function sha256_R(X, n) {
+                 return X >>> n;
+               }

 
 

-       var NodedSegmentString = function NodedSegmentString () {
-         this._nodeList = new SegmentNodeList(this);
-         this._pts = null;
-         this._data = null;
-         var pts = arguments[0];
-         var data = arguments[1];
-         this._pts = pts;
-         this._data = data;
-       };
-       NodedSegmentString.prototype.getCoordinates = function getCoordinates () {
-         return this._pts
-       };
-       NodedSegmentString.prototype.size = function size () {
-         return this._pts.length
-       };
-       NodedSegmentString.prototype.getCoordinate = function getCoordinate (i) {
-         return this._pts[i]
-       };
-       NodedSegmentString.prototype.isClosed = function isClosed () {
-         return this._pts[0].equals(this._pts[this._pts.length - 1])
-       };
-       NodedSegmentString.prototype.getSegmentOctant = function getSegmentOctant (index) {
-         if (index === this._pts.length - 1) { return -1 }
-         return this.safeOctant(this.getCoordinate(index), this.getCoordinate(index + 1))
-       };
-       NodedSegmentString.prototype.setData = function setData (data) {
-         this._data = data;
-       };
-       NodedSegmentString.prototype.safeOctant = function safeOctant (p0, p1) {
-         if (p0.equals2D(p1)) { return 0 }
-         return Octant.octant(p0, p1)
-       };
-       NodedSegmentString.prototype.getData = function getData () {
-         return this._data
-       };
-       NodedSegmentString.prototype.addIntersection = function addIntersection () {
-         if (arguments.length === 2) {
-           var intPt$1 = arguments[0];
-           var segmentIndex = arguments[1];
-           this.addIntersectionNode(intPt$1, segmentIndex);
-         } else if (arguments.length === 4) {
-           var li = arguments[0];
-           var segmentIndex$1 = arguments[1];
-           // const geomIndex = arguments[2]
-           var intIndex = arguments[3];
-           var intPt = new Coordinate(li.getIntersection(intIndex));
-           this.addIntersection(intPt, segmentIndex$1);
-         }
-       };
-       NodedSegmentString.prototype.toString = function toString () {
-         return WKTWriter.toLineString(new CoordinateArraySequence(this._pts))
-       };
-       NodedSegmentString.prototype.getNodeList = function getNodeList () {
-         return this._nodeList
-       };
-       NodedSegmentString.prototype.addIntersectionNode = function addIntersectionNode (intPt, segmentIndex) {
-         var normalizedSegmentIndex = segmentIndex;
-         var nextSegIndex = normalizedSegmentIndex + 1;
-         if (nextSegIndex < this._pts.length) {
-           var nextPt = this._pts[nextSegIndex];
-           if (intPt.equals2D(nextPt)) {
-             normalizedSegmentIndex = nextSegIndex;
-           }
-         }
-         var ei = this._nodeList.add(intPt, normalizedSegmentIndex);
-         return ei
-       };
-       NodedSegmentString.prototype.addIntersections = function addIntersections (li, segmentIndex, geomIndex) {
-           var this$1 = this;
+               function sha256_Ch(x, y, z) {
+                 return x & y ^ ~x & z;
+               }

 
 

-         for (var i = 0; i < li.getIntersectionNum(); i++) {
-           this$1.addIntersection(li, segmentIndex, geomIndex, i);
-         }
-       };
-       NodedSegmentString.prototype.interfaces_ = function interfaces_ () {
-         return [NodableSegmentString]
-       };
-       NodedSegmentString.prototype.getClass = function getClass () {
-         return NodedSegmentString
-       };
-       NodedSegmentString.getNodedSubstrings = function getNodedSubstrings () {
-         if (arguments.length === 1) {
-           var segStrings = arguments[0];
-           var resultEdgelist = new ArrayList();
-           NodedSegmentString.getNodedSubstrings(segStrings, resultEdgelist);
-           return resultEdgelist
-         } else if (arguments.length === 2) {
-           var segStrings$1 = arguments[0];
-           var resultEdgelist$1 = arguments[1];
-           for (var i = segStrings$1.iterator(); i.hasNext();) {
-             var ss = i.next();
-             ss.getNodeList().addSplitEdges(resultEdgelist$1);
-           }
-         }
-       };
+               function sha256_Maj(x, y, z) {
+                 return x & y ^ x & z ^ y & z;
+               }

 
 

-       var LineSegment = function LineSegment () {
-         this.p0 = null;
-         this.p1 = null;
-         if (arguments.length === 0) {
-           this.p0 = new Coordinate();
-           this.p1 = new Coordinate();
-         } else if (arguments.length === 1) {
-           var ls = arguments[0];
-           this.p0 = new Coordinate(ls.p0);
-           this.p1 = new Coordinate(ls.p1);
-         } else if (arguments.length === 2) {
-           this.p0 = arguments[0];
-           this.p1 = arguments[1];
-         } else if (arguments.length === 4) {
-           var x0 = arguments[0];
-           var y0 = arguments[1];
-           var x1 = arguments[2];
-           var y1 = arguments[3];
-           this.p0 = new Coordinate(x0, y0);
-           this.p1 = new Coordinate(x1, y1);
-         }
-       };
+               function sha256_Sigma0256(x) {
+                 return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
+               }

 
 

-       var staticAccessors$24 = { serialVersionUID: { configurable: true } };
-       LineSegment.prototype.minX = function minX () {
-         return Math.min(this.p0.x, this.p1.x)
-       };
-       LineSegment.prototype.orientationIndex = function orientationIndex () {
-         if (arguments[0] instanceof LineSegment) {
-           var seg = arguments[0];
-           var orient0 = CGAlgorithms.orientationIndex(this.p0, this.p1, seg.p0);
-           var orient1 = CGAlgorithms.orientationIndex(this.p0, this.p1, seg.p1);
-           if (orient0 >= 0 && orient1 >= 0) { return Math.max(orient0, orient1) }
-           if (orient0 <= 0 && orient1 <= 0) { return Math.max(orient0, orient1) }
-           return 0
-         } else if (arguments[0] instanceof Coordinate) {
-           var p = arguments[0];
-           return CGAlgorithms.orientationIndex(this.p0, this.p1, p)
-         }
-       };
-       LineSegment.prototype.toGeometry = function toGeometry (geomFactory) {
-         return geomFactory.createLineString([this.p0, this.p1])
-       };
-       LineSegment.prototype.isVertical = function isVertical () {
-         return this.p0.x === this.p1.x
-       };
-       LineSegment.prototype.equals = function equals (o) {
-         if (!(o instanceof LineSegment)) {
-           return false
-         }
-         var other = o;
-         return this.p0.equals(other.p0) && this.p1.equals(other.p1)
-       };
-       LineSegment.prototype.intersection = function intersection (line) {
-         var li = new RobustLineIntersector();
-         li.computeIntersection(this.p0, this.p1, line.p0, line.p1);
-         if (li.hasIntersection()) { return li.getIntersection(0) }
-         return null
-       };
-       LineSegment.prototype.project = function project () {
-         if (arguments[0] instanceof Coordinate) {
-           var p = arguments[0];
-           if (p.equals(this.p0) || p.equals(this.p1)) { return new Coordinate(p) }
-           var r = this.projectionFactor(p);
-           var coord = new Coordinate();
-           coord.x = this.p0.x + r * (this.p1.x - this.p0.x);
-           coord.y = this.p0.y + r * (this.p1.y - this.p0.y);
-           return coord
-         } else if (arguments[0] instanceof LineSegment) {
-           var seg = arguments[0];
-           var pf0 = this.projectionFactor(seg.p0);
-           var pf1 = this.projectionFactor(seg.p1);
-           if (pf0 >= 1.0 && pf1 >= 1.0) { return null }
-           if (pf0 <= 0.0 && pf1 <= 0.0) { return null }
-           var newp0 = this.project(seg.p0);
-           if (pf0 < 0.0) { newp0 = this.p0; }
-           if (pf0 > 1.0) { newp0 = this.p1; }
-           var newp1 = this.project(seg.p1);
-           if (pf1 < 0.0) { newp1 = this.p0; }
-           if (pf1 > 1.0) { newp1 = this.p1; }
-           return new LineSegment(newp0, newp1)
-         }
-       };
-       LineSegment.prototype.normalize = function normalize () {
-         if (this.p1.compareTo(this.p0) < 0) { this.reverse(); }
-       };
-       LineSegment.prototype.angle = function angle () {
-         return Math.atan2(this.p1.y - this.p0.y, this.p1.x - this.p0.x)
-       };
-       LineSegment.prototype.getCoordinate = function getCoordinate (i) {
-         if (i === 0) { return this.p0 }
-         return this.p1
-       };
-       LineSegment.prototype.distancePerpendicular = function distancePerpendicular (p) {
-         return CGAlgorithms.distancePointLinePerpendicular(p, this.p0, this.p1)
-       };
-       LineSegment.prototype.minY = function minY () {
-         return Math.min(this.p0.y, this.p1.y)
-       };
-       LineSegment.prototype.midPoint = function midPoint () {
-         return LineSegment.midPoint(this.p0, this.p1)
-       };
-       LineSegment.prototype.projectionFactor = function projectionFactor (p) {
-         if (p.equals(this.p0)) { return 0.0 }
-         if (p.equals(this.p1)) { return 1.0 }
-         var dx = this.p1.x - this.p0.x;
-         var dy = this.p1.y - this.p0.y;
-         var len = dx * dx + dy * dy;
-         if (len <= 0.0) { return Double.NaN }
-         var r = ((p.x - this.p0.x) * dx + (p.y - this.p0.y) * dy) / len;
-         return r
-       };
-       LineSegment.prototype.closestPoints = function closestPoints (line) {
-         var intPt = this.intersection(line);
-         if (intPt !== null) {
-           return [intPt, intPt]
-         }
-         var closestPt = new Array(2).fill(null);
-         var minDistance = Double.MAX_VALUE;
-         var dist = null;
-         var close00 = this.closestPoint(line.p0);
-         minDistance = close00.distance(line.p0);
-         closestPt[0] = close00;
-         closestPt[1] = line.p0;
-         var close01 = this.closestPoint(line.p1);
-         dist = close01.distance(line.p1);
-         if (dist < minDistance) {
-           minDistance = dist;
-           closestPt[0] = close01;
-           closestPt[1] = line.p1;
-         }
-         var close10 = line.closestPoint(this.p0);
-         dist = close10.distance(this.p0);
-         if (dist < minDistance) {
-           minDistance = dist;
-           closestPt[0] = this.p0;
-           closestPt[1] = close10;
-         }
-         var close11 = line.closestPoint(this.p1);
-         dist = close11.distance(this.p1);
-         if (dist < minDistance) {
-           minDistance = dist;
-           closestPt[0] = this.p1;
-           closestPt[1] = close11;
-         }
-         return closestPt
-       };
-       LineSegment.prototype.closestPoint = function closestPoint (p) {
-         var factor = this.projectionFactor(p);
-         if (factor > 0 && factor < 1) {
-           return this.project(p)
-         }
-         var dist0 = this.p0.distance(p);
-         var dist1 = this.p1.distance(p);
-         if (dist0 < dist1) { return this.p0 }
-         return this.p1
-       };
-       LineSegment.prototype.maxX = function maxX () {
-         return Math.max(this.p0.x, this.p1.x)
-       };
-       LineSegment.prototype.getLength = function getLength () {
-         return this.p0.distance(this.p1)
-       };
-       LineSegment.prototype.compareTo = function compareTo (o) {
-         var other = o;
-         var comp0 = this.p0.compareTo(other.p0);
-         if (comp0 !== 0) { return comp0 }
-         return this.p1.compareTo(other.p1)
-       };
-       LineSegment.prototype.reverse = function reverse () {
-         var temp = this.p0;
-         this.p0 = this.p1;
-         this.p1 = temp;
-       };
-       LineSegment.prototype.equalsTopo = function equalsTopo (other) {
-         return this.p0.equals(other.p0) &&
-               (this.p1.equals(other.p1) || this.p0.equals(other.p1)) &&
-                this.p1.equals(other.p0)
-       };
-       LineSegment.prototype.lineIntersection = function lineIntersection (line) {
-         try {
-           var intPt = HCoordinate.intersection(this.p0, this.p1, line.p0, line.p1);
-           return intPt
-         } catch (ex) {
-           if (ex instanceof NotRepresentableException) ; else { throw ex }
-         } finally {}
-         return null
-       };
-       LineSegment.prototype.maxY = function maxY () {
-         return Math.max(this.p0.y, this.p1.y)
-       };
-       LineSegment.prototype.pointAlongOffset = function pointAlongOffset (segmentLengthFraction, offsetDistance) {
-         var segx = this.p0.x + segmentLengthFraction * (this.p1.x - this.p0.x);
-         var segy = this.p0.y + segmentLengthFraction * (this.p1.y - this.p0.y);
-         var dx = this.p1.x - this.p0.x;
-         var dy = this.p1.y - this.p0.y;
-         var len = Math.sqrt(dx * dx + dy * dy);
-         var ux = 0.0;
-         var uy = 0.0;
-         if (offsetDistance !== 0.0) {
-           if (len <= 0.0) { throw new Error('Cannot compute offset from zero-length line segment') }
-           ux = offsetDistance * dx / len;
-           uy = offsetDistance * dy / len;
-         }
-         var offsetx = segx - uy;
-         var offsety = segy + ux;
-         var coord = new Coordinate(offsetx, offsety);
-         return coord
-       };
-       LineSegment.prototype.setCoordinates = function setCoordinates () {
-         if (arguments.length === 1) {
-           var ls = arguments[0];
-           this.setCoordinates(ls.p0, ls.p1);
-         } else if (arguments.length === 2) {
-           var p0 = arguments[0];
-           var p1 = arguments[1];
-           this.p0.x = p0.x;
-           this.p0.y = p0.y;
-           this.p1.x = p1.x;
-           this.p1.y = p1.y;
-         }
-       };
-       LineSegment.prototype.segmentFraction = function segmentFraction (inputPt) {
-         var segFrac = this.projectionFactor(inputPt);
-         if (segFrac < 0.0) { segFrac = 0.0; } else if (segFrac > 1.0 || Double.isNaN(segFrac)) { segFrac = 1.0; }
-         return segFrac
-       };
-       LineSegment.prototype.toString = function toString () {
-         return 'LINESTRING( ' + this.p0.x + ' ' + this.p0.y + ', ' + this.p1.x + ' ' + this.p1.y + ')'
-       };
-       LineSegment.prototype.isHorizontal = function isHorizontal () {
-         return this.p0.y === this.p1.y
-       };
-       LineSegment.prototype.distance = function distance () {
-         if (arguments[0] instanceof LineSegment) {
-           var ls = arguments[0];
-           return CGAlgorithms.distanceLineLine(this.p0, this.p1, ls.p0, ls.p1)
-         } else if (arguments[0] instanceof Coordinate) {
-           var p = arguments[0];
-           return CGAlgorithms.distancePointLine(p, this.p0, this.p1)
-         }
-       };
-       LineSegment.prototype.pointAlong = function pointAlong (segmentLengthFraction) {
-         var coord = new Coordinate();
-         coord.x = this.p0.x + segmentLengthFraction * (this.p1.x - this.p0.x);
-         coord.y = this.p0.y + segmentLengthFraction * (this.p1.y - this.p0.y);
-         return coord
-       };
-       LineSegment.prototype.hashCode = function hashCode () {
-         var bits0 = Double.doubleToLongBits(this.p0.x);
-         bits0 ^= Double.doubleToLongBits(this.p0.y) * 31;
-         var hash0 = Math.trunc(bits0) ^ Math.trunc(bits0 >> 32);
-         var bits1 = Double.doubleToLongBits(this.p1.x);
-         bits1 ^= Double.doubleToLongBits(this.p1.y) * 31;
-         var hash1 = Math.trunc(bits1) ^ Math.trunc(bits1 >> 32);
-         return hash0 ^ hash1
-       };
-       LineSegment.prototype.interfaces_ = function interfaces_ () {
-         return [Comparable, Serializable]
-       };
-       LineSegment.prototype.getClass = function getClass () {
-         return LineSegment
-       };
-       LineSegment.midPoint = function midPoint (p0, p1) {
-         return new Coordinate((p0.x + p1.x) / 2, (p0.y + p1.y) / 2)
-       };
-       staticAccessors$24.serialVersionUID.get = function () { return 3252005833466256227 };
+               function sha256_Sigma1256(x) {
+                 return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
+               }

 
 

-       Object.defineProperties( LineSegment, staticAccessors$24 );
+               function sha256_Gamma0256(x) {
+                 return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
+               }

 
 

-       var MonotoneChainOverlapAction = function MonotoneChainOverlapAction () {
-         this.tempEnv1 = new Envelope();
-         this.tempEnv2 = new Envelope();
-         this._overlapSeg1 = new LineSegment();
-         this._overlapSeg2 = new LineSegment();
-       };
-       MonotoneChainOverlapAction.prototype.overlap = function overlap () {
-         if (arguments.length === 2) ; else if (arguments.length === 4) {
-           var mc1 = arguments[0];
-           var start1 = arguments[1];
-           var mc2 = arguments[2];
-           var start2 = arguments[3];
-           mc1.getLineSegment(start1, this._overlapSeg1);
-           mc2.getLineSegment(start2, this._overlapSeg2);
-           this.overlap(this._overlapSeg1, this._overlapSeg2);
-         }
-       };
-       MonotoneChainOverlapAction.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       MonotoneChainOverlapAction.prototype.getClass = function getClass () {
-         return MonotoneChainOverlapAction
-       };
+               function sha256_Gamma1256(x) {
+                 return sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10);
+               }

 
 

-       var MonotoneChain = function MonotoneChain () {
-         this._pts = null;
-         this._start = null;
-         this._end = null;
-         this._env = null;
-         this._context = null;
-         this._id = null;
-         var pts = arguments[0];
-         var start = arguments[1];
-         var end = arguments[2];
-         var context = arguments[3];
-         this._pts = pts;
-         this._start = start;
-         this._end = end;
-         this._context = context;
-       };
-       MonotoneChain.prototype.getLineSegment = function getLineSegment (index, ls) {
-         ls.p0 = this._pts[index];
-         ls.p1 = this._pts[index + 1];
-       };
-       MonotoneChain.prototype.computeSelect = function computeSelect (searchEnv, start0, end0, mcs) {
-         var p0 = this._pts[start0];
-         var p1 = this._pts[end0];
-         mcs.tempEnv1.init(p0, p1);
-         if (end0 - start0 === 1) {
-           mcs.select(this, start0);
-           return null
-         }
-         if (!searchEnv.intersects(mcs.tempEnv1)) { return null }
-         var mid = Math.trunc((start0 + end0) / 2);
-         if (start0 < mid) {
-           this.computeSelect(searchEnv, start0, mid, mcs);
-         }
-         if (mid < end0) {
-           this.computeSelect(searchEnv, mid, end0, mcs);
-         }
-       };
-       MonotoneChain.prototype.getCoordinates = function getCoordinates () {
-           var this$1 = this;
+               sha256_K = [1116352408, 1899447441, -1245643825, -373957723, 961987163, 1508970993, -1841331548, -1424204075, -670586216, 310598401, 607225278, 1426881987, 1925078388, -2132889090, -1680079193, -1046744716, -459576895, -272742522, 264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986, -1740746414, -1473132947, -1341970488, -1084653625, -958395405, -710438585, 113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291, 1695183700, 1986661051, -2117940946, -1838011259, -1564481375, -1474664885, -1035236496, -949202525, -778901479, -694614492, -200395387, 275423344, 430227734, 506948616, 659060556, 883997877, 958139571, 1322822218, 1537002063, 1747873779, 1955562222, 2024104815, -2067236844, -1933114872, -1866530822, -1538233109, -1090935817, -965641998];

 
 

-         var coord = new Array(this._end - this._start + 1).fill(null);
-         var index = 0;
-         for (var i = this._start; i <= this._end; i++) {
-           coord[index++] = this$1._pts[i];
-         }
-         return coord
-       };
-       MonotoneChain.prototype.computeOverlaps = function computeOverlaps (mc, mco) {
-         this.computeOverlapsInternal(this._start, this._end, mc, mc._start, mc._end, mco);
-       };
-       MonotoneChain.prototype.setId = function setId (id) {
-         this._id = id;
-       };
-       MonotoneChain.prototype.select = function select (searchEnv, mcs) {
-         this.computeSelect(searchEnv, this._start, this._end, mcs);
-       };
-       MonotoneChain.prototype.getEnvelope = function getEnvelope () {
-         if (this._env === null) {
-           var p0 = this._pts[this._start];
-           var p1 = this._pts[this._end];
-           this._env = new Envelope(p0, p1);
-         }
-         return this._env
-       };
-       MonotoneChain.prototype.getEndIndex = function getEndIndex () {
-         return this._end
-       };
-       MonotoneChain.prototype.getStartIndex = function getStartIndex () {
-         return this._start
-       };
-       MonotoneChain.prototype.getContext = function getContext () {
-         return this._context
-       };
-       MonotoneChain.prototype.getId = function getId () {
-         return this._id
-       };
-       MonotoneChain.prototype.computeOverlapsInternal = function computeOverlapsInternal (start0, end0, mc, start1, end1, mco) {
-         var p00 = this._pts[start0];
-         var p01 = this._pts[end0];
-         var p10 = mc._pts[start1];
-         var p11 = mc._pts[end1];
-         if (end0 - start0 === 1 && end1 - start1 === 1) {
-           mco.overlap(this, start0, mc, start1);
-           return null
-         }
-         mco.tempEnv1.init(p00, p01);
-         mco.tempEnv2.init(p10, p11);
-         if (!mco.tempEnv1.intersects(mco.tempEnv2)) { return null }
-         var mid0 = Math.trunc((start0 + end0) / 2);
-         var mid1 = Math.trunc((start1 + end1) / 2);
-         if (start0 < mid0) {
-           if (start1 < mid1) { this.computeOverlapsInternal(start0, mid0, mc, start1, mid1, mco); }
-           if (mid1 < end1) { this.computeOverlapsInternal(start0, mid0, mc, mid1, end1, mco); }
-         }
-         if (mid0 < end0) {
-           if (start1 < mid1) { this.computeOverlapsInternal(mid0, end0, mc, start1, mid1, mco); }
-           if (mid1 < end1) { this.computeOverlapsInternal(mid0, end0, mc, mid1, end1, mco); }
-         }
-       };
-       MonotoneChain.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       MonotoneChain.prototype.getClass = function getClass () {
-         return MonotoneChain
-       };
+               function binb(m, l) {
+                 var HASH = [1779033703, -1150833019, 1013904242, -1521486534, 1359893119, -1694144372, 528734635, 1541459225];
+                 var W = new Array(64);
+                 var a, b, c, d, e, f, g, h;
+                 var i, j, T1, T2;
+                 /* append padding */

 
 

-       var MonotoneChainBuilder = function MonotoneChainBuilder () {};
+                 m[l >> 5] |= 0x80 << 24 - l % 32;
+                 m[(l + 64 >> 9 << 4) + 15] = l;

 
 

-       MonotoneChainBuilder.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       MonotoneChainBuilder.prototype.getClass = function getClass () {
-         return MonotoneChainBuilder
-       };
-       MonotoneChainBuilder.getChainStartIndices = function getChainStartIndices (pts) {
-         var start = 0;
-         var startIndexList = new ArrayList();
-         startIndexList.add(new Integer(start));
-         do {
-           var last = MonotoneChainBuilder.findChainEnd(pts, start);
-           startIndexList.add(new Integer(last));
-           start = last;
-         } while (start < pts.length - 1)
-         var startIndex = MonotoneChainBuilder.toIntArray(startIndexList);
-         return startIndex
-       };
-       MonotoneChainBuilder.findChainEnd = function findChainEnd (pts, start) {
-         var safeStart = start;
-         while (safeStart < pts.length - 1 && pts[safeStart].equals2D(pts[safeStart + 1])) {
-           safeStart++;
-         }
-         if (safeStart >= pts.length - 1) {
-           return pts.length - 1
-         }
-         var chainQuad = Quadrant.quadrant(pts[safeStart], pts[safeStart + 1]);
-         var last = start + 1;
-         while (last < pts.length) {
-           if (!pts[last - 1].equals2D(pts[last])) {
-             var quad = Quadrant.quadrant(pts[last - 1], pts[last]);
-             if (quad !== chainQuad) { break }
-           }
-           last++;
-         }
-         return last - 1
-       };
-       MonotoneChainBuilder.getChains = function getChains () {
-         if (arguments.length === 1) {
-           var pts = arguments[0];
-           return MonotoneChainBuilder.getChains(pts, null)
-         } else if (arguments.length === 2) {
-           var pts$1 = arguments[0];
-           var context = arguments[1];
-           var mcList = new ArrayList();
-           var startIndex = MonotoneChainBuilder.getChainStartIndices(pts$1);
-           for (var i = 0; i < startIndex.length - 1; i++) {
-             var mc = new MonotoneChain(pts$1, startIndex[i], startIndex[i + 1], context);
-             mcList.add(mc);
-           }
-           return mcList
-         }
-       };
-       MonotoneChainBuilder.toIntArray = function toIntArray (list) {
-         var array = new Array(list.size()).fill(null);
-         for (var i = 0; i < array.length; i++) {
-           array[i] = list.get(i).intValue();
-         }
-         return array
-       };
+                 for (i = 0; i < m.length; i += 16) {
+                   a = HASH[0];
+                   b = HASH[1];
+                   c = HASH[2];
+                   d = HASH[3];
+                   e = HASH[4];
+                   f = HASH[5];
+                   g = HASH[6];
+                   h = HASH[7];

 
 

-       var Noder = function Noder () {};
+                   for (j = 0; j < 64; j += 1) {
+                     if (j < 16) {
+                       W[j] = m[j + i];
+                     } else {
+                       W[j] = safe_add(safe_add(safe_add(sha256_Gamma1256(W[j - 2]), W[j - 7]), sha256_Gamma0256(W[j - 15])), W[j - 16]);
+                     }

 
 

-       Noder.prototype.computeNodes = function computeNodes (segStrings) {};
-       Noder.prototype.getNodedSubstrings = function getNodedSubstrings () {};
-       Noder.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Noder.prototype.getClass = function getClass () {
-         return Noder
-       };
+                     T1 = safe_add(safe_add(safe_add(safe_add(h, sha256_Sigma1256(e)), sha256_Ch(e, f, g)), sha256_K[j]), W[j]);
+                     T2 = safe_add(sha256_Sigma0256(a), sha256_Maj(a, b, c));
+                     h = g;
+                     g = f;
+                     f = e;
+                     e = safe_add(d, T1);
+                     d = c;
+                     c = b;
+                     b = a;
+                     a = safe_add(T1, T2);
+                   }
+
+                   HASH[0] = safe_add(a, HASH[0]);
+                   HASH[1] = safe_add(b, HASH[1]);
+                   HASH[2] = safe_add(c, HASH[2]);
+                   HASH[3] = safe_add(d, HASH[3]);
+                   HASH[4] = safe_add(e, HASH[4]);
+                   HASH[5] = safe_add(f, HASH[5]);
+                   HASH[6] = safe_add(g, HASH[6]);
+                   HASH[7] = safe_add(h, HASH[7]);
+                 }

 
 

-       var SinglePassNoder = function SinglePassNoder () {
-         this._segInt = null;
-         if (arguments.length === 0) ; else if (arguments.length === 1) {
-           var segInt = arguments[0];
-           this.setSegmentIntersector(segInt);
-         }
-       };
-       SinglePassNoder.prototype.setSegmentIntersector = function setSegmentIntersector (segInt) {
-         this._segInt = segInt;
-       };
-       SinglePassNoder.prototype.interfaces_ = function interfaces_ () {
-         return [Noder]
-       };
-       SinglePassNoder.prototype.getClass = function getClass () {
-         return SinglePassNoder
-       };
+                 return HASH;
+               }
+             },

 
 

-       var MCIndexNoder = (function (SinglePassNoder$$1) {
-         function MCIndexNoder (si) {
-           if (si) { SinglePassNoder$$1.call(this, si); }
-           else { SinglePassNoder$$1.call(this); }
-           this._monoChains = new ArrayList();
-           this._index = new STRtree();
-           this._idCounter = 0;
-           this._nodedSegStrings = null;
-           this._nOverlaps = 0;
-         }
+             /**
+              * @class Hashes.SHA512
+              * @param {config}
+              *
+              * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined in FIPS 180-2
+              * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
+              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+              * See http://pajhome.org.uk/crypt/md5 for details.
+              */
+             SHA512: function SHA512(options) {
+               /**
+                * Private properties configuration variables. You may need to tweak these to be compatible with
+                * the server-side, but the defaults work in most cases.
+                * @see this.setUpperCase() method
+                * @see this.setPad() method
+                */
+               options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
+
+               var /* hexadecimal output case format. false - lowercase; true - uppercase  */
+               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',

 
 

-         if ( SinglePassNoder$$1 ) { MCIndexNoder.__proto__ = SinglePassNoder$$1; }
-         MCIndexNoder.prototype = Object.create( SinglePassNoder$$1 && SinglePassNoder$$1.prototype );
-         MCIndexNoder.prototype.constructor = MCIndexNoder;
+               /* base-64 pad character. Default '=' for strict RFC compliance   */
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,

 
 

-         var staticAccessors = { SegmentOverlapAction: { configurable: true } };
-         MCIndexNoder.prototype.getMonotoneChains = function getMonotoneChains () {
-           return this._monoChains
-         };
-         MCIndexNoder.prototype.getNodedSubstrings = function getNodedSubstrings () {
-           return NodedSegmentString.getNodedSubstrings(this._nodedSegStrings)
-         };
-         MCIndexNoder.prototype.getIndex = function getIndex () {
-           return this._index
-         };
-         MCIndexNoder.prototype.add = function add (segStr) {
-           var this$1 = this;
-
-           var segChains = MonotoneChainBuilder.getChains(segStr.getCoordinates(), segStr);
-           for (var i = segChains.iterator(); i.hasNext();) {
-             var mc = i.next();
-             mc.setId(this$1._idCounter++);
-             this$1._index.insert(mc.getEnvelope(), mc);
-             this$1._monoChains.add(mc);
-           }
-         };
-         MCIndexNoder.prototype.computeNodes = function computeNodes (inputSegStrings) {
-           var this$1 = this;
-
-           this._nodedSegStrings = inputSegStrings;
-           for (var i = inputSegStrings.iterator(); i.hasNext();) {
-             this$1.add(i.next());
-           }
-           this.intersectChains();
-         };
-         MCIndexNoder.prototype.intersectChains = function intersectChains () {
-           var this$1 = this;
-
-           var overlapAction = new SegmentOverlapAction(this._segInt);
-           for (var i = this._monoChains.iterator(); i.hasNext();) {
-             var queryChain = i.next();
-             var overlapChains = this$1._index.query(queryChain.getEnvelope());
-             for (var j = overlapChains.iterator(); j.hasNext();) {
-               var testChain = j.next();
-               if (testChain.getId() > queryChain.getId()) {
-                 queryChain.computeOverlaps(testChain, overlapAction);
-                 this$1._nOverlaps++;
-               }
-               if (this$1._segInt.isDone()) { return null }
-             }
-           }
-         };
-         MCIndexNoder.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         MCIndexNoder.prototype.getClass = function getClass () {
-           return MCIndexNoder
-         };
-         staticAccessors.SegmentOverlapAction.get = function () { return SegmentOverlapAction };
-
-         Object.defineProperties( MCIndexNoder, staticAccessors );
-
-         return MCIndexNoder;
-       }(SinglePassNoder));
-
-       var SegmentOverlapAction = (function (MonotoneChainOverlapAction$$1) {
-         function SegmentOverlapAction () {
-           MonotoneChainOverlapAction$$1.call(this);
-           this._si = null;
-           var si = arguments[0];
-           this._si = si;
-         }
-
-         if ( MonotoneChainOverlapAction$$1 ) { SegmentOverlapAction.__proto__ = MonotoneChainOverlapAction$$1; }
-         SegmentOverlapAction.prototype = Object.create( MonotoneChainOverlapAction$$1 && MonotoneChainOverlapAction$$1.prototype );
-         SegmentOverlapAction.prototype.constructor = SegmentOverlapAction;
-         SegmentOverlapAction.prototype.overlap = function overlap () {
-           if (arguments.length === 4) {
-             var mc1 = arguments[0];
-             var start1 = arguments[1];
-             var mc2 = arguments[2];
-             var start2 = arguments[3];
-             var ss1 = mc1.getContext();
-             var ss2 = mc2.getContext();
-             this._si.processIntersections(ss1, start1, ss2, start2);
-           } else { return MonotoneChainOverlapAction$$1.prototype.overlap.apply(this, arguments) }
-         };
-         SegmentOverlapAction.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         SegmentOverlapAction.prototype.getClass = function getClass () {
-           return SegmentOverlapAction
-         };
-
-         return SegmentOverlapAction;
-       }(MonotoneChainOverlapAction));
+               /* enable/disable utf8 encoding */
+               sha512_k;
+               /* privileged (public) methods */

 
 

-       var BufferParameters = function BufferParameters () {
-         this._quadrantSegments = BufferParameters.DEFAULT_QUADRANT_SEGMENTS;
-         this._endCapStyle = BufferParameters.CAP_ROUND;
-         this._joinStyle = BufferParameters.JOIN_ROUND;
-         this._mitreLimit = BufferParameters.DEFAULT_MITRE_LIMIT;
-         this._isSingleSided = false;
-         this._simplifyFactor = BufferParameters.DEFAULT_SIMPLIFY_FACTOR;
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s));
+               };

 
 

-         if (arguments.length === 0) ; else if (arguments.length === 1) {
-           var quadrantSegments = arguments[0];
-           this.setQuadrantSegments(quadrantSegments);
-         } else if (arguments.length === 2) {
-           var quadrantSegments$1 = arguments[0];
-           var endCapStyle = arguments[1];
-           this.setQuadrantSegments(quadrantSegments$1);
-           this.setEndCapStyle(endCapStyle);
-         } else if (arguments.length === 4) {
-           var quadrantSegments$2 = arguments[0];
-           var endCapStyle$1 = arguments[1];
-           var joinStyle = arguments[2];
-           var mitreLimit = arguments[3];
-           this.setQuadrantSegments(quadrantSegments$2);
-           this.setEndCapStyle(endCapStyle$1);
-           this.setJoinStyle(joinStyle);
-           this.setMitreLimit(mitreLimit);
-         }
-       };
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };

 
 

-       var staticAccessors$25 = { CAP_ROUND: { configurable: true },CAP_FLAT: { configurable: true },CAP_SQUARE: { configurable: true },JOIN_ROUND: { configurable: true },JOIN_MITRE: { configurable: true },JOIN_BEVEL: { configurable: true },DEFAULT_QUADRANT_SEGMENTS: { configurable: true },DEFAULT_MITRE_LIMIT: { configurable: true },DEFAULT_SIMPLIFY_FACTOR: { configurable: true } };
-       BufferParameters.prototype.getEndCapStyle = function getEndCapStyle () {
-         return this._endCapStyle
-       };
-       BufferParameters.prototype.isSingleSided = function isSingleSided () {
-         return this._isSingleSided
-       };
-       BufferParameters.prototype.setQuadrantSegments = function setQuadrantSegments (quadSegs) {
-         this._quadrantSegments = quadSegs;
-         if (this._quadrantSegments === 0) { this._joinStyle = BufferParameters.JOIN_BEVEL; }
-         if (this._quadrantSegments < 0) {
-           this._joinStyle = BufferParameters.JOIN_MITRE;
-           this._mitreLimit = Math.abs(this._quadrantSegments);
-         }
-         if (quadSegs <= 0) {
-           this._quadrantSegments = 1;
-         }
-         if (this._joinStyle !== BufferParameters.JOIN_ROUND) {
-           this._quadrantSegments = BufferParameters.DEFAULT_QUADRANT_SEGMENTS;
-         }
-       };
-       BufferParameters.prototype.getJoinStyle = function getJoinStyle () {
-         return this._joinStyle
-       };
-       BufferParameters.prototype.setJoinStyle = function setJoinStyle (joinStyle) {
-         this._joinStyle = joinStyle;
-       };
-       BufferParameters.prototype.setSimplifyFactor = function setSimplifyFactor (simplifyFactor) {
-         this._simplifyFactor = simplifyFactor < 0 ? 0 : simplifyFactor;
-       };
-       BufferParameters.prototype.getSimplifyFactor = function getSimplifyFactor () {
-         return this._simplifyFactor
-       };
-       BufferParameters.prototype.getQuadrantSegments = function getQuadrantSegments () {
-         return this._quadrantSegments
-       };
-       BufferParameters.prototype.setEndCapStyle = function setEndCapStyle (endCapStyle) {
-         this._endCapStyle = endCapStyle;
-       };
-       BufferParameters.prototype.getMitreLimit = function getMitreLimit () {
-         return this._mitreLimit
-       };
-       BufferParameters.prototype.setMitreLimit = function setMitreLimit (mitreLimit) {
-         this._mitreLimit = mitreLimit;
-       };
-       BufferParameters.prototype.setSingleSided = function setSingleSided (isSingleSided) {
-         this._isSingleSided = isSingleSided;
-       };
-       BufferParameters.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       BufferParameters.prototype.getClass = function getClass () {
-         return BufferParameters
-       };
-       BufferParameters.bufferDistanceError = function bufferDistanceError (quadSegs) {
-         var alpha = Math.PI / 2.0 / quadSegs;
-         return 1 - Math.cos(alpha / 2.0)
-       };
-       staticAccessors$25.CAP_ROUND.get = function () { return 1 };
-       staticAccessors$25.CAP_FLAT.get = function () { return 2 };
-       staticAccessors$25.CAP_SQUARE.get = function () { return 3 };
-       staticAccessors$25.JOIN_ROUND.get = function () { return 1 };
-       staticAccessors$25.JOIN_MITRE.get = function () { return 2 };
-       staticAccessors$25.JOIN_BEVEL.get = function () { return 3 };
-       staticAccessors$25.DEFAULT_QUADRANT_SEGMENTS.get = function () { return 8 };
-       staticAccessors$25.DEFAULT_MITRE_LIMIT.get = function () { return 5.0 };
-       staticAccessors$25.DEFAULT_SIMPLIFY_FACTOR.get = function () { return 0.01 };
-
-       Object.defineProperties( BufferParameters, staticAccessors$25 );
-
-       var BufferInputLineSimplifier = function BufferInputLineSimplifier (inputLine) {
-         this._distanceTol = null;
-         this._isDeleted = null;
-         this._angleOrientation = CGAlgorithms.COUNTERCLOCKWISE;
-         this._inputLine = inputLine || null;
-       };
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };

 
 

-       var staticAccessors$26 = { INIT: { configurable: true },DELETE: { configurable: true },KEEP: { configurable: true },NUM_PTS_TO_CHECK: { configurable: true } };
-       BufferInputLineSimplifier.prototype.isDeletable = function isDeletable (i0, i1, i2, distanceTol) {
-         var p0 = this._inputLine[i0];
-         var p1 = this._inputLine[i1];
-         var p2 = this._inputLine[i2];
-         if (!this.isConcave(p0, p1, p2)) { return false }
-         if (!this.isShallow(p0, p1, p2, distanceTol)) { return false }
-         return this.isShallowSampled(p0, p1, i0, i2, distanceTol)
-       };
-       BufferInputLineSimplifier.prototype.deleteShallowConcavities = function deleteShallowConcavities () {
-           var this$1 = this;
+               this.raw = function (s) {
+                 return rstr(s);
+               };

 
 

-         var index = 1;
-         // const maxIndex = this._inputLine.length - 1
-         var midIndex = this.findNextNonDeletedIndex(index);
-         var lastIndex = this.findNextNonDeletedIndex(midIndex);
-         var isChanged = false;
-         while (lastIndex < this._inputLine.length) {
-           var isMiddleVertexDeleted = false;
-           if (this$1.isDeletable(index, midIndex, lastIndex, this$1._distanceTol)) {
-             this$1._isDeleted[midIndex] = BufferInputLineSimplifier.DELETE;
-             isMiddleVertexDeleted = true;
-             isChanged = true;
-           }
-           if (isMiddleVertexDeleted) { index = lastIndex; } else { index = midIndex; }
-           midIndex = this$1.findNextNonDeletedIndex(index);
-           lastIndex = this$1.findNextNonDeletedIndex(midIndex);
-         }
-         return isChanged
-       };
-       BufferInputLineSimplifier.prototype.isShallowConcavity = function isShallowConcavity (p0, p1, p2, distanceTol) {
-         var orientation = CGAlgorithms.computeOrientation(p0, p1, p2);
-         var isAngleToSimplify = orientation === this._angleOrientation;
-         if (!isAngleToSimplify) { return false }
-         var dist = CGAlgorithms.distancePointLine(p1, p0, p2);
-         return dist < distanceTol
-       };
-       BufferInputLineSimplifier.prototype.isShallowSampled = function isShallowSampled (p0, p2, i0, i2, distanceTol) {
-           var this$1 = this;
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
+
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
+
+               this.any_hmac = function (k, d, e) {
+                 return rstr2any(rstr_hmac(k, d), e);
+               };
+               /**
+                * Perform a simple self-test to see if the VM is working
+                * @return {String} Hexadecimal hash sample
+                * @public
+                */
+
+
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * @description Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
+
+
+               this.setUpperCase = function (a) {
+
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */

 
 

-         var inc = Math.trunc((i2 - i0) / BufferInputLineSimplifier.NUM_PTS_TO_CHECK);
-         if (inc <= 0) { inc = 1; }
-         for (var i = i0; i < i2; i += inc) {
-           if (!this$1.isShallow(p0, p2, this$1._inputLine[i], distanceTol)) { return false }
-         }
-         return true
-       };
-       BufferInputLineSimplifier.prototype.isConcave = function isConcave (p0, p1, p2) {
-         var orientation = CGAlgorithms.computeOrientation(p0, p1, p2);
-         var isConcave = orientation === this._angleOrientation;
-         return isConcave
-       };
-       BufferInputLineSimplifier.prototype.simplify = function simplify (distanceTol) {
-           var this$1 = this;

 
 

-         this._distanceTol = Math.abs(distanceTol);
-         if (distanceTol < 0) { this._angleOrientation = CGAlgorithms.CLOCKWISE; }
-         this._isDeleted = new Array(this._inputLine.length).fill(null);
-         var isChanged = false;
-         do {
-           isChanged = this$1.deleteShallowConcavities();
-         } while (isChanged)
-         return this.collapseLine()
-       };
-       BufferInputLineSimplifier.prototype.findNextNonDeletedIndex = function findNextNonDeletedIndex (index) {
-         var next = index + 1;
-         while (next < this._inputLine.length && this._isDeleted[next] === BufferInputLineSimplifier.DELETE) { next++; }
-         return next
-       };
-       BufferInputLineSimplifier.prototype.isShallow = function isShallow (p0, p1, p2, distanceTol) {
-         var dist = CGAlgorithms.distancePointLine(p1, p0, p2);
-         return dist < distanceTol
-       };
-       BufferInputLineSimplifier.prototype.collapseLine = function collapseLine () {
-           var this$1 = this;
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */

 
 

-         var coordList = new CoordinateList();
-         for (var i = 0; i < this._inputLine.length; i++) {
-           if (this$1._isDeleted[i] !== BufferInputLineSimplifier.DELETE) { coordList.add(this$1._inputLine[i]); }
-         }
-         return coordList.toCoordinateArray()
-       };
-       BufferInputLineSimplifier.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       BufferInputLineSimplifier.prototype.getClass = function getClass () {
-         return BufferInputLineSimplifier
-       };
-       BufferInputLineSimplifier.simplify = function simplify (inputLine, distanceTol) {
-         var simp = new BufferInputLineSimplifier(inputLine);
-         return simp.simplify(distanceTol)
-       };
-       staticAccessors$26.INIT.get = function () { return 0 };
-       staticAccessors$26.DELETE.get = function () { return 1 };
-       staticAccessors$26.KEEP.get = function () { return 1 };
-       staticAccessors$26.NUM_PTS_TO_CHECK.get = function () { return 10 };
-
-       Object.defineProperties( BufferInputLineSimplifier, staticAccessors$26 );
-
-       var OffsetSegmentString = function OffsetSegmentString () {
-         this._ptList = null;
-         this._precisionModel = null;
-         this._minimimVertexDistance = 0.0;
-         this._ptList = new ArrayList();
-       };

 
 

-       var staticAccessors$28 = { COORDINATE_ARRAY_TYPE: { configurable: true } };
-       OffsetSegmentString.prototype.getCoordinates = function getCoordinates () {
-         var coord = this._ptList.toArray(OffsetSegmentString.COORDINATE_ARRAY_TYPE);
-         return coord
-       };
-       OffsetSegmentString.prototype.setPrecisionModel = function setPrecisionModel (precisionModel) {
-         this._precisionModel = precisionModel;
-       };
-       OffsetSegmentString.prototype.addPt = function addPt (pt) {
-         var bufPt = new Coordinate(pt);
-         this._precisionModel.makePrecise(bufPt);
-         if (this.isRedundant(bufPt)) { return null }
-         this._ptList.add(bufPt);
-       };
-       OffsetSegmentString.prototype.revere = function revere () {};
-       OffsetSegmentString.prototype.addPts = function addPts (pt, isForward) {
-           var this$1 = this;
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }

 
 

-         if (isForward) {
-           for (var i = 0; i < pt.length; i++) {
-             this$1.addPt(pt[i]);
-           }
-         } else {
-           for (var i$1 = pt.length - 1; i$1 >= 0; i$1--) {
-             this$1.addPt(pt[i$1]);
-           }
-         }
-       };
-       OffsetSegmentString.prototype.isRedundant = function isRedundant (pt) {
-         if (this._ptList.size() < 1) { return false }
-         var lastPt = this._ptList.get(this._ptList.size() - 1);
-         var ptDist = pt.distance(lastPt);
-         if (ptDist < this._minimimVertexDistance) { return true }
-         return false
-       };
-       OffsetSegmentString.prototype.toString = function toString () {
-         var fact = new GeometryFactory();
-         var line = fact.createLineString(this.getCoordinates());
-         return line.toString()
-       };
-       OffsetSegmentString.prototype.closeRing = function closeRing () {
-         if (this._ptList.size() < 1) { return null }
-         var startPt = new Coordinate(this._ptList.get(0));
-         var lastPt = this._ptList.get(this._ptList.size() - 1);
-         // const last2Pt = null
-         // if (this._ptList.size() >= 2) last2Pt = this._ptList.get(this._ptList.size() - 2)
-         if (startPt.equals(lastPt)) { return null }
-         this._ptList.add(startPt);
-       };
-       OffsetSegmentString.prototype.setMinimumVertexDistance = function setMinimumVertexDistance (minimimVertexDistance) {
-         this._minimimVertexDistance = minimimVertexDistance;
-       };
-       OffsetSegmentString.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       OffsetSegmentString.prototype.getClass = function getClass () {
-         return OffsetSegmentString
-       };
-       staticAccessors$28.COORDINATE_ARRAY_TYPE.get = function () { return new Array(0).fill(null) };
+                 return this;
+               };
+               /* private methods */

 
 

-       Object.defineProperties( OffsetSegmentString, staticAccessors$28 );
+               /**
+                * Calculate the SHA-512 of a raw string
+                */

 
 

-       var Angle = function Angle () {};

 
 

-       var staticAccessors$29 = { PI_TIMES_2: { configurable: true },PI_OVER_2: { configurable: true },PI_OVER_4: { configurable: true },COUNTERCLOCKWISE: { configurable: true },CLOCKWISE: { configurable: true },NONE: { configurable: true } };
+               function rstr(s) {
+                 s = utf8 ? utf8Encode(s) : s;
+                 return binb2rstr(binb(rstr2binb(s), s.length * 8));
+               }
+               /*
+                * Calculate the HMAC-SHA-512 of a key and some data (raw strings)
+                */

 
 

-       Angle.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Angle.prototype.getClass = function getClass () {
-         return Angle
-       };
-       Angle.toDegrees = function toDegrees (radians) {
-         return radians * 180 / Math.PI
-       };
-       Angle.normalize = function normalize (angle) {
-         while (angle > Math.PI) { angle -= Angle.PI_TIMES_2; }
-         while (angle <= -Math.PI) { angle += Angle.PI_TIMES_2; }
-         return angle
-       };
-       Angle.angle = function angle () {
-         if (arguments.length === 1) {
-           var p = arguments[0];
-           return Math.atan2(p.y, p.x)
-         } else if (arguments.length === 2) {
-           var p0 = arguments[0];
-           var p1 = arguments[1];
-           var dx = p1.x - p0.x;
-           var dy = p1.y - p0.y;
-           return Math.atan2(dy, dx)
-         }
-       };
-       Angle.isAcute = function isAcute (p0, p1, p2) {
-         var dx0 = p0.x - p1.x;
-         var dy0 = p0.y - p1.y;
-         var dx1 = p2.x - p1.x;
-         var dy1 = p2.y - p1.y;
-         var dotprod = dx0 * dx1 + dy0 * dy1;
-         return dotprod > 0
-       };
-       Angle.isObtuse = function isObtuse (p0, p1, p2) {
-         var dx0 = p0.x - p1.x;
-         var dy0 = p0.y - p1.y;
-         var dx1 = p2.x - p1.x;
-         var dy1 = p2.y - p1.y;
-         var dotprod = dx0 * dx1 + dy0 * dy1;
-         return dotprod < 0
-       };
-       Angle.interiorAngle = function interiorAngle (p0, p1, p2) {
-         var anglePrev = Angle.angle(p1, p0);
-         var angleNext = Angle.angle(p1, p2);
-         return Math.abs(angleNext - anglePrev)
-       };
-       Angle.normalizePositive = function normalizePositive (angle) {
-         if (angle < 0.0) {
-           while (angle < 0.0) { angle += Angle.PI_TIMES_2; }
-           if (angle >= Angle.PI_TIMES_2) { angle = 0.0; }
-         } else {
-           while (angle >= Angle.PI_TIMES_2) { angle -= Angle.PI_TIMES_2; }
-           if (angle < 0.0) { angle = 0.0; }
-         }
-         return angle
-       };
-       Angle.angleBetween = function angleBetween (tip1, tail, tip2) {
-         var a1 = Angle.angle(tail, tip1);
-         var a2 = Angle.angle(tail, tip2);
-         return Angle.diff(a1, a2)
-       };
-       Angle.diff = function diff (ang1, ang2) {
-         var delAngle = null;
-         if (ang1 < ang2) {
-           delAngle = ang2 - ang1;
-         } else {
-           delAngle = ang1 - ang2;
-         }
-         if (delAngle > Math.PI) {
-           delAngle = 2 * Math.PI - delAngle;
-         }
-         return delAngle
-       };
-       Angle.toRadians = function toRadians (angleDegrees) {
-         return angleDegrees * Math.PI / 180.0
-       };
-       Angle.getTurn = function getTurn (ang1, ang2) {
-         var crossproduct = Math.sin(ang2 - ang1);
-         if (crossproduct > 0) {
-           return Angle.COUNTERCLOCKWISE
-         }
-         if (crossproduct < 0) {
-           return Angle.CLOCKWISE
-         }
-         return Angle.NONE
-       };
-       Angle.angleBetweenOriented = function angleBetweenOriented (tip1, tail, tip2) {
-         var a1 = Angle.angle(tail, tip1);
-         var a2 = Angle.angle(tail, tip2);
-         var angDel = a2 - a1;
-         if (angDel <= -Math.PI) { return angDel + Angle.PI_TIMES_2 }
-         if (angDel > Math.PI) { return angDel - Angle.PI_TIMES_2 }
-         return angDel
-       };
-       staticAccessors$29.PI_TIMES_2.get = function () { return 2.0 * Math.PI };
-       staticAccessors$29.PI_OVER_2.get = function () { return Math.PI / 2.0 };
-       staticAccessors$29.PI_OVER_4.get = function () { return Math.PI / 4.0 };
-       staticAccessors$29.COUNTERCLOCKWISE.get = function () { return CGAlgorithms.COUNTERCLOCKWISE };
-       staticAccessors$29.CLOCKWISE.get = function () { return CGAlgorithms.CLOCKWISE };
-       staticAccessors$29.NONE.get = function () { return CGAlgorithms.COLLINEAR };
-
-       Object.defineProperties( Angle, staticAccessors$29 );
-
-       var OffsetSegmentGenerator = function OffsetSegmentGenerator () {
-         this._maxCurveSegmentError = 0.0;
-         this._filletAngleQuantum = null;
-         this._closingSegLengthFactor = 1;
-         this._segList = null;
-         this._distance = 0.0;
-         this._precisionModel = null;
-         this._bufParams = null;
-         this._li = null;
-         this._s0 = null;
-         this._s1 = null;
-         this._s2 = null;
-         this._seg0 = new LineSegment();
-         this._seg1 = new LineSegment();
-         this._offset0 = new LineSegment();
-         this._offset1 = new LineSegment();
-         this._side = 0;
-         this._hasNarrowConcaveAngle = false;
-         var precisionModel = arguments[0];
-         var bufParams = arguments[1];
-         var distance = arguments[2];
-         this._precisionModel = precisionModel;
-         this._bufParams = bufParams;
-         this._li = new RobustLineIntersector();
-         this._filletAngleQuantum = Math.PI / 2.0 / bufParams.getQuadrantSegments();
-         if (bufParams.getQuadrantSegments() >= 8 && bufParams.getJoinStyle() === BufferParameters.JOIN_ROUND) { this._closingSegLengthFactor = OffsetSegmentGenerator.MAX_CLOSING_SEG_LEN_FACTOR; }
-         this.init(distance);
-       };

 
 

-       var staticAccessors$27 = { OFFSET_SEGMENT_SEPARATION_FACTOR: { configurable: true },INSIDE_TURN_VERTEX_SNAP_DISTANCE_FACTOR: { configurable: true },CURVE_VERTEX_SNAP_DISTANCE_FACTOR: { configurable: true },MAX_CLOSING_SEG_LEN_FACTOR: { configurable: true } };
-       OffsetSegmentGenerator.prototype.addNextSegment = function addNextSegment (p, addStartPoint) {
-         this._s0 = this._s1;
-         this._s1 = this._s2;
-         this._s2 = p;
-         this._seg0.setCoordinates(this._s0, this._s1);
-         this.computeOffsetSegment(this._seg0, this._side, this._distance, this._offset0);
-         this._seg1.setCoordinates(this._s1, this._s2);
-         this.computeOffsetSegment(this._seg1, this._side, this._distance, this._offset1);
-         if (this._s1.equals(this._s2)) { return null }
-         var orientation = CGAlgorithms.computeOrientation(this._s0, this._s1, this._s2);
-         var outsideTurn = (orientation === CGAlgorithms.CLOCKWISE && this._side === Position.LEFT) || (orientation === CGAlgorithms.COUNTERCLOCKWISE && this._side === Position.RIGHT);
-         if (orientation === 0) {
-           this.addCollinear(addStartPoint);
-         } else if (outsideTurn) {
-           this.addOutsideTurn(orientation, addStartPoint);
-         } else {
-           this.addInsideTurn(orientation, addStartPoint);
-         }
-       };
-       OffsetSegmentGenerator.prototype.addLineEndCap = function addLineEndCap (p0, p1) {
-         var seg = new LineSegment(p0, p1);
-         var offsetL = new LineSegment();
-         this.computeOffsetSegment(seg, Position.LEFT, this._distance, offsetL);
-         var offsetR = new LineSegment();
-         this.computeOffsetSegment(seg, Position.RIGHT, this._distance, offsetR);
-         var dx = p1.x - p0.x;
-         var dy = p1.y - p0.y;
-         var angle = Math.atan2(dy, dx);
-         switch (this._bufParams.getEndCapStyle()) {
-           case BufferParameters.CAP_ROUND:
-             this._segList.addPt(offsetL.p1);
-             this.addFilletArc(p1, angle + Math.PI / 2, angle - Math.PI / 2, CGAlgorithms.CLOCKWISE, this._distance);
-             this._segList.addPt(offsetR.p1);
-             break
-           case BufferParameters.CAP_FLAT:
-             this._segList.addPt(offsetL.p1);
-             this._segList.addPt(offsetR.p1);
-             break
-           case BufferParameters.CAP_SQUARE:
-             var squareCapSideOffset = new Coordinate();
-             squareCapSideOffset.x = Math.abs(this._distance) * Math.cos(angle);
-             squareCapSideOffset.y = Math.abs(this._distance) * Math.sin(angle);
-             var squareCapLOffset = new Coordinate(offsetL.p1.x + squareCapSideOffset.x, offsetL.p1.y + squareCapSideOffset.y);
-             var squareCapROffset = new Coordinate(offsetR.p1.x + squareCapSideOffset.x, offsetR.p1.y + squareCapSideOffset.y);
-             this._segList.addPt(squareCapLOffset);
-             this._segList.addPt(squareCapROffset);
-             break
-         }
-       };
-       OffsetSegmentGenerator.prototype.getCoordinates = function getCoordinates () {
-         var pts = this._segList.getCoordinates();
-         return pts
-       };
-       OffsetSegmentGenerator.prototype.addMitreJoin = function addMitreJoin (p, offset0, offset1, distance) {
-         var isMitreWithinLimit = true;
-         var intPt = null;
-         try {
-           intPt = HCoordinate.intersection(offset0.p0, offset0.p1, offset1.p0, offset1.p1);
-           var mitreRatio = distance <= 0.0 ? 1.0 : intPt.distance(p) / Math.abs(distance);
-           if (mitreRatio > this._bufParams.getMitreLimit()) { isMitreWithinLimit = false; }
-         } catch (ex) {
-           if (ex instanceof NotRepresentableException) {
-             intPt = new Coordinate(0, 0);
-             isMitreWithinLimit = false;
-           } else { throw ex }
-         } finally {}
-         if (isMitreWithinLimit) {
-           this._segList.addPt(intPt);
-         } else {
-           this.addLimitedMitreJoin(offset0, offset1, distance, this._bufParams.getMitreLimit());
-         }
-       };
-       OffsetSegmentGenerator.prototype.addFilletCorner = function addFilletCorner (p, p0, p1, direction, radius) {
-         var dx0 = p0.x - p.x;
-         var dy0 = p0.y - p.y;
-         var startAngle = Math.atan2(dy0, dx0);
-         var dx1 = p1.x - p.x;
-         var dy1 = p1.y - p.y;
-         var endAngle = Math.atan2(dy1, dx1);
-         if (direction === CGAlgorithms.CLOCKWISE) {
-           if (startAngle <= endAngle) { startAngle += 2.0 * Math.PI; }
-         } else {
-           if (startAngle >= endAngle) { startAngle -= 2.0 * Math.PI; }
-         }
-         this._segList.addPt(p0);
-         this.addFilletArc(p, startAngle, endAngle, direction, radius);
-         this._segList.addPt(p1);
-       };
-       OffsetSegmentGenerator.prototype.addOutsideTurn = function addOutsideTurn (orientation, addStartPoint) {
-         if (this._offset0.p1.distance(this._offset1.p0) < this._distance * OffsetSegmentGenerator.OFFSET_SEGMENT_SEPARATION_FACTOR) {
-           this._segList.addPt(this._offset0.p1);
-           return null
-         }
-         if (this._bufParams.getJoinStyle() === BufferParameters.JOIN_MITRE) {
-           this.addMitreJoin(this._s1, this._offset0, this._offset1, this._distance);
-         } else if (this._bufParams.getJoinStyle() === BufferParameters.JOIN_BEVEL) {
-           this.addBevelJoin(this._offset0, this._offset1);
-         } else {
-           if (addStartPoint) { this._segList.addPt(this._offset0.p1); }
-           this.addFilletCorner(this._s1, this._offset0.p1, this._offset1.p0, orientation, this._distance);
-           this._segList.addPt(this._offset1.p0);
-         }
-       };
-       OffsetSegmentGenerator.prototype.createSquare = function createSquare (p) {
-         this._segList.addPt(new Coordinate(p.x + this._distance, p.y + this._distance));
-         this._segList.addPt(new Coordinate(p.x + this._distance, p.y - this._distance));
-         this._segList.addPt(new Coordinate(p.x - this._distance, p.y - this._distance));
-         this._segList.addPt(new Coordinate(p.x - this._distance, p.y + this._distance));
-         this._segList.closeRing();
-       };
-       OffsetSegmentGenerator.prototype.addSegments = function addSegments (pt, isForward) {
-         this._segList.addPts(pt, isForward);
-       };
-       OffsetSegmentGenerator.prototype.addFirstSegment = function addFirstSegment () {
-         this._segList.addPt(this._offset1.p0);
-       };
-       OffsetSegmentGenerator.prototype.addLastSegment = function addLastSegment () {
-         this._segList.addPt(this._offset1.p1);
-       };
-       OffsetSegmentGenerator.prototype.initSideSegments = function initSideSegments (s1, s2, side) {
-         this._s1 = s1;
-         this._s2 = s2;
-         this._side = side;
-         this._seg1.setCoordinates(s1, s2);
-         this.computeOffsetSegment(this._seg1, side, this._distance, this._offset1);
-       };
-       OffsetSegmentGenerator.prototype.addLimitedMitreJoin = function addLimitedMitreJoin (offset0, offset1, distance, mitreLimit) {
-         var basePt = this._seg0.p1;
-         var ang0 = Angle.angle(basePt, this._seg0.p0);
-         // const ang1 = Angle.angle(basePt, this._seg1.p1)
-         var angDiff = Angle.angleBetweenOriented(this._seg0.p0, basePt, this._seg1.p1);
-         var angDiffHalf = angDiff / 2;
-         var midAng = Angle.normalize(ang0 + angDiffHalf);
-         var mitreMidAng = Angle.normalize(midAng + Math.PI);
-         var mitreDist = mitreLimit * distance;
-         var bevelDelta = mitreDist * Math.abs(Math.sin(angDiffHalf));
-         var bevelHalfLen = distance - bevelDelta;
-         var bevelMidX = basePt.x + mitreDist * Math.cos(mitreMidAng);
-         var bevelMidY = basePt.y + mitreDist * Math.sin(mitreMidAng);
-         var bevelMidPt = new Coordinate(bevelMidX, bevelMidY);
-         var mitreMidLine = new LineSegment(basePt, bevelMidPt);
-         var bevelEndLeft = mitreMidLine.pointAlongOffset(1.0, bevelHalfLen);
-         var bevelEndRight = mitreMidLine.pointAlongOffset(1.0, -bevelHalfLen);
-         if (this._side === Position.LEFT) {
-           this._segList.addPt(bevelEndLeft);
-           this._segList.addPt(bevelEndRight);
-         } else {
-           this._segList.addPt(bevelEndRight);
-           this._segList.addPt(bevelEndLeft);
-         }
-       };
-       OffsetSegmentGenerator.prototype.computeOffsetSegment = function computeOffsetSegment (seg, side, distance, offset) {
-         var sideSign = side === Position.LEFT ? 1 : -1;
-         var dx = seg.p1.x - seg.p0.x;
-         var dy = seg.p1.y - seg.p0.y;
-         var len = Math.sqrt(dx * dx + dy * dy);
-         var ux = sideSign * distance * dx / len;
-         var uy = sideSign * distance * dy / len;
-         offset.p0.x = seg.p0.x - uy;
-         offset.p0.y = seg.p0.y + ux;
-         offset.p1.x = seg.p1.x - uy;
-         offset.p1.y = seg.p1.y + ux;
-       };
-       OffsetSegmentGenerator.prototype.addFilletArc = function addFilletArc (p, startAngle, endAngle, direction, radius) {
-           var this$1 = this;
-
-         var directionFactor = direction === CGAlgorithms.CLOCKWISE ? -1 : 1;
-         var totalAngle = Math.abs(startAngle - endAngle);
-         var nSegs = Math.trunc(totalAngle / this._filletAngleQuantum + 0.5);
-         if (nSegs < 1) { return null }
-         var initAngle = 0.0;
-         var currAngleInc = totalAngle / nSegs;
-         var currAngle = initAngle;
-         var pt = new Coordinate();
-         while (currAngle < totalAngle) {
-           var angle = startAngle + directionFactor * currAngle;
-           pt.x = p.x + radius * Math.cos(angle);
-           pt.y = p.y + radius * Math.sin(angle);
-           this$1._segList.addPt(pt);
-           currAngle += currAngleInc;
-         }
-       };
-       OffsetSegmentGenerator.prototype.addInsideTurn = function addInsideTurn (orientation, addStartPoint) {
-         this._li.computeIntersection(this._offset0.p0, this._offset0.p1, this._offset1.p0, this._offset1.p1);
-         if (this._li.hasIntersection()) {
-           this._segList.addPt(this._li.getIntersection(0));
-         } else {
-           this._hasNarrowConcaveAngle = true;
-           if (this._offset0.p1.distance(this._offset1.p0) < this._distance * OffsetSegmentGenerator.INSIDE_TURN_VERTEX_SNAP_DISTANCE_FACTOR) {
-             this._segList.addPt(this._offset0.p1);
-           } else {
-             this._segList.addPt(this._offset0.p1);
-             if (this._closingSegLengthFactor > 0) {
-               var mid0 = new Coordinate((this._closingSegLengthFactor * this._offset0.p1.x + this._s1.x) / (this._closingSegLengthFactor + 1), (this._closingSegLengthFactor * this._offset0.p1.y + this._s1.y) / (this._closingSegLengthFactor + 1));
-               this._segList.addPt(mid0);
-               var mid1 = new Coordinate((this._closingSegLengthFactor * this._offset1.p0.x + this._s1.x) / (this._closingSegLengthFactor + 1), (this._closingSegLengthFactor * this._offset1.p0.y + this._s1.y) / (this._closingSegLengthFactor + 1));
-               this._segList.addPt(mid1);
-             } else {
-               this._segList.addPt(this._s1);
-             }
-             this._segList.addPt(this._offset1.p0);
-           }
-         }
-       };
-       OffsetSegmentGenerator.prototype.createCircle = function createCircle (p) {
-         var pt = new Coordinate(p.x + this._distance, p.y);
-         this._segList.addPt(pt);
-         this.addFilletArc(p, 0.0, 2.0 * Math.PI, -1, this._distance);
-         this._segList.closeRing();
-       };
-       OffsetSegmentGenerator.prototype.addBevelJoin = function addBevelJoin (offset0, offset1) {
-         this._segList.addPt(offset0.p1);
-         this._segList.addPt(offset1.p0);
-       };
-       OffsetSegmentGenerator.prototype.init = function init (distance) {
-         this._distance = distance;
-         this._maxCurveSegmentError = distance * (1 - Math.cos(this._filletAngleQuantum / 2.0));
-         this._segList = new OffsetSegmentString();
-         this._segList.setPrecisionModel(this._precisionModel);
-         this._segList.setMinimumVertexDistance(distance * OffsetSegmentGenerator.CURVE_VERTEX_SNAP_DISTANCE_FACTOR);
-       };
-       OffsetSegmentGenerator.prototype.addCollinear = function addCollinear (addStartPoint) {
-         this._li.computeIntersection(this._s0, this._s1, this._s1, this._s2);
-         var numInt = this._li.getIntersectionNum();
-         if (numInt >= 2) {
-           if (this._bufParams.getJoinStyle() === BufferParameters.JOIN_BEVEL || this._bufParams.getJoinStyle() === BufferParameters.JOIN_MITRE) {
-             if (addStartPoint) { this._segList.addPt(this._offset0.p1); }
-             this._segList.addPt(this._offset1.p0);
-           } else {
-             this.addFilletCorner(this._s1, this._offset0.p1, this._offset1.p0, CGAlgorithms.CLOCKWISE, this._distance);
-           }
-         }
-       };
-       OffsetSegmentGenerator.prototype.closeRing = function closeRing () {
-         this._segList.closeRing();
-       };
-       OffsetSegmentGenerator.prototype.hasNarrowConcaveAngle = function hasNarrowConcaveAngle () {
-         return this._hasNarrowConcaveAngle
-       };
-       OffsetSegmentGenerator.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       OffsetSegmentGenerator.prototype.getClass = function getClass () {
-         return OffsetSegmentGenerator
-       };
-       staticAccessors$27.OFFSET_SEGMENT_SEPARATION_FACTOR.get = function () { return 1.0E-3 };
-       staticAccessors$27.INSIDE_TURN_VERTEX_SNAP_DISTANCE_FACTOR.get = function () { return 1.0E-3 };
-       staticAccessors$27.CURVE_VERTEX_SNAP_DISTANCE_FACTOR.get = function () { return 1.0E-6 };
-       staticAccessors$27.MAX_CLOSING_SEG_LEN_FACTOR.get = function () { return 80 };
-
-       Object.defineProperties( OffsetSegmentGenerator, staticAccessors$27 );
-
-       var OffsetCurveBuilder = function OffsetCurveBuilder () {
-         this._distance = 0.0;
-         this._precisionModel = null;
-         this._bufParams = null;
-         var precisionModel = arguments[0];
-         var bufParams = arguments[1];
-         this._precisionModel = precisionModel;
-         this._bufParams = bufParams;
-       };
-       OffsetCurveBuilder.prototype.getOffsetCurve = function getOffsetCurve (inputPts, distance) {
-         this._distance = distance;
-         if (distance === 0.0) { return null }
-         var isRightSide = distance < 0.0;
-         var posDistance = Math.abs(distance);
-         var segGen = this.getSegGen(posDistance);
-         if (inputPts.length <= 1) {
-           this.computePointCurve(inputPts[0], segGen);
-         } else {
-           this.computeOffsetCurve(inputPts, isRightSide, segGen);
-         }
-         var curvePts = segGen.getCoordinates();
-         if (isRightSide) { CoordinateArrays.reverse(curvePts); }
-         return curvePts
-       };
-       OffsetCurveBuilder.prototype.computeSingleSidedBufferCurve = function computeSingleSidedBufferCurve (inputPts, isRightSide, segGen) {
-         var distTol = this.simplifyTolerance(this._distance);
-         if (isRightSide) {
-           segGen.addSegments(inputPts, true);
-           var simp2 = BufferInputLineSimplifier.simplify(inputPts, -distTol);
-           var n2 = simp2.length - 1;
-           segGen.initSideSegments(simp2[n2], simp2[n2 - 1], Position.LEFT);
-           segGen.addFirstSegment();
-           for (var i = n2 - 2; i >= 0; i--) {
-             segGen.addNextSegment(simp2[i], true);
-           }
-         } else {
-           segGen.addSegments(inputPts, false);
-           var simp1 = BufferInputLineSimplifier.simplify(inputPts, distTol);
-           var n1 = simp1.length - 1;
-           segGen.initSideSegments(simp1[0], simp1[1], Position.LEFT);
-           segGen.addFirstSegment();
-           for (var i$1 = 2; i$1 <= n1; i$1++) {
-             segGen.addNextSegment(simp1[i$1], true);
-           }
-         }
-         segGen.addLastSegment();
-         segGen.closeRing();
-       };
-       OffsetCurveBuilder.prototype.computeRingBufferCurve = function computeRingBufferCurve (inputPts, side, segGen) {
-         var distTol = this.simplifyTolerance(this._distance);
-         if (side === Position.RIGHT) { distTol = -distTol; }
-         var simp = BufferInputLineSimplifier.simplify(inputPts, distTol);
-         var n = simp.length - 1;
-         segGen.initSideSegments(simp[n - 1], simp[0], side);
-         for (var i = 1; i <= n; i++) {
-           var addStartPoint = i !== 1;
-           segGen.addNextSegment(simp[i], addStartPoint);
-         }
-         segGen.closeRing();
-       };
-       OffsetCurveBuilder.prototype.computeLineBufferCurve = function computeLineBufferCurve (inputPts, segGen) {
-         var distTol = this.simplifyTolerance(this._distance);
-         var simp1 = BufferInputLineSimplifier.simplify(inputPts, distTol);
-         var n1 = simp1.length - 1;
-         segGen.initSideSegments(simp1[0], simp1[1], Position.LEFT);
-         for (var i = 2; i <= n1; i++) {
-           segGen.addNextSegment(simp1[i], true);
-         }
-         segGen.addLastSegment();
-         segGen.addLineEndCap(simp1[n1 - 1], simp1[n1]);
-         var simp2 = BufferInputLineSimplifier.simplify(inputPts, -distTol);
-         var n2 = simp2.length - 1;
-         segGen.initSideSegments(simp2[n2], simp2[n2 - 1], Position.LEFT);
-         for (var i$1 = n2 - 2; i$1 >= 0; i$1--) {
-           segGen.addNextSegment(simp2[i$1], true);
-         }
-         segGen.addLastSegment();
-         segGen.addLineEndCap(simp2[1], simp2[0]);
-         segGen.closeRing();
-       };
-       OffsetCurveBuilder.prototype.computePointCurve = function computePointCurve (pt, segGen) {
-         switch (this._bufParams.getEndCapStyle()) {
-           case BufferParameters.CAP_ROUND:
-             segGen.createCircle(pt);
-             break
-           case BufferParameters.CAP_SQUARE:
-             segGen.createSquare(pt);
-             break
-         }
-       };
-       OffsetCurveBuilder.prototype.getLineCurve = function getLineCurve (inputPts, distance) {
-         this._distance = distance;
-         if (distance < 0.0 && !this._bufParams.isSingleSided()) { return null }
-         if (distance === 0.0) { return null }
-         var posDistance = Math.abs(distance);
-         var segGen = this.getSegGen(posDistance);
-         if (inputPts.length <= 1) {
-           this.computePointCurve(inputPts[0], segGen);
-         } else {
-           if (this._bufParams.isSingleSided()) {
-             var isRightSide = distance < 0.0;
-             this.computeSingleSidedBufferCurve(inputPts, isRightSide, segGen);
-           } else { this.computeLineBufferCurve(inputPts, segGen); }
-         }
-         var lineCoord = segGen.getCoordinates();
-         return lineCoord
-       };
-       OffsetCurveBuilder.prototype.getBufferParameters = function getBufferParameters () {
-         return this._bufParams
-       };
-       OffsetCurveBuilder.prototype.simplifyTolerance = function simplifyTolerance (bufDistance) {
-         return bufDistance * this._bufParams.getSimplifyFactor()
-       };
-       OffsetCurveBuilder.prototype.getRingCurve = function getRingCurve (inputPts, side, distance) {
-         this._distance = distance;
-         if (inputPts.length <= 2) { return this.getLineCurve(inputPts, distance) }
-         if (distance === 0.0) {
-           return OffsetCurveBuilder.copyCoordinates(inputPts)
-         }
-         var segGen = this.getSegGen(distance);
-         this.computeRingBufferCurve(inputPts, side, segGen);
-         return segGen.getCoordinates()
-       };
-       OffsetCurveBuilder.prototype.computeOffsetCurve = function computeOffsetCurve (inputPts, isRightSide, segGen) {
-         var distTol = this.simplifyTolerance(this._distance);
-         if (isRightSide) {
-           var simp2 = BufferInputLineSimplifier.simplify(inputPts, -distTol);
-           var n2 = simp2.length - 1;
-           segGen.initSideSegments(simp2[n2], simp2[n2 - 1], Position.LEFT);
-           segGen.addFirstSegment();
-           for (var i = n2 - 2; i >= 0; i--) {
-             segGen.addNextSegment(simp2[i], true);
-           }
-         } else {
-           var simp1 = BufferInputLineSimplifier.simplify(inputPts, distTol);
-           var n1 = simp1.length - 1;
-           segGen.initSideSegments(simp1[0], simp1[1], Position.LEFT);
-           segGen.addFirstSegment();
-           for (var i$1 = 2; i$1 <= n1; i$1++) {
-             segGen.addNextSegment(simp1[i$1], true);
-           }
-         }
-         segGen.addLastSegment();
-       };
-       OffsetCurveBuilder.prototype.getSegGen = function getSegGen (distance) {
-         return new OffsetSegmentGenerator(this._precisionModel, this._bufParams, distance)
-       };
-       OffsetCurveBuilder.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       OffsetCurveBuilder.prototype.getClass = function getClass () {
-         return OffsetCurveBuilder
-       };
-       OffsetCurveBuilder.copyCoordinates = function copyCoordinates (pts) {
-         var copy = new Array(pts.length).fill(null);
-         for (var i = 0; i < copy.length; i++) {
-           copy[i] = new Coordinate(pts[i]);
-         }
-         return copy
-       };
+               function rstr_hmac(key, data) {
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 var hash,
+                     i = 0,
+                     bkey = rstr2binb(key),
+                     ipad = Array(32),
+                     opad = Array(32);

 
 

-       var SubgraphDepthLocater = function SubgraphDepthLocater () {
-         this._subgraphs = null;
-         this._seg = new LineSegment();
-         this._cga = new CGAlgorithms();
-         var subgraphs = arguments[0];
-         this._subgraphs = subgraphs;
-       };
+                 if (bkey.length > 32) {
+                   bkey = binb(bkey, key.length * 8);
+                 }

 
 

-       var staticAccessors$30 = { DepthSegment: { configurable: true } };
-       SubgraphDepthLocater.prototype.findStabbedSegments = function findStabbedSegments () {
-           var this$1 = this;
+                 for (; i < 32; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }

 
 

-         if (arguments.length === 1) {
-           var stabbingRayLeftPt = arguments[0];
-           var stabbedSegments = new ArrayList();
-           for (var i = this._subgraphs.iterator(); i.hasNext();) {
-             var bsg = i.next();
-             var env = bsg.getEnvelope();
-             if (stabbingRayLeftPt.y < env.getMinY() || stabbingRayLeftPt.y > env.getMaxY()) { continue }
-             this$1.findStabbedSegments(stabbingRayLeftPt, bsg.getDirectedEdges(), stabbedSegments);
-           }
-           return stabbedSegments
-         } else if (arguments.length === 3) {
-           if (hasInterface(arguments[2], List) && (arguments[0] instanceof Coordinate && arguments[1] instanceof DirectedEdge)) {
-             var stabbingRayLeftPt$1 = arguments[0];
-             var dirEdge = arguments[1];
-             var stabbedSegments$1 = arguments[2];
-             var pts = dirEdge.getEdge().getCoordinates();
-             for (var i$1 = 0; i$1 < pts.length - 1; i$1++) {
-               this$1._seg.p0 = pts[i$1];
-               this$1._seg.p1 = pts[i$1 + 1];
-               if (this$1._seg.p0.y > this$1._seg.p1.y) { this$1._seg.reverse(); }
-               var maxx = Math.max(this$1._seg.p0.x, this$1._seg.p1.x);
-               if (maxx < stabbingRayLeftPt$1.x) { continue }
-               if (this$1._seg.isHorizontal()) { continue }
-               if (stabbingRayLeftPt$1.y < this$1._seg.p0.y || stabbingRayLeftPt$1.y > this$1._seg.p1.y) { continue }
-               if (CGAlgorithms.computeOrientation(this$1._seg.p0, this$1._seg.p1, stabbingRayLeftPt$1) === CGAlgorithms.RIGHT) { continue }
-               var depth = dirEdge.getDepth(Position.LEFT);
-               if (!this$1._seg.p0.equals(pts[i$1])) { depth = dirEdge.getDepth(Position.RIGHT); }
-               var ds = new DepthSegment(this$1._seg, depth);
-               stabbedSegments$1.add(ds);
-             }
-           } else if (hasInterface(arguments[2], List) && (arguments[0] instanceof Coordinate && hasInterface(arguments[1], List))) {
-             var stabbingRayLeftPt$2 = arguments[0];
-             var dirEdges = arguments[1];
-             var stabbedSegments$2 = arguments[2];
-             for (var i$2 = dirEdges.iterator(); i$2.hasNext();) {
-               var de = i$2.next();
-               if (!de.isForward()) { continue }
-               this$1.findStabbedSegments(stabbingRayLeftPt$2, de, stabbedSegments$2);
-             }
-           }
-         }
-       };
-       SubgraphDepthLocater.prototype.getDepth = function getDepth (p) {
-         var stabbedSegments = this.findStabbedSegments(p);
-         if (stabbedSegments.size() === 0) { return 0 }
-         var ds = Collections.min(stabbedSegments);
-         return ds._leftDepth
-       };
-       SubgraphDepthLocater.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       SubgraphDepthLocater.prototype.getClass = function getClass () {
-         return SubgraphDepthLocater
-       };
-       staticAccessors$30.DepthSegment.get = function () { return DepthSegment };
+                 hash = binb(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
+                 return binb2rstr(binb(opad.concat(hash), 1024 + 512));
+               }
+               /**
+                * Calculate the SHA-512 of an array of big-endian dwords, and a bit length
+                */
+
+
+               function binb(x, len) {
+                 var j,
+                     i,
+                     l,
+                     W = new Array(80),
+                     hash = new Array(16),
+                     //Initial hash values
+                 H = [new int64(0x6a09e667, -205731576), new int64(-1150833019, -2067093701), new int64(0x3c6ef372, -23791573), new int64(-1521486534, 0x5f1d36f1), new int64(0x510e527f, -1377402159), new int64(-1694144372, 0x2b3e6c1f), new int64(0x1f83d9ab, -79577749), new int64(0x5be0cd19, 0x137e2179)],
+                     T1 = new int64(0, 0),
+                     T2 = new int64(0, 0),
+                     a = new int64(0, 0),
+                     b = new int64(0, 0),
+                     c = new int64(0, 0),
+                     d = new int64(0, 0),
+                     e = new int64(0, 0),
+                     f = new int64(0, 0),
+                     g = new int64(0, 0),
+                     h = new int64(0, 0),
+                     //Temporary variables not specified by the document
+                 s0 = new int64(0, 0),
+                     s1 = new int64(0, 0),
+                     Ch = new int64(0, 0),
+                     Maj = new int64(0, 0),
+                     r1 = new int64(0, 0),
+                     r2 = new int64(0, 0),
+                     r3 = new int64(0, 0);
+
+                 if (sha512_k === undefined) {
+                   //SHA512 constants
+                   sha512_k = [new int64(0x428a2f98, -685199838), new int64(0x71374491, 0x23ef65cd), new int64(-1245643825, -330482897), new int64(-373957723, -2121671748), new int64(0x3956c25b, -213338824), new int64(0x59f111f1, -1241133031), new int64(-1841331548, -1357295717), new int64(-1424204075, -630357736), new int64(-670586216, -1560083902), new int64(0x12835b01, 0x45706fbe), new int64(0x243185be, 0x4ee4b28c), new int64(0x550c7dc3, -704662302), new int64(0x72be5d74, -226784913), new int64(-2132889090, 0x3b1696b1), new int64(-1680079193, 0x25c71235), new int64(-1046744716, -815192428), new int64(-459576895, -1628353838), new int64(-272742522, 0x384f25e3), new int64(0xfc19dc6, -1953704523), new int64(0x240ca1cc, 0x77ac9c65), new int64(0x2de92c6f, 0x592b0275), new int64(0x4a7484aa, 0x6ea6e483), new int64(0x5cb0a9dc, -1119749164), new int64(0x76f988da, -2096016459), new int64(-1740746414, -295247957), new int64(-1473132947, 0x2db43210), new int64(-1341970488, -1728372417), new int64(-1084653625, -1091629340), new int64(-958395405, 0x3da88fc2), new int64(-710438585, -1828018395), new int64(0x6ca6351, -536640913), new int64(0x14292967, 0xa0e6e70), new int64(0x27b70a85, 0x46d22ffc), new int64(0x2e1b2138, 0x5c26c926), new int64(0x4d2c6dfc, 0x5ac42aed), new int64(0x53380d13, -1651133473), new int64(0x650a7354, -1951439906), new int64(0x766a0abb, 0x3c77b2a8), new int64(-2117940946, 0x47edaee6), new int64(-1838011259, 0x1482353b), new int64(-1564481375, 0x4cf10364), new int64(-1474664885, -1136513023), new int64(-1035236496, -789014639), new int64(-949202525, 0x654be30), new int64(-778901479, -688958952), new int64(-694614492, 0x5565a910), new int64(-200395387, 0x5771202a), new int64(0x106aa070, 0x32bbd1b8), new int64(0x19a4c116, -1194143544), new int64(0x1e376c08, 0x5141ab53), new int64(0x2748774c, -544281703), new int64(0x34b0bcb5, -509917016), new int64(0x391c0cb3, -976659869), new int64(0x4ed8aa4a, -482243893), new int64(0x5b9cca4f, 0x7763e373), new int64(0x682e6ff3, -692930397), new int64(0x748f82ee, 0x5defb2fc), new int64(0x78a5636f, 0x43172f60), new int64(-2067236844, -1578062990), new int64(-1933114872, 0x1a6439ec), new int64(-1866530822, 0x23631e28), new int64(-1538233109, -561857047), new int64(-1090935817, -1295615723), new int64(-965641998, -479046869), new int64(-903397682, -366583396), new int64(-779700025, 0x21c0c207), new int64(-354779690, -840897762), new int64(-176337025, -294727304), new int64(0x6f067aa, 0x72176fba), new int64(0xa637dc5, -1563912026), new int64(0x113f9804, -1090974290), new int64(0x1b710b35, 0x131c471b), new int64(0x28db77f5, 0x23047d84), new int64(0x32caab7b, 0x40c72493), new int64(0x3c9ebe0a, 0x15c9bebc), new int64(0x431d67c4, -1676669620), new int64(0x4cc5d4be, -885112138), new int64(0x597f299c, -60457430), new int64(0x5fcb6fab, 0x3ad6faec), new int64(0x6c44198c, 0x4a475817)];
+                 }

 
 

-       Object.defineProperties( SubgraphDepthLocater, staticAccessors$30 );
+                 for (i = 0; i < 80; i += 1) {
+                   W[i] = new int64(0, 0);
+                 } // append padding to the source string. The format is described in the FIPS.
+
+
+                 x[len >> 5] |= 0x80 << 24 - (len & 0x1f);
+                 x[(len + 128 >> 10 << 5) + 31] = len;
+                 l = x.length;
+
+                 for (i = 0; i < l; i += 32) {
+                   //32 dwords is the block size
+                   int64copy(a, H[0]);
+                   int64copy(b, H[1]);
+                   int64copy(c, H[2]);
+                   int64copy(d, H[3]);
+                   int64copy(e, H[4]);
+                   int64copy(f, H[5]);
+                   int64copy(g, H[6]);
+                   int64copy(h, H[7]);
+
+                   for (j = 0; j < 16; j += 1) {
+                     W[j].h = x[i + 2 * j];
+                     W[j].l = x[i + 2 * j + 1];
+                   }
+
+                   for (j = 16; j < 80; j += 1) {
+                     //sigma1
+                     int64rrot(r1, W[j - 2], 19);
+                     int64revrrot(r2, W[j - 2], 29);
+                     int64shr(r3, W[j - 2], 6);
+                     s1.l = r1.l ^ r2.l ^ r3.l;
+                     s1.h = r1.h ^ r2.h ^ r3.h; //sigma0
+
+                     int64rrot(r1, W[j - 15], 1);
+                     int64rrot(r2, W[j - 15], 8);
+                     int64shr(r3, W[j - 15], 7);
+                     s0.l = r1.l ^ r2.l ^ r3.l;
+                     s0.h = r1.h ^ r2.h ^ r3.h;
+                     int64add4(W[j], s1, W[j - 7], s0, W[j - 16]);
+                   }
+
+                   for (j = 0; j < 80; j += 1) {
+                     //Ch
+                     Ch.l = e.l & f.l ^ ~e.l & g.l;
+                     Ch.h = e.h & f.h ^ ~e.h & g.h; //Sigma1
+
+                     int64rrot(r1, e, 14);
+                     int64rrot(r2, e, 18);
+                     int64revrrot(r3, e, 9);
+                     s1.l = r1.l ^ r2.l ^ r3.l;
+                     s1.h = r1.h ^ r2.h ^ r3.h; //Sigma0
+
+                     int64rrot(r1, a, 28);
+                     int64revrrot(r2, a, 2);
+                     int64revrrot(r3, a, 7);
+                     s0.l = r1.l ^ r2.l ^ r3.l;
+                     s0.h = r1.h ^ r2.h ^ r3.h; //Maj
+
+                     Maj.l = a.l & b.l ^ a.l & c.l ^ b.l & c.l;
+                     Maj.h = a.h & b.h ^ a.h & c.h ^ b.h & c.h;
+                     int64add5(T1, h, s1, Ch, sha512_k[j], W[j]);
+                     int64add(T2, s0, Maj);
+                     int64copy(h, g);
+                     int64copy(g, f);
+                     int64copy(f, e);
+                     int64add(e, d, T1);
+                     int64copy(d, c);
+                     int64copy(c, b);
+                     int64copy(b, a);
+                     int64add(a, T1, T2);
+                   }
+
+                   int64add(H[0], H[0], a);
+                   int64add(H[1], H[1], b);
+                   int64add(H[2], H[2], c);
+                   int64add(H[3], H[3], d);
+                   int64add(H[4], H[4], e);
+                   int64add(H[5], H[5], f);
+                   int64add(H[6], H[6], g);
+                   int64add(H[7], H[7], h);
+                 } //represent the hash as an array of 32-bit dwords
+
+
+                 for (i = 0; i < 8; i += 1) {
+                   hash[2 * i] = H[i].h;
+                   hash[2 * i + 1] = H[i].l;
+                 }

 
 

-       var DepthSegment = function DepthSegment () {
-         this._upwardSeg = null;
-         this._leftDepth = null;
-         var seg = arguments[0];
-         var depth = arguments[1];
-         this._upwardSeg = new LineSegment(seg);
-         this._leftDepth = depth;
-       };
-       DepthSegment.prototype.compareTo = function compareTo (obj) {
-         var other = obj;
-         if (this._upwardSeg.minX() >= other._upwardSeg.maxX()) { return 1 }
-         if (this._upwardSeg.maxX() <= other._upwardSeg.minX()) { return -1 }
-         var orientIndex = this._upwardSeg.orientationIndex(other._upwardSeg);
-         if (orientIndex !== 0) { return orientIndex }
-         orientIndex = -1 * other._upwardSeg.orientationIndex(this._upwardSeg);
-         if (orientIndex !== 0) { return orientIndex }
-         return this._upwardSeg.compareTo(other._upwardSeg)
-       };
-       DepthSegment.prototype.compareX = function compareX (seg0, seg1) {
-         var compare0 = seg0.p0.compareTo(seg1.p0);
-         if (compare0 !== 0) { return compare0 }
-         return seg0.p1.compareTo(seg1.p1)
-       };
-       DepthSegment.prototype.toString = function toString () {
-         return this._upwardSeg.toString()
-       };
-       DepthSegment.prototype.interfaces_ = function interfaces_ () {
-         return [Comparable]
-       };
-       DepthSegment.prototype.getClass = function getClass () {
-         return DepthSegment
-       };
+                 return hash;
+               } //A constructor for 64-bit numbers

 
 

-       var Triangle = function Triangle (p0, p1, p2) {
-         this.p0 = p0 || null;
-         this.p1 = p1 || null;
-         this.p2 = p2 || null;
-       };
-       Triangle.prototype.area = function area () {
-         return Triangle.area(this.p0, this.p1, this.p2)
-       };
-       Triangle.prototype.signedArea = function signedArea () {
-         return Triangle.signedArea(this.p0, this.p1, this.p2)
-       };
-       Triangle.prototype.interpolateZ = function interpolateZ (p) {
-         if (p === null) { throw new IllegalArgumentException('Supplied point is null.') }
-         return Triangle.interpolateZ(p, this.p0, this.p1, this.p2)
-       };
-       Triangle.prototype.longestSideLength = function longestSideLength () {
-         return Triangle.longestSideLength(this.p0, this.p1, this.p2)
-       };
-       Triangle.prototype.isAcute = function isAcute () {
-         return Triangle.isAcute(this.p0, this.p1, this.p2)
-       };
-       Triangle.prototype.circumcentre = function circumcentre () {
-         return Triangle.circumcentre(this.p0, this.p1, this.p2)
-       };
-       Triangle.prototype.area3D = function area3D () {
-         return Triangle.area3D(this.p0, this.p1, this.p2)
-       };
-       Triangle.prototype.centroid = function centroid () {
-         return Triangle.centroid(this.p0, this.p1, this.p2)
-       };
-       Triangle.prototype.inCentre = function inCentre () {
-         return Triangle.inCentre(this.p0, this.p1, this.p2)
-       };
-       Triangle.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Triangle.prototype.getClass = function getClass () {
-         return Triangle
-       };
-       Triangle.area = function area (a, b, c) {
-         return Math.abs(((c.x - a.x) * (b.y - a.y) - (b.x - a.x) * (c.y - a.y)) / 2)
-       };
-       Triangle.signedArea = function signedArea (a, b, c) {
-         return ((c.x - a.x) * (b.y - a.y) - (b.x - a.x) * (c.y - a.y)) / 2
-       };
-       Triangle.det = function det (m00, m01, m10, m11) {
-         return m00 * m11 - m01 * m10
-       };
-       Triangle.interpolateZ = function interpolateZ (p, v0, v1, v2) {
-         var x0 = v0.x;
-         var y0 = v0.y;
-         var a = v1.x - x0;
-         var b = v2.x - x0;
-         var c = v1.y - y0;
-         var d = v2.y - y0;
-         var det = a * d - b * c;
-         var dx = p.x - x0;
-         var dy = p.y - y0;
-         var t = (d * dx - b * dy) / det;
-         var u = (-c * dx + a * dy) / det;
-         var z = v0.z + t * (v1.z - v0.z) + u * (v2.z - v0.z);
-         return z
-       };
-       Triangle.longestSideLength = function longestSideLength (a, b, c) {
-         var lenAB = a.distance(b);
-         var lenBC = b.distance(c);
-         var lenCA = c.distance(a);
-         var maxLen = lenAB;
-         if (lenBC > maxLen) { maxLen = lenBC; }
-         if (lenCA > maxLen) { maxLen = lenCA; }
-         return maxLen
-       };
-       Triangle.isAcute = function isAcute (a, b, c) {
-         if (!Angle.isAcute(a, b, c)) { return false }
-         if (!Angle.isAcute(b, c, a)) { return false }
-         if (!Angle.isAcute(c, a, b)) { return false }
-         return true
-       };
-       Triangle.circumcentre = function circumcentre (a, b, c) {
-         var cx = c.x;
-         var cy = c.y;
-         var ax = a.x - cx;
-         var ay = a.y - cy;
-         var bx = b.x - cx;
-         var by = b.y - cy;
-         var denom = 2 * Triangle.det(ax, ay, bx, by);
-         var numx = Triangle.det(ay, ax * ax + ay * ay, by, bx * bx + by * by);
-         var numy = Triangle.det(ax, ax * ax + ay * ay, bx, bx * bx + by * by);
-         var ccx = cx - numx / denom;
-         var ccy = cy + numy / denom;
-         return new Coordinate(ccx, ccy)
-       };
-       Triangle.perpendicularBisector = function perpendicularBisector (a, b) {
-         var dx = b.x - a.x;
-         var dy = b.y - a.y;
-         var l1 = new HCoordinate(a.x + dx / 2.0, a.y + dy / 2.0, 1.0);
-         var l2 = new HCoordinate(a.x - dy + dx / 2.0, a.y + dx + dy / 2.0, 1.0);
-         return new HCoordinate(l1, l2)
-       };
-       Triangle.angleBisector = function angleBisector (a, b, c) {
-         var len0 = b.distance(a);
-         var len2 = b.distance(c);
-         var frac = len0 / (len0 + len2);
-         var dx = c.x - a.x;
-         var dy = c.y - a.y;
-         var splitPt = new Coordinate(a.x + frac * dx, a.y + frac * dy);
-         return splitPt
-       };
-       Triangle.area3D = function area3D (a, b, c) {
-         var ux = b.x - a.x;
-         var uy = b.y - a.y;
-         var uz = b.z - a.z;
-         var vx = c.x - a.x;
-         var vy = c.y - a.y;
-         var vz = c.z - a.z;
-         var crossx = uy * vz - uz * vy;
-         var crossy = uz * vx - ux * vz;
-         var crossz = ux * vy - uy * vx;
-         var absSq = crossx * crossx + crossy * crossy + crossz * crossz;
-         var area3D = Math.sqrt(absSq) / 2;
-         return area3D
-       };
-       Triangle.centroid = function centroid (a, b, c) {
-         var x = (a.x + b.x + c.x) / 3;
-         var y = (a.y + b.y + c.y) / 3;
-         return new Coordinate(x, y)
-       };
-       Triangle.inCentre = function inCentre (a, b, c) {
-         var len0 = b.distance(c);
-         var len1 = a.distance(c);
-         var len2 = a.distance(b);
-         var circum = len0 + len1 + len2;
-         var inCentreX = (len0 * a.x + len1 * b.x + len2 * c.x) / circum;
-         var inCentreY = (len0 * a.y + len1 * b.y + len2 * c.y) / circum;
-         return new Coordinate(inCentreX, inCentreY)
-       };

 
 

-       var OffsetCurveSetBuilder = function OffsetCurveSetBuilder () {
-         this._inputGeom = null;
-         this._distance = null;
-         this._curveBuilder = null;
-         this._curveList = new ArrayList();
-         var inputGeom = arguments[0];
-         var distance = arguments[1];
-         var curveBuilder = arguments[2];
-         this._inputGeom = inputGeom;
-         this._distance = distance;
-         this._curveBuilder = curveBuilder;
-       };
-       OffsetCurveSetBuilder.prototype.addPoint = function addPoint (p) {
-         if (this._distance <= 0.0) { return null }
-         var coord = p.getCoordinates();
-         var curve = this._curveBuilder.getLineCurve(coord, this._distance);
-         this.addCurve(curve, Location.EXTERIOR, Location.INTERIOR);
-       };
-       OffsetCurveSetBuilder.prototype.addPolygon = function addPolygon (p) {
-           var this$1 = this;
-
-         var offsetDistance = this._distance;
-         var offsetSide = Position.LEFT;
-         if (this._distance < 0.0) {
-           offsetDistance = -this._distance;
-           offsetSide = Position.RIGHT;
-         }
-         var shell = p.getExteriorRing();
-         var shellCoord = CoordinateArrays.removeRepeatedPoints(shell.getCoordinates());
-         if (this._distance < 0.0 && this.isErodedCompletely(shell, this._distance)) { return null }
-         if (this._distance <= 0.0 && shellCoord.length < 3) { return null }
-         this.addPolygonRing(shellCoord, offsetDistance, offsetSide, Location.EXTERIOR, Location.INTERIOR);
-         for (var i = 0; i < p.getNumInteriorRing(); i++) {
-           var hole = p.getInteriorRingN(i);
-           var holeCoord = CoordinateArrays.removeRepeatedPoints(hole.getCoordinates());
-           if (this$1._distance > 0.0 && this$1.isErodedCompletely(hole, -this$1._distance)) { continue }
-           this$1.addPolygonRing(holeCoord, offsetDistance, Position.opposite(offsetSide), Location.INTERIOR, Location.EXTERIOR);
-         }
-       };
-       OffsetCurveSetBuilder.prototype.isTriangleErodedCompletely = function isTriangleErodedCompletely (triangleCoord, bufferDistance) {
-         var tri = new Triangle(triangleCoord[0], triangleCoord[1], triangleCoord[2]);
-         var inCentre = tri.inCentre();
-         var distToCentre = CGAlgorithms.distancePointLine(inCentre, tri.p0, tri.p1);
-         return distToCentre < Math.abs(bufferDistance)
-       };
-       OffsetCurveSetBuilder.prototype.addLineString = function addLineString (line) {
-         if (this._distance <= 0.0 && !this._curveBuilder.getBufferParameters().isSingleSided()) { return null }
-         var coord = CoordinateArrays.removeRepeatedPoints(line.getCoordinates());
-         var curve = this._curveBuilder.getLineCurve(coord, this._distance);
-         this.addCurve(curve, Location.EXTERIOR, Location.INTERIOR);
-       };
-       OffsetCurveSetBuilder.prototype.addCurve = function addCurve (coord, leftLoc, rightLoc) {
-         if (coord === null || coord.length < 2) { return null }
-         var e = new NodedSegmentString(coord, new Label(0, Location.BOUNDARY, leftLoc, rightLoc));
-         this._curveList.add(e);
-       };
-       OffsetCurveSetBuilder.prototype.getCurves = function getCurves () {
-         this.add(this._inputGeom);
-         return this._curveList
-       };
-       OffsetCurveSetBuilder.prototype.addPolygonRing = function addPolygonRing (coord, offsetDistance, side, cwLeftLoc, cwRightLoc) {
-         if (offsetDistance === 0.0 && coord.length < LinearRing.MINIMUM_VALID_SIZE) { return null }
-         var leftLoc = cwLeftLoc;
-         var rightLoc = cwRightLoc;
-         if (coord.length >= LinearRing.MINIMUM_VALID_SIZE && CGAlgorithms.isCCW(coord)) {
-           leftLoc = cwRightLoc;
-           rightLoc = cwLeftLoc;
-           side = Position.opposite(side);
-         }
-         var curve = this._curveBuilder.getRingCurve(coord, side, offsetDistance);
-         this.addCurve(curve, leftLoc, rightLoc);
-       };
-       OffsetCurveSetBuilder.prototype.add = function add (g) {
-         if (g.isEmpty()) { return null }
-         if (g instanceof Polygon) { this.addPolygon(g); }
-         else if (g instanceof LineString) { this.addLineString(g); }
-         else if (g instanceof Point$1) { this.addPoint(g); }
-         else if (g instanceof MultiPoint) { this.addCollection(g); }
-         else if (g instanceof MultiLineString) { this.addCollection(g); }
-         else if (g instanceof MultiPolygon) { this.addCollection(g); }
-         else if (g instanceof GeometryCollection) { this.addCollection(g); }
-         // else throw new UnsupportedOperationException(g.getClass().getName())
-       };
-       OffsetCurveSetBuilder.prototype.isErodedCompletely = function isErodedCompletely (ring, bufferDistance) {
-         var ringCoord = ring.getCoordinates();
-         // const minDiam = 0.0
-         if (ringCoord.length < 4) { return bufferDistance < 0 }
-         if (ringCoord.length === 4) { return this.isTriangleErodedCompletely(ringCoord, bufferDistance) }
-         var env = ring.getEnvelopeInternal();
-         var envMinDimension = Math.min(env.getHeight(), env.getWidth());
-         if (bufferDistance < 0.0 && 2 * Math.abs(bufferDistance) > envMinDimension) { return true }
-         return false
-       };
-       OffsetCurveSetBuilder.prototype.addCollection = function addCollection (gc) {
-           var this$1 = this;
+               function int64(h, l) {
+                 this.h = h;
+                 this.l = l; //this.toString = int64toString;
+               } //Copies src into dst, assuming both are 64-bit numbers

 
 

-         for (var i = 0; i < gc.getNumGeometries(); i++) {
-           var g = gc.getGeometryN(i);
-           this$1.add(g);
-         }
-       };
-       OffsetCurveSetBuilder.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       OffsetCurveSetBuilder.prototype.getClass = function getClass () {
-         return OffsetCurveSetBuilder
-       };

 
 

-       var PointOnGeometryLocator = function PointOnGeometryLocator () {};
+               function int64copy(dst, src) {
+                 dst.h = src.h;
+                 dst.l = src.l;
+               } //Right-rotates a 64-bit number by shift
+               //Won't handle cases of shift>=32
+               //The function revrrot() is for that

 
 

-       PointOnGeometryLocator.prototype.locate = function locate (p) {};
-       PointOnGeometryLocator.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       PointOnGeometryLocator.prototype.getClass = function getClass () {
-         return PointOnGeometryLocator
-       };

 
 

-       var GeometryCollectionIterator = function GeometryCollectionIterator () {
-         this._parent = null;
-         this._atStart = null;
-         this._max = null;
-         this._index = null;
-         this._subcollectionIterator = null;
-         var parent = arguments[0];
-         this._parent = parent;
-         this._atStart = true;
-         this._index = 0;
-         this._max = parent.getNumGeometries();
-       };
-       GeometryCollectionIterator.prototype.next = function next () {
-         if (this._atStart) {
-           this._atStart = false;
-           if (GeometryCollectionIterator.isAtomic(this._parent)) { this._index++; }
-           return this._parent
-         }
-         if (this._subcollectionIterator !== null) {
-           if (this._subcollectionIterator.hasNext()) {
-             return this._subcollectionIterator.next()
-           } else {
-             this._subcollectionIterator = null;
-           }
-         }
-         if (this._index >= this._max) {
-           throw new NoSuchElementException()
-         }
-         var obj = this._parent.getGeometryN(this._index++);
-         if (obj instanceof GeometryCollection) {
-           this._subcollectionIterator = new GeometryCollectionIterator(obj);
-           return this._subcollectionIterator.next()
-         }
-         return obj
-       };
-       GeometryCollectionIterator.prototype.remove = function remove () {
-         throw new Error(this.getClass().getName())
-       };
-       GeometryCollectionIterator.prototype.hasNext = function hasNext () {
-         if (this._atStart) {
-           return true
-         }
-         if (this._subcollectionIterator !== null) {
-           if (this._subcollectionIterator.hasNext()) {
-             return true
-           }
-           this._subcollectionIterator = null;
-         }
-         if (this._index >= this._max) {
-           return false
-         }
-         return true
-       };
-       GeometryCollectionIterator.prototype.interfaces_ = function interfaces_ () {
-         return [Iterator$1]
-       };
-       GeometryCollectionIterator.prototype.getClass = function getClass () {
-         return GeometryCollectionIterator
-       };
-       GeometryCollectionIterator.isAtomic = function isAtomic (geom) {
-         return !(geom instanceof GeometryCollection)
-       };
+               function int64rrot(dst, x, shift) {
+                 dst.l = x.l >>> shift | x.h << 32 - shift;
+                 dst.h = x.h >>> shift | x.l << 32 - shift;
+               } //Reverses the dwords of the source and then rotates right by shift.
+               //This is equivalent to rotation by 32+shift

 
 

-       var SimplePointInAreaLocator = function SimplePointInAreaLocator () {
-         this._geom = null;
-         var geom = arguments[0];
-         this._geom = geom;
-       };
-       SimplePointInAreaLocator.prototype.locate = function locate (p) {
-         return SimplePointInAreaLocator.locate(p, this._geom)
-       };
-       SimplePointInAreaLocator.prototype.interfaces_ = function interfaces_ () {
-         return [PointOnGeometryLocator]
-       };
-       SimplePointInAreaLocator.prototype.getClass = function getClass () {
-         return SimplePointInAreaLocator
-       };
-       SimplePointInAreaLocator.isPointInRing = function isPointInRing (p, ring) {
-         if (!ring.getEnvelopeInternal().intersects(p)) { return false }
-         return CGAlgorithms.isPointInRing(p, ring.getCoordinates())
-       };
-       SimplePointInAreaLocator.containsPointInPolygon = function containsPointInPolygon (p, poly) {
-         if (poly.isEmpty()) { return false }
-         var shell = poly.getExteriorRing();
-         if (!SimplePointInAreaLocator.isPointInRing(p, shell)) { return false }
-         for (var i = 0; i < poly.getNumInteriorRing(); i++) {
-           var hole = poly.getInteriorRingN(i);
-           if (SimplePointInAreaLocator.isPointInRing(p, hole)) { return false }
-         }
-         return true
-       };
-       SimplePointInAreaLocator.containsPoint = function containsPoint (p, geom) {
-         if (geom instanceof Polygon) {
-           return SimplePointInAreaLocator.containsPointInPolygon(p, geom)
-         } else if (geom instanceof GeometryCollection) {
-           var geomi = new GeometryCollectionIterator(geom);
-           while (geomi.hasNext()) {
-             var g2 = geomi.next();
-             if (g2 !== geom) { if (SimplePointInAreaLocator.containsPoint(p, g2)) { return true } }
-           }
-         }
-         return false
-       };
-       SimplePointInAreaLocator.locate = function locate (p, geom) {
-         if (geom.isEmpty()) { return Location.EXTERIOR }
-         if (SimplePointInAreaLocator.containsPoint(p, geom)) { return Location.INTERIOR }
-         return Location.EXTERIOR
-       };

 
 

-       var EdgeEndStar = function EdgeEndStar () {
-         this._edgeMap = new TreeMap();
-         this._edgeList = null;
-         this._ptInAreaLocation = [Location.NONE, Location.NONE];
-       };
-       EdgeEndStar.prototype.getNextCW = function getNextCW (ee) {
-         this.getEdges();
-         var i = this._edgeList.indexOf(ee);
-         var iNextCW = i - 1;
-         if (i === 0) { iNextCW = this._edgeList.size() - 1; }
-         return this._edgeList.get(iNextCW)
-       };
-       EdgeEndStar.prototype.propagateSideLabels = function propagateSideLabels (geomIndex) {
-         var startLoc = Location.NONE;
-         for (var it = this.iterator(); it.hasNext();) {
-           var e = it.next();
-           var label = e.getLabel();
-           if (label.isArea(geomIndex) && label.getLocation(geomIndex, Position.LEFT) !== Location.NONE) { startLoc = label.getLocation(geomIndex, Position.LEFT); }
-         }
-         if (startLoc === Location.NONE) { return null }
-         var currLoc = startLoc;
-         for (var it$1 = this.iterator(); it$1.hasNext();) {
-           var e$1 = it$1.next();
-           var label$1 = e$1.getLabel();
-           if (label$1.getLocation(geomIndex, Position.ON) === Location.NONE) { label$1.setLocation(geomIndex, Position.ON, currLoc); }
-           if (label$1.isArea(geomIndex)) {
-             var leftLoc = label$1.getLocation(geomIndex, Position.LEFT);
-             var rightLoc = label$1.getLocation(geomIndex, Position.RIGHT);
-             if (rightLoc !== Location.NONE) {
-               if (rightLoc !== currLoc) { throw new TopologyException('side location conflict', e$1.getCoordinate()) }
-               if (leftLoc === Location.NONE) {
-                 Assert.shouldNeverReachHere('found single null side (at ' + e$1.getCoordinate() + ')');
-               }
-               currLoc = leftLoc;
-             } else {
-               Assert.isTrue(label$1.getLocation(geomIndex, Position.LEFT) === Location.NONE, 'found single null side');
-               label$1.setLocation(geomIndex, Position.RIGHT, currLoc);
-               label$1.setLocation(geomIndex, Position.LEFT, currLoc);
-             }
-           }
-         }
-       };
-       EdgeEndStar.prototype.getCoordinate = function getCoordinate () {
-         var it = this.iterator();
-         if (!it.hasNext()) { return null }
-         var e = it.next();
-         return e.getCoordinate()
-       };
-       EdgeEndStar.prototype.print = function print (out) {
-         System.out.println('EdgeEndStar:   ' + this.getCoordinate());
-         for (var it = this.iterator(); it.hasNext();) {
-           var e = it.next();
-           e.print(out);
-         }
-       };
-       EdgeEndStar.prototype.isAreaLabelsConsistent = function isAreaLabelsConsistent (geomGraph) {
-         this.computeEdgeEndLabels(geomGraph.getBoundaryNodeRule());
-         return this.checkAreaLabelsConsistent(0)
-       };
-       EdgeEndStar.prototype.checkAreaLabelsConsistent = function checkAreaLabelsConsistent (geomIndex) {
-         var edges = this.getEdges();
-         if (edges.size() <= 0) { return true }
-         var lastEdgeIndex = edges.size() - 1;
-         var startLabel = edges.get(lastEdgeIndex).getLabel();
-         var startLoc = startLabel.getLocation(geomIndex, Position.LEFT);
-         Assert.isTrue(startLoc !== Location.NONE, 'Found unlabelled area edge');
-         var currLoc = startLoc;
-         for (var it = this.iterator(); it.hasNext();) {
-           var e = it.next();
-           var label = e.getLabel();
-           Assert.isTrue(label.isArea(geomIndex), 'Found non-area edge');
-           var leftLoc = label.getLocation(geomIndex, Position.LEFT);
-           var rightLoc = label.getLocation(geomIndex, Position.RIGHT);
-           if (leftLoc === rightLoc) {
-             return false
-           }
-           if (rightLoc !== currLoc) {
-             return false
-           }
-           currLoc = leftLoc;
-         }
-         return true
-       };
-       EdgeEndStar.prototype.findIndex = function findIndex (eSearch) {
-           var this$1 = this;
+               function int64revrrot(dst, x, shift) {
+                 dst.l = x.h >>> shift | x.l << 32 - shift;
+                 dst.h = x.l >>> shift | x.h << 32 - shift;
+               } //Bitwise-shifts right a 64-bit number by shift
+               //Won't handle shift>=32, but it's never needed in SHA512

 
 

-         this.iterator();
-         for (var i = 0; i < this._edgeList.size(); i++) {
-           var e = this$1._edgeList.get(i);
-           if (e === eSearch) { return i }
-         }
-         return -1
-       };
-       EdgeEndStar.prototype.iterator = function iterator () {
-         return this.getEdges().iterator()
-       };
-       EdgeEndStar.prototype.getEdges = function getEdges () {
-         if (this._edgeList === null) {
-           this._edgeList = new ArrayList(this._edgeMap.values());
-         }
-         return this._edgeList
-       };
-       EdgeEndStar.prototype.getLocation = function getLocation (geomIndex, p, geom) {
-         if (this._ptInAreaLocation[geomIndex] === Location.NONE) {
-           this._ptInAreaLocation[geomIndex] = SimplePointInAreaLocator.locate(p, geom[geomIndex].getGeometry());
-         }
-         return this._ptInAreaLocation[geomIndex]
-       };
-       EdgeEndStar.prototype.toString = function toString () {
-         var buf = new StringBuffer();
-         buf.append('EdgeEndStar:   ' + this.getCoordinate());
-         buf.append('\n');
-         for (var it = this.iterator(); it.hasNext();) {
-           var e = it.next();
-           buf.append(e);
-           buf.append('\n');
-         }
-         return buf.toString()
-       };
-       EdgeEndStar.prototype.computeEdgeEndLabels = function computeEdgeEndLabels (boundaryNodeRule) {
-         for (var it = this.iterator(); it.hasNext();) {
-           var ee = it.next();
-           ee.computeLabel(boundaryNodeRule);
-         }
-       };
-       EdgeEndStar.prototype.computeLabelling = function computeLabelling (geomGraph) {
-           var this$1 = this;
-
-         this.computeEdgeEndLabels(geomGraph[0].getBoundaryNodeRule());
-         this.propagateSideLabels(0);
-         this.propagateSideLabels(1);
-         var hasDimensionalCollapseEdge = [false, false];
-         for (var it = this.iterator(); it.hasNext();) {
-           var e = it.next();
-           var label = e.getLabel();
-           for (var geomi = 0; geomi < 2; geomi++) {
-             if (label.isLine(geomi) && label.getLocation(geomi) === Location.BOUNDARY) { hasDimensionalCollapseEdge[geomi] = true; }
-           }
-         }
-         for (var it$1 = this.iterator(); it$1.hasNext();) {
-           var e$1 = it$1.next();
-           var label$1 = e$1.getLabel();
-           for (var geomi$1 = 0; geomi$1 < 2; geomi$1++) {
-             if (label$1.isAnyNull(geomi$1)) {
-               var loc = Location.NONE;
-               if (hasDimensionalCollapseEdge[geomi$1]) {
-                 loc = Location.EXTERIOR;
-               } else {
-                 var p = e$1.getCoordinate();
-                 loc = this$1.getLocation(geomi$1, p, geomGraph);
-               }
-               label$1.setAllLocationsIfNull(geomi$1, loc);
-             }
-           }
-         }
-       };
-       EdgeEndStar.prototype.getDegree = function getDegree () {
-         return this._edgeMap.size()
-       };
-       EdgeEndStar.prototype.insertEdgeEnd = function insertEdgeEnd (e, obj) {
-         this._edgeMap.put(e, obj);
-         this._edgeList = null;
-       };
-       EdgeEndStar.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       EdgeEndStar.prototype.getClass = function getClass () {
-         return EdgeEndStar
-       };

 
 

-       var DirectedEdgeStar = (function (EdgeEndStar$$1) {
-         function DirectedEdgeStar () {
-           EdgeEndStar$$1.call(this);
-           this._resultAreaEdgeList = null;
-           this._label = null;
-           this._SCANNING_FOR_INCOMING = 1;
-           this._LINKING_TO_OUTGOING = 2;
-         }
-
-         if ( EdgeEndStar$$1 ) { DirectedEdgeStar.__proto__ = EdgeEndStar$$1; }
-         DirectedEdgeStar.prototype = Object.create( EdgeEndStar$$1 && EdgeEndStar$$1.prototype );
-         DirectedEdgeStar.prototype.constructor = DirectedEdgeStar;
-         DirectedEdgeStar.prototype.linkResultDirectedEdges = function linkResultDirectedEdges () {
-           var this$1 = this;
-
-           this.getResultAreaEdges();
-           var firstOut = null;
-           var incoming = null;
-           var state = this._SCANNING_FOR_INCOMING;
-           for (var i = 0; i < this._resultAreaEdgeList.size(); i++) {
-             var nextOut = this$1._resultAreaEdgeList.get(i);
-             var nextIn = nextOut.getSym();
-             if (!nextOut.getLabel().isArea()) { continue }
-             if (firstOut === null && nextOut.isInResult()) { firstOut = nextOut; }
-             switch (state) {
-               case this$1._SCANNING_FOR_INCOMING:
-                 if (!nextIn.isInResult()) { continue }
-                 incoming = nextIn;
-                 state = this$1._LINKING_TO_OUTGOING;
-                 break
-               case this$1._LINKING_TO_OUTGOING:
-                 if (!nextOut.isInResult()) { continue }
-                 incoming.setNext(nextOut);
-                 state = this$1._SCANNING_FOR_INCOMING;
-                 break
-             }
-           }
-           if (state === this._LINKING_TO_OUTGOING) {
-             if (firstOut === null) { throw new TopologyException('no outgoing dirEdge found', this.getCoordinate()) }
-             Assert.isTrue(firstOut.isInResult(), 'unable to link last incoming dirEdge');
-             incoming.setNext(firstOut);
-           }
-         };
-         DirectedEdgeStar.prototype.insert = function insert (ee) {
-           var de = ee;
-           this.insertEdgeEnd(de, de);
-         };
-         DirectedEdgeStar.prototype.getRightmostEdge = function getRightmostEdge () {
-           var edges = this.getEdges();
-           var size = edges.size();
-           if (size < 1) { return null }
-           var de0 = edges.get(0);
-           if (size === 1) { return de0 }
-           var deLast = edges.get(size - 1);
-           var quad0 = de0.getQuadrant();
-           var quad1 = deLast.getQuadrant();
-           if (Quadrant.isNorthern(quad0) && Quadrant.isNorthern(quad1)) { return de0; } else if (!Quadrant.isNorthern(quad0) && !Quadrant.isNorthern(quad1)) { return deLast; } else {
-             // const nonHorizontalEdge = null
-             if (de0.getDy() !== 0) { return de0; } else if (deLast.getDy() !== 0) { return deLast }
-           }
-           Assert.shouldNeverReachHere('found two horizontal edges incident on node');
-           return null
-         };
-         DirectedEdgeStar.prototype.print = function print (out) {
-           System.out.println('DirectedEdgeStar: ' + this.getCoordinate());
-           for (var it = this.iterator(); it.hasNext();) {
-             var de = it.next();
-             out.print('out ');
-             de.print(out);
-             out.println();
-             out.print('in ');
-             de.getSym().print(out);
-             out.println();
-           }
-         };
-         DirectedEdgeStar.prototype.getResultAreaEdges = function getResultAreaEdges () {
-           var this$1 = this;
-
-           if (this._resultAreaEdgeList !== null) { return this._resultAreaEdgeList }
-           this._resultAreaEdgeList = new ArrayList();
-           for (var it = this.iterator(); it.hasNext();) {
-             var de = it.next();
-             if (de.isInResult() || de.getSym().isInResult()) { this$1._resultAreaEdgeList.add(de); }
-           }
-           return this._resultAreaEdgeList
-         };
-         DirectedEdgeStar.prototype.updateLabelling = function updateLabelling (nodeLabel) {
-           for (var it = this.iterator(); it.hasNext();) {
-             var de = it.next();
-             var label = de.getLabel();
-             label.setAllLocationsIfNull(0, nodeLabel.getLocation(0));
-             label.setAllLocationsIfNull(1, nodeLabel.getLocation(1));
-           }
-         };
-         DirectedEdgeStar.prototype.linkAllDirectedEdges = function linkAllDirectedEdges () {
-           var this$1 = this;
-
-           this.getEdges();
-           var prevOut = null;
-           var firstIn = null;
-           for (var i = this._edgeList.size() - 1; i >= 0; i--) {
-             var nextOut = this$1._edgeList.get(i);
-             var nextIn = nextOut.getSym();
-             if (firstIn === null) { firstIn = nextIn; }
-             if (prevOut !== null) { nextIn.setNext(prevOut); }
-             prevOut = nextOut;
-           }
-           firstIn.setNext(prevOut);
-         };
-         DirectedEdgeStar.prototype.computeDepths = function computeDepths () {
-           var this$1 = this;
-
-           if (arguments.length === 1) {
-             var de = arguments[0];
-             var edgeIndex = this.findIndex(de);
-             // const label = de.getLabel()
-             var startDepth = de.getDepth(Position.LEFT);
-             var targetLastDepth = de.getDepth(Position.RIGHT);
-             var nextDepth = this.computeDepths(edgeIndex + 1, this._edgeList.size(), startDepth);
-             var lastDepth = this.computeDepths(0, edgeIndex, nextDepth);
-             if (lastDepth !== targetLastDepth) { throw new TopologyException('depth mismatch at ' + de.getCoordinate()) }
-           } else if (arguments.length === 3) {
-             var startIndex = arguments[0];
-             var endIndex = arguments[1];
-             var startDepth$1 = arguments[2];
-             var currDepth = startDepth$1;
-             for (var i = startIndex; i < endIndex; i++) {
-               var nextDe = this$1._edgeList.get(i);
-               // const label = nextDe.getLabel()
-               nextDe.setEdgeDepths(Position.RIGHT, currDepth);
-               currDepth = nextDe.getDepth(Position.LEFT);
-             }
-             return currDepth
-           }
-         };
-         DirectedEdgeStar.prototype.mergeSymLabels = function mergeSymLabels () {
-           for (var it = this.iterator(); it.hasNext();) {
-             var de = it.next();
-             var label = de.getLabel();
-             label.merge(de.getSym().getLabel());
-           }
-         };
-         DirectedEdgeStar.prototype.linkMinimalDirectedEdges = function linkMinimalDirectedEdges (er) {
-           var this$1 = this;
-
-           var firstOut = null;
-           var incoming = null;
-           var state = this._SCANNING_FOR_INCOMING;
-           for (var i = this._resultAreaEdgeList.size() - 1; i >= 0; i--) {
-             var nextOut = this$1._resultAreaEdgeList.get(i);
-             var nextIn = nextOut.getSym();
-             if (firstOut === null && nextOut.getEdgeRing() === er) { firstOut = nextOut; }
-             switch (state) {
-               case this$1._SCANNING_FOR_INCOMING:
-                 if (nextIn.getEdgeRing() !== er) { continue }
-                 incoming = nextIn;
-                 state = this$1._LINKING_TO_OUTGOING;
-                 break
-               case this$1._LINKING_TO_OUTGOING:
-                 if (nextOut.getEdgeRing() !== er) { continue }
-                 incoming.setNextMin(nextOut);
-                 state = this$1._SCANNING_FOR_INCOMING;
-                 break
-             }
-           }
-           if (state === this._LINKING_TO_OUTGOING) {
-             Assert.isTrue(firstOut !== null, 'found null for first outgoing dirEdge');
-             Assert.isTrue(firstOut.getEdgeRing() === er, 'unable to link last incoming dirEdge');
-             incoming.setNextMin(firstOut);
-           }
-         };
-         DirectedEdgeStar.prototype.getOutgoingDegree = function getOutgoingDegree () {
-           if (arguments.length === 0) {
-             var degree = 0;
-             for (var it = this.iterator(); it.hasNext();) {
-               var de = it.next();
-               if (de.isInResult()) { degree++; }
-             }
-             return degree
-           } else if (arguments.length === 1) {
-             var er = arguments[0];
-             var degree$1 = 0;
-             for (var it$1 = this.iterator(); it$1.hasNext();) {
-               var de$1 = it$1.next();
-               if (de$1.getEdgeRing() === er) { degree$1++; }
-             }
-             return degree$1
-           }
-         };
-         DirectedEdgeStar.prototype.getLabel = function getLabel () {
-           return this._label
-         };
-         DirectedEdgeStar.prototype.findCoveredLineEdges = function findCoveredLineEdges () {
-           var startLoc = Location.NONE;
-           for (var it = this.iterator(); it.hasNext();) {
-             var nextOut = it.next();
-             var nextIn = nextOut.getSym();
-             if (!nextOut.isLineEdge()) {
-               if (nextOut.isInResult()) {
-                 startLoc = Location.INTERIOR;
-                 break
-               }
-               if (nextIn.isInResult()) {
-                 startLoc = Location.EXTERIOR;
-                 break
-               }
-             }
-           }
-           if (startLoc === Location.NONE) { return null }
-           var currLoc = startLoc;
-           for (var it$1 = this.iterator(); it$1.hasNext();) {
-             var nextOut$1 = it$1.next();
-             var nextIn$1 = nextOut$1.getSym();
-             if (nextOut$1.isLineEdge()) {
-               nextOut$1.getEdge().setCovered(currLoc === Location.INTERIOR);
-             } else {
-               if (nextOut$1.isInResult()) { currLoc = Location.EXTERIOR; }
-               if (nextIn$1.isInResult()) { currLoc = Location.INTERIOR; }
-             }
-           }
-         };
-         DirectedEdgeStar.prototype.computeLabelling = function computeLabelling (geom) {
-           var this$1 = this;
+               function int64shr(dst, x, shift) {
+                 dst.l = x.l >>> shift | x.h << 32 - shift;
+                 dst.h = x.h >>> shift;
+               } //Adds two 64-bit numbers
+               //Like the original implementation, does not rely on 32-bit operations

 
 

-           EdgeEndStar$$1.prototype.computeLabelling.call(this, geom);
-           this._label = new Label(Location.NONE);
-           for (var it = this.iterator(); it.hasNext();) {
-             var ee = it.next();
-             var e = ee.getEdge();
-             var eLabel = e.getLabel();
-             for (var i = 0; i < 2; i++) {
-               var eLoc = eLabel.getLocation(i);
-               if (eLoc === Location.INTERIOR || eLoc === Location.BOUNDARY) { this$1._label.setLocation(i, Location.INTERIOR); }
-             }
-           }
-         };
-         DirectedEdgeStar.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         DirectedEdgeStar.prototype.getClass = function getClass () {
-           return DirectedEdgeStar
-         };

 
 

-         return DirectedEdgeStar;
-       }(EdgeEndStar));
+               function int64add(dst, x, y) {
+                 var w0 = (x.l & 0xffff) + (y.l & 0xffff);
+                 var w1 = (x.l >>> 16) + (y.l >>> 16) + (w0 >>> 16);
+                 var w2 = (x.h & 0xffff) + (y.h & 0xffff) + (w1 >>> 16);
+                 var w3 = (x.h >>> 16) + (y.h >>> 16) + (w2 >>> 16);
+                 dst.l = w0 & 0xffff | w1 << 16;
+                 dst.h = w2 & 0xffff | w3 << 16;
+               } //Same, except with 4 addends. Works faster than adding them one by one.

 
 

-       var OverlayNodeFactory = (function (NodeFactory$$1) {
-         function OverlayNodeFactory () {
-           NodeFactory$$1.apply(this, arguments);
-         }

 
 

-         if ( NodeFactory$$1 ) { OverlayNodeFactory.__proto__ = NodeFactory$$1; }
-         OverlayNodeFactory.prototype = Object.create( NodeFactory$$1 && NodeFactory$$1.prototype );
-         OverlayNodeFactory.prototype.constructor = OverlayNodeFactory;
+               function int64add4(dst, a, b, c, d) {
+                 var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff);
+                 var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (w0 >>> 16);
+                 var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (w1 >>> 16);
+                 var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (w2 >>> 16);
+                 dst.l = w0 & 0xffff | w1 << 16;
+                 dst.h = w2 & 0xffff | w3 << 16;
+               } //Same, except with 5 addends

 
 

-         OverlayNodeFactory.prototype.createNode = function createNode (coord) {
-           return new Node$1(coord, new DirectedEdgeStar())
-         };
-         OverlayNodeFactory.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         OverlayNodeFactory.prototype.getClass = function getClass () {
-           return OverlayNodeFactory
-         };

 
 

-         return OverlayNodeFactory;
-       }(NodeFactory));
+               function int64add5(dst, a, b, c, d, e) {
+                 var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff) + (e.l & 0xffff),
+                     w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (e.l >>> 16) + (w0 >>> 16),
+                     w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (e.h & 0xffff) + (w1 >>> 16),
+                     w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (e.h >>> 16) + (w2 >>> 16);
+                 dst.l = w0 & 0xffff | w1 << 16;
+                 dst.h = w2 & 0xffff | w3 << 16;
+               }
+             },

 
 

-       var OrientedCoordinateArray = function OrientedCoordinateArray () {
-         this._pts = null;
-         this._orientation = null;
-         var pts = arguments[0];
-         this._pts = pts;
-         this._orientation = OrientedCoordinateArray.orientation(pts);
-       };
-       OrientedCoordinateArray.prototype.compareTo = function compareTo (o1) {
-         var oca = o1;
-         var comp = OrientedCoordinateArray.compareOriented(this._pts, this._orientation, oca._pts, oca._orientation);
-         return comp
-       };
-       OrientedCoordinateArray.prototype.interfaces_ = function interfaces_ () {
-         return [Comparable]
-       };
-       OrientedCoordinateArray.prototype.getClass = function getClass () {
-         return OrientedCoordinateArray
-       };
-       OrientedCoordinateArray.orientation = function orientation (pts) {
-         return CoordinateArrays.increasingDirection(pts) === 1
-       };
-       OrientedCoordinateArray.compareOriented = function compareOriented (pts1, orientation1, pts2, orientation2) {
-         var dir1 = orientation1 ? 1 : -1;
-         var dir2 = orientation2 ? 1 : -1;
-         var limit1 = orientation1 ? pts1.length : -1;
-         var limit2 = orientation2 ? pts2.length : -1;
-         var i1 = orientation1 ? 0 : pts1.length - 1;
-         var i2 = orientation2 ? 0 : pts2.length - 1;
-         // const comp = 0
-         while (true) {
-           var compPt = pts1[i1].compareTo(pts2[i2]);
-           if (compPt !== 0) { return compPt }
-           i1 += dir1;
-           i2 += dir2;
-           var done1 = i1 === limit1;
-           var done2 = i2 === limit2;
-           if (done1 && !done2) { return -1 }
-           if (!done1 && done2) { return 1 }
-           if (done1 && done2) { return 0 }
-         }
-       };
+             /**
+              * @class Hashes.RMD160
+              * @constructor
+              * @param {Object} [config]
+              *
+              * A JavaScript implementation of the RIPEMD-160 Algorithm
+              * Version 2.2 Copyright Jeremy Lin, Paul Johnston 2000 - 2009.
+              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+              * See http://pajhome.org.uk/crypt/md5 for details.
+              * Also http://www.ocf.berkeley.edu/~jjlin/jsotp/
+              */
+             RMD160: function RMD160(options) {
+               /**
+                * Private properties configuration variables. You may need to tweak these to be compatible with
+                * the server-side, but the defaults work in most cases.
+                * @see this.setUpperCase() method
+                * @see this.setPad() method
+                */
+               options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
+
+               var /* hexadecimal output case format. false - lowercase; true - uppercase  */
+               b64pad = options && typeof options.pad === 'string' ? options.pa : '=',

 
 

-       var EdgeList = function EdgeList () {
-         this._edges = new ArrayList();
-         this._ocaMap = new TreeMap();
-       };
-       EdgeList.prototype.print = function print (out) {
-           var this$1 = this;
-
-         out.print('MULTILINESTRING ( ');
-         for (var j = 0; j < this._edges.size(); j++) {
-           var e = this$1._edges.get(j);
-           if (j > 0) { out.print(','); }
-           out.print('(');
-           var pts = e.getCoordinates();
-           for (var i = 0; i < pts.length; i++) {
-             if (i > 0) { out.print(','); }
-             out.print(pts[i].x + ' ' + pts[i].y);
-           }
-           out.println(')');
-         }
-         out.print(')  ');
-       };
-       EdgeList.prototype.addAll = function addAll (edgeColl) {
-           var this$1 = this;
+               /* base-64 pad character. Default '=' for strict RFC compliance   */
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,

 
 

-         for (var i = edgeColl.iterator(); i.hasNext();) {
-           this$1.add(i.next());
-         }
-       };
-       EdgeList.prototype.findEdgeIndex = function findEdgeIndex (e) {
-           var this$1 = this;
+               /* enable/disable utf8 encoding */
+               rmd160_r1 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8, 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12, 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2, 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13],
+                   rmd160_r2 = [5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12, 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2, 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13, 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14, 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11],
+                   rmd160_s1 = [11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8, 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12, 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5, 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12, 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6],
+                   rmd160_s2 = [8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6, 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11, 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5, 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8, 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11];
+               /* privileged (public) methods */
+
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s));
+               };

 
 

-         for (var i = 0; i < this._edges.size(); i++) {
-           if (this$1._edges.get(i).equals(e)) { return i }
-         }
-         return -1
-       };
-       EdgeList.prototype.iterator = function iterator () {
-         return this._edges.iterator()
-       };
-       EdgeList.prototype.getEdges = function getEdges () {
-         return this._edges
-       };
-       EdgeList.prototype.get = function get (i) {
-         return this._edges.get(i)
-       };
-       EdgeList.prototype.findEqualEdge = function findEqualEdge (e) {
-         var oca = new OrientedCoordinateArray(e.getCoordinates());
-         var matchEdge = this._ocaMap.get(oca);
-         return matchEdge
-       };
-       EdgeList.prototype.add = function add (e) {
-         this._edges.add(e);
-         var oca = new OrientedCoordinateArray(e.getCoordinates());
-         this._ocaMap.put(oca, e);
-       };
-       EdgeList.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       EdgeList.prototype.getClass = function getClass () {
-         return EdgeList
-       };
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };

 
 

-       var SegmentIntersector = function SegmentIntersector () {};
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };

 
 

-       SegmentIntersector.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {};
-       SegmentIntersector.prototype.isDone = function isDone () {};
-       SegmentIntersector.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       SegmentIntersector.prototype.getClass = function getClass () {
-         return SegmentIntersector
-       };
+               this.raw = function (s) {
+                 return rstr(s);
+               };

 
 

-       var IntersectionAdder = function IntersectionAdder () {
-         this._hasIntersection = false;
-         this._hasProper = false;
-         this._hasProperInterior = false;
-         this._hasInterior = false;
-         this._properIntersectionPoint = null;
-         this._li = null;
-         this._isSelfIntersection = null;
-         this.numIntersections = 0;
-         this.numInteriorIntersections = 0;
-         this.numProperIntersections = 0;
-         this.numTests = 0;
-         var li = arguments[0];
-         this._li = li;
-       };
-       IntersectionAdder.prototype.isTrivialIntersection = function isTrivialIntersection (e0, segIndex0, e1, segIndex1) {
-         if (e0 === e1) {
-           if (this._li.getIntersectionNum() === 1) {
-             if (IntersectionAdder.isAdjacentSegments(segIndex0, segIndex1)) { return true }
-             if (e0.isClosed()) {
-               var maxSegIndex = e0.size() - 1;
-               if ((segIndex0 === 0 && segIndex1 === maxSegIndex) ||
-                   (segIndex1 === 0 && segIndex0 === maxSegIndex)) {
-                 return true
-               }
-             }
-           }
-         }
-         return false
-       };
-       IntersectionAdder.prototype.getProperIntersectionPoint = function getProperIntersectionPoint () {
-         return this._properIntersectionPoint
-       };
-       IntersectionAdder.prototype.hasProperInteriorIntersection = function hasProperInteriorIntersection () {
-         return this._hasProperInterior
-       };
-       IntersectionAdder.prototype.getLineIntersector = function getLineIntersector () {
-         return this._li
-       };
-       IntersectionAdder.prototype.hasProperIntersection = function hasProperIntersection () {
-         return this._hasProper
-       };
-       IntersectionAdder.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {
-         if (e0 === e1 && segIndex0 === segIndex1) { return null }
-         this.numTests++;
-         var p00 = e0.getCoordinates()[segIndex0];
-         var p01 = e0.getCoordinates()[segIndex0 + 1];
-         var p10 = e1.getCoordinates()[segIndex1];
-         var p11 = e1.getCoordinates()[segIndex1 + 1];
-         this._li.computeIntersection(p00, p01, p10, p11);
-         if (this._li.hasIntersection()) {
-           this.numIntersections++;
-           if (this._li.isInteriorIntersection()) {
-             this.numInteriorIntersections++;
-             this._hasInterior = true;
-           }
-           if (!this.isTrivialIntersection(e0, segIndex0, e1, segIndex1)) {
-             this._hasIntersection = true;
-             e0.addIntersections(this._li, segIndex0, 0);
-             e1.addIntersections(this._li, segIndex1, 1);
-             if (this._li.isProper()) {
-               this.numProperIntersections++;
-               this._hasProper = true;
-               this._hasProperInterior = true;
-             }
-           }
-         }
-       };
-       IntersectionAdder.prototype.hasIntersection = function hasIntersection () {
-         return this._hasIntersection
-       };
-       IntersectionAdder.prototype.isDone = function isDone () {
-         return false
-       };
-       IntersectionAdder.prototype.hasInteriorIntersection = function hasInteriorIntersection () {
-         return this._hasInterior
-       };
-       IntersectionAdder.prototype.interfaces_ = function interfaces_ () {
-         return [SegmentIntersector]
-       };
-       IntersectionAdder.prototype.getClass = function getClass () {
-         return IntersectionAdder
-       };
-       IntersectionAdder.isAdjacentSegments = function isAdjacentSegments (i1, i2) {
-         return Math.abs(i1 - i2) === 1
-       };
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };

 
 

-       var EdgeIntersection = function EdgeIntersection () {
-         this.coord = null;
-         this.segmentIndex = null;
-         this.dist = null;
-         var coord = arguments[0];
-         var segmentIndex = arguments[1];
-         var dist = arguments[2];
-         this.coord = new Coordinate(coord);
-         this.segmentIndex = segmentIndex;
-         this.dist = dist;
-       };
-       EdgeIntersection.prototype.getSegmentIndex = function getSegmentIndex () {
-         return this.segmentIndex
-       };
-       EdgeIntersection.prototype.getCoordinate = function getCoordinate () {
-         return this.coord
-       };
-       EdgeIntersection.prototype.print = function print (out) {
-         out.print(this.coord);
-         out.print(' seg # = ' + this.segmentIndex);
-         out.println(' dist = ' + this.dist);
-       };
-       EdgeIntersection.prototype.compareTo = function compareTo (obj) {
-         var other = obj;
-         return this.compare(other.segmentIndex, other.dist)
-       };
-       EdgeIntersection.prototype.isEndPoint = function isEndPoint (maxSegmentIndex) {
-         if (this.segmentIndex === 0 && this.dist === 0.0) { return true }
-         if (this.segmentIndex === maxSegmentIndex) { return true }
-         return false
-       };
-       EdgeIntersection.prototype.toString = function toString () {
-         return this.coord + ' seg # = ' + this.segmentIndex + ' dist = ' + this.dist
-       };
-       EdgeIntersection.prototype.getDistance = function getDistance () {
-         return this.dist
-       };
-       EdgeIntersection.prototype.compare = function compare (segmentIndex, dist) {
-         if (this.segmentIndex < segmentIndex) { return -1 }
-         if (this.segmentIndex > segmentIndex) { return 1 }
-         if (this.dist < dist) { return -1 }
-         if (this.dist > dist) { return 1 }
-         return 0
-       };
-       EdgeIntersection.prototype.interfaces_ = function interfaces_ () {
-         return [Comparable]
-       };
-       EdgeIntersection.prototype.getClass = function getClass () {
-         return EdgeIntersection
-       };
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };

 
 

-       var EdgeIntersectionList = function EdgeIntersectionList () {
-         this._nodeMap = new TreeMap();
-         this.edge = null;
-         var edge = arguments[0];
-         this.edge = edge;
-       };
-       EdgeIntersectionList.prototype.print = function print (out) {
-         out.println('Intersections:');
-         for (var it = this.iterator(); it.hasNext();) {
-           var ei = it.next();
-           ei.print(out);
-         }
-       };
-       EdgeIntersectionList.prototype.iterator = function iterator () {
-         return this._nodeMap.values().iterator()
-       };
-       EdgeIntersectionList.prototype.addSplitEdges = function addSplitEdges (edgeList) {
-           var this$1 = this;
-
-         this.addEndpoints();
-         var it = this.iterator();
-         var eiPrev = it.next();
-         while (it.hasNext()) {
-           var ei = it.next();
-           var newEdge = this$1.createSplitEdge(eiPrev, ei);
-           edgeList.add(newEdge);
-           eiPrev = ei;
-         }
-       };
-       EdgeIntersectionList.prototype.addEndpoints = function addEndpoints () {
-         var maxSegIndex = this.edge.pts.length - 1;
-         this.add(this.edge.pts[0], 0, 0.0);
-         this.add(this.edge.pts[maxSegIndex], maxSegIndex, 0.0);
-       };
-       EdgeIntersectionList.prototype.createSplitEdge = function createSplitEdge (ei0, ei1) {
-           var this$1 = this;
-
-         var npts = ei1.segmentIndex - ei0.segmentIndex + 2;
-         var lastSegStartPt = this.edge.pts[ei1.segmentIndex];
-         var useIntPt1 = ei1.dist > 0.0 || !ei1.coord.equals2D(lastSegStartPt);
-         if (!useIntPt1) {
-           npts--;
-         }
-         var pts = new Array(npts).fill(null);
-         var ipt = 0;
-         pts[ipt++] = new Coordinate(ei0.coord);
-         for (var i = ei0.segmentIndex + 1; i <= ei1.segmentIndex; i++) {
-           pts[ipt++] = this$1.edge.pts[i];
-         }
-         if (useIntPt1) { pts[ipt] = ei1.coord; }
-         return new Edge(pts, new Label(this.edge._label))
-       };
-       EdgeIntersectionList.prototype.add = function add (intPt, segmentIndex, dist) {
-         var eiNew = new EdgeIntersection(intPt, segmentIndex, dist);
-         var ei = this._nodeMap.get(eiNew);
-         if (ei !== null) {
-           return ei
-         }
-         this._nodeMap.put(eiNew, eiNew);
-         return eiNew
-       };
-       EdgeIntersectionList.prototype.isIntersection = function isIntersection (pt) {
-         for (var it = this.iterator(); it.hasNext();) {
-           var ei = it.next();
-           if (ei.coord.equals(pt)) { return true }
-         }
-         return false
-       };
-       EdgeIntersectionList.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       EdgeIntersectionList.prototype.getClass = function getClass () {
-         return EdgeIntersectionList
-       };
+               this.any_hmac = function (k, d, e) {
+                 return rstr2any(rstr_hmac(k, d), e);
+               };
+               /**
+                * Perform a simple self-test to see if the VM is working
+                * @return {String} Hexadecimal hash sample
+                * @public
+                */

 
 

-       var MonotoneChainIndexer = function MonotoneChainIndexer () {};

 
 

-       MonotoneChainIndexer.prototype.getChainStartIndices = function getChainStartIndices (pts) {
-           var this$1 = this;
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * @description Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */

 
 

-         var start = 0;
-         var startIndexList = new ArrayList();
-         startIndexList.add(new Integer(start));
-         do {
-           var last = this$1.findChainEnd(pts, start);
-           startIndexList.add(new Integer(last));
-           start = last;
-         } while (start < pts.length - 1)
-         var startIndex = MonotoneChainIndexer.toIntArray(startIndexList);
-         return startIndex
-       };
-       MonotoneChainIndexer.prototype.findChainEnd = function findChainEnd (pts, start) {
-         var chainQuad = Quadrant.quadrant(pts[start], pts[start + 1]);
-         var last = start + 1;
-         while (last < pts.length) {
-           var quad = Quadrant.quadrant(pts[last - 1], pts[last]);
-           if (quad !== chainQuad) { break }
-           last++;
-         }
-         return last - 1
-       };
-       MonotoneChainIndexer.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       MonotoneChainIndexer.prototype.getClass = function getClass () {
-         return MonotoneChainIndexer
-       };
-       MonotoneChainIndexer.toIntArray = function toIntArray (list) {
-         var array = new Array(list.size()).fill(null);
-         for (var i = 0; i < array.length; i++) {
-           array[i] = list.get(i).intValue();
-         }
-         return array
-       };

 
 

-       var MonotoneChainEdge = function MonotoneChainEdge () {
-         this.e = null;
-         this.pts = null;
-         this.startIndex = null;
-         this.env1 = new Envelope();
-         this.env2 = new Envelope();
-         var e = arguments[0];
-         this.e = e;
-         this.pts = e.getCoordinates();
-         var mcb = new MonotoneChainIndexer();
-         this.startIndex = mcb.getChainStartIndices(this.pts);
-       };
-       MonotoneChainEdge.prototype.getCoordinates = function getCoordinates () {
-         return this.pts
-       };
-       MonotoneChainEdge.prototype.getMaxX = function getMaxX (chainIndex) {
-         var x1 = this.pts[this.startIndex[chainIndex]].x;
-         var x2 = this.pts[this.startIndex[chainIndex + 1]].x;
-         return x1 > x2 ? x1 : x2
-       };
-       MonotoneChainEdge.prototype.getMinX = function getMinX (chainIndex) {
-         var x1 = this.pts[this.startIndex[chainIndex]].x;
-         var x2 = this.pts[this.startIndex[chainIndex + 1]].x;
-         return x1 < x2 ? x1 : x2
-       };
-       MonotoneChainEdge.prototype.computeIntersectsForChain = function computeIntersectsForChain () {
-         if (arguments.length === 4) {
-           var chainIndex0 = arguments[0];
-           var mce = arguments[1];
-           var chainIndex1 = arguments[2];
-           var si = arguments[3];
-           this.computeIntersectsForChain(this.startIndex[chainIndex0], this.startIndex[chainIndex0 + 1], mce, mce.startIndex[chainIndex1], mce.startIndex[chainIndex1 + 1], si);
-         } else if (arguments.length === 6) {
-           var start0 = arguments[0];
-           var end0 = arguments[1];
-           var mce$1 = arguments[2];
-           var start1 = arguments[3];
-           var end1 = arguments[4];
-           var ei = arguments[5];
-           var p00 = this.pts[start0];
-           var p01 = this.pts[end0];
-           var p10 = mce$1.pts[start1];
-           var p11 = mce$1.pts[end1];
-           if (end0 - start0 === 1 && end1 - start1 === 1) {
-             ei.addIntersections(this.e, start0, mce$1.e, start1);
-             return null
-           }
-           this.env1.init(p00, p01);
-           this.env2.init(p10, p11);
-           if (!this.env1.intersects(this.env2)) { return null }
-           var mid0 = Math.trunc((start0 + end0) / 2);
-           var mid1 = Math.trunc((start1 + end1) / 2);
-           if (start0 < mid0) {
-             if (start1 < mid1) { this.computeIntersectsForChain(start0, mid0, mce$1, start1, mid1, ei); }
-             if (mid1 < end1) { this.computeIntersectsForChain(start0, mid0, mce$1, mid1, end1, ei); }
-           }
-           if (mid0 < end0) {
-             if (start1 < mid1) { this.computeIntersectsForChain(mid0, end0, mce$1, start1, mid1, ei); }
-             if (mid1 < end1) { this.computeIntersectsForChain(mid0, end0, mce$1, mid1, end1, ei); }
-           }
-         }
-       };
-       MonotoneChainEdge.prototype.getStartIndexes = function getStartIndexes () {
-         return this.startIndex
-       };
-       MonotoneChainEdge.prototype.computeIntersects = function computeIntersects (mce, si) {
-           var this$1 = this;
+               this.setUpperCase = function (a) {

 
 

-         for (var i = 0; i < this.startIndex.length - 1; i++) {
-           for (var j = 0; j < mce.startIndex.length - 1; j++) {
-             this$1.computeIntersectsForChain(i, mce, j, si);
-           }
-         }
-       };
-       MonotoneChainEdge.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       MonotoneChainEdge.prototype.getClass = function getClass () {
-         return MonotoneChainEdge
-       };
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */

 
 

-       var Depth = function Depth () {
-         var this$1 = this;

 
 

-         this._depth = Array(2).fill().map(function () { return Array(3); });
-         for (var i = 0; i < 2; i++) {
-           for (var j = 0; j < 3; j++) {
-             this$1._depth[i][j] = Depth.NULL_VALUE;
-           }
-         }
-       };
+               this.setPad = function (a) {
+                 if (typeof a !== 'undefined') {
+                   b64pad = a;
+                 }

 
 

-       var staticAccessors$31 = { NULL_VALUE: { configurable: true } };
-       Depth.prototype.getDepth = function getDepth (geomIndex, posIndex) {
-         return this._depth[geomIndex][posIndex]
-       };
-       Depth.prototype.setDepth = function setDepth (geomIndex, posIndex, depthValue) {
-         this._depth[geomIndex][posIndex] = depthValue;
-       };
-       Depth.prototype.isNull = function isNull () {
-           var this$1 = this;
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */

 
 

-         if (arguments.length === 0) {
-           for (var i = 0; i < 2; i++) {
-             for (var j = 0; j < 3; j++) {
-               if (this$1._depth[i][j] !== Depth.NULL_VALUE) { return false }
-             }
-           }
-           return true
-         } else if (arguments.length === 1) {
-           var geomIndex = arguments[0];
-           return this._depth[geomIndex][1] === Depth.NULL_VALUE
-         } else if (arguments.length === 2) {
-           var geomIndex$1 = arguments[0];
-           var posIndex = arguments[1];
-           return this._depth[geomIndex$1][posIndex] === Depth.NULL_VALUE
-         }
-       };
-       Depth.prototype.normalize = function normalize () {
-           var this$1 = this;

 
 

-         for (var i = 0; i < 2; i++) {
-           if (!this$1.isNull(i)) {
-             var minDepth = this$1._depth[i][1];
-             if (this$1._depth[i][2] < minDepth) { minDepth = this$1._depth[i][2]; }
-             if (minDepth < 0) { minDepth = 0; }
-             for (var j = 1; j < 3; j++) {
-               var newValue = 0;
-               if (this$1._depth[i][j] > minDepth) { newValue = 1; }
-               this$1._depth[i][j] = newValue;
-             }
-           }
-         }
-       };
-       Depth.prototype.getDelta = function getDelta (geomIndex) {
-         return this._depth[geomIndex][Position.RIGHT] - this._depth[geomIndex][Position.LEFT]
-       };
-       Depth.prototype.getLocation = function getLocation (geomIndex, posIndex) {
-         if (this._depth[geomIndex][posIndex] <= 0) { return Location.EXTERIOR }
-         return Location.INTERIOR
-       };
-       Depth.prototype.toString = function toString () {
-         return 'A: ' + this._depth[0][1] + ',' + this._depth[0][2] + ' B: ' + this._depth[1][1] + ',' + this._depth[1][2]
-       };
-       Depth.prototype.add = function add () {
-           var this$1 = this;
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }

 
 

-         if (arguments.length === 1) {
-           var lbl = arguments[0];
-           for (var i = 0; i < 2; i++) {
-             for (var j = 1; j < 3; j++) {
-               var loc = lbl.getLocation(i, j);
-               if (loc === Location.EXTERIOR || loc === Location.INTERIOR) {
-                 if (this$1.isNull(i, j)) {
-                   this$1._depth[i][j] = Depth.depthAtLocation(loc);
-                 } else { this$1._depth[i][j] += Depth.depthAtLocation(loc); }
-               }
-             }
-           }
-         } else if (arguments.length === 3) {
-           var geomIndex = arguments[0];
-           var posIndex = arguments[1];
-           var location = arguments[2];
-           if (location === Location.INTERIOR) { this._depth[geomIndex][posIndex]++; }
-         }
-       };
-       Depth.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       Depth.prototype.getClass = function getClass () {
-         return Depth
-       };
-       Depth.depthAtLocation = function depthAtLocation (location) {
-         if (location === Location.EXTERIOR) { return 0 }
-         if (location === Location.INTERIOR) { return 1 }
-         return Depth.NULL_VALUE
-       };
-       staticAccessors$31.NULL_VALUE.get = function () { return -1 };
-
-       Object.defineProperties( Depth, staticAccessors$31 );
-
-       var Edge = (function (GraphComponent$$1) {
-         function Edge () {
-           GraphComponent$$1.call(this);
-           this.pts = null;
-           this._env = null;
-           this.eiList = new EdgeIntersectionList(this);
-           this._name = null;
-           this._mce = null;
-           this._isIsolated = true;
-           this._depth = new Depth();
-           this._depthDelta = 0;
-           if (arguments.length === 1) {
-             var pts = arguments[0];
-             Edge.call(this, pts, null);
-           } else if (arguments.length === 2) {
-             var pts$1 = arguments[0];
-             var label = arguments[1];
-             this.pts = pts$1;
-             this._label = label;
-           }
-         }
+                 return this;
+               };
+               /* private methods */

 
 

-         if ( GraphComponent$$1 ) { Edge.__proto__ = GraphComponent$$1; }
-         Edge.prototype = Object.create( GraphComponent$$1 && GraphComponent$$1.prototype );
-         Edge.prototype.constructor = Edge;
-         Edge.prototype.getDepth = function getDepth () {
-           return this._depth
-         };
-         Edge.prototype.getCollapsedEdge = function getCollapsedEdge () {
-           var newPts = new Array(2).fill(null);
-           newPts[0] = this.pts[0];
-           newPts[1] = this.pts[1];
-           var newe = new Edge(newPts, Label.toLineLabel(this._label));
-           return newe
-         };
-         Edge.prototype.isIsolated = function isIsolated () {
-           return this._isIsolated
-         };
-         Edge.prototype.getCoordinates = function getCoordinates () {
-           return this.pts
-         };
-         Edge.prototype.setIsolated = function setIsolated (isIsolated) {
-           this._isIsolated = isIsolated;
-         };
-         Edge.prototype.setName = function setName (name) {
-           this._name = name;
-         };
-         Edge.prototype.equals = function equals (o) {
-           var this$1 = this;
+               /**
+                * Calculate the rmd160 of a raw string
+                */

 
 

-           if (!(o instanceof Edge)) { return false }
-           var e = o;
-           if (this.pts.length !== e.pts.length) { return false }
-           var isEqualForward = true;
-           var isEqualReverse = true;
-           var iRev = this.pts.length;
-           for (var i = 0; i < this.pts.length; i++) {
-             if (!this$1.pts[i].equals2D(e.pts[i])) {
-               isEqualForward = false;
-             }
-             if (!this$1.pts[i].equals2D(e.pts[--iRev])) {
-               isEqualReverse = false;
-             }
-             if (!isEqualForward && !isEqualReverse) { return false }
-           }
-           return true
-         };
-         Edge.prototype.getCoordinate = function getCoordinate () {
-           if (arguments.length === 0) {
-             if (this.pts.length > 0) { return this.pts[0] }
-             return null
-           } else if (arguments.length === 1) {
-             var i = arguments[0];
-             return this.pts[i]
-           }
-         };
-         Edge.prototype.print = function print (out) {
-           var this$1 = this;

 
 

-           out.print('edge ' + this._name + ': ');
-           out.print('LINESTRING (');
-           for (var i = 0; i < this.pts.length; i++) {
-             if (i > 0) { out.print(','); }
-             out.print(this$1.pts[i].x + ' ' + this$1.pts[i].y);
-           }
-           out.print(')  ' + this._label + ' ' + this._depthDelta);
-         };
-         Edge.prototype.computeIM = function computeIM (im) {
-           Edge.updateIM(this._label, im);
-         };
-         Edge.prototype.isCollapsed = function isCollapsed () {
-           if (!this._label.isArea()) { return false }
-           if (this.pts.length !== 3) { return false }
-           if (this.pts[0].equals(this.pts[2])) { return true }
-           return false
-         };
-         Edge.prototype.isClosed = function isClosed () {
-           return this.pts[0].equals(this.pts[this.pts.length - 1])
-         };
-         Edge.prototype.getMaximumSegmentIndex = function getMaximumSegmentIndex () {
-           return this.pts.length - 1
-         };
-         Edge.prototype.getDepthDelta = function getDepthDelta () {
-           return this._depthDelta
-         };
-         Edge.prototype.getNumPoints = function getNumPoints () {
-           return this.pts.length
-         };
-         Edge.prototype.printReverse = function printReverse (out) {
-           var this$1 = this;
+               function rstr(s) {
+                 s = utf8 ? utf8Encode(s) : s;
+                 return binl2rstr(binl(rstr2binl(s), s.length * 8));
+               }
+               /**
+                * Calculate the HMAC-rmd160 of a key and some data (raw strings)
+                */

 
 

-           out.print('edge ' + this._name + ': ');
-           for (var i = this.pts.length - 1; i >= 0; i--) {
-             out.print(this$1.pts[i] + ' ');
-           }
-           out.println('');
-         };
-         Edge.prototype.getMonotoneChainEdge = function getMonotoneChainEdge () {
-           if (this._mce === null) { this._mce = new MonotoneChainEdge(this); }
-           return this._mce
-         };
-         Edge.prototype.getEnvelope = function getEnvelope () {
-           var this$1 = this;

 
 

-           if (this._env === null) {
-             this._env = new Envelope();
-             for (var i = 0; i < this.pts.length; i++) {
-               this$1._env.expandToInclude(this$1.pts[i]);
-             }
-           }
-           return this._env
-         };
-         Edge.prototype.addIntersection = function addIntersection (li, segmentIndex, geomIndex, intIndex) {
-           var intPt = new Coordinate(li.getIntersection(intIndex));
-           var normalizedSegmentIndex = segmentIndex;
-           var dist = li.getEdgeDistance(geomIndex, intIndex);
-           var nextSegIndex = normalizedSegmentIndex + 1;
-           if (nextSegIndex < this.pts.length) {
-             var nextPt = this.pts[nextSegIndex];
-             if (intPt.equals2D(nextPt)) {
-               normalizedSegmentIndex = nextSegIndex;
-               dist = 0.0;
-             }
-           }
-           this.eiList.add(intPt, normalizedSegmentIndex, dist);
-         };
-         Edge.prototype.toString = function toString () {
-           var this$1 = this;
+               function rstr_hmac(key, data) {
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 var i,
+                     hash,
+                     bkey = rstr2binl(key),
+                     ipad = Array(16),
+                     opad = Array(16);

 
 

-           var buf = new StringBuffer();
-           buf.append('edge ' + this._name + ': ');
-           buf.append('LINESTRING (');
-           for (var i = 0; i < this.pts.length; i++) {
-             if (i > 0) { buf.append(','); }
-             buf.append(this$1.pts[i].x + ' ' + this$1.pts[i].y);
-           }
-           buf.append(')  ' + this._label + ' ' + this._depthDelta);
-           return buf.toString()
-         };
-         Edge.prototype.isPointwiseEqual = function isPointwiseEqual (e) {
-           var this$1 = this;
+                 if (bkey.length > 16) {
+                   bkey = binl(bkey, key.length * 8);
+                 }

 
 

-           if (this.pts.length !== e.pts.length) { return false }
-           for (var i = 0; i < this.pts.length; i++) {
-             if (!this$1.pts[i].equals2D(e.pts[i])) {
-               return false
-             }
-           }
-           return true
-         };
-         Edge.prototype.setDepthDelta = function setDepthDelta (depthDelta) {
-           this._depthDelta = depthDelta;
-         };
-         Edge.prototype.getEdgeIntersectionList = function getEdgeIntersectionList () {
-           return this.eiList
-         };
-         Edge.prototype.addIntersections = function addIntersections (li, segmentIndex, geomIndex) {
-           var this$1 = this;
+                 for (i = 0; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }

 
 

-           for (var i = 0; i < li.getIntersectionNum(); i++) {
-             this$1.addIntersection(li, segmentIndex, geomIndex, i);
-           }
-         };
-         Edge.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         Edge.prototype.getClass = function getClass () {
-           return Edge
-         };
-         Edge.updateIM = function updateIM () {
-           if (arguments.length === 2) {
-             var label = arguments[0];
-             var im = arguments[1];
-             im.setAtLeastIfValid(label.getLocation(0, Position.ON), label.getLocation(1, Position.ON), 1);
-             if (label.isArea()) {
-               im.setAtLeastIfValid(label.getLocation(0, Position.LEFT), label.getLocation(1, Position.LEFT), 2);
-               im.setAtLeastIfValid(label.getLocation(0, Position.RIGHT), label.getLocation(1, Position.RIGHT), 2);
-             }
-           } else { return GraphComponent$$1.prototype.updateIM.apply(this, arguments) }
-         };
+                 hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
+                 return binl2rstr(binl(opad.concat(hash), 512 + 160));
+               }
+               /**
+                * Convert an array of little-endian words to a string
+                */

 
 

-         return Edge;
-       }(GraphComponent));

 
 

-       var BufferBuilder = function BufferBuilder (bufParams) {
-         this._workingPrecisionModel = null;
-         this._workingNoder = null;
-         this._geomFact = null;
-         this._graph = null;
-         this._edgeList = new EdgeList();
-         this._bufParams = bufParams || null;
-       };
-       BufferBuilder.prototype.setWorkingPrecisionModel = function setWorkingPrecisionModel (pm) {
-         this._workingPrecisionModel = pm;
-       };
-       BufferBuilder.prototype.insertUniqueEdge = function insertUniqueEdge (e) {
-         var existingEdge = this._edgeList.findEqualEdge(e);
-         if (existingEdge !== null) {
-           var existingLabel = existingEdge.getLabel();
-           var labelToMerge = e.getLabel();
-           if (!existingEdge.isPointwiseEqual(e)) {
-             labelToMerge = new Label(e.getLabel());
-             labelToMerge.flip();
-           }
-           existingLabel.merge(labelToMerge);
-           var mergeDelta = BufferBuilder.depthDelta(labelToMerge);
-           var existingDelta = existingEdge.getDepthDelta();
-           var newDelta = existingDelta + mergeDelta;
-           existingEdge.setDepthDelta(newDelta);
-         } else {
-           this._edgeList.add(e);
-           e.setDepthDelta(BufferBuilder.depthDelta(e.getLabel()));
-         }
-       };
-       BufferBuilder.prototype.buildSubgraphs = function buildSubgraphs (subgraphList, polyBuilder) {
-         var processedGraphs = new ArrayList();
-         for (var i = subgraphList.iterator(); i.hasNext();) {
-           var subgraph = i.next();
-           var p = subgraph.getRightmostCoordinate();
-           var locater = new SubgraphDepthLocater(processedGraphs);
-           var outsideDepth = locater.getDepth(p);
-           subgraph.computeDepth(outsideDepth);
-           subgraph.findResultEdges();
-           processedGraphs.add(subgraph);
-           polyBuilder.add(subgraph.getDirectedEdges(), subgraph.getNodes());
-         }
-       };
-       BufferBuilder.prototype.createSubgraphs = function createSubgraphs (graph) {
-         var subgraphList = new ArrayList();
-         for (var i = graph.getNodes().iterator(); i.hasNext();) {
-           var node = i.next();
-           if (!node.isVisited()) {
-             var subgraph = new BufferSubgraph();
-             subgraph.create(node);
-             subgraphList.add(subgraph);
-           }
-         }
-         Collections.sort(subgraphList, Collections.reverseOrder());
-         return subgraphList
-       };
-       BufferBuilder.prototype.createEmptyResultGeometry = function createEmptyResultGeometry () {
-         var emptyGeom = this._geomFact.createPolygon();
-         return emptyGeom
-       };
-       BufferBuilder.prototype.getNoder = function getNoder (precisionModel) {
-         if (this._workingNoder !== null) { return this._workingNoder }
-         var noder = new MCIndexNoder();
-         var li = new RobustLineIntersector();
-         li.setPrecisionModel(precisionModel);
-         noder.setSegmentIntersector(new IntersectionAdder(li));
-         return noder
-       };
-       BufferBuilder.prototype.buffer = function buffer (g, distance) {
-         var precisionModel = this._workingPrecisionModel;
-         if (precisionModel === null) { precisionModel = g.getPrecisionModel(); }
-         this._geomFact = g.getFactory();
-         var curveBuilder = new OffsetCurveBuilder(precisionModel, this._bufParams);
-         var curveSetBuilder = new OffsetCurveSetBuilder(g, distance, curveBuilder);
-         var bufferSegStrList = curveSetBuilder.getCurves();
-         if (bufferSegStrList.size() <= 0) {
-           return this.createEmptyResultGeometry()
-         }
-         this.computeNodedEdges(bufferSegStrList, precisionModel);
-         this._graph = new PlanarGraph(new OverlayNodeFactory());
-         this._graph.addEdges(this._edgeList.getEdges());
-         var subgraphList = this.createSubgraphs(this._graph);
-         var polyBuilder = new PolygonBuilder(this._geomFact);
-         this.buildSubgraphs(subgraphList, polyBuilder);
-         var resultPolyList = polyBuilder.getPolygons();
-         if (resultPolyList.size() <= 0) {
-           return this.createEmptyResultGeometry()
-         }
-         var resultGeom = this._geomFact.buildGeometry(resultPolyList);
-         return resultGeom
-       };
-       BufferBuilder.prototype.computeNodedEdges = function computeNodedEdges (bufferSegStrList, precisionModel) {
-           var this$1 = this;
-
-         var noder = this.getNoder(precisionModel);
-         noder.computeNodes(bufferSegStrList);
-         var nodedSegStrings = noder.getNodedSubstrings();
-         for (var i = nodedSegStrings.iterator(); i.hasNext();) {
-           var segStr = i.next();
-           var pts = segStr.getCoordinates();
-           if (pts.length === 2 && pts[0].equals2D(pts[1])) { continue }
-           var oldLabel = segStr.getData();
-           var edge = new Edge(segStr.getCoordinates(), new Label(oldLabel));
-           this$1.insertUniqueEdge(edge);
-         }
-       };
-       BufferBuilder.prototype.setNoder = function setNoder (noder) {
-         this._workingNoder = noder;
-       };
-       BufferBuilder.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       BufferBuilder.prototype.getClass = function getClass () {
-         return BufferBuilder
-       };
-       BufferBuilder.depthDelta = function depthDelta (label) {
-         var lLoc = label.getLocation(0, Position.LEFT);
-         var rLoc = label.getLocation(0, Position.RIGHT);
-         if (lLoc === Location.INTERIOR && rLoc === Location.EXTERIOR) { return 1; } else if (lLoc === Location.EXTERIOR && rLoc === Location.INTERIOR) { return -1 }
-         return 0
-       };
-       BufferBuilder.convertSegStrings = function convertSegStrings (it) {
-         var fact = new GeometryFactory();
-         var lines = new ArrayList();
-         while (it.hasNext()) {
-           var ss = it.next();
-           var line = fact.createLineString(ss.getCoordinates());
-           lines.add(line);
-         }
-         return fact.buildGeometry(lines)
-       };
+               function binl2rstr(input) {
+                 var i,
+                     output = '',
+                     l = input.length * 32;

 
 

-       var ScaledNoder = function ScaledNoder () {
-         this._noder = null;
-         this._scaleFactor = null;
-         this._offsetX = null;
-         this._offsetY = null;
-         this._isScaled = false;
-         if (arguments.length === 2) {
-           var noder = arguments[0];
-           var scaleFactor = arguments[1];
-           this._noder = noder;
-           this._scaleFactor = scaleFactor;
-           this._offsetX = 0.0;
-           this._offsetY = 0.0;
-           this._isScaled = !this.isIntegerPrecision();
-         } else if (arguments.length === 4) {
-           var noder$1 = arguments[0];
-           var scaleFactor$1 = arguments[1];
-           var offsetX = arguments[2];
-           var offsetY = arguments[3];
-           this._noder = noder$1;
-           this._scaleFactor = scaleFactor$1;
-           this._offsetX = offsetX;
-           this._offsetY = offsetY;
-           this._isScaled = !this.isIntegerPrecision();
-         }
-       };
-       ScaledNoder.prototype.rescale = function rescale () {
-           var this$1 = this;
-
-         if (hasInterface(arguments[0], Collection)) {
-           var segStrings = arguments[0];
-           for (var i = segStrings.iterator(); i.hasNext();) {
-             var ss = i.next();
-             this$1.rescale(ss.getCoordinates());
-           }
-         } else if (arguments[0] instanceof Array) {
-           var pts = arguments[0];
-           // let p0 = null
-           // let p1 = null
-           // if (pts.length === 2) {
-           // p0 = new Coordinate(pts[0])
-           // p1 = new Coordinate(pts[1])
-           // }
-           for (var i$1 = 0; i$1 < pts.length; i$1++) {
-             pts[i$1].x = pts[i$1].x / this$1._scaleFactor + this$1._offsetX;
-             pts[i$1].y = pts[i$1].y / this$1._scaleFactor + this$1._offsetY;
-           }
-           if (pts.length === 2 && pts[0].equals2D(pts[1])) {
-             System.out.println(pts);
-           }
-         }
-       };
-       ScaledNoder.prototype.scale = function scale () {
-           var this$1 = this;
-
-         if (hasInterface(arguments[0], Collection)) {
-           var segStrings = arguments[0];
-           var nodedSegmentStrings = new ArrayList();
-           for (var i = segStrings.iterator(); i.hasNext();) {
-             var ss = i.next();
-             nodedSegmentStrings.add(new NodedSegmentString(this$1.scale(ss.getCoordinates()), ss.getData()));
-           }
-           return nodedSegmentStrings
-         } else if (arguments[0] instanceof Array) {
-           var pts = arguments[0];
-           var roundPts = new Array(pts.length).fill(null);
-           for (var i$1 = 0; i$1 < pts.length; i$1++) {
-             roundPts[i$1] = new Coordinate(Math.round((pts[i$1].x - this$1._offsetX) * this$1._scaleFactor), Math.round((pts[i$1].y - this$1._offsetY) * this$1._scaleFactor), pts[i$1].z);
-           }
-           var roundPtsNoDup = CoordinateArrays.removeRepeatedPoints(roundPts);
-           return roundPtsNoDup
-         }
-       };
-       ScaledNoder.prototype.isIntegerPrecision = function isIntegerPrecision () {
-         return this._scaleFactor === 1.0
-       };
-       ScaledNoder.prototype.getNodedSubstrings = function getNodedSubstrings () {
-         var splitSS = this._noder.getNodedSubstrings();
-         if (this._isScaled) { this.rescale(splitSS); }
-         return splitSS
-       };
-       ScaledNoder.prototype.computeNodes = function computeNodes (inputSegStrings) {
-         var intSegStrings = inputSegStrings;
-         if (this._isScaled) { intSegStrings = this.scale(inputSegStrings); }
-         this._noder.computeNodes(intSegStrings);
-       };
-       ScaledNoder.prototype.interfaces_ = function interfaces_ () {
-         return [Noder]
-       };
-       ScaledNoder.prototype.getClass = function getClass () {
-         return ScaledNoder
-       };
+                 for (i = 0; i < l; i += 8) {
+                   output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+                 }

 
 

-       var NodingValidator = function NodingValidator () {
-         this._li = new RobustLineIntersector();
-         this._segStrings = null;
-         var segStrings = arguments[0];
-         this._segStrings = segStrings;
-       };
+                 return output;
+               }
+               /**
+                * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
+                */
+
+
+               function binl(x, len) {
+                 var T,
+                     j,
+                     i,
+                     l,
+                     h0 = 0x67452301,
+                     h1 = 0xefcdab89,
+                     h2 = 0x98badcfe,
+                     h3 = 0x10325476,
+                     h4 = 0xc3d2e1f0,
+                     A1,
+                     B1,
+                     C1,
+                     D1,
+                     E1,
+                     A2,
+                     B2,
+                     C2,
+                     D2,
+                     E2;
+                 /* append padding */
+
+                 x[len >> 5] |= 0x80 << len % 32;
+                 x[(len + 64 >>> 9 << 4) + 14] = len;
+                 l = x.length;
+
+                 for (i = 0; i < l; i += 16) {
+                   A1 = A2 = h0;
+                   B1 = B2 = h1;
+                   C1 = C2 = h2;
+                   D1 = D2 = h3;
+                   E1 = E2 = h4;
+
+                   for (j = 0; j <= 79; j += 1) {
+                     T = safe_add(A1, rmd160_f(j, B1, C1, D1));
+                     T = safe_add(T, x[i + rmd160_r1[j]]);
+                     T = safe_add(T, rmd160_K1(j));
+                     T = safe_add(bit_rol(T, rmd160_s1[j]), E1);
+                     A1 = E1;
+                     E1 = D1;
+                     D1 = bit_rol(C1, 10);
+                     C1 = B1;
+                     B1 = T;
+                     T = safe_add(A2, rmd160_f(79 - j, B2, C2, D2));
+                     T = safe_add(T, x[i + rmd160_r2[j]]);
+                     T = safe_add(T, rmd160_K2(j));
+                     T = safe_add(bit_rol(T, rmd160_s2[j]), E2);
+                     A2 = E2;
+                     E2 = D2;
+                     D2 = bit_rol(C2, 10);
+                     C2 = B2;
+                     B2 = T;
+                   }
+
+                   T = safe_add(h1, safe_add(C1, D2));
+                   h1 = safe_add(h2, safe_add(D1, E2));
+                   h2 = safe_add(h3, safe_add(E1, A2));
+                   h3 = safe_add(h4, safe_add(A1, B2));
+                   h4 = safe_add(h0, safe_add(B1, C2));
+                   h0 = T;
+                 }

 
 

-       var staticAccessors$33 = { fact: { configurable: true } };
-       NodingValidator.prototype.checkEndPtVertexIntersections = function checkEndPtVertexIntersections () {
-           var this$1 = this;
+                 return [h0, h1, h2, h3, h4];
+               } // specific algorithm methods

 
 

-         if (arguments.length === 0) {
-           for (var i = this._segStrings.iterator(); i.hasNext();) {
-             var ss = i.next();
-             var pts = ss.getCoordinates();
-             this$1.checkEndPtVertexIntersections(pts[0], this$1._segStrings);
-             this$1.checkEndPtVertexIntersections(pts[pts.length - 1], this$1._segStrings);
-           }
-         } else if (arguments.length === 2) {
-           var testPt = arguments[0];
-           var segStrings = arguments[1];
-           for (var i$1 = segStrings.iterator(); i$1.hasNext();) {
-             var ss$1 = i$1.next();
-             var pts$1 = ss$1.getCoordinates();
-             for (var j = 1; j < pts$1.length - 1; j++) {
-               if (pts$1[j].equals(testPt)) { throw new RuntimeException('found endpt/interior pt intersection at index ' + j + ' :pt ' + testPt) }
-             }
-           }
-         }
-       };
-       NodingValidator.prototype.checkInteriorIntersections = function checkInteriorIntersections () {
-           var this$1 = this;
-
-         if (arguments.length === 0) {
-           for (var i = this._segStrings.iterator(); i.hasNext();) {
-             var ss0 = i.next();
-             for (var j = this._segStrings.iterator(); j.hasNext();) {
-               var ss1 = j.next();
-               this$1.checkInteriorIntersections(ss0, ss1);
-             }
-           }
-         } else if (arguments.length === 2) {
-           var ss0$1 = arguments[0];
-           var ss1$1 = arguments[1];
-           var pts0 = ss0$1.getCoordinates();
-           var pts1 = ss1$1.getCoordinates();
-           for (var i0 = 0; i0 < pts0.length - 1; i0++) {
-             for (var i1 = 0; i1 < pts1.length - 1; i1++) {
-               this$1.checkInteriorIntersections(ss0$1, i0, ss1$1, i1);
-             }
-           }
-         } else if (arguments.length === 4) {
-           var e0 = arguments[0];
-           var segIndex0 = arguments[1];
-           var e1 = arguments[2];
-           var segIndex1 = arguments[3];
-           if (e0 === e1 && segIndex0 === segIndex1) { return null }
-           var p00 = e0.getCoordinates()[segIndex0];
-           var p01 = e0.getCoordinates()[segIndex0 + 1];
-           var p10 = e1.getCoordinates()[segIndex1];
-           var p11 = e1.getCoordinates()[segIndex1 + 1];
-           this._li.computeIntersection(p00, p01, p10, p11);
-           if (this._li.hasIntersection()) {
-             if (this._li.isProper() || this.hasInteriorIntersection(this._li, p00, p01) || this.hasInteriorIntersection(this._li, p10, p11)) {
-               throw new RuntimeException('found non-noded intersection at ' + p00 + '-' + p01 + ' and ' + p10 + '-' + p11)
-             }
-           }
-         }
-       };
-       NodingValidator.prototype.checkValid = function checkValid () {
-         this.checkEndPtVertexIntersections();
-         this.checkInteriorIntersections();
-         this.checkCollapses();
-       };
-       NodingValidator.prototype.checkCollapses = function checkCollapses () {
-           var this$1 = this;

 
 

-         if (arguments.length === 0) {
-           for (var i = this._segStrings.iterator(); i.hasNext();) {
-             var ss = i.next();
-             this$1.checkCollapses(ss);
-           }
-         } else if (arguments.length === 1) {
-           var ss$1 = arguments[0];
-           var pts = ss$1.getCoordinates();
-           for (var i$1 = 0; i$1 < pts.length - 2; i$1++) {
-             this$1.checkCollapse(pts[i$1], pts[i$1 + 1], pts[i$1 + 2]);
-           }
-         }
-       };
-       NodingValidator.prototype.hasInteriorIntersection = function hasInteriorIntersection (li, p0, p1) {
-         for (var i = 0; i < li.getIntersectionNum(); i++) {
-           var intPt = li.getIntersection(i);
-           if (!(intPt.equals(p0) || intPt.equals(p1))) { return true }
-         }
-         return false
-       };
-       NodingValidator.prototype.checkCollapse = function checkCollapse (p0, p1, p2) {
-         if (p0.equals(p2)) { throw new RuntimeException('found non-noded collapse at ' + NodingValidator.fact.createLineString([p0, p1, p2])) }
-       };
-       NodingValidator.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       NodingValidator.prototype.getClass = function getClass () {
-         return NodingValidator
-       };
-       staticAccessors$33.fact.get = function () { return new GeometryFactory() };
-
-       Object.defineProperties( NodingValidator, staticAccessors$33 );
-
-       var HotPixel = function HotPixel () {
-         this._li = null;
-         this._pt = null;
-         this._originalPt = null;
-         this._ptScaled = null;
-         this._p0Scaled = null;
-         this._p1Scaled = null;
-         this._scaleFactor = null;
-         this._minx = null;
-         this._maxx = null;
-         this._miny = null;
-         this._maxy = null;
-         this._corner = new Array(4).fill(null);
-         this._safeEnv = null;
-         var pt = arguments[0];
-         var scaleFactor = arguments[1];
-         var li = arguments[2];
-         this._originalPt = pt;
-         this._pt = pt;
-         this._scaleFactor = scaleFactor;
-         this._li = li;
-         if (scaleFactor <= 0) { throw new IllegalArgumentException('Scale factor must be non-zero') }
-         if (scaleFactor !== 1.0) {
-           this._pt = new Coordinate(this.scale(pt.x), this.scale(pt.y));
-           this._p0Scaled = new Coordinate();
-           this._p1Scaled = new Coordinate();
-         }
-         this.initCorners(this._pt);
-       };
+               function rmd160_f(j, x, y, z) {
+                 return 0 <= j && j <= 15 ? x ^ y ^ z : 16 <= j && j <= 31 ? x & y | ~x & z : 32 <= j && j <= 47 ? (x | ~y) ^ z : 48 <= j && j <= 63 ? x & z | y & ~z : 64 <= j && j <= 79 ? x ^ (y | ~z) : 'rmd160_f: j out of range';
+               }

 
 

-       var staticAccessors$34 = { SAFE_ENV_EXPANSION_FACTOR: { configurable: true } };
-       HotPixel.prototype.intersectsScaled = function intersectsScaled (p0, p1) {
-         var segMinx = Math.min(p0.x, p1.x);
-         var segMaxx = Math.max(p0.x, p1.x);
-         var segMiny = Math.min(p0.y, p1.y);
-         var segMaxy = Math.max(p0.y, p1.y);
-         var isOutsidePixelEnv = this._maxx < segMinx || this._minx > segMaxx || this._maxy < segMiny || this._miny > segMaxy;
-         if (isOutsidePixelEnv) { return false }
-         var intersects = this.intersectsToleranceSquare(p0, p1);
-         Assert.isTrue(!(isOutsidePixelEnv && intersects), 'Found bad envelope test');
-         return intersects
-       };
-       HotPixel.prototype.initCorners = function initCorners (pt) {
-         var tolerance = 0.5;
-         this._minx = pt.x - tolerance;
-         this._maxx = pt.x + tolerance;
-         this._miny = pt.y - tolerance;
-         this._maxy = pt.y + tolerance;
-         this._corner[0] = new Coordinate(this._maxx, this._maxy);
-         this._corner[1] = new Coordinate(this._minx, this._maxy);
-         this._corner[2] = new Coordinate(this._minx, this._miny);
-         this._corner[3] = new Coordinate(this._maxx, this._miny);
-       };
-       HotPixel.prototype.intersects = function intersects (p0, p1) {
-         if (this._scaleFactor === 1.0) { return this.intersectsScaled(p0, p1) }
-         this.copyScaled(p0, this._p0Scaled);
-         this.copyScaled(p1, this._p1Scaled);
-         return this.intersectsScaled(this._p0Scaled, this._p1Scaled)
-       };
-       HotPixel.prototype.scale = function scale (val) {
-         return Math.round(val * this._scaleFactor)
-       };
-       HotPixel.prototype.getCoordinate = function getCoordinate () {
-         return this._originalPt
-       };
-       HotPixel.prototype.copyScaled = function copyScaled (p, pScaled) {
-         pScaled.x = this.scale(p.x);
-         pScaled.y = this.scale(p.y);
-       };
-       HotPixel.prototype.getSafeEnvelope = function getSafeEnvelope () {
-         if (this._safeEnv === null) {
-           var safeTolerance = HotPixel.SAFE_ENV_EXPANSION_FACTOR / this._scaleFactor;
-           this._safeEnv = new Envelope(this._originalPt.x - safeTolerance, this._originalPt.x + safeTolerance, this._originalPt.y - safeTolerance, this._originalPt.y + safeTolerance);
-         }
-         return this._safeEnv
-       };
-       HotPixel.prototype.intersectsPixelClosure = function intersectsPixelClosure (p0, p1) {
-         this._li.computeIntersection(p0, p1, this._corner[0], this._corner[1]);
-         if (this._li.hasIntersection()) { return true }
-         this._li.computeIntersection(p0, p1, this._corner[1], this._corner[2]);
-         if (this._li.hasIntersection()) { return true }
-         this._li.computeIntersection(p0, p1, this._corner[2], this._corner[3]);
-         if (this._li.hasIntersection()) { return true }
-         this._li.computeIntersection(p0, p1, this._corner[3], this._corner[0]);
-         if (this._li.hasIntersection()) { return true }
-         return false
-       };
-       HotPixel.prototype.intersectsToleranceSquare = function intersectsToleranceSquare (p0, p1) {
-         var intersectsLeft = false;
-         var intersectsBottom = false;
-         this._li.computeIntersection(p0, p1, this._corner[0], this._corner[1]);
-         if (this._li.isProper()) { return true }
-         this._li.computeIntersection(p0, p1, this._corner[1], this._corner[2]);
-         if (this._li.isProper()) { return true }
-         if (this._li.hasIntersection()) { intersectsLeft = true; }
-         this._li.computeIntersection(p0, p1, this._corner[2], this._corner[3]);
-         if (this._li.isProper()) { return true }
-         if (this._li.hasIntersection()) { intersectsBottom = true; }
-         this._li.computeIntersection(p0, p1, this._corner[3], this._corner[0]);
-         if (this._li.isProper()) { return true }
-         if (intersectsLeft && intersectsBottom) { return true }
-         if (p0.equals(this._pt)) { return true }
-         if (p1.equals(this._pt)) { return true }
-         return false
-       };
-       HotPixel.prototype.addSnappedNode = function addSnappedNode (segStr, segIndex) {
-         var p0 = segStr.getCoordinate(segIndex);
-         var p1 = segStr.getCoordinate(segIndex + 1);
-         if (this.intersects(p0, p1)) {
-           segStr.addIntersection(this.getCoordinate(), segIndex);
-           return true
-         }
-         return false
-       };
-       HotPixel.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       HotPixel.prototype.getClass = function getClass () {
-         return HotPixel
-       };
-       staticAccessors$34.SAFE_ENV_EXPANSION_FACTOR.get = function () { return 0.75 };
+               function rmd160_K1(j) {
+                 return 0 <= j && j <= 15 ? 0x00000000 : 16 <= j && j <= 31 ? 0x5a827999 : 32 <= j && j <= 47 ? 0x6ed9eba1 : 48 <= j && j <= 63 ? 0x8f1bbcdc : 64 <= j && j <= 79 ? 0xa953fd4e : 'rmd160_K1: j out of range';
+               }
+
+               function rmd160_K2(j) {
+                 return 0 <= j && j <= 15 ? 0x50a28be6 : 16 <= j && j <= 31 ? 0x5c4dd124 : 32 <= j && j <= 47 ? 0x6d703ef3 : 48 <= j && j <= 63 ? 0x7a6d76e9 : 64 <= j && j <= 79 ? 0x00000000 : 'rmd160_K2: j out of range';
+               }
+             }
+           }; // exposes Hashes

 
 

-       Object.defineProperties( HotPixel, staticAccessors$34 );
+           (function (window, undefined$1) {
+             var freeExports = false;

 
 

-       var MonotoneChainSelectAction = function MonotoneChainSelectAction () {
-         this.tempEnv1 = new Envelope();
-         this.selectedSegment = new LineSegment();
-       };
-       MonotoneChainSelectAction.prototype.select = function select () {
-         if (arguments.length === 1) ; else if (arguments.length === 2) {
-           var mc = arguments[0];
-           var startIndex = arguments[1];
-           mc.getLineSegment(startIndex, this.selectedSegment);
-           this.select(this.selectedSegment);
-         }
-       };
-       MonotoneChainSelectAction.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       MonotoneChainSelectAction.prototype.getClass = function getClass () {
-         return MonotoneChainSelectAction
-       };
+             {
+               freeExports = exports;

 
 

-       var MCIndexPointSnapper = function MCIndexPointSnapper () {
-         this._index = null;
-         var index = arguments[0];
-         this._index = index;
-       };
+               if (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
+                 window = commonjsGlobal;
+               }
+             }

 
 

-       var staticAccessors$35 = { HotPixelSnapAction: { configurable: true } };
-       MCIndexPointSnapper.prototype.snap = function snap () {
-         if (arguments.length === 1) {
-           var hotPixel = arguments[0];
-           return this.snap(hotPixel, null, -1)
-         } else if (arguments.length === 3) {
-           var hotPixel$1 = arguments[0];
-           var parentEdge = arguments[1];
-           var hotPixelVertexIndex = arguments[2];
-           var pixelEnv = hotPixel$1.getSafeEnvelope();
-           var hotPixelSnapAction = new HotPixelSnapAction(hotPixel$1, parentEdge, hotPixelVertexIndex);
-           this._index.query(pixelEnv, {
-             interfaces_: function () {
-               return [ItemVisitor]
-             },
-             visitItem: function (item) {
-               var testChain = item;
-               testChain.select(pixelEnv, hotPixelSnapAction);
+             if (typeof undefined$1 === 'function' && _typeof(undefined$1.amd) === 'object' && undefined$1.amd) {
+               // define as an anonymous module, so, through path mapping, it can be aliased
+               undefined$1(function () {
+                 return Hashes;
+               });
+             } else if (freeExports) {
+               // in Node.js or RingoJS v0.8.0+
+               if (module && module.exports === freeExports) {
+                 module.exports = Hashes;
+               } // in Narwhal or RingoJS v0.7.0-
+               else {
+                   freeExports.Hashes = Hashes;
+                 }
+             } else {
+               // in a browser or Rhino
+               window.Hashes = Hashes;

              }
              }

-           });
-           return hotPixelSnapAction.isNodeAdded()
-         }
-       };
-       MCIndexPointSnapper.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       MCIndexPointSnapper.prototype.getClass = function getClass () {
-         return MCIndexPointSnapper
-       };
-       staticAccessors$35.HotPixelSnapAction.get = function () { return HotPixelSnapAction };
-
-       Object.defineProperties( MCIndexPointSnapper, staticAccessors$35 );
-
-       var HotPixelSnapAction = (function (MonotoneChainSelectAction$$1) {
-         function HotPixelSnapAction () {
-           MonotoneChainSelectAction$$1.call(this);
-           this._hotPixel = null;
-           this._parentEdge = null;
-           this._hotPixelVertexIndex = null;
-           this._isNodeAdded = false;
-           var hotPixel = arguments[0];
-           var parentEdge = arguments[1];
-           var hotPixelVertexIndex = arguments[2];
-           this._hotPixel = hotPixel;
-           this._parentEdge = parentEdge;
-           this._hotPixelVertexIndex = hotPixelVertexIndex;
-         }
-
-         if ( MonotoneChainSelectAction$$1 ) { HotPixelSnapAction.__proto__ = MonotoneChainSelectAction$$1; }
-         HotPixelSnapAction.prototype = Object.create( MonotoneChainSelectAction$$1 && MonotoneChainSelectAction$$1.prototype );
-         HotPixelSnapAction.prototype.constructor = HotPixelSnapAction;
-         HotPixelSnapAction.prototype.isNodeAdded = function isNodeAdded () {
-           return this._isNodeAdded
-         };
-         HotPixelSnapAction.prototype.select = function select () {
-           if (arguments.length === 2) {
-             var mc = arguments[0];
-             var startIndex = arguments[1];
-             var ss = mc.getContext();
-             if (this._parentEdge !== null) {
-               if (ss === this._parentEdge && startIndex === this._hotPixelVertexIndex) { return null }
-             }
-             this._isNodeAdded = this._hotPixel.addSnappedNode(ss, startIndex);
-           } else { return MonotoneChainSelectAction$$1.prototype.select.apply(this, arguments) }
-         };
-         HotPixelSnapAction.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         HotPixelSnapAction.prototype.getClass = function getClass () {
-           return HotPixelSnapAction
-         };
-
-         return HotPixelSnapAction;
-       }(MonotoneChainSelectAction));
-
-       var InteriorIntersectionFinderAdder = function InteriorIntersectionFinderAdder () {
-         this._li = null;
-         this._interiorIntersections = null;
-         var li = arguments[0];
-         this._li = li;
-         this._interiorIntersections = new ArrayList();
-       };
-       InteriorIntersectionFinderAdder.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {
-           var this$1 = this;
+           })(this);
+         })(); // IIFE
+
+       })(hashes$1, hashes$1.exports);
+
+       var hashes = hashes$1.exports,
+           sha1 = new hashes.SHA1(); // # xtend
+
+       var hasOwnProperty$1 = Object.prototype.hasOwnProperty;

 
 

-         if (e0 === e1 && segIndex0 === segIndex1) { return null }
-         var p00 = e0.getCoordinates()[segIndex0];
-         var p01 = e0.getCoordinates()[segIndex0 + 1];
-         var p10 = e1.getCoordinates()[segIndex1];
-         var p11 = e1.getCoordinates()[segIndex1 + 1];
-         this._li.computeIntersection(p00, p01, p10, p11);
-         if (this._li.hasIntersection()) {
-           if (this._li.isInteriorIntersection()) {
-             for (var intIndex = 0; intIndex < this._li.getIntersectionNum(); intIndex++) {
-               this$1._interiorIntersections.add(this$1._li.getIntersection(intIndex));
+       function xtend$1() {
+         var target = {};
+
+         for (var i = 0; i < arguments.length; i++) {
+           var source = arguments[i];
+
+           for (var key in source) {
+             if (hasOwnProperty$1.call(source, key)) {
+               target[key] = source[key];

              }
              }

-             e0.addIntersections(this._li, segIndex0, 0);
-             e1.addIntersections(this._li, segIndex1, 1);

            }
          }
            }
          }

-       };
-       InteriorIntersectionFinderAdder.prototype.isDone = function isDone () {
-         return false
-       };
-       InteriorIntersectionFinderAdder.prototype.getInteriorIntersections = function getInteriorIntersections () {
-         return this._interiorIntersections
-       };
-       InteriorIntersectionFinderAdder.prototype.interfaces_ = function interfaces_ () {
-         return [SegmentIntersector]
-       };
-       InteriorIntersectionFinderAdder.prototype.getClass = function getClass () {
-         return InteriorIntersectionFinderAdder
-       };

 
 

-       var MCIndexSnapRounder = function MCIndexSnapRounder () {
-         this._pm = null;
-         this._li = null;
-         this._scaleFactor = null;
-         this._noder = null;
-         this._pointSnapper = null;
-         this._nodedSegStrings = null;
-         var pm = arguments[0];
-         this._pm = pm;
-         this._li = new RobustLineIntersector();
-         this._li.setPrecisionModel(pm);
-         this._scaleFactor = pm.getScale();
-       };
-       MCIndexSnapRounder.prototype.checkCorrectness = function checkCorrectness (inputSegmentStrings) {
-         var resultSegStrings = NodedSegmentString.getNodedSubstrings(inputSegmentStrings);
-         var nv = new NodingValidator(resultSegStrings);
-         try {
-           nv.checkValid();
-         } catch (ex) {
-           if (ex instanceof Exception) {
-             ex.printStackTrace();
-           } else { throw ex }
-         } finally {}
-       };
-       MCIndexSnapRounder.prototype.getNodedSubstrings = function getNodedSubstrings () {
-         return NodedSegmentString.getNodedSubstrings(this._nodedSegStrings)
-       };
-       MCIndexSnapRounder.prototype.snapRound = function snapRound (segStrings, li) {
-         var intersections = this.findInteriorIntersections(segStrings, li);
-         this.computeIntersectionSnaps(intersections);
-         this.computeVertexSnaps(segStrings);
+         return target;
+       }
+
+       var ohauth$1 = {};
+
+       ohauth$1.qsString = function (obj) {
+         return Object.keys(obj).sort().map(function (key) {
+           return ohauth$1.percentEncode(key) + '=' + ohauth$1.percentEncode(obj[key]);
+         }).join('&');

        };
        };

-       MCIndexSnapRounder.prototype.findInteriorIntersections = function findInteriorIntersections (segStrings, li) {
-         var intFinderAdder = new InteriorIntersectionFinderAdder(li);
-         this._noder.setSegmentIntersector(intFinderAdder);
-         this._noder.computeNodes(segStrings);
-         return intFinderAdder.getInteriorIntersections()
+
+       ohauth$1.stringQs = function (str) {
+         return str.split('&').filter(function (pair) {
+           return pair !== '';
+         }).reduce(function (obj, pair) {
+           var parts = pair.split('=');
+           obj[decodeURIComponent(parts[0])] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
+           return obj;
+         }, {});

        };
        };

-       MCIndexSnapRounder.prototype.computeVertexSnaps = function computeVertexSnaps () {
-           var this$1 = this;

 
 

-         if (hasInterface(arguments[0], Collection)) {
-           var edges = arguments[0];
-           for (var i0 = edges.iterator(); i0.hasNext();) {
-             var edge0 = i0.next();
-             this$1.computeVertexSnaps(edge0);
-           }
-         } else if (arguments[0] instanceof NodedSegmentString) {
-           var e = arguments[0];
-           var pts0 = e.getCoordinates();
-           for (var i = 0; i < pts0.length; i++) {
-             var hotPixel = new HotPixel(pts0[i], this$1._scaleFactor, this$1._li);
-             var isNodeAdded = this$1._pointSnapper.snap(hotPixel, e, i);
-             if (isNodeAdded) {
-               e.addIntersection(pts0[i], i);
-             }
+       ohauth$1.rawxhr = function (method, url, data, headers, callback) {
+         var xhr = new XMLHttpRequest(),
+             twoHundred = /^20\d$/;
+
+         xhr.onreadystatechange = function () {
+           if (4 === xhr.readyState && 0 !== xhr.status) {
+             if (twoHundred.test(xhr.status)) callback(null, xhr);else return callback(xhr, null);

            }
            }

-         }
-       };
-       MCIndexSnapRounder.prototype.computeNodes = function computeNodes (inputSegmentStrings) {
-         this._nodedSegStrings = inputSegmentStrings;
-         this._noder = new MCIndexNoder();
-         this._pointSnapper = new MCIndexPointSnapper(this._noder.getIndex());
-         this.snapRound(inputSegmentStrings, this._li);
-       };
-       MCIndexSnapRounder.prototype.computeIntersectionSnaps = function computeIntersectionSnaps (snapPts) {
-           var this$1 = this;
+         };

 
 

-         for (var it = snapPts.iterator(); it.hasNext();) {
-           var snapPt = it.next();
-           var hotPixel = new HotPixel(snapPt, this$1._scaleFactor, this$1._li);
-           this$1._pointSnapper.snap(hotPixel);
-         }
-       };
-       MCIndexSnapRounder.prototype.interfaces_ = function interfaces_ () {
-         return [Noder]
-       };
-       MCIndexSnapRounder.prototype.getClass = function getClass () {
-         return MCIndexSnapRounder
-       };
+         xhr.onerror = function (e) {
+           return callback(e, null);
+         };

 
 

-       var BufferOp = function BufferOp () {
-         this._argGeom = null;
-         this._distance = null;
-         this._bufParams = new BufferParameters();
-         this._resultGeometry = null;
-         this._saveException = null;
-         if (arguments.length === 1) {
-           var g = arguments[0];
-           this._argGeom = g;
-         } else if (arguments.length === 2) {
-           var g$1 = arguments[0];
-           var bufParams = arguments[1];
-           this._argGeom = g$1;
-           this._bufParams = bufParams;
+         xhr.open(method, url, true);
+
+         for (var h in headers) {
+           xhr.setRequestHeader(h, headers[h]);

          }
          }

-       };

 
 

-       var staticAccessors$32 = { CAP_ROUND: { configurable: true },CAP_BUTT: { configurable: true },CAP_FLAT: { configurable: true },CAP_SQUARE: { configurable: true },MAX_PRECISION_DIGITS: { configurable: true } };
-       BufferOp.prototype.bufferFixedPrecision = function bufferFixedPrecision (fixedPM) {
-         var noder = new ScaledNoder(new MCIndexSnapRounder(new PrecisionModel(1.0)), fixedPM.getScale());
-         var bufBuilder = new BufferBuilder(this._bufParams);
-         bufBuilder.setWorkingPrecisionModel(fixedPM);
-         bufBuilder.setNoder(noder);
-         this._resultGeometry = bufBuilder.buffer(this._argGeom, this._distance);
+         xhr.send(data);
+         return xhr;

        };
        };

-       BufferOp.prototype.bufferReducedPrecision = function bufferReducedPrecision () {
-           var this$1 = this;

 
 

-         if (arguments.length === 0) {
-           for (var precDigits = BufferOp.MAX_PRECISION_DIGITS; precDigits >= 0; precDigits--) {
-             try {
-               this$1.bufferReducedPrecision(precDigits);
-             } catch (ex) {
-               if (ex instanceof TopologyException) {
-                 this$1._saveException = ex;
-               } else { throw ex }
-             } finally {}
-             if (this$1._resultGeometry !== null) { return null }
-           }
-           throw this._saveException
-         } else if (arguments.length === 1) {
-           var precisionDigits = arguments[0];
-           var sizeBasedScaleFactor = BufferOp.precisionScaleFactor(this._argGeom, this._distance, precisionDigits);
-           var fixedPM = new PrecisionModel(sizeBasedScaleFactor);
-           this.bufferFixedPrecision(fixedPM);
-         }
-       };
-       BufferOp.prototype.computeGeometry = function computeGeometry () {
-         this.bufferOriginalPrecision();
-         if (this._resultGeometry !== null) { return null }
-         var argPM = this._argGeom.getFactory().getPrecisionModel();
-         if (argPM.getType() === PrecisionModel.FIXED) { this.bufferFixedPrecision(argPM); } else { this.bufferReducedPrecision(); }
-       };
-       BufferOp.prototype.setQuadrantSegments = function setQuadrantSegments (quadrantSegments) {
-         this._bufParams.setQuadrantSegments(quadrantSegments);
-       };
-       BufferOp.prototype.bufferOriginalPrecision = function bufferOriginalPrecision () {
-         try {
-           var bufBuilder = new BufferBuilder(this._bufParams);
-           this._resultGeometry = bufBuilder.buffer(this._argGeom, this._distance);
-         } catch (ex) {
-           if (ex instanceof RuntimeException) {
-             this._saveException = ex;
-           } else { throw ex }
-         } finally {}
-       };
-       BufferOp.prototype.getResultGeometry = function getResultGeometry (distance) {
-         this._distance = distance;
-         this.computeGeometry();
-         return this._resultGeometry
-       };
-       BufferOp.prototype.setEndCapStyle = function setEndCapStyle (endCapStyle) {
-         this._bufParams.setEndCapStyle(endCapStyle);
-       };
-       BufferOp.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       BufferOp.prototype.getClass = function getClass () {
-         return BufferOp
-       };
-       BufferOp.bufferOp = function bufferOp () {
-         if (arguments.length === 2) {
-           var g = arguments[0];
-           var distance = arguments[1];
-           var gBuf = new BufferOp(g);
-           var geomBuf = gBuf.getResultGeometry(distance);
-           return geomBuf
-         } else if (arguments.length === 3) {
-           if (Number.isInteger(arguments[2]) && (arguments[0] instanceof Geometry && typeof arguments[1] === 'number')) {
-             var g$1 = arguments[0];
-             var distance$1 = arguments[1];
-             var quadrantSegments = arguments[2];
-             var bufOp = new BufferOp(g$1);
-             bufOp.setQuadrantSegments(quadrantSegments);
-             var geomBuf$1 = bufOp.getResultGeometry(distance$1);
-             return geomBuf$1
-           } else if (arguments[2] instanceof BufferParameters && (arguments[0] instanceof Geometry && typeof arguments[1] === 'number')) {
-             var g$2 = arguments[0];
-             var distance$2 = arguments[1];
-             var params = arguments[2];
-             var bufOp$1 = new BufferOp(g$2, params);
-             var geomBuf$2 = bufOp$1.getResultGeometry(distance$2);
-             return geomBuf$2
-           }
-         } else if (arguments.length === 4) {
-           var g$3 = arguments[0];
-           var distance$3 = arguments[1];
-           var quadrantSegments$1 = arguments[2];
-           var endCapStyle = arguments[3];
-           var bufOp$2 = new BufferOp(g$3);
-           bufOp$2.setQuadrantSegments(quadrantSegments$1);
-           bufOp$2.setEndCapStyle(endCapStyle);
-           var geomBuf$3 = bufOp$2.getResultGeometry(distance$3);
-           return geomBuf$3
-         }
-       };
-       BufferOp.precisionScaleFactor = function precisionScaleFactor (g, distance, maxPrecisionDigits) {
-         var env = g.getEnvelopeInternal();
-         var envMax = MathUtil.max(Math.abs(env.getMaxX()), Math.abs(env.getMaxY()), Math.abs(env.getMinX()), Math.abs(env.getMinY()));
-         var expandByDistance = distance > 0.0 ? distance : 0.0;
-         var bufEnvMax = envMax + 2 * expandByDistance;
-         var bufEnvPrecisionDigits = Math.trunc(Math.log(bufEnvMax) / Math.log(10) + 1.0);
-         var minUnitLog10 = maxPrecisionDigits - bufEnvPrecisionDigits;
-         var scaleFactor = Math.pow(10.0, minUnitLog10);
-         return scaleFactor
-       };
-       staticAccessors$32.CAP_ROUND.get = function () { return BufferParameters.CAP_ROUND };
-       staticAccessors$32.CAP_BUTT.get = function () { return BufferParameters.CAP_FLAT };
-       staticAccessors$32.CAP_FLAT.get = function () { return BufferParameters.CAP_FLAT };
-       staticAccessors$32.CAP_SQUARE.get = function () { return BufferParameters.CAP_SQUARE };
-       staticAccessors$32.MAX_PRECISION_DIGITS.get = function () { return 12 };
-
-       Object.defineProperties( BufferOp, staticAccessors$32 );
-
-       var PointPairDistance = function PointPairDistance () {
-         this._pt = [new Coordinate(), new Coordinate()];
-         this._distance = Double.NaN;
-         this._isNull = true;
-       };
-       PointPairDistance.prototype.getCoordinates = function getCoordinates () {
-         return this._pt
-       };
-       PointPairDistance.prototype.getCoordinate = function getCoordinate (i) {
-         return this._pt[i]
+       ohauth$1.xhr = function (method, url, auth, data, options, callback) {
+         var headers = options && options.header || {
+           'Content-Type': 'application/x-www-form-urlencoded'
+         };
+         headers.Authorization = 'OAuth ' + ohauth$1.authHeader(auth);
+         return ohauth$1.rawxhr(method, url, data, headers, callback);

        };
        };

-       PointPairDistance.prototype.setMinimum = function setMinimum () {
-         if (arguments.length === 1) {
-           var ptDist = arguments[0];
-           this.setMinimum(ptDist._pt[0], ptDist._pt[1]);
-         } else if (arguments.length === 2) {
-           var p0 = arguments[0];
-           var p1 = arguments[1];
-           if (this._isNull) {
-             this.initialize(p0, p1);
-             return null
-           }
-           var dist = p0.distance(p1);
-           if (dist < this._distance) { this.initialize(p0, p1, dist); }
+
+       ohauth$1.nonce = function () {
+         for (var o = ''; o.length < 6;) {
+           o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];

          }
          }

+
+         return o;

        };
        };

-       PointPairDistance.prototype.initialize = function initialize () {
-         if (arguments.length === 0) {
-           this._isNull = true;
-         } else if (arguments.length === 2) {
-           var p0 = arguments[0];
-           var p1 = arguments[1];
-           this._pt[0].setCoordinate(p0);
-           this._pt[1].setCoordinate(p1);
-           this._distance = p0.distance(p1);
-           this._isNull = false;
-         } else if (arguments.length === 3) {
-           var p0$1 = arguments[0];
-           var p1$1 = arguments[1];
-           var distance = arguments[2];
-           this._pt[0].setCoordinate(p0$1);
-           this._pt[1].setCoordinate(p1$1);
-           this._distance = distance;
-           this._isNull = false;
-         }
+
+       ohauth$1.authHeader = function (obj) {
+         return Object.keys(obj).sort().map(function (key) {
+           return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
+         }).join(', ');

        };
        };

-       PointPairDistance.prototype.getDistance = function getDistance () {
-         return this._distance
+
+       ohauth$1.timestamp = function () {
+         return ~~(+new Date() / 1000);

        };
        };

-       PointPairDistance.prototype.setMaximum = function setMaximum () {
-         if (arguments.length === 1) {
-           var ptDist = arguments[0];
-           this.setMaximum(ptDist._pt[0], ptDist._pt[1]);
-         } else if (arguments.length === 2) {
-           var p0 = arguments[0];
-           var p1 = arguments[1];
-           if (this._isNull) {
-             this.initialize(p0, p1);
-             return null
-           }
-           var dist = p0.distance(p1);
-           if (dist > this._distance) { this.initialize(p0, p1, dist); }
-         }
+
+       ohauth$1.percentEncode = function (s) {
+         return encodeURIComponent(s).replace(/\!/g, '%21').replace(/\'/g, '%27').replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');

        };
        };

-       PointPairDistance.prototype.interfaces_ = function interfaces_ () {
-         return []
+
+       ohauth$1.baseString = function (method, url, params) {
+         if (params.oauth_signature) delete params.oauth_signature;
+         return [method, ohauth$1.percentEncode(url), ohauth$1.percentEncode(ohauth$1.qsString(params))].join('&');

        };
        };

-       PointPairDistance.prototype.getClass = function getClass () {
-         return PointPairDistance
+
+       ohauth$1.signature = function (oauth_secret, token_secret, baseString) {
+         return sha1.b64_hmac(ohauth$1.percentEncode(oauth_secret) + '&' + ohauth$1.percentEncode(token_secret), baseString);

        };
        };

+       /**
+        * Takes an options object for configuration (consumer_key,
+        * consumer_secret, version, signature_method, token, token_secret)
+        * and returns a function that generates the Authorization header
+        * for given data.
+        *
+        * The returned function takes these parameters:
+        * - method: GET/POST/...
+        * - uri: full URI with protocol, port, path and query string
+        * - extra_params: any extra parameters (that are passed in the POST data),
+        *   can be an object or a from-urlencoded string.
+        *
+        * Returned function returns full OAuth header with "OAuth" string in it.
+        */

 
 

-       var DistanceToPointFinder = function DistanceToPointFinder () {};

 
 

-       DistanceToPointFinder.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       DistanceToPointFinder.prototype.getClass = function getClass () {
-         return DistanceToPointFinder
-       };
-       DistanceToPointFinder.computeDistance = function computeDistance () {
-         if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof LineString && arguments[1] instanceof Coordinate)) {
-           var line = arguments[0];
-           var pt = arguments[1];
-           var ptDist = arguments[2];
-           var coords = line.getCoordinates();
-           var tempSegment = new LineSegment();
-           for (var i = 0; i < coords.length - 1; i++) {
-             tempSegment.setCoordinates(coords[i], coords[i + 1]);
-             var closestPt = tempSegment.closestPoint(pt);
-             ptDist.setMinimum(closestPt, pt);
-           }
-         } else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof Polygon && arguments[1] instanceof Coordinate)) {
-           var poly = arguments[0];
-           var pt$1 = arguments[1];
-           var ptDist$1 = arguments[2];
-           DistanceToPointFinder.computeDistance(poly.getExteriorRing(), pt$1, ptDist$1);
-           for (var i$1 = 0; i$1 < poly.getNumInteriorRing(); i$1++) {
-             DistanceToPointFinder.computeDistance(poly.getInteriorRingN(i$1), pt$1, ptDist$1);
-           }
-         } else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof Geometry && arguments[1] instanceof Coordinate)) {
-           var geom = arguments[0];
-           var pt$2 = arguments[1];
-           var ptDist$2 = arguments[2];
-           if (geom instanceof LineString) {
-             DistanceToPointFinder.computeDistance(geom, pt$2, ptDist$2);
-           } else if (geom instanceof Polygon) {
-             DistanceToPointFinder.computeDistance(geom, pt$2, ptDist$2);
-           } else if (geom instanceof GeometryCollection) {
-             var gc = geom;
-             for (var i$2 = 0; i$2 < gc.getNumGeometries(); i$2++) {
-               var g = gc.getGeometryN(i$2);
-               DistanceToPointFinder.computeDistance(g, pt$2, ptDist$2);
-             }
-           } else {
-             ptDist$2.setMinimum(geom.getCoordinate(), pt$2);
+       ohauth$1.headerGenerator = function (options) {
+         options = options || {};
+         var consumer_key = options.consumer_key || '',
+             consumer_secret = options.consumer_secret || '',
+             signature_method = options.signature_method || 'HMAC-SHA1',
+             version = options.version || '1.0',
+             token = options.token || '',
+             token_secret = options.token_secret || '';
+         return function (method, uri, extra_params) {
+           method = method.toUpperCase();
+
+           if (typeof extra_params === 'string' && extra_params.length > 0) {
+             extra_params = ohauth$1.stringQs(extra_params);

            }
            }

-         } else if (arguments[2] instanceof PointPairDistance && (arguments[0] instanceof LineSegment && arguments[1] instanceof Coordinate)) {
-           var segment = arguments[0];
-           var pt$3 = arguments[1];
-           var ptDist$3 = arguments[2];
-           var closestPt$1 = segment.closestPoint(pt$3);
-           ptDist$3.setMinimum(closestPt$1, pt$3);
-         }
-       };

 
 

-       var BufferCurveMaximumDistanceFinder = function BufferCurveMaximumDistanceFinder (inputGeom) {
-         this._maxPtDist = new PointPairDistance();
-         this._inputGeom = inputGeom || null;
+           var uri_parts = uri.split('?', 2),
+               base_uri = uri_parts[0];
+           var query_params = uri_parts.length === 2 ? ohauth$1.stringQs(uri_parts[1]) : {};
+           var oauth_params = {
+             oauth_consumer_key: consumer_key,
+             oauth_signature_method: signature_method,
+             oauth_version: version,
+             oauth_timestamp: ohauth$1.timestamp(),
+             oauth_nonce: ohauth$1.nonce()
+           };
+           if (token) oauth_params.oauth_token = token;
+           var all_params = xtend$1({}, oauth_params, query_params, extra_params),
+               base_str = ohauth$1.baseString(method, base_uri, all_params);
+           oauth_params.oauth_signature = ohauth$1.signature(consumer_secret, token_secret, base_str);
+           return 'OAuth ' + ohauth$1.authHeader(oauth_params);
+         };

        };
 
        };
 

-       var staticAccessors$36 = { MaxPointDistanceFilter: { configurable: true },MaxMidpointDistanceFilter: { configurable: true } };
-       BufferCurveMaximumDistanceFinder.prototype.computeMaxMidpointDistance = function computeMaxMidpointDistance (curve) {
-         var distFilter = new MaxMidpointDistanceFilter(this._inputGeom);
-         curve.apply(distFilter);
-         this._maxPtDist.setMaximum(distFilter.getMaxPointDistance());
-       };
-       BufferCurveMaximumDistanceFinder.prototype.computeMaxVertexDistance = function computeMaxVertexDistance (curve) {
-         var distFilter = new MaxPointDistanceFilter(this._inputGeom);
-         curve.apply(distFilter);
-         this._maxPtDist.setMaximum(distFilter.getMaxPointDistance());
-       };
-       BufferCurveMaximumDistanceFinder.prototype.findDistance = function findDistance (bufferCurve) {
-         this.computeMaxVertexDistance(bufferCurve);
-         this.computeMaxMidpointDistance(bufferCurve);
-         return this._maxPtDist.getDistance()
-       };
-       BufferCurveMaximumDistanceFinder.prototype.getDistancePoints = function getDistancePoints () {
-         return this._maxPtDist
-       };
-       BufferCurveMaximumDistanceFinder.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       BufferCurveMaximumDistanceFinder.prototype.getClass = function getClass () {
-         return BufferCurveMaximumDistanceFinder
-       };
-       staticAccessors$36.MaxPointDistanceFilter.get = function () { return MaxPointDistanceFilter };
-       staticAccessors$36.MaxMidpointDistanceFilter.get = function () { return MaxMidpointDistanceFilter };
+       var ohauth_1 = ohauth$1;

 
 

-       Object.defineProperties( BufferCurveMaximumDistanceFinder, staticAccessors$36 );
+       var resolveUrl$1 = {exports: {}};

 
 

-       var MaxPointDistanceFilter = function MaxPointDistanceFilter (geom) {
-         this._maxPtDist = new PointPairDistance();
-         this._minPtDist = new PointPairDistance();
-         this._geom = geom || null;
-       };
-       MaxPointDistanceFilter.prototype.filter = function filter (pt) {
-         this._minPtDist.initialize();
-         DistanceToPointFinder.computeDistance(this._geom, pt, this._minPtDist);
-         this._maxPtDist.setMaximum(this._minPtDist);
-       };
-       MaxPointDistanceFilter.prototype.getMaxPointDistance = function getMaxPointDistance () {
-         return this._maxPtDist
-       };
-       MaxPointDistanceFilter.prototype.interfaces_ = function interfaces_ () {
-         return [CoordinateFilter]
-       };
-       MaxPointDistanceFilter.prototype.getClass = function getClass () {
-         return MaxPointDistanceFilter
-       };
+       (function (module, exports) {
+         // Copyright 2014 Simon Lydell
+         // X11 (“MIT”) Licensed. (See LICENSE.)
+         void function (root, factory) {
+           {
+             module.exports = factory();
+           }
+         }(commonjsGlobal, function () {
+           function resolveUrl()
+           /* ...urls */
+           {
+             var numUrls = arguments.length;

 
 

-       var MaxMidpointDistanceFilter = function MaxMidpointDistanceFilter (geom) {
-         this._maxPtDist = new PointPairDistance();
-         this._minPtDist = new PointPairDistance();
-         this._geom = geom || null;
-       };
-       MaxMidpointDistanceFilter.prototype.filter = function filter (seq, index) {
-         if (index === 0) { return null }
-         var p0 = seq.getCoordinate(index - 1);
-         var p1 = seq.getCoordinate(index);
-         var midPt = new Coordinate((p0.x + p1.x) / 2, (p0.y + p1.y) / 2);
-         this._minPtDist.initialize();
-         DistanceToPointFinder.computeDistance(this._geom, midPt, this._minPtDist);
-         this._maxPtDist.setMaximum(this._minPtDist);
-       };
-       MaxMidpointDistanceFilter.prototype.isDone = function isDone () {
-         return false
-       };
-       MaxMidpointDistanceFilter.prototype.isGeometryChanged = function isGeometryChanged () {
-         return false
-       };
-       MaxMidpointDistanceFilter.prototype.getMaxPointDistance = function getMaxPointDistance () {
-         return this._maxPtDist
-       };
-       MaxMidpointDistanceFilter.prototype.interfaces_ = function interfaces_ () {
-         return [CoordinateSequenceFilter]
-       };
-       MaxMidpointDistanceFilter.prototype.getClass = function getClass () {
-         return MaxMidpointDistanceFilter
-       };
+             if (numUrls === 0) {
+               throw new Error("resolveUrl requires at least one argument; got none.");
+             }

 
 

-       var PolygonExtracter = function PolygonExtracter (comps) {
-         this._comps = comps || null;
-       };
-       PolygonExtracter.prototype.filter = function filter (geom) {
-         if (geom instanceof Polygon) { this._comps.add(geom); }
-       };
-       PolygonExtracter.prototype.interfaces_ = function interfaces_ () {
-         return [GeometryFilter]
-       };
-       PolygonExtracter.prototype.getClass = function getClass () {
-         return PolygonExtracter
-       };
-       PolygonExtracter.getPolygons = function getPolygons () {
-         if (arguments.length === 1) {
-           var geom = arguments[0];
-           return PolygonExtracter.getPolygons(geom, new ArrayList())
-         } else if (arguments.length === 2) {
-           var geom$1 = arguments[0];
-           var list = arguments[1];
-           if (geom$1 instanceof Polygon) {
-             list.add(geom$1);
-           } else if (geom$1 instanceof GeometryCollection) {
-             geom$1.apply(new PolygonExtracter(list));
-           }
-           return list
-         }
-       };
+             var base = document.createElement("base");
+             base.href = arguments[0];

 
 

-       var LinearComponentExtracter = function LinearComponentExtracter () {
-         this._lines = null;
-         this._isForcedToLineString = false;
-         if (arguments.length === 1) {
-           var lines = arguments[0];
-           this._lines = lines;
-         } else if (arguments.length === 2) {
-           var lines$1 = arguments[0];
-           var isForcedToLineString = arguments[1];
-           this._lines = lines$1;
-           this._isForcedToLineString = isForcedToLineString;
-         }
-       };
-       LinearComponentExtracter.prototype.filter = function filter (geom) {
-         if (this._isForcedToLineString && geom instanceof LinearRing) {
-           var line = geom.getFactory().createLineString(geom.getCoordinateSequence());
-           this._lines.add(line);
-           return null
-         }
-         if (geom instanceof LineString) { this._lines.add(geom); }
-       };
-       LinearComponentExtracter.prototype.setForceToLineString = function setForceToLineString (isForcedToLineString) {
-         this._isForcedToLineString = isForcedToLineString;
-       };
-       LinearComponentExtracter.prototype.interfaces_ = function interfaces_ () {
-         return [GeometryComponentFilter]
-       };
-       LinearComponentExtracter.prototype.getClass = function getClass () {
-         return LinearComponentExtracter
-       };
-       LinearComponentExtracter.getGeometry = function getGeometry () {
-         if (arguments.length === 1) {
-           var geom = arguments[0];
-           return geom.getFactory().buildGeometry(LinearComponentExtracter.getLines(geom))
-         } else if (arguments.length === 2) {
-           var geom$1 = arguments[0];
-           var forceToLineString = arguments[1];
-           return geom$1.getFactory().buildGeometry(LinearComponentExtracter.getLines(geom$1, forceToLineString))
-         }
-       };
-       LinearComponentExtracter.getLines = function getLines () {
-         if (arguments.length === 1) {
-           var geom = arguments[0];
-           return LinearComponentExtracter.getLines(geom, false)
-         } else if (arguments.length === 2) {
-           if (hasInterface(arguments[0], Collection) && hasInterface(arguments[1], Collection)) {
-             var geoms = arguments[0];
-             var lines$1 = arguments[1];
-             for (var i = geoms.iterator(); i.hasNext();) {
-               var g = i.next();
-               LinearComponentExtracter.getLines(g, lines$1);
-             }
-             return lines$1
-           } else if (arguments[0] instanceof Geometry && typeof arguments[1] === 'boolean') {
-             var geom$1 = arguments[0];
-             var forceToLineString = arguments[1];
-             var lines = new ArrayList();
-             geom$1.apply(new LinearComponentExtracter(lines, forceToLineString));
-             return lines
-           } else if (arguments[0] instanceof Geometry && hasInterface(arguments[1], Collection)) {
-             var geom$2 = arguments[0];
-             var lines$2 = arguments[1];
-             if (geom$2 instanceof LineString) {
-               lines$2.add(geom$2);
-             } else {
-               geom$2.apply(new LinearComponentExtracter(lines$2));
+             if (numUrls === 1) {
+               return base.href;

              }
              }

-             return lines$2
-           }
-         } else if (arguments.length === 3) {
-           if (typeof arguments[2] === 'boolean' && (hasInterface(arguments[0], Collection) && hasInterface(arguments[1], Collection))) {
-             var geoms$1 = arguments[0];
-             var lines$3 = arguments[1];
-             var forceToLineString$1 = arguments[2];
-             for (var i$1 = geoms$1.iterator(); i$1.hasNext();) {
-               var g$1 = i$1.next();
-               LinearComponentExtracter.getLines(g$1, lines$3, forceToLineString$1);
+
+             var head = document.getElementsByTagName("head")[0];
+             head.insertBefore(base, head.firstChild);
+             var a = document.createElement("a");
+             var resolved;
+
+             for (var index = 1; index < numUrls; index++) {
+               a.href = arguments[index];
+               resolved = a.href;
+               base.href = resolved;

              }
              }

-             return lines$3
-           } else if (typeof arguments[2] === 'boolean' && (arguments[0] instanceof Geometry && hasInterface(arguments[1], Collection))) {
-             var geom$3 = arguments[0];
-             var lines$4 = arguments[1];
-             var forceToLineString$2 = arguments[2];
-             geom$3.apply(new LinearComponentExtracter(lines$4, forceToLineString$2));
-             return lines$4
+
+             head.removeChild(base);
+             return resolved;

            }
            }

-         }
-       };

 
 

-       var PointLocator = function PointLocator () {
-         this._boundaryRule = BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE;
-         this._isIn = null;
-         this._numBoundaries = null;
-         if (arguments.length === 0) ; else if (arguments.length === 1) {
-           var boundaryRule = arguments[0];
-           if (boundaryRule === null) { throw new IllegalArgumentException('Rule must be non-null') }
-           this._boundaryRule = boundaryRule;
-         }
+           return resolveUrl;
+         });
+       })(resolveUrl$1);
+
+       var assign = make_assign();
+       var create$1 = make_create();
+       var trim$1 = make_trim();
+       var Global$5 = typeof window !== 'undefined' ? window : commonjsGlobal;
+       var util$6 = {
+         assign: assign,
+         create: create$1,
+         trim: trim$1,
+         bind: bind$1,
+         slice: slice$1,
+         each: each$7,
+         map: map,
+         pluck: pluck$1,
+         isList: isList$1,
+         isFunction: isFunction$1,
+         isObject: isObject$1,
+         Global: Global$5

        };
        };

-       PointLocator.prototype.locateInternal = function locateInternal () {
-           var this$1 = this;
-
-         if (arguments[0] instanceof Coordinate && arguments[1] instanceof Polygon) {
-           var p = arguments[0];
-           var poly = arguments[1];
-           if (poly.isEmpty()) { return Location.EXTERIOR }
-           var shell = poly.getExteriorRing();
-           var shellLoc = this.locateInPolygonRing(p, shell);
-           if (shellLoc === Location.EXTERIOR) { return Location.EXTERIOR }
-           if (shellLoc === Location.BOUNDARY) { return Location.BOUNDARY }
-           for (var i = 0; i < poly.getNumInteriorRing(); i++) {
-             var hole = poly.getInteriorRingN(i);
-             var holeLoc = this$1.locateInPolygonRing(p, hole);
-             if (holeLoc === Location.INTERIOR) { return Location.EXTERIOR }
-             if (holeLoc === Location.BOUNDARY) { return Location.BOUNDARY }
-           }
-           return Location.INTERIOR
-         } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof LineString) {
-           var p$1 = arguments[0];
-           var l = arguments[1];
-           if (!l.getEnvelopeInternal().intersects(p$1)) { return Location.EXTERIOR }
-           var pt = l.getCoordinates();
-           if (!l.isClosed()) {
-             if (p$1.equals(pt[0]) || p$1.equals(pt[pt.length - 1])) {
-               return Location.BOUNDARY
-             }
-           }
-           if (CGAlgorithms.isOnLine(p$1, pt)) { return Location.INTERIOR }
-           return Location.EXTERIOR
-         } else if (arguments[0] instanceof Coordinate && arguments[1] instanceof Point$1) {
-           var p$2 = arguments[0];
-           var pt$1 = arguments[1];
-           var ptCoord = pt$1.getCoordinate();
-           if (ptCoord.equals2D(p$2)) { return Location.INTERIOR }
-           return Location.EXTERIOR
+
+       function make_assign() {
+         if (Object.assign) {
+           return Object.assign;
+         } else {
+           return function shimAssign(obj, props1, props2, etc) {
+             for (var i = 1; i < arguments.length; i++) {
+               each$7(Object(arguments[i]), function (val, key) {
+                 obj[key] = val;
+               });
+             }
+
+             return obj;
+           };

          }
          }

-       };
-       PointLocator.prototype.locateInPolygonRing = function locateInPolygonRing (p, ring) {
-         if (!ring.getEnvelopeInternal().intersects(p)) { return Location.EXTERIOR }
-         return CGAlgorithms.locatePointInRing(p, ring.getCoordinates())
-       };
-       PointLocator.prototype.intersects = function intersects (p, geom) {
-         return this.locate(p, geom) !== Location.EXTERIOR
-       };
-       PointLocator.prototype.updateLocationInfo = function updateLocationInfo (loc) {
-         if (loc === Location.INTERIOR) { this._isIn = true; }
-         if (loc === Location.BOUNDARY) { this._numBoundaries++; }
-       };
-       PointLocator.prototype.computeLocation = function computeLocation (p, geom) {
-           var this$1 = this;
-
-         if (geom instanceof Point$1) {
-           this.updateLocationInfo(this.locateInternal(p, geom));
-         }
-         if (geom instanceof LineString) {
-           this.updateLocationInfo(this.locateInternal(p, geom));
-         } else if (geom instanceof Polygon) {
-           this.updateLocationInfo(this.locateInternal(p, geom));
-         } else if (geom instanceof MultiLineString) {
-           var ml = geom;
-           for (var i = 0; i < ml.getNumGeometries(); i++) {
-             var l = ml.getGeometryN(i);
-             this$1.updateLocationInfo(this$1.locateInternal(p, l));
-           }
-         } else if (geom instanceof MultiPolygon) {
-           var mpoly = geom;
-           for (var i$1 = 0; i$1 < mpoly.getNumGeometries(); i$1++) {
-             var poly = mpoly.getGeometryN(i$1);
-             this$1.updateLocationInfo(this$1.locateInternal(p, poly));
-           }
-         } else if (geom instanceof GeometryCollection) {
-           var geomi = new GeometryCollectionIterator(geom);
-           while (geomi.hasNext()) {
-             var g2 = geomi.next();
-             if (g2 !== geom) { this$1.computeLocation(p, g2); }
-           }
+       }
+
+       function make_create() {
+         if (Object.create) {
+           return function create(obj, assignProps1, assignProps2, etc) {
+             var assignArgsList = slice$1(arguments, 1);
+             return assign.apply(this, [Object.create(obj)].concat(assignArgsList));
+           };
+         } else {
+           var F = function F() {}; // eslint-disable-line no-inner-declarations
+
+
+           return function create(obj, assignProps1, assignProps2, etc) {
+             var assignArgsList = slice$1(arguments, 1);
+             F.prototype = obj;
+             return assign.apply(this, [new F()].concat(assignArgsList));
+           };

          }
          }

-       };
-       PointLocator.prototype.locate = function locate (p, geom) {
-         if (geom.isEmpty()) { return Location.EXTERIOR }
-         if (geom instanceof LineString) {
-           return this.locateInternal(p, geom)
-         } else if (geom instanceof Polygon) {
-           return this.locateInternal(p, geom)
-         }
-         this._isIn = false;
-         this._numBoundaries = 0;
-         this.computeLocation(p, geom);
-         if (this._boundaryRule.isInBoundary(this._numBoundaries)) { return Location.BOUNDARY }
-         if (this._numBoundaries > 0 || this._isIn) { return Location.INTERIOR }
-         return Location.EXTERIOR
-       };
-       PointLocator.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       PointLocator.prototype.getClass = function getClass () {
-         return PointLocator
-       };
+       }

 
 

-       var GeometryLocation = function GeometryLocation () {
-         this._component = null;
-         this._segIndex = null;
-         this._pt = null;
-         if (arguments.length === 2) {
-           var component = arguments[0];
-           var pt = arguments[1];
-           GeometryLocation.call(this, component, GeometryLocation.INSIDE_AREA, pt);
-         } else if (arguments.length === 3) {
-           var component$1 = arguments[0];
-           var segIndex = arguments[1];
-           var pt$1 = arguments[2];
-           this._component = component$1;
-           this._segIndex = segIndex;
-           this._pt = pt$1;
+       function make_trim() {
+         if (String.prototype.trim) {
+           return function trim(str) {
+             return String.prototype.trim.call(str);
+           };
+         } else {
+           return function trim(str) {
+             return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
+           };

          }
          }

-       };
+       }

 
 

-       var staticAccessors$38 = { INSIDE_AREA: { configurable: true } };
-       GeometryLocation.prototype.isInsideArea = function isInsideArea () {
-         return this._segIndex === GeometryLocation.INSIDE_AREA
-       };
-       GeometryLocation.prototype.getCoordinate = function getCoordinate () {
-         return this._pt
-       };
-       GeometryLocation.prototype.getGeometryComponent = function getGeometryComponent () {
-         return this._component
-       };
-       GeometryLocation.prototype.getSegmentIndex = function getSegmentIndex () {
-         return this._segIndex
-       };
-       GeometryLocation.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       GeometryLocation.prototype.getClass = function getClass () {
-         return GeometryLocation
-       };
-       staticAccessors$38.INSIDE_AREA.get = function () { return -1 };
+       function bind$1(obj, fn) {
+         return function () {
+           return fn.apply(obj, Array.prototype.slice.call(arguments, 0));
+         };
+       }

 
 

-       Object.defineProperties( GeometryLocation, staticAccessors$38 );
+       function slice$1(arr, index) {
+         return Array.prototype.slice.call(arr, index || 0);
+       }

 
 

-       var PointExtracter = function PointExtracter (pts) {
-         this._pts = pts || null;
-       };
-       PointExtracter.prototype.filter = function filter (geom) {
-         if (geom instanceof Point$1) { this._pts.add(geom); }
-       };
-       PointExtracter.prototype.interfaces_ = function interfaces_ () {
-         return [GeometryFilter]
-       };
-       PointExtracter.prototype.getClass = function getClass () {
-         return PointExtracter
-       };
-       PointExtracter.getPoints = function getPoints () {
-         if (arguments.length === 1) {
-           var geom = arguments[0];
-           if (geom instanceof Point$1) {
-             return Collections.singletonList(geom)
-           }
-           return PointExtracter.getPoints(geom, new ArrayList())
-         } else if (arguments.length === 2) {
-           var geom$1 = arguments[0];
-           var list = arguments[1];
-           if (geom$1 instanceof Point$1) {
-             list.add(geom$1);
-           } else if (geom$1 instanceof GeometryCollection) {
-             geom$1.apply(new PointExtracter(list));
-           }
-           return list
-         }
-       };
+       function each$7(obj, fn) {
+         pluck$1(obj, function (val, key) {
+           fn(val, key);
+           return false;
+         });
+       }

 
 

-       var ConnectedElementLocationFilter = function ConnectedElementLocationFilter () {
-         this._locations = null;
-         var locations = arguments[0];
-         this._locations = locations;
-       };
-       ConnectedElementLocationFilter.prototype.filter = function filter (geom) {
-         if (geom instanceof Point$1 || geom instanceof LineString || geom instanceof Polygon) { this._locations.add(new GeometryLocation(geom, 0, geom.getCoordinate())); }
-       };
-       ConnectedElementLocationFilter.prototype.interfaces_ = function interfaces_ () {
-         return [GeometryFilter]
-       };
-       ConnectedElementLocationFilter.prototype.getClass = function getClass () {
-         return ConnectedElementLocationFilter
-       };
-       ConnectedElementLocationFilter.getLocations = function getLocations (geom) {
-         var locations = new ArrayList();
-         geom.apply(new ConnectedElementLocationFilter(locations));
-         return locations
-       };
+       function map(obj, fn) {
+         var res = isList$1(obj) ? [] : {};
+         pluck$1(obj, function (v, k) {
+           res[k] = fn(v, k);
+           return false;
+         });
+         return res;
+       }

 
 

-       var DistanceOp = function DistanceOp () {
-         this._geom = null;
-         this._terminateDistance = 0.0;
-         this._ptLocator = new PointLocator();
-         this._minDistanceLocation = null;
-         this._minDistance = Double.MAX_VALUE;
-         if (arguments.length === 2) {
-           var g0 = arguments[0];
-           var g1 = arguments[1];
-           this._geom = [g0, g1];
-           this._terminateDistance = 0.0;
-         } else if (arguments.length === 3) {
-           var g0$1 = arguments[0];
-           var g1$1 = arguments[1];
-           var terminateDistance = arguments[2];
-           this._geom = new Array(2).fill(null);
-           this._geom[0] = g0$1;
-           this._geom[1] = g1$1;
-           this._terminateDistance = terminateDistance;
-         }
-       };
-       DistanceOp.prototype.computeContainmentDistance = function computeContainmentDistance () {
-           var this$1 = this;
-
-         if (arguments.length === 0) {
-           var locPtPoly = new Array(2).fill(null);
-           this.computeContainmentDistance(0, locPtPoly);
-           if (this._minDistance <= this._terminateDistance) { return null }
-           this.computeContainmentDistance(1, locPtPoly);
-         } else if (arguments.length === 2) {
-           var polyGeomIndex = arguments[0];
-           var locPtPoly$1 = arguments[1];
-           var locationsIndex = 1 - polyGeomIndex;
-           var polys = PolygonExtracter.getPolygons(this._geom[polyGeomIndex]);
-           if (polys.size() > 0) {
-             var insideLocs = ConnectedElementLocationFilter.getLocations(this._geom[locationsIndex]);
-             this.computeContainmentDistance(insideLocs, polys, locPtPoly$1);
-             if (this._minDistance <= this._terminateDistance) {
-               this._minDistanceLocation[locationsIndex] = locPtPoly$1[0];
-               this._minDistanceLocation[polyGeomIndex] = locPtPoly$1[1];
-               return null
-             }
-           }
-         } else if (arguments.length === 3) {
-           if (arguments[2] instanceof Array && (hasInterface(arguments[0], List) && hasInterface(arguments[1], List))) {
-             var locs = arguments[0];
-             var polys$1 = arguments[1];
-             var locPtPoly$2 = arguments[2];
-             for (var i = 0; i < locs.size(); i++) {
-               var loc = locs.get(i);
-               for (var j = 0; j < polys$1.size(); j++) {
-                 this$1.computeContainmentDistance(loc, polys$1.get(j), locPtPoly$2);
-                 if (this$1._minDistance <= this$1._terminateDistance) { return null }
-               }
-             }
-           } else if (arguments[2] instanceof Array && (arguments[0] instanceof GeometryLocation && arguments[1] instanceof Polygon)) {
-             var ptLoc = arguments[0];
-             var poly = arguments[1];
-             var locPtPoly$3 = arguments[2];
-             var pt = ptLoc.getCoordinate();
-             if (Location.EXTERIOR !== this._ptLocator.locate(pt, poly)) {
-               this._minDistance = 0.0;
-               locPtPoly$3[0] = ptLoc;
-               locPtPoly$3[1] = new GeometryLocation(poly, pt);
-
-               return null
+       function pluck$1(obj, fn) {
+         if (isList$1(obj)) {
+           for (var i = 0; i < obj.length; i++) {
+             if (fn(obj[i], i)) {
+               return obj[i];

              }
            }
              }
            }

-         }
-       };
-       DistanceOp.prototype.computeMinDistanceLinesPoints = function computeMinDistanceLinesPoints (lines, points, locGeom) {
-           var this$1 = this;
-
-         for (var i = 0; i < lines.size(); i++) {
-           var line = lines.get(i);
-           for (var j = 0; j < points.size(); j++) {
-             var pt = points.get(j);
-             this$1.computeMinDistance(line, pt, locGeom);
-             if (this$1._minDistance <= this$1._terminateDistance) { return null }
-           }
-         }
-       };
-       DistanceOp.prototype.computeFacetDistance = function computeFacetDistance () {
-         var locGeom = new Array(2).fill(null);
-         var lines0 = LinearComponentExtracter.getLines(this._geom[0]);
-         var lines1 = LinearComponentExtracter.getLines(this._geom[1]);
-         var pts0 = PointExtracter.getPoints(this._geom[0]);
-         var pts1 = PointExtracter.getPoints(this._geom[1]);
-         this.computeMinDistanceLines(lines0, lines1, locGeom);
-         this.updateMinDistance(locGeom, false);
-         if (this._minDistance <= this._terminateDistance) { return null }
-         locGeom[0] = null;
-         locGeom[1] = null;
-         this.computeMinDistanceLinesPoints(lines0, pts1, locGeom);
-         this.updateMinDistance(locGeom, false);
-         if (this._minDistance <= this._terminateDistance) { return null }
-         locGeom[0] = null;
-         locGeom[1] = null;
-         this.computeMinDistanceLinesPoints(lines1, pts0, locGeom);
-         this.updateMinDistance(locGeom, true);
-         if (this._minDistance <= this._terminateDistance) { return null }
-         locGeom[0] = null;
-         locGeom[1] = null;
-         this.computeMinDistancePoints(pts0, pts1, locGeom);
-         this.updateMinDistance(locGeom, false);
-       };
-       DistanceOp.prototype.nearestLocations = function nearestLocations () {
-         this.computeMinDistance();
-         return this._minDistanceLocation
-       };
-       DistanceOp.prototype.updateMinDistance = function updateMinDistance (locGeom, flip) {
-         if (locGeom[0] === null) { return null }
-         if (flip) {
-           this._minDistanceLocation[0] = locGeom[1];
-           this._minDistanceLocation[1] = locGeom[0];

          } else {
          } else {

-           this._minDistanceLocation[0] = locGeom[0];
-           this._minDistanceLocation[1] = locGeom[1];
-         }
-       };
-       DistanceOp.prototype.nearestPoints = function nearestPoints () {
-         this.computeMinDistance();
-         var nearestPts = [this._minDistanceLocation[0].getCoordinate(), this._minDistanceLocation[1].getCoordinate()];
-         return nearestPts
-       };
-       DistanceOp.prototype.computeMinDistance = function computeMinDistance () {
-           var this$1 = this;
-
-         if (arguments.length === 0) {
-           if (this._minDistanceLocation !== null) { return null }
-           this._minDistanceLocation = new Array(2).fill(null);
-           this.computeContainmentDistance();
-           if (this._minDistance <= this._terminateDistance) { return null }
-           this.computeFacetDistance();
-         } else if (arguments.length === 3) {
-           if (arguments[2] instanceof Array && (arguments[0] instanceof LineString && arguments[1] instanceof Point$1)) {
-             var line = arguments[0];
-             var pt = arguments[1];
-             var locGeom = arguments[2];
-             if (line.getEnvelopeInternal().distance(pt.getEnvelopeInternal()) > this._minDistance) { return null }
-             var coord0 = line.getCoordinates();
-             var coord = pt.getCoordinate();
-             for (var i = 0; i < coord0.length - 1; i++) {
-               var dist = CGAlgorithms.distancePointLine(coord, coord0[i], coord0[i + 1]);
-               if (dist < this$1._minDistance) {
-                 this$1._minDistance = dist;
-                 var seg = new LineSegment(coord0[i], coord0[i + 1]);
-                 var segClosestPoint = seg.closestPoint(coord);
-                 locGeom[0] = new GeometryLocation(line, i, segClosestPoint);
-                 locGeom[1] = new GeometryLocation(pt, 0, coord);
-               }
-               if (this$1._minDistance <= this$1._terminateDistance) { return null }
-             }
-           } else if (arguments[2] instanceof Array && (arguments[0] instanceof LineString && arguments[1] instanceof LineString)) {
-             var line0 = arguments[0];
-             var line1 = arguments[1];
-             var locGeom$1 = arguments[2];
-             if (line0.getEnvelopeInternal().distance(line1.getEnvelopeInternal()) > this._minDistance) { return null }
-             var coord0$1 = line0.getCoordinates();
-             var coord1 = line1.getCoordinates();
-             for (var i$1 = 0; i$1 < coord0$1.length - 1; i$1++) {
-               for (var j = 0; j < coord1.length - 1; j++) {
-                 var dist$1 = CGAlgorithms.distanceLineLine(coord0$1[i$1], coord0$1[i$1 + 1], coord1[j], coord1[j + 1]);
-                 if (dist$1 < this$1._minDistance) {
-                   this$1._minDistance = dist$1;
-                   var seg0 = new LineSegment(coord0$1[i$1], coord0$1[i$1 + 1]);
-                   var seg1 = new LineSegment(coord1[j], coord1[j + 1]);
-                   var closestPt = seg0.closestPoints(seg1);
-                   locGeom$1[0] = new GeometryLocation(line0, i$1, closestPt[0]);
-                   locGeom$1[1] = new GeometryLocation(line1, j, closestPt[1]);
-                 }
-                 if (this$1._minDistance <= this$1._terminateDistance) { return null }
+           for (var key in obj) {
+             if (obj.hasOwnProperty(key)) {
+               if (fn(obj[key], key)) {
+                 return obj[key];

                }
              }
            }
          }
                }
              }
            }
          }

-       };
-       DistanceOp.prototype.computeMinDistancePoints = function computeMinDistancePoints (points0, points1, locGeom) {
-           var this$1 = this;
+       }

 
 

-         for (var i = 0; i < points0.size(); i++) {
-           var pt0 = points0.get(i);
-           for (var j = 0; j < points1.size(); j++) {
-             var pt1 = points1.get(j);
-             var dist = pt0.getCoordinate().distance(pt1.getCoordinate());
-             if (dist < this$1._minDistance) {
-               this$1._minDistance = dist;
-               locGeom[0] = new GeometryLocation(pt0, 0, pt0.getCoordinate());
-               locGeom[1] = new GeometryLocation(pt1, 0, pt1.getCoordinate());
-             }
-             if (this$1._minDistance <= this$1._terminateDistance) { return null }
-           }
-         }
-       };
-       DistanceOp.prototype.distance = function distance () {
-         if (this._geom[0] === null || this._geom[1] === null) { throw new IllegalArgumentException('null geometries are not supported') }
-         if (this._geom[0].isEmpty() || this._geom[1].isEmpty()) { return 0.0 }
-         this.computeMinDistance();
-         return this._minDistance
-       };
-       DistanceOp.prototype.computeMinDistanceLines = function computeMinDistanceLines (lines0, lines1, locGeom) {
-           var this$1 = this;
+       function isList$1(val) {
+         return val != null && typeof val != 'function' && typeof val.length == 'number';
+       }

 
 

-         for (var i = 0; i < lines0.size(); i++) {
-           var line0 = lines0.get(i);
-           for (var j = 0; j < lines1.size(); j++) {
-             var line1 = lines1.get(j);
-             this$1.computeMinDistance(line0, line1, locGeom);
-             if (this$1._minDistance <= this$1._terminateDistance) { return null }
-           }
-         }
-       };
-       DistanceOp.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       DistanceOp.prototype.getClass = function getClass () {
-         return DistanceOp
-       };
-       DistanceOp.distance = function distance (g0, g1) {
-         var distOp = new DistanceOp(g0, g1);
-         return distOp.distance()
-       };
-       DistanceOp.isWithinDistance = function isWithinDistance (g0, g1, distance) {
-         var distOp = new DistanceOp(g0, g1, distance);
-         return distOp.distance() <= distance
-       };
-       DistanceOp.nearestPoints = function nearestPoints (g0, g1) {
-         var distOp = new DistanceOp(g0, g1);
-         return distOp.nearestPoints()
-       };
+       function isFunction$1(val) {
+         return val && {}.toString.call(val) === '[object Function]';
+       }

 
 

-       var PointPairDistance$2 = function PointPairDistance () {
-         this._pt = [new Coordinate(), new Coordinate()];
-         this._distance = Double.NaN;
-         this._isNull = true;
-       };
-       PointPairDistance$2.prototype.getCoordinates = function getCoordinates () {
-         return this._pt
-       };
-       PointPairDistance$2.prototype.getCoordinate = function getCoordinate (i) {
-         return this._pt[i]
-       };
-       PointPairDistance$2.prototype.setMinimum = function setMinimum () {
-         if (arguments.length === 1) {
-           var ptDist = arguments[0];
-           this.setMinimum(ptDist._pt[0], ptDist._pt[1]);
-         } else if (arguments.length === 2) {
-           var p0 = arguments[0];
-           var p1 = arguments[1];
-           if (this._isNull) {
-             this.initialize(p0, p1);
-             return null
-           }
-           var dist = p0.distance(p1);
-           if (dist < this._distance) { this.initialize(p0, p1, dist); }
-         }
-       };
-       PointPairDistance$2.prototype.initialize = function initialize () {
-         if (arguments.length === 0) {
-           this._isNull = true;
-         } else if (arguments.length === 2) {
-           var p0 = arguments[0];
-           var p1 = arguments[1];
-           this._pt[0].setCoordinate(p0);
-           this._pt[1].setCoordinate(p1);
-           this._distance = p0.distance(p1);
-           this._isNull = false;
-         } else if (arguments.length === 3) {
-           var p0$1 = arguments[0];
-           var p1$1 = arguments[1];
-           var distance = arguments[2];
-           this._pt[0].setCoordinate(p0$1);
-           this._pt[1].setCoordinate(p1$1);
-           this._distance = distance;
-           this._isNull = false;
-         }
-       };
-       PointPairDistance$2.prototype.toString = function toString () {
-         return WKTWriter.toLineString(this._pt[0], this._pt[1])
-       };
-       PointPairDistance$2.prototype.getDistance = function getDistance () {
-         return this._distance
+       function isObject$1(val) {
+         return val && {}.toString.call(val) === '[object Object]';
+       }
+
+       var util$5 = util$6;
+       var slice = util$5.slice;
+       var pluck = util$5.pluck;
+       var each$6 = util$5.each;
+       var bind = util$5.bind;
+       var create = util$5.create;
+       var isList = util$5.isList;
+       var isFunction = util$5.isFunction;
+       var isObject = util$5.isObject;
+       var storeEngine = {
+         createStore: _createStore

        };
        };

-       PointPairDistance$2.prototype.setMaximum = function setMaximum () {
-         if (arguments.length === 1) {
-           var ptDist = arguments[0];
-           this.setMaximum(ptDist._pt[0], ptDist._pt[1]);
-         } else if (arguments.length === 2) {
-           var p0 = arguments[0];
-           var p1 = arguments[1];
-           if (this._isNull) {
-             this.initialize(p0, p1);
-             return null
-           }
-           var dist = p0.distance(p1);
-           if (dist > this._distance) { this.initialize(p0, p1, dist); }
+       var storeAPI = {
+         version: '2.0.12',
+         enabled: false,
+         // get returns the value of the given key. If that value
+         // is undefined, it returns optionalDefaultValue instead.
+         get: function get(key, optionalDefaultValue) {
+           var data = this.storage.read(this._namespacePrefix + key);
+           return this._deserialize(data, optionalDefaultValue);
+         },
+         // set will store the given value at key and returns value.
+         // Calling set with value === undefined is equivalent to calling remove.
+         set: function set(key, value) {
+           if (value === undefined) {
+             return this.remove(key);
+           }
+
+           this.storage.write(this._namespacePrefix + key, this._serialize(value));
+           return value;
+         },
+         // remove deletes the key and value stored at the given key.
+         remove: function remove(key) {
+           this.storage.remove(this._namespacePrefix + key);
+         },
+         // each will call the given callback once for each key-value pair
+         // in this store.
+         each: function each(callback) {
+           var self = this;
+           this.storage.each(function (val, namespacedKey) {
+             callback.call(self, self._deserialize(val), (namespacedKey || '').replace(self._namespaceRegexp, ''));
+           });
+         },
+         // clearAll will remove all the stored key-value pairs in this store.
+         clearAll: function clearAll() {
+           this.storage.clearAll();
+         },
+         // additional functionality that can't live in plugins
+         // ---------------------------------------------------
+         // hasNamespace returns true if this store instance has the given namespace.
+         hasNamespace: function hasNamespace(namespace) {
+           return this._namespacePrefix == '__storejs_' + namespace + '_';
+         },
+         // createStore creates a store.js instance with the first
+         // functioning storage in the list of storage candidates,
+         // and applies the the given mixins to the instance.
+         createStore: function createStore() {
+           return _createStore.apply(this, arguments);
+         },
+         addPlugin: function addPlugin(plugin) {
+           this._addPlugin(plugin);
+         },
+         namespace: function namespace(_namespace) {
+           return _createStore(this.storage, this.plugins, _namespace);

          }
        };
          }
        };

-       PointPairDistance$2.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       PointPairDistance$2.prototype.getClass = function getClass () {
-         return PointPairDistance$2
-       };

 
 

-       var DistanceToPoint = function DistanceToPoint () {};
+       function _warn() {
+         var _console = typeof console == 'undefined' ? null : console;

 
 

-       DistanceToPoint.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       DistanceToPoint.prototype.getClass = function getClass () {
-         return DistanceToPoint
-       };
-       DistanceToPoint.computeDistance = function computeDistance () {
-         if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof LineString && arguments[1] instanceof Coordinate)) {
-           var line = arguments[0];
-           var pt = arguments[1];
-           var ptDist = arguments[2];
-           var tempSegment = new LineSegment();
-           var coords = line.getCoordinates();
-           for (var i = 0; i < coords.length - 1; i++) {
-             tempSegment.setCoordinates(coords[i], coords[i + 1]);
-             var closestPt = tempSegment.closestPoint(pt);
-             ptDist.setMinimum(closestPt, pt);
-           }
-         } else if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof Polygon && arguments[1] instanceof Coordinate)) {
-           var poly = arguments[0];
-           var pt$1 = arguments[1];
-           var ptDist$1 = arguments[2];
-           DistanceToPoint.computeDistance(poly.getExteriorRing(), pt$1, ptDist$1);
-           for (var i$1 = 0; i$1 < poly.getNumInteriorRing(); i$1++) {
-             DistanceToPoint.computeDistance(poly.getInteriorRingN(i$1), pt$1, ptDist$1);
-           }
-         } else if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof Geometry && arguments[1] instanceof Coordinate)) {
-           var geom = arguments[0];
-           var pt$2 = arguments[1];
-           var ptDist$2 = arguments[2];
-           if (geom instanceof LineString) {
-             DistanceToPoint.computeDistance(geom, pt$2, ptDist$2);
-           } else if (geom instanceof Polygon) {
-             DistanceToPoint.computeDistance(geom, pt$2, ptDist$2);
-           } else if (geom instanceof GeometryCollection) {
-             var gc = geom;
-             for (var i$2 = 0; i$2 < gc.getNumGeometries(); i$2++) {
-               var g = gc.getGeometryN(i$2);
-               DistanceToPoint.computeDistance(g, pt$2, ptDist$2);
-             }
-           } else {
-             ptDist$2.setMinimum(geom.getCoordinate(), pt$2);
-           }
-         } else if (arguments[2] instanceof PointPairDistance$2 && (arguments[0] instanceof LineSegment && arguments[1] instanceof Coordinate)) {
-           var segment = arguments[0];
-           var pt$3 = arguments[1];
-           var ptDist$3 = arguments[2];
-           var closestPt$1 = segment.closestPoint(pt$3);
-           ptDist$3.setMinimum(closestPt$1, pt$3);
+         if (!_console) {
+           return;

          }
          }

-       };

 
 

-       var DiscreteHausdorffDistance = function DiscreteHausdorffDistance () {
-         this._g0 = null;
-         this._g1 = null;
-         this._ptDist = new PointPairDistance$2();
-         this._densifyFrac = 0.0;
-         var g0 = arguments[0];
-         var g1 = arguments[1];
-         this._g0 = g0;
-         this._g1 = g1;
-       };
+         var fn = _console.warn ? _console.warn : _console.log;
+         fn.apply(_console, arguments);
+       }

 
 

-       var staticAccessors$39 = { MaxPointDistanceFilter: { configurable: true },MaxDensifiedByFractionDistanceFilter: { configurable: true } };
-       DiscreteHausdorffDistance.prototype.getCoordinates = function getCoordinates () {
-         return this._ptDist.getCoordinates()
-       };
-       DiscreteHausdorffDistance.prototype.setDensifyFraction = function setDensifyFraction (densifyFrac) {
-         if (densifyFrac > 1.0 || densifyFrac <= 0.0) { throw new IllegalArgumentException('Fraction is not in range (0.0 - 1.0]') }
-         this._densifyFrac = densifyFrac;
-       };
-       DiscreteHausdorffDistance.prototype.compute = function compute (g0, g1) {
-         this.computeOrientedDistance(g0, g1, this._ptDist);
-         this.computeOrientedDistance(g1, g0, this._ptDist);
-       };
-       DiscreteHausdorffDistance.prototype.distance = function distance () {
-         this.compute(this._g0, this._g1);
-         return this._ptDist.getDistance()
-       };
-       DiscreteHausdorffDistance.prototype.computeOrientedDistance = function computeOrientedDistance (discreteGeom, geom, ptDist) {
-         var distFilter = new MaxPointDistanceFilter$1(geom);
-         discreteGeom.apply(distFilter);
-         ptDist.setMaximum(distFilter.getMaxPointDistance());
-         if (this._densifyFrac > 0) {
-           var fracFilter = new MaxDensifiedByFractionDistanceFilter(geom, this._densifyFrac);
-           discreteGeom.apply(fracFilter);
-           ptDist.setMaximum(fracFilter.getMaxPointDistance());
+       function _createStore(storages, plugins, namespace) {
+         if (!namespace) {
+           namespace = '';

          }
          }

-       };
-       DiscreteHausdorffDistance.prototype.orientedDistance = function orientedDistance () {
-         this.computeOrientedDistance(this._g0, this._g1, this._ptDist);
-         return this._ptDist.getDistance()
-       };
-       DiscreteHausdorffDistance.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       DiscreteHausdorffDistance.prototype.getClass = function getClass () {
-         return DiscreteHausdorffDistance
-       };
-       DiscreteHausdorffDistance.distance = function distance () {
-         if (arguments.length === 2) {
-           var g0 = arguments[0];
-           var g1 = arguments[1];
-           var dist = new DiscreteHausdorffDistance(g0, g1);
-           return dist.distance()
-         } else if (arguments.length === 3) {
-           var g0$1 = arguments[0];
-           var g1$1 = arguments[1];
-           var densifyFrac = arguments[2];
-           var dist$1 = new DiscreteHausdorffDistance(g0$1, g1$1);
-           dist$1.setDensifyFraction(densifyFrac);
-           return dist$1.distance()
+
+         if (storages && !isList(storages)) {
+           storages = [storages];

          }
          }

-       };
-       staticAccessors$39.MaxPointDistanceFilter.get = function () { return MaxPointDistanceFilter$1 };
-       staticAccessors$39.MaxDensifiedByFractionDistanceFilter.get = function () { return MaxDensifiedByFractionDistanceFilter };
-
-       Object.defineProperties( DiscreteHausdorffDistance, staticAccessors$39 );
-
-       var MaxPointDistanceFilter$1 = function MaxPointDistanceFilter () {
-         this._maxPtDist = new PointPairDistance$2();
-         this._minPtDist = new PointPairDistance$2();
-         this._euclideanDist = new DistanceToPoint();
-         this._geom = null;
-         var geom = arguments[0];
-         this._geom = geom;
-       };
-       MaxPointDistanceFilter$1.prototype.filter = function filter (pt) {
-         this._minPtDist.initialize();
-         DistanceToPoint.computeDistance(this._geom, pt, this._minPtDist);
-         this._maxPtDist.setMaximum(this._minPtDist);
-       };
-       MaxPointDistanceFilter$1.prototype.getMaxPointDistance = function getMaxPointDistance () {
-         return this._maxPtDist
-       };
-       MaxPointDistanceFilter$1.prototype.interfaces_ = function interfaces_ () {
-         return [CoordinateFilter]
-       };
-       MaxPointDistanceFilter$1.prototype.getClass = function getClass () {
-         return MaxPointDistanceFilter$1
-       };

 
 

-       var MaxDensifiedByFractionDistanceFilter = function MaxDensifiedByFractionDistanceFilter () {
-         this._maxPtDist = new PointPairDistance$2();
-         this._minPtDist = new PointPairDistance$2();
-         this._geom = null;
-         this._numSubSegs = 0;
-         var geom = arguments[0];
-         var fraction = arguments[1];
-         this._geom = geom;
-         this._numSubSegs = Math.trunc(Math.round(1.0 / fraction));
-       };
-       MaxDensifiedByFractionDistanceFilter.prototype.filter = function filter (seq, index) {
-           var this$1 = this;
-
-         if (index === 0) { return null }
-         var p0 = seq.getCoordinate(index - 1);
-         var p1 = seq.getCoordinate(index);
-         var delx = (p1.x - p0.x) / this._numSubSegs;
-         var dely = (p1.y - p0.y) / this._numSubSegs;
-         for (var i = 0; i < this._numSubSegs; i++) {
-           var x = p0.x + i * delx;
-           var y = p0.y + i * dely;
-           var pt = new Coordinate(x, y);
-           this$1._minPtDist.initialize();
-           DistanceToPoint.computeDistance(this$1._geom, pt, this$1._minPtDist);
-           this$1._maxPtDist.setMaximum(this$1._minPtDist);
+         if (plugins && !isList(plugins)) {
+           plugins = [plugins];

          }
          }

-       };
-       MaxDensifiedByFractionDistanceFilter.prototype.isDone = function isDone () {
-         return false
-       };
-       MaxDensifiedByFractionDistanceFilter.prototype.isGeometryChanged = function isGeometryChanged () {
-         return false
-       };
-       MaxDensifiedByFractionDistanceFilter.prototype.getMaxPointDistance = function getMaxPointDistance () {
-         return this._maxPtDist
-       };
-       MaxDensifiedByFractionDistanceFilter.prototype.interfaces_ = function interfaces_ () {
-         return [CoordinateSequenceFilter]
-       };
-       MaxDensifiedByFractionDistanceFilter.prototype.getClass = function getClass () {
-         return MaxDensifiedByFractionDistanceFilter
-       };

 
 

-       var BufferDistanceValidator = function BufferDistanceValidator (input, bufDistance, result) {
-         this._minValidDistance = null;
-         this._maxValidDistance = null;
-         this._minDistanceFound = null;
-         this._maxDistanceFound = null;
-         this._isValid = true;
-         this._errMsg = null;
-         this._errorLocation = null;
-         this._errorIndicator = null;
-         this._input = input || null;
-         this._bufDistance = bufDistance || null;
-         this._result = result || null;
-       };
+         var namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
+         var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
+         var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash

 
 

-       var staticAccessors$37 = { VERBOSE: { configurable: true },MAX_DISTANCE_DIFF_FRAC: { configurable: true } };
-       BufferDistanceValidator.prototype.checkMaximumDistance = function checkMaximumDistance (input, bufCurve, maxDist) {
-         var haus = new DiscreteHausdorffDistance(bufCurve, input);
-         haus.setDensifyFraction(0.25);
-         this._maxDistanceFound = haus.orientedDistance();
-         if (this._maxDistanceFound > maxDist) {
-           this._isValid = false;
-           var pts = haus.getCoordinates();
-           this._errorLocation = pts[1];
-           this._errorIndicator = input.getFactory().createLineString(pts);
-           this._errMsg = 'Distance between buffer curve and input is too large (' + this._maxDistanceFound + ' at ' + WKTWriter.toLineString(pts[0], pts[1]) + ')';
-         }
-       };
-       BufferDistanceValidator.prototype.isValid = function isValid () {
-         var posDistance = Math.abs(this._bufDistance);
-         var distDelta = BufferDistanceValidator.MAX_DISTANCE_DIFF_FRAC * posDistance;
-         this._minValidDistance = posDistance - distDelta;
-         this._maxValidDistance = posDistance + distDelta;
-         if (this._input.isEmpty() || this._result.isEmpty()) { return true }
-         if (this._bufDistance > 0.0) {
-           this.checkPositiveValid();
-         } else {
-           this.checkNegativeValid();
-         }
-         if (BufferDistanceValidator.VERBOSE) {
-           System.out.println('Min Dist= ' + this._minDistanceFound + '  err= ' + (1.0 - this._minDistanceFound / this._bufDistance) + '  Max Dist= ' + this._maxDistanceFound + '  err= ' + (this._maxDistanceFound / this._bufDistance - 1.0));
-         }
-         return this._isValid
-       };
-       BufferDistanceValidator.prototype.checkNegativeValid = function checkNegativeValid () {
-         if (!(this._input instanceof Polygon || this._input instanceof MultiPolygon || this._input instanceof GeometryCollection)) {
-           return null
-         }
-         var inputCurve = this.getPolygonLines(this._input);
-         this.checkMinimumDistance(inputCurve, this._result, this._minValidDistance);
-         if (!this._isValid) { return null }
-         this.checkMaximumDistance(inputCurve, this._result, this._maxValidDistance);
-       };
-       BufferDistanceValidator.prototype.getErrorIndicator = function getErrorIndicator () {
-         return this._errorIndicator
-       };
-       BufferDistanceValidator.prototype.checkMinimumDistance = function checkMinimumDistance (g1, g2, minDist) {
-         var distOp = new DistanceOp(g1, g2, minDist);
-         this._minDistanceFound = distOp.distance();
-         if (this._minDistanceFound < minDist) {
-           this._isValid = false;
-           var pts = distOp.nearestPoints();
-           this._errorLocation = distOp.nearestPoints()[1];
-           this._errorIndicator = g1.getFactory().createLineString(pts);
-           this._errMsg = 'Distance between buffer curve and input is too small (' + this._minDistanceFound + ' at ' + WKTWriter.toLineString(pts[0], pts[1]) + ' )';
+         if (!legalNamespaces.test(namespace)) {
+           throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');

          }
          }

-       };
-       BufferDistanceValidator.prototype.checkPositiveValid = function checkPositiveValid () {
-         var bufCurve = this._result.getBoundary();
-         this.checkMinimumDistance(this._input, bufCurve, this._minValidDistance);
-         if (!this._isValid) { return null }
-         this.checkMaximumDistance(this._input, bufCurve, this._maxValidDistance);
-       };
-       BufferDistanceValidator.prototype.getErrorLocation = function getErrorLocation () {
-         return this._errorLocation
-       };
-       BufferDistanceValidator.prototype.getPolygonLines = function getPolygonLines (g) {
-         var lines = new ArrayList();
-         var lineExtracter = new LinearComponentExtracter(lines);
-         var polys = PolygonExtracter.getPolygons(g);
-         for (var i = polys.iterator(); i.hasNext();) {
-           var poly = i.next();
-           poly.apply(lineExtracter);
-         }
-         return g.getFactory().buildGeometry(lines)
-       };
-       BufferDistanceValidator.prototype.getErrorMessage = function getErrorMessage () {
-         return this._errMsg
-       };
-       BufferDistanceValidator.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       BufferDistanceValidator.prototype.getClass = function getClass () {
-         return BufferDistanceValidator
-       };
-       staticAccessors$37.VERBOSE.get = function () { return false };
-       staticAccessors$37.MAX_DISTANCE_DIFF_FRAC.get = function () { return 0.012 };
-
-       Object.defineProperties( BufferDistanceValidator, staticAccessors$37 );
-
-       var BufferResultValidator = function BufferResultValidator (input, distance, result) {
-         this._isValid = true;
-         this._errorMsg = null;
-         this._errorLocation = null;
-         this._errorIndicator = null;
-         this._input = input || null;
-         this._distance = distance || null;
-         this._result = result || null;
-       };

 
 

-       var staticAccessors$40 = { VERBOSE: { configurable: true },MAX_ENV_DIFF_FRAC: { configurable: true } };
-       BufferResultValidator.prototype.isValid = function isValid () {
-         this.checkPolygonal();
-         if (!this._isValid) { return this._isValid }
-         this.checkExpectedEmpty();
-         if (!this._isValid) { return this._isValid }
-         this.checkEnvelope();
-         if (!this._isValid) { return this._isValid }
-         this.checkArea();
-         if (!this._isValid) { return this._isValid }
-         this.checkDistance();
-         return this._isValid
-       };
-       BufferResultValidator.prototype.checkEnvelope = function checkEnvelope () {
-         if (this._distance < 0.0) { return null }
-         var padding = this._distance * BufferResultValidator.MAX_ENV_DIFF_FRAC;
-         if (padding === 0.0) { padding = 0.001; }
-         var expectedEnv = new Envelope(this._input.getEnvelopeInternal());
-         expectedEnv.expandBy(this._distance);
-         var bufEnv = new Envelope(this._result.getEnvelopeInternal());
-         bufEnv.expandBy(padding);
-         if (!bufEnv.contains(expectedEnv)) {
-           this._isValid = false;
-           this._errorMsg = 'Buffer envelope is incorrect';
-           this._errorIndicator = this._input.getFactory().toGeometry(bufEnv);
-         }
-         this.report('Envelope');
-       };
-       BufferResultValidator.prototype.checkDistance = function checkDistance () {
-         var distValid = new BufferDistanceValidator(this._input, this._distance, this._result);
-         if (!distValid.isValid()) {
-           this._isValid = false;
-           this._errorMsg = distValid.getErrorMessage();
-           this._errorLocation = distValid.getErrorLocation();
-           this._errorIndicator = distValid.getErrorIndicator();
-         }
-         this.report('Distance');
-       };
-       BufferResultValidator.prototype.checkArea = function checkArea () {
-         var inputArea = this._input.getArea();
-         var resultArea = this._result.getArea();
-         if (this._distance > 0.0 && inputArea > resultArea) {
-           this._isValid = false;
-           this._errorMsg = 'Area of positive buffer is smaller than input';
-           this._errorIndicator = this._result;
-         }
-         if (this._distance < 0.0 && inputArea < resultArea) {
-           this._isValid = false;
-           this._errorMsg = 'Area of negative buffer is larger than input';
-           this._errorIndicator = this._result;
-         }
-         this.report('Area');
-       };
-       BufferResultValidator.prototype.checkPolygonal = function checkPolygonal () {
-         if (!(this._result instanceof Polygon || this._result instanceof MultiPolygon)) { this._isValid = false; }
-         this._errorMsg = 'Result is not polygonal';
-         this._errorIndicator = this._result;
-         this.report('Polygonal');
-       };
-       BufferResultValidator.prototype.getErrorIndicator = function getErrorIndicator () {
-         return this._errorIndicator
-       };
-       BufferResultValidator.prototype.getErrorLocation = function getErrorLocation () {
-         return this._errorLocation
-       };
-       BufferResultValidator.prototype.checkExpectedEmpty = function checkExpectedEmpty () {
-         if (this._input.getDimension() >= 2) { return null }
-         if (this._distance > 0.0) { return null }
-         if (!this._result.isEmpty()) {
-           this._isValid = false;
-           this._errorMsg = 'Result is non-empty';
-           this._errorIndicator = this._result;
-         }
-         this.report('ExpectedEmpty');
-       };
-       BufferResultValidator.prototype.report = function report (checkName) {
-         if (!BufferResultValidator.VERBOSE) { return null }
-         System.out.println('Check ' + checkName + ': ' + (this._isValid ? 'passed' : 'FAILED'));
-       };
-       BufferResultValidator.prototype.getErrorMessage = function getErrorMessage () {
-         return this._errorMsg
-       };
-       BufferResultValidator.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       BufferResultValidator.prototype.getClass = function getClass () {
-         return BufferResultValidator
-       };
-       BufferResultValidator.isValidMsg = function isValidMsg (g, distance, result) {
-         var validator = new BufferResultValidator(g, distance, result);
-         if (!validator.isValid()) { return validator.getErrorMessage() }
-         return null
-       };
-       BufferResultValidator.isValid = function isValid (g, distance, result) {
-         var validator = new BufferResultValidator(g, distance, result);
-         if (validator.isValid()) { return true }
-         return false
-       };
-       staticAccessors$40.VERBOSE.get = function () { return false };
-       staticAccessors$40.MAX_ENV_DIFF_FRAC.get = function () { return 0.012 };
+         var _privateStoreProps = {
+           _namespacePrefix: namespacePrefix,
+           _namespaceRegexp: namespaceRegexp,
+           _testStorage: function _testStorage(storage) {
+             try {
+               var testStr = '__storejs__test__';
+               storage.write(testStr, testStr);
+               var ok = storage.read(testStr) === testStr;
+               storage.remove(testStr);
+               return ok;
+             } catch (e) {
+               return false;
+             }
+           },
+           _assignPluginFnProp: function _assignPluginFnProp(pluginFnProp, propName) {
+             var oldFn = this[propName];

 
 

-       Object.defineProperties( BufferResultValidator, staticAccessors$40 );
+             this[propName] = function pluginFn() {
+               var args = slice(arguments, 0);
+               var self = this; // super_fn calls the old function which was overwritten by
+               // this mixin.

 
 

-       // operation.buffer
+               function super_fn() {
+                 if (!oldFn) {
+                   return;
+                 }

 
 

-       var BasicSegmentString = function BasicSegmentString () {
-         this._pts = null;
-         this._data = null;
-         var pts = arguments[0];
-         var data = arguments[1];
-         this._pts = pts;
-         this._data = data;
-       };
-       BasicSegmentString.prototype.getCoordinates = function getCoordinates () {
-         return this._pts
-       };
-       BasicSegmentString.prototype.size = function size () {
-         return this._pts.length
-       };
-       BasicSegmentString.prototype.getCoordinate = function getCoordinate (i) {
-         return this._pts[i]
-       };
-       BasicSegmentString.prototype.isClosed = function isClosed () {
-         return this._pts[0].equals(this._pts[this._pts.length - 1])
-       };
-       BasicSegmentString.prototype.getSegmentOctant = function getSegmentOctant (index) {
-         if (index === this._pts.length - 1) { return -1 }
-         return Octant.octant(this.getCoordinate(index), this.getCoordinate(index + 1))
-       };
-       BasicSegmentString.prototype.setData = function setData (data) {
-         this._data = data;
-       };
-       BasicSegmentString.prototype.getData = function getData () {
-         return this._data
-       };
-       BasicSegmentString.prototype.toString = function toString () {
-         return WKTWriter.toLineString(new CoordinateArraySequence(this._pts))
-       };
-       BasicSegmentString.prototype.interfaces_ = function interfaces_ () {
-         return [SegmentString]
-       };
-       BasicSegmentString.prototype.getClass = function getClass () {
-         return BasicSegmentString
-       };
+                 each$6(arguments, function (arg, i) {
+                   args[i] = arg;
+                 });
+                 return oldFn.apply(self, args);
+               } // Give mixing function access to super_fn by prefixing all mixin function
+               // arguments with super_fn.

 
 

-       var InteriorIntersectionFinder = function InteriorIntersectionFinder () {
-         this._findAllIntersections = false;
-         this._isCheckEndSegmentsOnly = false;
-         this._li = null;
-         this._interiorIntersection = null;
-         this._intSegments = null;
-         this._intersections = new ArrayList();
-         this._intersectionCount = 0;
-         this._keepIntersections = true;
-         var li = arguments[0];
-         this._li = li;
-         this._interiorIntersection = null;
-       };
-       InteriorIntersectionFinder.prototype.getInteriorIntersection = function getInteriorIntersection () {
-         return this._interiorIntersection
-       };
-       InteriorIntersectionFinder.prototype.setCheckEndSegmentsOnly = function setCheckEndSegmentsOnly (isCheckEndSegmentsOnly) {
-         this._isCheckEndSegmentsOnly = isCheckEndSegmentsOnly;
-       };
-       InteriorIntersectionFinder.prototype.getIntersectionSegments = function getIntersectionSegments () {
-         return this._intSegments
-       };
-       InteriorIntersectionFinder.prototype.count = function count () {
-         return this._intersectionCount
-       };
-       InteriorIntersectionFinder.prototype.getIntersections = function getIntersections () {
-         return this._intersections
-       };
-       InteriorIntersectionFinder.prototype.setFindAllIntersections = function setFindAllIntersections (findAllIntersections) {
-         this._findAllIntersections = findAllIntersections;
-       };
-       InteriorIntersectionFinder.prototype.setKeepIntersections = function setKeepIntersections (keepIntersections) {
-         this._keepIntersections = keepIntersections;
-       };
-       InteriorIntersectionFinder.prototype.processIntersections = function processIntersections (e0, segIndex0, e1, segIndex1) {
-         if (!this._findAllIntersections && this.hasIntersection()) { return null }
-         if (e0 === e1 && segIndex0 === segIndex1) { return null }
-         if (this._isCheckEndSegmentsOnly) {
-           var isEndSegPresent = this.isEndSegment(e0, segIndex0) || this.isEndSegment(e1, segIndex1);
-           if (!isEndSegPresent) { return null }
-         }
-         var p00 = e0.getCoordinates()[segIndex0];
-         var p01 = e0.getCoordinates()[segIndex0 + 1];
-         var p10 = e1.getCoordinates()[segIndex1];
-         var p11 = e1.getCoordinates()[segIndex1 + 1];
-         this._li.computeIntersection(p00, p01, p10, p11);
-         if (this._li.hasIntersection()) {
-           if (this._li.isInteriorIntersection()) {
-             this._intSegments = new Array(4).fill(null);
-             this._intSegments[0] = p00;
-             this._intSegments[1] = p01;
-             this._intSegments[2] = p10;
-             this._intSegments[3] = p11;
-             this._interiorIntersection = this._li.getIntersection(0);
-             if (this._keepIntersections) { this._intersections.add(this._interiorIntersection); }
-             this._intersectionCount++;
+
+               var newFnArgs = [super_fn].concat(args);
+               return pluginFnProp.apply(self, newFnArgs);
+             };
+           },
+           _serialize: function _serialize(obj) {
+             return JSON.stringify(obj);
+           },
+           _deserialize: function _deserialize(strVal, defaultVal) {
+             if (!strVal) {
+               return defaultVal;
+             } // It is possible that a raw string value has been previously stored
+             // in a storage without using store.js, meaning it will be a raw
+             // string value instead of a JSON serialized string. By defaulting
+             // to the raw string value in case of a JSON parse error, we allow
+             // for past stored values to be forwards-compatible with store.js
+
+
+             var val = '';
+
+             try {
+               val = JSON.parse(strVal);
+             } catch (e) {
+               val = strVal;
+             }
+
+             return val !== undefined ? val : defaultVal;
+           },
+           _addStorage: function _addStorage(storage) {
+             if (this.enabled) {
+               return;
+             }
+
+             if (this._testStorage(storage)) {
+               this.storage = storage;
+               this.enabled = true;
+             }
+           },
+           _addPlugin: function _addPlugin(plugin) {
+             var self = this; // If the plugin is an array, then add all plugins in the array.
+             // This allows for a plugin to depend on other plugins.
+
+             if (isList(plugin)) {
+               each$6(plugin, function (plugin) {
+                 self._addPlugin(plugin);
+               });
+               return;
+             } // Keep track of all plugins we've seen so far, so that we
+             // don't add any of them twice.
+
+
+             var seenPlugin = pluck(this.plugins, function (seenPlugin) {
+               return plugin === seenPlugin;
+             });
+
+             if (seenPlugin) {
+               return;
+             }
+
+             this.plugins.push(plugin); // Check that the plugin is properly formed
+
+             if (!isFunction(plugin)) {
+               throw new Error('Plugins must be function values that return objects');
+             }
+
+             var pluginProperties = plugin.call(this);
+
+             if (!isObject(pluginProperties)) {
+               throw new Error('Plugins must return an object of function properties');
+             } // Add the plugin function properties to this store instance.
+
+
+             each$6(pluginProperties, function (pluginFnProp, propName) {
+               if (!isFunction(pluginFnProp)) {
+                 throw new Error('Bad plugin property: ' + propName + ' from plugin ' + plugin.name + '. Plugins should only return functions.');
+               }
+
+               self._assignPluginFnProp(pluginFnProp, propName);
+             });
+           },
+           // Put deprecated properties in the private API, so as to not expose it to accidential
+           // discovery through inspection of the store object.
+           // Deprecated: addStorage
+           addStorage: function addStorage(storage) {
+             _warn('store.addStorage(storage) is deprecated. Use createStore([storages])');
+
+             this._addStorage(storage);

            }
            }

-         }
-       };
-       InteriorIntersectionFinder.prototype.isEndSegment = function isEndSegment (segStr, index) {
-         if (index === 0) { return true }
-         if (index >= segStr.size() - 2) { return true }
-         return false
-       };
-       InteriorIntersectionFinder.prototype.hasIntersection = function hasIntersection () {
-         return this._interiorIntersection !== null
-       };
-       InteriorIntersectionFinder.prototype.isDone = function isDone () {
-         if (this._findAllIntersections) { return false }
-         return this._interiorIntersection !== null
-       };
-       InteriorIntersectionFinder.prototype.interfaces_ = function interfaces_ () {
-         return [SegmentIntersector]
-       };
-       InteriorIntersectionFinder.prototype.getClass = function getClass () {
-         return InteriorIntersectionFinder
-       };
-       InteriorIntersectionFinder.createAllIntersectionsFinder = function createAllIntersectionsFinder (li) {
-         var finder = new InteriorIntersectionFinder(li);
-         finder.setFindAllIntersections(true);
-         return finder
-       };
-       InteriorIntersectionFinder.createAnyIntersectionFinder = function createAnyIntersectionFinder (li) {
-         return new InteriorIntersectionFinder(li)
-       };
-       InteriorIntersectionFinder.createIntersectionCounter = function createIntersectionCounter (li) {
-         var finder = new InteriorIntersectionFinder(li);
-         finder.setFindAllIntersections(true);
-         finder.setKeepIntersections(false);
-         return finder
-       };
+         };
+         var store = create(_privateStoreProps, storeAPI, {
+           plugins: []
+         });
+         store.raw = {};
+         each$6(store, function (prop, propName) {
+           if (isFunction(prop)) {
+             store.raw[propName] = bind(store, prop);
+           }
+         });
+         each$6(storages, function (storage) {
+           store._addStorage(storage);
+         });
+         each$6(plugins, function (plugin) {
+           store._addPlugin(plugin);
+         });
+         return store;
+       }

 
 

-       var FastNodingValidator = function FastNodingValidator () {
-         this._li = new RobustLineIntersector();
-         this._segStrings = null;
-         this._findAllIntersections = false;
-         this._segInt = null;
-         this._isValid = true;
-         var segStrings = arguments[0];
-         this._segStrings = segStrings;
-       };
-       FastNodingValidator.prototype.execute = function execute () {
-         if (this._segInt !== null) { return null }
-         this.checkInteriorIntersections();
-       };
-       FastNodingValidator.prototype.getIntersections = function getIntersections () {
-         return this._segInt.getIntersections()
-       };
-       FastNodingValidator.prototype.isValid = function isValid () {
-         this.execute();
-         return this._isValid
-       };
-       FastNodingValidator.prototype.setFindAllIntersections = function setFindAllIntersections (findAllIntersections) {
-         this._findAllIntersections = findAllIntersections;
+       var util$4 = util$6;
+       var Global$4 = util$4.Global;
+       var localStorage_1 = {
+         name: 'localStorage',
+         read: read$5,
+         write: write$5,
+         each: each$5,
+         remove: remove$5,
+         clearAll: clearAll$5

        };
        };

-       FastNodingValidator.prototype.checkInteriorIntersections = function checkInteriorIntersections () {
-         this._isValid = true;
-         this._segInt = new InteriorIntersectionFinder(this._li);
-         this._segInt.setFindAllIntersections(this._findAllIntersections);
-         var noder = new MCIndexNoder();
-         noder.setSegmentIntersector(this._segInt);
-         noder.computeNodes(this._segStrings);
-         if (this._segInt.hasIntersection()) {
-           this._isValid = false;
-           return null
+
+       function localStorage$1() {
+         return Global$4.localStorage;
+       }
+
+       function read$5(key) {
+         return localStorage$1().getItem(key);
+       }
+
+       function write$5(key, data) {
+         return localStorage$1().setItem(key, data);
+       }
+
+       function each$5(fn) {
+         for (var i = localStorage$1().length - 1; i >= 0; i--) {
+           var key = localStorage$1().key(i);
+           fn(read$5(key), key);

          }
          }

-       };
-       FastNodingValidator.prototype.checkValid = function checkValid () {
-         this.execute();
-         if (!this._isValid) { throw new TopologyException(this.getErrorMessage(), this._segInt.getInteriorIntersection()) }
-       };
-       FastNodingValidator.prototype.getErrorMessage = function getErrorMessage () {
-         if (this._isValid) { return 'no intersections found' }
-         var intSegs = this._segInt.getIntersectionSegments();
-         return 'found non-noded intersection between ' + WKTWriter.toLineString(intSegs[0], intSegs[1]) + ' and ' + WKTWriter.toLineString(intSegs[2], intSegs[3])
-       };
-       FastNodingValidator.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       FastNodingValidator.prototype.getClass = function getClass () {
-         return FastNodingValidator
-       };
-       FastNodingValidator.computeIntersections = function computeIntersections (segStrings) {
-         var nv = new FastNodingValidator(segStrings);
-         nv.setFindAllIntersections(true);
-         nv.isValid();
-         return nv.getIntersections()
-       };
+       }

 
 

-       var EdgeNodingValidator = function EdgeNodingValidator () {
-         this._nv = null;
-         var edges = arguments[0];
-         this._nv = new FastNodingValidator(EdgeNodingValidator.toSegmentStrings(edges));
-       };
-       EdgeNodingValidator.prototype.checkValid = function checkValid () {
-         this._nv.checkValid();
-       };
-       EdgeNodingValidator.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       EdgeNodingValidator.prototype.getClass = function getClass () {
-         return EdgeNodingValidator
+       function remove$5(key) {
+         return localStorage$1().removeItem(key);
+       }
+
+       function clearAll$5() {
+         return localStorage$1().clear();
+       }
+
+       // versions 6 and 7, where no localStorage, etc
+       // is available.
+
+       var util$3 = util$6;
+       var Global$3 = util$3.Global;
+       var oldFFGlobalStorage = {
+         name: 'oldFF-globalStorage',
+         read: read$4,
+         write: write$4,
+         each: each$4,
+         remove: remove$4,
+         clearAll: clearAll$4

        };
        };

-       EdgeNodingValidator.toSegmentStrings = function toSegmentStrings (edges) {
-         var segStrings = new ArrayList();
-         for (var i = edges.iterator(); i.hasNext();) {
-           var e = i.next();
-           segStrings.add(new BasicSegmentString(e.getCoordinates(), e));
+       var globalStorage = Global$3.globalStorage;
+
+       function read$4(key) {
+         return globalStorage[key];
+       }
+
+       function write$4(key, data) {
+         globalStorage[key] = data;
+       }
+
+       function each$4(fn) {
+         for (var i = globalStorage.length - 1; i >= 0; i--) {
+           var key = globalStorage.key(i);
+           fn(globalStorage[key], key);

          }
          }

-         return segStrings
-       };
-       EdgeNodingValidator.checkValid = function checkValid (edges) {
-         var validator = new EdgeNodingValidator(edges);
-         validator.checkValid();
-       };
+       }
+
+       function remove$4(key) {
+         return globalStorage.removeItem(key);
+       }
+
+       function clearAll$4() {
+         each$4(function (key, _) {
+           delete globalStorage[key];
+         });
+       }
+
+       // versions 6 and 7, where no localStorage, sessionStorage, etc
+       // is available.

 
 

-       var GeometryCollectionMapper = function GeometryCollectionMapper (mapOp) {
-         this._mapOp = mapOp;
+       var util$2 = util$6;
+       var Global$2 = util$2.Global;
+       var oldIEUserDataStorage = {
+         name: 'oldIE-userDataStorage',
+         write: write$3,
+         read: read$3,
+         each: each$3,
+         remove: remove$3,
+         clearAll: clearAll$3

        };
        };

-       GeometryCollectionMapper.prototype.map = function map (gc) {
-           var this$1 = this;
+       var storageName = 'storejs';
+       var doc$1 = Global$2.document;
+
+       var _withStorageEl = _makeIEStorageElFunction();
+
+       var disable = (Global$2.navigator ? Global$2.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x

 
 

-         var mapped = new ArrayList();
-         for (var i = 0; i < gc.getNumGeometries(); i++) {
-           var g = this$1._mapOp.map(gc.getGeometryN(i));
-           if (!g.isEmpty()) { mapped.add(g); }
+       function write$3(unfixedKey, data) {
+         if (disable) {
+           return;

          }
          }

-         return gc.getFactory().createGeometryCollection(GeometryFactory.toGeometryArray(mapped))
-       };
-       GeometryCollectionMapper.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       GeometryCollectionMapper.prototype.getClass = function getClass () {
-         return GeometryCollectionMapper
-       };
-       GeometryCollectionMapper.map = function map (gc, op) {
-         var mapper = new GeometryCollectionMapper(op);
-         return mapper.map(gc)
-       };

 
 

-       var LineBuilder = function LineBuilder () {
-         this._op = null;
-         this._geometryFactory = null;
-         this._ptLocator = null;
-         this._lineEdgesList = new ArrayList();
-         this._resultLineList = new ArrayList();
-         var op = arguments[0];
-         var geometryFactory = arguments[1];
-         var ptLocator = arguments[2];
-         this._op = op;
-         this._geometryFactory = geometryFactory;
-         this._ptLocator = ptLocator;
-       };
-       LineBuilder.prototype.collectLines = function collectLines (opCode) {
-           var this$1 = this;
+         var fixedKey = fixKey(unfixedKey);

 
 

-         for (var it = this._op.getGraph().getEdgeEnds().iterator(); it.hasNext();) {
-           var de = it.next();
-           this$1.collectLineEdge(de, opCode, this$1._lineEdgesList);
-           this$1.collectBoundaryTouchEdge(de, opCode, this$1._lineEdgesList);
+         _withStorageEl(function (storageEl) {
+           storageEl.setAttribute(fixedKey, data);
+           storageEl.save(storageName);
+         });
+       }
+
+       function read$3(unfixedKey) {
+         if (disable) {
+           return;

          }
          }

-       };
-       LineBuilder.prototype.labelIsolatedLine = function labelIsolatedLine (e, targetIndex) {
-         var loc = this._ptLocator.locate(e.getCoordinate(), this._op.getArgGeometry(targetIndex));
-         e.getLabel().setLocation(targetIndex, loc);
-       };
-       LineBuilder.prototype.build = function build (opCode) {
-         this.findCoveredLineEdges();
-         this.collectLines(opCode);
-         this.buildLines(opCode);
-         return this._resultLineList
-       };
-       LineBuilder.prototype.collectLineEdge = function collectLineEdge (de, opCode, edges) {
-         var label = de.getLabel();
-         var e = de.getEdge();
-         if (de.isLineEdge()) {
-           if (!de.isVisited() && OverlayOp.isResultOfOp(label, opCode) && !e.isCovered()) {
-             edges.add(e);
-             de.setVisitedEdge(true);
+
+         var fixedKey = fixKey(unfixedKey);
+         var res = null;
+
+         _withStorageEl(function (storageEl) {
+           res = storageEl.getAttribute(fixedKey);
+         });
+
+         return res;
+       }
+
+       function each$3(callback) {
+         _withStorageEl(function (storageEl) {
+           var attributes = storageEl.XMLDocument.documentElement.attributes;
+
+           for (var i = attributes.length - 1; i >= 0; i--) {
+             var attr = attributes[i];
+             callback(storageEl.getAttribute(attr.name), attr.name);

            }
            }

-         }
-       };
-       LineBuilder.prototype.findCoveredLineEdges = function findCoveredLineEdges () {
-           var this$1 = this;
+         });
+       }
+
+       function remove$3(unfixedKey) {
+         var fixedKey = fixKey(unfixedKey);
+
+         _withStorageEl(function (storageEl) {
+           storageEl.removeAttribute(fixedKey);
+           storageEl.save(storageName);
+         });
+       }
+
+       function clearAll$3() {
+         _withStorageEl(function (storageEl) {
+           var attributes = storageEl.XMLDocument.documentElement.attributes;
+           storageEl.load(storageName);

 
 

-         for (var nodeit = this._op.getGraph().getNodes().iterator(); nodeit.hasNext();) {
-           var node = nodeit.next();
-           node.getEdges().findCoveredLineEdges();
-         }
-         for (var it = this._op.getGraph().getEdgeEnds().iterator(); it.hasNext();) {
-           var de = it.next();
-           var e = de.getEdge();
-           if (de.isLineEdge() && !e.isCoveredSet()) {
-             var isCovered = this$1._op.isCoveredByA(de.getCoordinate());
-             e.setCovered(isCovered);
+           for (var i = attributes.length - 1; i >= 0; i--) {
+             storageEl.removeAttribute(attributes[i].name);

            }
            }

-         }
-       };
-       LineBuilder.prototype.labelIsolatedLines = function labelIsolatedLines (edgesList) {
-           var this$1 = this;

 
 

-         for (var it = edgesList.iterator(); it.hasNext();) {
-           var e = it.next();
-           var label = e.getLabel();
-           if (e.isIsolated()) {
-             if (label.isNull(0)) { this$1.labelIsolatedLine(e, 0); } else { this$1.labelIsolatedLine(e, 1); }
-           }
-         }
-       };
-       LineBuilder.prototype.buildLines = function buildLines (opCode) {
-           var this$1 = this;
+           storageEl.save(storageName);
+         });
+       } // Helpers
+       //////////
+       // In IE7, keys cannot start with a digit or contain certain chars.
+       // See https://github.com/marcuswestin/store.js/issues/40
+       // See https://github.com/marcuswestin/store.js/issues/83

 
 

-         for (var it = this._lineEdgesList.iterator(); it.hasNext();) {
-           var e = it.next();
-           // const label = e.getLabel()
-           var line = this$1._geometryFactory.createLineString(e.getCoordinates());
-           this$1._resultLineList.add(line);
-           e.setInResult(true);
-         }
-       };
-       LineBuilder.prototype.collectBoundaryTouchEdge = function collectBoundaryTouchEdge (de, opCode, edges) {
-         var label = de.getLabel();
-         if (de.isLineEdge()) { return null }
-         if (de.isVisited()) { return null }
-         if (de.isInteriorAreaEdge()) { return null }
-         if (de.getEdge().isInResult()) { return null }
-         Assert.isTrue(!(de.isInResult() || de.getSym().isInResult()) || !de.getEdge().isInResult());
-         if (OverlayOp.isResultOfOp(label, opCode) && opCode === OverlayOp.INTERSECTION) {
-           edges.add(de.getEdge());
-           de.setVisitedEdge(true);
-         }
-       };
-       LineBuilder.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       LineBuilder.prototype.getClass = function getClass () {
-         return LineBuilder
-       };

 
 

-       var PointBuilder = function PointBuilder () {
-         this._op = null;
-         this._geometryFactory = null;
-         this._resultPointList = new ArrayList();
-         var op = arguments[0];
-         var geometryFactory = arguments[1];
-         // const ptLocator = arguments[2]
-         this._op = op;
-         this._geometryFactory = geometryFactory;
-       };
-       PointBuilder.prototype.filterCoveredNodeToPoint = function filterCoveredNodeToPoint (n) {
-         var coord = n.getCoordinate();
-         if (!this._op.isCoveredByLA(coord)) {
-           var pt = this._geometryFactory.createPoint(coord);
-           this._resultPointList.add(pt);
-         }
-       };
-       PointBuilder.prototype.extractNonCoveredResultNodes = function extractNonCoveredResultNodes (opCode) {
-           var this$1 = this;
+       var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");

 
 

-         for (var nodeit = this._op.getGraph().getNodes().iterator(); nodeit.hasNext();) {
-           var n = nodeit.next();
-           if (n.isInResult()) { continue }
-           if (n.isIncidentEdgeInResult()) { continue }
-           if (n.getEdges().getDegree() === 0 || opCode === OverlayOp.INTERSECTION) {
-             var label = n.getLabel();
-             if (OverlayOp.isResultOfOp(label, opCode)) {
-               this$1.filterCoveredNodeToPoint(n);
-             }
-           }
-         }
-       };
-       PointBuilder.prototype.build = function build (opCode) {
-         this.extractNonCoveredResultNodes(opCode);
-         return this._resultPointList
-       };
-       PointBuilder.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       PointBuilder.prototype.getClass = function getClass () {
-         return PointBuilder
-       };
+       function fixKey(key) {
+         return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
+       }

 
 

-       var GeometryTransformer = function GeometryTransformer () {
-         this._inputGeom = null;
-         this._factory = null;
-         this._pruneEmptyGeometry = true;
-         this._preserveGeometryCollectionType = true;
-         this._preserveCollections = false;
-         this._preserveType = false;
-       };
-       GeometryTransformer.prototype.transformPoint = function transformPoint (geom, parent) {
-         return this._factory.createPoint(this.transformCoordinates(geom.getCoordinateSequence(), geom))
-       };
-       GeometryTransformer.prototype.transformPolygon = function transformPolygon (geom, parent) {
-           var this$1 = this;
-
-         var isAllValidLinearRings = true;
-         var shell = this.transformLinearRing(geom.getExteriorRing(), geom);
-         if (shell === null || !(shell instanceof LinearRing) || shell.isEmpty()) { isAllValidLinearRings = false; }
-         var holes = new ArrayList();
-         for (var i = 0; i < geom.getNumInteriorRing(); i++) {
-           var hole = this$1.transformLinearRing(geom.getInteriorRingN(i), geom);
-           if (hole === null || hole.isEmpty()) {
-             continue
-           }
-           if (!(hole instanceof LinearRing)) { isAllValidLinearRings = false; }
-           holes.add(hole);
-         }
-         if (isAllValidLinearRings) { return this._factory.createPolygon(shell, holes.toArray([])); } else {
-           var components = new ArrayList();
-           if (shell !== null) { components.add(shell); }
-           components.addAll(holes);
-           return this._factory.buildGeometry(components)
+       function _makeIEStorageElFunction() {
+         if (!doc$1 || !doc$1.documentElement || !doc$1.documentElement.addBehavior) {
+           return null;

          }
          }

-       };
-       GeometryTransformer.prototype.createCoordinateSequence = function createCoordinateSequence (coords) {
-         return this._factory.getCoordinateSequenceFactory().create(coords)
-       };
-       GeometryTransformer.prototype.getInputGeometry = function getInputGeometry () {
-         return this._inputGeom
-       };
-       GeometryTransformer.prototype.transformMultiLineString = function transformMultiLineString (geom, parent) {
-           var this$1 = this;

 
 

-         var transGeomList = new ArrayList();
-         for (var i = 0; i < geom.getNumGeometries(); i++) {
-           var transformGeom = this$1.transformLineString(geom.getGeometryN(i), geom);
-           if (transformGeom === null) { continue }
-           if (transformGeom.isEmpty()) { continue }
-           transGeomList.add(transformGeom);
-         }
-         return this._factory.buildGeometry(transGeomList)
-       };
-       GeometryTransformer.prototype.transformCoordinates = function transformCoordinates (coords, parent) {
-         return this.copy(coords)
-       };
-       GeometryTransformer.prototype.transformLineString = function transformLineString (geom, parent) {
-         return this._factory.createLineString(this.transformCoordinates(geom.getCoordinateSequence(), geom))
-       };
-       GeometryTransformer.prototype.transformMultiPoint = function transformMultiPoint (geom, parent) {
-           var this$1 = this;
+         var scriptTag = 'script',
+             storageOwner,
+             storageContainer,
+             storageEl; // Since #userData storage applies only to specific paths, we need to
+         // somehow link our data to a specific path.  We choose /favicon.ico
+         // as a pretty safe option, since all browsers already make a request to
+         // this URL anyway and being a 404 will not hurt us here.  We wrap an
+         // iframe pointing to the favicon in an ActiveXObject(htmlfile) object
+         // (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
+         // since the iframe access rules appear to allow direct access and
+         // manipulation of the document element, even for a 404 page.  This
+         // document can be used instead of the current document (which would
+         // have been limited to the current path) to perform #userData storage.

 
 

-         var transGeomList = new ArrayList();
-         for (var i = 0; i < geom.getNumGeometries(); i++) {
-           var transformGeom = this$1.transformPoint(geom.getGeometryN(i), geom);
-           if (transformGeom === null) { continue }
-           if (transformGeom.isEmpty()) { continue }
-           transGeomList.add(transformGeom);
-         }
-         return this._factory.buildGeometry(transGeomList)
-       };
-       GeometryTransformer.prototype.transformMultiPolygon = function transformMultiPolygon (geom, parent) {
-           var this$1 = this;
+         try {
+           /* global ActiveXObject */
+           storageContainer = new ActiveXObject('htmlfile');
+           storageContainer.open();
+           storageContainer.write('<' + scriptTag + '>document.w=window</' + scriptTag + '><iframe src="/favicon.ico"></iframe>');
+           storageContainer.close();
+           storageOwner = storageContainer.w.frames[0].document;
+           storageEl = storageOwner.createElement('div');
+         } catch (e) {
+           // somehow ActiveXObject instantiation failed (perhaps some special
+           // security settings or otherwse), fall back to per-path storage
+           storageEl = doc$1.createElement('div');
+           storageOwner = doc$1.body;
+         }
+
+         return function (storeFunction) {
+           var args = [].slice.call(arguments, 0);
+           args.unshift(storageEl); // See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
+           // and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
+
+           storageOwner.appendChild(storageEl);
+           storageEl.addBehavior('#default#userData');
+           storageEl.load(storageName);
+           storeFunction.apply(this, args);
+           storageOwner.removeChild(storageEl);
+           return;
+         };
+       }

 
 

-         var transGeomList = new ArrayList();
-         for (var i = 0; i < geom.getNumGeometries(); i++) {
-           var transformGeom = this$1.transformPolygon(geom.getGeometryN(i), geom);
-           if (transformGeom === null) { continue }
-           if (transformGeom.isEmpty()) { continue }
-           transGeomList.add(transformGeom);
-         }
-         return this._factory.buildGeometry(transGeomList)
-       };
-       GeometryTransformer.prototype.copy = function copy (seq) {
-         return seq.copy()
-       };
-       GeometryTransformer.prototype.transformGeometryCollection = function transformGeometryCollection (geom, parent) {
-           var this$1 = this;
-
-         var transGeomList = new ArrayList();
-         for (var i = 0; i < geom.getNumGeometries(); i++) {
-           var transformGeom = this$1.transform(geom.getGeometryN(i));
-           if (transformGeom === null) { continue }
-           if (this$1._pruneEmptyGeometry && transformGeom.isEmpty()) { continue }
-           transGeomList.add(transformGeom);
-         }
-         if (this._preserveGeometryCollectionType) { return this._factory.createGeometryCollection(GeometryFactory.toGeometryArray(transGeomList)) }
-         return this._factory.buildGeometry(transGeomList)
-       };
-       GeometryTransformer.prototype.transform = function transform (inputGeom) {
-         this._inputGeom = inputGeom;
-         this._factory = inputGeom.getFactory();
-         if (inputGeom instanceof Point$1) { return this.transformPoint(inputGeom, null) }
-         if (inputGeom instanceof MultiPoint) { return this.transformMultiPoint(inputGeom, null) }
-         if (inputGeom instanceof LinearRing) { return this.transformLinearRing(inputGeom, null) }
-         if (inputGeom instanceof LineString) { return this.transformLineString(inputGeom, null) }
-         if (inputGeom instanceof MultiLineString) { return this.transformMultiLineString(inputGeom, null) }
-         if (inputGeom instanceof Polygon) { return this.transformPolygon(inputGeom, null) }
-         if (inputGeom instanceof MultiPolygon) { return this.transformMultiPolygon(inputGeom, null) }
-         if (inputGeom instanceof GeometryCollection) { return this.transformGeometryCollection(inputGeom, null) }
-         throw new IllegalArgumentException('Unknown Geometry subtype: ' + inputGeom.getClass().getName())
-       };
-       GeometryTransformer.prototype.transformLinearRing = function transformLinearRing (geom, parent) {
-         var seq = this.transformCoordinates(geom.getCoordinateSequence(), geom);
-         if (seq === null) { return this._factory.createLinearRing(null) }
-         var seqSize = seq.size();
-         if (seqSize > 0 && seqSize < 4 && !this._preserveType) { return this._factory.createLineString(seq) }
-         return this._factory.createLinearRing(seq)
-       };
-       GeometryTransformer.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       GeometryTransformer.prototype.getClass = function getClass () {
-         return GeometryTransformer
-       };
+       // doesn't work but cookies do. This implementation is adopted from
+       // https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage

 
 

-       var LineStringSnapper = function LineStringSnapper () {
-         this._snapTolerance = 0.0;
-         this._srcPts = null;
-         this._seg = new LineSegment();
-         this._allowSnappingToSourceVertices = false;
-         this._isClosed = false;
-         if (arguments[0] instanceof LineString && typeof arguments[1] === 'number') {
-           var srcLine = arguments[0];
-           var snapTolerance = arguments[1];
-           LineStringSnapper.call(this, srcLine.getCoordinates(), snapTolerance);
-         } else if (arguments[0] instanceof Array && typeof arguments[1] === 'number') {
-           var srcPts = arguments[0];
-           var snapTolerance$1 = arguments[1];
-           this._srcPts = srcPts;
-           this._isClosed = LineStringSnapper.isClosed(srcPts);
-           this._snapTolerance = snapTolerance$1;
-         }
+       var util$1 = util$6;
+       var Global$1 = util$1.Global;
+       var trim = util$1.trim;
+       var cookieStorage = {
+         name: 'cookieStorage',
+         read: read$2,
+         write: write$2,
+         each: each$2,
+         remove: remove$2,
+         clearAll: clearAll$2

        };
        };

-       LineStringSnapper.prototype.snapVertices = function snapVertices (srcCoords, snapPts) {
-           var this$1 = this;
+       var doc = Global$1.document;

 
 

-         var end = this._isClosed ? srcCoords.size() - 1 : srcCoords.size();
-         for (var i = 0; i < end; i++) {
-           var srcPt = srcCoords.get(i);
-           var snapVert = this$1.findSnapForVertex(srcPt, snapPts);
-           if (snapVert !== null) {
-             srcCoords.set(i, new Coordinate(snapVert));
-             if (i === 0 && this$1._isClosed) { srcCoords.set(srcCoords.size() - 1, new Coordinate(snapVert)); }
-           }
+       function read$2(key) {
+         if (!key || !_has(key)) {
+           return null;

          }
          }

-       };
-       LineStringSnapper.prototype.findSnapForVertex = function findSnapForVertex (pt, snapPts) {
-           var this$1 = this;

 
 

-         for (var i = 0; i < snapPts.length; i++) {
-           if (pt.equals2D(snapPts[i])) { return null }
-           if (pt.distance(snapPts[i]) < this$1._snapTolerance) { return snapPts[i] }
-         }
-         return null
-       };
-       LineStringSnapper.prototype.snapTo = function snapTo (snapPts) {
-         var coordList = new CoordinateList(this._srcPts);
-         this.snapVertices(coordList, snapPts);
-         this.snapSegments(coordList, snapPts);
-         var newPts = coordList.toCoordinateArray();
-         return newPts
-       };
-       LineStringSnapper.prototype.snapSegments = function snapSegments (srcCoords, snapPts) {
-           var this$1 = this;
+         var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
+         return unescape(doc.cookie.replace(new RegExp(regexpStr), "$1"));
+       }

 
 

-         if (snapPts.length === 0) { return null }
-         var distinctPtCount = snapPts.length;
-         if (snapPts[0].equals2D(snapPts[snapPts.length - 1])) { distinctPtCount = snapPts.length - 1; }
-         for (var i = 0; i < distinctPtCount; i++) {
-           var snapPt = snapPts[i];
-           var index = this$1.findSegmentIndexToSnap(snapPt, srcCoords);
-           if (index >= 0) {
-             srcCoords.add(index + 1, new Coordinate(snapPt), false);
-           }
-         }
-       };
-       LineStringSnapper.prototype.findSegmentIndexToSnap = function findSegmentIndexToSnap (snapPt, srcCoords) {
-           var this$1 = this;
+       function each$2(callback) {
+         var cookies = doc.cookie.split(/; ?/g);

 
 

-         var minDist = Double.MAX_VALUE;
-         var snapIndex = -1;
-         for (var i = 0; i < srcCoords.size() - 1; i++) {
-           this$1._seg.p0 = srcCoords.get(i);
-           this$1._seg.p1 = srcCoords.get(i + 1);
-           if (this$1._seg.p0.equals2D(snapPt) || this$1._seg.p1.equals2D(snapPt)) {
-             if (this$1._allowSnappingToSourceVertices) { continue; } else { return -1 }
+         for (var i = cookies.length - 1; i >= 0; i--) {
+           if (!trim(cookies[i])) {
+             continue;

            }
            }

-           var dist = this$1._seg.distance(snapPt);
-           if (dist < this$1._snapTolerance && dist < minDist) {
-             minDist = dist;
-             snapIndex = i;
-           }
-         }
-         return snapIndex
-       };
-       LineStringSnapper.prototype.setAllowSnappingToSourceVertices = function setAllowSnappingToSourceVertices (allowSnappingToSourceVertices) {
-         this._allowSnappingToSourceVertices = allowSnappingToSourceVertices;
-       };
-       LineStringSnapper.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       LineStringSnapper.prototype.getClass = function getClass () {
-         return LineStringSnapper
-       };
-       LineStringSnapper.isClosed = function isClosed (pts) {
-         if (pts.length <= 1) { return false }
-         return pts[0].equals2D(pts[pts.length - 1])
-       };
-
-       var GeometrySnapper = function GeometrySnapper (srcGeom) {
-         this._srcGeom = srcGeom || null;
-       };

 
 

-       var staticAccessors$41 = { SNAP_PRECISION_FACTOR: { configurable: true } };
-       GeometrySnapper.prototype.snapTo = function snapTo (snapGeom, snapTolerance) {
-         var snapPts = this.extractTargetCoordinates(snapGeom);
-         var snapTrans = new SnapTransformer(snapTolerance, snapPts);
-         return snapTrans.transform(this._srcGeom)
-       };
-       GeometrySnapper.prototype.snapToSelf = function snapToSelf (snapTolerance, cleanResult) {
-         var snapPts = this.extractTargetCoordinates(this._srcGeom);
-         var snapTrans = new SnapTransformer(snapTolerance, snapPts, true);
-         var snappedGeom = snapTrans.transform(this._srcGeom);
-         var result = snappedGeom;
-         if (cleanResult && hasInterface(result, Polygonal)) {
-           result = snappedGeom.buffer(0);
-         }
-         return result
-       };
-       GeometrySnapper.prototype.computeSnapTolerance = function computeSnapTolerance (ringPts) {
-         var minSegLen = this.computeMinimumSegmentLength(ringPts);
-         var snapTol = minSegLen / 10;
-         return snapTol
-       };
-       GeometrySnapper.prototype.extractTargetCoordinates = function extractTargetCoordinates (g) {
-         var ptSet = new TreeSet();
-         var pts = g.getCoordinates();
-         for (var i = 0; i < pts.length; i++) {
-           ptSet.add(pts[i]);
-         }
-         return ptSet.toArray(new Array(0).fill(null))
-       };
-       GeometrySnapper.prototype.computeMinimumSegmentLength = function computeMinimumSegmentLength (pts) {
-         var minSegLen = Double.MAX_VALUE;
-         for (var i = 0; i < pts.length - 1; i++) {
-           var segLen = pts[i].distance(pts[i + 1]);
-           if (segLen < minSegLen) { minSegLen = segLen; }
+           var kvp = cookies[i].split('=');
+           var key = unescape(kvp[0]);
+           var val = unescape(kvp[1]);
+           callback(val, key);

          }
          }

-         return minSegLen
-       };
-       GeometrySnapper.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       GeometrySnapper.prototype.getClass = function getClass () {
-         return GeometrySnapper
-       };
-       GeometrySnapper.snap = function snap (g0, g1, snapTolerance) {
-         var snapGeom = new Array(2).fill(null);
-         var snapper0 = new GeometrySnapper(g0);
-         snapGeom[0] = snapper0.snapTo(g1, snapTolerance);
-         var snapper1 = new GeometrySnapper(g1);
-         snapGeom[1] = snapper1.snapTo(snapGeom[0], snapTolerance);
-         return snapGeom
-       };
-       GeometrySnapper.computeOverlaySnapTolerance = function computeOverlaySnapTolerance () {
-         if (arguments.length === 1) {
-           var g = arguments[0];
-           var snapTolerance = GeometrySnapper.computeSizeBasedSnapTolerance(g);
-           var pm = g.getPrecisionModel();
-           if (pm.getType() === PrecisionModel.FIXED) {
-             var fixedSnapTol = 1 / pm.getScale() * 2 / 1.415;
-             if (fixedSnapTol > snapTolerance) { snapTolerance = fixedSnapTol; }
-           }
-           return snapTolerance
-         } else if (arguments.length === 2) {
-           var g0 = arguments[0];
-           var g1 = arguments[1];
-           return Math.min(GeometrySnapper.computeOverlaySnapTolerance(g0), GeometrySnapper.computeOverlaySnapTolerance(g1))
+       }
+
+       function write$2(key, data) {
+         if (!key) {
+           return;

          }
          }

-       };
-       GeometrySnapper.computeSizeBasedSnapTolerance = function computeSizeBasedSnapTolerance (g) {
-         var env = g.getEnvelopeInternal();
-         var minDimension = Math.min(env.getHeight(), env.getWidth());
-         var snapTol = minDimension * GeometrySnapper.SNAP_PRECISION_FACTOR;
-         return snapTol
-       };
-       GeometrySnapper.snapToSelf = function snapToSelf (geom, snapTolerance, cleanResult) {
-         var snapper0 = new GeometrySnapper(geom);
-         return snapper0.snapToSelf(snapTolerance, cleanResult)
-       };
-       staticAccessors$41.SNAP_PRECISION_FACTOR.get = function () { return 1e-9 };

 
 

-       Object.defineProperties( GeometrySnapper, staticAccessors$41 );
+         doc.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
+       }

 
 

-       var SnapTransformer = (function (GeometryTransformer$$1) {
-         function SnapTransformer (snapTolerance, snapPts, isSelfSnap) {
-           GeometryTransformer$$1.call(this);
-           this._snapTolerance = snapTolerance || null;
-           this._snapPts = snapPts || null;
-           this._isSelfSnap = (isSelfSnap !== undefined) ? isSelfSnap : false;
+       function remove$2(key) {
+         if (!key || !_has(key)) {
+           return;

          }
 
          }
 

-         if ( GeometryTransformer$$1 ) { SnapTransformer.__proto__ = GeometryTransformer$$1; }
-         SnapTransformer.prototype = Object.create( GeometryTransformer$$1 && GeometryTransformer$$1.prototype );
-         SnapTransformer.prototype.constructor = SnapTransformer;
-         SnapTransformer.prototype.snapLine = function snapLine (srcPts, snapPts) {
-           var snapper = new LineStringSnapper(srcPts, this._snapTolerance);
-           snapper.setAllowSnappingToSourceVertices(this._isSelfSnap);
-           return snapper.snapTo(snapPts)
-         };
-         SnapTransformer.prototype.transformCoordinates = function transformCoordinates (coords, parent) {
-           var srcPts = coords.toCoordinateArray();
-           var newPts = this.snapLine(srcPts, this._snapPts);
-           return this._factory.getCoordinateSequenceFactory().create(newPts)
-         };
-         SnapTransformer.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         SnapTransformer.prototype.getClass = function getClass () {
-           return SnapTransformer
-         };
+         doc.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
+       }

 
 

-         return SnapTransformer;
-       }(GeometryTransformer));
+       function clearAll$2() {
+         each$2(function (_, key) {
+           remove$2(key);
+         });
+       }

 
 

-       var CommonBits = function CommonBits () {
-         this._isFirst = true;
-         this._commonMantissaBitsCount = 53;
-         this._commonBits = 0;
-         this._commonSignExp = null;
-       };
-       CommonBits.prototype.getCommon = function getCommon () {
-         return Double.longBitsToDouble(this._commonBits)
-       };
-       CommonBits.prototype.add = function add (num) {
-         var numBits = Double.doubleToLongBits(num);
-         if (this._isFirst) {
-           this._commonBits = numBits;
-           this._commonSignExp = CommonBits.signExpBits(this._commonBits);
-           this._isFirst = false;
-           return null
-         }
-         var numSignExp = CommonBits.signExpBits(numBits);
-         if (numSignExp !== this._commonSignExp) {
-           this._commonBits = 0;
-           return null
-         }
-         this._commonMantissaBitsCount = CommonBits.numCommonMostSigMantissaBits(this._commonBits, numBits);
-         this._commonBits = CommonBits.zeroLowerBits(this._commonBits, 64 - (12 + this._commonMantissaBitsCount));
-       };
-       CommonBits.prototype.toString = function toString () {
-         if (arguments.length === 1) {
-           var bits = arguments[0];
-           var x = Double.longBitsToDouble(bits);
-           var numStr = Double.toBinaryString(bits);
-           var padStr = '0000000000000000000000000000000000000000000000000000000000000000' + numStr;
-           var bitStr = padStr.substring(padStr.length - 64);
-           var str = bitStr.substring(0, 1) + '  ' + bitStr.substring(1, 12) + '(exp) ' + bitStr.substring(12) + ' [ ' + x + ' ]';
-           return str
-         }
-       };
-       CommonBits.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       CommonBits.prototype.getClass = function getClass () {
-         return CommonBits
-       };
-       CommonBits.getBit = function getBit (bits, i) {
-         var mask = 1 << i;
-         return (bits & mask) !== 0 ? 1 : 0
-       };
-       CommonBits.signExpBits = function signExpBits (num) {
-         return num >> 52
-       };
-       CommonBits.zeroLowerBits = function zeroLowerBits (bits, nBits) {
-         var invMask = (1 << nBits) - 1;
-         var mask = ~invMask;
-         var zeroed = bits & mask;
-         return zeroed
+       function _has(key) {
+         return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc.cookie);
+       }
+
+       var util = util$6;
+       var Global = util.Global;
+       var sessionStorage_1 = {
+         name: 'sessionStorage',
+         read: read$1,
+         write: write$1,
+         each: each$1,
+         remove: remove$1,
+         clearAll: clearAll$1

        };
        };

-       CommonBits.numCommonMostSigMantissaBits = function numCommonMostSigMantissaBits (num1, num2) {
-         var count = 0;
-         for (var i = 52; i >= 0; i--) {
-           if (CommonBits.getBit(num1, i) !== CommonBits.getBit(num2, i)) { return count }
-           count++;
+
+       function sessionStorage() {
+         return Global.sessionStorage;
+       }
+
+       function read$1(key) {
+         return sessionStorage().getItem(key);
+       }
+
+       function write$1(key, data) {
+         return sessionStorage().setItem(key, data);
+       }
+
+       function each$1(fn) {
+         for (var i = sessionStorage().length - 1; i >= 0; i--) {
+           var key = sessionStorage().key(i);
+           fn(read$1(key), key);

          }
          }

-         return 52
-       };
+       }

 
 

-       var CommonBitsRemover = function CommonBitsRemover () {
-         this._commonCoord = null;
-         this._ccFilter = new CommonCoordinateFilter();
-       };
+       function remove$1(key) {
+         return sessionStorage().removeItem(key);
+       }

 
 

-       var staticAccessors$42 = { CommonCoordinateFilter: { configurable: true },Translater: { configurable: true } };
-       CommonBitsRemover.prototype.addCommonBits = function addCommonBits (geom) {
-         var trans = new Translater(this._commonCoord);
-         geom.apply(trans);
-         geom.geometryChanged();
-       };
-       CommonBitsRemover.prototype.removeCommonBits = function removeCommonBits (geom) {
-         if (this._commonCoord.x === 0.0 && this._commonCoord.y === 0.0) { return geom }
-         var invCoord = new Coordinate(this._commonCoord);
-         invCoord.x = -invCoord.x;
-         invCoord.y = -invCoord.y;
-         var trans = new Translater(invCoord);
-         geom.apply(trans);
-         geom.geometryChanged();
-         return geom
-       };
-       CommonBitsRemover.prototype.getCommonCoordinate = function getCommonCoordinate () {
-         return this._commonCoord
-       };
-       CommonBitsRemover.prototype.add = function add (geom) {
-         geom.apply(this._ccFilter);
-         this._commonCoord = this._ccFilter.getCommonCoordinate();
-       };
-       CommonBitsRemover.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       CommonBitsRemover.prototype.getClass = function getClass () {
-         return CommonBitsRemover
-       };
-       staticAccessors$42.CommonCoordinateFilter.get = function () { return CommonCoordinateFilter };
-       staticAccessors$42.Translater.get = function () { return Translater };
+       function clearAll$1() {
+         return sessionStorage().clear();
+       }

 
 

-       Object.defineProperties( CommonBitsRemover, staticAccessors$42 );
+       // is functions (meaning store.get(), store.set(), etc will all function).
+       // However, stored values will not persist when the browser navigates to
+       // a new page or reloads the current page.

 
 

-       var CommonCoordinateFilter = function CommonCoordinateFilter () {
-         this._commonBitsX = new CommonBits();
-         this._commonBitsY = new CommonBits();
-       };
-       CommonCoordinateFilter.prototype.filter = function filter (coord) {
-         this._commonBitsX.add(coord.x);
-         this._commonBitsY.add(coord.y);
-       };
-       CommonCoordinateFilter.prototype.getCommonCoordinate = function getCommonCoordinate () {
-         return new Coordinate(this._commonBitsX.getCommon(), this._commonBitsY.getCommon())
-       };
-       CommonCoordinateFilter.prototype.interfaces_ = function interfaces_ () {
-         return [CoordinateFilter]
-       };
-       CommonCoordinateFilter.prototype.getClass = function getClass () {
-         return CommonCoordinateFilter
+       var memoryStorage_1 = {
+         name: 'memoryStorage',
+         read: read,
+         write: write,
+         each: each,
+         remove: remove,
+         clearAll: clearAll

        };
        };

+       var memoryStorage = {};

 
 

-       var Translater = function Translater () {
-         this.trans = null;
-         var trans = arguments[0];
-         this.trans = trans;
-       };
-       Translater.prototype.filter = function filter (seq, i) {
-         var xp = seq.getOrdinate(i, 0) + this.trans.x;
-         var yp = seq.getOrdinate(i, 1) + this.trans.y;
-         seq.setOrdinate(i, 0, xp);
-         seq.setOrdinate(i, 1, yp);
-       };
-       Translater.prototype.isDone = function isDone () {
-         return false
-       };
-       Translater.prototype.isGeometryChanged = function isGeometryChanged () {
-         return true
-       };
-       Translater.prototype.interfaces_ = function interfaces_ () {
-         return [CoordinateSequenceFilter]
-       };
-       Translater.prototype.getClass = function getClass () {
-         return Translater
-       };
+       function read(key) {
+         return memoryStorage[key];
+       }

 
 

-       var SnapOverlayOp = function SnapOverlayOp (g1, g2) {
-         this._geom = new Array(2).fill(null);
-         this._snapTolerance = null;
-         this._cbr = null;
-         this._geom[0] = g1;
-         this._geom[1] = g2;
-         this.computeSnapTolerance();
-       };
-       SnapOverlayOp.prototype.selfSnap = function selfSnap (geom) {
-         var snapper0 = new GeometrySnapper(geom);
-         var snapGeom = snapper0.snapTo(geom, this._snapTolerance);
-         return snapGeom
-       };
-       SnapOverlayOp.prototype.removeCommonBits = function removeCommonBits (geom) {
-         this._cbr = new CommonBitsRemover();
-         this._cbr.add(geom[0]);
-         this._cbr.add(geom[1]);
-         var remGeom = new Array(2).fill(null);
-         remGeom[0] = this._cbr.removeCommonBits(geom[0].copy());
-         remGeom[1] = this._cbr.removeCommonBits(geom[1].copy());
-         return remGeom
-       };
-       SnapOverlayOp.prototype.prepareResult = function prepareResult (geom) {
-         this._cbr.addCommonBits(geom);
-         return geom
-       };
-       SnapOverlayOp.prototype.getResultGeometry = function getResultGeometry (opCode) {
-         var prepGeom = this.snap(this._geom);
-         var result = OverlayOp.overlayOp(prepGeom[0], prepGeom[1], opCode);
-         return this.prepareResult(result)
-       };
-       SnapOverlayOp.prototype.checkValid = function checkValid (g) {
-         if (!g.isValid()) {
-           System.out.println('Snapped geometry is invalid');
+       function write(key, data) {
+         memoryStorage[key] = data;
+       }
+
+       function each(callback) {
+         for (var key in memoryStorage) {
+           if (memoryStorage.hasOwnProperty(key)) {
+             callback(memoryStorage[key], key);
+           }

          }
          }

-       };
-       SnapOverlayOp.prototype.computeSnapTolerance = function computeSnapTolerance () {
-         this._snapTolerance = GeometrySnapper.computeOverlaySnapTolerance(this._geom[0], this._geom[1]);
-       };
-       SnapOverlayOp.prototype.snap = function snap (geom) {
-         var remGeom = this.removeCommonBits(geom);
-         var snapGeom = GeometrySnapper.snap(remGeom[0], remGeom[1], this._snapTolerance);
-         return snapGeom
-       };
-       SnapOverlayOp.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       SnapOverlayOp.prototype.getClass = function getClass () {
-         return SnapOverlayOp
-       };
-       SnapOverlayOp.overlayOp = function overlayOp (g0, g1, opCode) {
-         var op = new SnapOverlayOp(g0, g1);
-         return op.getResultGeometry(opCode)
-       };
-       SnapOverlayOp.union = function union (g0, g1) {
-         return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.UNION)
-       };
-       SnapOverlayOp.intersection = function intersection (g0, g1) {
-         return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.INTERSECTION)
-       };
-       SnapOverlayOp.symDifference = function symDifference (g0, g1) {
-         return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.SYMDIFFERENCE)
-       };
-       SnapOverlayOp.difference = function difference (g0, g1) {
-         return SnapOverlayOp.overlayOp(g0, g1, OverlayOp.DIFFERENCE)
-       };
+       }

 
 

-       var SnapIfNeededOverlayOp = function SnapIfNeededOverlayOp (g1, g2) {
-         this._geom = new Array(2).fill(null);
-         this._geom[0] = g1;
-         this._geom[1] = g2;
-       };
-       SnapIfNeededOverlayOp.prototype.getResultGeometry = function getResultGeometry (opCode) {
-         var result = null;
-         var isSuccess = false;
-         var savedException = null;
-         try {
-           result = OverlayOp.overlayOp(this._geom[0], this._geom[1], opCode);
-           var isValid = true;
-           if (isValid) { isSuccess = true; }
-         } catch (ex) {
-           if (ex instanceof RuntimeException) {
-             savedException = ex;
-           } else { throw ex }
-         } finally {}
-         if (!isSuccess) {
-           try {
-             result = SnapOverlayOp.overlayOp(this._geom[0], this._geom[1], opCode);
-           } catch (ex$1) {
-             if (ex$1 instanceof RuntimeException) {
-               throw savedException
-             } else { throw ex$1 }
-           } finally {}
-         }
-         return result
-       };
-       SnapIfNeededOverlayOp.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       SnapIfNeededOverlayOp.prototype.getClass = function getClass () {
-         return SnapIfNeededOverlayOp
-       };
-       SnapIfNeededOverlayOp.overlayOp = function overlayOp (g0, g1, opCode) {
-         var op = new SnapIfNeededOverlayOp(g0, g1);
-         return op.getResultGeometry(opCode)
-       };
-       SnapIfNeededOverlayOp.union = function union (g0, g1) {
-         return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.UNION)
-       };
-       SnapIfNeededOverlayOp.intersection = function intersection (g0, g1) {
-         return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.INTERSECTION)
-       };
-       SnapIfNeededOverlayOp.symDifference = function symDifference (g0, g1) {
-         return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.SYMDIFFERENCE)
-       };
-       SnapIfNeededOverlayOp.difference = function difference (g0, g1) {
-         return SnapIfNeededOverlayOp.overlayOp(g0, g1, OverlayOp.DIFFERENCE)
-       };
+       function remove(key) {
+         delete memoryStorage[key];
+       }

 
 

-       var MonotoneChain$2 = function MonotoneChain () {
-         this.mce = null;
-         this.chainIndex = null;
-         var mce = arguments[0];
-         var chainIndex = arguments[1];
-         this.mce = mce;
-         this.chainIndex = chainIndex;
-       };
-       MonotoneChain$2.prototype.computeIntersections = function computeIntersections (mc, si) {
-         this.mce.computeIntersectsForChain(this.chainIndex, mc.mce, mc.chainIndex, si);
-       };
-       MonotoneChain$2.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       MonotoneChain$2.prototype.getClass = function getClass () {
-         return MonotoneChain$2
-       };
+       function clearAll(key) {
+         memoryStorage = {};
+       }

 
 

-       var SweepLineEvent = function SweepLineEvent () {
-         this._label = null;
-         this._xValue = null;
-         this._eventType = null;
-         this._insertEvent = null;
-         this._deleteEventIndex = null;
-         this._obj = null;
-         if (arguments.length === 2) {
-           var x = arguments[0];
-           var insertEvent = arguments[1];
-           this._eventType = SweepLineEvent.DELETE;
-           this._xValue = x;
-           this._insertEvent = insertEvent;
-         } else if (arguments.length === 3) {
-           var label = arguments[0];
-           var x$1 = arguments[1];
-           var obj = arguments[2];
-           this._eventType = SweepLineEvent.INSERT;
-           this._label = label;
-           this._xValue = x$1;
-           this._obj = obj;
-         }
-       };
+       var all = [// Listed in order of usage preference
+       localStorage_1, oldFFGlobalStorage, oldIEUserDataStorage, cookieStorage, sessionStorage_1, memoryStorage_1];

 
 

-       var staticAccessors$43 = { INSERT: { configurable: true },DELETE: { configurable: true } };
-       SweepLineEvent.prototype.isDelete = function isDelete () {
-         return this._eventType === SweepLineEvent.DELETE
-       };
-       SweepLineEvent.prototype.setDeleteEventIndex = function setDeleteEventIndex (deleteEventIndex) {
-         this._deleteEventIndex = deleteEventIndex;
-       };
-       SweepLineEvent.prototype.getObject = function getObject () {
-         return this._obj
-       };
-       SweepLineEvent.prototype.compareTo = function compareTo (o) {
-         var pe = o;
-         if (this._xValue < pe._xValue) { return -1 }
-         if (this._xValue > pe._xValue) { return 1 }
-         if (this._eventType < pe._eventType) { return -1 }
-         if (this._eventType > pe._eventType) { return 1 }
-         return 0
-       };
-       SweepLineEvent.prototype.getInsertEvent = function getInsertEvent () {
-         return this._insertEvent
-       };
-       SweepLineEvent.prototype.isInsert = function isInsert () {
-         return this._eventType === SweepLineEvent.INSERT
-       };
-       SweepLineEvent.prototype.isSameLabel = function isSameLabel (ev) {
-         if (this._label === null) { return false }
-         return this._label === ev._label
-       };
-       SweepLineEvent.prototype.getDeleteEventIndex = function getDeleteEventIndex () {
-         return this._deleteEventIndex
-       };
-       SweepLineEvent.prototype.interfaces_ = function interfaces_ () {
-         return [Comparable]
-       };
-       SweepLineEvent.prototype.getClass = function getClass () {
-         return SweepLineEvent
-       };
-       staticAccessors$43.INSERT.get = function () { return 1 };
-       staticAccessors$43.DELETE.get = function () { return 2 };
+       /* eslint-disable */
+       //  json2.js
+       //  2016-10-28
+       //  Public Domain.
+       //  NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
+       //  See http://www.JSON.org/js.html
+       //  This code should be minified before deployment.
+       //  See http://javascript.crockford.com/jsmin.html
+       //  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
+       //  NOT CONTROL.
+       //  This file creates a global JSON object containing two methods: stringify
+       //  and parse. This file provides the ES5 JSON capability to ES3 systems.
+       //  If a project might run on IE8 or earlier, then this file should be included.
+       //  This file does nothing on ES5 systems.
+       //      JSON.stringify(value, replacer, space)
+       //          value       any JavaScript value, usually an object or array.
+       //          replacer    an optional parameter that determines how object
+       //                      values are stringified for objects. It can be a
+       //                      function or an array of strings.
+       //          space       an optional parameter that specifies the indentation
+       //                      of nested structures. If it is omitted, the text will
+       //                      be packed without extra whitespace. If it is a number,
+       //                      it will specify the number of spaces to indent at each
+       //                      level. If it is a string (such as "\t" or "&nbsp;"),
+       //                      it contains the characters used to indent at each level.
+       //          This method produces a JSON text from a JavaScript value.
+       //          When an object value is found, if the object contains a toJSON
+       //          method, its toJSON method will be called and the result will be
+       //          stringified. A toJSON method does not serialize: it returns the
+       //          value represented by the name/value pair that should be serialized,
+       //          or undefined if nothing should be serialized. The toJSON method
+       //          will be passed the key associated with the value, and this will be
+       //          bound to the value.
+       //          For example, this would serialize Dates as ISO strings.
+       //              Date.prototype.toJSON = function (key) {
+       //                  function f(n) {
+       //                      // Format integers to have at least two digits.
+       //                      return (n < 10)
+       //                          ? "0" + n
+       //                          : n;
+       //                  }
+       //                  return this.getUTCFullYear()   + "-" +
+       //                       f(this.getUTCMonth() + 1) + "-" +
+       //                       f(this.getUTCDate())      + "T" +
+       //                       f(this.getUTCHours())     + ":" +
+       //                       f(this.getUTCMinutes())   + ":" +
+       //                       f(this.getUTCSeconds())   + "Z";
+       //              };
+       //          You can provide an optional replacer method. It will be passed the
+       //          key and value of each member, with this bound to the containing
+       //          object. The value that is returned from your method will be
+       //          serialized. If your method returns undefined, then the member will
+       //          be excluded from the serialization.
+       //          If the replacer parameter is an array of strings, then it will be
+       //          used to select the members to be serialized. It filters the results
+       //          such that only members with keys listed in the replacer array are
+       //          stringified.
+       //          Values that do not have JSON representations, such as undefined or
+       //          functions, will not be serialized. Such values in objects will be
+       //          dropped; in arrays they will be replaced with null. You can use
+       //          a replacer function to replace those with JSON values.
+       //          JSON.stringify(undefined) returns undefined.
+       //          The optional space parameter produces a stringification of the
+       //          value that is filled with line breaks and indentation to make it
+       //          easier to read.
+       //          If the space parameter is a non-empty string, then that string will
+       //          be used for indentation. If the space parameter is a number, then
+       //          the indentation will be that many spaces.
+       //          Example:
+       //          text = JSON.stringify(["e", {pluribus: "unum"}]);
+       //          // text is '["e",{"pluribus":"unum"}]'
+       //          text = JSON.stringify(["e", {pluribus: "unum"}], null, "\t");
+       //          // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+       //          text = JSON.stringify([new Date()], function (key, value) {
+       //              return this[key] instanceof Date
+       //                  ? "Date(" + this[key] + ")"
+       //                  : value;
+       //          });
+       //          // text is '["Date(---current time---)"]'
+       //      JSON.parse(text, reviver)
+       //          This method parses a JSON text to produce an object or array.
+       //          It can throw a SyntaxError exception.
+       //          The optional reviver parameter is a function that can filter and
+       //          transform the results. It receives each of the keys and values,
+       //          and its return value is used instead of the original value.
+       //          If it returns what it received, then the structure is not modified.
+       //          If it returns undefined then the member is deleted.
+       //          Example:
+       //          // Parse the text. Values that look like ISO date strings will
+       //          // be converted to Date objects.
+       //          myData = JSON.parse(text, function (key, value) {
+       //              var a;
+       //              if (typeof value === "string") {
+       //                  a =
+       //   /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
+       //                  if (a) {
+       //                      return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+       //                          +a[5], +a[6]));
+       //                  }
+       //              }
+       //              return value;
+       //          });
+       //          myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
+       //              var d;
+       //              if (typeof value === "string" &&
+       //                      value.slice(0, 5) === "Date(" &&
+       //                      value.slice(-1) === ")") {
+       //                  d = new Date(value.slice(5, -1));
+       //                  if (d) {
+       //                      return d;
+       //                  }
+       //              }
+       //              return value;
+       //          });
+       //  This is a reference implementation. You are free to copy, modify, or
+       //  redistribute.
+
+       /*jslint
+           eval, for, this
+       */

 
 

-       Object.defineProperties( SweepLineEvent, staticAccessors$43 );
+       /*property
+           JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
+           getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
+           lastIndex, length, parse, prototype, push, replace, slice, stringify,
+           test, toJSON, toString, valueOf
+       */
+       // Create a JSON object only if one does not already exist. We create the
+       // methods in a closure to avoid creating global variables.
+       if ((typeof JSON === "undefined" ? "undefined" : _typeof(JSON)) !== "object") {
+         JSON = {};
+       }

 
 

-       var EdgeSetIntersector = function EdgeSetIntersector () {};
+       (function () {

 
 

-       EdgeSetIntersector.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       EdgeSetIntersector.prototype.getClass = function getClass () {
-         return EdgeSetIntersector
-       };
+         var rx_one = /^[\],:{}\s]*$/;
+         var rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
+         var rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
+         var rx_four = /(?:^|:|,)(?:\s*\[)+/g;
+         var rx_escapable = /[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+         var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;

 
 

-       var SegmentIntersector$2 = function SegmentIntersector () {
-         this._hasIntersection = false;
-         this._hasProper = false;
-         this._hasProperInterior = false;
-         this._properIntersectionPoint = null;
-         this._li = null;
-         this._includeProper = null;
-         this._recordIsolated = null;
-         this._isSelfIntersection = null;
-         this._numIntersections = 0;
-         this.numTests = 0;
-         this._bdyNodes = null;
-         this._isDone = false;
-         this._isDoneWhenProperInt = false;
-         var li = arguments[0];
-         var includeProper = arguments[1];
-         var recordIsolated = arguments[2];
-         this._li = li;
-         this._includeProper = includeProper;
-         this._recordIsolated = recordIsolated;
-       };
-       SegmentIntersector$2.prototype.isTrivialIntersection = function isTrivialIntersection (e0, segIndex0, e1, segIndex1) {
-         if (e0 === e1) {
-           if (this._li.getIntersectionNum() === 1) {
-             if (SegmentIntersector$2.isAdjacentSegments(segIndex0, segIndex1)) { return true }
-             if (e0.isClosed()) {
-               var maxSegIndex = e0.getNumPoints() - 1;
-               if ((segIndex0 === 0 && segIndex1 === maxSegIndex) ||
-                   (segIndex1 === 0 && segIndex0 === maxSegIndex)) {
-                 return true
-               }
-             }
-           }
+         function f(n) {
+           // Format integers to have at least two digits.
+           return n < 10 ? "0" + n : n;

          }
          }

-         return false
-       };
-       SegmentIntersector$2.prototype.getProperIntersectionPoint = function getProperIntersectionPoint () {
-         return this._properIntersectionPoint
-       };
-       SegmentIntersector$2.prototype.setIsDoneIfProperInt = function setIsDoneIfProperInt (isDoneWhenProperInt) {
-         this._isDoneWhenProperInt = isDoneWhenProperInt;
-       };
-       SegmentIntersector$2.prototype.hasProperInteriorIntersection = function hasProperInteriorIntersection () {
-         return this._hasProperInterior
-       };
-       SegmentIntersector$2.prototype.isBoundaryPointInternal = function isBoundaryPointInternal (li, bdyNodes) {
-         for (var i = bdyNodes.iterator(); i.hasNext();) {
-           var node = i.next();
-           var pt = node.getCoordinate();
-           if (li.isIntersection(pt)) { return true }
+
+         function this_value() {
+           return this.valueOf();

          }
          }

-         return false
-       };
-       SegmentIntersector$2.prototype.hasProperIntersection = function hasProperIntersection () {
-         return this._hasProper
-       };
-       SegmentIntersector$2.prototype.hasIntersection = function hasIntersection () {
-         return this._hasIntersection
-       };
-       SegmentIntersector$2.prototype.isDone = function isDone () {
-         return this._isDone
-       };
-       SegmentIntersector$2.prototype.isBoundaryPoint = function isBoundaryPoint (li, bdyNodes) {
-         if (bdyNodes === null) { return false }
-         if (this.isBoundaryPointInternal(li, bdyNodes[0])) { return true }
-         if (this.isBoundaryPointInternal(li, bdyNodes[1])) { return true }
-         return false
-       };
-       SegmentIntersector$2.prototype.setBoundaryNodes = function setBoundaryNodes (bdyNodes0, bdyNodes1) {
-         this._bdyNodes = new Array(2).fill(null);
-         this._bdyNodes[0] = bdyNodes0;
-         this._bdyNodes[1] = bdyNodes1;
-       };
-       SegmentIntersector$2.prototype.addIntersections = function addIntersections (e0, segIndex0, e1, segIndex1) {
-         if (e0 === e1 && segIndex0 === segIndex1) { return null }
-         this.numTests++;
-         var p00 = e0.getCoordinates()[segIndex0];
-         var p01 = e0.getCoordinates()[segIndex0 + 1];
-         var p10 = e1.getCoordinates()[segIndex1];
-         var p11 = e1.getCoordinates()[segIndex1 + 1];
-         this._li.computeIntersection(p00, p01, p10, p11);
-         if (this._li.hasIntersection()) {
-           if (this._recordIsolated) {
-             e0.setIsolated(false);
-             e1.setIsolated(false);
-           }
-           this._numIntersections++;
-           if (!this.isTrivialIntersection(e0, segIndex0, e1, segIndex1)) {
-             this._hasIntersection = true;
-             if (this._includeProper || !this._li.isProper()) {
-               e0.addIntersections(this._li, segIndex0, 0);
-               e1.addIntersections(this._li, segIndex1, 1);
-             }
-             if (this._li.isProper()) {
-               this._properIntersectionPoint = this._li.getIntersection(0).copy();
-               this._hasProper = true;
-               if (this._isDoneWhenProperInt) {
-                 this._isDone = true;
-               }
-               if (!this.isBoundaryPoint(this._li, this._bdyNodes)) { this._hasProperInterior = true; }
-             }
-           }
+
+         if (typeof Date.prototype.toJSON !== "function") {
+           Date.prototype.toJSON = function () {
+             return isFinite(this.valueOf()) ? this.getUTCFullYear() + "-" + f(this.getUTCMonth() + 1) + "-" + f(this.getUTCDate()) + "T" + f(this.getUTCHours()) + ":" + f(this.getUTCMinutes()) + ":" + f(this.getUTCSeconds()) + "Z" : null;
+           };
+
+           Boolean.prototype.toJSON = this_value;
+           Number.prototype.toJSON = this_value;
+           String.prototype.toJSON = this_value;

          }
          }

-       };
-       SegmentIntersector$2.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       SegmentIntersector$2.prototype.getClass = function getClass () {
-         return SegmentIntersector$2
-       };
-       SegmentIntersector$2.isAdjacentSegments = function isAdjacentSegments (i1, i2) {
-         return Math.abs(i1 - i2) === 1
-       };

 
 

-       var SimpleMCSweepLineIntersector = (function (EdgeSetIntersector$$1) {
-         function SimpleMCSweepLineIntersector () {
-           EdgeSetIntersector$$1.call(this);
-           this.events = new ArrayList();
-           this.nOverlaps = null;
+         var gap;
+         var indent;
+         var meta;
+         var rep;
+
+         function quote(string) {
+           // If the string contains no control characters, no quote characters, and no
+           // backslash characters, then we can safely slap some quotes around it.
+           // Otherwise we must also replace the offending characters with safe escape
+           // sequences.
+           rx_escapable.lastIndex = 0;
+           return rx_escapable.test(string) ? "\"" + string.replace(rx_escapable, function (a) {
+             var c = meta[a];
+             return typeof c === "string" ? c : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
+           }) + "\"" : "\"" + string + "\"";

          }
 
          }
 

-         if ( EdgeSetIntersector$$1 ) { SimpleMCSweepLineIntersector.__proto__ = EdgeSetIntersector$$1; }
-         SimpleMCSweepLineIntersector.prototype = Object.create( EdgeSetIntersector$$1 && EdgeSetIntersector$$1.prototype );
-         SimpleMCSweepLineIntersector.prototype.constructor = SimpleMCSweepLineIntersector;
-         SimpleMCSweepLineIntersector.prototype.prepareEvents = function prepareEvents () {
-           var this$1 = this;
+         function str(key, holder) {
+           // Produce a string from holder[key].
+           var i; // The loop counter.

 
 

-           Collections.sort(this.events);
-           for (var i = 0; i < this.events.size(); i++) {
-             var ev = this$1.events.get(i);
-             if (ev.isDelete()) {
-               ev.getInsertEvent().setDeleteEventIndex(i);
-             }
-           }
-         };
-         SimpleMCSweepLineIntersector.prototype.computeIntersections = function computeIntersections () {
-           var this$1 = this;
+           var k; // The member key.

 
 

-           if (arguments.length === 1) {
-             var si = arguments[0];
-             this.nOverlaps = 0;
-             this.prepareEvents();
-             for (var i = 0; i < this.events.size(); i++) {
-               var ev = this$1.events.get(i);
-               if (ev.isInsert()) {
-                 this$1.processOverlaps(i, ev.getDeleteEventIndex(), ev, si);
-               }
-               if (si.isDone()) {
-                 break
-               }
-             }
-           } else if (arguments.length === 3) {
-             if (arguments[2] instanceof SegmentIntersector$2 && (hasInterface(arguments[0], List) && hasInterface(arguments[1], List))) {
-               var edges0 = arguments[0];
-               var edges1 = arguments[1];
-               var si$1 = arguments[2];
-               this.addEdges(edges0, edges0);
-               this.addEdges(edges1, edges1);
-               this.computeIntersections(si$1);
-             } else if (typeof arguments[2] === 'boolean' && (hasInterface(arguments[0], List) && arguments[1] instanceof SegmentIntersector$2)) {
-               var edges = arguments[0];
-               var si$2 = arguments[1];
-               var testAllSegments = arguments[2];
-               if (testAllSegments) { this.addEdges(edges, null); } else { this.addEdges(edges); }
-               this.computeIntersections(si$2);
-             }
-           }
-         };
-         SimpleMCSweepLineIntersector.prototype.addEdge = function addEdge (edge, edgeSet) {
-           var this$1 = this;
+           var v; // The member value.

 
 

-           var mce = edge.getMonotoneChainEdge();
-           var startIndex = mce.getStartIndexes();
-           for (var i = 0; i < startIndex.length - 1; i++) {
-             var mc = new MonotoneChain$2(mce, i);
-             var insertEvent = new SweepLineEvent(edgeSet, mce.getMinX(i), mc);
-             this$1.events.add(insertEvent);
-             this$1.events.add(new SweepLineEvent(mce.getMaxX(i), insertEvent));
-           }
-         };
-         SimpleMCSweepLineIntersector.prototype.processOverlaps = function processOverlaps (start, end, ev0, si) {
-           var this$1 = this;
+           var length;
+           var mind = gap;
+           var partial;
+           var value = holder[key]; // If the value has a toJSON method, call it to obtain a replacement value.

 
 

-           var mc0 = ev0.getObject();
-           for (var i = start; i < end; i++) {
-             var ev1 = this$1.events.get(i);
-             if (ev1.isInsert()) {
-               var mc1 = ev1.getObject();
-               if (!ev0.isSameLabel(ev1)) {
-                 mc0.computeIntersections(mc1, si);
-                 this$1.nOverlaps++;
-               }
-             }
-           }
-         };
-         SimpleMCSweepLineIntersector.prototype.addEdges = function addEdges () {
-           var this$1 = this;
+           if (value && _typeof(value) === "object" && typeof value.toJSON === "function") {
+             value = value.toJSON(key);
+           } // If we were called with a replacer function, then call the replacer to
+           // obtain a replacement value.

 
 

-           if (arguments.length === 1) {
-             var edges = arguments[0];
-             for (var i = edges.iterator(); i.hasNext();) {
-               var edge = i.next();
-               this$1.addEdge(edge, edge);
-             }
-           } else if (arguments.length === 2) {
-             var edges$1 = arguments[0];
-             var edgeSet = arguments[1];
-             for (var i$1 = edges$1.iterator(); i$1.hasNext();) {
-               var edge$1 = i$1.next();
-               this$1.addEdge(edge$1, edgeSet);
-             }
-           }
-         };
-         SimpleMCSweepLineIntersector.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         SimpleMCSweepLineIntersector.prototype.getClass = function getClass () {
-           return SimpleMCSweepLineIntersector
-         };

 
 

-         return SimpleMCSweepLineIntersector;
-       }(EdgeSetIntersector));
+           if (typeof rep === "function") {
+             value = rep.call(holder, key, value);
+           } // What happens next depends on the value's type.

 
 

-       var IntervalRTreeNode = function IntervalRTreeNode () {
-         this._min = Double.POSITIVE_INFINITY;
-         this._max = Double.NEGATIVE_INFINITY;
-       };

 
 

-       var staticAccessors$45 = { NodeComparator: { configurable: true } };
-       IntervalRTreeNode.prototype.getMin = function getMin () {
-         return this._min
-       };
-       IntervalRTreeNode.prototype.intersects = function intersects (queryMin, queryMax) {
-         if (this._min > queryMax || this._max < queryMin) { return false }
-         return true
-       };
-       IntervalRTreeNode.prototype.getMax = function getMax () {
-         return this._max
-       };
-       IntervalRTreeNode.prototype.toString = function toString () {
-         return WKTWriter.toLineString(new Coordinate(this._min, 0), new Coordinate(this._max, 0))
-       };
-       IntervalRTreeNode.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       IntervalRTreeNode.prototype.getClass = function getClass () {
-         return IntervalRTreeNode
-       };
-       staticAccessors$45.NodeComparator.get = function () { return NodeComparator };
+           switch (_typeof(value)) {
+             case "string":
+               return quote(value);

 
 

-       Object.defineProperties( IntervalRTreeNode, staticAccessors$45 );
+             case "number":
+               // JSON numbers must be finite. Encode non-finite numbers as null.
+               return isFinite(value) ? String(value) : "null";

 
 

-       var NodeComparator = function NodeComparator () {};
+             case "boolean":
+             case "null":
+               // If the value is a boolean or null, convert it to a string. Note:
+               // typeof null does not produce "null". The case is included here in
+               // the remote chance that this gets fixed someday.
+               return String(value);
+             // If the type is "object", we might be dealing with an object or an array or
+             // null.

 
 

-       NodeComparator.prototype.compare = function compare (o1, o2) {
-         var n1 = o1;
-         var n2 = o2;
-         var mid1 = (n1._min + n1._max) / 2;
-         var mid2 = (n2._min + n2._max) / 2;
-         if (mid1 < mid2) { return -1 }
-         if (mid1 > mid2) { return 1 }
-         return 0
-       };
-       NodeComparator.prototype.interfaces_ = function interfaces_ () {
-         return [Comparator]
-       };
-       NodeComparator.prototype.getClass = function getClass () {
-         return NodeComparator
-       };
+             case "object":
+               // Due to a specification blunder in ECMAScript, typeof null is "object",
+               // so watch out for that case.
+               if (!value) {
+                 return "null";
+               } // Make an array to hold the partial results of stringifying this object value.

 
 

-       var IntervalRTreeLeafNode = (function (IntervalRTreeNode$$1) {
-         function IntervalRTreeLeafNode () {
-           IntervalRTreeNode$$1.call(this);
-           this._item = null;
-           var min = arguments[0];
-           var max = arguments[1];
-           var item = arguments[2];
-           this._min = min;
-           this._max = max;
-           this._item = item;
-         }

 
 

-         if ( IntervalRTreeNode$$1 ) { IntervalRTreeLeafNode.__proto__ = IntervalRTreeNode$$1; }
-         IntervalRTreeLeafNode.prototype = Object.create( IntervalRTreeNode$$1 && IntervalRTreeNode$$1.prototype );
-         IntervalRTreeLeafNode.prototype.constructor = IntervalRTreeLeafNode;
-         IntervalRTreeLeafNode.prototype.query = function query (queryMin, queryMax, visitor) {
-           if (!this.intersects(queryMin, queryMax)) { return null }
-           visitor.visitItem(this._item);
-         };
-         IntervalRTreeLeafNode.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         IntervalRTreeLeafNode.prototype.getClass = function getClass () {
-           return IntervalRTreeLeafNode
-         };
+               gap += indent;
+               partial = []; // Is the value an array?

 
 

-         return IntervalRTreeLeafNode;
-       }(IntervalRTreeNode));
+               if (Object.prototype.toString.apply(value) === "[object Array]") {
+                 // The value is an array. Stringify every element. Use null as a placeholder
+                 // for non-JSON values.
+                 length = value.length;

 
 

-       var IntervalRTreeBranchNode = (function (IntervalRTreeNode$$1) {
-         function IntervalRTreeBranchNode () {
-           IntervalRTreeNode$$1.call(this);
-           this._node1 = null;
-           this._node2 = null;
-           var n1 = arguments[0];
-           var n2 = arguments[1];
-           this._node1 = n1;
-           this._node2 = n2;
-           this.buildExtent(this._node1, this._node2);
-         }
+                 for (i = 0; i < length; i += 1) {
+                   partial[i] = str(i, value) || "null";
+                 } // Join all of the elements together, separated with commas, and wrap them in
+                 // brackets.

 
 

-         if ( IntervalRTreeNode$$1 ) { IntervalRTreeBranchNode.__proto__ = IntervalRTreeNode$$1; }
-         IntervalRTreeBranchNode.prototype = Object.create( IntervalRTreeNode$$1 && IntervalRTreeNode$$1.prototype );
-         IntervalRTreeBranchNode.prototype.constructor = IntervalRTreeBranchNode;
-         IntervalRTreeBranchNode.prototype.buildExtent = function buildExtent (n1, n2) {
-           this._min = Math.min(n1._min, n2._min);
-           this._max = Math.max(n1._max, n2._max);
-         };
-         IntervalRTreeBranchNode.prototype.query = function query (queryMin, queryMax, visitor) {
-           if (!this.intersects(queryMin, queryMax)) {
-             return null
-           }
-           if (this._node1 !== null) { this._node1.query(queryMin, queryMax, visitor); }
-           if (this._node2 !== null) { this._node2.query(queryMin, queryMax, visitor); }
-         };
-         IntervalRTreeBranchNode.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         IntervalRTreeBranchNode.prototype.getClass = function getClass () {
-           return IntervalRTreeBranchNode
-         };

 
 

-         return IntervalRTreeBranchNode;
-       }(IntervalRTreeNode));
+                 v = partial.length === 0 ? "[]" : gap ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]" : "[" + partial.join(",") + "]";
+                 gap = mind;
+                 return v;
+               } // If the replacer is an array, use it to select the members to be stringified.

 
 

-       var SortedPackedIntervalRTree = function SortedPackedIntervalRTree () {
-         this._leaves = new ArrayList();
-         this._root = null;
-         this._level = 0;
-       };
-       SortedPackedIntervalRTree.prototype.buildTree = function buildTree () {
-           var this$1 = this;

 
 

-         Collections.sort(this._leaves, new IntervalRTreeNode.NodeComparator());
-         var src = this._leaves;
-         var temp = null;
-         var dest = new ArrayList();
-         while (true) {
-           this$1.buildLevel(src, dest);
-           if (dest.size() === 1) { return dest.get(0) }
-           temp = src;
-           src = dest;
-           dest = temp;
-         }
-       };
-       SortedPackedIntervalRTree.prototype.insert = function insert (min, max, item) {
-         if (this._root !== null) { throw new Error('Index cannot be added to once it has been queried') }
-         this._leaves.add(new IntervalRTreeLeafNode(min, max, item));
-       };
-       SortedPackedIntervalRTree.prototype.query = function query (min, max, visitor) {
-         this.init();
-         this._root.query(min, max, visitor);
-       };
-       SortedPackedIntervalRTree.prototype.buildRoot = function buildRoot () {
-         if (this._root !== null) { return null }
-         this._root = this.buildTree();
-       };
-       SortedPackedIntervalRTree.prototype.printNode = function printNode (node) {
-         System.out.println(WKTWriter.toLineString(new Coordinate(node._min, this._level), new Coordinate(node._max, this._level)));
-       };
-       SortedPackedIntervalRTree.prototype.init = function init () {
-         if (this._root !== null) { return null }
-         this.buildRoot();
-       };
-       SortedPackedIntervalRTree.prototype.buildLevel = function buildLevel (src, dest) {
-         this._level++;
-         dest.clear();
-         for (var i = 0; i < src.size(); i += 2) {
-           var n1 = src.get(i);
-           var n2 = i + 1 < src.size() ? src.get(i) : null;
-           if (n2 === null) {
-             dest.add(n1);
-           } else {
-             var node = new IntervalRTreeBranchNode(src.get(i), src.get(i + 1));
-             dest.add(node);
-           }
-         }
-       };
-       SortedPackedIntervalRTree.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       SortedPackedIntervalRTree.prototype.getClass = function getClass () {
-         return SortedPackedIntervalRTree
-       };
+               if (rep && _typeof(rep) === "object") {
+                 length = rep.length;

 
 

-       var ArrayListVisitor = function ArrayListVisitor () {
-         this._items = new ArrayList();
-       };
-       ArrayListVisitor.prototype.visitItem = function visitItem (item) {
-         this._items.add(item);
-       };
-       ArrayListVisitor.prototype.getItems = function getItems () {
-         return this._items
-       };
-       ArrayListVisitor.prototype.interfaces_ = function interfaces_ () {
-         return [ItemVisitor]
-       };
-       ArrayListVisitor.prototype.getClass = function getClass () {
-         return ArrayListVisitor
-       };
+                 for (i = 0; i < length; i += 1) {
+                   if (typeof rep[i] === "string") {
+                     k = rep[i];
+                     v = str(k, value);

 
 

-       var IndexedPointInAreaLocator = function IndexedPointInAreaLocator () {
-         this._index = null;
-         var g = arguments[0];
-         if (!hasInterface(g, Polygonal)) { throw new IllegalArgumentException('Argument must be Polygonal') }
-         this._index = new IntervalIndexedGeometry(g);
-       };
+                     if (v) {
+                       partial.push(quote(k) + (gap ? ": " : ":") + v);
+                     }
+                   }
+                 }
+               } else {
+                 // Otherwise, iterate through all of the keys in the object.
+                 for (k in value) {
+                   if (Object.prototype.hasOwnProperty.call(value, k)) {
+                     v = str(k, value);

 
 

-       var staticAccessors$44 = { SegmentVisitor: { configurable: true },IntervalIndexedGeometry: { configurable: true } };
-       IndexedPointInAreaLocator.prototype.locate = function locate (p) {
-         var rcc = new RayCrossingCounter(p);
-         var visitor = new SegmentVisitor(rcc);
-         this._index.query(p.y, p.y, visitor);
-         return rcc.getLocation()
-       };
-       IndexedPointInAreaLocator.prototype.interfaces_ = function interfaces_ () {
-         return [PointOnGeometryLocator]
-       };
-       IndexedPointInAreaLocator.prototype.getClass = function getClass () {
-         return IndexedPointInAreaLocator
-       };
-       staticAccessors$44.SegmentVisitor.get = function () { return SegmentVisitor };
-       staticAccessors$44.IntervalIndexedGeometry.get = function () { return IntervalIndexedGeometry };
+                     if (v) {
+                       partial.push(quote(k) + (gap ? ": " : ":") + v);
+                     }
+                   }
+                 }
+               } // Join all of the member texts together, separated with commas,
+               // and wrap them in braces.

 
 

-       Object.defineProperties( IndexedPointInAreaLocator, staticAccessors$44 );

 
 

-       var SegmentVisitor = function SegmentVisitor () {
-         this._counter = null;
-         var counter = arguments[0];
-         this._counter = counter;
-       };
-       SegmentVisitor.prototype.visitItem = function visitItem (item) {
-         var seg = item;
-         this._counter.countSegment(seg.getCoordinate(0), seg.getCoordinate(1));
-       };
-       SegmentVisitor.prototype.interfaces_ = function interfaces_ () {
-         return [ItemVisitor]
-       };
-       SegmentVisitor.prototype.getClass = function getClass () {
-         return SegmentVisitor
-       };
+               v = partial.length === 0 ? "{}" : gap ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}" : "{" + partial.join(",") + "}";
+               gap = mind;
+               return v;
+           }
+         } // If the JSON object does not yet have a stringify method, give it one.

 
 

-       var IntervalIndexedGeometry = function IntervalIndexedGeometry () {
-         this._index = new SortedPackedIntervalRTree();
-         var geom = arguments[0];
-         this.init(geom);
-       };
-       IntervalIndexedGeometry.prototype.init = function init (geom) {
-           var this$1 = this;

 
 

-         var lines = LinearComponentExtracter.getLines(geom);
-         for (var i = lines.iterator(); i.hasNext();) {
-           var line = i.next();
-           var pts = line.getCoordinates();
-           this$1.addLine(pts);
-         }
-       };
-       IntervalIndexedGeometry.prototype.addLine = function addLine (pts) {
-           var this$1 = this;
+         if (typeof JSON.stringify !== "function") {
+           meta = {
+             // table of character substitutions
+             "\b": "\\b",
+             "\t": "\\t",
+             "\n": "\\n",
+             "\f": "\\f",
+             "\r": "\\r",
+             "\"": "\\\"",
+             "\\": "\\\\"
+           };

 
 

-         for (var i = 1; i < pts.length; i++) {
-           var seg = new LineSegment(pts[i - 1], pts[i]);
-           var min = Math.min(seg.p0.y, seg.p1.y);
-           var max = Math.max(seg.p0.y, seg.p1.y);
-           this$1._index.insert(min, max, seg);
-         }
-       };
-       IntervalIndexedGeometry.prototype.query = function query () {
-         if (arguments.length === 2) {
-           var min = arguments[0];
-           var max = arguments[1];
-           var visitor = new ArrayListVisitor();
-           this._index.query(min, max, visitor);
-           return visitor.getItems()
-         } else if (arguments.length === 3) {
-           var min$1 = arguments[0];
-           var max$1 = arguments[1];
-           var visitor$1 = arguments[2];
-           this._index.query(min$1, max$1, visitor$1);
-         }
-       };
-       IntervalIndexedGeometry.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       IntervalIndexedGeometry.prototype.getClass = function getClass () {
-         return IntervalIndexedGeometry
-       };
+           JSON.stringify = function (value, replacer, space) {
+             // The stringify method takes a value and an optional replacer, and an optional
+             // space parameter, and returns a JSON text. The replacer can be a function
+             // that can replace values, or an array of strings that will select the keys.
+             // A default replacer method can be provided. Use of the space parameter can
+             // produce text that is more easily readable.
+             var i;
+             gap = "";
+             indent = ""; // If the space parameter is a number, make an indent string containing that
+             // many spaces.

 
 

-       var GeometryGraph = (function (PlanarGraph$$1) {
-         function GeometryGraph () {
-           PlanarGraph$$1.call(this);
-           this._parentGeom = null;
-           this._lineEdgeMap = new HashMap();
-           this._boundaryNodeRule = null;
-           this._useBoundaryDeterminationRule = true;
-           this._argIndex = null;
-           this._boundaryNodes = null;
-           this._hasTooFewPoints = false;
-           this._invalidPoint = null;
-           this._areaPtLocator = null;
-           this._ptLocator = new PointLocator();
-           if (arguments.length === 2) {
-             var argIndex = arguments[0];
-             var parentGeom = arguments[1];
-             var boundaryNodeRule = BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE;
-             this._argIndex = argIndex;
-             this._parentGeom = parentGeom;
-             this._boundaryNodeRule = boundaryNodeRule;
-             if (parentGeom !== null) {
-               this.add(parentGeom);
-             }
-           } else if (arguments.length === 3) {
-             var argIndex$1 = arguments[0];
-             var parentGeom$1 = arguments[1];
-             var boundaryNodeRule$1 = arguments[2];
-             this._argIndex = argIndex$1;
-             this._parentGeom = parentGeom$1;
-             this._boundaryNodeRule = boundaryNodeRule$1;
-             if (parentGeom$1 !== null) {
-               this.add(parentGeom$1);
-             }
-           }
-         }
-
-         if ( PlanarGraph$$1 ) { GeometryGraph.__proto__ = PlanarGraph$$1; }
-         GeometryGraph.prototype = Object.create( PlanarGraph$$1 && PlanarGraph$$1.prototype );
-         GeometryGraph.prototype.constructor = GeometryGraph;
-         GeometryGraph.prototype.insertBoundaryPoint = function insertBoundaryPoint (argIndex, coord) {
-           var n = this._nodes.addNode(coord);
-           var lbl = n.getLabel();
-           var boundaryCount = 1;
-           var loc = Location.NONE;
-           loc = lbl.getLocation(argIndex, Position.ON);
-           if (loc === Location.BOUNDARY) { boundaryCount++; }
-           var newLoc = GeometryGraph.determineBoundary(this._boundaryNodeRule, boundaryCount);
-           lbl.setLocation(argIndex, newLoc);
-         };
-         GeometryGraph.prototype.computeSelfNodes = function computeSelfNodes () {
-           if (arguments.length === 2) {
-             var li = arguments[0];
-             var computeRingSelfNodes = arguments[1];
-             return this.computeSelfNodes(li, computeRingSelfNodes, false)
-           } else if (arguments.length === 3) {
-             var li$1 = arguments[0];
-             var computeRingSelfNodes$1 = arguments[1];
-             var isDoneIfProperInt = arguments[2];
-             var si = new SegmentIntersector$2(li$1, true, false);
-             si.setIsDoneIfProperInt(isDoneIfProperInt);
-             var esi = this.createEdgeSetIntersector();
-             var isRings = this._parentGeom instanceof LinearRing || this._parentGeom instanceof Polygon || this._parentGeom instanceof MultiPolygon;
-             var computeAllSegments = computeRingSelfNodes$1 || !isRings;
-             esi.computeIntersections(this._edges, si, computeAllSegments);
-             this.addSelfIntersectionNodes(this._argIndex);
-             return si
-           }
-         };
-         GeometryGraph.prototype.computeSplitEdges = function computeSplitEdges (edgelist) {
-           for (var i = this._edges.iterator(); i.hasNext();) {
-             var e = i.next();
-             e.eiList.addSplitEdges(edgelist);
-           }
-         };
-         GeometryGraph.prototype.computeEdgeIntersections = function computeEdgeIntersections (g, li, includeProper) {
-           var si = new SegmentIntersector$2(li, includeProper, true);
-           si.setBoundaryNodes(this.getBoundaryNodes(), g.getBoundaryNodes());
-           var esi = this.createEdgeSetIntersector();
-           esi.computeIntersections(this._edges, g._edges, si);
-           return si
-         };
-         GeometryGraph.prototype.getGeometry = function getGeometry () {
-           return this._parentGeom
-         };
-         GeometryGraph.prototype.getBoundaryNodeRule = function getBoundaryNodeRule () {
-           return this._boundaryNodeRule
-         };
-         GeometryGraph.prototype.hasTooFewPoints = function hasTooFewPoints () {
-           return this._hasTooFewPoints
-         };
-         GeometryGraph.prototype.addPoint = function addPoint () {
-           if (arguments[0] instanceof Point$1) {
-             var p = arguments[0];
-             var coord = p.getCoordinate();
-             this.insertPoint(this._argIndex, coord, Location.INTERIOR);
-           } else if (arguments[0] instanceof Coordinate) {
-             var pt = arguments[0];
-             this.insertPoint(this._argIndex, pt, Location.INTERIOR);
-           }
-         };
-         GeometryGraph.prototype.addPolygon = function addPolygon (p) {
-           var this$1 = this;
-
-           this.addPolygonRing(p.getExteriorRing(), Location.EXTERIOR, Location.INTERIOR);
-           for (var i = 0; i < p.getNumInteriorRing(); i++) {
-             var hole = p.getInteriorRingN(i);
-             this$1.addPolygonRing(hole, Location.INTERIOR, Location.EXTERIOR);
-           }
-         };
-         GeometryGraph.prototype.addEdge = function addEdge (e) {
-           this.insertEdge(e);
-           var coord = e.getCoordinates();
-           this.insertPoint(this._argIndex, coord[0], Location.BOUNDARY);
-           this.insertPoint(this._argIndex, coord[coord.length - 1], Location.BOUNDARY);
-         };
-         GeometryGraph.prototype.addLineString = function addLineString (line) {
-           var coord = CoordinateArrays.removeRepeatedPoints(line.getCoordinates());
-           if (coord.length < 2) {
-             this._hasTooFewPoints = true;
-             this._invalidPoint = coord[0];
-             return null
-           }
-           var e = new Edge(coord, new Label(this._argIndex, Location.INTERIOR));
-           this._lineEdgeMap.put(line, e);
-           this.insertEdge(e);
-           Assert.isTrue(coord.length >= 2, 'found LineString with single point');
-           this.insertBoundaryPoint(this._argIndex, coord[0]);
-           this.insertBoundaryPoint(this._argIndex, coord[coord.length - 1]);
-         };
-         GeometryGraph.prototype.getInvalidPoint = function getInvalidPoint () {
-           return this._invalidPoint
-         };
-         GeometryGraph.prototype.getBoundaryPoints = function getBoundaryPoints () {
-           var coll = this.getBoundaryNodes();
-           var pts = new Array(coll.size()).fill(null);
-           var i = 0;
-           for (var it = coll.iterator(); it.hasNext();) {
-             var node = it.next();
-             pts[i++] = node.getCoordinate().copy();
-           }
-           return pts
-         };
-         GeometryGraph.prototype.getBoundaryNodes = function getBoundaryNodes () {
-           if (this._boundaryNodes === null) { this._boundaryNodes = this._nodes.getBoundaryNodes(this._argIndex); }
-           return this._boundaryNodes
-         };
-         GeometryGraph.prototype.addSelfIntersectionNode = function addSelfIntersectionNode (argIndex, coord, loc) {
-           if (this.isBoundaryNode(argIndex, coord)) { return null }
-           if (loc === Location.BOUNDARY && this._useBoundaryDeterminationRule) { this.insertBoundaryPoint(argIndex, coord); } else { this.insertPoint(argIndex, coord, loc); }
-         };
-         GeometryGraph.prototype.addPolygonRing = function addPolygonRing (lr, cwLeft, cwRight) {
-           if (lr.isEmpty()) { return null }
-           var coord = CoordinateArrays.removeRepeatedPoints(lr.getCoordinates());
-           if (coord.length < 4) {
-             this._hasTooFewPoints = true;
-             this._invalidPoint = coord[0];
-             return null
-           }
-           var left = cwLeft;
-           var right = cwRight;
-           if (CGAlgorithms.isCCW(coord)) {
-             left = cwRight;
-             right = cwLeft;
-           }
-           var e = new Edge(coord, new Label(this._argIndex, Location.BOUNDARY, left, right));
-           this._lineEdgeMap.put(lr, e);
-           this.insertEdge(e);
-           this.insertPoint(this._argIndex, coord[0], Location.BOUNDARY);
-         };
-         GeometryGraph.prototype.insertPoint = function insertPoint (argIndex, coord, onLocation) {
-           var n = this._nodes.addNode(coord);
-           var lbl = n.getLabel();
-           if (lbl === null) {
-             n._label = new Label(argIndex, onLocation);
-           } else { lbl.setLocation(argIndex, onLocation); }
-         };
-         GeometryGraph.prototype.createEdgeSetIntersector = function createEdgeSetIntersector () {
-           return new SimpleMCSweepLineIntersector()
-         };
-         GeometryGraph.prototype.addSelfIntersectionNodes = function addSelfIntersectionNodes (argIndex) {
-           var this$1 = this;
-
-           for (var i = this._edges.iterator(); i.hasNext();) {
-             var e = i.next();
-             var eLoc = e.getLabel().getLocation(argIndex);
-             for (var eiIt = e.eiList.iterator(); eiIt.hasNext();) {
-               var ei = eiIt.next();
-               this$1.addSelfIntersectionNode(argIndex, ei.coord, eLoc);
-             }
-           }
-         };
-         GeometryGraph.prototype.add = function add () {
-           if (arguments.length === 1) {
-             var g = arguments[0];
-             if (g.isEmpty()) { return null }
-             if (g instanceof MultiPolygon) { this._useBoundaryDeterminationRule = false; }
-             if (g instanceof Polygon) { this.addPolygon(g); }
-             else if (g instanceof LineString) { this.addLineString(g); }
-             else if (g instanceof Point$1) { this.addPoint(g); }
-             else if (g instanceof MultiPoint) { this.addCollection(g); }
-             else if (g instanceof MultiLineString) { this.addCollection(g); }
-             else if (g instanceof MultiPolygon) { this.addCollection(g); }
-             else if (g instanceof GeometryCollection) { this.addCollection(g); }
-             else { throw new Error(g.getClass().getName()) }
-           } else { return PlanarGraph$$1.prototype.add.apply(this, arguments) }
-         };
-         GeometryGraph.prototype.addCollection = function addCollection (gc) {
-           var this$1 = this;
-
-           for (var i = 0; i < gc.getNumGeometries(); i++) {
-             var g = gc.getGeometryN(i);
-             this$1.add(g);
-           }
-         };
-         GeometryGraph.prototype.locate = function locate (pt) {
-           if (hasInterface(this._parentGeom, Polygonal) && this._parentGeom.getNumGeometries() > 50) {
-             if (this._areaPtLocator === null) {
-               this._areaPtLocator = new IndexedPointInAreaLocator(this._parentGeom);
-             }
-             return this._areaPtLocator.locate(pt)
-           }
-           return this._ptLocator.locate(pt, this._parentGeom)
-         };
-         GeometryGraph.prototype.findEdge = function findEdge () {
-           if (arguments.length === 1) {
-             var line = arguments[0];
-             return this._lineEdgeMap.get(line)
-           } else { return PlanarGraph$$1.prototype.findEdge.apply(this, arguments) }
-         };
-         GeometryGraph.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         GeometryGraph.prototype.getClass = function getClass () {
-           return GeometryGraph
-         };
-         GeometryGraph.determineBoundary = function determineBoundary (boundaryNodeRule, boundaryCount) {
-           return boundaryNodeRule.isInBoundary(boundaryCount) ? Location.BOUNDARY : Location.INTERIOR
-         };
-
-         return GeometryGraph;
-       }(PlanarGraph));
-
-       var GeometryGraphOp = function GeometryGraphOp () {
-         this._li = new RobustLineIntersector();
-         this._resultPrecisionModel = null;
-         this._arg = null;
-         if (arguments.length === 1) {
-           var g0 = arguments[0];
-           this.setComputationPrecision(g0.getPrecisionModel());
-           this._arg = new Array(1).fill(null);
-           this._arg[0] = new GeometryGraph(0, g0);
-         } else if (arguments.length === 2) {
-           var g0$1 = arguments[0];
-           var g1 = arguments[1];
-           var boundaryNodeRule = BoundaryNodeRule.OGC_SFS_BOUNDARY_RULE;
-           if (g0$1.getPrecisionModel().compareTo(g1.getPrecisionModel()) >= 0) { this.setComputationPrecision(g0$1.getPrecisionModel()); } else { this.setComputationPrecision(g1.getPrecisionModel()); }
-           this._arg = new Array(2).fill(null);
-           this._arg[0] = new GeometryGraph(0, g0$1, boundaryNodeRule);
-           this._arg[1] = new GeometryGraph(1, g1, boundaryNodeRule);
-         } else if (arguments.length === 3) {
-           var g0$2 = arguments[0];
-           var g1$1 = arguments[1];
-           var boundaryNodeRule$1 = arguments[2];
-           if (g0$2.getPrecisionModel().compareTo(g1$1.getPrecisionModel()) >= 0) { this.setComputationPrecision(g0$2.getPrecisionModel()); } else { this.setComputationPrecision(g1$1.getPrecisionModel()); }
-           this._arg = new Array(2).fill(null);
-           this._arg[0] = new GeometryGraph(0, g0$2, boundaryNodeRule$1);
-           this._arg[1] = new GeometryGraph(1, g1$1, boundaryNodeRule$1);
-         }
-       };
-       GeometryGraphOp.prototype.getArgGeometry = function getArgGeometry (i) {
-         return this._arg[i].getGeometry()
-       };
-       GeometryGraphOp.prototype.setComputationPrecision = function setComputationPrecision (pm) {
-         this._resultPrecisionModel = pm;
-         this._li.setPrecisionModel(this._resultPrecisionModel);
-       };
-       GeometryGraphOp.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       GeometryGraphOp.prototype.getClass = function getClass () {
-         return GeometryGraphOp
-       };
+             if (typeof space === "number") {
+               for (i = 0; i < space; i += 1) {
+                 indent += " ";
+               } // If the space parameter is a string, it will be used as the indent string.

 
 

-       // operation.geometrygraph
+             } else if (typeof space === "string") {
+               indent = space;
+             } // If there is a replacer, it must be a function or an array.
+             // Otherwise, throw an error.

 
 

-       var GeometryMapper = function GeometryMapper () {};

 
 

-       GeometryMapper.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       GeometryMapper.prototype.getClass = function getClass () {
-         return GeometryMapper
-       };
-       GeometryMapper.map = function map () {
-         if (arguments[0] instanceof Geometry && hasInterface(arguments[1], GeometryMapper.MapOp)) {
-           var geom = arguments[0];
-           var op = arguments[1];
-           var mapped = new ArrayList();
-           for (var i = 0; i < geom.getNumGeometries(); i++) {
-             var g = op.map(geom.getGeometryN(i));
-             if (g !== null) { mapped.add(g); }
-           }
-           return geom.getFactory().buildGeometry(mapped)
-         } else if (hasInterface(arguments[0], Collection) && hasInterface(arguments[1], GeometryMapper.MapOp)) {
-           var geoms = arguments[0];
-           var op$1 = arguments[1];
-           var mapped$1 = new ArrayList();
-           for (var i$1 = geoms.iterator(); i$1.hasNext();) {
-             var g$1 = i$1.next();
-             var gr = op$1.map(g$1);
-             if (gr !== null) { mapped$1.add(gr); }
-           }
-           return mapped$1
-         }
-       };
-       GeometryMapper.MapOp = function MapOp () {};
-
-       var OverlayOp = (function (GeometryGraphOp) {
-         function OverlayOp () {
-           var g0 = arguments[0];
-           var g1 = arguments[1];
-           GeometryGraphOp.call(this, g0, g1);
-           this._ptLocator = new PointLocator();
-           this._geomFact = null;
-           this._resultGeom = null;
-           this._graph = null;
-           this._edgeList = new EdgeList();
-           this._resultPolyList = new ArrayList();
-           this._resultLineList = new ArrayList();
-           this._resultPointList = new ArrayList();
-           this._graph = new PlanarGraph(new OverlayNodeFactory());
-           this._geomFact = g0.getFactory();
-         }
-
-         if ( GeometryGraphOp ) { OverlayOp.__proto__ = GeometryGraphOp; }
-         OverlayOp.prototype = Object.create( GeometryGraphOp && GeometryGraphOp.prototype );
-         OverlayOp.prototype.constructor = OverlayOp;
-         OverlayOp.prototype.insertUniqueEdge = function insertUniqueEdge (e) {
-           var existingEdge = this._edgeList.findEqualEdge(e);
-           if (existingEdge !== null) {
-             var existingLabel = existingEdge.getLabel();
-             var labelToMerge = e.getLabel();
-             if (!existingEdge.isPointwiseEqual(e)) {
-               labelToMerge = new Label(e.getLabel());
-               labelToMerge.flip();
-             }
-             var depth = existingEdge.getDepth();
-             if (depth.isNull()) {
-               depth.add(existingLabel);
-             }
-             depth.add(labelToMerge);
-             existingLabel.merge(labelToMerge);
-           } else {
-             this._edgeList.add(e);
-           }
-         };
-         OverlayOp.prototype.getGraph = function getGraph () {
-           return this._graph
-         };
-         OverlayOp.prototype.cancelDuplicateResultEdges = function cancelDuplicateResultEdges () {
-           for (var it = this._graph.getEdgeEnds().iterator(); it.hasNext();) {
-             var de = it.next();
-             var sym = de.getSym();
-             if (de.isInResult() && sym.isInResult()) {
-               de.setInResult(false);
-               sym.setInResult(false);
-             }
-           }
-         };
-         OverlayOp.prototype.isCoveredByLA = function isCoveredByLA (coord) {
-           if (this.isCovered(coord, this._resultLineList)) { return true }
-           if (this.isCovered(coord, this._resultPolyList)) { return true }
-           return false
-         };
-         OverlayOp.prototype.computeGeometry = function computeGeometry (resultPointList, resultLineList, resultPolyList, opcode) {
-           var geomList = new ArrayList();
-           geomList.addAll(resultPointList);
-           geomList.addAll(resultLineList);
-           geomList.addAll(resultPolyList);
-           if (geomList.isEmpty()) { return OverlayOp.createEmptyResult(opcode, this._arg[0].getGeometry(), this._arg[1].getGeometry(), this._geomFact) }
-           return this._geomFact.buildGeometry(geomList)
-         };
-         OverlayOp.prototype.mergeSymLabels = function mergeSymLabels () {
-           for (var nodeit = this._graph.getNodes().iterator(); nodeit.hasNext();) {
-             var node = nodeit.next();
-             node.getEdges().mergeSymLabels();
-           }
-         };
-         OverlayOp.prototype.isCovered = function isCovered (coord, geomList) {
-           var this$1 = this;
-
-           for (var it = geomList.iterator(); it.hasNext();) {
-             var geom = it.next();
-             var loc = this$1._ptLocator.locate(coord, geom);
-             if (loc !== Location.EXTERIOR) { return true }
-           }
-           return false
-         };
-         OverlayOp.prototype.replaceCollapsedEdges = function replaceCollapsedEdges () {
-           var newEdges = new ArrayList();
-           for (var it = this._edgeList.iterator(); it.hasNext();) {
-             var e = it.next();
-             if (e.isCollapsed()) {
-               it.remove();
-               newEdges.add(e.getCollapsedEdge());
-             }
-           }
-           this._edgeList.addAll(newEdges);
-         };
-         OverlayOp.prototype.updateNodeLabelling = function updateNodeLabelling () {
-           for (var nodeit = this._graph.getNodes().iterator(); nodeit.hasNext();) {
-             var node = nodeit.next();
-             var lbl = node.getEdges().getLabel();
-             node.getLabel().merge(lbl);
-           }
-         };
-         OverlayOp.prototype.getResultGeometry = function getResultGeometry (overlayOpCode) {
-           this.computeOverlay(overlayOpCode);
-           return this._resultGeom
-         };
-         OverlayOp.prototype.insertUniqueEdges = function insertUniqueEdges (edges) {
-           var this$1 = this;
-
-           for (var i = edges.iterator(); i.hasNext();) {
-             var e = i.next();
-             this$1.insertUniqueEdge(e);
-           }
-         };
-         OverlayOp.prototype.computeOverlay = function computeOverlay (opCode) {
-           this.copyPoints(0);
-           this.copyPoints(1);
-           this._arg[0].computeSelfNodes(this._li, false);
-           this._arg[1].computeSelfNodes(this._li, false);
-           this._arg[0].computeEdgeIntersections(this._arg[1], this._li, true);
-           var baseSplitEdges = new ArrayList();
-           this._arg[0].computeSplitEdges(baseSplitEdges);
-           this._arg[1].computeSplitEdges(baseSplitEdges);
-           // const splitEdges = baseSplitEdges
-           this.insertUniqueEdges(baseSplitEdges);
-           this.computeLabelsFromDepths();
-           this.replaceCollapsedEdges();
-           EdgeNodingValidator.checkValid(this._edgeList.getEdges());
-           this._graph.addEdges(this._edgeList.getEdges());
-           this.computeLabelling();
-           this.labelIncompleteNodes();
-           this.findResultAreaEdges(opCode);
-           this.cancelDuplicateResultEdges();
-           var polyBuilder = new PolygonBuilder(this._geomFact);
-           polyBuilder.add(this._graph);
-           this._resultPolyList = polyBuilder.getPolygons();
-           var lineBuilder = new LineBuilder(this, this._geomFact, this._ptLocator);
-           this._resultLineList = lineBuilder.build(opCode);
-           var pointBuilder = new PointBuilder(this, this._geomFact, this._ptLocator);
-           this._resultPointList = pointBuilder.build(opCode);
-           this._resultGeom = this.computeGeometry(this._resultPointList, this._resultLineList, this._resultPolyList, opCode);
-         };
-         OverlayOp.prototype.labelIncompleteNode = function labelIncompleteNode (n, targetIndex) {
-           var loc = this._ptLocator.locate(n.getCoordinate(), this._arg[targetIndex].getGeometry());
-           n.getLabel().setLocation(targetIndex, loc);
-         };
-         OverlayOp.prototype.copyPoints = function copyPoints (argIndex) {
-           var this$1 = this;
-
-           for (var i = this._arg[argIndex].getNodeIterator(); i.hasNext();) {
-             var graphNode = i.next();
-             var newNode = this$1._graph.addNode(graphNode.getCoordinate());
-             newNode.setLabel(argIndex, graphNode.getLabel().getLocation(argIndex));
-           }
-         };
-         OverlayOp.prototype.findResultAreaEdges = function findResultAreaEdges (opCode) {
-           for (var it = this._graph.getEdgeEnds().iterator(); it.hasNext();) {
-             var de = it.next();
-             var label = de.getLabel();
-             if (label.isArea() && !de.isInteriorAreaEdge() && OverlayOp.isResultOfOp(label.getLocation(0, Position.RIGHT), label.getLocation(1, Position.RIGHT), opCode)) {
-               de.setInResult(true);
-             }
-           }
-         };
-         OverlayOp.prototype.computeLabelsFromDepths = function computeLabelsFromDepths () {
-           for (var it = this._edgeList.iterator(); it.hasNext();) {
-             var e = it.next();
-             var lbl = e.getLabel();
-             var depth = e.getDepth();
-             if (!depth.isNull()) {
-               depth.normalize();
-               for (var i = 0; i < 2; i++) {
-                 if (!lbl.isNull(i) && lbl.isArea() && !depth.isNull(i)) {
-                   if (depth.getDelta(i) === 0) {
-                     lbl.toLine(i);
-                   } else {
-                     Assert.isTrue(!depth.isNull(i, Position.LEFT), 'depth of LEFT side has not been initialized');
-                     lbl.setLocation(i, Position.LEFT, depth.getLocation(i, Position.LEFT));
-                     Assert.isTrue(!depth.isNull(i, Position.RIGHT), 'depth of RIGHT side has not been initialized');
-                     lbl.setLocation(i, Position.RIGHT, depth.getLocation(i, Position.RIGHT));
-                   }
-                 }
-               }
-             }
-           }
-         };
-         OverlayOp.prototype.computeLabelling = function computeLabelling () {
-           var this$1 = this;
+             rep = replacer;

 
 

-           for (var nodeit = this._graph.getNodes().iterator(); nodeit.hasNext();) {
-             var node = nodeit.next();
-             node.getEdges().computeLabelling(this$1._arg);
-           }
-           this.mergeSymLabels();
-           this.updateNodeLabelling();
-         };
-         OverlayOp.prototype.labelIncompleteNodes = function labelIncompleteNodes () {
-           var this$1 = this;
+             if (replacer && typeof replacer !== "function" && (_typeof(replacer) !== "object" || typeof replacer.length !== "number")) {
+               throw new Error("JSON.stringify");
+             } // Make a fake root object containing our value under the key of "".
+             // Return the result of stringifying the value.

 
 

-           // let nodeCount = 0
-           for (var ni = this._graph.getNodes().iterator(); ni.hasNext();) {
-             var n = ni.next();
-             var label = n.getLabel();
-             if (n.isIsolated()) {
-               // nodeCount++
-               if (label.isNull(0)) { this$1.labelIncompleteNode(n, 0); } else { this$1.labelIncompleteNode(n, 1); }
-             }
-             n.getEdges().updateLabelling(label);
-           }
-         };
-         OverlayOp.prototype.isCoveredByA = function isCoveredByA (coord) {
-           if (this.isCovered(coord, this._resultPolyList)) { return true }
-           return false
-         };
-         OverlayOp.prototype.interfaces_ = function interfaces_ () {
-           return []
-         };
-         OverlayOp.prototype.getClass = function getClass () {
-           return OverlayOp
-         };

 
 

-         return OverlayOp;
-       }(GeometryGraphOp));
+             return str("", {
+               "": value
+             });
+           };
+         } // If the JSON object does not yet have a parse method, give it one.

 
 

-       OverlayOp.overlayOp = function (geom0, geom1, opCode) {
-         var gov = new OverlayOp(geom0, geom1);
-         var geomOv = gov.getResultGeometry(opCode);
-         return geomOv
-       };
-       OverlayOp.intersection = function (g, other) {
-         if (g.isEmpty() || other.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.INTERSECTION, g, other, g.getFactory()) }
-         if (g.isGeometryCollection()) {
-           var g2 = other;
-           return GeometryCollectionMapper.map(g, {
-             interfaces_: function () {
-               return [GeometryMapper.MapOp]
-             },
-             map: function (g) {
-               return g.intersection(g2)
-             }
-           })
-         }
-         g.checkNotGeometryCollection(g);
-         g.checkNotGeometryCollection(other);
-         return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.INTERSECTION)
-       };
-       OverlayOp.symDifference = function (g, other) {
-         if (g.isEmpty() || other.isEmpty()) {
-           if (g.isEmpty() && other.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.SYMDIFFERENCE, g, other, g.getFactory()) }
-           if (g.isEmpty()) { return other.copy() }
-           if (other.isEmpty()) { return g.copy() }
-         }
-         g.checkNotGeometryCollection(g);
-         g.checkNotGeometryCollection(other);
-         return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.SYMDIFFERENCE)
-       };
-       OverlayOp.resultDimension = function (opCode, g0, g1) {
-         var dim0 = g0.getDimension();
-         var dim1 = g1.getDimension();
-         var resultDimension = -1;
-         switch (opCode) {
-           case OverlayOp.INTERSECTION:
-             resultDimension = Math.min(dim0, dim1);
-             break
-           case OverlayOp.UNION:
-             resultDimension = Math.max(dim0, dim1);
-             break
-           case OverlayOp.DIFFERENCE:
-             resultDimension = dim0;
-             break
-           case OverlayOp.SYMDIFFERENCE:
-             resultDimension = Math.max(dim0, dim1);
-             break
-         }
-         return resultDimension
-       };
-       OverlayOp.createEmptyResult = function (overlayOpCode, a, b, geomFact) {
-         var result = null;
-         switch (OverlayOp.resultDimension(overlayOpCode, a, b)) {
-           case -1:
-             result = geomFact.createGeometryCollection(new Array(0).fill(null));
-             break
-           case 0:
-             result = geomFact.createPoint();
-             break
-           case 1:
-             result = geomFact.createLineString();
-             break
-           case 2:
-             result = geomFact.createPolygon();
-             break
-         }
-         return result
-       };
-       OverlayOp.difference = function (g, other) {
-         if (g.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.DIFFERENCE, g, other, g.getFactory()) }
-         if (other.isEmpty()) { return g.copy() }
-         g.checkNotGeometryCollection(g);
-         g.checkNotGeometryCollection(other);
-         return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.DIFFERENCE)
-       };
-       OverlayOp.isResultOfOp = function () {
-         if (arguments.length === 2) {
-           var label = arguments[0];
-           var opCode = arguments[1];
-           var loc0 = label.getLocation(0);
-           var loc1 = label.getLocation(1);
-           return OverlayOp.isResultOfOp(loc0, loc1, opCode)
-         } else if (arguments.length === 3) {
-           var loc0$1 = arguments[0];
-           var loc1$1 = arguments[1];
-           var overlayOpCode = arguments[2];
-           if (loc0$1 === Location.BOUNDARY) { loc0$1 = Location.INTERIOR; }
-           if (loc1$1 === Location.BOUNDARY) { loc1$1 = Location.INTERIOR; }
-           switch (overlayOpCode) {
-             case OverlayOp.INTERSECTION:
-               return loc0$1 === Location.INTERIOR && loc1$1 === Location.INTERIOR
-             case OverlayOp.UNION:
-               return loc0$1 === Location.INTERIOR || loc1$1 === Location.INTERIOR
-             case OverlayOp.DIFFERENCE:
-               return loc0$1 === Location.INTERIOR && loc1$1 !== Location.INTERIOR
-             case OverlayOp.SYMDIFFERENCE:
-               return (loc0$1 === Location.INTERIOR && loc1$1 !== Location.INTERIOR) || (loc0$1 !== Location.INTERIOR && loc1$1 === Location.INTERIOR)
-           }
-           return false
-         }
-       };
-       OverlayOp.INTERSECTION = 1;
-       OverlayOp.UNION = 2;
-       OverlayOp.DIFFERENCE = 3;
-       OverlayOp.SYMDIFFERENCE = 4;
-
-       var FuzzyPointLocator = function FuzzyPointLocator () {
-         this._g = null;
-         this._boundaryDistanceTolerance = null;
-         this._linework = null;
-         this._ptLocator = new PointLocator();
-         this._seg = new LineSegment();
-         var g = arguments[0];
-         var boundaryDistanceTolerance = arguments[1];
-         this._g = g;
-         this._boundaryDistanceTolerance = boundaryDistanceTolerance;
-         this._linework = this.extractLinework(g);
-       };
-       FuzzyPointLocator.prototype.isWithinToleranceOfBoundary = function isWithinToleranceOfBoundary (pt) {
-           var this$1 = this;

 
 

-         for (var i = 0; i < this._linework.getNumGeometries(); i++) {
-           var line = this$1._linework.getGeometryN(i);
-           var seq = line.getCoordinateSequence();
-           for (var j = 0; j < seq.size() - 1; j++) {
-             seq.getCoordinate(j, this$1._seg.p0);
-             seq.getCoordinate(j + 1, this$1._seg.p1);
-             var dist = this$1._seg.distance(pt);
-             if (dist <= this$1._boundaryDistanceTolerance) { return true }
-           }
-         }
-         return false
-       };
-       FuzzyPointLocator.prototype.getLocation = function getLocation (pt) {
-         if (this.isWithinToleranceOfBoundary(pt)) { return Location.BOUNDARY }
-         return this._ptLocator.locate(pt, this._g)
-       };
-       FuzzyPointLocator.prototype.extractLinework = function extractLinework (g) {
-         var extracter = new PolygonalLineworkExtracter();
-         g.apply(extracter);
-         var linework = extracter.getLinework();
-         var lines = GeometryFactory.toLineStringArray(linework);
-         return g.getFactory().createMultiLineString(lines)
-       };
-       FuzzyPointLocator.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       FuzzyPointLocator.prototype.getClass = function getClass () {
-         return FuzzyPointLocator
-       };
+         if (typeof JSON.parse !== "function") {
+           JSON.parse = function (text, reviver) {
+             // The parse method takes a text and an optional reviver function, and returns
+             // a JavaScript value if the text is a valid JSON text.
+             var j;

 
 

-       var PolygonalLineworkExtracter = function PolygonalLineworkExtracter () {
-         this._linework = null;
-         this._linework = new ArrayList();
-       };
-       PolygonalLineworkExtracter.prototype.getLinework = function getLinework () {
-         return this._linework
-       };
-       PolygonalLineworkExtracter.prototype.filter = function filter (g) {
-           var this$1 = this;
+             function walk(holder, key) {
+               // The walk method is used to recursively walk the resulting structure so
+               // that modifications can be made.
+               var k;
+               var v;
+               var value = holder[key];

 
 

-         if (g instanceof Polygon) {
-           var poly = g;
-           this._linework.add(poly.getExteriorRing());
-           for (var i = 0; i < poly.getNumInteriorRing(); i++) {
-             this$1._linework.add(poly.getInteriorRingN(i));
-           }
-         }
-       };
-       PolygonalLineworkExtracter.prototype.interfaces_ = function interfaces_ () {
-         return [GeometryFilter]
-       };
-       PolygonalLineworkExtracter.prototype.getClass = function getClass () {
-         return PolygonalLineworkExtracter
-       };
+               if (value && _typeof(value) === "object") {
+                 for (k in value) {
+                   if (Object.prototype.hasOwnProperty.call(value, k)) {
+                     v = walk(value, k);

 
 

-       var OffsetPointGenerator = function OffsetPointGenerator () {
-         this._g = null;
-         this._doLeft = true;
-         this._doRight = true;
-         var g = arguments[0];
-         this._g = g;
-       };
-       OffsetPointGenerator.prototype.extractPoints = function extractPoints (line, offsetDistance, offsetPts) {
-           var this$1 = this;
+                     if (v !== undefined) {
+                       value[k] = v;
+                     } else {
+                       delete value[k];
+                     }
+                   }
+                 }
+               }

 
 

-         var pts = line.getCoordinates();
-         for (var i = 0; i < pts.length - 1; i++) {
-           this$1.computeOffsetPoints(pts[i], pts[i + 1], offsetDistance, offsetPts);
-         }
-       };
-       OffsetPointGenerator.prototype.setSidesToGenerate = function setSidesToGenerate (doLeft, doRight) {
-         this._doLeft = doLeft;
-         this._doRight = doRight;
-       };
-       OffsetPointGenerator.prototype.getPoints = function getPoints (offsetDistance) {
-           var this$1 = this;
+               return reviver.call(holder, key, value);
+             } // Parsing happens in four stages. In the first stage, we replace certain
+             // Unicode characters with escape sequences. JavaScript handles many characters
+             // incorrectly, either silently deleting them, or treating them as line endings.

 
 

-         var offsetPts = new ArrayList();
-         var lines = LinearComponentExtracter.getLines(this._g);
-         for (var i = lines.iterator(); i.hasNext();) {
-           var line = i.next();
-           this$1.extractPoints(line, offsetDistance, offsetPts);
-         }
-         return offsetPts
-       };
-       OffsetPointGenerator.prototype.computeOffsetPoints = function computeOffsetPoints (p0, p1, offsetDistance, offsetPts) {
-         var dx = p1.x - p0.x;
-         var dy = p1.y - p0.y;
-         var len = Math.sqrt(dx * dx + dy * dy);
-         var ux = offsetDistance * dx / len;
-         var uy = offsetDistance * dy / len;
-         var midX = (p1.x + p0.x) / 2;
-         var midY = (p1.y + p0.y) / 2;
-         if (this._doLeft) {
-           var offsetLeft = new Coordinate(midX - uy, midY + ux);
-           offsetPts.add(offsetLeft);
-         }
-         if (this._doRight) {
-           var offsetRight = new Coordinate(midX + uy, midY - ux);
-           offsetPts.add(offsetRight);
-         }
-       };
-       OffsetPointGenerator.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       OffsetPointGenerator.prototype.getClass = function getClass () {
-         return OffsetPointGenerator
-       };

 
 

-       var OverlayResultValidator = function OverlayResultValidator () {
-         this._geom = null;
-         this._locFinder = null;
-         this._location = new Array(3).fill(null);
-         this._invalidLocation = null;
-         this._boundaryDistanceTolerance = OverlayResultValidator.TOLERANCE;
-         this._testCoords = new ArrayList();
-         var a = arguments[0];
-         var b = arguments[1];
-         var result = arguments[2];
-         this._boundaryDistanceTolerance = OverlayResultValidator.computeBoundaryDistanceTolerance(a, b);
-         this._geom = [a, b, result];
-         this._locFinder = [new FuzzyPointLocator(this._geom[0], this._boundaryDistanceTolerance), new FuzzyPointLocator(this._geom[1], this._boundaryDistanceTolerance), new FuzzyPointLocator(this._geom[2], this._boundaryDistanceTolerance)];
-       };
+             text = String(text);
+             rx_dangerous.lastIndex = 0;

 
 

-       var staticAccessors$46 = { TOLERANCE: { configurable: true } };
-       OverlayResultValidator.prototype.reportResult = function reportResult (overlayOp, location, expectedInterior) {
-         System.out.println('Overlay result invalid - A:' + Location.toLocationSymbol(location[0]) + ' B:' + Location.toLocationSymbol(location[1]) + ' expected:' + (expectedInterior ? 'i' : 'e') + ' actual:' + Location.toLocationSymbol(location[2]));
-       };
-       OverlayResultValidator.prototype.isValid = function isValid (overlayOp) {
-         this.addTestPts(this._geom[0]);
-         this.addTestPts(this._geom[1]);
-         var isValid = this.checkValid(overlayOp);
-         return isValid
-       };
-       OverlayResultValidator.prototype.checkValid = function checkValid () {
-           var this$1 = this;
+             if (rx_dangerous.test(text)) {
+               text = text.replace(rx_dangerous, function (a) {
+                 return "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
+               });
+             } // In the second stage, we run the text against regular expressions that look
+             // for non-JSON patterns. We are especially concerned with "()" and "new"
+             // because they can cause invocation, and "=" because it can cause mutation.
+             // But just to be safe, we want to reject all unexpected forms.
+             // We split the second stage into 4 regexp operations in order to work around
+             // crippling inefficiencies in IE's and Safari's regexp engines. First we
+             // replace the JSON backslash pairs with "@" (a non-JSON character). Second, we
+             // replace all simple value tokens with "]" characters. Third, we delete all
+             // open brackets that follow a colon or comma or that begin the text. Finally,
+             // we look to see that the remaining characters are only whitespace or "]" or
+             // "," or ":" or "{" or "}". If that is so, then the text is safe for eval.

 
 

-         if (arguments.length === 1) {
-           var overlayOp = arguments[0];
-           for (var i = 0; i < this._testCoords.size(); i++) {
-             var pt = this$1._testCoords.get(i);
-             if (!this$1.checkValid(overlayOp, pt)) {
-               this$1._invalidLocation = pt;
-               return false
-             }
-           }
-           return true
-         } else if (arguments.length === 2) {
-           var overlayOp$1 = arguments[0];
-           var pt$1 = arguments[1];
-           this._location[0] = this._locFinder[0].getLocation(pt$1);
-           this._location[1] = this._locFinder[1].getLocation(pt$1);
-           this._location[2] = this._locFinder[2].getLocation(pt$1);
-           if (OverlayResultValidator.hasLocation(this._location, Location.BOUNDARY)) { return true }
-           return this.isValidResult(overlayOp$1, this._location)
-         }
-       };
-       OverlayResultValidator.prototype.addTestPts = function addTestPts (g) {
-         var ptGen = new OffsetPointGenerator(g);
-         this._testCoords.addAll(ptGen.getPoints(5 * this._boundaryDistanceTolerance));
-       };
-       OverlayResultValidator.prototype.isValidResult = function isValidResult (overlayOp, location) {
-         var expectedInterior = OverlayOp.isResultOfOp(location[0], location[1], overlayOp);
-         var resultInInterior = location[2] === Location.INTERIOR;
-         var isValid = !(expectedInterior ^ resultInInterior);
-         if (!isValid) { this.reportResult(overlayOp, location, expectedInterior); }
-         return isValid
-       };
-       OverlayResultValidator.prototype.getInvalidLocation = function getInvalidLocation () {
-         return this._invalidLocation
-       };
-       OverlayResultValidator.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       OverlayResultValidator.prototype.getClass = function getClass () {
-         return OverlayResultValidator
-       };
-       OverlayResultValidator.hasLocation = function hasLocation (location, loc) {
-         for (var i = 0; i < 3; i++) {
-           if (location[i] === loc) { return true }
-         }
-         return false
-       };
-       OverlayResultValidator.computeBoundaryDistanceTolerance = function computeBoundaryDistanceTolerance (g0, g1) {
-         return Math.min(GeometrySnapper.computeSizeBasedSnapTolerance(g0), GeometrySnapper.computeSizeBasedSnapTolerance(g1))
-       };
-       OverlayResultValidator.isValid = function isValid (a, b, overlayOp, result) {
-         var validator = new OverlayResultValidator(a, b, result);
-         return validator.isValid(overlayOp)
-       };
-       staticAccessors$46.TOLERANCE.get = function () { return 0.000001 };

 
 

-       Object.defineProperties( OverlayResultValidator, staticAccessors$46 );
+             if (rx_one.test(text.replace(rx_two, "@").replace(rx_three, "]").replace(rx_four, ""))) {
+               // In the third stage we use the eval function to compile the text into a
+               // JavaScript structure. The "{" operator is subject to a syntactic ambiguity
+               // in JavaScript: it can begin a block or an object literal. We wrap the text
+               // in parens to eliminate the ambiguity.
+               j = eval("(" + text + ")"); // In the optional fourth stage, we recursively walk the new structure, passing
+               // each name/value pair to a reviver function for possible transformation.

 
 

-       // operation.overlay
+               return typeof reviver === "function" ? walk({
+                 "": j
+               }, "") : j;
+             } // If the text is not JSON parseable, then a SyntaxError is thrown.

 
 

-       var GeometryCombiner = function GeometryCombiner (geoms) {
-         this._geomFactory = null;
-         this._skipEmpty = false;
-         this._inputGeoms = null;
-         this._geomFactory = GeometryCombiner.extractFactory(geoms);
-         this._inputGeoms = geoms;
-       };
-       GeometryCombiner.prototype.extractElements = function extractElements (geom, elems) {
-           var this$1 = this;

 
 

-         if (geom === null) { return null }
-         for (var i = 0; i < geom.getNumGeometries(); i++) {
-           var elemGeom = geom.getGeometryN(i);
-           if (this$1._skipEmpty && elemGeom.isEmpty()) { continue }
-           elems.add(elemGeom);
+             throw new SyntaxError("JSON.parse");
+           };

          }
          }

-       };
-       GeometryCombiner.prototype.combine = function combine () {
-           var this$1 = this;
+       })();

 
 

-         var elems = new ArrayList();
-         for (var i = this._inputGeoms.iterator(); i.hasNext();) {
-           var g = i.next();
-           this$1.extractElements(g, elems);
-         }
-         if (elems.size() === 0) {
-           if (this._geomFactory !== null) {
-             return this._geomFactory.createGeometryCollection(null)
-           }
-           return null
-         }
-         return this._geomFactory.buildGeometry(elems)
-       };
-       GeometryCombiner.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       GeometryCombiner.prototype.getClass = function getClass () {
-         return GeometryCombiner
-       };
-       GeometryCombiner.combine = function combine () {
-         if (arguments.length === 1) {
-           var geoms = arguments[0];
-           var combiner = new GeometryCombiner(geoms);
-           return combiner.combine()
-         } else if (arguments.length === 2) {
-           var g0 = arguments[0];
-           var g1 = arguments[1];
-           var combiner$1 = new GeometryCombiner(GeometryCombiner.createList(g0, g1));
-           return combiner$1.combine()
-         } else if (arguments.length === 3) {
-           var g0$1 = arguments[0];
-           var g1$1 = arguments[1];
-           var g2 = arguments[2];
-           var combiner$2 = new GeometryCombiner(GeometryCombiner.createList(g0$1, g1$1, g2));
-           return combiner$2.combine()
-         }
-       };
-       GeometryCombiner.extractFactory = function extractFactory (geoms) {
-         if (geoms.isEmpty()) { return null }
-         return geoms.iterator().next().getFactory()
-       };
-       GeometryCombiner.createList = function createList () {
-         if (arguments.length === 2) {
-           var obj0 = arguments[0];
-           var obj1 = arguments[1];
-           var list = new ArrayList();
-           list.add(obj0);
-           list.add(obj1);
-           return list
-         } else if (arguments.length === 3) {
-           var obj0$1 = arguments[0];
-           var obj1$1 = arguments[1];
-           var obj2 = arguments[2];
-           var list$1 = new ArrayList();
-           list$1.add(obj0$1);
-           list$1.add(obj1$1);
-           list$1.add(obj2);
-           return list$1
-         }
-       };
+       var json2 = json2Plugin;

 
 

-       var CascadedPolygonUnion = function CascadedPolygonUnion () {
-         this._inputPolys = null;
-         this._geomFactory = null;
-         var polys = arguments[0];
-         this._inputPolys = polys;
-         if (this._inputPolys === null) { this._inputPolys = new ArrayList(); }
-       };
+       function json2Plugin() {
+         return {};
+       }

 
 

-       var staticAccessors$47 = { STRTREE_NODE_CAPACITY: { configurable: true } };
-       CascadedPolygonUnion.prototype.reduceToGeometries = function reduceToGeometries (geomTree) {
-           var this$1 = this;
+       var engine = storeEngine;
+       var storages = all;
+       var plugins = [json2];
+       var store_legacy = engine.createStore(storages, plugins);

 
 

-         var geoms = new ArrayList();
-         for (var i = geomTree.iterator(); i.hasNext();) {
-           var o = i.next();
-           var geom = null;
-           if (hasInterface(o, List)) {
-             geom = this$1.unionTree(o);
-           } else if (o instanceof Geometry) {
-             geom = o;
-           }
-           geoms.add(geom);
-         }
-         return geoms
-       };
-       CascadedPolygonUnion.prototype.extractByEnvelope = function extractByEnvelope (env, geom, disjointGeoms) {
-         var intersectingGeoms = new ArrayList();
-         for (var i = 0; i < geom.getNumGeometries(); i++) {
-           var elem = geom.getGeometryN(i);
-           if (elem.getEnvelopeInternal().intersects(env)) { intersectingGeoms.add(elem); } else { disjointGeoms.add(elem); }
-         }
-         return this._geomFactory.buildGeometry(intersectingGeoms)
-       };
-       CascadedPolygonUnion.prototype.unionOptimized = function unionOptimized (g0, g1) {
-         var g0Env = g0.getEnvelopeInternal();
-         var g1Env = g1.getEnvelopeInternal();
-         if (!g0Env.intersects(g1Env)) {
-           var combo = GeometryCombiner.combine(g0, g1);
-           return combo
-         }
-         if (g0.getNumGeometries() <= 1 && g1.getNumGeometries() <= 1) { return this.unionActual(g0, g1) }
-         var commonEnv = g0Env.intersection(g1Env);
-         return this.unionUsingEnvelopeIntersection(g0, g1, commonEnv)
-       };
-       CascadedPolygonUnion.prototype.union = function union () {
-         if (this._inputPolys === null) { throw new Error('union() method cannot be called twice') }
-         if (this._inputPolys.isEmpty()) { return null }
-         this._geomFactory = this._inputPolys.iterator().next().getFactory();
-         var index = new STRtree(CascadedPolygonUnion.STRTREE_NODE_CAPACITY);
-         for (var i = this._inputPolys.iterator(); i.hasNext();) {
-           var item = i.next();
-           index.insert(item.getEnvelopeInternal(), item);
-         }
-         this._inputPolys = null;
-         var itemTree = index.itemsTree();
-         var unionAll = this.unionTree(itemTree);
-         return unionAll
-       };
-       CascadedPolygonUnion.prototype.binaryUnion = function binaryUnion () {
-         if (arguments.length === 1) {
-           var geoms = arguments[0];
-           return this.binaryUnion(geoms, 0, geoms.size())
-         } else if (arguments.length === 3) {
-           var geoms$1 = arguments[0];
-           var start = arguments[1];
-           var end = arguments[2];
-           if (end - start <= 1) {
-             var g0 = CascadedPolygonUnion.getGeometry(geoms$1, start);
-             return this.unionSafe(g0, null)
-           } else if (end - start === 2) {
-             return this.unionSafe(CascadedPolygonUnion.getGeometry(geoms$1, start), CascadedPolygonUnion.getGeometry(geoms$1, start + 1))
-           } else {
-             var mid = Math.trunc((end + start) / 2);
-             var g0$1 = this.binaryUnion(geoms$1, start, mid);
-             var g1 = this.binaryUnion(geoms$1, mid, end);
-             return this.unionSafe(g0$1, g1)
+       var immutable = extend;
+       var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+       function extend() {
+         var target = {};
+
+         for (var i = 0; i < arguments.length; i++) {
+           var source = arguments[i];
+
+           for (var key in source) {
+             if (hasOwnProperty.call(source, key)) {
+               target[key] = source[key];
+             }

            }
          }
            }
          }

-       };
-       CascadedPolygonUnion.prototype.repeatedUnion = function repeatedUnion (geoms) {
-         var union = null;
-         for (var i = geoms.iterator(); i.hasNext();) {
-           var g = i.next();
-           if (union === null) { union = g.copy(); } else { union = union.union(g); }
-         }
-         return union
-       };
-       CascadedPolygonUnion.prototype.unionSafe = function unionSafe (g0, g1) {
-         if (g0 === null && g1 === null) { return null }
-         if (g0 === null) { return g1.copy() }
-         if (g1 === null) { return g0.copy() }
-         return this.unionOptimized(g0, g1)
-       };
-       CascadedPolygonUnion.prototype.unionActual = function unionActual (g0, g1) {
-         return CascadedPolygonUnion.restrictToPolygons(g0.union(g1))
-       };
-       CascadedPolygonUnion.prototype.unionTree = function unionTree (geomTree) {
-         var geoms = this.reduceToGeometries(geomTree);
-         var union = this.binaryUnion(geoms);
-         return union
-       };
-       CascadedPolygonUnion.prototype.unionUsingEnvelopeIntersection = function unionUsingEnvelopeIntersection (g0, g1, common) {
-         var disjointPolys = new ArrayList();
-         var g0Int = this.extractByEnvelope(common, g0, disjointPolys);
-         var g1Int = this.extractByEnvelope(common, g1, disjointPolys);
-         var union = this.unionActual(g0Int, g1Int);
-         disjointPolys.add(union);
-         var overallUnion = GeometryCombiner.combine(disjointPolys);
-         return overallUnion
-       };
-       CascadedPolygonUnion.prototype.bufferUnion = function bufferUnion () {
-         if (arguments.length === 1) {
-           var geoms = arguments[0];
-           var factory = geoms.get(0).getFactory();
-           var gColl = factory.buildGeometry(geoms);
-           var unionAll = gColl.buffer(0.0);
-           return unionAll
-         } else if (arguments.length === 2) {
-           var g0 = arguments[0];
-           var g1 = arguments[1];
-           var factory$1 = g0.getFactory();
-           var gColl$1 = factory$1.createGeometryCollection([g0, g1]);
-           var unionAll$1 = gColl$1.buffer(0.0);
-           return unionAll$1
-         }
-       };
-       CascadedPolygonUnion.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       CascadedPolygonUnion.prototype.getClass = function getClass () {
-         return CascadedPolygonUnion
-       };
-       CascadedPolygonUnion.restrictToPolygons = function restrictToPolygons (g) {
-         if (hasInterface(g, Polygonal)) {
-           return g
-         }
-         var polygons = PolygonExtracter.getPolygons(g);
-         if (polygons.size() === 1) { return polygons.get(0) }
-         return g.getFactory().createMultiPolygon(GeometryFactory.toPolygonArray(polygons))
-       };
-       CascadedPolygonUnion.getGeometry = function getGeometry (list, index) {
-         if (index >= list.size()) { return null }
-         return list.get(index)
-       };
-       CascadedPolygonUnion.union = function union (polys) {
-         var op = new CascadedPolygonUnion(polys);
-         return op.union()
-       };
-       staticAccessors$47.STRTREE_NODE_CAPACITY.get = function () { return 4 };

 
 

-       Object.defineProperties( CascadedPolygonUnion, staticAccessors$47 );
+         return target;
+       }

 
 

-       var UnionOp = function UnionOp () {};
+       var ohauth = ohauth_1;
+       var resolveUrl = resolveUrl$1.exports;
+       var store = store_legacy;
+       var xtend = immutable; // # osm-auth
+       //
+       // This code is only compatible with IE10+ because the [XDomainRequest](http://bit.ly/LfO7xo)
+       // object, IE<10's idea of [CORS](http://en.wikipedia.org/wiki/Cross-origin_resource_sharing),
+       // does not support custom headers, which this uses everywhere.

 
 

-       UnionOp.prototype.interfaces_ = function interfaces_ () {
-         return []
-       };
-       UnionOp.prototype.getClass = function getClass () {
-         return UnionOp
-       };
-       UnionOp.union = function union (g, other) {
-         if (g.isEmpty() || other.isEmpty()) {
-           if (g.isEmpty() && other.isEmpty()) { return OverlayOp.createEmptyResult(OverlayOp.UNION, g, other, g.getFactory()) }
-           if (g.isEmpty()) { return other.copy() }
-           if (other.isEmpty()) { return g.copy() }
-         }
-         g.checkNotGeometryCollection(g);
-         g.checkNotGeometryCollection(other);
-         return SnapIfNeededOverlayOp.overlayOp(g, other, OverlayOp.UNION)
-       };
+       var osmAuth = function osmAuth(o) {
+         var oauth = {}; // authenticated users will also have a request token secret, but it's
+         // not used in transactions with the server

 
 

-       /**
-        * Earth Radius used with the Harvesine formula and approximates using a spherical (non-ellipsoid) Earth.
-        */
+         oauth.authenticated = function () {
+           return !!(token('oauth_token') && token('oauth_token_secret'));
+         };

 
 

-       /**
-        * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
-        *
-        * @name feature
-        * @param {Geometry} geometry input geometry
-        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-        * @param {Object} [options={}] Optional Parameters
-        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-        * @param {string|number} [options.id] Identifier associated with the Feature
-        * @returns {Feature} a GeoJSON Feature
-        * @example
-        * var geometry = {
-        *   "type": "Point",
-        *   "coordinates": [110, 50]
-        * };
-        *
-        * var feature = turf.feature(geometry);
-        *
-        * //=feature
-        */
-       function feature$1(geometry, properties, options) {
-           // Optional Parameters
-           options = options || {};
-           if (!isObject$4(options)) { throw new Error('options is invalid'); }
-           var bbox = options.bbox;
-           var id = options.id;
+         oauth.logout = function () {
+           token('oauth_token', '');
+           token('oauth_token_secret', '');
+           token('oauth_request_token_secret', '');
+           return oauth;
+         }; // TODO: detect lack of click event
+
+
+         oauth.authenticate = function (callback) {
+           if (oauth.authenticated()) return callback();
+           oauth.logout(); // ## Getting a request token
+
+           var params = timenonce(getAuth(o)),
+               url = o.url + '/oauth/request_token';
+           params.oauth_signature = ohauth.signature(o.oauth_secret, '', ohauth.baseString('POST', url, params));
+
+           if (!o.singlepage) {
+             // Create a 600x550 popup window in the center of the screen
+             var w = 600,
+                 h = 550,
+                 settings = [['width', w], ['height', h], ['left', screen.width / 2 - w / 2], ['top', screen.height / 2 - h / 2]].map(function (x) {
+               return x.join('=');
+             }).join(','),
+                 popup = window.open('about:blank', 'oauth_window', settings);
+             oauth.popupWindow = popup;
+
+             if (!popup) {
+               var error = new Error('Popup was blocked');
+               error.status = 'popup-blocked';
+               throw error;
+             }
+           } // Request a request token. When this is complete, the popup
+           // window is redirected to OSM's authorization page.

 
 

-           // Validation
-           if (geometry === undefined) { throw new Error('geometry is required'); }
-           if (properties && properties.constructor !== Object) { throw new Error('properties must be an Object'); }
-           if (bbox) { validateBBox(bbox); }
-           if (id) { validateId(id); }

 
 

-           // Main
-           var feat = {type: 'Feature'};
-           if (id) { feat.id = id; }
-           if (bbox) { feat.bbox = bbox; }
-           feat.properties = properties || {};
-           feat.geometry = geometry;
-           return feat;
-       }
+           ohauth.xhr('POST', url, params, null, {}, reqTokenDone);
+           o.loading();

 
 

-       /**
-        * isNumber
-        *
-        * @param {*} num Number to validate
-        * @returns {boolean} true/false
-        * @example
-        * turf.isNumber(123)
-        * //=true
-        * turf.isNumber('foo')
-        * //=false
-        */
-       function isNumber$1(num) {
-           return !isNaN(num) && num !== null && !Array.isArray(num);
-       }
+           function reqTokenDone(err, xhr) {
+             o.done();
+             if (err) return callback(err);
+             var resp = ohauth.stringQs(xhr.response);
+             token('oauth_request_token_secret', resp.oauth_token_secret);
+             var authorize_url = o.url + '/oauth/authorize?' + ohauth.qsString({
+               oauth_token: resp.oauth_token,
+               oauth_callback: resolveUrl(o.landing)
+             });

 
 

-       /**
-        * isObject
-        *
-        * @param {*} input variable to validate
-        * @returns {boolean} true/false
-        * @example
-        * turf.isObject({elevation: 10})
-        * //=true
-        * turf.isObject('foo')
-        * //=false
-        */
-       function isObject$4(input) {
-           return (!!input) && (input.constructor === Object);
-       }
+             if (o.singlepage) {
+               location.href = authorize_url;
+             } else {
+               popup.location = authorize_url;
+             }
+           } // Called by a function in a landing page, in the popup window. The
+           // window closes itself.

 
 

-       /**
-        * Validate BBox
-        *
-        * @private
-        * @param {Array<number>} bbox BBox to validate
-        * @returns {void}
-        * @throws Error if BBox is not valid
-        * @example
-        * validateBBox([-180, -40, 110, 50])
-        * //=OK
-        * validateBBox([-180, -40])
-        * //=Error
-        * validateBBox('Foo')
-        * //=Error
-        * validateBBox(5)
-        * //=Error
-        * validateBBox(null)
-        * //=Error
-        * validateBBox(undefined)
-        * //=Error
-        */
-       function validateBBox(bbox) {
-           if (!bbox) { throw new Error('bbox is required'); }
-           if (!Array.isArray(bbox)) { throw new Error('bbox must be an Array'); }
-           if (bbox.length !== 4 && bbox.length !== 6) { throw new Error('bbox must be an Array of 4 or 6 numbers'); }
-           bbox.forEach(function (num) {
-               if (!isNumber$1(num)) { throw new Error('bbox must only contain numbers'); }
-           });
-       }

 
 

-       /**
-        * Validate Id
-        *
-        * @private
-        * @param {string|number} id Id to validate
-        * @returns {void}
-        * @throws Error if Id is not valid
-        * @example
-        * validateId([-180, -40, 110, 50])
-        * //=Error
-        * validateId([-180, -40])
-        * //=Error
-        * validateId('Foo')
-        * //=OK
-        * validateId(5)
-        * //=OK
-        * validateId(null)
-        * //=Error
-        * validateId(undefined)
-        * //=Error
-        */
-       function validateId(id) {
-           if (!id) { throw new Error('id is required'); }
-           if (['string', 'number'].indexOf(typeof id) === -1) { throw new Error('id must be a number or a string'); }
-       }
+           window.authComplete = function (token) {
+             var oauth_token = ohauth.stringQs(token.split('?')[1]);
+             get_access_token(oauth_token.oauth_token);
+             delete window.authComplete;
+           }; // ## Getting an request token
+           //
+           // At this point we have an `oauth_token`, brought in from a function
+           // call on a landing page popup.

 
 

-       /**
-        * Callback for geomEach
-        *
-        * @callback geomEachCallback
-        * @param {Geometry} currentGeometry The current Geometry being processed.
-        * @param {number} featureIndex The current index of the Feature being processed.
-        * @param {Object} featureProperties The current Feature Properties being processed.
-        * @param {Array<number>} featureBBox The current Feature BBox being processed.
-        * @param {number|string} featureId The current Feature Id being processed.
-        */

 
 

-       /**
-        * Iterate over each geometry in any GeoJSON object, similar to Array.forEach()
-        *
-        * @name geomEach
-        * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object
-        * @param {Function} callback a method that takes (currentGeometry, featureIndex, featureProperties, featureBBox, featureId)
-        * @returns {void}
-        * @example
-        * var features = turf.featureCollection([
-        *     turf.point([26, 37], {foo: 'bar'}),
-        *     turf.point([36, 53], {hello: 'world'})
-        * ]);
-        *
-        * turf.geomEach(features, function (currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
-        *   //=currentGeometry
-        *   //=featureIndex
-        *   //=featureProperties
-        *   //=featureBBox
-        *   //=featureId
-        * });
-        */
-       function geomEach(geojson, callback) {
-           var i, j, g, geometry, stopG,
-               geometryMaybeCollection,
-               isGeometryCollection,
-               featureProperties,
-               featureBBox,
-               featureId,
-               featureIndex = 0,
-               isFeatureCollection = geojson.type === 'FeatureCollection',
-               isFeature = geojson.type === 'Feature',
-               stop = isFeatureCollection ? geojson.features.length : 1;
-
-           // This logic may look a little weird. The reason why it is that way
-           // is because it's trying to be fast. GeoJSON supports multiple kinds
-           // of objects at its root: FeatureCollection, Features, Geometries.
-           // This function has the responsibility of handling all of them, and that
-           // means that some of the `for` loops you see below actually just don't apply
-           // to certain inputs. For instance, if you give this just a
-           // Point geometry, then both loops are short-circuited and all we do
-           // is gradually rename the input until it's called 'geometry'.
-           //
-           // This also aims to allocate as few resources as possible: just a
-           // few numbers and booleans, rather than any temporary arrays as would
-           // be required with the normalization approach.
-           for (i = 0; i < stop; i++) {
-
-               geometryMaybeCollection = (isFeatureCollection ? geojson.features[i].geometry :
-                   (isFeature ? geojson.geometry : geojson));
-               featureProperties = (isFeatureCollection ? geojson.features[i].properties :
-                   (isFeature ? geojson.properties : {}));
-               featureBBox = (isFeatureCollection ? geojson.features[i].bbox :
-                   (isFeature ? geojson.bbox : undefined));
-               featureId = (isFeatureCollection ? geojson.features[i].id :
-                   (isFeature ? geojson.id : undefined));
-               isGeometryCollection = (geometryMaybeCollection) ? geometryMaybeCollection.type === 'GeometryCollection' : false;
-               stopG = isGeometryCollection ? geometryMaybeCollection.geometries.length : 1;
-
-               for (g = 0; g < stopG; g++) {
-                   geometry = isGeometryCollection ?
-                       geometryMaybeCollection.geometries[g] : geometryMaybeCollection;
-
-                   // Handle null Geometry
-                   if (geometry === null) {
-                       if (callback(null, featureIndex, featureProperties, featureBBox, featureId) === false) { return false; }
-                       continue;
-                   }
-                   switch (geometry.type) {
-                   case 'Point':
-                   case 'LineString':
-                   case 'MultiPoint':
-                   case 'Polygon':
-                   case 'MultiLineString':
-                   case 'MultiPolygon': {
-                       if (callback(geometry, featureIndex, featureProperties, featureBBox, featureId) === false) { return false; }
-                       break;
-                   }
-                   case 'GeometryCollection': {
-                       for (j = 0; j < geometry.geometries.length; j++) {
-                           if (callback(geometry.geometries[j], featureIndex, featureProperties, featureBBox, featureId) === false) { return false; }
-                       }
-                       break;
-                   }
-                   default:
-                       throw new Error('Unknown Geometry Type');
-                   }
-               }
-               // Only increase `featureIndex` per each feature
-               featureIndex++;
+           function get_access_token(oauth_token) {
+             var url = o.url + '/oauth/access_token',
+                 params = timenonce(getAuth(o)),
+                 request_token_secret = token('oauth_request_token_secret');
+             params.oauth_token = oauth_token;
+             params.oauth_signature = ohauth.signature(o.oauth_secret, request_token_secret, ohauth.baseString('POST', url, params)); // ## Getting an access token
+             //
+             // The final token required for authentication. At this point
+             // we have a `request token secret`
+
+             ohauth.xhr('POST', url, params, null, {}, accessTokenDone);
+             o.loading();

            }
            }

-       }

 
 

-       /**
-        * Callback for geomReduce
-        *
-        * The first time the callback function is called, the values provided as arguments depend
-        * on whether the reduce method has an initialValue argument.
-        *
-        * If an initialValue is provided to the reduce method:
-        *  - The previousValue argument is initialValue.
-        *  - The currentValue argument is the value of the first element present in the array.
-        *
-        * If an initialValue is not provided:
-        *  - The previousValue argument is the value of the first element present in the array.
-        *  - The currentValue argument is the value of the second element present in the array.
-        *
-        * @callback geomReduceCallback
-        * @param {*} previousValue The accumulated value previously returned in the last invocation
-        * of the callback, or initialValue, if supplied.
-        * @param {Geometry} currentGeometry The current Geometry being processed.
-        * @param {number} featureIndex The current index of the Feature being processed.
-        * @param {Object} featureProperties The current Feature Properties being processed.
-        * @param {Array<number>} featureBBox The current Feature BBox being processed.
-        * @param {number|string} featureId The current Feature Id being processed.
-        */
+           function accessTokenDone(err, xhr) {
+             o.done();
+             if (err) return callback(err);
+             var access_token = ohauth.stringQs(xhr.response);
+             token('oauth_token', access_token.oauth_token);
+             token('oauth_token_secret', access_token.oauth_token_secret);
+             callback(null, oauth);
+           }
+         };

 
 

-       /**
-        * Reduce geometry in any GeoJSON object, similar to Array.reduce().
-        *
-        * @name geomReduce
-        * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object
-        * @param {Function} callback a method that takes (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId)
-        * @param {*} [initialValue] Value to use as the first argument to the first call of the callback.
-        * @returns {*} The value that results from the reduction.
-        * @example
-        * var features = turf.featureCollection([
-        *     turf.point([26, 37], {foo: 'bar'}),
-        *     turf.point([36, 53], {hello: 'world'})
-        * ]);
-        *
-        * turf.geomReduce(features, function (previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
-        *   //=previousValue
-        *   //=currentGeometry
-        *   //=featureIndex
-        *   //=featureProperties
-        *   //=featureBBox
-        *   //=featureId
-        *   return currentGeometry
-        * });
-        */
-       function geomReduce(geojson, callback, initialValue) {
-           var previousValue = initialValue;
-           geomEach(geojson, function (currentGeometry, featureIndex, featureProperties, featureBBox, featureId) {
-               if (featureIndex === 0 && initialValue === undefined) { previousValue = currentGeometry; }
-               else { previousValue = callback(previousValue, currentGeometry, featureIndex, featureProperties, featureBBox, featureId); }
-           });
-           return previousValue;
-       }
+         oauth.bringPopupWindowToFront = function () {
+           var brougtPopupToFront = false;

 
 

-       /**
-        * Callback for flattenEach
-        *
-        * @callback flattenEachCallback
-        * @param {Feature} currentFeature The current flattened feature being processed.
-        * @param {number} featureIndex The current index of the Feature being processed.
-        * @param {number} multiFeatureIndex The current index of the Multi-Feature being processed.
-        */
+           try {
+             // This may cause a cross-origin error:
+             // `DOMException: Blocked a frame with origin "..." from accessing a cross-origin frame.`
+             if (oauth.popupWindow && !oauth.popupWindow.closed) {
+               oauth.popupWindow.focus();
+               brougtPopupToFront = true;
+             }
+           } catch (err) {// Bringing popup window to front failed (probably because of the cross-origin error mentioned above)
+           }

 
 

-       /**
-        * Iterate over flattened features in any GeoJSON object, similar to
-        * Array.forEach.
-        *
-        * @name flattenEach
-        * @param {FeatureCollection|Feature|Geometry} geojson any GeoJSON object
-        * @param {Function} callback a method that takes (currentFeature, featureIndex, multiFeatureIndex)
-        * @example
-        * var features = turf.featureCollection([
-        *     turf.point([26, 37], {foo: 'bar'}),
-        *     turf.multiPoint([[40, 30], [36, 53]], {hello: 'world'})
-        * ]);
-        *
-        * turf.flattenEach(features, function (currentFeature, featureIndex, multiFeatureIndex) {
-        *   //=currentFeature
-        *   //=featureIndex
-        *   //=multiFeatureIndex
-        * });
-        */
-       function flattenEach(geojson, callback) {
-           geomEach(geojson, function (geometry, featureIndex, properties, bbox, id) {
-               // Callback for single geometry
-               var type = (geometry === null) ? null : geometry.type;
-               switch (type) {
-               case null:
-               case 'Point':
-               case 'LineString':
-               case 'Polygon':
-                   if (callback(feature$1(geometry, properties, {bbox: bbox, id: id}), featureIndex, 0) === false) { return false; }
-                   return;
-               }
+           return brougtPopupToFront;
+         };

 
 

-               var geomType;
+         oauth.bootstrapToken = function (oauth_token, callback) {
+           // ## Getting an request token
+           // At this point we have an `oauth_token`, brought in from a function
+           // call on a landing page popup.
+           function get_access_token(oauth_token) {
+             var url = o.url + '/oauth/access_token',
+                 params = timenonce(getAuth(o)),
+                 request_token_secret = token('oauth_request_token_secret');
+             params.oauth_token = oauth_token;
+             params.oauth_signature = ohauth.signature(o.oauth_secret, request_token_secret, ohauth.baseString('POST', url, params)); // ## Getting an access token
+             // The final token required for authentication. At this point
+             // we have a `request token secret`

 
 

-               // Callback for multi-geometry
-               switch (type) {
-               case 'MultiPoint':
-                   geomType = 'Point';
-                   break;
-               case 'MultiLineString':
-                   geomType = 'LineString';
-                   break;
-               case 'MultiPolygon':
-                   geomType = 'Polygon';
-                   break;
-               }
+             ohauth.xhr('POST', url, params, null, {}, accessTokenDone);
+             o.loading();
+           }

 
 

-               for (var multiFeatureIndex = 0; multiFeatureIndex < geometry.coordinates.length; multiFeatureIndex++) {
-                   var coordinate = geometry.coordinates[multiFeatureIndex];
-                   var geom = {
-                       type: geomType,
-                       coordinates: coordinate
-                   };
-                   if (callback(feature$1(geom, properties), featureIndex, multiFeatureIndex) === false) { return false; }
-               }
-           });
-       }
+           function accessTokenDone(err, xhr) {
+             o.done();
+             if (err) return callback(err);
+             var access_token = ohauth.stringQs(xhr.response);
+             token('oauth_token', access_token.oauth_token);
+             token('oauth_token_secret', access_token.oauth_token_secret);
+             callback(null, oauth);
+           }

 
 

-       /**
-        * Takes one or more features and returns their area in square meters.
-        *
-        * @name area
-        * @param {GeoJSON} geojson input GeoJSON feature(s)
-        * @returns {number} area in square meters
-        * @example
-        * var polygon = turf.polygon([[[125, -15], [113, -22], [154, -27], [144, -15], [125, -15]]]);
-        *
-        * var area = turf.area(polygon);
-        *
-        * //addToMap
-        * var addToMap = [polygon]
-        * polygon.properties.area = area
-        */
-       function area(geojson) {
-           return geomReduce(geojson, function (value, geom) {
-               return value + calculateArea(geom);
-           }, 0);
-       }
+           get_access_token(oauth_token);
+         }; // # xhr
+         //
+         // A single XMLHttpRequest wrapper that does authenticated calls if the
+         // user has logged in.

 
 

-       var RADIUS$1 = 6378137;
-       // var FLATTENING_DENOM = 298.257223563;
-       // var FLATTENING = 1 / FLATTENING_DENOM;
-       // var POLAR_RADIUS = RADIUS * (1 - FLATTENING);

 
 

-       /**
-        * Calculate Area
-        *
-        * @private
-        * @param {GeoJSON} geojson GeoJSON
-        * @returns {number} area
-        */
-       function calculateArea(geojson) {
-           var area = 0, i;
-           switch (geojson.type) {
-           case 'Polygon':
-               return polygonArea$1(geojson.coordinates);
-           case 'MultiPolygon':
-               for (i = 0; i < geojson.coordinates.length; i++) {
-                   area += polygonArea$1(geojson.coordinates[i]);
-               }
-               return area;
-           case 'Point':
-           case 'MultiPoint':
-           case 'LineString':
-           case 'MultiLineString':
-               return 0;
-           case 'GeometryCollection':
-               for (i = 0; i < geojson.geometries.length; i++) {
-                   area += calculateArea(geojson.geometries[i]);
-               }
-               return area;
+         oauth.xhr = function (options, callback) {
+           if (!oauth.authenticated()) {
+             if (o.auto) {
+               return oauth.authenticate(run);
+             } else {
+               callback('not authenticated', null);
+               return;
+             }
+           } else {
+             return run();

            }
            }

-       }

 
 

-       function polygonArea$1(coords) {
-           var area = 0;
-           if (coords && coords.length > 0) {
-               area += Math.abs(ringArea$1(coords[0]));
-               for (var i = 1; i < coords.length; i++) {
-                   area -= Math.abs(ringArea$1(coords[i]));
-               }
-           }
-           return area;
-       }
+           function run() {
+             var params = timenonce(getAuth(o)),
+                 oauth_token_secret = token('oauth_token_secret'),
+                 url = options.prefix !== false ? o.url + options.path : options.path,
+                 url_parts = url.replace(/#.*$/, '').split('?', 2),
+                 base_url = url_parts[0],
+                 query = url_parts.length === 2 ? url_parts[1] : ''; // https://tools.ietf.org/html/rfc5849#section-3.4.1.3.1

 
 

-       /**
-        * @private
-        * Calculate the approximate area of the polygon were it projected onto the earth.
-        * Note that this area will be positive if ring is oriented clockwise, otherwise it will be negative.
-        *
-        * Reference:
-        * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
-        * Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
-        *
-        * @param {Array<Array<number>>} coords Ring Coordinates
-        * @returns {number} The approximate signed geodesic area of the polygon in square meters.
-        */
-       function ringArea$1(coords) {
-           var p1;
-           var p2;
-           var p3;
-           var lowerIndex;
-           var middleIndex;
-           var upperIndex;
-           var i;
-           var area = 0;
-           var coordsLength = coords.length;
-
-           if (coordsLength > 2) {
-               for (i = 0; i < coordsLength; i++) {
-                   if (i === coordsLength - 2) { // i = N-2
-                       lowerIndex = coordsLength - 2;
-                       middleIndex = coordsLength - 1;
-                       upperIndex = 0;
-                   } else if (i === coordsLength - 1) { // i = N-1
-                       lowerIndex = coordsLength - 1;
-                       middleIndex = 0;
-                       upperIndex = 1;
-                   } else { // i = 0 to N-3
-                       lowerIndex = i;
-                       middleIndex = i + 1;
-                       upperIndex = i + 2;
-                   }
-                   p1 = coords[lowerIndex];
-                   p2 = coords[middleIndex];
-                   p3 = coords[upperIndex];
-                   area += (rad$1(p3[0]) - rad$1(p1[0])) * Math.sin(rad$1(p2[1]));
-               }
+             if ((!options.options || !options.options.header || options.options.header['Content-Type'] === 'application/x-www-form-urlencoded') && options.content) {
+               params = xtend(params, ohauth.stringQs(options.content));
+             }

 
 

-               area = area * RADIUS$1 * RADIUS$1 / 2;
+             params.oauth_token = token('oauth_token');
+             params.oauth_signature = ohauth.signature(o.oauth_secret, oauth_token_secret, ohauth.baseString(options.method, base_url, xtend(params, ohauth.stringQs(query))));
+             return ohauth.xhr(options.method, url, params, options.content, options.options, done);

            }
 
            }
 

-           return area;
-       }
+           function done(err, xhr) {
+             if (err) return callback(err);else if (xhr.responseXML) return callback(err, xhr.responseXML);else return callback(err, xhr.response);
+           }
+         }; // pre-authorize this object, if we can just get a token and token_secret
+         // from the start

 
 

-       function rad$1(_) {
-           return _ * Math.PI / 180;
-       }

 
 

-       /**
-        * Get Geometry from Feature or Geometry Object
-        *
-        * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
-        * @returns {Geometry|null} GeoJSON Geometry Object
-        * @throws {Error} if geojson is not a Feature or Geometry Object
-        * @example
-        * var point = {
-        *   "type": "Feature",
-        *   "properties": {},
-        *   "geometry": {
-        *     "type": "Point",
-        *     "coordinates": [110, 40]
-        *   }
-        * }
-        * var geom = turf.getGeom(point)
-        * //={"type": "Point", "coordinates": [110, 40]}
-        */
-       function getGeom(geojson) {
-           if (!geojson) { throw new Error('geojson is required'); }
-           if (geojson.geometry !== undefined) { return geojson.geometry; }
-           if (geojson.coordinates || geojson.geometries) { return geojson; }
-           throw new Error('geojson must be a valid Feature or Geometry Object');
-       }
+         oauth.preauth = function (c) {
+           if (!c) return;
+           if (c.oauth_token) token('oauth_token', c.oauth_token);
+           if (c.oauth_token_secret) token('oauth_token_secret', c.oauth_token_secret);
+           return oauth;
+         };

 
 

-       /**
-        * Finds the difference between two {@link Polygon|polygons} by clipping the second polygon from the first.
-        *
-        * @name difference
-        * @param {Feature<Polygon|MultiPolygon>} polygon1 input Polygon feature
-        * @param {Feature<Polygon|MultiPolygon>} polygon2 Polygon feature to difference from polygon1
-        * @returns {Feature<Polygon|MultiPolygon>|null} a Polygon or MultiPolygon feature showing the area of `polygon1` excluding the area of `polygon2` (if empty returns `null`)
-        * @example
-        * var polygon1 = turf.polygon([[
-        *   [128, -26],
-        *   [141, -26],
-        *   [141, -21],
-        *   [128, -21],
-        *   [128, -26]
-        * ]], {
-        *   "fill": "#F00",
-        *   "fill-opacity": 0.1
-        * });
-        * var polygon2 = turf.polygon([[
-        *   [126, -28],
-        *   [140, -28],
-        *   [140, -20],
-        *   [126, -20],
-        *   [126, -28]
-        * ]], {
-        *   "fill": "#00F",
-        *   "fill-opacity": 0.1
-        * });
-        *
-        * var difference = turf.difference(polygon1, polygon2);
-        *
-        * //addToMap
-        * var addToMap = [polygon1, polygon2, difference];
-        */
-       function difference(polygon1, polygon2) {
-           var geom1 = getGeom(polygon1);
-           var geom2 = getGeom(polygon2);
-           var properties = polygon1.properties || {};
+         oauth.options = function (_) {
+           if (!arguments.length) return o;
+           o = _;
+           o.url = o.url || 'https://www.openstreetmap.org';
+           o.landing = o.landing || 'land.html';
+           o.singlepage = o.singlepage || false; // Optional loading and loading-done functions for nice UI feedback.
+           // by default, no-ops

 
 

-           // Issue #721 - JSTS can't handle empty polygons
-           geom1 = removeEmptyPolygon(geom1);
-           geom2 = removeEmptyPolygon(geom2);
-           if (!geom1) { return null; }
-           if (!geom2) { return feature$1(geom1, properties); }
+           o.loading = o.loading || function () {};

 
 

-           // JSTS difference operation
-           var reader = new GeoJSONReader();
-           var a = reader.read(geom1);
-           var b = reader.read(geom2);
-           var differenced = OverlayOp.difference(a, b);
-           if (differenced.isEmpty()) { return null; }
-           var writer = new GeoJSONWriter();
-           var geom = writer.write(differenced);
+           o.done = o.done || function () {};

 
 

-           return feature$1(geom, properties);
-       }
+           return oauth.preauth(o);
+         }; // 'stamp' an authentication object from `getAuth()`
+         // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
+         // and timestamp

 
 

-       /**
-        * Detect Empty Polygon
-        *
-        * @private
-        * @param {Geometry<Polygon|MultiPolygon>} geom Geometry Object
-        * @returns {Geometry<Polygon|MultiPolygon>|null} removed any polygons with no areas
-        */
-       function removeEmptyPolygon(geom) {
-           switch (geom.type) {
-           case 'Polygon':
-               if (area(geom) > 1) { return geom; }
-               return null;
-           case 'MultiPolygon':
-               var coordinates = [];
-               flattenEach(geom, function (feature$$1) {
-                   if (area(feature$$1) > 1) { coordinates.push(feature$$1.geometry.coordinates); }
-               });
-               if (coordinates.length) { return {type: 'MultiPolygon', coordinates: coordinates}; }
-           }
-       }

 
 

-       /**
-        * Takes two or more {@link Polygon|polygons} and returns a combined polygon. If the input polygons are not contiguous, this function returns a {@link MultiPolygon} feature.
-        *
-        * @name union
-        * @param {...Feature<Polygon>} A polygon to combine
-        * @returns {Feature<(Polygon|MultiPolygon)>} a combined {@link Polygon} or {@link MultiPolygon} feature
-        * @example
-        * var poly1 = turf.polygon([[
-        *     [-82.574787, 35.594087],
-        *     [-82.574787, 35.615581],
-        *     [-82.545261, 35.615581],
-        *     [-82.545261, 35.594087],
-        *     [-82.574787, 35.594087]
-        * ]], {"fill": "#0f0"});
-        * var poly2 = turf.polygon([[
-        *     [-82.560024, 35.585153],
-        *     [-82.560024, 35.602602],
-        *     [-82.52964, 35.602602],
-        *     [-82.52964, 35.585153],
-        *     [-82.560024, 35.585153]
-        * ]], {"fill": "#00f"});
-        *
-        * var union = turf.union(poly1, poly2);
-        *
-        * //addToMap
-        * var addToMap = [poly1, poly2, union];
-        */
-       function union$1() {
-           var arguments$1 = arguments;
+         function timenonce(o) {
+           o.oauth_timestamp = ohauth.timestamp();
+           o.oauth_nonce = ohauth.nonce();
+           return o;
+         } // get/set tokens. These are prefixed with the base URL so that `osm-auth`
+         // can be used with multiple APIs and the keys in `localStorage`
+         // will not clash

 
 

-           var reader = new GeoJSONReader();
-           var result = reader.read(JSON.stringify(arguments[0].geometry));

 
 

-           for (var i = 1; i < arguments.length; i++) {
-               result = UnionOp.union(result, reader.read(JSON.stringify(arguments$1[i].geometry)));
-           }
+         var token;

 
 

-           var writer = new GeoJSONWriter();
-           result = writer.write(result);
+         if (store.enabled) {
+           token = function token(x, y) {
+             if (arguments.length === 1) return store.get(o.url + x);else if (arguments.length === 2) return store.set(o.url + x, y);
+           };
+         } else {
+           var storage = {};

 
 

-           return {
-               type: 'Feature',
-               geometry: result,
-               properties: arguments[0].properties
+           token = function token(x, y) {
+             if (arguments.length === 1) return storage[o.url + x];else if (arguments.length === 2) return storage[o.url + x] = y;

            };
            };

-       }
+         } // Get an authentication object. If you just add and remove properties
+         // from a single object, you'll need to use `delete` to make sure that
+         // it doesn't contain undesired properties for authentication

 
 

-       // Reduce an array of locations into a single GeoJSON feature
-       function _locationReducer(accumulator, location) {
-         /* eslint-disable no-console, no-invalid-this */
-         var result;
-         try {
-           var resolved = this.resolveLocation(location);
-           if (!resolved || !resolved.feature) {
-             console.warn(("Warning:  Couldn't resolve location \"" + location + "\""));
-             return accumulator;
-           }
-           result = !accumulator ? resolved.feature : union$1(accumulator, resolved.feature);
-         } catch (e) {
-           console.warn(("Warning:  Error resolving location \"" + location + "\""));
-           console.warn(e);
-           result = accumulator;
-         }

 
 

-         return result;
-         /* eslint-enable no-console, no-invalid-this */
-       }
+         function getAuth(o) {
+           return {
+             oauth_consumer_key: o.oauth_consumer_key,
+             oauth_signature_method: 'HMAC-SHA1'
+           };
+         } // potentially pre-authorize

 
 
 
 

+         oauth.options(o);
+         return oauth;
+       };

 
 

-       function _cloneDeep(obj) {
-         return JSON.parse(JSON.stringify(obj));
-       }
+       var tiler$2 = utilTiler();
+       var dispatch$2 = dispatch$8('apiStatusChange', 'authLoading', 'authDone', 'change', 'loading', 'loaded', 'loadedNotes');
+       var urlroot = 'https://www.openstreetmap.org';
+       var oauth = osmAuth({
+         url: urlroot,
+         oauth_consumer_key: '5A043yRSEugj4DJ5TljuapfnrflWDte8jTOcWLlT',
+         oauth_secret: 'aB3jKq1TRsCOUrfOIZ6oQMEDmv2ptV76PA54NGLL',
+         loading: authLoading,
+         done: authDone
+       }); // hardcode default block of Google Maps
+
+       var _imageryBlocklists = [/.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/];
+       var _tileCache = {
+         toLoad: {},
+         loaded: {},
+         inflight: {},
+         seen: {},
+         rtree: new RBush()
+       };
+       var _noteCache = {
+         toLoad: {},
+         loaded: {},
+         inflight: {},
+         inflightPost: {},
+         note: {},
+         closed: {},
+         rtree: new RBush()
+       };
+       var _userCache = {
+         toLoad: {},
+         user: {}
+       };

 
 

+       var _cachedApiStatus;

 
 

-       var defaultExport = function defaultExport(fc) {
-         var this$1 = this;
+       var _changeset = {};

 
 

-         this._cache = {};
+       var _deferred = new Set();

 
 

-         // process input FeatureCollection
-         if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
-           fc.features.forEach(function (feature) {
-             feature.properties = feature.properties || {};
-             var props = feature.properties;
+       var _connectionID = 1;
+       var _tileZoom = 16;
+       var _noteZoom = 12;

 
 

-             // get `id` from either `id` or `properties`
-             var id = feature.id || props.id;
-             if (!id || !/^\S+\.geojson$/i.test(id)) { return; }
+       var _rateLimitError;

 
 

-             // ensure id exists and is lowercase
-             id = id.toLowerCase();
-             feature.id = id;
-             props.id = id;
+       var _userChangesets;

 
 

-             // ensure area property exists
-             if (!props.area) {
-               var area = geojsonArea.geometry(feature.geometry) / 1e6;// m² to km²
-               props.area = Number(area.toFixed(2));
-             }
+       var _userDetails;

 
 

-             this$1._cache[id] = feature;
-           });
-         }
+       var _off; // set a default but also load this from the API status

 
 

-         // Replace CountryCoder world geometry to have a polygon covering the world.
-         var world = _cloneDeep(feature('Q2'));
-         world.geometry = {
-           type: 'Polygon',
-           coordinates: [[[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]]]
-         };
-         world.id = 'Q2';
-         world.properties.id = 'Q2';
-         world.properties.area = geojsonArea.geometry(world.geometry) / 1e6;// m² to km²
-         this._cache.Q2 = world;
-       };

 
 

+       var _maxWayNodes = 2000;

 
 

-       // validateLocation
-       //
-       // Pass a `location` identifier
-       // Returns a result like
-       // {
-       //   type:   'point', 'geojson', or 'countrycoder'
-       //   location:the queried location
-       //   id:      a unique identifier
-       // }
-       //or `null` if the location is invalid
-       //
-       defaultExport.prototype.validateLocation = function validateLocation (location) {
-         if (Array.isArray(location)) { // a [lon,lat] coordinate pair?
-           if (location.length === 2 && Number.isFinite(location[0]) && Number.isFinite(location[1]) &&
-             location[0] >= -180 && location[0] <= 180 && location[1] >= -90 && location[1] <= 90
-           ) {
-             var id = '[' + location.toString() + ']';
-             return { type: 'point', location: location, id: id };
-           }
+       function authLoading() {
+         dispatch$2.call('authLoading');
+       }

 
 

-         } else if (typeof location === 'string' && /^\S+\.geojson$/i.test(location)) { // a .geojson filename?
-           var id$1 = location.toLowerCase();
-           if (this._cache[id$1]) {
-             return { type: 'geojson', location: location, id: id$1 };
-           }
+       function authDone() {
+         dispatch$2.call('authDone');
+       }

 
 

-         } else if (typeof location === 'string' || typeof location === 'number') { // a country-coder value?
-           var feature$1 = feature(location);
-           if (feature$1) {
-             // Use wikidata QID as the identifier, since that seems to be the only
-             // property that everything in CountryCoder is guaranteed to have.
-             var id$2 = feature$1.properties.wikidata;
-             return { type: 'countrycoder', location: location, id: id$2 };
-           }
+       function abortRequest$2(controllerOrXHR) {
+         if (controllerOrXHR) {
+           controllerOrXHR.abort();

          }
          }

+       }

 
 

-         return null;
-       };
+       function hasInflightRequests(cache) {
+         return Object.keys(cache.inflight).length;
+       }

 
 

+       function abortUnwantedRequests(cache, visibleTiles) {
+         Object.keys(cache.inflight).forEach(function (k) {
+           if (cache.toLoad[k]) return;
+           if (visibleTiles.find(function (tile) {
+             return k === tile.id;
+           })) return;
+           abortRequest$2(cache.inflight[k]);
+           delete cache.inflight[k];
+         });
+       }

 
 

-       // resolveLocation
-       //
-       // Pass a `location` identifier
-       // Returns a result like
-       // {
-       //   type:    'point', 'geojson', or 'countrycoder'
-       //   location:the queried location
-       //   id:      a unique identifier
-       //   feature: the geojson feature
-       // }
-       //or `null` if the location is invalid
-       //
-       defaultExport.prototype.resolveLocation = function resolveLocation (location) {
-         var valid = this.validateLocation(location);
-         if (!valid) { return null; }
-
-         // return a result from cache if we can
-         if (this._cache[valid.id]) {
-           return Object.assign(valid, { feature: this._cache[valid.id] });
-         }
-
-         // a [lon,lat] coordinate pair?
-         if (valid.type === 'point') {
-           var RADIUS = 25000;// meters
-           var EDGES = 10;
-           var PRECISION = 3;
-           var area = Math.PI * RADIUS * RADIUS / 1e6;   // m² to km²
-           var feature$1 = this._cache[valid.id] = geojsonPrecision({
-             type: 'Feature',
-             id: valid.id,
-             properties: { id: valid.id, area: Number(area.toFixed(2)) },
-             geometry: circleToPolygon(location, RADIUS, EDGES)
-           }, PRECISION);
-           return Object.assign(valid, { feature: feature$1 });
-
-         // a .geojson filename?
-         } else if (valid.type === 'geojson') ; else if (valid.type === 'countrycoder') {
-           var feature$1$1 = _cloneDeep(feature(valid.id));
-           var props = feature$1$1.properties;
-
-           // -> This block of code is weird and requires some explanation. <-
-           // CountryCoder includes higher level features which are made up of members.
-           // These features don't have their own geometry, but CountryCoder provides an
-           // `aggregateFeature` method to combine these members into a MultiPolygon.
-           // BUT, when we try to actually work with these aggregated MultiPolygons,
-           // Turf/JSTS gets crashy because of topography bugs.
-           // SO, we'll aggregate the features ourselves by unioning them together.
-           // This approach also has the benefit of removing all the internal boaders and
-           // simplifying the regional polygons a lot.
-           if (Array.isArray(props.members)) {
-             var seed = feature$1$1.geometry ? feature$1$1 : null;
-             var aggregate = props.members.reduce(_locationReducer.bind(this), seed);
-             feature$1$1.geometry = aggregate.geometry;
-           }
-
-           // ensure area property exists
-           if (!props.area) {
-             var area$1 = geojsonArea.geometry(feature$1$1.geometry) / 1e6;// m² to km²
-             props.area = Number(area$1.toFixed(2));
-           }
-
-           // ensure id property exists
-           feature$1$1.id = valid.id;
-           props.id = valid.id;
-
-           this._cache[valid.id] = feature$1$1;
-           return Object.assign(valid, { feature: feature$1$1 });
-         }
+       function getLoc(attrs) {
+         var lon = attrs.lon && attrs.lon.value;
+         var lat = attrs.lat && attrs.lat.value;
+         return [parseFloat(lon), parseFloat(lat)];
+       }

 
 

-         return null;
-       };
+       function getNodes(obj) {
+         var elems = obj.getElementsByTagName('nd');
+         var nodes = new Array(elems.length);

 
 

+         for (var i = 0, l = elems.length; i < l; i++) {
+           nodes[i] = 'n' + elems[i].attributes.ref.value;
+         }

 
 

-       // resolveLocationSet
-       //
-       // Pass a `locationSet` Object like:
-       // `{ include: [ Array ], exclude: [ Array ] }`
-       // Returns a stable identifier string of the form:
-       // "+[included]-[excluded]"
-       //
-       defaultExport.prototype.resolveLocationSet = function resolveLocationSet (locationSet) {
-         locationSet = locationSet || {};
-         var resolve = this.resolveLocation.bind(this);
-         var include = (locationSet.include || []).map(resolve).filter(Boolean);
-         var exclude = (locationSet.exclude || []).map(resolve).filter(Boolean);
+         return nodes;
+       }

 
 

-         if (!include.length) {
-           include = [resolve('Q2')]; // default to 'the world'
-         }
+       function getNodesJSON(obj) {
+         var elems = obj.nodes;
+         var nodes = new Array(elems.length);

 
 

-         // return quickly if it's a single included location..
-         if (include.length === 1 && exclude.length === 0) {
-           return include[0].feature;
+         for (var i = 0, l = elems.length; i < l; i++) {
+           nodes[i] = 'n' + elems[i];

          }
 
          }
 

-         // generate stable identifier
-         include.sort(sortFeatures);
-         var id = '+[' + include.map(function (d) { return d.id; }).join(',') + ']';
-         if (exclude.length) {
-           exclude.sort(sortFeatures);
-           id += '-[' + exclude.map(function (d) { return d.id; }).join(',') + ']';
-         }
+         return nodes;
+       }
+
+       function getTags(obj) {
+         var elems = obj.getElementsByTagName('tag');
+         var tags = {};

 
 

-         // return cached?
-         if (this._cache[id]) {
-           return this._cache[id];
+         for (var i = 0, l = elems.length; i < l; i++) {
+           var attrs = elems[i].attributes;
+           tags[attrs.k.value] = attrs.v.value;

          }
 
          }
 

-         // calculate unions
-         var includeGeoJSON = include.map(function (d) { return d.location; }).reduce(_locationReducer.bind(this), null);
-         var excludeGeoJSON = exclude.map(function (d) { return d.location; }).reduce(_locationReducer.bind(this), null);
+         return tags;
+       }

 
 

-         // calculate difference, update area and return result
-         var resultGeoJSON = excludeGeoJSON ? difference(includeGeoJSON, excludeGeoJSON) : includeGeoJSON;
-         var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6;// m² to km²
-         resultGeoJSON.id = id;
-         resultGeoJSON.properties = { id: id, area: Number(area.toFixed(2)) };
+       function getMembers(obj) {
+         var elems = obj.getElementsByTagName('member');
+         var members = new Array(elems.length);

 
 

-         return this._cache[id] = resultGeoJSON;
+         for (var i = 0, l = elems.length; i < l; i++) {
+           var attrs = elems[i].attributes;
+           members[i] = {
+             id: attrs.type.value[0] + attrs.ref.value,
+             type: attrs.type.value,
+             role: attrs.role.value
+           };
+         }

 
 

+         return members;
+       }

 
 

-         // Sorting the location lists is ok because they end up unioned together.
-         // This sorting makes it possible to generate a deterministic id.
-         function sortFeatures(a, b) {
-           var rank = { countrycoder: 1, geojson: 2, point: 3 };
-           var aRank = rank[a.type];
-           var bRank = rank[b.type];
+       function getMembersJSON(obj) {
+         var elems = obj.members;
+         var members = new Array(elems.length);

 
 

-           return (aRank > bRank) ? 1
-             : (aRank < bRank) ? -1
-             : a.id.localeCompare(b.id);
+         for (var i = 0, l = elems.length; i < l; i++) {
+           var attrs = elems[i];
+           members[i] = {
+             id: attrs.type[0] + attrs.ref,
+             type: attrs.type,
+             role: attrs.role
+           };

          }
          }

-       };

 
 

+         return members;
+       }

 
 

-       defaultExport.prototype.cache = function cache () {
-         return this._cache;
-       };
+       function getVisible(attrs) {
+         return !attrs.visible || attrs.visible.value !== 'false';
+       }

 
 

-       var _oci = null;
+       function parseComments(comments) {
+         var parsedComments = []; // for each comment

 
 

-       function uiSuccess(context) {
-         var MAXEVENTS = 2;
-         var dispatch$1 = dispatch('cancel');
-         var _changeset;
-         var _location;
-         ensureOSMCommunityIndex();   // start fetching the data
+         for (var i = 0; i < comments.length; i++) {
+           var comment = comments[i];

 
 

+           if (comment.nodeName === 'comment') {
+             var childNodes = comment.childNodes;
+             var parsedComment = {};

 
 

-         function ensureOSMCommunityIndex() {
-           var data = _mainFileFetcher;
-           return Promise.all([ data.get('oci_resources'), data.get('oci_features') ])
-             .then(function (vals) {
-               if (_oci) { return _oci; }
-
-               var ociResources = vals[0].resources;
-               var loco = new defaultExport(vals[1]);
-               var ociFeatures = {};
-
-               Object.values(ociResources).forEach(function (resource) {
-                 var feature = loco.resolveLocationSet(resource.locationSet);
-                 var ociFeature = ociFeatures[feature.id];
-                 if (!ociFeature) {
-                   ociFeature = JSON.parse(JSON.stringify(feature));  // deep clone
-                   ociFeature.properties.resourceIDs = new Set();
-                   ociFeatures[feature.id] = ociFeature;
+             for (var j = 0; j < childNodes.length; j++) {
+               var node = childNodes[j];
+               var nodeName = node.nodeName;
+               if (nodeName === '#text') continue;
+               parsedComment[nodeName] = node.textContent;
+
+               if (nodeName === 'uid') {
+                 var uid = node.textContent;
+
+                 if (uid && !_userCache.user[uid]) {
+                   _userCache.toLoad[uid] = true;

                  }
                  }

-                 ociFeature.properties.resourceIDs.add(resource.id);
-               });
+               }
+             }

 
 

-               return _oci = {
-                 features: ociFeatures,
-                 resources: ociResources,
-                 query: whichPolygon_1({ type: 'FeatureCollection', features: Object.values(ociFeatures) })
-               };
-             });
+             if (parsedComment) {
+               parsedComments.push(parsedComment);
+             }
+           }

          }
 
          }
 

+         return parsedComments;
+       }

 
 

-         // string-to-date parsing in JavaScript is weird
-         function parseEventDate(when) {
-           if (!when) { return; }
-
-           var raw = when.trim();
-           if (!raw) { return; }
+       function encodeNoteRtree(note) {
+         return {
+           minX: note.loc[0],
+           minY: note.loc[1],
+           maxX: note.loc[0],
+           maxY: note.loc[1],
+           data: note
+         };
+       }

 
 

-           if (!/Z$/.test(raw)) {   // if no trailing 'Z', add one
-             raw += 'Z';            // this forces date to be parsed as a UTC date
-           }
+       var jsonparsers = {
+         node: function nodeData(obj, uid) {
+           return new osmNode({
+             id: uid,
+             visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+             version: obj.version && obj.version.toString(),
+             changeset: obj.changeset && obj.changeset.toString(),
+             timestamp: obj.timestamp,
+             user: obj.user,
+             uid: obj.uid && obj.uid.toString(),
+             loc: [parseFloat(obj.lon), parseFloat(obj.lat)],
+             tags: obj.tags
+           });
+         },
+         way: function wayData(obj, uid) {
+           return new osmWay({
+             id: uid,
+             visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+             version: obj.version && obj.version.toString(),
+             changeset: obj.changeset && obj.changeset.toString(),
+             timestamp: obj.timestamp,
+             user: obj.user,
+             uid: obj.uid && obj.uid.toString(),
+             tags: obj.tags,
+             nodes: getNodesJSON(obj)
+           });
+         },
+         relation: function relationData(obj, uid) {
+           return new osmRelation({
+             id: uid,
+             visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+             version: obj.version && obj.version.toString(),
+             changeset: obj.changeset && obj.changeset.toString(),
+             timestamp: obj.timestamp,
+             user: obj.user,
+             uid: obj.uid && obj.uid.toString(),
+             tags: obj.tags,
+             members: getMembersJSON(obj)
+           });
+         },
+         user: function parseUser(obj, uid) {
+           return {
+             id: uid,
+             display_name: obj.display_name,
+             account_created: obj.account_created,
+             image_url: obj.img && obj.img.href,
+             changesets_count: obj.changesets && obj.changesets.count && obj.changesets.count.toString() || '0',
+             active_blocks: obj.blocks && obj.blocks.received && obj.blocks.received.active && obj.blocks.received.active.toString() || '0'
+           };
+         }
+       };

 
 

-           var parsed = new Date(raw);
-           return new Date(parsed.toUTCString().substr(0, 25));  // convert to local timezone
+       function parseJSON(payload, callback, options) {
+         options = Object.assign({
+           skipSeen: true
+         }, options);
+
+         if (!payload) {
+           return callback({
+             message: 'No JSON',
+             status: -1
+           });

          }
 
          }
 

+         var json = payload;
+         if (_typeof(json) !== 'object') json = JSON.parse(payload);
+         if (!json.elements) return callback({
+           message: 'No JSON',
+           status: -1
+         });
+         var children = json.elements;
+         var handle = window.requestIdleCallback(function () {
+           _deferred["delete"](handle);

 
 

-         function success(selection) {
-           var header = selection
-             .append('div')
-             .attr('class', 'header fillL');
-
-           header
-             .append('h3')
-             .text(_t('success.just_edited'));
-
-           header
-             .append('button')
-             .attr('class', 'close')
-             .on('click', function () { return dispatch$1.call('cancel'); })
-             .call(svgIcon('#iD-icon-close'));
-
-           var body = selection
-             .append('div')
-             .attr('class', 'body save-success fillL');
-
-           var summary = body
-             .append('div')
-             .attr('class', 'save-summary');
-
-           summary
-             .append('h3')
-             .text(_t('success.thank_you' + (_location ? '_location' : ''), { where: _location }));
-
-           summary
-             .append('p')
-             .text(_t('success.help_html'))
-             .append('a')
-             .attr('class', 'link-out')
-             .attr('target', '_blank')
-             .attr('tabindex', -1)
-             .attr('href', _t('success.help_link_url'))
-             .call(svgIcon('#iD-icon-out-link', 'inline'))
-             .append('span')
-             .text(_t('success.help_link_text'));
+           var results = [];
+           var result;

 
 

-           var osm = context.connection();
-           if (!osm) { return; }
+           for (var i = 0; i < children.length; i++) {
+             result = parseChild(children[i]);
+             if (result) results.push(result);
+           }

 
 

-           var changesetURL = osm.changesetURL(_changeset.id);
+           callback(null, results);
+         });

 
 

-           var table = summary
-             .append('table')
-             .attr('class', 'summary-table');
-
-           var row = table
-             .append('tr')
-             .attr('class', 'summary-row');
-
-           row
-             .append('td')
-             .attr('class', 'cell-icon summary-icon')
-             .append('a')
-             .attr('target', '_blank')
-             .attr('href', changesetURL)
-             .append('svg')
-             .attr('class', 'logo-small')
-             .append('use')
-             .attr('xlink:href', '#iD-logo-osm');
-
-           var summaryDetail = row
-             .append('td')
-             .attr('class', 'cell-detail summary-detail');
-
-           summaryDetail
-             .append('a')
-             .attr('class', 'cell-detail summary-view-on-osm')
-             .attr('target', '_blank')
-             .attr('href', changesetURL)
-             .text(_t('success.view_on_osm'));
-
-           summaryDetail
-             .append('div')
-             .html(_t('success.changeset_id', {
-               changeset_id: ("<a href=\"" + changesetURL + "\" target=\"_blank\">" + (_changeset.id) + "</a>")
-             }));
+         _deferred.add(handle);

 
 

+         function parseChild(child) {
+           var parser = jsonparsers[child.type];
+           if (!parser) return null;
+           var uid;
+           uid = osmEntity.id.fromOSM(child.type, child.id);

 
 

-           // Get OSM community index features intersecting the map..
-           ensureOSMCommunityIndex()
-             .then(function (oci) {
-               var communities = [];
-               var properties = oci.query(context.map().center(), true) || [];
-
-               // Gather the communities from the result
-               properties.forEach(function (props) {
-                 var resourceIDs = Array.from(props.resourceIDs);
-                 resourceIDs.forEach(function (resourceID) {
-                   var resource = oci.resources[resourceID];
-                   communities.push({
-                     area: props.area || Infinity,
-                     order: resource.order || 0,
-                     resource: resource
-                   });
-                 });
-               });
+           if (options.skipSeen) {
+             if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity

 
 

-               // sort communities by feature area ascending, community order descending
-               communities.sort(function (a, b) { return a.area - b.area || b.order - a.order; });
+             _tileCache.seen[uid] = true;
+           }

 
 

-               body
-                 .call(showCommunityLinks, communities.map(function (c) { return c.resource; }));
-             });
+           return parser(child, uid);

          }
          }

+       }

 
 

+       function parseUserJSON(payload, callback, options) {
+         options = Object.assign({
+           skipSeen: true
+         }, options);

 
 

-         function showCommunityLinks(selection, resources) {
-           var communityLinks = selection
-             .append('div')
-             .attr('class', 'save-communityLinks');
-
-           communityLinks
-             .append('h3')
-             .text(_t('success.like_osm'));
-
-           var table = communityLinks
-             .append('table')
-             .attr('class', 'community-table');
-
-           var row = table.selectAll('.community-row')
-             .data(resources);
-
-           var rowEnter = row.enter()
-             .append('tr')
-             .attr('class', 'community-row');
-
-           rowEnter
-             .append('td')
-             .attr('class', 'cell-icon community-icon')
-             .append('a')
-             .attr('target', '_blank')
-             .attr('href', function (d) { return d.url; })
-             .append('svg')
-             .attr('class', 'logo-small')
-             .append('use')
-             .attr('xlink:href', function (d) { return ("#community-" + (d.type)); });
-
-           var communityDetail = rowEnter
-             .append('td')
-             .attr('class', 'cell-detail community-detail');
-
-           communityDetail
-             .each(showCommunityDetails);
-
-           communityLinks
-             .append('div')
-             .attr('class', 'community-missing')
-             .text(_t('success.missing'))
-             .append('a')
-             .attr('class', 'link-out')
-             .attr('target', '_blank')
-             .attr('tabindex', -1)
-             .call(svgIcon('#iD-icon-out-link', 'inline'))
-             .attr('href', 'https://github.com/osmlab/osm-community-index/issues')
-             .append('span')
-             .text(_t('success.tell_us'));
+         if (!payload) {
+           return callback({
+             message: 'No JSON',
+             status: -1
+           });

          }
 
          }
 

+         var json = payload;
+         if (_typeof(json) !== 'object') json = JSON.parse(payload);
+         if (!json.users && !json.user) return callback({
+           message: 'No JSON',
+           status: -1
+         });
+         var objs = json.users || [json];
+         var handle = window.requestIdleCallback(function () {
+           _deferred["delete"](handle);

 
 

-         function showCommunityDetails(d) {
-           var selection = select(this);
-           var communityID = d.id;
-           var replacements = {
-             url: linkify(d.url),
-             signupUrl: linkify(d.signupUrl || d.url)
-           };
+           var results = [];
+           var result;

 
 

-           selection
-             .append('div')
-             .attr('class', 'community-name')
-             .append('a')
-             .attr('target', '_blank')
-             .attr('href', d.url)
-             .text(_t(("community." + (d.id) + ".name")));
-
-           var descriptionHTML = _t(("community." + (d.id) + ".description"), replacements);
-
-           if (d.type === 'reddit') {   // linkify subreddits  #4997
-             descriptionHTML = descriptionHTML
-               .replace(/(\/r\/\w*\/*)/i, function (match) { return linkify(d.url, match); });
-           }
-
-           selection
-             .append('div')
-             .attr('class', 'community-description')
-             .html(descriptionHTML);
-
-           if (d.extendedDescription || (d.languageCodes && d.languageCodes.length)) {
-             selection
-               .append('div')
-               .call(uiDisclosure(context, ("community-more-" + (d.id)), false)
-                 .expanded(false)
-                 .updatePreference(false)
-                 .title(_t('success.more'))
-                 .content(showMore)
-               );
+           for (var i = 0; i < objs.length; i++) {
+             result = parseObj(objs[i]);
+             if (result) results.push(result);

            }
 
            }
 

-           var nextEvents = (d.events || [])
-             .map(function (event) {
-               event.date = parseEventDate(event.when);
-               return event;
-             })
-             .filter(function (event) {      // date is valid and future (or today)
-               var t = event.date.getTime();
-               var now = (new Date()).setHours(0,0,0,0);
-               return !isNaN(t) && t >= now;
-             })
-             .sort(function (a, b) {       // sort by date ascending
-               return a.date < b.date ? -1 : a.date > b.date ? 1 : 0;
-             })
-             .slice(0, MAXEVENTS);   // limit number of events shown
+           callback(null, results);
+         });

 
 

-           if (nextEvents.length) {
-             selection
-               .append('div')
-               .call(uiDisclosure(context, ("community-events-" + (d.id)), false)
-                 .expanded(false)
-                 .updatePreference(false)
-                 .title(_t('success.events'))
-                 .content(showNextEvents)
-               )
-               .select('.hide-toggle')
-               .append('span')
-               .attr('class', 'badge-text')
-               .text(nextEvents.length);
+         _deferred.add(handle);
+
+         function parseObj(obj) {
+           var uid = obj.user.id && obj.user.id.toString();
+
+           if (options.skipSeen && _userCache.user[uid]) {
+             delete _userCache.toLoad[uid];
+             return null;

            }
 
            }
 

+           var user = jsonparsers.user(obj.user, uid);
+           _userCache.user[uid] = user;
+           delete _userCache.toLoad[uid];
+           return user;
+         }
+       }

 
 

-           function showMore(selection) {
-             var more = selection.selectAll('.community-more')
-               .data([0]);
+       var parsers = {
+         node: function nodeData(obj, uid) {
+           var attrs = obj.attributes;
+           return new osmNode({
+             id: uid,
+             visible: getVisible(attrs),
+             version: attrs.version.value,
+             changeset: attrs.changeset && attrs.changeset.value,
+             timestamp: attrs.timestamp && attrs.timestamp.value,
+             user: attrs.user && attrs.user.value,
+             uid: attrs.uid && attrs.uid.value,
+             loc: getLoc(attrs),
+             tags: getTags(obj)
+           });
+         },
+         way: function wayData(obj, uid) {
+           var attrs = obj.attributes;
+           return new osmWay({
+             id: uid,
+             visible: getVisible(attrs),
+             version: attrs.version.value,
+             changeset: attrs.changeset && attrs.changeset.value,
+             timestamp: attrs.timestamp && attrs.timestamp.value,
+             user: attrs.user && attrs.user.value,
+             uid: attrs.uid && attrs.uid.value,
+             tags: getTags(obj),
+             nodes: getNodes(obj)
+           });
+         },
+         relation: function relationData(obj, uid) {
+           var attrs = obj.attributes;
+           return new osmRelation({
+             id: uid,
+             visible: getVisible(attrs),
+             version: attrs.version.value,
+             changeset: attrs.changeset && attrs.changeset.value,
+             timestamp: attrs.timestamp && attrs.timestamp.value,
+             user: attrs.user && attrs.user.value,
+             uid: attrs.uid && attrs.uid.value,
+             tags: getTags(obj),
+             members: getMembers(obj)
+           });
+         },
+         note: function parseNote(obj, uid) {
+           var attrs = obj.attributes;
+           var childNodes = obj.childNodes;
+           var props = {};
+           props.id = uid;
+           props.loc = getLoc(attrs); // if notes are coincident, move them apart slightly

 
 

-             var moreEnter = more.enter()
-               .append('div')
-               .attr('class', 'community-more');
+           var coincident = false;
+           var epsilon = 0.00001;

 
 

-             if (d.extendedDescription) {
-               moreEnter
-                 .append('div')
-                 .attr('class', 'community-extended-description')
-                 .html(_t(("community." + (d.id) + ".extendedDescription"), replacements));
+           do {
+             if (coincident) {
+               props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);

              }
 
              }
 

-             if (d.languageCodes && d.languageCodes.length) {
-               var languageList = d.languageCodes
-                 .map(function (code) { return _mainLocalizer.languageName(code); })
-                 .join(', ');
+             var bbox = geoExtent(props.loc).bbox();
+             coincident = _noteCache.rtree.search(bbox).length;
+           } while (coincident); // parse note contents
+

 
 

-               moreEnter
-                 .append('div')
-                 .attr('class', 'community-languages')
-                 .text(_t('success.languages', { languages: languageList }));
+           for (var i = 0; i < childNodes.length; i++) {
+             var node = childNodes[i];
+             var nodeName = node.nodeName;
+             if (nodeName === '#text') continue; // if the element is comments, parse the comments
+
+             if (nodeName === 'comments') {
+               props[nodeName] = parseComments(node.childNodes);
+             } else {
+               props[nodeName] = node.textContent;

              }
            }
 
              }
            }
 

+           var note = new osmNote(props);
+           var item = encodeNoteRtree(note);
+           _noteCache.note[note.id] = note;

 
 

-           function showNextEvents(selection) {
-             var events = selection
-               .append('div')
-               .attr('class', 'community-events');
+           _noteCache.rtree.insert(item);

 
 

-             var item = events.selectAll('.community-event')
-               .data(nextEvents);
+           return note;
+         },
+         user: function parseUser(obj, uid) {
+           var attrs = obj.attributes;
+           var user = {
+             id: uid,
+             display_name: attrs.display_name && attrs.display_name.value,
+             account_created: attrs.account_created && attrs.account_created.value,
+             changesets_count: '0',
+             active_blocks: '0'
+           };
+           var img = obj.getElementsByTagName('img');

 
 

-             var itemEnter = item.enter()
-               .append('div')
-               .attr('class', 'community-event');
+           if (img && img[0] && img[0].getAttribute('href')) {
+             user.image_url = img[0].getAttribute('href');
+           }

 
 

-             itemEnter
-               .append('div')
-               .attr('class', 'community-event-name')
-               .append('a')
-               .attr('target', '_blank')
-               .attr('href', function (d) { return d.url; })
-               .text(function (d) {
-                 var name = d.name;
-                 if (d.i18n && d.id) {
-                   name = _t(("community." + communityID + ".events." + (d.id) + ".name"), { default: name });
-                 }
-                 return name;
-               });
+           var changesets = obj.getElementsByTagName('changesets');

 
 

-             itemEnter
-               .append('div')
-               .attr('class', 'community-event-when')
-               .text(function (d) {
-                 var options = { weekday: 'short', day: 'numeric', month: 'short', year: 'numeric' };
-                 if (d.date.getHours() || d.date.getMinutes()) {   // include time if it has one
-                   options.hour = 'numeric';
-                   options.minute = 'numeric';
-                 }
-                 return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
-               });
+           if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
+             user.changesets_count = changesets[0].getAttribute('count');
+           }

 
 

-             itemEnter
-               .append('div')
-               .attr('class', 'community-event-where')
-               .text(function (d) {
-                 var where = d.where;
-                 if (d.i18n && d.id) {
-                   where = _t(("community." + communityID + ".events." + (d.id) + ".where"), { default: where });
-                 }
-                 return where;
-               });
+           var blocks = obj.getElementsByTagName('blocks');

 
 

-             itemEnter
-               .append('div')
-               .attr('class', 'community-event-description')
-               .text(function (d) {
-                 var description = d.description;
-                 if (d.i18n && d.id) {
-                   description = _t(("community." + communityID + ".events." + (d.id) + ".description"), { default: description });
-                 }
-                 return description;
-               });
+           if (blocks && blocks[0]) {
+             var received = blocks[0].getElementsByTagName('received');
+
+             if (received && received[0] && received[0].getAttribute('active')) {
+               user.active_blocks = received[0].getAttribute('active');
+             }

            }
 
            }
 

+           _userCache.user[uid] = user;
+           delete _userCache.toLoad[uid];
+           return user;
+         }
+       };
+
+       function parseXML(xml, callback, options) {
+         options = Object.assign({
+           skipSeen: true
+         }, options);
+
+         if (!xml || !xml.childNodes) {
+           return callback({
+             message: 'No XML',
+             status: -1
+           });
+         }
+
+         var root = xml.childNodes[0];
+         var children = root.childNodes;
+         var handle = window.requestIdleCallback(function () {
+           _deferred["delete"](handle);
+
+           var results = [];
+           var result;

 
 

-           function linkify(url, text) {
-             text = text || url;
-             return ("<a target=\"_blank\" href=\"" + url + "\">" + text + "</a>");
+           for (var i = 0; i < children.length; i++) {
+             result = parseChild(children[i]);
+             if (result) results.push(result);

            }
            }

-         }

 
 

+           callback(null, results);
+         });

 
 

-         success.changeset = function(val) {
-           if (!arguments.length) { return _changeset; }
-           _changeset = val;
-           return success;
-         };
+         _deferred.add(handle);

 
 

+         function parseChild(child) {
+           var parser = parsers[child.nodeName];
+           if (!parser) return null;
+           var uid;

 
 

-         success.location = function(val) {
-           if (!arguments.length) { return _location; }
-           _location = val;
-           return success;
-         };
+           if (child.nodeName === 'user') {
+             uid = child.attributes.id.value;

 
 

+             if (options.skipSeen && _userCache.user[uid]) {
+               delete _userCache.toLoad[uid];
+               return null;
+             }
+           } else if (child.nodeName === 'note') {
+             uid = child.getElementsByTagName('id')[0].textContent;
+           } else {
+             uid = osmEntity.id.fromOSM(child.nodeName, child.attributes.id.value);

 
 

-         return utilRebind(success, dispatch$1, 'on');
-       }
+             if (options.skipSeen) {
+               if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity

 
 

-       function modeSave(context) {
-           var mode = { id: 'save' };
-           var keybinding = utilKeybinding('modeSave');
+               _tileCache.seen[uid] = true;
+             }
+           }

 
 

-           var commit = uiCommit(context)
-               .on('cancel', cancel);
-           var _conflictsUi; // uiConflicts
+           return parser(child, uid);
+         }
+       } // replace or remove note from rtree

 
 

-           var _location;
-           var _success;

 
 

-           var uploader = context.uploader()
-               .on('saveStarted.modeSave', function() {
-                   keybindingOff();
-               })
-               // fire off some async work that we want to be ready later
-               .on('willAttemptUpload.modeSave', prepareForSuccess)
-               .on('progressChanged.modeSave', showProgress)
-               .on('resultNoChanges.modeSave', function() {
-                   cancel();
-               })
-               .on('resultErrors.modeSave', showErrors)
-               .on('resultConflicts.modeSave', showConflicts)
-               .on('resultSuccess.modeSave', showSuccess);
+       function updateRtree(item, replace) {
+         _noteCache.rtree.remove(item, function isEql(a, b) {
+           return a.data.id === b.data.id;
+         });
+
+         if (replace) {
+           _noteCache.rtree.insert(item);
+         }
+       }

 
 

+       function wrapcb(thisArg, callback, cid) {
+         return function (err, result) {
+           if (err) {
+             // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
+             if (err.status === 400 || err.status === 401 || err.status === 403) {
+               thisArg.logout();
+             }

 
 

-           function cancel() {
-               context.enter(modeBrowse(context));
+             return callback.call(thisArg, err);
+           } else if (thisArg.getConnectionId() !== cid) {
+             return callback.call(thisArg, {
+               message: 'Connection Switched',
+               status: -1
+             });
+           } else {
+             return callback.call(thisArg, err, result);

            }
            }

+         };
+       }

 
 

+       var serviceOsm = {
+         init: function init() {
+           utilRebind(this, dispatch$2, 'on');
+         },
+         reset: function reset() {
+           Array.from(_deferred).forEach(function (handle) {
+             window.cancelIdleCallback(handle);

 
 

-           function showProgress(num, total) {
-               var modal = context.container().select('.loading-modal .modal-section');
-               var progress = modal.selectAll('.progress')
-                   .data([0]);
+             _deferred["delete"](handle);
+           });
+           _connectionID++;
+           _userChangesets = undefined;
+           _userDetails = undefined;
+           _rateLimitError = undefined;
+           Object.values(_tileCache.inflight).forEach(abortRequest$2);
+           Object.values(_noteCache.inflight).forEach(abortRequest$2);
+           Object.values(_noteCache.inflightPost).forEach(abortRequest$2);
+           if (_changeset.inflight) abortRequest$2(_changeset.inflight);
+           _tileCache = {
+             toLoad: {},
+             loaded: {},
+             inflight: {},
+             seen: {},
+             rtree: new RBush()
+           };
+           _noteCache = {
+             toLoad: {},
+             loaded: {},
+             inflight: {},
+             inflightPost: {},
+             note: {},
+             closed: {},
+             rtree: new RBush()
+           };
+           _userCache = {
+             toLoad: {},
+             user: {}
+           };
+           _cachedApiStatus = undefined;
+           _changeset = {};
+           return this;
+         },
+         getConnectionId: function getConnectionId() {
+           return _connectionID;
+         },
+         changesetURL: function changesetURL(changesetID) {
+           return urlroot + '/changeset/' + changesetID;
+         },
+         changesetsURL: function changesetsURL(center, zoom) {
+           var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
+           return urlroot + '/history#map=' + Math.floor(zoom) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
+         },
+         entityURL: function entityURL(entity) {
+           return urlroot + '/' + entity.type + '/' + entity.osmId();
+         },
+         historyURL: function historyURL(entity) {
+           return urlroot + '/' + entity.type + '/' + entity.osmId() + '/history';
+         },
+         userURL: function userURL(username) {
+           return urlroot + '/user/' + username;
+         },
+         noteURL: function noteURL(note) {
+           return urlroot + '/note/' + note.id;
+         },
+         noteReportURL: function noteReportURL(note) {
+           return urlroot + '/reports/new?reportable_type=Note&reportable_id=' + note.id;
+         },
+         // Generic method to load data from the OSM API
+         // Can handle either auth or unauth calls.
+         loadFromAPI: function loadFromAPI(path, callback, options) {
+           options = Object.assign({
+             skipSeen: true
+           }, options);
+           var that = this;
+           var cid = _connectionID;

 
 

-               // enter/update
-               progress.enter()
-                   .append('div')
-                   .attr('class', 'progress')
-                   .merge(progress)
-                   .text(_t('save.conflict_progress', { num: num, total: total }));
+           function done(err, payload) {
+             if (that.getConnectionId() !== cid) {
+               if (callback) callback({
+                 message: 'Connection Switched',
+                 status: -1
+               });
+               return;
+             }
+
+             var isAuthenticated = that.authenticated(); // 400 Bad Request, 401 Unauthorized, 403 Forbidden
+             // Logout and retry the request..
+
+             if (isAuthenticated && err && err.status && (err.status === 400 || err.status === 401 || err.status === 403)) {
+               that.logout();
+               that.loadFromAPI(path, callback, options); // else, no retry..
+             } else {
+               // 509 Bandwidth Limit Exceeded, 429 Too Many Requests
+               // Set the rateLimitError flag and trigger a warning..
+               if (!isAuthenticated && !_rateLimitError && err && err.status && (err.status === 509 || err.status === 429)) {
+                 _rateLimitError = err;
+                 dispatch$2.call('change');
+                 that.reloadApiStatus();
+               } else if (err && _cachedApiStatus === 'online' || !err && _cachedApiStatus !== 'online') {
+                 // If the response's error state doesn't match the status,
+                 // it's likely we lost or gained the connection so reload the status
+                 that.reloadApiStatus();
+               }
+
+               if (callback) {
+                 if (err) {
+                   return callback(err);
+                 } else {
+                   if (path.indexOf('.json') !== -1) {
+                     return parseJSON(payload, callback, options);
+                   } else {
+                     return parseXML(payload, callback, options);
+                   }
+                 }
+               }
+             }

            }
 
            }
 

+           if (this.authenticated()) {
+             return oauth.xhr({
+               method: 'GET',
+               path: path
+             }, done);
+           } else {
+             var url = urlroot + path;
+             var controller = new AbortController();
+             var fn;

 
 

-           function showConflicts(changeset, conflicts, origChanges) {
+             if (path.indexOf('.json') !== -1) {
+               fn = d3_json;
+             } else {
+               fn = d3_xml;
+             }

 
 

-               var selection = context.container()
-                   .select('.sidebar')
-                   .append('div')
-                   .attr('class','sidebar-component');
-
-               context.container().selectAll('.main-content')
-                   .classed('active', true)
-                   .classed('inactive', false);
-
-               _conflictsUi = uiConflicts(context)
-                   .conflictList(conflicts)
-                   .origChanges(origChanges)
-                   .on('cancel', function() {
-                       context.container().selectAll('.main-content')
-                           .classed('active', false)
-                           .classed('inactive', true);
-                       selection.remove();
-                       keybindingOn();
-
-                       uploader.cancelConflictResolution();
-                   })
-                   .on('save', function() {
-                       context.container().selectAll('.main-content')
-                           .classed('active', false)
-                           .classed('inactive', true);
-                       selection.remove();
-
-                       uploader.processResolvedConflicts(changeset);
-                   });
+             fn(url, {
+               signal: controller.signal
+             }).then(function (data) {
+               done(null, data);
+             })["catch"](function (err) {
+               if (err.name === 'AbortError') return; // d3-fetch includes status in the error message,
+               // but we can't access the response itself
+               // https://github.com/d3/d3-fetch/issues/27
+
+               var match = err.message.match(/^\d{3}/);
+
+               if (match) {
+                 done({
+                   status: +match[0],
+                   statusText: err.message
+                 });
+               } else {
+                 done(err.message);
+               }
+             });
+             return controller;
+           }
+         },
+         // Load a single entity by id (ways and relations use the `/full` call to include
+         // nodes and members). Parent relations are not included, see `loadEntityRelations`.
+         // GET /api/0.6/node/#id
+         // GET /api/0.6/[way|relation]/#id/full
+         loadEntity: function loadEntity(id, callback) {
+           var type = osmEntity.id.type(id);
+           var osmID = osmEntity.id.toOSM(id);
+           var options = {
+             skipSeen: false
+           };
+           this.loadFromAPI('/api/0.6/' + type + '/' + osmID + (type !== 'node' ? '/full' : '') + '.json', function (err, entities) {
+             if (callback) callback(err, {
+               data: entities
+             });
+           }, options);
+         },
+         // Load a single entity with a specific version
+         // GET /api/0.6/[node|way|relation]/#id/#version
+         loadEntityVersion: function loadEntityVersion(id, version, callback) {
+           var type = osmEntity.id.type(id);
+           var osmID = osmEntity.id.toOSM(id);
+           var options = {
+             skipSeen: false
+           };
+           this.loadFromAPI('/api/0.6/' + type + '/' + osmID + '/' + version + '.json', function (err, entities) {
+             if (callback) callback(err, {
+               data: entities
+             });
+           }, options);
+         },
+         // Load the relations of a single entity with the given.
+         // GET /api/0.6/[node|way|relation]/#id/relations
+         loadEntityRelations: function loadEntityRelations(id, callback) {
+           var type = osmEntity.id.type(id);
+           var osmID = osmEntity.id.toOSM(id);
+           var options = {
+             skipSeen: false
+           };
+           this.loadFromAPI('/api/0.6/' + type + '/' + osmID + '/relations.json', function (err, entities) {
+             if (callback) callback(err, {
+               data: entities
+             });
+           }, options);
+         },
+         // Load multiple entities in chunks
+         // (note: callback may be called multiple times)
+         // Unlike `loadEntity`, child nodes and members are not fetched
+         // GET /api/0.6/[nodes|ways|relations]?#parameters
+         loadMultiple: function loadMultiple(ids, callback) {
+           var that = this;
+           var groups = utilArrayGroupBy(utilArrayUniq(ids), osmEntity.id.type);
+           Object.keys(groups).forEach(function (k) {
+             var type = k + 's'; // nodes, ways, relations

 
 

-               selection.call(_conflictsUi);
+             var osmIDs = groups[k].map(function (id) {
+               return osmEntity.id.toOSM(id);
+             });
+             var options = {
+               skipSeen: false
+             };
+             utilArrayChunk(osmIDs, 150).forEach(function (arr) {
+               that.loadFromAPI('/api/0.6/' + type + '.json?' + type + '=' + arr.join(), function (err, entities) {
+                 if (callback) callback(err, {
+                   data: entities
+                 });
+               }, options);
+             });
+           });
+         },
+         // Create, upload, and close a changeset
+         // PUT /api/0.6/changeset/create
+         // POST /api/0.6/changeset/#id/upload
+         // PUT /api/0.6/changeset/#id/close
+         putChangeset: function putChangeset(changeset, changes, callback) {
+           var cid = _connectionID;
+
+           if (_changeset.inflight) {
+             return callback({
+               message: 'Changeset already inflight',
+               status: -2
+             }, changeset);
+           } else if (_changeset.open) {
+             // reuse existing open changeset..
+             return createdChangeset.call(this, null, _changeset.open);
+           } else {
+             // Open a new changeset..
+             var options = {
+               method: 'PUT',
+               path: '/api/0.6/changeset/create',
+               options: {
+                 header: {
+                   'Content-Type': 'text/xml'
+                 }
+               },
+               content: JXON.stringify(changeset.asJXON())
+             };
+             _changeset.inflight = oauth.xhr(options, wrapcb(this, createdChangeset, cid));

            }
 
            }
 

+           function createdChangeset(err, changesetID) {
+             _changeset.inflight = null;

 
 

-           function showErrors(errors) {
-               keybindingOn();
+             if (err) {
+               return callback(err, changeset);
+             }

 
 

-               var selection = uiConfirm(context.container());
-               selection
-                   .select('.modal-section.header')
-                   .append('h3')
-                   .text(_t('save.error'));
+             _changeset.open = changesetID;
+             changeset = changeset.update({
+               id: changesetID
+             }); // Upload the changeset..

 
 

-               addErrors(selection, errors);
-               selection.okButton();
+             var options = {
+               method: 'POST',
+               path: '/api/0.6/changeset/' + changesetID + '/upload',
+               options: {
+                 header: {
+                   'Content-Type': 'text/xml'
+                 }
+               },
+               content: JXON.stringify(changeset.osmChangeJXON(changes))
+             };
+             _changeset.inflight = oauth.xhr(options, wrapcb(this, uploadedChangeset, cid));

            }
 
            }
 

+           function uploadedChangeset(err) {
+             _changeset.inflight = null;
+             if (err) return callback(err, changeset); // Upload was successful, safe to call the callback.
+             // Add delay to allow for postgres replication #1646 #2678

 
 

-           function addErrors(selection, data) {
-               var message = selection
-                   .select('.modal-section.message-text');
+             window.setTimeout(function () {
+               callback(null, changeset);
+             }, 2500);
+             _changeset.open = null; // At this point, we don't really care if the connection was switched..
+             // Only try to close the changeset if we're still talking to the same server.

 
 

-               var items = message
-                   .selectAll('.error-container')
-                   .data(data);
+             if (this.getConnectionId() === cid) {
+               // Still attempt to close changeset, but ignore response because #2667
+               oauth.xhr({
+                 method: 'PUT',
+                 path: '/api/0.6/changeset/' + changeset.id + '/close',
+                 options: {
+                   header: {
+                     'Content-Type': 'text/xml'
+                   }
+                 }
+               }, function () {
+                 return true;
+               });
+             }
+           }
+         },
+         // Load multiple users in chunks
+         // (note: callback may be called multiple times)
+         // GET /api/0.6/users?users=#id1,#id2,...,#idn
+         loadUsers: function loadUsers(uids, callback) {
+           var toLoad = [];
+           var cached = [];
+           utilArrayUniq(uids).forEach(function (uid) {
+             if (_userCache.user[uid]) {
+               delete _userCache.toLoad[uid];
+               cached.push(_userCache.user[uid]);
+             } else {
+               toLoad.push(uid);
+             }
+           });

 
 

-               var enter = items.enter()
-                   .append('div')
-                   .attr('class', 'error-container');
-
-               enter
-                   .append('a')
-                   .attr('class', 'error-description')
-                   .attr('href', '#')
-                   .classed('hide-toggle', true)
-                   .text(function(d) { return d.msg || _t('save.unknown_error_details'); })
-                   .on('click', function() {
-                       event.preventDefault();
-
-                       var error = select(this);
-                       var detail = select(this.nextElementSibling);
-                       var exp = error.classed('expanded');
-
-                       detail.style('display', exp ? 'none' : 'block');
-                       error.classed('expanded', !exp);
-                   });
+           if (cached.length || !this.authenticated()) {
+             callback(undefined, cached);
+             if (!this.authenticated()) return; // require auth
+           }

 
 

-               var details = enter
-                   .append('div')
-                   .attr('class', 'error-detail-container')
-                   .style('display', 'none');
-
-               details
-                   .append('ul')
-                   .attr('class', 'error-detail-list')
-                   .selectAll('li')
-                   .data(function(d) { return d.details || []; })
-                   .enter()
-                   .append('li')
-                   .attr('class', 'error-detail-item')
-                   .text(function(d) { return d; });
+           utilArrayChunk(toLoad, 150).forEach(function (arr) {
+             oauth.xhr({
+               method: 'GET',
+               path: '/api/0.6/users.json?users=' + arr.join()
+             }, wrapcb(this, done, _connectionID));
+           }.bind(this));

 
 

-               items.exit()
-                   .remove();
+           function done(err, payload) {
+             if (err) return callback(err);
+             var options = {
+               skipSeen: true
+             };
+             return parseUserJSON(payload, function (err, results) {
+               if (err) return callback(err);
+               return callback(undefined, results);
+             }, options);
+           }
+         },
+         // Load a given user by id
+         // GET /api/0.6/user/#id
+         loadUser: function loadUser(uid, callback) {
+           if (_userCache.user[uid] || !this.authenticated()) {
+             // require auth
+             delete _userCache.toLoad[uid];
+             return callback(undefined, _userCache.user[uid]);
+           }
+
+           oauth.xhr({
+             method: 'GET',
+             path: '/api/0.6/user/' + uid + '.json'
+           }, wrapcb(this, done, _connectionID));
+
+           function done(err, payload) {
+             if (err) return callback(err);
+             var options = {
+               skipSeen: true
+             };
+             return parseUserJSON(payload, function (err, results) {
+               if (err) return callback(err);
+               return callback(undefined, results[0]);
+             }, options);
+           }
+         },
+         // Load the details of the logged-in user
+         // GET /api/0.6/user/details
+         userDetails: function userDetails(callback) {
+           if (_userDetails) {
+             // retrieve cached
+             return callback(undefined, _userDetails);

            }
 
            }
 

+           oauth.xhr({
+             method: 'GET',
+             path: '/api/0.6/user/details.json'
+           }, wrapcb(this, done, _connectionID));
+
+           function done(err, payload) {
+             if (err) return callback(err);
+             var options = {
+               skipSeen: false
+             };
+             return parseUserJSON(payload, function (err, results) {
+               if (err) return callback(err);
+               _userDetails = results[0];
+               return callback(undefined, _userDetails);
+             }, options);
+           }
+         },
+         // Load previous changesets for the logged in user
+         // GET /api/0.6/changesets?user=#id
+         userChangesets: function userChangesets(callback) {
+           if (_userChangesets) {
+             // retrieve cached
+             return callback(undefined, _userChangesets);
+           }

 
 

-           function showSuccess(changeset) {
-               commit.reset();
+           this.userDetails(wrapcb(this, gotDetails, _connectionID));

 
 

-               var ui = _success
-                   .changeset(changeset)
-                   .location(_location)
-                   .on('cancel', function() { context.ui().sidebar.hide(); });
+           function gotDetails(err, user) {
+             if (err) {
+               return callback(err);
+             }

 
 

-               context.enter(modeBrowse(context).sidebar(ui));
+             oauth.xhr({
+               method: 'GET',
+               path: '/api/0.6/changesets?user=' + user.id
+             }, wrapcb(this, done, _connectionID));

            }
 
            }
 

+           function done(err, xml) {
+             if (err) {
+               return callback(err);
+             }

 
 

-           function keybindingOn() {
-               select(document)
-                   .call(keybinding.on('⎋', cancel, true));
+             _userChangesets = Array.prototype.map.call(xml.getElementsByTagName('changeset'), function (changeset) {
+               return {
+                 tags: getTags(changeset)
+               };
+             }).filter(function (changeset) {
+               var comment = changeset.tags.comment;
+               return comment && comment !== '';
+             });
+             return callback(undefined, _userChangesets);

            }
            }

+         },
+         // Fetch the status of the OSM API
+         // GET /api/capabilities
+         status: function status(callback) {
+           var url = urlroot + '/api/capabilities';
+           var errback = wrapcb(this, done, _connectionID);
+           d3_xml(url).then(function (data) {
+             errback(null, data);
+           })["catch"](function (err) {
+             errback(err.message);
+           });

 
 

+           function done(err, xml) {
+             if (err) {
+               // the status is null if no response could be retrieved
+               return callback(err, null);
+             } // update blocklists

 
 

-           function keybindingOff() {
-               select(document)
-                   .call(keybinding.unbind);
-           }

 
 

+             var elements = xml.getElementsByTagName('blacklist');
+             var regexes = [];

 
 

-           // Reverse geocode current map location so we can display a message on
-           // the success screen like "Thank you for editing around place, region."
-           function prepareForSuccess() {
-               _success = uiSuccess(context);
-               _location = null;
-               if (!services.geocoder) { return; }
+             for (var i = 0; i < elements.length; i++) {
+               var regexString = elements[i].getAttribute('regex'); // needs unencode?

 
 

-               services.geocoder.reverse(context.map().center(), function(err, result) {
-                   if (err || !result || !result.address) { return; }
+               if (regexString) {
+                 try {
+                   var regex = new RegExp(regexString);
+                   regexes.push(regex);
+                 } catch (e) {
+                   /* noop */
+                 }
+               }
+             }

 
 

-                   var addr = result.address;
-                   var place = (addr && (addr.town || addr.city || addr.county)) || '';
-                   var region = (addr && (addr.state || addr.country)) || '';
-                   var separator = (place && region) ? _t('success.thank_you_where.separator') : '';
+             if (regexes.length) {
+               _imageryBlocklists = regexes;
+             }

 
 

-                   _location = _t('success.thank_you_where.format',
-                       { place: place, separator: separator, region: region }
-                   );
+             if (_rateLimitError) {
+               return callback(_rateLimitError, 'rateLimited');
+             } else {
+               var waynodes = xml.getElementsByTagName('waynodes');
+               var maxWayNodes = waynodes.length && parseInt(waynodes[0].getAttribute('maximum'), 10);
+               if (maxWayNodes && isFinite(maxWayNodes)) _maxWayNodes = maxWayNodes;
+               var apiStatus = xml.getElementsByTagName('status');
+               var val = apiStatus[0].getAttribute('api');
+               return callback(undefined, val);
+             }
+           }
+         },
+         // Calls `status` and dispatches an `apiStatusChange` event if the returned
+         // status differs from the cached status.
+         reloadApiStatus: function reloadApiStatus() {
+           // throttle to avoid unnecessary API calls
+           if (!this.throttledReloadApiStatus) {
+             var that = this;
+             this.throttledReloadApiStatus = throttle(function () {
+               that.status(function (err, status) {
+                 if (status !== _cachedApiStatus) {
+                   _cachedApiStatus = status;
+                   dispatch$2.call('apiStatusChange', that, err, status);
+                 }

                });
                });

+             }, 500);

            }
 
            }
 

+           this.throttledReloadApiStatus();
+         },
+         // Returns the maximum number of nodes a single way can have
+         maxWayNodes: function maxWayNodes() {
+           return _maxWayNodes;
+         },
+         // Load data (entities) from the API in tiles
+         // GET /api/0.6/map?bbox=
+         loadTiles: function loadTiles(projection, callback) {
+           if (_off) return; // determine the needed tiles to cover the view

 
 

-           mode.selectedIDs = function() {
-               return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
-           };
-
+           var tiles = tiler$2.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection); // abort inflight requests that are no longer needed

 
 

-           mode.enter = function() {
-               // Show sidebar
-               context.ui().sidebar.expand();
+           var hadRequests = hasInflightRequests(_tileCache);
+           abortUnwantedRequests(_tileCache, tiles);

 
 

-               function done() {
-                   context.ui().sidebar.show(commit);
-               }
+           if (hadRequests && !hasInflightRequests(_tileCache)) {
+             dispatch$2.call('loaded'); // stop the spinner
+           } // issue new requests..

 
 

-               keybindingOn();

 
 

-               context.container().selectAll('.main-content')
-                   .classed('active', false)
-                   .classed('inactive', true);
+           tiles.forEach(function (tile) {
+             this.loadTile(tile, callback);
+           }, this);
+         },
+         // Load a single data tile
+         // GET /api/0.6/map?bbox=
+         loadTile: function loadTile(tile, callback) {
+           if (_off) return;
+           if (_tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;

 
 

-               var osm = context.connection();
-               if (!osm) {
-                   cancel();
-                   return;
-               }
+           if (!hasInflightRequests(_tileCache)) {
+             dispatch$2.call('loading'); // start the spinner
+           }

 
 

-               if (osm.authenticated()) {
-                   done();
-               } else {
-                   osm.authenticate(function(err) {
-                       if (err) {
-                           cancel();
-                       } else {
-                           done();
-                       }
-                   });
-               }
+           var path = '/api/0.6/map.json?bbox=';
+           var options = {
+             skipSeen: true

            };
            };

+           _tileCache.inflight[tile.id] = this.loadFromAPI(path + tile.extent.toParam(), tileCallback, options);

 
 

+           function tileCallback(err, parsed) {
+             delete _tileCache.inflight[tile.id];

 
 

-           mode.exit = function() {
+             if (!err) {
+               delete _tileCache.toLoad[tile.id];
+               _tileCache.loaded[tile.id] = true;
+               var bbox = tile.extent.bbox();
+               bbox.id = tile.id;

 
 

-               keybindingOff();
+               _tileCache.rtree.insert(bbox);
+             }

 
 

-               context.container().selectAll('.main-content')
-                   .classed('active', true)
-                   .classed('inactive', false);
+             if (callback) {
+               callback(err, Object.assign({
+                 data: parsed
+               }, tile));
+             }

 
 

-               context.ui().sidebar.hide();
-           };
+             if (!hasInflightRequests(_tileCache)) {
+               dispatch$2.call('loaded'); // stop the spinner
+             }
+           }
+         },
+         isDataLoaded: function isDataLoaded(loc) {
+           var bbox = {
+             minX: loc[0],
+             minY: loc[1],
+             maxX: loc[0],
+             maxY: loc[1]
+           };
+           return _tileCache.rtree.collides(bbox);
+         },
+         // load the tile that covers the given `loc`
+         loadTileAtLoc: function loadTileAtLoc(loc, callback) {
+           // Back off if the toLoad queue is filling up.. re #6417
+           // (Currently `loadTileAtLoc` requests are considered low priority - used by operations to
+           // let users safely edit geometries which extend to unloaded tiles.  We can drop some.)
+           if (Object.keys(_tileCache.toLoad).length > 50) return;
+           var k = geoZoomToScale(_tileZoom + 1);
+           var offset = geoRawMercator().scale(k)(loc);
+           var projection = geoRawMercator().transform({
+             k: k,
+             x: -offset[0],
+             y: -offset[1]
+           });
+           var tiles = tiler$2.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection);
+           tiles.forEach(function (tile) {
+             if (_tileCache.toLoad[tile.id] || _tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;
+             _tileCache.toLoad[tile.id] = true;
+             this.loadTile(tile, callback);
+           }, this);
+         },
+         // Load notes from the API in tiles
+         // GET /api/0.6/notes?bbox=
+         loadNotes: function loadNotes(projection, noteOptions) {
+           noteOptions = Object.assign({
+             limit: 10000,
+             closed: 7
+           }, noteOptions);
+           if (_off) return;
+           var that = this;
+           var path = '/api/0.6/notes?limit=' + noteOptions.limit + '&closed=' + noteOptions.closed + '&bbox=';

 
 

-           return mode;
-       }
+           var throttleLoadUsers = throttle(function () {
+             var uids = Object.keys(_userCache.toLoad);
+             if (!uids.length) return;
+             that.loadUsers(uids, function () {}); // eagerly load user details
+           }, 750); // determine the needed tiles to cover the view

 
 

-       function uiToolOldDrawModes(context) {

 
 

-           var tool = {
-               id: 'old_modes',
-               label: _t('toolbar.add_feature')
-           };
+           var tiles = tiler$2.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed

 
 

-           var modes = [
-               modeAddPoint(context, {
-                   title: _t('modes.add_point.title'),
-                   button: 'point',
-                   description: _t('modes.add_point.description'),
-                   preset: _mainPresetIndex.item('point'),
-                   key: '1'
-               }),
-               modeAddLine(context, {
-                   title: _t('modes.add_line.title'),
-                   button: 'line',
-                   description: _t('modes.add_line.description'),
-                   preset: _mainPresetIndex.item('line'),
-                   key: '2'
-               }),
-               modeAddArea(context, {
-                   title: _t('modes.add_area.title'),
-                   button: 'area',
-                   description: _t('modes.add_area.description'),
-                   preset: _mainPresetIndex.item('area'),
-                   key: '3'
-               })
-           ];
+           abortUnwantedRequests(_noteCache, tiles); // issue new requests..

 
 

+           tiles.forEach(function (tile) {
+             if (_noteCache.loaded[tile.id] || _noteCache.inflight[tile.id]) return;
+             var options = {
+               skipSeen: false
+             };
+             _noteCache.inflight[tile.id] = that.loadFromAPI(path + tile.extent.toParam(), function (err) {
+               delete _noteCache.inflight[tile.id];

 
 

-           function enabled() {
-               return osmEditable();
-           }
+               if (!err) {
+                 _noteCache.loaded[tile.id] = true;
+               }

 
 

-           function osmEditable() {
-               return context.editable();
+               throttleLoadUsers();
+               dispatch$2.call('loadedNotes');
+             }, options);
+           });
+         },
+         // Create a note
+         // POST /api/0.6/notes?params
+         postNoteCreate: function postNoteCreate(note, callback) {
+           if (!this.authenticated()) {
+             return callback({
+               message: 'Not Authenticated',
+               status: -3
+             }, note);

            }
 
            }
 

-           modes.forEach(function(mode) {
-               context.keybinding().on(mode.key, function() {
-                   if (!enabled()) { return; }
-
-                   if (mode.id === context.mode().id) {
-                       context.enter(modeBrowse(context));
-                   } else {
-                       context.enter(mode);
-                   }
-               });
-           });
+           if (_noteCache.inflightPost[note.id]) {
+             return callback({
+               message: 'Note update already inflight',
+               status: -2
+             }, note);
+           }

 
 

-           tool.render = function(selection) {
+           if (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required

 
 

-               var wrap = selection
-                   .append('div')
-                   .attr('class', 'joined')
-                   .style('display', 'flex');
+           var comment = note.newComment;

 
 

-               var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
+           if (note.newCategory && note.newCategory !== 'None') {
+             comment += ' #' + note.newCategory;
+           }

 
 

-               context.map()
-                   .on('move.modes', debouncedUpdate)
-                   .on('drawn.modes', debouncedUpdate);
+           var path = '/api/0.6/notes?' + utilQsString({
+             lon: note.loc[0],
+             lat: note.loc[1],
+             text: comment
+           });
+           _noteCache.inflightPost[note.id] = oauth.xhr({
+             method: 'POST',
+             path: path
+           }, wrapcb(this, done, _connectionID));

 
 

-               context
-                   .on('enter.modes', update);
+           function done(err, xml) {
+             delete _noteCache.inflightPost[note.id];

 
 

-               update();
+             if (err) {
+               return callback(err);
+             } // we get the updated note back, remove from caches and reparse..

 
 
 
 

-               function update() {
+             this.removeNote(note);
+             var options = {
+               skipSeen: false
+             };
+             return parseXML(xml, function (err, results) {
+               if (err) {
+                 return callback(err);
+               } else {
+                 return callback(undefined, results[0]);
+               }
+             }, options);
+           }
+         },
+         // Update a note
+         // POST /api/0.6/notes/#id/comment?text=comment
+         // POST /api/0.6/notes/#id/close?text=comment
+         // POST /api/0.6/notes/#id/reopen?text=comment
+         postNoteUpdate: function postNoteUpdate(note, newStatus, callback) {
+           if (!this.authenticated()) {
+             return callback({
+               message: 'Not Authenticated',
+               status: -3
+             }, note);
+           }
+
+           if (_noteCache.inflightPost[note.id]) {
+             return callback({
+               message: 'Note update already inflight',
+               status: -2
+             }, note);
+           }
+
+           var action;
+
+           if (note.status !== 'closed' && newStatus === 'closed') {
+             action = 'close';
+           } else if (note.status !== 'open' && newStatus === 'open') {
+             action = 'reopen';
+           } else {
+             action = 'comment';
+             if (!note.newComment) return; // when commenting, comment required
+           }

 
 

-                   var buttons = wrap.selectAll('button.add-button')
-                       .data(modes, function(d) { return d.id; });
+           var path = '/api/0.6/notes/' + note.id + '/' + action;

 
 

-                   // exit
-                   buttons.exit()
-                       .remove();
+           if (note.newComment) {
+             path += '?' + utilQsString({
+               text: note.newComment
+             });
+           }

 
 

-                   // enter
-                   var buttonsEnter = buttons.enter()
-                       .append('button')
-                       .attr('class', function(d) { return d.id + ' add-button bar-button'; })
-                       .on('click.mode-buttons', function(d) {
-                           if (!enabled()) { return; }
+           _noteCache.inflightPost[note.id] = oauth.xhr({
+             method: 'POST',
+             path: path
+           }, wrapcb(this, done, _connectionID));

 
 

-                           // When drawing, ignore accidental clicks on mode buttons - #4042
-                           var currMode = context.mode().id;
-                           if (/^draw/.test(currMode)) { return; }
+           function done(err, xml) {
+             delete _noteCache.inflightPost[note.id];

 
 

-                           if (d.id === currMode) {
-                               context.enter(modeBrowse(context));
-                           } else {
-                               context.enter(d);
-                           }
-                       })
-                       .call(uiTooltip()
-                           .placement('bottom')
-                           .title(function(d) { return d.description; })
-                           .keys(function(d) { return [d.key]; })
-                           .scrollContainer(context.container().select('.top-toolbar'))
-                       );
+             if (err) {
+               return callback(err);
+             } // we get the updated note back, remove from caches and reparse..

 
 

-                   buttonsEnter
-                       .each(function(d) {
-                           select(this)
-                               .call(svgIcon('#iD-icon-' + d.button));
-                       });

 
 

-                   buttonsEnter
-                       .append('span')
-                       .attr('class', 'label')
-                       .text(function(mode) { return mode.title; });
+             this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag

 
 

-                   // if we are adding/removing the buttons, check if toolbar has overflowed
-                   if (buttons.enter().size() || buttons.exit().size()) {
-                       context.ui().checkOverflow('.top-toolbar', true);
-                   }
+             if (action === 'close') {
+               _noteCache.closed[note.id] = true;
+             } else if (action === 'reopen') {
+               delete _noteCache.closed[note.id];
+             }

 
 

-                   // update
-                   buttons = buttons
-                       .merge(buttonsEnter)
-                       .classed('disabled', function(d) { return !enabled(); })
-                       .classed('active', function(d) { return context.mode() && context.mode().button === d.button; });
+             var options = {
+               skipSeen: false
+             };
+             return parseXML(xml, function (err, results) {
+               if (err) {
+                 return callback(err);
+               } else {
+                 return callback(undefined, results[0]);

                }
                }

-           };
-
-           return tool;
-       }
+             }, options);
+           }
+         },
+         "switch": function _switch(options) {
+           urlroot = options.urlroot;
+           oauth.options(Object.assign({
+             url: urlroot,
+             loading: authLoading,
+             done: authDone
+           }, options));
+           this.reset();
+           this.userChangesets(function () {}); // eagerly load user details/changesets
+
+           dispatch$2.call('change');
+           return this;
+         },
+         toggle: function toggle(val) {
+           _off = !val;
+           return this;
+         },
+         isChangesetInflight: function isChangesetInflight() {
+           return !!_changeset.inflight;
+         },
+         // get/set cached data
+         // This is used to save/restore the state when entering/exiting the walkthrough
+         // Also used for testing purposes.
+         caches: function caches(obj) {
+           function cloneCache(source) {
+             var target = {};
+             Object.keys(source).forEach(function (k) {
+               if (k === 'rtree') {
+                 target.rtree = new RBush().fromJSON(source.rtree.toJSON()); // clone rbush
+               } else if (k === 'note') {
+                 target.note = {};
+                 Object.keys(source.note).forEach(function (id) {
+                   target.note[id] = osmNote(source.note[id]); // copy notes
+                 });
+               } else {
+                 target[k] = JSON.parse(JSON.stringify(source[k])); // clone deep
+               }
+             });
+             return target;
+           }

 
 

-       function uiToolNotes(context) {
+           if (!arguments.length) {
+             return {
+               tile: cloneCache(_tileCache),
+               note: cloneCache(_noteCache),
+               user: cloneCache(_userCache)
+             };
+           } // access caches directly for testing (e.g., loading notes rtree)

 
 

-           var tool = {
-               id: 'notes',
-               label: _t('modes.add_note.label')
-           };

 
 

-           var mode = modeAddNote(context);
+           if (obj === 'get') {
+             return {
+               tile: _tileCache,
+               note: _noteCache,
+               user: _userCache
+             };
+           }

 
 

-           function enabled() {
-               return notesEnabled() && notesEditable();
+           if (obj.tile) {
+             _tileCache = obj.tile;
+             _tileCache.inflight = {};

            }
 
            }
 

-           function notesEnabled() {
-               var noteLayer = context.layers().layer('notes');
-               return noteLayer && noteLayer.enabled();
+           if (obj.note) {
+             _noteCache = obj.note;
+             _noteCache.inflight = {};
+             _noteCache.inflightPost = {};

            }
 
            }
 

-           function notesEditable() {
-               var mode = context.mode();
-               return context.map().notesEditable() && mode && mode.id !== 'save';
+           if (obj.user) {
+             _userCache = obj.user;

            }
 
            }
 

-           context.keybinding().on(mode.key, function() {
-               if (!enabled()) { return; }
+           return this;
+         },
+         logout: function logout() {
+           _userChangesets = undefined;
+           _userDetails = undefined;
+           oauth.logout();
+           dispatch$2.call('change');
+           return this;
+         },
+         authenticated: function authenticated() {
+           return oauth.authenticated();
+         },
+         authenticate: function authenticate(callback) {
+           var that = this;
+           var cid = _connectionID;
+           _userChangesets = undefined;
+           _userDetails = undefined;

 
 

-               if (mode.id === context.mode().id) {
-                   context.enter(modeBrowse(context));
-               } else {
-                   context.enter(mode);
-               }
+           function done(err, res) {
+             if (err) {
+               if (callback) callback(err);
+               return;
+             }
+
+             if (that.getConnectionId() !== cid) {
+               if (callback) callback({
+                 message: 'Connection Switched',
+                 status: -1
+               });
+               return;
+             }
+
+             _rateLimitError = undefined;
+             dispatch$2.call('change');
+             if (callback) callback(err, res);
+             that.userChangesets(function () {}); // eagerly load user details/changesets
+           }
+
+           return oauth.authenticate(done);
+         },
+         imageryBlocklists: function imageryBlocklists() {
+           return _imageryBlocklists;
+         },
+         tileZoom: function tileZoom(val) {
+           if (!arguments.length) return _tileZoom;
+           _tileZoom = val;
+           return this;
+         },
+         // get all cached notes covering the viewport
+         notes: function notes(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           return _noteCache.rtree.search(bbox).map(function (d) {
+             return d.data;

            });
            });

+         },
+         // get a single note from the cache
+         getNote: function getNote(id) {
+           return _noteCache.note[id];
+         },
+         // remove a single note from the cache
+         removeNote: function removeNote(note) {
+           if (!(note instanceof osmNote) || !note.id) return;
+           delete _noteCache.note[note.id];
+           updateRtree(encodeNoteRtree(note), false); // false = remove
+         },
+         // replace a single note in the cache
+         replaceNote: function replaceNote(note) {
+           if (!(note instanceof osmNote) || !note.id) return;
+           _noteCache.note[note.id] = note;
+           updateRtree(encodeNoteRtree(note), true); // true = replace

 
 

-           tool.render = function(selection) {
+           return note;
+         },
+         // Get an array of note IDs closed during this session.
+         // Used to populate `closed:note` changeset tag
+         getClosedIDs: function getClosedIDs() {
+           return Object.keys(_noteCache.closed).sort();
+         }
+       };

 
 

+       var _apibase$1 = 'https://wiki.openstreetmap.org/w/api.php';
+       var _inflight$1 = {};
+       var _wikibaseCache = {};
+       var _localeIDs = {
+         en: false
+       };

 
 

-               var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
+       var debouncedRequest$1 = debounce(request$1, 500, {
+         leading: false
+       });

 
 

-               context.map()
-                   .on('move.notes', debouncedUpdate)
-                   .on('drawn.notes', debouncedUpdate);
+       function request$1(url, callback) {
+         if (_inflight$1[url]) return;
+         var controller = new AbortController();
+         _inflight$1[url] = controller;
+         d3_json(url, {
+           signal: controller.signal
+         }).then(function (result) {
+           delete _inflight$1[url];
+           if (callback) callback(null, result);
+         })["catch"](function (err) {
+           delete _inflight$1[url];
+           if (err.name === 'AbortError') return;
+           if (callback) callback(err.message);
+         });
+       }

 
 

-               context
-                   .on('enter.notes', update);
+       var serviceOsmWikibase = {
+         init: function init() {
+           _inflight$1 = {};
+           _wikibaseCache = {};
+           _localeIDs = {};
+         },
+         reset: function reset() {
+           Object.values(_inflight$1).forEach(function (controller) {
+             controller.abort();
+           });
+           _inflight$1 = {};
+         },

 
 

-               update();
+         /**
+          * Get the best value for the property, or undefined if not found
+          * @param entity object from wikibase
+          * @param property string e.g. 'P4' for image
+          * @param langCode string e.g. 'fr' for French
+          */
+         claimToValue: function claimToValue(entity, property, langCode) {
+           if (!entity.claims[property]) return undefined;
+           var locale = _localeIDs[langCode];
+           var preferredPick, localePick;
+           entity.claims[property].forEach(function (stmt) {
+             // If exists, use value limited to the needed language (has a qualifier P26 = locale)
+             // Or if not found, use the first value with the "preferred" rank
+             if (!preferredPick && stmt.rank === 'preferred') {
+               preferredPick = stmt;
+             }

 
 

+             if (locale && stmt.qualifiers && stmt.qualifiers.P26 && stmt.qualifiers.P26[0].datavalue.value.id === locale) {
+               localePick = stmt;
+             }
+           });
+           var result = localePick || preferredPick;

 
 

-               function update() {
-                   var showNotes = notesEnabled();
-                   var data = showNotes ? [mode] : [];
+           if (result) {
+             var datavalue = result.mainsnak.datavalue;
+             return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
+           } else {
+             return undefined;
+           }
+         },

 
 

-                   var buttons = selection.selectAll('button.add-button')
-                       .data(data, function(d) { return d.id; });
+         /**
+          * Convert monolingual property into a key-value object (language -> value)
+          * @param entity object from wikibase
+          * @param property string e.g. 'P31' for monolingual wiki page title
+          */
+         monolingualClaimToValueObj: function monolingualClaimToValueObj(entity, property) {
+           if (!entity || !entity.claims[property]) return undefined;
+           return entity.claims[property].reduce(function (acc, obj) {
+             var value = obj.mainsnak.datavalue.value;
+             acc[value.language] = value.text;
+             return acc;
+           }, {});
+         },
+         toSitelink: function toSitelink(key, value) {
+           var result = value ? 'Tag:' + key + '=' + value : 'Key:' + key;
+           return result.replace(/_/g, ' ').trim();
+         },
+         //
+         // Pass params object of the form:
+         // {
+         //   key: 'string',
+         //   value: 'string',
+         //   langCode: 'string'
+         // }
+         //
+         getEntity: function getEntity(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest$1 : request$1;
+           var that = this;
+           var titles = [];
+           var result = {};
+           var rtypeSitelink = params.key === 'type' && params.value ? ('Relation:' + params.value).replace(/_/g, ' ').trim() : false;
+           var keySitelink = params.key ? this.toSitelink(params.key) : false;
+           var tagSitelink = params.key && params.value ? this.toSitelink(params.key, params.value) : false;
+           var localeSitelink;
+
+           if (params.langCodes) {
+             params.langCodes.forEach(function (langCode) {
+               if (_localeIDs[langCode] === undefined) {
+                 // If this is the first time we are asking about this locale,
+                 // fetch corresponding entity (if it exists), and cache it.
+                 // If there is no such entry, cache `false` value to avoid re-requesting it.
+                 localeSitelink = ('Locale:' + langCode).replace(/_/g, ' ').trim();
+                 titles.push(localeSitelink);
+               }
+             });
+           }

 
 

-                   // exit
-                   buttons.exit()
-                       .remove();
+           if (rtypeSitelink) {
+             if (_wikibaseCache[rtypeSitelink]) {
+               result.rtype = _wikibaseCache[rtypeSitelink];
+             } else {
+               titles.push(rtypeSitelink);
+             }
+           }

 
 

-                   // enter
-                   var buttonsEnter = buttons.enter()
-                       .append('button')
-                       .attr('tabindex', -1)
-                       .attr('class', function(d) { return d.id + ' add-button bar-button'; })
-                       .on('click.notes', function(d) {
-                           if (!enabled()) { return; }
+           if (keySitelink) {
+             if (_wikibaseCache[keySitelink]) {
+               result.key = _wikibaseCache[keySitelink];
+             } else {
+               titles.push(keySitelink);
+             }
+           }

 
 

-                           // When drawing, ignore accidental clicks on mode buttons - #4042
-                           var currMode = context.mode().id;
-                           if (/^draw/.test(currMode)) { return; }
+           if (tagSitelink) {
+             if (_wikibaseCache[tagSitelink]) {
+               result.tag = _wikibaseCache[tagSitelink];
+             } else {
+               titles.push(tagSitelink);
+             }
+           }

 
 

-                           if (d.id === currMode) {
-                               context.enter(modeBrowse(context));
-                           } else {
-                               context.enter(d);
-                           }
-                       })
-                       .call(uiTooltip()
-                           .placement('bottom')
-                           .title(function(d) { return d.description; })
-                           .keys(function(d) { return [d.key]; })
-                           .scrollContainer(context.container().select('.top-toolbar'))
-                       );
+           if (!titles.length) {
+             // Nothing to do, we already had everything in the cache
+             return callback(null, result);
+           } // Requesting just the user language code
+           // If backend recognizes the code, it will perform proper fallbacks,
+           // and the result will contain the requested code. If not, all values are returned:
+           // {"zh-tw":{"value":"...","language":"zh-tw","source-language":"zh-hant"}
+           // {"pt-br":{"value":"...","language":"pt","for-language":"pt-br"}}

 
 

-                   buttonsEnter
-                       .each(function(d) {
-                           select(this)
-                               .call(svgIcon(d.icon || '#iD-icon-' + d.button));
-                       });

 
 

-                   // if we are adding/removing the buttons, check if toolbar has overflowed
-                   if (buttons.enter().size() || buttons.exit().size()) {
-                       context.ui().checkOverflow('.top-toolbar', true);
+           var obj = {
+             action: 'wbgetentities',
+             sites: 'wiki',
+             titles: titles.join('|'),
+             languages: params.langCodes.join('|'),
+             languagefallback: 1,
+             origin: '*',
+             format: 'json' // There is an MW Wikibase API bug https://phabricator.wikimedia.org/T212069
+             // We shouldn't use v1 until it gets fixed, but should switch to it afterwards
+             // formatversion: 2,
+
+           };
+           var url = _apibase$1 + '?' + utilQsString(obj);
+           doRequest(url, function (err, d) {
+             if (err) {
+               callback(err);
+             } else if (!d.success || d.error) {
+               callback(d.error.messages.map(function (v) {
+                 return v.html['*'];
+               }).join('<br>'));
+             } else {
+               var localeID = false;
+               Object.values(d.entities).forEach(function (res) {
+                 if (res.missing !== '') {
+                   var title = res.sitelinks.wiki.title;
+
+                   if (title === rtypeSitelink) {
+                     _wikibaseCache[rtypeSitelink] = res;
+                     result.rtype = res;
+                   } else if (title === keySitelink) {
+                     _wikibaseCache[keySitelink] = res;
+                     result.key = res;
+                   } else if (title === tagSitelink) {
+                     _wikibaseCache[tagSitelink] = res;
+                     result.tag = res;
+                   } else if (title === localeSitelink) {
+                     localeID = res.id;
+                   } else {
+                     console.log('Unexpected title ' + title); // eslint-disable-line no-console

                    }
                    }

+                 }
+               });

 
 

-                   // update
-                   buttons = buttons
-                       .merge(buttonsEnter)
-                       .classed('disabled', function(d) { return !enabled(); })
-                       .classed('active', function(d) { return context.mode() && context.mode().button === d.button; });
+               if (localeSitelink) {
+                 // If locale ID is not found, store false to prevent repeated queries
+                 that.addLocale(params.langCodes[0], localeID);

                }
                }

-           };

 
 

-           tool.uninstall = function() {
-               context
-                   .on('enter.editor.notes', null)
-                   .on('exit.editor.notes', null)
-                   .on('enter.notes', null);
+               callback(null, result);
+             }
+           });
+         },
+         //
+         // Pass params object of the form:
+         // {
+         //   key: 'string',     // required
+         //   value: 'string'    // optional
+         // }
+         //
+         // Get an result object used to display tag documentation
+         // {
+         //   title:        'string',
+         //   description:  'string',
+         //   editURL:      'string',
+         //   imageURL:     'string',
+         //   wiki:         { title: 'string', text: 'string', url: 'string' }
+         // }
+         //
+         getDocs: function getDocs(params, callback) {
+           var that = this;
+           var langCodes = _mainLocalizer.localeCodes().map(function (code) {
+             return code.toLowerCase();
+           });
+           params.langCodes = langCodes;
+           this.getEntity(params, function (err, data) {
+             if (err) {
+               callback(err);
+               return;
+             }

 
 

-               context.map()
-                   .on('move.notes', null)
-                   .on('drawn.notes', null);
-           };
+             var entity = data.rtype || data.tag || data.key;

 
 

-           return tool;
-       }
+             if (!entity) {
+               callback('No entity');
+               return;
+             }

 
 

-       function uiToolSave(context) {
+             var i;
+             var description;

 
 

-           var tool = {
-               id: 'save',
-               label: _t('save.title')
-           };
+             for (i in langCodes) {
+               var _code = langCodes[i];

 
 

-           var button = null;
-           var tooltipBehavior = null;
-           var history = context.history();
-           var key = uiCmd('⌘S');
-           var _numChanges = 0;
+               if (entity.descriptions[_code] && entity.descriptions[_code].language === _code) {
+                 description = entity.descriptions[_code];
+                 break;
+               }
+             }

 
 

-           function isSaving() {
-               var mode = context.mode();
-               return mode && mode.id === 'save';
-           }
+             if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result

 
 

-           function isDisabled() {
-               return _numChanges === 0 || isSaving();
-           }
+             var result = {
+               title: entity.title,
+               description: description ? description.value : '',
+               descriptionLocaleCode: description ? description.language : '',
+               editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
+             }; // add image
+
+             if (entity.claims) {
+               var imageroot;
+               var image = that.claimToValue(entity, 'P4', langCodes[0]);
+
+               if (image) {
+                 imageroot = 'https://commons.wikimedia.org/w/index.php';
+               } else {
+                 image = that.claimToValue(entity, 'P28', langCodes[0]);

 
 

-           function save() {
-               event.preventDefault();
-               if (!context.inIntro() && !isSaving() && history.hasChanges()) {
-                   context.enter(modeSave(context));
+                 if (image) {
+                   imageroot = 'https://wiki.openstreetmap.org/w/index.php';
+                 }

                }
                }

-           }

 
 

-           function bgColor() {
-               var step;
-               if (_numChanges === 0) {
-                   return null;
-               } else if (_numChanges <= 50) {
-                   step = _numChanges / 50;
-                   return d3_interpolateRgb('#fff', '#ff8')(step);  // white -> yellow
-               } else {
-                   step = Math.min((_numChanges - 50) / 50, 1.0);
-                   return d3_interpolateRgb('#ff8', '#f88')(step);  // yellow -> red
+               if (imageroot && image) {
+                 result.imageURL = imageroot + '?' + utilQsString({
+                   title: 'Special:Redirect/file/' + image,
+                   width: 400
+                 });

                }
                }

-           }
+             } // Try to get a wiki page from tag data item first, followed by the corresponding key data item.
+             // If neither tag nor key data item contain a wiki page in the needed language nor English,
+             // get the first found wiki page from either the tag or the key item.

 
 

-           function updateCount() {
-               var val = history.difference().summary().length;
-               if (val === _numChanges) { return; }

 
 

-               _numChanges = val;
+             var rtypeWiki = that.monolingualClaimToValueObj(data.rtype, 'P31');
+             var tagWiki = that.monolingualClaimToValueObj(data.tag, 'P31');
+             var keyWiki = that.monolingualClaimToValueObj(data.key, 'P31');
+             var wikis = [rtypeWiki, tagWiki, keyWiki];

 
 

-               if (tooltipBehavior) {
-                   tooltipBehavior
-                       .title(_t(_numChanges > 0 ? 'save.help' : 'save.no_changes'))
-                       .keys([key]);
-               }
+             for (i in wikis) {
+               var wiki = wikis[i];

 
 

-               if (button) {
-                   button
-                       .classed('disabled', isDisabled())
-                       .style('background', bgColor());
+               for (var j in langCodes) {
+                 var code = langCodes[j];
+                 var referenceId = langCodes[0].split('-')[0] !== 'en' && code.split('-')[0] === 'en' ? 'inspector.wiki_en_reference' : 'inspector.wiki_reference';
+                 var info = getWikiInfo(wiki, code, referenceId);

 
 

-                   button.select('span.count')
-                       .text(_numChanges);
+                 if (info) {
+                   result.wiki = info;
+                   break;
+                 }

                }
                }

-           }
-
-
-           tool.render = function(selection) {
-               tooltipBehavior = uiTooltip()
-                   .placement('bottom')
-                   .title(_t('save.no_changes'))
-                   .keys([key])
-                   .scrollContainer(context.container().select('.top-toolbar'));

 
 

-               var lastPointerUpType;
+               if (result.wiki) break;
+             }

 
 

-               button = selection
-                   .append('button')
-                   .attr('class', 'save disabled bar-button')
-                   .on('pointerup', function() {
-                       lastPointerUpType = event.pointerType;
-                   })
-                   .on('click', function() {
-                       event.preventDefault();
+             callback(null, result); // Helper method to get wiki info if a given language exists

 
 

-                       save();
+             function getWikiInfo(wiki, langCode, tKey) {
+               if (wiki && wiki[langCode]) {
+                 return {
+                   title: wiki[langCode],
+                   text: tKey,
+                   url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
+                 };
+               }
+             }
+           });
+         },
+         addLocale: function addLocale(langCode, qid) {
+           // Makes it easier to unit test
+           _localeIDs[langCode] = qid;
+         },
+         apibase: function apibase(val) {
+           if (!arguments.length) return _apibase$1;
+           _apibase$1 = val;
+           return this;
+         }
+       };

 
 

-                       if (_numChanges === 0 && (
-                           lastPointerUpType === 'touch' ||
-                           lastPointerUpType === 'pen')
-                       ) {
-                           // there are no tooltips for touch interactions so flash feedback instead
-                           context.ui().flash
-                               .duration(2000)
-                               .iconName('#iD-icon-save')
-                               .iconClass('disabled')
-                               .text(_t('save.no_changes'))();
-                       }
-                       lastPointerUpType = null;
-                   })
-                   .call(tooltipBehavior);
+       var jsonpCache = {};
+       window.jsonpCache = jsonpCache;
+       function jsonpRequest(url, callback) {
+         var request = {
+           abort: function abort() {}
+         };

 
 

-               button
-                   .call(svgIcon('#iD-icon-save'));
+         if (window.JSONP_FIX) {
+           if (window.JSONP_DELAY === 0) {
+             callback(window.JSONP_FIX);
+           } else {
+             var t = window.setTimeout(function () {
+               callback(window.JSONP_FIX);
+             }, window.JSONP_DELAY || 0);

 
 

-               button
-                   .append('span')
-                   .attr('class', 'count')
-                   .attr('aria-hidden', 'true')
-                   .text('0');
+             request.abort = function () {
+               window.clearTimeout(t);
+             };
+           }

 
 

-               updateCount();
+           return request;
+         }

 
 

+         function rand() {
+           var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
+           var c = '';
+           var i = -1;

 
 

-               context.keybinding()
-                   .on(key, save, true);
+           while (++i < 15) {
+             c += chars.charAt(Math.floor(Math.random() * 52));
+           }

 
 

+           return c;
+         }

 
 

-               context.history()
-                   .on('change.save', updateCount);
+         function create(url) {
+           var e = url.match(/callback=(\w+)/);
+           var c = e ? e[1] : rand();

 
 

-               context
-                   .on('enter.save', function() {
-                       if (button) {
-                           button
-                               .classed('disabled', isDisabled());
+           jsonpCache[c] = function (data) {
+             if (jsonpCache[c]) {
+               callback(data);
+             }

 
 

-                           if (isSaving()) {
-                               button.call(tooltipBehavior.hide);
-                           }
-                       }
-                   });
+             finalize();

            };
 
            };
 

+           function finalize() {
+             delete jsonpCache[c];
+             script.remove();
+           }
+
+           request.abort = finalize;
+           return 'jsonpCache.' + c;
+         }

 
 

-           tool.uninstall = function() {
-               context.keybinding()
-                   .off(key, true);
+         var cb = create(url);
+         var script = select('head').append('script').attr('type', 'text/javascript').attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
+         return request;
+       }

 
 

-               context.history()
-                   .on('change.save', null);
+       var bubbleApi = 'https://dev.virtualearth.net/mapcontrol/HumanScaleServices/GetBubbles.ashx?';
+       var streetsideImagesApi = 'https://t.ssl.ak.tiles.virtualearth.net/tiles/';
+       var bubbleAppKey = 'AuftgJsO0Xs8Ts4M1xZUQJQXJNsvmh3IV8DkNieCiy3tCwCUMq76-WpkrBtNAuEm';
+       var pannellumViewerCSS = 'pannellum-streetside/pannellum.css';
+       var pannellumViewerJS = 'pannellum-streetside/pannellum.js';
+       var maxResults = 2000;
+       var tileZoom = 16.5;
+       var tiler$1 = utilTiler().zoomExtent([tileZoom, tileZoom]).skipNullIsland(true);
+       var dispatch$1 = dispatch$8('loadedImages', 'viewerChanged');
+       var minHfov = 10; // zoom in degrees:  20, 10, 5

 
 

-               context
-                   .on('enter.save', null);
+       var maxHfov = 90; // zoom out degrees

 
 

-               button = null;
-               tooltipBehavior = null;
-           };
+       var defaultHfov = 45;
+       var _hires = false;
+       var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096

 
 

-           return tool;
-       }
+       var _currScene = 0;

 
 

-       function uiToolSidebarToggle(context) {
+       var _ssCache;

 
 

-           var tool = {
-               id: 'sidebar_toggle',
-               label: _t('toolbar.inspect')
-           };
+       var _pannellumViewer;

 
 

-           tool.render = function(selection) {
-               selection
-                   .append('button')
-                   .attr('class', 'bar-button')
-                   .on('click', function() {
-                       context.ui().sidebar.toggle();
-                   })
-                   .call(uiTooltip()
-                       .placement('bottom')
-                       .title(_t('sidebar.tooltip'))
-                       .keys([_t('sidebar.key')])
-                       .scrollContainer(context.container().select('.top-toolbar'))
-                   )
-                   .call(svgIcon('#iD-icon-sidebar-' + (_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')));
-           };
+       var _sceneOptions = {
+         showFullscreenCtrl: false,
+         autoLoad: true,
+         compass: true,
+         yaw: 0,
+         minHfov: minHfov,
+         maxHfov: maxHfov,
+         hfov: defaultHfov,
+         type: 'cubemap',
+         cubeMap: []
+       };

 
 

-           return tool;
-       }
+       var _loadViewerPromise;
+       /**
+        * abortRequest().
+        */

 
 

-       function uiToolUndoRedo(context) {

 
 

-           var tool = {
-               id: 'undo_redo',
-               label: _t('toolbar.undo_redo')
-           };
+       function abortRequest$1(i) {
+         i.abort();
+       }
+       /**
+        * localeTimeStamp().
+        */

 
 

-           var commands = [{
-               id: 'undo',
-               cmd: uiCmd('⌘Z'),
-               action: function() {
-                   context.undo();
-               },
-               annotation: function() {
-                   return context.history().undoAnnotation();
-               },
-               icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')
-           }, {
-               id: 'redo',
-               cmd: uiCmd('⌘⇧Z'),
-               action: function() {
-                   context.redo();
-               },
-               annotation: function() {
-                   return context.history().redoAnnotation();
-               },
-               icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'undo' : 'redo')
-           }];

 
 

+       function localeTimestamp(s) {
+         if (!s) return null;
+         var options = {
+           day: 'numeric',
+           month: 'short',
+           year: 'numeric'
+         };
+         var d = new Date(s);
+         if (isNaN(d.getTime())) return null;
+         return d.toLocaleString(_mainLocalizer.localeCode(), options);
+       }
+       /**
+        * loadTiles() wraps the process of generating tiles and then fetching image points for each tile.
+        */

 
 

-           function editable() {
-               return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true /* ignore min zoom */);
-           }

 
 

+       function loadTiles(which, url, projection, margin) {
+         var tiles = tiler$1.margin(margin).getTiles(projection); // abort inflight requests that are no longer needed

 
 

-           tool.render = function(selection) {
-               var tooltipBehavior = uiTooltip()
-                   .placement('bottom')
-                   .title(function (d) {
-                       return d.annotation() ?
-                           _t(d.id + '.tooltip', { action: d.annotation() }) :
-                           _t(d.id + '.nothing');
-                   })
-                   .keys(function(d) {
-                       return [d.cmd];
-                   })
-                   .scrollContainer(context.container().select('.top-toolbar'));
+         var cache = _ssCache[which];
+         Object.keys(cache.inflight).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k.indexOf(tile.id + ',') === 0;
+           });

 
 

-               var lastPointerUpType;
+           if (!wanted) {
+             abortRequest$1(cache.inflight[k]);
+             delete cache.inflight[k];
+           }
+         });
+         tiles.forEach(function (tile) {
+           return loadNextTilePage(which, url, tile);
+         });
+       }
+       /**
+        * loadNextTilePage() load data for the next tile page in line.
+        */

 
 

-               var buttons = selection.selectAll('button')
-                   .data(commands)
-                   .enter()
-                   .append('button')
-                   .attr('class', function(d) { return 'disabled ' + d.id + '-button bar-button'; })
-                   .on('pointerup', function() {
-                       // `pointerup` is always called before `click`
-                       lastPointerUpType = event.pointerType;
-                   })
-                   .on('click', function(d) {
-                       event.preventDefault();
-
-                       var annotation = d.annotation();
-
-                       if (editable() && annotation) {
-                           d.action();
-                       }

 
 

-                       if (editable() && (
-                           lastPointerUpType === 'touch' ||
-                           lastPointerUpType === 'pen')
-                       ) {
-                           // there are no tooltips for touch interactions so flash feedback instead
-
-                           var text = annotation ?
-                               _t(d.id + '.tooltip', { action: annotation }) :
-                               _t(d.id + '.nothing');
-                           context.ui().flash
-                               .duration(2000)
-                               .iconName('#' + d.icon)
-                               .iconClass(annotation ? '' : 'disabled')
-                               .text(text)();
-                       }
-                       lastPointerUpType = null;
-                   })
-                   .call(tooltipBehavior);
+       function loadNextTilePage(which, url, tile) {
+         var cache = _ssCache[which];
+         var nextPage = cache.nextPage[tile.id] || 0;
+         var id = tile.id + ',' + String(nextPage);
+         if (cache.loaded[id] || cache.inflight[id]) return;
+         cache.inflight[id] = getBubbles(url, tile, function (bubbles) {
+           cache.loaded[id] = true;
+           delete cache.inflight[id];
+           if (!bubbles) return; // [].shift() removes the first element, some statistics info, not a bubble point

 
 

-               buttons.each(function(d) {
-                   select(this)
-                       .call(svgIcon('#' + d.icon));
-               });
+           bubbles.shift();
+           var features = bubbles.map(function (bubble) {
+             if (cache.points[bubble.id]) return null; // skip duplicates

 
 

-               context.keybinding()
-                   .on(commands[0].cmd, function() {
-                       event.preventDefault();
-                       if (editable()) { commands[0].action(); }
-                   })
-                   .on(commands[1].cmd, function() {
-                       event.preventDefault();
-                       if (editable()) { commands[1].action(); }
-                   });
+             var loc = [bubble.lo, bubble.la];
+             var d = {
+               loc: loc,
+               key: bubble.id,
+               ca: bubble.he,
+               captured_at: bubble.cd,
+               captured_by: 'microsoft',
+               // nbn: bubble.nbn,
+               // pbn: bubble.pbn,
+               // ad: bubble.ad,
+               // rn: bubble.rn,
+               pr: bubble.pr,
+               // previous
+               ne: bubble.ne,
+               // next
+               pano: true,
+               sequenceKey: null
+             };
+             cache.points[bubble.id] = d; // a sequence starts here

 
 

+             if (bubble.pr === undefined) {
+               cache.leaders.push(bubble.id);
+             }

 
 

-               var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
+             return {
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
+             };
+           }).filter(Boolean);
+           cache.rtree.load(features);
+           connectSequences();

 
 

-               context.map()
-                   .on('move.undo_redo', debouncedUpdate)
-                   .on('drawn.undo_redo', debouncedUpdate);
+           if (which === 'bubbles') {
+             dispatch$1.call('loadedImages');
+           }
+         });
+       } // call this sometimes to connect the bubbles into sequences

 
 

-               context.history()
-                   .on('change.undo_redo', function(difference) {
-                       if (difference) { update(); }
-                   });

 
 

-               context
-                   .on('enter.undo_redo', update);
+       function connectSequences() {
+         var cache = _ssCache.bubbles;
+         var keepLeaders = [];

 
 

+         for (var i = 0; i < cache.leaders.length; i++) {
+           var bubble = cache.points[cache.leaders[i]];
+           var seen = {}; // try to make a sequence.. use the key of the leader bubble.

 
 

-               function update() {
-                   buttons
-                       .classed('disabled', function(d) {
-                           return !editable() || !d.annotation();
-                       })
-                       .each(function() {
-                           var selection = select(this);
-                           if (!selection.select('.tooltip.in').empty()) {
-                               selection.call(tooltipBehavior.updateContent);
-                           }
-                       });
-               }
+           var sequence = {
+             key: bubble.key,
+             bubbles: []

            };
            };

+           var complete = false;

 
 

-           tool.uninstall = function() {
-               context.keybinding()
-                   .off(commands[0].cmd)
-                   .off(commands[1].cmd);
+           do {
+             sequence.bubbles.push(bubble);
+             seen[bubble.key] = true;

 
 

-               context.map()
-                   .on('move.undo_redo', null)
-                   .on('drawn.undo_redo', null);
+             if (bubble.ne === undefined) {
+               complete = true;
+             } else {
+               bubble = cache.points[bubble.ne]; // advance to next
+             }
+           } while (bubble && !seen[bubble.key] && !complete);

 
 

-               context.history()
-                   .on('change.undo_redo', null);
+           if (complete) {
+             _ssCache.sequences[sequence.key] = sequence; // assign bubbles to the sequence

 
 

-               context
-                   .on('enter.undo_redo', null);
-           };
+             for (var j = 0; j < sequence.bubbles.length; j++) {
+               sequence.bubbles[j].sequenceKey = sequence.key;
+             } // create a GeoJSON LineString

 
 

-           return tool;
-       }

 
 

-       function uiTopToolbar(context) {
+             sequence.geojson = {
+               type: 'LineString',
+               properties: {
+                 captured_at: sequence.bubbles[0] ? sequence.bubbles[0].captured_at : null,
+                 captured_by: sequence.bubbles[0] ? sequence.bubbles[0].captured_by : null,
+                 key: sequence.key
+               },
+               coordinates: sequence.bubbles.map(function (d) {
+                 return d.loc;
+               })
+             };
+           } else {
+             keepLeaders.push(cache.leaders[i]);
+           }
+         } // couldn't complete these, save for later

 
 

-           var sidebarToggle = uiToolSidebarToggle(context),
-               modes = uiToolOldDrawModes(context),
-               notes = uiToolNotes(context),
-               undoRedo = uiToolUndoRedo(context),
-               save = uiToolSave(context);

 
 

-           function notesEnabled() {
-               var noteLayer = context.layers().layer('notes');
-               return noteLayer && noteLayer.enabled();
-           }
+         cache.leaders = keepLeaders;
+       }
+       /**
+        * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
+        */

 
 

-           function topToolbar(bar) {

 
 

-               bar.on('wheel.topToolbar', function() {
-                   if (!event.deltaX) {
-                       // translate vertical scrolling into horizontal scrolling in case
-                       // the user doesn't have an input device that can scroll horizontally
-                       bar.node().scrollLeft += event.deltaY;
-                   }
-               });
+       function getBubbles(url, tile, callback) {
+         var rect = tile.extent.rectangle();
+         var urlForRequest = url + utilQsString({
+           n: rect[3],
+           s: rect[1],
+           e: rect[2],
+           w: rect[0],
+           c: maxResults,
+           appkey: bubbleAppKey,
+           jsCallback: '{callback}'
+         });
+         return jsonpRequest(urlForRequest, function (data) {
+           if (!data || data.error) {
+             callback(null);
+           } else {
+             callback(data);
+           }
+         });
+       } // partition viewport into higher zoom tiles

 
 

-               var debouncedUpdate = debounce(update, 500, { leading: true, trailing: true });
-               context.layers()
-                   .on('change.topToolbar', debouncedUpdate);

 
 

-               update();
+       function partitionViewport(projection) {
+         var z = geoScaleToZoom(projection.scale());
+         var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5

 
 

-               function update() {
+         var tiler = utilTiler().zoomExtent([z2, z2]);
+         return tiler.getTiles(projection).map(function (tile) {
+           return tile.extent;
+         });
+       } // no more than `limit` results per partition.

 
 

-                   var tools = [
-                       sidebarToggle,
-                       'spacer',
-                       modes
-                   ];

 
 

-                   tools.push('spacer');
+       function searchLimited(limit, projection, rtree) {
+         limit = limit || 5;
+         return partitionViewport(projection).reduce(function (result, extent) {
+           var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+             return d.data;
+           });
+           return found.length ? result.concat(found) : result;
+         }, []);
+       }
+       /**
+        * loadImage()
+        */

 
 

-                   if (notesEnabled()) {
-                       tools = tools.concat([notes, 'spacer']);
-                   }

 
 

-                   tools = tools.concat([undoRedo, save]);
+       function loadImage(imgInfo) {
+         return new Promise(function (resolve) {
+           var img = new Image();

 
 

-                   var toolbarItems = bar.selectAll('.toolbar-item')
-                       .data(tools, function(d) {
-                           return d.id || d;
-                       });
+           img.onload = function () {
+             var canvas = document.getElementById('ideditor-canvas' + imgInfo.face);
+             var ctx = canvas.getContext('2d');
+             ctx.drawImage(img, imgInfo.x, imgInfo.y);
+             resolve({
+               imgInfo: imgInfo,
+               status: 'ok'
+             });
+           };

 
 

-                   toolbarItems.exit()
-                       .each(function(d) {
-                           if (d.uninstall) {
-                               d.uninstall();
-                           }
-                       })
-                       .remove();
-
-                   var itemsEnter = toolbarItems
-                       .enter()
-                       .append('div')
-                       .attr('class', function(d) {
-                           var classes = 'toolbar-item ' + (d.id || d).replace('_', '-');
-                           if (d.klass) { classes += ' ' + d.klass; }
-                           return classes;
-                       });
+           img.onerror = function () {
+             resolve({
+               data: imgInfo,
+               status: 'error'
+             });
+           };

 
 

-                   var actionableItems = itemsEnter.filter(function(d) { return d !== 'spacer'; });
+           img.setAttribute('crossorigin', '');
+           img.src = imgInfo.url;
+         });
+       }
+       /**
+        * loadCanvas()
+        */

 
 

-                   actionableItems
-                       .append('div')
-                       .attr('class', 'item-content')
-                       .each(function(d) {
-                           select(this).call(d.render, bar);
-                       });

 
 

-                   actionableItems
-                       .append('div')
-                       .attr('class', 'item-label')
-                       .text(function(d) {
-                           return d.label;
-                       });
-               }
+       function loadCanvas(imageGroup) {
+         return Promise.all(imageGroup.map(loadImage)).then(function (data) {
+           var canvas = document.getElementById('ideditor-canvas' + data[0].imgInfo.face);
+           var which = {
+             '01': 0,
+             '02': 1,
+             '03': 2,
+             '10': 3,
+             '11': 4,
+             '12': 5
+           };
+           var face = data[0].imgInfo.face;
+           _sceneOptions.cubeMap[which[face]] = canvas.toDataURL('image/jpeg', 1.0);
+           return {
+             status: 'loadCanvas for face ' + data[0].imgInfo.face + 'ok'
+           };
+         });
+       }
+       /**
+        * loadFaces()
+        */

 
 

-           }

 
 

-           return topToolbar;
+       function loadFaces(faceGroup) {
+         return Promise.all(faceGroup.map(loadCanvas)).then(function () {
+           return {
+             status: 'loadFaces done'
+           };
+         });

        }
 
        }
 

-       // these are module variables so they are preserved through a ui.restart()
-       var sawVersion = null;
-       var isNewVersion = false;
-       var isNewUser = false;
+       function setupCanvas(selection, reset) {
+         if (reset) {
+           selection.selectAll('#ideditor-stitcher-canvases').remove();
+         } // Add the Streetside working canvases. These are used for 'stitching', or combining,
+         // multiple images for each of the six faces, before passing to the Pannellum control as DataUrls

 
 
 
 

-       function uiVersion(context) {
+         selection.selectAll('#ideditor-stitcher-canvases').data([0]).enter().append('div').attr('id', 'ideditor-stitcher-canvases').attr('display', 'none').selectAll('canvas').data(['canvas01', 'canvas02', 'canvas03', 'canvas10', 'canvas11', 'canvas12']).enter().append('canvas').attr('id', function (d) {
+           return 'ideditor-' + d;
+         }).attr('width', _resolution).attr('height', _resolution);
+       }

 
 

-           var currVersion = context.version;
-           var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);
+       function qkToXY(qk) {
+         var x = 0;
+         var y = 0;
+         var scale = 256;

 
 

-           if (sawVersion === null && matchedVersion !== null) {
-               if (corePreferences('sawVersion')) {
-                   isNewUser = false;
-                   isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
-               } else {
-                   isNewUser = true;
-                   isNewVersion = true;
-               }
-               corePreferences('sawVersion', currVersion);
-               sawVersion = currVersion;
-           }
-
-           return function(selection) {
-               selection
-                   .append('a')
-                   .attr('target', '_blank')
-                   .attr('href', 'https://github.com/openstreetmap/iD')
-                   .text(currVersion);
-
-               // only show new version indicator to users that have used iD before
-               if (isNewVersion && !isNewUser) {
-                   selection
-                       .append('div')
-                       .attr('class', 'badge')
-                       .append('a')
-                       .attr('target', '_blank')
-                       .attr('href', 'https://github.com/openstreetmap/iD/blob/release/CHANGELOG.md#whats-new')
-                       .call(svgIcon('#maki-gift-11'))
-                       .call(uiTooltip()
-                           .title(_t('version.whats_new', { version: currVersion }))
-                           .placement('top')
-                       );
-               }
-           };
+         for (var i = qk.length; i > 0; i--) {
+           var key = qk[i - 1];
+           x += +(key === '1' || key === '3') * scale;
+           y += +(key === '2' || key === '3') * scale;
+           scale *= 2;
+         }
+
+         return [x, y];

        }
 
        }
 

-       function uiZoom(context) {
+       function getQuadKeys() {
+         var dim = _resolution / 256;
+         var quadKeys;

 
 

-           var zooms = [{
-               id: 'zoom-in',
-               icon: 'iD-icon-plus',
-               title: _t('zoom.in'),
-               action: zoomIn,
-               disabled: function() {
-                   return !context.map().canZoomIn();
-               },
-               disabledTitle: _t('zoom.disabled.in'),
-               key: '+'
-           }, {
-               id: 'zoom-out',
-               icon: 'iD-icon-minus',
-               title: _t('zoom.out'),
-               action: zoomOut,
-               disabled: function() {
-                   return !context.map().canZoomOut();
-               },
-               disabledTitle: _t('zoom.disabled.out'),
-               key: '-'
-           }];
+         if (dim === 16) {
+           quadKeys = ['0000', '0001', '0010', '0011', '0100', '0101', '0110', '0111', '1000', '1001', '1010', '1011', '1100', '1101', '1110', '1111', '0002', '0003', '0012', '0013', '0102', '0103', '0112', '0113', '1002', '1003', '1012', '1013', '1102', '1103', '1112', '1113', '0020', '0021', '0030', '0031', '0120', '0121', '0130', '0131', '1020', '1021', '1030', '1031', '1120', '1121', '1130', '1131', '0022', '0023', '0032', '0033', '0122', '0123', '0132', '0133', '1022', '1023', '1032', '1033', '1122', '1123', '1132', '1133', '0200', '0201', '0210', '0211', '0300', '0301', '0310', '0311', '1200', '1201', '1210', '1211', '1300', '1301', '1310', '1311', '0202', '0203', '0212', '0213', '0302', '0303', '0312', '0313', '1202', '1203', '1212', '1213', '1302', '1303', '1312', '1313', '0220', '0221', '0230', '0231', '0320', '0321', '0330', '0331', '1220', '1221', '1230', '1231', '1320', '1321', '1330', '1331', '0222', '0223', '0232', '0233', '0322', '0323', '0332', '0333', '1222', '1223', '1232', '1233', '1322', '1323', '1332', '1333', '2000', '2001', '2010', '2011', '2100', '2101', '2110', '2111', '3000', '3001', '3010', '3011', '3100', '3101', '3110', '3111', '2002', '2003', '2012', '2013', '2102', '2103', '2112', '2113', '3002', '3003', '3012', '3013', '3102', '3103', '3112', '3113', '2020', '2021', '2030', '2031', '2120', '2121', '2130', '2131', '3020', '3021', '3030', '3031', '3120', '3121', '3130', '3131', '2022', '2023', '2032', '2033', '2122', '2123', '2132', '2133', '3022', '3023', '3032', '3033', '3122', '3123', '3132', '3133', '2200', '2201', '2210', '2211', '2300', '2301', '2310', '2311', '3200', '3201', '3210', '3211', '3300', '3301', '3310', '3311', '2202', '2203', '2212', '2213', '2302', '2303', '2312', '2313', '3202', '3203', '3212', '3213', '3302', '3303', '3312', '3313', '2220', '2221', '2230', '2231', '2320', '2321', '2330', '2331', '3220', '3221', '3230', '3231', '3320', '3321', '3330', '3331', '2222', '2223', '2232', '2233', '2322', '2323', '2332', '2333', '3222', '3223', '3232', '3233', '3322', '3323', '3332', '3333'];
+         } else if (dim === 8) {
+           quadKeys = ['000', '001', '010', '011', '100', '101', '110', '111', '002', '003', '012', '013', '102', '103', '112', '113', '020', '021', '030', '031', '120', '121', '130', '131', '022', '023', '032', '033', '122', '123', '132', '133', '200', '201', '210', '211', '300', '301', '310', '311', '202', '203', '212', '213', '302', '303', '312', '313', '220', '221', '230', '231', '320', '321', '330', '331', '222', '223', '232', '233', '322', '323', '332', '333'];
+         } else if (dim === 4) {
+           quadKeys = ['00', '01', '10', '11', '02', '03', '12', '13', '20', '21', '30', '31', '22', '23', '32', '33'];
+         } else {
+           // dim === 2
+           quadKeys = ['0', '1', '2', '3'];
+         }

 
 

-           function zoomIn() {
-               event.preventDefault();
-               context.map().zoomIn();
-           }
+         return quadKeys;
+       }

 
 

-           function zoomOut() {
-               event.preventDefault();
-               context.map().zoomOut();
+       var serviceStreetside = {
+         /**
+          * init() initialize streetside.
+          */
+         init: function init() {
+           if (!_ssCache) {
+             this.reset();

            }
 
            }
 

-           function zoomInFurther() {
-               event.preventDefault();
-               context.map().zoomInFurther();
-           }
+           this.event = utilRebind(this, dispatch$1, 'on');
+         },

 
 

-           function zoomOutFurther() {
-               event.preventDefault();
-               context.map().zoomOutFurther();
+         /**
+          * reset() reset the cache.
+          */
+         reset: function reset() {
+           if (_ssCache) {
+             Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$1);

            }
 
            }
 

-           return function(selection) {
-               var tooltipBehavior = uiTooltip()
-                   .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-                   .title(function(d) {
-                       if (d.disabled()) {
-                           return d.disabledTitle;
-                       }
-                       return d.title;
-                   })
-                   .keys(function(d) {
-                       return [d.key];
-                   });
-
-               var lastPointerUpType;
+           _ssCache = {
+             bubbles: {
+               inflight: {},
+               loaded: {},
+               nextPage: {},
+               rtree: new RBush(),
+               points: {},
+               leaders: []
+             },
+             sequences: {}
+           };
+         },

 
 

-               var buttons = selection.selectAll('button')
-                   .data(zooms)
-                   .enter()
-                   .append('button')
-                   .attr('class', function(d) { return d.id; })
-                   .on('pointerup.editor', function() {
-                       lastPointerUpType = event.pointerType;
-                   })
-                   .on('click.editor', function(d) {
-                       if (!d.disabled()) {
-                           d.action();
-                       } else if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
-                           context.ui().flash
-                               .duration(2000)
-                               .iconName('#' + d.icon)
-                               .iconClass('disabled')
-                               .text(d.disabledTitle)();
-                       }
-                       lastPointerUpType = null;
-                   })
-                   .call(tooltipBehavior);
+         /**
+          * bubbles()
+          */
+         bubbles: function bubbles(projection) {
+           var limit = 5;
+           return searchLimited(limit, projection, _ssCache.bubbles.rtree);
+         },
+         cachedImage: function cachedImage(imageKey) {
+           return _ssCache.bubbles.points[imageKey];
+         },
+         sequences: function sequences(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           var seen = {};
+           var results = []; // all sequences for bubbles in viewport

 
 

-               buttons.each(function(d) {
-                   select(this)
-                       .call(svgIcon('#' + d.icon, 'light'));
-               });
+           _ssCache.bubbles.rtree.search(bbox).forEach(function (d) {
+             var key = d.data.sequenceKey;

 
 

-               ['plus', 'ffplus', '=', 'ffequals'].forEach(function(key) {
-                   context.keybinding().on([key], zoomIn);
-                   context.keybinding().on([uiCmd('⌘' + key)], zoomInFurther);
-               });
+             if (key && !seen[key]) {
+               seen[key] = true;
+               results.push(_ssCache.sequences[key].geojson);
+             }
+           });

 
 

-               ['_', '-', 'ffminus', 'dash'].forEach(function(key) {
-                   context.keybinding().on([key], zoomOut);
-                   context.keybinding().on([uiCmd('⌘' + key)], zoomOutFurther);
-               });
+           return results;
+         },

 
 

-               function updateButtonStates() {
-                   buttons
-                       .classed('disabled', function(d) {
-                           return d.disabled();
-                       })
-                       .each(function() {
-                           var selection = select(this);
-                           if (!selection.select('.tooltip.in').empty()) {
-                               selection.call(tooltipBehavior.updateContent);
-                           }
-                       });
-               }
+         /**
+          * loadBubbles()
+          */
+         loadBubbles: function loadBubbles(projection, margin) {
+           // by default: request 2 nearby tiles so we can connect sequences.
+           if (margin === undefined) margin = 2;
+           loadTiles('bubbles', bubbleApi, projection, margin);
+         },
+         viewer: function viewer() {
+           return _pannellumViewer;
+         },
+         initViewer: function initViewer() {
+           if (!window.pannellum) return;
+           if (_pannellumViewer) return;
+           _currScene += 1;

 
 

-               updateButtonStates();
+           var sceneID = _currScene.toString();

 
 

-               context.map().on('move.uiZoom', updateButtonStates);
+           var options = {
+             'default': {
+               firstScene: sceneID
+             },
+             scenes: {}

            };
            };

-       }
-
-       function uiZoomToSelection(context) {
+           options.scenes[sceneID] = _sceneOptions;
+           _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
+         },
+         ensureViewerLoaded: function ensureViewerLoaded(context) {
+           if (_loadViewerPromise) return _loadViewerPromise; // create ms-wrapper, a photo wrapper class

 
 

-           function isDisabled() {
-               var mode = context.mode();
-               return !mode || !mode.zoomToSelected;
-           }
+           var wrap = context.container().select('.photoviewer').selectAll('.ms-wrapper').data([0]); // inject ms-wrapper into the photoviewer div
+           // (used by all to house each custom photo viewer)

 
 

-           var _lastPointerUpType;
+           var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper ms-wrapper').classed('hide', true);
+           var that = this;
+           var pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // inject div to support streetside viewer (pannellum) and attribution line

 
 

-           function pointerup() {
-               _lastPointerUpType = event.pointerType;
-           }
+           wrapEnter.append('div').attr('id', 'ideditor-viewer-streetside').on(pointerPrefix + 'down.streetside', function () {
+             select(window).on(pointerPrefix + 'move.streetside', function () {
+               dispatch$1.call('viewerChanged');
+             }, true);
+           }).on(pointerPrefix + 'up.streetside pointercancel.streetside', function () {
+             select(window).on(pointerPrefix + 'move.streetside', null); // continue dispatching events for a few seconds, in case viewer has inertia.

 
 

-           function click() {
-               event.preventDefault();
+             var t = timer(function (elapsed) {
+               dispatch$1.call('viewerChanged');

 
 

-               if (isDisabled()) {
-                   if (_lastPointerUpType === 'touch' || _lastPointerUpType === 'pen') {
-                       context.ui().flash
-                           .duration(2000)
-                           .iconName('#iD-icon-framed-dot')
-                           .iconClass('disabled')
-                           .text(_t('inspector.zoom_to.no_selection'))();
-                   }
-               } else {
-                   var mode = context.mode();
-                   if (mode && mode.zoomToSelected) {
-                       mode.zoomToSelected();
-                   }
+               if (elapsed > 2000) {
+                 t.stop();

                }
                }

+             });
+           }).append('div').attr('class', 'photo-attribution fillD');
+           var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
+           controlsEnter.append('button').on('click.back', step(-1)).html('◄');
+           controlsEnter.append('button').on('click.forward', step(1)).html('►'); // create working canvas for stitching together images

 
 

-               _lastPointerUpType = null;
-           }
+           wrap = wrap.merge(wrapEnter).call(setupCanvas, true); // Register viewer resize handler

 
 

-           return function(selection) {
+           context.ui().photoviewer.on('resize.streetside', function () {
+             if (_pannellumViewer) {
+               _pannellumViewer.resize();
+             }
+           });
+           _loadViewerPromise = new Promise(function (resolve, reject) {
+             var loadedCount = 0;

 
 

-               var tooltipBehavior = uiTooltip()
-                   .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-                   .title(function() {
-                       if (isDisabled()) {
-                           return _t('inspector.zoom_to.no_selection');
-                       }
-                       return _t('inspector.zoom_to.title');
-                   })
-                   .keys([_t('inspector.zoom_to.key')]);
-
-               var button = selection
-                   .append('button')
-                   .on('pointerup', pointerup)
-                   .on('click', click)
-                   .call(svgIcon('#iD-icon-framed-dot', 'light'))
-                   .call(tooltipBehavior);
-
-               function setEnabledState() {
-                   button.classed('disabled', isDisabled());
-                   if (!button.select('.tooltip.in').empty()) {
-                       button.call(tooltipBehavior.updateContent);
-                   }
-               }
+             function loaded() {
+               loadedCount += 1; // wait until both files are loaded

 
 

-               context.on('enter.uiZoomToSelection', setEnabledState);
+               if (loadedCount === 2) resolve();
+             }

 
 

-               setEnabledState();
-           };
-       }
+             var head = select('head'); // load streetside pannellum viewer css

 
 

-       function uiPane(id, context) {
+             head.selectAll('#ideditor-streetside-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-streetside-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(pannellumViewerCSS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
+               reject();
+             }); // load streetside pannellum viewer js

 
 

-           var _key;
-           var _title = '';
-           var _description = '';
-           var _iconName = '';
-           var _sections; // array of uiSection objects
+             head.selectAll('#ideditor-streetside-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-streetside-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(pannellumViewerJS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
+               reject();
+             });
+           })["catch"](function () {
+             _loadViewerPromise = null;
+           });
+           return _loadViewerPromise;

 
 

-           var _paneSelection = select(null);
+           function step(stepBy) {
+             return function () {
+               var viewer = context.container().select('.photoviewer');
+               var selected = viewer.empty() ? undefined : viewer.datum();
+               if (!selected) return;
+               var nextID = stepBy === 1 ? selected.ne : selected.pr;

 
 

-           var _paneTooltip;
+               var yaw = _pannellumViewer.getYaw();

 
 

-           var pane = {
-               id: id
-           };
+               var ca = selected.ca + yaw;
+               var origin = selected.loc; // construct a search trapezoid pointing out from current bubble

 
 

-           pane.title = function(val) {
-               if (!arguments.length) { return _title; }
-               _title = val;
-               return pane;
-           };
+               var meters = 35;
+               var p1 = [origin[0] + geoMetersToLon(meters / 5, origin[1]), origin[1]];
+               var p2 = [origin[0] + geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
+               var p3 = [origin[0] - geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
+               var p4 = [origin[0] - geoMetersToLon(meters / 5, origin[1]), origin[1]];
+               var poly = [p1, p2, p3, p4, p1]; // rotate it to face forward/backward

 
 

-           pane.key = function(val) {
-               if (!arguments.length) { return _key; }
-               _key = val;
-               return pane;
-           };
+               var angle = (stepBy === 1 ? ca : ca + 180) * (Math.PI / 180);
+               poly = geoRotate(poly, -angle, origin);
+               var extent = poly.reduce(function (extent, point) {
+                 return extent.extend(geoExtent(point));
+               }, geoExtent()); // find nearest other bubble in the search polygon

 
 

-           pane.description = function(val) {
-               if (!arguments.length) { return _description; }
-               _description = val;
-               return pane;
-           };
+               var minDist = Infinity;

 
 

-           pane.iconName = function(val) {
-               if (!arguments.length) { return _iconName; }
-               _iconName = val;
-               return pane;
-           };
+               _ssCache.bubbles.rtree.search(extent.bbox()).forEach(function (d) {
+                 if (d.data.key === selected.key) return;
+                 if (!geoPointInPolygon(d.data.loc, poly)) return;
+                 var dist = geoVecLength(d.data.loc, selected.loc);
+                 var theta = selected.ca - d.data.ca;
+                 var minTheta = Math.min(Math.abs(theta), 360 - Math.abs(theta));

 
 

-           pane.sections = function(val) {
-               if (!arguments.length) { return _sections; }
-               _sections = val;
-               return pane;
-           };
+                 if (minTheta > 20) {
+                   dist += 5; // penalize distance if camera angles don't match
+                 }

 
 

-           pane.selection = function() {
-               return _paneSelection;
-           };
+                 if (dist < minDist) {
+                   nextID = d.data.key;
+                   minDist = dist;
+                 }
+               });

 
 

-           function hidePane() {
-               context.ui().togglePanes();
+               var nextBubble = nextID && that.cachedImage(nextID);
+               if (!nextBubble) return;
+               context.map().centerEase(nextBubble.loc);
+               that.selectImage(context, nextBubble.key).yaw(yaw).showViewer(context);
+             };

            }
            }

+         },
+         yaw: function yaw(_yaw) {
+           if (typeof _yaw !== 'number') return _yaw;
+           _sceneOptions.yaw = _yaw;
+           return this;
+         },

 
 

-           pane.togglePane = function() {
-               if (event) { event.preventDefault(); }
-               _paneTooltip.hide();
-               context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
-           };
-
-           pane.renderToggleButton = function(selection) {
-
-               if (!_paneTooltip) {
-                   _paneTooltip = uiTooltip()
-                       .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-                       .title(_description)
-                       .keys([_key]);
-               }
-
-               selection
-                   .append('button')
-                   .on('click', pane.togglePane)
-                   .call(svgIcon('#' + _iconName, 'light'))
-                   .call(_paneTooltip);
-           };
-
-           pane.renderContent = function(selection) {
-               // override to fully customize content
-
-               if (_sections) {
-                   _sections.forEach(function(section) {
-                       selection.call(section.render);
-                   });
-               }
-           };
-
-           pane.renderPane = function(selection) {
-
-               _paneSelection = selection
-                   .append('div')
-                   .attr('class', 'fillL map-pane hide ' + id + '-pane')
-                   .attr('pane', id);
+         /**
+          * showViewer()
+          */
+         showViewer: function showViewer(context) {
+           var wrap = context.container().select('.photoviewer').classed('hide', false);
+           var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();

 
 

-               var heading = _paneSelection
-                   .append('div')
-                   .attr('class', 'pane-heading');
+           if (isHidden) {
+             wrap.selectAll('.photo-wrapper:not(.ms-wrapper)').classed('hide', true);
+             wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
+           }

 
 

-               heading
-                   .append('h2')
-                   .text(_title);
+           return this;
+         },

 
 

-               heading
-                   .append('button')
-                   .on('click', hidePane)
-                   .call(svgIcon('#iD-icon-close'));
+         /**
+          * hideViewer()
+          */
+         hideViewer: function hideViewer(context) {
+           var viewer = context.container().select('.photoviewer');
+           if (!viewer.empty()) viewer.datum(null);
+           viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+           context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
+           this.updateUrlImage(null);
+           return this.setStyles(context, null, true);
+         },

 
 

+         /**
+          * selectImage().
+          */
+         selectImage: function selectImage(context, key) {
+           var that = this;
+           var d = this.cachedImage(key);
+           var viewer = context.container().select('.photoviewer');
+           if (!viewer.empty()) viewer.datum(d);
+           this.setStyles(context, null, true);
+           var wrap = context.container().select('.photoviewer .ms-wrapper');
+           var attribution = wrap.selectAll('.photo-attribution').html('');
+           wrap.selectAll('.pnlm-load-box') // display "loading.."
+           .style('display', 'block');
+           if (!d) return this;
+           this.updateUrlImage(key);
+           _sceneOptions.northOffset = d.ca;
+           var line1 = attribution.append('div').attr('class', 'attribution-row');
+           var hiresDomId = utilUniqueDomId('streetside-hires'); // Add hires checkbox
+
+           var label = line1.append('label').attr('for', hiresDomId).attr('class', 'streetside-hires');
+           label.append('input').attr('type', 'checkbox').attr('id', hiresDomId).property('checked', _hires).on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             _hires = !_hires;
+             _resolution = _hires ? 1024 : 512;
+             wrap.call(setupCanvas, true);
+             var viewstate = {
+               yaw: _pannellumViewer.getYaw(),
+               pitch: _pannellumViewer.getPitch(),
+               hfov: _pannellumViewer.getHfov()
+             };
+             _sceneOptions = Object.assign(_sceneOptions, viewstate);
+             that.selectImage(context, d.key).showViewer(context);
+           });
+           label.append('span').html(_t.html('streetside.hires'));
+           var captureInfo = line1.append('div').attr('class', 'attribution-capture-info'); // Add capture date

 
 

-               _paneSelection
-                   .append('div')
-                   .attr('class', 'pane-content')
-                   .call(pane.renderContent);
+           if (d.captured_by) {
+             var yyyy = new Date().getFullYear();
+             captureInfo.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://www.microsoft.com/en-us/maps/streetside').html('©' + yyyy + ' Microsoft');
+             captureInfo.append('span').html('|');
+           }

 
 

-               if (_key) {
-                   context.keybinding()
-                       .on(_key, pane.togglePane);
-               }
-           };
+           if (d.captured_at) {
+             captureInfo.append('span').attr('class', 'captured_at').html(localeTimestamp(d.captured_at));
+           } // Add image links

 
 

-           return pane;
-       }

 
 

-       function uiSectionBackgroundDisplayOptions(context) {
+           var line2 = attribution.append('div').attr('class', 'attribution-row');
+           line2.append('a').attr('class', 'image-view-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps?cp=' + d.loc[1] + '~' + d.loc[0] + '&lvl=17&dir=' + d.ca + '&style=x&v=2&sV=1').html(_t.html('streetside.view_on_bing'));
+           line2.append('a').attr('class', 'image-report-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps/privacyreport/streetsideprivacyreport?bubbleid=' + encodeURIComponent(d.key) + '&focus=photo&lat=' + d.loc[1] + '&lng=' + d.loc[0] + '&z=17').html(_t.html('streetside.report'));
+           var bubbleIdQuadKey = d.key.toString(4);
+           var paddingNeeded = 16 - bubbleIdQuadKey.length;

 
 

-           var section = uiSection('background-display-options', context)
-               .title(_t('background.display_options'))
-               .disclosureContent(renderDisclosureContent);
+           for (var i = 0; i < paddingNeeded; i++) {
+             bubbleIdQuadKey = '0' + bubbleIdQuadKey;
+           }

 
 

-           var _detected = utilDetect();
-           var _storedOpacity = corePreferences('background-opacity');
-           var _minVal = 0.25;
-           var _maxVal = _detected.cssfilters ? 2 : 1;
+           var imgUrlPrefix = streetsideImagesApi + 'hs' + bubbleIdQuadKey;
+           var imgUrlSuffix = '.jpg?g=6338&n=z'; // Cubemap face code order matters here: front=01, right=02, back=03, left=10, up=11, down=12

 
 

-           var _sliders = _detected.cssfilters
-               ? ['brightness', 'contrast', 'saturation', 'sharpness']
-               : ['brightness'];
+           var faceKeys = ['01', '02', '03', '10', '11', '12']; // Map images to cube faces

 
 

-           var _options = {
-               brightness: (_storedOpacity !== null ? (+_storedOpacity) : 1),
-               contrast: 1,
-               saturation: 1,
-               sharpness: 1
-           };
+           var quadKeys = getQuadKeys();
+           var faces = faceKeys.map(function (faceKey) {
+             return quadKeys.map(function (quadKey) {
+               var xy = qkToXY(quadKey);
+               return {
+                 face: faceKey,
+                 url: imgUrlPrefix + faceKey + quadKey + imgUrlSuffix,
+                 x: xy[0],
+                 y: xy[1]
+               };
+             });
+           });
+           loadFaces(faces).then(function () {
+             if (!_pannellumViewer) {
+               that.initViewer();
+             } else {
+               // make a new scene
+               _currScene += 1;

 
 

-           function clamp(x, min, max) {
-               return Math.max(min, Math.min(x, max));
-           }
+               var sceneID = _currScene.toString();

 
 

-           function updateValue(d, val) {
-               if (!val && event && event.target) {
-                   val = event.target.value;
-               }
+               _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene

 
 

-               val = clamp(val, _minVal, _maxVal);

 
 

-               _options[d] = val;
-               context.background()[d](val);
+               if (_currScene > 2) {
+                 sceneID = (_currScene - 1).toString();

 
 

-               if (d === 'brightness') {
-                   corePreferences('background-opacity', val);
+                 _pannellumViewer.removeScene(sceneID);

                }
                }

-
-               section.reRender();
+             }
+           });
+           return this;
+         },
+         getSequenceKeyForBubble: function getSequenceKeyForBubble(d) {
+           return d && d.sequenceKey;
+         },
+         // Updates the currently highlighted sequence and selected bubble.
+         // Reset is only necessary when interacting with the viewport because
+         // this implicitly changes the currently selected bubble/sequence
+         setStyles: function setStyles(context, hovered, reset) {
+           if (reset) {
+             // reset all layers
+             context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
+             context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);

            }
 
            }
 

-           function renderDisclosureContent(selection) {
-               var container = selection.selectAll('.display-options-container')
-                   .data([0]);
-
-               var containerEnter = container.enter()
-                   .append('div')
-                   .attr('class', 'display-options-container controls-list');
+           var hoveredBubbleKey = hovered && hovered.key;
+           var hoveredSequenceKey = this.getSequenceKeyForBubble(hovered);
+           var hoveredSequence = hoveredSequenceKey && _ssCache.sequences[hoveredSequenceKey];
+           var hoveredBubbleKeys = hoveredSequence && hoveredSequence.bubbles.map(function (d) {
+             return d.key;
+           }) || [];
+           var viewer = context.container().select('.photoviewer');
+           var selected = viewer.empty() ? undefined : viewer.datum();
+           var selectedBubbleKey = selected && selected.key;
+           var selectedSequenceKey = this.getSequenceKeyForBubble(selected);
+           var selectedSequence = selectedSequenceKey && _ssCache.sequences[selectedSequenceKey];
+           var selectedBubbleKeys = selectedSequence && selectedSequence.bubbles.map(function (d) {
+             return d.key;
+           }) || []; // highlight sibling viewfields on either the selected or the hovered sequences

 
 

-               // add slider controls
-               var slidersEnter = containerEnter.selectAll('.display-control')
-                   .data(_sliders)
-                   .enter()
-                   .append('div')
-                   .attr('class', function(d) { return 'display-control display-control-' + d; });
-
-               slidersEnter
-                   .append('h5')
-                   .text(function(d) { return _t('background.' + d); })
-                   .append('span')
-                   .attr('class', function(d) { return 'display-option-value display-option-value-' + d; });
-
-               slidersEnter
-                   .append('input')
-                   .attr('class', function(d) { return 'display-option-input display-option-input-' + d; })
-                   .attr('type', 'range')
-                   .attr('min', _minVal)
-                   .attr('max', _maxVal)
-                   .attr('step', '0.05')
-                   .on('input', function(d) {
-                       var val = select(this).property('value');
-                       updateValue(d, val);
-                   });
+           var highlightedBubbleKeys = utilArrayUnion(hoveredBubbleKeys, selectedBubbleKeys);
+           context.container().selectAll('.layer-streetside-images .viewfield-group').classed('highlighted', function (d) {
+             return highlightedBubbleKeys.indexOf(d.key) !== -1;
+           }).classed('hovered', function (d) {
+             return d.key === hoveredBubbleKey;
+           }).classed('currentView', function (d) {
+             return d.key === selectedBubbleKey;
+           });
+           context.container().selectAll('.layer-streetside-images .sequence').classed('highlighted', function (d) {
+             return d.properties.key === hoveredSequenceKey;
+           }).classed('currentView', function (d) {
+             return d.properties.key === selectedSequenceKey;
+           }); // update viewfields if needed

 
 

-               slidersEnter
-                   .append('button')
-                   .attr('title', _t('background.reset'))
-                   .attr('class', function(d) { return 'display-option-reset display-option-reset-' + d; })
-                   .on('click', function(d) {
-                       if (event.button !== 0) { return; }
-                       updateValue(d, 1);
-                   })
-                   .call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
-
-               // reset all button
-               containerEnter
-                   .append('a')
-                   .attr('class', 'display-option-resetlink')
-                   .attr('href', '#')
-                   .text(_t('background.reset_all'))
-                   .on('click', function() {
-                       for (var i = 0; i < _sliders.length; i++) {
-                           updateValue(_sliders[i],1);
-                       }
-                   });
+           context.container().selectAll('.layer-streetside-images .viewfield-group .viewfield').attr('d', viewfieldPath);

 
 

-               // update
-               container = containerEnter
-                   .merge(container);
+           function viewfieldPath() {
+             var d = this.parentNode.__data__;

 
 

-               container.selectAll('.display-option-input')
-                   .property('value', function(d) { return _options[d]; });
+             if (d.pano && d.key !== selectedBubbleKey) {
+               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+             } else {
+               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+             }
+           }

 
 

-               container.selectAll('.display-option-value')
-                   .text(function(d) { return Math.floor(_options[d] * 100) + '%'; });
+           return this;
+         },
+         updateUrlImage: function updateUrlImage(imageKey) {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);

 
 

-               container.selectAll('.display-option-reset')
-                   .classed('disabled', function(d) { return _options[d] === 1; });
+             if (imageKey) {
+               hash.photo = 'streetside/' + imageKey;
+             } else {
+               delete hash.photo;
+             }

 
 

-               // first time only, set brightness if needed
-               if (containerEnter.size() && _options.brightness !== 1) {
-                   context.background().brightness(_options.brightness);
-               }
+             window.location.replace('#' + utilQsString(hash, true));

            }
            }

+         },

 
 

-           return section;
-       }
+         /**
+          * cache().
+          */
+         cache: function cache() {
+           return _ssCache;
+         }
+       };

 
 

-       function uiSettingsCustomBackground() {
-           var dispatch$1 = dispatch('change');
+       var _apibase = 'https://taginfo.openstreetmap.org/api/4/';
+       var _inflight = {};
+       var _popularKeys = {};
+       var _taginfoCache = {};
+       var tag_sorts = {
+         point: 'count_nodes',
+         vertex: 'count_nodes',
+         area: 'count_ways',
+         line: 'count_ways'
+       };
+       var tag_sort_members = {
+         point: 'count_node_members',
+         vertex: 'count_node_members',
+         area: 'count_way_members',
+         line: 'count_way_members',
+         relation: 'count_relation_members'
+       };
+       var tag_filters = {
+         point: 'nodes',
+         vertex: 'nodes',
+         area: 'ways',
+         line: 'ways'
+       };
+       var tag_members_fractions = {
+         point: 'count_node_members_fraction',
+         vertex: 'count_node_members_fraction',
+         area: 'count_way_members_fraction',
+         line: 'count_way_members_fraction',
+         relation: 'count_relation_members_fraction'
+       };

 
 

-           function render(selection) {
-               // keep separate copies of original and current settings
-               var _origSettings = {
-                   template: corePreferences('background-custom-template')
-               };
-               var _currSettings = {
-                   template: corePreferences('background-custom-template')
-               };
+       function sets(params, n, o) {
+         if (params.geometry && o[params.geometry]) {
+           params[n] = o[params.geometry];
+         }

 
 

-               var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
-               var modal = uiConfirm(selection).okButton();
-
-               modal
-                   .classed('settings-modal settings-custom-background', true);
-
-               modal.select('.modal-section.header')
-                   .append('h3')
-                   .text(_t('settings.custom_background.header'));
-
-
-               var textSection = modal.select('.modal-section.message-text');
-
-               var instructions =
-                   (_t('settings.custom_background.instructions.info')) + "\n" +
-                   '\n' +
-                   "#### " + (_t('settings.custom_background.instructions.wms.tokens_label')) + "\n" +
-                   "* " + (_t('settings.custom_background.instructions.wms.tokens.proj')) + "\n" +
-                   "* " + (_t('settings.custom_background.instructions.wms.tokens.wkid')) + "\n" +
-                   "* " + (_t('settings.custom_background.instructions.wms.tokens.dimensions')) + "\n" +
-                   "* " + (_t('settings.custom_background.instructions.wms.tokens.bbox')) + "\n" +
-                   '\n' +
-                   "#### " + (_t('settings.custom_background.instructions.tms.tokens_label')) + "\n" +
-                   "* " + (_t('settings.custom_background.instructions.tms.tokens.xyz')) + "\n" +
-                   "* " + (_t('settings.custom_background.instructions.tms.tokens.flipped_y')) + "\n" +
-                   "* " + (_t('settings.custom_background.instructions.tms.tokens.switch')) + "\n" +
-                   "* " + (_t('settings.custom_background.instructions.tms.tokens.quadtile')) + "\n" +
-                   "* " + (_t('settings.custom_background.instructions.tms.tokens.scale_factor')) + "\n" +
-                   '\n' +
-                   "#### " + (_t('settings.custom_background.instructions.example')) + "\n" +
-                   "`" + example + "`";
-
-               textSection
-                   .append('div')
-                   .attr('class', 'instructions-template')
-                   .html(marked_1(instructions));
+         return params;
+       }

 
 

-               textSection
-                   .append('textarea')
-                   .attr('class', 'field-template')
-                   .attr('placeholder', _t('settings.custom_background.template.placeholder'))
-                   .call(utilNoAuto)
-                   .property('value', _currSettings.template);
+       function setFilter(params) {
+         return sets(params, 'filter', tag_filters);
+       }

 
 

+       function setSort(params) {
+         return sets(params, 'sortname', tag_sorts);
+       }

 
 

-               // insert a cancel button
-               var buttonSection = modal.select('.modal-section.buttons');
+       function setSortMembers(params) {
+         return sets(params, 'sortname', tag_sort_members);
+       }

 
 

-               buttonSection
-                   .insert('button', '.ok-button')
-                   .attr('class', 'button cancel-button secondary-action')
-                   .text(_t('confirm.cancel'));
+       function clean(params) {
+         return utilObjectOmit(params, ['geometry', 'debounce']);
+       }

 
 

+       function filterKeys(type) {
+         var count_type = type ? 'count_' + type : 'count_all';
+         return function (d) {
+           return parseFloat(d[count_type]) > 2500 || d.in_wiki;
+         };
+       }

 
 

-               buttonSection.select('.cancel-button')
-                   .on('click.cancel', clickCancel);
+       function filterMultikeys(prefix) {
+         return function (d) {
+           // d.key begins with prefix, and d.key contains no additional ':'s
+           var re = new RegExp('^' + prefix + '(.*)$');
+           var matches = d.key.match(re) || [];
+           return matches.length === 2 && matches[1].indexOf(':') === -1;
+         };
+       }

 
 

-               buttonSection.select('.ok-button')
-                   .attr('disabled', isSaveDisabled)
-                   .on('click.save', clickSave);
+       function filterValues(allowUpperCase) {
+         return function (d) {
+           if (d.value.match(/[;,]/) !== null) return false; // exclude some punctuation

 
 

+           if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) return false; // exclude uppercase letters

 
 

-               function isSaveDisabled() {
-                   return null;
-               }
+           return parseFloat(d.fraction) > 0.0;
+         };
+       }

 
 

+       function filterRoles(geometry) {
+         return function (d) {
+           if (d.role === '') return false; // exclude empty role

 
 

-               // restore the original template
-               function clickCancel() {
-                   textSection.select('.field-template').property('value', _origSettings.template);
-                   corePreferences('background-custom-template', _origSettings.template);
-                   this.blur();
-                   modal.close();
-               }
+           if (d.role.match(/[A-Z*;,]/) !== null) return false; // exclude uppercase letters and some punctuation

 
 

-               // accept the current template
-               function clickSave() {
-                   _currSettings.template = textSection.select('.field-template').property('value');
-                   corePreferences('background-custom-template', _currSettings.template);
-                   this.blur();
-                   modal.close();
-                   dispatch$1.call('change', this, _currSettings);
-               }
-           }
+           return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
+         };
+       }

 
 

-           return utilRebind(render, dispatch$1, 'on');
+       function valKey(d) {
+         return {
+           value: d.key,
+           title: d.key
+         };

        }
 
        }
 

-       function uiSectionBackgroundList(context) {
+       function valKeyDescription(d) {
+         var obj = {
+           value: d.value,
+           title: d.description || d.value
+         };

 
 

-           var _backgroundList = select(null);
+         if (d.count) {
+           obj.count = d.count;
+         }

 
 

-           var _customSource = context.background().findSource('custom');
+         return obj;
+       }

 
 

-           var _settingsCustomBackground = uiSettingsCustomBackground()
-               .on('change', customChanged);
+       function roleKey(d) {
+         return {
+           value: d.role,
+           title: d.role
+         };
+       } // sort keys with ':' lower than keys without ':'

 
 

-           var section = uiSection('background-list', context)
-               .title(_t('background.backgrounds'))
-               .disclosureContent(renderDisclosureContent);

 
 

-           function previousBackgroundID() {
-               return corePreferences('background-last-used-toggle');
-           }
+       function sortKeys(a, b) {
+         return a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1 ? -1 : a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1 ? 1 : 0;
+       }

 
 

-           function renderDisclosureContent(selection) {
+       var debouncedRequest = debounce(request, 300, {
+         leading: false
+       });

 
 

-               // the background list
-               var container = selection.selectAll('.layer-background-list')
-                   .data([0]);
+       function request(url, params, exactMatch, callback, loaded) {
+         if (_inflight[url]) return;
+         if (checkCache(url, params, exactMatch, callback)) return;
+         var controller = new AbortController();
+         _inflight[url] = controller;
+         d3_json(url, {
+           signal: controller.signal
+         }).then(function (result) {
+           delete _inflight[url];
+           if (loaded) loaded(null, result);
+         })["catch"](function (err) {
+           delete _inflight[url];
+           if (err.name === 'AbortError') return;
+           if (loaded) loaded(err.message);
+         });
+       }

 
 

-               _backgroundList = container.enter()
-                   .append('ul')
-                   .attr('class', 'layer-list layer-background-list')
-                   .attr('dir', 'auto')
-                   .merge(container);
+       function checkCache(url, params, exactMatch, callback) {
+         var rp = params.rp || 25;
+         var testQuery = params.query || '';
+         var testUrl = url;

 
 

+         do {
+           var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)

 
 

-               // add minimap toggle below list
-               var bgExtrasListEnter = selection.selectAll('.bg-extras-list')
-                   .data([0])
-                   .enter()
-                   .append('ul')
-                   .attr('class', 'layer-list bg-extras-list');
-
-               var minimapLabelEnter = bgExtrasListEnter
-                   .append('li')
-                   .attr('class', 'minimap-toggle-item')
-                   .append('label')
-                   .call(uiTooltip()
-                       .title(_t('background.minimap.tooltip'))
-                       .keys([_t('background.minimap.key')])
-                       .placement('top')
-                   );
-
-               minimapLabelEnter
-                   .append('input')
-                   .attr('type', 'checkbox')
-                   .on('change', function() {
-                       event.preventDefault();
-                       uiMapInMap.toggle();
-                   });
+           if (hit && (url === testUrl || hit.length < rp)) {
+             callback(null, hit);
+             return true;
+           } // don't try to shorten the query

 
 

-               minimapLabelEnter
-                   .append('span')
-                   .text(_t('background.minimap.description'));
-
-
-               var panelLabelEnter = bgExtrasListEnter
-                   .append('li')
-                   .attr('class', 'background-panel-toggle-item')
-                   .append('label')
-                   .call(uiTooltip()
-                       .title(_t('background.panel.tooltip'))
-                       .keys([uiCmd('⌘⇧' + _t('info_panels.background.key'))])
-                       .placement('top')
-                   );
-
-               panelLabelEnter
-                   .append('input')
-                   .attr('type', 'checkbox')
-                   .on('change', function() {
-                       event.preventDefault();
-                       context.ui().info.toggle('background');
-                   });

 
 

-               panelLabelEnter
-                   .append('span')
-                   .text(_t('background.panel.description'));
-
-               var locPanelLabelEnter = bgExtrasListEnter
-                   .append('li')
-                   .attr('class', 'location-panel-toggle-item')
-                   .append('label')
-                   .call(uiTooltip()
-                       .title(_t('background.location_panel.tooltip'))
-                       .keys([uiCmd('⌘⇧' + _t('info_panels.location.key'))])
-                       .placement('top')
-                   );
-
-               locPanelLabelEnter
-                   .append('input')
-                   .attr('type', 'checkbox')
-                   .on('change', function() {
-                       event.preventDefault();
-                       context.ui().info.toggle('location');
-                   });
+           if (exactMatch || !testQuery.length) return false; // do shorten the query to see if we already have a cached result
+           // that has returned fewer than max results (rp)

 
 

-               locPanelLabelEnter
-                   .append('span')
-                   .text(_t('background.location_panel.description'));
+           testQuery = testQuery.slice(0, -1);
+           testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
+         } while (testQuery.length >= 0);

 
 

+         return false;
+       }

 
 

-               // "Info / Report a Problem" link
-               selection.selectAll('.imagery-faq')
-                   .data([0])
-                   .enter()
-                   .append('div')
-                   .attr('class', 'imagery-faq')
-                   .append('a')
-                   .attr('target', '_blank')
-                   .call(svgIcon('#iD-icon-out-link', 'inline'))
-                   .attr('href', 'https://github.com/openstreetmap/iD/blob/develop/FAQ.md#how-can-i-report-an-issue-with-background-imagery')
-                   .append('span')
-                   .text(_t('background.imagery_problem_faq'));
-
-               _backgroundList
-                   .call(drawListItems, 'radio', chooseBackground, function(d) { return !d.isHidden() && !d.overlay; });
-           }
-
-           function setTooltips(selection) {
-               selection.each(function(d, i, nodes) {
-                   var item = select(this).select('label');
-                   var span = item.select('span');
-                   var placement = (i < nodes.length / 2) ? 'bottom' : 'top';
-                   var description = d.description();
-                   var isOverflowing = (span.property('clientWidth') !== span.property('scrollWidth'));
-
-                   item.call(uiTooltip().destroyAny);
-
-                   if (d.id === previousBackgroundID()) {
-                       item.call(uiTooltip()
-                           .placement(placement)
-                           .title('<div>' + _t('background.switch') + '</div>')
-                           .keys([uiCmd('⌘' + _t('background.key'))])
-                       );
-                   } else if (description || isOverflowing) {
-                       item.call(uiTooltip()
-                           .placement(placement)
-                           .title(description || d.name())
-                       );
-                   }
-               });
-           }
+       var serviceTaginfo = {
+         init: function init() {
+           _inflight = {};
+           _taginfoCache = {};
+           _popularKeys = {
+             // manually exclude some keys – #5377, #7485
+             postal_code: true,
+             full_name: true,
+             loc_name: true,
+             reg_name: true,
+             short_name: true,
+             sorting_name: true,
+             artist_name: true,
+             nat_name: true,
+             long_name: true,
+             'bridge:name': true
+           }; // Fetch popular keys.  We'll exclude these from `values`
+           // lookups because they stress taginfo, and they aren't likely
+           // to yield meaningful autocomplete results.. see #3955

 
 

-           function drawListItems(layerList, type, change, filter) {
-               var sources = context.background()
-                   .sources(context.map().extent(), context.map().zoom(), true)
-                   .filter(filter);
+           var params = {
+             rp: 100,
+             sortname: 'values_all',
+             sortorder: 'desc',
+             page: 1,
+             debounce: false,
+             lang: _mainLocalizer.languageCode()
+           };
+           this.keys(params, function (err, data) {
+             if (err) return;
+             data.forEach(function (d) {
+               if (d.value === 'opening_hours') return; // exception
+
+               _popularKeys[d.value] = true;
+             });
+           });
+         },
+         reset: function reset() {
+           Object.values(_inflight).forEach(function (controller) {
+             controller.abort();
+           });
+           _inflight = {};
+         },
+         keys: function keys(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest : request;
+           params = clean(setSort(params));
+           params = Object.assign({
+             rp: 10,
+             sortname: 'count_all',
+             sortorder: 'desc',
+             page: 1,
+             lang: _mainLocalizer.languageCode()
+           }, params);
+           var url = _apibase + 'keys/all?' + utilQsString(params);
+           doRequest(url, params, false, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               var f = filterKeys(params.filter);
+               var result = d.data.filter(f).sort(sortKeys).map(valKey);
+               _taginfoCache[url] = result;
+               callback(null, result);
+             }
+           });
+         },
+         multikeys: function multikeys(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest : request;
+           params = clean(setSort(params));
+           params = Object.assign({
+             rp: 25,
+             sortname: 'count_all',
+             sortorder: 'desc',
+             page: 1,
+             lang: _mainLocalizer.languageCode()
+           }, params);
+           var prefix = params.query;
+           var url = _apibase + 'keys/all?' + utilQsString(params);
+           doRequest(url, params, true, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               var f = filterMultikeys(prefix);
+               var result = d.data.filter(f).map(valKey);
+               _taginfoCache[url] = result;
+               callback(null, result);
+             }
+           });
+         },
+         values: function values(params, callback) {
+           // Exclude popular keys from values lookups.. see #3955
+           var key = params.key;

 
 

-               var layerLinks = layerList.selectAll('li')
-                   .data(sources, function(d) { return d.name(); });
+           if (key && _popularKeys[key]) {
+             callback(null, []);
+             return;
+           }

 
 

-               layerLinks.exit()
-                   .remove();
+           var doRequest = params.debounce ? debouncedRequest : request;
+           params = clean(setSort(setFilter(params)));
+           params = Object.assign({
+             rp: 25,
+             sortname: 'count_all',
+             sortorder: 'desc',
+             page: 1,
+             lang: _mainLocalizer.languageCode()
+           }, params);
+           var url = _apibase + 'key/values?' + utilQsString(params);
+           doRequest(url, params, false, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               // In most cases we prefer taginfo value results with lowercase letters.
+               // A few OSM keys expect values to contain uppercase values (see #3377).
+               // This is not an exhaustive list (e.g. `name` also has uppercase values)
+               // but these are the fields where taginfo value lookup is most useful.
+               var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery/;
+               var allowUpperCase = re.test(params.key);
+               var f = filterValues(allowUpperCase);
+               var result = d.data.filter(f).map(valKeyDescription);
+               _taginfoCache[url] = result;
+               callback(null, result);
+             }
+           });
+         },
+         roles: function roles(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest : request;
+           var geometry = params.geometry;
+           params = clean(setSortMembers(params));
+           params = Object.assign({
+             rp: 25,
+             sortname: 'count_all_members',
+             sortorder: 'desc',
+             page: 1,
+             lang: _mainLocalizer.languageCode()
+           }, params);
+           var url = _apibase + 'relation/roles?' + utilQsString(params);
+           doRequest(url, params, true, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               var f = filterRoles(geometry);
+               var result = d.data.filter(f).map(roleKey);
+               _taginfoCache[url] = result;
+               callback(null, result);
+             }
+           });
+         },
+         docs: function docs(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest : request;
+           params = clean(setSort(params));
+           var path = 'key/wiki_pages?';

 
 

-               var enter = layerLinks.enter()
-                   .append('li')
-                   .classed('layer-custom', function(d) { return d.id === 'custom'; })
-                   .classed('best', function(d) { return d.best(); });
+           if (params.value) {
+             path = 'tag/wiki_pages?';
+           } else if (params.rtype) {
+             path = 'relation/wiki_pages?';
+           }

 
 

-               var label = enter
-                   .append('label');
+           var url = _apibase + path + utilQsString(params);
+           doRequest(url, params, true, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               _taginfoCache[url] = d.data;
+               callback(null, d.data);
+             }
+           });
+         },
+         apibase: function apibase(_) {
+           if (!arguments.length) return _apibase;
+           _apibase = _;
+           return this;
+         }
+       };

 
 

-               label
-                   .append('input')
-                   .attr('type', type)
-                   .attr('name', 'layers')
-                   .on('change', change);
+       /**
+        * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
+        *
+        * @name feature
+        * @param {Geometry} geometry input geometry
+        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+        * @param {Object} [options={}] Optional Parameters
+        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+        * @param {string|number} [options.id] Identifier associated with the Feature
+        * @returns {Feature} a GeoJSON Feature
+        * @example
+        * var geometry = {
+        *   "type": "Point",
+        *   "coordinates": [110, 50]
+        * };
+        *
+        * var feature = turf.feature(geometry);
+        *
+        * //=feature
+        */

 
 

-               label
-                   .append('span')
-                   .text(function(d) { return d.name(); });
+       function feature(geom, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }

 
 

-               enter.filter(function(d) { return d.id === 'custom'; })
-                   .append('button')
-                   .attr('class', 'layer-browse')
-                   .call(uiTooltip()
-                       .title(_t('settings.custom_background.tooltip'))
-                       .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-                   )
-                   .on('click', editCustom)
-                   .call(svgIcon('#iD-icon-more'));
+         var feat = {
+           type: "Feature"
+         };

 
 

-               enter.filter(function(d) { return d.best(); })
-                   .append('div')
-                   .attr('class', 'best')
-                   .call(uiTooltip()
-                       .title(_t('background.best_imagery'))
-                       .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-                   )
-                   .append('span')
-                   .html('&#9733;');
+         if (options.id === 0 || options.id) {
+           feat.id = options.id;
+         }

 
 

+         if (options.bbox) {
+           feat.bbox = options.bbox;
+         }

 
 

-               layerList.selectAll('li')
-                   .sort(sortSources);
+         feat.properties = properties || {};
+         feat.geometry = geom;
+         return feat;
+       }
+       /**
+        * Creates a {@link Polygon} {@link Feature} from an Array of LinearRings.
+        *
+        * @name polygon
+        * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
+        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+        * @param {Object} [options={}] Optional Parameters
+        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+        * @param {string|number} [options.id] Identifier associated with the Feature
+        * @returns {Feature<Polygon>} Polygon Feature
+        * @example
+        * var polygon = turf.polygon([[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]], { name: 'poly1' });
+        *
+        * //=polygon
+        */

 
 

-               layerList
-                   .call(updateLayerSelections);
+       function polygon(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }

 
 

+         for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
+           var ring = coordinates_1[_i];

 
 

-               function sortSources(a, b) {
-                   return a.best() && !b.best() ? -1
-                       : b.best() && !a.best() ? 1
-                       : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
-               }
+           if (ring.length < 4) {
+             throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");

            }
 
            }
 

-           function updateLayerSelections(selection) {
-               function active(d) {
-                   return context.background().showsLayer(d);
-               }
-
-               selection.selectAll('li')
-                   .classed('active', active)
-                   .classed('switch', function(d) { return d.id === previousBackgroundID(); })
-                   .call(setTooltips)
-                   .selectAll('input')
-                   .property('checked', active);
+           for (var j = 0; j < ring[ring.length - 1].length; j++) {
+             // Check if first point of Polygon contains two numbers
+             if (ring[ring.length - 1][j] !== ring[0][j]) {
+               throw new Error("First and last Position are not equivalent.");
+             }

            }
            }

+         }

 
 

+         var geom = {
+           type: "Polygon",
+           coordinates: coordinates
+         };
+         return feature(geom, properties, options);
+       }
+       /**
+        * Creates a {@link LineString} {@link Feature} from an Array of Positions.
+        *
+        * @name lineString
+        * @param {Array<Array<number>>} coordinates an array of Positions
+        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+        * @param {Object} [options={}] Optional Parameters
+        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+        * @param {string|number} [options.id] Identifier associated with the Feature
+        * @returns {Feature<LineString>} LineString Feature
+        * @example
+        * var linestring1 = turf.lineString([[-24, 63], [-23, 60], [-25, 65], [-20, 69]], {name: 'line 1'});
+        * var linestring2 = turf.lineString([[-14, 43], [-13, 40], [-15, 45], [-10, 49]], {name: 'line 2'});
+        *
+        * //=linestring1
+        * //=linestring2
+        */

 
 

-           function chooseBackground(d) {
-               if (d.id === 'custom' && !d.template()) {
-                   return editCustom();
-               }
+       function lineString(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }

 
 

-               event.preventDefault();
-               var previousBackground = context.background().baseLayerSource();
-               corePreferences('background-last-used-toggle', previousBackground.id);
-               corePreferences('background-last-used', d.id);
-               context.background().baseLayerSource(d);
-               document.activeElement.blur();
-           }
+         if (coordinates.length < 2) {
+           throw new Error("coordinates must be an array of two or more positions");
+         }

 
 

+         var geom = {
+           type: "LineString",
+           coordinates: coordinates
+         };
+         return feature(geom, properties, options);
+       }
+       /**
+        * Creates a {@link Feature<MultiLineString>} based on a
+        * coordinate array. Properties can be added optionally.
+        *
+        * @name multiLineString
+        * @param {Array<Array<Array<number>>>} coordinates an array of LineStrings
+        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+        * @param {Object} [options={}] Optional Parameters
+        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+        * @param {string|number} [options.id] Identifier associated with the Feature
+        * @returns {Feature<MultiLineString>} a MultiLineString feature
+        * @throws {Error} if no coordinates are passed
+        * @example
+        * var multiLine = turf.multiLineString([[[0,0],[10,10]]]);
+        *
+        * //=multiLine
+        */

 
 

-           function customChanged(d) {
-               if (d && d.template) {
-                   _customSource.template(d.template);
-                   chooseBackground(_customSource);
-               } else {
-                   _customSource.template('');
-                   chooseBackground(context.background().findSource('none'));
-               }
-           }
+       function multiLineString(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }

 
 

+         var geom = {
+           type: "MultiLineString",
+           coordinates: coordinates
+         };
+         return feature(geom, properties, options);
+       }
+       /**
+        * Creates a {@link Feature<MultiPolygon>} based on a
+        * coordinate array. Properties can be added optionally.
+        *
+        * @name multiPolygon
+        * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygons
+        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+        * @param {Object} [options={}] Optional Parameters
+        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+        * @param {string|number} [options.id] Identifier associated with the Feature
+        * @returns {Feature<MultiPolygon>} a multipolygon feature
+        * @throws {Error} if no coordinates are passed
+        * @example
+        * var multiPoly = turf.multiPolygon([[[[0,0],[0,10],[10,10],[10,0],[0,0]]]]);
+        *
+        * //=multiPoly
+        *
+        */

 
 

-           function editCustom() {
-               event.preventDefault();
-               context.container()
-                   .call(_settingsCustomBackground);
-           }
+       function multiPolygon(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }

 
 

+         var geom = {
+           type: "MultiPolygon",
+           coordinates: coordinates
+         };
+         return feature(geom, properties, options);
+       }

 
 

-           context.background()
-               .on('change.background_list', function() {
-                   _backgroundList.call(updateLayerSelections);
-               });
+       /**
+        * Get Geometry from Feature or Geometry Object
+        *
+        * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
+        * @returns {Geometry|null} GeoJSON Geometry Object
+        * @throws {Error} if geojson is not a Feature or Geometry Object
+        * @example
+        * var point = {
+        *   "type": "Feature",
+        *   "properties": {},
+        *   "geometry": {
+        *     "type": "Point",
+        *     "coordinates": [110, 40]
+        *   }
+        * }
+        * var geom = turf.getGeom(point)
+        * //={"type": "Point", "coordinates": [110, 40]}
+        */

 
 

-           context.map()
-               .on('move.background_list',
-                   debounce(function() {
-                       // layers in-view may have changed due to map move
-                       window.requestIdleCallback(section.reRender);
-                   }, 1000)
-               );
+       function getGeom(geojson) {
+         if (geojson.type === "Feature") {
+           return geojson.geometry;
+         }

 
 

-           return section;
+         return geojson;

        }
 
        }
 

-       function uiSectionBackgroundOffset(context) {
-
-           var section = uiSection('background-offset', context)
-               .title(_t('background.fix_misalignment'))
-               .disclosureContent(renderDisclosureContent)
-               .expandedByDefault(false);
-
-           var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+       // Cohen-Sutherland line clipping algorithm, adapted to efficiently
+       // handle polylines rather than just segments
+       function lineclip(points, bbox, result) {
+         var len = points.length,
+             codeA = bitCode(points[0], bbox),
+             part = [],
+             i,
+             codeB,
+             lastCode;
+         var a;
+         var b;
+         if (!result) result = [];

 
 

-           var _directions = [
-               ['right', [0.5, 0]],
-               ['top', [0, -0.5]],
-               ['left', [-0.5, 0]],
-               ['bottom', [0, 0.5]]
-           ];
+         for (i = 1; i < len; i++) {
+           a = points[i - 1];
+           b = points[i];
+           codeB = lastCode = bitCode(b, bbox);

 
 

+           while (true) {
+             if (!(codeA | codeB)) {
+               // accept
+               part.push(a);
+
+               if (codeB !== lastCode) {
+                 // segment went outside
+                 part.push(b);
+
+                 if (i < len - 1) {
+                   // start a new line
+                   result.push(part);
+                   part = [];
+                 }
+               } else if (i === len - 1) {
+                 part.push(b);
+               }

 
 

-           function cancelEvent() {
-               event.stopPropagation();
-               event.preventDefault();
+               break;
+             } else if (codeA & codeB) {
+               // trivial reject
+               break;
+             } else if (codeA) {
+               // a outside, intersect with clip edge
+               a = intersect(a, b, codeA, bbox);
+               codeA = bitCode(a, bbox);
+             } else {
+               // b outside
+               b = intersect(a, b, codeB, bbox);
+               codeB = bitCode(b, bbox);
+             }

            }
 
            }
 

+           codeA = lastCode;
+         }

 
 

-           function updateValue() {
-               var meters = geoOffsetToMeters(context.background().offset());
-               var x = +meters[0].toFixed(2);
-               var y = +meters[1].toFixed(2);
-
-               context.container().selectAll('.nudge-inner-rect')
-                   .select('input')
-                   .classed('error', false)
-                   .property('value', x + ', ' + y);
+         if (part.length) result.push(part);
+         return result;
+       } // Sutherland-Hodgeman polygon clipping algorithm

 
 

-               context.container().selectAll('.nudge-reset')
-                   .classed('disabled', function() {
-                       return (x === 0 && y === 0);
-                   });
-           }
+       function polygonclip(points, bbox) {
+         var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle

 
 

+         for (edge = 1; edge <= 8; edge *= 2) {
+           result = [];
+           prev = points[points.length - 1];
+           prevInside = !(bitCode(prev, bbox) & edge);

 
 

-           function resetOffset() {
-               context.background().offset([0, 0]);
-               updateValue();
-           }
+           for (i = 0; i < points.length; i++) {
+             p = points[i];
+             inside = !(bitCode(p, bbox) & edge); // if segment goes through the clip window, add an intersection

 
 

+             if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox));
+             if (inside) result.push(p); // add a point if it's inside

 
 

-           function nudge(d) {
-               context.background().nudge(d, context.map().zoom());
-               updateValue();
+             prev = p;
+             prevInside = inside;

            }
 
            }
 

+           points = result;
+           if (!points.length) break;
+         }

 
 

-           function pointerdownNudgeButton(d) {
-               var interval;
-               var timeout = window.setTimeout(function() {
-                       interval = window.setInterval(nudge.bind(null, d), 100);
-                   }, 500);
+         return result;
+       } // intersect a segment against one of the 4 lines that make up the bbox

 
 

-               function doneNudge() {
-                   window.clearTimeout(timeout);
-                   window.clearInterval(interval);
-                   select(window)
-                       .on(_pointerPrefix + 'up.buttonoffset', null, true)
-                       .on(_pointerPrefix + 'down.buttonoffset', null, true);
-               }
+       function intersect(a, b, edge, bbox) {
+         return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] // top
+         : edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] // bottom
+         : edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] // right
+         : edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] // left
+         : null;
+       } // bit code reflects the point position relative to the bbox:
+       //         left  mid  right
+       //    top  1001  1000  1010
+       //    mid  0001  0000  0010
+       // bottom  0101  0100  0110

 
 

-               select(window)
-                   .on(_pointerPrefix + 'up.buttonoffset', doneNudge, true)
-                   .on(_pointerPrefix + 'down.buttonoffset', doneNudge, true);

 
 

-               nudge(d);
-           }
+       function bitCode(p, bbox) {
+         var code = 0;
+         if (p[0] < bbox[0]) code |= 1; // left
+         else if (p[0] > bbox[2]) code |= 2; // right

 
 

+         if (p[1] < bbox[1]) code |= 4; // bottom
+         else if (p[1] > bbox[3]) code |= 8; // top

 
 

-           function inputOffset() {
-               var input = select(this);
-               var d = input.node().value;
+         return code;
+       }

 
 

-               if (d === '') { return resetOffset(); }
+       /**
+        * Takes a {@link Feature} and a bbox and clips the feature to the bbox using
+        * [lineclip](https://github.com/mapbox/lineclip).
+        * May result in degenerate edges when clipping Polygons.
+        *
+        * @name bboxClip
+        * @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
+        * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
+        * @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
+        * @example
+        * var bbox = [0, 0, 10, 10];
+        * var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
+        *
+        * var clipped = turf.bboxClip(poly, bbox);
+        *
+        * //addToMap
+        * var addToMap = [bbox, poly, clipped]
+        */

 
 

-               d = d.replace(/;/g, ',').split(',').map(function(n) {
-                   // if n is NaN, it will always get mapped to false.
-                   return !isNaN(n) && n;
-               });
+       function bboxClip(feature, bbox) {
+         var geom = getGeom(feature);
+         var type = geom.type;
+         var properties = feature.type === "Feature" ? feature.properties : {};
+         var coords = geom.coordinates;
+
+         switch (type) {
+           case "LineString":
+           case "MultiLineString":
+             var lines_1 = [];
+
+             if (type === "LineString") {
+               coords = [coords];
+             }

 
 

-               if (d.length !== 2 || !d[0] || !d[1]) {
-                   input.classed('error', true);
-                   return;
-               }
+             coords.forEach(function (line) {
+               lineclip(line, bbox, lines_1);
+             });

 
 

-               context.background().offset(geoMetersToOffset(d));
-               updateValue();
-           }
+             if (lines_1.length === 1) {
+               return lineString(lines_1[0], properties);
+             }

 
 

+             return multiLineString(lines_1, properties);

 
 

-           function dragOffset() {
-               if (event.button !== 0) { return; }
+           case "Polygon":
+             return polygon(clipPolygon(coords, bbox), properties);

 
 

-               var origin = [event.clientX, event.clientY];
+           case "MultiPolygon":
+             return multiPolygon(coords.map(function (poly) {
+               return clipPolygon(poly, bbox);
+             }), properties);

 
 

-               var pointerId = event.pointerId || 'mouse';
+           default:
+             throw new Error("geometry " + type + " not supported");
+         }
+       }

 
 

-               context.container()
-                   .append('div')
-                   .attr('class', 'nudge-surface');
+       function clipPolygon(rings, bbox) {
+         var outRings = [];

 
 

-               select(window)
-                   .on(_pointerPrefix + 'move.drag-bg-offset', pointermove)
-                   .on(_pointerPrefix + 'up.drag-bg-offset', pointerup);
+         for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
+           var ring = rings_1[_i];
+           var clipped = polygonclip(ring, bbox);

 
 

-               if (_pointerPrefix === 'pointer') {
-                   select(window)
-                       .on('pointercancel.drag-bg-offset', pointerup);
-               }
+           if (clipped.length > 0) {
+             if (clipped[0][0] !== clipped[clipped.length - 1][0] || clipped[0][1] !== clipped[clipped.length - 1][1]) {
+               clipped.push(clipped[0]);
+             }

 
 

-               function pointermove() {
-                   if (pointerId !== (event.pointerId || 'mouse')) { return; }
+             if (clipped.length >= 4) {
+               outRings.push(clipped);
+             }
+           }
+         }

 
 

-                   var latest = [event.clientX, event.clientY];
-                   var d = [
-                       -(origin[0] - latest[0]) / 4,
-                       -(origin[1] - latest[1]) / 4
-                   ];
+         return outRings;
+       }

 
 

-                   origin = latest;
-                   nudge(d);
-               }
+       var tiler = utilTiler().tileSize(512).margin(1);
+       var dispatch = dispatch$8('loadedData');

 
 

-               function pointerup() {
-                   if (pointerId !== (event.pointerId || 'mouse')) { return; }
-                   if (event.button !== 0) { return; }
+       var _vtCache;

 
 

-                   context.container().selectAll('.nudge-surface')
-                       .remove();
+       function abortRequest(controller) {
+         controller.abort();
+       }

 
 

-                   select(window)
-                       .on('.drag-bg-offset', null);
-               }
-           }
+       function vtToGeoJSON(data, tile, mergeCache) {
+         var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
+         var layers = Object.keys(vectorTile$1.layers);

 
 

+         if (!Array.isArray(layers)) {
+           layers = [layers];
+         }

 
 

-           function renderDisclosureContent(selection) {
-               var container = selection.selectAll('.nudge-container')
-                   .data([0]);
+         var features = [];
+         layers.forEach(function (layerID) {
+           var layer = vectorTile$1.layers[layerID];

 
 

-               var containerEnter = container.enter()
-                   .append('div')
-                   .attr('class', 'nudge-container cf');
+           if (layer) {
+             for (var i = 0; i < layer.length; i++) {
+               var feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+               var geometry = feature.geometry; // Treat all Polygons as MultiPolygons

 
 

-               containerEnter
-                   .append('div')
-                   .attr('class', 'nudge-instructions')
-                   .text(_t('background.offset'));
+               if (geometry.type === 'Polygon') {
+                 geometry.type = 'MultiPolygon';
+                 geometry.coordinates = [geometry.coordinates];
+               }

 
 

-               var nudgeEnter = containerEnter
-                   .append('div')
-                   .attr('class', 'nudge-outer-rect')
-                   .on(_pointerPrefix + 'down', dragOffset);
+               var isClipped = false; // Clip to tile bounds

 
 

-               nudgeEnter
-                   .append('div')
-                   .attr('class', 'nudge-inner-rect')
-                   .append('input')
-                   .on('change', inputOffset);
+               if (geometry.type === 'MultiPolygon') {
+                 var featureClip = bboxClip(feature, tile.extent.rectangle());

 
 

-               containerEnter
-                   .append('div')
-                   .selectAll('button')
-                   .data(_directions).enter()
-                   .append('button')
-                   .attr('class', function(d) { return d[0] + ' nudge'; })
-                   .on('contextmenu', cancelEvent)
-                   .on(_pointerPrefix + 'down', function(d) {
-                       if (event.button !== 0) { return; }
-                       pointerdownNudgeButton(d[1]);
-                   });
+                 if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
+                   // feature = featureClip;
+                   isClipped = true;
+                 }

 
 

-               containerEnter
-                   .append('button')
-                   .attr('title', _t('background.reset'))
-                   .attr('class', 'nudge-reset disabled')
-                   .on('contextmenu', cancelEvent)
-                   .on('click', function() {
-                       event.preventDefault();
-                       if (event.button !== 0) { return; }
-                       resetOffset();
-                   })
-                   .call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
+                 if (!feature.geometry.coordinates.length) continue; // not actually on this tile

 
 

-               updateValue();
-           }
+                 if (!feature.geometry.coordinates[0].length) continue; // not actually on this tile
+               } // Generate some unique IDs and add some metadata

 
 

-           context.background()
-               .on('change.backgroundOffset-update', updateValue);

 
 

-           return section;
-       }
+               var featurehash = utilHashcode(fastJsonStableStringify(feature));
+               var propertyhash = utilHashcode(fastJsonStableStringify(feature.properties || {}));
+               feature.__layerID__ = layerID.replace(/[^_a-zA-Z0-9\-]/g, '_');
+               feature.__featurehash__ = featurehash;
+               feature.__propertyhash__ = propertyhash;
+               features.push(feature); // Clipped Polygons at same zoom with identical properties can get merged

 
 

-       function uiSectionOverlayList(context) {
+               if (isClipped && geometry.type === 'MultiPolygon') {
+                 var merged = mergeCache[propertyhash];

 
 

-           var section = uiSection('overlay-list', context)
-               .title(_t('background.overlays'))
-               .disclosureContent(renderDisclosureContent);
+                 if (merged && merged.length) {
+                   var other = merged[0];
+                   var coords = index.union(feature.geometry.coordinates, other.geometry.coordinates);

 
 

-           var _overlayList = select(null);
+                   if (!coords || !coords.length) {
+                     continue; // something failed in polygon union
+                   }

 
 

-           function setTooltips(selection) {
-               selection.each(function(d, i, nodes) {
-                   var item = select(this).select('label');
-                   var span = item.select('span');
-                   var placement = (i < nodes.length / 2) ? 'bottom' : 'top';
-                   var description = d.description();
-                   var isOverflowing = (span.property('clientWidth') !== span.property('scrollWidth'));
+                   merged.push(feature);

 
 

-                   item.call(uiTooltip().destroyAny);
+                   for (var j = 0; j < merged.length; j++) {
+                     // all these features get...
+                     merged[j].geometry.coordinates = coords; // same coords

 
 

-                   if (description || isOverflowing) {
-                       item.call(uiTooltip()
-                           .placement(placement)
-                           .title(description || d.name())
-                       );
+                     merged[j].__featurehash__ = featurehash; // same hash, so deduplication works

                    }
                    }

-               });
-           }
-
-           function updateLayerSelections(selection) {
-               function active(d) {
-                   return context.background().showsLayer(d);
+                 } else {
+                   mergeCache[propertyhash] = [feature];
+                 }

                }
                }

-
-               selection.selectAll('li')
-                   .classed('active', active)
-                   .call(setTooltips)
-                   .selectAll('input')
-                   .property('checked', active);
+             }

            }
            }

+         });
+         return features;
+       }

 
 

-
-           function chooseOverlay(d) {
-               event.preventDefault();
-               context.background().toggleOverlayLayer(d);
-               _overlayList.call(updateLayerSelections);
-               document.activeElement.blur();
+       function loadTile(source, tile) {
+         if (source.loaded[tile.id] || source.inflight[tile.id]) return;
+         var url = source.template.replace('{x}', tile.xyz[0]).replace('{y}', tile.xyz[1]) // TMS-flipped y coordinate
+         .replace(/\{[t-]y\}/, Math.pow(2, tile.xyz[2]) - tile.xyz[1] - 1).replace(/\{z(oom)?\}/, tile.xyz[2]).replace(/\{switch:([^}]+)\}/, function (s, r) {
+           var subdomains = r.split(',');
+           return subdomains[(tile.xyz[0] + tile.xyz[1]) % subdomains.length];
+         });
+         var controller = new AbortController();
+         source.inflight[tile.id] = controller;
+         fetch(url, {
+           signal: controller.signal
+         }).then(function (response) {
+           if (!response.ok) {
+             throw new Error(response.status + ' ' + response.statusText);

            }
 
            }
 

-           function drawListItems(layerList, type, change, filter) {
-               var sources = context.background()
-                   .sources(context.map().extent(), context.map().zoom(), true)
-                   .filter(filter);
-
-               var layerLinks = layerList.selectAll('li')
-                   .data(sources, function(d) { return d.name(); });
+           source.loaded[tile.id] = [];
+           delete source.inflight[tile.id];
+           return response.arrayBuffer();
+         }).then(function (data) {
+           if (!data) {
+             throw new Error('No Data');
+           }

 
 

-               layerLinks.exit()
-                   .remove();
+           var z = tile.xyz[2];

 
 

-               var enter = layerLinks.enter()
-                   .append('li');
+           if (!source.canMerge[z]) {
+             source.canMerge[z] = {}; // initialize mergeCache
+           }

 
 

-               var label = enter
-                   .append('label');
+           source.loaded[tile.id] = vtToGeoJSON(data, tile, source.canMerge[z]);
+           dispatch.call('loadedData');
+         })["catch"](function () {
+           source.loaded[tile.id] = [];
+           delete source.inflight[tile.id];
+         });
+       }

 
 

-               label
-                   .append('input')
-                   .attr('type', type)
-                   .attr('name', 'layers')
-                   .on('change', change);
+       var serviceVectorTile = {
+         init: function init() {
+           if (!_vtCache) {
+             this.reset();
+           }

 
 

-               label
-                   .append('span')
-                   .text(function(d) { return d.name(); });
+           this.event = utilRebind(this, dispatch, 'on');
+         },
+         reset: function reset() {
+           for (var sourceID in _vtCache) {
+             var source = _vtCache[sourceID];

 
 

+             if (source && source.inflight) {
+               Object.values(source.inflight).forEach(abortRequest);
+             }
+           }

 
 

-               layerList.selectAll('li')
-                   .sort(sortSources);
+           _vtCache = {};
+         },
+         addSource: function addSource(sourceID, template) {
+           _vtCache[sourceID] = {
+             template: template,
+             inflight: {},
+             loaded: {},
+             canMerge: {}
+           };
+           return _vtCache[sourceID];
+         },
+         data: function data(sourceID, projection) {
+           var source = _vtCache[sourceID];
+           if (!source) return [];
+           var tiles = tiler.getTiles(projection);
+           var seen = {};
+           var results = [];

 
 

-               layerList
-                   .call(updateLayerSelections);
+           for (var i = 0; i < tiles.length; i++) {
+             var features = source.loaded[tiles[i].id];
+             if (!features || !features.length) continue;

 
 

+             for (var j = 0; j < features.length; j++) {
+               var feature = features[j];
+               var hash = feature.__featurehash__;
+               if (seen[hash]) continue;
+               seen[hash] = true; // return a shallow copy, because the hash may change
+               // later if this feature gets merged with another

 
 

-               function sortSources(a, b) {
-                   return a.best() && !b.best() ? -1
-                       : b.best() && !a.best() ? 1
-                       : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
-               }
+               results.push(Object.assign({}, feature)); // shallow copy
+             }

            }
 
            }
 

-           function renderDisclosureContent(selection) {
-
-               var container = selection.selectAll('.layer-overlay-list')
-                   .data([0]);
-
-               _overlayList = container.enter()
-                   .append('ul')
-                   .attr('class', 'layer-list layer-overlay-list')
-                   .attr('dir', 'auto')
-                   .merge(container);
+           return results;
+         },
+         loadTiles: function loadTiles(sourceID, template, projection) {
+           var source = _vtCache[sourceID];

 
 

-               _overlayList
-                   .call(drawListItems, 'checkbox', chooseOverlay, function(d) { return !d.isHidden() && d.overlay; });
+           if (!source) {
+             source = this.addSource(sourceID, template);

            }
 
            }
 

-           context.map()
-               .on('move.overlay_list',
-                   debounce(function() {
-                       // layers in-view may have changed due to map move
-                       window.requestIdleCallback(section.reRender);
-                   }, 1000)
-               );
+           var tiles = tiler.getTiles(projection); // abort inflight requests that are no longer needed

 
 

-           return section;
-       }
+           Object.keys(source.inflight).forEach(function (k) {
+             var wanted = tiles.find(function (tile) {
+               return k === tile.id;
+             });

 
 

-       function uiPaneBackground(context) {
+             if (!wanted) {
+               abortRequest(source.inflight[k]);
+               delete source.inflight[k];
+             }
+           });
+           tiles.forEach(function (tile) {
+             loadTile(source, tile);
+           });
+         },
+         cache: function cache() {
+           return _vtCache;
+         }
+       };

 
 

-           var backgroundPane = uiPane('background', context)
-               .key(_t('background.key'))
-               .title(_t('background.title'))
-               .description(_t('background.description'))
-               .iconName('iD-icon-layers')
-               .sections([
-                   uiSectionBackgroundList(context),
-                   uiSectionOverlayList(context),
-                   uiSectionBackgroundDisplayOptions(context),
-                   uiSectionBackgroundOffset(context)
-               ]);
+       var apibase = 'https://www.wikidata.org/w/api.php?';
+       var _wikidataCache = {};
+       var serviceWikidata = {
+         init: function init() {},
+         reset: function reset() {
+           _wikidataCache = {};
+         },
+         // Search for Wikidata items matching the query
+         itemsForSearchQuery: function itemsForSearchQuery(query, callback) {
+           if (!query) {
+             if (callback) callback('No query', {});
+             return;
+           }

 
 

-           return backgroundPane;
-       }
+           var lang = this.languagesToQuery()[0];
+           var url = apibase + utilQsString({
+             action: 'wbsearchentities',
+             format: 'json',
+             formatversion: 2,
+             search: query,
+             type: 'item',
+             // the language to search
+             language: lang,
+             // the language for the label and description in the result
+             uselang: lang,
+             limit: 10,
+             origin: '*'
+           });
+           d3_json(url).then(function (result) {
+             if (result && result.error) {
+               throw new Error(result.error);
+             }

 
 

-       function uiPaneHelp(context) {
+             if (callback) callback(null, result.search || {});
+           })["catch"](function (err) {
+             if (callback) callback(err.message, {});
+           });
+         },
+         // Given a Wikipedia language and article title,
+         // return an array of corresponding Wikidata entities.
+         itemsByTitle: function itemsByTitle(lang, title, callback) {
+           if (!title) {
+             if (callback) callback('No title', {});
+             return;
+           }

 
 

-           var docKeys = [
-               ['help', [
-                   'welcome',
-                   'open_data_h',
-                   'open_data',
-                   'before_start_h',
-                   'before_start',
-                   'open_source_h',
-                   'open_source',
-                   'open_source_help'
-               ]],
-               ['overview', [
-                   'navigation_h',
-                   'navigation_drag',
-                   'navigation_zoom',
-                   'features_h',
-                   'features',
-                   'nodes_ways'
-               ]],
-               ['editing', [
-                   'select_h',
-                   'select_left_click',
-                   'select_right_click',
-                   'select_space',
-                   'multiselect_h',
-                   'multiselect',
-                   'multiselect_shift_click',
-                   'multiselect_lasso',
-                   'undo_redo_h',
-                   'undo_redo',
-                   'save_h',
-                   'save',
-                   'save_validation',
-                   'upload_h',
-                   'upload',
-                   'backups_h',
-                   'backups',
-                   'keyboard_h',
-                   'keyboard'
-               ]],
-               ['feature_editor', [
-                   'intro',
-                   'definitions',
-                   'type_h',
-                   'type',
-                   'type_picker',
-                   'fields_h',
-                   'fields_all_fields',
-                   'fields_example',
-                   'fields_add_field',
-                   'tags_h',
-                   'tags_all_tags',
-                   'tags_resources'
-               ]],
-               ['points', [
-                   'intro',
-                   'add_point_h',
-                   'add_point',
-                   'add_point_finish',
-                   'move_point_h',
-                   'move_point',
-                   'delete_point_h',
-                   'delete_point',
-                   'delete_point_command'
-               ]],
-               ['lines', [
-                   'intro',
-                   'add_line_h',
-                   'add_line',
-                   'add_line_draw',
-                   'add_line_continue',
-                   'add_line_finish',
-                   'modify_line_h',
-                   'modify_line_dragnode',
-                   'modify_line_addnode',
-                   'connect_line_h',
-                   'connect_line',
-                   'connect_line_display',
-                   'connect_line_drag',
-                   'connect_line_tag',
-                   'disconnect_line_h',
-                   'disconnect_line_command',
-                   'move_line_h',
-                   'move_line_command',
-                   'move_line_connected',
-                   'delete_line_h',
-                   'delete_line',
-                   'delete_line_command'
-               ]],
-               ['areas', [
-                   'intro',
-                   'point_or_area_h',
-                   'point_or_area',
-                   'add_area_h',
-                   'add_area_command',
-                   'add_area_draw',
-                   'add_area_continue',
-                   'add_area_finish',
-                   'square_area_h',
-                   'square_area_command',
-                   'modify_area_h',
-                   'modify_area_dragnode',
-                   'modify_area_addnode',
-                   'delete_area_h',
-                   'delete_area',
-                   'delete_area_command'
-               ]],
-               ['relations', [
-                   'intro',
-                   'edit_relation_h',
-                   'edit_relation',
-                   'edit_relation_add',
-                   'edit_relation_delete',
-                   'maintain_relation_h',
-                   'maintain_relation',
-                   'relation_types_h',
-                   'multipolygon_h',
-                   'multipolygon',
-                   'multipolygon_create',
-                   'multipolygon_merge',
-                   'turn_restriction_h',
-                   'turn_restriction',
-                   'turn_restriction_field',
-                   'turn_restriction_editing',
-                   'route_h',
-                   'route',
-                   'route_add',
-                   'boundary_h',
-                   'boundary',
-                   'boundary_add'
-               ]],
-               ['notes', [
-                   'intro',
-                   'add_note_h',
-                   'add_note',
-                   'place_note',
-                   'move_note',
-                   'update_note_h',
-                   'update_note',
-                   'save_note_h',
-                   'save_note'
-               ]],
-               ['imagery', [
-                   'intro',
-                   'sources_h',
-                   'choosing',
-                   'sources',
-                   'offsets_h',
-                   'offset',
-                   'offset_change'
-               ]],
-               ['streetlevel', [
-                   'intro',
-                   'using_h',
-                   'using',
-                   'photos',
-                   'viewer'
-               ]],
-               ['gps', [
-                   'intro',
-                   'survey',
-                   'using_h',
-                   'using',
-                   'tracing',
-                   'upload'
-               ]],
-               ['qa', [
-                   'intro',
-                   'tools_h',
-                   'tools',
-                   'issues_h',
-                   'issues'
-               ]]
-           ];
+           lang = lang || 'en';
+           var url = apibase + utilQsString({
+             action: 'wbgetentities',
+             format: 'json',
+             formatversion: 2,
+             sites: lang.replace(/-/g, '_') + 'wiki',
+             titles: title,
+             languages: 'en',
+             // shrink response by filtering to one language
+             origin: '*'
+           });
+           d3_json(url).then(function (result) {
+             if (result && result.error) {
+               throw new Error(result.error);
+             }

 
 

-           var headings = {
-               'help.help.open_data_h': 3,
-               'help.help.before_start_h': 3,
-               'help.help.open_source_h': 3,
-               'help.overview.navigation_h': 3,
-               'help.overview.features_h': 3,
-               'help.editing.select_h': 3,
-               'help.editing.multiselect_h': 3,
-               'help.editing.undo_redo_h': 3,
-               'help.editing.save_h': 3,
-               'help.editing.upload_h': 3,
-               'help.editing.backups_h': 3,
-               'help.editing.keyboard_h': 3,
-               'help.feature_editor.type_h': 3,
-               'help.feature_editor.fields_h': 3,
-               'help.feature_editor.tags_h': 3,
-               'help.points.add_point_h': 3,
-               'help.points.move_point_h': 3,
-               'help.points.delete_point_h': 3,
-               'help.lines.add_line_h': 3,
-               'help.lines.modify_line_h': 3,
-               'help.lines.connect_line_h': 3,
-               'help.lines.disconnect_line_h': 3,
-               'help.lines.move_line_h': 3,
-               'help.lines.delete_line_h': 3,
-               'help.areas.point_or_area_h': 3,
-               'help.areas.add_area_h': 3,
-               'help.areas.square_area_h': 3,
-               'help.areas.modify_area_h': 3,
-               'help.areas.delete_area_h': 3,
-               'help.relations.edit_relation_h': 3,
-               'help.relations.maintain_relation_h': 3,
-               'help.relations.relation_types_h': 2,
-               'help.relations.multipolygon_h': 3,
-               'help.relations.turn_restriction_h': 3,
-               'help.relations.route_h': 3,
-               'help.relations.boundary_h': 3,
-               'help.notes.add_note_h': 3,
-               'help.notes.update_note_h': 3,
-               'help.notes.save_note_h': 3,
-               'help.imagery.sources_h': 3,
-               'help.imagery.offsets_h': 3,
-               'help.streetlevel.using_h': 3,
-               'help.gps.using_h': 3,
-               'help.qa.tools_h': 3,
-               'help.qa.issues_h': 3
-           };
+             if (callback) callback(null, result.entities || {});
+           })["catch"](function (err) {
+             if (callback) callback(err.message, {});
+           });
+         },
+         languagesToQuery: function languagesToQuery() {
+           return _mainLocalizer.localeCodes().map(function (code) {
+             return code.toLowerCase();
+           }).filter(function (code) {
+             // HACK: en-us isn't a wikidata language. We should really be filtering by
+             // the languages known to be supported by wikidata.
+             return code !== 'en-us';
+           });
+         },
+         entityByQID: function entityByQID(qid, callback) {
+           if (!qid) {
+             callback('No qid', {});
+             return;
+           }

 
 

-           // For each section, squash all the texts into a single markdown document
-           var docs = docKeys.map(function(key) {
-               var helpkey = 'help.' + key[0];
-               var helpPaneReplacements = { version: context.version };
-               var text = key[1].reduce(function(all, part) {
-                   var subkey = helpkey + '.' + part;
-                   var depth = headings[subkey];                              // is this subkey a heading?
-                   var hhh = depth ? Array(depth + 1).join('#') + ' ' : '';   // if so, prepend with some ##'s
-                   return all + hhh + helpString(subkey, helpPaneReplacements) + '\n\n';
-               }, '');
+           if (_wikidataCache[qid]) {
+             if (callback) callback(null, _wikidataCache[qid]);
+             return;
+           }

 
 

-               return {
-                   title: _t(helpkey + '.title'),
-                   html: marked_1(text.trim())
-                       // use keyboard key styling for shortcuts
-                       .replace(/<code>/g, '<kbd>')
-                       .replace(/<\/code>/g, '<\/kbd>')
-               };
+           var langs = this.languagesToQuery();
+           var url = apibase + utilQsString({
+             action: 'wbgetentities',
+             format: 'json',
+             formatversion: 2,
+             ids: qid,
+             props: 'labels|descriptions|claims|sitelinks',
+             sitefilter: langs.map(function (d) {
+               return d + 'wiki';
+             }).join('|'),
+             languages: langs.join('|'),
+             languagefallback: 1,
+             origin: '*'

            });
            });

+           d3_json(url).then(function (result) {
+             if (result && result.error) {
+               throw new Error(result.error);
+             }

 
 

-           var helpPane = uiPane('help', context)
-               .key(_t('help.key'))
-               .title(_t('help.title'))
-               .description(_t('help.title'))
-               .iconName('iD-icon-help');
+             if (callback) callback(null, result.entities[qid] || {});
+           })["catch"](function (err) {
+             if (callback) callback(err.message, {});
+           });
+         },
+         // Pass `params` object of the form:
+         // {
+         //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+         // }
+         //
+         // Get an result object used to display tag documentation
+         // {
+         //   title:        'string',
+         //   description:  'string',
+         //   editURL:      'string',
+         //   imageURL:     'string',
+         //   wiki:         { title: 'string', text: 'string', url: 'string' }
+         // }
+         //
+         getDocs: function getDocs(params, callback) {
+           var langs = this.languagesToQuery();
+           this.entityByQID(params.qid, function (err, entity) {
+             if (err || !entity) {
+               callback(err || 'No entity');
+               return;
+             }

 
 

-           helpPane.renderContent = function(content) {
+             var i;
+             var description;

 
 

-               function clickHelp(d, i) {
-                   var rtl = (_mainLocalizer.textDirection() === 'rtl');
-                   content.property('scrollTop', 0);
-                   helpPane.selection().select('.pane-heading h2').html(d.title);
+             for (i in langs) {
+               var code = langs[i];

 
 

-                   body.html(d.html);
-                   body.selectAll('a')
-                       .attr('target', '_blank');
-                   menuItems.classed('selected', function(m) {
-                       return m.title === d.title;
-                   });
+               if (entity.descriptions[code] && entity.descriptions[code].language === code) {
+                 description = entity.descriptions[code];
+                 break;
+               }
+             }

 
 

-                   nav.html('');
-                   if (rtl) {
-                       nav.call(drawNext).call(drawPrevious);
-                   } else {
-                       nav.call(drawPrevious).call(drawNext);
-                   }
+             if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result

 
 

+             var result = {
+               title: entity.id,
+               description: description ? description.value : '',
+               descriptionLocaleCode: description ? description.language : '',
+               editURL: 'https://www.wikidata.org/wiki/' + entity.id
+             }; // add image

 
 

-                   function drawNext(selection) {
-                       if (i < docs.length - 1) {
-                           var nextLink = selection
-                               .append('a')
-                               .attr('class', 'next')
-                               .on('click', function() {
-                                   clickHelp(docs[i + 1], i + 1);
-                               });
+             if (entity.claims) {
+               var imageroot = 'https://commons.wikimedia.org/w/index.php';
+               var props = ['P154', 'P18']; // logo image, image

 
 

-                           nextLink
-                               .append('span')
-                               .text(docs[i + 1].title)
-                               .call(svgIcon((rtl ? '#iD-icon-backward' : '#iD-icon-forward'), 'inline'));
-                       }
-                   }
+               var prop, image;

 
 

+               for (i = 0; i < props.length; i++) {
+                 prop = entity.claims[props[i]];

 
 

-                   function drawPrevious(selection) {
-                       if (i > 0) {
-                           var prevLink = selection
-                               .append('a')
-                               .attr('class', 'previous')
-                               .on('click', function() {
-                                   clickHelp(docs[i - 1], i - 1);
-                               });
+                 if (prop && Object.keys(prop).length > 0) {
+                   image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;

 
 

-                           prevLink
-                               .call(svgIcon((rtl ? '#iD-icon-forward' : '#iD-icon-backward'), 'inline'))
-                               .append('span')
-                               .text(docs[i - 1].title);
-                       }
+                   if (image) {
+                     result.imageURL = imageroot + '?' + utilQsString({
+                       title: 'Special:Redirect/file/' + image,
+                       width: 400
+                     });
+                     break;

                    }
                    }

+                 }

                }
                }

+             }

 
 

+             if (entity.sitelinks) {
+               var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en'; // must be one of these that we requested..

 
 

-               function clickWalkthrough() {
-                   if (context.inIntro()) { return; }
-                   context.container().call(uiIntro(context));
-                   context.ui().togglePanes();
-               }
+               for (i = 0; i < langs.length; i++) {
+                 // check each, in order of preference
+                 var w = langs[i] + 'wiki';

 
 

+                 if (entity.sitelinks[w]) {
+                   var title = entity.sitelinks[w].title;
+                   var tKey = 'inspector.wiki_reference';
+
+                   if (!englishLocale && langs[i] === 'en') {
+                     // user's locale isn't English but
+                     tKey = 'inspector.wiki_en_reference'; // we are sending them to enwiki anyway..
+                   }

 
 

-               function clickShortcuts() {
-                   context.container().call(uiShortcuts(context), true);
+                   result.wiki = {
+                     title: title,
+                     text: tKey,
+                     url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
+                   };
+                   break;
+                 }

                }
                }

+             }

 
 

-               var toc = content
-                   .append('ul')
-                   .attr('class', 'toc');
+             callback(null, result);
+           });
+         }
+       };

 
 

-               var menuItems = toc.selectAll('li')
-                   .data(docs)
-                   .enter()
-                   .append('li')
-                   .append('a')
-                   .html(function(d) { return d.title; })
-                   .on('click', clickHelp);
-
-               var shortcuts = toc
-                   .append('li')
-                   .attr('class', 'shortcuts')
-                   .call(uiTooltip()
-                       .title(_t('shortcuts.tooltip'))
-                       .keys(['?'])
-                       .placement('top')
-                   )
-                   .append('a')
-                   .on('click', clickShortcuts);
+       var endpoint = 'https://en.wikipedia.org/w/api.php?';
+       var serviceWikipedia = {
+         init: function init() {},
+         reset: function reset() {},
+         search: function search(lang, query, callback) {
+           if (!query) {
+             if (callback) callback('No Query', []);
+             return;
+           }

 
 

-               shortcuts
-                   .append('div')
-                   .text(_t('shortcuts.title'));
+           lang = lang || 'en';
+           var url = endpoint.replace('en', lang) + utilQsString({
+             action: 'query',
+             list: 'search',
+             srlimit: '10',
+             srinfo: 'suggestion',
+             format: 'json',
+             origin: '*',
+             srsearch: query
+           });
+           d3_json(url).then(function (result) {
+             if (result && result.error) {
+               throw new Error(result.error);
+             } else if (!result || !result.query || !result.query.search) {
+               throw new Error('No Results');
+             }

 
 

-               var walkthrough = toc
-                   .append('li')
-                   .attr('class', 'walkthrough')
-                   .append('a')
-                   .on('click', clickWalkthrough);
+             if (callback) {
+               var titles = result.query.search.map(function (d) {
+                 return d.title;
+               });
+               callback(null, titles);
+             }
+           })["catch"](function (err) {
+             if (callback) callback(err, []);
+           });
+         },
+         suggestions: function suggestions(lang, query, callback) {
+           if (!query) {
+             if (callback) callback('', []);
+             return;
+           }

 
 

-               walkthrough
-                   .append('svg')
-                   .attr('class', 'logo logo-walkthrough')
-                   .append('use')
-                   .attr('xlink:href', '#iD-logo-walkthrough');
+           lang = lang || 'en';
+           var url = endpoint.replace('en', lang) + utilQsString({
+             action: 'opensearch',
+             namespace: 0,
+             suggest: '',
+             format: 'json',
+             origin: '*',
+             search: query
+           });
+           d3_json(url).then(function (result) {
+             if (result && result.error) {
+               throw new Error(result.error);
+             } else if (!result || result.length < 2) {
+               throw new Error('No Results');
+             }

 
 

-               walkthrough
-                   .append('div')
-                   .text(_t('splash.walkthrough'));
+             if (callback) callback(null, result[1] || []);
+           })["catch"](function (err) {
+             if (callback) callback(err.message, []);
+           });
+         },
+         translations: function translations(lang, title, callback) {
+           if (!title) {
+             if (callback) callback('No Title');
+             return;
+           }

 
 

+           var url = endpoint.replace('en', lang) + utilQsString({
+             action: 'query',
+             prop: 'langlinks',
+             format: 'json',
+             origin: '*',
+             lllimit: 500,
+             titles: title
+           });
+           d3_json(url).then(function (result) {
+             if (result && result.error) {
+               throw new Error(result.error);
+             } else if (!result || !result.query || !result.query.pages) {
+               throw new Error('No Results');
+             }

 
 

-               var helpContent = content
-                   .append('div')
-                   .attr('class', 'left-content');
+             if (callback) {
+               var list = result.query.pages[Object.keys(result.query.pages)[0]];
+               var translations = {};

 
 

-               var body = helpContent
-                   .append('div')
-                   .attr('class', 'body');
+               if (list && list.langlinks) {
+                 list.langlinks.forEach(function (d) {
+                   translations[d.lang] = d['*'];
+                 });
+               }

 
 

-               var nav = helpContent
-                   .append('div')
-                   .attr('class', 'nav');
+               callback(null, translations);
+             }
+           })["catch"](function (err) {
+             if (callback) callback(err.message);
+           });
+         }
+       };

 
 

-               clickHelp(docs[0], 0);
+       var services = {
+         geocoder: serviceNominatim,
+         keepRight: serviceKeepRight,
+         improveOSM: serviceImproveOSM,
+         osmose: serviceOsmose,
+         mapillary: serviceMapillary,
+         nsi: serviceNsi,
+         openstreetcam: serviceOpenstreetcam,
+         osm: serviceOsm,
+         osmWikibase: serviceOsmWikibase,
+         maprules: serviceMapRules,
+         streetside: serviceStreetside,
+         taginfo: serviceTaginfo,
+         vectorTile: serviceVectorTile,
+         wikidata: serviceWikidata,
+         wikipedia: serviceWikipedia
+       };

 
 

-           };
+       function modeDragNote(context) {
+         var mode = {
+           id: 'drag-note',
+           button: 'browse'
+         };
+         var edit = behaviorEdit(context);

 
 

-           return helpPane;
-       }
+         var _nudgeInterval;

 
 

-       function uiSectionValidationIssues(id, severity, context) {
+         var _lastLoc;

 
 

-           var _issues = [];
+         var _note; // most current note.. dragged note may have stale datum.

 
 

-           var section = uiSection(id, context)
-               .title(function() {
-                   if (!_issues) { return ''; }
-                   var issueCountText = _issues.length > 1000 ? '1000+' : String(_issues.length);
-                   return _t('issues.' + severity + 's.list_title', { count: issueCountText });
-               })
-               .disclosureContent(renderDisclosureContent)
-               .shouldDisplay(function() {
-                   return _issues && _issues.length;
-               });

 
 

-           function getOptions() {
-               return {
-                   what: corePreferences('validate-what') || 'edited',
-                   where: corePreferences('validate-where') || 'all'
-               };
-           }
+         function startNudge(d3_event, nudge) {
+           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+           _nudgeInterval = window.setInterval(function () {
+             context.map().pan(nudge);
+             doMove(d3_event, nudge);
+           }, 50);
+         }

 
 

-           // get and cache the issues to display, unordered
-           function reloadIssues() {
-               _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
+         function stopNudge() {
+           if (_nudgeInterval) {
+             window.clearInterval(_nudgeInterval);
+             _nudgeInterval = null;

            }
            }

+         }

 
 

-           function renderDisclosureContent(selection) {
+         function origin(note) {
+           return context.projection(note.loc);
+         }

 
 

-               var center = context.map().center();
-               var graph = context.graph();
+         function start(d3_event, note) {
+           _note = note;
+           var osm = services.osm;

 
 

-               // sort issues by distance away from the center of the map
-               var issues = _issues.map(function withDistance(issue) {
-                       var extent = issue.extent(graph);
-                       var dist = extent ? geoSphericalDistance(center, extent.center()) : 0;
-                       return Object.assign(issue, { dist: dist });
-                   })
-                   .sort(function byDistance(a, b) {
-                       return a.dist - b.dist;
-                   });
+           if (osm) {
+             // Get latest note from cache.. The marker may have a stale datum bound to it
+             // and dragging it around can sometimes delete the users note comment.
+             _note = osm.getNote(_note.id);
+           }

 
 

-               // cut off at 1000
-               issues = issues.slice(0, 1000);
+           context.surface().selectAll('.note-' + _note.id).classed('active', true);
+           context.perform(actionNoop());
+           context.enter(mode);
+           context.selectedNoteID(_note.id);
+         }

 
 

-               //renderIgnoredIssuesReset(_warningsSelection);
+         function move(d3_event, entity, point) {
+           d3_event.stopPropagation();
+           _lastLoc = context.projection.invert(point);
+           doMove(d3_event);
+           var nudge = geoViewportEdge(point, context.map().dimensions());

 
 

-               selection
-                   .call(drawIssuesList, issues);
+           if (nudge) {
+             startNudge(d3_event, nudge);
+           } else {
+             stopNudge();

            }
            }

+         }

 
 

-           function drawIssuesList(selection, issues) {
-               var list = selection.selectAll('.issues-list')
-                   .data([0]);
+         function doMove(d3_event, nudge) {
+           nudge = nudge || [0, 0];
+           var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
+           var currMouse = geoVecSubtract(currPoint, nudge);
+           var loc = context.projection.invert(currMouse);
+           _note = _note.move(loc);
+           var osm = services.osm;

 
 

-               list = list.enter()
-                   .append('ul')
-                   .attr('class', 'layer-list issues-list ' + severity + 's-list')
-                   .merge(list);
+           if (osm) {
+             osm.replaceNote(_note); // update note cache
+           }

 
 

+           context.replace(actionNoop()); // trigger redraw
+         }

 
 

-               var items = list.selectAll('li')
-                   .data(issues, function(d) { return d.id; });
+         function end() {
+           context.replace(actionNoop()); // trigger redraw

 
 

-               // Exit
-               items.exit()
-                   .remove();
+           context.selectedNoteID(_note.id).enter(modeSelectNote(context, _note.id));
+         }

 
 

-               // Enter
-               var itemsEnter = items.enter()
-                   .append('li')
-                   .attr('class', function (d) { return 'issue severity-' + d.severity; })
-                   .on('click', function(d) {
-                       context.validator().focusIssue(d);
-                   })
-                   .on('mouseover', function(d) {
-                       utilHighlightEntities(d.entityIds, true, context);
-                   })
-                   .on('mouseout', function(d) {
-                       utilHighlightEntities(d.entityIds, false, context);
-                   });
+         var drag = behaviorDrag().selector('.layer-touch.markers .target.note.new').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);

 
 

+         mode.enter = function () {
+           context.install(edit);
+         };

 
 

-               var labelsEnter = itemsEnter
-                   .append('div')
-                   .attr('class', 'issue-label');
-
-               var textEnter = labelsEnter
-                   .append('span')
-                   .attr('class', 'issue-text');
-
-               textEnter
-                   .append('span')
-                   .attr('class', 'issue-icon')
-                   .each(function(d) {
-                       var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
-                       select(this)
-                           .call(svgIcon(iconName));
-                   });
+         mode.exit = function () {
+           context.ui().sidebar.hover.cancel();
+           context.uninstall(edit);
+           context.surface().selectAll('.active').classed('active', false);
+           stopNudge();
+         };

 
 

-               textEnter
-                   .append('span')
-                   .attr('class', 'issue-message');
+         mode.behavior = drag;
+         return mode;
+       }

 
 

-               /*
-               labelsEnter
-                   .append('span')
-                   .attr('class', 'issue-autofix')
-                   .each(function(d) {
-                       if (!d.autoFix) return;
-
-                       d3_select(this)
-                           .append('button')
-                           .attr('title', t('issues.fix_one.title'))
-                           .datum(d.autoFix)  // set button datum to the autofix
-                           .attr('class', 'autofix action')
-                           .on('click', function(d) {
-                               d3_event.preventDefault();
-                               d3_event.stopPropagation();
-
-                               var issuesEntityIDs = d.issue.entityIds;
-                               utilHighlightEntities(issuesEntityIDs.concat(d.entityIds), false, context);
-
-                               context.perform.apply(context, d.autoArgs);
-                               context.validator().validate();
-                           })
-                           .call(svgIcon('#iD-icon-wrench'));
-                   });
-               */
+       function modeSelectData(context, selectedDatum) {
+         var mode = {
+           id: 'select-data',
+           button: 'browse'
+         };
+         var keybinding = utilKeybinding('select-data');
+         var dataEditor = uiDataEditor(context);
+         var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior]; // class the data as selected, or return to browse mode if the data is gone

 
 

-               // Update
-               items = items
-                   .merge(itemsEnter)
-                   .order();
+         function selectData(d3_event, drawn) {
+           var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);

 
 

-               items.selectAll('.issue-message')
-                   .text(function(d) {
-                       return d.message(context);
-                   });
+           if (selection.empty()) {
+             // Return to browse mode if selected DOM elements have
+             // disappeared because the user moved them out of view..
+             var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;

 
 

-               /*
-               // autofix
-               var canAutoFix = issues.filter(function(issue) { return issue.autoFix; });
-
-               var autoFixAll = selection.selectAll('.autofix-all')
-                   .data(canAutoFix.length ? [0] : []);
-
-               // exit
-               autoFixAll.exit()
-                   .remove();
-
-               // enter
-               var autoFixAllEnter = autoFixAll.enter()
-                   .insert('div', '.issues-list')
-                   .attr('class', 'autofix-all');
-
-               var linkEnter = autoFixAllEnter
-                   .append('a')
-                   .attr('class', 'autofix-all-link')
-                   .attr('href', '#');
-
-               linkEnter
-                   .append('span')
-                   .attr('class', 'autofix-all-link-text')
-                   .text(t('issues.fix_all.title'));
-
-               linkEnter
-                   .append('span')
-                   .attr('class', 'autofix-all-link-icon')
-                   .call(svgIcon('#iD-icon-wrench'));
-
-               if (severity === 'warning') {
-                   renderIgnoredIssuesReset(selection);
-               }
-
-               // update
-               autoFixAll = autoFixAll
-                   .merge(autoFixAllEnter);
-
-               autoFixAll.selectAll('.autofix-all-link')
-                   .on('click', function() {
-                       context.pauseChangeDispatch();
-                       context.perform(actionNoop());
-                       canAutoFix.forEach(function(issue) {
-                           var args = issue.autoFix.autoArgs.slice();  // copy
-                           if (typeof args[args.length - 1] !== 'function') {
-                               args.pop();
-                           }
-                           args.push(t('issues.fix_all.annotation'));
-                           context.replace.apply(context, args);
-                       });
-                       context.resumeChangeDispatch();
-                       context.validator().validate();
-                   });
-               */
+             if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+               context.enter(modeBrowse(context));
+             }
+           } else {
+             selection.classed('selected', true);

            }
            }

+         }

 
 

-           context.validator().on('validated.uiSectionValidationIssues' + id, function() {
-               window.requestIdleCallback(function() {
-                   reloadIssues();
-                   section.reRender();
-               });
-           });
+         function esc() {
+           if (context.container().select('.combobox').size()) return;
+           context.enter(modeBrowse(context));
+         }

 
 

-           context.map().on('move.uiSectionValidationIssues' + id,
-               debounce(function() {
-                   window.requestIdleCallback(function() {
-                       if (getOptions().where === 'visible') {
-                           // must refetch issues if they are viewport-dependent
-                           reloadIssues();
-                       }
-                       // always reload list to re-sort-by-distance
-                       section.reRender();
-                   });
-               }, 1000)
-           );
+         mode.zoomToSelected = function () {
+           var extent = geoExtent(d3_geoBounds(selectedDatum));
+           context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
+         };

 
 

-           return section;
-       }
+         mode.enter = function () {
+           behaviors.forEach(context.install);
+           keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+           select(document).call(keybinding);
+           selectData();
+           var sidebar = context.ui().sidebar;
+           sidebar.show(dataEditor.datum(selectedDatum)); // expand the sidebar, avoid obscuring the data if needed

 
 

-       function uiSectionValidationOptions(context) {
+           var extent = geoExtent(d3_geoBounds(selectedDatum));
+           sidebar.expand(sidebar.intersects(extent));
+           context.map().on('drawn.select-data', selectData);
+         };

 
 

-           var section = uiSection('issues-options', context)
-               .content(renderContent);
+         mode.exit = function () {
+           behaviors.forEach(context.uninstall);
+           select(document).call(keybinding.unbind);
+           context.surface().selectAll('.layer-mapdata .selected').classed('selected hover', false);
+           context.map().on('drawn.select-data', null);
+           context.ui().sidebar.hide();
+         };

 
 

-           function renderContent(selection) {
+         return mode;
+       }

 
 

-               var container = selection.selectAll('.issues-options-container')
-                   .data([0]);
+       function behaviorSelect(context) {
+         var _tolerancePx = 4; // see also behaviorDrag

 
 

-               container = container.enter()
-                   .append('div')
-                   .attr('class', 'issues-options-container')
-                   .merge(container);
+         var _lastMouseEvent = null;
+         var _showMenu = false;
+         var _downPointers = {};
+         var _longPressTimeout = null;
+         var _lastInteractionType = null; // the id of the down pointer that's enabling multiselection while down

 
 

-               var data = [
-                   { key: 'what', values: ['edited', 'all'] },
-                   { key: 'where', values: ['visible', 'all'] }
-               ];
+         var _multiselectionPointerId = null; // use pointer events on supported platforms; fallback to mouse events

 
 

-               var options = container.selectAll('.issues-option')
-                   .data(data, function(d) { return d.key; });
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

 
 

-               var optionsEnter = options.enter()
-                   .append('div')
-                   .attr('class', function(d) { return 'issues-option issues-option-' + d.key; });
+         function keydown(d3_event) {
+           if (d3_event.keyCode === 32) {
+             // don't react to spacebar events during text input
+             var activeNode = document.activeElement;
+             if (activeNode && new Set(['INPUT', 'TEXTAREA']).has(activeNode.nodeName)) return;
+           }

 
 

-               optionsEnter
-                   .append('div')
-                   .attr('class', 'issues-option-title')
-                   .text(function(d) { return _t('issues.options.' + d.key + '.title'); });
+           if (d3_event.keyCode === 93 || // context menu key
+           d3_event.keyCode === 32) {
+             // spacebar
+             d3_event.preventDefault();
+           }

 
 

-               var valuesEnter = optionsEnter.selectAll('label')
-                   .data(function(d) {
-                       return d.values.map(function(val) { return { value: val, key: d.key }; });
-                   })
-                   .enter()
-                   .append('label');
+           if (d3_event.repeat) return; // ignore repeated events for held keys
+           // if any key is pressed the user is probably doing something other than long-pressing

 
 

-               valuesEnter
-                   .append('input')
-                   .attr('type', 'radio')
-                   .attr('name', function(d) { return 'issues-option-' + d.key; })
-                   .attr('value', function(d) { return d.value; })
-                   .property('checked', function(d) { return getOptions()[d.key] === d.value; })
-                   .on('change', function(d) { updateOptionValue(d.key, d.value); });
+           cancelLongPress();

 
 

-               valuesEnter
-                   .append('span')
-                   .text(function(d) { return _t('issues.options.' + d.key + '.' + d.value); });
+           if (d3_event.shiftKey) {
+             context.surface().classed('behavior-multiselect', true);

            }
 
            }
 

-           function getOptions() {
-               return {
-                   what: corePreferences('validate-what') || 'edited',  // 'all', 'edited'
-                   where: corePreferences('validate-where') || 'all'    // 'all', 'visible'
+           if (d3_event.keyCode === 32) {
+             // spacebar
+             if (!_downPointers.spacebar && _lastMouseEvent) {
+               cancelLongPress();
+               _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
+               _downPointers.spacebar = {
+                 firstEvent: _lastMouseEvent,
+                 lastEvent: _lastMouseEvent

                };
                };

+             }

            }
            }

+         }

 
 

-           function updateOptionValue(d, val) {
-               if (!val && event && event.target) {
-                   val = event.target.value;
-               }
-
-               corePreferences('validate-' + d, val);
-               context.validator().validate();
-           }
-
-           return section;
-       }
-
-       function uiSectionValidationRules(context) {
-
-           var MINSQUARE = 0;
-           var MAXSQUARE = 20;
-           var DEFAULTSQUARE = 5;  // see also unsquare_way.js
-
-           var section = uiSection('issues-rules', context)
-               .disclosureContent(renderDisclosureContent)
-               .title(_t('issues.rules.title'));
-
-           var _ruleKeys = context.validator().getRuleKeys()
-               .filter(function(key) { return key !== 'maprules'; })
-               .sort(function(key1, key2) {
-                   // alphabetize by localized title
-                   return _t('issues.' + key1 + '.title') < _t('issues.' + key2 + '.title') ? -1 : 1;
-               });
-
-           function renderDisclosureContent(selection) {
-               var container = selection.selectAll('.issues-rulelist-container')
-                   .data([0]);
-
-               var containerEnter = container.enter()
-                   .append('div')
-                   .attr('class', 'issues-rulelist-container');
-
-               containerEnter
-                   .append('ul')
-                   .attr('class', 'layer-list issue-rules-list');
-
-               var ruleLinks = containerEnter
-                   .append('div')
-                   .attr('class', 'issue-rules-links section-footer');
-
-               ruleLinks
-                   .append('a')
-                   .attr('class', 'issue-rules-link')
-                   .attr('href', '#')
-                   .text(_t('issues.enable_all'))
-                   .on('click', function() {
-                       context.validator().disableRules([]);
-                   });
-
-               ruleLinks
-                   .append('a')
-                   .attr('class', 'issue-rules-link')
-                   .attr('href', '#')
-                   .text(_t('issues.disable_all'))
-                   .on('click', function() {
-                       context.validator().disableRules(_ruleKeys);
-                   });
-
-
-               // Update
-               container = container
-                   .merge(containerEnter);
+         function keyup(d3_event) {
+           cancelLongPress();

 
 

-               container.selectAll('.issue-rules-list')
-                   .call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
+           if (!d3_event.shiftKey) {
+             context.surface().classed('behavior-multiselect', false);

            }
 
            }
 

-           function drawListItems(selection, data, type, name, change, active) {
-               var items = selection.selectAll('li')
-                   .data(data);
-
-               // Exit
-               items.exit()
-                   .remove();
-
-               // Enter
-               var enter = items.enter()
-                   .append('li');
-
-               if (name === 'rule') {
-                   enter
-                       .call(uiTooltip()
-                           .title(function(d) { return _t('issues.' + d + '.tip'); })
-                           .placement('top')
-                       );
-               }
-
-               var label = enter
-                   .append('label');
-
-               label
-                   .append('input')
-                   .attr('type', type)
-                   .attr('name', name)
-                   .on('change', change);
-
-               label
-                   .append('span')
-                   .html(function(d) {
-                       var params = {};
-                       if (d === 'unsquare_way') {
-                           params.val = '<span class="square-degrees"></span>';
-                       }
-                       return _t('issues.' + d + '.title', params);
-                   });
+           if (d3_event.keyCode === 93) {
+             // context menu key
+             d3_event.preventDefault();
+             _lastInteractionType = 'menukey';
+             contextmenu(d3_event);
+           } else if (d3_event.keyCode === 32) {
+             // spacebar
+             var pointer = _downPointers.spacebar;

 
 

-               // Update
-               items = items
-                   .merge(enter);
-
-               items
-                   .classed('active', active)
-                   .selectAll('input')
-                   .property('checked', active)
-                   .property('indeterminate', false);
-
-
-               // user-configurable square threshold
-               var degStr = corePreferences('validate-square-degrees');
-               if (degStr === null) {
-                   degStr = '' + DEFAULTSQUARE;
-               }
-
-               var span = items.selectAll('.square-degrees');
-               var input = span.selectAll('.square-degrees-input')
-                   .data([0]);
-
-               // enter / update
-               input.enter()
-                   .append('input')
-                   .attr('type', 'number')
-                   .attr('min', '' + MINSQUARE)
-                   .attr('max', '' + MAXSQUARE)
-                   .attr('step', '0.5')
-                   .attr('class', 'square-degrees-input')
-                   .call(utilNoAuto)
-                   .on('click', function () {
-                       event.preventDefault();
-                       event.stopPropagation();
-                       this.select();
-                   })
-                   .on('keyup', function () {
-                       if (event.keyCode === 13) { // enter
-                           this.blur();
-                           this.select();
-                       }
-                   })
-                   .on('blur', changeSquare)
-                   .merge(input)
-                   .property('value', degStr);
+             if (pointer) {
+               delete _downPointers.spacebar;
+               if (pointer.done) return;
+               d3_event.preventDefault();
+               _lastInteractionType = 'spacebar';
+               click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
+             }

            }
            }

+         }

 
 

-           function changeSquare() {
-               var input = select(this);
-               var degStr = utilGetSetValue(input).trim();
-               var degNum = parseFloat(degStr, 10);
+         function pointerdown(d3_event) {
+           var id = (d3_event.pointerId || 'mouse').toString();
+           cancelLongPress();
+           if (d3_event.buttons && d3_event.buttons !== 1) return;
+           context.ui().closeEditMenu();
+           _longPressTimeout = window.setTimeout(didLongPress, 500, id, 'longdown-' + (d3_event.pointerType || 'mouse'));
+           _downPointers[id] = {
+             firstEvent: d3_event,
+             lastEvent: d3_event
+           };
+         }

 
 

-               if (!isFinite(degNum)) {
-                   degNum = DEFAULTSQUARE;
-               } else if (degNum > MAXSQUARE) {
-                   degNum = MAXSQUARE;
-               } else if (degNum < MINSQUARE) {
-                   degNum = MINSQUARE;
-               }
+         function didLongPress(id, interactionType) {
+           var pointer = _downPointers[id];
+           if (!pointer) return;

 
 

-               degNum = Math.round(degNum * 10 ) / 10;   // round to 1 decimal
-               degStr = '' + degNum;
+           for (var i in _downPointers) {
+             // don't allow this or any currently down pointer to trigger another click
+             _downPointers[i].done = true;
+           } // treat long presses like right-clicks

 
 

-               input
-                   .property('value', degStr);

 
 

-               corePreferences('validate-square-degrees', degStr);
-               context.validator().reloadUnsquareIssues();
-           }
+           _longPressTimeout = null;
+           _lastInteractionType = interactionType;
+           _showMenu = true;
+           click(pointer.firstEvent, pointer.lastEvent, id);
+         }

 
 

-           function isRuleEnabled(d) {
-               return context.validator().isRuleEnabled(d);
-           }
+         function pointermove(d3_event) {
+           var id = (d3_event.pointerId || 'mouse').toString();

 
 

-           function toggleRule(d) {
-               context.validator().toggleRule(d);
+           if (_downPointers[id]) {
+             _downPointers[id].lastEvent = d3_event;

            }
 
            }
 

-           context.validator().on('validated.uiSectionValidationRules', function() {
-               window.requestIdleCallback(section.reRender);
-           });
-
-           return section;
-       }
+           if (!d3_event.pointerType || d3_event.pointerType === 'mouse') {
+             _lastMouseEvent = d3_event;

 
 

-       function uiSectionValidationStatus(context) {
+             if (_downPointers.spacebar) {
+               _downPointers.spacebar.lastEvent = d3_event;
+             }
+           }
+         }

 
 

-           var section = uiSection('issues-status', context)
-               .content(renderContent)
-               .shouldDisplay(function() {
-                   var issues = context.validator().getIssues(getOptions());
-                   return issues.length === 0;
-               });
+         function pointerup(d3_event) {
+           var id = (d3_event.pointerId || 'mouse').toString();
+           var pointer = _downPointers[id];
+           if (!pointer) return;
+           delete _downPointers[id];

 
 

-           function getOptions() {
-               return {
-                   what: corePreferences('validate-what') || 'edited',
-                   where: corePreferences('validate-where') || 'all'
-               };
+           if (_multiselectionPointerId === id) {
+             _multiselectionPointerId = null;

            }
 
            }
 

-           function renderContent(selection) {
+           if (pointer.done) return;
+           click(pointer.firstEvent, d3_event, id);
+         }

 
 

-               var box = selection.selectAll('.box')
-                   .data([0]);
+         function pointercancel(d3_event) {
+           var id = (d3_event.pointerId || 'mouse').toString();
+           if (!_downPointers[id]) return;
+           delete _downPointers[id];

 
 

-               var boxEnter = box.enter()
-                   .append('div')
-                   .attr('class', 'box');
+           if (_multiselectionPointerId === id) {
+             _multiselectionPointerId = null;
+           }
+         }

 
 

-               boxEnter
-                   .append('div')
-                   .call(svgIcon('#iD-icon-apply', 'pre-text'));
+         function contextmenu(d3_event) {
+           d3_event.preventDefault();

 
 

-               var noIssuesMessage = boxEnter
-                   .append('span');
+           if (!+d3_event.clientX && !+d3_event.clientY) {
+             if (_lastMouseEvent) {
+               d3_event.sourceEvent = _lastMouseEvent;
+             } else {
+               return;
+             }
+           } else {
+             _lastMouseEvent = d3_event;
+             _lastInteractionType = 'rightclick';
+           }

 
 

-               noIssuesMessage
-                   .append('strong')
-                   .attr('class', 'message');
+           _showMenu = true;
+           click(d3_event, d3_event);
+         }

 
 

-               noIssuesMessage
-                   .append('br');
+         function click(firstEvent, lastEvent, pointerId) {
+           cancelLongPress();
+           var mapNode = context.container().select('.main-map').node(); // Use the `main-map` coordinate system since the surface and supersurface
+           // are transformed when drag-panning.

 
 

-               noIssuesMessage
-                   .append('span')
-                   .attr('class', 'details');
+           var pointGetter = utilFastMouse(mapNode);
+           var p1 = pointGetter(firstEvent);
+           var p2 = pointGetter(lastEvent);
+           var dist = geoVecLength(p1, p2);

 
 

-               renderIgnoredIssuesReset(selection);
-               setNoIssuesText(selection);
+           if (dist > _tolerancePx || !mapContains(lastEvent)) {
+             resetProperties();
+             return;

            }
 
            }
 

-           function renderIgnoredIssuesReset(selection) {
-
-               var ignoredIssues = context.validator()
-                   .getIssues({ what: 'all', where: 'all', includeDisabledRules: true, includeIgnored: 'only' });
+           var targetDatum = lastEvent.target.__data__;
+           var multiselectEntityId;

 
 

-               var resetIgnored = selection.selectAll('.reset-ignored')
-                   .data(ignoredIssues.length ? [0] : []);
+           if (!_multiselectionPointerId) {
+             // If a different pointer than the one triggering this click is down on a
+             // feature, treat this and all future clicks as multiselection until that
+             // pointer is raised.
+             var selectPointerInfo = pointerDownOnSelection(pointerId);

 
 

-               // exit
-               resetIgnored.exit()
-                   .remove();
+             if (selectPointerInfo) {
+               _multiselectionPointerId = selectPointerInfo.pointerId; // if the other feature isn't selected yet, make sure we select it

 
 

-               // enter
-               var resetIgnoredEnter = resetIgnored.enter()
-                   .append('div')
-                   .attr('class', 'reset-ignored section-footer');
+               multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
+               _downPointers[selectPointerInfo.pointerId].done = true;
+             }
+           } // support multiselect if data is already selected

 
 

-               resetIgnoredEnter
-                   .append('a')
-                   .attr('href', '#');

 
 

-               // update
-               resetIgnored = resetIgnored
-                   .merge(resetIgnoredEnter);
+           var isMultiselect = context.mode().id === 'select' && ( // and shift key is down
+           lastEvent && lastEvent.shiftKey || // or we're lasso-selecting
+           context.surface().select('.lasso').node() || // or a pointer is down over a selected feature
+           _multiselectionPointerId && !multiselectEntityId);

 
 

-               resetIgnored.select('a')
-                   .text(_t('issues.reset_ignored', { count: ignoredIssues.length.toString() }));
+           processClick(targetDatum, isMultiselect, p2, multiselectEntityId);

 
 

-               resetIgnored.on('click', function() {
-                   context.validator().resetIgnoredIssues();
-               });
+           function mapContains(event) {
+             var rect = mapNode.getBoundingClientRect();
+             return event.clientX >= rect.left && event.clientX <= rect.right && event.clientY >= rect.top && event.clientY <= rect.bottom;

            }
 
            }
 

-           function setNoIssuesText(selection) {
+           function pointerDownOnSelection(skipPointerId) {
+             var mode = context.mode();
+             var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];

 
 

-               var opts = getOptions();
+             for (var pointerId in _downPointers) {
+               if (pointerId === 'spacebar' || pointerId === skipPointerId) continue;
+               var pointerInfo = _downPointers[pointerId];
+               var p1 = pointGetter(pointerInfo.firstEvent);
+               var p2 = pointGetter(pointerInfo.lastEvent);
+               if (geoVecLength(p1, p2) > _tolerancePx) continue;
+               var datum = pointerInfo.firstEvent.target.__data__;
+               var entity = datum && datum.properties && datum.properties.entity || datum;

 
 

-               function checkForHiddenIssues(cases) {
-                   for (var type in cases) {
-                       var hiddenOpts = cases[type];
-                       var hiddenIssues = context.validator().getIssues(hiddenOpts);
-                       if (hiddenIssues.length) {
-                           selection.select('.box .details')
-                               .text(_t(
-                                   'issues.no_issues.hidden_issues.' + type,
-                                   { count: hiddenIssues.length.toString() }
-                               ));
-                           return;
-                       }
-                   }
-                   selection.select('.box .details')
-                       .text(_t('issues.no_issues.hidden_issues.none'));
+               if (context.graph().hasEntity(entity.id)) {
+                 return {
+                   pointerId: pointerId,
+                   entityId: entity.id,
+                   selected: selectedIDs.indexOf(entity.id) !== -1
+                 };

                }
                }

+             }

 
 

-               var messageType;
+             return null;
+           }
+         }

 
 

-               if (opts.what === 'edited' && opts.where === 'visible') {
+         function processClick(datum, isMultiselect, point, alsoSelectId) {
+           var mode = context.mode();
+           var showMenu = _showMenu;
+           var interactionType = _lastInteractionType;
+           var entity = datum && datum.properties && datum.properties.entity;
+           if (entity) datum = entity;

 
 

-                   messageType = 'edits_in_view';
+           if (datum && datum.type === 'midpoint') {
+             // treat targeting midpoints as if targeting the parent way
+             datum = datum.parents[0];
+           }

 
 

-                   checkForHiddenIssues({
-                       elsewhere: { what: 'edited', where: 'all' },
-                       everything_else: { what: 'all', where: 'visible' },
-                       disabled_rules: { what: 'edited', where: 'visible', includeDisabledRules: 'only' },
-                       everything_else_elsewhere: { what: 'all', where: 'all' },
-                       disabled_rules_elsewhere: { what: 'edited', where: 'all', includeDisabledRules: 'only' },
-                       ignored_issues: { what: 'edited', where: 'visible', includeIgnored: 'only' },
-                       ignored_issues_elsewhere: { what: 'edited', where: 'all', includeIgnored: 'only' }
-                   });
+           var newMode;

 
 

-               } else if (opts.what === 'edited' && opts.where === 'all') {
+           if (datum instanceof osmEntity) {
+             // targeting an entity
+             var selectedIDs = context.selectedIDs();
+             context.selectedNoteID(null);
+             context.selectedErrorID(null);

 
 

-                   messageType = 'edits';
+             if (!isMultiselect) {
+               // don't change the selection if we're toggling the menu atop a multiselection
+               if (!showMenu || selectedIDs.length <= 1 || selectedIDs.indexOf(datum.id) === -1) {
+                 if (alsoSelectId === datum.id) alsoSelectId = null;
+                 selectedIDs = (alsoSelectId ? [alsoSelectId] : []).concat([datum.id]); // always enter modeSelect even if the entity is already
+                 // selected since listeners may expect `context.enter` events,
+                 // e.g. in the walkthrough

 
 

-                   checkForHiddenIssues({
-                       everything_else: { what: 'all', where: 'all' },
-                       disabled_rules: { what: 'edited', where: 'all', includeDisabledRules: 'only' },
-                       ignored_issues: { what: 'edited', where: 'all', includeIgnored: 'only' }
+                 newMode = mode.id === 'select' ? mode.selectedIDs(selectedIDs) : modeSelect(context, selectedIDs).selectBehavior(behavior);
+                 context.enter(newMode);
+               }
+             } else {
+               if (selectedIDs.indexOf(datum.id) !== -1) {
+                 // clicked entity is already in the selectedIDs list..
+                 if (!showMenu) {
+                   // deselect clicked entity, then reenter select mode or return to browse mode..
+                   selectedIDs = selectedIDs.filter(function (id) {
+                     return id !== datum.id;

                    });
                    });

+                   newMode = selectedIDs.length ? mode.selectedIDs(selectedIDs) : modeBrowse(context).selectBehavior(behavior);
+                   context.enter(newMode);
+                 }
+               } else {
+                 // clicked entity is not in the selected list, add it..
+                 selectedIDs = selectedIDs.concat([datum.id]);
+                 newMode = mode.selectedIDs(selectedIDs);
+                 context.enter(newMode);
+               }
+             }
+           } else if (datum && datum.__featurehash__ && !isMultiselect) {
+             // targeting custom data
+             context.selectedNoteID(null).enter(modeSelectData(context, datum));
+           } else if (datum instanceof osmNote && !isMultiselect) {
+             // targeting a note
+             context.selectedNoteID(datum.id).enter(modeSelectNote(context, datum.id));
+           } else if (datum instanceof QAItem & !isMultiselect) {
+             // targeting an external QA issue
+             context.selectedErrorID(datum.id).enter(modeSelectError(context, datum.id, datum.service));
+           } else {
+             // targeting nothing
+             context.selectedNoteID(null);
+             context.selectedErrorID(null);

 
 

-               } else if (opts.what === 'all' && opts.where === 'visible') {
-
-                   messageType = 'everything_in_view';
-
-                   checkForHiddenIssues({
-                       elsewhere: { what: 'all', where: 'all' },
-                       disabled_rules: { what: 'all', where: 'visible', includeDisabledRules: 'only' },
-                       disabled_rules_elsewhere: { what: 'all', where: 'all', includeDisabledRules: 'only' },
-                       ignored_issues: { what: 'all', where: 'visible', includeIgnored: 'only' },
-                       ignored_issues_elsewhere: { what: 'all', where: 'all', includeIgnored: 'only' }
-                   });
-               } else if (opts.what === 'all' && opts.where === 'all') {
+             if (!isMultiselect && mode.id !== 'browse') {
+               context.enter(modeBrowse(context));
+             }
+           }

 
 

-                   messageType = 'everything';
+           context.ui().closeEditMenu(); // always request to show the edit menu in case the mode needs it

 
 

-                   checkForHiddenIssues({
-                       disabled_rules: { what: 'all', where: 'all', includeDisabledRules: 'only' },
-                       ignored_issues: { what: 'all', where: 'all', includeIgnored: 'only' }
-                   });
-               }
+           if (showMenu) context.ui().showEditMenu(point, interactionType);
+           resetProperties();
+         }

 
 

-               if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
-                   messageType = 'no_edits';
-               }
+         function cancelLongPress() {
+           if (_longPressTimeout) window.clearTimeout(_longPressTimeout);
+           _longPressTimeout = null;
+         }

 
 

-               selection.select('.box .message')
-                   .text(_t('issues.no_issues.message.' + messageType));
+         function resetProperties() {
+           cancelLongPress();
+           _showMenu = false;
+           _lastInteractionType = null; // don't reset _lastMouseEvent since it might still be useful
+         }

 
 

-           }
+         function behavior(selection) {
+           resetProperties();
+           _lastMouseEvent = context.map().lastPointerEvent();
+           select(window).on('keydown.select', keydown).on('keyup.select', keyup).on(_pointerPrefix + 'move.select', pointermove, true).on(_pointerPrefix + 'up.select', pointerup, true).on('pointercancel.select', pointercancel, true).on('contextmenu.select-window', function (d3_event) {
+             // Edge and IE really like to show the contextmenu on the
+             // menubar when user presses a keyboard menu button
+             // even after we've already preventdefaulted the key event.
+             var e = d3_event;

 
 

-           context.validator().on('validated.uiSectionValidationStatus', function() {
-               window.requestIdleCallback(section.reRender);
+             if (+e.clientX === 0 && +e.clientY === 0) {
+               d3_event.preventDefault();
+             }

            });
            });

+           selection.on(_pointerPrefix + 'down.select', pointerdown).on('contextmenu.select', contextmenu);
+           /*if (d3_event && d3_event.shiftKey) {
+               context.surface()
+                   .classed('behavior-multiselect', true);
+           }*/
+         }

 
 

-           context.map().on('move.uiSectionValidationStatus',
-               debounce(function() {
-                   window.requestIdleCallback(section.reRender);
-               }, 1000)
-           );
+         behavior.off = function (selection) {
+           cancelLongPress();
+           select(window).on('keydown.select', null).on('keyup.select', null).on('contextmenu.select-window', null).on(_pointerPrefix + 'move.select', null, true).on(_pointerPrefix + 'up.select', null, true).on('pointercancel.select', null, true);
+           selection.on(_pointerPrefix + 'down.select', null).on('contextmenu.select', null);
+           context.surface().classed('behavior-multiselect', false);
+         };

 
 

-           return section;
+         return behavior;

        }
 
        }
 

-       function uiPaneIssues(context) {
-
-           var issuesPane = uiPane('issues', context)
-               .key(_t('issues.key'))
-               .title(_t('issues.title'))
-               .description(_t('issues.title'))
-               .iconName('iD-icon-alert')
-               .sections([
-                   uiSectionValidationOptions(context),
-                   uiSectionValidationStatus(context),
-                   uiSectionValidationIssues('issues-errors', 'error', context),
-                   uiSectionValidationIssues('issues-warnings', 'warning', context),
-                   uiSectionValidationRules(context)
-               ]);
+       function operationContinue(context, selectedIDs) {
+         var _entities = selectedIDs.map(function (id) {
+           return context.graph().entity(id);
+         });

 
 

-           return issuesPane;
-       }
+         var _geometries = Object.assign({
+           line: [],
+           vertex: []
+         }, utilArrayGroupBy(_entities, function (entity) {
+           return entity.geometry(context.graph());
+         }));

 
 

-       function uiSettingsCustomData(context) {
-           var dispatch$1 = dispatch('change');
+         var _vertex = _geometries.vertex.length && _geometries.vertex[0];

 
 

-           function render(selection) {
-               var dataLayer = context.layers().layer('data');
+         function candidateWays() {
+           return _vertex ? context.graph().parentWays(_vertex).filter(function (parent) {
+             return parent.geometry(context.graph()) === 'line' && !parent.isClosed() && parent.affix(_vertex.id) && (_geometries.line.length === 0 || _geometries.line[0] === parent);
+           }) : [];
+         }

 
 

-               // keep separate copies of original and current settings
-               var _origSettings = {
-                   fileList: (dataLayer && dataLayer.fileList()) || null,
-                   url: corePreferences('settings-custom-data-url')
-               };
-               var _currSettings = {
-                   fileList: (dataLayer && dataLayer.fileList()) || null,
-                   url: corePreferences('settings-custom-data-url')
-               };
+         var _candidates = candidateWays();

 
 

-               // var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
-               var modal = uiConfirm(selection).okButton();
+         var operation = function operation() {
+           var candidate = _candidates[0];
+           context.enter(modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(_vertex.id), true));
+         };

 
 

-               modal
-                   .classed('settings-modal settings-custom-data', true);
+         operation.relatedEntityIds = function () {
+           return _candidates.length ? [_candidates[0].id] : [];
+         };

 
 

-               modal.select('.modal-section.header')
-                   .append('h3')
-                   .text(_t('settings.custom_data.header'));
+         operation.available = function () {
+           return _geometries.vertex.length === 1 && _geometries.line.length <= 1 && !context.features().hasHiddenConnections(_vertex, context.graph());
+         };

 
 

+         operation.disabled = function () {
+           if (_candidates.length === 0) {
+             return 'not_eligible';
+           } else if (_candidates.length > 1) {
+             return 'multiple';
+           }

 
 

-               var textSection = modal.select('.modal-section.message-text');
+           return false;
+         };

 
 

-               textSection
-                   .append('pre')
-                   .attr('class', 'instructions-file')
-                   .text(_t('settings.custom_data.file.instructions'));
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.continue.' + disable) : _t('operations.continue.description');
+         };

 
 

-               textSection
-                   .append('input')
-                   .attr('class', 'field-file')
-                   .attr('type', 'file')
-                   .property('files', _currSettings.fileList)  // works for all except IE11
-                   .on('change', function() {
-                       var files = event.target.files;
-                       if (files && files.length) {
-                           _currSettings.url = '';
-                           textSection.select('.field-url').property('value', '');
-                           _currSettings.fileList = files;
-                       } else {
-                           _currSettings.fileList = null;
-                       }
-                   });
+         operation.annotation = function () {
+           return _t('operations.continue.annotation.line');
+         };

 
 

-               textSection
-                   .append('h4')
-                   .text(_t('settings.custom_data.or'));
+         operation.id = 'continue';
+         operation.keys = [_t('operations.continue.key')];
+         operation.title = _t('operations.continue.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }

 
 

-               textSection
-                   .append('pre')
-                   .attr('class', 'instructions-url')
-                   .text(_t('settings.custom_data.url.instructions'));
+       function operationCopy(context, selectedIDs) {
+         function getFilteredIdsToCopy() {
+           return selectedIDs.filter(function (selectedID) {
+             var entity = context.graph().hasEntity(selectedID); // don't copy untagged vertices separately from ways

 
 

-               textSection
-                   .append('textarea')
-                   .attr('class', 'field-url')
-                   .attr('placeholder', _t('settings.custom_data.url.placeholder'))
-                   .call(utilNoAuto)
-                   .property('value', _currSettings.url);
+             return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
+           });
+         }

 
 

+         var operation = function operation() {
+           var graph = context.graph();
+           var selected = groupEntities(getFilteredIdsToCopy(), graph);
+           var canCopy = [];
+           var skip = {};
+           var entity;
+           var i;

 
 

-               // insert a cancel button
-               var buttonSection = modal.select('.modal-section.buttons');
+           for (i = 0; i < selected.relation.length; i++) {
+             entity = selected.relation[i];

 
 

-               buttonSection
-                   .insert('button', '.ok-button')
-                   .attr('class', 'button cancel-button secondary-action')
-                   .text(_t('confirm.cancel'));
+             if (!skip[entity.id] && entity.isComplete(graph)) {
+               canCopy.push(entity.id);
+               skip = getDescendants(entity.id, graph, skip);
+             }
+           }

 
 

+           for (i = 0; i < selected.way.length; i++) {
+             entity = selected.way[i];

 
 

-               buttonSection.select('.cancel-button')
-                   .on('click.cancel', clickCancel);
+             if (!skip[entity.id]) {
+               canCopy.push(entity.id);
+               skip = getDescendants(entity.id, graph, skip);
+             }
+           }

 
 

-               buttonSection.select('.ok-button')
-                   .attr('disabled', isSaveDisabled)
-                   .on('click.save', clickSave);
+           for (i = 0; i < selected.node.length; i++) {
+             entity = selected.node[i];

 
 

+             if (!skip[entity.id]) {
+               canCopy.push(entity.id);
+             }
+           }

 
 

-               function isSaveDisabled() {
-                   return null;
-               }
+           context.copyIDs(canCopy);

 
 

+           if (_point && (canCopy.length !== 1 || graph.entity(canCopy[0]).type !== 'node')) {
+             // store the anchor coordinates if copying more than a single node
+             context.copyLonLat(context.projection.invert(_point));
+           } else {
+             context.copyLonLat(null);
+           }
+         };

 
 

-               // restore the original url
-               function clickCancel() {
-                   textSection.select('.field-url').property('value', _origSettings.url);
-                   corePreferences('settings-custom-data-url', _origSettings.url);
-                   this.blur();
-                   modal.close();
-               }
+         function groupEntities(ids, graph) {
+           var entities = ids.map(function (id) {
+             return graph.entity(id);
+           });
+           return Object.assign({
+             relation: [],
+             way: [],
+             node: []
+           }, utilArrayGroupBy(entities, 'type'));
+         }

 
 

-               // accept the current url
-               function clickSave() {
-                   _currSettings.url = textSection.select('.field-url').property('value').trim();
+         function getDescendants(id, graph, descendants) {
+           var entity = graph.entity(id);
+           var children;
+           descendants = descendants || {};

 
 

-                   // one or the other but not both
-                   if (_currSettings.url) { _currSettings.fileList = null; }
-                   if (_currSettings.fileList) { _currSettings.url = ''; }
+           if (entity.type === 'relation') {
+             children = entity.members.map(function (m) {
+               return m.id;
+             });
+           } else if (entity.type === 'way') {
+             children = entity.nodes;
+           } else {
+             children = [];
+           }

 
 

-                   corePreferences('settings-custom-data-url', _currSettings.url);
-                   this.blur();
-                   modal.close();
-                   dispatch$1.call('change', this, _currSettings);
-               }
+           for (var i = 0; i < children.length; i++) {
+             if (!descendants[children[i]]) {
+               descendants[children[i]] = true;
+               descendants = getDescendants(children[i], graph, descendants);
+             }

            }
 
            }
 

-           return utilRebind(render, dispatch$1, 'on');
-       }
+           return descendants;
+         }

 
 

-       function uiSectionDataLayers(context) {
+         operation.available = function () {
+           return getFilteredIdsToCopy().length > 0;
+         };

 
 

-           var settingsCustomData = uiSettingsCustomData(context)
-               .on('change', customChanged);
+         operation.disabled = function () {
+           var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());

 
 

-           var layers = context.layers();
+           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           }

 
 

-           var section = uiSection('data-layers', context)
-               .title(_t('map_data.data_layers'))
-               .disclosureContent(renderDisclosureContent);
+           return false;
+         };

 
 

-           function renderDisclosureContent(selection) {
-               var container = selection.selectAll('.data-layer-container')
-                   .data([0]);
+         operation.availableForKeypress = function () {
+           var selection = window.getSelection && window.getSelection(); // if the user has text selected then let them copy that, not the selected feature

 
 

-               container.enter()
-                   .append('div')
-                   .attr('class', 'data-layer-container')
-                   .merge(container)
-                   .call(drawOsmItems)
-                   .call(drawQAItems)
-                   .call(drawCustomDataItems)
-                   .call(drawVectorItems)      // Beta - Detroit mapping challenge
-                   .call(drawPanelItems);
-           }
+           return !selection || !selection.toString();
+         };

 
 

-           function showsLayer(which) {
-               var layer = layers.layer(which);
-               if (layer) {
-                   return layer.enabled();
-               }
-               return false;
-           }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.copy.' + disable, {
+             n: selectedIDs.length
+           }) : _t('operations.copy.description', {
+             n: selectedIDs.length
+           });
+         };

 
 

-           function setLayer(which, enabled) {
-               // Don't allow layer changes while drawing - #6584
-               var mode = context.mode();
-               if (mode && /^draw/.test(mode.id)) { return; }
+         operation.annotation = function () {
+           return _t('operations.copy.annotation', {
+             n: selectedIDs.length
+           });
+         };

 
 

-               var layer = layers.layer(which);
-               if (layer) {
-                   layer.enabled(enabled);
+         var _point;

 
 

-                   if (!enabled && (which === 'osm' || which === 'notes')) {
-                       context.enter(modeBrowse(context));
-                   }
-               }
-           }
+         operation.point = function (val) {
+           _point = val;
+           return operation;
+         };

 
 

-           function toggleLayer(which) {
-               setLayer(which, !showsLayer(which));
-           }
+         operation.id = 'copy';
+         operation.keys = [uiCmd('⌘C')];
+         operation.title = _t('operations.copy.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }

 
 

-           function drawOsmItems(selection) {
-               var osmKeys = ['osm', 'notes'];
-               var osmLayers = layers.all().filter(function(obj) { return osmKeys.indexOf(obj.id) !== -1; });
+       function operationDisconnect(context, selectedIDs) {
+         var _vertexIDs = [];
+         var _wayIDs = [];
+         var _otherIDs = [];
+         var _actions = [];
+         selectedIDs.forEach(function (id) {
+           var entity = context.entity(id);
+
+           if (entity.type === 'way') {
+             _wayIDs.push(id);
+           } else if (entity.geometry(context.graph()) === 'vertex') {
+             _vertexIDs.push(id);
+           } else {
+             _otherIDs.push(id);
+           }
+         });

 
 

-               var ul = selection
-                   .selectAll('.layer-list-osm')
-                   .data([0]);
+         var _coords,
+             _descriptionID = '',
+             _annotationID = 'features';

 
 

-               ul = ul.enter()
-                   .append('ul')
-                   .attr('class', 'layer-list layer-list-osm')
-                   .merge(ul);
+         var _disconnectingVertexIds = [];
+         var _disconnectingWayIds = [];

 
 

-               var li = ul.selectAll('.list-item')
-                   .data(osmLayers);
+         if (_vertexIDs.length > 0) {
+           // At the selected vertices, disconnect the selected ways, if any, else
+           // disconnect all connected ways
+           _disconnectingVertexIds = _vertexIDs;

 
 

-               li.exit()
-                   .remove();
+           _vertexIDs.forEach(function (vertexID) {
+             var action = actionDisconnect(vertexID);

 
 

-               var liEnter = li.enter()
-                   .append('li')
-                   .attr('class', function(d) { return 'list-item list-item-' + d.id; });
+             if (_wayIDs.length > 0) {
+               var waysIDsForVertex = _wayIDs.filter(function (wayID) {
+                 var way = context.entity(wayID);
+                 return way.nodes.indexOf(vertexID) !== -1;
+               });

 
 

-               var labelEnter = liEnter
-                   .append('label')
-                   .each(function(d) {
-                       if (d.id === 'osm') {
-                           select(this)
-                               .call(uiTooltip()
-                                   .title(_t('map_data.layers.' + d.id + '.tooltip'))
-                                   .keys([uiCmd('⌥' + _t('area_fill.wireframe.key'))])
-                                   .placement('bottom')
-                               );
-                       } else {
-                           select(this)
-                               .call(uiTooltip()
-                                   .title(_t('map_data.layers.' + d.id + '.tooltip'))
-                                   .placement('bottom')
-                               );
-                       }
-                   });
+               action.limitWays(waysIDsForVertex);
+             }

 
 

-               labelEnter
-                   .append('input')
-                   .attr('type', 'checkbox')
-                   .on('change', function(d) { toggleLayer(d.id); });
+             _actions.push(action);

 
 

-               labelEnter
-                   .append('span')
-                   .text(function(d) { return _t('map_data.layers.' + d.id + '.title'); });
+             _disconnectingWayIds = _disconnectingWayIds.concat(context.graph().parentWays(context.graph().entity(vertexID)).map(function (d) {
+               return d.id;
+             }));
+           });

 
 

+           _disconnectingWayIds = utilArrayUniq(_disconnectingWayIds).filter(function (id) {
+             return _wayIDs.indexOf(id) === -1;
+           });
+           _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';

 
 

-               // Update
-               li
-                   .merge(liEnter)
-                   .classed('active', function (d) { return d.layer.enabled(); })
-                   .selectAll('input')
-                   .property('checked', function (d) { return d.layer.enabled(); });
+           if (_wayIDs.length === 1) {
+             _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
+           } else {
+             _descriptionID += _wayIDs.length === 0 ? 'no_ways' : 'multiple_ways';

            }
            }

+         } else if (_wayIDs.length > 0) {
+           // Disconnect the selected ways from each other, if they're connected,
+           // else disconnect them from all connected ways
+           var ways = _wayIDs.map(function (id) {
+             return context.entity(id);
+           });

 
 

-           function drawQAItems(selection) {
-               var qaKeys = ['keepRight', 'improveOSM', 'osmose'];
-               var qaLayers = layers.all().filter(function(obj) { return qaKeys.indexOf(obj.id) !== -1; });
+           var nodes = utilGetAllNodes(_wayIDs, context.graph());
+           _coords = nodes.map(function (n) {
+             return n.loc;
+           }); // actions for connected nodes shared by at least two selected ways

 
 

-               var ul = selection
-                   .selectAll('.layer-list-qa')
-                   .data([0]);
+           var sharedActions = [];
+           var sharedNodes = []; // actions for connected nodes

 
 

-               ul = ul.enter()
-                   .append('ul')
-                   .attr('class', 'layer-list layer-list-qa')
-                   .merge(ul);
+           var unsharedActions = [];
+           var unsharedNodes = [];
+           nodes.forEach(function (node) {
+             var action = actionDisconnect(node.id).limitWays(_wayIDs);

 
 

-               var li = ul.selectAll('.list-item')
-                   .data(qaLayers);
+             if (action.disabled(context.graph()) !== 'not_connected') {
+               var count = 0;

 
 

-               li.exit()
-                   .remove();
+               for (var i in ways) {
+                 var way = ways[i];

 
 

-               var liEnter = li.enter()
-                   .append('li')
-                   .attr('class', function(d) { return 'list-item list-item-' + d.id; });
+                 if (way.nodes.indexOf(node.id) !== -1) {
+                   count += 1;
+                 }

 
 

-               var labelEnter = liEnter
-                   .append('label')
-                   .each(function(d) {
-                       select(this)
-                           .call(uiTooltip()
-                               .title(_t('map_data.layers.' + d.id + '.tooltip'))
-                               .placement('bottom')
-                           );
-                   });
+                 if (count > 1) break;
+               }
+
+               if (count > 1) {
+                 sharedActions.push(action);
+                 sharedNodes.push(node);
+               } else {
+                 unsharedActions.push(action);
+                 unsharedNodes.push(node);
+               }
+             }
+           });
+           _descriptionID += 'no_points.';
+           _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';
+
+           if (sharedActions.length) {
+             // if any nodes are shared, only disconnect the selected ways from each other
+             _actions = sharedActions;
+             _disconnectingVertexIds = sharedNodes.map(function (node) {
+               return node.id;
+             });
+             _descriptionID += 'conjoined';
+             _annotationID = 'from_each_other';
+           } else {
+             // if no nodes are shared, disconnect the selected ways from all connected ways
+             _actions = unsharedActions;
+             _disconnectingVertexIds = unsharedNodes.map(function (node) {
+               return node.id;
+             });

 
 

-               labelEnter
-                   .append('input')
-                   .attr('type', 'checkbox')
-                   .on('change', function(d) { toggleLayer(d.id); });
+             if (_wayIDs.length === 1) {
+               _descriptionID += context.graph().geometry(_wayIDs[0]);
+             } else {
+               _descriptionID += 'separate';
+             }
+           }
+         }

 
 

-               labelEnter
-                   .append('span')
-                   .text(function(d) { return _t('map_data.layers.' + d.id + '.title'); });
+         var _extent = utilTotalExtent(_disconnectingVertexIds, context.graph());

 
 

+         var operation = function operation() {
+           context.perform(function (graph) {
+             return _actions.reduce(function (graph, action) {
+               return action(graph);
+             }, graph);
+           }, operation.annotation());
+           context.validator().validate();
+         };

 
 

-               // Update
-               li
-                   .merge(liEnter)
-                   .classed('active', function (d) { return d.layer.enabled(); })
-                   .selectAll('input')
-                   .property('checked', function (d) { return d.layer.enabled(); });
+         operation.relatedEntityIds = function () {
+           if (_vertexIDs.length) {
+             return _disconnectingWayIds;

            }
 
            }
 

-           // Beta feature - sample vector layers to support Detroit Mapping Challenge
-           // https://github.com/osmus/detroit-mapping-challenge
-           function drawVectorItems(selection) {
-               var dataLayer = layers.layer('data');
-               var vtData = [
-                   {
-                       name: 'Detroit Neighborhoods/Parks',
-                       src: 'neighborhoods-parks',
-                       tooltip: 'Neighborhood boundaries and parks as compiled by City of Detroit in concert with community groups.',
-                       template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmur6x34562qp9iv1u3ksf-54hev,jonahadkins.cjksmqxdx33jj2wp90xd9x2md-4e5y2/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-                   }, {
-                       name: 'Detroit Composite POIs',
-                       src: 'composite-poi',
-                       tooltip: 'Fire Inspections, Business Licenses, and other public location data collated from the City of Detroit.',
-                       template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmm6a02sli31myxhsr7zf3-2sw8h/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-                   }, {
-                       name: 'Detroit All-The-Places POIs',
-                       src: 'alltheplaces-poi',
-                       tooltip: 'Public domain business location data created by web scrapers.',
-                       template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmswgk340g2vo06p1w9w0j-8fjjc/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-                   }
-               ];
+           return _disconnectingVertexIds;
+         };

 
 

-               // Only show this if the map is around Detroit..
-               var detroit = geoExtent([-83.5, 42.1], [-82.8, 42.5]);
-               var showVectorItems = (context.map().zoom() > 9 && detroit.contains(context.map().center()));
+         operation.available = function () {
+           if (_actions.length === 0) return false;
+           if (_otherIDs.length !== 0) return false;
+           if (_vertexIDs.length !== 0 && _wayIDs.length !== 0 && !_wayIDs.every(function (wayID) {
+             return _vertexIDs.some(function (vertexID) {
+               var way = context.entity(wayID);
+               return way.nodes.indexOf(vertexID) !== -1;
+             });
+           })) return false;
+           return true;
+         };

 
 

-               var container = selection.selectAll('.vectortile-container')
-                   .data(showVectorItems ? [0] : []);
+         operation.disabled = function () {
+           var reason;

 
 

-               container.exit()
-                   .remove();
+           for (var actionIndex in _actions) {
+             reason = _actions[actionIndex].disabled(context.graph());
+             if (reason) return reason;
+           }

 
 

-               var containerEnter = container.enter()
-                   .append('div')
-                   .attr('class', 'vectortile-container');
+           if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large.' + ((_vertexIDs.length ? _vertexIDs : _wayIDs).length === 1 ? 'single' : 'multiple');
+           } else if (_coords && someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           }

 
 

-               containerEnter
-                   .append('h4')
-                   .attr('class', 'vectortile-header')
-                   .text('Detroit Vector Tiles (Beta)');
+           return false;

 
 

-               containerEnter
-                   .append('ul')
-                   .attr('class', 'layer-list layer-list-vectortile');
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();

 
 

-               containerEnter
-                   .append('div')
-                   .attr('class', 'vectortile-footer')
-                   .append('a')
-                   .attr('target', '_blank')
-                   .attr('tabindex', -1)
-                   .call(svgIcon('#iD-icon-out-link', 'inline'))
-                   .attr('href', 'https://github.com/osmus/detroit-mapping-challenge')
-                   .append('span')
-                   .text('About these layers');
+             if (osm) {
+               var missing = _coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });

 
 

-               container = container
-                   .merge(containerEnter);
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }

 
 

+             return false;
+           }
+         };

 
 

-               var ul = container.selectAll('.layer-list-vectortile');
+         operation.tooltip = function () {
+           var disable = operation.disabled();

 
 

-               var li = ul.selectAll('.list-item')
-                   .data(vtData);
+           if (disable) {
+             return _t('operations.disconnect.' + disable);
+           }

 
 

-               li.exit()
-                   .remove();
+           return _t('operations.disconnect.description.' + _descriptionID);
+         };

 
 

-               var liEnter = li.enter()
-                   .append('li')
-                   .attr('class', function(d) { return 'list-item list-item-' + d.src; });
+         operation.annotation = function () {
+           return _t('operations.disconnect.annotation.' + _annotationID);
+         };

 
 

-               var labelEnter = liEnter
-                   .append('label')
-                   .each(function(d) {
-                       select(this).call(
-                           uiTooltip().title(d.tooltip).placement('top')
-                       );
-                   });
+         operation.id = 'disconnect';
+         operation.keys = [_t('operations.disconnect.key')];
+         operation.title = _t('operations.disconnect.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }

 
 

-               labelEnter
-                   .append('input')
-                   .attr('type', 'radio')
-                   .attr('name', 'vectortile')
-                   .on('change', selectVTLayer);
+       function operationDowngrade(context, selectedIDs) {
+         var _affectedFeatureCount = 0;

 
 

-               labelEnter
-                   .append('span')
-                   .text(function(d) { return d.name; });
+         var _downgradeType = downgradeTypeForEntityIDs(selectedIDs);

 
 

-               // Update
-               li
-                   .merge(liEnter)
-                   .classed('active', isVTLayerSelected)
-                   .selectAll('input')
-                   .property('checked', isVTLayerSelected);
+         var _multi = _affectedFeatureCount === 1 ? 'single' : 'multiple';

 
 

+         function downgradeTypeForEntityIDs(entityIds) {
+           var downgradeType;
+           _affectedFeatureCount = 0;

 
 

-               function isVTLayerSelected(d) {
-                   return dataLayer && dataLayer.template() === d.template;
-               }
+           for (var i in entityIds) {
+             var entityID = entityIds[i];
+             var type = downgradeTypeForEntityID(entityID);

 
 

-               function selectVTLayer(d) {
-                   corePreferences('settings-custom-data-url', d.template);
-                   if (dataLayer) {
-                       dataLayer.template(d.template, d.src);
-                       dataLayer.enabled(true);
-                   }
+             if (type) {
+               _affectedFeatureCount += 1;
+
+               if (downgradeType && type !== downgradeType) {
+                 if (downgradeType !== 'generic' && type !== 'generic') {
+                   downgradeType = 'building_address';
+                 } else {
+                   downgradeType = 'generic';
+                 }
+               } else {
+                 downgradeType = type;

                }
                }

+             }

            }
 
            }
 

-           function drawCustomDataItems(selection) {
-               var dataLayer = layers.layer('data');
-               var hasData = dataLayer && dataLayer.hasData();
-               var showsData = hasData && dataLayer.enabled();
-
-               var ul = selection
-                   .selectAll('.layer-list-data')
-                   .data(dataLayer ? [0] : []);
+           return downgradeType;
+         }

 
 

-               // Exit
-               ul.exit()
-                   .remove();
+         function downgradeTypeForEntityID(entityID) {
+           var graph = context.graph();
+           var entity = graph.entity(entityID);
+           var preset = _mainPresetIndex.match(entity, graph);
+           if (!preset || preset.isFallback()) return null;

 
 

-               // Enter
-               var ulEnter = ul.enter()
-                   .append('ul')
-                   .attr('class', 'layer-list layer-list-data');
+           if (entity.type === 'node' && preset.id !== 'address' && Object.keys(entity.tags).some(function (key) {
+             return key.match(/^addr:.{1,}/);
+           })) {
+             return 'address';
+           }

 
 

-               var liEnter = ulEnter
-                   .append('li')
-                   .attr('class', 'list-item-data');
+           var geometry = entity.geometry(graph);

 
 

-               var labelEnter = liEnter
-                   .append('label')
-                   .call(uiTooltip()
-                       .title(_t('map_data.layers.custom.tooltip'))
-                       .placement('top')
-                   );
+           if (geometry === 'area' && entity.tags.building && !preset.tags.building) {
+             return 'building';
+           }

 
 

-               labelEnter
-                   .append('input')
-                   .attr('type', 'checkbox')
-                   .on('change', function() { toggleLayer('data'); });
+           if (geometry === 'vertex' && Object.keys(entity.tags).length) {
+             return 'generic';
+           }

 
 

-               labelEnter
-                   .append('span')
-                   .text(_t('map_data.layers.custom.title'));
+           return null;
+         }

 
 

-               liEnter
-                   .append('button')
-                   .call(uiTooltip()
-                       .title(_t('settings.custom_data.tooltip'))
-                       .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-                   )
-                   .on('click', editCustom)
-                   .call(svgIcon('#iD-icon-more'));
-
-               liEnter
-                   .append('button')
-                   .call(uiTooltip()
-                       .title(_t('map_data.layers.custom.zoom'))
-                       .placement((_mainLocalizer.textDirection() === 'rtl') ? 'right' : 'left')
-                   )
-                   .on('click', function() {
-                       event.preventDefault();
-                       event.stopPropagation();
-                       dataLayer.fitZoom();
-                   })
-                   .call(svgIcon('#iD-icon-framed-dot'));
+         var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
+         var addressKeysToKeep = ['source'];

 
 

-               // Update
-               ul = ul
-                   .merge(ulEnter);
+         var operation = function operation() {
+           context.perform(function (graph) {
+             for (var i in selectedIDs) {
+               var entityID = selectedIDs[i];
+               var type = downgradeTypeForEntityID(entityID);
+               if (!type) continue;
+               var tags = Object.assign({}, graph.entity(entityID).tags); // shallow copy

 
 

-               ul.selectAll('.list-item-data')
-                   .classed('active', showsData)
-                   .selectAll('label')
-                   .classed('deemphasize', !hasData)
-                   .selectAll('input')
-                   .property('disabled', !hasData)
-                   .property('checked', showsData);
-           }
+               for (var key in tags) {
+                 if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) continue;

 
 

-           function editCustom() {
-               event.preventDefault();
-               context.container()
-                   .call(settingsCustomData);
-           }
+                 if (type === 'building') {
+                   if (buildingKeysToKeep.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+                 }

 
 

-           function customChanged(d) {
-               var dataLayer = layers.layer('data');
+                 if (type !== 'generic') {
+                   if (key.match(/^addr:.{1,}/) || key.match(/^source:.{1,}/)) continue;
+                 }

 
 

-               if (d && d.url) {
-                   dataLayer.url(d.url);
-               } else if (d && d.fileList) {
-                   dataLayer.fileList(d.fileList);
+                 delete tags[key];

                }
                }

-           }

 
 

+               graph = actionChangeTags(entityID, tags)(graph);
+             }

 
 

-           function drawPanelItems(selection) {
+             return graph;
+           }, operation.annotation());
+           context.validator().validate(); // refresh the select mode to enable the delete operation

 
 

-               var panelsListEnter = selection.selectAll('.md-extras-list')
-                   .data([0])
-                   .enter()
-                   .append('ul')
-                   .attr('class', 'layer-list md-extras-list');
-
-               var historyPanelLabelEnter = panelsListEnter
-                   .append('li')
-                   .attr('class', 'history-panel-toggle-item')
-                   .append('label')
-                   .call(uiTooltip()
-                       .title(_t('map_data.history_panel.tooltip'))
-                       .keys([uiCmd('⌘⇧' + _t('info_panels.history.key'))])
-                       .placement('top')
-                   );
-
-               historyPanelLabelEnter
-                   .append('input')
-                   .attr('type', 'checkbox')
-                   .on('change', function() {
-                       event.preventDefault();
-                       context.ui().info.toggle('history');
-                   });
+           context.enter(modeSelect(context, selectedIDs));
+         };

 
 

-               historyPanelLabelEnter
-                   .append('span')
-                   .text(_t('map_data.history_panel.title'));
-
-               var measurementPanelLabelEnter = panelsListEnter
-                   .append('li')
-                   .attr('class', 'measurement-panel-toggle-item')
-                   .append('label')
-                   .call(uiTooltip()
-                       .title(_t('map_data.measurement_panel.tooltip'))
-                       .keys([uiCmd('⌘⇧' + _t('info_panels.measurement.key'))])
-                       .placement('top')
-                   );
-
-               measurementPanelLabelEnter
-                   .append('input')
-                   .attr('type', 'checkbox')
-                   .on('change', function() {
-                       event.preventDefault();
-                       context.ui().info.toggle('measurement');
-                   });
+         operation.available = function () {
+           return _downgradeType;
+         };

 
 

-               measurementPanelLabelEnter
-                   .append('span')
-                   .text(_t('map_data.measurement_panel.title'));
+         operation.disabled = function () {
+           if (selectedIDs.some(hasWikidataTag)) {
+             return 'has_wikidata_tag';

            }
 
            }
 

-           context.layers().on('change.uiSectionDataLayers', section.reRender);
+           return false;

 
 

-           context.map()
-               .on('move.uiSectionDataLayers',
-                   debounce(function() {
-                       // Detroit layers may have moved in or out of view
-                       window.requestIdleCallback(section.reRender);
-                   }, 1000)
-               );
+           function hasWikidataTag(id) {
+             var entity = context.entity(id);
+             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+           }
+         };

 
 

-           return section;
-       }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
+         };

 
 

-       function uiSectionMapFeatures(context) {
+         operation.annotation = function () {
+           var suffix;

 
 

-           var _features = context.features().keys();
+           if (_downgradeType === 'building_address') {
+             suffix = 'generic';
+           } else {
+             suffix = _downgradeType;
+           }

 
 

-           var section = uiSection('map-features', context)
-               .title(_t('map_data.map_features'))
-               .disclosureContent(renderDisclosureContent)
-               .expandedByDefault(false);
+           return _t('operations.downgrade.annotation.' + suffix, {
+             n: _affectedFeatureCount
+           });
+         };

 
 

-           function renderDisclosureContent(selection) {
+         operation.id = 'downgrade';
+         operation.keys = [uiCmd('⌫')];
+         operation.title = _t('operations.downgrade.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }

 
 

-               var container = selection.selectAll('.layer-feature-list-container')
-                   .data([0]);
+       function operationExtract(context, selectedIDs) {
+         var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';

 
 

-               var containerEnter = container.enter()
-                   .append('div')
-                   .attr('class', 'layer-feature-list-container');
+         var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
+           return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
+         }).filter(Boolean));

 
 

-               containerEnter
-                   .append('ul')
-                   .attr('class', 'layer-list layer-feature-list');
+         var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';

 
 

-               var footer = containerEnter
-                   .append('div')
-                   .attr('class', 'feature-list-links section-footer');
-
-               footer
-                   .append('a')
-                   .attr('class', 'feature-list-link')
-                   .attr('href', '#')
-                   .text(_t('issues.enable_all'))
-                   .on('click', function() {
-                       context.features().enableAll();
-                   });
+         var _extent;

 
 

-               footer
-                   .append('a')
-                   .attr('class', 'feature-list-link')
-                   .attr('href', '#')
-                   .text(_t('issues.disable_all'))
-                   .on('click', function() {
-                       context.features().disableAll();
-                   });
+         var _actions = selectedIDs.map(function (entityID) {
+           var graph = context.graph();
+           var entity = graph.hasEntity(entityID);
+           if (!entity || !entity.hasInterestingTags()) return null;
+           if (entity.type === 'node' && graph.parentWays(entity).length === 0) return null;

 
 

-               // Update
-               container = container
-                   .merge(containerEnter);
+           if (entity.type !== 'node') {
+             var preset = _mainPresetIndex.match(entity, graph); // only allow extraction from ways/relations if the preset supports points

 
 

-               container.selectAll('.layer-feature-list')
-                   .call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
+             if (preset.geometry.indexOf('point') === -1) return null;

            }
 
            }
 

-           function drawListItems(selection, data, type, name, change, active) {
-               var items = selection.selectAll('li')
-                   .data(data);
+           _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+           return actionExtract(entityID, context.projection);
+         }).filter(Boolean);

 
 

-               // Exit
-               items.exit()
-                   .remove();
-
-               // Enter
-               var enter = items.enter()
-                   .append('li')
-                   .call(uiTooltip()
-                       .title(function(d) {
-                           var tip = _t(name + '.' + d + '.tooltip');
-                           if (autoHiddenFeature(d)) {
-                               var msg = showsLayer('osm') ? _t('map_data.autohidden') : _t('map_data.osmhidden');
-                               tip += '<div>' + msg + '</div>';
-                           }
-                           return tip;
-                       })
-                       .placement('top')
-                   );
+         var operation = function operation() {
+           var combinedAction = function combinedAction(graph) {
+             _actions.forEach(function (action) {
+               graph = action(graph);
+             });

 
 

-               var label = enter
-                   .append('label');
+             return graph;
+           };

 
 

-               label
-                   .append('input')
-                   .attr('type', type)
-                   .attr('name', name)
-                   .on('change', change);
+           context.perform(combinedAction, operation.annotation()); // do the extract

 
 

-               label
-                   .append('span')
-                   .text(function(d) { return _t(name + '.' + d + '.description'); });
+           var extractedNodeIDs = _actions.map(function (action) {
+             return action.getExtractedNodeID();
+           });

 
 

-               // Update
-               items = items
-                   .merge(enter);
+           context.enter(modeSelect(context, extractedNodeIDs));
+         };

 
 

-               items
-                   .classed('active', active)
-                   .selectAll('input')
-                   .property('checked', active)
-                   .property('indeterminate', autoHiddenFeature);
-           }
+         operation.available = function () {
+           return _actions.length && selectedIDs.length === _actions.length;
+         };

 
 

-           function autoHiddenFeature(d) {
-               return context.features().autoHidden(d);
+         operation.disabled = function () {
+           if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (selectedIDs.some(function (entityID) {
+             return context.graph().geometry(entityID) === 'vertex' && context.hasHiddenConnections(entityID);
+           })) {
+             return 'connected_to_hidden';

            }
 
            }
 

-           function showsFeature(d) {
-               return context.features().enabled(d);
-           }
+           return false;
+         };

 
 

-           function clickFeature(d) {
-               context.features().toggle(d);
-           }
+         operation.tooltip = function () {
+           var disableReason = operation.disabled();

 
 

-           function showsLayer(id) {
-               var layer = context.layers().layer(id);
-               return layer && layer.enabled();
+           if (disableReason) {
+             return _t('operations.extract.' + disableReason + '.' + _amount);
+           } else {
+             return _t('operations.extract.description.' + _geometryID + '.' + _amount);

            }
            }

+         };

 
 

-           // add listeners
-           context.features()
-               .on('change.map_features', section.reRender);
+         operation.annotation = function () {
+           return _t('operations.extract.annotation', {
+             n: selectedIDs.length
+           });
+         };

 
 

-           return section;
+         operation.id = 'extract';
+         operation.keys = [_t('operations.extract.key')];
+         operation.title = _t('operations.extract.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;

        }
 
        }
 

-       function uiSectionMapStyleOptions(context) {
-
-           var section = uiSection('fill-area', context)
-               .title(_t('map_data.style_options'))
-               .disclosureContent(renderDisclosureContent)
-               .expandedByDefault(false);
-
-           function renderDisclosureContent(selection) {
-               var container = selection.selectAll('.layer-fill-list')
-                   .data([0]);
-
-               container.enter()
-                   .append('ul')
-                   .attr('class', 'layer-list layer-fill-list')
-                   .merge(container)
-                   .call(drawListItems, context.map().areaFillOptions, 'radio', 'area_fill', setFill, isActiveFill);
-
-               var container2 = selection.selectAll('.layer-visual-diff-list')
-                   .data([0]);
-
-               container2.enter()
-                   .append('ul')
-                   .attr('class', 'layer-list layer-visual-diff-list')
-                   .merge(container2)
-                   .call(drawListItems, ['highlight_edits'], 'checkbox', 'visual_diff', toggleHighlightEdited, function() {
-                       return context.surface().classed('highlight-edited');
-                   });
+       function operationMerge(context, selectedIDs) {
+         var _action = getAction();
+
+         function getAction() {
+           // prefer a non-disabled action first
+           var join = actionJoin(selectedIDs);
+           if (!join.disabled(context.graph())) return join;
+           var merge = actionMerge(selectedIDs);
+           if (!merge.disabled(context.graph())) return merge;
+           var mergePolygon = actionMergePolygon(selectedIDs);
+           if (!mergePolygon.disabled(context.graph())) return mergePolygon;
+           var mergeNodes = actionMergeNodes(selectedIDs);
+           if (!mergeNodes.disabled(context.graph())) return mergeNodes; // otherwise prefer an action with an interesting disabled reason
+
+           if (join.disabled(context.graph()) !== 'not_eligible') return join;
+           if (merge.disabled(context.graph()) !== 'not_eligible') return merge;
+           if (mergePolygon.disabled(context.graph()) !== 'not_eligible') return mergePolygon;
+           return mergeNodes;
+         }
+
+         var operation = function operation() {
+           if (operation.disabled()) return;
+           context.perform(_action, operation.annotation());
+           context.validator().validate();
+           var resultIDs = selectedIDs.filter(context.hasEntity);
+
+           if (resultIDs.length > 1) {
+             var interestingIDs = resultIDs.filter(function (id) {
+               return context.entity(id).hasInterestingTags();
+             });
+             if (interestingIDs.length) resultIDs = interestingIDs;

            }
 
            }
 

-           function drawListItems(selection, data, type, name, change, active) {
-               var items = selection.selectAll('li')
-                   .data(data);
+           context.enter(modeSelect(context, resultIDs));
+         };

 
 

-               // Exit
-               items.exit()
-                   .remove();
+         operation.available = function () {
+           return selectedIDs.length >= 2;
+         };

 
 

-               // Enter
-               var enter = items.enter()
-                   .append('li')
-                   .call(uiTooltip()
-                       .title(function(d) {
-                           return _t(name + '.' + d + '.tooltip');
-                       })
-                       .keys(function(d) {
-                           var key = (d === 'wireframe' ? _t('area_fill.wireframe.key') : null);
-                           if (d === 'highlight_edits') { key = _t('map_data.highlight_edits.key'); }
-                           return key ? [key] : null;
-                       })
-                       .placement('top')
-                   );
+         operation.disabled = function () {
+           var actionDisabled = _action.disabled(context.graph());

 
 

-               var label = enter
-                   .append('label');
+           if (actionDisabled) return actionDisabled;
+           var osm = context.connection();

 
 

-               label
-                   .append('input')
-                   .attr('type', type)
-                   .attr('name', name)
-                   .on('change', change);
+           if (osm && _action.resultingWayNodesLength && _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
+             return 'too_many_vertices';
+           }

 
 

-               label
-                   .append('span')
-                   .text(function(d) { return _t(name + '.' + d + '.description'); });
+           return false;
+         };

 
 

-               // Update
-               items = items
-                   .merge(enter);
+         operation.tooltip = function () {
+           var disabled = operation.disabled();

 
 

-               items
-                   .classed('active', active)
-                   .selectAll('input')
-                   .property('checked', active)
-                   .property('indeterminate', false);
-           }
+           if (disabled) {
+             if (disabled === 'conflicting_relations') {
+               return _t('operations.merge.conflicting_relations');
+             }

 
 

-           function isActiveFill(d) {
-               return context.map().activeAreaFill() === d;
-           }
+             if (disabled === 'restriction' || disabled === 'connectivity') {
+               return _t('operations.merge.damage_relation', {
+                 relation: _mainPresetIndex.item('type/' + disabled).name()
+               });
+             }

 
 

-           function toggleHighlightEdited() {
-               event.preventDefault();
-               context.map().toggleHighlightEdited();
+             return _t('operations.merge.' + disabled);

            }
 
            }
 

-           function setFill(d) {
-               context.map().activeAreaFill(d);
-           }
+           return _t('operations.merge.description');
+         };

 
 

-           context.map()
-               .on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
+         operation.annotation = function () {
+           return _t('operations.merge.annotation', {
+             n: selectedIDs.length
+           });
+         };

 
 

-           return section;
+         operation.id = 'merge';
+         operation.keys = [_t('operations.merge.key')];
+         operation.title = _t('operations.merge.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;

        }
 
        }
 

-       function uiSectionPhotoOverlays(context) {
-
-           var layers = context.layers();
+       function operationPaste(context) {
+         var _pastePoint;

 
 

-           var section = uiSection('photo-overlays', context)
-               .title(_t('photo_overlays.title'))
-               .disclosureContent(renderDisclosureContent)
-               .expandedByDefault(false);
+         var operation = function operation() {
+           if (!_pastePoint) return;
+           var oldIDs = context.copyIDs();
+           if (!oldIDs.length) return;
+           var projection = context.projection;
+           var extent = geoExtent();
+           var oldGraph = context.copyGraph();
+           var newIDs = [];
+           var action = actionCopyEntities(oldIDs, oldGraph);
+           context.perform(action);
+           var copies = action.copies();
+           var originals = new Set();
+           Object.values(copies).forEach(function (entity) {
+             originals.add(entity.id);
+           });

 
 

-           function renderDisclosureContent(selection) {
-               var container = selection.selectAll('.photo-overlay-container')
-                   .data([0]);
+           for (var id in copies) {
+             var oldEntity = oldGraph.entity(id);
+             var newEntity = copies[id];

 
 

-               container.enter()
-                   .append('div')
-                   .attr('class', 'photo-overlay-container')
-                   .merge(container)
-                   .call(drawPhotoItems)
-                   .call(drawPhotoTypeItems);
-           }
+             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.

 
 

-           function drawPhotoItems(selection) {
-               var photoKeys = context.photos().overlayLayerIDs();
-               var photoLayers = layers.all().filter(function(obj) { return photoKeys.indexOf(obj.id) !== -1; });
-               var data = photoLayers.filter(function(obj) { return obj.layer.supported(); });

 
 

-               function layerSupported(d) {
-                   return d.layer && d.layer.supported();
-               }
-               function layerEnabled(d) {
-                   return layerSupported(d) && d.layer.enabled();
-               }
+             var parents = context.graph().parentWays(newEntity);
+             var parentCopied = parents.some(function (parent) {
+               return originals.has(parent.id);
+             });

 
 

-               var ul = selection
-                   .selectAll('.layer-list-photos')
-                   .data([0]);
+             if (!parentCopied) {
+               newIDs.push(newEntity.id);
+             }
+           } // Use the location of the copy operation to offset the paste location,
+           // or else use the center of the pasted extent

 
 

-               ul = ul.enter()
-                   .append('ul')
-                   .attr('class', 'layer-list layer-list-photos')
-                   .merge(ul);

 
 

-               var li = ul.selectAll('.list-item-photos')
-                   .data(data);
+           var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
+           var delta = geoVecSubtract(_pastePoint, copyPoint); // Move the pasted objects to be anchored at the paste location

 
 

-               li.exit()
-                   .remove();
+           context.replace(actionMove(newIDs, delta, projection), operation.annotation());
+           context.enter(modeSelect(context, newIDs));
+         };

 
 

-               var liEnter = li.enter()
-                   .append('li')
-                   .attr('class', function(d) {
-                       var classes = 'list-item-photos list-item-' + d.id;
-                       if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
-                           classes += ' indented';
-                       }
-                       return classes;
-                   });
+         operation.point = function (val) {
+           _pastePoint = val;
+           return operation;
+         };

 
 

-               var labelEnter = liEnter
-                   .append('label')
-                   .each(function(d) {
-                       var titleID;
-                       if (d.id === 'mapillary-signs') { titleID = 'mapillary.signs.tooltip'; }
-                       else if (d.id === 'mapillary') { titleID = 'mapillary_images.tooltip'; }
-                       else if (d.id === 'openstreetcam') { titleID = 'openstreetcam_images.tooltip'; }
-                       else { titleID = d.id.replace(/-/g, '_') + '.tooltip'; }
-                       select(this)
-                           .call(uiTooltip()
-                               .title(_t(titleID))
-                               .placement('top')
-                           );
-                   });
+         operation.available = function () {
+           return context.mode().id === 'browse';
+         };

 
 

-               labelEnter
-                   .append('input')
-                   .attr('type', 'checkbox')
-                   .on('change', function(d) { toggleLayer(d.id); });
-
-               labelEnter
-                   .append('span')
-                   .text(function(d) {
-                       var id = d.id;
-                       if (id === 'mapillary-signs') { id = 'photo_overlays.traffic_signs'; }
-                       return _t(id.replace(/-/g, '_') + '.title');
-                   });
+         operation.disabled = function () {
+           return !context.copyIDs().length;
+         };

 
 

+         operation.tooltip = function () {
+           var oldGraph = context.copyGraph();
+           var ids = context.copyIDs();

 
 

-               // Update
-               li
-                   .merge(liEnter)
-                   .classed('active', layerEnabled)
-                   .selectAll('input')
-                   .property('checked', layerEnabled);
+           if (!ids.length) {
+             return _t('operations.paste.nothing_copied');

            }
 
            }
 

-           function drawPhotoTypeItems(selection) {
-               var data = context.photos().allPhotoTypes();
-
-               function typeEnabled(d) {
-                   return context.photos().showsPhotoType(d);
-               }
-
-               var ul = selection
-                   .selectAll('.layer-list-photo-types')
-                   .data(context.photos().shouldFilterByPhotoType() ? [0] : []);
+           return _t('operations.paste.description', {
+             feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
+             n: ids.length
+           });
+         };

 
 

-               ul.exit()
-                   .remove();
+         operation.annotation = function () {
+           var ids = context.copyIDs();
+           return _t('operations.paste.annotation', {
+             n: ids.length
+           });
+         };

 
 

-               ul = ul.enter()
-                   .append('ul')
-                   .attr('class', 'layer-list layer-list-photo-types')
-                   .merge(ul);
+         operation.id = 'paste';
+         operation.keys = [uiCmd('⌘V')];
+         operation.title = _t('operations.paste.title');
+         return operation;
+       }

 
 

-               var li = ul.selectAll('.list-item-photo-types')
-                   .data(data);
+       function operationReverse(context, selectedIDs) {
+         var operation = function operation() {
+           context.perform(function combinedReverseAction(graph) {
+             actions().forEach(function (action) {
+               graph = action(graph);
+             });
+             return graph;
+           }, operation.annotation());
+           context.validator().validate();
+         };

 
 

-               li.exit()
-                   .remove();
+         function actions(situation) {
+           return selectedIDs.map(function (entityID) {
+             var entity = context.hasEntity(entityID);
+             if (!entity) return null;

 
 

-               var liEnter = li.enter()
-                   .append('li')
-                   .attr('class', function(d) {
-                       return 'list-item-photo-types list-item-' + d;
-                   });
+             if (situation === 'toolbar') {
+               if (entity.type === 'way' && !entity.isOneWay() && !entity.isSided()) return null;
+             }

 
 

-               var labelEnter = liEnter
-                   .append('label')
-                   .each(function(d) {
-                       select(this)
-                           .call(uiTooltip()
-                               .title(_t('photo_overlays.photo_type.' + d + '.tooltip'))
-                               .placement('top')
-                           );
-                   });
+             var geometry = entity.geometry(context.graph());
+             if (entity.type !== 'node' && geometry !== 'line') return null;
+             var action = actionReverse(entityID);
+             if (action.disabled(context.graph())) return null;
+             return action;
+           }).filter(Boolean);
+         }

 
 

-               labelEnter
-                   .append('input')
-                   .attr('type', 'checkbox')
-                   .on('change', function(d) {
-                       context.photos().togglePhotoType(d);
-                   });
+         function reverseTypeID() {
+           var acts = actions();
+           var nodeActionCount = acts.filter(function (act) {
+             var entity = context.hasEntity(act.entityID());
+             return entity && entity.type === 'node';
+           }).length;
+           if (nodeActionCount === 0) return 'line';
+           if (nodeActionCount === acts.length) return 'point';
+           return 'feature';
+         }

 
 

-               labelEnter
-                   .append('span')
-                   .text(function(d) {
-                       return _t('photo_overlays.photo_type.' + d + '.title');
-                   });
+         operation.available = function (situation) {
+           return actions(situation).length > 0;
+         };

 
 

+         operation.disabled = function () {
+           return false;
+         };

 
 

-               // Update
-               li
-                   .merge(liEnter)
-                   .classed('active', typeEnabled)
-                   .selectAll('input')
-                   .property('checked', typeEnabled);
-           }
+         operation.tooltip = function () {
+           return _t('operations.reverse.description.' + reverseTypeID());
+         };

 
 

-           function toggleLayer(which) {
-               setLayer(which, !showsLayer(which));
-           }
+         operation.annotation = function () {
+           var acts = actions();
+           return _t('operations.reverse.annotation.' + reverseTypeID(), {
+             n: acts.length
+           });
+         };

 
 

-           function showsLayer(which) {
-               var layer = layers.layer(which);
-               if (layer) {
-                   return layer.enabled();
-               }
-               return false;
-           }
+         operation.id = 'reverse';
+         operation.keys = [_t('operations.reverse.key')];
+         operation.title = _t('operations.reverse.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }

 
 

-           function setLayer(which, enabled) {
-               var layer = layers.layer(which);
-               if (layer) {
-                   layer.enabled(enabled);
-               }
-           }
+       function operationSplit(context, selectedIDs) {
+         var _vertexIds = selectedIDs.filter(function (id) {
+           return context.graph().geometry(id) === 'vertex';
+         });

 
 

-           context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
-           context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
+         var _selectedWayIds = selectedIDs.filter(function (id) {
+           var entity = context.graph().hasEntity(id);
+           return entity && entity.type === 'way';
+         });

 
 

-           return section;
-       }
+         var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;

 
 

-       function uiPaneMapData(context) {
+         var _action = actionSplit(_vertexIds);

 
 

-           var mapDataPane = uiPane('map-data', context)
-               .key(_t('map_data.key'))
-               .title(_t('map_data.title'))
-               .description(_t('map_data.description'))
-               .iconName('iD-icon-data')
-               .sections([
-                   uiSectionDataLayers(context),
-                   uiSectionPhotoOverlays(context),
-                   uiSectionMapStyleOptions(context),
-                   uiSectionMapFeatures(context)
-               ]);
+         var _ways = [];
+         var _geometry = 'feature';
+         var _waysAmount = 'single';

 
 

-           return mapDataPane;
-       }
+         var _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';

 
 

-       function uiSectionPrivacy(context) {
+         if (_isAvailable) {
+           if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
+           _ways = _action.ways(context.graph());
+           var geometries = {};

 
 

-           var section = uiSection('preferences-third-party', context)
-             .title(_t('preferences.privacy.title'))
-             .disclosureContent(renderDisclosureContent);
+           _ways.forEach(function (way) {
+             geometries[way.geometry(context.graph())] = true;
+           });

 
 

-           var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+           if (Object.keys(geometries).length === 1) {
+             _geometry = Object.keys(geometries)[0];
+           }

 
 

-           function renderDisclosureContent(selection) {
-             // enter
-             var privacyOptionsListEnter = selection.selectAll('.privacy-options-list')
-               .data([0])
-               .enter()
-               .append('ul')
-               .attr('class', 'layer-list privacy-options-list');
-
-             var thirdPartyIconsEnter = privacyOptionsListEnter
-               .append('li')
-               .attr('class', 'privacy-third-party-icons-item')
-               .append('label')
-               .call(uiTooltip()
-                 .title(_t('preferences.privacy.third_party_icons.tooltip'))
-                 .placement('bottom')
-               );
+           _waysAmount = _ways.length === 1 ? 'single' : 'multiple';
+         }

 
 

-             thirdPartyIconsEnter
-               .append('input')
-               .attr('type', 'checkbox')
-               .on('change', function () {
-                 event.preventDefault();
-                 _showThirdPartyIcons = (_showThirdPartyIcons === 'true') ? 'false' : 'true';
-                 corePreferences('preferences.privacy.thirdpartyicons', _showThirdPartyIcons);
-                 update();
-               });
+         var operation = function operation() {
+           var difference = context.perform(_action, operation.annotation()); // select both the nodes and the ways so the mapper can immediately disconnect them if desired

 
 

-             thirdPartyIconsEnter
-               .append('span')
-               .text(_t('preferences.privacy.third_party_icons.description'));
+           var idsToSelect = _vertexIds.concat(difference.extantIDs().filter(function (id) {
+             // filter out relations that may have had member additions
+             return context.entity(id).type === 'way';
+           }));

 
 

+           context.enter(modeSelect(context, idsToSelect));
+         };

 
 

-             // Privacy Policy link
-             selection.selectAll('.privacy-link')
-               .data([0])
-               .enter()
-               .append('div')
-               .attr('class', 'privacy-link')
-               .append('a')
-               .attr('target', '_blank')
-               .call(svgIcon('#iD-icon-out-link', 'inline'))
-               .attr('href', 'https://github.com/openstreetmap/iD/blob/release/PRIVACY.md')
-               .append('span')
-               .text(_t('preferences.privacy.privacy_link'));
+         operation.relatedEntityIds = function () {
+           return _selectedWayIds.length ? [] : _ways.map(function (way) {
+             return way.id;
+           });
+         };

 
 

-             update();
+         operation.available = function () {
+           return _isAvailable;
+         };

 
 

+         operation.disabled = function () {
+           var reason = _action.disabled(context.graph());

 
 

-             function update() {
-               selection.selectAll('.privacy-third-party-icons-item')
-                 .classed('active', (_showThirdPartyIcons === 'true'))
-                 .select('input')
-                 .property('checked', (_showThirdPartyIcons === 'true'));
-             }
+           if (reason) {
+             return reason;
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';

            }
 
            }
 

-           return section;
-       }
+           return false;
+         };

 
 

-       function uiPanePreferences(context) {
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           if (disable) return _t('operations.split.' + disable);
+           return _t('operations.split.description.' + _geometry + '.' + _waysAmount + '.' + _nodesAmount + '_node');
+         };

 
 

-         var preferencesPane = uiPane('preferences', context)
-           .key(_t('preferences.key'))
-           .title(_t('preferences.title'))
-           .description(_t('preferences.description'))
-           .iconName('fas-user-cog')
-           .sections([
-               uiSectionPrivacy(context)
-           ]);
+         operation.annotation = function () {
+           return _t('operations.split.annotation.' + _geometry, {
+             n: _ways.length
+           });
+         };

 
 

-         return preferencesPane;
+         operation.id = 'split';
+         operation.keys = [_t('operations.split.key')];
+         operation.title = _t('operations.split.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;

        }
 
        }
 

-       function uiInit(context) {
-           var _initCounter = 0;
-           var _needWidth = {};
-
-           var _lastPointerType;
+       function operationStraighten(context, selectedIDs) {
+         var _wayIDs = selectedIDs.filter(function (id) {
+           return id.charAt(0) === 'w';
+         });

 
 

+         var _nodeIDs = selectedIDs.filter(function (id) {
+           return id.charAt(0) === 'n';
+         });

 
 

-           function render(container) {
+         var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';

 
 

-               container
-                   .on('click.ui', function() {
-                       // we're only concerned with the primary mouse button
-                       if (event.button !== 0) { return; }
+         var _nodes = utilGetAllNodes(selectedIDs, context.graph());

 
 

-                       if (!event.composedPath) { return; }
+         var _coords = _nodes.map(function (n) {
+           return n.loc;
+         });

 
 

-                       // some targets have default click events we don't want to override
-                       var isOkayTarget = event.composedPath().some(function(node) {
-                           // we only care about element nodes
-                           return node.nodeType === 1 &&
-                               // clicking <input> focuses it and/or changes a value
-                               (node.nodeName === 'INPUT' ||
-                               // clicking <label> affects its <input> by default
-                               node.nodeName === 'LABEL' ||
-                               // clicking <a> opens a hyperlink by default
-                               node.nodeName === 'A');
-                       });
-                       if (isOkayTarget) { return; }
+         var _extent = utilTotalExtent(selectedIDs, context.graph());

 
 

-                       // disable double-tap-to-zoom on touchscreens
-                       event.preventDefault();
-                   });
+         var _action = chooseAction();

 
 

-               var detected = utilDetect();
+         var _geometry;

 
 

-               // only WebKit supports gesture events
-               if ('GestureEvent' in window &&
-                   // Listening for gesture events on iOS 13.4+ breaks double-tapping,
-                   // but we only need to do this on desktop Safari anyway. – #7694
-                   !detected.isMobileWebKit) {
+         function chooseAction() {
+           // straighten selected nodes
+           if (_wayIDs.length === 0 && _nodeIDs.length > 2) {
+             _geometry = 'point';
+             return actionStraightenNodes(_nodeIDs, context.projection); // straighten selected ways (possibly between range of 2 selected nodes)
+           } else if (_wayIDs.length > 0 && (_nodeIDs.length === 0 || _nodeIDs.length === 2)) {
+             var startNodeIDs = [];
+             var endNodeIDs = [];

 
 

-                   // On iOS we disable pinch-to-zoom of the UI via the `touch-action`
-                   // CSS property, but on desktop Safari we need to manually cancel the
-                   // default gesture events.
-                   container.on('gesturestart.ui gesturechange.ui gestureend.ui', function() {
-                       // disable pinch-to-zoom of the UI via multitouch trackpads on macOS Safari
-                       event.preventDefault();
-                   });
-               }
+             for (var i = 0; i < selectedIDs.length; i++) {
+               var entity = context.entity(selectedIDs[i]);

 
 

-               if ('PointerEvent' in window) {
-                   select(window)
-                       .on('pointerdown.ui pointerup.ui', function() {
-                           var pointerType = event.pointerType || 'mouse';
-                           if (_lastPointerType !== pointerType) {
-                               _lastPointerType = pointerType;
-                               container
-                                   .attr('pointer', pointerType);
-                           }
-                       }, true);
-               } else {
-                   _lastPointerType = 'mouse';
-                   container
-                       .attr('pointer', 'mouse');
+               if (entity.type === 'node') {
+                 continue;
+               } else if (entity.type !== 'way' || entity.isClosed()) {
+                 return null; // exit early, can't straighten these

                }
 
                }
 

-               container
-                   .attr('dir', _mainLocalizer.textDirection());
-
-               // setup fullscreen keybindings (no button shown at this time)
-               container
-                   .call(uiFullScreen(context));
+               startNodeIDs.push(entity.first());
+               endNodeIDs.push(entity.last());
+             } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)

 
 

-               var map = context.map();
-               map.redrawEnable(false);  // don't draw until we've set zoom/lat/long

 
 

-               map
-                   .on('hitMinZoom.ui', function() {
-                       ui.flash.text(_t('cannot_zoom'))();
-                   });
-
-               container
-                   .append('svg')
-                   .attr('id', 'ideditor-defs')
-                   .call(svgDefs(context));
+             startNodeIDs = startNodeIDs.filter(function (n) {
+               return startNodeIDs.indexOf(n) === startNodeIDs.lastIndexOf(n);
+             });
+             endNodeIDs = endNodeIDs.filter(function (n) {
+               return endNodeIDs.indexOf(n) === endNodeIDs.lastIndexOf(n);
+             }); // Ensure all ways are connected (i.e. only 2 unique endpoints/startpoints)

 
 

-               container
-                   .append('div')
-                   .attr('class', 'sidebar')
-                   .call(ui.sidebar);
+             if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes

 
 

-               var content = container
-                   .append('div')
-                   .attr('class', 'main-content active');
+             var wayNodeIDs = utilGetAllNodes(_wayIDs, context.graph()).map(function (node) {
+               return node.id;
+             });
+             if (wayNodeIDs.length <= 2) return null; // If range of 2 selected nodes is supplied, ensure nodes lie on the selected path

 
 

-               // Top toolbar
-               content
-                   .append('div')
-                   .attr('class', 'top-toolbar-wrap')
-                   .append('div')
-                   .attr('class', 'top-toolbar fillD')
-                   .call(uiTopToolbar(context));
+             if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;

 
 

-               content
-                   .append('div')
-                   .attr('class', 'main-map')
-                   .attr('dir', 'ltr')
-                   .call(map);
+             if (_nodeIDs.length) {
+               // If we're only straightenting between two points, we only need that extent visible
+               _extent = utilTotalExtent(_nodeIDs, context.graph());
+             }

 
 

-               content
-                   .append('div')
-                   .attr('class', 'spinner')
-                   .call(uiSpinner(context));
+             _geometry = 'line';
+             return actionStraightenWay(selectedIDs, context.projection);
+           }

 
 

-               // Add attribution and footer
-               var about = content
-                   .append('div')
-                   .attr('class', 'map-footer');
+           return null;
+         }

 
 

-               about
-                   .append('div')
-                   .attr('class', 'attribution-wrap')
-                   .attr('dir', 'ltr')
-                   .call(uiAttribution(context));
+         function operation() {
+           if (!_action) return;
+           context.perform(_action, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
+         }

 
 

-               about
-                   .append('div')
-                   .attr('class', 'api-status')
-                   .call(uiStatus(context));
+         operation.available = function () {
+           return Boolean(_action);
+         };

 
 

+         operation.disabled = function () {
+           var reason = _action.disabled(context.graph());

 
 

-               var footer = about
-                   .append('div')
-                   .attr('class', 'map-footer-bar fillD');
+           if (reason) {
+             return reason;
+           } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           }

 
 

-               footer
-                   .append('div')
-                   .attr('class', 'flash-wrap footer-hide');
+           return false;

 
 

-               var footerWrap = footer
-                   .append('div')
-                   .attr('class', 'main-footer-wrap footer-show');
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();

 
 

-               footerWrap
-                   .append('div')
-                   .attr('class', 'scale-block')
-                   .call(uiScale(context));
+             if (osm) {
+               var missing = _coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });

 
 

-               var aboutList = footerWrap
-                   .append('div')
-                   .attr('class', 'info-block')
-                   .append('ul')
-                   .attr('class', 'map-footer-list');
-
-               if (!context.embed()) {
-                   aboutList
-                       .call(uiAccount(context));
-               }
-
-               aboutList
-                   .append('li')
-                   .attr('class', 'version')
-                   .call(uiVersion(context));
-
-               var issueLinks = aboutList
-                   .append('li');
-
-               issueLinks
-                   .append('a')
-                   .attr('target', '_blank')
-                   .attr('href', 'https://github.com/openstreetmap/iD/issues')
-                   .call(svgIcon('#iD-icon-bug', 'light'))
-                   .call(uiTooltip().title(_t('report_a_bug')).placement('top'));
-
-               issueLinks
-                   .append('a')
-                   .attr('target', '_blank')
-                   .attr('href', 'https://github.com/openstreetmap/iD/blob/develop/CONTRIBUTING.md#translating')
-                   .call(svgIcon('#iD-icon-translate', 'light'))
-                   .call(uiTooltip().title(_t('help_translate')).placement('top'));
-
-               aboutList
-                   .append('li')
-                   .attr('class', 'feature-warning')
-                   .attr('tabindex', -1)
-                   .call(uiFeatureInfo(context));
-
-               aboutList
-                   .append('li')
-                   .attr('class', 'issues-info')
-                   .attr('tabindex', -1)
-                   .call(uiIssuesInfo(context));
-
-               var apiConnections = context.apiConnections();
-               if (apiConnections && apiConnections.length > 1) {
-                   aboutList
-                       .append('li')
-                       .attr('class', 'source-switch')
-                       .attr('tabindex', -1)
-                       .call(uiSourceSwitch(context)
-                           .keys(apiConnections)
-                       );
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;

                }
                }

+             }

 
 

-               aboutList
-                   .append('li')
-                   .attr('class', 'user-list')
-                   .attr('tabindex', -1)
-                   .call(uiContributors(context));
-
+             return false;
+           }
+         };

 
 

-               // Setup map dimensions and move map to initial center/zoom.
-               // This should happen after .main-content and toolbars exist.
-               ui.onResize();
-               map.redrawEnable(true);
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
+         };

 
 

-               ui.hash = behaviorHash(context);
-               ui.hash();
-               if (!ui.hash.hadHash) {
-                   map.centerZoom([0, 0], 2);
-               }
+         operation.annotation = function () {
+           return _t('operations.straighten.annotation.' + _geometry, {
+             n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
+           });
+         };

 
 

+         operation.id = 'straighten';
+         operation.keys = [_t('operations.straighten.key')];
+         operation.title = _t('operations.straighten.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }

 
 

-               var overMap = content
-                   .append('div')
-                   .attr('class', 'over-map');
+       var Operations = /*#__PURE__*/Object.freeze({
+               __proto__: null,
+               operationCircularize: operationCircularize,
+               operationContinue: operationContinue,
+               operationCopy: operationCopy,
+               operationDelete: operationDelete,
+               operationDisconnect: operationDisconnect,
+               operationDowngrade: operationDowngrade,
+               operationExtract: operationExtract,
+               operationMerge: operationMerge,
+               operationMove: operationMove,
+               operationOrthogonalize: operationOrthogonalize,
+               operationPaste: operationPaste,
+               operationReflectShort: operationReflectShort,
+               operationReflectLong: operationReflectLong,
+               operationReverse: operationReverse,
+               operationRotate: operationRotate,
+               operationSplit: operationSplit,
+               operationStraighten: operationStraighten
+       });

 
 

-               // Map controls
-               var controls = overMap
-                   .append('div')
-                   .attr('class', 'map-controls');
+       function modeSelect(context, selectedIDs) {
+         var mode = {
+           id: 'select',
+           button: 'browse'
+         };
+         var keybinding = utilKeybinding('select');

 
 

-               controls
-                   .append('div')
-                   .attr('class', 'map-control zoombuttons')
-                   .call(uiZoom(context));
+         var _breatheBehavior = behaviorBreathe();

 
 

-               controls
-                   .append('div')
-                   .attr('class', 'map-control zoom-to-selection-control')
-                   .call(uiZoomToSelection(context));
+         var _modeDragNode = modeDragNode(context);

 
 

-               controls
-                   .append('div')
-                   .attr('class', 'map-control geolocate-control')
-                   .call(uiGeolocate(context));
+         var _selectBehavior;

 
 

-               // Add panes
-               // This should happen after map is initialized, as some require surface()
-               var panes = overMap
-                   .append('div')
-                   .attr('class', 'map-panes');
-
-               var uiPanes = [
-                   uiPaneBackground(context),
-                   uiPaneMapData(context),
-                   uiPaneIssues(context),
-                   uiPanePreferences(context),
-                   uiPaneHelp(context)
-               ];
+         var _behaviors = [];
+         var _operations = [];
+         var _newFeature = false;
+         var _follow = false; // `_focusedParentWayId` is used when we visit a vertex with multiple
+         // parents, and we want to remember which parent line we started on.

 
 

-               uiPanes.forEach(function(pane) {
-                   controls
-                       .append('div')
-                       .attr('class', 'map-control map-pane-control ' + pane.id + '-control')
-                       .call(pane.renderToggleButton);
+         var _focusedParentWayId;

 
 

-                   panes
-                       .call(pane.renderPane);
-               });
+         var _focusedVertexIds;

 
 

-               ui.info = uiInfo(context);
+         function singular() {
+           if (selectedIDs && selectedIDs.length === 1) {
+             return context.hasEntity(selectedIDs[0]);
+           }
+         }

 
 

-               // Add absolutely-positioned elements that sit on top of the map
-               // This should happen after the map is ready (center/zoom)
-               overMap
-                   .call(uiMapInMap(context))
-                   .call(ui.info)
-                   .call(uiNotice(context));
+         function selectedEntities() {
+           return selectedIDs.map(function (id) {
+             return context.hasEntity(id);
+           }).filter(Boolean);
+         }

 
 

+         function checkSelectedIDs() {
+           var ids = [];

 
 

-               overMap
-                   .append('div')
-                   .attr('class', 'photoviewer')
-                   .classed('al', true)       // 'al'=left,  'ar'=right
-                   .classed('hide', true)
-                   .call(ui.photoviewer);
+           if (Array.isArray(selectedIDs)) {
+             ids = selectedIDs.filter(function (id) {
+               return context.hasEntity(id);
+             });
+           }

 
 

+           if (!ids.length) {
+             context.enter(modeBrowse(context));
+             return false;
+           } else if (selectedIDs.length > 1 && ids.length === 1 || selectedIDs.length === 1 && ids.length > 1) {
+             // switch between single- and multi-select UI
+             context.enter(modeSelect(context, ids));
+             return false;
+           }

 
 

-               // Bind events
-               window.onbeforeunload = function() {
-                   return context.save();
-               };
-               window.onunload = function() {
-                   context.history().unlock();
-               };
+           selectedIDs = ids;
+           return true;
+         } // find the parent ways for nextVertex, previousVertex, and selectParent

 
 

-               select(window)
-                   .on('resize.editor', ui.onResize);
-
-
-               var panPixels = 80;
-               context.keybinding()
-                   .on('⌫', function() { event.preventDefault(); })
-                   .on([_t('sidebar.key'), '`', '²', '@'], ui.sidebar.toggle)   // #5663, #6864 - common QWERTY, AZERTY
-                   .on('←', pan([panPixels, 0]))
-                   .on('↑', pan([0, panPixels]))
-                   .on('→', pan([-panPixels, 0]))
-                   .on('↓', pan([0, -panPixels]))
-                   .on(uiCmd('⌘←'), pan([map.dimensions()[0], 0]))
-                   .on(uiCmd('⌘↑'), pan([0, map.dimensions()[1]]))
-                   .on(uiCmd('⌘→'), pan([-map.dimensions()[0], 0]))
-                   .on(uiCmd('⌘↓'), pan([0, -map.dimensions()[1]]))
-                   .on(uiCmd('⌘' + _t('background.key')), function quickSwitch() {
-                       if (event) {
-                           event.stopImmediatePropagation();
-                           event.preventDefault();
-                       }
-                       var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
-                       if (previousBackground) {
-                           var currentBackground = context.background().baseLayerSource();
-                           corePreferences('background-last-used-toggle', currentBackground.id);
-                           corePreferences('background-last-used', previousBackground.id);
-                           context.background().baseLayerSource(previousBackground);
-                       }
-                   })
-                   .on(_t('area_fill.wireframe.key'), function toggleWireframe() {
-                       event.preventDefault();
-                       event.stopPropagation();
-                       context.map().toggleWireframe();
-                   })
-                   .on(uiCmd('⌥' + _t('area_fill.wireframe.key')), function toggleOsmData() {
-                       event.preventDefault();
-                       event.stopPropagation();
-
-                       // Don't allow layer changes while drawing - #6584
-                       var mode = context.mode();
-                       if (mode && /^draw/.test(mode.id)) { return; }
-
-                       var layer = context.layers().layer('osm');
-                       if (layer) {
-                           layer.enabled(!layer.enabled());
-                           if (!layer.enabled()) {
-                               context.enter(modeBrowse(context));
-                           }
-                       }
-                   })
-                   .on(_t('map_data.highlight_edits.key'), function toggleHighlightEdited() {
-                       event.preventDefault();
-                       context.map().toggleHighlightEdited();
-                   });

 
 

-               context
-                   .on('enter.editor', function(entered) {
-                       container
-                           .classed('mode-' + entered.id, true);
-                   })
-                   .on('exit.editor', function(exited) {
-                       container
-                           .classed('mode-' + exited.id, false);
-                   });
+         function parentWaysIdsOfSelection(onlyCommonParents) {
+           var graph = context.graph();
+           var parents = [];

 
 

-               context.enter(modeBrowse(context));
+           for (var i = 0; i < selectedIDs.length; i++) {
+             var entity = context.hasEntity(selectedIDs[i]);

 
 

-               if (!_initCounter++) {
-                   if (!ui.hash.startWalkthrough) {
-                       context.container()
-                           .call(uiSplash(context))
-                           .call(uiRestore(context));
-                   }
+             if (!entity || entity.geometry(graph) !== 'vertex') {
+               return []; // selection includes some non-vertices
+             }

 
 

-                   context.container()
-                       .call(uiShortcuts(context));
-               }
+             var currParents = graph.parentWays(entity).map(function (w) {
+               return w.id;
+             });

 
 

-               var osm = context.connection();
-               var auth = uiLoading(context).message(_t('loading_auth')).blocking(true);
+             if (!parents.length) {
+               parents = currParents;
+               continue;
+             }

 
 

-               if (osm && auth) {
-                   osm
-                       .on('authLoading.ui', function() {
-                           context.container()
-                               .call(auth);
-                       })
-                       .on('authDone.ui', function() {
-                           auth.close();
-                       });
-               }
+             parents = (onlyCommonParents ? utilArrayIntersection : utilArrayUnion)(parents, currParents);

 
 

-               _initCounter++;
+             if (!parents.length) {
+               return [];
+             }
+           }

 
 

-               if (ui.hash.startWalkthrough) {
-                   ui.hash.startWalkthrough = false;
-                   context.container().call(uiIntro(context));
-               }
+           return parents;
+         } // find the child nodes for selected ways

 
 
 
 

-               function pan(d) {
-                   return function() {
-                       if (event.shiftKey) { return; }
-                       if (context.container().select('.combobox').size()) { return; }
-                       event.preventDefault();
-                       context.map().pan(d, 100);
-                   };
-               }
+         function childNodeIdsOfSelection(onlyCommon) {
+           var graph = context.graph();
+           var childs = [];

 
 

-           }
+           for (var i = 0; i < selectedIDs.length; i++) {
+             var entity = context.hasEntity(selectedIDs[i]);

 
 

+             if (!entity || !['area', 'line'].includes(entity.geometry(graph))) {
+               return []; // selection includes non-area/non-line
+             }

 
 

-           var ui = {};
+             var currChilds = graph.childNodes(entity).map(function (node) {
+               return node.id;
+             });

 
 

-           var _loadPromise;
-           // renders the iD interface into the container node
-           ui.ensureLoaded = function () {
+             if (!childs.length) {
+               childs = currChilds;
+               continue;
+             }

 
 

-               if (_loadPromise) { return _loadPromise; }
+             childs = (onlyCommon ? utilArrayIntersection : utilArrayUnion)(childs, currChilds);

 
 

-               return _loadPromise = Promise.all([
-                       // must have strings and presets before loading the UI
-                       _mainLocalizer.ensureLoaded(),
-                       _mainPresetIndex.ensureLoaded()
-                   ])
-                   .then(function () {
-                       if (!context.container().empty()) { render(context.container()); }
-                   })
-                   .catch(function (err) { return console.error(err); });  // eslint-disable-line
-           };
+             if (!childs.length) {
+               return [];
+             }
+           }

 
 

+           return childs;
+         }

 
 

-           // `ui.restart()` will destroy and rebuild the entire iD interface,
-           // for example to switch the locale while iD is running.
-           ui.restart = function() {
-               context.keybinding().clear();
+         function checkFocusedParent() {
+           if (_focusedParentWayId) {
+             var parents = parentWaysIdsOfSelection(true);
+             if (parents.indexOf(_focusedParentWayId) === -1) _focusedParentWayId = null;
+           }
+         }

 
 

-               _loadPromise = null;
+         function parentWayIdForVertexNavigation() {
+           var parentIds = parentWaysIdsOfSelection(true);

 
 

-               context.container().selectAll('*').remove();
+           if (_focusedParentWayId && parentIds.indexOf(_focusedParentWayId) !== -1) {
+             // prefer the previously seen parent
+             return _focusedParentWayId;
+           }

 
 

-               ui.ensureLoaded();
-           };
+           return parentIds.length ? parentIds[0] : null;
+         }

 
 

-           ui.lastPointerType = function() {
-               return _lastPointerType;
-           };
+         mode.selectedIDs = function (val) {
+           if (!arguments.length) return selectedIDs;
+           selectedIDs = val;
+           return mode;
+         };

 
 

-           ui.flash = uiFlash(context);
+         mode.zoomToSelected = function () {
+           context.map().zoomToEase(selectedEntities());
+         };

 
 

-           ui.sidebar = uiSidebar(context);
+         mode.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return mode;
+         };

 
 

-           ui.photoviewer = uiPhotoviewer(context);
+         mode.selectBehavior = function (val) {
+           if (!arguments.length) return _selectBehavior;
+           _selectBehavior = val;
+           return mode;
+         };

 
 

-           ui.onResize = function(withPan) {
-               var map = context.map();
+         mode.follow = function (val) {
+           if (!arguments.length) return _follow;
+           _follow = val;
+           return mode;
+         };

 
 

-               // Recalc dimensions of map and sidebar.. (`true` = force recalc)
-               // This will call `getBoundingClientRect` and trigger reflow,
-               //  but the values will be cached for later use.
-               var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
-               utilGetDimensions(context.container().select('.sidebar'), true);
+         function loadOperations() {
+           _operations.forEach(function (operation) {
+             if (operation.behavior) {
+               context.uninstall(operation.behavior);
+             }
+           });

 
 

-               if (withPan !== undefined) {
-                   map.redrawEnable(false);
-                   map.pan(withPan);
-                   map.redrawEnable(true);
-               }
-               map.dimensions(mapDimensions);
+           _operations = Object.values(Operations).map(function (o) {
+             return o(context, selectedIDs);
+           }).filter(function (o) {
+             return o.id !== 'delete' && o.id !== 'downgrade' && o.id !== 'copy';
+           }).concat([// group copy/downgrade/delete operation together at the end of the list
+           operationCopy(context, selectedIDs), operationDowngrade(context, selectedIDs), operationDelete(context, selectedIDs)]).filter(function (operation) {
+             return operation.available();
+           });

 
 

-               ui.photoviewer.onMapResize();
+           _operations.forEach(function (operation) {
+             if (operation.behavior) {
+               context.install(operation.behavior);
+             }
+           }); // remove any displayed menu

 
 

-               // check if header or footer have overflowed
-               ui.checkOverflow('.top-toolbar');
-               ui.checkOverflow('.map-footer-bar');

 
 

-               // Use outdated code so it works on Explorer
-               var resizeWindowEvent = document.createEvent('Event');
+           context.ui().closeEditMenu();
+         }

 
 

-               resizeWindowEvent.initEvent('resizeWindow', true, true);
+         mode.operations = function () {
+           return _operations;
+         };

 
 

-               document.dispatchEvent(resizeWindowEvent);
-           };
+         mode.enter = function () {
+           if (!checkSelectedIDs()) return;
+           context.features().forceVisible(selectedIDs);

 
 

+           _modeDragNode.restoreSelectedIDs(selectedIDs);

 
 

-           // Call checkOverflow when resizing or whenever the contents change.
-           ui.checkOverflow = function(selector, reset) {
-               if (reset) {
-                   delete _needWidth[selector];
-               }
+           loadOperations();

 
 

-               var element = select(selector);
-               var scrollWidth = element.property('scrollWidth');
-               var clientWidth = element.property('clientWidth');
-               var needed = _needWidth[selector] || scrollWidth;
+           if (!_behaviors.length) {
+             if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
+             _behaviors = [behaviorPaste(context), _breatheBehavior, behaviorHover(context).on('hover', context.ui().sidebar.hoverModeSelect), _selectBehavior, behaviorLasso(context), _modeDragNode.behavior, modeDragNote(context).behavior];
+           }

 
 

-               if (scrollWidth > clientWidth) {    // overflow happening
-                   element.classed('narrow', true);
-                   if (!_needWidth[selector]) {
-                       _needWidth[selector] = scrollWidth;
-                   }
+           _behaviors.forEach(context.install);

 
 

-               } else if (scrollWidth >= needed) {
-                   element.classed('narrow', false);
-               }
-           };
+           keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on(['[', 'pgup'], previousVertex).on([']', 'pgdown'], nextVertex).on(['{', uiCmd('⌘['), 'home'], firstVertex).on(['}', uiCmd('⌘]'), 'end'], lastVertex).on(uiCmd('⇧←'), nudgeSelection([-10, 0])).on(uiCmd('⇧↑'), nudgeSelection([0, -10])).on(uiCmd('⇧→'), nudgeSelection([10, 0])).on(uiCmd('⇧↓'), nudgeSelection([0, 10])).on(uiCmd('⇧⌥←'), nudgeSelection([-100, 0])).on(uiCmd('⇧⌥↑'), nudgeSelection([0, -100])).on(uiCmd('⇧⌥→'), nudgeSelection([100, 0])).on(uiCmd('⇧⌥↓'), nudgeSelection([0, 100])).on(utilKeybinding.plusKeys.map(function (key) {
+             return uiCmd('⇧' + key);
+           }), scaleSelection(1.05)).on(utilKeybinding.plusKeys.map(function (key) {
+             return uiCmd('⇧⌥' + key);
+           }), scaleSelection(Math.pow(1.05, 5))).on(utilKeybinding.minusKeys.map(function (key) {
+             return uiCmd('⇧' + key);
+           }), scaleSelection(1 / 1.05)).on(utilKeybinding.minusKeys.map(function (key) {
+             return uiCmd('⇧⌥' + key);
+           }), scaleSelection(1 / Math.pow(1.05, 5))).on(['\\', 'pause'], focusNextParent).on(uiCmd('⌘↑'), selectParent).on(uiCmd('⌘↓'), selectChild).on('⎋', esc, true);
+           select(document).call(keybinding);
+           context.ui().sidebar.select(selectedIDs, _newFeature);
+           context.history().on('change.select', function () {
+             loadOperations(); // reselect after change in case relation members were removed or added

 
 

-           ui.togglePanes = function(showPane) {
-               var shownPanes = context.container().selectAll('.map-pane.shown');
+             selectElements();
+           }).on('undone.select', checkSelectedIDs).on('redone.select', checkSelectedIDs);
+           context.map().on('drawn.select', selectElements).on('crossEditableZoom.select', function () {
+             selectElements();

 
 

-               var side = _mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left';
+             _breatheBehavior.restartIfNeeded(context.surface());
+           });
+           context.map().doubleUpHandler().on('doubleUp.modeSelect', didDoubleUp);
+           selectElements();

 
 

-               shownPanes
-                   .classed('shown', false);
+           if (_follow) {
+             var extent = geoExtent();
+             var graph = context.graph();
+             selectedIDs.forEach(function (id) {
+               var entity = context.entity(id);

 
 

-               context.container().selectAll('.map-pane-control button')
-                   .classed('active', false);
+               extent._extend(entity.extent(graph));
+             });
+             var loc = extent.center();
+             context.map().centerEase(loc); // we could enter the mode multiple times, so reset follow for next time

 
 

-               if (showPane) {
-                   shownPanes
-                       .style('display', 'none')
-                       .style(side, '-500px');
+             _follow = false;
+           }

 
 

-                   context.container().selectAll('.' + showPane.attr('pane') + '-control button')
-                       .classed('active', true);
+           function nudgeSelection(delta) {
+             return function () {
+               // prevent nudging during low zoom selection
+               if (!context.map().withinEditableZoom()) return;
+               var moveOp = operationMove(context, selectedIDs);

 
 

-                   showPane
-                       .classed('shown', true)
-                       .style('display', 'block');
-                   if (shownPanes.empty()) {
-                       showPane
-                           .style('display', 'block')
-                           .style(side, '-500px')
-                           .transition()
-                           .duration(200)
-                           .style(side, '0px');
-                   } else {
-                       showPane
-                           .style(side, '0px');
-                   }
+               if (moveOp.disabled()) {
+                 context.ui().flash.duration(4000).iconName('#iD-operation-' + moveOp.id).iconClass('operation disabled').label(moveOp.tooltip)();

                } else {
                } else {

-                   shownPanes
-                       .style('display', 'block')
-                       .style(side, '0px')
-                       .transition()
-                       .duration(200)
-                       .style(side, '-500px')
-                       .on('end', function() {
-                           select(this).style('display', 'none');
-                       });
+                 context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
+                 context.validator().validate();

                }
                }

-           };
+             };
+           }

 
 

+           function scaleSelection(factor) {
+             return function () {
+               // prevent scaling during low zoom selection
+               if (!context.map().withinEditableZoom()) return;
+               var nodes = utilGetAllNodes(selectedIDs, context.graph());
+               var isUp = factor > 1; // can only scale if multiple nodes are selected
+
+               if (nodes.length <= 1) return;
+               var extent = utilTotalExtent(selectedIDs, context.graph()); // These disabled checks would normally be handled by an operation
+               // object, but we don't want an actual scale operation at this point.
+
+               function scalingDisabled() {
+                 if (tooSmall()) {
+                   return 'too_small';
+                 } else if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+                   return 'too_large';
+                 } else if (someMissing() || selectedIDs.some(incompleteRelation)) {
+                   return 'not_downloaded';
+                 } else if (selectedIDs.some(context.hasHiddenConnections)) {
+                   return 'connected_to_hidden';
+                 }

 
 

-           var _editMenu = uiEditMenu(context);
+                 return false;

 
 

-           ui.editMenu = function() {
-               return _editMenu;
-           };
+                 function tooSmall() {
+                   if (isUp) return false;
+                   var dLon = Math.abs(extent[1][0] - extent[0][0]);
+                   var dLat = Math.abs(extent[1][1] - extent[0][1]);
+                   return dLon < geoMetersToLon(1, extent[1][1]) && dLat < geoMetersToLat(1);
+                 }

 
 

-           ui.showEditMenu = function(anchorPoint, triggerType, operations) {
+                 function someMissing() {
+                   if (context.inIntro()) return false;
+                   var osm = context.connection();

 
 

-               // remove any displayed menu
-               ui.closeEditMenu();
+                   if (osm) {
+                     var missing = nodes.filter(function (n) {
+                       return !osm.isDataLoaded(n.loc);
+                     });

 
 

-               if (!operations && context.mode().operations) { operations = context.mode().operations(); }
-               if (!operations || !operations.length) { return; }
+                     if (missing.length) {
+                       missing.forEach(function (loc) {
+                         context.loadTileAtLoc(loc);
+                       });
+                       return true;
+                     }
+                   }

 
 

-               // disable menu if in wide selection, for example
-               if (!context.map().editableDataEnabled()) { return; }
+                   return false;
+                 }

 
 

-               var surfaceNode = context.surface().node();
-               if (surfaceNode.focus) {   // FF doesn't support it
-                   // focus the surface or else clicking off the menu may not trigger modeBrowse
-                   surfaceNode.focus();
+                 function incompleteRelation(id) {
+                   var entity = context.entity(id);
+                   return entity.type === 'relation' && !entity.isComplete(context.graph());
+                 }

                }
 
                }
 

-               operations.forEach(function(operation) {
-                   if (operation.point) { operation.point(anchorPoint); }
-               });
+               var disabled = scalingDisabled();

 
 

-               _editMenu
-                   .anchorLoc(anchorPoint)
-                   .triggerType(triggerType)
-                   .operations(operations);
+               if (disabled) {
+                 var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+                 context.ui().flash.duration(4000).iconName('#iD-icon-no').iconClass('operation disabled').label(_t('operations.scale.' + disabled + '.' + multi))();
+               } else {
+                 var pivot = context.projection(extent.center());
+                 var annotation = _t('operations.scale.annotation.' + (isUp ? 'up' : 'down') + '.feature', {
+                   n: selectedIDs.length
+                 });
+                 context.perform(actionScale(selectedIDs, pivot, factor, context.projection), annotation);
+                 context.validator().validate();
+               }
+             };
+           }

 
 

-               // render the menu
-               context.map().supersurface.call(_editMenu);
-           };
+           function didDoubleUp(d3_event, loc) {
+             if (!context.map().withinEditableZoom()) return;
+             var target = select(d3_event.target);
+             var datum = target.datum();
+             var entity = datum && datum.properties && datum.properties.entity;
+             if (!entity) return;
+
+             if (entity instanceof osmWay && target.classed('target')) {
+               var choice = geoChooseEdge(context.graph().childNodes(entity), loc, context.projection);
+               var prev = entity.nodes[choice.index - 1];
+               var next = entity.nodes[choice.index];
+               context.perform(actionAddMidpoint({
+                 loc: choice.loc,
+                 edge: [prev, next]
+               }, osmNode()), _t('operations.add.annotation.vertex'));
+               context.validator().validate();
+             } else if (entity.type === 'midpoint') {
+               context.perform(actionAddMidpoint({
+                 loc: entity.loc,
+                 edge: entity.edge
+               }, osmNode()), _t('operations.add.annotation.vertex'));
+               context.validator().validate();
+             }
+           }

 
 

-           ui.closeEditMenu = function() {
-               // remove any existing menu no matter how it was added
-               context.map().supersurface
-                   .select('.edit-menu').remove();
-           };
+           function selectElements() {
+             if (!checkSelectedIDs()) return;
+             var surface = context.surface();
+             surface.selectAll('.selected-member').classed('selected-member', false);
+             surface.selectAll('.selected').classed('selected', false);
+             surface.selectAll('.related').classed('related', false); // reload `_focusedParentWayId` based on the current selection

 
 

+             checkFocusedParent();

 
 

-           var _saveLoading = select(null);
+             if (_focusedParentWayId) {
+               surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
+             }

 
 

-           context.uploader()
-               .on('saveStarted.ui', function() {
-                   _saveLoading = uiLoading(context)
-                       .message(_t('save.uploading'))
-                       .blocking(true);
-                   context.container().call(_saveLoading);  // block input during upload
-               })
-               .on('saveEnded.ui', function() {
-                   _saveLoading.close();
-                   _saveLoading = select(null);
-               });
+             if (context.map().withinEditableZoom()) {
+               // Apply selection styling if not in wide selection
+               surface.selectAll(utilDeepMemberSelector(selectedIDs, context.graph(), true
+               /* skipMultipolgonMembers */
+               )).classed('selected-member', true);
+               surface.selectAll(utilEntityOrDeepMemberSelector(selectedIDs, context.graph())).classed('selected', true);
+             }
+           }

 
 

-           return ui;
-       }
+           function esc() {
+             if (context.container().select('.combobox').size()) return;
+             context.enter(modeBrowse(context));
+           }

 
 

-       function coreContext() {
-         var this$1 = this;
+           function firstVertex(d3_event) {
+             d3_event.preventDefault();
+             var entity = singular();
+             var parentId = parentWayIdForVertexNavigation();
+             var way;

 
 

-         var dispatch$1 = dispatch('enter', 'exit', 'change');
-         var context = utilRebind({}, dispatch$1, 'on');
-         var _deferred = new Set();
+             if (entity && entity.type === 'way') {
+               way = entity;
+             } else if (parentId) {
+               way = context.entity(parentId);
+             }

 
 

-         context.version = '2.18.4';
-         context.privacyVersion = '20200407';
+             _focusedParentWayId = way && way.id;

 
 

-         // iD will alter the hash so cache the parameters intended to setup the session
-         context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
+             if (way) {
+               context.enter(mode.selectedIDs([way.first()]).follow(true));
+             }
+           }

 
 

-         context.isFirstSession = !corePreferences('sawSplash') && !corePreferences('sawPrivacyVersion');
+           function lastVertex(d3_event) {
+             d3_event.preventDefault();
+             var entity = singular();
+             var parentId = parentWayIdForVertexNavigation();
+             var way;

 
 

+             if (entity && entity.type === 'way') {
+               way = entity;
+             } else if (parentId) {
+               way = context.entity(parentId);
+             }

 
 

-         /* Changeset */
-         // An osmChangeset object. Not loaded until needed.
-         context.changeset = null;
+             _focusedParentWayId = way && way.id;

 
 

-         var _defaultChangesetComment = context.initialHashParams.comment;
-         var _defaultChangesetSource = context.initialHashParams.source;
-         var _defaultChangesetHashtags = context.initialHashParams.hashtags;
-         context.defaultChangesetComment = function(val) {
-           if (!arguments.length) { return _defaultChangesetComment; }
-           _defaultChangesetComment = val;
-           return context;
-         };
-         context.defaultChangesetSource = function(val) {
-           if (!arguments.length) { return _defaultChangesetSource; }
-           _defaultChangesetSource = val;
-           return context;
-         };
-         context.defaultChangesetHashtags = function(val) {
-           if (!arguments.length) { return _defaultChangesetHashtags; }
-           _defaultChangesetHashtags = val;
-           return context;
-         };
+             if (way) {
+               context.enter(mode.selectedIDs([way.last()]).follow(true));
+             }
+           }

 
 

-         /* Document title */
-         /* (typically shown as the label for the browser window/tab) */
+           function previousVertex(d3_event) {
+             d3_event.preventDefault();
+             var parentId = parentWayIdForVertexNavigation();
+             _focusedParentWayId = parentId;
+             if (!parentId) return;
+             var way = context.entity(parentId);
+             var length = way.nodes.length;
+             var curr = way.nodes.indexOf(selectedIDs[0]);
+             var index = -1;
+
+             if (curr > 0) {
+               index = curr - 1;
+             } else if (way.isClosed()) {
+               index = length - 2;
+             }

 
 

-         // If true, iD will update the title based on what the user is doing
-         var _setsDocumentTitle = true;
-         context.setsDocumentTitle = function(val) {
-           if (!arguments.length) { return _setsDocumentTitle; }
-           _setsDocumentTitle = val;
-           return context;
-         };
-         // The part of the title that is always the same
-         var _documentTitleBase = document.title;
-         context.documentTitleBase = function(val) {
-           if (!arguments.length) { return _documentTitleBase; }
-           _documentTitleBase = val;
-           return context;
-         };
+             if (index !== -1) {
+               context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
+             }
+           }

 
 

+           function nextVertex(d3_event) {
+             d3_event.preventDefault();
+             var parentId = parentWayIdForVertexNavigation();
+             _focusedParentWayId = parentId;
+             if (!parentId) return;
+             var way = context.entity(parentId);
+             var length = way.nodes.length;
+             var curr = way.nodes.indexOf(selectedIDs[0]);
+             var index = -1;
+
+             if (curr < length - 1) {
+               index = curr + 1;
+             } else if (way.isClosed()) {
+               index = 0;
+             }

 
 

-         /* User interface and keybinding */
-         var _ui;
-         context.ui = function () { return _ui; };
-         context.lastPointerType = function () { return _ui.lastPointerType(); };
+             if (index !== -1) {
+               context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
+             }
+           }

 
 

-         var _keybinding = utilKeybinding('context');
-         context.keybinding = function () { return _keybinding; };
-         select(document).call(_keybinding);
+           function focusNextParent(d3_event) {
+             d3_event.preventDefault();
+             var parents = parentWaysIdsOfSelection(true);
+             if (!parents || parents.length < 2) return;
+             var index = parents.indexOf(_focusedParentWayId);

 
 

+             if (index < 0 || index > parents.length - 2) {
+               _focusedParentWayId = parents[0];
+             } else {
+               _focusedParentWayId = parents[index + 1];
+             }

 
 

-         /* Straight accessors. Avoid using these if you can. */
-         // Instantiate the connection here because it doesn't require passing in
-         // `context` and it's needed for pre-init calls like `preauth`
-         var _connection = services.osm;
-         var _history;
-         var _validator;
-         var _uploader;
-         context.connection = function () { return _connection; };
-         context.history = function () { return _history; };
-         context.validator = function () { return _validator; };
-         context.uploader = function () { return _uploader; };
+             var surface = context.surface();
+             surface.selectAll('.related').classed('related', false);

 
 

-         /* Connection */
-         context.preauth = function (options) {
-           if (_connection) {
-             _connection.switch(options);
+             if (_focusedParentWayId) {
+               surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
+             }

            }
            }

-           return context;
-         };

 
 

-         /* connection options for source switcher (optional) */
-         var _apiConnections;
-         context.apiConnections = function(val) {
-           if (!arguments.length) { return _apiConnections; }
-           _apiConnections = val;
-           return context;
-         };
+           function selectParent(d3_event) {
+             d3_event.preventDefault();
+             var currentSelectedIds = mode.selectedIDs();
+             var parentIds = _focusedParentWayId ? [_focusedParentWayId] : parentWaysIdsOfSelection(false);
+             if (!parentIds.length) return;
+             context.enter(mode.selectedIDs(parentIds)); // set this after re-entering the selection since we normally want it cleared on exit

 
 

+             _focusedVertexIds = currentSelectedIds;
+           }

 
 

-         // A string or array or locale codes to prefer over the browser's settings
-         context.locale = function(locale) {
-           if (!arguments.length) { return _mainLocalizer.localeCode(); }
-           _mainLocalizer.preferredLocaleCodes(locale);
-           return context;
+           function selectChild(d3_event) {
+             d3_event.preventDefault();
+             var currentSelectedIds = mode.selectedIDs();
+             var childIds = _focusedVertexIds ? _focusedVertexIds.filter(function (id) {
+               return context.hasEntity(id);
+             }) : childNodeIdsOfSelection(true);
+             if (!childIds || !childIds.length) return;
+             if (currentSelectedIds.length === 1) _focusedParentWayId = currentSelectedIds[0];
+             context.enter(mode.selectedIDs(childIds));
+           }

          };
 
          };
 

+         mode.exit = function () {
+           // we could enter the mode multiple times but it's only new the first time
+           _newFeature = false;
+           _focusedVertexIds = null;

 
 

-         function afterLoad(cid, callback) {
-           return function (err, result) {
-             if (err) {
-               // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
-               if (err.status === 400 || err.status === 401 || err.status === 403) {
-                 if (_connection) {
-                   _connection.logout();
-                 }
-               }
-               if (typeof callback === 'function') {
-                 callback(err);
-               }
-               return;
-
-             } else if (_connection && _connection.getConnectionId() !== cid) {
-               if (typeof callback === 'function') {
-                 callback({ message: 'Connection Switched', status: -1 });
-               }
-               return;
-
-             } else {
-               _history.merge(result.data, result.extent);
-               if (typeof callback === 'function') {
-                 callback(err, result);
-               }
-               return;
-             }
-           };
-         }
-
-
-         context.loadTiles = function (projection, callback) {
-           var handle = window.requestIdleCallback(function () {
-             _deferred.delete(handle);
-             if (_connection && context.editableDataEnabled()) {
-               var cid = _connection.getConnectionId();
-               _connection.loadTiles(projection, afterLoad(cid, callback));
+           _operations.forEach(function (operation) {
+             if (operation.behavior) {
+               context.uninstall(operation.behavior);

              }
            });
              }
            });

-           _deferred.add(handle);
-         };

 
 

-         context.loadTileAtLoc = function (loc, callback) {
-           var handle = window.requestIdleCallback(function () {
-             _deferred.delete(handle);
-             if (_connection && context.editableDataEnabled()) {
-               var cid = _connection.getConnectionId();
-               _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
-             }
-           });
-           _deferred.add(handle);
-         };
+           _operations = [];

 
 

-         context.loadEntity = function (entityID, callback) {
-           if (_connection) {
-             var cid = _connection.getConnectionId();
-             _connection.loadEntity(entityID, afterLoad(cid, callback));
+           _behaviors.forEach(context.uninstall);
+
+           select(document).call(keybinding.unbind);
+           context.ui().closeEditMenu();
+           context.history().on('change.select', null).on('undone.select', null).on('redone.select', null);
+           var surface = context.surface();
+           surface.selectAll('.selected-member').classed('selected-member', false);
+           surface.selectAll('.selected').classed('selected', false);
+           surface.selectAll('.highlighted').classed('highlighted', false);
+           surface.selectAll('.related').classed('related', false);
+           context.map().on('drawn.select', null);
+           context.ui().sidebar.hide();
+           context.features().forceVisible([]);
+           var entity = singular();
+
+           if (_newFeature && entity && entity.type === 'relation' && // no tags
+           Object.keys(entity.tags).length === 0 && // no parent relations
+           context.graph().parentRelations(entity).length === 0 && ( // no members or one member with no role
+           entity.members.length === 0 || entity.members.length === 1 && !entity.members[0].role)) {
+             // the user added this relation but didn't edit it at all, so just delete it
+             var deleteAction = actionDeleteRelation(entity.id, true
+             /* don't delete untagged members */
+             );
+             context.perform(deleteAction, _t('operations.delete.annotation.relation'));
+             context.validator().validate();

            }
          };
 
            }
          };
 

-         context.zoomToEntity = function (entityID, zoomTo) {
-           if (zoomTo !== false) {
-             context.loadEntity(entityID, function (err, result) {
-               if (err) { return; }
-               var entity = result.data.find(function (e) { return e.id === entityID; });
-               if (entity) {
-                 _map.zoomTo(entity);
-               }
-             });
-           }
+         return mode;
+       }

 
 

-           _map.on('drawn.zoomToEntity', function () {
-             if (!context.hasEntity(entityID)) { return; }
-             _map.on('drawn.zoomToEntity', null);
-             context.on('enter.zoomToEntity', null);
-             context.enter(modeSelect(context, [entityID]));
-           });
+       function uiLasso(context) {
+         var group, polygon;
+         lasso.coordinates = [];

 
 

-           context.on('enter.zoomToEntity', function () {
-             if (_mode.id !== 'browse') {
-               _map.on('drawn.zoomToEntity', null);
-               context.on('enter.zoomToEntity', null);
-             }
-           });
-         };
+         function lasso(selection) {
+           context.container().classed('lasso', true);
+           group = selection.append('g').attr('class', 'lasso hide');
+           polygon = group.append('path').attr('class', 'lasso-path');
+           group.call(uiToggle(true));
+         }

 
 

-         var _minEditableZoom = 16;
-         context.minEditableZoom = function(val) {
-           if (!arguments.length) { return _minEditableZoom; }
-           _minEditableZoom = val;
-           if (_connection) {
-             _connection.tileZoom(val);
+         function draw() {
+           if (polygon) {
+             polygon.data([lasso.coordinates]).attr('d', function (d) {
+               return 'M' + d.join(' L') + ' Z';
+             });

            }
            }

-           return context;
+         }
+
+         lasso.extent = function () {
+           return lasso.coordinates.reduce(function (extent, point) {
+             return extent.extend(geoExtent(point));
+           }, geoExtent());

          };
 
          };
 

-         // String length limits in Unicode characters, not JavaScript UTF-16 code units
-         context.maxCharsForTagKey = function () { return 255; };
-         context.maxCharsForTagValue = function () { return 255; };
-         context.maxCharsForRelationRole = function () { return 255; };
+         lasso.p = function (_) {
+           if (!arguments.length) return lasso;
+           lasso.coordinates.push(_);
+           draw();
+           return lasso;
+         };

 
 

-         function cleanOsmString(val, maxChars) {
-           // be lenient with input
-           if (val === undefined || val === null) {
-             val = '';
-           } else {
-             val = val.toString();
+         lasso.close = function () {
+           if (group) {
+             group.call(uiToggle(false, function () {
+               select(this).remove();
+             }));

            }
 
            }
 

-           // remove whitespace
-           val = val.trim();
-
-           // use the canonical form of the string
-           if (val.normalize) { val = val.normalize('NFC'); }
+           context.container().classed('lasso', false);
+         };

 
 

-           // trim to the number of allowed characters
-           return utilUnicodeCharsTruncated(val, maxChars);
-         }
-         context.cleanTagKey = function (val) { return cleanOsmString(val, context.maxCharsForTagKey()); };
-         context.cleanTagValue = function (val) { return cleanOsmString(val, context.maxCharsForTagValue()); };
-         context.cleanRelationRole = function (val) { return cleanOsmString(val, context.maxCharsForRelationRole()); };
+         return lasso;
+       }

 
 

+       function behaviorLasso(context) {
+         // use pointer events on supported platforms; fallback to mouse events
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';

 
 

-         /* History */
-         var _inIntro = false;
-         context.inIntro = function(val) {
-           if (!arguments.length) { return _inIntro; }
-           _inIntro = val;
-           return context;
-         };
+         var behavior = function behavior(selection) {
+           var lasso;

 
 

-         // Immediately save the user's history to localstorage, if possible
-         // This is called someteimes, but also on the `window.onbeforeunload` handler
-         context.save = function () {
-           // no history save, no message onbeforeunload
-           if (_inIntro || context.container().select('.modal').size()) { return; }
+           function pointerdown(d3_event) {
+             var button = 0; // left

 
 

-           var canSave;
-           if (_mode && _mode.id === 'save') {
-             canSave = false;
+             if (d3_event.button === button && d3_event.shiftKey === true) {
+               lasso = null;
+               select(window).on(_pointerPrefix + 'move.lasso', pointermove).on(_pointerPrefix + 'up.lasso', pointerup);
+               d3_event.stopPropagation();
+             }
+           }

 
 

-             // Attempt to prevent user from creating duplicate changes - see #5200
-             if (services.osm && services.osm.isChangesetInflight()) {
-               _history.clearSaved();
-               return;
+           function pointermove() {
+             if (!lasso) {
+               lasso = uiLasso(context);
+               context.surface().call(lasso);

              }
 
              }
 

-           } else {
-             canSave = context.selectedIDs().every(function (id) {
-               var entity = context.hasEntity(id);
-               return entity && !entity.isDegenerate();
-             });
+             lasso.p(context.map().mouse());

            }
 
            }
 

-           if (canSave) {
-             _history.save();
+           function normalize(a, b) {
+             return [[Math.min(a[0], b[0]), Math.min(a[1], b[1])], [Math.max(a[0], b[0]), Math.max(a[1], b[1])]];

            }
            }

-           if (_history.hasChanges()) {
-             return _t('save.unsaved_changes');
-           }
-         };

 
 

-         // Debounce save, since it's a synchronous localStorage write,
-         // and history changes can happen frequently (e.g. when dragging).
-         context.debouncedSave = debounce(context.save, 350);
+           function lassoed() {
+             if (!lasso) return [];
+             var graph = context.graph();
+             var limitToNodes;

 
 

-         function withDebouncedSave(fn) {
-           return function() {
-             var result = fn.apply(_history, arguments);
-             context.debouncedSave();
-             return result;
-           };
-         }
+             if (context.map().editableDataEnabled(true
+             /* skipZoomCheck */
+             ) && context.map().isInWideSelection()) {
+               // only select from the visible nodes
+               limitToNodes = new Set(utilGetAllNodes(context.selectedIDs(), graph));
+             } else if (!context.map().editableDataEnabled()) {
+               return [];
+             }

 
 

+             var bounds = lasso.extent().map(context.projection.invert);
+             var extent = geoExtent(normalize(bounds[0], bounds[1]));
+             var intersects = context.history().intersects(extent).filter(function (entity) {
+               return entity.type === 'node' && (!limitToNodes || limitToNodes.has(entity)) && geoPointInPolygon(context.projection(entity.loc), lasso.coordinates) && !context.features().isHidden(entity, graph, entity.geometry(graph));
+             }); // sort the lassoed nodes as best we can

 
 

-         /* Graph */
-         context.hasEntity = function (id) { return _history.graph().hasEntity(id); };
-         context.entity = function (id) { return _history.graph().entity(id); };
+             intersects.sort(function (node1, node2) {
+               var parents1 = graph.parentWays(node1);
+               var parents2 = graph.parentWays(node2);

 
 

+               if (parents1.length && parents2.length) {
+                 // both nodes are vertices
+                 var sharedParents = utilArrayIntersection(parents1, parents2);

 
 

-         /* Modes */
-         var _mode;
-         context.mode = function () { return _mode; };
-         context.enter = function (newMode) {
-           if (_mode) {
-             _mode.exit();
-             dispatch$1.call('exit', this$1, _mode);
+                 if (sharedParents.length) {
+                   var sharedParentNodes = sharedParents[0].nodes; // vertices are members of the same way; sort them in their listed order
+
+                   return sharedParentNodes.indexOf(node1.id) - sharedParentNodes.indexOf(node2.id);
+                 } else {
+                   // vertices do not share a way; group them by their respective parent ways
+                   return parseFloat(parents1[0].id.slice(1)) - parseFloat(parents2[0].id.slice(1));
+                 }
+               } else if (parents1.length || parents2.length) {
+                 // only one node is a vertex; sort standalone points before vertices
+                 return parents1.length - parents2.length;
+               } // both nodes are standalone points; sort left to right
+
+
+               return node1.loc[0] - node2.loc[0];
+             });
+             return intersects.map(function (entity) {
+               return entity.id;
+             });

            }
 
            }
 

-           _mode = newMode;
-           _mode.enter();
-           dispatch$1.call('enter', this$1, _mode);
-         };
+           function pointerup() {
+             select(window).on(_pointerPrefix + 'move.lasso', null).on(_pointerPrefix + 'up.lasso', null);
+             if (!lasso) return;
+             var ids = lassoed();
+             lasso.close();

 
 

-         context.selectedIDs = function () { return (_mode && _mode.selectedIDs && _mode.selectedIDs()) || []; };
-         context.activeID = function () { return _mode && _mode.activeID && _mode.activeID(); };
+             if (ids.length) {
+               context.enter(modeSelect(context, ids));
+             }
+           }

 
 

-         var _selectedNoteID;
-         context.selectedNoteID = function(noteID) {
-           if (!arguments.length) { return _selectedNoteID; }
-           _selectedNoteID = noteID;
-           return context;
+           selection.on(_pointerPrefix + 'down.lasso', pointerdown);

          };
 
          };
 

-         // NOTE: Don't change the name of this until UI v3 is merged
-         var _selectedErrorID;
-         context.selectedErrorID = function(errorID) {
-           if (!arguments.length) { return _selectedErrorID; }
-           _selectedErrorID = errorID;
-           return context;
+         behavior.off = function (selection) {
+           selection.on(_pointerPrefix + 'down.lasso', null);

          };
 
          };
 

+         return behavior;
+       }

 
 

-         /* Behaviors */
-         context.install = function (behavior) { return context.surface().call(behavior); };
-         context.uninstall = function (behavior) { return context.surface().call(behavior.off); };
+       function modeBrowse(context) {
+         var mode = {
+           button: 'browse',
+           id: 'browse',
+           title: _t('modes.browse.title'),
+           description: _t('modes.browse.description')
+         };
+         var sidebar;

 
 

+         var _selectBehavior;

 
 

-         /* Copy/Paste */
-         var _copyGraph;
-         context.copyGraph = function () { return _copyGraph; };
+         var _behaviors = [];

 
 

-         var _copyIDs = [];
-         context.copyIDs = function(val) {
-           if (!arguments.length) { return _copyIDs; }
-           _copyIDs = val;
-           _copyGraph = _history.graph();
-           return context;
+         mode.selectBehavior = function (val) {
+           if (!arguments.length) return _selectBehavior;
+           _selectBehavior = val;
+           return mode;

          };
 
          };
 

-         var _copyLonLat;
-         context.copyLonLat = function(val) {
-           if (!arguments.length) { return _copyLonLat; }
-           _copyLonLat = val;
-           return context;
-         };
+         mode.enter = function () {
+           if (!_behaviors.length) {
+             if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
+             _behaviors = [behaviorPaste(context), behaviorHover(context).on('hover', context.ui().sidebar.hover), _selectBehavior, behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+           }

 
 

+           _behaviors.forEach(context.install); // Get focus on the body.

 
 

-         /* Background */
-         var _background;
-         context.background = function () { return _background; };

 
 

+           if (document.activeElement && document.activeElement.blur) {
+             document.activeElement.blur();
+           }

 
 

-         /* Features */
-         var _features;
-         context.features = function () { return _features; };
-         context.hasHiddenConnections = function (id) {
-           var graph = _history.graph();
-           var entity = graph.entity(id);
-           return _features.hasHiddenConnections(entity, graph);
+           if (sidebar) {
+             context.ui().sidebar.show(sidebar);
+           } else {
+             context.ui().sidebar.select(null);
+           }

          };
 
          };
 

+         mode.exit = function () {
+           context.ui().sidebar.hover.cancel();

 
 

-         /* Photos */
-         var _photos;
-         context.photos = function () { return _photos; };
-
+           _behaviors.forEach(context.uninstall);

 
 

-         /* Map */
-         var _map;
-         context.map = function () { return _map; };
-         context.layers = function () { return _map.layers(); };
-         context.surface = function () { return _map.surface; };
-         context.editableDataEnabled = function () { return _map.editableDataEnabled(); };
-         context.surfaceRect = function () { return _map.surface.node().getBoundingClientRect(); };
-         context.editable = function () {
-           // don't allow editing during save
-           var mode = context.mode();
-           if (!mode || mode.id === 'save') { return false; }
-           return _map.editableDataEnabled();
+           if (sidebar) {
+             context.ui().sidebar.hide();
+           }

          };
 
          };
 

-
-         /* Debug */
-         var _debugFlags = {
-           tile: false,        // tile boundaries
-           collision: false,   // label collision bounding boxes
-           imagery: false,     // imagery bounding polygons
-           target: false,      // touch targets
-           downloaded: false   // downloaded data from osm
-         };
-         context.debugFlags = function () { return _debugFlags; };
-         context.getDebug = function (flag) { return flag && _debugFlags[flag]; };
-         context.setDebug = function(flag, val) {
-           if (arguments.length === 1) { val = true; }
-           _debugFlags[flag] = val;
-           dispatch$1.call('change');
-           return context;
+         mode.sidebar = function (_) {
+           if (!arguments.length) return sidebar;
+           sidebar = _;
+           return mode;

          };
 
          };
 

-
-         /* Container */
-         var _container = select(null);
-         context.container = function(val) {
-           if (!arguments.length) { return _container; }
-           _container = val;
-           _container.classed('ideditor', true);
-           return context;
-         };
-         context.containerNode = function(val) {
-           if (!arguments.length) { return context.container().node(); }
-           context.container(select(val));
-           return context;
+         mode.operations = function () {
+           return [operationPaste(context)];

          };
 
          };
 

-         var _embed;
-         context.embed = function(val) {
-           if (!arguments.length) { return _embed; }
-           _embed = val;
-           return context;
-         };
+         return mode;
+       }

 
 

+       function behaviorAddWay(context) {
+         var dispatch = dispatch$8('start', 'startFromWay', 'startFromNode');
+         var draw = behaviorDraw(context);

 
 

-         /* Assets */
-         var _assetPath = '';
-         context.assetPath = function(val) {
-           if (!arguments.length) { return _assetPath; }
-           _assetPath = val;
-           _mainFileFetcher.assetPath(val);
-           return context;
-         };
+         function behavior(surface) {
+           draw.on('click', function () {
+             dispatch.apply('start', this, arguments);
+           }).on('clickWay', function () {
+             dispatch.apply('startFromWay', this, arguments);
+           }).on('clickNode', function () {
+             dispatch.apply('startFromNode', this, arguments);
+           }).on('cancel', behavior.cancel).on('finish', behavior.cancel);
+           context.map().dblclickZoomEnable(false);
+           surface.call(draw);
+         }

 
 

-         var _assetMap = {};
-         context.assetMap = function(val) {
-           if (!arguments.length) { return _assetMap; }
-           _assetMap = val;
-           _mainFileFetcher.assetMap(val);
-           return context;
+         behavior.off = function (surface) {
+           surface.call(draw.off);

          };
 
          };
 

-         context.asset = function (val) {
-           if (/^http(s)?:\/\//i.test(val)) { return val; }
-           var filename = _assetPath + val;
-           return _assetMap[filename] || filename;
+         behavior.cancel = function () {
+           window.setTimeout(function () {
+             context.map().dblclickZoomEnable(true);
+           }, 1000);
+           context.enter(modeBrowse(context));

          };
 
          };
 

-         context.imagePath = function (val) { return context.asset(("img/" + val)); };
+         return utilRebind(behavior, dispatch, 'on');
+       }

 
 

+       function behaviorHash(context) {
+         // cached window.location.hash
+         var _cachedHash = null; // allowable latitude range
+
+         var _latitudeLimit = 90 - 1e-8;
+
+         function computedHashParameters() {
+           var map = context.map();
+           var center = map.center();
+           var zoom = map.zoom();
+           var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
+           var oldParams = utilObjectOmit(utilStringQs(window.location.hash), ['comment', 'source', 'hashtags', 'walkthrough']);
+           var newParams = {};
+           delete oldParams.id;
+           var selected = context.selectedIDs().filter(function (id) {
+             return context.hasEntity(id);
+           });

 
 

-         /* reset (aka flush) */
-         context.reset = context.flush = function () {
-           context.debouncedSave.cancel();
+           if (selected.length) {
+             newParams.id = selected.join(',');
+           }

 
 

-           Array.from(_deferred).forEach(function (handle) {
-             window.cancelIdleCallback(handle);
-             _deferred.delete(handle);
+           newParams.map = zoom.toFixed(2) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
+           return Object.assign(oldParams, newParams);
+         }
+
+         function computedHash() {
+           return '#' + utilQsString(computedHashParameters(), true);
+         }
+
+         function computedTitle(includeChangeCount) {
+           var baseTitle = context.documentTitleBase() || 'iD';
+           var contextual;
+           var changeCount;
+           var titleID;
+           var selected = context.selectedIDs().filter(function (id) {
+             return context.hasEntity(id);

            });
 
            });
 

-           Object.values(services).forEach(function (service) {
-             if (service && typeof service.reset === 'function') {
-               service.reset(context);
+           if (selected.length) {
+             var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
+
+             if (selected.length > 1) {
+               contextual = _t('title.labeled_and_more', {
+                 labeled: firstLabel,
+                 count: selected.length - 1
+               });
+             } else {
+               contextual = firstLabel;

              }
              }

-           });

 
 

-           context.changeset = null;
+             titleID = 'context';
+           }

 
 

-           _validator.reset();
-           _features.reset();
-           _history.reset();
-           _uploader.reset();
+           if (includeChangeCount) {
+             changeCount = context.history().difference().summary().length;

 
 

-           // don't leave stale state in the inspector
-           context.container().select('.inspector-wrap *').remove();
+             if (changeCount > 0) {
+               titleID = contextual ? 'changes_context' : 'changes';
+             }
+           }

 
 

-           return context;
-         };
+           if (titleID) {
+             return _t('title.format.' + titleID, {
+               changes: changeCount,
+               base: baseTitle,
+               context: contextual
+             });
+           }

 
 

+           return baseTitle;
+         }

 
 

-         /* Projections */
-         context.projection = geoRawMercator();
-         context.curtainProjection = geoRawMercator();
+         function updateTitle(includeChangeCount) {
+           if (!context.setsDocumentTitle()) return;
+           var newTitle = computedTitle(includeChangeCount);

 
 

+           if (document.title !== newTitle) {
+             document.title = newTitle;
+           }
+         }

 
 

-         /* Init */
-         context.init = function () {
+         function updateHashIfNeeded() {
+           if (context.inIntro()) return;
+           var latestHash = computedHash();

 
 

-           instantiateInternal();
+           if (_cachedHash !== latestHash) {
+             _cachedHash = latestHash; // Update the URL hash without affecting the browser navigation stack,
+             // though unavoidably creating a browser history entry

 
 

-           initializeDependents();
+             window.history.replaceState(null, computedTitle(false
+             /* includeChangeCount */
+             ), latestHash); // set the title we want displayed for the browser tab/window

 
 

-           return context;
+             updateTitle(true
+             /* includeChangeCount */
+             );
+           }
+         }

 
 

-           // Load variables and properties. No property of `context` should be accessed
-           // until this is complete since load statuses are indeterminate. The order
-           // of instantiation shouldn't matter.
-           function instantiateInternal() {
+         var _throttledUpdate = throttle(updateHashIfNeeded, 500);

 
 

-             _history = coreHistory(context);
-             context.graph = _history.graph;
-             context.pauseChangeDispatch = _history.pauseChangeDispatch;
-             context.resumeChangeDispatch = _history.resumeChangeDispatch;
-             context.perform = withDebouncedSave(_history.perform);
-             context.replace = withDebouncedSave(_history.replace);
-             context.pop = withDebouncedSave(_history.pop);
-             context.overwrite = withDebouncedSave(_history.overwrite);
-             context.undo = withDebouncedSave(_history.undo);
-             context.redo = withDebouncedSave(_history.redo);
+         var _throttledUpdateTitle = throttle(function () {
+           updateTitle(true
+           /* includeChangeCount */
+           );
+         }, 500);
+
+         function hashchange() {
+           // ignore spurious hashchange events
+           if (window.location.hash === _cachedHash) return;
+           _cachedHash = window.location.hash;
+           var q = utilStringQs(_cachedHash);
+           var mapArgs = (q.map || '').split('/').map(Number);
+
+           if (mapArgs.length < 3 || mapArgs.some(isNaN)) {
+             // replace bogus hash
+             updateHashIfNeeded();
+           } else {
+             // don't update if the new hash already reflects the state of iD
+             if (_cachedHash === computedHash()) return;
+             var mode = context.mode();
+             context.map().centerZoom([mapArgs[2], Math.min(_latitudeLimit, Math.max(-_latitudeLimit, mapArgs[1]))], mapArgs[0]);
+
+             if (q.id && mode) {
+               var ids = q.id.split(',').filter(function (id) {
+                 return context.hasEntity(id);
+               });

 
 

-             _validator = coreValidator(context);
-             _uploader = coreUploader(context);
+               if (ids.length && (mode.id === 'browse' || mode.id === 'select' && !utilArrayIdentical(mode.selectedIDs(), ids))) {
+                 context.enter(modeSelect(context, ids));
+                 return;
+               }
+             }

 
 

-             _background = rendererBackground(context);
-             _features = rendererFeatures(context);
-             _map = rendererMap(context);
-             _photos = rendererPhotos(context);
+             var center = context.map().center();
+             var dist = geoSphericalDistance(center, [mapArgs[2], mapArgs[1]]);
+             var maxdist = 500; // Don't allow the hash location to change too much while drawing
+             // This can happen if the user accidentally hit the back button.  #3996

 
 

-             _ui = uiInit(context);
+             if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
+               context.enter(modeBrowse(context));
+               return;
+             }

            }
            }

+         }

 
 

-           // Set up objects that might need to access properties of `context`. The order
-           // might matter if dependents make calls to each other. Be wary of async calls.
-           function initializeDependents() {
+         function behavior() {
+           context.map().on('move.behaviorHash', _throttledUpdate);
+           context.history().on('change.behaviorHash', _throttledUpdateTitle);
+           context.on('enter.behaviorHash', _throttledUpdate);
+           select(window).on('hashchange.behaviorHash', hashchange);

 
 

-             if (context.initialHashParams.presets) {
-               _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
+           if (window.location.hash) {
+             var q = utilStringQs(window.location.hash);
+
+             if (q.id) {
+               //if (!context.history().hasRestorableChanges()) {
+               // targeting specific features: download, select, and zoom to them
+               context.zoomToEntity(q.id.split(',')[0], !q.map); //}

              }
 
              }
 

-             if (context.initialHashParams.locale) {
-               _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
+             if (q.walkthrough === 'true') {
+               behavior.startWalkthrough = true;

              }
 
              }
 

-             // kick off some async work
-             _mainLocalizer.ensureLoaded();
-             _background.ensureLoaded();
-             _mainPresetIndex.ensureLoaded();
+             if (q.map) {
+               behavior.hadHash = true;
+             }

 
 

-             Object.values(services).forEach(function (service) {
-               if (service && typeof service.init === 'function') {
-                 service.init();
-               }
-             });
+             hashchange();
+             updateTitle(false);
+           }
+         }

 
 

-             _map.init();
-             _validator.init();
-             _features.init();
-             _photos.init();
+         behavior.off = function () {
+           _throttledUpdate.cancel();

 
 

-             if (services.maprules && context.initialHashParams.maprules) {
-               d3_json(context.initialHashParams.maprules)
-                 .then(function (mapcss) {
-                   services.maprules.init();
-                   mapcss.forEach(function (mapcssSelector) { return services.maprules.addRule(mapcssSelector); });
-                 })
-                 .catch(function () { /* ignore */ });
-             }
+           _throttledUpdateTitle.cancel();

 
 

-             // if the container isn't available, e.g. when testing, don't load the UI
-             if (!context.container().empty()) { _ui.ensureLoaded(); }
-           }
+           context.map().on('move.behaviorHash', null);
+           context.on('enter.behaviorHash', null);
+           select(window).on('hashchange.behaviorHash', null);
+           window.location.hash = '';

          };
 
          };
 

-
-         return context;
+         return behavior;

        }
 
        }
 

-       // When `debug = true`, we use `Object.freeze` on immutables in iD.

        // This is only done in testing because of the performance penalty.
        // This is only done in testing because of the performance penalty.

-       var debug = false;
+
+       var debug = false; // Reexport just what our tests use, see #4379

        var d3 = {
        var d3 = {

-         customEvent: customEvent,
-         dispatch:  dispatch,
-         event:  event,
+         dispatch: dispatch$8,

          geoMercator: mercator,
          geoProjection: projection,
          polygonArea: d3_polygonArea,
          geoMercator: mercator,
          geoProjection: projection,
          polygonArea: d3_polygonArea,


@@ -118603,6 +103499,7 @@
                actionReverse: actionReverse,
                actionRevert: actionRevert,
                actionRotate: actionRotate,
                actionReverse: actionReverse,
                actionRevert: actionRevert,
                actionRotate: actionRotate,

+               actionScale: actionScale,

                actionSplit: actionSplit,
                actionStraightenNodes: actionStraightenNodes,
                actionStraightenWay: actionStraightenWay,
                actionSplit: actionSplit,
                actionStraightenNodes: actionStraightenNodes,
                actionStraightenWay: actionStraightenWay,


@@ -118630,6 +103527,8 @@
                coreLocalizer: coreLocalizer,
                t: _t,
                localizer: _mainLocalizer,
                coreLocalizer: coreLocalizer,
                t: _t,
                localizer: _mainLocalizer,

+               coreLocations: coreLocations,
+               locationManager: _mainLocations,

                prefs: corePreferences,
                coreTree: coreTree,
                coreUploader: coreUploader,
                prefs: corePreferences,
                coreTree: coreTree,
                coreUploader: coreUploader,


@@ -118760,6 +103659,7 @@
                serviceMapillary: serviceMapillary,
                serviceMapRules: serviceMapRules,
                serviceNominatim: serviceNominatim,
                serviceMapillary: serviceMapillary,
                serviceMapRules: serviceMapRules,
                serviceNominatim: serviceNominatim,

+               serviceNsi: serviceNsi,

                serviceOpenstreetcam: serviceOpenstreetcam,
                serviceOsm: serviceOsm,
                serviceOsmWikibase: serviceOsmWikibase,
                serviceOpenstreetcam: serviceOpenstreetcam,
                serviceOsm: serviceOsm,
                serviceOsmWikibase: serviceOsmWikibase,


@@ -118800,6 +103700,7 @@
                uiFieldDefaultCheck: uiFieldCheck,
                uiFieldOnewayCheck: uiFieldCheck,
                uiFieldCheck: uiFieldCheck,
                uiFieldDefaultCheck: uiFieldCheck,
                uiFieldOnewayCheck: uiFieldCheck,
                uiFieldCheck: uiFieldCheck,

+               uiFieldManyCombo: uiFieldCombo,

                uiFieldMultiCombo: uiFieldCombo,
                uiFieldNetworkCombo: uiFieldCombo,
                uiFieldSemiCombo: uiFieldCombo,
                uiFieldMultiCombo: uiFieldCombo,
                uiFieldNetworkCombo: uiFieldCombo,
                uiFieldSemiCombo: uiFieldCombo,


@@ -118816,7 +103717,8 @@
                uiFieldCycleway: uiFieldCycleway,
                uiFieldLanes: uiFieldLanes,
                uiFieldLocalized: uiFieldLocalized,
                uiFieldCycleway: uiFieldCycleway,
                uiFieldLanes: uiFieldLanes,
                uiFieldLocalized: uiFieldLocalized,

-               uiFieldMaxspeed: uiFieldMaxspeed,
+               uiFieldRoadheight: uiFieldRoadheight,
+               uiFieldRoadspeed: uiFieldRoadspeed,

                uiFieldStructureRadio: uiFieldRadio,
                uiFieldRadio: uiFieldRadio,
                uiFieldRestrictions: uiFieldRestrictions,
                uiFieldStructureRadio: uiFieldRadio,
                uiFieldRadio: uiFieldRadio,
                uiFieldRestrictions: uiFieldRestrictions,


@@ -118942,9 +103844,10 @@
                utilDisplayLabel: utilDisplayLabel,
                utilEntityRoot: utilEntityRoot,
                utilEditDistance: utilEditDistance,
                utilDisplayLabel: utilDisplayLabel,
                utilEntityRoot: utilEntityRoot,
                utilEditDistance: utilEditDistance,

-               utilEntitySelector: utilEntitySelector,
+               utilEntityAndDeepMemberIDs: utilEntityAndDeepMemberIDs,

                utilEntityOrMemberSelector: utilEntityOrMemberSelector,
                utilEntityOrDeepMemberSelector: utilEntityOrDeepMemberSelector,
                utilEntityOrMemberSelector: utilEntityOrMemberSelector,
                utilEntityOrDeepMemberSelector: utilEntityOrDeepMemberSelector,

+               utilEntitySelector: utilEntitySelector,

                utilFastMouse: utilFastMouse,
                utilFunctor: utilFunctor,
                utilGetAllNodes: utilGetAllNodes,
                utilFastMouse: utilFastMouse,
                utilFunctor: utilFunctor,
                utilGetAllNodes: utilGetAllNodes,


@@ -118989,24 +103892,21 @@
                validationUnsquareWay: validationUnsquareWay
        });
 
                validationUnsquareWay: validationUnsquareWay
        });
 

-       // polyfill requestIdleCallback
-       window.requestIdleCallback = window.requestIdleCallback ||
-           function(cb) {
-               var start = Date.now();
-               return window.requestAnimationFrame(function() {
-                   cb({
-                       didTimeout: false,
-                       timeRemaining: function() {
-                           return Math.max(0, 50 - (Date.now() - start));
-                       }
-                   });
-               });
-           };
+       window.requestIdleCallback = window.requestIdleCallback || function (cb) {
+         var start = Date.now();
+         return window.requestAnimationFrame(function () {
+           cb({
+             didTimeout: false,
+             timeRemaining: function timeRemaining() {
+               return Math.max(0, 50 - (Date.now() - start));
+             }
+           });
+         });
+       };

 
 

-       window.cancelIdleCallback = window.cancelIdleCallback ||
-           function(id) {
-               window.cancelAnimationFrame(id);
-           };
+       window.cancelIdleCallback = window.cancelIdleCallback || function (id) {
+         window.cancelAnimationFrame(id);
+       };

        window.iD = iD;
 
 }());
        window.iD = iD;
 
 }());